1 /* GStreamer input selector
2 * Copyright (C) 2003 Julien Moutte <julien@moutte.net>
3 * Copyright (C) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
4 * Copyright (C) 2005 Jan Schmidt <thaytan@mad.scientist.com>
5 * Copyright (C) 2007 Wim Taymans <wim.taymans@gmail.com>
6 * Copyright (C) 2007 Andy Wingo <wingo@pobox.com>
7 * Copyright (C) 2008 Nokia Corporation. (contact <stefan.kost@nokia.com>)
8 * Copyright (C) 2011 Sebastian Dröge <sebastian.droege@collabora.co.uk>
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Library General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Library General Public License for more details.
20 * You should have received a copy of the GNU Library General Public
21 * License along with this library; if not, write to the
22 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
23 * Boston, MA 02110-1301, USA.
27 * SECTION:element-input-selector
28 * @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
58 #include "gstinputselector.h"
60 #define DEBUG_CACHED_BUFFERS 0
62 GST_DEBUG_CATEGORY_STATIC (input_selector_debug);
63 #define GST_CAT_DEFAULT input_selector_debug
65 #define GST_TYPE_INPUT_SELECTOR_SYNC_MODE (gst_input_selector_sync_mode_get_type())
67 gst_input_selector_sync_mode_get_type (void)
69 static GType type = 0;
70 static const GEnumValue data[] = {
71 {GST_INPUT_SELECTOR_SYNC_MODE_ACTIVE_SEGMENT,
72 "Sync using the current active segment",
74 {GST_INPUT_SELECTOR_SYNC_MODE_CLOCK, "Sync using the clock", "clock"},
79 type = g_enum_register_static ("GstInputSelectorSyncMode", data);
84 #define GST_INPUT_SELECTOR_GET_LOCK(sel) (&((GstInputSelector*)(sel))->lock)
85 #define GST_INPUT_SELECTOR_GET_COND(sel) (&((GstInputSelector*)(sel))->cond)
86 #define GST_INPUT_SELECTOR_LOCK(sel) (g_mutex_lock (GST_INPUT_SELECTOR_GET_LOCK(sel)))
87 #define GST_INPUT_SELECTOR_UNLOCK(sel) (g_mutex_unlock (GST_INPUT_SELECTOR_GET_LOCK(sel)))
88 #define GST_INPUT_SELECTOR_WAIT(sel) (g_cond_wait (GST_INPUT_SELECTOR_GET_COND(sel), \
89 GST_INPUT_SELECTOR_GET_LOCK(sel)))
90 #define GST_INPUT_SELECTOR_BROADCAST(sel) (g_cond_broadcast (GST_INPUT_SELECTOR_GET_COND(sel)))
92 static GstStaticPadTemplate gst_input_selector_sink_factory =
93 GST_STATIC_PAD_TEMPLATE ("sink_%u",
98 static GstStaticPadTemplate gst_input_selector_src_factory =
99 GST_STATIC_PAD_TEMPLATE ("src",
102 GST_STATIC_CAPS_ANY);
114 #define DEFAULT_SYNC_STREAMS TRUE
115 #define DEFAULT_SYNC_MODE GST_INPUT_SELECTOR_SYNC_MODE_ACTIVE_SEGMENT
116 #define DEFAULT_CACHE_BUFFERS FALSE
117 #define DEFAULT_PAD_ALWAYS_OK TRUE
122 PROP_PAD_RUNNING_TIME,
135 static guint gst_input_selector_signals[LAST_SIGNAL] = { 0 };
137 static void gst_input_selector_active_pad_changed (GstInputSelector * sel,
138 GParamSpec * pspec, gpointer user_data);
139 static inline gboolean gst_input_selector_is_active_sinkpad (GstInputSelector *
141 static GstPad *gst_input_selector_activate_sinkpad (GstInputSelector * sel,
143 static GstPad *gst_input_selector_get_linked_pad (GstInputSelector * sel,
144 GstPad * pad, gboolean strict);
146 #define GST_TYPE_SELECTOR_PAD \
147 (gst_selector_pad_get_type())
148 #define GST_SELECTOR_PAD(obj) \
149 (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_SELECTOR_PAD, GstSelectorPad))
150 #define GST_SELECTOR_PAD_CLASS(klass) \
151 (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_SELECTOR_PAD, GstSelectorPadClass))
152 #define GST_IS_SELECTOR_PAD(obj) \
153 (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_SELECTOR_PAD))
154 #define GST_IS_SELECTOR_PAD_CLASS(klass) \
155 (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_SELECTOR_PAD))
156 #define GST_SELECTOR_PAD_CAST(obj) \
157 ((GstSelectorPad *)(obj))
159 typedef struct _GstSelectorPad GstSelectorPad;
160 typedef struct _GstSelectorPadClass GstSelectorPadClass;
161 typedef struct _GstSelectorPadCachedBuffer GstSelectorPadCachedBuffer;
163 struct _GstSelectorPad
167 gboolean active; /* when buffer have passed the pad */
168 gboolean pushed; /* when buffer was pushed downstream since activation */
169 gboolean eos; /* when EOS has been received */
170 gboolean eos_sent; /* when EOS was sent downstream */
171 gboolean discont; /* after switching we create a discont */
172 gboolean flushing; /* set after flush-start and before flush-stop */
174 GstTagList *tags; /* last tags received on the pad */
176 GstClockTime position; /* the current position in the segment */
177 GstSegment segment; /* the current segment on the pad */
178 guint32 segment_seqnum; /* sequence number of the current segment */
180 gboolean events_pending; /* TRUE if sticky events need to be updated */
182 gboolean sending_cached_buffers;
183 GQueue *cached_buffers;
186 struct _GstSelectorPadCachedBuffer
192 struct _GstSelectorPadClass
197 GType gst_selector_pad_get_type (void);
198 static void gst_selector_pad_finalize (GObject * object);
199 static void gst_selector_pad_get_property (GObject * object,
200 guint prop_id, GValue * value, GParamSpec * pspec);
201 static void gst_selector_pad_set_property (GObject * object,
202 guint prop_id, const GValue * value, GParamSpec * pspec);
204 static gint64 gst_selector_pad_get_running_time (GstSelectorPad * pad);
205 static void gst_selector_pad_reset (GstSelectorPad * pad);
206 static gboolean gst_selector_pad_event (GstPad * pad, GstObject * parent,
208 static gboolean gst_selector_pad_query (GstPad * pad, GstObject * parent,
210 static GstIterator *gst_selector_pad_iterate_linked_pads (GstPad * pad,
212 static GstFlowReturn gst_selector_pad_chain (GstPad * pad, GstObject * parent,
214 static void gst_selector_pad_cache_buffer (GstSelectorPad * selpad,
216 static void gst_selector_pad_free_cached_buffers (GstSelectorPad * selpad);
218 G_DEFINE_TYPE (GstSelectorPad, gst_selector_pad, GST_TYPE_PAD);
221 gst_selector_pad_class_init (GstSelectorPadClass * klass)
223 GObjectClass *gobject_class;
225 gobject_class = (GObjectClass *) klass;
227 gobject_class->finalize = gst_selector_pad_finalize;
229 gobject_class->get_property = gst_selector_pad_get_property;
230 gobject_class->set_property = gst_selector_pad_set_property;
232 g_object_class_install_property (gobject_class, PROP_PAD_RUNNING_TIME,
233 g_param_spec_int64 ("running-time", "Running time",
234 "Running time of stream on pad", 0, G_MAXINT64, 0,
235 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
236 g_object_class_install_property (gobject_class, PROP_PAD_TAGS,
237 g_param_spec_boxed ("tags", "Tags",
238 "The currently active tags on the pad", GST_TYPE_TAG_LIST,
239 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
240 g_object_class_install_property (gobject_class, PROP_PAD_ACTIVE,
