1 /* GStreamer input selector
2 * Copyright (C) 2003 Julien Moutte <julien@moutte.net>
3 * Copyright (C) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
4 * Copyright (C) 2005 Jan Schmidt <thaytan@mad.scientist.com>
5 * Copyright (C) 2007 Wim Taymans <wim.taymans@gmail.com>
6 * Copyright (C) 2007 Andy Wingo <wingo@pobox.com>
7 * Copyright (C) 2008 Nokia Corporation. (contact <stefan.kost@nokia.com>)
8 * Copyright (C) 2011 Sebastian Dröge <sebastian.droege@collabora.co.uk>
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Library General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Library General Public License for more details.
20 * You should have received a copy of the GNU Library General Public
21 * License along with this library; if not, write to the
22 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
23 * Boston, MA 02110-1301, USA.
27 * SECTION:element-input-selector
28 * @title: input-selector
29 * @see_also: #GstOutputSelector
31 * Direct one out of N input streams to the output pad.
33 * The input pads are from a GstPad subclass and have additional
34 * properties, which users may find useful, namely:
36 * * "running-time": Running time of stream on pad (#gint64)
37 * * "tags": The currently active tags on the pad (#GstTagList, boxed type)
38 * * "active": If the pad is currently active (#gboolean)
39 * * "always-ok" : Make an inactive pads return #GST_FLOW_OK instead of
40 * #GST_FLOW_NOT_LINKED
50 #include "gstinputselector.h"
52 #define DEBUG_CACHED_BUFFERS 0
54 GST_DEBUG_CATEGORY_STATIC (input_selector_debug);
55 #define GST_CAT_DEFAULT input_selector_debug
57 #define GST_TYPE_INPUT_SELECTOR_SYNC_MODE (gst_input_selector_sync_mode_get_type())
59 gst_input_selector_sync_mode_get_type (void)
61 static GType type = 0;
62 static const GEnumValue data[] = {
63 {GST_INPUT_SELECTOR_SYNC_MODE_ACTIVE_SEGMENT,
64 "Sync using the current active segment",
66 {GST_INPUT_SELECTOR_SYNC_MODE_CLOCK, "Sync using the clock", "clock"},
71 type = g_enum_register_static ("GstInputSelectorSyncMode", data);
76 #define GST_INPUT_SELECTOR_GET_LOCK(sel) (&((GstInputSelector*)(sel))->lock)
77 #define GST_INPUT_SELECTOR_GET_COND(sel) (&((GstInputSelector*)(sel))->cond)
78 #define GST_INPUT_SELECTOR_LOCK(sel) (g_mutex_lock (GST_INPUT_SELECTOR_GET_LOCK(sel)))
79 #define GST_INPUT_SELECTOR_UNLOCK(sel) (g_mutex_unlock (GST_INPUT_SELECTOR_GET_LOCK(sel)))
80 #define GST_INPUT_SELECTOR_WAIT(sel) (g_cond_wait (GST_INPUT_SELECTOR_GET_COND(sel), \
81 GST_INPUT_SELECTOR_GET_LOCK(sel)))
82 #define GST_INPUT_SELECTOR_BROADCAST(sel) (g_cond_broadcast (GST_INPUT_SELECTOR_GET_COND(sel)))
84 static GstStaticPadTemplate gst_input_selector_sink_factory =
85 GST_STATIC_PAD_TEMPLATE ("sink_%u",
90 static GstStaticPadTemplate gst_input_selector_src_factory =
91 GST_STATIC_PAD_TEMPLATE ("src",
106 #define DEFAULT_SYNC_STREAMS TRUE
107 #define DEFAULT_SYNC_MODE GST_INPUT_SELECTOR_SYNC_MODE_ACTIVE_SEGMENT
108 #define DEFAULT_CACHE_BUFFERS FALSE
109 #define DEFAULT_PAD_ALWAYS_OK TRUE
114 PROP_PAD_RUNNING_TIME,
120 static void gst_input_selector_active_pad_changed (GstInputSelector * sel,
121 GParamSpec * pspec, gpointer user_data);
122 static inline gboolean gst_input_selector_is_active_sinkpad (GstInputSelector *
124 static GstPad *gst_input_selector_get_active_sinkpad (GstInputSelector * sel);
125 static GstPad *gst_input_selector_get_linked_pad (GstInputSelector * sel,
126 GstPad * pad, gboolean strict);
128 #define GST_TYPE_SELECTOR_PAD \
129 (gst_selector_pad_get_type())
130 #define GST_SELECTOR_PAD(obj) \
131 (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_SELECTOR_PAD, GstSelectorPad))
132 #define GST_SELECTOR_PAD_CLASS(klass) \
133 (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_SELECTOR_PAD, GstSelectorPadClass))
134 #define GST_IS_SELECTOR_PAD(obj) \
135 (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_SELECTOR_PAD))
136 #define GST_IS_SELECTOR_PAD_CLASS(klass) \
137 (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_SELECTOR_PAD))
138 #define GST_SELECTOR_PAD_CAST(obj) \
139 ((GstSelectorPad *)(obj))
141 typedef struct _GstSelectorPad GstSelectorPad;
142 typedef struct _GstSelectorPadClass GstSelectorPadClass;
143 typedef struct _GstSelectorPadCachedBuffer GstSelectorPadCachedBuffer;
145 struct _GstSelectorPad
149 gboolean pushed; /* when buffer was pushed downstream since activation */
150 guint group_id; /* Group ID from the last stream-start */
151 gboolean group_done; /* when Stream Group Done has been
153 gboolean eos; /* when EOS has been received */
154 gboolean eos_sent; /* when EOS was sent downstream */
155 gboolean discont; /* after switching we create a discont */
156 gboolean flushing; /* set after flush-start and before flush-stop */
158 GstTagList *tags; /* last tags received on the pad */
160 GstSegment segment; /* the current segment on the pad */
161 guint32 segment_seqnum; /* sequence number of the current segment */
163 gboolean events_pending; /* TRUE if sticky events need to be updated */
165 gboolean sending_cached_buffers;
166 GQueue *cached_buffers;
169 struct _GstSelectorPadCachedBuffer
175 struct _GstSelectorPadClass
180 GType gst_selector_pad_get_type (void);
181 static void gst_selector_pad_finalize (GObject * object);
182 static void gst_selector_pad_get_property (GObject * object,
183 guint prop_id, GValue * value, GParamSpec * pspec);
184 static void gst_selector_pad_set_property (GObject * object,
185 guint prop_id, const GValue * value, GParamSpec * pspec);
187 static gint64 gst_selector_pad_get_running_time (GstSelectorPad * pad);
188 static void gst_selector_pad_reset (GstSelectorPad * pad);
189 static gboolean gst_selector_pad_event (GstPad * pad, GstObject * parent,
191 static gboolean gst_selector_pad_query (GstPad * pad, GstObject * parent,
193 static GstIterator *gst_selector_pad_iterate_linked_pads (GstPad * pad,
195 static GstFlowReturn gst_selector_pad_chain (GstPad * pad, GstObject * parent,
