1 /* GStreamer input selector
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>)
8 * Copyright (C) 2011 Sebastian Dröge <sebastian.droege@collabora.co.uk>
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Library General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Library General Public License for more details.
20 * You should have received a copy of the GNU Library General Public
21 * License along with this library; if not, write to the
22 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
23 * Boston, MA 02110-1301, USA.
27 * SECTION:element-input-selector
28 * @see_also: #GstOutputSelector
30 * Direct one out of N input streams to the output pad.
32 * The input pads are from a GstPad subclass and have additional
33 * properties, which users may find useful, namely:
37 * "running-time": Running time of stream on pad (#gint64)
40 * "tags": The currently active tags on the pad (#GstTagList, boxed type)
43 * "active": If the pad is currently active (#gboolean)
46 * "always-ok" : Make an inactive pads return #GST_FLOW_OK instead of
47 * #GST_FLOW_NOT_LINKED
58 #include "gstinputselector.h"
60 #define DEBUG_CACHED_BUFFERS 0
62 GST_DEBUG_CATEGORY_STATIC (input_selector_debug);
63 #define GST_CAT_DEFAULT input_selector_debug
65 #define GST_TYPE_INPUT_SELECTOR_SYNC_MODE (gst_input_selector_sync_mode_get_type())
67 gst_input_selector_sync_mode_get_type (void)
69 static GType type = 0;
70 static const GEnumValue data[] = {
71 {GST_INPUT_SELECTOR_SYNC_MODE_ACTIVE_SEGMENT,
72 "Sync using the current active segment",
74 {GST_INPUT_SELECTOR_SYNC_MODE_CLOCK, "Sync using the clock", "clock"},
79 type = g_enum_register_static ("GstInputSelectorSyncMode", data);
84 #define GST_INPUT_SELECTOR_GET_LOCK(sel) (&((GstInputSelector*)(sel))->lock)
85 #define GST_INPUT_SELECTOR_GET_COND(sel) (&((GstInputSelector*)(sel))->cond)
86 #define GST_INPUT_SELECTOR_LOCK(sel) (g_mutex_lock (GST_INPUT_SELECTOR_GET_LOCK(sel)))
87 #define GST_INPUT_SELECTOR_UNLOCK(sel) (g_mutex_unlock (GST_INPUT_SELECTOR_GET_LOCK(sel)))
88 #define GST_INPUT_SELECTOR_WAIT(sel) (g_cond_wait (GST_INPUT_SELECTOR_GET_COND(sel), \
89 GST_INPUT_SELECTOR_GET_LOCK(sel)))
90 #define GST_INPUT_SELECTOR_BROADCAST(sel) (g_cond_broadcast (GST_INPUT_SELECTOR_GET_COND(sel)))
92 static GstStaticPadTemplate gst_input_selector_sink_factory =
93 GST_STATIC_PAD_TEMPLATE ("sink_%u",
98 static GstStaticPadTemplate gst_input_selector_src_factory =
99 GST_STATIC_PAD_TEMPLATE ("src",
102 GST_STATIC_CAPS_ANY);
114 #define DEFAULT_SYNC_STREAMS TRUE
115 #define DEFAULT_SYNC_MODE GST_INPUT_SELECTOR_SYNC_MODE_ACTIVE_SEGMENT
116 #define DEFAULT_CACHE_BUFFERS FALSE
117 #define DEFAULT_PAD_ALWAYS_OK TRUE
122 PROP_PAD_RUNNING_TIME,
128 static void gst_input_selector_active_pad_changed (GstInputSelector * sel,
129 GParamSpec * pspec, gpointer user_data);
130 static inline gboolean gst_input_selector_is_active_sinkpad (GstInputSelector *
132 static GstPad *gst_input_selector_get_active_sinkpad (GstInputSelector * sel);
133 static GstPad *gst_input_selector_get_linked_pad (GstInputSelector * sel,
134 GstPad * pad, gboolean strict);
136 #define GST_TYPE_SELECTOR_PAD \
137 (gst_selector_pad_get_type())
138 #define GST_SELECTOR_PAD(obj) \
139 (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_SELECTOR_PAD, GstSelectorPad))
140 #define GST_SELECTOR_PAD_CLASS(klass) \
141 (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_SELECTOR_PAD, GstSelectorPadClass))
142 #define GST_IS_SELECTOR_PAD(obj) \
143 (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_SELECTOR_PAD))
144 #define GST_IS_SELECTOR_PAD_CLASS(klass) \
145 (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_SELECTOR_PAD))
146 #define GST_SELECTOR_PAD_CAST(obj) \
147 ((GstSelectorPad *)(obj))
149 typedef struct _GstSelectorPad GstSelectorPad;
150 typedef struct _GstSelectorPadClass GstSelectorPadClass;
151 typedef struct _GstSelectorPadCachedBuffer GstSelectorPadCachedBuffer;
153 struct _GstSelectorPad
157 gboolean pushed; /* when buffer was pushed downstream since activation */
158 gboolean eos; /* when EOS has been received */
159 gboolean eos_sent; /* when EOS was sent downstream */
160 gboolean discont; /* after switching we create a discont */
161 gboolean flushing; /* set after flush-start and before flush-stop */
163 GstTagList *tags; /* last tags received on the pad */
165 GstSegment segment; /* the current segment on the pad */
166 guint32 segment_seqnum; /* sequence number of the current segment */
168 gboolean events_pending; /* TRUE if sticky events need to be updated */
170 gboolean sending_cached_buffers;
171 GQueue *cached_buffers;
174 struct _GstSelectorPadCachedBuffer
180 struct _GstSelectorPadClass
185 GType gst_selector_pad_get_type (void);
186 static void gst_selector_pad_finalize (GObject * object);
187 static void gst_selector_pad_get_property (GObject * object,
188 guint prop_id, GValue * value, GParamSpec * pspec);
189 static void gst_selector_pad_set_property (GObject * object,
190 guint prop_id, const GValue * value, GParamSpec * pspec);
192 static gint64 gst_selector_pad_get_running_time (GstSelectorPad * pad);
193 static void gst_selector_pad_reset (GstSelectorPad * pad);
194 static gboolean gst_selector_pad_event (GstPad * pad, GstObject * parent,
196 static gboolean gst_selector_pad_query (GstPad * pad, GstObject * parent,
198 static GstIterator *gst_selector_pad_iterate_linked_pads (GstPad * pad,
200 static GstFlowReturn gst_selector_pad_chain (GstPad * pad, GstObject * parent,
202 static void gst_selector_pad_cache_buffer (GstSelectorPad * selpad,