241 g_param_spec_boolean ("active", "Active",
242 "If the pad is currently active", FALSE,
243 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
244 /* FIXME: better property name? */
245 g_object_class_install_property (gobject_class, PROP_PAD_ALWAYS_OK,
246 g_param_spec_boolean ("always-ok", "Always OK",
247 "Make an inactive pad return OK instead of NOT_LINKED",
248 DEFAULT_PAD_ALWAYS_OK, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
252 gst_selector_pad_init (GstSelectorPad * pad)
254 pad->always_ok = DEFAULT_PAD_ALWAYS_OK;
255 gst_selector_pad_reset (pad);
259 gst_selector_pad_finalize (GObject * object)
263 pad = GST_SELECTOR_PAD_CAST (object);
266 gst_tag_list_unref (pad->tags);
267 gst_selector_pad_free_cached_buffers (pad);
269 G_OBJECT_CLASS (gst_selector_pad_parent_class)->finalize (object);
273 gst_selector_pad_set_property (GObject * object, guint prop_id,
274 const GValue * value, GParamSpec * pspec)
276 GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
279 case PROP_PAD_ALWAYS_OK:
280 GST_OBJECT_LOCK (object);
281 spad->always_ok = g_value_get_boolean (value);
282 GST_OBJECT_UNLOCK (object);
285 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
291 gst_selector_pad_get_property (GObject * object, guint prop_id,
292 GValue * value, GParamSpec * pspec)
294 GstSelectorPad *spad = GST_SELECTOR_PAD_CAST (object);
297 case PROP_PAD_RUNNING_TIME:
298 g_value_set_int64 (value, gst_selector_pad_get_running_time (spad));
301 GST_OBJECT_LOCK (object);
302 g_value_set_boxed (value, spad->tags);
303 GST_OBJECT_UNLOCK (object);
305 case PROP_PAD_ACTIVE:
307 GstInputSelector *sel;
309 sel = GST_INPUT_SELECTOR (gst_pad_get_parent (spad));
311 g_value_set_boolean (value, gst_input_selector_is_active_sinkpad (sel,
312 GST_PAD_CAST (spad)));
313 gst_object_unref (sel);
315 g_value_set_boolean (value, FALSE);
319 case PROP_PAD_ALWAYS_OK:
320 GST_OBJECT_LOCK (object);
321 g_value_set_boolean (value, spad->always_ok);
322 GST_OBJECT_UNLOCK (object);
325 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
331 gst_selector_pad_get_running_time (GstSelectorPad * pad)
335 GST_OBJECT_LOCK (pad);
337 guint64 position = pad->position;
338 GstFormat format = pad->segment.format;
340 ret = gst_segment_to_running_time (&pad->segment, format, position);
342 GST_OBJECT_UNLOCK (pad);
344 GST_DEBUG_OBJECT (pad, "running time: %" GST_TIME_FORMAT
345 " segment: %" GST_SEGMENT_FORMAT, GST_TIME_ARGS (ret), &pad->segment);
350 /* must be called with the SELECTOR_LOCK */
352 gst_selector_pad_reset (GstSelectorPad * pad)
354 GST_OBJECT_LOCK (pad);
358 pad->eos_sent = FALSE;
359 pad->events_pending = FALSE;
360 pad->discont = FALSE;
361 pad->flushing = FALSE;
362 pad->position = GST_CLOCK_TIME_NONE;
363 gst_segment_init (&pad->segment, GST_FORMAT_UNDEFINED);
364 pad->sending_cached_buffers = FALSE;
365 gst_selector_pad_free_cached_buffers (pad);
366 GST_OBJECT_UNLOCK (pad);
369 static GstSelectorPadCachedBuffer *
370 gst_selector_pad_new_cached_buffer (GstSelectorPad * selpad, GstBuffer * buffer)
372 GstSelectorPadCachedBuffer *cached_buffer =
373 g_slice_new (GstSelectorPadCachedBuffer);
374 cached_buffer->buffer = buffer;
375 cached_buffer->segment = selpad->segment;
376 return cached_buffer;
380 gst_selector_pad_free_cached_buffer (GstSelectorPadCachedBuffer * cached_buffer)
382 gst_buffer_unref (cached_buffer->buffer);
383 g_slice_free (GstSelectorPadCachedBuffer, cached_buffer);
386 /* must be called with the SELECTOR_LOCK */
388 gst_selector_pad_cache_buffer (GstSelectorPad * selpad, GstBuffer * buffer)
390 if (selpad->segment.format != GST_FORMAT_TIME) {
391 GST_DEBUG_OBJECT (selpad, "Buffer %p with segment not in time format, "
392 "not caching", buffer);
396 GST_DEBUG_OBJECT (selpad, "Caching buffer %p", buffer);
397 if (!selpad->cached_buffers)
398 selpad->cached_buffers = g_queue_new ();
399 g_queue_push_tail (selpad->cached_buffers,
400 gst_selector_pad_new_cached_buffer (selpad, buffer));
403 /* must be called with the SELECTOR_LOCK */
405 gst_selector_pad_free_cached_buffers (GstSelectorPad * selpad)
407 GstSelectorPadCachedBuffer *cached_buffer;
409 if (!selpad->cached_buffers)
412 GST_DEBUG_OBJECT (selpad, "Freeing cached buffers");
413 while ((cached_buffer = g_queue_pop_head (selpad->cached_buffers)))
414 gst_selector_pad_free_cached_buffer (cached_buffer);
415 g_queue_free (selpad->cached_buffers);
416 selpad->cached_buffers = NULL;
419 /* strictly get the linked pad from the sinkpad. If the pad is active we return
420 * the srcpad else we return NULL */
422 gst_selector_pad_iterate_linked_pads (GstPad * pad, GstObject * parent)
424 GstInputSelector *sel;
426 GstIterator *it = NULL;
429 sel = GST_INPUT_SELECTOR (parent);
431 otherpad = gst_input_selector_get_linked_pad (sel, pad, TRUE);
433 g_value_init (&val, GST_TYPE_PAD);
434 g_value_set_object (&val, otherpad);
435 it = gst_iterator_new_single (GST_TYPE_PAD, &val);
436 g_value_unset (&val);
437 gst_object_unref (otherpad);
444 gst_selector_pad_event (GstPad * pad, GstObject * parent, GstEvent * event)
448 gboolean new_tags = FALSE;
449 GstInputSelector *sel;
450 GstSelectorPad *selpad;
451 GstPad *prev_active_sinkpad;
452 GstPad *active_sinkpad;
454 sel = GST_INPUT_SELECTOR (parent);
455 selpad = GST_SELECTOR_PAD_CAST (pad);
456 GST_DEBUG_OBJECT (selpad, "received event %" GST_PTR_FORMAT, event);
458 GST_INPUT_SELECTOR_LOCK (sel);
459 prev_active_sinkpad =
460 sel->active_sinkpad ? gst_object_ref (sel->active_sinkpad) : NULL;
461 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
462 GST_INPUT_SELECTOR_UNLOCK (sel);
464 if (prev_active_sinkpad != active_sinkpad && pad == active_sinkpad) {
465 if (prev_active_sinkpad)
466 g_object_notify (G_OBJECT (prev_active_sinkpad), "active");
467 g_object_notify (G_OBJECT (active_sinkpad), "active");
468 g_object_notify (G_OBJECT (sel), "active-pad");
470 if (prev_active_sinkpad)
471 gst_object_unref (prev_active_sinkpad);
473 GST_INPUT_SELECTOR_LOCK (sel);
474 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
476 /* only forward if we are dealing with the active sinkpad */
477 forward = (pad == active_sinkpad);
479 switch (GST_EVENT_TYPE (event)) {
480 case GST_EVENT_FLUSH_START:
481 /* Unblock the pad if it's waiting */
482 selpad->flushing = TRUE;
483 GST_INPUT_SELECTOR_BROADCAST (sel);
485 case GST_EVENT_FLUSH_STOP:
486 gst_selector_pad_reset (selpad);
488 case GST_EVENT_SEGMENT:
490 gst_event_copy_segment (event, &selpad->segment);
491 selpad->segment_seqnum = gst_event_get_seqnum (event);
493 /* Update the position */
494 if (selpad->position == GST_CLOCK_TIME_NONE
495 || selpad->segment.position > selpad->position) {
