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.
45 #include <gst/video/video.h>
48 #include "pbutils-marshal.h"
49 #include "pbutils-private.h"
51 #include "gst/glib-compat-private.h"
53 GST_DEBUG_CATEGORY_STATIC (discoverer_debug);
54 #define GST_CAT_DEFAULT discoverer_debug
56 static GQuark _CAPS_QUARK;
57 static GQuark _TAGS_QUARK;
58 static GQuark _TOC_QUARK;
59 static GQuark _MISSING_PLUGIN_QUARK;
60 static GQuark _STREAM_TOPOLOGY_QUARK;
61 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 _TOC_QUARK = g_quark_from_static_string ("toc");
139 _MISSING_PLUGIN_QUARK = g_quark_from_static_string ("missing-plugin");
140 _STREAM_TOPOLOGY_QUARK = g_quark_from_static_string ("stream-topology");
141 _TOPOLOGY_PAD_QUARK = g_quark_from_static_string ("pad");
144 G_DEFINE_TYPE_EXTENDED (GstDiscoverer, gst_discoverer, G_TYPE_OBJECT, 0,
155 #define DEFAULT_PROP_TIMEOUT 15 * GST_SECOND
163 static guint gst_discoverer_signals[LAST_SIGNAL] = { 0 };
165 static void gst_discoverer_set_timeout (GstDiscoverer * dc,
166 GstClockTime timeout);
167 static gboolean async_timeout_cb (GstDiscoverer * dc);
169 static void discoverer_bus_cb (GstBus * bus, GstMessage * msg,
171 static void uridecodebin_pad_added_cb (GstElement * uridecodebin, GstPad * pad,
173 static void uridecodebin_pad_removed_cb (GstElement * uridecodebin,
174 GstPad * pad, GstDiscoverer * dc);
176 static void gst_discoverer_dispose (GObject * dc);
177 static void gst_discoverer_set_property (GObject * object, guint prop_id,
178 const GValue * value, GParamSpec * pspec);
179 static void gst_discoverer_get_property (GObject * object, guint prop_id,
180 GValue * value, GParamSpec * pspec);
183 gst_discoverer_class_init (GstDiscovererClass * klass)
185 GObjectClass *gobject_class = (GObjectClass *) klass;
187 gobject_class->dispose = gst_discoverer_dispose;
189 gobject_class->set_property = gst_discoverer_set_property;
190 gobject_class->get_property = gst_discoverer_get_property;
192 g_type_class_add_private (klass, sizeof (GstDiscovererPrivate));
196 * GstDiscoverer:timeout:
198 * The duration (in nanoseconds) after which the discovery of an individual
201 * If the discovery of a URI times out, the %GST_DISCOVERER_TIMEOUT will be
202 * set on the result flags.
204 g_object_class_install_property (gobject_class, PROP_TIMEOUT,
205 g_param_spec_uint64 ("timeout", "timeout", "Timeout",
206 GST_SECOND, 3600 * GST_SECOND, DEFAULT_PROP_TIMEOUT,
207 G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS));
211 * GstDiscoverer::finished:
212 * @discoverer: the #GstDiscoverer
214 * Will be emitted when all pending URIs have been processed.
216 gst_discoverer_signals[SIGNAL_FINISHED] =
217 g_signal_new ("finished", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
218 G_STRUCT_OFFSET (GstDiscovererClass, finished),
219 NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0, G_TYPE_NONE);
222 * GstDiscoverer::starting:
223 * @discoverer: the #GstDiscoverer
225 * Will be emitted when the discover starts analyzing the pending URIs
227 gst_discoverer_signals[SIGNAL_STARTING] =
228 g_signal_new ("starting", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
229 G_STRUCT_OFFSET (GstDiscovererClass, starting),
230 NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0, G_TYPE_NONE);
233 * GstDiscoverer::discovered:
234 * @discoverer: the #GstDiscoverer
235 * @info: the results #GstDiscovererInfo
236 * @error: (type GLib.Error): #GError, which will be non-NULL if an error
237 * occurred during discovery
239 * Will be emitted when all information on a URI could be discovered.
241 gst_discoverer_signals[SIGNAL_DISCOVERED] =
242 g_signal_new ("discovered", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
243 G_STRUCT_OFFSET (GstDiscovererClass, discovered),
244 NULL, NULL, pbutils_marshal_VOID__POINTER_BOXED,
245 G_TYPE_NONE, 2, GST_TYPE_DISCOVERER_INFO,
246 G_TYPE_ERROR | G_SIGNAL_TYPE_STATIC_SCOPE);
250 uridecodebin_element_added_cb (GstElement * uridecodebin,
251 GstElement * child, GstDiscoverer * dc)
253 GST_DEBUG ("New element added to uridecodebin : %s",
254 GST_ELEMENT_NAME (child));
256 if (G_OBJECT_TYPE (child) == dc->priv->decodebin_type) {
257 g_object_set (child, "post-stream-topology", TRUE, NULL);
262 gst_discoverer_init (GstDiscoverer * dc)
265 GstFormat format = GST_FORMAT_TIME;
267 dc->priv = G_TYPE_INSTANCE_GET_PRIVATE (dc, GST_TYPE_DISCOVERER,
268 GstDiscovererPrivate);
270 dc->priv->timeout = DEFAULT_PROP_TIMEOUT;
271 dc->priv->async = FALSE;
272 dc->priv->async_done = FALSE;
274 dc->priv->lock = g_mutex_new ();
276 dc->priv->pending_subtitle_pads = 0;
278 GST_LOG ("Creating pipeline");
279 dc->priv->pipeline = (GstBin *) gst_pipeline_new ("Discoverer");
280 GST_LOG_OBJECT (dc, "Creating uridecodebin");
281 dc->priv->uridecodebin =
282 gst_element_factory_make ("uridecodebin", "discoverer-uri");
283 if (G_UNLIKELY (dc->priv->uridecodebin == NULL)) {
284 GST_ERROR ("Can't create uridecodebin");
287 GST_LOG_OBJECT (dc, "Adding uridecodebin to pipeline");
288 gst_bin_add (dc->priv->pipeline, dc->priv->uridecodebin);
290 dc->priv->pad_added_id =
291 g_signal_connect_object (dc->priv->uridecodebin, "pad-added",
292 G_CALLBACK (uridecodebin_pad_added_cb), dc, 0);
