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,
135 static guint gst_input_selector_signals[LAST_SIGNAL] = { 0 };
137 static void gst_input_selector_active_pad_changed (GstInputSelector * sel,
138 GParamSpec * pspec, gpointer user_data);
139 static inline gboolean gst_input_selector_is_active_sinkpad (GstInputSelector *
141 static GstPad *gst_input_selector_activate_sinkpad (GstInputSelector * sel,
143 static GstPad *gst_input_selector_get_linked_pad (GstInputSelector * sel,
144 GstPad * pad, gboolean strict);
146 #define GST_TYPE_SELECTOR_PAD \
147 (gst_selector_pad_get_type())
148 #define GST_SELECTOR_PAD(obj) \
149 (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_SELECTOR_PAD, GstSelectorPad))
150 #define GST_SELECTOR_PAD_CLASS(klass) \
151 (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_SELECTOR_PAD, GstSelectorPadClass))
152 #define GST_IS_SELECTOR_PAD(obj) \
153 (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_SELECTOR_PAD))
154 #define GST_IS_SELECTOR_PAD_CLASS(klass) \
155 (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_SELECTOR_PAD))
156 #define GST_SELECTOR_PAD_CAST(obj) \
157 ((GstSelectorPad *)(obj))
159 typedef struct _GstSelectorPad GstSelectorPad;
160 typedef struct _GstSelectorPadClass GstSelectorPadClass;
161 typedef struct _GstSelectorPadCachedBuffer GstSelectorPadCachedBuffer;
163 struct _GstSelectorPad
167 gboolean active; /* when buffer have passed the pad */
168 gboolean pushed; /* when buffer was pushed downstream since activation */
169 gboolean eos; /* when EOS has been received */
170 gboolean eos_sent; /* when EOS was sent downstream */
171 gboolean discont; /* after switching we create a discont */
172 gboolean flushing; /* set after flush-start and before flush-stop */
174 GstTagList *tags; /* last tags received on the pad */
176 GstSegment segment; /* the current segment on the pad */
177 guint32 segment_seqnum; /* sequence number of the current segment */
179 gboolean events_pending; /* TRUE if sticky events need to be updated */
181 gboolean sending_cached_buffers;
182 GQueue *cached_buffers;
185 struct _GstSelectorPadCachedBuffer
191 struct _GstSelectorPadClass
196 GType gst_selector_pad_get_type (void);
197 static void gst_selector_pad_finalize (GObject * object);
198 static void gst_selector_pad_get_property (GObject * object,
199 guint prop_id, GValue * value, GParamSpec * pspec);
200 static void gst_selector_pad_set_property (GObject * object,
201 guint prop_id, const GValue * value, GParamSpec * pspec);
203 static gint64 gst_selector_pad_get_running_time (GstSelectorPad * pad);
204 static void gst_selector_pad_reset (GstSelectorPad * pad);
205 static gboolean gst_selector_pad_event (GstPad * pad, GstObject * parent,
207 static gboolean gst_selector_pad_query (GstPad * pad, GstObject * parent,
209 static GstIterator *gst_selector_pad_iterate_linked_pads (GstPad * pad,
211 static GstFlowReturn gst_selector_pad_chain (GstPad * pad, GstObject * parent,
213 static void gst_selector_pad_cache_buffer (GstSelectorPad * selpad,
215 static void gst_selector_pad_free_cached_buffers (GstSelectorPad * selpad);
217 G_DEFINE_TYPE (GstSelectorPad, gst_selector_pad, GST_TYPE_PAD);
220 gst_selector_pad_class_init (GstSelectorPadClass * klass)
222 GObjectClass *gobject_class;
224 gobject_class = (GObjectClass *) klass;
226 gobject_class->finalize = gst_selector_pad_finalize;
228 gobject_class->get_property = gst_selector_pad_get_property;
229 gobject_class->set_property = gst_selector_pad_set_property;
231 g_object_class_install_property (gobject_class, PROP_PAD_RUNNING_TIME,
232 g_param_spec_int64 ("running-time", "Running time",
233 "Running time of stream on pad", 0, G_MAXINT64, 0,
234 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
235 g_object_class_install_property (gobject_class, PROP_PAD_TAGS,
236 g_param_spec_boxed ("tags", "Tags",
237 "The currently active tags on the pad", GST_TYPE_TAG_LIST,
238 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
239 g_object_class_install_property (gobject_class, PROP_PAD_ACTIVE,
240 g_param_spec_boolean ("active", "Active",
241 "If the pad is currently active", FALSE,
242 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
243 /* FIXME: better property name? */
244 g_object_class_install_property (gobject_class, PROP_PAD_ALWAYS_OK,
245 g_param_spec_boolean ("always-ok", "Always OK",
246 "Make an inactive pad return OK instead of NOT_LINKED",
247 DEFAULT_PAD_ALWAYS_OK, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
251 gst_selector_pad_init (GstSelectorPad * pad)
253 pad->always_ok = DEFAULT_PAD_ALWAYS_OK;
254 gst_selector_pad_reset (pad);
258 gst_selector_pad_finalize (GObject * object)
262 pad = GST_SELECTOR_PAD_CAST (object);
265 gst_tag_list_unref (pad->tags);
266 gst_selector_pad_free_cached_buffers (pad);
268 G_OBJECT_CLASS (gst_selector_pad_parent_class)->finalize (object);
272 gst_selector_pad_set_property (GObject * object, guint prop_id,
273 const GValue * value, GParamSpec * pspec)
275 GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
278 case PROP_PAD_ALWAYS_OK:
279 GST_OBJECT_LOCK (object);
280 spad->always_ok = g_value_get_boolean (value);
281 GST_OBJECT_UNLOCK (object);
284 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
290 gst_selector_pad_get_property (GObject * object, guint prop_id,
291 GValue * value, GParamSpec * pspec)
293 GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
296 case PROP_PAD_RUNNING_TIME:
297 g_value_set_int64 (value, gst_selector_pad_get_running_time (spad));
300 GST_OBJECT_LOCK (object);
301 g_value_set_boxed (value, spad->tags);
