mirror of
https://github.com/tildearrow/furnace.git
synced 2024-11-16 09:45:06 +00:00
409 lines
11 KiB
C++
409 lines
11 KiB
C++
/**
|
|
* Furnace Tracker - multi-system chiptune tracker
|
|
* Copyright (C) 2021-2022 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.
|
|
*/
|
|
|
|
#define _USE_MATH_DEFINES
|
|
#include "pcmdac.h"
|
|
#include "../engine.h"
|
|
#include <math.h>
|
|
|
|
// to ease the driver, freqency register is a 8.16 counter relative to output sample rate
|
|
#define CHIP_FREQBASE 65536
|
|
|
|
void DivPlatformPCMDAC::acquire(short* bufL, short* bufR, size_t start, size_t len) {
|
|
const int depthScale=(15-outDepth);
|
|
int output=0;
|
|
for (size_t h=start; h<start+len; h++) {
|
|
if (!chan.active || isMuted) {
|
|
bufL[h]=0;
|
|
bufR[h]=0;
|
|
oscBuf->data[oscBuf->needle++]=0;
|
|
continue;
|
|
}
|
|
if (chan.useWave || (chan.sample>=0 && chan.sample<parent->song.sampleLen)) {
|
|
chan.audPos+=((!chan.useWave) && chan.audDir)?-(chan.freq>>16):(chan.freq>>16);
|
|
chan.audSub+=(chan.freq&0xffff);
|
|
if (chan.audSub>=0x10000) {
|
|
chan.audSub-=0x10000;
|
|
chan.audPos+=((!chan.useWave) && chan.audDir)?-1:1;
|
|
}
|
|
if (chan.useWave) {
|
|
if (chan.audPos>=(int)chan.audLen) {
|
|
chan.audPos%=chan.audLen;
|
|
chan.audDir=false;
|
|
}
|
|
output=(chan.ws.output[chan.audPos]^0x80)<<8;
|
|
} else {
|
|
DivSample* s=parent->getSample(chan.sample);
|
|
if (s->samples>0) {
|
|
if (chan.audDir) {
|
|
if (s->isLoopable()) {
|
|
switch (s->loopMode) {
|
|
case DIV_SAMPLE_LOOP_FORWARD:
|
|
case DIV_SAMPLE_LOOP_PINGPONG:
|
|
if (chan.audPos<s->loopStart) {
|
|
chan.audPos=s->loopStart+(s->loopStart-chan.audPos);
|
|
chan.audDir=false;
|
|
}
|
|
break;
|
|
case DIV_SAMPLE_LOOP_BACKWARD:
|
|
if (chan.audPos<s->loopStart) {
|
|
chan.audPos=s->loopEnd-1-(s->loopStart-chan.audPos);
|
|
chan.audDir=true;
|
|
}
|
|
break;
|
|
default:
|
|
if (chan.audPos<0) {
|
|
chan.sample=-1;
|
|
}
|
|
break;
|
|
}
|
|
} else if (chan.audPos>=(int)s->samples) {
|
|
chan.sample=-1;
|
|
}
|
|
} else {
|
|
if (s->isLoopable()) {
|
|
switch (s->loopMode) {
|
|
case DIV_SAMPLE_LOOP_FORWARD:
|
|
if (chan.audPos>=s->loopEnd) {
|
|
chan.audPos=(chan.audPos+s->loopStart)-s->loopEnd;
|
|
chan.audDir=false;
|
|
}
|
|
break;
|
|
case DIV_SAMPLE_LOOP_BACKWARD:
|
|
case DIV_SAMPLE_LOOP_PINGPONG:
|
|
if (chan.audPos>=s->loopEnd) {
|
|
chan.audPos=s->loopEnd-1-(s->loopEnd-1-chan.audPos);
|
|
chan.audDir=true;
|
|
}
|
|
break;
|
|
default:
|
|
if (chan.audPos>=(int)s->samples) {
|
|
chan.sample=-1;
|
|
}
|
|
break;
|
