2 * Copyright (C) 2003 Julien Moutte <julien@moutte.net>
3 * Copyright (C) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
4 * Copyright (C) 2005 Jan Schmidt <thaytan@mad.scientist.com>
5 * Copyright (C) 2007 Wim Taymans <wim.taymans@gmail.com>
6 * Copyright (C) 2007 Andy Wingo <wingo@pobox.com>
7 * Copyright (C) 2008 Nokia Corporation. (contact <stefan.kost@nokia.com>)
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Library General Public
11 * License as published by the Free Software Foundation; either
12 * version 2 of the License, or (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Library General Public License for more details.
19 * You should have received a copy of the GNU Library General Public
20 * License along with this library; if not, write to the
21 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 * Boston, MA 02111-1307, USA.
26 * SECTION:element-input-selector
27 * @see_also: #GstOutputSelector
29 * Direct one out of N input streams to the output pad.
38 #include "gstinputselector.h"
39 #include "gstselector-marshal.h"
41 GST_DEBUG_CATEGORY_STATIC (input_selector_debug);
42 #define GST_CAT_DEFAULT input_selector_debug
44 static const GstElementDetails gst_input_selector_details =
45 GST_ELEMENT_DETAILS ("Input selector",
47 "N-to-1 input stream selectoring",
48 "Julien Moutte <julien@moutte.net>\n"
49 "Ronald S. Bultje <rbultje@ronald.bitfreak.net>\n"
50 "Jan Schmidt <thaytan@mad.scientist.com>\n"
51 "Wim Taymans <wim.taymans@gmail.com>");
53 static GstStaticPadTemplate gst_input_selector_sink_factory =
54 GST_STATIC_PAD_TEMPLATE ("sink%d",
59 static GstStaticPadTemplate gst_input_selector_src_factory =
60 GST_STATIC_PAD_TEMPLATE ("src",
74 #define DEFAULT_PAD_ALWAYS_OK TRUE
79 PROP_PAD_RUNNING_TIME,
93 static guint gst_input_selector_signals[LAST_SIGNAL] = { 0 };
95 static gboolean gst_input_selector_is_active_sinkpad (GstInputSelector * sel,
97 static GstPad *gst_input_selector_activate_sinkpad (GstInputSelector * sel,
99 static GstPad *gst_input_selector_get_linked_pad (GstPad * pad,
101 static gboolean gst_input_selector_check_eos (GstElement * selector);
103 #define GST_TYPE_SELECTOR_PAD \
104 (gst_selector_pad_get_type())
105 #define GST_SELECTOR_PAD(obj) \
106 (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_SELECTOR_PAD, GstSelectorPad))
107 #define GST_SELECTOR_PAD_CLASS(klass) \
108 (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_SELECTOR_PAD, GstSelectorPadClass))
109 #define GST_IS_SELECTOR_PAD(obj) \
110 (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_SELECTOR_PAD))
111 #define GST_IS_SELECTOR_PAD_CLASS(klass) \
112 (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_SELECTOR_PAD))
113 #define GST_SELECTOR_PAD_CAST(obj) \
114 ((GstSelectorPad *)(obj))
116 typedef struct _GstSelectorPad GstSelectorPad;
117 typedef struct _GstSelectorPadClass GstSelectorPadClass;
119 struct _GstSelectorPad
123 gboolean active; /* when buffer have passed the pad */
124 gboolean eos; /* when EOS has been received */
125 gboolean discont; /* after switching we create a discont */
127 GstSegment segment; /* the current segment on the pad */
128 GstTagList *tags; /* last tags received on the pad */
130 gboolean segment_pending;
133 struct _GstSelectorPadClass
138 static void gst_selector_pad_class_init (GstSelectorPadClass * klass);
139 static void gst_selector_pad_init (GstSelectorPad * pad);
140 static void gst_selector_pad_finalize (GObject * object);
141 static void gst_selector_pad_get_property (GObject * object,
142 guint prop_id, GValue * value, GParamSpec * pspec);
143 static void gst_selector_pad_set_property (GObject * object,
144 guint prop_id, const GValue * value, GParamSpec * pspec);
146 static GstPadClass *selector_pad_parent_class = NULL;
148 static gint64 gst_selector_pad_get_running_time (GstSelectorPad * pad);
149 static void gst_selector_pad_reset (GstSelectorPad * pad);
150 static gboolean gst_selector_pad_event (GstPad * pad, GstEvent * event);
151 static GstCaps *gst_selector_pad_getcaps (GstPad * pad);
152 static GList *gst_selector_pad_get_linked_pads (GstPad * pad);
153 static GstFlowReturn gst_selector_pad_chain (GstPad * pad, GstBuffer * buf);
154 static GstFlowReturn gst_selector_pad_bufferalloc (GstPad * pad,
155 guint64 offset, guint size, GstCaps * caps, GstBuffer ** buf);
158 gst_selector_pad_get_type (void)
160 static GType selector_pad_type = 0;
162 if (!selector_pad_type) {
163 static const GTypeInfo selector_pad_info = {
164 sizeof (GstSelectorPadClass),
167 (GClassInitFunc) gst_selector_pad_class_init,
170 sizeof (GstSelectorPad),
172 (GInstanceInitFunc) gst_selector_pad_init,
176 g_type_register_static (GST_TYPE_PAD, "GstSelectorPad",
177 &selector_pad_info, 0);
179 return selector_pad_type;
183 gst_selector_pad_class_init (GstSelectorPadClass * klass)
185 GObjectClass *gobject_class;
187 gobject_class = (GObjectClass *) klass;
189 selector_pad_parent_class = g_type_class_peek_parent (klass);
191 gobject_class->finalize = gst_selector_pad_finalize;
193 gobject_class->get_property =
194 GST_DEBUG_FUNCPTR (gst_selector_pad_get_property);
