1 /* GStreamer aggregator base class
2 * Copyright (C) 2014 Mathieu Duponchelle <mathieu.duponchelle@opencreed.com>
3 * Copyright (C) 2014 Thibault Saunier <tsaunier@gnome.org>
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
23 * SECTION: gstaggregator
24 * @title: GstAggregator
25 * @short_description: manages a set of pads with the purpose of
26 * aggregating their buffers.
27 * @see_also: gstcollectpads for historical reasons.
29 * Manages a set of pads with the purpose of aggregating their buffers.
30 * Control is given to the subclass when all pads have data.
32 * * Base class for mixers and muxers. Subclasses should at least implement
33 * the #GstAggregatorClass.aggregate() virtual method.
35 * * When data is queued on all pads, tha aggregate vmethod is called.
37 * * One can peek at the data on any given GstAggregatorPad with the
38 * gst_aggregator_pad_get_buffer () method, and take ownership of it
39 * with the gst_aggregator_pad_steal_buffer () method. When a buffer
40 * has been taken with steal_buffer (), a new buffer can be queued
43 * * If the subclass wishes to push a buffer downstream in its aggregate
44 * implementation, it should do so through the
45 * gst_aggregator_finish_buffer () method. This method will take care
46 * of sending and ordering mandatory events such as stream start, caps
49 * * Same goes for EOS events, which should not be pushed directly by the
50 * subclass, it should instead return GST_FLOW_EOS in its aggregate
53 * * Note that the aggregator logic regarding gap event handling is to turn
54 * these into gap buffers with matching PTS and duration. It will also
55 * flag these buffers with GST_BUFFER_FLAG_GAP and GST_BUFFER_FLAG_DROPPABLE
56 * to ease their identification and subsequent processing.
64 #include <string.h> /* strlen */
66 #include "gstaggregator.h"
70 GST_AGGREGATOR_START_TIME_SELECTION_ZERO,
71 GST_AGGREGATOR_START_TIME_SELECTION_FIRST,
72 GST_AGGREGATOR_START_TIME_SELECTION_SET
73 } GstAggregatorStartTimeSelection;
76 gst_aggregator_start_time_selection_get_type (void)
78 static GType gtype = 0;
81 static const GEnumValue values[] = {
82 {GST_AGGREGATOR_START_TIME_SELECTION_ZERO,
83 "Start at 0 running time (default)", "zero"},
84 {GST_AGGREGATOR_START_TIME_SELECTION_FIRST,
85 "Start at first observed input running time", "first"},
86 {GST_AGGREGATOR_START_TIME_SELECTION_SET,
87 "Set start time with start-time property", "set"},
91 gtype = g_enum_register_static ("GstAggregatorStartTimeSelection", values);
96 /* Might become API */
97 static void gst_aggregator_merge_tags (GstAggregator * aggregator,
98 const GstTagList * tags, GstTagMergeMode mode);
99 static void gst_aggregator_set_latency_property (GstAggregator * agg,
101 static gint64 gst_aggregator_get_latency_property (GstAggregator * agg);
104 /* Locking order, locks in this element must always be taken in this order
106 * standard sink pad stream lock -> GST_PAD_STREAM_LOCK (aggpad)
107 * Aggregator pad flush lock -> PAD_FLUSH_LOCK(aggpad)
108 * standard src pad stream lock -> GST_PAD_STREAM_LOCK (srcpad)
109 * Aggregator src lock -> SRC_LOCK(agg) w/ SRC_WAIT/BROADCAST
110 * standard element object lock -> GST_OBJECT_LOCK(agg)
111 * Aggregator pad lock -> PAD_LOCK (aggpad) w/ PAD_WAIT/BROADCAST_EVENT(aggpad)
112 * standard src pad object lock -> GST_OBJECT_LOCK(srcpad)
113 * standard sink pad object lock -> GST_OBJECT_LOCK(aggpad)
117 static GstClockTime gst_aggregator_get_latency_unlocked (GstAggregator * self);
119 GST_DEBUG_CATEGORY_STATIC (aggregator_debug);
120 #define GST_CAT_DEFAULT aggregator_debug
122 /* GstAggregatorPad definitions */
123 #define PAD_LOCK(pad) G_STMT_START { \
124 GST_TRACE_OBJECT (pad, "Taking PAD lock from thread %p", \
126 g_mutex_lock(&pad->priv->lock); \
127 GST_TRACE_OBJECT (pad, "Took PAD lock from thread %p", \
131 #define PAD_UNLOCK(pad) G_STMT_START { \
132 GST_TRACE_OBJECT (pad, "Releasing PAD lock from thread %p", \
134 g_mutex_unlock(&pad->priv->lock); \
135 GST_TRACE_OBJECT (pad, "Release PAD lock from thread %p", \
140 #define PAD_WAIT_EVENT(pad) G_STMT_START { \
141 GST_LOG_OBJECT (pad, "Waiting for buffer to be consumed thread %p", \
143 g_cond_wait(&(((GstAggregatorPad* )pad)->priv->event_cond), \
144 (&((GstAggregatorPad*)pad)->priv->lock)); \
145 GST_LOG_OBJECT (pad, "DONE Waiting for buffer to be consumed on thread %p", \
149 #define PAD_BROADCAST_EVENT(pad) G_STMT_START { \
150 GST_LOG_OBJECT (pad, "Signaling buffer consumed from thread %p", \
152 g_cond_broadcast(&(((GstAggregatorPad* )pad)->priv->event_cond)); \
156 #define PAD_FLUSH_LOCK(pad) G_STMT_START { \
157 GST_TRACE_OBJECT (pad, "Taking lock from thread %p", \
159 g_mutex_lock(&pad->priv->flush_lock); \
