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"
52 #define DEBUG_CACHED_BUFFERS 0
54 GST_DEBUG_CATEGORY_STATIC (input_selector_debug);
55 #define GST_CAT_DEFAULT input_selector_debug
57 #define GST_TYPE_INPUT_SELECTOR_SYNC_MODE (gst_input_selector_sync_mode_get_type())
59 gst_input_selector_sync_mode_get_type (void)
61 static GType type = 0;
62 static const GEnumValue data[] = {
63 {GST_INPUT_SELECTOR_SYNC_MODE_ACTIVE_SEGMENT,
64 "Sync using the current active segment",
66 {GST_INPUT_SELECTOR_SYNC_MODE_CLOCK, "Sync using the clock", "clock"},
71 type = g_enum_register_static ("GstInputSelectorSyncMode", data);
76 #define GST_INPUT_SELECTOR_GET_LOCK(sel) (&((GstInputSelector*)(sel))->lock)
77 #define GST_INPUT_SELECTOR_GET_COND(sel) (&((GstInputSelector*)(sel))->cond)
78 #define GST_INPUT_SELECTOR_LOCK(sel) (g_mutex_lock (GST_INPUT_SELECTOR_GET_LOCK(sel)))
79 #define GST_INPUT_SELECTOR_UNLOCK(sel) (g_mutex_unlock (GST_INPUT_SELECTOR_GET_LOCK(sel)))
80 #define GST_INPUT_SELECTOR_WAIT(sel) (g_cond_wait (GST_INPUT_SELECTOR_GET_COND(sel), \
81 GST_INPUT_SELECTOR_GET_LOCK(sel)))
82 #define GST_INPUT_SELECTOR_BROADCAST(sel) (g_cond_broadcast (GST_INPUT_SELECTOR_GET_COND(sel)))
84 static GstStaticPadTemplate gst_input_selector_sink_factory =
85 GST_STATIC_PAD_TEMPLATE ("sink_%u",
90 static GstStaticPadTemplate gst_input_selector_src_factory =
91 GST_STATIC_PAD_TEMPLATE ("src",
106 #define DEFAULT_SYNC_STREAMS TRUE
107 #define DEFAULT_SYNC_MODE GST_INPUT_SELECTOR_SYNC_MODE_ACTIVE_SEGMENT
108 #define DEFAULT_CACHE_BUFFERS FALSE
109 #define DEFAULT_PAD_ALWAYS_OK TRUE
114 PROP_PAD_RUNNING_TIME,
120 static void gst_input_selector_active_pad_changed (GstInputSelector * sel,
121 GParamSpec * pspec, gpointer user_data);
122 static inline gboolean gst_input_selector_is_active_sinkpad (GstInputSelector *
124 static GstPad *gst_input_selector_get_active_sinkpad (GstInputSelector * sel);
125 static GstPad *gst_input_selector_get_linked_pad (GstInputSelector * sel,
126 GstPad * pad, gboolean strict);
128 #define GST_TYPE_SELECTOR_PAD \
129 (gst_selector_pad_get_type())
130 #define GST_SELECTOR_PAD(obj) \
131 (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_SELECTOR_PAD, GstSelectorPad))
132 #define GST_SELECTOR_PAD_CLASS(klass) \
133 (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_SELECTOR_PAD, GstSelectorPadClass))
134 #define GST_IS_SELECTOR_PAD(obj) \
135 (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_SELECTOR_PAD))
136 #define GST_IS_SELECTOR_PAD_CLASS(klass) \
137 (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_SELECTOR_PAD))
138 #define GST_SELECTOR_PAD_CAST(obj) \
139 ((GstSelectorPad *)(obj))
141 typedef struct _GstSelectorPad GstSelectorPad;
142 typedef struct _GstSelectorPadClass GstSelectorPadClass;
143 typedef struct _GstSelectorPadCachedBuffer GstSelectorPadCachedBuffer;
145 struct _GstSelectorPad
149 gboolean pushed; /* when buffer was pushed downstream since activation */
150 guint group_id; /* Group ID from the last stream-start */
151 gboolean group_done; /* when Stream Group Done has been
153 gboolean eos; /* when EOS has been received */
154 gboolean eos_sent; /* when EOS was sent downstream */
155 gboolean discont; /* after switching we create a discont */
156 gboolean flushing; /* set after flush-start and before flush-stop */
158 GstTagList *tags; /* last tags received on the pad */
160 GstSegment segment; /* the current segment on the pad */
161 guint32 segment_seqnum; /* sequence number of the current segment */
163 gboolean events_pending; /* TRUE if sticky events need to be updated */
165 gboolean sending_cached_buffers;
166 GQueue *cached_buffers;
169 struct _GstSelectorPadCachedBuffer
175 struct _GstSelectorPadClass
180 GType gst_selector_pad_get_type (void);
181 static void gst_selector_pad_finalize (GObject * object);
182 static void gst_selector_pad_get_property (GObject * object,
183 guint prop_id, GValue * value, GParamSpec * pspec);
184 static void gst_selector_pad_set_property (GObject * object,
185 guint prop_id, const GValue * value, GParamSpec * pspec);
187 static gint64 gst_selector_pad_get_running_time (GstSelectorPad * pad);
188 static void gst_selector_pad_reset (GstSelectorPad * pad);
189 static gboolean gst_selector_pad_event (GstPad * pad, GstObject * parent,
191 static gboolean gst_selector_pad_query (GstPad * pad, GstObject * parent,
193 static GstIterator *gst_selector_pad_iterate_linked_pads (GstPad * pad,
195 static GstFlowReturn gst_selector_pad_chain (GstPad * pad, GstObject * parent,
197 static void gst_selector_pad_cache_buffer (GstSelectorPad * selpad,
199 static void gst_selector_pad_free_cached_buffers (GstSelectorPad * selpad);
201 G_DEFINE_TYPE (GstSelectorPad, gst_selector_pad, GST_TYPE_PAD);
204 gst_selector_pad_class_init (GstSelectorPadClass * klass)
206 GObjectClass *gobject_class;
208 gobject_class = (GObjectClass *) klass;
210 gobject_class->finalize = gst_selector_pad_finalize;
212 gobject_class->get_property = gst_selector_pad_get_property;
213 gobject_class->set_property = gst_selector_pad_set_property;
215 g_object_class_install_property (gobject_class, PROP_PAD_RUNNING_TIME,
216 g_param_spec_int64 ("running-time", "Running time",
217 "Running time of stream on pad", 0, G_MAXINT64, 0,
218 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
219 g_object_class_install_property (gobject_class, PROP_PAD_TAGS,
220 g_param_spec_boxed ("tags", "Tags",
221 "The currently active tags on the pad", GST_TYPE_TAG_LIST,
