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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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef MM_SHARED_XEEN_SOUND_DRIVER_H
#define MM_SHARED_XEEN_SOUND_DRIVER_H
#include "audio/fmopl.h"
#include "audio/mixer.h"
#include "common/array.h"
#include "common/mutex.h"
#include "common/queue.h"
#include "common/stack.h"
#include "mm/shared/xeen/file.h"
#define CHANNEL_COUNT 9
// interrupt is every ~13.736ms, which is ~72.8 times a second
#define CALLBACKS_PER_SECOND 72.8f
namespace OPL {
class OPL;
}
namespace MM {
namespace Shared {
namespace Xeen {
enum MusicCommand {
STOP_SONG = 0, RESTART_SONG = 1, SET_VOLUME = 0x100, GET_STATUS = 0xFFE0
};
class SoundDriver;
typedef bool (SoundDriver:: *CommandFn)(const byte *&srcP, byte param);
/**
* Base class for sound drivers
*/
class SoundDriver {
protected:
struct Subroutine {
const byte *_returnP;
const byte *_jumpP;
Subroutine() : _returnP(nullptr), _jumpP(nullptr) {
}
Subroutine(const byte *returnP, const byte *endP) :
_returnP(returnP), _jumpP(endP) {
}
};
struct Channel {
bool _changeFrequency;
int _freqCtrChange;
int _freqChange;
int _freqCtr;
byte _volume;
byte _totalLevel;
bool _isFx;
uint _frequency;
Channel() : _changeFrequency(false), _freqCtr(0), _freqCtrChange(0),
_freqChange(0), _volume(0), _totalLevel(0), _frequency(0), _isFx(false) {
}
};
enum StreamType {
stMUSIC,
stFX,
stLAST
};
class Stream {
public:
Stream() {
}
Stream(const CommandFn *commands) : _playing(false), _countdownTimer(0), _dataPtr(nullptr), _startPtr(nullptr), _commands(commands) {
}
bool _playing;
int _countdownTimer;
const byte *_dataPtr;
const byte *_startPtr;
const CommandFn *_commands;
};
private:
static const CommandFn FX_COMMANDS[16];
static const CommandFn MUSIC_COMMANDS[16];
private:
Common::Stack<Subroutine> _musSubroutines, _fxSubroutines;
uint _frameCtr;
private:
/**
* Executes the next command
* @param srcP Command data pointer
* @returns If true, execution of commands for the current timer call stops
*/
bool command(const byte *&srcP);
Stream *tickStream();
protected:
Common::Array<Channel> _channels;
Stream _streams[stLAST];
protected:
/**
* Executes a series of commands until instructed to stop
*/
void execute();
// Music commands (with some also used by FX)
virtual bool musCallSubroutine(const byte *&srcP, byte param);
virtual bool musSetCountdown(const byte *&srcP, byte param);
virtual bool musSetInstrument(const byte *&srcP, byte param) = 0;
virtual bool cmdNoOperation(const byte *&srcP, byte param);
virtual bool musSetPitchWheel(const byte *&srcP, byte param) = 0;
virtual bool musSkipWord(const byte *&srcP, byte param);
virtual bool musSetPanning(const byte *&srcP, byte param) = 0;
virtual bool musFade(const byte *&srcP, byte param) = 0;
virtual bool musStartNote(const byte *&srcP, byte param) = 0;
virtual bool musSetVolume(const byte *&srcP, byte param) = 0;
virtual bool musInjectMidi(const byte *&srcP, byte param) = 0;
virtual bool musPlayInstrument(const byte *&srcP, byte param) = 0;
virtual bool cmdFreezeFrequency(const byte *&srcP, byte param) = 0;
virtual bool cmdChangeFrequency(const byte *&srcP, byte param) = 0;
virtual bool musEndSubroutine(const byte *&srcP, byte param);
// FX commands
virtual bool fxCallSubroutine(const byte *&srcP, byte param);
virtual bool fxSetCountdown(const byte *&srcP, byte param);
virtual bool fxSetInstrument(const byte *&srcP, byte param) = 0;
virtual bool fxSetVolume(const byte *&srcP, byte param) = 0;
virtual bool fxMidiReset(const byte *&srcP, byte param) = 0;
virtual bool fxMidiDword(const byte *&srcP, byte param) = 0;
virtual bool fxSetPanning(const byte *&srcP, byte param) = 0;
virtual bool fxChannelOff(const byte *&srcP, byte param) = 0;
virtual bool fxFade(const byte *&srcP, byte param) = 0;
virtual bool fxStartNote(const byte *&srcP, byte param) = 0;
virtual bool fxInjectMidi(const byte *&srcP, byte param) = 0;
virtual bool fxPlayInstrument(const byte *&srcP, byte param) = 0;
virtual bool fxEndSubroutine(const byte *&srcP, byte param);
/**
* Post-processing done when a pause countdown starts or is in progress
*/
virtual void pausePostProcess() = 0;
/**
* Does a reset of any sound effect
*/
virtual void resetFX() = 0;
public:
/**
* Constructor
*/
SoundDriver();
/**
* Destructor
*/
virtual ~SoundDriver();
/**
* Starts a special effect playing
*/
virtual void playFX(uint effectId, const byte *data);
/**
* Stop any playing FX
*/
void stopFX(bool force = false);
/**
* Plays a song
*/
virtual void playSong(const byte *data);
/**
* Executes special music command
*/
virtual int songCommand(uint commandId, byte musicVolume = 0, byte sfxVolume = 0);
/**
* Returns whether music is currently playing
*/
bool isPlaying() const {
return _streams[stMUSIC]._playing;
}
/**
* Sends SysEx message
*/
virtual void sysExMessage(const byte *&data) = 0;
};
} // namespace Xeen
} // namespace Shared
} // namespace MM
#endif
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