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);
395 /* we are not going to forward the segment, mark the segment as
398 selpad->segment_pending = TRUE;
399 GST_INPUT_SELECTOR_UNLOCK (sel);
405 GstTagList *tags, *oldtags, *newtags;
407 gst_event_parse_tag (event, &tags);
409 GST_OBJECT_LOCK (selpad);
410 oldtags = selpad->tags;
412 newtags = gst_tag_list_merge (oldtags, tags, GST_TAG_MERGE_REPLACE);
413 selpad->tags = newtags;
415 gst_tag_list_free (oldtags);
416 GST_DEBUG_OBJECT (pad, "received tags %" GST_PTR_FORMAT, newtags);
417 GST_OBJECT_UNLOCK (selpad);
422 GST_DEBUG_OBJECT (pad, "received EOS");
423 /* don't forward eos in select_all mode until all sink pads have eos */
424 if (sel->select_all && !gst_input_selector_check_eos (GST_ELEMENT (sel))) {
432 GST_DEBUG_OBJECT (pad, "forwarding event");
433 res = gst_pad_push_event (sel->srcpad, event);
435 gst_event_unref (event);
437 gst_object_unref (sel);
443 gst_selector_pad_getcaps (GstPad * pad)
445 GstInputSelector *sel;
448 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
450 GST_DEBUG_OBJECT (sel, "Getting caps of srcpad peer");
451 caps = gst_pad_peer_get_caps (sel->srcpad);
453 caps = gst_caps_new_any ();
455 gst_object_unref (sel);
461 gst_selector_pad_bufferalloc (GstPad * pad, guint64 offset,
462 guint size, GstCaps * caps, GstBuffer ** buf)
464 GstInputSelector *sel;
465 GstFlowReturn result;
466 GstPad *active_sinkpad;
467 GstPad *prev_active_sinkpad;
468 GstSelectorPad *selpad;
470 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
471 selpad = GST_SELECTOR_PAD_CAST (pad);
473 GST_DEBUG_OBJECT (pad, "received alloc");
475 GST_INPUT_SELECTOR_LOCK (sel);
476 prev_active_sinkpad = sel->active_sinkpad;
477 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
479 if (pad != active_sinkpad)
482 GST_INPUT_SELECTOR_UNLOCK (sel);
484 if (prev_active_sinkpad != active_sinkpad && pad == active_sinkpad)
485 g_object_notify (G_OBJECT (sel), "active-pad");
487 result = gst_pad_alloc_buffer (sel->srcpad, offset, size, caps, buf);
490 gst_object_unref (sel);
497 GST_INPUT_SELECTOR_UNLOCK (sel);
499 /* unselected pad, perform fallback alloc or return unlinked when
501 GST_OBJECT_LOCK (selpad);
502 if (selpad->always_ok) {
503 GST_DEBUG_OBJECT (pad, "Not selected, performing fallback allocation");
505 result = GST_FLOW_OK;
507 GST_DEBUG_OBJECT (pad, "Not selected, return NOT_LINKED");
508 result = GST_FLOW_NOT_LINKED;
510 GST_OBJECT_UNLOCK (selpad);
516 /* must be called with the SELECTOR_LOCK, will block while the pad is blocked
517 * or return TRUE when flushing */
519 gst_input_selector_wait (GstInputSelector * self, GstPad * pad)
521 while (self->blocked && !self->flushing) {
522 /* we can be unlocked here when we are shutting down (flushing) or when we
524 GST_INPUT_SELECTOR_WAIT (self);
526 return self->flushing;
530 gst_selector_pad_chain (GstPad * pad, GstBuffer * buf)
532 GstInputSelector *sel;
534 GstPad *active_sinkpad;
535 GstPad *prev_active_sinkpad;
536 GstSelectorPad *selpad;
537 GstClockTime end_time, duration;
539 GstEvent *close_event = NULL, *start_event = NULL;
541 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
542 selpad = GST_SELECTOR_PAD_CAST (pad);
543 seg = &selpad->segment;
545 GST_INPUT_SELECTOR_LOCK (sel);
546 /* wait or check for flushing */
547 if (gst_input_selector_wait (sel, pad))
550 GST_DEBUG_OBJECT (pad, "getting active pad");
