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 GST_DEBUG_OBJECT (selpad, "Caching buffer %p", buffer);
400 if (!selpad->cached_buffers)
401 selpad->cached_buffers = g_queue_new ();
402 g_queue_push_tail (selpad->cached_buffers,
403 gst_selector_pad_new_cached_buffer (selpad, buffer));
406 /* must be called with the SELECTOR_LOCK */
408 gst_selector_pad_free_cached_buffers (GstSelectorPad * selpad)
410 GstSelectorPadCachedBuffer *cached_buffer;
412 if (!selpad->cached_buffers)
415 GST_DEBUG_OBJECT (selpad, "Freeing cached buffers");
416 while ((cached_buffer = g_queue_pop_head (selpad->cached_buffers)))
417 gst_selector_pad_free_cached_buffer (cached_buffer);
418 g_queue_free (selpad->cached_buffers);
419 selpad->cached_buffers = NULL;
422 /* strictly get the linked pad from the sinkpad. If the pad is active we return
423 * the srcpad else we return NULL */
425 gst_selector_pad_iterate_linked_pads (GstPad * pad, GstObject * parent)
427 GstInputSelector *sel;
429 GstIterator *it = NULL;
432 sel = GST_INPUT_SELECTOR (parent);
434 otherpad = gst_input_selector_get_linked_pad (sel, pad, TRUE);
436 g_value_init (&val, GST_TYPE_PAD);
437 g_value_set_object (&val, otherpad);
438 it = gst_iterator_new_single (GST_TYPE_PAD, &val);
439 g_value_unset (&val);
440 gst_object_unref (otherpad);
447 gst_selector_pad_event (GstPad * pad, GstObject * parent, GstEvent * event)
451 GstInputSelector *sel;
452 GstSelectorPad *selpad;
453 GstPad *prev_active_sinkpad;
454 GstPad *active_sinkpad;
456 sel = GST_INPUT_SELECTOR (parent);
457 selpad = GST_SELECTOR_PAD_CAST (pad);
458 GST_DEBUG_OBJECT (selpad, "received event %" GST_PTR_FORMAT, event);
460 GST_INPUT_SELECTOR_LOCK (sel);
461 prev_active_sinkpad = sel->active_sinkpad;
462 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
463 GST_INPUT_SELECTOR_UNLOCK (sel);
465 if (prev_active_sinkpad != active_sinkpad && pad == active_sinkpad) {
466 g_object_notify (G_OBJECT (sel), "active-pad");
469 GST_INPUT_SELECTOR_LOCK (sel);
470 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
472 /* only forward if we are dealing with the active sinkpad */
473 forward = (pad == active_sinkpad);
475 switch (GST_EVENT_TYPE (event)) {
476 case GST_EVENT_FLUSH_START:
477 /* Unblock the pad if it's waiting */
478 selpad->flushing = TRUE;
479 GST_INPUT_SELECTOR_BROADCAST (sel);
481 case GST_EVENT_FLUSH_STOP:
482 gst_selector_pad_reset (selpad);
484 case GST_EVENT_SEGMENT:
486 gst_event_copy_segment (event, &selpad->segment);
487 selpad->segment_seqnum = gst_event_get_seqnum (event);
489 /* Update the position */
490 if (selpad->position == GST_CLOCK_TIME_NONE
491 || selpad->segment.position > selpad->position) {
492 selpad->position = selpad->segment.position;
493 } else if (selpad->position != GST_CLOCK_TIME_NONE
494 && selpad->position > selpad->segment.position) {
495 selpad->segment.position = selpad->position;
498 gst_event_unref (event);
499 event = gst_event_new_segment (&selpad->segment);
500 gst_event_set_seqnum (event, selpad->segment_seqnum);
503 GST_DEBUG_OBJECT (pad, "configured SEGMENT %" GST_SEGMENT_FORMAT,
509 GstTagList *tags, *oldtags, *newtags;
511 gst_event_parse_tag (event, &tags);
513 oldtags = selpad->tags;
515 newtags = gst_tag_list_merge (oldtags, tags, GST_TAG_MERGE_REPLACE);
516 selpad->tags = newtags;
518 gst_tag_list_unref (oldtags);
519 GST_DEBUG_OBJECT (pad, "received tags %" GST_PTR_FORMAT, newtags);
521 g_object_notify (G_OBJECT (selpad), "tags");
528 selpad->eos_sent = TRUE;
530 GstSelectorPad *active_selpad;
532 /* If the active sinkpad is in EOS state but EOS
533 * was not sent downstream this means that the pad
534 * got EOS before it was set as active pad and that
535 * the previously active pad got EOS after it was
538 active_selpad = GST_SELECTOR_PAD (active_sinkpad);
539 forward = (active_selpad->eos && !active_selpad->eos_sent);
540 active_selpad->eos_sent = TRUE;
542 GST_DEBUG_OBJECT (pad, "received EOS");
547 GST_INPUT_SELECTOR_UNLOCK (sel);
549 GST_DEBUG_OBJECT (pad, "forwarding event");
550 res = gst_pad_push_event (sel->srcpad, event);
552 /* If we aren't forwarding the event because the pad is not the
553 * active_sinkpad, then set the flag on the pad
554 * that says a segment needs sending if/when that pad is activated.
555 * For all other cases, we send the event immediately, which makes
556 * sparse streams and other segment updates work correctly downstream.
