1 /* GStreamer input selector
2 * Copyright (C) 2003 Julien Moutte <julien@moutte.net>
3 * Copyright (C) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
4 * Copyright (C) 2005 Jan Schmidt <thaytan@mad.scientist.com>
5 * Copyright (C) 2007 Wim Taymans <wim.taymans@gmail.com>
6 * Copyright (C) 2007 Andy Wingo <wingo@pobox.com>
7 * Copyright (C) 2008 Nokia Corporation. (contact <stefan.kost@nokia.com>)
8 * Copyright (C) 2011 Sebastian Dröge <sebastian.droege@collabora.co.uk>
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Library General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Library General Public License for more details.
20 * You should have received a copy of the GNU Library General Public
21 * License along with this library; if not, write to the
22 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
23 * Boston, MA 02110-1301, USA.
27 * SECTION:element-input-selector
28 * @title: input-selector
29 * @see_also: #GstOutputSelector
31 * Direct one out of N input streams to the output pad.
33 * The input pads are from a GstPad subclass and have additional
34 * properties, which users may find useful, namely:
36 * * "running-time": Running time of stream on pad (#gint64)
37 * * "tags": The currently active tags on the pad (#GstTagList, boxed type)
38 * * "active": If the pad is currently active (#gboolean)
39 * * "always-ok" : Make an inactive pads return #GST_FLOW_OK instead of
40 * #GST_FLOW_NOT_LINKED
50 #include "gstinputselector.h"
52 #define DEBUG_CACHED_BUFFERS 0
54 GST_DEBUG_CATEGORY_STATIC (input_selector_debug);
55 #define GST_CAT_DEFAULT input_selector_debug
57 #define GST_TYPE_INPUT_SELECTOR_SYNC_MODE (gst_input_selector_sync_mode_get_type())
59 gst_input_selector_sync_mode_get_type (void)
61 static GType type = 0;
62 static const GEnumValue data[] = {
63 {GST_INPUT_SELECTOR_SYNC_MODE_ACTIVE_SEGMENT,
64 "Sync using the current active segment",
66 {GST_INPUT_SELECTOR_SYNC_MODE_CLOCK, "Sync using the clock", "clock"},
71 type = g_enum_register_static ("GstInputSelectorSyncMode", data);
76 #define GST_INPUT_SELECTOR_GET_LOCK(sel) (&((GstInputSelector*)(sel))->lock)
77 #define GST_INPUT_SELECTOR_GET_COND(sel) (&((GstInputSelector*)(sel))->cond)
78 #define GST_INPUT_SELECTOR_LOCK(sel) (g_mutex_lock (GST_INPUT_SELECTOR_GET_LOCK(sel)))
79 #define GST_INPUT_SELECTOR_UNLOCK(sel) (g_mutex_unlock (GST_INPUT_SELECTOR_GET_LOCK(sel)))
80 #define GST_INPUT_SELECTOR_WAIT(sel) (g_cond_wait (GST_INPUT_SELECTOR_GET_COND(sel), \
81 GST_INPUT_SELECTOR_GET_LOCK(sel)))
82 #define GST_INPUT_SELECTOR_BROADCAST(sel) (g_cond_broadcast (GST_INPUT_SELECTOR_GET_COND(sel)))
84 static GstStaticPadTemplate gst_input_selector_sink_factory =
85 GST_STATIC_PAD_TEMPLATE ("sink_%u",
90 static GstStaticPadTemplate gst_input_selector_src_factory =
91 GST_STATIC_PAD_TEMPLATE ("src",
106 #define DEFAULT_SYNC_STREAMS TRUE
107 #define DEFAULT_SYNC_MODE GST_INPUT_SELECTOR_SYNC_MODE_ACTIVE_SEGMENT
108 #define DEFAULT_CACHE_BUFFERS FALSE
109 #define DEFAULT_PAD_ALWAYS_OK TRUE
114 PROP_PAD_RUNNING_TIME,
120 static void gst_input_selector_active_pad_changed (GstInputSelector * sel,
121 GParamSpec * pspec, gpointer user_data);
122 static inline gboolean gst_input_selector_is_active_sinkpad (GstInputSelector *
124 static GstPad *gst_input_selector_get_active_sinkpad (GstInputSelector * sel);
125 static GstPad *gst_input_selector_get_linked_pad (GstInputSelector * sel,
126 GstPad * pad, gboolean strict);
128 #define GST_TYPE_SELECTOR_PAD \
129 (gst_selector_pad_get_type())
130 #define GST_SELECTOR_PAD(obj) \
131 (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_SELECTOR_PAD, GstSelectorPad))
132 #define GST_SELECTOR_PAD_CLASS(klass) \
133 (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_SELECTOR_PAD, GstSelectorPadClass))
134 #define GST_IS_SELECTOR_PAD(obj) \
135 (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_SELECTOR_PAD))
136 #define GST_IS_SELECTOR_PAD_CLASS(klass) \
137 (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_SELECTOR_PAD))
138 #define GST_SELECTOR_PAD_CAST(obj) \
139 ((GstSelectorPad *)(obj))
141 typedef struct _GstSelectorPad GstSelectorPad;
142 typedef struct _GstSelectorPadClass GstSelectorPadClass;
143 typedef struct _GstSelectorPadCachedBuffer GstSelectorPadCachedBuffer;
145 struct _GstSelectorPad
149 gboolean pushed; /* when buffer was pushed downstream since activation */
150 guint group_id; /* Group ID from the last stream-start */
151 gboolean group_done; /* when Stream Group Done has been
153 gboolean eos; /* when EOS has been received */
154 gboolean eos_sent; /* when EOS was sent downstream */
155 gboolean discont; /* after switching we create a discont */
156 gboolean flushing; /* set after flush-start and before flush-stop */
158 GstTagList *tags; /* last tags received on the pad */
160 GstSegment segment; /* the current segment on the pad */
161 guint32 segment_seqnum; /* sequence number of the current segment */
163 gboolean events_pending; /* TRUE if sticky events need to be updated */
165 gboolean sending_cached_buffers;
166 GQueue *cached_buffers;
169 struct _GstSelectorPadCachedBuffer
175 struct _GstSelectorPadClass
180 GType gst_selector_pad_get_type (void);
181 static void gst_selector_pad_finalize (GObject * object);
182 static void gst_selector_pad_get_property (GObject * object,
183 guint prop_id, GValue * value, GParamSpec * pspec);
184 static void gst_selector_pad_set_property (GObject * object,
185 guint prop_id, const GValue * value, GParamSpec * pspec);
187 static gint64 gst_selector_pad_get_running_time (GstSelectorPad * pad);
188 static void gst_selector_pad_reset (GstSelectorPad * pad);
189 static gboolean gst_selector_pad_event (GstPad * pad, GstObject * parent,
191 static gboolean gst_selector_pad_query (GstPad * pad, GstObject * parent,
193 static GstIterator *gst_selector_pad_iterate_linked_pads (GstPad * pad,
195 static GstFlowReturn gst_selector_pad_chain (GstPad * pad, GstObject * parent,
