Bulk update copyright dates
[flac.git] / src / metaflac / operations_shorthand_picture.c
1 /* metaflac - Command-line FLAC metadata editor
2  * Copyright (C) 2001-2009  Josh Coalson
3  * Copyright (C) 2011-2016  Xiph.Org Foundation
4  *
5  * This program is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU General Public License
7  * as published by the Free Software Foundation; either version 2
8  * of the License, or (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License along
16  * with this program; if not, write to the Free Software Foundation, Inc.,
17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18  */
19
20 #ifdef HAVE_CONFIG_H
21 #  include <config.h>
22 #endif
23
24 #include <errno.h>
25 #include <string.h>
26 #include "options.h"
27 #include "utils.h"
28 #include "FLAC/assert.h"
29 #include "share/grabbag.h" /* for grabbag__picture_parse_specification() etc */
30
31 #include "operations_shorthand.h"
32
33 static FLAC__bool import_pic_from(const char *filename, FLAC__StreamMetadata **picture, const char *specification, FLAC__bool *needs_write);
34 static FLAC__bool export_pic_to(const char *filename, const FLAC__StreamMetadata *picture, const char *pic_filename);
35
36 FLAC__bool do_shorthand_operation__picture(const char *filename, FLAC__Metadata_Chain *chain, const Operation *operation, FLAC__bool *needs_write)
37 {
38         FLAC__bool ok = true, has_type1 = false, has_type2 = false;
39         FLAC__StreamMetadata *picture = 0;
40         FLAC__Metadata_Iterator *iterator = FLAC__metadata_iterator_new();
41
42         if(0 == iterator)
43                 die("out of memory allocating iterator");
44
45         FLAC__metadata_iterator_init(iterator, chain);
46
47         switch(operation->type) {
48                 case OP__IMPORT_PICTURE_FROM:
49                         ok = import_pic_from(filename, &picture, operation->argument.specification.value, needs_write);
50                         if(ok) {
51                                 /* append PICTURE block */
52                                 while(FLAC__metadata_iterator_next(iterator))
53                                         ;
54                                 if(!FLAC__metadata_iterator_insert_block_after(iterator, picture)) {
55                                         print_error_with_chain_status(chain, "%s: ERROR: adding new PICTURE block to metadata", filename);
56                                         FLAC__metadata_object_delete(picture);
57                                         ok = false;
58                                 }
59                         }
60                         if(ok) {
61                                 /* check global PICTURE constraints (max 1 block each of type=1 and type=2) */
62                                 while(FLAC__metadata_iterator_prev(iterator))
63                                         ;
64                                 do {
65                                         FLAC__StreamMetadata *block = FLAC__metadata_iterator_get_block(iterator);
66                                         if(block->type == FLAC__METADATA_TYPE_PICTURE) {
67                                                 if(block->data.picture.type == FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON_STANDARD) {
68                                                         if(has_type1) {
69                                                                 print_error_with_chain_status(chain, "%s: ERROR: FLAC stream can only have one 32x32 standard icon (type=1) PICTURE block", filename);
70                                                                 ok = false;
71                                                         }
72                                                         has_type1 = true;
73                                                 }
74                                                 else if(block->data.picture.type == FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON) {
75                                                         if(has_type2) {
76                                                                 print_error_with_chain_status(chain, "%s: ERROR: FLAC stream can only have one icon (type=2) PICTURE block", filename);
77                                                                 ok = false;
78                                                         }
79                                                         has_type2 = true;
80                                                 }
81                                         }
82                                 } while(FLAC__metadata_iterator_next(iterator));
83                         }
84                         break;
85                 case OP__EXPORT_PICTURE_TO:
86                         {
87                                 const Argument_BlockNumber *a = operation->argument.export_picture_to.block_number_link;
88                                 int block_number = (a && a->num_entries > 0)? (int)a->entries[0] : -1;
89                                 unsigned i = 0;
90                                 do {
91                                         FLAC__StreamMetadata *block = FLAC__metadata_iterator_get_block(iterator);
92                                         if(block->type == FLAC__METADATA_TYPE_PICTURE && (block_number < 0 || i == (unsigned)block_number))
93                                                 picture = block;
94                                         i++;
95                                 } while(FLAC__metadata_iterator_next(iterator) && 0 == picture);
96                                 if(0 == picture) {
97                                         if(block_number < 0)
98                                                 flac_fprintf(stderr, "%s: ERROR: FLAC file has no PICTURE block\n", filename);
99                                         else
100                                                 flac_fprintf(stderr, "%s: ERROR: FLAC file has no PICTURE block at block #%d\n", filename, block_number);
101                                         ok = false;
102                                 }
103                                 else
104                                         ok = export_pic_to(filename, picture, operation->argument.filename.value);
105                         }
106                         break;
107                 default:
108                         ok = false;
109                         FLAC__ASSERT(0);
110                         break;
111         };
112
113         FLAC__metadata_iterator_delete(iterator);
114         return ok;
115 }
116
117 /*
118  * local routines
119  */
120
121 FLAC__bool import_pic_from(const char *filename, FLAC__StreamMetadata **picture, const char *specification, FLAC__bool *needs_write)
122 {
123         const char *error_message;
124
125         if(0 == specification || strlen(specification) == 0) {
126                 flac_fprintf(stderr, "%s: ERROR: empty picture specification\n", filename);
127                 return false;
128         }
129
130         *picture = grabbag__picture_parse_specification(specification, &error_message);
131
132         if(0 == *picture) {
133                 flac_fprintf(stderr, "%s: ERROR: while parsing picture specification \"%s\": %s\n", filename, specification, error_message);
134                 return false;
135         }
136
137         if(!FLAC__format_picture_is_legal(&(*picture)->data.picture, &error_message)) {
138                 flac_fprintf(stderr, "%s: ERROR: new PICTURE block for \"%s\" is illegal: %s\n", filename, specification, error_message);
139                 return false;
140         }
141
142         *needs_write = true;
143         return true;
144 }
145
146 FLAC__bool export_pic_to(const char *filename, const FLAC__StreamMetadata *picture, const char *pic_filename)
147 {
148         FILE *f;
149         const FLAC__uint32 len = picture->data.picture.data_length;
150
151         if(0 == pic_filename || strlen(pic_filename) == 0) {
152                 flac_fprintf(stderr, "%s: ERROR: empty export file name\n", filename);
153                 return false;
154         }
155         if(0 == strcmp(pic_filename, "-"))
156                 f = grabbag__file_get_binary_stdout();
157         else
158                 f = flac_fopen(pic_filename, "wb");
159
160         if(0 == f) {
161                 flac_fprintf(stderr, "%s: ERROR: can't open export file %s: %s\n", filename, pic_filename, strerror(errno));
162                 return false;
163         }
164
165         if(fwrite(picture->data.picture.data, 1, len, f) != len) {
166                 flac_fprintf(stderr, "%s: ERROR: writing PICTURE data to file\n", filename);
167                 if(f != stdout)
168                         fclose(f);
169                 return false;
170         }
171
172         if(f != stdout)
173                 fclose(f);
174
175         return true;
176 }