558 if (GST_EVENT_IS_STICKY (event))
559 selpad->events_pending = TRUE;
560 gst_event_unref (event);
567 gst_selector_pad_query (GstPad * pad, GstObject * parent, GstQuery * query)
569 gboolean res = FALSE;
571 switch (GST_QUERY_TYPE (query)) {
573 res = gst_pad_query_default (pad, parent, query);
580 /* must be called with the SELECTOR_LOCK, will block while the pad is blocked
581 * or return TRUE when flushing */
583 gst_input_selector_wait (GstInputSelector * self, GstSelectorPad * pad)
585 while (self->blocked && !self->flushing && !pad->flushing) {
586 /* we can be unlocked here when we are shutting down (flushing) or when we
588 GST_INPUT_SELECTOR_WAIT (self);
590 return self->flushing;
593 /* must be called without the SELECTOR_LOCK, will wait until the running time
594 * of the active pad is after this pad or return TRUE when flushing */
596 gst_input_selector_wait_running_time (GstInputSelector * sel,
597 GstSelectorPad * selpad, GstBuffer * buf)
601 GST_DEBUG_OBJECT (selpad, "entering wait for buffer %p", buf);
603 /* If we have no valid timestamp we can't sync this buffer */
604 if (!GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
605 GST_DEBUG_OBJECT (selpad, "leaving wait for buffer with "
606 "invalid timestamp");
610 seg = &selpad->segment;
613 * a) this is the active pad
614 * b) the pad or the selector is flushing
615 * c) the selector is not blocked
616 * d) the buffer running time is before the current running time
617 * (either active-seg or clock, depending on sync-mode)
620 GST_INPUT_SELECTOR_LOCK (sel);
622 GstPad *active_sinkpad;
623 GstSelectorPad *active_selpad;
625 gint64 cur_running_time;
626 GstClockTime running_time;
629 gst_input_selector_activate_sinkpad (sel, GST_PAD_CAST (selpad));
630 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
632 running_time = GST_BUFFER_TIMESTAMP (buf);
633 /* If possible try to get the running time at the end of the buffer */
634 if (GST_BUFFER_DURATION_IS_VALID (buf))
635 running_time += GST_BUFFER_DURATION (buf);
636 /* Only use the segment to convert to running time if the segment is
637 * in TIME format, otherwise do our best to try to sync */
638 if (seg->format == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (seg->stop)) {
639 if (running_time > seg->stop) {
640 running_time = seg->stop;
643 gst_segment_to_running_time (seg, GST_FORMAT_TIME, running_time);
644 /* If this is outside the segment don't sync */
645 if (running_time == -1) {
646 GST_INPUT_SELECTOR_UNLOCK (sel);
651 cur_running_time = GST_CLOCK_TIME_NONE;
652 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
653 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
655 GstClockTime base_time;
657 cur_running_time = gst_clock_get_time (clock);
658 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
659 if (base_time <= cur_running_time)
660 cur_running_time -= base_time;
662 cur_running_time = 0;
665 GstSegment *active_seg;
667 active_seg = &active_selpad->segment;
669 /* Get active pad's running time, if no configured segment yet keep at -1 */
670 if (active_seg->format == GST_FORMAT_TIME)
671 cur_running_time = gst_segment_to_running_time (active_seg,
672 GST_FORMAT_TIME, active_seg->position);
675 if (selpad != active_selpad && !sel->flushing && !selpad->flushing &&
676 (sel->cache_buffers || active_selpad->pushed) &&
677 (sel->blocked || cur_running_time == -1
678 || running_time >= cur_running_time)) {
680 GST_DEBUG_OBJECT (selpad,
681 "Waiting for active streams to advance. %" GST_TIME_FORMAT " >= %"
682 GST_TIME_FORMAT, GST_TIME_ARGS (running_time),
683 GST_TIME_ARGS (cur_running_time));
685 GST_INPUT_SELECTOR_WAIT (sel);
687 GST_INPUT_SELECTOR_UNLOCK (sel);
692 /* Return TRUE if the selector or the pad is flushing */
693 return (sel->flushing || selpad->flushing);
697 forward_sticky_events (GstPad * sinkpad, GstEvent ** event, gpointer user_data)
699 GstInputSelector *sel = GST_INPUT_SELECTOR (user_data);
701 if (GST_EVENT_TYPE (*event) == GST_EVENT_SEGMENT) {
702 GstSegment *seg = &GST_SELECTOR_PAD (sinkpad)->segment;
705 e = gst_event_new_segment (seg);
706 gst_event_set_seqnum (e, GST_SELECTOR_PAD_CAST (sinkpad)->segment_seqnum);
708 gst_pad_push_event (sel->srcpad, e);
710 gst_pad_push_event (sel->srcpad, gst_event_ref (*event));
716 #if DEBUG_CACHED_BUFFERS
718 gst_input_selector_debug_cached_buffers (GstInputSelector * sel)
722 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
723 GstSelectorPad *selpad;
728 selpad = GST_SELECTOR_PAD_CAST (walk->data);
729 if (!selpad->cached_buffers) {
730 GST_DEBUG_OBJECT (selpad, "Cached buffers timestamps: <none>");
734 timestamps = g_string_new ("Cached buffers timestamps:");
735 for (i = 0; i < selpad->cached_buffers->length; ++i) {
736 GstSelectorPadCachedBuffer *cached_buffer;
738 cached_buffer = g_queue_peek_nth (selpad->cached_buffers, i);
739 g_string_append_printf (timestamps, " %" GST_TIME_FORMAT,
740 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (cached_buffer->buffer)));