204 static void gst_selector_pad_free_cached_buffers (GstSelectorPad * selpad);
206 G_DEFINE_TYPE (GstSelectorPad, gst_selector_pad, GST_TYPE_PAD);
209 gst_selector_pad_class_init (GstSelectorPadClass * klass)
211 GObjectClass *gobject_class;
213 gobject_class = (GObjectClass *) klass;
215 gobject_class->finalize = gst_selector_pad_finalize;
217 gobject_class->get_property = gst_selector_pad_get_property;
218 gobject_class->set_property = gst_selector_pad_set_property;
220 g_object_class_install_property (gobject_class, PROP_PAD_RUNNING_TIME,
221 g_param_spec_int64 ("running-time", "Running time",
222 "Running time of stream on pad", 0, G_MAXINT64, 0,
223 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
224 g_object_class_install_property (gobject_class, PROP_PAD_TAGS,
225 g_param_spec_boxed ("tags", "Tags",
226 "The currently active tags on the pad", GST_TYPE_TAG_LIST,
227 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
228 g_object_class_install_property (gobject_class, PROP_PAD_ACTIVE,
229 g_param_spec_boolean ("active", "Active",
230 "If the pad is currently active", FALSE,
231 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
232 /* FIXME: better property name? */
233 g_object_class_install_property (gobject_class, PROP_PAD_ALWAYS_OK,
234 g_param_spec_boolean ("always-ok", "Always OK",
235 "Make an inactive pad return OK instead of NOT_LINKED",
236 DEFAULT_PAD_ALWAYS_OK, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
240 gst_selector_pad_init (GstSelectorPad * pad)
242 pad->always_ok = DEFAULT_PAD_ALWAYS_OK;
243 gst_selector_pad_reset (pad);
247 gst_selector_pad_finalize (GObject * object)
251 pad = GST_SELECTOR_PAD_CAST (object);
254 gst_tag_list_unref (pad->tags);
255 gst_selector_pad_free_cached_buffers (pad);
257 G_OBJECT_CLASS (gst_selector_pad_parent_class)->finalize (object);
261 gst_selector_pad_set_property (GObject * object, guint prop_id,
262 const GValue * value, GParamSpec * pspec)
264 GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
267 case PROP_PAD_ALWAYS_OK:
268 GST_OBJECT_LOCK (object);
269 spad->always_ok = g_value_get_boolean (value);
270 GST_OBJECT_UNLOCK (object);
273 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
279 gst_selector_pad_get_property (GObject * object, guint prop_id,
280 GValue * value, GParamSpec * pspec)
282 GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
285 case PROP_PAD_RUNNING_TIME:
286 g_value_set_int64 (value, gst_selector_pad_get_running_time (spad));
289 GST_OBJECT_LOCK (object);
290 g_value_set_boxed (value, spad->tags);
291 GST_OBJECT_UNLOCK (object);
293 case PROP_PAD_ACTIVE:
295 GstInputSelector *sel;
297 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (spad));
299 g_value_set_boolean (value, gst_input_selector_is_active_sinkpad (sel,
300 GST_PAD_CAST (spad)));
301 gst_object_unref (sel);
303 g_value_set_boolean (value, FALSE);
307 case PROP_PAD_ALWAYS_OK:
308 GST_OBJECT_LOCK (object);
309 g_value_set_boolean (value, spad->always_ok);
310 GST_OBJECT_UNLOCK (object);
313 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
319 gst_selector_pad_get_running_time (GstSelectorPad * pad)
323 GST_OBJECT_LOCK (pad);
324 if (pad->segment.format == GST_FORMAT_TIME) {
326 gst_segment_to_running_time (&pad->segment, pad->segment.format,
327 pad->segment.position);
329 GST_OBJECT_UNLOCK (pad);
331 GST_DEBUG_OBJECT (pad, "running time: %" GST_TIME_FORMAT
332 " segment: %" GST_SEGMENT_FORMAT, GST_TIME_ARGS (ret), &pad->segment);
337 /* must be called with the SELECTOR_LOCK */
339 gst_selector_pad_reset (GstSelectorPad * pad)
341 GST_OBJECT_LOCK (pad);
344 pad->eos_sent = FALSE;
345 pad->events_pending = FALSE;
346 pad->discont = FALSE;
347 pad->flushing = FALSE;
348 gst_segment_init (&pad->segment, GST_FORMAT_UNDEFINED);
349 pad->sending_cached_buffers = FALSE;
350 gst_selector_pad_free_cached_buffers (pad);
351 GST_OBJECT_UNLOCK (pad);
354 static GstSelectorPadCachedBuffer *
355 gst_selector_pad_new_cached_buffer (GstSelectorPad * selpad, GstBuffer * buffer)
357 GstSelectorPadCachedBuffer *cached_buffer =
358 g_slice_new (GstSelectorPadCachedBuffer);
359 cached_buffer->buffer = buffer;
360 cached_buffer->segment = selpad->segment;
361 return cached_buffer;
365 gst_selector_pad_free_cached_buffer (GstSelectorPadCachedBuffer * cached_buffer)
367 if (cached_buffer->buffer)
368 gst_buffer_unref (cached_buffer->buffer);
369 g_slice_free (GstSelectorPadCachedBuffer, cached_buffer);
372 /* must be called with the SELECTOR_LOCK */
374 gst_selector_pad_cache_buffer (GstSelectorPad * selpad, GstBuffer * buffer)
376 if (selpad->segment.format != GST_FORMAT_TIME) {
377 GST_DEBUG_OBJECT (selpad, "Buffer %p with segment not in time format, "
378 "not caching", buffer);
382 GST_DEBUG_OBJECT (selpad, "Caching buffer %p", buffer);
383 if (!selpad->cached_buffers)
384 selpad->cached_buffers = g_queue_new ();
385 g_queue_push_tail (selpad->cached_buffers,
386 gst_selector_pad_new_cached_buffer (selpad, buffer));
389 /* must be called with the SELECTOR_LOCK */
391 gst_selector_pad_free_cached_buffers (GstSelectorPad * selpad)
393 if (!selpad->cached_buffers)
396 GST_DEBUG_OBJECT (selpad, "Freeing cached buffers");
397 g_queue_free_full (selpad->cached_buffers,
398 (GDestroyNotify) gst_selector_pad_free_cached_buffer);
399 selpad->cached_buffers = NULL;
402 /* strictly get the linked pad from the sinkpad. If the pad is active we return
403 * the srcpad else we return NULL */
405 gst_selector_pad_iterate_linked_pads (GstPad * pad, GstObject * parent)
407 GstInputSelector *sel;
409 GstIterator *it = NULL;
412 sel = GST_INPUT_SELECTOR (parent);
