2 * Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
3 * 2009 Nokia Corporation
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library 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 GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 * Boston, MA 02111-1307, USA.
22 * SECTION:gstdiscoverer
23 * @short_description: Utility for discovering information on URIs.
25 * The #GstDiscoverer is a utility object which allows to get as much
26 * information as possible from one or many URIs.
28 * It provides two APIs, allowing usage in blocking or non-blocking mode.
30 * The blocking mode just requires calling gst_discoverer_discover_uri()
31 * with the URI one wishes to discover.
33 * The non-blocking mode requires a running #GMainLoop in the default
34 * #GMainContext, where one connects to the various signals, appends the
35 * URIs to be processed (through gst_discoverer_discover_uri_async()) and then
36 * asks for the discovery to begin (through gst_discoverer_start()).
38 * All the information is returned in a #GstDiscovererInfo structure.
47 #include <gst/video/video.h>
50 #include "pbutils-marshal.h"
51 #include "pbutils-private.h"
53 #include "gst/glib-compat-private.h"
55 GST_DEBUG_CATEGORY_STATIC (discoverer_debug);
56 #define GST_CAT_DEFAULT discoverer_debug
58 static GQuark _CAPS_QUARK;
59 static GQuark _TAGS_QUARK;
60 static GQuark _MISSING_PLUGIN_QUARK;
61 static GQuark _STREAM_TOPOLOGY_QUARK;
62 static GQuark _TOPOLOGY_PAD_QUARK;
74 struct _GstDiscovererPrivate
78 /* allowed time to discover each uri in nanoseconds */
81 /* list of pending URI to process (current excluded) */
86 /* TRUE if processing a URI */
89 /* TRUE if discoverer has been started */
92 /* TRUE if ASYNC_DONE has been received (need to check for subtitle tags) */
96 GstDiscovererInfo *current_info;
97 GError *current_error;
98 GstStructure *current_topology;
100 /* List of private streams */
103 /* List of these sinks and their handler IDs (to remove the probe) */
104 guint pending_subtitle_pads;
106 /* Global elements */
108 GstElement *uridecodebin;
111 GType decodebin_type;
113 /* Custom main context variables */
118 /* reusable queries */
119 GstQuery *seeking_query;
121 /* Handler ids for various callbacks */
123 gulong pad_remove_id;
124 gulong element_added_id;
128 #define DISCO_LOCK(dc) g_mutex_lock (dc->priv->lock);
129 #define DISCO_UNLOCK(dc) g_mutex_unlock (dc->priv->lock);
134 GST_DEBUG_CATEGORY_INIT (discoverer_debug, "discoverer", 0, "Discoverer");
136 _CAPS_QUARK = g_quark_from_static_string ("caps");
137 _TAGS_QUARK = g_quark_from_static_string ("tags");
138 _MISSING_PLUGIN_QUARK = g_quark_from_static_string ("missing-plugin");
139 _STREAM_TOPOLOGY_QUARK = g_quark_from_static_string ("stream-topology");
140 _TOPOLOGY_PAD_QUARK = g_quark_from_static_string ("pad");
143 G_DEFINE_TYPE_EXTENDED (GstDiscoverer, gst_discoverer, G_TYPE_OBJECT, 0,
154 #define DEFAULT_PROP_TIMEOUT 15 * GST_SECOND
162 static guint gst_discoverer_signals[LAST_SIGNAL] = { 0 };
164 static void gst_discoverer_set_timeout (GstDiscoverer * dc,
165 GstClockTime timeout);
166 static gboolean async_timeout_cb (GstDiscoverer * dc);
168 static void discoverer_bus_cb (GstBus * bus, GstMessage * msg,
170 static void uridecodebin_pad_added_cb (GstElement * uridecodebin, GstPad * pad,
172 static void uridecodebin_pad_removed_cb (GstElement * uridecodebin,
173 GstPad * pad, GstDiscoverer * dc);
175 static void gst_discoverer_dispose (GObject * dc);
176 static void gst_discoverer_set_property (GObject * object, guint prop_id,
177 const GValue * value, GParamSpec * pspec);
178 static void gst_discoverer_get_property (GObject * object, guint prop_id,
179 GValue * value, GParamSpec * pspec);
182 gst_discoverer_class_init (GstDiscovererClass * klass)
184 GObjectClass *gobject_class = (GObjectClass *) klass;
186 gobject_class->dispose = gst_discoverer_dispose;
188 gobject_class->set_property = gst_discoverer_set_property;
189 gobject_class->get_property = gst_discoverer_get_property;
191 g_type_class_add_private (klass, sizeof (GstDiscovererPrivate));
195 * GstDiscoverer:timeout
197 * The duration (in nanoseconds) after which the discovery of an individual
200 * If the discovery of a URI times out, the %GST_DISCOVERER_TIMEOUT will be
201 * set on the result flags.
203 g_object_class_install_property (gobject_class, PROP_TIMEOUT,
204 g_param_spec_uint64 ("timeout", "timeout", "Timeout",
205 GST_SECOND, 3600 * GST_SECOND, DEFAULT_PROP_TIMEOUT,
206 G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS));
210 * GstDiscoverer::finished:
211 * @discoverer: the #GstDiscoverer
213 * Will be emitted when all pending URIs have been processed.
215 gst_discoverer_signals[SIGNAL_FINISHED] =
216 g_signal_new ("finished", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
217 G_STRUCT_OFFSET (GstDiscovererClass, finished),
218 NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0, G_TYPE_NONE);
221 * GstDiscoverer::starting:
222 * @discoverer: the #GstDiscoverer
224 * Will be emitted when the discover starts analyzing the pending URIs
226 gst_discoverer_signals[SIGNAL_STARTING] =
227 g_signal_new ("starting", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
228 G_STRUCT_OFFSET (GstDiscovererClass, starting),
229 NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0, G_TYPE_NONE);
232 * GstDiscoverer::discovered:
233 * @discoverer: the #GstDiscoverer
234 * @info: the results #GstDiscovererInfo
235 * @error: (type GLib.Error): #GError, which will be non-NULL if an error
236 * occurred during discovery
238 * Will be emitted when all information on a URI could be discovered.