222 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
223 g_object_class_install_property (gobject_class, PROP_PAD_ACTIVE,
224 g_param_spec_boolean ("active", "Active",
225 "If the pad is currently active", FALSE,
226 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
227 /* FIXME: better property name? */
228 g_object_class_install_property (gobject_class, PROP_PAD_ALWAYS_OK,
229 g_param_spec_boolean ("always-ok", "Always OK",
230 "Make an inactive pad return OK instead of NOT_LINKED",
231 DEFAULT_PAD_ALWAYS_OK, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
235 gst_selector_pad_init (GstSelectorPad * pad)
237 pad->always_ok = DEFAULT_PAD_ALWAYS_OK;
238 gst_selector_pad_reset (pad);
242 gst_selector_pad_finalize (GObject * object)
246 pad = GST_SELECTOR_PAD_CAST (object);
249 gst_tag_list_unref (pad->tags);
250 gst_selector_pad_free_cached_buffers (pad);
252 G_OBJECT_CLASS (gst_selector_pad_parent_class)->finalize (object);
256 gst_selector_pad_set_property (GObject * object, guint prop_id,
257 const GValue * value, GParamSpec * pspec)
259 GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
262 case PROP_PAD_ALWAYS_OK:
263 GST_OBJECT_LOCK (object);
264 spad->always_ok = g_value_get_boolean (value);
265 GST_OBJECT_UNLOCK (object);
268 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
274 gst_selector_pad_get_property (GObject * object, guint prop_id,
275 GValue * value, GParamSpec * pspec)
277 GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
280 case PROP_PAD_RUNNING_TIME:
281 g_value_set_int64 (value, gst_selector_pad_get_running_time (spad));
284 GST_OBJECT_LOCK (object);
285 g_value_set_boxed (value, spad->tags);
286 GST_OBJECT_UNLOCK (object);
288 case PROP_PAD_ACTIVE:
290 GstInputSelector *sel;
292 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (spad));
294 g_value_set_boolean (value, gst_input_selector_is_active_sinkpad (sel,
295 GST_PAD_CAST (spad)));
296 gst_object_unref (sel);
298 g_value_set_boolean (value, FALSE);
302 case PROP_PAD_ALWAYS_OK:
303 GST_OBJECT_LOCK (object);
304 g_value_set_boolean (value, spad->always_ok);
305 GST_OBJECT_UNLOCK (object);
308 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
314 gst_selector_pad_get_running_time (GstSelectorPad * pad)
318 GST_OBJECT_LOCK (pad);
319 if (pad->segment.format == GST_FORMAT_TIME) {
321 gst_segment_to_running_time (&pad->segment, pad->segment.format,
322 pad->segment.position);
324 GST_OBJECT_UNLOCK (pad);
326 GST_DEBUG_OBJECT (pad, "running time: %" GST_TIME_FORMAT
327 " segment: %" GST_SEGMENT_FORMAT, GST_TIME_ARGS (ret), &pad->segment);
332 /* must be called with the SELECTOR_LOCK */
334 gst_selector_pad_reset (GstSelectorPad * pad)
336 GST_OBJECT_LOCK (pad);
338 pad->group_done = FALSE;
340 pad->eos_sent = FALSE;
341 pad->events_pending = FALSE;
342 pad->discont = FALSE;
343 pad->flushing = FALSE;
344 gst_segment_init (&pad->segment, GST_FORMAT_UNDEFINED);
345 pad->sending_cached_buffers = FALSE;
346 gst_selector_pad_free_cached_buffers (pad);
347 GST_OBJECT_UNLOCK (pad);
350 static GstSelectorPadCachedBuffer *
351 gst_selector_pad_new_cached_buffer (GstSelectorPad * selpad, GstBuffer * buffer)
353 GstSelectorPadCachedBuffer *cached_buffer =
354 g_slice_new (GstSelectorPadCachedBuffer);
355 cached_buffer->buffer = buffer;
356 cached_buffer->segment = selpad->segment;
357 return cached_buffer;
361 gst_selector_pad_free_cached_buffer (GstSelectorPadCachedBuffer * cached_buffer)
363 if (cached_buffer->buffer)
364 gst_buffer_unref (cached_buffer->buffer);
365 g_slice_free (GstSelectorPadCachedBuffer, cached_buffer);
368 /* must be called with the SELECTOR_LOCK */
370 gst_selector_pad_cache_buffer (GstSelectorPad * selpad, GstBuffer * buffer)
372 if (selpad->segment.format != GST_FORMAT_TIME) {
373 GST_DEBUG_OBJECT (selpad, "Buffer %p with segment not in time format, "
374 "not caching", buffer);
375 gst_buffer_unref (buffer);
379 GST_DEBUG_OBJECT (selpad, "Caching buffer %p", buffer);
380 if (!selpad->cached_buffers)
381 selpad->cached_buffers = g_queue_new ();
382 g_queue_push_tail (selpad->cached_buffers,
383 gst_selector_pad_new_cached_buffer (selpad, buffer));
386 /* must be called with the SELECTOR_LOCK */
388 gst_selector_pad_free_cached_buffers (GstSelectorPad * selpad)
390 if (!selpad->cached_buffers)
393 GST_DEBUG_OBJECT (selpad, "Freeing cached buffers");
394 g_queue_free_full (selpad->cached_buffers,
395 (GDestroyNotify) gst_selector_pad_free_cached_buffer);
396 selpad->cached_buffers = NULL;
399 /* strictly get the linked pad from the sinkpad. If the pad is active we return
400 * the srcpad else we return NULL */
402 gst_selector_pad_iterate_linked_pads (GstPad * pad, GstObject * parent)
404 GstInputSelector *sel;
406 GstIterator *it = NULL;
409 sel = GST_INPUT_SELECTOR (parent);
411 otherpad = gst_input_selector_get_linked_pad (sel, pad, TRUE);
413 g_value_init (&val, GST_TYPE_PAD);
414 g_value_set_object (&val, otherpad);
415 it = gst_iterator_new_single (GST_TYPE_PAD, &val);
416 g_value_unset (&val);
417 gst_object_unref (otherpad);
424 forward_sticky_events (GstPad * sinkpad, GstEvent ** event, gpointer user_data)
426 GstInputSelector *sel = GST_INPUT_SELECTOR (user_data);
428 GST_DEBUG_OBJECT (sinkpad, "forward sticky event %" GST_PTR_FORMAT, *event);
430 if (GST_EVENT_TYPE (*event) == GST_EVENT_SEGMENT) {
431 GstSegment *seg = &GST_SELECTOR_PAD (sinkpad)->segment;
434 e = gst_event_new_segment (seg);
435 gst_event_set_seqnum (e, GST_SELECTOR_PAD_CAST (sinkpad)->segment_seqnum);
