sdl 2.0.8 update

Engine/lib/sdl/src/SDL.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -36,10 +36,7 @@
 
 /* Initialization/Cleanup routines */
 #if !SDL_TIMERS_DISABLED
-extern int SDL_TimerInit(void);
-extern void SDL_TimerQuit(void);
-extern void SDL_TicksInit(void);
-extern void SDL_TicksQuit(void);
+# include "timer/SDL_timer_c.h"
 #endif
 #if SDL_VIDEO_DRIVER_WINDOWS
 extern int SDL_HelperWindowCreate(void);
@@ -81,7 +78,7 @@ SDL_PrivateShouldInitSubsystem(Uint32 subsystem)
 {
     int subsystem_index = SDL_MostSignificantBitIndex32(subsystem);
     SDL_assert(SDL_SubsystemRefCount[subsystem_index] < 255);
-    return (SDL_SubsystemRefCount[subsystem_index] == 0);
+    return (SDL_SubsystemRefCount[subsystem_index] == 0) ? SDL_TRUE : SDL_FALSE;
 }
 
 /* Private helper to check if a system needs to be quit. */
@@ -95,7 +92,7 @@ SDL_PrivateShouldQuitSubsystem(Uint32 subsystem) {
     /* If we're in SDL_Quit, we shut down every subsystem, even if refcount
      * isn't zero.
      */
-    return SDL_SubsystemRefCount[subsystem_index] == 1 || SDL_bInMainQuit;
+    return (SDL_SubsystemRefCount[subsystem_index] == 1 || SDL_bInMainQuit) ? SDL_TRUE : SDL_FALSE;
 }
 
 void
@@ -456,7 +453,7 @@ SDL_GetPlatform()
 
 #if defined(__WIN32__)
 
-#if !defined(HAVE_LIBC) || (defined(__WATCOMC__) && defined(BUILD_DLL))
+#if (!defined(HAVE_LIBC) || defined(__WATCOMC__)) && !defined(SDL_STATIC_LIB)
 /* Need to include DllMain() on Watcom C for some reason.. */
 
 BOOL APIENTRY
@@ -472,7 +469,7 @@ _DllMainCRTStartup(HANDLE hModule,
     }
     return TRUE;
 }
-#endif /* building DLL with Watcom C */
+#endif /* Building DLL */
 
 #endif /* __WIN32__ */
 

Engine/lib/sdl/src/SDL_assert.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -44,7 +44,12 @@
 #endif
 #endif
 
-static SDL_assert_state
+#if defined(__EMSCRIPTEN__)
+#include <emscripten.h>
+#endif
+
+
+static SDL_assert_state SDLCALL
 SDL_PromptAssertion(const SDL_assert_data *data, void *userdata);
 
 /*
@@ -53,7 +58,10 @@ SDL_PromptAssertion(const SDL_assert_data *data, void *userdata);
  */
 static SDL_assert_data *triggered_assertions = NULL;
 
+#ifndef SDL_THREADS_DISABLED
 static SDL_mutex *assertion_mutex = NULL;
+#endif
+
 static SDL_AssertionHandler assertion_handler = SDL_PromptAssertion;
 static void *assertion_userdata = NULL;
 
@@ -111,23 +119,29 @@ static void SDL_GenerateAssertionReport(void)
     }
 }
 
-static void SDL_ExitProcess(int exitcode)
+
+static SDL_NORETURN void SDL_ExitProcess(int exitcode)
 {
 #ifdef __WIN32__
     ExitProcess(exitcode);
+#elif defined(__EMSCRIPTEN__)
+    emscripten_cancel_main_loop();  /* this should "kill" the app. */
+    emscripten_force_exit(exitcode);  /* this should "kill" the app. */
+    exit(exitcode);
 #else
     _exit(exitcode);
 #endif
 }
 
-static void SDL_AbortAssertion(void)
+
+static SDL_NORETURN void SDL_AbortAssertion(void)
 {
     SDL_Quit();
     SDL_ExitProcess(42);
 }
 
 
-static SDL_assert_state
+static SDL_assert_state SDLCALL
 SDL_PromptAssertion(const SDL_assert_data *data, void *userdata)
 {
 #ifdef __WIN32__
@@ -216,9 +230,45 @@ SDL_PromptAssertion(const SDL_assert_data *data, void *userdata)
             state = (SDL_assert_state)selected;
         }
     }
-#ifdef HAVE_STDIO_H
+
     else
     {
+#if defined(__EMSCRIPTEN__)
+        /* This is nasty, but we can't block on a custom UI. */
+        for ( ; ; ) {
+            SDL_bool okay = SDL_TRUE;
+            char *buf = (char *) EM_ASM_INT({
+                var str =
+                    Pointer_stringify($0) + '\n\n' +
+                    'Abort/Retry/Ignore/AlwaysIgnore? [ariA] :';
+                var reply = window.prompt(str, "i");
+                if (reply === null) {
+                    reply = "i";
+                }
+                return allocate(intArrayFromString(reply), 'i8', ALLOC_NORMAL);
+            }, message);
+
+            if (SDL_strcmp(buf, "a") == 0) {
+                state = SDL_ASSERTION_ABORT;
+            /* (currently) no break functionality on Emscripten
+            } else if (SDL_strcmp(buf, "b") == 0) {
+                state = SDL_ASSERTION_BREAK; */
+            } else if (SDL_strcmp(buf, "r") == 0) {
+                state = SDL_ASSERTION_RETRY;
+            } else if (SDL_strcmp(buf, "i") == 0) {
+                state = SDL_ASSERTION_IGNORE;
+            } else if (SDL_strcmp(buf, "A") == 0) {
+                state = SDL_ASSERTION_ALWAYS_IGNORE;
+            } else {
+                okay = SDL_FALSE;
+            }
+            free(buf);
+
+            if (okay) {
+                break;
+            }
+        }
+#elif defined(HAVE_STDIO_H)
         /* this is a little hacky. */
         for ( ; ; ) {
             char buf[32];
@@ -228,25 +278,25 @@ SDL_PromptAssertion(const SDL_assert_data *data, void *userdata)
                 break;
             }
 
-            if (SDL_strcmp(buf, "a") == 0) {
+            if (SDL_strncmp(buf, "a", 1) == 0) {
                 state = SDL_ASSERTION_ABORT;
                 break;
-            } else if (SDL_strcmp(buf, "b") == 0) {
+            } else if (SDL_strncmp(buf, "b", 1) == 0) {
                 state = SDL_ASSERTION_BREAK;
                 break;
-            } else if (SDL_strcmp(buf, "r") == 0) {
+            } else if (SDL_strncmp(buf, "r", 1) == 0) {
                 state = SDL_ASSERTION_RETRY;
                 break;
-            } else if (SDL_strcmp(buf, "i") == 0) {
+            } else if (SDL_strncmp(buf, "i", 1) == 0) {
                 state = SDL_ASSERTION_IGNORE;
                 break;
-            } else if (SDL_strcmp(buf, "A") == 0) {
+            } else if (SDL_strncmp(buf, "A", 1) == 0) {
                 state = SDL_ASSERTION_ALWAYS_IGNORE;
                 break;
             }
         }
-    }
 #endif /* HAVE_STDIO_H */
+    }
 
     /* Re-enter fullscreen mode */
     if (window) {
@@ -263,10 +313,11 @@ SDL_assert_state
 SDL_ReportAssertion(SDL_assert_data *data, const char *func, const char *file,
                     int line)
 {
-    static int assertion_running = 0;
-    static SDL_SpinLock spinlock = 0;
     SDL_assert_state state = SDL_ASSERTION_IGNORE;
+    static int assertion_running = 0;
 
+#ifndef SDL_THREADS_DISABLED
+    static SDL_SpinLock spinlock = 0;
     SDL_AtomicLock(&spinlock);
     if (assertion_mutex == NULL) { /* never called SDL_Init()? */
         assertion_mutex = SDL_CreateMutex();
@@ -280,6 +331,7 @@ SDL_ReportAssertion(SDL_assert_data *data, const char *func, const char *file,
     if (SDL_LockMutex(assertion_mutex) < 0) {
         return SDL_ASSERTION_IGNORE;   /* oh well, I guess. */
     }
+#endif
 
     /* doing this because Visual C is upset over assigning in the macro. */
     if (data->trigger_count == 0) {
@@ -323,7 +375,10 @@ SDL_ReportAssertion(SDL_assert_data *data, const char *func, const char *file,
     }
 
     assertion_running--;
+
+#ifndef SDL_THREADS_DISABLED
     SDL_UnlockMutex(assertion_mutex);
+#endif
 
     return state;
 }
@@ -332,10 +387,12 @@ SDL_ReportAssertion(SDL_assert_data *data, const char *func, const char *file,
 void SDL_AssertionsQuit(void)
 {
     SDL_GenerateAssertionReport();
+#ifndef SDL_THREADS_DISABLED
     if (assertion_mutex != NULL) {
         SDL_DestroyMutex(assertion_mutex);
         assertion_mutex = NULL;
     }
+#endif
 }
 
 void SDL_SetAssertionHandler(SDL_AssertionHandler handler, void *userdata)

Engine/lib/sdl/src/SDL_assert_c.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages

Engine/lib/sdl/src/SDL_dataqueue.c

@@ -0,0 +1,339 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "./SDL_internal.h"
+#include "SDL.h"
+#include "./SDL_dataqueue.h"
+#include "SDL_assert.h"
+
+typedef struct SDL_DataQueuePacket
+{
+    size_t datalen;  /* bytes currently in use in this packet. */
+    size_t startpos;  /* bytes currently consumed in this packet. */
+    struct SDL_DataQueuePacket *next;  /* next item in linked list. */
+    Uint8 data[SDL_VARIABLE_LENGTH_ARRAY];  /* packet data */
+} SDL_DataQueuePacket;
+
+struct SDL_DataQueue
+{
+    SDL_DataQueuePacket *head; /* device fed from here. */
+    SDL_DataQueuePacket *tail; /* queue fills to here. */
+    SDL_DataQueuePacket *pool; /* these are unused packets. */
+    size_t packet_size;   /* size of new packets */
+    size_t queued_bytes;  /* number of bytes of data in the queue. */
+};
+
+static void
+SDL_FreeDataQueueList(SDL_DataQueuePacket *packet)
+{
+    while (packet) {
+        SDL_DataQueuePacket *next = packet->next;
+        SDL_free(packet);
+        packet = next;
+    }
+}
+
+
+/* this all expects that you managed thread safety elsewhere. */
+
+SDL_DataQueue *
+SDL_NewDataQueue(const size_t _packetlen, const size_t initialslack)
+{
+    SDL_DataQueue *queue = (SDL_DataQueue *) SDL_malloc(sizeof (SDL_DataQueue));
+
+    if (!queue) {
+        SDL_OutOfMemory();
+        return NULL;
+    } else {
+        const size_t packetlen = _packetlen ? _packetlen : 1024;
+        const size_t wantpackets = (initialslack + (packetlen - 1)) / packetlen;
+        size_t i;
+
+        SDL_zerop(queue);
+        queue->packet_size = packetlen;
+
+        for (i = 0; i < wantpackets; i++) {
+            SDL_DataQueuePacket *packet = (SDL_DataQueuePacket *) SDL_malloc(sizeof (SDL_DataQueuePacket) + packetlen);
+            if (packet) { /* don't care if this fails, we'll deal later. */
+                packet->datalen = 0;
+                packet->startpos = 0;
+                packet->next = queue->pool;
+                queue->pool = packet;
+            }
+        }
+    }
+
+    return queue;
+}
+
+void
+SDL_FreeDataQueue(SDL_DataQueue *queue)
+{
+    if (queue) {
+        SDL_FreeDataQueueList(queue->head);
+        SDL_FreeDataQueueList(queue->pool);
+        SDL_free(queue);
+    }
+}
+
+void
+SDL_ClearDataQueue(SDL_DataQueue *queue, const size_t slack)
+{
+    const size_t packet_size = queue ? queue->packet_size : 1;
+    const size_t slackpackets = (slack + (packet_size-1)) / packet_size;
+    SDL_DataQueuePacket *packet;
+    SDL_DataQueuePacket *prev = NULL;
+    size_t i;
+
+    if (!queue) {
+        return;
+    }
+
+    packet = queue->head;
+
+    /* merge the available pool and the current queue into one list. */
+    if (packet) {
+        queue->tail->next = queue->pool;
+    } else {
+        packet = queue->pool;
+    }
+
+    /* Remove the queued packets from the device. */
+    queue->tail = NULL;
+    queue->head = NULL;
+    queue->queued_bytes = 0;
+    queue->pool = packet;
+
+    /* Optionally keep some slack in the pool to reduce malloc pressure. */
+    for (i = 0; packet && (i < slackpackets); i++) {
+        prev = packet;
+        packet = packet->next;
+    }
+
+    if (prev) {
+        prev->next = NULL;
+    } else {
+        queue->pool = NULL;
+    }
+
+    SDL_FreeDataQueueList(packet);  /* free extra packets */
+}
+
+static SDL_DataQueuePacket *
+AllocateDataQueuePacket(SDL_DataQueue *queue)
+{
+    SDL_DataQueuePacket *packet;
+
+    SDL_assert(queue != NULL);
+
+    packet = queue->pool;
+    if (packet != NULL) {
+        /* we have one available in the pool. */
+        queue->pool = packet->next;
+    } else {
+        /* Have to allocate a new one! */
+        packet = (SDL_DataQueuePacket *) SDL_malloc(sizeof (SDL_DataQueuePacket) + queue->packet_size);
+        if (packet == NULL) {
+            return NULL;
+        }
+    }
+
+    packet->datalen = 0;
+    packet->startpos = 0;
+    packet->next = NULL;
+                
+    SDL_assert((queue->head != NULL) == (queue->queued_bytes != 0));
+    if (queue->tail == NULL) {
+        queue->head = packet;
+    } else {
+        queue->tail->next = packet;
+    }
+    queue->tail = packet;
+    return packet;
+}
+
+
+int
+SDL_WriteToDataQueue(SDL_DataQueue *queue, const void *_data, const size_t _len)
+{
+    size_t len = _len;
+    const Uint8 *data = (const Uint8 *) _data;
+    const size_t packet_size = queue ? queue->packet_size : 0;
+    SDL_DataQueuePacket *orighead;
+    SDL_DataQueuePacket *origtail;
+    size_t origlen;
+    size_t datalen;
+
+    if (!queue) {
+        return SDL_InvalidParamError("queue");
+    }
+
+    orighead = queue->head;
+    origtail = queue->tail;
+    origlen = origtail ? origtail->datalen : 0;
+
+    while (len > 0) {
+        SDL_DataQueuePacket *packet = queue->tail;
+        SDL_assert(!packet || (packet->datalen <= packet_size));
+        if (!packet || (packet->datalen >= packet_size)) {
+            /* tail packet missing or completely full; we need a new packet. */
+            packet = AllocateDataQueuePacket(queue);
+            if (!packet) {
+                /* uhoh, reset so we've queued nothing new, free what we can. */
+                if (!origtail) {
+                    packet = queue->head;  /* whole queue. */
+                } else {
+                    packet = origtail->next;  /* what we added to existing queue. */
+                    origtail->next = NULL;
+                    origtail->datalen = origlen;
+                }
+                queue->head = orighead;
+                queue->tail = origtail;
+                queue->pool = NULL;
+
+                SDL_FreeDataQueueList(packet);  /* give back what we can. */
+                return SDL_OutOfMemory();
+            }
+        }
+
+        datalen = SDL_min(len, packet_size - packet->datalen);
+        SDL_memcpy(packet->data + packet->datalen, data, datalen);
+        data += datalen;
+        len -= datalen;
+        packet->datalen += datalen;
+        queue->queued_bytes += datalen;
+    }
+
+    return 0;
+}
+
+size_t
+SDL_PeekIntoDataQueue(SDL_DataQueue *queue, void *_buf, const size_t _len)
+{
+    size_t len = _len;
+    Uint8 *buf = (Uint8 *) _buf;
+    Uint8 *ptr = buf;
+    SDL_DataQueuePacket *packet;
+
+    if (!queue) {
+        return 0;
+    }
+
+    for (packet = queue->head; len && packet; packet = packet->next) {
+        const size_t avail = packet->datalen - packet->startpos;
+        const size_t cpy = SDL_min(len, avail);
+        SDL_assert(queue->queued_bytes >= avail);
+
+        SDL_memcpy(ptr, packet->data + packet->startpos, cpy);
+        ptr += cpy;
+        len -= cpy;
+    }
+
+    return (size_t) (ptr - buf);
+}
+
+size_t
+SDL_ReadFromDataQueue(SDL_DataQueue *queue, void *_buf, const size_t _len)
+{
+    size_t len = _len;
+    Uint8 *buf = (Uint8 *) _buf;
+    Uint8 *ptr = buf;
+    SDL_DataQueuePacket *packet;
+
+    if (!queue) {
+        return 0;
+    }
+
+    while ((len > 0) && ((packet = queue->head) != NULL)) {
+        const size_t avail = packet->datalen - packet->startpos;
+        const size_t cpy = SDL_min(len, avail);
+        SDL_assert(queue->queued_bytes >= avail);
+
+        SDL_memcpy(ptr, packet->data + packet->startpos, cpy);
+        packet->startpos += cpy;
+        ptr += cpy;
+        queue->queued_bytes -= cpy;
+        len -= cpy;
+
+        if (packet->startpos == packet->datalen) {  /* packet is done, put it in the pool. */
+            queue->head = packet->next;
+            SDL_assert((packet->next != NULL) || (packet == queue->tail));
+            packet->next = queue->pool;
+            queue->pool = packet;
+        }
+    }
+
+    SDL_assert((queue->head != NULL) == (queue->queued_bytes != 0));
+
+    if (queue->head == NULL) {
+        queue->tail = NULL;  /* in case we drained the queue entirely. */
+    }
+
+    return (size_t) (ptr - buf);
+}
+
+size_t
+SDL_CountDataQueue(SDL_DataQueue *queue)
+{
+    return queue ? queue->queued_bytes : 0;
+}
+
+void *
+SDL_ReserveSpaceInDataQueue(SDL_DataQueue *queue, const size_t len)
+{
+    SDL_DataQueuePacket *packet;
+
+    if (!queue) {
+        SDL_InvalidParamError("queue");
+        return NULL;
+    } else if (len == 0) {
+        SDL_InvalidParamError("len");
+        return NULL;
+    } else if (len > queue->packet_size) {
+        SDL_SetError("len is larger than packet size");
+        return NULL;
+    }
+
+    packet = queue->head;
+    if (packet) {
+        const size_t avail = queue->packet_size - packet->datalen;
+        if (len <= avail) {  /* we can use the space at end of this packet. */
+            void *retval = packet->data + packet->datalen;
+            packet->datalen += len;
+            queue->queued_bytes += len;
+            return retval;
+        }
+    }
+
+    /* Need a fresh packet. */
+    packet = AllocateDataQueuePacket(queue);
+    if (!packet) {
+        SDL_OutOfMemory();
+        return NULL;
+    }
+
+    packet->datalen = len;
+    queue->queued_bytes += len;
+    return packet->data;
+}
+
+/* vi: set ts=4 sw=4 expandtab: */
+

Engine/lib/sdl/src/SDL_dataqueue.h

@@ -0,0 +1,55 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#ifndef SDL_dataqueue_h_
+#define SDL_dataqueue_h_
+
+/* this is not (currently) a public API. But maybe it should be! */
+
+struct SDL_DataQueue;
+typedef struct SDL_DataQueue SDL_DataQueue;
+
+SDL_DataQueue *SDL_NewDataQueue(const size_t packetlen, const size_t initialslack);
+void SDL_FreeDataQueue(SDL_DataQueue *queue);
+void SDL_ClearDataQueue(SDL_DataQueue *queue, const size_t slack);
+int SDL_WriteToDataQueue(SDL_DataQueue *queue, const void *data, const size_t len);
+size_t SDL_ReadFromDataQueue(SDL_DataQueue *queue, void *buf, const size_t len);
+size_t SDL_PeekIntoDataQueue(SDL_DataQueue *queue, void *buf, const size_t len);
+size_t SDL_CountDataQueue(SDL_DataQueue *queue);
+
+/* this sets a section of the data queue aside (possibly allocating memory for it)
+   as if it's been written to, but returns a pointer to that space. You may write
+   to this space until a read would consume it. Writes (and other calls to this
+   function) will safely append their data after this reserved space and can
+   be in flight at the same time. There is no thread safety.
+   If there isn't an existing block of memory that can contain the reserved
+   space, one will be allocated for it. You can not (currently) allocate
+   a space larger than the packetlen requested in SDL_NewDataQueue.
+   Returned buffer is uninitialized.
+   This lets you avoid an extra copy in some cases, but it's safer to use
+   SDL_WriteToDataQueue() unless you know what you're doing.
+   Returns pointer to buffer of at least (len) bytes, NULL on error.
+*/
+void *SDL_ReserveSpaceInDataQueue(SDL_DataQueue *queue, const size_t len);
+
+#endif /* SDL_dataqueue_h_ */
+
+/* vi: set ts=4 sw=4 expandtab: */
+

Engine/lib/sdl/src/SDL_error.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -49,6 +49,8 @@ SDL_LookupString(const char *key)
 
 /* Public functions */
 
+static char *SDL_GetErrorMsg(char *errstr, int maxlen);
+
 int
 SDL_SetError(SDL_PRINTF_FORMAT_STRING const char *fmt, ...)
 {
@@ -74,6 +76,16 @@ SDL_SetError(SDL_PRINTF_FORMAT_STRING const char *fmt, ...)
             case 0:            /* Malformed format string.. */
                 --fmt;
                 break;
+            case 'l':
+                switch (*fmt++) {
+                case 0:        /* Malformed format string.. */
+                    --fmt;
+                    break;
+                case 'i': case 'd': case 'u':
+                    error->args[error->argc++].value_l = va_arg(ap, long);
+                    break;
+                }
+                break;
             case 'c':
             case 'i':
             case 'd':
@@ -110,16 +122,83 @@ SDL_SetError(SDL_PRINTF_FORMAT_STRING const char *fmt, ...)
     }
     va_end(ap);
 
-    /* If we are in debug mode, print out an error message */
-    SDL_LogDebug(SDL_LOG_CATEGORY_ERROR, "%s", SDL_GetError());
-
+    if (SDL_LogGetPriority(SDL_LOG_CATEGORY_ERROR) <= SDL_LOG_PRIORITY_DEBUG) {
+        /* If we are in debug mode, print out an error message
+         * Avoid stomping on the static buffer in GetError, just
+         * in case this is called while processing a ShowMessageBox to
+         * show an error already in that static buffer.
+         */
+        char errmsg[SDL_ERRBUFIZE];
+        SDL_GetErrorMsg(errmsg, sizeof(errmsg));
+        SDL_LogDebug(SDL_LOG_CATEGORY_ERROR, "%s", errmsg);
+    }
     return -1;
 }
 
-#ifdef __GNUC__
-#pragma GCC diagnostic push
+/* Available for backwards compatibility */
+const char *
+SDL_GetError(void)
+{
+    static char errmsg[SDL_ERRBUFIZE];
+
+    return SDL_GetErrorMsg(errmsg, SDL_ERRBUFIZE);
+}
+
+void
+SDL_ClearError(void)
+{
+    SDL_error *error;
+
+    error = SDL_GetErrBuf();
+    error->error = 0;
+}
+
+/* Very common errors go here */
+int
+SDL_Error(SDL_errorcode code)
+{
+    switch (code) {
+    case SDL_ENOMEM:
+        return SDL_SetError("Out of memory");
+    case SDL_EFREAD:
+        return SDL_SetError("Error reading from datastream");
+    case SDL_EFWRITE:
+        return SDL_SetError("Error writing to datastream");
+    case SDL_EFSEEK:
+        return SDL_SetError("Error seeking in datastream");
+    case SDL_UNSUPPORTED:
+        return SDL_SetError("That operation is not supported");
+    default:
+        return SDL_SetError("Unknown SDL error");
+    }
+}
+
+#ifdef TEST_ERROR
+int
+main(int argc, char *argv[])
+{
+    char buffer[BUFSIZ + 1];
+
+    SDL_SetError("Hi there!");
+    printf("Error 1: %s\n", SDL_GetError());
+    SDL_ClearError();
+    SDL_memset(buffer, '1', BUFSIZ);
+    buffer[BUFSIZ] = 0;
+    SDL_SetError("This is the error: %s (%f)", buffer, 1.0);
+    printf("Error 2: %s\n", SDL_GetError());
+    exit(0);
+}
+#endif
+
+
+/* keep this at the end of the file so it works with GCC builds that don't
+   support "#pragma GCC diagnostic push" ... we'll just leave the warning
+   disabled after this. */
+/* this pragma arrived in GCC 4.2 and causes a warning on older GCCs! Sigh. */
+#if defined(__clang__) || (defined(__GNUC__) && ((__GNUC__ > 4) || (__GNUC__ == 4 && (__GNUC_MINOR__ >= 2))))
 #pragma GCC diagnostic ignored "-Wformat-nonliteral"
 #endif
+
 /* This function has a bit more overhead than most error functions
    so that it supports internationalization and thread-safe errors.
 */
@@ -150,6 +229,22 @@ SDL_GetErrorMsg(char *errstr, int maxlen)
                        && spot < (tmp + SDL_arraysize(tmp) - 2)) {
                     *spot++ = *fmt++;
                 }
+                if (*fmt == 'l') {
+                    *spot++ = *fmt++;
+                    *spot++ = *fmt++;
+                    *spot++ = '\0';
+                    switch (spot[-2]) {
+                    case 'i': case 'd': case 'u':
+                      len = SDL_snprintf(msg, maxlen, tmp,
+                                         error->args[argi++].value_l);
+                      if (len > 0) {
+                          msg += len;
+                          maxlen -= len;
+                      }
+                      break;
+                    }
+                    continue;
+                }
                 *spot++ = *fmt++;
                 *spot++ = '\0';
                 switch (spot[-2]) {
@@ -220,63 +315,5 @@ SDL_GetErrorMsg(char *errstr, int maxlen)
     }
     return (errstr);
 }
-#ifdef __GNUC__
-#pragma GCC diagnostic pop
-#endif
-
-/* Available for backwards compatibility */
-const char *
-SDL_GetError(void)
-{
-    static char errmsg[SDL_ERRBUFIZE];
-
-    return SDL_GetErrorMsg(errmsg, SDL_ERRBUFIZE);
-}
-
-void
-SDL_ClearError(void)
-{
-    SDL_error *error;
-
-    error = SDL_GetErrBuf();
-    error->error = 0;
-}
-
-/* Very common errors go here */
-int
-SDL_Error(SDL_errorcode code)
-{
-    switch (code) {
-    case SDL_ENOMEM:
-        return SDL_SetError("Out of memory");
-    case SDL_EFREAD:
-        return SDL_SetError("Error reading from datastream");
-    case SDL_EFWRITE:
-        return SDL_SetError("Error writing to datastream");
-    case SDL_EFSEEK:
-        return SDL_SetError("Error seeking in datastream");
-    case SDL_UNSUPPORTED:
-        return SDL_SetError("That operation is not supported");
-    default:
-        return SDL_SetError("Unknown SDL error");
-    }
-}
-
-#ifdef TEST_ERROR
-int
-main(int argc, char *argv[])
-{
-    char buffer[BUFSIZ + 1];
-
-    SDL_SetError("Hi there!");
-    printf("Error 1: %s\n", SDL_GetError());
-    SDL_ClearError();
-    SDL_memset(buffer, '1', BUFSIZ);
-    buffer[BUFSIZ] = 0;
-    SDL_SetError("This is the error: %s (%f)", buffer, 1.0);
-    printf("Error 2: %s\n", SDL_GetError());
-    exit(0);
-}
-#endif
 
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/SDL_error_c.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -24,8 +24,8 @@
    error messages
 */
 
-#ifndef _SDL_error_c_h
-#define _SDL_error_c_h
+#ifndef SDL_error_c_h_
+#define SDL_error_c_h_
 
 #define ERR_MAX_STRLEN  128
 #define ERR_MAX_ARGS    5
@@ -51,6 +51,7 @@ typedef struct SDL_error
         unsigned char value_c;
 #endif
         int value_i;
+        long value_l;
         double value_f;
         char buf[ERR_MAX_STRLEN];
     } args[ERR_MAX_ARGS];
@@ -59,6 +60,6 @@ typedef struct SDL_error
 /* Defined in SDL_thread.c */
 extern SDL_error *SDL_GetErrBuf(void);
 
-#endif /* _SDL_error_c_h */
+#endif /* SDL_error_c_h_ */
 
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/SDL_hints.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -122,7 +122,7 @@ SDL_bool
 SDL_GetHintBoolean(const char *name, SDL_bool default_value)
 {
     const char *hint = SDL_GetHint(name);
-    if (!hint) {
+    if (!hint || !*hint) {
         return default_value;
     }
     if (*hint == '0' || SDL_strcasecmp(hint, "false") == 0) {

Engine/lib/sdl/src/SDL_internal.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -18,8 +18,22 @@
      misrepresented as being the original software.
   3. This notice may not be removed or altered from any source distribution.
 */
-#ifndef _SDL_internal_h
-#define _SDL_internal_h
+#ifndef SDL_internal_h_
+#define SDL_internal_h_
+
+/* Many of SDL's features require _GNU_SOURCE on various platforms */
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+
+/* This is for a variable-length array at the end of a struct:
+    struct x { int y; char z[SDL_VARIABLE_LENGTH_ARRAY]; };
+   Use this because GCC 2 needs different magic than other compilers. */
+#if (defined(__GNUC__) && (__GNUC__ <= 2)) || defined(__CC_ARM) || defined(__cplusplus)
+#define SDL_VARIABLE_LENGTH_ARRAY 1
+#else
+#define SDL_VARIABLE_LENGTH_ARRAY
+#endif
 
 #include "dynapi/SDL_dynapi.h"
 
@@ -33,6 +47,6 @@
 
 #include "SDL_config.h"
 
-#endif
+#endif /* SDL_internal_h_ */
 
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/SDL_log.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -50,9 +50,7 @@ typedef struct SDL_LogLevel
 } SDL_LogLevel;
 
 /* The default log output function */
-static void SDL_LogOutput(void *userdata,
-                          int category, SDL_LogPriority priority,
-                          const char *message);
+static void SDLCALL SDL_LogOutput(void *userdata, int category, SDL_LogPriority priority, const char *message);
 
 static SDL_LogLevel *SDL_loglevels;
 static SDL_LogPriority SDL_default_priority = DEFAULT_PRIORITY;
@@ -304,15 +302,15 @@ SDL_LogMessageV(int category, SDL_LogPriority priority, const char *fmt, va_list
     SDL_stack_free(message);
 }
 
-#if defined(__WIN32__)
-/* Flag tracking the attachment of the console: 0=unattached, 1=attached, -1=error */
+#if defined(__WIN32__) && !defined(HAVE_STDIO_H) && !defined(__WINRT__)
+/* Flag tracking the attachment of the console: 0=unattached, 1=attached to a console, 2=attached to a file, -1=error */
 static int consoleAttached = 0;
 
 /* Handle to stderr output of console. */
 static HANDLE stderrHandle = NULL;
 #endif
 
-static void
+static void SDLCALL
 SDL_LogOutput(void *userdata, int category, SDL_LogPriority priority,
               const char *message)
 {
@@ -328,6 +326,7 @@ SDL_LogOutput(void *userdata, int category, SDL_LogPriority priority,
         BOOL attachResult;
         DWORD attachError;
         unsigned long charsWritten; 
+        DWORD consoleMode;
 
         /* Maybe attach console and get stderr handle */
         if (consoleAttached == 0) {
@@ -335,7 +334,8 @@ SDL_LogOutput(void *userdata, int category, SDL_LogPriority priority,
             if (!attachResult) {
                     attachError = GetLastError();
                     if (attachError == ERROR_INVALID_HANDLE) {
-                        OutputDebugString(TEXT("Parent process has no console\r\n"));
+                        /* This is expected when running from Visual Studio */
+                        /*OutputDebugString(TEXT("Parent process has no console\r\n"));*/
                         consoleAttached = -1;
                     } else if (attachError == ERROR_GEN_FAILURE) {
                          OutputDebugString(TEXT("Could not attach to console of parent process\r\n"));
@@ -351,9 +351,14 @@ SDL_LogOutput(void *userdata, int category, SDL_LogPriority priority,
                     /* Newly attached */
                     consoleAttached = 1;
                 }
-			
+
                 if (consoleAttached == 1) {
                         stderrHandle = GetStdHandle(STD_ERROR_HANDLE);
+
+                        if (GetConsoleMode(stderrHandle, &consoleMode) == 0) {
+                            /* WriteConsole fails if the output is redirected to a file. Must use WriteFile instead. */
+                            consoleAttached = 2;
+                        }
                 }
         }
 #endif /* !defined(HAVE_STDIO_H) && !defined(__WINRT__) */
@@ -375,6 +380,11 @@ SDL_LogOutput(void *userdata, int category, SDL_LogPriority priority,
                         OutputDebugString(TEXT("Insufficient heap memory to write message\r\n"));
                     }
                 }
+
+        } else if (consoleAttached == 2) {
+            if (!WriteFile(stderrHandle, output, lstrlenA(output), &charsWritten, NULL)) {
+                OutputDebugString(TEXT("Error calling WriteFile\r\n"));
+            }
         }
 #endif /* !defined(HAVE_STDIO_H) && !defined(__WINRT__) */
 

Engine/lib/sdl/src/atomic/SDL_atomic.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -35,6 +35,48 @@
 #include <atomic.h>
 #endif
 
+/* The __atomic_load_n() intrinsic showed up in different times for different compilers. */
+#if defined(HAVE_GCC_ATOMICS)
+# if defined(__clang__)
+#   if __has_builtin(__atomic_load_n)
+      /* !!! FIXME: this advertises as available in the NDK but uses an external symbol we don't have.
+         It might be in a later NDK or we might need an extra library? --ryan. */
+#     if !defined(__ANDROID__)
+#       define HAVE_ATOMIC_LOAD_N 1
+#     endif
+#   endif
+# elif defined(__GNUC__)
+#   if (__GNUC__ >= 5)
+#     define HAVE_ATOMIC_LOAD_N 1
+#   endif
+# endif
+#endif
+
+#if defined(__WATCOMC__) && defined(__386__)
+#define HAVE_WATCOM_ATOMICS
+extern _inline int _SDL_xchg_watcom(volatile int *a, int v);
+#pragma aux _SDL_xchg_watcom = \
+  "xchg [ecx], eax" \
+  parm [ecx] [eax] \
+  value [eax] \
+  modify exact [eax];
+
+extern _inline unsigned char _SDL_cmpxchg_watcom(volatile int *a, int newval, int oldval);
+#pragma aux _SDL_cmpxchg_watcom = \
+  "lock cmpxchg [edx], ecx" \
+  "setz al" \
+  parm [edx] [ecx] [eax] \
+  value [al] \
+  modify exact [eax];
+
+extern _inline int _SDL_xadd_watcom(volatile int *a, int v);
+#pragma aux _SDL_xadd_watcom = \
+  "lock xadd [ecx], eax" \
+  parm [ecx] [eax] \
+  value [eax] \
+  modify exact [eax];
+#endif /* __WATCOMC__ && __386__ */
+
 /*
   If any of the operations are not provided then we must emulate some
   of them. That means we need a nice implementation of spin locks
@@ -58,7 +100,7 @@
   Contributed by Bob Pendleton, bob@pendleton.com
 */
 
-#if !defined(HAVE_MSC_ATOMICS) && !defined(HAVE_GCC_ATOMICS) && !defined(__MACOSX__) && !defined(__SOLARIS__)
+#if !defined(HAVE_MSC_ATOMICS) && !defined(HAVE_GCC_ATOMICS) && !defined(__MACOSX__) && !defined(__SOLARIS__) && !defined(HAVE_WATCOM_ATOMICS)
 #define EMULATE_CAS 1
 #endif
 
@@ -88,10 +130,12 @@ SDL_AtomicCAS(SDL_atomic_t *a, int oldval, int newval)
 {
 #ifdef HAVE_MSC_ATOMICS
     return (_InterlockedCompareExchange((long*)&a->value, (long)newval, (long)oldval) == (long)oldval);
-#elif defined(__MACOSX__)  /* !!! FIXME: should we favor gcc atomics? */
-    return (SDL_bool) OSAtomicCompareAndSwap32Barrier(oldval, newval, &a->value);
+#elif defined(HAVE_WATCOM_ATOMICS)
+    return (SDL_bool) _SDL_cmpxchg_watcom(&a->value, newval, oldval);
 #elif defined(HAVE_GCC_ATOMICS)
     return (SDL_bool) __sync_bool_compare_and_swap(&a->value, oldval, newval);
+#elif defined(__MACOSX__)  /* this is deprecated in 10.12 sdk; favor gcc atomics. */
+    return (SDL_bool) OSAtomicCompareAndSwap32Barrier(oldval, newval, &a->value);
 #elif defined(__SOLARIS__) && defined(_LP64)
     return (SDL_bool) ((int) atomic_cas_64((volatile uint64_t*)&a->value, (uint64_t)oldval, (uint64_t)newval) == oldval);
 #elif defined(__SOLARIS__) && !defined(_LP64)
@@ -119,12 +163,14 @@ SDL_AtomicCASPtr(void **a, void *oldval, void *newval)
     return (_InterlockedCompareExchange((long*)a, (long)newval, (long)oldval) == (long)oldval);
 #elif defined(HAVE_MSC_ATOMICS) && (!_M_IX86)
     return (_InterlockedCompareExchangePointer(a, newval, oldval) == oldval);
-#elif defined(__MACOSX__) && defined(__LP64__)   /* !!! FIXME: should we favor gcc atomics? */
-    return (SDL_bool) OSAtomicCompareAndSwap64Barrier((int64_t)oldval, (int64_t)newval, (int64_t*) a);
-#elif defined(__MACOSX__) && !defined(__LP64__)  /* !!! FIXME: should we favor gcc atomics? */
-    return (SDL_bool) OSAtomicCompareAndSwap32Barrier((int32_t)oldval, (int32_t)newval, (int32_t*) a);
+#elif defined(HAVE_WATCOM_ATOMICS)
+    return (SDL_bool) _SDL_cmpxchg_watcom((int *)a, (long)newval, (long)oldval);
 #elif defined(HAVE_GCC_ATOMICS)
     return __sync_bool_compare_and_swap(a, oldval, newval);
+#elif defined(__MACOSX__) && defined(__LP64__)  /* this is deprecated in 10.12 sdk; favor gcc atomics. */
+    return (SDL_bool) OSAtomicCompareAndSwap64Barrier((int64_t)oldval, (int64_t)newval, (int64_t*) a);
+#elif defined(__MACOSX__) && !defined(__LP64__)  /* this is deprecated in 10.12 sdk; favor gcc atomics. */
+    return (SDL_bool) OSAtomicCompareAndSwap32Barrier((int32_t)oldval, (int32_t)newval, (int32_t*) a);
 #elif defined(__SOLARIS__)
     return (SDL_bool) (atomic_cas_ptr(a, oldval, newval) == oldval);
 #elif EMULATE_CAS
@@ -148,6 +194,8 @@ SDL_AtomicSet(SDL_atomic_t *a, int v)
 {
 #ifdef HAVE_MSC_ATOMICS
     return _InterlockedExchange((long*)&a->value, v);
+#elif defined(HAVE_WATCOM_ATOMICS)
+    return _SDL_xchg_watcom(&a->value, v);
 #elif defined(HAVE_GCC_ATOMICS)
     return __sync_lock_test_and_set(&a->value, v);
 #elif defined(__SOLARIS__) && defined(_LP64)
@@ -170,6 +218,8 @@ SDL_AtomicSetPtr(void **a, void *v)
     return (void *) _InterlockedExchange((long *)a, (long) v);
 #elif defined(HAVE_MSC_ATOMICS) && (!_M_IX86)
     return _InterlockedExchangePointer(a, v);
+#elif defined(HAVE_WATCOM_ATOMICS)
+    return (void *) _SDL_xchg_watcom((int *)a, (long)v);
 #elif defined(HAVE_GCC_ATOMICS)
     return __sync_lock_test_and_set(a, v);
 #elif defined(__SOLARIS__)
@@ -188,6 +238,8 @@ SDL_AtomicAdd(SDL_atomic_t *a, int v)
 {
 #ifdef HAVE_MSC_ATOMICS
     return _InterlockedExchangeAdd((long*)&a->value, v);
+#elif defined(HAVE_WATCOM_ATOMICS)
+    return _SDL_xadd_watcom(&a->value, v);
 #elif defined(HAVE_GCC_ATOMICS)
     return __sync_fetch_and_add(&a->value, v);
 #elif defined(__SOLARIS__)
@@ -211,36 +263,41 @@ SDL_AtomicAdd(SDL_atomic_t *a, int v)
 int
 SDL_AtomicGet(SDL_atomic_t *a)
 {
+#ifdef HAVE_ATOMIC_LOAD_N
+    return __atomic_load_n(&a->value, __ATOMIC_SEQ_CST);
+#else
     int value;
     do {
         value = a->value;
     } while (!SDL_AtomicCAS(a, value, value));
     return value;
+#endif
 }
 
 void *
 SDL_AtomicGetPtr(void **a)
 {
+#ifdef HAVE_ATOMIC_LOAD_N
+    return __atomic_load_n(a, __ATOMIC_SEQ_CST);
+#else
     void *value;
     do {
         value = *a;
     } while (!SDL_AtomicCASPtr(a, value, value));
     return value;
+#endif
 }
 
-#ifdef __thumb__
-#if defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6T2__) || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__)
-__asm__(
-"   .align 2\n"
-"   .globl _SDL_MemoryBarrierRelease\n"
-"   .globl _SDL_MemoryBarrierAcquire\n"
-"_SDL_MemoryBarrierRelease:\n"
-"_SDL_MemoryBarrierAcquire:\n"
-"   mov r0, #0\n"
-"   mcr p15, 0, r0, c7, c10, 5\n"
-"   bx lr\n"
-);
-#endif
-#endif
+void
+SDL_MemoryBarrierReleaseFunction(void)
+{
+    SDL_MemoryBarrierRelease();
+}
+
+void
+SDL_MemoryBarrierAcquireFunction(void)
+{
+    SDL_MemoryBarrierAcquire();
+}
 
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/atomic/SDL_spinlock.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -32,6 +32,16 @@
 #include <atomic.h>
 #endif
 
+#if defined(__WATCOMC__) && defined(__386__)
+SDL_COMPILE_TIME_ASSERT(locksize, 4==sizeof(SDL_SpinLock));
+extern _inline int _SDL_xchg_watcom(volatile int *a, int v);
+#pragma aux _SDL_xchg_watcom = \
+  "xchg [ecx], eax" \
+  parm [ecx] [eax] \
+  value [eax] \
+  modify exact [eax];
+#endif /* __WATCOMC__ && __386__ */
+
 /* This function is where all the magic happens... */
 SDL_bool
 SDL_AtomicTryLock(SDL_SpinLock *lock)
@@ -58,6 +68,9 @@ SDL_AtomicTryLock(SDL_SpinLock *lock)
     SDL_COMPILE_TIME_ASSERT(locksize, sizeof(*lock) == sizeof(long));
     return (InterlockedExchange((long*)lock, 1) == 0);
 
+#elif defined(__WATCOMC__) && defined(__386__)
+    return _SDL_xchg_watcom(lock, 1) == 0;
+
 #elif HAVE_GCC_ATOMICS || HAVE_GCC_SYNC_LOCK_TEST_AND_SET
     return (__sync_lock_test_and_set(lock, 1) == 0);
 
@@ -119,6 +132,10 @@ SDL_AtomicUnlock(SDL_SpinLock *lock)
     _ReadWriteBarrier();
     *lock = 0;
 
+#elif defined(__WATCOMC__) && defined(__386__)
+    SDL_CompilerBarrier ();
+    *lock = 0;
+
 #elif HAVE_GCC_ATOMICS || HAVE_GCC_SYNC_LOCK_TEST_AND_SET
     __sync_lock_release(lock);
 

Engine/lib/sdl/src/audio/SDL_audio.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -33,36 +33,6 @@
 static SDL_AudioDriver current_audio;
 static SDL_AudioDevice *open_devices[16];
 
-/*
- * Not all of these will be compiled and linked in, but it's convenient
- *  to have a complete list here and saves yet-another block of #ifdefs...
- *  Please see bootstrap[], below, for the actual #ifdef mess.
- */
-extern AudioBootStrap PULSEAUDIO_bootstrap;
-extern AudioBootStrap ALSA_bootstrap;
-extern AudioBootStrap SNDIO_bootstrap;
-extern AudioBootStrap BSD_AUDIO_bootstrap;
-extern AudioBootStrap DSP_bootstrap;
-extern AudioBootStrap QSAAUDIO_bootstrap;
-extern AudioBootStrap SUNAUDIO_bootstrap;
-extern AudioBootStrap ARTS_bootstrap;
-extern AudioBootStrap ESD_bootstrap;
-extern AudioBootStrap NACLAUDIO_bootstrap;
-extern AudioBootStrap NAS_bootstrap;
-extern AudioBootStrap XAUDIO2_bootstrap;
-extern AudioBootStrap DSOUND_bootstrap;
-extern AudioBootStrap WINMM_bootstrap;
-extern AudioBootStrap PAUDIO_bootstrap;
-extern AudioBootStrap HAIKUAUDIO_bootstrap;
-extern AudioBootStrap COREAUDIO_bootstrap;
-extern AudioBootStrap DISKAUDIO_bootstrap;
-extern AudioBootStrap DUMMYAUDIO_bootstrap;
-extern AudioBootStrap FUSIONSOUND_bootstrap;
-extern AudioBootStrap ANDROIDAUDIO_bootstrap;
-extern AudioBootStrap PSPAUDIO_bootstrap;
-extern AudioBootStrap SNDIO_bootstrap;
-extern AudioBootStrap EMSCRIPTENAUDIO_bootstrap;
-
 /* Available audio drivers */
 static const AudioBootStrap *const bootstrap[] = {
 #if SDL_AUDIO_DRIVER_PULSEAUDIO
@@ -74,8 +44,8 @@ static const AudioBootStrap *const bootstrap[] = {
 #if SDL_AUDIO_DRIVER_SNDIO
     &SNDIO_bootstrap,
 #endif
-#if SDL_AUDIO_DRIVER_BSD
-    &BSD_AUDIO_bootstrap,
+#if SDL_AUDIO_DRIVER_NETBSD
+    &NETBSDAUDIO_bootstrap,
 #endif
 #if SDL_AUDIO_DRIVER_OSS
     &DSP_bootstrap,
@@ -98,8 +68,8 @@ static const AudioBootStrap *const bootstrap[] = {
 #if SDL_AUDIO_DRIVER_NAS
     &NAS_bootstrap,
 #endif
-#if SDL_AUDIO_DRIVER_XAUDIO2
-    &XAUDIO2_bootstrap,
+#if SDL_AUDIO_DRIVER_WASAPI
+    &WASAPI_bootstrap,
 #endif
 #if SDL_AUDIO_DRIVER_DSOUND
     &DSOUND_bootstrap,
@@ -116,12 +86,6 @@ static const AudioBootStrap *const bootstrap[] = {
 #if SDL_AUDIO_DRIVER_COREAUDIO
     &COREAUDIO_bootstrap,
 #endif
-#if SDL_AUDIO_DRIVER_DISK
-    &DISKAUDIO_bootstrap,
-#endif
-#if SDL_AUDIO_DRIVER_DUMMY
-    &DUMMYAUDIO_bootstrap,
-#endif
 #if SDL_AUDIO_DRIVER_FUSIONSOUND
     &FUSIONSOUND_bootstrap,
 #endif
@@ -133,10 +97,102 @@ static const AudioBootStrap *const bootstrap[] = {
 #endif
 #if SDL_AUDIO_DRIVER_EMSCRIPTEN
     &EMSCRIPTENAUDIO_bootstrap,
+#endif
+#if SDL_AUDIO_DRIVER_JACK
+    &JACK_bootstrap,
+#endif
+#if SDL_AUDIO_DRIVER_DISK
+    &DISKAUDIO_bootstrap,
+#endif
+#if SDL_AUDIO_DRIVER_DUMMY
+    &DUMMYAUDIO_bootstrap,
 #endif
     NULL
 };
 
+
+#ifdef HAVE_LIBSAMPLERATE_H
+#ifdef SDL_LIBSAMPLERATE_DYNAMIC
+static void *SRC_lib = NULL;
+#endif
+SDL_bool SRC_available = SDL_FALSE;
+int SRC_converter = 0;
+SRC_STATE* (*SRC_src_new)(int converter_type, int channels, int *error) = NULL;
+int (*SRC_src_process)(SRC_STATE *state, SRC_DATA *data) = NULL;
+int (*SRC_src_reset)(SRC_STATE *state) = NULL;
+SRC_STATE* (*SRC_src_delete)(SRC_STATE *state) = NULL;
+const char* (*SRC_src_strerror)(int error) = NULL;
+
+static SDL_bool
+LoadLibSampleRate(void)
+{
+    const char *hint = SDL_GetHint(SDL_HINT_AUDIO_RESAMPLING_MODE);
+
+    SRC_available = SDL_FALSE;
+    SRC_converter = 0;
+
+    if (!hint || *hint == '0' || SDL_strcasecmp(hint, "default") == 0) {
+        return SDL_FALSE;  /* don't load anything. */
+    } else if (*hint == '1' || SDL_strcasecmp(hint, "fast") == 0) {
+        SRC_converter = SRC_SINC_FASTEST;
+    } else if (*hint == '2' || SDL_strcasecmp(hint, "medium") == 0) {
+        SRC_converter = SRC_SINC_MEDIUM_QUALITY;
+    } else if (*hint == '3' || SDL_strcasecmp(hint, "best") == 0) {
+        SRC_converter = SRC_SINC_BEST_QUALITY;
+    } else {
+        return SDL_FALSE;  /* treat it like "default", don't load anything. */
+    }
+
+#ifdef SDL_LIBSAMPLERATE_DYNAMIC
+    SDL_assert(SRC_lib == NULL);
+    SRC_lib = SDL_LoadObject(SDL_LIBSAMPLERATE_DYNAMIC);
+    if (!SRC_lib) {
+        SDL_ClearError();
+        return SDL_FALSE;
+    }
+
+    SRC_src_new = (SRC_STATE* (*)(int converter_type, int channels, int *error))SDL_LoadFunction(SRC_lib, "src_new");
+    SRC_src_process = (int (*)(SRC_STATE *state, SRC_DATA *data))SDL_LoadFunction(SRC_lib, "src_process");
+    SRC_src_reset = (int(*)(SRC_STATE *state))SDL_LoadFunction(SRC_lib, "src_reset");
+    SRC_src_delete = (SRC_STATE* (*)(SRC_STATE *state))SDL_LoadFunction(SRC_lib, "src_delete");
+    SRC_src_strerror = (const char* (*)(int error))SDL_LoadFunction(SRC_lib, "src_strerror");
+
+    if (!SRC_src_new || !SRC_src_process || !SRC_src_reset || !SRC_src_delete || !SRC_src_strerror) {
+        SDL_UnloadObject(SRC_lib);
+        SRC_lib = NULL;
+        return SDL_FALSE;
+    }
+#else
+    SRC_src_new = src_new;
+    SRC_src_process = src_process;
+    SRC_src_reset = src_reset;
+    SRC_src_delete = src_delete;
+    SRC_src_strerror = src_strerror;
+#endif
+
+    SRC_available = SDL_TRUE;
+    return SDL_TRUE;
+}
+
+static void
+UnloadLibSampleRate(void)
+{
+#ifdef SDL_LIBSAMPLERATE_DYNAMIC
+    if (SRC_lib != NULL) {
+        SDL_UnloadObject(SRC_lib);
+    }
+    SRC_lib = NULL;
+#endif
+
+    SRC_available = SDL_FALSE;
+    SRC_src_new = NULL;
+    SRC_src_process = NULL;
+    SRC_src_reset = NULL;
+    SRC_src_delete = NULL;
+    SRC_src_strerror = NULL;
+}
+#endif
+
 static SDL_AudioDevice *
 get_audio_device(SDL_AudioDeviceID id)
 {
@@ -169,6 +225,16 @@ SDL_AudioThreadInit_Default(_THIS)
 {                               /* no-op. */
 }
 
+static void
+SDL_AudioThreadDeinit_Default(_THIS)
+{                               /* no-op. */
+}
+
+static void
+SDL_AudioBeginLoopIteration_Default(_THIS)
+{                               /* no-op. */
+}
+
 static void
 SDL_AudioWaitDevice_Default(_THIS)
 {                               /* no-op. */
@@ -288,6 +354,8 @@ finish_audio_entry_points_init(void)
     FILL_STUB(DetectDevices);
     FILL_STUB(OpenDevice);
     FILL_STUB(ThreadInit);
+    FILL_STUB(ThreadDeinit);
+    FILL_STUB(BeginLoopIteration);
     FILL_STUB(WaitDevice);
     FILL_STUB(PlayDevice);
     FILL_STUB(GetPendingBytes);
@@ -448,136 +516,23 @@ SDL_RemoveAudioDevice(const int iscapture, void *handle)
 
 /* buffer queueing support... */
 
-/* this expects that you managed thread safety elsewhere. */
-static void
-free_audio_queue(SDL_AudioBufferQueue *packet)
-{
-    while (packet) {
-        SDL_AudioBufferQueue *next = packet->next;
-        SDL_free(packet);
-        packet = next;
-    }
-}
-
-/* NOTE: This assumes you'll hold the mixer lock before calling! */
-static int
-queue_audio_to_device(SDL_AudioDevice *device, const Uint8 *data, Uint32 len)
-{
-    SDL_AudioBufferQueue *orighead;
-    SDL_AudioBufferQueue *origtail;
-    Uint32 origlen;
-    Uint32 datalen;
-
-    orighead = device->buffer_queue_head;
-    origtail = device->buffer_queue_tail;
-    origlen = origtail ? origtail->datalen : 0;
-
-    while (len > 0) {
-        SDL_AudioBufferQueue *packet = device->buffer_queue_tail;
-        SDL_assert(!packet || (packet->datalen <= SDL_AUDIOBUFFERQUEUE_PACKETLEN));
-        if (!packet || (packet->datalen >= SDL_AUDIOBUFFERQUEUE_PACKETLEN)) {
-            /* tail packet missing or completely full; we need a new packet. */
-            packet = device->buffer_queue_pool;
-            if (packet != NULL) {
-                /* we have one available in the pool. */
-                device->buffer_queue_pool = packet->next;
-            } else {
-                /* Have to allocate a new one! */
-                packet = (SDL_AudioBufferQueue *) SDL_malloc(sizeof (SDL_AudioBufferQueue));
-                if (packet == NULL) {
-                    /* uhoh, reset so we've queued nothing new, free what we can. */
-                    if (!origtail) {
-                        packet = device->buffer_queue_head;  /* whole queue. */
-                    } else {
-                        packet = origtail->next;  /* what we added to existing queue. */
-                        origtail->next = NULL;
-                        origtail->datalen = origlen;
-                    }
-                    device->buffer_queue_head = orighead;
-                    device->buffer_queue_tail = origtail;
-                    device->buffer_queue_pool = NULL;
-
-                    free_audio_queue(packet);  /* give back what we can. */
-
-                    return SDL_OutOfMemory();
-                }
-            }
-            packet->datalen = 0;
-            packet->startpos = 0;
-            packet->next = NULL;
-
-            SDL_assert((device->buffer_queue_head != NULL) == (device->queued_bytes != 0));
-            if (device->buffer_queue_tail == NULL) {
-                device->buffer_queue_head = packet;
-            } else {
-                device->buffer_queue_tail->next = packet;
-            }
-            device->buffer_queue_tail = packet;
-        }
-
-        datalen = SDL_min(len, SDL_AUDIOBUFFERQUEUE_PACKETLEN - packet->datalen);
-        SDL_memcpy(packet->data + packet->datalen, data, datalen);
-        data += datalen;
-        len -= datalen;
-        packet->datalen += datalen;
-        device->queued_bytes += datalen;
-    }
-
-    return 0;
-}
-
-/* NOTE: This assumes you'll hold the mixer lock before calling! */
-static Uint32
-dequeue_audio_from_device(SDL_AudioDevice *device, Uint8 *stream, Uint32 len)
-{
-    SDL_AudioBufferQueue *packet;
-    Uint8 *ptr = stream;
-
-    while ((len > 0) && ((packet = device->buffer_queue_head) != NULL)) {
-        const Uint32 avail = packet->datalen - packet->startpos;
-        const Uint32 cpy = SDL_min(len, avail);
-        SDL_assert(device->queued_bytes >= avail);
-
-        SDL_memcpy(ptr, packet->data + packet->startpos, cpy);
-        packet->startpos += cpy;
-        ptr += cpy;
-        device->queued_bytes -= cpy;
-        len -= cpy;
-
-        if (packet->startpos == packet->datalen) {  /* packet is done, put it in the pool. */
-            device->buffer_queue_head = packet->next;
-            SDL_assert((packet->next != NULL) || (packet == device->buffer_queue_tail));
-            packet->next = device->buffer_queue_pool;
-            device->buffer_queue_pool = packet;
-        }
-    }
-
-    SDL_assert((device->buffer_queue_head != NULL) == (device->queued_bytes != 0));
-
-    if (device->buffer_queue_head == NULL) {
-        device->buffer_queue_tail = NULL;  /* in case we drained the queue entirely. */
-    }
-
-    return (Uint32) (ptr - stream);
-}
-
 static void SDLCALL
 SDL_BufferQueueDrainCallback(void *userdata, Uint8 *stream, int len)
 {
     /* this function always holds the mixer lock before being called. */
     SDL_AudioDevice *device = (SDL_AudioDevice *) userdata;
-    Uint32 written;
+    size_t dequeued;
 