302 GST_OBJECT_UNLOCK (object);
304 case PROP_PAD_ACTIVE:
306 GstInputSelector *sel;
308 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (spad));
310 g_value_set_boolean (value, gst_input_selector_is_active_sinkpad (sel,
311 GST_PAD_CAST (spad)));
312 gst_object_unref (sel);
314 g_value_set_boolean (value, FALSE);
318 case PROP_PAD_ALWAYS_OK:
319 GST_OBJECT_LOCK (object);
320 g_value_set_boolean (value, spad->always_ok);
321 GST_OBJECT_UNLOCK (object);
324 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
330 gst_selector_pad_get_running_time (GstSelectorPad * pad)
334 GST_OBJECT_LOCK (pad);
336 GstFormat format = pad->segment.format;
339 gst_segment_to_running_time (&pad->segment, format,
340 pad->segment.position);
342 GST_OBJECT_UNLOCK (pad);
344 GST_DEBUG_OBJECT (pad, "running time: %" GST_TIME_FORMAT
345 " segment: %" GST_SEGMENT_FORMAT, GST_TIME_ARGS (ret), &pad->segment);
350 /* must be called with the SELECTOR_LOCK */
352 gst_selector_pad_reset (GstSelectorPad * pad)
354 GST_OBJECT_LOCK (pad);
358 pad->eos_sent = FALSE;
359 pad->events_pending = FALSE;
360 pad->discont = FALSE;
361 pad->flushing = FALSE;
362 gst_segment_init (&pad->segment, GST_FORMAT_UNDEFINED);
363 pad->sending_cached_buffers = FALSE;
364 gst_selector_pad_free_cached_buffers (pad);
365 GST_OBJECT_UNLOCK (pad);
368 static GstSelectorPadCachedBuffer *
369 gst_selector_pad_new_cached_buffer (GstSelectorPad * selpad, GstBuffer * buffer)
371 GstSelectorPadCachedBuffer *cached_buffer =
372 g_slice_new (GstSelectorPadCachedBuffer);
373 cached_buffer->buffer = buffer;
374 cached_buffer->segment = selpad->segment;
375 return cached_buffer;
379 gst_selector_pad_free_cached_buffer (GstSelectorPadCachedBuffer * cached_buffer)
381 gst_buffer_unref (cached_buffer->buffer);
382 g_slice_free (GstSelectorPadCachedBuffer, cached_buffer);
385 /* must be called with the SELECTOR_LOCK */
387 gst_selector_pad_cache_buffer (GstSelectorPad * selpad, GstBuffer * buffer)
389 if (selpad->segment.format != GST_FORMAT_TIME) {
390 GST_DEBUG_OBJECT (selpad, "Buffer %p with segment not in time format, "
391 "not caching", buffer);
395 GST_DEBUG_OBJECT (selpad, "Caching buffer %p", buffer);
396 if (!selpad->cached_buffers)
397 selpad->cached_buffers = g_queue_new ();
398 g_queue_push_tail (selpad->cached_buffers,
399 gst_selector_pad_new_cached_buffer (selpad, buffer));
402 /* must be called with the SELECTOR_LOCK */
404 gst_selector_pad_free_cached_buffers (GstSelectorPad * selpad)
406 GstSelectorPadCachedBuffer *cached_buffer;
408 if (!selpad->cached_buffers)
411 GST_DEBUG_OBJECT (selpad, "Freeing cached buffers");
412 while ((cached_buffer = g_queue_pop_head (selpad->cached_buffers)))
413 gst_selector_pad_free_cached_buffer (cached_buffer);
414 g_queue_free (selpad->cached_buffers);
415 selpad->cached_buffers = NULL;
418 /* strictly get the linked pad from the sinkpad. If the pad is active we return
419 * the srcpad else we return NULL */
421 gst_selector_pad_iterate_linked_pads (GstPad * pad, GstObject * parent)
423 GstInputSelector *sel;
425 GstIterator *it = NULL;
428 sel = GST_INPUT_SELECTOR (parent);
430 otherpad = gst_input_selector_get_linked_pad (sel, pad, TRUE);
432 g_value_init (&val, GST_TYPE_PAD);
433 g_value_set_object (&val, otherpad);
434 it = gst_iterator_new_single (GST_TYPE_PAD, &val);
435 g_value_unset (&val);
436 gst_object_unref (otherpad);
443 gst_selector_pad_event (GstPad * pad, GstObject * parent, GstEvent * event)
447 gboolean new_tags = FALSE;
448 GstInputSelector *sel;
449 GstSelectorPad *selpad;
450 GstPad *prev_active_sinkpad;
451 GstPad *active_sinkpad;
453 sel = GST_INPUT_SELECTOR (parent);
454 selpad = GST_SELECTOR_PAD_CAST (pad);
455 GST_DEBUG_OBJECT (selpad, "received event %" GST_PTR_FORMAT, event);
457 GST_INPUT_SELECTOR_LOCK (sel);
458 prev_active_sinkpad =
459 sel->active_sinkpad ? gst_object_ref (sel->active_sinkpad) : NULL;
460 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
461 GST_INPUT_SELECTOR_UNLOCK (sel);
463 if (prev_active_sinkpad != active_sinkpad) {
464 if (prev_active_sinkpad)
465 g_object_notify (G_OBJECT (prev_active_sinkpad), "active");
466 g_object_notify (G_OBJECT (active_sinkpad), "active");
467 g_object_notify (G_OBJECT (sel), "active-pad");
469 if (prev_active_sinkpad)
470 gst_object_unref (prev_active_sinkpad);
472 GST_INPUT_SELECTOR_LOCK (sel);
473 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
475 /* only forward if we are dealing with the active sinkpad */
476 forward = (pad == active_sinkpad);
478 switch (GST_EVENT_TYPE (event)) {
479 case GST_EVENT_STREAM_START:{
482 if (!gst_event_parse_group_id (event, &group_id))
483 sel->have_group_id = FALSE;
486 case GST_EVENT_FLUSH_START:
487 /* Unblock the pad if it's waiting */
488 selpad->flushing = TRUE;
489 GST_INPUT_SELECTOR_BROADCAST (sel);
491 case GST_EVENT_FLUSH_STOP:
492 gst_selector_pad_reset (selpad);
494 case GST_EVENT_SEGMENT:
496 gst_event_copy_segment (event, &selpad->segment);
497 selpad->segment_seqnum = gst_event_get_seqnum (event);
499 GST_DEBUG_OBJECT (pad, "configured SEGMENT %" GST_SEGMENT_FORMAT,
505 GstTagList *tags, *oldtags, *newtags;
507 gst_event_parse_tag (event, &tags);
509 GST_OBJECT_LOCK (selpad);
510 oldtags = selpad->tags;
512 newtags = gst_tag_list_merge (oldtags, tags, GST_TAG_MERGE_REPLACE);
513 selpad->tags = newtags;
514 GST_OBJECT_UNLOCK (selpad);
517 gst_tag_list_unref (oldtags);
518 GST_DEBUG_OBJECT (pad, "received tags %" GST_PTR_FORMAT, newtags);
527 selpad->eos_sent = TRUE;
529 GstSelectorPad *active_selpad;
531 /* If the active sinkpad is in EOS state but EOS
