mirror of
https://github.com/tildearrow/furnace.git
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273 lines
7.9 KiB
C++
273 lines
7.9 KiB
C++
/**
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* Furnace Tracker - multi-system chiptune tracker
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* Copyright (C) 2021-2023 tildearrow and contributors
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef _YM2610SHARED_H
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#define _YM2610SHARED_H
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#include "fmshared_OPN.h"
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#include "../engine.h"
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#include "../../ta-log.h"
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#include "ay.h"
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#include "sound/ymfm/ymfm.h"
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#include "sound/ymfm/ymfm_opn.h"
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#include <string.h>
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#define CHIP_FREQBASE fmFreqBase
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#define CHIP_DIVIDER fmDivBase
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class DivYM2610Interface: public ymfm::ymfm_interface {
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public:
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unsigned char* adpcmAMem;
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unsigned char* adpcmBMem;
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int sampleBank;
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uint8_t ymfm_external_read(ymfm::access_class type, uint32_t address);
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void ymfm_external_write(ymfm::access_class type, uint32_t address, uint8_t data);
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DivYM2610Interface():
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adpcmAMem(NULL),
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adpcmBMem(NULL),
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sampleBank(0) {}
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};
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class DivPlatformYM2610Base: public DivPlatformOPN {
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protected:
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OPNChannelStereo chan[16];
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DivDispatchOscBuffer* oscBuf[16];
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bool isMuted[16];
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ym3438_t fm_nuked;
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ymfm::ym2610b* fm;
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ymfm::ym2610b::output_data fmout;
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DivPlatformAY8910* ay;
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unsigned char* adpcmAMem;
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size_t adpcmAMemLen;
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unsigned char* adpcmBMem;
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size_t adpcmBMemLen;
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DivYM2610Interface iface;
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unsigned int sampleOffA[256];
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unsigned int sampleOffB[256];
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unsigned char sampleBank;
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bool extMode, noExtMacros;
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bool sampleLoaded[2][256];
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unsigned char writeADPCMAOff, writeADPCMAOn;
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int globalADPCMAVolume;
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double NOTE_OPNB(int ch, int note) {
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if (ch>=adpcmBChanOffs) { // ADPCM
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return NOTE_ADPCMB(note);
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} else if (ch>=psgChanOffs) { // PSG
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return NOTE_PERIODIC(note);
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}
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// FM
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return NOTE_FNUM_BLOCK(note,11);
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}
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double NOTE_ADPCMB(int note) {
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if (chan[adpcmBChanOffs].sample>=0 && chan[adpcmBChanOffs].sample<parent->song.sampleLen) {
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double off=65535.0*(double)(parent->getSample(chan[adpcmBChanOffs].sample)->centerRate)/8363.0;
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return parent->calcBaseFreq((double)chipClock/144,off,note,false);
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}
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return 0;
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}
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public:
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void reset() {
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writeADPCMAOff=0;
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writeADPCMAOn=0;
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globalADPCMAVolume=0x3f;
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OPN2_Reset(&fm_nuked);
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OPN2_SetChipType(&fm_nuked,ym3438_mode_opn);
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ay->reset();
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ay->getRegisterWrites().clear();
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ay->flushWrites();
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}
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void muteChannel(int ch, bool mute) {
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isMuted[ch]=mute;
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if (ch>=adpcmBChanOffs) { // ADPCM-B
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immWrite(0x11,isMuted[ch]?0:(chan[ch].pan<<6));
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}
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if (ch>=adpcmAChanOffs) { // ADPCM-A
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immWrite(0x108+(ch-adpcmAChanOffs),isMuted[ch]?0:((chan[ch].pan<<6)|chan[ch].outVol));
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return;
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}
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if (ch>=psgChanOffs) { // PSG
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ay->muteChannel(ch-psgChanOffs,mute);
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return;
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}
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}
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int getOutputCount() {
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return 2;
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}
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const void* getSampleMem(int index) {
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return index == 0 ? adpcmAMem : index == 1 ? adpcmBMem : NULL;
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}
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size_t getSampleMemCapacity(int index) {
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return index == 0 ? 16777216 : index == 1 ? 16777216 : 0;
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}
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const char* getSampleMemName(int index=0) {
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return index == 0 ? "ADPCM-A" : index == 1 ? "ADPCM-B" : NULL;
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}
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size_t getSampleMemUsage(int index) {
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return index == 0 ? adpcmAMemLen : index == 1 ? adpcmBMemLen : 0;
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}
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bool isSampleLoaded(int index, int sample) {
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if (index<0 || index>1) return false;
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if (sample<0 || sample>255) return false;
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return sampleLoaded[index][sample];
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}
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void renderSamples(int sysID) {
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memset(adpcmAMem,0,getSampleMemCapacity(0));
