remoting/codec/video_decoder_vpx.h

   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
  15 typedef const struct vpx_codec_iface vpx_codec_iface_t;
  16 typedef struct vpx_image vpx_image_t;
  17
  18 namespace remoting {
  19
  20 class VideoDecoderVpx : public VideoDecoder {
  21  public:
  22   // Create decoders for the specified protocol.
  23   static scoped_ptr<VideoDecoderVpx> CreateForVP8();
  24   static scoped_ptr<VideoDecoderVpx> CreateForVP9();
  25
  26   ~VideoDecoderVpx() override;
  27
  28   // VideoDecoder interface.
  29   void Initialize(const webrtc::DesktopSize& source_size) override;
  30   bool DecodePacket(const VideoPacket& packet) override;
  31   void Invalidate(const webrtc::DesktopSize& view_size,
  32                   const webrtc::DesktopRegion& region) override;
  33   void RenderFrame(const webrtc::DesktopSize& view_size,
  34                    const webrtc::DesktopRect& clip_area,
  35                    uint8* image_buffer,
  36                    int image_stride,
  37                    webrtc::DesktopRegion* output_region) override;
  38   const webrtc::DesktopRegion* GetImageShape() override;
  39
  40  private:
  41   explicit VideoDecoderVpx(vpx_codec_iface_t* codec);
  42
  43   // Returns the dimensions of the most recent frame as a DesktopSize.
  44   webrtc::DesktopSize image_size() const;
  45
  46   ScopedVpxCodec codec_;
  47
  48   // Pointer to the most recently decoded image.
  49   vpx_image_t* image_;
  50
  51   // Area of the source that has changed since the last RenderFrame call.
  52   webrtc::DesktopRegion updated_region_;
  53
  54   // The shape of the most-recent frame, if any.
  55   scoped_ptr<webrtc::DesktopRegion> desktop_shape_;
  56
  57   DISALLOW_COPY_AND_ASSIGN(VideoDecoderVpx);
  58 };
  59
  60 }  // namespace remoting
  61
  62 #endif  // REMOTING_CODEC_VIDEO_DECODER_VP8_H_