1548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen/* exif-content.c 2548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * 3548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * Copyright (c) 2001 Lutz Mueller <lutz@users.sourceforge.net> 4548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * 5548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * This library is free software; you can redistribute it and/or 6548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * modify it under the terms of the GNU Lesser General Public 7548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * License as published by the Free Software Foundation; either 8548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * version 2 of the License, or (at your option) any later version. 9548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * 10548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * This library is distributed in the hope that it will be useful, 11548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * but WITHOUT ANY WARRANTY; without even the implied warranty of 12548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * Lesser General Public License for more details. 14548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * 15548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * You should have received a copy of the GNU Lesser General Public 16548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * License along with this library; if not, write to the 17548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 18548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * Boston, MA 02110-1301 USA. 19548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen */ 20548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 21548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen#include <config.h> 22548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 23548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen#include <libexif/exif-content.h> 24548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen#include <libexif/exif-system.h> 25548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 26548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen#include <stdlib.h> 27548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen#include <stdio.h> 28548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen#include <string.h> 29548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 30548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen/* unused constant 31548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * static const unsigned char ExifHeader[] = {0x45, 0x78, 0x69, 0x66, 0x00, 0x00}; 32548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen */ 33548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 34548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissenstruct _ExifContentPrivate 35548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen{ 36548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen unsigned int ref_count; 37548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 38548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen ExifMem *mem; 39548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen ExifLog *log; 40548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen}; 41548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 42548dde4863e9a2315e3f327efe63ff55949addb8Marco NelissenExifContent * 43548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissenexif_content_new (void) 44548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen{ 45548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen ExifMem *mem = exif_mem_new_default (); 46548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen ExifContent *content = exif_content_new_mem (mem); 47548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 48548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen exif_mem_unref (mem); 49548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 50548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen return content; 51548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen} 52548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 53548dde4863e9a2315e3f327efe63ff55949addb8Marco NelissenExifContent * 54548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissenexif_content_new_mem (ExifMem *mem) 55548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen{ 56548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen ExifContent *content; 57548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 58548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen if (!mem) return NULL; 59548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 60548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen content = exif_mem_alloc (mem, (ExifLong) sizeof (ExifContent)); 61548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen if (!content) 62548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen return NULL; 63548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen content->priv = exif_mem_alloc (mem, 64548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen (ExifLong) sizeof (ExifContentPrivate)); 65548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen if (!content->priv) { 66548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen exif_mem_free (mem, content); 67548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen return NULL; 68548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen } 69548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 70548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen content->priv->ref_count = 1; 71548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 72548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen content->priv->mem = mem; 73548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen exif_mem_ref (mem); 74548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 75548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen return content; 76548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen} 77548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 78548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissenvoid 79548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissenexif_content_ref (ExifContent *content) 80548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen{ 81548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen content->priv->ref_count++; 82548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen} 83548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 84548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissenvoid 85548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissenexif_content_unref (ExifContent *content) 86548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen{ 87548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen content->priv->ref_count--; 88548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen if (!content->priv->ref_count) 89548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen exif_content_free (content); 90548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen} 91548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 92548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissenvoid 93548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissenexif_content_free (ExifContent *content) 94548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen{ 95548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen ExifMem *mem = (content && content->priv) ? content->priv->mem : NULL; 96548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen unsigned int i; 97548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 98548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen if (!content) return; 99548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 100548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen for (i = 0; i < content->count; i++) 101548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen exif_entry_unref (content->entries[i]); 102548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen exif_mem_free (mem, content->entries); 103548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 104548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen if (content->priv) { 105548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen exif_log_unref (content->priv->log); 106548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen } 107548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 108548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen exif_mem_free (mem, content->priv); 109548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen exif_mem_free (mem, content); 110548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen exif_mem_unref (mem); 111548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen} 112548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 113548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissenvoid 114548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissenexif_content_dump (ExifContent *content, unsigned int indent) 115548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen{ 116548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen char buf[1024]; 117548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen unsigned int i; 118548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 119548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen for (i = 0; i < 2 * indent; i++) 120548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen buf[i] = ' '; 121548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen buf[i] = '\0'; 122548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 123548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen if (!content) 124548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen return; 125548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 126548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen printf ("%sDumping exif content (%u entries)...