742 str = g_string_free (timestamps, FALSE);
743 GST_DEBUG_OBJECT (selpad, str);
749 /* must be called with the SELECTOR_LOCK */
751 gst_input_selector_cleanup_old_cached_buffers (GstInputSelector * sel,
754 GstSelectorPad *selpad;
757 gint64 cur_running_time;
760 selpad = GST_SELECTOR_PAD_CAST (pad);
761 seg = &selpad->segment;
763 cur_running_time = GST_CLOCK_TIME_NONE;
764 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
765 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
767 GstClockTime base_time;
769 cur_running_time = gst_clock_get_time (clock);
770 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
771 if (base_time <= cur_running_time)
772 cur_running_time -= base_time;
774 cur_running_time = 0;
777 GstPad *active_sinkpad;
778 GstSelectorPad *active_selpad;
779 GstSegment *active_seg;
781 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
782 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
783 active_seg = &active_selpad->segment;
785 /* Get active pad's running time, if no configured segment yet keep at -1 */
786 if (active_seg->format == GST_FORMAT_TIME)
787 cur_running_time = gst_segment_to_running_time (active_seg,
788 GST_FORMAT_TIME, active_seg->position);
791 if (!GST_CLOCK_TIME_IS_VALID (cur_running_time))
794 GST_DEBUG_OBJECT (sel, "Cleaning up old cached buffers");
795 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
796 GstSelectorPad *selpad = GST_SELECTOR_PAD_CAST (walk->data);
797 GstSelectorPadCachedBuffer *cached_buffer;
798 GSList *maybe_remove;
799 guint queue_position;
801 if (!selpad->cached_buffers)
806 while ((cached_buffer = g_queue_peek_nth (selpad->cached_buffers,
808 GstBuffer *buffer = cached_buffer->buffer;
809 GstClockTime running_time;
812 /* If we have no valid timestamp we can't sync this buffer */
813 if (!GST_BUFFER_TIMESTAMP_IS_VALID (buffer)) {
814 maybe_remove = g_slist_append (maybe_remove, cached_buffer);
815 queue_position = g_slist_length (maybe_remove);
819 /* the buffer is still valid if its duration is valid and the
820 * timestamp + duration is >= time, or if its duration is invalid
821 * and the timestamp is >= time */
822 running_time = GST_BUFFER_TIMESTAMP (buffer);
823 /* If possible try to get the running time at the end of the buffer */
824 if (GST_BUFFER_DURATION_IS_VALID (buffer))
825 running_time += GST_BUFFER_DURATION (buffer);
826 /* Only use the segment to convert to running time if the segment is
827 * in TIME format, otherwise do our best to try to sync */
828 if (seg->format == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (seg->stop)) {
829 if (running_time > seg->stop) {
830 running_time = seg->stop;
833 gst_segment_to_running_time (seg, GST_FORMAT_TIME, running_time);
836 GST_DEBUG_OBJECT (selpad,
837 "checking if buffer %p running time=%" GST_TIME_FORMAT
838 " >= stream time=%" GST_TIME_FORMAT, buffer,
839 GST_TIME_ARGS (running_time), GST_TIME_ARGS (cur_running_time));
840 if (running_time >= cur_running_time) {
844 GST_DEBUG_OBJECT (selpad, "Removing old cached buffer %p", buffer);
845 g_queue_pop_nth (selpad->cached_buffers, queue_position);
846 gst_selector_pad_free_cached_buffer (cached_buffer);
848 for (l = maybe_remove; l != NULL; l = g_slist_next (l)) {
849 /* A buffer after some invalid buffers was removed, it means the invalid buffers
850 * are old, lets also remove them */
851 cached_buffer = l->data;
852 g_queue_remove (selpad->cached_buffers, cached_buffer);
853 gst_selector_pad_free_cached_buffer (cached_buffer);
856 g_slist_free (maybe_remove);
861 g_slist_free (maybe_remove);
864 if (g_queue_is_empty (selpad->cached_buffers)) {
865 g_queue_free (selpad->cached_buffers);
866 selpad->cached_buffers = NULL;
870 #if DEBUG_CACHED_BUFFERS
871 gst_input_selector_debug_cached_buffers (sel);
876 gst_selector_pad_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
878 GstInputSelector *sel;
880 GstPad *active_sinkpad;
881 GstPad *prev_active_sinkpad;
882 GstSelectorPad *selpad;
883 GstClockTime start_time;
885 sel = GST_INPUT_SELECTOR (parent);
886 selpad = GST_SELECTOR_PAD_CAST (pad);
888 GST_DEBUG_OBJECT (selpad,
889 "entering chain for buf %p with timestamp %" GST_TIME_FORMAT, buf,
890 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
892 GST_INPUT_SELECTOR_LOCK (sel);
893 /* wait or check for flushing */
894 if (gst_input_selector_wait (sel, selpad)) {
895 GST_INPUT_SELECTOR_UNLOCK (sel);
899 GST_LOG_OBJECT (pad, "getting active pad");
901 prev_active_sinkpad = sel->active_sinkpad;
902 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
904 /* In sync mode wait until the active pad has advanced
905 * after the running time of the current buffer */
906 if (sel->sync_streams) {
907 /* call chain for each cached buffer if we are not the active pad
908 * or if we are the active pad but didn't push anything yet. */
909 if (active_sinkpad != pad || !selpad->pushed) {
910 /* no need to check for sel->cache_buffers as selpad->cached_buffers
911 * will only be valid if cache_buffers is TRUE */
