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// 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_CODEC_VIDEO_DECODER_VERBATIM_H_
#define REMOTING_CODEC_VIDEO_DECODER_VERBATIM_H_
#include "base/compiler_specific.h"
#include "base/memory/scoped_ptr.h"
#include "remoting/codec/video_decoder.h"
namespace remoting {
// Video decoder implementations that decodes video packet encoded by
// VideoEncoderVerbatim. It just copies data from incoming packets to the
// video frames.
class VideoDecoderVerbatim : public VideoDecoder {
public:
virtual ~VideoDecoderVerbatim();
VideoDecoderVerbatim();
// VideoDecoder implementation.
virtual bool IsReadyForData() OVERRIDE;
virtual void Initialize(const SkISize& screen_size) OVERRIDE;
virtual DecodeResult DecodePacket(const VideoPacket* packet) OVERRIDE;
virtual VideoPacketFormat::Encoding Encoding() OVERRIDE;
virtual void Invalidate(const SkISize& view_size,
const SkRegion& region) OVERRIDE;
virtual void RenderFrame(const SkISize& view_size,
const SkIRect& clip_area,
uint8* image_buffer,
int image_stride,
SkRegion* output_region) OVERRIDE;
virtual const SkRegion* GetImageShape() OVERRIDE;
private:
enum State {
kUninitialized,
kReady,
kProcessing,
kPartitionDone,
kDone,
kError,
};
// Helper method. Called from DecodePacket to updated state of the decoder.
void UpdateStateForPacket(const VideoPacket* packet);
// The internal state of the decoder.
State state_;
// Keeps track of the updating rect.
SkIRect clip_;
// The position in the row that we are updating.
int row_pos_;
// The current row in the rect that we are updaing.
int row_y_;
// The region updated that hasn't been copied to the screen yet.
SkRegion updated_region_;
// Size of the remote screen.
SkISize screen_size_;
// The bitmap holding the remote screen bits.
scoped_ptr<uint8[]> screen_buffer_;
DISALLOW_COPY_AND_ASSIGN(VideoDecoderVerbatim);
};
} // namespace remoting
#endif // REMOTING_CODEC_VIDEO_DECODER_VERBATIM_H_
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