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);
379 gst_buffer_unref (buffer);
383 GST_DEBUG_OBJECT (selpad, "Caching buffer %p", buffer);
384 if (!selpad->cached_buffers)
385 selpad->cached_buffers = g_queue_new ();
386 g_queue_push_tail (selpad->cached_buffers,
387 gst_selector_pad_new_cached_buffer (selpad, buffer));
390 /* must be called with the SELECTOR_LOCK */
392 gst_selector_pad_free_cached_buffers (GstSelectorPad * selpad)
394 if (!selpad->cached_buffers)
397 GST_DEBUG_OBJECT (selpad, "Freeing cached buffers");
398 g_queue_free_full (selpad->cached_buffers,
399 (GDestroyNotify) gst_selector_pad_free_cached_buffer);
400 selpad->cached_buffers = NULL;
403 /* strictly get the linked pad from the sinkpad. If the pad is active we return
404 * the srcpad else we return NULL */
406 gst_selector_pad_iterate_linked_pads (GstPad * pad, GstObject * parent)
408 GstInputSelector *sel;
410 GstIterator *it = NULL;
413 sel = GST_INPUT_SELECTOR (parent);
415 otherpad = gst_input_selector_get_linked_pad (sel, pad, TRUE);
417 g_value_init (&val, GST_TYPE_PAD);
418 g_value_set_object (&val, otherpad);
419 it = gst_iterator_new_single (GST_TYPE_PAD, &val);
420 g_value_unset (&val);
421 gst_object_unref (otherpad);
428 forward_sticky_events (GstPad * sinkpad, GstEvent ** event, gpointer user_data)
430 GstInputSelector *sel = GST_INPUT_SELECTOR (user_data);
432 GST_DEBUG_OBJECT (sinkpad, "forward sticky event %" GST_PTR_FORMAT, *event);
434 if (GST_EVENT_TYPE (*event) == GST_EVENT_SEGMENT) {
435 GstSegment *seg = &GST_SELECTOR_PAD (sinkpad)->segment;
438 e = gst_event_new_segment (seg);
439 gst_event_set_seqnum (e, GST_SELECTOR_PAD_CAST (sinkpad)->segment_seqnum);
441 gst_pad_push_event (sel->srcpad, e);
442 } else if (GST_EVENT_TYPE (*event) == GST_EVENT_STREAM_START
443 && !sel->have_group_id) {
445 gst_pad_get_sticky_event (sel->srcpad, GST_EVENT_STREAM_START, 0);
447 /* Only push stream-start once if not all our streams have a stream-id */
449 gst_pad_push_event (sel->srcpad, gst_event_ref (*event));
451 gst_event_unref (tmp);
454 gst_pad_push_event (sel->srcpad, gst_event_ref (*event));
461 gst_input_selector_eos_wait (GstInputSelector * self, GstSelectorPad * pad,
462 GstEvent * eos_event)
464 while (!self->eos && !self->flushing && !pad->flushing) {
465 GstPad *active_sinkpad;
466 active_sinkpad = gst_input_selector_get_active_sinkpad (self);
467 if (pad == GST_SELECTOR_PAD_CAST (active_sinkpad) && pad->eos
469 GST_DEBUG_OBJECT (pad, "send EOS event");
470 GST_INPUT_SELECTOR_UNLOCK (self);
471 /* if we have a pending events, push them now */
472 if (pad->events_pending) {
473 gst_pad_sticky_events_foreach (GST_PAD_CAST (pad),
474 forward_sticky_events, self);
475 pad->events_pending = FALSE;
478 gst_pad_push_event (self->srcpad, gst_event_ref (eos_event));
479 GST_INPUT_SELECTOR_LOCK (self);
480 pad->eos_sent = TRUE;
482 /* we can be unlocked here when we are shutting down (flushing) or when we
484 GST_INPUT_SELECTOR_WAIT (self);
488 return self->flushing;
492 gst_input_selector_all_eos (GstInputSelector * sel)
496 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = walk->next) {
497 GstSelectorPad *selpad;
499 selpad = GST_SELECTOR_PAD_CAST (walk->data);
510 gst_selector_pad_event (GstPad * pad, GstObject * parent, GstEvent * event)
514 gboolean new_tags = FALSE;
515 GstInputSelector *sel;
516 GstSelectorPad *selpad;
517 GstPad *prev_active_sinkpad;
518 GstPad *active_sinkpad;
520 sel = GST_INPUT_SELECTOR (parent);
521 selpad = GST_SELECTOR_PAD_CAST (pad);
522 GST_DEBUG_OBJECT (selpad, "received event %" GST_PTR_FORMAT, event);
524 GST_INPUT_SELECTOR_LOCK (sel);
525 prev_active_sinkpad =
526 sel->active_sinkpad ? gst_object_ref (sel->active_sinkpad) : NULL;
527 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
528 gst_object_ref (active_sinkpad);
529 GST_INPUT_SELECTOR_UNLOCK (sel);
531 if (prev_active_sinkpad != active_sinkpad) {
532 if (prev_active_sinkpad)
533 g_object_notify (G_OBJECT (prev_active_sinkpad), "active");
534 g_object_notify (G_OBJECT (active_sinkpad), "active");
535 g_object_notify (G_OBJECT (sel), "active-pad");
537 if (prev_active_sinkpad)
538 gst_object_unref (prev_active_sinkpad);
539 gst_object_unref (active_sinkpad);
541 GST_INPUT_SELECTOR_LOCK (sel);
542 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
544 /* only forward if we are dealing with the active sinkpad */
545 forward = (pad == active_sinkpad);
547 switch (GST_EVENT_TYPE (event)) {
548 case GST_EVENT_STREAM_START:{
551 if (!gst_event_parse_group_id (event, &group_id))
552 sel->have_group_id = FALSE;
555 case GST_EVENT_FLUSH_START:
556 /* Unblock the pad if it's waiting */
557 selpad->flushing = TRUE;
559 GST_INPUT_SELECTOR_BROADCAST (sel);
