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/*
* Adplug - Replayer for many OPL2/OPL3 audio file formats.
* Copyright (C) 1999 - 2003 Simon Peter <dn.tlp@gmx.net>, et al.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* adtrack.cpp - Adlib Tracker 1.0 Loader by Simon Peter <dn.tlp@gmx.net>
*
* NOTES:
* The original Adlib Tracker 1.0 is behaving a little different from the
* official spec: The 'octave' integer from the instrument file is stored
* "minus 1" from the actual value, underflowing from 0 to 0xffff.
*
* I also noticed that my player is playing everything transposed a few tones
* higher than the original tracker. As far as i can see, my player perfectly
* follows the official spec, so it "must" be the tracker that does something
* wrong here...
*/
#include <stdlib.h>
#include <string.h>
#include "adtrack.h"
#include "debug.h"
/*** Public methods ***/
CPlayer *CadtrackLoader::factory(Copl *newopl)
{
return new CadtrackLoader(newopl);
}
bool CadtrackLoader::load(const std::string &filename, const CFileProvider &fp)
{
binistream *f = fp.open(filename); if(!f) return false;
binistream *instf;
char note[2];
unsigned short rwp;
unsigned char chp, octave, pnote = 0;
int i,j;
AdTrackInst myinst;
// file validation
if(!fp.extension(filename, ".sng") || fp.filesize(f) != 36000)
{ fp.close(f); return false; }
// check for instruments file
std::string instfilename(filename, 0, filename.find_last_of('.'));
instfilename += ".ins";
AdPlug_LogWrite("CadtrackLoader::load(,\"%s\"): Checking for \"%s\"...\n",
filename.c_str(), instfilename.c_str());
instf = fp.open(instfilename);
if(!instf || fp.filesize(instf) != 468) { if(instf) { fp.close(instf); } fp.close(f); return false; }
// give CmodPlayer a hint on what we're up to
realloc_patterns(1,1000,9); realloc_instruments(9); realloc_order(1);
init_trackord(); flags = NoKeyOn;
(*order) = 0; length = 1; restartpos = 0; bpm = 120; initspeed = 3;
// load instruments from instruments file
for(i=0;i<9;i++) {
for(j=0;j<2;j++) {
myinst.op[j].appampmod = instf->readInt(2);
myinst.op[j].appvib = instf->readInt(2);
myinst.op[j].maintsuslvl = instf->readInt(2);
myinst.op[j].keybscale = instf->readInt(2);
myinst.op[j].octave = instf->readInt(2);
myinst.op[j].freqrisevollvldn = instf->readInt(2);
myinst.op[j].softness = instf->readInt(2);
myinst.op[j].attack = instf->readInt(2);
myinst.op[j].decay = instf->readInt(2);
myinst.op[j].release = instf->readInt(2);
myinst.op[j].sustain = instf->readInt(2);
myinst.op[j].feedback = instf->readInt(2);
myinst.op[j].waveform = instf->readInt(2);
}
convert_instrument(i, &myinst);
}
fp.close(instf);
// load file
for(rwp=0;rwp<1000;rwp++)
for(chp=0;chp<9;chp++) {
// read next record
f->readString(note, 2); octave = f->readInt(1); f->ignore();
switch(*note) {
case 'C': if(note[1] == '#') pnote = 2; else pnote = 1; break;
case 'D': if(note[1] == '#') pnote = 4; else pnote = 3; break;
case 'E': pnote = 5; break;
case 'F': if(note[1] == '#') pnote = 7; else pnote = 6; break;
case 'G': if(note[1] == '#') pnote = 9; else pnote = 8; break;
case 'A': if(note[1] == '#') pnote = 11; else pnote = 10; break;
case 'B': pnote = 12; break;
case '\0':
if(note[1] == '\0')
tracks[chp][rwp].note = 127;
else {
fp.close(f);
return false;
}
break;
default: fp.close(f); return false;
}
if((*note) != '\0') {
tracks[chp][rwp].note = pnote + (octave * 12);
tracks[chp][rwp].inst = chp + 1;
}
}
fp.close(f);
rewind(0);
return true;
}
float CadtrackLoader::getrefresh()
{
return 18.2f;
}
/*** Private methods ***/
void CadtrackLoader::convert_instrument(unsigned int n, AdTrackInst *i)
{
// Carrier "Amp Mod / Vib / Env Type / KSR / Multiple" register
inst[n].data[2] = i->op[Carrier].appampmod ? 1 << 7 : 0;
inst[n].data[2] += i->op[Carrier].appvib ? 1 << 6 : 0;
inst[n].data[2] += i->op[Carrier].maintsuslvl ? 1 << 5 : 0;
inst[n].data[2] += i->op[Carrier].keybscale ? 1 << 4 : 0;
inst[n].data[2] += (i->op[Carrier].octave + 1) & 0xffff; // Bug in original tracker
// Modulator...
inst[n].data[1] = i->op[Modulator].appampmod ? 1 << 7 : 0;
inst[n].data[1] += i->op[Modulator].appvib ? 1 << 6 : 0;
inst[n].data[1] += i->op[Modulator].maintsuslvl ? 1 << 5 : 0;
inst[n].data[1] += i->op[Modulator].keybscale ? 1 << 4 : 0;
inst[n].data[1] += (i->op[Modulator].octave + 1) & 0xffff; // Bug in original tracker
// Carrier "Key Scaling / Level" register
inst[n].data[10] = (i->op[Carrier].freqrisevollvldn & 3) << 6;
inst[n].data[10] += i->op[Carrier].softness & 63;
// Modulator...
inst[n].data[9] = (i->op[Modulator].freqrisevollvldn & 3) << 6;
inst[n].data[9] += i->op[Modulator].softness & 63;
// Carrier "Attack / Decay" register
inst[n].data[4] = (i->op[Carrier].attack & 0x0f) << 4;
inst[n].data[4] += i->op[Carrier].decay & 0x0f;
// Modulator...
inst[n].data[3] = (i->op[Modulator].attack & 0x0f) << 4;
inst[n].data[3] += i->op[Modulator].decay & 0x0f;
// Carrier "Release / Sustain" register
inst[n].data[6] = (i->op[Carrier].release & 0x0f) << 4;
inst[n].data[6] += i->op[Carrier].sustain & 0x0f;
// Modulator...
inst[n].data[5] = (i->op[Modulator].release & 0x0f) << 4;
inst[n].data[5] += i->op[Modulator].sustain & 0x0f;
// Channel "Feedback / Connection" register
inst[n].data[0] = (i->op[Carrier].feedback & 7) << 1;
// Carrier/Modulator "Wave Select" registers
inst[n].data[8] = i->op[Carrier].waveform & 3;
inst[n].data[7] = i->op[Modulator].waveform & 3;
}
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