|
}
|
|
} else if (chan.audPos>=(int)s->samples) {
|
|
chan.sample=-1;
|
|
}
|
|
}
|
|
if (chan.audPos>=0 && chan.audPos<(int)s->samples) {
|
|
output=s->data16[chan.audPos];
|
|
}
|
|
} else {
|
|
chan.sample=-1;
|
|
}
|
|
}
|
|
}
|
|
output=output*chan.vol*chan.envVol/16384;
|
|
oscBuf->data[oscBuf->needle++]=output;
|
|
if (outStereo) {
|
|
bufL[h]=((output*chan.panL)>>(depthScale+8))<<depthScale;
|
|
bufR[h]=((output*chan.panR)>>(depthScale+8))<<depthScale;
|
|
} else {
|
|
output=(output>>depthScale)<<depthScale;
|
|
bufL[h]=output;
|
|
bufR[h]=output;
|
|
}
|
|
}
|
|
}
|
|
|
|
void DivPlatformPCMDAC::tick(bool sysTick) {
|
|
chan.std.next();
|
|
if (chan.std.vol.had) {
|
|
chan.envVol=chan.std.vol.val;
|
|
}
|
|
if (chan.std.arp.had) {
|
|
if (!chan.inPorta) {
|
|
chan.baseFreq=NOTE_FREQUENCY(parent->calcArp(chan.note,chan.std.arp.val));
|
|
}
|
|
chan.freqChanged=true;
|
|
}
|
|
if (chan.useWave && chan.std.wave.had) {
|
|
if (chan.wave!=chan.std.wave.val || chan.ws.activeChanged()) {
|
|
chan.wave=chan.std.wave.val;
|
|
chan.ws.changeWave1(chan.wave);
|
|
if (!chan.keyOff) chan.keyOn=true;
|
|
}
|
|
}
|
|
if (chan.useWave && chan.active) {
|
|
chan.ws.tick();
|
|
}
|
|
if (chan.std.pitch.had) {
|
|
if (chan.std.pitch.mode) {
|
|
chan.pitch2+=chan.std.pitch.val;
|
|
CLAMP_VAR(chan.pitch2,-32768,32767);
|
|
} else {
|
|
chan.pitch2=chan.std.pitch.val;
|
|
}
|
|
chan.freqChanged=true;
|
|
}
|
|
if (chan.std.panL.had) {
|
|
int val=chan.std.panL.val&0x7f;
|
|
chan.panL=val*2;
|
|
}
|
|
if (chan.std.panR.had) {
|
|
int val=chan.std.panR.val&0x7f;
|
|
chan.panR=val*2;
|
|
}
|
|
if (chan.std.phaseReset.had) {
|
|
if (chan.std.phaseReset.val==1) {
|
|
chan.audDir=false;
|
|
chan.audPos=0;
|
|
}
|
|
}
|
|
if (chan.freqChanged || chan.keyOn || chan.keyOff) {
|
|
//DivInstrument* ins=parent->getIns(chan.ins,DIV_INS_AMIGA);
|
|
double off=1.0;
|
|
if (!chan.useWave && chan.sample>=0 && chan.sample<parent->song.sampleLen) {
|
|
DivSample* s=parent->getSample(chan.sample);
|
|
off=(s->centerRate>=1)?((double)s->centerRate/8363.0):1.0;
|
|
}
|
|
chan.freq=off*parent->calcFreq(chan.baseFreq,chan.pitch,false,2,chan.pitch2,chipClock,CHIP_FREQBASE);
|
|
if (chan.freq>16777215) chan.freq=16777215;
|
|
if (chan.keyOn) {
|
|
if (!chan.std.vol.had) {
|
|
chan.envVol=64;
|
|
}
|
|
chan.keyOn=false;
|
|
}
|
|
if (chan.keyOff) {
|
|
chan.keyOff=false;
|
|
}
|
|
chan.freqChanged=false;
|
|
}
|
|
}
|
|
|
|
int DivPlatformPCMDAC::dispatch(DivCommand c) {
|
|
switch (c.cmd) {
|
|
case DIV_CMD_NOTE_ON: {
|
|
