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/* ScummVM - Scumm Interpreter
* Copyright (C) 2003-2004 The ScummVM project
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#ifndef MUSICBASE_H
#define MUSICBASE_H
#include "stdafx.h"
#include "common/scummsys.h"
#include "common/system.h"
class OSystem;
namespace Sky {
class Disk;
#define FILES_PER_SECTION 4
typedef struct {
bool doReInit, doStopMusic;
uint8 musicToProcess;
} Actions;
class ChannelBase {
public:
virtual void stopNote(void) = 0;
virtual uint8 process(uint16 aktTime) = 0;
virtual void updateVolume(uint16 pVolume) = 0;
virtual bool isActive(void) = 0;
private:
};
class MusicBase {
public:
MusicBase(Disk *pDisk, OSystem *system);
virtual ~MusicBase(void);
void loadSection(uint8 pSection);
void musicCommand(uint16 command);
void startMusic(uint16 param) { _onNextPoll.musicToProcess = param & 0xF; }; // 4
bool musicIsPlaying(void);
virtual void setVolume(uint8 volume) = 0;
uint8 giveVolume(void) { return (uint8)_musicVolume; };
uint8 giveCurrentMusic(void) { return _currentMusic; };
protected:
OSystem *_system;
Disk *_skyDisk;
uint8 *_musicData;
uint8 _allowedCommands;
uint16 _musicDataLoc;
uint16 _driverFileBase;
uint16 _musicVolume, _numberOfChannels;
uint8 _currentMusic, _currentSection;
uint8 _musicTempo0; // can be changed by music stream
uint8 _musicTempo1; // given once per music
uint32 _tempo; // calculated from musicTempo0 and musicTempo1
uint32 _aktTime;
Actions _onNextPoll;
ChannelBase *_channels[10];
OSystem::MutexRef _mutex;
virtual void setupPointers(void) = 0;
virtual void setupChannels(uint8 *channelData) = 0;
void updateTempo(void);
void loadNewMusic(void);
//- functions from CommandTable @0x90 (the main interface)
virtual void startDriver(void) = 0; // 0
void StopDriver(void); // 1
void setTempo(uint16 newTempo); // 2
void pollMusic(); // 3
void reinitFM(void) { _onNextPoll.doReInit = true; }; // 6
void stopMusic(); // 7
void setFMVolume(uint16 param); // 13
};
} // End of namespace Sky
#endif //MUSICBASE_H
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