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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // CompoundBuffer implements a data buffer that is composed of several pieces, | 5 // CompoundBuffer implements a data buffer that is composed of several pieces, |
6 // each stored in a refcounted IOBuffer. It is needed for encoding/decoding | 6 // each stored in a refcounted IOBuffer. It is needed for encoding/decoding |
7 // video pipeline to represent data packet and minimize data copying. | 7 // video pipeline to represent data packet and minimize data copying. |
8 // It is particularly useful for splitting data between multiple RTP packets | 8 // It is particularly useful for splitting data between multiple RTP packets |
9 // and assembling them into one buffer on the receiving side. | 9 // and assembling them into one buffer on the receiving side. |
10 // | 10 // |
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101 class CompoundBufferInputStream | 101 class CompoundBufferInputStream |
102 : public google::protobuf::io::ZeroCopyInputStream { | 102 : public google::protobuf::io::ZeroCopyInputStream { |
103 public: | 103 public: |
104 // Caller keeps ownership of |buffer|. |buffer| must be locked. | 104 // Caller keeps ownership of |buffer|. |buffer| must be locked. |
105 explicit CompoundBufferInputStream(const CompoundBuffer* buffer); | 105 explicit CompoundBufferInputStream(const CompoundBuffer* buffer); |
106 virtual ~CompoundBufferInputStream(); | 106 virtual ~CompoundBufferInputStream(); |
107 | 107 |
108 int position() const { return position_; } | 108 int position() const { return position_; } |
109 | 109 |
110 // google::protobuf::io::ZeroCopyInputStream interface. | 110 // google::protobuf::io::ZeroCopyInputStream interface. |
111 virtual bool Next(const void** data, int* size) OVERRIDE; | 111 virtual bool Next(const void** data, int* size) override; |
112 virtual void BackUp(int count) OVERRIDE; | 112 virtual void BackUp(int count) override; |
113 virtual bool Skip(int count) OVERRIDE; | 113 virtual bool Skip(int count) override; |
114 virtual int64 ByteCount() const OVERRIDE; | 114 virtual int64 ByteCount() const override; |
115 | 115 |
116 private: | 116 private: |
117 const CompoundBuffer* buffer_; | 117 const CompoundBuffer* buffer_; |
118 | 118 |
119 size_t current_chunk_; | 119 size_t current_chunk_; |
120 int current_chunk_position_; | 120 int current_chunk_position_; |
121 int position_; | 121 int position_; |
122 int last_returned_size_; | 122 int last_returned_size_; |
123 }; | 123 }; |
124 | 124 |
125 } // namespace remoting | 125 } // namespace remoting |
126 | 126 |
127 #endif // REMOTING_BASE_COMPOUND_BUFFER_H_ | 127 #endif // REMOTING_BASE_COMPOUND_BUFFER_H_ |
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