1 /* Copyright Rafaël Carré (licence WTFPL) */
2 /* A video thumbnailer compatible with nautilus */
3 /* Copyright © 2007-2011 Rafaël Carré <funman@videolanorg> */
5 /* Works with : libvlc 1.2.0
6 gcc -pedantic -Wall -Werror -Wextra `pkg-config --cflags --libs libvlc` -lpthread
8 # to register the thumbnailer:
9 list=`grep ^Mime vlc.desktop|cut -d= -f2-|sed -e s/";"/\\\n/g -e s,/,@,g`
10 vid=`echo $mimes|grep ^vid`
13 key=/desktop/gnome/thumbnailers/$i/enable
14 gconftool-2 -t boolean -s $key true
15 gconftool-2 -t string -s $key "vlc-thumb -s %s %u %o"
29 #if !defined (_POSIX_CLOCK_SELECTION)
30 # define _POSIX_CLOCK_SELECTION (-1)
33 #if (_POSIX_CLOCK_SELECTION < 0)
34 # error Clock selection is not available!
39 /* position at which the snapshot is taken */
40 #define VLC_THUMBNAIL_POSITION (30./100.)
42 static void usage(const char *name, int ret)
44 fprintf(stderr, "Usage: %s [-s width] <video> <output.png>\n", name);
48 /* extracts options from command line */
49 static void cmdline(int argc, const char **argv, const char **in,
50 char **out, char **out_with_ext, int *w)
55 if (argc != 3 && argc != 5)
56 usage(argv[0], argc != 2 || strcmp(argv[1], "-h"));
61 if (strcmp(argv[1], "-s"))
64 idx += 2; /* skip "-s width" */
69 *out = strdup(argv[idx++]);
74 if (len >= 4 && !strcmp(*out + len - 4, ".png")) {
79 /* We need to add .png extension to filename,
80 * VLC relies on it to detect output format,
81 * and nautilus doesn't give filenames ending in .png */
83 *out_with_ext = malloc(len + sizeof ".png");
86 strcpy(*out_with_ext, *out);
87 strcat(*out_with_ext, ".png");
90 static libvlc_instance_t *create_libvlc(void)
92 static const char* const args[] = {
93 "--intf", "dummy", /* no interface */
94 "--vout", "dummy", /* we don't want video (output) */
95 "--no-audio", /* we don't want audio (decoding) */
96 "--no-video-title-show", /* nor the filename displayed */
97 "--no-stats", /* no stats */
98 "--no-sub-autodetect-file", /* we don't want subtitles */
99 "--no-inhibit", /* we don't want interfaces */
100 "--no-disable-screensaver", /* we don't want interfaces */
101 "--no-snapshot-preview", /* no blending in dummy vout */
103 "--verbose=2", /* full log */
107 return libvlc_new(sizeof args / sizeof *args, args);
110 static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
111 static pthread_cond_t wait;
114 static void callback(const libvlc_event_t *ev, void *param)
119 pthread_mutex_lock(&lock);
121 case libvlc_MediaPlayerPositionChanged:
122 new_position = ev->u.media_player_position_changed.new_position;
123 if (new_position < VLC_THUMBNAIL_POSITION * .9 /* 90% margin */)
125 case libvlc_MediaPlayerSnapshotTaken:
127 pthread_cond_signal(&wait);
133 pthread_mutex_unlock(&lock);
136 static void event_wait(const char *error)
140 #define VLC_THUMBNAIL_TIMEOUT 5.0 /* 5 secs */
142 clock_gettime(CLOCK_MONOTONIC, &ts);
143 ts.tv_sec += VLC_THUMBNAIL_TIMEOUT;
144 pthread_mutex_lock(&lock);
145 ret = done ? 0 : pthread_cond_timedwait(&wait, &lock, &ts);
146 pthread_mutex_unlock(&lock);
148 assert(!ret || ret == ETIMEDOUT);
152 "%s (timeout after %.2f secs!\n", error, VLC_THUMBNAIL_TIMEOUT);
157 static void set_position(libvlc_media_player_t *mp)
159 libvlc_event_manager_t *em = libvlc_media_player_event_manager(mp);
162 libvlc_event_attach(em, libvlc_MediaPlayerPositionChanged, callback, NULL);
164 libvlc_media_player_set_position(mp, VLC_THUMBNAIL_POSITION);
165 event_wait("Couldn't set position");
166 libvlc_event_detach(em, libvlc_MediaPlayerPositionChanged, callback, NULL);
169 static void snapshot(libvlc_media_player_t *mp, int width, char *out_with_ext)
171 libvlc_event_manager_t *em = libvlc_media_player_event_manager(mp);
174 libvlc_event_attach(em, libvlc_MediaPlayerSnapshotTaken, callback, NULL);
176 libvlc_video_take_snapshot(mp, 0, out_with_ext, width, 0);
177 event_wait("Snapshot has not been written");
178 libvlc_event_detach(em, libvlc_MediaPlayerSnapshotTaken, callback, NULL);
181 int main(int argc, const char **argv)
184 char *out, *out_with_ext;
186 pthread_condattr_t attr;
187 libvlc_instance_t *libvlc;
188 libvlc_media_player_t *mp;
191 /* mandatory to support UTF-8 filenames (provided the locale is well set)*/
192 setlocale(LC_ALL, "");
194 cmdline(argc, argv, &in, &out, &out_with_ext, &width);
196 pthread_condattr_init(&attr);
197 pthread_condattr_setclock(&attr, CLOCK_MONOTONIC);
198 pthread_cond_init(&wait, &attr);
199 pthread_condattr_destroy(&attr);
202 libvlc = create_libvlc();
205 m = libvlc_media_new_path(libvlc, in);
208 mp = libvlc_media_player_new_from_media(m);
211 libvlc_media_player_play(mp);
215 snapshot(mp, width, out_with_ext);
217 libvlc_media_player_stop(mp);
220 if (out != out_with_ext) {
221 rename(out_with_ext, out);
226 libvlc_media_player_release(mp);
227 libvlc_media_release(m);
228 libvlc_release(libvlc);
230 pthread_cond_destroy(&wait);