912 if (selpad->cached_buffers && !selpad->sending_cached_buffers) {
913 GstSelectorPadCachedBuffer *cached_buffer;
914 GstSegment saved_segment;
916 saved_segment = selpad->segment;
918 selpad->sending_cached_buffers = TRUE;
919 while (!sel->flushing && !selpad->flushing &&
920 (cached_buffer = g_queue_pop_head (selpad->cached_buffers))) {
921 GST_DEBUG_OBJECT (pad, "Cached buffers found, "
922 "invoking chain for cached buffer %p", cached_buffer->buffer);
924 selpad->segment = cached_buffer->segment;
925 selpad->events_pending = TRUE;
926 GST_INPUT_SELECTOR_UNLOCK (sel);
927 gst_selector_pad_chain (pad, parent, cached_buffer->buffer);
928 GST_INPUT_SELECTOR_LOCK (sel);
930 /* we may have cleaned up the queue in the meantime because of
932 if (!selpad->cached_buffers) {
936 selpad->sending_cached_buffers = FALSE;
938 /* all cached buffers sent, restore segment for current buffer */
939 selpad->segment = saved_segment;
940 selpad->events_pending = TRUE;
942 /* Might have changed while calling chain for cached buffers */
943 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
947 if (active_sinkpad != pad) {
948 GST_INPUT_SELECTOR_UNLOCK (sel);
949 if (gst_input_selector_wait_running_time (sel, selpad, buf))
951 GST_INPUT_SELECTOR_LOCK (sel);
954 /* Might have changed while waiting */
955 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
958 /* update the segment on the srcpad */
959 start_time = GST_BUFFER_TIMESTAMP (buf);
960 if (GST_CLOCK_TIME_IS_VALID (start_time)) {
961 GST_LOG_OBJECT (pad, "received start time %" GST_TIME_FORMAT,
962 GST_TIME_ARGS (start_time));
963 if (GST_BUFFER_DURATION_IS_VALID (buf))
964 GST_LOG_OBJECT (pad, "received end time %" GST_TIME_FORMAT,
965 GST_TIME_ARGS (start_time + GST_BUFFER_DURATION (buf)));
967 GST_OBJECT_LOCK (pad);
968 selpad->position = start_time;
969 selpad->segment.position = start_time;
970 GST_OBJECT_UNLOCK (pad);
973 /* Ignore buffers from pads except the selected one */
974 if (pad != active_sinkpad)
977 /* Tell all non-active pads that we advanced the running time */
978 if (sel->sync_streams)
979 GST_INPUT_SELECTOR_BROADCAST (sel);
981 GST_INPUT_SELECTOR_UNLOCK (sel);
983 if (prev_active_sinkpad != active_sinkpad && pad == active_sinkpad) {
984 g_object_notify (G_OBJECT (sel), "active-pad");
987 /* if we have a pending events, push them now */
988 if (G_UNLIKELY (prev_active_sinkpad != active_sinkpad
989 || selpad->events_pending)) {
990 gst_pad_sticky_events_foreach (GST_PAD_CAST (selpad), forward_sticky_events,
992 selpad->events_pending = FALSE;
995 if (selpad->discont) {
996 buf = gst_buffer_make_writable (buf);
998 GST_DEBUG_OBJECT (pad, "Marking discont buffer %p", buf);
999 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
1000 selpad->discont = FALSE;
1004 GST_LOG_OBJECT (pad, "Forwarding buffer %p with timestamp %" GST_TIME_FORMAT,
1005 buf, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
1007 res = gst_pad_push (sel->srcpad, gst_buffer_ref (buf));
1008 GST_LOG_OBJECT (pad, "Buffer %p forwarded result=%d", buf, res);
1010 GST_INPUT_SELECTOR_LOCK (sel);
1012 if (sel->sync_streams && sel->cache_buffers) {
1013 /* Might have changed while pushing */
1014 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
1015 /* only set pad to pushed if we are still the active pad */
1016 if (active_sinkpad == pad)
1017 selpad->pushed = TRUE;
1019 /* cache buffer as we may need it again if we change pads */
1020 gst_selector_pad_cache_buffer (selpad, buf);
1021 gst_input_selector_cleanup_old_cached_buffers (sel, pad);
1023 selpad->pushed = TRUE;
1024 gst_buffer_unref (buf);
1026 GST_INPUT_SELECTOR_UNLOCK (sel);
1031 /* dropped buffers */
1034 gboolean active_pad_pushed = GST_SELECTOR_PAD_CAST (active_sinkpad)->pushed;
1036 GST_DEBUG_OBJECT (pad, "Pad not active or buffer timestamp is invalid, "
1037 "discard buffer %p", buf);
1038 /* when we drop a buffer, we're creating a discont on this pad */
1039 selpad->discont = TRUE;
1040 GST_INPUT_SELECTOR_UNLOCK (sel);
1041 gst_buffer_unref (buf);
1043 /* figure out what to return upstream */
1044 GST_OBJECT_LOCK (selpad);
1045 if (selpad->always_ok || !active_pad_pushed)
1048 res = GST_FLOW_NOT_LINKED;
1049 GST_OBJECT_UNLOCK (selpad);
1055 GST_DEBUG_OBJECT (pad, "We are flushing, discard buffer %p", buf);
1056 gst_buffer_unref (buf);
1057 res = GST_FLOW_FLUSHING;
1062 static void gst_input_selector_dispose (GObject * object);
1063 static void gst_input_selector_finalize (GObject * object);
1065 static void gst_input_selector_set_property (GObject * object,
1066 guint prop_id, const GValue * value, GParamSpec * pspec);
1067 static void gst_input_selector_get_property (GObject * object,
1068 guint prop_id, GValue * value, GParamSpec * pspec);
1070 static GstPad *gst_input_selector_request_new_pad (GstElement * element,
1071 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps);
1072 static void gst_input_selector_release_pad (GstElement * element, GstPad * pad);
1074 static GstStateChangeReturn gst_input_selector_change_state (GstElement *
