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/* ScummVM - Scumm Interpreter
* Copyright (C) 2006 The ScummVM project
* Original ADL-Player source Copyright (C) 2004 by Patrick Combet aka Dorian Gray
*
* 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.
*
* $URL$
* $Id$
*
*/
#ifndef GOB_MUSIC_H
#define GOB_MUSIC_H
#include "sound/audiostream.h"
#include "sound/mixer.h"
#include "sound/fmopl.h"
#include "common/mutex.h"
#include "gob/gob.h"
#include "gob/util.h"
namespace Gob {
class GobEngine;
// Emulation of the "Paula" Amiga music chip
class Paula: public Audio::AudioStream {
public:
Paula(GobEngine *vm, bool stereo = false, int intFreq = 0);
~Paula();
bool playing() const { return _playing; }
void setInterruptFreq(int freq) { _intFreq = freq; }
void clearVoice(int voice);
void clearVoices() { int i; for (i = 0; i < 4; i++) clearVoice(i); }
virtual void startPlay(void) {}
virtual void stopPlay(void) {}
virtual void pausePlay(bool pause) {}
// AudioStream API
int readBuffer(int16 *buffer, const int numSamples);
bool isStereo() const { return _stereo; }
bool endOfData() const { return _end; }
int getRate() const { return _rate; }
protected:
struct Channel {
int8 *data;
int8 *dataRepeat;
uint32 length;
uint32 lengthRepeat;
int16 period;
byte volume;
double offset;
byte panning; // For stereo mixing; 0: left, 1: right
} _voice[4];
int _rate;
int _intFreq;
int _curInt;
bool _stereo;
bool _end;
bool _playing;
GobEngine *_vm;
void mix(int16 *&buf, int8 data, int voice) {
if (_stereo) {
*buf++ += _voice[voice].panning == 0 ? 2 * _voice[voice].volume * data : 0;
*buf++ += _voice[voice].panning == 1 ? 2 * _voice[voice].volume * data : 0;
} else
*buf++ += _voice[voice].volume * data;
}
virtual void interrupt(void) {};
};
class Infogrames : public Paula {
public:
class Instruments {
public:
struct Sample {
int8 *data;
int8 *dataRepeat;
uint32 length;
uint32 lengthRepeat;
} _samples[32];
uint8 _count;
int8 *_sampleData;
Instruments();
~Instruments();
bool load(Common::SeekableReadStream &ins);
bool load(const char *ins) {
Common::File f;
if (f.open(ins))
return load(f);
return false;
}
};
Infogrames(GobEngine *vm, bool stereo = false);
~Infogrames();
Instruments *getInstruments(void) const { return _instruments; }
bool getRepeating(void) const { return _repCount != 0; }
void setRepeating (int32 repCount) { _repCount = repCount; }
void restart(void) { if (!_data || !_instruments) return; init(); _end = false; }
virtual void startPlay(void) { if (_data && _instruments) { restart(); _playing = true; } }
virtual void stopPlay(void) { _playing = false; }
virtual void pausePlay(bool pause) { _playing = !pause; }
bool load(Common::SeekableReadStream &dum);
bool load(const char *dum) {
Common::File f;
if (f.open(dum))
return load(f);
return false;
}
void unload(bool destroyInstruments = false);
template<typename T> bool loadInstruments(T ins) {
unload(true);
_instruments = new Instruments();
if (!_instruments->load(ins)) {
delete _instruments;
_instruments = 0;
return false;
}
return true;
}
protected:
Instruments *_instruments;
static const uint8 tickCount[];
static const uint16 periods[];
byte *_data;
int32 _repCount;
uint16 _volume;
int16 _period;
byte *_volSlideBlocks;
byte *_periodSlideBlocks;
byte *_subSong;
byte *_cmdBlocks;
uint8 _sample;
uint8 _speedCounter;
uint8 _speed;
uint8 _newVol;
uint8 _field_1E;
struct Slide {
int16 finetuneNeg;
int16 finetunePos;
byte *data;
int8 amount;
uint8 dataOffset;
uint8 flags; // 0: Apply finetune modifier, 2: Don't slide, 7: Continuous
uint8 curDelay1;
uint8 curDelay2;
};
struct Channel {
byte *cmdBlockIndices;
byte *cmds;
byte *cmdBlocks;
Slide volSlide;
Slide periodSlide;
int16 curPeriod;
int16 period;
uint16 curCmdBlock;
uint16 flags; // 0: Need init, 5: Loop cmdBlocks, 6: Ignore channel
uint8 ticks;
uint8 tickCount;
int8 periodMod;
uint8 field_2B;
uint8 field_2C;
uint8 field_2F;
} _chn[4];
void init(void);
void reset(void);
void getNextSample(Channel &chn);
int16 tune(Slide &slide, int16 start) const;
virtual void interrupt(void);
};
class Adlib : public Audio::AudioStream {
public:
Adlib(GobEngine *vm);
virtual ~Adlib();
void lock() { _mutex.lock(); }
void unlock() { _mutex.unlock(); }
bool playing() const { return _playing; }
bool getRepeating(void) const { return _repCount != 0; }
void setRepeating (int32 repCount) { _repCount = repCount; }
int getIndex(void) const { return _index; }
virtual void startPlay(void);
virtual void stopPlay(void) { _mutex.lock(); _playing = false; _mutex.unlock(); }
virtual void playTrack(const char *trackname);
virtual void playBgMusic(void);
virtual bool load(const char *filename);
virtual void load(byte *data, int index=-1);
virtual void unload(void);
// AudioStream API
int readBuffer(int16 *buffer, const int numSamples) {
premixerCall(buffer, numSamples / 2);
return numSamples;
}
bool isStereo() const { return true; }
bool endOfData() const { return false; }
int getRate() const { return _rate; }
protected:
static const char *_tracks[][2];
static const char *_trackFiles[];
static const unsigned char _operators[];
static const unsigned char _volRegNums [];
FM_OPL *_opl;
int _index;
byte *_data;
byte *_playPos;
uint32 _dataSize;
uint32 _rate;
short _freqs[25][12];
byte _notes[11];
byte _notCol[11];
byte _notLin[11];
bool _notOn[11];
byte _pollNotes[16];
uint32 _samplesTillPoll;
int32 _repCount;
bool _playing;
bool _first;
bool _ended;
bool _needFree;
Common::Mutex _mutex;
GobEngine *_vm;
void premixerCall(int16 *buf, uint len);
void writeOPL(byte reg, byte val);
void setFreqs(void);
void reset(void);
void setVoices();
void setVoice(byte voice, byte instr, bool set);
void setKey(byte voice, byte note, bool on, bool spec);
void setVolume(byte voice, byte volume);
void pollMusic(void);
};
class Adlib_Dummy: public Adlib {
public:
Adlib_Dummy(GobEngine *vm) : Adlib(vm) {}
virtual void startPlay(void) {};
virtual void stopPlay(void) {};
virtual void playTrack(const char *trackname) {};
virtual void playBgAdlib(void) {};
virtual bool load(const char *filename) { return true; }
virtual void load(byte *data, int index=-1) {}
virtual void unload(void) {};
virtual ~Adlib_Dummy() {};
};
} // End of namespace Gob
#endif
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