     SDL_assert(device != NULL);  /* this shouldn't ever happen, right?! */
     SDL_assert(!device->iscapture);  /* this shouldn't ever happen, right?! */
     SDL_assert(len >= 0);  /* this shouldn't ever happen, right?! */
 
-    written = dequeue_audio_from_device(device, stream, (Uint32) len);
-    stream += written;
-    len -= (int) written;
+    dequeued = SDL_ReadFromDataQueue(device->buffer_queue, stream, len);
+    stream += dequeued;
+    len -= (int) dequeued;
 
     if (len > 0) {  /* fill any remaining space in the stream with silence. */
-        SDL_assert(device->buffer_queue_head == NULL);
+        SDL_assert(SDL_CountDataQueue(device->buffer_queue) == 0);
         SDL_memset(stream, device->spec.silence, len);
     }
 }
@@ -595,7 +550,7 @@ SDL_BufferQueueFillCallback(void *userdata, Uint8 *stream, int len)
     /* note that if this needs to allocate more space and run out of memory,
        we have no choice but to quietly drop the data and hope it works out
        later, but you probably have bigger problems in this case anyhow. */
-    queue_audio_to_device(device, stream, (Uint32) len);
+    SDL_WriteToDataQueue(device->buffer_queue, stream, len);
 }
 
 int
@@ -608,13 +563,13 @@ SDL_QueueAudio(SDL_AudioDeviceID devid, const void *data, Uint32 len)
         return -1;  /* get_audio_device() will have set the error state */
     } else if (device->iscapture) {
         return SDL_SetError("This is a capture device, queueing not allowed");
-    } else if (device->spec.callback != SDL_BufferQueueDrainCallback) {
+    } else if (device->callbackspec.callback != SDL_BufferQueueDrainCallback) {
         return SDL_SetError("Audio device has a callback, queueing not allowed");
     }
 
     if (len > 0) {
         current_audio.impl.LockDevice(device);
-        rc = queue_audio_to_device(device, data, len);
+        rc = SDL_WriteToDataQueue(device->buffer_queue, data, len);
         current_audio.impl.UnlockDevice(device);
     }
 
@@ -630,12 +585,12 @@ SDL_DequeueAudio(SDL_AudioDeviceID devid, void *data, Uint32 len)
     if ( (len == 0) ||  /* nothing to do? */
          (!device) ||  /* called with bogus device id */
          (!device->iscapture) ||  /* playback devices can't dequeue */
-         (device->spec.callback != SDL_BufferQueueFillCallback) ) { /* not set for queueing */
+         (device->callbackspec.callback != SDL_BufferQueueFillCallback) ) { /* not set for queueing */
         return 0;  /* just report zero bytes dequeued. */
     }
 
     current_audio.impl.LockDevice(device);
-    rc = dequeue_audio_from_device(device, data, len);
+    rc = (Uint32) SDL_ReadFromDataQueue(device->buffer_queue, data, len);
     current_audio.impl.UnlockDevice(device);
     return rc;
 }
@@ -651,13 +606,13 @@ SDL_GetQueuedAudioSize(SDL_AudioDeviceID devid)
     }
 
     /* Nothing to do unless we're set up for queueing. */
-    if (device->spec.callback == SDL_BufferQueueDrainCallback) {
+    if (device->callbackspec.callback == SDL_BufferQueueDrainCallback) {
         current_audio.impl.LockDevice(device);
-        retval = device->queued_bytes + current_audio.impl.GetPendingBytes(device);
+        retval = ((Uint32) SDL_CountDataQueue(device->buffer_queue)) + current_audio.impl.GetPendingBytes(device);
         current_audio.impl.UnlockDevice(device);
-    } else if (device->spec.callback == SDL_BufferQueueFillCallback) {
+    } else if (device->callbackspec.callback == SDL_BufferQueueFillCallback) {
         current_audio.impl.LockDevice(device);
-        retval = device->queued_bytes;
+        retval = (Uint32) SDL_CountDataQueue(device->buffer_queue);
         current_audio.impl.UnlockDevice(device);
     }
 
@@ -668,7 +623,6 @@ void
 SDL_ClearQueuedAudio(SDL_AudioDeviceID devid)
 {
     SDL_AudioDevice *device = get_audio_device(devid);
-    SDL_AudioBufferQueue *packet;
 
     if (!device) {
         return;  /* nothing to do. */
@@ -677,35 +631,10 @@ SDL_ClearQueuedAudio(SDL_AudioDeviceID devid)
     /* Blank out the device and release the mutex. Free it afterwards. */
     current_audio.impl.LockDevice(device);
 
-    /* merge the available pool and the current queue into one list. */
-    packet = device->buffer_queue_head;
-    if (packet) {
-        device->buffer_queue_tail->next = device->buffer_queue_pool;
-    } else {
-        packet = device->buffer_queue_pool;
-    }
-
-    /* Remove the queued packets from the device. */
-    device->buffer_queue_tail = NULL;
-    device->buffer_queue_head = NULL;
-    device->queued_bytes = 0;
-    device->buffer_queue_pool = packet;
-
     /* Keep up to two packets in the pool to reduce future malloc pressure. */
-    if (packet) {
-        if (!packet->next) {
-            packet = NULL;  /* one packet (the only one) for the pool. */
-        } else {
-            SDL_AudioBufferQueue *next = packet->next->next;
-            packet->next->next = NULL;  /* two packets for the pool. */
-            packet = next;  /* rest will be freed. */
-        }
-    }
+    SDL_ClearDataQueue(device->buffer_queue, SDL_AUDIOBUFFERQUEUE_PACKETLEN * 2);
 
     current_audio.impl.UnlockDevice(device);
-
-    /* free any extra packets we didn't keep in the pool. */
-    free_audio_queue(packet);
 }
 
 
@@ -714,12 +643,10 @@ static int SDLCALL
 SDL_RunAudio(void *devicep)
 {
     SDL_AudioDevice *device = (SDL_AudioDevice *) devicep;
-    const int silence = (int) device->spec.silence;
-    const Uint32 delay = ((device->spec.samples * 1000) / device->spec.freq);
-    const int stream_len = (device->convert.needed) ? device->convert.len : device->spec.size;
-    Uint8 *stream;
-    void *udata = device->spec.userdata;
-    void (SDLCALL *callback) (void *, Uint8 *, int) = device->spec.callback;
+    void *udata = device->callbackspec.userdata;
+    SDL_AudioCallback callback = device->callbackspec.callback;
+    int data_len = 0;
+    Uint8 *data;
 
     SDL_assert(!device->iscapture);
 
@@ -732,51 +659,64 @@ SDL_RunAudio(void *devicep)
 
     /* Loop, filling the audio buffers */
     while (!SDL_AtomicGet(&device->shutdown)) {
+        current_audio.impl.BeginLoopIteration(device);
+        data_len = device->callbackspec.size;
+
         /* Fill the current buffer with sound */
-        if (device->convert.needed) {
-            stream = device->convert.buf;
-        } else if (SDL_AtomicGet(&device->enabled)) {
-            stream = current_audio.impl.GetDeviceBuf(device);
+        if (!device->stream && SDL_AtomicGet(&device->enabled)) {
+            SDL_assert(data_len == device->spec.size);
+            data = current_audio.impl.GetDeviceBuf(device);
         } else {
             /* if the device isn't enabled, we still write to the
-               fake_stream, so the app's callback will fire with
+               work_buffer, so the app's callback will fire with
                a regular frequency, in case they depend on that
                for timing or progress. They can use hotplug
-               now to know if the device failed. */
-            stream = NULL;
+               now to know if the device failed.
+               Streaming playback uses work_buffer, too. */
+            data = NULL;
         }
 
-        if (stream == NULL) {
-            stream = device->fake_stream;
+        if (data == NULL) {
+            data = device->work_buffer;
         }
 
         /* !!! FIXME: this should be LockDevice. */
-        if ( SDL_AtomicGet(&device->enabled) ) {
-            SDL_LockMutex(device->mixer_lock);
-            if (SDL_AtomicGet(&device->paused)) {
-                SDL_memset(stream, silence, stream_len);
-            } else {
-                (*callback) (udata, stream, stream_len);
-            }
-            SDL_UnlockMutex(device->mixer_lock);
-        }
-
-        /* Convert the audio if necessary */
-        if (device->convert.needed && SDL_AtomicGet(&device->enabled)) {
-            SDL_ConvertAudio(&device->convert);
-            stream = current_audio.impl.GetDeviceBuf(device);
-            if (stream == NULL) {
-                stream = device->fake_stream;
-            } else {
-                SDL_memcpy(stream, device->convert.buf,
-                           device->convert.len_cvt);
-            }
-        }
-
-        /* Ready current buffer for play and change current buffer */
-        if (stream == device->fake_stream) {
-            SDL_Delay(delay);
+        SDL_LockMutex(device->mixer_lock);
+        if (SDL_AtomicGet(&device->paused)) {
+            SDL_memset(data, device->spec.silence, data_len);
         } else {
+            callback(udata, data, data_len);
+        }
+        SDL_UnlockMutex(device->mixer_lock);
+
+        if (device->stream) {
+            /* Stream available audio to device, converting/resampling. */
+            /* if this fails...oh well. We'll play silence here. */
+            SDL_AudioStreamPut(device->stream, data, data_len);
+
+            while (SDL_AudioStreamAvailable(device->stream) >= ((int) device->spec.size)) {
+                int got;
+                data = SDL_AtomicGet(&device->enabled) ? current_audio.impl.GetDeviceBuf(device) : NULL;
+                got = SDL_AudioStreamGet(device->stream, data ? data : device->work_buffer, device->spec.size);
+                SDL_assert((got < 0) || (got == device->spec.size));
+
+                if (data == NULL) {  /* device is having issues... */
+                    const Uint32 delay = ((device->spec.samples * 1000) / device->spec.freq);
+                    SDL_Delay(delay);  /* wait for as long as this buffer would have played. Maybe device recovers later? */
+                } else {
+                    if (got != device->spec.size) {
+                        SDL_memset(data, device->spec.silence, device->spec.size);
+                    }
+                    current_audio.impl.PlayDevice(device);
+                    current_audio.impl.WaitDevice(device);
+                }
+            }
+        } else if (data == device->work_buffer) {
+            /* nothing to do; pause like we queued a buffer to play. */
+            const Uint32 delay = ((device->spec.samples * 1000) / device->spec.freq);
+            SDL_Delay(delay);
+        } else {  /* writing directly to the device. */
+            /* queue this buffer and wait for it to finish playing. */
             current_audio.impl.PlayDevice(device);
             current_audio.impl.WaitDevice(device);
         }
@@ -787,9 +727,12 @@ SDL_RunAudio(void *devicep)
     /* Wait for the audio to drain. */
     SDL_Delay(((device->spec.samples * 1000) / device->spec.freq) * 2);
 
+    current_audio.impl.ThreadDeinit(device);
+
     return 0;
 }
 
+/* !!! FIXME: this needs to deal with device spec changes. */
 /* The general capture thread function */
 static int SDLCALL
 SDL_CaptureAudio(void *devicep)
@@ -797,10 +740,10 @@ SDL_CaptureAudio(void *devicep)
     SDL_AudioDevice *device = (SDL_AudioDevice *) devicep;
     const int silence = (int) device->spec.silence;
     const Uint32 delay = ((device->spec.samples * 1000) / device->spec.freq);
-    const int stream_len = (device->convert.needed) ? device->convert.len : device->spec.size;
-    Uint8 *stream;
-    void *udata = device->spec.userdata;
-    void (SDLCALL *callback) (void *, Uint8 *, int) = device->spec.callback;
+    const int data_len = device->spec.size;
+    Uint8 *data;
+    void *udata = device->callbackspec.userdata;
+    SDL_AudioCallback callback = device->callbackspec.callback;
 
     SDL_assert(device->iscapture);
 
@@ -816,34 +759,43 @@ SDL_CaptureAudio(void *devicep)
         int still_need;
         Uint8 *ptr;
 
-        if (!SDL_AtomicGet(&device->enabled) || SDL_AtomicGet(&device->paused)) {
+        current_audio.impl.BeginLoopIteration(device);
+
+        if (SDL_AtomicGet(&device->paused)) {
             SDL_Delay(delay);  /* just so we don't cook the CPU. */
+            if (device->stream) {
+                SDL_AudioStreamClear(device->stream);
+            }
             current_audio.impl.FlushCapture(device);  /* dump anything pending. */
             continue;
         }
 
         /* Fill the current buffer with sound */
-        still_need = stream_len;
-        if (device->convert.needed) {
-            ptr = stream = device->convert.buf;
-        } else {
-            /* just use the "fake" stream to hold data read from the device. */
-            ptr = stream = device->fake_stream;
-        }
+        still_need = data_len;
+
+        /* Use the work_buffer to hold data read from the device. */
+        data = device->work_buffer;
+        SDL_assert(data != NULL);
+
+        ptr = data;
 
         /* We still read from the device when "paused" to keep the state sane,
            and block when there isn't data so this thread isn't eating CPU.
            But we don't process it further or call the app's callback. */
 
-        while (still_need > 0) {
-            const int rc = current_audio.impl.CaptureFromDevice(device, ptr, still_need);
-            SDL_assert(rc <= still_need);  /* device should not overflow buffer. :) */
-            if (rc > 0) {
-                still_need -= rc;
-                ptr += rc;
-            } else {  /* uhoh, device failed for some reason! */
-                SDL_OpenedAudioDeviceDisconnected(device);
-                break;
+        if (!SDL_AtomicGet(&device->enabled)) {
+            SDL_Delay(delay);  /* try to keep callback firing at normal pace. */
+        } else {
+            while (still_need > 0) {
+                const int rc = current_audio.impl.CaptureFromDevice(device, ptr, still_need);
+                SDL_assert(rc <= still_need);  /* device should not overflow buffer. :) */
+                if (rc > 0) {
+                    still_need -= rc;
+                    ptr += rc;
+                } else {  /* uhoh, device failed for some reason! */
+                    SDL_OpenedAudioDeviceDisconnected(device);
+                    break;
+                }
             }
         }
 
@@ -852,22 +804,38 @@ SDL_CaptureAudio(void *devicep)
             SDL_memset(ptr, silence, still_need);
         }
 
-        if (device->convert.needed) {
-            SDL_ConvertAudio(&device->convert);
-        }
+        if (device->stream) {
+            /* if this fails...oh well. */
+            SDL_AudioStreamPut(device->stream, data, data_len);
 
-        /* !!! FIXME: this should be LockDevice. */
-        SDL_LockMutex(device->mixer_lock);
-        if (SDL_AtomicGet(&device->paused)) {
-            current_audio.impl.FlushCapture(device);  /* one snuck in! */
-        } else {
-            (*callback)(udata, stream, stream_len);
+            while (SDL_AudioStreamAvailable(device->stream) >= ((int) device->callbackspec.size)) {
+                const int got = SDL_AudioStreamGet(device->stream, device->work_buffer, device->callbackspec.size);
+                SDL_assert((got < 0) || (got == device->callbackspec.size));
+                if (got != device->callbackspec.size) {
+                    SDL_memset(device->work_buffer, device->spec.silence, device->callbackspec.size);
+                }
+
+                /* !!! FIXME: this should be LockDevice. */
+                SDL_LockMutex(device->mixer_lock);
+                if (!SDL_AtomicGet(&device->paused)) {
+                    callback(udata, device->work_buffer, device->callbackspec.size);
+                }
+                SDL_UnlockMutex(device->mixer_lock);
+            }
+        } else {  /* feeding user callback directly without streaming. */
+            /* !!! FIXME: this should be LockDevice. */
+            SDL_LockMutex(device->mixer_lock);
+            if (!SDL_AtomicGet(&device->paused)) {
+                callback(udata, data, device->callbackspec.size);
+            }
+            SDL_UnlockMutex(device->mixer_lock);
         }
-        SDL_UnlockMutex(device->mixer_lock);
     }
 
     current_audio.impl.FlushCapture(device);
 
+    current_audio.impl.ThreadDeinit(device);
+
     return 0;
 }
 
@@ -968,6 +936,10 @@ SDL_AudioInit(const char *driver_name)
     /* Make sure we have a list of devices available at startup. */
     current_audio.impl.DetectDevices();
 
+#ifdef HAVE_LIBSAMPLERATE_H
+    LoadLibSampleRate();
+#endif
+
     return 0;
 }
 
@@ -1098,16 +1070,15 @@ close_audio_device(SDL_AudioDevice * device)
     if (device->mixer_lock != NULL) {
         SDL_DestroyMutex(device->mixer_lock);
     }
-    SDL_free(device->fake_stream);
-    if (device->convert.needed) {
-        SDL_free(device->convert.buf);
-    }
+
+    SDL_free(device->work_buffer);
+    SDL_FreeAudioStream(device->stream);
+
     if (device->hidden != NULL) {
         current_audio.impl.CloseDevice(device);
     }
 
-    free_audio_queue(device->buffer_queue_head);
-    free_audio_queue(device->buffer_queue_pool);
+    SDL_FreeDataQueue(device->buffer_queue);
 
     SDL_free(device);
 }
@@ -1180,11 +1151,11 @@ open_audio_device(const char *devname, int iscapture,
                   const SDL_AudioSpec * desired, SDL_AudioSpec * obtained,
                   int allowed_changes, int min_id)
 {
-    const SDL_bool is_internal_thread = (desired->callback != NULL);
+    const SDL_bool is_internal_thread = (desired->callback == NULL);
     SDL_AudioDeviceID id = 0;
     SDL_AudioSpec _obtained;
     SDL_AudioDevice *device;
-    SDL_bool build_cvt;
+    SDL_bool build_stream;
     void *handle = NULL;
     int i = 0;
 
@@ -1319,84 +1290,87 @@ open_audio_device(const char *devname, int iscapture,
     SDL_assert(device->hidden != NULL);
 
     /* See if we need to do any conversion */
-    build_cvt = SDL_FALSE;
+    build_stream = SDL_FALSE;
     if (obtained->freq != device->spec.freq) {
         if (allowed_changes & SDL_AUDIO_ALLOW_FREQUENCY_CHANGE) {
             obtained->freq = device->spec.freq;
         } else {
-            build_cvt = SDL_TRUE;
+            build_stream = SDL_TRUE;
         }
     }
     if (obtained->format != device->spec.format) {
         if (allowed_changes & SDL_AUDIO_ALLOW_FORMAT_CHANGE) {
             obtained->format = device->spec.format;
         } else {
-            build_cvt = SDL_TRUE;
+            build_stream = SDL_TRUE;
         }
     }
     if (obtained->channels != device->spec.channels) {
         if (allowed_changes & SDL_AUDIO_ALLOW_CHANNELS_CHANGE) {
             obtained->channels = device->spec.channels;
         } else {
-            build_cvt = SDL_TRUE;
+            build_stream = SDL_TRUE;
         }
     }
 
-    /* If the audio driver changes the buffer size, accept it.
-       This needs to be done after the format is modified above,
-       otherwise it might not have the correct buffer size.
+    /* !!! FIXME in 2.1: add SDL_AUDIO_ALLOW_SAMPLES_CHANGE flag?
+       As of 2.0.6, we will build a stream to buffer the difference between
+       what the app wants to feed and the device wants to eat, so everyone
+       gets their way. In prior releases, SDL would force the callback to
+       feed at the rate the device requested, adjusted for resampling.
      */
     if (device->spec.samples != obtained->samples) {
-        obtained->samples = device->spec.samples;
-        SDL_CalculateAudioSpec(obtained);
+        build_stream = SDL_TRUE;
     }
 
-    if (build_cvt) {
-        /* Build an audio conversion block */
-        if (SDL_BuildAudioCVT(&device->convert,
-                              obtained->format, obtained->channels,
-                              obtained->freq,
-                              device->spec.format, device->spec.channels,
-                              device->spec.freq) < 0) {
+    SDL_CalculateAudioSpec(obtained);  /* recalc after possible changes. */
+
+    device->callbackspec = *obtained;
+
+    if (build_stream) {
+        if (iscapture) {
+            device->stream = SDL_NewAudioStream(device->spec.format,
+                                  device->spec.channels, device->spec.freq,
+                                  obtained->format, obtained->channels, obtained->freq);
+        } else {
+            device->stream = SDL_NewAudioStream(obtained->format, obtained->channels,
+                                  obtained->freq, device->spec.format,
+                                  device->spec.channels, device->spec.freq);
+        }
+
+        if (!device->stream) {
             close_audio_device(device);
             return 0;
         }
-        if (device->convert.needed) {
-            device->convert.len = (int) (((double) device->spec.size) /
-                                         device->convert.len_ratio);
-
-            device->convert.buf =
-                (Uint8 *) SDL_malloc(device->convert.len *
-                                            device->convert.len_mult);
-            if (device->convert.buf == NULL) {
-                close_audio_device(device);
-                SDL_OutOfMemory();
-                return 0;
-            }
-        }
     }
 
     if (device->spec.callback == NULL) {  /* use buffer queueing? */
         /* pool a few packets to start. Enough for two callbacks. */
-        const int packetlen = SDL_AUDIOBUFFERQUEUE_PACKETLEN;
-        const int wantbytes = ((device->convert.needed) ? device->convert.len : device->spec.size) * 2;
-        const int wantpackets = (wantbytes / packetlen) + ((wantbytes % packetlen) ? packetlen : 0);
-        for (i = 0; i < wantpackets; i++) {
-            SDL_AudioBufferQueue *packet = (SDL_AudioBufferQueue *) SDL_malloc(sizeof (SDL_AudioBufferQueue));
-            if (packet) { /* don't care if this fails, we'll deal later. */
-                packet->datalen = 0;
-                packet->startpos = 0;
-                packet->next = device->buffer_queue_pool;
-                device->buffer_queue_pool = packet;
-            }
+        device->buffer_queue = SDL_NewDataQueue(SDL_AUDIOBUFFERQUEUE_PACKETLEN, obtained->size * 2);
+        if (!device->buffer_queue) {
+            close_audio_device(device);
+            SDL_SetError("Couldn't create audio buffer queue");
+            return 0;
         }
-
-        device->spec.callback = iscapture ? SDL_BufferQueueFillCallback : SDL_BufferQueueDrainCallback;
-        device->spec.userdata = device;
+        device->callbackspec.callback = iscapture ? SDL_BufferQueueFillCallback : SDL_BufferQueueDrainCallback;
+        device->callbackspec.userdata = device;
     }
 
-    /* add it to our list of open devices. */
-    open_devices[id] = device;
+    /* Allocate a scratch audio buffer */
+    device->work_buffer_len = build_stream ? device->callbackspec.size : 0;
+    if (device->spec.size > device->work_buffer_len) {
+        device->work_buffer_len = device->spec.size;
+    }
+    SDL_assert(device->work_buffer_len > 0);
+
+    device->work_buffer = (Uint8 *) SDL_malloc(device->work_buffer_len);
+    if (device->work_buffer == NULL) {
+        close_audio_device(device);
+        SDL_OutOfMemory();
+        return 0;
+    }
+
+    open_devices[id] = device;  /* add it to our list of open devices. */
 
     /* Start the audio thread if necessary */
     if (!current_audio.impl.ProvidesOwnCallbackThread) {
@@ -1406,21 +1380,7 @@ open_audio_device(const char *devname, int iscapture,
         const size_t stacksize = is_internal_thread ? 64 * 1024 : 0;
         char threadname[64];
 
-        /* Allocate a fake audio buffer; only used by our internal threads. */
-        Uint32 stream_len = (device->convert.needed) ? device->convert.len_cvt : 0;
-        if (device->spec.size > stream_len) {
-            stream_len = device->spec.size;
-        }
-        SDL_assert(stream_len > 0);
-
-        device->fake_stream = (Uint8 *) SDL_malloc(stream_len);
-        if (device->fake_stream == NULL) {
-            close_audio_device(device);
-            SDL_OutOfMemory();
-            return 0;
-        }
-
-        SDL_snprintf(threadname, sizeof (threadname), "SDLAudioDev%d", (int) device->id);
+        SDL_snprintf(threadname, sizeof (threadname), "SDLAudio%c%d", (iscapture) ? 'C' : 'P', (int) device->id);
         device->thread = SDL_CreateThreadInternal(iscapture ? SDL_CaptureAudio : SDL_RunAudio, threadname, stacksize, device);
 
         if (device->thread == NULL) {
@@ -1456,7 +1416,14 @@ SDL_OpenAudio(SDL_AudioSpec * desired, SDL_AudioSpec * obtained)
         id = open_audio_device(NULL, 0, desired, obtained,
                                SDL_AUDIO_ALLOW_ANY_CHANGE, 1);
     } else {
-        id = open_audio_device(NULL, 0, desired, NULL, 0, 1);
+        SDL_AudioSpec _obtained;
+        SDL_zero(_obtained);
+        id = open_audio_device(NULL, 0, desired, &_obtained, 0, 1);
+        /* On successful open, copy calculated values into 'desired'. */
+        if (id > 0) {
+            desired->size = _obtained.size;
+            desired->silence = _obtained.silence;
+        }
     }
 
     SDL_assert((id == 0) || (id == 1));
@@ -1579,6 +1546,12 @@ SDL_AudioQuit(void)
 
     SDL_zero(current_audio);
     SDL_zero(open_devices);
+
+#ifdef HAVE_LIBSAMPLERATE_H
+    UnloadLibSampleRate();
+#endif
+
+    SDL_FreeResampleFilter();
 }
 
 #define NUM_FORMATS 10
@@ -1655,13 +1628,7 @@ SDL_MixAudio(Uint8 * dst, const Uint8 * src, Uint32 len, int volume)
     /* Mix the user-level audio format */
     SDL_AudioDevice *device = get_audio_device(1);
     if (device != NULL) {
-        SDL_AudioFormat format;
-        if (device->convert.needed) {
-            format = device->convert.src_format;
-        } else {
-            format = device->spec.format;
-        }
-        SDL_MixAudioFormat(dst, src, format, len, volume);
+        SDL_MixAudioFormat(dst, src, device->callbackspec.format, len, volume);
     }
 }
 

Engine/lib/sdl/src/audio/SDL_audio_c.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -18,10 +18,35 @@
      misrepresented as being the original software.
   3. This notice may not be removed or altered from any source distribution.
 */
+
+#ifndef SDL_audio_c_h_
+#define SDL_audio_c_h_
+
 #include "../SDL_internal.h"
 
+#ifndef DEBUG_CONVERT
+#define DEBUG_CONVERT 0
+#endif
+
+#if DEBUG_CONVERT
+#define LOG_DEBUG_CONVERT(from, to) fprintf(stderr, "Converting %s to %s.\n", from, to);
+#else
+#define LOG_DEBUG_CONVERT(from, to)
+#endif
+
 /* Functions and variables exported from SDL_audio.c for SDL_sysaudio.c */
 
+#ifdef HAVE_LIBSAMPLERATE_H
+#include "samplerate.h"
+extern SDL_bool SRC_available;
+extern int SRC_converter;
+extern SRC_STATE* (*SRC_src_new)(int converter_type, int channels, int *error);
+extern int (*SRC_src_process)(SRC_STATE *state, SRC_DATA *data);
+extern int (*SRC_src_reset)(SRC_STATE *state);
+extern SRC_STATE* (*SRC_src_delete)(SRC_STATE *state);
+extern const char* (*SRC_src_strerror)(int error);
+#endif
+
 /* Functions to get a list of "close" audio formats */
 extern SDL_AudioFormat SDL_FirstAudioFormat(SDL_AudioFormat format);
 extern SDL_AudioFormat SDL_NextAudioFormat(void);
@@ -29,24 +54,26 @@ extern SDL_AudioFormat SDL_NextAudioFormat(void);
 /* Function to calculate the size and silence for a SDL_AudioSpec */
 extern void SDL_CalculateAudioSpec(SDL_AudioSpec * spec);
 
-/* this is used internally to access some autogenerated code. */
-typedef struct
-{
-    SDL_AudioFormat src_fmt;
-    SDL_AudioFormat dst_fmt;
-    SDL_AudioFilter filter;
-} SDL_AudioTypeFilters;
-extern const SDL_AudioTypeFilters sdl_audio_type_filters[];
+/* Choose the audio filter functions below */
+extern void SDL_ChooseAudioConverters(void);
 
-/* this is used internally to access some autogenerated code. */
-typedef struct
-{
-    SDL_AudioFormat fmt;
-    int channels;
-    int upsample;
-    int multiple;
-    SDL_AudioFilter filter;
-} SDL_AudioRateFilters;
-extern const SDL_AudioRateFilters sdl_audio_rate_filters[];
+/* These pointers get set during SDL_ChooseAudioConverters() to various SIMD implementations. */
+extern SDL_AudioFilter SDL_Convert_S8_to_F32;
+extern SDL_AudioFilter SDL_Convert_U8_to_F32;
+extern SDL_AudioFilter SDL_Convert_S16_to_F32;
+extern SDL_AudioFilter SDL_Convert_U16_to_F32;
+extern SDL_AudioFilter SDL_Convert_S32_to_F32;
+extern SDL_AudioFilter SDL_Convert_F32_to_S8;
+extern SDL_AudioFilter SDL_Convert_F32_to_U8;
+extern SDL_AudioFilter SDL_Convert_F32_to_S16;
+extern SDL_AudioFilter SDL_Convert_F32_to_U16;
+extern SDL_AudioFilter SDL_Convert_F32_to_S32;
+
+/* You need to call SDL_PrepareResampleFilter() before using the internal resampler.
+   SDL_AudioQuit() calls SDL_FreeResamplerFilter(), you should never call it yourself. */
+extern int SDL_PrepareResampleFilter(void);
+extern void SDL_FreeResampleFilter(void);
+
+#endif /* SDL_audio_c_h_ */
 
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/SDL_audiodev.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -22,7 +22,7 @@
 
 /* Get the name of the audio device we use for output */
 
-#if SDL_AUDIO_DRIVER_BSD || SDL_AUDIO_DRIVER_OSS || SDL_AUDIO_DRIVER_SUNAUDIO
+#if SDL_AUDIO_DRIVER_NETBSD || SDL_AUDIO_DRIVER_OSS || SDL_AUDIO_DRIVER_SUNAUDIO
 
 #include <fcntl.h>
 #include <sys/types.h>
@@ -103,9 +103,10 @@ SDL_EnumUnixAudioDevices_Internal(const int iscapture, const int classic, int (*
 
     if (SDL_strlen(audiodev) < (sizeof(audiopath) - 3)) {
         int instance = 0;
-        while (instance++ <= 64) {
+        while (instance <= 64) {
             SDL_snprintf(audiopath, SDL_arraysize(audiopath),
                          "%s%d", audiodev, instance);
+            instance++;
             test_device(iscapture, audiopath, flags, test);
         }
     }

Engine/lib/sdl/src/audio/SDL_audiodev_c.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages

Engine/lib/sdl/src/audio/SDL_mixer.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages

Engine/lib/sdl/src/audio/SDL_sysaudio.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -20,11 +20,13 @@
 */
 #include "../SDL_internal.h"
 
-#ifndef _SDL_sysaudio_h
-#define _SDL_sysaudio_h
+#ifndef SDL_sysaudio_h_
+#define SDL_sysaudio_h_
 
 #include "SDL_mutex.h"
 #include "SDL_thread.h"
+#include "../SDL_dataqueue.h"
+#include "./SDL_audio_c.h"
 
 /* !!! FIXME: These are wordy and unlocalized... */
 #define DEFAULT_OUTPUT_DEVNAME "System audio output device"
@@ -49,7 +51,6 @@ extern void SDL_RemoveAudioDevice(const int iscapture, void *handle);
    as appropriate so SDL's list of devices is accurate. */
 extern void SDL_OpenedAudioDeviceDisconnected(SDL_AudioDevice *device);
 
-
 /* This is the size of a packet when using SDL_QueueAudio(). We allocate
    these as necessary and pool them, under the assumption that we'll
    eventually end up with a handful that keep recycling, meeting whatever
@@ -61,20 +62,13 @@ extern void SDL_OpenedAudioDeviceDisconnected(SDL_AudioDevice *device);
    The system preallocates enough packets for 2 callbacks' worth of data. */
 #define SDL_AUDIOBUFFERQUEUE_PACKETLEN (8 * 1024)
 
-/* Used by apps that queue audio instead of using the callback. */
-typedef struct SDL_AudioBufferQueue
-{
-    Uint8 data[SDL_AUDIOBUFFERQUEUE_PACKETLEN];  /* packet data. */
-    Uint32 datalen;  /* bytes currently in use in this packet. */
-    Uint32 startpos;  /* bytes currently consumed in this packet. */
-    struct SDL_AudioBufferQueue *next;  /* next item in linked list. */
-} SDL_AudioBufferQueue;
-
 typedef struct SDL_AudioDriverImpl
 {
     void (*DetectDevices) (void);
     int (*OpenDevice) (_THIS, void *handle, const char *devname, int iscapture);
     void (*ThreadInit) (_THIS); /* Called by audio thread at start */
+    void (*ThreadDeinit) (_THIS); /* Called by audio thread at end */
+    void (*BeginLoopIteration)(_THIS);  /* Called by audio thread at top of loop */
     void (*WaitDevice) (_THIS);
     void (*PlayDevice) (_THIS);
     int (*GetPendingBytes) (_THIS);
@@ -105,11 +99,7 @@ typedef struct SDL_AudioDeviceItem
 {
     void *handle;
     struct SDL_AudioDeviceItem *next;
-    #if (defined(__GNUC__) && (__GNUC__ <= 2))
-    char name[1];  /* actually variable length. */
-    #else
-    char name[];
-    #endif
+    char name[SDL_VARIABLE_LENGTH_ARRAY];
 } SDL_AudioDeviceItem;
 
 
@@ -136,15 +126,6 @@ typedef struct SDL_AudioDriver
 } SDL_AudioDriver;
 
 
-/* Streamer */
-typedef struct
-{
-    Uint8 *buffer;
-    int max_len;                /* the maximum length in bytes */
-    int read_pos, write_pos;    /* the position of the write and read heads in bytes */
-} SDL_AudioStreamer;
-
-
 /* Define the SDL audio driver structure */
 struct SDL_AudioDevice
 {
@@ -152,15 +133,14 @@ struct SDL_AudioDevice
     /* Data common to all devices */
     SDL_AudioDeviceID id;
 
-    /* The current audio specification (shared with audio thread) */
+    /* The device's current audio specification */
     SDL_AudioSpec spec;
 
-    /* An audio conversion block for audio format emulation */
-    SDL_AudioCVT convert;
+    /* The callback's expected audio specification (converted vs device's spec). */
+    SDL_AudioSpec callbackspec;
 
-    /* The streamer, if sample rate conversion necessitates it */
-    int use_streamer;
-    SDL_AudioStreamer streamer;
+    /* Stream that converts and resamples. NULL if not needed. */
+    SDL_AudioStream *stream;
 
     /* Current state flags */
     SDL_atomic_t shutdown; /* true if we are signaling the play thread to end. */
@@ -168,8 +148,11 @@ struct SDL_AudioDevice
     SDL_atomic_t paused;
     SDL_bool iscapture;
 
-    /* Fake audio buffer for when the audio hardware is busy */
-    Uint8 *fake_stream;
+    /* Scratch buffer used in the bridge between SDL and the user callback. */
+    Uint8 *work_buffer;
+
+    /* Size, in bytes, of work_buffer. */
+    Uint32 work_buffer_len;
 
     /* A mutex for locking the mixing buffers */
     SDL_mutex *mixer_lock;
@@ -179,10 +162,7 @@ struct SDL_AudioDevice
     SDL_threadID threadid;
 
     /* Queued buffers (if app not using callback). */
-    SDL_AudioBufferQueue *buffer_queue_head; /* device fed from here. */
-    SDL_AudioBufferQueue *buffer_queue_tail; /* queue fills to here. */
-    SDL_AudioBufferQueue *buffer_queue_pool; /* these are unused packets. */
-    Uint32 queued_bytes;  /* number of bytes of audio data in the queue. */
+    SDL_DataQueue *buffer_queue;
 
     /* * * */
     /* Data private to this driver */
@@ -200,6 +180,32 @@ typedef struct AudioBootStrap
     int demand_only;  /* 1==request explicitly, or it won't be available. */
 } AudioBootStrap;
 
-#endif /* _SDL_sysaudio_h */
+/* Not all of these are available in a given build. Use #ifdefs, etc. */
+extern AudioBootStrap PULSEAUDIO_bootstrap;
+extern AudioBootStrap ALSA_bootstrap;
+extern AudioBootStrap JACK_bootstrap;
+extern AudioBootStrap SNDIO_bootstrap;
+extern AudioBootStrap NETBSDAUDIO_bootstrap;
+extern AudioBootStrap DSP_bootstrap;
+extern AudioBootStrap QSAAUDIO_bootstrap;
+extern AudioBootStrap SUNAUDIO_bootstrap;
+extern AudioBootStrap ARTS_bootstrap;
+extern AudioBootStrap ESD_bootstrap;
+extern AudioBootStrap NACLAUDIO_bootstrap;
+extern AudioBootStrap NAS_bootstrap;
+extern AudioBootStrap WASAPI_bootstrap;
+extern AudioBootStrap DSOUND_bootstrap;
+extern AudioBootStrap WINMM_bootstrap;
+extern AudioBootStrap PAUDIO_bootstrap;
+extern AudioBootStrap HAIKUAUDIO_bootstrap;
+extern AudioBootStrap COREAUDIO_bootstrap;
+extern AudioBootStrap DISKAUDIO_bootstrap;
+extern AudioBootStrap DUMMYAUDIO_bootstrap;
+extern AudioBootStrap FUSIONSOUND_bootstrap;
+extern AudioBootStrap ANDROIDAUDIO_bootstrap;
+extern AudioBootStrap PSPAUDIO_bootstrap;
+extern AudioBootStrap EMSCRIPTENAUDIO_bootstrap;
+
+#endif /* SDL_sysaudio_h_ */
 
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/SDL_wave.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -403,6 +403,47 @@ IMA_ADPCM_decode(Uint8 ** audio_buf, Uint32 * audio_len)
     return (0);
 }
 
+
+static int
+ConvertSint24ToSint32(Uint8 ** audio_buf, Uint32 * audio_len)
+{
+    const double DIVBY8388608 = 0.00000011920928955078125;
+    const Uint32 original_len = *audio_len;
+    const Uint32 samples = original_len / 3;
+    const Uint32 expanded_len = samples * sizeof (Uint32);
+    Uint8 *ptr = (Uint8 *) SDL_realloc(*audio_buf, expanded_len);
+    const Uint8 *src;
+    Uint32 *dst;
+    Uint32 i;
+
+    if (!ptr) {
+        return SDL_OutOfMemory();
+    }
+
+    *audio_buf = ptr;
+    *audio_len = expanded_len;
+
+    /* work from end to start, since we're expanding in-place. */
+    src = (ptr + original_len) - 3;
+    dst = ((Uint32 *) (ptr + expanded_len)) - 1;
+    for (i = 0; i < samples; i++) {
+        /* There's probably a faster way to do all this. */
+        const Sint32 converted = ((Sint32) ( (((Uint32) src[2]) << 24) |
+                                             (((Uint32) src[1]) << 16) |
+                                             (((Uint32) src[0]) << 8) )) >> 8;
+        const double scaled = (((double) converted) * DIVBY8388608);
+        src -= 3;
+        *(dst--) = (Sint32) (scaled * 2147483647.0);
+    }
+
+    return 0;
+}
+
+
+/* GUIDs that are used by WAVE_FORMAT_EXTENSIBLE */
+static const Uint8 extensible_pcm_guid[16] = { 1, 0, 0, 0, 0, 0, 16, 0, 128, 0, 0, 170, 0, 56, 155, 113 };
+static const Uint8 extensible_ieee_guid[16] = { 3, 0, 0, 0, 0, 0, 16, 0, 128, 0, 0, 170, 0, 56, 155, 113 };
+
 SDL_AudioSpec *
 SDL_LoadWAV_RW(SDL_RWops * src, int freesrc,
                SDL_AudioSpec * spec, Uint8 ** audio_buf, Uint32 * audio_len)
@@ -421,6 +462,7 @@ SDL_LoadWAV_RW(SDL_RWops * src, int freesrc,
 
     /* FMT chunk */
     WaveFMT *format = NULL;
+    WaveExtensibleFMT *ext = NULL;
 
     SDL_zero(chunk);
 
@@ -494,6 +536,24 @@ SDL_LoadWAV_RW(SDL_RWops * src, int freesrc,
         }
         IMA_ADPCM_encoded = 1;
         break;
+    case EXTENSIBLE_CODE:
+        /* note that this ignores channel masks, smaller valid bit counts
+           inside a larger container, and most subtypes. This is just enough
+           to get things that didn't really _need_ WAVE_FORMAT_EXTENSIBLE
+           to be useful working when they use this format flag. */
+        ext = (WaveExtensibleFMT *) format;
+        if (SDL_SwapLE16(ext->size) < 22) {
+            SDL_SetError("bogus extended .wav header");
+            was_error = 1;
+            goto done;
+        }
+        if (SDL_memcmp(ext->subformat, extensible_pcm_guid, 16) == 0) {
+            break;  /* cool. */
+        } else if (SDL_memcmp(ext->subformat, extensible_ieee_guid, 16) == 0) {
+            IEEE_float_encoded = 1;
+            break;
+        }
+        break;
     case MP3_CODE:
         SDL_SetError("MPEG Layer 3 data not supported");
         was_error = 1;
@@ -528,6 +588,9 @@ SDL_LoadWAV_RW(SDL_RWops * src, int freesrc,
         case 16:
             spec->format = AUDIO_S16;
             break;
+        case 24:  /* convert this. */
+            spec->format = AUDIO_S32;
+            break;
         case 32:
             spec->format = AUDIO_S32;
             break;
@@ -575,6 +638,13 @@ SDL_LoadWAV_RW(SDL_RWops * src, int freesrc,
         }
     }
 
+    if (SDL_SwapLE16(format->bitspersample) == 24) {
+        if (ConvertSint24ToSint32(audio_buf, audio_len) < 0) {
+            was_error = 1;
+            goto done;
+        }
+    }
+
     /* Don't return a buffer that isn't a multiple of samplesize */
     samplesize = ((SDL_AUDIO_BITSIZE(spec->format)) / 8) * spec->channels;
     *audio_len &= ~(samplesize - 1);

Engine/lib/sdl/src/audio/SDL_wave.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -38,6 +38,7 @@
 #define IEEE_FLOAT_CODE 0x0003
 #define IMA_ADPCM_CODE  0x0011
 #define MP3_CODE        0x0055
+#define EXTENSIBLE_CODE 0xFFFE
 #define WAVE_MONO       1
 #define WAVE_STEREO     2
 
@@ -64,4 +65,13 @@ typedef struct Chunk
     Uint8 *data;
 } Chunk;
 
+typedef struct WaveExtensibleFMT
+{
+    WaveFMT format;
+    Uint16 size;
+    Uint16 validbits;
+    Uint32 channelmask;
+    Uint8 subformat[16];  /* a GUID. */
+} WaveExtensibleFMT;
+
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/alsa/SDL_alsa_audio.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -26,7 +26,6 @@
 
 #include <sys/types.h>
 #include <signal.h>             /* For kill() */
-#include <errno.h>
 #include <string.h>
 
 #include "SDL_assert.h"
@@ -91,6 +90,10 @@ static int (*ALSA_snd_pcm_reset)(snd_pcm_t *);
 static int (*ALSA_snd_device_name_hint) (int, const char *, void ***);
 static char* (*ALSA_snd_device_name_get_hint) (const void *, const char *);
 static int (*ALSA_snd_device_name_free_hint) (void **);
+#ifdef SND_CHMAP_API_VERSION
+static snd_pcm_chmap_t* (*ALSA_snd_pcm_get_chmap) (snd_pcm_t *);
+static int (*ALSA_snd_pcm_chmap_print) (const snd_pcm_chmap_t *map, size_t maxlen, char *buf);
+#endif
 
 #ifdef SDL_AUDIO_DRIVER_ALSA_DYNAMIC
 #define snd_pcm_hw_params_sizeof ALSA_snd_pcm_hw_params_sizeof
@@ -155,6 +158,10 @@ load_alsa_syms(void)
     SDL_ALSA_SYM(snd_device_name_hint);
     SDL_ALSA_SYM(snd_device_name_get_hint);
     SDL_ALSA_SYM(snd_device_name_free_hint);
+#ifdef SND_CHMAP_API_VERSION
+    SDL_ALSA_SYM(snd_pcm_get_chmap);
+    SDL_ALSA_SYM(snd_pcm_chmap_print);
+#endif
 
     return 0;
 }
@@ -255,25 +262,25 @@ ALSA_WaitDevice(_THIS)
         tmp = ptr[3]; ptr[3] = ptr[5]; ptr[5] = tmp; \
     }
 
-static SDL_INLINE void
+static void
 swizzle_alsa_channels_6_64bit(void *buffer, Uint32 bufferlen)
 {
     SWIZ6(Uint64, buffer, bufferlen);
 }
 
-static SDL_INLINE void
+static void
 swizzle_alsa_channels_6_32bit(void *buffer, Uint32 bufferlen)
 {
     SWIZ6(Uint32, buffer, bufferlen);
 }
 
-static SDL_INLINE void
+static void
 swizzle_alsa_channels_6_16bit(void *buffer, Uint32 bufferlen)
 {
     SWIZ6(Uint16, buffer, bufferlen);
 }
 
-static SDL_INLINE void
+static void
 swizzle_alsa_channels_6_8bit(void *buffer, Uint32 bufferlen)
 {
     SWIZ6(Uint8, buffer, bufferlen);
@@ -286,7 +293,7 @@ swizzle_alsa_channels_6_8bit(void *buffer, Uint32 bufferlen)
  * Called right before feeding this->hidden->mixbuf to the hardware. Swizzle
  *  channels from Windows/Mac order to the format alsalib will want.
  */
-static SDL_INLINE void
+static void
 swizzle_alsa_channels(_THIS, void *buffer, Uint32 bufferlen)
 {
     if (this->spec.channels == 6) {
@@ -302,6 +309,15 @@ swizzle_alsa_channels(_THIS, void *buffer, Uint32 bufferlen)
     /* !!! FIXME: update this for 7.1 if needed, later. */
 }
 
+#ifdef SND_CHMAP_API_VERSION
+/* Some devices have the right channel map, no swizzling necessary */
+static void
+no_swizzle(_THIS, void *buffer, Uint32 bufferlen)
+{
+    return;
+}
+#endif /* SND_CHMAP_API_VERSION */
+
 
 static void
 ALSA_PlayDevice(_THIS)
@@ -311,23 +327,10 @@ ALSA_PlayDevice(_THIS)
                                 this->spec.channels;
     snd_pcm_uframes_t frames_left = ((snd_pcm_uframes_t) this->spec.samples);
 
-    swizzle_alsa_channels(this, this->hidden->mixbuf, frames_left);
+    this->hidden->swizzle_func(this, this->hidden->mixbuf, frames_left);
 
     while ( frames_left > 0 && SDL_AtomicGet(&this->enabled) ) {
-        int status;
-
-        /* This wait is a work-around for a hang when USB devices are
-           unplugged.  Normally it should not result in any waiting,
-           but in the case of a USB unplug, it serves as a way to
-           join the playback thread after the timeout occurs */
-        status = ALSA_snd_pcm_wait(this->hidden->pcm_handle, 1000);
-        if (status == 0) {
-            /*fprintf(stderr, "ALSA timeout waiting for available buffer space\n");*/
-            SDL_OpenedAudioDeviceDisconnected(this);
-            return;
-        }
-
-        status = ALSA_snd_pcm_writei(this->hidden->pcm_handle,
+        int status = ALSA_snd_pcm_writei(this->hidden->pcm_handle,
                                          sample_buf, frames_left);
 
         if (status < 0) {
@@ -347,6 +350,13 @@ ALSA_PlayDevice(_THIS)
             }
             continue;
         }
+        else if (status == 0) {
+            /* No frames were written (no available space in pcm device).
+               Allow other threads to catch up. */
+            Uint32 delay = (frames_left / 2 * 1000) / this->spec.freq;
+            SDL_Delay(delay);
+        }
+
         sample_buf += status * frame_size;
         frames_left -= status;
     }
@@ -366,23 +376,22 @@ ALSA_CaptureFromDevice(_THIS, void *buffer, int buflen)
                                 this->spec.channels;
     const int total_frames = buflen / frame_size;
     snd_pcm_uframes_t frames_left = total_frames;
+    snd_pcm_uframes_t wait_time = frame_size / 2;
 
     SDL_assert((buflen % frame_size) == 0);
 
     while ( frames_left > 0 && SDL_AtomicGet(&this->enabled) ) {
-        /* !!! FIXME: This works, but needs more testing before going live */
-        /* ALSA_snd_pcm_wait(this->hidden->pcm_handle, -1); */
-        int status = ALSA_snd_pcm_readi(this->hidden->pcm_handle,
+        int status;
+
+        status = ALSA_snd_pcm_readi(this->hidden->pcm_handle,
                                         sample_buf, frames_left);
 
-        if (status < 0) {
+        if (status == -EAGAIN) {
+            ALSA_snd_pcm_wait(this->hidden->pcm_handle, wait_time);
+            status = 0;
+        }
+        else if (status < 0) {
             /*printf("ALSA: capture error %d\n", status);*/
-            if (status == -EAGAIN) {
-                /* Apparently snd_pcm_recover() doesn't handle this case -
-                   does it assume snd_pcm_wait() above? */
-                SDL_Delay(1);
-                continue;
-            }
             status = ALSA_snd_pcm_recover(this->hidden->pcm_handle, status, 0);
             if (status < 0) {
                 /* Hmm, not much we can do - abort */
@@ -398,7 +407,7 @@ ALSA_CaptureFromDevice(_THIS, void *buffer, int buflen)
         frames_left -= status;
     }
 
-    swizzle_alsa_channels(this, buffer, total_frames - frames_left);
+    this->hidden->swizzle_func(this, buffer, total_frames - frames_left);
 
     return (total_frames - frames_left) * frame_size;
 }
@@ -548,6 +557,10 @@ ALSA_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
     SDL_AudioFormat test_format = 0;
     unsigned int rate = 0;
     unsigned int channels = 0;
+#ifdef SND_CHMAP_API_VERSION
+    snd_pcm_chmap_t *chmap;
+    char chmap_str[64];
+#endif
 
     /* Initialize all variables that we clean on shutdown */
     this->hidden = (struct SDL_PrivateAudioData *)
@@ -640,6 +653,22 @@ ALSA_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
     }
     this->spec.format = test_format;
 
+    /* Validate number of channels and determine if swizzling is necessary
+     * Assume original swizzling, until proven otherwise.
+     */
+    this->hidden->swizzle_func = swizzle_alsa_channels;
+#ifdef SND_CHMAP_API_VERSION
+    chmap = ALSA_snd_pcm_get_chmap(pcm_handle);
+    if (chmap) {
+        ALSA_snd_pcm_chmap_print(chmap, sizeof(chmap_str), chmap_str);
+        if (SDL_strcmp("FL FR FC LFE RL RR", chmap_str) == 0 ||
+            SDL_strcmp("FL FR FC LFE SL SR", chmap_str) == 0) {
+            this->hidden->swizzle_func = no_swizzle;
+        }
+        free(chmap);
+    }
+#endif /* SND_CHMAP_API_VERSION */
+
     /* Set the number of channels */
     status = ALSA_snd_pcm_hw_params_set_channels(pcm_handle, hwparams,
                                                  this->spec.channels);
@@ -708,8 +737,9 @@ ALSA_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
         SDL_memset(this->hidden->mixbuf, this->spec.silence, this->hidden->mixlen);
     }
 
-    /* Switch to blocking mode for playback */
-    ALSA_snd_pcm_nonblock(pcm_handle, 0);
+    if (!iscapture) {
+        ALSA_snd_pcm_nonblock(pcm_handle, 0);
+    }
 
     /* We're ready to rock and roll. :-) */
     return 0;
@@ -726,18 +756,28 @@ static void
 add_device(const int iscapture, const char *name, void *hint, ALSA_Device **pSeen)
 {
     ALSA_Device *dev = SDL_malloc(sizeof (ALSA_Device));
-    char *desc = ALSA_snd_device_name_get_hint(hint, "DESC");
+    char *desc;
     char *handle = NULL;
     char *ptr;
 
-    if (!desc) {
-        SDL_free(dev);
-        return;
-    } else if (!dev) {
-        free(desc);
+    if (!dev) {
         return;
     }
 
+    /* Not all alsa devices are enumerable via snd_device_name_get_hint
+       (i.e. bluetooth devices).  Therefore if hint is passed in to this
+       function as  NULL, assume name contains desc.
+       Make sure not to free the storage associated with desc in this case */
+    if (hint) {
+        desc = ALSA_snd_device_name_get_hint(hint, "DESC");
+        if (!desc) {
+            SDL_free(dev);
+            return;
+        }
+    } else {
+        desc = (char *) name;
+    }
+
     SDL_assert(name != NULL);
 
     /* some strings have newlines, like "HDA NVidia, HDMI 0\nHDMI Audio Output".
@@ -751,14 +791,16 @@ add_device(const int iscapture, const char *name, void *hint, ALSA_Device **pSee
 
     handle = SDL_strdup(name);
     if (!handle) {
-        free(desc);
+        if (hint) {
+            free(desc);
+        }
         SDL_free(dev);
         return;
     }
 
     SDL_AddAudioDevice(iscapture, desc, handle);
-    free(desc);
-
+    if (hint)
+        free(desc);
     dev->name = handle;
     dev->iscapture = iscapture;
     dev->next = *pSeen;
@@ -778,12 +820,15 @@ ALSA_HotplugThread(void *arg)
     ALSA_Device *dev;
     Uint32 ticks;
 
+    SDL_SetThreadPriority(SDL_THREAD_PRIORITY_LOW);
+
     while (!SDL_AtomicGet(&ALSA_hotplug_shutdown)) {
         void **hints = NULL;
+        ALSA_Device *unseen;
+        ALSA_Device *seen;
+        ALSA_Device *prev;
+
         if (ALSA_snd_device_name_hint(-1, "pcm", &hints) != -1) {
-            ALSA_Device *unseen = devices;
-            ALSA_Device *seen = NULL;
-            ALSA_Device *prev;
             int i, j;
             const char *match = NULL;
             int bestmatch = 0xFFFF;
@@ -793,6 +838,8 @@ ALSA_HotplugThread(void *arg)
                 "hw:", "sysdefault:", "default:", NULL
             };
 
+            unseen = devices;
+            seen = NULL;
             /* Apparently there are several different ways that ALSA lists
                actual hardware. It could be prefixed with "hw:" or "default:"
                or "sysdefault:" and maybe others. Go through the list and see
@@ -887,7 +934,7 @@ ALSA_HotplugThread(void *arg)
 
             /* report anything still in unseen as removed. */
             for (dev = unseen; dev; dev = next) {
-                /*printf("ALSA: removing %s device '%s'\n", dev->iscapture ? "capture" : "output", dev->name);*/
+                /*printf("ALSA: removing usb %s device '%s'\n", dev->iscapture ? "capture" : "output", dev->name);*/
                 next = dev->next;
                 SDL_RemoveAudioDevice(dev->iscapture, dev->name);
                 SDL_free(dev->name);

Engine/lib/sdl/src/audio/alsa/SDL_alsa_audio.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -20,8 +20,8 @@
 */
 #include "../../SDL_internal.h"
 
-#ifndef _SDL_ALSA_audio_h
-#define _SDL_ALSA_audio_h
+#ifndef SDL_ALSA_audio_h_
+#define SDL_ALSA_audio_h_
 
 #include <alsa/asoundlib.h>
 
@@ -38,8 +38,11 @@ struct SDL_PrivateAudioData
     /* Raw mixing buffer */
     Uint8 *mixbuf;
     int mixlen;
+
+    /* swizzle function */
+    void (*swizzle_func)(_THIS, void *buffer, Uint32 bufferlen);
 };
 
-#endif /* _SDL_ALSA_audio_h */
+#endif /* SDL_ALSA_audio_h_ */
 
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/android/SDL_androidaudio.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -215,6 +215,10 @@ void ANDROIDAUDIO_ResumeDevices(void)
     }
 }
 
+#else 
+
+void ANDROIDAUDIO_ResumeDevices(void) {}
+void ANDROIDAUDIO_PauseDevices(void) {}
 
 #endif /* SDL_AUDIO_DRIVER_ANDROID */
 

Engine/lib/sdl/src/audio/android/SDL_androidaudio.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -20,8 +20,8 @@
 */
 #include "../../SDL_internal.h"
 
-#ifndef _SDL_androidaudio_h
-#define _SDL_androidaudio_h
+#ifndef SDL_androidaudio_h_
+#define SDL_androidaudio_h_
 
 #include "../SDL_sysaudio.h"
 
@@ -34,6 +34,9 @@ struct SDL_PrivateAudioData
     int resume;
 };
 
-#endif /* _SDL_androidaudio_h */
+void ANDROIDAUDIO_ResumeDevices(void);
+void ANDROIDAUDIO_PauseDevices(void);
+
+#endif /* SDL_androidaudio_h_ */
 
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/arts/SDL_artsaudio.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages

Engine/lib/sdl/src/audio/arts/SDL_artsaudio.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -20,8 +20,8 @@
 */
 #include "../../SDL_internal.h"
 
-#ifndef _SDL_artscaudio_h
-#define _SDL_artscaudio_h
+#ifndef SDL_artsaudio_h_
+#define SDL_artsaudio_h_
 
 #include <artsc.h>
 
@@ -42,11 +42,12 @@ struct SDL_PrivateAudioData
     Uint8 *mixbuf;
     int mixlen;
 
-    /* Support for audio timing using a timer, in addition to select() */
+    /* Support for audio timing using a timer, in addition to SDL_IOReady() */
     float frame_ticks;
     float next_frame;
 };
 #define FUDGE_TICKS 10      /* The scheduler overhead ticks per frame */
 
-#endif /* _SDL_artscaudio_h */
+#endif /* SDL_artsaudio_h_ */
+
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/coreaudio/SDL_coreaudio.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -20,8 +20,8 @@
 */
 #include "../../SDL_internal.h"
 
