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-private.h"
50 #include "gst/glib-compat-private.h"
52 GST_DEBUG_CATEGORY_STATIC (discoverer_debug);
53 #define GST_CAT_DEFAULT discoverer_debug
55 static GQuark _CAPS_QUARK;
56 static GQuark _TAGS_QUARK;
57 static GQuark _TOC_QUARK;
58 static GQuark _MISSING_PLUGIN_QUARK;
59 static GQuark _STREAM_TOPOLOGY_QUARK;
60 static GQuark _TOPOLOGY_PAD_QUARK;
73 struct _GstDiscovererPrivate
77 /* allowed time to discover each uri in nanoseconds */
80 /* list of pending URI to process (current excluded) */
85 /* TRUE if processing a URI */
88 /* TRUE if discoverer has been started */
91 /* TRUE if ASYNC_DONE has been received (need to check for subtitle tags) */
95 GstDiscovererInfo *current_info;
96 GError *current_error;
97 GstStructure *current_topology;
99 /* List of private streams */
102 /* List of these sinks and their handler IDs (to remove the probe) */
103 guint pending_subtitle_pads;
105 /* Global elements */
107 GstElement *uridecodebin;
110 GType decodebin_type;
112 /* Custom main context variables */
117 /* reusable queries */
118 GstQuery *seeking_query;
120 /* Handler ids for various callbacks */
122 gulong pad_remove_id;
123 gulong source_chg_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,
156 #define DEFAULT_PROP_TIMEOUT 15 * GST_SECOND
164 static guint gst_discoverer_signals[LAST_SIGNAL] = { 0 };
166 static void gst_discoverer_set_timeout (GstDiscoverer * dc,
167 GstClockTime timeout);
168 static gboolean async_timeout_cb (GstDiscoverer * dc);
170 static void discoverer_bus_cb (GstBus * bus, GstMessage * msg,
172 static void uridecodebin_pad_added_cb (GstElement * uridecodebin, GstPad * pad,
174 static void uridecodebin_pad_removed_cb (GstElement * uridecodebin,
175 GstPad * pad, GstDiscoverer * dc);
176 static void uridecodebin_source_changed_cb (GstElement * uridecodebin,
177 GParamSpec * pspec, GstDiscoverer * dc);
179 static void gst_discoverer_dispose (GObject * dc);
180 static void gst_discoverer_set_property (GObject * object, guint prop_id,
181 const GValue * value, GParamSpec * pspec);
182 static void gst_discoverer_get_property (GObject * object, guint prop_id,
183 GValue * value, GParamSpec * pspec);
186 gst_discoverer_class_init (GstDiscovererClass * klass)
188 GObjectClass *gobject_class = (GObjectClass *) klass;
190 gobject_class->dispose = gst_discoverer_dispose;
192 gobject_class->set_property = gst_discoverer_set_property;
193 gobject_class->get_property = gst_discoverer_get_property;
195 g_type_class_add_private (klass, sizeof (GstDiscovererPrivate));
199 * GstDiscoverer:timeout:
201 * The duration (in nanoseconds) after which the discovery of an individual
204 * If the discovery of a URI times out, the %GST_DISCOVERER_TIMEOUT will be
205 * set on the result flags.
207 g_object_class_install_property (gobject_class, PROP_TIMEOUT,
208 g_param_spec_uint64 ("timeout", "timeout", "Timeout",
209 GST_SECOND, 3600 * GST_SECOND, DEFAULT_PROP_TIMEOUT,
210 G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS));
214 * GstDiscoverer::finished:
215 * @discoverer: the #GstDiscoverer
217 * Will be emitted when all pending URIs have been processed.
219 gst_discoverer_signals[SIGNAL_FINISHED] =
220 g_signal_new ("finished", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
221 G_STRUCT_OFFSET (GstDiscovererClass, finished),
222 NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0, G_TYPE_NONE);
225 * GstDiscoverer::starting:
226 * @discoverer: the #GstDiscoverer
228 * Will be emitted when the discover starts analyzing the pending URIs
230 gst_discoverer_signals[SIGNAL_STARTING] =
231 g_signal_new ("starting", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
232 G_STRUCT_OFFSET (GstDiscovererClass, starting),
233 NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0, G_TYPE_NONE);
236 * GstDiscoverer::discovered:
237 * @discoverer: the #GstDiscoverer
238 * @info: the results #GstDiscovererInfo
239 * @error: (type GLib.Error): #GError, which will be non-NULL if an error
240 * occurred during discovery. You must not
241 * free this #GError, it will be freed by
244 * Will be emitted when all information on a URI could be discovered, or
247 * When an error occurs, @info might still contain some partial information,
248 * depending on the circumstances of the error.
250 gst_discoverer_signals[SIGNAL_DISCOVERED] =
251 g_signal_new ("discovered", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
252 G_STRUCT_OFFSET (GstDiscovererClass, discovered),
253 NULL, NULL, g_cclosure_marshal_generic,
254 G_TYPE_NONE, 2, GST_TYPE_DISCOVERER_INFO,
255 G_TYPE_ERROR | G_SIGNAL_TYPE_STATIC_SCOPE);
258 * GstDiscoverer::source-setup:
259 * @discoverer: the #GstDiscoverer
260 * @source: source element
262 * This signal is emitted after the source element has been created for, so
263 * the URI being discovered, so it can be configured by setting additional
264 * properties (e.g. set a proxy server for an http source, or set the device
265 * and read speed for an audio cd source).
