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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.
*
*/
#ifndef XEEN_MUSIC_H
#define XEEN_MUSIC_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"
#define CHANNEL_COUNT 9
namespace OPL {
class OPL;
}
namespace Xeen {
class MusicDriver;
typedef bool (MusicDriver::*CommandFn)(const byte *&srcP, byte param);
/**
* Base class for music drivers
*/
class MusicDriver {
struct Subroutine {
const byte *_returnP;
const byte *_jumpP;
Subroutine() : _returnP(nullptr), _jumpP(nullptr) {}
Subroutine(const byte *returnP, const byte *endP) :
_returnP(returnP), _jumpP(endP) {}
};
private:
static const CommandFn FX_COMMANDS[16];
static const CommandFn MUSIC_COMMANDS[16];
private:
Common::Stack<Subroutine> _musSubroutines, _fxSubroutines;
bool _field1E;
int _musCountdownTimer;
int _fxCountdownTimer;
bool _lowMusicIgnored;
const byte *_fxDataPtr, *_musDataPtr;
const byte *_fxStartPtr;
const byte *_musStartPtr;
bool _flags[CHANNEL_COUNT];
byte _field15C[CHANNEL_COUNT];
byte _field165[CHANNEL_COUNT];
byte _field177[CHANNEL_COUNT];
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);
protected:
bool _fieldF;
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 cmdClearFlag(const byte *&srcP, byte param);
virtual bool cmdWibbly(const byte *&srcP, byte param);
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);
virtual void postProcess() = 0;
/**
* Does a reset of any sound effect
*/
virtual void resetFX() = 0;
public:
/**
* Constructor
*/
MusicDriver();
/**
* Destructor
*/
virtual ~MusicDriver() {}
/**
* Starts an special effect playing
*/
void playFX(uint effectId, const byte *data);
};
class AdlibMusicDriver : public MusicDriver {
struct RegisterValue {
uint8 _regNum;
uint8 _value;
RegisterValue(int regNum, int value) {
_regNum = regNum; _value = value;
}
};
private:
static const byte OPERATOR1_INDEXES[CHANNEL_COUNT];
static const byte OPERATOR2_INDEXES[CHANNEL_COUNT];
static const uint WAVEFORMS[24];
private:
OPL::OPL *_opl;
Common::Queue<RegisterValue> _queue;
Common::Mutex _driverMutex;
byte _volumes[CHANNEL_COUNT];
byte _scalingValues[CHANNEL_COUNT];
const byte *_musInstrumentPtrs[16];
const byte *_fxInstrumentPtrs[16];
uint _frequencies[7];
int _field180;
int _field182;
int _volume;
private:
/**
* Initializes the state of the Adlib OPL driver
*/
void initialize();
/**
* Adds a register write to the pending queue that will be flushed
* out to the OPL on the next timer call
*/
void write(int reg, int val);
/**
* Timer function for OPL
*/
void onTimer();
/**
* Flushes any pending writes to the OPL
*/
void flush();
/**
* Resets all the output frequencies
*/
void resetFrequencies();
/**
* Sets the frequency for an operator
*/
void setFrequency(byte operatorNum, uint frequency);
/**
* Calculates the frequency for a note
*/
uint calcFrequency(byte note);
/**
* Sets the output level for a channel
*/
void setOutputLevel(byte channelNum, uint level);
/**
* Starts playing an instrument
*/
void playInstrument(byte channelNum, const byte *data);
protected:
virtual bool musSetInstrument(const byte *&srcP, byte param);
virtual bool musSetPitchWheel(const byte *&srcP, byte param);
virtual bool musSetPanning(const byte *&srcP, byte param);
virtual bool musFade(const byte *&srcP, byte param);
virtual bool musStartNote(const byte *&srcP, byte param);
virtual bool musSetVolume(const byte *&srcP, byte param);
virtual bool musInjectMidi(const byte *&srcP, byte param);
virtual bool musPlayInstrument(const byte *&srcP, byte param);
virtual bool fxSetInstrument(const byte *&srcP, byte param);
virtual bool fxSetVolume(const byte *&srcP, byte param);
virtual bool fxMidiReset(const byte *&srcP, byte param);
virtual bool fxMidiDword(const byte *&srcP, byte param);
virtual bool fxSetPanning(const byte *&srcP, byte param);
virtual bool fxChannelOff(const byte *&srcP, byte param);
virtual bool fxFade(const byte *&srcP, byte param);
virtual bool fxStartNote(const byte *&srcP, byte param);
virtual bool fxInjectMidi(const byte *&srcP, byte param);
virtual bool fxPlayInstrument(const byte *&srcP, byte param);
/**
* Does a reset of any sound effect
*/
virtual void resetFX();
public:
/**
* Constructor
*/
AdlibMusicDriver();
/**
* Destructor
*/
virtual ~AdlibMusicDriver();
};
class Music {
private:
MusicDriver *_musicDriver;
const byte *_effectsData;
Common::Array<uint16> _effectsOffsets;
private:
/**
* Loads effects data that was embedded in the music driver
*/
void loadEffectsData();
/**
* Updates any playing music
*/
void update();
protected:
Audio::Mixer *_mixer;
public:
Music(Audio::Mixer *mixer);
~Music();
/**
* Starts an effect playing
*/
void playEffect(uint effectId);
};
} // End of namespace Xeen
#endif /* XEEN_MUSIC_H */
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