-#ifndef _SDL_coreaudio_h
-#define _SDL_coreaudio_h
+#ifndef SDL_coreaudio_h_
+#define SDL_coreaudio_h_
 
 #include "../SDL_sysaudio.h"
 
@@ -47,7 +47,7 @@ struct SDL_PrivateAudioData
 {
     SDL_Thread *thread;
     AudioQueueRef audioQueue;
-    AudioQueueBufferRef audioBuffer[2];
+    AudioQueueBufferRef *audioBuffer;
     void *buffer;
     UInt32 bufferOffset;
     UInt32 bufferSize;
@@ -63,5 +63,6 @@ struct SDL_PrivateAudioData
 #endif
 };
 
-#endif /* _SDL_coreaudio_h */
+#endif /* SDL_coreaudio_h_ */
+
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/coreaudio/SDL_coreaudio.m

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -25,6 +25,7 @@
 /* !!! FIXME: clean out some of the macro salsa in here. */
 
 #include "SDL_audio.h"
+#include "SDL_hints.h"
 #include "../SDL_audio_c.h"
 #include "../SDL_sysaudio.h"
 #include "SDL_coreaudio.h"
@@ -285,9 +286,9 @@ static void interruption_begin(_THIS)
 static void interruption_end(_THIS)
 {
     if (this != NULL && this->hidden != NULL && this->hidden->audioQueue != NULL
-    && this->hidden->interrupted) {
+    && this->hidden->interrupted
+    && AudioQueueStart(this->hidden->audioQueue, NULL) == AVAudioSessionErrorCodeNone) {
         this->hidden->interrupted = SDL_FALSE;
-        AudioQueueStart(this->hidden->audioQueue, NULL);
     }
 }
 
@@ -325,7 +326,8 @@ static BOOL update_audio_session(_THIS, SDL_bool open)
     @autoreleasepool {
         AVAudioSession *session = [AVAudioSession sharedInstance];
         NSNotificationCenter *center = [NSNotificationCenter defaultCenter];
-        NSString *category;
+        /* Set category to ambient by default so that other music continues playing. */
+        NSString *category = AVAudioSessionCategoryAmbient;
         NSError *err = nil;
 
         if (open_playback_devices && open_capture_devices) {
@@ -333,10 +335,17 @@ static BOOL update_audio_session(_THIS, SDL_bool open)
         } else if (open_capture_devices) {
             category = AVAudioSessionCategoryRecord;
         } else {
-            /* Set category to ambient so that other music continues playing.
-             You can change this at runtime in your own code if you need different
-             behavior. If this is common, we can add an SDL hint for this. */
-            category = AVAudioSessionCategoryAmbient;
+            const char *hint = SDL_GetHint(SDL_HINT_AUDIO_CATEGORY);
+            if (hint) {
+                if (SDL_strcasecmp(hint, "AVAudioSessionCategoryAmbient") == 0) {
+                    category = AVAudioSessionCategoryAmbient;
+                } else if (SDL_strcasecmp(hint, "AVAudioSessionCategorySoloAmbient") == 0) {
+                    category = AVAudioSessionCategorySoloAmbient;
+                } else if (SDL_strcasecmp(hint, "AVAudioSessionCategoryPlayback") == 0 ||
+                           SDL_strcasecmp(hint, "playback") == 0) {
+                    category = AVAudioSessionCategoryPlayback;
+                }
+            }
         }
 
         if (![session setCategory:category error:&err]) {
@@ -400,8 +409,12 @@ static void
 outputCallback(void *inUserData, AudioQueueRef inAQ, AudioQueueBufferRef inBuffer)
 {
     SDL_AudioDevice *this = (SDL_AudioDevice *) inUserData;
+    if (SDL_AtomicGet(&this->hidden->shutdown)) {
+        return;  /* don't do anything. */
+    }
+
     if (!SDL_AtomicGet(&this->enabled) || SDL_AtomicGet(&this->paused)) {
-        /* Supply silence if audio is enabled and not paused */
+        /* Supply silence if audio is not enabled or paused */
         SDL_memset(inBuffer->mAudioData, this->spec.silence, inBuffer->mAudioDataBytesCapacity);
     } else {
         UInt32 remaining = inBuffer->mAudioDataBytesCapacity;
@@ -412,7 +425,7 @@ outputCallback(void *inUserData, AudioQueueRef inAQ, AudioQueueBufferRef inBuffe
             if (this->hidden->bufferOffset >= this->hidden->bufferSize) {
                 /* Generate the data */
                 SDL_LockMutex(this->mixer_lock);
-                (*this->spec.callback)(this->spec.userdata,
+                (*this->callbackspec.callback)(this->callbackspec.userdata,
                             this->hidden->buffer, this->hidden->bufferSize);
                 SDL_UnlockMutex(this->mixer_lock);
                 this->hidden->bufferOffset = 0;
@@ -430,9 +443,7 @@ outputCallback(void *inUserData, AudioQueueRef inAQ, AudioQueueBufferRef inBuffe
         }
     }
 
-    if (!SDL_AtomicGet(&this->hidden->shutdown)) {
-        AudioQueueEnqueueBuffer(this->hidden->audioQueue, inBuffer, 0, NULL);
-    }
+    AudioQueueEnqueueBuffer(this->hidden->audioQueue, inBuffer, 0, NULL);
 
     inBuffer->mAudioDataByteSize = inBuffer->mAudioDataBytesCapacity;
 }
@@ -443,7 +454,13 @@ inputCallback(void *inUserData, AudioQueueRef inAQ, AudioQueueBufferRef inBuffer
               const AudioStreamPacketDescription *inPacketDescs )
 {
     SDL_AudioDevice *this = (SDL_AudioDevice *) inUserData;
-    if (SDL_AtomicGet(&this->enabled) && !SDL_AtomicGet(&this->paused)) {  /* ignore unless we're active. */
+
+    if (SDL_AtomicGet(&this->shutdown)) {
+        return;  /* don't do anything. */
+    }
+
+    /* ignore unless we're active. */
+    if (!SDL_AtomicGet(&this->paused) && SDL_AtomicGet(&this->enabled) && !SDL_AtomicGet(&this->paused)) {
         const Uint8 *ptr = (const Uint8 *) inBuffer->mAudioData;
         UInt32 remaining = inBuffer->mAudioDataByteSize;
         while (remaining > 0) {
@@ -459,16 +476,14 @@ inputCallback(void *inUserData, AudioQueueRef inAQ, AudioQueueBufferRef inBuffer
 
             if (this->hidden->bufferOffset >= this->hidden->bufferSize) {
                 SDL_LockMutex(this->mixer_lock);
-                (*this->spec.callback)(this->spec.userdata, this->hidden->buffer, this->hidden->bufferSize);
+                (*this->callbackspec.callback)(this->callbackspec.userdata, this->hidden->buffer, this->hidden->bufferSize);
                 SDL_UnlockMutex(this->mixer_lock);
                 this->hidden->bufferOffset = 0;
             }
         }
     }
 
-    if (!SDL_AtomicGet(&this->hidden->shutdown)) {
-        AudioQueueEnqueueBuffer(this->hidden->audioQueue, inBuffer, 0, NULL);
-    }
+    AudioQueueEnqueueBuffer(this->hidden->audioQueue, inBuffer, 0, NULL);
 }
 
 
@@ -514,7 +529,6 @@ static void
 COREAUDIO_CloseDevice(_THIS)
 {
     const SDL_bool iscapture = this->iscapture;
-    int i;
 
 /* !!! FIXME: what does iOS do when a bluetooth audio device vanishes? Headphones unplugged? */
 /* !!! FIXME: (we only do a "default" device on iOS right now...can we do more?) */
@@ -527,24 +541,24 @@ COREAUDIO_CloseDevice(_THIS)
     update_audio_session(this, SDL_FALSE);
 #endif
 
+    /* if callback fires again, feed silence; don't call into the app. */
+    SDL_AtomicSet(&this->paused, 1);
+
+    if (this->hidden->audioQueue) {
+        AudioQueueDispose(this->hidden->audioQueue, 1);
+    }
+
     if (this->hidden->thread) {
         SDL_AtomicSet(&this->hidden->shutdown, 1);
         SDL_WaitThread(this->hidden->thread, NULL);
     }
 
-    if (this->hidden->audioQueue) {
-        for (i = 0; i < SDL_arraysize(this->hidden->audioBuffer); i++) {
-            if (this->hidden->audioBuffer[i]) {
-                AudioQueueFreeBuffer(this->hidden->audioQueue, this->hidden->audioBuffer[i]);
-            }
-        }
-        AudioQueueDispose(this->hidden->audioQueue, 1);
-    }
-
     if (this->hidden->ready_semaphore) {
         SDL_DestroySemaphore(this->hidden->ready_semaphore);
     }
 
+    /* AudioQueueDispose() frees the actual buffer objects. */
+    SDL_free(this->hidden->audioBuffer);
     SDL_free(this->hidden->thread_error);
     SDL_free(this->hidden->buffer);
     SDL_free(this->hidden);
@@ -663,7 +677,31 @@ prepare_audioqueue(_THIS)
         return 0;
     }
 
-    for (i = 0; i < SDL_arraysize(this->hidden->audioBuffer); i++) {
+    /* Make sure we can feed the device a minimum amount of time */
+    double MINIMUM_AUDIO_BUFFER_TIME_MS = 15.0;
+#if defined(__IPHONEOS__)
+    if (floor(NSFoundationVersionNumber) <= NSFoundationVersionNumber_iOS_7_1) {
+        /* Older iOS hardware, use 40 ms as a minimum time */
+        MINIMUM_AUDIO_BUFFER_TIME_MS = 40.0;
+    }
+#endif
+    const double msecs = (this->spec.samples / ((double) this->spec.freq)) * 1000.0;
+    int numAudioBuffers = 2;
+    if (msecs < MINIMUM_AUDIO_BUFFER_TIME_MS) {  /* use more buffers if we have a VERY small sample set. */
+        numAudioBuffers = ((int)SDL_ceil(MINIMUM_AUDIO_BUFFER_TIME_MS / msecs) * 2);
+    }
+
+    this->hidden->audioBuffer = SDL_calloc(1, sizeof (AudioQueueBufferRef) * numAudioBuffers);
+    if (this->hidden->audioBuffer == NULL) {
+        SDL_OutOfMemory();
+        return 0;
+    }
+
+#if DEBUG_COREAUDIO
+    printf("COREAUDIO: numAudioBuffers == %d\n", numAudioBuffers);
+#endif
+
+    for (i = 0; i < numAudioBuffers; i++) {
         result = AudioQueueAllocateBuffer(this->hidden->audioQueue, this->spec.size, &this->hidden->audioBuffer[i]);
         CHECK_RESULT("AudioQueueAllocateBuffer");
         SDL_memset(this->hidden->audioBuffer[i]->mAudioData, this->spec.silence, this->hidden->audioBuffer[i]->mAudioDataBytesCapacity);
@@ -696,10 +734,7 @@ audioqueue_thread(void *arg)
         CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0.10, 1);
     }
 
-    if (this->iscapture) {  /* just stop immediately for capture devices. */
-        AudioQueueStop(this->hidden->audioQueue, 1);
-    } else {  /* Drain off any pending playback. */
-        AudioQueueStop(this->hidden->audioQueue, 0);
+    if (!this->iscapture) {  /* Drain off any pending playback. */
         const CFTimeInterval secs = (((this->spec.size / (SDL_AUDIO_BITSIZE(this->spec.format) / 8)) / this->spec.channels) / ((CFTimeInterval) this->spec.freq)) * 2.0;
         CFRunLoopRunInMode(kCFRunLoopDefaultMode, secs, 0);
     }
@@ -734,6 +769,13 @@ COREAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
     if (!update_audio_session(this, SDL_TRUE)) {
         return -1;
     }
+
+    /* Stop CoreAudio from doing expensive audio rate conversion */
+    @autoreleasepool {
+        AVAudioSession* session = [AVAudioSession sharedInstance];
+        [session setPreferredSampleRate:this->spec.freq error:nil];
+        this->spec.freq = (int)session.sampleRate;
+    }
 #endif
 
     /* Setup a AudioStreamBasicDescription with the requested format */

Engine/lib/sdl/src/audio/directsound/SDL_directsound.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -434,7 +434,6 @@ CreateCaptureBuffer(_THIS, const DWORD bufsize, WAVEFORMATEX *wfmt)
     LPDIRECTSOUNDCAPTURE capture = this->hidden->capture;
     LPDIRECTSOUNDCAPTUREBUFFER *capturebuf = &this->hidden->capturebuf;
     DSCBUFFERDESC format;
-//    DWORD junk, cursor;
     HRESULT result;
 
     SDL_zero(format);
@@ -523,8 +522,8 @@ DSOUND_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
             bufsize = numchunks * this->spec.size;
             if ((bufsize < DSBSIZE_MIN) || (bufsize > DSBSIZE_MAX)) {
                 SDL_SetError("Sound buffer size must be between %d and %d",
-                             (DSBSIZE_MIN < numchunks) ? 1 : DSBSIZE_MIN / numchunks,
-                             DSBSIZE_MAX / numchunks);
+                             (int) ((DSBSIZE_MIN < numchunks) ? 1 : DSBSIZE_MIN / numchunks),
+                             (int) (DSBSIZE_MAX / numchunks));
             } else {
                 int rc;
 				WAVEFORMATEX wfmt;

Engine/lib/sdl/src/audio/directsound/SDL_directsound.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -20,8 +20,8 @@
 */
 #include "../../SDL_internal.h"
 
-#ifndef _SDL_directsound_h
-#define _SDL_directsound_h
+#ifndef SDL_directsound_h_
+#define SDL_directsound_h_
 
 #include "../../core/windows/SDL_directx.h"
 
@@ -42,6 +42,6 @@ struct SDL_PrivateAudioData
     Uint8 *locked_buf;
 };
 
-#endif /* _SDL_directsound_h */
+#endif /* SDL_directsound_h_ */
 
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/disk/SDL_diskaudio.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -33,6 +33,7 @@
 #include "SDL_audio.h"
 #include "../SDL_audio_c.h"
 #include "SDL_diskaudio.h"
+#include "SDL_log.h"
 
 /* !!! FIXME: these should be SDL hints, not environment variables. */
 /* environment variables and defaults. */
@@ -160,12 +161,11 @@ DISKAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
         SDL_memset(this->hidden->mixbuf, this->spec.silence, this->spec.size);
     }
 
-#if HAVE_STDIO_H
-    fprintf(stderr,
-            "WARNING: You are using the SDL disk i/o audio driver!\n"
-            " %s file [%s].\n", iscapture ? "Reading from" : "Writing to",
-            fname);
-#endif
+    SDL_LogCritical(SDL_LOG_CATEGORY_AUDIO,
+                "You are using the SDL disk i/o audio driver!\n");
+    SDL_LogCritical(SDL_LOG_CATEGORY_AUDIO,
+                " %s file [%s].\n", iscapture ? "Reading from" : "Writing to",
+                fname);
 
     /* We're ready to rock and roll. :-) */
     return 0;

Engine/lib/sdl/src/audio/disk/SDL_diskaudio.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -20,8 +20,8 @@
 */
 #include "../../SDL_internal.h"
 
-#ifndef _SDL_diskaudio_h
-#define _SDL_diskaudio_h
+#ifndef SDL_diskaudio_h_
+#define SDL_diskaudio_h_
 
 #include "SDL_rwops.h"
 #include "../SDL_sysaudio.h"
@@ -37,5 +37,5 @@ struct SDL_PrivateAudioData
     Uint8 *mixbuf;
 };
 
-#endif /* _SDL_diskaudio_h */
+#endif /* SDL_diskaudio_h_ */
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/dsp/SDL_dspaudio.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages

Engine/lib/sdl/src/audio/dsp/SDL_dspaudio.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -20,8 +20,8 @@
 */
 #include "../../SDL_internal.h"
 
-#ifndef _SDL_dspaudio_h
-#define _SDL_dspaudio_h
+#ifndef SDL_dspaudio_h_
+#define SDL_dspaudio_h_
 
 #include "../SDL_sysaudio.h"
 
@@ -39,5 +39,5 @@ struct SDL_PrivateAudioData
 };
 #define FUDGE_TICKS 10      /* The scheduler overhead ticks per frame */
 
-#endif /* _SDL_dspaudio_h */
+#endif /* SDL_dspaudio_h_ */
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/dummy/SDL_dummyaudio.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages

Engine/lib/sdl/src/audio/dummy/SDL_dummyaudio.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -20,8 +20,8 @@
 */
 #include "../../SDL_internal.h"
 
-#ifndef _SDL_dummyaudio_h
-#define _SDL_dummyaudio_h
+#ifndef SDL_dummyaudio_h_
+#define SDL_dummyaudio_h_
 
 #include "../SDL_sysaudio.h"
 
@@ -37,5 +37,5 @@ struct SDL_PrivateAudioData
     Uint32 initial_calls;
 };
 
-#endif /* _SDL_dummyaudio_h */
+#endif /* SDL_dummyaudio_h_ */
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/emscripten/SDL_emscriptenaudio.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -26,175 +26,121 @@
 #include "SDL_log.h"
 #include "../SDL_audio_c.h"
 #include "SDL_emscriptenaudio.h"
+#include "SDL_assert.h"
 
 #include <emscripten/emscripten.h>
 
-static int
-copyData(_THIS)
+static void
+FeedAudioDevice(_THIS, const void *buf, const int buflen)
 {
-    int byte_len;
+    const int framelen = (SDL_AUDIO_BITSIZE(this->spec.format) / 8) * this->spec.channels;
+    EM_ASM_ARGS({
+        var numChannels = SDL2.audio.currentOutputBuffer['numberOfChannels'];
+        for (var c = 0; c < numChannels; ++c) {
+            var channelData = SDL2.audio.currentOutputBuffer['getChannelData'](c);
+            if (channelData.length != $1) {
+                throw 'Web Audio output buffer length mismatch! Destination size: ' + channelData.length + ' samples vs expected ' + $1 + ' samples!';
+            }
 
-    if (this->hidden->write_off + this->convert.len_cvt > this->hidden->mixlen) {
-        if (this->hidden->write_off > this->hidden->read_off) {
-            SDL_memmove(this->hidden->mixbuf,
-                        this->hidden->mixbuf + this->hidden->read_off,
-                        this->hidden->mixlen - this->hidden->read_off);
-            this->hidden->write_off = this->hidden->write_off - this->hidden->read_off;
-        } else {
-            this->hidden->write_off = 0;
+            for (var j = 0; j < $1; ++j) {
+                channelData[j] = HEAPF32[$0 + ((j*numChannels + c) << 2) >> 2];  /* !!! FIXME: why are these shifts here? */
+            }
         }
-        this->hidden->read_off = 0;
-    }
-
-    SDL_memcpy(this->hidden->mixbuf + this->hidden->write_off,
-               this->convert.buf,
-               this->convert.len_cvt);
-    this->hidden->write_off += this->convert.len_cvt;
-    byte_len = this->hidden->write_off - this->hidden->read_off;
-
-    return byte_len;
+    }, buf, buflen / framelen);
 }
 
 static void
 HandleAudioProcess(_THIS)
 {
-    Uint8 *buf = NULL;
-    int byte_len = 0;
-    int bytes = SDL_AUDIO_BITSIZE(this->spec.format) / 8;
+    SDL_AudioCallback callback = this->callbackspec.callback;
+    const int stream_len = this->callbackspec.size;
 
     /* Only do something if audio is enabled */
     if (!SDL_AtomicGet(&this->enabled) || SDL_AtomicGet(&this->paused)) {
+        if (this->stream) {
+            SDL_AudioStreamClear(this->stream);
+        }
         return;
     }
 
-    if (this->convert.needed) {
-        const int bytes_in = SDL_AUDIO_BITSIZE(this->convert.src_format) / 8;
-
-        if (this->hidden->conv_in_len != 0) {
-            this->convert.len = this->hidden->conv_in_len * bytes_in * this->spec.channels;
-        }
-
-        (*this->spec.callback) (this->spec.userdata,
-                                 this->convert.buf,
-                                 this->convert.len);
-        SDL_ConvertAudio(&this->convert);
-        buf = this->convert.buf;
-        byte_len = this->convert.len_cvt;
-
-        /* size mismatch*/
-        if (byte_len != this->spec.size) {
-            if (!this->hidden->mixbuf) {
-                this->hidden->mixlen = this->spec.size > byte_len ? this->spec.size * 2 : byte_len * 2;
-                this->hidden->mixbuf = SDL_malloc(this->hidden->mixlen);
+    if (this->stream == NULL) {  /* no conversion necessary. */
+        SDL_assert(this->spec.size == stream_len);
+        callback(this->callbackspec.userdata, this->work_buffer, stream_len);
+    } else {  /* streaming/converting */
+        int got;
+        while (SDL_AudioStreamAvailable(this->stream) < ((int) this->spec.size)) {
+            callback(this->callbackspec.userdata, this->work_buffer, stream_len);
+            if (SDL_AudioStreamPut(this->stream, this->work_buffer, stream_len) == -1) {
+                SDL_AudioStreamClear(this->stream);
+                SDL_AtomicSet(&this->enabled, 0);
+                break;
             }
-
-            /* copy existing data */
-            byte_len = copyData(this);
-
-            /* read more data*/
-            while (byte_len < this->spec.size) {
-                (*this->spec.callback) (this->spec.userdata,
-                                         this->convert.buf,
-                                         this->convert.len);
-                SDL_ConvertAudio(&this->convert);
-                byte_len = copyData(this);
-            }
-
-            byte_len = this->spec.size;
-            buf = this->hidden->mixbuf + this->hidden->read_off;
-            this->hidden->read_off += byte_len;
         }
 
-    } else {
-        if (!this->hidden->mixbuf) {
-            this->hidden->mixlen = this->spec.size;
-            this->hidden->mixbuf = SDL_malloc(this->hidden->mixlen);
+        got = SDL_AudioStreamGet(this->stream, this->work_buffer, this->spec.size);
+        SDL_assert((got < 0) || (got == this->spec.size));
+        if (got != this->spec.size) {
+            SDL_memset(this->work_buffer, this->spec.silence, this->spec.size);
         }
-        (*this->spec.callback) (this->spec.userdata,
-                                 this->hidden->mixbuf,
-                                 this->hidden->mixlen);
-        buf = this->hidden->mixbuf;
-        byte_len = this->hidden->mixlen;
     }
 
-    if (buf) {
-        EM_ASM_ARGS({
-            var numChannels = SDL2.audio.currentOutputBuffer['numberOfChannels'];
-            for (var c = 0; c < numChannels; ++c) {
-                var channelData = SDL2.audio.currentOutputBuffer['getChannelData'](c);
-                if (channelData.length != $1) {
-                    throw 'Web Audio output buffer length mismatch! Destination size: ' + channelData.length + ' samples vs expected ' + $1 + ' samples!';
-                }
-
-                for (var j = 0; j < $1; ++j) {
-                    channelData[j] = HEAPF32[$0 + ((j*numChannels + c) << 2) >> 2];
-                }
-            }
-        }, buf, byte_len / bytes / this->spec.channels);
-    }
+    FeedAudioDevice(this, this->work_buffer, this->spec.size);
 }
 
 static void
 HandleCaptureProcess(_THIS)
 {
-    Uint8 *buf;
-    int buflen;
+    SDL_AudioCallback callback = this->callbackspec.callback;
+    const int stream_len = this->callbackspec.size;
 
     /* Only do something if audio is enabled */
     if (!SDL_AtomicGet(&this->enabled) || SDL_AtomicGet(&this->paused)) {
+        SDL_AudioStreamClear(this->stream);
         return;
     }
 
-    if (this->convert.needed) {
-        buf = this->convert.buf;
-        buflen = this->convert.len_cvt;
-    } else {
-        if (!this->hidden->mixbuf) {
-            this->hidden->mixbuf = (Uint8 *) SDL_malloc(this->spec.size);
-            if (!this->hidden->mixbuf) {
-                return;  /* oh well. */
-            }
-        }
-        buf = this->hidden->mixbuf;
-        buflen = this->spec.size;
-    }
-
     EM_ASM_ARGS({
         var numChannels = SDL2.capture.currentCaptureBuffer.numberOfChannels;
-        if (numChannels == 1) {  /* fastpath this a little for the common (mono) case. */
-            var channelData = SDL2.capture.currentCaptureBuffer.getChannelData(0);
+        for (var c = 0; c < numChannels; ++c) {
+            var channelData = SDL2.capture.currentCaptureBuffer.getChannelData(c);
             if (channelData.length != $1) {
                 throw 'Web Audio capture buffer length mismatch! Destination size: ' + channelData.length + ' samples vs expected ' + $1 + ' samples!';
             }
-            for (var j = 0; j < $1; ++j) {
-                setValue($0 + (j * 4), channelData[j], 'float');
-            }
-        } else {
-            for (var c = 0; c < numChannels; ++c) {
-                var channelData = SDL2.capture.currentCaptureBuffer.getChannelData(c);
-                if (channelData.length != $1) {
-                    throw 'Web Audio capture buffer length mismatch! Destination size: ' + channelData.length + ' samples vs expected ' + $1 + ' samples!';
-                }
 
+            if (numChannels == 1) {  /* fastpath this a little for the common (mono) case. */
+                for (var j = 0; j < $1; ++j) {
+                    setValue($0 + (j * 4), channelData[j], 'float');
+                }
+            } else {
                 for (var j = 0; j < $1; ++j) {
                     setValue($0 + (((j * numChannels) + c) * 4), channelData[j], 'float');
                 }
             }
         }
-    }, buf, (this->spec.size / sizeof (float)) / this->spec.channels);
+    }, this->work_buffer, (this->spec.size / sizeof (float)) / this->spec.channels);
 
     /* okay, we've got an interleaved float32 array in C now. */
 
-    if (this->convert.needed) {
-        SDL_ConvertAudio(&this->convert);
+    if (this->stream == NULL) {  /* no conversion necessary. */
+        SDL_assert(this->spec.size == stream_len);
+        callback(this->callbackspec.userdata, this->work_buffer, stream_len);
+    } else {  /* streaming/converting */
+        if (SDL_AudioStreamPut(this->stream, this->work_buffer, this->spec.size) == -1) {
+            SDL_AtomicSet(&this->enabled, 0);
+        }
+
+        while (SDL_AudioStreamAvailable(this->stream) >= stream_len) {
+            const int got = SDL_AudioStreamGet(this->stream, this->work_buffer, stream_len);
+            SDL_assert((got < 0) || (got == stream_len));
+            if (got != stream_len) {
+                SDL_memset(this->work_buffer, this->callbackspec.silence, stream_len);
+            }
+            callback(this->callbackspec.userdata, this->work_buffer, stream_len);  /* Send it to the app. */
+        }
     }
-
-    /* Send it to the app. */
-    (*this->spec.callback) (this->spec.userdata, buf, buflen);
 }
 
 
-
 static void
 EMSCRIPTENAUDIO_CloseDevice(_THIS)
 {
@@ -236,8 +182,9 @@ EMSCRIPTENAUDIO_CloseDevice(_THIS)
         }
     }, this->iscapture);
 
-    SDL_free(this->hidden->mixbuf);
+#if 0  /* !!! FIXME: currently not used. Can we move some stuff off the SDL2 namespace? --ryan. */
     SDL_free(this->hidden);
+#endif
 }
 
 static int
@@ -245,8 +192,6 @@ EMSCRIPTENAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscaptu
 {
     SDL_bool valid_format = SDL_FALSE;
     SDL_AudioFormat test_format;
-    int i;
-    float f;
     int result;
 
     /* based on parts of library_sdl.js */
@@ -293,29 +238,17 @@ EMSCRIPTENAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscaptu
     }
 
     /* Initialize all variables that we clean on shutdown */
+#if 0  /* !!! FIXME: currently not used. Can we move some stuff off the SDL2 namespace? --ryan. */
     this->hidden = (struct SDL_PrivateAudioData *)
         SDL_malloc((sizeof *this->hidden));
     if (this->hidden == NULL) {
         return SDL_OutOfMemory();
     }
     SDL_zerop(this->hidden);
+#endif
 
     /* limit to native freq */
-    const int sampleRate = EM_ASM_INT_V({
-        return SDL2.audioContext.sampleRate;
-    });
-
-    if(this->spec.freq != sampleRate) {
-        for (i = this->spec.samples; i > 0; i--) {
-            f = (float)i / (float)sampleRate * (float)this->spec.freq;
-            if (SDL_floor(f) == f) {
-                this->hidden->conv_in_len = SDL_floor(f);
-                break;
-            }
-        }
-
-        this->spec.freq = sampleRate;
-    }
+    this->spec.freq = EM_ASM_INT_V({ return SDL2.audioContext.sampleRate; });
 
     SDL_CalculateAudioSpec(&this->spec);
 
@@ -395,6 +328,9 @@ EMSCRIPTENAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscaptu
 static int
 EMSCRIPTENAUDIO_Init(SDL_AudioDriverImpl * impl)
 {
+    int available;
+    int capture_available;
+
     /* Set the function pointers */
     impl->OpenDevice = EMSCRIPTENAUDIO_OpenDevice;
     impl->CloseDevice = EMSCRIPTENAUDIO_CloseDevice;
@@ -406,7 +342,7 @@ EMSCRIPTENAUDIO_Init(SDL_AudioDriverImpl * impl)
     impl->ProvidesOwnCallbackThread = 1;
 
     /* check availability */
-    const int available = EM_ASM_INT_V({
+    available = EM_ASM_INT_V({
         if (typeof(AudioContext) !== 'undefined') {
             return 1;
         } else if (typeof(webkitAudioContext) !== 'undefined') {
@@ -419,7 +355,7 @@ EMSCRIPTENAUDIO_Init(SDL_AudioDriverImpl * impl)
         SDL_SetError("No audio context available");
     }
 
-    const int capture_available = available && EM_ASM_INT_V({
+    capture_available = available && EM_ASM_INT_V({
         if ((typeof(navigator.mediaDevices) !== 'undefined') && (typeof(navigator.mediaDevices.getUserMedia) !== 'undefined')) {
             return 1;
         } else if (typeof(navigator.webkitGetUserMedia) !== 'undefined') {

Engine/lib/sdl/src/audio/emscripten/SDL_emscriptenaudio.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -20,8 +20,8 @@
 */
 #include "../../SDL_internal.h"
 
-#ifndef _SDL_emscriptenaudio_h
-#define _SDL_emscriptenaudio_h
+#ifndef SDL_emscriptenaudio_h_
+#define SDL_emscriptenaudio_h_
 
 #include "../SDL_sysaudio.h"
 
@@ -30,13 +30,9 @@
 
 struct SDL_PrivateAudioData
 {
-    Uint8 *mixbuf;
-    Uint32 mixlen;
-
-    Uint32 conv_in_len;
-
-    Uint32 write_off, read_off;
+    int unused;
 };
 
-#endif /* _SDL_emscriptenaudio_h */
+#endif /* SDL_emscriptenaudio_h_ */
+
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/esd/SDL_esdaudio.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages

Engine/lib/sdl/src/audio/esd/SDL_esdaudio.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -20,8 +20,8 @@
 */
 #include "../../SDL_internal.h"
 
-#ifndef _SDL_esdaudio_h
-#define _SDL_esdaudio_h
+#ifndef SDL_esdaudio_h_
+#define SDL_esdaudio_h_
 
 #include "../SDL_sysaudio.h"
 
@@ -46,5 +46,6 @@ struct SDL_PrivateAudioData
 };
 #define FUDGE_TICKS 10      /* The scheduler overhead ticks per frame */
 
-#endif /* _SDL_esdaudio_h */
+#endif /* SDL_esdaudio_h_ */
+
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/fusionsound/SDL_fsaudio.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages

Engine/lib/sdl/src/audio/fusionsound/SDL_fsaudio.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -20,8 +20,8 @@
 */
 #include "../../SDL_internal.h"
 
-#ifndef _SDL_fsaudio_h
-#define _SDL_fsaudio_h
+#ifndef SDL_fsaudio_h_
+#define SDL_fsaudio_h_
 
 #include <fusionsound/fusionsound.h>
 
@@ -45,5 +45,6 @@ struct SDL_PrivateAudioData
 
 };
 
-#endif /* _SDL_fsaudio_h */
+#endif /* SDL_fsaudio_h_ */
+
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/haiku/SDL_haikuaudio.cc

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -36,6 +36,7 @@ extern "C"
 #include "../SDL_audio_c.h"
 #include "../SDL_sysaudio.h"
 #include "SDL_haikuaudio.h"
+#include "SDL_assert.h"
 
 }
 
@@ -47,26 +48,39 @@ FillSound(void *device, void *stream, size_t len,
           const media_raw_audio_format & format)
 {
     SDL_AudioDevice *audio = (SDL_AudioDevice *) device;
+    SDL_AudioCallback callback = audio->callbackspec.callback;
 
-    /* Only do soemthing if audio is enabled */
-    if (!SDL_AtomicGet(&audio->enabled)) {
+    /* Only do something if audio is enabled */
+    if (!SDL_AtomicGet(&audio->enabled) || SDL_AtomicGet(&audio->paused)) {
+        if (audio->stream) {
+            SDL_AudioStreamClear(audio->stream);
+        }
+        SDL_memset(stream, audio->spec.silence, len);
         return;
     }
 
-    if (!SDL_AtomicGet(&audio->paused)) {
-        if (audio->convert.needed) {
-            SDL_LockMutex(audio->mixer_lock);
-            (*audio->spec.callback) (audio->spec.userdata,
-                                     (Uint8 *) audio->convert.buf,
-                                     audio->convert.len);
-            SDL_UnlockMutex(audio->mixer_lock);
-            SDL_ConvertAudio(&audio->convert);
-            SDL_memcpy(stream, audio->convert.buf, audio->convert.len_cvt);
-        } else {
-            SDL_LockMutex(audio->mixer_lock);
-            (*audio->spec.callback) (audio->spec.userdata,
-                                     (Uint8 *) stream, len);
-            SDL_UnlockMutex(audio->mixer_lock);
+    SDL_assert(audio->spec.size == len);
+
+    if (audio->stream == NULL) {  /* no conversion necessary. */
+        SDL_LockMutex(audio->mixer_lock);
+        callback(audio->callbackspec.userdata, (Uint8 *) stream, len);
+        SDL_UnlockMutex(audio->mixer_lock);
+    } else {  /* streaming/converting */
+        const int stream_len = audio->callbackspec.size;
+        const int ilen = (int) len;
+        while (SDL_AudioStreamAvailable(audio->stream) < ilen) {
+            callback(audio->callbackspec.userdata, audio->work_buffer, stream_len);
+            if (SDL_AudioStreamPut(audio->stream, audio->work_buffer, stream_len) == -1) {
+                SDL_AudioStreamClear(audio->stream);
+                SDL_AtomicSet(&audio->enabled, 0);
+                break;
+            }
+        }
+
+        const int got = SDL_AudioStreamGet(audio->stream, stream, ilen);
+        SDL_assert((got < 0) || (got == ilen));
+        if (got != ilen) {
+            SDL_memset(stream, audio->spec.silence, len);
         }
     }
 }

Engine/lib/sdl/src/audio/haiku/SDL_haikuaudio.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -20,8 +20,8 @@
 */
 #include "../../SDL_internal.h"
 
-#ifndef _SDL_beaudio_h
-#define _SDL_beaudio_h
+#ifndef SDL_haikuaudio_h_
+#define SDL_haikuaudio_h_
 
 #include "../SDL_sysaudio.h"
 
@@ -33,6 +33,6 @@ struct SDL_PrivateAudioData
     BSoundPlayer *audio_obj;
 };
 
-#endif /* _SDL_beaudio_h */
+#endif /* SDL_haikuaudio_h_ */
 
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/jack/SDL_jackaudio.c

@@ -0,0 +1,429 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "../../SDL_internal.h"
+
+#if SDL_AUDIO_DRIVER_JACK
+
+#include "SDL_assert.h"
+#include "SDL_timer.h"
+#include "SDL_audio.h"
+#include "../SDL_audio_c.h"
+#include "SDL_jackaudio.h"
+#include "SDL_loadso.h"
+#include "../../thread/SDL_systhread.h"
+
+
+static jack_client_t * (*JACK_jack_client_open) (const char *, jack_options_t, jack_status_t *, ...);
+static int (*JACK_jack_client_close) (jack_client_t *);
+static void (*JACK_jack_on_shutdown) (jack_client_t *, JackShutdownCallback, void *);
+static int (*JACK_jack_activate) (jack_client_t *);
+static int (*JACK_jack_deactivate) (jack_client_t *);
+static void * (*JACK_jack_port_get_buffer) (jack_port_t *, jack_nframes_t);
+static int (*JACK_jack_port_unregister) (jack_client_t *, jack_port_t *);
+static void (*JACK_jack_free) (void *);
+static const char ** (*JACK_jack_get_ports) (jack_client_t *, const char *, const char *, unsigned long);
+static jack_nframes_t (*JACK_jack_get_sample_rate) (jack_client_t *);
+static jack_nframes_t (*JACK_jack_get_buffer_size) (jack_client_t *);
+static jack_port_t * (*JACK_jack_port_register) (jack_client_t *, const char *, const char *, unsigned long, unsigned long);
+static const char * (*JACK_jack_port_name) (const jack_port_t *);
+static int (*JACK_jack_connect) (jack_client_t *, const char *, const char *);
+static int (*JACK_jack_set_process_callback) (jack_client_t *, JackProcessCallback, void *);
+
+static int load_jack_syms(void);
+
+
+#ifdef SDL_AUDIO_DRIVER_JACK_DYNAMIC
+
+static const char *jack_library = SDL_AUDIO_DRIVER_JACK_DYNAMIC;
+static void *jack_handle = NULL;
+
+/* !!! FIXME: this is copy/pasted in several places now */
+static int
+load_jack_sym(const char *fn, void **addr)
+{
+    *addr = SDL_LoadFunction(jack_handle, fn);
+    if (*addr == NULL) {
+        /* Don't call SDL_SetError(): SDL_LoadFunction already did. */
+        return 0;
+    }
+
+    return 1;
+}
+
+/* cast funcs to char* first, to please GCC's strict aliasing rules. */
+#define SDL_JACK_SYM(x) \
+    if (!load_jack_sym(#x, (void **) (char *) &JACK_##x)) return -1
+
+static void
+UnloadJackLibrary(void)
+{
+    if (jack_handle != NULL) {
+        SDL_UnloadObject(jack_handle);
+        jack_handle = NULL;
+    }
+}
+
+static int
+LoadJackLibrary(void)
+{
+    int retval = 0;
+    if (jack_handle == NULL) {
+        jack_handle = SDL_LoadObject(jack_library);
+        if (jack_handle == NULL) {
+            retval = -1;
+            /* Don't call SDL_SetError(): SDL_LoadObject already did. */
+        } else {
+            retval = load_jack_syms();
+            if (retval < 0) {
+                UnloadJackLibrary();
+            }
+        }
+    }
+    return retval;
+}
+
+#else
+
+#define SDL_JACK_SYM(x) JACK_##x = x
+
+static void
+UnloadJackLibrary(void)
+{
+}
+
+static int
+LoadJackLibrary(void)
+{
+    load_jack_syms();
+    return 0;
+}
+
+#endif /* SDL_AUDIO_DRIVER_JACK_DYNAMIC */
+
+
+static int
+load_jack_syms(void)
+{
+    SDL_JACK_SYM(jack_client_open);
+    SDL_JACK_SYM(jack_client_close);
+    SDL_JACK_SYM(jack_on_shutdown);
+    SDL_JACK_SYM(jack_activate);
+    SDL_JACK_SYM(jack_deactivate);
+    SDL_JACK_SYM(jack_port_get_buffer);
+    SDL_JACK_SYM(jack_port_unregister);
+    SDL_JACK_SYM(jack_free);
+    SDL_JACK_SYM(jack_get_ports);
+    SDL_JACK_SYM(jack_get_sample_rate);
+    SDL_JACK_SYM(jack_get_buffer_size);
+    SDL_JACK_SYM(jack_port_register);
+    SDL_JACK_SYM(jack_port_name);
+    SDL_JACK_SYM(jack_connect);
+    SDL_JACK_SYM(jack_set_process_callback);
+    return 0;
+}
+
+
+static void
+jackShutdownCallback(void *arg)  /* JACK went away; device is lost. */
+{
+    SDL_AudioDevice *this = (SDL_AudioDevice *) arg;
+    SDL_OpenedAudioDeviceDisconnected(this);
+    SDL_SemPost(this->hidden->iosem);  /* unblock the SDL thread. */
+}
+
+// !!! FIXME: implement and register these!
+//typedef int(* JackSampleRateCallback)(jack_nframes_t nframes, void *arg)
+//typedef int(* JackBufferSizeCallback)(jack_nframes_t nframes, void *arg)
+
+static int
+jackProcessPlaybackCallback(jack_nframes_t nframes, void *arg)
+{
+    SDL_AudioDevice *this = (SDL_AudioDevice *) arg;
+    jack_port_t **ports = this->hidden->sdlports;
+    const int total_channels = this->spec.channels;
+    const int total_frames = this->spec.samples;
+    int channelsi;
+
+    if (!SDL_AtomicGet(&this->enabled)) {
+        /* silence the buffer to avoid repeats and corruption. */
+        SDL_memset(this->hidden->iobuffer, '\0', this->spec.size);
+    }
+
+    for (channelsi = 0; channelsi < total_channels; channelsi++) {
+        float *dst = (float *) JACK_jack_port_get_buffer(ports[channelsi], nframes);
+        if (dst) {
+            const float *src = ((float *) this->hidden->iobuffer) + channelsi;
+            int framesi;
+            for (framesi = 0; framesi < total_frames; framesi++) {
+                *(dst++) = *src;
+                src += total_channels;
+            }
+        }
+    }
+
+    SDL_SemPost(this->hidden->iosem);  /* tell SDL thread we're done; refill the buffer. */
+    return 0;  /* success */
+}
+
+
+/* This function waits until it is possible to write a full sound buffer */
+static void
+JACK_WaitDevice(_THIS)
+{
+    if (SDL_AtomicGet(&this->enabled)) {
+        if (SDL_SemWait(this->hidden->iosem) == -1) {
+            SDL_OpenedAudioDeviceDisconnected(this);
+        }
+    }
+}
+
+static Uint8 *
+JACK_GetDeviceBuf(_THIS)
+{
+    return (Uint8 *) this->hidden->iobuffer;
+}
+
+
+static int
+jackProcessCaptureCallback(jack_nframes_t nframes, void *arg)
+{
+    SDL_AudioDevice *this = (SDL_AudioDevice *) arg;
+    if (SDL_AtomicGet(&this->enabled)) {
+        jack_port_t **ports = this->hidden->sdlports;
+        const int total_channels = this->spec.channels;
+        const int total_frames = this->spec.samples;
+        int channelsi;
+    
+        for (channelsi = 0; channelsi < total_channels; channelsi++) {
+            const float *src = (const float *) JACK_jack_port_get_buffer(ports[channelsi], nframes);
+            if (src) {
+                float *dst = ((float *) this->hidden->iobuffer) + channelsi;
+                int framesi;
+                for (framesi = 0; framesi < total_frames; framesi++) {
+                    *dst = *(src++);
+                    dst += total_channels;
+                }
+            }
+        }
+    }
+
+    SDL_SemPost(this->hidden->iosem);  /* tell SDL thread we're done; new buffer is ready! */
+    return 0;  /* success */
+}
+
+static int
+JACK_CaptureFromDevice(_THIS, void *buffer, int buflen)
+{
+    SDL_assert(buflen == this->spec.size);  /* we always fill a full buffer. */
+
+    /* Wait for JACK to fill the iobuffer */
+    if (SDL_SemWait(this->hidden->iosem) == -1) {
+        return -1;
+    }
+
+    SDL_memcpy(buffer, this->hidden->iobuffer, buflen);
+    return buflen;
+}
+
+static void
+JACK_FlushCapture(_THIS)
+{
+    SDL_SemWait(this->hidden->iosem);
+}
+
+
+static void
+JACK_CloseDevice(_THIS)
+{
+    if (this->hidden->client) {
+        JACK_jack_deactivate(this->hidden->client);
+
+        if (this->hidden->sdlports) {
+            const int channels = this->spec.channels;
+            int i;
+            for (i = 0; i < channels; i++) {
+                JACK_jack_port_unregister(this->hidden->client, this->hidden->sdlports[i]);
+            }
+            SDL_free(this->hidden->sdlports);
+        }
+
+        JACK_jack_client_close(this->hidden->client);
+    }
+
+    if (this->hidden->iosem) {
+        SDL_DestroySemaphore(this->hidden->iosem);
+    }
+
+    if (this->hidden->devports) {
+        JACK_jack_free(this->hidden->devports);
+    }
+
+    SDL_free(this->hidden->iobuffer);
+}
+
+static int
+JACK_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
+{
+    /* Note that JACK uses "output" for capture devices (they output audio
+        data to us) and "input" for playback (we input audio data to them).
+        Likewise, SDL's playback port will be "output" (we write data out)
+        and capture will be "input" (we read data in). */
+    const unsigned long sysportflags = iscapture ? JackPortIsOutput : JackPortIsInput;
+    const unsigned long sdlportflags = iscapture ? JackPortIsInput : JackPortIsOutput;
+    const JackProcessCallback callback = iscapture ? jackProcessCaptureCallback : jackProcessPlaybackCallback;
+    const char *sdlportstr = iscapture ? "input" : "output";
+    const char **devports = NULL;
+    jack_client_t *client = NULL;
+    jack_status_t status;
+    int channels = 0;
+    int i;
+
+    /* Initialize all variables that we clean on shutdown */
+    this->hidden = (struct SDL_PrivateAudioData *) SDL_calloc(1, sizeof (*this->hidden));
+    if (this->hidden == NULL) {
+        return SDL_OutOfMemory();
+    }
+
+    /* !!! FIXME: we _still_ need an API to specify an app name */
+    client = JACK_jack_client_open("SDL", JackNoStartServer, &status, NULL);
+    this->hidden->client = client;
+    if (client == NULL) {
+        return SDL_SetError("Can't open JACK client");
+    }
+
+    devports = JACK_jack_get_ports(client, NULL, NULL, JackPortIsPhysical | sysportflags);
+    this->hidden->devports = devports;
+    if (!devports || !devports[0]) {
+        return SDL_SetError("No physical JACK ports available");
+    }
+
+    while (devports[++channels]) {
+        /* spin to count devports */
+    }
+
+    /* !!! FIXME: docs say about buffer size: "This size may change, clients that depend on it must register a bufsize_callback so they will be notified if it does." */
+
+    /* Jack pretty much demands what it wants. */
+    this->spec.format = AUDIO_F32SYS;
+    this->spec.freq = JACK_jack_get_sample_rate(client);
+    this->spec.channels = channels;
+    this->spec.samples = JACK_jack_get_buffer_size(client);
+
+    SDL_CalculateAudioSpec(&this->spec);
+
+    this->hidden->iosem = SDL_CreateSemaphore(0);
+    if (!this->hidden->iosem) {
+        return -1;  /* error was set by SDL_CreateSemaphore */
+    }
+
+    this->hidden->iobuffer = (float *) SDL_calloc(1, this->spec.size);
+    if (!this->hidden->iobuffer) {
+        return SDL_OutOfMemory();
+    }
+
+    /* Build SDL's ports, which we will connect to the device ports. */
+    this->hidden->sdlports = (jack_port_t **) SDL_calloc(channels, sizeof (jack_port_t *));
+    if (this->hidden->sdlports == NULL) {
+        return SDL_OutOfMemory();
+    }
+
+    for (i = 0; i < channels; i++) {
+        char portname[32];
+        SDL_snprintf(portname, sizeof (portname), "sdl_jack_%s_%d", sdlportstr, i);
+        this->hidden->sdlports[i] = JACK_jack_port_register(client, portname, JACK_DEFAULT_AUDIO_TYPE, sdlportflags, 0);
+        if (this->hidden->sdlports[i] == NULL) {
+            return SDL_SetError("jack_port_register failed");
+        }
+    }
+
+    if (JACK_jack_set_process_callback(client, callback, this) != 0) {
+        return SDL_SetError("JACK: Couldn't set process callback");
+    }
+
+    JACK_jack_on_shutdown(client, jackShutdownCallback, this);
+
+    if (JACK_jack_activate(client) != 0) {
+        return SDL_SetError("Failed to activate JACK client");
+    }
+
+    /* once activated, we can connect all the ports. */
+    for (i = 0; i < channels; i++) {
+        const char *sdlport = JACK_jack_port_name(this->hidden->sdlports[i]);
+        const char *srcport = iscapture ? devports[i] : sdlport;
+        const char *dstport = iscapture ? sdlport : devports[i];
+        if (JACK_jack_connect(client, srcport, dstport) != 0) {
+            return SDL_SetError("Couldn't connect JACK ports: %s => %s", srcport, dstport);
+        }
+    }
+
+    /* don't need these anymore. */
+    this->hidden->devports = NULL;
+    JACK_jack_free(devports);
+
+    /* We're ready to rock and roll. :-) */
+    return 0;
+}
+
+static void
+JACK_Deinitialize(void)
+{
+    UnloadJackLibrary();
+}
+
+static int
+JACK_Init(SDL_AudioDriverImpl * impl)
+{
+    if (LoadJackLibrary() < 0) {
+        return 0;
+    } else {
+        /* Make sure a JACK server is running and available. */
+        jack_status_t status;
+        jack_client_t *client = JACK_jack_client_open("SDL", JackNoStartServer, &status, NULL);
+        if (client == NULL) {
+            UnloadJackLibrary();
+            return 0;
+        }
+        JACK_jack_client_close(client);
+    }
+
+    /* Set the function pointers */
+    impl->OpenDevice = JACK_OpenDevice;
+    impl->WaitDevice = JACK_WaitDevice;
+    impl->GetDeviceBuf = JACK_GetDeviceBuf;
+    impl->CloseDevice = JACK_CloseDevice;
+    impl->Deinitialize = JACK_Deinitialize;
+    impl->CaptureFromDevice = JACK_CaptureFromDevice;
+    impl->FlushCapture = JACK_FlushCapture;
+    impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
+    impl->OnlyHasDefaultCaptureDevice = SDL_TRUE;
+    impl->HasCaptureSupport = SDL_TRUE;
+
+    return 1;   /* this audio target is available. */
+}
+
+AudioBootStrap JACK_bootstrap = {
+    "jack", "JACK Audio Connection Kit", JACK_Init, 0
+};
+
+#endif /* SDL_AUDIO_DRIVER_JACK */
+
+/* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/jack/SDL_jackaudio.h

@@ -0,0 +1,42 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#ifndef SDL_jackaudio_h_
+#define SDL_jackaudio_h_
+
+#include <jack/jack.h>
+
+#include "../SDL_sysaudio.h"
+
+/* Hidden "this" pointer for the audio functions */
+#define _THIS SDL_AudioDevice *this
+
+struct SDL_PrivateAudioData
+{
+    jack_client_t *client;
+    SDL_sem *iosem;
+    float *iobuffer;
+    const char **devports;
+    jack_port_t **sdlports;
+};
+
+#endif /* SDL_jackaudio_h_ */
+
+/* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/nacl/SDL_naclaudio.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -45,29 +45,46 @@
 static void nacl_audio_callback(void* samples, uint32_t buffer_size, PP_TimeDelta latency, void* data);
 
 /* FIXME: Make use of latency if needed */
-static void nacl_audio_callback(void* samples, uint32_t buffer_size, PP_TimeDelta latency, void* data) {
+static void nacl_audio_callback(void* stream, uint32_t buffer_size, PP_TimeDelta latency, void* data) {
+    const int len = (int) buffer_size;
     SDL_AudioDevice* _this = (SDL_AudioDevice*) data;
+    SDL_AudioCallback callback = _this->callbackspec.callback;
     
     SDL_LockMutex(private->mutex);  /* !!! FIXME: is this mutex necessary? */
 
-    if (SDL_AtomicGet(&_this->enabled) && !SDL_AtomicGet(&_this->paused)) {
-        if (_this->convert.needed) {
-            SDL_LockMutex(_this->mixer_lock);
-            (*_this->spec.callback) (_this->spec.userdata,
-                                     (Uint8 *) _this->convert.buf,
-                                     _this->convert.len);
-            SDL_UnlockMutex(_this->mixer_lock);
-            SDL_ConvertAudio(&_this->convert);
-            SDL_memcpy(samples, _this->convert.buf, _this->convert.len_cvt);
-        } else {
-            SDL_LockMutex(_this->mixer_lock);
-            (*_this->spec.callback) (_this->spec.userdata, (Uint8 *) samples, buffer_size);
-            SDL_UnlockMutex(_this->mixer_lock);
+    /* Only do something if audio is enabled */
+    if (!SDL_AtomicGet(&_this->enabled) || SDL_AtomicGet(&_this->paused)) {
+        if (_this->stream) {
+            SDL_AudioStreamClear(_this->stream);
         }
-    } else {
-        SDL_memset(samples, _this->spec.silence, buffer_size);
+        SDL_memset(stream, _this->spec.silence, len);
+        return;
     }
-    
+
+    SDL_assert(_this->spec.size == len);
+
+    if (_this->stream == NULL) {  /* no conversion necessary. */
+        SDL_LockMutex(_this->mixer_lock);
+        callback(_this->callbackspec.userdata, stream, len);
+        SDL_UnlockMutex(_this->mixer_lock);
+    } else {  /* streaming/converting */
+        const int stream_len = _this->callbackspec.size;
+        while (SDL_AudioStreamAvailable(_this->stream) < len) {
+            callback(_this->callbackspec.userdata, _this->work_buffer, stream_len);
+            if (SDL_AudioStreamPut(_this->stream, _this->work_buffer, stream_len) == -1) {
+                SDL_AudioStreamClear(_this->stream);
+                SDL_AtomicSet(&_this->enabled, 0);
+                break;
+            }
+        }
+
+        const int got = SDL_AudioStreamGet(_this->stream, stream, len);
+        SDL_assert((got < 0) || (got == len));
+        if (got != len) {
+            SDL_memset(stream, _this->spec.silence, len);
+        }
+    }
+
     SDL_UnlockMutex(private->mutex);
 }
 
@@ -89,8 +106,7 @@ NACLAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture) {
     
     private = (SDL_PrivateAudioData *) SDL_calloc(1, (sizeof *private));
     if (private == NULL) {
-        SDL_OutOfMemory();
-        return 0;
+        return SDL_OutOfMemory();
     }
     
     private->mutex = SDL_CreateMutex();
@@ -114,7 +130,7 @@ NACLAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture) {
     /* Start audio playback while we are still on the main thread. */
     ppb_audio->StartPlayback(private->audio);
     
-    return 1;
+    return 0;
 }
 
 static int

Engine/lib/sdl/src/audio/nacl/SDL_naclaudio.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -21,8 +21,8 @@
 
 #include "../../SDL_internal.h"
 
-#ifndef _SDL_naclaudio_h
-#define _SDL_naclaudio_h
+#ifndef SDL_naclaudio_h_
+#define SDL_naclaudio_h_
 
 #include "SDL_audio.h"
 #include "../SDL_sysaudio.h"
@@ -38,4 +38,6 @@ typedef struct SDL_PrivateAudioData {
   PP_Resource audio;
 } SDL_PrivateAudioData;
 
-#endif /* _SDL_naclaudio_h */
+#endif /* SDL_naclaudio_h_ */
+
+/* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/nas/SDL_nasaudio.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -116,7 +116,7 @@ LoadNASLibrary(void)
             char *err = (char *) alloca(len);
             SDL_strlcpy(err, origerr, len);
             retval = -1;
-            SDL_SetError("NAS: SDL_LoadObject('%s') failed: %s\n",
+            SDL_SetError("NAS: SDL_LoadObject('%s') failed: %s",
                          nas_library, err);
         } else {
             retval = load_nas_syms();

Engine/lib/sdl/src/audio/nas/SDL_nasaudio.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -20,8 +20,8 @@
 */
 #include "../../SDL_internal.h"
 
-#ifndef _SDL_nasaudio_h
-#define _SDL_nasaudio_h
+#ifndef SDL_nasaudio_h_
+#define SDL_nasaudio_h_
 
 #ifdef __sgi
 #include <nas/audiolib.h>
@@ -51,6 +51,6 @@ struct SDL_PrivateAudioData
     struct timeval last_tv;
     int buf_free;
 };
-#endif /* _SDL_nasaudio_h */
+#endif /* SDL_nasaudio_h_ */
 
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/netbsd/SDL_netbsdaudio.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -20,10 +20,10 @@
 */
 #include "../../SDL_internal.h"
 
-#if SDL_AUDIO_DRIVER_BSD
+#if SDL_AUDIO_DRIVER_NETBSD
 
 /*
- * Driver for native OpenBSD/NetBSD audio(4).
+ * Driver for native NetBSD audio(4).
  * vedge@vedge.com.ar.
  */
 
@@ -38,9 +38,10 @@
 
 #include "SDL_timer.h"
 #include "SDL_audio.h"
+#include "../../core/unix/SDL_poll.h"
 #include "../SDL_audio_c.h"
 #include "../SDL_audiodev_c.h"
-#include "SDL_bsdaudio.h"
+#include "SDL_netbsdaudio.h"
 
 /* Use timer for synchronization */
 /* #define USE_TIMER_SYNC */
@@ -50,14 +51,14 @@
 
 
 static void
-BSDAUDIO_DetectDevices(void)
+NETBSDAUDIO_DetectDevices(void)
 {
     SDL_EnumUnixAudioDevices(0, NULL);
 }
 
 
 static void
-BSDAUDIO_Status(_THIS)
+NETBSDAUDIO_Status(_THIS)
 {
 #ifdef DEBUG_AUDIO
     /* *INDENT-OFF* */
@@ -121,7 +122,7 @@ BSDAUDIO_Status(_THIS)
 
