1// Copyright (c) 2012 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// FrameConsumerProxy is used to allow a FrameConsumer on the UI thread to be
6// invoked by a Decoder on the decoder thread.  The Detach() method is used by
7// the proxy's owner before tearing down the FrameConsumer, to prevent any
8// further invokations reaching it.
9
10#ifndef REMOTING_CLIENT_FRAME_CONSUMER_PROXY_H_
11#define REMOTING_CLIENT_FRAME_CONSUMER_PROXY_H_
12
13#include "base/memory/ref_counted.h"
14#include "base/memory/weak_ptr.h"
15#include "remoting/client/frame_consumer.h"
16
17namespace base {
18class SingleThreadTaskRunner;
19}  // namespace base
20
21namespace remoting {
22
23class FrameConsumerProxy
24    : public base::RefCountedThreadSafe<FrameConsumerProxy>,
25      public FrameConsumer {
26 public:
27  // Constructs a proxy for |frame_consumer| which will trampoline invocations
28  // to |frame_consumer_message_loop|.
29  FrameConsumerProxy(scoped_refptr<base::SingleThreadTaskRunner> task_runner,
30                     const base::WeakPtr<FrameConsumer>& frame_consumer);
31
32  // FrameConsumer implementation.
33  virtual void ApplyBuffer(const webrtc::DesktopSize& view_size,
34                           const webrtc::DesktopRect& clip_area,
35                           webrtc::DesktopFrame* buffer,
36                           const webrtc::DesktopRegion& region,
37                           const webrtc::DesktopRegion& shape) OVERRIDE;
38  virtual void ReturnBuffer(webrtc::DesktopFrame* buffer) OVERRIDE;
39  virtual void SetSourceSize(const webrtc::DesktopSize& source_size,
40                             const webrtc::DesktopVector& dpi) OVERRIDE;
41  virtual PixelFormat GetPixelFormat() OVERRIDE;
42
43 private:
44  friend class base::RefCountedThreadSafe<FrameConsumerProxy>;
45  virtual ~FrameConsumerProxy();
46
47  base::WeakPtr<FrameConsumer> frame_consumer_;
48  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
49
50  PixelFormat pixel_format_;
51
52  DISALLOW_COPY_AND_ASSIGN(FrameConsumerProxy);
53};
54
55}  // namespace remoting
56
57#endif  // REMOTING_CLIENT_FRAME_CONSUMER_PROXY_H_
58