95 lines
2.3 KiB
C++
95 lines
2.3 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 "dataErrors.h"
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#include "engine.h"
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#include "wavetable.h"
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#include "../ta-log.h"
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#include "../fileutils.h"
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void DivWavetable::putWaveData(SafeWriter* w) {
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size_t blockStartSeek, blockEndSeek;
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w->write("WAVE",4);
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blockStartSeek=w->tell();
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w->writeI(0);
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w->writeC(0); // name
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w->writeI(len);
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w->writeI(min);
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w->writeI(max);
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for (int j=0; j<len; j++) {
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w->writeI(data[j]);
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}
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blockEndSeek=w->tell();
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w->seek(blockStartSeek,SEEK_SET);
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w->writeI(blockEndSeek-blockStartSeek-4);
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w->seek(0,SEEK_END);
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}
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DivDataErrors DivWavetable::readWaveData(SafeReader& reader, short version) {
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char magic[4];
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reader.read(magic,4);
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if (memcmp(magic,"WAVE",4)!=0) {
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return DIV_DATA_INVALID_HEADER;
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}
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reader.readI(); // reserved
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reader.readString(); // ignored for now
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len=reader.readI();
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min=reader.readI();
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max=reader.readI();
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if (len>256 || min!=0 || max>255) return DIV_DATA_INVALID_DATA;
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reader.read(data,4*len);
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return DIV_DATA_SUCCESS;
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}
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bool DivWavetable::save(const char* path) {
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SafeWriter* w=new SafeWriter();
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w->init();
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// write magic
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w->write("-Furnace waveta-",16);
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// write version
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w->writeS(DIV_ENGINE_VERSION);
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// reserved
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w->writeS(0);
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putWaveData(w);
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FILE* outFile=ps_fopen(path,"wb");
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if (outFile==NULL) {
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logE("could not save wavetable: %s!",strerror(errno));
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w->finish();
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return false;
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}
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if (fwrite(w->getFinalBuf(),1,w->size(),outFile)!=w->size()) {
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logW("did not write entire wavetable!");
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}
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fclose(outFile);
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w->finish();
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return true;
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}
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