160 GST_TRACE_OBJECT (pad, "Took lock from thread %p", \
164 #define PAD_FLUSH_UNLOCK(pad) G_STMT_START { \
165 GST_TRACE_OBJECT (pad, "Releasing lock from thread %p", \
167 g_mutex_unlock(&pad->priv->flush_lock); \
168 GST_TRACE_OBJECT (pad, "Release lock from thread %p", \
172 #define SRC_LOCK(self) G_STMT_START { \
173 GST_TRACE_OBJECT (self, "Taking src lock from thread %p", \
175 g_mutex_lock(&self->priv->src_lock); \
176 GST_TRACE_OBJECT (self, "Took src lock from thread %p", \
180 #define SRC_UNLOCK(self) G_STMT_START { \
181 GST_TRACE_OBJECT (self, "Releasing src lock from thread %p", \
183 g_mutex_unlock(&self->priv->src_lock); \
184 GST_TRACE_OBJECT (self, "Released src lock from thread %p", \
188 #define SRC_WAIT(self) G_STMT_START { \
189 GST_LOG_OBJECT (self, "Waiting for src on thread %p", \
191 g_cond_wait(&(self->priv->src_cond), &(self->priv->src_lock)); \
192 GST_LOG_OBJECT (self, "DONE Waiting for src on thread %p", \
196 #define SRC_BROADCAST(self) G_STMT_START { \
197 GST_LOG_OBJECT (self, "Signaling src from thread %p", \
199 if (self->priv->aggregate_id) \
200 gst_clock_id_unschedule (self->priv->aggregate_id); \
201 g_cond_broadcast(&(self->priv->src_cond)); \
204 struct _GstAggregatorPadPrivate
206 /* Following fields are protected by the PAD_LOCK */
207 GstFlowReturn flow_return;
208 gboolean pending_flush_start;
209 gboolean pending_flush_stop;
210 gboolean pending_eos;
212 gboolean first_buffer;
215 GstBuffer *clipped_buffer;
217 GstClockTime head_position;
218 GstClockTime tail_position;
219 GstClockTime head_time;
220 GstClockTime tail_time;
221 GstClockTime time_level;
222 GstSegment head_segment; /* segment before the queue */
230 /* This lock prevents a flush start processing happening while
231 * the chain function is also happening.
236 /* Must be called with PAD_LOCK held */
238 gst_aggregator_pad_reset_unlocked (GstAggregatorPad * aggpad)
240 aggpad->priv->pending_eos = FALSE;
241 aggpad->priv->eos = FALSE;
242 aggpad->priv->flow_return = GST_FLOW_OK;
243 GST_OBJECT_LOCK (aggpad);
244 gst_segment_init (&aggpad->segment, GST_FORMAT_UNDEFINED);
245 gst_segment_init (&aggpad->priv->head_segment, GST_FORMAT_UNDEFINED);
246 GST_OBJECT_UNLOCK (aggpad);
247 aggpad->priv->head_position = GST_CLOCK_TIME_NONE;
248 aggpad->priv->tail_position = GST_CLOCK_TIME_NONE;
249 aggpad->priv->head_time = GST_CLOCK_TIME_NONE;
250 aggpad->priv->tail_time = GST_CLOCK_TIME_NONE;
251 aggpad->priv->time_level = 0;
252 aggpad->priv->first_buffer = TRUE;
256 gst_aggregator_pad_flush (GstAggregatorPad * aggpad, GstAggregator * agg)
258 GstAggregatorPadClass *klass = GST_AGGREGATOR_PAD_GET_CLASS (aggpad);
261 gst_aggregator_pad_reset_unlocked (aggpad);
265 return klass->flush (aggpad, agg);
270 /*************************************
271 * GstAggregator implementation *
272 *************************************/
273 static GstElementClass *aggregator_parent_class = NULL;
275 /* All members are protected by the object lock unless otherwise noted */
277 struct _GstAggregatorPrivate
281 /* Our state is >= PAUSED */
282 gboolean running; /* protected by src_lock */
285 gboolean send_stream_start; /* protected by srcpad stream lock */
286 gboolean send_segment;
287 gboolean flush_seeking;
288 gboolean pending_flush_start;
289 gboolean send_eos; /* protected by srcpad stream lock */
291 GstCaps *srccaps; /* protected by the srcpad stream lock */
294 gboolean tags_changed;
296 gboolean peer_latency_live; /* protected by src_lock */
297 GstClockTime peer_latency_min; /* protected by src_lock */
298 GstClockTime peer_latency_max; /* protected by src_lock */
299 gboolean has_peer_latency; /* protected by src_lock */
301 GstClockTime sub_latency_min; /* protected by src_lock */
302 GstClockTime sub_latency_max; /* protected by src_lock */
305 GstClockID aggregate_id; /* protected by src_lock */
309 gboolean first_buffer; /* protected by object lock */
310 GstAggregatorStartTimeSelection start_time_selection;
311 GstClockTime start_time;
313 /* protected by the object lock */
314 GstQuery *allocation_query;
315 GstAllocator *allocator;
317 GstAllocationParams allocation_params;
320 gint64 latency; /* protected by both src_lock and all pad locks */
328 gboolean only_to_active_pads;
330 gboolean one_actually_seeked;
333 #define DEFAULT_LATENCY 0
334 #define DEFAULT_START_TIME_SELECTION GST_AGGREGATOR_START_TIME_SELECTION_ZERO
335 #define DEFAULT_START_TIME (-1)
341 PROP_START_TIME_SELECTION,
346 static GstFlowReturn gst_aggregator_pad_chain_internal (GstAggregator * self,
347 GstAggregatorPad * aggpad, GstBuffer * buffer, gboolean head);
350 * gst_aggregator_iterate_sinkpads:
351 * @self: The #GstAggregator
352 * @func: (scope call): The function to call.
