500 lines
14 KiB
C++
500 lines
14 KiB
C++
/**
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* Furnace Tracker - multi-system chiptune tracker
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* Copyright (C) 2021-2024 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 "engine.h"
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#include "../ta-log.h"
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#define WRITE_TICK(x) \
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if (!wroteTick[x]) { \
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wroteTick[x]=true; \
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if (tick-lastTick[x]>255) { \
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chanStream[x]->writeC(0xfc); \
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chanStream[x]->writeS(tick-lastTick[x]); \
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} else if (tick-lastTick[x]>1) { \
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delayPopularity[tick-lastTick[x]]++; \
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chanStream[x]->writeC(0xfd); \
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chanStream[x]->writeC(tick-lastTick[x]); \
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} else if (tick-lastTick[x]>0) { \
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chanStream[x]->writeC(0xfe); \
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} \
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lastTick[x]=tick; \
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}
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void writePackedCommandValues(SafeWriter* w, const DivCommand& c) {
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switch (c.cmd) {
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case DIV_CMD_NOTE_ON:
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if (c.value==DIV_NOTE_NULL) {
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w->writeC(0xb4);
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} else {
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w->writeC(CLAMP(c.value+60,0,0xb3));
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}
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break;
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case DIV_CMD_NOTE_OFF:
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case DIV_CMD_NOTE_OFF_ENV:
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case DIV_CMD_ENV_RELEASE:
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case DIV_CMD_INSTRUMENT:
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case DIV_CMD_PANNING:
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case DIV_CMD_PRE_PORTA:
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case DIV_CMD_HINT_VIBRATO:
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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_PITCH:
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case DIV_CMD_HINT_ARPEGGIO:
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case DIV_CMD_HINT_VOLUME:
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case DIV_CMD_HINT_PORTA:
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case DIV_CMD_HINT_VOL_SLIDE:
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case DIV_CMD_HINT_VOL_SLIDE_TARGET:
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case DIV_CMD_HINT_LEGATO:
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w->writeC((unsigned char)c.cmd+0xb4);
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break;
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default:
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w->writeC(0xf0); // unoptimized extended command
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w->writeC(c.cmd);
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break;
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}
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switch (c.cmd) {
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case DIV_CMD_HINT_LEGATO:
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if (c.value==DIV_NOTE_NULL) {
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w->writeC(0xff);
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} else {
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w->writeC(c.value+60);
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}
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break;
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case DIV_CMD_NOTE_ON:
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case DIV_CMD_NOTE_OFF:
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case DIV_CMD_NOTE_OFF_ENV:
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case DIV_CMD_ENV_RELEASE:
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break;
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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_PITCH:
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case DIV_CMD_HINT_VOLUME:
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w->writeC(c.value);
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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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w->writeC(c.value);
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w->writeC(c.value2);
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break;
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case DIV_CMD_PRE_PORTA:
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w->writeC((c.value?0x80:0)|(c.value2?0x40:0));
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break;
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case DIV_CMD_HINT_VOL_SLIDE:
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w->writeS(c.value);
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break;
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case DIV_CMD_HINT_VOL_SLIDE_TARGET:
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w->writeS(c.value);
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w->writeS(c.value2);
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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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case DIV_CMD_MACRO_RESTART:
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case DIV_CMD_HINT_ARP_TIME:
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w->writeC(1); // length
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w->writeC(c.value);
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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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w->writeC(2); // length
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w->writeC(c.value);
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w->writeC(c.value2);
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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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w->writeC(2); // length
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w->writeS(c.value);
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break;
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case DIV_CMD_FM_FIXFREQ:
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w->writeC(2); // length
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w->writeS((c.value<<12)|(c.value2&0x7ff));
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break;
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case DIV_CMD_NES_SWEEP:
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w->writeC(1); // length
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w->writeC((c.value?8:0)|(c.value2&0x77));
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break;
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default:
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logW("unimplemented command %s!",cmdName[c.cmd]);
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w->writeC(0); // length
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break;
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}
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}
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SafeWriter* DivEngine::saveCommand() {
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stop();
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repeatPattern=false;
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shallStop=false;
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setOrder(0);
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BUSY_BEGIN_SOFT;
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// determine loop point
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int loopOrder=0;
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int loopRow=0;
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int loopEnd=0;
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walkSong(loopOrder,loopRow,loopEnd);
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logI("loop point: %d %d",loopOrder,loopRow);
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int cmdPopularity[256];
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int delayPopularity[256];
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int sortedCmdPopularity[16];
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int sortedDelayPopularity[16];
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unsigned char sortedCmd[16];
