// Overrides the method in SMACsdec. Necessary due to the way IMA works. This will not be necessary
// for many codecs.
void SMACIMAsdec::GetSourceData(SoundComponentData** outData)
{
// initialize the return value
*outData = NULL;
// stuff as many packets as we can into the decoder
UInt32 theError = 0;
void* theInputData = NULL;
UInt32 theInputDataByteSize = 0;
UInt32 theInputDataFrameSize = 0;
#if TARGET_API_MAC_OSX
bool threadLocked;
#endif
#if !(TARGET_MAC_OS && IS_COMPILER_WORKING)
UInt32 totalFloats;
#endif
#if TARGET_API_MAC_OSX
// Lock the thread. The last thing we want is to have our state change in the middle of
// a decode -- it will typically cause a crash
threadLocked = mThreadStateGuard->Lock();
#endif
// prime things with the current packet
GetCurrentInputPacket(theInputData, theInputDataByteSize, theInputDataFrameSize);
// Trying to mimic Decompressor.c in this case
if((theInputData == NULL) || (theInputDataFrameSize == 0 && theInputDataByteSize == 0) )
{
// silence with non-zero duration.
mOutputData.buffer = NULL;
*outData = mSourceData;
}
else
{
// On more complex decoders this isn't always necessary
if (!mDecoder)
{
mNumChannels = mOutputData.numChannels = mSourceData->numChannels;
mSampleRate = (mSourceData->sampleRate) >> 16;
CreateIMADecoder();
}
// loop and stuff the decoder with packets
bool isDone = false;
while((theInputData != NULL) && (theInputDataByteSize != 0) && (!isDone))
{
// give the current packet to the decoder
UInt32 theNumberInputPackets = 1;
UInt32 theNumberInputBytesConsumed = theInputDataByteSize;
AudioStreamPacketDescription theInputPacketDescription = { 0, 0, theInputDataByteSize };
theError = AudioCodecAppendInputData(mDecoder, theInputData, &theNumberInputBytesConsumed, &theNumberInputPackets, &theInputPacketDescription);
ThrowIfError(theError, (CAException)theError, "SMACIMAsdec::GetSourceData: got an error from AudioCodecAppendInputData");
// we know that the decoder is full if it ever says that it didn't take any data from the input buffer
if(theNumberInputBytesConsumed > 0 && theNumberInputBytesConsumed == theInputDataByteSize)
{
// consume the data the decoder used
ConsumeCurrentInputPacket(theInputDataByteSize, 0);
// get the next packet
GetCurrentInputPacket(theInputData, theInputDataByteSize, theInputDataFrameSize);
}
else if (theNumberInputBytesConsumed > 0)
{
ConsumeCurrentInputPacket(theNumberInputBytesConsumed, 0);
isDone = true;
}
else
{
isDone = true;
}
}
// the decoder is as full of data as we can make it at this time,
// so pull out 1 packet of output data
UInt32 theOutputDataByteSize = mPacketFrameSize * sizeof(float) * mOutputData.numChannels;
UInt32 theNumberOutputFrames = mPacketFrameSize;
UInt32 theDecoderStatus = kAudioCodecProduceOutputPacketFailure;
theError = AudioCodecProduceOutputPackets(mDecoder, mFloatBuffer, &theOutputDataByteSize, &theNumberOutputFrames, NULL, &theDecoderStatus);
ThrowIfError(theError, (CAException)theError, "SMACIMAsdec::GetSourceData: got an error from AudioCodecProduceOutputPackets");
// set up the return values if we got a packet back from the decoder
if(theNumberOutputFrames)
{
// gcc 2.95 doesn't work right in this case, so we guard against it
#if TARGET_MAC_OS && IS_COMPILER_WORKING
Float32ToNativeInt16(mHasAltiVec, mFloatBuffer, ((short *)mOutputBuffer), theOutputDataByteSize >> 2);
#else
totalFloats = theOutputDataByteSize >> 2;
for (unsigned int i = 0; i < totalFloats; i++)
{
((short *)mOutputBuffer)[i] = (SInt16)(32768.0 * mFloatBuffer[i]);
}
#endif
mOutputData.buffer = mOutputBuffer;
if (mOutputData.numChannels == 2) // It's either 1 or 2 here in SMAC land
{
mOutputData.sampleCount = (theOutputDataByteSize >> 3); // Yes, these really are frames.
