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 * @title: input-selector
29 * @see_also: #GstOutputSelector
31 * Direct one out of N input streams to the output pad.
33 * The input pads are from a GstPad subclass and have additional
34 * properties, which users may find useful, namely:
36 * * "running-time": Running time of stream on pad (#gint64)
37 * * "tags": The currently active tags on the pad (#GstTagList, boxed type)
38 * * "active": If the pad is currently active (#gboolean)
39 * * "always-ok" : Make an inactive pads return #GST_FLOW_OK instead of
40 * #GST_FLOW_NOT_LINKED
50 #include "gstinputselector.h"
51 #include "gstcoreelementselements.h"
53 #define DEBUG_CACHED_BUFFERS 0
55 GST_DEBUG_CATEGORY_STATIC (input_selector_debug);
56 #define GST_CAT_DEFAULT input_selector_debug
58 #define GST_TYPE_INPUT_SELECTOR_SYNC_MODE (gst_input_selector_sync_mode_get_type())
60 gst_input_selector_sync_mode_get_type (void)
62 static GType type = 0;
63 static const GEnumValue data[] = {
64 {GST_INPUT_SELECTOR_SYNC_MODE_ACTIVE_SEGMENT,
65 "Sync using the current active segment",
67 {GST_INPUT_SELECTOR_SYNC_MODE_CLOCK, "Sync using the clock", "clock"},
72 type = g_enum_register_static ("GstInputSelectorSyncMode", data);
77 #define GST_INPUT_SELECTOR_GET_LOCK(sel) (&((GstInputSelector*)(sel))->lock)
78 #define GST_INPUT_SELECTOR_GET_COND(sel) (&((GstInputSelector*)(sel))->cond)
79 #define GST_INPUT_SELECTOR_LOCK(sel) (g_mutex_lock (GST_INPUT_SELECTOR_GET_LOCK(sel)))
80 #define GST_INPUT_SELECTOR_UNLOCK(sel) (g_mutex_unlock (GST_INPUT_SELECTOR_GET_LOCK(sel)))
81 #define GST_INPUT_SELECTOR_WAIT(sel) (g_cond_wait (GST_INPUT_SELECTOR_GET_COND(sel), \
82 GST_INPUT_SELECTOR_GET_LOCK(sel)))
83 #define GST_INPUT_SELECTOR_BROADCAST(sel) (g_cond_broadcast (GST_INPUT_SELECTOR_GET_COND(sel)))
85 static GstStaticPadTemplate gst_input_selector_sink_factory =
86 GST_STATIC_PAD_TEMPLATE ("sink_%u",
91 static GstStaticPadTemplate gst_input_selector_src_factory =
92 GST_STATIC_PAD_TEMPLATE ("src",
107 #define DEFAULT_SYNC_STREAMS TRUE
108 #define DEFAULT_SYNC_MODE GST_INPUT_SELECTOR_SYNC_MODE_ACTIVE_SEGMENT
109 #define DEFAULT_CACHE_BUFFERS FALSE
110 #define DEFAULT_PAD_ALWAYS_OK TRUE
115 PROP_PAD_RUNNING_TIME,
121 static void gst_input_selector_active_pad_changed (GstInputSelector * sel,
122 GParamSpec * pspec, gpointer user_data);
123 static inline gboolean gst_input_selector_is_active_sinkpad (GstInputSelector *
125 static GstPad *gst_input_selector_get_active_sinkpad (GstInputSelector * sel);
126 static GstPad *gst_input_selector_get_linked_pad (GstInputSelector * sel,
127 GstPad * pad, gboolean strict);
129 #define GST_TYPE_SELECTOR_PAD \
130 (gst_selector_pad_get_type())
131 #define GST_SELECTOR_PAD(obj) \
132 (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_SELECTOR_PAD, GstSelectorPad))
133 #define GST_SELECTOR_PAD_CLASS(klass) \
134 (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_SELECTOR_PAD, GstSelectorPadClass))
135 #define GST_IS_SELECTOR_PAD(obj) \
136 (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_SELECTOR_PAD))
137 #define GST_IS_SELECTOR_PAD_CLASS(klass) \
138 (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_SELECTOR_PAD))
139 #define GST_SELECTOR_PAD_CAST(obj) \
140 ((GstSelectorPad *)(obj))
142 typedef struct _GstSelectorPad GstSelectorPad;
143 typedef struct _GstSelectorPadClass GstSelectorPadClass;
144 typedef struct _GstSelectorPadCachedBuffer GstSelectorPadCachedBuffer;
146 struct _GstSelectorPad
150 gboolean pushed; /* when buffer was pushed downstream since activation */
151 guint group_id; /* Group ID from the last stream-start */
152 gboolean group_done; /* when Stream Group Done has been
154 gboolean eos; /* when EOS has been received */
155 gboolean eos_sent; /* when EOS was sent downstream */
156 gboolean discont; /* after switching we create a discont */
157 gboolean flushing; /* set after flush-start and before flush-stop */
159 GstTagList *tags; /* last tags received on the pad */
161 GstSegment segment; /* the current segment on the pad */
162 guint32 segment_seqnum; /* sequence number of the current segment */
164 gboolean events_pending; /* TRUE if sticky events need to be updated */
166 gboolean sending_cached_buffers;
167 GQueue *cached_buffers;
170 struct _GstSelectorPadCachedBuffer
176 struct _GstSelectorPadClass
181 GType gst_selector_pad_get_type (void);
182 static void gst_selector_pad_finalize (GObject * object);
183 static void gst_selector_pad_get_property (GObject * object,
184 guint prop_id, GValue * value, GParamSpec * pspec);
185 static void gst_selector_pad_set_property (GObject * object,
186 guint prop_id, const GValue * value, GParamSpec * pspec);
188 static gint64 gst_selector_pad_get_running_time (GstSelectorPad * pad);
189 static void gst_selector_pad_reset (GstSelectorPad * pad);
190 static gboolean gst_selector_pad_event (GstPad * pad, GstObject * parent,
192 static gboolean gst_selector_pad_query (GstPad * pad, GstObject * parent,
194 static GstIterator *gst_selector_pad_iterate_linked_pads (GstPad * pad,
196 static GstFlowReturn gst_selector_pad_chain (GstPad * pad, GstObject * parent,
198 static void gst_selector_pad_cache_buffer (GstSelectorPad * selpad,
200 static void gst_selector_pad_free_cached_buffers (GstSelectorPad * selpad);
202 G_DEFINE_TYPE (GstSelectorPad, gst_selector_pad, GST_TYPE_PAD);
205 gst_selector_pad_class_init (GstSelectorPadClass * klass)
207 GObjectClass *gobject_class;
209 gobject_class = (GObjectClass *) klass;
211 gobject_class->finalize = gst_selector_pad_finalize;
213 gobject_class->get_property = gst_selector_pad_get_property;
214 gobject_class->set_property = gst_selector_pad_set_property;
216 g_object_class_install_property (gobject_class, PROP_PAD_RUNNING_TIME,
217 g_param_spec_int64 ("running-time", "Running time",
218 "Running time of stream on pad", 0, G_MAXINT64, 0,
219 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
220 g_object_class_install_property (gobject_class, PROP_PAD_TAGS,
221 g_param_spec_boxed ("tags", "Tags",
222 "The currently active tags on the pad", GST_TYPE_TAG_LIST,
223 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
224 g_object_class_install_property (gobject_class, PROP_PAD_ACTIVE,
225 g_param_spec_boolean ("active", "Active",
226 "If the pad is currently active", FALSE,
227 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
228 /* FIXME: better property name? */
229 g_object_class_install_property (gobject_class, PROP_PAD_ALWAYS_OK,
230 g_param_spec_boolean ("always-ok", "Always OK",
231 "Make an inactive pad return OK instead of NOT_LINKED",
232 DEFAULT_PAD_ALWAYS_OK, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
236 gst_selector_pad_init (GstSelectorPad * pad)
238 pad->always_ok = DEFAULT_PAD_ALWAYS_OK;
239 gst_selector_pad_reset (pad);
243 gst_selector_pad_finalize (GObject * object)
247 pad = GST_SELECTOR_PAD_CAST (object);
250 gst_tag_list_unref (pad->tags);
251 gst_selector_pad_free_cached_buffers (pad);