 /* This function waits until it is possible to write a full sound buffer */
 static void
-BSDAUDIO_WaitDevice(_THIS)
+NETBSDAUDIO_WaitDevice(_THIS)
 {
 #ifndef USE_BLOCKING_WRITES     /* Not necessary when using blocking writes */
     /* See if we need to use timed audio synchronization */
@@ -134,18 +135,11 @@ BSDAUDIO_WaitDevice(_THIS)
             SDL_Delay(ticks);
         }
     } else {
-        /* Use select() for audio synchronization */
-        fd_set fdset;
-        struct timeval timeout;
-
-        FD_ZERO(&fdset);
-        FD_SET(this->hidden->audio_fd, &fdset);
-        timeout.tv_sec = 10;
-        timeout.tv_usec = 0;
+        /* Use SDL_IOReady() for audio synchronization */
 #ifdef DEBUG_AUDIO
         fprintf(stderr, "Waiting for audio to get ready\n");
 #endif
-        if (select(this->hidden->audio_fd + 1, NULL, &fdset, NULL, &timeout)
+        if (SDL_IOReady(this->hidden->audio_fd, SDL_TRUE, 10 * 1000)
             <= 0) {
             const char *message =
                 "Audio timeout - buggy audio driver? (disabled)";
@@ -169,7 +163,7 @@ BSDAUDIO_WaitDevice(_THIS)
 }
 
 static void
-BSDAUDIO_PlayDevice(_THIS)
+NETBSDAUDIO_PlayDevice(_THIS)
 {
     int written, p = 0;
 
@@ -208,19 +202,19 @@ BSDAUDIO_PlayDevice(_THIS)
 }
 
 static Uint8 *
-BSDAUDIO_GetDeviceBuf(_THIS)
+NETBSDAUDIO_GetDeviceBuf(_THIS)
 {
     return (this->hidden->mixbuf);
 }
 
 
 static int
-BSDAUDIO_CaptureFromDevice(_THIS, void *_buffer, int buflen)
+NETBSDAUDIO_CaptureFromDevice(_THIS, void *_buffer, int buflen)
 {
     Uint8 *buffer = (Uint8 *) _buffer;
     int br, p = 0;
 
-    /* Write the audio data, checking for EAGAIN on broken audio drivers */
+    /* Capture the audio data, checking for EAGAIN on broken audio drivers */
     do {
         br = read(this->hidden->audio_fd, buffer + p, buflen - p);
         if (br > 0)
@@ -243,7 +237,7 @@ BSDAUDIO_CaptureFromDevice(_THIS, void *_buffer, int buflen)
 }
 
 static void
-BSDAUDIO_FlushCapture(_THIS)
+NETBSDAUDIO_FlushCapture(_THIS)
 {
     audio_info_t info;
     size_t remain;
@@ -265,7 +259,7 @@ BSDAUDIO_FlushCapture(_THIS)
 }
 
 static void
-BSDAUDIO_CloseDevice(_THIS)
+NETBSDAUDIO_CloseDevice(_THIS)
 {
     if (this->hidden->audio_fd >= 0) {
         close(this->hidden->audio_fd);
@@ -275,7 +269,7 @@ BSDAUDIO_CloseDevice(_THIS)
 }
 
 static int
-BSDAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
+NETBSDAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
 {
     const int flags = iscapture ? OPEN_FLAGS_INPUT : OPEN_FLAGS_OUTPUT;
     SDL_AudioFormat format = 0;
@@ -383,24 +377,24 @@ BSDAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
         SDL_memset(this->hidden->mixbuf, this->spec.silence, this->spec.size);
     }
 
-    BSDAUDIO_Status(this);
+    NETBSDAUDIO_Status(this);
 
     /* We're ready to rock and roll. :-) */
     return 0;
 }
 
 static int
-BSDAUDIO_Init(SDL_AudioDriverImpl * impl)
+NETBSDAUDIO_Init(SDL_AudioDriverImpl * impl)
 {
     /* Set the function pointers */
-    impl->DetectDevices = BSDAUDIO_DetectDevices;
-    impl->OpenDevice = BSDAUDIO_OpenDevice;
-    impl->PlayDevice = BSDAUDIO_PlayDevice;
-    impl->WaitDevice = BSDAUDIO_WaitDevice;
-    impl->GetDeviceBuf = BSDAUDIO_GetDeviceBuf;
-    impl->CloseDevice = BSDAUDIO_CloseDevice;
-    impl->CaptureFromDevice = BSDAUDIO_CaptureFromDevice;
-    impl->FlushCapture = BSDAUDIO_FlushCapture;
+    impl->DetectDevices = NETBSDAUDIO_DetectDevices;
+    impl->OpenDevice = NETBSDAUDIO_OpenDevice;
+    impl->PlayDevice = NETBSDAUDIO_PlayDevice;
+    impl->WaitDevice = NETBSDAUDIO_WaitDevice;
+    impl->GetDeviceBuf = NETBSDAUDIO_GetDeviceBuf;
+    impl->CloseDevice = NETBSDAUDIO_CloseDevice;
+    impl->CaptureFromDevice = NETBSDAUDIO_CaptureFromDevice;
+    impl->FlushCapture = NETBSDAUDIO_FlushCapture;
 
     impl->HasCaptureSupport = SDL_TRUE;
     impl->AllowsArbitraryDeviceNames = 1;
@@ -409,10 +403,10 @@ BSDAUDIO_Init(SDL_AudioDriverImpl * impl)
 }
 
 
-AudioBootStrap BSD_AUDIO_bootstrap = {
-    "bsd", "BSD audio", BSDAUDIO_Init, 0
+AudioBootStrap NETBSDAUDIO_bootstrap = {
+    "netbsd", "NetBSD audio", NETBSDAUDIO_Init, 0
 };
 
-#endif /* SDL_AUDIO_DRIVER_BSD */
+#endif /* SDL_AUDIO_DRIVER_NETBSD */
 
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/netbsd/SDL_netbsdaudio.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -20,8 +20,8 @@
 */
 #include "../../SDL_internal.h"
 
-#ifndef _SDL_bsdaudio_h
-#define _SDL_bsdaudio_h
+#ifndef SDL_netbsdaudio_h_
+#define SDL_netbsdaudio_h_
 
 #include "../SDL_sysaudio.h"
 
@@ -32,20 +32,17 @@ struct SDL_PrivateAudioData
     /* The file descriptor for the audio device */
     int audio_fd;
 
-    /* The parent process id, to detect when application quits */
-    pid_t parent;
-
     /* Raw mixing buffer */
     Uint8 *mixbuf;
     int mixlen;
 
-    /* Support for audio timing using a timer, in addition to select() */
+    /* Support for audio timing using a timer, in addition to SDL_IOReady() */
     float frame_ticks;
     float next_frame;
 };
 
 #define FUDGE_TICKS 10      /* The scheduler overhead ticks per frame */
 
-#endif /* _SDL_bsdaudio_h */
+#endif /* SDL_netbsdaudio_h_ */
 
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/paudio/SDL_paudio.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -36,9 +36,10 @@
 #include "SDL_audio.h"
 #include "SDL_stdinc.h"
 #include "../SDL_audio_c.h"
+#include "../../core/unix/SDL_poll.h"
 #include "SDL_paudio.h"
 
-#define DEBUG_AUDIO 0
+/* #define DEBUG_AUDIO */
 
 /* A conflict within AIX 4.3.3 <sys/> headers and probably others as well.
  * I guess nobody ever uses audio... Shame over AIX header files.  */
@@ -137,44 +138,31 @@ PAUDIO_WaitDevice(_THIS)
             SDL_Delay(ticks);
         }
     } else {
+        int timeoutMS;
         audio_buffer paud_bufinfo;
 
-        /* Use select() for audio synchronization */
-        struct timeval timeout;
-        FD_ZERO(&fdset);
-        FD_SET(this->hidden->audio_fd, &fdset);
-
         if (ioctl(this->hidden->audio_fd, AUDIO_BUFFER, &paud_bufinfo) < 0) {
 #ifdef DEBUG_AUDIO
             fprintf(stderr, "Couldn't get audio buffer information\n");
 #endif
-            timeout.tv_sec = 10;
-            timeout.tv_usec = 0;
+            timeoutMS = 10 * 1000;
         } else {
-            long ms_in_buf = paud_bufinfo.write_buf_time;
-            timeout.tv_sec = ms_in_buf / 1000;
-            ms_in_buf = ms_in_buf - timeout.tv_sec * 1000;
-            timeout.tv_usec = ms_in_buf * 1000;
+            timeoutMS = paud_bufinfo.write_buf_time;
 #ifdef DEBUG_AUDIO
-            fprintf(stderr,
-                    "Waiting for write_buf_time=%ld,%ld\n",
-                    timeout.tv_sec, timeout.tv_usec);
+            fprintf(stderr, "Waiting for write_buf_time=%d ms\n", timeoutMS);
 #endif
         }
 
 #ifdef DEBUG_AUDIO
         fprintf(stderr, "Waiting for audio to get ready\n");
 #endif
-        if (select(this->hidden->audio_fd + 1, NULL, &fdset, NULL, &timeout)
-            <= 0) {
-            const char *message =
-                "Audio timeout - buggy audio driver? (disabled)";
+        if (SDL_IOReady(this->hidden->audio_fd, SDL_TRUE, timeoutMS) <= 0) {
             /*
              * In general we should never print to the screen,
              * but in this case we have no other way of letting
              * the user know what happened.
              */
-            fprintf(stderr, "SDL: %s - %s\n", strerror(errno), message);
+            fprintf(stderr, "SDL: %s - Audio timeout - buggy audio driver? (disabled)\n", strerror(errno));
             SDL_OpenedAudioDeviceDisconnected(this);
             /* Don't try to close - may hang */
             this->hidden->audio_fd = -1;
@@ -245,7 +233,6 @@ PAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
     SDL_AudioFormat test_format;
     audio_init paud_init;
     audio_buffer paud_bufinfo;
-    audio_status paud_status;
     audio_control paud_control;
     audio_change paud_change;
     int fd = -1;
@@ -487,7 +474,7 @@ PAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
         return SDL_SetError("Can't start audio play");
     }
 
-    /* Check to see if we need to use select() workaround */
+    /* Check to see if we need to use SDL_IOReady() workaround */
     if (workaround != NULL) {
         this->hidden->frame_ticks = (float) (this->spec.samples * 1000) /
             this->spec.freq;
@@ -510,11 +497,11 @@ PAUDIO_Init(SDL_AudioDriverImpl * impl)
     close(fd);
 
     /* Set the function pointers */
-    impl->OpenDevice = DSP_OpenDevice;
-    impl->PlayDevice = DSP_PlayDevice;
-    impl->PlayDevice = DSP_WaitDevice;
-    impl->GetDeviceBuf = DSP_GetDeviceBuf;
-    impl->CloseDevice = DSP_CloseDevice;
+    impl->OpenDevice = PAUDIO_OpenDevice;
+    impl->PlayDevice = PAUDIO_PlayDevice;
+    impl->PlayDevice = PAUDIO_WaitDevice;
+    impl->GetDeviceBuf = PAUDIO_GetDeviceBuf;
+    impl->CloseDevice = PAUDIO_CloseDevice;
     impl->OnlyHasDefaultOutputDevice = 1;       /* !!! FIXME: add device enum! */
 
     return 1;   /* this audio target is available. */

Engine/lib/sdl/src/audio/paudio/SDL_paudio.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -20,8 +20,8 @@
 */
 #include "../../SDL_internal.h"
 
-#ifndef _SDL_paudaudio_h
-#define _SDL_paudaudio_h
+#ifndef SDL_paudio_h_
+#define SDL_paudio_h_
 
 #include "../SDL_sysaudio.h"
 
@@ -37,11 +37,12 @@ struct SDL_PrivateAudioData
     Uint8 *mixbuf;
     int mixlen;
 
-    /* Support for audio timing using a timer, in addition to select() */
+    /* Support for audio timing using a timer, in addition to SDL_IOReady() */
     float frame_ticks;
     float next_frame;
 };
 #define FUDGE_TICKS 10      /* The scheduler overhead ticks per frame */
 
-#endif /* _SDL_paudaudio_h */
+#endif /* SDL_paudio_h_ */
+
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/psp/SDL_pspaudio.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -80,6 +80,7 @@ PSPAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
     if (this->spec.channels == 1) {
         format = PSP_AUDIO_FORMAT_MONO;
     } else {
+        this->spec.channels = 2;
         format = PSP_AUDIO_FORMAT_STEREO;
     }
     this->hidden->channel = sceAudioChReserve(PSP_AUDIO_NEXT_CHANNEL, this->spec.samples, format);

Engine/lib/sdl/src/audio/psp/SDL_pspaudio.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -19,8 +19,8 @@
   3. This notice may not be removed or altered from any source distribution.
 */
 
-#ifndef _SDL_pspaudio_h
-#define _SDL_pspaudio_h
+#ifndef SDL_pspaudio_h_
+#define SDL_pspaudio_h_
 
 #include "../SDL_sysaudio.h"
 
@@ -40,6 +40,6 @@ struct SDL_PrivateAudioData {
     int     next_buffer;
 };
 
-#endif /* _SDL_pspaudio_h */
-/* vim: ts=4 sw=4
- */
+#endif /* SDL_pspaudio_h_ */
+
+/* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/pulseaudio/SDL_pulseaudio.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -37,7 +37,6 @@
 #endif
 #include <unistd.h>
 #include <sys/types.h>
-#include <errno.h>
 #include <pulse/pulseaudio.h>
 
 #include "SDL_timer.h"
@@ -250,12 +249,6 @@ getAppName(void)
     return "SDL Application";  /* oh well. */
 }
 
-static void
-stream_operation_complete_no_op(pa_stream *s, int success, void *userdata)
-{
-    /* no-op for pa_stream_drain(), etc, to use for callback. */
-}
-
 static void
 WaitForPulseOperation(pa_mainloop *mainloop, pa_operation *o)
 {
@@ -427,6 +420,8 @@ static void
 PULSEAUDIO_FlushCapture(_THIS)
 {
     struct SDL_PrivateAudioData *h = this->hidden;
+    const void *data = NULL;
+    size_t nbytes = 0;
 
     if (h->capturebuf != NULL) {
         PULSEAUDIO_pa_stream_drop(h->stream);
@@ -434,7 +429,22 @@ PULSEAUDIO_FlushCapture(_THIS)
         h->capturelen = 0;
     }
 
-    WaitForPulseOperation(h->mainloop, PULSEAUDIO_pa_stream_flush(h->stream, stream_operation_complete_no_op, NULL));
+    while (SDL_TRUE) {
+        if (PULSEAUDIO_pa_context_get_state(h->context) != PA_CONTEXT_READY ||
+            PULSEAUDIO_pa_stream_get_state(h->stream) != PA_STREAM_READY ||
+            PULSEAUDIO_pa_mainloop_iterate(h->mainloop, 1, NULL) < 0) {
+            SDL_OpenedAudioDeviceDisconnected(this);
+            return;  /* uhoh, pulse failed! */
+        }
+
+        if (PULSEAUDIO_pa_stream_readable_size(h->stream) == 0) {
+            break;  /* no data available, so we're done. */
+        }
+
+        /* a new fragment is available! Just dump it. */
+        PULSEAUDIO_pa_stream_peek(h->stream, &data, &nbytes);
+        PULSEAUDIO_pa_stream_drop(h->stream);  /* drop this fragment. */
+    }
 }
 
 static void

Engine/lib/sdl/src/audio/pulseaudio/SDL_pulseaudio.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -20,8 +20,8 @@
 */
 #include "../../SDL_internal.h"
 
-#ifndef _SDL_pulseaudio_h
-#define _SDL_pulseaudio_h
+#ifndef SDL_pulseaudio_h_
+#define SDL_pulseaudio_h_
 
 #include <pulse/simple.h>
 
@@ -47,6 +47,6 @@ struct SDL_PrivateAudioData
     int capturelen;
 };
 
-#endif /* _SDL_pulseaudio_h */
+#endif /* SDL_pulseaudio_h_ */
 
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/qsa/SDL_qsa_audio.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -45,6 +45,7 @@
 
 #include "SDL_timer.h"
 #include "SDL_audio.h"
+#include "../../core/unix/SDL_poll.h"
 #include "../SDL_audio_c.h"
 #include "SDL_qsa_audio.h"
 
@@ -56,24 +57,6 @@
 #define DEFAULT_CPARAMS_FRAGS_MIN 1
 #define DEFAULT_CPARAMS_FRAGS_MAX 1
 
-#define QSA_NO_WORKAROUNDS  0x00000000
-#define QSA_MMAP_WORKAROUND 0x00000001
-
-struct BuggyCards
-{
-    char *cardname;
-    unsigned long bugtype;
-};
-
-#define QSA_WA_CARDS             3
-#define QSA_MAX_CARD_NAME_LENGTH 33
-
-struct BuggyCards buggycards[QSA_WA_CARDS] = {
-    {"Sound Blaster Live!", QSA_MMAP_WORKAROUND},
-    {"Vortex 8820", QSA_MMAP_WORKAROUND},
-    {"Vortex 8830", QSA_MMAP_WORKAROUND},
-};
-
 /* List of found devices */
 #define QSA_MAX_DEVICES       32
 #define QSA_MAX_NAME_LENGTH   81+16     /* Hardcoded in QSA, can't be changed */
@@ -97,40 +80,16 @@ QSA_SetError(const char *fn, int status)
     return SDL_SetError("QSA: %s() failed: %s", fn, snd_strerror(status));
 }
 
-/* card names check to apply the workarounds */
-static int
-QSA_CheckBuggyCards(_THIS, unsigned long checkfor)
-{
-    char scardname[QSA_MAX_CARD_NAME_LENGTH];
-    int it;
-
-    if (snd_card_get_name
-        (this->hidden->cardno, scardname, QSA_MAX_CARD_NAME_LENGTH - 1) < 0) {
-        return 0;
-    }
-
-    for (it = 0; it < QSA_WA_CARDS; it++) {
-        if (SDL_strcmp(buggycards[it].cardname, scardname) == 0) {
-            if (buggycards[it].bugtype == checkfor) {
-                return 1;
-            }
-        }
-    }
-
-    return 0;
-}
-
 /* !!! FIXME: does this need to be here? Does the SDL version not work? */
 static void
 QSA_ThreadInit(_THIS)
 {
-    struct sched_param param;
-    int status;
-
     /* Increase default 10 priority to 25 to avoid jerky sound */
-    status = SchedGet(0, 0, &param);
-    param.sched_priority = param.sched_curpriority + 15;
-    status = SchedSet(0, 0, SCHED_NOCHANGE, &param);
+    struct sched_param param;
+    if (SchedGet(0, 0, &param) != -1) {
+        param.sched_priority = param.sched_curpriority + 15;
+        SchedSet(0, 0, SCHED_NOCHANGE, &param);
+    }
 }
 
 /* PCM channel parameters initialize function */
@@ -155,67 +114,25 @@ QSA_InitAudioParams(snd_pcm_channel_params_t * cpars)
 static void
 QSA_WaitDevice(_THIS)
 {
-    fd_set wfds;
-    fd_set rfds;
-    int selectret;
-    struct timeval timeout;
+    int result;
 
-    if (!this->hidden->iscapture) {
-        FD_ZERO(&wfds);
-        FD_SET(this->hidden->audio_fd, &wfds);
-    } else {
-        FD_ZERO(&rfds);
-        FD_SET(this->hidden->audio_fd, &rfds);
-    }
-
-    do {
-        /* Setup timeout for playing one fragment equal to 2 seconds          */
-        /* If timeout occured than something wrong with hardware or driver    */
-        /* For example, Vortex 8820 audio driver stucks on second DAC because */
-        /* it doesn't exist !                                                 */
-        timeout.tv_sec = 2;
-        timeout.tv_usec = 0;
+    /* Setup timeout for playing one fragment equal to 2 seconds          */
+    /* If timeout occured than something wrong with hardware or driver    */
+    /* For example, Vortex 8820 audio driver stucks on second DAC because */
+    /* it doesn't exist !                                                 */
+    result = SDL_IOReady(this->hidden->audio_fd, !this->hidden->iscapture, 2 * 1000);
+    switch (result) {
+    case -1:
+        SDL_SetError("QSA: SDL_IOReady() failed: %s", strerror(errno));
+        break;
+    case 0:
+        SDL_SetError("QSA: timeout on buffer waiting occured");
+        this->hidden->timeout_on_wait = 1;
+        break;
+    default:
         this->hidden->timeout_on_wait = 0;
-
-        if (!this->hidden->iscapture) {
-            selectret =
-                select(this->hidden->audio_fd + 1, NULL, &wfds, NULL,
-                       &timeout);
-        } else {
-            selectret =
-                select(this->hidden->audio_fd + 1, &rfds, NULL, NULL,
-                       &timeout);
-        }
-
-        switch (selectret) {
-        case -1:
-            {
-                SDL_SetError("QSA: select() failed: %s", strerror(errno));
-                return;
-            }
-            break;
-        case 0:
-            {
-                SDL_SetError("QSA: timeout on buffer waiting occured");
-                this->hidden->timeout_on_wait = 1;
-                return;
-            }
-            break;
-        default:
-            {
-                if (!this->hidden->iscapture) {
-                    if (FD_ISSET(this->hidden->audio_fd, &wfds)) {
-                        return;
-                    }
-                } else {
-                    if (FD_ISSET(this->hidden->audio_fd, &rfds)) {
-                        return;
-                    }
-                }
-            }
-            break;
-        }
-    } while (1);
+        break;
+    }
 }
 
 static void
@@ -357,7 +274,6 @@ QSA_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
     if (this->hidden == NULL) {
         return SDL_OutOfMemory();
     }
-    SDL_zerop(this->hidden);
 
     /* Initialize channel transfer parameters to default */
     QSA_InitAudioParams(&cparams);
@@ -371,13 +287,13 @@ QSA_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
         this->hidden->cardno = device->cardno;
         status = snd_pcm_open(&this->hidden->audio_handle,
                               device->cardno, device->deviceno,
-                              iscapture ? SND_PCM_OPEN_PLAYBACK : SND_PCM_OPEN_CAPTURE);
+                              iscapture ? SND_PCM_OPEN_CAPTURE : SND_PCM_OPEN_PLAYBACK);
     } else {
         /* Open system default audio device */
         status = snd_pcm_open_preferred(&this->hidden->audio_handle,
                                         &this->hidden->cardno,
                                         &this->hidden->deviceno,
-                                        iscapture ? SND_PCM_OPEN_PLAYBACK : SND_PCM_OPEN_CAPTURE);
+                                        iscapture ? SND_PCM_OPEN_CAPTURE : SND_PCM_OPEN_PLAYBACK);
     }
 
     /* Check if requested device is opened */
@@ -386,16 +302,6 @@ QSA_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
         return QSA_SetError("snd_pcm_open", status);
     }
 
-    if (!QSA_CheckBuggyCards(this, QSA_MMAP_WORKAROUND)) {
-        /* Disable QSA MMAP plugin for buggy audio drivers */
-        status =
-            snd_pcm_plugin_set_disable(this->hidden->audio_handle,
-                                       PLUGIN_DISABLE_MMAP);
-        if (status < 0) {
-            return QSA_SetError("snd_pcm_plugin_set_disable", status);
-        }
-    }
-
     /* Try for a closest match on audio format */
     format = 0;
     /* can't use format as SND_PCM_SFMT_U8 = 0 in qsa */
@@ -494,7 +400,7 @@ QSA_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
     /* Setup the transfer parameters according to cparams */
     status = snd_pcm_plugin_params(this->hidden->audio_handle, &cparams);
     if (status < 0) {
-        return QSA_SetError("snd_pcm_channel_params", status);
+        return QSA_SetError("snd_pcm_plugin_params", status);
     }
 
     /* Make sure channel is setup right one last time */
@@ -722,9 +628,6 @@ QSA_Deinitialize(void)
 static int
 QSA_Init(SDL_AudioDriverImpl * impl)
 {
-    snd_pcm_t *handle = NULL;
-    int32_t status = 0;
-
     /* Clear devices array */
     SDL_zero(qsa_playback_device);
     SDL_zero(qsa_capture_device);
@@ -745,20 +648,12 @@ QSA_Init(SDL_AudioDriverImpl * impl)
     impl->LockDevice = NULL;
     impl->UnlockDevice = NULL;
 
-    impl->OnlyHasDefaultOutputDevice = 0;
     impl->ProvidesOwnCallbackThread = 0;
     impl->SkipMixerLock = 0;
     impl->HasCaptureSupport = 1;
     impl->OnlyHasDefaultOutputDevice = 0;
     impl->OnlyHasDefaultCaptureDevice = 0;
 
-    /* Check if io-audio manager is running or not */
-    status = snd_cards();
-    if (status == 0) {
-        /* if no, return immediately */
-        return 1;
-    }
-
     return 1;   /* this audio target is available. */
 }
 

Engine/lib/sdl/src/audio/qsa/SDL_qsa_audio.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages

Engine/lib/sdl/src/audio/sdlgenaudiocvt.pl

@@ -1,761 +0,0 @@
-#!/usr/bin/perl -w
-
-use warnings;
-use strict;
-
-my @audiotypes = qw(
-    U8
-    S8
-    U16LSB
-    S16LSB
-    U16MSB
-    S16MSB
-    S32LSB
-    S32MSB
-    F32LSB
-    F32MSB
-);
-
-my @channels = ( 1, 2, 4, 6, 8 );
-my %funcs;
-my $custom_converters = 0;
-
-
-sub getTypeConvertHashId {
-    my ($from, $to) = @_;
-    return "TYPECONVERTER $from/$to";
-}
-
-
-sub getResamplerHashId {
-    my ($from, $channels, $upsample, $multiple) = @_;
-    return "RESAMPLER $from/$channels/$upsample/$multiple";
-}
-
-
-sub outputHeader {
-    print <<EOF;
-/* DO NOT EDIT!  This file is generated by sdlgenaudiocvt.pl */
-/*
-  Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken\@libsdl.org>
-
-  This software is provided 'as-is', without any express or implied
-  warranty.  In no event will the authors be held liable for any damages
-  arising from the use of this software.
-
-  Permission is granted to anyone to use this software for any purpose,
-  including commercial applications, and to alter it and redistribute it
-  freely, subject to the following restrictions:
-
-  1. The origin of this software must not be misrepresented; you must not
-     claim that you wrote the original software. If you use this software
-     in a product, an acknowledgment in the product documentation would be
-     appreciated but is not required.
-  2. Altered source versions must be plainly marked as such, and must not be
-     misrepresented as being the original software.
-  3. This notice may not be removed or altered from any source distribution.
-*/
-
-#include "../SDL_internal.h"
-#include "SDL_audio.h"
-#include "SDL_audio_c.h"
-
-#ifndef DEBUG_CONVERT
-#define DEBUG_CONVERT 0
-#endif
-
-
-/* If you can guarantee your data and need space, you can eliminate code... */
-
-/* Just build the arbitrary resamplers if you're saving code space. */
-#ifndef LESS_RESAMPLERS
-#define LESS_RESAMPLERS 0
-#endif
-
-/* Don't build any resamplers if you're REALLY saving code space. */
-#ifndef NO_RESAMPLERS
-#define NO_RESAMPLERS 0
-#endif
-
-/* Don't build any type converters if you're saving code space. */
-#ifndef NO_CONVERTERS
-#define NO_CONVERTERS 0
-#endif
-
-
-/* *INDENT-OFF* */
-
-EOF
-
-    my @vals = ( 127, 32767, 2147483647 );
-    foreach (@vals) {
-        my $val = $_;
-        my $fval = 1.0 / $val;
-        print("#define DIVBY${val} ${fval}f\n");
-    }
-
-    print("\n");
-}
-
-sub outputFooter {
-    print <<EOF;
-/* $custom_converters converters generated. */
-
-/* *INDENT-ON* */
-
-/* vi: set ts=4 sw=4 expandtab: */
-EOF
-}
-
-sub splittype {
-    my $t = shift;
-    my ($signed, $size, $endian) = $t =~ /([USF])(\d+)([LM]SB|)/;
-    my $float = ($signed eq 'F') ? 1 : 0;
-    $signed = (($float) or ($signed eq 'S')) ? 1 : 0;
-    $endian = 'NONE' if ($endian eq '');
-
-    my $ctype = '';
-    if ($float) {
-        $ctype = (($size == 32) ? 'float' : 'double');
-    } else {
-        $ctype = (($signed) ? 'S' : 'U') . "int${size}";
-    }
-
-    return ($signed, $float, $size, $endian, $ctype);
-}
-
-sub getSwapFunc {
-    my ($size, $signed, $float, $endian, $val) = @_;
-    my $BEorLE = (($endian eq 'MSB') ? 'BE' : 'LE');
-    my $code = '';
-
-    if ($float) {
-        $code = "SDL_SwapFloat${BEorLE}($val)";
-    } else {
-        if ($size > 8) {
-            $code = "SDL_Swap${BEorLE}${size}($val)";
-        } else {
-            $code = $val;
-        }
-
-        if (($signed) and (!$float)) {
-            $code = "((Sint${size}) $code)";
-        }
-    }
-
-    return "${code}";
-}
-
-
-sub maxIntVal {
-    my $size = shift;
-    if ($size == 8) {
-        return 0x7F;
-    } elsif ($size == 16) {
-        return 0x7FFF;
-    } elsif ($size == 32) {
-        return 0x7FFFFFFF;
-    }
-
-    die("bug in script.\n");
-}
-
-sub getFloatToIntMult {
-    my $size = shift;
-    my $val = maxIntVal($size) . '.0';
-    $val .= 'f' if ($size < 32);
-    return $val;
-}
-
-sub getIntToFloatDivBy {
-    my $size = shift;
-    return 'DIVBY' . maxIntVal($size);
-}
-
-sub getSignFlipVal {
-    my $size = shift;
-    if ($size == 8) {
-        return '0x80';
-    } elsif ($size == 16) {
-        return '0x8000';
-    } elsif ($size == 32) {
-        return '0x80000000';
-    }
-
-    die("bug in script.\n");
-}
-
-sub buildCvtFunc {
-    my ($from, $to) = @_;
-    my ($fsigned, $ffloat, $fsize, $fendian, $fctype) = splittype($from);
-    my ($tsigned, $tfloat, $tsize, $tendian, $tctype) = splittype($to);
-    my $diffs = 0;
-    $diffs++ if ($fsize != $tsize);
-    $diffs++ if ($fsigned != $tsigned);
-    $diffs++ if ($ffloat != $tfloat);
-    $diffs++ if ($fendian ne $tendian);
-
-    return if ($diffs == 0);
-
-    my $hashid = getTypeConvertHashId($from, $to);
-    if (1) { # !!! FIXME: if ($diffs > 1) {
-        my $sym = "SDL_Convert_${from}_to_${to}";
-        $funcs{$hashid} = $sym;
-        $custom_converters++;
-
-        # Always unsigned for ints, for possible byteswaps.
-        my $srctype = (($ffloat) ? 'float' : "Uint${fsize}");
-
-        print <<EOF;
-static void SDLCALL
-${sym}(SDL_AudioCVT * cvt, SDL_AudioFormat format)
-{
-    int i;
-    const $srctype *src;
-    $tctype *dst;
-
-#if DEBUG_CONVERT
-    fprintf(stderr, "Converting AUDIO_${from} to AUDIO_${to}.\\n");
-#endif
-
-EOF
-
-        if ($fsize < $tsize) {
-            my $mult = $tsize / $fsize;
-            print <<EOF;
-    src = ((const $srctype *) (cvt->buf + cvt->len_cvt)) - 1;
-    dst = (($tctype *) (cvt->buf + cvt->len_cvt * $mult)) - 1;
-    for (i = cvt->len_cvt / sizeof ($srctype); i; --i, --src, --dst) {
-EOF
-        } else {
-            print <<EOF;
-    src = (const $srctype *) cvt->buf;
-    dst = ($tctype *) cvt->buf;
-    for (i = cvt->len_cvt / sizeof ($srctype); i; --i, ++src, ++dst) {
-EOF
-        }
-
-        # Have to convert to/from float/int.
-        # !!! FIXME: cast through double for int32<->float?
-        my $code = getSwapFunc($fsize, $fsigned, $ffloat, $fendian, '*src');
-        if ($ffloat != $tfloat) {
-            if ($ffloat) {
-                my $mult = getFloatToIntMult($tsize);
-                if (!$tsigned) {   # bump from -1.0f/1.0f to 0.0f/2.0f
-                    $code = "($code + 1.0f)";
-                }
-                $code = "(($tctype) ($code * $mult))";
-            } else {
-                # $divby will be the reciprocal, to avoid pipeline stalls
-                #  from floating point division...so multiply it.
-                my $divby = getIntToFloatDivBy($fsize);
-                $code = "(((float) $code) * $divby)";
-                if (!$fsigned) {   # bump from 0.0f/2.0f to -1.0f/1.0f.
-                    $code = "($code - 1.0f)";
-                }
-            }
-        } else {
-            # All integer conversions here.
-            if ($fsigned != $tsigned) {
-                my $signflipval = getSignFlipVal($fsize);
-                $code = "(($code) ^ $signflipval)";
-            }
-
-            my $shiftval = abs($fsize - $tsize);
-            if ($fsize < $tsize) {
-                $code = "((($tctype) $code) << $shiftval)";
-            } elsif ($fsize > $tsize) {
-                $code = "(($tctype) ($code >> $shiftval))";
-            }
-        }
-
-        my $swap = getSwapFunc($tsize, $tsigned, $tfloat, $tendian, 'val');
-
-        print <<EOF;
-        const $tctype val = $code;
-        *dst = ${swap};
-    }
-
-EOF
-
-        if ($fsize > $tsize) {
-            my $divby = $fsize / $tsize;
-            print("    cvt->len_cvt /= $divby;\n");
-        } elsif ($fsize < $tsize) {
-            my $mult = $tsize / $fsize;
-            print("    cvt->len_cvt *= $mult;\n");
-        }
-
-        print <<EOF;
-    if (cvt->filters[++cvt->filter_index]) {
-        cvt->filters[cvt->filter_index] (cvt, AUDIO_$to);
-    }
-}
-
-EOF
-
-    } else {
-        if ($fsigned != $tsigned) {
-            $funcs{$hashid} = 'SDL_ConvertSigned';
-        } elsif ($ffloat != $tfloat) {
-            $funcs{$hashid} = 'SDL_ConvertFloat';
-        } elsif ($fsize != $tsize) {
-            $funcs{$hashid} = 'SDL_ConvertSize';
-        } elsif ($fendian ne $tendian) {
-            $funcs{$hashid} = 'SDL_ConvertEndian';
-        } else {
-            die("error in script.\n");
-        }
-    }
-}
-
-
-sub buildTypeConverters {
-    print "#if !NO_CONVERTERS\n\n";
-    foreach (@audiotypes) {
-        my $from = $_;
-        foreach (@audiotypes) {
-            my $to = $_;
-            buildCvtFunc($from, $to);
-        }
-    }
-    print "#endif  /* !NO_CONVERTERS */\n\n\n";
-
-    print "const SDL_AudioTypeFilters sdl_audio_type_filters[] =\n{\n";
-    print "#if !NO_CONVERTERS\n";
-    foreach (@audiotypes) {
-        my $from = $_;
-        foreach (@audiotypes) {
-            my $to = $_;
-            if ($from ne $to) {
-                my $hashid = getTypeConvertHashId($from, $to);
-                my $sym = $funcs{$hashid};
-                print("    { AUDIO_$from, AUDIO_$to, $sym },\n");
-            }
-        }
-    }
-    print "#endif  /* !NO_CONVERTERS */\n";
-
-    print("    { 0, 0, NULL }\n");
-    print "};\n\n\n";
-}
-
-sub getBiggerCtype {
-    my ($isfloat, $size) = @_;
-
-    if ($isfloat) {
-        if ($size == 32) {
-            return 'double';
-        }
-        die("bug in script.\n");
-    }
-
-    if ($size == 8) {
-        return 'Sint16';
-    } elsif ($size == 16) {
-        return 'Sint32'
-    } elsif ($size == 32) {
-        return 'Sint64'
-    }
-
-    die("bug in script.\n");
-}
-
-
-# These handle arbitrary resamples...44100Hz to 48000Hz, for example.
-# Man, this code is skanky.
-sub buildArbitraryResampleFunc {
-    # !!! FIXME: we do a lot of unnecessary and ugly casting in here, due to getSwapFunc().
-    my ($from, $channels, $upsample) = @_;
-    my ($fsigned, $ffloat, $fsize, $fendian, $fctype) = splittype($from);
-
-    my $bigger = getBiggerCtype($ffloat, $fsize);
-    my $interp = ($ffloat) ? '* 0.5' : '>> 1';
-
-    my $resample = ($upsample) ? 'Upsample' : 'Downsample';
-    my $hashid = getResamplerHashId($from, $channels, $upsample, 0);
-    my $sym = "SDL_${resample}_${from}_${channels}c";
-    $funcs{$hashid} = $sym;
-    $custom_converters++;
-
-    my $fudge = $fsize * $channels * 2;  # !!! FIXME
-    my $eps_adjust = ($upsample) ? 'dstsize' : 'srcsize';
-    my $incr = '';
-    my $incr2 = '';
-    my $block_align = $channels * $fsize/8;
-
-
-    # !!! FIXME: DEBUG_CONVERT should report frequencies.
-    print <<EOF;
-static void SDLCALL
-${sym}(SDL_AudioCVT * cvt, SDL_AudioFormat format)
-{
-#if DEBUG_CONVERT
-    fprintf(stderr, "$resample arbitrary (x%f) AUDIO_${from}, ${channels} channels.\\n", cvt->rate_incr);
-#endif
-
-    const int srcsize = cvt->len_cvt - $fudge;
-    const int dstsize = (int) (((double)(cvt->len_cvt/${block_align})) * cvt->rate_incr) * ${block_align};
-    register int eps = 0;
-EOF
-
-    my $endcomparison = '!=';
-
-    # Upsampling (growing the buffer) needs to work backwards, since we
-    #  overwrite the buffer as we go.
-    if ($upsample) {
-        $endcomparison = '>=';  # dst > target
-        print <<EOF;
-    $fctype *dst = (($fctype *) (cvt->buf + dstsize)) - $channels;
-    const $fctype *src = (($fctype *) (cvt->buf + cvt->len_cvt)) - $channels;
-    const $fctype *target = ((const $fctype *) cvt->buf);
-EOF
-    } else {
-        $endcomparison = '<';  # dst < target
-        print <<EOF;
-    $fctype *dst = ($fctype *) cvt->buf;
-    const $fctype *src = ($fctype *) cvt->buf;
-    const $fctype *target = (const $fctype *) (cvt->buf + dstsize);
-EOF
-    }
-
-    for (my $i = 0; $i < $channels; $i++) {
-        my $idx = ($upsample) ? (($channels - $i) - 1) : $i;
-        my $val = getSwapFunc($fsize, $fsigned, $ffloat, $fendian, "src[$idx]");
-        print <<EOF;
-    $fctype sample${idx} = $val;
-EOF
-    }
-
-    for (my $i = 0; $i < $channels; $i++) {
-        my $idx = ($upsample) ? (($channels - $i) - 1) : $i;
-        print <<EOF;
-    $fctype last_sample${idx} = sample${idx};
-EOF
-    }
-
-    print <<EOF;
-    while (dst $endcomparison target) {
-EOF
-
-    if ($upsample) {
-        for (my $i = 0; $i < $channels; $i++) {
-            # !!! FIXME: don't do this swap every write, just when the samples change.
-            my $idx = (($channels - $i) - 1);
-            my $val = getSwapFunc($fsize, $fsigned, $ffloat, $fendian, "sample${idx}");
-            print <<EOF;
-        dst[$idx] = $val;
-EOF
-        }
-
-        $incr = ($channels == 1) ? 'dst--' : "dst -= $channels";
-        $incr2 = ($channels == 1) ? 'src--' : "src -= $channels";
-
-        print <<EOF;
-        $incr;
-        eps += srcsize;
-        if ((eps << 1) >= dstsize) {
-            $incr2;
-EOF
-    } else {  # downsample.
-        $incr = ($channels == 1) ? 'src++' : "src += $channels";
-        print <<EOF;
-        $incr;
-        eps += dstsize;
-        if ((eps << 1) >= srcsize) {
-EOF
-        for (my $i = 0; $i < $channels; $i++) {
-            my $val = getSwapFunc($fsize, $fsigned, $ffloat, $fendian, "sample${i}");
-            print <<EOF;
-            dst[$i] = $val;
-EOF
-        }
-
-        $incr = ($channels == 1) ? 'dst++' : "dst += $channels";
-        print <<EOF;
-            $incr;
-EOF
-    }
-
-    for (my $i = 0; $i < $channels; $i++) {
-        my $idx = ($upsample) ? (($channels - $i) - 1) : $i;
-        my $swapped = getSwapFunc($fsize, $fsigned, $ffloat, $fendian, "src[$idx]");
-        print <<EOF;
-            sample${idx} = ($fctype) (((($bigger) $swapped) + (($bigger) last_sample${idx})) $interp);
-EOF
-    }
-
-    for (my $i = 0; $i < $channels; $i++) {
-        my $idx = ($upsample) ? (($channels - $i) - 1) : $i;
-        print <<EOF;
-            last_sample${idx} = sample${idx};
-EOF
-    }
-
-    print <<EOF;
-            eps -= $eps_adjust;
-        }
-    }
-EOF
-
-        print <<EOF;
-    cvt->len_cvt = dstsize;
-    if (cvt->filters[++cvt->filter_index]) {
-        cvt->filters[cvt->filter_index] (cvt, format);
-    }
-}
-
-EOF
-
-}
-
-# These handle clean resamples...doubling and quadrupling the sample rate, etc.
-sub buildMultipleResampleFunc {
-    # !!! FIXME: we do a lot of unnecessary and ugly casting in here, due to getSwapFunc().
-    my ($from, $channels, $upsample, $multiple) = @_;
-    my ($fsigned, $ffloat, $fsize, $fendian, $fctype) = splittype($from);
-
-    my $bigger = getBiggerCtype($ffloat, $fsize);
-    my $interp = ($ffloat) ? '* 0.5' : '>> 1';
-    my $interp2 = ($ffloat) ? '* 0.25' : '>> 2';
-    my $mult3 = ($ffloat) ? '3.0' : '3';
-    my $lencvtop = ($upsample) ? '*' : '/';
-
-    my $resample = ($upsample) ? 'Upsample' : 'Downsample';
-    my $hashid = getResamplerHashId($from, $channels, $upsample, $multiple);
-    my $sym = "SDL_${resample}_${from}_${channels}c_x${multiple}";
-    $funcs{$hashid} = $sym;
-    $custom_converters++;
-
-    # !!! FIXME: DEBUG_CONVERT should report frequencies.
-    print <<EOF;
-static void SDLCALL
-${sym}(SDL_AudioCVT * cvt, SDL_AudioFormat format)
-{
-#if DEBUG_CONVERT
-    fprintf(stderr, "$resample (x${multiple}) AUDIO_${from}, ${channels} channels.\\n");
-#endif
-
-    const int dstsize = cvt->len_cvt $lencvtop $multiple;
-EOF
-
-    my $endcomparison = '!=';
-
-    # Upsampling (growing the buffer) needs to work backwards, since we
-    #  overwrite the buffer as we go.
-    if ($upsample) {
-        $endcomparison = '>=';  # dst > target
-        print <<EOF;
-    $fctype *dst = (($fctype *) (cvt->buf + dstsize)) - $channels * $multiple;
-    const $fctype *src = (($fctype *) (cvt->buf + cvt->len_cvt)) - $channels;
-    const $fctype *target = ((const $fctype *) cvt->buf);
-EOF
-    } else {
-        $endcomparison = '<';  # dst < target
-        print <<EOF;
-    $fctype *dst = ($fctype *) cvt->buf;
-    const $fctype *src = ($fctype *) cvt->buf;
-    const $fctype *target = (const $fctype *) (cvt->buf + dstsize);
-EOF
-    }
-
-    for (my $i = 0; $i < $channels; $i++) {
-        my $idx = ($upsample) ? (($channels - $i) - 1) : $i;
-        my $val = getSwapFunc($fsize, $fsigned, $ffloat, $fendian, "src[$idx]");
-        print <<EOF;
-    $bigger last_sample${idx} = ($bigger) $val;
-EOF
-    }
-
-    print <<EOF;
-    while (dst $endcomparison target) {
-EOF
-
-    for (my $i = 0; $i < $channels; $i++) {
-        my $idx = ($upsample) ? (($channels - $i) - 1) : $i;
-        my $val = getSwapFunc($fsize, $fsigned, $ffloat, $fendian, "src[$idx]");
-        print <<EOF;
-        const $bigger sample${idx} = ($bigger) $val;
-EOF
-    }
-
-    my $incr = '';
-    if ($upsample) {
-        $incr = ($channels == 1) ? 'src--' : "src -= $channels";
-    } else {
-        my $amount = $channels * $multiple;
-        $incr = "src += $amount";  # can't ever be 1, so no "++" version.
-    }
-
-
-    print <<EOF;
-        $incr;
-EOF
-
-    # !!! FIXME: This really begs for some Altivec or SSE, etc.
-    if ($upsample) {
-        if ($multiple == 2) {
-            for (my $i = $channels-1; $i >= 0; $i--) {
-                my $dsti = $i + $channels;
-                print <<EOF;
-        dst[$dsti] = ($fctype) ((sample${i} + last_sample${i}) $interp);
-EOF
-            }
-            for (my $i = $channels-1; $i >= 0; $i--) {
-                my $dsti = $i;
-                print <<EOF;
-        dst[$dsti] = ($fctype) sample${i};
-EOF
-            }
-        } elsif ($multiple == 4) {
-            for (my $i = $channels-1; $i >= 0; $i--) {
-                my $dsti = $i + ($channels * 3);
-                print <<EOF;
-        dst[$dsti] = ($fctype) ((sample${i} + ($mult3 * last_sample${i})) $interp2);
-EOF
-            }
-
-            for (my $i = $channels-1; $i >= 0; $i--) {
-                my $dsti = $i + ($channels * 2);
-                print <<EOF;
-        dst[$dsti] = ($fctype) ((sample${i} + last_sample${i}) $interp);
-EOF
-            }
-
-            for (my $i = $channels-1; $i >= 0; $i--) {
-                my $dsti = $i + ($channels * 1);
-                print <<EOF;
-        dst[$dsti] = ($fctype) ((($mult3 * sample${i}) + last_sample${i}) $interp2);
-EOF
-            }
-
-            for (my $i = $channels-1; $i >= 0; $i--) {
-                my $dsti = $i + ($channels * 0);
-                print <<EOF;
-        dst[$dsti] = ($fctype) sample${i};
-EOF
-            }
-        } else {
-            die('bug in program.');  # we only handle x2 and x4.
-        }
-    } else {  # downsample.
-        if ($multiple == 2) {
-            for (my $i = 0; $i < $channels; $i++) {
-                print <<EOF;
-        dst[$i] = ($fctype) ((sample${i} + last_sample${i}) $interp);
-EOF
-            }
-        } elsif ($multiple == 4) {
-            # !!! FIXME: interpolate all 4 samples?
-            for (my $i = 0; $i < $channels; $i++) {
-                print <<EOF;
-        dst[$i] = ($fctype) ((sample${i} + last_sample${i}) $interp);
-EOF
-            }
-        } else {
-            die('bug in program.');  # we only handle x2 and x4.
-        }
-    }
-
-    for (my $i = 0; $i < $channels; $i++) {
-        my $idx = ($upsample) ? (($channels - $i) - 1) : $i;
-        print <<EOF;
-        last_sample${idx} = sample${idx};
-EOF
-    }
-
-    if ($upsample) {
-        my $amount = $channels * $multiple;
-        $incr = "dst -= $amount";  # can't ever be 1, so no "--" version.
-    } else {
-        $incr = ($channels == 1) ? 'dst++' : "dst += $channels";
-    }
-
-    print <<EOF;
-        $incr;
-    }
-
-    cvt->len_cvt = dstsize;
-    if (cvt->filters[++cvt->filter_index]) {
-        cvt->filters[cvt->filter_index] (cvt, format);
-    }
-}
-
-EOF
-
-}
-
-sub buildResamplers {
-    print "#if !NO_RESAMPLERS\n\n";
-    foreach (@audiotypes) {
-        my $from = $_;
-        foreach (@channels) {
-            my $channel = $_;
-            buildArbitraryResampleFunc($from, $channel, 1);
-            buildArbitraryResampleFunc($from, $channel, 0);
-        }
-    }
-
-    print "\n#if !LESS_RESAMPLERS\n\n";
-    foreach (@audiotypes) {
-        my $from = $_;
-        foreach (@channels) {
-            my $channel = $_;
-            for (my $multiple = 2; $multiple <= 4; $multiple += 2) {
-                buildMultipleResampleFunc($from, $channel, 1, $multiple);
-                buildMultipleResampleFunc($from, $channel, 0, $multiple);
-            }
-        }
-    }
-
-    print "#endif  /* !LESS_RESAMPLERS */\n";
-    print "#endif  /* !NO_RESAMPLERS */\n\n\n";
-
-    print "const SDL_AudioRateFilters sdl_audio_rate_filters[] =\n{\n";
-    print "#if !NO_RESAMPLERS\n";
-    foreach (@audiotypes) {
-        my $from = $_;
-        foreach (@channels) {
-            my $channel = $_;
-            for (my $upsample = 0; $upsample <= 1; $upsample++) {
-                my $hashid = getResamplerHashId($from, $channel, $upsample, 0);
-                my $sym = $funcs{$hashid};
-                print("    { AUDIO_$from, $channel, $upsample, 0, $sym },\n");
-            }
-        }
-    }
-
-    print "#if !LESS_RESAMPLERS\n";
-    foreach (@audiotypes) {
-        my $from = $_;
-        foreach (@channels) {
-            my $channel = $_;
-            for (my $multiple = 2; $multiple <= 4; $multiple += 2) {
-                for (my $upsample = 0; $upsample <= 1; $upsample++) {
-                    my $hashid = getResamplerHashId($from, $channel, $upsample, $multiple);
-                    my $sym = $funcs{$hashid};
-                    print("    { AUDIO_$from, $channel, $upsample, $multiple, $sym },\n");
-                }
-            }
-        }
-    }
-
-    print "#endif  /* !LESS_RESAMPLERS */\n";
-    print "#endif  /* !NO_RESAMPLERS */\n";
-    print("    { 0, 0, 0, 0, NULL }\n");
-    print "};\n\n";
-}
-
-
-# mainline ...
-
-outputHeader();
-buildTypeConverters();
-buildResamplers();
-outputFooter();
-
-exit 0;
-
-# end of sdlgenaudiocvt.pl ...
-

Engine/lib/sdl/src/audio/sndio/SDL_sndioaudio.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -33,6 +33,7 @@
 #include <signal.h>
 #endif
 
+#include <poll.h>
 #include <unistd.h>
 
 #include "SDL_audio.h"
@@ -43,6 +44,14 @@
 #include "SDL_loadso.h"
 #endif
 
+#ifndef INFTIM
+#define INFTIM -1
+#endif
+
+#ifndef SIO_DEVANY
+#define SIO_DEVANY "default"
+#endif
+
 static struct sio_hdl * (*SNDIO_sio_open)(const char *, unsigned int, int);
 static void (*SNDIO_sio_close)(struct sio_hdl *);
 static int (*SNDIO_sio_setpar)(struct sio_hdl *, struct sio_par *);
@@ -51,6 +60,10 @@ static int (*SNDIO_sio_start)(struct sio_hdl *);
 static int (*SNDIO_sio_stop)(struct sio_hdl *);
 static size_t (*SNDIO_sio_read)(struct sio_hdl *, void *, size_t);
 static size_t (*SNDIO_sio_write)(struct sio_hdl *, const void *, size_t);
+static int (*SNDIO_sio_nfds)(struct sio_hdl *);
+static int (*SNDIO_sio_pollfd)(struct sio_hdl *, struct pollfd *, int);
+static int (*SNDIO_sio_revents)(struct sio_hdl *, struct pollfd *);
+static int (*SNDIO_sio_eof)(struct sio_hdl *);
 static void (*SNDIO_sio_initpar)(struct sio_par *);
 
 #ifdef SDL_AUDIO_DRIVER_SNDIO_DYNAMIC
@@ -87,6 +100,10 @@ load_sndio_syms(void)
     SDL_SNDIO_SYM(sio_stop);
     SDL_SNDIO_SYM(sio_read);
     SDL_SNDIO_SYM(sio_write);
+    SDL_SNDIO_SYM(sio_nfds);
+    SDL_SNDIO_SYM(sio_pollfd);
+    SDL_SNDIO_SYM(sio_revents);
+    SDL_SNDIO_SYM(sio_eof);
     SDL_SNDIO_SYM(sio_initpar);
     return 0;
 }
@@ -164,6 +181,41 @@ SNDIO_PlayDevice(_THIS)
 #endif
 }
 
+static int
+SNDIO_CaptureFromDevice(_THIS, void *buffer, int buflen)
+{
+    size_t r;
+    int revents;
+    int nfds;
+
+    /* Emulate a blocking read */
+    r = SNDIO_sio_read(this->hidden->dev, buffer, buflen);
+    while (r == 0 && !SNDIO_sio_eof(this->hidden->dev)) {
+        if ((nfds = SNDIO_sio_pollfd(this->hidden->dev, this->hidden->pfd, POLLIN)) <= 0
+            || poll(this->hidden->pfd, nfds, INFTIM) < 0) {
+            return -1;
+        }
+        revents = SNDIO_sio_revents(this->hidden->dev, this->hidden->pfd);
+        if (revents & POLLIN) {
+            r = SNDIO_sio_read(this->hidden->dev, buffer, buflen);
+        }
+        if (revents & POLLHUP) {
+            break;
+        }
+    }
+    return (int) r;
+}
+
+static void
+SNDIO_FlushCapture(_THIS)
+{
+    char buf[512];
+
+    while (SNDIO_sio_read(this->hidden->dev, buf, sizeof(buf)) != 0) {
+        /* do nothing */;
+    }
+}
+
 static Uint8 *
 SNDIO_GetDeviceBuf(_THIS)
 {
@@ -173,6 +225,9 @@ SNDIO_GetDeviceBuf(_THIS)
 static void
 SNDIO_CloseDevice(_THIS)
 {
+    if ( this->hidden->pfd != NULL ) {
+        SDL_free(this->hidden->pfd);
+    }
     if ( this->hidden->dev != NULL ) {
         SNDIO_sio_stop(this->hidden->dev);
         SNDIO_sio_close(this->hidden->dev);
@@ -197,11 +252,19 @@ SNDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
 
     this->hidden->mixlen = this->spec.size;
 
-    /* !!! FIXME: SIO_DEVANY can be a specific device... */
-    if ((this->hidden->dev = SNDIO_sio_open(SIO_DEVANY, SIO_PLAY, 0)) == NULL) {
+    /* Capture devices must be non-blocking for SNDIO_FlushCapture */
+    if ((this->hidden->dev =
+        SNDIO_sio_open(devname != NULL ? devname : SIO_DEVANY,
+                       iscapture ? SIO_REC : SIO_PLAY, iscapture)) == NULL) {
         return SDL_SetError("sio_open() failed");
     }
 
+    /* Allocate the pollfd array for capture devices */
+    if (iscapture && (this->hidden->pfd =
+        SDL_malloc(sizeof(struct pollfd) * SNDIO_sio_nfds(this->hidden->dev))) == NULL) {
+        return SDL_OutOfMemory();
+    }
+
     SNDIO_sio_initpar(&par);
 
     par.rate = this->spec.freq;
@@ -300,8 +363,12 @@ SNDIO_Init(SDL_AudioDriverImpl * impl)
     impl->PlayDevice = SNDIO_PlayDevice;
     impl->GetDeviceBuf = SNDIO_GetDeviceBuf;
     impl->CloseDevice = SNDIO_CloseDevice;
+    impl->CaptureFromDevice = SNDIO_CaptureFromDevice;
+    impl->FlushCapture = SNDIO_FlushCapture;
     impl->Deinitialize = SNDIO_Deinitialize;
-    impl->OnlyHasDefaultOutputDevice = 1;  /* !!! FIXME: sndio can handle multiple devices. */
+
+    impl->AllowsArbitraryDeviceNames = 1;
+    impl->HasCaptureSupport = SDL_TRUE;
 
     return 1;   /* this audio target is available. */
 }

Engine/lib/sdl/src/audio/sndio/SDL_sndioaudio.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -20,9 +20,10 @@
 */
 #include "../../SDL_internal.h"
 
-#ifndef _SDL_sndioaudio_h
-#define _SDL_sndioaudio_h
+#ifndef SDL_sndioaudio_h_
+#define SDL_sndioaudio_h_
 
+#include <poll.h>
 #include <sndio.h>
 
 #include "../SDL_sysaudio.h"
@@ -38,8 +39,11 @@ struct SDL_PrivateAudioData
     /* Raw mixing buffer */
     Uint8 *mixbuf;
     int mixlen;
+
+    /* Polling structures for non-blocking sndio devices */
+    struct pollfd *pfd;
 };
 
-#endif /* _SDL_sndioaudio_h */
+#endif /* SDL_sndioaudio_h_ */
 
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/sun/SDL_sunaudio.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -40,6 +40,7 @@
 
 #include "SDL_timer.h"
 #include "SDL_audio.h"
+#include "../../core/unix/SDL_poll.h"
 #include "../SDL_audio_c.h"
 #include "../SDL_audiodev_c.h"
 #include "SDL_sunaudio.h"
@@ -97,11 +98,7 @@ SUNAUDIO_WaitDevice(_THIS)
         }
     }
 #else
-    fd_set fdset;
-
-    FD_ZERO(&fdset);
-    FD_SET(this->hidden->audio_fd, &fdset);
-    select(this->hidden->audio_fd + 1, NULL, &fdset, NULL, NULL);
+    SDL_IOReady(this->hidden->audio_fd, SDL_TRUE, -1);
 #endif
 }
 
