1 /* GStreamer input selector
2 * Copyright (C) 2003 Julien Moutte <julien@moutte.net>
3 * Copyright (C) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
4 * Copyright (C) 2005 Jan Schmidt <thaytan@mad.scientist.com>
5 * Copyright (C) 2007 Wim Taymans <wim.taymans@gmail.com>
6 * Copyright (C) 2007 Andy Wingo <wingo@pobox.com>
7 * Copyright (C) 2008 Nokia Corporation. (contact <stefan.kost@nokia.com>)
8 * Copyright (C) 2011 Sebastian Dröge <sebastian.droege@collabora.co.uk>
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Library General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Library General Public License for more details.
20 * You should have received a copy of the GNU Library General Public
21 * License along with this library; if not, write to the
22 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
23 * Boston, MA 02110-1301, USA.
27 * SECTION:element-input-selector
28 * @see_also: #GstOutputSelector
30 * Direct one out of N input streams to the output pad.
32 * The input pads are from a GstPad subclass and have additional
33 * properties, which users may find useful, namely:
37 * "running-time": Running time of stream on pad (#gint64)
40 * "tags": The currently active tags on the pad (#GstTagList, boxed type)
43 * "active": If the pad is currently active (#gboolean)
46 * "always-ok" : Make an inactive pads return #GST_FLOW_OK instead of
47 * #GST_FLOW_NOT_LINKED
58 #include "gstinputselector.h"
60 #define DEBUG_CACHED_BUFFERS 0
62 GST_DEBUG_CATEGORY_STATIC (input_selector_debug);
63 #define GST_CAT_DEFAULT input_selector_debug
65 #define GST_TYPE_INPUT_SELECTOR_SYNC_MODE (gst_input_selector_sync_mode_get_type())
67 gst_input_selector_sync_mode_get_type (void)
69 static GType type = 0;
70 static const GEnumValue data[] = {
71 {GST_INPUT_SELECTOR_SYNC_MODE_ACTIVE_SEGMENT,
72 "Sync using the current active segment",
74 {GST_INPUT_SELECTOR_SYNC_MODE_CLOCK, "Sync using the clock", "clock"},
79 type = g_enum_register_static ("GstInputSelectorSyncMode", data);
84 #define GST_INPUT_SELECTOR_GET_LOCK(sel) (&((GstInputSelector*)(sel))->lock)
85 #define GST_INPUT_SELECTOR_GET_COND(sel) (&((GstInputSelector*)(sel))->cond)
86 #define GST_INPUT_SELECTOR_LOCK(sel) (g_mutex_lock (GST_INPUT_SELECTOR_GET_LOCK(sel)))
87 #define GST_INPUT_SELECTOR_UNLOCK(sel) (g_mutex_unlock (GST_INPUT_SELECTOR_GET_LOCK(sel)))
88 #define GST_INPUT_SELECTOR_WAIT(sel) (g_cond_wait (GST_INPUT_SELECTOR_GET_COND(sel), \
89 GST_INPUT_SELECTOR_GET_LOCK(sel)))
90 #define GST_INPUT_SELECTOR_BROADCAST(sel) (g_cond_broadcast (GST_INPUT_SELECTOR_GET_COND(sel)))
92 static GstStaticPadTemplate gst_input_selector_sink_factory =
93 GST_STATIC_PAD_TEMPLATE ("sink_%u",
98 static GstStaticPadTemplate gst_input_selector_src_factory =
99 GST_STATIC_PAD_TEMPLATE ("src",
102 GST_STATIC_CAPS_ANY);
114 #define DEFAULT_SYNC_STREAMS TRUE
115 #define DEFAULT_SYNC_MODE GST_INPUT_SELECTOR_SYNC_MODE_ACTIVE_SEGMENT
116 #define DEFAULT_CACHE_BUFFERS FALSE
117 #define DEFAULT_PAD_ALWAYS_OK TRUE
122 PROP_PAD_RUNNING_TIME,
128 static void gst_input_selector_active_pad_changed (GstInputSelector * sel,
129 GParamSpec * pspec, gpointer user_data);
130 static inline gboolean gst_input_selector_is_active_sinkpad (GstInputSelector *
132 static GstPad *gst_input_selector_get_active_sinkpad (GstInputSelector * sel);
133 static GstPad *gst_input_selector_get_linked_pad (GstInputSelector * sel,
134 GstPad * pad, gboolean strict);
136 #define GST_TYPE_SELECTOR_PAD \
137 (gst_selector_pad_get_type())
138 #define GST_SELECTOR_PAD(obj) \
139 (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_SELECTOR_PAD, GstSelectorPad))
140 #define GST_SELECTOR_PAD_CLASS(klass) \
141 (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_SELECTOR_PAD, GstSelectorPadClass))
142 #define GST_IS_SELECTOR_PAD(obj) \
143 (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_SELECTOR_PAD))
144 #define GST_IS_SELECTOR_PAD_CLASS(klass) \
145 (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_SELECTOR_PAD))
146 #define GST_SELECTOR_PAD_CAST(obj) \
147 ((GstSelectorPad *)(obj))
149 typedef struct _GstSelectorPad GstSelectorPad;
150 typedef struct _GstSelectorPadClass GstSelectorPadClass;
151 typedef struct _GstSelectorPadCachedBuffer GstSelectorPadCachedBuffer;
153 struct _GstSelectorPad
157 gboolean pushed; /* when buffer was pushed downstream since activation */
158 gboolean eos; /* when EOS has been received */
159 gboolean eos_sent; /* when EOS was sent downstream */
160 gboolean discont; /* after switching we create a discont */
161 gboolean flushing; /* set after flush-start and before flush-stop */
163 GstTagList *tags; /* last tags received on the pad */
165 GstSegment segment; /* the current segment on the pad */
166 guint32 segment_seqnum; /* sequence number of the current segment */
168 gboolean events_pending; /* TRUE if sticky events need to be updated */
170 gboolean sending_cached_buffers;
171 GQueue *cached_buffers;
174 struct _GstSelectorPadCachedBuffer
180 struct _GstSelectorPadClass
185 GType gst_selector_pad_get_type (void);
186 static void gst_selector_pad_finalize (GObject * object);
187 static void gst_selector_pad_get_property (GObject * object,
188 guint prop_id, GValue * value, GParamSpec * pspec);
189 static void gst_selector_pad_set_property (GObject * object,
190 guint prop_id, const GValue * value, GParamSpec * pspec);
192 static gint64 gst_selector_pad_get_running_time (GstSelectorPad * pad);
193 static void gst_selector_pad_reset (GstSelectorPad * pad);
194 static gboolean gst_selector_pad_event (GstPad * pad, GstObject * parent,
196 static gboolean gst_selector_pad_query (GstPad * pad, GstObject * parent,
198 static GstIterator *gst_selector_pad_iterate_linked_pads (GstPad * pad,
200 static GstFlowReturn gst_selector_pad_chain (GstPad * pad, GstObject * parent,
