1 /* GStreamer input selector
2 * Copyright (C) 2003 Julien Moutte <julien@moutte.net>
3 * Copyright (C) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
4 * Copyright (C) 2005 Jan Schmidt <thaytan@mad.scientist.com>
5 * Copyright (C) 2007 Wim Taymans <wim.taymans@gmail.com>
6 * Copyright (C) 2007 Andy Wingo <wingo@pobox.com>
7 * Copyright (C) 2008 Nokia Corporation. (contact <stefan.kost@nokia.com>)
8 * Copyright (C) 2011 Sebastian Dröge <sebastian.droege@collabora.co.uk>
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Library General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Library General Public License for more details.
20 * You should have received a copy of the GNU Library General Public
21 * License along with this library; if not, write to the
22 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
23 * Boston, MA 02110-1301, USA.
27 * SECTION:element-input-selector
28 * @see_also: #GstOutputSelector
30 * Direct one out of N input streams to the output pad.
32 * The input pads are from a GstPad subclass and have additional
33 * properties, which users may find useful, namely:
37 * "running-time": Running time of stream on pad (#gint64)
40 * "tags": The currently active tags on the pad (#GstTagList, boxed type)
43 * "active": If the pad is currently active (#gboolean)
46 * "always-ok" : Make an inactive pads return #GST_FLOW_OK instead of
47 * #GST_FLOW_NOT_LINKED
58 #include "gstinputselector.h"
60 #define DEBUG_CACHED_BUFFERS 0
62 GST_DEBUG_CATEGORY_STATIC (input_selector_debug);
63 #define GST_CAT_DEFAULT input_selector_debug
65 #define GST_TYPE_INPUT_SELECTOR_SYNC_MODE (gst_input_selector_sync_mode_get_type())
67 gst_input_selector_sync_mode_get_type (void)
69 static GType type = 0;
70 static const GEnumValue data[] = {
71 {GST_INPUT_SELECTOR_SYNC_MODE_ACTIVE_SEGMENT,
72 "Sync using the current active segment",
74 {GST_INPUT_SELECTOR_SYNC_MODE_CLOCK, "Sync using the clock", "clock"},
79 type = g_enum_register_static ("GstInputSelectorSyncMode", data);
84 #define GST_INPUT_SELECTOR_GET_LOCK(sel) (&((GstInputSelector*)(sel))->lock)
85 #define GST_INPUT_SELECTOR_GET_COND(sel) (&((GstInputSelector*)(sel))->cond)
86 #define GST_INPUT_SELECTOR_LOCK(sel) (g_mutex_lock (GST_INPUT_SELECTOR_GET_LOCK(sel)))
87 #define GST_INPUT_SELECTOR_UNLOCK(sel) (g_mutex_unlock (GST_INPUT_SELECTOR_GET_LOCK(sel)))
88 #define GST_INPUT_SELECTOR_WAIT(sel) (g_cond_wait (GST_INPUT_SELECTOR_GET_COND(sel), \
89 GST_INPUT_SELECTOR_GET_LOCK(sel)))
90 #define GST_INPUT_SELECTOR_BROADCAST(sel) (g_cond_broadcast (GST_INPUT_SELECTOR_GET_COND(sel)))
92 static GstStaticPadTemplate gst_input_selector_sink_factory =
93 GST_STATIC_PAD_TEMPLATE ("sink_%u",
98 static GstStaticPadTemplate gst_input_selector_src_factory =
99 GST_STATIC_PAD_TEMPLATE ("src",
102 GST_STATIC_CAPS_ANY);
114 #define DEFAULT_SYNC_STREAMS TRUE
115 #define DEFAULT_SYNC_MODE GST_INPUT_SELECTOR_SYNC_MODE_ACTIVE_SEGMENT
116 #define DEFAULT_CACHE_BUFFERS FALSE
117 #define DEFAULT_PAD_ALWAYS_OK TRUE
122 PROP_PAD_RUNNING_TIME,
135 static guint gst_input_selector_signals[LAST_SIGNAL] = { 0 };
137 static void gst_input_selector_active_pad_changed (GstInputSelector * sel,
138 GParamSpec * pspec, gpointer user_data);
139 static inline gboolean gst_input_selector_is_active_sinkpad (GstInputSelector *
141 static GstPad *gst_input_selector_activate_sinkpad (GstInputSelector * sel,
143 static GstPad *gst_input_selector_get_linked_pad (GstInputSelector * sel,
144 GstPad * pad, gboolean strict);
146 #define GST_TYPE_SELECTOR_PAD \
147 (gst_selector_pad_get_type())
148 #define GST_SELECTOR_PAD(obj) \
149 (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_SELECTOR_PAD, GstSelectorPad))
150 #define GST_SELECTOR_PAD_CLASS(klass) \
151 (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_SELECTOR_PAD, GstSelectorPadClass))
152 #define GST_IS_SELECTOR_PAD(obj) \
153 (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_SELECTOR_PAD))
154 #define GST_IS_SELECTOR_PAD_CLASS(klass) \
155 (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_SELECTOR_PAD))
156 #define GST_SELECTOR_PAD_CAST(obj) \
157 ((GstSelectorPad *)(obj))
159 typedef struct _GstSelectorPad GstSelectorPad;
160 typedef struct _GstSelectorPadClass GstSelectorPadClass;
161 typedef struct _GstSelectorPadCachedBuffer GstSelectorPadCachedBuffer;
163 struct _GstSelectorPad
167 gboolean active; /* when buffer have passed the pad */
168 gboolean pushed; /* when buffer was pushed downstream since activation */
169 gboolean eos; /* when EOS has been received */
170 gboolean eos_sent; /* when EOS was sent downstream */
171 gboolean discont; /* after switching we create a discont */
172 gboolean flushing; /* set after flush-start and before flush-stop */
174 GstTagList *tags; /* last tags received on the pad */
176 GstSegment segment; /* the current segment on the pad */
177 guint32 segment_seqnum; /* sequence number of the current segment */
179 gboolean events_pending; /* TRUE if sticky events need to be updated */
181 gboolean sending_cached_buffers;
182 GQueue *cached_buffers;
185 struct _GstSelectorPadCachedBuffer
191 struct _GstSelectorPadClass
196 GType gst_selector_pad_get_type (void);
197 static void gst_selector_pad_finalize (GObject * object);
198 static void gst_selector_pad_get_property (GObject * object,
199 guint prop_id, GValue * value, GParamSpec * pspec);
200 static void gst_selector_pad_set_property (GObject * object,
201 guint prop_id, const GValue * value, GParamSpec * pspec);
203 static gint64 gst_selector_pad_get_running_time (GstSelectorPad * pad);
204 static void gst_selector_pad_reset (GstSelectorPad * pad);
205 static gboolean gst_selector_pad_event (GstPad * pad, GstObject * parent,
207 static gboolean gst_selector_pad_query (GstPad * pad, GstObject * parent,
209 static GstIterator *gst_selector_pad_iterate_linked_pads (GstPad * pad,
211 static GstFlowReturn gst_selector_pad_chain (GstPad * pad, GstObject * parent,
213 static void gst_selector_pad_cache_buffer (GstSelectorPad * selpad,