552 prev_active_sinkpad = sel->active_sinkpad;
553 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
555 /* update the segment on the srcpad */
556 end_time = GST_BUFFER_TIMESTAMP (buf);
557 if (GST_CLOCK_TIME_IS_VALID (end_time)) {
558 duration = GST_BUFFER_DURATION (buf);
559 if (GST_CLOCK_TIME_IS_VALID (duration))
560 end_time += duration;
561 GST_DEBUG_OBJECT (pad, "received end time %" GST_TIME_FORMAT,
562 GST_TIME_ARGS (end_time));
564 GST_OBJECT_LOCK (pad);
565 gst_segment_set_last_stop (seg, seg->format, end_time);
566 GST_OBJECT_UNLOCK (pad);
569 /* Ignore buffers from pads except the selected one */
570 if (pad != active_sinkpad)
573 if (G_UNLIKELY (sel->pending_close)) {
574 GstSegment *cseg = &sel->segment;
576 GST_DEBUG_OBJECT (sel,
577 "pushing NEWSEGMENT update %d, rate %lf, applied rate %lf, "
579 "%" G_GINT64_FORMAT " -- %" G_GINT64_FORMAT ", time %"
580 G_GINT64_FORMAT, TRUE, cseg->rate, cseg->applied_rate, cseg->format,
581 cseg->start, cseg->stop, cseg->time);
583 /* create update segment */
584 close_event = gst_event_new_new_segment_full (TRUE, cseg->rate,
585 cseg->applied_rate, cseg->format, cseg->start, cseg->stop, cseg->time);
587 sel->pending_close = FALSE;
589 /* if we have a pending segment, push it out now */
590 if (G_UNLIKELY (selpad->segment_pending)) {
591 GST_DEBUG_OBJECT (pad,
592 "pushing NEWSEGMENT update %d, rate %lf, applied rate %lf, "
594 "%" G_GINT64_FORMAT " -- %" G_GINT64_FORMAT ", time %"
595 G_GINT64_FORMAT, FALSE, seg->rate, seg->applied_rate, seg->format,
596 seg->start, seg->stop, seg->time);
598 start_event = gst_event_new_new_segment_full (FALSE, seg->rate,
599 seg->applied_rate, seg->format, seg->start, seg->stop, seg->time);
601 selpad->segment_pending = FALSE;
603 GST_INPUT_SELECTOR_UNLOCK (sel);
605 if (prev_active_sinkpad != active_sinkpad && pad == active_sinkpad)
606 g_object_notify (G_OBJECT (sel), "active-pad");
609 gst_pad_push_event (sel->srcpad, close_event);
612 gst_pad_push_event (sel->srcpad, start_event);
614 if (selpad->discont) {
615 buf = gst_buffer_make_metadata_writable (buf);
617 GST_DEBUG_OBJECT (pad, "Marking discont buffer %p", buf);
618 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
619 selpad->discont = FALSE;
623 GST_DEBUG_OBJECT (pad, "Forwarding buffer %p from pad %s:%s", buf,
624 GST_DEBUG_PAD_NAME (pad));
626 res = gst_pad_push (sel->srcpad, buf);
629 gst_object_unref (sel);
632 /* dropped buffers */
635 GST_DEBUG_OBJECT (pad, "Pad not active, discard buffer %p", buf);
636 /* when we drop a buffer, we're creating a discont on this pad */
637 selpad->discont = TRUE;
638 GST_INPUT_SELECTOR_UNLOCK (sel);
639 gst_buffer_unref (buf);
641 /* figure out what to return upstream */
642 GST_OBJECT_LOCK (selpad);
643 if (selpad->always_ok)
646 res = GST_FLOW_NOT_LINKED;
647 GST_OBJECT_UNLOCK (selpad);
653 GST_DEBUG_OBJECT (pad, "We are flushing, discard buffer %p", buf);
654 GST_INPUT_SELECTOR_UNLOCK (sel);
655 gst_buffer_unref (buf);
656 res = GST_FLOW_WRONG_STATE;
661 static void gst_input_selector_init (GstInputSelector * sel);
662 static void gst_input_selector_base_init (GstInputSelectorClass * klass);
663 static void gst_input_selector_class_init (GstInputSelectorClass * klass);
665 static void gst_input_selector_dispose (GObject * object);
667 static void gst_input_selector_set_property (GObject * object,
668 guint prop_id, const GValue * value, GParamSpec * pspec);
