2 * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
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3 * Copyright (c) 2002-2007, Professor Benoit Macq
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4 * Copyright (c) 2001-2003, David Janssens
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5 * Copyright (c) 2002-2003, Yannick Verschueren
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6 * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
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7 * Copyright (c) 2005, Herve Drolon, FreeImage Team
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8 * Copyright (c) 2006-2007, Parvatha Elangovan
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9 * Copyright (c) 2008, Jerome Fimes, Communications & Systemes <jerome.fimes@c-s.fr>
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10 * All rights reserved.
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12 * Redistribution and use in source and binary forms, with or without
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13 * modification, are permitted provided that the following conditions
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15 * 1. Redistributions of source code must retain the above copyright
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16 * notice, this list of conditions and the following disclaimer.
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17 * 2. Redistributions in binary form must reproduce the above copyright
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18 * notice, this list of conditions and the following disclaimer in the
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19 * documentation and/or other materials provided with the distribution.
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21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
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22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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31 * POSSIBILITY OF SUCH DAMAGE.
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37 @brief The JPEG-2000 Codestream Reader/Writer (J2K)
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39 The functions in J2K.C have for goal to read/write the several parts of the codestream: markers and data.
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42 #include "openjpeg.h"
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44 struct opj_dparameters;
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45 struct opj_stream_private;
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46 struct opj_event_mgr;
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47 /** @defgroup J2K J2K - JPEG-2000 codestream reader/writer */
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50 #define J2K_CP_CSTY_PRT 0x01
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51 #define J2K_CP_CSTY_SOP 0x02
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52 #define J2K_CP_CSTY_EPH 0x04
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53 #define J2K_CCP_CSTY_PRT 0x01
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54 #define J2K_CCP_CBLKSTY_LAZY 0x01
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55 #define J2K_CCP_CBLKSTY_RESET 0x02
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56 #define J2K_CCP_CBLKSTY_TERMALL 0x04
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57 #define J2K_CCP_CBLKSTY_VSC 0x08
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58 #define J2K_CCP_CBLKSTY_PTERM 0x10
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59 #define J2K_CCP_CBLKSTY_SEGSYM 0x20
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60 #define J2K_CCP_QNTSTY_NOQNT 0
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61 #define J2K_CCP_QNTSTY_SIQNT 1
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62 #define J2K_CCP_QNTSTY_SEQNT 2
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64 /* ----------------------------------------------------------------------- */
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66 #define J2K_MS_SOC 0xff4f /**< SOC marker value */
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67 #define J2K_MS_SOT 0xff90 /**< SOT marker value */
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68 #define J2K_MS_SOD 0xff93 /**< SOD marker value */
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69 #define J2K_MS_EOC 0xffd9 /**< EOC marker value */
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70 #define J2K_MS_SIZ 0xff51 /**< SIZ marker value */
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71 #define J2K_MS_COD 0xff52 /**< COD marker value */
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72 #define J2K_MS_COC 0xff53 /**< COC marker value */
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73 #define J2K_MS_RGN 0xff5e /**< RGN marker value */
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74 #define J2K_MS_QCD 0xff5c /**< QCD marker value */
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75 #define J2K_MS_QCC 0xff5d /**< QCC marker value */
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76 #define J2K_MS_POC 0xff5f /**< POC marker value */
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77 #define J2K_MS_TLM 0xff55 /**< TLM marker value */
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78 #define J2K_MS_PLM 0xff57 /**< PLM marker value */
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79 #define J2K_MS_PLT 0xff58 /**< PLT marker value */
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80 #define J2K_MS_PPM 0xff60 /**< PPM marker value */
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81 #define J2K_MS_PPT 0xff61 /**< PPT marker value */
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82 #define J2K_MS_SOP 0xff91 /**< SOP marker value */
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83 #define J2K_MS_EPH 0xff92 /**< EPH marker value */
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84 #define J2K_MS_CRG 0xff63 /**< CRG marker value */
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85 #define J2K_MS_COM 0xff64 /**< COM marker value */
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86 #define J2K_MS_CBD 0xff78 /**< CBD marker value */
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87 #define J2K_MS_MCC 0xff75 /**< MCC marker value */
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88 #define J2K_MS_MCT 0xff74 /**< MCT marker value */
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89 #define J2K_MS_MCO 0xff77 /**< MCO marker value */
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93 #define J2K_MS_EPC 0xff68 /**< EPC marker value (Part 11: JPEG 2000 for Wireless) */
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94 #define J2K_MS_EPB 0xff66 /**< EPB marker value (Part 11: JPEG 2000 for Wireless) */
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95 #define J2K_MS_ESD 0xff67 /**< ESD marker value (Part 11: JPEG 2000 for Wireless) */
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96 #define J2K_MS_RED 0xff69 /**< RED marker value (Part 11: JPEG 2000 for Wireless) */
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97 #endif /* USE_JPWL */
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99 #define J2K_MS_SEC 0xff65 /**< SEC marker value (Part 8: Secure JPEG 2000) */
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100 #define J2K_MS_INSEC 0xff94 /**< INSEC marker value (Part 8: Secure JPEG 2000) */
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101 #endif /* USE_JPSEC */
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105 /* ----------------------------------------------------------------------- */
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108 Values that specify the status of the decoding process when decoding the main header.
