Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/openjpeg/src/lib/openjp2/mqc.h @ 17:dd9cdb856310

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Remove PKG-INFO from the because it is regenerated automatically for the sdist
author Franz Glasner <fzglas.hg@dom66.de>
date Thu, 18 Sep 2025 17:40:40 +0200
parents b50eed0cc0ef
children
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1 /*
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2 * The copyright in this software is being made available under the 2-clauses
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3 * BSD License, included below. This software may be subject to other third
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4 * party and contributor rights, including patent rights, and no such rights
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5 * are granted under this license.
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6 *
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7 * Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium
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8 * Copyright (c) 2002-2014, Professor Benoit Macq
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9 * Copyright (c) 2001-2003, David Janssens
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10 * Copyright (c) 2002-2003, Yannick Verschueren
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11 * Copyright (c) 2003-2007, Francois-Olivier Devaux
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12 * Copyright (c) 2003-2014, Antonin Descampe
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13 * Copyright (c) 2005, Herve Drolon, FreeImage Team
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14 * Copyright (c) 2008, Jerome Fimes, Communications & Systemes <jerome.fimes@c-s.fr>
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15 * All rights reserved.
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16 *
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17 * Redistribution and use in source and binary forms, with or without
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18 * modification, are permitted provided that the following conditions
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19 * are met:
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20 * 1. Redistributions of source code must retain the above copyright
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21 * notice, this list of conditions and the following disclaimer.
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22 * 2. Redistributions in binary form must reproduce the above copyright
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23 * notice, this list of conditions and the following disclaimer in the
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24 * documentation and/or other materials provided with the distribution.
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25 *
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26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
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27 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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29 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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30 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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36 * POSSIBILITY OF SUCH DAMAGE.
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37 */
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38
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39 #ifndef OPJ_MQC_H
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40 #define OPJ_MQC_H
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41
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42 #include "opj_common.h"
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44 /**
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45 @file mqc.h
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46 @brief Implementation of an MQ-Coder (MQC)
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47
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48 The functions in MQC.C have for goal to realize the MQ-coder operations. The functions
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49 in MQC.C are used by some function in T1.C.
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50 */
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52 /** @defgroup MQC MQC - Implementation of an MQ-Coder */
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53 /*@{*/
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54
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55 /**
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56 This struct defines the state of a context.
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57 */
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58 typedef struct opj_mqc_state {
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59 /** the probability of the Least Probable Symbol (0.75->0x8000, 1.5->0xffff) */
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60 OPJ_UINT32 qeval;
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61 /** the Most Probable Symbol (0 or 1) */
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62 OPJ_UINT32 mps;
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63 /** next state if the next encoded symbol is the MPS */
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64 const struct opj_mqc_state *nmps;
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65 /** next state if the next encoded symbol is the LPS */
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66 const struct opj_mqc_state *nlps;
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67 } opj_mqc_state_t;
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68
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69 #define MQC_NUMCTXS 19
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71 /**
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72 MQ coder
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73 */
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74 typedef struct opj_mqc {
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75 /** temporary buffer where bits are coded or decoded */
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76 OPJ_UINT32 c;
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77 /** only used by MQ decoder */
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78 OPJ_UINT32 a;
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79 /** number of bits already read or free to write */
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80 OPJ_UINT32 ct;
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81 /* only used by decoder, to count the number of times a terminating 0xFF >0x8F marker is read */
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82 OPJ_UINT32 end_of_byte_stream_counter;
