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 GstClockTime position; /* the current position in the segment */
177 GstSegment segment; /* the current segment on the pad */
178 guint32 segment_seqnum; /* sequence number of the current segment */
180 gboolean events_pending; /* TRUE if sticky events need to be updated */
182 gboolean sending_cached_buffers;
183 GQueue *cached_buffers;
186 struct _GstSelectorPadCachedBuffer
192 struct _GstSelectorPadClass
197 GType gst_selector_pad_get_type (void);
198 static void gst_selector_pad_finalize (GObject * object);
199 static void gst_selector_pad_get_property (GObject * object,
200 guint prop_id, GValue * value, GParamSpec * pspec);
201 static void gst_selector_pad_set_property (GObject * object,
202 guint prop_id, const GValue * value, GParamSpec * pspec);
204 static gint64 gst_selector_pad_get_running_time (GstSelectorPad * pad);
205 static void gst_selector_pad_reset (GstSelectorPad * pad);
206 static gboolean gst_selector_pad_event (GstPad * pad, GstObject * parent,
208 static gboolean gst_selector_pad_query (GstPad * pad, GstObject * parent,
210 static GstIterator *gst_selector_pad_iterate_linked_pads (GstPad * pad,
212 static GstFlowReturn gst_selector_pad_chain (GstPad * pad, GstObject * parent,
214 static void gst_selector_pad_cache_buffer (GstSelectorPad * selpad,
216 static void gst_selector_pad_free_cached_buffers (GstSelectorPad * selpad);
218 G_DEFINE_TYPE (GstSelectorPad, gst_selector_pad, GST_TYPE_PAD);
221 gst_selector_pad_class_init (GstSelectorPadClass * klass)
223 GObjectClass *gobject_class;
225 gobject_class = (GObjectClass *) klass;
227 gobject_class->finalize = gst_selector_pad_finalize;
229 gobject_class->get_property = gst_selector_pad_get_property;
230 gobject_class->set_property = gst_selector_pad_set_property;
232 g_object_class_install_property (gobject_class, PROP_PAD_RUNNING_TIME,
233 g_param_spec_int64 ("running-time", "Running time",
234 "Running time of stream on pad", 0, G_MAXINT64, 0,
235 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
236 g_object_class_install_property (gobject_class, PROP_PAD_TAGS,
237 g_param_spec_boxed ("tags", "Tags",
238 "The currently active tags on the pad", GST_TYPE_TAG_LIST,
239 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
240 g_object_class_install_property (gobject_class, PROP_PAD_ACTIVE,
241 g_param_spec_boolean ("active", "Active",
242 "If the pad is currently active", FALSE,
243 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
244 /* FIXME: better property name? */
245 g_object_class_install_property (gobject_class, PROP_PAD_ALWAYS_OK,
246 g_param_spec_boolean ("always-ok", "Always OK",
247 "Make an inactive pad return OK instead of NOT_LINKED",
248 DEFAULT_PAD_ALWAYS_OK, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
252 gst_selector_pad_init (GstSelectorPad * pad)
254 pad->always_ok = DEFAULT_PAD_ALWAYS_OK;
255 gst_selector_pad_reset (pad);
259 gst_selector_pad_finalize (GObject * object)
263 pad = GST_SELECTOR_PAD_CAST (object);
266 gst_tag_list_unref (pad->tags);
267 gst_selector_pad_free_cached_buffers (pad);
269 G_OBJECT_CLASS (gst_selector_pad_parent_class)->finalize (object);
273 gst_selector_pad_set_property (GObject * object, guint prop_id,
274 const GValue * value, GParamSpec * pspec)
276 GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
279 case PROP_PAD_ALWAYS_OK:
280 GST_OBJECT_LOCK (object);
281 spad->always_ok = g_value_get_boolean (value);
282 GST_OBJECT_UNLOCK (object);
285 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
291 gst_selector_pad_get_property (GObject * object, guint prop_id,
292 GValue * value, GParamSpec * pspec)
294 GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
297 case PROP_PAD_RUNNING_TIME:
298 g_value_set_int64 (value, gst_selector_pad_get_running_time (spad));
301 GST_OBJECT_LOCK (object);
302 g_value_set_boxed (value, spad->tags);
303 GST_OBJECT_UNLOCK (object);
305 case PROP_PAD_ACTIVE:
307 GstInputSelector *sel;
309 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (spad));
311 g_value_set_boolean (value, gst_input_selector_is_active_sinkpad (sel,
312 GST_PAD_CAST (spad)));
313 gst_object_unref (sel);
315 g_value_set_boolean (value, FALSE);
319 case PROP_PAD_ALWAYS_OK:
320 GST_OBJECT_LOCK (object);
321 g_value_set_boolean (value, spad->always_ok);
322 GST_OBJECT_UNLOCK (object);
325 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
331 gst_selector_pad_get_running_time (GstSelectorPad * pad)
335 GST_OBJECT_LOCK (pad);
337 guint64 position = pad->position;
338 GstFormat format = pad->segment.format;
340 ret = gst_segment_to_running_time (&pad->segment, format, position);
342 GST_OBJECT_UNLOCK (pad);
344 GST_DEBUG_OBJECT (pad, "running time: %" GST_TIME_FORMAT
345 " segment: %" GST_SEGMENT_FORMAT, GST_TIME_ARGS (ret), &pad->segment);
350 /* must be called with the SELECTOR_LOCK */
352 gst_selector_pad_reset (GstSelectorPad * pad)
354 GST_OBJECT_LOCK (pad);
358 pad->eos_sent = FALSE;
359 pad->events_pending = FALSE;
360 pad->discont = FALSE;
361 pad->flushing = FALSE;
362 pad->position = GST_CLOCK_TIME_NONE;
363 gst_segment_init (&pad->segment, GST_FORMAT_UNDEFINED);
364 pad->sending_cached_buffers = FALSE;
365 gst_selector_pad_free_cached_buffers (pad);
366 GST_OBJECT_UNLOCK (pad);
369 static GstSelectorPadCachedBuffer *
370 gst_selector_pad_new_cached_buffer (GstSelectorPad * selpad, GstBuffer * buffer)
372 GstSelectorPadCachedBuffer *cached_buffer =
373 g_slice_new (GstSelectorPadCachedBuffer);
374 cached_buffer->buffer = buffer;
375 cached_buffer->segment = selpad->segment;
376 return cached_buffer;
380 gst_selector_pad_free_cached_buffer (GstSelectorPadCachedBuffer * cached_buffer)
