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);
483 GST_INPUT_SELECTOR_BROADCAST (sel);
485 case GST_EVENT_SEGMENT:
487 gst_event_copy_segment (event, &selpad->segment);
488 selpad->segment_seqnum = gst_event_get_seqnum (event);
490 /* Update the position */
491 if (selpad->position == GST_CLOCK_TIME_NONE
492 || selpad->segment.position > selpad->position) {
493 selpad->position = selpad->segment.position;
494 } else if (selpad->position != GST_CLOCK_TIME_NONE
495 && selpad->position > selpad->segment.position) {
496 selpad->segment.position = selpad->position;
499 gst_event_unref (event);
500 event = gst_event_new_segment (&selpad->segment);
501 gst_event_set_seqnum (event, selpad->segment_seqnum);
504 GST_DEBUG_OBJECT (pad, "configured SEGMENT %" GST_SEGMENT_FORMAT,
510 GstTagList *tags, *oldtags, *newtags;
512 gst_event_parse_tag (event, &tags);
514 oldtags = selpad->tags;
516 newtags = gst_tag_list_merge (oldtags, tags, GST_TAG_MERGE_REPLACE);
517 selpad->tags = newtags;
519 gst_tag_list_unref (oldtags);
520 GST_DEBUG_OBJECT (pad, "received tags %" GST_PTR_FORMAT, newtags);
522 g_object_notify (G_OBJECT (selpad), "tags");
529 selpad->eos_sent = TRUE;
531 GstSelectorPad *active_selpad;
533 /* If the active sinkpad is in EOS state but EOS
534 * was not sent downstream this means that the pad
535 * got EOS before it was set as active pad and that
536 * the previously active pad got EOS after it was
539 active_selpad = GST_SELECTOR_PAD (active_sinkpad);
540 forward = (active_selpad->eos && !active_selpad->eos_sent);
541 active_selpad->eos_sent = TRUE;
543 GST_DEBUG_OBJECT (pad, "received EOS");
548 GST_INPUT_SELECTOR_UNLOCK (sel);
550 GST_DEBUG_OBJECT (pad, "forwarding event");
551 res = gst_pad_push_event (sel->srcpad, event);
553 /* If we aren't forwarding the event because the pad is not the
554 * active_sinkpad, then set the flag on the pad
555 * that says a segment needs sending if/when that pad is activated.
556 * For all other cases, we send the event immediately, which makes
557 * sparse streams and other segment updates work correctly downstream.
559 if (GST_EVENT_IS_STICKY (event))
560 selpad->events_pending = TRUE;
561 gst_event_unref (event);
568 gst_selector_pad_query (GstPad * pad, GstObject * parent, GstQuery * query)
570 gboolean res = FALSE;
572 switch (GST_QUERY_TYPE (query)) {
574 res = gst_pad_query_default (pad, parent, query);
581 /* must be called with the SELECTOR_LOCK, will block while the pad is blocked
582 * or return TRUE when flushing */
584 gst_input_selector_wait (GstInputSelector * self, GstSelectorPad * pad)
586 while (self->blocked && !self->flushing && !pad->flushing) {
587 /* we can be unlocked here when we are shutting down (flushing) or when we
589 GST_INPUT_SELECTOR_WAIT (self);
591 return self->flushing;
594 /* must be called without the SELECTOR_LOCK, will wait until the running time
595 * of the active pad is after this pad or return TRUE when flushing */
597 gst_input_selector_wait_running_time (GstInputSelector * sel,
598 GstSelectorPad * selpad, GstBuffer * buf)
602 GST_DEBUG_OBJECT (selpad, "entering wait for buffer %p", buf);
604 /* If we have no valid timestamp we can't sync this buffer */
605 if (!GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
606 GST_DEBUG_OBJECT (selpad, "leaving wait for buffer with "
607 "invalid timestamp");
611 seg = &selpad->segment;
614 * a) this is the active pad
615 * b) the pad or the selector is flushing
616 * c) the selector is not blocked
617 * d) the buffer running time is before the current running time
618 * (either active-seg or clock, depending on sync-mode)
621 GST_INPUT_SELECTOR_LOCK (sel);
623 GstPad *active_sinkpad;
624 GstSelectorPad *active_selpad;
626 gint64 cur_running_time;
627 GstClockTime running_time;
630 gst_input_selector_activate_sinkpad (sel, GST_PAD_CAST (selpad));
631 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
633 running_time = GST_BUFFER_TIMESTAMP (buf);
634 /* If possible try to get the running time at the end of the buffer */
635 if (GST_BUFFER_DURATION_IS_VALID (buf))
636 running_time += GST_BUFFER_DURATION (buf);
637 /* Only use the segment to convert to running time if the segment is
638 * in TIME format, otherwise do our best to try to sync */
639 if (seg->format == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (seg->stop)) {
640 if (running_time > seg->stop) {
641 running_time = seg->stop;
644 gst_segment_to_running_time (seg, GST_FORMAT_TIME, running_time);
645 /* If this is outside the segment don't sync */
646 if (running_time == -1) {
647 GST_INPUT_SELECTOR_UNLOCK (sel);
652 cur_running_time = GST_CLOCK_TIME_NONE;
653 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
654 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
656 GstClockTime base_time;
658 cur_running_time = gst_clock_get_time (clock);
659 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
660 if (base_time <= cur_running_time)