293 dc->priv->pad_remove_id =
294 g_signal_connect_object (dc->priv->uridecodebin, "pad-removed",
295 G_CALLBACK (uridecodebin_pad_removed_cb), dc, 0);
297 GST_LOG_OBJECT (dc, "Getting pipeline bus");
298 dc->priv->bus = gst_pipeline_get_bus ((GstPipeline *) dc->priv->pipeline);
300 dc->priv->bus_cb_id =
301 g_signal_connect_object (dc->priv->bus, "message",
302 G_CALLBACK (discoverer_bus_cb), dc, 0);
304 GST_DEBUG_OBJECT (dc, "Done initializing Discoverer");
306 /* This is ugly. We get the GType of decodebin so we can quickly detect
307 * when a decodebin is added to uridecodebin so we can set the
308 * post-stream-topology setting to TRUE */
309 dc->priv->element_added_id =
310 g_signal_connect_object (dc->priv->uridecodebin, "element-added",
311 G_CALLBACK (uridecodebin_element_added_cb), dc, 0);
312 tmp = gst_element_factory_make ("decodebin", NULL);
313 dc->priv->decodebin_type = G_OBJECT_TYPE (tmp);
314 gst_object_unref (tmp);
317 dc->priv->seeking_query = gst_query_new_seeking (format);
321 discoverer_reset (GstDiscoverer * dc)
323 GST_DEBUG_OBJECT (dc, "Resetting");
325 if (dc->priv->pending_uris) {
326 g_list_foreach (dc->priv->pending_uris, (GFunc) g_free, NULL);
327 g_list_free (dc->priv->pending_uris);
328 dc->priv->pending_uris = NULL;
331 if (dc->priv->pipeline)
332 gst_element_set_state ((GstElement *) dc->priv->pipeline, GST_STATE_NULL);
335 #define DISCONNECT_SIGNAL(o,i) G_STMT_START{ \
336 if ((i) && g_signal_handler_is_connected ((o), (i))) \
337 g_signal_handler_disconnect ((o), (i)); \
342 gst_discoverer_dispose (GObject * obj)
344 GstDiscoverer *dc = (GstDiscoverer *) obj;
346 GST_DEBUG_OBJECT (dc, "Disposing");
348 discoverer_reset (dc);
350 if (G_LIKELY (dc->priv->pipeline)) {
351 /* Workaround for bug #118536 */
352 DISCONNECT_SIGNAL (dc->priv->uridecodebin, dc->priv->pad_added_id);
353 DISCONNECT_SIGNAL (dc->priv->uridecodebin, dc->priv->pad_remove_id);
354 DISCONNECT_SIGNAL (dc->priv->uridecodebin, dc->priv->element_added_id);
355 DISCONNECT_SIGNAL (dc->priv->bus, dc->priv->bus_cb_id);
357 /* pipeline was set to NULL in _reset */
358 gst_object_unref (dc->priv->pipeline);
359 gst_object_unref (dc->priv->bus);
361 dc->priv->pipeline = NULL;
362 dc->priv->uridecodebin = NULL;
363 dc->priv->bus = NULL;
366 gst_discoverer_stop (dc);
368 if (dc->priv->lock) {
369 g_mutex_free (dc->priv->lock);
370 dc->priv->lock = NULL;
373 if (dc->priv->seeking_query) {
374 gst_query_unref (dc->priv->seeking_query);
375 dc->priv->seeking_query = NULL;
378 G_OBJECT_CLASS (gst_discoverer_parent_class)->dispose (obj);
382 gst_discoverer_set_property (GObject * object, guint prop_id,
383 const GValue * value, GParamSpec * pspec)
385 GstDiscoverer *dc = (GstDiscoverer *) object;
389 gst_discoverer_set_timeout (dc, g_value_get_uint64 (value));
392 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
398 gst_discoverer_get_property (GObject * object, guint prop_id,
399 GValue * value, GParamSpec * pspec)
401 GstDiscoverer *dc = (GstDiscoverer *) object;
406 g_value_set_uint64 (value, dc->priv->timeout);
410 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
416 gst_discoverer_set_timeout (GstDiscoverer * dc, GstClockTime timeout)
418 GST_DEBUG_OBJECT (dc, "timeout : %" GST_TIME_FORMAT, GST_TIME_ARGS (timeout));
420 /* FIXME : update current pending timeout if we're running */
422 dc->priv->timeout = timeout;
426 static GstPadProbeReturn
427 _event_probe (GstPad * pad, GstPadProbeInfo * info, PrivateStream * ps)
429 GstEvent *event = GST_PAD_PROBE_INFO_EVENT (info);
431 if (GST_EVENT_TYPE (event) == GST_EVENT_TAG) {
432 GstTagList *tl = NULL, *tmp;
434 gst_event_parse_tag (event, &tl);
435 GST_DEBUG_OBJECT (pad, "tags %" GST_PTR_FORMAT, tl);
437 /* If preroll is complete, drop these tags - the collected information is
438 * possibly already being processed and adding more tags would be racy */
439 if (G_LIKELY (ps->dc->priv->processing)) {
440 GST_DEBUG_OBJECT (pad, "private stream %p old tags %" GST_PTR_FORMAT, ps,
442 tmp = gst_tag_list_merge (ps->tags, tl, GST_TAG_MERGE_APPEND);
444 gst_tag_list_free (ps->tags);
446 GST_DEBUG_OBJECT (pad, "private stream %p new tags %" GST_PTR_FORMAT, ps,
449 GST_DEBUG_OBJECT (pad, "Dropping tags since preroll is done");
450 DISCO_UNLOCK (ps->dc);
453 if (GST_EVENT_TYPE (event) == GST_EVENT_TOC) {
456 gst_event_parse_toc (event, &tmp, NULL);
457 GST_DEBUG_OBJECT (pad, "toc %" GST_PTR_FORMAT, tmp);
460 if (G_LIKELY (ps->dc->priv->processing)) {
461 GST_DEBUG_OBJECT (pad, "private stream %p toc %" GST_PTR_FORMAT, ps, tmp);
463 GST_DEBUG_OBJECT (pad, "Dropping toc since preroll is done");
464 DISCO_UNLOCK (ps->dc);
467 return GST_PAD_PROBE_OK;
470 static GstStaticCaps subtitle_caps = GST_STATIC_CAPS ("text/plain; "
471 "text/x-pango-markup; subpicture/x-pgs; subpicture/x-dvb; "
472 "application/x-subtitle-unknown; application/x-ssa; application/x-ass; "
473 "subtitle/x-kate; application/x-kate; video/x-dvd-subpicture");
476 is_subtitle_caps (const GstCaps * caps)
481 subs_caps = gst_static_caps_get (&subtitle_caps);
482 ret = gst_caps_can_intersect (caps, subs_caps);
483 gst_caps_unref (subs_caps);
488 static GstPadProbeReturn
489 got_subtitle_data (GstPad * pad, GstPadProbeInfo * info, GstDiscoverer * dc)
