source: orxonox.OLD/trunk/src/lib/sound/ogg_player.h @ 7660

/*!
 * @file ogg_player.h
 * Ogg-Player definition
 */


#ifndef _OGG_PLAYER_H
#define _OGG_PLAYER_H

#include "base_object.h"

#include "alincl.h"
#include <ogg/ogg.h>
#include <vorbis/vorbisfile.h>
#include "threading.h"

struct File;


#define OGG_PLAYER_BUFFER_SIZE (8096 * 2)

namespace OrxSound
{
  // the definition of a Ogg-Player
  class OggPlayer : public BaseObject
  {
  public:
    /**
     * An enumerator defining in what State the OggPlayer is.
     * The OggPlayer can be in multiple States listed here.
     * It can as an example be in FileOpened and Stopped.
     */
    typedef enum {
      None                   = 0x000,   //!< Initialized
      FileOpened             = 0x100,   //!< File is Opened
      SourceAllocated        = 0x200,   //!< Source is Allocated.
      BuffersAllocated       = 0x400,   //!< 2 Buffers are Allocated.
      Stopped                = 0x010,   //!< OggPlayer is stopped.
      Playing                = 0x020,   //!< OggPlayer is Playing.
      Paused                 = 0x040,   //!< OggPlayer is Paused.
      Error                  = 0x001,   //!< An Error has occured.
    } State;

    OggPlayer(const std::string& fileName = "");
    virtual ~OggPlayer();
    /** @param state compare this State with the internal State @returns true on match */
    bool operator==(OggPlayer::State state) { return this->state & state; };

    bool open(const std::string& fileName = "");

    bool play();
    void stop();
    void pause();
    void rewind(); // convenience
    void jumpTo(float timeCode);

    float length();
    bool isPlaying();
    bool getState() { return this->state; };

    void debug() const;
    void printState() const;
    const char* getVorbisError(int code);


  private:
    static int musicThread(void* oggPlayer);
    bool playback();
    void suspend();
    bool update();

    void release();

    bool stream(ALuint buffer);
    void empty();

  private:
    FILE*               oggFile;              //!< general file-handler, to open the sound-file
    OggVorbis_File      oggStream;            //!< The stream this Ogg-player is playing back
    vorbis_info*        vorbisInfo;           //!< The information held in the opened ogg-file
    vorbis_comment*     vorbisComment;        //!< Comments about the ogg-file

    ALuint              buffers[2];           //!< buffers that handle sequentially buffering of the audio
    ALuint              source;               //!< The source we play back on
    ALenum              format;               //!< The format we play back
    unsigned int        state;                //!< The States the OggPlayer is in (this can be multiple entries from OggPlayer::State).

    SDL_Thread*         musicThreadID;        //!< The Thread in which music is Played back.
    SDL_mutex*          musicMutex;           //!< A Mutex so that the two threads do not interfere.
  };

}
#endif /* _OGG_PLAYER_H */