382 gst_buffer_unref (cached_buffer->buffer);
383 g_slice_free (GstSelectorPadCachedBuffer, cached_buffer);
386 /* must be called with the SELECTOR_LOCK */
388 gst_selector_pad_cache_buffer (GstSelectorPad * selpad, GstBuffer * buffer)
390 if (selpad->segment.format != GST_FORMAT_TIME) {
391 GST_DEBUG_OBJECT (selpad, "Buffer %p with segment not in time format, "
392 "not caching", buffer);
396 GST_DEBUG_OBJECT (selpad, "Caching buffer %p", buffer);
397 if (!selpad->cached_buffers)
398 selpad->cached_buffers = g_queue_new ();
399 g_queue_push_tail (selpad->cached_buffers,
400 gst_selector_pad_new_cached_buffer (selpad, buffer));
403 /* must be called with the SELECTOR_LOCK */
405 gst_selector_pad_free_cached_buffers (GstSelectorPad * selpad)
407 GstSelectorPadCachedBuffer *cached_buffer;
409 if (!selpad->cached_buffers)
412 GST_DEBUG_OBJECT (selpad, "Freeing cached buffers");
413 while ((cached_buffer = g_queue_pop_head (selpad->cached_buffers)))
414 gst_selector_pad_free_cached_buffer (cached_buffer);
415 g_queue_free (selpad->cached_buffers);
416 selpad->cached_buffers = NULL;
419 /* strictly get the linked pad from the sinkpad. If the pad is active we return
420 * the srcpad else we return NULL */
422 gst_selector_pad_iterate_linked_pads (GstPad * pad, GstObject * parent)
424 GstInputSelector *sel;
426 GstIterator *it = NULL;
429 sel = GST_INPUT_SELECTOR (parent);
431 otherpad = gst_input_selector_get_linked_pad (sel, pad, TRUE);
433 g_value_init (&val, GST_TYPE_PAD);
434 g_value_set_object (&val, otherpad);
435 it = gst_iterator_new_single (GST_TYPE_PAD, &val);
436 g_value_unset (&val);
437 gst_object_unref (otherpad);
444 gst_selector_pad_event (GstPad * pad, GstObject * parent, GstEvent * event)
448 gboolean new_tags = FALSE;
449 GstInputSelector *sel;
450 GstSelectorPad *selpad;
451 GstPad *prev_active_sinkpad;
452 GstPad *active_sinkpad;
454 sel = GST_INPUT_SELECTOR (parent);
455 selpad = GST_SELECTOR_PAD_CAST (pad);
456 GST_DEBUG_OBJECT (selpad, "received event %" GST_PTR_FORMAT, event);
458 GST_INPUT_SELECTOR_LOCK (sel);
459 prev_active_sinkpad =
460 sel->active_sinkpad ? gst_object_ref (sel->active_sinkpad) : NULL;
461 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
462 GST_INPUT_SELECTOR_UNLOCK (sel);
464 if (prev_active_sinkpad != active_sinkpad) {
465 if (prev_active_sinkpad)
466 g_object_notify (G_OBJECT (prev_active_sinkpad), "active");
467 g_object_notify (G_OBJECT (active_sinkpad), "active");
468 g_object_notify (G_OBJECT (sel), "active-pad");
470 if (prev_active_sinkpad)
471 gst_object_unref (prev_active_sinkpad);
473 GST_INPUT_SELECTOR_LOCK (sel);
474 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
476 /* only forward if we are dealing with the active sinkpad */
477 forward = (pad == active_sinkpad);
479 switch (GST_EVENT_TYPE (event)) {
480 case GST_EVENT_STREAM_START:{
483 if (!gst_event_parse_group_id (event, &group_id))
484 sel->have_group_id = FALSE;
487 case GST_EVENT_FLUSH_START:
488 /* Unblock the pad if it's waiting */
489 selpad->flushing = TRUE;
490 GST_INPUT_SELECTOR_BROADCAST (sel);
492 case GST_EVENT_FLUSH_STOP:
493 gst_selector_pad_reset (selpad);
495 case GST_EVENT_SEGMENT:
497 gst_event_copy_segment (event, &selpad->segment);
498 selpad->segment_seqnum = gst_event_get_seqnum (event);
500 /* Update the position */
501 if (selpad->position == GST_CLOCK_TIME_NONE
502 || selpad->segment.position > selpad->position) {
503 selpad->position = selpad->segment.position;
504 } else if (selpad->position != GST_CLOCK_TIME_NONE
505 && selpad->position > selpad->segment.position) {
506 selpad->segment.position = selpad->position;
509 gst_event_unref (event);
510 event = gst_event_new_segment (&selpad->segment);
511 gst_event_set_seqnum (event, selpad->segment_seqnum);
515 GST_DEBUG_OBJECT (pad, "configured SEGMENT %" GST_SEGMENT_FORMAT,
521 GstTagList *tags, *oldtags, *newtags;
523 gst_event_parse_tag (event, &tags);
525 oldtags = selpad->tags;
527 newtags = gst_tag_list_merge (oldtags, tags, GST_TAG_MERGE_REPLACE);
528 selpad->tags = newtags;
530 gst_tag_list_unref (oldtags);
531 GST_DEBUG_OBJECT (pad, "received tags %" GST_PTR_FORMAT, newtags);
540 selpad->eos_sent = TRUE;
542 GstSelectorPad *active_selpad;
544 /* If the active sinkpad is in EOS state but EOS
545 * was not sent downstream this means that the pad
546 * got EOS before it was set as active pad and that
547 * the previously active pad got EOS after it was
550 active_selpad = GST_SELECTOR_PAD (active_sinkpad);
551 forward = (active_selpad->eos && !active_selpad->eos_sent);
552 active_selpad->eos_sent = TRUE;
554 GST_DEBUG_OBJECT (pad, "received EOS");
557 GstClockTime ts, dur;
559 GST_DEBUG_OBJECT (pad, "Received gap event: %" GST_PTR_FORMAT, event);
561 gst_event_parse_gap (event, &ts, &dur);
562 if (GST_CLOCK_TIME_IS_VALID (ts)) {
563 if (GST_CLOCK_TIME_IS_VALID (dur))
566 /* update the segment position */
567 GST_OBJECT_LOCK (pad);
568 selpad->position = ts;
569 selpad->segment.position = ts;
570 GST_OBJECT_UNLOCK (pad);
571 if (sel->sync_streams && active_sinkpad == pad)
572 GST_INPUT_SELECTOR_BROADCAST (sel);
580 GST_INPUT_SELECTOR_UNLOCK (sel);
582 g_object_notify (G_OBJECT (selpad), "tags");
584 GST_DEBUG_OBJECT (pad, "forwarding event");
585 res = gst_pad_push_event (sel->srcpad, event);
587 /* If we aren't forwarding the event because the pad is not the
588 * active_sinkpad, then set the flag on the pad
589 * that says a segment needs sending if/when that pad is activated.
590 * For all other cases, we send the event immediately, which makes
591 * sparse streams and other segment updates work correctly downstream.
