video_decoder_vpx.h revision 8bcbed890bc3ce4d7a057a8f32cab53fa534672e 
1// Copyright 2013 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#ifndef REMOTING_CODEC_VIDEO_DECODER_VPX_H_
6#define REMOTING_CODEC_VIDEO_DECODER_VPX_H_
7
8#include "base/compiler_specific.h"
9#include "base/memory/scoped_ptr.h"
10#include "remoting/codec/scoped_vpx_codec.h"
11#include "remoting/codec/video_decoder.h"
12#include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
13#include "third_party/webrtc/modules/desktop_capture/desktop_region.h"
14
15typedef struct vpx_image vpx_image_t;
16
17namespace remoting {
18
19class VideoDecoderVpx : public VideoDecoder {
20 public:
21  // Create decoders for the specified protocol.
22  static scoped_ptr<VideoDecoderVpx> CreateForVP8();
23  static scoped_ptr<VideoDecoderVpx> CreateForVP9();
24
25  virtual ~VideoDecoderVpx();
26
27  // VideoDecoder interface.
28  virtual void Initialize(const webrtc::DesktopSize& screen_size) OVERRIDE;
29  virtual bool DecodePacket(const VideoPacket& packet) OVERRIDE;
30  virtual void Invalidate(const webrtc::DesktopSize& view_size,
31                          const webrtc::DesktopRegion& region) OVERRIDE;
32  virtual void RenderFrame(const webrtc::DesktopSize& view_size,
33                           const webrtc::DesktopRect& clip_area,
34                           uint8* image_buffer,
35                           int image_stride,
36                           webrtc::DesktopRegion* output_region) OVERRIDE;
37  virtual const webrtc::DesktopRegion* GetImageShape() OVERRIDE;
38
39 private:
40  explicit VideoDecoderVpx(ScopedVpxCodec codec);
41
42  // Calculates the difference between the desktop shape regions in two
43  // consecutive frames and updates |updated_region_| and |transparent_region_|
44  // accordingly.
45  void UpdateImageShapeRegion(webrtc::DesktopRegion* new_desktop_shape);
46
47  ScopedVpxCodec codec_;
48
49  // Pointer to the last decoded image.
50  vpx_image_t* last_image_;
51
52  // The region updated that hasn't been copied to the screen yet.
53  webrtc::DesktopRegion updated_region_;
54
55  // Output dimensions.
56  webrtc::DesktopSize screen_size_;
57
58  // The region occupied by the top level windows.
59  webrtc::DesktopRegion desktop_shape_;
60
61  // The region that should be make transparent.
62  webrtc::DesktopRegion transparent_region_;
63
64  DISALLOW_COPY_AND_ASSIGN(VideoDecoderVpx);
65};
66
67}  // namespace remoting
68
69#endif  // REMOTING_CODEC_VIDEO_DECODER_VP8_H_
70