otomatalabs/furnace
8
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

add ability to preview wavetables

Browse source 
issue #16
This commit is contained in:
tildearrow 2022-01-20 00:07:53 -05:00
parent 85bb081f3b
commit 85dd6c3579
5 changed files with 96 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

45
src/engine/playback.cpp
View file

@ -1,4 +1,5 @@
#include "blip_buf.h"
#include "wavetable.h"
#define _USE_MATH_DEFINES
#include "dispatch.h"
#include "engine.h"
@ -938,7 +939,7 @@ void DivEngine::nextBuf(float** in, float** out, int inChans, int outChans, unsi
}
isBusy.lock();
if (out!=NULL && sPreview.sample>=0 && sPreview.sample<(int)song.sample.size()) {
if (out!=NULL && ((sPreview.sample>=0 && sPreview.sample<(int)song.sample.size()) || (sPreview.wave>=0 && sPreview.wave<(int)song.wave.size()))) {
unsigned int samp_bbOff=0;
unsigned int prevAvail=blip_samples_avail(samp_bb);
if (prevAvail>size) prevAvail=size;
@ -946,22 +947,38 @@ void DivEngine::nextBuf(float** in, float** out, int inChans, int outChans, unsi
blip_read_samples(samp_bb,samp_bbOut,prevAvail,0);
samp_bbOff=prevAvail;
}
DivSample* s=song.sample[sPreview.sample];
size_t prevtotal=blip_clocks_needed(samp_bb,size-prevAvail);
for (size_t i=0; i<prevtotal; i++) {
if (sPreview.pos>=s->rendLength) {
samp_temp=0;
} else {
samp_temp=s->rendData[sPreview.pos++];
}
if (s->depth==8) samp_temp<<=8;
blip_add_delta(samp_bb,i,samp_temp-samp_prevSample);
samp_prevSample=samp_temp;
}
if (sPreview.sample>=0 && sPreview.sample<(int)song.sample.size()) {
DivSample* s=song.sample[sPreview.sample];
if (sPreview.pos>=s->rendLength) sPreview.sample=-1;
for (size_t i=0; i<prevtotal; i++) {
if (sPreview.pos>=s->rendLength) {
samp_temp=0;
} else {
samp_temp=s->rendData[sPreview.pos++];
}
if (s->depth==8) samp_temp<<=8;
blip_add_delta(samp_bb,i,samp_temp-samp_prevSample);
samp_prevSample=samp_temp;
}
if (sPreview.pos>=s->rendLength) sPreview.sample=-1;
} else if (sPreview.wave>=0 && sPreview.wave<(int)song.wave.size()) {
DivWavetable* wave=song.wave[sPreview.wave];
for (size_t i=0; i<prevtotal; i++) {
if (wave->max<=0) {
samp_temp=0;
} else {
samp_temp=((MIN(wave->data[sPreview.pos],wave->max)<<14)/wave->max)-8192;
}
if (++sPreview.pos>=(unsigned int)wave->len) {
sPreview.pos=0;
}
blip_add_delta(samp_bb,i,samp_temp-samp_prevSample);
samp_prevSample=samp_temp;
}
}
blip_end_frame(samp_bb,prevtotal);
blip_read_samples(samp_bb,samp_bbOut+samp_bbOff,size-samp_bbOff,0);