561 case GST_EVENT_FLUSH_STOP:
562 gst_selector_pad_reset (selpad);
564 case GST_EVENT_SEGMENT:
566 gst_event_copy_segment (event, &selpad->segment);
567 selpad->segment_seqnum = gst_event_get_seqnum (event);
569 GST_DEBUG_OBJECT (pad, "configured SEGMENT %" GST_SEGMENT_FORMAT,
575 GstTagList *tags, *oldtags, *newtags;
577 gst_event_parse_tag (event, &tags);
579 GST_OBJECT_LOCK (selpad);
580 oldtags = selpad->tags;
582 newtags = gst_tag_list_merge (oldtags, tags, GST_TAG_MERGE_REPLACE);
583 selpad->tags = newtags;
584 GST_OBJECT_UNLOCK (selpad);
587 gst_tag_list_unref (oldtags);
588 GST_DEBUG_OBJECT (pad, "received tags %" GST_PTR_FORMAT, newtags);
595 GST_DEBUG_OBJECT (pad, "received EOS");
596 if (gst_input_selector_all_eos (sel)) {
597 GST_DEBUG_OBJECT (pad, "All sink pad received EOS");
599 GST_INPUT_SELECTOR_BROADCAST (sel);
601 gst_input_selector_eos_wait (sel, selpad, event);
606 GstClockTime ts, dur;
608 GST_DEBUG_OBJECT (pad, "Received gap event: %" GST_PTR_FORMAT, event);
610 gst_event_parse_gap (event, &ts, &dur);
611 if (GST_CLOCK_TIME_IS_VALID (ts)) {
612 if (GST_CLOCK_TIME_IS_VALID (dur))
615 /* update the segment position */
616 GST_OBJECT_LOCK (pad);
617 selpad->segment.position = ts;
618 GST_OBJECT_UNLOCK (pad);
619 if (sel->sync_streams && active_sinkpad == pad)
620 GST_INPUT_SELECTOR_BROADCAST (sel);
628 GST_INPUT_SELECTOR_UNLOCK (sel);
630 g_object_notify (G_OBJECT (selpad), "tags");
632 GST_DEBUG_OBJECT (pad, "forwarding event");
633 res = gst_pad_push_event (sel->srcpad, event);
635 /* If we aren't forwarding the event because the pad is not the
636 * active_sinkpad, then set the flag on the pad
637 * that says a segment needs sending if/when that pad is activated.
638 * For all other cases, we send the event immediately, which makes
639 * sparse streams and other segment updates work correctly downstream.
641 if (GST_EVENT_IS_STICKY (event))
642 selpad->events_pending = TRUE;
643 gst_event_unref (event);
650 gst_selector_pad_query (GstPad * pad, GstObject * parent, GstQuery * query)
652 gboolean res = FALSE;
653 GstInputSelector *self = (GstInputSelector *) parent;
655 switch (GST_QUERY_TYPE (query)) {
657 /* always proxy caps query, regardless of active pad or not */
658 res = gst_pad_peer_query (self->srcpad, query);
660 case GST_QUERY_ALLOCATION:{
661 GstPad *active_sinkpad;
662 GstInputSelector *sel = GST_INPUT_SELECTOR (parent);
664 /* Only do the allocation query for the active sinkpad,
665 * after switching a reconfigure event is sent and upstream
666 * should reconfigure and do a new allocation query
668 if (GST_PAD_DIRECTION (pad) == GST_PAD_SINK) {
669 GST_INPUT_SELECTOR_LOCK (sel);
670 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
671 GST_INPUT_SELECTOR_UNLOCK (sel);
673 if (pad != active_sinkpad) {
681 res = gst_pad_query_default (pad, parent, query);
690 gst_input_selector_get_clipped_running_time (GstSegment * seg, GstBuffer * buf)
692 GstClockTime running_time;
694 running_time = GST_BUFFER_PTS (buf);
695 /* If possible try to get the running time at the end of the buffer */
696 if (GST_BUFFER_DURATION_IS_VALID (buf))
697 running_time += GST_BUFFER_DURATION (buf);
698 /* Only use the segment to convert to running time if the segment is
699 * in TIME format, otherwise do our best to try to sync */
700 if (GST_CLOCK_TIME_IS_VALID (seg->stop)) {
701 if (running_time > seg->stop) {
702 running_time = seg->stop;
705 return gst_segment_to_running_time (seg, GST_FORMAT_TIME, running_time);
708 /* must be called without the SELECTOR_LOCK, will wait until the running time
709 * of the active pad is after this pad or return TRUE when flushing */
711 gst_input_selector_wait_running_time (GstInputSelector * sel,
712 GstSelectorPad * selpad, GstBuffer * buf)
716 GST_DEBUG_OBJECT (selpad, "entering wait for buffer %p", buf);
718 /* If we have no valid timestamp we can't sync this buffer */
719 if (!GST_BUFFER_PTS_IS_VALID (buf)) {
720 GST_DEBUG_OBJECT (selpad, "leaving wait for buffer with "
721 "invalid timestamp");
725 seg = &selpad->segment;
728 * a) this is the active pad
729 * b) the pad or the selector is flushing
730 * c) the buffer running time is before the current running time
731 * (either active-seg or clock, depending on sync-mode)
734 GST_INPUT_SELECTOR_LOCK (sel);
736 GstPad *active_sinkpad;
737 GstSelectorPad *active_selpad;
739 gint64 cur_running_time;
740 GstClockTime running_time;
742 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
743 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
745 if (seg->format != GST_FORMAT_TIME) {
746 GST_DEBUG_OBJECT (selpad,
747 "Not waiting because we don't have a TIME segment");
748 GST_INPUT_SELECTOR_UNLOCK (sel);
