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;
346 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
347 selpad = GST_SELECTOR_PAD_CAST (pad);
349 /* only forward if we are dealing with the active sinkpad */
350 forward = gst_input_selector_is_active_sinkpad (sel, pad);
352 /* forward all events in select_all mode by default */
353 if (sel->select_all) {
357 switch (GST_EVENT_TYPE (event)) {
358 case GST_EVENT_FLUSH_START:
359 /* FIXME, flush out the waiter */
361 case GST_EVENT_FLUSH_STOP:
362 GST_INPUT_SELECTOR_LOCK (sel);
363 gst_selector_pad_reset (selpad);
364 sel->pending_close = FALSE;
365 GST_INPUT_SELECTOR_UNLOCK (sel);
367 case GST_EVENT_NEWSEGMENT:
372 gint64 start, stop, time;
374 gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format,
375 &start, &stop, &time);
377 GST_DEBUG_OBJECT (pad,
378 "configured NEWSEGMENT update %d, rate %lf, applied rate %lf, "
380 "%" G_GINT64_FORMAT " -- %" G_GINT64_FORMAT ", time %"
381 G_GINT64_FORMAT, update, rate, arate, format, start, stop, time);
383 GST_INPUT_SELECTOR_LOCK (sel);
384 GST_OBJECT_LOCK (selpad);
385 gst_segment_set_newsegment_full (&selpad->segment, update,
386 rate, arate, format, start, stop, time);
387 GST_OBJECT_UNLOCK (selpad);
388 /* we are not going to forward the segment, mark the segment as
391 selpad->segment_pending = TRUE;
392 GST_INPUT_SELECTOR_UNLOCK (sel);
400 GST_OBJECT_LOCK (selpad);
402 gst_tag_list_free (selpad->tags);
403 gst_event_parse_tag (event, &tags);
405 tags = gst_tag_list_copy (tags);
407 GST_DEBUG_OBJECT (pad, "received tags %" GST_PTR_FORMAT, selpad->tags);
408 GST_OBJECT_UNLOCK (selpad);
413 GST_DEBUG_OBJECT (pad, "received EOS");
414 /* don't forward eos in select_all mode until all sink pads have eos */
415 if (sel->select_all && !gst_input_selector_check_eos (GST_ELEMENT (sel))) {
423 GST_DEBUG_OBJECT (pad, "forwarding event");
424 res = gst_pad_push_event (sel->srcpad, event);
426 gst_event_unref (event);
428 gst_object_unref (sel);
434 gst_selector_pad_getcaps (GstPad * pad)
436 GstInputSelector *sel;
439 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
441 GST_DEBUG_OBJECT (sel, "Getting caps of srcpad peer");
442 caps = gst_pad_peer_get_caps (sel->srcpad);
444 caps = gst_caps_new_any ();
446 gst_object_unref (sel);
452 gst_selector_pad_bufferalloc (GstPad * pad, guint64 offset,
453 guint size, GstCaps * caps, GstBuffer ** buf)
455 GstInputSelector *sel;
456 GstFlowReturn result;
457 GstPad *active_sinkpad;
458 GstPad *prev_active_sinkpad;
459 GstSelectorPad *selpad;
461 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
462 selpad = GST_SELECTOR_PAD_CAST (pad);
464 GST_DEBUG_OBJECT (pad, "received alloc");
466 GST_INPUT_SELECTOR_LOCK (sel);
467 prev_active_sinkpad = sel->active_sinkpad;
468 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
470 if (pad != active_sinkpad)
473 GST_INPUT_SELECTOR_UNLOCK (sel);
475 if (prev_active_sinkpad != active_sinkpad && pad == active_sinkpad)
476 g_object_notify (G_OBJECT (sel), "active-pad");
478 result = gst_pad_alloc_buffer (sel->srcpad, offset, size, caps, buf);
481 gst_object_unref (sel);
488 GST_INPUT_SELECTOR_UNLOCK (sel);
490 /* unselected pad, perform fallback alloc or return unlinked when
492 GST_OBJECT_LOCK (selpad);
493 if (selpad->always_ok) {
494 GST_DEBUG_OBJECT (pad, "Not selected, performing fallback allocation");
496 result = GST_FLOW_OK;
498 GST_DEBUG_OBJECT (pad, "Not selected, return NOT_LINKED");
499 result = GST_FLOW_NOT_LINKED;
501 GST_OBJECT_UNLOCK (selpad);
507 /* must be called with the SELECTOR_LOCK, will block while the pad is blocked
508 * or return TRUE when flushing */
510 gst_input_selector_wait (GstInputSelector * self, GstPad * pad)
512 while (self->blocked && !self->flushing) {
