1 /* metaflac - Command-line FLAC metadata editor
2 * Copyright (C) 2001,2002,2003,2004,2005,2006 Josh Coalson
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
27 #include "FLAC/assert.h"
28 #include "share/grabbag.h" /* for grabbag__picture_parse_specification() etc */
30 static FLAC__bool import_pic_from(const char *filename, FLAC__StreamMetadata **picture, const char *specification, FLAC__bool *needs_write);
31 static FLAC__bool export_pic_to(const char *filename, const FLAC__StreamMetadata *picture, const char *pic_filename);
33 FLAC__bool do_shorthand_operation__picture(const char *filename, FLAC__Metadata_Chain *chain, const Operation *operation, FLAC__bool *needs_write)
35 FLAC__bool ok = true, has_type1 = false, has_type2 = false;
36 FLAC__StreamMetadata *picture = 0;
37 FLAC__Metadata_Iterator *iterator = FLAC__metadata_iterator_new();
40 die("out of memory allocating iterator");
42 FLAC__metadata_iterator_init(iterator, chain);
44 switch(operation->type) {
45 case OP__IMPORT_PICTURE_FROM:
46 ok = import_pic_from(filename, &picture, operation->argument.specification.value, needs_write);
48 /* append PICTURE block */
49 while(FLAC__metadata_iterator_next(iterator))
51 if(!FLAC__metadata_iterator_insert_block_after(iterator, picture)) {
52 print_error_with_chain_status(chain, "%s: ERROR: adding new PICTURE block to metadata", filename);
53 FLAC__metadata_object_delete(picture);
58 /* check global PICTURE constraints (max 1 block each of type=1 and type=2) */
59 while(FLAC__metadata_iterator_prev(iterator))
62 FLAC__StreamMetadata *block = FLAC__metadata_iterator_get_block(iterator);
63 if(block->type == FLAC__METADATA_TYPE_PICTURE) {
64 if(block->data.picture.type == FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON_STANDARD) {
66 print_error_with_chain_status(chain, "%s: ERROR: FLAC stream can only have one 32x32 standard icon (type=1) PICTURE block", filename);
71 else if(block->data.picture.type == FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON) {
73 print_error_with_chain_status(chain, "%s: ERROR: FLAC stream can only have one icon (type=2) PICTURE block", filename);
79 } while(FLAC__metadata_iterator_next(iterator));
82 case OP__EXPORT_PICTURE_TO:
84 const Argument_BlockNumber *a = operation->argument.export_picture_to.block_number_link;
85 int block_number = (a && a->num_entries > 0)? (int)a->entries[0] : -1;
88 FLAC__StreamMetadata *block = FLAC__metadata_iterator_get_block(iterator);
89 if(block->type == FLAC__METADATA_TYPE_PICTURE && (block_number < 0 || i == (unsigned)block_number))
92 } while(FLAC__metadata_iterator_next(iterator) && 0 == picture);
95 fprintf(stderr, "%s: ERROR: FLAC file has no PICTURE block\n", filename);
97 fprintf(stderr, "%s: ERROR: FLAC file has no PICTURE block at block #%d\n", filename, block_number);
101 ok = export_pic_to(filename, picture, operation->argument.filename.value);
110 FLAC__metadata_iterator_delete(iterator);
118 FLAC__bool import_pic_from(const char *filename, FLAC__StreamMetadata **picture, const char *specification, FLAC__bool *needs_write)
120 const char *error_message;
122 if(0 == specification || strlen(specification) == 0) {
123 fprintf(stderr, "%s: ERROR: empty picture specification\n", filename);
127 *picture = grabbag__picture_parse_specification(specification, &error_message);
130 fprintf(stderr, "%s: ERROR: while parsing picture specification \"%s\": %s\n", filename, specification, error_message);
134 if(!FLAC__format_picture_is_legal(&(*picture)->data.picture, &error_message)) {
135 fprintf(stderr, "%s: ERROR: new PICTURE block for \"%s\" is illegal: %s\n", filename, specification, error_message);
143 FLAC__bool export_pic_to(const char *filename, const FLAC__StreamMetadata *picture, const char *pic_filename)
146 const FLAC__uint32 len = picture->data.picture.data_length;
148 if(0 == pic_filename || strlen(pic_filename) == 0) {
149 fprintf(stderr, "%s: ERROR: empty export file name\n", filename);
152 if(0 == strcmp(pic_filename, "-"))
153 f = grabbag__file_get_binary_stdout();
155 f = fopen(pic_filename, "wb");
158 fprintf(stderr, "%s: ERROR: can't open export file %s: %s\n", filename, pic_filename, strerror(errno));
162 if(fwrite(picture->data.picture.data, 1, len, f) != len) {
163 fprintf(stderr, "%s: ERROR: writing PICTURE data to file\n", filename);