furnace/src/engine/wavetable.cpp
2023-01-19 19:18:40 -05:00

172 lines
3.9 KiB
C++

/**
* Furnace Tracker - multi-system chiptune tracker
* Copyright (C) 2021-2023 tildearrow and contributors
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "dataErrors.h"
#include "engine.h"
#include "wavetable.h"
#include "../ta-log.h"
#include "../fileutils.h"
void DivWavetable::putWaveData(SafeWriter* w) {
size_t blockStartSeek, blockEndSeek;
w->write("WAVE",4);
blockStartSeek=w->tell();
w->writeI(0);
w->writeC(0); // name
w->writeI(len);
w->writeI(min);
w->writeI(max);
for (int j=0; j<len; j++) {
w->writeI(data[j]);
}
blockEndSeek=w->tell();
w->seek(blockStartSeek,SEEK_SET);
w->writeI(blockEndSeek-blockStartSeek-4);
w->seek(0,SEEK_END);
}
DivDataErrors DivWavetable::readWaveData(SafeReader& reader, short version) {
char magic[4];
reader.read(magic,4);
if (memcmp(magic,"WAVE",4)!=0) {
logV("header is invalid: %c%c%c%c",magic[0],magic[1],magic[2],magic[3]);
return DIV_DATA_INVALID_HEADER;
}
reader.readI(); // reserved
reader.readString(); // ignored for now
len=reader.readI();
min=reader.readI();
max=reader.readI();
if (len>256) {
logE("invalid len: %d",len);
return DIV_DATA_INVALID_DATA;
}
if (min!=0) {
logW("invalid min %d",min);
min=0;
}
if (max>255) {
logW("invalid max %d",max);
max=255;
}
for (int i=0; i<len; i++) {
data[i]=reader.readI();
}
return DIV_DATA_SUCCESS;
}
bool DivWavetable::save(const char* path) {
SafeWriter* w=new SafeWriter();
w->init();
// write magic
w->write("-Furnace waveta-",16);
// write version
w->writeS(DIV_ENGINE_VERSION);
// reserved
w->writeS(0);
putWaveData(w);
FILE* outFile=ps_fopen(path,"wb");
if (outFile==NULL) {
logE("could not save wavetable: %s!",strerror(errno));
w->finish();
return false;
}
if (fwrite(w->getFinalBuf(),1,w->size(),outFile)!=w->size()) {
logW("did not write entire wavetable!");
}
fclose(outFile);
w->finish();
return true;
}
bool DivWavetable::saveDMW(const char* path) {
SafeWriter* w=new SafeWriter();
w->init();
// write width
w->writeI(len);
// check height
w->writeC(max);
if (max==255) {
// write as new format (because 0xff means that)
w->writeC(1); // format version
w->writeC(max); // actual height
// waveform data
for (int i=0; i<len; i++) {
w->writeI(data[i]&0xff);
}
} else {
// write as old format
for (int i=0; i<len; i++) {
w->writeC(data[i]);
}
}
FILE* outFile=ps_fopen(path,"wb");
if (outFile==NULL) {
logE("could not save wavetable: %s!",strerror(errno));
w->finish();
return false;
}
if (fwrite(w->getFinalBuf(),1,w->size(),outFile)!=w->size()) {
logW("did not write entire wavetable!");
}
fclose(outFile);
w->finish();
return true;
}
bool DivWavetable::saveRaw(const char* path) {
SafeWriter* w=new SafeWriter();
w->init();
// waveform data
for (int i=0; i<len; i++) {
w->writeC(data[i]);
}
FILE* outFile=ps_fopen(path,"wb");
if (outFile==NULL) {
logE("could not save wavetable: %s!",strerror(errno));
w->finish();
return false;
}
if (fwrite(w->getFinalBuf(),1,w->size(),outFile)!=w->size()) {
logW("did not write entire wavetable!");
}
fclose(outFile);
w->finish();
return true;
}