Portaudio Test

Portaudio.c

int audio_interface_play_sound(int channels, int sample_rate, int len, uint16_t* data)
{
	PaStream* stream;
	PaError err = Pa_OpenDefaultStream(&stream, 0, 1, paInt16, sample_rate, 256, audio_interface_callback, data);
	
	if(err != paNoError) 
	{
		fprintf(stderr, "stdgfx: error opening audio stream %s\n", Pa_GetErrorText(err));
		return -1;
	}
	return audio_interface_add_sound(stream, channels, sample_rate, len, data);
}

static int audio_interface_callback( const void *inputBuffer, void *outputBuffer,
                           unsigned long framesPerBuffer,
                           const PaStreamCallbackTimeInfo* timeInfo,
                           PaStreamCallbackFlags statusFlags,
                           void *userData )
{
	uint16_t* out = (uint16_t*)outputBuffer;
	uint16_t* data = (uint16_t*)((uintptr_t)userData + test_len*sizeof(uint16_t));
  // Pass data to the output buffer??
	for(int i = 0; i < framesPerBuffer; i++)
	{
		*out++ = *data++;
		test_len++;
	}
	return 0;
}