//This is the portaudio callback function, the audio is processed
//in the for loop.
int portAudio::paCallback( const void *inputBuffer, void *outputBuffer,
unsigned long framesPerBuffer,
const PaStreamCallbackTimeInfo* timeInfo,
PaStreamCallbackFlags statusFlags,
void *userData ) {
/* Cast data passed through stream to our structure. */
Buffer *theBuffer = (Buffer*)userData;
float *out = (float*)outputBuffer;
unsigned int i;
(void) inputBuffer; /* Prevent unused variable warning. */
//This is the audio data buffered from Pd. We get it in chunks of 64,
//since we are using stereo, the outbuf gets two chucks, or 128 numbers
libpd_process_double(1, theBuffer->inbuf, theBuffer->outbuf);
//dsp perform routine, channels are interlaced (e.g out[0] = left, out[1] = right, etc.)
for( i=0; i<framesPerBuffer*2; i++ )
{
if(i % 2)
*out++ = theBuffer->outbuf[i]; // right channel
else
*out++ = theBuffer->outbuf[i]; // left channel
}
return 0;
}
JNIEXPORT jint JNICALL Java_org_puredata_core_PdBase_process__I_3D_3D
(JNIEnv *env, jclass cls, jint ticks,
jdoubleArray inBuffer, jdoubleArray outBuffer) {
if (!inBuffer || !outBuffer) return -10;
double *pIn = (*env)->GetDoubleArrayElements(env, inBuffer, NULL);
double *pOut = (*env)->GetDoubleArrayElements(env, outBuffer, NULL);
pthread_mutex_lock(&mutex);
jint err = libpd_process_double((int) ticks, pIn, pOut);
pthread_mutex_unlock(&mutex);
(*env)->ReleaseDoubleArrayElements(env, inBuffer, pIn, 0);
(*env)->ReleaseDoubleArrayElements(env, outBuffer, pOut, 0);
return err;
}
bool PdBase::processDouble(int ticks, double* inBuffer, double* outBuffer) {
return libpd_process_double(ticks, inBuffer, outBuffer) == 0;
}
bool PdBase::processDouble(int ticks, const double* inBuffer, double* outBuffer) {
_LOCK();
bool ret = libpd_process_double(ticks, inBuffer, outBuffer) == 0;
_UNLOCK();
return ret;
}