202 static void gst_selector_pad_cache_buffer (GstSelectorPad * selpad,
204 static void gst_selector_pad_free_cached_buffers (GstSelectorPad * selpad);
206 G_DEFINE_TYPE (GstSelectorPad, gst_selector_pad, GST_TYPE_PAD);
209 gst_selector_pad_class_init (GstSelectorPadClass * klass)
211 GObjectClass *gobject_class;
213 gobject_class = (GObjectClass *) klass;
215 gobject_class->finalize = gst_selector_pad_finalize;
217 gobject_class->get_property = gst_selector_pad_get_property;
218 gobject_class->set_property = gst_selector_pad_set_property;
220 g_object_class_install_property (gobject_class, PROP_PAD_RUNNING_TIME,
221 g_param_spec_int64 ("running-time", "Running time",
222 "Running time of stream on pad", 0, G_MAXINT64, 0,
223 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
224 g_object_class_install_property (gobject_class, PROP_PAD_TAGS,
225 g_param_spec_boxed ("tags", "Tags",
226 "The currently active tags on the pad", GST_TYPE_TAG_LIST,
227 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
228 g_object_class_install_property (gobject_class, PROP_PAD_ACTIVE,
229 g_param_spec_boolean ("active", "Active",
230 "If the pad is currently active", FALSE,
231 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
232 /* FIXME: better property name? */
233 g_object_class_install_property (gobject_class, PROP_PAD_ALWAYS_OK,
234 g_param_spec_boolean ("always-ok", "Always OK",
235 "Make an inactive pad return OK instead of NOT_LINKED",
236 DEFAULT_PAD_ALWAYS_OK, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
240 gst_selector_pad_init (GstSelectorPad * pad)
242 pad->always_ok = DEFAULT_PAD_ALWAYS_OK;
243 gst_selector_pad_reset (pad);
247 gst_selector_pad_finalize (GObject * object)
251 pad = GST_SELECTOR_PAD_CAST (object);
254 gst_tag_list_unref (pad->tags);
255 gst_selector_pad_free_cached_buffers (pad);
257 G_OBJECT_CLASS (gst_selector_pad_parent_class)->finalize (object);
261 gst_selector_pad_set_property (GObject * object, guint prop_id,
262 const GValue * value, GParamSpec * pspec)
264 GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
267 case PROP_PAD_ALWAYS_OK:
268 GST_OBJECT_LOCK (object);
269 spad->always_ok = g_value_get_boolean (value);
270 GST_OBJECT_UNLOCK (object);
273 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
279 gst_selector_pad_get_property (GObject * object, guint prop_id,
280 GValue * value, GParamSpec * pspec)
282 GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
285 case PROP_PAD_RUNNING_TIME:
286 g_value_set_int64 (value, gst_selector_pad_get_running_time (spad));
289 GST_OBJECT_LOCK (object);
290 g_value_set_boxed (value, spad->tags);
291 GST_OBJECT_UNLOCK (object);
293 case PROP_PAD_ACTIVE:
295 GstInputSelector *sel;
297 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (spad));
299 g_value_set_boolean (value, gst_input_selector_is_active_sinkpad (sel,
300 GST_PAD_CAST (spad)));
301 gst_object_unref (sel);
303 g_value_set_boolean (value, FALSE);
307 case PROP_PAD_ALWAYS_OK:
308 GST_OBJECT_LOCK (object);
309 g_value_set_boolean (value, spad->always_ok);
310 GST_OBJECT_UNLOCK (object);
313 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
319 gst_selector_pad_get_running_time (GstSelectorPad * pad)
323 GST_OBJECT_LOCK (pad);
324 if (pad->segment.format == GST_FORMAT_TIME) {
326 gst_segment_to_running_time (&pad->segment, pad->segment.format,
327 pad->segment.position);
329 GST_OBJECT_UNLOCK (pad);
331 GST_DEBUG_OBJECT (pad, "running time: %" GST_TIME_FORMAT
332 " segment: %" GST_SEGMENT_FORMAT, GST_TIME_ARGS (ret), &pad->segment);
337 /* must be called with the SELECTOR_LOCK */
339 gst_selector_pad_reset (GstSelectorPad * pad)
341 GST_OBJECT_LOCK (pad);
344 pad->eos_sent = FALSE;
345 pad->events_pending = FALSE;
346 pad->discont = FALSE;
347 pad->flushing = FALSE;
348 gst_segment_init (&pad->segment, GST_FORMAT_UNDEFINED);
349 pad->sending_cached_buffers = FALSE;
350 gst_selector_pad_free_cached_buffers (pad);
351 GST_OBJECT_UNLOCK (pad);
354 static GstSelectorPadCachedBuffer *
355 gst_selector_pad_new_cached_buffer (GstSelectorPad * selpad, GstBuffer * buffer)
357 GstSelectorPadCachedBuffer *cached_buffer =
358 g_slice_new (GstSelectorPadCachedBuffer);
359 cached_buffer->buffer = buffer;
360 cached_buffer->segment = selpad->segment;
361 return cached_buffer;
365 gst_selector_pad_free_cached_buffer (GstSelectorPadCachedBuffer * cached_buffer)
367 if (cached_buffer->buffer)
368 gst_buffer_unref (cached_buffer->buffer);
369 g_slice_free (GstSelectorPadCachedBuffer, cached_buffer);
372 /* must be called with the SELECTOR_LOCK */
374 gst_selector_pad_cache_buffer (GstSelectorPad * selpad, GstBuffer * buffer)
376 if (selpad->segment.format != GST_FORMAT_TIME) {
377 GST_DEBUG_OBJECT (selpad, "Buffer %p with segment not in time format, "
378 "not caching", buffer);
382 GST_DEBUG_OBJECT (selpad, "Caching buffer %p", buffer);
383 if (!selpad->cached_buffers)
384 selpad->cached_buffers = g_queue_new ();
385 g_queue_push_tail (selpad->cached_buffers,
386 gst_selector_pad_new_cached_buffer (selpad, buffer));
389 /* must be called with the SELECTOR_LOCK */
391 gst_selector_pad_free_cached_buffers (GstSelectorPad * selpad)
393 if (!selpad->cached_buffers)
396 GST_DEBUG_OBJECT (selpad, "Freeing cached buffers");
397 g_queue_free_full (selpad->cached_buffers,
398 (GDestroyNotify) gst_selector_pad_free_cached_buffer);
399 selpad->cached_buffers = NULL;
402 /* strictly get the linked pad from the sinkpad. If the pad is active we return
403 * the srcpad else we return NULL */
405 gst_selector_pad_iterate_linked_pads (GstPad * pad, GstObject * parent)
407 GstInputSelector *sel;
409 GstIterator *it = NULL;
412 sel = GST_INPUT_SELECTOR (parent);
414 otherpad = gst_input_selector_get_linked_pad (sel, pad, TRUE);
416 g_value_init (&val, GST_TYPE_PAD);
417 g_value_set_object (&val, otherpad);
418 it = gst_iterator_new_single (GST_TYPE_PAD, &val);
