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., 59 Temple Place - Suite 330,
23 * Boston, MA 02111-1307, USA.
27 * SECTION:element-input-selector
28 * @see_also: #GstOutputSelector
30 * Direct one out of N input streams to the output pad.
32 * The input pads are from a GstPad subclass and have additional
33 * properties, which users may find useful, namely:
37 * "running-time": Running time of stream on pad (#gint64)
40 * "tags": The currently active tags on the pad (#GstTagList, boxed type)
43 * "active": If the pad is currently active (#gboolean)
46 * "always-ok" : Make an inactive pads return #GST_FLOW_OK instead of
47 * #GST_FLOW_NOT_LINKED
60 #include "gstinputselector.h"
62 #include "gst/glib-compat-private.h"
64 #define DEBUG_CACHED_BUFFERS 0
66 GST_DEBUG_CATEGORY_STATIC (input_selector_debug);
67 #define GST_CAT_DEFAULT input_selector_debug
69 #define GST_TYPE_INPUT_SELECTOR_SYNC_MODE (gst_input_selector_sync_mode_get_type())
71 gst_input_selector_sync_mode_get_type (void)
73 static GType type = 0;
74 static const GEnumValue data[] = {
75 {GST_INPUT_SELECTOR_SYNC_MODE_ACTIVE_SEGMENT,
76 "Sync using the current active segment",
78 {GST_INPUT_SELECTOR_SYNC_MODE_CLOCK, "Sync using the clock", "clock"},
83 type = g_enum_register_static ("GstInputSelectorSyncMode", data);
88 #if GLIB_CHECK_VERSION(2, 26, 0)
89 #define NOTIFY_MUTEX_LOCK()
90 #define NOTIFY_MUTEX_UNLOCK()
92 static GStaticRecMutex notify_mutex = G_STATIC_REC_MUTEX_INIT;
93 #define NOTIFY_MUTEX_LOCK() g_static_rec_mutex_lock (¬ify_mutex)
94 #define NOTIFY_MUTEX_UNLOCK() g_static_rec_mutex_unlock (¬ify_mutex)
97 #define GST_INPUT_SELECTOR_GET_LOCK(sel) (&((GstInputSelector*)(sel))->lock)
98 #define GST_INPUT_SELECTOR_GET_COND(sel) (&((GstInputSelector*)(sel))->cond)
99 #define GST_INPUT_SELECTOR_LOCK(sel) (g_mutex_lock (GST_INPUT_SELECTOR_GET_LOCK(sel)))
100 #define GST_INPUT_SELECTOR_UNLOCK(sel) (g_mutex_unlock (GST_INPUT_SELECTOR_GET_LOCK(sel)))
101 #define GST_INPUT_SELECTOR_WAIT(sel) (g_cond_wait (GST_INPUT_SELECTOR_GET_COND(sel), \
102 GST_INPUT_SELECTOR_GET_LOCK(sel)))
103 #define GST_INPUT_SELECTOR_BROADCAST(sel) (g_cond_broadcast (GST_INPUT_SELECTOR_GET_COND(sel)))
105 static GstStaticPadTemplate gst_input_selector_sink_factory =
106 GST_STATIC_PAD_TEMPLATE ("sink_%u",
109 GST_STATIC_CAPS_ANY);
111 static GstStaticPadTemplate gst_input_selector_src_factory =
112 GST_STATIC_PAD_TEMPLATE ("src",
115 GST_STATIC_CAPS_ANY);
127 #define DEFAULT_SYNC_STREAMS TRUE
128 #define DEFAULT_SYNC_MODE GST_INPUT_SELECTOR_SYNC_MODE_ACTIVE_SEGMENT
129 #define DEFAULT_CACHE_BUFFERS FALSE
130 #define DEFAULT_PAD_ALWAYS_OK TRUE
135 PROP_PAD_RUNNING_TIME,
148 static guint gst_input_selector_signals[LAST_SIGNAL] = { 0 };
150 static void gst_input_selector_active_pad_changed (GstInputSelector * sel,
151 GParamSpec * pspec, gpointer user_data);
152 static inline gboolean gst_input_selector_is_active_sinkpad (GstInputSelector *
154 static GstPad *gst_input_selector_activate_sinkpad (GstInputSelector * sel,
156 static GstPad *gst_input_selector_get_linked_pad (GstInputSelector * sel,
157 GstPad * pad, gboolean strict);
159 #define GST_TYPE_SELECTOR_PAD \
160 (gst_selector_pad_get_type())
161 #define GST_SELECTOR_PAD(obj) \
162 (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_SELECTOR_PAD, GstSelectorPad))
163 #define GST_SELECTOR_PAD_CLASS(klass) \
164 (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_SELECTOR_PAD, GstSelectorPadClass))
165 #define GST_IS_SELECTOR_PAD(obj) \
166 (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_SELECTOR_PAD))
167 #define GST_IS_SELECTOR_PAD_CLASS(klass) \
168 (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_SELECTOR_PAD))
169 #define GST_SELECTOR_PAD_CAST(obj) \
170 ((GstSelectorPad *)(obj))
172 typedef struct _GstSelectorPad GstSelectorPad;
173 typedef struct _GstSelectorPadClass GstSelectorPadClass;
174 typedef struct _GstSelectorPadCachedBuffer GstSelectorPadCachedBuffer;
176 struct _GstSelectorPad
180 gboolean active; /* when buffer have passed the pad */
181 gboolean pushed; /* when buffer was pushed downstream since activation */
182 gboolean eos; /* when EOS has been received */
183 gboolean eos_sent; /* when EOS was sent downstream */
184 gboolean discont; /* after switching we create a discont */
185 gboolean flushing; /* set after flush-start and before flush-stop */
187 GstTagList *tags; /* last tags received on the pad */
189 GstClockTime position; /* the current position in the segment */
190 GstSegment segment; /* the current segment on the pad */
191 guint32 segment_seqnum; /* sequence number of the current segment */
193 gboolean events_pending; /* TRUE if sticky events need to be updated */
195 gboolean sending_cached_buffers;
196 GQueue *cached_buffers;
199 struct _GstSelectorPadCachedBuffer
205 struct _GstSelectorPadClass
210 GType gst_selector_pad_get_type (void);
211 static void gst_selector_pad_finalize (GObject * object);
212 static void gst_selector_pad_get_property (GObject * object,
213 guint prop_id, GValue * value, GParamSpec * pspec);
214 static void gst_selector_pad_set_property (GObject * object,
215 guint prop_id, const GValue * value, GParamSpec * pspec);
217 static gint64 gst_selector_pad_get_running_time (GstSelectorPad * pad);
218 static void gst_selector_pad_reset (GstSelectorPad * pad);
219 static gboolean gst_selector_pad_event (GstPad * pad, GstObject * parent,
221 static gboolean gst_selector_pad_query (GstPad * pad, GstObject * parent,
223 static GstIterator *gst_selector_pad_iterate_linked_pads (GstPad * pad,
225 static GstFlowReturn gst_selector_pad_chain (GstPad * pad, GstObject * parent,
227 static void gst_selector_pad_cache_buffer (GstSelectorPad * selpad,
229 static void gst_selector_pad_free_cached_buffers (GstSelectorPad * selpad);
231 G_DEFINE_TYPE (GstSelectorPad, gst_selector_pad, GST_TYPE_PAD);
234 gst_selector_pad_class_init (GstSelectorPadClass * klass)
236 GObjectClass *gobject_class;
238 gobject_class = (GObjectClass *) klass;
240 gobject_class->finalize = gst_selector_pad_finalize;
242 gobject_class->get_property = gst_selector_pad_get_property;
243 gobject_class->set_property = gst_selector_pad_set_property;
