| Quellcodebibliothek Statistik Leitseite products/Sources/formale Sprachen/C/Gimp/plug-ins/file-jpeg/ (Gimp Bildeditor Version 3.2.0©) Datei vom 14.2.2026 mit Größe 45 kB |
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Quelle jpegqual.c Sprache: C |
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/* jpegqual.c - analyze quality settings of existing JPEG files * * Copyright (C) 2007 Raphaël Quinet <raphael@gimp.org> * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <https://www.gnu.org/licenses/>. */ /* * This program analyzes the quantization tables of the JPEG files * given on the command line and displays their quality settings. * * It is useful for developers or maintainers of the JPEG plug-in * because it can be used to validate the formula used in * jpeg_detect_quality(), by comparing the quality reported for * different JPEG files. * * It can also dump quantization tables so that they can be integrated * into this program and recognized later. This can be used to identify * which device or which program saved a JPEG file. */ /* * TODO: * - rename this program! * - update quant_info[]. * - reorganize the options: 2 groups for print options and for selection. * - re-add the code to compare different formulas for approx. IJG quality. */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <setjmp.h> #include <glib.h> #include <glib/gstdio.h> #include <jpeglib.h> #include <jerror.h> #include "jpeg-quality.h" /* command-line options */ static gboolean option_summary = FALSE; static gboolean option_ctable = FALSE; static gboolean option_table_2cols = FALSE; static gboolean option_unknown = FALSE; static gboolean option_ignore_err = FALSE; static gchar **filenames = NULL; static const GOptionEntry option_entries[] = { { "ignore-errors", 'i', 0, G_OPTION_ARG_NONE, &option_ignore_err, "Continue processing other files after a JPEG error", NULL }, { "summary", 's', 0, G_OPTION_ARG_NONE, &option_summary, "Print summary information and closest IJG quality", NULL }, { "tables", 't', 0, G_OPTION_ARG_NONE, &option_table_2cols, "Dump quantization tables", NULL }, { "c-tables", 'c', 0, G_OPTION_ARG_NONE, &option_ctable, "Dump quantization tables as C code", NULL }, { "ctables", 0, G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_NONE, &option_ctable, NULL, NULL }, { "unknown", 'u', 0, G_OPTION_ARG_NONE, &option_unknown, "Only print information about files with unknown tables", NULL }, { G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &filenames, NULL, NULL }, { NULL } }; /* information about known JPEG quantization tables */ typedef struct { const guint hash; /* hash of luminance/chrominance tables */ const gint lum_sum; /* sum of luminance table divisors */ const gint chrom_sum; /* sum of chrominance table divisors */ const gint subsmp_h; /* horizontal subsampling (1st component) */ const gint subsmp_v; /* vertical subsampling (1st component) */ const gint num_quant_tables; /* number of tables (< 0 if no grayscale) */ const gchar *source_name; /* name of software of device */ const gchar *setting_name; /* name of quality setting */ const gint ijg_qual; /* closest IJG quality setting */ } QuantInfo; static const QuantInfo quant_info[] = { { 0x0a82648b, 64, 64, 0, 0, 2, "IJG JPEG Library", "quality 100", 100 }, { 0x4d981764, 86, 115, 0, 0, 2, "IJG JPEG Library", "quality 99", 99 }, { 0x62b71702, 151, 224, 0, 0, 2, "IJG JPEG Library", "quality 98", 98 }, { 0x29e095c5, 221, 333, 0, 0, 2, "IJG JPEG Library", "quality 97", 97 }, { 0xb62c754a, 292, 443, 0, 0, 2, "IJG JPEG Library", "quality 96", 96 }, { 0x8e55c78a, 369, 558, 0, 0, 2, "IJG JPEG Library", "quality 95", 95 }, { 0x0664d770, 441, 668, 0, 0, 2, "IJG JPEG Library", "quality 94", 94 }, { 0x59e5c5bc, 518, 779, 0, 0, 2, "IJG JPEG Library", "quality 93", 93 }, { 0xd6f26606, 592, 891, 0, 0, 2, "IJG JPEG Library", "quality 92", 92 }, { 0x8aa986ad, 667, 999, 0, 0, 2, "IJG JPEG Library", "quality 91", 91 }, { 0x17816eb1, 736, 1110, 0, 0, 2, "IJG JPEG Library", "quality 90", 90 }, { 0x75de9350, 814, 1223, 0, 0, 2, "IJG JPEG Library", "quality 89", 89 }, { 0x88fdf223, 884, 1332, 0, 0, 2, "IJG JPEG Library", "quality 88", 88 }, { 0xf40a6a50, 961, 1444, 0, 0, 2, "IJG JPEG Library", "quality 87", 87 }, { 0xe9f2c235, 1031, 1555, 0, 0, 2, "IJG JPEG Library", "quality 86", 86 }, { 0x82683892, 1109, 1666, 0, 0, 2, "IJG JPEG Library", "quality 85", 85 }, { 0xb1aecce8, 1179, 1778, 0, 0, 2, "IJG JPEG Library", "quality 84", 84 }, { 0x83375efe, 1251, 1888, 0, 0, 2, "IJG JPEG Library", "quality 83", 83 }, { 0x1e99f479, 1326, 2000, 0, 0, 2, "IJG JPEG Library", "quality 82", 82 }, { 0x1a02d360, 1398, 2111, 0, 0, 2, "IJG JPEG Library", "quality 81", 81 }, { 0x96129a0d, 1477, 2221, 0, 0, 2, "IJG JPEG Library", "quality 80", 80 }, { 0x64d4144b, 1552, 2336, 0, 0, 2, "IJG JPEG Library", "quality 79", 79 }, { 0x48a344ac, 1620, 2445, 0, 0, 2, "IJG JPEG Library", "quality 78", 78 }, { 0x16e820e3, 1692, 2556, 0, 0, 2, "IJG JPEG Library", "quality 77", 77 }, { 