419 g_value_unset (&val);
420 gst_object_unref (otherpad);
427 gst_selector_pad_event (GstPad * pad, GstObject * parent, GstEvent * event)
431 gboolean new_tags = FALSE;
432 GstInputSelector *sel;
433 GstSelectorPad *selpad;
434 GstPad *prev_active_sinkpad;
435 GstPad *active_sinkpad;
437 sel = GST_INPUT_SELECTOR (parent);
438 selpad = GST_SELECTOR_PAD_CAST (pad);
439 GST_DEBUG_OBJECT (selpad, "received event %" GST_PTR_FORMAT, event);
441 GST_INPUT_SELECTOR_LOCK (sel);
442 prev_active_sinkpad =
443 sel->active_sinkpad ? gst_object_ref (sel->active_sinkpad) : NULL;
444 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
445 gst_object_ref (active_sinkpad);
446 GST_INPUT_SELECTOR_UNLOCK (sel);
448 if (prev_active_sinkpad != active_sinkpad) {
449 if (prev_active_sinkpad)
450 g_object_notify (G_OBJECT (prev_active_sinkpad), "active");
451 g_object_notify (G_OBJECT (active_sinkpad), "active");
452 g_object_notify (G_OBJECT (sel), "active-pad");
454 if (prev_active_sinkpad)
455 gst_object_unref (prev_active_sinkpad);
456 gst_object_unref (active_sinkpad);
458 GST_INPUT_SELECTOR_LOCK (sel);
459 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
461 /* only forward if we are dealing with the active sinkpad */
462 forward = (pad == active_sinkpad);
464 switch (GST_EVENT_TYPE (event)) {
465 case GST_EVENT_STREAM_START:{
468 if (!gst_event_parse_group_id (event, &group_id))
469 sel->have_group_id = FALSE;
472 case GST_EVENT_FLUSH_START:
473 /* Unblock the pad if it's waiting */
474 selpad->flushing = TRUE;
476 GST_INPUT_SELECTOR_BROADCAST (sel);
478 case GST_EVENT_FLUSH_STOP:
479 gst_selector_pad_reset (selpad);
481 case GST_EVENT_SEGMENT:
483 gst_event_copy_segment (event, &selpad->segment);
484 selpad->segment_seqnum = gst_event_get_seqnum (event);
486 GST_DEBUG_OBJECT (pad, "configured SEGMENT %" GST_SEGMENT_FORMAT,
492 GstTagList *tags, *oldtags, *newtags;
494 gst_event_parse_tag (event, &tags);
496 GST_OBJECT_LOCK (selpad);
497 oldtags = selpad->tags;
499 newtags = gst_tag_list_merge (oldtags, tags, GST_TAG_MERGE_REPLACE);
500 selpad->tags = newtags;
501 GST_OBJECT_UNLOCK (selpad);
504 gst_tag_list_unref (oldtags);
505 GST_DEBUG_OBJECT (pad, "received tags %" GST_PTR_FORMAT, newtags);
515 /* Wait until we're the active sink pad or we're flushing */
516 while (!sel->eos && !sel->flushing && !selpad->flushing)
517 GST_INPUT_SELECTOR_WAIT (sel);
519 /* Notify all waiting pads about going EOS now */
521 GST_INPUT_SELECTOR_BROADCAST (sel);
525 gst_event_unref (event);
528 /* prevent any further EOS event being pushed */
529 sel->eos_sent = TRUE;
532 selpad->eos_sent = TRUE;
534 GST_DEBUG_OBJECT (pad, "received EOS");
537 GstClockTime ts, dur;
539 GST_DEBUG_OBJECT (pad, "Received gap event: %" GST_PTR_FORMAT, event);
541 gst_event_parse_gap (event, &ts, &dur);
542 if (GST_CLOCK_TIME_IS_VALID (ts)) {
543 if (GST_CLOCK_TIME_IS_VALID (dur))
546 /* update the segment position */
547 GST_OBJECT_LOCK (pad);
548 selpad->segment.position = ts;
549 GST_OBJECT_UNLOCK (pad);
550 if (sel->sync_streams && active_sinkpad == pad)
551 GST_INPUT_SELECTOR_BROADCAST (sel);
559 GST_INPUT_SELECTOR_UNLOCK (sel);
561 g_object_notify (G_OBJECT (selpad), "tags");
564 GST_DEBUG_OBJECT (pad, "forwarding event");
565 res = gst_pad_push_event (sel->srcpad, event);
567 /* If we aren't forwarding the event because the pad is not the
568 * active_sinkpad, then set the flag on the pad
569 * that says a segment needs sending if/when that pad is activated.
570 * For all other cases, we send the event immediately, which makes
571 * sparse streams and other segment updates work correctly downstream.
573 if (GST_EVENT_IS_STICKY (event))
574 selpad->events_pending = TRUE;
575 gst_event_unref (event);
583 gst_selector_pad_query (GstPad * pad, GstObject * parent, GstQuery * query)
585 gboolean res = FALSE;
586 GstInputSelector *self = (GstInputSelector *) parent;
588 switch (GST_QUERY_TYPE (query)) {
590 /* always proxy caps query, regardless of active pad or not */
591 res = gst_pad_peer_query (self->srcpad, query);
593 case GST_QUERY_ALLOCATION:{
594 GstPad *active_sinkpad;
595 GstInputSelector *sel = GST_INPUT_SELECTOR (parent);
597 /* Only do the allocation query for the active sinkpad,
598 * after switching a reconfigure event is sent and upstream
599 * should reconfigure and do a new allocation query
601 if (GST_PAD_DIRECTION (pad) == GST_PAD_SINK) {
602 GST_INPUT_SELECTOR_LOCK (sel);
603 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
604 GST_INPUT_SELECTOR_UNLOCK (sel);
606 if (pad != active_sinkpad) {
614 res = gst_pad_query_default (pad, parent, query);
623 gst_input_selector_get_clipped_running_time (GstSegment * seg, GstBuffer * buf)
625 GstClockTime running_time;
627 running_time = GST_BUFFER_PTS (buf);
628 /* If possible try to get the running time at the end of the buffer */
629 if (GST_BUFFER_DURATION_IS_VALID (buf))
630 running_time += GST_BUFFER_DURATION (buf);
631 /* Only use the segment to convert to running time if the segment is
632 * in TIME format, otherwise do our best to try to sync */
633 if (GST_CLOCK_TIME_IS_VALID (seg->stop)) {
634 if (running_time > seg->stop) {
635 running_time = seg->stop;
638 return gst_segment_to_running_time (seg, GST_FORMAT_TIME, running_time);
641 /* must be called without the SELECTOR_LOCK, will wait until the running time
642 * of the active pad is after this pad or return TRUE when flushing */
644 gst_input_selector_wait_running_time (GstInputSelector * sel,
645 GstSelectorPad * selpad, GstBuffer * buf)
649 GST_DEBUG_OBJECT (selpad, "entering wait for buffer %p", buf);
651 /* If we have no valid timestamp we can't sync this buffer */
652 if (!GST_BUFFER_PTS_IS_VALID (buf)) {
653 GST_DEBUG_OBJECT (selpad, "leaving wait for buffer with "
654 "invalid timestamp");
658 seg = &selpad->segment;
