src/apps/mediaplayer/media_node_framework/audio/AudioSupplier.h

   1 /*      Copyright 2000-2008, Ingo Weinhold <ingo_weinhold@gmx.de>,
   2  *      All Rights Reserved. Distributed under the terms of the MIT license.
   3  */
   4 #ifndef AUDIO_SUPPLIER_H
   5 #define AUDIO_SUPPLIER_H
   6
   7
   8 /*!     This class is an interface used by the AudioProducer to retreive the
   9         audio data to be played. */
  10
  11
  12 #include <MediaDefs.h>
  13
  14
  15 class AudioProducer;
  16
  17 class AudioSupplier {
  18 public:
  19                                                                 AudioSupplier();
  20         virtual                                         ~AudioSupplier();
  21
  22         virtual void                            SetAudioProducer(AudioProducer* producer);
  23
  24         virtual status_t                        InitCheck() const;
  25
  26         virtual bigtime_t                       InitialLatency() const = 0;
  27
  28         virtual status_t                        GetFrames(void* buffer, int64 frameCount,
  29                                                                         bigtime_t startTime,
  30                                                                         bigtime_t endTime) = 0;
  31
  32         virtual void                            SetFormat(const media_format& format) = 0;
  33
  34 protected:
  35         AudioProducer*                          fAudioProducer;
  36 };
  37
  38
  39 #endif  // AUDIO_SUPPLIER_H