[chrome.displaySource] Implement software based H.264 video encoder.

extensions/renderer/api/display_source/wifi_display/wifi_display_video_encoder.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef EXTENSIONS_RENDERER_API_DISPLAY_SOURCE_WIFI_DISPLAY_WIFI_DISPLAY_VIDEO_ENCODER_H_
 #define EXTENSIONS_RENDERER_API_DISPLAY_SOURCE_WIFI_DISPLAY_WIFI_DISPLAY_VIDEO_ENCODER_H_
 
 #include "base/memory/shared_memory.h"
 #include "extensions/renderer/api/display_source/wifi_display/wifi_display_media_encoder.h"
 #include "media/base/video_frame.h"
@@ skipping 47 matching lines @@
   // as an |encoded_callback|'s argument which is set via 'SetCallbacks'
   // method.
   void InsertRawVideoFrame(const scoped_refptr<media::VideoFrame>& video_frame,
                            base::TimeTicks reference_time);
 
   // Requests the next encoded frame to be an instantaneous decoding refresh
   // (IDR) picture.
   void RequestIDRPicture();
 
  protected:
+  // A factory method that creates a new encoder instance which uses OpenH264
+  // SVC encoder for encoding.
+  static void CreateSVC(const InitParameters& params,
+                        const VideoEncoderCallback& encoder_callback);
+
   // A factory method that creates a new encoder instance which uses Video
   // Encode Accelerator (VEA) for encoding.
   static void CreateVEA(const InitParameters& params,
                         const VideoEncoderCallback& encoder_callback);
+  static void OnCreatedVEA(const InitParameters& params,
+                           const VideoEncoderCallback& encoder_callback,
+                           scoped_refptr<WiFiDisplayVideoEncoder> vea_encoder);
 
   explicit WiFiDisplayVideoEncoder(
       scoped_refptr<base::SingleThreadTaskRunner> media_task_runner);
   ~WiFiDisplayVideoEncoder() override;
 
   virtual void InsertFrameOnMediaThread(
       scoped_refptr<media::VideoFrame> video_frame,
       base::TimeTicks reference_time,
       bool send_idr) = 0;
 
   scoped_refptr<base::SingleThreadTaskRunner> media_task_runner_;
   bool send_idr_;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_API_DISPLAY_SOURCE_WIFI_DISPLAY_WIFI_DISPLAY_VIDEO_ENCODER_H_