661 * a) this is the active pad
662 * b) the pad or the selector is flushing
663 * c) the buffer running time is before the current running time
664 * (either active-seg or clock, depending on sync-mode)
667 GST_INPUT_SELECTOR_LOCK (sel);
669 GstPad *active_sinkpad;
670 GstSelectorPad *active_selpad;
672 gint64 cur_running_time;
673 GstClockTime running_time;
675 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
676 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
678 if (seg->format != GST_FORMAT_TIME) {
679 GST_DEBUG_OBJECT (selpad,
680 "Not waiting because we don't have a TIME segment");
681 GST_INPUT_SELECTOR_UNLOCK (sel);
685 running_time = gst_input_selector_get_clipped_running_time (seg, buf);
686 /* If this is outside the segment don't sync */
687 if (running_time == -1) {
688 GST_DEBUG_OBJECT (selpad,
689 "Not waiting because buffer is outside segment");
690 GST_INPUT_SELECTOR_UNLOCK (sel);
694 cur_running_time = GST_CLOCK_TIME_NONE;
695 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
696 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
698 GstClockTime base_time;
700 cur_running_time = gst_clock_get_time (clock);
701 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
702 if (base_time <= cur_running_time)
703 cur_running_time -= base_time;
705 cur_running_time = 0;
707 gst_object_unref (clock);
710 GstSegment *active_seg;
712 active_seg = &active_selpad->segment;
714 /* If the active segment is configured but not to time format
715 * we can't do any syncing at all */
716 if (active_seg->format != GST_FORMAT_TIME
717 && active_seg->format != GST_FORMAT_UNDEFINED) {
718 GST_DEBUG_OBJECT (selpad,
719 "Not waiting because active segment isn't in TIME format");
720 GST_INPUT_SELECTOR_UNLOCK (sel);
724 /* Get active pad's running time, if no configured segment yet keep at -1 */
725 if (active_seg->format == GST_FORMAT_TIME)
726 cur_running_time = gst_segment_to_running_time (active_seg,
727 GST_FORMAT_TIME, active_seg->position);
730 if (selpad != active_selpad && !sel->eos && !sel->flushing
731 && !selpad->flushing && (cur_running_time == GST_CLOCK_TIME_NONE
732 || running_time >= cur_running_time)) {
733 GST_DEBUG_OBJECT (selpad,
734 "Waiting for active streams to advance. %" GST_TIME_FORMAT " >= %"
735 GST_TIME_FORMAT, GST_TIME_ARGS (running_time),
736 GST_TIME_ARGS (cur_running_time));
737 GST_INPUT_SELECTOR_WAIT (sel);
739 GST_INPUT_SELECTOR_UNLOCK (sel);
744 /* Return TRUE if the selector or the pad is flushing */
745 return (sel->flushing || selpad->flushing);
749 forward_sticky_events (GstPad * sinkpad, GstEvent ** event, gpointer user_data)
751 GstInputSelector *sel = GST_INPUT_SELECTOR (user_data);
753 if (GST_EVENT_TYPE (*event) == GST_EVENT_SEGMENT) {
754 GstSegment *seg = &GST_SELECTOR_PAD (sinkpad)->segment;
757 e = gst_event_new_segment (seg);
758 gst_event_set_seqnum (e, GST_SELECTOR_PAD_CAST (sinkpad)->segment_seqnum);
760 gst_pad_push_event (sel->srcpad, e);
761 } else if (GST_EVENT_TYPE (*event) == GST_EVENT_STREAM_START
762 && !sel->have_group_id) {
764 gst_pad_get_sticky_event (sel->srcpad, GST_EVENT_STREAM_START, 0);
766 /* Only push stream-start once if not all our streams have a stream-id */
768 gst_pad_push_event (sel->srcpad, gst_event_ref (*event));
770 gst_event_unref (tmp);
773 gst_pad_push_event (sel->srcpad, gst_event_ref (*event));
779 #if DEBUG_CACHED_BUFFERS
781 gst_input_selector_debug_cached_buffers (GstInputSelector * sel)
785 if (gst_debug_category_get_threshold (input_selector_debug) < GST_LEVEL_DEBUG)
788 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = walk->next) {
789 GstSelectorPad *selpad;
793 selpad = GST_SELECTOR_PAD_CAST (walk->data);
794 if (!selpad->cached_buffers) {
795 GST_DEBUG_OBJECT (selpad, "Cached buffers timestamps: <none>");
799 timestamps = g_string_new ("Cached buffers timestamps:");
800 for (l = selpad->cached_buffers->head; l != NULL; l = l->next) {
801 GstSelectorPadCachedBuffer *cached_buffer = l->data;
803 g_string_append_printf (timestamps, " %" GST_TIME_FORMAT,
804 GST_TIME_ARGS (GST_BUFFER_PTS (cached_buffer->buffer)));
806 GST_DEBUG_OBJECT (selpad, "%s", timestamps->str);
807 g_string_free (timestamps, TRUE);
812 /* must be called with the SELECTOR_LOCK */
814 gst_input_selector_cleanup_old_cached_buffers (GstInputSelector * sel,
818 gint64 cur_running_time;
821 cur_running_time = GST_CLOCK_TIME_NONE;
822 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
823 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
825 GstClockTime base_time;
827 cur_running_time = gst_clock_get_time (clock);
828 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
829 if (base_time <= cur_running_time)
830 cur_running_time -= base_time;
832 cur_running_time = 0;
834 gst_object_unref (clock);
837 GstPad *active_sinkpad;
838 GstSelectorPad *active_selpad;
839 GstSegment *active_seg;
841 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
842 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
843 active_seg = &active_selpad->segment;
845 /* Get active pad's running time, if no configured segment yet keep at -1 */
846 if (active_seg->format == GST_FORMAT_TIME)
847 cur_running_time = gst_segment_to_running_time (active_seg,
848 GST_FORMAT_TIME, active_seg->position);
851 if (!GST_CLOCK_TIME_IS_VALID (cur_running_time))
854 GST_DEBUG_OBJECT (sel, "Cleaning up old cached buffers");
855 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
856 GstSelectorPad *selpad;
858 GstSelectorPadCachedBuffer *cached_buffer;
859 GSList *maybe_remove;
860 guint queue_position;
862 selpad = GST_SELECTOR_PAD_CAST (walk->data);
863 if (!selpad->cached_buffers)
866 seg = &selpad->segment;
870 while ((cached_buffer = g_queue_peek_nth (selpad->cached_buffers,
872 GstBuffer *buffer = cached_buffer->buffer;
873 GstClockTime running_time;
876 /* If we have no valid timestamp we can't sync this buffer */
