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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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