414 otherpad = gst_input_selector_get_linked_pad (sel, pad, TRUE);
416 g_value_init (&val, GST_TYPE_PAD);
417 g_value_set_object (&val, otherpad);
418 it = gst_iterator_new_single (GST_TYPE_PAD, &val);
419 g_value_unset (&val);
420 gst_object_unref (otherpad);
427 forward_sticky_events (GstPad * sinkpad, GstEvent ** event, gpointer user_data)
429 GstInputSelector *sel = GST_INPUT_SELECTOR (user_data);
431 GST_DEBUG_OBJECT (sinkpad, "forward sticky event %" GST_PTR_FORMAT, *event);
433 if (GST_EVENT_TYPE (*event) == GST_EVENT_SEGMENT) {
434 GstSegment *seg = &GST_SELECTOR_PAD (sinkpad)->segment;
437 e = gst_event_new_segment (seg);
438 gst_event_set_seqnum (e, GST_SELECTOR_PAD_CAST (sinkpad)->segment_seqnum);
440 gst_pad_push_event (sel->srcpad, e);
441 } else if (GST_EVENT_TYPE (*event) == GST_EVENT_STREAM_START
442 && !sel->have_group_id) {
444 gst_pad_get_sticky_event (sel->srcpad, GST_EVENT_STREAM_START, 0);
446 /* Only push stream-start once if not all our streams have a stream-id */
448 gst_pad_push_event (sel->srcpad, gst_event_ref (*event));
450 gst_event_unref (tmp);
453 gst_pad_push_event (sel->srcpad, gst_event_ref (*event));
460 gst_input_selector_eos_wait (GstInputSelector * self, GstSelectorPad * pad,
461 GstEvent * eos_event)
463 while (!self->eos && !self->flushing && !pad->flushing) {
464 GstPad *active_sinkpad;
465 active_sinkpad = gst_input_selector_get_active_sinkpad (self);
466 if (pad == GST_SELECTOR_PAD_CAST (active_sinkpad) && pad->eos
468 GST_DEBUG_OBJECT (pad, "send EOS event");
469 GST_INPUT_SELECTOR_UNLOCK (self);
470 /* if we have a pending events, push them now */
471 if (pad->events_pending) {
472 gst_pad_sticky_events_foreach (GST_PAD_CAST (pad),
473 forward_sticky_events, self);
474 pad->events_pending = FALSE;
477 gst_pad_push_event (self->srcpad, gst_event_ref (eos_event));
478 GST_INPUT_SELECTOR_LOCK (self);
479 pad->eos_sent = TRUE;
481 /* we can be unlocked here when we are shutting down (flushing) or when we
483 GST_INPUT_SELECTOR_WAIT (self);
487 return self->flushing;
491 gst_input_selector_all_eos (GstInputSelector * sel)
495 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = walk->next) {
496 GstSelectorPad *selpad;
498 selpad = GST_SELECTOR_PAD_CAST (walk->data);
509 gst_selector_pad_event (GstPad * pad, GstObject * parent, GstEvent * event)
513 gboolean new_tags = FALSE;
514 GstInputSelector *sel;
515 GstSelectorPad *selpad;
516 GstPad *prev_active_sinkpad;
517 GstPad *active_sinkpad;
519 sel = GST_INPUT_SELECTOR (parent);
520 selpad = GST_SELECTOR_PAD_CAST (pad);
521 GST_DEBUG_OBJECT (selpad, "received event %" GST_PTR_FORMAT, event);
523 GST_INPUT_SELECTOR_LOCK (sel);
524 prev_active_sinkpad =
525 sel->active_sinkpad ? gst_object_ref (sel->active_sinkpad) : NULL;
526 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
527 gst_object_ref (active_sinkpad);
528 GST_INPUT_SELECTOR_UNLOCK (sel);
530 if (prev_active_sinkpad != active_sinkpad) {
531 if (prev_active_sinkpad)
532 g_object_notify (G_OBJECT (prev_active_sinkpad), "active");
533 g_object_notify (G_OBJECT (active_sinkpad), "active");
534 g_object_notify (G_OBJECT (sel), "active-pad");
536 if (prev_active_sinkpad)
537 gst_object_unref (prev_active_sinkpad);
538 gst_object_unref (active_sinkpad);
540 GST_INPUT_SELECTOR_LOCK (sel);
541 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
543 /* only forward if we are dealing with the active sinkpad */
544 forward = (pad == active_sinkpad);
546 switch (GST_EVENT_TYPE (event)) {
547 case GST_EVENT_STREAM_START:{
550 if (!gst_event_parse_group_id (event, &group_id))
551 sel->have_group_id = FALSE;
554 case GST_EVENT_FLUSH_START:
555 /* Unblock the pad if it's waiting */
556 selpad->flushing = TRUE;
558 GST_INPUT_SELECTOR_BROADCAST (sel);
560 case GST_EVENT_FLUSH_STOP:
561 gst_selector_pad_reset (selpad);
563 case GST_EVENT_SEGMENT:
565 gst_event_copy_segment (event, &selpad->segment);
566 selpad->segment_seqnum = gst_event_get_seqnum (event);
568 GST_DEBUG_OBJECT (pad, "configured SEGMENT %" GST_SEGMENT_FORMAT,
574 GstTagList *tags, *oldtags, *newtags;
576 gst_event_parse_tag (event, &tags);
578 GST_OBJECT_LOCK (selpad);
579 oldtags = selpad->tags;
581 newtags = gst_tag_list_merge (oldtags, tags, GST_TAG_MERGE_REPLACE);
582 selpad->tags = newtags;
583 GST_OBJECT_UNLOCK (selpad);
586 gst_tag_list_unref (oldtags);
587 GST_DEBUG_OBJECT (pad, "received tags %" GST_PTR_FORMAT, newtags);
594 GST_DEBUG_OBJECT (pad, "received EOS");
595 if (gst_input_selector_all_eos (sel)) {
596 GST_DEBUG_OBJECT (pad, "All sink pad received EOS");
598 GST_INPUT_SELECTOR_BROADCAST (sel);
600 gst_input_selector_eos_wait (sel, selpad, event);
605 GstClockTime ts, dur;
607 GST_DEBUG_OBJECT (pad, "Received gap event: %" GST_PTR_FORMAT, event);
609 gst_event_parse_gap (event, &ts, &dur);
610 if (GST_CLOCK_TIME_IS_VALID (ts)) {
611 if (GST_CLOCK_TIME_IS_VALID (dur))
614 /* update the segment position */
615 GST_OBJECT_LOCK (pad);
616 selpad->segment.position = ts;
617 GST_OBJECT_UNLOCK (pad);
618 if (sel->sync_streams && active_sinkpad == pad)
619 GST_INPUT_SELECTOR_BROADCAST (sel);
627 GST_INPUT_SELECTOR_UNLOCK (sel);
629 g_object_notify (G_OBJECT (selpad), "tags");
631 GST_DEBUG_OBJECT (pad, "forwarding event");
632 res = gst_pad_push_event (sel->srcpad, event);
634 /* If we aren't forwarding the event because the pad is not the
635 * active_sinkpad, then set the flag on the pad
636 * that says a segment needs sending if/when that pad is activated.
637 * For all other cases, we send the event immediately, which makes
638 * sparse streams and other segment updates work correctly downstream.