197 static void gst_selector_pad_cache_buffer (GstSelectorPad * selpad,
199 static void gst_selector_pad_free_cached_buffers (GstSelectorPad * selpad);
201 G_DEFINE_TYPE (GstSelectorPad, gst_selector_pad, GST_TYPE_PAD);
204 gst_selector_pad_class_init (GstSelectorPadClass * klass)
206 GObjectClass *gobject_class;
208 gobject_class = (GObjectClass *) klass;
210 gobject_class->finalize = gst_selector_pad_finalize;
212 gobject_class->get_property = gst_selector_pad_get_property;
213 gobject_class->set_property = gst_selector_pad_set_property;
215 g_object_class_install_property (gobject_class, PROP_PAD_RUNNING_TIME,
216 g_param_spec_int64 ("running-time", "Running time",
217 "Running time of stream on pad", 0, G_MAXINT64, 0,
218 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
219 g_object_class_install_property (gobject_class, PROP_PAD_TAGS,
220 g_param_spec_boxed ("tags", "Tags",
221 "The currently active tags on the pad", GST_TYPE_TAG_LIST,
222 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
223 g_object_class_install_property (gobject_class, PROP_PAD_ACTIVE,
224 g_param_spec_boolean ("active", "Active",
225 "If the pad is currently active", FALSE,
226 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
227 /* FIXME: better property name? */
228 g_object_class_install_property (gobject_class, PROP_PAD_ALWAYS_OK,
229 g_param_spec_boolean ("always-ok", "Always OK",
230 "Make an inactive pad return OK instead of NOT_LINKED",
231 DEFAULT_PAD_ALWAYS_OK, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
235 gst_selector_pad_init (GstSelectorPad * pad)
237 pad->always_ok = DEFAULT_PAD_ALWAYS_OK;
238 gst_selector_pad_reset (pad);
242 gst_selector_pad_finalize (GObject * object)
246 pad = GST_SELECTOR_PAD_CAST (object);
249 gst_tag_list_unref (pad->tags);
250 gst_selector_pad_free_cached_buffers (pad);
252 G_OBJECT_CLASS (gst_selector_pad_parent_class)->finalize (object);
256 gst_selector_pad_set_property (GObject * object, guint prop_id,
257 const GValue * value, GParamSpec * pspec)
259 GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
262 case PROP_PAD_ALWAYS_OK:
263 GST_OBJECT_LOCK (object);
264 spad->always_ok = g_value_get_boolean (value);
265 GST_OBJECT_UNLOCK (object);
268 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
274 gst_selector_pad_get_property (GObject * object, guint prop_id,
275 GValue * value, GParamSpec * pspec)
277 GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
280 case PROP_PAD_RUNNING_TIME:
281 g_value_set_int64 (value, gst_selector_pad_get_running_time (spad));
284 GST_OBJECT_LOCK (object);
285 g_value_set_boxed (value, spad->tags);
286 GST_OBJECT_UNLOCK (object);
288 case PROP_PAD_ACTIVE:
290 GstInputSelector *sel;
292 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (spad));
294 g_value_set_boolean (value, gst_input_selector_is_active_sinkpad (sel,
295 GST_PAD_CAST (spad)));
296 gst_object_unref (sel);
298 g_value_set_boolean (value, FALSE);
302 case PROP_PAD_ALWAYS_OK:
303 GST_OBJECT_LOCK (object);
304 g_value_set_boolean (value, spad->always_ok);
305 GST_OBJECT_UNLOCK (object);
308 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
314 gst_selector_pad_get_running_time (GstSelectorPad * pad)
318 GST_OBJECT_LOCK (pad);
319 if (pad->segment.format == GST_FORMAT_TIME) {
321 gst_segment_to_running_time (&pad->segment, pad->segment.format,
322 pad->segment.position);
324 GST_OBJECT_UNLOCK (pad);
326 GST_DEBUG_OBJECT (pad, "running time: %" GST_TIME_FORMAT
327 " segment: %" GST_SEGMENT_FORMAT, GST_TIME_ARGS (ret), &pad->segment);
332 /* must be called with the SELECTOR_LOCK */
334 gst_selector_pad_reset (GstSelectorPad * pad)
336 GST_OBJECT_LOCK (pad);
338 pad->group_done = FALSE;
340 pad->eos_sent = FALSE;
341 pad->events_pending = FALSE;
342 pad->discont = FALSE;
343 pad->flushing = FALSE;
344 gst_segment_init (&pad->segment, GST_FORMAT_UNDEFINED);
345 pad->sending_cached_buffers = FALSE;
346 gst_selector_pad_free_cached_buffers (pad);
347 GST_OBJECT_UNLOCK (pad);
350 static GstSelectorPadCachedBuffer *
351 gst_selector_pad_new_cached_buffer (GstSelectorPad * selpad, GstBuffer * buffer)
353 GstSelectorPadCachedBuffer *cached_buffer =
354 g_slice_new (GstSelectorPadCachedBuffer);
355 cached_buffer->buffer = buffer;
356 cached_buffer->segment = selpad->segment;
357 return cached_buffer;
361 gst_selector_pad_free_cached_buffer (GstSelectorPadCachedBuffer * cached_buffer)
363 if (cached_buffer->buffer)
364 gst_buffer_unref (cached_buffer->buffer);
365 g_slice_free (GstSelectorPadCachedBuffer, cached_buffer);
368 /* must be called with the SELECTOR_LOCK */
370 gst_selector_pad_cache_buffer (GstSelectorPad * selpad, GstBuffer * buffer)
372 if (selpad->segment.format != GST_FORMAT_TIME) {
373 GST_DEBUG_OBJECT (selpad, "Buffer %p with segment not in time format, "
374 "not caching", buffer);
375 gst_buffer_unref (buffer);
379 GST_DEBUG_OBJECT (selpad, "Caching buffer %p", buffer);
380 if (!selpad->cached_buffers)
381 selpad->cached_buffers = g_queue_new ();
382 g_queue_push_tail (selpad->cached_buffers,
383 gst_selector_pad_new_cached_buffer (selpad, buffer));
386 /* must be called with the SELECTOR_LOCK */
388 gst_selector_pad_free_cached_buffers (GstSelectorPad * selpad)
390 if (!selpad->cached_buffers)
393 GST_DEBUG_OBJECT (selpad, "Freeing cached buffers");
394 g_queue_free_full (selpad->cached_buffers,
395 (GDestroyNotify) gst_selector_pad_free_cached_buffer);
396 selpad->cached_buffers = NULL;
399 /* strictly get the linked pad from the sinkpad. If the pad is active we return
400 * the srcpad else we return NULL */
402 gst_selector_pad_iterate_linked_pads (GstPad * pad, GstObject * parent)
404 GstInputSelector *sel;
406 GstIterator *it = NULL;
409 sel = GST_INPUT_SELECTOR (parent);
411 otherpad = gst_input_selector_get_linked_pad (sel, pad, TRUE);
413 g_value_init (&val, GST_TYPE_PAD);
414 g_value_set_object (&val, otherpad);
415 it = gst_iterator_new_single (GST_TYPE_PAD, &val);
416 g_value_unset (&val);
