86 lines
1.7 KiB
C++
86 lines
1.7 KiB
C++
#include <string.h>
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#include "sdl.h"
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void taSDLProcess(void* inst, unsigned char* buf, int nframes) {
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TAAudioSDL* in=(TAAudioSDL*)inst;
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in->onProcess(buf,nframes);
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}
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void TAAudioSDL::onProcess(unsigned char* buf, int nframes) {
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if (audioProcCallback!=NULL) {
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audioProcCallback(inBufs,outBufs,desc.inChans,desc.outChans,desc.bufsize);
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}
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float* fbuf=(float*)buf;
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for (size_t j=0; j<desc.bufsize; j++) {
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for (size_t i=0; i<desc.outChans; i++) {
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fbuf[j*desc.outChans+i]=outBufs[i][j];
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}
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}
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}
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void* TAAudioSDL::getContext() {
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return (void*)∾
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}
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bool TAAudioSDL::quit() {
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if (!initialized) return false;
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SDL_CloseAudioDevice(ai);
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if (running) {
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running=false;
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}
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for (int i=0; i<desc.outChans; i++) {
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delete[] outBufs[i];
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}
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delete[] outBufs;
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initialized=false;
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return true;
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}
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bool TAAudioSDL::setRun(bool run) {
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if (!initialized) return false;
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SDL_PauseAudioDevice(ai,!run);
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running=run;
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return running;
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}
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bool TAAudioSDL::init(TAAudioDesc& request, TAAudioDesc& response) {
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if (initialized) return false;
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if (SDL_Init(SDL_INIT_AUDIO)<0) return false;
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desc=request;
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desc.outFormat=TA_AUDIO_FORMAT_F32;
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ac.freq=desc.rate;
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ac.format=AUDIO_F32;
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ac.channels=desc.outChans;
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ac.samples=desc.bufsize;
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ac.callback=taSDLProcess;
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ac.userdata=this;
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ai=SDL_OpenAudioDevice(NULL,0,&ac,&ar,SDL_AUDIO_ALLOW_FREQUENCY_CHANGE);
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if (ai==0) return false;
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desc.name="";
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desc.rate=ar.freq;
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desc.inChans=0;
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desc.outChans=ar.channels;
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desc.bufsize=ar.samples;
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desc.fragments=1;
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if (desc.outChans>0) {
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outBufs=new float*[desc.outChans];
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for (int i=0; i<desc.outChans; i++) {
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outBufs[i]=new float[desc.bufsize];
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}
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}
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response=desc;
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initialized=true;
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return true;
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}
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