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unsigned char sortedDelay[16];
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SafeWriter* chanStream[DIV_MAX_CHANS];
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unsigned int chanStreamOff[DIV_MAX_CHANS];
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bool wroteTick[DIV_MAX_CHANS];
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memset(cmdPopularity,0,256*sizeof(int));
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memset(delayPopularity,0,256*sizeof(int));
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memset(chanStream,0,DIV_MAX_CHANS*sizeof(void*));
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memset(chanStreamOff,0,DIV_MAX_CHANS*sizeof(unsigned int));
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memset(sortedCmdPopularity,0,16*sizeof(int));
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memset(sortedDelayPopularity,0,16*sizeof(int));
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memset(sortedCmd,0,16);
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memset(sortedDelay,0,16);
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SafeWriter* w=new SafeWriter;
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w->init();
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// write header
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w->write("FCS",4);
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w->writeI(chans);
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// offsets
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for (int i=0; i<chans; i++) {
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chanStream[i]=new SafeWriter;
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chanStream[i]->init();
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w->writeI(0);
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}
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// preset delays and speed dial
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for (int i=0; i<32; i++) {
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w->writeC(0);
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}
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// play the song ourselves
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bool done=false;
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playSub(false);
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int tick=0;
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bool oldCmdStreamEnabled=cmdStreamEnabled;
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cmdStreamEnabled=true;
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double curDivider=divider;
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int lastTick[DIV_MAX_CHANS];
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memset(lastTick,0,DIV_MAX_CHANS*sizeof(int));
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while (!done) {
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if (nextTick(false,true) || !playing) {
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done=true;
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break;
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}
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// get command stream
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memset(wroteTick,0,DIV_MAX_CHANS*sizeof(bool));
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if (curDivider!=divider) {
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curDivider=divider;
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WRITE_TICK(0);
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chanStream[0]->writeC(0xfb);
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chanStream[0]->writeI((int)(curDivider*65536));
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}
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for (DivCommand& i: cmdStream) {
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switch (i.cmd) {
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// strip away hinted/useless commands
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case DIV_CMD_GET_VOLUME:
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break;
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case DIV_CMD_VOLUME:
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break;
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case DIV_CMD_NOTE_PORTA:
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break;
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case DIV_CMD_LEGATO:
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break;
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case DIV_CMD_PITCH:
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break;
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case DIV_CMD_PRE_NOTE:
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break;
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default:
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WRITE_TICK(i.chan);
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cmdPopularity[i.cmd]++;
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writePackedCommandValues(chanStream[i.chan],i);
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break;
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}
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}
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cmdStream.clear();
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tick++;
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}
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memset(wroteTick,0,DIV_MAX_CHANS*sizeof(bool));
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for (int i=0; i<chans; i++) {
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WRITE_TICK(i);
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}
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cmdStreamEnabled=oldCmdStreamEnabled;
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int sortCand=-1;
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int sortPos=0;
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while (sortPos<16) {
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sortCand=-1;
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for (int i=DIV_CMD_SAMPLE_MODE; i<256; i++) {
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if (cmdPopularity[i]) {
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if (sortCand==-1) {
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sortCand=i;
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} else if (cmdPopularity[sortCand]<cmdPopularity[i]) {
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sortCand=i;
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}
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}
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}
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if (sortCand==-1) break;
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sortedCmdPopularity[sortPos]=cmdPopularity[sortCand];
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sortedCmd[sortPos]=sortCand;
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cmdPopularity[sortCand]=0;
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sortPos++;
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}
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sortCand=-1;
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sortPos=0;
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while (sortPos<16) {
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sortCand=-1;
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for (int i=0; i<256; i++) {
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if (delayPopularity[i]) {
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if (sortCand==-1) {
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sortCand=i;
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} else if (delayPopularity[sortCand]<delayPopularity[i]) {
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sortCand=i;
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}
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}
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}
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if (sortCand==-1) break;
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sortedDelayPopularity[sortPos]=delayPopularity[sortCand];
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sortedDelay[sortPos]=sortCand;
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delayPopularity[sortCand]=0;
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sortPos++;
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}
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for (int i=0; i<chans; i++) {
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chanStream[i]->writeC(0xff);
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// optimize stream
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SafeWriter* oldStream=chanStream[i];
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SafeReader* reader=oldStream->toReader();
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chanStream[i]=new SafeWriter;
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chanStream[i]->init();
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while (1) {
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try {
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unsigned char next=reader->readC();
