Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/leptonica/src/jp2kheader.c @ 32:72c1b70d4f5c

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author Franz Glasner <fzglas.hg@dom66.de>
date Sun, 21 Sep 2025 15:10:12 +0200
parents b50eed0cc0ef
children
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1 /*====================================================================*
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2 - Copyright (C) 2001 Leptonica. All rights reserved.
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3 -
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4 - Redistribution and use in source and binary forms, with or without
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5 - modification, are permitted provided that the following conditions
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6 - are met:
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7 - 1. Redistributions of source code must retain the above copyright
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8 - notice, this list of conditions and the following disclaimer.
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9 - 2. Redistributions in binary form must reproduce the above
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10 - copyright notice, this list of conditions and the following
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11 - disclaimer in the documentation and/or other materials
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12 - provided with the distribution.
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13 -
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14 - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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15 - ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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16 - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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17 - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANY
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18 - CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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19 - EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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20 - PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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21 - PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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22 - OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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23 - NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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24 - SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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25 *====================================================================*/
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27 /*!
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28 * \file jp2kheader.c
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29 * <pre>
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30 *
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31 * Read header
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32 * l_int32 readHeaderJp2k()
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33 * l_int32 freadHeaderJp2k()
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34 * l_int32 readHeaderMemJp2k()
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35 * l_int32 fgetJp2kResolution()
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36 * l_int32 readResolutionMemJp2k()
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37 *
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38 * Note: these function read image metadata from a jp2k file, without
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39 * using any jp2k libraries.
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40 *
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41 * To read and write jp2k data, using the OpenJPEG library
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42 * (http://www.openjpeg.org), see jpegio.c.
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43 * </pre>
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44 */
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45
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46 #ifdef HAVE_CONFIG_H
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47 #include <config_auto.h>
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48 #endif /* HAVE_CONFIG_H */
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50 #include <string.h>
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51 #include <math.h>
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52 #include "allheaders.h"
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54 #ifndef NO_CONSOLE_IO
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55 #define DEBUG_CODEC 0
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56 #endif /* ~NO_CONSOLE_IO */
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58 /* --------------------------------------------*/
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59 #if USE_JP2KHEADER /* defined in environ.h */
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60 /* --------------------------------------------*/
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62 /* a sanity check on the size read from file */
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63 static const l_int32 MAX_JP2K_WIDTH = 100000;
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64 static const l_int32 MAX_JP2K_HEIGHT = 100000;
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65
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66 /*--------------------------------------------------------------------*
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67 * Stream interface *
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68 *--------------------------------------------------------------------*/
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69 /*!
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70 * \brief readHeaderJp2k()
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71 *
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72 * \param[in] filename
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73 * \param[out] pw [optional]
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74 * \param[out] ph [optional]
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75 * \param[out] pbps [optional] bits/sample
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76 * \param[out] pspp [optional] samples/pixel
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77 * \param[out] pcodec [optional] L_JP2_CODEC or L_J2K_CODEC
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78 * \return 0 if OK, 1 on error
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79 */
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80 l_ok
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81 readHeaderJp2k(const char *filename,
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82 l_int32 *pw,
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83 l_int32 *ph,
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84 l_int32 *pbps,
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85 l_int32 *pspp,
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86 l_int32 *pcodec)
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87 {
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88 l_int32 ret;
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89 FILE *fp;
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90
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91 if (!filename)
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92 return ERROR_INT("filename not defined", __func__, 1);
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93
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94 if ((fp = fopenReadStream(filename)) == NULL)
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95 return ERROR_INT_1("image file not found", filename, __func__, 1);
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96 ret = freadHeaderJp2k(fp, pw, ph, pbps, pspp, pcodec);
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97 fclose(fp);
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98 return ret;
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99 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
100
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parents:
diff changeset
101
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
102 /*!