195 gobject_class->set_property =
196 GST_DEBUG_FUNCPTR (gst_selector_pad_set_property);
198 g_object_class_install_property (gobject_class, PROP_PAD_RUNNING_TIME,
199 g_param_spec_int64 ("running-time", "Running time",
200 "Running time of stream on pad", 0, G_MAXINT64, 0, G_PARAM_READABLE));
201 g_object_class_install_property (gobject_class, PROP_PAD_TAGS,
202 g_param_spec_boxed ("tags", "Tags",
203 "The currently active tags on the pad", GST_TYPE_TAG_LIST,
205 g_object_class_install_property (gobject_class, PROP_PAD_ACTIVE,
206 g_param_spec_boolean ("active", "Active",
207 "If the pad is currently active", FALSE, G_PARAM_READABLE));
208 g_object_class_install_property (gobject_class, PROP_PAD_ALWAYS_OK,
209 g_param_spec_boolean ("always-ok", "Always OK",
210 "Make an inactive pad return OK instead of NOT_LINKED",
211 DEFAULT_PAD_ALWAYS_OK, G_PARAM_READWRITE));
215 gst_selector_pad_init (GstSelectorPad * pad)
217 pad->always_ok = DEFAULT_PAD_ALWAYS_OK;
218 gst_selector_pad_reset (pad);
222 gst_selector_pad_finalize (GObject * object)
226 pad = GST_SELECTOR_PAD_CAST (object);
229 gst_tag_list_free (pad->tags);
231 G_OBJECT_CLASS (selector_pad_parent_class)->finalize (object);
235 gst_selector_pad_set_property (GObject * object, guint prop_id,
236 const GValue * value, GParamSpec * pspec)
238 GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
241 case PROP_PAD_ALWAYS_OK:
242 GST_OBJECT_LOCK (object);
243 spad->always_ok = g_value_get_boolean (value);
244 GST_OBJECT_UNLOCK (object);
247 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
253 gst_selector_pad_get_property (GObject * object, guint prop_id,
254 GValue * value, GParamSpec * pspec)
256 GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
259 case PROP_PAD_RUNNING_TIME:
260 g_value_set_int64 (value, gst_selector_pad_get_running_time (spad));
263 GST_OBJECT_LOCK (object);
264 g_value_set_boxed (value, spad->tags);
265 GST_OBJECT_UNLOCK (object);
267 case PROP_PAD_ACTIVE:
269 GstInputSelector *sel;
271 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (spad));
272 g_value_set_boolean (value, gst_input_selector_is_active_sinkpad (sel,
273 GST_PAD_CAST (spad)));
274 gst_object_unref (sel);
277 case PROP_PAD_ALWAYS_OK:
278 GST_OBJECT_LOCK (object);
279 g_value_set_boolean (value, spad->always_ok);
280 GST_OBJECT_UNLOCK (object);
283 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
289 gst_selector_pad_get_running_time (GstSelectorPad * pad)
293 GST_OBJECT_LOCK (pad);
295 gint64 last_stop = pad->segment.last_stop;
298 ret = gst_segment_to_running_time (&pad->segment, GST_FORMAT_TIME,
301 GST_OBJECT_UNLOCK (pad);
303 GST_DEBUG_OBJECT (pad, "running time: %" GST_TIME_FORMAT,
304 GST_TIME_ARGS (ret));
310 gst_selector_pad_reset (GstSelectorPad * pad)
312 GST_OBJECT_LOCK (pad);
315 pad->segment_pending = FALSE;
316 pad->discont = FALSE;
317 gst_segment_init (&pad->segment, GST_FORMAT_UNDEFINED);
318 GST_OBJECT_UNLOCK (pad);
321 /* strictly get the linked pad from the sinkpad. If the pad is active we return
322 * the srcpad else we return NULL */
324 gst_selector_pad_get_linked_pads (GstPad * pad)
328 otherpad = gst_input_selector_get_linked_pad (pad, TRUE);
332 /* need to drop the ref, internal linked pads is not MT safe */
333 gst_object_unref (otherpad);
335 return g_list_append (NULL, otherpad);
339 gst_selector_pad_event (GstPad * pad, GstEvent * event)
342 gboolean forward = TRUE;
343 GstInputSelector *sel;
344 GstSelectorPad *selpad;
345 GstPad *prev_active_sinkpad;
346 GstPad *active_sinkpad;
348 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
349 selpad = GST_SELECTOR_PAD_CAST (pad);
351 GST_INPUT_SELECTOR_LOCK (sel);
352 prev_active_sinkpad = sel->active_sinkpad;
353 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
355 /* only forward if we are dealing with the active sinkpad or if select_all
357 if (pad != active_sinkpad && !sel->select_all)
359 GST_INPUT_SELECTOR_UNLOCK (sel);
361 if (prev_active_sinkpad != active_sinkpad && pad == active_sinkpad)
362 g_object_notify (G_OBJECT (sel), "active-pad");
364 switch (GST_EVENT_TYPE (event)) {
365 case GST_EVENT_FLUSH_START:
366 /* FIXME, flush out the waiter */
368 case GST_EVENT_FLUSH_STOP:
369 GST_INPUT_SELECTOR_LOCK (sel);
370 gst_selector_pad_reset (selpad);
371 sel->pending_close = FALSE;
372 GST_INPUT_SELECTOR_UNLOCK (sel);
374 case GST_EVENT_NEWSEGMENT:
379 gint64 start, stop, time;
381 gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format,
382 &start, &stop, &time);
384 GST_DEBUG_OBJECT (pad,
385 "configured NEWSEGMENT update %d, rate %lf, applied rate %lf, "
387 "%" G_GINT64_FORMAT " -- %" G_GINT64_FORMAT ", time %"
388 G_GINT64_FORMAT, update, rate, arate, format, start, stop, time);
390 GST_INPUT_SELECTOR_LOCK (sel);
391 GST_OBJECT_LOCK (selpad);
392 gst_segment_set_newsegment_full (&selpad->segment, update,
393 rate, arate, format, start, stop, time);
394 GST_OBJECT_UNLOCK (selpad);
396 /* If we aren't forwarding the event (because the pad is not the
397 * active_sinkpad, and select_all is not set, then set the flag on the
398 * that says a segment needs sending if/when that pad is activated.