197 static void gst_selector_pad_cache_buffer (GstSelectorPad * selpad,
199 static void gst_selector_pad_free_cached_buffers (GstSelectorPad * selpad);
201 G_DEFINE_TYPE (GstSelectorPad, gst_selector_pad, GST_TYPE_PAD);
204 gst_selector_pad_class_init (GstSelectorPadClass * klass)
206 GObjectClass *gobject_class;
208 gobject_class = (GObjectClass *) klass;
210 gobject_class->finalize = gst_selector_pad_finalize;
212 gobject_class->get_property = gst_selector_pad_get_property;
213 gobject_class->set_property = gst_selector_pad_set_property;
215 g_object_class_install_property (gobject_class, PROP_PAD_RUNNING_TIME,
216 g_param_spec_int64 ("running-time", "Running time",
217 "Running time of stream on pad", 0, G_MAXINT64, 0,
218 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
219 g_object_class_install_property (gobject_class, PROP_PAD_TAGS,
220 g_param_spec_boxed ("tags", "Tags",
221 "The currently active tags on the pad", GST_TYPE_TAG_LIST,
222 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
223 g_object_class_install_property (gobject_class, PROP_PAD_ACTIVE,
224 g_param_spec_boolean ("active", "Active",
225 "If the pad is currently active", FALSE,
226 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
227 /* FIXME: better property name? */
228 g_object_class_install_property (gobject_class, PROP_PAD_ALWAYS_OK,
229 g_param_spec_boolean ("always-ok", "Always OK",
230 "Make an inactive pad return OK instead of NOT_LINKED",
231 DEFAULT_PAD_ALWAYS_OK, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
235 gst_selector_pad_init (GstSelectorPad * pad)
237 pad->always_ok = DEFAULT_PAD_ALWAYS_OK;
238 gst_selector_pad_reset (pad);
242 gst_selector_pad_finalize (GObject * object)
246 pad = GST_SELECTOR_PAD_CAST (object);
249 gst_tag_list_unref (pad->tags);
250 gst_selector_pad_free_cached_buffers (pad);
252 G_OBJECT_CLASS (gst_selector_pad_parent_class)->finalize (object);
256 gst_selector_pad_set_property (GObject * object, guint prop_id,
257 const GValue * value, GParamSpec * pspec)
259 GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
262 case PROP_PAD_ALWAYS_OK:
263 GST_OBJECT_LOCK (object);
264 spad->always_ok = g_value_get_boolean (value);
265 GST_OBJECT_UNLOCK (object);
268 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
274 gst_selector_pad_get_property (GObject * object, guint prop_id,
275 GValue * value, GParamSpec * pspec)
277 GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
280 case PROP_PAD_RUNNING_TIME:
281 g_value_set_int64 (value, gst_selector_pad_get_running_time (spad));
284 GST_OBJECT_LOCK (object);
285 g_value_set_boxed (value, spad->tags);
286 GST_OBJECT_UNLOCK (object);
288 case PROP_PAD_ACTIVE:
290 GstInputSelector *sel;
292 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (spad));
294 g_value_set_boolean (value, gst_input_selector_is_active_sinkpad (sel,
295 GST_PAD_CAST (spad)));
296 gst_object_unref (sel);
298 g_value_set_boolean (value, FALSE);
302 case PROP_PAD_ALWAYS_OK:
303 GST_OBJECT_LOCK (object);
304 g_value_set_boolean (value, spad->always_ok);
305 GST_OBJECT_UNLOCK (object);
308 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
314 gst_selector_pad_get_running_time (GstSelectorPad * pad)
318 GST_OBJECT_LOCK (pad);
319 if (pad->segment.format == GST_FORMAT_TIME) {
321 gst_segment_to_running_time (&pad->segment, pad->segment.format,
322 pad->segment.position);
324 GST_OBJECT_UNLOCK (pad);
326 GST_DEBUG_OBJECT (pad, "running time: %" GST_TIME_FORMAT
327 " segment: %" GST_SEGMENT_FORMAT, GST_TIME_ARGS (ret), &pad->segment);
332 /* must be called with the SELECTOR_LOCK */
334 gst_selector_pad_reset (GstSelectorPad * pad)
336 GST_OBJECT_LOCK (pad);
338 pad->group_done = FALSE;
340 pad->eos_sent = FALSE;
341 pad->events_pending = FALSE;
342 pad->discont = FALSE;
343 pad->flushing = FALSE;
344 gst_segment_init (&pad->segment, GST_FORMAT_UNDEFINED);
345 pad->sending_cached_buffers = FALSE;
346 gst_selector_pad_free_cached_buffers (pad);
347 GST_OBJECT_UNLOCK (pad);
350 static GstSelectorPadCachedBuffer *
351 gst_selector_pad_new_cached_buffer (GstSelectorPad * selpad, GstBuffer * buffer)
353 GstSelectorPadCachedBuffer *cached_buffer =
354 g_slice_new (GstSelectorPadCachedBuffer);
355 cached_buffer->buffer = buffer;
356 cached_buffer->segment = selpad->segment;
357 return cached_buffer;
361 gst_selector_pad_free_cached_buffer (GstSelectorPadCachedBuffer * cached_buffer)
363 if (cached_buffer->buffer)
364 gst_buffer_unref (cached_buffer->buffer);
365 g_slice_free (GstSelectorPadCachedBuffer, cached_buffer);
368 /* must be called with the SELECTOR_LOCK */
370 gst_selector_pad_cache_buffer (GstSelectorPad * selpad, GstBuffer * buffer)
372 if (selpad->segment.format != GST_FORMAT_TIME) {
373 GST_DEBUG_OBJECT (selpad, "Buffer %p with segment not in time format, "
374 "not caching", buffer);
375 gst_buffer_unref (buffer);
379 GST_DEBUG_OBJECT (selpad, "Caching buffer %p", buffer);
380 if (!selpad->cached_buffers)
381 selpad->cached_buffers = g_queue_new ();
382 g_queue_push_tail (selpad->cached_buffers,
383 gst_selector_pad_new_cached_buffer (selpad, buffer));
386 /* must be called with the SELECTOR_LOCK */
388 gst_selector_pad_free_cached_buffers (GstSelectorPad * selpad)
390 if (!selpad->cached_buffers)
393 GST_DEBUG_OBJECT (selpad, "Freeing cached buffers");
394 g_queue_free_full (selpad->cached_buffers,
395 (GDestroyNotify) gst_selector_pad_free_cached_buffer);
396 selpad->cached_buffers = NULL;
399 /* strictly get the linked pad from the sinkpad. If the pad is active we return
400 * the srcpad else we return NULL */
402 gst_selector_pad_iterate_linked_pads (GstPad * pad, GstObject * parent)
404 GstInputSelector *sel;
406 GstIterator *it = NULL;
409 sel = GST_INPUT_SELECTOR (parent);
411 otherpad = gst_input_selector_get_linked_pad (sel, pad, TRUE);
413 g_value_init (&val, GST_TYPE_PAD);
414 g_value_set_object (&val, otherpad);