513 /* we can be unlocked here when we are shutting down (flushing) or when we
515 GST_INPUT_SELECTOR_WAIT (self);
517 return self->flushing;
521 gst_selector_pad_chain (GstPad * pad, GstBuffer * buf)
523 GstInputSelector *sel;
525 GstPad *active_sinkpad;
526 GstPad *prev_active_sinkpad;
527 GstSelectorPad *selpad;
528 GstClockTime end_time, duration;
530 GstEvent *close_event = NULL, *start_event = NULL;
532 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
533 selpad = GST_SELECTOR_PAD_CAST (pad);
534 seg = &selpad->segment;
536 GST_INPUT_SELECTOR_LOCK (sel);
537 /* wait or check for flushing */
538 if (gst_input_selector_wait (sel, pad))
541 GST_DEBUG_OBJECT (pad, "getting active pad");
543 prev_active_sinkpad = sel->active_sinkpad;
544 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
546 /* update the segment on the srcpad */
547 end_time = GST_BUFFER_TIMESTAMP (buf);
548 if (GST_CLOCK_TIME_IS_VALID (end_time)) {
549 duration = GST_BUFFER_DURATION (buf);
550 if (GST_CLOCK_TIME_IS_VALID (duration))
551 end_time += duration;
552 GST_DEBUG_OBJECT (pad, "received end time %" GST_TIME_FORMAT,
553 GST_TIME_ARGS (end_time));
555 GST_OBJECT_LOCK (pad);
556 gst_segment_set_last_stop (seg, seg->format, end_time);
557 GST_OBJECT_UNLOCK (pad);
560 /* Ignore buffers from pads except the selected one */
561 if (pad != active_sinkpad)
564 if (G_UNLIKELY (sel->pending_close)) {
565 GstSegment *cseg = &sel->segment;
567 GST_DEBUG_OBJECT (sel,
568 "pushing NEWSEGMENT update %d, rate %lf, applied rate %lf, "
570 "%" G_GINT64_FORMAT " -- %" G_GINT64_FORMAT ", time %"
571 G_GINT64_FORMAT, TRUE, cseg->rate, cseg->applied_rate, cseg->format,
572 cseg->start, cseg->stop, cseg->time);
574 /* create update segment */
575 close_event = gst_event_new_new_segment_full (TRUE, cseg->rate,
576 cseg->applied_rate, cseg->format, cseg->start, cseg->stop, cseg->time);
578 sel->pending_close = FALSE;
580 /* if we have a pending segment, push it out now */
581 if (G_UNLIKELY (selpad->segment_pending)) {
582 GST_DEBUG_OBJECT (pad,
583 "pushing NEWSEGMENT update %d, rate %lf, applied rate %lf, "
585 "%" G_GINT64_FORMAT " -- %" G_GINT64_FORMAT ", time %"
586 G_GINT64_FORMAT, FALSE, seg->rate, seg->applied_rate, seg->format,
587 seg->start, seg->stop, seg->time);
589 start_event = gst_event_new_new_segment_full (FALSE, seg->rate,
590 seg->applied_rate, seg->format, seg->start, seg->stop, seg->time);
592 selpad->segment_pending = FALSE;
594 GST_INPUT_SELECTOR_UNLOCK (sel);
596 if (prev_active_sinkpad != active_sinkpad && pad == active_sinkpad)
597 g_object_notify (G_OBJECT (sel), "active-pad");
600 gst_pad_push_event (sel->srcpad, close_event);
603 gst_pad_push_event (sel->srcpad, start_event);
605 if (selpad->discont) {
606 buf = gst_buffer_make_metadata_writable (buf);
608 GST_DEBUG_OBJECT (pad, "Marking discont buffer %p", buf);
609 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
610 selpad->discont = FALSE;
614 GST_DEBUG_OBJECT (pad, "Forwarding buffer %p from pad %s:%s", buf,
615 GST_DEBUG_PAD_NAME (pad));
617 res = gst_pad_push (sel->srcpad, buf);
620 gst_object_unref (sel);
623 /* dropped buffers */
626 GST_DEBUG_OBJECT (pad, "Pad not active, discard buffer %p", buf);
627 /* when we drop a buffer, we're creating a discont on this pad */
628 selpad->discont = TRUE;
629 GST_INPUT_SELECTOR_UNLOCK (sel);
630 gst_buffer_unref (buf);
632 /* figure out what to return upstream */
633 GST_OBJECT_LOCK (selpad);
634 if (selpad->always_ok)
637 res = GST_FLOW_NOT_LINKED;
638 GST_OBJECT_UNLOCK (selpad);
644 GST_DEBUG_OBJECT (pad, "We are flushing, discard buffer %p", buf);
645 GST_INPUT_SELECTOR_UNLOCK (sel);
646 gst_buffer_unref (buf);
647 res = GST_FLOW_WRONG_STATE;
652 static void gst_input_selector_init (GstInputSelector * sel);