0x246b2e95, 1773, 2669, 0, 0, 2, "IJG JPEG Library", "quality 76", 76 }, { 0x10b035e9, 1858, 2780, 0, 0, 2, "IJG JPEG Library", "quality 75", 75 }, { 0xd5c653da, 1915, 2836, 0, 0, 2, "IJG JPEG Library", "quality 74", 74 }, { 0xe349618c, 1996, 2949, 0, 0, 2, "IJG JPEG Library", "quality 73", 73 }, { 0xb18e3dc3, 2068, 3060, 0, 0, 2, "IJG JPEG Library", "quality 72", 72 }, { 0x955d6e24, 2136, 3169, 0, 0, 2, "IJG JPEG Library", "quality 71", 71 }, { 0x641ee862, 2211, 3284, 0, 0, 2, "IJG JPEG Library", "quality 70", 70 }, { 0xe02eaf0f, 2290, 3394, 0, 0, 2, "IJG JPEG Library", "quality 69", 69 }, { 0xdb978df6, 2362, 3505, 0, 0, 2, "IJG JPEG Library", "quality 68", 68 }, { 0x76fa2371, 2437, 3617, 0, 0, 2, "IJG JPEG Library", "quality 67", 67 }, { 0x4882b587, 2509, 3727, 0, 0, 2, "IJG JPEG Library", "quality 66", 66 }, { 0x25556ae1, 2583, 3839, 0, 0, 2, "IJG JPEG Library", "quality 65", 65 }, { 0x103ec03a, 2657, 3950, 0, 0, 2, "IJG JPEG Library", "quality 64", 64 }, { 0x0627181f, 2727, 4061, 0, 0, 2, "IJG JPEG Library", "quality 63", 63 }, { 0x7133904c, 2804, 4173, 0, 0, 2, "IJG JPEG Library", "quality 62", 62 }, { 0x8452ef1f, 2874, 4282, 0, 0, 2, "IJG JPEG Library", "quality 61", 61 }, { 0xe2b013be, 2952, 4395, 0, 0, 2, "IJG JPEG Library", "quality 60", 60 }, { 0x6f87fbc2, 3021, 4506, 0, 0, 2, "IJG JPEG Library", "quality 59", 59 }, { 0x233f1c69, 3096, 4614, 0, 0, 2, "IJG JPEG Library", "quality 58", 58 }, { 0xa04bbcb3, 3170, 4726, 0, 0, 2, "IJG JPEG Library", "quality 57", 57 }, { 0xf3ccaaff, 3247, 4837, 0, 0, 2, "IJG JPEG Library", "quality 56", 56 }, { 0x1967dbe9, 3323, 4947, 0, 0, 2, "IJG JPEG Library", "quality 55", 55 }, { 0x44050d25, 3396, 5062, 0, 0, 2, "IJG JPEG Library", "quality 54", 54 }, { 0xd050ecaa, 3467, 5172, 0, 0, 2, "IJG JPEG Library", "quality 53", 53 }, { 0x9e99f8f1, 3541, 5281, 0, 0, 2, "IJG JPEG Library", "quality 52", 52 }, { 0xdf2423f4, 3621, 5396, 0, 0, 2, "IJG JPEG Library", "quality 51", 51 }, { 0xe0f48a64, 3688, 5505, 0, 0, 2, "IJG JPEG Library", "quality 50", 50 }, { 0xe2c4f0d4, 3755, 5614, 0, 0, 2, "IJG JPEG Library", "quality 49", 49 }, { 0x234f1bd7, 3835, 5729, 0, 0, 2, "IJG JPEG Library", "quality 48", 48 }, { 0xf198281e, 3909, 5838, 0, 0, 2, "IJG JPEG Library", "quality 47", 47 }, { 0x7de407a3, 3980, 5948, 0, 0, 2, "IJG JPEG Library", "quality 46", 46 }, { 0xb3aa597b, 4092, 6116, 0, 0, 2, "IJG JPEG Library", "quality 45", 45 }, { 0x32b48093, 4166, 6226, 0, 0, 2, "IJG JPEG Library", "quality 44", 44 }, { 0x9ea9f85f, 4280, 6396, 0, 0, 2, "IJG JPEG Library", "quality 43", 43 }, { 0x335d6006, 4393, 6562, 0, 0, 2, "IJG JPEG Library", "quality 42", 42 }, { 0xa727ea4a, 4463, 6672, 0, 0, 2, "IJG JPEG Library", "quality 41", 41 }, { 0x1889cfc4, 4616, 6897, 0, 0, 2, "IJG JPEG Library", "quality 40", 40 }, { 0xb1aa548e, 4719, 7060, 0, 0, 2, "IJG JPEG Library", "quality 39", 39 }, { 0x99bebdd3, 4829, 7227, 0, 0, 2, "IJG JPEG Library", "quality 38", 38 }, { 0xf728d062, 4976, 7447, 0, 0, 2, "IJG JPEG Library", "quality 37", 37 }, { 0xe1ba65b9, 5086, 7616, 0, 0, 2, "IJG JPEG Library", "quality 36", 36 }, { 0x2c8ba6a4, 5240, 7841, 0, 0, 2, "IJG JPEG Library", "quality 35", 35 }, { 0x03f7963a, 5421, 8114, 0, 0, 2, "IJG JPEG Library", "quality 34", 34 }, { 0xa19bed1e, 5571, 8288, 0, 0, 2, "IJG JPEG Library", "quality 33", 33 }, { 0x7945d01c, 5756, 8565, 0, 0, 2, "IJG JPEG Library", "quality 32", 32 }, { 0xcc36df1a, 5939, 8844, 0, 0, 2, "IJG JPEG Library", "quality 31", 31 }, { 0x3eb1b5ca, 6125, 9122, 0, 0, 2, "IJG JPEG Library", "quality 30", 30 }, { 0xd7f65293, 6345, 9455, 0, 0, 2, "IJG JPEG Library", "quality 29", 29 }, { 0x4c0a8178, 6562, 9787, 0, 0, 2, "IJG JPEG Library", "quality 28", 28 }, { 0x8281d1a1, 6823, 10175, 0, 0, 2, "IJG JPEG Library", "quality 27", 27 }, { 0x0bbc9f7e, 7084, 10567, 0, 0, 2, "IJG JPEG Library", "quality 26", 26 }, { 0xa8ac1cbd, 7376, 11010, 0, 0, 2, "IJG JPEG Library", "quality 25", 25 }, { 0x459b99fc, 7668, 11453, 0, 0, 2, "IJG JPEG Library", "quality 24", 24 }, { 0xda09c178, 7995, 11954, 0, 0, 2, "IJG JPEG Library", "quality 23", 23 }, { 0x1c651f15, 8331, 12511, 0, 0, 2, "IJG JPEG Library", "quality 22", 22 }, { 0x59025244, 8680, 13121, 0, 0, 2, "IJG JPEG Library", "quality 21", 21 }, { 0xa130f919, 9056, 13790, 0, 0, 2, "IJG JPEG Library", "quality 20", 20 }, { 0x109756cf, 9368, 14204, 0, 0, 2, "IJG JPEG Library", "quality 19", 19 }, { 0xe929cab5, 9679, 14267, 0, 0, 2, "IJG JPEG Library", "quality 18", 18 }, { 0xcddca370, 10027, 14346, 0, 0, 2, "IJG JPEG Library", "quality 17", 17 }, { 0xd5fc76c0, 10360, 14429, 0, 0, 2, "IJG JPEG Library", "quality 16", 16 }, { 0x533a1a03, 10714, 14526, 0, 0, 2, "IJG JPEG Library", "quality 15", 15 }, { 0x0d8adaff, 11081, 14635, 0, 0, 2, "IJG JPEG Library", "quality 14", 14 }, { 0x0d2ee95d, 11456, 14754, 0, 0, 2, "IJG JPEG Library", "quality 13", 13 }, { 0x3a1d59a0, 11861, 14864, 0, 0, 2, "IJG JPEG Library", "quality 12", 12 }, { 0x66555d04, 12240, 14985, 0, 0, 2, "IJG JPEG Library", "quality 11", 11 }, { 0x7fa051b1, 12560, 