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// Copyright (c) 2011 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_ENCODER_ROW_BASED_H_
#define REMOTING_BASE_ENCODER_ROW_BASED_H_
#include "remoting/base/encoder.h"
#include "remoting/proto/video.pb.h"
#include "third_party/skia/include/core/SkRect.h"
#include "ui/gfx/size.h"
namespace remoting {
class Compressor;
class UpdateStreamPacket;
// EncoderRowBased implements an Encoder using zlib or verbatim
// compression. Zlib-based encoder must be created using
// CreateZlibEncoder(), verbatim encoder is created with
// CreateVerbatimEncoder().
//
// Compressor is reset before encoding each rectangle, so that each
// rectangle can be decoded independently.
class EncoderRowBased : public Encoder {
public:
static EncoderRowBased* CreateZlibEncoder();
static EncoderRowBased* CreateZlibEncoder(int packet_size);
static EncoderRowBased* CreateVerbatimEncoder();
static EncoderRowBased* CreateVerbatimEncoder(int packet_size);
virtual ~EncoderRowBased();
virtual void Encode(scoped_refptr<CaptureData> capture_data,
bool key_frame,
DataAvailableCallback* data_available_callback);
private:
EncoderRowBased(Compressor* compressor, VideoPacketFormat::Encoding encoding);
EncoderRowBased(Compressor* compressor, VideoPacketFormat::Encoding encoding,
int packet_size);
// Encode a single dirty rect using compressor.
void EncodeRect(const SkIRect& rect, bool last);
// Marks a packet as the first in a series of rectangle updates.
void PrepareUpdateStart(const SkIRect& rect, VideoPacket* packet);
// Retrieves a pointer to the output buffer in |update| used for storing the
// encoded rectangle data. Will resize the buffer to |size|.
uint8* GetOutputBuffer(VideoPacket* packet, size_t size);
// Submit |message| to |callback_|.
void SubmitMessage(VideoPacket* packet, size_t rect_index);
// The encoding of the incoming stream.
VideoPacketFormat::Encoding encoding_;
scoped_ptr<Compressor> compressor_;
scoped_refptr<CaptureData> capture_data_;
scoped_ptr<DataAvailableCallback> callback_;
// The most recent screen size.
gfx::Size screen_size_;
int packet_size_;
};
} // namespace remoting
#endif // REMOTING_BASE_ENCODER_ROW_BASED_H_
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