415 it = gst_iterator_new_single (GST_TYPE_PAD, &val);
416 g_value_unset (&val);
417 gst_object_unref (otherpad);
424 forward_sticky_events (GstPad * sinkpad, GstEvent ** event, gpointer user_data)
426 GstInputSelector *sel = GST_INPUT_SELECTOR (user_data);
428 GST_DEBUG_OBJECT (sinkpad, "forward sticky event %" GST_PTR_FORMAT, *event);
430 if (GST_EVENT_TYPE (*event) == GST_EVENT_SEGMENT) {
431 GstSegment *seg = &GST_SELECTOR_PAD (sinkpad)->segment;
434 e = gst_event_new_segment (seg);
435 gst_event_set_seqnum (e, GST_SELECTOR_PAD_CAST (sinkpad)->segment_seqnum);
437 gst_pad_push_event (sel->srcpad, e);
438 } else if (GST_EVENT_TYPE (*event) == GST_EVENT_STREAM_START
439 && !sel->have_group_id) {
441 gst_pad_get_sticky_event (sel->srcpad, GST_EVENT_STREAM_START, 0);
443 /* Only push stream-start once if not all our streams have a stream-id */
445 gst_pad_push_event (sel->srcpad, gst_event_ref (*event));
447 gst_event_unref (tmp);
450 gst_pad_push_event (sel->srcpad, gst_event_ref (*event));
457 gst_input_selector_eos_wait (GstInputSelector * self, GstSelectorPad * pad,
458 GstEvent * eos_event)
460 while (!self->eos && !self->flushing && !pad->flushing) {
461 GstPad *active_sinkpad;
462 active_sinkpad = gst_input_selector_get_active_sinkpad (self);
463 if (pad == GST_SELECTOR_PAD_CAST (active_sinkpad) && pad->eos
465 GST_DEBUG_OBJECT (pad, "send EOS event");
466 GST_INPUT_SELECTOR_UNLOCK (self);
467 /* if we have a pending events, push them now */
468 if (pad->events_pending) {
469 gst_pad_sticky_events_foreach (GST_PAD_CAST (pad),
470 forward_sticky_events, self);
471 pad->events_pending = FALSE;
474 gst_pad_push_event (self->srcpad, gst_event_ref (eos_event));
475 GST_INPUT_SELECTOR_LOCK (self);
476 /* Wake up other pads so they can continue when syncing to
477 * running time, as this pad just switched to EOS and
478 * may enable others to progress */
479 GST_INPUT_SELECTOR_BROADCAST (self);
480 pad->eos_sent = TRUE;
482 /* we can be unlocked here when we are shutting down (flushing) or when we
484 GST_INPUT_SELECTOR_WAIT (self);
488 return self->flushing;
492 gst_input_selector_all_eos (GstInputSelector * sel)
496 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = walk->next) {
497 GstSelectorPad *selpad;
499 selpad = GST_SELECTOR_PAD_CAST (walk->data);
510 gst_selector_pad_event (GstPad * pad, GstObject * parent, GstEvent * event)
514 gboolean new_tags = FALSE;
515 GstInputSelector *sel;
516 GstSelectorPad *selpad;
517 GstPad *prev_active_sinkpad;
518 GstPad *active_sinkpad;
520 sel = GST_INPUT_SELECTOR (parent);
521 selpad = GST_SELECTOR_PAD_CAST (pad);
522 GST_DEBUG_OBJECT (selpad, "received event %" GST_PTR_FORMAT, event);
524 GST_INPUT_SELECTOR_LOCK (sel);
525 prev_active_sinkpad =
526 sel->active_sinkpad ? gst_object_ref (sel->active_sinkpad) : NULL;
527 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
528 gst_object_ref (active_sinkpad);
529 GST_INPUT_SELECTOR_UNLOCK (sel);
531 if (prev_active_sinkpad != active_sinkpad) {
532 if (prev_active_sinkpad)
533 g_object_notify (G_OBJECT (prev_active_sinkpad), "active");
534 g_object_notify (G_OBJECT (active_sinkpad), "active");
535 g_object_notify (G_OBJECT (sel), "active-pad");
537 if (prev_active_sinkpad)
538 gst_object_unref (prev_active_sinkpad);
539 gst_object_unref (active_sinkpad);
541 GST_INPUT_SELECTOR_LOCK (sel);
542 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
544 /* only forward if we are dealing with the active sinkpad */
545 forward = (pad == active_sinkpad);
547 switch (GST_EVENT_TYPE (event)) {
548 case GST_EVENT_STREAM_START:{
549 if (!gst_event_parse_group_id (event, &selpad->group_id)) {
550 sel->have_group_id = FALSE;
551 selpad->group_id = 0;
555 case GST_EVENT_FLUSH_START:
556 /* Unblock the pad if it's waiting */
557 selpad->flushing = TRUE;
559 selpad->group_done = FALSE;
560 GST_INPUT_SELECTOR_BROADCAST (sel);
562 case GST_EVENT_FLUSH_STOP:
563 gst_selector_pad_reset (selpad);
565 case GST_EVENT_SEGMENT:
567 gst_event_copy_segment (event, &selpad->segment);
568 selpad->segment_seqnum = gst_event_get_seqnum (event);
570 GST_DEBUG_OBJECT (pad, "configured SEGMENT %" GST_SEGMENT_FORMAT,
576 GstTagList *tags, *oldtags, *newtags;
578 gst_event_parse_tag (event, &tags);
580 GST_OBJECT_LOCK (selpad);
581 oldtags = selpad->tags;
583 newtags = gst_tag_list_merge (oldtags, tags, GST_TAG_MERGE_REPLACE);
584 selpad->tags = newtags;
585 GST_OBJECT_UNLOCK (selpad);
588 gst_tag_list_unref (oldtags);
589 GST_DEBUG_OBJECT (pad, "received tags %" GST_PTR_FORMAT, newtags);
596 GST_DEBUG_OBJECT (pad, "received EOS");
597 if (gst_input_selector_all_eos (sel)) {
598 GST_DEBUG_OBJECT (pad, "All sink pad received EOS");
600 GST_INPUT_SELECTOR_BROADCAST (sel);
602 gst_input_selector_eos_wait (sel, selpad, event);
607 GstClockTime ts, dur;
609 GST_DEBUG_OBJECT (pad, "Received gap event: %" GST_PTR_FORMAT, event);
611 gst_event_parse_gap (event, &ts, &dur);
612 if (GST_CLOCK_TIME_IS_VALID (ts)) {
613 if (GST_CLOCK_TIME_IS_VALID (dur))
616 /* update the segment position */
617 GST_OBJECT_LOCK (pad);
618 selpad->segment.position = ts;
619 GST_OBJECT_UNLOCK (pad);
620 if (sel->sync_streams && active_sinkpad == pad)
621 GST_INPUT_SELECTOR_BROADCAST (sel);
626 case GST_EVENT_STREAM_GROUP_DONE:{
627 GST_DEBUG_OBJECT (sel, "Stream group-done in inputselector pad %s",
628 GST_OBJECT_NAME (selpad));
629 gst_event_parse_stream_group_done (event, &selpad->group_id);
630 selpad->group_done = TRUE;
631 if (sel->sync_streams && active_sinkpad == pad)
632 GST_INPUT_SELECTOR_BROADCAST (sel);
638 GST_INPUT_SELECTOR_UNLOCK (sel);
640 g_object_notify (G_OBJECT (selpad), "tags");
642 GST_DEBUG_OBJECT (pad, "forwarding event");
643 res = gst_pad_push_event (sel->srcpad, event);
645 /* If we aren't forwarding the event because the pad is not the
646 * active_sinkpad, then set the flag on the pad
647 * that says a segment needs sending if/when that pad is activated.
