399 lines
12 KiB
C++
399 lines
12 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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#include "cmdStream.h"
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#include "engine.h"
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#include "../ta-log.h"
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bool DivCSChannelState::doCall(unsigned int addr) {
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if (callStackPos>=8) {
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readPos=0;
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return false;
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}
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callStack[callStackPos++]=readPos;
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readPos=addr;
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return true;
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}
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void DivCSPlayer::cleanup() {
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delete b;
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}
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bool DivCSPlayer::tick() {
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bool ticked=false;
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for (int i=0; i<e->getTotalChannelCount(); i++) {
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bool sendVolume=false;
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bool sendPitch=false;
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if (chan[i].readPos==0) continue;
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ticked=true;
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chan[i].waitTicks--;
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while (chan[i].waitTicks<=0) {
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if (!stream.seek(chan[i].readPos,SEEK_SET)) {
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logE("%d: access violation! $%x",i,chan[i].readPos);
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chan[i].readPos=0;
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break;
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}
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unsigned char next=stream.readC();
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unsigned char command=0;
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if (next<0xb3) { // note
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e->dispatchCmd(DivCommand(DIV_CMD_NOTE_ON,i,(int)next-60));
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logV("%d: note on (%d)",i,(int)next-60);
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chan[i].vibratoPos=0;
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} else if (next>=0xd0 && next<=0xdf) {
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command=fastCmds[next&15];
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} else if (next>=0xe0 && next<=0xef) { // preset delay
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chan[i].waitTicks=fastDelays[next&15];
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} else switch (next) {
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case 0xb4: // note on null
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e->dispatchCmd(DivCommand(DIV_CMD_NOTE_ON,i,DIV_NOTE_NULL));
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chan[i].vibratoPos=0;
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break;
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case 0xb5: // note off
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e->dispatchCmd(DivCommand(DIV_CMD_NOTE_OFF,i));
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break;
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case 0xb6: // note off env
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e->dispatchCmd(DivCommand(DIV_CMD_NOTE_OFF_ENV,i));
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break;
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case 0xb7: // env release
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e->dispatchCmd(DivCommand(DIV_CMD_ENV_RELEASE,i));
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break;
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case 0xb8: case 0xbe: case 0xc0: case 0xc2:
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case 0xc3: case 0xc4: case 0xc5: case 0xc6:
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case 0xc7: case 0xc8: case 0xc9: case 0xca:
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command=next-0xb4;
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break;
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case 0xf7:
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command=stream.readC();
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break;
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case 0xf8: {
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unsigned int callAddr=chan[i].readPos+2+stream.readS();
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if (!chan[i].doCall(callAddr)) {
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logE("%d: (callb16) stack error!",i);
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}
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break;
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}
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case 0xf6: {
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unsigned int callAddr=chan[i].readPos+4+stream.readI();
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if (!chan[i].doCall(callAddr)) {
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logE("%d: (callb32) stack error!",i);
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}
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break;
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}
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case 0xf5: {
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unsigned int callAddr=stream.readI();
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if (!chan[i].doCall(callAddr)) {
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logE("%d: (call) stack error!",i);
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}
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break;
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}
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case 0xf4: {
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logE("%d: (callsym) not supported here!",i);
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chan[i].readPos=0;
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break;
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}
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case 0xf9:
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if (!chan[i].callStackPos) {
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logE("%d: (ret) stack error!",i);
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chan[i].readPos=0;
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break;
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}
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chan[i].readPos=chan[i].callStack[--chan[i].callStackPos];
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break;
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case 0xfa:
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chan[i].readPos=stream.readI();
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break;
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case 0xfb:
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logE("TODO: RATE");
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stream.readI();
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break;
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case 0xfc:
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chan[i].waitTicks=(unsigned short)stream.readS();
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break;
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case 0xfd:
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chan[i].waitTicks=(unsigned char)stream.readC();
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break;
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case 0xfe:
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chan[i].waitTicks=1;
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break;
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case 0xff:
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chan[i].readPos=0;
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logI("%d: stop",i);
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break;
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default:
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logE("%d: illegal instruction $%.2x! $%.x",i,next,chan[i].readPos);