669 static void gst_input_selector_get_property (GObject * object,
670 guint prop_id, GValue * value, GParamSpec * pspec);
672 static GstPad *gst_input_selector_request_new_pad (GstElement * element,
673 GstPadTemplate * templ, const gchar * unused);
674 static void gst_input_selector_release_pad (GstElement * element, GstPad * pad);
676 static GstStateChangeReturn gst_input_selector_change_state (GstElement *
677 element, GstStateChange transition);
679 static GstCaps *gst_input_selector_getcaps (GstPad * pad);
680 static gboolean gst_input_selector_event (GstPad * pad, GstEvent * event);
681 static gboolean gst_input_selector_query (GstPad * pad, GstQuery * query);
682 static gint64 gst_input_selector_block (GstInputSelector * self);
683 static void gst_input_selector_switch (GstInputSelector * self,
684 GstPad * pad, gint64 stop_time, gint64 start_time);
686 static GstElementClass *parent_class = NULL;
689 gst_input_selector_get_type (void)
691 static GType input_selector_type = 0;
693 if (!input_selector_type) {
694 static const GTypeInfo input_selector_info = {
695 sizeof (GstInputSelectorClass),
696 (GBaseInitFunc) gst_input_selector_base_init,
698 (GClassInitFunc) gst_input_selector_class_init,
701 sizeof (GstInputSelector),
703 (GInstanceInitFunc) gst_input_selector_init,
705 input_selector_type =
706 g_type_register_static (GST_TYPE_ELEMENT,
707 "GstInputSelector", &input_selector_info, 0);
708 GST_DEBUG_CATEGORY_INIT (input_selector_debug,
709 "input-selector", 0, "An input stream selector element");
712 return input_selector_type;
716 gst_input_selector_base_init (GstInputSelectorClass * klass)
718 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
720 gst_element_class_set_details (element_class, &gst_input_selector_details);
721 gst_element_class_add_pad_template (element_class,
722 gst_static_pad_template_get (&gst_input_selector_sink_factory));
723 gst_element_class_add_pad_template (element_class,
724 gst_static_pad_template_get (&gst_input_selector_src_factory));
728 gst_input_selector_class_init (GstInputSelectorClass * klass)
730 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
731 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
733 parent_class = g_type_class_peek_parent (klass);
735 gobject_class->dispose = gst_input_selector_dispose;
737 gobject_class->set_property =
738 GST_DEBUG_FUNCPTR (gst_input_selector_set_property);
739 gobject_class->get_property =
740 GST_DEBUG_FUNCPTR (gst_input_selector_get_property);
742 g_object_class_install_property (gobject_class, PROP_N_PADS,
743 g_param_spec_uint ("n-pads", "Number of Pads",
744 "The number of sink pads", 0, G_MAXUINT, 0, G_PARAM_READABLE));
746 g_object_class_install_property (gobject_class, PROP_ACTIVE_PAD,
747 g_param_spec_object ("active-pad", "Active pad",
748 "The currently active sink pad", GST_TYPE_PAD, G_PARAM_READWRITE));
750 g_object_class_install_property (gobject_class, PROP_SELECT_ALL,
751 g_param_spec_boolean ("select-all", "Select all mode",
752 "Forwards data from all input pads", FALSE, G_PARAM_READWRITE));
755 * GstInputSelector::block:
756 * @inputselector: the #GstInputSelector
758 * Block all sink pads in preparation for a switch. Returns the stop time of
759 * the current switch segment, as a running time, or 0 if there is no current
760 * active pad or the current active pad never received data.