653 static void gst_input_selector_base_init (GstInputSelectorClass * klass);
654 static void gst_input_selector_class_init (GstInputSelectorClass * klass);
656 static void gst_input_selector_dispose (GObject * object);
658 static void gst_input_selector_set_property (GObject * object,
659 guint prop_id, const GValue * value, GParamSpec * pspec);
660 static void gst_input_selector_get_property (GObject * object,
661 guint prop_id, GValue * value, GParamSpec * pspec);
663 static GstPad *gst_input_selector_request_new_pad (GstElement * element,
664 GstPadTemplate * templ, const gchar * unused);
665 static void gst_input_selector_release_pad (GstElement * element, GstPad * pad);
667 static GstStateChangeReturn gst_input_selector_change_state (GstElement *
668 element, GstStateChange transition);
670 static GstCaps *gst_input_selector_getcaps (GstPad * pad);
671 static gboolean gst_input_selector_event (GstPad * pad, GstEvent * event);
672 static gboolean gst_input_selector_query (GstPad * pad, GstQuery * query);
673 static gint64 gst_input_selector_block (GstInputSelector * self);
674 static void gst_input_selector_switch (GstInputSelector * self,
675 GstPad * pad, gint64 stop_time, gint64 start_time);
677 static GstElementClass *parent_class = NULL;
680 gst_input_selector_get_type (void)
682 static GType input_selector_type = 0;
684 if (!input_selector_type) {
685 static const GTypeInfo input_selector_info = {
686 sizeof (GstInputSelectorClass),
687 (GBaseInitFunc) gst_input_selector_base_init,
689 (GClassInitFunc) gst_input_selector_class_init,
692 sizeof (GstInputSelector),
694 (GInstanceInitFunc) gst_input_selector_init,
696 input_selector_type =
697 g_type_register_static (GST_TYPE_ELEMENT,
698 "GstInputSelector", &input_selector_info, 0);
699 GST_DEBUG_CATEGORY_INIT (input_selector_debug,
700 "input-selector", 0, "An input stream selector element");
703 return input_selector_type;
707 gst_input_selector_base_init (GstInputSelectorClass * klass)
709 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
711 gst_element_class_set_details (element_class, &gst_input_selector_details);
712 gst_element_class_add_pad_template (element_class,
713 gst_static_pad_template_get (&gst_input_selector_sink_factory));
714 gst_element_class_add_pad_template (element_class,
715 gst_static_pad_template_get (&gst_input_selector_src_factory));
719 gst_input_selector_class_init (GstInputSelectorClass * klass)
721 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
722 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
724 parent_class = g_type_class_peek_parent (klass);
726 gobject_class->dispose = gst_input_selector_dispose;
728 gobject_class->set_property =
729 GST_DEBUG_FUNCPTR (gst_input_selector_set_property);
730 gobject_class->get_property =
731 GST_DEBUG_FUNCPTR (gst_input_selector_get_property);
733 g_object_class_install_property (gobject_class, PROP_N_PADS,
734 g_param_spec_uint ("n-pads", "Number of Pads",
735 "The number of sink pads", 0, G_MAXUINT, 0, G_PARAM_READABLE));
737 g_object_class_install_property (gobject_class, PROP_ACTIVE_PAD,
738 g_param_spec_object ("active-pad", "Active pad",
739 "The currently active sink pad", GST_TYPE_PAD, G_PARAM_READWRITE));
741 g_object_class_install_property (gobject_class, PROP_SELECT_ALL,
742 g_param_spec_boolean ("select-all", "Select all mode",
743 "Forwards data from all input pads", FALSE, G_PARAM_READWRITE));
746 * GstInputSelector::block:
747 * @inputselector: the #GstInputSelector
749 * Block all sink pads in preparation for a switch. Returns the stop time of
750 * the current switch segment, as a running time, or 0 if there is no current
751 * active pad or the current active pad never received data.