417 gst_object_unref (otherpad);
424 forward_sticky_events (GstPad * sinkpad, GstEvent ** event, gpointer user_data)
426 GstInputSelector *sel = GST_INPUT_SELECTOR (user_data);
428 GST_DEBUG_OBJECT (sinkpad, "forward sticky event %" GST_PTR_FORMAT, *event);
430 if (GST_EVENT_TYPE (*event) == GST_EVENT_SEGMENT) {
431 GstSegment *seg = &GST_SELECTOR_PAD (sinkpad)->segment;
434 e = gst_event_new_segment (seg);
435 gst_event_set_seqnum (e, GST_SELECTOR_PAD_CAST (sinkpad)->segment_seqnum);
437 gst_pad_push_event (sel->srcpad, e);
438 } else if (GST_EVENT_TYPE (*event) == GST_EVENT_STREAM_START
439 && !sel->have_group_id) {
441 gst_pad_get_sticky_event (sel->srcpad, GST_EVENT_STREAM_START, 0);
443 /* Only push stream-start once if not all our streams have a stream-id */
445 gst_pad_push_event (sel->srcpad, gst_event_ref (*event));
447 gst_event_unref (tmp);
450 gst_pad_push_event (sel->srcpad, gst_event_ref (*event));
457 gst_input_selector_eos_wait (GstInputSelector * self, GstSelectorPad * pad,
458 GstEvent * eos_event)
460 while (!self->eos && !self->flushing && !pad->flushing) {
461 GstPad *active_sinkpad;
462 active_sinkpad = gst_input_selector_get_active_sinkpad (self);
463 if (pad == GST_SELECTOR_PAD_CAST (active_sinkpad) && pad->eos
465 GST_DEBUG_OBJECT (pad, "send EOS event");
466 GST_INPUT_SELECTOR_UNLOCK (self);
467 /* if we have a pending events, push them now */
468 if (pad->events_pending) {
469 gst_pad_sticky_events_foreach (GST_PAD_CAST (pad),
470 forward_sticky_events, self);
471 pad->events_pending = FALSE;
474 gst_pad_push_event (self->srcpad, gst_event_ref (eos_event));
475 GST_INPUT_SELECTOR_LOCK (self);
476 /* Wake up other pads so they can continue when syncing to
477 * running time, as this pad just switched to EOS and
478 * may enable others to progress */
479 GST_INPUT_SELECTOR_BROADCAST (self);
480 pad->eos_sent = TRUE;
482 /* we can be unlocked here when we are shutting down (flushing) or when we
484 GST_INPUT_SELECTOR_WAIT (self);
488 return self->flushing;
492 gst_input_selector_all_eos (GstInputSelector * sel)
496 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = walk->next) {
497 GstSelectorPad *selpad;
499 selpad = GST_SELECTOR_PAD_CAST (walk->data);
510 gst_selector_pad_event (GstPad * pad, GstObject * parent, GstEvent * event)
514 gboolean new_tags = FALSE;
515 GstInputSelector *sel;
516 GstSelectorPad *selpad;
517 GstPad *prev_active_sinkpad;
518 GstPad *active_sinkpad;
520 sel = GST_INPUT_SELECTOR (parent);
521 selpad = GST_SELECTOR_PAD_CAST (pad);
522 GST_DEBUG_OBJECT (selpad, "received event %" GST_PTR_FORMAT, event);
524 GST_INPUT_SELECTOR_LOCK (sel);
525 prev_active_sinkpad =
526 sel->active_sinkpad ? gst_object_ref (sel->active_sinkpad) : NULL;
527 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
528 gst_object_ref (active_sinkpad);
529 GST_INPUT_SELECTOR_UNLOCK (sel);
531 if (prev_active_sinkpad != active_sinkpad) {
532 if (prev_active_sinkpad)
533 g_object_notify (G_OBJECT (prev_active_sinkpad), "active");
534 g_object_notify (G_OBJECT (active_sinkpad), "active");
535 g_object_notify (G_OBJECT (sel), "active-pad");
537 if (prev_active_sinkpad)
538 gst_object_unref (prev_active_sinkpad);
539 gst_object_unref (active_sinkpad);
541 GST_INPUT_SELECTOR_LOCK (sel);
542 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
544 /* only forward if we are dealing with the active sinkpad */
545 forward = (pad == active_sinkpad);
547 switch (GST_EVENT_TYPE (event)) {
548 case GST_EVENT_STREAM_START:{
549 if (!gst_event_parse_group_id (event, &selpad->group_id)) {
550 sel->have_group_id = FALSE;
551 selpad->group_id = 0;
555 case GST_EVENT_FLUSH_START:
556 /* Unblock the pad if it's waiting */
557 selpad->flushing = TRUE;
559 selpad->group_done = FALSE;
560 GST_INPUT_SELECTOR_BROADCAST (sel);
562 case GST_EVENT_FLUSH_STOP:
563 gst_selector_pad_reset (selpad);
565 case GST_EVENT_SEGMENT:
567 gst_event_copy_segment (event, &selpad->segment);
568 selpad->segment_seqnum = gst_event_get_seqnum (event);
570 GST_DEBUG_OBJECT (pad, "configured SEGMENT %" GST_SEGMENT_FORMAT,
576 GstTagList *tags, *oldtags, *newtags;
578 gst_event_parse_tag (event, &tags);
580 GST_OBJECT_LOCK (selpad);
581 oldtags = selpad->tags;
583 newtags = gst_tag_list_merge (oldtags, tags, GST_TAG_MERGE_REPLACE);
584 selpad->tags = newtags;
585 GST_OBJECT_UNLOCK (selpad);
588 gst_tag_list_unref (oldtags);
589 GST_DEBUG_OBJECT (pad, "received tags %" GST_PTR_FORMAT, newtags);
596 GST_DEBUG_OBJECT (pad, "received EOS");
597 if (gst_input_selector_all_eos (sel)) {
598 GST_DEBUG_OBJECT (pad, "All sink pad received EOS");
600 GST_INPUT_SELECTOR_BROADCAST (sel);
602 gst_input_selector_eos_wait (sel, selpad, event);
607 GstClockTime ts, dur;
609 GST_DEBUG_OBJECT (pad, "Received gap event: %" GST_PTR_FORMAT, event);
611 gst_event_parse_gap (event, &ts, &dur);
612 if (GST_CLOCK_TIME_IS_VALID (ts)) {
613 if (GST_CLOCK_TIME_IS_VALID (dur))
616 /* update the segment position */
617 GST_OBJECT_LOCK (pad);
618 selpad->segment.position = ts;
619 GST_OBJECT_UNLOCK (pad);
620 if (sel->sync_streams && active_sinkpad == pad)
621 GST_INPUT_SELECTOR_BROADCAST (sel);
626 case GST_EVENT_STREAM_GROUP_DONE:{
627 GST_DEBUG_OBJECT (sel, "Stream group-done in inputselector pad %s",
628 GST_OBJECT_NAME (selpad));
629 gst_event_parse_stream_group_done (event, &selpad->group_id);
630 selpad->group_done = TRUE;
631 if (sel->sync_streams && active_sinkpad == pad)
632 GST_INPUT_SELECTOR_BROADCAST (sel);
638 GST_INPUT_SELECTOR_UNLOCK (sel);
640 g_object_notify (G_OBJECT (selpad), "tags");
642 GST_DEBUG_OBJECT (pad, "forwarding event");
643 res = gst_pad_push_event (sel->srcpad, event);
645 /* If we aren't forwarding the event because the pad is not the
646 * active_sinkpad, then set the flag on the pad
647 * that says a segment needs sending if/when that pad is activated.
648 * For all other cases, we send the event immediately, which makes
649 * sparse streams and other segment updates work correctly downstream.