496 selpad->position = selpad->segment.position;
497 } else if (selpad->position != GST_CLOCK_TIME_NONE
498 && selpad->position > selpad->segment.position) {
499 selpad->segment.position = selpad->position;
502 gst_event_unref (event);
503 event = gst_event_new_segment (&selpad->segment);
504 gst_event_set_seqnum (event, selpad->segment_seqnum);
508 GST_DEBUG_OBJECT (pad, "configured SEGMENT %" GST_SEGMENT_FORMAT,
514 GstTagList *tags, *oldtags, *newtags;
516 gst_event_parse_tag (event, &tags);
518 oldtags = selpad->tags;
520 newtags = gst_tag_list_merge (oldtags, tags, GST_TAG_MERGE_REPLACE);
521 selpad->tags = newtags;
523 gst_tag_list_unref (oldtags);
524 GST_DEBUG_OBJECT (pad, "received tags %" GST_PTR_FORMAT, newtags);
533 selpad->eos_sent = TRUE;
535 GstSelectorPad *active_selpad;
537 /* If the active sinkpad is in EOS state but EOS
538 * was not sent downstream this means that the pad
539 * got EOS before it was set as active pad and that
540 * the previously active pad got EOS after it was
543 active_selpad = GST_SELECTOR_PAD (active_sinkpad);
544 forward = (active_selpad->eos && !active_selpad->eos_sent);
545 active_selpad->eos_sent = TRUE;
547 GST_DEBUG_OBJECT (pad, "received EOS");
552 GST_INPUT_SELECTOR_UNLOCK (sel);
554 g_object_notify (G_OBJECT (selpad), "tags");
556 GST_DEBUG_OBJECT (pad, "forwarding event");
557 res = gst_pad_push_event (sel->srcpad, event);
559 /* If we aren't forwarding the event because the pad is not the
560 * active_sinkpad, then set the flag on the pad
561 * that says a segment needs sending if/when that pad is activated.
562 * For all other cases, we send the event immediately, which makes
563 * sparse streams and other segment updates work correctly downstream.
565 if (GST_EVENT_IS_STICKY (event))
566 selpad->events_pending = TRUE;
567 gst_event_unref (event);
574 gst_selector_pad_query (GstPad * pad, GstObject * parent, GstQuery * query)
576 gboolean res = FALSE;
578 switch (GST_QUERY_TYPE (query)) {
579 case GST_QUERY_ALLOCATION:{
580 GstPad *active_sinkpad;
581 GstInputSelector *sel = GST_INPUT_SELECTOR (parent);
583 /* Only do the allocation query for the active sinkpad,
584 * after switching a reconfigure event is sent and upstream
585 * should reconfigure and do a new allocation query
587 if (GST_PAD_DIRECTION (pad) == GST_PAD_SINK) {
588 GST_INPUT_SELECTOR_LOCK (sel);
589 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
590 GST_INPUT_SELECTOR_UNLOCK (sel);
592 if (pad != active_sinkpad) {
600 res = gst_pad_query_default (pad, parent, query);
608 /* must be called with the SELECTOR_LOCK, will block while the pad is blocked
609 * or return TRUE when flushing */
611 gst_input_selector_wait (GstInputSelector * self, GstSelectorPad * pad)
613 while (self->blocked && !self->flushing && !pad->flushing) {
614 /* we can be unlocked here when we are shutting down (flushing) or when we
616 GST_INPUT_SELECTOR_WAIT (self);
618 return self->flushing;
621 /* must be called without the SELECTOR_LOCK, will wait until the running time
622 * of the active pad is after this pad or return TRUE when flushing */
624 gst_input_selector_wait_running_time (GstInputSelector * sel,
625 GstSelectorPad * selpad, GstBuffer * buf)
629 GST_DEBUG_OBJECT (selpad, "entering wait for buffer %p", buf);
631 /* If we have no valid timestamp we can't sync this buffer */
632 if (!GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
633 GST_DEBUG_OBJECT (selpad, "leaving wait for buffer with "
634 "invalid timestamp");
638 seg = &selpad->segment;
641 * a) this is the active pad
642 * b) the pad or the selector is flushing
643 * c) the selector is not blocked
644 * d) the buffer running time is before the current running time
645 * (either active-seg or clock, depending on sync-mode)
648 GST_INPUT_SELECTOR_LOCK (sel);
650 GstPad *active_sinkpad;
651 GstSelectorPad *active_selpad;
653 gint64 cur_running_time;
654 GstClockTime running_time;
657 gst_input_selector_activate_sinkpad (sel, GST_PAD_CAST (selpad));
658 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
660 if (seg->format != GST_FORMAT_TIME) {
661 GST_DEBUG_OBJECT (selpad,
662 "Not waiting because we don't have a TIME segment");
663 GST_INPUT_SELECTOR_UNLOCK (sel);
667 running_time = GST_BUFFER_TIMESTAMP (buf);
668 /* If possible try to get the running time at the end of the buffer */
669 if (GST_BUFFER_DURATION_IS_VALID (buf))
670 running_time += GST_BUFFER_DURATION (buf);
671 /* Only use the segment to convert to running time if the segment is
672 * in TIME format, otherwise do our best to try to sync */
673 if (GST_CLOCK_TIME_IS_VALID (seg->stop)) {
674 if (running_time > seg->stop) {
675 running_time = seg->stop;
679 gst_segment_to_running_time (seg, GST_FORMAT_TIME, running_time);
680 /* If this is outside the segment don't sync */
681 if (running_time == -1) {
682 GST_DEBUG_OBJECT (selpad,
683 "Not waiting because buffer is outside segment");
684 GST_INPUT_SELECTOR_UNLOCK (sel);
688 cur_running_time = GST_CLOCK_TIME_NONE;
689 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
690 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
692 GstClockTime base_time;
694 cur_running_time = gst_clock_get_time (clock);
695 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
696 if (base_time <= cur_running_time)
697 cur_running_time -= base_time;
699 cur_running_time = 0;
701 gst_object_unref (clock);
704 GstSegment *active_seg;
706 active_seg = &active_selpad->segment;
708 /* If the active segment is configured but not to time format
709 * we can't do any syncing at all */
710 if (active_seg->format != GST_FORMAT_TIME
711 && active_seg->format != GST_FORMAT_UNDEFINED) {
712 GST_DEBUG_OBJECT (selpad,
713 "Not waiting because active segment isn't in TIME format");
714 GST_INPUT_SELECTOR_UNLOCK (sel);
718 /* Get active pad's running time, if no configured segment yet keep at -1 */
719 if (active_seg->format == GST_FORMAT_TIME)
720 cur_running_time = gst_segment_to_running_time (active_seg,
721 GST_FORMAT_TIME, active_seg->position);
724 if (selpad != active_selpad && !sel->flushing && !selpad->flushing &&
725 (sel->blocked || cur_running_time == -1
726 || running_time >= cur_running_time)) {
728 GST_DEBUG_OBJECT (selpad,
729 "Waiting for active streams to advance. %" GST_TIME_FORMAT " >= %"
730 GST_TIME_FORMAT, GST_TIME_ARGS (running_time),
731 GST_TIME_ARGS (cur_running_time));
733 GST_DEBUG_OBJECT (selpad, "Waiting for selector to unblock");
735 GST_INPUT_SELECTOR_WAIT (sel);
737 GST_INPUT_SELECTOR_UNLOCK (sel);
742 /* Return TRUE if the selector or the pad is flushing */
743 return (sel->flushing || selpad->flushing);