353 * @user_data: (closure): The data to pass to @func.
355 * Iterate the sinkpads of aggregator to call a function on them.
357 * This method guarantees that @func will be called only once for each
361 gst_aggregator_iterate_sinkpads (GstAggregator * self,
362 GstAggregatorPadForeachFunc func, gpointer user_data)
364 gboolean result = FALSE;
366 gboolean done = FALSE;
367 GValue item = { 0, };
368 GList *seen_pads = NULL;
370 iter = gst_element_iterate_sink_pads (GST_ELEMENT (self));
376 switch (gst_iterator_next (iter, &item)) {
377 case GST_ITERATOR_OK:
379 GstAggregatorPad *pad;
381 pad = g_value_get_object (&item);
383 /* if already pushed, skip. FIXME, find something faster to tag pads */
384 if (pad == NULL || g_list_find (seen_pads, pad)) {
385 g_value_reset (&item);
389 GST_LOG_OBJECT (pad, "calling function %s on pad",
390 GST_DEBUG_FUNCPTR_NAME (func));
392 result = func (self, pad, user_data);
396 seen_pads = g_list_prepend (seen_pads, pad);
398 g_value_reset (&item);
401 case GST_ITERATOR_RESYNC:
402 gst_iterator_resync (iter);
404 case GST_ITERATOR_ERROR:
405 GST_ERROR_OBJECT (self,
406 "Could not iterate over internally linked pads");
409 case GST_ITERATOR_DONE:
414 g_value_unset (&item);
415 gst_iterator_free (iter);
417 if (seen_pads == NULL) {
418 GST_DEBUG_OBJECT (self, "No pad seen");
422 g_list_free (seen_pads);
429 gst_aggregator_pad_queue_is_empty (GstAggregatorPad * pad)
431 return (g_queue_peek_tail (&pad->priv->buffers) == NULL &&
432 pad->priv->clipped_buffer == NULL);
436 gst_aggregator_check_pads_ready (GstAggregator * self)
438 GstAggregatorPad *pad;
440 gboolean have_buffer = TRUE;
441 gboolean have_event = FALSE;
443 GST_LOG_OBJECT (self, "checking pads");
445 GST_OBJECT_LOCK (self);
447 sinkpads = GST_ELEMENT_CAST (self)->sinkpads;
448 if (sinkpads == NULL)
451 for (l = sinkpads; l != NULL; l = l->next) {
456 if (pad->priv->num_buffers == 0) {
457 if (!gst_aggregator_pad_queue_is_empty (pad))
459 if (!pad->priv->eos) {
462 /* If not live we need data on all pads, so leave the loop */
463 if (!self->priv->peer_latency_live) {
468 } else if (self->priv->peer_latency_live) {
469 /* In live mode, having a single pad with buffers is enough to
470 * generate a start time from it. In non-live mode all pads need
473 self->priv->first_buffer = FALSE;
479 if (!have_buffer && !have_event)
483 self->priv->first_buffer = FALSE;
485 GST_OBJECT_UNLOCK (self);
486 GST_LOG_OBJECT (self, "pads are ready");
491 GST_LOG_OBJECT (self, "pads not ready: no sink pads");
492 GST_OBJECT_UNLOCK (self);
498 GST_LOG_OBJECT (pad, "pad not ready to be aggregated yet,"
499 " but waking up for serialized event");
501 GST_LOG_OBJECT (pad, "pad not ready to be aggregated yet");
502 GST_OBJECT_UNLOCK (self);
508 gst_aggregator_reset_flow_values (GstAggregator * self)
510 GST_OBJECT_LOCK (self);
511 self->priv->send_stream_start = TRUE;
512 self->priv->send_segment = TRUE;
513 gst_segment_init (&self->segment, GST_FORMAT_TIME);
514 self->priv->first_buffer = TRUE;
515 GST_OBJECT_UNLOCK (self);
519 gst_aggregator_push_mandatory_events (GstAggregator * self)
521 GstAggregatorPrivate *priv = self->priv;
522 GstEvent *segment = NULL;
523 GstEvent *tags = NULL;
525 if (self->priv->send_stream_start) {
528 GST_INFO_OBJECT (self, "pushing stream start");
529 /* stream-start (FIXME: create id based on input ids) */
530 g_snprintf (s_id, sizeof (s_id), "agg-%08x", g_random_int ());
531 if (!gst_pad_push_event (self->srcpad, gst_event_new_stream_start (s_id))) {
532 GST_WARNING_OBJECT (self->srcpad, "Sending stream start event failed");
534 self->priv->send_stream_start = FALSE;
537 if (self->priv->srccaps) {
539 GST_INFO_OBJECT (self, "pushing caps: %" GST_PTR_FORMAT,
540 self->priv->srccaps);
541 if (!gst_pad_push_event (self->srcpad,
542 gst_event_new_caps (self->priv->srccaps))) {
543 GST_WARNING_OBJECT (self->srcpad, "Sending caps event failed");
545 gst_caps_unref (self->priv->srccaps);
546 self->priv->srccaps = NULL;
549 GST_OBJECT_LOCK (self);
550 if (self->priv->send_segment && !self->priv->flush_seeking) {
551 segment = gst_event_new_segment (&self->segment);
553 if (!self->priv->seqnum)
554 self->priv->seqnum = gst_event_get_seqnum (segment);
556 gst_event_set_seqnum (segment, self->priv->seqnum);
557 self->priv->send_segment = FALSE;
559 GST_DEBUG_OBJECT (self, "pushing segment %" GST_PTR_FORMAT, segment);
562 if (priv->tags && priv->tags_changed && !self->priv->flush_seeking) {
563 tags = gst_event_new_tag (gst_tag_list_ref (priv->tags));
564 priv->tags_changed = FALSE;
566 GST_OBJECT_UNLOCK (self);
569 gst_pad_push_event (self->srcpad, segment);
571 gst_pad_push_event (self->srcpad, tags);
576 * gst_aggregator_set_src_caps:
577 * @self: The #GstAggregator
578 * @caps: The #GstCaps to set on the src pad.