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83 /** pointer to the current position in the buffer */
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84 OPJ_BYTE *bp;
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85 /** pointer to the start of the buffer */
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86 OPJ_BYTE *start;
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87 /** pointer to the end of the buffer */
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88 OPJ_BYTE *end;
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89 /** Array of contexts */
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90 const opj_mqc_state_t *ctxs[MQC_NUMCTXS];
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91 /** Active context */
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92 const opj_mqc_state_t **curctx;
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93 /* lut_ctxno_zc shifted by (1 << 9) * bandno */
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94 const OPJ_BYTE* lut_ctxno_zc_orient;
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95 /** Original value of the 2 bytes at end[0] and end[1] */
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96 OPJ_BYTE backup[OPJ_COMMON_CBLK_DATA_EXTRA];
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97 } opj_mqc_t;
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98
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99 #define BYPASS_CT_INIT 0xDEADBEEF
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100
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101 #include "mqc_inl.h"
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102
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103 /** @name Exported functions */
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104 /*@{*/
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105 /* ----------------------------------------------------------------------- */
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106
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107 /**
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108 Return the number of bytes written/read since initialisation
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109 @param mqc MQC handle
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110 @return Returns the number of bytes already encoded
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111 */
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112 OPJ_UINT32 opj_mqc_numbytes(opj_mqc_t *mqc);
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113 /**
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114 Reset the states of all the context of the coder/decoder
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115 (each context is set to a state where 0 and 1 are more or less equiprobable)
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116 @param mqc MQC handle
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117 */
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118 void opj_mqc_resetstates(opj_mqc_t *mqc);
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119 /**
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120 Set the state of a particular context
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121 @param mqc MQC handle
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122 @param ctxno Number that identifies the context
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123 @param msb The MSB of the new state of the context
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124 @param prob Number that identifies the probability of the symbols for the new state of the context
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125 */
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126 void opj_mqc_setstate(opj_mqc_t *mqc, OPJ_UINT32 ctxno, OPJ_UINT32 msb,
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127 OPJ_INT32 prob);
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128 /**
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129 Initialize the encoder
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130 @param mqc MQC handle
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131 @param bp Pointer to the start of the buffer where the bytes will be written
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132 */
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133 void opj_mqc_init_enc(opj_mqc_t *mqc, OPJ_BYTE *bp);
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134 /**
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135 Set the current context used for coding/decoding
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136 @param mqc MQC handle
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137 @param ctxno Number that identifies the context
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138 */
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139 #define opj_mqc_setcurctx(mqc, ctxno) (mqc)->curctx = &(mqc)->ctxs[(OPJ_UINT32)(ctxno)]
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140
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141 /**
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142 Flush the encoder, so that all remaining data is written
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143 @param mqc MQC handle
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144 */
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145 void opj_mqc_flush(opj_mqc_t *mqc);
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146 /**
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147 BYPASS mode switch, initialization operation.
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148 JPEG 2000 p 505.
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149 @param mqc MQC handle
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150 */
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151 void opj_mqc_bypass_init_enc(opj_mqc_t *mqc);
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152
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153 /** Return number of extra bytes to add to opj_mqc_numbytes() for the²
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154 size of a non-terminating BYPASS pass
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155 @param mqc MQC handle
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156 @param erterm 1 if ERTERM is enabled, 0 otherwise
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157 */
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158 OPJ_UINT32 opj_mqc_bypass_get_extra_bytes(opj_mqc_t *mqc, OPJ_BOOL erterm);
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159
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160 /**
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161 BYPASS mode switch, coding operation.
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162 JPEG 2000 p 505.
