otomatalabs/furnace
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add a sample preview button (hopefully)

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the next commit will be about normalizing sample rate
This commit is contained in:
tildearrow 2021-12-21 13:06:14 -05:00
parent 6ee4e33b89
commit 48f4f5835b
4 changed files with 82 additions and 11 deletions
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40
src/engine/playback.cpp
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@ -802,9 +802,36 @@ bool DivEngine::nextTick(bool noAccum) {
}
void DivEngine::nextBuf(float** in, float** out, int inChans, int outChans, unsigned int size) {
memset(out[0],0,size*sizeof(float));
memset(out[1],0,size*sizeof(float));
isBusy.lock();
if (sPreview.sample>=0 && sPreview.sample<(int)song.sample.size()) {
DivSample* s=song.sample[sPreview.sample];
size_t prevtotal=blip_clocks_needed(bb[2],size);
for (size_t i=0; i<prevtotal; i++) {
if (sPreview.pos>=s->rendLength) {
temp[2]=0;
} else {
temp[2]=s->rendData[sPreview.pos++];
}
blip_add_delta(bb[2],i,temp[2]-prevSample[2]);
prevSample[2]=temp[2];
}
if (sPreview.pos>=s->rendLength) sPreview.sample=-1;
blip_end_frame(bb[2],prevtotal);
blip_read_samples(bb[2],bbOut[2],size,0);
for (size_t i=0; i<size; i++) {
out[0][i]+=(float)bbOut[2][i]/32768.0;
out[1][i]+=(float)bbOut[2][i]/32768.0;
}
}
if (!playing || dispatch==NULL) {
memset(out[0],0,size*sizeof(float));
memset(out[1],0,size*sizeof(float));
isBusy.unlock();
return;
}
size_t runtotal=blip_clocks_needed(bb[0],size);
@ -820,7 +847,6 @@ void DivEngine::nextBuf(float** in, float** out, int inChans, int outChans, unsi
size_t runLeft=runtotal;
size_t runPos=0;
totalProcessed=0;
isBusy.lock();
while (runLeft) {
if (!remainingLoops) {
memset(bbIn[0]+runPos,0,runLeft*sizeof(short));
@ -874,13 +900,13 @@ void DivEngine::nextBuf(float** in, float** out, int inChans, int outChans, unsi
if (dispatch->isStereo()) {
for (size_t i=0; i<size; i++) {
out[0][i]=(float)bbOut[0][i]/16384.0;
out[1][i]=(float)bbOut[1][i]/16384.0;
out[0][i]+=(float)bbOut[0][i]/16384.0;
out[1][i]+=(float)bbOut[1][i]/16384.0;
}
} else {
for (size_t i=0; i<size; i++) {
out[0][i]=(float)bbOut[0][i]/16384.0;
out[1][i]=(float)bbOut[0][i]/16384.0;
out[0][i]+=(float)bbOut[0][i]/16384.0;
out[1][i]+=(float)bbOut[0][i]/16384.0;
}
}
isBusy.unlock();