245 g_object_class_install_property (gobject_class, PROP_PAD_RUNNING_TIME,
246 g_param_spec_int64 ("running-time", "Running time",
247 "Running time of stream on pad", 0, G_MAXINT64, 0,
248 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
249 g_object_class_install_property (gobject_class, PROP_PAD_TAGS,
250 g_param_spec_boxed ("tags", "Tags",
251 "The currently active tags on the pad", GST_TYPE_TAG_LIST,
252 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
253 g_object_class_install_property (gobject_class, PROP_PAD_ACTIVE,
254 g_param_spec_boolean ("active", "Active",
255 "If the pad is currently active", FALSE,
256 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
257 /* FIXME: better property name? */
258 g_object_class_install_property (gobject_class, PROP_PAD_ALWAYS_OK,
259 g_param_spec_boolean ("always-ok", "Always OK",
260 "Make an inactive pad return OK instead of NOT_LINKED",
261 DEFAULT_PAD_ALWAYS_OK, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
265 gst_selector_pad_init (GstSelectorPad * pad)
267 pad->always_ok = DEFAULT_PAD_ALWAYS_OK;
268 gst_selector_pad_reset (pad);
272 gst_selector_pad_finalize (GObject * object)
276 pad = GST_SELECTOR_PAD_CAST (object);
279 gst_tag_list_unref (pad->tags);
280 gst_selector_pad_free_cached_buffers (pad);
282 G_OBJECT_CLASS (gst_selector_pad_parent_class)->finalize (object);
286 gst_selector_pad_set_property (GObject * object, guint prop_id,
287 const GValue * value, GParamSpec * pspec)
289 GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
292 case PROP_PAD_ALWAYS_OK:
293 GST_OBJECT_LOCK (object);
294 spad->always_ok = g_value_get_boolean (value);
295 GST_OBJECT_UNLOCK (object);
298 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
304 gst_selector_pad_get_property (GObject * object, guint prop_id,
305 GValue * value, GParamSpec * pspec)
307 GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
310 case PROP_PAD_RUNNING_TIME:
311 g_value_set_int64 (value, gst_selector_pad_get_running_time (spad));
314 GST_OBJECT_LOCK (object);
315 g_value_set_boxed (value, spad->tags);
316 GST_OBJECT_UNLOCK (object);
318 case PROP_PAD_ACTIVE:
320 GstInputSelector *sel;
322 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (spad));
323 g_value_set_boolean (value, gst_input_selector_is_active_sinkpad (sel,
324 GST_PAD_CAST (spad)));
325 gst_object_unref (sel);
328 case PROP_PAD_ALWAYS_OK:
329 GST_OBJECT_LOCK (object);
330 g_value_set_boolean (value, spad->always_ok);
331 GST_OBJECT_UNLOCK (object);
334 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
340 gst_selector_pad_get_running_time (GstSelectorPad * pad)
344 GST_OBJECT_LOCK (pad);
346 guint64 position = pad->position;
347 GstFormat format = pad->segment.format;
349 ret = gst_segment_to_running_time (&pad->segment, format, position);
351 GST_OBJECT_UNLOCK (pad);
353 GST_DEBUG_OBJECT (pad, "running time: %" GST_TIME_FORMAT
354 " segment: %" GST_SEGMENT_FORMAT, GST_TIME_ARGS (ret), &pad->segment);
359 /* must be called with the SELECTOR_LOCK */
361 gst_selector_pad_reset (GstSelectorPad * pad)
363 GST_OBJECT_LOCK (pad);
367 pad->eos_sent = FALSE;
368 pad->events_pending = FALSE;
369 pad->discont = FALSE;
370 pad->flushing = FALSE;
371 pad->position = GST_CLOCK_TIME_NONE;
372 gst_segment_init (&pad->segment, GST_FORMAT_UNDEFINED);
373 pad->sending_cached_buffers = FALSE;
374 gst_selector_pad_free_cached_buffers (pad);
375 GST_OBJECT_UNLOCK (pad);
378 static GstSelectorPadCachedBuffer *
379 gst_selector_pad_new_cached_buffer (GstSelectorPad * selpad, GstBuffer * buffer)
381 GstSelectorPadCachedBuffer *cached_buffer =
382 g_slice_new (GstSelectorPadCachedBuffer);
383 cached_buffer->buffer = buffer;
384 cached_buffer->segment = selpad->segment;
385 return cached_buffer;
389 gst_selector_pad_free_cached_buffer (GstSelectorPadCachedBuffer * cached_buffer)
391 gst_buffer_unref (cached_buffer->buffer);
392 g_slice_free (GstSelectorPadCachedBuffer, cached_buffer);
395 /* must be called with the SELECTOR_LOCK */
397 gst_selector_pad_cache_buffer (GstSelectorPad * selpad, GstBuffer * buffer)
399 if (selpad->segment.format != GST_FORMAT_TIME) {
400 GST_DEBUG_OBJECT (selpad, "Buffer %p with segment not in time format, "
401 "not caching", buffer);
405 GST_DEBUG_OBJECT (selpad, "Caching buffer %p", buffer);
406 if (!selpad->cached_buffers)
407 selpad->cached_buffers = g_queue_new ();
408 g_queue_push_tail (selpad->cached_buffers,
409 gst_selector_pad_new_cached_buffer (selpad, buffer));
412 /* must be called with the SELECTOR_LOCK */
414 gst_selector_pad_free_cached_buffers (GstSelectorPad * selpad)
416 GstSelectorPadCachedBuffer *cached_buffer;
418 if (!selpad->cached_buffers)
421 GST_DEBUG_OBJECT (selpad, "Freeing cached buffers");
422 while ((cached_buffer = g_queue_pop_head (selpad->cached_buffers)))
423 gst_selector_pad_free_cached_buffer (cached_buffer);
424 g_queue_free (selpad->cached_buffers);
425 selpad->cached_buffers = NULL;
428 /* strictly get the linked pad from the sinkpad. If the pad is active we return
429 * the srcpad else we return NULL */
431 gst_selector_pad_iterate_linked_pads (GstPad * pad, GstObject * parent)
433 GstInputSelector *sel;
435 GstIterator *it = NULL;
438 sel = GST_INPUT_SELECTOR (parent);
440 otherpad = gst_input_selector_get_linked_pad (sel, pad, TRUE);
442 g_value_init (&val, GST_TYPE_PAD);
443 g_value_set_object (&val, otherpad);
444 it = gst_iterator_new_single (GST_TYPE_PAD, &val);
445 g_value_unset (&val);
446 gst_object_unref (otherpad);
453 gst_selector_pad_event (GstPad * pad, GstObject * parent, GstEvent * event)
457 GstInputSelector *sel;
458 GstSelectorPad *selpad;
459 GstPad *prev_active_sinkpad;
460 GstPad *active_sinkpad;
462 sel = GST_INPUT_SELECTOR (parent);
463 selpad = GST_SELECTOR_PAD_CAST (pad);
464 GST_DEBUG_OBJECT (selpad, "received event %" GST_PTR_FORMAT, event);
466 GST_INPUT_SELECTOR_LOCK (sel);
467 prev_active_sinkpad = sel->active_sinkpad;
468 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
469 GST_INPUT_SELECTOR_UNLOCK (sel);
471 if (prev_active_sinkpad != active_sinkpad && pad == active_sinkpad) {
472 g_object_notify (G_OBJECT (sel), "active-pad");