753 gst_input_selector_signals[SIGNAL_BLOCK] =
754 g_signal_new ("block", G_TYPE_FROM_CLASS (klass),
755 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
756 G_STRUCT_OFFSET (GstInputSelectorClass, block), NULL, NULL,
757 gst_selector_marshal_INT64__VOID, G_TYPE_INT64, 0);
759 * GstInputSelector::switch:
760 * @inputselector: the #GstInputSelector
761 * @pad: the pad to switch to
762 * @stop_time: running time at which to close the previous segment, or -1
763 * to use the running time of the previously active sink pad
764 * @start_time: running time at which to start the new segment, or -1 to
765 * use the running time of the newly active sink pad
767 * Switch to a new feed. The segment opened by the previously active pad, if
768 * any, will be closed, and a new segment opened before data flows again.
770 * This signal must be emitted when the element has been blocked via the <link
771 * linkend="GstInputSelector-block">block</link> signal.
773 * If you have a stream with only one switch element, such as an audio-only
774 * stream, a stream switch should be performed by first emitting the block
775 * signal, and then emitting the switch signal with -1 for the stop and start
778 * The intention of the @stop_time and @start_time arguments is to allow
779 * multiple switch elements to switch and maintain stream synchronization.
780 * When switching a stream with multiple feeds, you will need as many switch
781 * elements as you have feeds. For example, a feed with audio and video will
782 * have one switch element between the audio feeds and one for video.
784 * A switch over multiple switch elements should be performed as follows:
785 * First, emit the <link linkend="GstInputSelector-block">block</link>
786 * signal, collecting the returned values. The maximum running time returned
787 * by block should then be used as the time at which to close the previous
790 * Then, query the running times of the new audio and video pads that you will
791 * switch to. Naturally, these pads are on separate switch elements. Take the
792 * minimum running time for those streams and use it for the time at which to
793 * open the new segment.
795 * If @pad is the same as the current active pad, the element will cancel any
796 * previous block without adjusting segments.
798 * Since: 0.10.7 the signal changed from accepting the pad name to the pad
801 gst_input_selector_signals[SIGNAL_SWITCH] =
802 g_signal_new ("switch", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
803 G_STRUCT_OFFSET (GstInputSelectorClass, switch_),
804 NULL, NULL, gst_selector_marshal_VOID__OBJECT_INT64_INT64,
805 G_TYPE_NONE, 3, GST_TYPE_PAD, G_TYPE_INT64, G_TYPE_INT64);
807 gstelement_class->request_new_pad = gst_input_selector_request_new_pad;
808 gstelement_class->release_pad = gst_input_selector_release_pad;
809 gstelement_class->change_state = gst_input_selector_change_state;
811 klass->block = GST_DEBUG_FUNCPTR (gst_input_selector_block);
812 /* note the underscore because switch is a keyword otherwise */
813 klass->switch_ = GST_DEBUG_FUNCPTR (gst_input_selector_switch);
817 gst_input_selector_init (GstInputSelector * sel)
819 sel->srcpad = gst_pad_new ("src", GST_PAD_SRC);
820 gst_pad_set_internal_link_function (sel->srcpad,
821 GST_DEBUG_FUNCPTR (gst_selector_pad_get_linked_pads));
822 gst_pad_set_getcaps_function (sel->srcpad,
823 GST_DEBUG_FUNCPTR (gst_input_selector_getcaps));
824 gst_pad_set_query_function (sel->srcpad,