240 gst_discoverer_signals[SIGNAL_DISCOVERED] =
241 g_signal_new ("discovered", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
242 G_STRUCT_OFFSET (GstDiscovererClass, discovered),
243 NULL, NULL, pbutils_marshal_VOID__POINTER_BOXED,
244 G_TYPE_NONE, 2, GST_TYPE_DISCOVERER_INFO,
245 G_TYPE_ERROR | G_SIGNAL_TYPE_STATIC_SCOPE);
249 uridecodebin_element_added_cb (GstElement * uridecodebin,
250 GstElement * child, GstDiscoverer * dc)
252 GST_DEBUG ("New element added to uridecodebin : %s",
253 GST_ELEMENT_NAME (child));
255 if (G_OBJECT_TYPE (child) == dc->priv->decodebin_type) {
256 g_object_set (child, "post-stream-topology", TRUE, NULL);
261 gst_discoverer_init (GstDiscoverer * dc)
264 GstFormat format = GST_FORMAT_TIME;
266 dc->priv = G_TYPE_INSTANCE_GET_PRIVATE (dc, GST_TYPE_DISCOVERER,
267 GstDiscovererPrivate);
269 dc->priv->timeout = DEFAULT_PROP_TIMEOUT;
270 dc->priv->async = FALSE;
271 dc->priv->async_done = FALSE;
273 dc->priv->lock = g_mutex_new ();
275 dc->priv->pending_subtitle_pads = 0;
277 GST_LOG ("Creating pipeline");
278 dc->priv->pipeline = (GstBin *) gst_pipeline_new ("Discoverer");
279 GST_LOG_OBJECT (dc, "Creating uridecodebin");
280 dc->priv->uridecodebin =
281 gst_element_factory_make ("uridecodebin", "discoverer-uri");
282 if (G_UNLIKELY (dc->priv->uridecodebin == NULL)) {
283 GST_ERROR ("Can't create uridecodebin");
286 GST_LOG_OBJECT (dc, "Adding uridecodebin to pipeline");
287 gst_bin_add (dc->priv->pipeline, dc->priv->uridecodebin);
289 dc->priv->pad_added_id =
290 g_signal_connect_object (dc->priv->uridecodebin, "pad-added",
291 G_CALLBACK (uridecodebin_pad_added_cb), dc, 0);
292 dc->priv->pad_remove_id =
293 g_signal_connect_object (dc->priv->uridecodebin, "pad-removed",
294 G_CALLBACK (uridecodebin_pad_removed_cb), dc, 0);
296 GST_LOG_OBJECT (dc, "Getting pipeline bus");
297 dc->priv->bus = gst_pipeline_get_bus ((GstPipeline *) dc->priv->pipeline);
299 dc->priv->bus_cb_id =
300 g_signal_connect_object (dc->priv->bus, "message",
301 G_CALLBACK (discoverer_bus_cb), dc, 0);
303 GST_DEBUG_OBJECT (dc, "Done initializing Discoverer");
305 /* This is ugly. We get the GType of decodebin so we can quickly detect
306 * when a decodebin is added to uridecodebin so we can set the
307 * post-stream-topology setting to TRUE */
308 dc->priv->element_added_id =
309 g_signal_connect_object (dc->priv->uridecodebin, "element-added",
310 G_CALLBACK (uridecodebin_element_added_cb), dc, 0);
311 tmp = gst_element_factory_make ("decodebin", NULL);
312 dc->priv->decodebin_type = G_OBJECT_TYPE (tmp);
313 gst_object_unref (tmp);
316 dc->priv->seeking_query = gst_query_new_seeking (format);
320 discoverer_reset (GstDiscoverer * dc)
322 GST_DEBUG_OBJECT (dc, "Resetting");
324 if (dc->priv->pending_uris) {
325 g_list_foreach (dc->priv->pending_uris, (GFunc) g_free, NULL);
326 g_list_free (dc->priv->pending_uris);
327 dc->priv->pending_uris = NULL;
330 if (dc->priv->pipeline)
331 gst_element_set_state ((GstElement *) dc->priv->pipeline, GST_STATE_NULL);
334 #define DISCONNECT_SIGNAL(o,i) G_STMT_START{ \
335 if ((i) && g_signal_handler_is_connected ((o), (i))) \
336 g_signal_handler_disconnect ((o), (i)); \
341 gst_discoverer_dispose (GObject * obj)
343 GstDiscoverer *dc = (GstDiscoverer *) obj;
345 GST_DEBUG_OBJECT (dc, "Disposing");
347 discoverer_reset (dc);
349 if (G_LIKELY (dc->priv->pipeline)) {
350 /* Workaround for bug #118536 */
351 DISCONNECT_SIGNAL (dc->priv->uridecodebin, dc->priv->pad_added_id);
352 DISCONNECT_SIGNAL (dc->priv->uridecodebin, dc->priv->pad_remove_id);
353 DISCONNECT_SIGNAL (dc->priv->uridecodebin, dc->priv->element_added_id);
354 DISCONNECT_SIGNAL (dc->priv->bus, dc->priv->bus_cb_id);
356 /* pipeline was set to NULL in _reset */
357 gst_object_unref (dc->priv->pipeline);
358 gst_object_unref (dc->priv->bus);
360 dc->priv->pipeline = NULL;
361 dc->priv->uridecodebin = NULL;
362 dc->priv->bus = NULL;
365 gst_discoverer_stop (dc);
367 if (dc->priv->lock) {
368 g_mutex_free (dc->priv->lock);
369 dc->priv->lock = NULL;
372 if (dc->priv->seeking_query) {
373 gst_query_unref (dc->priv->seeking_query);
374 dc->priv->seeking_query = NULL;
377 G_OBJECT_CLASS (gst_discoverer_parent_class)->dispose (obj);
381 gst_discoverer_set_property (GObject * object, guint prop_id,
382 const GValue * value, GParamSpec * pspec)
384 GstDiscoverer *dc = (GstDiscoverer *) object;
388 gst_discoverer_set_timeout (dc, g_value_get_uint64 (value));
391 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
397 gst_discoverer_get_property (GObject * object, guint prop_id,
398 GValue * value, GParamSpec * pspec)
400 GstDiscoverer *dc = (GstDiscoverer *) object;
405 g_value_set_uint64 (value, dc->priv->timeout);
409 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
415 gst_discoverer_set_timeout (GstDiscoverer * dc, GstClockTime timeout)
417 GST_DEBUG_OBJECT (dc, "timeout : %" GST_TIME_FORMAT, GST_TIME_ARGS (timeout));
419 /* FIXME : update current pending timeout if we're running */
421 dc->priv->timeout = timeout;
425 static GstPadProbeReturn
426 _event_probe (GstPad * pad, GstPadProbeInfo * info, PrivateStream * ps)
428 GstEvent *event = GST_PAD_PROBE_INFO_EVENT (info);
430 if (GST_EVENT_TYPE (event) == GST_EVENT_TAG) {
431 GstTagList *tl = NULL, *tmp;
433 gst_event_parse_tag (event, &tl);
434 GST_DEBUG_OBJECT (pad, "tags %" GST_PTR_FORMAT, tl);