580 * Sets the caps to be used on the src pad.
583 gst_aggregator_set_src_caps (GstAggregator * self, GstCaps * caps)
585 GST_PAD_STREAM_LOCK (self->srcpad);
586 gst_caps_replace (&self->priv->srccaps, caps);
587 gst_aggregator_push_mandatory_events (self);
588 GST_PAD_STREAM_UNLOCK (self->srcpad);
592 * gst_aggregator_finish_buffer:
593 * @self: The #GstAggregator
594 * @buffer: (transfer full): the #GstBuffer to push.
596 * This method will push the provided output buffer downstream. If needed,
597 * mandatory events such as stream-start, caps, and segment events will be
598 * sent before pushing the buffer.
601 gst_aggregator_finish_buffer (GstAggregator * self, GstBuffer * buffer)
603 gst_aggregator_push_mandatory_events (self);
605 GST_OBJECT_LOCK (self);
606 if (!self->priv->flush_seeking && gst_pad_is_active (self->srcpad)) {
607 GST_TRACE_OBJECT (self, "pushing buffer %" GST_PTR_FORMAT, buffer);
608 GST_OBJECT_UNLOCK (self);
609 return gst_pad_push (self->srcpad, buffer);
611 GST_INFO_OBJECT (self, "Not pushing (active: %i, flushing: %i)",
612 self->priv->flush_seeking, gst_pad_is_active (self->srcpad));
613 GST_OBJECT_UNLOCK (self);
614 gst_buffer_unref (buffer);
620 gst_aggregator_push_eos (GstAggregator * self)
623 gst_aggregator_push_mandatory_events (self);
625 event = gst_event_new_eos ();
627 GST_OBJECT_LOCK (self);
628 self->priv->send_eos = FALSE;
629 gst_event_set_seqnum (event, self->priv->seqnum);
630 GST_OBJECT_UNLOCK (self);
632 gst_pad_push_event (self->srcpad, event);
636 gst_aggregator_get_next_time (GstAggregator * self)
638 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
640 if (klass->get_next_time)
641 return klass->get_next_time (self);
643 return GST_CLOCK_TIME_NONE;
647 gst_aggregator_wait_and_check (GstAggregator * self, gboolean * timeout)
649 GstClockTime latency;
657 latency = gst_aggregator_get_latency_unlocked (self);
659 if (gst_aggregator_check_pads_ready (self)) {
660 GST_DEBUG_OBJECT (self, "all pads have data");
666 /* Before waiting, check if we're actually still running */
667 if (!self->priv->running || !self->priv->send_eos) {
673 start = gst_aggregator_get_next_time (self);
675 /* If we're not live, or if we use the running time
676 * of the first buffer as start time, we wait until
677 * all pads have buffers.
678 * Otherwise (i.e. if we are live!), we wait on the clock
679 * and if a pad does not have a buffer in time we ignore
682 GST_OBJECT_LOCK (self);
683 if (!GST_CLOCK_TIME_IS_VALID (latency) ||
684 !GST_IS_CLOCK (GST_ELEMENT_CLOCK (self)) ||
685 !GST_CLOCK_TIME_IS_VALID (start) ||
686 (self->priv->first_buffer
687 && self->priv->start_time_selection ==
688 GST_AGGREGATOR_START_TIME_SELECTION_FIRST)) {
689 /* We wake up here when something happened, and below
690 * then check if we're ready now. If we return FALSE,
691 * we will be directly called again.