437 gst_pad_push_event (sel->srcpad, e);
438 } else if (GST_EVENT_TYPE (*event) == GST_EVENT_STREAM_START
439 && !sel->have_group_id) {
441 gst_pad_get_sticky_event (sel->srcpad, GST_EVENT_STREAM_START, 0);
443 /* Only push stream-start once if not all our streams have a stream-id */
445 gst_pad_push_event (sel->srcpad, gst_event_ref (*event));
447 gst_event_unref (tmp);
450 gst_pad_push_event (sel->srcpad, gst_event_ref (*event));
457 gst_input_selector_eos_wait (GstInputSelector * self, GstSelectorPad * pad,
458 GstEvent * eos_event)
460 while (!self->eos && !self->flushing && !pad->flushing) {
461 GstPad *active_sinkpad;
462 active_sinkpad = gst_input_selector_get_active_sinkpad (self);
463 if (pad == GST_SELECTOR_PAD_CAST (active_sinkpad) && pad->eos
465 GST_DEBUG_OBJECT (pad, "send EOS event");
466 GST_INPUT_SELECTOR_UNLOCK (self);
467 /* if we have a pending events, push them now */
468 if (pad->events_pending) {
469 gst_pad_sticky_events_foreach (GST_PAD_CAST (pad),
470 forward_sticky_events, self);
471 pad->events_pending = FALSE;
474 gst_pad_push_event (self->srcpad, gst_event_ref (eos_event));
475 GST_INPUT_SELECTOR_LOCK (self);
476 /* Wake up other pads so they can continue when syncing to
477 * running time, as this pad just switched to EOS and
478 * may enable others to progress */
479 GST_INPUT_SELECTOR_BROADCAST (self);
480 pad->eos_sent = TRUE;
482 /* we can be unlocked here when we are shutting down (flushing) or when we
484 GST_INPUT_SELECTOR_WAIT (self);
488 return self->flushing;
492 gst_input_selector_all_eos (GstInputSelector * sel)
496 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = walk->next) {
497 GstSelectorPad *selpad;
499 selpad = GST_SELECTOR_PAD_CAST (walk->data);
510 gst_selector_pad_event (GstPad * pad, GstObject * parent, GstEvent * event)
514 gboolean new_tags = FALSE;
515 GstInputSelector *sel;
516 GstSelectorPad *selpad;
517 GstPad *prev_active_sinkpad;
518 GstPad *active_sinkpad;
520 sel = GST_INPUT_SELECTOR (parent);
521 selpad = GST_SELECTOR_PAD_CAST (pad);
522 GST_DEBUG_OBJECT (selpad, "received event %" GST_PTR_FORMAT, event);
524 GST_INPUT_SELECTOR_LOCK (sel);
525 prev_active_sinkpad =
526 sel->active_sinkpad ? gst_object_ref (sel->active_sinkpad) : NULL;
527 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
528 gst_object_ref (active_sinkpad);
529 GST_INPUT_SELECTOR_UNLOCK (sel);
531 if (prev_active_sinkpad != active_sinkpad) {
532 if (prev_active_sinkpad)
533 g_object_notify (G_OBJECT (prev_active_sinkpad), "active");
534 g_object_notify (G_OBJECT (active_sinkpad), "active");
535 g_object_notify (G_OBJECT (sel), "active-pad");
537 if (prev_active_sinkpad)
538 gst_object_unref (prev_active_sinkpad);
539 gst_object_unref (active_sinkpad);
541 GST_INPUT_SELECTOR_LOCK (sel);
542 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
544 /* only forward if we are dealing with the active sinkpad */
545 forward = (pad == active_sinkpad);
547 switch (GST_EVENT_TYPE (event)) {
548 case GST_EVENT_STREAM_START:{
549 if (!gst_event_parse_group_id (event, &selpad->group_id)) {
550 sel->have_group_id = FALSE;
551 selpad->group_id = 0;
555 case GST_EVENT_FLUSH_START:
556 /* Unblock the pad if it's waiting */
557 selpad->flushing = TRUE;
559 selpad->group_done = FALSE;
560 GST_INPUT_SELECTOR_BROADCAST (sel);
562 case GST_EVENT_FLUSH_STOP:
563 gst_selector_pad_reset (selpad);
565 case GST_EVENT_SEGMENT:
567 gst_event_copy_segment (event, &selpad->segment);
568 selpad->segment_seqnum = gst_event_get_seqnum (event);
570 GST_DEBUG_OBJECT (pad, "configured SEGMENT %" GST_SEGMENT_FORMAT,
576 GstTagList *tags, *oldtags, *newtags;
578 gst_event_parse_tag (event, &tags);
580 GST_OBJECT_LOCK (selpad);
581 oldtags = selpad->tags;
583 newtags = gst_tag_list_merge (oldtags, tags, GST_TAG_MERGE_REPLACE);
584 selpad->tags = newtags;
585 GST_OBJECT_UNLOCK (selpad);
588 gst_tag_list_unref (oldtags);
589 GST_DEBUG_OBJECT (pad, "received tags %" GST_PTR_FORMAT, newtags);
596 GST_DEBUG_OBJECT (pad, "received EOS");
597 if (gst_input_selector_all_eos (sel)) {
598 GST_DEBUG_OBJECT (pad, "All sink pad received EOS");
600 GST_INPUT_SELECTOR_BROADCAST (sel);
602 gst_input_selector_eos_wait (sel, selpad, event);
607 GstClockTime ts, dur;
609 GST_DEBUG_OBJECT (pad, "Received gap event: %" GST_PTR_FORMAT, event);
611 gst_event_parse_gap (event, &ts, &dur);
612 if (GST_CLOCK_TIME_IS_VALID (ts)) {
613 if (GST_CLOCK_TIME_IS_VALID (dur))
616 /* update the segment position */
617 GST_OBJECT_LOCK (pad);
618 selpad->segment.position = ts;
619 GST_OBJECT_UNLOCK (pad);
620 if (sel->sync_streams && active_sinkpad == pad)
621 GST_INPUT_SELECTOR_BROADCAST (sel);
626 case GST_EVENT_STREAM_GROUP_DONE:{
627 GST_DEBUG_OBJECT (sel, "Stream group-done in inputselector pad %s",
628 GST_OBJECT_NAME (selpad));
629 gst_event_parse_stream_group_done (event, &selpad->group_id);
630 selpad->group_done = TRUE;
631 if (sel->sync_streams && active_sinkpad == pad)
632 GST_INPUT_SELECTOR_BROADCAST (sel);
638 GST_INPUT_SELECTOR_UNLOCK (sel);
640 g_object_notify (G_OBJECT (selpad), "tags");
642 GST_DEBUG_OBJECT (pad, "forwarding event");
643 res = gst_pad_push_event (sel->srcpad, event);
645 /* If we aren't forwarding the event because the pad is not the
646 * active_sinkpad, then set the flag on the pad
647 * that says a segment needs sending if/when that pad is activated.
648 * For all other cases, we send the event immediately, which makes
649 * sparse streams and other segment updates work correctly downstream.
