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