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 /* Wake up other pads so they can continue when syncing to
481 * running time, as this pad just switched to EOS and
482 * may enable others to progress */
483 GST_INPUT_SELECTOR_BROADCAST (self);
484 pad->eos_sent = TRUE;
486 /* we can be unlocked here when we are shutting down (flushing) or when we
488 GST_INPUT_SELECTOR_WAIT (self);
492 return self->flushing;
496 gst_input_selector_all_eos (GstInputSelector * sel)
500 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = walk->next) {
501 GstSelectorPad *selpad;
503 selpad = GST_SELECTOR_PAD_CAST (walk->data);
514 gst_selector_pad_event (GstPad * pad, GstObject * parent, GstEvent * event)
518 gboolean new_tags = FALSE;
519 GstInputSelector *sel;
520 GstSelectorPad *selpad;
521 GstPad *prev_active_sinkpad;
522 GstPad *active_sinkpad;
524 sel = GST_INPUT_SELECTOR (parent);
525 selpad = GST_SELECTOR_PAD_CAST (pad);
526 GST_DEBUG_OBJECT (selpad, "received event %" GST_PTR_FORMAT, event);
528 GST_INPUT_SELECTOR_LOCK (sel);
529 prev_active_sinkpad =
530 sel->active_sinkpad ? gst_object_ref (sel->active_sinkpad) : NULL;
531 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
532 gst_object_ref (active_sinkpad);
533 GST_INPUT_SELECTOR_UNLOCK (sel);
535 if (prev_active_sinkpad != active_sinkpad) {
536 if (prev_active_sinkpad)
537 g_object_notify (G_OBJECT (prev_active_sinkpad), "active");
538 g_object_notify (G_OBJECT (active_sinkpad), "active");
539 g_object_notify (G_OBJECT (sel), "active-pad");
541 if (prev_active_sinkpad)
542 gst_object_unref (prev_active_sinkpad);
543 gst_object_unref (active_sinkpad);
545 GST_INPUT_SELECTOR_LOCK (sel);
546 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
548 /* only forward if we are dealing with the active sinkpad */
549 forward = (pad == active_sinkpad);
551 switch (GST_EVENT_TYPE (event)) {
552 case GST_EVENT_STREAM_START:{
555 if (!gst_event_parse_group_id (event, &group_id))
556 sel->have_group_id = FALSE;
559 case GST_EVENT_FLUSH_START:
560 /* Unblock the pad if it's waiting */
561 selpad->flushing = TRUE;
563 GST_INPUT_SELECTOR_BROADCAST (sel);
565 case GST_EVENT_FLUSH_STOP:
566 gst_selector_pad_reset (selpad);
568 case GST_EVENT_SEGMENT:
570 gst_event_copy_segment (event, &selpad->segment);
571 selpad->segment_seqnum = gst_event_get_seqnum (event);
573 GST_DEBUG_OBJECT (pad, "configured SEGMENT %" GST_SEGMENT_FORMAT,
579 GstTagList *tags, *oldtags, *newtags;
581 gst_event_parse_tag (event, &tags);
583 GST_OBJECT_LOCK (selpad);
584 oldtags = selpad->tags;
586 newtags = gst_tag_list_merge (oldtags, tags, GST_TAG_MERGE_REPLACE);
587 selpad->tags = newtags;
588 GST_OBJECT_UNLOCK (selpad);
591 gst_tag_list_unref (oldtags);
592 GST_DEBUG_OBJECT (pad, "received tags %" GST_PTR_FORMAT, newtags);
599 GST_DEBUG_OBJECT (pad, "received EOS");
600 if (gst_input_selector_all_eos (sel)) {
601 GST_DEBUG_OBJECT (pad, "All sink pad received EOS");
603 GST_INPUT_SELECTOR_BROADCAST (sel);
605 gst_input_selector_eos_wait (sel, selpad, event);
610 GstClockTime ts, dur;
612 GST_DEBUG_OBJECT (pad, "Received gap event: %" GST_PTR_FORMAT, event);
614 gst_event_parse_gap (event, &ts, &dur);
615 if (GST_CLOCK_TIME_IS_VALID (ts)) {
616 if (GST_CLOCK_TIME_IS_VALID (dur))
619 /* update the segment position */
620 GST_OBJECT_LOCK (pad);
621 selpad->segment.position = ts;
622 GST_OBJECT_UNLOCK (pad);
623 if (sel->sync_streams && active_sinkpad == pad)
624 GST_INPUT_SELECTOR_BROADCAST (sel);
632 GST_INPUT_SELECTOR_UNLOCK (sel);
634 g_object_notify (G_OBJECT (selpad), "tags");
636 GST_DEBUG_OBJECT (pad, "forwarding event");
637 res = gst_pad_push_event (sel->srcpad, event);
639 /* If we aren't forwarding the event because the pad is not the
640 * active_sinkpad, then set the flag on the pad
641 * that says a segment needs sending if/when that pad is activated.
642 * For all other cases, we send the event immediately, which makes
643 * sparse streams and other segment updates work correctly downstream.