532 * was not sent downstream this means that the pad
533 * got EOS before it was set as active pad and that
534 * the previously active pad got EOS after it was
537 active_selpad = GST_SELECTOR_PAD (active_sinkpad);
538 forward = (active_selpad->eos && !active_selpad->eos_sent);
539 active_selpad->eos_sent = TRUE;
541 GST_DEBUG_OBJECT (pad, "received EOS");
544 GstClockTime ts, dur;
546 GST_DEBUG_OBJECT (pad, "Received gap event: %" GST_PTR_FORMAT, event);
548 gst_event_parse_gap (event, &ts, &dur);
549 if (GST_CLOCK_TIME_IS_VALID (ts)) {
550 if (GST_CLOCK_TIME_IS_VALID (dur))
553 /* update the segment position */
554 GST_OBJECT_LOCK (pad);
555 selpad->segment.position = ts;
556 GST_OBJECT_UNLOCK (pad);
557 if (sel->sync_streams && active_sinkpad == pad)
558 GST_INPUT_SELECTOR_BROADCAST (sel);
566 GST_INPUT_SELECTOR_UNLOCK (sel);
568 g_object_notify (G_OBJECT (selpad), "tags");
570 GST_DEBUG_OBJECT (pad, "forwarding event");
571 res = gst_pad_push_event (sel->srcpad, event);
573 /* If we aren't forwarding the event because the pad is not the
574 * active_sinkpad, then set the flag on the pad
575 * that says a segment needs sending if/when that pad is activated.
576 * For all other cases, we send the event immediately, which makes
577 * sparse streams and other segment updates work correctly downstream.
579 if (GST_EVENT_IS_STICKY (event))
580 selpad->events_pending = TRUE;
581 gst_event_unref (event);
588 gst_selector_pad_query (GstPad * pad, GstObject * parent, GstQuery * query)
590 gboolean res = FALSE;
591 GstInputSelector *self = (GstInputSelector *) parent;
593 switch (GST_QUERY_TYPE (query)) {
595 /* always proxy caps query, regardless of active pad or not */
596 res = gst_pad_peer_query (self->srcpad, query);
598 case GST_QUERY_ALLOCATION:{
599 GstPad *active_sinkpad;
600 GstInputSelector *sel = GST_INPUT_SELECTOR (parent);
602 /* Only do the allocation query for the active sinkpad,
603 * after switching a reconfigure event is sent and upstream
604 * should reconfigure and do a new allocation query
606 if (GST_PAD_DIRECTION (pad) == GST_PAD_SINK) {
607 GST_INPUT_SELECTOR_LOCK (sel);
608 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
609 GST_INPUT_SELECTOR_UNLOCK (sel);
611 if (pad != active_sinkpad) {
619 res = gst_pad_query_default (pad, parent, query);
627 /* must be called with the SELECTOR_LOCK, will block while the pad is blocked
628 * or return TRUE when flushing */
630 gst_input_selector_wait (GstInputSelector * self, GstSelectorPad * pad)
632 while (self->blocked && !self->flushing && !pad->flushing) {
633 /* we can be unlocked here when we are shutting down (flushing) or when we
635 GST_INPUT_SELECTOR_WAIT (self);
637 return self->flushing;
640 /* must be called without the SELECTOR_LOCK, will wait until the running time
641 * of the active pad is after this pad or return TRUE when flushing */
643 gst_input_selector_wait_running_time (GstInputSelector * sel,
644 GstSelectorPad * selpad, GstBuffer * buf)
648 GST_DEBUG_OBJECT (selpad, "entering wait for buffer %p", buf);
650 /* If we have no valid timestamp we can't sync this buffer */
651 if (!GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
652 GST_DEBUG_OBJECT (selpad, "leaving wait for buffer with "
653 "invalid timestamp");
657 seg = &selpad->segment;
660 * a) this is the active pad
661 * b) the pad or the selector is flushing
662 * c) the selector is not blocked
663 * d) the buffer running time is before the current running time
664 * (either active-seg or clock, depending on sync-mode)
667 GST_INPUT_SELECTOR_LOCK (sel);
669 GstPad *active_sinkpad;
670 GstSelectorPad *active_selpad;
672 gint64 cur_running_time;
673 GstClockTime running_time;
676 gst_input_selector_activate_sinkpad (sel, GST_PAD_CAST (selpad));
677 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
679 if (seg->format != GST_FORMAT_TIME) {
680 GST_DEBUG_OBJECT (selpad,
681 "Not waiting because we don't have a TIME segment");
682 GST_INPUT_SELECTOR_UNLOCK (sel);
686 running_time = GST_BUFFER_TIMESTAMP (buf);
687 /* If possible try to get the running time at the end of the buffer */
688 if (GST_BUFFER_DURATION_IS_VALID (buf))
689 running_time += GST_BUFFER_DURATION (buf);
690 /* Only use the segment to convert to running time if the segment is
691 * in TIME format, otherwise do our best to try to sync */
692 if (GST_CLOCK_TIME_IS_VALID (seg->stop)) {
693 if (running_time > seg->stop) {
694 running_time = seg->stop;
698 gst_segment_to_running_time (seg, GST_FORMAT_TIME, running_time);
699 /* If this is outside the segment don't sync */
700 if (running_time == -1) {
701 GST_DEBUG_OBJECT (selpad,
702 "Not waiting because buffer is outside segment");
703 GST_INPUT_SELECTOR_UNLOCK (sel);
707 cur_running_time = GST_CLOCK_TIME_NONE;
708 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
709 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
711 GstClockTime base_time;
713 cur_running_time = gst_clock_get_time (clock);
714 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
715 if (base_time <= cur_running_time)
716 cur_running_time -= base_time;
718 cur_running_time = 0;
720 gst_object_unref (clock);
723 GstSegment *active_seg;
725 active_seg = &active_selpad->segment;
727 /* If the active segment is configured but not to time format
728 * we can't do any syncing at all */
729 if (active_seg->format != GST_FORMAT_TIME
730 && active_seg->format != GST_FORMAT_UNDEFINED) {
731 GST_DEBUG_OBJECT (selpad,
732 "Not waiting because active segment isn't in TIME format");
733 GST_INPUT_SELECTOR_UNLOCK (sel);