648 * For all other cases, we send the event immediately, which makes
649 * sparse streams and other segment updates work correctly downstream.
651 if (GST_EVENT_IS_STICKY (event))
652 selpad->events_pending = TRUE;
653 gst_event_unref (event);
660 gst_selector_pad_query (GstPad * pad, GstObject * parent, GstQuery * query)
662 gboolean res = FALSE;
663 GstInputSelector *self = (GstInputSelector *) parent;
665 switch (GST_QUERY_TYPE (query)) {
667 /* always proxy caps query, regardless of active pad or not */
668 res = gst_pad_peer_query (self->srcpad, query);
670 case GST_QUERY_ALLOCATION:{
671 GstPad *active_sinkpad;
672 GstInputSelector *sel = GST_INPUT_SELECTOR (parent);
674 /* Only do the allocation query for the active sinkpad,
675 * after switching a reconfigure event is sent and upstream
676 * should reconfigure and do a new allocation query
678 if (GST_PAD_DIRECTION (pad) == GST_PAD_SINK) {
679 GST_INPUT_SELECTOR_LOCK (sel);
680 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
681 GST_INPUT_SELECTOR_UNLOCK (sel);
683 if (pad != active_sinkpad) {
691 res = gst_pad_query_default (pad, parent, query);
700 gst_input_selector_get_clipped_running_time (GstSegment * seg, GstBuffer * buf)
702 GstClockTime running_time;
704 running_time = GST_BUFFER_PTS (buf);
705 /* If possible try to get the running time at the end of the buffer */
706 if (GST_BUFFER_DURATION_IS_VALID (buf))
707 running_time += GST_BUFFER_DURATION (buf);
708 /* Only use the segment to convert to running time if the segment is
709 * in TIME format, otherwise do our best to try to sync */
710 if (GST_CLOCK_TIME_IS_VALID (seg->stop)) {
711 if (running_time > seg->stop) {
712 running_time = seg->stop;
715 return gst_segment_to_running_time (seg, GST_FORMAT_TIME, running_time);
718 /* must be called without the SELECTOR_LOCK, will wait until the running time
719 * of the active pad is after this pad or return TRUE when flushing */
721 gst_input_selector_wait_running_time (GstInputSelector * sel,
722 GstSelectorPad * selpad, GstBuffer * buf)
726 GST_DEBUG_OBJECT (selpad, "entering wait for buffer %p", buf);
728 /* If we have no valid timestamp we can't sync this buffer */
729 if (!GST_BUFFER_PTS_IS_VALID (buf)) {
730 GST_DEBUG_OBJECT (selpad, "leaving wait for buffer with "
731 "invalid timestamp");
735 seg = &selpad->segment;
738 * a) this is the active pad
739 * b) the pad or the selector is flushing
740 * c) the buffer running time is before the current running time
741 * (either active-seg or clock, depending on sync-mode)
744 GST_INPUT_SELECTOR_LOCK (sel);
746 GstPad *active_sinkpad;
747 GstSelectorPad *active_selpad;
749 gint64 cur_running_time;
750 GstClockTime running_time;
752 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
753 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
755 if (seg->format != GST_FORMAT_TIME) {
756 GST_DEBUG_OBJECT (selpad,
757 "Not waiting because we don't have a TIME segment");
758 GST_INPUT_SELECTOR_UNLOCK (sel);
762 running_time = gst_input_selector_get_clipped_running_time (seg, buf);
763 /* If this is outside the segment don't sync */
764 if (running_time == -1) {
765 GST_DEBUG_OBJECT (selpad,
766 "Not waiting because buffer is outside segment");
767 GST_INPUT_SELECTOR_UNLOCK (sel);
771 cur_running_time = GST_CLOCK_TIME_NONE;
772 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
773 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
775 GstClockTime base_time;
777 cur_running_time = gst_clock_get_time (clock);
778 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
779 if (base_time <= cur_running_time)
780 cur_running_time -= base_time;
782 cur_running_time = 0;
784 gst_object_unref (clock);
787 GstSegment *active_seg;
789 active_seg = &active_selpad->segment;
791 /* If the active segment is configured but not to time format
792 * we can't do any syncing at all */
793 if ((active_seg->format != GST_FORMAT_TIME
794 && active_seg->format != GST_FORMAT_UNDEFINED)) {
795 GST_DEBUG_OBJECT (selpad,
796 "Not waiting because active segment isn't in TIME format");
797 GST_INPUT_SELECTOR_UNLOCK (sel);
801 /* Get active pad's running time, if no configured segment yet keep at -1 */
802 if (active_seg->format == GST_FORMAT_TIME)
803 cur_running_time = gst_segment_to_running_time (active_seg,
804 GST_FORMAT_TIME, active_seg->position);
807 /* Don't wait if the group is finished on the active pad,
808 * as the running time won't progress now */
809 if (selpad != active_selpad && active_selpad->group_done &&
810 selpad->group_id == active_selpad->group_id) {
811 GST_DEBUG_OBJECT (selpad, "Active pad received group-done. Unblocking");
812 GST_INPUT_SELECTOR_UNLOCK (sel);
816 if (selpad != active_selpad && !sel->eos && !sel->flushing
817 && !selpad->flushing && (cur_running_time == GST_CLOCK_TIME_NONE
818 || running_time >= cur_running_time)) {
819 GST_DEBUG_OBJECT (selpad,
820 "Waiting for active streams to advance. %" GST_TIME_FORMAT " >= %"
821 GST_TIME_FORMAT, GST_TIME_ARGS (running_time),
822 GST_TIME_ARGS (cur_running_time));
823 GST_INPUT_SELECTOR_WAIT (sel);
825 GST_INPUT_SELECTOR_UNLOCK (sel);
830 /* Return TRUE if the selector or the pad is flushing */
831 return (sel->flushing || selpad->flushing);
834 #if DEBUG_CACHED_BUFFERS
836 gst_input_selector_debug_cached_buffers (GstInputSelector * sel)
840 if (gst_debug_category_get_threshold (input_selector_debug) < GST_LEVEL_DEBUG)
843 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = walk->next) {
844 GstSelectorPad *selpad;
848 selpad = GST_SELECTOR_PAD_CAST (walk->data);
849 if (!selpad->cached_buffers) {
850 GST_DEBUG_OBJECT (selpad, "Cached buffers timestamps: <none>");
854 timestamps = g_string_new ("Cached buffers timestamps:");
855 for (l = selpad->cached_buffers->head; l != NULL; l = l->next) {
856 GstSelectorPadCachedBuffer *cached_buffer = l->data;
858 g_string_append_printf (timestamps, " %" GST_TIME_FORMAT,
859 GST_TIME_ARGS (GST_BUFFER_PTS (cached_buffer->buffer)));
861 GST_DEBUG_OBJECT (selpad, "%s", timestamps->str);
862 g_string_free (timestamps, TRUE);
867 /* must be called with the SELECTOR_LOCK */
869 gst_input_selector_cleanup_old_cached_buffers (GstInputSelector * sel,
873 gint64 cur_running_time;
876 cur_running_time = GST_CLOCK_TIME_NONE;
877 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
878 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
880 GstClockTime base_time;
882 cur_running_time = gst_clock_get_time (clock);