645 if (GST_EVENT_IS_STICKY (event))
646 selpad->events_pending = TRUE;
647 gst_event_unref (event);
654 gst_selector_pad_query (GstPad * pad, GstObject * parent, GstQuery * query)
656 gboolean res = FALSE;
657 GstInputSelector *self = (GstInputSelector *) parent;
659 switch (GST_QUERY_TYPE (query)) {
661 /* always proxy caps query, regardless of active pad or not */
662 res = gst_pad_peer_query (self->srcpad, query);
664 case GST_QUERY_ALLOCATION:{
665 GstPad *active_sinkpad;
666 GstInputSelector *sel = GST_INPUT_SELECTOR (parent);
668 /* Only do the allocation query for the active sinkpad,
669 * after switching a reconfigure event is sent and upstream
670 * should reconfigure and do a new allocation query
672 if (GST_PAD_DIRECTION (pad) == GST_PAD_SINK) {
673 GST_INPUT_SELECTOR_LOCK (sel);
674 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
675 GST_INPUT_SELECTOR_UNLOCK (sel);
677 if (pad != active_sinkpad) {
685 res = gst_pad_query_default (pad, parent, query);
694 gst_input_selector_get_clipped_running_time (GstSegment * seg, GstBuffer * buf)
696 GstClockTime running_time;
698 running_time = GST_BUFFER_PTS (buf);
699 /* If possible try to get the running time at the end of the buffer */
700 if (GST_BUFFER_DURATION_IS_VALID (buf))
701 running_time += GST_BUFFER_DURATION (buf);
702 /* Only use the segment to convert to running time if the segment is
703 * in TIME format, otherwise do our best to try to sync */
704 if (GST_CLOCK_TIME_IS_VALID (seg->stop)) {
705 if (running_time > seg->stop) {
706 running_time = seg->stop;
709 return gst_segment_to_running_time (seg, GST_FORMAT_TIME, running_time);
712 /* must be called without the SELECTOR_LOCK, will wait until the running time
713 * of the active pad is after this pad or return TRUE when flushing */
715 gst_input_selector_wait_running_time (GstInputSelector * sel,
716 GstSelectorPad * selpad, GstBuffer * buf)
720 GST_DEBUG_OBJECT (selpad, "entering wait for buffer %p", buf);
722 /* If we have no valid timestamp we can't sync this buffer */
723 if (!GST_BUFFER_PTS_IS_VALID (buf)) {
724 GST_DEBUG_OBJECT (selpad, "leaving wait for buffer with "
725 "invalid timestamp");
729 seg = &selpad->segment;
732 * a) this is the active pad
733 * b) the pad or the selector is flushing
734 * c) the buffer running time is before the current running time
735 * (either active-seg or clock, depending on sync-mode)
738 GST_INPUT_SELECTOR_LOCK (sel);
740 GstPad *active_sinkpad;
741 GstSelectorPad *active_selpad;
743 gint64 cur_running_time;
744 GstClockTime running_time;
746 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
747 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
749 if (seg->format != GST_FORMAT_TIME) {
750 GST_DEBUG_OBJECT (selpad,
751 "Not waiting because we don't have a TIME segment");
752 GST_INPUT_SELECTOR_UNLOCK (sel);
756 running_time = gst_input_selector_get_clipped_running_time (seg, buf);
757 /* If this is outside the segment don't sync */
758 if (running_time == -1) {
759 GST_DEBUG_OBJECT (selpad,
760 "Not waiting because buffer is outside segment");
761 GST_INPUT_SELECTOR_UNLOCK (sel);
765 cur_running_time = GST_CLOCK_TIME_NONE;
766 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
767 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
769 GstClockTime base_time;
771 cur_running_time = gst_clock_get_time (clock);
772 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
773 if (base_time <= cur_running_time)
774 cur_running_time -= base_time;
776 cur_running_time = 0;
778 gst_object_unref (clock);
781 GstSegment *active_seg;
783 active_seg = &active_selpad->segment;
785 /* If the active segment is configured but not to time format
786 * we can't do any syncing at all */
787 if ((active_seg->format != GST_FORMAT_TIME
788 && active_seg->format != GST_FORMAT_UNDEFINED)) {
789 GST_DEBUG_OBJECT (selpad,
790 "Not waiting because active segment isn't in TIME format");
791 GST_INPUT_SELECTOR_UNLOCK (sel);
795 /* Get active pad's running time, if no configured segment yet keep at -1 */
796 if (active_seg->format == GST_FORMAT_TIME)
797 cur_running_time = gst_segment_to_running_time (active_seg,
798 GST_FORMAT_TIME, active_seg->position);
801 if (selpad != active_selpad && !sel->eos && !sel->flushing
802 && !selpad->flushing && (cur_running_time == GST_CLOCK_TIME_NONE
803 || running_time >= cur_running_time)) {
804 GST_DEBUG_OBJECT (selpad,
805 "Waiting for active streams to advance. %" GST_TIME_FORMAT " >= %"
806 GST_TIME_FORMAT, GST_TIME_ARGS (running_time),
807 GST_TIME_ARGS (cur_running_time));
808 GST_INPUT_SELECTOR_WAIT (sel);
810 GST_INPUT_SELECTOR_UNLOCK (sel);
815 /* Return TRUE if the selector or the pad is flushing */