752 running_time = gst_input_selector_get_clipped_running_time (seg, buf);
753 /* If this is outside the segment don't sync */
754 if (running_time == -1) {
755 GST_DEBUG_OBJECT (selpad,
756 "Not waiting because buffer is outside segment");
757 GST_INPUT_SELECTOR_UNLOCK (sel);
761 cur_running_time = GST_CLOCK_TIME_NONE;
762 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
763 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
765 GstClockTime base_time;
767 cur_running_time = gst_clock_get_time (clock);
768 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
769 if (base_time <= cur_running_time)
770 cur_running_time -= base_time;
772 cur_running_time = 0;
774 gst_object_unref (clock);
777 GstSegment *active_seg;
779 active_seg = &active_selpad->segment;
781 /* If the active segment is configured but not to time format
782 * we can't do any syncing at all */
783 if ((active_seg->format != GST_FORMAT_TIME
784 && active_seg->format != GST_FORMAT_UNDEFINED)) {
785 GST_DEBUG_OBJECT (selpad,
786 "Not waiting because active segment isn't in TIME format");
787 GST_INPUT_SELECTOR_UNLOCK (sel);
791 /* Get active pad's running time, if no configured segment yet keep at -1 */
792 if (active_seg->format == GST_FORMAT_TIME)
793 cur_running_time = gst_segment_to_running_time (active_seg,
794 GST_FORMAT_TIME, active_seg->position);
797 if (selpad != active_selpad && !sel->eos && !sel->flushing
798 && !selpad->flushing && (cur_running_time == GST_CLOCK_TIME_NONE
799 || running_time >= cur_running_time)) {
800 GST_DEBUG_OBJECT (selpad,
801 "Waiting for active streams to advance. %" GST_TIME_FORMAT " >= %"
802 GST_TIME_FORMAT, GST_TIME_ARGS (running_time),
803 GST_TIME_ARGS (cur_running_time));
804 GST_INPUT_SELECTOR_WAIT (sel);
806 GST_INPUT_SELECTOR_UNLOCK (sel);
811 /* Return TRUE if the selector or the pad is flushing */
812 return (sel->flushing || selpad->flushing);
815 #if DEBUG_CACHED_BUFFERS
817 gst_input_selector_debug_cached_buffers (GstInputSelector * sel)
821 if (gst_debug_category_get_threshold (input_selector_debug) < GST_LEVEL_DEBUG)
824 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = walk->next) {
825 GstSelectorPad *selpad;
829 selpad = GST_SELECTOR_PAD_CAST (walk->data);
830 if (!selpad->cached_buffers) {
831 GST_DEBUG_OBJECT (selpad, "Cached buffers timestamps: <none>");
835 timestamps = g_string_new ("Cached buffers timestamps:");
836 for (l = selpad->cached_buffers->head; l != NULL; l = l->next) {
837 GstSelectorPadCachedBuffer *cached_buffer = l->data;
839 g_string_append_printf (timestamps, " %" GST_TIME_FORMAT,
840 GST_TIME_ARGS (GST_BUFFER_PTS (cached_buffer->buffer)));
842 GST_DEBUG_OBJECT (selpad, "%s", timestamps->str);
843 g_string_free (timestamps, TRUE);
848 /* must be called with the SELECTOR_LOCK */
850 gst_input_selector_cleanup_old_cached_buffers (GstInputSelector * sel,
854 gint64 cur_running_time;
857 cur_running_time = GST_CLOCK_TIME_NONE;
858 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
859 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
861 GstClockTime base_time;
863 cur_running_time = gst_clock_get_time (clock);
864 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
865 if (base_time <= cur_running_time)
866 cur_running_time -= base_time;
868 cur_running_time = 0;
870 gst_object_unref (clock);
873 GstPad *active_sinkpad;
874 GstSelectorPad *active_selpad;
875 GstSegment *active_seg;
877 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
878 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
879 active_seg = &active_selpad->segment;
881 /* Get active pad's running time, if no configured segment yet keep at -1 */
882 if (active_seg->format == GST_FORMAT_TIME)
883 cur_running_time = gst_segment_to_running_time (active_seg,
884 GST_FORMAT_TIME, active_seg->position);
887 if (!GST_CLOCK_TIME_IS_VALID (cur_running_time))
890 GST_DEBUG_OBJECT (sel, "Cleaning up old cached buffers");
891 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
892 GstSelectorPad *selpad;
894 GstSelectorPadCachedBuffer *cached_buffer;
895 GSList *maybe_remove;
896 guint queue_position;
898 selpad = GST_SELECTOR_PAD_CAST (walk->data);
899 if (!selpad->cached_buffers)
902 seg = &selpad->segment;
906 while ((cached_buffer = g_queue_peek_nth (selpad->cached_buffers,
908 GstBuffer *buffer = cached_buffer->buffer;
909 GstClockTime running_time;
912 /* If we have no valid timestamp we can't sync this buffer */
913 if (!GST_BUFFER_PTS_IS_VALID (buffer)) {
914 maybe_remove = g_slist_append (maybe_remove, cached_buffer);
915 queue_position = g_slist_length (maybe_remove);
919 /* the buffer is still valid if its duration is valid and the
920 * timestamp + duration is >= time, or if its duration is invalid
921 * and the timestamp is >= time */
