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// Copyright (c) 2010 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_BASE_DECODER_ROW_BASED_H_
#define REMOTING_BASE_DECODER_ROW_BASED_H_
#include "remoting/base/decoder.h"
namespace remoting {
class Decompressor;
class DecoderRowBased : public Decoder {
public:
virtual ~DecoderRowBased();
static DecoderRowBased* CreateZlibDecoder();
static DecoderRowBased* CreateVerbatimDecoder();
// Decoder implementation.
virtual bool IsReadyForData();
virtual void Initialize(scoped_refptr<media::VideoFrame> frame);
virtual DecodeResult DecodePacket(const VideoPacket* packet);
virtual void GetUpdatedRects(UpdatedRects* rects);
virtual void Reset();
virtual VideoPacketFormat::Encoding Encoding();
// TODO(hclam): Should make this into the Decoder interface.
// TODO(ajwong): Before putting into the interface, we should decide if the
// Host should normalize the coordinate system.
void set_reverse_rows(bool reverse) { reverse_rows_ = reverse; }
private:
enum State {
kUninitialized,
kReady,
kProcessing,
kPartitionDone,
kDone,
kError,
};
DecoderRowBased(Decompressor* decompressor,
VideoPacketFormat::Encoding encoding);
// 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.
gfx::Rect clip_;
// The video frame to write to.
scoped_refptr<media::VideoFrame> frame_;
// The compression for the input byte stream.
scoped_ptr<Decompressor> decompressor_;
// The encoding of the incoming stream.
VideoPacketFormat::Encoding encoding_;
// 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_;
// True if we should decode the image upside down.
bool reverse_rows_;
UpdatedRects updated_rects_;
DISALLOW_COPY_AND_ASSIGN(DecoderRowBased);
};
} // namespace remoting
#endif // REMOTING_BASE_DECODER_ROW_BASED_H_
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