Add VideoProcessor interface.

remoting/client/rectangle_update_decoder.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_CLIENT_RECTANGLE_UPDATE_DECODER_H_
-#define REMOTING_CLIENT_RECTANGLE_UPDATE_DECODER_H_
-
-#include <list>
-
-#include "base/callback_forward.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "remoting/codec/video_decoder.h"
-#include "remoting/client/chromoting_stats.h"
-#include "remoting/client/frame_consumer_proxy.h"
-#include "remoting/client/frame_producer.h"
-#include "remoting/protocol/video_stub.h"
-#include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
-
-namespace base {
-class SingleThreadTaskRunner;
-}  // namespace base
-
-namespace remoting {
-
-class ChromotingStats;
-
-namespace protocol {
-class SessionConfig;
-}  // namespace protocol
-
-// TODO(ajwong): Re-examine this API, especially with regards to how error
-// conditions on each step are reported.  Should they be CHECKs? Logs? Other?
-// TODO(sergeyu): Rename this class.
-class RectangleUpdateDecoder
-    : public base::RefCountedThreadSafe<RectangleUpdateDecoder>,
-      public FrameProducer,
-      public protocol::VideoStub {
- public:
-  // Creates an update decoder on |main_task_runner_| and |decode_task_runner_|,
-  // outputting to |consumer|. The |main_task_runner_| is responsible for
-  // receiving and queueing packets. The |decode_task_runner_| is responsible
-  // for decoding the video packets.
-  // TODO(wez): Replace the ref-counted proxy with an owned FrameConsumer.
-  RectangleUpdateDecoder(
-      scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
-      scoped_refptr<base::SingleThreadTaskRunner> decode_task_runner,
-      scoped_refptr<FrameConsumerProxy> consumer);
-
-  // Initializes decoder with the information from the protocol config.
-  void Initialize(const protocol::SessionConfig& config);
-
-  // FrameProducer implementation.  These methods may be called before we are
-  // Initialize()d, or we know the source screen size.
-  virtual void DrawBuffer(webrtc::DesktopFrame* buffer) OVERRIDE;
-  virtual void InvalidateRegion(const webrtc::DesktopRegion& region) OVERRIDE;
-  virtual void RequestReturnBuffers(const base::Closure& done) OVERRIDE;
-  virtual void SetOutputSizeAndClip(
-      const webrtc::DesktopSize& view_size,
-      const webrtc::DesktopRect& clip_area) OVERRIDE;
-  virtual const webrtc::DesktopRegion* GetBufferShape() OVERRIDE;
-
-  // VideoStub implementation.
-  virtual void ProcessVideoPacket(scoped_ptr<VideoPacket> packet,
-                                  const base::Closure& done) OVERRIDE;
-
-  // Return the stats recorded by this client.
-  ChromotingStats* GetStats();
-
- private:
-  friend class base::RefCountedThreadSafe<RectangleUpdateDecoder>;
-  virtual ~RectangleUpdateDecoder();
-
-  // Paints the invalidated region to the next available buffer and returns it
-  // to the consumer.
-  void SchedulePaint();
-  void DoPaint();
-
-  // Decodes the contents of |packet|. DecodePacket may keep a reference to
-  // |packet| so the |packet| must remain alive and valid until |done| is
-  // executed.
-  void DecodePacket(scoped_ptr<VideoPacket> packet, const base::Closure& done);
-
-  // Callback method when a VideoPacket is processed. |decode_start| contains
-  // the timestamp when the packet will start to be processed.
-  void OnPacketDone(base::Time decode_start, const base::Closure& done);
-
-  scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
-  scoped_refptr<base::SingleThreadTaskRunner> decode_task_runner_;
-  scoped_refptr<FrameConsumerProxy> consumer_;
-  scoped_ptr<VideoDecoder> decoder_;
-
-  // Remote screen size in pixels.
-  webrtc::DesktopSize source_size_;
-
-  // Vertical and horizontal DPI of the remote screen.
-  webrtc::DesktopVector source_dpi_;
-
-  // The current dimensions of the frame consumer view.
-  webrtc::DesktopSize view_size_;
-  webrtc::DesktopRect clip_area_;
-
-  // The drawing buffers supplied by the frame consumer.
-  std::list<webrtc::DesktopFrame*> buffers_;
-
-  // Flag used to coalesce runs of SchedulePaint()s into a single DoPaint().
-  bool paint_scheduled_;
-
-  ChromotingStats stats_;
-
-  // Keep track of the most recent sequence number bounced back from the host.
-  int64 latest_sequence_number_;
-};
-
-}  // namespace remoting
-
-#endif  // REMOTING_CLIENT_RECTANGLE_UPDATE_DECODER_H_