825 GST_DEBUG_FUNCPTR (gst_input_selector_query));
826 gst_pad_set_event_function (sel->srcpad,
827 GST_DEBUG_FUNCPTR (gst_input_selector_event));
828 gst_element_add_pad (GST_ELEMENT (sel), sel->srcpad);
829 /* sinkpad management */
830 sel->active_sinkpad = NULL;
832 gst_segment_init (&sel->segment, GST_FORMAT_UNDEFINED);
834 sel->lock = g_mutex_new ();
835 sel->cond = g_cond_new ();
836 sel->blocked = FALSE;
838 sel->select_all = FALSE;
842 gst_input_selector_dispose (GObject * object)
844 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
846 if (sel->active_sinkpad) {
847 gst_object_unref (sel->active_sinkpad);
848 sel->active_sinkpad = NULL;
851 g_mutex_free (sel->lock);
855 g_cond_free (sel->cond);
859 G_OBJECT_CLASS (parent_class)->dispose (object);
862 /* Solve the following equation for B.timestamp, and set that as the segment
864 * B.running_time = (B.timestamp - NS.start) / NS.abs_rate + NS.accum
867 gst_segment_get_timestamp (GstSegment * segment, gint64 running_time)
869 return (running_time - segment->accum) * segment->abs_rate + segment->start;
873 gst_segment_set_stop (GstSegment * segment, gint64 running_time)
875 segment->stop = gst_segment_get_timestamp (segment, running_time);
876 segment->last_stop = -1;
880 gst_segment_set_start (GstSegment * segment, gint64 running_time)
882 gint64 new_start, duration;
884 new_start = gst_segment_get_timestamp (segment, running_time);
886 /* this is the duration we skipped */
887 duration = new_start - segment->start;
888 /* add the duration to the accumulated segment time */
889 segment->accum += duration;
890 /* move position in the segment */
891 segment->time += duration;
892 segment->start += duration;
895 /* this function must be called with the SELECTOR_LOCK. It returns TRUE when the
896 * active pad changed. */
898 gst_input_selector_set_active_pad (GstInputSelector * self,
899 GstPad * pad, gint64 stop_time, gint64 start_time)
901 GstSelectorPad *old, *new;
902 GstPad **active_pad_p;
904 if (pad == self->active_sinkpad)
907 old = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
908 new = GST_SELECTOR_PAD_CAST (pad);
910 GST_DEBUG_OBJECT (self, "setting active pad to %s:%s",
911 GST_DEBUG_PAD_NAME (new));
913 if (stop_time == -1 && old) {
914 /* no stop time given, get the latest running_time on the active pad to
915 * close and open the new segment */
916 stop_time = start_time = gst_selector_pad_get_running_time (old);
917 GST_DEBUG_OBJECT (self, "using start/stop of %" G_GINT64_FORMAT,
921 if (old && old->active && !self->pending_close && stop_time >= 0) {
922 /* schedule a last_stop update if one isn't already scheduled, and a
923 segment has been pushed before. */
924 memcpy (&self->segment, &old->segment, sizeof (self->segment));
926 GST_DEBUG_OBJECT (self, "setting stop_time to %" G_GINT64_FORMAT,
928 gst_segment_set_stop (&self->segment, stop_time);
929 self->pending_close = TRUE;
932 if (new && new->active && start_time >= 0) {
933 GST_DEBUG_OBJECT (self, "setting start_time to %" G_GINT64_FORMAT,
935 /* schedule a new segment push */
936 gst_segment_set_start (&new->segment, start_time);
937 new->segment_pending = TRUE;
940 active_pad_p = &self->active_sinkpad;
941 gst_object_replace ((GstObject **) active_pad_p, GST_OBJECT_CAST (pad));
942 GST_DEBUG_OBJECT (self, "New active pad is %" GST_PTR_FORMAT,
943 self->active_sinkpad);
949 gst_input_selector_set_property (GObject * object, guint prop_id,
950 const GValue * value, GParamSpec * pspec)