661 cur_running_time -= base_time;
663 cur_running_time = 0;
666 GstSegment *active_seg;
668 active_seg = &active_selpad->segment;
670 /* Get active pad's running time, if no configured segment yet keep at -1 */
671 if (active_seg->format == GST_FORMAT_TIME)
672 cur_running_time = gst_segment_to_running_time (active_seg,
673 GST_FORMAT_TIME, active_seg->position);
676 if (selpad != active_selpad && !sel->flushing && !selpad->flushing &&
677 (sel->cache_buffers || active_selpad->pushed) &&
678 (sel->blocked || cur_running_time == -1
679 || running_time >= cur_running_time)) {
681 GST_DEBUG_OBJECT (selpad,
682 "Waiting for active streams to advance. %" GST_TIME_FORMAT " >= %"
683 GST_TIME_FORMAT, GST_TIME_ARGS (running_time),
684 GST_TIME_ARGS (cur_running_time));
686 GST_INPUT_SELECTOR_WAIT (sel);
688 GST_INPUT_SELECTOR_UNLOCK (sel);
693 /* Return TRUE if the selector or the pad is flushing */
694 return (sel->flushing || selpad->flushing);
698 forward_sticky_events (GstPad * sinkpad, GstEvent ** event, gpointer user_data)
700 GstInputSelector *sel = GST_INPUT_SELECTOR (user_data);
702 if (GST_EVENT_TYPE (*event) == GST_EVENT_SEGMENT) {
703 GstSegment *seg = &GST_SELECTOR_PAD (sinkpad)->segment;
706 e = gst_event_new_segment (seg);
707 gst_event_set_seqnum (e, GST_SELECTOR_PAD_CAST (sinkpad)->segment_seqnum);
709 gst_pad_push_event (sel->srcpad, e);
711 gst_pad_push_event (sel->srcpad, gst_event_ref (*event));
717 #if DEBUG_CACHED_BUFFERS
719 gst_input_selector_debug_cached_buffers (GstInputSelector * sel)
723 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
724 GstSelectorPad *selpad;
729 selpad = GST_SELECTOR_PAD_CAST (walk->data);
730 if (!selpad->cached_buffers) {
731 GST_DEBUG_OBJECT (selpad, "Cached buffers timestamps: <none>");
735 timestamps = g_string_new ("Cached buffers timestamps:");
736 for (i = 0; i < selpad->cached_buffers->length; ++i) {
737 GstSelectorPadCachedBuffer *cached_buffer;
739 cached_buffer = g_queue_peek_nth (selpad->cached_buffers, i);
740 g_string_append_printf (timestamps, " %" GST_TIME_FORMAT,
741 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (cached_buffer->buffer)));
743 str = g_string_free (timestamps, FALSE);
744 GST_DEBUG_OBJECT (selpad, str);
750 /* must be called with the SELECTOR_LOCK */
752 gst_input_selector_cleanup_old_cached_buffers (GstInputSelector * sel,
755 GstSelectorPad *selpad;
758 gint64 cur_running_time;
761 selpad = GST_SELECTOR_PAD_CAST (pad);
762 seg = &selpad->segment;
764 cur_running_time = GST_CLOCK_TIME_NONE;
765 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
766 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
768 GstClockTime base_time;
770 cur_running_time = gst_clock_get_time (clock);
771 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
772 if (base_time <= cur_running_time)
773 cur_running_time -= base_time;
775 cur_running_time = 0;
778 GstPad *active_sinkpad;
779 GstSelectorPad *active_selpad;
780 GstSegment *active_seg;
782 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
783 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
784 active_seg = &active_selpad->segment;
786 /* Get active pad's running time, if no configured segment yet keep at -1 */
787 if (active_seg->format == GST_FORMAT_TIME)
788 cur_running_time = gst_segment_to_running_time (active_seg,
789 GST_FORMAT_TIME, active_seg->position);
792 if (!GST_CLOCK_TIME_IS_VALID (cur_running_time))
795 GST_DEBUG_OBJECT (sel, "Cleaning up old cached buffers");
796 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
797 GstSelectorPad *selpad = GST_SELECTOR_PAD_CAST (walk->data);
798 GstSelectorPadCachedBuffer *cached_buffer;
799 GSList *maybe_remove;
800 guint queue_position;
802 if (!selpad->cached_buffers)
807 while ((cached_buffer = g_queue_peek_nth (selpad->cached_buffers,
809 GstBuffer *buffer = cached_buffer->buffer;
810 GstClockTime running_time;
813 /* If we have no valid timestamp we can't sync this buffer */
814 if (!GST_BUFFER_TIMESTAMP_IS_VALID (buffer)) {
815 maybe_remove = g_slist_append (maybe_remove, cached_buffer);
816 queue_position = g_slist_length (maybe_remove);
820 /* the buffer is still valid if its duration is valid and the
821 * timestamp + duration is >= time, or if its duration is invalid
822 * and the timestamp is >= time */
823 running_time = GST_BUFFER_TIMESTAMP (buffer);
824 /* If possible try to get the running time at the end of the buffer */
825 if (GST_BUFFER_DURATION_IS_VALID (buffer))
826 running_time += GST_BUFFER_DURATION (buffer);
827 /* Only use the segment to convert to running time if the segment is
828 * in TIME format, otherwise do our best to try to sync */
829 if (seg->format == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (seg->stop)) {
830 if (running_time > seg->stop) {
831 running_time = seg->stop;
834 gst_segment_to_running_time (seg, GST_FORMAT_TIME, running_time);
837 GST_DEBUG_OBJECT (selpad,