593 if (GST_EVENT_IS_STICKY (event))
594 selpad->events_pending = TRUE;
595 gst_event_unref (event);
602 gst_selector_pad_query (GstPad * pad, GstObject * parent, GstQuery * query)
604 gboolean res = FALSE;
606 switch (GST_QUERY_TYPE (query)) {
607 case GST_QUERY_ALLOCATION:{
608 GstPad *active_sinkpad;
609 GstInputSelector *sel = GST_INPUT_SELECTOR (parent);
611 /* Only do the allocation query for the active sinkpad,
612 * after switching a reconfigure event is sent and upstream
613 * should reconfigure and do a new allocation query
615 if (GST_PAD_DIRECTION (pad) == GST_PAD_SINK) {
616 GST_INPUT_SELECTOR_LOCK (sel);
617 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
618 GST_INPUT_SELECTOR_UNLOCK (sel);
620 if (pad != active_sinkpad) {
628 res = gst_pad_query_default (pad, parent, query);
636 /* must be called with the SELECTOR_LOCK, will block while the pad is blocked
637 * or return TRUE when flushing */
639 gst_input_selector_wait (GstInputSelector * self, GstSelectorPad * pad)
641 while (self->blocked && !self->flushing && !pad->flushing) {
642 /* we can be unlocked here when we are shutting down (flushing) or when we
644 GST_INPUT_SELECTOR_WAIT (self);
646 return self->flushing;
649 /* must be called without the SELECTOR_LOCK, will wait until the running time
650 * of the active pad is after this pad or return TRUE when flushing */
652 gst_input_selector_wait_running_time (GstInputSelector * sel,
653 GstSelectorPad * selpad, GstBuffer * buf)
657 GST_DEBUG_OBJECT (selpad, "entering wait for buffer %p", buf);
659 /* If we have no valid timestamp we can't sync this buffer */
660 if (!GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
661 GST_DEBUG_OBJECT (selpad, "leaving wait for buffer with "
662 "invalid timestamp");
666 seg = &selpad->segment;
669 * a) this is the active pad
670 * b) the pad or the selector is flushing
671 * c) the selector is not blocked
672 * d) the buffer running time is before the current running time
673 * (either active-seg or clock, depending on sync-mode)
676 GST_INPUT_SELECTOR_LOCK (sel);
678 GstPad *active_sinkpad;
679 GstSelectorPad *active_selpad;
681 gint64 cur_running_time;
682 GstClockTime running_time;
685 gst_input_selector_activate_sinkpad (sel, GST_PAD_CAST (selpad));
686 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
688 if (seg->format != GST_FORMAT_TIME) {
689 GST_DEBUG_OBJECT (selpad,
690 "Not waiting because we don't have a TIME segment");
691 GST_INPUT_SELECTOR_UNLOCK (sel);
695 running_time = GST_BUFFER_TIMESTAMP (buf);
696 /* If possible try to get the running time at the end of the buffer */
697 if (GST_BUFFER_DURATION_IS_VALID (buf))
698 running_time += GST_BUFFER_DURATION (buf);
699 /* Only use the segment to convert to running time if the segment is
700 * in TIME format, otherwise do our best to try to sync */
701 if (GST_CLOCK_TIME_IS_VALID (seg->stop)) {
702 if (running_time > seg->stop) {
703 running_time = seg->stop;
707 gst_segment_to_running_time (seg, GST_FORMAT_TIME, running_time);
708 /* If this is outside the segment don't sync */
709 if (running_time == -1) {
710 GST_DEBUG_OBJECT (selpad,
711 "Not waiting because buffer is outside segment");
712 GST_INPUT_SELECTOR_UNLOCK (sel);
716 cur_running_time = GST_CLOCK_TIME_NONE;
717 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
718 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
720 GstClockTime base_time;
722 cur_running_time = gst_clock_get_time (clock);
723 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
724 if (base_time <= cur_running_time)
725 cur_running_time -= base_time;
727 cur_running_time = 0;
729 gst_object_unref (clock);
732 GstSegment *active_seg;
734 active_seg = &active_selpad->segment;
736 /* If the active segment is configured but not to time format
737 * we can't do any syncing at all */
738 if (active_seg->format != GST_FORMAT_TIME
739 && active_seg->format != GST_FORMAT_UNDEFINED) {
740 GST_DEBUG_OBJECT (selpad,
741 "Not waiting because active segment isn't in TIME format");
742 GST_INPUT_SELECTOR_UNLOCK (sel);
746 /* Get active pad's running time, if no configured segment yet keep at -1 */
747 if (active_seg->format == GST_FORMAT_TIME)
748 cur_running_time = gst_segment_to_running_time (active_seg,
749 GST_FORMAT_TIME, active_seg->position);
752 if (selpad != active_selpad && !sel->flushing && !selpad->flushing &&
753 (sel->blocked || cur_running_time == -1
754 || running_time >= cur_running_time)) {
756 GST_DEBUG_OBJECT (selpad,
757 "Waiting for active streams to advance. %" GST_TIME_FORMAT " >= %"
758 GST_TIME_FORMAT, GST_TIME_ARGS (running_time),
759 GST_TIME_ARGS (cur_running_time));
761 GST_DEBUG_OBJECT (selpad, "Waiting for selector to unblock");
763 GST_INPUT_SELECTOR_WAIT (sel);
765 GST_INPUT_SELECTOR_UNLOCK (sel);
770 /* Return TRUE if the selector or the pad is flushing */
771 return (sel->flushing || selpad->flushing);
775 forward_sticky_events (GstPad * sinkpad, GstEvent ** event, gpointer user_data)
777 GstInputSelector *sel = GST_INPUT_SELECTOR (user_data);
779 if (GST_EVENT_TYPE (*event) == GST_EVENT_SEGMENT) {
780 GstSegment *seg = &GST_SELECTOR_PAD (sinkpad)->segment;
783 e = gst_event_new_segment (seg);
784 gst_event_set_seqnum (e, GST_SELECTOR_PAD_CAST (sinkpad)->segment_seqnum);
786 gst_pad_push_event (sel->srcpad, e);
787 } else if (GST_EVENT_TYPE (*event) == GST_EVENT_STREAM_START
788 && !sel->have_group_id) {
790 gst_pad_get_sticky_event (sel->srcpad, GST_EVENT_STREAM_START, 0);
792 /* Only push stream-start once if not all our streams have a stream-id */
794 gst_pad_push_event (sel->srcpad, gst_event_ref (*event));
796 gst_event_unref (tmp);
799 gst_pad_push_event (sel->srcpad, gst_event_ref (*event));
805 #if DEBUG_CACHED_BUFFERS
807 gst_input_selector_debug_cached_buffers (GstInputSelector * sel)
811 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
812 GstSelectorPad *selpad;
817 selpad = GST_SELECTOR_PAD_CAST (walk->data);
818 if (!selpad->cached_buffers) {
819 GST_DEBUG_OBJECT (selpad, "Cached buffers timestamps: <none>");
823 timestamps = g_string_new ("Cached buffers timestamps:");
824 for (i = 0; i < selpad->cached_buffers->length; ++i) {