693 GST_OBJECT_UNLOCK (self);
696 GstClockTime base_time, time;
698 GstClockReturn status;
699 GstClockTimeDiff jitter;
701 GST_DEBUG_OBJECT (self, "got subclass start time: %" GST_TIME_FORMAT,
702 GST_TIME_ARGS (start));
704 base_time = GST_ELEMENT_CAST (self)->base_time;
705 clock = gst_object_ref (GST_ELEMENT_CLOCK (self));
706 GST_OBJECT_UNLOCK (self);
708 time = base_time + start;
711 GST_DEBUG_OBJECT (self, "possibly waiting for clock to reach %"
712 GST_TIME_FORMAT " (base %" GST_TIME_FORMAT " start %" GST_TIME_FORMAT
713 " latency %" GST_TIME_FORMAT " current %" GST_TIME_FORMAT ")",
714 GST_TIME_ARGS (time),
715 GST_TIME_ARGS (base_time),
716 GST_TIME_ARGS (start), GST_TIME_ARGS (latency),
717 GST_TIME_ARGS (gst_clock_get_time (clock)));
719 self->priv->aggregate_id = gst_clock_new_single_shot_id (clock, time);
720 gst_object_unref (clock);
724 status = gst_clock_id_wait (self->priv->aggregate_id, &jitter);
727 if (self->priv->aggregate_id) {
728 gst_clock_id_unref (self->priv->aggregate_id);
729 self->priv->aggregate_id = NULL;
732 GST_DEBUG_OBJECT (self,
733 "clock returned %d (jitter: %" GST_STIME_FORMAT ")",
734 status, GST_STIME_ARGS (jitter));
737 if (status == GST_CLOCK_OK || status == GST_CLOCK_EARLY) {
744 res = gst_aggregator_check_pads_ready (self);
751 check_events (GstAggregator * self, GstAggregatorPad * pad, gpointer user_data)
753 GstEvent *event = NULL;
754 GstQuery *query = NULL;
755 GstAggregatorClass *klass = NULL;
756 gboolean *processed_event = user_data;
762 if (pad->priv->num_buffers == 0 && pad->priv->pending_eos) {
763 pad->priv->pending_eos = FALSE;
764 pad->priv->eos = TRUE;
766 if (pad->priv->clipped_buffer == NULL &&
767 !GST_IS_BUFFER (g_queue_peek_tail (&pad->priv->buffers))) {
768 if (GST_IS_EVENT (g_queue_peek_tail (&pad->priv->buffers)))
769 event = gst_event_ref (g_queue_peek_tail (&pad->priv->buffers));
770 if (GST_IS_QUERY (g_queue_peek_tail (&pad->priv->buffers)))
771 query = g_queue_peek_tail (&pad->priv->buffers);
774 if (event || query) {
778 *processed_event = TRUE;
780 klass = GST_AGGREGATOR_GET_CLASS (self);
782 GST_LOG_OBJECT (pad, "Processing %" GST_PTR_FORMAT, event);
785 gst_event_ref (event);
786 ret = klass->sink_event (self, pad, event);
789 if (GST_EVENT_TYPE (event) == GST_EVENT_CAPS)
790 pad->priv->negotiated = ret;
791 if (g_queue_peek_tail (&pad->priv->buffers) == event)
792 gst_event_unref (g_queue_pop_tail (&pad->priv->buffers));
793 gst_event_unref (event);
797 GST_LOG_OBJECT (pad, "Processing %" GST_PTR_FORMAT, event);
798 ret = klass->sink_query (self, pad, query);
801 if (g_queue_peek_tail (&pad->priv->buffers) == query) {
804 s = gst_query_writable_structure (query);
805 gst_structure_set (s, "gst-aggregator-retval", G_TYPE_BOOLEAN, ret,
807 g_queue_pop_tail (&pad->priv->buffers);
811 PAD_BROADCAST_EVENT (pad);
816 *processed_event = TRUE;
818 klass = GST_AGGREGATOR_GET_CLASS (self);
820 } while (event != NULL);
826 gst_aggregator_pad_set_flushing (GstAggregatorPad * aggpad,
827 GstFlowReturn flow_return, gboolean full)
832 if (flow_return == GST_FLOW_NOT_LINKED)
833 aggpad->priv->flow_return = MIN (flow_return, aggpad->priv->flow_return);
835 aggpad->priv->flow_return = flow_return;
837 item = g_queue_peek_head_link (&aggpad->priv->buffers);
839 GList *next = item->next;
841 /* In partial flush, we do like the pad, we get rid of non-sticky events
844 if (full || GST_IS_BUFFER (item->data) ||
845 GST_EVENT_TYPE (item->data) == GST_EVENT_EOS ||
846 GST_EVENT_TYPE (item->data) == GST_EVENT_SEGMENT ||
847 !GST_EVENT_IS_STICKY (item->data)) {
848 if (!GST_IS_QUERY (item->data))
849 gst_mini_object_unref (item->data);
850 g_queue_delete_link (&aggpad->priv->buffers, item);
854 aggpad->priv->num_buffers = 0;
855 gst_buffer_replace (&aggpad->priv->clipped_buffer, NULL);
857 PAD_BROADCAST_EVENT (aggpad);
862 gst_aggregator_default_update_src_caps (GstAggregator * agg, GstCaps * caps,
865 *ret = gst_caps_ref (caps);
871 gst_aggregator_default_fixate_src_caps (GstAggregator * agg, GstCaps * caps)
873 caps = gst_caps_fixate (caps);
879 gst_aggregator_default_negotiated_src_caps (GstAggregator * agg, GstCaps * caps)
885 /* takes ownership of the pool, allocator and query */
887 gst_aggregator_set_allocation (GstAggregator * self,
888 GstBufferPool * pool, GstAllocator * allocator,
889 GstAllocationParams * params, GstQuery * query)
891 GstAllocator *oldalloc;
