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furnace/src/engine/wavOps.cpp
tildearrow 717e75f82d add setting to disable DC offset correction
2023-10-29 15:25:23 -05:00

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/**
* Furnace Tracker - multi-system chiptune tracker
* Copyright (C) 2021-2023 tildearrow and contributors
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "engine.h"
#include "../ta-log.h"
#ifdef HAVE_SNDFILE
#include "sfWrapper.h"
#endif
#define EXPORT_BUFSIZE 2048
void _runExportThread(DivEngine* caller) {
caller->runExportThread();
}
bool DivEngine::isExporting() {
return exporting;
}
#ifdef HAVE_SNDFILE
void DivEngine::runExportThread() {
size_t fadeOutSamples=got.rate*exportFadeOut;
size_t curFadeOutSample=0;
bool isFadingOut=false;
switch (exportMode) {
case DIV_EXPORT_MODE_ONE: {
SNDFILE* sf;
SF_INFO si;
SFWrapper sfWrap;
si.samplerate=got.rate;
si.channels=2;
si.format=SF_FORMAT_WAV|SF_FORMAT_PCM_16;
sf=sfWrap.doOpen(exportPath.c_str(),SFM_WRITE,&si);
if (sf==NULL) {
logE("could not open file for writing! (%s)",sf_strerror(NULL));
exporting=false;
return;
}
float* outBuf[3];
outBuf[0]=new float[EXPORT_BUFSIZE];
outBuf[1]=new float[EXPORT_BUFSIZE];
outBuf[2]=new float[EXPORT_BUFSIZE*2];
// take control of audio output
deinitAudioBackend();
playSub(false);
logI("rendering to file...");
while (playing) {
size_t total=0;
nextBuf(NULL,outBuf,0,2,EXPORT_BUFSIZE);
if (totalProcessed>EXPORT_BUFSIZE) {
logE("error: total processed is bigger than export bufsize! %d>%d",totalProcessed,EXPORT_BUFSIZE);
totalProcessed=EXPORT_BUFSIZE;
}
for (int i=0; i<(int)totalProcessed; i++) {
total++;
if (isFadingOut) {
double mul=(1.0-((double)curFadeOutSample/(double)fadeOutSamples));
outBuf[2][i<<1]=MAX(-1.0f,MIN(1.0f,outBuf[0][i]))*mul;
outBuf[2][1+(i<<1)]=MAX(-1.0f,MIN(1.0f,outBuf[1][i]))*mul;
if (++curFadeOutSample>=fadeOutSamples) {
playing=false;
break;
}
} else {
outBuf[2][i<<1]=MAX(-1.0f,MIN(1.0f,outBuf[0][i]));
outBuf[2][1+(i<<1)]=MAX(-1.0f,MIN(1.0f,outBuf[1][i]));
if (lastLoopPos>-1 && i>=lastLoopPos && totalLoops>=exportLoopCount) {
logD("start fading out...");
isFadingOut=true;
if (fadeOutSamples==0) break;
}
}
}
if (sf_writef_float(sf,outBuf[2],total)!=(int)total) {
logE("error: failed to write entire buffer!");
break;
}
}
delete[] outBuf[0];
delete[] outBuf[1];
delete[] outBuf[2];
if (sfWrap.doClose()!=0) {
logE("could not close audio file!");
}
if (initAudioBackend()) {
for (int i=0; i<song.systemLen; i++) {
disCont[i].setRates(got.rate);
disCont[i].setQuality(lowQuality,dcHiPass);
}
if (!output->setRun(true)) {
logE("error while activating audio!");
}
}
logI("done!");
exporting=false;
break;
}
case DIV_EXPORT_MODE_MANY_SYS: {
SNDFILE* sf[DIV_MAX_CHIPS];
SF_INFO si[DIV_MAX_CHIPS];
String fname[DIV_MAX_CHIPS];
SFWrapper sfWrap[DIV_MAX_CHIPS];
for (int i=0; i<song.systemLen; i++) {
sf[i]=NULL;
si[i].samplerate=got.rate;
si[i].channels=disCont[i].dispatch->getOutputCount();
si[i].format=SF_FORMAT_WAV|SF_FORMAT_PCM_16;
}
for (int i=0; i<song.systemLen; i++) {
fname[i]=fmt::sprintf("%s_s%02d.wav",exportPath,i+1);
logI("- %s",fname[i].c_str());
sf[i]=sfWrap[i].doOpen(fname[i].c_str(),SFM_WRITE,&si[i]);
if (sf[i]==NULL) {
logE("could not open file for writing! (%s)",sf_strerror(NULL));