877 if (!GST_BUFFER_PTS_IS_VALID (buffer)) {
878 maybe_remove = g_slist_append (maybe_remove, cached_buffer);
879 queue_position = g_slist_length (maybe_remove);
883 /* the buffer is still valid if its duration is valid and the
884 * timestamp + duration is >= time, or if its duration is invalid
885 * and the timestamp is >= time */
886 running_time = gst_input_selector_get_clipped_running_time (seg, buffer);
887 GST_DEBUG_OBJECT (selpad,
888 "checking if buffer %p running time=%" GST_TIME_FORMAT
889 " >= stream time=%" GST_TIME_FORMAT, buffer,
890 GST_TIME_ARGS (running_time), GST_TIME_ARGS (cur_running_time));
891 if (running_time >= cur_running_time) {
895 GST_DEBUG_OBJECT (selpad, "Removing old cached buffer %p", buffer);
896 g_queue_pop_nth (selpad->cached_buffers, queue_position);
897 gst_selector_pad_free_cached_buffer (cached_buffer);
899 for (l = maybe_remove; l != NULL; l = g_slist_next (l)) {
900 /* A buffer after some invalid buffers was removed, it means the invalid buffers
901 * are old, lets also remove them */
902 cached_buffer = l->data;
903 g_queue_remove (selpad->cached_buffers, cached_buffer);
904 gst_selector_pad_free_cached_buffer (cached_buffer);
907 g_slist_free (maybe_remove);
912 g_slist_free (maybe_remove);
915 if (g_queue_is_empty (selpad->cached_buffers)) {
916 g_queue_free (selpad->cached_buffers);
917 selpad->cached_buffers = NULL;
921 #if DEBUG_CACHED_BUFFERS
922 gst_input_selector_debug_cached_buffers (sel);
927 gst_selector_pad_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
929 GstInputSelector *sel;
931 GstPad *active_sinkpad;
932 GstPad *prev_active_sinkpad = NULL;
933 GstSelectorPad *selpad;
935 sel = GST_INPUT_SELECTOR (parent);
936 selpad = GST_SELECTOR_PAD_CAST (pad);
938 GST_DEBUG_OBJECT (selpad,
939 "entering chain for buf %p with timestamp %" GST_TIME_FORMAT, buf,
940 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
942 GST_INPUT_SELECTOR_LOCK (sel);
945 GST_INPUT_SELECTOR_UNLOCK (sel);
950 GST_INPUT_SELECTOR_UNLOCK (sel);
954 GST_LOG_OBJECT (pad, "getting active pad");
956 prev_active_sinkpad =
957 sel->active_sinkpad ? gst_object_ref (sel->active_sinkpad) : NULL;
958 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
960 /* In sync mode wait until the active pad has advanced
961 * after the running time of the current buffer */
962 if (sel->sync_streams) {
963 /* call chain for each cached buffer if we are not the active pad
964 * or if we are the active pad but didn't push anything yet. */
965 if (active_sinkpad != pad || !selpad->pushed) {
966 /* no need to check for sel->cache_buffers as selpad->cached_buffers
967 * will only be valid if cache_buffers is TRUE */
968 if (selpad->cached_buffers && !selpad->sending_cached_buffers) {
969 GstSelectorPadCachedBuffer *cached_buffer;
970 GstSegment saved_segment;
972 saved_segment = selpad->segment;
974 selpad->sending_cached_buffers = TRUE;
975 while (!sel->eos && !sel->flushing && !selpad->flushing &&
976 (cached_buffer = g_queue_pop_head (selpad->cached_buffers))) {
977 GST_DEBUG_OBJECT (pad, "Cached buffers found, "
978 "invoking chain for cached buffer %p", cached_buffer->buffer);
980 selpad->segment = cached_buffer->segment;
981 selpad->events_pending = TRUE;
982 GST_INPUT_SELECTOR_UNLOCK (sel);
983 gst_selector_pad_chain (pad, parent, cached_buffer->buffer);
984 GST_INPUT_SELECTOR_LOCK (sel);
986 /* We just passed the ownership of the buffer to the chain function */
987 cached_buffer->buffer = NULL;
988 gst_selector_pad_free_cached_buffer (cached_buffer);
990 /* we may have cleaned up the queue in the meantime because of
992 if (!selpad->cached_buffers) {
996 selpad->sending_cached_buffers = FALSE;
998 /* all cached buffers sent, restore segment for current buffer */
999 selpad->segment = saved_segment;
1000 selpad->events_pending = TRUE;
1002 /* Might have changed while calling chain for cached buffers */
1003 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1007 if (active_sinkpad != pad) {
1008 GST_INPUT_SELECTOR_UNLOCK (sel);
1009 if (gst_input_selector_wait_running_time (sel, selpad, buf))
1011 GST_INPUT_SELECTOR_LOCK (sel);
1014 /* Might have changed while waiting */
1015 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1019 GST_INPUT_SELECTOR_UNLOCK (sel);
1023 /* update the segment on the srcpad */
1024 if (GST_BUFFER_PTS_IS_VALID (buf)) {
1025 GstClockTime start_time = GST_BUFFER_PTS (buf);
1027 GST_LOG_OBJECT (pad, "received start time %" GST_TIME_FORMAT,
1028 GST_TIME_ARGS (start_time));
1029 if (GST_BUFFER_DURATION_IS_VALID (buf))
1030 GST_LOG_OBJECT (pad, "received end time %" GST_TIME_FORMAT,
1031 GST_TIME_ARGS (start_time + GST_BUFFER_DURATION (buf)));
1033 GST_OBJECT_LOCK (pad);
1034 selpad->segment.position = start_time;
1035 GST_OBJECT_UNLOCK (pad);
1038 /* Ignore buffers from pads except the selected one */
1039 if (pad != active_sinkpad)
1042 /* Tell all non-active pads that we advanced the running time */
1043 if (sel->sync_streams)
1044 GST_INPUT_SELECTOR_BROADCAST (sel);
1046 GST_INPUT_SELECTOR_UNLOCK (sel);
1048 if (prev_active_sinkpad != active_sinkpad) {
1049 if (prev_active_sinkpad)
1050 g_object_notify (G_OBJECT (prev_active_sinkpad), "active");
1051 g_object_notify (G_OBJECT (active_sinkpad), "active");
1052 g_object_notify (G_OBJECT (sel), "active-pad");
1055 /* if we have a pending events, push them now */
1056 if (G_UNLIKELY (prev_active_sinkpad != active_sinkpad
1057 || selpad->events_pending)) {
1058 gst_pad_sticky_events_foreach (GST_PAD_CAST (selpad), forward_sticky_events,
1060 selpad->events_pending = FALSE;
1063 if (prev_active_sinkpad) {
1064 gst_object_unref (prev_active_sinkpad);
1065 prev_active_sinkpad = NULL;
1068 if (selpad->discont) {
1069 buf = gst_buffer_make_writable (buf);
1071 GST_DEBUG_OBJECT (pad, "Marking discont buffer %p", buf);
