Engine directory for ticket #1

2026-02-13 03:33:48 +00:00 · 2012-09-19 11:15:01 -04:00 · 2012-09-19 11:15:01 -04:00 · 7dbfe6994d
commit 7dbfe6994d
parent 352279af7a
3795 changed files with 1363358 additions and 0 deletions
--- a/Engine/source/sfx/sfxMemoryStream.cpp
+++ b/Engine/source/sfx/sfxMemoryStream.cpp
@ -0,0 +1,117 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) 2012 GarageGames, LLC
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//-----------------------------------------------------------------------------
+
+#include "sfx/sfxMemoryStream.h"
+#include "platform/typetraits.h"
+#include "console/console.h"
+
+
+SFXMemoryStream::SFXMemoryStream( const SFXFormat& format,
+                                  SourceStreamType* stream,
+                                  U32 numSamples )
+   : IInputStreamFilter< U8, SourceStreamType* >( stream ),
+     mFormat( format ),
+     mNumSamplesTotal( numSamples ),
+     mNumSamplesLeft( numSamples ),
+     mCurrentPacket( NULL ),
+     mCurrentPacketOffset( 0 )
+{
+}
+
+void SFXMemoryStream::reset()
+{
+   if( dynamic_cast< IResettable* >( getSourceStream() ) )
+   {
+      reinterpret_cast< IResettable* >( getSourceStream() )->reset();
+      
+      if( mCurrentPacket )
+         destructSingle( mCurrentPacket );
+         
+      mCurrentPacket = NULL;
+      mCurrentPacketOffset = 0;
+      mNumSamplesLeft = mNumSamplesTotal;
+   }
+   else
+      Con::errorf( "SFXMemoryStream - cannot reset source stream" );
+}
+
+U32 SFXMemoryStream::read( U8* buffer, U32 length )
+{
+   U32 bufferOffset = 0;
+   
+   // Determine how much we're supposed to read.
+   
+   U32 numBytesToCopy = length;
+   if( mNumSamplesLeft != U32_MAX )
+      numBytesToCopy = getMin( length, mNumSamplesLeft * mFormat.getBytesPerSample() );
+   numBytesToCopy -= numBytesToCopy % mFormat.getBytesPerSample();
+      
+   // Copy the data.
+   
+   U32 numBytesLeftToCopy = numBytesToCopy;
+   while( numBytesLeftToCopy )
+   {
+      // If we have a current packet, use its data.
+      
+      if( mCurrentPacket )
+      {
+         U32 numBytesLeftInCurrentPacket = mCurrentPacket->size - mCurrentPacketOffset;
+         
+         // Copy data.
+         
+         if( numBytesLeftInCurrentPacket )
+         {
+            const U32 numBytesToCopy = getMin( numBytesLeftInCurrentPacket, numBytesLeftToCopy );
+            dMemcpy( &buffer[ bufferOffset ], &mCurrentPacket->data[ mCurrentPacketOffset ], numBytesToCopy );
+            
+            bufferOffset                  += numBytesToCopy;
+            mCurrentPacketOffset          += numBytesToCopy;
+            numBytesLeftInCurrentPacket   -= numBytesToCopy;
+            numBytesLeftToCopy            -= numBytesToCopy;
+         }
+         
+         // Discard the packet if there's no data left.
+         
+         if( !numBytesLeftInCurrentPacket )
+         {
+            destructSingle( mCurrentPacket );
+            mCurrentPacket = NULL;
+            mCurrentPacketOffset = 0;
+         }
+      }
+      else
+      {
+         // Read a new packet.
+         
+         if( !getSourceStream()->read( &mCurrentPacket, 1 ) )
+            break;
+      }
+   }
+   
+   // Update count of remaining samples.
+   
+   U32 numBytesCopied = numBytesToCopy - numBytesLeftToCopy;
+   if( mNumSamplesLeft != U32_MAX )
+      mNumSamplesLeft -= ( numBytesCopied / mFormat.getBytesPerSample() );
+      
+   return numBytesCopied;
+}