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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/sword1/music.h,v 1.14 2004/12/10 18:26:08 lavosspawn Exp $
 *
 */

#ifndef BSMUSIC_H
#define BSMUSIC_H

#include "scummsys.h"
#include "common/system.h"
#include "common/file.h"
#include "sound/audiostream.h"
#include "sound/rate.h"

class SoundMixer;

namespace Sword1 {

#define TOTAL_TUNES 270

#define WAVEHEADERSIZE 0x2C

enum MusicMode {
      MusicNone = 0,
      MusicWave,
      MusicMp3,
      MusicVorbis
};

class WaveAudioStream : public AudioStream {
public:
      WaveAudioStream(File *source, uint32 pSize);
      virtual ~WaveAudioStream();
      virtual int readBuffer(int16 *buffer, const int numSamples);
      virtual bool isStereo(void) const { return _isStereo; };
      virtual bool endOfData(void) const;
      virtual int getRate(void) const { return _rate; };
private:
      File  *_sourceFile;
      uint8 *_sampleBuf;
      uint32       _rate;
      bool   _isStereo;
      uint32   _samplesLeft;
      uint16       _bitsPerSample;
};

class MusicHandle : public AudioStream {
private:
      File _file;
      bool _looping;
      int32 _fading;
      int32 _fadeSamples;
      MusicMode _musicMode;
      AudioStream *_audioSource;
      AudioStream *createAudioSource(void);
public:
      MusicHandle() : _looping(false), _fading(0), _audioSource(NULL) {}
      virtual int readBuffer(int16 *buffer, const int numSamples);
      bool play(const char *filename, bool loop);
      void stop();
      void fadeUp();
      void fadeDown();
      bool streaming() const;
      int32 fading() { return _fading; }
      bool endOfData() const;
      bool endOfStream() const { return false; }
      bool isStereo() const;
      int getRate() const;
};

class Music : public AudioStream {
public:
      Music(OSystem *system, SoundMixer *pMixer);
      ~Music();
      void startMusic(int32 tuneId, int32 loopFlag);
      void fadeDown();
      void setVolume(uint8 volL, uint8 volR);
      void giveVolume(uint8 *volL, uint8 *volR);

      // AudioStream API
      int readBuffer(int16 *buffer, const int numSamples) {
            mixer(buffer, numSamples / 2);
            return numSamples;
      }
      bool isStereo() const { return true; }
      bool endOfData() const { return false; }
      int getRate() const { return _sampleRate; }

private:
      st_volume_t _volumeL, _volumeR;
      MusicHandle _handles[2];
      RateConverter *_converter[2];
      OSystem *_system;
      SoundMixer *_mixer;
      uint32 _sampleRate;
      OSystem::MutexRef _mutex;

      static void passMixerFunc(void *param, int16 *buf, uint len);
      void mixer(int16 *buf, uint32 len);

      static const char _tuneList[TOTAL_TUNES][8]; // in staticres.cpp
};

} // End of namespace Sword1 

#endif // BSMUSIC_H

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