src/audio/sound_manager.hpp

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//  SuperTux
//  Copyright (C) 2006 Matthias Braun <matze@braunis.de>
//
//  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 3 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, see <http://www.gnu.org/licenses/>.

#ifndef HEADER_SUPERTUX_AUDIO_SOUND_MANAGER_HPP
#define HEADER_SUPERTUX_AUDIO_SOUND_MANAGER_HPP

#include <map>
#include <string>
#include <vector>

#include <al.h>
#include <alc.h>

#include "math/vector.hpp"

class SoundFile;
class SoundSource;
class StreamSoundSource;
class OpenALSoundSource;

class SoundManager
{
public:
  SoundManager();
  virtual ~SoundManager();

  void enable_sound(bool sound_enabled);
  SoundSource* create_sound_source(const std::string& filename);
  void play(const std::string& name, const Vector& pos = Vector(-1, -1));
  void manage_source(SoundSource* source);
  void preload(const std::string& name);

  void set_listener_position(const Vector& position);
  void set_listener_velocity(const Vector& velocity);

  void enable_music(bool music_enabled);
  void play_music(const std::string& filename, bool fade = false);
  void stop_music(float fadetime = 0);

  bool is_music_enabled() { return music_enabled; }
  bool is_sound_enabled() { return sound_enabled; }

  bool is_audio_enabled() {
    return device != 0 && context != 0;
  }

  void update();

  /*
   * Tell soundmanager to call update() for stream_sound_source.
   */
  void register_for_update( StreamSoundSource* sss );
  /*
   * Unsubscribe from updates for stream_sound_source.
   */
  void remove_from_update( StreamSoundSource* sss );

private:
  friend class OpenALSoundSource;
  friend class StreamSoundSource;

  OpenALSoundSource* intern_create_sound_source(const std::string& filename);
  static ALuint load_file_into_buffer(SoundFile* file);
  static ALenum get_sample_format(SoundFile* file);

  void print_openal_version();
  void check_alc_error(const char* message);
  static void check_al_error(const char* message);

  ALCdevice* device;
  ALCcontext* context;
  bool sound_enabled;

  typedef std::map<std::string, ALuint> SoundBuffers;
  SoundBuffers buffers;
  typedef std::vector<OpenALSoundSource*> SoundSources;
  SoundSources sources;

  typedef std::vector<StreamSoundSource*> StreamSoundSources;
  StreamSoundSources update_list;

  StreamSoundSource* music_source;

  bool music_enabled;
  std::string current_music;

private:
  SoundManager(const SoundManager&);
  SoundManager& operator=(const SoundManager&);
};

#endif

/* EOF */

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