825 GstSelectorPadCachedBuffer *cached_buffer;
827 cached_buffer = g_queue_peek_nth (selpad->cached_buffers, i);
828 g_string_append_printf (timestamps, " %" GST_TIME_FORMAT,
829 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (cached_buffer->buffer)));
831 str = g_string_free (timestamps, FALSE);
832 GST_DEBUG_OBJECT (selpad, str);
838 /* must be called with the SELECTOR_LOCK */
840 gst_input_selector_cleanup_old_cached_buffers (GstInputSelector * sel,
844 gint64 cur_running_time;
847 cur_running_time = GST_CLOCK_TIME_NONE;
848 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
849 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
851 GstClockTime base_time;
853 cur_running_time = gst_clock_get_time (clock);
854 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
855 if (base_time <= cur_running_time)
856 cur_running_time -= base_time;
858 cur_running_time = 0;
860 gst_object_unref (clock);
863 GstPad *active_sinkpad;
864 GstSelectorPad *active_selpad;
865 GstSegment *active_seg;
867 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
868 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
869 active_seg = &active_selpad->segment;
871 /* Get active pad's running time, if no configured segment yet keep at -1 */
872 if (active_seg->format == GST_FORMAT_TIME)
873 cur_running_time = gst_segment_to_running_time (active_seg,
874 GST_FORMAT_TIME, active_seg->position);
877 if (!GST_CLOCK_TIME_IS_VALID (cur_running_time))
880 GST_DEBUG_OBJECT (sel, "Cleaning up old cached buffers");
881 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
882 GstSelectorPad *selpad;
884 GstSelectorPadCachedBuffer *cached_buffer;
885 GSList *maybe_remove;
886 guint queue_position;
888 selpad = GST_SELECTOR_PAD_CAST (walk->data);
889 if (!selpad->cached_buffers)
892 seg = &selpad->segment;
896 while ((cached_buffer = g_queue_peek_nth (selpad->cached_buffers,
898 GstBuffer *buffer = cached_buffer->buffer;
899 GstClockTime running_time;
902 /* If we have no valid timestamp we can't sync this buffer */
903 if (!GST_BUFFER_TIMESTAMP_IS_VALID (buffer)) {
904 maybe_remove = g_slist_append (maybe_remove, cached_buffer);
905 queue_position = g_slist_length (maybe_remove);
909 /* the buffer is still valid if its duration is valid and the
910 * timestamp + duration is >= time, or if its duration is invalid
911 * and the timestamp is >= time */
912 running_time = GST_BUFFER_TIMESTAMP (buffer);
913 /* If possible try to get the running time at the end of the buffer */
914 if (GST_BUFFER_DURATION_IS_VALID (buffer))
915 running_time += GST_BUFFER_DURATION (buffer);
916 /* Only use the segment to convert to running time if the segment is
917 * in TIME format, otherwise do our best to try to sync */
918 if (GST_CLOCK_TIME_IS_VALID (seg->stop)) {
919 if (running_time > seg->stop) {
920 running_time = seg->stop;
924 gst_segment_to_running_time (seg, GST_FORMAT_TIME, running_time);
926 GST_DEBUG_OBJECT (selpad,
927 "checking if buffer %p running time=%" GST_TIME_FORMAT
928 " >= stream time=%" GST_TIME_FORMAT, buffer,
929 GST_TIME_ARGS (running_time), GST_TIME_ARGS (cur_running_time));
930 if (running_time >= cur_running_time) {
934 GST_DEBUG_OBJECT (selpad, "Removing old cached buffer %p", buffer);
935 g_queue_pop_nth (selpad->cached_buffers, queue_position);
936 gst_selector_pad_free_cached_buffer (cached_buffer);
938 for (l = maybe_remove; l != NULL; l = g_slist_next (l)) {
939 /* A buffer after some invalid buffers was removed, it means the invalid buffers
940 * are old, lets also remove them */
941 cached_buffer = l->data;
942 g_queue_remove (selpad->cached_buffers, cached_buffer);
943 gst_selector_pad_free_cached_buffer (cached_buffer);
946 g_slist_free (maybe_remove);
951 g_slist_free (maybe_remove);
954 if (g_queue_is_empty (selpad->cached_buffers)) {
955 g_queue_free (selpad->cached_buffers);
956 selpad->cached_buffers = NULL;
960 #if DEBUG_CACHED_BUFFERS
961 gst_input_selector_debug_cached_buffers (sel);
966 gst_selector_pad_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
968 GstInputSelector *sel;
970 GstPad *active_sinkpad;
971 GstPad *prev_active_sinkpad = NULL;
972 GstSelectorPad *selpad;
973 GstClockTime start_time;
975 sel = GST_INPUT_SELECTOR (parent);
976 selpad = GST_SELECTOR_PAD_CAST (pad);
978 GST_DEBUG_OBJECT (selpad,
979 "entering chain for buf %p with timestamp %" GST_TIME_FORMAT, buf,
980 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
982 GST_INPUT_SELECTOR_LOCK (sel);
983 /* wait or check for flushing */
984 if (gst_input_selector_wait (sel, selpad)) {
985 GST_INPUT_SELECTOR_UNLOCK (sel);
989 GST_LOG_OBJECT (pad, "getting active pad");
991 prev_active_sinkpad =
992 sel->active_sinkpad ? gst_object_ref (sel->active_sinkpad) : NULL;
993 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
995 /* In sync mode wait until the active pad has advanced
996 * after the running time of the current buffer */
997 if (sel->sync_streams) {
998 /* call chain for each cached buffer if we are not the active pad
999 * or if we are the active pad but didn't push anything yet. */
1000 if (active_sinkpad != pad || !selpad->pushed) {
1001 /* no need to check for sel->cache_buffers as selpad->cached_buffers
1002 * will only be valid if cache_buffers is TRUE */
1003 if (selpad->cached_buffers && !selpad->sending_cached_buffers) {
1004 GstSelectorPadCachedBuffer *cached_buffer;
1005 GstSegment saved_segment;
1007 saved_segment = selpad->segment;
1009 selpad->sending_cached_buffers = TRUE;
1010 while (!sel->flushing && !selpad->flushing &&
1011 (cached_buffer = g_queue_pop_head (selpad->cached_buffers))) {
1012 GST_DEBUG_OBJECT (pad, "Cached buffers found, "
1013 "invoking chain for cached buffer %p", cached_buffer->buffer);
1015 selpad->segment = cached_buffer->segment;
1016 selpad->events_pending = TRUE;
1017 GST_INPUT_SELECTOR_UNLOCK (sel);
1018 gst_selector_pad_chain (pad, parent, cached_buffer->buffer);
1019 GST_INPUT_SELECTOR_LOCK (sel);
1021 /* we may have cleaned up the queue in the meantime because of
1023 if (!selpad->cached_buffers) {
1027 selpad->sending_cached_buffers = FALSE;
1029 /* all cached buffers sent, restore segment for current buffer */
1030 selpad->segment = saved_segment;