215 static void gst_selector_pad_free_cached_buffers (GstSelectorPad * selpad);
217 G_DEFINE_TYPE (GstSelectorPad, gst_selector_pad, GST_TYPE_PAD);
220 gst_selector_pad_class_init (GstSelectorPadClass * klass)
222 GObjectClass *gobject_class;
224 gobject_class = (GObjectClass *) klass;
226 gobject_class->finalize = gst_selector_pad_finalize;
228 gobject_class->get_property = gst_selector_pad_get_property;
229 gobject_class->set_property = gst_selector_pad_set_property;
231 g_object_class_install_property (gobject_class, PROP_PAD_RUNNING_TIME,
232 g_param_spec_int64 ("running-time", "Running time",
233 "Running time of stream on pad", 0, G_MAXINT64, 0,
234 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
235 g_object_class_install_property (gobject_class, PROP_PAD_TAGS,
236 g_param_spec_boxed ("tags", "Tags",
237 "The currently active tags on the pad", GST_TYPE_TAG_LIST,
238 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
239 g_object_class_install_property (gobject_class, PROP_PAD_ACTIVE,
240 g_param_spec_boolean ("active", "Active",
241 "If the pad is currently active", FALSE,
242 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
243 /* FIXME: better property name? */
244 g_object_class_install_property (gobject_class, PROP_PAD_ALWAYS_OK,
245 g_param_spec_boolean ("always-ok", "Always OK",
246 "Make an inactive pad return OK instead of NOT_LINKED",
247 DEFAULT_PAD_ALWAYS_OK, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
251 gst_selector_pad_init (GstSelectorPad * pad)
253 pad->always_ok = DEFAULT_PAD_ALWAYS_OK;
254 gst_selector_pad_reset (pad);
258 gst_selector_pad_finalize (GObject * object)
262 pad = GST_SELECTOR_PAD_CAST (object);
265 gst_tag_list_unref (pad->tags);
266 gst_selector_pad_free_cached_buffers (pad);
268 G_OBJECT_CLASS (gst_selector_pad_parent_class)->finalize (object);
272 gst_selector_pad_set_property (GObject * object, guint prop_id,
273 const GValue * value, GParamSpec * pspec)
275 GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
278 case PROP_PAD_ALWAYS_OK:
279 GST_OBJECT_LOCK (object);
280 spad->always_ok = g_value_get_boolean (value);
281 GST_OBJECT_UNLOCK (object);
284 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
290 gst_selector_pad_get_property (GObject * object, guint prop_id,
291 GValue * value, GParamSpec * pspec)
293 GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
296 case PROP_PAD_RUNNING_TIME:
297 g_value_set_int64 (value, gst_selector_pad_get_running_time (spad));
300 GST_OBJECT_LOCK (object);
301 g_value_set_boxed (value, spad->tags);
302 GST_OBJECT_UNLOCK (object);
304 case PROP_PAD_ACTIVE:
306 GstInputSelector *sel;
308 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (spad));
310 g_value_set_boolean (value, gst_input_selector_is_active_sinkpad (sel,
311 GST_PAD_CAST (spad)));
312 gst_object_unref (sel);
314 g_value_set_boolean (value, FALSE);
318 case PROP_PAD_ALWAYS_OK:
319 GST_OBJECT_LOCK (object);
320 g_value_set_boolean (value, spad->always_ok);
321 GST_OBJECT_UNLOCK (object);
324 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
330 gst_selector_pad_get_running_time (GstSelectorPad * pad)
334 GST_OBJECT_LOCK (pad);
337 gst_segment_to_running_time (&pad->segment, pad->segment.format,
338 pad->segment.position);
340 GST_OBJECT_UNLOCK (pad);
342 GST_DEBUG_OBJECT (pad, "running time: %" GST_TIME_FORMAT
343 " segment: %" GST_SEGMENT_FORMAT, GST_TIME_ARGS (ret), &pad->segment);
348 /* must be called with the SELECTOR_LOCK */
350 gst_selector_pad_reset (GstSelectorPad * pad)
352 GST_OBJECT_LOCK (pad);
356 pad->eos_sent = FALSE;
357 pad->events_pending = FALSE;
358 pad->discont = FALSE;
359 pad->flushing = FALSE;
360 gst_segment_init (&pad->segment, GST_FORMAT_UNDEFINED);
361 pad->sending_cached_buffers = FALSE;
362 gst_selector_pad_free_cached_buffers (pad);
363 GST_OBJECT_UNLOCK (pad);
366 static GstSelectorPadCachedBuffer *
367 gst_selector_pad_new_cached_buffer (GstSelectorPad * selpad, GstBuffer * buffer)
369 GstSelectorPadCachedBuffer *cached_buffer =
370 g_slice_new (GstSelectorPadCachedBuffer);
371 cached_buffer->buffer = buffer;
372 cached_buffer->segment = selpad->segment;
373 return cached_buffer;
377 gst_selector_pad_free_cached_buffer (GstSelectorPadCachedBuffer * cached_buffer)
379 gst_buffer_unref (cached_buffer->buffer);
380 g_slice_free (GstSelectorPadCachedBuffer, cached_buffer);
383 /* must be called with the SELECTOR_LOCK */
385 gst_selector_pad_cache_buffer (GstSelectorPad * selpad, GstBuffer * buffer)
387 if (selpad->segment.format != GST_FORMAT_TIME) {
388 GST_DEBUG_OBJECT (selpad, "Buffer %p with segment not in time format, "
389 "not caching", buffer);
393 GST_DEBUG_OBJECT (selpad, "Caching buffer %p", buffer);
394 if (!selpad->cached_buffers)
395 selpad->cached_buffers = g_queue_new ();
396 g_queue_push_tail (selpad->cached_buffers,
397 gst_selector_pad_new_cached_buffer (selpad, buffer));
400 /* must be called with the SELECTOR_LOCK */
402 gst_selector_pad_free_cached_buffers (GstSelectorPad * selpad)
404 if (!selpad->cached_buffers)
407 GST_DEBUG_OBJECT (selpad, "Freeing cached buffers");
408 g_queue_free_full (selpad->cached_buffers,
409 (GDestroyNotify) gst_selector_pad_free_cached_buffer);
410 selpad->cached_buffers = NULL;
413 /* strictly get the linked pad from the sinkpad. If the pad is active we return
414 * the srcpad else we return NULL */
416 gst_selector_pad_iterate_linked_pads (GstPad * pad, GstObject * parent)
418 GstInputSelector *sel;
420 GstIterator *it = NULL;
423 sel = GST_INPUT_SELECTOR (parent);
425 otherpad = gst_input_selector_get_linked_pad (sel, pad, TRUE);
427 g_value_init (&val, GST_TYPE_PAD);
428 g_value_set_object (&val, otherpad);
429 it = gst_iterator_new_single (GST_TYPE_PAD, &val);
430 g_value_unset (&val);
431 gst_object_unref (otherpad);
437 /* must be called with the SELECTOR_LOCK, will block while the pad is blocked
438 * or return TRUE when flushing */
440 gst_input_selector_wait (GstInputSelector * self, GstSelectorPad * pad)
442 while (!self->eos && self->blocked && !self->flushing && !pad->flushing) {
