1/* plugin_common - Routines common to several plugins
2 * Copyright (C) 2002,2003,2004,2005,2006,2007  Josh Coalson
3 * Copyright (C) 2003  Philip J�genstedt
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
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
18 */
19
20#if HAVE_CONFIG_H
21#  include <config.h>
22#endif
23
24#include "replaygain.h"
25#include "FLAC/ordinals.h"
26#include "FLAC/metadata.h"
27#include "share/grabbag.h"
28
29FLAC__bool FLAC_plugin__replaygain_get_from_file(const char *filename,
30                                                 double *reference, FLAC__bool *reference_set,
31                                                 double *track_gain, FLAC__bool *track_gain_set,
32                                                 double *album_gain, FLAC__bool *album_gain_set,
33                                                 double *track_peak, FLAC__bool *track_peak_set,
34                                                 double *album_peak, FLAC__bool *album_peak_set)
35{
36	FLAC__Metadata_SimpleIterator *iterator = FLAC__metadata_simple_iterator_new();
37	FLAC__bool ret = false;
38
39	*track_gain_set = *album_gain_set = *track_peak_set = *album_peak_set = false;
40
41	if(0 != iterator) {
42		if(FLAC__metadata_simple_iterator_init(iterator, filename, /*read_only=*/true, /*preserve_file_stats=*/true)) {
43			FLAC__bool got_vorbis_comments = false;
44			ret = true;
45			do {
46				if(FLAC__metadata_simple_iterator_get_block_type(iterator) == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
47					FLAC__StreamMetadata *block = FLAC__metadata_simple_iterator_get_block(iterator);
48					if(0 != block) {
49						if(grabbag__replaygain_load_from_vorbiscomment(block, /*album_mode=*/false, /*strict=*/true, reference, track_gain, track_peak)) {
50							*reference_set = *track_gain_set = *track_peak_set = true;
51						}
52						if(grabbag__replaygain_load_from_vorbiscomment(block, /*album_mode=*/true, /*strict=*/true, reference, album_gain, album_peak)) {
53							*reference_set = *album_gain_set = *album_peak_set = true;
54						}
55						FLAC__metadata_object_delete(block);
56						got_vorbis_comments = true;
57					}
58				}
59			} while (!got_vorbis_comments && FLAC__metadata_simple_iterator_next(iterator));
60		}
61		FLAC__metadata_simple_iterator_delete(iterator);
62	}
63	return ret;
64}
65