475 GST_INPUT_SELECTOR_LOCK (sel);
476 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
478 /* only forward if we are dealing with the active sinkpad */
479 forward = (pad == active_sinkpad);
481 switch (GST_EVENT_TYPE (event)) {
482 case GST_EVENT_FLUSH_START:
483 /* Unblock the pad if it's waiting */
484 selpad->flushing = TRUE;
485 GST_INPUT_SELECTOR_BROADCAST (sel);
487 case GST_EVENT_FLUSH_STOP:
488 gst_selector_pad_reset (selpad);
490 case GST_EVENT_SEGMENT:
492 gst_event_copy_segment (event, &selpad->segment);
493 selpad->segment_seqnum = gst_event_get_seqnum (event);
495 /* Update the position */
496 if (selpad->position == GST_CLOCK_TIME_NONE
497 || selpad->segment.position > selpad->position) {
498 selpad->position = selpad->segment.position;
499 } else if (selpad->position != GST_CLOCK_TIME_NONE
500 && selpad->position > selpad->segment.position) {
501 selpad->segment.position = selpad->position;
504 gst_event_unref (event);
505 event = gst_event_new_segment (&selpad->segment);
506 gst_event_set_seqnum (event, selpad->segment_seqnum);
509 GST_DEBUG_OBJECT (pad, "configured SEGMENT %" GST_SEGMENT_FORMAT,
515 GstTagList *tags, *oldtags, *newtags;
517 gst_event_parse_tag (event, &tags);
519 oldtags = selpad->tags;
521 newtags = gst_tag_list_merge (oldtags, tags, GST_TAG_MERGE_REPLACE);
522 selpad->tags = newtags;
524 gst_tag_list_unref (oldtags);
525 GST_DEBUG_OBJECT (pad, "received tags %" GST_PTR_FORMAT, newtags);
527 g_object_notify (G_OBJECT (selpad), "tags");
534 selpad->eos_sent = TRUE;
536 GstSelectorPad *active_selpad;
538 /* If the active sinkpad is in EOS state but EOS
539 * was not sent downstream this means that the pad
540 * got EOS before it was set as active pad and that
541 * the previously active pad got EOS after it was
544 active_selpad = GST_SELECTOR_PAD (active_sinkpad);
545 forward = (active_selpad->eos && !active_selpad->eos_sent);
546 active_selpad->eos_sent = TRUE;
548 GST_DEBUG_OBJECT (pad, "received EOS");
553 GST_INPUT_SELECTOR_UNLOCK (sel);
555 GST_DEBUG_OBJECT (pad, "forwarding event");
556 res = gst_pad_push_event (sel->srcpad, event);
558 /* If we aren't forwarding the event because the pad is not the
559 * active_sinkpad, then set the flag on the pad
560 * that says a segment needs sending if/when that pad is activated.
561 * For all other cases, we send the event immediately, which makes
562 * sparse streams and other segment updates work correctly downstream.
564 if (GST_EVENT_IS_STICKY (event))
565 selpad->events_pending = TRUE;
566 gst_event_unref (event);
573 gst_selector_pad_query (GstPad * pad, GstObject * parent, GstQuery * query)
575 gboolean res = FALSE;
577 switch (GST_QUERY_TYPE (query)) {
578 case GST_QUERY_ALLOCATION:{
579 GstPad *active_sinkpad;
580 GstInputSelector *sel = GST_INPUT_SELECTOR (parent);
582 /* Only do the allocation query for the active sinkpad,
583 * after switching a reconfigure event is sent and upstream
584 * should reconfigure and do a new allocation query
586 if (GST_PAD_DIRECTION (pad) == GST_PAD_SINK) {
587 GST_INPUT_SELECTOR_LOCK (sel);
588 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
589 GST_INPUT_SELECTOR_UNLOCK (sel);
591 if (pad != active_sinkpad) {
599 res = gst_pad_query_default (pad, parent, query);
607 /* must be called with the SELECTOR_LOCK, will block while the pad is blocked
608 * or return TRUE when flushing */
610 gst_input_selector_wait (GstInputSelector * self, GstSelectorPad * pad)
612 while (self->blocked && !self->flushing && !pad->flushing) {
613 /* we can be unlocked here when we are shutting down (flushing) or when we
615 GST_INPUT_SELECTOR_WAIT (self);
617 return self->flushing;
620 /* must be called without the SELECTOR_LOCK, will wait until the running time
621 * of the active pad is after this pad or return TRUE when flushing */
623 gst_input_selector_wait_running_time (GstInputSelector * sel,
624 GstSelectorPad * selpad, GstBuffer * buf)
628 GST_DEBUG_OBJECT (selpad, "entering wait for buffer %p", buf);
630 /* If we have no valid timestamp we can't sync this buffer */
631 if (!GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
632 GST_DEBUG_OBJECT (selpad, "leaving wait for buffer with "
633 "invalid timestamp");
637 seg = &selpad->segment;
640 * a) this is the active pad
641 * b) the pad or the selector is flushing
642 * c) the selector is not blocked
643 * d) the buffer running time is before the current running time
644 * (either active-seg or clock, depending on sync-mode)
647 GST_INPUT_SELECTOR_LOCK (sel);
649 GstPad *active_sinkpad;
650 GstSelectorPad *active_selpad;
652 gint64 cur_running_time;
653 GstClockTime running_time;
656 gst_input_selector_activate_sinkpad (sel, GST_PAD_CAST (selpad));
657 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
659 if (seg->format != GST_FORMAT_TIME) {
660 GST_INPUT_SELECTOR_UNLOCK (sel);
664 running_time = GST_BUFFER_TIMESTAMP (buf);
665 /* If possible try to get the running time at the end of the buffer */
666 if (GST_BUFFER_DURATION_IS_VALID (buf))
667 running_time += GST_BUFFER_DURATION (buf);
668 /* Only use the segment to convert to running time if the segment is
669 * in TIME format, otherwise do our best to try to sync */
670 if (GST_CLOCK_TIME_IS_VALID (seg->stop)) {
671 if (running_time > seg->stop) {
672 running_time = seg->stop;
676 gst_segment_to_running_time (seg, GST_FORMAT_TIME, running_time);
677 /* If this is outside the segment don't sync */
678 if (running_time == -1) {
679 GST_INPUT_SELECTOR_UNLOCK (sel);
683 cur_running_time = GST_CLOCK_TIME_NONE;
684 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
685 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
687 GstClockTime base_time;
689 cur_running_time = gst_clock_get_time (clock);
690 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
691 if (base_time <= cur_running_time)
692 cur_running_time -= base_time;
694 cur_running_time = 0;
697 GstSegment *active_seg;
699 active_seg = &active_selpad->segment;
701 /* If the active segment is configured but not to time format
702 * we can't do any syncing at all */
703 if (active_seg->format != GST_FORMAT_TIME
704 && active_seg->format != GST_FORMAT_UNDEFINED) {
705 GST_INPUT_SELECTOR_UNLOCK (sel);