@@ -193,6 +190,10 @@ SUNAUDIO_CloseDevice(_THIS)
 static int
 SUNAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
 {
+#ifdef AUDIO_SETINFO
+    int enc;
+#endif
+    int desired_freq = 0;
     const int flags = ((iscapture) ? OPEN_FLAGS_INPUT : OPEN_FLAGS_OUTPUT);
     SDL_AudioFormat format = 0;
     audio_info_t info;
@@ -220,10 +221,7 @@ SUNAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
         return SDL_SetError("Couldn't open %s: %s", devname, strerror(errno));
     }
 
-#ifdef AUDIO_SETINFO
-    int enc;
-#endif
-    int desired_freq = this->spec.freq;
+    desired_freq = this->spec.freq;
 
     /* Determine the audio parameters from the AudioSpec */
     switch (SDL_AUDIO_BITSIZE(this->spec.format)) {

Engine/lib/sdl/src/audio/sun/SDL_sunaudio.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -20,8 +20,8 @@
 */
 #include "../../SDL_internal.h"
 
-#ifndef _SDL_sunaudio_h
-#define _SDL_sunaudio_h
+#ifndef SDL_sunaudio_h_
+#define SDL_sunaudio_h_
 
 #include "../SDL_sysaudio.h"
 
@@ -42,6 +42,6 @@ struct SDL_PrivateAudioData
     int frequency;              /* The audio frequency in KHz */
 };
 
-#endif /* _SDL_sunaudio_h */
+#endif /* SDL_sunaudio_h_ */
 
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/wasapi/SDL_wasapi.c

@@ -0,0 +1,779 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "../../SDL_internal.h"
+
+#if SDL_AUDIO_DRIVER_WASAPI
+
+#include "../../core/windows/SDL_windows.h"
+#include "SDL_audio.h"
+#include "SDL_timer.h"
+#include "../SDL_audio_c.h"
+#include "../SDL_sysaudio.h"
+#include "SDL_assert.h"
+#include "SDL_log.h"
+
+#define COBJMACROS
+#include <mmdeviceapi.h>
+#include <audioclient.h>
+
+#include "SDL_wasapi.h"
+
+/* This constant isn't available on MinGW-w64 */
+#ifndef AUDCLNT_STREAMFLAGS_RATEADJUST
+#define AUDCLNT_STREAMFLAGS_RATEADJUST  0x00100000
+#endif
+
+/* these increment as default devices change. Opened default devices pick up changes in their threads. */
+SDL_atomic_t WASAPI_DefaultPlaybackGeneration;
+SDL_atomic_t WASAPI_DefaultCaptureGeneration;
+
+/* This is a list of device id strings we have inflight, so we have consistent pointers to the same device. */
+typedef struct DevIdList
+{
+    WCHAR *str;
+    struct DevIdList *next;
+} DevIdList;
+
+static DevIdList *deviceid_list = NULL;
+
+/* Some GUIDs we need to know without linking to libraries that aren't available before Vista. */
+static const IID SDL_IID_IAudioRenderClient = { 0xf294acfc, 0x3146, 0x4483,{ 0xa7, 0xbf, 0xad, 0xdc, 0xa7, 0xc2, 0x60, 0xe2 } };
+static const IID SDL_IID_IAudioCaptureClient = { 0xc8adbd64, 0xe71e, 0x48a0,{ 0xa4, 0xde, 0x18, 0x5c, 0x39, 0x5c, 0xd3, 0x17 } };
+static const GUID SDL_KSDATAFORMAT_SUBTYPE_PCM = { 0x00000001, 0x0000, 0x0010,{ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 } };
+static const GUID SDL_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT = { 0x00000003, 0x0000, 0x0010,{ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 } };
+
+static SDL_bool
+WStrEqual(const WCHAR *a, const WCHAR *b)
+{
+    while (*a) {
+        if (*a != *b) {
+            return SDL_FALSE;
+        }
+        a++;
+        b++;
+    }
+    return *b == 0;
+}
+
+static size_t
+WStrLen(const WCHAR *wstr)
+{
+    size_t retval = 0;
+    if (wstr) {
+        while (*(wstr++)) {
+            retval++;
+        }
+    }
+    return retval;
+}
+
+static WCHAR *
+WStrDupe(const WCHAR *wstr)
+{
+    const size_t len = (WStrLen(wstr) + 1) * sizeof (WCHAR);
+    WCHAR *retval = (WCHAR *) SDL_malloc(len);
+    if (retval) {
+        SDL_memcpy(retval, wstr, len);
+    }
+    return retval;
+}
+
+
+void
+WASAPI_RemoveDevice(const SDL_bool iscapture, LPCWSTR devid)
+{
+    DevIdList *i;
+    DevIdList *next;
+    DevIdList *prev = NULL;
+    for (i = deviceid_list; i; i = next) {
+        next = i->next;
+        if (WStrEqual(i->str, devid)) {
+            if (prev) {
+                prev->next = next;
+            } else {
+                deviceid_list = next;
+            }
+            SDL_RemoveAudioDevice(iscapture, i->str);
+            SDL_free(i->str);
+            SDL_free(i);
+        }
+        prev = i;
+    }
+}
+
+void
+WASAPI_AddDevice(const SDL_bool iscapture, const char *devname, LPCWSTR devid)
+{
+    DevIdList *devidlist;
+
+    /* You can have multiple endpoints on a device that are mutually exclusive ("Speakers" vs "Line Out" or whatever).
+       In a perfect world, things that are unplugged won't be in this collection. The only gotcha is probably for
+       phones and tablets, where you might have an internal speaker and a headphone jack and expect both to be
+       available and switch automatically. (!!! FIXME...?) */
+
+    /* see if we already have this one. */
+    for (devidlist = deviceid_list; devidlist; devidlist = devidlist->next) {
+        if (WStrEqual(devidlist->str, devid)) {
+            return;  /* we already have this. */
+        }
+    }
+
+    devidlist = (DevIdList *) SDL_malloc(sizeof (*devidlist));
+    if (!devidlist) {
+        return;  /* oh well. */
+    }
+
+    devid = WStrDupe(devid);
+    if (!devid) {
+        SDL_free(devidlist);
+        return;  /* oh well. */
+    }
+
+    devidlist->str = (WCHAR *) devid;
+    devidlist->next = deviceid_list;
+    deviceid_list = devidlist;
+
+    SDL_AddAudioDevice(iscapture, devname, (void *) devid);
+}
+
+static void
+WASAPI_DetectDevices(void)
+{
+    WASAPI_EnumerateEndpoints();
+}
+
+static int
+WASAPI_GetPendingBytes(_THIS)
+{
+    UINT32 frames = 0;
+
+    /* it's okay to fail here; we'll deal with failures in the audio thread. */
+    /* FIXME: need a lock around checking this->hidden->client */
+    if (this->hidden->client != NULL) {  /* definitely activated? */
+        if (FAILED(IAudioClient_GetCurrentPadding(this->hidden->client, &frames))) {
+            return 0;  /* oh well. */
+        }
+    }
+    return ((int) frames) * this->hidden->framesize;
+}
+
+static SDL_INLINE SDL_bool
+WasapiFailed(_THIS, const HRESULT err)
+{
+    if (err == S_OK) {
+        return SDL_FALSE;
+    }
+
+    if (err == AUDCLNT_E_DEVICE_INVALIDATED) {
+        this->hidden->device_lost = SDL_TRUE;
+    } else if (SDL_AtomicGet(&this->enabled)) {
+        IAudioClient_Stop(this->hidden->client);
+        SDL_OpenedAudioDeviceDisconnected(this);
+        SDL_assert(!SDL_AtomicGet(&this->enabled));
+    }
+
+    return SDL_TRUE;
+}
+
+static int
+UpdateAudioStream(_THIS, const SDL_AudioSpec *oldspec)
+{
+    /* Since WASAPI requires us to handle all audio conversion, and our
+       device format might have changed, we might have to add/remove/change
+       the audio stream that the higher level uses to convert data, so
+       SDL keeps firing the callback as if nothing happened here. */
+
+    if ( (this->callbackspec.channels == this->spec.channels) &&
+         (this->callbackspec.format == this->spec.format) &&
+         (this->callbackspec.freq == this->spec.freq) &&
+         (this->callbackspec.samples == this->spec.samples) ) {
+        /* no need to buffer/convert in an AudioStream! */
+        SDL_FreeAudioStream(this->stream);
+        this->stream = NULL;
+    } else if ( (oldspec->channels == this->spec.channels) &&
+         (oldspec->format == this->spec.format) &&
+         (oldspec->freq == this->spec.freq) ) {
+        /* The existing audio stream is okay to keep using. */
+    } else {
+        /* replace the audiostream for new format */
+        SDL_FreeAudioStream(this->stream);
+        if (this->iscapture) {
+            this->stream = SDL_NewAudioStream(this->spec.format,
+                                this->spec.channels, this->spec.freq,
+                                this->callbackspec.format,
+                                this->callbackspec.channels,
+                                this->callbackspec.freq);
+        } else {
+            this->stream = SDL_NewAudioStream(this->callbackspec.format,
+                                this->callbackspec.channels,
+                                this->callbackspec.freq, this->spec.format,
+                                this->spec.channels, this->spec.freq);
+        }
+
+        if (!this->stream) {
+            return -1;
+        }
+    }
+
+    /* make sure our scratch buffer can cover the new device spec. */
+    if (this->spec.size > this->work_buffer_len) {
+        Uint8 *ptr = (Uint8 *) SDL_realloc(this->work_buffer, this->spec.size);
+        if (ptr == NULL) {
+            return SDL_OutOfMemory();
+        }
+        this->work_buffer = ptr;
+        this->work_buffer_len = this->spec.size;
+    }
+
+    return 0;
+}
+
+
+static void ReleaseWasapiDevice(_THIS);
+
+static SDL_bool
+RecoverWasapiDevice(_THIS)
+{
+    ReleaseWasapiDevice(this);  /* dump the lost device's handles. */
+
+    if (this->hidden->default_device_generation) {
+        this->hidden->default_device_generation = SDL_AtomicGet(this->iscapture ?  &WASAPI_DefaultCaptureGeneration : &WASAPI_DefaultPlaybackGeneration);
+    }
+
+    /* this can fail for lots of reasons, but the most likely is we had a
+       non-default device that was disconnected, so we can't recover. Default
+       devices try to reinitialize whatever the new default is, so it's more
+       likely to carry on here, but this handles a non-default device that
+       simply had its format changed in the Windows Control Panel. */
+    if (WASAPI_ActivateDevice(this, SDL_TRUE) == -1) {
+        SDL_OpenedAudioDeviceDisconnected(this);
+        return SDL_FALSE;
+    }
+
+    this->hidden->device_lost = SDL_FALSE;
+
+    return SDL_TRUE;  /* okay, carry on with new device details! */
+}
+
+static SDL_bool
+RecoverWasapiIfLost(_THIS)
+{
+    const int generation = this->hidden->default_device_generation;
+    SDL_bool lost = this->hidden->device_lost;
+
+    if (!SDL_AtomicGet(&this->enabled)) {
+        return SDL_FALSE;  /* already failed. */
+    }
+
+    if (!this->hidden->client) {
+        return SDL_TRUE;  /* still waiting for activation. */
+    }
+
+    if (!lost && (generation > 0)) { /* is a default device? */
+        const int newgen = SDL_AtomicGet(this->iscapture ? &WASAPI_DefaultCaptureGeneration : &WASAPI_DefaultPlaybackGeneration);
+        if (generation != newgen) {  /* the desired default device was changed, jump over to it. */
+            lost = SDL_TRUE;
+        }
+    }
+
+    return lost ? RecoverWasapiDevice(this) : SDL_TRUE;
+}
+
+static Uint8 *
+WASAPI_GetDeviceBuf(_THIS)
+{
+    /* get an endpoint buffer from WASAPI. */
+    BYTE *buffer = NULL;
+
+    while (RecoverWasapiIfLost(this) && this->hidden->render) {
+        if (!WasapiFailed(this, IAudioRenderClient_GetBuffer(this->hidden->render, this->spec.samples, &buffer))) {
+            return (Uint8 *) buffer;
+        }
+        SDL_assert(buffer == NULL);
+    }
+
+    return (Uint8 *) buffer;
+}
+
+static void
+WASAPI_PlayDevice(_THIS)
+{
+    if (this->hidden->render != NULL) {  /* definitely activated? */
+        /* WasapiFailed() will mark the device for reacquisition or removal elsewhere. */
+        WasapiFailed(this, IAudioRenderClient_ReleaseBuffer(this->hidden->render, this->spec.samples, 0));
+    }
+}
+
+static void
+WASAPI_WaitDevice(_THIS)
+{
+    while (RecoverWasapiIfLost(this) && this->hidden->client && this->hidden->event) {
+        /*SDL_Log("WAITDEVICE");*/
+        if (WaitForSingleObjectEx(this->hidden->event, INFINITE, FALSE) == WAIT_OBJECT_0) {
+            const UINT32 maxpadding = this->spec.samples;
+            UINT32 padding = 0;
+            if (!WasapiFailed(this, IAudioClient_GetCurrentPadding(this->hidden->client, &padding))) {
+                /*SDL_Log("WASAPI EVENT! padding=%u maxpadding=%u", (unsigned int)padding, (unsigned int)maxpadding);*/
+                if (padding <= maxpadding) {
+                    break;
+                }
+            }
+        } else {
+            /*SDL_Log("WASAPI FAILED EVENT!");*/
+            IAudioClient_Stop(this->hidden->client);
+            SDL_OpenedAudioDeviceDisconnected(this);
+        }
+    }
+}
+
+static int
+WASAPI_CaptureFromDevice(_THIS, void *buffer, int buflen)
+{
+    SDL_AudioStream *stream = this->hidden->capturestream;
+    const int avail = SDL_AudioStreamAvailable(stream);
+    if (avail > 0) {
+        const int cpy = SDL_min(buflen, avail);
+        SDL_AudioStreamGet(stream, buffer, cpy);
+        return cpy;
+    }
+
+    while (RecoverWasapiIfLost(this)) {
+        HRESULT ret;
+        BYTE *ptr = NULL;
+        UINT32 frames = 0;
+        DWORD flags = 0;
+
+        /* uhoh, client isn't activated yet, just return silence. */
+        if (!this->hidden->capture) {
+            /* Delay so we run at about the speed that audio would be arriving. */
+            SDL_Delay(((this->spec.samples * 1000) / this->spec.freq));
+            SDL_memset(buffer, this->spec.silence, buflen);
+            return buflen;
+        }
+
+        ret = IAudioCaptureClient_GetBuffer(this->hidden->capture, &ptr, &frames, &flags, NULL, NULL);
+        if (ret != AUDCLNT_S_BUFFER_EMPTY) {
+            WasapiFailed(this, ret); /* mark device lost/failed if necessary. */
+        }
+
+        if ((ret == AUDCLNT_S_BUFFER_EMPTY) || !frames) {
+            WASAPI_WaitDevice(this);
+        } else if (ret == S_OK) {
+            const int total = ((int) frames) * this->hidden->framesize;
+            const int cpy = SDL_min(buflen, total);
+            const int leftover = total - cpy;
+            const SDL_bool silent = (flags & AUDCLNT_BUFFERFLAGS_SILENT) ? SDL_TRUE : SDL_FALSE;
+
+            if (silent) {
+                SDL_memset(buffer, this->spec.silence, cpy);
+            } else {
+                SDL_memcpy(buffer, ptr, cpy);
+            }
+            
+            if (leftover > 0) {
+                ptr += cpy;
+                if (silent) {
+                    SDL_memset(ptr, this->spec.silence, leftover);  /* I guess this is safe? */
+                }
+
+                if (SDL_AudioStreamPut(stream, ptr, leftover) == -1) {
+                    return -1;  /* uhoh, out of memory, etc. Kill device.  :( */
+                }
+            }
+
+            ret = IAudioCaptureClient_ReleaseBuffer(this->hidden->capture, frames);
+            WasapiFailed(this, ret); /* mark device lost/failed if necessary. */
+
+            return cpy;
+        }
+    }
+
+    return -1;  /* unrecoverable error. */
+}
+
+static void
+WASAPI_FlushCapture(_THIS)
+{
+    BYTE *ptr = NULL;
+    UINT32 frames = 0;
+    DWORD flags = 0;
+
+    if (!this->hidden->capture) {
+        return;  /* not activated yet? */
+    }
+
+    /* just read until we stop getting packets, throwing them away. */
+    while (SDL_TRUE) {
+        const HRESULT ret = IAudioCaptureClient_GetBuffer(this->hidden->capture, &ptr, &frames, &flags, NULL, NULL);
+        if (ret == AUDCLNT_S_BUFFER_EMPTY) {
+            break;  /* no more buffered data; we're done. */
+        } else if (WasapiFailed(this, ret)) {
+            break;  /* failed for some other reason, abort. */
+        } else if (WasapiFailed(this, IAudioCaptureClient_ReleaseBuffer(this->hidden->capture, frames))) {
+            break;  /* something broke. */
+        }
+    }
+    SDL_AudioStreamClear(this->hidden->capturestream);
+}
+
+static void
+ReleaseWasapiDevice(_THIS)
+{
+    if (this->hidden->client) {
+        IAudioClient_Stop(this->hidden->client);
+        IAudioClient_SetEventHandle(this->hidden->client, NULL);
+        IAudioClient_Release(this->hidden->client);
+        this->hidden->client = NULL;
+    }
+
+    if (this->hidden->render) {
+        IAudioRenderClient_Release(this->hidden->render);
+        this->hidden->render = NULL;
+    }
+
+    if (this->hidden->capture) {
+        IAudioCaptureClient_Release(this->hidden->capture);
+        this->hidden->capture = NULL;
+    }
+
+    if (this->hidden->waveformat) {
+        CoTaskMemFree(this->hidden->waveformat);
+        this->hidden->waveformat = NULL;
+    }
+
+    if (this->hidden->capturestream) {
+        SDL_FreeAudioStream(this->hidden->capturestream);
+        this->hidden->capturestream = NULL;
+    }
+
+    if (this->hidden->activation_handler) {
+        WASAPI_PlatformDeleteActivationHandler(this->hidden->activation_handler);
+        this->hidden->activation_handler = NULL;
+    }
+
+    if (this->hidden->event) {
+        CloseHandle(this->hidden->event);
+        this->hidden->event = NULL;
+    }
+}
+
+static void
+WASAPI_CloseDevice(_THIS)
+{
+    WASAPI_UnrefDevice(this);
+}
+
+void
+WASAPI_RefDevice(_THIS)
+{
+    SDL_AtomicIncRef(&this->hidden->refcount);
+}
+
+void
+WASAPI_UnrefDevice(_THIS)
+{
+    if (!SDL_AtomicDecRef(&this->hidden->refcount)) {
+        return;
+    }
+
+    /* actual closing happens here. */
+
+    /* don't touch this->hidden->task in here; it has to be reverted from
+       our callback thread. We do that in WASAPI_ThreadDeinit().
+       (likewise for this->hidden->coinitialized). */
+    ReleaseWasapiDevice(this);
+    SDL_free(this->hidden->devid);
+    SDL_free(this->hidden);
+}
+
+/* This is called once a device is activated, possibly asynchronously. */
+int
+WASAPI_PrepDevice(_THIS, const SDL_bool updatestream)
+{
+    /* !!! FIXME: we could request an exclusive mode stream, which is lower latency;
+       !!!  it will write into the kernel's audio buffer directly instead of
+       !!!  shared memory that a user-mode mixer then writes to the kernel with
+       !!!  everything else. Doing this means any other sound using this device will
+       !!!  stop playing, including the user's MP3 player and system notification
+       !!!  sounds. You'd probably need to release the device when the app isn't in
+       !!!  the foreground, to be a good citizen of the system. It's doable, but it's
+       !!!  more work and causes some annoyances, and I don't know what the latency
+       !!!  wins actually look like. Maybe add a hint to force exclusive mode at
+       !!!  some point. To be sure, defaulting to shared mode is the right thing to
+       !!!  do in any case. */
+    const SDL_AudioSpec oldspec = this->spec;
+    const AUDCLNT_SHAREMODE sharemode = AUDCLNT_SHAREMODE_SHARED;
+    UINT32 bufsize = 0;  /* this is in sample frames, not samples, not bytes. */
+    REFERENCE_TIME duration = 0;
+    IAudioClient *client = this->hidden->client;
+    IAudioRenderClient *render = NULL;
+    IAudioCaptureClient *capture = NULL;
+    WAVEFORMATEX *waveformat = NULL;
+    SDL_AudioFormat test_format = SDL_FirstAudioFormat(this->spec.format);
+    SDL_AudioFormat wasapi_format = 0;
+    SDL_bool valid_format = SDL_FALSE;
+    HRESULT ret = S_OK;
+    DWORD streamflags = 0;
+
+    SDL_assert(client != NULL);
+
+#ifdef __WINRT__  /* CreateEventEx() arrived in Vista, so we need an #ifdef for XP. */
+    this->hidden->event = CreateEventEx(NULL, NULL, 0, EVENT_ALL_ACCESS);
+#else
+    this->hidden->event = CreateEventW(NULL, 0, 0, NULL);
+#endif
+
+    if (this->hidden->event == NULL) {
+        return WIN_SetError("WASAPI can't create an event handle");
+    }
+
+    ret = IAudioClient_GetMixFormat(client, &waveformat);
+    if (FAILED(ret)) {
+        return WIN_SetErrorFromHRESULT("WASAPI can't determine mix format", ret);
+    }
+
+    SDL_assert(waveformat != NULL);
+    this->hidden->waveformat = waveformat;
+
+    this->spec.channels = (Uint8) waveformat->nChannels;
+
+    /* Make sure we have a valid format that we can convert to whatever WASAPI wants. */
+    if ((waveformat->wFormatTag == WAVE_FORMAT_IEEE_FLOAT) && (waveformat->wBitsPerSample == 32)) {
+        wasapi_format = AUDIO_F32SYS;
+    } else if ((waveformat->wFormatTag == WAVE_FORMAT_PCM) && (waveformat->wBitsPerSample == 16)) {
+        wasapi_format = AUDIO_S16SYS;
+    } else if ((waveformat->wFormatTag == WAVE_FORMAT_PCM) && (waveformat->wBitsPerSample == 32)) {
+        wasapi_format = AUDIO_S32SYS;
+    } else if (waveformat->wFormatTag == WAVE_FORMAT_EXTENSIBLE) {
+        const WAVEFORMATEXTENSIBLE *ext = (const WAVEFORMATEXTENSIBLE *) waveformat;
+        if ((SDL_memcmp(&ext->SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, sizeof (GUID)) == 0) && (waveformat->wBitsPerSample == 32)) {
+            wasapi_format = AUDIO_F32SYS;
+        } else if ((SDL_memcmp(&ext->SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_PCM, sizeof (GUID)) == 0) && (waveformat->wBitsPerSample == 16)) {
+            wasapi_format = AUDIO_S16SYS;
+        } else if ((SDL_memcmp(&ext->SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_PCM, sizeof (GUID)) == 0) && (waveformat->wBitsPerSample == 32)) {
+            wasapi_format = AUDIO_S32SYS;
+        }
+    }
+
+    while ((!valid_format) && (test_format)) {
+        if (test_format == wasapi_format) {
+            this->spec.format = test_format;
+            valid_format = SDL_TRUE;
+            break;
+        }
+        test_format = SDL_NextAudioFormat();
+    }
+
+    if (!valid_format) {
+        return SDL_SetError("WASAPI: Unsupported audio format");
+    }
+
+    ret = IAudioClient_GetDevicePeriod(client, NULL, &duration);
+    if (FAILED(ret)) {
+        return WIN_SetErrorFromHRESULT("WASAPI can't determine minimum device period", ret);
+    }
+
+    /* favor WASAPI's resampler over our own, in Win7+. */
+    if (this->spec.freq != waveformat->nSamplesPerSec) {
+        /* RATEADJUST only works with output devices in share mode, and is available in Win7 and later.*/
+        if (WIN_IsWindows7OrGreater() && !this->iscapture && (sharemode == AUDCLNT_SHAREMODE_SHARED)) {
+            streamflags |= AUDCLNT_STREAMFLAGS_RATEADJUST;
+            waveformat->nSamplesPerSec = this->spec.freq;
+            waveformat->nAvgBytesPerSec = waveformat->nSamplesPerSec * waveformat->nChannels * (waveformat->wBitsPerSample / 8);
+        }
+        else {
+            this->spec.freq = waveformat->nSamplesPerSec;  /* force sampling rate so our resampler kicks in. */
+        }
+    }
+
+    streamflags |= AUDCLNT_STREAMFLAGS_EVENTCALLBACK;
+    ret = IAudioClient_Initialize(client, sharemode, streamflags, duration, sharemode == AUDCLNT_SHAREMODE_SHARED ? 0 : duration, waveformat, NULL);
+    if (FAILED(ret)) {
+        return WIN_SetErrorFromHRESULT("WASAPI can't initialize audio client", ret);
+    }
+
+    ret = IAudioClient_SetEventHandle(client, this->hidden->event);
+    if (FAILED(ret)) {
+        return WIN_SetErrorFromHRESULT("WASAPI can't set event handle", ret);
+    }
+
+    ret = IAudioClient_GetBufferSize(client, &bufsize);
+    if (FAILED(ret)) {
+        return WIN_SetErrorFromHRESULT("WASAPI can't determine buffer size", ret);
+    }
+
+    this->spec.samples = (Uint16) bufsize;
+    if (!this->iscapture) {
+        this->spec.samples /= 2;  /* fill half of the DMA buffer on each run. */
+    }
+
+    /* Update the fragment size as size in bytes */
+    SDL_CalculateAudioSpec(&this->spec);
+
+    this->hidden->framesize = (SDL_AUDIO_BITSIZE(this->spec.format) / 8) * this->spec.channels;
+
+    if (this->iscapture) {
+        this->hidden->capturestream = SDL_NewAudioStream(this->spec.format, this->spec.channels, this->spec.freq, this->spec.format, this->spec.channels, this->spec.freq);
+        if (!this->hidden->capturestream) {
+            return -1;  /* already set SDL_Error */
+        }
+
+        ret = IAudioClient_GetService(client, &SDL_IID_IAudioCaptureClient, (void**) &capture);
+        if (FAILED(ret)) {
+            return WIN_SetErrorFromHRESULT("WASAPI can't get capture client service", ret);
+        }
+
+        SDL_assert(capture != NULL);
+        this->hidden->capture = capture;
+        ret = IAudioClient_Start(client);
+        if (FAILED(ret)) {
+            return WIN_SetErrorFromHRESULT("WASAPI can't start capture", ret);
+        }
+
+        WASAPI_FlushCapture(this);  /* MSDN says you should flush capture endpoint right after startup. */
+    } else {
+        ret = IAudioClient_GetService(client, &SDL_IID_IAudioRenderClient, (void**) &render);
+        if (FAILED(ret)) {
+            return WIN_SetErrorFromHRESULT("WASAPI can't get render client service", ret);
+        }
+
+        SDL_assert(render != NULL);
+        this->hidden->render = render;
+        ret = IAudioClient_Start(client);
+        if (FAILED(ret)) {
+            return WIN_SetErrorFromHRESULT("WASAPI can't start playback", ret);
+        }
+    }
+
+    if (updatestream) {
+        if (UpdateAudioStream(this, &oldspec) == -1) {
+            return -1;
+        }
+    }
+
+    return 0;  /* good to go. */
+}
+
+
+static int
+WASAPI_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
+{
+    LPCWSTR devid = (LPCWSTR) handle;
+
+    /* Initialize all variables that we clean on shutdown */
+    this->hidden = (struct SDL_PrivateAudioData *)
+        SDL_malloc((sizeof *this->hidden));
+    if (this->hidden == NULL) {
+        return SDL_OutOfMemory();
+    }
+    SDL_zerop(this->hidden);
+
+    WASAPI_RefDevice(this);   /* so CloseDevice() will unref to zero. */
+
+    if (!devid) {  /* is default device? */
+        this->hidden->default_device_generation = SDL_AtomicGet(iscapture ? &WASAPI_DefaultCaptureGeneration : &WASAPI_DefaultPlaybackGeneration);
+    } else {
+        this->hidden->devid = WStrDupe(devid);
+        if (!this->hidden->devid) {
+            return SDL_OutOfMemory();
+        }
+    }
+
+    if (WASAPI_ActivateDevice(this, SDL_FALSE) == -1) {
+        return -1;  /* already set error. */
+    }
+
+    /* Ready, but waiting for async device activation.
+       Until activation is successful, we will report silence from capture
+       devices and ignore data on playback devices.
+       Also, since we don't know the _actual_ device format until after
+       activation, we let the app have whatever it asks for. We set up
+       an SDL_AudioStream to convert, if necessary, once the activation
+       completes. */
+
+    return 0;
+}
+
+static void
+WASAPI_ThreadInit(_THIS)
+{
+    WASAPI_PlatformThreadInit(this);
+}
+
+static void
+WASAPI_ThreadDeinit(_THIS)
+{
+    WASAPI_PlatformThreadDeinit(this);
+}
+
+static void
+WASAPI_Deinitialize(void)
+{
+    DevIdList *devidlist;
+    DevIdList *next;
+
+    WASAPI_PlatformDeinit();
+
+    for (devidlist = deviceid_list; devidlist; devidlist = next) {
+        next = devidlist->next;
+        SDL_free(devidlist->str);
+        SDL_free(devidlist);
+    }
+    deviceid_list = NULL;
+}
+
+static int
+WASAPI_Init(SDL_AudioDriverImpl * impl)
+{
+    SDL_AtomicSet(&WASAPI_DefaultPlaybackGeneration, 1);
+    SDL_AtomicSet(&WASAPI_DefaultCaptureGeneration, 1);
+
+    if (WASAPI_PlatformInit() == -1) {
+        return 0;
+    }
+
+    /* Set the function pointers */
+    impl->DetectDevices = WASAPI_DetectDevices;
+    impl->ThreadInit = WASAPI_ThreadInit;
+    impl->ThreadDeinit = WASAPI_ThreadDeinit;
+    impl->BeginLoopIteration = WASAPI_BeginLoopIteration;
+    impl->OpenDevice = WASAPI_OpenDevice;
+    impl->PlayDevice = WASAPI_PlayDevice;
+    impl->WaitDevice = WASAPI_WaitDevice;
+    impl->GetPendingBytes = WASAPI_GetPendingBytes;
+    impl->GetDeviceBuf = WASAPI_GetDeviceBuf;
+    impl->CaptureFromDevice = WASAPI_CaptureFromDevice;
+    impl->FlushCapture = WASAPI_FlushCapture;
+    impl->CloseDevice = WASAPI_CloseDevice;
+    impl->Deinitialize = WASAPI_Deinitialize;
+    impl->HasCaptureSupport = 1;
+
+    return 1;   /* this audio target is available. */
+}
+
+AudioBootStrap WASAPI_bootstrap = {
+    "wasapi", "WASAPI", WASAPI_Init, 0
+};
+
+#endif  /* SDL_AUDIO_DRIVER_WASAPI */
+
+/* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/wasapi/SDL_wasapi.h

@@ -0,0 +1,85 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "../../SDL_internal.h"
+
+#ifndef SDL_wasapi_h_
+#define SDL_wasapi_h_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "../SDL_sysaudio.h"
+
+/* Hidden "this" pointer for the audio functions */
+#ifdef __cplusplus
+#define _THIS SDL_AudioDevice *_this
+#else
+#define _THIS SDL_AudioDevice *this
+#endif
+
+struct SDL_PrivateAudioData
+{
+    SDL_atomic_t refcount;
+    WCHAR *devid;
+    WAVEFORMATEX *waveformat;
+    IAudioClient *client;
+    IAudioRenderClient *render;
+    IAudioCaptureClient *capture;
+    SDL_AudioStream *capturestream;
+    HANDLE event;
+    HANDLE task;
+    SDL_bool coinitialized;
+    int framesize;
+    int default_device_generation;
+    SDL_bool device_lost;
+    void *activation_handler;
+    SDL_atomic_t just_activated;
+};
+
+/* these increment as default devices change. Opened default devices pick up changes in their threads. */
+extern SDL_atomic_t WASAPI_DefaultPlaybackGeneration;
+extern SDL_atomic_t WASAPI_DefaultCaptureGeneration;
+
+/* win32 and winrt implementations call into these. */
+int WASAPI_PrepDevice(_THIS, const SDL_bool updatestream);
+void WASAPI_RefDevice(_THIS);
+void WASAPI_UnrefDevice(_THIS);
+void WASAPI_AddDevice(const SDL_bool iscapture, const char *devname, LPCWSTR devid);
+void WASAPI_RemoveDevice(const SDL_bool iscapture, LPCWSTR devid);
+
+/* These are functions that are implemented differently for Windows vs WinRT. */
+int WASAPI_PlatformInit(void);
+void WASAPI_PlatformDeinit(void);
+void WASAPI_EnumerateEndpoints(void);
+int WASAPI_ActivateDevice(_THIS, const SDL_bool isrecovery);
+void WASAPI_PlatformThreadInit(_THIS);
+void WASAPI_PlatformThreadDeinit(_THIS);
+void WASAPI_PlatformDeleteActivationHandler(void *handler);
+void WASAPI_BeginLoopIteration(_THIS);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* SDL_wasapi_h_ */
+
+/* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/wasapi/SDL_wasapi_win32.c

@@ -0,0 +1,417 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "../../SDL_internal.h"
+
+/* This is code that Windows uses to talk to WASAPI-related system APIs.
+   This is for non-WinRT desktop apps. The C++/CX implementation of these
+   functions, exclusive to WinRT, are in SDL_wasapi_winrt.cpp.
+   The code in SDL_wasapi.c is used by both standard Windows and WinRT builds
+   to deal with audio and calls into these functions. */
+
+#if SDL_AUDIO_DRIVER_WASAPI && !defined(__WINRT__)
+
+#include "../../core/windows/SDL_windows.h"
+#include "SDL_audio.h"
+#include "SDL_timer.h"
+#include "../SDL_audio_c.h"
+#include "../SDL_sysaudio.h"
+#include "SDL_assert.h"
+#include "SDL_log.h"
+
+#define COBJMACROS
+#include <mmdeviceapi.h>
+#include <audioclient.h>
+
+#include "SDL_wasapi.h"
+
+static const ERole SDL_WASAPI_role = eConsole;  /* !!! FIXME: should this be eMultimedia? Should be a hint? */
+
+/* This is global to the WASAPI target, to handle hotplug and default device lookup. */
+static IMMDeviceEnumerator *enumerator = NULL;
+
+/* PropVariantInit() is an inline function/macro in PropIdl.h that calls the C runtime's memset() directly. Use ours instead, to avoid dependency. */
+#ifdef PropVariantInit
+#undef PropVariantInit
+#endif
+#define PropVariantInit(p) SDL_zerop(p)
+
+/* handle to Avrt.dll--Vista and later!--for flagging the callback thread as "Pro Audio" (low latency). */
+static HMODULE libavrt = NULL;
+typedef HANDLE(WINAPI *pfnAvSetMmThreadCharacteristicsW)(LPWSTR, LPDWORD);
+typedef BOOL(WINAPI *pfnAvRevertMmThreadCharacteristics)(HANDLE);
+static pfnAvSetMmThreadCharacteristicsW pAvSetMmThreadCharacteristicsW = NULL;
+static pfnAvRevertMmThreadCharacteristics pAvRevertMmThreadCharacteristics = NULL;
+
+/* Some GUIDs we need to know without linking to libraries that aren't available before Vista. */
+static const CLSID SDL_CLSID_MMDeviceEnumerator = { 0xbcde0395, 0xe52f, 0x467c,{ 0x8e, 0x3d, 0xc4, 0x57, 0x92, 0x91, 0x69, 0x2e } };
+static const IID SDL_IID_IMMDeviceEnumerator = { 0xa95664d2, 0x9614, 0x4f35,{ 0xa7, 0x46, 0xde, 0x8d, 0xb6, 0x36, 0x17, 0xe6 } };
+static const IID SDL_IID_IMMNotificationClient = { 0x7991eec9, 0x7e89, 0x4d85,{ 0x83, 0x90, 0x6c, 0x70, 0x3c, 0xec, 0x60, 0xc0 } };
+static const IID SDL_IID_IMMEndpoint = { 0x1be09788, 0x6894, 0x4089,{ 0x85, 0x86, 0x9a, 0x2a, 0x6c, 0x26, 0x5a, 0xc5 } };
+static const IID SDL_IID_IAudioClient = { 0x1cb9ad4c, 0xdbfa, 0x4c32,{ 0xb1, 0x78, 0xc2, 0xf5, 0x68, 0xa7, 0x03, 0xb2 } };
+static const PROPERTYKEY SDL_PKEY_Device_FriendlyName = { { 0xa45c254e, 0xdf1c, 0x4efd,{ 0x80, 0x20, 0x67, 0xd1, 0x46, 0xa8, 0x50, 0xe0, } }, 14 };
+
+
+static char *
+GetWasapiDeviceName(IMMDevice *device)
+{
+    /* PKEY_Device_FriendlyName gives you "Speakers (SoundBlaster Pro)" which drives me nuts. I'd rather it be
+       "SoundBlaster Pro (Speakers)" but I guess that's developers vs users. Windows uses the FriendlyName in
+       its own UIs, like Volume Control, etc. */
+    char *utf8dev = NULL;
+    IPropertyStore *props = NULL;
+    if (SUCCEEDED(IMMDevice_OpenPropertyStore(device, STGM_READ, &props))) {
+        PROPVARIANT var;
+        PropVariantInit(&var);
+        if (SUCCEEDED(IPropertyStore_GetValue(props, &SDL_PKEY_Device_FriendlyName, &var))) {
+            utf8dev = WIN_StringToUTF8(var.pwszVal);
+        }
+        PropVariantClear(&var);
+        IPropertyStore_Release(props);
+    }
+    return utf8dev;
+}
+
+
+/* We need a COM subclass of IMMNotificationClient for hotplug support, which is
+   easy in C++, but we have to tapdance more to make work in C.
+   Thanks to this page for coaching on how to make this work:
+     https://www.codeproject.com/Articles/13601/COM-in-plain-C */
+
+typedef struct SDLMMNotificationClient
+{
+    const IMMNotificationClientVtbl *lpVtbl;
+    SDL_atomic_t refcount;
+} SDLMMNotificationClient;
+
+static HRESULT STDMETHODCALLTYPE
+SDLMMNotificationClient_QueryInterface(IMMNotificationClient *this, REFIID iid, void **ppv)
+{
+    if ((WIN_IsEqualIID(iid, &IID_IUnknown)) || (WIN_IsEqualIID(iid, &SDL_IID_IMMNotificationClient)))
+    {
+        *ppv = this;
+        this->lpVtbl->AddRef(this);
+        return S_OK;
+    }
+
+    *ppv = NULL;
+    return E_NOINTERFACE;
+}
+
+static ULONG STDMETHODCALLTYPE
+SDLMMNotificationClient_AddRef(IMMNotificationClient *ithis)
+{
+    SDLMMNotificationClient *this = (SDLMMNotificationClient *) ithis;
+    return (ULONG) (SDL_AtomicIncRef(&this->refcount) + 1);
+}
+
+static ULONG STDMETHODCALLTYPE
+SDLMMNotificationClient_Release(IMMNotificationClient *ithis)
+{
+    /* this is a static object; we don't ever free it. */
+    SDLMMNotificationClient *this = (SDLMMNotificationClient *) ithis;
+    const ULONG retval = SDL_AtomicDecRef(&this->refcount);
+    if (retval == 0) {
+        SDL_AtomicSet(&this->refcount, 0);  /* uhh... */
+        return 0;
+    }
+    return retval - 1;
+}
+
+/* These are the entry points called when WASAPI device endpoints change. */
+static HRESULT STDMETHODCALLTYPE
+SDLMMNotificationClient_OnDefaultDeviceChanged(IMMNotificationClient *ithis, EDataFlow flow, ERole role, LPCWSTR pwstrDeviceId)
+{
+    if (role != SDL_WASAPI_role) {
+        return S_OK;  /* ignore it. */
+    }
+
+    /* Increment the "generation," so opened devices will pick this up in their threads. */
+    switch (flow) {
+        case eRender:
+            SDL_AtomicAdd(&WASAPI_DefaultPlaybackGeneration, 1);
+            break;
+
+        case eCapture:
+            SDL_AtomicAdd(&WASAPI_DefaultCaptureGeneration, 1);
+            break;
+
+        case eAll:
+            SDL_AtomicAdd(&WASAPI_DefaultPlaybackGeneration, 1);
+            SDL_AtomicAdd(&WASAPI_DefaultCaptureGeneration, 1);
+            break;
+
+        default:
+            SDL_assert(!"uhoh, unexpected OnDefaultDeviceChange flow!");
+            break;
+    }
+
+    return S_OK;
+}
+
+static HRESULT STDMETHODCALLTYPE
+SDLMMNotificationClient_OnDeviceAdded(IMMNotificationClient *ithis, LPCWSTR pwstrDeviceId)
+{
+    /* we ignore this; devices added here then progress to ACTIVE, if appropriate, in 
+       OnDeviceStateChange, making that a better place to deal with device adds. More 
+       importantly: the first time you plug in a USB audio device, this callback will 
+       fire, but when you unplug it, it isn't removed (it's state changes to NOTPRESENT).
+       Plugging it back in won't fire this callback again. */
+    return S_OK;
+}
+
+static HRESULT STDMETHODCALLTYPE
+SDLMMNotificationClient_OnDeviceRemoved(IMMNotificationClient *ithis, LPCWSTR pwstrDeviceId)
+{
+    /* See notes in OnDeviceAdded handler about why we ignore this. */
+    return S_OK;
+}
+
+static HRESULT STDMETHODCALLTYPE
+SDLMMNotificationClient_OnDeviceStateChanged(IMMNotificationClient *ithis, LPCWSTR pwstrDeviceId, DWORD dwNewState)
+{
+    IMMDevice *device = NULL;
+
+    if (SUCCEEDED(IMMDeviceEnumerator_GetDevice(enumerator, pwstrDeviceId, &device))) {
+        IMMEndpoint *endpoint = NULL;
+        if (SUCCEEDED(IMMDevice_QueryInterface(device, &SDL_IID_IMMEndpoint, (void **) &endpoint))) {
+            EDataFlow flow;
+            if (SUCCEEDED(IMMEndpoint_GetDataFlow(endpoint, &flow))) {
+                const SDL_bool iscapture = (flow == eCapture);
+                if (dwNewState == DEVICE_STATE_ACTIVE) {
+                    char *utf8dev = GetWasapiDeviceName(device);
+                    if (utf8dev) {
+                        WASAPI_AddDevice(iscapture, utf8dev, pwstrDeviceId);
+                        SDL_free(utf8dev);
+                    }
+                } else {
+                    WASAPI_RemoveDevice(iscapture, pwstrDeviceId);
+                }
+            }
+            IMMEndpoint_Release(endpoint);
+        }
+        IMMDevice_Release(device);
+    }
+
+    return S_OK;
+}
+
+static HRESULT STDMETHODCALLTYPE
+SDLMMNotificationClient_OnPropertyValueChanged(IMMNotificationClient *this, LPCWSTR pwstrDeviceId, const PROPERTYKEY key)
+{
+    return S_OK;  /* we don't care about these. */
+}
+
+static const IMMNotificationClientVtbl notification_client_vtbl = {
+    SDLMMNotificationClient_QueryInterface,
+    SDLMMNotificationClient_AddRef,
+    SDLMMNotificationClient_Release,
+    SDLMMNotificationClient_OnDeviceStateChanged,
+    SDLMMNotificationClient_OnDeviceAdded,
+    SDLMMNotificationClient_OnDeviceRemoved,
+    SDLMMNotificationClient_OnDefaultDeviceChanged,
+    SDLMMNotificationClient_OnPropertyValueChanged
+};
+
+static SDLMMNotificationClient notification_client = { &notification_client_vtbl, { 1 } };
+
+
+int
+WASAPI_PlatformInit(void)
+{
+    HRESULT ret;
+
+    /* just skip the discussion with COM here. */
+    if (!WIN_IsWindowsVistaOrGreater()) {
+        return SDL_SetError("WASAPI support requires Windows Vista or later");
+    }
+
+    if (FAILED(WIN_CoInitialize())) {
+        return SDL_SetError("WASAPI: CoInitialize() failed");
+    }
+
+    ret = CoCreateInstance(&SDL_CLSID_MMDeviceEnumerator, NULL, CLSCTX_INPROC_SERVER, &SDL_IID_IMMDeviceEnumerator, (LPVOID) &enumerator);
+    if (FAILED(ret)) {
+        WIN_CoUninitialize();
+        return WIN_SetErrorFromHRESULT("WASAPI CoCreateInstance(MMDeviceEnumerator)", ret);
+    }
+
+    libavrt = LoadLibraryW(L"avrt.dll");  /* this library is available in Vista and later. No WinXP, so have to LoadLibrary to use it for now! */
+    if (libavrt) {
+        pAvSetMmThreadCharacteristicsW = (pfnAvSetMmThreadCharacteristicsW) GetProcAddress(libavrt, "AvSetMmThreadCharacteristicsW");
+        pAvRevertMmThreadCharacteristics = (pfnAvRevertMmThreadCharacteristics) GetProcAddress(libavrt, "AvRevertMmThreadCharacteristics");
+    }
+
+    return 0;
+}
+
+void
+WASAPI_PlatformDeinit(void)
+{
+    if (enumerator) {
+        IMMDeviceEnumerator_UnregisterEndpointNotificationCallback(enumerator, (IMMNotificationClient *) &notification_client);
+        IMMDeviceEnumerator_Release(enumerator);
+        enumerator = NULL;
+    }
+
+    if (libavrt) {
+        FreeLibrary(libavrt);
+        libavrt = NULL;
+    }
+
+    pAvSetMmThreadCharacteristicsW = NULL;
+    pAvRevertMmThreadCharacteristics = NULL;
+
+    WIN_CoUninitialize();
+}
+
+void
+WASAPI_PlatformThreadInit(_THIS)
+{
+    /* this thread uses COM. */
+    if (SUCCEEDED(WIN_CoInitialize())) {    /* can't report errors, hope it worked! */
+        this->hidden->coinitialized = SDL_TRUE;
+    }
+
+    /* Set this thread to very high "Pro Audio" priority. */
+    if (pAvSetMmThreadCharacteristicsW) {
+        DWORD idx = 0;
+        this->hidden->task = pAvSetMmThreadCharacteristicsW(TEXT("Pro Audio"), &idx);
+    }
+}
+
+void
+WASAPI_PlatformThreadDeinit(_THIS)
+{
+    /* Set this thread back to normal priority. */
+    if (this->hidden->task && pAvRevertMmThreadCharacteristics) {
+        pAvRevertMmThreadCharacteristics(this->hidden->task);
+        this->hidden->task = NULL;
+    }
+
+    if (this->hidden->coinitialized) {
+        WIN_CoUninitialize();
+        this->hidden->coinitialized = SDL_FALSE;
+    }
+}
+
+int
+WASAPI_ActivateDevice(_THIS, const SDL_bool isrecovery)
+{
+    LPCWSTR devid = this->hidden->devid;
+    IMMDevice *device = NULL;
+    HRESULT ret;
+
+    if (devid == NULL) {
+        const EDataFlow dataflow = this->iscapture ? eCapture : eRender;
+        ret = IMMDeviceEnumerator_GetDefaultAudioEndpoint(enumerator, dataflow, SDL_WASAPI_role, &device);
+    } else {
+        ret = IMMDeviceEnumerator_GetDevice(enumerator, devid, &device);
+    }
+
+    if (FAILED(ret)) {
+        SDL_assert(device == NULL);
+        this->hidden->client = NULL;
+        return WIN_SetErrorFromHRESULT("WASAPI can't find requested audio endpoint", ret);
+    }
+
+    /* this is not async in standard win32, yay! */
+    ret = IMMDevice_Activate(device, &SDL_IID_IAudioClient, CLSCTX_ALL, NULL, (void **) &this->hidden->client);
+    IMMDevice_Release(device);
+
+    if (FAILED(ret)) {
+        SDL_assert(this->hidden->client == NULL);
+        return WIN_SetErrorFromHRESULT("WASAPI can't activate audio endpoint", ret);
+    }
+
+    SDL_assert(this->hidden->client != NULL);
+    if (WASAPI_PrepDevice(this, isrecovery) == -1) {   /* not async, fire it right away. */
+        return -1;
+    }
+
+    return 0;  /* good to go. */
+}
+
+
+static void
+WASAPI_EnumerateEndpointsForFlow(const SDL_bool iscapture)
+{
+    IMMDeviceCollection *collection = NULL;
+    UINT i, total;
+
+    /* Note that WASAPI separates "adapter devices" from "audio endpoint devices"
+       ...one adapter device ("SoundBlaster Pro") might have multiple endpoint devices ("Speakers", "Line-Out"). */
+
+    if (FAILED(IMMDeviceEnumerator_EnumAudioEndpoints(enumerator, iscapture ? eCapture : eRender, DEVICE_STATE_ACTIVE, &collection))) {
+        return;
+    }
+
+    if (FAILED(IMMDeviceCollection_GetCount(collection, &total))) {
+        IMMDeviceCollection_Release(collection);
+        return;
+    }
+
+    for (i = 0; i < total; i++) {
+        IMMDevice *device = NULL;
+        if (SUCCEEDED(IMMDeviceCollection_Item(collection, i, &device))) {
+            LPWSTR devid = NULL;
+            if (SUCCEEDED(IMMDevice_GetId(device, &devid))) {
+                char *devname = GetWasapiDeviceName(device);
+                if (devname) {
+                    WASAPI_AddDevice(iscapture, devname, devid);
+                    SDL_free(devname);
+                }
+                CoTaskMemFree(devid);
+            }
+            IMMDevice_Release(device);
+        }
+    }
+
+    IMMDeviceCollection_Release(collection);
+}
+
+void
+WASAPI_EnumerateEndpoints(void)
+{
+    WASAPI_EnumerateEndpointsForFlow(SDL_FALSE);  /* playback */
+    WASAPI_EnumerateEndpointsForFlow(SDL_TRUE);  /* capture */
+
+    /* if this fails, we just won't get hotplug events. Carry on anyhow. */
+    IMMDeviceEnumerator_RegisterEndpointNotificationCallback(enumerator, (IMMNotificationClient *) &notification_client);
+}
+
+void
+WASAPI_PlatformDeleteActivationHandler(void *handler)
+{
+    /* not asynchronous. */
+    SDL_assert(!"This function should have only been called on WinRT.");
+}
+
+void
+WASAPI_BeginLoopIteration(_THIS)
+{
+    /* no-op. */
+}
+
+#endif  /* SDL_AUDIO_DRIVER_WASAPI && !defined(__WINRT__) */
+
+/* vi: set ts=4 sw=4 expandtab: */
+

Engine/lib/sdl/src/audio/wasapi/SDL_wasapi_winrt.cpp

@@ -0,0 +1,276 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "../../SDL_internal.h"
+
+// This is C++/CX code that the WinRT port uses to talk to WASAPI-related
+//  system APIs. The C implementation of these functions, for non-WinRT apps,
+//  is in SDL_wasapi_win32.c. The code in SDL_wasapi.c is used by both standard
+//  Windows and WinRT builds to deal with audio and calls into these functions.
+
+#if SDL_AUDIO_DRIVER_WASAPI && defined(__WINRT__)
+
+#include <Windows.h>
+#include <windows.ui.core.h>
+#include <windows.devices.enumeration.h>
+#include <windows.media.devices.h>
+#include <wrl/implements.h>
+
+extern "C" {
+#include "../../core/windows/SDL_windows.h"
+#include "SDL_audio.h"
+#include "SDL_timer.h"
+#include "../SDL_audio_c.h"
+#include "../SDL_sysaudio.h"
+#include "SDL_assert.h"
+#include "SDL_log.h"
+}
+
+#define COBJMACROS
+#include <mmdeviceapi.h>
+#include <audioclient.h>
+
+#include "SDL_wasapi.h"
+
+using namespace Windows::Devices::Enumeration;
+using namespace Windows::Media::Devices;
+using namespace Windows::Foundation;
+using namespace Microsoft::WRL;
+
+class SDL_WasapiDeviceEventHandler
+{
+public:
+    SDL_WasapiDeviceEventHandler(const SDL_bool _iscapture);
+    ~SDL_WasapiDeviceEventHandler();
+    void OnDeviceAdded(DeviceWatcher^ sender, DeviceInformation^ args);
+    void OnDeviceRemoved(DeviceWatcher^ sender, DeviceInformationUpdate^ args);
+    void OnDeviceUpdated(DeviceWatcher^ sender, DeviceInformationUpdate^ args);
+    void OnDefaultRenderDeviceChanged(Platform::Object^ sender, DefaultAudioRenderDeviceChangedEventArgs^ args);
+    void OnDefaultCaptureDeviceChanged(Platform::Object^ sender, DefaultAudioCaptureDeviceChangedEventArgs^ args);
+
+private:
+    const SDL_bool iscapture;
+    DeviceWatcher^ watcher;
+    Windows::Foundation::EventRegistrationToken added_handler;
+    Windows::Foundation::EventRegistrationToken removed_handler;
+    Windows::Foundation::EventRegistrationToken updated_handler;
+    Windows::Foundation::EventRegistrationToken default_changed_handler;
+};
+
+SDL_WasapiDeviceEventHandler::SDL_WasapiDeviceEventHandler(const SDL_bool _iscapture)
+    : iscapture(_iscapture)
+    , watcher(DeviceInformation::CreateWatcher(_iscapture ? DeviceClass::AudioCapture : DeviceClass::AudioRender))
+{
+    if (!watcher)
+        return;  // uhoh.
+
+    // !!! FIXME: this doesn't need a lambda here, I think, if I make SDL_WasapiDeviceEventHandler a proper C++/CX class. --ryan.
+    added_handler = watcher->Added += ref new TypedEventHandler<DeviceWatcher^, DeviceInformation^>([this](DeviceWatcher^ sender, DeviceInformation^ args) { OnDeviceAdded(sender, args); } );
+    removed_handler = watcher->Removed += ref new TypedEventHandler<DeviceWatcher^, DeviceInformationUpdate^>([this](DeviceWatcher^ sender, DeviceInformationUpdate^ args) { OnDeviceRemoved(sender, args); } );
+    updated_handler = watcher->Updated += ref new TypedEventHandler<DeviceWatcher^, DeviceInformationUpdate^>([this](DeviceWatcher^ sender, DeviceInformationUpdate^ args) { OnDeviceUpdated(sender, args); } );
+    if (iscapture) {
+        default_changed_handler = MediaDevice::DefaultAudioCaptureDeviceChanged += ref new TypedEventHandler<Platform::Object^, DefaultAudioCaptureDeviceChangedEventArgs^>([this](Platform::Object^ sender, DefaultAudioCaptureDeviceChangedEventArgs^ args) { OnDefaultCaptureDeviceChanged(sender, args); } );
+    } else {
+        default_changed_handler = MediaDevice::DefaultAudioRenderDeviceChanged += ref new TypedEventHandler<Platform::Object^, DefaultAudioRenderDeviceChangedEventArgs^>([this](Platform::Object^ sender, DefaultAudioRenderDeviceChangedEventArgs^ args) { OnDefaultRenderDeviceChanged(sender, args); } );
+    }
+    watcher->Start();
+}
+
+SDL_WasapiDeviceEventHandler::~SDL_WasapiDeviceEventHandler()
+{
+    if (watcher) {
+        watcher->Added -= added_handler;
+        watcher->Removed -= removed_handler;
+        watcher->Updated -= updated_handler;
+        watcher->Stop();
+        watcher = nullptr;
+    }
+
+    if (iscapture) {
+        MediaDevice::DefaultAudioCaptureDeviceChanged -= default_changed_handler;
+    } else {
+        MediaDevice::DefaultAudioRenderDeviceChanged -= default_changed_handler;
+    }
+}
+
+void
+SDL_WasapiDeviceEventHandler::OnDeviceAdded(DeviceWatcher^ sender, DeviceInformation^ info)
+{
+    SDL_assert(sender == this->watcher);
+    char *utf8dev = WIN_StringToUTF8(info->Name->Data());
+    if (utf8dev) {
+        WASAPI_AddDevice(this->iscapture, utf8dev, info->Id->Data());
+        SDL_free(utf8dev);
+    }
+}
+
+void
+SDL_WasapiDeviceEventHandler::OnDeviceRemoved(DeviceWatcher^ sender, DeviceInformationUpdate^ info)
+{
+    SDL_assert(sender == this->watcher);
+    WASAPI_RemoveDevice(this->iscapture, info->Id->Data());
+}
+
+void
+SDL_WasapiDeviceEventHandler::OnDeviceUpdated(DeviceWatcher^ sender, DeviceInformationUpdate^ args)
+{
+    SDL_assert(sender == this->watcher);
+}
+
+void
+SDL_WasapiDeviceEventHandler::OnDefaultRenderDeviceChanged(Platform::Object^ sender, DefaultAudioRenderDeviceChangedEventArgs^ args)
+{
+    SDL_assert(this->iscapture);
+    SDL_AtomicAdd(&WASAPI_DefaultPlaybackGeneration, 1);
+}
+
+void
+SDL_WasapiDeviceEventHandler::OnDefaultCaptureDeviceChanged(Platform::Object^ sender, DefaultAudioCaptureDeviceChangedEventArgs^ args)
+{
+    SDL_assert(!this->iscapture);
+    SDL_AtomicAdd(&WASAPI_DefaultCaptureGeneration, 1);
+}
+
+
+static SDL_WasapiDeviceEventHandler *playback_device_event_handler;
+static SDL_WasapiDeviceEventHandler *capture_device_event_handler;
+
+int WASAPI_PlatformInit(void)
+{
+    return 0;
+}
+
+void WASAPI_PlatformDeinit(void)
+{
+    delete playback_device_event_handler;
+    playback_device_event_handler = nullptr;
+    delete capture_device_event_handler;
+    capture_device_event_handler = nullptr;
+}
+
+void WASAPI_EnumerateEndpoints(void)
+{
+    // DeviceWatchers will fire an Added event for each existing device at
+    //  startup, so we don't need to enumerate them separately before
+    //  listening for updates.
+    playback_device_event_handler = new SDL_WasapiDeviceEventHandler(SDL_FALSE);
+    capture_device_event_handler = new SDL_WasapiDeviceEventHandler(SDL_TRUE);
+}
+
+struct SDL_WasapiActivationHandler : public RuntimeClass< RuntimeClassFlags< ClassicCom >, FtmBase, IActivateAudioInterfaceCompletionHandler >
+{
+    SDL_WasapiActivationHandler() : device(nullptr) {}
+    STDMETHOD(ActivateCompleted)(IActivateAudioInterfaceAsyncOperation *operation);
+    SDL_AudioDevice *device;
+};
+
+HRESULT
+SDL_WasapiActivationHandler::ActivateCompleted(IActivateAudioInterfaceAsyncOperation *async)
+{
+    HRESULT result = S_OK;
+    IUnknown *iunknown = nullptr;
+    const HRESULT ret = async->GetActivateResult(&result, &iunknown);
+
+    if (SUCCEEDED(ret) && SUCCEEDED(result)) {
+        iunknown->QueryInterface(IID_PPV_ARGS(&device->hidden->client));
+        if (device->hidden->client) {
+            // Just set a flag, since we're probably in a different thread. We'll pick it up and init everything on our own thread to prevent races.
+            SDL_AtomicSet(&device->hidden->just_activated, 1);
+        }
+    }
+
+    WASAPI_UnrefDevice(device);
+
+    return S_OK;
+}
+
+void
+WASAPI_PlatformDeleteActivationHandler(void *handler)
+{
+    ((SDL_WasapiActivationHandler *) handler)->Release();
+}
+
+int
+WASAPI_ActivateDevice(_THIS, const SDL_bool isrecovery)
+{
+    LPCWSTR devid = _this->hidden->devid;
+    Platform::String^ defdevid;
+
+    if (devid == nullptr) {
+        defdevid = _this->iscapture ? MediaDevice::GetDefaultAudioCaptureId(AudioDeviceRole::Default) : MediaDevice::GetDefaultAudioRenderId(AudioDeviceRole::Default);
+        if (defdevid) {
+            devid = defdevid->Data();
+        }
+    }
+
+    SDL_AtomicSet(&_this->hidden->just_activated, 0);
+
+    ComPtr<SDL_WasapiActivationHandler> handler = Make<SDL_WasapiActivationHandler>();
+    if (handler == nullptr) {
+        return SDL_SetError("Failed to allocate WASAPI activation handler");
+    }
+
+    handler.Get()->AddRef();  // we hold a reference after ComPtr destructs on return, causing a Release, and Release ourselves in WASAPI_PlatformDeleteActivationHandler(), etc.
+    handler.Get()->device = _this;
+    _this->hidden->activation_handler = handler.Get();
+
+    WASAPI_RefDevice(_this);  /* completion handler will unref it. */
+    IActivateAudioInterfaceAsyncOperation *async = nullptr;
+    const HRESULT ret = ActivateAudioInterfaceAsync(devid, __uuidof(IAudioClient), nullptr, handler.Get(), &async);
+
+    if (async != nullptr) {
+        async->Release();
+    }
+
+    if (FAILED(ret)) {
+        handler.Get()->Release();
+        WASAPI_UnrefDevice(_this);
+        return WIN_SetErrorFromHRESULT("WASAPI can't activate requested audio endpoint", ret);
+    }
+
+    return 0;
+}
+
+void
+WASAPI_BeginLoopIteration(_THIS)
+{
+    if (SDL_AtomicCAS(&_this->hidden->just_activated, 1, 0)) {
+        if (WASAPI_PrepDevice(_this, SDL_TRUE) == -1) {
+            SDL_OpenedAudioDeviceDisconnected(_this);
+        } 
+    }
+}
+
+void
+WASAPI_PlatformThreadInit(_THIS)
+{
+    // !!! FIXME: set this thread to "Pro Audio" priority.
+}
+
+void
+WASAPI_PlatformThreadDeinit(_THIS)
+{
+    // !!! FIXME: set this thread to "Pro Audio" priority.
+}
+
+#endif  // SDL_AUDIO_DRIVER_WASAPI && defined(__WINRT__)
+
+/* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/winmm/SDL_winmm.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -33,6 +33,40 @@
 #include "../SDL_audio_c.h"
 #include "SDL_winmm.h"
 