737 /* Get active pad's running time, if no configured segment yet keep at -1 */
738 if (active_seg->format == GST_FORMAT_TIME)
739 cur_running_time = gst_segment_to_running_time (active_seg,
740 GST_FORMAT_TIME, active_seg->position);
743 if (selpad != active_selpad && !sel->flushing && !selpad->flushing &&
744 (sel->blocked || cur_running_time == -1
745 || running_time >= cur_running_time)) {
747 GST_DEBUG_OBJECT (selpad,
748 "Waiting for active streams to advance. %" GST_TIME_FORMAT " >= %"
749 GST_TIME_FORMAT, GST_TIME_ARGS (running_time),
750 GST_TIME_ARGS (cur_running_time));
752 GST_DEBUG_OBJECT (selpad, "Waiting for selector to unblock");
754 GST_INPUT_SELECTOR_WAIT (sel);
756 GST_INPUT_SELECTOR_UNLOCK (sel);
761 /* Return TRUE if the selector or the pad is flushing */
762 return (sel->flushing || selpad->flushing);
766 forward_sticky_events (GstPad * sinkpad, GstEvent ** event, gpointer user_data)
768 GstInputSelector *sel = GST_INPUT_SELECTOR (user_data);
770 if (GST_EVENT_TYPE (*event) == GST_EVENT_SEGMENT) {
771 GstSegment *seg = &GST_SELECTOR_PAD (sinkpad)->segment;
774 e = gst_event_new_segment (seg);
775 gst_event_set_seqnum (e, GST_SELECTOR_PAD_CAST (sinkpad)->segment_seqnum);
777 gst_pad_push_event (sel->srcpad, e);
778 } else if (GST_EVENT_TYPE (*event) == GST_EVENT_STREAM_START
779 && !sel->have_group_id) {
781 gst_pad_get_sticky_event (sel->srcpad, GST_EVENT_STREAM_START, 0);
783 /* Only push stream-start once if not all our streams have a stream-id */
785 gst_pad_push_event (sel->srcpad, gst_event_ref (*event));
787 gst_event_unref (tmp);
790 gst_pad_push_event (sel->srcpad, gst_event_ref (*event));
796 #if DEBUG_CACHED_BUFFERS
798 gst_input_selector_debug_cached_buffers (GstInputSelector * sel)
802 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
803 GstSelectorPad *selpad;
808 selpad = GST_SELECTOR_PAD_CAST (walk->data);
809 if (!selpad->cached_buffers) {
810 GST_DEBUG_OBJECT (selpad, "Cached buffers timestamps: <none>");
814 timestamps = g_string_new ("Cached buffers timestamps:");
815 for (i = 0; i < selpad->cached_buffers->length; ++i) {
816 GstSelectorPadCachedBuffer *cached_buffer;
818 cached_buffer = g_queue_peek_nth (selpad->cached_buffers, i);
819 g_string_append_printf (timestamps, " %" GST_TIME_FORMAT,
820 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (cached_buffer->buffer)));
822 str = g_string_free (timestamps, FALSE);
823 GST_DEBUG_OBJECT (selpad, "%s", str);
829 /* must be called with the SELECTOR_LOCK */
831 gst_input_selector_cleanup_old_cached_buffers (GstInputSelector * sel,
835 gint64 cur_running_time;
838 cur_running_time = GST_CLOCK_TIME_NONE;
839 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
840 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
842 GstClockTime base_time;
844 cur_running_time = gst_clock_get_time (clock);
845 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
846 if (base_time <= cur_running_time)
847 cur_running_time -= base_time;
849 cur_running_time = 0;
851 gst_object_unref (clock);
854 GstPad *active_sinkpad;
855 GstSelectorPad *active_selpad;
856 GstSegment *active_seg;
858 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
859 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
860 active_seg = &active_selpad->segment;
862 /* Get active pad's running time, if no configured segment yet keep at -1 */
863 if (active_seg->format == GST_FORMAT_TIME)
864 cur_running_time = gst_segment_to_running_time (active_seg,
865 GST_FORMAT_TIME, active_seg->position);
868 if (!GST_CLOCK_TIME_IS_VALID (cur_running_time))
871 GST_DEBUG_OBJECT (sel, "Cleaning up old cached buffers");
872 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
873 GstSelectorPad *selpad;
875 GstSelectorPadCachedBuffer *cached_buffer;
876 GSList *maybe_remove;
877 guint queue_position;
879 selpad = GST_SELECTOR_PAD_CAST (walk->data);
880 if (!selpad->cached_buffers)
883 seg = &selpad->segment;
887 while ((cached_buffer = g_queue_peek_nth (selpad->cached_buffers,
889 GstBuffer *buffer = cached_buffer->buffer;
890 GstClockTime running_time;
893 /* If we have no valid timestamp we can't sync this buffer */
894 if (!GST_BUFFER_TIMESTAMP_IS_VALID (buffer)) {
895 maybe_remove = g_slist_append (maybe_remove, cached_buffer);
896 queue_position = g_slist_length (maybe_remove);
900 /* the buffer is still valid if its duration is valid and the
901 * timestamp + duration is >= time, or if its duration is invalid
902 * and the timestamp is >= time */
903 running_time = GST_BUFFER_TIMESTAMP (buffer);
904 /* If possible try to get the running time at the end of the buffer */
905 if (GST_BUFFER_DURATION_IS_VALID (buffer))
906 running_time += GST_BUFFER_DURATION (buffer);
907 /* Only use the segment to convert to running time if the segment is
908 * in TIME format, otherwise do our best to try to sync */
909 if (GST_CLOCK_TIME_IS_VALID (seg->stop)) {
910 if (running_time > seg->stop) {
911 running_time = seg->stop;
915 gst_segment_to_running_time (seg, GST_FORMAT_TIME, running_time);
917 GST_DEBUG_OBJECT (selpad,
918 "checking if buffer %p running time=%" GST_TIME_FORMAT
919 " >= stream time=%" GST_TIME_FORMAT, buffer,
920 GST_TIME_ARGS (running_time), GST_TIME_ARGS (cur_running_time));
921 if (running_time >= cur_running_time) {
925 GST_DEBUG_OBJECT (selpad, "Removing old cached buffer %p", buffer);
926 g_queue_pop_nth (selpad->cached_buffers, queue_position);
927 gst_selector_pad_free_cached_buffer (cached_buffer);
929 for (l = maybe_remove; l != NULL; l = g_slist_next (l)) {
930 /* A buffer after some invalid buffers was removed, it means the invalid buffers
931 * are old, lets also remove them */