709 /* Get active pad's running time, if no configured segment yet keep at -1 */
710 if (active_seg->format == GST_FORMAT_TIME)
711 cur_running_time = gst_segment_to_running_time (active_seg,
712 GST_FORMAT_TIME, active_seg->position);
715 if (selpad != active_selpad && !sel->flushing && !selpad->flushing &&
716 (sel->cache_buffers || active_selpad->pushed) &&
717 (sel->blocked || cur_running_time == -1
718 || running_time >= cur_running_time)) {
720 GST_DEBUG_OBJECT (selpad,
721 "Waiting for active streams to advance. %" GST_TIME_FORMAT " >= %"
722 GST_TIME_FORMAT, GST_TIME_ARGS (running_time),
723 GST_TIME_ARGS (cur_running_time));
726 GST_INPUT_SELECTOR_WAIT (sel);
728 GST_INPUT_SELECTOR_UNLOCK (sel);
733 /* Return TRUE if the selector or the pad is flushing */
734 return (sel->flushing || selpad->flushing);
738 forward_sticky_events (GstPad * sinkpad, GstEvent ** event, gpointer user_data)
740 GstInputSelector *sel = GST_INPUT_SELECTOR (user_data);
742 if (GST_EVENT_TYPE (*event) == GST_EVENT_SEGMENT) {
743 GstSegment *seg = &GST_SELECTOR_PAD (sinkpad)->segment;
746 e = gst_event_new_segment (seg);
747 gst_event_set_seqnum (e, GST_SELECTOR_PAD_CAST (sinkpad)->segment_seqnum);
749 gst_pad_push_event (sel->srcpad, e);
751 gst_pad_push_event (sel->srcpad, gst_event_ref (*event));
757 #if DEBUG_CACHED_BUFFERS
759 gst_input_selector_debug_cached_buffers (GstInputSelector * sel)
763 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
764 GstSelectorPad *selpad;
769 selpad = GST_SELECTOR_PAD_CAST (walk->data);
770 if (!selpad->cached_buffers) {
771 GST_DEBUG_OBJECT (selpad, "Cached buffers timestamps: <none>");
775 timestamps = g_string_new ("Cached buffers timestamps:");
776 for (i = 0; i < selpad->cached_buffers->length; ++i) {
777 GstSelectorPadCachedBuffer *cached_buffer;
779 cached_buffer = g_queue_peek_nth (selpad->cached_buffers, i);
780 g_string_append_printf (timestamps, " %" GST_TIME_FORMAT,
781 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (cached_buffer->buffer)));
783 str = g_string_free (timestamps, FALSE);
784 GST_DEBUG_OBJECT (selpad, str);
790 /* must be called with the SELECTOR_LOCK */
792 gst_input_selector_cleanup_old_cached_buffers (GstInputSelector * sel,
796 gint64 cur_running_time;
799 cur_running_time = GST_CLOCK_TIME_NONE;
800 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
801 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
803 GstClockTime base_time;
805 cur_running_time = gst_clock_get_time (clock);
806 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
807 if (base_time <= cur_running_time)
808 cur_running_time -= base_time;
810 cur_running_time = 0;
813 GstPad *active_sinkpad;
814 GstSelectorPad *active_selpad;
815 GstSegment *active_seg;
817 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
818 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
819 active_seg = &active_selpad->segment;
821 /* Get active pad's running time, if no configured segment yet keep at -1 */
822 if (active_seg->format == GST_FORMAT_TIME)
823 cur_running_time = gst_segment_to_running_time (active_seg,
824 GST_FORMAT_TIME, active_seg->position);
827 if (!GST_CLOCK_TIME_IS_VALID (cur_running_time))
830 GST_DEBUG_OBJECT (sel, "Cleaning up old cached buffers");
831 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
832 GstSelectorPad *selpad;
834 GstSelectorPadCachedBuffer *cached_buffer;
835 GSList *maybe_remove;
836 guint queue_position;
838 selpad = GST_SELECTOR_PAD_CAST (walk->data);
839 if (!selpad->cached_buffers)
842 seg = &selpad->segment;
846 while ((cached_buffer = g_queue_peek_nth (selpad->cached_buffers,
848 GstBuffer *buffer = cached_buffer->buffer;
849 GstClockTime running_time;
852 /* If we have no valid timestamp we can't sync this buffer */
853 if (!GST_BUFFER_TIMESTAMP_IS_VALID (buffer)) {
854 maybe_remove = g_slist_append (maybe_remove, cached_buffer);
855 queue_position = g_slist_length (maybe_remove);
859 /* the buffer is still valid if its duration is valid and the
860 * timestamp + duration is >= time, or if its duration is invalid
861 * and the timestamp is >= time */
862 running_time = GST_BUFFER_TIMESTAMP (buffer);
863 /* If possible try to get the running time at the end of the buffer */
864 if (GST_BUFFER_DURATION_IS_VALID (buffer))
865 running_time += GST_BUFFER_DURATION (buffer);
866 /* Only use the segment to convert to running time if the segment is
867 * in TIME format, otherwise do our best to try to sync */
868 if (GST_CLOCK_TIME_IS_VALID (seg->stop)) {
869 if (running_time > seg->stop) {
870 running_time = seg->stop;
874 gst_segment_to_running_time (seg, GST_FORMAT_TIME, running_time);
876 GST_DEBUG_OBJECT (selpad,
877 "checking if buffer %p running time=%" GST_TIME_FORMAT
878 " >= stream time=%" GST_TIME_FORMAT, buffer,
879 GST_TIME_ARGS (running_time), GST_TIME_ARGS (cur_running_time));
880 if (running_time >= cur_running_time) {
884 GST_DEBUG_OBJECT (selpad, "Removing old cached buffer %p", buffer);
885 g_queue_pop_nth (selpad->cached_buffers, queue_position);
886 gst_selector_pad_free_cached_buffer (cached_buffer);
888 for (l = maybe_remove; l != NULL; l = g_slist_next (l)) {
889 /* A buffer after some invalid buffers was removed, it means the invalid buffers
890 * are old, lets also remove them */
891 cached_buffer = l->data;
892 g_queue_remove (selpad->cached_buffers, cached_buffer);
893 gst_selector_pad_free_cached_buffer (cached_buffer);
896 g_slist_free (maybe_remove);
901 g_slist_free (maybe_remove);
904 if (g_queue_is_empty (selpad->cached_buffers)) {
905 g_queue_free (selpad->cached_buffers);
906 selpad->cached_buffers = NULL;
910 #if DEBUG_CACHED_BUFFERS
911 gst_input_selector_debug_cached_buffers (sel);
916 gst_selector_pad_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
918 GstInputSelector *sel;
920 GstPad *active_sinkpad;
921 GstPad *prev_active_sinkpad;
922 GstSelectorPad *selpad;
923 GstClockTime start_time;
925 sel = GST_INPUT_SELECTOR (parent);
926 selpad = GST_SELECTOR_PAD_CAST (pad);
928 GST_DEBUG_OBJECT (selpad,
929 "entering chain for buf %p with timestamp %" GST_TIME_FORMAT, buf,
930 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