640 if (GST_EVENT_IS_STICKY (event))
641 selpad->events_pending = TRUE;
642 gst_event_unref (event);
649 gst_selector_pad_query (GstPad * pad, GstObject * parent, GstQuery * query)
651 gboolean res = FALSE;
652 GstInputSelector *self = (GstInputSelector *) parent;
654 switch (GST_QUERY_TYPE (query)) {
656 /* always proxy caps query, regardless of active pad or not */
657 res = gst_pad_peer_query (self->srcpad, query);
659 case GST_QUERY_ALLOCATION:{
660 GstPad *active_sinkpad;
661 GstInputSelector *sel = GST_INPUT_SELECTOR (parent);
663 /* Only do the allocation query for the active sinkpad,
664 * after switching a reconfigure event is sent and upstream
665 * should reconfigure and do a new allocation query
667 if (GST_PAD_DIRECTION (pad) == GST_PAD_SINK) {
668 GST_INPUT_SELECTOR_LOCK (sel);
669 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
670 GST_INPUT_SELECTOR_UNLOCK (sel);
672 if (pad != active_sinkpad) {
680 res = gst_pad_query_default (pad, parent, query);
689 gst_input_selector_get_clipped_running_time (GstSegment * seg, GstBuffer * buf)
691 GstClockTime running_time;
693 running_time = GST_BUFFER_PTS (buf);
694 /* If possible try to get the running time at the end of the buffer */
695 if (GST_BUFFER_DURATION_IS_VALID (buf))
696 running_time += GST_BUFFER_DURATION (buf);
697 /* Only use the segment to convert to running time if the segment is
698 * in TIME format, otherwise do our best to try to sync */
699 if (GST_CLOCK_TIME_IS_VALID (seg->stop)) {
700 if (running_time > seg->stop) {
701 running_time = seg->stop;
704 return gst_segment_to_running_time (seg, GST_FORMAT_TIME, running_time);
707 /* must be called without the SELECTOR_LOCK, will wait until the running time
708 * of the active pad is after this pad or return TRUE when flushing */
710 gst_input_selector_wait_running_time (GstInputSelector * sel,
711 GstSelectorPad * selpad, GstBuffer * buf)
715 GST_DEBUG_OBJECT (selpad, "entering wait for buffer %p", buf);
717 /* If we have no valid timestamp we can't sync this buffer */
718 if (!GST_BUFFER_PTS_IS_VALID (buf)) {
719 GST_DEBUG_OBJECT (selpad, "leaving wait for buffer with "
720 "invalid timestamp");
724 seg = &selpad->segment;
727 * a) this is the active pad
728 * b) the pad or the selector is flushing
729 * c) the buffer running time is before the current running time
730 * (either active-seg or clock, depending on sync-mode)
733 GST_INPUT_SELECTOR_LOCK (sel);
735 GstPad *active_sinkpad;
736 GstSelectorPad *active_selpad;
738 gint64 cur_running_time;
739 GstClockTime running_time;
741 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
742 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
744 if (seg->format != GST_FORMAT_TIME) {
745 GST_DEBUG_OBJECT (selpad,
746 "Not waiting because we don't have a TIME segment");
747 GST_INPUT_SELECTOR_UNLOCK (sel);
751 running_time = gst_input_selector_get_clipped_running_time (seg, buf);
752 /* If this is outside the segment don't sync */
753 if (running_time == -1) {
754 GST_DEBUG_OBJECT (selpad,
755 "Not waiting because buffer is outside segment");
756 GST_INPUT_SELECTOR_UNLOCK (sel);
760 cur_running_time = GST_CLOCK_TIME_NONE;
761 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
762 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
764 GstClockTime base_time;
766 cur_running_time = gst_clock_get_time (clock);
767 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
768 if (base_time <= cur_running_time)
769 cur_running_time -= base_time;
771 cur_running_time = 0;
773 gst_object_unref (clock);
776 GstSegment *active_seg;
778 active_seg = &active_selpad->segment;
780 /* If the active segment is configured but not to time format
781 * we can't do any syncing at all */
782 if ((active_seg->format != GST_FORMAT_TIME
783 && active_seg->format != GST_FORMAT_UNDEFINED)) {
784 GST_DEBUG_OBJECT (selpad,
785 "Not waiting because active segment isn't in TIME format");
786 GST_INPUT_SELECTOR_UNLOCK (sel);
790 /* Get active pad's running time, if no configured segment yet keep at -1 */
791 if (active_seg->format == GST_FORMAT_TIME)
792 cur_running_time = gst_segment_to_running_time (active_seg,
793 GST_FORMAT_TIME, active_seg->position);
796 if (selpad != active_selpad && !sel->eos && !sel->flushing
797 && !selpad->flushing && (cur_running_time == GST_CLOCK_TIME_NONE
798 || running_time >= cur_running_time)) {
799 GST_DEBUG_OBJECT (selpad,
800 "Waiting for active streams to advance. %" GST_TIME_FORMAT " >= %"
801 GST_TIME_FORMAT, GST_TIME_ARGS (running_time),
802 GST_TIME_ARGS (cur_running_time));
803 GST_INPUT_SELECTOR_WAIT (sel);
805 GST_INPUT_SELECTOR_UNLOCK (sel);
810 /* Return TRUE if the selector or the pad is flushing */
811 return (sel->flushing || selpad->flushing);
814 #if DEBUG_CACHED_BUFFERS
816 gst_input_selector_debug_cached_buffers (GstInputSelector * sel)
820 if (gst_debug_category_get_threshold (input_selector_debug) < GST_LEVEL_DEBUG)
823 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = walk->next) {
824 GstSelectorPad *selpad;
828 selpad = GST_SELECTOR_PAD_CAST (walk->data);
829 if (!selpad->cached_buffers) {
830 GST_DEBUG_OBJECT (selpad, "Cached buffers timestamps: <none>");
834 timestamps = g_string_new ("Cached buffers timestamps:");
835 for (l = selpad->cached_buffers->head; l != NULL; l = l->next) {
836 GstSelectorPadCachedBuffer *cached_buffer = l->data;
838 g_string_append_printf (timestamps, " %" GST_TIME_FORMAT,
839 GST_TIME_ARGS (GST_BUFFER_PTS (cached_buffer->buffer)));
841 GST_DEBUG_OBJECT (selpad, "%s", timestamps->str);
842 g_string_free (timestamps, TRUE);
847 /* must be called with the SELECTOR_LOCK */
849 gst_input_selector_cleanup_old_cached_buffers (GstInputSelector * sel,
853 gint64 cur_running_time;
856 cur_running_time = GST_CLOCK_TIME_NONE;
857 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
858 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
860 GstClockTime base_time;
862 cur_running_time = gst_clock_get_time (clock);
863 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
864 if (base_time <= cur_running_time)
865 cur_running_time -= base_time;
867 cur_running_time = 0;
869 gst_object_unref (clock);
872 GstPad *active_sinkpad;
873 GstSelectorPad *active_selpad;
874 GstSegment *active_seg;