436 /* If preroll is complete, drop these tags - the collected information is
437 * possibly already being processed and adding more tags would be racy */
438 if (G_LIKELY (ps->dc->priv->processing)) {
439 GST_DEBUG_OBJECT (pad, "private stream %p old tags %" GST_PTR_FORMAT, ps,
441 tmp = gst_tag_list_merge (ps->tags, tl, GST_TAG_MERGE_APPEND);
443 gst_tag_list_free (ps->tags);
445 GST_DEBUG_OBJECT (pad, "private stream %p new tags %" GST_PTR_FORMAT, ps,
448 GST_DEBUG_OBJECT (pad, "Dropping tags since preroll is done");
449 DISCO_UNLOCK (ps->dc);
452 return GST_PAD_PROBE_OK;
455 static GstStaticCaps subtitle_caps = GST_STATIC_CAPS ("text/plain; "
456 "text/x-pango-markup; subpicture/x-pgs; subpicture/x-dvb; "
457 "application/x-subtitle-unknown; application/x-ssa; application/x-ass; "
458 "subtitle/x-kate; application/x-kate; video/x-dvd-subpicture");
461 is_subtitle_caps (const GstCaps * caps)
466 subs_caps = gst_static_caps_get (&subtitle_caps);
467 ret = gst_caps_can_intersect (caps, subs_caps);
468 gst_caps_unref (subs_caps);
473 static GstPadProbeReturn
474 got_subtitle_data (GstPad * pad, GstPadProbeInfo * info, GstDiscoverer * dc)
477 if (!(GST_IS_BUFFER (info->data) || (GST_IS_EVENT (info->data)
478 && GST_EVENT_TYPE ((GstEvent *) info->data) == GST_EVENT_GAP)))
479 return GST_PAD_PROBE_OK;
484 dc->priv->pending_subtitle_pads--;
486 if (dc->priv->pending_subtitle_pads == 0) {
487 GstMessage *msg = gst_message_new_application (NULL,
488 gst_structure_new_empty ("DiscovererDone"));
489 gst_element_post_message ((GstElement *) dc->priv->pipeline, msg);
493 return GST_PAD_PROBE_REMOVE;
498 uridecodebin_pad_added_cb (GstElement * uridecodebin, GstPad * pad,
502 GstPad *sinkpad = NULL;
505 GST_DEBUG_OBJECT (dc, "pad %s:%s", GST_DEBUG_PAD_NAME (pad));
507 ps = g_slice_new0 (PrivateStream);
511 ps->queue = gst_element_factory_make ("queue", NULL);
512 ps->sink = gst_element_factory_make ("fakesink", NULL);
514 if (G_UNLIKELY (ps->queue == NULL || ps->sink == NULL))
517 g_object_set (ps->sink, "silent", TRUE, NULL);
518 g_object_set (ps->queue, "max-size-buffers", 1, "silent", TRUE, NULL);
520 caps = gst_pad_query_caps (pad, NULL);
522 sinkpad = gst_element_get_static_pad (ps->queue, "sink");
526 if (is_subtitle_caps (caps)) {
527 /* Subtitle streams are sparse and may not provide any information - don't
528 * wait for data to preroll */
529 gst_pad_add_probe (sinkpad, GST_PAD_PROBE_TYPE_DATA_DOWNSTREAM,
530 (GstPadProbeCallback) got_subtitle_data, dc, NULL);
531 g_object_set (ps->sink, "async", FALSE, NULL);
533 dc->priv->pending_subtitle_pads++;
537 gst_caps_unref (caps);
539 gst_bin_add_many (dc->priv->pipeline, ps->queue, ps->sink, NULL);
541 if (!gst_element_link_pads_full (ps->queue, "src", ps->sink, "sink",
542 GST_PAD_LINK_CHECK_NOTHING))
544 if (!gst_element_sync_state_with_parent (ps->sink))
546 if (!gst_element_sync_state_with_parent (ps->queue))
549 if (gst_pad_link_full (pad, sinkpad,
550 GST_PAD_LINK_CHECK_NOTHING) != GST_PAD_LINK_OK)
552 gst_object_unref (sinkpad);
554 /* Add an event probe */
555 gst_pad_add_probe (pad, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM,
556 (GstPadProbeCallback) _event_probe, ps, NULL);
559 dc->priv->streams = g_list_append (dc->priv->streams, ps);
562 GST_DEBUG_OBJECT (dc, "Done handling pad");
567 GST_ERROR_OBJECT (dc, "Error while handling pad");
569 gst_object_unref (sinkpad);
571 gst_object_unref (ps->queue);
573 gst_object_unref (ps->sink);
574 g_slice_free (PrivateStream, ps);
579 uridecodebin_pad_removed_cb (GstElement * uridecodebin, GstPad * pad,
586 GST_DEBUG_OBJECT (dc, "pad %s:%s", GST_DEBUG_PAD_NAME (pad));
588 /* Find the PrivateStream */
590 for (tmp = dc->priv->streams; tmp; tmp = tmp->next) {
591 ps = (PrivateStream *) tmp->data;
598 GST_DEBUG ("The removed pad wasn't controlled by us !");
602 dc->priv->streams = g_list_delete_link (dc->priv->streams, tmp);
605 gst_element_set_state (ps->sink, GST_STATE_NULL);
606 gst_element_set_state (ps->queue, GST_STATE_NULL);
607 gst_element_unlink (ps->queue, ps->sink);
609 sinkpad = gst_element_get_static_pad (ps->queue, "sink");
610 gst_pad_unlink (pad, sinkpad);
611 gst_object_unref (sinkpad);
613 /* references removed here */
614 gst_bin_remove_many (dc->priv->pipeline, ps->sink, ps->queue, NULL);
617 gst_tag_list_free (ps->tags);
620 g_slice_free (PrivateStream, ps);
622 GST_DEBUG ("Done handling pad");
625 static GstStructure *
626 collect_stream_information (GstDiscoverer * dc, PrivateStream * ps, guint idx)
632 stname = g_strdup_printf ("stream-%02d", idx);
633 st = gst_structure_new_empty (stname);
637 caps = gst_pad_get_current_caps (ps->pad);
639 GST_WARNING ("Couldn't get negotiated caps from %s:%s",
640 GST_DEBUG_PAD_NAME (ps->pad));
641 caps = gst_pad_query_caps (ps->pad, NULL);
644 GST_DEBUG ("Got caps %" GST_PTR_FORMAT, caps);
645 gst_structure_id_set (st, _CAPS_QUARK, GST_TYPE_CAPS, caps, NULL);
647 gst_caps_unref (caps);
650 gst_structure_id_set (st, _TAGS_QUARK, GST_TYPE_TAG_LIST, ps->tags, NULL);
655 /* takes ownership of new_tags, may replace *taglist with a new one */
657 gst_discoverer_merge_and_replace_tags (GstTagList ** taglist,
658 GstTagList * new_tags)
660 if (new_tags == NULL)
663 if (*taglist == NULL) {
668 gst_tag_list_insert (*taglist, new_tags, GST_TAG_MERGE_REPLACE);
669 gst_tag_list_free (new_tags);
672 /* Parses a set of caps and tags in st and populates a GstDiscovererStreamInfo
