OSStatus AUEffectBase::ProcessBufferLists(
AudioUnitRenderActionFlags & ioActionFlags,
const AudioBufferList & inBuffer,
AudioBufferList & outBuffer,
UInt32 inFramesToProcess )
{
if (ShouldBypassEffect())
return noErr;
// interleaved (or mono)
switch (mCommonPCMFormat) {
case CAStreamBasicDescription::kPCMFormatFloat32 :
ProcessBufferListsT<Float32>(ioActionFlags, inBuffer, outBuffer, inFramesToProcess);
break;
case CAStreamBasicDescription::kPCMFormatFixed824 :
ProcessBufferListsT<SInt32>(ioActionFlags, inBuffer, outBuffer, inFramesToProcess);
break;
case CAStreamBasicDescription::kPCMFormatInt16 :
ProcessBufferListsT<SInt16>(ioActionFlags, inBuffer, outBuffer, inFramesToProcess);
break;
default :
throw CAException(kAudio_UnimplementedError);
}
return noErr;
}
OSStatus AUEffectBase::Render( AudioUnitRenderActionFlags &ioActionFlags,
const AudioTimeStamp & inTimeStamp,
UInt32 nFrames)
{
if (!HasInput(0))
return kAudioUnitErr_NoConnection;
OSStatus result = noErr;
result = mMainInput->PullInput(ioActionFlags, inTimeStamp, 0 /* element */, nFrames);
if (result == noErr)
{
if(ProcessesInPlace() && mMainOutput->WillAllocateBuffer())
{
mMainOutput->SetBufferList(mMainInput->GetBufferList() );
}
if (ShouldBypassEffect())
{
// leave silence bit alone
if(!ProcessesInPlace() )
{
mMainInput->CopyBufferContentsTo (mMainOutput->GetBufferList());
}
}
else
{
if(mParamList.size() == 0 )
{
// this will read/write silence bit
result = ProcessBufferLists(ioActionFlags, mMainInput->GetBufferList(), mMainOutput->GetBufferList(), nFrames);
}
else
{
// deal with scheduled parameters...
AudioBufferList &inputBufferList = mMainInput->GetBufferList();
AudioBufferList &outputBufferList = mMainOutput->GetBufferList();
ScheduledProcessParams processParams;
processParams.actionFlags = &ioActionFlags;
processParams.inputBufferList = &inputBufferList;
processParams.outputBufferList = &outputBufferList;
// divide up the buffer into slices according to scheduled params then
// do the DSP for each slice (ProcessScheduledSlice() called for each slice)
result = ProcessForScheduledParams( mParamList,
nFrames,
&processParams );
// fixup the buffer pointers to how they were before we started
UInt32 channelSize = nFrames * mBytesPerFrame;
for(unsigned int i = 0; i < inputBufferList.mNumberBuffers; i++ ) {
UInt32 size = inputBufferList.mBuffers[i].mNumberChannels * channelSize;
inputBufferList.mBuffers[i].mData = (char *)inputBufferList.mBuffers[i].mData - size;
inputBufferList.mBuffers[i].mDataByteSize = size;
}
for(unsigned int i = 0; i < outputBufferList.mNumberBuffers; i++ ) {
UInt32 size = outputBufferList.mBuffers[i].mNumberChannels * channelSize;
outputBufferList.mBuffers[i].mData = (char *)outputBufferList.mBuffers[i].mData - size;
outputBufferList.mBuffers[i].mDataByteSize = size;
}
}
}
if ( (ioActionFlags & kAudioUnitRenderAction_OutputIsSilence) && !ProcessesInPlace() )
{
AUBufferList::ZeroBuffer(mMainOutput->GetBufferList() );
}
}
return result;
}
OSStatus Talkbox::Render(AudioUnitRenderActionFlags & ioActionFlags, const AudioTimeStamp & inTimeStamp, UInt32 inFramesToProcess)
{
if (! HasInput(0) )
{
//fprintf(stderr, "no input bus 0 connection\n");
return kAudioUnitErr_NoConnection;
}
OSStatus status = noErr;
AUOutputElement * theOutput = GetOutput(0); // throws if error
AUInputElement * theInput = GetInput(0);
status = theInput->PullInput(ioActionFlags, inTimeStamp, 0 /* element */, inFramesToProcess);
if (status != noErr)
return status;
if (status == noErr)
{
if ( ProcessesInPlace() )
{
theOutput->SetBufferList( theInput->GetBufferList() );
}
AUInputElement * theInput2 = NULL;
try
{
if ( HasInput(1) )
theInput2 = GetInput(1);
}
catch (...) { theInput2 = NULL; }
if (theInput2 != NULL)
{
bool mainInputSilentFlag = (ioActionFlags & kAudioUnitRenderAction_OutputIsSilence) ? true : false;
status = theInput2->PullInput(ioActionFlags, inTimeStamp, 1 /* element */, inFramesToProcess);
//if (result != noErr) fprintf(stderr, "PullInput(bus 1) error %ld\n", result);
if ( !mainInputSilentFlag && (ioActionFlags & kAudioUnitRenderAction_OutputIsSilence) )
ioActionFlags &= ~kAudioUnitRenderAction_OutputIsSilence;
}
else
{
status = kAudioUnitErr_NoConnection;
//fprintf(stderr, "could not access input bus 1 connection\n");
}
if ( ShouldBypassEffect() || (status != noErr) )
{
status = noErr;
// leave silence bit alone
if (! ProcessesInPlace() )
{
theInput->CopyBufferContentsTo( theOutput->GetBufferList() );
}
}
else
{
for (UInt32 i=0; i < numAllocatedChannels; i++)
{
dspKernels[i]->Process(theInput->GetChannelData(i),
theInput2->GetChannelData(i),
theOutput->GetChannelData(i),
inFramesToProcess);
}
}
}
return status;
}
