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music.h

/* 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: /cvsroot/scummvm/scummvm/queen/music.h,v 1.15 2004/10/22 23:44:08 sev Exp $
 *
 */

#ifndef QUEENMUSIC_H
#define QUEENMUSIC_H

#include "common/util.h"
#include "sound/mididrv.h"

class MidiParser;

namespace Queen {

class QueenEngine;

class MusicPlayer : public MidiDriver {
public:
      MusicPlayer(MidiDriver *driver, byte *data, uint32 size);
      ~MusicPlayer();
      void setVolume(int volume);
      int getVolume()               { return _masterVolume; }
      
      void hasNativeMT32(bool b)    { _nativeMT32 = b; }
      void playMusic();
      void stopMusic();
      void setLoop(bool loop)       { _looping = loop; }
      void queueTuneList(int16 tuneList);
      bool queueSong(uint16 songNum);
      void queueClear();
      void setPassThrough(bool b)         { _passThrough = b; }
      
      //MidiDriver interface implementation
      int open();
      void close();
      void send(uint32 b);
      
      void metaEvent(byte type, byte *data, uint16 length);
      
      void setTimerCallback(void *timerParam, void (*timerProc)(void *)) { }
      uint32 getBaseTempo(void)     { return _driver ? _driver->getBaseTempo() : 0; }
      
      //Channel allocation functions
      MidiChannel *allocateChannel()            { return 0; }
      MidiChannel *getPercussionChannel() { return 0; }
      
protected:

      enum {
            MUSIC_QUEUE_SIZE  =     14
      };

      void queueUpdatePos();
      uint8 randomQueuePos();
      static void onTimer(void *data);
      uint32 songOffset(uint16 songNum) const;
      uint32 songLength(uint16 songNum) const;

      MidiDriver *_driver;
      MidiParser *_parser;
      MidiChannel *_channel[16];
      byte _channelVolume[16];
      bool _nativeMT32;
      bool _passThrough;
      
      Common::RandomSource _rnd;
                        
      bool _isPlaying;
      bool _looping;
      bool _randomLoop;
      byte _masterVolume;
      uint8 _queuePos;
      int16 _currentSong;
      int16 _lastSong;  //first song from previous queue
      int16 _songQueue[MUSIC_QUEUE_SIZE];
      
      uint16 _numSongs;
      byte *_musicData;
      uint16 *_buf;
      uint32 _musicDataSize;
};
      
class Music {
public:
      Music(MidiDriver *_driver, QueenEngine *vm);
      ~Music();
      void hasNativeMT32(bool b)          { _player->hasNativeMT32(b); }
      void playSong(uint16 songNum);
      void queueTuneList(int16 tuneList)  { _player->queueTuneList(tuneList); }
      void playMusic()              { _player->playMusic(); }
      void stopSong()                     { _player->stopMusic(); }
      void setPassThrough(bool b)         { _player->setPassThrough(b); }

      void toggleVChange();   
      void setVolume(int vol)             { _player->setVolume(vol); }
      int volume()                        { return _player->getVolume(); }
      
protected:
      bool _vToggle;
      byte *_musicData;
      uint32 _musicDataSize;
      MusicPlayer *_player;
};

} // End of namespace Queen

#endif

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