838 "checking if buffer %p running time=%" GST_TIME_FORMAT
839 " >= stream time=%" GST_TIME_FORMAT, buffer,
840 GST_TIME_ARGS (running_time), GST_TIME_ARGS (cur_running_time));
841 if (running_time >= cur_running_time) {
845 GST_DEBUG_OBJECT (selpad, "Removing old cached buffer %p", buffer);
846 g_queue_pop_nth (selpad->cached_buffers, queue_position);
847 gst_selector_pad_free_cached_buffer (cached_buffer);
849 for (l = maybe_remove; l != NULL; l = g_slist_next (l)) {
850 /* A buffer after some invalid buffers was removed, it means the invalid buffers
851 * are old, lets also remove them */
852 cached_buffer = l->data;
853 g_queue_remove (selpad->cached_buffers, cached_buffer);
854 gst_selector_pad_free_cached_buffer (cached_buffer);
857 g_slist_free (maybe_remove);
862 g_slist_free (maybe_remove);
865 if (g_queue_is_empty (selpad->cached_buffers)) {
866 g_queue_free (selpad->cached_buffers);
867 selpad->cached_buffers = NULL;
871 #if DEBUG_CACHED_BUFFERS
872 gst_input_selector_debug_cached_buffers (sel);
877 gst_selector_pad_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
879 GstInputSelector *sel;
881 GstPad *active_sinkpad;
882 GstPad *prev_active_sinkpad;
883 GstSelectorPad *selpad;
884 GstClockTime start_time;
886 sel = GST_INPUT_SELECTOR (parent);
887 selpad = GST_SELECTOR_PAD_CAST (pad);
889 GST_DEBUG_OBJECT (selpad,
890 "entering chain for buf %p with timestamp %" GST_TIME_FORMAT, buf,
891 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
893 GST_INPUT_SELECTOR_LOCK (sel);
894 /* wait or check for flushing */
895 if (gst_input_selector_wait (sel, selpad)) {
896 GST_INPUT_SELECTOR_UNLOCK (sel);
900 GST_LOG_OBJECT (pad, "getting active pad");
902 prev_active_sinkpad = sel->active_sinkpad;
903 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
905 /* In sync mode wait until the active pad has advanced
906 * after the running time of the current buffer */
907 if (sel->sync_streams) {
908 /* call chain for each cached buffer if we are not the active pad
909 * or if we are the active pad but didn't push anything yet. */
910 if (active_sinkpad != pad || !selpad->pushed) {
911 /* no need to check for sel->cache_buffers as selpad->cached_buffers
912 * will only be valid if cache_buffers is TRUE */
913 if (selpad->cached_buffers && !selpad->sending_cached_buffers) {
914 GstSelectorPadCachedBuffer *cached_buffer;
915 GstSegment saved_segment;
917 saved_segment = selpad->segment;
919 selpad->sending_cached_buffers = TRUE;
920 while (!sel->flushing && !selpad->flushing &&
921 (cached_buffer = g_queue_pop_head (selpad->cached_buffers))) {
922 GST_DEBUG_OBJECT (pad, "Cached buffers found, "
923 "invoking chain for cached buffer %p", cached_buffer->buffer);
925 selpad->segment = cached_buffer->segment;
926 selpad->events_pending = TRUE;
927 GST_INPUT_SELECTOR_UNLOCK (sel);
928 gst_selector_pad_chain (pad, parent, cached_buffer->buffer);
929 GST_INPUT_SELECTOR_LOCK (sel);
931 /* we may have cleaned up the queue in the meantime because of
933 if (!selpad->cached_buffers) {
937 selpad->sending_cached_buffers = FALSE;
939 /* all cached buffers sent, restore segment for current buffer */
940 selpad->segment = saved_segment;
941 selpad->events_pending = TRUE;
943 /* Might have changed while calling chain for cached buffers */
944 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
948 if (active_sinkpad != pad) {
949 GST_INPUT_SELECTOR_UNLOCK (sel);
950 if (gst_input_selector_wait_running_time (sel, selpad, buf))
952 GST_INPUT_SELECTOR_LOCK (sel);
955 /* Might have changed while waiting */
956 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
959 /* update the segment on the srcpad */
960 start_time = GST_BUFFER_TIMESTAMP (buf);
961 if (GST_CLOCK_TIME_IS_VALID (start_time)) {
962 GST_LOG_OBJECT (pad, "received start time %" GST_TIME_FORMAT,
963 GST_TIME_ARGS (start_time));
964 if (GST_BUFFER_DURATION_IS_VALID (buf))
965 GST_LOG_OBJECT (pad, "received end time %" GST_TIME_FORMAT,
966 GST_TIME_ARGS (start_time + GST_BUFFER_DURATION (buf)));
968 GST_OBJECT_LOCK (pad);
969 selpad->position = start_time;
970 selpad->segment.position = start_time;
971 GST_OBJECT_UNLOCK (pad);
974 /* Ignore buffers from pads except the selected one */
975 if (pad != active_sinkpad)
978 /* Tell all non-active pads that we advanced the running time */
979 if (sel->sync_streams)
980 GST_INPUT_SELECTOR_BROADCAST (sel);
982 GST_INPUT_SELECTOR_UNLOCK (sel);
984 if (prev_active_sinkpad != active_sinkpad && pad == active_sinkpad) {
985 g_object_notify (G_OBJECT (sel), "active-pad");
988 /* if we have a pending events, push them now */
989 if (G_UNLIKELY (prev_active_sinkpad != active_sinkpad
990 || selpad->events_pending)) {
991 gst_pad_sticky_events_foreach (GST_PAD_CAST (selpad), forward_sticky_events,
993 selpad->events_pending = FALSE;
996 if (selpad->discont) {
997 buf = gst_buffer_make_writable (buf);
999 GST_DEBUG_OBJECT (pad, "Marking discont buffer %p", buf);