762 gst_input_selector_signals[SIGNAL_BLOCK] =
763 g_signal_new ("block", G_TYPE_FROM_CLASS (klass),
764 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
765 G_STRUCT_OFFSET (GstInputSelectorClass, block), NULL, NULL,
766 gst_selector_marshal_INT64__VOID, G_TYPE_INT64, 0);
768 * GstInputSelector::switch:
769 * @inputselector: the #GstInputSelector
770 * @pad: the pad to switch to
771 * @stop_time: running time at which to close the previous segment, or -1
772 * to use the running time of the previously active sink pad
773 * @start_time: running time at which to start the new segment, or -1 to
774 * use the running time of the newly active sink pad
776 * Switch to a new feed. The segment opened by the previously active pad, if
777 * any, will be closed, and a new segment opened before data flows again.
779 * This signal must be emitted when the element has been blocked via the <link
780 * linkend="GstInputSelector-block">block</link> signal.
782 * If you have a stream with only one switch element, such as an audio-only
783 * stream, a stream switch should be performed by first emitting the block
784 * signal, and then emitting the switch signal with -1 for the stop and start
787 * The intention of the @stop_time and @start_time arguments is to allow
788 * multiple switch elements to switch and maintain stream synchronization.
789 * When switching a stream with multiple feeds, you will need as many switch
790 * elements as you have feeds. For example, a feed with audio and video will
791 * have one switch element between the audio feeds and one for video.
793 * A switch over multiple switch elements should be performed as follows:
794 * First, emit the <link linkend="GstInputSelector-block">block</link>
795 * signal, collecting the returned values. The maximum running time returned
796 * by block should then be used as the time at which to close the previous
799 * Then, query the running times of the new audio and video pads that you will
800 * switch to. Naturally, these pads are on separate switch elements. Take the
801 * minimum running time for those streams and use it for the time at which to
802 * open the new segment.
804 * If @pad is the same as the current active pad, the element will cancel any
805 * previous block without adjusting segments.
808 * the signal changed from accepting the pad name to the pad object.
813 gst_input_selector_signals[SIGNAL_SWITCH] =
814 g_signal_new ("switch", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
815 G_STRUCT_OFFSET (GstInputSelectorClass, switch_),
816 NULL, NULL, gst_selector_marshal_VOID__OBJECT_INT64_INT64,
817 G_TYPE_NONE, 3, GST_TYPE_PAD, G_TYPE_INT64, G_TYPE_INT64);
819 gstelement_class->request_new_pad = gst_input_selector_request_new_pad;
820 gstelement_class->release_pad = gst_input_selector_release_pad;
821 gstelement_class->change_state = gst_input_selector_change_state;
823 klass->block = GST_DEBUG_FUNCPTR (gst_input_selector_block);
824 /* note the underscore because switch is a keyword otherwise */
825 klass->switch_ = GST_DEBUG_FUNCPTR (gst_input_selector_switch);
829 gst_input_selector_init (GstInputSelector * sel)
831 sel->srcpad = gst_pad_new ("src", GST_PAD_SRC);
832 gst_pad_set_internal_link_function (sel->srcpad,
833 GST_DEBUG_FUNCPTR (gst_selector_pad_get_linked_pads));
834 gst_pad_set_getcaps_function (sel->srcpad,
835 GST_DEBUG_FUNCPTR (gst_input_selector_getcaps));
836 gst_pad_set_query_function (sel->srcpad,
837 GST_DEBUG_FUNCPTR (gst_input_selector_query));
