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;
}
