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PAaudiooutput.C
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2005-03-12
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/*
ZynAddSubFX - a software synthesizer
PAaudiooutput.C - Audio output for PortAudio
Copyright (C) 2002 Nasca Octavian Paul
Author: Nasca Octavian Paul
This program is free software; you can redistribute it and/or modify
it under the terms of version 2 of the GNU General Public License
as published by the Free Software Foundation.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License (version 2) for more details.
You should have received a copy of the GNU General Public License (version 2)
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "PAaudiooutput.h"
Master *PAmaster;
PaStream *stream;
REALTYPE *outl,*outr;
int PAprocess(void *inputBuffer,void *outputBuffer,
unsigned long framesPerBuffer,
PaTimestamp outTime,void *userData){
if (framesPerBuffer!=SOUND_BUFFER_SIZE) {
fprintf(stderr,"Bug: PAudioOutput::PAprocess SOUND_BUFFER_SIZE!=framesPerBuffer");
fprintf(stderr,"%d %d\n",framesPerBuffer,SOUND_BUFFER_SIZE);
};
pthread_mutex_lock(&PAmaster->mutex);
PAmaster->GetAudioOutSamples(SOUND_BUFFER_SIZE,SAMPLE_RATE,outl,outr);
pthread_mutex_unlock(&PAmaster->mutex);
float *out=(float *)outputBuffer;
for (int i=0;i<framesPerBuffer;i++){
if (i>=SOUND_BUFFER_SIZE) break;//this should never happens, except only when framesPerBuffer!>SOUND_BUFFER_SIZE
out[i*2]=outl[i];
out[i*2+1]=outr[i];
};
return(0);
};
void PAaudiooutputinit(Master *master_){
PAmaster=master_;
outl=new REALTYPE [SOUND_BUFFER_SIZE];
outr=new REALTYPE [SOUND_BUFFER_SIZE];
Pa_Initialize();
Pa_OpenDefaultStream(&stream,0,2,paFloat32,SAMPLE_RATE,SOUND_BUFFER_SIZE,0,PAprocess,NULL);
Pa_StartStream(stream);
};
void PAfinish(){
Pa_StopStream(stream);
delete (outl);
delete (outr);
};