838 gst_pad_set_event_function (sel->srcpad,
839 GST_DEBUG_FUNCPTR (gst_input_selector_event));
840 gst_element_add_pad (GST_ELEMENT (sel), sel->srcpad);
841 /* sinkpad management */
842 sel->active_sinkpad = NULL;
844 gst_segment_init (&sel->segment, GST_FORMAT_UNDEFINED);
846 sel->lock = g_mutex_new ();
847 sel->cond = g_cond_new ();
848 sel->blocked = FALSE;
850 sel->select_all = FALSE;
854 gst_input_selector_dispose (GObject * object)
856 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
858 if (sel->active_sinkpad) {
859 gst_object_unref (sel->active_sinkpad);
860 sel->active_sinkpad = NULL;
863 g_mutex_free (sel->lock);
867 g_cond_free (sel->cond);
871 G_OBJECT_CLASS (parent_class)->dispose (object);
874 /* Solve the following equation for B.timestamp, and set that as the segment
876 * B.running_time = (B.timestamp - NS.start) / NS.abs_rate + NS.accum
879 gst_segment_get_timestamp (GstSegment * segment, gint64 running_time)
881 return (running_time - segment->accum) * segment->abs_rate + segment->start;
885 gst_segment_set_stop (GstSegment * segment, gint64 running_time)
887 segment->stop = gst_segment_get_timestamp (segment, running_time);
888 segment->last_stop = -1;
892 gst_segment_set_start (GstSegment * segment, gint64 running_time)
894 gint64 new_start, duration;
896 new_start = gst_segment_get_timestamp (segment, running_time);
898 /* this is the duration we skipped */
899 duration = new_start - segment->start;
900 /* add the duration to the accumulated segment time */
901 segment->accum += duration;
902 /* move position in the segment */
903 segment->time += duration;
904 segment->start += duration;
907 /* this function must be called with the SELECTOR_LOCK. It returns TRUE when the
908 * active pad changed. */
910 gst_input_selector_set_active_pad (GstInputSelector * self,
911 GstPad * pad, gint64 stop_time, gint64 start_time)
913 GstSelectorPad *old, *new;
914 GstPad **active_pad_p;
916 if (pad == self->active_sinkpad)
919 old = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
920 new = GST_SELECTOR_PAD_CAST (pad);
922 GST_DEBUG_OBJECT (self, "setting active pad to %s:%s",
923 GST_DEBUG_PAD_NAME (new));
925 if (stop_time == -1 && old) {
926 /* no stop time given, get the latest running_time on the active pad to
927 * close and open the new segment */
928 stop_time = start_time = gst_selector_pad_get_running_time (old);
929 GST_DEBUG_OBJECT (self, "using start/stop of %" G_GINT64_FORMAT,
933 if (old && old->active && !self->pending_close && stop_time >= 0) {
934 /* schedule a last_stop update if one isn't already scheduled, and a
935 segment has been pushed before. */
936 memcpy (&self->segment, &old->segment, sizeof (self->segment));
938 GST_DEBUG_OBJECT (self, "setting stop_time to %" G_GINT64_FORMAT,
940 gst_segment_set_stop (&self->segment, stop_time);
941 self->pending_close = TRUE;
944 if (new && new->active && start_time >= 0) {
945 GST_DEBUG_OBJECT (self, "setting start_time to %" G_GINT64_FORMAT,
947 /* schedule a new segment push */
948 gst_segment_set_start (&new->segment, start_time);
949 new->segment_pending = TRUE;
952 active_pad_p = &self->active_sinkpad;
953 gst_object_replace ((GstObject **) active_pad_p, GST_OBJECT_CAST (pad));
954 GST_DEBUG_OBJECT (self, "New active pad is %" GST_PTR_FORMAT,
955 self->active_sinkpad);
961 gst_input_selector_set_property (GObject * object, guint prop_id,
962 const GValue * value, GParamSpec * pspec)