673 * structure (parent, if !NULL, otherwise it allocates one)
675 static GstDiscovererStreamInfo *
676 collect_information (GstDiscoverer * dc, const GstStructure * st,
677 GstDiscovererStreamInfo * parent)
680 GstStructure *caps_st;
686 if (!st || !gst_structure_id_has_field (st, _CAPS_QUARK)) {
687 GST_WARNING ("Couldn't find caps !");
689 return gst_discoverer_stream_info_ref (parent);
691 return (GstDiscovererStreamInfo *)
692 g_object_new (GST_TYPE_DISCOVERER_STREAM_INFO, NULL);
695 gst_structure_id_get (st, _CAPS_QUARK, GST_TYPE_CAPS, &caps, NULL);
696 caps_st = gst_caps_get_structure (caps, 0);
697 name = gst_structure_get_name (caps_st);
699 if (g_str_has_prefix (name, "audio/")) {
700 GstDiscovererAudioInfo *info;
703 info = (GstDiscovererAudioInfo *) gst_discoverer_stream_info_ref (parent);
705 info = (GstDiscovererAudioInfo *)
706 g_object_new (GST_TYPE_DISCOVERER_AUDIO_INFO, NULL);
707 info->parent.caps = gst_caps_ref (caps);
710 if (gst_structure_get_int (caps_st, "rate", &tmp))
711 info->sample_rate = (guint) tmp;
713 if (gst_structure_get_int (caps_st, "channels", &tmp))
714 info->channels = (guint) tmp;
716 if (gst_structure_get_int (caps_st, "depth", &tmp))
717 info->depth = (guint) tmp;
719 if (gst_structure_id_has_field (st, _TAGS_QUARK)) {
720 gst_structure_id_get (st, _TAGS_QUARK, GST_TYPE_TAG_LIST, &tags_st, NULL);
721 if (gst_tag_list_get_uint (tags_st, GST_TAG_BITRATE, &utmp) ||
722 gst_tag_list_get_uint (tags_st, GST_TAG_NOMINAL_BITRATE, &utmp))
723 info->bitrate = utmp;
725 if (gst_tag_list_get_uint (tags_st, GST_TAG_MAXIMUM_BITRATE, &utmp))
726 info->max_bitrate = utmp;
728 /* FIXME: Is it worth it to remove the tags we've parsed? */
729 gst_discoverer_merge_and_replace_tags (&info->parent.tags, tags_st);
732 if (!info->language && ((GstDiscovererStreamInfo *) info)->tags) {
734 if (gst_tag_list_get_string (((GstDiscovererStreamInfo *) info)->tags,
735 GST_TAG_LANGUAGE_CODE, &language)) {
736 info->language = language;
740 gst_caps_unref (caps);
741 return (GstDiscovererStreamInfo *) info;
743 } else if (g_str_has_prefix (name, "video/") ||
744 g_str_has_prefix (name, "image/")) {
745 GstDiscovererVideoInfo *info;
749 info = (GstDiscovererVideoInfo *) gst_discoverer_stream_info_ref (parent);
751 info = (GstDiscovererVideoInfo *)
752 g_object_new (GST_TYPE_DISCOVERER_VIDEO_INFO, NULL);
753 info->parent.caps = gst_caps_ref (caps);
756 /* FIXME : gst_video_info_from_caps only works with raw caps,
757 * wouldn't we want to get all the info below for non-raw caps ?
759 if (g_str_has_prefix (name, "video/x-raw") &&
760 gst_video_info_from_caps (&vinfo, caps)) {
761 info->width = (guint) vinfo.width;
762 info->height = (guint) vinfo.height;
764 info->depth = (guint) 0;
766 info->par_num = vinfo.par_n;
767 info->par_denom = vinfo.par_d;
769 info->framerate_num = vinfo.fps_n;
770 info->framerate_denom = vinfo.fps_d;
773 vinfo.interlace_mode != GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
776 if (gst_structure_id_has_field (st, _TAGS_QUARK)) {
777 gst_structure_id_get (st, _TAGS_QUARK, GST_TYPE_TAG_LIST, &tags_st, NULL);
778 if (gst_tag_list_get_uint (tags_st, GST_TAG_BITRATE, &utmp) ||
779 gst_tag_list_get_uint (tags_st, GST_TAG_NOMINAL_BITRATE, &utmp))
780 info->bitrate = utmp;
782 if (gst_tag_list_get_uint (tags_st, GST_TAG_MAXIMUM_BITRATE, &utmp))
783 info->max_bitrate = utmp;
785 /* FIXME: Is it worth it to remove the tags we've parsed? */
786 gst_discoverer_merge_and_replace_tags (&info->parent.tags,
787 (GstTagList *) tags_st);
790 gst_caps_unref (caps);
791 return (GstDiscovererStreamInfo *) info;
793 } else if (is_subtitle_caps (caps)) {
794 GstDiscovererSubtitleInfo *info;
798 (GstDiscovererSubtitleInfo *) gst_discoverer_stream_info_ref (parent);
800 info = (GstDiscovererSubtitleInfo *)
801 g_object_new (GST_TYPE_DISCOVERER_SUBTITLE_INFO, NULL);
802 info->parent.caps = gst_caps_ref (caps);
805 if (gst_structure_id_has_field (st, _TAGS_QUARK)) {
806 const gchar *language;
808 gst_structure_id_get (st, _TAGS_QUARK, GST_TYPE_TAG_LIST, &tags_st, NULL);
810 language = gst_structure_get_string (caps_st, GST_TAG_LANGUAGE_CODE);
812 info->language = g_strdup (language);
814 /* FIXME: Is it worth it to remove the tags we've parsed? */
815 gst_discoverer_merge_and_replace_tags (&info->parent.tags, tags_st);
818 if (!info->language && ((GstDiscovererStreamInfo *) info)->tags) {
820 if (gst_tag_list_get_string (((GstDiscovererStreamInfo *) info)->tags,
821 GST_TAG_LANGUAGE_CODE, &language)) {
822 info->language = language;
826 gst_caps_unref (caps);
827 return (GstDiscovererStreamInfo *) info;
830 /* None of the above - populate what information we can */
831 GstDiscovererStreamInfo *info;
834 info = gst_discoverer_stream_info_ref (parent);
836 info = (GstDiscovererStreamInfo *)
837 g_object_new (GST_TYPE_DISCOVERER_STREAM_INFO, NULL);
838 info->caps = gst_caps_ref (caps);
841 if (gst_structure_id_get (st, _TAGS_QUARK, GST_TYPE_TAG_LIST, &tags_st,
843 gst_discoverer_merge_and_replace_tags (&info->tags, tags_st);
846 gst_caps_unref (caps);
852 static GstStructure *
853 find_stream_for_node (GstDiscoverer * dc, const GstStructure * topology)
856 GstPad *target_pad = NULL;
857 GstStructure *st = NULL;
862 if (!gst_structure_id_has_field (topology, _TOPOLOGY_PAD_QUARK)) {
863 GST_DEBUG ("Could not find pad for node %" GST_PTR_FORMAT "\n", topology);