1031 selpad->events_pending = TRUE;
1033 /* Might have changed while calling chain for cached buffers */
1034 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
1038 if (active_sinkpad != pad) {
1039 GST_INPUT_SELECTOR_UNLOCK (sel);
1040 if (gst_input_selector_wait_running_time (sel, selpad, buf))
1042 GST_INPUT_SELECTOR_LOCK (sel);
1045 /* Might have changed while waiting */
1046 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
1049 /* update the segment on the srcpad */
1050 start_time = GST_BUFFER_TIMESTAMP (buf);
1051 if (GST_CLOCK_TIME_IS_VALID (start_time)) {
1052 GST_LOG_OBJECT (pad, "received start time %" GST_TIME_FORMAT,
1053 GST_TIME_ARGS (start_time));
1054 if (GST_BUFFER_DURATION_IS_VALID (buf))
1055 GST_LOG_OBJECT (pad, "received end time %" GST_TIME_FORMAT,
1056 GST_TIME_ARGS (start_time + GST_BUFFER_DURATION (buf)));
1058 GST_OBJECT_LOCK (pad);
1059 selpad->position = start_time;
1060 selpad->segment.position = start_time;
1061 GST_OBJECT_UNLOCK (pad);
1064 /* Ignore buffers from pads except the selected one */
1065 if (pad != active_sinkpad)
1068 /* Tell all non-active pads that we advanced the running time */
1069 if (sel->sync_streams)
1070 GST_INPUT_SELECTOR_BROADCAST (sel);
1072 GST_INPUT_SELECTOR_UNLOCK (sel);
1074 if (prev_active_sinkpad != active_sinkpad) {
1075 if (prev_active_sinkpad)
1076 g_object_notify (G_OBJECT (prev_active_sinkpad), "active");
1077 g_object_notify (G_OBJECT (active_sinkpad), "active");
1078 g_object_notify (G_OBJECT (sel), "active-pad");
1081 /* if we have a pending events, push them now */
1082 if (G_UNLIKELY (prev_active_sinkpad != active_sinkpad
1083 || selpad->events_pending)) {
1084 gst_pad_sticky_events_foreach (GST_PAD_CAST (selpad), forward_sticky_events,
1086 selpad->events_pending = FALSE;
1089 if (prev_active_sinkpad)
1090 gst_object_unref (prev_active_sinkpad);
1091 prev_active_sinkpad = NULL;
1093 if (selpad->discont) {
1094 buf = gst_buffer_make_writable (buf);
1096 GST_DEBUG_OBJECT (pad, "Marking discont buffer %p", buf);
1097 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
1098 selpad->discont = FALSE;
1102 GST_LOG_OBJECT (pad, "Forwarding buffer %p with timestamp %" GST_TIME_FORMAT,
1103 buf, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
1105 /* Only make the buffer read-only when necessary */
1106 if (sel->sync_streams && sel->cache_buffers)
1107 buf = gst_buffer_ref (buf);
1108 res = gst_pad_push (sel->srcpad, buf);
1109 GST_LOG_OBJECT (pad, "Buffer %p forwarded result=%d", buf, res);
1111 GST_INPUT_SELECTOR_LOCK (sel);
1113 if (sel->sync_streams && sel->cache_buffers) {
1114 /* Might have changed while pushing */
1115 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
1116 /* only set pad to pushed if we are still the active pad */
1117 if (active_sinkpad == pad)
1118 selpad->pushed = TRUE;
1120 /* cache buffer as we may need it again if we change pads */
1121 gst_selector_pad_cache_buffer (selpad, buf);
1122 gst_input_selector_cleanup_old_cached_buffers (sel, pad);
1124 selpad->pushed = TRUE;
1126 GST_INPUT_SELECTOR_UNLOCK (sel);
1130 if (prev_active_sinkpad)
1131 gst_object_unref (prev_active_sinkpad);
1132 prev_active_sinkpad = NULL;
1136 /* dropped buffers */
1139 gboolean active_pad_pushed = GST_SELECTOR_PAD_CAST (active_sinkpad)->pushed;
1141 GST_DEBUG_OBJECT (pad, "Pad not active, discard buffer %p", buf);
1142 /* when we drop a buffer, we're creating a discont on this pad */
1143 selpad->discont = TRUE;
1144 GST_INPUT_SELECTOR_UNLOCK (sel);
1145 gst_buffer_unref (buf);
1147 /* figure out what to return upstream */
1148 GST_OBJECT_LOCK (selpad);
1149 if (selpad->always_ok || !active_pad_pushed)
1152 res = GST_FLOW_NOT_LINKED;
1153 GST_OBJECT_UNLOCK (selpad);
1159 GST_DEBUG_OBJECT (pad, "We are flushing, discard buffer %p", buf);
1160 gst_buffer_unref (buf);
1161 res = GST_FLOW_FLUSHING;
1166 static void gst_input_selector_dispose (GObject * object);
1167 static void gst_input_selector_finalize (GObject * object);
1169 static void gst_input_selector_set_property (GObject * object,
1170 guint prop_id, const GValue * value, GParamSpec * pspec);
1171 static void gst_input_selector_get_property (GObject * object,
1172 guint prop_id, GValue * value, GParamSpec * pspec);
1174 static GstPad *gst_input_selector_request_new_pad (GstElement * element,
1175 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps);
1176 static void gst_input_selector_release_pad (GstElement * element, GstPad * pad);
1178 static GstStateChangeReturn gst_input_selector_change_state (GstElement *
1179 element, GstStateChange transition);
1181 static gboolean gst_input_selector_event (GstPad * pad, GstObject * parent,
1183 static gboolean gst_input_selector_query (GstPad * pad, GstObject * parent,
1185 static gint64 gst_input_selector_block (GstInputSelector * self);
1188 GST_DEBUG_CATEGORY_INIT (input_selector_debug, \
1189 "input-selector", 0, "An input stream selector element");
1190 #define gst_input_selector_parent_class parent_class
1191 G_DEFINE_TYPE_WITH_CODE (GstInputSelector, gst_input_selector, GST_TYPE_ELEMENT,
1195 gst_input_selector_class_init (GstInputSelectorClass * klass)
1197 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
1198 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
1200 gobject_class->dispose = gst_input_selector_dispose;
1201 gobject_class->finalize = gst_input_selector_finalize;
1203 gobject_class->set_property = gst_input_selector_set_property;
1204 gobject_class->get_property = gst_input_selector_get_property;
1206 g_object_class_install_property (gobject_class, PROP_N_PADS,
1207 g_param_spec_uint ("n-pads", "Number of Pads",
1208 "The number of sink pads", 0, G_MAXUINT, 0,
1209 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
1211 g_object_class_install_property (gobject_class, PROP_ACTIVE_PAD,
1212 g_param_spec_object ("active-pad", "Active pad",
1213 "The currently active sink pad", GST_TYPE_PAD,
1214 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
1217 * GstInputSelector:sync-streams
1219 * If set to %TRUE all inactive streams will be synced to the
1220 * running time of the active stream or to the current clock.