922 running_time = gst_input_selector_get_clipped_running_time (seg, buffer);
923 GST_DEBUG_OBJECT (selpad,
924 "checking if buffer %p running time=%" GST_TIME_FORMAT
925 " >= stream time=%" GST_TIME_FORMAT, buffer,
926 GST_TIME_ARGS (running_time), GST_TIME_ARGS (cur_running_time));
927 if (running_time >= cur_running_time) {
931 GST_DEBUG_OBJECT (selpad, "Removing old cached buffer %p", buffer);
932 g_queue_pop_nth (selpad->cached_buffers, queue_position);
933 gst_selector_pad_free_cached_buffer (cached_buffer);
935 for (l = maybe_remove; l != NULL; l = g_slist_next (l)) {
936 /* A buffer after some invalid buffers was removed, it means the invalid buffers
937 * are old, lets also remove them */
938 cached_buffer = l->data;
939 g_queue_remove (selpad->cached_buffers, cached_buffer);
940 gst_selector_pad_free_cached_buffer (cached_buffer);
943 g_slist_free (maybe_remove);
948 g_slist_free (maybe_remove);
951 if (g_queue_is_empty (selpad->cached_buffers)) {
952 g_queue_free (selpad->cached_buffers);
953 selpad->cached_buffers = NULL;
957 #if DEBUG_CACHED_BUFFERS
958 gst_input_selector_debug_cached_buffers (sel);
963 gst_selector_pad_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
965 GstInputSelector *sel;
967 GstPad *active_sinkpad;
968 GstPad *prev_active_sinkpad = NULL;
969 GstSelectorPad *selpad;
971 sel = GST_INPUT_SELECTOR (parent);
972 selpad = GST_SELECTOR_PAD_CAST (pad);
974 GST_DEBUG_OBJECT (selpad,
975 "entering chain for buf %p with timestamp %" GST_TIME_FORMAT, buf,
976 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
978 GST_INPUT_SELECTOR_LOCK (sel);
981 GST_INPUT_SELECTOR_UNLOCK (sel);
985 GST_LOG_OBJECT (pad, "getting active pad");
987 prev_active_sinkpad =
988 sel->active_sinkpad ? gst_object_ref (sel->active_sinkpad) : NULL;
989 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
991 /* In sync mode wait until the active pad has advanced
992 * after the running time of the current buffer */
993 if (sel->sync_streams) {
994 /* call chain for each cached buffer if we are not the active pad
995 * or if we are the active pad but didn't push anything yet. */
996 if (active_sinkpad != pad || !selpad->pushed) {
997 /* no need to check for sel->cache_buffers as selpad->cached_buffers
998 * will only be valid if cache_buffers is TRUE */
999 if (selpad->cached_buffers && !selpad->sending_cached_buffers) {
1000 GstSelectorPadCachedBuffer *cached_buffer;
1001 GstSegment saved_segment;
1003 saved_segment = selpad->segment;
1005 selpad->sending_cached_buffers = TRUE;
1006 while (!sel->eos && !sel->flushing && !selpad->flushing &&
1007 (cached_buffer = g_queue_pop_head (selpad->cached_buffers))) {
1008 GST_DEBUG_OBJECT (pad, "Cached buffers found, "
1009 "invoking chain for cached buffer %p", cached_buffer->buffer);
1011 selpad->segment = cached_buffer->segment;
1012 selpad->events_pending = TRUE;
1013 GST_INPUT_SELECTOR_UNLOCK (sel);
1014 gst_selector_pad_chain (pad, parent, cached_buffer->buffer);
1015 GST_INPUT_SELECTOR_LOCK (sel);
1017 /* We just passed the ownership of the buffer to the chain function */
1018 cached_buffer->buffer = NULL;
1019 gst_selector_pad_free_cached_buffer (cached_buffer);
1021 /* we may have cleaned up the queue in the meantime because of
1023 if (!selpad->cached_buffers) {
1027 selpad->sending_cached_buffers = FALSE;
1029 /* all cached buffers sent, restore segment for current buffer */
1030 selpad->segment = saved_segment;
1031 selpad->events_pending = TRUE;
1033 /* Might have changed while calling chain for cached buffers */
1034 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1038 if (active_sinkpad != pad) {
1039 GST_INPUT_SELECTOR_UNLOCK (sel);
1040 if (gst_input_selector_wait_running_time (sel, selpad, buf))
1042 GST_INPUT_SELECTOR_LOCK (sel);
1045 /* Might have changed while waiting */
1046 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1049 /* update the segment on the srcpad */
1050 if (GST_BUFFER_PTS_IS_VALID (buf)) {
1051 GstClockTime start_time = GST_BUFFER_PTS (buf);
1053 GST_LOG_OBJECT (pad, "received start time %" GST_TIME_FORMAT,
1054 GST_TIME_ARGS (start_time));
1055 if (GST_BUFFER_DURATION_IS_VALID (buf))
1056 GST_LOG_OBJECT (pad, "received end time %" GST_TIME_FORMAT,
1057 GST_TIME_ARGS (start_time + GST_BUFFER_DURATION (buf)));
1059 GST_OBJECT_LOCK (pad);
1060 selpad->segment.position = start_time;
1061 GST_OBJECT_UNLOCK (pad);
1064 /* Ignore buffers from pads except the selected one */
1065 if (pad != active_sinkpad)
1068 /* Tell all non-active pads that we advanced the running time */
1069 if (sel->sync_streams)
1070 GST_INPUT_SELECTOR_BROADCAST (sel);
1072 GST_INPUT_SELECTOR_UNLOCK (sel);
1074 if (prev_active_sinkpad != active_sinkpad) {