+/* MinGW32 mmsystem.h doesn't include these structures */
+#if defined(__MINGW32__) && defined(_MMSYSTEM_H)
+
+typedef struct tagWAVEINCAPS2W 
+{
+    WORD wMid;
+    WORD wPid;
+    MMVERSION vDriverVersion;
+    WCHAR szPname[MAXPNAMELEN];
+    DWORD dwFormats;
+    WORD wChannels;
+    WORD wReserved1;
+    GUID ManufacturerGuid;
+    GUID ProductGuid;
+    GUID NameGuid;
+} WAVEINCAPS2W,*PWAVEINCAPS2W,*NPWAVEINCAPS2W,*LPWAVEINCAPS2W;
+
+typedef struct tagWAVEOUTCAPS2W
+{
+    WORD wMid;
+    WORD wPid;
+    MMVERSION vDriverVersion;
+    WCHAR szPname[MAXPNAMELEN];
+    DWORD dwFormats;
+    WORD wChannels;
+    WORD wReserved1;
+    DWORD dwSupport;
+    GUID ManufacturerGuid;
+    GUID ProductGuid;
+    GUID NameGuid;
+} WAVEOUTCAPS2W,*PWAVEOUTCAPS2W,*NPWAVEOUTCAPS2W,*LPWAVEOUTCAPS2W;
+
+#endif /* defined(__MINGW32__) && defined(_MMSYSTEM_H) */
+
 #ifndef WAVE_FORMAT_IEEE_FLOAT
 #define WAVE_FORMAT_IEEE_FLOAT 0x0003
 #endif

Engine/lib/sdl/src/audio/winmm/SDL_winmm.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -20,8 +20,8 @@
 */
 #include "../../SDL_internal.h"
 
-#ifndef _SDL_winmm_h
-#define _SDL_winmm_h
+#ifndef SDL_winmm_h_
+#define SDL_winmm_h_
 
 #include "../SDL_sysaudio.h"
 
@@ -40,6 +40,6 @@ struct SDL_PrivateAudioData
     int next_buffer;
 };
 
-#endif /* _SDL_winmm_h */
+#endif /* SDL_winmm_h_ */
 
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/xaudio2/SDL_xaudio2.c

@@ -1,503 +0,0 @@
-/*
-  Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
-
-  This software is provided 'as-is', without any express or implied
-  warranty.  In no event will the authors be held liable for any damages
-  arising from the use of this software.
-
-  Permission is granted to anyone to use this software for any purpose,
-  including commercial applications, and to alter it and redistribute it
-  freely, subject to the following restrictions:
-
-  1. The origin of this software must not be misrepresented; you must not
-     claim that you wrote the original software. If you use this software
-     in a product, an acknowledgment in the product documentation would be
-     appreciated but is not required.
-  2. Altered source versions must be plainly marked as such, and must not be
-     misrepresented as being the original software.
-  3. This notice may not be removed or altered from any source distribution.
-*/
-
-/* WinRT NOTICE:
-
-   A few changes to SDL's XAudio2 backend were warranted by API
-   changes to Windows.  Many, but not all of these are documented by Microsoft
-   at:
-   http://blogs.msdn.com/b/chuckw/archive/2012/04/02/xaudio2-and-windows-8-consumer-preview.aspx
-
-   1. Windows' thread synchronization function, CreateSemaphore, was removed
-      from WinRT.  SDL's semaphore API was substituted instead.
-   2. The method calls, IXAudio2::GetDeviceCount and IXAudio2::GetDeviceDetails
-      were removed from the XAudio2 API.  Microsoft is telling developers to
-      use APIs in Windows::Foundation instead.
-      For SDL, the missing methods were reimplemented using the APIs Microsoft
-      said to use.
-   3. CoInitialize and CoUninitialize are not available in WinRT.
-      These calls were removed, as COM will have been initialized earlier,
-      at least by the call to the WinRT app's main function
-      (aka 'int main(Platform::Array<Platform::String^>^)).  (DLudwig:
-      This was my understanding of how WinRT: the 'main' function uses
-      a tag of [MTAThread], which should initialize COM.  My understanding
-      of COM is somewhat limited, and I may be incorrect here.)
-   4. IXAudio2::CreateMasteringVoice changed its integer-based 'DeviceIndex'
-      argument to a string-based one, 'szDeviceId'.  In WinRT, the
-      string-based argument will be used.
-*/
-#include "../../SDL_internal.h"
-
-#if SDL_AUDIO_DRIVER_XAUDIO2
-
-#include "../../core/windows/SDL_windows.h"
-#include "SDL_audio.h"
-#include "../SDL_audio_c.h"
-#include "../SDL_sysaudio.h"
-#include "SDL_assert.h"
-
-#ifdef __GNUC__
-/* The configure script already did any necessary checking */
-#  define SDL_XAUDIO2_HAS_SDK 1
-#elif defined(__WINRT__)
-/* WinRT always has access to the XAudio 2 SDK (albeit with a header file
-   that doesn't compile as C code).
-*/
-#  define SDL_XAUDIO2_HAS_SDK
-#include "SDL_xaudio2.h"    /* ... compiles as C code, in contrast to XAudio2 headers
-                               in the Windows SDK, v.10.0.10240.0 (Win 10's initial SDK)
-                             */
-#else
-/* XAudio2 exists in the last DirectX SDK as well as the latest Windows SDK.
-   To enable XAudio2 support, you will need to add the location of your DirectX SDK headers to
-   the SDL projects additional include directories and then set SDL_XAUDIO2_HAS_SDK=1 as a
-   preprocessor define
- */
-#if 0 /* See comment above */
-#include <dxsdkver.h>
-#if (!defined(_DXSDK_BUILD_MAJOR) || (_DXSDK_BUILD_MAJOR < 1284))
-#  pragma message("Your DirectX SDK is too old. Disabling XAudio2 support.")
-#else
-#  define SDL_XAUDIO2_HAS_SDK 1
-#endif
-#endif
-#endif /* 0 */
-
-#ifdef SDL_XAUDIO2_HAS_SDK
-
-/* Check to see if we're compiling for XAudio 2.8, or higher. */
-#ifdef WINVER
-#if WINVER >= 0x0602  /* Windows 8 SDK or higher? */
-#define SDL_XAUDIO2_WIN8 1
-#endif
-#endif
-
-#if !defined(_SDL_XAUDIO2_H)
-#define INITGUID 1
-#include <xaudio2.h>
-#endif
-
-/* Hidden "this" pointer for the audio functions */
-#define _THIS   SDL_AudioDevice *this
-
-#ifdef __WINRT__
-#include "SDL_xaudio2_winrthelpers.h"
-#endif
-
-/* Fixes bug 1210 where some versions of gcc need named parameters */
-#ifdef __GNUC__
-#ifdef THIS
-#undef THIS
-#endif
-#define THIS    INTERFACE *p
-#ifdef THIS_
-#undef THIS_
-#endif
-#define THIS_   INTERFACE *p,
-#endif
-
-struct SDL_PrivateAudioData
-{
-    IXAudio2 *ixa2;
-    IXAudio2SourceVoice *source;
-    IXAudio2MasteringVoice *mastering;
-    SDL_sem * semaphore;
-    Uint8 *mixbuf;
-    int mixlen;
-    Uint8 *nextbuf;
-};
-
-
-static void
-XAUDIO2_DetectDevices(void)
-{
-    IXAudio2 *ixa2 = NULL;
-    UINT32 devcount = 0;
-    UINT32 i = 0;
-
-    if (XAudio2Create(&ixa2, 0, XAUDIO2_DEFAULT_PROCESSOR) != S_OK) {
-        SDL_SetError("XAudio2: XAudio2Create() failed at detection.");
-        return;
-    } else if (IXAudio2_GetDeviceCount(ixa2, &devcount) != S_OK) {
-        SDL_SetError("XAudio2: IXAudio2::GetDeviceCount() failed.");
-        IXAudio2_Release(ixa2);
-        return;
-    }
-
-    for (i = 0; i < devcount; i++) {
-        XAUDIO2_DEVICE_DETAILS details;
-        if (IXAudio2_GetDeviceDetails(ixa2, i, &details) == S_OK) {
-            char *str = WIN_StringToUTF8(details.DisplayName);
-            if (str != NULL) {
-                SDL_AddAudioDevice(SDL_FALSE, str, (void *) ((size_t) i+1));
-                SDL_free(str);  /* SDL_AddAudioDevice made a copy of the string. */
-            }
-        }
-    }
-
-    IXAudio2_Release(ixa2);
-}
-
-static void STDMETHODCALLTYPE
-VoiceCBOnBufferEnd(THIS_ void *data)
-{
-    /* Just signal the SDL audio thread and get out of XAudio2's way. */
-    SDL_AudioDevice *this = (SDL_AudioDevice *) data;
-    SDL_SemPost(this->hidden->semaphore);
-}
-
-static void STDMETHODCALLTYPE
-VoiceCBOnVoiceError(THIS_ void *data, HRESULT Error)
-{
-    SDL_AudioDevice *this = (SDL_AudioDevice *) data;
-    SDL_OpenedAudioDeviceDisconnected(this);
-}
-
-/* no-op callbacks... */
-static void STDMETHODCALLTYPE VoiceCBOnStreamEnd(THIS) {}
-static void STDMETHODCALLTYPE VoiceCBOnVoiceProcessPassStart(THIS_ UINT32 b) {}
-static void STDMETHODCALLTYPE VoiceCBOnVoiceProcessPassEnd(THIS) {}
-static void STDMETHODCALLTYPE VoiceCBOnBufferStart(THIS_ void *data) {}
-static void STDMETHODCALLTYPE VoiceCBOnLoopEnd(THIS_ void *data) {}
-
-
-static Uint8 *
-XAUDIO2_GetDeviceBuf(_THIS)
-{
-    return this->hidden->nextbuf;
-}
-
-static void
-XAUDIO2_PlayDevice(_THIS)
-{
-    XAUDIO2_BUFFER buffer;
-    Uint8 *mixbuf = this->hidden->mixbuf;
-    Uint8 *nextbuf = this->hidden->nextbuf;
-    const int mixlen = this->hidden->mixlen;
-    IXAudio2SourceVoice *source = this->hidden->source;
-    HRESULT result = S_OK;
-
-    if (!SDL_AtomicGet(&this->enabled)) { /* shutting down? */
-        return;
-    }
-
-    /* Submit the next filled buffer */
-    SDL_zero(buffer);
-    buffer.AudioBytes = mixlen;
-    buffer.pAudioData = nextbuf;
-    buffer.pContext = this;
-
-    if (nextbuf == mixbuf) {
-        nextbuf += mixlen;
-    } else {
-        nextbuf = mixbuf;
-    }
-    this->hidden->nextbuf = nextbuf;
-
-    result = IXAudio2SourceVoice_SubmitSourceBuffer(source, &buffer, NULL);
-    if (result == XAUDIO2_E_DEVICE_INVALIDATED) {
-        /* !!! FIXME: possibly disconnected or temporary lost. Recover? */
-    }
-
-    if (result != S_OK) {  /* uhoh, panic! */
-        IXAudio2SourceVoice_FlushSourceBuffers(source);
-        SDL_OpenedAudioDeviceDisconnected(this);
-    }
-}
-
-static void
-XAUDIO2_WaitDevice(_THIS)
-{
-    if (SDL_AtomicGet(&this->enabled)) {
-        SDL_SemWait(this->hidden->semaphore);
-    }
-}
-
-static void
-XAUDIO2_PrepareToClose(_THIS)
-{
-    IXAudio2SourceVoice *source = this->hidden->source;
-    if (source) {
-        IXAudio2SourceVoice_Discontinuity(source);
-    }
-}
-
-static void
-XAUDIO2_CloseDevice(_THIS)
-{
-    IXAudio2 *ixa2 = this->hidden->ixa2;
-    IXAudio2SourceVoice *source = this->hidden->source;
-    IXAudio2MasteringVoice *mastering = this->hidden->mastering;
-
-    if (source != NULL) {
-        IXAudio2SourceVoice_Stop(source, 0, XAUDIO2_COMMIT_NOW);
-        IXAudio2SourceVoice_FlushSourceBuffers(source);
-        IXAudio2SourceVoice_DestroyVoice(source);
-    }
-    if (ixa2 != NULL) {
-        IXAudio2_StopEngine(ixa2);
-    }
-    if (mastering != NULL) {
-        IXAudio2MasteringVoice_DestroyVoice(mastering);
-    }
-    if (ixa2 != NULL) {
-        IXAudio2_Release(ixa2);
-    }
-    if (this->hidden->semaphore != NULL) {
-        SDL_DestroySemaphore(this->hidden->semaphore);
-    }
-
-    SDL_free(this->hidden->mixbuf);
-    SDL_free(this->hidden);
-}
-
-static int
-XAUDIO2_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
-{
-    HRESULT result = S_OK;
-    WAVEFORMATEX waveformat;
-    int valid_format = 0;
-    SDL_AudioFormat test_format = SDL_FirstAudioFormat(this->spec.format);
-    IXAudio2 *ixa2 = NULL;
-    IXAudio2SourceVoice *source = NULL;
-#if defined(SDL_XAUDIO2_WIN8)
-    LPCWSTR devId = NULL;
-#else
-    UINT32 devId = 0;  /* 0 == system default device. */
-#endif
-
-    static IXAudio2VoiceCallbackVtbl callbacks_vtable = {
-        VoiceCBOnVoiceProcessPassStart,
-        VoiceCBOnVoiceProcessPassEnd,
-        VoiceCBOnStreamEnd,
-        VoiceCBOnBufferStart,
-        VoiceCBOnBufferEnd,
-        VoiceCBOnLoopEnd,
-        VoiceCBOnVoiceError
-    };
-
-    static IXAudio2VoiceCallback callbacks = { &callbacks_vtable };
-
-#if defined(SDL_XAUDIO2_WIN8)
-    /* !!! FIXME: hook up hotplugging. */
-#else
-    if (handle != NULL) {  /* specific device requested? */
-        /* -1 because we increment the original value to avoid NULL. */
-        const size_t val = ((size_t) handle) - 1;
-        devId = (UINT32) val;
-    }
-#endif
-
-    if (XAudio2Create(&ixa2, 0, XAUDIO2_DEFAULT_PROCESSOR) != S_OK) {
-        return SDL_SetError("XAudio2: XAudio2Create() failed at open.");
-    }
-
-    /*
-    XAUDIO2_DEBUG_CONFIGURATION debugConfig;
-    debugConfig.TraceMask = XAUDIO2_LOG_ERRORS; //XAUDIO2_LOG_WARNINGS | XAUDIO2_LOG_DETAIL | XAUDIO2_LOG_FUNC_CALLS | XAUDIO2_LOG_TIMING | XAUDIO2_LOG_LOCKS | XAUDIO2_LOG_MEMORY | XAUDIO2_LOG_STREAMING;
-    debugConfig.BreakMask = XAUDIO2_LOG_ERRORS; //XAUDIO2_LOG_WARNINGS;
-    debugConfig.LogThreadID = TRUE;
-    debugConfig.LogFileline = TRUE;
-    debugConfig.LogFunctionName = TRUE;
-    debugConfig.LogTiming = TRUE;
-    ixa2->SetDebugConfiguration(&debugConfig);
-    */
-
-    /* Initialize all variables that we clean on shutdown */
-    this->hidden = (struct SDL_PrivateAudioData *)
-        SDL_malloc((sizeof *this->hidden));
-    if (this->hidden == NULL) {
-        IXAudio2_Release(ixa2);
-        return SDL_OutOfMemory();
-    }
-    SDL_zerop(this->hidden);
-
-    this->hidden->ixa2 = ixa2;
-    this->hidden->semaphore = SDL_CreateSemaphore(1);
-    if (this->hidden->semaphore == NULL) {
-        return SDL_SetError("XAudio2: CreateSemaphore() failed!");
-    }
-
-    while ((!valid_format) && (test_format)) {
-        switch (test_format) {
-        case AUDIO_U8:
-        case AUDIO_S16:
-        case AUDIO_S32:
-        case AUDIO_F32:
-            this->spec.format = test_format;
-            valid_format = 1;
-            break;
-        }
-        test_format = SDL_NextAudioFormat();
-    }
-
-    if (!valid_format) {
-        return SDL_SetError("XAudio2: Unsupported audio format");
-    }
-
-    /* Update the fragment size as size in bytes */
-    SDL_CalculateAudioSpec(&this->spec);
-
-    /* We feed a Source, it feeds the Mastering, which feeds the device. */
-    this->hidden->mixlen = this->spec.size;
-    this->hidden->mixbuf = (Uint8 *) SDL_malloc(2 * this->hidden->mixlen);
-    if (this->hidden->mixbuf == NULL) {
-        return SDL_OutOfMemory();
-    }
-    this->hidden->nextbuf = this->hidden->mixbuf;
-    SDL_memset(this->hidden->mixbuf, this->spec.silence, 2 * this->hidden->mixlen);
-
-    /* We use XAUDIO2_DEFAULT_CHANNELS instead of this->spec.channels. On
-       Xbox360, this means 5.1 output, but on Windows, it means "figure out
-       what the system has." It might be preferable to let XAudio2 blast
-       stereo output to appropriate surround sound configurations
-       instead of clamping to 2 channels, even though we'll configure the
-       Source Voice for whatever number of channels you supply. */
-#if SDL_XAUDIO2_WIN8
-    result = IXAudio2_CreateMasteringVoice(ixa2, &this->hidden->mastering,
-                                           XAUDIO2_DEFAULT_CHANNELS,
-                                           this->spec.freq, 0, devId, NULL, AudioCategory_GameEffects);
-#else
-    result = IXAudio2_CreateMasteringVoice(ixa2, &this->hidden->mastering,
-                                           XAUDIO2_DEFAULT_CHANNELS,
-                                           this->spec.freq, 0, devId, NULL);
-#endif
-    if (result != S_OK) {
-        return SDL_SetError("XAudio2: Couldn't create mastering voice");
-    }
-
-    SDL_zero(waveformat);
-    if (SDL_AUDIO_ISFLOAT(this->spec.format)) {
-        waveformat.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
-    } else {
-        waveformat.wFormatTag = WAVE_FORMAT_PCM;
-    }
-    waveformat.wBitsPerSample = SDL_AUDIO_BITSIZE(this->spec.format);
-    waveformat.nChannels = this->spec.channels;
-    waveformat.nSamplesPerSec = this->spec.freq;
-    waveformat.nBlockAlign =
-        waveformat.nChannels * (waveformat.wBitsPerSample / 8);
-    waveformat.nAvgBytesPerSec =
-        waveformat.nSamplesPerSec * waveformat.nBlockAlign;
-    waveformat.cbSize = sizeof(waveformat);
-
-#ifdef __WINRT__
-    // DLudwig: for now, make XAudio2 do sample rate conversion, just to
-    // get the loopwave test to work.
-    //
-    // TODO, WinRT: consider removing WinRT-specific source-voice creation code from SDL_xaudio2.c
-    result = IXAudio2_CreateSourceVoice(ixa2, &source, &waveformat,
-                                        0,
-                                        1.0f, &callbacks, NULL, NULL);
-#else
-    result = IXAudio2_CreateSourceVoice(ixa2, &source, &waveformat,
-                                        XAUDIO2_VOICE_NOSRC |
-                                        XAUDIO2_VOICE_NOPITCH,
-                                        1.0f, &callbacks, NULL, NULL);
-
-#endif
-    if (result != S_OK) {
-        return SDL_SetError("XAudio2: Couldn't create source voice");
-    }
-    this->hidden->source = source;
-
-    /* Start everything playing! */
-    result = IXAudio2_StartEngine(ixa2);
-    if (result != S_OK) {
-        return SDL_SetError("XAudio2: Couldn't start engine");
-    }
-
-    result = IXAudio2SourceVoice_Start(source, 0, XAUDIO2_COMMIT_NOW);
-    if (result != S_OK) {
-        return SDL_SetError("XAudio2: Couldn't start source voice");
-    }
-
-    return 0; /* good to go. */
-}
-
-static void
-XAUDIO2_Deinitialize(void)
-{
-#if defined(__WIN32__)
-    WIN_CoUninitialize();
-#endif
-}
-
-#endif  /* SDL_XAUDIO2_HAS_SDK */
-
-
-static int
-XAUDIO2_Init(SDL_AudioDriverImpl * impl)
-{
-#ifndef SDL_XAUDIO2_HAS_SDK
-    SDL_SetError("XAudio2: SDL was built without XAudio2 support (old DirectX SDK).");
-    return 0;  /* no XAudio2 support, ever. Update your SDK! */
-#else
-    /* XAudio2Create() is a macro that uses COM; we don't load the .dll */
-    IXAudio2 *ixa2 = NULL;
-#if defined(__WIN32__)
-    // TODO, WinRT: Investigate using CoInitializeEx here
-    if (FAILED(WIN_CoInitialize())) {
-        SDL_SetError("XAudio2: CoInitialize() failed");
-        return 0;
-    }
-#endif
-
-    if (XAudio2Create(&ixa2, 0, XAUDIO2_DEFAULT_PROCESSOR) != S_OK) {
-#if defined(__WIN32__)
-        WIN_CoUninitialize();
-#endif
-        SDL_SetError("XAudio2: XAudio2Create() failed at initialization");
-        return 0;  /* not available. */
-    }
-    IXAudio2_Release(ixa2);
-
-    /* Set the function pointers */
-    impl->DetectDevices = XAUDIO2_DetectDevices;
-    impl->OpenDevice = XAUDIO2_OpenDevice;
-    impl->PlayDevice = XAUDIO2_PlayDevice;
-    impl->WaitDevice = XAUDIO2_WaitDevice;
-    impl->PrepareToClose = XAUDIO2_PrepareToClose;
-    impl->GetDeviceBuf = XAUDIO2_GetDeviceBuf;
-    impl->CloseDevice = XAUDIO2_CloseDevice;
-    impl->Deinitialize = XAUDIO2_Deinitialize;
-
-    /* !!! FIXME: We can apparently use a C++ interface on Windows 8
-     * !!! FIXME: (Windows::Devices::Enumeration::DeviceInformation) for device
-     * !!! FIXME: detection, but it's not implemented here yet.
-     * !!! FIXME:  see http://blogs.msdn.com/b/chuckw/archive/2012/04/02/xaudio2-and-windows-8-consumer-preview.aspx
-     * !!! FIXME:  for now, force the default device.
-     */
-#if defined(SDL_XAUDIO2_WIN8) || defined(__WINRT__)
-    impl->OnlyHasDefaultOutputDevice = 1;
-#endif
-
-    return 1;   /* this audio target is available. */
-#endif
-}
-
-AudioBootStrap XAUDIO2_bootstrap = {
-    "xaudio2", "XAudio2", XAUDIO2_Init, 0
-};
-
-#endif  /* SDL_AUDIO_DRIVER_XAUDIO2 */
-
-/* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/xaudio2/SDL_xaudio2.h

@@ -1,386 +0,0 @@
-/*
-  Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
-
-  This software is provided 'as-is', without any express or implied
-  warranty.  In no event will the authors be held liable for any damages
-  arising from the use of this software.
-
-  Permission is granted to anyone to use this software for any purpose,
-  including commercial applications, and to alter it and redistribute it
-  freely, subject to the following restrictions:
-
-  1. The origin of this software must not be misrepresented; you must not
-     claim that you wrote the original software. If you use this software
-     in a product, an acknowledgment in the product documentation would be
-     appreciated but is not required.
-  2. Altered source versions must be plainly marked as such, and must not be
-     misrepresented as being the original software.
-  3. This notice may not be removed or altered from any source distribution.
-*/
-
-#ifndef _SDL_XAUDIO2_H
-#define _SDL_XAUDIO2_H
-
-#include <windows.h>
-#include <mmreg.h>
-#include <objbase.h>
-
-/* XAudio2 packs its structure members together as tightly as possible.
-   This pragma is needed to ensure compatibility with XAudio2 on 64-bit
-   platforms.
-*/
-#pragma pack(push, 1)
-
-typedef interface IXAudio2 IXAudio2;
-typedef interface IXAudio2SourceVoice IXAudio2SourceVoice;
-typedef interface IXAudio2MasteringVoice IXAudio2MasteringVoice;
-typedef interface IXAudio2EngineCallback IXAudio2EngineCallback;
-typedef interface IXAudio2VoiceCallback IXAudio2VoiceCallback;
-typedef interface IXAudio2Voice IXAudio2Voice;
-typedef interface IXAudio2SubmixVoice IXAudio2SubmixVoice;
-
-typedef enum _AUDIO_STREAM_CATEGORY {
-    AudioCategory_Other = 0,
-    AudioCategory_ForegroundOnlyMedia,
-    AudioCategory_BackgroundCapableMedia,
-    AudioCategory_Communications,
-    AudioCategory_Alerts,
-    AudioCategory_SoundEffects,
-    AudioCategory_GameEffects,
-    AudioCategory_GameMedia,
-    AudioCategory_GameChat,
-    AudioCategory_Movie,
-    AudioCategory_Media
-} AUDIO_STREAM_CATEGORY;
-
-typedef struct XAUDIO2_BUFFER {
-    UINT32     Flags;
-    UINT32     AudioBytes;
-    const BYTE *pAudioData;
-    UINT32     PlayBegin;
-    UINT32     PlayLength;
-    UINT32     LoopBegin;
-    UINT32     LoopLength;
-    UINT32     LoopCount;
-    void       *pContext;
-} XAUDIO2_BUFFER;
-
-typedef struct XAUDIO2_BUFFER_WMA {
-    const UINT32 *pDecodedPacketCumulativeBytes;
-    UINT32       PacketCount;
-} XAUDIO2_BUFFER_WMA;
-
-typedef struct XAUDIO2_SEND_DESCRIPTOR {
-    UINT32        Flags;
-    IXAudio2Voice *pOutputVoice;
-} XAUDIO2_SEND_DESCRIPTOR;
-
-typedef struct XAUDIO2_VOICE_SENDS {
-    UINT32                  SendCount;
-    XAUDIO2_SEND_DESCRIPTOR *pSends;
-} XAUDIO2_VOICE_SENDS;
-
-typedef struct XAUDIO2_EFFECT_DESCRIPTOR {
-    IUnknown *pEffect;
-    BOOL     InitialState;
-    UINT32   OutputChannels;
-} XAUDIO2_EFFECT_DESCRIPTOR;
-
-typedef struct XAUDIO2_EFFECT_CHAIN {
-    UINT32                    EffectCount;
-    XAUDIO2_EFFECT_DESCRIPTOR *pEffectDescriptors;
-} XAUDIO2_EFFECT_CHAIN;
-
-typedef struct XAUDIO2_PERFORMANCE_DATA {
-    UINT64 AudioCyclesSinceLastQuery;
-    UINT64 TotalCyclesSinceLastQuery;
-    UINT32 MinimumCyclesPerQuantum;
-    UINT32 MaximumCyclesPerQuantum;
-    UINT32 MemoryUsageInBytes;
-    UINT32 CurrentLatencyInSamples;
-    UINT32 GlitchesSinceEngineStarted;
-    UINT32 ActiveSourceVoiceCount;
-    UINT32 TotalSourceVoiceCount;
-    UINT32 ActiveSubmixVoiceCount;
-    UINT32 ActiveResamplerCount;
-    UINT32 ActiveMatrixMixCount;
-    UINT32 ActiveXmaSourceVoices;
-    UINT32 ActiveXmaStreams;
-} XAUDIO2_PERFORMANCE_DATA;
-
-typedef struct XAUDIO2_DEBUG_CONFIGURATION {
-    UINT32 TraceMask;
-    UINT32 BreakMask;
-    BOOL   LogThreadID;
-    BOOL   LogFileline;
-    BOOL   LogFunctionName;
-    BOOL   LogTiming;
-} XAUDIO2_DEBUG_CONFIGURATION;
-
-typedef struct XAUDIO2_VOICE_DETAILS {
-    UINT32 CreationFlags;
-    UINT32 ActiveFlags;
-    UINT32 InputChannels;
-    UINT32 InputSampleRate;
-} XAUDIO2_VOICE_DETAILS;
-
-typedef enum XAUDIO2_FILTER_TYPE {
-    LowPassFilter = 0,
-    BandPassFilter = 1,
-    HighPassFilter = 2,
-    NotchFilter = 3,
-    LowPassOnePoleFilter = 4,
-    HighPassOnePoleFilter = 5
-} XAUDIO2_FILTER_TYPE;
-
-typedef struct XAUDIO2_FILTER_PARAMETERS {
-    XAUDIO2_FILTER_TYPE Type;
-    float               Frequency;
-    float               OneOverQ;
-} XAUDIO2_FILTER_PARAMETERS;
-
-typedef struct XAUDIO2_VOICE_STATE {
-    void   *pCurrentBufferContext;
-    UINT32 BuffersQueued;
-    UINT64 SamplesPlayed;
-} XAUDIO2_VOICE_STATE;
-
-
-typedef UINT32 XAUDIO2_PROCESSOR;
-#define Processor1 0x00000001
-#define XAUDIO2_DEFAULT_PROCESSOR Processor1
-
-#define XAUDIO2_E_DEVICE_INVALIDATED 0x88960004
-#define XAUDIO2_COMMIT_NOW 0
-#define XAUDIO2_VOICE_NOSAMPLESPLAYED 0x0100
-#define XAUDIO2_DEFAULT_CHANNELS 0
-
-extern HRESULT __stdcall XAudio2Create(
-    _Out_ IXAudio2          **ppXAudio2,
-    _In_  UINT32            Flags,
-    _In_  XAUDIO2_PROCESSOR XAudio2Processor
-    );
-
-#undef INTERFACE
-#define INTERFACE IXAudio2
-typedef interface IXAudio2 {
-    const struct IXAudio2Vtbl FAR* lpVtbl;
-} IXAudio2;
-typedef const struct IXAudio2Vtbl IXAudio2Vtbl;
-const struct IXAudio2Vtbl
-{
-    /* IUnknown */
-    STDMETHOD(QueryInterface)(THIS_ REFIID iid, LPVOID *ppv) PURE;
-    STDMETHOD_(ULONG, AddRef)(THIS) PURE;
-    STDMETHOD_(ULONG, Release)(THIS) PURE;
-
-    /* IXAudio2 */
-    STDMETHOD_(HRESULT, RegisterForCallbacks)(THIS, IXAudio2EngineCallback *pCallback) PURE;
-    STDMETHOD_(VOID, UnregisterForCallbacks)(THIS, IXAudio2EngineCallback *pCallback) PURE;
-    STDMETHOD_(HRESULT, CreateSourceVoice)(THIS, IXAudio2SourceVoice **ppSourceVoice,
-                                           const WAVEFORMATEX *pSourceFormat,
-                                           UINT32 Flags,
-                                           float MaxFrequencyRatio,
-                                           IXAudio2VoiceCallback *pCallback,
-                                           const XAUDIO2_VOICE_SENDS *pSendList,
-                                           const XAUDIO2_EFFECT_CHAIN *pEffectChain) PURE;
-    STDMETHOD_(HRESULT, CreateSubmixVoice)(THIS, IXAudio2SubmixVoice **ppSubmixVoice,
-                                           UINT32 InputChannels,
-                                           UINT32 InputSampleRate,
-                                           UINT32 Flags,
-                                           UINT32 ProcessingStage,
-                                           const XAUDIO2_VOICE_SENDS *pSendList,
-                                           const XAUDIO2_EFFECT_CHAIN *pEffectChain) PURE;
-    STDMETHOD_(HRESULT, CreateMasteringVoice)(THIS, IXAudio2MasteringVoice **ppMasteringVoice,
-                                              UINT32 InputChannels,
-                                              UINT32 InputSampleRate,
-                                              UINT32 Flags,
-                                              LPCWSTR szDeviceId,
-                                              const XAUDIO2_EFFECT_CHAIN *pEffectChain,
-                                              AUDIO_STREAM_CATEGORY StreamCategory) PURE;
-    STDMETHOD_(HRESULT, StartEngine)(THIS) PURE;
-    STDMETHOD_(VOID, StopEngine)(THIS) PURE;
-    STDMETHOD_(HRESULT, CommitChanges)(THIS, UINT32 OperationSet) PURE;
-    STDMETHOD_(HRESULT, GetPerformanceData)(THIS, XAUDIO2_PERFORMANCE_DATA *pPerfData) PURE;
-    STDMETHOD_(HRESULT, SetDebugConfiguration)(THIS, XAUDIO2_DEBUG_CONFIGURATION *pDebugConfiguration,
-                                               VOID *pReserved) PURE;
-};
-
-#define IXAudio2_Release(A) ((A)->lpVtbl->Release(A))
-#define IXAudio2_CreateSourceVoice(A,B,C,D,E,F,G,H) ((A)->lpVtbl->CreateSourceVoice(A,B,C,D,E,F,G,H))
-#define IXAudio2_CreateMasteringVoice(A,B,C,D,E,F,G,H) ((A)->lpVtbl->CreateMasteringVoice(A,B,C,D,E,F,G,H))
-#define IXAudio2_StartEngine(A) ((A)->lpVtbl->StartEngine(A))
-#define IXAudio2_StopEngine(A) ((A)->lpVtbl->StopEngine(A))
-
-
-#undef INTERFACE
-#define INTERFACE IXAudio2SourceVoice
-typedef interface IXAudio2SourceVoice {
-    const struct IXAudio2SourceVoiceVtbl FAR* lpVtbl;
-} IXAudio2SourceVoice;
-typedef const struct IXAudio2SourceVoiceVtbl IXAudio2SourceVoiceVtbl;
-const struct IXAudio2SourceVoiceVtbl
-{
-    /* MSDN says that IXAudio2Voice inherits from IXAudio2, but MSVC's debugger
-     * says otherwise, and that IXAudio2Voice doesn't inherit from any other
-     * interface!
-     */
-
-    /* IXAudio2Voice */
-    STDMETHOD_(VOID, GetVoiceDetails)(THIS, XAUDIO2_VOICE_DETAILS *pVoiceDetails) PURE;
-    STDMETHOD_(HRESULT, SetOutputVoices)(THIS, const XAUDIO2_VOICE_SENDS *pSendList) PURE;
-    STDMETHOD_(HRESULT, SetEffectChain)(THIS, const XAUDIO2_EFFECT_CHAIN *pEffectChain) PURE;
-    STDMETHOD_(HRESULT, EnableEffect)(THIS, UINT32 EffectIndex, UINT32 OperationSet) PURE;
-    STDMETHOD_(HRESULT, DisableEffect)(THIS, UINT32 EffectIndex, UINT32 OperationSet) PURE;
-    STDMETHOD_(VOID, GetEffectState)(THIS, UINT32 EffectIndex, BOOL *pEnabled) PURE;
-    STDMETHOD_(HRESULT, SetEffectParameters)(THIS, UINT32 EffectIndex,
-                                             const void *pParameters,
-                                             UINT32 ParametersByteSize,
-                                             UINT32 OperationSet) PURE;
-    STDMETHOD_(VOID, GetEffectParameters)(THIS, UINT32 EffectIndex,
-                                          void *pParameters,
-                                          UINT32 ParametersByteSize) PURE;
-    STDMETHOD_(HRESULT, SetFilterParameters)(THIS, const XAUDIO2_FILTER_PARAMETERS *pParameters,
-                                             UINT32 OperationSet) PURE;
-    STDMETHOD_(VOID, GetFilterParameters)(THIS, XAUDIO2_FILTER_PARAMETERS *pParameters) PURE;
-    STDMETHOD_(HRESULT, SetOutputFilterParameters)(THIS, IXAudio2Voice *pDestinationVoice,
-                                                   XAUDIO2_FILTER_PARAMETERS *pParameters,
-                                                   UINT32 OperationSet) PURE;
-    STDMETHOD_(VOID, GetOutputFilterParameters)(THIS, IXAudio2Voice *pDestinationVoice,
-                                                XAUDIO2_FILTER_PARAMETERS *pParameters) PURE;
-    STDMETHOD_(HRESULT, SetVolume)(THIS, float Volume,
-                                   UINT32 OperationSet) PURE;
-    STDMETHOD_(VOID, GetVolume)(THIS, float *pVolume) PURE;
-    STDMETHOD_(HRESULT, SetChannelVolumes)(THIS, UINT32 Channels,
-                                           const float *pVolumes,
-                                           UINT32 OperationSet) PURE;
-    STDMETHOD_(VOID, GetChannelVolumes)(THIS, UINT32 Channels,
-                                        float *pVolumes) PURE;
-    STDMETHOD_(HRESULT, SetOutputMatrix)(THIS, IXAudio2Voice *pDestinationVoice,
-                                         UINT32 SourceChannels,
-                                         UINT32 DestinationChannels,
-                                         const float *pLevelMatrix,
-                                         UINT32 OperationSet) PURE;
-    STDMETHOD_(VOID, GetOutputMatrix)(THIS, IXAudio2Voice *pDestinationVoice,
-                                      UINT32 SourceChannels,
-                                      UINT32 DestinationChannels,
-                                      float *pLevelMatrix) PURE;
-    STDMETHOD_(VOID, DestroyVoice)(THIS) PURE;
-
-    /* IXAudio2SourceVoice */
-    STDMETHOD_(HRESULT, Start)(THIS, UINT32 Flags,
-                               UINT32 OperationSet) PURE;
-    STDMETHOD_(HRESULT, Stop)(THIS, UINT32 Flags,
-                              UINT32 OperationSet) PURE;
-    STDMETHOD_(HRESULT, SubmitSourceBuffer)(THIS, const XAUDIO2_BUFFER *pBuffer,
-                                            const XAUDIO2_BUFFER_WMA *pBufferWMA) PURE;
-    STDMETHOD_(HRESULT, FlushSourceBuffers)(THIS) PURE;
-    STDMETHOD_(HRESULT, Discontinuity)(THIS) PURE;
-    STDMETHOD_(HRESULT, ExitLoop)(THIS, UINT32 OperationSet) PURE;
-    STDMETHOD_(VOID, GetState)(THIS, XAUDIO2_VOICE_STATE *pVoiceState,
-                               UINT32 Flags) PURE;
-    STDMETHOD_(HRESULT, SetFrequencyRatio)(THIS, float Ratio,
-                                           UINT32 OperationSet) PURE;
-    STDMETHOD_(VOID, GetFrequencyRatio)(THIS, float *pRatio) PURE;
-    STDMETHOD_(HRESULT, SetSourceSampleRate)(THIS, UINT32 NewSourceSampleRate) PURE;
-};
-
-#define IXAudio2SourceVoice_DestroyVoice(A) ((A)->lpVtbl->DestroyVoice(A))
-#define IXAudio2SourceVoice_Start(A,B,C) ((A)->lpVtbl->Start(A,B,C))
-#define IXAudio2SourceVoice_Stop(A,B,C) ((A)->lpVtbl->Stop(A,B,C))
-#define IXAudio2SourceVoice_SubmitSourceBuffer(A,B,C) ((A)->lpVtbl->SubmitSourceBuffer(A,B,C))
-#define IXAudio2SourceVoice_FlushSourceBuffers(A) ((A)->lpVtbl->FlushSourceBuffers(A))
-#define IXAudio2SourceVoice_Discontinuity(A) ((A)->lpVtbl->Discontinuity(A))
-#define IXAudio2SourceVoice_GetState(A,B,C) ((A)->lpVtbl->GetState(A,B,C))
-
-
-#undef INTERFACE
-#define INTERFACE IXAudio2MasteringVoice
-typedef interface IXAudio2MasteringVoice {
-    const struct IXAudio2MasteringVoiceVtbl FAR* lpVtbl;
-} IXAudio2MasteringVoice;
-typedef const struct IXAudio2MasteringVoiceVtbl IXAudio2MasteringVoiceVtbl;
-const struct IXAudio2MasteringVoiceVtbl
-{
-    /* MSDN says that IXAudio2Voice inherits from IXAudio2, but MSVC's debugger
-     * says otherwise, and that IXAudio2Voice doesn't inherit from any other
-     * interface!
-     */
-
-    /* IXAudio2Voice */
-    STDMETHOD_(VOID, GetVoiceDetails)(THIS, XAUDIO2_VOICE_DETAILS *pVoiceDetails) PURE;
-    STDMETHOD_(HRESULT, SetOutputVoices)(THIS, const XAUDIO2_VOICE_SENDS *pSendList) PURE;
-    STDMETHOD_(HRESULT, SetEffectChain)(THIS, const XAUDIO2_EFFECT_CHAIN *pEffectChain) PURE;
-    STDMETHOD_(HRESULT, EnableEffect)(THIS, UINT32 EffectIndex, UINT32 OperationSet) PURE;
-    STDMETHOD_(HRESULT, DisableEffect)(THIS, UINT32 EffectIndex, UINT32 OperationSet) PURE;
-    STDMETHOD_(VOID, GetEffectState)(THIS, UINT32 EffectIndex, BOOL *pEnabled) PURE;
-    STDMETHOD_(HRESULT, SetEffectParameters)(THIS, UINT32 EffectIndex,
-                                             const void *pParameters,
-                                             UINT32 ParametersByteSize,
-                                             UINT32 OperationSet) PURE;
-    STDMETHOD_(VOID, GetEffectParameters)(THIS, UINT32 EffectIndex,
-                                          void *pParameters,
-                                          UINT32 ParametersByteSize) PURE;
-    STDMETHOD_(HRESULT, SetFilterParameters)(THIS, const XAUDIO2_FILTER_PARAMETERS *pParameters,
-                                             UINT32 OperationSet) PURE;
-    STDMETHOD_(VOID, GetFilterParameters)(THIS, XAUDIO2_FILTER_PARAMETERS *pParameters) PURE;
-    STDMETHOD_(HRESULT, SetOutputFilterParameters)(THIS, IXAudio2Voice *pDestinationVoice,
-                                                   XAUDIO2_FILTER_PARAMETERS *pParameters,
-                                                   UINT32 OperationSet) PURE;
-    STDMETHOD_(VOID, GetOutputFilterParameters)(THIS, IXAudio2Voice *pDestinationVoice,
-                                                XAUDIO2_FILTER_PARAMETERS *pParameters) PURE;
-    STDMETHOD_(HRESULT, SetVolume)(THIS, float Volume,
-                                   UINT32 OperationSet) PURE;
-    STDMETHOD_(VOID, GetVolume)(THIS, float *pVolume) PURE;
-    STDMETHOD_(HRESULT, SetChannelVolumes)(THIS, UINT32 Channels,
-                                           const float *pVolumes,
-                                           UINT32 OperationSet) PURE;
-    STDMETHOD_(VOID, GetChannelVolumes)(THIS, UINT32 Channels,
-                                        float *pVolumes) PURE;
-    STDMETHOD_(HRESULT, SetOutputMatrix)(THIS, IXAudio2Voice *pDestinationVoice,
-                                         UINT32 SourceChannels,
-                                         UINT32 DestinationChannels,
-                                         const float *pLevelMatrix,
-                                         UINT32 OperationSet) PURE;
-    STDMETHOD_(VOID, GetOutputMatrix)(THIS, IXAudio2Voice *pDestinationVoice,
-                                      UINT32 SourceChannels,
-                                      UINT32 DestinationChannels,
-                                      float *pLevelMatrix) PURE;
-    STDMETHOD_(VOID, DestroyVoice)(THIS) PURE;
-
-    /* IXAudio2SourceVoice */
-    STDMETHOD_(VOID, GetChannelMask)(THIS, DWORD *pChannelMask) PURE;
-};
-
-#define IXAudio2MasteringVoice_DestroyVoice(A) ((A)->lpVtbl->DestroyVoice(A))
-
-
-#undef INTERFACE
-#define INTERFACE IXAudio2VoiceCallback
-typedef interface IXAudio2VoiceCallback {
-    const struct IXAudio2VoiceCallbackVtbl FAR* lpVtbl;
-} IXAudio2VoiceCallback;
-typedef const struct IXAudio2VoiceCallbackVtbl IXAudio2VoiceCallbackVtbl;
-const struct IXAudio2VoiceCallbackVtbl
-{
-    /* MSDN says that IXAudio2VoiceCallback inherits from IXAudio2, but SDL's
-     * own code says otherwise, and that IXAudio2VoiceCallback doesn't inherit
-     * from any other interface!
-     */
-
-    /* IXAudio2VoiceCallback */
-    STDMETHOD_(VOID, OnVoiceProcessingPassStart)(THIS, UINT32 BytesRequired) PURE;
-    STDMETHOD_(VOID, OnVoiceProcessingPassEnd)(THIS) PURE;
-    STDMETHOD_(VOID, OnStreamEnd)(THIS) PURE;
-    STDMETHOD_(VOID, OnBufferStart)(THIS, void *pBufferContext) PURE;
-    STDMETHOD_(VOID, OnBufferEnd)(THIS, void *pBufferContext) PURE;
-    STDMETHOD_(VOID, OnLoopEnd)(THIS, void *pBufferContext) PURE;
-    STDMETHOD_(VOID, OnVoiceError)(THIS, void *pBufferContext, HRESULT Error) PURE;
-};
-
-#pragma pack(pop)   /* Undo pragma push */
-
-#endif  /* _SDL_XAUDIO2_H */
-
-/* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/audio/xaudio2/SDL_xaudio2_winrthelpers.cpp

@@ -1,90 +0,0 @@
-/*
-  Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
-
-  This software is provided 'as-is', without any express or implied
-  warranty.  In no event will the authors be held liable for any damages
-  arising from the use of this software.
-
-  Permission is granted to anyone to use this software for any purpose,
-  including commercial applications, and to alter it and redistribute it
-  freely, subject to the following restrictions:
-
-  1. The origin of this software must not be misrepresented; you must not
-     claim that you wrote the original software. If you use this software
-     in a product, an acknowledgment in the product documentation would be
-     appreciated but is not required.
-  2. Altered source versions must be plainly marked as such, and must not be
-     misrepresented as being the original software.
-  3. This notice may not be removed or altered from any source distribution.
-*/
-#include "../../SDL_internal.h"
-
-#include <xaudio2.h>
-#include "SDL_xaudio2_winrthelpers.h"
-
-#if WINAPI_FAMILY != WINAPI_FAMILY_PHONE_APP
-using Windows::Devices::Enumeration::DeviceClass;
-using Windows::Devices::Enumeration::DeviceInformation;
-using Windows::Devices::Enumeration::DeviceInformationCollection;
-#endif
-
-extern "C" HRESULT __cdecl IXAudio2_GetDeviceCount(IXAudio2 * ixa2, UINT32 * devcount)
-{
-#if WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP
-    // There doesn't seem to be any audio device enumeration on Windows Phone.
-    // In lieu of this, just treat things as if there is one and only one
-    // audio device.
-    *devcount = 1;
-    return S_OK;
-#else
-    // TODO, WinRT: make xaudio2 device enumeration only happen once, and in the background
-    auto operation = DeviceInformation::FindAllAsync(DeviceClass::AudioRender);
-    while (operation->Status != Windows::Foundation::AsyncStatus::Completed)
-    {
-    }
- 
-    DeviceInformationCollection^ devices = operation->GetResults();
-    *devcount = devices->Size;
-    return S_OK;
-#endif
-}
-
-extern "C" HRESULT IXAudio2_GetDeviceDetails(IXAudio2 * unused, UINT32 index, XAUDIO2_DEVICE_DETAILS * details)
-{
-#if WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP
-    // Windows Phone doesn't seem to have the same device enumeration APIs that
-    // Windows 8/RT has, or it doesn't have them at all.  In lieu of this,
-    // just treat things as if there is one, and only one, default device.
-    if (index != 0)
-    {
-        return XAUDIO2_E_INVALID_CALL;
-    }
-
-    if (details)
-    {
-        wcsncpy_s(details->DeviceID, ARRAYSIZE(details->DeviceID), L"default", _TRUNCATE);
-        wcsncpy_s(details->DisplayName, ARRAYSIZE(details->DisplayName), L"default", _TRUNCATE);
-    }
-    return S_OK;
-#else
-    auto operation = DeviceInformation::FindAllAsync(DeviceClass::AudioRender);
-    while (operation->Status != Windows::Foundation::AsyncStatus::Completed)
-    {
-    }
- 
-    DeviceInformationCollection^ devices = operation->GetResults();
-    if (index >= devices->Size)
-    {
-        return XAUDIO2_E_INVALID_CALL;
-    }
-
-    DeviceInformation^ d = devices->GetAt(index);
-    if (details)
-    {
-        wcsncpy_s(details->DeviceID, ARRAYSIZE(details->DeviceID), d->Id->Data(), _TRUNCATE);
-        wcsncpy_s(details->DisplayName, ARRAYSIZE(details->DisplayName), d->Name->Data(), _TRUNCATE);
-    }
-    return S_OK;
-#endif
-}

Engine/lib/sdl/src/audio/xaudio2/SDL_xaudio2_winrthelpers.h

@@ -1,70 +0,0 @@
-/*
-  Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
-
-  This software is provided 'as-is', without any express or implied
-  warranty.  In no event will the authors be held liable for any damages
-  arising from the use of this software.
-
-  Permission is granted to anyone to use this software for any purpose,
-  including commercial applications, and to alter it and redistribute it
-  freely, subject to the following restrictions:
-
-  1. The origin of this software must not be misrepresented; you must not
-     claim that you wrote the original software. If you use this software
-     in a product, an acknowledgment in the product documentation would be
-     appreciated but is not required.
-  2. Altered source versions must be plainly marked as such, and must not be
-     misrepresented as being the original software.
-  3. This notice may not be removed or altered from any source distribution.
-*/
-
-//
-// Re-implementation of methods removed from XAudio2 (in WinRT):
-//
-
-typedef struct XAUDIO2_DEVICE_DETAILS
-{
-    WCHAR DeviceID[256];
-    WCHAR DisplayName[256];
-    /* Other fields exist in the pre-Windows 8 version of this struct, however
-       they weren't used by SDL, so they weren't added.
-    */
-} XAUDIO2_DEVICE_DETAILS;
-
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-HRESULT IXAudio2_GetDeviceCount(IXAudio2 * unused, UINT32 * devcount);
-HRESULT IXAudio2_GetDeviceDetails(IXAudio2 * unused, UINT32 index, XAUDIO2_DEVICE_DETAILS * details);
-
-#ifdef __cplusplus
-}
-#endif
-
-
-//
-// C-style macros to call XAudio2's methods in C++:
-//
-#ifdef __cplusplus
-/*
-#define IXAudio2_CreateMasteringVoice(A, B, C, D, E, F, G) (A)->CreateMasteringVoice((B), (C), (D), (E), (F), (G))
-#define IXAudio2_CreateSourceVoice(A, B, C, D, E, F, G, H) (A)->CreateSourceVoice((B), (C), (D), (E), (F), (G), (H))
-#define IXAudio2_QueryInterface(A, B, C) (A)->QueryInterface((B), (C))
-#define IXAudio2_Release(A) (A)->Release()
-#define IXAudio2_StartEngine(A) (A)->StartEngine()
-#define IXAudio2_StopEngine(A) (A)->StopEngine()
-
-#define IXAudio2MasteringVoice_DestroyVoice(A) (A)->DestroyVoice()
-
-#define IXAudio2SourceVoice_DestroyVoice(A) (A)->DestroyVoice()
-#define IXAudio2SourceVoice_Discontinuity(A) (A)->Discontinuity()
-#define IXAudio2SourceVoice_FlushSourceBuffers(A) (A)->FlushSourceBuffers()
-#define IXAudio2SourceVoice_GetState(A, B) (A)->GetState((B))
-#define IXAudio2SourceVoice_Start(A, B, C) (A)->Start((B), (C))
-#define IXAudio2SourceVoice_Stop(A, B, C) (A)->Stop((B), (C))
-#define IXAudio2SourceVoice_SubmitSourceBuffer(A, B, C) (A)->SubmitSourceBuffer((B), (C))
-*/
-#endif // ifdef __cplusplus

Engine/lib/sdl/src/core/android/SDL_android.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -34,11 +34,17 @@ extern "C" {
 
 /* Interface from the SDL library into the Android Java activity */
 extern void Android_JNI_SetActivityTitle(const char *title);
+extern void Android_JNI_SetWindowStyle(SDL_bool fullscreen);
+extern void Android_JNI_SetOrientation(int w, int h, int resizable, const char *hint);
+
 extern SDL_bool Android_JNI_GetAccelerometerValues(float values[3]);
 extern void Android_JNI_ShowTextInput(SDL_Rect *inputRect);
 extern void Android_JNI_HideTextInput(void);
+extern SDL_bool Android_JNI_IsScreenKeyboardShown(void);
 extern ANativeWindow* Android_JNI_GetNativeWindow(void);
 
+extern int Android_JNI_GetDisplayDPI(float *ddpi, float *xdpi, float *ydpi);
+
 /* Audio support */
 extern int Android_JNI_OpenAudioDevice(int iscapture, int sampleRate, int is16Bit, int channelCount, int desiredBufferFrames);
 extern void* Android_JNI_GetAudioBuffer(void);
@@ -56,6 +62,9 @@ size_t Android_JNI_FileRead(SDL_RWops* ctx, void* buffer, size_t size, size_t ma
 size_t Android_JNI_FileWrite(SDL_RWops* ctx, const void* buffer, size_t size, size_t num);
 int Android_JNI_FileClose(SDL_RWops* ctx);
 
+/* Environment support */
+void Android_JNI_GetManifestEnvironmentVariables(void);
+
 /* Clipboard support */
 int Android_JNI_SetClipboardText(const char* text);
 char* Android_JNI_GetClipboardText(void);
@@ -67,21 +76,32 @@ int Android_JNI_GetPowerInfo(int* plugged, int* charged, int* battery, int* seco
 /* Joystick support */
 void Android_JNI_PollInputDevices(void);
 
+/* Haptic support */
+void Android_JNI_PollHapticDevices(void);
+void Android_JNI_HapticRun(int device_id, int length);
+
 /* Video */
 void Android_JNI_SuspendScreenSaver(SDL_bool suspend);
 
