aboutsummaryrefslogtreecommitdiffstats
path: root/src/tag_file.c
blob: 8d8a0f5fb5cf4f2e728418441525aa19666927f2 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
/*
 * Copyright (C) 2003-2012 The Music Player Daemon Project
 * http://www.musicpd.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 2 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, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "config.h"
#include "tag_file.h"
#include "uri.h"
#include "decoder_list.h"
#include "decoder_plugin.h"
#include "input_stream.h"

#include <assert.h>
#include <unistd.h> /* for SEEK_SET */

bool
tag_file_scan(const char *path_fs,
	      const struct tag_handler *handler, void *handler_ctx)
{
	assert(path_fs != NULL);
	assert(handler != NULL);

	/* check if there's a suffix and a plugin */

	const char *suffix = uri_get_suffix(path_fs);
	if (suffix == NULL)
		return false;

	const struct decoder_plugin *plugin =
		decoder_plugin_from_suffix(suffix, NULL);
	if (plugin == NULL)
		return false;

	struct input_stream *is = NULL;
	GMutex *mutex = NULL;
	GCond *cond = NULL;

	do {
		/* load file tag */
		if (decoder_plugin_scan_file(plugin, path_fs,
					     handler, handler_ctx))
			break;

		/* fall back to stream tag */
		if (plugin->scan_stream != NULL) {
			/* open the input_stream (if not already
			   open) */
			if (is == NULL) {
				mutex = g_mutex_new();
				cond = g_cond_new();
				is = input_stream_open(path_fs, mutex, cond,
						       NULL);
			}

			/* now try the stream_tag() method */
			if (is != NULL) {
				if (decoder_plugin_scan_stream(plugin, is,
							       handler,
							       handler_ctx))
					break;

				input_stream_lock_seek(is, 0, SEEK_SET, NULL);
			}
		}

		plugin = decoder_plugin_from_suffix(suffix, plugin);
	} while (plugin != NULL);

	if (is != NULL) {
		input_stream_close(is);
		g_cond_free(cond);
		g_mutex_free(mutex);
	}

	return plugin != NULL;
}