253 G_OBJECT_CLASS (gst_selector_pad_parent_class)->finalize (object);
257 gst_selector_pad_set_property (GObject * object, guint prop_id,
258 const GValue * value, GParamSpec * pspec)
260 GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
263 case PROP_PAD_ALWAYS_OK:
264 GST_OBJECT_LOCK (object);
265 spad->always_ok = g_value_get_boolean (value);
266 GST_OBJECT_UNLOCK (object);
269 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
275 gst_selector_pad_get_property (GObject * object, guint prop_id,
276 GValue * value, GParamSpec * pspec)
278 GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
281 case PROP_PAD_RUNNING_TIME:
282 g_value_set_int64 (value, gst_selector_pad_get_running_time (spad));
285 GST_OBJECT_LOCK (object);
286 g_value_set_boxed (value, spad->tags);
287 GST_OBJECT_UNLOCK (object);
289 case PROP_PAD_ACTIVE:
291 GstInputSelector *sel;
293 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (spad));
295 g_value_set_boolean (value, gst_input_selector_is_active_sinkpad (sel,
296 GST_PAD_CAST (spad)));
297 gst_object_unref (sel);
299 g_value_set_boolean (value, FALSE);
303 case PROP_PAD_ALWAYS_OK:
304 GST_OBJECT_LOCK (object);
305 g_value_set_boolean (value, spad->always_ok);
306 GST_OBJECT_UNLOCK (object);
309 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
315 gst_selector_pad_get_running_time (GstSelectorPad * pad)
319 GST_OBJECT_LOCK (pad);
320 if (pad->segment.format == GST_FORMAT_TIME) {
322 gst_segment_to_running_time (&pad->segment, pad->segment.format,
323 pad->segment.position);
325 GST_OBJECT_UNLOCK (pad);
327 GST_DEBUG_OBJECT (pad, "running time: %" GST_TIME_FORMAT
328 " segment: %" GST_SEGMENT_FORMAT, GST_TIME_ARGS (ret), &pad->segment);
333 /* must be called with the SELECTOR_LOCK */
335 gst_selector_pad_reset (GstSelectorPad * pad)
337 GST_OBJECT_LOCK (pad);
339 pad->group_done = FALSE;
341 pad->eos_sent = FALSE;
342 pad->events_pending = FALSE;
343 pad->discont = FALSE;
344 pad->flushing = FALSE;
345 gst_segment_init (&pad->segment, GST_FORMAT_UNDEFINED);
346 pad->sending_cached_buffers = FALSE;
347 gst_selector_pad_free_cached_buffers (pad);
348 GST_OBJECT_UNLOCK (pad);
351 static GstSelectorPadCachedBuffer *
352 gst_selector_pad_new_cached_buffer (GstSelectorPad * selpad, GstBuffer * buffer)
354 GstSelectorPadCachedBuffer *cached_buffer =
355 g_slice_new (GstSelectorPadCachedBuffer);
356 cached_buffer->buffer = buffer;
357 cached_buffer->segment = selpad->segment;
358 return cached_buffer;
362 gst_selector_pad_free_cached_buffer (GstSelectorPadCachedBuffer * cached_buffer)
364 if (cached_buffer->buffer)
365 gst_buffer_unref (cached_buffer->buffer);
366 g_slice_free (GstSelectorPadCachedBuffer, cached_buffer);
369 /* must be called with the SELECTOR_LOCK */
371 gst_selector_pad_cache_buffer (GstSelectorPad * selpad, GstBuffer * buffer)
373 if (selpad->segment.format != GST_FORMAT_TIME) {
374 GST_DEBUG_OBJECT (selpad, "Buffer %p with segment not in time format, "
375 "not caching", buffer);
376 gst_buffer_unref (buffer);
380 GST_DEBUG_OBJECT (selpad, "Caching buffer %p", buffer);
381 if (!selpad->cached_buffers)
382 selpad->cached_buffers = g_queue_new ();
383 g_queue_push_tail (selpad->cached_buffers,
384 gst_selector_pad_new_cached_buffer (selpad, buffer));
387 /* must be called with the SELECTOR_LOCK */
389 gst_selector_pad_free_cached_buffers (GstSelectorPad * selpad)
391 if (!selpad->cached_buffers)
394 GST_DEBUG_OBJECT (selpad, "Freeing cached buffers");
395 g_queue_free_full (selpad->cached_buffers,
396 (GDestroyNotify) gst_selector_pad_free_cached_buffer);
397 selpad->cached_buffers = NULL;
400 /* strictly get the linked pad from the sinkpad. If the pad is active we return
401 * the srcpad else we return NULL */
403 gst_selector_pad_iterate_linked_pads (GstPad * pad, GstObject * parent)
405 GstInputSelector *sel;
407 GstIterator *it = NULL;
410 sel = GST_INPUT_SELECTOR (parent);
412 otherpad = gst_input_selector_get_linked_pad (sel, pad, TRUE);
414 g_value_init (&val, GST_TYPE_PAD);
415 g_value_set_object (&val, otherpad);
416 it = gst_iterator_new_single (GST_TYPE_PAD, &val);
417 g_value_unset (&val);
418 gst_object_unref (otherpad);
425 forward_sticky_events (GstPad * sinkpad, GstEvent ** event, gpointer user_data)
427 GstInputSelector *sel = GST_INPUT_SELECTOR (user_data);
429 GST_DEBUG_OBJECT (sinkpad, "forward sticky event %" GST_PTR_FORMAT, *event);
431 if (GST_EVENT_TYPE (*event) == GST_EVENT_SEGMENT) {
432 GstSegment *seg = &GST_SELECTOR_PAD (sinkpad)->segment;
435 e = gst_event_new_segment (seg);
436 gst_event_set_seqnum (e, GST_SELECTOR_PAD_CAST (sinkpad)->segment_seqnum);
438 gst_pad_push_event (sel->srcpad, e);
439 } else if (GST_EVENT_TYPE (*event) == GST_EVENT_STREAM_START
440 && !sel->have_group_id) {
442 gst_pad_get_sticky_event (sel->srcpad, GST_EVENT_STREAM_START, 0);
444 /* Only push stream-start once if not all our streams have a stream-id */
446 gst_pad_push_event (sel->srcpad, gst_event_ref (*event));
448 gst_event_unref (tmp);
451 gst_pad_push_event (sel->srcpad, gst_event_ref (*event));
458 gst_input_selector_eos_wait (GstInputSelector * self, GstSelectorPad * pad,
459 GstEvent * eos_event)
461 while (!self->eos && !self->flushing && !pad->flushing) {
462 GstPad *active_sinkpad;
463 active_sinkpad = gst_input_selector_get_active_sinkpad (self);
464 if (pad == GST_SELECTOR_PAD_CAST (active_sinkpad) && pad->eos
466 GST_DEBUG_OBJECT (pad, "send EOS event");
467 GST_INPUT_SELECTOR_UNLOCK (self);
468 /* if we have a pending events, push them now */
469 if (pad->events_pending) {
470 gst_pad_sticky_events_foreach (GST_PAD_CAST (pad),
471 forward_sticky_events, self);
472 pad->events_pending = FALSE;
475 gst_pad_push_event (self->srcpad, gst_event_ref (eos_event));
476 GST_INPUT_SELECTOR_LOCK (self);
477 /* Wake up other pads so they can continue when syncing to
478 * running time, as this pad just switched to EOS and
479 * may enable others to progress */
480 GST_INPUT_SELECTOR_BROADCAST (self);
481 pad->eos_sent = TRUE;
483 /* we can be unlocked here when we are shutting down (flushing) or when we
485 GST_INPUT_SELECTOR_WAIT (self);
489 return self->flushing;
493 gst_input_selector_all_eos (GstInputSelector * sel)
497 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = walk->next) {
498 GstSelectorPad *selpad;
500 selpad = GST_SELECTOR_PAD_CAST (walk->data);
511 gst_selector_pad_event (GstPad * pad, GstObject * parent, GstEvent * event)
515 gboolean new_tags = FALSE;
516 GstInputSelector *sel;
517 GstSelectorPad *selpad;
518 GstPad *prev_active_sinkpad;
519 GstPad *active_sinkpad;
521 sel = GST_INPUT_SELECTOR (parent);
522 selpad = GST_SELECTOR_PAD_CAST (pad);
523 GST_DEBUG_OBJECT (selpad, "received event %" GST_PTR_FORMAT, event);
525 GST_INPUT_SELECTOR_LOCK (sel);
526 prev_active_sinkpad =
527 sel->active_sinkpad ? gst_object_ref (sel->active_sinkpad) : NULL;
528 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
529 gst_object_ref (active_sinkpad);
530 GST_INPUT_SELECTOR_UNLOCK (sel);
532 if (prev_active_sinkpad != active_sinkpad) {