1222 * To make sure no buffers are dropped by input-selector
1223 * that might be needed when switching the active pad,
1224 * sync-mode should be set to "clock" and cache-buffers to TRUE.
1226 g_object_class_install_property (gobject_class, PROP_SYNC_STREAMS,
1227 g_param_spec_boolean ("sync-streams", "Sync Streams",
1228 "Synchronize inactive streams to the running time of the active "
1229 "stream or to the current clock",
1230 DEFAULT_SYNC_STREAMS,
1231 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1232 GST_PARAM_MUTABLE_READY));
1235 * GstInputSelector:sync-mode
1237 * Select how input-selector will sync buffers when in sync-streams mode.
1239 * Note that when using the "active-segment" mode, the "active-segment" may
1240 * be ahead of current clock time when switching the active pad, as the current
1241 * active pad may have pushed more buffers than what was displayed/consumed,
1242 * which may cause delays and some missing buffers.
1244 g_object_class_install_property (gobject_class, PROP_SYNC_MODE,
1245 g_param_spec_enum ("sync-mode", "Sync mode",
1246 "Behavior in sync-streams mode", GST_TYPE_INPUT_SELECTOR_SYNC_MODE,
1248 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1249 GST_PARAM_MUTABLE_READY));
1252 * GstInputSelector:cache-buffers
1254 * If set to %TRUE and GstInputSelector:sync-streams is also set to %TRUE,
1255 * the active pad will cache the buffers still considered valid (after current
1256 * running time, see sync-mode) to avoid missing frames if/when the pad is
1259 * The active pad may push more buffers than what is currently displayed/consumed
1260 * and when changing pads those buffers will be discarded and the only way to
1261 * reactivate that pad without loosing the already consumed buffers is to enable cache.
1263 g_object_class_install_property (gobject_class, PROP_CACHE_BUFFERS,
1264 g_param_spec_boolean ("cache-buffers", "Cache Buffers",
1265 "Cache buffers for active-pad",
1266 DEFAULT_CACHE_BUFFERS,
1267 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1268 GST_PARAM_MUTABLE_READY));
1271 * GstInputSelector::block:
1272 * @inputselector: the #GstInputSelector
1274 * Block all sink pads in preparation for a switch. Returns the stop time of
1275 * the current switch segment, as a running time, or 0 if there is no current
1276 * active pad or the current active pad never received data.
1278 gst_input_selector_signals[SIGNAL_BLOCK] =
1279 g_signal_new ("block", G_TYPE_FROM_CLASS (klass),
1280 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1281 G_STRUCT_OFFSET (GstInputSelectorClass, block), NULL, NULL,
1282 g_cclosure_marshal_generic, G_TYPE_INT64, 0);
1284 gst_element_class_set_static_metadata (gstelement_class, "Input selector",
1285 "Generic", "N-to-1 input stream selector",
1286 "Julien Moutte <julien@moutte.net>, "
1287 "Jan Schmidt <thaytan@mad.scientist.com>, "
1288 "Wim Taymans <wim.taymans@gmail.com>");
1289 gst_element_class_add_pad_template (gstelement_class,
1290 gst_static_pad_template_get (&gst_input_selector_sink_factory));
1291 gst_element_class_add_pad_template (gstelement_class,
1292 gst_static_pad_template_get (&gst_input_selector_src_factory));
1294 gstelement_class->request_new_pad = gst_input_selector_request_new_pad;
1295 gstelement_class->release_pad = gst_input_selector_release_pad;
1296 gstelement_class->change_state = gst_input_selector_change_state;
1298 klass->block = GST_DEBUG_FUNCPTR (gst_input_selector_block);
1302 gst_input_selector_init (GstInputSelector * sel)
1304 sel->srcpad = gst_pad_new ("src", GST_PAD_SRC);
1305 gst_pad_set_iterate_internal_links_function (sel->srcpad,
1306 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1307 gst_pad_set_query_function (sel->srcpad,
1308 GST_DEBUG_FUNCPTR (gst_input_selector_query));
1309 gst_pad_set_event_function (sel->srcpad,
1310 GST_DEBUG_FUNCPTR (gst_input_selector_event));
1311 GST_OBJECT_FLAG_SET (sel->srcpad, GST_PAD_FLAG_PROXY_CAPS);
1312 gst_element_add_pad (GST_ELEMENT (sel), sel->srcpad);
1313 /* sinkpad management */
1314 sel->active_sinkpad = NULL;
1316 sel->sync_streams = DEFAULT_SYNC_STREAMS;
1317 sel->have_group_id = TRUE;
1319 g_mutex_init (&sel->lock);
1320 g_cond_init (&sel->cond);
1321 sel->blocked = FALSE;
1323 /* lets give a change for downstream to do something on
1324 * active-pad change before we start pushing new buffers */
1325 g_signal_connect_data (sel, "notify::active-pad",
1326 (GCallback) gst_input_selector_active_pad_changed, NULL,
1327 NULL, G_CONNECT_AFTER);
1331 gst_input_selector_dispose (GObject * object)
1333 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1335 if (sel->active_sinkpad) {
1336 gst_object_unref (sel->active_sinkpad);
1337 sel->active_sinkpad = NULL;
1339 G_OBJECT_CLASS (parent_class)->dispose (object);
1343 gst_input_selector_finalize (GObject * object)
1345 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1347 g_mutex_clear (&sel->lock);
1348 g_cond_clear (&sel->cond);
1350 G_OBJECT_CLASS (parent_class)->finalize (object);
1353 /* this function must be called with the SELECTOR_LOCK. It returns TRUE when the
1354 * active pad changed. */
1356 gst_input_selector_set_active_pad (GstInputSelector * self, GstPad * pad)
1358 GstSelectorPad *old, *new;
1359 GstPad **active_pad_p;
1361 if (pad == self->active_sinkpad)
1364 old = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
1365 new = GST_SELECTOR_PAD_CAST (pad);
1367 GST_DEBUG_OBJECT (self, "setting active pad to %s:%s",
1368 GST_DEBUG_PAD_NAME (new));
1371 old->pushed = FALSE;
1373 new->pushed = FALSE;
1375 /* Send a new SEGMENT event on the new pad next */
