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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"
#define ADLIB_CHANNEL_COUNT 9
namespace OPL {
class OPL;
}
namespace Xeen {
struct RegisterValue {
uint8 _regNum;
uint8 _value;
RegisterValue(int regNum, int value) {
_regNum = regNum; _value = value;
}
};
class Music {
struct Channel {
byte _outputLevel;
byte _scalingValue;
Channel() : _outputLevel(0), _scalingValue(0) {}
};
private:
static const byte OPERATOR1_INDEXES[ADLIB_CHANNEL_COUNT];
static const byte OPERATOR2_INDEXES[ADLIB_CHANNEL_COUNT];
private:
OPL::OPL *_opl;
Common::Mutex _driverMutex;
Common::Array<Channel> _channels;
Common::Queue<RegisterValue> _queue;
const byte *_effectsData;
Common::Array<uint16> _effectsOffsets;
const byte *_musicPtr1, *_musicPtr2;
bool _fieldF;
int _field109;
int _field10B;
byte _field10D[7];
int _field114;
int _field115;
int _field117;
bool _lowMusicIgnored;
private:
/**
* Loads effects data that was embedded in the music driver
*/
void loadEffectsData();
/**
* 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();
/**
* Updates any playing music
*/
void update();
/**
* Does a reset
*/
void reset();
/**
* Sets the frequency for an operator
*/
void setFrequency(byte operatorNum, uint frequency);
/**
* Sets the output level for a channel
*/
void setOutputLevel(byte channelNum, uint level);
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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