1000 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
1001 selpad->discont = FALSE;
1005 GST_LOG_OBJECT (pad, "Forwarding buffer %p with timestamp %" GST_TIME_FORMAT,
1006 buf, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
1008 res = gst_pad_push (sel->srcpad, gst_buffer_ref (buf));
1009 GST_LOG_OBJECT (pad, "Buffer %p forwarded result=%d", buf, res);
1011 GST_INPUT_SELECTOR_LOCK (sel);
1013 if (sel->sync_streams && sel->cache_buffers) {
1014 /* Might have changed while pushing */
1015 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
1016 /* only set pad to pushed if we are still the active pad */
1017 if (active_sinkpad == pad)
1018 selpad->pushed = TRUE;
1020 /* cache buffer as we may need it again if we change pads */
1021 gst_selector_pad_cache_buffer (selpad, buf);
1022 gst_input_selector_cleanup_old_cached_buffers (sel, pad);
1024 selpad->pushed = TRUE;
1025 gst_buffer_unref (buf);
1027 GST_INPUT_SELECTOR_UNLOCK (sel);
1032 /* dropped buffers */
1035 gboolean active_pad_pushed = GST_SELECTOR_PAD_CAST (active_sinkpad)->pushed;
1037 GST_DEBUG_OBJECT (pad, "Pad not active or buffer timestamp is invalid, "
1038 "discard buffer %p", buf);
1039 /* when we drop a buffer, we're creating a discont on this pad */
1040 selpad->discont = TRUE;
1041 GST_INPUT_SELECTOR_UNLOCK (sel);
1042 gst_buffer_unref (buf);
1044 /* figure out what to return upstream */
1045 GST_OBJECT_LOCK (selpad);
1046 if (selpad->always_ok || !active_pad_pushed)
1049 res = GST_FLOW_NOT_LINKED;
1050 GST_OBJECT_UNLOCK (selpad);
1056 GST_DEBUG_OBJECT (pad, "We are flushing, discard buffer %p", buf);
1057 gst_buffer_unref (buf);
1058 res = GST_FLOW_FLUSHING;
1063 static void gst_input_selector_dispose (GObject * object);
1064 static void gst_input_selector_finalize (GObject * object);
1066 static void gst_input_selector_set_property (GObject * object,
1067 guint prop_id, const GValue * value, GParamSpec * pspec);
1068 static void gst_input_selector_get_property (GObject * object,
1069 guint prop_id, GValue * value, GParamSpec * pspec);
1071 static GstPad *gst_input_selector_request_new_pad (GstElement * element,
1072 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps);
1073 static void gst_input_selector_release_pad (GstElement * element, GstPad * pad);
1075 static GstStateChangeReturn gst_input_selector_change_state (GstElement *
1076 element, GstStateChange transition);
1078 static gboolean gst_input_selector_event (GstPad * pad, GstObject * parent,
1080 static gboolean gst_input_selector_query (GstPad * pad, GstObject * parent,
1082 static gint64 gst_input_selector_block (GstInputSelector * self);
1084 /* FIXME: create these marshallers using glib-genmarshal */
1086 gst_input_selector_marshal_INT64__VOID (GClosure * closure,
1087 GValue * return_value G_GNUC_UNUSED,
1088 guint n_param_values,
1089 const GValue * param_values,
1090 gpointer invocation_hint G_GNUC_UNUSED, gpointer marshal_data)
1092 typedef gint64 (*GMarshalFunc_INT64__VOID) (gpointer data1, gpointer data2);
1093 register GMarshalFunc_INT64__VOID callback;
1094 register GCClosure *cc = (GCClosure *) closure;
1095 register gpointer data1, data2;
1098 g_return_if_fail (return_value != NULL);
1099 g_return_if_fail (n_param_values == 1);
1101 if (G_CCLOSURE_SWAP_DATA (closure)) {
1102 data1 = closure->data;
1103 data2 = g_value_peek_pointer (param_values + 0);
1105 data1 = g_value_peek_pointer (param_values + 0);
1106 data2 = closure->data;
1109 (GMarshalFunc_INT64__VOID) (marshal_data ? marshal_data : cc->callback);
1111 v_return = callback (data1, data2);
1113 g_value_set_int64 (return_value, v_return);
1117 GST_DEBUG_CATEGORY_INIT (input_selector_debug, \
1118 "input-selector", 0, "An input stream selector element");
1119 #define gst_input_selector_parent_class parent_class
1120 G_DEFINE_TYPE_WITH_CODE (GstInputSelector, gst_input_selector, GST_TYPE_ELEMENT,
1124 gst_input_selector_class_init (GstInputSelectorClass * klass)
1126 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
1127 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
1129 gobject_class->dispose = gst_input_selector_dispose;
1130 gobject_class->finalize = gst_input_selector_finalize;
1132 gobject_class->set_property = gst_input_selector_set_property;
1133 gobject_class->get_property = gst_input_selector_get_property;
1135 g_object_class_install_property (gobject_class, PROP_N_PADS,
1136 g_param_spec_uint ("n-pads", "Number of Pads",
1137 "The number of sink pads", 0, G_MAXUINT, 0,
1138 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
1140 g_object_class_install_property (gobject_class, PROP_ACTIVE_PAD,
1141 g_param_spec_object ("active-pad", "Active pad",
1142 "The currently active sink pad", GST_TYPE_PAD,
1143 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
1146 * GstInputSelector:sync-streams
1148 * If set to %TRUE all inactive streams will be synced to the
1149 * running time of the active stream or to the current clock.