1075 element, GstStateChange transition);
1077 static gboolean gst_input_selector_event (GstPad * pad, GstObject * parent,
1079 static gboolean gst_input_selector_query (GstPad * pad, GstObject * parent,
1081 static gint64 gst_input_selector_block (GstInputSelector * self);
1083 /* FIXME: create these marshallers using glib-genmarshal */
1085 gst_input_selector_marshal_INT64__VOID (GClosure * closure,
1086 GValue * return_value G_GNUC_UNUSED,
1087 guint n_param_values,
1088 const GValue * param_values,
1089 gpointer invocation_hint G_GNUC_UNUSED, gpointer marshal_data)
1091 typedef gint64 (*GMarshalFunc_INT64__VOID) (gpointer data1, gpointer data2);
1092 register GMarshalFunc_INT64__VOID callback;
1093 register GCClosure *cc = (GCClosure *) closure;
1094 register gpointer data1, data2;
1097 g_return_if_fail (return_value != NULL);
1098 g_return_if_fail (n_param_values == 1);
1100 if (G_CCLOSURE_SWAP_DATA (closure)) {
1101 data1 = closure->data;
1102 data2 = g_value_peek_pointer (param_values + 0);
1104 data1 = g_value_peek_pointer (param_values + 0);
1105 data2 = closure->data;
1108 (GMarshalFunc_INT64__VOID) (marshal_data ? marshal_data : cc->callback);
1110 v_return = callback (data1, data2);
1112 g_value_set_int64 (return_value, v_return);
1116 GST_DEBUG_CATEGORY_INIT (input_selector_debug, \
1117 "input-selector", 0, "An input stream selector element");
1118 #define gst_input_selector_parent_class parent_class
1119 G_DEFINE_TYPE_WITH_CODE (GstInputSelector, gst_input_selector, GST_TYPE_ELEMENT,
1123 gst_input_selector_class_init (GstInputSelectorClass * klass)
1125 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
1126 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
1128 gobject_class->dispose = gst_input_selector_dispose;
1129 gobject_class->finalize = gst_input_selector_finalize;
1131 gobject_class->set_property = gst_input_selector_set_property;
1132 gobject_class->get_property = gst_input_selector_get_property;
1134 g_object_class_install_property (gobject_class, PROP_N_PADS,
1135 g_param_spec_uint ("n-pads", "Number of Pads",
1136 "The number of sink pads", 0, G_MAXUINT, 0,
1137 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
1139 g_object_class_install_property (gobject_class, PROP_ACTIVE_PAD,
1140 g_param_spec_object ("active-pad", "Active pad",
1141 "The currently active sink pad", GST_TYPE_PAD,
1142 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
1145 * GstInputSelector:sync-streams
1147 * If set to %TRUE all inactive streams will be synced to the
1148 * running time of the active stream or to the current clock.
1150 * To make sure no buffers are dropped by input-selector
1151 * that might be needed when switching the active pad,
1152 * sync-mode should be set to "clock" and cache-buffers to TRUE.
1156 g_object_class_install_property (gobject_class, PROP_SYNC_STREAMS,
1157 g_param_spec_boolean ("sync-streams", "Sync Streams",
1158 "Synchronize inactive streams to the running time of the active "
1159 "stream or to the current clock",
1160 DEFAULT_SYNC_STREAMS,
1161 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1162 GST_PARAM_MUTABLE_READY));
1165 * GstInputSelector:sync-mode
1167 * Select how input-selector will sync buffers when in sync-streams mode.
1169 * Note that when using the "active-segment" mode, the "active-segment" may
1170 * be ahead of current clock time when switching the active pad, as the current
1171 * active pad may have pushed more buffers than what was displayed/consumed,
1172 * which may cause delays and some missing buffers.
1176 g_object_class_install_property (gobject_class, PROP_SYNC_MODE,
1177 g_param_spec_enum ("sync-mode", "Sync mode",
1178 "Behavior in sync-streams mode", GST_TYPE_INPUT_SELECTOR_SYNC_MODE,
1180 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1181 GST_PARAM_MUTABLE_READY));
1184 * GstInputSelector:cache-buffers
1186 * If set to %TRUE and GstInputSelector:sync-streams is also set to %TRUE,
1187 * the active pad will cache the buffers still considered valid (after current
1188 * running time, see sync-mode) to avoid missing frames if/when the pad is
1191 * The active pad may push more buffers than what is currently displayed/consumed
1192 * and when changing pads those buffers will be discarded and the only way to
1193 * reactivate that pad without loosing the already consumed buffers is to enable cache.
1195 g_object_class_install_property (gobject_class, PROP_CACHE_BUFFERS,
1196 g_param_spec_boolean ("cache-buffers", "Cache Buffers",
1197 "Cache buffers for active-pad",
1198 DEFAULT_CACHE_BUFFERS,
1199 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1200 GST_PARAM_MUTABLE_READY));
1203 * GstInputSelector::block:
1204 * @inputselector: the #GstInputSelector
1206 * Block all sink pads in preparation for a switch. Returns the stop time of
1207 * the current switch segment, as a running time, or 0 if there is no current
1208 * active pad or the current active pad never received data.