892 GstBufferPool *oldpool;
895 GST_DEBUG ("storing allocation query");
897 GST_OBJECT_LOCK (self);
898 oldpool = self->priv->pool;
899 self->priv->pool = pool;
901 oldalloc = self->priv->allocator;
902 self->priv->allocator = allocator;
904 oldquery = self->priv->allocation_query;
905 self->priv->allocation_query = query;
908 self->priv->allocation_params = *params;
910 gst_allocation_params_init (&self->priv->allocation_params);
911 GST_OBJECT_UNLOCK (self);
914 GST_DEBUG_OBJECT (self, "deactivating old pool %p", oldpool);
915 gst_buffer_pool_set_active (oldpool, FALSE);
916 gst_object_unref (oldpool);
919 gst_object_unref (oldalloc);
922 gst_query_unref (oldquery);
929 gst_aggregator_decide_allocation (GstAggregator * self, GstQuery * query)
931 GstAggregatorClass *aggclass = GST_AGGREGATOR_GET_CLASS (self);
933 if (aggclass->decide_allocation)
934 if (!aggclass->decide_allocation (self, query))
941 gst_aggregator_do_allocation (GstAggregator * self, GstCaps * caps)
944 gboolean result = TRUE;
945 GstBufferPool *pool = NULL;
946 GstAllocator *allocator;
947 GstAllocationParams params;
949 /* find a pool for the negotiated caps now */
950 GST_DEBUG_OBJECT (self, "doing allocation query");
951 query = gst_query_new_allocation (caps, TRUE);
952 if (!gst_pad_peer_query (self->srcpad, query)) {
953 /* not a problem, just debug a little */
954 GST_DEBUG_OBJECT (self, "peer ALLOCATION query failed");
957 GST_DEBUG_OBJECT (self, "calling decide_allocation");
958 result = gst_aggregator_decide_allocation (self, query);
960 GST_DEBUG_OBJECT (self, "ALLOCATION (%d) params: %" GST_PTR_FORMAT, result,
964 goto no_decide_allocation;
966 /* we got configuration from our peer or the decide_allocation method,
968 if (gst_query_get_n_allocation_params (query) > 0) {
969 gst_query_parse_nth_allocation_param (query, 0, &allocator, ¶ms);
972 gst_allocation_params_init (¶ms);
975 if (gst_query_get_n_allocation_pools (query) > 0)
976 gst_query_parse_nth_allocation_pool (query, 0, &pool, NULL, NULL, NULL);
980 gst_aggregator_set_allocation (self, pool, allocator, ¶ms, query);
985 no_decide_allocation:
987 GST_WARNING_OBJECT (self, "Failed to decide allocation");
988 gst_query_unref (query);
995 /* WITH SRC_LOCK held */
997 gst_aggregator_update_src_caps (GstAggregator * self)
999 GstAggregatorClass *agg_klass = GST_AGGREGATOR_GET_CLASS (self);
1000 GstCaps *downstream_caps, *template_caps, *caps = NULL;
1001 GstFlowReturn ret = GST_FLOW_OK;
1003 template_caps = gst_pad_get_pad_template_caps (self->srcpad);
1004 downstream_caps = gst_pad_peer_query_caps (self->srcpad, template_caps);
1006 if (gst_caps_is_empty (downstream_caps)) {
1007 GST_INFO_OBJECT (self, "Downstream caps (%"
1008 GST_PTR_FORMAT ") not compatible with pad template caps (%"
1009 GST_PTR_FORMAT ")", downstream_caps, template_caps);
1010 ret = GST_FLOW_NOT_NEGOTIATED;
1014 g_assert (agg_klass->update_src_caps);
1015 GST_DEBUG_OBJECT (self, "updating caps from %" GST_PTR_FORMAT,
1017 ret = agg_klass->update_src_caps (self, downstream_caps, &caps);
1018 if (ret < GST_FLOW_OK) {
1019 GST_WARNING_OBJECT (self, "Subclass failed to update provided caps");
1022 if ((caps == NULL || gst_caps_is_empty (caps)) && ret >= GST_FLOW_OK) {
1023 ret = GST_FLOW_NOT_NEGOTIATED;
1026 GST_DEBUG_OBJECT (self, " to %" GST_PTR_FORMAT, caps);
1028 #ifdef GST_ENABLE_EXTRA_CHECKS
1029 if (!gst_caps_is_subset (caps, template_caps)) {
1030 GstCaps *intersection;
1032 GST_ERROR_OBJECT (self,
1033 "update_src_caps returned caps %" GST_PTR_FORMAT
1034 " which are not a real subset of the template caps %"
1035 GST_PTR_FORMAT, caps, template_caps);
1036 g_warning ("%s: update_src_caps returned caps which are not a real "
1037 "subset of the filter caps", GST_ELEMENT_NAME (self));
1040 gst_caps_intersect_full (template_caps, caps, GST_CAPS_INTERSECT_FIRST);
1041 gst_caps_unref (caps);
1042 caps = intersection;
1046 if (gst_caps_is_any (caps)) {
1050 if (!gst_caps_is_fixed (caps)) {
1051 g_assert (agg_klass->fixate_src_caps);
1053 GST_DEBUG_OBJECT (self, "fixate caps from %" GST_PTR_FORMAT, caps);
1054 if (!(caps = agg_klass->fixate_src_caps (self, caps))) {
1055 GST_WARNING_OBJECT (self, "Subclass failed to fixate provided caps");
1056 ret = GST_FLOW_NOT_NEGOTIATED;
1059 GST_DEBUG_OBJECT (self, " to %" GST_PTR_FORMAT, caps);
1062 if (agg_klass->negotiated_src_caps) {
1063 if (!agg_klass->negotiated_src_caps (self, caps)) {