533 if (prev_active_sinkpad)
534 g_object_notify (G_OBJECT (prev_active_sinkpad), "active");
535 g_object_notify (G_OBJECT (active_sinkpad), "active");
536 g_object_notify (G_OBJECT (sel), "active-pad");
538 if (prev_active_sinkpad)
539 gst_object_unref (prev_active_sinkpad);
540 gst_object_unref (active_sinkpad);
542 GST_INPUT_SELECTOR_LOCK (sel);
543 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
545 /* only forward if we are dealing with the active sinkpad */
546 forward = (pad == active_sinkpad);
548 switch (GST_EVENT_TYPE (event)) {
549 case GST_EVENT_STREAM_START:{
550 if (!gst_event_parse_group_id (event, &selpad->group_id)) {
551 sel->have_group_id = FALSE;
552 selpad->group_id = 0;
556 case GST_EVENT_FLUSH_START:
557 /* Unblock the pad if it's waiting */
558 selpad->flushing = TRUE;
560 selpad->group_done = FALSE;
561 GST_INPUT_SELECTOR_BROADCAST (sel);
563 case GST_EVENT_FLUSH_STOP:
564 gst_selector_pad_reset (selpad);
566 case GST_EVENT_SEGMENT:
568 gst_event_copy_segment (event, &selpad->segment);
569 selpad->segment_seqnum = gst_event_get_seqnum (event);
571 GST_DEBUG_OBJECT (pad, "configured SEGMENT %" GST_SEGMENT_FORMAT,
577 GstTagList *tags, *oldtags, *newtags;
579 gst_event_parse_tag (event, &tags);
581 GST_OBJECT_LOCK (selpad);
582 oldtags = selpad->tags;
584 newtags = gst_tag_list_merge (oldtags, tags, GST_TAG_MERGE_REPLACE);
585 selpad->tags = newtags;
586 GST_OBJECT_UNLOCK (selpad);
589 gst_tag_list_unref (oldtags);
590 GST_DEBUG_OBJECT (pad, "received tags %" GST_PTR_FORMAT, newtags);
597 GST_DEBUG_OBJECT (pad, "received EOS");
598 if (gst_input_selector_all_eos (sel)) {
599 GST_DEBUG_OBJECT (pad, "All sink pad received EOS");
601 GST_INPUT_SELECTOR_BROADCAST (sel);
603 gst_input_selector_eos_wait (sel, selpad, event);
608 GstClockTime ts, dur;
610 GST_DEBUG_OBJECT (pad, "Received gap event: %" GST_PTR_FORMAT, event);
612 gst_event_parse_gap (event, &ts, &dur);
613 if (GST_CLOCK_TIME_IS_VALID (ts)) {
614 if (GST_CLOCK_TIME_IS_VALID (dur))
617 /* update the segment position */
618 GST_OBJECT_LOCK (pad);
619 selpad->segment.position = ts;
620 GST_OBJECT_UNLOCK (pad);
621 if (sel->sync_streams && active_sinkpad == pad)
622 GST_INPUT_SELECTOR_BROADCAST (sel);
627 case GST_EVENT_STREAM_GROUP_DONE:{
628 GST_DEBUG_OBJECT (sel, "Stream group-done in inputselector pad %s",
629 GST_OBJECT_NAME (selpad));
630 gst_event_parse_stream_group_done (event, &selpad->group_id);
631 selpad->group_done = TRUE;
632 if (sel->sync_streams && active_sinkpad == pad)
633 GST_INPUT_SELECTOR_BROADCAST (sel);
639 GST_INPUT_SELECTOR_UNLOCK (sel);
641 g_object_notify (G_OBJECT (selpad), "tags");
643 GST_DEBUG_OBJECT (pad, "forwarding event");
644 res = gst_pad_push_event (sel->srcpad, event);
646 /* If we aren't forwarding the event because the pad is not the
647 * active_sinkpad, then set the flag on the pad
648 * that says a segment needs sending if/when that pad is activated.
649 * For all other cases, we send the event immediately, which makes
650 * sparse streams and other segment updates work correctly downstream.
652 if (GST_EVENT_IS_STICKY (event))
653 selpad->events_pending = TRUE;
654 gst_event_unref (event);
661 gst_selector_pad_query (GstPad * pad, GstObject * parent, GstQuery * query)
663 gboolean res = FALSE;
664 GstInputSelector *self = (GstInputSelector *) parent;
666 switch (GST_QUERY_TYPE (query)) {
668 case GST_QUERY_POSITION:
669 case GST_QUERY_DURATION:
670 case GST_QUERY_CONTEXT:
671 #ifdef TIZEN_FEATURE_INPUT_SELECTOR_MODIFICATION
672 /* to resolve deadlock during reconfiguration. */
673 case GST_QUERY_BITRATE:
675 /* always proxy caps/position/duration/context queries, regardless of active pad or not
676 * See https://bugzilla.gnome.org/show_bug.cgi?id=775445 */
677 res = gst_pad_peer_query (self->srcpad, query);
679 case GST_QUERY_ALLOCATION:{
680 GstPad *active_sinkpad;
681 GstInputSelector *sel = GST_INPUT_SELECTOR (parent);
683 /* Only do the allocation query for the active sinkpad,
684 * after switching a reconfigure event is sent and upstream
685 * should reconfigure and do a new allocation query
687 if (GST_PAD_DIRECTION (pad) == GST_PAD_SINK) {
688 GST_INPUT_SELECTOR_LOCK (sel);
689 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
690 GST_INPUT_SELECTOR_UNLOCK (sel);
692 if (pad != active_sinkpad) {
700 res = gst_pad_query_default (pad, parent, query);
709 gst_input_selector_get_clipped_running_time (GstSegment * seg, GstBuffer * buf)
711 GstClockTime running_time;
713 running_time = GST_BUFFER_PTS (buf);
714 /* If possible try to get the running time at the end of the buffer */
715 if (GST_BUFFER_DURATION_IS_VALID (buf))
716 running_time += GST_BUFFER_DURATION (buf);
717 /* Only use the segment to convert to running time if the segment is
718 * in TIME format, otherwise do our best to try to sync */
719 if (GST_CLOCK_TIME_IS_VALID (seg->stop)) {
720 if (running_time > seg->stop) {
721 running_time = seg->stop;
724 return gst_segment_to_running_time (seg, GST_FORMAT_TIME, running_time);
727 /* must be called without the SELECTOR_LOCK, will wait until the running time
728 * of the active pad is after this pad or return TRUE when flushing */
730 gst_input_selector_wait_running_time (GstInputSelector * sel,
731 GstSelectorPad * selpad, GstBuffer * buf)
735 GST_DEBUG_OBJECT (selpad, "entering wait for buffer %p", buf);
737 /* If we have no valid timestamp we can't sync this buffer */
738 if (!GST_BUFFER_PTS_IS_VALID (buf)) {
739 GST_DEBUG_OBJECT (selpad, "leaving wait for buffer with "
740 "invalid timestamp");
744 seg = &selpad->segment;
747 * a) this is the active pad
748 * b) the pad or the selector is flushing
749 * c) the buffer running time is before the current running time
750 * (either active-seg or clock, depending on sync-mode)
753 GST_INPUT_SELECTOR_LOCK (sel);
755 GstPad *active_sinkpad;
756 GstSelectorPad *active_selpad;
758 gint64 cur_running_time;
759 GstClockTime running_time;
761 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
762 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
764 if (seg->format != GST_FORMAT_TIME) {
765 GST_DEBUG_OBJECT (selpad,
766 "Not waiting because we don't have a TIME segment");
767 GST_INPUT_SELECTOR_UNLOCK (sel);
771 running_time = gst_input_selector_get_clipped_running_time (seg, buf);
772 /* If this is outside the segment don't sync */
773 if (running_time == -1) {
774 GST_DEBUG_OBJECT (selpad,
775 "Not waiting because buffer is outside segment");
776 GST_INPUT_SELECTOR_UNLOCK (sel);
780 cur_running_time = GST_CLOCK_TIME_NONE;
781 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
782 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
784 GstClockTime base_time;
786 cur_running_time = gst_clock_get_time (clock);
787 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
788 if (base_time <= cur_running_time)
789 cur_running_time -= base_time;
791 cur_running_time = 0;
793 gst_object_unref (clock);
796 GstSegment *active_seg;
798 active_seg = &active_selpad->segment;
