src/apps/mediaplayer/supplier/ProxyAudioSupplier.h

   1 /*
   2  * Copyright 2008 Stephan Aßmus <superstippi@gmx.de>
   3  * All Rights Reserved. Distributed under the terms of the MIT license.
   4  */
   5 #ifndef PROXY_AUDIO_SUPPLIER_H
   6 #define PROXY_AUDIO_SUPPLIER_H
   7
   8
   9 #include <Locker.h>
  10
  11 #include "AudioResampler.h"
  12 #include "AudioSupplier.h"
  13
  14
  15 class AudioTrackSupplier;
  16 class AudioVolumeConverter;
  17 class PlaybackManager;
  18
  19
  20 class ProxyAudioSupplier : public AudioSupplier {
  21 public:
  22                                                                 ProxyAudioSupplier(
  23                                                                         PlaybackManager* playbackManager);
  24         virtual                                         ~ProxyAudioSupplier();
  25
  26         // AudioSupplier interface
  27         virtual status_t                        GetFrames(void* buffer, int64 frameCount,
  28                                                                         bigtime_t startTime, bigtime_t endTime);
  29
  30         virtual bigtime_t                       InitialLatency() const;
  31         virtual void                            SetFormat(const media_format& format);
  32         virtual const media_format&     Format() const;
  33
  34         virtual status_t                        InitCheck() const;
  35
  36         // ProxyAudioSupplier
  37                         void                            SetSupplier(AudioTrackSupplier* supplier,
  38                                                                         float videoFrameRate);
  39                         void                            SetVolume(float volume);
  40                         float                           Volume();
  41
  42 private:
  43                         int64                           _AudioFrameForVideoFrame(int64 frame) const;
  44                         int64                           _VideoFrameForAudioFrame(int64 frame) const;
  45                         int64                           _AudioFrameForTime(bigtime_t time) const;
  46                         int64                           _VideoFrameForTime(bigtime_t time) const;
  47
  48                         void                            _ReadSilence(void* buffer, int64 frames) const;
  49                         void                            _ReverseFrames(void* buffer,
  50                                                                         int64 frames) const;
  51                         void*                           _SkipFrames(void* buffer, int64 frames) const;
  52
  53 private:
  54         mutable BLocker                         fSupplierLock;
  55
  56                         PlaybackManager*        fPlaybackManager;
  57                         float                           fVideoFrameRate;
  58                         float                           fVolume;
  59
  60                         AudioTrackSupplier*     fSupplier;
  61                         AudioReader*            fAdapter;
  62                         AudioVolumeConverter* fVolumeConverter;
  63                         AudioResampler          fAudioResampler;
  64 };
  65
  66
  67 #endif  // PROXY_AUDIO_SUPPLIER_H