876 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
877 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
878 active_seg = &active_selpad->segment;
880 /* Get active pad's running time, if no configured segment yet keep at -1 */
881 if (active_seg->format == GST_FORMAT_TIME)
882 cur_running_time = gst_segment_to_running_time (active_seg,
883 GST_FORMAT_TIME, active_seg->position);
886 if (!GST_CLOCK_TIME_IS_VALID (cur_running_time))
889 GST_DEBUG_OBJECT (sel, "Cleaning up old cached buffers");
890 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
891 GstSelectorPad *selpad;
893 GstSelectorPadCachedBuffer *cached_buffer;
894 GSList *maybe_remove;
895 guint queue_position;
897 selpad = GST_SELECTOR_PAD_CAST (walk->data);
898 if (!selpad->cached_buffers)
901 seg = &selpad->segment;
905 while ((cached_buffer = g_queue_peek_nth (selpad->cached_buffers,
907 GstBuffer *buffer = cached_buffer->buffer;
908 GstClockTime running_time;
911 /* If we have no valid timestamp we can't sync this buffer */
912 if (!GST_BUFFER_PTS_IS_VALID (buffer)) {
913 maybe_remove = g_slist_append (maybe_remove, cached_buffer);
914 queue_position = g_slist_length (maybe_remove);
918 /* the buffer is still valid if its duration is valid and the
919 * timestamp + duration is >= time, or if its duration is invalid
920 * and the timestamp is >= time */
921 running_time = gst_input_selector_get_clipped_running_time (seg, buffer);
922 GST_DEBUG_OBJECT (selpad,
923 "checking if buffer %p running time=%" GST_TIME_FORMAT
924 " >= stream time=%" GST_TIME_FORMAT, buffer,
925 GST_TIME_ARGS (running_time), GST_TIME_ARGS (cur_running_time));
926 if (running_time >= cur_running_time) {
930 GST_DEBUG_OBJECT (selpad, "Removing old cached buffer %p", buffer);
931 g_queue_pop_nth (selpad->cached_buffers, queue_position);
932 gst_selector_pad_free_cached_buffer (cached_buffer);
934 for (l = maybe_remove; l != NULL; l = g_slist_next (l)) {
935 /* A buffer after some invalid buffers was removed, it means the invalid buffers
936 * are old, lets also remove them */
937 cached_buffer = l->data;
938 g_queue_remove (selpad->cached_buffers, cached_buffer);
939 gst_selector_pad_free_cached_buffer (cached_buffer);
942 g_slist_free (maybe_remove);
947 g_slist_free (maybe_remove);
950 if (g_queue_is_empty (selpad->cached_buffers)) {
951 g_queue_free (selpad->cached_buffers);
952 selpad->cached_buffers = NULL;
956 #if DEBUG_CACHED_BUFFERS
957 gst_input_selector_debug_cached_buffers (sel);
962 gst_selector_pad_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
964 GstInputSelector *sel;
966 GstPad *active_sinkpad;
967 GstPad *prev_active_sinkpad = NULL;
968 GstSelectorPad *selpad;
970 sel = GST_INPUT_SELECTOR (parent);
971 selpad = GST_SELECTOR_PAD_CAST (pad);
973 GST_DEBUG_OBJECT (selpad,
974 "entering chain for buf %p with timestamp %" GST_TIME_FORMAT, buf,
975 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
977 GST_INPUT_SELECTOR_LOCK (sel);
980 GST_INPUT_SELECTOR_UNLOCK (sel);
984 GST_LOG_OBJECT (pad, "getting active pad");
986 prev_active_sinkpad =
987 sel->active_sinkpad ? gst_object_ref (sel->active_sinkpad) : NULL;
988 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
990 /* In sync mode wait until the active pad has advanced
991 * after the running time of the current buffer */
992 if (sel->sync_streams) {
993 /* call chain for each cached buffer if we are not the active pad
994 * or if we are the active pad but didn't push anything yet. */
995 if (active_sinkpad != pad || !selpad->pushed) {
996 /* no need to check for sel->cache_buffers as selpad->cached_buffers
997 * will only be valid if cache_buffers is TRUE */
998 if (selpad->cached_buffers && !selpad->sending_cached_buffers) {
999 GstSelectorPadCachedBuffer *cached_buffer;
1000 GstSegment saved_segment;
1002 saved_segment = selpad->segment;
1004 selpad->sending_cached_buffers = TRUE;
1005 while (!sel->eos && !sel->flushing && !selpad->flushing &&
1006 (cached_buffer = g_queue_pop_head (selpad->cached_buffers))) {
1007 GST_DEBUG_OBJECT (pad, "Cached buffers found, "
1008 "invoking chain for cached buffer %p", cached_buffer->buffer);
1010 selpad->segment = cached_buffer->segment;
1011 selpad->events_pending = TRUE;
1012 GST_INPUT_SELECTOR_UNLOCK (sel);
1013 gst_selector_pad_chain (pad, parent, cached_buffer->buffer);
1014 GST_INPUT_SELECTOR_LOCK (sel);
1016 /* We just passed the ownership of the buffer to the chain function */
1017 cached_buffer->buffer = NULL;
1018 gst_selector_pad_free_cached_buffer (cached_buffer);
1020 /* we may have cleaned up the queue in the meantime because of
1022 if (!selpad->cached_buffers) {
1026 selpad->sending_cached_buffers = FALSE;
1028 /* all cached buffers sent, restore segment for current buffer */
1029 selpad->segment = saved_segment;
1030 selpad->events_pending = TRUE;
1032 /* Might have changed while calling chain for cached buffers */
1033 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1037 if (active_sinkpad != pad) {
1038 GST_INPUT_SELECTOR_UNLOCK (sel);
1039 if (gst_input_selector_wait_running_time (sel, selpad, buf))
1041 GST_INPUT_SELECTOR_LOCK (sel);
1044 /* Might have changed while waiting */
1045 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1048 /* update the segment on the srcpad */
1049 if (GST_BUFFER_PTS_IS_VALID (buf)) {
1050 GstClockTime start_time = GST_BUFFER_PTS (buf);
1052 GST_LOG_OBJECT (pad, "received start time %" GST_TIME_FORMAT,
1053 GST_TIME_ARGS (start_time));
1054 if (GST_BUFFER_DURATION_IS_VALID (buf))
1055 GST_LOG_OBJECT (pad, "received end time %" GST_TIME_FORMAT,
1056 GST_TIME_ARGS (start_time + GST_BUFFER_DURATION (buf)));
1058 GST_OBJECT_LOCK (pad);
1059 selpad->segment.position = start_time;
1060 GST_OBJECT_UNLOCK (pad);
1063 /* Ignore buffers from pads except the selected one */
1064 if (pad != active_sinkpad)
1067 /* Tell all non-active pads that we advanced the running time */
1068 if (sel->sync_streams)
1069 GST_INPUT_SELECTOR_BROADCAST (sel);
1071 GST_INPUT_SELECTOR_UNLOCK (sel);
1073 if (prev_active_sinkpad != active_sinkpad) {
1074 if (prev_active_sinkpad)
1075 g_object_notify (G_OBJECT (prev_active_sinkpad), "active");
1076 g_object_notify (G_OBJECT (active_sinkpad), "active");
1077 g_object_notify (G_OBJECT (sel), "active-pad");