443 /* we can be unlocked here when we are shutting down (flushing) or when we
445 GST_INPUT_SELECTOR_WAIT (self);
447 return self->flushing;
451 gst_selector_pad_event (GstPad * pad, GstObject * parent, GstEvent * event)
455 gboolean new_tags = FALSE;
456 GstInputSelector *sel;
457 GstSelectorPad *selpad;
458 GstPad *prev_active_sinkpad;
459 GstPad *active_sinkpad;
461 sel = GST_INPUT_SELECTOR (parent);
462 selpad = GST_SELECTOR_PAD_CAST (pad);
463 GST_DEBUG_OBJECT (selpad, "received event %" GST_PTR_FORMAT, event);
465 GST_INPUT_SELECTOR_LOCK (sel);
466 prev_active_sinkpad =
467 sel->active_sinkpad ? gst_object_ref (sel->active_sinkpad) : NULL;
468 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
469 gst_object_ref (active_sinkpad);
470 GST_INPUT_SELECTOR_UNLOCK (sel);
472 if (prev_active_sinkpad != active_sinkpad) {
473 if (prev_active_sinkpad)
474 g_object_notify (G_OBJECT (prev_active_sinkpad), "active");
475 g_object_notify (G_OBJECT (active_sinkpad), "active");
476 g_object_notify (G_OBJECT (sel), "active-pad");
478 if (prev_active_sinkpad)
479 gst_object_unref (prev_active_sinkpad);
480 gst_object_unref (active_sinkpad);
482 GST_INPUT_SELECTOR_LOCK (sel);
483 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
485 /* only forward if we are dealing with the active sinkpad */
486 forward = (pad == active_sinkpad);
488 switch (GST_EVENT_TYPE (event)) {
489 case GST_EVENT_STREAM_START:{
492 if (!gst_event_parse_group_id (event, &group_id))
493 sel->have_group_id = FALSE;
496 case GST_EVENT_FLUSH_START:
497 /* Unblock the pad if it's waiting */
498 selpad->flushing = TRUE;
500 GST_INPUT_SELECTOR_BROADCAST (sel);
502 case GST_EVENT_FLUSH_STOP:
503 gst_selector_pad_reset (selpad);
505 case GST_EVENT_SEGMENT:
507 gst_event_copy_segment (event, &selpad->segment);
508 selpad->segment_seqnum = gst_event_get_seqnum (event);
510 GST_DEBUG_OBJECT (pad, "configured SEGMENT %" GST_SEGMENT_FORMAT,
516 GstTagList *tags, *oldtags, *newtags;
518 gst_event_parse_tag (event, &tags);
520 GST_OBJECT_LOCK (selpad);
521 oldtags = selpad->tags;
523 newtags = gst_tag_list_merge (oldtags, tags, GST_TAG_MERGE_REPLACE);
524 selpad->tags = newtags;
525 GST_OBJECT_UNLOCK (selpad);
528 gst_tag_list_unref (oldtags);
529 GST_DEBUG_OBJECT (pad, "received tags %" GST_PTR_FORMAT, newtags);
539 /* Wait until we're the active sink pad or we're flushing */
540 while (!sel->eos && !sel->flushing && !selpad->flushing)
541 GST_INPUT_SELECTOR_WAIT (sel);
543 /* Notify all waiting pads about going EOS now */
545 GST_INPUT_SELECTOR_BROADCAST (sel);
548 selpad->eos_sent = TRUE;
549 GST_DEBUG_OBJECT (pad, "received EOS");
552 GstClockTime ts, dur;
554 GST_DEBUG_OBJECT (pad, "Received gap event: %" GST_PTR_FORMAT, event);
556 gst_event_parse_gap (event, &ts, &dur);
557 if (GST_CLOCK_TIME_IS_VALID (ts)) {
558 if (GST_CLOCK_TIME_IS_VALID (dur))
561 /* update the segment position */
562 GST_OBJECT_LOCK (pad);
563 selpad->segment.position = ts;
564 GST_OBJECT_UNLOCK (pad);
565 if (sel->sync_streams && active_sinkpad == pad)
566 GST_INPUT_SELECTOR_BROADCAST (sel);
574 GST_INPUT_SELECTOR_UNLOCK (sel);
576 g_object_notify (G_OBJECT (selpad), "tags");
578 GST_DEBUG_OBJECT (pad, "forwarding event");
579 res = gst_pad_push_event (sel->srcpad, event);
581 /* If we aren't forwarding the event because the pad is not the
582 * active_sinkpad, then set the flag on the pad
583 * that says a segment needs sending if/when that pad is activated.
584 * For all other cases, we send the event immediately, which makes
585 * sparse streams and other segment updates work correctly downstream.
587 if (GST_EVENT_IS_STICKY (event))
588 selpad->events_pending = TRUE;
589 gst_event_unref (event);
596 gst_selector_pad_query (GstPad * pad, GstObject * parent, GstQuery * query)
598 gboolean res = FALSE;
599 GstInputSelector *self = (GstInputSelector *) parent;
601 switch (GST_QUERY_TYPE (query)) {
603 /* always proxy caps query, regardless of active pad or not */
604 res = gst_pad_peer_query (self->srcpad, query);
606 case GST_QUERY_ALLOCATION:{
607 GstPad *active_sinkpad;
608 GstInputSelector *sel = GST_INPUT_SELECTOR (parent);
610 /* Only do the allocation query for the active sinkpad,
611 * after switching a reconfigure event is sent and upstream
612 * should reconfigure and do a new allocation query
614 if (GST_PAD_DIRECTION (pad) == GST_PAD_SINK) {
615 GST_INPUT_SELECTOR_LOCK (sel);
616 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
617 GST_INPUT_SELECTOR_UNLOCK (sel);
619 if (pad != active_sinkpad) {
627 res = gst_pad_query_default (pad, parent, query);
636 gst_input_selector_get_clipped_running_time (GstSegment * seg, GstBuffer * buf)
638 GstClockTime running_time;
640 running_time = GST_BUFFER_PTS (buf);
641 /* If possible try to get the running time at the end of the buffer */
642 if (GST_BUFFER_DURATION_IS_VALID (buf))
643 running_time += GST_BUFFER_DURATION (buf);
644 /* Only use the segment to convert to running time if the segment is
645 * in TIME format, otherwise do our best to try to sync */
646 if (GST_CLOCK_TIME_IS_VALID (seg->stop)) {
647 if (running_time > seg->stop) {
648 running_time = seg->stop;
651 return gst_segment_to_running_time (seg, GST_FORMAT_TIME, running_time);
654 /* must be called without the SELECTOR_LOCK, will wait until the running time
655 * of the active pad is after this pad or return TRUE when flushing */
657 gst_input_selector_wait_running_time (GstInputSelector * sel,
658 GstSelectorPad * selpad, GstBuffer * buf)
662 GST_DEBUG_OBJECT (selpad, "entering wait for buffer %p", buf);
664 /* If we have no valid timestamp we can't sync this buffer */
665 if (!GST_BUFFER_PTS_IS_VALID (buf)) {
666 GST_DEBUG_OBJECT (selpad, "leaving wait for buffer with "
667 "invalid timestamp");
671 seg = &selpad->segment;
674 * a) this is the active pad
675 * b) the pad or the selector is flushing
676 * c) the selector is not blocked
677 * d) the buffer running time is before the current running time
