[Stk] recording audio mac osx

[Caitlin Sadowski]

Hey,

I am attempting to write code which records 10 seconds (or else until  
the enter key is pressed) of audio in coming from a 24-bit Edirol   
and saves it as a WAV file. I have been using a callback function  
since I am working on Mac OSX (and the blocking audio classes seem to  
sometimes run into buffering problems on this OS).

The code I have written seems to work on my Macbook without the  
Edirol, but when I try to use it in on my other computer (PPC G5),  
with or without the Edirol, a file is recorded, but it is unplayable,  
appears to be formatted incorrectly somehow, and shows up as having 0  
channels. I am compiling the STK library files i reference in my  
program for both ppc and intel chips.

I am missing something? There is not too much to the code (and it is  
mostly based on the sample code from the tutorial) so I have included  
it below. Am I using RtAudio with callbacks correctly? Any other  
ideas on what is going wrong?

Thank you,

Caitlin Sadowski

static const Stk::StkFormat FILE_OUT_FORMAT = Stk::STK_SINT16;

int handleRead( void *outputBuffer, void *inputBuffer, unsigned int  
nBufferFrames,
				double streamTime, RtAudioStreamStatus status, void *outputFile )
{
	unsigned int i, j;
	StkFrames frame( 1, 2 );  //one frame with two channels
	StkFloat *buffer = (StkFloat *) inputBuffer;	
	FileWvOut *output = (FileWvOut *)outputFile;		
     for ( i=0; i<nBufferFrames; i++ ) {
		for ( j=0; j < NUMBER_OF_CHANNELS; j++ ) {
			frame (0, j) = *buffer;
			*buffer++;
		}
		output->tickFrame( frame );
     }			
	return 0;
}

int recToFileCallback  (string waveOutName, int length, int  
sampleRate) {
	
	Stk::showWarnings( true );
	StkFrames frame( 1, NUMBER_OF_CHANNELS );  //one frame with two  
channels
	Stk::setSampleRate( sampleRate );
	
	RtAudio adc;
     FileWvOut output;
	
	unsigned int bufferFrames = RT_BUFFER_SIZE; // sample frames, if we  
need to specifiy
	
	RtAudio::StreamParameters inParameters;
	inParameters.deviceId = adc.getDefaultInputDevice();
	inParameters.nChannels = 2;
	inParameters.firstChannel = 0;
	
	RtAudio::StreamOptions inOptions;	
	RtAudioFormat format = RTAUDIO_SINT24;		

	try {
		output.openFile (waveOutName, NUMBER_OF_CHANNELS,  
FileWrite::FILE_WAV, FILE_OUT_FORMAT);	
		adc.openStream( NULL, &inParameters, format, sampleRate,
				&bufferFrames, &handleRead, (void *)(&output), &inOptions );	   
			 					adc.startStream();
	}
	catch ( RtError& e ) {
		e.printMessage();
		exit( 0 );
	}
	char input;
	std::cout << "\nPlaying ... press <enter> to quit.\n";
	std::cin.get( input );	
	try {
		adc.stopStream();
	}
	catch (RtError& e) {
		e.printMessage();
	}	
	if ( adc.isStreamOpen() ) adc.closeStream();	
	output.closeFile();
	return 0;
}

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