399 * For all other cases, we send the event immediately, which makes
400 * sparse streams and other segment updates work correctly downstream.
403 selpad->segment_pending = TRUE;
405 GST_INPUT_SELECTOR_UNLOCK (sel);
410 GstTagList *tags, *oldtags, *newtags;
412 gst_event_parse_tag (event, &tags);
414 GST_OBJECT_LOCK (selpad);
415 oldtags = selpad->tags;
417 newtags = gst_tag_list_merge (oldtags, tags, GST_TAG_MERGE_REPLACE);
418 selpad->tags = newtags;
420 gst_tag_list_free (oldtags);
421 GST_DEBUG_OBJECT (pad, "received tags %" GST_PTR_FORMAT, newtags);
422 GST_OBJECT_UNLOCK (selpad);
427 GST_DEBUG_OBJECT (pad, "received EOS");
428 /* don't forward eos in select_all mode until all sink pads have eos */
429 if (sel->select_all && !gst_input_selector_check_eos (GST_ELEMENT (sel))) {
437 GST_DEBUG_OBJECT (pad, "forwarding event");
438 res = gst_pad_push_event (sel->srcpad, event);
440 gst_event_unref (event);
442 gst_object_unref (sel);
448 gst_selector_pad_getcaps (GstPad * pad)
450 GstInputSelector *sel;
453 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
455 GST_DEBUG_OBJECT (sel, "Getting caps of srcpad peer");
456 caps = gst_pad_peer_get_caps (sel->srcpad);
458 caps = gst_caps_new_any ();
460 gst_object_unref (sel);
466 gst_selector_pad_bufferalloc (GstPad * pad, guint64 offset,
467 guint size, GstCaps * caps, GstBuffer ** buf)
469 GstInputSelector *sel;
470 GstFlowReturn result;
471 GstPad *active_sinkpad;
472 GstPad *prev_active_sinkpad;
473 GstSelectorPad *selpad;
475 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
476 selpad = GST_SELECTOR_PAD_CAST (pad);
478 GST_DEBUG_OBJECT (pad, "received alloc");
480 GST_INPUT_SELECTOR_LOCK (sel);
481 prev_active_sinkpad = sel->active_sinkpad;
482 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
484 if (pad != active_sinkpad)
487 GST_INPUT_SELECTOR_UNLOCK (sel);
489 if (prev_active_sinkpad != active_sinkpad && pad == active_sinkpad)
490 g_object_notify (G_OBJECT (sel), "active-pad");
492 result = gst_pad_alloc_buffer (sel->srcpad, offset, size, caps, buf);
495 gst_object_unref (sel);
502 GST_INPUT_SELECTOR_UNLOCK (sel);
504 /* unselected pad, perform fallback alloc or return unlinked when
506 GST_OBJECT_LOCK (selpad);
507 if (selpad->always_ok) {
508 GST_DEBUG_OBJECT (pad, "Not selected, performing fallback allocation");
510 result = GST_FLOW_OK;
512 GST_DEBUG_OBJECT (pad, "Not selected, return NOT_LINKED");
513 result = GST_FLOW_NOT_LINKED;
515 GST_OBJECT_UNLOCK (selpad);
521 /* must be called with the SELECTOR_LOCK, will block while the pad is blocked
522 * or return TRUE when flushing */
524 gst_input_selector_wait (GstInputSelector * self, GstPad * pad)
526 while (self->blocked && !self->flushing) {
527 /* we can be unlocked here when we are shutting down (flushing) or when we
529 GST_INPUT_SELECTOR_WAIT (self);
531 return self->flushing;
535 gst_selector_pad_chain (GstPad * pad, GstBuffer * buf)
537 GstInputSelector *sel;
539 GstPad *active_sinkpad;
540 GstPad *prev_active_sinkpad;
541 GstSelectorPad *selpad;
542 GstClockTime end_time, duration;
544 GstEvent *close_event = NULL, *start_event = NULL;
546 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
547 selpad = GST_SELECTOR_PAD_CAST (pad);
548 seg = &selpad->segment;
550 GST_INPUT_SELECTOR_LOCK (sel);
551 /* wait or check for flushing */
552 if (gst_input_selector_wait (sel, pad))
555 GST_DEBUG_OBJECT (pad, "getting active pad");
557 prev_active_sinkpad = sel->active_sinkpad;
558 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
560 /* update the segment on the srcpad */
561 end_time = GST_BUFFER_TIMESTAMP (buf);
562 if (GST_CLOCK_TIME_IS_VALID (end_time)) {
563 duration = GST_BUFFER_DURATION (buf);
564 if (GST_CLOCK_TIME_IS_VALID (duration))
565 end_time += duration;
566 GST_DEBUG_OBJECT (pad, "received end time %" GST_TIME_FORMAT,
567 GST_TIME_ARGS (end_time));
569 GST_OBJECT_LOCK (pad);
570 gst_segment_set_last_stop (seg, seg->format, end_time);
571 GST_OBJECT_UNLOCK (pad);
574 /* Ignore buffers from pads except the selected one */
575 if (pad != active_sinkpad)
578 if (G_UNLIKELY (sel->pending_close)) {
579 GstSegment *cseg = &sel->segment;
581 GST_DEBUG_OBJECT (sel,
582 "pushing NEWSEGMENT update %d, rate %lf, applied rate %lf, "
584 "%" G_GINT64_FORMAT " -- %" G_GINT64_FORMAT ", time %"
585 G_GINT64_FORMAT, TRUE, cseg->rate, cseg->applied_rate, cseg->format,
586 cseg->start, cseg->stop, cseg->time);
588 /* create update segment */
589 close_event = gst_event_new_new_segment_full (TRUE, cseg->rate,
590 cseg->applied_rate, cseg->format, cseg->start, cseg->stop, cseg->time);