800 /* If the active segment is configured but not to time format
801 * we can't do any syncing at all */
802 if ((active_seg->format != GST_FORMAT_TIME
803 && active_seg->format != GST_FORMAT_UNDEFINED)) {
804 GST_DEBUG_OBJECT (selpad,
805 "Not waiting because active segment isn't in TIME format");
806 GST_INPUT_SELECTOR_UNLOCK (sel);
810 /* Get active pad's running time, if no configured segment yet keep at -1 */
811 if (active_seg->format == GST_FORMAT_TIME)
812 cur_running_time = gst_segment_to_running_time (active_seg,
813 GST_FORMAT_TIME, active_seg->position);
816 /* Don't wait if the group is finished on the active pad,
817 * as the running time won't progress now */
818 if (selpad != active_selpad && active_selpad->group_done &&
819 selpad->group_id == active_selpad->group_id) {
820 GST_DEBUG_OBJECT (selpad, "Active pad received group-done. Unblocking");
821 GST_INPUT_SELECTOR_UNLOCK (sel);
825 if (selpad != active_selpad && !sel->eos && !sel->flushing
826 && !selpad->flushing && (cur_running_time == GST_CLOCK_TIME_NONE
827 || running_time >= cur_running_time)) {
828 GST_DEBUG_OBJECT (selpad,
829 "Waiting for active streams to advance. %" GST_TIME_FORMAT " >= %"
830 GST_TIME_FORMAT, GST_TIME_ARGS (running_time),
831 GST_TIME_ARGS (cur_running_time));
832 GST_INPUT_SELECTOR_WAIT (sel);
834 GST_INPUT_SELECTOR_UNLOCK (sel);
839 /* Return TRUE if the selector or the pad is flushing */
840 return (sel->flushing || selpad->flushing);
843 #if DEBUG_CACHED_BUFFERS
845 gst_input_selector_debug_cached_buffers (GstInputSelector * sel)
849 if (gst_debug_category_get_threshold (input_selector_debug) < GST_LEVEL_DEBUG)
852 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = walk->next) {
853 GstSelectorPad *selpad;
857 selpad = GST_SELECTOR_PAD_CAST (walk->data);
858 if (!selpad->cached_buffers) {
859 GST_DEBUG_OBJECT (selpad, "Cached buffers timestamps: <none>");
863 timestamps = g_string_new ("Cached buffers timestamps:");
864 for (l = selpad->cached_buffers->head; l != NULL; l = l->next) {
865 GstSelectorPadCachedBuffer *cached_buffer = l->data;
867 g_string_append_printf (timestamps, " %" GST_TIME_FORMAT,
868 GST_TIME_ARGS (GST_BUFFER_PTS (cached_buffer->buffer)));
870 GST_DEBUG_OBJECT (selpad, "%s", timestamps->str);
871 g_string_free (timestamps, TRUE);
876 /* must be called with the SELECTOR_LOCK */
878 gst_input_selector_cleanup_old_cached_buffers (GstInputSelector * sel,
882 gint64 cur_running_time;
885 cur_running_time = GST_CLOCK_TIME_NONE;
886 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
887 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
889 GstClockTime base_time;
891 cur_running_time = gst_clock_get_time (clock);
892 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
893 if (base_time <= cur_running_time)
894 cur_running_time -= base_time;
896 cur_running_time = 0;
898 gst_object_unref (clock);
901 GstPad *active_sinkpad;
902 GstSelectorPad *active_selpad;
903 GstSegment *active_seg;
905 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
906 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
907 active_seg = &active_selpad->segment;
909 /* Get active pad's running time, if no configured segment yet keep at -1 */
910 if (active_seg->format == GST_FORMAT_TIME)
911 cur_running_time = gst_segment_to_running_time (active_seg,
912 GST_FORMAT_TIME, active_seg->position);
915 if (!GST_CLOCK_TIME_IS_VALID (cur_running_time))
918 GST_DEBUG_OBJECT (sel, "Cleaning up old cached buffers");
919 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
920 GstSelectorPad *selpad;
921 GstSelectorPadCachedBuffer *cached_buffer;
922 GSList *maybe_remove;
923 guint queue_position;
925 selpad = GST_SELECTOR_PAD_CAST (walk->data);
926 if (!selpad->cached_buffers)
931 while ((cached_buffer = g_queue_peek_nth (selpad->cached_buffers,
933 GstBuffer *buffer = cached_buffer->buffer;
934 GstSegment *seg = &cached_buffer->segment;
935 GstClockTime running_time;
938 /* If we have no valid timestamp we can't sync this buffer */
939 if (!GST_BUFFER_PTS_IS_VALID (buffer)) {
940 maybe_remove = g_slist_append (maybe_remove, cached_buffer);
941 queue_position = g_slist_length (maybe_remove);
945 /* the buffer is still valid if its duration is valid and the
946 * timestamp + duration is >= time, or if its duration is invalid
947 * and the timestamp is >= time */
948 running_time = gst_input_selector_get_clipped_running_time (seg, buffer);
949 GST_DEBUG_OBJECT (selpad,
950 "checking if buffer %p running time=%" GST_TIME_FORMAT
951 " >= stream time=%" GST_TIME_FORMAT, buffer,
952 GST_TIME_ARGS (running_time), GST_TIME_ARGS (cur_running_time));
953 if (running_time >= cur_running_time) {
957 GST_DEBUG_OBJECT (selpad, "Removing old cached buffer %p", buffer);
958 g_queue_pop_nth (selpad->cached_buffers, queue_position);
959 gst_selector_pad_free_cached_buffer (cached_buffer);
961 for (l = maybe_remove; l != NULL; l = g_slist_next (l)) {
962 /* A buffer after some invalid buffers was removed, it means the invalid buffers
963 * are old, lets also remove them */
964 cached_buffer = l->data;
965 g_queue_remove (selpad->cached_buffers, cached_buffer);
966 gst_selector_pad_free_cached_buffer (cached_buffer);
969 g_slist_free (maybe_remove);
974 g_slist_free (maybe_remove);
977 if (g_queue_is_empty (selpad->cached_buffers)) {
978 g_queue_free (selpad->cached_buffers);
979 selpad->cached_buffers = NULL;
983 #if DEBUG_CACHED_BUFFERS
984 gst_input_selector_debug_cached_buffers (sel);
989 gst_selector_pad_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
991 GstInputSelector *sel;
993 GstPad *active_sinkpad;
994 GstPad *prev_active_sinkpad = NULL;
995 GstSelectorPad *selpad;
997 sel = GST_INPUT_SELECTOR (parent);
998 selpad = GST_SELECTOR_PAD_CAST (pad);
1000 GST_DEBUG_OBJECT (selpad,
1001 "entering chain for buf %p with timestamp %" GST_TIME_FORMAT, buf,
1002 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
1004 GST_INPUT_SELECTOR_LOCK (sel);
1006 if (sel->flushing) {
1007 GST_INPUT_SELECTOR_UNLOCK (sel);
1011 GST_LOG_OBJECT (pad, "getting active pad");
1013 prev_active_sinkpad =
1014 sel->active_sinkpad ? gst_object_ref (sel->active_sinkpad) : NULL;
1015 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1017 /* In sync mode wait until the active pad has advanced
1018 * after the running time of the current buffer */
1019 if (sel->sync_streams) {
1020 /* call chain for each cached buffer if we are not the active pad
1021 * or if we are the active pad but didn't push anything yet. */
1022 if (active_sinkpad != pad || !selpad->pushed) {
1023 /* no need to check for sel->cache_buffers as selpad->cached_buffers
1024 * will only be valid if cache_buffers is TRUE */
1025 if (selpad->cached_buffers && !selpad->sending_cached_buffers) {
1026 GstSelectorPadCachedBuffer *cached_buffer;
1027 GstSegment saved_segment;
1029 saved_segment = selpad->segment;
1031 selpad->sending_cached_buffers = TRUE;
1032 while (!sel->eos && !sel->flushing && !selpad->flushing &&
