Simplify VideoEncoder interface.

remoting/codec/video_encoder_vp8.h

 // Copyright (c) 2012 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 REMOTING_CODEC_VIDEO_ENCODER_VP8_H_
 #define REMOTING_CODEC_VIDEO_ENCODER_VP8_H_
 
 #include "base/gtest_prod_util.h"
 #include "remoting/codec/video_encoder.h"
 #include "third_party/skia/include/core/SkRegion.h"
 
 typedef struct vpx_codec_ctx vpx_codec_ctx_t;
 typedef struct vpx_image vpx_image_t;
 
 namespace webrtc {
 class DesktopSize;
 }  // namespace webrtc
 
 namespace remoting {
 
 // A class that uses VP8 to perform encoding.
 class VideoEncoderVp8 : public VideoEncoder {
  public:
   VideoEncoderVp8();
   virtual ~VideoEncoderVp8();
 
   // VideoEncoder interface.
-  virtual void Encode(
-      const webrtc::DesktopFrame* frame,
-      const DataAvailableCallback& data_available_callback) OVERRIDE;
+  virtual scoped_ptr<VideoPacket> Encode(
+      const webrtc::DesktopFrame& frame) OVERRIDE;
 
  private:
   FRIEND_TEST_ALL_PREFIXES(VideoEncoderVp8Test, AlignAndClipRect);
 
   // Initialize the encoder. Returns true if successful.
   bool Init(const webrtc::DesktopSize& size);
 
   // Destroy the encoder.
   void Destroy();
 
   // Prepare |image_| for encoding. Write updated rectangles into
   // |updated_region|.
   //
   // TODO(sergeyu): Update this code to use webrtc::DesktopRegion.
-  void PrepareImage(const webrtc::DesktopFrame* frame,
+  void PrepareImage(const webrtc::DesktopFrame& frame,
                     SkRegion* updated_region);
 
   // Update the active map according to |updated_region|. Active map is then
   // given to the encoder to speed up encoding.
   void PrepareActiveMap(const SkRegion& updated_region);
 
   // True if the encoder is initialized.
   bool initialized_;
 
   scoped_ptr<vpx_codec_ctx_t> codec_;
   scoped_ptr<vpx_image_t> image_;
   scoped_ptr<uint8[]> active_map_;
   int active_map_width_;
   int active_map_height_;
   int last_timestamp_;
 
   // Buffer for storing the yuv image.
   scoped_ptr<uint8[]> yuv_image_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoEncoderVp8);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_CODEC_VIDEO_ENCODER_VP8_H_