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fix audio problems in SDL audio backend

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this was a Furnace bug
issue #2503
This commit is contained in:
tildearrow 2025-05-12 17:23:25 -05:00
parent 3ce445e96e
commit 4fc278eb46
1 changed files with 22 additions and 2 deletions
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24
src/audio/sdlAudio.cpp
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@ -27,16 +27,36 @@ void taSDLProcess(void* inst, unsigned char* buf, int nframes) {
} }
void TAAudioSDL::onProcess(unsigned char* buf, int nframes) { void TAAudioSDL::onProcess(unsigned char* buf, int nframes) {
unsigned int unframes=nframes/(sizeof(float)*desc.outChans);
if (nframes<0) {
logE("nframes is negative! (%d)",nframes);
return;
}
for (int i=0; i<desc.inChans; i++) {
if (unframes>desc.bufsize) {
delete[] inBufs[i];
inBufs[i]=new float[unframes];
}
}
for (int i=0; i<desc.outChans; i++) {
if (unframes>desc.bufsize) {
delete[] outBufs[i];
outBufs[i]=new float[unframes];
}
}
if (audioProcCallback!=NULL) { if (audioProcCallback!=NULL) {
if (midiIn!=NULL) midiIn->gather(); if (midiIn!=NULL) midiIn->gather();
audioProcCallback(audioProcCallbackUser,inBufs,outBufs,desc.inChans,desc.outChans,desc.bufsize); audioProcCallback(audioProcCallbackUser,inBufs,outBufs,desc.inChans,desc.outChans,unframes);
} }
float* fbuf=(float*)buf; float* fbuf=(float*)buf;
for (size_t j=0; j<desc.bufsize; j++) { for (size_t j=0; j<unframes; j++) {
for (size_t i=0; i<desc.outChans; i++) { for (size_t i=0; i<desc.outChans; i++) {
fbuf[j*desc.outChans+i]=outBufs[i][j]; fbuf[j*desc.outChans+i]=outBufs[i][j];
} }
} }
if (unframes!=desc.bufsize) {
desc.bufsize=unframes;
}
} }
void* TAAudioSDL::getContext() { void* TAAudioSDL::getContext() {