src/kits/media/TrackReader.h

   1 /***********************************************************************
   2  * AUTHOR: Marcus Overhagen
   3  *   FILE: TrackReader.h
   4  *  DESCR: The undocumented BTrackReader class,
   5  *         used by BSound and the GameSound classes
   6  ***********************************************************************/
   7
   8 #if !defined(_TRACK_READER_H_)
   9 #define _TRACK_READER_H_
  10
  11 #include <MediaTrack.h>
  12
  13 class BMediaFile;
  14
  15 namespace BPrivate
  16 {
  17
  18 class BTrackReader
  19 {
  20 public:
  21         BTrackReader(BMediaTrack *, media_raw_audio_format const &);
  22         BTrackReader(BFile *, media_raw_audio_format const &);
  23         ~BTrackReader();
  24
  25         status_t        InitCheck();
  26         int64           CountFrames(void);
  27         int32           FrameSize(void);
  28         status_t        ReadFrames(void *in_buffer, int32 frame_count);
  29         status_t        SeekToFrame(int64 *in_out_frame);
  30
  31         BMediaTrack *                                   Track(void);
  32         const media_raw_audio_format &  Format(void) const;
  33
  34 private:
  35         void SetToTrack(BMediaTrack *track);
  36
  37 private:
  38         int32   fFrameSize;
  39         uint8 * fBuffer;
  40         int32   fBufferOffset;
  41         int32   fBufferUsedSize;
  42         BMediaFile *fMediaFile;
  43         BMediaTrack *fMediaTrack;
  44         media_raw_audio_format fFormat;
  45 };
  46
  47 }; //namespace BPrivate
  48
  49 #endif