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sound.h

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2005-2006 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL: https://scummvm.svn.sourceforge.net/svnroot/scummvm/scummvm/tags/release-0-11-1/engines/lure/sound.h $
 * $Id: sound.h 30944 2008-02-23 22:50:18Z sev $
 *
 */

#ifndef LURE_SOUND_H
#define LURE_SOUND_H

#include "lure/luredefs.h"
#include "lure/disk.h"
#include "lure/memory.h"

#include "common/singleton.h"
#include "sound/mididrv.h"
#include "sound/mixer.h"

class MidiParser;

namespace Lure {

#define NUM_CHANNELS_OUTER 8
#define NUM_CHANNELS_INNER 16

struct ChannelEntry {
      MidiChannel *midiChannel;
      bool isMusic;
      uint8 volume;
};

class MidiMusic: public MidiDriver {
private:
      uint8 _soundNumber;
      uint8 _channelNumber;
      uint8 _numChannels;
      byte _volume;
      MemoryBlock *_decompressedSound;
      uint8 *_soundData;
      uint8 _soundSize;
      MidiDriver *_driver;
      MidiParser *_parser;
      ChannelEntry *_channels;
      bool _isPlaying;

      void queueUpdatePos();
      uint8 randomQueuePos();
      uint32 songOffset(uint16 songNum) const;
      uint32 songLength(uint16 songNum) const;

      bool _passThrough;

public:
      MidiMusic(MidiDriver *driver, ChannelEntry channels[NUM_CHANNELS_INNER], 
            uint8 channelNum, uint8 soundNum, bool isMusic, void *soundData, uint32 size);
      ~MidiMusic();
      void setVolume(int volume);
      int getVolume()   { return _volume; }

      void playSong(uint16 songNum);
      void stopSong() { stopMusic(); }
      void playMusic();
      void stopMusic();
      void queueTuneList(int16 tuneList);
      bool queueSong(uint16 songNum);
      void setPassThrough(bool b) { _passThrough = b; }
      void toggleVChange();

      //MidiDriver interface implementation
      int open();
      void close();
      void send(uint32 b);
      void onTimer();

      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; }

      uint8 channelNumber() { return _channelNumber; }
      uint8 soundNumber() { return _soundNumber; }
      bool isPlaying() { return _isPlaying; }
};

class SoundManager: public Common::Singleton<SoundManager> {
private:
      // Outer sound interface properties
      MemoryBlock *_descs;
      MemoryBlock *_soundData;
      uint8 _soundsTotal;
      int _numDescs;
      SoundDescResource *soundDescs() { return (SoundDescResource *) _descs->data(); }
      MidiDriver *_driver;
      ManagedList<SoundDescResource *> _activeSounds;
      ManagedList<MidiMusic *> _playingSounds;
      ChannelEntry _channelsInner[NUM_CHANNELS_INNER];
      bool _channelsInUse[NUM_CHANNELS_OUTER];
      bool _isPlaying;
      bool _nativeMT32;
      bool _isRoland;
      Common::MutexRef _soundMutex;
      bool _paused;

      // Internal support methods
      void bellsBodge();
      void musicInterface_TidySounds();
      static void onTimer(void *data);
      void doTimer();
public:
      SoundManager();
      ~SoundManager();

      void saveToStream(WriteStream *stream);
      void loadFromStream(ReadStream *stream);

      void loadSection(uint16 sectionId);
      void killSounds();
      void addSound(uint8 soundIndex, bool tidyFlag = true);
      void addSound2(uint8 soundIndex);
      void stopSound(uint8 soundIndex);
      void killSound(uint8 soundNumber);
      void setVolume(uint8 soundNumber, uint8 volume);
      void setVolume(uint8 volume);
      void tidySounds();
      uint8 descIndexOf(uint8 soundNumber);
      SoundDescResource *findSound(uint8 soundNumber);
      void removeSounds();
      void restoreSounds();
      void fadeOut();
      void pause() { _paused = true; }
      void resume() { _paused = false; }
      bool getPaused() { return _paused; }
      bool hasNativeMT32() { return _nativeMT32; }
      bool isRoland() { return _isRoland; }

      // The following methods implement the external sound player module
      void musicInterface_Initialise();
      void musicInterface_Play(uint8 soundNumber, uint8 channelNumber);
      void musicInterface_Stop(uint8 soundNumber);
      bool musicInterface_CheckPlaying(uint8 soundNumber);
      void musicInterface_SetVolume(uint8 channelNum, uint8 volume);
      void musicInterface_KillAll();
      void musicInterface_ContinuePlaying();
      void musicInterface_TrashReverb();
};

} // End of namespace Lure

#define Sound (::Lure::SoundManager::instance())

#endif

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