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  1. /*
  2.  * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
  3.  * Copyright (c) 2002-2007, Professor Benoit Macq
  4.  * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
  5.  * Copyright (c) 2005, Herve Drolon, FreeImage Team
  6.  * All rights reserved.
  7.  *
  8.  * Redistribution and use in source and binary forms, with or without
  9.  * modification, are permitted provided that the following conditions
  10.  * are met:
  11.  * 1. Redistributions of source code must retain the above copyright
  12.  *    notice, this list of conditions and the following disclaimer.
  13.  * 2. Redistributions in binary form must reproduce the above copyright
  14.  *    notice, this list of conditions and the following disclaimer in the
  15.  *    documentation and/or other materials provided with the distribution.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
  18.  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19.  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20.  * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  21.  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  22.  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  23.  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24.  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  25.  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  26.  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  27.  * POSSIBILITY OF SUCH DAMAGE.
  28.  */
  29.  
  30. #ifndef __RAW_H
  31. #define __RAW_H
  32. /**
  33. @file raw.h
  34. @brief Implementation of operations for raw encoding (RAW)
  35.  
  36. The functions in RAW.C have for goal to realize the operation of raw encoding linked
  37. with the corresponding mode switch.
  38. */
  39.  
  40. /** @defgroup RAW RAW - Implementation of operations for raw encoding */
  41. /*@{*/
  42.  
  43. /**
  44. RAW encoding operations
  45. */
  46. typedef struct opj_raw {
  47.         /** temporary buffer where bits are coded or decoded */
  48.         unsigned char c;
  49.         /** number of bits already read or free to write */
  50.         unsigned int ct;
  51.         /** maximum length to decode */
  52.         unsigned int lenmax;
  53.         /** length decoded */
  54.         unsigned int len;
  55.         /** pointer to the current position in the buffer */
  56.         unsigned char *bp;
  57.         /** pointer to the start of the buffer */
  58.         unsigned char *start;
  59.         /** pointer to the end of the buffer */
  60.         unsigned char *end;
  61. } opj_raw_t;
  62.  
  63. /** @name Exported functions */
  64. /*@{*/
  65. /* ----------------------------------------------------------------------- */
  66. /**
  67. Create a new RAW handle
  68. @return Returns a new RAW handle if successful, returns NULL otherwise
  69. */
  70. opj_raw_t* raw_create(void);
  71. /**
  72. Destroy a previously created RAW handle
  73. @param raw RAW handle to destroy
  74. */
  75. void raw_destroy(opj_raw_t *raw);
  76. /**
  77. Return the number of bytes written/read since initialisation
  78. @param raw RAW handle to destroy
  79. @return Returns the number of bytes already encoded
  80. */
  81. int raw_numbytes(opj_raw_t *raw);
  82. /**
  83. Initialize the decoder
  84. @param raw RAW handle
  85. @param bp Pointer to the start of the buffer from which the bytes will be read
  86. @param len Length of the input buffer
  87. */
  88. void raw_init_dec(opj_raw_t *raw, unsigned char *bp, int len);
  89. /**
  90. Decode a symbol using raw-decoder. Cfr p.506 TAUBMAN
  91. @param raw RAW handle
  92. @return Returns the decoded symbol (0 or 1)
  93. */
  94. int raw_decode(opj_raw_t *raw);
  95. /* ----------------------------------------------------------------------- */
  96. /*@}*/
  97.  
  98. /*@}*/
  99.  
  100. #endif /* __RAW_H */
  101.