932 GST_INPUT_SELECTOR_LOCK (sel);
933 /* wait or check for flushing */
934 if (gst_input_selector_wait (sel, selpad)) {
935 GST_INPUT_SELECTOR_UNLOCK (sel);
939 GST_LOG_OBJECT (pad, "getting active pad");
941 prev_active_sinkpad = sel->active_sinkpad;
942 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
944 /* In sync mode wait until the active pad has advanced
945 * after the running time of the current buffer */
946 if (sel->sync_streams) {
947 /* call chain for each cached buffer if we are not the active pad
948 * or if we are the active pad but didn't push anything yet. */
949 if (active_sinkpad != pad || !selpad->pushed) {
950 /* no need to check for sel->cache_buffers as selpad->cached_buffers
951 * will only be valid if cache_buffers is TRUE */
952 if (selpad->cached_buffers && !selpad->sending_cached_buffers) {
953 GstSelectorPadCachedBuffer *cached_buffer;
954 GstSegment saved_segment;
956 saved_segment = selpad->segment;
958 selpad->sending_cached_buffers = TRUE;
959 while (!sel->flushing && !selpad->flushing &&
960 (cached_buffer = g_queue_pop_head (selpad->cached_buffers))) {
961 GST_DEBUG_OBJECT (pad, "Cached buffers found, "
962 "invoking chain for cached buffer %p", cached_buffer->buffer);
964 selpad->segment = cached_buffer->segment;
965 selpad->events_pending = TRUE;
966 GST_INPUT_SELECTOR_UNLOCK (sel);
967 gst_selector_pad_chain (pad, parent, cached_buffer->buffer);
968 GST_INPUT_SELECTOR_LOCK (sel);
970 /* we may have cleaned up the queue in the meantime because of
972 if (!selpad->cached_buffers) {
976 selpad->sending_cached_buffers = FALSE;
978 /* all cached buffers sent, restore segment for current buffer */
979 selpad->segment = saved_segment;
980 selpad->events_pending = TRUE;
982 /* Might have changed while calling chain for cached buffers */
983 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
987 if (active_sinkpad != pad) {
988 GST_INPUT_SELECTOR_UNLOCK (sel);
989 if (gst_input_selector_wait_running_time (sel, selpad, buf))
991 GST_INPUT_SELECTOR_LOCK (sel);
994 /* Might have changed while waiting */
995 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
998 /* update the segment on the srcpad */
999 start_time = GST_BUFFER_TIMESTAMP (buf);
1000 if (GST_CLOCK_TIME_IS_VALID (start_time)) {
1001 GST_LOG_OBJECT (pad, "received start time %" GST_TIME_FORMAT,
1002 GST_TIME_ARGS (start_time));
1003 if (GST_BUFFER_DURATION_IS_VALID (buf))
1004 GST_LOG_OBJECT (pad, "received end time %" GST_TIME_FORMAT,
1005 GST_TIME_ARGS (start_time + GST_BUFFER_DURATION (buf)));
1007 GST_OBJECT_LOCK (pad);
1008 selpad->position = start_time;
1009 selpad->segment.position = start_time;
1010 GST_OBJECT_UNLOCK (pad);
1013 /* Ignore buffers from pads except the selected one */
1014 if (pad != active_sinkpad)
1017 /* Tell all non-active pads that we advanced the running time */
1018 if (sel->sync_streams)
1019 GST_INPUT_SELECTOR_BROADCAST (sel);
1021 GST_INPUT_SELECTOR_UNLOCK (sel);
1023 if (prev_active_sinkpad != active_sinkpad && pad == active_sinkpad) {
1024 g_object_notify (G_OBJECT (sel), "active-pad");
1027 /* if we have a pending events, push them now */
1028 if (G_UNLIKELY (prev_active_sinkpad != active_sinkpad
1029 || selpad->events_pending)) {
1030 gst_pad_sticky_events_foreach (GST_PAD_CAST (selpad), forward_sticky_events,
1032 selpad->events_pending = FALSE;
1035 if (selpad->discont) {
1036 buf = gst_buffer_make_writable (buf);
1038 GST_DEBUG_OBJECT (pad, "Marking discont buffer %p", buf);
1039 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
1040 selpad->discont = FALSE;
1044 GST_LOG_OBJECT (pad, "Forwarding buffer %p with timestamp %" GST_TIME_FORMAT,
1045 buf, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
1047 res = gst_pad_push (sel->srcpad, gst_buffer_ref (buf));
1048 GST_LOG_OBJECT (pad, "Buffer %p forwarded result=%d", buf, res);
1050 GST_INPUT_SELECTOR_LOCK (sel);
1052 if (sel->sync_streams && sel->cache_buffers) {
1053 /* Might have changed while pushing */
1054 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
1055 /* only set pad to pushed if we are still the active pad */
1056 if (active_sinkpad == pad)
1057 selpad->pushed = TRUE;
1059 /* cache buffer as we may need it again if we change pads */
1060 gst_selector_pad_cache_buffer (selpad, buf);
1061 gst_input_selector_cleanup_old_cached_buffers (sel, pad);
1063 selpad->pushed = TRUE;
1064 gst_buffer_unref (buf);
1066 GST_INPUT_SELECTOR_UNLOCK (sel);
1071 /* dropped buffers */
1074 gboolean active_pad_pushed = GST_SELECTOR_PAD_CAST (active_sinkpad)->pushed;
1076 GST_DEBUG_OBJECT (pad, "Pad not active, discard buffer %p", buf);
1077 /* when we drop a buffer, we're creating a discont on this pad */
1078 selpad->discont = TRUE;
1079 GST_INPUT_SELECTOR_UNLOCK (sel);
1080 gst_buffer_unref (buf);
1082 /* figure out what to return upstream */
1083 GST_OBJECT_LOCK (selpad);
1084 if (selpad->always_ok || !active_pad_pushed)
1087 res = GST_FLOW_NOT_LINKED;
1088 GST_OBJECT_UNLOCK (selpad);
1094 GST_DEBUG_OBJECT (pad, "We are flushing, discard buffer %p", buf);
1095 gst_buffer_unref (buf);
1096 res = GST_FLOW_FLUSHING;
1101 static void gst_input_selector_dispose (GObject * object);
1102 static void gst_input_selector_finalize (GObject * object);
1104 static void gst_input_selector_set_property (GObject * object,
1105 guint prop_id, const GValue * value, GParamSpec * pspec);
1106 static void gst_input_selector_get_property (GObject * object,
1107 guint prop_id, GValue * value, GParamSpec * pspec);
1109 static GstPad *gst_input_selector_request_new_pad (GstElement * element,
1110 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps);
1111 static void gst_input_selector_release_pad (GstElement * element, GstPad * pad);
1113 static GstStateChangeReturn gst_input_selector_change_state (GstElement *
1114 element, GstStateChange transition);
1116 static gboolean gst_input_selector_event (GstPad * pad, GstObject * parent,
1118 static gboolean gst_input_selector_query (GstPad * pad, GstObject * parent,
1120 static gint64 gst_input_selector_block (GstInputSelector * self);
1122 /* FIXME: create these marshallers using glib-genmarshal */
1124 gst_input_selector_marshal_INT64__VOID (GClosure * closure,