1072 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
1073 selpad->discont = FALSE;
1077 GST_LOG_OBJECT (pad, "Forwarding buffer %p with timestamp %" GST_TIME_FORMAT,
1078 buf, GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
1080 /* Only make the buffer read-only when necessary */
1081 if (sel->sync_streams && sel->cache_buffers)
1082 buf = gst_buffer_ref (buf);
1083 res = gst_pad_push (sel->srcpad, buf);
1084 GST_LOG_OBJECT (pad, "Buffer %p forwarded result=%d", buf, res);
1086 GST_INPUT_SELECTOR_LOCK (sel);
1088 if (sel->sync_streams && sel->cache_buffers) {
1089 /* Might have changed while pushing */
1090 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1091 /* only set pad to pushed if we are still the active pad */
1092 if (active_sinkpad == pad)
1093 selpad->pushed = TRUE;
1095 /* cache buffer as we may need it again if we change pads */
1096 gst_selector_pad_cache_buffer (selpad, buf);
1097 gst_input_selector_cleanup_old_cached_buffers (sel, pad);
1099 selpad->pushed = TRUE;
1101 GST_INPUT_SELECTOR_UNLOCK (sel);
1105 if (prev_active_sinkpad)
1106 gst_object_unref (prev_active_sinkpad);
1107 prev_active_sinkpad = NULL;
1111 /* dropped buffers */
1114 gboolean active_pad_pushed = GST_SELECTOR_PAD_CAST (active_sinkpad)->pushed;
1116 GST_DEBUG_OBJECT (pad, "Pad not active, discard buffer %p", buf);
1117 /* when we drop a buffer, we're creating a discont on this pad */
1118 selpad->discont = TRUE;
1119 GST_INPUT_SELECTOR_UNLOCK (sel);
1120 gst_buffer_unref (buf);
1122 /* figure out what to return upstream */
1123 GST_OBJECT_LOCK (selpad);
1124 if (selpad->always_ok || !active_pad_pushed)
1127 res = GST_FLOW_NOT_LINKED;
1128 GST_OBJECT_UNLOCK (selpad);
1134 GST_DEBUG_OBJECT (pad, "We are flushing, discard buffer %p", buf);
1135 gst_buffer_unref (buf);
1136 res = GST_FLOW_FLUSHING;
1141 GST_DEBUG_OBJECT (pad, "We are eos, discard buffer %p", buf);
1142 gst_buffer_unref (buf);
1148 static void gst_input_selector_dispose (GObject * object);
1149 static void gst_input_selector_finalize (GObject * object);
1151 static void gst_input_selector_set_property (GObject * object,
1152 guint prop_id, const GValue * value, GParamSpec * pspec);
1153 static void gst_input_selector_get_property (GObject * object,
1154 guint prop_id, GValue * value, GParamSpec * pspec);
1156 static GstPad *gst_input_selector_request_new_pad (GstElement * element,
1157 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps);
1158 static void gst_input_selector_release_pad (GstElement * element, GstPad * pad);
1160 static GstStateChangeReturn gst_input_selector_change_state (GstElement *
1161 element, GstStateChange transition);
1163 static gboolean gst_input_selector_event (GstPad * pad, GstObject * parent,
1167 GST_DEBUG_CATEGORY_INIT (input_selector_debug, \
1168 "input-selector", 0, "An input stream selector element");
1169 #define gst_input_selector_parent_class parent_class
1170 G_DEFINE_TYPE_WITH_CODE (GstInputSelector, gst_input_selector, GST_TYPE_ELEMENT,
1174 gst_input_selector_class_init (GstInputSelectorClass * klass)
1176 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
1177 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
1179 gobject_class->dispose = gst_input_selector_dispose;
1180 gobject_class->finalize = gst_input_selector_finalize;
1182 gobject_class->set_property = gst_input_selector_set_property;
1183 gobject_class->get_property = gst_input_selector_get_property;
1185 g_object_class_install_property (gobject_class, PROP_N_PADS,
1186 g_param_spec_uint ("n-pads", "Number of Pads",
1187 "The number of sink pads", 0, G_MAXUINT, 0,
1188 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
1190 g_object_class_install_property (gobject_class, PROP_ACTIVE_PAD,
1191 g_param_spec_object ("active-pad", "Active pad",
1192 "The currently active sink pad", GST_TYPE_PAD,
1193 G_PARAM_READWRITE | GST_PARAM_MUTABLE_PLAYING |
1194 G_PARAM_STATIC_STRINGS));
1197 * GstInputSelector:sync-streams
1199 * If set to %TRUE all inactive streams will be synced to the
1200 * running time of the active stream or to the current clock.
1202 * To make sure no buffers are dropped by input-selector
1203 * that might be needed when switching the active pad,
1204 * sync-mode should be set to "clock" and cache-buffers to TRUE.
1206 g_object_class_install_property (gobject_class, PROP_SYNC_STREAMS,
1207 g_param_spec_boolean ("sync-streams", "Sync Streams",
1208 "Synchronize inactive streams to the running time of the active "
1209 "stream or to the current clock",
1210 DEFAULT_SYNC_STREAMS,
1211 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1212 GST_PARAM_MUTABLE_READY));
1215 * GstInputSelector:sync-mode
1217 * Select how input-selector will sync buffers when in sync-streams mode.
1219 * Note that when using the "active-segment" mode, the "active-segment" may
1220 * be ahead of current clock time when switching the active pad, as the current
1221 * active pad may have pushed more buffers than what was displayed/consumed,
1222 * which may cause delays and some missing buffers.
1224 g_object_class_install_property (gobject_class, PROP_SYNC_MODE,
1225 g_param_spec_enum ("sync-mode", "Sync mode",
1226 "Behavior in sync-streams mode", GST_TYPE_INPUT_SELECTOR_SYNC_MODE,
1228 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1229 GST_PARAM_MUTABLE_READY));
1232 * GstInputSelector:cache-buffers
1234 * If set to %TRUE and GstInputSelector:sync-streams is also set to %TRUE,
1235 * the active pad will cache the buffers still considered valid (after current
1236 * running time, see sync-mode) to avoid missing frames if/when the pad is
1239 * The active pad may push more buffers than what is currently displayed/consumed
1240 * and when changing pads those buffers will be discarded and the only way to
1241 * reactivate that pad without loosing the already consumed buffers is to enable cache.