1075 if (prev_active_sinkpad)
1076 g_object_notify (G_OBJECT (prev_active_sinkpad), "active");
1077 g_object_notify (G_OBJECT (active_sinkpad), "active");
1078 g_object_notify (G_OBJECT (sel), "active-pad");
1081 /* if we have a pending events, push them now */
1082 if (G_UNLIKELY (prev_active_sinkpad != active_sinkpad
1083 || selpad->events_pending)) {
1084 gst_pad_sticky_events_foreach (GST_PAD_CAST (selpad), forward_sticky_events,
1086 selpad->events_pending = FALSE;
1089 if (prev_active_sinkpad) {
1090 gst_object_unref (prev_active_sinkpad);
1091 prev_active_sinkpad = NULL;
1094 if (selpad->discont) {
1095 buf = gst_buffer_make_writable (buf);
1097 GST_DEBUG_OBJECT (pad, "Marking discont buffer %p", buf);
1098 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
1099 selpad->discont = FALSE;
1103 GST_LOG_OBJECT (pad, "Forwarding buffer %p with timestamp %" GST_TIME_FORMAT,
1104 buf, GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
1106 /* Only make the buffer read-only when necessary */
1107 if (sel->sync_streams && sel->cache_buffers)
1108 buf = gst_buffer_ref (buf);
1109 res = gst_pad_push (sel->srcpad, buf);
1110 GST_LOG_OBJECT (pad, "Buffer %p forwarded result=%d", buf, res);
1112 GST_INPUT_SELECTOR_LOCK (sel);
1114 if (sel->sync_streams && sel->cache_buffers) {
1115 /* Might have changed while pushing */
1116 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1117 /* only set pad to pushed if we are still the active pad */
1118 if (active_sinkpad == pad)
1119 selpad->pushed = TRUE;
1121 /* cache buffer as we may need it again if we change pads */
1122 gst_selector_pad_cache_buffer (selpad, buf);
1123 gst_input_selector_cleanup_old_cached_buffers (sel, pad);
1125 selpad->pushed = TRUE;
1127 GST_INPUT_SELECTOR_UNLOCK (sel);
1131 if (prev_active_sinkpad)
1132 gst_object_unref (prev_active_sinkpad);
1133 prev_active_sinkpad = NULL;
1137 /* dropped buffers */
1140 gboolean active_pad_pushed = GST_SELECTOR_PAD_CAST (active_sinkpad)->pushed;
1142 GST_DEBUG_OBJECT (pad, "Pad not active, discard buffer %p", buf);
1143 /* when we drop a buffer, we're creating a discont on this pad */
1144 selpad->discont = TRUE;
1145 GST_INPUT_SELECTOR_UNLOCK (sel);
1146 gst_buffer_unref (buf);
1148 /* figure out what to return upstream */
1149 GST_OBJECT_LOCK (selpad);
1150 if (selpad->always_ok || !active_pad_pushed)
1153 res = GST_FLOW_NOT_LINKED;
1154 GST_OBJECT_UNLOCK (selpad);
1160 GST_DEBUG_OBJECT (pad, "We are flushing, discard buffer %p", buf);
1161 gst_buffer_unref (buf);
1162 res = GST_FLOW_FLUSHING;
1167 static void gst_input_selector_dispose (GObject * object);
1168 static void gst_input_selector_finalize (GObject * object);
1170 static void gst_input_selector_set_property (GObject * object,
1171 guint prop_id, const GValue * value, GParamSpec * pspec);
1172 static void gst_input_selector_get_property (GObject * object,
1173 guint prop_id, GValue * value, GParamSpec * pspec);
1175 static GstPad *gst_input_selector_request_new_pad (GstElement * element,
1176 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps);
1177 static void gst_input_selector_release_pad (GstElement * element, GstPad * pad);
1179 static GstStateChangeReturn gst_input_selector_change_state (GstElement *
1180 element, GstStateChange transition);
1182 static gboolean gst_input_selector_event (GstPad * pad, GstObject * parent,
1186 GST_DEBUG_CATEGORY_INIT (input_selector_debug, \
1187 "input-selector", 0, "An input stream selector element");
1188 #define gst_input_selector_parent_class parent_class
1189 G_DEFINE_TYPE_WITH_CODE (GstInputSelector, gst_input_selector, GST_TYPE_ELEMENT,
1193 gst_input_selector_class_init (GstInputSelectorClass * klass)
1195 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
1196 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
1198 gobject_class->dispose = gst_input_selector_dispose;
1199 gobject_class->finalize = gst_input_selector_finalize;
1201 gobject_class->set_property = gst_input_selector_set_property;
1202 gobject_class->get_property = gst_input_selector_get_property;
1204 g_object_class_install_property (gobject_class, PROP_N_PADS,
1205 g_param_spec_uint ("n-pads", "Number of Pads",
1206 "The number of sink pads", 0, G_MAXUINT, 0,
1207 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
1209 g_object_class_install_property (gobject_class, PROP_ACTIVE_PAD,
1210 g_param_spec_object ("active-pad", "Active pad",
1211 "The currently active sink pad", GST_TYPE_PAD,
1212 G_PARAM_READWRITE | GST_PARAM_MUTABLE_PLAYING |
1213 G_PARAM_STATIC_STRINGS));
1216 * GstInputSelector:sync-streams
1218 * If set to %TRUE all inactive streams will be synced to the
1219 * running time of the active stream or to the current clock.