1151 * To make sure no buffers are dropped by input-selector
1152 * that might be needed when switching the active pad,
1153 * sync-mode should be set to "clock" and cache-buffers to TRUE.
1157 g_object_class_install_property (gobject_class, PROP_SYNC_STREAMS,
1158 g_param_spec_boolean ("sync-streams", "Sync Streams",
1159 "Synchronize inactive streams to the running time of the active "
1160 "stream or to the current clock",
1161 DEFAULT_SYNC_STREAMS,
1162 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1163 GST_PARAM_MUTABLE_READY));
1166 * GstInputSelector:sync-mode
1168 * Select how input-selector will sync buffers when in sync-streams mode.
1170 * Note that when using the "active-segment" mode, the "active-segment" may
1171 * be ahead of current clock time when switching the active pad, as the current
1172 * active pad may have pushed more buffers than what was displayed/consumed,
1173 * which may cause delays and some missing buffers.
1177 g_object_class_install_property (gobject_class, PROP_SYNC_MODE,
1178 g_param_spec_enum ("sync-mode", "Sync mode",
1179 "Behavior in sync-streams mode", GST_TYPE_INPUT_SELECTOR_SYNC_MODE,
1181 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1182 GST_PARAM_MUTABLE_READY));
1185 * GstInputSelector:cache-buffers
1187 * If set to %TRUE and GstInputSelector:sync-streams is also set to %TRUE,
1188 * the active pad will cache the buffers still considered valid (after current
1189 * running time, see sync-mode) to avoid missing frames if/when the pad is
1192 * The active pad may push more buffers than what is currently displayed/consumed
1193 * and when changing pads those buffers will be discarded and the only way to
1194 * reactivate that pad without loosing the already consumed buffers is to enable cache.
1196 g_object_class_install_property (gobject_class, PROP_CACHE_BUFFERS,
1197 g_param_spec_boolean ("cache-buffers", "Cache Buffers",
1198 "Cache buffers for active-pad",
1199 DEFAULT_CACHE_BUFFERS,
1200 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1201 GST_PARAM_MUTABLE_READY));
1204 * GstInputSelector::block:
1205 * @inputselector: the #GstInputSelector
1207 * Block all sink pads in preparation for a switch. Returns the stop time of
1208 * the current switch segment, as a running time, or 0 if there is no current
1209 * active pad or the current active pad never received data.
