Cast: Flow hw encoder initialization error to extensions API

media/cast/sender/external_video_encoder.h

 // Copyright 2014 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 MEDIA_CAST_SENDER_EXTERNAL_VIDEO_ENCODER_H_
 #define MEDIA_CAST_SENDER_EXTERNAL_VIDEO_ENCODER_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "media/cast/cast_config.h"
@@ skipping 10 matching lines @@
 
 class LocalVideoEncodeAcceleratorClient;
 
 // This object is called external from the main cast thread and internally from
 // the video encoder thread.
 class ExternalVideoEncoder : public VideoEncoder {
  public:
   ExternalVideoEncoder(
       scoped_refptr<CastEnvironment> cast_environment,
       const VideoSenderConfig& video_config,
+      const CastInitializationCallback& initialization_cb,
       const CreateVideoEncodeAcceleratorCallback& create_vea_cb,
       const CreateVideoEncodeMemoryCallback& create_video_encode_mem_cb);
 
   virtual ~ExternalVideoEncoder();
 
   // Called from the main cast thread. This function post the encode task to the
   // video encoder thread;
   // The video_frame must be valid until the closure callback is called.
   // The closure callback is called from the video encoder thread as soon as
   // the encoder is done with the frame; it does not mean that the encoded frame
   // has been sent out.
   // Once the encoded frame is ready the frame_encoded_callback is called.
   virtual bool EncodeVideoFrame(
       const scoped_refptr<media::VideoFrame>& video_frame,
       const base::TimeTicks& capture_time,
       const FrameEncodedCallback& frame_encoded_callback) OVERRIDE;
 
   // The following functions are called from the main cast thread.
   virtual void SetBitRate(int new_bit_rate) OVERRIDE;
   virtual void GenerateKeyFrame() OVERRIDE;
   virtual void LatestFrameIdToReference(uint32 frame_id) OVERRIDE;
 
   // Called when video_accelerator_client_ has finished creating the VEA and
   // is ready for use.
   void OnCreateVideoEncodeAccelerator(
       scoped_refptr<base::SingleThreadTaskRunner> encoder_task_runner);
 
  protected:
-  void EncoderInitialized();
+  // If |success| is true then encoder is initialized successfully.
+  // Otherwise encoder initialization failed.
+  void EncoderInitialized(bool success);
   void EncoderError();
 
  private:
   friend class LocalVideoEncodeAcceleratorClient;
 
   VideoSenderConfig video_config_;
   scoped_refptr<CastEnvironment> cast_environment_;
 
   bool encoder_active_;
   bool key_frame_requested_;
 
   scoped_refptr<LocalVideoEncodeAcceleratorClient> video_accelerator_client_;
   scoped_refptr<base::SingleThreadTaskRunner> encoder_task_runner_;
 
+  CastInitializationCallback initialization_cb_;
+
   // Weak pointer factory for posting back LocalVideoEncodeAcceleratorClient
   // notifications to ExternalVideoEncoder.
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<ExternalVideoEncoder> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ExternalVideoEncoder);
 };
 
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_SENDER_EXTERNAL_VIDEO_ENCODER_H_