15110, 0, 0, 2, "IJG JPEG Library", "quality 10", 10 }, { 0x7b668ca3, 12859, 15245, 0, 0, 2, "IJG JPEG Library", "quality 9", 9 }, { 0xb44d7082, 13230, 15369, 0, 0, 2, "IJG JPEG Library", "quality 8", 8 }, { 0xe838d325, 13623, 15523, 0, 0, 2, "IJG JPEG Library", "quality 7", 7 }, { 0xb6f58977, 14073, 15731, 0, 0, 2, "IJG JPEG Library", "quality 6", 6 }, { 0xfd3e9fc4, 14655, 16010, 0, 0, 2, "IJG JPEG Library", "quality 5", 5 }, { 0x7782b922, 15277, 16218, 0, 0, 2, "IJG JPEG Library", "quality 4", 4 }, { 0x5a03ac45, 15946, 16320, 0, 0, 2, "IJG JPEG Library", "quality 3", 3 }, { 0xe0afaa36, 16315, 16320, 0, 0, 2, "IJG JPEG Library", "quality 2", 2 }, { 0x6d640b8b, 16320, 16320, 0, 0, 2, "IJG JPEG Library", "quality 1", 1 }, { 0x6d640b8b, 16320, 16320, 0, 0, 2, "IJG JPEG Library", "quality 0", 1 }, { 0x4b1d5895, 8008, 11954, 0, 0, 2, "IJG JPEG Library", "not baseline 23", -22 }, { 0x36c32c2c, 8370, 12511, 0, 0, 2, "IJG JPEG Library", "not baseline 22", -21 }, { 0xa971f812, 8774, 13121, 0, 0, 2, "IJG JPEG Library", "not baseline 21", -20 }, { 0xa01f5a9b, 9234, 13790, 0, 0, 2, "IJG JPEG Library", "not baseline 20", -19 }, { 0x0e45ab9a, 9700, 14459, 0, 0, 2, "IJG JPEG Library", "not baseline 19", -17 }, { 0x5e654320, 10209, 15236, 0, 0, 2, "IJG JPEG Library", "not baseline 18", -14 }, { 0x5fc0115c, 10843, 16182, 0, 0, 2, "IJG JPEG Library", "not baseline 17", -11 }, { 0x5d8b8e7b, 11505, 17183, 0, 0, 2, "IJG JPEG Library", "not baseline 16", -7 }, { 0x63f8b8c1, 12279, 18351, 0, 0, 2, "IJG JPEG Library", "not baseline 15", -5 }, { 0x675ecd7a, 13166, 19633, 0, 0, 2, "IJG JPEG Library", "not baseline 14", 0 }, { 0x7a65d374, 14160, 21129, 0, 0, 2, "IJG JPEG Library", "not baseline 13", 0 }, { 0xf5d0af6a, 15344, 22911, 0, 0, 2, "IJG JPEG Library", "not baseline 12", 0 }, { 0x0227aaf0, 16748, 24969, 0, 0, 2, "IJG JPEG Library", "not baseline 11", 0 }, { 0xffd2d3c8, 18440, 27525, 0, 0, 2, "IJG JPEG Library", "not baseline 10", 0 }, { 0x27f48623, 20471, 30529, 0, 0, 2, "IJG JPEG Library", "not baseline 9", 0 }, { 0xff1fab81, 23056, 34422, 0, 0, 2, "IJG JPEG Library", "not baseline 8", 0 }, { 0xcfeac62b, 26334, 39314, 0, 0, 2, "IJG JPEG Library", "not baseline 7", 0 }, { 0x4a8e947e, 30719, 45876, 0, 0, 2, "IJG JPEG Library", "not baseline 6", 0 }, { 0xe668af85, 36880, 55050, 0, 0, 2, "IJG JPEG Library", "not baseline 5", 0 }, { 0x6d4b1215, 46114, 68840, 0, 0, 2, "IJG JPEG Library", "not baseline 4", 0 }, { 0xf2734901, 61445, 91697, 0, 0, 2, "IJG JPEG Library", "not baseline 3", 0 }, { 0x9a2a42bc, 92200, 137625, 0, 0, 2, "IJG JPEG Library", "not baseline 2", 0 }, { 0x1b178d6d, 184400, 275250, 0, 0, 2, "IJG JPEG Library", "not baseline 1", 0 }, { 0x1b178d6d, 184400, 275250, 0, 0, 2, "IJG JPEG Library", "not baseline 0", 0 }, /* FIXME: the following entries are incomplete and need to be verified */ { 0x31258383, 319, 665, 2, 1, -2, "ACD ?", "?", -94 }, { 0x91d018a3, 436, 996, 2, 1, -2, "ACD ?", "?", -92 }, { 0x954ee70e, 664, 1499, 2, 1, -2, "ACD ?", "?", -88 }, { 0xe351bb55, 1590, 3556, 2, 2, -2, "ACD ?", "?", -71 }, { 0x5a81e2c0, 95, 166, 1, 1, 2, "Adobe Photoshop CS2", "quality 12", -98 }, { 0xcd0d41ae, 232, 443, 1, 1, 2, "Adobe Photoshop CS2", "quality 11", -96 }, { 0x1b141cb3, 406, 722, 1, 1, 2, "Adobe Photoshop CS2", "quality 10", -93 }, { 0xc84c0187, 539, 801, 1, 1, 2, "Adobe Photoshop CS2", "quality 9", -92 }, { 0x1e822409, 649, 853, 1, 1, 2, "Adobe Photoshop CS2", "quality 8", -91 }, { 0x3104202b, 786, 926, 1, 1, 2, "Adobe Photoshop CS2", "quality 7", -90 }, { 0xcd21f666, 717, 782, 2, 2, 2, "Adobe Photoshop CS2", "quality 6", -91 }, { 0x1b74e018, 844, 849, 2, 2, 2, "Adobe Photoshop CS2", "quality 5", -90 }, { 0xde39ed89, 962, 892, 2, 2, 2, "Adobe Photoshop CS2", "quality 4", -89 }, { 0xbdef8414, 1068, 941, 2, 2, 2, "Adobe Photoshop CS2", "quality 3", -89 }, { 0xfedf6432, 1281, 998, 2, 2, 2, "Adobe Photoshop CS2", "quality 2", -87 }, { 0x5d6afd92, 1484, 1083, 2, 2, 2, "Adobe Photoshop CS2", "quality 1", -86 }, { 0x4c7d2f7d, 1582, 1108, 2, 2, 2, "Adobe Photoshop CS2", "quality 0", -85 }, { 0x68e798b2, 95, 168, 1, 1, 2, "Adobe Photoshop CS2", "save for web 100", -98 }, { 0x9f3456f2, 234, 445, 1, 1, 2, "Adobe Photoshop CS2", "save for web 90", -96 }, { 0xda807dd5, 406, 724, 1, 1, 2, "Adobe Photoshop CS2", "save for web 80", -93 }, { 0xf70a37ce, 646, 1149, 1, 1, 2, "Adobe Photoshop CS2", "save for web 70", -90 }, { 0xf36979d2, 974, 1769, 1, 1, 2, "Adobe Photoshop CS2", "save for web 60", -85 }, { 0x4966f484, 1221, 1348, 2, 2, 2, "Adobe Photoshop CS2", "save for web 50", -86 }, { 0xaddf6d45, 1821, 1997, 2, 2, 2, "Adobe Photoshop CS2", "save for web 40", -79 }, { 0xeffa362a, 2223, 2464, 2, 2, 2, "Adobe Photoshop CS2", "save for web 30", -74 }, { 0x7aa980c1, 2575, 2903, 2, 2, 2, "Adobe Photoshop CS2", "save for web 20", -70 }, { 0x489e344f, 3514, 3738, 2, 2, 2, "Adobe Photoshop CS2", "save for web 10", -60 }, { 0x1a2cffe0, 535, 750, 1, 1, 2, "Adobe Photoshop 7.0", "quality 10", -93 }, { 0x1e96d5d3, 109, 171, 1, 1, 