1221 * To make sure no buffers are dropped by input-selector
1222 * that might be needed when switching the active pad,
1223 * sync-mode should be set to "clock" and cache-buffers to TRUE.
1225 g_object_class_install_property (gobject_class, PROP_SYNC_STREAMS,
1226 g_param_spec_boolean ("sync-streams", "Sync Streams",
1227 "Synchronize inactive streams to the running time of the active "
1228 "stream or to the current clock",
1229 DEFAULT_SYNC_STREAMS,
1230 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1231 GST_PARAM_MUTABLE_READY));
1234 * GstInputSelector:sync-mode
1236 * Select how input-selector will sync buffers when in sync-streams mode.
1238 * Note that when using the "active-segment" mode, the "active-segment" may
1239 * be ahead of current clock time when switching the active pad, as the current
1240 * active pad may have pushed more buffers than what was displayed/consumed,
1241 * which may cause delays and some missing buffers.
1243 g_object_class_install_property (gobject_class, PROP_SYNC_MODE,
1244 g_param_spec_enum ("sync-mode", "Sync mode",
1245 "Behavior in sync-streams mode", GST_TYPE_INPUT_SELECTOR_SYNC_MODE,
1247 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1248 GST_PARAM_MUTABLE_READY));
1251 * GstInputSelector:cache-buffers
1253 * If set to %TRUE and GstInputSelector:sync-streams is also set to %TRUE,
1254 * the active pad will cache the buffers still considered valid (after current
1255 * running time, see sync-mode) to avoid missing frames if/when the pad is
1258 * The active pad may push more buffers than what is currently displayed/consumed
1259 * and when changing pads those buffers will be discarded and the only way to
1260 * reactivate that pad without loosing the already consumed buffers is to enable cache.
1262 g_object_class_install_property (gobject_class, PROP_CACHE_BUFFERS,
1263 g_param_spec_boolean ("cache-buffers", "Cache Buffers",
1264 "Cache buffers for active-pad",
1265 DEFAULT_CACHE_BUFFERS,
1266 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1267 GST_PARAM_MUTABLE_READY));
1269 gst_element_class_set_static_metadata (gstelement_class, "Input selector",
1270 "Generic", "N-to-1 input stream selector",
1271 "Julien Moutte <julien@moutte.net>, "
1272 "Jan Schmidt <thaytan@mad.scientist.com>, "
1273 "Wim Taymans <wim.taymans@gmail.com>");
1274 gst_element_class_add_static_pad_template (gstelement_class,
1275 &gst_input_selector_sink_factory);
1276 gst_element_class_add_static_pad_template (gstelement_class,
1277 &gst_input_selector_src_factory);
1279 gstelement_class->request_new_pad = gst_input_selector_request_new_pad;
1280 gstelement_class->release_pad = gst_input_selector_release_pad;
1281 gstelement_class->change_state = gst_input_selector_change_state;
1285 gst_input_selector_init (GstInputSelector * sel)
1287 sel->srcpad = gst_pad_new ("src", GST_PAD_SRC);
1288 gst_pad_set_iterate_internal_links_function (sel->srcpad,
1289 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1290 gst_pad_set_event_function (sel->srcpad,
1291 GST_DEBUG_FUNCPTR (gst_input_selector_event));
1292 GST_OBJECT_FLAG_SET (sel->srcpad, GST_PAD_FLAG_PROXY_CAPS);
1293 gst_element_add_pad (GST_ELEMENT (sel), sel->srcpad);
1294 /* sinkpad management */
1295 sel->active_sinkpad = NULL;
1297 sel->sync_streams = DEFAULT_SYNC_STREAMS;
1298 sel->sync_mode = DEFAULT_SYNC_MODE;
1299 sel->have_group_id = TRUE;
1301 g_mutex_init (&sel->lock);
1302 g_cond_init (&sel->cond);
1305 /* lets give a change for downstream to do something on
1306 * active-pad change before we start pushing new buffers */
1307 g_signal_connect_data (sel, "notify::active-pad",
1308 (GCallback) gst_input_selector_active_pad_changed, NULL,
1309 NULL, G_CONNECT_AFTER);
1313 gst_input_selector_dispose (GObject * object)
1315 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1317 if (sel->active_sinkpad) {
1318 gst_object_unref (sel->active_sinkpad);
1319 sel->active_sinkpad = NULL;
1321 G_OBJECT_CLASS (parent_class)->dispose (object);
1325 gst_input_selector_finalize (GObject * object)
1327 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1329 g_mutex_clear (&sel->lock);
1330 g_cond_clear (&sel->cond);
1332 G_OBJECT_CLASS (parent_class)->finalize (object);
1335 /* this function must be called with the SELECTOR_LOCK. It returns TRUE when the
1336 * active pad changed. */
1338 gst_input_selector_set_active_pad (GstInputSelector * self, GstPad * pad)
1340 GstSelectorPad *old, *new;
1341 GstPad **active_pad_p;
1343 if (pad == self->active_sinkpad)
1346 old = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
1347 new = GST_SELECTOR_PAD_CAST (pad);
1349 GST_DEBUG_OBJECT (self, "setting active pad to %s:%s",