267 * This signal is usually emitted from the context of a GStreamer streaming
270 gst_discoverer_signals[SIGNAL_SOURCE_SETUP] =
271 g_signal_new ("source-setup", G_TYPE_FROM_CLASS (klass),
272 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDiscovererClass, source_setup),
273 NULL, NULL, g_cclosure_marshal_generic, G_TYPE_NONE, 1, GST_TYPE_ELEMENT);
277 uridecodebin_element_added_cb (GstElement * uridecodebin,
278 GstElement * child, GstDiscoverer * dc)
280 GST_DEBUG ("New element added to uridecodebin : %s",
281 GST_ELEMENT_NAME (child));
283 if (G_OBJECT_TYPE (child) == dc->priv->decodebin_type) {
284 g_object_set (child, "post-stream-topology", TRUE, NULL);
289 gst_discoverer_init (GstDiscoverer * dc)
292 GstFormat format = GST_FORMAT_TIME;
294 dc->priv = G_TYPE_INSTANCE_GET_PRIVATE (dc, GST_TYPE_DISCOVERER,
295 GstDiscovererPrivate);
297 dc->priv->timeout = DEFAULT_PROP_TIMEOUT;
298 dc->priv->async = FALSE;
299 dc->priv->async_done = FALSE;
301 dc->priv->lock = g_mutex_new ();
303 dc->priv->pending_subtitle_pads = 0;
305 GST_LOG ("Creating pipeline");
306 dc->priv->pipeline = (GstBin *) gst_pipeline_new ("Discoverer");
307 GST_LOG_OBJECT (dc, "Creating uridecodebin");
308 dc->priv->uridecodebin =
309 gst_element_factory_make ("uridecodebin", "discoverer-uri");
310 if (G_UNLIKELY (dc->priv->uridecodebin == NULL)) {
311 GST_ERROR ("Can't create uridecodebin");
314 GST_LOG_OBJECT (dc, "Adding uridecodebin to pipeline");
315 gst_bin_add (dc->priv->pipeline, dc->priv->uridecodebin);
317 dc->priv->pad_added_id =
318 g_signal_connect_object (dc->priv->uridecodebin, "pad-added",
319 G_CALLBACK (uridecodebin_pad_added_cb), dc, 0);
320 dc->priv->pad_remove_id =
321 g_signal_connect_object (dc->priv->uridecodebin, "pad-removed",
322 G_CALLBACK (uridecodebin_pad_removed_cb), dc, 0);
323 dc->priv->source_chg_id =
324 g_signal_connect_object (dc->priv->uridecodebin, "notify::source",
325 G_CALLBACK (uridecodebin_source_changed_cb), dc, 0);
327 GST_LOG_OBJECT (dc, "Getting pipeline bus");
328 dc->priv->bus = gst_pipeline_get_bus ((GstPipeline *) dc->priv->pipeline);
330 dc->priv->bus_cb_id =
331 g_signal_connect_object (dc->priv->bus, "message",
332 G_CALLBACK (discoverer_bus_cb), dc, 0);
334 GST_DEBUG_OBJECT (dc, "Done initializing Discoverer");
336 /* This is ugly. We get the GType of decodebin so we can quickly detect
337 * when a decodebin is added to uridecodebin so we can set the
338 * post-stream-topology setting to TRUE */
339 dc->priv->element_added_id =
340 g_signal_connect_object (dc->priv->uridecodebin, "element-added",
341 G_CALLBACK (uridecodebin_element_added_cb), dc, 0);
342 tmp = gst_element_factory_make ("decodebin", NULL);
343 dc->priv->decodebin_type = G_OBJECT_TYPE (tmp);
344 gst_object_unref (tmp);
347 dc->priv->seeking_query = gst_query_new_seeking (format);
351 discoverer_reset (GstDiscoverer * dc)
353 GST_DEBUG_OBJECT (dc, "Resetting");
355 if (dc->priv->pending_uris) {
356 g_list_foreach (dc->priv->pending_uris, (GFunc) g_free, NULL);
357 g_list_free (dc->priv->pending_uris);
358 dc->priv->pending_uris = NULL;
361 if (dc->priv->pipeline)
362 gst_element_set_state ((GstElement *) dc->priv->pipeline, GST_STATE_NULL);
365 #define DISCONNECT_SIGNAL(o,i) G_STMT_START{ \
366 if ((i) && g_signal_handler_is_connected ((o), (i))) \
367 g_signal_handler_disconnect ((o), (i)); \
372 gst_discoverer_dispose (GObject * obj)
374 GstDiscoverer *dc = (GstDiscoverer *) obj;
376 GST_DEBUG_OBJECT (dc, "Disposing");
378 discoverer_reset (dc);
380 if (G_LIKELY (dc->priv->pipeline)) {
381 /* Workaround for bug #118536 */
382 DISCONNECT_SIGNAL (dc->priv->uridecodebin, dc->priv->pad_added_id);
383 DISCONNECT_SIGNAL (dc->priv->uridecodebin, dc->priv->pad_remove_id);
384 DISCONNECT_SIGNAL (dc->priv->uridecodebin, dc->priv->source_chg_id);
385 DISCONNECT_SIGNAL (dc->priv->uridecodebin, dc->priv->element_added_id);
386 DISCONNECT_SIGNAL (dc->priv->bus, dc->priv->bus_cb_id);
388 /* pipeline was set to NULL in _reset */
389 gst_object_unref (dc->priv->pipeline);
390 gst_object_unref (dc->priv->bus);
392 dc->priv->pipeline = NULL;
393 dc->priv->uridecodebin = NULL;
394 dc->priv->bus = NULL;
397 gst_discoverer_stop (dc);
399 if (dc->priv->lock) {
400 g_mutex_free (dc->priv->lock);
401 dc->priv->lock = NULL;
404 if (dc->priv->seeking_query) {
405 gst_query_unref (dc->priv->seeking_query);
406 dc->priv->seeking_query = NULL;
409 G_OBJECT_CLASS (gst_discoverer_parent_class)->dispose (obj);
413 gst_discoverer_set_property (GObject * object, guint prop_id,
414 const GValue * value, GParamSpec * pspec)
416 GstDiscoverer *dc = (GstDiscoverer *) object;
420 gst_discoverer_set_timeout (dc, g_value_get_uint64 (value));
423 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
429 gst_discoverer_get_property (GObject * object, guint prop_id,
430 GValue * value, GParamSpec * pspec)
432 GstDiscoverer *dc = (GstDiscoverer *) object;
437 g_value_set_uint64 (value, dc->priv->timeout);
441 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
447 gst_discoverer_set_timeout (GstDiscoverer * dc, GstClockTime timeout)
449 GST_DEBUG_OBJECT (dc, "timeout : %" GST_TIME_FORMAT, GST_TIME_ARGS (timeout));
451 /* FIXME : update current pending timeout if we're running */
453 dc->priv->timeout = timeout;
457 static GstPadProbeReturn
458 _event_probe (GstPad * pad, GstPadProbeInfo * info, PrivateStream * ps)
460 GstEvent *event = GST_PAD_PROBE_INFO_EVENT (info);
462 if (GST_EVENT_TYPE (event) == GST_EVENT_TAG) {
463 GstTagList *tl = NULL, *tmp;
465 gst_event_parse_tag (event, &tl);
466 GST_DEBUG_OBJECT (pad, "tags %" GST_PTR_FORMAT, tl);
468 /* If preroll is complete, drop these tags - the collected information is
469 * possibly already being processed and adding more tags would be racy */