492 if (!(GST_IS_BUFFER (info->data) || (GST_IS_EVENT (info->data)
493 && GST_EVENT_TYPE ((GstEvent *) info->data) == GST_EVENT_GAP)))
494 return GST_PAD_PROBE_OK;
499 dc->priv->pending_subtitle_pads--;
501 if (dc->priv->pending_subtitle_pads == 0) {
502 GstMessage *msg = gst_message_new_application (NULL,
503 gst_structure_new_empty ("DiscovererDone"));
504 gst_element_post_message ((GstElement *) dc->priv->pipeline, msg);
508 return GST_PAD_PROBE_REMOVE;
513 uridecodebin_pad_added_cb (GstElement * uridecodebin, GstPad * pad,
517 GstPad *sinkpad = NULL;
520 GST_DEBUG_OBJECT (dc, "pad %s:%s", GST_DEBUG_PAD_NAME (pad));
522 ps = g_slice_new0 (PrivateStream);
526 ps->queue = gst_element_factory_make ("queue", NULL);
527 ps->sink = gst_element_factory_make ("fakesink", NULL);
529 if (G_UNLIKELY (ps->queue == NULL || ps->sink == NULL))
532 g_object_set (ps->sink, "silent", TRUE, NULL);
533 g_object_set (ps->queue, "max-size-buffers", 1, "silent", TRUE, NULL);
535 caps = gst_pad_query_caps (pad, NULL);
537 sinkpad = gst_element_get_static_pad (ps->queue, "sink");
541 if (is_subtitle_caps (caps)) {
542 /* Subtitle streams are sparse and may not provide any information - don't
543 * wait for data to preroll */
544 gst_pad_add_probe (sinkpad, GST_PAD_PROBE_TYPE_DATA_DOWNSTREAM,
545 (GstPadProbeCallback) got_subtitle_data, dc, NULL);
546 g_object_set (ps->sink, "async", FALSE, NULL);
548 dc->priv->pending_subtitle_pads++;
552 gst_caps_unref (caps);
554 gst_bin_add_many (dc->priv->pipeline, ps->queue, ps->sink, NULL);
556 if (!gst_element_link_pads_full (ps->queue, "src", ps->sink, "sink",
557 GST_PAD_LINK_CHECK_NOTHING))
559 if (!gst_element_sync_state_with_parent (ps->sink))
561 if (!gst_element_sync_state_with_parent (ps->queue))
564 if (gst_pad_link_full (pad, sinkpad,
565 GST_PAD_LINK_CHECK_NOTHING) != GST_PAD_LINK_OK)
567 gst_object_unref (sinkpad);
569 /* Add an event probe */
570 gst_pad_add_probe (pad, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM,
571 (GstPadProbeCallback) _event_probe, ps, NULL);
574 dc->priv->streams = g_list_append (dc->priv->streams, ps);
577 GST_DEBUG_OBJECT (dc, "Done handling pad");
582 GST_ERROR_OBJECT (dc, "Error while handling pad");
584 gst_object_unref (sinkpad);
586 gst_object_unref (ps->queue);
588 gst_object_unref (ps->sink);
589 g_slice_free (PrivateStream, ps);
594 uridecodebin_pad_removed_cb (GstElement * uridecodebin, GstPad * pad,
601 GST_DEBUG_OBJECT (dc, "pad %s:%s", GST_DEBUG_PAD_NAME (pad));
603 /* Find the PrivateStream */
605 for (tmp = dc->priv->streams; tmp; tmp = tmp->next) {
606 ps = (PrivateStream *) tmp->data;
613 GST_DEBUG ("The removed pad wasn't controlled by us !");
617 dc->priv->streams = g_list_delete_link (dc->priv->streams, tmp);
620 gst_element_set_state (ps->sink, GST_STATE_NULL);
621 gst_element_set_state (ps->queue, GST_STATE_NULL);
622 gst_element_unlink (ps->queue, ps->sink);
624 sinkpad = gst_element_get_static_pad (ps->queue, "sink");
625 gst_pad_unlink (pad, sinkpad);
626 gst_object_unref (sinkpad);
628 /* references removed here */
629 gst_bin_remove_many (dc->priv->pipeline, ps->sink, ps->queue, NULL);
632 gst_tag_list_free (ps->tags);
635 gst_toc_unref (ps->toc);
638 g_slice_free (PrivateStream, ps);
640 GST_DEBUG ("Done handling pad");
643 static GstStructure *
644 collect_stream_information (GstDiscoverer * dc, PrivateStream * ps, guint idx)
650 stname = g_strdup_printf ("stream-%02d", idx);
651 st = gst_structure_new_empty (stname);
655 caps = gst_pad_get_current_caps (ps->pad);
657 GST_WARNING ("Couldn't get negotiated caps from %s:%s",
658 GST_DEBUG_PAD_NAME (ps->pad));
659 caps = gst_pad_query_caps (ps->pad, NULL);
662 GST_DEBUG ("Got caps %" GST_PTR_FORMAT, caps);
663 gst_structure_id_set (st, _CAPS_QUARK, GST_TYPE_CAPS, caps, NULL);
665 gst_caps_unref (caps);
668 gst_structure_id_set (st, _TAGS_QUARK, GST_TYPE_TAG_LIST, ps->tags, NULL);
670 gst_structure_id_set (st, _TOC_QUARK, GST_TYPE_TOC, ps->toc, NULL);
675 /* takes ownership of new_tags, may replace *taglist with a new one */
677 gst_discoverer_merge_and_replace_tags (GstTagList ** taglist,
678 GstTagList * new_tags)
680 if (new_tags == NULL)
683 if (*taglist == NULL) {
688 gst_tag_list_insert (*taglist, new_tags, GST_TAG_MERGE_REPLACE);
689 gst_tag_list_free (new_tags);
692 /* Parses a set of caps and tags in st and populates a GstDiscovererStreamInfo
693 * structure (parent, if !NULL, otherwise it allocates one)
695 static GstDiscovererStreamInfo *
696 collect_information (GstDiscoverer * dc, const GstStructure * st,
697 GstDiscovererStreamInfo * parent)
700 GstStructure *caps_st;
707 if (!st || !gst_structure_id_has_field (st, _CAPS_QUARK)) {
708 GST_WARNING ("Couldn't find caps !");
710 return gst_discoverer_stream_info_ref (parent);
712 return (GstDiscovererStreamInfo *)
713 g_object_new (GST_TYPE_DISCOVERER_STREAM_INFO, NULL);
716 gst_structure_id_get (st, _CAPS_QUARK, GST_TYPE_CAPS, &caps, NULL);
717 caps_st = gst_caps_get_structure (caps, 0);
718 name = gst_structure_get_name (caps_st);
720 if (g_str_has_prefix (name, "audio/")) {
721 GstDiscovererAudioInfo *info;
724 info = (GstDiscovererAudioInfo *) gst_discoverer_stream_info_ref (parent);
726 info = (GstDiscovererAudioInfo *)