\n", buf, 127548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen content->count); 128548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen for (i = 0; i < content->count; i++) 129548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen exif_entry_dump (content->entries[i], indent + 1); 130548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen} 131548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 132548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissenvoid 133548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissenexif_content_add_entry (ExifContent *c, ExifEntry *entry) 134548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen{ 135548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen ExifEntry **entries; 136548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen if (!c || !c->priv || !entry || entry->parent) return; 137548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 138548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen /* One tag can only be added once to an IFD. */ 139548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen if (exif_content_get_entry (c, entry->tag)) { 140548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen exif_log (c->priv->log, EXIF_LOG_CODE_DEBUG, "ExifContent", 141548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen "An attempt has been made to add " 142548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen "the tag '%s' twice to an IFD. This is against " 143548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen "specification.", exif_tag_get_name (entry->tag)); 144548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen return; 145548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen } 146548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 147548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen entries = exif_mem_realloc (c->priv->mem, 148548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen c->entries, sizeof (ExifEntry*) * (c->count + 1)); 149548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen if (!entries) return; 150548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen entry->parent = c; 151548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen entries[c->count++] = entry; 152548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen c->entries = entries; 153548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen exif_entry_ref (entry); 154548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen} 155548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 156548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissenvoid 157548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissenexif_content_remove_entry (ExifContent *c, ExifEntry *e) 158548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen{ 159548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen unsigned int i; 160548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen ExifEntry **t, *temp; 161548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 162548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen if (!c || !c->priv || !e || (e->parent != c)) return; 163548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 164548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen /* Search the entry */ 165548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen for (i = 0; i < c->count; i++) 166548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen if (c->entries[i] == e) 167548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen break; 168548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 169548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen if (i == c->count) 170548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen return; 171548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 172548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen /* Remove the entry */ 173548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen temp = c->entries[c->count-1]; 174548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen if (c->count > 1) { 175548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen t = exif_mem_realloc (c->priv->mem, c->entries, 176548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen sizeof(ExifEntry*) * (c->count - 1)); 177548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen if (!t) { 178548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen return; 179548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen } 180548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen c->entries = t; 181548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen c->count--; 182548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen if (i != c->count) { /* we deallocated the last slot already */ 183548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen memmove (&t[i], &t[i + 1], sizeof (ExifEntry*) * (c->count - i - 1)); 184548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen t[c->count-1] = temp; 185548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen } 186548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen } else { 187548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen exif_mem_free (c->priv->mem, c->entries); 188548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen c->entries = NULL; 189548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen c->count = 0; 190548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen } 191548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen e->parent = NULL; 192548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen exif_entry_unref (e); 193548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen} 194548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 195548dde4863e9a2315e3f327efe63ff55949addb8Marco NelissenExifEntry * 196548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissenexif_content_get_entry (ExifContent *content, ExifTag tag) 197548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen{ 198548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen unsigned int i; 199548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 200548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen if (!content) 201548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen return (NULL); 202548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 203548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen for (i = 0; i < content->count; i++) 204548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen if (content->entries[i]->tag == tag) 205548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen return (content->entries[i]); 206548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen return (NULL); 207548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen} 208548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 209548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissenvoid 210548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissenexif_content_foreach_entry (ExifContent *content, 211548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen ExifContentForeachEntryFunc func, void *data) 212548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen{ 213548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen unsigned int i; 214548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 215548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen if (!content || !func) 216548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen return; 217548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 218548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen for (i = 0; i < content->count; i++) 219548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen func (content->entries[i], data); 220548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen} 221548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 222548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissenvoid 223548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissenexif_content_log (ExifContent *content, ExifLog *log) 224548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen{ 225548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen if (!content || !content->priv || !log || content->priv->log == log) 226548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen return; 227548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 228548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen if (content->priv->log) exif_log_unref (content->priv->log); 229548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen content->priv->log = log; 230548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen exif_log_ref (log); 231548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen} 232548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 233548dde4863e9a2315e3f327efe63ff55949addb8Marco NelissenExifIfd 234548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissenexif_content_get_ifd (ExifContent *c) 235548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen{ 236548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen if (!c || !c->parent) return EXIF_IFD_COUNT; 237548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 238548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen return 239548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen ((c)->parent->ifd[EXIF_IFD_EXIF] == (c)) ? EXIF_IFD_EXIF : 240548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen ((c)->parent->ifd[EXIF_IFD_0] == (c)) ? EXIF_IFD_0 : 241548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen ((c)->parent->ifd[EXIF_IFD_1] == (c)) ? EXIF_IFD_1 : 242548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen ((c)->parent->ifd[EXIF_IFD_GPS] == (c)) ? EXIF_IFD_GPS : 243548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen ((c)->parent->ifd[EXIF_IFD_INTEROPERABILITY] == (c)) ? EXIF_IFD_INTEROPERABILITY : 244548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen EXIF_IFD_COUNT; 245548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen} 246548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 247548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissenstatic void 248548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissenfix_func (ExifEntry *e, void *UNUSED(data)) 249548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen{ 250548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen exif_entry_fix (e); 251548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen} 252548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 253548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen/*! 254548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * Check if this entry is unknown and if so, delete it. 255548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * \note Be careful calling this function in a loop. Deleting an entry from 256548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * an ExifContent changes the index of subsequent entries, as well as the 257548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * total size of the entries array. 258548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen */ 259548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissenstatic void 260548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissenremove_not_recorded (ExifEntry *e, void *UNUSED(data)) 261548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen{ 262548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen ExifIfd ifd = exif_entry_get_ifd(e) ; 263548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen ExifContent *c = e->parent; 264548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen ExifDataType dt = exif_data_get_data_type (c->parent); 265548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen ExifTag t = e->tag; 266548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 267548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen if (exif_tag_get_support_level_in_ifd (t, ifd, dt) == 268548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen EXIF_SUPPORT_LEVEL_NOT_RECORDED) { 269548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen exif_log (c->priv->log, EXIF_LOG_CODE_DEBUG, "exif-content", 270548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen "Tag 0x%04x is not recorded in IFD '%s' and has therefore been " 271548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen "removed.", t, exif_ifd_get_name (ifd)); 272548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen exif_content_remove_entry (c, e); 273548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen } 274548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 275548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen} 276548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 277548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissenvoid 278548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissenexif_content_fix (ExifContent *c) 279548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen{ 280548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen ExifIfd ifd = exif_content_get_ifd (c); 281548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen ExifDataType dt; 282548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen ExifEntry *e; 283548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen unsigned int i, num; 284548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 285548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen if (!c) 286548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen return; 287548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 288548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen dt = exif_data_get_data_type (c->parent); 289548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 290548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen /* 291548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * First of all, fix all existing entries. 292548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen */ 293548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen exif_content_foreach_entry (c, fix_func, NULL); 294548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 295548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen /* 296548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * Go through each tag and if it's not recorded, remove it. If one 297548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * is removed, exif_content_foreach_entry() will skip the next entry, 298548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * so if this happens do the loop again from the beginning to ensure 299548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * they're all checked. This could be avoided if we stop relying on 300548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * exif_content_foreach_entry but loop intelligently here. 301548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen */ 302548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen do { 303548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen num = c->count; 304548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen exif_content_foreach_entry (c, remove_not_recorded, NULL); 305548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen } while (num != c->count); 306548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen 307548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen /* 308548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen * Then check for non-existing mandatory tags and create them if needed 309548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen */ 310548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen num = exif_tag_table_count(); 311548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen for (i = 0; i < num; ++i) { 312548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen const ExifTag t = exif_tag_table_get_tag (i); 313548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen if (exif_tag_get_support_level_in_ifd (t, ifd, dt) == 314548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen EXIF_SUPPORT_LEVEL_MANDATORY) { 315548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen if (exif_content_get_entry (c, t)) 316548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen /* This tag already exists */ 317548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen continue; 318548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen exif_log (c->priv->log, EXIF_LOG_CODE_DEBUG, "exif-content", 319548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen "Tag '%s' is mandatory in IFD '%s' and has therefore been added.", 320548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen exif_tag_get_name_in_ifd (t, ifd), exif_ifd_get_name (ifd)); 321548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen e = exif_entry_new (); 322548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen exif_content_add_entry (c, e); 323548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen exif_entry_initialize (e, t); 324548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen exif_entry_unref (e); 325548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen } 326548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen } 327548dde4863e9a2315e3f327efe63ff55949addb8Marco Nelissen} 328