1211 gst_input_selector_signals[SIGNAL_BLOCK] =
1212 g_signal_new ("block", G_TYPE_FROM_CLASS (klass),
1213 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1214 G_STRUCT_OFFSET (GstInputSelectorClass, block), NULL, NULL,
1215 gst_input_selector_marshal_INT64__VOID, G_TYPE_INT64, 0);
1217 gst_element_class_set_static_metadata (gstelement_class, "Input selector",
1218 "Generic", "N-to-1 input stream selector",
1219 "Julien Moutte <julien@moutte.net>, "
1220 "Jan Schmidt <thaytan@mad.scientist.com>, "
1221 "Wim Taymans <wim.taymans@gmail.com>");
1222 gst_element_class_add_pad_template (gstelement_class,
1223 gst_static_pad_template_get (&gst_input_selector_sink_factory));
1224 gst_element_class_add_pad_template (gstelement_class,
1225 gst_static_pad_template_get (&gst_input_selector_src_factory));
1227 gstelement_class->request_new_pad = gst_input_selector_request_new_pad;
1228 gstelement_class->release_pad = gst_input_selector_release_pad;
1229 gstelement_class->change_state = gst_input_selector_change_state;
1231 klass->block = GST_DEBUG_FUNCPTR (gst_input_selector_block);
1235 gst_input_selector_init (GstInputSelector * sel)
1237 sel->srcpad = gst_pad_new ("src", GST_PAD_SRC);
1238 gst_pad_set_iterate_internal_links_function (sel->srcpad,
1239 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1240 gst_pad_set_query_function (sel->srcpad,
1241 GST_DEBUG_FUNCPTR (gst_input_selector_query));
1242 gst_pad_set_event_function (sel->srcpad,
1243 GST_DEBUG_FUNCPTR (gst_input_selector_event));
1244 GST_OBJECT_FLAG_SET (sel->srcpad, GST_PAD_FLAG_PROXY_CAPS);
1245 gst_element_add_pad (GST_ELEMENT (sel), sel->srcpad);
1246 /* sinkpad management */
1247 sel->active_sinkpad = NULL;
1249 sel->sync_streams = DEFAULT_SYNC_STREAMS;
1251 g_mutex_init (&sel->lock);
1252 g_cond_init (&sel->cond);
1253 sel->blocked = FALSE;
1255 /* lets give a change for downstream to do something on
1256 * active-pad change before we start pushing new buffers */
1257 g_signal_connect_data (sel, "notify::active-pad",
1258 (GCallback) gst_input_selector_active_pad_changed, NULL,
1259 NULL, G_CONNECT_AFTER);
1263 gst_input_selector_dispose (GObject * object)
1265 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1267 if (sel->active_sinkpad) {
1268 gst_object_unref (sel->active_sinkpad);
1269 sel->active_sinkpad = NULL;
1271 G_OBJECT_CLASS (parent_class)->dispose (object);
1275 gst_input_selector_finalize (GObject * object)
1277 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1279 g_mutex_clear (&sel->lock);
1280 g_cond_clear (&sel->cond);
1282 G_OBJECT_CLASS (parent_class)->finalize (object);
1285 /* this function must be called with the SELECTOR_LOCK. It returns TRUE when the
1286 * active pad changed. */
1288 gst_input_selector_set_active_pad (GstInputSelector * self, GstPad * pad)
1290 GstSelectorPad *old, *new;
1291 GstPad **active_pad_p;
1293 if (pad == self->active_sinkpad)
1296 old = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
1297 new = GST_SELECTOR_PAD_CAST (pad);
1299 GST_DEBUG_OBJECT (self, "setting active pad to %s:%s",
1300 GST_DEBUG_PAD_NAME (new));
1303 old->pushed = FALSE;
1305 new->pushed = FALSE;
1307 /* Send a new SEGMENT event on the new pad next */
1308 if (old != new && new)
1309 new->events_pending = TRUE;
1311 active_pad_p = &self->active_sinkpad;
1312 gst_object_replace ((GstObject **) active_pad_p, GST_OBJECT_CAST (pad));
1314 GST_DEBUG_OBJECT (self, "New active pad is %" GST_PTR_FORMAT,
1315 self->active_sinkpad);
1321 gst_input_selector_set_property (GObject * object, guint prop_id,
1322 const GValue * value, GParamSpec * pspec)
1324 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1327 case PROP_ACTIVE_PAD:
1331 pad = g_value_get_object (value);
1333 GST_INPUT_SELECTOR_LOCK (sel);
1335 #if DEBUG_CACHED_BUFFERS
1336 gst_input_selector_debug_cached_buffers (sel);
1339 gst_input_selector_set_active_pad (sel, pad);
1341 #if DEBUG_CACHED_BUFFERS
1342 gst_input_selector_debug_cached_buffers (sel);
1345 GST_INPUT_SELECTOR_UNLOCK (sel);
1348 case PROP_SYNC_STREAMS:
1349 GST_INPUT_SELECTOR_LOCK (sel);
1350 sel->sync_streams = g_value_get_boolean (value);
1351 GST_INPUT_SELECTOR_UNLOCK (sel);
1353 case PROP_SYNC_MODE:
1354 GST_INPUT_SELECTOR_LOCK (sel);
1355 sel->sync_mode = g_value_get_enum (value);
1356 GST_INPUT_SELECTOR_UNLOCK (sel);
1358 case PROP_CACHE_BUFFERS:
1359 GST_INPUT_SELECTOR_LOCK (object);
1360 sel->cache_buffers = g_value_get_boolean (value);
1361 GST_INPUT_SELECTOR_UNLOCK (object);
1364 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1370 gst_input_selector_active_pad_changed (GstInputSelector * sel,