1033 (cached_buffer = g_queue_pop_head (selpad->cached_buffers))) {
1034 GST_DEBUG_OBJECT (pad, "Cached buffers found, "
1035 "invoking chain for cached buffer %p", cached_buffer->buffer);
1037 selpad->segment = cached_buffer->segment;
1038 selpad->events_pending = TRUE;
1039 GST_INPUT_SELECTOR_UNLOCK (sel);
1040 gst_selector_pad_chain (pad, parent, cached_buffer->buffer);
1041 GST_INPUT_SELECTOR_LOCK (sel);
1043 /* We just passed the ownership of the buffer to the chain function */
1044 cached_buffer->buffer = NULL;
1045 gst_selector_pad_free_cached_buffer (cached_buffer);
1047 /* we may have cleaned up the queue in the meantime because of
1049 if (!selpad->cached_buffers) {
1053 selpad->sending_cached_buffers = FALSE;
1055 /* all cached buffers sent, restore segment for current buffer */
1056 selpad->segment = saved_segment;
1057 selpad->events_pending = TRUE;
1059 /* Might have changed while calling chain for cached buffers */
1060 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1064 if (active_sinkpad != pad) {
1065 GST_INPUT_SELECTOR_UNLOCK (sel);
1066 if (gst_input_selector_wait_running_time (sel, selpad, buf))
1068 GST_INPUT_SELECTOR_LOCK (sel);
1071 /* Might have changed while waiting */
1072 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1075 /* update the segment on the srcpad */
1076 if (GST_BUFFER_PTS_IS_VALID (buf)) {
1077 GstClockTime start_time = GST_BUFFER_PTS (buf);
1079 GST_LOG_OBJECT (pad, "received start time %" GST_TIME_FORMAT,
1080 GST_TIME_ARGS (start_time));
1081 if (GST_BUFFER_DURATION_IS_VALID (buf))
1082 GST_LOG_OBJECT (pad, "received end time %" GST_TIME_FORMAT,
1083 GST_TIME_ARGS (start_time + GST_BUFFER_DURATION (buf)));
1085 GST_OBJECT_LOCK (pad);
1086 selpad->segment.position = start_time;
1087 GST_OBJECT_UNLOCK (pad);
1090 /* Ignore buffers from pads except the selected one */
1091 if (pad != active_sinkpad)
1094 /* Tell all non-active pads that we advanced the running time */
1095 if (sel->sync_streams)
1096 GST_INPUT_SELECTOR_BROADCAST (sel);
1098 GST_INPUT_SELECTOR_UNLOCK (sel);
1100 if (prev_active_sinkpad != active_sinkpad) {
1101 if (prev_active_sinkpad)
1102 g_object_notify (G_OBJECT (prev_active_sinkpad), "active");
1103 g_object_notify (G_OBJECT (active_sinkpad), "active");
1104 g_object_notify (G_OBJECT (sel), "active-pad");
1107 /* if we have a pending events, push them now */
1108 if (G_UNLIKELY (prev_active_sinkpad != active_sinkpad
1109 || selpad->events_pending)) {
1110 gst_pad_sticky_events_foreach (GST_PAD_CAST (selpad), forward_sticky_events,
1112 selpad->events_pending = FALSE;
1115 if (prev_active_sinkpad) {
1116 gst_object_unref (prev_active_sinkpad);
1117 prev_active_sinkpad = NULL;
1120 if (selpad->discont) {
1121 buf = gst_buffer_make_writable (buf);
1123 GST_DEBUG_OBJECT (pad, "Marking discont buffer %p", buf);
1124 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
1125 selpad->discont = FALSE;
1129 GST_LOG_OBJECT (pad, "Forwarding buffer %p with timestamp %" GST_TIME_FORMAT,
1130 buf, GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
1132 /* Only make the buffer read-only when necessary */
1133 if (sel->sync_streams && sel->cache_buffers)
1134 buf = gst_buffer_ref (buf);
1135 res = gst_pad_push (sel->srcpad, buf);
1136 GST_LOG_OBJECT (pad, "Buffer %p forwarded result=%d", buf, res);
1138 GST_INPUT_SELECTOR_LOCK (sel);
1140 if (sel->sync_streams && sel->cache_buffers) {
1141 /* Might have changed while pushing */
1142 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1143 /* only set pad to pushed if we are still the active pad */
1144 if (active_sinkpad == pad)
1145 selpad->pushed = TRUE;
1147 /* cache buffer as we may need it again if we change pads */
1148 gst_selector_pad_cache_buffer (selpad, buf);
1149 gst_input_selector_cleanup_old_cached_buffers (sel, pad);
1151 selpad->pushed = TRUE;
1153 GST_INPUT_SELECTOR_UNLOCK (sel);
1157 if (prev_active_sinkpad)
1158 gst_object_unref (prev_active_sinkpad);
1159 prev_active_sinkpad = NULL;
1163 /* dropped buffers */
1166 gboolean active_pad_pushed = GST_SELECTOR_PAD_CAST (active_sinkpad)->pushed;
1168 GST_DEBUG_OBJECT (pad, "Pad not active, discard buffer %p", buf);
1169 /* when we drop a buffer, we're creating a discont on this pad */
1170 selpad->discont = TRUE;
1171 GST_INPUT_SELECTOR_UNLOCK (sel);
1172 gst_buffer_unref (buf);
1174 /* figure out what to return upstream */
1175 GST_OBJECT_LOCK (selpad);
1176 if (selpad->always_ok || !active_pad_pushed)
1179 res = GST_FLOW_NOT_LINKED;
1180 GST_OBJECT_UNLOCK (selpad);
1186 GST_DEBUG_OBJECT (pad, "We are flushing, discard buffer %p", buf);
1187 gst_buffer_unref (buf);
1188 res = GST_FLOW_FLUSHING;
1193 static void gst_input_selector_dispose (GObject * object);
1194 static void gst_input_selector_finalize (GObject * object);
1196 static void gst_input_selector_set_property (GObject * object,
1197 guint prop_id, const GValue * value, GParamSpec * pspec);
1198 static void gst_input_selector_get_property (GObject * object,
1199 guint prop_id, GValue * value, GParamSpec * pspec);
1201 static GstPad *gst_input_selector_request_new_pad (GstElement * element,
1202 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps);
1203 static void gst_input_selector_release_pad (GstElement * element, GstPad * pad);
1205 static GstStateChangeReturn gst_input_selector_change_state (GstElement *
1206 element, GstStateChange transition);
1208 static gboolean gst_input_selector_event (GstPad * pad, GstObject * parent,
1210 static gboolean gst_input_selector_query (GstPad * pad, GstObject * parent,
1214 GST_DEBUG_CATEGORY_INIT (input_selector_debug, \
1215 "input-selector", 0, "An input stream selector element");
1216 #define gst_input_selector_parent_class parent_class
1217 G_DEFINE_TYPE_WITH_CODE (GstInputSelector, gst_input_selector, GST_TYPE_ELEMENT,
1219 GST_ELEMENT_REGISTER_DEFINE (input_selector, "input-selector", GST_RANK_NONE,
1220 GST_TYPE_INPUT_SELECTOR);
1223 gst_input_selector_class_init (GstInputSelectorClass * klass)
1225 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
1226 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
1228 gobject_class->dispose = gst_input_selector_dispose;
1229 gobject_class->finalize = gst_input_selector_finalize;
1231 gobject_class->set_property = gst_input_selector_set_property;
1232 gobject_class->get_property = gst_input_selector_get_property;
1234 g_object_class_install_property (gobject_class, PROP_N_PADS,
1235 g_param_spec_uint ("n-pads", "Number of Pads",
1236 "The number of sink pads", 0, G_MAXUINT, 0,
1237 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
1239 g_object_class_install_property (gobject_class, PROP_ACTIVE_PAD,
1240 g_param_spec_object ("active-pad", "Active pad",
1241 "The currently active sink pad", GST_TYPE_PAD,
1242 G_PARAM_READWRITE | GST_PARAM_MUTABLE_PLAYING |
1243 G_PARAM_STATIC_STRINGS));
1246 * GstInputSelector:sync-streams
1248 * If set to %TRUE all inactive streams will be synced to the
1249 * running time of the active stream or to the current clock.