470 if (G_LIKELY (ps->dc->priv->processing)) {
471 GST_DEBUG_OBJECT (pad, "private stream %p old tags %" GST_PTR_FORMAT, ps,
473 tmp = gst_tag_list_merge (ps->tags, tl, GST_TAG_MERGE_APPEND);
475 gst_tag_list_free (ps->tags);
477 GST_DEBUG_OBJECT (pad, "private stream %p new tags %" GST_PTR_FORMAT, ps,
480 GST_DEBUG_OBJECT (pad, "Dropping tags since preroll is done");
481 DISCO_UNLOCK (ps->dc);
484 if (GST_EVENT_TYPE (event) == GST_EVENT_TOC) {
487 gst_event_parse_toc (event, &tmp, NULL);
488 GST_DEBUG_OBJECT (pad, "toc %" GST_PTR_FORMAT, tmp);
491 if (G_LIKELY (ps->dc->priv->processing)) {
492 GST_DEBUG_OBJECT (pad, "private stream %p toc %" GST_PTR_FORMAT, ps, tmp);
494 GST_DEBUG_OBJECT (pad, "Dropping toc since preroll is done");
495 DISCO_UNLOCK (ps->dc);
498 return GST_PAD_PROBE_OK;
501 static GstStaticCaps subtitle_caps = GST_STATIC_CAPS ("text/plain; "
502 "text/x-pango-markup; subpicture/x-pgs; subpicture/x-dvb; "
503 "application/x-subtitle-unknown; application/x-ssa; application/x-ass; "
504 "subtitle/x-kate; application/x-kate; video/x-dvd-subpicture");
507 is_subtitle_caps (const GstCaps * caps)
512 subs_caps = gst_static_caps_get (&subtitle_caps);
513 ret = gst_caps_can_intersect (caps, subs_caps);
514 gst_caps_unref (subs_caps);
519 static GstPadProbeReturn
520 got_subtitle_data (GstPad * pad, GstPadProbeInfo * info, GstDiscoverer * dc)
523 if (!(GST_IS_BUFFER (info->data) || (GST_IS_EVENT (info->data)
524 && GST_EVENT_TYPE ((GstEvent *) info->data) == GST_EVENT_GAP)))
525 return GST_PAD_PROBE_OK;
530 dc->priv->pending_subtitle_pads--;
532 if (dc->priv->pending_subtitle_pads == 0) {
533 GstMessage *msg = gst_message_new_application (NULL,
534 gst_structure_new_empty ("DiscovererDone"));
535 gst_element_post_message ((GstElement *) dc->priv->pipeline, msg);
539 return GST_PAD_PROBE_REMOVE;
544 uridecodebin_source_changed_cb (GstElement * uridecodebin,
545 GParamSpec * pspec, GstDiscoverer * dc)
548 /* get a handle to the source */
549 g_object_get (uridecodebin, pspec->name, &src, NULL);
551 GST_DEBUG_OBJECT (dc, "got a new source %p", src);
553 g_signal_emit (dc, gst_discoverer_signals[SIGNAL_SOURCE_SETUP], 0, src);
554 gst_object_unref (src);
558 uridecodebin_pad_added_cb (GstElement * uridecodebin, GstPad * pad,
562 GstPad *sinkpad = NULL;
565 GST_DEBUG_OBJECT (dc, "pad %s:%s", GST_DEBUG_PAD_NAME (pad));
567 ps = g_slice_new0 (PrivateStream);
571 ps->queue = gst_element_factory_make ("queue", NULL);
572 ps->sink = gst_element_factory_make ("fakesink", NULL);
574 if (G_UNLIKELY (ps->queue == NULL || ps->sink == NULL))
577 g_object_set (ps->sink, "silent", TRUE, NULL);
578 g_object_set (ps->queue, "max-size-buffers", 1, "silent", TRUE, NULL);
580 caps = gst_pad_query_caps (pad, NULL);
582 sinkpad = gst_element_get_static_pad (ps->queue, "sink");
586 if (is_subtitle_caps (caps)) {
587 /* Subtitle streams are sparse and may not provide any information - don't
588 * wait for data to preroll */
589 gst_pad_add_probe (sinkpad, GST_PAD_PROBE_TYPE_DATA_DOWNSTREAM,
590 (GstPadProbeCallback) got_subtitle_data, dc, NULL);
591 g_object_set (ps->sink, "async", FALSE, NULL);
593 dc->priv->pending_subtitle_pads++;
597 gst_caps_unref (caps);
599 gst_bin_add_many (dc->priv->pipeline, ps->queue, ps->sink, NULL);
601 if (!gst_element_link_pads_full (ps->queue, "src", ps->sink, "sink",
602 GST_PAD_LINK_CHECK_NOTHING))
604 if (!gst_element_sync_state_with_parent (ps->sink))
606 if (!gst_element_sync_state_with_parent (ps->queue))
609 if (gst_pad_link_full (pad, sinkpad,
610 GST_PAD_LINK_CHECK_NOTHING) != GST_PAD_LINK_OK)
612 gst_object_unref (sinkpad);
614 /* Add an event probe */
615 gst_pad_add_probe (pad, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM,
616 (GstPadProbeCallback) _event_probe, ps, NULL);
619 dc->priv->streams = g_list_append (dc->priv->streams, ps);
622 GST_DEBUG_OBJECT (dc, "Done handling pad");
627 GST_ERROR_OBJECT (dc, "Error while handling pad");
629 gst_object_unref (sinkpad);
631 gst_object_unref (ps->queue);
633 gst_object_unref (ps->sink);
634 g_slice_free (PrivateStream, ps);
639 uridecodebin_pad_removed_cb (GstElement * uridecodebin, GstPad * pad,
646 GST_DEBUG_OBJECT (dc, "pad %s:%s", GST_DEBUG_PAD_NAME (pad));
648 /* Find the PrivateStream */
650 for (tmp = dc->priv->streams; tmp; tmp = tmp->next) {
651 ps = (PrivateStream *) tmp->data;
658 GST_DEBUG ("The removed pad wasn't controlled by us !");
662 dc->priv->streams = g_list_delete_link (dc->priv->streams, tmp);
665 gst_element_set_state (ps->sink, GST_STATE_NULL);
666 gst_element_set_state (ps->queue, GST_STATE_NULL);
667 gst_element_unlink (ps->queue, ps->sink);
669 sinkpad = gst_element_get_static_pad (ps->queue, "sink");
670 gst_pad_unlink (pad, sinkpad);
671 gst_object_unref (sinkpad);
673 /* references removed here */
674 gst_bin_remove_many (dc->priv->pipeline, ps->sink, ps->queue, NULL);
677 gst_tag_list_free (ps->tags);
680 gst_toc_unref (ps->toc);
683 g_slice_free (PrivateStream, ps);
685 GST_DEBUG ("Done handling pad");
688 static GstStructure *
689 collect_stream_information (GstDiscoverer * dc, PrivateStream * ps, guint idx)
695 stname = g_strdup_printf ("stream-%02d", idx);
696 st = gst_structure_new_empty (stname);
700 caps = gst_pad_get_current_caps (ps->pad);
702 GST_WARNING ("Couldn't get negotiated caps from %s:%s",
703 GST_DEBUG_PAD_NAME (ps->pad));
704 caps = gst_pad_query_caps (ps->pad, NULL);
707 GST_DEBUG ("Got caps %" GST_PTR_FORMAT, caps);
708 gst_structure_id_set (st, _CAPS_QUARK, GST_TYPE_CAPS, caps, NULL);
710 gst_caps_unref (caps);
713 gst_structure_id_set (st, _TAGS_QUARK, GST_TYPE_TAG_LIST, ps->tags, NULL);
715 gst_structure_id_set (st, _TOC_QUARK, GST_TYPE_TOC, ps->toc, NULL);
720 /* takes ownership of new_tags, may replace *taglist with a new one */