747 forward_sticky_events (GstPad * sinkpad, GstEvent ** event, gpointer user_data)
749 GstInputSelector *sel = GST_INPUT_SELECTOR (user_data);
751 if (GST_EVENT_TYPE (*event) == GST_EVENT_SEGMENT) {
752 GstSegment *seg = &GST_SELECTOR_PAD (sinkpad)->segment;
755 e = gst_event_new_segment (seg);
756 gst_event_set_seqnum (e, GST_SELECTOR_PAD_CAST (sinkpad)->segment_seqnum);
758 gst_pad_push_event (sel->srcpad, e);
760 gst_pad_push_event (sel->srcpad, gst_event_ref (*event));
766 #if DEBUG_CACHED_BUFFERS
768 gst_input_selector_debug_cached_buffers (GstInputSelector * sel)
772 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
773 GstSelectorPad *selpad;
778 selpad = GST_SELECTOR_PAD_CAST (walk->data);
779 if (!selpad->cached_buffers) {
780 GST_DEBUG_OBJECT (selpad, "Cached buffers timestamps: <none>");
784 timestamps = g_string_new ("Cached buffers timestamps:");
785 for (i = 0; i < selpad->cached_buffers->length; ++i) {
786 GstSelectorPadCachedBuffer *cached_buffer;
788 cached_buffer = g_queue_peek_nth (selpad->cached_buffers, i);
789 g_string_append_printf (timestamps, " %" GST_TIME_FORMAT,
790 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (cached_buffer->buffer)));
792 str = g_string_free (timestamps, FALSE);
793 GST_DEBUG_OBJECT (selpad, str);
799 /* must be called with the SELECTOR_LOCK */
801 gst_input_selector_cleanup_old_cached_buffers (GstInputSelector * sel,
805 gint64 cur_running_time;
808 cur_running_time = GST_CLOCK_TIME_NONE;
809 if (sel->sync_mode == GST_INPUT_SELECTOR_SYNC_MODE_CLOCK) {
810 clock = gst_element_get_clock (GST_ELEMENT_CAST (sel));
812 GstClockTime base_time;
814 cur_running_time = gst_clock_get_time (clock);
815 base_time = gst_element_get_base_time (GST_ELEMENT_CAST (sel));
816 if (base_time <= cur_running_time)
817 cur_running_time -= base_time;
819 cur_running_time = 0;
821 gst_object_unref (clock);
824 GstPad *active_sinkpad;
825 GstSelectorPad *active_selpad;
826 GstSegment *active_seg;
828 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
829 active_selpad = GST_SELECTOR_PAD_CAST (active_sinkpad);
830 active_seg = &active_selpad->segment;
832 /* Get active pad's running time, if no configured segment yet keep at -1 */
833 if (active_seg->format == GST_FORMAT_TIME)
834 cur_running_time = gst_segment_to_running_time (active_seg,
835 GST_FORMAT_TIME, active_seg->position);
838 if (!GST_CLOCK_TIME_IS_VALID (cur_running_time))
841 GST_DEBUG_OBJECT (sel, "Cleaning up old cached buffers");
842 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
843 GstSelectorPad *selpad;
845 GstSelectorPadCachedBuffer *cached_buffer;
846 GSList *maybe_remove;
847 guint queue_position;
849 selpad = GST_SELECTOR_PAD_CAST (walk->data);
850 if (!selpad->cached_buffers)
853 seg = &selpad->segment;
857 while ((cached_buffer = g_queue_peek_nth (selpad->cached_buffers,
859 GstBuffer *buffer = cached_buffer->buffer;
860 GstClockTime running_time;
863 /* If we have no valid timestamp we can't sync this buffer */
864 if (!GST_BUFFER_TIMESTAMP_IS_VALID (buffer)) {
865 maybe_remove = g_slist_append (maybe_remove, cached_buffer);
866 queue_position = g_slist_length (maybe_remove);
870 /* the buffer is still valid if its duration is valid and the
871 * timestamp + duration is >= time, or if its duration is invalid
872 * and the timestamp is >= time */
873 running_time = GST_BUFFER_TIMESTAMP (buffer);
874 /* If possible try to get the running time at the end of the buffer */
875 if (GST_BUFFER_DURATION_IS_VALID (buffer))
876 running_time += GST_BUFFER_DURATION (buffer);
877 /* Only use the segment to convert to running time if the segment is
878 * in TIME format, otherwise do our best to try to sync */
879 if (GST_CLOCK_TIME_IS_VALID (seg->stop)) {
880 if (running_time > seg->stop) {
881 running_time = seg->stop;
885 gst_segment_to_running_time (seg, GST_FORMAT_TIME, running_time);
887 GST_DEBUG_OBJECT (selpad,
888 "checking if buffer %p running time=%" GST_TIME_FORMAT
889 " >= stream time=%" GST_TIME_FORMAT, buffer,
890 GST_TIME_ARGS (running_time), GST_TIME_ARGS (cur_running_time));
891 if (running_time >= cur_running_time) {
895 GST_DEBUG_OBJECT (selpad, "Removing old cached buffer %p", buffer);
896 g_queue_pop_nth (selpad->cached_buffers, queue_position);
897 gst_selector_pad_free_cached_buffer (cached_buffer);
899 for (l = maybe_remove; l != NULL; l = g_slist_next (l)) {
900 /* A buffer after some invalid buffers was removed, it means the invalid buffers
901 * are old, lets also remove them */
902 cached_buffer = l->data;
903 g_queue_remove (selpad->cached_buffers, cached_buffer);
904 gst_selector_pad_free_cached_buffer (cached_buffer);
907 g_slist_free (maybe_remove);
912 g_slist_free (maybe_remove);
915 if (g_queue_is_empty (selpad->cached_buffers)) {
916 g_queue_free (selpad->cached_buffers);
917 selpad->cached_buffers = NULL;
921 #if DEBUG_CACHED_BUFFERS
922 gst_input_selector_debug_cached_buffers (sel);
927 gst_selector_pad_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
929 GstInputSelector *sel;
931 GstPad *active_sinkpad;
932 GstPad *prev_active_sinkpad = NULL;
933 GstSelectorPad *selpad;
934 GstClockTime start_time;
936 sel = GST_INPUT_SELECTOR (parent);
937 selpad = GST_SELECTOR_PAD_CAST (pad);
939 GST_DEBUG_OBJECT (selpad,
940 "entering chain for buf %p with timestamp %" GST_TIME_FORMAT, buf,
941 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
943 GST_INPUT_SELECTOR_LOCK (sel);
944 /* wait or check for flushing */
945 if (gst_input_selector_wait (sel, selpad)) {
946 GST_INPUT_SELECTOR_UNLOCK (sel);
950 GST_LOG_OBJECT (pad, "getting active pad");
952 prev_active_sinkpad =
953 sel->active_sinkpad ? gst_object_ref (sel->active_sinkpad) : NULL;
954 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
956 /* In sync mode wait until the active pad has advanced
957 * after the running time of the current buffer */
958 if (sel->sync_streams) {
959 /* call chain for each cached buffer if we are not the active pad
960 * or if we are the active pad but didn't push anything yet. */
961 if (active_sinkpad != pad || !selpad->pushed) {
962 /* no need to check for sel->cache_buffers as selpad->cached_buffers
963 * will only be valid if cache_buffers is TRUE */
964 if (selpad->cached_buffers && !selpad->sending_cached_buffers) {
965 GstSelectorPadCachedBuffer *cached_buffer;
966 GstSegment saved_segment;
968 saved_segment = selpad->segment;
970 selpad->sending_cached_buffers = TRUE;
971 while (!sel->flushing && !selpad->flushing &&
972 (cached_buffer = g_queue_pop_head (selpad->cached_buffers))) {
973 GST_DEBUG_OBJECT (pad, "Cached buffers found, "
974 "invoking chain for cached buffer %p", cached_buffer->buffer);