1251 * To make sure no buffers are dropped by input-selector
1252 * that might be needed when switching the active pad,
1253 * sync-mode should be set to "clock" and cache-buffers to TRUE.
1255 g_object_class_install_property (gobject_class, PROP_SYNC_STREAMS,
1256 g_param_spec_boolean ("sync-streams", "Sync Streams",
1257 "Synchronize inactive streams to the running time of the active "
1258 "stream or to the current clock",
1259 DEFAULT_SYNC_STREAMS,
1260 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1261 GST_PARAM_MUTABLE_READY));
1264 * GstInputSelector:sync-mode
1266 * Select how input-selector will sync buffers when in sync-streams mode.
1268 * Note that when using the "active-segment" mode, the "active-segment" may
1269 * be ahead of current clock time when switching the active pad, as the current
1270 * active pad may have pushed more buffers than what was displayed/consumed,
1271 * which may cause delays and some missing buffers.
1273 g_object_class_install_property (gobject_class, PROP_SYNC_MODE,
1274 g_param_spec_enum ("sync-mode", "Sync mode",
1275 "Behavior in sync-streams mode", GST_TYPE_INPUT_SELECTOR_SYNC_MODE,
1277 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1278 GST_PARAM_MUTABLE_READY));
1281 * GstInputSelector:cache-buffers
1283 * If set to %TRUE and GstInputSelector:sync-streams is also set to %TRUE,
1284 * the active pad will cache the buffers still considered valid (after current
1285 * running time, see sync-mode) to avoid missing frames if/when the pad is
1288 * The active pad may push more buffers than what is currently displayed/consumed
1289 * and when changing pads those buffers will be discarded and the only way to
1290 * reactivate that pad without losing the already consumed buffers is to enable cache.
1292 g_object_class_install_property (gobject_class, PROP_CACHE_BUFFERS,
1293 g_param_spec_boolean ("cache-buffers", "Cache Buffers",
1294 "Cache buffers for active-pad",
1295 DEFAULT_CACHE_BUFFERS,
1296 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1297 GST_PARAM_MUTABLE_READY));
1299 gst_element_class_set_static_metadata (gstelement_class, "Input selector",
1300 "Generic", "N-to-1 input stream selector",
1301 "Julien Moutte <julien@moutte.net>, "
1302 "Jan Schmidt <thaytan@mad.scientist.com>, "
1303 "Wim Taymans <wim.taymans@gmail.com>");
1304 gst_element_class_add_static_pad_template_with_gtype (gstelement_class,
1305 &gst_input_selector_sink_factory, GST_TYPE_SELECTOR_PAD);
1306 gst_element_class_add_static_pad_template (gstelement_class,
1307 &gst_input_selector_src_factory);
1309 gstelement_class->request_new_pad = gst_input_selector_request_new_pad;
1310 gstelement_class->release_pad = gst_input_selector_release_pad;
1311 gstelement_class->change_state = gst_input_selector_change_state;
1313 gst_type_mark_as_plugin_api (GST_TYPE_SELECTOR_PAD, 0);
1314 gst_type_mark_as_plugin_api (GST_TYPE_INPUT_SELECTOR_SYNC_MODE, 0);
1318 gst_input_selector_init (GstInputSelector * sel)
1320 sel->srcpad = gst_pad_new ("src", GST_PAD_SRC);
1321 gst_pad_set_iterate_internal_links_function (sel->srcpad,
1322 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1323 gst_pad_set_event_function (sel->srcpad,
1324 GST_DEBUG_FUNCPTR (gst_input_selector_event));
1325 gst_pad_set_query_function (sel->srcpad,
1326 GST_DEBUG_FUNCPTR (gst_input_selector_query));
1327 GST_OBJECT_FLAG_SET (sel->srcpad, GST_PAD_FLAG_PROXY_CAPS);
1328 gst_element_add_pad (GST_ELEMENT (sel), sel->srcpad);
1329 /* sinkpad management */
1330 sel->active_sinkpad = NULL;
1332 sel->sync_streams = DEFAULT_SYNC_STREAMS;
1333 sel->sync_mode = DEFAULT_SYNC_MODE;
1334 sel->have_group_id = TRUE;
1336 g_mutex_init (&sel->lock);
1337 g_cond_init (&sel->cond);
1340 /* lets give a change for downstream to do something on
1341 * active-pad change before we start pushing new buffers */
1342 g_signal_connect_data (sel, "notify::active-pad",
1343 (GCallback) gst_input_selector_active_pad_changed, NULL,
1344 NULL, G_CONNECT_AFTER);
1348 gst_input_selector_dispose (GObject * object)
1350 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1352 if (sel->active_sinkpad) {
1353 gst_object_unref (sel->active_sinkpad);
1354 sel->active_sinkpad = NULL;
1356 G_OBJECT_CLASS (parent_class)->dispose (object);
1360 gst_input_selector_finalize (GObject * object)
1362 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1364 g_mutex_clear (&sel->lock);
1365 g_cond_clear (&sel->cond);
1367 G_OBJECT_CLASS (parent_class)->finalize (object);
1370 /* this function must be called with the SELECTOR_LOCK. It returns TRUE when the
1371 * active pad changed. */
1373 gst_input_selector_set_active_pad (GstInputSelector * self, GstPad * pad)
1375 GstSelectorPad *old, *new;
1376 GstPad **active_pad_p;
1378 if (pad == self->active_sinkpad)
1381 /* guard against users setting a src pad or foreign pad as active pad */
1383 g_return_val_if_fail (GST_PAD_IS_SINK (pad), FALSE);
1384 g_return_val_if_fail (GST_IS_SELECTOR_PAD (pad), FALSE);
1385 g_return_val_if_fail (GST_PAD_PARENT (pad) == GST_ELEMENT_CAST (self),
1389 old = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
1390 new = GST_SELECTOR_PAD_CAST (pad);
1392 GST_DEBUG_OBJECT (self, "setting active pad to %s:%s",
1393 GST_DEBUG_PAD_NAME (new));
1396 old->pushed = FALSE;
1398 new->pushed = FALSE;
1400 /* Send a new SEGMENT event on the new pad next */
1401 if (old != new && new)
1402 new->events_pending = TRUE;
1404 active_pad_p = &self->active_sinkpad;
1405 gst_object_replace ((GstObject **) active_pad_p, GST_OBJECT_CAST (pad));
1407 if (old && old != new)
1408 gst_pad_push_event (GST_PAD_CAST (old), gst_event_new_reconfigure ());
1410 gst_pad_push_event (GST_PAD_CAST (new), gst_event_new_reconfigure ());
1412 GST_DEBUG_OBJECT (self, "New active pad is %" GST_PTR_FORMAT,
1413 self->active_sinkpad);
1415 if (old != new && new && new->eos) {
1416 new->eos_sent = FALSE;
1417 GST_INPUT_SELECTOR_BROADCAST (self);
1424 gst_input_selector_set_property (GObject * object, guint prop_id,
1425 const GValue * value, GParamSpec * pspec)