727 g_object_new (GST_TYPE_DISCOVERER_AUDIO_INFO, NULL);
728 info->parent.caps = gst_caps_ref (caps);
731 if (gst_structure_get_int (caps_st, "rate", &tmp))
732 info->sample_rate = (guint) tmp;
734 if (gst_structure_get_int (caps_st, "channels", &tmp))
735 info->channels = (guint) tmp;
737 if (gst_structure_get_int (caps_st, "depth", &tmp))
738 info->depth = (guint) tmp;
740 if (gst_structure_id_has_field (st, _TAGS_QUARK)) {
741 gst_structure_id_get (st, _TAGS_QUARK, GST_TYPE_TAG_LIST, &tags_st, NULL);
742 if (gst_tag_list_get_uint (tags_st, GST_TAG_BITRATE, &utmp) ||
743 gst_tag_list_get_uint (tags_st, GST_TAG_NOMINAL_BITRATE, &utmp))
744 info->bitrate = utmp;
746 if (gst_tag_list_get_uint (tags_st, GST_TAG_MAXIMUM_BITRATE, &utmp))
747 info->max_bitrate = utmp;
749 /* FIXME: Is it worth it to remove the tags we've parsed? */
750 gst_discoverer_merge_and_replace_tags (&info->parent.tags, tags_st);
753 if (gst_structure_id_has_field (st, _TOC_QUARK)) {
754 gst_structure_id_get (st, _TOC_QUARK, GST_TYPE_TOC, &toc_st, NULL);
755 info->parent.toc = toc_st;
758 if (!info->language && ((GstDiscovererStreamInfo *) info)->tags) {
760 if (gst_tag_list_get_string (((GstDiscovererStreamInfo *) info)->tags,
761 GST_TAG_LANGUAGE_CODE, &language)) {
762 info->language = language;
766 gst_caps_unref (caps);
767 return (GstDiscovererStreamInfo *) info;
769 } else if (g_str_has_prefix (name, "video/") ||
770 g_str_has_prefix (name, "image/")) {
771 GstDiscovererVideoInfo *info;
775 info = (GstDiscovererVideoInfo *) gst_discoverer_stream_info_ref (parent);
777 info = (GstDiscovererVideoInfo *)
778 g_object_new (GST_TYPE_DISCOVERER_VIDEO_INFO, NULL);
779 info->parent.caps = gst_caps_ref (caps);
782 /* FIXME : gst_video_info_from_caps only works with raw caps,
783 * wouldn't we want to get all the info below for non-raw caps ?
785 if (g_str_has_prefix (name, "video/x-raw") &&
786 gst_video_info_from_caps (&vinfo, caps)) {
787 info->width = (guint) vinfo.width;
788 info->height = (guint) vinfo.height;
790 info->depth = (guint) 0;
792 info->par_num = vinfo.par_n;
793 info->par_denom = vinfo.par_d;
795 info->framerate_num = vinfo.fps_n;
796 info->framerate_denom = vinfo.fps_d;
799 vinfo.interlace_mode != GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
802 if (gst_structure_id_has_field (st, _TAGS_QUARK)) {
803 gst_structure_id_get (st, _TAGS_QUARK, GST_TYPE_TAG_LIST, &tags_st, NULL);
804 if (gst_tag_list_get_uint (tags_st, GST_TAG_BITRATE, &utmp) ||
805 gst_tag_list_get_uint (tags_st, GST_TAG_NOMINAL_BITRATE, &utmp))
806 info->bitrate = utmp;
808 if (gst_tag_list_get_uint (tags_st, GST_TAG_MAXIMUM_BITRATE, &utmp))
809 info->max_bitrate = utmp;
811 /* FIXME: Is it worth it to remove the tags we've parsed? */
812 gst_discoverer_merge_and_replace_tags (&info->parent.tags,
813 (GstTagList *) tags_st);
816 if (gst_structure_id_has_field (st, _TOC_QUARK)) {
817 gst_structure_id_get (st, _TOC_QUARK, GST_TYPE_TOC, &toc_st, NULL);
818 info->parent.toc = toc_st;
821 gst_caps_unref (caps);
822 return (GstDiscovererStreamInfo *) info;
824 } else if (is_subtitle_caps (caps)) {
825 GstDiscovererSubtitleInfo *info;
829 (GstDiscovererSubtitleInfo *) gst_discoverer_stream_info_ref (parent);
831 info = (GstDiscovererSubtitleInfo *)
832 g_object_new (GST_TYPE_DISCOVERER_SUBTITLE_INFO, NULL);
833 info->parent.caps = gst_caps_ref (caps);
836 if (gst_structure_id_has_field (st, _TAGS_QUARK)) {
837 const gchar *language;
839 gst_structure_id_get (st, _TAGS_QUARK, GST_TYPE_TAG_LIST, &tags_st, NULL);
841 language = gst_structure_get_string (caps_st, GST_TAG_LANGUAGE_CODE);
843 info->language = g_strdup (language);
845 /* FIXME: Is it worth it to remove the tags we've parsed? */
846 gst_discoverer_merge_and_replace_tags (&info->parent.tags, tags_st);
849 if (gst_structure_id_has_field (st, _TOC_QUARK)) {
850 gst_structure_id_get (st, _TOC_QUARK, GST_TYPE_TOC, &toc_st, NULL);
851 info->parent.toc = toc_st;
854 if (!info->language && ((GstDiscovererStreamInfo *) info)->tags) {
856 if (gst_tag_list_get_string (((GstDiscovererStreamInfo *) info)->tags,
857 GST_TAG_LANGUAGE_CODE, &language)) {
858 info->language = language;
862 gst_caps_unref (caps);
863 return (GstDiscovererStreamInfo *) info;
866 /* None of the above - populate what information we can */
867 GstDiscovererStreamInfo *info;
870 info = gst_discoverer_stream_info_ref (parent);
872 info = (GstDiscovererStreamInfo *)
873 g_object_new (GST_TYPE_DISCOVERER_STREAM_INFO, NULL);
874 info->caps = gst_caps_ref (caps);
877 if (gst_structure_id_get (st, _TAGS_QUARK, GST_TYPE_TAG_LIST, &tags_st,
879 gst_discoverer_merge_and_replace_tags (&info->tags, tags_st);
882 if (gst_structure_id_get (st, _TOC_QUARK, GST_TYPE_TOC, &toc_st, NULL)) {
886 gst_caps_unref (caps);
892 static GstStructure *
893 find_stream_for_node (GstDiscoverer * dc, const GstStructure * topology)
896 GstPad *target_pad = NULL;
897 GstStructure *st = NULL;
902 if (!gst_structure_id_has_field (topology, _TOPOLOGY_PAD_QUARK)) {
903 GST_DEBUG ("Could not find pad for node %" GST_PTR_FORMAT "\n", topology);
907 gst_structure_id_get (topology, _TOPOLOGY_PAD_QUARK,
908 GST_TYPE_PAD, &pad, NULL);
910 if (!dc->priv->streams) {
911 gst_object_unref (pad);
915 for (i = 0, tmp = dc->priv->streams; tmp; tmp = tmp->next, i++) {