964 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
967 case PROP_ACTIVE_PAD:
971 pad = g_value_get_object (value);
973 GST_INPUT_SELECTOR_LOCK (sel);
974 gst_input_selector_set_active_pad (sel, pad,
975 GST_CLOCK_TIME_NONE, GST_CLOCK_TIME_NONE);
976 GST_INPUT_SELECTOR_UNLOCK (sel);
979 case PROP_SELECT_ALL:
980 GST_INPUT_SELECTOR_LOCK (object);
981 sel->select_all = g_value_get_boolean (value);
982 GST_INPUT_SELECTOR_UNLOCK (object);
985 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
991 gst_input_selector_get_property (GObject * object, guint prop_id,
992 GValue * value, GParamSpec * pspec)
994 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
998 GST_INPUT_SELECTOR_LOCK (object);
999 g_value_set_uint (value, sel->n_pads);
1000 GST_INPUT_SELECTOR_UNLOCK (object);
1002 case PROP_ACTIVE_PAD:
1003 GST_INPUT_SELECTOR_LOCK (object);
1004 g_value_set_object (value, sel->active_sinkpad);
1005 GST_INPUT_SELECTOR_UNLOCK (object);
1007 case PROP_SELECT_ALL:
1008 GST_INPUT_SELECTOR_LOCK (object);
1009 g_value_set_boolean (value, sel->select_all);
1010 GST_INPUT_SELECTOR_UNLOCK (object);
1013 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1019 gst_input_selector_get_linked_pad (GstPad * pad, gboolean strict)
1021 GstInputSelector *sel;
1022 GstPad *otherpad = NULL;
1024 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
1026 GST_INPUT_SELECTOR_LOCK (sel);
1027 if (pad == sel->srcpad)
1028 otherpad = sel->active_sinkpad;
1029 else if (pad == sel->active_sinkpad || !strict)
1030 otherpad = sel->srcpad;
1032 gst_object_ref (otherpad);
1033 GST_INPUT_SELECTOR_UNLOCK (sel);
1035 gst_object_unref (sel);
1041 gst_input_selector_event (GstPad * pad, GstEvent * event)
1043 gboolean res = FALSE;
1046 otherpad = gst_input_selector_get_linked_pad (pad, TRUE);
1049 res = gst_pad_push_event (otherpad, event);
1051 gst_object_unref (otherpad);
1053 gst_event_unref (event);
1057 /* query on the srcpad. We override this function because by default it will
1058 * only forward the query to one random sinkpad */
1060 gst_input_selector_query (GstPad * pad, GstQuery * query)
1062 gboolean res = TRUE;
1063 GstInputSelector *sel;
1066 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
1068 otherpad = gst_input_selector_get_linked_pad (pad, TRUE);
1070 switch (GST_QUERY_TYPE (query)) {
1071 case GST_QUERY_LATENCY:
1074 GstClockTime resmin, resmax;
1081 /* assume FALSE, we become TRUE if one query succeeds */
1084 /* perform the query on all sinkpads and combine the results. We take the
1085 * max of min and the min of max for the result latency. */
1086 GST_INPUT_SELECTOR_LOCK (sel);
1087 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk;
1088 walk = g_list_next (walk)) {
1089 GstPad *sinkpad = GST_PAD_CAST (walk->data);
1091 if (gst_pad_peer_query (sinkpad, query)) {
1092 GstClockTime min, max;
1095 /* one query succeeded, we succeed too */
1098 gst_query_parse_latency (query, &live, &min, &max);
1100 GST_DEBUG_OBJECT (sinkpad,
1101 "peer latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
1102 ", live %d", GST_TIME_ARGS (min), GST_TIME_ARGS (max), live);
1109 else if (max < resmax)
1111 if (reslive == FALSE)
1116 GST_INPUT_SELECTOR_UNLOCK (sel);
1118 gst_query_set_latency (query, reslive, resmin, resmax);
1120 GST_DEBUG_OBJECT (sel,
1121 "total latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
1122 ", live %d", GST_TIME_ARGS (resmin), GST_TIME_ARGS (resmax),
1130 res = gst_pad_peer_query (otherpad, query);
1134 gst_object_unref (otherpad);