883 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
884 if (base_time <= cur_running_time)
885 cur_running_time -= base_time;
887 cur_running_time = 0;
889 gst_object_unref (clock);
892 GstPad *active_sinkpad;
893 GstSelectorPad *active_selpad;
894 GstSegment *active_seg;
896 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
897 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
898 active_seg = &active_selpad->segment;
900 /* Get active pad's running time, if no configured segment yet keep at -1 */
901 if (active_seg->format == GST_FORMAT_TIME)
902 cur_running_time = gst_segment_to_running_time (active_seg,
903 GST_FORMAT_TIME, active_seg->position);
906 if (!GST_CLOCK_TIME_IS_VALID (cur_running_time))
909 GST_DEBUG_OBJECT (sel, "Cleaning up old cached buffers");
910 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
911 GstSelectorPad *selpad;
913 GstSelectorPadCachedBuffer *cached_buffer;
914 GSList *maybe_remove;
915 guint queue_position;
917 selpad = GST_SELECTOR_PAD_CAST (walk->data);
918 if (!selpad->cached_buffers)
921 seg = &selpad->segment;
925 while ((cached_buffer = g_queue_peek_nth (selpad->cached_buffers,
927 GstBuffer *buffer = cached_buffer->buffer;
928 GstClockTime running_time;
931 /* If we have no valid timestamp we can't sync this buffer */
932 if (!GST_BUFFER_PTS_IS_VALID (buffer)) {
933 maybe_remove = g_slist_append (maybe_remove, cached_buffer);
934 queue_position = g_slist_length (maybe_remove);
938 /* the buffer is still valid if its duration is valid and the
939 * timestamp + duration is >= time, or if its duration is invalid
940 * and the timestamp is >= time */
941 running_time = gst_input_selector_get_clipped_running_time (seg, buffer);
942 GST_DEBUG_OBJECT (selpad,
943 "checking if buffer %p running time=%" GST_TIME_FORMAT
944 " >= stream time=%" GST_TIME_FORMAT, buffer,
945 GST_TIME_ARGS (running_time), GST_TIME_ARGS (cur_running_time));
946 if (running_time >= cur_running_time) {
950 GST_DEBUG_OBJECT (selpad, "Removing old cached buffer %p", buffer);
951 g_queue_pop_nth (selpad->cached_buffers, queue_position);
952 gst_selector_pad_free_cached_buffer (cached_buffer);
954 for (l = maybe_remove; l != NULL; l = g_slist_next (l)) {
955 /* A buffer after some invalid buffers was removed, it means the invalid buffers
956 * are old, lets also remove them */
957 cached_buffer = l->data;
958 g_queue_remove (selpad->cached_buffers, cached_buffer);
959 gst_selector_pad_free_cached_buffer (cached_buffer);
962 g_slist_free (maybe_remove);
967 g_slist_free (maybe_remove);
970 if (g_queue_is_empty (selpad->cached_buffers)) {
971 g_queue_free (selpad->cached_buffers);
972 selpad->cached_buffers = NULL;
976 #if DEBUG_CACHED_BUFFERS
977 gst_input_selector_debug_cached_buffers (sel);
982 gst_selector_pad_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
984 GstInputSelector *sel;
986 GstPad *active_sinkpad;
987 GstPad *prev_active_sinkpad = NULL;
988 GstSelectorPad *selpad;
990 sel = GST_INPUT_SELECTOR (parent);
991 selpad = GST_SELECTOR_PAD_CAST (pad);
993 GST_DEBUG_OBJECT (selpad,
994 "entering chain for buf %p with timestamp %" GST_TIME_FORMAT, buf,
995 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
997 GST_INPUT_SELECTOR_LOCK (sel);
1000 GST_INPUT_SELECTOR_UNLOCK (sel);
1004 GST_LOG_OBJECT (pad, "getting active pad");
1006 prev_active_sinkpad =
1007 sel->active_sinkpad ? gst_object_ref (sel->active_sinkpad) : NULL;
1008 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1010 /* In sync mode wait until the active pad has advanced
1011 * after the running time of the current buffer */
1012 if (sel->sync_streams) {
1013 /* call chain for each cached buffer if we are not the active pad
1014 * or if we are the active pad but didn't push anything yet. */
1015 if (active_sinkpad != pad || !selpad->pushed) {
1016 /* no need to check for sel->cache_buffers as selpad->cached_buffers
1017 * will only be valid if cache_buffers is TRUE */
1018 if (selpad->cached_buffers && !selpad->sending_cached_buffers) {
1019 GstSelectorPadCachedBuffer *cached_buffer;
1020 GstSegment saved_segment;
1022 saved_segment = selpad->segment;
1024 selpad->sending_cached_buffers = TRUE;
1025 while (!sel->eos && !sel->flushing && !selpad->flushing &&
1026 (cached_buffer = g_queue_pop_head (selpad->cached_buffers))) {
1027 GST_DEBUG_OBJECT (pad, "Cached buffers found, "
1028 "invoking chain for cached buffer %p", cached_buffer->buffer);
1030 selpad->segment = cached_buffer->segment;
1031 selpad->events_pending = TRUE;
1032 GST_INPUT_SELECTOR_UNLOCK (sel);
1033 gst_selector_pad_chain (pad, parent, cached_buffer->buffer);
1034 GST_INPUT_SELECTOR_LOCK (sel);
1036 /* We just passed the ownership of the buffer to the chain function */
1037 cached_buffer->buffer = NULL;
1038 gst_selector_pad_free_cached_buffer (cached_buffer);
1040 /* we may have cleaned up the queue in the meantime because of
1042 if (!selpad->cached_buffers) {
1046 selpad->sending_cached_buffers = FALSE;
1048 /* all cached buffers sent, restore segment for current buffer */
1049 selpad->segment = saved_segment;
1050 selpad->events_pending = TRUE;
1052 /* Might have changed while calling chain for cached buffers */
1053 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1057 if (active_sinkpad != pad) {
1058 GST_INPUT_SELECTOR_UNLOCK (sel);
1059 if (gst_input_selector_wait_running_time (sel, selpad, buf))
1061 GST_INPUT_SELECTOR_LOCK (sel);
1064 /* Might have changed while waiting */
1065 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1068 /* update the segment on the srcpad */
1069 if (GST_BUFFER_PTS_IS_VALID (buf)) {
1070 GstClockTime start_time = GST_BUFFER_PTS (buf);
1072 GST_LOG_OBJECT (pad, "received start time %" GST_TIME_FORMAT,
1073 GST_TIME_ARGS (start_time));
1074 if (GST_BUFFER_DURATION_IS_VALID (buf))
1075 GST_LOG_OBJECT (pad, "received end time %" GST_TIME_FORMAT,
1076 GST_TIME_ARGS (start_time + GST_BUFFER_DURATION (buf)));
1078 GST_OBJECT_LOCK (pad);
1079 selpad->segment.position = start_time;
1080 GST_OBJECT_UNLOCK (pad);
1083 /* Ignore buffers from pads except the selected one */
1084 if (pad != active_sinkpad)
1087 /* Tell all non-active pads that we advanced the running time */
1088 if (sel->sync_streams)
1089 GST_INPUT_SELECTOR_BROADCAST (sel);
1091 GST_INPUT_SELECTOR_UNLOCK (sel);
1093 if (prev_active_sinkpad != active_sinkpad) {
1094 if (prev_active_sinkpad)
1095 g_object_notify (G_OBJECT (prev_active_sinkpad), "active");