1210 gst_input_selector_signals[SIGNAL_BLOCK] =
1211 g_signal_new ("block", G_TYPE_FROM_CLASS (klass),
1212 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1213 G_STRUCT_OFFSET (GstInputSelectorClass, block), NULL, NULL,
1214 gst_input_selector_marshal_INT64__VOID, G_TYPE_INT64, 0);
1216 gst_element_class_set_static_metadata (gstelement_class, "Input selector",
1217 "Generic", "N-to-1 input stream selector",
1218 "Julien Moutte <julien@moutte.net>, "
1219 "Jan Schmidt <thaytan@mad.scientist.com>, "
1220 "Wim Taymans <wim.taymans@gmail.com>");
1221 gst_element_class_add_pad_template (gstelement_class,
1222 gst_static_pad_template_get (&gst_input_selector_sink_factory));
1223 gst_element_class_add_pad_template (gstelement_class,
1224 gst_static_pad_template_get (&gst_input_selector_src_factory));
1226 gstelement_class->request_new_pad = gst_input_selector_request_new_pad;
1227 gstelement_class->release_pad = gst_input_selector_release_pad;
1228 gstelement_class->change_state = gst_input_selector_change_state;
1230 klass->block = GST_DEBUG_FUNCPTR (gst_input_selector_block);
1234 gst_input_selector_init (GstInputSelector * sel)
1236 sel->srcpad = gst_pad_new ("src", GST_PAD_SRC);
1237 gst_pad_set_iterate_internal_links_function (sel->srcpad,
1238 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1239 gst_pad_set_query_function (sel->srcpad,
1240 GST_DEBUG_FUNCPTR (gst_input_selector_query));
1241 gst_pad_set_event_function (sel->srcpad,
1242 GST_DEBUG_FUNCPTR (gst_input_selector_event));
1243 GST_OBJECT_FLAG_SET (sel->srcpad, GST_PAD_FLAG_PROXY_CAPS);
1244 gst_element_add_pad (GST_ELEMENT (sel), sel->srcpad);
1245 /* sinkpad management */
1246 sel->active_sinkpad = NULL;
1248 sel->sync_streams = DEFAULT_SYNC_STREAMS;
1250 g_mutex_init (&sel->lock);
1251 g_cond_init (&sel->cond);
1252 sel->blocked = FALSE;
1254 /* lets give a change for downstream to do something on
1255 * active-pad change before we start pushing new buffers */
1256 g_signal_connect_data (sel, "notify::active-pad",
1257 (GCallback) gst_input_selector_active_pad_changed, NULL,
1258 NULL, G_CONNECT_AFTER);
1262 gst_input_selector_dispose (GObject * object)
1264 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1266 if (sel->active_sinkpad) {
1267 gst_object_unref (sel->active_sinkpad);
1268 sel->active_sinkpad = NULL;
1270 G_OBJECT_CLASS (parent_class)->dispose (object);
1274 gst_input_selector_finalize (GObject * object)
1276 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1278 g_mutex_clear (&sel->lock);
1279 g_cond_clear (&sel->cond);
1281 G_OBJECT_CLASS (parent_class)->finalize (object);
1284 /* this function must be called with the SELECTOR_LOCK. It returns TRUE when the
1285 * active pad changed. */
1287 gst_input_selector_set_active_pad (GstInputSelector * self, GstPad * pad)
1289 GstSelectorPad *old, *new;
1290 GstPad **active_pad_p;
1292 if (pad == self->active_sinkpad)
1295 old = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
1296 new = GST_SELECTOR_PAD_CAST (pad);
1298 GST_DEBUG_OBJECT (self, "setting active pad to %s:%s",
1299 GST_DEBUG_PAD_NAME (new));
1302 old->pushed = FALSE;
1304 new->pushed = FALSE;
1306 /* Send a new SEGMENT event on the new pad next */
1307 if (old != new && new)
1308 new->events_pending = TRUE;
1310 active_pad_p = &self->active_sinkpad;
1311 gst_object_replace ((GstObject **) active_pad_p, GST_OBJECT_CAST (pad));
1313 GST_DEBUG_OBJECT (self, "New active pad is %" GST_PTR_FORMAT,
1314 self->active_sinkpad);
1320 gst_input_selector_set_property (GObject * object, guint prop_id,
1321 const GValue * value, GParamSpec * pspec)
1323 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1326 case PROP_ACTIVE_PAD:
1330 pad = g_value_get_object (value);
1332 GST_INPUT_SELECTOR_LOCK (sel);
1334 #if DEBUG_CACHED_BUFFERS
1335 gst_input_selector_debug_cached_buffers (sel);
1338 gst_input_selector_set_active_pad (sel, pad);
1340 #if DEBUG_CACHED_BUFFERS
1341 gst_input_selector_debug_cached_buffers (sel);
1344 GST_INPUT_SELECTOR_UNLOCK (sel);
1347 case PROP_SYNC_STREAMS:
1348 GST_INPUT_SELECTOR_LOCK (sel);
1349 sel->sync_streams = g_value_get_boolean (value);
1350 GST_INPUT_SELECTOR_UNLOCK (sel);
1352 case PROP_SYNC_MODE:
1353 GST_INPUT_SELECTOR_LOCK (sel);
1354 sel->sync_mode = g_value_get_enum (value);
1355 GST_INPUT_SELECTOR_UNLOCK (sel);
1357 case PROP_CACHE_BUFFERS:
1358 GST_INPUT_SELECTOR_LOCK (object);
1359 sel->cache_buffers = g_value_get_boolean (value);
1360 GST_INPUT_SELECTOR_UNLOCK (object);
1363 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1369 gst_input_selector_active_pad_changed (GstInputSelector * sel,