722 gst_discoverer_merge_and_replace_tags (GstTagList ** taglist,
723 GstTagList * new_tags)
725 if (new_tags == NULL)
728 if (*taglist == NULL) {
733 gst_tag_list_insert (*taglist, new_tags, GST_TAG_MERGE_REPLACE);
734 gst_tag_list_free (new_tags);
737 /* Parses a set of caps and tags in st and populates a GstDiscovererStreamInfo
738 * structure (parent, if !NULL, otherwise it allocates one)
740 static GstDiscovererStreamInfo *
741 collect_information (GstDiscoverer * dc, const GstStructure * st,
742 GstDiscovererStreamInfo * parent)
745 GstStructure *caps_st;
752 if (!st || !gst_structure_id_has_field (st, _CAPS_QUARK)) {
753 GST_WARNING ("Couldn't find caps !");
755 return gst_discoverer_stream_info_ref (parent);
757 return (GstDiscovererStreamInfo *)
758 g_object_new (GST_TYPE_DISCOVERER_STREAM_INFO, NULL);
761 gst_structure_id_get (st, _CAPS_QUARK, GST_TYPE_CAPS, &caps, NULL);
762 caps_st = gst_caps_get_structure (caps, 0);
763 name = gst_structure_get_name (caps_st);
765 if (g_str_has_prefix (name, "audio/")) {
766 GstDiscovererAudioInfo *info;
769 info = (GstDiscovererAudioInfo *) gst_discoverer_stream_info_ref (parent);
771 info = (GstDiscovererAudioInfo *)
772 g_object_new (GST_TYPE_DISCOVERER_AUDIO_INFO, NULL);
773 info->parent.caps = gst_caps_ref (caps);
776 if (gst_structure_get_int (caps_st, "rate", &tmp))
777 info->sample_rate = (guint) tmp;
779 if (gst_structure_get_int (caps_st, "channels", &tmp))
780 info->channels = (guint) tmp;
782 if (gst_structure_get_int (caps_st, "depth", &tmp))
783 info->depth = (guint) tmp;
785 if (gst_structure_id_has_field (st, _TAGS_QUARK)) {
786 gst_structure_id_get (st, _TAGS_QUARK, GST_TYPE_TAG_LIST, &tags_st, NULL);
787 if (gst_tag_list_get_uint (tags_st, GST_TAG_BITRATE, &utmp) ||
788 gst_tag_list_get_uint (tags_st, GST_TAG_NOMINAL_BITRATE, &utmp))
789 info->bitrate = utmp;
791 if (gst_tag_list_get_uint (tags_st, GST_TAG_MAXIMUM_BITRATE, &utmp))
792 info->max_bitrate = utmp;
794 /* FIXME: Is it worth it to remove the tags we've parsed? */
795 gst_discoverer_merge_and_replace_tags (&info->parent.tags, tags_st);
798 if (gst_structure_id_has_field (st, _TOC_QUARK)) {
799 gst_structure_id_get (st, _TOC_QUARK, GST_TYPE_TOC, &toc_st, NULL);
800 info->parent.toc = toc_st;
803 if (!info->language && ((GstDiscovererStreamInfo *) info)->tags) {
805 if (gst_tag_list_get_string (((GstDiscovererStreamInfo *) info)->tags,
806 GST_TAG_LANGUAGE_CODE, &language)) {
807 info->language = language;
811 gst_caps_unref (caps);
812 return (GstDiscovererStreamInfo *) info;
814 } else if (g_str_has_prefix (name, "video/") ||
815 g_str_has_prefix (name, "image/")) {
816 GstDiscovererVideoInfo *info;
820 info = (GstDiscovererVideoInfo *) gst_discoverer_stream_info_ref (parent);
822 info = (GstDiscovererVideoInfo *)
823 g_object_new (GST_TYPE_DISCOVERER_VIDEO_INFO, NULL);
824 info->parent.caps = gst_caps_ref (caps);
827 if (gst_video_info_from_caps (&vinfo, caps)) {
828 info->width = (guint) vinfo.width;
829 info->height = (guint) vinfo.height;
831 info->depth = (guint) 0;
833 info->par_num = vinfo.par_n;
834 info->par_denom = vinfo.par_d;
836 info->framerate_num = vinfo.fps_n;
837 info->framerate_denom = vinfo.fps_d;
840 vinfo.interlace_mode != GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
843 if (gst_structure_id_has_field (st, _TAGS_QUARK)) {
844 gst_structure_id_get (st, _TAGS_QUARK, GST_TYPE_TAG_LIST, &tags_st, NULL);
845 if (gst_tag_list_get_uint (tags_st, GST_TAG_BITRATE, &utmp) ||
846 gst_tag_list_get_uint (tags_st, GST_TAG_NOMINAL_BITRATE, &utmp))
847 info->bitrate = utmp;
849 if (gst_tag_list_get_uint (tags_st, GST_TAG_MAXIMUM_BITRATE, &utmp))
850 info->max_bitrate = utmp;
852 /* FIXME: Is it worth it to remove the tags we've parsed? */
853 gst_discoverer_merge_and_replace_tags (&info->parent.tags,
854 (GstTagList *) tags_st);
857 if (gst_structure_id_has_field (st, _TOC_QUARK)) {
858 gst_structure_id_get (st, _TOC_QUARK, GST_TYPE_TOC, &toc_st, NULL);
859 info->parent.toc = toc_st;
862 gst_caps_unref (caps);
863 return (GstDiscovererStreamInfo *) info;
865 } else if (is_subtitle_caps (caps)) {
866 GstDiscovererSubtitleInfo *info;
870 (GstDiscovererSubtitleInfo *) gst_discoverer_stream_info_ref (parent);
872 info = (GstDiscovererSubtitleInfo *)
873 g_object_new (GST_TYPE_DISCOVERER_SUBTITLE_INFO, NULL);
874 info->parent.caps = gst_caps_ref (caps);
877 if (gst_structure_id_has_field (st, _TAGS_QUARK)) {
878 const gchar *language;
880 gst_structure_id_get (st, _TAGS_QUARK, GST_TYPE_TAG_LIST, &tags_st, NULL);
882 language = gst_structure_get_string (caps_st, GST_TAG_LANGUAGE_CODE);
884 info->language = g_strdup (language);
886 /* FIXME: Is it worth it to remove the tags we've parsed? */
887 gst_discoverer_merge_and_replace_tags (&info->parent.tags, tags_st);
890 if (gst_structure_id_has_field (st, _TOC_QUARK)) {
891 gst_structure_id_get (st, _TOC_QUARK, GST_TYPE_TOC, &toc_st, NULL);
892 info->parent.toc = toc_st;
895 if (!info->language && ((GstDiscovererStreamInfo *) info)->tags) {
897 if (gst_tag_list_get_string (((GstDiscovererStreamInfo *) info)->tags,
898 GST_TAG_LANGUAGE_CODE, &language)) {
899 info->language = language;
903 gst_caps_unref (caps);
904 return (GstDiscovererStreamInfo *) info;
907 /* None of the above - populate what information we can */
908 GstDiscovererStreamInfo *info;
911 info = gst_discoverer_stream_info_ref (parent);
913 info = (GstDiscovererStreamInfo *)
914 g_object_new (GST_TYPE_DISCOVERER_STREAM_INFO, NULL);
915 info->caps = gst_caps_ref (caps);
918 if (gst_structure_id_get (st, _TAGS_QUARK, GST_TYPE_TAG_LIST, &tags_st,
920 gst_discoverer_merge_and_replace_tags (&info->tags, tags_st);
923 if (gst_structure_id_get (st, _TOC_QUARK, GST_TYPE_TOC, &toc_st, NULL)) {
927 gst_caps_unref (caps);