1096 g_object_notify (G_OBJECT (active_sinkpad), "active");
1097 g_object_notify (G_OBJECT (sel), "active-pad");
1100 /* if we have a pending events, push them now */
1101 if (G_UNLIKELY (prev_active_sinkpad != active_sinkpad
1102 || selpad->events_pending)) {
1103 gst_pad_sticky_events_foreach (GST_PAD_CAST (selpad), forward_sticky_events,
1105 selpad->events_pending = FALSE;
1108 if (prev_active_sinkpad) {
1109 gst_object_unref (prev_active_sinkpad);
1110 prev_active_sinkpad = NULL;
1113 if (selpad->discont) {
1114 buf = gst_buffer_make_writable (buf);
1116 GST_DEBUG_OBJECT (pad, "Marking discont buffer %p", buf);
1117 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
1118 selpad->discont = FALSE;
1122 GST_LOG_OBJECT (pad, "Forwarding buffer %p with timestamp %" GST_TIME_FORMAT,
1123 buf, GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
1125 /* Only make the buffer read-only when necessary */
1126 if (sel->sync_streams && sel->cache_buffers)
1127 buf = gst_buffer_ref (buf);
1128 res = gst_pad_push (sel->srcpad, buf);
1129 GST_LOG_OBJECT (pad, "Buffer %p forwarded result=%d", buf, res);
1131 GST_INPUT_SELECTOR_LOCK (sel);
1133 if (sel->sync_streams && sel->cache_buffers) {
1134 /* Might have changed while pushing */
1135 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1136 /* only set pad to pushed if we are still the active pad */
1137 if (active_sinkpad == pad)
1138 selpad->pushed = TRUE;
1140 /* cache buffer as we may need it again if we change pads */
1141 gst_selector_pad_cache_buffer (selpad, buf);
1142 gst_input_selector_cleanup_old_cached_buffers (sel, pad);
1144 selpad->pushed = TRUE;
1146 GST_INPUT_SELECTOR_UNLOCK (sel);
1150 if (prev_active_sinkpad)
1151 gst_object_unref (prev_active_sinkpad);
1152 prev_active_sinkpad = NULL;
1156 /* dropped buffers */
1159 gboolean active_pad_pushed = GST_SELECTOR_PAD_CAST (active_sinkpad)->pushed;
1161 GST_DEBUG_OBJECT (pad, "Pad not active, discard buffer %p", buf);
1162 /* when we drop a buffer, we're creating a discont on this pad */
1163 selpad->discont = TRUE;
1164 GST_INPUT_SELECTOR_UNLOCK (sel);
1165 gst_buffer_unref (buf);
1167 /* figure out what to return upstream */
1168 GST_OBJECT_LOCK (selpad);
1169 if (selpad->always_ok || !active_pad_pushed)
1172 res = GST_FLOW_NOT_LINKED;
1173 GST_OBJECT_UNLOCK (selpad);
1179 GST_DEBUG_OBJECT (pad, "We are flushing, discard buffer %p", buf);
1180 gst_buffer_unref (buf);
1181 res = GST_FLOW_FLUSHING;
1186 static void gst_input_selector_dispose (GObject * object);
1187 static void gst_input_selector_finalize (GObject * object);
1189 static void gst_input_selector_set_property (GObject * object,
1190 guint prop_id, const GValue * value, GParamSpec * pspec);
1191 static void gst_input_selector_get_property (GObject * object,
1192 guint prop_id, GValue * value, GParamSpec * pspec);
1194 static GstPad *gst_input_selector_request_new_pad (GstElement * element,
1195 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps);
1196 static void gst_input_selector_release_pad (GstElement * element, GstPad * pad);
1198 static GstStateChangeReturn gst_input_selector_change_state (GstElement *
1199 element, GstStateChange transition);
1201 static gboolean gst_input_selector_event (GstPad * pad, GstObject * parent,
1205 GST_DEBUG_CATEGORY_INIT (input_selector_debug, \
1206 "input-selector", 0, "An input stream selector element");
1207 #define gst_input_selector_parent_class parent_class
1208 G_DEFINE_TYPE_WITH_CODE (GstInputSelector, gst_input_selector, GST_TYPE_ELEMENT,
1212 gst_input_selector_class_init (GstInputSelectorClass * klass)
1214 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
1215 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
1217 gobject_class->dispose = gst_input_selector_dispose;
1218 gobject_class->finalize = gst_input_selector_finalize;
1220 gobject_class->set_property = gst_input_selector_set_property;
1221 gobject_class->get_property = gst_input_selector_get_property;
1223 g_object_class_install_property (gobject_class, PROP_N_PADS,
1224 g_param_spec_uint ("n-pads", "Number of Pads",
1225 "The number of sink pads", 0, G_MAXUINT, 0,
1226 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
1228 g_object_class_install_property (gobject_class, PROP_ACTIVE_PAD,
1229 g_param_spec_object ("active-pad", "Active pad",
1230 "The currently active sink pad", GST_TYPE_PAD,
1231 G_PARAM_READWRITE | GST_PARAM_MUTABLE_PLAYING |
1232 G_PARAM_STATIC_STRINGS));
1235 * GstInputSelector:sync-streams
1237 * If set to %TRUE all inactive streams will be synced to the
1238 * running time of the active stream or to the current clock.
1240 * To make sure no buffers are dropped by input-selector
1241 * that might be needed when switching the active pad,
1242 * sync-mode should be set to "clock" and cache-buffers to TRUE.
1244 g_object_class_install_property (gobject_class, PROP_SYNC_STREAMS,
1245 g_param_spec_boolean ("sync-streams", "Sync Streams",
1246 "Synchronize inactive streams to the running time of the active "
1247 "stream or to the current clock",
1248 DEFAULT_SYNC_STREAMS,
1249 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1250 GST_PARAM_MUTABLE_READY));
1253 * GstInputSelector:sync-mode
1255 * Select how input-selector will sync buffers when in sync-streams mode.
1257 * Note that when using the "active-segment" mode, the "active-segment" may
1258 * be ahead of current clock time when switching the active pad, as the current
1259 * active pad may have pushed more buffers than what was displayed/consumed,
1260 * which may cause delays and some missing buffers.
1262 g_object_class_install_property (gobject_class, PROP_SYNC_MODE,
1263 g_param_spec_enum ("sync-mode", "Sync mode",
1264 "Behavior in sync-streams mode", GST_TYPE_INPUT_SELECTOR_SYNC_MODE,
1266 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1267 GST_PARAM_MUTABLE_READY));
1270 * GstInputSelector:cache-buffers
1272 * If set to %TRUE and GstInputSelector:sync-streams is also set to %TRUE,
1273 * the active pad will cache the buffers still considered valid (after current
1274 * running time, see sync-mode) to avoid missing frames if/when the pad is
1277 * The active pad may push more buffers than what is currently displayed/consumed
1278 * and when changing pads those buffers will be discarded and the only way to
1279 * reactivate that pad without loosing the already consumed buffers is to enable cache.