1371 GParamSpec * pspec, gpointer user_data)
1373 /* Wake up all non-active pads in sync mode, they might be
1374 * the active pad now */
1375 if (sel->sync_streams)
1376 GST_INPUT_SELECTOR_BROADCAST (sel);
1380 gst_input_selector_get_property (GObject * object, guint prop_id,
1381 GValue * value, GParamSpec * pspec)
1383 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1387 GST_INPUT_SELECTOR_LOCK (object);
1388 g_value_set_uint (value, sel->n_pads);
1389 GST_INPUT_SELECTOR_UNLOCK (object);
1391 case PROP_ACTIVE_PAD:
1392 GST_INPUT_SELECTOR_LOCK (object);
1393 g_value_set_object (value, sel->active_sinkpad);
1394 GST_INPUT_SELECTOR_UNLOCK (object);
1396 case PROP_SYNC_STREAMS:
1397 GST_INPUT_SELECTOR_LOCK (object);
1398 g_value_set_boolean (value, sel->sync_streams);
1399 GST_INPUT_SELECTOR_UNLOCK (object);
1401 case PROP_SYNC_MODE:
1402 GST_INPUT_SELECTOR_LOCK (object);
1403 g_value_set_enum (value, sel->sync_mode);
1404 GST_INPUT_SELECTOR_UNLOCK (object);
1406 case PROP_CACHE_BUFFERS:
1407 GST_INPUT_SELECTOR_LOCK (object);
1408 g_value_set_boolean (value, sel->cache_buffers);
1409 GST_INPUT_SELECTOR_UNLOCK (object);
1412 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1418 gst_input_selector_get_linked_pad (GstInputSelector * sel, GstPad * pad,
1421 GstPad *otherpad = NULL;
1423 GST_INPUT_SELECTOR_LOCK (sel);
1424 if (pad == sel->srcpad)
1425 otherpad = sel->active_sinkpad;
1426 else if (pad == sel->active_sinkpad || !strict)
1427 otherpad = sel->srcpad;
1429 gst_object_ref (otherpad);
1430 GST_INPUT_SELECTOR_UNLOCK (sel);
1436 gst_input_selector_event (GstPad * pad, GstObject * parent, GstEvent * event)
1438 GstInputSelector *sel;
1439 gboolean result = FALSE;
1441 gboolean done = FALSE;
1442 GValue item = { 0, };
1444 GList *pushed_pads = NULL;
1446 sel = GST_INPUT_SELECTOR (parent);
1447 /* Send upstream events to all sinkpads */
1448 iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1450 /* This is now essentially a copy of gst_pad_event_default_dispatch
1451 * with a different iterator */
1453 switch (gst_iterator_next (iter, &item)) {
1454 case GST_ITERATOR_OK:
1455 eventpad = g_value_get_object (&item);
1457 /* if already pushed, skip */
1458 if (g_list_find (pushed_pads, eventpad)) {
1459 g_value_reset (&item);
1463 gst_event_ref (event);
1464 result |= gst_pad_push_event (eventpad, event);
1466 g_value_reset (&item);
1468 case GST_ITERATOR_RESYNC:
1469 /* We don't reset the result here because we don't push the event
1470 * again on pads that got the event already and because we need
1471 * to consider the result of the previous pushes */
1472 gst_iterator_resync (iter);
1474 case GST_ITERATOR_ERROR:
1475 GST_ERROR_OBJECT (pad, "Could not iterate over sinkpads");
1478 case GST_ITERATOR_DONE:
1483 g_value_unset (&item);
1484 gst_iterator_free (iter);
1486 g_list_free (pushed_pads);
1488 gst_event_unref (event);
1493 /* query on the srcpad. We override this function because by default it will
1494 * only forward the query to one random sinkpad */
1496 gst_input_selector_query (GstPad * pad, GstObject * parent, GstQuery * query)
1498 gboolean res = FALSE;
1499 GstInputSelector *sel;
1501 sel = GST_INPUT_SELECTOR (parent);
1503 switch (GST_QUERY_TYPE (query)) {
1504 case GST_QUERY_LATENCY:
1507 GstClockTime resmin, resmax;
1514 /* perform the query on all sinkpads and combine the results. We take the
1515 * max of min and the min of max for the result latency. */
1516 GST_INPUT_SELECTOR_LOCK (sel);
1517 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk;
1518 walk = g_list_next (walk)) {
1519 GstPad *sinkpad = GST_PAD_CAST (walk->data);
1521 if (gst_pad_peer_query (sinkpad, query)) {
1522 GstClockTime min, max;
1525 /* one query succeeded, we succeed too */
1528 gst_query_parse_latency (query, &live, &min, &max);
1530 GST_DEBUG_OBJECT (sinkpad,
1531 "peer latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
1532 ", live %d", GST_TIME_ARGS (min), GST_TIME_ARGS (max), live);
1539 else if (max < resmax)
1541 if (reslive == FALSE)
1546 GST_INPUT_SELECTOR_UNLOCK (sel);
1548 gst_query_set_latency (query, reslive, resmin, resmax);
1550 GST_DEBUG_OBJECT (sel,
1551 "total latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
1552 ", live %d", GST_TIME_ARGS (resmin), GST_TIME_ARGS (resmax),
1559 res = gst_pad_query_default (pad, parent, query);
1566 /* check if the pad is the active sinkpad */
1567 static inline gboolean
1568 gst_input_selector_is_active_sinkpad (GstInputSelector * sel, GstPad * pad)
1572 GST_INPUT_SELECTOR_LOCK (sel);
1573 res = (pad == sel->active_sinkpad);
