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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.
*
* $URL$
* $Id$
*
*/
/**
* @file
* Sound decoder used in engines:
* - gob
*/
#ifndef SOUND_MODS_INFOGRAMES_H
#define SOUND_MODS_INFOGRAMES_H
#include "audio/mods/paula.h"
namespace Common {
class SeekableReadStream;
}
namespace Audio {
/** A player for the Infogrames/RobHubbard2 format */
class Infogrames : public Paula {
public:
class Instruments {
public:
Instruments();
template<typename T> Instruments(T ins) {
init();
bool result = load(ins);
assert(result);
}
~Instruments();
bool load(Common::SeekableReadStream &ins);
bool load(const char *ins);
void unload();
uint8 getCount() const { return _count; }
protected:
struct Sample {
int8 *data;
int8 *dataRepeat;
uint32 length;
uint32 lengthRepeat;
} _samples[32];
uint8 _count;
int8 *_sampleData;
void init();
friend class Infogrames;
};
Infogrames(Instruments &ins, bool stereo = false, int rate = 44100,
int interruptFreq = 0);
~Infogrames();
Instruments *getInstruments() const { return _instruments; }
bool getRepeating() const { return _repCount != 0; }
void setRepeating (int32 repCount) { _repCount = repCount; }
bool load(Common::SeekableReadStream &dum);
bool load(const char *dum);
void unload();
void restart() {
if (_data) {
// Use the mutex here to ensure we do not call init()
// while data is being read by the mixer thread.
_mutex.lock();
init();
startPlay();
_mutex.unlock();
}
}
protected:
Instruments *_instruments;
static const uint8 tickCount[];
static const uint16 periods[];
byte *_data;
int32 _repCount;
byte *_subSong;
byte *_cmdBlocks;
byte *_volSlideBlocks;
byte *_periodSlideBlocks;
uint8 _speedCounter;
uint8 _speed;
uint16 _volume;
int16 _period;
uint8 _sample;
struct Slide {
byte *data;
int8 amount;
uint8 dataOffset;
int16 finetuneNeg;
int16 finetunePos;
uint8 curDelay1;
uint8 curDelay2;
uint8 flags; // 0: Apply finetune modifier, 2: Don't slide, 7: Continuous
};
struct Channel {
byte *cmdBlockIndices;
byte *cmdBlocks;
byte *cmds;
uint8 ticks;
uint8 tickCount;
Slide volSlide;
Slide periodSlide;
int16 period;
int8 periodMod;
uint8 flags; // 0: Need init, 5: Loop cmdBlocks, 6: Ignore channel
} _chn[4];
void init();
void reset();
void getNextSample(Channel &chn);
int16 tune(Slide &slide, int16 start) const;
virtual void interrupt();
};
} // End of namespace Audio
#endif
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