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add a metronome

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This commit is contained in:
tildearrow 2022-01-04 00:02:41 -05:00
parent 943e4e374f
commit 530a9bafc7
4 changed files with 66 additions and 0 deletions
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35
src/engine/playback.cpp
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@ -882,6 +882,14 @@ void DivEngine::nextBuf(float** in, float** out, int inChans, int outChans, unsi
bbInLen=runtotal+256;
}
if (metroTickLen<size) {
if (metroTick!=NULL) delete[] metroTick;
metroTick=new unsigned char[size];
metroTickLen=size;
}
memset(metroTick,0,size);
size_t runLeft=runtotal;
size_t runPos=0;
totalProcessed=0;
@ -895,6 +903,14 @@ void DivEngine::nextBuf(float** in, float** out, int inChans, int outChans, unsi
runLeft-=cycles;
dispatch->acquire(bbIn[0],bbIn[1],runPos,cycles);
runPos+=cycles;
unsigned int realPos=(runPos*size)/runtotal;
if (realPos>=size) realPos=size-1;
if (song.hilightA>0) {
if ((curRow%song.hilightA)==0 && ticks==1) metroTick[realPos]=1;
}
if (song.hilightB>0) {
if ((curRow%song.hilightB)==0 && ticks==1) metroTick[realPos]=2;
}
if (nextTick()) {
if (remainingLoops>0) {
remainingLoops--;
@ -947,5 +963,24 @@ void DivEngine::nextBuf(float** in, float** out, int inChans, int outChans, unsi
out[1][i]+=(float)bbOut[0][i]/16384.0;
}
}
if (metronome) for (size_t i=0; i<size; i++) {
if (metroTick[i]) {
if (metroTick[i]==2) {
metroPeriod=30;
} else {
metroPeriod=40;
}
metroPos=metroPeriod;
metroAmp=0.5f;
}
out[0][i]+=(metroPos>(metroPeriod>>1))*metroAmp;
out[1][i]+=(metroPos>(metroPeriod>>1))*metroAmp;
metroAmp-=0.0002f;
if (metroAmp<0.0f) metroAmp=0.0f;
if (--metroPos<=0) {
metroPos=metroPeriod;
}
}
isBusy.unlock();
}