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music.h

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2004-2005 The ScummVM project
 *
 * The ReInherit Engine is (C)2000-2003 by Daniel Balsom.
 *
 * 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.
 *
 * $Header: /cvsroot/scummvm/scummvm/saga/music.h,v 1.27.2.1 2005/10/18 02:11:20 sev Exp $
 *
 */

// Music class

#ifndef SAGA_MUSIC_H_
#define SAGA_MUSIC_H_

#include "sound/audiocd.h"
#include "sound/mixer.h"
#include "sound/mididrv.h"
#include "sound/midiparser.h"

namespace Saga {

enum MusicFlags {
      MUSIC_NORMAL = 0,
      MUSIC_LOOP = 0x0001,
      MUSIC_DEFAULT = 0xffff
};

class MusicPlayer : public MidiDriver {
public:
      MusicPlayer(MidiDriver *driver);
      ~MusicPlayer();

      bool isPlaying() { return _isPlaying; }

      void setVolume(int volume);
      int getVolume() { return _masterVolume; }

      void setNativeMT32(bool b) { _nativeMT32 = b; }
      bool hasNativeMT32() { return _nativeMT32; }
      void playMusic();
      void stopMusic();
      void setLoop(bool loop) { _looping = loop; }
      void setPassThrough(bool b) { _passThrough = b; }

      void setGM(bool isGM) { _isGM = isGM; }

      //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; }

      MidiParser *_parser;

protected:

      static void onTimer(void *data);

      MidiChannel *_channel[16];
      MidiDriver *_driver;
      byte _channelVolume[16];
      bool _nativeMT32;
      bool _isGM;
      bool _passThrough;

      bool _isPlaying;
      bool _looping;
      bool _randomLoop;
      byte _masterVolume;

      byte *_musicData;
      uint16 *_buf;
      uint32 _musicDataSize;
};

class Music {
public:

      Music(SagaEngine *vm, Audio::Mixer *mixer, MidiDriver *driver, int enabled);
      ~Music(void);
      void setNativeMT32(bool b)    { _player->setNativeMT32(b); }
      bool hasNativeMT32()          { return _player->hasNativeMT32(); }
      void setAdlib(bool b)         { _adlib = b; }
      bool hasAdlib()               { return _adlib; }
      void setPassThrough(bool b)   { _player->setPassThrough(b); }
      bool isPlaying(void);

      void play(uint32 resourceId, MusicFlags flags = MUSIC_DEFAULT);
      void pause(void);
      void resume(void);
      void stop(void);

      void setVolume(int volume, int time = 1);
      int getVolume() { return _currentVolume; }

      int32 *_songTable;
      int _songTableLen;

private:
      SagaEngine *_vm;
      Audio::Mixer *_mixer;

      MusicPlayer *_player;
      Audio::SoundHandle _musicHandle;
      uint32 _trackNumber;

      int _enabled;
      bool _adlib;

      int _targetVolume;
      int _currentVolume;
      int _currentVolumePercent;

      ResourceContext *_musicContext;
      MidiParser *xmidiParser;
      MidiParser *smfParser;

      DigitalTrackInfo *_track;

      static void musicVolumeGaugeCallback(void *refCon);
      void musicVolumeGauge(void);
};

} // End of namespace Saga

#endif

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