1135 gst_object_unref (sel);
1141 gst_input_selector_getcaps (GstPad * pad)
1147 parent = gst_object_get_parent (GST_OBJECT (pad));
1149 otherpad = gst_input_selector_get_linked_pad (pad, FALSE);
1152 if (GST_INPUT_SELECTOR (parent)->select_all) {
1153 GST_DEBUG_OBJECT (parent,
1154 "Pad %s:%s not linked, returning merge of caps",
1155 GST_DEBUG_PAD_NAME (pad));
1156 caps = gst_pad_proxy_getcaps (pad);
1158 GST_DEBUG_OBJECT (parent,
1159 "Pad %s:%s not linked, returning ANY", GST_DEBUG_PAD_NAME (pad));
1160 caps = gst_caps_new_any ();
1163 GST_DEBUG_OBJECT (parent,
1164 "Pad %s:%s is linked (to %s:%s), returning peer caps",
1165 GST_DEBUG_PAD_NAME (pad), GST_DEBUG_PAD_NAME (otherpad));
1166 /* if the peer has caps, use those. If the pad is not linked, this function
1167 * returns NULL and we return ANY */
1168 if (!(caps = gst_pad_peer_get_caps (otherpad)))
1169 caps = gst_caps_new_any ();
1170 gst_object_unref (otherpad);
1173 gst_object_unref (parent);
1177 /* check if the pad is the active sinkpad */
1179 gst_input_selector_is_active_sinkpad (GstInputSelector * sel, GstPad * pad)
1181 GstSelectorPad *selpad;
1184 selpad = GST_SELECTOR_PAD_CAST (pad);
1186 GST_INPUT_SELECTOR_LOCK (sel);
1187 res = (pad == sel->active_sinkpad);
1188 GST_INPUT_SELECTOR_UNLOCK (sel);
1193 /* Get or create the active sinkpad, must be called with SELECTOR_LOCK */
1195 gst_input_selector_activate_sinkpad (GstInputSelector * sel, GstPad * pad)
1197 GstPad *active_sinkpad;
1198 GstSelectorPad *selpad;
1200 selpad = GST_SELECTOR_PAD_CAST (pad);
1202 selpad->active = TRUE;
1203 active_sinkpad = sel->active_sinkpad;
1204 if (active_sinkpad == NULL || sel->select_all) {
1205 /* first pad we get activity on becomes the activated pad by default, if we
1206 * select all, we also remember the last used pad. */
1207 if (sel->active_sinkpad)
1208 gst_object_unref (sel->active_sinkpad);
1209 active_sinkpad = sel->active_sinkpad = gst_object_ref (pad);
1210 GST_DEBUG_OBJECT (sel, "Activating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1213 return active_sinkpad;
1217 gst_input_selector_request_new_pad (GstElement * element,
1218 GstPadTemplate * templ, const gchar * unused)
1220 GstInputSelector *sel;
1222 GstPad *sinkpad = NULL;
1224 g_return_val_if_fail (templ->direction == GST_PAD_SINK, NULL);
1226 sel = GST_INPUT_SELECTOR (element);
1228 GST_INPUT_SELECTOR_LOCK (sel);
1230 GST_LOG_OBJECT (sel, "Creating new pad %d", sel->padcount);
1231 name = g_strdup_printf ("sink%d", sel->padcount++);
1232 sinkpad = g_object_new (GST_TYPE_SELECTOR_PAD,
1233 "name", name, "direction", templ->direction, "template", templ, NULL);
1238 gst_pad_set_event_function (sinkpad,
1239 GST_DEBUG_FUNCPTR (gst_selector_pad_event));
1240 gst_pad_set_getcaps_function (sinkpad,
1241 GST_DEBUG_FUNCPTR (gst_selector_pad_getcaps));
1242 gst_pad_set_chain_function (sinkpad,
1243 GST_DEBUG_FUNCPTR (gst_selector_pad_chain));
1244 gst_pad_set_internal_link_function (sinkpad,
1245 GST_DEBUG_FUNCPTR (gst_selector_pad_get_linked_pads));
1246 gst_pad_set_bufferalloc_function (sinkpad,
1247 GST_DEBUG_FUNCPTR (gst_selector_pad_bufferalloc));
1249 gst_pad_set_active (sinkpad, TRUE);
1250 gst_element_add_pad (GST_ELEMENT (sel), sinkpad);
1251 GST_INPUT_SELECTOR_UNLOCK (sel);
1257 gst_input_selector_release_pad (GstElement * element, GstPad * pad)
1259 GstInputSelector *sel;
1261 sel = GST_INPUT_SELECTOR (element);