1376 if (old != new && new)
1377 new->events_pending = TRUE;
1379 active_pad_p = &self->active_sinkpad;
1380 gst_object_replace ((GstObject **) active_pad_p, GST_OBJECT_CAST (pad));
1382 if (old && old != new)
1383 gst_pad_push_event (GST_PAD_CAST (old), gst_event_new_reconfigure ());
1385 gst_pad_push_event (GST_PAD_CAST (new), gst_event_new_reconfigure ());
1387 GST_DEBUG_OBJECT (self, "New active pad is %" GST_PTR_FORMAT,
1388 self->active_sinkpad);
1394 gst_input_selector_set_property (GObject * object, guint prop_id,
1395 const GValue * value, GParamSpec * pspec)
1397 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1400 case PROP_ACTIVE_PAD:
1404 pad = g_value_get_object (value);
1406 GST_INPUT_SELECTOR_LOCK (sel);
1408 #if DEBUG_CACHED_BUFFERS
1409 gst_input_selector_debug_cached_buffers (sel);
1412 gst_input_selector_set_active_pad (sel, pad);
1414 #if DEBUG_CACHED_BUFFERS
1415 gst_input_selector_debug_cached_buffers (sel);
1418 GST_INPUT_SELECTOR_UNLOCK (sel);
1421 case PROP_SYNC_STREAMS:
1422 GST_INPUT_SELECTOR_LOCK (sel);
1423 sel->sync_streams = g_value_get_boolean (value);
1424 GST_INPUT_SELECTOR_UNLOCK (sel);
1426 case PROP_SYNC_MODE:
1427 GST_INPUT_SELECTOR_LOCK (sel);
1428 sel->sync_mode = g_value_get_enum (value);
1429 GST_INPUT_SELECTOR_UNLOCK (sel);
1431 case PROP_CACHE_BUFFERS:
1432 GST_INPUT_SELECTOR_LOCK (object);
1433 sel->cache_buffers = g_value_get_boolean (value);
1434 GST_INPUT_SELECTOR_UNLOCK (object);
1437 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1443 gst_input_selector_active_pad_changed (GstInputSelector * sel,
1444 GParamSpec * pspec, gpointer user_data)
1446 /* Wake up all non-active pads in sync mode, they might be
1447 * the active pad now */
1448 if (sel->sync_streams)
1449 GST_INPUT_SELECTOR_BROADCAST (sel);
1453 gst_input_selector_get_property (GObject * object, guint prop_id,
1454 GValue * value, GParamSpec * pspec)
1456 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1460 GST_INPUT_SELECTOR_LOCK (object);
1461 g_value_set_uint (value, sel->n_pads);
1462 GST_INPUT_SELECTOR_UNLOCK (object);
1464 case PROP_ACTIVE_PAD:
1465 GST_INPUT_SELECTOR_LOCK (object);
1466 g_value_set_object (value, sel->active_sinkpad);
1467 GST_INPUT_SELECTOR_UNLOCK (object);
1469 case PROP_SYNC_STREAMS:
1470 GST_INPUT_SELECTOR_LOCK (object);
1471 g_value_set_boolean (value, sel->sync_streams);
1472 GST_INPUT_SELECTOR_UNLOCK (object);
1474 case PROP_SYNC_MODE:
1475 GST_INPUT_SELECTOR_LOCK (object);
1476 g_value_set_enum (value, sel->sync_mode);
1477 GST_INPUT_SELECTOR_UNLOCK (object);
1479 case PROP_CACHE_BUFFERS:
1480 GST_INPUT_SELECTOR_LOCK (object);
1481 g_value_set_boolean (value, sel->cache_buffers);
1482 GST_INPUT_SELECTOR_UNLOCK (object);
1485 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1491 gst_input_selector_get_linked_pad (GstInputSelector * sel, GstPad * pad,
1494 GstPad *otherpad = NULL;
1496 GST_INPUT_SELECTOR_LOCK (sel);
1497 if (pad == sel->srcpad)
1498 otherpad = sel->active_sinkpad;
1499 else if (pad == sel->active_sinkpad || !strict)
1500 otherpad = sel->srcpad;
1502 gst_object_ref (otherpad);
1503 GST_INPUT_SELECTOR_UNLOCK (sel);
1509 gst_input_selector_event (GstPad * pad, GstObject * parent, GstEvent * event)
1511 GstInputSelector *sel;
1512 gboolean result = FALSE;
1514 gboolean done = FALSE;
1515 GValue item = { 0, };
1517 GList *pushed_pads = NULL;
1519 sel = GST_INPUT_SELECTOR (parent);
1520 /* Send upstream events to all sinkpads */
1521 iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1523 /* This is now essentially a copy of gst_pad_event_default_dispatch
1524 * with a different iterator */
1526 switch (gst_iterator_next (iter, &item)) {
1527 case GST_ITERATOR_OK:
1528 eventpad = g_value_get_object (&item);
1530 /* if already pushed, skip */
1531 if (g_list_find (pushed_pads, eventpad)) {
1532 g_value_reset (&item);
1536 gst_event_ref (event);
1537 result |= gst_pad_push_event (eventpad, event);
1539 g_value_reset (&item);
1541 case GST_ITERATOR_RESYNC:
1542 /* We don't reset the result here because we don't push the event
1543 * again on pads that got the event already and because we need
1544 * to consider the result of the previous pushes */
1545 gst_iterator_resync (iter);
1547 case GST_ITERATOR_ERROR:
1548 GST_ERROR_OBJECT (pad, "Could not iterate over sinkpads");
1551 case GST_ITERATOR_DONE:
1556 g_value_unset (&item);
1557 gst_iterator_free (iter);
1559 g_list_free (pushed_pads);
1561 gst_event_unref (event);
1566 /* query on the srcpad. We override this function because by default it will
1567 * only forward the query to one random sinkpad */
1569 gst_input_selector_query (GstPad * pad, GstObject * parent, GstQuery * query)
1571 gboolean res = FALSE;
1572 GstInputSelector *sel;
1574 sel = GST_INPUT_SELECTOR (parent);
1576 switch (GST_QUERY_TYPE (query)) {
1577 case GST_QUERY_LATENCY:
1580 GstClockTime resmin, resmax;
1587 /* perform the query on all sinkpads and combine the results. We take the
1588 * max of min and the min of max for the result latency. */
1589 GST_INPUT_SELECTOR_LOCK (sel);
1590 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk;
1591 walk = g_list_next (walk)) {
1592 GstPad *sinkpad = GST_PAD_CAST (walk->data);
1594 if (gst_pad_peer_query (sinkpad, query)) {
1595 GstClockTime min, max;
1598 /* one query succeeded, we succeed too */
1601 gst_query_parse_latency (query, &live, &min, &max);
1603 GST_DEBUG_OBJECT (sinkpad,
1604 "peer latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
1605 ", live %d", GST_TIME_ARGS (min), GST_TIME_ARGS (max), live);