651 if (GST_EVENT_IS_STICKY (event))
652 selpad->events_pending = TRUE;
653 gst_event_unref (event);
660 gst_selector_pad_query (GstPad * pad, GstObject * parent, GstQuery * query)
662 gboolean res = FALSE;
663 GstInputSelector *self = (GstInputSelector *) parent;
665 switch (GST_QUERY_TYPE (query)) {
667 case GST_QUERY_POSITION:
668 case GST_QUERY_DURATION:
669 case GST_QUERY_CONTEXT:
670 /* always proxy caps/position/duration/context queries, regardless of active pad or not
671 * See https://bugzilla.gnome.org/show_bug.cgi?id=775445 */
672 res = gst_pad_peer_query (self->srcpad, query);
674 case GST_QUERY_ALLOCATION:{
675 GstPad *active_sinkpad;
676 GstInputSelector *sel = GST_INPUT_SELECTOR (parent);
678 /* Only do the allocation query for the active sinkpad,
679 * after switching a reconfigure event is sent and upstream
680 * should reconfigure and do a new allocation query
682 if (GST_PAD_DIRECTION (pad) == GST_PAD_SINK) {
683 GST_INPUT_SELECTOR_LOCK (sel);
684 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
685 GST_INPUT_SELECTOR_UNLOCK (sel);
687 if (pad != active_sinkpad) {
695 res = gst_pad_query_default (pad, parent, query);
704 gst_input_selector_get_clipped_running_time (GstSegment * seg, GstBuffer * buf)
706 GstClockTime running_time;
708 running_time = GST_BUFFER_PTS (buf);
709 /* If possible try to get the running time at the end of the buffer */
710 if (GST_BUFFER_DURATION_IS_VALID (buf))
711 running_time += GST_BUFFER_DURATION (buf);
712 /* Only use the segment to convert to running time if the segment is
713 * in TIME format, otherwise do our best to try to sync */
714 if (GST_CLOCK_TIME_IS_VALID (seg->stop)) {
715 if (running_time > seg->stop) {
716 running_time = seg->stop;
719 return gst_segment_to_running_time (seg, GST_FORMAT_TIME, running_time);
722 /* must be called without the SELECTOR_LOCK, will wait until the running time
723 * of the active pad is after this pad or return TRUE when flushing */
725 gst_input_selector_wait_running_time (GstInputSelector * sel,
726 GstSelectorPad * selpad, GstBuffer * buf)
730 GST_DEBUG_OBJECT (selpad, "entering wait for buffer %p", buf);
732 /* If we have no valid timestamp we can't sync this buffer */
733 if (!GST_BUFFER_PTS_IS_VALID (buf)) {
734 GST_DEBUG_OBJECT (selpad, "leaving wait for buffer with "
735 "invalid timestamp");
739 seg = &selpad->segment;
742 * a) this is the active pad
743 * b) the pad or the selector is flushing
744 * c) the buffer running time is before the current running time
745 * (either active-seg or clock, depending on sync-mode)
748 GST_INPUT_SELECTOR_LOCK (sel);
750 GstPad *active_sinkpad;
751 GstSelectorPad *active_selpad;
753 gint64 cur_running_time;
754 GstClockTime running_time;
756 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
757 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
759 if (seg->format != GST_FORMAT_TIME) {
760 GST_DEBUG_OBJECT (selpad,
761 "Not waiting because we don't have a TIME segment");
762 GST_INPUT_SELECTOR_UNLOCK (sel);
766 running_time = gst_input_selector_get_clipped_running_time (seg, buf);
767 /* If this is outside the segment don't sync */
768 if (running_time == -1) {
769 GST_DEBUG_OBJECT (selpad,
770 "Not waiting because buffer is outside segment");
771 GST_INPUT_SELECTOR_UNLOCK (sel);
775 cur_running_time = GST_CLOCK_TIME_NONE;
776 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
777 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
779 GstClockTime base_time;
781 cur_running_time = gst_clock_get_time (clock);
782 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
783 if (base_time <= cur_running_time)
784 cur_running_time -= base_time;
786 cur_running_time = 0;
788 gst_object_unref (clock);
791 GstSegment *active_seg;
793 active_seg = &active_selpad->segment;
795 /* If the active segment is configured but not to time format
796 * we can't do any syncing at all */
797 if ((active_seg->format != GST_FORMAT_TIME
798 && active_seg->format != GST_FORMAT_UNDEFINED)) {
799 GST_DEBUG_OBJECT (selpad,
800 "Not waiting because active segment isn't in TIME format");
801 GST_INPUT_SELECTOR_UNLOCK (sel);
805 /* Get active pad's running time, if no configured segment yet keep at -1 */
806 if (active_seg->format == GST_FORMAT_TIME)
807 cur_running_time = gst_segment_to_running_time (active_seg,
808 GST_FORMAT_TIME, active_seg->position);
811 /* Don't wait if the group is finished on the active pad,
812 * as the running time won't progress now */
813 if (selpad != active_selpad && active_selpad->group_done &&
814 selpad->group_id == active_selpad->group_id) {
815 GST_DEBUG_OBJECT (selpad, "Active pad received group-done. Unblocking");
816 GST_INPUT_SELECTOR_UNLOCK (sel);
820 if (selpad != active_selpad && !sel->eos && !sel->flushing
821 && !selpad->flushing && (cur_running_time == GST_CLOCK_TIME_NONE
822 || running_time >= cur_running_time)) {
823 GST_DEBUG_OBJECT (selpad,
824 "Waiting for active streams to advance. %" GST_TIME_FORMAT " >= %"
825 GST_TIME_FORMAT, GST_TIME_ARGS (running_time),
826 GST_TIME_ARGS (cur_running_time));
827 GST_INPUT_SELECTOR_WAIT (sel);
829 GST_INPUT_SELECTOR_UNLOCK (sel);
834 /* Return TRUE if the selector or the pad is flushing */
835 return (sel->flushing || selpad->flushing);
838 #if DEBUG_CACHED_BUFFERS
840 gst_input_selector_debug_cached_buffers (GstInputSelector * sel)
844 if (gst_debug_category_get_threshold (input_selector_debug) < GST_LEVEL_DEBUG)
847 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = walk->next) {
848 GstSelectorPad *selpad;
852 selpad = GST_SELECTOR_PAD_CAST (walk->data);
853 if (!selpad->cached_buffers) {
854 GST_DEBUG_OBJECT (selpad, "Cached buffers timestamps: <none>");
858 timestamps = g_string_new ("Cached buffers timestamps:");
859 for (l = selpad->cached_buffers->head; l != NULL; l = l->next) {
860 GstSelectorPadCachedBuffer *cached_buffer = l->data;
862 g_string_append_printf (timestamps, " %" GST_TIME_FORMAT,
863 GST_TIME_ARGS (GST_BUFFER_PTS (cached_buffer->buffer)));
865 GST_DEBUG_OBJECT (selpad, "%s", timestamps->str);
866 g_string_free (timestamps, TRUE);
871 /* must be called with the SELECTOR_LOCK */
873 gst_input_selector_cleanup_old_cached_buffers (GstInputSelector * sel,
877 gint64 cur_running_time;
880 cur_running_time = GST_CLOCK_TIME_NONE;
881 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
882 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
884 GstClockTime base_time;
886 cur_running_time = gst_clock_get_time (clock);
887 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
888 if (base_time <= cur_running_time)
889 cur_running_time -= base_time;
891 cur_running_time = 0;
893 gst_object_unref (clock);
896 GstPad *active_sinkpad;
897 GstSelectorPad *active_selpad;
898 GstSegment *active_seg;
900 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
901 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
902 active_seg = &active_selpad->segment;
904 /* Get active pad's running time, if no configured segment yet keep at -1 */