976 selpad->segment = cached_buffer->segment;
977 selpad->events_pending = TRUE;
978 GST_INPUT_SELECTOR_UNLOCK (sel);
979 gst_selector_pad_chain (pad, parent, cached_buffer->buffer);
980 GST_INPUT_SELECTOR_LOCK (sel);
982 /* we may have cleaned up the queue in the meantime because of
984 if (!selpad->cached_buffers) {
988 selpad->sending_cached_buffers = FALSE;
990 /* all cached buffers sent, restore segment for current buffer */
991 selpad->segment = saved_segment;
992 selpad->events_pending = TRUE;
994 /* Might have changed while calling chain for cached buffers */
995 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
999 if (active_sinkpad != pad) {
1000 GST_INPUT_SELECTOR_UNLOCK (sel);
1001 if (gst_input_selector_wait_running_time (sel, selpad, buf))
1003 GST_INPUT_SELECTOR_LOCK (sel);
1006 /* Might have changed while waiting */
1007 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
1010 /* update the segment on the srcpad */
1011 start_time = GST_BUFFER_TIMESTAMP (buf);
1012 if (GST_CLOCK_TIME_IS_VALID (start_time)) {
1013 GST_LOG_OBJECT (pad, "received start time %" GST_TIME_FORMAT,
1014 GST_TIME_ARGS (start_time));
1015 if (GST_BUFFER_DURATION_IS_VALID (buf))
1016 GST_LOG_OBJECT (pad, "received end time %" GST_TIME_FORMAT,
1017 GST_TIME_ARGS (start_time + GST_BUFFER_DURATION (buf)));
1019 GST_OBJECT_LOCK (pad);
1020 selpad->position = start_time;
1021 selpad->segment.position = start_time;
1022 GST_OBJECT_UNLOCK (pad);
1025 /* Ignore buffers from pads except the selected one */
1026 if (pad != active_sinkpad)
1029 /* Tell all non-active pads that we advanced the running time */
1030 if (sel->sync_streams)
1031 GST_INPUT_SELECTOR_BROADCAST (sel);
1033 GST_INPUT_SELECTOR_UNLOCK (sel);
1035 if (prev_active_sinkpad != active_sinkpad && pad == active_sinkpad) {
1036 if (prev_active_sinkpad)
1037 g_object_notify (G_OBJECT (prev_active_sinkpad), "active");
1038 g_object_notify (G_OBJECT (active_sinkpad), "active");
1039 g_object_notify (G_OBJECT (sel), "active-pad");
1042 /* if we have a pending events, push them now */
1043 if (G_UNLIKELY (prev_active_sinkpad != active_sinkpad
1044 || selpad->events_pending)) {
1045 gst_pad_sticky_events_foreach (GST_PAD_CAST (selpad), forward_sticky_events,
1047 selpad->events_pending = FALSE;
1050 if (prev_active_sinkpad)
1051 gst_object_unref (prev_active_sinkpad);
1052 prev_active_sinkpad = NULL;
1054 if (selpad->discont) {
1055 buf = gst_buffer_make_writable (buf);
1057 GST_DEBUG_OBJECT (pad, "Marking discont buffer %p", buf);
1058 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
1059 selpad->discont = FALSE;
1063 GST_LOG_OBJECT (pad, "Forwarding buffer %p with timestamp %" GST_TIME_FORMAT,
1064 buf, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
1066 /* Only make the buffer read-only when necessary */
1067 if (sel->sync_streams && sel->cache_buffers)
1068 buf = gst_buffer_ref (buf);
1069 res = gst_pad_push (sel->srcpad, buf);
1070 GST_LOG_OBJECT (pad, "Buffer %p forwarded result=%d", buf, res);
1072 GST_INPUT_SELECTOR_LOCK (sel);
1074 if (sel->sync_streams && sel->cache_buffers) {
1075 /* Might have changed while pushing */
1076 active_sinkpad = gst_input_selector_activate_sinkpad (sel, pad);
1077 /* only set pad to pushed if we are still the active pad */
1078 if (active_sinkpad == pad)
1079 selpad->pushed = TRUE;
1081 /* cache buffer as we may need it again if we change pads */
1082 gst_selector_pad_cache_buffer (selpad, buf);
1083 gst_input_selector_cleanup_old_cached_buffers (sel, pad);
1085 selpad->pushed = TRUE;
1087 GST_INPUT_SELECTOR_UNLOCK (sel);
1091 if (prev_active_sinkpad)
1092 gst_object_unref (prev_active_sinkpad);
1093 prev_active_sinkpad = NULL;
1097 /* dropped buffers */
1100 gboolean active_pad_pushed = GST_SELECTOR_PAD_CAST (active_sinkpad)->pushed;
1102 GST_DEBUG_OBJECT (pad, "Pad not active, discard buffer %p", buf);
1103 /* when we drop a buffer, we're creating a discont on this pad */
1104 selpad->discont = TRUE;
1105 GST_INPUT_SELECTOR_UNLOCK (sel);
1106 gst_buffer_unref (buf);
1108 /* figure out what to return upstream */
1109 GST_OBJECT_LOCK (selpad);
1110 if (selpad->always_ok || !active_pad_pushed)
1113 res = GST_FLOW_NOT_LINKED;
1114 GST_OBJECT_UNLOCK (selpad);
1120 GST_DEBUG_OBJECT (pad, "We are flushing, discard buffer %p", buf);
1121 gst_buffer_unref (buf);
1122 res = GST_FLOW_FLUSHING;
1127 static void gst_input_selector_dispose (GObject * object);
1128 static void gst_input_selector_finalize (GObject * object);
1130 static void gst_input_selector_set_property (GObject * object,
1131 guint prop_id, const GValue * value, GParamSpec * pspec);
1132 static void gst_input_selector_get_property (GObject * object,
1133 guint prop_id, GValue * value, GParamSpec * pspec);
1135 static GstPad *gst_input_selector_request_new_pad (GstElement * element,
1136 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps);
1137 static void gst_input_selector_release_pad (GstElement * element, GstPad * pad);
1139 static GstStateChangeReturn gst_input_selector_change_state (GstElement *
1140 element, GstStateChange transition);
1142 static gboolean gst_input_selector_event (GstPad * pad, GstObject * parent,
1144 static gboolean gst_input_selector_query (GstPad * pad, GstObject * parent,
1146 static gint64 gst_input_selector_block (GstInputSelector * self);
1149 GST_DEBUG_CATEGORY_INIT (input_selector_debug, \
1150 "input-selector", 0, "An input stream selector element");
1151 #define gst_input_selector_parent_class parent_class
1152 G_DEFINE_TYPE_WITH_CODE (GstInputSelector, gst_input_selector, GST_TYPE_ELEMENT,
1156 gst_input_selector_class_init (GstInputSelectorClass * klass)
1158 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
1159 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
1161 gobject_class->dispose = gst_input_selector_dispose;
1162 gobject_class->finalize = gst_input_selector_finalize;
1164 gobject_class->set_property = gst_input_selector_set_property;
1165 gobject_class->get_property = gst_input_selector_get_property;
1167 g_object_class_install_property (gobject_class, PROP_N_PADS,
1168 g_param_spec_uint ("n-pads", "Number of Pads",
1169 "The number of sink pads", 0, G_MAXUINT, 0,
1170 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
1172 g_object_class_install_property (gobject_class, PROP_ACTIVE_PAD,
1173 g_param_spec_object ("active-pad", "Active pad",
1174 "The currently active sink pad", GST_TYPE_PAD,
1175 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
1178 * GstInputSelector:sync-streams
1180 * If set to %TRUE all inactive streams will be synced to the
1181 * running time of the active stream or to the current clock.
