2 * This file is part of DisOrder.
3 * Copyright (C) 2018 Mark Wooding
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
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.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 /** @file plugins/tracklength-gstreamer.c
19 * @brief Plugin to compute track lengths using GStreamer
21 #include "tracklength.h"
23 /* Ugh. It turns out that libxml tries to define a function called
24 * `attribute', and it's included by GStreamer for some unimaginable reason.
25 * So undefine it here. We'll want GCC attributes for special effects, but
26 * can take care of ourselves.
32 #include <gst/pbutils/gstdiscoverer.h>
34 /* The only application we have for `attribute' is declaring function
35 * arguments as being unused, because we have a lot of callback functions
36 * which are meant to comply with an externally defined interface.
39 # define UNUSED __attribute__((unused))
42 #define END ((void *)0)
44 static GstDiscoverer *disco = 0;
46 long disorder_tracklength(const char UNUSED *track, const char *path) {
48 gchar *dir = 0, *abs = 0, *uri = 0;
49 GstDiscovererInfo *info = 0;
57 disco = gst_discoverer_new(5*GST_SECOND, &err); if(!disco) goto end;
60 if (g_path_is_absolute(path))
61 uri = g_filename_to_uri(path, 0, &err);
63 dir = g_get_current_dir();
64 abs = g_build_filename(dir, path, END);
65 uri = g_filename_to_uri(abs, 0, &err);
69 info = gst_discoverer_discover_uri(disco, uri, &err); if(!info) goto end;
70 switch(gst_discoverer_info_get_result(info)) {
71 case GST_DISCOVERER_OK:
72 t = gst_discoverer_info_get_duration(info);
73 length = (t + GST_SECOND/2)/GST_SECOND;
75 case GST_DISCOVERER_TIMEOUT:
76 disorder_info("discovery timed out probing `%s'", path);
78 case GST_DISCOVERER_MISSING_PLUGINS:
79 disorder_info("unrecognized file `%s' (missing plugins?)", path);
82 if(err) { g_error_free(err); err = 0; }
91 disorder_error(0, "error probing `%s': %s", path, err->message);
94 if(info) gst_discoverer_info_unref(info);
95 g_free(dir); g_free(abs); g_free(uri);
100 int main(int argc, char *argv[]) {
103 for(i = 1; i < argc; i++)
104 printf("%s: %ld\n", argv[i], disorder_tracklength(0, argv[i]));