905 if (active_seg->format == GST_FORMAT_TIME)
906 cur_running_time = gst_segment_to_running_time (active_seg,
907 GST_FORMAT_TIME, active_seg->position);
910 if (!GST_CLOCK_TIME_IS_VALID (cur_running_time))
913 GST_DEBUG_OBJECT (sel, "Cleaning up old cached buffers");
914 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
915 GstSelectorPad *selpad;
917 GstSelectorPadCachedBuffer *cached_buffer;
918 GSList *maybe_remove;
919 guint queue_position;
921 selpad = GST_SELECTOR_PAD_CAST (walk->data);
922 if (!selpad->cached_buffers)
925 seg = &selpad->segment;
929 while ((cached_buffer = g_queue_peek_nth (selpad->cached_buffers,
931 GstBuffer *buffer = cached_buffer->buffer;
932 GstClockTime running_time;
935 /* If we have no valid timestamp we can't sync this buffer */
936 if (!GST_BUFFER_PTS_IS_VALID (buffer)) {
937 maybe_remove = g_slist_append (maybe_remove, cached_buffer);
938 queue_position = g_slist_length (maybe_remove);
942 /* the buffer is still valid if its duration is valid and the
943 * timestamp + duration is >= time, or if its duration is invalid
944 * and the timestamp is >= time */
945 running_time = gst_input_selector_get_clipped_running_time (seg, buffer);
946 GST_DEBUG_OBJECT (selpad,
947 "checking if buffer %p running time=%" GST_TIME_FORMAT
948 " >= stream time=%" GST_TIME_FORMAT, buffer,
949 GST_TIME_ARGS (running_time), GST_TIME_ARGS (cur_running_time));
950 if (running_time >= cur_running_time) {
954 GST_DEBUG_OBJECT (selpad, "Removing old cached buffer %p", buffer);
955 g_queue_pop_nth (selpad->cached_buffers, queue_position);
956 gst_selector_pad_free_cached_buffer (cached_buffer);
958 for (l = maybe_remove; l != NULL; l = g_slist_next (l)) {
959 /* A buffer after some invalid buffers was removed, it means the invalid buffers
960 * are old, lets also remove them */
961 cached_buffer = l->data;
962 g_queue_remove (selpad->cached_buffers, cached_buffer);
963 gst_selector_pad_free_cached_buffer (cached_buffer);
966 g_slist_free (maybe_remove);
971 g_slist_free (maybe_remove);
974 if (g_queue_is_empty (selpad->cached_buffers)) {
975 g_queue_free (selpad->cached_buffers);
976 selpad->cached_buffers = NULL;
980 #if DEBUG_CACHED_BUFFERS
981 gst_input_selector_debug_cached_buffers (sel);
986 gst_selector_pad_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
988 GstInputSelector *sel;
990 GstPad *active_sinkpad;
991 GstPad *prev_active_sinkpad = NULL;
992 GstSelectorPad *selpad;
994 sel = GST_INPUT_SELECTOR (parent);
995 selpad = GST_SELECTOR_PAD_CAST (pad);
997 GST_DEBUG_OBJECT (selpad,
998 "entering chain for buf %p with timestamp %" GST_TIME_FORMAT, buf,
999 GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
1001 GST_INPUT_SELECTOR_LOCK (sel);
1003 if (sel->flushing) {
1004 GST_INPUT_SELECTOR_UNLOCK (sel);
1008 GST_LOG_OBJECT (pad, "getting active pad");
1010 prev_active_sinkpad =
1011 sel->active_sinkpad ? gst_object_ref (sel->active_sinkpad) : NULL;
1012 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1014 /* In sync mode wait until the active pad has advanced
1015 * after the running time of the current buffer */
1016 if (sel->sync_streams) {
1017 /* call chain for each cached buffer if we are not the active pad
1018 * or if we are the active pad but didn't push anything yet. */
1019 if (active_sinkpad != pad || !selpad->pushed) {
1020 /* no need to check for sel->cache_buffers as selpad->cached_buffers
1021 * will only be valid if cache_buffers is TRUE */
1022 if (selpad->cached_buffers && !selpad->sending_cached_buffers) {
1023 GstSelectorPadCachedBuffer *cached_buffer;
1024 GstSegment saved_segment;
1026 saved_segment = selpad->segment;
1028 selpad->sending_cached_buffers = TRUE;
1029 while (!sel->eos && !sel->flushing && !selpad->flushing &&
1030 (cached_buffer = g_queue_pop_head (selpad->cached_buffers))) {
1031 GST_DEBUG_OBJECT (pad, "Cached buffers found, "
1032 "invoking chain for cached buffer %p", cached_buffer->buffer);
1034 selpad->segment = cached_buffer->segment;
1035 selpad->events_pending = TRUE;
1036 GST_INPUT_SELECTOR_UNLOCK (sel);
1037 gst_selector_pad_chain (pad, parent, cached_buffer->buffer);
1038 GST_INPUT_SELECTOR_LOCK (sel);
1040 /* We just passed the ownership of the buffer to the chain function */
1041 cached_buffer->buffer = NULL;
1042 gst_selector_pad_free_cached_buffer (cached_buffer);
1044 /* we may have cleaned up the queue in the meantime because of
1046 if (!selpad->cached_buffers) {
1050 selpad->sending_cached_buffers = FALSE;
1052 /* all cached buffers sent, restore segment for current buffer */
1053 selpad->segment = saved_segment;
1054 selpad->events_pending = TRUE;
1056 /* Might have changed while calling chain for cached buffers */
1057 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1061 if (active_sinkpad != pad) {
1062 GST_INPUT_SELECTOR_UNLOCK (sel);
1063 if (gst_input_selector_wait_running_time (sel, selpad, buf))
1065 GST_INPUT_SELECTOR_LOCK (sel);
1068 /* Might have changed while waiting */
1069 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1072 /* update the segment on the srcpad */
1073 if (GST_BUFFER_PTS_IS_VALID (buf)) {
1074 GstClockTime start_time = GST_BUFFER_PTS (buf);
1076 GST_LOG_OBJECT (pad, "received start time %" GST_TIME_FORMAT,
1077 GST_TIME_ARGS (start_time));
1078 if (GST_BUFFER_DURATION_IS_VALID (buf))
1079 GST_LOG_OBJECT (pad, "received end time %" GST_TIME_FORMAT,
1080 GST_TIME_ARGS (start_time + GST_BUFFER_DURATION (buf)));
1082 GST_OBJECT_LOCK (pad);
1083 selpad->segment.position = start_time;
1084 GST_OBJECT_UNLOCK (pad);
1087 /* Ignore buffers from pads except the selected one */
1088 if (pad != active_sinkpad)
1091 /* Tell all non-active pads that we advanced the running time */
1092 if (sel->sync_streams)
1093 GST_INPUT_SELECTOR_BROADCAST (sel);
1095 GST_INPUT_SELECTOR_UNLOCK (sel);
1097 if (prev_active_sinkpad != active_sinkpad) {
1098 if (prev_active_sinkpad)
1099 g_object_notify (G_OBJECT (prev_active_sinkpad), "active");
1100 g_object_notify (G_OBJECT (active_sinkpad), "active");
1101 g_object_notify (G_OBJECT (sel), "active-pad");
1104 /* if we have a pending events, push them now */
1105 if (G_UNLIKELY (prev_active_sinkpad != active_sinkpad
1106 || selpad->events_pending)) {
1107 gst_pad_sticky_events_foreach (GST_PAD_CAST (selpad), forward_sticky_events,
1109 selpad->events_pending = FALSE;
1112 if (prev_active_sinkpad) {
1113 gst_object_unref (prev_active_sinkpad);
1114 prev_active_sinkpad = NULL;
1117 if (selpad->discont) {
1118 buf = gst_buffer_make_writable (buf);
1120 GST_DEBUG_OBJECT (pad, "Marking discont buffer %p", buf);
1121 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
1122 selpad->discont = FALSE;
1126 GST_LOG_OBJECT (pad, "Forwarding buffer %p with timestamp %" GST_TIME_FORMAT,
1127 buf, GST_TIME_ARGS (GST_BUFFER_PTS (buf)));
1129 /* Only make the buffer read-only when necessary */
1130 if (sel->sync_streams && sel->cache_buffers)
1131 buf = gst_buffer_ref (buf);
1132 res = gst_pad_push (sel->srcpad, buf);