DivInstrument* ins=parent->getIns(chan.ins,DIV_INS_AMIGA);
|
|
if (ins->amiga.useWave) {
|
|
chan.useWave=true;
|
|
chan.audLen=ins->amiga.waveLen;
|
|
if (chan.insChanged) {
|
|
if (chan.wave<0) {
|
|
chan.wave=0;
|
|
chan.ws.setWidth(chan.audLen);
|
|
chan.ws.changeWave1(chan.wave);
|
|
}
|
|
}
|
|
} else {
|
|
chan.sample=ins->amiga.getSample(c.value);
|
|
chan.useWave=false;
|
|
}
|
|
if (c.value!=DIV_NOTE_NULL) {
|
|
chan.baseFreq=round(NOTE_FREQUENCY(c.value));
|
|
}
|
|
if (chan.useWave || chan.sample<0 || chan.sample>=parent->song.sampleLen) {
|
|
chan.sample=-1;
|
|
}
|
|
if (chan.setPos) {
|
|
chan.setPos=false;
|
|
} else {
|
|
chan.audDir=false;
|
|
chan.audPos=0;
|
|
}
|
|
chan.audSub=0;
|
|
if (c.value!=DIV_NOTE_NULL) {
|
|
chan.freqChanged=true;
|
|
chan.note=c.value;
|
|
}
|
|
chan.active=true;
|
|
chan.keyOn=true;
|
|
chan.macroInit(ins);
|
|
if (!parent->song.brokenOutVol && !chan.std.vol.will) {
|
|
chan.envVol=64;
|
|
}
|
|
if (chan.useWave) {
|
|
chan.ws.init(ins,chan.audLen,255,chan.insChanged);
|
|
}
|
|
chan.insChanged=false;
|
|
break;
|
|
}
|
|
case DIV_CMD_NOTE_OFF:
|
|
chan.sample=-1;
|
|
chan.active=false;
|
|
chan.keyOff=true;
|
|
chan.macroInit(NULL);
|
|
break;
|
|
case DIV_CMD_NOTE_OFF_ENV:
|
|
case DIV_CMD_ENV_RELEASE:
|
|
chan.std.release();
|
|
break;
|
|
case DIV_CMD_INSTRUMENT:
|
|
if (chan.ins!=c.value || c.value2==1) {
|
|
chan.ins=c.value;
|
|
chan.insChanged=true;
|
|
}
|
|
break;
|
|
case DIV_CMD_VOLUME:
|
|
if (chan.vol!=c.value) {
|
|
chan.vol=c.value;
|
|
if (!chan.std.vol.has) {
|
|
chan.envVol=64;
|
|
}
|
|
}
|
|
break;
|
|
case DIV_CMD_GET_VOLUME:
|
|
return chan.vol;
|
|
break;
|
|
case DIV_CMD_PANNING:
|
|
chan.panL=c.value;
|
|
chan.panR=c.value2;
|
|
break;
|
|
case DIV_CMD_PITCH:
|
|
chan.pitch=c.value;
|
|
chan.freqChanged=true;
|
|
break;
|
|
case DIV_CMD_WAVE:
|
|
if (!chan.useWave) break;
|
|
chan.wave=c.value;
|
|
chan.keyOn=true;
|
|
chan.ws.changeWave1(chan.wave);
|
|
break;
|
|
case DIV_CMD_NOTE_PORTA: {
|
|
DivInstrument* ins=parent->getIns(chan.ins,DIV_INS_AMIGA);
|
|
chan.sample=ins->amiga.getSample(c.value2);
|
|
int destFreq=round(NOTE_FREQUENCY(c.value2));
|
|
bool return2=false;
|
|
if (destFreq>chan.baseFreq) {
|
|
chan.baseFreq+=c.value;
|
|
if (chan.baseFreq>=destFreq) {
|
|
chan.baseFreq=destFreq;
|
|
return2=true;
|
|
}
|
|
} else {
|
|
chan.baseFreq-=c.value;
|
|
if (chan.baseFreq<=destFreq) {
|
|
chan.baseFreq=destFreq;
|
|
return2=true;
|
|
}
|
|
}
|
|
chan.freqChanged=true;
|
|
if (return2) {
|
|
chan.inPorta=false;
|
|
return 2;
|
|