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switch (next) {
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case 0xb8: // instrument
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case 0xc0: // pre porta
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case 0xc3: // vibrato range
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case 0xc4: // vibrato shape
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case 0xc5: // pitch
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case 0xc7: // volume
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case 0xca: // legato
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chanStream[i]->writeC(next);
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next=reader->readC();
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chanStream[i]->writeC(next);
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break;
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case 0xbe: // panning
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case 0xc2: // vibrato
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case 0xc6: // arpeggio
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case 0xc8: // vol slide
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case 0xc9: // porta
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chanStream[i]->writeC(next);
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next=reader->readC();
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chanStream[i]->writeC(next);
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next=reader->readC();
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chanStream[i]->writeC(next);
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break;
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case 0xf0: { // full command (pre)
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unsigned char cmd=reader->readC();
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bool foundShort=false;
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for (int j=0; j<16; j++) {
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if (sortedCmd[j]==cmd) {
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chanStream[i]->writeC(0xd0+j);
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foundShort=true;
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break;
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}
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}
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if (!foundShort) {
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chanStream[i]->writeC(0xf7); // full command
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chanStream[i]->writeC(cmd);
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}
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unsigned char cmdLen=reader->readC();
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logD("cmdLen: %d",cmdLen);
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for (unsigned char j=0; j<cmdLen; j++) {
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next=reader->readC();
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chanStream[i]->writeC(next);
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}
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break;
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}
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case 0xfb: // tick rate
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chanStream[i]->writeC(next);
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next=reader->readC();
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chanStream[i]->writeC(next);
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next=reader->readC();
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chanStream[i]->writeC(next);
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next=reader->readC();
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chanStream[i]->writeC(next);
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next=reader->readC();
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chanStream[i]->writeC(next);
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break;
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case 0xfc: { // 16-bit wait
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unsigned short delay=reader->readS();
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bool foundShort=false;
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for (int j=0; j<16; j++) {
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if (sortedDelay[j]==delay) {
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chanStream[i]->writeC(0xe0+j);
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foundShort=true;
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break;
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}
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}
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if (!foundShort) {
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chanStream[i]->writeC(next);
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chanStream[i]->writeS(delay);
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}
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break;
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}
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case 0xfd: { // 8-bit wait
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unsigned char delay=reader->readC();
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bool foundShort=false;
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for (int j=0; j<16; j++) {
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if (sortedDelay[j]==delay) {
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chanStream[i]->writeC(0xe0+j);
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foundShort=true;
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break;
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}
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}
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if (!foundShort) {
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chanStream[i]->writeC(next);
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chanStream[i]->writeC(delay);
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}
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break;
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}
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default:
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chanStream[i]->writeC(next);
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break;
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}
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} catch (EndOfFileException& e) {
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break;
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}
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}
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oldStream->finish();
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delete oldStream;
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}
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for (int i=0; i<chans; i++) {
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chanStreamOff[i]=w->tell();
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logI("- %d: off %x size %ld",i,chanStreamOff[i],chanStream[i]->size());
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w->write(chanStream[i]->getFinalBuf(),chanStream[i]->size());
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chanStream[i]->finish();
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delete chanStream[i];
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}
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w->seek(8,SEEK_SET);
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for (int i=0; i<chans; i++) {
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w->writeI(chanStreamOff[i]);
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}
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logD("delay popularity:");
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for (int i=0; i<16; i++) {
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w->writeC(sortedDelay[i]);
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if (sortedDelayPopularity[i]) logD("- %d: %d",sortedDelay[i],sortedDelayPopularity[i]);
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}
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logD("command popularity:");
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for (int i=0; i<16; i++) {
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w->writeC(sortedCmd[i]);
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if (sortedCmdPopularity[i]) logD("- %s: %d",cmdName[sortedCmd[i]],sortedCmdPopularity[i]);
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}
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remainingLoops=-1;
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playing=false;
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freelance=false;
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extValuePresent=false;
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BUSY_END;
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return w;
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}
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