 /* Touch support */
 int Android_JNI_GetTouchDeviceIds(int **ids);
+void Android_JNI_SetSeparateMouseAndTouch(SDL_bool new_value);
 
 /* Threads */
 #include <jni.h>
 JNIEnv *Android_JNI_GetEnv(void);
 int Android_JNI_SetupThread(void);
-jclass Android_JNI_GetActivityClass(void);
 
 /* Generic messages */
 int Android_JNI_SendMessage(int command, int param);
 
+/* Init */
+JNIEXPORT void JNICALL SDL_Android_Init(JNIEnv* mEnv, jclass cls);
+
+/* MessageBox */
+#include "SDL_messagebox.h"
+int Android_JNI_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonid);
+
 /* Ends C function definitions when using C++ */
 #ifdef __cplusplus
 /* *INDENT-OFF* */

Engine/lib/sdl/src/core/android/keyinfotable.h

@@ -0,0 +1,175 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#ifndef _ANDROID_KeyInfo
+#define _ANDROID_KeyInfo
+
+#include "SDL_scancode.h"
+#include "SDL_keycode.h"
+
+/*
+    This file is used by the keyboard code in SDL_uikitview.m to convert between characters
+    passed in from the iPhone's virtual keyboard, and tuples of SDL_Scancode and SDL_keymods.
+    For example unicharToUIKeyInfoTable['a'] would give you the scan code and keymod for lower
+    case a.
+*/
+
+typedef struct
+{
+    SDL_Scancode code;
+    uint16_t mod;
+} AndroidKeyInfo;
+
+/* So far only ASCII characters here */
+static AndroidKeyInfo unicharToAndroidKeyInfoTable[] = {
+/*  0 */  {  SDL_SCANCODE_UNKNOWN, 0 },
+/*  1 */  {  SDL_SCANCODE_UNKNOWN, 0 },
+/*  2 */  {  SDL_SCANCODE_UNKNOWN, 0 },
+/*  3 */  {  SDL_SCANCODE_UNKNOWN, 0 },
+/*  4 */  {  SDL_SCANCODE_UNKNOWN, 0 },
+/*  5 */  {  SDL_SCANCODE_UNKNOWN, 0 },
+/*  6 */  {  SDL_SCANCODE_UNKNOWN, 0 },
+/*  7 */  {  SDL_SCANCODE_UNKNOWN, 0 },
+/*  8 */  {  SDL_SCANCODE_UNKNOWN, 0 },
+/*  9 */  {  SDL_SCANCODE_UNKNOWN, 0 },
+/*  10 */ {   SDL_SCANCODE_UNKNOWN, 0 },
+/*  11 */ {   SDL_SCANCODE_UNKNOWN, 0 },
+/*  12 */ {   SDL_SCANCODE_UNKNOWN, 0 },
+/*  13 */ {   SDL_SCANCODE_RETURN, 0 },
+/*  14 */ {   SDL_SCANCODE_UNKNOWN, 0 },
+/*  15 */ {   SDL_SCANCODE_UNKNOWN, 0 },
+/*  16 */ {   SDL_SCANCODE_UNKNOWN, 0 },
+/*  17 */ {   SDL_SCANCODE_UNKNOWN, 0 },
+/*  18 */ {   SDL_SCANCODE_UNKNOWN, 0 },
+/*  19 */ {   SDL_SCANCODE_UNKNOWN, 0 },
+/*  20 */ {   SDL_SCANCODE_UNKNOWN, 0 },
+/*  21 */ {   SDL_SCANCODE_UNKNOWN, 0 },
+/*  22 */ {   SDL_SCANCODE_UNKNOWN, 0 },
+/*  23 */ {   SDL_SCANCODE_UNKNOWN, 0 },
+/*  24 */ {   SDL_SCANCODE_UNKNOWN, 0 },
+/*  25 */ {   SDL_SCANCODE_UNKNOWN, 0 },
+/*  26 */ {   SDL_SCANCODE_UNKNOWN, 0 },
+/*  27 */ {   SDL_SCANCODE_UNKNOWN, 0 },
+/*  28 */ {   SDL_SCANCODE_UNKNOWN, 0 },
+/*  29 */ {   SDL_SCANCODE_UNKNOWN, 0 },
+/*  30 */ {   SDL_SCANCODE_UNKNOWN, 0 },
+/*  31 */ {   SDL_SCANCODE_UNKNOWN, 0 },
+/*  32 */ {   SDL_SCANCODE_SPACE, 0 },
+/*  33 */ {   SDL_SCANCODE_1,    KMOD_SHIFT },        /* plus shift modifier '!' */
+/*  34 */ {   SDL_SCANCODE_APOSTROPHE, KMOD_SHIFT },    /* plus shift modifier '"' */
+/*  35 */ {   SDL_SCANCODE_3, KMOD_SHIFT },            /* plus shift modifier '#' */
+/*  36 */ {   SDL_SCANCODE_4, KMOD_SHIFT },            /* plus shift modifier '$' */
+/*  37 */ {   SDL_SCANCODE_5, KMOD_SHIFT },            /* plus shift modifier '%' */
+/*  38 */ {   SDL_SCANCODE_7, KMOD_SHIFT },            /* plus shift modifier '&' */
+/*  39 */ {   SDL_SCANCODE_APOSTROPHE, 0 },    /* '''                       */
+/*  40 */ {   SDL_SCANCODE_9, KMOD_SHIFT },             /* plus shift modifier '(' */
+/*  41 */ {   SDL_SCANCODE_0, KMOD_SHIFT },            /* plus shift modifier ')' */
+/*  42 */ {   SDL_SCANCODE_8, KMOD_SHIFT },            /* '*' */
+/*  43 */ {   SDL_SCANCODE_EQUALS, KMOD_SHIFT },    /* plus shift modifier '+' */
+/*  44 */ {   SDL_SCANCODE_COMMA, 0 },        /* ','                       */
+/*  45 */ {   SDL_SCANCODE_MINUS, 0 },        /* '-'                       */
+/*  46 */ {   SDL_SCANCODE_PERIOD, 0 },        /* '.'                       */
+/*  47 */ {   SDL_SCANCODE_SLASH, 0 },        /* '/'                       */
+/*  48 */ {   SDL_SCANCODE_0, 0    },
+/*  49 */ {   SDL_SCANCODE_1, 0 },
+/*  50 */ {   SDL_SCANCODE_2, 0 },
+/*  51 */ {   SDL_SCANCODE_3, 0 },
+/*  52 */ {   SDL_SCANCODE_4, 0 },
+/*  53 */ {   SDL_SCANCODE_5, 0 },
+/*  54 */ {   SDL_SCANCODE_6, 0 },
+/*  55 */ {   SDL_SCANCODE_7, 0 },
+/*  56 */ {   SDL_SCANCODE_8, 0 },
+/*  57 */ {   SDL_SCANCODE_9, 0 },
+/*  58 */ {   SDL_SCANCODE_SEMICOLON,  KMOD_SHIFT },    /* plus shift modifier ';' */
+/*  59 */ {   SDL_SCANCODE_SEMICOLON, 0 },
+/*  60 */ {   SDL_SCANCODE_COMMA,  KMOD_SHIFT },         /* plus shift modifier '<' */
+/*  61 */ {   SDL_SCANCODE_EQUALS, 0 },
+/*  62 */ {   SDL_SCANCODE_PERIOD,  KMOD_SHIFT },        /* plus shift modifier '>' */
+/*  63 */ {   SDL_SCANCODE_SLASH,  KMOD_SHIFT },        /* plus shift modifier '?' */
+/*  64 */ {   SDL_SCANCODE_2,  KMOD_SHIFT },            /* plus shift modifier '@' */
+/*  65 */ {   SDL_SCANCODE_A,  KMOD_SHIFT },            /* all the following need shift modifiers */
+/*  66 */ {   SDL_SCANCODE_B,  KMOD_SHIFT },
+/*  67 */ {   SDL_SCANCODE_C,  KMOD_SHIFT },
+/*  68 */ {   SDL_SCANCODE_D,  KMOD_SHIFT },
+/*  69 */ {   SDL_SCANCODE_E,  KMOD_SHIFT },
+/*  70 */ {   SDL_SCANCODE_F,  KMOD_SHIFT },
+/*  71 */ {   SDL_SCANCODE_G,  KMOD_SHIFT },
+/*  72 */ {   SDL_SCANCODE_H,  KMOD_SHIFT },
+/*  73 */ {   SDL_SCANCODE_I,  KMOD_SHIFT },
+/*  74 */ {   SDL_SCANCODE_J,  KMOD_SHIFT },
+/*  75 */ {   SDL_SCANCODE_K,  KMOD_SHIFT },
+/*  76 */ {   SDL_SCANCODE_L,  KMOD_SHIFT },
+/*  77 */ {   SDL_SCANCODE_M,  KMOD_SHIFT },
+/*  78 */ {   SDL_SCANCODE_N,  KMOD_SHIFT },
+/*  79 */ {   SDL_SCANCODE_O,  KMOD_SHIFT },
+/*  80 */ {   SDL_SCANCODE_P,  KMOD_SHIFT },
+/*  81 */ {   SDL_SCANCODE_Q,  KMOD_SHIFT },
+/*  82 */ {   SDL_SCANCODE_R,  KMOD_SHIFT },
+/*  83 */ {   SDL_SCANCODE_S,  KMOD_SHIFT },
+/*  84 */ {   SDL_SCANCODE_T,  KMOD_SHIFT },
+/*  85 */ {   SDL_SCANCODE_U,  KMOD_SHIFT },
+/*  86 */ {   SDL_SCANCODE_V,  KMOD_SHIFT },
+/*  87 */ {   SDL_SCANCODE_W,  KMOD_SHIFT },
+/*  88 */ {   SDL_SCANCODE_X,  KMOD_SHIFT },
+/*  89 */ {   SDL_SCANCODE_Y,  KMOD_SHIFT },
+/*  90 */ {   SDL_SCANCODE_Z,  KMOD_SHIFT },
+/*  91 */ {   SDL_SCANCODE_LEFTBRACKET, 0 },
+/*  92 */ {   SDL_SCANCODE_BACKSLASH, 0 },
+/*  93 */ {   SDL_SCANCODE_RIGHTBRACKET, 0 },
+/*  94 */ {   SDL_SCANCODE_6,  KMOD_SHIFT },            /* plus shift modifier '^' */
+/*  95 */ {   SDL_SCANCODE_MINUS,  KMOD_SHIFT },        /* plus shift modifier '_' */
+/*  96 */ {   SDL_SCANCODE_GRAVE,  KMOD_SHIFT },        /* '`' */
+/*  97 */ {   SDL_SCANCODE_A, 0    },
+/*  98 */ {   SDL_SCANCODE_B, 0 },
+/*  99 */ {   SDL_SCANCODE_C, 0 },
+/*  100 */{    SDL_SCANCODE_D, 0 },
+/*  101 */{    SDL_SCANCODE_E, 0 },
+/*  102 */{    SDL_SCANCODE_F, 0 },
+/*  103 */{    SDL_SCANCODE_G, 0 },
+/*  104 */{    SDL_SCANCODE_H, 0 },
+/*  105 */{    SDL_SCANCODE_I, 0 },
+/*  106 */{    SDL_SCANCODE_J, 0 },
+/*  107 */{    SDL_SCANCODE_K, 0 },
+/*  108 */{    SDL_SCANCODE_L, 0 },
+/*  109 */{    SDL_SCANCODE_M, 0 },
+/*  110 */{    SDL_SCANCODE_N, 0 },
+/*  111 */{    SDL_SCANCODE_O, 0 },
+/*  112 */{    SDL_SCANCODE_P, 0 },
+/*  113 */{    SDL_SCANCODE_Q, 0 },
+/*  114 */{    SDL_SCANCODE_R, 0 },
+/*  115 */{    SDL_SCANCODE_S, 0 },
+/*  116 */{    SDL_SCANCODE_T, 0 },
+/*  117 */{    SDL_SCANCODE_U, 0 },
+/*  118 */{    SDL_SCANCODE_V, 0 },
+/*  119 */{    SDL_SCANCODE_W, 0 },
+/*  120 */{    SDL_SCANCODE_X, 0 },
+/*  121 */{    SDL_SCANCODE_Y, 0 },
+/*  122 */{    SDL_SCANCODE_Z, 0 },
+/*  123 */{    SDL_SCANCODE_LEFTBRACKET, KMOD_SHIFT },    /* plus shift modifier '{' */
+/*  124 */{    SDL_SCANCODE_BACKSLASH, KMOD_SHIFT },    /* plus shift modifier '|' */
+/*  125 */{    SDL_SCANCODE_RIGHTBRACKET, KMOD_SHIFT },    /* plus shift modifier '}' */
+/*  126 */{    SDL_SCANCODE_GRAVE, KMOD_SHIFT },         /* plus shift modifier '~' */
+/*  127 */{    SDL_SCANCODE_BACKSPACE, KMOD_SHIFT }
+};
+
+#endif /* _ANDROID_KeyInfo */
+
+/* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/core/linux/SDL_dbus.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -56,7 +56,9 @@ LoadDBUSSyms(void)
     SDL_DBUS_SYM(message_is_signal);
     SDL_DBUS_SYM(message_new_method_call);
     SDL_DBUS_SYM(message_append_args);
+    SDL_DBUS_SYM(message_append_args_valist);
     SDL_DBUS_SYM(message_get_args);
+    SDL_DBUS_SYM(message_get_args_valist);
     SDL_DBUS_SYM(message_iter_init);
     SDL_DBUS_SYM(message_iter_next);
     SDL_DBUS_SYM(message_iter_get_basic);
@@ -68,6 +70,7 @@ LoadDBUSSyms(void)
     SDL_DBUS_SYM(error_free);
     SDL_DBUS_SYM(get_local_machine_id);
     SDL_DBUS_SYM(free);
+    SDL_DBUS_SYM(free_string_array);
     SDL_DBUS_SYM(shutdown);
 
     #undef SDL_DBUS_SYM
@@ -112,14 +115,15 @@ SDL_DBus_Init(void)
         DBusError err;
         dbus.error_init(&err);
         dbus.session_conn = dbus.bus_get_private(DBUS_BUS_SESSION, &err);
+        if (!dbus.error_is_set(&err)) {
+            dbus.system_conn = dbus.bus_get_private(DBUS_BUS_SYSTEM, &err);
+        }
         if (dbus.error_is_set(&err)) {
             dbus.error_free(&err);
-            if (dbus.session_conn) {
-                dbus.connection_unref(dbus.session_conn);
-                dbus.session_conn = NULL;
-            }
+            SDL_DBus_Quit();
             return;  /* oh well */
         }
+        dbus.connection_set_exit_on_disconnect(dbus.system_conn, 0);
         dbus.connection_set_exit_on_disconnect(dbus.session_conn, 0);
     }
 }
@@ -127,12 +131,23 @@ SDL_DBus_Init(void)
 void
 SDL_DBus_Quit(void)
 {
+    if (dbus.system_conn) {
+        dbus.connection_close(dbus.system_conn);
+        dbus.connection_unref(dbus.system_conn);
+    }
     if (dbus.session_conn) {
         dbus.connection_close(dbus.session_conn);
         dbus.connection_unref(dbus.session_conn);
-        dbus.shutdown();
-        SDL_memset(&dbus, 0, sizeof(dbus));
     }
+/* Don't do this - bug 3950
+   dbus_shutdown() is a debug feature which closes all global resources in the dbus library. Calling this should be done by the app, not a library, because if there are multiple users of dbus in the process then SDL could shut it down even though another part is using it.
+*/
+#if 0
+    if (dbus.shutdown) {
+        dbus.shutdown();
+    }
+#endif
+    SDL_zero(dbus);
     UnloadDBUSLibrary();
 }
 
@@ -150,90 +165,171 @@ SDL_DBus_GetContext(void)
     }
 }
 
-void
-SDL_DBus_ScreensaverTickle(void)
+static SDL_bool
+SDL_DBus_CallMethodInternal(DBusConnection *conn, const char *node, const char *path, const char *interface, const char *method, va_list ap)
 {
-    DBusConnection *conn = dbus.session_conn;
-    if (conn != NULL) {
-        DBusMessage *msg = dbus.message_new_method_call("org.gnome.ScreenSaver",
-                                                        "/org/gnome/ScreenSaver",
-                                                        "org.gnome.ScreenSaver",
-                                                        "SimulateUserActivity");
-        if (msg != NULL) {
-            if (dbus.connection_send(conn, msg, NULL)) {
-                dbus.connection_flush(conn);
+    SDL_bool retval = SDL_FALSE;
+
+    if (conn) {
+        DBusMessage *msg = dbus.message_new_method_call(node, path, interface, method);
+        if (msg) {
+            int firstarg = va_arg(ap, int);
+            if ((firstarg == DBUS_TYPE_INVALID) || dbus.message_append_args_valist(msg, firstarg, ap)) {
+                DBusMessage *reply = dbus.connection_send_with_reply_and_block(conn, msg, 300, NULL);
+                if (reply) {
+                    firstarg = va_arg(ap, int);
+                    if ((firstarg == DBUS_TYPE_INVALID) || dbus.message_get_args_valist(reply, NULL, firstarg, ap)) {
+                        retval = SDL_TRUE;
+                    }
+                    dbus.message_unref(reply);
+                }
             }
             dbus.message_unref(msg);
         }
     }
+
+    return retval;
+}
+
+SDL_bool
+SDL_DBus_CallMethodOnConnection(DBusConnection *conn, const char *node, const char *path, const char *interface, const char *method, ...)
+{
+    SDL_bool retval;
+    va_list ap;
+    va_start(ap, method);
+    retval = SDL_DBus_CallMethodInternal(conn, node, path, interface, method, ap);
+    va_end(ap);
+    return retval;
+}
+
+SDL_bool
+SDL_DBus_CallMethod(const char *node, const char *path, const char *interface, const char *method, ...)
+{
+    SDL_bool retval;
+    va_list ap;
+    va_start(ap, method);
+    retval = SDL_DBus_CallMethodInternal(dbus.session_conn, node, path, interface, method, ap);
+    va_end(ap);
+    return retval;
+}
+
+static SDL_bool
+SDL_DBus_CallVoidMethodInternal(DBusConnection *conn, const char *node, const char *path, const char *interface, const char *method, va_list ap)
+{
+    SDL_bool retval = SDL_FALSE;
+
+    if (conn) {
+        DBusMessage *msg = dbus.message_new_method_call(node, path, interface, method);
+        if (msg) {
+            int firstarg = va_arg(ap, int);
+            if ((firstarg == DBUS_TYPE_INVALID) || dbus.message_append_args_valist(msg, firstarg, ap)) {
+                if (dbus.connection_send(conn, msg, NULL)) {
+                    dbus.connection_flush(conn);
+                    retval = SDL_TRUE;
+                }
+            }
+
+            dbus.message_unref(msg);
+        }
+    }
+
+    return retval;
+}
+
+SDL_bool
+SDL_DBus_CallVoidMethodOnConnection(DBusConnection *conn, const char *node, const char *path, const char *interface, const char *method, ...)
+{
+    SDL_bool retval;
+    va_list ap;
+    va_start(ap, method);
+    retval = SDL_DBus_CallVoidMethodInternal(conn, node, path, interface, method, ap);
+    va_end(ap);
+    return retval;
+}
+
+SDL_bool
+SDL_DBus_CallVoidMethod(const char *node, const char *path, const char *interface, const char *method, ...)
+{
+    SDL_bool retval;
+    va_list ap;
+    va_start(ap, method);
+    retval = SDL_DBus_CallVoidMethodInternal(dbus.session_conn, node, path, interface, method, ap);
+    va_end(ap);
+    return retval;
+}
+
+SDL_bool
+SDL_DBus_QueryPropertyOnConnection(DBusConnection *conn, const char *node, const char *path, const char *interface, const char *property, const int expectedtype, void *result)
+{
+    SDL_bool retval = SDL_FALSE;
+
+    if (conn) {
+        DBusMessage *msg = dbus.message_new_method_call(node, path, "org.freedesktop.DBus.Properties", "Get");
+        if (msg) {
+            if (dbus.message_append_args(msg, DBUS_TYPE_STRING, &interface, DBUS_TYPE_STRING, &property, DBUS_TYPE_INVALID)) {
+                DBusMessage *reply = dbus.connection_send_with_reply_and_block(conn, msg, 300, NULL);
+                if (reply) {
+                    DBusMessageIter iter, sub;
+                    dbus.message_iter_init(reply, &iter);
+                    if (dbus.message_iter_get_arg_type(&iter) == DBUS_TYPE_VARIANT) {
+                        dbus.message_iter_recurse(&iter, &sub);
+                        if (dbus.message_iter_get_arg_type(&sub) == expectedtype) {
+                            dbus.message_iter_get_basic(&sub, result);
+                            retval = SDL_TRUE;
+                        }
+                    }
+                    dbus.message_unref(reply);
+                }
+            }
+            dbus.message_unref(msg);
+        }
+    }
+
+    return retval;
+}
+
+SDL_bool
+SDL_DBus_QueryProperty(const char *node, const char *path, const char *interface, const char *property, const int expectedtype, void *result)
+{
+    return SDL_DBus_QueryPropertyOnConnection(dbus.session_conn, node, path, interface, property, expectedtype, result);
+}
+
+
+void
+SDL_DBus_ScreensaverTickle(void)
+{
+    SDL_DBus_CallVoidMethod("org.gnome.ScreenSaver", "/org/gnome/ScreenSaver", "org.gnome.ScreenSaver", "SimulateUserActivity", DBUS_TYPE_INVALID);
 }
 
 SDL_bool
 SDL_DBus_ScreensaverInhibit(SDL_bool inhibit)
 {
-    DBusConnection *conn = dbus.session_conn;
-
-    if (conn == NULL)
-        return SDL_FALSE;
-
-    if (inhibit &&
-        screensaver_cookie != 0)
-        return SDL_TRUE;
-    if (!inhibit &&
-        screensaver_cookie == 0)
-        return SDL_TRUE;
-
-    if (inhibit) {
-        const char *app = "My SDL application";
-        const char *reason = "Playing a game";
-
-        DBusMessage *msg = dbus.message_new_method_call("org.freedesktop.ScreenSaver",
-                                                         "/org/freedesktop/ScreenSaver",
-                                                         "org.freedesktop.ScreenSaver",
-                                                         "Inhibit");
-        if (msg != NULL) {
-            dbus.message_append_args (msg,
-                                      DBUS_TYPE_STRING, &app,
-                                      DBUS_TYPE_STRING, &reason,
-                                      DBUS_TYPE_INVALID);
-        }
-
-        if (msg != NULL) {
-            DBusMessage *reply;
-
-            reply = dbus.connection_send_with_reply_and_block(conn, msg, 300, NULL);
-            if (reply) {
-                if (!dbus.message_get_args(reply, NULL,
-                                           DBUS_TYPE_UINT32, &screensaver_cookie,
-                                           DBUS_TYPE_INVALID))
-                    screensaver_cookie = 0;
-                dbus.message_unref(reply);
-            }
-
-            dbus.message_unref(msg);
-        }
-
-        if (screensaver_cookie == 0) {
-            return SDL_FALSE;
-        }
+    if ( (inhibit && (screensaver_cookie != 0)) || (!inhibit && (screensaver_cookie == 0)) ) {
         return SDL_TRUE;
     } else {
-        DBusMessage *msg = dbus.message_new_method_call("org.freedesktop.ScreenSaver",
-                                                        "/org/freedesktop/ScreenSaver",
-                                                        "org.freedesktop.ScreenSaver",
-                                                        "UnInhibit");
-        dbus.message_append_args (msg,
-                                  DBUS_TYPE_UINT32, &screensaver_cookie,
-                                  DBUS_TYPE_INVALID);
-        if (msg != NULL) {
-            if (dbus.connection_send(conn, msg, NULL)) {
-                dbus.connection_flush(conn);
-            }
-            dbus.message_unref(msg);
-        }
+        const char *node = "org.freedesktop.ScreenSaver";
+        const char *path = "/org/freedesktop/ScreenSaver";
+        const char *interface = "org.freedesktop.ScreenSaver";
 
-        screensaver_cookie = 0;
-        return SDL_TRUE;
+        if (inhibit) {
+            const char *app = "My SDL application";
+            const char *reason = "Playing a game";
+            if (!SDL_DBus_CallMethod(node, path, interface, "Inhibit",
+                    DBUS_TYPE_STRING, &app, DBUS_TYPE_STRING, &reason, DBUS_TYPE_INVALID,
+                    DBUS_TYPE_UINT32, &screensaver_cookie, DBUS_TYPE_INVALID)) {
+                return SDL_FALSE;
+            }
+            return (screensaver_cookie != 0) ? SDL_TRUE : SDL_FALSE;
+        } else {
+            if (!SDL_DBus_CallVoidMethod(node, path, interface, "UnInhibit", DBUS_TYPE_UINT32, &screensaver_cookie, DBUS_TYPE_INVALID)) {
+                return SDL_FALSE;
+            }
+            screensaver_cookie = 0;
+        }
     }
+
+    return SDL_TRUE;
 }
 #endif
+
+/* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/core/linux/SDL_dbus.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -21,8 +21,8 @@
 
 #include "../../SDL_internal.h"
 
-#ifndef _SDL_dbus_h
-#define _SDL_dbus_h
+#ifndef SDL_dbus_h_
+#define SDL_dbus_h_
 
 #ifdef HAVE_DBUS_DBUS_H
 #define SDL_USE_LIBDBUS 1
@@ -32,6 +32,7 @@
 
 typedef struct SDL_DBusContext {
     DBusConnection *session_conn;
+    DBusConnection *system_conn;
 
     DBusConnection *(*bus_get_private)(DBusBusType, DBusError *);
     dbus_bool_t (*bus_register)(DBusConnection *, DBusError *);
@@ -53,7 +54,9 @@ typedef struct SDL_DBusContext {
     dbus_bool_t (*message_is_signal)(DBusMessage *, const char *, const char *); 	
     DBusMessage *(*message_new_method_call)(const char *, const char *, const char *, const char *);
     dbus_bool_t (*message_append_args)(DBusMessage *, int, ...);
+    dbus_bool_t (*message_append_args_valist)(DBusMessage *, int, va_list);
     dbus_bool_t (*message_get_args)(DBusMessage *, DBusError *, int, ...);
+    dbus_bool_t (*message_get_args_valist)(DBusMessage *, DBusError *, int, va_list);
     dbus_bool_t (*message_iter_init)(DBusMessage *, DBusMessageIter *);
     dbus_bool_t (*message_iter_next)(DBusMessageIter *);
     void (*message_iter_get_basic)(DBusMessageIter *, void *);
@@ -65,6 +68,7 @@ typedef struct SDL_DBusContext {
     void (*error_free)(DBusError *);
     char *(*get_local_machine_id)(void);
     void (*free)(void *);
+    void (*free_string_array)(char **);
     void (*shutdown)(void);
 
 } SDL_DBusContext;
@@ -72,11 +76,22 @@ typedef struct SDL_DBusContext {
 extern void SDL_DBus_Init(void);
 extern void SDL_DBus_Quit(void);
 extern SDL_DBusContext * SDL_DBus_GetContext(void);
+
+/* These use the built-in Session connection. */
+extern SDL_bool SDL_DBus_CallMethod(const char *node, const char *path, const char *interface, const char *method, ...);
+extern SDL_bool SDL_DBus_CallVoidMethod(const char *node, const char *path, const char *interface, const char *method, ...);
+extern SDL_bool SDL_DBus_QueryProperty(const char *node, const char *path, const char *interface, const char *property, const int expectedtype, void *result);
+
+/* These use whatever connection you like. */
+extern SDL_bool SDL_DBus_CallMethodOnConnection(DBusConnection *conn, const char *node, const char *path, const char *interface, const char *method, ...);
+extern SDL_bool SDL_DBus_CallVoidMethodOnConnection(DBusConnection *conn, const char *node, const char *path, const char *interface, const char *method, ...);
+extern SDL_bool SDL_DBus_QueryPropertyOnConnection(DBusConnection *conn, const char *node, const char *path, const char *interface, const char *property, const int expectedtype, void *result);
+
 extern void SDL_DBus_ScreensaverTickle(void);
 extern SDL_bool SDL_DBus_ScreensaverInhibit(SDL_bool inhibit);
 
 #endif /* HAVE_DBUS_DBUS_H */
 
-#endif /* _SDL_dbus_h */
+#endif /* SDL_dbus_h_ */
 
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/core/linux/SDL_evdev.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -30,51 +30,51 @@
  */
 
 #include "SDL_evdev.h"
+#include "SDL_evdev_kbd.h"
 
 #include <sys/stat.h>
 #include <unistd.h>
 #include <fcntl.h>
 #include <sys/ioctl.h>
-#include <limits.h>             /* For the definition of PATH_MAX */
 #include <linux/input.h>
-#ifdef SDL_INPUT_LINUXKD
-#include <linux/kd.h>
-#include <linux/keyboard.h>
-#include <linux/vt.h>
-#include <linux/tiocl.h> /* for TIOCL_GETSHIFTSTATE */
-#endif
 
 #include "SDL.h"
 #include "SDL_assert.h"
 #include "SDL_endian.h"
-#include "../../core/linux/SDL_udev.h"
 #include "SDL_scancode.h"
 #include "../../events/SDL_events_c.h"
 #include "../../events/scancodes_linux.h" /* adds linux_scancode_table */
+#include "../../core/linux/SDL_udev.h"
 
-/* This isn't defined in older Linux kernel headers */
+/* These are not defined in older Linux kernel headers */
 #ifndef SYN_DROPPED
 #define SYN_DROPPED 3
 #endif
+#ifndef ABS_MT_SLOT
+#define ABS_MT_SLOT         0x2f
+#define ABS_MT_POSITION_X   0x35
+#define ABS_MT_POSITION_Y   0x36
+#define ABS_MT_TRACKING_ID  0x39
+#endif
 
 typedef struct SDL_evdevlist_item
 {
     char *path;
     int fd;
-    
+
     /* TODO: use this for every device, not just touchscreen */
     int out_of_sync;
-    
+
     /* TODO: expand on this to have data for every possible class (mouse,
        keyboard, touchpad, etc.). Also there's probably some things in here we
        can pull out to the SDL_evdevlist_item i.e. name */
     int is_touchscreen;
     struct {
         char* name;
-        
+
         int min_x, max_x, range_x;
         int min_y, max_y, range_y;
-        
+
         int max_slots;
         int current_slot;
         struct {
@@ -88,18 +88,17 @@ typedef struct SDL_evdevlist_item
             int x, y;
         } * slots;
     } * touchscreen_data;
-    
+
     struct SDL_evdevlist_item *next;
 } SDL_evdevlist_item;
 
 typedef struct SDL_EVDEV_PrivateData
 {
+    int ref_count;
+    int num_devices;
     SDL_evdevlist_item *first;
     SDL_evdevlist_item *last;
-    int num_devices;
-    int ref_count;
-    int console_fd;
-    int kb_mode;
+    SDL_EVDEV_keyboard_state *kbd;
 } SDL_EVDEV_PrivateData;
 
 #define _THIS SDL_EVDEV_PrivateData *_this
@@ -111,7 +110,7 @@ static int SDL_EVDEV_device_removed(const char *dev_path);
 
 #if SDL_USE_LIBUDEV
 static int SDL_EVDEV_device_added(const char *dev_path, int udev_class);
-void SDL_EVDEV_udev_callback(SDL_UDEV_deviceevent udev_type, int udev_class,
+static void SDL_EVDEV_udev_callback(SDL_UDEV_deviceevent udev_type, int udev_class,
     const char *dev_path);
 #endif /* SDL_USE_LIBUDEV */
 
@@ -126,93 +125,6 @@ static Uint8 EVDEV_MouseButtons[] = {
     SDL_BUTTON_X2 + 3           /*  BTN_TASK        0x117 */
 };
 
-static const char* EVDEV_consoles[] = {
-    /* "/proc/self/fd/0",
-    "/dev/tty",
-    "/dev/tty0", */ /* the tty ioctl's prohibit these */
-    "/dev/tty1",
-    "/dev/tty2",
-    "/dev/tty3",
-    "/dev/tty4",
-    "/dev/tty5",
-    "/dev/tty6",
-    "/dev/tty7", /* usually X is spawned in tty7 */
-    "/dev/vc/0",
-    "/dev/console"
-};
-
-static int SDL_EVDEV_is_console(int fd) {
-    int type;
-    
-    return isatty(fd) && ioctl(fd, KDGKBTYPE, &type) == 0 &&
-        (type == KB_101 || type == KB_84);
-}
-
-/* Prevent keystrokes from reaching the tty */
-static int SDL_EVDEV_mute_keyboard(int tty_fd, int* old_kb_mode)
-{
-    if (!SDL_EVDEV_is_console(tty_fd)) {
-        return SDL_SetError("Tried to mute an invalid tty");
-    }
-    
-    if (ioctl(tty_fd, KDGKBMODE, old_kb_mode) < 0) {
-        return SDL_SetError("Failed to get keyboard mode during muting");
-    }
-    
-    /* FIXME: atm this absolutely ruins the vt, and KDSKBMUTE isn't implemented
-       in the kernel */
-    /*
-    if (ioctl(tty_fd, KDSKBMODE, K_OFF) < 0) {
-        return SDL_SetError("Failed to set keyboard mode during muting");
-    }
-    */
-    
-    return 0;  
-}
-
-/* Restore the keyboard mode for given tty */
-static void SDL_EVDEV_unmute_keyboard(int tty_fd, int kb_mode)
-{
-    /* read above */
-    /*
-    if (ioctl(tty_fd, KDSKBMODE, kb_mode) < 0) {
-        SDL_Log("Failed to unmute keyboard");
-    }
-    */
-}
-
-static int SDL_EVDEV_get_active_tty()
-{  
-    int i, fd, ret, tty = 0;
-    char tiocl;
-    struct vt_stat vt_state;
-    char path[PATH_MAX + 1];
-    
-    for(i = 0; i < SDL_arraysize(EVDEV_consoles); i++) {
-        fd = open(EVDEV_consoles[i], O_RDONLY);
-        
-        if (fd < 0 && !SDL_EVDEV_is_console(fd))
-            break;
-        
-        tiocl = TIOCL_GETFGCONSOLE;
-        if ((ret = ioctl(fd, TIOCLINUX, &tiocl)) >= 0)
-            tty = ret + 1;
-        else if (ioctl(fd, VT_GETSTATE, &vt_state) == 0)
-            tty = vt_state.v_active;
-        
-        close(fd);
-        
-        if (tty) {
-            sprintf(path, "/dev/tty%u", tty);
-            fd = open(path, O_RDONLY);
-            if (fd >= 0 && SDL_EVDEV_is_console(fd))
-                return fd;
-        }
-    }
-    
-    return SDL_SetError("Failed to determine active tty");
-}
-
 int
 SDL_EVDEV_Init(void)
 {
@@ -236,24 +148,18 @@ SDL_EVDEV_Init(void)
             _this = NULL;
             return -1;
         }
-        
+
         /* Force a scan to build the initial device list */
         SDL_UDEV_Scan();
 #else
         /* TODO: Scan the devices manually, like a caveman */
 #endif /* SDL_USE_LIBUDEV */
-        
-        /* We need a physical terminal (not PTS) to be able to translate key
-           code to symbols via the kernel tables */
-        _this->console_fd = SDL_EVDEV_get_active_tty();
-        
-        /* Mute the keyboard so keystrokes only generate evdev events and do not
-           leak through to the console */
-        SDL_EVDEV_mute_keyboard(_this->console_fd, &_this->kb_mode);
+
+        _this->kbd = SDL_EVDEV_kbd_init();
     }
-    
+
     _this->ref_count += 1;
-    
+
     return 0;
 }
 
@@ -263,42 +169,39 @@ SDL_EVDEV_Quit(void)
     if (_this == NULL) {
         return;
     }
-    
+
     _this->ref_count -= 1;
-    
+
     if (_this->ref_count < 1) {
 #if SDL_USE_LIBUDEV
         SDL_UDEV_DelCallback(SDL_EVDEV_udev_callback);
         SDL_UDEV_Quit();
 #endif /* SDL_USE_LIBUDEV */
-       
-        if (_this->console_fd >= 0) {
-            SDL_EVDEV_unmute_keyboard(_this->console_fd, _this->kb_mode);
-            close(_this->console_fd);
-        }
-        
+
+        SDL_EVDEV_kbd_quit(_this->kbd);
+
         /* Remove existing devices */
         while(_this->first != NULL) {
             SDL_EVDEV_device_removed(_this->first->path);
         }
-        
+
         SDL_assert(_this->first == NULL);
         SDL_assert(_this->last == NULL);
         SDL_assert(_this->num_devices == 0);
-        
+
         SDL_free(_this);
         _this = NULL;
     }
 }
 
 #if SDL_USE_LIBUDEV
-void SDL_EVDEV_udev_callback(SDL_UDEV_deviceevent udev_event, int udev_class,
+static void SDL_EVDEV_udev_callback(SDL_UDEV_deviceevent udev_event, int udev_class,
     const char* dev_path)
 {
     if (dev_path == NULL) {
         return;
     }
-    
+
     switch(udev_event) {
     case SDL_UDEV_DEVICEADDED:
         if (!(udev_class & (SDL_UDEV_DEVICE_MOUSE | SDL_UDEV_DEVICE_KEYBOARD |
@@ -316,82 +219,6 @@ void SDL_EVDEV_udev_callback(SDL_UDEV_deviceevent udev_event, int udev_class,
 }
 #endif /* SDL_USE_LIBUDEV */
 
-#ifdef SDL_INPUT_LINUXKD
-/* this logic is pulled from kbd_keycode() in drivers/tty/vt/keyboard.c in the
-   Linux kernel source */
-static void SDL_EVDEV_do_text_input(unsigned short keycode) {
-    char shift_state;
-    int locks_state;
-    struct kbentry kbe;
-    unsigned char type;
-    char text[2] = { 0 };
-    
-    if (_this->console_fd < 0)
-        return;
-    
-    shift_state = TIOCL_GETSHIFTSTATE;
-    if (ioctl(_this->console_fd, TIOCLINUX, &shift_state) < 0) {
-        /* TODO: error */
-        return;
-    }
-
-    kbe.kb_table = shift_state;
-    kbe.kb_index = keycode;
-    
-    if (ioctl(_this->console_fd, KDGKBENT, &kbe) < 0) {
-        /* TODO: error */
-        return;
-    }
-    
-    type = KTYP(kbe.kb_value);
-    
-    if (type < 0xf0) {
-        /* 
-         * FIXME: keysyms with a type below 0xf0 represent a unicode character
-         * which requires special handling due to dead characters, diacritics,
-         * etc. For perfect input a proper way to deal with such characters
-         * should be implemented.
-         *
-         * For reference, the only place I was able to find out about this
-         * special 0xf0 value was in an unused? couple of patches listed below.
-         *
-         * http://ftp.tc.edu.tw/pub/docs/Unicode/utf8/linux-2.3.12-keyboard.diff
-         * http://ftp.tc.edu.tw/pub/docs/Unicode/utf8/linux-2.3.12-console.diff
-         */
-        
-        return;
-    }
-    
-    type -= 0xf0;
-    
-    /* if type is KT_LETTER then it can be affected by Caps Lock */
-    if (type == KT_LETTER) {
-        type = KT_LATIN;
-    
-        if (ioctl(_this->console_fd, KDGKBLED, &locks_state) < 0) {
-            /* TODO: error */
-            return;
-        }
-        
-        if (locks_state & K_CAPSLOCK) {
-            kbe.kb_table = shift_state ^ (1 << KG_SHIFT);
-            
-            if (ioctl(_this->console_fd, KDGKBENT, &kbe) < 0) {
-                /* TODO: error */
-                return;
-            }
-        }
-    }
-    
-    /* TODO: convert values >= 0x80 from ISO-8859-1? to UTF-8 */
-    if (type != KT_LATIN || KVAL(kbe.kb_value) >= 0x80)
-        return;
-    
-    *text = KVAL(kbe.kb_value);
-    SDL_SendKeyboardText(text);
-}
-#endif /* SDL_INPUT_LINUXKD */
-
 void 
 SDL_EVDEV_Poll(void)
 {
@@ -423,7 +250,7 @@ SDL_EVDEV_Poll(void)
                     events[i].type == EV_SYN && events[i].code != SYN_REPORT) {
                     break;
                 }
-                
+
                 switch (events[i].type) {
                 case EV_KEY:
                     if (events[i].code >= BTN_MOUSE && events[i].code < BTN_MOUSE + SDL_arraysize(EVDEV_MouseButtons)) {
@@ -443,11 +270,9 @@ SDL_EVDEV_Poll(void)
                             SDL_SendKeyboardKey(SDL_RELEASED, scan_code);
                         } else if (events[i].value == 1 || events[i].value == 2 /* key repeated */) {
                             SDL_SendKeyboardKey(SDL_PRESSED, scan_code);
-#ifdef SDL_INPUT_LINUXKD
-                            SDL_EVDEV_do_text_input(events[i].code);
-#endif /* SDL_INPUT_LINUXKD */
                         }
                     }
+                    SDL_EVDEV_kbd_keycode(_this->kbd, events[i].code, events[i].value);
                     break;
                 case EV_ABS:
                     switch(events[i].code) {
@@ -519,13 +344,13 @@ SDL_EVDEV_Poll(void)
                     case SYN_REPORT:
                         if (!item->is_touchscreen) /* FIXME: temp hack */
                             break;
-                            
+
                         for(j = 0; j < item->touchscreen_data->max_slots; j++) {
                             norm_x = (float)(item->touchscreen_data->slots[j].x - item->touchscreen_data->min_x) /
                                 (float)item->touchscreen_data->range_x;
                             norm_y = (float)(item->touchscreen_data->slots[j].y - item->touchscreen_data->min_y) /
                                 (float)item->touchscreen_data->range_y;
-                        
+
                             switch(item->touchscreen_data->slots[j].delta) {
                             case EVDEV_TOUCH_SLOTDELTA_DOWN:
                                 SDL_SendTouch(item->fd, item->touchscreen_data->slots[j].tracking_id, SDL_TRUE, norm_x, norm_y, 1.0f);
@@ -544,7 +369,7 @@ SDL_EVDEV_Poll(void)
                                 break;
                             }
                         }
-                        
+
                         if (item->out_of_sync)
                             item->out_of_sync = 0;
                         break;
@@ -573,8 +398,8 @@ SDL_EVDEV_translate_keycode(int keycode)
 
     if (scancode == SDL_SCANCODE_UNKNOWN) {
         SDL_Log("The key you just pressed is not recognized by SDL. To help "
-            "get this fixed, please report this to the SDL mailing list "
-            "<sdl@libsdl.org> EVDEV KeyCode %d\n", keycode);
+            "get this fixed, please report this to the SDL forums/mailing list "
+            "<https://discourse.libsdl.org/> EVDEV KeyCode %d", keycode);
     }
 
     return scancode;
@@ -587,26 +412,26 @@ SDL_EVDEV_init_touchscreen(SDL_evdevlist_item* item)
     int ret, i;
     char name[64];
     struct input_absinfo abs_info;
-    
+
     if (!item->is_touchscreen)
         return 0;
-    
+
     item->touchscreen_data = SDL_calloc(1, sizeof(*item->touchscreen_data));
     if (item->touchscreen_data == NULL)
         return SDL_OutOfMemory();
-    
+
     ret = ioctl(item->fd, EVIOCGNAME(sizeof(name)), name);
     if (ret < 0) {
         SDL_free(item->touchscreen_data);
         return SDL_SetError("Failed to get evdev touchscreen name");
     }
-    
+
     item->touchscreen_data->name = SDL_strdup(name);
     if (item->touchscreen_data->name == NULL) {
         SDL_free(item->touchscreen_data);
         return SDL_OutOfMemory();
     }
-    
+
     ret = ioctl(item->fd, EVIOCGABS(ABS_MT_POSITION_X), &abs_info);
     if (ret < 0) {
         SDL_free(item->touchscreen_data->name);
@@ -616,7 +441,7 @@ SDL_EVDEV_init_touchscreen(SDL_evdevlist_item* item)
     item->touchscreen_data->min_x = abs_info.minimum;
     item->touchscreen_data->max_x = abs_info.maximum;
     item->touchscreen_data->range_x = abs_info.maximum - abs_info.minimum;
-        
+
     ret = ioctl(item->fd, EVIOCGABS(ABS_MT_POSITION_Y), &abs_info);
     if (ret < 0) {
         SDL_free(item->touchscreen_data->name);
@@ -626,7 +451,7 @@ SDL_EVDEV_init_touchscreen(SDL_evdevlist_item* item)
     item->touchscreen_data->min_y = abs_info.minimum;
     item->touchscreen_data->max_y = abs_info.maximum;
     item->touchscreen_data->range_y = abs_info.maximum - abs_info.minimum;
-    
+
     ret = ioctl(item->fd, EVIOCGABS(ABS_MT_SLOT), &abs_info);
     if (ret < 0) {
         SDL_free(item->touchscreen_data->name);
@@ -634,7 +459,7 @@ SDL_EVDEV_init_touchscreen(SDL_evdevlist_item* item)
         return SDL_SetError("Failed to get evdev touchscreen limits");
     }
     item->touchscreen_data->max_slots = abs_info.maximum + 1;
-    
+
     item->touchscreen_data->slots = SDL_calloc(
         item->touchscreen_data->max_slots,
         sizeof(*item->touchscreen_data->slots));
@@ -643,11 +468,11 @@ SDL_EVDEV_init_touchscreen(SDL_evdevlist_item* item)
         SDL_free(item->touchscreen_data);
         return SDL_OutOfMemory();
     }
-    
+
     for(i = 0; i < item->touchscreen_data->max_slots; i++) {
         item->touchscreen_data->slots[i].tracking_id = -1;
     }
-    
+
     ret = SDL_AddTouch(item->fd, /* I guess our fd is unique enough */
         item->touchscreen_data->name);
     if (ret < 0) {
@@ -656,7 +481,7 @@ SDL_EVDEV_init_touchscreen(SDL_evdevlist_item* item)
         SDL_free(item->touchscreen_data);
         return ret;
     }
-    
+
     return 0;
 }
 #endif /* SDL_USE_LIBUDEV */
@@ -665,7 +490,7 @@ static void
 SDL_EVDEV_destroy_touchscreen(SDL_evdevlist_item* item) {
     if (!item->is_touchscreen)
         return;
-    
+
     SDL_DelTouch(item->fd);
     SDL_free(item->touchscreen_data->slots);
     SDL_free(item->touchscreen_data->name);
@@ -689,21 +514,21 @@ SDL_EVDEV_sync_device(SDL_evdevlist_item *item)
     __u32* mt_req_code;
     __s32* mt_req_values;
     size_t mt_req_size;
-    
+
     /* TODO: sync devices other than touchscreen */
     if (!item->is_touchscreen)
         return;
-    
+
     mt_req_size = sizeof(*mt_req_code) +
         sizeof(*mt_req_values) * item->touchscreen_data->max_slots;
-    
+
     mt_req_code = SDL_calloc(1, mt_req_size);
     if (mt_req_code == NULL) {
         return;
     }
-    
+
     mt_req_values = (__s32*)mt_req_code + 1;
-    
+
     *mt_req_code = ABS_MT_TRACKING_ID;
     ret = ioctl(item->fd, EVIOCGMTSLOTS(mt_req_size), mt_req_code);
     if (ret < 0) {
@@ -730,7 +555,7 @@ SDL_EVDEV_sync_device(SDL_evdevlist_item *item)
             item->touchscreen_data->slots[i].delta = EVDEV_TOUCH_SLOTDELTA_UP;
         }
     }
-    
+
     *mt_req_code = ABS_MT_POSITION_X;
     ret = ioctl(item->fd, EVIOCGMTSLOTS(mt_req_size), mt_req_code);
     if (ret < 0) {
@@ -748,7 +573,7 @@ SDL_EVDEV_sync_device(SDL_evdevlist_item *item)
             }
         }
     }
-    
+
     *mt_req_code = ABS_MT_POSITION_Y;
     ret = ioctl(item->fd, EVIOCGMTSLOTS(mt_req_size), mt_req_code);
     if (ret < 0) {
@@ -766,14 +591,14 @@ SDL_EVDEV_sync_device(SDL_evdevlist_item *item)
             }
         }
     }
-    
+
     ret = ioctl(item->fd, EVIOCGABS(ABS_MT_SLOT), &abs_info);
     if (ret < 0) {
         SDL_free(mt_req_code);
         return;
     }
     item->touchscreen_data->current_slot = abs_info.value;
-    
+
     SDL_free(mt_req_code);
 
 #endif /* EVIOCGMTSLOTS */
@@ -792,7 +617,7 @@ SDL_EVDEV_device_added(const char *dev_path, int udev_class)
             return -1;  /* already have this one */
         }
     }
-    
+
     item = (SDL_evdevlist_item *) SDL_calloc(1, sizeof (SDL_evdevlist_item));
     if (item == NULL) {
         return SDL_OutOfMemory();
@@ -803,33 +628,33 @@ SDL_EVDEV_device_added(const char *dev_path, int udev_class)
         SDL_free(item);
         return SDL_SetError("Unable to open %s", dev_path);
     }
-    
+
     item->path = SDL_strdup(dev_path);
     if (item->path == NULL) {
         close(item->fd);
         SDL_free(item);
         return SDL_OutOfMemory();
     }
-    
+
     if (udev_class & SDL_UDEV_DEVICE_TOUCHSCREEN) {
         item->is_touchscreen = 1;
-        
+
         if ((ret = SDL_EVDEV_init_touchscreen(item)) < 0) {
             close(item->fd);
             SDL_free(item);
             return ret;
         }
     }
-    
+
     if (_this->last == NULL) {
         _this->first = _this->last = item;
     } else {
         _this->last->next = item;
         _this->last = item;
     }
-    
+
     SDL_EVDEV_sync_device(item);
-    
+
     return _this->num_devices++;
 }
 #endif /* SDL_USE_LIBUDEV */

Engine/lib/sdl/src/core/linux/SDL_evdev.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -21,8 +21,8 @@
 
 #include "../../SDL_internal.h"
 
-#ifndef _SDL_evdev_h
-#define _SDL_evdev_h
+#ifndef SDL_evdev_h_
+#define SDL_evdev_h_
 
 #ifdef SDL_INPUT_LINUXEV
 
@@ -34,6 +34,6 @@ extern void SDL_EVDEV_Poll(void);
 