2, "Adobe Photoshop CS", "quality 12", -98 }, { 0x6771042c, 303, 466, 1, 1, 2, "Adobe Photoshop CS, Camera Raw 3", "quality 11", -95 }, { 0xd4553f25, 668, 830, 1, 1, 2, "Adobe Photoshop 7.0, CS", "quality 9", -91 }, { 0xd3b24cb4, 794, 895, 1, 1, 2, "Adobe Photoshop 7.0, CS", "quality 8", -90 }, { 0x4ad5990c, 971, 950, 1, 1, 2, "Adobe Photoshop CS", "quality 7", -89 }, { 0x4293dfde, 884, 831, 2, 2, 2, "Adobe Photoshop CS", "quality 6", -90 }, { 0xba0212ec, 1032, 889, 2, 2, 2, "Adobe Photoshop CS", "quality 5", -89 }, { 0x4b50947d, 1126, 940, 2, 2, 2, "Adobe Photoshop CS", "quality 4", -88 }, { 0xad0f8e5c, 1216, 977, 2, 2, 2, "Adobe Photoshop CS", "quality 3", -88 }, { 0x560b5f0c, 339, 670, 1, 1, 2, "Adobe Photoshop ?", "save for web 85", -94 }, { 0x9539b14b, 427, 613, 2, 2, 2, "Adobe Photoshop ?", "?", -94 }, { 0x841f2655, 525, 941, 1, 1, 2, "Adobe Photoshop ?", "save for web 75", -92 }, { 0xaa2161e2, 803, 1428, 1, 1, 2, "Adobe Photoshop ?", "save for web 65", -87 }, { 0x743feb84, 1085, 1996, 1, 1, 2, "Adobe Photoshop ?", "save for web 55", -83 }, { 0xe9f14743, 1156, 2116, 1, 1, 2, "Adobe Photoshop ?", "save for web 52", -82 }, { 0x1003c8fb, 1175, 2169, 1, 1, 2, "Adobe Photoshop ?", "save for web 51", -81 }, { 0xd7804c45, 2272, 2522, 2, 2, 2, "Adobe Photoshop ?", "save for web 29", -73 }, { 0xcb5aa8ad, 2515, 2831, 2, 2, 2, "Adobe ImageReady", "save for web 22", -70 }, { 0x956d2a00, 3822, 3975, 2, 2, 2, "Adobe ImageReady", "save for web 6", -57 }, { 0xba53e0c5, 4028, 4174, 2, 2, 2, "Adobe Photoshop ?", "save for web 3", -55 }, { 0x13c0c8bc, 513, 0, 1, 1, 1, "Adobe Photoshop ?", "?", -93 }, { 0x3fad5c43, 255, 393, 2, 1, 2, "Apple Quicktime 7.1 or 7.2", "?", -96 }, { 0x6529bd03, 513, 775, 2, 2, 2, "Apple Quicktime 7.2", "?", -93 }, { 0x354e610a, 543, 784, 2, 1, -2, "Apple Quicktime 7.1", "?", -92 }, { 0xd596795e, 361, 506, 2, 1, 2, "Apple ?", "?", -95 }, { 0x74da8ba7, 1511, 2229, 2, 2, 2, "Apple ?", "?", -79 }, { 0x6391ca2b, 188, 276, 2, 1, -2, "Canon EOS 300D, 350D or 400D", "Fine", -97 }, { 0x00474eb0, 708, 1057, 2, 1, -2, "Canon EOS 10D", "Normal", -90 }, { 0x535174bd, 533, 1325, 2, 1, -2, "Canon Digital Ixus v2", "Fine", -92 }, { 0x535174bd, 533, 1325, 2, 1, -2, "Canon PowerShot A95, S1, S2, SD400 or SD630", "Fine", -89 }, { 0xb7be6b97, 192, 556, 2, 1, -2, "Canon PowerShot S5 IS, A300, A430, S200, SD500, SD700, Ixus 70 { 0xb5b5c61d, 533, 1325, 1, 2, -2, "Canon Digital Ixus 400", "Fine", -89 }, { 0xa7a2c471, 288, 443, 2, 1, -3, "FujiFilm MX-2700", "?", -96 }, { 0x8db061f0, 389, 560, 2, 1, -3, "FujiFilm FinePix S700", "Fine", -94 }, { 0xbb7b97ba, 515, 774, 2, 1, -3, "FujiFilm FinePix 2600 Zoom", "Fine", -93 }, { 0x71bcdf92, 167, 240, 2, 2, -3, "HP PhotoSmart C850, C935", "?", -97 }, { 0x9542cc81, 1970, 1970, 2, 2, -3, "HP PhotoSmart C812", "?", -78 }, { 0xdb7b71d8, 369, 558, 2, 1, -3, "Kodak P880", "?", 95 }, { 0x82e461f8, 566, 583, 2, 2, -2, "Kodak V610", "Fine", -93 }, { 0x17816eb1, 736, 1110, 2, 2, -2, "Kodak DC240", "?", 90 }, { 0x17816eb1, 736, 1110, 1, 1, -2, "Kodak Imaging", "High (high res.)", 90 }, { 0x17816eb1, 736, 1110, 2, 1, -2, "Kodak Imaging", "High (medium res.)", 90 }, { 0x17816eb1, 736, 1110, 4, 1, -2, "Kodak Imaging", "High (low res.)", 90 }, { 0x3841f91b, 736, 0, 1, 1, 1, "Kodak Imaging", "High (grayscale)", 90 }, { 0xe0f48a64, 3688, 5505, 1, 1, -2, "Kodak Imaging", "Medium (high res.)", 50 }, { 0xe0f48a64, 3688, 5505, 2, 1, -2, "Kodak Imaging", "Medium (medium res.)", 50 }, { 0xe0f48a64, 3688, 5505, 4, 1, -2, "Kodak Imaging", "Medium (low res.)", 50 }, { 0x9ebccf53, 3688, 0, 1, 1, 1, "Kodak Imaging", "Medium (grayscale)", 50 }, { 0xa130f919, 9056, 13790, 1, 1, -2, "Kodak Imaging", "Low (high res.)", 20 }, { 0xa130f919, 9056, 13790, 2, 1, -2, "Kodak Imaging", "Low (medium res.)", 20 }, { 0xa130f919, 9056, 13790, 4, 1, -2, "Kodak Imaging", "Low (low res.)", 20 }, { 0x34216b8b, 9056, 0, 1, 1, 1, "Kodak Imaging", "Low (grayscale)", 20 }, { 0x403b528f, 161, 179, 1, 1, -2, "Lead ?", "?", -98 }, { 0x8550a881, 711, 1055, 1, 1, -2, "Lead ?", "?", -90 }, { 0x98fb09fc, 1079, 1610, 1, 1, -2, "Lead ?", "?", -85 }, { 0xfbb88fb8, 2031, 3054, 1, 1, -2, "Lead ?", "?", -72 }, { 0x5fa57f78, 4835, 7226, 1, 1, -2, "Lead ?", "?", -37 }, { 0x85b97881, 8199, 12287, 1, 1, -2, "Lead ?", "?", -22 }, { 0xd3cd4ad0, 96, 117, 2, 1, -2, "Leica Digilux 3", "?", -98 }, { 0x29e095c5, 221, 333, 2, 1, -2, "Leica M8", "?", 97 }, { 0xee344795, 582, 836, 2, 1, -2, "Medion ?", "?", -92 }, { 0x991408d7, 433, 667, 2, 1, -2, "Medion ?", "?", -94 }, { 0x10b035e9, 1858, 2780, 2, 2, 2, "Microsoft Office", "Default", 75 }, { 0x20fcfcb8, 116, 169, 2, 1, -2, "Nikon D50, D70, D70s, D80", "Fine", -98 }, { 0x2530fec2, 218, 333, 2, 1, -2, "Nikon D70 or D70s", "Normal", -97 }, { 0xe5dbee70, 616, 941, 2, 1, -2, "Nikon D70 or D70s", "Basic", -91 }, { 0x0e082d61, 671, 999, 2, 1, -2, "Nikon D70 or D70s", "Basic + raw", -90 }, { 0xcc6c9703, 127, 169, 2, 1, -2, "Nikon D70 v1.0", "Fine", -98 }, { 0x8cdfa365, 302, 444, 2, 1, -2, "Nikon D70 