Initial commit

added libraries:
opus
flac
libsndfile

updated:
libvorbis
libogg
openal

- Everything works as expected for now. Bare in mind libsndfile needed the check for whether or not it could find the xiph libraries removed in order for this to work.

Engine/lib/flac/cmake/CheckA64NEON.c.in

@@ -0,0 +1,6 @@
+#include <arm_neon.h>
+int main (void)
+{
+    float64x2_t tmp;
+    tmp = vdupq_n_f64(0.0f);
+}

Engine/lib/flac/cmake/CheckA64NEON.cmake

@@ -0,0 +1,14 @@
+macro(CHECK_A64NEON VARIABLE)
+    if(NOT DEFINED HAVE_${VARIABLE})
+        message(STATUS "Check whether A64 NEON can be used")
+        configure_file(${PROJECT_SOURCE_DIR}/cmake/CheckA64NEON.c.in ${PROJECT_BINARY_DIR}/CMakeFiles/CMakeTmp/CheckA64NEON.c @ONLY)
+        try_compile(HAVE_${VARIABLE} "${PROJECT_BINARY_DIR}"
+            "${PROJECT_BINARY_DIR}/CMakeFiles/CMakeTmp/CheckA64NEON.c")
+        if(HAVE_${VARIABLE})
+            message(STATUS "Check whether A64 NEON can be used - yes")
+            set(${VARIABLE} 1 CACHE INTERNAL "Result of CHECK_A64NEON" FORCE)
+        else ()
+            message(STATUS "Check whether A64 NEON can be used - no")
+        endif()
+    endif ()
+endmacro(CHECK_A64NEON)

Engine/lib/flac/cmake/CheckCPUArch.c.in

@@ -0,0 +1,7 @@
+int main(void) {
+#if @CHECK_CPU_ARCH_DEFINES@
+    return 0;
+#else
+    fail
+#endif
+}

Engine/lib/flac/cmake/CheckCPUArch.cmake

@@ -0,0 +1,27 @@
+macro(_CHECK_CPU_ARCH ARCH ARCH_DEFINES VARIABLE)
+    if(NOT DEFINED HAVE_${VARIABLE})
+        message(STATUS "Check CPU architecture is ${ARCH}")
+        set(CHECK_CPU_ARCH_DEFINES ${ARCH_DEFINES})
+        configure_file(${PROJECT_SOURCE_DIR}/cmake/CheckCPUArch.c.in ${PROJECT_BINARY_DIR}/CMakeFiles/CMakeTmp/CheckCPUArch.c @ONLY)
+        try_compile(HAVE_${VARIABLE} "${PROJECT_BINARY_DIR}"
+            "${PROJECT_BINARY_DIR}/CMakeFiles/CMakeTmp/CheckCPUArch.c")
+        if(HAVE_${VARIABLE})
+            message(STATUS "Check CPU architecture is ${ARCH} - yes")
+            set(${VARIABLE} 1 CACHE INTERNAL "Result of CHECK_CPU_ARCH" FORCE)
+        else ()
+            message(STATUS "Check CPU architecture is ${ARCH} - no")
+        endif()
+    endif ()
+endmacro(_CHECK_CPU_ARCH)
+
+macro(CHECK_CPU_ARCH_X64 VARIABLE)
+    _CHECK_CPU_ARCH(x64 "defined(__amd64__) || defined(__amd64) || defined(__x86_64__) || defined(__x86_64) || defined(_M_X64) || defined(_M_AMD64)" ${VARIABLE})
+endmacro(CHECK_CPU_ARCH_X64)
+
+macro(CHECK_CPU_ARCH_X86 VARIABLE)
+    _CHECK_CPU_ARCH(x86 "defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__) ||defined( __i386) || defined(_M_IX86)" ${VARIABLE})
+endmacro(CHECK_CPU_ARCH_X86)
+
+macro(CHECK_CPU_ARCH_ARM64 VARIABLE)
+    _CHECK_CPU_ARCH(arm64 "defined(__aarch64__) || defined(__arm64__)" ${VARIABLE})
+endmacro(CHECK_CPU_ARCH_ARM64)

Engine/lib/flac/cmake/FindOgg.cmake

@@ -0,0 +1,26 @@
+find_package(PkgConfig)
+pkg_check_modules(_OGG QUIET ogg)
+
+find_path(OGG_INCLUDE_DIR
+    NAMES "ogg/ogg.h"
+    PATHS ${_OGG_INCLUDE_DIRS})
+
+find_library(OGG_LIBRARY
+    NAMES ogg libogg
+    HINTS ${_OGG_LIBRARY_DIRS})
+
+mark_as_advanced(
+    OGG_INCLUDE_DIR
+    OGG_LIBRARY)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Ogg
+    REQUIRED_VARS OGG_INCLUDE_DIR OGG_LIBRARY
+    VERSION_VAR _OGG_VERSION)
+
+if(OGG_FOUND AND NOT TARGET Ogg::ogg)
+    add_library(Ogg::ogg UNKNOWN IMPORTED)
+    set_target_properties(Ogg::ogg PROPERTIES
+        INTERFACE_INCLUDE_DIRECTORIES "${OGG_INCLUDE_DIR}"
+        IMPORTED_LOCATION "${OGG_LIBRARY}")
+endif()

Engine/lib/flac/cmake/UseSystemExtensions.cmake

@@ -0,0 +1,63 @@
+include(CheckCSourceCompiles)
+
+check_c_source_compiles("
+    #include <wchar.h>
+    mbstate_t x;
+    int main() { return 0; }"
+    HAVE_MBSTATE)
+if(NOT HAVE_MBSTATE)
+    check_c_source_compiles("
+        #define _XOPEN_SOURCE 500
+        #include <wchar.h>
+        mbstate_t x;
+        int main() { return 0; }"
+        DODEFINE_XOPEN_SOURCE)
+endif()
+check_c_source_compiles("
+    #define __EXTENSIONS__ 1
+    #include <stdio.h>
+    #ifdef HAVE_SYS_TYPES_H
+    # include <sys/types.h>
+    #endif
+    #ifdef HAVE_SYS_STAT_H
+    # include <sys/stat.h>
+    #endif
+    #ifdef STDC_HEADERS
+    # include <stdlib.h>
+    # include <stddef.h>
+    #else
+    # ifdef HAVE_STDLIB_H
+    #  include <stdlib.h>
+    # endif
+    #endif
+    #ifdef HAVE_STRING_H
+    # if !defined STDC_HEADERS && defined HAVE_MEMORY_H
+    #  include <memory.h>
+    # endif
+    # include <string.h>
+    #endif
+    #ifdef HAVE_STRINGS_H
+    # include <strings.h>
+    #endif
+    #ifdef HAVE_INTTYPES_H
+    # include <inttypes.h>
+    #endif
+    #ifdef HAVE_STDINT_H
+    # include <stdint.h>
+    #endif
+    #ifdef HAVE_UNISTD_H
+    # include <unistd.h>
+    #endif
+    int main() { return 0; }"
+    DODEFINE_EXTENSIONS)
+
+add_definitions(
+    -D_DARWIN_C_SOURCE
+    -D_POSIX_PTHREAD_SEMANTICS
+    -D__STDC_WANT_IEC_60559_BFP_EXT__
+    -D__STDC_WANT_IEC_60559_DFP_EXT__
+    -D__STDC_WANT_IEC_60559_FUNCS_EXT__
+    -D__STDC_WANT_IEC_60559_TYPES_EXT__
+    -D__STDC_WANT_LIB_EXT2__
+    -D__STDC_WANT_MATH_SPEC_FUNCS__
+    -D_TANDEM_SOURCE)