1370 GParamSpec * pspec, gpointer user_data)
1372 /* Wake up all non-active pads in sync mode, they might be
1373 * the active pad now */
1374 if (sel->sync_streams)
1375 GST_INPUT_SELECTOR_BROADCAST (sel);
1379 gst_input_selector_get_property (GObject * object, guint prop_id,
1380 GValue * value, GParamSpec * pspec)
1382 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1386 GST_INPUT_SELECTOR_LOCK (object);
1387 g_value_set_uint (value, sel->n_pads);
1388 GST_INPUT_SELECTOR_UNLOCK (object);
1390 case PROP_ACTIVE_PAD:
1391 GST_INPUT_SELECTOR_LOCK (object);
1392 g_value_set_object (value, sel->active_sinkpad);
1393 GST_INPUT_SELECTOR_UNLOCK (object);
1395 case PROP_SYNC_STREAMS:
1396 GST_INPUT_SELECTOR_LOCK (object);
1397 g_value_set_boolean (value, sel->sync_streams);
1398 GST_INPUT_SELECTOR_UNLOCK (object);
1400 case PROP_SYNC_MODE:
1401 GST_INPUT_SELECTOR_LOCK (object);
1402 g_value_set_enum (value, sel->sync_mode);
1403 GST_INPUT_SELECTOR_UNLOCK (object);
1405 case PROP_CACHE_BUFFERS:
1406 GST_INPUT_SELECTOR_LOCK (object);
1407 g_value_set_boolean (value, sel->cache_buffers);
1408 GST_INPUT_SELECTOR_UNLOCK (object);
1411 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1417 gst_input_selector_get_linked_pad (GstInputSelector * sel, GstPad * pad,
1420 GstPad *otherpad = NULL;
1422 GST_INPUT_SELECTOR_LOCK (sel);
1423 if (pad == sel->srcpad)
1424 otherpad = sel->active_sinkpad;
1425 else if (pad == sel->active_sinkpad || !strict)
1426 otherpad = sel->srcpad;
1428 gst_object_ref (otherpad);
1429 GST_INPUT_SELECTOR_UNLOCK (sel);
1435 gst_input_selector_event (GstPad * pad, GstObject * parent, GstEvent * event)
1437 GstInputSelector *sel;
1438 gboolean result = FALSE;
1440 gboolean done = FALSE;
1441 GValue item = { 0, };
1443 GList *pushed_pads = NULL;
1445 sel = GST_INPUT_SELECTOR (parent);
1446 /* Send upstream events to all sinkpads */
1447 iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1449 /* This is now essentially a copy of gst_pad_event_default_dispatch
1450 * with a different iterator */
1452 switch (gst_iterator_next (iter, &item)) {
1453 case GST_ITERATOR_OK:
1454 eventpad = g_value_get_object (&item);
1456 /* if already pushed, skip */
1457 if (g_list_find (pushed_pads, eventpad)) {
1458 g_value_reset (&item);
1462 gst_event_ref (event);
1463 result |= gst_pad_push_event (eventpad, event);
1465 g_value_reset (&item);
1467 case GST_ITERATOR_RESYNC:
1468 /* We don't reset the result here because we don't push the event
1469 * again on pads that got the event already and because we need
1470 * to consider the result of the previous pushes */
1471 gst_iterator_resync (iter);
1473 case GST_ITERATOR_ERROR:
1474 GST_ERROR_OBJECT (pad, "Could not iterate over sinkpads");
1477 case GST_ITERATOR_DONE:
1482 g_value_unset (&item);
1483 gst_iterator_free (iter);
1485 g_list_free (pushed_pads);
1487 gst_event_unref (event);
1492 /* query on the srcpad. We override this function because by default it will
1493 * only forward the query to one random sinkpad */
1495 gst_input_selector_query (GstPad * pad, GstObject * parent, GstQuery * query)
1497 gboolean res = FALSE;
1498 GstInputSelector *sel;
1500 sel = GST_INPUT_SELECTOR (parent);
1502 switch (GST_QUERY_TYPE (query)) {
1503 case GST_QUERY_LATENCY:
1506 GstClockTime resmin, resmax;
1513 /* perform the query on all sinkpads and combine the results. We take the
1514 * max of min and the min of max for the result latency. */
1515 GST_INPUT_SELECTOR_LOCK (sel);
1516 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk;
1517 walk = g_list_next (walk)) {
1518 GstPad *sinkpad = GST_PAD_CAST (walk->data);
1520 if (gst_pad_peer_query (sinkpad, query)) {
1521 GstClockTime min, max;
1524 /* one query succeeded, we succeed too */
1527 gst_query_parse_latency (query, &live, &min, &max);
1529 GST_DEBUG_OBJECT (sinkpad,
1530 "peer latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
1531 ", live %d", GST_TIME_ARGS (min), GST_TIME_ARGS (max), live);
1538 else if (max < resmax)
1540 if (reslive == FALSE)
1545 GST_INPUT_SELECTOR_UNLOCK (sel);
1547 gst_query_set_latency (query, reslive, resmin, resmax);
1549 GST_DEBUG_OBJECT (sel,
1550 "total latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
1551 ", live %d", GST_TIME_ARGS (resmin), GST_TIME_ARGS (resmax),
1558 res = gst_pad_query_default (pad, parent, query);
1565 /* check if the pad is the active sinkpad */
1566 static inline gboolean
1567 gst_input_selector_is_active_sinkpad (GstInputSelector * sel, GstPad * pad)
1571 GST_INPUT_SELECTOR_LOCK (sel);
1572 res = (pad == sel->active_sinkpad);