651 if (GST_EVENT_IS_STICKY (event))
652 selpad->events_pending = TRUE;
653 gst_event_unref (event);
660 gst_selector_pad_query (GstPad * pad, GstObject * parent, GstQuery * query)
662 gboolean res = FALSE;
663 GstInputSelector *self = (GstInputSelector *) parent;
665 switch (GST_QUERY_TYPE (query)) {
667 case GST_QUERY_POSITION:
668 case GST_QUERY_DURATION:
669 /* always proxy caps/position/duration query, regardless of active pad or not
670 * See https://bugzilla.gnome.org/show_bug.cgi?id=775445 */
671 res = gst_pad_peer_query (self->srcpad, query);
673 case GST_QUERY_ALLOCATION:{
674 GstPad *active_sinkpad;
675 GstInputSelector *sel = GST_INPUT_SELECTOR (parent);
677 /* Only do the allocation query for the active sinkpad,
678 * after switching a reconfigure event is sent and upstream
679 * should reconfigure and do a new allocation query
681 if (GST_PAD_DIRECTION (pad) == GST_PAD_SINK) {
682 GST_INPUT_SELECTOR_LOCK (sel);
683 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
684 GST_INPUT_SELECTOR_UNLOCK (sel);
686 if (pad != active_sinkpad) {
694 res = gst_pad_query_default (pad, parent, query);
703 gst_input_selector_get_clipped_running_time (GstSegment * seg, GstBuffer * buf)
705 GstClockTime running_time;
707 running_time = GST_BUFFER_PTS (buf);
708 /* If possible try to get the running time at the end of the buffer */
709 if (GST_BUFFER_DURATION_IS_VALID (buf))
710 running_time += GST_BUFFER_DURATION (buf);
711 /* Only use the segment to convert to running time if the segment is
712 * in TIME format, otherwise do our best to try to sync */
713 if (GST_CLOCK_TIME_IS_VALID (seg->stop)) {
714 if (running_time > seg->stop) {
715 running_time = seg->stop;
718 return gst_segment_to_running_time (seg, GST_FORMAT_TIME, running_time);
721 /* must be called without the SELECTOR_LOCK, will wait until the running time
722 * of the active pad is after this pad or return TRUE when flushing */
724 gst_input_selector_wait_running_time (GstInputSelector * sel,
725 GstSelectorPad * selpad, GstBuffer * buf)
729 GST_DEBUG_OBJECT (selpad, "entering wait for buffer %p", buf);
731 /* If we have no valid timestamp we can't sync this buffer */
732 if (!GST_BUFFER_PTS_IS_VALID (buf)) {
733 GST_DEBUG_OBJECT (selpad, "leaving wait for buffer with "
734 "invalid timestamp");
738 seg = &selpad->segment;
741 * a) this is the active pad
742 * b) the pad or the selector is flushing
743 * c) the buffer running time is before the current running time
744 * (either active-seg or clock, depending on sync-mode)
747 GST_INPUT_SELECTOR_LOCK (sel);
749 GstPad *active_sinkpad;
750 GstSelectorPad *active_selpad;
752 gint64 cur_running_time;
753 GstClockTime running_time;
755 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
756 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
758 if (seg->format != GST_FORMAT_TIME) {
759 GST_DEBUG_OBJECT (selpad,
760 "Not waiting because we don't have a TIME segment");
761 GST_INPUT_SELECTOR_UNLOCK (sel);
765 running_time = gst_input_selector_get_clipped_running_time (seg, buf);
766 /* If this is outside the segment don't sync */
767 if (running_time == -1) {
768 GST_DEBUG_OBJECT (selpad,
769 "Not waiting because buffer is outside segment");
770 GST_INPUT_SELECTOR_UNLOCK (sel);
774 cur_running_time = GST_CLOCK_TIME_NONE;
775 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
776 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
778 GstClockTime base_time;
780 cur_running_time = gst_clock_get_time (clock);
781 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
782 if (base_time <= cur_running_time)
783 cur_running_time -= base_time;
785 cur_running_time = 0;
787 gst_object_unref (clock);
790 GstSegment *active_seg;
792 active_seg = &active_selpad->segment;
794 /* If the active segment is configured but not to time format
795 * we can't do any syncing at all */
796 if ((active_seg->format != GST_FORMAT_TIME
797 && active_seg->format != GST_FORMAT_UNDEFINED)) {
798 GST_DEBUG_OBJECT (selpad,
799 "Not waiting because active segment isn't in TIME format");
800 GST_INPUT_SELECTOR_UNLOCK (sel);
804 /* Get active pad's running time, if no configured segment yet keep at -1 */
805 if (active_seg->format == GST_FORMAT_TIME)
806 cur_running_time = gst_segment_to_running_time (active_seg,
807 GST_FORMAT_TIME, active_seg->position);
810 /* Don't wait if the group is finished on the active pad,
811 * as the running time won't progress now */
812 if (selpad != active_selpad && active_selpad->group_done &&
813 selpad->group_id == active_selpad->group_id) {
814 GST_DEBUG_OBJECT (selpad, "Active pad received group-done. Unblocking");
815 GST_INPUT_SELECTOR_UNLOCK (sel);
819 if (selpad != active_selpad && !sel->eos && !sel->flushing
820 && !selpad->flushing && (cur_running_time == GST_CLOCK_TIME_NONE
821 || running_time >= cur_running_time)) {
822 GST_DEBUG_OBJECT (selpad,
823 "Waiting for active streams to advance. %" GST_TIME_FORMAT " >= %"
824 GST_TIME_FORMAT, GST_TIME_ARGS (running_time),
825 GST_TIME_ARGS (cur_running_time));
826 GST_INPUT_SELECTOR_WAIT (sel);
828 GST_INPUT_SELECTOR_UNLOCK (sel);
833 /* Return TRUE if the selector or the pad is flushing */
834 return (sel->flushing || selpad->flushing);
837 #if DEBUG_CACHED_BUFFERS
839 gst_input_selector_debug_cached_buffers (GstInputSelector * sel)
843 if (gst_debug_category_get_threshold (input_selector_debug) < GST_LEVEL_DEBUG)
846 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = walk->next) {
847 GstSelectorPad *selpad;
851 selpad = GST_SELECTOR_PAD_CAST (walk->data);
852 if (!selpad->cached_buffers) {
853 GST_DEBUG_OBJECT (selpad, "Cached buffers timestamps: <none>");
857 timestamps = g_string_new ("Cached buffers timestamps:");
858 for (l = selpad->cached_buffers->head; l != NULL; l = l->next) {
859 GstSelectorPadCachedBuffer *cached_buffer = l->data;
861 g_string_append_printf (timestamps, " %" GST_TIME_FORMAT,
862 GST_TIME_ARGS (GST_BUFFER_PTS (cached_buffer->buffer)));
864 GST_DEBUG_OBJECT (selpad, "%s", timestamps->str);
865 g_string_free (timestamps, TRUE);
870 /* must be called with the SELECTOR_LOCK */
872 gst_input_selector_cleanup_old_cached_buffers (GstInputSelector * sel,
876 gint64 cur_running_time;
879 cur_running_time = GST_CLOCK_TIME_NONE;
880 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
881 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
883 GstClockTime base_time;
885 cur_running_time = gst_clock_get_time (clock);
