src/content/renderer/pepper/pepper_media_stream_video_track_host.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 CONTENT_RENDERER_PEPPER_PEPPER_MEDIA_STREAM_VIDEO_TRACK_HOST_H_
   6 #define CONTENT_RENDERER_PEPPER_PEPPER_MEDIA_STREAM_VIDEO_TRACK_HOST_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "base/memory/weak_ptr.h"
  10 #include "content/public/renderer/media_stream_video_sink.h"
  11 #include "content/renderer/media/media_stream_video_source.h"
  12 #include "content/renderer/pepper/pepper_media_stream_track_host_base.h"
  13 #include "media/base/video_frame.h"
  14 #include "ppapi/c/ppb_video_frame.h"
  15 #include "ppapi/shared_impl/media_stream_video_track_shared.h"
  16 #include "third_party/WebKit/public/platform/WebMediaStreamTrack.h"
  17 #include "ui/gfx/size.h"
  18
  19 namespace content {
  20
  21 class PepperMediaStreamVideoTrackHost : public PepperMediaStreamTrackHostBase,
  22                                         public MediaStreamVideoSink,
  23                                         public MediaStreamVideoSource {
  24  public:
  25   // Input mode constructor.
  26   // In input mode, this class passes video frames from |track| to the
  27   // associated pepper plugin.
  28   PepperMediaStreamVideoTrackHost(RendererPpapiHost* host,
  29                                   PP_Instance instance,
  30                                   PP_Resource resource,
  31                                   const blink::WebMediaStreamTrack& track);
  32
  33   // Output mode constructor.
  34   // In output mode, this class passes video frames from the associated
  35   // pepper plugin to a newly created blink::WebMediaStreamTrack.
  36   PepperMediaStreamVideoTrackHost(RendererPpapiHost* host,
  37                                   PP_Instance instance,
  38                                   PP_Resource resource);
  39
  40   virtual bool IsMediaStreamVideoTrackHost() OVERRIDE;
  41
  42   blink::WebMediaStreamTrack track() { return track_; }
  43
  44  private:
  45
  46   virtual ~PepperMediaStreamVideoTrackHost();
  47
  48   void InitBuffers();
  49
  50   // PepperMediaStreamTrackHostBase overrides:
  51   virtual void OnClose() OVERRIDE;
  52   virtual int32_t OnHostMsgEnqueueBuffer(
  53       ppapi::host::HostMessageContext* context, int32_t index) OVERRIDE;
  54
  55   // Sends frame with |index| to |track_|.
  56   int32_t SendFrameToTrack(int32_t index);
  57
  58   void OnVideoFrame(const scoped_refptr<media::VideoFrame>& frame,
  59                     const media::VideoCaptureFormat& format,
  60                     const base::TimeTicks& estimated_capture_time);
  61
  62   // MediaStreamVideoSource overrides:
  63   virtual void GetCurrentSupportedFormats(
  64       int max_requested_width,
  65       int max_requested_height,
  66       double max_requested_frame_rate,
  67       const VideoCaptureDeviceFormatsCB& callback) OVERRIDE;
  68
  69   virtual void StartSourceImpl(
  70       const media::VideoCaptureParams& params,
  71       const VideoCaptureDeliverFrameCB& frame_callback) OVERRIDE;
  72
  73   virtual void StopSourceImpl() OVERRIDE;
  74
  75   // ResourceHost overrides:
  76   virtual void DidConnectPendingHostToResource() OVERRIDE;
  77
  78   // ResourceMessageHandler overrides:
  79   virtual int32_t OnResourceMessageReceived(
  80       const IPC::Message& msg,
  81       ppapi::host::HostMessageContext* context) OVERRIDE;
  82
  83   // Message handlers:
  84   int32_t OnHostMsgConfigure(
  85       ppapi::host::HostMessageContext* context,
  86       const ppapi::MediaStreamVideoTrackShared::Attributes& attributes);
  87
  88   void InitBlinkTrack();
  89   void OnTrackStarted(MediaStreamSource* source,
  90                       MediaStreamRequestResult result,
  91                       const blink::WebString& result_name);
  92
  93   blink::WebMediaStreamTrack track_;
  94
  95   // True if it has been added to |blink::WebMediaStreamTrack| as a sink.
  96   bool connected_;
  97
  98   // Number of buffers.
  99   int32_t number_of_buffers_;
 100
 101   // Size of frames which are received from MediaStreamVideoSink.
 102   gfx::Size source_frame_size_;
 103
 104   // Plugin specified frame size.
 105   gfx::Size plugin_frame_size_;
 106
 107   // Format of frames which are received from MediaStreamVideoSink.
 108   PP_VideoFrame_Format source_frame_format_;
 109
 110   // Plugin specified frame format.
 111   PP_VideoFrame_Format plugin_frame_format_;
 112
 113   // The size of frame pixels in bytes.
 114   uint32_t frame_data_size_;
 115
 116   // TODO(ronghuawu): Remove |type_| and split PepperMediaStreamVideoTrackHost
 117   // into 2 classes for read and write.
 118   TrackType type_;
 119   bool output_started_;
 120
 121   // Internal class used for delivering video frames on the IO-thread to
 122   // the MediaStreamVideoSource implementation.
 123   class FrameDeliverer;
 124   scoped_refptr<FrameDeliverer> frame_deliverer_;
 125
 126   base::WeakPtrFactory<PepperMediaStreamVideoTrackHost> weak_factory_;
 127
 128   DISALLOW_COPY_AND_ASSIGN(PepperMediaStreamVideoTrackHost);
 129 };
 130
 131 }  // namespace content
 132
 133 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_MEDIA_STREAM_VIDEO_TRACK_HOST_H_