933 static GstStructure *
934 find_stream_for_node (GstDiscoverer * dc, const GstStructure * topology)
937 GstPad *target_pad = NULL;
938 GstStructure *st = NULL;
943 if (!gst_structure_id_has_field (topology, _TOPOLOGY_PAD_QUARK)) {
944 GST_DEBUG ("Could not find pad for node %" GST_PTR_FORMAT, topology);
948 gst_structure_id_get (topology, _TOPOLOGY_PAD_QUARK,
949 GST_TYPE_PAD, &pad, NULL);
951 if (!dc->priv->streams) {
952 gst_object_unref (pad);
956 for (i = 0, tmp = dc->priv->streams; tmp; tmp = tmp->next, i++) {
957 ps = (PrivateStream *) tmp->data;
959 target_pad = gst_ghost_pad_get_target (GST_GHOST_PAD (ps->pad));
960 gst_object_unref (target_pad);
962 if (target_pad == pad)
967 st = collect_stream_information (dc, ps, i);
969 gst_object_unref (pad);
975 child_is_raw_stream (const GstCaps * parent, const GstCaps * child)
977 const GstStructure *st1, *st2;
978 const gchar *name1, *name2;
980 st1 = gst_caps_get_structure (parent, 0);
981 name1 = gst_structure_get_name (st1);
982 st2 = gst_caps_get_structure (child, 0);
983 name2 = gst_structure_get_name (st2);
985 if ((g_str_has_prefix (name1, "audio/") &&
986 g_str_has_prefix (name2, "audio/x-raw")) ||
987 ((g_str_has_prefix (name1, "video/") ||
988 g_str_has_prefix (name1, "image/")) &&
989 g_str_has_prefix (name2, "video/x-raw"))) {
990 /* child is the "raw" sub-stream corresponding to parent */
994 if (is_subtitle_caps (parent))
1000 /* If a parent is non-NULL, collected stream information will be appended to it
1001 * (and where the information exists, it will be overriden)
1003 static GstDiscovererStreamInfo *
1004 parse_stream_topology (GstDiscoverer * dc, const GstStructure * topology,
1005 GstDiscovererStreamInfo * parent)
1007 GstDiscovererStreamInfo *res = NULL;
1008 GstCaps *caps = NULL;
1009 const GValue *nval = NULL;
1011 GST_DEBUG ("parsing: %" GST_PTR_FORMAT, topology);
1013 nval = gst_structure_get_value (topology, "next");
1015 if (nval == NULL || GST_VALUE_HOLDS_STRUCTURE (nval)) {
1016 GstStructure *st = find_stream_for_node (dc, topology);
1017 gboolean add_to_list = TRUE;
1020 res = collect_information (dc, st, parent);
1021 gst_structure_free (st);
1023 /* Didn't find a stream structure, so let's just use the caps we have */
1024 res = collect_information (dc, topology, parent);
1028 /* FIXME : aggregate with information from main streams */
1029 GST_DEBUG ("Coudn't find 'next' ! might be the last entry");
1032 const GstStructure *st;
1034 st = gst_value_get_structure (nval);
1036 GST_DEBUG ("next is a structure %" GST_PTR_FORMAT, st);
1041 if (gst_structure_id_get (st, _CAPS_QUARK, GST_TYPE_CAPS, &caps, NULL)) {
1042 if (gst_caps_can_intersect (parent->caps, caps)) {
1043 /* We sometimes get an extra sub-stream from the parser. If this is
1044 * the case, we just replace the parent caps with this stream's caps
1045 * since they might contain more information */
1046 gst_caps_replace (&parent->caps, caps);
1048 parse_stream_topology (dc, st, parent);
1049 add_to_list = FALSE;
1050 } else if (child_is_raw_stream (parent->caps, caps)) {
1051 /* This is the "raw" stream corresponding to the parent. This
1052 * contains more information than the parent, tags etc. */
1053 parse_stream_topology (dc, st, parent);
1054 add_to_list = FALSE;
1056 GstDiscovererStreamInfo *next = parse_stream_topology (dc, st, NULL);
1058 next->previous = res;
1060 gst_caps_unref (caps);
1065 dc->priv->current_info->stream_list =
1066 g_list_append (dc->priv->current_info->stream_list, res);
1068 gst_discoverer_stream_info_unref (res);
1071 } else if (GST_VALUE_HOLDS_LIST (nval)) {
1073 GstDiscovererContainerInfo *cont;
1076 if (!gst_structure_id_get (topology, _CAPS_QUARK,
1077 GST_TYPE_CAPS, &caps, NULL))
1078 GST_WARNING ("Couldn't find caps !");
1080 len = gst_value_list_get_size (nval);
1081 GST_DEBUG ("next is a list of %d entries", len);
1083 cont = (GstDiscovererContainerInfo *)
1084 g_object_new (GST_TYPE_DISCOVERER_CONTAINER_INFO, NULL);
1085 cont->parent.caps = caps;
1086 res = (GstDiscovererStreamInfo *) cont;
1088 if (gst_structure_id_has_field (topology, _TAGS_QUARK)) {
1091 gst_structure_id_get (topology, _TAGS_QUARK,
1092 GST_TYPE_TAG_LIST, &tags, NULL);
1094 GST_DEBUG ("Merge tags %" GST_PTR_FORMAT, tags);
1097 gst_tag_list_merge (cont->parent.tags, (GstTagList *) tags,
1098 GST_TAG_MERGE_APPEND);
1099 gst_tag_list_free (tags);
1100 if (cont->parent.tags)
1101 gst_tag_list_free (cont->parent.tags);
1102 cont->parent.tags = tmp;
1103 GST_DEBUG ("Container info tags %" GST_PTR_FORMAT, tmp);
1106 for (i = 0; i < len; i++) {
1107 const GValue *subv = gst_value_list_get_value (nval, i);
1108 const GstStructure *subst = gst_value_get_structure (subv);
1109 GstDiscovererStreamInfo *substream;
1111 GST_DEBUG ("%d %" GST_PTR_FORMAT, i, subst);
1113 substream = parse_stream_topology (dc, subst, NULL);
1115 substream->previous = res;
1117 g_list_append (cont->streams,
1118 gst_discoverer_stream_info_ref (substream));
1125 /* Called when pipeline is pre-rolled */
1127 discoverer_collect (GstDiscoverer * dc)
1129 GST_DEBUG ("Collecting information");
1131 /* Stop the timeout handler if present */
1132 if (dc->priv->timeoutid) {
1133 g_source_remove (dc->priv->timeoutid);
1134 dc->priv->timeoutid = 0;
1137 if (dc->priv->streams) {
1138 /* FIXME : Make this querying optional */
1140 GstElement *pipeline = (GstElement *) dc->priv->pipeline;
1143 GST_DEBUG ("Attempting to query duration");
1145 if (gst_element_query_duration (pipeline, GST_FORMAT_TIME, &dur)) {
1146 GST_DEBUG ("Got duration %" GST_TIME_FORMAT, GST_TIME_ARGS (dur));
1147 dc->priv->current_info->duration = (guint64) dur;
1149 GstStateChangeReturn sret;
1151 /* Some parsers may not even return a rough estimate right away, e.g.