952 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
955 case PROP_ACTIVE_PAD:
959 pad = g_value_get_object (value);
961 GST_INPUT_SELECTOR_LOCK (sel);
962 gst_input_selector_set_active_pad (sel, pad,
963 GST_CLOCK_TIME_NONE, GST_CLOCK_TIME_NONE);
964 GST_INPUT_SELECTOR_UNLOCK (sel);
967 case PROP_SELECT_ALL:
968 GST_INPUT_SELECTOR_LOCK (object);
969 sel->select_all = g_value_get_boolean (value);
970 GST_INPUT_SELECTOR_UNLOCK (object);
973 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
979 gst_input_selector_get_property (GObject * object, guint prop_id,
980 GValue * value, GParamSpec * pspec)
982 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
986 GST_INPUT_SELECTOR_LOCK (object);
987 g_value_set_uint (value, sel->n_pads);
988 GST_INPUT_SELECTOR_UNLOCK (object);
990 case PROP_ACTIVE_PAD:
991 GST_INPUT_SELECTOR_LOCK (object);
992 g_value_set_object (value, sel->active_sinkpad);
993 GST_INPUT_SELECTOR_UNLOCK (object);
995 case PROP_SELECT_ALL:
996 GST_INPUT_SELECTOR_LOCK (object);
997 g_value_set_boolean (value, sel->select_all);
998 GST_INPUT_SELECTOR_UNLOCK (object);
1001 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1007 gst_input_selector_get_linked_pad (GstPad * pad, gboolean strict)
1009 GstInputSelector *sel;
1010 GstPad *otherpad = NULL;
1012 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
1014 GST_INPUT_SELECTOR_LOCK (sel);
1015 if (pad == sel->srcpad)
1016 otherpad = sel->active_sinkpad;
1017 else if (pad == sel->active_sinkpad || !strict)
1018 otherpad = sel->srcpad;
1020 gst_object_ref (otherpad);
1021 GST_INPUT_SELECTOR_UNLOCK (sel);
1023 gst_object_unref (sel);
1029 gst_input_selector_event (GstPad * pad, GstEvent * event)
1031 gboolean res = FALSE;
1034 otherpad = gst_input_selector_get_linked_pad (pad, TRUE);
1037 res = gst_pad_push_event (otherpad, event);
1039 gst_object_unref (otherpad);
1042 gst_event_unref (event);
1046 /* query on the srcpad. We override this function because by default it will
1047 * only forward the query to one random sinkpad */
1049 gst_input_selector_query (GstPad * pad, GstQuery * query)
1051 gboolean res = TRUE;
1052 GstInputSelector *sel;
1055 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (pad));
1057 otherpad = gst_input_selector_get_linked_pad (pad, TRUE);
1059 switch (GST_QUERY_TYPE (query)) {
1060 case GST_QUERY_LATENCY:
1063 GstClockTime resmin, resmax;
1070 /* assume FALSE, we become TRUE if one query succeeds */
1073 /* perform the query on all sinkpads and combine the results. We take the
1074 * max of min and the min of max for the result latency. */
1075 GST_INPUT_SELECTOR_LOCK (sel);
1076 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk;
1077 walk = g_list_next (walk)) {
1078 GstPad *sinkpad = GST_PAD_CAST (walk->data);
1080 if (gst_pad_peer_query (sinkpad, query)) {
1081 GstClockTime min, max;
1084 /* one query succeeded, we succeed too */
1087 gst_query_parse_latency (query, &live, &min, &max);
1089 GST_DEBUG_OBJECT (sinkpad,
1090 "peer latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
1091 ", live %d", GST_TIME_ARGS (min), GST_TIME_ARGS (max), live);
1098 else if (max < resmax)
1100 if (reslive == FALSE)
1105 GST_INPUT_SELECTOR_UNLOCK (sel);
1107 gst_query_set_latency (query, reslive, resmin, resmax);
1109 GST_DEBUG_OBJECT (sel,
1110 "total latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
1111 ", live %d", GST_TIME_ARGS (resmin), GST_TIME_ARGS (resmax),
1119 res = gst_pad_peer_query (otherpad, query);
