Blame view

3rdparty/opencv-4.5.4/modules/imgcodecs/src/bitstrm.hpp 5.62 KB
f4334277   Hu Chunming   提交3rdparty
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
  /*M///////////////////////////////////////////////////////////////////////////////////////
  //
  //  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
  //
  //  By downloading, copying, installing or using the software you agree to this license.
  //  If you do not agree to this license, do not download, install,
  //  copy or use the software.
  //
  //
  //                           License Agreement
  //                For Open Source Computer Vision Library
  //
  // Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
  // Copyright (C) 2009, Willow Garage Inc., all rights reserved.
  // Third party copyrights are property of their respective owners.
  //
  // Redistribution and use in source and binary forms, with or without modification,
  // are permitted provided that the following conditions are met:
  //
  //   * Redistribution's of source code must retain the above copyright notice,
  //     this list of conditions and the following disclaimer.
  //
  //   * Redistribution's in binary form must reproduce the above copyright notice,
  //     this list of conditions and the following disclaimer in the documentation
  //     and/or other materials provided with the distribution.
  //
  //   * The name of the copyright holders may not be used to endorse or promote products
  //     derived from this software without specific prior written permission.
  //
  // This software is provided by the copyright holders and contributors "as is" and
  // any express or implied warranties, including, but not limited to, the implied
  // warranties of merchantability and fitness for a particular purpose are disclaimed.
  // In no event shall the Intel Corporation or contributors be liable for any direct,
  // indirect, incidental, special, exemplary, or consequential damages
  // (including, but not limited to, procurement of substitute goods or services;
  // loss of use, data, or profits; or business interruption) however caused
  // and on any theory of liability, whether in contract, strict liability,
  // or tort (including negligence or otherwise) arising in any way out of
  // the use of this software, even if advised of the possibility of such damage.
  //
  //M*/
  
  #ifndef _BITSTRM_H_
  #define _BITSTRM_H_
  
  #include <stdio.h>
  
  namespace cv
  {
  
  #define DECLARE_RBS_EXCEPTION(name) \
  class RBS_ ## name ## _Exception : public cv::Exception \
  { \
  public: \
      RBS_ ## name ## _Exception(int code_, const String& err_, const String& func_, const String& file_, int line_) : \
          cv::Exception(code_, err_, func_, file_, line_) \
      {} \
  };
  DECLARE_RBS_EXCEPTION(THROW_EOS)
  #define RBS_THROW_EOS RBS_THROW_EOS_Exception(cv::Error::StsError, "Unexpected end of input stream", CV_Func, __FILE__, __LINE__)
  DECLARE_RBS_EXCEPTION(THROW_FORB)
  #define RBS_THROW_FORB RBS_THROW_FORB_Exception(cv::Error::StsError, "Forrbidden huffman code", CV_Func, __FILE__, __LINE__)
  DECLARE_RBS_EXCEPTION(BAD_HEADER)
  #define RBS_BAD_HEADER RBS_BAD_HEADER_Exception(cv::Error::StsError, "Invalid header", CV_Func, __FILE__, __LINE__)
  
  typedef unsigned long ulong;
  
  // class RBaseStream - base class for other reading streams.
  class RBaseStream
  {
  public:
      //methods
      RBaseStream();
      virtual ~RBaseStream();
  
      virtual bool  open( const String& filename );
      virtual bool  open( const Mat& buf );
      virtual void  close();
      bool          isOpened();
      void          setPos( int pos );
      int           getPos();
      void          skip( int bytes );
  
  protected:
  
      bool    m_allocated;
      uchar*  m_start;
      uchar*  m_end;
      uchar*  m_current;
      FILE*   m_file;
      int     m_block_size;
      int     m_block_pos;
      bool    m_is_opened;
  
      virtual void  readBlock();
      virtual void  release();
      virtual void  allocate();
  };
  
  
  // class RLByteStream - uchar-oriented stream.
  // l in prefix means that the least significant uchar of a multi-uchar value goes first
  class RLByteStream : public RBaseStream
  {
  public:
      virtual ~RLByteStream();
  
      int     getByte();
      int     getBytes( void* buffer, int count );
      int     getWord();
      int     getDWord();
  };
  
  // class RMBitStream - uchar-oriented stream.
  // m in prefix means that the most significant uchar of a multi-uchar value go first
  class RMByteStream : public RLByteStream
  {
  public:
      virtual ~RMByteStream();
  
      int     getWord();
      int     getDWord();
  };
  
  // WBaseStream - base class for output streams
  class WBaseStream
  {
  public:
      //methods
      WBaseStream();
      virtual ~WBaseStream();
  
      virtual bool  open( const String& filename );
      virtual bool  open( std::vector<uchar>& buf );
      virtual void  close();
      bool          isOpened();
      int           getPos();
  
  protected:
  
      uchar*  m_start;
      uchar*  m_end;
      uchar*  m_current;
      int     m_block_size;
      int     m_block_pos;
      FILE*   m_file;
      bool    m_is_opened;
      std::vector<uchar>* m_buf;
  
      virtual void  writeBlock();
      virtual void  release();
      virtual void  allocate();
  };
  
  
  // class WLByteStream - uchar-oriented stream.
  // l in prefix means that the least significant uchar of a multi-byte value goes first
  class WLByteStream : public WBaseStream
  {
  public:
      virtual ~WLByteStream();
  
      void  putByte( int val );
      void  putBytes( const void* buffer, int count );
      void  putWord( int val );
      void  putDWord( int val );
  };
  
  
  // class WLByteStream - uchar-oriented stream.
  // m in prefix means that the least significant uchar of a multi-byte value goes last
  class WMByteStream : public WLByteStream
  {
  public:
      virtual ~WMByteStream();
      void  putWord( int val );
      void  putDWord( int val );
  };
  
  inline unsigned BSWAP(unsigned v)
  {
      return (v<<24)|((v&0xff00)<<8)|((v>>8)&0xff00)|((unsigned)v>>24);
  }
  
  bool bsIsBigEndian( void );
  
  }
  
  #endif/*_BITSTRM_H_*/