1080 /* if we have a pending events, push them now */
1081 if (G_UNLIKELY (prev_active_sinkpad != active_sinkpad
1082 || selpad->events_pending)) {
1083 gst_pad_sticky_events_foreach (GST_PAD_CAST (selpad), forward_sticky_events,
1085 selpad->events_pending = FALSE;
1088 if (prev_active_sinkpad) {
1089 gst_object_unref (prev_active_sinkpad);
1090 prev_active_sinkpad = NULL;
1093 if (selpad->discont) {
1094 buf = gst_buffer_make_writable (buf);
1096 GST_DEBUG_OBJECT (pad, "Marking discont buffer %p", buf);
1097 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
1098 selpad->discont = FALSE;
1102 GST_LOG_OBJECT (pad, "Forwarding buffer %p with timestamp %" GST_TIME_FORMAT,
1103 buf, GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
1105 /* Only make the buffer read-only when necessary */
1106 if (sel->sync_streams && sel->cache_buffers)
1107 buf = gst_buffer_ref (buf);
1108 res = gst_pad_push (sel->srcpad, buf);
1109 GST_LOG_OBJECT (pad, "Buffer %p forwarded result=%d", buf, res);
1111 GST_INPUT_SELECTOR_LOCK (sel);
1113 if (sel->sync_streams && sel->cache_buffers) {
1114 /* Might have changed while pushing */
1115 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1116 /* only set pad to pushed if we are still the active pad */
1117 if (active_sinkpad == pad)
1118 selpad->pushed = TRUE;
1120 /* cache buffer as we may need it again if we change pads */
1121 gst_selector_pad_cache_buffer (selpad, buf);
1122 gst_input_selector_cleanup_old_cached_buffers (sel, pad);
1124 selpad->pushed = TRUE;
1126 GST_INPUT_SELECTOR_UNLOCK (sel);
1130 if (prev_active_sinkpad)
1131 gst_object_unref (prev_active_sinkpad);
1132 prev_active_sinkpad = NULL;
1136 /* dropped buffers */
1139 gboolean active_pad_pushed = GST_SELECTOR_PAD_CAST (active_sinkpad)->pushed;
1141 GST_DEBUG_OBJECT (pad, "Pad not active, discard buffer %p", buf);
1142 /* when we drop a buffer, we're creating a discont on this pad */
1143 selpad->discont = TRUE;
1144 GST_INPUT_SELECTOR_UNLOCK (sel);
1145 gst_buffer_unref (buf);
1147 /* figure out what to return upstream */
1148 GST_OBJECT_LOCK (selpad);
1149 if (selpad->always_ok || !active_pad_pushed)
1152 res = GST_FLOW_NOT_LINKED;
1153 GST_OBJECT_UNLOCK (selpad);
1159 GST_DEBUG_OBJECT (pad, "We are flushing, discard buffer %p", buf);
1160 gst_buffer_unref (buf);
1161 res = GST_FLOW_FLUSHING;
1166 static void gst_input_selector_dispose (GObject * object);
1167 static void gst_input_selector_finalize (GObject * object);
1169 static void gst_input_selector_set_property (GObject * object,
1170 guint prop_id, const GValue * value, GParamSpec * pspec);
1171 static void gst_input_selector_get_property (GObject * object,
1172 guint prop_id, GValue * value, GParamSpec * pspec);
1174 static GstPad *gst_input_selector_request_new_pad (GstElement * element,
1175 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps);
1176 static void gst_input_selector_release_pad (GstElement * element, GstPad * pad);
1178 static GstStateChangeReturn gst_input_selector_change_state (GstElement *
1179 element, GstStateChange transition);
1181 static gboolean gst_input_selector_event (GstPad * pad, GstObject * parent,
1185 GST_DEBUG_CATEGORY_INIT (input_selector_debug, \
1186 "input-selector", 0, "An input stream selector element");
1187 #define gst_input_selector_parent_class parent_class
1188 G_DEFINE_TYPE_WITH_CODE (GstInputSelector, gst_input_selector, GST_TYPE_ELEMENT,
1192 gst_input_selector_class_init (GstInputSelectorClass * klass)
1194 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
1195 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
1197 gobject_class->dispose = gst_input_selector_dispose;
1198 gobject_class->finalize = gst_input_selector_finalize;
1200 gobject_class->set_property = gst_input_selector_set_property;
1201 gobject_class->get_property = gst_input_selector_get_property;
1203 g_object_class_install_property (gobject_class, PROP_N_PADS,
1204 g_param_spec_uint ("n-pads", "Number of Pads",
1205 "The number of sink pads", 0, G_MAXUINT, 0,
1206 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
1208 g_object_class_install_property (gobject_class, PROP_ACTIVE_PAD,
1209 g_param_spec_object ("active-pad", "Active pad",
1210 "The currently active sink pad", GST_TYPE_PAD,
1211 G_PARAM_READWRITE | GST_PARAM_MUTABLE_PLAYING |
1212 G_PARAM_STATIC_STRINGS));
1215 * GstInputSelector:sync-streams
1217 * If set to %TRUE all inactive streams will be synced to the
1218 * running time of the active stream or to the current clock.
1220 * To make sure no buffers are dropped by input-selector
1221 * that might be needed when switching the active pad,
1222 * sync-mode should be set to "clock" and cache-buffers to TRUE.
1224 g_object_class_install_property (gobject_class, PROP_SYNC_STREAMS,
1225 g_param_spec_boolean ("sync-streams", "Sync Streams",
1226 "Synchronize inactive streams to the running time of the active "
1227 "stream or to the current clock",
1228 DEFAULT_SYNC_STREAMS,
1229 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1230 GST_PARAM_MUTABLE_READY));
1233 * GstInputSelector:sync-mode
1235 * Select how input-selector will sync buffers when in sync-streams mode.
1237 * Note that when using the "active-segment" mode, the "active-segment" may
1238 * be ahead of current clock time when switching the active pad, as the current
1239 * active pad may have pushed more buffers than what was displayed/consumed,
1240 * which may cause delays and some missing buffers.
1242 g_object_class_install_property (gobject_class, PROP_SYNC_MODE,
1243 g_param_spec_enum ("sync-mode", "Sync mode",
1244 "Behavior in sync-streams mode", GST_TYPE_INPUT_SELECTOR_SYNC_MODE,
1246 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1247 GST_PARAM_MUTABLE_READY));
1250 * GstInputSelector:cache-buffers
1252 * If set to %TRUE and GstInputSelector:sync-streams is also set to %TRUE,
1253 * the active pad will cache the buffers still considered valid (after current
1254 * running time, see sync-mode) to avoid missing frames if/when the pad is
1257 * The active pad may push more buffers than what is currently displayed/consumed
1258 * and when changing pads those buffers will be discarded and the only way to
1259 * reactivate that pad without loosing the already consumed buffers is to enable cache.