1123 gst_object_unref (otherpad);
1124 gst_object_unref (sel);
1130 gst_input_selector_getcaps (GstPad * pad)
1136 parent = gst_object_get_parent (GST_OBJECT (pad));
1138 otherpad = gst_input_selector_get_linked_pad (pad, FALSE);
1141 if (GST_INPUT_SELECTOR (parent)->select_all) {
1142 GST_DEBUG_OBJECT (parent,
1143 "Pad %s:%s not linked, returning merge of caps",
1144 GST_DEBUG_PAD_NAME (pad));
1145 caps = gst_pad_proxy_getcaps (pad);
1147 GST_DEBUG_OBJECT (parent,
1148 "Pad %s:%s not linked, returning ANY", GST_DEBUG_PAD_NAME (pad));
1149 caps = gst_caps_new_any ();
1152 GST_DEBUG_OBJECT (parent,
1153 "Pad %s:%s is linked (to %s:%s), returning peer caps",
1154 GST_DEBUG_PAD_NAME (pad), GST_DEBUG_PAD_NAME (otherpad));
1155 /* if the peer has caps, use those. If the pad is not linked, this function
1156 * returns NULL and we return ANY */
1157 if (!(caps = gst_pad_peer_get_caps (otherpad)))
1158 caps = gst_caps_new_any ();
1159 gst_object_unref (otherpad);
1162 gst_object_unref (parent);
1166 /* check if the pad is the active sinkpad */
1168 gst_input_selector_is_active_sinkpad (GstInputSelector * sel, GstPad * pad)
1170 GstSelectorPad *selpad;
1173 selpad = GST_SELECTOR_PAD_CAST (pad);
1175 GST_INPUT_SELECTOR_LOCK (sel);
1176 res = (pad == sel->active_sinkpad);
1177 GST_INPUT_SELECTOR_UNLOCK (sel);
1182 /* Get or create the active sinkpad, must be called with SELECTOR_LOCK */
1184 gst_input_selector_activate_sinkpad (GstInputSelector * sel, GstPad * pad)
1186 GstPad *active_sinkpad;
1187 GstSelectorPad *selpad;
1189 selpad = GST_SELECTOR_PAD_CAST (pad);
1191 selpad->active = TRUE;
1192 active_sinkpad = sel->active_sinkpad;
1193 if (active_sinkpad == NULL || sel->select_all) {
1194 /* first pad we get activity on becomes the activated pad by default, if we
1195 * select all, we also remember the last used pad. */
1196 if (sel->active_sinkpad)
1197 gst_object_unref (sel->active_sinkpad);
1198 active_sinkpad = sel->active_sinkpad = gst_object_ref (pad);
1199 GST_DEBUG_OBJECT (sel, "Activating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1202 return active_sinkpad;
1206 gst_input_selector_request_new_pad (GstElement * element,
1207 GstPadTemplate * templ, const gchar * unused)
1209 GstInputSelector *sel;
1211 GstPad *sinkpad = NULL;
1213 g_return_val_if_fail (templ->direction == GST_PAD_SINK, NULL);
1215 sel = GST_INPUT_SELECTOR (element);
1217 GST_INPUT_SELECTOR_LOCK (sel);
1219 GST_LOG_OBJECT (sel, "Creating new pad %d", sel->padcount);
1220 name = g_strdup_printf ("sink%d", sel->padcount++);
1221 sinkpad = g_object_new (GST_TYPE_SELECTOR_PAD,
1222 "name", name, "direction", templ->direction, "template", templ, NULL);
1227 gst_pad_set_event_function (sinkpad,
1228 GST_DEBUG_FUNCPTR (gst_selector_pad_event));
1229 gst_pad_set_getcaps_function (sinkpad,
1230 GST_DEBUG_FUNCPTR (gst_selector_pad_getcaps));
1231 gst_pad_set_chain_function (sinkpad,
1232 GST_DEBUG_FUNCPTR (gst_selector_pad_chain));
1233 gst_pad_set_internal_link_function (sinkpad,
1234 GST_DEBUG_FUNCPTR (gst_selector_pad_get_linked_pads));
1235 gst_pad_set_bufferalloc_function (sinkpad,
1236 GST_DEBUG_FUNCPTR (gst_selector_pad_bufferalloc));
1238 gst_pad_set_active (sinkpad, TRUE);
1239 gst_element_add_pad (GST_ELEMENT (sel), sinkpad);
1240 GST_INPUT_SELECTOR_UNLOCK (sel);
1246 gst_input_selector_release_pad (GstElement * element, GstPad * pad)
1248 GstInputSelector *sel;
1250 sel = GST_INPUT_SELECTOR (element);