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163 @param mqc MQC handle
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164 @param d The symbol to be encoded (0 or 1)
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165 */
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166 void opj_mqc_bypass_enc(opj_mqc_t *mqc, OPJ_UINT32 d);
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167 /**
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168 BYPASS mode switch, flush operation
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169 @param mqc MQC handle
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170 @param erterm 1 if ERTERM is enabled, 0 otherwise
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171 */
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172 void opj_mqc_bypass_flush_enc(opj_mqc_t *mqc, OPJ_BOOL erterm);
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173 /**
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174 RESET mode switch
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175 @param mqc MQC handle
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176 */
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177 void opj_mqc_reset_enc(opj_mqc_t *mqc);
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178
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179 #ifdef notdef
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180 /**
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181 RESTART mode switch (TERMALL)
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182 @param mqc MQC handle
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183 @return Returns 1 (always)
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184 */
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185 OPJ_UINT32 opj_mqc_restart_enc(opj_mqc_t *mqc);
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186 #endif
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187
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188 /**
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189 RESTART mode switch (TERMALL) reinitialisation
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190 @param mqc MQC handle
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191 */
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192 void opj_mqc_restart_init_enc(opj_mqc_t *mqc);
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193 /**
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194 ERTERM mode switch (PTERM)
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195 @param mqc MQC handle
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196 */
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197 void opj_mqc_erterm_enc(opj_mqc_t *mqc);
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198 /**
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199 SEGMARK mode switch (SEGSYM)
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200 @param mqc MQC handle
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201 */
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202 void opj_mqc_segmark_enc(opj_mqc_t *mqc);
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203
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204 /**
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205 Initialize the decoder for MQ decoding.
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206
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207 opj_mqc_finish_dec() must be absolutely called after finishing the decoding
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208 passes, so as to restore the bytes temporarily overwritten.
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209
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210 @param mqc MQC handle
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211 @param bp Pointer to the start of the buffer from which the bytes will be read
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212 Note that OPJ_COMMON_CBLK_DATA_EXTRA bytes at the end of the buffer
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213 will be temporarily overwritten with an artificial 0xFF 0xFF marker.
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214 (they will be backuped in the mqc structure to be restored later)
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215 So bp must be at least len + OPJ_COMMON_CBLK_DATA_EXTRA large, and
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216 writable.
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217 @param len Length of the input buffer
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218 @param extra_writable_bytes Indicate how many bytes after len are writable.
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219 This is to indicate your consent that bp must be
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220 large enough.
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221 */
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222 void opj_mqc_init_dec(opj_mqc_t *mqc, OPJ_BYTE *bp, OPJ_UINT32 len,
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223 OPJ_UINT32 extra_writable_bytes);
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224
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225 /**
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226 Initialize the decoder for RAW decoding.
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227
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228 opj_mqc_finish_dec() must be absolutely called after finishing the decoding
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229 passes, so as to restore the bytes temporarily overwritten.
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230
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231 @param mqc MQC handle
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232 @param bp Pointer to the start of the buffer from which the bytes will be read
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233 Note that OPJ_COMMON_CBLK_DATA_EXTRA bytes at the end of the buffer
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234 will be temporarily overwritten with an artificial 0xFF 0xFF marker.
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235 (they will be backuped in the mqc structure to be restored later)
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236 So bp must be at least len + OPJ_COMMON_CBLK_DATA_EXTRA large, and
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237 writable.
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238 @param len Length of the input buffer
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239 @param extra_writable_bytes Indicate how many bytes after len are writable.
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240 This is to indicate your consent that bp must be
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241 large enough.
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242 */
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243 void opj_mqc_raw_init_dec(opj_mqc_t *mqc, OPJ_BYTE *bp, OPJ_UINT32 len,
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244 OPJ_UINT32 extra_writable_bytes);
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245
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246
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247 /**
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248 Terminate RAW/MQC decoding
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249
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250 This restores the bytes temporarily overwritten by opj_mqc_init_dec()/
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251 opj_mqc_raw_init_dec()
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252
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253 @param mqc MQC handle
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254 */
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255 void opq_mqc_finish_dec(opj_mqc_t *mqc);
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256
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257 /**
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258 Decode a symbol
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259 @param mqc MQC handle
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260 @return Returns the decoded symbol (0 or 1)
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261 */
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262 /*static INLINE OPJ_UINT32 opj_mqc_decode(opj_mqc_t * const mqc);*/
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263 /* ----------------------------------------------------------------------- */
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264 /*@}*/
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265
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266 /*@}*/
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267
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268 #endif /* OPJ_MQC_H */