void SMACscom::SetInfo(SoundSource inSourceID, OSType inSelector, void* inData)
{
switch(inSelector)
{
case siCompressionParams:
{
// process the the new params and produce an initialized
// AudioCodec instance
ComponentInstance theEncoder = SetCompressionParams(inData);
ThrowIf(theEncoder == NULL, badFormat, "SMACscom::SetInfo: siCompressionParams didn't generate an encoder");
// get rid of the input data
mSourceData = NULL;
mOutputData.desc.sampleCount = 0;
mOutputData.bufferSize = 0;
mOutputData.frameCount = 0;
mOutputData.commonFrameSize = 0;
// close the old encoder if necessary
if((mEncoder != NULL) && (theEncoder != mEncoder))
{
CloseComponent(mEncoder);
}
// use the new one
mEncoder = theEncoder;
// get the number of frames in 1 packet of data
UInt32 theSize = sizeof(UInt32);
ComponentResult theError = AudioCodecGetProperty(mEncoder, kAudioCodecPropertyPacketFrameSize, &theSize, &mPacketFrameSize);
ThrowIfError(theError, (CAException)theError, "SMACscom::SetInfo: siCompressionParams got an error from AudioCodecGetProperty while getting the packet frame size");
// get the maximum number of bytes in 1 packet of data
theSize = sizeof(UInt32);
theError = AudioCodecGetProperty(mEncoder, kAudioCodecPropertyMaximumPacketByteSize, &theSize, &mMaxPacketByteSize);
ThrowIfError(theError, (CAException)theError, "SMACscom::SetInfo: siCompressionParams got an error from AudioCodecGetProperty while getting the maximum packet byte size");
// toss the old output buffer
delete[] mOutputBuffer;
// allocate enough space for 1 packet of data, since that's
// that's all this component will produce per call to GetSourceData
mOutputBuffer = new Byte[mMaxPacketByteSize];
}
break;
case siSourceIsExhausted:
// in this case it seems to be passed by value -- ugh!
mSourceIsExhausted = (Boolean)((UInt32)inData);
// Now pass this on, so no break!
default:
ThrowIf(mSourceComponent == NULL, siUnknownInfoType, "SMACscom::SetInfo: no source to pass request to")
ComponentResult theError = SoundComponentSetInfo(mSourceComponent, inSourceID, inSelector, inData);
ThrowIfError(theError, (CAException)theError, "SMACscom::SetInfo: got an error from SoundComponentSetInfo");
break;
};
}
ComponentInstance SMACIMAsdec::InitializeIMAAudioDecoder(Component inDecoderComponent, const AudioStreamBasicDescription& inFormat)
{
UInt32 theSize;
ComponentInstance theDecoder = OpenComponent(inDecoderComponent);
ThrowIf(theDecoder == NULL, badComponentInstance, "SMACIMAsdec::InitializeIMAAudioDecoder: couldn't open the component");
// first, give the decoder the info we have
theSize = sizeof(AudioStreamBasicDescription);
ComponentResult theError = AudioCodecSetProperty(theDecoder, kAudioCodecPropertyCurrentInputFormat, theSize, &inFormat);
ThrowIfError(theError, (CAException)theError, "SMACIMAsdec::InitializeIMAAudioDecoder: got an error setting the input format");
// now find out what it can output
theError = AudioCodecGetPropertyInfo(theDecoder, kAudioCodecPropertySupportedOutputFormats, &theSize, NULL);
ThrowIfError(theError, (CAException)theError, "SMACIMAsdec::InitializeIMAAudioDecoder: got an error getting the available output format list size");
UInt32 theNumberAvailableOutputFormats = theSize / sizeof(AudioStreamBasicDescription);
AudioStreamBasicDescription* theAvailableOutputFormats = new AudioStreamBasicDescription[theNumberAvailableOutputFormats];
try
{
theSize = theNumberAvailableOutputFormats * sizeof(AudioStreamBasicDescription);
theError = AudioCodecGetProperty(theDecoder, kAudioCodecPropertySupportedOutputFormats, &theSize, theAvailableOutputFormats);
