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1 // Copyright (c) 2012 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_DECODER_ROW_BASED_H_ | |
6 #define REMOTING_BASE_DECODER_ROW_BASED_H_ | |
7 | |
8 #include "base/compiler_specific.h" | |
9 #include "base/memory/scoped_ptr.h" | |
10 #include "remoting/base/decoder.h" | |
11 | |
12 namespace remoting { | |
13 | |
14 class Decompressor; | |
15 | |
16 class DecoderRowBased : public Decoder { | |
17 public: | |
18 virtual ~DecoderRowBased(); | |
19 | |
20 static DecoderRowBased* CreateZlibDecoder(); | |
21 static DecoderRowBased* CreateVerbatimDecoder(); | |
22 | |
23 // Decoder implementation. | |
24 virtual bool IsReadyForData() OVERRIDE; | |
25 virtual void Initialize(const SkISize& screen_size) OVERRIDE; | |
26 virtual DecodeResult DecodePacket(const VideoPacket* packet) OVERRIDE; | |
27 virtual VideoPacketFormat::Encoding Encoding() OVERRIDE; | |
28 virtual void Invalidate(const SkISize& view_size, | |
29 const SkRegion& region) OVERRIDE; | |
30 virtual void RenderFrame(const SkISize& view_size, | |
31 const SkIRect& clip_area, | |
32 uint8* image_buffer, | |
33 int image_stride, | |
34 SkRegion* output_region) OVERRIDE; | |
35 | |
36 private: | |
37 enum State { | |
38 kUninitialized, | |
39 kReady, | |
40 kProcessing, | |
41 kPartitionDone, | |
42 kDone, | |
43 kError, | |
44 }; | |
45 | |
46 DecoderRowBased(Decompressor* decompressor, | |
47 VideoPacketFormat::Encoding encoding); | |
48 | |
49 // Helper method. Called from DecodePacket to updated state of the decoder. | |
50 void UpdateStateForPacket(const VideoPacket* packet); | |
51 | |
52 // The internal state of the decoder. | |
53 State state_; | |
54 | |
55 // Keeps track of the updating rect. | |
56 SkIRect clip_; | |
57 | |
58 // The compression for the input byte stream. | |
59 scoped_ptr<Decompressor> decompressor_; | |
60 | |
61 // The encoding of the incoming stream. | |
62 VideoPacketFormat::Encoding encoding_; | |
63 | |
64 // The position in the row that we are updating. | |
65 int row_pos_; | |
66 | |
67 // The current row in the rect that we are updaing. | |
68 int row_y_; | |
69 | |
70 // The region updated that hasn't been copied to the screen yet. | |
71 SkRegion updated_region_; | |
72 | |
73 // Size of the remote screen. | |
74 SkISize screen_size_; | |
75 | |
76 // The bitmap holding the remote screen bits. | |
77 scoped_array<uint8> screen_buffer_; | |
78 | |
79 DISALLOW_COPY_AND_ASSIGN(DecoderRowBased); | |
80 }; | |
81 | |
82 } // namespace remoting | |
83 | |
84 #endif // REMOTING_BASE_DECODER_ROW_BASED_H_ | |
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