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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 void Reset();
virtual bool IsReadyForData();
virtual void Initialize(scoped_refptr<media::VideoFrame> frame,
const gfx::Rect& clip, int bytes_per_src_pixel);
virtual void DecodeBytes(const std::string& encoded_bytes);
virtual UpdateStreamEncoding Encoding() { return 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:
DecoderRowBased(Decompressor* decompressor, UpdateStreamEncoding encoding);
enum State {
kUninitialized,
kReady,
kError,
};
// 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.
UpdateStreamEncoding encoding_;
// Number of bytes per pixel from source stream.
int bytes_per_src_pixel_;
// 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_;
DISALLOW_COPY_AND_ASSIGN(DecoderRowBased);
};
} // namespace remoting
#endif // REMOTING_BASE_DECODER_ROW_BASED_H_
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