1133 GST_LOG_OBJECT (pad, "Buffer %p forwarded result=%d", buf, res);
1135 GST_INPUT_SELECTOR_LOCK (sel);
1137 if (sel->sync_streams && sel->cache_buffers) {
1138 /* Might have changed while pushing */
1139 active_sinkpad = gst_input_selector_get_active_sinkpad (sel);
1140 /* only set pad to pushed if we are still the active pad */
1141 if (active_sinkpad == pad)
1142 selpad->pushed = TRUE;
1144 /* cache buffer as we may need it again if we change pads */
1145 gst_selector_pad_cache_buffer (selpad, buf);
1146 gst_input_selector_cleanup_old_cached_buffers (sel, pad);
1148 selpad->pushed = TRUE;
1150 GST_INPUT_SELECTOR_UNLOCK (sel);
1154 if (prev_active_sinkpad)
1155 gst_object_unref (prev_active_sinkpad);
1156 prev_active_sinkpad = NULL;
1160 /* dropped buffers */
1163 gboolean active_pad_pushed = GST_SELECTOR_PAD_CAST (active_sinkpad)->pushed;
1165 GST_DEBUG_OBJECT (pad, "Pad not active, discard buffer %p", buf);
1166 /* when we drop a buffer, we're creating a discont on this pad */
1167 selpad->discont = TRUE;
1168 GST_INPUT_SELECTOR_UNLOCK (sel);
1169 gst_buffer_unref (buf);
1171 /* figure out what to return upstream */
1172 GST_OBJECT_LOCK (selpad);
1173 if (selpad->always_ok || !active_pad_pushed)
1176 res = GST_FLOW_NOT_LINKED;
1177 GST_OBJECT_UNLOCK (selpad);
1183 GST_DEBUG_OBJECT (pad, "We are flushing, discard buffer %p", buf);
1184 gst_buffer_unref (buf);
1185 res = GST_FLOW_FLUSHING;
1190 static void gst_input_selector_dispose (GObject * object);
1191 static void gst_input_selector_finalize (GObject * object);
1193 static void gst_input_selector_set_property (GObject * object,
1194 guint prop_id, const GValue * value, GParamSpec * pspec);
1195 static void gst_input_selector_get_property (GObject * object,
1196 guint prop_id, GValue * value, GParamSpec * pspec);
1198 static GstPad *gst_input_selector_request_new_pad (GstElement * element,
1199 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps);
1200 static void gst_input_selector_release_pad (GstElement * element, GstPad * pad);
1202 static GstStateChangeReturn gst_input_selector_change_state (GstElement *
1203 element, GstStateChange transition);
1205 static gboolean gst_input_selector_event (GstPad * pad, GstObject * parent,
1207 static gboolean gst_input_selector_query (GstPad * pad, GstObject * parent,
1211 GST_DEBUG_CATEGORY_INIT (input_selector_debug, \
1212 "input-selector", 0, "An input stream selector element");
1213 #define gst_input_selector_parent_class parent_class
1214 G_DEFINE_TYPE_WITH_CODE (GstInputSelector, gst_input_selector, GST_TYPE_ELEMENT,
1218 gst_input_selector_class_init (GstInputSelectorClass * klass)
1220 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
1221 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
1223 gobject_class->dispose = gst_input_selector_dispose;
1224 gobject_class->finalize = gst_input_selector_finalize;
1226 gobject_class->set_property = gst_input_selector_set_property;
1227 gobject_class->get_property = gst_input_selector_get_property;
1229 g_object_class_install_property (gobject_class, PROP_N_PADS,
1230 g_param_spec_uint ("n-pads", "Number of Pads",
1231 "The number of sink pads", 0, G_MAXUINT, 0,
1232 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
1234 g_object_class_install_property (gobject_class, PROP_ACTIVE_PAD,
1235 g_param_spec_object ("active-pad", "Active pad",
1236 "The currently active sink pad", GST_TYPE_PAD,
1237 G_PARAM_READWRITE | GST_PARAM_MUTABLE_PLAYING |
1238 G_PARAM_STATIC_STRINGS));
1241 * GstInputSelector:sync-streams
1243 * If set to %TRUE all inactive streams will be synced to the
1244 * running time of the active stream or to the current clock.
1246 * To make sure no buffers are dropped by input-selector
1247 * that might be needed when switching the active pad,
1248 * sync-mode should be set to "clock" and cache-buffers to TRUE.
1250 g_object_class_install_property (gobject_class, PROP_SYNC_STREAMS,
1251 g_param_spec_boolean ("sync-streams", "Sync Streams",
1252 "Synchronize inactive streams to the running time of the active "
1253 "stream or to the current clock",
1254 DEFAULT_SYNC_STREAMS,
1255 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1256 GST_PARAM_MUTABLE_READY));
1259 * GstInputSelector:sync-mode
1261 * Select how input-selector will sync buffers when in sync-streams mode.
1263 * Note that when using the "active-segment" mode, the "active-segment" may
1264 * be ahead of current clock time when switching the active pad, as the current
1265 * active pad may have pushed more buffers than what was displayed/consumed,
1266 * which may cause delays and some missing buffers.
1268 g_object_class_install_property (gobject_class, PROP_SYNC_MODE,
1269 g_param_spec_enum ("sync-mode", "Sync mode",
1270 "Behavior in sync-streams mode", GST_TYPE_INPUT_SELECTOR_SYNC_MODE,
1272 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1273 GST_PARAM_MUTABLE_READY));
1276 * GstInputSelector:cache-buffers
1278 * If set to %TRUE and GstInputSelector:sync-streams is also set to %TRUE,
1279 * the active pad will cache the buffers still considered valid (after current
1280 * running time, see sync-mode) to avoid missing frames if/when the pad is
1283 * The active pad may push more buffers than what is currently displayed/consumed
1284 * and when changing pads those buffers will be discarded and the only way to
1285 * reactivate that pad without losing the already consumed buffers is to enable cache.
1287 g_object_class_install_property (gobject_class, PROP_CACHE_BUFFERS,
1288 g_param_spec_boolean ("cache-buffers", "Cache Buffers",
1289 "Cache buffers for active-pad",
1290 DEFAULT_CACHE_BUFFERS,
1291 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1292 GST_PARAM_MUTABLE_READY));
1294 gst_element_class_set_static_metadata (gstelement_class, "Input selector",
1295 "Generic", "N-to-1 input stream selector",
1296 "Julien Moutte <julien@moutte.net>, "
1297 "Jan Schmidt <thaytan@mad.scientist.com>, "
1298 "Wim Taymans <wim.taymans@gmail.com>");
1299 gst_element_class_add_static_pad_template_with_gtype (gstelement_class,
1300 &gst_input_selector_sink_factory, GST_TYPE_SELECTOR_PAD);
1301 gst_element_class_add_static_pad_template (gstelement_class,
1302 &gst_input_selector_src_factory);
1304 gstelement_class->request_new_pad = gst_input_selector_request_new_pad;
1305 gstelement_class->release_pad = gst_input_selector_release_pad;
1306 gstelement_class->change_state = gst_input_selector_change_state;
1310 gst_input_selector_init (GstInputSelector * sel)
1312 sel->srcpad = gst_pad_new ("src", GST_PAD_SRC);
1313 gst_pad_set_iterate_internal_links_function (sel->srcpad,
1314 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1315 gst_pad_set_event_function (sel->srcpad,
1316 GST_DEBUG_FUNCPTR (gst_input_selector_event));
1317 gst_pad_set_query_function (sel->srcpad,
1318 GST_DEBUG_FUNCPTR (gst_input_selector_query));
1319 GST_OBJECT_FLAG_SET (sel->srcpad, GST_PAD_FLAG_PROXY_CAPS);