932 cached_buffer = l->data;
933 g_queue_remove (selpad->cached_buffers, cached_buffer);
934 gst_selector_pad_free_cached_buffer (cached_buffer);
937 g_slist_free (maybe_remove);
942 g_slist_free (maybe_remove);
945 if (g_queue_is_empty (selpad->cached_buffers)) {
946 g_queue_free (selpad->cached_buffers);
947 selpad->cached_buffers = NULL;
951 #if DEBUG_CACHED_BUFFERS
952 gst_input_selector_debug_cached_buffers (sel);
957 gst_selector_pad_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
959 GstInputSelector *sel;
961 GstPad *active_sinkpad;
962 GstPad *prev_active_sinkpad = NULL;
963 GstSelectorPad *selpad;
964 GstClockTime start_time;
966 sel = GST_INPUT_SELECTOR (parent);
967 selpad = GST_SELECTOR_PAD_CAST (pad);
969 GST_DEBUG_OBJECT (selpad,
970 "entering chain for buf %p with timestamp %" GST_TIME_FORMAT, buf,
971 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
973 GST_INPUT_SELECTOR_LOCK (sel);
974 /* wait or check for flushing */
975 if (gst_input_selector_wait (sel, selpad)) {
976 GST_INPUT_SELECTOR_UNLOCK (sel);
980 GST_LOG_OBJECT (pad, "getting active pad");
982 prev_active_sinkpad =
983 sel->active_sinkpad ? gst_object_ref (sel->active_sinkpad) : NULL;
984 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
986 /* In sync mode wait until the active pad has advanced
987 * after the running time of the current buffer */
988 if (sel->sync_streams) {
989 /* call chain for each cached buffer if we are not the active pad
990 * or if we are the active pad but didn't push anything yet. */
991 if (active_sinkpad != pad || !selpad->pushed) {
992 /* no need to check for sel->cache_buffers as selpad->cached_buffers
993 * will only be valid if cache_buffers is TRUE */
994 if (selpad->cached_buffers && !selpad->sending_cached_buffers) {
995 GstSelectorPadCachedBuffer *cached_buffer;
996 GstSegment saved_segment;
998 saved_segment = selpad->segment;
1000 selpad->sending_cached_buffers = TRUE;
1001 while (!sel->flushing && !selpad->flushing &&
1002 (cached_buffer = g_queue_pop_head (selpad->cached_buffers))) {
1003 GST_DEBUG_OBJECT (pad, "Cached buffers found, "
1004 "invoking chain for cached buffer %p", cached_buffer->buffer);
1006 selpad->segment = cached_buffer->segment;
1007 selpad->events_pending = TRUE;
1008 GST_INPUT_SELECTOR_UNLOCK (sel);
1009 gst_selector_pad_chain (pad, parent, cached_buffer->buffer);
1010 GST_INPUT_SELECTOR_LOCK (sel);
1012 /* we may have cleaned up the queue in the meantime because of
1014 if (!selpad->cached_buffers) {
1018 selpad->sending_cached_buffers = FALSE;
1020 /* all cached buffers sent, restore segment for current buffer */
1021 selpad->segment = saved_segment;
1022 selpad->events_pending = TRUE;
1024 /* Might have changed while calling chain for cached buffers */
1025 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
1029 if (active_sinkpad != pad) {
1030 GST_INPUT_SELECTOR_UNLOCK (sel);
1031 if (gst_input_selector_wait_running_time (sel, selpad, buf))
1033 GST_INPUT_SELECTOR_LOCK (sel);
1036 /* Might have changed while waiting */
1037 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
1040 /* update the segment on the srcpad */
1041 start_time = GST_BUFFER_TIMESTAMP (buf);
1042 if (GST_CLOCK_TIME_IS_VALID (start_time)) {
1043 GST_LOG_OBJECT (pad, "received start time %" GST_TIME_FORMAT,
1044 GST_TIME_ARGS (start_time));
1045 if (GST_BUFFER_DURATION_IS_VALID (buf))
1046 GST_LOG_OBJECT (pad, "received end time %" GST_TIME_FORMAT,
1047 GST_TIME_ARGS (start_time + GST_BUFFER_DURATION (buf)));
1049 GST_OBJECT_LOCK (pad);
1050 selpad->segment.position = start_time;
1051 GST_OBJECT_UNLOCK (pad);
1054 /* Ignore buffers from pads except the selected one */
1055 if (pad != active_sinkpad)
1058 /* Tell all non-active pads that we advanced the running time */
1059 if (sel->sync_streams)
1060 GST_INPUT_SELECTOR_BROADCAST (sel);
1062 GST_INPUT_SELECTOR_UNLOCK (sel);
1064 if (prev_active_sinkpad != active_sinkpad) {
1065 if (prev_active_sinkpad)
1066 g_object_notify (G_OBJECT (prev_active_sinkpad), "active");
1067 g_object_notify (G_OBJECT (active_sinkpad), "active");
1068 g_object_notify (G_OBJECT (sel), "active-pad");
1071 /* if we have a pending events, push them now */
1072 if (G_UNLIKELY (prev_active_sinkpad != active_sinkpad
1073 || selpad->events_pending)) {
1074 gst_pad_sticky_events_foreach (GST_PAD_CAST (selpad), forward_sticky_events,
1076 selpad->events_pending = FALSE;
1079 if (prev_active_sinkpad)
1080 gst_object_unref (prev_active_sinkpad);
1081 prev_active_sinkpad = NULL;
1083 if (selpad->discont) {
1084 buf = gst_buffer_make_writable (buf);
1086 GST_DEBUG_OBJECT (pad, "Marking discont buffer %p", buf);
1087 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
1088 selpad->discont = FALSE;
1092 GST_LOG_OBJECT (pad, "Forwarding buffer %p with timestamp %" GST_TIME_FORMAT,
1093 buf, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
1095 /* Only make the buffer read-only when necessary */
1096 if (sel->sync_streams && sel->cache_buffers)
1097 buf = gst_buffer_ref (buf);
1098 res = gst_pad_push (sel->srcpad, buf);
1099 GST_LOG_OBJECT (pad, "Buffer %p forwarded result=%d", buf, res);
1101 GST_INPUT_SELECTOR_LOCK (sel);
1103 if (sel->sync_streams && sel->cache_buffers) {
1104 /* Might have changed while pushing */
1105 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
1106 /* only set pad to pushed if we are still the active pad */
1107 if (active_sinkpad == pad)
1108 selpad->pushed = TRUE;
1110 /* cache buffer as we may need it again if we change pads */
1111 gst_selector_pad_cache_buffer (selpad, buf);
