mirror of
https://github.com/tildearrow/furnace.git
synced 2024-11-06 12:55:05 +00:00
135 lines
3.1 KiB
C++
135 lines
3.1 KiB
C++
/**
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* Furnace Tracker - multi-system chiptune tracker
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* Copyright (C) 2021-2022 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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static DivPattern emptyPat;
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DivPattern::DivPattern() {
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memset(data,-1,256*32*sizeof(short));
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for (int i=0; i<256; i++) {
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data[i][0]=0;
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data[i][1]=0;
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}
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}
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DivPattern* DivChannelData::getPattern(int index, bool create) {
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if (data[index]==NULL) {
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if (create) {
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data[index]=new DivPattern;
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} else {
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return &emptyPat;
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}
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}
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return data[index];
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}
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void DivChannelData::wipePatterns() {
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for (int i=0; i<256; i++) {
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if (data[i]!=NULL) {
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delete data[i];
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data[i]=NULL;
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}
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}
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}
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void DivPattern::copyOn(DivPattern *dest) {
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dest->name=name;
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memcpy(dest->data,data,sizeof(data));
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}
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SafeReader* DivPattern::compile(int len, int fxRows) {
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SafeWriter w;
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w.init();
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short lastNote, lastOctave, lastInstr, lastVolume, lastEffect[8], lastEffectVal[8];
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unsigned char rows=0;
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lastNote=0;
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lastOctave=0;
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lastInstr=-1;
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lastVolume=-1;
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memset(lastEffect,-1,8*sizeof(short));
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memset(lastEffectVal,-1,8*sizeof(short));
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for (int i=0; i<len; i++) {
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unsigned char mask=0;
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if (data[i][0]!=-1) {
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lastNote=data[i][0];
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lastOctave=data[i][1];
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mask|=128;
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}
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if (data[i][2]!=-1 && data[i][2]!=lastInstr) {
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lastInstr=data[i][2];
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mask|=32;
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}
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if (data[i][3]!=-1 && data[i][3]!=lastVolume) {
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lastVolume=data[i][3];
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mask|=64;
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}
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for (int j=0; j<fxRows; j++) {
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if (data[i][4+(j<<1)]!=-1) {
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lastEffect[j]=data[i][4+(j<<1)];
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lastEffectVal[j]=data[i][5+(j<<1)];
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mask=(mask&0xf8)|j;
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}
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}
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if (!mask) {
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rows++;
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continue;
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}
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if (rows!=0) {
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w.writeC(rows);
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}
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rows=1;
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w.writeC(mask);
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if (mask&128) {
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if (lastNote==100) {
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w.writeC(-128);
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} else {
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w.writeC(lastNote+(lastOctave*12));
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}
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}
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if (mask&64) {
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w.writeC(lastVolume);
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}
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if (mask&32) {
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w.writeC(lastInstr);
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}
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for (int j=0; j<(mask&7); j++) {
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w.writeC(lastEffect[j]);
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if (lastEffectVal[j]==-1) {
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w.writeC(0);
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} else {
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w.writeC(lastEffectVal[j]);
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}
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}
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}
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w.writeC(rows);
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w.writeC(0);
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return w.toReader();
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}
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DivChannelData::DivChannelData():
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effectCols(1) {
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memset(data,0,256*sizeof(void*));
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}
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