592 sel->pending_close = FALSE;
594 /* if we have a pending segment, push it out now */
595 if (G_UNLIKELY (selpad->segment_pending)) {
596 GST_DEBUG_OBJECT (pad,
597 "pushing NEWSEGMENT update %d, rate %lf, applied rate %lf, "
599 "%" G_GINT64_FORMAT " -- %" G_GINT64_FORMAT ", time %"
600 G_GINT64_FORMAT, FALSE, seg->rate, seg->applied_rate, seg->format,
601 seg->start, seg->stop, seg->time);
603 start_event = gst_event_new_new_segment_full (FALSE, seg->rate,
604 seg->applied_rate, seg->format, seg->start, seg->stop, seg->time);
606 selpad->segment_pending = FALSE;
608 GST_INPUT_SELECTOR_UNLOCK (sel);
610 if (prev_active_sinkpad != active_sinkpad && pad == active_sinkpad)
611 g_object_notify (G_OBJECT (sel), "active-pad");
614 gst_pad_push_event (sel->srcpad, close_event);
617 gst_pad_push_event (sel->srcpad, start_event);
619 if (selpad->discont) {
620 buf = gst_buffer_make_metadata_writable (buf);
622 GST_DEBUG_OBJECT (pad, "Marking discont buffer %p", buf);
623 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
624 selpad->discont = FALSE;
628 GST_DEBUG_OBJECT (pad, "Forwarding buffer %p from pad %s:%s", buf,
629 GST_DEBUG_PAD_NAME (pad));
631 res = gst_pad_push (sel->srcpad, buf);
634 gst_object_unref (sel);
637 /* dropped buffers */
640 GST_DEBUG_OBJECT (pad, "Pad not active, discard buffer %p", buf);
641 /* when we drop a buffer, we're creating a discont on this pad */
642 selpad->discont = TRUE;
643 GST_INPUT_SELECTOR_UNLOCK (sel);
644 gst_buffer_unref (buf);
646 /* figure out what to return upstream */
647 GST_OBJECT_LOCK (selpad);
648 if (selpad->always_ok)
651 res = GST_FLOW_NOT_LINKED;
652 GST_OBJECT_UNLOCK (selpad);
658 GST_DEBUG_OBJECT (pad, "We are flushing, discard buffer %p", buf);
659 GST_INPUT_SELECTOR_UNLOCK (sel);
660 gst_buffer_unref (buf);
661 res = GST_FLOW_WRONG_STATE;
666 static void gst_input_selector_init (GstInputSelector * sel);
667 static void gst_input_selector_base_init (GstInputSelectorClass * klass);
668 static void gst_input_selector_class_init (GstInputSelectorClass * klass);
670 static void gst_input_selector_dispose (GObject * object);
672 static void gst_input_selector_set_property (GObject * object,
673 guint prop_id, const GValue * value, GParamSpec * pspec);
674 static void gst_input_selector_get_property (GObject * object,
675 guint prop_id, GValue * value, GParamSpec * pspec);
677 static GstPad *gst_input_selector_request_new_pad (GstElement * element,
678 GstPadTemplate * templ, const gchar * unused);
679 static void gst_input_selector_release_pad (GstElement * element, GstPad * pad);
681 static GstStateChangeReturn gst_input_selector_change_state (GstElement *
682 element, GstStateChange transition);
684 static GstCaps *gst_input_selector_getcaps (GstPad * pad);
685 static gboolean gst_input_selector_event (GstPad * pad, GstEvent * event);
686 static gboolean gst_input_selector_query (GstPad * pad, GstQuery * query);
687 static gint64 gst_input_selector_block (GstInputSelector * self);
688 static void gst_input_selector_switch (GstInputSelector * self,
689 GstPad * pad, gint64 stop_time, gint64 start_time);
691 static GstElementClass *parent_class = NULL;
694 gst_input_selector_get_type (void)
696 static GType input_selector_type = 0;
698 if (!input_selector_type) {
699 static const GTypeInfo input_selector_info = {
700 sizeof (GstInputSelectorClass),
701 (GBaseInitFunc) gst_input_selector_base_init,
703 (GClassInitFunc) gst_input_selector_class_init,
706 sizeof (GstInputSelector),
708 (GInstanceInitFunc) gst_input_selector_init,
710 input_selector_type =
711 g_type_register_static (GST_TYPE_ELEMENT,
712 "GstInputSelector", &input_selector_info, 0);
713 GST_DEBUG_CATEGORY_INIT (input_selector_debug,
714 "input-selector", 0, "An input stream selector element");
717 return input_selector_type;
721 gst_input_selector_base_init (GstInputSelectorClass * klass)
723 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
725 gst_element_class_set_details (element_class, &gst_input_selector_details);
726 gst_element_class_add_pad_template (element_class,
727 gst_static_pad_template_get (&gst_input_selector_sink_factory));
728 gst_element_class_add_pad_template (element_class,
729 gst_static_pad_template_get (&gst_input_selector_src_factory));
733 gst_input_selector_class_init (GstInputSelectorClass * klass)
735 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
736 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
738 parent_class = g_type_class_peek_parent (klass);
740 gobject_class->dispose = gst_input_selector_dispose;
742 gobject_class->set_property =
