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audiocd.h

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2003-2005 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.
 *
 * $Header: /cvsroot/scummvm/scummvm/sound/audiocd.h,v 1.13.2.1 2005/10/18 02:11:26 sev Exp $
 *
 */

#ifndef SOUND_AUDIOCD_H
#define SOUND_AUDIOCD_H

#include "common/stdafx.h"
#include "common/scummsys.h"
#include "common/singleton.h"
#include "sound/mixer.h"

class DigitalTrackInfo {
public:
      virtual bool error() = 0;
      virtual void play(Audio::Mixer *mixer, Audio::SoundHandle *handle, int startFrame, int duration) = 0;
      virtual ~DigitalTrackInfo() { }
};


class AudioCDManager : public Common::Singleton<AudioCDManager> {
public:
      struct Status {
            bool playing;
            int track;
            int start;
            int duration;
            int numLoops;
      };

      void play(int track, int numLoops, int startFrame, int duration);
      void stop();
      bool isPlaying() const;

      void updateCD();

      Status getStatus() const;

private:
      friend class Common::Singleton<SingletonBaseType>;
      AudioCDManager();

      int getCachedTrack(int track);

private:
      /* used for emulated CD music */
      struct ExtStatus : Status {
            Audio::SoundHandle handle;
      };
      ExtStatus _cd;

      enum {
            CACHE_TRACKS = 10
      };
      int _cachedTracks[CACHE_TRACKS];
      DigitalTrackInfo *_trackInfo[CACHE_TRACKS];
      int _currentCache;

};

/** Shortcut for accessing the audio CD manager. */
#define AudioCD         AudioCDManager::instance()

#endif

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