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chan[i].readPos=0;
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break;
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}
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if (chan[i].readPos==0) break;
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if (command) {
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int arg0=0;
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int arg1=0;
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switch (command) {
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case DIV_CMD_INSTRUMENT:
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case DIV_CMD_HINT_VIBRATO_RANGE:
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case DIV_CMD_HINT_VIBRATO_SHAPE:
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case DIV_CMD_HINT_VOLUME:
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arg0=(unsigned char)stream.readC();
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break;
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case DIV_CMD_HINT_PITCH:
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arg0=(signed char)stream.readC();
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break;
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case DIV_CMD_PANNING:
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case DIV_CMD_HINT_VIBRATO:
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case DIV_CMD_HINT_ARPEGGIO:
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case DIV_CMD_HINT_PORTA:
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arg0=(signed char)stream.readC();
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arg1=(unsigned char)stream.readC();
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break;
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case DIV_CMD_PRE_PORTA:
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arg0=(unsigned char)stream.readC();
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arg1=(arg0&0x40)?1:0;
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arg0=(arg0&0x80)?1:0;
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break;
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case DIV_CMD_HINT_VOL_SLIDE:
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arg0=(short)stream.readS();
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break;
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case DIV_CMD_HINT_LEGATO:
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arg0=(unsigned char)stream.readC();
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if (arg0==0xff) {
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arg0=DIV_NOTE_NULL;
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} else {
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arg0-=60;
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}
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break;
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case DIV_CMD_SAMPLE_MODE:
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case DIV_CMD_SAMPLE_FREQ:
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case DIV_CMD_SAMPLE_BANK:
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case DIV_CMD_SAMPLE_POS:
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case DIV_CMD_SAMPLE_DIR:
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case DIV_CMD_FM_HARD_RESET:
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case DIV_CMD_FM_LFO:
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case DIV_CMD_FM_LFO_WAVE:
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case DIV_CMD_FM_FB:
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case DIV_CMD_FM_EXTCH:
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case DIV_CMD_FM_AM_DEPTH:
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case DIV_CMD_FM_PM_DEPTH:
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case DIV_CMD_STD_NOISE_FREQ:
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case DIV_CMD_STD_NOISE_MODE:
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case DIV_CMD_WAVE:
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case DIV_CMD_GB_SWEEP_TIME:
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case DIV_CMD_GB_SWEEP_DIR:
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case DIV_CMD_PCE_LFO_MODE:
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case DIV_CMD_PCE_LFO_SPEED:
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case DIV_CMD_NES_DMC:
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case DIV_CMD_C64_CUTOFF:
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case DIV_CMD_C64_RESONANCE:
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case DIV_CMD_C64_FILTER_MODE:
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case DIV_CMD_C64_RESET_TIME:
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case DIV_CMD_C64_RESET_MASK:
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case DIV_CMD_C64_FILTER_RESET:
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case DIV_CMD_C64_DUTY_RESET:
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case DIV_CMD_C64_EXTENDED:
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case DIV_CMD_AY_ENVELOPE_SET:
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case DIV_CMD_AY_ENVELOPE_LOW:
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case DIV_CMD_AY_ENVELOPE_HIGH:
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case DIV_CMD_AY_ENVELOPE_SLIDE:
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case DIV_CMD_AY_NOISE_MASK_AND:
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case DIV_CMD_AY_NOISE_MASK_OR:
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case DIV_CMD_AY_AUTO_ENVELOPE:
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case DIV_CMD_FDS_MOD_DEPTH:
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case DIV_CMD_FDS_MOD_HIGH:
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case DIV_CMD_FDS_MOD_LOW:
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case DIV_CMD_FDS_MOD_POS:
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case DIV_CMD_FDS_MOD_WAVE:
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case DIV_CMD_SAA_ENVELOPE:
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case DIV_CMD_AMIGA_FILTER:
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case DIV_CMD_AMIGA_AM:
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case DIV_CMD_AMIGA_PM:
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case DIV_CMD_MACRO_OFF:
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case DIV_CMD_MACRO_ON:
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arg0=(unsigned char)stream.readC();
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break;
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case DIV_CMD_FM_TL:
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case DIV_CMD_FM_AM:
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case DIV_CMD_FM_AR:
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case DIV_CMD_FM_DR:
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case DIV_CMD_FM_SL:
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case DIV_CMD_FM_D2R:
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case DIV_CMD_FM_RR:
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case DIV_CMD_FM_DT:
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case DIV_CMD_FM_DT2:
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case DIV_CMD_FM_RS:
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case DIV_CMD_FM_KSR:
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case DIV_CMD_FM_VIB:
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case DIV_CMD_FM_SUS:
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case DIV_CMD_FM_WS:
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case DIV_CMD_FM_SSG:
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case DIV_CMD_FM_REV:
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case DIV_CMD_FM_EG_SHIFT:
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case DIV_CMD_FM_MULT:
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case DIV_CMD_FM_FINE:
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case DIV_CMD_AY_IO_WRITE:
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case DIV_CMD_AY_AUTO_PWM:
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case DIV_CMD_SURROUND_PANNING:
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arg0=(unsigned char)stream.readC();
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arg1=(unsigned char)stream.readC();
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break;
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case DIV_CMD_C64_FINE_DUTY:
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case DIV_CMD_C64_FINE_CUTOFF:
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case DIV_CMD_LYNX_LFSR_LOAD:
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arg0=(unsigned short)stream.readS();