816 return (sel->flushing || selpad->flushing);
819 #if DEBUG_CACHED_BUFFERS
821 gst_input_selector_debug_cached_buffers (GstInputSelector * sel)
825 if (gst_debug_category_get_threshold (input_selector_debug) < GST_LEVEL_DEBUG)
828 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = walk->next) {
829 GstSelectorPad *selpad;
833 selpad = GST_SELECTOR_PAD_CAST (walk->data);
834 if (!selpad->cached_buffers) {
835 GST_DEBUG_OBJECT (selpad, "Cached buffers timestamps: <none>");
839 timestamps = g_string_new ("Cached buffers timestamps:");
840 for (l = selpad->cached_buffers->head; l != NULL; l = l->next) {
841 GstSelectorPadCachedBuffer *cached_buffer = l->data;
843 g_string_append_printf (timestamps, " %" GST_TIME_FORMAT,
844 GST_TIME_ARGS (GST_BUFFER_PTS (cached_buffer->buffer)));
846 GST_DEBUG_OBJECT (selpad, "%s", timestamps->str);
847 g_string_free (timestamps, TRUE);
852 /* must be called with the SELECTOR_LOCK */
854 gst_input_selector_cleanup_old_cached_buffers (GstInputSelector * sel,
858 gint64 cur_running_time;
861 cur_running_time = GST_CLOCK_TIME_NONE;
862 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
863 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
865 GstClockTime base_time;
867 cur_running_time = gst_clock_get_time (clock);
868 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
869 if (base_time <= cur_running_time)
870 cur_running_time -= base_time;
872 cur_running_time = 0;
874 gst_object_unref (clock);
877 GstPad *active_sinkpad;
878 GstSelectorPad *active_selpad;
879 GstSegment *active_seg;
881 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
882 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
883 active_seg = &active_selpad->segment;
885 /* Get active pad's running time, if no configured segment yet keep at -1 */
886 if (active_seg->format == GST_FORMAT_TIME)
887 cur_running_time = gst_segment_to_running_time (active_seg,
888 GST_FORMAT_TIME, active_seg->position);
891 if (!GST_CLOCK_TIME_IS_VALID (cur_running_time))
894 GST_DEBUG_OBJECT (sel, "Cleaning up old cached buffers");
895 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
896 GstSelectorPad *selpad;
898 GstSelectorPadCachedBuffer *cached_buffer;
899 GSList *maybe_remove;
900 guint queue_position;
902 selpad = GST_SELECTOR_PAD_CAST (walk->data);
903 if (!selpad->cached_buffers)
906 seg = &selpad->segment;
910 while ((cached_buffer = g_queue_peek_nth (selpad->cached_buffers,
912 GstBuffer *buffer = cached_buffer->buffer;
913 GstClockTime running_time;
916 /* If we have no valid timestamp we can't sync this buffer */
917 if (!GST_BUFFER_PTS_IS_VALID (buffer)) {
918 maybe_remove = g_slist_append (maybe_remove, cached_buffer);
919 queue_position = g_slist_length (maybe_remove);
923 /* the buffer is still valid if its duration is valid and the
924 * timestamp + duration is >= time, or if its duration is invalid
925 * and the timestamp is >= time */
926 running_time = gst_input_selector_get_clipped_running_time (seg, buffer);
927 GST_DEBUG_OBJECT (selpad,
928 "checking if buffer %p running time=%" GST_TIME_FORMAT
929 " >= stream time=%" GST_TIME_FORMAT, buffer,
930 GST_TIME_ARGS (running_time), GST_TIME_ARGS (cur_running_time));
931 if (running_time >= cur_running_time) {
935 GST_DEBUG_OBJECT (selpad, "Removing old cached buffer %p", buffer);
936 g_queue_pop_nth (selpad->cached_buffers, queue_position);
937 gst_selector_pad_free_cached_buffer (cached_buffer);
939 for (l = maybe_remove; l != NULL; l = g_slist_next (l)) {
940 /* A buffer after some invalid buffers was removed, it means the invalid buffers
941 * are old, lets also remove them */
942 cached_buffer = l->data;
943 g_queue_remove (selpad->cached_buffers, cached_buffer);
944 gst_selector_pad_free_cached_buffer (cached_buffer);
947 g_slist_free (maybe_remove);
952 g_slist_free (maybe_remove);
955 if (g_queue_is_empty (selpad->cached_buffers)) {
956 g_queue_free (selpad->cached_buffers);
957 selpad->cached_buffers = NULL;
961 #if DEBUG_CACHED_BUFFERS
962 gst_input_selector_debug_cached_buffers (sel);
967 gst_selector_pad_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
969 GstInputSelector *sel;
971 GstPad *active_sinkpad;
972 GstPad *prev_active_sinkpad = NULL;
973 GstSelectorPad *selpad;
975 sel = GST_INPUT_SELECTOR (parent);
976 selpad = GST_SELECTOR_PAD_CAST (pad);
978 GST_DEBUG_OBJECT (selpad,
979 "entering chain for buf %p with timestamp %" GST_TIME_FORMAT, buf,
980 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
982 GST_INPUT_SELECTOR_LOCK (sel);
985 GST_INPUT_SELECTOR_UNLOCK (sel);
989 GST_LOG_OBJECT (pad, "getting active pad");
991 prev_active_sinkpad =
992 sel->active_sinkpad ? gst_object_ref (sel->active_sinkpad) : NULL;
