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// Copyright 2013 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_DECODER_VPX_H_
#define REMOTING_CODEC_VIDEO_DECODER_VPX_H_
#include "base/compiler_specific.h"
#include "base/memory/scoped_ptr.h"
#include "remoting/codec/scoped_vpx_codec.h"
#include "remoting/codec/video_decoder.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_region.h"
typedef struct vpx_image vpx_image_t;
namespace remoting {
class VideoDecoderVpx : public VideoDecoder {
public:
// Create decoders for the specified protocol.
static scoped_ptr<VideoDecoderVpx> CreateForVP8();
static scoped_ptr<VideoDecoderVpx> CreateForVP9();
~VideoDecoderVpx() override;
// VideoDecoder interface.
void Initialize(const webrtc::DesktopSize& screen_size) override;
bool DecodePacket(const VideoPacket& packet) override;
void Invalidate(const webrtc::DesktopSize& view_size,
const webrtc::DesktopRegion& region) override;
void RenderFrame(const webrtc::DesktopSize& view_size,
const webrtc::DesktopRect& clip_area,
uint8* image_buffer,
int image_stride,
webrtc::DesktopRegion* output_region) override;
const webrtc::DesktopRegion* GetImageShape() override;
private:
explicit VideoDecoderVpx(ScopedVpxCodec codec);
// Calculates the difference between the desktop shape regions in two
// consecutive frames and updates |updated_region_| and |transparent_region_|
// accordingly.
void UpdateImageShapeRegion(webrtc::DesktopRegion* new_desktop_shape);
ScopedVpxCodec codec_;
// Pointer to the last decoded image.
vpx_image_t* last_image_;
// The region updated that hasn't been copied to the screen yet.
webrtc::DesktopRegion updated_region_;
// Output dimensions.
webrtc::DesktopSize screen_size_;
// The region occupied by the top level windows.
webrtc::DesktopRegion desktop_shape_;
// The region that should be make transparent.
webrtc::DesktopRegion transparent_region_;
DISALLOW_COPY_AND_ASSIGN(VideoDecoderVpx);
};
} // namespace remoting
#endif // REMOTING_CODEC_VIDEO_DECODER_VP8_H_
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