916 ps = (PrivateStream *) tmp->data;
918 target_pad = gst_ghost_pad_get_target (GST_GHOST_PAD (ps->pad));
919 gst_object_unref (target_pad);
921 if (target_pad == pad)
926 st = collect_stream_information (dc, ps, i);
928 gst_object_unref (pad);
934 child_is_raw_stream (const GstCaps * parent, const GstCaps * child)
936 const GstStructure *st1, *st2;
937 const gchar *name1, *name2;
939 st1 = gst_caps_get_structure (parent, 0);
940 name1 = gst_structure_get_name (st1);
941 st2 = gst_caps_get_structure (child, 0);
942 name2 = gst_structure_get_name (st2);
944 if ((g_str_has_prefix (name1, "audio/") &&
945 g_str_has_prefix (name2, "audio/x-raw")) ||
946 ((g_str_has_prefix (name1, "video/") ||
947 g_str_has_prefix (name1, "image/")) &&
948 g_str_has_prefix (name2, "video/x-raw"))) {
949 /* child is the "raw" sub-stream corresponding to parent */
953 if (is_subtitle_caps (parent))
959 /* If a parent is non-NULL, collected stream information will be appended to it
960 * (and where the information exists, it will be overriden)
962 static GstDiscovererStreamInfo *
963 parse_stream_topology (GstDiscoverer * dc, const GstStructure * topology,
964 GstDiscovererStreamInfo * parent)
966 GstDiscovererStreamInfo *res = NULL;
967 GstCaps *caps = NULL;
968 const GValue *nval = NULL;
970 GST_DEBUG ("parsing: %" GST_PTR_FORMAT, topology);
972 nval = gst_structure_get_value (topology, "next");
974 if (nval == NULL || GST_VALUE_HOLDS_STRUCTURE (nval)) {
975 GstStructure *st = find_stream_for_node (dc, topology);
976 gboolean add_to_list = TRUE;
979 res = collect_information (dc, st, parent);
980 gst_structure_free (st);
982 /* Didn't find a stream structure, so let's just use the caps we have */
983 res = collect_information (dc, topology, parent);
987 /* FIXME : aggregate with information from main streams */
988 GST_DEBUG ("Coudn't find 'next' ! might be the last entry");
991 const GstStructure *st;
993 st = gst_value_get_structure (nval);
995 GST_DEBUG ("next is a structure %" GST_PTR_FORMAT, st);
1000 if (gst_structure_id_get (st, _CAPS_QUARK, GST_TYPE_CAPS, &caps, NULL)) {
1001 if (gst_caps_can_intersect (parent->caps, caps)) {
1002 /* We sometimes get an extra sub-stream from the parser. If this is
1003 * the case, we just replace the parent caps with this stream's caps
1004 * since they might contain more information */
1005 gst_caps_replace (&parent->caps, caps);
1007 parse_stream_topology (dc, st, parent);
1008 add_to_list = FALSE;
1009 } else if (child_is_raw_stream (parent->caps, caps)) {
1010 /* This is the "raw" stream corresponding to the parent. This
1011 * contains more information than the parent, tags etc. */
1012 parse_stream_topology (dc, st, parent);
1013 add_to_list = FALSE;
1015 GstDiscovererStreamInfo *next = parse_stream_topology (dc, st, NULL);
1017 next->previous = res;
1019 gst_caps_unref (caps);
1024 dc->priv->current_info->stream_list =
1025 g_list_append (dc->priv->current_info->stream_list, res);
1027 gst_discoverer_stream_info_unref (res);
1030 } else if (GST_VALUE_HOLDS_LIST (nval)) {
1032 GstDiscovererContainerInfo *cont;
1035 if (!gst_structure_id_get (topology, _CAPS_QUARK,
1036 GST_TYPE_CAPS, &caps, NULL))
1037 GST_WARNING ("Couldn't find caps !");
1039 len = gst_value_list_get_size (nval);
1040 GST_DEBUG ("next is a list of %d entries", len);
1042 cont = (GstDiscovererContainerInfo *)
1043 g_object_new (GST_TYPE_DISCOVERER_CONTAINER_INFO, NULL);
1044 cont->parent.caps = caps;
1045 res = (GstDiscovererStreamInfo *) cont;
1047 if (gst_structure_id_has_field (topology, _TAGS_QUARK)) {
1050 gst_structure_id_get (topology, _TAGS_QUARK,
1051 GST_TYPE_TAG_LIST, &tags, NULL);
1053 GST_DEBUG ("Merge tags %" GST_PTR_FORMAT, tags);
1056 gst_tag_list_merge (cont->parent.tags, (GstTagList *) tags,
1057 GST_TAG_MERGE_APPEND);
1058 gst_tag_list_free (tags);
1059 if (cont->parent.tags)
1060 gst_tag_list_free (cont->parent.tags);
1061 cont->parent.tags = tmp;
1062 GST_DEBUG ("Container info tags %" GST_PTR_FORMAT, tmp);
1065 for (i = 0; i < len; i++) {
1066 const GValue *subv = gst_value_list_get_value (nval, i);
1067 const GstStructure *subst = gst_value_get_structure (subv);
1068 GstDiscovererStreamInfo *substream;
1070 GST_DEBUG ("%d %" GST_PTR_FORMAT, i, subst);
1072 substream = parse_stream_topology (dc, subst, NULL);
1074 substream->previous = res;
1076 g_list_append (cont->streams,
1077 gst_discoverer_stream_info_ref (substream));
1084 /* Called when pipeline is pre-rolled */
1086 discoverer_collect (GstDiscoverer * dc)
1088 GST_DEBUG ("Collecting information");
1090 /* Stop the timeout handler if present */
1091 if (dc->priv->timeoutid) {
1092 g_source_remove (dc->priv->timeoutid);
1093 dc->priv->timeoutid = 0;
1096 if (dc->priv->streams) {
1097 /* FIXME : Make this querying optional */
1099 GstElement *pipeline = (GstElement *) dc->priv->pipeline;
1102 GST_DEBUG ("Attempting to query duration");
1104 if (gst_element_query_duration (pipeline, GST_FORMAT_TIME, &dur)) {
1105 GST_DEBUG ("Got duration %" GST_TIME_FORMAT, GST_TIME_ARGS (dur));
1106 dc->priv->current_info->duration = (guint64) dur;
1108 GstStateChangeReturn sret;
1110 /* Some parsers may not even return a rough estimate right away, e.g.