1125 GValue * return_value G_GNUC_UNUSED,
1126 guint n_param_values,
1127 const GValue * param_values,
1128 gpointer invocation_hint G_GNUC_UNUSED, gpointer marshal_data)
1130 typedef gint64 (*GMarshalFunc_INT64__VOID) (gpointer data1, gpointer data2);
1131 register GMarshalFunc_INT64__VOID callback;
1132 register GCClosure *cc = (GCClosure *) closure;
1133 register gpointer data1, data2;
1136 g_return_if_fail (return_value != NULL);
1137 g_return_if_fail (n_param_values == 1);
1139 if (G_CCLOSURE_SWAP_DATA (closure)) {
1140 data1 = closure->data;
1141 data2 = g_value_peek_pointer (param_values + 0);
1143 data1 = g_value_peek_pointer (param_values + 0);
1144 data2 = closure->data;
1147 (GMarshalFunc_INT64__VOID) (marshal_data ? marshal_data : cc->callback);
1149 v_return = callback (data1, data2);
1151 g_value_set_int64 (return_value, v_return);
1155 GST_DEBUG_CATEGORY_INIT (input_selector_debug, \
1156 "input-selector", 0, "An input stream selector element");
1157 #define gst_input_selector_parent_class parent_class
1158 G_DEFINE_TYPE_WITH_CODE (GstInputSelector, gst_input_selector, GST_TYPE_ELEMENT,
1162 gst_input_selector_class_init (GstInputSelectorClass * klass)
1164 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
1165 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
1167 gobject_class->dispose = gst_input_selector_dispose;
1168 gobject_class->finalize = gst_input_selector_finalize;
1170 gobject_class->set_property = gst_input_selector_set_property;
1171 gobject_class->get_property = gst_input_selector_get_property;
1173 g_object_class_install_property (gobject_class, PROP_N_PADS,
1174 g_param_spec_uint ("n-pads", "Number of Pads",
1175 "The number of sink pads", 0, G_MAXUINT, 0,
1176 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
1178 g_object_class_install_property (gobject_class, PROP_ACTIVE_PAD,
1179 g_param_spec_object ("active-pad", "Active pad",
1180 "The currently active sink pad", GST_TYPE_PAD,
1181 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
1184 * GstInputSelector:sync-streams
1186 * If set to %TRUE all inactive streams will be synced to the
1187 * running time of the active stream or to the current clock.
1189 * To make sure no buffers are dropped by input-selector
1190 * that might be needed when switching the active pad,
1191 * sync-mode should be set to "clock" and cache-buffers to TRUE.
1195 g_object_class_install_property (gobject_class, PROP_SYNC_STREAMS,
1196 g_param_spec_boolean ("sync-streams", "Sync Streams",
1197 "Synchronize inactive streams to the running time of the active "
1198 "stream or to the current clock",
1199 DEFAULT_SYNC_STREAMS,
1200 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1201 GST_PARAM_MUTABLE_READY));
1204 * GstInputSelector:sync-mode
1206 * Select how input-selector will sync buffers when in sync-streams mode.
1208 * Note that when using the "active-segment" mode, the "active-segment" may
1209 * be ahead of current clock time when switching the active pad, as the current
1210 * active pad may have pushed more buffers than what was displayed/consumed,
1211 * which may cause delays and some missing buffers.
1215 g_object_class_install_property (gobject_class, PROP_SYNC_MODE,
1216 g_param_spec_enum ("sync-mode", "Sync mode",
1217 "Behavior in sync-streams mode", GST_TYPE_INPUT_SELECTOR_SYNC_MODE,
1219 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1220 GST_PARAM_MUTABLE_READY));
1223 * GstInputSelector:cache-buffers
1225 * If set to %TRUE and GstInputSelector:sync-streams is also set to %TRUE,
1226 * the active pad will cache the buffers still considered valid (after current
1227 * running time, see sync-mode) to avoid missing frames if/when the pad is
1230 * The active pad may push more buffers than what is currently displayed/consumed
1231 * and when changing pads those buffers will be discarded and the only way to
1232 * reactivate that pad without loosing the already consumed buffers is to enable cache.
1234 g_object_class_install_property (gobject_class, PROP_CACHE_BUFFERS,
1235 g_param_spec_boolean ("cache-buffers", "Cache Buffers",
1236 "Cache buffers for active-pad",
1237 DEFAULT_CACHE_BUFFERS,
1238 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1239 GST_PARAM_MUTABLE_READY));
1242 * GstInputSelector::block:
1243 * @inputselector: the #GstInputSelector
1245 * Block all sink pads in preparation for a switch. Returns the stop time of
1246 * the current switch segment, as a running time, or 0 if there is no current
1247 * active pad or the current active pad never received data.
1249 gst_input_selector_signals[SIGNAL_BLOCK] =
1250 g_signal_new ("block", G_TYPE_FROM_CLASS (klass),
1251 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1252 G_STRUCT_OFFSET (GstInputSelectorClass, block), NULL, NULL,
1253 gst_input_selector_marshal_INT64__VOID, G_TYPE_INT64, 0);
1255 gst_element_class_set_static_metadata (gstelement_class, "Input selector",
1256 "Generic", "N-to-1 input stream selector",
1257 "Julien Moutte <julien@moutte.net>, "
1258 "Jan Schmidt <thaytan@mad.scientist.com>, "
1259 "Wim Taymans <wim.taymans@gmail.com>");
1260 gst_element_class_add_pad_template (gstelement_class,
1261 gst_static_pad_template_get (&gst_input_selector_sink_factory));
1262 gst_element_class_add_pad_template (gstelement_class,
1263 gst_static_pad_template_get (&gst_input_selector_src_factory));
1265 gstelement_class->request_new_pad = gst_input_selector_request_new_pad;
1266 gstelement_class->release_pad = gst_input_selector_release_pad;
1267 gstelement_class->change_state = gst_input_selector_change_state;
1269 klass->block = GST_DEBUG_FUNCPTR (gst_input_selector_block);
1273 gst_input_selector_init (GstInputSelector * sel)
1275 sel->srcpad = gst_pad_new ("src", GST_PAD_SRC);
1276 gst_pad_set_iterate_internal_links_function (sel->srcpad,
1277 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1278 gst_pad_set_query_function (sel->srcpad,
1279 GST_DEBUG_FUNCPTR (gst_input_selector_query));
1280 gst_pad_set_event_function (sel->srcpad,
1281 GST_DEBUG_FUNCPTR (gst_input_selector_event));
1282 GST_OBJECT_FLAG_SET (sel->srcpad, GST_PAD_FLAG_PROXY_CAPS);