1251 GST_LOG_OBJECT (sel, "Releasing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1253 GST_INPUT_SELECTOR_LOCK (sel);
1254 /* if the pad was the active pad, makes us select a new one */
1255 if (sel->active_sinkpad == pad) {
1256 GST_DEBUG_OBJECT (sel, "Deactivating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1257 gst_object_unref (sel->active_sinkpad);
1258 sel->active_sinkpad = NULL;
1262 gst_pad_set_active (pad, FALSE);
1263 gst_element_remove_pad (GST_ELEMENT (sel), pad);
1264 GST_INPUT_SELECTOR_UNLOCK (sel);
1268 gst_input_selector_reset (GstInputSelector * sel)
1272 GST_INPUT_SELECTOR_LOCK (sel);
1273 /* clear active pad */
1274 if (sel->active_sinkpad) {
1275 gst_object_unref (sel->active_sinkpad);
1276 sel->active_sinkpad = NULL;
1279 gst_segment_init (&sel->segment, GST_FORMAT_UNDEFINED);
1280 sel->pending_close = FALSE;
1281 /* reset each of our sinkpads state */
1282 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
1283 GstSelectorPad *selpad = GST_SELECTOR_PAD_CAST (walk->data);
1285 gst_selector_pad_reset (selpad);
1288 gst_tag_list_free (selpad->tags);
1289 selpad->tags = NULL;
1292 GST_INPUT_SELECTOR_UNLOCK (sel);
1295 static GstStateChangeReturn
1296 gst_input_selector_change_state (GstElement * element,
1297 GstStateChange transition)
1299 GstInputSelector *self = GST_INPUT_SELECTOR (element);
1300 GstStateChangeReturn result;
1302 switch (transition) {
1303 case GST_STATE_CHANGE_READY_TO_PAUSED:
1304 GST_INPUT_SELECTOR_LOCK (self);
1305 self->blocked = FALSE;
1306 self->flushing = FALSE;
1307 GST_INPUT_SELECTOR_UNLOCK (self);
1309 case GST_STATE_CHANGE_PAUSED_TO_READY:
1310 /* first unlock before we call the parent state change function, which
1311 * tries to acquire the stream lock when going to ready. */
1312 GST_INPUT_SELECTOR_LOCK (self);
1313 self->blocked = FALSE;
1314 self->flushing = TRUE;
1315 GST_INPUT_SELECTOR_BROADCAST (self);
1316 GST_INPUT_SELECTOR_UNLOCK (self);
1322 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1324 switch (transition) {
1325 case GST_STATE_CHANGE_PAUSED_TO_READY:
1326 gst_input_selector_reset (self);
1336 gst_input_selector_block (GstInputSelector * self)
1339 GstSelectorPad *spad;
1341 GST_INPUT_SELECTOR_LOCK (self);
1344 GST_WARNING_OBJECT (self, "switch already blocked");
1346 self->blocked = TRUE;
1347 spad = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
1350 ret = gst_selector_pad_get_running_time (spad);
1352 GST_DEBUG_OBJECT (self, "no active pad while blocking");
1354 GST_INPUT_SELECTOR_UNLOCK (self);
1359 /* stop_time and start_time are running times */
1361 gst_input_selector_switch (GstInputSelector * self, GstPad * pad,
1362 gint64 stop_time, gint64 start_time)
1366 g_return_if_fail (self->blocked == TRUE);
1368 GST_INPUT_SELECTOR_LOCK (self);
1370 gst_input_selector_set_active_pad (self, pad, stop_time, start_time);
1372 self->blocked = FALSE;
1373 GST_INPUT_SELECTOR_BROADCAST (self);
1374 GST_INPUT_SELECTOR_UNLOCK (self);
1377 g_object_notify (G_OBJECT (self), "active-pad");
1381 gst_input_selector_check_eos (GstElement * selector)
1383 GstIterator *it = gst_element_iterate_sink_pads (selector);
1384 GstIteratorResult ires;
1386 gboolean done = FALSE, is_eos = FALSE;
1387 GstSelectorPad *pad;
1390 ires = gst_iterator_next (it, &item);
1392 case GST_ITERATOR_DONE:
1393 GST_INFO_OBJECT (selector, "all sink pads have eos");
1397 case GST_ITERATOR_OK:
1398 pad = GST_SELECTOR_PAD_CAST (item);
1403 case GST_ITERATOR_RESYNC:
1404 gst_iterator_resync (it);
1411 gst_iterator_free (it);