}
|
|
break;
|
|
}
|
|
case DIV_CMD_LEGATO: {
|
|
chan.baseFreq=round(NOTE_FREQUENCY(c.value+((chan.std.arp.will && !chan.std.arp.mode)?(chan.std.arp.val):(0))));
|
|
chan.freqChanged=true;
|
|
chan.note=c.value;
|
|
break;
|
|
}
|
|
case DIV_CMD_PRE_PORTA:
|
|
if (chan.active && c.value2) {
|
|
if (parent->song.resetMacroOnPorta) chan.macroInit(parent->getIns(chan.ins,DIV_INS_AMIGA));
|
|
}
|
|
chan.inPorta=c.value;
|
|
break;
|
|
case DIV_CMD_SAMPLE_POS:
|
|
if (chan.useWave) break;
|
|
chan.audPos=c.value;
|
|
chan.setPos=true;
|
|
break;
|
|
case DIV_CMD_GET_VOLMAX:
|
|
return 255;
|
|
break;
|
|
case DIV_ALWAYS_SET_VOLUME:
|
|
return 1;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
void DivPlatformPCMDAC::muteChannel(int ch, bool mute) {
|
|
isMuted=mute;
|
|
}
|
|
|
|
void DivPlatformPCMDAC::forceIns() {
|
|
chan.insChanged=true;
|
|
chan.freqChanged=true;
|
|
chan.audDir=false;
|
|
chan.audPos=0;
|
|
chan.sample=-1;
|
|
}
|
|
|
|
void* DivPlatformPCMDAC::getChanState(int ch) {
|
|
return &chan;
|
|
}
|
|
|
|
DivDispatchOscBuffer* DivPlatformPCMDAC::getOscBuffer(int ch) {
|
|
return oscBuf;
|
|
}
|
|
|
|
void DivPlatformPCMDAC::reset() {
|
|
chan=DivPlatformPCMDAC::Channel();
|
|
chan.std.setEngine(parent);
|
|
chan.ws.setEngine(parent);
|
|
chan.ws.init(NULL,32,255);
|
|
}
|
|
|
|
bool DivPlatformPCMDAC::isStereo() {
|
|
return true;
|
|
}
|
|
|
|
DivMacroInt* DivPlatformPCMDAC::getChanMacroInt(int ch) {
|
|
return &chan.std;
|
|
}
|
|
|
|
void DivPlatformPCMDAC::notifyInsChange(int ins) {
|
|
if (chan.ins==ins) {
|
|
chan.insChanged=true;
|
|
}
|
|
}
|
|
|
|
void DivPlatformPCMDAC::notifyWaveChange(int wave) {
|
|
if (chan.useWave && chan.wave==wave) {
|
|
chan.ws.changeWave1(wave);
|
|
}
|
|
}
|
|
|
|
void DivPlatformPCMDAC::notifyInsDeletion(void* ins) {
|
|
chan.std.notifyInsDeletion((DivInstrument*)ins);
|
|
}
|
|
|
|
void DivPlatformPCMDAC::setFlags(unsigned int flags) {
|
|
// default to 44100Hz 16-bit stereo
|
|
if (!flags) flags=0x1f0000|44099;
|
|
rate=(flags&0xffff)+1;
|
|
// rate can't be too low or the resampler will break
|
|
if (rate<1000) rate=1000;
|
|
chipClock=rate;
|
|
outDepth=(flags>>16)&0xf;
|
|
outStereo=(flags>>20)&1;
|
|
}
|
|
|
|
int DivPlatformPCMDAC::init(DivEngine* p, int channels, int sugRate, unsigned int flags) {
|
|
parent=p;
|
|
dumpWrites=false;
|
|
skipRegisterWrites=false;
|
|
oscBuf=new DivDispatchOscBuffer;
|
|
isMuted=false;
|
|
setFlags(flags);
|
|
reset();
|
|
return 1;
|
|
}
|
|
|
|
void DivPlatformPCMDAC::quit() {
|
|
delete oscBuf;
|
|
}
|