1152 * because they've only processed a single frame so far, so if we
1153 * didn't get a duration the first time, spin a bit and try again.
1154 * Ugly, but still better than making parsers or other elements return
1155 * completely bogus values. We need some API extensions to solve this
1157 GST_INFO ("No duration yet, try a bit harder..");
1158 sret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
1159 if (sret != GST_STATE_CHANGE_FAILURE) {
1162 for (i = 0; i < 2; ++i) {
1163 g_usleep (G_USEC_PER_SEC / 20);
1164 if (gst_element_query_duration (pipeline, GST_FORMAT_TIME, &dur)
1166 GST_DEBUG ("Got duration %" GST_TIME_FORMAT, GST_TIME_ARGS (dur));
1167 dc->priv->current_info->duration = (guint64) dur;
1171 gst_element_set_state (pipeline, GST_STATE_PAUSED);
1175 if (dc->priv->seeking_query) {
1176 if (gst_element_query (pipeline, dc->priv->seeking_query)) {
1180 gst_query_parse_seeking (dc->priv->seeking_query, &format,
1181 &seekable, NULL, NULL);
1182 if (format == GST_FORMAT_TIME) {
1183 GST_DEBUG ("Got seekable %d", seekable);
1184 dc->priv->current_info->seekable = seekable;
1190 if (dc->priv->current_topology)
1191 dc->priv->current_info->stream_info = parse_stream_topology (dc,
1192 dc->priv->current_topology, NULL);
1195 * Images need some special handling. They do not have a duration, have
1196 * caps named image/<foo> (th exception being MJPEG video which is also
1197 * type image/jpeg), and should consist of precisely one stream (actually
1198 * initially there are 2, the image and raw stream, but we squash these
1199 * while parsing the stream topology). At some point, if we find that these
1200 * conditions are not sufficient, we can count the number of decoders and
1201 * parsers in the chain, and if there's more than one decoder, or any
1202 * parser at all, we should not mark this as an image.
1204 if (dc->priv->current_info->duration == 0 &&
1205 dc->priv->current_info->stream_info != NULL &&
1206 dc->priv->current_info->stream_info->next == NULL) {
1208 gst_caps_get_structure (dc->priv->current_info->stream_info->caps, 0);
1210 if (g_str_has_prefix (gst_structure_get_name (st), "image/"))
1211 ((GstDiscovererVideoInfo *) dc->priv->current_info->
1212 stream_info)->is_image = TRUE;
1216 if (dc->priv->async) {
1217 GST_DEBUG ("Emitting 'discoverered'");
1218 g_signal_emit (dc, gst_discoverer_signals[SIGNAL_DISCOVERED], 0,
1219 dc->priv->current_info, dc->priv->current_error);
1220 /* Clients get a copy of current_info since it is a boxed type */
1221 gst_discoverer_info_unref (dc->priv->current_info);
1222 dc->priv->current_info = NULL;
1227 get_async_cb (gpointer cb_data, GSource * source, GSourceFunc * func,
1230 *func = (GSourceFunc) async_timeout_cb;
1234 /* Wrapper since GSourceCallbackFuncs don't expect a return value from ref() */
1236 _void_g_object_ref (gpointer object)
1238 g_object_ref (G_OBJECT (object));
1242 handle_current_async (GstDiscoverer * dc)
1245 static GSourceCallbackFuncs cb_funcs = {
1251 /* Attach a timeout to the main context */
1252 source = g_timeout_source_new (dc->priv->timeout / GST_MSECOND);
1253 g_source_set_callback_indirect (source, g_object_ref (dc), &cb_funcs);
1254 dc->priv->timeoutid = g_source_attach (source, dc->priv->ctx);
1255 g_source_unref (source);
1259 /* Returns TRUE if processing should stop */
1261 handle_message (GstDiscoverer * dc, GstMessage * msg)
1263 gboolean done = FALSE;
1265 GST_DEBUG_OBJECT (GST_MESSAGE_SRC (msg), "got a %s message",
1266 GST_MESSAGE_TYPE_NAME (msg));
1268 switch (GST_MESSAGE_TYPE (msg)) {
1269 case GST_MESSAGE_ERROR:{
1273 gst_message_parse_error (msg, &gerr, &debug);
1274 GST_WARNING_OBJECT (GST_MESSAGE_SRC (msg),
1275 "Got an error [debug:%s], [message:%s]", debug, gerr->message);
1276 dc->priv->current_error = gerr;
1279 /* We need to stop */
1282 /* Don't override missing plugin result code for missing plugin errors */
1283 if (dc->priv->current_info->result != GST_DISCOVERER_MISSING_PLUGINS ||
1284 (!g_error_matches (gerr, GST_CORE_ERROR,
1285 GST_CORE_ERROR_MISSING_PLUGIN) &&
1286 !g_error_matches (gerr, GST_STREAM_ERROR,
1287 GST_STREAM_ERROR_CODEC_NOT_FOUND))) {
1288 GST_DEBUG ("Setting result to ERROR");
1289 dc->priv->current_info->result = GST_DISCOVERER_ERROR;
1294 case GST_MESSAGE_EOS:
1295 GST_DEBUG ("Got EOS !");
1299 case GST_MESSAGE_APPLICATION:{
1301 gboolean async_done;
1302 name = gst_structure_get_name (gst_message_get_structure (msg));
1303 /* Maybe ASYNC_DONE is received & we're just waiting for subtitle tags */
1305 async_done = dc->priv->async_done;
1307 if (g_str_equal (name, "DiscovererDone") && async_done)
1312 case GST_MESSAGE_ASYNC_DONE:
1313 if (GST_MESSAGE_SRC (msg) == (GstObject *) dc->priv->pipeline) {
1314 GST_DEBUG ("Finished changing state asynchronously");
1316 if (dc->priv->pending_subtitle_pads == 0) {
1319 /* Remember that ASYNC_DONE has been received, wait for subtitles */
1320 dc->priv->async_done = TRUE;
1327 case GST_MESSAGE_ELEMENT:
1330 const GstStructure *structure;
1332 structure = gst_message_get_structure (msg);
1333 sttype = gst_structure_get_name_id (structure);
1334 GST_DEBUG_OBJECT (GST_MESSAGE_SRC (msg),
1335 "structure %" GST_PTR_FORMAT, structure);
1336 if (sttype == _MISSING_PLUGIN_QUARK) {
1337 GST_DEBUG_OBJECT (GST_MESSAGE_SRC (msg),
1338 "Setting result to MISSING_PLUGINS");