678 * (either active-seg or clock, depending on sync-mode)
681 GST_INPUT_SELECTOR_LOCK (sel);
683 GstPad *active_sinkpad;
684 GstSelectorPad *active_selpad;
686 gint64 cur_running_time;
687 GstClockTime running_time;
690 gst_input_selector_activate_sinkpad (sel, GST_PAD_CAST (selpad));
691 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
693 if (seg->format != GST_FORMAT_TIME) {
694 GST_DEBUG_OBJECT (selpad,
695 "Not waiting because we don't have a TIME segment");
696 GST_INPUT_SELECTOR_UNLOCK (sel);
700 running_time = gst_input_selector_get_clipped_running_time (seg, buf);
701 /* If this is outside the segment don't sync */
702 if (running_time == -1) {
703 GST_DEBUG_OBJECT (selpad,
704 "Not waiting because buffer is outside segment");
705 GST_INPUT_SELECTOR_UNLOCK (sel);
709 cur_running_time = GST_CLOCK_TIME_NONE;
710 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
711 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
713 GstClockTime base_time;
715 cur_running_time = gst_clock_get_time (clock);
716 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
717 if (base_time <= cur_running_time)
718 cur_running_time -= base_time;
720 cur_running_time = 0;
722 gst_object_unref (clock);
725 GstSegment *active_seg;
727 active_seg = &active_selpad->segment;
729 /* If the active segment is configured but not to time format
730 * we can't do any syncing at all */
731 if (active_seg->format != GST_FORMAT_TIME
732 && active_seg->format != GST_FORMAT_UNDEFINED) {
733 GST_DEBUG_OBJECT (selpad,
734 "Not waiting because active segment isn't in TIME format");
735 GST_INPUT_SELECTOR_UNLOCK (sel);
739 /* Get active pad's running time, if no configured segment yet keep at -1 */
740 if (active_seg->format == GST_FORMAT_TIME)
741 cur_running_time = gst_segment_to_running_time (active_seg,
742 GST_FORMAT_TIME, active_seg->position);
745 if (selpad != active_selpad && !sel->eos && !sel->flushing
746 && !selpad->flushing && (sel->blocked
747 || cur_running_time == GST_CLOCK_TIME_NONE
748 || running_time >= cur_running_time)) {
750 GST_DEBUG_OBJECT (selpad,
751 "Waiting for active streams to advance. %" GST_TIME_FORMAT " >= %"
752 GST_TIME_FORMAT, GST_TIME_ARGS (running_time),
753 GST_TIME_ARGS (cur_running_time));
755 GST_DEBUG_OBJECT (selpad, "Waiting for selector to unblock");
757 GST_INPUT_SELECTOR_WAIT (sel);
759 GST_INPUT_SELECTOR_UNLOCK (sel);
764 /* Return TRUE if the selector or the pad is flushing */
765 return (sel->flushing || selpad->flushing);
769 forward_sticky_events (GstPad * sinkpad, GstEvent ** event, gpointer user_data)
771 GstInputSelector *sel = GST_INPUT_SELECTOR (user_data);
773 if (GST_EVENT_TYPE (*event) == GST_EVENT_SEGMENT) {
774 GstSegment *seg = &GST_SELECTOR_PAD (sinkpad)->segment;
777 e = gst_event_new_segment (seg);
778 gst_event_set_seqnum (e, GST_SELECTOR_PAD_CAST (sinkpad)->segment_seqnum);
780 gst_pad_push_event (sel->srcpad, e);
781 } else if (GST_EVENT_TYPE (*event) == GST_EVENT_STREAM_START
782 && !sel->have_group_id) {
784 gst_pad_get_sticky_event (sel->srcpad, GST_EVENT_STREAM_START, 0);
786 /* Only push stream-start once if not all our streams have a stream-id */
788 gst_pad_push_event (sel->srcpad, gst_event_ref (*event));
790 gst_event_unref (tmp);
793 gst_pad_push_event (sel->srcpad, gst_event_ref (*event));
799 #if DEBUG_CACHED_BUFFERS
801 gst_input_selector_debug_cached_buffers (GstInputSelector * sel)
805 if (gst_debug_category_get_threshold (input_selector_debug) < GST_LEVEL_DEBUG)
808 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = walk->next) {
809 GstSelectorPad *selpad;
813 selpad = GST_SELECTOR_PAD_CAST (walk->data);
814 if (!selpad->cached_buffers) {
815 GST_DEBUG_OBJECT (selpad, "Cached buffers timestamps: <none>");
819 timestamps = g_string_new ("Cached buffers timestamps:");
820 for (l = selpad->cached_buffers->head; l != NULL; l = l->next) {
821 GstSelectorPadCachedBuffer *cached_buffer = l->data;
823 g_string_append_printf (timestamps, " %" GST_TIME_FORMAT,
824 GST_TIME_ARGS (GST_BUFFER_PTS (cached_buffer->buffer)));
826 GST_DEBUG_OBJECT (selpad, "%s", timestamps->str);
827 g_string_free (timestamps, TRUE);
832 /* must be called with the SELECTOR_LOCK */
834 gst_input_selector_cleanup_old_cached_buffers (GstInputSelector * sel,
838 gint64 cur_running_time;
841 cur_running_time = GST_CLOCK_TIME_NONE;
842 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
843 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
845 GstClockTime base_time;
847 cur_running_time = gst_clock_get_time (clock);
848 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
849 if (base_time <= cur_running_time)
850 cur_running_time -= base_time;
852 cur_running_time = 0;
854 gst_object_unref (clock);
857 GstPad *active_sinkpad;
858 GstSelectorPad *active_selpad;
859 GstSegment *active_seg;
861 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
862 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
863 active_seg = &active_selpad->segment;
865 /* Get active pad's running time, if no configured segment yet keep at -1 */
866 if (active_seg->format == GST_FORMAT_TIME)
867 cur_running_time = gst_segment_to_running_time (active_seg,
868 GST_FORMAT_TIME, active_seg->position);
871 if (!GST_CLOCK_TIME_IS_VALID (cur_running_time))
874 GST_DEBUG_OBJECT (sel, "Cleaning up old cached buffers");
875 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
876 GstSelectorPad *selpad;
878 GstSelectorPadCachedBuffer *cached_buffer;
879 GSList *maybe_remove;
880 guint queue_position;
882 selpad = GST_SELECTOR_PAD_CAST (walk->data);
883 if (!selpad->cached_buffers)
886 seg = &selpad->segment;
890 while ((cached_buffer = g_queue_peek_nth (selpad->cached_buffers,
892 GstBuffer *buffer = cached_buffer->buffer;
893 GstClockTime running_time;
896 /* If we have no valid timestamp we can't sync this buffer */
897 if (!GST_BUFFER_PTS_IS_VALID (buffer)) {
898 maybe_remove = g_slist_append (maybe_remove, cached_buffer);
899 queue_position = g_slist_length (maybe_remove);
903 /* the buffer is still valid if its duration is valid and the