1262 GST_LOG_OBJECT (sel, "Releasing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1264 GST_INPUT_SELECTOR_LOCK (sel);
1265 /* if the pad was the active pad, makes us select a new one */
1266 if (sel->active_sinkpad == pad) {
1267 GST_DEBUG_OBJECT (sel, "Deactivating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1268 gst_object_unref (sel->active_sinkpad);
1269 sel->active_sinkpad = NULL;
1273 gst_pad_set_active (pad, FALSE);
1274 gst_element_remove_pad (GST_ELEMENT (sel), pad);
1275 GST_INPUT_SELECTOR_UNLOCK (sel);
1279 gst_input_selector_reset (GstInputSelector * sel)
1283 GST_INPUT_SELECTOR_LOCK (sel);
1284 /* clear active pad */
1285 if (sel->active_sinkpad) {
1286 gst_object_unref (sel->active_sinkpad);
1287 sel->active_sinkpad = NULL;
1290 gst_segment_init (&sel->segment, GST_FORMAT_UNDEFINED);
1291 sel->pending_close = FALSE;
1292 /* reset each of our sinkpads state */
1293 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
1294 GstSelectorPad *selpad = GST_SELECTOR_PAD_CAST (walk->data);
1296 gst_selector_pad_reset (selpad);
1299 gst_tag_list_free (selpad->tags);
1300 selpad->tags = NULL;
1303 GST_INPUT_SELECTOR_UNLOCK (sel);
1306 static GstStateChangeReturn
1307 gst_input_selector_change_state (GstElement * element,
1308 GstStateChange transition)
1310 GstInputSelector *self = GST_INPUT_SELECTOR (element);
1311 GstStateChangeReturn result;
1313 switch (transition) {
1314 case GST_STATE_CHANGE_READY_TO_PAUSED:
1315 GST_INPUT_SELECTOR_LOCK (self);
1316 self->blocked = FALSE;
1317 self->flushing = FALSE;
1318 GST_INPUT_SELECTOR_UNLOCK (self);
1320 case GST_STATE_CHANGE_PAUSED_TO_READY:
1321 /* first unlock before we call the parent state change function, which
1322 * tries to acquire the stream lock when going to ready. */
1323 GST_INPUT_SELECTOR_LOCK (self);
1324 self->blocked = FALSE;
1325 self->flushing = TRUE;
1326 GST_INPUT_SELECTOR_BROADCAST (self);
1327 GST_INPUT_SELECTOR_UNLOCK (self);
1333 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1335 switch (transition) {
1336 case GST_STATE_CHANGE_PAUSED_TO_READY:
1337 gst_input_selector_reset (self);
1347 gst_input_selector_block (GstInputSelector * self)
1350 GstSelectorPad *spad;
1352 GST_INPUT_SELECTOR_LOCK (self);
1355 GST_WARNING_OBJECT (self, "switch already blocked");
1357 self->blocked = TRUE;
1358 spad = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
1361 ret = gst_selector_pad_get_running_time (spad);
1363 GST_DEBUG_OBJECT (self, "no active pad while blocking");
1365 GST_INPUT_SELECTOR_UNLOCK (self);
1370 /* stop_time and start_time are running times */
1372 gst_input_selector_switch (GstInputSelector * self, GstPad * pad,
1373 gint64 stop_time, gint64 start_time)
1377 g_return_if_fail (self->blocked == TRUE);
1379 GST_INPUT_SELECTOR_LOCK (self);
1381 gst_input_selector_set_active_pad (self, pad, stop_time, start_time);
1383 self->blocked = FALSE;
1384 GST_INPUT_SELECTOR_BROADCAST (self);
1385 GST_INPUT_SELECTOR_UNLOCK (self);
1388 g_object_notify (G_OBJECT (self), "active-pad");
1392 gst_input_selector_check_eos (GstElement * selector)
1394 GstIterator *it = gst_element_iterate_sink_pads (selector);
1395 GstIteratorResult ires;
1397 gboolean done = FALSE, is_eos = FALSE;
1398 GstSelectorPad *pad;
1401 ires = gst_iterator_next (it, &item);
1403 case GST_ITERATOR_DONE:
1404 GST_INFO_OBJECT (selector, "all sink pads have eos");
1408 case GST_ITERATOR_OK:
1409 pad = GST_SELECTOR_PAD_CAST (item);
1414 case GST_ITERATOR_RESYNC:
1415 gst_iterator_resync (it);
1422 gst_iterator_free (it);