1339 dc->priv->current_info->result = GST_DISCOVERER_MISSING_PLUGINS;
1340 if (dc->priv->current_info->misc)
1341 gst_structure_free (dc->priv->current_info->misc);
1342 dc->priv->current_info->misc = gst_structure_copy (structure);
1343 } else if (sttype == _STREAM_TOPOLOGY_QUARK) {
1344 if (dc->priv->current_topology)
1345 gst_structure_free (dc->priv->current_topology);
1346 dc->priv->current_topology = gst_structure_copy (structure);
1351 case GST_MESSAGE_TAG:
1353 GstTagList *tl, *tmp;
1355 gst_message_parse_tag (msg, &tl);
1356 GST_DEBUG_OBJECT (GST_MESSAGE_SRC (msg), "Got tags %" GST_PTR_FORMAT, tl);
1357 /* Merge with current tags */
1359 gst_tag_list_merge (dc->priv->current_info->tags, tl,
1360 GST_TAG_MERGE_APPEND);
1361 gst_tag_list_free (tl);
1362 if (dc->priv->current_info->tags)
1363 gst_tag_list_free (dc->priv->current_info->tags);
1364 dc->priv->current_info->tags = tmp;
1365 GST_DEBUG_OBJECT (GST_MESSAGE_SRC (msg), "Current info %p, tags %"
1366 GST_PTR_FORMAT, dc->priv->current_info, tmp);
1370 case GST_MESSAGE_TOC:
1374 gst_message_parse_toc (msg, &tmp, NULL);
1375 GST_DEBUG_OBJECT (GST_MESSAGE_SRC (msg), "Got toc %" GST_PTR_FORMAT, tmp);
1376 dc->priv->current_info->toc = tmp;
1377 GST_DEBUG_OBJECT (GST_MESSAGE_SRC (msg), "Current info %p, toc %"
1378 GST_PTR_FORMAT, dc->priv->current_info, tmp);
1390 handle_current_sync (GstDiscoverer * dc)
1393 gdouble deadline = ((gdouble) dc->priv->timeout) / GST_SECOND;
1395 gboolean done = FALSE;
1397 timer = g_timer_new ();
1398 g_timer_start (timer);
1401 /* poll bus with timeout */
1402 /* FIXME : make the timeout more fine-tuned */
1403 if ((msg = gst_bus_timed_pop (dc->priv->bus, GST_SECOND / 2))) {
1404 done = handle_message (dc, msg);
1405 gst_message_unref (msg);
1407 } while (!done && (g_timer_elapsed (timer, NULL) < deadline));
1411 GST_DEBUG ("we timed out! Setting result to TIMEOUT");
1412 dc->priv->current_info->result = GST_DISCOVERER_TIMEOUT;
1417 g_timer_stop (timer);
1418 g_timer_destroy (timer);
1422 _setup_locked (GstDiscoverer * dc)
1424 GstStateChangeReturn ret;
1426 GST_DEBUG ("Setting up");
1428 /* Pop URI off the pending URI list */
1429 dc->priv->current_info =
1430 (GstDiscovererInfo *) g_object_new (GST_TYPE_DISCOVERER_INFO, NULL);
1431 dc->priv->current_info->uri = (gchar *) dc->priv->pending_uris->data;
1432 dc->priv->pending_uris =
1433 g_list_delete_link (dc->priv->pending_uris, dc->priv->pending_uris);
1435 /* set uri on uridecodebin */
1436 g_object_set (dc->priv->uridecodebin, "uri", dc->priv->current_info->uri,
1439 GST_DEBUG ("Current is now %s", dc->priv->current_info->uri);
1441 dc->priv->processing = TRUE;
1443 /* set pipeline to PAUSED */
1445 GST_DEBUG ("Setting pipeline to PAUSED");
1447 gst_element_set_state ((GstElement *) dc->priv->pipeline,
1451 GST_DEBUG_OBJECT (dc, "Pipeline going to PAUSED : %s",
1452 gst_element_state_change_return_get_name (ret));
1456 discoverer_cleanup (GstDiscoverer * dc)
1458 GST_DEBUG ("Cleaning up");
1460 gst_bus_set_flushing (dc->priv->bus, TRUE);
1461 gst_element_set_state ((GstElement *) dc->priv->pipeline, GST_STATE_READY);
1462 gst_bus_set_flushing (dc->priv->bus, FALSE);
1465 if (dc->priv->current_error)
1466 g_error_free (dc->priv->current_error);
1467 dc->priv->current_error = NULL;
1468 if (dc->priv->current_topology) {
1469 gst_structure_free (dc->priv->current_topology);
1470 dc->priv->current_topology = NULL;
1473 dc->priv->current_info = NULL;
1475 dc->priv->pending_subtitle_pads = 0;
1476 dc->priv->async_done = FALSE;
1478 /* Try popping the next uri */
1479 if (dc->priv->async) {
1480 if (dc->priv->pending_uris != NULL) {
1484 handle_current_async (dc);
1488 g_signal_emit (dc, gst_discoverer_signals[SIGNAL_FINISHED], 0);
1497 discoverer_bus_cb (GstBus * bus, GstMessage * msg, GstDiscoverer * dc)
1499 if (dc->priv->processing) {
1500 if (handle_message (dc, msg)) {
1501 GST_DEBUG ("Stopping asynchronously");
1502 /* Serialise with _event_probe() */
1504 dc->priv->processing = FALSE;
1506 discoverer_collect (dc);
1507 discoverer_cleanup (dc);
1513 async_timeout_cb (GstDiscoverer * dc)
1515 if (!g_source_is_destroyed (g_main_current_source ())) {
1516 dc->priv->timeoutid = 0;
1517 GST_DEBUG ("Setting result to TIMEOUT");
1518 dc->priv->current_info->result = GST_DISCOVERER_TIMEOUT;
1519 dc->priv->processing = FALSE;
1520 discoverer_collect (dc);
1521 discoverer_cleanup (dc);
1526 /* If there is a pending URI, it will pop it from the list of pending
1527 * URIs and start the discovery on it.
1529 * Returns GST_DISCOVERER_OK if the next URI was popped and is processing,
1530 * else a error flag.
1532 static GstDiscovererResult
1533 start_discovering (GstDiscoverer * dc)
1535 GstDiscovererResult res = GST_DISCOVERER_OK;
1537 GST_DEBUG ("Starting");
1540 if (dc->priv->pending_uris == NULL) {
1541 GST_WARNING ("No URI to process");
1542 res = GST_DISCOVERER_URI_INVALID;
1547 if (dc->priv->current_info != NULL) {
1548 GST_WARNING ("Already processing a file");
1549 res = GST_DISCOVERER_BUSY;
1554 g_signal_emit (dc, gst_discoverer_signals[SIGNAL_STARTING], 0);
1560 if (dc->priv->async)
1561 handle_current_async (dc);
1563 handle_current_sync (dc);
1571 * gst_discoverer_start:
1572 * @discoverer: A #GstDiscoverer
1574 * Allow asynchronous discovering of URIs to take place.