1112 gst_input_selector_cleanup_old_cached_buffers (sel, pad);
1114 selpad->pushed = TRUE;
1116 GST_INPUT_SELECTOR_UNLOCK (sel);
1120 if (prev_active_sinkpad)
1121 gst_object_unref (prev_active_sinkpad);
1122 prev_active_sinkpad = NULL;
1126 /* dropped buffers */
1129 gboolean active_pad_pushed = GST_SELECTOR_PAD_CAST (active_sinkpad)->pushed;
1131 GST_DEBUG_OBJECT (pad, "Pad not active, discard buffer %p", buf);
1132 /* when we drop a buffer, we're creating a discont on this pad */
1133 selpad->discont = TRUE;
1134 GST_INPUT_SELECTOR_UNLOCK (sel);
1135 gst_buffer_unref (buf);
1137 /* figure out what to return upstream */
1138 GST_OBJECT_LOCK (selpad);
1139 if (selpad->always_ok || !active_pad_pushed)
1142 res = GST_FLOW_NOT_LINKED;
1143 GST_OBJECT_UNLOCK (selpad);
1149 GST_DEBUG_OBJECT (pad, "We are flushing, discard buffer %p", buf);
1150 gst_buffer_unref (buf);
1151 res = GST_FLOW_FLUSHING;
1156 static void gst_input_selector_dispose (GObject * object);
1157 static void gst_input_selector_finalize (GObject * object);
1159 static void gst_input_selector_set_property (GObject * object,
1160 guint prop_id, const GValue * value, GParamSpec * pspec);
1161 static void gst_input_selector_get_property (GObject * object,
1162 guint prop_id, GValue * value, GParamSpec * pspec);
1164 static GstPad *gst_input_selector_request_new_pad (GstElement * element,
1165 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps);
1166 static void gst_input_selector_release_pad (GstElement * element, GstPad * pad);
1168 static GstStateChangeReturn gst_input_selector_change_state (GstElement *
1169 element, GstStateChange transition);
1171 static gboolean gst_input_selector_event (GstPad * pad, GstObject * parent,
1173 static gboolean gst_input_selector_query (GstPad * pad, GstObject * parent,
1175 static gint64 gst_input_selector_block (GstInputSelector * self);
1178 GST_DEBUG_CATEGORY_INIT (input_selector_debug, \
1179 "input-selector", 0, "An input stream selector element");
1180 #define gst_input_selector_parent_class parent_class
1181 G_DEFINE_TYPE_WITH_CODE (GstInputSelector, gst_input_selector, GST_TYPE_ELEMENT,
1185 gst_input_selector_class_init (GstInputSelectorClass * klass)
1187 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
1188 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
1190 gobject_class->dispose = gst_input_selector_dispose;
1191 gobject_class->finalize = gst_input_selector_finalize;
1193 gobject_class->set_property = gst_input_selector_set_property;
1194 gobject_class->get_property = gst_input_selector_get_property;
1196 g_object_class_install_property (gobject_class, PROP_N_PADS,
1197 g_param_spec_uint ("n-pads", "Number of Pads",
1198 "The number of sink pads", 0, G_MAXUINT, 0,
1199 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
1201 g_object_class_install_property (gobject_class, PROP_ACTIVE_PAD,
1202 g_param_spec_object ("active-pad", "Active pad",
1203 "The currently active sink pad", GST_TYPE_PAD,
1204 G_PARAM_READWRITE | GST_PARAM_MUTABLE_PLAYING |
1205 G_PARAM_STATIC_STRINGS));
1208 * GstInputSelector:sync-streams
1210 * If set to %TRUE all inactive streams will be synced to the
1211 * running time of the active stream or to the current clock.
1213 * To make sure no buffers are dropped by input-selector
1214 * that might be needed when switching the active pad,
1215 * sync-mode should be set to "clock" and cache-buffers to TRUE.
1217 g_object_class_install_property (gobject_class, PROP_SYNC_STREAMS,
1218 g_param_spec_boolean ("sync-streams", "Sync Streams",
1219 "Synchronize inactive streams to the running time of the active "
1220 "stream or to the current clock",
1221 DEFAULT_SYNC_STREAMS,
1222 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1223 GST_PARAM_MUTABLE_READY));
1226 * GstInputSelector:sync-mode
1228 * Select how input-selector will sync buffers when in sync-streams mode.
1230 * Note that when using the "active-segment" mode, the "active-segment" may
1231 * be ahead of current clock time when switching the active pad, as the current
1232 * active pad may have pushed more buffers than what was displayed/consumed,
1233 * which may cause delays and some missing buffers.
1235 g_object_class_install_property (gobject_class, PROP_SYNC_MODE,
1236 g_param_spec_enum ("sync-mode", "Sync mode",
1237 "Behavior in sync-streams mode", GST_TYPE_INPUT_SELECTOR_SYNC_MODE,
1239 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1240 GST_PARAM_MUTABLE_READY));
1243 * GstInputSelector:cache-buffers
1245 * If set to %TRUE and GstInputSelector:sync-streams is also set to %TRUE,
1246 * the active pad will cache the buffers still considered valid (after current
1247 * running time, see sync-mode) to avoid missing frames if/when the pad is
1250 * The active pad may push more buffers than what is currently displayed/consumed
1251 * and when changing pads those buffers will be discarded and the only way to
1252 * reactivate that pad without loosing the already consumed buffers is to enable cache.
1254 g_object_class_install_property (gobject_class, PROP_CACHE_BUFFERS,
1255 g_param_spec_boolean ("cache-buffers", "Cache Buffers",
1256 "Cache buffers for active-pad",
1257 DEFAULT_CACHE_BUFFERS,
1258 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1259 GST_PARAM_MUTABLE_READY));
1262 * GstInputSelector::block:
1263 * @inputselector: the #GstInputSelector
1265 * Block all sink pads in preparation for a switch. Returns the stop time of
1266 * the current switch segment, as a running time, or 0 if there is no current
1267 * active pad or the current active pad never received data.