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109 These values may be combined with a | operator.
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113 J2K_DEC_STATE_NONE = 0x0000, /**< a SOC marker is expected */
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114 J2K_DEC_STATE_MHSOC = 0x0001, /**< a SOC marker is expected */
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115 J2K_DEC_STATE_MHSIZ = 0x0002, /**< a SIZ marker is expected */
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116 J2K_DEC_STATE_MH = 0x0004, /**< the decoding process is in the main header */
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117 J2K_DEC_STATE_TPHSOT = 0x0008, /**< the decoding process is in a tile part header and expects a SOT marker */
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118 J2K_DEC_STATE_TPH = 0x0010, /**< the decoding process is in a tile part header */
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119 J2K_DEC_STATE_MT = 0x0020, /**< the EOC marker has just been read */
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120 J2K_DEC_STATE_NEOC = 0x0040, /**< the decoding process must not expect a EOC marker because the codestream is truncated */
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121 J2K_DEC_STATE_DATA = 0x0080, /**< the decoding process must not expect a EOC marker because the codestream is truncated */
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122 J2K_DEC_STATE_ERR = 0x8000, /**< the decoding process has encountered an error */
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123 J2K_DEC_STATE_EOC = 0x0100
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125 J2K_DECODING_STATUS;
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128 Values that specify the status of the decoding process when decoding the main header.
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129 These values may be combined with a | operator.
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133 J2K_ENC_STATE_NONE = 0x0000, /**< a SOC marker is expected */
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134 J2K_ENC_STATE_ENCODE = 0x0001, /**< a SOC marker is expected */
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136 J2K_ENCODING_STATUS;
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139 * Type of data for storing the MCT data
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141 typedef enum MCT_ELEMENT_TYPE
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143 MCT_TYPE_INT16 = 0, /** MCT data is stored as signed shorts*/
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144 MCT_TYPE_INT32 = 1, /** MCT data is stored as signed integers*/
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145 MCT_TYPE_FLOAT = 2, /** MCT data is stored as floats*/
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146 MCT_TYPE_DOUBLE = 3 /** MCT data is stored as doubles*/
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147 } J2K_MCT_ELEMENT_TYPE;
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150 * Type of data for storing the MCT data
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152 typedef enum MCT_ARRAY_TYPE
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154 MCT_TYPE_DEPENDENCY = 0,
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155 MCT_TYPE_DECORRELATION = 1,
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156 MCT_TYPE_OFFSET = 2
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157 } J2K_MCT_ARRAY_TYPE;
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160 /* ----------------------------------------------------------------------- */
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165 Quantization stepsize
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167 typedef struct opj_stepsize
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176 typedef struct opj_mct_data
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178 J2K_MCT_ELEMENT_TYPE m_element_type;
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179 J2K_MCT_ARRAY_TYPE m_array_type;
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180 OPJ_UINT32 m_index;
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182 OPJ_UINT32 m_data_size;
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186 typedef struct opj_simple_mcc_decorrelation_data
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188 OPJ_UINT32 m_index;
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189 OPJ_UINT32 m_nb_comps;
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190 opj_mct_data_t * m_decorrelation_array;
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191 opj_mct_data_t * m_offset_array;
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192 OPJ_UINT32 m_is_irreversible : 1;
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194 opj_simple_mcc_decorrelation_data_t;
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198 Tile-component coding parameters
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200 typedef struct opj_tccp
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202 /** coding style */
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204 /** number of resolutions */
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205 OPJ_UINT32 numresolutions;
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206 /** code-blocks width */
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208 /** code-blocks height */
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210 /** code-block coding style */
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211 OPJ_UINT32 cblksty;
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212 /** discrete wavelet transform identifier */
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214 /** quantisation style */
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216 /** stepsizes used for quantization */
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217 opj_stepsize_t stepsizes[J2K_MAXBANDS];
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218 /** number of guard bits */
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219 OPJ_UINT32 numgbits;
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220 /** Region Of Interest shift */
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221 OPJ_INT32 roishift;
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222 /** precinct width */
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223 OPJ_UINT32 prcw[J2K_MAXRLVLS];
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224 /** precinct height */
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225 OPJ_UINT32 prch[J2K_MAXRLVLS];
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226 /** the dc_level_shift **/
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227 OPJ_INT32 m_dc_level_shift;
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232 Tile coding parameters :
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233 this structure is used to store coding/decoding parameters common to all
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234 tiles (information like COD, COC in main header)
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236 typedef struct opj_tcp
