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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef REMOTING_BASE_ENCODER_ROW_BASED_H_ | |
| 6 #define REMOTING_BASE_ENCODER_ROW_BASED_H_ | |
| 7 | |
| 8 #include "remoting/base/encoder.h" | |
| 9 #include "remoting/proto/video.pb.h" | |
| 10 #include "third_party/skia/include/core/SkRect.h" | |
| 11 | |
| 12 namespace remoting { | |
| 13 | |
| 14 class Compressor; | |
| 15 | |
| 16 // EncoderRowBased implements an Encoder using zlib or verbatim | |
| 17 // compression. Zlib-based encoder must be created using | |
| 18 // CreateZlibEncoder(), verbatim encoder is created with | |
| 19 // CreateVerbatimEncoder(). | |
| 20 // | |
| 21 // Compressor is reset before encoding each rectangle, so that each | |
| 22 // rectangle can be decoded independently. | |
| 23 class EncoderRowBased : public Encoder { | |
| 24 public: | |
| 25 static EncoderRowBased* CreateZlibEncoder(); | |
| 26 static EncoderRowBased* CreateZlibEncoder(int packet_size); | |
| 27 static EncoderRowBased* CreateVerbatimEncoder(); | |
| 28 static EncoderRowBased* CreateVerbatimEncoder(int packet_size); | |
| 29 | |
| 30 virtual ~EncoderRowBased(); | |
| 31 | |
| 32 virtual void Encode( | |
| 33 scoped_refptr<CaptureData> capture_data, | |
| 34 bool key_frame, | |
| 35 const DataAvailableCallback& data_available_callback) OVERRIDE; | |
| 36 | |
| 37 private: | |
| 38 EncoderRowBased(Compressor* compressor, VideoPacketFormat::Encoding encoding); | |
| 39 EncoderRowBased(Compressor* compressor, VideoPacketFormat::Encoding encoding, | |
| 40 int packet_size); | |
| 41 | |
| 42 // Encode a single dirty rect using compressor. | |
| 43 void EncodeRect(const SkIRect& rect, bool last); | |
| 44 | |
| 45 // Marks a packet as the first in a series of rectangle updates. | |
| 46 void PrepareUpdateStart(const SkIRect& rect, VideoPacket* packet); | |
| 47 | |
| 48 // Retrieves a pointer to the output buffer in |update| used for storing the | |
| 49 // encoded rectangle data. Will resize the buffer to |size|. | |
| 50 uint8* GetOutputBuffer(VideoPacket* packet, size_t size); | |
| 51 | |
| 52 // Submit |message| to |callback_|. | |
| 53 void SubmitMessage(VideoPacket* packet, size_t rect_index); | |
| 54 | |
| 55 // The encoding of the incoming stream. | |
| 56 VideoPacketFormat::Encoding encoding_; | |
| 57 | |
| 58 scoped_ptr<Compressor> compressor_; | |
| 59 | |
| 60 scoped_refptr<CaptureData> capture_data_; | |
| 61 DataAvailableCallback callback_; | |
| 62 | |
| 63 // The most recent screen size. | |
| 64 SkISize screen_size_; | |
| 65 | |
| 66 int packet_size_; | |
| 67 }; | |
| 68 | |
| 69 } // namespace remoting | |
| 70 | |
| 71 #endif // REMOTING_BASE_ENCODER_ROW_BASED_H_ | |
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