1269 gst_input_selector_signals[SIGNAL_BLOCK] =
1270 g_signal_new ("block", G_TYPE_FROM_CLASS (klass),
1271 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1272 G_STRUCT_OFFSET (GstInputSelectorClass, block), NULL, NULL,
1273 g_cclosure_marshal_generic, G_TYPE_INT64, 0);
1275 gst_element_class_set_static_metadata (gstelement_class, "Input selector",
1276 "Generic", "N-to-1 input stream selector",
1277 "Julien Moutte <julien@moutte.net>, "
1278 "Jan Schmidt <thaytan@mad.scientist.com>, "
1279 "Wim Taymans <wim.taymans@gmail.com>");
1280 gst_element_class_add_pad_template (gstelement_class,
1281 gst_static_pad_template_get (&gst_input_selector_sink_factory));
1282 gst_element_class_add_pad_template (gstelement_class,
1283 gst_static_pad_template_get (&gst_input_selector_src_factory));
1285 gstelement_class->request_new_pad = gst_input_selector_request_new_pad;
1286 gstelement_class->release_pad = gst_input_selector_release_pad;
1287 gstelement_class->change_state = gst_input_selector_change_state;
1289 klass->block = GST_DEBUG_FUNCPTR (gst_input_selector_block);
1293 gst_input_selector_init (GstInputSelector * sel)
1295 sel->srcpad = gst_pad_new ("src", GST_PAD_SRC);
1296 gst_pad_set_iterate_internal_links_function (sel->srcpad,
1297 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1298 gst_pad_set_query_function (sel->srcpad,
1299 GST_DEBUG_FUNCPTR (gst_input_selector_query));
1300 gst_pad_set_event_function (sel->srcpad,
1301 GST_DEBUG_FUNCPTR (gst_input_selector_event));
1302 GST_OBJECT_FLAG_SET (sel->srcpad, GST_PAD_FLAG_PROXY_CAPS);
1303 gst_element_add_pad (GST_ELEMENT (sel), sel->srcpad);
1304 /* sinkpad management */
1305 sel->active_sinkpad = NULL;
1307 sel->sync_streams = DEFAULT_SYNC_STREAMS;
1308 sel->have_group_id = TRUE;
1310 g_mutex_init (&sel->lock);
1311 g_cond_init (&sel->cond);
1312 sel->blocked = FALSE;
1314 /* lets give a change for downstream to do something on
1315 * active-pad change before we start pushing new buffers */
1316 g_signal_connect_data (sel, "notify::active-pad",
1317 (GCallback) gst_input_selector_active_pad_changed, NULL,
1318 NULL, G_CONNECT_AFTER);
1322 gst_input_selector_dispose (GObject * object)
1324 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1326 if (sel->active_sinkpad) {
1327 gst_object_unref (sel->active_sinkpad);
1328 sel->active_sinkpad = NULL;
1330 G_OBJECT_CLASS (parent_class)->dispose (object);
1334 gst_input_selector_finalize (GObject * object)
1336 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1338 g_mutex_clear (&sel->lock);
1339 g_cond_clear (&sel->cond);
1341 G_OBJECT_CLASS (parent_class)->finalize (object);
1344 /* this function must be called with the SELECTOR_LOCK. It returns TRUE when the
1345 * active pad changed. */
1347 gst_input_selector_set_active_pad (GstInputSelector * self, GstPad * pad)
1349 GstSelectorPad *old, *new;
1350 GstPad **active_pad_p;
1352 if (pad == self->active_sinkpad)
1355 old = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
1356 new = GST_SELECTOR_PAD_CAST (pad);
1358 GST_DEBUG_OBJECT (self, "setting active pad to %s:%s",
1359 GST_DEBUG_PAD_NAME (new));
1362 old->pushed = FALSE;
1364 new->pushed = FALSE;
1366 /* Send a new SEGMENT event on the new pad next */
1367 if (old != new && new)
1368 new->events_pending = TRUE;
1370 active_pad_p = &self->active_sinkpad;
1371 gst_object_replace ((GstObject **) active_pad_p, GST_OBJECT_CAST (pad));
1373 if (old && old != new)
1374 gst_pad_push_event (GST_PAD_CAST (old), gst_event_new_reconfigure ());
1376 gst_pad_push_event (GST_PAD_CAST (new), gst_event_new_reconfigure ());
1378 GST_DEBUG_OBJECT (self, "New active pad is %" GST_PTR_FORMAT,
1379 self->active_sinkpad);
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 /* query on the srcpad. We override this function because by default it will
1558 * only forward the query to one random sinkpad */
1560 gst_input_selector_query (GstPad * pad, GstObject * parent, GstQuery * query)
1562 gboolean res = FALSE;
1563 GstInputSelector *sel;
1565 sel = GST_INPUT_SELECTOR (parent);
1567 switch (GST_QUERY_TYPE (query)) {
1568 case GST_QUERY_LATENCY:
1571 GstClockTime resmin, resmax;
1578 /* perform the query on all sinkpads and combine the results. We take the
1579 * max of min and the min of max for the result latency. */
1580 GST_INPUT_SELECTOR_LOCK (sel);
1581 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk;
1582 walk = g_list_next (walk)) {
1583 GstPad *sinkpad = GST_PAD_CAST (walk->data);
1585 if (gst_pad_peer_query (sinkpad, query)) {
1586 GstClockTime min, max;
1589 /* one query succeeded, we succeed too */
1592 gst_query_parse_latency (query, &live, &min, &max);
1594 GST_DEBUG_OBJECT (sinkpad,
1595 "peer latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
1596 ", live %d", GST_TIME_ARGS (min), GST_TIME_ARGS (max), live);
1603 else if (max < resmax)
1605 if (reslive == FALSE)
1610 GST_INPUT_SELECTOR_UNLOCK (sel);
1612 gst_query_set_latency (query, reslive, resmin, resmax);
1614 GST_DEBUG_OBJECT (sel,
1615 "total latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
1616 ", live %d", GST_TIME_ARGS (resmin), GST_TIME_ARGS (resmax),
1623 res = gst_pad_query_default (pad, parent, query);