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238 /** coding style */
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240 /** progression order */
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241 OPJ_PROG_ORDER prg;
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242 /** number of layers */
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243 OPJ_UINT32 numlayers;
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244 OPJ_UINT32 num_layers_to_decode;
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245 /** multi-component transform identifier */
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247 /** rates of layers */
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248 OPJ_FLOAT32 rates[100];
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249 /** number of progression order changes */
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250 OPJ_UINT32 numpocs;
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251 /** progression order changes */
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252 opj_poc_t pocs[32];
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253 /** packet header store there for futur use in t2_decode_packet */
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254 OPJ_BYTE *ppt_data;
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255 /** used to keep a track of the allocated memory */
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256 OPJ_BYTE *ppt_buffer;
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257 /** Number of bytes stored inside ppt_data*/
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258 OPJ_UINT32 ppt_data_size;
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259 /** size of ppt_data*/
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260 OPJ_UINT32 ppt_len;
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261 /** add fixed_quality */
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262 OPJ_FLOAT32 distoratio[100];
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263 /** tile-component coding parameters */
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265 /** number of tile parts for the tile. */
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266 OPJ_UINT32 m_nb_tile_parts;
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267 /** data for the tile */
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269 /** size of data */
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270 OPJ_UINT32 m_data_size;
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271 /** encoding norms */
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272 OPJ_FLOAT64 * mct_norms;
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273 /** the mct decoding matrix */
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274 OPJ_FLOAT32 * m_mct_decoding_matrix;
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275 /** the mct coding matrix */
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276 OPJ_FLOAT32 * m_mct_coding_matrix;
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278 opj_mct_data_t * m_mct_records;
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279 /** the number of mct records. */
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280 OPJ_UINT32 m_nb_mct_records;
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281 /** the max number of mct records. */
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282 OPJ_UINT32 m_nb_max_mct_records;
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284 opj_simple_mcc_decorrelation_data_t * m_mcc_records;
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285 /** the number of mct records. */
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286 OPJ_UINT32 m_nb_mcc_records;
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287 /** the max number of mct records. */
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288 OPJ_UINT32 m_nb_max_mcc_records;
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292 /***** FLAGS *******/
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293 /** If ppt == 1 --> there was a PPT marker for the present tile */
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294 OPJ_UINT32 ppt : 1;
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295 /** indicates if a POC marker has been used O:NO, 1:YES */
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296 OPJ_UINT32 POC : 1;
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299 typedef struct opj_encoding_param
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301 /** Digital cinema profile*/
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302 OPJ_CINEMA_MODE m_cinema;
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303 /** Maximum rate for each component. If == 0, component size limitation is not considered */
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304 OPJ_UINT32 m_max_comp_size;
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305 /** Position of tile part flag in progression order*/
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306 OPJ_INT32 m_tp_pos;
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308 OPJ_INT32 *m_matrice;
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309 /** Flag determining tile part generation*/
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310 OPJ_BYTE m_tp_flag;
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311 /** allocation by rate/distortion */
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312 OPJ_UINT32 m_disto_alloc : 1;
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313 /** allocation by fixed layer */
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314 OPJ_UINT32 m_fixed_alloc : 1;
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315 /** add fixed_quality */
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316 OPJ_UINT32 m_fixed_quality : 1;
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317 /** Enabling Tile part generation*/
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318 OPJ_UINT32 m_tp_on : 1;
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320 opj_encoding_param_t;
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322 typedef struct opj_decoding_param
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324 /** if != 0, then original dimension divided by 2^(reduce); if == 0 or not used, image is decoded to the full resolution */
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325 OPJ_UINT32 m_reduce;
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326 /** if != 0, then only the first "layer" layers are decoded; if == 0 or not used, all the quality layers are decoded */
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327 OPJ_UINT32 m_layer;
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329 opj_decoding_param_t;
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334 typedef struct opj_cp
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336 /** Size of the image in bits*/
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339 OPJ_RSIZ_CAPABILITIES rsiz;
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350 /** number of tiles in width */