1111 * because they've only processed a single frame so far, so if we
1112 * didn't get a duration the first time, spin a bit and try again.
1113 * Ugly, but still better than making parsers or other elements return
1114 * completely bogus values. We need some API extensions to solve this
1116 GST_INFO ("No duration yet, try a bit harder..");
1117 sret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
1118 if (sret != GST_STATE_CHANGE_FAILURE) {
1121 for (i = 0; i < 2; ++i) {
1122 g_usleep (G_USEC_PER_SEC / 20);
1123 if (gst_element_query_duration (pipeline, GST_FORMAT_TIME, &dur)
1125 GST_DEBUG ("Got duration %" GST_TIME_FORMAT, GST_TIME_ARGS (dur));
1126 dc->priv->current_info->duration = (guint64) dur;
1130 gst_element_set_state (pipeline, GST_STATE_PAUSED);
1134 if (dc->priv->seeking_query) {
1135 if (gst_element_query (pipeline, dc->priv->seeking_query)) {
1139 gst_query_parse_seeking (dc->priv->seeking_query, &format,
1140 &seekable, NULL, NULL);
1141 if (format == GST_FORMAT_TIME) {
1142 GST_DEBUG ("Got seekable %d", seekable);
1143 dc->priv->current_info->seekable = seekable;
1149 if (dc->priv->current_topology)
1150 dc->priv->current_info->stream_info = parse_stream_topology (dc,
1151 dc->priv->current_topology, NULL);
1154 * Images need some special handling. They do not have a duration, have
1155 * caps named image/<foo> (th exception being MJPEG video which is also
1156 * type image/jpeg), and should consist of precisely one stream (actually
1157 * initially there are 2, the image and raw stream, but we squash these
1158 * while parsing the stream topology). At some point, if we find that these
1159 * conditions are not sufficient, we can count the number of decoders and
1160 * parsers in the chain, and if there's more than one decoder, or any
1161 * parser at all, we should not mark this as an image.
1163 if (dc->priv->current_info->duration == 0 &&
1164 dc->priv->current_info->stream_info != NULL &&
1165 dc->priv->current_info->stream_info->next == NULL) {
1167 gst_caps_get_structure (dc->priv->current_info->stream_info->caps, 0);
1169 if (g_str_has_prefix (gst_structure_get_name (st), "image/"))
1170 ((GstDiscovererVideoInfo *) dc->priv->current_info->stream_info)->
1175 if (dc->priv->async) {
1176 GST_DEBUG ("Emitting 'discoverered'");
1177 g_signal_emit (dc, gst_discoverer_signals[SIGNAL_DISCOVERED], 0,
1178 dc->priv->current_info, dc->priv->current_error);
1179 /* Clients get a copy of current_info since it is a boxed type */
1180 gst_discoverer_info_unref (dc->priv->current_info);
1185 get_async_cb (gpointer cb_data, GSource * source, GSourceFunc * func,
1188 *func = (GSourceFunc) async_timeout_cb;
1192 /* Wrapper since GSourceCallbackFuncs don't expect a return value from ref() */
1194 _void_g_object_ref (gpointer object)
1196 g_object_ref (G_OBJECT (object));
1200 handle_current_async (GstDiscoverer * dc)
1203 static GSourceCallbackFuncs cb_funcs = {
1209 /* Attach a timeout to the main context */
1210 source = g_timeout_source_new (dc->priv->timeout / GST_MSECOND);
1211 g_source_set_callback_indirect (source, g_object_ref (dc), &cb_funcs);
1212 dc->priv->timeoutid = g_source_attach (source, dc->priv->ctx);
1213 g_source_unref (source);
1217 /* Returns TRUE if processing should stop */
1219 handle_message (GstDiscoverer * dc, GstMessage * msg)
1221 gboolean done = FALSE;
1223 GST_DEBUG_OBJECT (GST_MESSAGE_SRC (msg), "got a %s message",
1224 GST_MESSAGE_TYPE_NAME (msg));
1226 switch (GST_MESSAGE_TYPE (msg)) {
1227 case GST_MESSAGE_ERROR:{
1231 gst_message_parse_error (msg, &gerr, &debug);
1232 GST_WARNING_OBJECT (GST_MESSAGE_SRC (msg),
1233 "Got an error [debug:%s], [message:%s]", debug, gerr->message);
1234 dc->priv->current_error = gerr;
1237 /* We need to stop */
1240 /* Don't override missing plugin result code for missing plugin errors */
1241 if (dc->priv->current_info->result != GST_DISCOVERER_MISSING_PLUGINS ||
1242 (!g_error_matches (gerr, GST_CORE_ERROR,
1243 GST_CORE_ERROR_MISSING_PLUGIN) &&
1244 !g_error_matches (gerr, GST_STREAM_ERROR,
1245 GST_STREAM_ERROR_CODEC_NOT_FOUND))) {
1246 GST_DEBUG ("Setting result to ERROR");
1247 dc->priv->current_info->result = GST_DISCOVERER_ERROR;
1252 case GST_MESSAGE_EOS:
1253 GST_DEBUG ("Got EOS !");
1257 case GST_MESSAGE_APPLICATION:{
1259 gboolean async_done;
1260 name = gst_structure_get_name (gst_message_get_structure (msg));
1261 /* Maybe ASYNC_DONE is received & we're just waiting for subtitle tags */
1263 async_done = dc->priv->async_done;
1265 if (g_str_equal (name, "DiscovererDone") && async_done)
1270 case GST_MESSAGE_ASYNC_DONE:
1271 if (GST_MESSAGE_SRC (msg) == (GstObject *) dc->priv->pipeline) {
1272 GST_DEBUG ("Finished changing state asynchronously");
1274 if (dc->priv->pending_subtitle_pads == 0) {
1277 /* Remember that ASYNC_DONE has been received, wait for subtitles */
1278 dc->priv->async_done = TRUE;
1285 case GST_MESSAGE_ELEMENT:
1288 const GstStructure *structure;
1290 structure = gst_message_get_structure (msg);
1291 sttype = gst_structure_get_name_id (structure);
1292 GST_DEBUG_OBJECT (GST_MESSAGE_SRC (msg),
1293 "structure %" GST_PTR_FORMAT, structure);
1294 if (sttype == _MISSING_PLUGIN_QUARK) {
1295 GST_DEBUG_OBJECT (GST_MESSAGE_SRC (msg),
1296 "Setting result to MISSING_PLUGINS");