886 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
887 if (base_time <= cur_running_time)
888 cur_running_time -= base_time;
890 cur_running_time = 0;
892 gst_object_unref (clock);
895 GstPad *active_sinkpad;
896 GstSelectorPad *active_selpad;
897 GstSegment *active_seg;
899 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
900 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
901 active_seg = &active_selpad->segment;
903 /* Get active pad's running time, if no configured segment yet keep at -1 */
904 if (active_seg->format == GST_FORMAT_TIME)
905 cur_running_time = gst_segment_to_running_time (active_seg,
906 GST_FORMAT_TIME, active_seg->position);
909 if (!GST_CLOCK_TIME_IS_VALID (cur_running_time))
912 GST_DEBUG_OBJECT (sel, "Cleaning up old cached buffers");
913 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
914 GstSelectorPad *selpad;
916 GstSelectorPadCachedBuffer *cached_buffer;
917 GSList *maybe_remove;
918 guint queue_position;
920 selpad = GST_SELECTOR_PAD_CAST (walk->data);
921 if (!selpad->cached_buffers)
924 seg = &selpad->segment;
928 while ((cached_buffer = g_queue_peek_nth (selpad->cached_buffers,
930 GstBuffer *buffer = cached_buffer->buffer;
931 GstClockTime running_time;
934 /* If we have no valid timestamp we can't sync this buffer */
935 if (!GST_BUFFER_PTS_IS_VALID (buffer)) {
936 maybe_remove = g_slist_append (maybe_remove, cached_buffer);
937 queue_position = g_slist_length (maybe_remove);
941 /* the buffer is still valid if its duration is valid and the
942 * timestamp + duration is >= time, or if its duration is invalid
943 * and the timestamp is >= time */
944 running_time = gst_input_selector_get_clipped_running_time (seg, buffer);
945 GST_DEBUG_OBJECT (selpad,
946 "checking if buffer %p running time=%" GST_TIME_FORMAT
947 " >= stream time=%" GST_TIME_FORMAT, buffer,
948 GST_TIME_ARGS (running_time), GST_TIME_ARGS (cur_running_time));
949 if (running_time >= cur_running_time) {
953 GST_DEBUG_OBJECT (selpad, "Removing old cached buffer %p", buffer);
954 g_queue_pop_nth (selpad->cached_buffers, queue_position);
955 gst_selector_pad_free_cached_buffer (cached_buffer);
957 for (l = maybe_remove; l != NULL; l = g_slist_next (l)) {
958 /* A buffer after some invalid buffers was removed, it means the invalid buffers
959 * are old, lets also remove them */
960 cached_buffer = l->data;
961 g_queue_remove (selpad->cached_buffers, cached_buffer);
962 gst_selector_pad_free_cached_buffer (cached_buffer);
965 g_slist_free (maybe_remove);
970 g_slist_free (maybe_remove);
973 if (g_queue_is_empty (selpad->cached_buffers)) {
974 g_queue_free (selpad->cached_buffers);
975 selpad->cached_buffers = NULL;
979 #if DEBUG_CACHED_BUFFERS
980 gst_input_selector_debug_cached_buffers (sel);
985 gst_selector_pad_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
987 GstInputSelector *sel;
989 GstPad *active_sinkpad;
990 GstPad *prev_active_sinkpad = NULL;
991 GstSelectorPad *selpad;
993 sel = GST_INPUT_SELECTOR (parent);
994 selpad = GST_SELECTOR_PAD_CAST (pad);
996 GST_DEBUG_OBJECT (selpad,
997 "entering chain for buf %p with timestamp %" GST_TIME_FORMAT, buf,
998 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
1000 GST_INPUT_SELECTOR_LOCK (sel);
1002 if (sel->flushing) {
1003 GST_INPUT_SELECTOR_UNLOCK (sel);
1007 GST_LOG_OBJECT (pad, "getting active pad");
1009 prev_active_sinkpad =
1010 sel->active_sinkpad ? gst_object_ref (sel->active_sinkpad) : NULL;
1011 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1013 /* In sync mode wait until the active pad has advanced
1014 * after the running time of the current buffer */
1015 if (sel->sync_streams) {
1016 /* call chain for each cached buffer if we are not the active pad
1017 * or if we are the active pad but didn't push anything yet. */
1018 if (active_sinkpad != pad || !selpad->pushed) {
1019 /* no need to check for sel->cache_buffers as selpad->cached_buffers
1020 * will only be valid if cache_buffers is TRUE */
1021 if (selpad->cached_buffers && !selpad->sending_cached_buffers) {
1022 GstSelectorPadCachedBuffer *cached_buffer;
1023 GstSegment saved_segment;
1025 saved_segment = selpad->segment;
1027 selpad->sending_cached_buffers = TRUE;
1028 while (!sel->eos && !sel->flushing && !selpad->flushing &&
1029 (cached_buffer = g_queue_pop_head (selpad->cached_buffers))) {
1030 GST_DEBUG_OBJECT (pad, "Cached buffers found, "
1031 "invoking chain for cached buffer %p", cached_buffer->buffer);
1033 selpad->segment = cached_buffer->segment;
1034 selpad->events_pending = TRUE;
1035 GST_INPUT_SELECTOR_UNLOCK (sel);
1036 gst_selector_pad_chain (pad, parent, cached_buffer->buffer);
1037 GST_INPUT_SELECTOR_LOCK (sel);
1039 /* We just passed the ownership of the buffer to the chain function */
1040 cached_buffer->buffer = NULL;
1041 gst_selector_pad_free_cached_buffer (cached_buffer);
1043 /* we may have cleaned up the queue in the meantime because of
1045 if (!selpad->cached_buffers) {
1049 selpad->sending_cached_buffers = FALSE;
1051 /* all cached buffers sent, restore segment for current buffer */
1052 selpad->segment = saved_segment;
1053 selpad->events_pending = TRUE;
1055 /* Might have changed while calling chain for cached buffers */
1056 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1060 if (active_sinkpad != pad) {
1061 GST_INPUT_SELECTOR_UNLOCK (sel);
1062 if (gst_input_selector_wait_running_time (sel, selpad, buf))
1064 GST_INPUT_SELECTOR_LOCK (sel);
1067 /* Might have changed while waiting */
1068 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1071 /* update the segment on the srcpad */
1072 if (GST_BUFFER_PTS_IS_VALID (buf)) {
1073 GstClockTime start_time = GST_BUFFER_PTS (buf);
1075 GST_LOG_OBJECT (pad, "received start time %" GST_TIME_FORMAT,
1076 GST_TIME_ARGS (start_time));
1077 if (GST_BUFFER_DURATION_IS_VALID (buf))
1078 GST_LOG_OBJECT (pad, "received end time %" GST_TIME_FORMAT,
1079 GST_TIME_ARGS (start_time + GST_BUFFER_DURATION (buf)));
1081 GST_OBJECT_LOCK (pad);
1082 selpad->segment.position = start_time;
1083 GST_OBJECT_UNLOCK (pad);
1086 /* Ignore buffers from pads except the selected one */
1087 if (pad != active_sinkpad)
1090 /* Tell all non-active pads that we advanced the running time */
1091 if (sel->sync_streams)
1092 GST_INPUT_SELECTOR_BROADCAST (sel);
1094 GST_INPUT_SELECTOR_UNLOCK (sel);
1096 if (prev_active_sinkpad != active_sinkpad) {
1097 if (prev_active_sinkpad)