 #endif /* SDL_INPUT_LINUXEV */
 
-#endif /* _SDL_evdev_h */
+#endif /* SDL_evdev_h_ */
 
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/core/linux/SDL_evdev_kbd.c

@@ -0,0 +1,677 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "../../SDL_internal.h"
+
+#include "SDL_evdev_kbd.h"
+
+#ifdef SDL_INPUT_LINUXKD
+
+/* This logic is adapted from drivers/tty/vt/keyboard.c in the Linux kernel source */
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <linux/kd.h>
+#include <linux/keyboard.h>
+#include <linux/vt.h>
+#include <linux/tiocl.h> /* for TIOCL_GETSHIFTSTATE */
+
+#include "../../events/SDL_events_c.h"
+#include "SDL_evdev_kbd_default_accents.h"
+#include "SDL_evdev_kbd_default_keymap.h"
+
+/* These are not defined in older Linux kernel headers */
+#ifndef K_UNICODE
+#define K_UNICODE 0x03
+#endif
+#ifndef K_OFF
+#define K_OFF 0x04
+#endif
+
+/*
+ * Handler Tables.
+ */
+
+#define K_HANDLERS\
+    k_self,     k_fn,       k_spec,       k_pad,\
+    k_dead,     k_cons,     k_cur,        k_shift,\
+    k_meta,     k_ascii,    k_lock,       k_lowercase,\
+    k_slock,    k_dead2,    k_brl,        k_ignore
+
+typedef void (k_handler_fn)(SDL_EVDEV_keyboard_state *kbd, unsigned char value, char up_flag);
+static k_handler_fn K_HANDLERS;
+static k_handler_fn *k_handler[16] = { K_HANDLERS };
+
+typedef void (fn_handler_fn)(SDL_EVDEV_keyboard_state *kbd);
+static void fn_enter(SDL_EVDEV_keyboard_state *kbd);
+static void fn_caps_toggle(SDL_EVDEV_keyboard_state *kbd);
+static void fn_caps_on(SDL_EVDEV_keyboard_state *kbd);
+static void fn_num(SDL_EVDEV_keyboard_state *kbd);
+static void fn_compose(SDL_EVDEV_keyboard_state *kbd);
+
+static fn_handler_fn *fn_handler[] =
+{
+    NULL,       fn_enter,   NULL,       NULL,
+    NULL,       NULL,       NULL,       fn_caps_toggle,
+    fn_num,     NULL,       NULL,       NULL,
+    NULL,       fn_caps_on, fn_compose, NULL,
+    NULL,       NULL,       NULL,       fn_num
+};
+
+
+/*
+ * Keyboard State
+ */
+
+struct SDL_EVDEV_keyboard_state
+{
+    int console_fd;
+    int old_kbd_mode;
+    unsigned short **key_maps;
+    unsigned char shift_down[NR_SHIFT];        /* shift state counters.. */
+    SDL_bool dead_key_next;
+    int npadch;                    /* -1 or number assembled on pad */
+    struct kbdiacrs *accents;
+    unsigned int diacr;
+    SDL_bool rep;                    /* flag telling character repeat */
+    unsigned char lockstate;
+    unsigned char slockstate;
+    unsigned char ledflagstate;
+    char shift_state;
+    char text[128];
+    unsigned int text_len;
+};
+
+#ifdef DUMP_ACCENTS
+static void SDL_EVDEV_dump_accents(SDL_EVDEV_keyboard_state *kbd)
+{
+    unsigned int i;
+
+    printf("static struct kbdiacrs default_accents = {\n");
+    printf("    %d,\n", kbd->accents->kb_cnt);
+    printf("    {\n");
+    for (i = 0; i < kbd->accents->kb_cnt; ++i) {
+        struct kbdiacr *diacr = &kbd->accents->kbdiacr[i];
+        printf("        { 0x%.2x, 0x%.2x, 0x%.2x },\n",
+            diacr->diacr, diacr->base, diacr->result);
+    }
+    while (i < 256) {
+        printf("        { 0x00, 0x00, 0x00 },\n");
+        ++i;
+    }
+    printf("    }\n");
+    printf("};\n");
+}
+#endif /* DUMP_ACCENTS */
+
+#ifdef DUMP_KEYMAP
+static void SDL_EVDEV_dump_keymap(SDL_EVDEV_keyboard_state *kbd)
+{
+    int i, j;
+
+    for (i = 0; i < MAX_NR_KEYMAPS; ++i) {
+        if (kbd->key_maps[i]) {
+            printf("static unsigned short default_key_map_%d[NR_KEYS] = {", i);
+            for (j = 0; j < NR_KEYS; ++j) {
+                if ((j%8) == 0) {
+                    printf("\n    ");
+                }
+                printf("0x%.4x, ", kbd->key_maps[i][j]);
+            }
+            printf("\n};\n");
+        }
+    }
+    printf("\n");
+    printf("static unsigned short *default_key_maps[MAX_NR_KEYMAPS] = {\n");
+    for (i = 0; i < MAX_NR_KEYMAPS; ++i) {
+        if (kbd->key_maps[i]) {
+            printf("    default_key_map_%d,\n", i);
+        } else {
+            printf("    NULL,\n");
+        }
+    }
+    printf("};\n");
+}
+#endif /* DUMP_KEYMAP */
+
+static int SDL_EVDEV_kbd_load_keymaps(SDL_EVDEV_keyboard_state *kbd)
+{
+    int i, j;
+
+    kbd->key_maps = (unsigned short **)SDL_calloc(MAX_NR_KEYMAPS, sizeof(unsigned short *));
+    if (!kbd->key_maps) {
+        return -1;
+    }
+
+    for (i = 0; i < MAX_NR_KEYMAPS; ++i) {
+        struct kbentry kbe;
+
+        kbe.kb_table = i;
+        kbe.kb_index = 0;
+        if (ioctl(kbd->console_fd, KDGKBENT, &kbe) < 0) {
+            return -1;
+        }
+
+        if (kbe.kb_value == K_NOSUCHMAP) {
+            continue;
+        }
+
+        kbd->key_maps[i] = (unsigned short *)SDL_malloc(NR_KEYS * sizeof(unsigned short));
+        if (!kbd->key_maps[i]) {
+            return -1;
+        }
+
+        for (j = 0; j < NR_KEYS; ++j) {
+            kbe.kb_table = i;
+            kbe.kb_index = j;
+            if (ioctl(kbd->console_fd, KDGKBENT, &kbe) < 0) {
+                return -1;
+            }
+            kbd->key_maps[i][j] = (kbe.kb_value ^ 0xf000);
+        }
+    }
+    return 0;
+}
+
+SDL_EVDEV_keyboard_state *
+SDL_EVDEV_kbd_init(void)
+{
+    SDL_EVDEV_keyboard_state *kbd;
+    int i;
+    char flag_state;
+    char shift_state[2] = {TIOCL_GETSHIFTSTATE, 0};
+
+    kbd = (SDL_EVDEV_keyboard_state *)SDL_calloc(1, sizeof(*kbd));
+    if (!kbd) {
+        return NULL;
+    }
+
+    kbd->npadch = -1;
+
+    /* This might fail if we're not connected to a tty (e.g. on the Steam Link) */
+    kbd->console_fd = open("/dev/tty", O_RDONLY);
+
+    if (ioctl(kbd->console_fd, TIOCLINUX, shift_state) == 0) {
+        kbd->shift_state = *shift_state;
+    }
+
+    if (ioctl(kbd->console_fd, KDGKBLED, &flag_state) == 0) {
+        kbd->ledflagstate = flag_state;
+    }
+
+    kbd->accents = &default_accents;
+    if (ioctl(kbd->console_fd, KDGKBDIACR, kbd->accents) < 0) {
+        /* No worries, we'll use the default accent table */
+    }
+
+    kbd->key_maps = default_key_maps;
+    if (ioctl(kbd->console_fd, KDGKBMODE, &kbd->old_kbd_mode) == 0) {
+        /* Set the keyboard in UNICODE mode and load the keymaps */
+        ioctl(kbd->console_fd, KDSKBMODE, K_UNICODE);
+
+        if (SDL_EVDEV_kbd_load_keymaps(kbd) < 0) {
+            for (i = 0; i < MAX_NR_KEYMAPS; ++i) {
+                if (kbd->key_maps[i]) {
+                    SDL_free(kbd->key_maps[i]);
+                }
+            }
+            SDL_free(kbd->key_maps);
+
+            kbd->key_maps = default_key_maps;
+        }
+
+        /* Mute the keyboard so keystrokes only generate evdev events
+         * and do not leak through to the console
+         */
+        ioctl(kbd->console_fd, KDSKBMODE, K_OFF);
+    }
+
+#ifdef DUMP_ACCENTS
+    SDL_EVDEV_dump_accents(kbd);
+#endif
+#ifdef DUMP_KEYMAP
+    SDL_EVDEV_dump_keymap(kbd);
+#endif
+    return kbd;
+}
+
+void
+SDL_EVDEV_kbd_quit(SDL_EVDEV_keyboard_state *kbd)
+{
+    if (!kbd) {
+        return;
+    }
+
+    if (kbd->console_fd >= 0) {
+        /* Restore the original keyboard mode */
+        ioctl(kbd->console_fd, KDSKBMODE, kbd->old_kbd_mode);
+
+        close(kbd->console_fd);
+        kbd->console_fd = -1;
+    }
+
+    if (kbd->key_maps && kbd->key_maps != default_key_maps) {
+        int i;
+        for (i = 0; i < MAX_NR_KEYMAPS; ++i) {
+            if (kbd->key_maps[i]) {
+                SDL_free(kbd->key_maps[i]);
+            }
+        }
+        SDL_free(kbd->key_maps);
+    }
+
+    SDL_free(kbd);
+}
+
+/*
+ * Helper Functions.
+ */
+static void put_queue(SDL_EVDEV_keyboard_state *kbd, uint c)
+{
+    /* c is already part of a UTF-8 sequence and safe to add as a character */
+    if (kbd->text_len < (sizeof(kbd->text)-1)) {
+        kbd->text[kbd->text_len++] = (char)c;
+    }
+}
+
+static void put_utf8(SDL_EVDEV_keyboard_state *kbd, uint c)
+{
+    if (c < 0x80)
+        /*  0******* */
+        put_queue(kbd, c);
+    else if (c < 0x800) {
+        /* 110***** 10****** */
+        put_queue(kbd, 0xc0 | (c >> 6));
+        put_queue(kbd, 0x80 | (c & 0x3f));
+    } else if (c < 0x10000) {
+        if (c >= 0xD800 && c < 0xE000)
+            return;
+        if (c == 0xFFFF)
+            return;
+        /* 1110**** 10****** 10****** */
+        put_queue(kbd, 0xe0 | (c >> 12));
+        put_queue(kbd, 0x80 | ((c >> 6) & 0x3f));
+        put_queue(kbd, 0x80 | (c & 0x3f));
+    } else if (c < 0x110000) {
+        /* 11110*** 10****** 10****** 10****** */
+        put_queue(kbd, 0xf0 | (c >> 18));
+        put_queue(kbd, 0x80 | ((c >> 12) & 0x3f));
+        put_queue(kbd, 0x80 | ((c >> 6) & 0x3f));
+        put_queue(kbd, 0x80 | (c & 0x3f));
+    }
+}
+
+/*
+ * We have a combining character DIACR here, followed by the character CH.
+ * If the combination occurs in the table, return the corresponding value.
+ * Otherwise, if CH is a space or equals DIACR, return DIACR.
+ * Otherwise, conclude that DIACR was not combining after all,
+ * queue it and return CH.
+ */
+static unsigned int handle_diacr(SDL_EVDEV_keyboard_state *kbd, unsigned int ch)
+{
+    unsigned int d = kbd->diacr;
+    unsigned int i;
+
+    kbd->diacr = 0;
+
+    for (i = 0; i < kbd->accents->kb_cnt; i++) {
+        if (kbd->accents->kbdiacr[i].diacr == d &&
+            kbd->accents->kbdiacr[i].base == ch) {
+            return kbd->accents->kbdiacr[i].result;
+        }
+    }
+
+    if (ch == ' ' || ch == d)
+        return d;
+
+    put_utf8(kbd, d);
+
+    return ch;
+}
+
+static int vc_kbd_led(SDL_EVDEV_keyboard_state *kbd, int flag)
+{
+    return ((kbd->ledflagstate >> flag) & 1);
+}
+
+static void set_vc_kbd_led(SDL_EVDEV_keyboard_state *kbd, int flag)
+{
+    kbd->ledflagstate |= 1 << flag;
+}
+
+static void clr_vc_kbd_led(SDL_EVDEV_keyboard_state *kbd, int flag)
+{
+    kbd->ledflagstate &= ~(1 << flag);
+}
+
+static void chg_vc_kbd_lock(SDL_EVDEV_keyboard_state *kbd, int flag)
+{
+    kbd->lockstate ^= 1 << flag;
+}
+
+static void chg_vc_kbd_slock(SDL_EVDEV_keyboard_state *kbd, int flag)
+{
+    kbd->slockstate ^= 1 << flag;
+}
+
+static void chg_vc_kbd_led(SDL_EVDEV_keyboard_state *kbd, int flag)
+{
+    kbd->ledflagstate ^= 1 << flag;
+}
+
+/*
+ * Special function handlers
+ */
+
+static void fn_enter(SDL_EVDEV_keyboard_state *kbd)
+{
+    if (kbd->diacr) {
+        put_utf8(kbd, kbd->diacr);
+        kbd->diacr = 0;
+    }
+}
+
+static void fn_caps_toggle(SDL_EVDEV_keyboard_state *kbd)
+{
+    if (kbd->rep)
+        return;
+
+    chg_vc_kbd_led(kbd, K_CAPSLOCK);
+}
+
+static void fn_caps_on(SDL_EVDEV_keyboard_state *kbd)
+{
+    if (kbd->rep)
+        return;
+
+    set_vc_kbd_led(kbd, K_CAPSLOCK);
+}
+
+static void fn_num(SDL_EVDEV_keyboard_state *kbd)
+{
+    if (!kbd->rep)
+        chg_vc_kbd_led(kbd, K_NUMLOCK);
+}
+
+static void fn_compose(SDL_EVDEV_keyboard_state *kbd)
+{
+    kbd->dead_key_next = SDL_TRUE;
+}
+
+/*
+ * Special key handlers
+ */
+
+static void k_ignore(SDL_EVDEV_keyboard_state *kbd, unsigned char value, char up_flag)
+{
+}
+
+static void k_spec(SDL_EVDEV_keyboard_state *kbd, unsigned char value, char up_flag)
+{
+    if (up_flag)
+        return;
+    if (value >= SDL_arraysize(fn_handler))
+        return;
+    if (fn_handler[value])
+        fn_handler[value](kbd);
+}
+
+static void k_lowercase(SDL_EVDEV_keyboard_state *kbd, unsigned char value, char up_flag)
+{
+}
+
+static void k_self(SDL_EVDEV_keyboard_state *kbd, unsigned char value, char up_flag)
+{
+    if (up_flag)
+        return;        /* no action, if this is a key release */
+
+    if (kbd->diacr)
+        value = handle_diacr(kbd, value);
+
+    if (kbd->dead_key_next) {
+        kbd->dead_key_next = SDL_FALSE;
+        kbd->diacr = value;
+        return;
+    }
+    put_utf8(kbd, value);
+}
+
+static void k_deadunicode(SDL_EVDEV_keyboard_state *kbd, unsigned int value, char up_flag)
+{
+    if (up_flag)
+        return;
+
+    kbd->diacr = (kbd->diacr ? handle_diacr(kbd, value) : value);
+}
+
+static void k_dead(SDL_EVDEV_keyboard_state *kbd, unsigned char value, char up_flag)
+{
+    const unsigned char ret_diacr[NR_DEAD] = {'`', '\'', '^', '~', '"', ',' };
+
+    k_deadunicode(kbd, ret_diacr[value], up_flag);
+}
+
+static void k_dead2(SDL_EVDEV_keyboard_state *kbd, unsigned char value, char up_flag)
+{
+    k_deadunicode(kbd, value, up_flag);
+}
+
+static void k_cons(SDL_EVDEV_keyboard_state *kbd, unsigned char value, char up_flag)
+{
+}
+
+static void k_fn(SDL_EVDEV_keyboard_state *kbd, unsigned char value, char up_flag)
+{
+}
+
+static void k_cur(SDL_EVDEV_keyboard_state *kbd, unsigned char value, char up_flag)
+{
+}
+
+static void k_pad(SDL_EVDEV_keyboard_state *kbd, unsigned char value, char up_flag)
+{
+    static const char pad_chars[] = "0123456789+-*/\015,.?()#";
+
+    if (up_flag)
+        return;        /* no action, if this is a key release */
+
+    if (!vc_kbd_led(kbd, K_NUMLOCK)) {
+        /* unprintable action */
+        return;
+    }
+
+    put_queue(kbd, pad_chars[value]);
+}
+
+static void k_shift(SDL_EVDEV_keyboard_state *kbd, unsigned char value, char up_flag)
+{
+    int old_state = kbd->shift_state;
+
+    if (kbd->rep)
+        return;
+    /*
+     * Mimic typewriter:
+     * a CapsShift key acts like Shift but undoes CapsLock
+     */
+    if (value == KVAL(K_CAPSSHIFT)) {
+        value = KVAL(K_SHIFT);
+        if (!up_flag)
+            clr_vc_kbd_led(kbd, K_CAPSLOCK);
+    }
+
+    if (up_flag) {
+        /*
+         * handle the case that two shift or control
+         * keys are depressed simultaneously
+         */
+        if (kbd->shift_down[value])
+            kbd->shift_down[value]--;
+    } else
+        kbd->shift_down[value]++;
+
+    if (kbd->shift_down[value])
+        kbd->shift_state |= (1 << value);
+    else
+        kbd->shift_state &= ~(1 << value);
+
+    /* kludge */
+    if (up_flag && kbd->shift_state != old_state && kbd->npadch != -1) {
+        put_utf8(kbd, kbd->npadch);
+        kbd->npadch = -1;
+    }
+}
+
+static void k_meta(SDL_EVDEV_keyboard_state *kbd, unsigned char value, char up_flag)
+{
+}
+
+static void k_ascii(SDL_EVDEV_keyboard_state *kbd, unsigned char value, char up_flag)
+{
+    int base;
+
+    if (up_flag)
+        return;
+
+    if (value < 10) {
+        /* decimal input of code, while Alt depressed */
+        base = 10;
+    } else {
+        /* hexadecimal input of code, while AltGr depressed */
+        value -= 10;
+        base = 16;
+    }
+
+    if (kbd->npadch == -1)
+        kbd->npadch = value;
+    else
+        kbd->npadch = kbd->npadch * base + value;
+}
+
+static void k_lock(SDL_EVDEV_keyboard_state *kbd, unsigned char value, char up_flag)
+{
+    if (up_flag || kbd->rep)
+        return;
+
+    chg_vc_kbd_lock(kbd, value);
+}
+
+static void k_slock(SDL_EVDEV_keyboard_state *kbd, unsigned char value, char up_flag)
+{
+    k_shift(kbd, value, up_flag);
+    if (up_flag || kbd->rep)
+        return;
+
+    chg_vc_kbd_slock(kbd, value);
+    /* try to make Alt, oops, AltGr and such work */
+    if (!kbd->key_maps[kbd->lockstate ^ kbd->slockstate]) {
+        kbd->slockstate = 0;
+        chg_vc_kbd_slock(kbd, value);
+    }
+}
+
+static void k_brl(SDL_EVDEV_keyboard_state *kbd, unsigned char value, char up_flag)
+{
+}
+
+void
+SDL_EVDEV_kbd_keycode(SDL_EVDEV_keyboard_state *kbd, unsigned int keycode, int down)
+{
+    unsigned char shift_final;
+    unsigned char type;
+    unsigned short *key_map;
+    unsigned short keysym;
+
+    if (!kbd) {
+        return;
+    }
+
+    kbd->rep = (down == 2);
+
+    shift_final = (kbd->shift_state | kbd->slockstate) ^ kbd->lockstate;
+    key_map = kbd->key_maps[shift_final];
+    if (!key_map) {
+        kbd->slockstate = 0;
+        return;
+    }
+
+    if (keycode < NR_KEYS) {
+        keysym = key_map[keycode];
+    } else {
+        return;
+    }
+
+    type = KTYP(keysym);
+
+    if (type < 0xf0) {
+        if (down) {
+            put_utf8(kbd, keysym);
+        }
+    } else {
+        type -= 0xf0;
+
+        /* if type is KT_LETTER then it can be affected by Caps Lock */
+        if (type == KT_LETTER) {
+            type = KT_LATIN;
+
+            if (vc_kbd_led(kbd, K_CAPSLOCK)) {
+                key_map = kbd->key_maps[shift_final ^ (1 << KG_SHIFT)];
+                if (key_map) {
+                    keysym = key_map[keycode];
+                }
+            }
+        }
+
+        (*k_handler[type])(kbd, keysym & 0xff, !down);
+
+        if (type != KT_SLOCK) {
+            kbd->slockstate = 0;
+        }
+    }
+
+    if (kbd->text_len > 0) {
+        kbd->text[kbd->text_len] = '\0';
+        SDL_SendKeyboardText(kbd->text);
+        kbd->text_len = 0;
+    }
+}
+
+#else /* !SDL_INPUT_LINUXKD */
+
+SDL_EVDEV_keyboard_state *
+SDL_EVDEV_kbd_init(void)
+{
+    return NULL;
+}
+
+void
+SDL_EVDEV_kbd_keycode(SDL_EVDEV_keyboard_state *state, unsigned int keycode, int down)
+{
+}
+
+void
+SDL_EVDEV_kbd_quit(SDL_EVDEV_keyboard_state *state)
+{
+}
+
+#endif /* SDL_INPUT_LINUXKD */
+
+/* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/core/linux/SDL_evdev_kbd.h

@@ -0,0 +1,29 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+struct SDL_EVDEV_keyboard_state;
+typedef struct SDL_EVDEV_keyboard_state SDL_EVDEV_keyboard_state;
+
+extern SDL_EVDEV_keyboard_state *SDL_EVDEV_kbd_init(void);
+extern void SDL_EVDEV_kbd_keycode(SDL_EVDEV_keyboard_state *state, unsigned int keycode, int down);
+extern void SDL_EVDEV_kbd_quit(SDL_EVDEV_keyboard_state *state);
+
+/* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/core/linux/SDL_evdev_kbd_default_accents.h

@@ -0,0 +1,284 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+static struct kbdiacrs default_accents = {
+    68,
+    {
+        { 0x60, 0x41, 0xc0 },
+        { 0x60, 0x61, 0xe0 },
+        { 0x27, 0x41, 0xc1 },
+        { 0x27, 0x61, 0xe1 },
+        { 0x5e, 0x41, 0xc2 },
+        { 0x5e, 0x61, 0xe2 },
+        { 0x7e, 0x41, 0xc3 },
+        { 0x7e, 0x61, 0xe3 },
+        { 0x22, 0x41, 0xc4 },
+        { 0x22, 0x61, 0xe4 },
+        { 0x4f, 0x41, 0xc5 },
+        { 0x6f, 0x61, 0xe5 },
+        { 0x30, 0x41, 0xc5 },
+        { 0x30, 0x61, 0xe5 },
+        { 0x41, 0x41, 0xc5 },
+        { 0x61, 0x61, 0xe5 },
+        { 0x41, 0x45, 0xc6 },
+        { 0x61, 0x65, 0xe6 },
+        { 0x2c, 0x43, 0xc7 },
+        { 0x2c, 0x63, 0xe7 },
+        { 0x60, 0x45, 0xc8 },
+        { 0x60, 0x65, 0xe8 },
+        { 0x27, 0x45, 0xc9 },
+        { 0x27, 0x65, 0xe9 },
+        { 0x5e, 0x45, 0xca },
+        { 0x5e, 0x65, 0xea },
+        { 0x22, 0x45, 0xcb },
+        { 0x22, 0x65, 0xeb },
+        { 0x60, 0x49, 0xcc },
+        { 0x60, 0x69, 0xec },
+        { 0x27, 0x49, 0xcd },
+        { 0x27, 0x69, 0xed },
+        { 0x5e, 0x49, 0xce },
+        { 0x5e, 0x69, 0xee },
+        { 0x22, 0x49, 0xcf },
+        { 0x22, 0x69, 0xef },
+        { 0x2d, 0x44, 0xd0 },
+        { 0x2d, 0x64, 0xf0 },
+        { 0x7e, 0x4e, 0xd1 },
+        { 0x7e, 0x6e, 0xf1 },
+        { 0x60, 0x4f, 0xd2 },
+        { 0x60, 0x6f, 0xf2 },
+        { 0x27, 0x4f, 0xd3 },
+        { 0x27, 0x6f, 0xf3 },
+        { 0x5e, 0x4f, 0xd4 },
+        { 0x5e, 0x6f, 0xf4 },
+        { 0x7e, 0x4f, 0xd5 },
+        { 0x7e, 0x6f, 0xf5 },
+        { 0x22, 0x4f, 0xd6 },
+        { 0x22, 0x6f, 0xf6 },
+        { 0x2f, 0x4f, 0xd8 },
+        { 0x2f, 0x6f, 0xf8 },
+        { 0x60, 0x55, 0xd9 },
+        { 0x60, 0x75, 0xf9 },
+        { 0x27, 0x55, 0xda },
+        { 0x27, 0x75, 0xfa },
+        { 0x5e, 0x55, 0xdb },
+        { 0x5e, 0x75, 0xfb },
+        { 0x22, 0x55, 0xdc },
+        { 0x22, 0x75, 0xfc },
+        { 0x27, 0x59, 0xdd },
+        { 0x27, 0x79, 0xfd },
+        { 0x54, 0x48, 0xde },
+        { 0x74, 0x68, 0xfe },
+        { 0x73, 0x73, 0xdf },
+        { 0x22, 0x79, 0xff },
+        { 0x73, 0x7a, 0xdf },
+        { 0x69, 0x6a, 0xff },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+        { 0x00, 0x00, 0x00 },
+    }
+};
+
+/* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/core/linux/SDL_fcitx.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -118,71 +118,6 @@ GetAppName()
     return SDL_strdup("SDL_App");
 }
 
-/*
- * Copied from fcitx source
- */
-#define CONT(i)   ISUTF8_CB(in[i])
-#define VAL(i, s) ((in[i]&0x3f) << s)
-
-static char *
-_fcitx_utf8_get_char(const char *i, uint32_t *chr)
-{
-    const unsigned char* in = (const unsigned char *)i;
-    if (!(in[0] & 0x80)) {
-        *(chr) = *(in);
-        return (char *)in + 1;
-    }
-
-    /* 2-byte, 0x80-0x7ff */
-    if ((in[0] & 0xe0) == 0xc0 && CONT(1)) {
-        *chr = ((in[0] & 0x1f) << 6) | VAL(1, 0);
-        return (char *)in + 2;
-    }
-
-    /* 3-byte, 0x800-0xffff */
-    if ((in[0] & 0xf0) == 0xe0 && CONT(1) && CONT(2)) {
-        *chr = ((in[0] & 0xf) << 12) | VAL(1, 6) | VAL(2, 0);
-        return (char *)in + 3;
-    }
-
-    /* 4-byte, 0x10000-0x1FFFFF */
-    if ((in[0] & 0xf8) == 0xf0 && CONT(1) && CONT(2) && CONT(3)) {
-        *chr = ((in[0] & 0x7) << 18) | VAL(1, 12) | VAL(2, 6) | VAL(3, 0);
-        return (char *)in + 4;
-    }
-
-    /* 5-byte, 0x200000-0x3FFFFFF */
-    if ((in[0] & 0xfc) == 0xf8 && CONT(1) && CONT(2) && CONT(3) && CONT(4)) {
-        *chr = ((in[0] & 0x3) << 24) | VAL(1, 18) | VAL(2, 12) | VAL(3, 6) | VAL(4, 0);
-        return (char *)in + 5;
-    }
-
-    /* 6-byte, 0x400000-0x7FFFFFF */
-    if ((in[0] & 0xfe) == 0xfc && CONT(1) && CONT(2) && CONT(3) && CONT(4) && CONT(5)) {
-        *chr = ((in[0] & 0x1) << 30) | VAL(1, 24) | VAL(2, 18) | VAL(3, 12) | VAL(4, 6) | VAL(5, 0);
-        return (char *)in + 6;
-    }
-
-    *chr = *in;
-
-    return (char *)in + 1;
-}
-
-static size_t
-_fcitx_utf8_strlen(const char *s)
-{
-    unsigned int l = 0;
-
-    while (*s) {
-        uint32_t chr;
-
-        s = _fcitx_utf8_get_char(s, &chr);
-        l++;
-    }
-
-    return l;
-}
-
 static DBusHandlerResult
 DBus_MessageFilter(DBusConnection *conn, DBusMessage *msg, void *data)
 {
@@ -214,8 +149,8 @@ DBus_MessageFilter(DBusConnection *conn, DBusMessage *msg, void *data)
             size_t cursor = 0;
 
             while (i < text_bytes) {
-                size_t sz = SDL_utf8strlcpy(buf, text + i, sizeof(buf));
-                size_t chars = _fcitx_utf8_strlen(buf);
+                const size_t sz = SDL_utf8strlcpy(buf, text + i, sizeof(buf));
+                const size_t chars = SDL_utf8strlen(buf);
 
                 SDL_SendEditingText(buf, cursor, chars);
 
@@ -231,116 +166,50 @@ DBus_MessageFilter(DBusConnection *conn, DBusMessage *msg, void *data)
     return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 }
 
-static DBusMessage*
-FcitxClientICNewMethod(FcitxClient *client,
-        const char *method)
+static void
+FcitxClientICCallMethod(FcitxClient *client, const char *method)
 {
-    SDL_DBusContext *dbus = client->dbus;
-    return dbus->message_new_method_call(
-            client->servicename,
-            client->icname,
-            FCITX_IC_DBUS_INTERFACE,
-            method);
+    SDL_DBus_CallVoidMethod(client->servicename, client->icname, FCITX_IC_DBUS_INTERFACE, method, DBUS_TYPE_INVALID);
 }
 
-static void
-FcitxClientICCallMethod(FcitxClient *client,
-        const char *method)
-{
-    SDL_DBusContext *dbus = client->dbus;
-    DBusMessage *msg = FcitxClientICNewMethod(client, method);
-
-    if (msg == NULL)
-        return ;
-
-    if (dbus->connection_send(dbus->session_conn, msg, NULL)) {
-        dbus->connection_flush(dbus->session_conn);
-    }
-
-    dbus->message_unref(msg);
-}
-
-static void
+static void SDLCALL
 Fcitx_SetCapabilities(void *data,
         const char *name,
         const char *old_val,
         const char *internal_editing)
 {
     FcitxClient *client = (FcitxClient *)data;
-    SDL_DBusContext *dbus = client->dbus;
     Uint32 caps = CAPACITY_NONE;
 
-    DBusMessage *msg = FcitxClientICNewMethod(client, "SetCapacity");
-    if (msg == NULL)
-        return ;
-
     if (!(internal_editing && *internal_editing == '1')) {
         caps |= CAPACITY_PREEDIT;
     }
 
-    dbus->message_append_args(msg,
-            DBUS_TYPE_UINT32, &caps,
-            DBUS_TYPE_INVALID);
-    if (dbus->connection_send(dbus->session_conn, msg, NULL)) {
-        dbus->connection_flush(dbus->session_conn);
-    }
-
-    dbus->message_unref(msg);
+    SDL_DBus_CallVoidMethod(client->servicename, client->icname, FCITX_IC_DBUS_INTERFACE, "SetCapacity", DBUS_TYPE_UINT32, &caps, DBUS_TYPE_INVALID);
 }
 
-static void
+static SDL_bool
 FcitxClientCreateIC(FcitxClient *client)
 {
-    char *appname = NULL;
-    pid_t pid = 0;
-    int id = 0;
-    SDL_bool enable;
-    Uint32 arg1, arg2, arg3, arg4;
+    char *appname = GetAppName();
+    pid_t pid = getpid();
+    int id = -1;
+    Uint32 enable, arg1, arg2, arg3, arg4;
 
-    SDL_DBusContext *dbus = client->dbus;
-    DBusMessage *reply = NULL;
-    DBusMessage *msg = dbus->message_new_method_call(
-            client->servicename,
-            FCITX_IM_DBUS_PATH,
-            FCITX_IM_DBUS_INTERFACE,
-            "CreateICv3"
-            );
+    if (!SDL_DBus_CallMethod(client->servicename, FCITX_IM_DBUS_PATH, FCITX_IM_DBUS_INTERFACE, "CreateICv3",
+            DBUS_TYPE_STRING, &appname, DBUS_TYPE_INT32, &pid, DBUS_TYPE_INVALID,
+            DBUS_TYPE_INT32, &id, DBUS_TYPE_BOOLEAN, &enable, DBUS_TYPE_UINT32, &arg1, DBUS_TYPE_UINT32, &arg2, DBUS_TYPE_UINT32, &arg3, DBUS_TYPE_UINT32, &arg4, DBUS_TYPE_INVALID)) {
+        id = -1;  /* just in case. */
+    }
 
-    if (msg == NULL)
-        return ;
+    SDL_free(appname);
 
-    appname = GetAppName();
-    pid = getpid();
-    dbus->message_append_args(msg,
-            DBUS_TYPE_STRING, &appname,
-            DBUS_TYPE_INT32, &pid,
-            DBUS_TYPE_INVALID);
+    if (id >= 0) {
+        SDL_DBusContext *dbus = client->dbus;
 
-    do {
-        reply = dbus->connection_send_with_reply_and_block(
-                dbus->session_conn,
-                msg,
-                DBUS_TIMEOUT,
-                NULL);
-
-        if (!reply)
-            break;
-        if (!dbus->message_get_args(reply, NULL,
-                DBUS_TYPE_INT32, &id,
-                DBUS_TYPE_BOOLEAN, &enable,
-                DBUS_TYPE_UINT32, &arg1,
-                DBUS_TYPE_UINT32, &arg2,
-                DBUS_TYPE_UINT32, &arg3,
-                DBUS_TYPE_UINT32, &arg4,
-                DBUS_TYPE_INVALID))
-            break;
-
-        if (id < 0)
-            break;
         client->id = id;
 
-        SDL_snprintf(client->icname, IC_NAME_MAX,
-                FCITX_IC_DBUS_PATH, client->id);
+        SDL_snprintf(client->icname, IC_NAME_MAX, FCITX_IC_DBUS_PATH, client->id);
 
         dbus->bus_add_match(dbus->session_conn,
                 "type='signal', interface='org.fcitx.Fcitx.InputContext'",
@@ -350,14 +219,11 @@ FcitxClientCreateIC(FcitxClient *client)
                 NULL);
         dbus->connection_flush(dbus->session_conn);
 
-        SDL_AddHintCallback(SDL_HINT_IME_INTERNAL_EDITING, &Fcitx_SetCapabilities, client);
+        SDL_AddHintCallback(SDL_HINT_IME_INTERNAL_EDITING, Fcitx_SetCapabilities, client);
+        return SDL_TRUE;
     }
-    while (0);
 
-    if (reply)
-        dbus->message_unref(reply);
-    dbus->message_unref(msg);
-    SDL_free(appname);
+    return SDL_FALSE;
 }
 
 static Uint32
@@ -391,9 +257,7 @@ SDL_Fcitx_Init()
             "%s-%d",
             FCITX_DBUS_SERVICE, GetDisplayNumber());
 
-    FcitxClientCreateIC(&fcitx_client);
-
-    return SDL_TRUE;
+    return FcitxClientCreateIC(&fcitx_client);
 }
 
 void
@@ -422,47 +286,21 @@ SDL_Fcitx_Reset(void)
 SDL_bool
 SDL_Fcitx_ProcessKeyEvent(Uint32 keysym, Uint32 keycode)
 {
-    DBusMessage *msg = NULL;
-    DBusMessage *reply = NULL;
-    SDL_DBusContext *dbus = fcitx_client.dbus;
-
-    Uint32 state = 0;
-    SDL_bool handled = SDL_FALSE;
+    Uint32 state = Fcitx_ModState();
+    Uint32 handled = SDL_FALSE;
     int type = FCITX_PRESS_KEY;
     Uint32 event_time = 0;
 
-    msg = FcitxClientICNewMethod(&fcitx_client, "ProcessKeyEvent");
-    if (msg == NULL)
-        return SDL_FALSE;
-
-    state = Fcitx_ModState();
-    dbus->message_append_args(msg,
-            DBUS_TYPE_UINT32, &keysym,
-            DBUS_TYPE_UINT32, &keycode,
-            DBUS_TYPE_UINT32, &state,
-            DBUS_TYPE_INT32, &type,
-            DBUS_TYPE_UINT32, &event_time,
-            DBUS_TYPE_INVALID);
-
-    reply = dbus->connection_send_with_reply_and_block(dbus->session_conn,
-            msg,
-            -1,
-            NULL);
-
-    if (reply) {
-        dbus->message_get_args(reply,
-                NULL,
-                DBUS_TYPE_INT32, &handled,
-                DBUS_TYPE_INVALID);
-
-        dbus->message_unref(reply);
+    if (SDL_DBus_CallMethod(fcitx_client.servicename, fcitx_client.icname, FCITX_IC_DBUS_INTERFACE, "ProcessKeyEvent",
+            DBUS_TYPE_UINT32, &keysym, DBUS_TYPE_UINT32, &keycode, DBUS_TYPE_UINT32, &state, DBUS_TYPE_INT32, &type, DBUS_TYPE_UINT32, &event_time, DBUS_TYPE_INVALID,
+            DBUS_TYPE_INT32, &handled, DBUS_TYPE_INVALID)) {
+        if (handled) {
+            SDL_Fcitx_UpdateTextRect(NULL);
+            return SDL_TRUE;
+        }
     }
 
-    if (handled) {
-        SDL_Fcitx_UpdateTextRect(NULL);
-    }
-
-    return handled;
+    return SDL_FALSE;
 }
 
 void
@@ -473,10 +311,6 @@ SDL_Fcitx_UpdateTextRect(SDL_Rect *rect)
     int x = 0, y = 0;
     SDL_Rect *cursor = &fcitx_client.cursor_rect;
 
-    SDL_DBusContext *dbus = fcitx_client.dbus;
-    DBusMessage *msg = NULL;
-    DBusConnection *conn;
-
     if (rect) {
         SDL_memcpy(cursor, rect, sizeof(SDL_Rect));
     }
@@ -506,7 +340,7 @@ SDL_Fcitx_UpdateTextRect(SDL_Rect *rect)
 #endif
 
     if (cursor->x == -1 && cursor->y == -1 && cursor->w == 0 && cursor->h == 0) {
-        // move to bottom left
+        /* move to bottom left */
         int w = 0, h = 0;
         SDL_GetWindowSize(focused_win, &w, &h);
         cursor->x = 0;
@@ -516,26 +350,12 @@ SDL_Fcitx_UpdateTextRect(SDL_Rect *rect)
     x += cursor->x;
     y += cursor->y;
 
-    msg = FcitxClientICNewMethod(&fcitx_client, "SetCursorRect");
-    if (msg == NULL)
-        return ;
-
-    dbus->message_append_args(msg,
-            DBUS_TYPE_INT32, &x,
-            DBUS_TYPE_INT32, &y,
-            DBUS_TYPE_INT32, &cursor->w,
-            DBUS_TYPE_INT32, &cursor->h,
-            DBUS_TYPE_INVALID);
-
-    conn = dbus->session_conn;
-    if (dbus->connection_send(conn, msg, NULL))
-        dbus->connection_flush(conn);
-
-    dbus->message_unref(msg);
+    SDL_DBus_CallVoidMethod(fcitx_client.servicename, fcitx_client.icname, FCITX_IC_DBUS_INTERFACE, "SetCursorRect",
+        DBUS_TYPE_INT32, &x, DBUS_TYPE_INT32, &y, DBUS_TYPE_INT32, &cursor->w, DBUS_TYPE_INT32, &cursor->h, DBUS_TYPE_INVALID);
 }
 
 void
-SDL_Fcitx_PumpEvents()
+SDL_Fcitx_PumpEvents(void)
 {
     SDL_DBusContext *dbus = fcitx_client.dbus;
     DBusConnection *conn = dbus->session_conn;

Engine/lib/sdl/src/core/linux/SDL_fcitx.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -19,8 +19,8 @@
   3. This notice may not be removed or altered from any source distribution.
 */
 
-#ifndef _SDL_fcitx_h
-#define _SDL_fcitx_h
+#ifndef SDL_fcitx_h_
+#define SDL_fcitx_h_
 
 #include "../../SDL_internal.h"
 
@@ -33,8 +33,8 @@ extern void SDL_Fcitx_SetFocus(SDL_bool focused);
 extern void SDL_Fcitx_Reset(void);
 extern SDL_bool SDL_Fcitx_ProcessKeyEvent(Uint32 keysym, Uint32 keycode);
 extern void SDL_Fcitx_UpdateTextRect(SDL_Rect *rect);
-extern void SDL_Fcitx_PumpEvents();
+extern void SDL_Fcitx_PumpEvents(void);
 
-#endif /* _SDL_fcitx_h */
+#endif /* SDL_fcitx_h_ */
 
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/core/linux/SDL_ibus.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -45,7 +45,7 @@ static char *input_ctx_path = NULL;
 static SDL_Rect ibus_cursor_rect = { 0, 0, 0, 0 };
 static DBusConnection *ibus_conn = NULL;
 static char *ibus_addr_file = NULL;
-int inotify_fd = -1, inotify_wd = -1;
+static int inotify_fd = -1, inotify_wd = -1;
 
 static Uint32
 IBus_ModState(void)
@@ -107,21 +107,6 @@ IBus_GetVariantText(DBusConnection *conn, DBusMessageIter *iter, SDL_DBusContext
     return text;
 }
 
-static size_t 
-IBus_utf8_strlen(const char *str)
-{
-    size_t utf8_len = 0;
-    const char *p;
-    
-    for (p = str; *p; ++p) {
-        if (!((*p & 0x80) && !(*p & 0x40))) {
-            ++utf8_len;
-        }
-    }
-    
-    return utf8_len;
-}
-
 static DBusHandlerResult
 IBus_MessageHandler(DBusConnection *conn, DBusMessage *msg, void *user_data)
 {
@@ -135,7 +120,7 @@ IBus_MessageHandler(DBusConnection *conn, DBusMessage *msg, void *user_data)
         
         text = IBus_GetVariantText(conn, &iter, dbus);
         if (text && *text) {
-            char buf[SDL_TEXTEDITINGEVENT_TEXT_SIZE];
+            char buf[SDL_TEXTINPUTEVENT_TEXT_SIZE];
             size_t text_bytes = SDL_strlen(text), i = 0;
             
             while (i < text_bytes) {
@@ -162,8 +147,8 @@ IBus_MessageHandler(DBusConnection *conn, DBusMessage *msg, void *user_data)
             size_t cursor = 0;
             
             do {
-                size_t sz = SDL_utf8strlcpy(buf, text+i, sizeof(buf));
-                size_t chars = IBus_utf8_strlen(buf);
+                const size_t sz = SDL_utf8strlcpy(buf, text+i, sizeof(buf));
+                const size_t chars = SDL_utf8strlen(buf);
                 
                 SDL_SendEditingText(buf, cursor, chars);
 
@@ -302,35 +287,20 @@ IBus_GetDBusAddressFilename(void)
 
 static SDL_bool IBus_CheckConnection(SDL_DBusContext *dbus);
 
-static void
+static void SDLCALL
 IBus_SetCapabilities(void *data, const char *name, const char *old_val,
                                                    const char *internal_editing)
 {
     SDL_DBusContext *dbus = SDL_DBus_GetContext();
     
     if (IBus_CheckConnection(dbus)) {
+        Uint32 caps = IBUS_CAP_FOCUS;
+        if (!(internal_editing && *internal_editing == '1')) {
+            caps |= IBUS_CAP_PREEDIT_TEXT;
+        }
 
-        DBusMessage *msg = dbus->message_new_method_call(IBUS_SERVICE,
-                                                         input_ctx_path,
-                                                         IBUS_INPUT_INTERFACE,
-                                                         "SetCapabilities");
-        if (msg) {
-            Uint32 caps = IBUS_CAP_FOCUS;
-            if (!(internal_editing && *internal_editing == '1')) {
-                caps |= IBUS_CAP_PREEDIT_TEXT;
-            }
-            
-            dbus->message_append_args(msg,
-                                      DBUS_TYPE_UINT32, &caps,
-                                      DBUS_TYPE_INVALID);
-        }
-        
-        if (msg) {
-            if (dbus->connection_send(ibus_conn, msg, NULL)) {
-                dbus->connection_flush(ibus_conn);
-            }
-            dbus->message_unref(msg);
-        }
+        SDL_DBus_CallVoidMethodOnConnection(ibus_conn, IBUS_SERVICE, input_ctx_path, IBUS_INPUT_INTERFACE, "SetCapabilities",
+                                DBUS_TYPE_UINT32, &caps, DBUS_TYPE_INVALID);
     }
 }
 
@@ -338,9 +308,9 @@ IBus_SetCapabilities(void *data, const char *name, const char *old_val,
 static SDL_bool
 IBus_SetupConnection(SDL_DBusContext *dbus, const char* addr)
 {
+    const char *client_name = "SDL2_Application";
     const char *path = NULL;
     SDL_bool result = SDL_FALSE;
-    DBusMessage *msg;
     DBusObjectPathVTable ibus_vtable;
 
     SDL_zero(ibus_vtable);
@@ -361,39 +331,17 @@ IBus_SetupConnection(SDL_DBusContext *dbus, const char* addr)
     
     dbus->connection_flush(ibus_conn);
 
-    msg = dbus->message_new_method_call(IBUS_SERVICE, IBUS_PATH, IBUS_INTERFACE, "CreateInputContext");
-    if (msg) {
-        const char *client_name = "SDL2_Application";
-        dbus->message_append_args(msg,
-                                  DBUS_TYPE_STRING, &client_name,
-                                  DBUS_TYPE_INVALID);
-    }
-    
-    if (msg) {
-        DBusMessage *reply;
-        
-        reply = dbus->connection_send_with_reply_and_block(ibus_conn, msg, 1000, NULL);
-        if (reply) {
-            if (dbus->message_get_args(reply, NULL,
-                                       DBUS_TYPE_OBJECT_PATH, &path,
-                                       DBUS_TYPE_INVALID)) {
-                if (input_ctx_path) {
-                    SDL_free(input_ctx_path);
-                }
-                input_ctx_path = SDL_strdup(path);
-                result = SDL_TRUE;                          
-            }
-            dbus->message_unref(reply);
-        }
-        dbus->message_unref(msg);
-    }
-
-    if (result) {
-        SDL_AddHintCallback(SDL_HINT_IME_INTERNAL_EDITING, &IBus_SetCapabilities, NULL);
+    if (SDL_DBus_CallMethodOnConnection(ibus_conn, IBUS_SERVICE, IBUS_PATH, IBUS_INTERFACE, "CreateInputContext",
+            DBUS_TYPE_STRING, &client_name, DBUS_TYPE_INVALID,
+            DBUS_TYPE_OBJECT_PATH, &path, DBUS_TYPE_INVALID)) {
+        SDL_free(input_ctx_path);
+        input_ctx_path = SDL_strdup(path);
+        SDL_AddHintCallback(SDL_HINT_IME_INTERNAL_EDITING, IBus_SetCapabilities, NULL);
         
         dbus->bus_add_match(ibus_conn, "type='signal',interface='org.freedesktop.IBus.InputContext'", NULL);
         dbus->connection_try_register_object_path(ibus_conn, input_ctx_path, &ibus_vtable, dbus, NULL);
         dbus->connection_flush(ibus_conn);
+        result = SDL_TRUE;
     }
 
     SDL_IBus_SetFocus(SDL_GetKeyboardFocus() != NULL);
@@ -521,7 +469,7 @@ SDL_IBus_Quit(void)
         inotify_wd = -1;
     }
     
-    SDL_DelHintCallback(SDL_HINT_IME_INTERNAL_EDITING, &IBus_SetCapabilities, NULL);
+    SDL_DelHintCallback(SDL_HINT_IME_INTERNAL_EDITING, IBus_SetCapabilities, NULL);
     
     SDL_memset(&ibus_cursor_rect, 0, sizeof(ibus_cursor_rect));
 }
@@ -532,16 +480,7 @@ IBus_SimpleMessage(const char *method)
     SDL_DBusContext *dbus = SDL_DBus_GetContext();
     
     if (IBus_CheckConnection(dbus)) {
-        DBusMessage *msg = dbus->message_new_method_call(IBUS_SERVICE,
-                                                         input_ctx_path,
-                                                         IBUS_INPUT_INTERFACE,
-                                                         method);
-        if (msg) {
-            if (dbus->connection_send(ibus_conn, msg, NULL)) {
-                dbus->connection_flush(ibus_conn);
-            }
-            dbus->message_unref(msg);
-        }
+        SDL_DBus_CallVoidMethodOnConnection(ibus_conn, IBUS_SERVICE, input_ctx_path, IBUS_INPUT_INTERFACE, method, DBUS_TYPE_INVALID);
     }
 }
 
@@ -561,43 +500,21 @@ SDL_IBus_Reset(void)
 SDL_bool
 SDL_IBus_ProcessKeyEvent(Uint32 keysym, Uint32 keycode)
 { 
-    SDL_bool result = SDL_FALSE;   
+    Uint32 result = 0;
     SDL_DBusContext *dbus = SDL_DBus_GetContext();
     
     if (IBus_CheckConnection(dbus)) {
-        DBusMessage *msg = dbus->message_new_method_call(IBUS_SERVICE,
-                                                         input_ctx_path,
-                                                         IBUS_INPUT_INTERFACE,
-                                                         "ProcessKeyEvent");
-        if (msg) {
-            Uint32 mods = IBus_ModState();
-            dbus->message_append_args(msg,
-                                      DBUS_TYPE_UINT32, &keysym,
-                                      DBUS_TYPE_UINT32, &keycode,
-                                      DBUS_TYPE_UINT32, &mods,
-                                      DBUS_TYPE_INVALID);
+        Uint32 mods = IBus_ModState();
+        if (!SDL_DBus_CallMethodOnConnection(ibus_conn, IBUS_SERVICE, input_ctx_path, IBUS_INPUT_INTERFACE, "ProcessKeyEvent",
+                DBUS_TYPE_UINT32, &keysym, DBUS_TYPE_UINT32, &keycode, DBUS_TYPE_UINT32, &mods, DBUS_TYPE_INVALID,
+                DBUS_TYPE_BOOLEAN, &result, DBUS_TYPE_INVALID)) {
+            result = 0;
         }
-        
-        if (msg) {
-            DBusMessage *reply;
-            
-            reply = dbus->connection_send_with_reply_and_block(ibus_conn, msg, 300, NULL);
-            if (reply) {
-                if (!dbus->message_get_args(reply, NULL,
-                                           DBUS_TYPE_BOOLEAN, &result,
-                                           DBUS_TYPE_INVALID)) {
-                    result = SDL_FALSE;                         
-                }
-                dbus->message_unref(reply);
-            }
-            dbus->message_unref(msg);
-        }
-        
     }
     
     SDL_IBus_UpdateTextRect(NULL);
 
-    return result;
+    return result ? SDL_TRUE : SDL_FALSE;
 }
 
 void
@@ -643,25 +560,8 @@ SDL_IBus_UpdateTextRect(SDL_Rect *rect)
     dbus = SDL_DBus_GetContext();
     
     if (IBus_CheckConnection(dbus)) {
-        DBusMessage *msg = dbus->message_new_method_call(IBUS_SERVICE,
-                                                         input_ctx_path,
-                                                         IBUS_INPUT_INTERFACE,
-                                                         "SetCursorLocation");
-        if (msg) {
-            dbus->message_append_args(msg,
-                                      DBUS_TYPE_INT32, &x,
-                                      DBUS_TYPE_INT32, &y,
-                                      DBUS_TYPE_INT32, &ibus_cursor_rect.w,
-                                      DBUS_TYPE_INT32, &ibus_cursor_rect.h,
-                                      DBUS_TYPE_INVALID);
-        }
-        
-        if (msg) {
-            if (dbus->connection_send(ibus_conn, msg, NULL)) {
-                dbus->connection_flush(ibus_conn);
-            }
-            dbus->message_unref(msg);
-        }
+        SDL_DBus_CallVoidMethodOnConnection(ibus_conn, IBUS_SERVICE, input_ctx_path, IBUS_INPUT_INTERFACE, "SetCursorLocation",
+                DBUS_TYPE_INT32, &x, DBUS_TYPE_INT32, &y, DBUS_TYPE_INT32, &ibus_cursor_rect.w, DBUS_TYPE_INT32, &ibus_cursor_rect.h, DBUS_TYPE_INVALID);
     }
 }
 
@@ -680,3 +580,5 @@ SDL_IBus_PumpEvents(void)
 }
 
 #endif
+
+/* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/core/linux/SDL_ibus.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -21,8 +21,8 @@
 
 #include "../../SDL_internal.h"
 
-#ifndef _SDL_ibus_h
-#define _SDL_ibus_h
+#ifndef SDL_ibus_h_
+#define SDL_ibus_h_
 
 #ifdef HAVE_IBUS_IBUS_H
 #define SDL_USE_IBUS 1
@@ -49,10 +49,10 @@ extern void SDL_IBus_UpdateTextRect(SDL_Rect *window_relative_rect);
 
 /* Checks DBus for new IBus events, and calls SDL_SendKeyboardText / 
    SDL_SendEditingText for each event it finds */
-extern void SDL_IBus_PumpEvents();
+extern void SDL_IBus_PumpEvents(void);
 
 #endif /* HAVE_IBUS_IBUS_H */
 
-#endif /* _SDL_ibus_h */
+#endif /* SDL_ibus_h_ */
 
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/core/linux/SDL_ime.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -87,8 +87,20 @@ SDL_IME_Init(void)
 {
     InitIME();
 
-    if (SDL_IME_Init_Real)
-        return SDL_IME_Init_Real();
+    if (SDL_IME_Init_Real) {
+        if (SDL_IME_Init_Real()) {
+            return SDL_TRUE;
+        }
+
+        /* uhoh, the IME implementation's init failed! Disable IME support. */
+        SDL_IME_Init_Real = NULL;
+        SDL_IME_Quit_Real = NULL;
+        SDL_IME_SetFocus_Real = NULL;
+        SDL_IME_Reset_Real = NULL;
+        SDL_IME_ProcessKeyEvent_Real = NULL;
+        SDL_IME_UpdateTextRect_Real = NULL;
+        SDL_IME_PumpEvents_Real = NULL;
+    }
 
     return SDL_FALSE;
 }
@@ -136,3 +148,5 @@ SDL_IME_PumpEvents()
     if (SDL_IME_PumpEvents_Real)
         SDL_IME_PumpEvents_Real();
 }
+
+/* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/core/linux/SDL_ime.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -19,20 +19,22 @@
   3. This notice may not be removed or altered from any source distribution.
 */
 
-#ifndef _SDL_ime_h
-#define _SDL_ime_h
+#ifndef SDL_ime_h_
+#define SDL_ime_h_
 
 #include "../../SDL_internal.h"
 
 #include "SDL_stdinc.h"
 #include "SDL_rect.h"
 
-extern SDL_bool SDL_IME_Init();
-extern void SDL_IME_Quit();
+extern SDL_bool SDL_IME_Init(void);
+extern void SDL_IME_Quit(void);
 extern void SDL_IME_SetFocus(SDL_bool focused);
-extern void SDL_IME_Reset();
+extern void SDL_IME_Reset(void);
 extern SDL_bool SDL_IME_ProcessKeyEvent(Uint32 keysym, Uint32 keycode);
 extern void SDL_IME_UpdateTextRect(SDL_Rect *rect);
-extern void SDL_IME_PumpEvents();
+extern void SDL_IME_PumpEvents(void);
 
-#endif /* _SDL_ime_h */
+#endif /* SDL_ime_h_ */
+
+/* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/core/linux/SDL_udev.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -31,9 +31,12 @@
 
 #include <linux/input.h>
 
-#include "SDL.h"
+#include "SDL_assert.h"
+#include "SDL_loadso.h"
+#include "SDL_timer.h"
+#include "../unix/SDL_poll.h"
 
-static const char* SDL_UDEV_LIBS[] = { "libudev.so.1", "libudev.so.0" };
+static const char *SDL_UDEV_LIBS[] = { "libudev.so.1", "libudev.so.0" };
 
 #define _THIS SDL_UDEV_PrivateData *_this
 static _THIS = NULL;
@@ -98,14 +101,7 @@ SDL_UDEV_hotplug_update_available(void)
 {
     if (_this->udev_mon != NULL) {
         const int fd = _this->udev_monitor_get_fd(_this->udev_mon);
-        fd_set fds;
-        struct timeval tv;
-
-        FD_ZERO(&fds);
-        FD_SET(fd, &fds);
-        tv.tv_sec = 0;
-        tv.tv_usec = 0;
-        if ((select(fd+1, &fds, NULL, NULL, &tv) > 0) && (FD_ISSET(fd, &fds))) {
+        if (SDL_IOReady(fd, SDL_FALSE, 0)) {
             return SDL_TRUE;
         }
     }
@@ -209,7 +205,7 @@ SDL_UDEV_Scan(void)
     enumerate = _this->udev_enumerate_new(_this->udev);
     if (enumerate == NULL) {
         SDL_UDEV_Quit();
-        SDL_SetError("udev_monitor_new_from_netlink() failed");
+        SDL_SetError("udev_enumerate_new() failed");
         return;
     }
     
@@ -252,8 +248,25 @@ SDL_UDEV_LoadLibrary(void)
     if (_this == NULL) {
         return SDL_SetError("UDEV not initialized");
     }
-    
-   
+ 
+    /* See if there is a udev library already loaded */
+    if (SDL_UDEV_load_syms() == 0) {
+        return 0;
+    }
+
+#ifdef SDL_UDEV_DYNAMIC
+    /* Check for the build environment's libudev first */
+    if (_this->udev_handle == NULL) {
+        _this->udev_handle = SDL_LoadObject(SDL_UDEV_DYNAMIC);
+        if (_this->udev_handle != NULL) {
+            retval = SDL_UDEV_load_syms();
+            if (retval < 0) {
+                SDL_UDEV_UnloadLibrary();
+            }
+        }
+    }
+#endif
+
     if (_this->udev_handle == NULL) {
         for( i = 0 ; i < SDL_arraysize(SDL_UDEV_LIBS); i++) {
             _this->udev_handle = SDL_LoadObject(SDL_UDEV_LIBS[i]);
@@ -280,7 +293,6 @@ SDL_UDEV_LoadLibrary(void)
 #define BITS_PER_LONG           (sizeof(unsigned long) * 8)
 #define NBITS(x)                ((((x)-1)/BITS_PER_LONG)+1)
 #define OFF(x)                  ((x)%BITS_PER_LONG)
-#define BIT(x)                  (1UL<<OFF(x))
 #define LONG(x)                 ((x)/BITS_PER_LONG)
 #define test_bit(bit, array)    ((array[LONG(bit)] >> OFF(bit)) & 1)
 
@@ -537,3 +549,5 @@ SDL_UDEV_DelCallback(SDL_UDEV_Callback cb)
 
 
 #endif /* SDL_USE_LIBUDEV */
+
+/* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/core/linux/SDL_udev.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -21,8 +21,8 @@
 
 #include "../../SDL_internal.h"
 
-#ifndef _SDL_udev_h
-#define _SDL_udev_h
+#ifndef SDL_udev_h_
+#define SDL_udev_h_
 
 #if HAVE_LIBUDEV_H
 
@@ -116,4 +116,6 @@ extern void SDL_UDEV_DelCallback(SDL_UDEV_Callback cb);
 
 #endif /* HAVE_LIBUDEV_H */
 
-#endif /* _SDL_udev_h */
+#endif /* SDL_udev_h_ */
+
+/* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/core/unix/SDL_poll.c

@@ -0,0 +1,87 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "../../SDL_internal.h"
+
+#include "SDL_assert.h"
+#include "SDL_poll.h"
+
+#ifdef HAVE_POLL
+#include <poll.h>
+#else
+#include <sys/time.h>
+#include <sys/types.h>
+#include <unistd.h>
+#endif
+#include <errno.h>
+
+
+int
+SDL_IOReady(int fd, SDL_bool forWrite, int timeoutMS)
+{
+    int result;
+
+    /* Note: We don't bother to account for elapsed time if we get EINTR */
+    do
+    {
+#ifdef HAVE_POLL
+        struct pollfd info;
+
+        info.fd = fd;
+        if (forWrite) {
+            info.events = POLLOUT;
+        } else {
+            info.events = POLLIN | POLLPRI;
+        }
+        result = poll(&info, 1, timeoutMS);
+#else
+        fd_set rfdset, *rfdp = NULL;
+        fd_set wfdset, *wfdp = NULL;
+        struct timeval tv, *tvp = NULL;
+
+        /* If this assert triggers we'll corrupt memory here */
+        SDL_assert(fd >= 0 && fd < FD_SETSIZE);
+
+        if (forWrite) {
+            FD_ZERO(&wfdset);
+            FD_SET(fd, &wfdset);
+            wfdp = &wfdset;
+        } else {
+            FD_ZERO(&rfdset);
+            FD_SET(fd, &rfdset);
+            rfdp = &rfdset;
+        }
+
+        if (timeoutMS >= 0) {
+            tv.tv_sec = timeoutMS / 1000;
+            tv.tv_usec = (timeoutMS % 1000) * 1000;
+            tvp = &tv;
+        }
+
+        result = select(fd + 1, rfdp, wfdp, NULL, tvp);
+#endif /* HAVE_POLL */
+
+    } while ( result < 0 && errno == EINTR );
+
+    return result;
+}
+
+/* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/core/unix/SDL_poll.h

@@ -0,0 +1,34 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "../../SDL_internal.h"
+
+#ifndef SDL_poll_h_
+#define SDL_poll_h_
+
+#include "SDL_stdinc.h"
+
+
+extern int SDL_IOReady(int fd, SDL_bool forWrite, int timeoutMS);
+
+#endif /* SDL_poll_h_ */
+
+/* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/core/windows/SDL_directx.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -20,8 +20,8 @@
 */
 #include "../../SDL_internal.h"
 
-#ifndef _SDL_directx_h
-#define _SDL_directx_h
+#ifndef SDL_directx_h_
+#define SDL_directx_h_
 
 /* Include all of the DirectX 8.0 headers and adds any necessary tweaks */
 
@@ -106,6 +106,6 @@
 typedef struct { int unused; } DIDEVICEINSTANCE;
 #endif
 
-#endif /* _SDL_directx_h */
+#endif /* SDL_directx_h_ */
 
 /* vi: set ts=4 sw=4 expandtab: */

Engine/lib/sdl/src/core/windows/SDL_windows.c

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -33,7 +33,7 @@
 #endif
 
 
-/* Sets an error message based on GetLastError() */
+/* Sets an error message based on an HRESULT */
 int
 WIN_SetErrorFromHRESULT(const char *prefix, HRESULT hr)
 {
@@ -115,7 +115,7 @@ IsWindowsVersionOrGreater(WORD wMajorVersion, WORD wMinorVersion, WORD wServiceP
 }
 #endif
 
-BOOL WIN_IsWindowsVistaOrGreater()
+BOOL WIN_IsWindowsVistaOrGreater(void)
 {
 #ifdef __WINRT__
     return TRUE;
@@ -124,6 +124,15 @@ BOOL WIN_IsWindowsVistaOrGreater()
 #endif
 }
 
+BOOL WIN_IsWindows7OrGreater(void)
+{
+#ifdef __WINRT__
+    return TRUE;
+#else
+    return IsWindowsVersionOrGreater(HIBYTE(_WIN32_WINNT_WIN7), LOBYTE(_WIN32_WINNT_WIN7), 0);
+#endif
+}
+
 /*
 WAVExxxCAPS gives you 31 bytes for the device name, and just truncates if it's
 longer. However, since WinXP, you can use the WAVExxxCAPS2 structure, which
@@ -142,6 +151,8 @@ Registry, and a unhelpful "Microphone(Yeti Stereo Microph" in winmm. Sigh.
 
 (Also, DirectSound shouldn't be limited to 32 chars, but its device enum
 has the same problem.)
+
+WASAPI doesn't need this. This is just for DirectSound/WinMM.
 */
 char *
 WIN_LookupAudioDeviceName(const WCHAR *name, const GUID *guid)
@@ -158,7 +169,7 @@ WIN_LookupAudioDeviceName(const WCHAR *name, const GUID *guid)
     DWORD len = 0;
     char *retval = NULL;
 
-    if (SDL_memcmp(guid, &nullguid, sizeof (*guid)) == 0) {
+    if (WIN_IsEqualGUID(guid, &nullguid)) {
         return WIN_StringToUTF8(name);  /* No GUID, go with what we've got. */
     }
 
@@ -202,6 +213,18 @@ WIN_LookupAudioDeviceName(const WCHAR *name, const GUID *guid)
 #endif /* if __WINRT__ / else */
 }
 
+BOOL
+WIN_IsEqualGUID(const GUID * a, const GUID * b)
+{
+    return (SDL_memcmp(a, b, sizeof (*a)) == 0);
+}
+
+BOOL
+WIN_IsEqualIID(REFIID a, REFIID b)
+{
+    return (SDL_memcmp(a, b, sizeof (*a)) == 0);
+}
+
 #endif /* __WIN32__ || __WINRT__ */
 
 /* vi: set ts=4 sw=4 expandtab: */