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
103 * \brief freadHeaderJp2k()
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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104 *
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
105 * \param[in] fp file stream opened for read
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
106 * \param[out] pw [optional]
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
107 * \param[out] ph [optional]
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parents:
diff changeset
108 * \param[out] pbps [optional] bits/sample
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parents:
diff changeset
109 * \param[out] pspp [optional] samples/pixel
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parents:
diff changeset
110 * \param[out] pcodec [optional] L_JP2_CODEC or L_J2K_CODEC
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
111 * \return 0 if OK, 1 on error
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
112 */
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
113 l_ok
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
114 freadHeaderJp2k(FILE *fp,
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
115 l_int32 *pw,
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parents:
diff changeset
116 l_int32 *ph,
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parents:
diff changeset
117 l_int32 *pbps,
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
118 l_int32 *pspp,
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
119 l_int32 *pcodec)
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
120 {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
121 l_uint8 buf[120]; /* usually just need the first 80 bytes */
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
122 l_int32 nread, ret;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
123
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124 if (!fp)
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125 return ERROR_INT("fp not defined", __func__, 1);
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parents:
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126
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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127 rewind(fp);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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128 nread = fread(buf, 1, sizeof(buf), fp);
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parents:
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129 if (nread != sizeof(buf))
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parents:
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130 return ERROR_INT("read failure", __func__, 1);
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131
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132 ret = readHeaderMemJp2k(buf, sizeof(buf), pw, ph, pbps, pspp, pcodec);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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133 rewind(fp);
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parents:
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134 return ret;
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135 }
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136
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parents:
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137
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138 /*!
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139 * \brief readHeaderMemJp2k()
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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140 *
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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141 * \param[in] data
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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142 * \param[in] size at least 80
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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143 * \param[out] pw [optional]
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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144 * \param[out] ph [optional]
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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145 * \param[out] pbps [optional] bits/sample
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parents:
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146 * \param[out] pspp [optional] samples/pixel
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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147 * \param[out] pcodec [optional] L_JP2_CODEC or L_J2K_CODEC
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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148 * \return 0 if OK, 1 on error
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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149 *
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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150 * <pre>
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Franz Glasner <fzglas.hg@dom66.de>
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151 * Notes:
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parents:
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152 * (1) The ISO/IEC reference for jpeg2000 is
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153 * http://www.jpeg.org/public/15444-1annexi.pdf
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parents:
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154 * and the file format syntax begins at page 127.
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parents:
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155 * (2) With a image file codec (L_JP2_CODEC), the Image Header Box
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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156 * begins with 'ihdr' = 0x69686472 in big-endian order. This
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
157 * typically, but not always, starts on byte 44, with the
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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158 * big-endian data fields beginning at byte 48:
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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159 * h: 4 bytes
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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160 * w: 4 bytes
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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161 * spp: 2 bytes
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
162 * bps: 1 byte (contains bps - 1)
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
163 * (3) With a codestream codec (L_J2K_CODEC), the first 4 bytes are
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
164 * 0xff4fff51. The fields for w and h appear to start on byte 8,
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parents:
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165 * and the fields for spp and bps appear to start on byte 40.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
166 * </pre>
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
167 */
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
168 l_ok
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
169 readHeaderMemJp2k(const l_uint8 *data,
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
170 size_t size,
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
171 l_int32 *pw,
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
172 l_int32 *ph,
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
173 l_int32 *pbps,
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parents:
diff changeset