1261 g_object_class_install_property (gobject_class, PROP_CACHE_BUFFERS,
1262 g_param_spec_boolean ("cache-buffers", "Cache Buffers",
1263 "Cache buffers for active-pad",
1264 DEFAULT_CACHE_BUFFERS,
1265 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1266 GST_PARAM_MUTABLE_READY));
1268 gst_element_class_set_static_metadata (gstelement_class, "Input selector",
1269 "Generic", "N-to-1 input stream selector",
1270 "Julien Moutte <julien@moutte.net>, "
1271 "Jan Schmidt <thaytan@mad.scientist.com>, "
1272 "Wim Taymans <wim.taymans@gmail.com>");
1273 gst_element_class_add_pad_template (gstelement_class,
1274 gst_static_pad_template_get (&gst_input_selector_sink_factory));
1275 gst_element_class_add_pad_template (gstelement_class,
1276 gst_static_pad_template_get (&gst_input_selector_src_factory));
1278 gstelement_class->request_new_pad = gst_input_selector_request_new_pad;
1279 gstelement_class->release_pad = gst_input_selector_release_pad;
1280 gstelement_class->change_state = gst_input_selector_change_state;
1284 gst_input_selector_init (GstInputSelector * sel)
1286 sel->srcpad = gst_pad_new ("src", GST_PAD_SRC);
1287 gst_pad_set_iterate_internal_links_function (sel->srcpad,
1288 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1289 gst_pad_set_event_function (sel->srcpad,
1290 GST_DEBUG_FUNCPTR (gst_input_selector_event));
1291 GST_OBJECT_FLAG_SET (sel->srcpad, GST_PAD_FLAG_PROXY_CAPS);
1292 gst_element_add_pad (GST_ELEMENT (sel), sel->srcpad);
1293 /* sinkpad management */
1294 sel->active_sinkpad = NULL;
1296 sel->sync_streams = DEFAULT_SYNC_STREAMS;
1297 sel->sync_mode = DEFAULT_SYNC_MODE;
1298 sel->have_group_id = TRUE;
1300 g_mutex_init (&sel->lock);
1301 g_cond_init (&sel->cond);
1304 /* lets give a change for downstream to do something on
1305 * active-pad change before we start pushing new buffers */
1306 g_signal_connect_data (sel, "notify::active-pad",
1307 (GCallback) gst_input_selector_active_pad_changed, NULL,
1308 NULL, G_CONNECT_AFTER);
1312 gst_input_selector_dispose (GObject * object)
1314 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1316 if (sel->active_sinkpad) {
1317 gst_object_unref (sel->active_sinkpad);
1318 sel->active_sinkpad = NULL;
1320 G_OBJECT_CLASS (parent_class)->dispose (object);
1324 gst_input_selector_finalize (GObject * object)
1326 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1328 g_mutex_clear (&sel->lock);
1329 g_cond_clear (&sel->cond);
1331 G_OBJECT_CLASS (parent_class)->finalize (object);
1334 /* this function must be called with the SELECTOR_LOCK. It returns TRUE when the
1335 * active pad changed. */
1337 gst_input_selector_set_active_pad (GstInputSelector * self, GstPad * pad)
1339 GstSelectorPad *old, *new;
1340 GstPad **active_pad_p;
1342 if (pad == self->active_sinkpad)
1345 old = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
1346 new = GST_SELECTOR_PAD_CAST (pad);
1348 GST_DEBUG_OBJECT (self, "setting active pad to %s:%s",
1349 GST_DEBUG_PAD_NAME (new));
1352 old->pushed = FALSE;
1354 new->pushed = FALSE;
1356 /* Send a new SEGMENT event on the new pad next */
1357 if (old != new && new)
1358 new->events_pending = TRUE;
1360 active_pad_p = &self->active_sinkpad;
1361 gst_object_replace ((GstObject **) active_pad_p, GST_OBJECT_CAST (pad));
1363 if (old && old != new)
1364 gst_pad_push_event (GST_PAD_CAST (old), gst_event_new_reconfigure ());
1366 gst_pad_push_event (GST_PAD_CAST (new), gst_event_new_reconfigure ());
1368 GST_DEBUG_OBJECT (self, "New active pad is %" GST_PTR_FORMAT,
1369 self->active_sinkpad);
1371 if (old != new && new && new->eos) {
1372 new->eos_sent = FALSE;
1373 GST_INPUT_SELECTOR_BROADCAST (self);
1380 gst_input_selector_set_property (GObject * object, guint prop_id,
1381 const GValue * value, GParamSpec * pspec)
1383 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1386 case PROP_ACTIVE_PAD:
1390 pad = g_value_get_object (value);
1392 GST_INPUT_SELECTOR_LOCK (sel);
1394 #if DEBUG_CACHED_BUFFERS
1395 gst_input_selector_debug_cached_buffers (sel);
1398 gst_input_selector_set_active_pad (sel, pad);
1400 #if DEBUG_CACHED_BUFFERS
1401 gst_input_selector_debug_cached_buffers (sel);
1404 GST_INPUT_SELECTOR_UNLOCK (sel);
1407 case PROP_SYNC_STREAMS:
1408 GST_INPUT_SELECTOR_LOCK (sel);
1409 sel->sync_streams = g_value_get_boolean (value);
1410 GST_INPUT_SELECTOR_UNLOCK (sel);
1412 case PROP_SYNC_MODE:
1413 GST_INPUT_SELECTOR_LOCK (sel);
1414 sel->sync_mode = g_value_get_enum (value);
1415 GST_INPUT_SELECTOR_UNLOCK (sel);
1417 case PROP_CACHE_BUFFERS:
1418 GST_INPUT_SELECTOR_LOCK (object);
1419 sel->cache_buffers = g_value_get_boolean (value);
1420 GST_INPUT_SELECTOR_UNLOCK (object);
1423 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1429 gst_input_selector_active_pad_changed (GstInputSelector * sel,
1430 GParamSpec * pspec, gpointer user_data)
1432 /* Wake up all non-active pads in sync mode, they might be
1433 * the active pad now */
1434 if (sel->sync_streams)
1435 GST_INPUT_SELECTOR_BROADCAST (sel);
1439 gst_input_selector_get_property (GObject * object, guint prop_id,
1440 GValue * value, GParamSpec * pspec)
1442 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1446 GST_INPUT_SELECTOR_LOCK (object);
1447 g_value_set_uint (value, sel->n_pads);
1448 GST_INPUT_SELECTOR_UNLOCK (object);
1450 case PROP_ACTIVE_PAD:
1451 GST_INPUT_SELECTOR_LOCK (object);
1452 g_value_set_object (value, sel->active_sinkpad);
1453 GST_INPUT_SELECTOR_UNLOCK (object);
1455 case PROP_SYNC_STREAMS:
1456 GST_INPUT_SELECTOR_LOCK (object);
1457 g_value_set_boolean (value, sel->sync_streams);
1458 GST_INPUT_SELECTOR_UNLOCK (object);
1460 case PROP_SYNC_MODE:
1461 GST_INPUT_SELECTOR_LOCK (object);
1462 g_value_set_enum (value, sel->sync_mode);
1463 GST_INPUT_SELECTOR_UNLOCK (object);
1465 case PROP_CACHE_BUFFERS:
1466 GST_INPUT_SELECTOR_LOCK (object);
1467 g_value_set_boolean (value, sel->cache_buffers);
1468 GST_INPUT_SELECTOR_UNLOCK (object);
1471 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1477 gst_input_selector_get_linked_pad (GstInputSelector * sel, GstPad * pad,
1480 GstPad *otherpad = NULL;
1482 GST_INPUT_SELECTOR_LOCK (sel);
1483 if (pad == sel->srcpad)