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memset(sampleOffA,0,256*sizeof(unsigned int));
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memset(sampleOffB,0,256*sizeof(unsigned int));
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memset(sampleLoaded,0,256*2*sizeof(bool));
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size_t memPos=0;
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for (int i=0; i<parent->song.sampleLen; i++) {
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DivSample* s=parent->song.sample[i];
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if (!s->renderOn[0][sysID]) {
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sampleOffA[i]=0;
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continue;
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}
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int paddedLen=(s->lengthA+255)&(~0xff);
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if ((memPos&0xf00000)!=((memPos+paddedLen)&0xf00000)) {
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memPos=(memPos+0xfffff)&0xf00000;
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}
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if (memPos>=getSampleMemCapacity(0)) {
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logW("out of ADPCM-A memory for sample %d!",i);
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break;
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}
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if (memPos+paddedLen>=getSampleMemCapacity(0)) {
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memcpy(adpcmAMem+memPos,s->dataA,getSampleMemCapacity(0)-memPos);
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logW("out of ADPCM-A memory for sample %d!",i);
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} else {
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memcpy(adpcmAMem+memPos,s->dataA,paddedLen);
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sampleLoaded[0][i]=true;
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}
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sampleOffA[i]=memPos;
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memPos+=paddedLen;
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}
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adpcmAMemLen=memPos+256;
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memset(adpcmBMem,0,getSampleMemCapacity(1));
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memPos=0;
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for (int i=0; i<parent->song.sampleLen; i++) {
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DivSample* s=parent->song.sample[i];
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if (!s->renderOn[1][sysID]) {
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sampleOffB[i]=0;
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continue;
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}
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int paddedLen=(s->lengthB+255)&(~0xff);
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if ((memPos&0xf00000)!=((memPos+paddedLen)&0xf00000)) {
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memPos=(memPos+0xfffff)&0xf00000;
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}
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if (memPos>=getSampleMemCapacity(1)) {
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logW("out of ADPCM-B memory for sample %d!",i);
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break;
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}
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if (memPos+paddedLen>=getSampleMemCapacity(1)) {
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memcpy(adpcmBMem+memPos,s->dataB,getSampleMemCapacity(1)-memPos);
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logW("out of ADPCM-B memory for sample %d!",i);
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} else {
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memcpy(adpcmBMem+memPos,s->dataB,paddedLen);
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sampleLoaded[1][i]=true;
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}
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sampleOffB[i]=memPos;
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memPos+=paddedLen;
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}
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adpcmBMemLen=memPos+256;
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}
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void setFlags(const DivConfig& flags) {
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switch (flags.getInt("clockSel",0)) {
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case 0x01:
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chipClock=24167829/3;
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break;
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default:
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chipClock=8000000.0;
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break;
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}
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CHECK_CUSTOM_CLOCK;
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noExtMacros=flags.getBool("noExtMacros",false);
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fbAllOps=flags.getBool("fbAllOps",false);
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ssgVol=flags.getInt("ssgVol",128);
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fmVol=flags.getInt("fmVol",256);
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rate=fm->sample_rate(chipClock);
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for (int i=0; i<16; i++) {
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oscBuf[i]->rate=rate;
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}
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}
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int init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
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parent=p;
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ayFlags.set("chipType",1);
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dumpWrites=false;
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skipRegisterWrites=false;
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for (int i=0; i<16; i++) {
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isMuted[i]=false;
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oscBuf[i]=new DivDispatchOscBuffer;
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}
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adpcmAMem=new unsigned char[getSampleMemCapacity(0)];
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adpcmAMemLen=0;
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adpcmBMem=new unsigned char[getSampleMemCapacity(1)];
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adpcmBMemLen=0;
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iface.adpcmAMem=adpcmAMem;
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iface.adpcmBMem=adpcmBMem;
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iface.sampleBank=0;
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fm=new ymfm::ym2610b(iface);
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fm->set_fidelity(ymfm::OPN_FIDELITY_MED);
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setFlags(flags);
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// YM2149, 2MHz
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ay=new DivPlatformAY8910(true,chipClock,32,144);
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ay->init(p,3,sugRate,ayFlags);
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ay->toggleRegisterDump(true);
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return 0;
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}
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void quit() {
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for (int i=0; i<16; i++) {
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delete oscBuf[i];
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}
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ay->quit();
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delete ay;
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delete[] adpcmAMem;
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delete[] adpcmBMem;
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}
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DivPlatformYM2610Base(int ext, int psg, int adpcmA, int adpcmB, int chanCount):
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DivPlatformOPN(ext,psg,adpcmA,adpcmB,chanCount,9440540.0, 72, 32) {}
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};
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#endif
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