867 gst_structure_id_get (topology, _TOPOLOGY_PAD_QUARK,
868 GST_TYPE_PAD, &pad, NULL);
870 if (!dc->priv->streams) {
871 gst_object_unref (pad);
875 for (i = 0, tmp = dc->priv->streams; tmp; tmp = tmp->next, i++) {
876 ps = (PrivateStream *) tmp->data;
878 target_pad = gst_ghost_pad_get_target (GST_GHOST_PAD (ps->pad));
879 gst_object_unref (target_pad);
881 if (target_pad == pad)
886 st = collect_stream_information (dc, ps, i);
888 gst_object_unref (pad);
894 child_is_raw_stream (const GstCaps * parent, const GstCaps * child)
896 const GstStructure *st1, *st2;
897 const gchar *name1, *name2;
899 st1 = gst_caps_get_structure (parent, 0);
900 name1 = gst_structure_get_name (st1);
901 st2 = gst_caps_get_structure (child, 0);
902 name2 = gst_structure_get_name (st2);
904 if ((g_str_has_prefix (name1, "audio/") &&
905 g_str_has_prefix (name2, "audio/x-raw")) ||
906 ((g_str_has_prefix (name1, "video/") ||
907 g_str_has_prefix (name1, "image/")) &&
908 g_str_has_prefix (name2, "video/x-raw"))) {
909 /* child is the "raw" sub-stream corresponding to parent */
913 if (is_subtitle_caps (parent))
919 /* If a parent is non-NULL, collected stream information will be appended to it
920 * (and where the information exists, it will be overriden)
922 static GstDiscovererStreamInfo *
923 parse_stream_topology (GstDiscoverer * dc, const GstStructure * topology,
924 GstDiscovererStreamInfo * parent)
926 GstDiscovererStreamInfo *res = NULL;
927 GstCaps *caps = NULL;
928 const GValue *nval = NULL;
930 GST_DEBUG ("parsing: %" GST_PTR_FORMAT, topology);
932 nval = gst_structure_get_value (topology, "next");
934 if (nval == NULL || GST_VALUE_HOLDS_STRUCTURE (nval)) {
935 GstStructure *st = find_stream_for_node (dc, topology);
936 gboolean add_to_list = TRUE;
939 res = collect_information (dc, st, parent);
940 gst_structure_free (st);
942 /* Didn't find a stream structure, so let's just use the caps we have */
943 res = collect_information (dc, topology, parent);
947 /* FIXME : aggregate with information from main streams */
948 GST_DEBUG ("Coudn't find 'next' ! might be the last entry");
951 const GstStructure *st;
953 st = gst_value_get_structure (nval);
955 GST_DEBUG ("next is a structure %" GST_PTR_FORMAT, st);
960 if (gst_structure_id_get (st, _CAPS_QUARK, GST_TYPE_CAPS, &caps, NULL)) {
961 if (gst_caps_can_intersect (parent->caps, caps)) {
962 /* We sometimes get an extra sub-stream from the parser. If this is
963 * the case, we just replace the parent caps with this stream's caps
964 * since they might contain more information */
965 gst_caps_replace (&parent->caps, caps);
967 parse_stream_topology (dc, st, parent);
969 } else if (child_is_raw_stream (parent->caps, caps)) {
970 /* This is the "raw" stream corresponding to the parent. This
971 * contains more information than the parent, tags etc. */
972 parse_stream_topology (dc, st, parent);
975 GstDiscovererStreamInfo *next = parse_stream_topology (dc, st, NULL);
977 next->previous = res;
979 gst_caps_unref (caps);
984 dc->priv->current_info->stream_list =
985 g_list_append (dc->priv->current_info->stream_list, res);
987 gst_discoverer_stream_info_unref (res);
990 } else if (GST_VALUE_HOLDS_LIST (nval)) {
992 GstDiscovererContainerInfo *cont;
995 if (!gst_structure_id_get (topology, _CAPS_QUARK,
996 GST_TYPE_CAPS, &caps, NULL))
997 GST_WARNING ("Couldn't find caps !");
999 len = gst_value_list_get_size (nval);
1000 GST_DEBUG ("next is a list of %d entries", len);
1002 cont = (GstDiscovererContainerInfo *)
1003 g_object_new (GST_TYPE_DISCOVERER_CONTAINER_INFO, NULL);
1004 cont->parent.caps = caps;
1005 res = (GstDiscovererStreamInfo *) cont;
1007 if (gst_structure_id_has_field (topology, _TAGS_QUARK)) {
1010 gst_structure_id_get (topology, _TAGS_QUARK,
1011 GST_TYPE_TAG_LIST, &tags, NULL);
1013 GST_DEBUG ("Merge tags %" GST_PTR_FORMAT, tags);
1016 gst_tag_list_merge (cont->parent.tags, (GstTagList *) tags,
1017 GST_TAG_MERGE_APPEND);
1018 gst_tag_list_free (tags);
1019 if (cont->parent.tags)
1020 gst_tag_list_free (cont->parent.tags);
1021 cont->parent.tags = tmp;
1022 GST_DEBUG ("Container info tags %" GST_PTR_FORMAT, tmp);
1025 for (i = 0; i < len; i++) {
1026 const GValue *subv = gst_value_list_get_value (nval, i);
1027 const GstStructure *subst = gst_value_get_structure (subv);
1028 GstDiscovererStreamInfo *substream;
1030 GST_DEBUG ("%d %" GST_PTR_FORMAT, i, subst);
1032 substream = parse_stream_topology (dc, subst, NULL);
1034 substream->previous = res;
1036 g_list_append (cont->streams,
1037 gst_discoverer_stream_info_ref (substream));
1044 /* Called when pipeline is pre-rolled */
1046 discoverer_collect (GstDiscoverer * dc)
1048 GST_DEBUG ("Collecting information");
1050 /* Stop the timeout handler if present */
1051 if (dc->priv->timeoutid) {
1052 g_source_remove (dc->priv->timeoutid);
1053 dc->priv->timeoutid = 0;
1056 if (dc->priv->streams) {
1057 /* FIXME : Make this querying optional */
1059 GstElement *pipeline = (GstElement *) dc->priv->pipeline;
1062 GST_DEBUG ("Attempting to query duration");
1064 if (gst_element_query_duration (pipeline, GST_FORMAT_TIME, &dur)) {
1065 GST_DEBUG ("Got duration %" GST_TIME_FORMAT, GST_TIME_ARGS (dur));
1066 dc->priv->current_info->duration = (guint64) dur;
1068 GstStateChangeReturn sret;
1070 /* Some parsers may not even return a rough estimate right away, e.g.