1574 GST_INPUT_SELECTOR_UNLOCK (sel);
1579 /* Get or create the active sinkpad, must be called with SELECTOR_LOCK */
1581 gst_input_selector_activate_sinkpad (GstInputSelector * sel, GstPad * pad)
1583 GstPad *active_sinkpad;
1584 GstSelectorPad *selpad;
1586 selpad = GST_SELECTOR_PAD_CAST (pad);
1588 selpad->active = TRUE;
1589 active_sinkpad = sel->active_sinkpad;
1590 if (active_sinkpad == NULL) {
1591 /* first pad we get activity on becomes the activated pad by default */
1592 if (sel->active_sinkpad)
1593 gst_object_unref (sel->active_sinkpad);
1594 active_sinkpad = sel->active_sinkpad = gst_object_ref (pad);
1595 GST_DEBUG_OBJECT (sel, "Activating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1598 return active_sinkpad;
1602 gst_input_selector_request_new_pad (GstElement * element,
1603 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps)
1605 GstInputSelector *sel;
1607 GstPad *sinkpad = NULL;
1609 g_return_val_if_fail (templ->direction == GST_PAD_SINK, NULL);
1611 sel = GST_INPUT_SELECTOR (element);
1613 GST_INPUT_SELECTOR_LOCK (sel);
1615 GST_LOG_OBJECT (sel, "Creating new pad %d", sel->padcount);
1616 name = g_strdup_printf ("sink_%u", sel->padcount++);
1617 sinkpad = g_object_new (GST_TYPE_SELECTOR_PAD,
1618 "name", name, "direction", templ->direction, "template", templ, NULL);
1623 gst_pad_set_event_function (sinkpad,
1624 GST_DEBUG_FUNCPTR (gst_selector_pad_event));
1625 gst_pad_set_query_function (sinkpad,
1626 GST_DEBUG_FUNCPTR (gst_selector_pad_query));
1627 gst_pad_set_chain_function (sinkpad,
1628 GST_DEBUG_FUNCPTR (gst_selector_pad_chain));
1629 gst_pad_set_iterate_internal_links_function (sinkpad,
1630 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1632 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_CAPS);
1633 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_ALLOCATION);
1634 gst_pad_set_active (sinkpad, TRUE);
1635 gst_element_add_pad (GST_ELEMENT (sel), sinkpad);
1636 GST_INPUT_SELECTOR_UNLOCK (sel);
1642 gst_input_selector_release_pad (GstElement * element, GstPad * pad)
1644 GstInputSelector *sel;
1646 sel = GST_INPUT_SELECTOR (element);
1647 GST_LOG_OBJECT (sel, "Releasing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1649 GST_INPUT_SELECTOR_LOCK (sel);
1650 /* if the pad was the active pad, makes us select a new one */
1651 if (sel->active_sinkpad == pad) {
1652 GST_DEBUG_OBJECT (sel, "Deactivating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1653 gst_object_unref (sel->active_sinkpad);
1654 sel->active_sinkpad = NULL;
1658 gst_pad_set_active (pad, FALSE);
1659 gst_element_remove_pad (GST_ELEMENT (sel), pad);
1660 GST_INPUT_SELECTOR_UNLOCK (sel);
1664 gst_input_selector_reset (GstInputSelector * sel)
1668 GST_INPUT_SELECTOR_LOCK (sel);
1669 /* clear active pad */
1670 if (sel->active_sinkpad) {
1671 gst_object_unref (sel->active_sinkpad);
1672 sel->active_sinkpad = NULL;
1674 /* reset each of our sinkpads state */
1675 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
1676 GstSelectorPad *selpad = GST_SELECTOR_PAD_CAST (walk->data);
1678 gst_selector_pad_reset (selpad);
1681 gst_tag_list_unref (selpad->tags);
1682 selpad->tags = NULL;
1685 GST_INPUT_SELECTOR_UNLOCK (sel);
1688 static GstStateChangeReturn
1689 gst_input_selector_change_state (GstElement * element,
1690 GstStateChange transition)
1692 GstInputSelector *self = GST_INPUT_SELECTOR (element);
1693 GstStateChangeReturn result;
1695 switch (transition) {
1696 case GST_STATE_CHANGE_READY_TO_PAUSED:
1697 GST_INPUT_SELECTOR_LOCK (self);
1698 self->blocked = FALSE;
1699 self->flushing = FALSE;
1700 GST_INPUT_SELECTOR_UNLOCK (self);
1702 case GST_STATE_CHANGE_PAUSED_TO_READY:
1703 /* first unlock before we call the parent state change function, which
1704 * tries to acquire the stream lock when going to ready. */
1705 GST_INPUT_SELECTOR_LOCK (self);
1706 self->blocked = FALSE;
1707 self->flushing = TRUE;
1708 GST_INPUT_SELECTOR_BROADCAST (self);
1709 GST_INPUT_SELECTOR_UNLOCK (self);
1715 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1717 switch (transition) {
1718 case GST_STATE_CHANGE_PAUSED_TO_READY:
1719 gst_input_selector_reset (self);
1729 gst_input_selector_block (GstInputSelector * self)
1732 GstSelectorPad *spad;
1734 GST_INPUT_SELECTOR_LOCK (self);
1737 GST_WARNING_OBJECT (self, "switch already blocked");
1739 self->blocked = TRUE;
1740 spad = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
1743 ret = gst_selector_pad_get_running_time (spad);
1745 GST_DEBUG_OBJECT (self, "no active pad while blocking");
1747 GST_INPUT_SELECTOR_UNLOCK (self);