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352 /** number of tiles in heigth */
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354 /** packet header storage original buffer */
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355 OPJ_BYTE *ppm_buffer;
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356 /** packet header store there for futur use in t2_decode_packet */
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357 OPJ_BYTE *ppm_data;
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358 /** size of the ppm_data*/
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359 OPJ_UINT32 ppm_len;
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360 /** Number of bytes actually stored inside the ppm_data */
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361 OPJ_UINT32 ppm_data_size;
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362 /** tile coding parameters */
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366 opj_decoding_param_t m_dec;
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367 opj_encoding_param_t m_enc;
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374 /** enables writing of EPC in MH, thus activating JPWL */
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376 /** enables writing of EPB, in case of activated JPWL */
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378 /** enables writing of ESD, in case of activated JPWL */
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380 /** enables writing of informative techniques of ESD, in case of activated JPWL */
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382 /** enables writing of RED, in case of activated JPWL */
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384 /** error protection method for MH (0,1,16,32,37-128) */
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386 /** tile number of header protection specification (>=0) */
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387 int hprot_TPH_tileno[JPWL_MAX_NO_TILESPECS];
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388 /** error protection methods for TPHs (0,1,16,32,37-128) */
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389 int hprot_TPH[JPWL_MAX_NO_TILESPECS];
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390 /** tile number of packet protection specification (>=0) */
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391 int pprot_tileno[JPWL_MAX_NO_PACKSPECS];
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392 /** packet number of packet protection specification (>=0) */
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393 int pprot_packno[JPWL_MAX_NO_PACKSPECS];
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394 /** error protection methods for packets (0,1,16,32,37-128) */
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395 int pprot[JPWL_MAX_NO_PACKSPECS];
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396 /** enables writing of ESD, (0/2/4 bytes) */
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398 /** sensitivity addressing size (0=auto/2/4 bytes) */
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400 /** sensitivity range (0-3) */
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402 /** sensitivity method for MH (-1,0-7) */
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404 /** tile number of sensitivity specification (>=0) */
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405 int sens_TPH_tileno[JPWL_MAX_NO_TILESPECS];
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406 /** sensitivity methods for TPHs (-1,0-7) */
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407 int sens_TPH[JPWL_MAX_NO_TILESPECS];
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408 /** enables JPWL correction at the decoder */
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410 /** expected number of components at the decoder */
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412 /** maximum number of tiles at the decoder */
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414 #endif /* USE_JPWL */
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416 /******** FLAGS *********/
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417 /** if ppm == 1 --> there was a PPM marker*/
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418 OPJ_UINT32 ppm : 1;
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419 /** tells if the parameter is a coding or decoding one */
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420 OPJ_UINT32 m_is_decoder : 1;
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424 typedef struct opj_j2k_dec
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426 /** locate in which part of the codestream the decoder is (main header, tile header, end) */
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427 OPJ_UINT32 m_state;
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429 * store decoding parameters common to all tiles (information like COD, COC in main header)
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431 opj_tcp_t *m_default_tcp;
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432 OPJ_BYTE *m_header_data;
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433 OPJ_UINT32 m_header_data_size;
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434 /** to tell the tile part length */
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435 OPJ_UINT32 m_sot_length;
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436 /** Only tiles index in the correct range will be decoded.*/
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437 OPJ_UINT32 m_start_tile_x;
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438 OPJ_UINT32 m_start_tile_y;
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439 OPJ_UINT32 m_end_tile_x;
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440 OPJ_UINT32 m_end_tile_y;
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441 /** to tell that a tile can be decoded. */
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442 OPJ_UINT32 m_can_decode : 1;
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443 OPJ_UINT32 m_discard_tiles : 1;
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444 OPJ_UINT32 m_skip_data : 1;
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448 typedef struct opj_j2k_enc
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450 /** Tile part number, regardless of poc, for each new poc, tp is reset to 1*/
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451 OPJ_UINT32 m_current_poc_tile_part_number; // tp_num
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453 /** Tile part number currently coding, taking into account POC. m_current_tile_part_number holds the total number of tile parts while encoding the last tile part.*/
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454 OPJ_UINT32 m_current_tile_part_number; //cur_tp_num
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457 locate the start position of the TLM marker
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458 after encoding the tilepart, a jump (in j2k_write_sod) is done to the TLM marker to store the value of its length.