993 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
995 /* In sync mode wait until the active pad has advanced
996 * after the running time of the current buffer */
997 if (sel->sync_streams) {
998 /* call chain for each cached buffer if we are not the active pad
999 * or if we are the active pad but didn't push anything yet. */
1000 if (active_sinkpad != pad || !selpad->pushed) {
1001 /* no need to check for sel->cache_buffers as selpad->cached_buffers
1002 * will only be valid if cache_buffers is TRUE */
1003 if (selpad->cached_buffers && !selpad->sending_cached_buffers) {
1004 GstSelectorPadCachedBuffer *cached_buffer;
1005 GstSegment saved_segment;
1007 saved_segment = selpad->segment;
1009 selpad->sending_cached_buffers = TRUE;
1010 while (!sel->eos && !sel->flushing && !selpad->flushing &&
1011 (cached_buffer = g_queue_pop_head (selpad->cached_buffers))) {
1012 GST_DEBUG_OBJECT (pad, "Cached buffers found, "
1013 "invoking chain for cached buffer %p", cached_buffer->buffer);
1015 selpad->segment = cached_buffer->segment;
1016 selpad->events_pending = TRUE;
1017 GST_INPUT_SELECTOR_UNLOCK (sel);
1018 gst_selector_pad_chain (pad, parent, cached_buffer->buffer);
1019 GST_INPUT_SELECTOR_LOCK (sel);
1021 /* We just passed the ownership of the buffer to the chain function */
1022 cached_buffer->buffer = NULL;
1023 gst_selector_pad_free_cached_buffer (cached_buffer);
1025 /* we may have cleaned up the queue in the meantime because of
1027 if (!selpad->cached_buffers) {
1031 selpad->sending_cached_buffers = FALSE;
1033 /* all cached buffers sent, restore segment for current buffer */
1034 selpad->segment = saved_segment;
1035 selpad->events_pending = TRUE;
1037 /* Might have changed while calling chain for cached buffers */
1038 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1042 if (active_sinkpad != pad) {
1043 GST_INPUT_SELECTOR_UNLOCK (sel);
1044 if (gst_input_selector_wait_running_time (sel, selpad, buf))
1046 GST_INPUT_SELECTOR_LOCK (sel);
1049 /* Might have changed while waiting */
1050 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1053 /* update the segment on the srcpad */
1054 if (GST_BUFFER_PTS_IS_VALID (buf)) {
1055 GstClockTime start_time = GST_BUFFER_PTS (buf);
1057 GST_LOG_OBJECT (pad, "received start time %" GST_TIME_FORMAT,
1058 GST_TIME_ARGS (start_time));
1059 if (GST_BUFFER_DURATION_IS_VALID (buf))
1060 GST_LOG_OBJECT (pad, "received end time %" GST_TIME_FORMAT,
1061 GST_TIME_ARGS (start_time + GST_BUFFER_DURATION (buf)));
1063 GST_OBJECT_LOCK (pad);
1064 selpad->segment.position = start_time;
1065 GST_OBJECT_UNLOCK (pad);
1068 /* Ignore buffers from pads except the selected one */
1069 if (pad != active_sinkpad)
1072 /* Tell all non-active pads that we advanced the running time */
1073 if (sel->sync_streams)
1074 GST_INPUT_SELECTOR_BROADCAST (sel);
1076 GST_INPUT_SELECTOR_UNLOCK (sel);
1078 if (prev_active_sinkpad != active_sinkpad) {
1079 if (prev_active_sinkpad)
1080 g_object_notify (G_OBJECT (prev_active_sinkpad), "active");
1081 g_object_notify (G_OBJECT (active_sinkpad), "active");
1082 g_object_notify (G_OBJECT (sel), "active-pad");
1085 /* if we have a pending events, push them now */
1086 if (G_UNLIKELY (prev_active_sinkpad != active_sinkpad
1087 || selpad->events_pending)) {
1088 gst_pad_sticky_events_foreach (GST_PAD_CAST (selpad), forward_sticky_events,
1090 selpad->events_pending = FALSE;
1093 if (prev_active_sinkpad) {
1094 gst_object_unref (prev_active_sinkpad);
1095 prev_active_sinkpad = NULL;
1098 if (selpad->discont) {
1099 buf = gst_buffer_make_writable (buf);
1101 GST_DEBUG_OBJECT (pad, "Marking discont buffer %p", buf);
1102 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
1103 selpad->discont = FALSE;
1107 GST_LOG_OBJECT (pad, "Forwarding buffer %p with timestamp %" GST_TIME_FORMAT,
1108 buf, GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
1110 /* Only make the buffer read-only when necessary */
1111 if (sel->sync_streams && sel->cache_buffers)
1112 buf = gst_buffer_ref (buf);
1113 res = gst_pad_push (sel->srcpad, buf);
1114 GST_LOG_OBJECT (pad, "Buffer %p forwarded result=%d", buf, res);
1116 GST_INPUT_SELECTOR_LOCK (sel);
1118 if (sel->sync_streams && sel->cache_buffers) {
1119 /* Might have changed while pushing */
1120 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1121 /* only set pad to pushed if we are still the active pad */
1122 if (active_sinkpad == pad)
1123 selpad->pushed = TRUE;
1125 /* cache buffer as we may need it again if we change pads */
1126 gst_selector_pad_cache_buffer (selpad, buf);
1127 gst_input_selector_cleanup_old_cached_buffers (sel, pad);
1129 selpad->pushed = TRUE;
1131 GST_INPUT_SELECTOR_UNLOCK (sel);
1135 if (prev_active_sinkpad)