904 * timestamp + duration is >= time, or if its duration is invalid
905 * and the timestamp is >= time */
906 running_time = gst_input_selector_get_clipped_running_time (seg, buffer);
907 GST_DEBUG_OBJECT (selpad,
908 "checking if buffer %p running time=%" GST_TIME_FORMAT
909 " >= stream time=%" GST_TIME_FORMAT, buffer,
910 GST_TIME_ARGS (running_time), GST_TIME_ARGS (cur_running_time));
911 if (running_time >= cur_running_time) {
915 GST_DEBUG_OBJECT (selpad, "Removing old cached buffer %p", buffer);
916 g_queue_pop_nth (selpad->cached_buffers, queue_position);
917 gst_selector_pad_free_cached_buffer (cached_buffer);
919 for (l = maybe_remove; l != NULL; l = g_slist_next (l)) {
920 /* A buffer after some invalid buffers was removed, it means the invalid buffers
921 * are old, lets also remove them */
922 cached_buffer = l->data;
923 g_queue_remove (selpad->cached_buffers, cached_buffer);
924 gst_selector_pad_free_cached_buffer (cached_buffer);
927 g_slist_free (maybe_remove);
932 g_slist_free (maybe_remove);
935 if (g_queue_is_empty (selpad->cached_buffers)) {
936 g_queue_free (selpad->cached_buffers);
937 selpad->cached_buffers = NULL;
941 #if DEBUG_CACHED_BUFFERS
942 gst_input_selector_debug_cached_buffers (sel);
947 gst_selector_pad_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
949 GstInputSelector *sel;
951 GstPad *active_sinkpad;
952 GstPad *prev_active_sinkpad = NULL;
953 GstSelectorPad *selpad;
955 sel = GST_INPUT_SELECTOR (parent);
956 selpad = GST_SELECTOR_PAD_CAST (pad);
958 GST_DEBUG_OBJECT (selpad,
959 "entering chain for buf %p with timestamp %" GST_TIME_FORMAT, buf,
960 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
962 GST_INPUT_SELECTOR_LOCK (sel);
964 GST_INPUT_SELECTOR_UNLOCK (sel);
968 /* wait or check for flushing */
969 if (gst_input_selector_wait (sel, selpad)) {
970 GST_INPUT_SELECTOR_UNLOCK (sel);
974 GST_LOG_OBJECT (pad, "getting active pad");
976 prev_active_sinkpad =
977 sel->active_sinkpad ? gst_object_ref (sel->active_sinkpad) : NULL;
978 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
980 /* In sync mode wait until the active pad has advanced
981 * after the running time of the current buffer */
982 if (sel->sync_streams) {
983 /* call chain for each cached buffer if we are not the active pad
984 * or if we are the active pad but didn't push anything yet. */
985 if (active_sinkpad != pad || !selpad->pushed) {
986 /* no need to check for sel->cache_buffers as selpad->cached_buffers
987 * will only be valid if cache_buffers is TRUE */
988 if (selpad->cached_buffers && !selpad->sending_cached_buffers) {
989 GstSelectorPadCachedBuffer *cached_buffer;
990 GstSegment saved_segment;
992 saved_segment = selpad->segment;
994 selpad->sending_cached_buffers = TRUE;
995 while (!sel->eos && !sel->flushing && !selpad->flushing &&
996 (cached_buffer = g_queue_pop_head (selpad->cached_buffers))) {
997 GST_DEBUG_OBJECT (pad, "Cached buffers found, "
998 "invoking chain for cached buffer %p", cached_buffer->buffer);
1000 selpad->segment = cached_buffer->segment;
1001 selpad->events_pending = TRUE;
1002 GST_INPUT_SELECTOR_UNLOCK (sel);
1003 gst_selector_pad_chain (pad, parent, cached_buffer->buffer);
1004 GST_INPUT_SELECTOR_LOCK (sel);
1006 /* we may have cleaned up the queue in the meantime because of
1008 if (!selpad->cached_buffers) {
1012 selpad->sending_cached_buffers = FALSE;
1014 /* all cached buffers sent, restore segment for current buffer */
1015 selpad->segment = saved_segment;
1016 selpad->events_pending = TRUE;
1018 /* Might have changed while calling chain for cached buffers */
1019 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
1023 if (active_sinkpad != pad) {
1024 GST_INPUT_SELECTOR_UNLOCK (sel);
1025 if (gst_input_selector_wait_running_time (sel, selpad, buf))
1027 GST_INPUT_SELECTOR_LOCK (sel);
1030 /* Might have changed while waiting */
1031 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
1035 GST_INPUT_SELECTOR_UNLOCK (sel);
1039 /* update the segment on the srcpad */
1040 if (GST_BUFFER_PTS_IS_VALID (buf)) {
1041 GstClockTime start_time = GST_BUFFER_PTS (buf);
1043 GST_LOG_OBJECT (pad, "received start time %" GST_TIME_FORMAT,
1044 GST_TIME_ARGS (start_time));
1045 if (GST_BUFFER_DURATION_IS_VALID (buf))
1046 GST_LOG_OBJECT (pad, "received end time %" GST_TIME_FORMAT,
1047 GST_TIME_ARGS (start_time + GST_BUFFER_DURATION (buf)));
1049 GST_OBJECT_LOCK (pad);
1050 selpad->segment.position = start_time;
1051 GST_OBJECT_UNLOCK (pad);
1054 /* Ignore buffers from pads except the selected one */
1055 if (pad != active_sinkpad)
1058 /* Tell all non-active pads that we advanced the running time */
1059 if (sel->sync_streams)
1060 GST_INPUT_SELECTOR_BROADCAST (sel);
1062 GST_INPUT_SELECTOR_UNLOCK (sel);
1064 if (prev_active_sinkpad != active_sinkpad) {
1065 if (prev_active_sinkpad)
1066 g_object_notify (G_OBJECT (prev_active_sinkpad), "active");
1067 g_object_notify (G_OBJECT (active_sinkpad), "active");
1068 g_object_notify (G_OBJECT (sel), "active-pad");
1071 /* if we have a pending events, push them now */
1072 if (G_UNLIKELY (prev_active_sinkpad != active_sinkpad
1073 || selpad->events_pending)) {
1074 gst_pad_sticky_events_foreach (GST_PAD_CAST (selpad), forward_sticky_events,
1076 selpad->events_pending = FALSE;
1079 if (prev_active_sinkpad) {
1080 gst_object_unref (prev_active_sinkpad);
1081 prev_active_sinkpad = NULL;
1084 if (selpad->discont) {
1085 buf = gst_buffer_make_writable (buf);
1087 GST_DEBUG_OBJECT (pad, "Marking discont buffer %p", buf);
1088 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
1089 selpad->discont = FALSE;
1093 GST_LOG_OBJECT (pad, "Forwarding buffer %p with timestamp %" GST_TIME_FORMAT,
1094 buf, GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
1096 /* Only make the buffer read-only when necessary */
1097 if (sel->sync_streams && sel->cache_buffers)
1098 buf = gst_buffer_ref (buf);
1099 res = gst_pad_push (sel->srcpad, buf);
1100 GST_LOG_OBJECT (pad, "Buffer %p forwarded result=%d", buf, res);
1102 GST_INPUT_SELECTOR_LOCK (sel);