1243 g_object_class_install_property (gobject_class, PROP_CACHE_BUFFERS,
1244 g_param_spec_boolean ("cache-buffers", "Cache Buffers",
1245 "Cache buffers for active-pad",
1246 DEFAULT_CACHE_BUFFERS,
1247 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1248 GST_PARAM_MUTABLE_READY));
1250 gst_element_class_set_static_metadata (gstelement_class, "Input selector",
1251 "Generic", "N-to-1 input stream selector",
1252 "Julien Moutte <julien@moutte.net>, "
1253 "Jan Schmidt <thaytan@mad.scientist.com>, "
1254 "Wim Taymans <wim.taymans@gmail.com>");
1255 gst_element_class_add_pad_template (gstelement_class,
1256 gst_static_pad_template_get (&gst_input_selector_sink_factory));
1257 gst_element_class_add_pad_template (gstelement_class,
1258 gst_static_pad_template_get (&gst_input_selector_src_factory));
1260 gstelement_class->request_new_pad = gst_input_selector_request_new_pad;
1261 gstelement_class->release_pad = gst_input_selector_release_pad;
1262 gstelement_class->change_state = gst_input_selector_change_state;
1266 gst_input_selector_init (GstInputSelector * sel)
1268 sel->srcpad = gst_pad_new ("src", GST_PAD_SRC);
1269 gst_pad_set_iterate_internal_links_function (sel->srcpad,
1270 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1271 gst_pad_set_event_function (sel->srcpad,
1272 GST_DEBUG_FUNCPTR (gst_input_selector_event));
1273 GST_OBJECT_FLAG_SET (sel->srcpad, GST_PAD_FLAG_PROXY_CAPS);
1274 gst_element_add_pad (GST_ELEMENT (sel), sel->srcpad);
1275 /* sinkpad management */
1276 sel->active_sinkpad = NULL;
1278 sel->sync_streams = DEFAULT_SYNC_STREAMS;
1279 sel->have_group_id = TRUE;
1281 g_mutex_init (&sel->lock);
1282 g_cond_init (&sel->cond);
1285 /* lets give a change for downstream to do something on
1286 * active-pad change before we start pushing new buffers */
1287 g_signal_connect_data (sel, "notify::active-pad",
1288 (GCallback) gst_input_selector_active_pad_changed, NULL,
1289 NULL, G_CONNECT_AFTER);
1293 gst_input_selector_dispose (GObject * object)
1295 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1297 if (sel->active_sinkpad) {
1298 gst_object_unref (sel->active_sinkpad);
1299 sel->active_sinkpad = NULL;
1301 G_OBJECT_CLASS (parent_class)->dispose (object);
1305 gst_input_selector_finalize (GObject * object)
1307 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1309 g_mutex_clear (&sel->lock);
1310 g_cond_clear (&sel->cond);
1312 G_OBJECT_CLASS (parent_class)->finalize (object);
1315 /* this function must be called with the SELECTOR_LOCK. It returns TRUE when the
1316 * active pad changed. */
1318 gst_input_selector_set_active_pad (GstInputSelector * self, GstPad * pad)
1320 GstSelectorPad *old, *new;
1321 GstPad **active_pad_p;
1323 if (pad == self->active_sinkpad)
1326 old = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
1327 new = GST_SELECTOR_PAD_CAST (pad);
1329 GST_DEBUG_OBJECT (self, "setting active pad to %s:%s",
1330 GST_DEBUG_PAD_NAME (new));
1333 old->pushed = FALSE;
1335 new->pushed = FALSE;
1337 /* Send a new SEGMENT event on the new pad next */
1338 if (old != new && new)
1339 new->events_pending = TRUE;
1341 active_pad_p = &self->active_sinkpad;
1342 gst_object_replace ((GstObject **) active_pad_p, GST_OBJECT_CAST (pad));
1344 if (old && old != new)
1345 gst_pad_push_event (GST_PAD_CAST (old), gst_event_new_reconfigure ());
1347 gst_pad_push_event (GST_PAD_CAST (new), gst_event_new_reconfigure ());
1349 GST_DEBUG_OBJECT (self, "New active pad is %" GST_PTR_FORMAT,
1350 self->active_sinkpad);
1352 if (old != new && new && new->eos && !new->eos_sent) {
1354 GST_INPUT_SELECTOR_BROADCAST (self);
1361 gst_input_selector_set_property (GObject * object, guint prop_id,
1362 const GValue * value, GParamSpec * pspec)
1364 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1367 case PROP_ACTIVE_PAD:
1371 pad = g_value_get_object (value);
1373 GST_INPUT_SELECTOR_LOCK (sel);
1375 #if DEBUG_CACHED_BUFFERS
1376 gst_input_selector_debug_cached_buffers (sel);
1379 gst_input_selector_set_active_pad (sel, pad);
1381 #if DEBUG_CACHED_BUFFERS
1382 gst_input_selector_debug_cached_buffers (sel);
1385 GST_INPUT_SELECTOR_UNLOCK (sel);
1388 case PROP_SYNC_STREAMS:
1389 GST_INPUT_SELECTOR_LOCK (sel);
1390 sel->sync_streams = g_value_get_boolean (value);
1391 GST_INPUT_SELECTOR_UNLOCK (sel);
1393 case PROP_SYNC_MODE:
1394 GST_INPUT_SELECTOR_LOCK (sel);
1395 sel->sync_mode = g_value_get_enum (value);
1396 GST_INPUT_SELECTOR_UNLOCK (sel);
1398 case PROP_CACHE_BUFFERS:
1399 GST_INPUT_SELECTOR_LOCK (object);
1400 sel->cache_buffers = g_value_get_boolean (value);
1401 GST_INPUT_SELECTOR_UNLOCK (object);
1404 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1410 gst_input_selector_active_pad_changed (GstInputSelector * sel,
1411 GParamSpec * pspec, gpointer user_data)
1413 /* Wake up all non-active pads in sync mode, they might be
1414 * the active pad now */
1415 if (sel->sync_streams)
1416 GST_INPUT_SELECTOR_BROADCAST (sel);
1420 gst_input_selector_get_property (GObject * object, guint prop_id,
1421 GValue * value, GParamSpec * pspec)
1423 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1427 GST_INPUT_SELECTOR_LOCK (object);
1428 g_value_set_uint (value, sel->n_pads);
1429 GST_INPUT_SELECTOR_UNLOCK (object);
1431 case PROP_ACTIVE_PAD:
1432 GST_INPUT_SELECTOR_LOCK (object);
1433 g_value_set_object (value, sel->active_sinkpad);
1434 GST_INPUT_SELECTOR_UNLOCK (object);
1436 case PROP_SYNC_STREAMS:
1437 GST_INPUT_SELECTOR_LOCK (object);
1438 g_value_set_boolean (value, sel->sync_streams);
1439 GST_INPUT_SELECTOR_UNLOCK (object);
1441 case PROP_SYNC_MODE:
1442 GST_INPUT_SELECTOR_LOCK (object);
1443 g_value_set_enum (value, sel->sync_mode);
1444 GST_INPUT_SELECTOR_UNLOCK (object);
1446 case PROP_CACHE_BUFFERS:
1447 GST_INPUT_SELECTOR_LOCK (object);
1448 g_value_set_boolean (value, sel->cache_buffers);
1449 GST_INPUT_SELECTOR_UNLOCK (object);
1452 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1458 gst_input_selector_get_linked_pad (GstInputSelector * sel, GstPad * pad,
1461 GstPad *otherpad = NULL;
1463 GST_INPUT_SELECTOR_LOCK (sel);
1464 if (pad == sel->srcpad)
1465 otherpad = sel->active_sinkpad;