1071 * because they've only processed a single frame so far, so if we
1072 * didn't get a duration the first time, spin a bit and try again.
1073 * Ugly, but still better than making parsers or other elements return
1074 * completely bogus values. We need some API extensions to solve this
1076 GST_INFO ("No duration yet, try a bit harder..");
1077 sret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
1078 if (sret != GST_STATE_CHANGE_FAILURE) {
1081 for (i = 0; i < 2; ++i) {
1082 g_usleep (G_USEC_PER_SEC / 20);
1083 if (gst_element_query_duration (pipeline, GST_FORMAT_TIME, &dur)
1085 GST_DEBUG ("Got duration %" GST_TIME_FORMAT, GST_TIME_ARGS (dur));
1086 dc->priv->current_info->duration = (guint64) dur;
1090 gst_element_set_state (pipeline, GST_STATE_PAUSED);
1094 if (dc->priv->seeking_query) {
1095 if (gst_element_query (pipeline, dc->priv->seeking_query)) {
1099 gst_query_parse_seeking (dc->priv->seeking_query, &format,
1100 &seekable, NULL, NULL);
1101 if (format == GST_FORMAT_TIME) {
1102 GST_DEBUG ("Got seekable %d", seekable);
1103 dc->priv->current_info->seekable = seekable;
1109 if (dc->priv->current_topology)
1110 dc->priv->current_info->stream_info = parse_stream_topology (dc,
1111 dc->priv->current_topology, NULL);
1114 * Images need some special handling. They do not have a duration, have
1115 * caps named image/<foo> (th exception being MJPEG video which is also
1116 * type image/jpeg), and should consist of precisely one stream (actually
1117 * initially there are 2, the image and raw stream, but we squash these
1118 * while parsing the stream topology). At some point, if we find that these
1119 * conditions are not sufficient, we can count the number of decoders and
1120 * parsers in the chain, and if there's more than one decoder, or any
1121 * parser at all, we should not mark this as an image.
1123 if (dc->priv->current_info->duration == 0 &&
1124 dc->priv->current_info->stream_info != NULL &&
1125 dc->priv->current_info->stream_info->next == NULL) {
1127 gst_caps_get_structure (dc->priv->current_info->stream_info->caps, 0);
1129 if (g_str_has_prefix (gst_structure_get_name (st), "image/"))
1130 ((GstDiscovererVideoInfo *) dc->priv->current_info->stream_info)->
1135 if (dc->priv->async) {
1136 GST_DEBUG ("Emitting 'discoverered'");
1137 g_signal_emit (dc, gst_discoverer_signals[SIGNAL_DISCOVERED], 0,
1138 dc->priv->current_info, dc->priv->current_error);
1139 /* Clients get a copy of current_info since it is a boxed type */
1140 gst_discoverer_info_unref (dc->priv->current_info);
1145 get_async_cb (gpointer cb_data, GSource * source, GSourceFunc * func,
1148 *func = (GSourceFunc) async_timeout_cb;
1152 /* Wrapper since GSourceCallbackFuncs don't expect a return value from ref() */
1154 _void_g_object_ref (gpointer object)
1156 g_object_ref (G_OBJECT (object));
1160 handle_current_async (GstDiscoverer * dc)
1163 static GSourceCallbackFuncs cb_funcs = {
1169 /* Attach a timeout to the main context */
1170 source = g_timeout_source_new (dc->priv->timeout / GST_MSECOND);
1171 g_source_set_callback_indirect (source, g_object_ref (dc), &cb_funcs);
1172 dc->priv->timeoutid = g_source_attach (source, dc->priv->ctx);
1173 g_source_unref (source);
1177 /* Returns TRUE if processing should stop */
1179 handle_message (GstDiscoverer * dc, GstMessage * msg)
1181 gboolean done = FALSE;
1183 GST_DEBUG_OBJECT (GST_MESSAGE_SRC (msg), "got a %s message",
1184 GST_MESSAGE_TYPE_NAME (msg));
1186 switch (GST_MESSAGE_TYPE (msg)) {
1187 case GST_MESSAGE_ERROR:{
1191 gst_message_parse_error (msg, &gerr, &debug);
1192 GST_WARNING_OBJECT (GST_MESSAGE_SRC (msg),
1193 "Got an error [debug:%s], [message:%s]", debug, gerr->message);
1194 dc->priv->current_error = gerr;
1197 /* We need to stop */
1200 /* Don't override missing plugin result code for missing plugin errors */
1201 if (dc->priv->current_info->result != GST_DISCOVERER_MISSING_PLUGINS ||
1202 (!g_error_matches (gerr, GST_CORE_ERROR,
1203 GST_CORE_ERROR_MISSING_PLUGIN) &&
1204 !g_error_matches (gerr, GST_STREAM_ERROR,
1205 GST_STREAM_ERROR_CODEC_NOT_FOUND))) {
1206 GST_DEBUG ("Setting result to ERROR");
1207 dc->priv->current_info->result = GST_DISCOVERER_ERROR;
1212 case GST_MESSAGE_EOS:
1213 GST_DEBUG ("Got EOS !");
1217 case GST_MESSAGE_APPLICATION:{
1219 gboolean async_done;
1220 name = gst_structure_get_name (gst_message_get_structure (msg));
1221 /* Maybe ASYNC_DONE is received & we're just waiting for subtitle tags */
1223 async_done = dc->priv->async_done;
1225 if (g_str_equal (name, "DiscovererDone") && async_done)
1230 case GST_MESSAGE_ASYNC_DONE:
1231 if (GST_MESSAGE_SRC (msg) == (GstObject *) dc->priv->pipeline) {
1232 GST_DEBUG ("Finished changing state asynchronously");
1234 if (dc->priv->pending_subtitle_pads == 0) {
1237 /* Remember that ASYNC_DONE has been received, wait for subtitles */
1238 dc->priv->async_done = TRUE;
1245 case GST_MESSAGE_ELEMENT:
1248 const GstStructure *structure;
1250 structure = gst_message_get_structure (msg);
1251 sttype = gst_structure_get_name_id (structure);
1252 GST_DEBUG_OBJECT (GST_MESSAGE_SRC (msg),
1253 "structure %" GST_PTR_FORMAT, structure);