1104 if (sel->sync_streams && sel->cache_buffers) {
1105 /* Might have changed while pushing */
1106 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
1107 /* only set pad to pushed if we are still the active pad */
1108 if (active_sinkpad == pad)
1109 selpad->pushed = TRUE;
1111 /* cache buffer as we may need it again if we change pads */
1112 gst_selector_pad_cache_buffer (selpad, buf);
1113 gst_input_selector_cleanup_old_cached_buffers (sel, pad);
1115 selpad->pushed = TRUE;
1117 GST_INPUT_SELECTOR_UNLOCK (sel);
1121 if (prev_active_sinkpad)
1122 gst_object_unref (prev_active_sinkpad);
1123 prev_active_sinkpad = NULL;
1127 /* dropped buffers */
1130 gboolean active_pad_pushed = GST_SELECTOR_PAD_CAST (active_sinkpad)->pushed;
1132 GST_DEBUG_OBJECT (pad, "Pad not active, discard buffer %p", buf);
1133 /* when we drop a buffer, we're creating a discont on this pad */
1134 selpad->discont = TRUE;
1135 GST_INPUT_SELECTOR_UNLOCK (sel);
1136 gst_buffer_unref (buf);
1138 /* figure out what to return upstream */
1139 GST_OBJECT_LOCK (selpad);
1140 if (selpad->always_ok || !active_pad_pushed)
1143 res = GST_FLOW_NOT_LINKED;
1144 GST_OBJECT_UNLOCK (selpad);
1150 GST_DEBUG_OBJECT (pad, "We are flushing, discard buffer %p", buf);
1151 gst_buffer_unref (buf);
1152 res = GST_FLOW_FLUSHING;
1157 GST_DEBUG_OBJECT (pad, "We are eos, discard buffer %p", buf);
1158 gst_buffer_unref (buf);
1164 static void gst_input_selector_dispose (GObject * object);
1165 static void gst_input_selector_finalize (GObject * object);
1167 static void gst_input_selector_set_property (GObject * object,
1168 guint prop_id, const GValue * value, GParamSpec * pspec);
1169 static void gst_input_selector_get_property (GObject * object,
1170 guint prop_id, GValue * value, GParamSpec * pspec);
1172 static GstPad *gst_input_selector_request_new_pad (GstElement * element,
1173 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps);
1174 static void gst_input_selector_release_pad (GstElement * element, GstPad * pad);
1176 static GstStateChangeReturn gst_input_selector_change_state (GstElement *
1177 element, GstStateChange transition);
1179 static gboolean gst_input_selector_event (GstPad * pad, GstObject * parent,
1181 static gint64 gst_input_selector_block (GstInputSelector * self);
1184 GST_DEBUG_CATEGORY_INIT (input_selector_debug, \
1185 "input-selector", 0, "An input stream selector element");
1186 #define gst_input_selector_parent_class parent_class
1187 G_DEFINE_TYPE_WITH_CODE (GstInputSelector, gst_input_selector, GST_TYPE_ELEMENT,
1191 gst_input_selector_class_init (GstInputSelectorClass * klass)
1193 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
1194 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
1196 gobject_class->dispose = gst_input_selector_dispose;
1197 gobject_class->finalize = gst_input_selector_finalize;
1199 gobject_class->set_property = gst_input_selector_set_property;
1200 gobject_class->get_property = gst_input_selector_get_property;
1202 g_object_class_install_property (gobject_class, PROP_N_PADS,
1203 g_param_spec_uint ("n-pads", "Number of Pads",
1204 "The number of sink pads", 0, G_MAXUINT, 0,
1205 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
1207 g_object_class_install_property (gobject_class, PROP_ACTIVE_PAD,
1208 g_param_spec_object ("active-pad", "Active pad",
1209 "The currently active sink pad", GST_TYPE_PAD,
1210 G_PARAM_READWRITE | GST_PARAM_MUTABLE_PLAYING |
1211 G_PARAM_STATIC_STRINGS));
1214 * GstInputSelector:sync-streams
1216 * If set to %TRUE all inactive streams will be synced to the
1217 * running time of the active stream or to the current clock.
1219 * To make sure no buffers are dropped by input-selector
1220 * that might be needed when switching the active pad,
1221 * sync-mode should be set to "clock" and cache-buffers to TRUE.
1223 g_object_class_install_property (gobject_class, PROP_SYNC_STREAMS,
1224 g_param_spec_boolean ("sync-streams", "Sync Streams",
1225 "Synchronize inactive streams to the running time of the active "
1226 "stream or to the current clock",
1227 DEFAULT_SYNC_STREAMS,
1228 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1229 GST_PARAM_MUTABLE_READY));
1232 * GstInputSelector:sync-mode
1234 * Select how input-selector will sync buffers when in sync-streams mode.
1236 * Note that when using the "active-segment" mode, the "active-segment" may
1237 * be ahead of current clock time when switching the active pad, as the current
1238 * active pad may have pushed more buffers than what was displayed/consumed,
1239 * which may cause delays and some missing buffers.
1241 g_object_class_install_property (gobject_class, PROP_SYNC_MODE,
1242 g_param_spec_enum ("sync-mode", "Sync mode",
1243 "Behavior in sync-streams mode", GST_TYPE_INPUT_SELECTOR_SYNC_MODE,
1245 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1246 GST_PARAM_MUTABLE_READY));
1249 * GstInputSelector:cache-buffers
1251 * If set to %TRUE and GstInputSelector:sync-streams is also set to %TRUE,
1252 * the active pad will cache the buffers still considered valid (after current
1253 * running time, see sync-mode) to avoid missing frames if/when the pad is
1256 * The active pad may push more buffers than what is currently displayed/consumed
1257 * and when changing pads those buffers will be discarded and the only way to
1258 * reactivate that pad without loosing the already consumed buffers is to enable cache.
1260 g_object_class_install_property (gobject_class, PROP_CACHE_BUFFERS,
1261 g_param_spec_boolean ("cache-buffers", "Cache Buffers",
1262 "Cache buffers for active-pad",
1263 DEFAULT_CACHE_BUFFERS,
1264 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1265 GST_PARAM_MUTABLE_READY));
1268 * GstInputSelector::block:
1269 * @inputselector: the #GstInputSelector
1271 * Block all sink pads in preparation for a switch. Returns the stop time of
1272 * the current switch segment, as a running time, or 0 if there is no current
1273 * active pad or the current active pad never received data.