1283 gst_element_add_pad (GST_ELEMENT (sel), sel->srcpad);
1284 /* sinkpad management */
1285 sel->active_sinkpad = NULL;
1287 sel->sync_streams = DEFAULT_SYNC_STREAMS;
1289 g_mutex_init (&sel->lock);
1290 g_cond_init (&sel->cond);
1291 sel->blocked = FALSE;
1293 /* lets give a change for downstream to do something on
1294 * active-pad change before we start pushing new buffers */
1295 g_signal_connect_data (sel, "notify::active-pad",
1296 (GCallback) gst_input_selector_active_pad_changed, NULL,
1297 NULL, G_CONNECT_AFTER);
1301 gst_input_selector_dispose (GObject * object)
1303 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1305 if (sel->active_sinkpad) {
1306 gst_object_unref (sel->active_sinkpad);
1307 sel->active_sinkpad = NULL;
1309 G_OBJECT_CLASS (parent_class)->dispose (object);
1313 gst_input_selector_finalize (GObject * object)
1315 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1317 g_mutex_clear (&sel->lock);
1318 g_cond_clear (&sel->cond);
1320 G_OBJECT_CLASS (parent_class)->finalize (object);
1323 /* this function must be called with the SELECTOR_LOCK. It returns TRUE when the
1324 * active pad changed. */
1326 gst_input_selector_set_active_pad (GstInputSelector * self, GstPad * pad)
1328 GstSelectorPad *old, *new;
1329 GstPad **active_pad_p;
1331 if (pad == self->active_sinkpad)
1334 old = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
1335 new = GST_SELECTOR_PAD_CAST (pad);
1337 GST_DEBUG_OBJECT (self, "setting active pad to %s:%s",
1338 GST_DEBUG_PAD_NAME (new));
1341 old->pushed = FALSE;
1343 new->pushed = FALSE;
1345 /* Send a new SEGMENT event on the new pad next */
1346 if (old != new && new)
1347 new->events_pending = TRUE;
1349 active_pad_p = &self->active_sinkpad;
1350 gst_object_replace ((GstObject **) active_pad_p, GST_OBJECT_CAST (pad));
1352 if (old && old != new)
1353 gst_pad_push_event (GST_PAD_CAST (old), gst_event_new_reconfigure ());
1355 gst_pad_push_event (GST_PAD_CAST (new), gst_event_new_reconfigure ());
1357 GST_DEBUG_OBJECT (self, "New active pad is %" GST_PTR_FORMAT,
1358 self->active_sinkpad);
1364 gst_input_selector_set_property (GObject * object, guint prop_id,
1365 const GValue * value, GParamSpec * pspec)
1367 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1370 case PROP_ACTIVE_PAD:
1374 pad = g_value_get_object (value);
1376 GST_INPUT_SELECTOR_LOCK (sel);
1378 #if DEBUG_CACHED_BUFFERS
1379 gst_input_selector_debug_cached_buffers (sel);
1382 gst_input_selector_set_active_pad (sel, pad);
1384 #if DEBUG_CACHED_BUFFERS
1385 gst_input_selector_debug_cached_buffers (sel);
1388 GST_INPUT_SELECTOR_UNLOCK (sel);
1391 case PROP_SYNC_STREAMS:
1392 GST_INPUT_SELECTOR_LOCK (sel);
1393 sel->sync_streams = g_value_get_boolean (value);
1394 GST_INPUT_SELECTOR_UNLOCK (sel);
1396 case PROP_SYNC_MODE:
1397 GST_INPUT_SELECTOR_LOCK (sel);
1398 sel->sync_mode = g_value_get_enum (value);
1399 GST_INPUT_SELECTOR_UNLOCK (sel);
1401 case PROP_CACHE_BUFFERS:
1402 GST_INPUT_SELECTOR_LOCK (object);
1403 sel->cache_buffers = g_value_get_boolean (value);
1404 GST_INPUT_SELECTOR_UNLOCK (object);
1407 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1413 gst_input_selector_active_pad_changed (GstInputSelector * sel,
1414 GParamSpec * pspec, gpointer user_data)
1416 /* Wake up all non-active pads in sync mode, they might be
1417 * the active pad now */
1418 if (sel->sync_streams)
1419 GST_INPUT_SELECTOR_BROADCAST (sel);
1423 gst_input_selector_get_property (GObject * object, guint prop_id,
1424 GValue * value, GParamSpec * pspec)
1426 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1430 GST_INPUT_SELECTOR_LOCK (object);
1431 g_value_set_uint (value, sel->n_pads);
1432 GST_INPUT_SELECTOR_UNLOCK (object);
1434 case PROP_ACTIVE_PAD:
1435 GST_INPUT_SELECTOR_LOCK (object);
1436 g_value_set_object (value, sel->active_sinkpad);
1437 GST_INPUT_SELECTOR_UNLOCK (object);
1439 case PROP_SYNC_STREAMS:
1440 GST_INPUT_SELECTOR_LOCK (object);
1441 g_value_set_boolean (value, sel->sync_streams);
1442 GST_INPUT_SELECTOR_UNLOCK (object);
1444 case PROP_SYNC_MODE:
1445 GST_INPUT_SELECTOR_LOCK (object);
1446 g_value_set_enum (value, sel->sync_mode);
1447 GST_INPUT_SELECTOR_UNLOCK (object);
1449 case PROP_CACHE_BUFFERS:
1450 GST_INPUT_SELECTOR_LOCK (object);
1451 g_value_set_boolean (value, sel->cache_buffers);
1452 GST_INPUT_SELECTOR_UNLOCK (object);
1455 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1461 gst_input_selector_get_linked_pad (GstInputSelector * sel, GstPad * pad,
1464 GstPad *otherpad = NULL;
1466 GST_INPUT_SELECTOR_LOCK (sel);
1467 if (pad == sel->srcpad)
1468 otherpad = sel->active_sinkpad;
1469 else if (pad == sel->active_sinkpad || !strict)
1470 otherpad = sel->srcpad;
1472 gst_object_ref (otherpad);
1473 GST_INPUT_SELECTOR_UNLOCK (sel);
1479 gst_input_selector_event (GstPad * pad, GstObject * parent, GstEvent * event)
1481 GstInputSelector *sel;
1482 gboolean result = FALSE;
1484 gboolean done = FALSE;
1485 GValue item = { 0, };
1487 GList *pushed_pads = NULL;
1489 sel = GST_INPUT_SELECTOR (parent);
1490 /* Send upstream events to all sinkpads */
1491 iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1493 /* This is now essentially a copy of gst_pad_event_default_dispatch
1494 * with a different iterator */
1496 switch (gst_iterator_next (iter, &item)) {
1497 case GST_ITERATOR_OK:
1498 eventpad = g_value_get_object (&item);
1500 /* if already pushed, skip */
1501 if (g_list_find (pushed_pads, eventpad)) {
1502 g_value_reset (&item);
1506 gst_event_ref (event);
1507 result |= gst_pad_push_event (eventpad, event);
1509 g_value_reset (&item);
1511 case GST_ITERATOR_RESYNC:
1512 /* We don't reset the result here because we don't push the event
1513 * again on pads that got the event already and because we need
1514 * to consider the result of the previous pushes */
1515 gst_iterator_resync (iter);
1517 case GST_ITERATOR_ERROR:
1518 GST_ERROR_OBJECT (pad, "Could not iterate over sinkpads");
1521 case GST_ITERATOR_DONE:
1526 g_value_unset (&item);
1527 gst_iterator_free (iter);
1529 g_list_free (pushed_pads);
1531 gst_event_unref (event);
1536 /* query on the srcpad. We override this function because by default it will