for (int j=0; j<i; j++) {
sfWrap[i].doClose();
}
return;
}
}
float* outBuf[DIV_MAX_OUTPUTS];
memset(outBuf,0,sizeof(void*)*DIV_MAX_OUTPUTS);
outBuf[0]=new float[EXPORT_BUFSIZE];
outBuf[1]=new float[EXPORT_BUFSIZE];
short* sysBuf[DIV_MAX_CHIPS];
for (int i=0; i<song.systemLen; i++) {
sysBuf[i]=new short[EXPORT_BUFSIZE*disCont[i].dispatch->getOutputCount()];
}
// take control of audio output
deinitAudioBackend();
playSub(false);
logI("rendering to files...");
while (playing) {
size_t total=0;
nextBuf(NULL,outBuf,0,2,EXPORT_BUFSIZE);
if (totalProcessed>EXPORT_BUFSIZE) {
logE("error: total processed is bigger than export bufsize! %d>%d",totalProcessed,EXPORT_BUFSIZE);
totalProcessed=EXPORT_BUFSIZE;
}
for (int j=0; j<(int)totalProcessed; j++) {
total++;
if (isFadingOut) {
double mul=(1.0-((double)curFadeOutSample/(double)fadeOutSamples));
for (int i=0; i<song.systemLen; i++) {
for (int k=0; k<si[i].channels; k++) {
if (disCont[i].bbOut[k]==NULL) {
sysBuf[i][k+(j*si[i].channels)]=0;
} else {
sysBuf[i][k+(j*si[i].channels)]=(double)disCont[i].bbOut[k][j]*mul;
}
}
}
if (++curFadeOutSample>=fadeOutSamples) {
playing=false;
break;
}
} else {
for (int i=0; i<song.systemLen; i++) {
for (int k=0; k<si[i].channels; k++) {
if (disCont[i].bbOut[k]==NULL) {
sysBuf[i][k+(j*si[i].channels)]=0;
} else {
sysBuf[i][k+(j*si[i].channels)]=disCont[i].bbOut[k][j];
}
}
}
if (lastLoopPos>-1 && j>=lastLoopPos && totalLoops>=exportLoopCount) {
logD("start fading out...");
isFadingOut=true;
if (fadeOutSamples==0) break;
}
}
}
for (int i=0; i<song.systemLen; i++) {
if (sf_writef_short(sf[i],sysBuf[i],total)!=(int)total) {
logE("error: failed to write entire buffer! (%d)",i);
break;
}
}
}
delete[] outBuf[0];
delete[] outBuf[1];
for (int i=0; i<song.systemLen; i++) {
delete[] sysBuf[i];
if (sfWrap[i].doClose()!=0) {
logE("could not close audio file!");
}
}
if (initAudioBackend()) {
for (int i=0; i<song.systemLen; i++) {
disCont[i].setRates(got.rate);
disCont[i].setQuality(lowQuality,dcHiPass);
}
if (!output->setRun(true)) {
logE("error while activating audio!");
}
}
logI("done!");
exporting=false;
break;
}
case DIV_EXPORT_MODE_MANY_CHAN: {
// take control of audio output
deinitAudioBackend();
float* outBuf[3];
outBuf[0]=new float[EXPORT_BUFSIZE];
outBuf[1]=new float[EXPORT_BUFSIZE];
outBuf[2]=new float[EXPORT_BUFSIZE*2];
logI("rendering to files...");
for (int i=0; i<chans; i++) {
SNDFILE* sf;
SF_INFO si;
SFWrapper sfWrap;
String fname=fmt::sprintf("%s_c%02d.wav",exportPath,i+1);
logI("- %s",fname.c_str());
si.samplerate=got.rate;
si.channels=2;
si.format=SF_FORMAT_WAV|SF_FORMAT_PCM_16;
sf=sfWrap.doOpen(fname.c_str(),SFM_WRITE,&si);
if (sf==NULL) {
logE("could not open file for writing! (%s)",sf_strerror(NULL));
break;
}
for (int j=0; j<chans; j++) {
bool mute=(j!=i);
isMuted[j]=mute;
}
if (getChannelType(i)==5) {
for (int j=i; j<chans; j++) {
if (getChannelType(j)!=5) break;
isMuted[j]=false;
}
}
for (int j=0; j<chans; j++) {
if (disCont[dispatchOfChan[j]].dispatch!=NULL) {
disCont[dispatchOfChan[j]].dispatch->muteChannel(dispatchChanOfChan[j],isMuted[j]);
}
}
curOrder=0;
prevOrder=0;
curFadeOutSample=0;
lastLoopPos=-1;
totalLoops=0;
isFadingOut=false;
remainingLoops=-1;
playSub(false);
while (playing) {
size_t total=0;
nextBuf(NULL,outBuf,0,2,EXPORT_BUFSIZE);