1612 else if (max < resmax)
1614 if (reslive == FALSE)
1619 GST_INPUT_SELECTOR_UNLOCK (sel);
1621 gst_query_set_latency (query, reslive, resmin, resmax);
1623 GST_DEBUG_OBJECT (sel,
1624 "total latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
1625 ", live %d", GST_TIME_ARGS (resmin), GST_TIME_ARGS (resmax),
1632 res = gst_pad_query_default (pad, parent, query);
1639 /* check if the pad is the active sinkpad */
1640 static inline gboolean
1641 gst_input_selector_is_active_sinkpad (GstInputSelector * sel, GstPad * pad)
1645 GST_INPUT_SELECTOR_LOCK (sel);
1646 res = (pad == sel->active_sinkpad);
1647 GST_INPUT_SELECTOR_UNLOCK (sel);
1652 /* Get or create the active sinkpad, must be called with SELECTOR_LOCK */
1654 gst_input_selector_activate_sinkpad (GstInputSelector * sel, GstPad * pad)
1656 GstPad *active_sinkpad;
1657 GstSelectorPad *selpad;
1659 selpad = GST_SELECTOR_PAD_CAST (pad);
1661 selpad->active = TRUE;
1662 active_sinkpad = sel->active_sinkpad;
1663 if (sel->active_sinkpad == NULL) {
1664 GValue item = G_VALUE_INIT;
1665 GstIterator *iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1666 GstIteratorResult ires;
1668 while ((ires = gst_iterator_next (iter, &item)) == GST_ITERATOR_RESYNC)
1669 gst_iterator_resync (iter);
1670 if (ires == GST_ITERATOR_OK) {
1671 /* If no pad is currently selected, we return the first usable pad to
1672 * guarantee consistency */
1674 active_sinkpad = sel->active_sinkpad = g_value_dup_object (&item);
1675 g_value_reset (&item);
1676 GST_DEBUG_OBJECT (sel, "Activating pad %s:%s",
1677 GST_DEBUG_PAD_NAME (active_sinkpad));
1679 GST_WARNING_OBJECT (sel, "Couldn't find a default sink pad");
1680 gst_iterator_free (iter);
1683 return active_sinkpad;
1687 gst_input_selector_request_new_pad (GstElement * element,
1688 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps)
1690 GstInputSelector *sel;
1692 GstPad *sinkpad = NULL;
1694 g_return_val_if_fail (templ->direction == GST_PAD_SINK, NULL);
1696 sel = GST_INPUT_SELECTOR (element);
1698 GST_INPUT_SELECTOR_LOCK (sel);
1700 GST_LOG_OBJECT (sel, "Creating new pad %d", sel->padcount);
1701 name = g_strdup_printf ("sink_%u", sel->padcount++);
1702 sinkpad = g_object_new (GST_TYPE_SELECTOR_PAD,
1703 "name", name, "direction", templ->direction, "template", templ, NULL);
1708 gst_pad_set_event_function (sinkpad,
1709 GST_DEBUG_FUNCPTR (gst_selector_pad_event));
1710 gst_pad_set_query_function (sinkpad,
1711 GST_DEBUG_FUNCPTR (gst_selector_pad_query));
1712 gst_pad_set_chain_function (sinkpad,
1713 GST_DEBUG_FUNCPTR (gst_selector_pad_chain));
1714 gst_pad_set_iterate_internal_links_function (sinkpad,
1715 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1717 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_CAPS);
1718 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_ALLOCATION);
1719 gst_pad_set_active (sinkpad, TRUE);
1720 gst_element_add_pad (GST_ELEMENT (sel), sinkpad);
1721 GST_INPUT_SELECTOR_UNLOCK (sel);
1727 gst_input_selector_release_pad (GstElement * element, GstPad * pad)
1729 GstInputSelector *sel;
1731 sel = GST_INPUT_SELECTOR (element);
1732 GST_LOG_OBJECT (sel, "Releasing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1734 GST_INPUT_SELECTOR_LOCK (sel);
1735 /* if the pad was the active pad, makes us select a new one */
1736 if (sel->active_sinkpad == pad) {
1737 GST_DEBUG_OBJECT (sel, "Deactivating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1738 gst_object_unref (sel->active_sinkpad);
1739 sel->active_sinkpad = NULL;
1742 GST_INPUT_SELECTOR_UNLOCK (sel);
1744 gst_pad_set_active (pad, FALSE);
1745 gst_element_remove_pad (GST_ELEMENT (sel), pad);
1749 gst_input_selector_reset (GstInputSelector * sel)
1753 GST_INPUT_SELECTOR_LOCK (sel);
1754 /* clear active pad */
1755 if (sel->active_sinkpad) {
1756 gst_object_unref (sel->active_sinkpad);
1757 sel->active_sinkpad = NULL;
1759 /* reset each of our sinkpads state */
1760 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
1761 GstSelectorPad *selpad = GST_SELECTOR_PAD_CAST (walk->data);
1763 gst_selector_pad_reset (selpad);
1766 gst_tag_list_unref (selpad->tags);
1767 selpad->tags = NULL;
1770 sel->have_group_id = TRUE;
1771 GST_INPUT_SELECTOR_UNLOCK (sel);
1774 static GstStateChangeReturn
1775 gst_input_selector_change_state (GstElement * element,
1776 GstStateChange transition)
1778 GstInputSelector *self = GST_INPUT_SELECTOR (element);
1779 GstStateChangeReturn result;
1781 switch (transition) {
1782 case GST_STATE_CHANGE_READY_TO_PAUSED:
1783 GST_INPUT_SELECTOR_LOCK (self);
1784 self->blocked = FALSE;
1785 self->flushing = FALSE;
1786 GST_INPUT_SELECTOR_UNLOCK (self);
1788 case GST_STATE_CHANGE_PAUSED_TO_READY:
1789 /* first unlock before we call the parent state change function, which
1790 * tries to acquire the stream lock when going to ready. */
1791 GST_INPUT_SELECTOR_LOCK (self);
1792 self->blocked = FALSE;
1793 self->flushing = TRUE;
1794 GST_INPUT_SELECTOR_BROADCAST (self);
1795 GST_INPUT_SELECTOR_UNLOCK (self);
1801 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1803 switch (transition) {
1804 case GST_STATE_CHANGE_PAUSED_TO_READY:
1805 gst_input_selector_reset (self);
1815 gst_input_selector_block (GstInputSelector * self)
1818 GstSelectorPad *spad;
1820 GST_INPUT_SELECTOR_LOCK (self);
1823 GST_WARNING_OBJECT (self, "switch already blocked");
1825 self->blocked = TRUE;
1826 spad = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
1829 ret = gst_selector_pad_get_running_time (spad);
1831 GST_DEBUG_OBJECT (self, "no active pad while blocking");
1833 GST_INPUT_SELECTOR_UNLOCK (self);