1136 gst_object_unref (prev_active_sinkpad);
1137 prev_active_sinkpad = NULL;
1141 /* dropped buffers */
1144 gboolean active_pad_pushed = GST_SELECTOR_PAD_CAST (active_sinkpad)->pushed;
1146 GST_DEBUG_OBJECT (pad, "Pad not active, discard buffer %p", buf);
1147 /* when we drop a buffer, we're creating a discont on this pad */
1148 selpad->discont = TRUE;
1149 GST_INPUT_SELECTOR_UNLOCK (sel);
1150 gst_buffer_unref (buf);
1152 /* figure out what to return upstream */
1153 GST_OBJECT_LOCK (selpad);
1154 if (selpad->always_ok || !active_pad_pushed)
1157 res = GST_FLOW_NOT_LINKED;
1158 GST_OBJECT_UNLOCK (selpad);
1164 GST_DEBUG_OBJECT (pad, "We are flushing, discard buffer %p", buf);
1165 gst_buffer_unref (buf);
1166 res = GST_FLOW_FLUSHING;
1171 static void gst_input_selector_dispose (GObject * object);
1172 static void gst_input_selector_finalize (GObject * object);
1174 static void gst_input_selector_set_property (GObject * object,
1175 guint prop_id, const GValue * value, GParamSpec * pspec);
1176 static void gst_input_selector_get_property (GObject * object,
1177 guint prop_id, GValue * value, GParamSpec * pspec);
1179 static GstPad *gst_input_selector_request_new_pad (GstElement * element,
1180 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps);
1181 static void gst_input_selector_release_pad (GstElement * element, GstPad * pad);
1183 static GstStateChangeReturn gst_input_selector_change_state (GstElement *
1184 element, GstStateChange transition);
1186 static gboolean gst_input_selector_event (GstPad * pad, GstObject * parent,
1190 GST_DEBUG_CATEGORY_INIT (input_selector_debug, \
1191 "input-selector", 0, "An input stream selector element");
1192 #define gst_input_selector_parent_class parent_class
1193 G_DEFINE_TYPE_WITH_CODE (GstInputSelector, gst_input_selector, GST_TYPE_ELEMENT,
1197 gst_input_selector_class_init (GstInputSelectorClass * klass)
1199 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
1200 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
1202 gobject_class->dispose = gst_input_selector_dispose;
1203 gobject_class->finalize = gst_input_selector_finalize;
1205 gobject_class->set_property = gst_input_selector_set_property;
1206 gobject_class->get_property = gst_input_selector_get_property;
1208 g_object_class_install_property (gobject_class, PROP_N_PADS,
1209 g_param_spec_uint ("n-pads", "Number of Pads",
1210 "The number of sink pads", 0, G_MAXUINT, 0,
1211 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
1213 g_object_class_install_property (gobject_class, PROP_ACTIVE_PAD,
1214 g_param_spec_object ("active-pad", "Active pad",
1215 "The currently active sink pad", GST_TYPE_PAD,
1216 G_PARAM_READWRITE | GST_PARAM_MUTABLE_PLAYING |
1217 G_PARAM_STATIC_STRINGS));
1220 * GstInputSelector:sync-streams
1222 * If set to %TRUE all inactive streams will be synced to the
1223 * running time of the active stream or to the current clock.
1225 * To make sure no buffers are dropped by input-selector
1226 * that might be needed when switching the active pad,
1227 * sync-mode should be set to "clock" and cache-buffers to TRUE.
1229 g_object_class_install_property (gobject_class, PROP_SYNC_STREAMS,
1230 g_param_spec_boolean ("sync-streams", "Sync Streams",
1231 "Synchronize inactive streams to the running time of the active "
1232 "stream or to the current clock",
1233 DEFAULT_SYNC_STREAMS,
1234 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1235 GST_PARAM_MUTABLE_READY));
1238 * GstInputSelector:sync-mode
1240 * Select how input-selector will sync buffers when in sync-streams mode.
1242 * Note that when using the "active-segment" mode, the "active-segment" may
1243 * be ahead of current clock time when switching the active pad, as the current
1244 * active pad may have pushed more buffers than what was displayed/consumed,
1245 * which may cause delays and some missing buffers.
1247 g_object_class_install_property (gobject_class, PROP_SYNC_MODE,
1248 g_param_spec_enum ("sync-mode", "Sync mode",
1249 "Behavior in sync-streams mode", GST_TYPE_INPUT_SELECTOR_SYNC_MODE,
1251 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1252 GST_PARAM_MUTABLE_READY));
1255 * GstInputSelector:cache-buffers
1257 * If set to %TRUE and GstInputSelector:sync-streams is also set to %TRUE,
1258 * the active pad will cache the buffers still considered valid (after current
1259 * running time, see sync-mode) to avoid missing frames if/when the pad is
1262 * The active pad may push more buffers than what is currently displayed/consumed
1263 * and when changing pads those buffers will be discarded and the only way to
1264 * reactivate that pad without loosing the already consumed buffers is to enable cache.
