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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_SOUND_DRIVER_ADLIB_H
#define XEEN_SOUND_DRIVER_ADLIB_H
#include "xeen/sound_driver.h"
namespace OPL {
class OPL;
}
namespace Xeen {
class SoundDriverAdlib : public SoundDriver {
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;
const byte *_musInstrumentPtrs[16];
const byte *_fxInstrumentPtrs[16];
int _field180;
int _field181;
int _field182;
int _musicVolume, _sfxVolume;
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, bool isFx);
/**
* Calculates the scaling/volume level to output based on sfx or music master volume
*/
byte calculateLevel(byte level, bool isFx);
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);
/**
* Post-processing done when a pause countdown starts or is in progress
*/
virtual void pausePostProcess();
/**
* Does a reset of any sound effect
*/
virtual void resetFX();
public:
/**
* Constructor
*/
SoundDriverAdlib();
/**
* Destructor
*/
virtual ~SoundDriverAdlib();
/**
* Starts an special effect playing
*/
virtual void playFX(uint effectId, const byte *data);
/**
* Plays a song
*/
virtual void playSong(const byte *data);
/**
* Executes special music command
*/
virtual int songCommand(uint commandId, byte musicVolume = 0, byte sfxVolume = 0);
};
} // End of namespace Xeen
#endif /* XEEN_SOUND_DRIVER_H */
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