1064 GST_WARNING_OBJECT (self, "Subclass failed to accept negotiated caps");
1065 ret = GST_FLOW_NOT_NEGOTIATED;
1070 gst_aggregator_set_src_caps (self, caps);
1072 if (!gst_aggregator_do_allocation (self, caps)) {
1073 GST_WARNING_OBJECT (self, "Allocation negotiation failed");
1074 ret = GST_FLOW_NOT_NEGOTIATED;
1078 gst_caps_unref (downstream_caps);
1079 gst_caps_unref (template_caps);
1082 gst_caps_unref (caps);
1088 gst_aggregator_aggregate_func (GstAggregator * self)
1090 GstAggregatorPrivate *priv = self->priv;
1091 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
1092 gboolean timeout = FALSE;
1094 if (self->priv->running == FALSE) {
1095 GST_DEBUG_OBJECT (self, "Not running anymore");
1099 GST_LOG_OBJECT (self, "Checking aggregate");
1100 while (priv->send_eos && priv->running) {
1101 GstFlowReturn flow_return = GST_FLOW_OK;
1102 gboolean processed_event = FALSE;
1104 gst_aggregator_iterate_sinkpads (self, check_events, NULL);
1106 if (!gst_aggregator_wait_and_check (self, &timeout))
1109 gst_aggregator_iterate_sinkpads (self, check_events, &processed_event);
1110 if (processed_event)
1113 if (gst_pad_check_reconfigure (GST_AGGREGATOR_SRC_PAD (self))) {
1114 flow_return = gst_aggregator_update_src_caps (self);
1115 if (flow_return != GST_FLOW_OK)
1116 gst_pad_mark_reconfigure (GST_AGGREGATOR_SRC_PAD (self));
1119 if (timeout || flow_return >= GST_FLOW_OK) {
1120 GST_TRACE_OBJECT (self, "Actually aggregating!");
1121 flow_return = klass->aggregate (self, timeout);
1124 if (flow_return == GST_AGGREGATOR_FLOW_NEED_DATA)
1127 GST_OBJECT_LOCK (self);
1128 if (flow_return == GST_FLOW_FLUSHING && priv->flush_seeking) {
1129 /* We don't want to set the pads to flushing, but we want to
1130 * stop the thread, so just break here */
1131 GST_OBJECT_UNLOCK (self);
1134 GST_OBJECT_UNLOCK (self);
1136 if (flow_return == GST_FLOW_EOS || flow_return == GST_FLOW_ERROR) {
1137 gst_aggregator_push_eos (self);
1140 GST_LOG_OBJECT (self, "flow return is %s", gst_flow_get_name (flow_return));
1142 if (flow_return != GST_FLOW_OK) {
1145 GST_OBJECT_LOCK (self);
1146 for (item = GST_ELEMENT (self)->sinkpads; item; item = item->next) {
1147 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (item->data);
1149 gst_aggregator_pad_set_flushing (aggpad, flow_return, TRUE);
1151 GST_OBJECT_UNLOCK (self);
1156 /* Pause the task here, the only ways to get here are:
1157 * 1) We're stopping, in which case the task is stopped anyway
1158 * 2) We got a flow error above, in which case it might take
1159 * some time to forward the flow return upstream and we
1160 * would otherwise call the task function over and over
1161 * again without doing anything
1163 gst_pad_pause_task (self->srcpad);
1167 gst_aggregator_start (GstAggregator * self)
1169 GstAggregatorClass *klass;
1172 self->priv->send_stream_start = TRUE;
1173 self->priv->send_segment = TRUE;
1174 self->priv->send_eos = TRUE;
1175 self->priv->srccaps = NULL;
1177 gst_aggregator_set_allocation (self, NULL, NULL, NULL, NULL);
1179 klass = GST_AGGREGATOR_GET_CLASS (self);
1182 result = klass->start (self);
1190 _check_pending_flush_stop (GstAggregatorPad * pad)
1195 res = (!pad->priv->pending_flush_stop && !pad->priv->pending_flush_start);
1202 gst_aggregator_stop_srcpad_task (GstAggregator * self, GstEvent * flush_start)
1204 gboolean res = TRUE;
1206 GST_INFO_OBJECT (self, "%s srcpad task",
1207 flush_start ? "Pausing" : "Stopping");
1210 self->priv->running = FALSE;
1211 SRC_BROADCAST (self);
1215 res = gst_pad_push_event (self->srcpad, flush_start);
1218 gst_pad_stop_task (self->srcpad);
1224 gst_aggregator_start_srcpad_task (GstAggregator * self)
1226 GST_INFO_OBJECT (self, "Starting srcpad task");
1228 self->priv->running = TRUE;
1229 gst_pad_start_task (GST_PAD (self->srcpad),
1230 (GstTaskFunction) gst_aggregator_aggregate_func, self, NULL);
1233 static GstFlowReturn
1234 gst_aggregator_flush (GstAggregator * self)
1236 GstFlowReturn ret = GST_FLOW_OK;
1237 GstAggregatorPrivate *priv = self->priv;
1238 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
1240 GST_DEBUG_OBJECT (self, "Flushing everything");
1241 GST_OBJECT_LOCK (self);
1242 priv->send_segment = TRUE;
1243 priv->flush_seeking = FALSE;
1244 priv->tags_changed = FALSE;
1245 GST_OBJECT_UNLOCK (self);
1247 ret = klass->flush (self);
1253 /* Called with GstAggregator's object lock held */