1630 /* check if the pad is the active sinkpad */
1631 static inline gboolean
1632 gst_input_selector_is_active_sinkpad (GstInputSelector * sel, GstPad * pad)
1636 GST_INPUT_SELECTOR_LOCK (sel);
1637 res = (pad == sel->active_sinkpad);
1638 GST_INPUT_SELECTOR_UNLOCK (sel);
1643 /* Get or create the active sinkpad, must be called with SELECTOR_LOCK */
1645 gst_input_selector_activate_sinkpad (GstInputSelector * sel, GstPad * pad)
1647 GstPad *active_sinkpad;
1648 GstSelectorPad *selpad;
1650 selpad = GST_SELECTOR_PAD_CAST (pad);
1652 selpad->active = TRUE;
1653 active_sinkpad = sel->active_sinkpad;
1654 if (sel->active_sinkpad == NULL) {
1655 GValue item = G_VALUE_INIT;
1656 GstIterator *iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1657 GstIteratorResult ires;
1659 while ((ires = gst_iterator_next (iter, &item)) == GST_ITERATOR_RESYNC)
1660 gst_iterator_resync (iter);
1661 if (ires == GST_ITERATOR_OK) {
1662 /* If no pad is currently selected, we return the first usable pad to
1663 * guarantee consistency */
1665 active_sinkpad = sel->active_sinkpad = g_value_dup_object (&item);
1666 g_value_reset (&item);
1667 GST_DEBUG_OBJECT (sel, "Activating pad %s:%s",
1668 GST_DEBUG_PAD_NAME (active_sinkpad));
1670 GST_WARNING_OBJECT (sel, "Couldn't find a default sink pad");
1671 gst_iterator_free (iter);
1674 return active_sinkpad;
1678 gst_input_selector_request_new_pad (GstElement * element,
1679 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps)
1681 GstInputSelector *sel;
1683 GstPad *sinkpad = NULL;
1685 g_return_val_if_fail (templ->direction == GST_PAD_SINK, NULL);
1687 sel = GST_INPUT_SELECTOR (element);
1689 GST_INPUT_SELECTOR_LOCK (sel);
1691 GST_LOG_OBJECT (sel, "Creating new pad sink_%u", sel->padcount);
1692 name = g_strdup_printf ("sink_%u", sel->padcount++);
1693 sinkpad = g_object_new (GST_TYPE_SELECTOR_PAD,
1694 "name", name, "direction", templ->direction, "template", templ, NULL);
1699 gst_pad_set_event_function (sinkpad,
1700 GST_DEBUG_FUNCPTR (gst_selector_pad_event));
1701 gst_pad_set_query_function (sinkpad,
1702 GST_DEBUG_FUNCPTR (gst_selector_pad_query));
1703 gst_pad_set_chain_function (sinkpad,
1704 GST_DEBUG_FUNCPTR (gst_selector_pad_chain));
1705 gst_pad_set_iterate_internal_links_function (sinkpad,
1706 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1708 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_CAPS);
1709 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_ALLOCATION);
1710 gst_pad_set_active (sinkpad, TRUE);
1711 gst_element_add_pad (GST_ELEMENT (sel), sinkpad);
1712 GST_INPUT_SELECTOR_UNLOCK (sel);
1718 gst_input_selector_release_pad (GstElement * element, GstPad * pad)
1720 GstInputSelector *sel;
1722 sel = GST_INPUT_SELECTOR (element);
1723 GST_LOG_OBJECT (sel, "Releasing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1725 GST_INPUT_SELECTOR_LOCK (sel);
1726 /* if the pad was the active pad, makes us select a new one */
1727 if (sel->active_sinkpad == pad) {
1728 GST_DEBUG_OBJECT (sel, "Deactivating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1729 gst_object_unref (sel->active_sinkpad);
1730 sel->active_sinkpad = NULL;
1733 GST_INPUT_SELECTOR_UNLOCK (sel);
1735 gst_pad_set_active (pad, FALSE);
1736 gst_element_remove_pad (GST_ELEMENT (sel), pad);
1740 gst_input_selector_reset (GstInputSelector * sel)
1744 GST_INPUT_SELECTOR_LOCK (sel);
1745 /* clear active pad */
1746 if (sel->active_sinkpad) {
1747 gst_object_unref (sel->active_sinkpad);
1748 sel->active_sinkpad = NULL;
1750 /* reset each of our sinkpads state */
1751 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
1752 GstSelectorPad *selpad = GST_SELECTOR_PAD_CAST (walk->data);
1754 gst_selector_pad_reset (selpad);
1757 gst_tag_list_unref (selpad->tags);
1758 selpad->tags = NULL;
1761 sel->have_group_id = TRUE;
1762 GST_INPUT_SELECTOR_UNLOCK (sel);
1765 static GstStateChangeReturn
1766 gst_input_selector_change_state (GstElement * element,
1767 GstStateChange transition)
1769 GstInputSelector *self = GST_INPUT_SELECTOR (element);
1770 GstStateChangeReturn result;
1772 switch (transition) {
1773 case GST_STATE_CHANGE_READY_TO_PAUSED:
1774 GST_INPUT_SELECTOR_LOCK (self);
1775 self->blocked = FALSE;
1776 self->flushing = FALSE;
1777 GST_INPUT_SELECTOR_UNLOCK (self);
1779 case GST_STATE_CHANGE_PAUSED_TO_READY:
1780 /* first unlock before we call the parent state change function, which
1781 * tries to acquire the stream lock when going to ready. */
1782 GST_INPUT_SELECTOR_LOCK (self);
1783 self->blocked = FALSE;
1784 self->flushing = TRUE;
1785 GST_INPUT_SELECTOR_BROADCAST (self);
1786 GST_INPUT_SELECTOR_UNLOCK (self);
1792 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1794 switch (transition) {
1795 case GST_STATE_CHANGE_PAUSED_TO_READY:
1796 gst_input_selector_reset (self);
1806 gst_input_selector_block (GstInputSelector * self)
1809 GstSelectorPad *spad;
1811 GST_INPUT_SELECTOR_LOCK (self);
1814 GST_WARNING_OBJECT (self, "switch already blocked");
1816 self->blocked = TRUE;
1817 spad = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
1820 ret = gst_selector_pad_get_running_time (spad);
1822 GST_DEBUG_OBJECT (self, "no active pad while blocking");
1824 GST_INPUT_SELECTOR_UNLOCK (self);