1484 otherpad = sel->active_sinkpad;
1485 else if (pad == sel->active_sinkpad || !strict)
1486 otherpad = sel->srcpad;
1488 gst_object_ref (otherpad);
1489 GST_INPUT_SELECTOR_UNLOCK (sel);
1495 gst_input_selector_event (GstPad * pad, GstObject * parent, GstEvent * event)
1497 GstInputSelector *sel;
1498 gboolean result = FALSE;
1500 gboolean done = FALSE;
1501 GValue item = { 0, };
1503 GList *pushed_pads = NULL;
1505 sel = GST_INPUT_SELECTOR (parent);
1506 /* Send upstream events to all sinkpads */
1507 iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1509 /* This is now essentially a copy of gst_pad_event_default_dispatch
1510 * with a different iterator */
1512 switch (gst_iterator_next (iter, &item)) {
1513 case GST_ITERATOR_OK:
1514 eventpad = g_value_get_object (&item);
1516 /* if already pushed, skip */
1517 if (g_list_find (pushed_pads, eventpad)) {
1518 g_value_reset (&item);
1522 gst_event_ref (event);
1523 result |= gst_pad_push_event (eventpad, event);
1525 g_value_reset (&item);
1527 case GST_ITERATOR_RESYNC:
1528 /* We don't reset the result here because we don't push the event
1529 * again on pads that got the event already and because we need
1530 * to consider the result of the previous pushes */
1531 gst_iterator_resync (iter);
1533 case GST_ITERATOR_ERROR:
1534 GST_ERROR_OBJECT (pad, "Could not iterate over sinkpads");
1537 case GST_ITERATOR_DONE:
1542 g_value_unset (&item);
1543 gst_iterator_free (iter);
1545 g_list_free (pushed_pads);
1547 gst_event_unref (event);
1552 /* check if the pad is the active sinkpad */
1553 static inline gboolean
1554 gst_input_selector_is_active_sinkpad (GstInputSelector * sel, GstPad * pad)
1558 GST_INPUT_SELECTOR_LOCK (sel);
1559 res = (pad == sel->active_sinkpad);
1560 GST_INPUT_SELECTOR_UNLOCK (sel);
1565 /* Get or create the active sinkpad, must be called with SELECTOR_LOCK */
1567 gst_input_selector_get_active_sinkpad (GstInputSelector * sel)
1569 GstPad *active_sinkpad;
1571 active_sinkpad = sel->active_sinkpad;
1572 if (active_sinkpad == NULL) {
1573 GValue item = G_VALUE_INIT;
1574 GstIterator *iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1575 GstIteratorResult ires;
1577 while ((ires = gst_iterator_next (iter, &item)) == GST_ITERATOR_RESYNC)
1578 gst_iterator_resync (iter);
1579 if (ires == GST_ITERATOR_OK) {
1580 /* If no pad is currently selected, we return the first usable pad to
1581 * guarantee consistency */
1583 active_sinkpad = sel->active_sinkpad = g_value_dup_object (&item);
1584 g_value_reset (&item);
1585 GST_DEBUG_OBJECT (sel, "Activating pad %s:%s",
1586 GST_DEBUG_PAD_NAME (active_sinkpad));
1588 GST_WARNING_OBJECT (sel, "Couldn't find a default sink pad");
1589 gst_iterator_free (iter);
1592 return active_sinkpad;
1596 gst_input_selector_request_new_pad (GstElement * element,
1597 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps)
1599 GstInputSelector *sel;
1601 GstPad *sinkpad = NULL;
1603 g_return_val_if_fail (templ->direction == GST_PAD_SINK, NULL);
1605 sel = GST_INPUT_SELECTOR (element);
1607 GST_INPUT_SELECTOR_LOCK (sel);
1609 GST_LOG_OBJECT (sel, "Creating new pad sink_%u", sel->padcount);
1610 name = g_strdup_printf ("sink_%u", sel->padcount++);
1611 sinkpad = g_object_new (GST_TYPE_SELECTOR_PAD,
1612 "name", name, "direction", templ->direction, "template", templ, NULL);
1617 gst_pad_set_event_function (sinkpad,
1618 GST_DEBUG_FUNCPTR (gst_selector_pad_event));
1619 gst_pad_set_query_function (sinkpad,
1620 GST_DEBUG_FUNCPTR (gst_selector_pad_query));
1621 gst_pad_set_chain_function (sinkpad,
1622 GST_DEBUG_FUNCPTR (gst_selector_pad_chain));
1623 gst_pad_set_iterate_internal_links_function (sinkpad,
1624 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1626 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_CAPS);
1627 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_ALLOCATION);
1628 gst_pad_set_active (sinkpad, TRUE);
1629 gst_element_add_pad (GST_ELEMENT (sel), sinkpad);
1630 GST_INPUT_SELECTOR_UNLOCK (sel);
1636 gst_input_selector_release_pad (GstElement * element, GstPad * pad)
1638 GstInputSelector *sel;
1640 sel = GST_INPUT_SELECTOR (element);
1641 GST_LOG_OBJECT (sel, "Releasing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1643 GST_INPUT_SELECTOR_LOCK (sel);
1644 /* if the pad was the active pad, makes us select a new one */
1645 if (sel->active_sinkpad == pad) {
1646 GST_DEBUG_OBJECT (sel, "Deactivating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1647 gst_object_unref (sel->active_sinkpad);
1648 sel->active_sinkpad = NULL;
1651 GST_INPUT_SELECTOR_UNLOCK (sel);
1653 gst_pad_set_active (pad, FALSE);
1654 gst_element_remove_pad (GST_ELEMENT (sel), pad);
1658 gst_input_selector_reset (GstInputSelector * sel)
1662 GST_INPUT_SELECTOR_LOCK (sel);
1663 /* clear active pad */
1664 if (sel->active_sinkpad) {
1665 gst_object_unref (sel->active_sinkpad);
1666 sel->active_sinkpad = NULL;
1668 sel->eos_sent = FALSE;
1670 /* reset each of our sinkpads state */
1671 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
1672 GstSelectorPad *selpad = GST_SELECTOR_PAD_CAST (walk->data);
1674 gst_selector_pad_reset (selpad);
1677 gst_tag_list_unref (selpad->tags);
1678 selpad->tags = NULL;
1681 sel->have_group_id = TRUE;
1682 GST_INPUT_SELECTOR_UNLOCK (sel);
1685 static GstStateChangeReturn
1686 gst_input_selector_change_state (GstElement * element,
1687 GstStateChange transition)
1689 GstInputSelector *self = GST_INPUT_SELECTOR (element);
1690 GstStateChangeReturn result;
1692 switch (transition) {
1693 case GST_STATE_CHANGE_READY_TO_PAUSED:
1694 GST_INPUT_SELECTOR_LOCK (self);
1696 self->flushing = FALSE;
1697 GST_INPUT_SELECTOR_UNLOCK (self);
1699 case GST_STATE_CHANGE_PAUSED_TO_READY:
1700 /* first unlock before we call the parent state change function, which
1701 * tries to acquire the stream lock when going to ready. */
1702 GST_INPUT_SELECTOR_LOCK (self);
1704 self->flushing = TRUE;
1705 GST_INPUT_SELECTOR_BROADCAST (self);
1706 GST_INPUT_SELECTOR_UNLOCK (self);
1712 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1714 switch (transition) {
1715 case GST_STATE_CHANGE_PAUSED_TO_READY:
1716 gst_input_selector_reset (self);