ThrowIfError(theError, (CAException)theError, "SMACIMAsdec::InitializeIMAAudioDecoder: got an error getting the available output formats");
// find an acceptable output format
AudioStreamBasicDescription* theOutputFormat = FindNEFloatFormat(theAvailableOutputFormats, theNumberAvailableOutputFormats);
ThrowIf(theOutputFormat == NULL, badFormat, "SMACIMAsdec::InitializeIMAAudioDecoder: couldn't find an acceptable output format");
// finish filling out the output format
theOutputFormat->mSampleRate = inFormat.mSampleRate;
theOutputFormat->mChannelsPerFrame = inFormat.mChannelsPerFrame;
theOutputFormat->mBytesPerFrame = 4 * inFormat.mChannelsPerFrame;
theOutputFormat->mFormatID = kAudioFormatLinearPCM;
theOutputFormat->mFormatFlags = kAudioFormatFlagsNativeFloatPacked;
theOutputFormat->mBytesPerPacket = 4 * inFormat.mChannelsPerFrame;
theOutputFormat->mFramesPerPacket = 1;
theOutputFormat->mBitsPerChannel = 32;
// tell the decoder about it
theSize = sizeof(AudioStreamBasicDescription);
theError = AudioCodecSetProperty(theDecoder, kAudioCodecPropertyCurrentOutputFormat, theSize, theOutputFormat);
ThrowIfError(theError, (CAException)theError, "SMACIMAsdec::InitializeIMAAudioDecoder: got an error setting the output format");
delete[] theAvailableOutputFormats;
theAvailableOutputFormats = NULL;
}
catch(...)
{
delete[] theAvailableOutputFormats;
throw;
}
// finally initialize the decoder
theError = AudioCodecInitialize(theDecoder, NULL, NULL, NULL, 0);
ThrowIfError(theError, (CAException)theError, "SMACIMAsdec::InitializeIMAAudioDecoder: got an error initializing the decoder");
return theDecoder;
}
void SMACsdec::SetInfo(SoundSource inSourceID, OSType inSelector, void* inData)
{
switch(inSelector)
{
case siDecompressionParams:
{
#if TARGET_API_MAC_OSX
// Lock the thread if we can as we are going to completely replace the decoder
bool threadLocked;
threadLocked = mThreadStateMutex->Lock();
#endif
// process the the new params and produce an initialized
// AudioCodec instance
ComponentInstance theDecoder = SetDecompressionParams(inData);
ThrowIf(theDecoder == NULL, badFormat, "SMACsdec::SetInfo: siDecompressionParams didn't generate a decoder");
// get rid of the input data
mSourceData = NULL;
mOutputData.sampleCount = 0;
// close the old decoder if necessary
if((mDecoder != NULL) && (theDecoder != mDecoder))
{
#if USE_DIRECT_ADEC
DirectAudioCodecClose(mDecoder);
#else
CloseComponent(mDecoder);
#endif
}
// use the new one
mDecoder = theDecoder;
// get the number of frames in 1 packet of data
UInt32 theSize = sizeof(UInt32);
ComponentResult theError = AudioCodecGetProperty(mDecoder, kAudioCodecPropertyPacketFrameSize, &theSize, &mPacketFrameSize);
ThrowIfError(theError, (CAException)theError, "SMACsdec::SetInfo: siDecompressionParams got an error from AudioCodecGetProperty");
// toss the old output buffer
delete[] mOutputBuffer;
delete[] mFloatBuffer;
// allocate enough space for 1 packet of data, since that's
// that's all this component will produce per call to GetSourceData
// note that this is going to be 16 bit integer
mOutputBuffer = new Byte[mPacketFrameSize * 2 * mOutputData.numChannels];
mFloatBuffer = new float[mPacketFrameSize * mOutputData.numChannels];
#if TARGET_API_MAC_OSX
// If we need to, unlock the thread
if(threadLocked)
{
mThreadStateMutex->Unlock();
}
#endif
}
break;
default:
ThrowIf(mSourceComponent == NULL, siUnknownInfoType, "SMACsdec::SetInfo: no source to pass request to")
ComponentResult theError = SoundComponentSetInfo(mSourceComponent, inSourceID, inSelector, inData);
throw theError;
break;
};
}