1266 g_object_class_install_property (gobject_class, PROP_CACHE_BUFFERS,
1267 g_param_spec_boolean ("cache-buffers", "Cache Buffers",
1268 "Cache buffers for active-pad",
1269 DEFAULT_CACHE_BUFFERS,
1270 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1271 GST_PARAM_MUTABLE_READY));
1273 gst_element_class_set_static_metadata (gstelement_class, "Input selector",
1274 "Generic", "N-to-1 input stream selector",
1275 "Julien Moutte <julien@moutte.net>, "
1276 "Jan Schmidt <thaytan@mad.scientist.com>, "
1277 "Wim Taymans <wim.taymans@gmail.com>");
1278 gst_element_class_add_static_pad_template (gstelement_class,
1279 &gst_input_selector_sink_factory);
1280 gst_element_class_add_static_pad_template (gstelement_class,
1281 &gst_input_selector_src_factory);
1283 gstelement_class->request_new_pad = gst_input_selector_request_new_pad;
1284 gstelement_class->release_pad = gst_input_selector_release_pad;
1285 gstelement_class->change_state = gst_input_selector_change_state;
1289 gst_input_selector_init (GstInputSelector * sel)
1291 sel->srcpad = gst_pad_new ("src", GST_PAD_SRC);
1292 gst_pad_set_iterate_internal_links_function (sel->srcpad,
1293 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1294 gst_pad_set_event_function (sel->srcpad,
1295 GST_DEBUG_FUNCPTR (gst_input_selector_event));
1296 GST_OBJECT_FLAG_SET (sel->srcpad, GST_PAD_FLAG_PROXY_CAPS);
1297 gst_element_add_pad (GST_ELEMENT (sel), sel->srcpad);
1298 /* sinkpad management */
1299 sel->active_sinkpad = NULL;
1301 sel->sync_streams = DEFAULT_SYNC_STREAMS;
1302 sel->sync_mode = DEFAULT_SYNC_MODE;
1303 sel->have_group_id = TRUE;
1305 g_mutex_init (&sel->lock);
1306 g_cond_init (&sel->cond);
1309 /* lets give a change for downstream to do something on
1310 * active-pad change before we start pushing new buffers */
1311 g_signal_connect_data (sel, "notify::active-pad",
1312 (GCallback) gst_input_selector_active_pad_changed, NULL,
1313 NULL, G_CONNECT_AFTER);
1317 gst_input_selector_dispose (GObject * object)
1319 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1321 if (sel->active_sinkpad) {
1322 gst_object_unref (sel->active_sinkpad);
1323 sel->active_sinkpad = NULL;
1325 G_OBJECT_CLASS (parent_class)->dispose (object);
1329 gst_input_selector_finalize (GObject * object)
1331 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1333 g_mutex_clear (&sel->lock);
1334 g_cond_clear (&sel->cond);
1336 G_OBJECT_CLASS (parent_class)->finalize (object);
1339 /* this function must be called with the SELECTOR_LOCK. It returns TRUE when the
1340 * active pad changed. */
1342 gst_input_selector_set_active_pad (GstInputSelector * self, GstPad * pad)
1344 GstSelectorPad *old, *new;
1345 GstPad **active_pad_p;
1347 if (pad == self->active_sinkpad)
1350 old = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
1351 new = GST_SELECTOR_PAD_CAST (pad);
1353 GST_DEBUG_OBJECT (self, "setting active pad to %s:%s",
1354 GST_DEBUG_PAD_NAME (new));
1357 old->pushed = FALSE;
1359 new->pushed = FALSE;
1361 /* Send a new SEGMENT event on the new pad next */
1362 if (old != new && new)
1363 new->events_pending = TRUE;
1365 active_pad_p = &self->active_sinkpad;
1366 gst_object_replace ((GstObject **) active_pad_p, GST_OBJECT_CAST (pad));
1368 if (old && old != new)
1369 gst_pad_push_event (GST_PAD_CAST (old), gst_event_new_reconfigure ());
1371 gst_pad_push_event (GST_PAD_CAST (new), gst_event_new_reconfigure ());
1373 GST_DEBUG_OBJECT (self, "New active pad is %" GST_PTR_FORMAT,
1374 self->active_sinkpad);
1376 if (old != new && new && new->eos) {
1377 new->eos_sent = FALSE;
1378 GST_INPUT_SELECTOR_BROADCAST (self);
1385 gst_input_selector_set_property (GObject * object, guint prop_id,
1386 const GValue * value, GParamSpec * pspec)
1388 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1391 case PROP_ACTIVE_PAD:
1395 pad = g_value_get_object (value);
1397 GST_INPUT_SELECTOR_LOCK (sel);
1399 #if DEBUG_CACHED_BUFFERS
1400 gst_input_selector_debug_cached_buffers (sel);
1403 gst_input_selector_set_active_pad (sel, pad);
1405 #if DEBUG_CACHED_BUFFERS
1406 gst_input_selector_debug_cached_buffers (sel);