743 GST_DEBUG_FUNCPTR (gst_input_selector_set_property);
744 gobject_class->get_property =
745 GST_DEBUG_FUNCPTR (gst_input_selector_get_property);
747 g_object_class_install_property (gobject_class, PROP_N_PADS,
748 g_param_spec_uint ("n-pads", "Number of Pads",
749 "The number of sink pads", 0, G_MAXUINT, 0, G_PARAM_READABLE));
751 g_object_class_install_property (gobject_class, PROP_ACTIVE_PAD,
752 g_param_spec_object ("active-pad", "Active pad",
753 "The currently active sink pad", GST_TYPE_PAD, G_PARAM_READWRITE));
755 g_object_class_install_property (gobject_class, PROP_SELECT_ALL,
756 g_param_spec_boolean ("select-all", "Select all mode",
757 "Forwards data from all input pads", FALSE, G_PARAM_READWRITE));
760 * GstInputSelector::block:
761 * @inputselector: the #GstInputSelector
763 * Block all sink pads in preparation for a switch. Returns the stop time of
764 * the current switch segment, as a running time, or 0 if there is no current
765 * active pad or the current active pad never received data.
767 gst_input_selector_signals[SIGNAL_BLOCK] =
768 g_signal_new ("block", G_TYPE_FROM_CLASS (klass),
769 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
770 G_STRUCT_OFFSET (GstInputSelectorClass, block), NULL, NULL,
771 gst_selector_marshal_INT64__VOID, G_TYPE_INT64, 0);
773 * GstInputSelector::switch:
774 * @inputselector: the #GstInputSelector
775 * @pad: the pad to switch to
776 * @stop_time: running time at which to close the previous segment, or -1
777 * to use the running time of the previously active sink pad
778 * @start_time: running time at which to start the new segment, or -1 to
779 * use the running time of the newly active sink pad
781 * Switch to a new feed. The segment opened by the previously active pad, if
782 * any, will be closed, and a new segment opened before data flows again.
784 * This signal must be emitted when the element has been blocked via the <link
785 * linkend="GstInputSelector-block">block</link> signal.
787 * If you have a stream with only one switch element, such as an audio-only
788 * stream, a stream switch should be performed by first emitting the block
789 * signal, and then emitting the switch signal with -1 for the stop and start
792 * The intention of the @stop_time and @start_time arguments is to allow
793 * multiple switch elements to switch and maintain stream synchronization.
794 * When switching a stream with multiple feeds, you will need as many switch
795 * elements as you have feeds. For example, a feed with audio and video will
796 * have one switch element between the audio feeds and one for video.
798 * A switch over multiple switch elements should be performed as follows:
799 * First, emit the <link linkend="GstInputSelector-block">block</link>
800 * signal, collecting the returned values. The maximum running time returned
801 * by block should then be used as the time at which to close the previous
804 * Then, query the running times of the new audio and video pads that you will
805 * switch to. Naturally, these pads are on separate switch elements. Take the
806 * minimum running time for those streams and use it for the time at which to
807 * open the new segment.
809 * If @pad is the same as the current active pad, the element will cancel any
810 * previous block without adjusting segments.
813 * the signal changed from accepting the pad name to the pad object.
818 gst_input_selector_signals[SIGNAL_SWITCH] =
819 g_signal_new ("switch", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
820 G_STRUCT_OFFSET (GstInputSelectorClass, switch_),
821 NULL, NULL, gst_selector_marshal_VOID__OBJECT_INT64_INT64,
822 G_TYPE_NONE, 3, GST_TYPE_PAD, G_TYPE_INT64, G_TYPE_INT64);
824 gstelement_class->request_new_pad = gst_input_selector_request_new_pad;
825 gstelement_class->release_pad = gst_input_selector_release_pad;
826 gstelement_class->change_state = gst_input_selector_change_state;
828 klass->block = GST_DEBUG_FUNCPTR (gst_input_selector_block);
829 /* note the underscore because switch is a keyword otherwise */
830 klass->switch_ = GST_DEBUG_FUNCPTR (gst_input_selector_switch);
834 gst_input_selector_init (GstInputSelector * sel)
836 sel->srcpad = gst_pad_new ("src", GST_PAD_SRC);
837 gst_pad_set_internal_link_function (sel->srcpad,
838 GST_DEBUG_FUNCPTR (gst_selector_pad_get_linked_pads));
839 gst_pad_set_getcaps_function (sel->srcpad,
840 GST_DEBUG_FUNCPTR (gst_input_selector_getcaps));
841 gst_pad_set_query_function (sel->srcpad,
842 GST_DEBUG_FUNCPTR (gst_input_selector_query));
843 gst_pad_set_event_function (sel->srcpad,
844 GST_DEBUG_FUNCPTR (gst_input_selector_event));