1320 gst_element_add_pad (GST_ELEMENT (sel), sel->srcpad);
1321 /* sinkpad management */
1322 sel->active_sinkpad = NULL;
1324 sel->sync_streams = DEFAULT_SYNC_STREAMS;
1325 sel->sync_mode = DEFAULT_SYNC_MODE;
1326 sel->have_group_id = TRUE;
1328 g_mutex_init (&sel->lock);
1329 g_cond_init (&sel->cond);
1332 /* lets give a change for downstream to do something on
1333 * active-pad change before we start pushing new buffers */
1334 g_signal_connect_data (sel, "notify::active-pad",
1335 (GCallback) gst_input_selector_active_pad_changed, NULL,
1336 NULL, G_CONNECT_AFTER);
1340 gst_input_selector_dispose (GObject * object)
1342 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1344 if (sel->active_sinkpad) {
1345 gst_object_unref (sel->active_sinkpad);
1346 sel->active_sinkpad = NULL;
1348 G_OBJECT_CLASS (parent_class)->dispose (object);
1352 gst_input_selector_finalize (GObject * object)
1354 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1356 g_mutex_clear (&sel->lock);
1357 g_cond_clear (&sel->cond);
1359 G_OBJECT_CLASS (parent_class)->finalize (object);
1362 /* this function must be called with the SELECTOR_LOCK. It returns TRUE when the
1363 * active pad changed. */
1365 gst_input_selector_set_active_pad (GstInputSelector * self, GstPad * pad)
1367 GstSelectorPad *old, *new;
1368 GstPad **active_pad_p;
1370 if (pad == self->active_sinkpad)
1373 /* guard against users setting a src pad or foreign pad as active pad */
1375 g_return_val_if_fail (GST_PAD_IS_SINK (pad), FALSE);
1376 g_return_val_if_fail (GST_IS_SELECTOR_PAD (pad), FALSE);
1377 g_return_val_if_fail (GST_PAD_PARENT (pad) == GST_ELEMENT_CAST (self),
1381 old = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
1382 new = GST_SELECTOR_PAD_CAST (pad);
1384 GST_DEBUG_OBJECT (self, "setting active pad to %s:%s",
1385 GST_DEBUG_PAD_NAME (new));
1388 old->pushed = FALSE;
1390 new->pushed = FALSE;
1392 /* Send a new SEGMENT event on the new pad next */
1393 if (old != new && new)
1394 new->events_pending = TRUE;
1396 active_pad_p = &self->active_sinkpad;
1397 gst_object_replace ((GstObject **) active_pad_p, GST_OBJECT_CAST (pad));
1399 if (old && old != new)
1400 gst_pad_push_event (GST_PAD_CAST (old), gst_event_new_reconfigure ());
1402 gst_pad_push_event (GST_PAD_CAST (new), gst_event_new_reconfigure ());
1404 GST_DEBUG_OBJECT (self, "New active pad is %" GST_PTR_FORMAT,
1405 self->active_sinkpad);
1407 if (old != new && new && new->eos) {
1408 new->eos_sent = FALSE;
1409 GST_INPUT_SELECTOR_BROADCAST (self);
1416 gst_input_selector_set_property (GObject * object, guint prop_id,
1417 const GValue * value, GParamSpec * pspec)
1419 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1422 case PROP_ACTIVE_PAD:
1426 pad = g_value_get_object (value);
1428 GST_INPUT_SELECTOR_LOCK (sel);
1430 #if DEBUG_CACHED_BUFFERS
1431 gst_input_selector_debug_cached_buffers (sel);
1434 gst_input_selector_set_active_pad (sel, pad);
1436 #if DEBUG_CACHED_BUFFERS
1437 gst_input_selector_debug_cached_buffers (sel);
1440 GST_INPUT_SELECTOR_UNLOCK (sel);
1443 case PROP_SYNC_STREAMS:
1444 GST_INPUT_SELECTOR_LOCK (sel);
1445 sel->sync_streams = g_value_get_boolean (value);
1446 GST_INPUT_SELECTOR_UNLOCK (sel);
1448 case PROP_SYNC_MODE:
1449 GST_INPUT_SELECTOR_LOCK (sel);
1450 sel->sync_mode = g_value_get_enum (value);
1451 GST_INPUT_SELECTOR_UNLOCK (sel);
1453 case PROP_CACHE_BUFFERS:
1454 GST_INPUT_SELECTOR_LOCK (object);
1455 sel->cache_buffers = g_value_get_boolean (value);
1456 GST_INPUT_SELECTOR_UNLOCK (object);
1459 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1465 gst_input_selector_active_pad_changed (GstInputSelector * sel,
1466 GParamSpec * pspec, gpointer user_data)
1468 /* Wake up all non-active pads in sync mode, they might be
1469 * the active pad now */
1470 if (sel->sync_streams)
1471 GST_INPUT_SELECTOR_BROADCAST (sel);
1475 gst_input_selector_get_property (GObject * object, guint prop_id,
1476 GValue * value, GParamSpec * pspec)
1478 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1482 GST_INPUT_SELECTOR_LOCK (object);
1483 g_value_set_uint (value, sel->n_pads);
1484 GST_INPUT_SELECTOR_UNLOCK (object);
1486 case PROP_ACTIVE_PAD:
1487 GST_INPUT_SELECTOR_LOCK (object);
1488 g_value_set_object (value, sel->active_sinkpad);
1489 GST_INPUT_SELECTOR_UNLOCK (object);
1491 case PROP_SYNC_STREAMS:
1492 GST_INPUT_SELECTOR_LOCK (object);
1493 g_value_set_boolean (value, sel->sync_streams);
1494 GST_INPUT_SELECTOR_UNLOCK (object);
1496 case PROP_SYNC_MODE:
1497 GST_INPUT_SELECTOR_LOCK (object);
1498 g_value_set_enum (value, sel->sync_mode);
1499 GST_INPUT_SELECTOR_UNLOCK (object);
1501 case PROP_CACHE_BUFFERS:
1502 GST_INPUT_SELECTOR_LOCK (object);
1503 g_value_set_boolean (value, sel->cache_buffers);
1504 GST_INPUT_SELECTOR_UNLOCK (object);
1507 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1513 gst_input_selector_get_linked_pad (GstInputSelector * sel, GstPad * pad,
1516 GstPad *otherpad = NULL;
1518 GST_INPUT_SELECTOR_LOCK (sel);
1519 if (pad == sel->srcpad)
1520 otherpad = sel->active_sinkpad;
1521 else if (pad == sel->active_sinkpad || !strict)
1522 otherpad = sel->srcpad;
1524 gst_object_ref (otherpad);
1525 GST_INPUT_SELECTOR_UNLOCK (sel);
1531 gst_input_selector_event (GstPad * pad, GstObject * parent, GstEvent * event)
1533 GstInputSelector *sel;
1534 gboolean result = FALSE;
1536 gboolean done = FALSE;
1537 GValue item = { 0, };
1539 GList *pushed_pads = NULL;
1541 sel = GST_INPUT_SELECTOR (parent);
1542 /* Send upstream events to all sinkpads */
1543 iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1545 /* This is now essentially a copy of gst_pad_event_default_dispatch
1546 * with a different iterator */
1548 switch (gst_iterator_next (iter, &item)) {
1549 case GST_ITERATOR_OK:
1550 eventpad = g_value_get_object (&item);
1552 /* if already pushed, skip */
1553 if (g_list_find (pushed_pads, eventpad)) {
1554 g_value_reset (&item);
1558 gst_event_ref (event);
1559 result |= gst_pad_push_event (eventpad, event);
1561 g_value_reset (&item);
1563 case GST_ITERATOR_RESYNC:
1564 /* We don't reset the result here because we don't push the event
1565 * again on pads that got the event already and because we need
1566 * to consider the result of the previous pushes */
1567 gst_iterator_resync (iter);
1569 case GST_ITERATOR_ERROR:
1570 GST_ERROR_OBJECT (pad, "Could not iterate over sinkpads");
1573 case GST_ITERATOR_DONE:
1578 g_value_unset (&item);
1579 gst_iterator_free (iter);
1581 g_list_free (pushed_pads);
1583 gst_event_unref (event);
1591 GstClockTime min, max;
1595 query_latency_default_fold (const GValue * item, GValue * ret,
1598 GstPad *pad = g_value_get_object (item), *peer;
1599 LatencyFoldData *fold_data = user_data;
1601 gboolean res = FALSE;
1603 query = gst_query_new_latency ();
1605 peer = gst_pad_get_peer (pad);
1607 res = gst_pad_peer_query (pad, query);
1609 GST_LOG_OBJECT (pad, "No peer pad found, ignoring this pad");
1614 GstClockTime min, max;
1616 gst_query_parse_latency (query, &live, &min, &max);