v1.0", "Fine", -95 }, { 0x23246639, 315, 499, 2, 1, -2, "Nikon D70 v1.0", "Fine", -95 }, { 0x978378a8, 329, 500, 2, 1, -2, "Nikon D70 v1.0", "Fine", -95 }, { 0x748a8379, 346, 500, 2, 1, -2, "Nikon D70 v1.0", "Fine", -95 }, { 0xa85255cd, 372, 558, 2, 1, -2, "Nikon D70 v1.0", "Fine", -94 }, { 0x016406e0, 389, 560, 2, 1, -2, "Nikon D70 v1.0", "Fine", -94 }, { 0xda3a50f1, 419, 611, 2, 1, -2, "Nikon D70 v1.0", "Fine", -94 }, { 0xd8e45108, 449, 668, 2, 1, -2, "Nikon D70 v1.0", "Fine", -93 }, { 0x8a62bf3c, 506, 775, 2, 1, -2, "Nikon D70 v1.0", "Fine", -93 }, { 0xc3108c99, 529, 781, 2, 1, -2, "Nikon D70 v1.0", "Fine", -92 }, { 0xeabc51a5, 261, 389, 2, 1, -2, "Nikon D50", "Normal", -96 }, { 0x0cddf617, 345, 499, 2, 1, -2, "Nikon D50", "Normal", -95 }, { 0x2b3b6401, 855, 1279, 2, 1, -2, "Nikon D40", "?", -88 }, { 0x5d1ca944, 667, 999, 2, 1, -3, "Nikon E4300", "Normal", 91 }, { 0xabcbdc47, 736, 1110, 2, 1, -3, "Nikon E4300", "Normal", 90 }, { 0x10b2ad77, 884, 1332, 2, 1, -3, "Nikon E4300", "Normal", 88 }, { 0x0a82648b, 64, 64, 1, 1, -2, "Nikon Browser 6", "High quality", 100 }, { 0xb091eaf2, 779, 1164, 1, 1, -2, "Nikon Browser 6 or PictureProject 1.6", "Standard quality" { 0x1a856066, 1697, 2554, 2, 1, -2, "Nikon Browser 6", "Standard eq", -76 }, { 0xdf0774bd, 2746, 5112, 2, 2, -2, "Nikon Browser 6", "Standard compression", -57 }, { 0xe2fd6fb9, 8024, 12006, 2, 2, -2, "Nikon Browser 6", "Maximum compression", -22 }, { 0x17816eb1, 736, 1110, 2, 2, -2, "Olympus Camedia Master", "High quality?", 90 }, { 0x96129a0d, 1477, 2221, 2, 2, -2, "Olympus u710,S710", "Super high quality?", 80 }, { 0x824f84b9, 437, 617, 2, 1, -2, "Olympus u30D,S410D,u410D", "High quality", -94 }, { 0x1b050d58, 447, 670, 2, 1, -2, "Olympus u30D,S410D,u410D", "High quality", -93 }, { 0x1b050d58, 447, 670, 2, 1, -2, "Olympus u30D,S410D,u410D", "High quality", -93 }, { 0x68058c37, 814, 1223, 2, 1, -3, "Olympus C960Z,D460Z", "Standard quality", 89 }, { 0x10b2ad77, 884, 1332, 2, 1, -3, "Olympus C211Z", "Standard quality", 88 }, { 0x0f5fa4cb, 1552, 2336, 2, 1, -3, "Olympus C990Z,D490Z", "High quality", 79 }, { 0xf51554a8, 261, 392, 2, 1, -2, "Panasonic DMC-FZ5", "High", -96 }, { 0xf01efe6e, 251, 392, 2, 1, -2, "Panasonic DMC-FZ30", "High", -96 }, { 0x08064360, 280, 445, 2, 1, -2, "Panasonic DMC-FZ30", "High", -96 }, { 0x05831bbb, 304, 448, 2, 1, -2, "Panasonic DMC-FZ30", "High", -95 }, { 0xe6c08bea, 316, 499, 2, 1, -2, "Panasonic DMC-FZ30", "High", -95 }, { 0xcb5f5f7d, 332, 550, 2, 1, -2, "Panasonic DMC-FZ30", "High", -95 }, { 0xb53cf359, 355, 555, 2, 1, -2, "Panasonic DMC-FZ30", "High", -95 }, { 0xdbcd2690, 375, 606, 2, 1, -2, "Panasonic DMC-FZ30", "High", -94 }, { 0x594a3212, 400, 615, 2, 1, -2, "Panasonic DMC-FZ30", "High", -94 }, { 0xde23f16a, 420, 667, 2, 1, -2, "Panasonic DMC-FZ30", "High", -94 }, { 0xc0a43b37, 501, 775, 2, 1, -2, "Panasonic DMC-FZ30", "High", -93 }, { 0xc298e887, 577, 891, 2, 1, -2, "Panasonic DMC-FZ30", "High", -92 }, { 0x039b6bc2, 324, 499, 2, 1, 2, "Ricoh Caplio R1V", "?", -95 }, { 0xf60dc348, 274, 443, 2, 1, 2, "Roxio PhotoSuite", "?", -96 }, { 0xc6f47fa4, 634, 943, 2, 1, -2, "Samsung Digimax V3", "?", -91 }, { 0xb9284f39, 1313, 1997, 2, 1, -2, "Samsung Digimax V3", "?", -82 }, { 0x5dedca50, 218, 331, 2, 1, -2, "Samsung Digimax S600", "?", -97 }, { 0x095451e2, 258, 389, 2, 1, -2, "Sony Cybershot", "?", -96 }, { 0x4d981764, 86, 115, 2, 1, -2, "Sony DSC-W55", "Fine", 99 }, { 0x6d2b20ce, 122, 169, 2, 1, -2, "Sony DSC-F828, DSC-F88", "?", -98 }, { 0x29e095c5, 221, 333, 2, 1, -2, "Sony DSC-W30, DSC-W50, DSC-H2, DSC-H5", "?", 97 }, { 0x59e5c5bc, 518, 779, 2, 1, -2, "Sony DSC-W70", "?", 93 }, { 0x96129a0d, 1477, 2221, 2, 2, -2, "Sony DSC-W30, DSC-P43, DSC-S600", "?", 80 }, { 0xa4d9a6d9, 324, 682, 2, 1, -2, "Sony DSLR-A100", "?", -94 }, { 0x17816eb1, 736, 1110, 2, 1, -2, "SonyEricsson K750i", "Fine", 90 }, { 0x10b035e9, 1858, 2780, 2, 1, -2, "SonyEricsson K750i or W200i", "Normal", 75 }, { 0x1b0ad9d5, 836, 1094, 2, 2, -2, "SonyEricsson K750i", "Panorama fine", -89 }, { 0x1cd8bb9f, 1672, 2188, 2, 2, -2, "SonyEricsson K750i", "Panorama normal", -79 }, { 0x81d174af, 361, 555, 2, 1, -2, "SonyEricsson K750i", "?", -95 }, { 0x991408d7, 433, 667, 2, 1, -2, "SonyEricsson K750i", "?", -94 }, { 0x00034978, 954, 1443, 2, 1, -2, "SonyEricsson K750i", "?", -87 }, { 0xd27667ab, 1024, 1504, 2, 1, -2, "SonyEricsson K750i", "?", -86 }, { 0x94e96153, 1097, 1615, 2, 1, -2, "SonyEricsson K750i", "?", -85 }, { 0xf524688a, 1168, 1727, 2, 1, -2, "SonyEricsson K750i", "?", -84 }, { 0x5e5e4237, 1324, 2000, 2, 1, -2, "SonyEricsson K750i", "?", -82 }, { 0x2e94a836, 1473, 2170, 2, 1, -2, "SonyEricsson K750i", "?", -80 }, { 0xdd957ed4, 1615, 2394, 2, 1, -2, "SonyEricsson K750i", "?", -78 }, { 0x4147561e, 1759, 2612, 2, 1, -2, "SonyEricsson K750i", "?", -76 }, { 0x6f5af2b1, 1491, 1491, 2, 1, -2, "SonyEricsson Z600", "Default", -83 }, { 0x641ee862, 2211, 3284, 2, 1, -2, "Trust 760 Powerc@m", "?", 70 }, { 0x0bd95282, 2211, 3284, 1, 2, -2, "Trust 760 Powerc@m", "?", 