845 gst_element_add_pad (GST_ELEMENT (sel), sel->srcpad);
846 /* sinkpad management */
847 sel->active_sinkpad = NULL;
849 gst_segment_init (&sel->segment, GST_FORMAT_UNDEFINED);
851 sel->lock = g_mutex_new ();
852 sel->cond = g_cond_new ();
853 sel->blocked = FALSE;
855 sel->select_all = FALSE;
859 gst_input_selector_dispose (GObject * object)
861 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
863 if (sel->active_sinkpad) {
864 gst_object_unref (sel->active_sinkpad);
865 sel->active_sinkpad = NULL;
868 g_mutex_free (sel->lock);
872 g_cond_free (sel->cond);
876 G_OBJECT_CLASS (parent_class)->dispose (object);
879 /* Solve the following equation for B.timestamp, and set that as the segment
881 * B.running_time = (B.timestamp - NS.start) / NS.abs_rate + NS.accum
884 gst_segment_get_timestamp (GstSegment * segment, gint64 running_time)
886 return (running_time - segment->accum) * segment->abs_rate + segment->start;
890 gst_segment_set_stop (GstSegment * segment, gint64 running_time)
892 segment->stop = gst_segment_get_timestamp (segment, running_time);
893 segment->last_stop = -1;
897 gst_segment_set_start (GstSegment * segment, gint64 running_time)
899 gint64 new_start, duration;
901 new_start = gst_segment_get_timestamp (segment, running_time);
903 /* this is the duration we skipped */
904 duration = new_start - segment->start;
905 /* add the duration to the accumulated segment time */
906 segment->accum += duration;
907 /* move position in the segment */
908 segment->time += duration;
909 segment->start += duration;
912 /* this function must be called with the SELECTOR_LOCK. It returns TRUE when the
913 * active pad changed. */
915 gst_input_selector_set_active_pad (GstInputSelector * self,
916 GstPad * pad, gint64 stop_time, gint64 start_time)
918 GstSelectorPad *old, *new;
919 GstPad **active_pad_p;
921 if (pad == self->active_sinkpad)
924 old = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
925 new = GST_SELECTOR_PAD_CAST (pad);
927 GST_DEBUG_OBJECT (self, "setting active pad to %s:%s",
928 GST_DEBUG_PAD_NAME (new));
930 if (stop_time == -1 && old) {
931 /* no stop time given, get the latest running_time on the active pad to
932 * close and open the new segment */
933 stop_time = start_time = gst_selector_pad_get_running_time (old);
934 GST_DEBUG_OBJECT (self, "using start/stop of %" G_GINT64_FORMAT,
938 if (old && old->active && !self->pending_close && stop_time >= 0) {
939 /* schedule a last_stop update if one isn't already scheduled, and a
940 segment has been pushed before. */
941 memcpy (&self->segment, &old->segment, sizeof (self->segment));
943 GST_DEBUG_OBJECT (self, "setting stop_time to %" G_GINT64_FORMAT,
945 gst_segment_set_stop (&self->segment, stop_time);
946 self->pending_close = TRUE;
949 if (new && new->active && start_time >= 0) {
950 GST_DEBUG_OBJECT (self, "setting start_time to %" G_GINT64_FORMAT,
952 /* schedule a new segment push */
953 gst_segment_set_start (&new->segment, start_time);
954 new->segment_pending = TRUE;
957 active_pad_p = &self->active_sinkpad;
958 gst_object_replace ((GstObject **) active_pad_p, GST_OBJECT_CAST (pad));
959 GST_DEBUG_OBJECT (self, "New active pad is %" GST_PTR_FORMAT,
960 self->active_sinkpad);
966 gst_input_selector_set_property (GObject * object, guint prop_id,
967 const GValue * value, GParamSpec * pspec)
969 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
972 case PROP_ACTIVE_PAD:
976 pad = g_value_get_object (value);
978 GST_INPUT_SELECTOR_LOCK (sel);
979 gst_input_selector_set_active_pad (sel, pad,
980 GST_CLOCK_TIME_NONE, GST_CLOCK_TIME_NONE);
981 GST_INPUT_SELECTOR_UNLOCK (sel);
984 case PROP_SELECT_ALL:
985 GST_INPUT_SELECTOR_LOCK (object);
986 sel->select_all = g_value_get_boolean (value);
987 GST_INPUT_SELECTOR_UNLOCK (object);
990 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
996 gst_input_selector_get_property (GObject * object, guint prop_id,
997 GValue * value, GParamSpec * pspec)
999 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1003 GST_INPUT_SELECTOR_LOCK (object);
1004 g_value_set_uint (value, sel->n_pads);
1005 GST_INPUT_SELECTOR_UNLOCK (object);
1007 case PROP_ACTIVE_PAD:
1008 GST_INPUT_SELECTOR_LOCK (object);
1009 g_value_set_object (value, sel->active_sinkpad);
1010 GST_INPUT_SELECTOR_UNLOCK (object);
1012 case PROP_SELECT_ALL:
1013 GST_INPUT_SELECTOR_LOCK (object);
1014 g_value_set_boolean (value, sel->select_all);
1015 GST_INPUT_SELECTOR_UNLOCK (object);
1018 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1024 gst_input_selector_get_linked_pad (GstPad * pad, gboolean strict)
1026 GstInputSelector *sel;