1254 if (sttype == _MISSING_PLUGIN_QUARK) {
1255 GST_DEBUG_OBJECT (GST_MESSAGE_SRC (msg),
1256 "Setting result to MISSING_PLUGINS");
1257 dc->priv->current_info->result = GST_DISCOVERER_MISSING_PLUGINS;
1258 if (dc->priv->current_info->misc)
1259 gst_structure_free (dc->priv->current_info->misc);
1260 dc->priv->current_info->misc = gst_structure_copy (structure);
1261 } else if (sttype == _STREAM_TOPOLOGY_QUARK) {
1262 if (dc->priv->current_topology)
1263 gst_structure_free (dc->priv->current_topology);
1264 dc->priv->current_topology = gst_structure_copy (structure);
1269 case GST_MESSAGE_TAG:
1271 GstTagList *tl, *tmp;
1273 gst_message_parse_tag (msg, &tl);
1274 GST_DEBUG_OBJECT (GST_MESSAGE_SRC (msg), "Got tags %" GST_PTR_FORMAT, tl);
1275 /* Merge with current tags */
1277 gst_tag_list_merge (dc->priv->current_info->tags, tl,
1278 GST_TAG_MERGE_APPEND);
1279 gst_tag_list_free (tl);
1280 if (dc->priv->current_info->tags)
1281 gst_tag_list_free (dc->priv->current_info->tags);
1282 dc->priv->current_info->tags = tmp;
1283 GST_DEBUG_OBJECT (GST_MESSAGE_SRC (msg), "Current info %p, tags %"
1284 GST_PTR_FORMAT, dc->priv->current_info, tmp);
1296 handle_current_sync (GstDiscoverer * dc)
1299 gdouble deadline = ((gdouble) dc->priv->timeout) / GST_SECOND;
1301 gboolean done = FALSE;
1303 timer = g_timer_new ();
1304 g_timer_start (timer);
1307 /* poll bus with timeout */
1308 /* FIXME : make the timeout more fine-tuned */
1309 if ((msg = gst_bus_timed_pop (dc->priv->bus, GST_SECOND / 2))) {
1310 done = handle_message (dc, msg);
1311 gst_message_unref (msg);
1313 } while (!done && (g_timer_elapsed (timer, NULL) < deadline));
1317 GST_DEBUG ("we timed out! Setting result to TIMEOUT");
1318 dc->priv->current_info->result = GST_DISCOVERER_TIMEOUT;
1323 g_timer_stop (timer);
1324 g_timer_destroy (timer);
1328 _setup_locked (GstDiscoverer * dc)
1330 GstStateChangeReturn ret;
1332 GST_DEBUG ("Setting up");
1334 /* Pop URI off the pending URI list */
1335 dc->priv->current_info =
1336 (GstDiscovererInfo *) g_object_new (GST_TYPE_DISCOVERER_INFO, NULL);
1337 dc->priv->current_info->uri = (gchar *) dc->priv->pending_uris->data;
1338 dc->priv->pending_uris =
1339 g_list_delete_link (dc->priv->pending_uris, dc->priv->pending_uris);
1341 /* set uri on uridecodebin */
1342 g_object_set (dc->priv->uridecodebin, "uri", dc->priv->current_info->uri,
1345 GST_DEBUG ("Current is now %s", dc->priv->current_info->uri);
1347 dc->priv->processing = TRUE;
1349 /* set pipeline to PAUSED */
1351 GST_DEBUG ("Setting pipeline to PAUSED");
1353 gst_element_set_state ((GstElement *) dc->priv->pipeline,
1357 GST_DEBUG_OBJECT (dc, "Pipeline going to PAUSED : %s",
1358 gst_element_state_change_return_get_name (ret));
1362 discoverer_cleanup (GstDiscoverer * dc)
1364 GST_DEBUG ("Cleaning up");
1366 gst_bus_set_flushing (dc->priv->bus, TRUE);
1367 gst_element_set_state ((GstElement *) dc->priv->pipeline, GST_STATE_READY);
1368 gst_bus_set_flushing (dc->priv->bus, FALSE);
1371 if (dc->priv->current_error)
1372 g_error_free (dc->priv->current_error);
1373 dc->priv->current_error = NULL;
1374 if (dc->priv->current_topology) {
1375 gst_structure_free (dc->priv->current_topology);
1376 dc->priv->current_topology = NULL;
1379 dc->priv->current_info = NULL;
1381 dc->priv->pending_subtitle_pads = 0;
1382 dc->priv->async_done = FALSE;
1384 /* Try popping the next uri */
1385 if (dc->priv->async) {
1386 if (dc->priv->pending_uris != NULL) {
1390 handle_current_async (dc);
1394 g_signal_emit (dc, gst_discoverer_signals[SIGNAL_FINISHED], 0);
1403 discoverer_bus_cb (GstBus * bus, GstMessage * msg, GstDiscoverer * dc)
1405 if (dc->priv->processing) {
1406 if (handle_message (dc, msg)) {
1407 GST_DEBUG ("Stopping asynchronously");
1408 /* Serialise with _event_probe() */
1410 dc->priv->processing = FALSE;
1412 discoverer_collect (dc);
1413 discoverer_cleanup (dc);
1419 async_timeout_cb (GstDiscoverer * dc)
1421 if (!g_source_is_destroyed (g_main_current_source ())) {
1422 dc->priv->timeoutid = 0;
1423 GST_DEBUG ("Setting result to TIMEOUT");
1424 dc->priv->current_info->result = GST_DISCOVERER_TIMEOUT;
1425 dc->priv->processing = FALSE;
1426 discoverer_collect (dc);
1427 discoverer_cleanup (dc);
1432 /* If there is a pending URI, it will pop it from the list of pending
1433 * URIs and start the discovery on it.
1435 * Returns GST_DISCOVERER_OK if the next URI was popped and is processing,
1436 * else a error flag.
1438 static GstDiscovererResult
1439 start_discovering (GstDiscoverer * dc)
1441 GstDiscovererResult res = GST_DISCOVERER_OK;
1443 GST_DEBUG ("Starting");
1446 if (dc->priv->pending_uris == NULL) {
1447 GST_WARNING ("No URI to process");
1448 res = GST_DISCOVERER_URI_INVALID;
1453 if (dc->priv->current_info != NULL) {
1454 GST_WARNING ("Already processing a file");
1455 res = GST_DISCOVERER_BUSY;
1460 g_signal_emit (dc, gst_discoverer_signals[SIGNAL_STARTING], 0);
1466 if (dc->priv->async)
1467 handle_current_async (dc);
1469 handle_current_sync (dc);
1477 * gst_discoverer_start:
1478 * @discoverer: A #GstDiscoverer
1480 * Allow asynchronous discovering of URIs to take place.