1098 g_object_notify (G_OBJECT (prev_active_sinkpad), "active");
1099 g_object_notify (G_OBJECT (active_sinkpad), "active");
1100 g_object_notify (G_OBJECT (sel), "active-pad");
1103 /* if we have a pending events, push them now */
1104 if (G_UNLIKELY (prev_active_sinkpad != active_sinkpad
1105 || selpad->events_pending)) {
1106 gst_pad_sticky_events_foreach (GST_PAD_CAST (selpad), forward_sticky_events,
1108 selpad->events_pending = FALSE;
1111 if (prev_active_sinkpad) {
1112 gst_object_unref (prev_active_sinkpad);
1113 prev_active_sinkpad = NULL;
1116 if (selpad->discont) {
1117 buf = gst_buffer_make_writable (buf);
1119 GST_DEBUG_OBJECT (pad, "Marking discont buffer %p", buf);
1120 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
1121 selpad->discont = FALSE;
1125 GST_LOG_OBJECT (pad, "Forwarding buffer %p with timestamp %" GST_TIME_FORMAT,
1126 buf, GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
1128 /* Only make the buffer read-only when necessary */
1129 if (sel->sync_streams && sel->cache_buffers)
1130 buf = gst_buffer_ref (buf);
1131 res = gst_pad_push (sel->srcpad, buf);
1132 GST_LOG_OBJECT (pad, "Buffer %p forwarded result=%d", buf, res);
1134 GST_INPUT_SELECTOR_LOCK (sel);
1136 if (sel->sync_streams && sel->cache_buffers) {
1137 /* Might have changed while pushing */
1138 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1139 /* only set pad to pushed if we are still the active pad */
1140 if (active_sinkpad == pad)
1141 selpad->pushed = TRUE;
1143 /* cache buffer as we may need it again if we change pads */
1144 gst_selector_pad_cache_buffer (selpad, buf);
1145 gst_input_selector_cleanup_old_cached_buffers (sel, pad);
1147 selpad->pushed = TRUE;
1149 GST_INPUT_SELECTOR_UNLOCK (sel);
1153 if (prev_active_sinkpad)
1154 gst_object_unref (prev_active_sinkpad);
1155 prev_active_sinkpad = NULL;
1159 /* dropped buffers */
1162 gboolean active_pad_pushed = GST_SELECTOR_PAD_CAST (active_sinkpad)->pushed;
1164 GST_DEBUG_OBJECT (pad, "Pad not active, discard buffer %p", buf);
1165 /* when we drop a buffer, we're creating a discont on this pad */
1166 selpad->discont = TRUE;
1167 GST_INPUT_SELECTOR_UNLOCK (sel);
1168 gst_buffer_unref (buf);
1170 /* figure out what to return upstream */
1171 GST_OBJECT_LOCK (selpad);
1172 if (selpad->always_ok || !active_pad_pushed)
1175 res = GST_FLOW_NOT_LINKED;
1176 GST_OBJECT_UNLOCK (selpad);
1182 GST_DEBUG_OBJECT (pad, "We are flushing, discard buffer %p", buf);
1183 gst_buffer_unref (buf);
1184 res = GST_FLOW_FLUSHING;
1189 static void gst_input_selector_dispose (GObject * object);
1190 static void gst_input_selector_finalize (GObject * object);
1192 static void gst_input_selector_set_property (GObject * object,
1193 guint prop_id, const GValue * value, GParamSpec * pspec);
1194 static void gst_input_selector_get_property (GObject * object,
1195 guint prop_id, GValue * value, GParamSpec * pspec);
1197 static GstPad *gst_input_selector_request_new_pad (GstElement * element,
1198 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps);
1199 static void gst_input_selector_release_pad (GstElement * element, GstPad * pad);
1201 static GstStateChangeReturn gst_input_selector_change_state (GstElement *
1202 element, GstStateChange transition);
1204 static gboolean gst_input_selector_event (GstPad * pad, GstObject * parent,
1208 GST_DEBUG_CATEGORY_INIT (input_selector_debug, \
1209 "input-selector", 0, "An input stream selector element");
1210 #define gst_input_selector_parent_class parent_class
1211 G_DEFINE_TYPE_WITH_CODE (GstInputSelector, gst_input_selector, GST_TYPE_ELEMENT,
1215 gst_input_selector_class_init (GstInputSelectorClass * klass)
1217 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
1218 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
1220 gobject_class->dispose = gst_input_selector_dispose;
1221 gobject_class->finalize = gst_input_selector_finalize;
1223 gobject_class->set_property = gst_input_selector_set_property;
1224 gobject_class->get_property = gst_input_selector_get_property;
1226 g_object_class_install_property (gobject_class, PROP_N_PADS,
1227 g_param_spec_uint ("n-pads", "Number of Pads",
1228 "The number of sink pads", 0, G_MAXUINT, 0,
1229 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
1231 g_object_class_install_property (gobject_class, PROP_ACTIVE_PAD,
1232 g_param_spec_object ("active-pad", "Active pad",
1233 "The currently active sink pad", GST_TYPE_PAD,
1234 G_PARAM_READWRITE | GST_PARAM_MUTABLE_PLAYING |
1235 G_PARAM_STATIC_STRINGS));
1238 * GstInputSelector:sync-streams
1240 * If set to %TRUE all inactive streams will be synced to the
1241 * running time of the active stream or to the current clock.
1243 * To make sure no buffers are dropped by input-selector
1244 * that might be needed when switching the active pad,
1245 * sync-mode should be set to "clock" and cache-buffers to TRUE.
1247 g_object_class_install_property (gobject_class, PROP_SYNC_STREAMS,
1248 g_param_spec_boolean ("sync-streams", "Sync Streams",
1249 "Synchronize inactive streams to the running time of the active "
1250 "stream or to the current clock",
1251 DEFAULT_SYNC_STREAMS,
1252 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1253 GST_PARAM_MUTABLE_READY));
1256 * GstInputSelector:sync-mode
1258 * Select how input-selector will sync buffers when in sync-streams mode.
1260 * Note that when using the "active-segment" mode, the "active-segment" may
1261 * be ahead of current clock time when switching the active pad, as the current
1262 * active pad may have pushed more buffers than what was displayed/consumed,
1263 * which may cause delays and some missing buffers.
1265 g_object_class_install_property (gobject_class, PROP_SYNC_MODE,
1266 g_param_spec_enum ("sync-mode", "Sync mode",
1267 "Behavior in sync-streams mode", GST_TYPE_INPUT_SELECTOR_SYNC_MODE,
1269 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1270 GST_PARAM_MUTABLE_READY));
1273 * GstInputSelector:cache-buffers
1275 * If set to %TRUE and GstInputSelector:sync-streams is also set to %TRUE,
1276 * the active pad will cache the buffers still considered valid (after current
1277 * running time, see sync-mode) to avoid missing frames if/when the pad is
1280 * The active pad may push more buffers than what is currently displayed/consumed
1281 * and when changing pads those buffers will be discarded and the only way to
1282 * reactivate that pad without loosing the already consumed buffers is to enable cache.