1275 gst_input_selector_signals[SIGNAL_BLOCK] =
1276 g_signal_new ("block", G_TYPE_FROM_CLASS (klass),
1277 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1278 G_STRUCT_OFFSET (GstInputSelectorClass, block), NULL, NULL,
1279 g_cclosure_marshal_generic, G_TYPE_INT64, 0);
1281 gst_element_class_set_static_metadata (gstelement_class, "Input selector",
1282 "Generic", "N-to-1 input stream selector",
1283 "Julien Moutte <julien@moutte.net>, "
1284 "Jan Schmidt <thaytan@mad.scientist.com>, "
1285 "Wim Taymans <wim.taymans@gmail.com>");
1286 gst_element_class_add_pad_template (gstelement_class,
1287 gst_static_pad_template_get (&gst_input_selector_sink_factory));
1288 gst_element_class_add_pad_template (gstelement_class,
1289 gst_static_pad_template_get (&gst_input_selector_src_factory));
1291 gstelement_class->request_new_pad = gst_input_selector_request_new_pad;
1292 gstelement_class->release_pad = gst_input_selector_release_pad;
1293 gstelement_class->change_state = gst_input_selector_change_state;
1295 klass->block = GST_DEBUG_FUNCPTR (gst_input_selector_block);
1299 gst_input_selector_init (GstInputSelector * sel)
1301 sel->srcpad = gst_pad_new ("src", GST_PAD_SRC);
1302 gst_pad_set_iterate_internal_links_function (sel->srcpad,
1303 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1304 gst_pad_set_event_function (sel->srcpad,
1305 GST_DEBUG_FUNCPTR (gst_input_selector_event));
1306 GST_OBJECT_FLAG_SET (sel->srcpad, GST_PAD_FLAG_PROXY_CAPS);
1307 gst_element_add_pad (GST_ELEMENT (sel), sel->srcpad);
1308 /* sinkpad management */
1309 sel->active_sinkpad = NULL;
1311 sel->sync_streams = DEFAULT_SYNC_STREAMS;
1312 sel->have_group_id = TRUE;
1314 g_mutex_init (&sel->lock);
1315 g_cond_init (&sel->cond);
1316 sel->blocked = FALSE;
1319 /* lets give a change for downstream to do something on
1320 * active-pad change before we start pushing new buffers */
1321 g_signal_connect_data (sel, "notify::active-pad",
1322 (GCallback) gst_input_selector_active_pad_changed, NULL,
1323 NULL, G_CONNECT_AFTER);
1327 gst_input_selector_dispose (GObject * object)
1329 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1331 if (sel->active_sinkpad) {
1332 gst_object_unref (sel->active_sinkpad);
1333 sel->active_sinkpad = NULL;
1335 G_OBJECT_CLASS (parent_class)->dispose (object);
1339 gst_input_selector_finalize (GObject * object)
1341 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1343 g_mutex_clear (&sel->lock);
1344 g_cond_clear (&sel->cond);
1346 G_OBJECT_CLASS (parent_class)->finalize (object);
1349 /* this function must be called with the SELECTOR_LOCK. It returns TRUE when the
1350 * active pad changed. */
1352 gst_input_selector_set_active_pad (GstInputSelector * self, GstPad * pad)
1354 GstSelectorPad *old, *new;
1355 GstPad **active_pad_p;
1357 if (pad == self->active_sinkpad)
1360 old = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
1361 new = GST_SELECTOR_PAD_CAST (pad);
1363 GST_DEBUG_OBJECT (self, "setting active pad to %s:%s",
1364 GST_DEBUG_PAD_NAME (new));
1367 old->pushed = FALSE;
1369 new->pushed = FALSE;
1371 /* Send a new SEGMENT event on the new pad next */
1372 if (old != new && new)
1373 new->events_pending = TRUE;
1375 active_pad_p = &self->active_sinkpad;
1376 gst_object_replace ((GstObject **) active_pad_p, GST_OBJECT_CAST (pad));
1378 if (old && old != new)
1379 gst_pad_push_event (GST_PAD_CAST (old), gst_event_new_reconfigure ());
1381 gst_pad_push_event (GST_PAD_CAST (new), gst_event_new_reconfigure ());
1383 GST_DEBUG_OBJECT (self, "New active pad is %" GST_PTR_FORMAT,
1384 self->active_sinkpad);
1386 if (old != new && new && new->eos && !new->eos_sent) {
1388 GST_INPUT_SELECTOR_BROADCAST (self);
1395 gst_input_selector_set_property (GObject * object, guint prop_id,
1396 const GValue * value, GParamSpec * pspec)
1398 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1401 case PROP_ACTIVE_PAD:
1405 pad = g_value_get_object (value);
1407 GST_INPUT_SELECTOR_LOCK (sel);
1409 #if DEBUG_CACHED_BUFFERS
1410 gst_input_selector_debug_cached_buffers (sel);
1413 gst_input_selector_set_active_pad (sel, pad);
1415 #if DEBUG_CACHED_BUFFERS
1416 gst_input_selector_debug_cached_buffers (sel);
1419 GST_INPUT_SELECTOR_UNLOCK (sel);
1422 case PROP_SYNC_STREAMS:
1423 GST_INPUT_SELECTOR_LOCK (sel);
1424 sel->sync_streams = g_value_get_boolean (value);
1425 GST_INPUT_SELECTOR_UNLOCK (sel);
1427 case PROP_SYNC_MODE:
1428 GST_INPUT_SELECTOR_LOCK (sel);
1429 sel->sync_mode = g_value_get_enum (value);
1430 GST_INPUT_SELECTOR_UNLOCK (sel);
1432 case PROP_CACHE_BUFFERS:
1433 GST_INPUT_SELECTOR_LOCK (object);
1434 sel->cache_buffers = g_value_get_boolean (value);
1435 GST_INPUT_SELECTOR_UNLOCK (object);
1438 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1444 gst_input_selector_active_pad_changed (GstInputSelector * sel,
1445 GParamSpec * pspec, gpointer user_data)
1447 /* Wake up all non-active pads in sync mode, they might be
1448 * the active pad now */
1449 if (sel->sync_streams)
1450 GST_INPUT_SELECTOR_BROADCAST (sel);
1454 gst_input_selector_get_property (GObject * object, guint prop_id,
1455 GValue * value, GParamSpec * pspec)
1457 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1461 GST_INPUT_SELECTOR_LOCK (object);
1462 g_value_set_uint (value, sel->n_pads);
1463 GST_INPUT_SELECTOR_UNLOCK (object);
1465 case PROP_ACTIVE_PAD:
1466 GST_INPUT_SELECTOR_LOCK (object);
1467 g_value_set_object (value, sel->active_sinkpad);
1468 GST_INPUT_SELECTOR_UNLOCK (object);
1470 case PROP_SYNC_STREAMS:
1471 GST_INPUT_SELECTOR_LOCK (object);
1472 g_value_set_boolean (value, sel->sync_streams);
1473 GST_INPUT_SELECTOR_UNLOCK (object);
1475 case PROP_SYNC_MODE:
1476 GST_INPUT_SELECTOR_LOCK (object);
1477 g_value_set_enum (value, sel->sync_mode);
1478 GST_INPUT_SELECTOR_UNLOCK (object);
1480 case PROP_CACHE_BUFFERS:
1481 GST_INPUT_SELECTOR_LOCK (object);
1482 g_value_set_boolean (value, sel->cache_buffers);
1483 GST_INPUT_SELECTOR_UNLOCK (object);
1486 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1492 gst_input_selector_get_linked_pad (GstInputSelector * sel, GstPad * pad,
1495 GstPad *otherpad = NULL;
1497 GST_INPUT_SELECTOR_LOCK (sel);
1498 if (pad == sel->srcpad)
1499 otherpad = sel->active_sinkpad;
1500 else if (pad == sel->active_sinkpad || !strict)
1501 otherpad = sel->srcpad;
1503 gst_object_ref (otherpad);
1504 GST_INPUT_SELECTOR_UNLOCK (sel);
1510 gst_input_selector_event (GstPad * pad, GstObject * parent, GstEvent * event)