174 l_int32 *pspp,
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
175 l_int32 *pcodec)
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
176 {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
177 l_int32 format, val, w, h, bps, spp, loc, found, index, codec;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
178 l_uint8 ihdr[4] = {0x69, 0x68, 0x64, 0x72}; /* 'ihdr' */
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parents:
diff changeset
179
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parents:
diff changeset
180 if (pw) *pw = 0;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
181 if (ph) *ph = 0;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
182 if (pbps) *pbps = 0;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
183 if (pspp) *pspp = 0;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
184 if (pcodec) *pcodec = 0;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
185 if (!data)
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
186 return ERROR_INT("data not defined", __func__, 1);
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parents:
diff changeset
187 if (size < 120)
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
188 return ERROR_INT("size < 80", __func__, 1);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
189 findFileFormatBuffer(data, &format);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
190 if (format != IFF_JP2)
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
191 return ERROR_INT("not jp2 file", __func__, 1);
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parents:
diff changeset
192
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
193 /* Find beginning of the image metadata */
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
194 if (!memcmp(data, "\xff\x4f\xff\x51", 4)) { /* codestream */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
195 index = 8;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
196 codec = L_J2K_CODEC;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
197 } else { /* file data with image header box 'ihdr' */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
198 arrayFindSequence(data, size, ihdr, 4, &loc, &found);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
199 if (!found)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
200 return ERROR_INT("image parameters not found", __func__, 1);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
201 index = loc + 4;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
202 codec = L_JP2_CODEC;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
203 #if DEBUG_CODEC
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
204 if (loc != 44)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
205 L_INFO("Beginning of ihdr is at byte %d\n", __func__, loc);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
206 #endif /* DEBUG_CODEC */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
207 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
208 if (pcodec) *pcodec = codec;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
209
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
210 if (codec == L_JP2_CODEC) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
211 if (size < index + 4 * 3)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
212 return ERROR_INT("header size is too small", __func__, 1);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
213 val = *(l_uint32 *)(data + index);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
214 h = convertOnLittleEnd32(val);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
215 val = *(l_uint32 *)(data + index + 4);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
216 w = convertOnLittleEnd32(val);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
217 val = *(l_uint16 *)(data + index + 8);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
218 spp = convertOnLittleEnd16(val);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
219 bps = *(data + index + 10) + 1;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
220 } else { /* codec == L_J2K_CODEC */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
221 if (size < index + 4 * 9)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
222 return ERROR_INT("header size is too small", __func__, 1);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
223 val = *(l_uint32 *)(data + index);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
224 w = convertOnLittleEnd32(val);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
225 val = *(l_uint32 *)(data + index + 4);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
226 h = convertOnLittleEnd32(val);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
227 val = *(l_uint16 *)(data + index + 32);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
228 spp = convertOnLittleEnd16(val);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
229 bps = *(data + index + 34) + 1;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
230 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
231 #if DEBUG_CODEC
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
232 lept_stderr("h = %d, w = %d, codec: %s, spp = %d, bps = %d\n", h, w,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
233 (codec == L_JP2_CODEC ? "jp2" : "j2k"), spp, bps);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
234 #endif /* DEBUG_CODEC */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
235
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
236 if (w < 1 || h < 1)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
237 return ERROR_INT("w and h must both be > 0", __func__, 1);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
238 if (w > MAX_JP2K_WIDTH || h > MAX_JP2K_HEIGHT)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
239 return ERROR_INT("unrealistically large sizes", __func__, 1);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
240 if (spp != 1 && spp != 3 && spp != 4)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
241 return ERROR_INT("spp must be in 1, 3 or 4", __func__, 1);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
242 if (bps != 8 && bps != 16)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
243 return ERROR_INT("bps must be 8 or 16", __func__, 1);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
244 if (pw) *pw = w;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
245 if (ph) *ph = h;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
246 if (pspp) *pspp = spp;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
247 if (pbps) *pbps = bps;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
248 return 0;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
249 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
250
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
251
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
252 /*
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
253 * \brief fgetJp2kResolution()
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
254 *
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
255 * \param[in] fp file stream opened for read
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
256 * \param[oui] pxres in ppi
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
257 * \param[oui] pyres in ppi
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
258 * \return 0 if found, 1 if not found or on error
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
259 *
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
260 * <pre>
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
261 * Notes:
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
262 * (1) If the capture resolution field is not set, this is not an error;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
263 * the returned resolution values are 0 (designating 'unknown').