1183 * To make sure no buffers are dropped by input-selector
1184 * that might be needed when switching the active pad,
1185 * sync-mode should be set to "clock" and cache-buffers to TRUE.
1187 g_object_class_install_property (gobject_class, PROP_SYNC_STREAMS,
1188 g_param_spec_boolean ("sync-streams", "Sync Streams",
1189 "Synchronize inactive streams to the running time of the active "
1190 "stream or to the current clock",
1191 DEFAULT_SYNC_STREAMS,
1192 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1193 GST_PARAM_MUTABLE_READY));
1196 * GstInputSelector:sync-mode
1198 * Select how input-selector will sync buffers when in sync-streams mode.
1200 * Note that when using the "active-segment" mode, the "active-segment" may
1201 * be ahead of current clock time when switching the active pad, as the current
1202 * active pad may have pushed more buffers than what was displayed/consumed,
1203 * which may cause delays and some missing buffers.
1205 g_object_class_install_property (gobject_class, PROP_SYNC_MODE,
1206 g_param_spec_enum ("sync-mode", "Sync mode",
1207 "Behavior in sync-streams mode", GST_TYPE_INPUT_SELECTOR_SYNC_MODE,
1209 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1210 GST_PARAM_MUTABLE_READY));
1213 * GstInputSelector:cache-buffers
1215 * If set to %TRUE and GstInputSelector:sync-streams is also set to %TRUE,
1216 * the active pad will cache the buffers still considered valid (after current
1217 * running time, see sync-mode) to avoid missing frames if/when the pad is
1220 * The active pad may push more buffers than what is currently displayed/consumed
1221 * and when changing pads those buffers will be discarded and the only way to
1222 * reactivate that pad without loosing the already consumed buffers is to enable cache.
1224 g_object_class_install_property (gobject_class, PROP_CACHE_BUFFERS,
1225 g_param_spec_boolean ("cache-buffers", "Cache Buffers",
1226 "Cache buffers for active-pad",
1227 DEFAULT_CACHE_BUFFERS,
1228 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
1229 GST_PARAM_MUTABLE_READY));
1232 * GstInputSelector::block:
1233 * @inputselector: the #GstInputSelector
1235 * Block all sink pads in preparation for a switch. Returns the stop time of
1236 * the current switch segment, as a running time, or 0 if there is no current
1237 * active pad or the current active pad never received data.
1239 gst_input_selector_signals[SIGNAL_BLOCK] =
1240 g_signal_new ("block", G_TYPE_FROM_CLASS (klass),
1241 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1242 G_STRUCT_OFFSET (GstInputSelectorClass, block), NULL, NULL,
1243 g_cclosure_marshal_generic, G_TYPE_INT64, 0);
1245 gst_element_class_set_static_metadata (gstelement_class, "Input selector",
1246 "Generic", "N-to-1 input stream selector",
1247 "Julien Moutte <julien@moutte.net>, "
1248 "Jan Schmidt <thaytan@mad.scientist.com>, "
1249 "Wim Taymans <wim.taymans@gmail.com>");
1250 gst_element_class_add_pad_template (gstelement_class,
1251 gst_static_pad_template_get (&gst_input_selector_sink_factory));
1252 gst_element_class_add_pad_template (gstelement_class,
1253 gst_static_pad_template_get (&gst_input_selector_src_factory));
1255 gstelement_class->request_new_pad = gst_input_selector_request_new_pad;
1256 gstelement_class->release_pad = gst_input_selector_release_pad;
1257 gstelement_class->change_state = gst_input_selector_change_state;
1259 klass->block = GST_DEBUG_FUNCPTR (gst_input_selector_block);
1263 gst_input_selector_init (GstInputSelector * sel)
1265 sel->srcpad = gst_pad_new ("src", GST_PAD_SRC);
1266 gst_pad_set_iterate_internal_links_function (sel->srcpad,
1267 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1268 gst_pad_set_query_function (sel->srcpad,
1269 GST_DEBUG_FUNCPTR (gst_input_selector_query));
1270 gst_pad_set_event_function (sel->srcpad,
1271 GST_DEBUG_FUNCPTR (gst_input_selector_event));
1272 GST_OBJECT_FLAG_SET (sel->srcpad, GST_PAD_FLAG_PROXY_CAPS);
1273 gst_element_add_pad (GST_ELEMENT (sel), sel->srcpad);
1274 /* sinkpad management */
1275 sel->active_sinkpad = NULL;
1277 sel->sync_streams = DEFAULT_SYNC_STREAMS;
1279 g_mutex_init (&sel->lock);
1280 g_cond_init (&sel->cond);
1281 sel->blocked = FALSE;
1283 /* lets give a change for downstream to do something on
1284 * active-pad change before we start pushing new buffers */
1285 g_signal_connect_data (sel, "notify::active-pad",
1286 (GCallback) gst_input_selector_active_pad_changed, NULL,
1287 NULL, G_CONNECT_AFTER);
1291 gst_input_selector_dispose (GObject * object)
1293 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1295 if (sel->active_sinkpad) {
1296 gst_object_unref (sel->active_sinkpad);
1297 sel->active_sinkpad = NULL;
1299 G_OBJECT_CLASS (parent_class)->dispose (object);
1303 gst_input_selector_finalize (GObject * object)
1305 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1307 g_mutex_clear (&sel->lock);
1308 g_cond_clear (&sel->cond);
1310 G_OBJECT_CLASS (parent_class)->finalize (object);
1313 /* this function must be called with the SELECTOR_LOCK. It returns TRUE when the
1314 * active pad changed. */
1316 gst_input_selector_set_active_pad (GstInputSelector * self, GstPad * pad)
1318 GstSelectorPad *old, *new;
1319 GstPad **active_pad_p;
1321 if (pad == self->active_sinkpad)
1324 old = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
1325 new = GST_SELECTOR_PAD_CAST (pad);
1327 GST_DEBUG_OBJECT (self, "setting active pad to %s:%s",
1328 GST_DEBUG_PAD_NAME (new));
1331 old->pushed = FALSE;
1333 new->pushed = FALSE;
1335 /* Send a new SEGMENT event on the new pad next */