1618 GST_LOG_OBJECT (pad, "got latency live:%s min:%" G_GINT64_FORMAT
1619 " max:%" G_GINT64_FORMAT, live ? "true" : "false", min, max);
1622 if (min > fold_data->min)
1623 fold_data->min = min;
1625 if (fold_data->max == GST_CLOCK_TIME_NONE)
1626 fold_data->max = max;
1627 else if (max < fold_data->max)
1628 fold_data->max = max;
1629 fold_data->live = live;
1632 GST_DEBUG_OBJECT (pad, "latency query failed");
1633 g_value_set_boolean (ret, FALSE);
1636 gst_query_unref (query);
1638 gst_object_unref (peer);
1644 gst_input_selector_query_latency (GstInputSelector * sel, GstPad * pad,
1648 GstIteratorResult res;
1649 GValue ret = G_VALUE_INIT;
1651 LatencyFoldData fold_data;
1653 /* This is basically gst_pad_query_latency_default() but with a different
1654 * iterator. We query all sinkpads! */
1655 it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1657 GST_DEBUG_OBJECT (pad, "Can't iterate internal links");
1661 g_value_init (&ret, G_TYPE_BOOLEAN);
1664 fold_data.live = FALSE;
1666 fold_data.max = GST_CLOCK_TIME_NONE;
1668 g_value_set_boolean (&ret, TRUE);
1669 res = gst_iterator_fold (it, query_latency_default_fold, &ret, &fold_data);
1671 case GST_ITERATOR_OK:
1672 g_assert_not_reached ();
1674 case GST_ITERATOR_DONE:
1676 case GST_ITERATOR_ERROR:
1677 g_value_set_boolean (&ret, FALSE);
1679 case GST_ITERATOR_RESYNC:
1680 gst_iterator_resync (it);
1683 g_assert_not_reached ();
1686 gst_iterator_free (it);
1688 query_ret = g_value_get_boolean (&ret);
1690 GST_LOG_OBJECT (pad, "got latency live:%s min:%" G_GINT64_FORMAT
1691 " max:%" G_GINT64_FORMAT, fold_data.live ? "true" : "false",
1692 fold_data.min, fold_data.max);
1694 if (fold_data.min > fold_data.max) {
1695 GST_ERROR_OBJECT (pad, "minimum latency bigger than maximum latency");
1698 gst_query_set_latency (query, fold_data.live, fold_data.min, fold_data.max);
1700 GST_LOG_OBJECT (pad, "latency query failed");
1707 gst_input_selector_query (GstPad * pad, GstObject * parent, GstQuery * query)
1709 GstInputSelector *sel = GST_INPUT_SELECTOR (parent);
1711 switch (GST_QUERY_TYPE (query)) {
1712 case GST_QUERY_LATENCY:
1713 /* Query all sink pads for the latency, not just the active one */
1714 return gst_input_selector_query_latency (sel, pad, query);
1716 return gst_pad_query_default (pad, parent, query);
1720 /* check if the pad is the active sinkpad */
1721 static inline gboolean
1722 gst_input_selector_is_active_sinkpad (GstInputSelector * sel, GstPad * pad)
1726 GST_INPUT_SELECTOR_LOCK (sel);
1727 res = (pad == sel->active_sinkpad);
1728 GST_INPUT_SELECTOR_UNLOCK (sel);
1733 /* Get or create the active sinkpad, must be called with SELECTOR_LOCK */
1735 gst_input_selector_get_active_sinkpad (GstInputSelector * sel)
1737 GstPad *active_sinkpad;
1739 active_sinkpad = sel->active_sinkpad;
1740 if (active_sinkpad == NULL) {
1741 GValue item = G_VALUE_INIT;
1742 GstIterator *iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1743 GstIteratorResult ires;
1745 while ((ires = gst_iterator_next (iter, &item)) == GST_ITERATOR_RESYNC)
1746 gst_iterator_resync (iter);
1747 if (ires == GST_ITERATOR_OK) {
1748 /* If no pad is currently selected, we return the first usable pad to
1749 * guarantee consistency */
1751 active_sinkpad = sel->active_sinkpad = g_value_dup_object (&item);
1752 g_value_reset (&item);
1753 GST_DEBUG_OBJECT (sel, "Activating pad %s:%s",
1754 GST_DEBUG_PAD_NAME (active_sinkpad));
1756 GST_WARNING_OBJECT (sel, "Couldn't find a default sink pad");
1757 gst_iterator_free (iter);
1760 return active_sinkpad;
1764 gst_input_selector_request_new_pad (GstElement * element,
1765 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps)
1767 GstInputSelector *sel;
1769 GstPad *sinkpad = NULL;
1771 g_return_val_if_fail (templ->direction == GST_PAD_SINK, NULL);
1773 sel = GST_INPUT_SELECTOR (element);
1775 GST_INPUT_SELECTOR_LOCK (sel);
1777 GST_LOG_OBJECT (sel, "Creating new pad sink_%u", sel->padcount);
1778 name = g_strdup_printf ("sink_%u", sel->padcount++);
1779 sinkpad = g_object_new (GST_TYPE_SELECTOR_PAD,
1780 "name", name, "direction", templ->direction, "template", templ, NULL);
1785 gst_pad_set_event_function (sinkpad,
1786 GST_DEBUG_FUNCPTR (gst_selector_pad_event));
1787 gst_pad_set_query_function (sinkpad,
1788 GST_DEBUG_FUNCPTR (gst_selector_pad_query));
1789 gst_pad_set_chain_function (sinkpad,
1790 GST_DEBUG_FUNCPTR (gst_selector_pad_chain));
1791 gst_pad_set_iterate_internal_links_function (sinkpad,
1792 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1794 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_CAPS);
1795 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_ALLOCATION);
1796 gst_pad_set_active (sinkpad, TRUE);
1797 gst_element_add_pad (GST_ELEMENT (sel), sinkpad);
1798 GST_INPUT_SELECTOR_UNLOCK (sel);
1804 gst_input_selector_release_pad (GstElement * element, GstPad * pad)
1806 GstInputSelector *sel;
1808 sel = GST_INPUT_SELECTOR (element);
1809 GST_LOG_OBJECT (sel, "Releasing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1811 GST_INPUT_SELECTOR_LOCK (sel);
1812 /* if the pad was the active pad, makes us select a new one */
1813 if (sel->active_sinkpad == pad) {
1814 GST_DEBUG_OBJECT (sel, "Deactivating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1815 gst_object_unref (sel->active_sinkpad);
1816 sel->active_sinkpad = NULL;
1819 GST_INPUT_SELECTOR_UNLOCK (sel);
1821 gst_pad_set_active (pad, FALSE);
1822 gst_element_remove_pad (GST_ELEMENT (sel), pad);
1826 gst_input_selector_reset (GstInputSelector * sel)
1830 GST_INPUT_SELECTOR_LOCK (sel);
1831 /* clear active pad */
1832 if (sel->active_sinkpad) {
1833 gst_object_unref (sel->active_sinkpad);
1834 sel->active_sinkpad = NULL;
1836 sel->eos_sent = FALSE;
1838 /* reset each of our sinkpads state */
1839 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
1840 GstSelectorPad *selpad = GST_SELECTOR_PAD_CAST (walk->data);
1842 gst_selector_pad_reset (selpad);
1845 gst_tag_list_unref (selpad->tags);
1846 selpad->tags = NULL;
1849 sel->have_group_id = TRUE;
1850 GST_INPUT_SELECTOR_UNLOCK (sel);
1853 static GstStateChangeReturn
1854 gst_input_selector_change_state (GstElement * element,
1855 GstStateChange transition)
1857 GstInputSelector *self = GST_INPUT_SELECTOR (element);
1858 GstStateChangeReturn result;
1860 switch (transition) {
1861 case GST_STATE_CHANGE_READY_TO_PAUSED:
1862 GST_INPUT_SELECTOR_LOCK (self);
1864 self->flushing = FALSE;
1865 GST_INPUT_SELECTOR_UNLOCK (self);
1867 case GST_STATE_CHANGE_PAUSED_TO_READY:
1868 /* first unlock before we call the parent state change function, which
1869 * tries to acquire the stream lock when going to ready. */
1870 GST_INPUT_SELECTOR_LOCK (self);
1872 self->flushing = TRUE;
1873 GST_INPUT_SELECTOR_BROADCAST (self);
1874 GST_INPUT_SELECTOR_UNLOCK (self);
1880 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1882 switch (transition) {
1883 case GST_STATE_CHANGE_PAUSED_TO_READY:
1884 gst_input_selector_reset (self);