1481 * A #GMainLoop must be available for #GstDiscoverer to properly work in
1482 * asynchronous mode.
1487 gst_discoverer_start (GstDiscoverer * discoverer)
1490 GMainContext *ctx = NULL;
1492 GST_DEBUG_OBJECT (discoverer, "Starting...");
1494 if (discoverer->priv->async) {
1495 GST_DEBUG_OBJECT (discoverer, "We were already started");
1499 discoverer->priv->async = TRUE;
1500 discoverer->priv->running = TRUE;
1502 ctx = g_main_context_get_thread_default ();
1504 /* Connect to bus signals */
1506 ctx = g_main_context_default ();
1508 source = gst_bus_create_watch (discoverer->priv->bus);
1509 g_source_set_callback (source, (GSourceFunc) gst_bus_async_signal_func,
1511 discoverer->priv->sourceid = g_source_attach (source, ctx);
1512 g_source_unref (source);
1513 discoverer->priv->ctx = g_main_context_ref (ctx);
1515 start_discovering (discoverer);
1516 GST_DEBUG_OBJECT (discoverer, "Started");
1520 * gst_discoverer_stop:
1521 * @discoverer: A #GstDiscoverer
1523 * Stop the discovery of any pending URIs and clears the list of
1524 * pending URIS (if any).
1529 gst_discoverer_stop (GstDiscoverer * discoverer)
1531 GST_DEBUG_OBJECT (discoverer, "Stopping...");
1533 if (!discoverer->priv->async) {
1534 GST_DEBUG_OBJECT (discoverer,
1535 "We were already stopped, or running synchronously");
1539 DISCO_LOCK (discoverer);
1540 if (discoverer->priv->processing) {
1541 /* We prevent any further processing by setting the bus to
1542 * flushing and setting the pipeline to READY.
1543 * _reset() will take care of the rest of the cleanup */
1544 if (discoverer->priv->bus)
1545 gst_bus_set_flushing (discoverer->priv->bus, TRUE);
1546 if (discoverer->priv->pipeline)
1547 gst_element_set_state ((GstElement *) discoverer->priv->pipeline,
1550 discoverer->priv->running = FALSE;
1551 DISCO_UNLOCK (discoverer);
1553 /* Remove timeout handler */
1554 if (discoverer->priv->timeoutid) {
1555 g_source_remove (discoverer->priv->timeoutid);
1556 discoverer->priv->timeoutid = 0;
1558 /* Remove signal watch */
1559 if (discoverer->priv->sourceid) {
1560 g_source_remove (discoverer->priv->sourceid);
1561 discoverer->priv->sourceid = 0;
1563 /* Unref main context */
1564 if (discoverer->priv->ctx) {
1565 g_main_context_unref (discoverer->priv->ctx);
1566 discoverer->priv->ctx = NULL;
1568 discoverer_reset (discoverer);
1570 discoverer->priv->async = FALSE;
1572 GST_DEBUG_OBJECT (discoverer, "Stopped");
1576 * gst_discoverer_discover_uri_async:
1577 * @discoverer: A #GstDiscoverer
1578 * @uri: the URI to add.
1580 * Appends the given @uri to the list of URIs to discoverer. The actual
1581 * discovery of the @uri will only take place if gst_discoverer_start() has
1584 * A copy of @uri will be made internally, so the caller can safely g_free()
1587 * Returns: %TRUE if the @uri was successfully appended to the list of pending
1593 gst_discoverer_discover_uri_async (GstDiscoverer * discoverer,
1598 GST_DEBUG_OBJECT (discoverer, "uri : %s", uri);
1600 DISCO_LOCK (discoverer);
1601 can_run = (discoverer->priv->pending_uris == NULL);
1602 discoverer->priv->pending_uris =
1603 g_list_append (discoverer->priv->pending_uris, g_strdup (uri));
1604 DISCO_UNLOCK (discoverer);
1607 start_discovering (discoverer);
1613 /* Synchronous mode */
1615 * gst_discoverer_discover_uri:
1616 * @discoverer: A #GstDiscoverer
1617 * @uri: The URI to run on.
1618 * @err: (out) (allow-none): If an error occurred, this field will be filled in.
1620 * Synchronously discovers the given @uri.
1622 * A copy of @uri will be made internally, so the caller can safely g_free()
1625 * Returns: (transfer full): the result of the scanning. Can be %NULL if an
1631 gst_discoverer_discover_uri (GstDiscoverer * discoverer, const gchar * uri,
1634 GstDiscovererResult res = 0;
1635 GstDiscovererInfo *info;
1637 GST_DEBUG_OBJECT (discoverer, "uri:%s", uri);
1639 DISCO_LOCK (discoverer);
1640 if (G_UNLIKELY (discoverer->priv->current_info)) {
1641 DISCO_UNLOCK (discoverer);
1642 GST_WARNING_OBJECT (discoverer, "Already handling a uri");
1646 discoverer->priv->pending_uris =
1647 g_list_append (discoverer->priv->pending_uris, g_strdup (uri));
1648 DISCO_UNLOCK (discoverer);
1650 res = start_discovering (discoverer);
1651 discoverer_collect (discoverer);
1655 if (discoverer->priv->current_error)
1656 *err = g_error_copy (discoverer->priv->current_error);
1660 if (res != GST_DISCOVERER_OK) {
1661 GST_DEBUG ("Setting result to %d (was %d)", res,
1662 discoverer->priv->current_info->result);
1663 discoverer->priv->current_info->result = res;
1665 info = discoverer->priv->current_info;
1667 discoverer_cleanup (discoverer);
1673 * gst_discoverer_new:
1674 * @timeout: timeout per file, in nanoseconds. Allowed are values between
1675 * one second (#GST_SECOND) and one hour (3600 * #GST_SECOND)
1676 * @err: a pointer to a #GError. can be %NULL
1678 * Creates a new #GstDiscoverer with the provided timeout.
1680 * Returns: (transfer full): The new #GstDiscoverer.
1681 * If an error occurred when creating the discoverer, @err will be set
1682 * accordingly and %NULL will be returned. If @err is set, the caller must
1683 * free it when no longer needed using g_error_free().
1688 gst_discoverer_new (GstClockTime timeout, GError ** err)
1692 res = g_object_new (GST_TYPE_DISCOVERER, "timeout", timeout, NULL);
1693 if (res->priv->uridecodebin == NULL) {
1695 *err = g_error_new (GST_CORE_ERROR, GST_CORE_ERROR_MISSING_PLUGIN,
1696 "Couldn't create 'uridecodebin' element");
1697 gst_object_unref (res);