1512 GstInputSelector *sel;
1513 gboolean result = FALSE;
1515 gboolean done = FALSE;
1516 GValue item = { 0, };
1518 GList *pushed_pads = NULL;
1520 sel = GST_INPUT_SELECTOR (parent);
1521 /* Send upstream events to all sinkpads */
1522 iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1524 /* This is now essentially a copy of gst_pad_event_default_dispatch
1525 * with a different iterator */
1527 switch (gst_iterator_next (iter, &item)) {
1528 case GST_ITERATOR_OK:
1529 eventpad = g_value_get_object (&item);
1531 /* if already pushed, skip */
1532 if (g_list_find (pushed_pads, eventpad)) {
1533 g_value_reset (&item);
1537 gst_event_ref (event);
1538 result |= gst_pad_push_event (eventpad, event);
1540 g_value_reset (&item);
1542 case GST_ITERATOR_RESYNC:
1543 /* We don't reset the result here because we don't push the event
1544 * again on pads that got the event already and because we need
1545 * to consider the result of the previous pushes */
1546 gst_iterator_resync (iter);
1548 case GST_ITERATOR_ERROR:
1549 GST_ERROR_OBJECT (pad, "Could not iterate over sinkpads");
1552 case GST_ITERATOR_DONE:
1557 g_value_unset (&item);
1558 gst_iterator_free (iter);
1560 g_list_free (pushed_pads);
1562 gst_event_unref (event);
1567 /* check if the pad is the active sinkpad */
1568 static inline gboolean
1569 gst_input_selector_is_active_sinkpad (GstInputSelector * sel, GstPad * pad)
1573 GST_INPUT_SELECTOR_LOCK (sel);
1574 res = (pad == sel->active_sinkpad);
1575 GST_INPUT_SELECTOR_UNLOCK (sel);
1580 /* Get or create the active sinkpad, must be called with SELECTOR_LOCK */
1582 gst_input_selector_activate_sinkpad (GstInputSelector * sel, GstPad * pad)
1584 GstPad *active_sinkpad;
1585 GstSelectorPad *selpad;
1587 selpad = GST_SELECTOR_PAD_CAST (pad);
1589 selpad->active = TRUE;
1590 active_sinkpad = sel->active_sinkpad;
1591 if (active_sinkpad == NULL) {
1592 GValue item = G_VALUE_INIT;
1593 GstIterator *iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1594 GstIteratorResult ires;
1596 while ((ires = gst_iterator_next (iter, &item)) == GST_ITERATOR_RESYNC)
1597 gst_iterator_resync (iter);
1598 if (ires == GST_ITERATOR_OK) {
1599 /* If no pad is currently selected, we return the first usable pad to
1600 * guarantee consistency */
1602 active_sinkpad = sel->active_sinkpad = g_value_dup_object (&item);
1603 g_value_reset (&item);
1604 GST_DEBUG_OBJECT (sel, "Activating pad %s:%s",
1605 GST_DEBUG_PAD_NAME (active_sinkpad));
1607 GST_WARNING_OBJECT (sel, "Couldn't find a default sink pad");
1608 gst_iterator_free (iter);
1611 return active_sinkpad;
1615 gst_input_selector_request_new_pad (GstElement * element,
1616 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps)
1618 GstInputSelector *sel;
1620 GstPad *sinkpad = NULL;
1622 g_return_val_if_fail (templ->direction == GST_PAD_SINK, NULL);
1624 sel = GST_INPUT_SELECTOR (element);
1626 GST_INPUT_SELECTOR_LOCK (sel);
1628 GST_LOG_OBJECT (sel, "Creating new pad sink_%u", sel->padcount);
1629 name = g_strdup_printf ("sink_%u", sel->padcount++);
1630 sinkpad = g_object_new (GST_TYPE_SELECTOR_PAD,
1631 "name", name, "direction", templ->direction, "template", templ, NULL);
1636 gst_pad_set_event_function (sinkpad,
1637 GST_DEBUG_FUNCPTR (gst_selector_pad_event));
1638 gst_pad_set_query_function (sinkpad,
1639 GST_DEBUG_FUNCPTR (gst_selector_pad_query));
1640 gst_pad_set_chain_function (sinkpad,
1641 GST_DEBUG_FUNCPTR (gst_selector_pad_chain));
1642 gst_pad_set_iterate_internal_links_function (sinkpad,
1643 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1645 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_CAPS);
1646 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_ALLOCATION);
1647 gst_pad_set_active (sinkpad, TRUE);
1648 gst_element_add_pad (GST_ELEMENT (sel), sinkpad);
1649 GST_INPUT_SELECTOR_UNLOCK (sel);
1655 gst_input_selector_release_pad (GstElement * element, GstPad * pad)
1657 GstInputSelector *sel;
1659 sel = GST_INPUT_SELECTOR (element);
1660 GST_LOG_OBJECT (sel, "Releasing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1662 GST_INPUT_SELECTOR_LOCK (sel);
1663 /* if the pad was the active pad, makes us select a new one */
1664 if (sel->active_sinkpad == pad) {
1665 GST_DEBUG_OBJECT (sel, "Deactivating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1666 gst_object_unref (sel->active_sinkpad);
1667 sel->active_sinkpad = NULL;
1670 GST_INPUT_SELECTOR_UNLOCK (sel);
1672 gst_pad_set_active (pad, FALSE);
1673 gst_element_remove_pad (GST_ELEMENT (sel), pad);
1677 gst_input_selector_reset (GstInputSelector * sel)
1681 GST_INPUT_SELECTOR_LOCK (sel);
1682 /* clear active pad */
1683 if (sel->active_sinkpad) {
1684 gst_object_unref (sel->active_sinkpad);
1685 sel->active_sinkpad = NULL;
1687 /* reset each of our sinkpads state */
1688 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
1689 GstSelectorPad *selpad = GST_SELECTOR_PAD_CAST (walk->data);
1691 gst_selector_pad_reset (selpad);
1694 gst_tag_list_unref (selpad->tags);
1695 selpad->tags = NULL;
1698 sel->have_group_id = TRUE;
1699 GST_INPUT_SELECTOR_UNLOCK (sel);
1702 static GstStateChangeReturn
1703 gst_input_selector_change_state (GstElement * element,
1704 GstStateChange transition)
1706 GstInputSelector *self = GST_INPUT_SELECTOR (element);
1707 GstStateChangeReturn result;
1709 switch (transition) {
1710 case GST_STATE_CHANGE_READY_TO_PAUSED:
1711 GST_INPUT_SELECTOR_LOCK (self);
1713 self->blocked = FALSE;
1714 self->flushing = FALSE;
1715 GST_INPUT_SELECTOR_UNLOCK (self);
1717 case GST_STATE_CHANGE_PAUSED_TO_READY:
1718 /* first unlock before we call the parent state change function, which
1719 * tries to acquire the stream lock when going to ready. */
1720 GST_INPUT_SELECTOR_LOCK (self);
1722 self->blocked = FALSE;
1723 self->flushing = TRUE;
1724 GST_INPUT_SELECTOR_BROADCAST (self);
1725 GST_INPUT_SELECTOR_UNLOCK (self);
1731 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1733 switch (transition) {
1734 case GST_STATE_CHANGE_PAUSED_TO_READY:
1735 gst_input_selector_reset (self);
1745 gst_input_selector_block (GstInputSelector * self)
1748 GstSelectorPad *spad;
1750 GST_INPUT_SELECTOR_LOCK (self);
1753 GST_WARNING_OBJECT (self, "switch already blocked");
1755 self->blocked = TRUE;
1756 spad = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
1759 ret = gst_selector_pad_get_running_time (spad);
1761 GST_DEBUG_OBJECT (self, "no active pad while blocking");
1763 GST_INPUT_SELECTOR_UNLOCK (self);