1575 * A #GMainLoop must be available for #GstDiscoverer to properly work in
1576 * asynchronous mode.
1579 gst_discoverer_start (GstDiscoverer * discoverer)
1582 GMainContext *ctx = NULL;
1584 GST_DEBUG_OBJECT (discoverer, "Starting...");
1586 if (discoverer->priv->async) {
1587 GST_DEBUG_OBJECT (discoverer, "We were already started");
1591 discoverer->priv->async = TRUE;
1592 discoverer->priv->running = TRUE;
1594 ctx = g_main_context_get_thread_default ();
1596 /* Connect to bus signals */
1598 ctx = g_main_context_default ();
1600 source = gst_bus_create_watch (discoverer->priv->bus);
1601 g_source_set_callback (source, (GSourceFunc) gst_bus_async_signal_func,
1603 discoverer->priv->sourceid = g_source_attach (source, ctx);
1604 g_source_unref (source);
1605 discoverer->priv->ctx = g_main_context_ref (ctx);
1607 start_discovering (discoverer);
1608 GST_DEBUG_OBJECT (discoverer, "Started");
1612 * gst_discoverer_stop:
1613 * @discoverer: A #GstDiscoverer
1615 * Stop the discovery of any pending URIs and clears the list of
1616 * pending URIS (if any).
1619 gst_discoverer_stop (GstDiscoverer * discoverer)
1621 GST_DEBUG_OBJECT (discoverer, "Stopping...");
1623 if (!discoverer->priv->async) {
1624 GST_DEBUG_OBJECT (discoverer,
1625 "We were already stopped, or running synchronously");
1629 DISCO_LOCK (discoverer);
1630 if (discoverer->priv->processing) {
1631 /* We prevent any further processing by setting the bus to
1632 * flushing and setting the pipeline to READY.
1633 * _reset() will take care of the rest of the cleanup */
1634 if (discoverer->priv->bus)
1635 gst_bus_set_flushing (discoverer->priv->bus, TRUE);
1636 if (discoverer->priv->pipeline)
1637 gst_element_set_state ((GstElement *) discoverer->priv->pipeline,
1640 discoverer->priv->running = FALSE;
1641 DISCO_UNLOCK (discoverer);
1643 /* Remove timeout handler */
1644 if (discoverer->priv->timeoutid) {
1645 g_source_remove (discoverer->priv->timeoutid);
1646 discoverer->priv->timeoutid = 0;
1648 /* Remove signal watch */
1649 if (discoverer->priv->sourceid) {
1650 g_source_remove (discoverer->priv->sourceid);
1651 discoverer->priv->sourceid = 0;
1653 /* Unref main context */
1654 if (discoverer->priv->ctx) {
1655 g_main_context_unref (discoverer->priv->ctx);
1656 discoverer->priv->ctx = NULL;
1658 discoverer_reset (discoverer);
1660 discoverer->priv->async = FALSE;
1662 GST_DEBUG_OBJECT (discoverer, "Stopped");
1666 * gst_discoverer_discover_uri_async:
1667 * @discoverer: A #GstDiscoverer
1668 * @uri: the URI to add.
1670 * Appends the given @uri to the list of URIs to discoverer. The actual
1671 * discovery of the @uri will only take place if gst_discoverer_start() has
1674 * A copy of @uri will be made internally, so the caller can safely g_free()
1677 * Returns: %TRUE if the @uri was successfully appended to the list of pending
1681 gst_discoverer_discover_uri_async (GstDiscoverer * discoverer,
1686 GST_DEBUG_OBJECT (discoverer, "uri : %s", uri);
1688 DISCO_LOCK (discoverer);
1689 can_run = (discoverer->priv->pending_uris == NULL);
1690 discoverer->priv->pending_uris =
1691 g_list_append (discoverer->priv->pending_uris, g_strdup (uri));
1692 DISCO_UNLOCK (discoverer);
1695 start_discovering (discoverer);
1701 /* Synchronous mode */
1703 * gst_discoverer_discover_uri:
1704 * @discoverer: A #GstDiscoverer
1705 * @uri: The URI to run on.
1706 * @err: (out) (allow-none): If an error occurred, this field will be filled in.
1708 * Synchronously discovers the given @uri.
1710 * A copy of @uri will be made internally, so the caller can safely g_free()
1713 * Returns: (transfer full): the result of the scanning. Can be %NULL if an
1717 gst_discoverer_discover_uri (GstDiscoverer * discoverer, const gchar * uri,
1720 GstDiscovererResult res = 0;
1721 GstDiscovererInfo *info;
1723 GST_DEBUG_OBJECT (discoverer, "uri:%s", uri);
1725 DISCO_LOCK (discoverer);
1726 if (G_UNLIKELY (discoverer->priv->current_info)) {
1727 DISCO_UNLOCK (discoverer);
1728 GST_WARNING_OBJECT (discoverer, "Already handling a uri");
1732 discoverer->priv->pending_uris =
1733 g_list_append (discoverer->priv->pending_uris, g_strdup (uri));
1734 DISCO_UNLOCK (discoverer);
1736 res = start_discovering (discoverer);
1737 discoverer_collect (discoverer);
1741 if (discoverer->priv->current_error)
1742 *err = g_error_copy (discoverer->priv->current_error);
1746 if (res != GST_DISCOVERER_OK) {
1747 GST_DEBUG ("Setting result to %d (was %d)", res,
1748 discoverer->priv->current_info->result);
1749 discoverer->priv->current_info->result = res;
1751 info = discoverer->priv->current_info;
1753 discoverer_cleanup (discoverer);
1759 * gst_discoverer_new:
1760 * @timeout: timeout per file, in nanoseconds. Allowed are values between
1761 * one second (#GST_SECOND) and one hour (3600 * #GST_SECOND)
1762 * @err: a pointer to a #GError. can be %NULL
1764 * Creates a new #GstDiscoverer with the provided timeout.
1766 * Returns: (transfer full): The new #GstDiscoverer.
1767 * If an error occurred when creating the discoverer, @err will be set
1768 * accordingly and %NULL will be returned. If @err is set, the caller must
1769 * free it when no longer needed using g_error_free().
1772 gst_discoverer_new (GstClockTime timeout, GError ** err)
1776 res = g_object_new (GST_TYPE_DISCOVERER, "timeout", timeout, NULL);
1777 if (res->priv->uridecodebin == NULL) {
1779 *err = g_error_new (GST_CORE_ERROR, GST_CORE_ERROR_MISSING_PLUGIN,
1780 "Couldn't create 'uridecodebin' element");
1781 gst_object_unref (res);