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460 OPJ_SIZE_T m_tlm_start;
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462 * Stores the sizes of the tlm.
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464 OPJ_BYTE * m_tlm_sot_offsets_buffer;
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466 * The current offset of the tlm buffer.
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468 OPJ_BYTE * m_tlm_sot_offsets_current;
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470 /** Total num of tile parts in whole image = num tiles* num tileparts in each tile*/
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471 /** used in TLMmarker*/
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472 OPJ_UINT32 m_total_tile_parts; // totnum_tp
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474 /* encoded data for a tile */
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475 OPJ_BYTE * m_encoded_tile_data;
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477 /* size of the encoded_data */
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478 OPJ_UINT32 m_encoded_tile_size;
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480 /* encoded data for a tile */
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481 OPJ_BYTE * m_header_tile_data;
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483 /* size of the encoded_data */
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484 OPJ_UINT32 m_header_tile_data_size;
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493 JPEG-2000 codestream reader/writer
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495 typedef struct opj_j2k
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499 opj_j2k_dec_t m_decoder;
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500 opj_j2k_enc_t m_encoder;
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504 /** number of the tile curently concern by coding/decoding */
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505 OPJ_UINT32 m_current_tile_number;
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507 /** pointer to the encoded / decoded image */
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508 opj_image_t *m_image;
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510 /** Coding parameters */
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513 /** the list of procedures to exec **/
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514 struct opj_procedure_list * m_procedure_list;
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516 /** the list of validation procedures to follow to make sure the code is valid **/
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517 struct opj_procedure_list * m_validation_list;
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519 /** helper used to write the index file */
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520 opj_codestream_info_t *cstr_info;
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522 /** the current tile coder/decoder **/
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523 struct opj_tcd * m_tcd;
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525 OPJ_UINT32 m_is_decoder : 1;
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530 /** @name Exported functions */
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532 /* ----------------------------------------------------------------------- */
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534 * Creates a J2K decompression structure.
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536 * @return a handle to a J2K decompressor if successful, NULL otherwise.
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538 opj_j2k_t* j2k_create_decompress();
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541 * Destroys a jpeg2000 codec.
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543 * @param p_j2k the jpeg20000 structure to destroy.
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545 void j2k_destroy (opj_j2k_t *p_j2k);
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548 * Starts a compression scheme, i.e. validates the codec parameters, writes the header.
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550 * @param p_j2k the jpeg2000 codec.
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551 * @param cio the stream object.
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552 * @param p_manager the user event manager.
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554 * @return true if the codec is valid.
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556 bool j2k_start_compress(
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558 struct opj_stream_private *cio,
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559 struct opj_image * p_image,
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560 struct opj_event_mgr * p_manager
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563 * Ends the compression procedures and possibiliy add data to be read after the
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566 bool j2k_end_compress(opj_j2k_t *p_j2k, struct opj_stream_private *cio, struct opj_event_mgr * p_manager);
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569 * Sets up the decoder decoding parameters using user parameters.
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570 * Decoding parameters are stored in j2k->cp.
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572 * @param p_j2k J2K codec
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573 * @param p_parameters decompression parameters
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576 void j2k_setup_decoder(
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578 struct opj_dparameters *p_parameters
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581 * Reads a jpeg2000 codestream header structure.
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583 * @param cio the stream to read data from.
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584 * @param p_j2k the jpeg2000 codec.
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585 * @param p_manager the user event manager.
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587 * @return true if the box is valid.