1409 GST_INPUT_SELECTOR_UNLOCK (sel);
1412 case PROP_SYNC_STREAMS:
1413 GST_INPUT_SELECTOR_LOCK (sel);
1414 sel->sync_streams = g_value_get_boolean (value);
1415 GST_INPUT_SELECTOR_UNLOCK (sel);
1417 case PROP_SYNC_MODE:
1418 GST_INPUT_SELECTOR_LOCK (sel);
1419 sel->sync_mode = g_value_get_enum (value);
1420 GST_INPUT_SELECTOR_UNLOCK (sel);
1422 case PROP_CACHE_BUFFERS:
1423 GST_INPUT_SELECTOR_LOCK (object);
1424 sel->cache_buffers = g_value_get_boolean (value);
1425 GST_INPUT_SELECTOR_UNLOCK (object);
1428 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1434 gst_input_selector_active_pad_changed (GstInputSelector * sel,
1435 GParamSpec * pspec, gpointer user_data)
1437 /* Wake up all non-active pads in sync mode, they might be
1438 * the active pad now */
1439 if (sel->sync_streams)
1440 GST_INPUT_SELECTOR_BROADCAST (sel);
1444 gst_input_selector_get_property (GObject * object, guint prop_id,
1445 GValue * value, GParamSpec * pspec)
1447 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1451 GST_INPUT_SELECTOR_LOCK (object);
1452 g_value_set_uint (value, sel->n_pads);
1453 GST_INPUT_SELECTOR_UNLOCK (object);
1455 case PROP_ACTIVE_PAD:
1456 GST_INPUT_SELECTOR_LOCK (object);
1457 g_value_set_object (value, sel->active_sinkpad);
1458 GST_INPUT_SELECTOR_UNLOCK (object);
1460 case PROP_SYNC_STREAMS:
1461 GST_INPUT_SELECTOR_LOCK (object);
1462 g_value_set_boolean (value, sel->sync_streams);
1463 GST_INPUT_SELECTOR_UNLOCK (object);
1465 case PROP_SYNC_MODE:
1466 GST_INPUT_SELECTOR_LOCK (object);
1467 g_value_set_enum (value, sel->sync_mode);
1468 GST_INPUT_SELECTOR_UNLOCK (object);
1470 case PROP_CACHE_BUFFERS:
1471 GST_INPUT_SELECTOR_LOCK (object);
1472 g_value_set_boolean (value, sel->cache_buffers);
1473 GST_INPUT_SELECTOR_UNLOCK (object);
1476 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1482 gst_input_selector_get_linked_pad (GstInputSelector * sel, GstPad * pad,
1485 GstPad *otherpad = NULL;
1487 GST_INPUT_SELECTOR_LOCK (sel);
1488 if (pad == sel->srcpad)
1489 otherpad = sel->active_sinkpad;
1490 else if (pad == sel->active_sinkpad || !strict)
1491 otherpad = sel->srcpad;
1493 gst_object_ref (otherpad);
1494 GST_INPUT_SELECTOR_UNLOCK (sel);
1500 gst_input_selector_event (GstPad * pad, GstObject * parent, GstEvent * event)
1502 GstInputSelector *sel;
1503 gboolean result = FALSE;
1505 gboolean done = FALSE;
1506 GValue item = { 0, };
1508 GList *pushed_pads = NULL;
1510 sel = GST_INPUT_SELECTOR (parent);
1511 /* Send upstream events to all sinkpads */
1512 iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1514 /* This is now essentially a copy of gst_pad_event_default_dispatch
1515 * with a different iterator */
1517 switch (gst_iterator_next (iter, &item)) {
1518 case GST_ITERATOR_OK:
1519 eventpad = g_value_get_object (&item);
1521 /* if already pushed, skip */
1522 if (g_list_find (pushed_pads, eventpad)) {
1523 g_value_reset (&item);
1527 gst_event_ref (event);
1528 result |= gst_pad_push_event (eventpad, event);
1530 g_value_reset (&item);
1532 case GST_ITERATOR_RESYNC:
1533 /* We don't reset the result here because we don't push the event
1534 * again on pads that got the event already and because we need
1535 * to consider the result of the previous pushes */
1536 gst_iterator_resync (iter);
1538 case GST_ITERATOR_ERROR:
1539 GST_ERROR_OBJECT (pad, "Could not iterate over sinkpads");
1542 case GST_ITERATOR_DONE:
1547 g_value_unset (&item);
1548 gst_iterator_free (iter);
1550 g_list_free (pushed_pads);
1552 gst_event_unref (event);
1557 /* check if the pad is the active sinkpad */
1558 static inline gboolean
1559 gst_input_selector_is_active_sinkpad (GstInputSelector * sel, GstPad * pad)
1563 GST_INPUT_SELECTOR_LOCK (sel);
1564 res = (pad == sel->active_sinkpad);
1565 GST_INPUT_SELECTOR_UNLOCK (sel);
1570 /* Get or create the active sinkpad, must be called with SELECTOR_LOCK */
1572 gst_input_selector_get_active_sinkpad (GstInputSelector * sel)
1574 GstPad *active_sinkpad;
1576 active_sinkpad = sel->active_sinkpad;
1577 if (active_sinkpad == NULL) {
1578 GValue item = G_VALUE_INIT;
