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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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