}
else
{
void SMACsdec::GetSourceData(SoundComponentData** outData)
{
// initialize the return value
*outData = NULL;
// stuff as many packets as we can into the decoder
UInt32 theError = 0;
void* theInputData = NULL;
UInt32 theInputDataByteSize = 0;
UInt32 theInputDataFrameSize = 0;
#if TARGET_API_MAC_OSX
bool threadLocked;
#endif
#if !(TARGET_MAC_OS && IS_COMPILER_WORKING)
UInt32 totalFloats;
#endif
#if TARGET_API_MAC_OSX
// Lock the thread. The last thing we want is to have our state change in the middle of
// a decode -- it will typically cause a crash
threadLocked = mThreadStateMutex->Lock();
#endif
// prime things with the current packet
GetCurrentInputPacket(theInputData, theInputDataByteSize, theInputDataFrameSize);
// Trying to mimic Decompressor.c in this case
if((theInputData == NULL) || (theInputDataFrameSize == 0 && theInputDataByteSize == 0) )
{
// silence with non-zero duration.
mOutputData.buffer = NULL;
*outData = mSourceData;
}
else
{
// loop and stuff the decoder with packets
bool isDone = false;
while((theInputData != NULL) && (theInputDataByteSize != 0) && (!isDone))
{
// give the current packet to the decoder
UInt32 theNumberInputPackets = 1;
UInt32 theNumberInputBytesConsumed = theInputDataByteSize;
AudioStreamPacketDescription theInputPacketDescription = { 0, 0, theInputDataByteSize };
theError = AudioCodecAppendInputData(mDecoder, theInputData, &theNumberInputBytesConsumed, &theNumberInputPackets, &theInputPacketDescription);
//printf("mDecoder == %lu, Appended %ld bytes in %ld packets\n", (UInt32)(&mDecoder), theNumberInputBytesConsumed, theNumberInputPackets);
ThrowIfError(theError, (CAException)theError, "SMACsdec::GetSourceData: got an error from AudioCodecAppendInputData");
// we know that the decoder is full if it ever says that it didn't take any data from the input buffer
if( (theNumberInputBytesConsumed > 0) && (theNumberInputBytesConsumed == theInputDataByteSize) )
{
// consume the data the decoder used
ConsumeCurrentInputPacket(theInputDataByteSize, 0);
// get the next packet
GetCurrentInputPacket(theInputData, theInputDataByteSize, theInputDataFrameSize);
}
else if (theNumberInputBytesConsumed > 0)
{
ConsumeCurrentInputPacket(theNumberInputBytesConsumed, 0);
isDone = true;
}
else
{
isDone = true;
}
}
// the decoder is as full of data as we can make it at this time,
// so pull out 1 packet of output data
UInt32 theOutputDataByteSize = mPacketFrameSize * sizeof(float) * mOutputData.numChannels;
UInt32 theNumberOutputFrames = mPacketFrameSize;
UInt32 theDecoderStatus = kAudioCodecProduceOutputPacketFailure;
theError = AudioCodecProduceOutputPackets(mDecoder, mFloatBuffer, &theOutputDataByteSize, &theNumberOutputFrames, NULL, &theDecoderStatus);
//printf (" theNumberOutputFrames == %ld\n",theNumberOutputFrames);
ThrowIfError(theError, (CAException)theError, "SMACsdec::GetSourceData: got an error from AudioCodecProduceOutputPackets");
// set up the return values if we got a packet back from the decoder
if(theNumberOutputFrames)
{
//theNumberOutputFrames = theOutputDataByteSize / mOutputData.numChannels / sizeof(float);
// ThrowIfError(theNumberOutputFrames != theOutputDataByteSize / mOutputData.numChannels / sizeof(float), "SMACsdec::GetSourceData: got an error from AudioCodecProduceOutputPackets");
#if TARGET_MAC_OS && IS_COMPILER_WORKING
Float32ToNativeInt16(mHasAltiVec, mFloatBuffer, ((short *)mOutputBuffer), theOutputDataByteSize >> 2);
#else
totalFloats = theOutputDataByteSize >> 2;
for (unsigned int i = 0; i < totalFloats; i++)
{
((short *)mOutputBuffer)[i] = (SInt16)(32768.0 * mFloatBuffer[i]);
}
#endif
mOutputData.buffer = mOutputBuffer;
if (mOutputData.numChannels == 2) // It's either 1 or 2 here in SMAC land
{
mOutputData.sampleCount = (theOutputDataByteSize >> 3); // These really are frames. It's a QuickTime/SoundManager ism
}
else
{
mOutputData.sampleCount = (theOutputDataByteSize >> 2);
}
*outData = &mOutputData;
#if CaptureDataToFile
if(mOutputFileRefNum != -1)
{
UInt32 theActualBytesWritten = 0;
FSWriteFork(mOutputFileRefNum, fsAtMark, 0, theOutputDataByteSize, mOutputBuffer, &theActualBytesWritten);
}
#endif
}