if (totalProcessed>EXPORT_BUFSIZE) {
logE("error: total processed is bigger than export bufsize! %d>%d",totalProcessed,EXPORT_BUFSIZE);
totalProcessed=EXPORT_BUFSIZE;
}
for (int j=0; j<(int)totalProcessed; j++) {
total++;
if (isFadingOut) {
double mul=(1.0-((double)curFadeOutSample/(double)fadeOutSamples));
outBuf[2][j<<1]=MAX(-1.0f,MIN(1.0f,outBuf[0][j]))*mul;
outBuf[2][1+(j<<1)]=MAX(-1.0f,MIN(1.0f,outBuf[1][j]))*mul;
if (++curFadeOutSample>=fadeOutSamples) {
playing=false;
break;
}
} else {
outBuf[2][j<<1]=MAX(-1.0f,MIN(1.0f,outBuf[0][j]));
outBuf[2][1+(j<<1)]=MAX(-1.0f,MIN(1.0f,outBuf[1][j]));
if (lastLoopPos>-1 && j>=lastLoopPos && totalLoops>=exportLoopCount) {
logD("start fading out...");
isFadingOut=true;
if (fadeOutSamples==0) break;
}
}
}
if (sf_writef_float(sf,outBuf[2],total)!=(int)total) {
logE("error: failed to write entire buffer!");
break;
}
}
if (sfWrap.doClose()!=0) {
logE("could not close audio file!");
}
if (getChannelType(i)==5) {
i++;
while (true) {
if (i>=chans) break;
if (getChannelType(i)!=5) break;
i++;
}
i--;
}
if (stopExport) break;
}
delete[] outBuf[0];
delete[] outBuf[1];
delete[] outBuf[2];
for (int i=0; i<chans; i++) {
isMuted[i]=false;
if (disCont[dispatchOfChan[i]].dispatch!=NULL) {
disCont[dispatchOfChan[i]].dispatch->muteChannel(dispatchChanOfChan[i],false);
}
}
if (initAudioBackend()) {
for (int i=0; i<song.systemLen; i++) {
disCont[i].setRates(got.rate);
disCont[i].setQuality(lowQuality,dcHiPass);
}
if (!output->setRun(true)) {
logE("error while activating audio!");
}
}
logI("done!");
exporting=false;
break;
}
}
stopExport=false;
}
#else
void DivEngine::runExportThread() {
}
#endif
bool DivEngine::shallSwitchCores() {
// TODO: detect whether we should
return true;
}
bool DivEngine::saveAudio(const char* path, int loops, DivAudioExportModes mode, double fadeOutTime) {
#ifndef HAVE_SNDFILE
logE("Furnace was not compiled with libsndfile. cannot export!");
return false;
#else
exportPath=path;
exportMode=mode;
exportFadeOut=fadeOutTime;
if (exportMode!=DIV_EXPORT_MODE_ONE) {
// remove extension
String lowerCase=exportPath;
for (char& i: lowerCase) {
if (i>='A' && i<='Z') i+='a'-'A';
}
size_t extPos=lowerCase.rfind(".wav");
if (extPos!=String::npos) {
exportPath=exportPath.substr(0,extPos);
}
}
exporting=true;
stopExport=false;
stop();
repeatPattern=false;
setOrder(0);
remainingLoops=-1;
if (shallSwitchCores()) {
bool isMutedBefore[DIV_MAX_CHANS];
memcpy(isMutedBefore,isMuted,DIV_MAX_CHANS*sizeof(bool));
quitDispatch();
initDispatch(true);
renderSamplesP();
for (int i=0; i<chans; i++) {
if (isMutedBefore[i]) {
muteChannel(i,true);
}
}
}
exportLoopCount=loops;
exportThread=new std::thread(_runExportThread,this);
return true;
#endif
}
void DivEngine::waitAudioFile() {
if (exportThread!=NULL) {
exportThread->join();
}
}
bool DivEngine::haltAudioFile() {
stopExport=true;
stop();
waitAudioFile();
finishAudioFile();
return true;
}
void DivEngine::finishAudioFile() {
if (shallSwitchCores()) {
bool isMutedBefore[DIV_MAX_CHANS];
memcpy(isMutedBefore,isMuted,DIV_MAX_CHANS*sizeof(bool));
quitDispatch();
initDispatch(false);
renderSamplesP();
for (int i=0; i<chans; i++) {
if (isMutedBefore[i]) {
muteChannel(i,true);
}
}
}
}
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