1350 GST_DEBUG_PAD_NAME (new));
1353 old->pushed = FALSE;
1355 new->pushed = FALSE;
1357 /* Send a new SEGMENT event on the new pad next */
1358 if (old != new && new)
1359 new->events_pending = TRUE;
1361 active_pad_p = &self->active_sinkpad;
1362 gst_object_replace ((GstObject **) active_pad_p, GST_OBJECT_CAST (pad));
1364 if (old && old != new)
1365 gst_pad_push_event (GST_PAD_CAST (old), gst_event_new_reconfigure ());
1367 gst_pad_push_event (GST_PAD_CAST (new), gst_event_new_reconfigure ());
1369 GST_DEBUG_OBJECT (self, "New active pad is %" GST_PTR_FORMAT,
1370 self->active_sinkpad);
1372 if (old != new && new && new->eos) {
1373 new->eos_sent = FALSE;
1374 GST_INPUT_SELECTOR_BROADCAST (self);
1381 gst_input_selector_set_property (GObject * object, guint prop_id,
1382 const GValue * value, GParamSpec * pspec)
1384 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1387 case PROP_ACTIVE_PAD:
1391 pad = g_value_get_object (value);
1393 GST_INPUT_SELECTOR_LOCK (sel);
1395 #if DEBUG_CACHED_BUFFERS
1396 gst_input_selector_debug_cached_buffers (sel);
1399 gst_input_selector_set_active_pad (sel, pad);
1401 #if DEBUG_CACHED_BUFFERS
1402 gst_input_selector_debug_cached_buffers (sel);
1405 GST_INPUT_SELECTOR_UNLOCK (sel);
1408 case PROP_SYNC_STREAMS:
1409 GST_INPUT_SELECTOR_LOCK (sel);
1410 sel->sync_streams = g_value_get_boolean (value);
1411 GST_INPUT_SELECTOR_UNLOCK (sel);
1413 case PROP_SYNC_MODE:
1414 GST_INPUT_SELECTOR_LOCK (sel);
1415 sel->sync_mode = g_value_get_enum (value);
1416 GST_INPUT_SELECTOR_UNLOCK (sel);
1418 case PROP_CACHE_BUFFERS:
1419 GST_INPUT_SELECTOR_LOCK (object);
1420 sel->cache_buffers = g_value_get_boolean (value);
1421 GST_INPUT_SELECTOR_UNLOCK (object);
1424 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1430 gst_input_selector_active_pad_changed (GstInputSelector * sel,
1431 GParamSpec * pspec, gpointer user_data)
1433 /* Wake up all non-active pads in sync mode, they might be
1434 * the active pad now */
1435 if (sel->sync_streams)
1436 GST_INPUT_SELECTOR_BROADCAST (sel);
1440 gst_input_selector_get_property (GObject * object, guint prop_id,
1441 GValue * value, GParamSpec * pspec)
1443 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1447 GST_INPUT_SELECTOR_LOCK (object);
1448 g_value_set_uint (value, sel->n_pads);
1449 GST_INPUT_SELECTOR_UNLOCK (object);
1451 case PROP_ACTIVE_PAD:
1452 GST_INPUT_SELECTOR_LOCK (object);
1453 g_value_set_object (value, sel->active_sinkpad);
1454 GST_INPUT_SELECTOR_UNLOCK (object);
1456 case PROP_SYNC_STREAMS:
1457 GST_INPUT_SELECTOR_LOCK (object);
1458 g_value_set_boolean (value, sel->sync_streams);
1459 GST_INPUT_SELECTOR_UNLOCK (object);
1461 case PROP_SYNC_MODE:
1462 GST_INPUT_SELECTOR_LOCK (object);
1463 g_value_set_enum (value, sel->sync_mode);
1464 GST_INPUT_SELECTOR_UNLOCK (object);
1466 case PROP_CACHE_BUFFERS:
1467 GST_INPUT_SELECTOR_LOCK (object);
1468 g_value_set_boolean (value, sel->cache_buffers);
1469 GST_INPUT_SELECTOR_UNLOCK (object);
1472 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1478 gst_input_selector_get_linked_pad (GstInputSelector * sel, GstPad * pad,
1481 GstPad *otherpad = NULL;
1483 GST_INPUT_SELECTOR_LOCK (sel);
1484 if (pad == sel->srcpad)
1485 otherpad = sel->active_sinkpad;
1486 else if (pad == sel->active_sinkpad || !strict)
1487 otherpad = sel->srcpad;
1489 gst_object_ref (otherpad);
1490 GST_INPUT_SELECTOR_UNLOCK (sel);
1496 gst_input_selector_event (GstPad * pad, GstObject * parent, GstEvent * event)
1498 GstInputSelector *sel;
1499 gboolean result = FALSE;
1501 gboolean done = FALSE;
1502 GValue item = { 0, };
1504 GList *pushed_pads = NULL;
1506 sel = GST_INPUT_SELECTOR (parent);
1507 /* Send upstream events to all sinkpads */
1508 iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1510 /* This is now essentially a copy of gst_pad_event_default_dispatch
1511 * with a different iterator */
1513 switch (gst_iterator_next (iter, &item)) {
1514 case GST_ITERATOR_OK:
1515 eventpad = g_value_get_object (&item);
1517 /* if already pushed, skip */
1518 if (g_list_find (pushed_pads, eventpad)) {
1519 g_value_reset (&item);
1523 gst_event_ref (event);
1524 result |= gst_pad_push_event (eventpad, event);
1526 g_value_reset (&item);
1528 case GST_ITERATOR_RESYNC:
1529 /* We don't reset the result here because we don't push the event
1530 * again on pads that got the event already and because we need
1531 * to consider the result of the previous pushes */
1532 gst_iterator_resync (iter);
1534 case GST_ITERATOR_ERROR:
1535 GST_ERROR_OBJECT (pad, "Could not iterate over sinkpads");
1538 case GST_ITERATOR_DONE:
1543 g_value_unset (&item);
1544 gst_iterator_free (iter);
1546 g_list_free (pushed_pads);