1027 GstPad *otherpad = NULL;
1029 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
1031 GST_INPUT_SELECTOR_LOCK (sel);
1032 if (pad == sel->srcpad)
1033 otherpad = sel->active_sinkpad;
1034 else if (pad == sel->active_sinkpad || !strict)
1035 otherpad = sel->srcpad;
1037 gst_object_ref (otherpad);
1038 GST_INPUT_SELECTOR_UNLOCK (sel);
1040 gst_object_unref (sel);
1046 gst_input_selector_event (GstPad * pad, GstEvent * event)
1048 gboolean res = FALSE;
1051 otherpad = gst_input_selector_get_linked_pad (pad, TRUE);
1054 res = gst_pad_push_event (otherpad, event);
1056 gst_object_unref (otherpad);
1058 gst_event_unref (event);
1062 /* query on the srcpad. We override this function because by default it will
1063 * only forward the query to one random sinkpad */
1065 gst_input_selector_query (GstPad * pad, GstQuery * query)
1067 gboolean res = TRUE;
1068 GstInputSelector *sel;
1071 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
1073 otherpad = gst_input_selector_get_linked_pad (pad, TRUE);
1075 switch (GST_QUERY_TYPE (query)) {
1076 case GST_QUERY_LATENCY:
1079 GstClockTime resmin, resmax;
1086 /* assume FALSE, we become TRUE if one query succeeds */
1089 /* perform the query on all sinkpads and combine the results. We take the
1090 * max of min and the min of max for the result latency. */
1091 GST_INPUT_SELECTOR_LOCK (sel);
1092 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk;
1093 walk = g_list_next (walk)) {
1094 GstPad *sinkpad = GST_PAD_CAST (walk->data);
1096 if (gst_pad_peer_query (sinkpad, query)) {
1097 GstClockTime min, max;
1100 /* one query succeeded, we succeed too */
1103 gst_query_parse_latency (query, &live, &min, &max);
1105 GST_DEBUG_OBJECT (sinkpad,
1106 "peer latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
1107 ", live %d", GST_TIME_ARGS (min), GST_TIME_ARGS (max), live);
1114 else if (max < resmax)
1116 if (reslive == FALSE)
1121 GST_INPUT_SELECTOR_UNLOCK (sel);
1123 gst_query_set_latency (query, reslive, resmin, resmax);
1125 GST_DEBUG_OBJECT (sel,
1126 "total latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
1127 ", live %d", GST_TIME_ARGS (resmin), GST_TIME_ARGS (resmax),
1135 res = gst_pad_peer_query (otherpad, query);
1139 gst_object_unref (otherpad);
1140 gst_object_unref (sel);
1146 gst_input_selector_getcaps (GstPad * pad)
1152 parent = gst_object_get_parent (GST_OBJECT (pad));
1154 otherpad = gst_input_selector_get_linked_pad (pad, FALSE);
1157 if (GST_INPUT_SELECTOR (parent)->select_all) {
1158 GST_DEBUG_OBJECT (parent,
1159 "Pad %s:%s not linked, returning merge of caps",
1160 GST_DEBUG_PAD_NAME (pad));
1161 caps = gst_pad_proxy_getcaps (pad);
1163 GST_DEBUG_OBJECT (parent,
1164 "Pad %s:%s not linked, returning ANY", GST_DEBUG_PAD_NAME (pad));
1165 caps = gst_caps_new_any ();
1168 GST_DEBUG_OBJECT (parent,
1169 "Pad %s:%s is linked (to %s:%s), returning peer caps",
1170 GST_DEBUG_PAD_NAME (pad), GST_DEBUG_PAD_NAME (otherpad));
1171 /* if the peer has caps, use those. If the pad is not linked, this function
1172 * returns NULL and we return ANY */
1173 if (!(caps = gst_pad_peer_get_caps (otherpad)))
1174 caps = gst_caps_new_any ();
1175 gst_object_unref (otherpad);
1178 gst_object_unref (parent);
1182 /* check if the pad is the active sinkpad */
1184 gst_input_selector_is_active_sinkpad (GstInputSelector * sel, GstPad * pad)
1186 GstSelectorPad *selpad;
1189 selpad = GST_SELECTOR_PAD_CAST (pad);
1191 GST_INPUT_SELECTOR_LOCK (sel);
1192 res = (pad == sel->active_sinkpad);
1193 GST_INPUT_SELECTOR_UNLOCK (sel);
1198 /* Get or create the active sinkpad, must be called with SELECTOR_LOCK */
1200 gst_input_selector_activate_sinkpad (GstInputSelector * sel, GstPad * pad)
1202 GstPad *active_sinkpad;
1203 GstSelectorPad *selpad;
1205 selpad = GST_SELECTOR_PAD_CAST (pad);
1207 selpad->active = TRUE;
1208 active_sinkpad = sel->active_sinkpad;
1209 if (active_sinkpad == NULL || sel->select_all) {
1210 /* first pad we get activity on becomes the activated pad by default, if we
1211 * select all, we also remember the last used pad. */
1212 if (sel->active_sinkpad)
1213 gst_object_unref (sel->active_sinkpad);
1214 active_sinkpad = sel->active_sinkpad = gst_object_ref (pad);
1215 GST_DEBUG_OBJECT (sel, "Activating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1218 return active_sinkpad;
1222 gst_input_selector_request_new_pad (GstElement * element,
1223 GstPadTemplate * templ, const gchar * unused)
1225 GstInputSelector *sel;
1227 GstPad *sinkpad = NULL;
1229 g_return_val_if_fail (templ->direction == GST_PAD_SINK, NULL);
1231 sel = GST_INPUT_SELECTOR (element);