1579 GstIterator *iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1580 GstIteratorResult ires;
1582 while ((ires = gst_iterator_next (iter, &item)) == GST_ITERATOR_RESYNC)
1583 gst_iterator_resync (iter);
1584 if (ires == GST_ITERATOR_OK) {
1585 /* If no pad is currently selected, we return the first usable pad to
1586 * guarantee consistency */
1588 active_sinkpad = sel->active_sinkpad = g_value_dup_object (&item);
1589 g_value_reset (&item);
1590 GST_DEBUG_OBJECT (sel, "Activating pad %s:%s",
1591 GST_DEBUG_PAD_NAME (active_sinkpad));
1593 GST_WARNING_OBJECT (sel, "Couldn't find a default sink pad");
1594 gst_iterator_free (iter);
1597 return active_sinkpad;
1601 gst_input_selector_request_new_pad (GstElement * element,
1602 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps)
1604 GstInputSelector *sel;
1606 GstPad *sinkpad = NULL;
1608 g_return_val_if_fail (templ->direction == GST_PAD_SINK, NULL);
1610 sel = GST_INPUT_SELECTOR (element);
1612 GST_INPUT_SELECTOR_LOCK (sel);
1614 GST_LOG_OBJECT (sel, "Creating new pad sink_%u", sel->padcount);
1615 name = g_strdup_printf ("sink_%u", sel->padcount++);
1616 sinkpad = g_object_new (GST_TYPE_SELECTOR_PAD,
1617 "name", name, "direction", templ->direction, "template", templ, NULL);
1622 gst_pad_set_event_function (sinkpad,
1623 GST_DEBUG_FUNCPTR (gst_selector_pad_event));
1624 gst_pad_set_query_function (sinkpad,
1625 GST_DEBUG_FUNCPTR (gst_selector_pad_query));
1626 gst_pad_set_chain_function (sinkpad,
1627 GST_DEBUG_FUNCPTR (gst_selector_pad_chain));
1628 gst_pad_set_iterate_internal_links_function (sinkpad,
1629 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1631 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_CAPS);
1632 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_ALLOCATION);
1633 gst_pad_set_active (sinkpad, TRUE);
1634 gst_element_add_pad (GST_ELEMENT (sel), sinkpad);
1635 GST_INPUT_SELECTOR_UNLOCK (sel);
1641 gst_input_selector_release_pad (GstElement * element, GstPad * pad)
1643 GstInputSelector *sel;
1645 sel = GST_INPUT_SELECTOR (element);
1646 GST_LOG_OBJECT (sel, "Releasing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1648 GST_INPUT_SELECTOR_LOCK (sel);
1649 /* if the pad was the active pad, makes us select a new one */
1650 if (sel->active_sinkpad == pad) {
1651 GST_DEBUG_OBJECT (sel, "Deactivating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1652 gst_object_unref (sel->active_sinkpad);
1653 sel->active_sinkpad = NULL;
1656 GST_INPUT_SELECTOR_UNLOCK (sel);
1658 gst_pad_set_active (pad, FALSE);
1659 gst_element_remove_pad (GST_ELEMENT (sel), pad);
1663 gst_input_selector_reset (GstInputSelector * sel)
1667 GST_INPUT_SELECTOR_LOCK (sel);
1668 /* clear active pad */
1669 if (sel->active_sinkpad) {
1670 gst_object_unref (sel->active_sinkpad);
1671 sel->active_sinkpad = NULL;
1673 sel->eos_sent = FALSE;
1675 /* reset each of our sinkpads state */
1676 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
1677 GstSelectorPad *selpad = GST_SELECTOR_PAD_CAST (walk->data);
1679 gst_selector_pad_reset (selpad);
1682 gst_tag_list_unref (selpad->tags);
1683 selpad->tags = NULL;
1686 sel->have_group_id = TRUE;
1687 GST_INPUT_SELECTOR_UNLOCK (sel);
1690 static GstStateChangeReturn
1691 gst_input_selector_change_state (GstElement * element,
1692 GstStateChange transition)
1694 GstInputSelector *self = GST_INPUT_SELECTOR (element);
1695 GstStateChangeReturn result;
1697 switch (transition) {
1698 case GST_STATE_CHANGE_READY_TO_PAUSED:
1699 GST_INPUT_SELECTOR_LOCK (self);
1701 self->flushing = FALSE;
1702 GST_INPUT_SELECTOR_UNLOCK (self);
1704 case GST_STATE_CHANGE_PAUSED_TO_READY:
1705 /* first unlock before we call the parent state change function, which
1706 * tries to acquire the stream lock when going to ready. */
1707 GST_INPUT_SELECTOR_LOCK (self);
1709 self->flushing = TRUE;
1710 GST_INPUT_SELECTOR_BROADCAST (self);
1711 GST_INPUT_SELECTOR_UNLOCK (self);
1717 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1719 switch (transition) {
1720 case GST_STATE_CHANGE_PAUSED_TO_READY:
1721 gst_input_selector_reset (self);