1427 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1430 case PROP_ACTIVE_PAD:
1434 pad = g_value_get_object (value);
1436 GST_INPUT_SELECTOR_LOCK (sel);
1438 sel->active_sinkpad_from_user = ! !pad;
1439 #if DEBUG_CACHED_BUFFERS
1440 gst_input_selector_debug_cached_buffers (sel);
1443 gst_input_selector_set_active_pad (sel, pad);
1445 #if DEBUG_CACHED_BUFFERS
1446 gst_input_selector_debug_cached_buffers (sel);
1449 GST_INPUT_SELECTOR_UNLOCK (sel);
1452 case PROP_SYNC_STREAMS:
1453 GST_INPUT_SELECTOR_LOCK (sel);
1454 sel->sync_streams = g_value_get_boolean (value);
1455 GST_INPUT_SELECTOR_UNLOCK (sel);
1457 case PROP_SYNC_MODE:
1458 GST_INPUT_SELECTOR_LOCK (sel);
1459 sel->sync_mode = g_value_get_enum (value);
1460 GST_INPUT_SELECTOR_UNLOCK (sel);
1462 case PROP_CACHE_BUFFERS:
1463 GST_INPUT_SELECTOR_LOCK (object);
1464 sel->cache_buffers = g_value_get_boolean (value);
1465 GST_INPUT_SELECTOR_UNLOCK (object);
1468 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1474 gst_input_selector_active_pad_changed (GstInputSelector * sel,
1475 GParamSpec * pspec, gpointer user_data)
1477 /* Wake up all non-active pads in sync mode, they might be
1478 * the active pad now */
1479 if (sel->sync_streams)
1480 GST_INPUT_SELECTOR_BROADCAST (sel);
1484 gst_input_selector_get_property (GObject * object, guint prop_id,
1485 GValue * value, GParamSpec * pspec)
1487 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1491 GST_INPUT_SELECTOR_LOCK (object);
1492 g_value_set_uint (value, sel->n_pads);
1493 GST_INPUT_SELECTOR_UNLOCK (object);
1495 case PROP_ACTIVE_PAD:
1496 GST_INPUT_SELECTOR_LOCK (object);
1497 g_value_set_object (value, sel->active_sinkpad);
1498 GST_INPUT_SELECTOR_UNLOCK (object);
1500 case PROP_SYNC_STREAMS:
1501 GST_INPUT_SELECTOR_LOCK (object);
1502 g_value_set_boolean (value, sel->sync_streams);
1503 GST_INPUT_SELECTOR_UNLOCK (object);
1505 case PROP_SYNC_MODE:
1506 GST_INPUT_SELECTOR_LOCK (object);
1507 g_value_set_enum (value, sel->sync_mode);
1508 GST_INPUT_SELECTOR_UNLOCK (object);
1510 case PROP_CACHE_BUFFERS:
1511 GST_INPUT_SELECTOR_LOCK (object);
1512 g_value_set_boolean (value, sel->cache_buffers);
1513 GST_INPUT_SELECTOR_UNLOCK (object);
1516 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1522 gst_input_selector_get_linked_pad (GstInputSelector * sel, GstPad * pad,
1525 GstPad *otherpad = NULL;
1527 GST_INPUT_SELECTOR_LOCK (sel);
1528 if (pad == sel->srcpad)
1529 otherpad = sel->active_sinkpad;
1530 else if (pad == sel->active_sinkpad || !strict)
1531 otherpad = sel->srcpad;
1533 gst_object_ref (otherpad);
1534 GST_INPUT_SELECTOR_UNLOCK (sel);
1540 gst_input_selector_event (GstPad * pad, GstObject * parent, GstEvent * event)
1542 GstInputSelector *sel;
1543 gboolean result = FALSE;
1545 gboolean done = FALSE;
1546 GValue item = { 0, };
1548 GList *pushed_pads = NULL;
1550 sel = GST_INPUT_SELECTOR (parent);
1551 /* Send upstream events to all sinkpads */
1552 iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1554 GST_INPUT_SELECTOR_LOCK (sel);
1555 if (sel->active_sinkpad) {
1556 eventpad = gst_object_ref (sel->active_sinkpad);
1557 GST_INPUT_SELECTOR_UNLOCK (sel);
1559 gst_event_ref (event);
1560 result |= gst_pad_push_event (eventpad, event);
1561 pushed_pads = g_list_append (pushed_pads, eventpad);
1562 gst_object_unref (eventpad);
1564 GST_INPUT_SELECTOR_UNLOCK (sel);
1567 /* This is now essentially a copy of gst_pad_event_default_dispatch
1568 * with a different iterator */
1570 switch (gst_iterator_next (iter, &item)) {
1571 case GST_ITERATOR_OK:
1572 eventpad = g_value_get_object (&item);
1574 /* if already pushed, skip */
1575 if (g_list_find (pushed_pads, eventpad)) {
1576 g_value_reset (&item);
1580 gst_event_ref (event);
1581 result |= gst_pad_push_event (eventpad, event);
1582 pushed_pads = g_list_append (pushed_pads, eventpad);
1584 g_value_reset (&item);
1586 case GST_ITERATOR_RESYNC:
1587 /* We don't reset the result here because we don't push the event
1588 * again on pads that got the event already and because we need
1589 * to consider the result of the previous pushes */
1590 gst_iterator_resync (iter);
1592 case GST_ITERATOR_ERROR:
1593 GST_ERROR_OBJECT (pad, "Could not iterate over sinkpads");
1596 case GST_ITERATOR_DONE:
1601 g_value_unset (&item);
1602 gst_iterator_free (iter);
1604 g_list_free (pushed_pads);
1606 gst_event_unref (event);
1614 GstClockTime min, max;
1618 query_latency_default_fold (const GValue * item, GValue * ret,
1621 GstPad *pad = g_value_get_object (item), *peer;
1622 LatencyFoldData *fold_data = user_data;
1624 gboolean res = FALSE;
1626 query = gst_query_new_latency ();
1628 peer = gst_pad_get_peer (pad);
1630 res = gst_pad_peer_query (pad, query);
1632 GST_LOG_OBJECT (pad, "No peer pad found, ignoring this pad");
1637 GstClockTime min, max;
1639 gst_query_parse_latency (query, &live, &min, &max);
1641 GST_LOG_OBJECT (pad, "got latency live:%s min:%" G_GINT64_FORMAT
1642 " max:%" G_GINT64_FORMAT, live ? "true" : "false", min, max);
1645 if (min > fold_data->min)
1646 fold_data->min = min;
1648 if (fold_data->max == GST_CLOCK_TIME_NONE)
1649 fold_data->max = max;
1650 else if (max < fold_data->max)
1651 fold_data->max = max;
1652 fold_data->live = live;
1655 GST_DEBUG_OBJECT (pad, "latency query failed");
1656 g_value_set_boolean (ret, FALSE);
1659 gst_query_unref (query);
1661 gst_object_unref (peer);
1667 gst_input_selector_query_latency (GstInputSelector * sel, GstPad * pad,
1671 GstIteratorResult res;
1672 GValue ret = G_VALUE_INIT;
1674 LatencyFoldData fold_data;
1676 /* This is basically gst_pad_query_latency_default() but with a different
1677 * iterator. We query all sinkpads! */
1678 it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1680 GST_DEBUG_OBJECT (pad, "Can't iterate internal links");
1684 g_value_init (&ret, G_TYPE_BOOLEAN);
1687 fold_data.live = FALSE;
1689 fold_data.max = GST_CLOCK_TIME_NONE;
1691 g_value_set_boolean (&ret, TRUE);
1692 res = gst_iterator_fold (it, query_latency_default_fold, &ret, &fold_data);
1694 case GST_ITERATOR_OK:
1695 g_assert_not_reached ();
1697 case GST_ITERATOR_DONE:
1699 case GST_ITERATOR_ERROR:
1700 g_value_set_boolean (&ret, FALSE);
1702 case GST_ITERATOR_RESYNC:
1703 gst_iterator_resync (it);
1706 g_assert_not_reached ();
1709 gst_iterator_free (it);
1711 query_ret = g_value_get_boolean (&ret);
1713 GST_LOG_OBJECT (pad, "got latency live:%s min:%" G_GINT64_FORMAT
1714 " max:%" G_GINT64_FORMAT, fold_data.live ? "true" : "false",
1715 fold_data.min, fold_data.max);
1717 if (fold_data.min > fold_data.max) {
1718 GST_ERROR_OBJECT (pad, "minimum latency bigger than maximum latency");
1721 gst_query_set_latency (query, fold_data.live, fold_data.min, fold_data.max);
1723 GST_LOG_OBJECT (pad, "latency query failed");
1730 gst_input_selector_query (GstPad * pad, GstObject * parent, GstQuery * query)
1732 GstInputSelector *sel = GST_INPUT_SELECTOR (parent);
1734 switch (GST_QUERY_TYPE (query)) {
1735 case GST_QUERY_LATENCY:
1736 /* Query all sink pads for the latency, not just the active one */
1737 return gst_input_selector_query_latency (sel, pad, query);
1739 return gst_pad_query_default (pad, parent, query);
1743 /* check if the pad is the active sinkpad */
1744 static inline gboolean
1745 gst_input_selector_is_active_sinkpad (GstInputSelector * sel, GstPad * pad)
1749 GST_INPUT_SELECTOR_LOCK (sel);
1750 res = (pad == sel->active_sinkpad);
1751 GST_INPUT_SELECTOR_UNLOCK (sel);
1756 /* Get or create the active sinkpad, must be called with SELECTOR_LOCK */
1758 gst_input_selector_get_active_sinkpad (GstInputSelector * sel)
1760 GstPad *active_sinkpad;
1762 active_sinkpad = sel->active_sinkpad;
1763 if (active_sinkpad == NULL) {
1764 GValue item = G_VALUE_INIT;
1765 GstIterator *iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1766 GstIteratorResult ires;
1768 while ((ires = gst_iterator_next (iter, &item)) == GST_ITERATOR_RESYNC)
1769 gst_iterator_resync (iter);
1770 if (ires == GST_ITERATOR_OK) {
1771 /* If no pad is currently selected, we return the first usable pad to
1772 * guarantee consistency */
1774 active_sinkpad = sel->active_sinkpad = g_value_dup_object (&item);
1775 g_value_reset (&item);
1776 GST_DEBUG_OBJECT (sel, "Activating pad %s:%s",
1777 GST_DEBUG_PAD_NAME (active_sinkpad));
1779 GST_WARNING_OBJECT (sel, "Couldn't find a default sink pad");
1780 gst_iterator_free (iter);
1783 return active_sinkpad;
1787 gst_input_selector_request_new_pad (GstElement * element,
1788 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps)
1790 GstInputSelector *sel;
1792 GstPad *sinkpad = NULL;
1794 g_return_val_if_fail (templ->direction == GST_PAD_SINK, NULL);
1796 sel = GST_INPUT_SELECTOR (element);
1798 GST_INPUT_SELECTOR_LOCK (sel);
1800 GST_LOG_OBJECT (sel, "Creating new pad sink_%u", sel->padcount);
1801 name = g_strdup_printf ("sink_%u", sel->padcount++);
1802 sinkpad = g_object_new (GST_TYPE_SELECTOR_PAD,
1803 "name", name, "direction", templ->direction, "template", templ, NULL);
1808 gst_pad_set_event_function (sinkpad,
1809 GST_DEBUG_FUNCPTR (gst_selector_pad_event));
1810 gst_pad_set_query_function (sinkpad,
1811 GST_DEBUG_FUNCPTR (gst_selector_pad_query));
1812 gst_pad_set_chain_function (sinkpad,
1813 GST_DEBUG_FUNCPTR (gst_selector_pad_chain));
1814 gst_pad_set_iterate_internal_links_function (sinkpad,
1815 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1817 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_CAPS);
1818 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_ALLOCATION);
1819 gst_pad_set_active (sinkpad, TRUE);
1820 GST_INPUT_SELECTOR_UNLOCK (sel);
1821 gst_element_add_pad (GST_ELEMENT (sel), sinkpad);
1827 gst_input_selector_release_pad (GstElement * element, GstPad * pad)
1829 GstSelectorPad *selpad;
1830 GstInputSelector *sel;
1832 sel = GST_INPUT_SELECTOR (element);
1833 selpad = GST_SELECTOR_PAD (pad);
1834 GST_LOG_OBJECT (sel, "Releasing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1836 GST_INPUT_SELECTOR_LOCK (sel);
1837 /* if the pad was the active pad, makes us select a new one */
1838 if (sel->active_sinkpad == pad) {
1839 GST_DEBUG_OBJECT (sel, "Deactivating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1840 gst_object_unref (sel->active_sinkpad);
1841 sel->active_sinkpad = NULL;
1842 sel->active_sinkpad_from_user = FALSE;
1845 /* wake up the pad if it's currently waiting for EOS or a running time to be
1846 * reached. Otherwise we'll deadlock on the streaming thread further below
1847 * when deactivating the pad. */
1848 selpad->flushing = TRUE;
1849 GST_INPUT_SELECTOR_BROADCAST (sel);
1852 GST_INPUT_SELECTOR_UNLOCK (sel);
1854 gst_pad_set_active (pad, FALSE);
1855 gst_element_remove_pad (GST_ELEMENT (sel), pad);
1859 gst_input_selector_reset (GstInputSelector * sel)
1863 GST_INPUT_SELECTOR_LOCK (sel);
1864 /* clear active pad */
1865 if (sel->active_sinkpad && !sel->active_sinkpad_from_user) {
1866 gst_object_unref (sel->active_sinkpad);
1867 sel->active_sinkpad = NULL;
1869 sel->eos_sent = FALSE;
1871 /* reset each of our sinkpads state */
1872 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
1873 GstSelectorPad *selpad = GST_SELECTOR_PAD_CAST (walk->data);
1875 gst_selector_pad_reset (selpad);
1878 gst_tag_list_unref (selpad->tags);
1879 selpad->tags = NULL;
1882 sel->have_group_id = TRUE;
1883 GST_INPUT_SELECTOR_UNLOCK (sel);
1886 static GstStateChangeReturn
1887 gst_input_selector_change_state (GstElement * element,
1888 GstStateChange transition)
1890 GstInputSelector *self = GST_INPUT_SELECTOR (element);
1891 GstStateChangeReturn result;
1893 switch (transition) {
1894 case GST_STATE_CHANGE_READY_TO_PAUSED:
1895 GST_INPUT_SELECTOR_LOCK (self);
1897 self->flushing = FALSE;
1898 GST_INPUT_SELECTOR_UNLOCK (self);
1900 case GST_STATE_CHANGE_PAUSED_TO_READY:
1901 /* first unlock before we call the parent state change function, which
1902 * tries to acquire the stream lock when going to ready. */
1903 GST_INPUT_SELECTOR_LOCK (self);
1905 self->flushing = TRUE;
1906 GST_INPUT_SELECTOR_BROADCAST (self);
1907 GST_INPUT_SELECTOR_UNLOCK (self);
1913 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1915 switch (transition) {
1916 case GST_STATE_CHANGE_PAUSED_TO_READY:
1917 gst_input_selector_reset (self);