media/cast/test/utility/in_process_receiver.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef MEDIA_CAST_TEST_IN_PROCESS_RECEIVER_H_
   6 #define MEDIA_CAST_TEST_IN_PROCESS_RECEIVER_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/memory/weak_ptr.h"
  11 #include "media/base/audio_bus.h"
  12 #include "media/cast/cast_config.h"
  13 #include "media/cast/transport/cast_transport_config.h"
  14
  15 namespace base {
  16 class TimeTicks;
  17 class WaitableEvent;
  18 }  // namespace base
  19
  20 namespace net {
  21 class IPEndPoint;
  22 }  // namespace net
  23
  24 namespace media {
  25
  26 class VideoFrame;
  27
  28 namespace cast {
  29
  30 class CastEnvironment;
  31 class CastReceiver;
  32
  33 namespace transport {
  34 class UdpTransport;
  35 }  // namespace transport
  36
  37 // Common base functionality for an in-process Cast receiver.  This is meant to
  38 // be subclassed with the OnAudioFrame() and OnVideoFrame() methods implemented,
  39 // so that the implementor can focus on what is to be done with the frames,
  40 // rather than on the boilerplate "glue" code.
  41 class InProcessReceiver {
  42  public:
  43   // Construct a receiver with the given configuration.  |remote_end_point| can
  44   // be left empty, if the transport should automatically mate with the first
  45   // remote sender it encounters.
  46   InProcessReceiver(const scoped_refptr<CastEnvironment>& cast_environment,
  47                     const net::IPEndPoint& local_end_point,
  48                     const net::IPEndPoint& remote_end_point,
  49                     const AudioReceiverConfig& audio_config,
  50                     const VideoReceiverConfig& video_config);
  51
  52   virtual ~InProcessReceiver();
  53
  54   // Convenience accessors.
  55   scoped_refptr<CastEnvironment> cast_env() const { return cast_environment_; }
  56   const AudioReceiverConfig& audio_config() const { return audio_config_; }
  57   const VideoReceiverConfig& video_config() const { return video_config_; }
  58
  59   // Begin delivering any received audio/video frames to the OnXXXFrame()
  60   // methods.
  61   virtual void Start();
  62
  63   // Destroy the sub-compontents of this class.
  64   // After this call, it is safe to destroy this object on any thread.
  65   virtual void Stop();
  66
  67  protected:
  68   // To be implemented by subclasses.  These are called on the Cast MAIN thread
  69   // as each frame is received.
  70   virtual void OnAudioFrame(scoped_ptr<AudioBus> audio_frame,
  71                             const base::TimeTicks& playout_time,
  72                             bool is_continuous) = 0;
  73   virtual void OnVideoFrame(const scoped_refptr<VideoFrame>& video_frame,
  74                             const base::TimeTicks& playout_time,
  75                             bool is_continuous) = 0;
  76
  77   // Helper method that creates |transport_| and |cast_receiver_|, starts
  78   // |transport_| receiving, and requests the first audio/video frame.
  79   // Subclasses may override to provide additional start-up functionality.
  80   virtual void StartOnMainThread();
  81
  82   // Helper method that destroys |transport_| and |cast_receiver_|.
  83   // Subclasses may override to provide additional start-up functionality.
  84   virtual void StopOnMainThread(base::WaitableEvent* event);
  85
  86   // Callback for the transport to notify of status changes.  A default
  87   // implementation is provided here that simply logs socket errors.
  88   virtual void UpdateCastTransportStatus(transport::CastTransportStatus status);
  89
  90  private:
  91   friend class base::RefCountedThreadSafe<InProcessReceiver>;
  92
  93   // CastReceiver callbacks that receive a frame and then request another.  See
  94   // comments for the callbacks defined in src/media/cast/cast_receiver.h for
  95   // argument description and semantics.
  96   void GotAudioFrame(scoped_ptr<AudioBus> audio_frame,
  97                      const base::TimeTicks& playout_time,
  98                      bool is_continuous);
  99   void GotVideoFrame(const scoped_refptr<VideoFrame>& video_frame,
 100                      const base::TimeTicks& playout_time,
 101                      bool is_continuous);
 102   void PullNextAudioFrame();
 103   void PullNextVideoFrame();
 104
 105   const scoped_refptr<CastEnvironment> cast_environment_;
 106   const net::IPEndPoint local_end_point_;
 107   const net::IPEndPoint remote_end_point_;
 108   const AudioReceiverConfig audio_config_;
 109   const VideoReceiverConfig video_config_;
 110
 111   scoped_ptr<transport::UdpTransport> transport_;
 112   scoped_ptr<CastReceiver> cast_receiver_;
 113
 114   // NOTE: Weak pointers must be invalidated before all other member variables.
 115   base::WeakPtrFactory<InProcessReceiver> weak_factory_;
 116
 117   DISALLOW_COPY_AND_ASSIGN(InProcessReceiver);
 118 };
 119
 120 }  // namespace cast
 121 }  // namespace media
 122
 123 #endif  // MEDIA_CAST_TEST_IN_PROCESS_RECEIVER_H_