1548 gst_event_unref (event);
1553 /* check if the pad is the active sinkpad */
1554 static inline gboolean
1555 gst_input_selector_is_active_sinkpad (GstInputSelector * sel, GstPad * pad)
1559 GST_INPUT_SELECTOR_LOCK (sel);
1560 res = (pad == sel->active_sinkpad);
1561 GST_INPUT_SELECTOR_UNLOCK (sel);
1566 /* Get or create the active sinkpad, must be called with SELECTOR_LOCK */
1568 gst_input_selector_get_active_sinkpad (GstInputSelector * sel)
1570 GstPad *active_sinkpad;
1572 active_sinkpad = sel->active_sinkpad;
1573 if (active_sinkpad == NULL) {
1574 GValue item = G_VALUE_INIT;
1575 GstIterator *iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1576 GstIteratorResult ires;
1578 while ((ires = gst_iterator_next (iter, &item)) == GST_ITERATOR_RESYNC)
1579 gst_iterator_resync (iter);
1580 if (ires == GST_ITERATOR_OK) {
1581 /* If no pad is currently selected, we return the first usable pad to
1582 * guarantee consistency */
1584 active_sinkpad = sel->active_sinkpad = g_value_dup_object (&item);
1585 g_value_reset (&item);
1586 GST_DEBUG_OBJECT (sel, "Activating pad %s:%s",
1587 GST_DEBUG_PAD_NAME (active_sinkpad));
1589 GST_WARNING_OBJECT (sel, "Couldn't find a default sink pad");
1590 gst_iterator_free (iter);
1593 return active_sinkpad;
1597 gst_input_selector_request_new_pad (GstElement * element,
1598 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps)
1600 GstInputSelector *sel;
1602 GstPad *sinkpad = NULL;
1604 g_return_val_if_fail (templ->direction == GST_PAD_SINK, NULL);
1606 sel = GST_INPUT_SELECTOR (element);
1608 GST_INPUT_SELECTOR_LOCK (sel);
1610 GST_LOG_OBJECT (sel, "Creating new pad sink_%u", sel->padcount);
1611 name = g_strdup_printf ("sink_%u", sel->padcount++);
1612 sinkpad = g_object_new (GST_TYPE_SELECTOR_PAD,
1613 "name", name, "direction", templ->direction, "template", templ, NULL);
1618 gst_pad_set_event_function (sinkpad,
1619 GST_DEBUG_FUNCPTR (gst_selector_pad_event));
1620 gst_pad_set_query_function (sinkpad,
1621 GST_DEBUG_FUNCPTR (gst_selector_pad_query));
1622 gst_pad_set_chain_function (sinkpad,
1623 GST_DEBUG_FUNCPTR (gst_selector_pad_chain));
1624 gst_pad_set_iterate_internal_links_function (sinkpad,
1625 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1627 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_CAPS);
1628 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_ALLOCATION);
1629 gst_pad_set_active (sinkpad, TRUE);
1630 gst_element_add_pad (GST_ELEMENT (sel), sinkpad);
1631 GST_INPUT_SELECTOR_UNLOCK (sel);
1637 gst_input_selector_release_pad (GstElement * element, GstPad * pad)
1639 GstInputSelector *sel;
1641 sel = GST_INPUT_SELECTOR (element);
1642 GST_LOG_OBJECT (sel, "Releasing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1644 GST_INPUT_SELECTOR_LOCK (sel);
1645 /* if the pad was the active pad, makes us select a new one */
1646 if (sel->active_sinkpad == pad) {
1647 GST_DEBUG_OBJECT (sel, "Deactivating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1648 gst_object_unref (sel->active_sinkpad);
1649 sel->active_sinkpad = NULL;
1652 GST_INPUT_SELECTOR_UNLOCK (sel);
1654 gst_pad_set_active (pad, FALSE);
1655 gst_element_remove_pad (GST_ELEMENT (sel), pad);
1659 gst_input_selector_reset (GstInputSelector * sel)
1663 GST_INPUT_SELECTOR_LOCK (sel);
1664 /* clear active pad */
1665 if (sel->active_sinkpad) {
1666 gst_object_unref (sel->active_sinkpad);
1667 sel->active_sinkpad = NULL;
1669 sel->eos_sent = FALSE;
1671 /* reset each of our sinkpads state */
1672 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
1673 GstSelectorPad *selpad = GST_SELECTOR_PAD_CAST (walk->data);
1675 gst_selector_pad_reset (selpad);
1678 gst_tag_list_unref (selpad->tags);
1679 selpad->tags = NULL;
1682 sel->have_group_id = TRUE;
1683 GST_INPUT_SELECTOR_UNLOCK (sel);
1686 static GstStateChangeReturn
1687 gst_input_selector_change_state (GstElement * element,
1688 GstStateChange transition)
1690 GstInputSelector *self = GST_INPUT_SELECTOR (element);
1691 GstStateChangeReturn result;
1693 switch (transition) {
1694 case GST_STATE_CHANGE_READY_TO_PAUSED:
1695 GST_INPUT_SELECTOR_LOCK (self);
1697 self->flushing = FALSE;
1698 GST_INPUT_SELECTOR_UNLOCK (self);
1700 case GST_STATE_CHANGE_PAUSED_TO_READY:
1701 /* first unlock before we call the parent state change function, which
1702 * tries to acquire the stream lock when going to ready. */
1703 GST_INPUT_SELECTOR_LOCK (self);
1705 self->flushing = TRUE;
1706 GST_INPUT_SELECTOR_BROADCAST (self);
1707 GST_INPUT_SELECTOR_UNLOCK (self);
1713 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1715 switch (transition) {
1716 case GST_STATE_CHANGE_PAUSED_TO_READY:
1717 gst_input_selector_reset (self);