1297 dc->priv->current_info->result = GST_DISCOVERER_MISSING_PLUGINS;
1298 if (dc->priv->current_info->misc)
1299 gst_structure_free (dc->priv->current_info->misc);
1300 dc->priv->current_info->misc = gst_structure_copy (structure);
1301 } else if (sttype == _STREAM_TOPOLOGY_QUARK) {
1302 if (dc->priv->current_topology)
1303 gst_structure_free (dc->priv->current_topology);
1304 dc->priv->current_topology = gst_structure_copy (structure);
1309 case GST_MESSAGE_TAG:
1311 GstTagList *tl, *tmp;
1313 gst_message_parse_tag (msg, &tl);
1314 GST_DEBUG_OBJECT (GST_MESSAGE_SRC (msg), "Got tags %" GST_PTR_FORMAT, tl);
1315 /* Merge with current tags */
1317 gst_tag_list_merge (dc->priv->current_info->tags, tl,
1318 GST_TAG_MERGE_APPEND);
1319 gst_tag_list_free (tl);
1320 if (dc->priv->current_info->tags)
1321 gst_tag_list_free (dc->priv->current_info->tags);
1322 dc->priv->current_info->tags = tmp;
1323 GST_DEBUG_OBJECT (GST_MESSAGE_SRC (msg), "Current info %p, tags %"
1324 GST_PTR_FORMAT, dc->priv->current_info, tmp);
1328 case GST_MESSAGE_TOC:
1332 gst_message_parse_toc (msg, &tmp, NULL);
1333 GST_DEBUG_OBJECT (GST_MESSAGE_SRC (msg), "Got toc %" GST_PTR_FORMAT, tmp);
1334 dc->priv->current_info->toc = tmp;
1335 GST_DEBUG_OBJECT (GST_MESSAGE_SRC (msg), "Current info %p, toc %"
1336 GST_PTR_FORMAT, dc->priv->current_info, tmp);
1348 handle_current_sync (GstDiscoverer * dc)
1351 gdouble deadline = ((gdouble) dc->priv->timeout) / GST_SECOND;
1353 gboolean done = FALSE;
1355 timer = g_timer_new ();
1356 g_timer_start (timer);
1359 /* poll bus with timeout */
1360 /* FIXME : make the timeout more fine-tuned */
1361 if ((msg = gst_bus_timed_pop (dc->priv->bus, GST_SECOND / 2))) {
1362 done = handle_message (dc, msg);
1363 gst_message_unref (msg);
1365 } while (!done && (g_timer_elapsed (timer, NULL) < deadline));
1369 GST_DEBUG ("we timed out! Setting result to TIMEOUT");
1370 dc->priv->current_info->result = GST_DISCOVERER_TIMEOUT;
1375 g_timer_stop (timer);
1376 g_timer_destroy (timer);
1380 _setup_locked (GstDiscoverer * dc)
1382 GstStateChangeReturn ret;
1384 GST_DEBUG ("Setting up");
1386 /* Pop URI off the pending URI list */
1387 dc->priv->current_info =
1388 (GstDiscovererInfo *) g_object_new (GST_TYPE_DISCOVERER_INFO, NULL);
1389 dc->priv->current_info->uri = (gchar *) dc->priv->pending_uris->data;
1390 dc->priv->pending_uris =
1391 g_list_delete_link (dc->priv->pending_uris, dc->priv->pending_uris);
1393 /* set uri on uridecodebin */
1394 g_object_set (dc->priv->uridecodebin, "uri", dc->priv->current_info->uri,
1397 GST_DEBUG ("Current is now %s", dc->priv->current_info->uri);
1399 dc->priv->processing = TRUE;
1401 /* set pipeline to PAUSED */
1403 GST_DEBUG ("Setting pipeline to PAUSED");
1405 gst_element_set_state ((GstElement *) dc->priv->pipeline,
1409 GST_DEBUG_OBJECT (dc, "Pipeline going to PAUSED : %s",
1410 gst_element_state_change_return_get_name (ret));
1414 discoverer_cleanup (GstDiscoverer * dc)
1416 GST_DEBUG ("Cleaning up");
1418 gst_bus_set_flushing (dc->priv->bus, TRUE);
1419 gst_element_set_state ((GstElement *) dc->priv->pipeline, GST_STATE_READY);
1420 gst_bus_set_flushing (dc->priv->bus, FALSE);
1423 if (dc->priv->current_error)
1424 g_error_free (dc->priv->current_error);
1425 dc->priv->current_error = NULL;
1426 if (dc->priv->current_topology) {
1427 gst_structure_free (dc->priv->current_topology);
1428 dc->priv->current_topology = NULL;
1431 dc->priv->current_info = NULL;
1433 dc->priv->pending_subtitle_pads = 0;
1434 dc->priv->async_done = FALSE;
1436 /* Try popping the next uri */
1437 if (dc->priv->async) {
1438 if (dc->priv->pending_uris != NULL) {
1442 handle_current_async (dc);
1446 g_signal_emit (dc, gst_discoverer_signals[SIGNAL_FINISHED], 0);
1455 discoverer_bus_cb (GstBus * bus, GstMessage * msg, GstDiscoverer * dc)
1457 if (dc->priv->processing) {
1458 if (handle_message (dc, msg)) {
1459 GST_DEBUG ("Stopping asynchronously");
1460 /* Serialise with _event_probe() */
1462 dc->priv->processing = FALSE;
1464 discoverer_collect (dc);
1465 discoverer_cleanup (dc);
1471 async_timeout_cb (GstDiscoverer * dc)
1473 if (!g_source_is_destroyed (g_main_current_source ())) {
1474 dc->priv->timeoutid = 0;
1475 GST_DEBUG ("Setting result to TIMEOUT");
1476 dc->priv->current_info->result = GST_DISCOVERER_TIMEOUT;
1477 dc->priv->processing = FALSE;
1478 discoverer_collect (dc);
1479 discoverer_cleanup (dc);
1484 /* If there is a pending URI, it will pop it from the list of pending
1485 * URIs and start the discovery on it.
1487 * Returns GST_DISCOVERER_OK if the next URI was popped and is processing,
1488 * else a error flag.
1490 static GstDiscovererResult
1491 start_discovering (GstDiscoverer * dc)
1493 GstDiscovererResult res = GST_DISCOVERER_OK;
1495 GST_DEBUG ("Starting");
1498 if (dc->priv->pending_uris == NULL) {
1499 GST_WARNING ("No URI to process");
1500 res = GST_DISCOVERER_URI_INVALID;
1505 if (dc->priv->current_info != NULL) {
1506 GST_WARNING ("Already processing a file");
1507 res = GST_DISCOVERER_BUSY;
1512 g_signal_emit (dc, gst_discoverer_signals[SIGNAL_STARTING], 0);
1518 if (dc->priv->async)
1519 handle_current_async (dc);
1521 handle_current_sync (dc);
1529 * gst_discoverer_start:
1530 * @discoverer: A #GstDiscoverer
1532 * Allow asynchronous discovering of URIs to take place.
