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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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.
*
* $URL$
* $Id$
*
*/
#include "common/scummsys.h"
#include "common/endian.h"
#include "common/stream.h"
#include "common/util.h"
#include "common/debug.h"
#include "sound/mods/maxtrax.h"
namespace Audio {
MaxTrax::MaxTrax(int rate, bool stereo)
: Paula(stereo, rate, rate/50), _patch(), _scores(), _numScores(), _microtonal() {
}
MaxTrax::~MaxTrax() {
stopMusic();
freePatches();
freeScores();
}
void MaxTrax::interrupt() {
}
void MaxTrax::stopMusic() {
}
void MaxTrax::freeScores() {
if (_scores) {
for (int i = 0; i < _numScores; ++i)
delete _scores[i].events;
delete _scores;
_scores = 0;
}
_numScores = 0;
memset(_microtonal, 0, sizeof(_microtonal));
}
void MaxTrax::freePatches() {
for (int i = 0; i < ARRAYSIZE(_patch); ++i) {
delete[] _patch[i].samplePtr;
delete[] _patch[i].attackPtr;
}
memset(_patch, 0, sizeof(_patch));
}
bool MaxTrax::load(Common::SeekableReadStream &musicData, bool loadScores, bool loadSamples) {
bool res = false;
stopMusic();
if (loadSamples)
freePatches();
if (loadScores)
freeScores();
// 0x0000: 4 Bytes Header "MXTX"
// 0x0004: uint16 tempo
// 0x0006: uint16 flags. bit0 = lowpassfilter, bit1 = attackvolume, bit15 = microtonal
if (musicData.readUint32BE() != 0x4D585458) {
warning("Maxtrax: File is not a Maxtrax Module");
return false;
}
_playerCtx.tempo = musicData.readUint16BE();
const uint16 flags = musicData.readUint16BE();
_playerCtx.filterOn = (flags & 1) != 0;
_playerCtx.handleVolume = (flags & 2) != 0;
debug("Header: MXTX %02X %02X", _playerCtx.tempo, flags);
if (loadScores && flags & (1 << 15)) {
debug("Song has microtonal");
for (int i = 0; i < ARRAYSIZE(_microtonal); ++i)
_microtonal[i] = musicData.readUint16BE();
}
int scoresLoaded = 0;
// uint16 number of Scores
const uint16 scoresInFile = musicData.readUint16BE();
if (loadScores) {
const uint16 scoremax = 128; // some variable which is set upon initialisation of player
const uint16 tempScores = MIN(scoresInFile, scoremax);
debug("#Scores: %d, loading # of scores: %d", scoresInFile, tempScores);
Score *curScore =_scores = new Score[tempScores];
for (int i = tempScores; i > 0; --i, ++curScore) {
const uint32 numEvents = musicData.readUint32BE();
Event *curEvent = curScore->events = new Event[numEvents];
for (int j = numEvents; j > 0; --j, ++curEvent) {
curEvent->command = musicData.readByte();
curEvent->parameter = musicData.readByte();
curEvent->startTime = musicData.readUint16BE();
curEvent->stopTime = musicData.readUint16BE();
}
curScore->numEvents = numEvents;
}
_numScores = scoresLoaded = tempScores;
}
if (false && !loadSamples)
return true;
// skip over remaining scores in file
for (int i = scoresInFile - scoresLoaded; i > 0; --i)
musicData.skip(musicData.readUint32BE() * 6);
for (int i = 0; i < _numScores; ++i)
outPutScore(_scores[i], i);
debug("samples start at filepos %08X", musicData.pos());
// uint16 number of Samples
const uint16 wavesInFile = musicData.readUint16BE();
if (loadSamples) {
for (int i = wavesInFile; i > 0; --i) {
// load disksample structure
const uint16 number = musicData.readUint16BE();
assert(number < ARRAYSIZE(_patch));
// pointer to samples needed?
Patch &curPatch = _patch[number];
curPatch.tune = musicData.readUint16BE();
curPatch.volume = musicData.readUint16BE();
curPatch.sampleOctaves = musicData.readUint16BE();
curPatch.sampleAttack = musicData.readUint32BE();
curPatch.sampleSustain = musicData.readUint32BE();
// each octave the number of samples doubles.
const uint32 totalSamples = (curPatch.sampleAttack + curPatch.sampleSustain) * ((1 << curPatch.sampleOctaves) - 1);
curPatch.attackLen = musicData.readUint16BE();
curPatch.releaseLen = musicData.readUint16BE();
const uint32 totalEnvs = curPatch.attackLen + curPatch.releaseLen;
debug("wave nr %d at %08X - %d octaves", number, musicData.pos(), curPatch.sampleOctaves);
// Allocate space for both attack and release Segment.
Envelope *envPtr = new Envelope[totalEnvs];
// Attack Segment
curPatch.attackPtr = envPtr;
// Release Segment
// curPatch.releasePtr = envPtr + curPatch.attackLen;
// Read Attack and Release Segments
for (int j = totalEnvs; j > 0; --j, ++envPtr) {
envPtr->duration = musicData.readUint16BE();
envPtr->volume = musicData.readUint16BE();
}
// read Samples
curPatch.samplePtr = new int8[totalSamples];
musicData.read(curPatch.samplePtr, totalSamples);
}
} else if (wavesInFile > 0){
uint32 skipLen = 3 * 2;
for (int i = wavesInFile; i > 0; --i) {
musicData.skip(skipLen);
const uint16 octaves = musicData.readUint16BE();
const uint32 attackLen = musicData.readUint32BE();
const uint32 sustainLen = musicData.readUint32BE();
const uint16 attackCount = musicData.readUint16BE();
const uint16 releaseCount = musicData.readUint16BE();
debug("wave nr %d at %08X", 0, musicData.pos());
skipLen = attackCount * 4 + releaseCount * 4
+ (attackLen + sustainLen) * ((1 << octaves) - 1)
+ 3 * 2;
}
musicData.skip(skipLen - 3 * 2);
}
debug("endpos %08X", musicData.pos());
return res;
}
} // End of namespace Audio
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