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break;
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case DIV_CMD_FM_FIXFREQ:
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arg0=(unsigned short)stream.readS();
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arg1=arg0&0x7ff;
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arg0>>=12;
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break;
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case DIV_CMD_NES_SWEEP:
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arg0=(unsigned char)stream.readC();
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arg1=arg0&0x77;
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arg0=(arg0&8)?1:0;
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break;
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}
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switch (command) {
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case DIV_CMD_HINT_VOLUME:
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chan[i].volume=arg0<<8;
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sendVolume=true;
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break;
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case DIV_CMD_HINT_VOL_SLIDE:
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chan[i].volSpeed=arg0;
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break;
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case DIV_CMD_HINT_PITCH:
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chan[i].pitch=arg0;
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sendPitch=true;
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break;
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case DIV_CMD_HINT_VIBRATO:
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chan[i].vibratoDepth=arg0;
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chan[i].vibratoRate=arg1;
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sendPitch=true;
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break;
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case DIV_CMD_HINT_PORTA:
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chan[i].portaTarget=arg0;
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chan[i].portaSpeed=arg1;
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break;
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case DIV_CMD_HINT_LEGATO:
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chan[i].note=arg0;
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e->dispatchCmd(DivCommand(DIV_CMD_LEGATO,i,chan[i].note));
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break;
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default: // dispatch it
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e->dispatchCmd(DivCommand((DivDispatchCmds)command,i,arg0,arg1));
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break;
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}
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}
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chan[i].readPos=stream.tell();
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}
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if (sendVolume || chan[i].volSpeed!=0) {
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chan[i].volume+=chan[i].volSpeed;
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if (chan[i].volume<0) {
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chan[i].volume=0;
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}
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if (chan[i].volume>chan[i].volMax) {
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chan[i].volume=chan[i].volMax;
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}
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e->dispatchCmd(DivCommand(DIV_CMD_VOLUME,i,chan[i].volume>>8));
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}
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if (sendPitch || chan[i].vibratoDepth!=0) {
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if (chan[i].vibratoDepth>0) {
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chan[i].vibratoPos+=chan[i].vibratoRate;
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if (chan[i].vibratoPos>=64) chan[i].vibratoPos-=64;
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}
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e->dispatchCmd(DivCommand(DIV_CMD_PITCH,i,chan[i].pitch+(vibTable[chan[i].vibratoPos&63]*chan[i].vibratoDepth)/15));
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}
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if (chan[i].portaSpeed) {
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e->dispatchCmd(DivCommand(DIV_CMD_NOTE_PORTA,i,chan[i].portaSpeed*(e->song.linearPitch==2?e->song.pitchSlideSpeed:1),chan[i].portaTarget));
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}
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}
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return ticked;
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}
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bool DivCSPlayer::init() {
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unsigned char magic[4];
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stream.seek(0,SEEK_SET);
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stream.read(magic,4);
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if (memcmp(magic,"FCS",4)!=0) return false;
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unsigned int chans=stream.readI();
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for (unsigned int i=0; i<chans; i++) {
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if (i>=DIV_MAX_CHANS) {
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stream.readI();
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continue;
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}
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if ((int)i>=e->getTotalChannelCount()) {
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stream.readI();
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continue;
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}
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chan[i].readPos=stream.readI();
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}
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stream.read(fastDelays,16);
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stream.read(fastCmds,16);
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// initialize state
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for (int i=0; i<e->getTotalChannelCount(); i++) {
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chan[i].volMax=(e->getDispatch(e->dispatchOfChan[i])->dispatch(DivCommand(DIV_CMD_GET_VOLMAX,e->dispatchChanOfChan[i]))<<8)|0xff;
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chan[i].volume=chan[i].volMax;
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}
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for (int i=0; i<64; i++) {
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vibTable[i]=127*sin(((double)i/64.0)*(2*M_PI));
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}
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return true;
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}
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// DivEngine
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bool DivEngine::playStream(unsigned char* f, size_t length) {
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BUSY_BEGIN;
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cmdStreamInt=new DivCSPlayer(this,f,length);
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if (!cmdStreamInt->init()) {
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logE("not a command stream!");
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lastError="not a command stream";
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delete[] f;
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delete cmdStreamInt;
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cmdStreamInt=NULL;
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BUSY_END;
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return false;
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}
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if (!playing) {
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reset();
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freelance=true;
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playing=true;
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}
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BUSY_END;
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return true;
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}
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