1533 * A #GMainLoop must be available for #GstDiscoverer to properly work in
1534 * asynchronous mode.
1537 gst_discoverer_start (GstDiscoverer * discoverer)
1540 GMainContext *ctx = NULL;
1542 GST_DEBUG_OBJECT (discoverer, "Starting...");
1544 if (discoverer->priv->async) {
1545 GST_DEBUG_OBJECT (discoverer, "We were already started");
1549 discoverer->priv->async = TRUE;
1550 discoverer->priv->running = TRUE;
1552 ctx = g_main_context_get_thread_default ();
1554 /* Connect to bus signals */
1556 ctx = g_main_context_default ();
1558 source = gst_bus_create_watch (discoverer->priv->bus);
1559 g_source_set_callback (source, (GSourceFunc) gst_bus_async_signal_func,
1561 discoverer->priv->sourceid = g_source_attach (source, ctx);
1562 g_source_unref (source);
1563 discoverer->priv->ctx = g_main_context_ref (ctx);
1565 start_discovering (discoverer);
1566 GST_DEBUG_OBJECT (discoverer, "Started");
1570 * gst_discoverer_stop:
1571 * @discoverer: A #GstDiscoverer
1573 * Stop the discovery of any pending URIs and clears the list of
1574 * pending URIS (if any).
1577 gst_discoverer_stop (GstDiscoverer * discoverer)
1579 GST_DEBUG_OBJECT (discoverer, "Stopping...");
1581 if (!discoverer->priv->async) {
1582 GST_DEBUG_OBJECT (discoverer,
1583 "We were already stopped, or running synchronously");
1587 DISCO_LOCK (discoverer);
1588 if (discoverer->priv->processing) {
1589 /* We prevent any further processing by setting the bus to
1590 * flushing and setting the pipeline to READY.
1591 * _reset() will take care of the rest of the cleanup */
1592 if (discoverer->priv->bus)
1593 gst_bus_set_flushing (discoverer->priv->bus, TRUE);
1594 if (discoverer->priv->pipeline)
1595 gst_element_set_state ((GstElement *) discoverer->priv->pipeline,
1598 discoverer->priv->running = FALSE;
1599 DISCO_UNLOCK (discoverer);
1601 /* Remove timeout handler */
1602 if (discoverer->priv->timeoutid) {
1603 g_source_remove (discoverer->priv->timeoutid);
1604 discoverer->priv->timeoutid = 0;
1606 /* Remove signal watch */
1607 if (discoverer->priv->sourceid) {
1608 g_source_remove (discoverer->priv->sourceid);
1609 discoverer->priv->sourceid = 0;
1611 /* Unref main context */
1612 if (discoverer->priv->ctx) {
1613 g_main_context_unref (discoverer->priv->ctx);
1614 discoverer->priv->ctx = NULL;
1616 discoverer_reset (discoverer);
1618 discoverer->priv->async = FALSE;
1620 GST_DEBUG_OBJECT (discoverer, "Stopped");
1624 * gst_discoverer_discover_uri_async:
1625 * @discoverer: A #GstDiscoverer
1626 * @uri: the URI to add.
1628 * Appends the given @uri to the list of URIs to discoverer. The actual
1629 * discovery of the @uri will only take place if gst_discoverer_start() has
1632 * A copy of @uri will be made internally, so the caller can safely g_free()
1635 * Returns: %TRUE if the @uri was successfully appended to the list of pending
1639 gst_discoverer_discover_uri_async (GstDiscoverer * discoverer,
1644 GST_DEBUG_OBJECT (discoverer, "uri : %s", uri);
1646 DISCO_LOCK (discoverer);
1647 can_run = (discoverer->priv->pending_uris == NULL);
1648 discoverer->priv->pending_uris =
1649 g_list_append (discoverer->priv->pending_uris, g_strdup (uri));
1650 DISCO_UNLOCK (discoverer);
1653 start_discovering (discoverer);
1659 /* Synchronous mode */
1661 * gst_discoverer_discover_uri:
1662 * @discoverer: A #GstDiscoverer
1663 * @uri: The URI to run on.
1664 * @err: (out) (allow-none): If an error occurred, this field will be filled in.
1666 * Synchronously discovers the given @uri.
1668 * A copy of @uri will be made internally, so the caller can safely g_free()
1671 * Returns: (transfer full): the result of the scanning. Can be %NULL if an
1675 gst_discoverer_discover_uri (GstDiscoverer * discoverer, const gchar * uri,
1678 GstDiscovererResult res = 0;
1679 GstDiscovererInfo *info;
1681 GST_DEBUG_OBJECT (discoverer, "uri:%s", uri);
1683 DISCO_LOCK (discoverer);
1684 if (G_UNLIKELY (discoverer->priv->current_info)) {
1685 DISCO_UNLOCK (discoverer);
1686 GST_WARNING_OBJECT (discoverer, "Already handling a uri");
1690 discoverer->priv->pending_uris =
1691 g_list_append (discoverer->priv->pending_uris, g_strdup (uri));
1692 DISCO_UNLOCK (discoverer);
1694 res = start_discovering (discoverer);
1695 discoverer_collect (discoverer);
1699 if (discoverer->priv->current_error)
1700 *err = g_error_copy (discoverer->priv->current_error);
1704 if (res != GST_DISCOVERER_OK) {
1705 GST_DEBUG ("Setting result to %d (was %d)", res,
1706 discoverer->priv->current_info->result);
1707 discoverer->priv->current_info->result = res;
1709 info = discoverer->priv->current_info;
1711 discoverer_cleanup (discoverer);
1717 * gst_discoverer_new:
1718 * @timeout: timeout per file, in nanoseconds. Allowed are values between
1719 * one second (#GST_SECOND) and one hour (3600 * #GST_SECOND)
1720 * @err: a pointer to a #GError. can be %NULL
1722 * Creates a new #GstDiscoverer with the provided timeout.
1724 * Returns: (transfer full): The new #GstDiscoverer.
1725 * If an error occurred when creating the discoverer, @err will be set
1726 * accordingly and %NULL will be returned. If @err is set, the caller must
1727 * free it when no longer needed using g_error_free().
1730 gst_discoverer_new (GstClockTime timeout, GError ** err)
1734 res = g_object_new (GST_TYPE_DISCOVERER, "timeout", timeout, NULL);
1735 if (res->priv->uridecodebin == NULL) {
1737 *err = g_error_new (GST_CORE_ERROR, GST_CORE_ERROR_MISSING_PLUGIN,
1738 "Couldn't create 'uridecodebin' element");
1739 gst_object_unref (res);