1281 g_object_class_install_property (gobject_class, PROP_CACHE_BUFFERS,
1282 g_param_spec_boolean ("cache-buffers", "Cache Buffers",
1283 "Cache buffers for active-pad",
1284 DEFAULT_CACHE_BUFFERS,
1285 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1286 GST_PARAM_MUTABLE_READY));
1288 gst_element_class_set_static_metadata (gstelement_class, "Input selector",
1289 "Generic", "N-to-1 input stream selector",
1290 "Julien Moutte <julien@moutte.net>, "
1291 "Jan Schmidt <thaytan@mad.scientist.com>, "
1292 "Wim Taymans <wim.taymans@gmail.com>");
1293 gst_element_class_add_static_pad_template (gstelement_class,
1294 &gst_input_selector_sink_factory);
1295 gst_element_class_add_static_pad_template (gstelement_class,
1296 &gst_input_selector_src_factory);
1298 gstelement_class->request_new_pad = gst_input_selector_request_new_pad;
1299 gstelement_class->release_pad = gst_input_selector_release_pad;
1300 gstelement_class->change_state = gst_input_selector_change_state;
1304 gst_input_selector_init (GstInputSelector * sel)
1306 sel->srcpad = gst_pad_new ("src", GST_PAD_SRC);
1307 gst_pad_set_iterate_internal_links_function (sel->srcpad,
1308 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
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->sync_mode = DEFAULT_SYNC_MODE;
1318 sel->have_group_id = TRUE;
1320 g_mutex_init (&sel->lock);
1321 g_cond_init (&sel->cond);
1324 /* lets give a change for downstream to do something on
1325 * active-pad change before we start pushing new buffers */
1326 g_signal_connect_data (sel, "notify::active-pad",
1327 (GCallback) gst_input_selector_active_pad_changed, NULL,
1328 NULL, G_CONNECT_AFTER);
1332 gst_input_selector_dispose (GObject * object)
1334 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1336 if (sel->active_sinkpad) {
1337 gst_object_unref (sel->active_sinkpad);
1338 sel->active_sinkpad = NULL;
1340 G_OBJECT_CLASS (parent_class)->dispose (object);
1344 gst_input_selector_finalize (GObject * object)
1346 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1348 g_mutex_clear (&sel->lock);
1349 g_cond_clear (&sel->cond);
1351 G_OBJECT_CLASS (parent_class)->finalize (object);
1354 /* this function must be called with the SELECTOR_LOCK. It returns TRUE when the
1355 * active pad changed. */
1357 gst_input_selector_set_active_pad (GstInputSelector * self, GstPad * pad)
1359 GstSelectorPad *old, *new;
1360 GstPad **active_pad_p;
1362 if (pad == self->active_sinkpad)
1365 old = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
1366 new = GST_SELECTOR_PAD_CAST (pad);
1368 GST_DEBUG_OBJECT (self, "setting active pad to %s:%s",
1369 GST_DEBUG_PAD_NAME (new));
1372 old->pushed = FALSE;
1374 new->pushed = FALSE;
1376 /* Send a new SEGMENT event on the new pad next */
1377 if (old != new && new)
1378 new->events_pending = TRUE;
1380 active_pad_p = &self->active_sinkpad;
1381 gst_object_replace ((GstObject **) active_pad_p, GST_OBJECT_CAST (pad));
1383 if (old && old != new)
1384 gst_pad_push_event (GST_PAD_CAST (old), gst_event_new_reconfigure ());
1386 gst_pad_push_event (GST_PAD_CAST (new), gst_event_new_reconfigure ());
1388 GST_DEBUG_OBJECT (self, "New active pad is %" GST_PTR_FORMAT,
1389 self->active_sinkpad);
1391 if (old != new && new && new->eos) {
1392 new->eos_sent = FALSE;
1393 GST_INPUT_SELECTOR_BROADCAST (self);
1400 gst_input_selector_set_property (GObject * object, guint prop_id,
1401 const GValue * value, GParamSpec * pspec)
1403 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1406 case PROP_ACTIVE_PAD:
1410 pad = g_value_get_object (value);
1412 GST_INPUT_SELECTOR_LOCK (sel);
1414 #if DEBUG_CACHED_BUFFERS
1415 gst_input_selector_debug_cached_buffers (sel);
1418 gst_input_selector_set_active_pad (sel, pad);
1420 #if DEBUG_CACHED_BUFFERS
1421 gst_input_selector_debug_cached_buffers (sel);
1424 GST_INPUT_SELECTOR_UNLOCK (sel);
1427 case PROP_SYNC_STREAMS:
1428 GST_INPUT_SELECTOR_LOCK (sel);
1429 sel->sync_streams = g_value_get_boolean (value);
1430 GST_INPUT_SELECTOR_UNLOCK (sel);
1432 case PROP_SYNC_MODE:
1433 GST_INPUT_SELECTOR_LOCK (sel);
1434 sel->sync_mode = g_value_get_enum (value);
1435 GST_INPUT_SELECTOR_UNLOCK (sel);
1437 case PROP_CACHE_BUFFERS:
1438 GST_INPUT_SELECTOR_LOCK (object);
1439 sel->cache_buffers = g_value_get_boolean (value);
1440 GST_INPUT_SELECTOR_UNLOCK (object);
1443 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1449 gst_input_selector_active_pad_changed (GstInputSelector * sel,
1450 GParamSpec * pspec, gpointer user_data)
1452 /* Wake up all non-active pads in sync mode, they might be
1453 * the active pad now */
1454 if (sel->sync_streams)
1455 GST_INPUT_SELECTOR_BROADCAST (sel);
1459 gst_input_selector_get_property (GObject * object, guint prop_id,
1460 GValue * value, GParamSpec * pspec)
1462 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1466 GST_INPUT_SELECTOR_LOCK (object);
1467 g_value_set_uint (value, sel->n_pads);
1468 GST_INPUT_SELECTOR_UNLOCK (object);
1470 case PROP_ACTIVE_PAD:
1471 GST_INPUT_SELECTOR_LOCK (object);
1472 g_value_set_object (value, sel->active_sinkpad);
1473 GST_INPUT_SELECTOR_UNLOCK (object);
1475 case PROP_SYNC_STREAMS:
1476 GST_INPUT_SELECTOR_LOCK (object);
1477 g_value_set_boolean (value, sel->sync_streams);
1478 GST_INPUT_SELECTOR_UNLOCK (object);
1480 case PROP_SYNC_MODE:
1481 GST_INPUT_SELECTOR_LOCK (object);
1482 g_value_set_enum (value, sel->sync_mode);
1483 GST_INPUT_SELECTOR_UNLOCK (object);
1485 case PROP_CACHE_BUFFERS:
1486 GST_INPUT_SELECTOR_LOCK (object);
1487 g_value_set_boolean (value, sel->cache_buffers);
1488 GST_INPUT_SELECTOR_UNLOCK (object);
1491 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1497 gst_input_selector_get_linked_pad (GstInputSelector * sel, GstPad * pad,
1500 GstPad *otherpad = NULL;
1502 GST_INPUT_SELECTOR_LOCK (sel);
1503 if (pad == sel->srcpad)
1504 otherpad = sel->active_sinkpad;
1505 else if (pad == sel->active_sinkpad || !strict)
1506 otherpad = sel->srcpad;
1508 gst_object_ref (otherpad);