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
264 * (2) Side-effect: this rewinds the stream.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
265 * (3) The capture resolution box is optional in the jp2 spec, and
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
266 * it is usually not written.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
267 * (4) The big-endian data fields that follow the 4 bytes of 'resc' are:
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
268 * ynum: 2 bytes
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
269 * ydenom: 2 bytes
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
270 * xnum: 2 bytes
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
271 * xdenom: 2 bytes
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
272 * yexp: 1 byte
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
273 * xexp: 1 byte
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
274 * </pre>
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
275 */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
276 l_int32
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
277 fgetJp2kResolution(FILE *fp,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
278 l_int32 *pxres,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
279 l_int32 *pyres)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
280 {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
281 l_uint8 *data;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
282 size_t nbytes;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
283 l_ok ok;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
284
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
285 if (!fp)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
286 return ERROR_INT("stream not opened", __func__, 1);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
287
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
288 rewind(fp);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
289 data = l_binaryReadStream(fp, &nbytes);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
290 rewind(fp);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
291
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
292 ok = readResolutionMemJp2k(data, nbytes, pxres, pyres);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
293
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
294 LEPT_FREE(data);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
295 return ok;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
296 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
297
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
298
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
299 /*!
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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300 * \brief readResolutionMemJp2k()
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301 *
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302 * \param[in] data const; jp2k-encoded
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303 * \param[in] nbytes of data
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304 * \param[out] pxres [optional]
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305 * \param[out] pyres [optional]
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306 * \return 0 if OK, 1 on error
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307 */
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308 l_ok
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309 readResolutionMemJp2k(const l_uint8 *data,
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310 size_t nbytes,
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311 l_int32 *pxres,
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312 l_int32 *pyres)
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313 {
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314 l_uint8 xexp, yexp;
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315 l_uint16 xnum, ynum, xdenom, ydenom; /* these jp2k fields are 2-byte */
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316 l_int32 loc, found;
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317 l_uint8 resc[4] = {0x72, 0x65, 0x73, 0x63}; /* 'resc' */
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318 l_float64 xres, yres, maxres;
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319
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320 if (pxres) *pxres = 0;
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321 if (pyres) *pyres = 0;
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322 if (!pxres || !pyres)
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323 return ERROR_INT("&xres and &yres not both defined", __func__, 1);
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324
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325 /* Search for the start of the first capture resolution box: 'resc' */
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326 arrayFindSequence(data, nbytes, resc, 4, &loc, &found);
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327 if (!found) {
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328 L_WARNING("image resolution not found\n", __func__);
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329 return 1;
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330 }
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331 if (nbytes < 80 || loc >= nbytes - 13) {
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332 L_WARNING("image resolution found without enough space\n", __func__);
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333 return 1;
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334 }
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335
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336 /* Extract the fields and calculate the resolution in pixels/meter.
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337 * See section 1.5.3.7.1 of JPEG 2000 ISO/IEC 15444-1 spec. */
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338 ynum = data[loc + 5] << 8 | data[loc + 4];
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339 ynum = convertOnLittleEnd16(ynum);
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340 ydenom = data[loc + 7] << 8 | data[loc + 6];
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341 ydenom = convertOnLittleEnd16(ydenom);
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342 xnum = data[loc + 9] << 8 | data[loc + 8];
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343 xnum = convertOnLittleEnd16(xnum);
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344 xdenom = data[loc + 11] << 8 | data[loc + 10];
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345 xdenom = convertOnLittleEnd16(xdenom);
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346 if (ydenom == 0 || xdenom == 0) {
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347 L_WARNING("bad data: ydenom or xdenom is 0\n", __func__);
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348 return 1;
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349 }
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350 yexp = data[loc + 12];
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351 xexp = data[loc + 13];
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352 yres = ((l_float64)ynum / (l_float64)ydenom) * pow(10.0, (l_float64)yexp);
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353 xres = ((l_float64)xnum / (l_float64)xdenom) * pow(10.0, (l_float64)xexp);
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354
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355 /* Convert from pixels/meter to ppi */
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356 yres *= (300.0 / 11811.0);
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357 xres *= (300.0 / 11811.0);
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358
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359 /* Sanity check for bad data */
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360 maxres = 100000.0; /* ppi */
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361 if (xres > maxres || yres > maxres) {
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362 L_WARNING("ridiculously large resolution\n", __func__);
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363 } else {
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364 *pyres = (l_int32)(yres + 0.5);
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365 *pxres = (l_int32)(xres + 0.5);
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366 }
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367
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368 return 0;
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369 }
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370
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371 /* --------------------------------------------*/
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372 #endif /* USE_JP2KHEADER */