1336 if (old != new && new)
1337 new->events_pending = TRUE;
1339 active_pad_p = &self->active_sinkpad;
1340 gst_object_replace ((GstObject **) active_pad_p, GST_OBJECT_CAST (pad));
1342 if (old && old != new)
1343 gst_pad_push_event (GST_PAD_CAST (old), gst_event_new_reconfigure ());
1345 gst_pad_push_event (GST_PAD_CAST (new), gst_event_new_reconfigure ());
1347 GST_DEBUG_OBJECT (self, "New active pad is %" GST_PTR_FORMAT,
1348 self->active_sinkpad);
1354 gst_input_selector_set_property (GObject * object, guint prop_id,
1355 const GValue * value, GParamSpec * pspec)
1357 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1360 case PROP_ACTIVE_PAD:
1364 pad = g_value_get_object (value);
1366 GST_INPUT_SELECTOR_LOCK (sel);
1368 #if DEBUG_CACHED_BUFFERS
1369 gst_input_selector_debug_cached_buffers (sel);
1372 gst_input_selector_set_active_pad (sel, pad);
1374 #if DEBUG_CACHED_BUFFERS
1375 gst_input_selector_debug_cached_buffers (sel);
1378 GST_INPUT_SELECTOR_UNLOCK (sel);
1381 case PROP_SYNC_STREAMS:
1382 GST_INPUT_SELECTOR_LOCK (sel);
1383 sel->sync_streams = g_value_get_boolean (value);
1384 GST_INPUT_SELECTOR_UNLOCK (sel);
1386 case PROP_SYNC_MODE:
1387 GST_INPUT_SELECTOR_LOCK (sel);
1388 sel->sync_mode = g_value_get_enum (value);
1389 GST_INPUT_SELECTOR_UNLOCK (sel);
1391 case PROP_CACHE_BUFFERS:
1392 GST_INPUT_SELECTOR_LOCK (object);
1393 sel->cache_buffers = g_value_get_boolean (value);
1394 GST_INPUT_SELECTOR_UNLOCK (object);
1397 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1403 gst_input_selector_active_pad_changed (GstInputSelector * sel,
1404 GParamSpec * pspec, gpointer user_data)
1406 /* Wake up all non-active pads in sync mode, they might be
1407 * the active pad now */
1408 if (sel->sync_streams)
1409 GST_INPUT_SELECTOR_BROADCAST (sel);
1413 gst_input_selector_get_property (GObject * object, guint prop_id,
1414 GValue * value, GParamSpec * pspec)
1416 GstInputSelector *sel = GST_INPUT_SELECTOR (object);
1420 GST_INPUT_SELECTOR_LOCK (object);
1421 g_value_set_uint (value, sel->n_pads);
1422 GST_INPUT_SELECTOR_UNLOCK (object);
1424 case PROP_ACTIVE_PAD:
1425 GST_INPUT_SELECTOR_LOCK (object);
1426 g_value_set_object (value, sel->active_sinkpad);
1427 GST_INPUT_SELECTOR_UNLOCK (object);
1429 case PROP_SYNC_STREAMS:
1430 GST_INPUT_SELECTOR_LOCK (object);
1431 g_value_set_boolean (value, sel->sync_streams);
1432 GST_INPUT_SELECTOR_UNLOCK (object);
1434 case PROP_SYNC_MODE:
1435 GST_INPUT_SELECTOR_LOCK (object);
1436 g_value_set_enum (value, sel->sync_mode);
1437 GST_INPUT_SELECTOR_UNLOCK (object);
1439 case PROP_CACHE_BUFFERS:
1440 GST_INPUT_SELECTOR_LOCK (object);
1441 g_value_set_boolean (value, sel->cache_buffers);
1442 GST_INPUT_SELECTOR_UNLOCK (object);
1445 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1451 gst_input_selector_get_linked_pad (GstInputSelector * sel, GstPad * pad,
1454 GstPad *otherpad = NULL;
1456 GST_INPUT_SELECTOR_LOCK (sel);
1457 if (pad == sel->srcpad)
1458 otherpad = sel->active_sinkpad;
1459 else if (pad == sel->active_sinkpad || !strict)
1460 otherpad = sel->srcpad;
1462 gst_object_ref (otherpad);
1463 GST_INPUT_SELECTOR_UNLOCK (sel);
1469 gst_input_selector_event (GstPad * pad, GstObject * parent, GstEvent * event)
1471 GstInputSelector *sel;
1472 gboolean result = FALSE;
1474 gboolean done = FALSE;
1475 GValue item = { 0, };
1477 GList *pushed_pads = NULL;
1479 sel = GST_INPUT_SELECTOR (parent);
1480 /* Send upstream events to all sinkpads */
1481 iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1483 /* This is now essentially a copy of gst_pad_event_default_dispatch
1484 * with a different iterator */
1486 switch (gst_iterator_next (iter, &item)) {
1487 case GST_ITERATOR_OK:
1488 eventpad = g_value_get_object (&item);
1490 /* if already pushed, skip */
1491 if (g_list_find (pushed_pads, eventpad)) {
1492 g_value_reset (&item);
1496 gst_event_ref (event);
1497 result |= gst_pad_push_event (eventpad, event);
1499 g_value_reset (&item);
1501 case GST_ITERATOR_RESYNC:
1502 /* We don't reset the result here because we don't push the event
1503 * again on pads that got the event already and because we need
1504 * to consider the result of the previous pushes */
1505 gst_iterator_resync (iter);
1507 case GST_ITERATOR_ERROR:
1508 GST_ERROR_OBJECT (pad, "Could not iterate over sinkpads");
1511 case GST_ITERATOR_DONE:
1516 g_value_unset (&item);
1517 gst_iterator_free (iter);
1519 g_list_free (pushed_pads);
1521 gst_event_unref (event);
1526 /* query on the srcpad. We override this function because by default it will
1527 * only forward the query to one random sinkpad */
1529 gst_input_selector_query (GstPad * pad, GstObject * parent, GstQuery * query)
1531 gboolean res = FALSE;
1532 GstInputSelector *sel;
1534 sel = GST_INPUT_SELECTOR (parent);
1536 switch (GST_QUERY_TYPE (query)) {
1537 case GST_QUERY_LATENCY:
1540 GstClockTime resmin, resmax;
1547 /* perform the query on all sinkpads and combine the results. We take the
1548 * max of min and the min of max for the result latency. */
1549 GST_INPUT_SELECTOR_LOCK (sel);
1550 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk;
1551 walk = g_list_next (walk)) {
1552 GstPad *sinkpad = GST_PAD_CAST (walk->data);
1554 if (gst_pad_peer_query (sinkpad, query)) {
1555 GstClockTime min, max;
1558 /* one query succeeded, we succeed too */
1561 gst_query_parse_latency (query, &live, &min, &max);
1563 GST_DEBUG_OBJECT (sinkpad,
1564 "peer latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
1565 ", live %d", GST_TIME_ARGS (min), GST_TIME_ARGS (max), live);
1572 else if (max < resmax)