70 }, { 0xe9814c86, 1830, 2725, 1, 1, 2, "Xing VT-Compress", "?", -75 }, }; typedef struct { guint32 hashval; gint subsmp_h; gint subsmp_v; gint num_quant_tables; gint ijg_qual; GSList *files; guint16 luminance[DCTSIZE2]; guint16 chrominance[DCTSIZE2]; } QuantTableData; static GSList *found_tables = NULL; #if 0 /* FIXME ---v-v-v---------------------------------------------v-v-v--- */ static guint16 **ijg_luminance = NULL; /* luminance, baseline */ static guint16 **ijg_chrominance = NULL; /* chrominance, baseline */ static guint16 **ijg_luminance_nb = NULL; /* luminance, not baseline */ static guint16 **ijg_chrominance_nb = NULL; /* chrominance, not baseline */ /* * Initialize the IJG quantization tables for each quality setting. */ static void init_ijg_tables (void) { struct jpeg_compress_struct cinfo; struct jpeg_error_mgr jerr; gint q, i; ijg_luminance = g_new (guint16 *, 101); ijg_chrominance = g_new (guint16 *, 101); for (q = 0; q <= 100; q++) { ijg_luminance[q] = g_new (guint16, DCTSIZE2); ijg_chrominance[q] = g_new (guint16, DCTSIZE2); } cinfo.err = jpeg_std_error (&jerr); jpeg_create_compress (&cinfo); for (q = 0; q <= 100; q++) { jpeg_set_quality (&cinfo, q, TRUE); for (i = 0; i < DCTSIZE2; i++) ijg_luminance[q][i] = cinfo.quant_tbl_ptrs[0]->quantval[i]; for (i = 0; i < DCTSIZE2; i++) ijg_chrominance[q][i] = cinfo.quant_tbl_ptrs[1]->quantval[i]; } for (q = 0; q <= 100; q++) { jpeg_set_quality (&cinfo, q, FALSE); for (i = 0; i < DCTSIZE2; i++) ijg_luminance_nb[q][i] = cinfo.quant_tbl_ptrs[0]->quantval[i]; for (i = 0; i < DCTSIZE2; i++) ijg_chrominance_nb[q][i] = cinfo.quant_tbl_ptrs[1]->quantval[i]; } jpeg_destroy_compress (&cinfo); } /* * Check if two quantization tables are identical. */ static gboolean compare_tables (const guint16 *quant_table1, const guint16 *quant_table2) { gint i; g_return_val_if_fail (quant_table1 != NULL, FALSE); g_return_val_if_fail (quant_table2 != NULL, FALSE); for (i = 0; i < DCTSIZE2; i++) if (quant_table1[i] != quant_table2[i]) return FALSE; return TRUE; } #endif /* FIXME ---^-^-^--------------------------------------------^-^-^--- */ /* * Trivial hash function (simple, but good enough for 1 to 4 * 64 short ints). */ static guint32 hash_quant_tables (struct jpeg_decompress_struct *cinfo) { guint32 hashval; gint t; gint i; hashval = 11; for (t = 0; t < 4; t++) if (cinfo->quant_tbl_ptrs[t]) for (i = 0; i < DCTSIZE2; i++) hashval = hashval * 4177 + cinfo->quant_tbl_ptrs[t]->quantval[i]; return hashval; } static guint32 hash_transposed_quant_tables (struct jpeg_decompress_struct *cinfo) { guint32 hashval; gint t; gint i; gint j; hashval = 11; for (t = 0; t < 4; t++) if (cinfo->quant_tbl_ptrs[t]) for (i = 0; i < DCTSIZE; i++) for (j = 0; j < DCTSIZE; j++) hashval = hashval * 4177 + cinfo->quant_tbl_ptrs[t]->quantval[j * 8 + i]; return hashval; } static void add_unknown_table (struct jpeg_decompress_struct *cinfo, gchar *filename) { guint32 hashval; GSList *list; QuantTableData *table_data; gint num_quant_tables; gint t; gint i; hashval = hash_quant_tables (cinfo); /* linear search - the number of unknown tables is usually very small */ for (list = found_tables; list; list = list->next) { table_data = list->data; if (table_data->hashval == hashval && table_data->subsmp_h == cinfo->comp_info[0].h_samp_factor && table_data->subsmp_v == cinfo->comp_info[0].v_samp_factor) { /* this unknown table has already been seen in previous files */ table_data->files = g_slist_prepend (table_data->files, filename); return; } } /* not found => new table */ table_data = g_new (QuantTableData, 1); table_data->hashval = hashval; table_data->subsmp_h = cinfo->comp_info[0].h_samp_factor; table_data->subsmp_v = cinfo->comp_info[0].v_samp_factor; num_quant_tables = 0; for (t = 0; t < 4; t++) if (cinfo->quant_tbl_ptrs[t]) num_quant_tables++; table_data->num_quant_tables = num_quant_tables; table_data->ijg_qual = jpeg_detect_quality (cinfo); table_data->files = g_slist_prepend (NULL, filename); if (cinfo->quant_tbl_ptrs[0]) { for (i = 0; i < DCTSIZE2; i++) table_data->luminance[i] = cinfo->quant_tbl_ptrs[0]->quantval[i]; } else { for (i = 0; i < DCTSIZE2; i++) table_data->luminance[i] = 0; } if (cinfo->quant_tbl_ptrs[1]) { for (i = 0; i < DCTSIZE2; i++) table_data->chrominance[i] = cinfo->quant_tbl_ptrs[1]->quantval[i]; } else { for (i = 0; i < DCTSIZE2; i++) table_data->chrominance[i] = 0; } found_tables = g_slist_prepend (found_tables, table_data); } /* * Analyze the JPEG quantization tables and return a list of devices or * software that can generate the same tables and subsampling factors. */ static GSList * detect_source (struct jpeg_decompress_struct *cinfo, gint num_quant_tables) { guint lum_sum; guint chrom_sum; gint i; GSList *source_list; /* compute sum of luminance and chrominance quantization tables */ lum_sum = 0; chrom_sum = 0; if (cinfo->quant_tbl_ptrs[0]) { for (i = 0; i < DCTSIZE2; i++) lum_sum += cinfo->quant_tbl_ptrs[0]->quantval[i]; } if (cinfo->quant_tbl_ptrs[1]) { for (i = 0; i < DCTSIZE2; i++) chrom_sum += cinfo->quant_tbl_ptrs[1]->quantval[i]; } /* there can be more than one match (if sampling factors are compatible) */ source_list = NULL; if (chrom_sum == 0 && num_quant_tables == 1) { /* grayscale */ for (i = 0; i < G_N_ELEMENTS (quant_info); i++) { if (quant_info[i].lum_sum == lum_sum && (quant_info[i].subsmp_h == 0 || quant_info[i].subsmp_h == cinfo->comp_info[0].h_samp_factor) && (quant_info[i].subsmp_v == 0 || quant_info[i].subsmp_v == cinfo->comp_info[0].v_samp_factor) && quant_info[i].num_quant_tables > 0) { source_list = g_slist_append (source_list, (gpointer) (quant_info + i)); } } } else { /* RGB and other color spaces */ for (i = 0; i < G_N_ELEMENTS (quant_info); i++) { if (quant_info[i].lum_sum == lum_sum && quant_info[i].chrom_sum == chrom_sum && (quant_info[i].subsmp_h == 0 || quant_info[i].subsmp_h == cinfo->comp_info[0].h_samp_factor) && (quant_info[i].subsmp_v == 0 || quant_info[i].subsmp_v == cinfo->comp_info[0].v_samp_factor) && (quant_info[i].num_quant_tables == num_quant_tables || quant_info[i].num_quant_tables == -num_quant_tables)) { source_list = g_slist_append (source_list, (gpointer) (quant_info + i)); } } } return source_list; } /* * ... FIXME: docs */ static void print_summary (struct jpeg_decompress_struct *cinfo, gint num_quant_tables) { gint quality; gint i; GSList *source_list; /* detect JPEG quality - test the formula used in the jpeg plug-in */ quality = jpeg_detect_quality (cinfo); if (quality > 0) g_print ("\tQuality: %02d (exact)\n", quality); else if (quality < 0) g_print ("\tQuality: %02d (approx)\n", -quality); else g_print ("\tQuality: unknown\n"); /* JPEG sampling factors */ g_print ("\tSampling: %dx%d", cinfo->comp_info[0].h_samp_factor, cinfo->comp_info[0].v_samp_factor); if ((cinfo->num_components > 1 && cinfo->num_components != 3) || cinfo->comp_info[1].h_samp_factor != 1 || cinfo->comp_info[1].v_samp_factor != 1 || cinfo->comp_info[2].h_samp_factor != 1 || cinfo->comp_info[2].v_samp_factor != 1) { for (i = 1; i < cinfo->num_components; i++) g_print (",%dx%d", cinfo->comp_info[i].h_samp_factor, cinfo->comp_info[i].v_samp_factor); } g_print ("\n"); /* Number of quantization tables */ g_print ("\tQ.tables: %d\n", num_quant_tables); source_list = detect_source (cinfo, num_quant_tables); if (source_list) { GSList *l; guint32 hash; guint32 hash_t; hash = hash_quant_tables (cinfo); hash_t = hash_transposed_quant_tables (cinfo); for (l = source_list; l; l = l->next) { QuantInfo *source_info = l->data; const gchar *comment = ""; if (source_info->hash == hash) comment = ""; else if (source_info->hash == hash_t) comment = " (rotated)"; else if (num_quant_tables == 1) comment = " (grayscale)"; else comment = " (FALSE MATCH)"; g_print ("\tSource: %s - %s%s\n", source_info->source_name, source_info->setting_name, comment); } g_slist_free (source_list); } else g_print ("\tSource: unknown\n"); } /* * Print a quantization table as a C array. */ static void print_ctable (gint table_id, const guint16 *quant_table, gboolean more) { gint i; g_return_if_fail (quant_table != NULL); if (table_id >= 0) g_print (" { /* table %d */\n ", table_id); else g_print (" {\n "); for (i = 0; i < DCTSIZE2; i++) { if (i == DCTSIZE2 - 1) g_print ("%3d\n", quant_table[i]); else if ((i + 1) % DCTSIZE == 0) g_print ("%3d,\n ", quant_table[i]); else g_print ("%3d, ", quant_table[i]); } if (more) g_print (" },\n"); else g_print (" }\n"); } /* * Print one or two quantization tables, two columns. */ static void print_table_2cols (gint table1_id, const guint16 *quant_table1, gint table2_id, const guint16 *quant_table2) { gint i; gint j; if (quant_table2) g_print ("\tQuantization table %d: Quantization table %d:\n\t", table1_id, table2_id); else g_print ("\tQuantization table %d:\n\t", table1_id); for (i = 0; i < DCTSIZE; i++) { if (quant_table1) { for (j = 0; j < DCTSIZE; j++) { if (j != DCTSIZE - 1) g_print ("%3d ", quant_table1[i * DCTSIZE + j]); else { if (quant_table2) g_print ("%3d | ", quant_table1[i * DCTSIZE + j]); else if (i != DCTSIZE - 1) g_print ("%3d\n\t", quant_table1[i * DCTSIZE + j]); else g_print ("%3d\n", quant_table1[i * DCTSIZE + j]); } } } else { g_print (" | "); } if (quant_table2) { for (j = 0; j < DCTSIZE; j++) { if (j != DCTSIZE - 1) g_print ("%3d ", quant_table2[i * DCTSIZE + j]); else if (i != DCTSIZE - 1) g_print ("%3d\n\t", quant_table2[i * DCTSIZE + j]); else g_print ("%3d\n", quant_table2[i * DCTSIZE + j]); } } } } /* * Error handling as in the IJG libjpeg example. */ typedef struct my_error_mgr { struct jpeg_error_mgr pub; /* "public" fields */ #ifdef __ia64__ long double dummy; /* bug #138357 */ #endif jmp_buf setjmp_buffer; /* for return to caller */ } *my_error_ptr; static void my_error_exit (j_common_ptr cinfo) { my_error_ptr myerr = (my_error_ptr) cinfo->err; (*cinfo->err->output_message) (cinfo); longjmp (myerr->setjmp_buffer, 1); } /* * Analyze a JPEG file according to the command-line options. */ static gboolean analyze_file (gchar *filename) { struct jpeg_decompress_struct cinfo; struct my_error_mgr jerr; FILE *f; gint i; gint num_quant_tables; GSList *source_list; if ((f = g_fopen (filename, "rb")) == NULL) { g_printerr ("Cannot open '%s'\n", filename); return FALSE; } if (option_summary) g_print ("%s:\n", filename); cinfo.err = jpeg_std_error (&jerr.pub); jerr.pub.error_exit = my_error_exit; if (setjmp (jerr.setjmp_buffer)) { /* if we get here, the JPEG code has signaled an error. */ jpeg_destroy_decompress (&cinfo); fclose (f); return FALSE; } jpeg_create_decompress (&cinfo); jpeg_stdio_src (&cinfo, f); jpeg_read_header (&cinfo, TRUE); num_quant_tables = 0; for (i = 0; i < 4; i++) if (cinfo.quant_tbl_ptrs[i]) num_quant_tables++; source_list = detect_source (&cinfo, num_quant_tables); if (! source_list) { add_unknown_table (&cinfo, filename); } if (! option_unknown) { if (option_summary) print_summary (&cinfo, num_quant_tables); if (option_ctable) { g_print (" {\n /* %s */\n \"?\", \"?\",\n %d, %d,\n %d,\n", filename, cinfo.comp_info[0].h_samp_factor, cinfo.comp_info[0].v_samp_factor, num_quant_tables); for (i = 0; i < 4; i++) if (cinfo.quant_tbl_ptrs[i]) print_ctable (i, cinfo.quant_tbl_ptrs[i]->quantval, (i < 3) && cinfo.quant_tbl_ptrs[i + 1]); g_print (" },\n"); } if (option_table_2cols) { print_table_2cols (0, cinfo.quant_tbl_ptrs[0]->quantval, 1, cinfo.quant_tbl_ptrs[1]->quantval); if (cinfo.quant_tbl_ptrs[2] || cinfo.quant_tbl_ptrs[3]) print_table_2cols (2, cinfo.quant_tbl_ptrs[2]->quantval, 3, cinfo.quant_tbl_ptrs[3]->quantval); } } if (source_list) g_slist_free (source_list); jpeg_destroy_decompress (&cinfo); fclose (f); return TRUE; } /* * ... FIXME: docs */ static void print_unknown_tables (void) { GSList *list; GSList *flist; QuantTableData *table_data; gint num_files; gint total_files = 0; for (list = found_tables; list; list = list->next) { table_data = list->data; if (option_ctable) { g_print (" {\n"); num_files = 0; for (flist = table_data->files; flist; flist = flist->next) { g_print(" /* %s */\n", (gchar *)(flist->data)); num_files++; } { /* FIXME */ guint lum_sum; guint chrom_sum; gint i; total_files += num_files; lum_sum = 0; chrom_sum = 0; for (i = 0; i < DCTSIZE2; i++) lum_sum += table_data->luminance[i]; for (i = 0; i < DCTSIZE2; i++) chrom_sum += table_data->chrominance[i]; g_print (" /* hash 0x%x, IJG %d, lum %d, chrom %d, files: %d */\n", table_data->hashval, table_data->ijg_qual, lum_sum, chrom_sum, num_files); if (chrom_sum == 0 && table_data->num_quant_tables == 1) { /* grayscale */ for (i = 0; i < G_N_ELEMENTS (quant_info); i++) { if (quant_info[i].lum_sum == lum_sum && (quant_info[i].subsmp_h == 0 || quant_info[i].subsmp_h == table_data->subsmp_h) && (quant_info[i].subsmp_v == 0 || quant_info[i].subsmp_v == table_data->subsmp_v) && quant_info[i].num_quant_tables > 0) { g_print(" XXX \"%s\", \"%s\",\n", quant_info[i].source_name, quant_info[i].setting_name); } } } else { /* RGB and other color spaces */ for (i = 0; i < G_N_ELEMENTS (quant_info); i++) { if (quant_info[i].lum_sum == lum_sum && quant_info[i].chrom_sum == chrom_sum && (quant_info[i].subsmp_h == 0 || quant_info[i].subsmp_h == table_data->subsmp_h) && (quant_info[i].subsmp_v == 0 || quant_info[i].subsmp_v == table_data->subsmp_v) && (quant_info[i].num_quant_tables == table_data->num_quant_tables || quant_info[i].num_quant_tables == -table_data->num_quant_tables)) { g_print(" XXX \"%s\", \"%s\",\n", quant_info[i].source_name, quant_info[i].setting_name); } } } } /* FIXME */ g_print (" \"?\", \"? (hash %x)\",\n" " %d, %d,\n %d,\n", table_data->hashval, table_data->subsmp_h, table_data->subsmp_v, -table_data->num_quant_tables); print_ctable (-1, table_data->luminance, TRUE); print_ctable (-1, table_data->chrominance, FALSE); g_print (" },\n"); } } g_print ("/* TOTAL FILES: %d */\n", total_files); } /* * Some compiler told me that it needed a function called main()... */ int main (int argc, char *argv[]) { GOptionContext *context; GError *error = NULL; gint i; g_set_prgname ("jpegqual"); context = g_option_context_new ("FILE [...] - analyzes JPEG quantization tables"); g_option_context_add_main_entries (context, option_entries, NULL /* skip i18n? */); if (! g_option_context_parse (context, &argc, &argv, &error)) { g_printerr ("%s\n", error->message); g_error_free (error); return EXIT_FAILURE; } if (! filenames) { g_printerr ("Missing file name. Try the option --help for help\n"); return EXIT_FAILURE; } if (!option_summary && !option_ctable && !option_table_2cols) { g_printerr ("Missing output option. Assuming that you wanted --summary.\n"); option_summary = TRUE; } for (i = 0; filenames[i]; i++) { if (! analyze_file (filenames[i]) && ! option_ignore_err) return EXIT_FAILURE; } if (option_unknown && found_tables) { print_unknown_tables (); } return EXIT_SUCCESS; }
¤ Dauer der Verarbeitung: 0.17 Sekunden (vorverarbeitet am 2026-11-04) ¤*© Formatika GbR, Deutschland |
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2026-11-01