1284 g_object_class_install_property (gobject_class, PROP_CACHE_BUFFERS,
1285 g_param_spec_boolean ("cache-buffers", "Cache Buffers",
1286 "Cache buffers for active-pad",
1287 DEFAULT_CACHE_BUFFERS,
1288 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1289 GST_PARAM_MUTABLE_READY));
1291 gst_element_class_set_static_metadata (gstelement_class, "Input selector",
1292 "Generic", "N-to-1 input stream selector",
1293 "Julien Moutte <julien@moutte.net>, "
1294 "Jan Schmidt <thaytan@mad.scientist.com>, "
1295 "Wim Taymans <wim.taymans@gmail.com>");
1296 gst_element_class_add_static_pad_template_with_gtype (gstelement_class,
1297 &gst_input_selector_sink_factory, GST_TYPE_SELECTOR_PAD);
1298 gst_element_class_add_static_pad_template (gstelement_class,
1299 &gst_input_selector_src_factory);
1301 gstelement_class->request_new_pad = gst_input_selector_request_new_pad;
1302 gstelement_class->release_pad = gst_input_selector_release_pad;
1303 gstelement_class->change_state = gst_input_selector_change_state;
1307 gst_input_selector_init (GstInputSelector * sel)
1309 sel->srcpad = gst_pad_new ("src", GST_PAD_SRC);
1310 gst_pad_set_iterate_internal_links_function (sel->srcpad,
1311 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1312 gst_pad_set_event_function (sel->srcpad,
1313 GST_DEBUG_FUNCPTR (gst_input_selector_event));
1314 GST_OBJECT_FLAG_SET (sel->srcpad, GST_PAD_FLAG_PROXY_CAPS);
1315 gst_element_add_pad (GST_ELEMENT (sel), sel->srcpad);
1316 /* sinkpad management */
1317 sel->active_sinkpad = NULL;
1319 sel->sync_streams = DEFAULT_SYNC_STREAMS;
1320 sel->sync_mode = DEFAULT_SYNC_MODE;
1321 sel->have_group_id = TRUE;
1323 g_mutex_init (&sel->lock);
1324 g_cond_init (&sel->cond);
1327 /* lets give a change for downstream to do something on
1328 * active-pad change before we start pushing new buffers */
1329 g_signal_connect_data (sel, "notify::active-pad",
1330 (GCallback) gst_input_selector_active_pad_changed, NULL,
1331 NULL, G_CONNECT_AFTER);
1335 gst_input_selector_dispose (GObject * object)
1337 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1339 if (sel->active_sinkpad) {
1340 gst_object_unref (sel->active_sinkpad);
1341 sel->active_sinkpad = NULL;
1343 G_OBJECT_CLASS (parent_class)->dispose (object);
1347 gst_input_selector_finalize (GObject * object)
1349 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1351 g_mutex_clear (&sel->lock);
1352 g_cond_clear (&sel->cond);
1354 G_OBJECT_CLASS (parent_class)->finalize (object);
1357 /* this function must be called with the SELECTOR_LOCK. It returns TRUE when the
1358 * active pad changed. */
1360 gst_input_selector_set_active_pad (GstInputSelector * self, GstPad * pad)
1362 GstSelectorPad *old, *new;
1363 GstPad **active_pad_p;
1365 if (pad == self->active_sinkpad)
1368 /* guard against users setting a src pad or foreign pad as active pad */
1370 g_return_val_if_fail (GST_PAD_IS_SINK (pad), FALSE);
1371 g_return_val_if_fail (GST_IS_SELECTOR_PAD (pad), FALSE);
1372 g_return_val_if_fail (GST_PAD_PARENT (pad) == GST_ELEMENT_CAST (self),
1376 old = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
1377 new = GST_SELECTOR_PAD_CAST (pad);
1379 GST_DEBUG_OBJECT (self, "setting active pad to %s:%s",
1380 GST_DEBUG_PAD_NAME (new));
1383 old->pushed = FALSE;
1385 new->pushed = FALSE;
1387 /* Send a new SEGMENT event on the new pad next */
1388 if (old != new && new)
1389 new->events_pending = TRUE;
1391 active_pad_p = &self->active_sinkpad;
1392 gst_object_replace ((GstObject **) active_pad_p, GST_OBJECT_CAST (pad));
1394 if (old && old != new)
1395 gst_pad_push_event (GST_PAD_CAST (old), gst_event_new_reconfigure ());
1397 gst_pad_push_event (GST_PAD_CAST (new), gst_event_new_reconfigure ());
1399 GST_DEBUG_OBJECT (self, "New active pad is %" GST_PTR_FORMAT,
1400 self->active_sinkpad);
1402 if (old != new && new && new->eos) {
1403 new->eos_sent = FALSE;
1404 GST_INPUT_SELECTOR_BROADCAST (self);
1411 gst_input_selector_set_property (GObject * object, guint prop_id,
1412 const GValue * value, GParamSpec * pspec)
1414 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1417 case PROP_ACTIVE_PAD:
1421 pad = g_value_get_object (value);
1423 GST_INPUT_SELECTOR_LOCK (sel);
1425 #if DEBUG_CACHED_BUFFERS
1426 gst_input_selector_debug_cached_buffers (sel);
1429 gst_input_selector_set_active_pad (sel, pad);
1431 #if DEBUG_CACHED_BUFFERS
1432 gst_input_selector_debug_cached_buffers (sel);
1435 GST_INPUT_SELECTOR_UNLOCK (sel);
1438 case PROP_SYNC_STREAMS:
1439 GST_INPUT_SELECTOR_LOCK (sel);
1440 sel->sync_streams = g_value_get_boolean (value);
1441 GST_INPUT_SELECTOR_UNLOCK (sel);
1443 case PROP_SYNC_MODE:
1444 GST_INPUT_SELECTOR_LOCK (sel);
1445 sel->sync_mode = g_value_get_enum (value);
1446 GST_INPUT_SELECTOR_UNLOCK (sel);
1448 case PROP_CACHE_BUFFERS:
1449 GST_INPUT_SELECTOR_LOCK (object);
1450 sel->cache_buffers = g_value_get_boolean (value);
1451 GST_INPUT_SELECTOR_UNLOCK (object);
1454 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1460 gst_input_selector_active_pad_changed (GstInputSelector * sel,
1461 GParamSpec * pspec, gpointer user_data)
1463 /* Wake up all non-active pads in sync mode, they might be
1464 * the active pad now */
1465 if (sel->sync_streams)
1466 GST_INPUT_SELECTOR_BROADCAST (sel);
1470 gst_input_selector_get_property (GObject * object, guint prop_id,
1471 GValue * value, GParamSpec * pspec)
1473 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1477 GST_INPUT_SELECTOR_LOCK (object);
1478 g_value_set_uint (value, sel->n_pads);
1479 GST_INPUT_SELECTOR_UNLOCK (object);
1481 case PROP_ACTIVE_PAD:
1482 GST_INPUT_SELECTOR_LOCK (object);
1483 g_value_set_object (value, sel->active_sinkpad);
1484 GST_INPUT_SELECTOR_UNLOCK (object);
1486 case PROP_SYNC_STREAMS:
1487 GST_INPUT_SELECTOR_LOCK (object);
1488 g_value_set_boolean (value, sel->sync_streams);
1489 GST_INPUT_SELECTOR_UNLOCK (object);
1491 case PROP_SYNC_MODE:
1492 GST_INPUT_SELECTOR_LOCK (object);
1493 g_value_set_enum (value, sel->sync_mode);
1494 GST_INPUT_SELECTOR_UNLOCK (object);
1496 case PROP_CACHE_BUFFERS:
1497 GST_INPUT_SELECTOR_LOCK (object);
1498 g_value_set_boolean (value, sel->cache_buffers);
1499 GST_INPUT_SELECTOR_UNLOCK (object);
1502 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1508 gst_input_selector_get_linked_pad (GstInputSelector * sel, GstPad * pad,