1574 if (reslive == FALSE)
1579 GST_INPUT_SELECTOR_UNLOCK (sel);
1581 gst_query_set_latency (query, reslive, resmin, resmax);
1583 GST_DEBUG_OBJECT (sel,
1584 "total latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
1585 ", live %d", GST_TIME_ARGS (resmin), GST_TIME_ARGS (resmax),
1592 res = gst_pad_query_default (pad, parent, query);
1599 /* check if the pad is the active sinkpad */
1600 static inline gboolean
1601 gst_input_selector_is_active_sinkpad (GstInputSelector * sel, GstPad * pad)
1605 GST_INPUT_SELECTOR_LOCK (sel);
1606 res = (pad == sel->active_sinkpad);
1607 GST_INPUT_SELECTOR_UNLOCK (sel);
1612 /* Get or create the active sinkpad, must be called with SELECTOR_LOCK */
1614 gst_input_selector_activate_sinkpad (GstInputSelector * sel, GstPad * pad)
1616 GstPad *active_sinkpad;
1617 GstSelectorPad *selpad;
1619 selpad = GST_SELECTOR_PAD_CAST (pad);
1621 selpad->active = TRUE;
1622 active_sinkpad = sel->active_sinkpad;
1623 if (sel->active_sinkpad == NULL) {
1624 GValue item = G_VALUE_INIT;
1625 GstIterator *iter = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (sel));
1626 GstIteratorResult ires;
1628 while ((ires = gst_iterator_next (iter, &item)) == GST_ITERATOR_RESYNC)
1629 gst_iterator_resync (iter);
1630 if (ires == GST_ITERATOR_OK) {
1631 /* If no pad is currently selected, we return the first usable pad to
1632 * guarantee consistency */
1634 active_sinkpad = sel->active_sinkpad = g_value_dup_object (&item);
1635 g_value_reset (&item);
1636 GST_DEBUG_OBJECT (sel, "Activating pad %s:%s",
1637 GST_DEBUG_PAD_NAME (active_sinkpad));
1639 GST_WARNING_OBJECT (sel, "Couldn't find a default sink pad");
1640 gst_iterator_free (iter);
1643 return active_sinkpad;
1647 gst_input_selector_request_new_pad (GstElement * element,
1648 GstPadTemplate * templ, const gchar * unused, const GstCaps * caps)
1650 GstInputSelector *sel;
1652 GstPad *sinkpad = NULL;
1654 g_return_val_if_fail (templ->direction == GST_PAD_SINK, NULL);
1656 sel = GST_INPUT_SELECTOR (element);
1658 GST_INPUT_SELECTOR_LOCK (sel);
1660 GST_LOG_OBJECT (sel, "Creating new pad %d", sel->padcount);
1661 name = g_strdup_printf ("sink_%u", sel->padcount++);
1662 sinkpad = g_object_new (GST_TYPE_SELECTOR_PAD,
1663 "name", name, "direction", templ->direction, "template", templ, NULL);
1668 gst_pad_set_event_function (sinkpad,
1669 GST_DEBUG_FUNCPTR (gst_selector_pad_event));
1670 gst_pad_set_query_function (sinkpad,
1671 GST_DEBUG_FUNCPTR (gst_selector_pad_query));
1672 gst_pad_set_chain_function (sinkpad,
1673 GST_DEBUG_FUNCPTR (gst_selector_pad_chain));
1674 gst_pad_set_iterate_internal_links_function (sinkpad,
1675 GST_DEBUG_FUNCPTR (gst_selector_pad_iterate_linked_pads));
1677 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_CAPS);
1678 GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_ALLOCATION);
1679 gst_pad_set_active (sinkpad, TRUE);
1680 gst_element_add_pad (GST_ELEMENT (sel), sinkpad);
1681 GST_INPUT_SELECTOR_UNLOCK (sel);
1687 gst_input_selector_release_pad (GstElement * element, GstPad * pad)
1689 GstInputSelector *sel;
1691 sel = GST_INPUT_SELECTOR (element);
1692 GST_LOG_OBJECT (sel, "Releasing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1694 GST_INPUT_SELECTOR_LOCK (sel);
1695 /* if the pad was the active pad, makes us select a new one */
1696 if (sel->active_sinkpad == pad) {
1697 GST_DEBUG_OBJECT (sel, "Deactivating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
1698 gst_object_unref (sel->active_sinkpad);
1699 sel->active_sinkpad = NULL;
1703 gst_pad_set_active (pad, FALSE);
1704 gst_element_remove_pad (GST_ELEMENT (sel), pad);
1705 GST_INPUT_SELECTOR_UNLOCK (sel);
1709 gst_input_selector_reset (GstInputSelector * sel)
1713 GST_INPUT_SELECTOR_LOCK (sel);
1714 /* clear active pad */
1715 if (sel->active_sinkpad) {
1716 gst_object_unref (sel->active_sinkpad);
1717 sel->active_sinkpad = NULL;
1719 /* reset each of our sinkpads state */
1720 for (walk = GST_ELEMENT_CAST (sel)->sinkpads; walk; walk = g_list_next (walk)) {
1721 GstSelectorPad *selpad = GST_SELECTOR_PAD_CAST (walk->data);
1723 gst_selector_pad_reset (selpad);
1726 gst_tag_list_unref (selpad->tags);
1727 selpad->tags = NULL;
1730 GST_INPUT_SELECTOR_UNLOCK (sel);
1733 static GstStateChangeReturn
1734 gst_input_selector_change_state (GstElement * element,
1735 GstStateChange transition)
1737 GstInputSelector *self = GST_INPUT_SELECTOR (element);
1738 GstStateChangeReturn result;
1740 switch (transition) {
1741 case GST_STATE_CHANGE_READY_TO_PAUSED:
1742 GST_INPUT_SELECTOR_LOCK (self);
1743 self->blocked = FALSE;
1744 self->flushing = FALSE;
1745 GST_INPUT_SELECTOR_UNLOCK (self);
1747 case GST_STATE_CHANGE_PAUSED_TO_READY:
1748 /* first unlock before we call the parent state change function, which
1749 * tries to acquire the stream lock when going to ready. */
1750 GST_INPUT_SELECTOR_LOCK (self);
1751 self->blocked = FALSE;
1752 self->flushing = TRUE;
1753 GST_INPUT_SELECTOR_BROADCAST (self);
1754 GST_INPUT_SELECTOR_UNLOCK (self);
1760 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1762 switch (transition) {
1763 case GST_STATE_CHANGE_PAUSED_TO_READY:
1764 gst_input_selector_reset (self);
1774 gst_input_selector_block (GstInputSelector * self)
1777 GstSelectorPad *spad;
1779 GST_INPUT_SELECTOR_LOCK (self);
1782 GST_WARNING_OBJECT (self, "switch already blocked");
1784 self->blocked = TRUE;
1785 spad = GST_SELECTOR_PAD_CAST (self->active_sinkpad);
1788 ret = gst_selector_pad_get_running_time (spad);
1790 GST_DEBUG_OBJECT (self, "no active pad while blocking");
1792 GST_INPUT_SELECTOR_UNLOCK (self);