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Diffstat (limited to 'plug-ins/file-jpeg/jpegqual.c')
| -rw-r--r-- | plug-ins/file-jpeg/jpegqual.c | 1082 |
1 files changed, 1082 insertions, 0 deletions
diff --git a/plug-ins/file-jpeg/jpegqual.c b/plug-ins/file-jpeg/jpegqual.c new file mode 100644 index 0000000..9dd5d9e --- /dev/null +++ b/plug-ins/file-jpeg/jpegqual.c @@ -0,0 +1,1082 @@ +/* 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 <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 700 or 800", "Superfine", -95 }, + { 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", -89 }, + { 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 = 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; +} |