1466 else if (pad == sel->active_sinkpad || !strict)
1467 otherpad = sel->srcpad;
1469 gst_object_ref (otherpad);
1470 GST_INPUT_SELECTOR_UNLOCK (sel);
1476 gst_input_selector_event (GstPad * pad, GstObject * parent, GstEvent * event)
1478 GstInputSelector *sel;
1479 gboolean result = FALSE;
1481 gboolean done = FALSE;
1482 GValue item = { 0, };
1484 GList *pushed_pads = NULL;
1486 sel = GST_INPUT_SELECTOR (parent);
1487 /* Send upstream events to all sinkpads */
1488 iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1490 /* This is now essentially a copy of gst_pad_event_default_dispatch
1491 * with a different iterator */
1493 switch (gst_iterator_next (iter, &item)) {
1494 case GST_ITERATOR_OK:
1495 eventpad = g_value_get_object (&item);
1497 /* if already pushed, skip */
1498 if (g_list_find (pushed_pads, eventpad)) {
1499 g_value_reset (&item);
1503 gst_event_ref (event);
1504 result |= gst_pad_push_event (eventpad, event);
1506 g_value_reset (&item);
1508 case GST_ITERATOR_RESYNC:
1509 /* We don't reset the result here because we don't push the event
1510 * again on pads that got the event already and because we need
1511 * to consider the result of the previous pushes */
1512 gst_iterator_resync (iter);
1514 case GST_ITERATOR_ERROR:
1515 GST_ERROR_OBJECT (pad, "Could not iterate over sinkpads");
1518 case GST_ITERATOR_DONE:
1523 g_value_unset (&item);
1524 gst_iterator_free (iter);
1526 g_list_free (pushed_pads);
1528 gst_event_unref (event);
1533 /* check if the pad is the active sinkpad */
1534 static inline gboolean
1535 gst_input_selector_is_active_sinkpad (GstInputSelector * sel, GstPad * pad)
1539 GST_INPUT_SELECTOR_LOCK (sel);
1540 res = (pad == sel->active_sinkpad);
1541 GST_INPUT_SELECTOR_UNLOCK (sel);
1546 /* Get or create the active sinkpad, must be called with SELECTOR_LOCK */
1548 gst_input_selector_get_active_sinkpad (GstInputSelector * sel)
1550 GstPad *active_sinkpad;
1552 active_sinkpad = sel->active_sinkpad;
1553 if (active_sinkpad == NULL) {
1554 GValue item = G_VALUE_INIT;
1555 GstIterator *iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1556 GstIteratorResult ires;
1558 while ((ires = gst_iterator_next (iter, &item)) == GST_ITERATOR_RESYNC)
1559 gst_iterator_resync (iter);
1560 if (ires == GST_ITERATOR_OK) {
1561 /* If no pad is currently selected, we return the first usable pad to
1562 * guarantee consistency */
1564 active_sinkpad = sel->active_sinkpad = g_value_dup_object (&item);
1565 g_value_reset (&item);
1566 GST_DEBUG_OBJECT (sel, "Activating pad %s:%s",
1567 GST_DEBUG_PAD_NAME (active_sinkpad));
1569 GST_WARNING_OBJECT (sel, "Couldn't find a default sink pad");
1570 gst_iterator_free (iter);
1573 return active_sinkpad;
1577 gst_input_selector_request_new_pad (GstElement * element,
1578 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps)
1580 GstInputSelector *sel;
1582 GstPad *sinkpad = NULL;
1584 g_return_val_if_fail (templ->direction == GST_PAD_SINK, NULL);
1586 sel = GST_INPUT_SELECTOR (element);
1588 GST_INPUT_SELECTOR_LOCK (sel);
1590 GST_LOG_OBJECT (sel, "Creating new pad sink_%u", sel->padcount);
1591 name = g_strdup_printf ("sink_%u", sel->padcount++);
1592 sinkpad = g_object_new (GST_TYPE_SELECTOR_PAD,
1593 "name", name, "direction", templ->direction, "template", templ, NULL);
1598 gst_pad_set_event_function (sinkpad,
1599 GST_DEBUG_FUNCPTR (gst_selector_pad_event));
1600 gst_pad_set_query_function (sinkpad,
1601 GST_DEBUG_FUNCPTR (gst_selector_pad_query));
1602 gst_pad_set_chain_function (sinkpad,
1603 GST_DEBUG_FUNCPTR (gst_selector_pad_chain));
1604 gst_pad_set_iterate_internal_links_function (sinkpad,
1605 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1607 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_CAPS);
1608 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_ALLOCATION);
1609 gst_pad_set_active (sinkpad, TRUE);
1610 gst_element_add_pad (GST_ELEMENT (sel), sinkpad);
1611 GST_INPUT_SELECTOR_UNLOCK (sel);
1617 gst_input_selector_release_pad (GstElement * element, GstPad * pad)
1619 GstInputSelector *sel;
1621 sel = GST_INPUT_SELECTOR (element);
1622 GST_LOG_OBJECT (sel, "Releasing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1624 GST_INPUT_SELECTOR_LOCK (sel);
1625 /* if the pad was the active pad, makes us select a new one */
1626 if (sel->active_sinkpad == pad) {
1627 GST_DEBUG_OBJECT (sel, "Deactivating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1628 gst_object_unref (sel->active_sinkpad);
1629 sel->active_sinkpad = NULL;
1632 GST_INPUT_SELECTOR_UNLOCK (sel);
1634 gst_pad_set_active (pad, FALSE);
1635 gst_element_remove_pad (GST_ELEMENT (sel), pad);
1639 gst_input_selector_reset (GstInputSelector * sel)
1643 GST_INPUT_SELECTOR_LOCK (sel);
1644 /* clear active pad */
1645 if (sel->active_sinkpad) {
1646 gst_object_unref (sel->active_sinkpad);
1647 sel->active_sinkpad = NULL;
1649 sel->eos_sent = FALSE;
1651 /* reset each of our sinkpads state */
1652 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
1653 GstSelectorPad *selpad = GST_SELECTOR_PAD_CAST (walk->data);
1655 gst_selector_pad_reset (selpad);
1658 gst_tag_list_unref (selpad->tags);
1659 selpad->tags = NULL;
1662 sel->have_group_id = TRUE;
1663 GST_INPUT_SELECTOR_UNLOCK (sel);
1666 static GstStateChangeReturn
1667 gst_input_selector_change_state (GstElement * element,
1668 GstStateChange transition)
1670 GstInputSelector *self = GST_INPUT_SELECTOR (element);
1671 GstStateChangeReturn result;
1673 switch (transition) {
1674 case GST_STATE_CHANGE_READY_TO_PAUSED:
1675 GST_INPUT_SELECTOR_LOCK (self);
1677 self->flushing = FALSE;
1678 GST_INPUT_SELECTOR_UNLOCK (self);
1680 case GST_STATE_CHANGE_PAUSED_TO_READY:
1681 /* first unlock before we call the parent state change function, which
1682 * tries to acquire the stream lock when going to ready. */
1683 GST_INPUT_SELECTOR_LOCK (self);
1685 self->flushing = TRUE;
1686 GST_INPUT_SELECTOR_BROADCAST (self);
1687 GST_INPUT_SELECTOR_UNLOCK (self);
1693 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1695 switch (transition) {
1696 case GST_STATE_CHANGE_PAUSED_TO_READY:
1697 gst_input_selector_reset (self);