1573 GST_INPUT_SELECTOR_UNLOCK (sel);
1578 /* Get or create the active sinkpad, must be called with SELECTOR_LOCK */
1580 gst_input_selector_activate_sinkpad (GstInputSelector * sel, GstPad * pad)
1582 GstPad *active_sinkpad;
1583 GstSelectorPad *selpad;
1585 selpad = GST_SELECTOR_PAD_CAST (pad);
1587 selpad->active = TRUE;
1588 active_sinkpad = sel->active_sinkpad;
1589 if (active_sinkpad == NULL) {
1590 /* first pad we get activity on becomes the activated pad by default */
1591 if (sel->active_sinkpad)
1592 gst_object_unref (sel->active_sinkpad);
1593 active_sinkpad = sel->active_sinkpad = gst_object_ref (pad);
1594 GST_DEBUG_OBJECT (sel, "Activating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1597 return active_sinkpad;
1601 gst_input_selector_request_new_pad (GstElement * element,
1602 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps)
1604 GstInputSelector *sel;
1606 GstPad *sinkpad = NULL;
1608 g_return_val_if_fail (templ->direction == GST_PAD_SINK, NULL);
1610 sel = GST_INPUT_SELECTOR (element);
1612 GST_INPUT_SELECTOR_LOCK (sel);
1614 GST_LOG_OBJECT (sel, "Creating new pad %d", sel->padcount);
1615 name = g_strdup_printf ("sink_%u", sel->padcount++);
1616 sinkpad = g_object_new (GST_TYPE_SELECTOR_PAD,
1617 "name", name, "direction", templ->direction, "template", templ, NULL);
1622 gst_pad_set_event_function (sinkpad,
1623 GST_DEBUG_FUNCPTR (gst_selector_pad_event));
1624 gst_pad_set_query_function (sinkpad,
1625 GST_DEBUG_FUNCPTR (gst_selector_pad_query));
1626 gst_pad_set_chain_function (sinkpad,
1627 GST_DEBUG_FUNCPTR (gst_selector_pad_chain));
1628 gst_pad_set_iterate_internal_links_function (sinkpad,
1629 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1631 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_CAPS);
1632 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_ALLOCATION);
1633 gst_pad_set_active (sinkpad, TRUE);
1634 gst_element_add_pad (GST_ELEMENT (sel), sinkpad);
1635 GST_INPUT_SELECTOR_UNLOCK (sel);
1641 gst_input_selector_release_pad (GstElement * element, GstPad * pad)
1643 GstInputSelector *sel;
1645 sel = GST_INPUT_SELECTOR (element);
1646 GST_LOG_OBJECT (sel, "Releasing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1648 GST_INPUT_SELECTOR_LOCK (sel);
1649 /* if the pad was the active pad, makes us select a new one */
1650 if (sel->active_sinkpad == pad) {
1651 GST_DEBUG_OBJECT (sel, "Deactivating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1652 gst_object_unref (sel->active_sinkpad);
1653 sel->active_sinkpad = NULL;
1657 gst_pad_set_active (pad, FALSE);
1658 gst_element_remove_pad (GST_ELEMENT (sel), pad);
1659 GST_INPUT_SELECTOR_UNLOCK (sel);
1663 gst_input_selector_reset (GstInputSelector * sel)
1667 GST_INPUT_SELECTOR_LOCK (sel);
1668 /* clear active pad */
1669 if (sel->active_sinkpad) {
1670 gst_object_unref (sel->active_sinkpad);
1671 sel->active_sinkpad = NULL;
1673 /* reset each of our sinkpads state */
1674 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
1675 GstSelectorPad *selpad = GST_SELECTOR_PAD_CAST (walk->data);
1677 gst_selector_pad_reset (selpad);
1680 gst_tag_list_unref (selpad->tags);
1681 selpad->tags = NULL;
1684 GST_INPUT_SELECTOR_UNLOCK (sel);
1687 static GstStateChangeReturn
1688 gst_input_selector_change_state (GstElement * element,
1689 GstStateChange transition)
1691 GstInputSelector *self = GST_INPUT_SELECTOR (element);
1692 GstStateChangeReturn result;
1694 switch (transition) {
1695 case GST_STATE_CHANGE_READY_TO_PAUSED:
1696 GST_INPUT_SELECTOR_LOCK (self);
1697 self->blocked = FALSE;
1698 self->flushing = FALSE;
1699 GST_INPUT_SELECTOR_UNLOCK (self);
1701 case GST_STATE_CHANGE_PAUSED_TO_READY:
1702 /* first unlock before we call the parent state change function, which
1703 * tries to acquire the stream lock when going to ready. */
1704 GST_INPUT_SELECTOR_LOCK (self);
1705 self->blocked = FALSE;
1706 self->flushing = TRUE;
1707 GST_INPUT_SELECTOR_BROADCAST (self);
1708 GST_INPUT_SELECTOR_UNLOCK (self);
1714 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1716 switch (transition) {
1717 case GST_STATE_CHANGE_PAUSED_TO_READY:
1718 gst_input_selector_reset (self);
1728 gst_input_selector_block (GstInputSelector * self)
1731 GstSelectorPad *spad;
1733 GST_INPUT_SELECTOR_LOCK (self);
1736 GST_WARNING_OBJECT (self, "switch already blocked");
1738 self->blocked = TRUE;
1739 spad = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
1742 ret = gst_selector_pad_get_running_time (spad);
1744 GST_DEBUG_OBJECT (self, "no active pad while blocking");
1746 GST_INPUT_SELECTOR_UNLOCK (self);