1537 * only forward the query to one random sinkpad */
1539 gst_input_selector_query (GstPad * pad, GstObject * parent, GstQuery * query)
1541 gboolean res = FALSE;
1542 GstInputSelector *sel;
1544 sel = GST_INPUT_SELECTOR (parent);
1546 switch (GST_QUERY_TYPE (query)) {
1547 case GST_QUERY_LATENCY:
1550 GstClockTime resmin, resmax;
1557 /* perform the query on all sinkpads and combine the results. We take the
1558 * max of min and the min of max for the result latency. */
1559 GST_INPUT_SELECTOR_LOCK (sel);
1560 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk;
1561 walk = g_list_next (walk)) {
1562 GstPad *sinkpad = GST_PAD_CAST (walk->data);
1564 if (gst_pad_peer_query (sinkpad, query)) {
1565 GstClockTime min, max;
1568 /* one query succeeded, we succeed too */
1571 gst_query_parse_latency (query, &live, &min, &max);
1573 GST_DEBUG_OBJECT (sinkpad,
1574 "peer latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
1575 ", live %d", GST_TIME_ARGS (min), GST_TIME_ARGS (max), live);
1582 else if (max < resmax)
1584 if (reslive == FALSE)
1589 GST_INPUT_SELECTOR_UNLOCK (sel);
1591 gst_query_set_latency (query, reslive, resmin, resmax);
1593 GST_DEBUG_OBJECT (sel,
1594 "total latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
1595 ", live %d", GST_TIME_ARGS (resmin), GST_TIME_ARGS (resmax),
1602 res = gst_pad_query_default (pad, parent, query);
1609 /* check if the pad is the active sinkpad */
1610 static inline gboolean
1611 gst_input_selector_is_active_sinkpad (GstInputSelector * sel, GstPad * pad)
1615 GST_INPUT_SELECTOR_LOCK (sel);
1616 res = (pad == sel->active_sinkpad);
1617 GST_INPUT_SELECTOR_UNLOCK (sel);
1622 /* Get or create the active sinkpad, must be called with SELECTOR_LOCK */
1624 gst_input_selector_activate_sinkpad (GstInputSelector * sel, GstPad * pad)
1626 GstPad *active_sinkpad;
1627 GstSelectorPad *selpad;
1629 selpad = GST_SELECTOR_PAD_CAST (pad);
1631 selpad->active = TRUE;
1632 active_sinkpad = sel->active_sinkpad;
1633 if (active_sinkpad == NULL) {
1634 /* first pad we get activity on becomes the activated pad by default */
1635 if (sel->active_sinkpad)
1636 gst_object_unref (sel->active_sinkpad);
1637 active_sinkpad = sel->active_sinkpad = gst_object_ref (pad);
1638 GST_DEBUG_OBJECT (sel, "Activating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1641 return active_sinkpad;
1645 gst_input_selector_request_new_pad (GstElement * element,
1646 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps)
1648 GstInputSelector *sel;
1650 GstPad *sinkpad = NULL;
1652 g_return_val_if_fail (templ->direction == GST_PAD_SINK, NULL);
1654 sel = GST_INPUT_SELECTOR (element);
1656 GST_INPUT_SELECTOR_LOCK (sel);
1658 GST_LOG_OBJECT (sel, "Creating new pad %d", sel->padcount);
1659 name = g_strdup_printf ("sink_%u", sel->padcount++);
1660 sinkpad = g_object_new (GST_TYPE_SELECTOR_PAD,
1661 "name", name, "direction", templ->direction, "template", templ, NULL);
1666 gst_pad_set_event_function (sinkpad,
1667 GST_DEBUG_FUNCPTR (gst_selector_pad_event));
1668 gst_pad_set_query_function (sinkpad,
1669 GST_DEBUG_FUNCPTR (gst_selector_pad_query));
1670 gst_pad_set_chain_function (sinkpad,
1671 GST_DEBUG_FUNCPTR (gst_selector_pad_chain));
1672 gst_pad_set_iterate_internal_links_function (sinkpad,
1673 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1675 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_CAPS);
1676 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_ALLOCATION);
1677 gst_pad_set_active (sinkpad, TRUE);
1678 gst_element_add_pad (GST_ELEMENT (sel), sinkpad);
1679 GST_INPUT_SELECTOR_UNLOCK (sel);
1685 gst_input_selector_release_pad (GstElement * element, GstPad * pad)
1687 GstInputSelector *sel;
1689 sel = GST_INPUT_SELECTOR (element);
1690 GST_LOG_OBJECT (sel, "Releasing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1692 GST_INPUT_SELECTOR_LOCK (sel);
1693 /* if the pad was the active pad, makes us select a new one */
1694 if (sel->active_sinkpad == pad) {
1695 GST_DEBUG_OBJECT (sel, "Deactivating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1696 gst_object_unref (sel->active_sinkpad);
1697 sel->active_sinkpad = NULL;
1701 gst_pad_set_active (pad, FALSE);
1702 gst_element_remove_pad (GST_ELEMENT (sel), pad);
1703 GST_INPUT_SELECTOR_UNLOCK (sel);
1707 gst_input_selector_reset (GstInputSelector * sel)
1711 GST_INPUT_SELECTOR_LOCK (sel);
1712 /* clear active pad */
1713 if (sel->active_sinkpad) {
1714 gst_object_unref (sel->active_sinkpad);
1715 sel->active_sinkpad = NULL;
1717 /* reset each of our sinkpads state */
1718 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
1719 GstSelectorPad *selpad = GST_SELECTOR_PAD_CAST (walk->data);
1721 gst_selector_pad_reset (selpad);
1724 gst_tag_list_unref (selpad->tags);
1725 selpad->tags = NULL;
1728 GST_INPUT_SELECTOR_UNLOCK (sel);
1731 static GstStateChangeReturn
1732 gst_input_selector_change_state (GstElement * element,
1733 GstStateChange transition)
1735 GstInputSelector *self = GST_INPUT_SELECTOR (element);
1736 GstStateChangeReturn result;
1738 switch (transition) {
1739 case GST_STATE_CHANGE_READY_TO_PAUSED:
1740 GST_INPUT_SELECTOR_LOCK (self);
1741 self->blocked = FALSE;
1742 self->flushing = FALSE;
1743 GST_INPUT_SELECTOR_UNLOCK (self);
1745 case GST_STATE_CHANGE_PAUSED_TO_READY:
1746 /* first unlock before we call the parent state change function, which
1747 * tries to acquire the stream lock when going to ready. */
1748 GST_INPUT_SELECTOR_LOCK (self);
1749 self->blocked = FALSE;
1750 self->flushing = TRUE;
1751 GST_INPUT_SELECTOR_BROADCAST (self);
1752 GST_INPUT_SELECTOR_UNLOCK (self);
1758 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1760 switch (transition) {
1761 case GST_STATE_CHANGE_PAUSED_TO_READY:
1762 gst_input_selector_reset (self);
1772 gst_input_selector_block (GstInputSelector * self)
1775 GstSelectorPad *spad;
1777 GST_INPUT_SELECTOR_LOCK (self);
1780 GST_WARNING_OBJECT (self, "switch already blocked");
1782 self->blocked = TRUE;
1783 spad = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
1786 ret = gst_selector_pad_get_running_time (spad);
1788 GST_DEBUG_OBJECT (self, "no active pad while blocking");
1790 GST_INPUT_SELECTOR_UNLOCK (self);