1509 GST_INPUT_SELECTOR_UNLOCK (sel);
1515 gst_input_selector_event (GstPad * pad, GstObject * parent, GstEvent * event)
1517 GstInputSelector *sel;
1518 gboolean result = FALSE;
1520 gboolean done = FALSE;
1521 GValue item = { 0, };
1523 GList *pushed_pads = NULL;
1525 sel = GST_INPUT_SELECTOR (parent);
1526 /* Send upstream events to all sinkpads */
1527 iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1529 /* This is now essentially a copy of gst_pad_event_default_dispatch
1530 * with a different iterator */
1532 switch (gst_iterator_next (iter, &item)) {
1533 case GST_ITERATOR_OK:
1534 eventpad = g_value_get_object (&item);
1536 /* if already pushed, skip */
1537 if (g_list_find (pushed_pads, eventpad)) {
1538 g_value_reset (&item);
1542 gst_event_ref (event);
1543 result |= gst_pad_push_event (eventpad, event);
1545 g_value_reset (&item);
1547 case GST_ITERATOR_RESYNC:
1548 /* We don't reset the result here because we don't push the event
1549 * again on pads that got the event already and because we need
1550 * to consider the result of the previous pushes */
1551 gst_iterator_resync (iter);
1553 case GST_ITERATOR_ERROR:
1554 GST_ERROR_OBJECT (pad, "Could not iterate over sinkpads");
1557 case GST_ITERATOR_DONE:
1562 g_value_unset (&item);
1563 gst_iterator_free (iter);
1565 g_list_free (pushed_pads);
1567 gst_event_unref (event);
1572 /* check if the pad is the active sinkpad */
1573 static inline gboolean
1574 gst_input_selector_is_active_sinkpad (GstInputSelector * sel, GstPad * pad)
1578 GST_INPUT_SELECTOR_LOCK (sel);
1579 res = (pad == sel->active_sinkpad);
1580 GST_INPUT_SELECTOR_UNLOCK (sel);
1585 /* Get or create the active sinkpad, must be called with SELECTOR_LOCK */
1587 gst_input_selector_get_active_sinkpad (GstInputSelector * sel)
1589 GstPad *active_sinkpad;
1591 active_sinkpad = sel->active_sinkpad;
1592 if (active_sinkpad == NULL) {
1593 GValue item = G_VALUE_INIT;
1594 GstIterator *iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1595 GstIteratorResult ires;
1597 while ((ires = gst_iterator_next (iter, &item)) == GST_ITERATOR_RESYNC)
1598 gst_iterator_resync (iter);
1599 if (ires == GST_ITERATOR_OK) {
1600 /* If no pad is currently selected, we return the first usable pad to
1601 * guarantee consistency */
1603 active_sinkpad = sel->active_sinkpad = g_value_dup_object (&item);
1604 g_value_reset (&item);
1605 GST_DEBUG_OBJECT (sel, "Activating pad %s:%s",
1606 GST_DEBUG_PAD_NAME (active_sinkpad));
1608 GST_WARNING_OBJECT (sel, "Couldn't find a default sink pad");
1609 gst_iterator_free (iter);
1612 return active_sinkpad;
1616 gst_input_selector_request_new_pad (GstElement * element,
1617 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps)
1619 GstInputSelector *sel;
1621 GstPad *sinkpad = NULL;
1623 g_return_val_if_fail (templ->direction == GST_PAD_SINK, NULL);
1625 sel = GST_INPUT_SELECTOR (element);
1627 GST_INPUT_SELECTOR_LOCK (sel);
1629 GST_LOG_OBJECT (sel, "Creating new pad sink_%u", sel->padcount);
1630 name = g_strdup_printf ("sink_%u", sel->padcount++);
1631 sinkpad = g_object_new (GST_TYPE_SELECTOR_PAD,
1632 "name", name, "direction", templ->direction, "template", templ, NULL);
1637 gst_pad_set_event_function (sinkpad,
1638 GST_DEBUG_FUNCPTR (gst_selector_pad_event));
1639 gst_pad_set_query_function (sinkpad,
1640 GST_DEBUG_FUNCPTR (gst_selector_pad_query));
1641 gst_pad_set_chain_function (sinkpad,
1642 GST_DEBUG_FUNCPTR (gst_selector_pad_chain));
1643 gst_pad_set_iterate_internal_links_function (sinkpad,
1644 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1646 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_CAPS);
1647 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_ALLOCATION);
1648 gst_pad_set_active (sinkpad, TRUE);
1649 gst_element_add_pad (GST_ELEMENT (sel), sinkpad);
1650 GST_INPUT_SELECTOR_UNLOCK (sel);
1656 gst_input_selector_release_pad (GstElement * element, GstPad * pad)
1658 GstInputSelector *sel;
1660 sel = GST_INPUT_SELECTOR (element);
1661 GST_LOG_OBJECT (sel, "Releasing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1663 GST_INPUT_SELECTOR_LOCK (sel);
1664 /* if the pad was the active pad, makes us select a new one */
1665 if (sel->active_sinkpad == pad) {
1666 GST_DEBUG_OBJECT (sel, "Deactivating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1667 gst_object_unref (sel->active_sinkpad);
1668 sel->active_sinkpad = NULL;
1671 GST_INPUT_SELECTOR_UNLOCK (sel);
1673 gst_pad_set_active (pad, FALSE);
1674 gst_element_remove_pad (GST_ELEMENT (sel), pad);
1678 gst_input_selector_reset (GstInputSelector * sel)
1682 GST_INPUT_SELECTOR_LOCK (sel);
1683 /* clear active pad */
1684 if (sel->active_sinkpad) {
1685 gst_object_unref (sel->active_sinkpad);
1686 sel->active_sinkpad = NULL;
1688 sel->eos_sent = FALSE;
1690 /* reset each of our sinkpads state */
1691 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
1692 GstSelectorPad *selpad = GST_SELECTOR_PAD_CAST (walk->data);
1694 gst_selector_pad_reset (selpad);
1697 gst_tag_list_unref (selpad->tags);
1698 selpad->tags = NULL;
1701 sel->have_group_id = TRUE;
1702 GST_INPUT_SELECTOR_UNLOCK (sel);
1705 static GstStateChangeReturn
1706 gst_input_selector_change_state (GstElement * element,
1707 GstStateChange transition)
1709 GstInputSelector *self = GST_INPUT_SELECTOR (element);
1710 GstStateChangeReturn result;
1712 switch (transition) {
1713 case GST_STATE_CHANGE_READY_TO_PAUSED:
1714 GST_INPUT_SELECTOR_LOCK (self);
1716 self->flushing = FALSE;
1717 GST_INPUT_SELECTOR_UNLOCK (self);
1719 case GST_STATE_CHANGE_PAUSED_TO_READY:
1720 /* first unlock before we call the parent state change function, which
1721 * tries to acquire the stream lock when going to ready. */
1722 GST_INPUT_SELECTOR_LOCK (self);
1724 self->flushing = TRUE;
1725 GST_INPUT_SELECTOR_BROADCAST (self);
1726 GST_INPUT_SELECTOR_UNLOCK (self);
1732 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1734 switch (transition) {
1735 case GST_STATE_CHANGE_PAUSED_TO_READY:
1736 gst_input_selector_reset (self);