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589 bool j2k_read_header(
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591 struct opj_image ** p_image,
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592 OPJ_INT32 * p_tile_x0,
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593 OPJ_INT32 * p_tile_y0,
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594 OPJ_UINT32 * p_tile_width,
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595 OPJ_UINT32 * p_tile_height,
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596 OPJ_UINT32 * p_nb_tiles_x,
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597 OPJ_UINT32 * p_nb_tiles_y,
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598 struct opj_stream_private *cio,
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599 struct opj_event_mgr * p_manager
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602 Decode an image from a JPEG-2000 codestream
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603 @param j2k J2K decompressor handle
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604 @param cio Input buffer stream
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605 @param cstr_info Codestream information structure if required, NULL otherwise
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606 @return Returns a decoded image if successful, returns NULL otherwise
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608 opj_image_t* j2k_decode(opj_j2k_t *j2k, struct opj_stream_private *cio, struct opj_event_mgr * p_manager);
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611 * Ends the decompression procedures and possibiliy add data to be read after the
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614 bool j2k_end_decompress(opj_j2k_t *j2k, struct opj_stream_private *cio, struct opj_event_mgr * p_manager);
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617 Decode an image form a JPT-stream (JPEG 2000, JPIP)
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618 @param j2k J2K decompressor handle
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619 @param cio Input buffer stream
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620 @param cstr_info Codestream information structure if required, NULL otherwise
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621 @return Returns a decoded image if successful, returns NULL otherwise
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623 opj_image_t* j2k_decode_jpt_stream(opj_j2k_t *j2k, struct opj_stream_private *cio, struct opj_codestream_info *cstr_info);
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626 Creates a J2K compression structure
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627 @param cinfo Codec context info
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628 @return Returns a handle to a J2K compressor if successful, returns NULL otherwise
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630 opj_j2k_t* j2k_create_compress();
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633 Setup the encoder parameters using the current image and using user parameters.
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634 Coding parameters are returned in j2k->cp.
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635 @param j2k J2K compressor handle
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636 @param parameters compression parameters
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637 @param image input filled image
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639 void j2k_setup_encoder(opj_j2k_t *j2k, opj_cparameters_t *parameters, opj_image_t *image, struct opj_event_mgr * p_manager);
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643 * @param p_j2k the jpeg2000 codec.
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644 * @param p_stream the stream to write data to.
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645 * @param p_manager the user event manager.
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647 bool j2k_write_tile (
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649 OPJ_UINT32 p_tile_index,
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651 OPJ_UINT32 p_data_size,
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652 struct opj_stream_private *p_stream,
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653 struct opj_event_mgr * p_manager
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657 * Converts an enum type progression order to string type.
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659 * @param prg_order the progression order to get.
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661 * @return the string representation of the gicen progression order.
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663 const char * j2k_convert_progression_order(OPJ_PROG_ORDER prg_order);
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667 * Encodes an image into a JPEG-2000 codestream
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671 struct opj_stream_private *cio,
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672 struct opj_event_mgr * p_manager
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674 bool j2k_setup_mct_encoding (opj_tcp_t * p_tcp,opj_image_t * p_image);
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677 * Decode tile data.
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678 * @param p_j2k the jpeg2000 codec.
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679 * @param p_stream the stream to write data to.
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680 * @param p_manager the user event manager.
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682 bool j2k_decode_tile (
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684 OPJ_UINT32 p_tile_index,
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686 OPJ_UINT32 p_data_size,
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687 struct opj_stream_private *p_stream,
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688 struct opj_event_mgr * p_manager
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691 * Reads a tile header.
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692 * @param p_j2k the jpeg2000 codec.
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693 * @param p_stream the stream to write data to.
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694 * @param p_manager the user event manager.
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696 bool j2k_read_tile_header (
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698 OPJ_UINT32 * p_tile_index,
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699 OPJ_UINT32 * p_data_size,
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700 OPJ_INT32 * p_tile_x0,
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701 OPJ_INT32 * p_tile_y0,
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702 OPJ_INT32 * p_tile_x1,
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703 OPJ_INT32 * p_tile_y1,
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704 OPJ_UINT32 * p_nb_comps,
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706 struct opj_stream_private *p_stream,
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707 struct opj_event_mgr * p_manager
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710 * Sets the given area to be decoded. This function should be called right after opj_read_header and before any tile header reading.
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712 * @param p_j2k the jpeg2000 codec.
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713 * @param p_start_x the left position of the rectangle to decode (in image coordinates).
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714 * @param p_end_x the right position of the rectangle to decode (in image coordinates).
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715 * @param p_start_y the up position of the rectangle to decode (in image coordinates).
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716 * @param p_end_y the bottom position of the rectangle to decode (in image coordinates).
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717 * @param p_manager the user event manager
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719 * @return true if the area could be set.
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721 bool j2k_set_decode_area(
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723 OPJ_INT32 p_start_x,
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724 OPJ_INT32 p_start_y,
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727 struct opj_event_mgr * p_manager
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731 /* ----------------------------------------------------------------------- */
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736 #endif /* __J2K_H */
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