1233 GST_INPUT_SELECTOR_LOCK (sel);
1235 GST_LOG_OBJECT (sel, "Creating new pad %d", sel->padcount);
1236 name = g_strdup_printf ("sink%d", sel->padcount++);
1237 sinkpad = g_object_new (GST_TYPE_SELECTOR_PAD,
1238 "name", name, "direction", templ->direction, "template", templ, NULL);
1243 gst_pad_set_event_function (sinkpad,
1244 GST_DEBUG_FUNCPTR (gst_selector_pad_event));
1245 gst_pad_set_getcaps_function (sinkpad,
1246 GST_DEBUG_FUNCPTR (gst_selector_pad_getcaps));
1247 gst_pad_set_chain_function (sinkpad,
1248 GST_DEBUG_FUNCPTR (gst_selector_pad_chain));
1249 gst_pad_set_internal_link_function (sinkpad,
1250 GST_DEBUG_FUNCPTR (gst_selector_pad_get_linked_pads));
1251 gst_pad_set_bufferalloc_function (sinkpad,
1252 GST_DEBUG_FUNCPTR (gst_selector_pad_bufferalloc));
1254 gst_pad_set_active (sinkpad, TRUE);
1255 gst_element_add_pad (GST_ELEMENT (sel), sinkpad);
1256 GST_INPUT_SELECTOR_UNLOCK (sel);
1262 gst_input_selector_release_pad (GstElement * element, GstPad * pad)
1264 GstInputSelector *sel;
1266 sel = GST_INPUT_SELECTOR (element);
1267 GST_LOG_OBJECT (sel, "Releasing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1269 GST_INPUT_SELECTOR_LOCK (sel);
1270 /* if the pad was the active pad, makes us select a new one */
1271 if (sel->active_sinkpad == pad) {
1272 GST_DEBUG_OBJECT (sel, "Deactivating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1273 gst_object_unref (sel->active_sinkpad);
1274 sel->active_sinkpad = NULL;
1278 gst_pad_set_active (pad, FALSE);
1279 gst_element_remove_pad (GST_ELEMENT (sel), pad);
1280 GST_INPUT_SELECTOR_UNLOCK (sel);
1284 gst_input_selector_reset (GstInputSelector * sel)
1288 GST_INPUT_SELECTOR_LOCK (sel);
1289 /* clear active pad */
1290 if (sel->active_sinkpad) {
1291 gst_object_unref (sel->active_sinkpad);
1292 sel->active_sinkpad = NULL;
1295 gst_segment_init (&sel->segment, GST_FORMAT_UNDEFINED);
1296 sel->pending_close = FALSE;
1297 /* reset each of our sinkpads state */
1298 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
1299 GstSelectorPad *selpad = GST_SELECTOR_PAD_CAST (walk->data);
1301 gst_selector_pad_reset (selpad);
1304 gst_tag_list_free (selpad->tags);
1305 selpad->tags = NULL;
1308 GST_INPUT_SELECTOR_UNLOCK (sel);
1311 static GstStateChangeReturn
1312 gst_input_selector_change_state (GstElement * element,
1313 GstStateChange transition)
1315 GstInputSelector *self = GST_INPUT_SELECTOR (element);
1316 GstStateChangeReturn result;
1318 switch (transition) {
1319 case GST_STATE_CHANGE_READY_TO_PAUSED:
1320 GST_INPUT_SELECTOR_LOCK (self);
1321 self->blocked = FALSE;
1322 self->flushing = FALSE;
1323 GST_INPUT_SELECTOR_UNLOCK (self);
1325 case GST_STATE_CHANGE_PAUSED_TO_READY:
1326 /* first unlock before we call the parent state change function, which
1327 * tries to acquire the stream lock when going to ready. */
1328 GST_INPUT_SELECTOR_LOCK (self);
1329 self->blocked = FALSE;
1330 self->flushing = TRUE;
1331 GST_INPUT_SELECTOR_BROADCAST (self);
1332 GST_INPUT_SELECTOR_UNLOCK (self);
1338 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1340 switch (transition) {
1341 case GST_STATE_CHANGE_PAUSED_TO_READY:
1342 gst_input_selector_reset (self);
1352 gst_input_selector_block (GstInputSelector * self)
1355 GstSelectorPad *spad;
1357 GST_INPUT_SELECTOR_LOCK (self);
1360 GST_WARNING_OBJECT (self, "switch already blocked");
1362 self->blocked = TRUE;
1363 spad = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
1366 ret = gst_selector_pad_get_running_time (spad);
1368 GST_DEBUG_OBJECT (self, "no active pad while blocking");
1370 GST_INPUT_SELECTOR_UNLOCK (self);
1375 /* stop_time and start_time are running times */
1377 gst_input_selector_switch (GstInputSelector * self, GstPad * pad,
1378 gint64 stop_time, gint64 start_time)
1382 g_return_if_fail (self->blocked == TRUE);
1384 GST_INPUT_SELECTOR_LOCK (self);
1386 gst_input_selector_set_active_pad (self, pad, stop_time, start_time);
1388 self->blocked = FALSE;
1389 GST_INPUT_SELECTOR_BROADCAST (self);
1390 GST_INPUT_SELECTOR_UNLOCK (self);
1393 g_object_notify (G_OBJECT (self), "active-pad");
1397 gst_input_selector_check_eos (GstElement * selector)
1399 GstIterator *it = gst_element_iterate_sink_pads (selector);
1400 GstIteratorResult ires;
1402 gboolean done = FALSE, is_eos = FALSE;
1403 GstSelectorPad *pad;
1406 ires = gst_iterator_next (it, &item);
1408 case GST_ITERATOR_DONE:
1409 GST_INFO_OBJECT (selector, "all sink pads have eos");
1413 case GST_ITERATOR_OK:
1414 pad = GST_SELECTOR_PAD_CAST (item);
1419 case GST_ITERATOR_RESYNC:
1420 gst_iterator_resync (it);
1427 gst_iterator_free (it);