1511 GstPad *otherpad = NULL;
1513 GST_INPUT_SELECTOR_LOCK (sel);
1514 if (pad == sel->srcpad)
1515 otherpad = sel->active_sinkpad;
1516 else if (pad == sel->active_sinkpad || !strict)
1517 otherpad = sel->srcpad;
1519 gst_object_ref (otherpad);
1520 GST_INPUT_SELECTOR_UNLOCK (sel);
1526 gst_input_selector_event (GstPad * pad, GstObject * parent, GstEvent * event)
1528 GstInputSelector *sel;
1529 gboolean result = FALSE;
1531 gboolean done = FALSE;
1532 GValue item = { 0, };
1534 GList *pushed_pads = NULL;
1536 sel = GST_INPUT_SELECTOR (parent);
1537 /* Send upstream events to all sinkpads */
1538 iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1540 /* This is now essentially a copy of gst_pad_event_default_dispatch
1541 * with a different iterator */
1543 switch (gst_iterator_next (iter, &item)) {
1544 case GST_ITERATOR_OK:
1545 eventpad = g_value_get_object (&item);
1547 /* if already pushed, skip */
1548 if (g_list_find (pushed_pads, eventpad)) {
1549 g_value_reset (&item);
1553 gst_event_ref (event);
1554 result |= gst_pad_push_event (eventpad, event);
1556 g_value_reset (&item);
1558 case GST_ITERATOR_RESYNC:
1559 /* We don't reset the result here because we don't push the event
1560 * again on pads that got the event already and because we need
1561 * to consider the result of the previous pushes */
1562 gst_iterator_resync (iter);
1564 case GST_ITERATOR_ERROR:
1565 GST_ERROR_OBJECT (pad, "Could not iterate over sinkpads");
1568 case GST_ITERATOR_DONE:
1573 g_value_unset (&item);
1574 gst_iterator_free (iter);
1576 g_list_free (pushed_pads);
1578 gst_event_unref (event);
1583 /* check if the pad is the active sinkpad */
1584 static inline gboolean
1585 gst_input_selector_is_active_sinkpad (GstInputSelector * sel, GstPad * pad)
1589 GST_INPUT_SELECTOR_LOCK (sel);
1590 res = (pad == sel->active_sinkpad);
1591 GST_INPUT_SELECTOR_UNLOCK (sel);
1596 /* Get or create the active sinkpad, must be called with SELECTOR_LOCK */
1598 gst_input_selector_get_active_sinkpad (GstInputSelector * sel)
1600 GstPad *active_sinkpad;
1602 active_sinkpad = sel->active_sinkpad;
1603 if (active_sinkpad == NULL) {
1604 GValue item = G_VALUE_INIT;
1605 GstIterator *iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1606 GstIteratorResult ires;
1608 while ((ires = gst_iterator_next (iter, &item)) == GST_ITERATOR_RESYNC)
1609 gst_iterator_resync (iter);
1610 if (ires == GST_ITERATOR_OK) {
1611 /* If no pad is currently selected, we return the first usable pad to
1612 * guarantee consistency */
1614 active_sinkpad = sel->active_sinkpad = g_value_dup_object (&item);
1615 g_value_reset (&item);
1616 GST_DEBUG_OBJECT (sel, "Activating pad %s:%s",
1617 GST_DEBUG_PAD_NAME (active_sinkpad));
1619 GST_WARNING_OBJECT (sel, "Couldn't find a default sink pad");
1620 gst_iterator_free (iter);
1623 return active_sinkpad;
1627 gst_input_selector_request_new_pad (GstElement * element,
1628 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps)
1630 GstInputSelector *sel;
1632 GstPad *sinkpad = NULL;
1634 g_return_val_if_fail (templ->direction == GST_PAD_SINK, NULL);
1636 sel = GST_INPUT_SELECTOR (element);
1638 GST_INPUT_SELECTOR_LOCK (sel);
1640 GST_LOG_OBJECT (sel, "Creating new pad sink_%u", sel->padcount);
1641 name = g_strdup_printf ("sink_%u", sel->padcount++);
1642 sinkpad = g_object_new (GST_TYPE_SELECTOR_PAD,
1643 "name", name, "direction", templ->direction, "template", templ, NULL);
1648 gst_pad_set_event_function (sinkpad,
1649 GST_DEBUG_FUNCPTR (gst_selector_pad_event));
1650 gst_pad_set_query_function (sinkpad,
1651 GST_DEBUG_FUNCPTR (gst_selector_pad_query));
1652 gst_pad_set_chain_function (sinkpad,
1653 GST_DEBUG_FUNCPTR (gst_selector_pad_chain));
1654 gst_pad_set_iterate_internal_links_function (sinkpad,
1655 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1657 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_CAPS);
1658 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_ALLOCATION);
1659 gst_pad_set_active (sinkpad, TRUE);
1660 gst_element_add_pad (GST_ELEMENT (sel), sinkpad);
1661 GST_INPUT_SELECTOR_UNLOCK (sel);
1667 gst_input_selector_release_pad (GstElement * element, GstPad * pad)
1669 GstInputSelector *sel;
1671 sel = GST_INPUT_SELECTOR (element);
1672 GST_LOG_OBJECT (sel, "Releasing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1674 GST_INPUT_SELECTOR_LOCK (sel);
1675 /* if the pad was the active pad, makes us select a new one */
1676 if (sel->active_sinkpad == pad) {
1677 GST_DEBUG_OBJECT (sel, "Deactivating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1678 gst_object_unref (sel->active_sinkpad);
1679 sel->active_sinkpad = NULL;
1682 GST_INPUT_SELECTOR_UNLOCK (sel);
1684 gst_pad_set_active (pad, FALSE);
1685 gst_element_remove_pad (GST_ELEMENT (sel), pad);
1689 gst_input_selector_reset (GstInputSelector * sel)
1693 GST_INPUT_SELECTOR_LOCK (sel);
1694 /* clear active pad */
1695 if (sel->active_sinkpad) {
1696 gst_object_unref (sel->active_sinkpad);
1697 sel->active_sinkpad = NULL;
1699 sel->eos_sent = FALSE;
1701 /* reset each of our sinkpads state */
1702 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
1703 GstSelectorPad *selpad = GST_SELECTOR_PAD_CAST (walk->data);
1705 gst_selector_pad_reset (selpad);
1708 gst_tag_list_unref (selpad->tags);
1709 selpad->tags = NULL;
1712 sel->have_group_id = TRUE;
1713 GST_INPUT_SELECTOR_UNLOCK (sel);
1716 static GstStateChangeReturn
1717 gst_input_selector_change_state (GstElement * element,
1718 GstStateChange transition)
1720 GstInputSelector *self = GST_INPUT_SELECTOR (element);
1721 GstStateChangeReturn result;
1723 switch (transition) {
1724 case GST_STATE_CHANGE_READY_TO_PAUSED:
1725 GST_INPUT_SELECTOR_LOCK (self);
1727 self->flushing = FALSE;
1728 GST_INPUT_SELECTOR_UNLOCK (self);
1730 case GST_STATE_CHANGE_PAUSED_TO_READY:
1731 /* first unlock before we call the parent state change function, which
1732 * tries to acquire the stream lock when going to ready. */
1733 GST_INPUT_SELECTOR_LOCK (self);
1735 self->flushing = TRUE;
1736 GST_INPUT_SELECTOR_BROADCAST (self);
1737 GST_INPUT_SELECTOR_UNLOCK (self);
1743 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1745 switch (transition) {
1746 case GST_STATE_CHANGE_PAUSED_TO_READY:
1747 gst_input_selector_reset (self);