1256 gst_aggregator_all_flush_stop_received_locked (GstAggregator * self)
1259 GstAggregatorPad *tmppad;
1261 for (tmp = GST_ELEMENT (self)->sinkpads; tmp; tmp = tmp->next) {
1262 tmppad = (GstAggregatorPad *) tmp->data;
1264 if (_check_pending_flush_stop (tmppad) == FALSE) {
1265 GST_DEBUG_OBJECT (tmppad, "Is not last %i -- %i",
1266 tmppad->priv->pending_flush_start, tmppad->priv->pending_flush_stop);
1275 gst_aggregator_flush_start (GstAggregator * self, GstAggregatorPad * aggpad,
1278 GstAggregatorPrivate *priv = self->priv;
1279 GstAggregatorPadPrivate *padpriv = aggpad->priv;
1281 gst_aggregator_pad_set_flushing (aggpad, GST_FLOW_FLUSHING, FALSE);
1283 PAD_FLUSH_LOCK (aggpad);
1285 if (padpriv->pending_flush_start) {
1286 GST_DEBUG_OBJECT (aggpad, "Expecting FLUSH_STOP now");
1288 padpriv->pending_flush_start = FALSE;
1289 padpriv->pending_flush_stop = TRUE;
1291 PAD_UNLOCK (aggpad);
1293 GST_OBJECT_LOCK (self);
1294 if (priv->flush_seeking) {
1295 /* If flush_seeking we forward the first FLUSH_START */
1296 if (priv->pending_flush_start) {
1297 priv->pending_flush_start = FALSE;
1298 GST_OBJECT_UNLOCK (self);
1300 GST_INFO_OBJECT (self, "Flushing, pausing srcpad task");
1301 gst_aggregator_stop_srcpad_task (self, event);
1303 GST_INFO_OBJECT (self, "Getting STREAM_LOCK while seeking");
1304 GST_PAD_STREAM_LOCK (self->srcpad);
1305 GST_LOG_OBJECT (self, "GOT STREAM_LOCK");
1308 GST_OBJECT_UNLOCK (self);
1309 gst_event_unref (event);
1312 GST_OBJECT_UNLOCK (self);
1313 gst_event_unref (event);
1315 PAD_FLUSH_UNLOCK (aggpad);
1318 /* Must be called with the the PAD_LOCK held */
1320 update_time_level (GstAggregatorPad * aggpad, gboolean head)
1323 if (GST_CLOCK_TIME_IS_VALID (aggpad->priv->head_position) &&
1324 aggpad->priv->head_segment.format == GST_FORMAT_TIME)
1325 aggpad->priv->head_time =
1326 gst_segment_to_running_time (&aggpad->priv->head_segment,
1327 GST_FORMAT_TIME, aggpad->priv->head_position);
1329 aggpad->priv->head_time = GST_CLOCK_TIME_NONE;
1331 if (!GST_CLOCK_TIME_IS_VALID (aggpad->priv->tail_time))
1332 aggpad->priv->tail_time = aggpad->priv->head_time;
1334 if (GST_CLOCK_TIME_IS_VALID (aggpad->priv->tail_position) &&
1335 aggpad->segment.format == GST_FORMAT_TIME)
1336 aggpad->priv->tail_time =
1337 gst_segment_to_running_time (&aggpad->segment,
1338 GST_FORMAT_TIME, aggpad->priv->tail_position);
1340 aggpad->priv->tail_time = aggpad->priv->head_time;
1343 if (aggpad->priv->head_time == GST_CLOCK_TIME_NONE ||
1344 aggpad->priv->tail_time == GST_CLOCK_TIME_NONE) {
1345 aggpad->priv->time_level = 0;
1349 if (aggpad->priv->tail_time > aggpad->priv->head_time)
1350 aggpad->priv->time_level = 0;
1352 aggpad->priv->time_level = aggpad->priv->head_time -
1353 aggpad->priv->tail_time;
1357 /* GstAggregator vmethods default implementations */
1359 gst_aggregator_default_sink_event (GstAggregator * self,
1360 GstAggregatorPad * aggpad, GstEvent * event)
1362 gboolean res = TRUE;
1363 GstPad *pad = GST_PAD (aggpad);
1364 GstAggregatorPrivate *priv = self->priv;
1366 switch (GST_EVENT_TYPE (event)) {
1367 case GST_EVENT_FLUSH_START:
1369 gst_aggregator_flush_start (self, aggpad, event);
1370 /* We forward only in one case: right after flush_seeking */
1374 case GST_EVENT_FLUSH_STOP:
1376 GST_DEBUG_OBJECT (aggpad, "Got FLUSH_STOP");
1378 gst_aggregator_pad_flush (aggpad, self);
1379 GST_OBJECT_LOCK (self);
1380 if (priv->flush_seeking) {
1381 g_atomic_int_set (&aggpad->priv->pending_flush_stop, FALSE);
1382 if (gst_aggregator_all_flush_stop_received_locked (self)) {
1383 GST_OBJECT_UNLOCK (self);
1384 /* That means we received FLUSH_STOP/FLUSH_STOP on
1385 * all sinkpads -- Seeking is Done... sending FLUSH_STOP */
1386 gst_aggregator_flush (self);
1387 gst_pad_push_event (self->srcpad, event);
1390 priv->send_eos = TRUE;
1391 SRC_BROADCAST (self);
1394 GST_INFO_OBJECT (self, "Releasing source pad STREAM_LOCK");
1395 GST_PAD_STREAM_UNLOCK (self->srcpad);
1396 gst_aggregator_start_srcpad_task (self);
1398 GST_OBJECT_UNLOCK (self);
1401 GST_OBJECT_UNLOCK (self);
1404 /* We never forward the event */
1409 GST_DEBUG_OBJECT (aggpad, "EOS");
1411 /* We still have a buffer, and we don't want the subclass to have to
1412 * check for it. Mark pending_eos, eos will be set when steal_buffer is
1417 if (aggpad->priv->num_buffers == 0) {
1418 aggpad->priv->eos = TRUE;
1420 aggpad->priv->pending_eos = TRUE;
1422 PAD_UNLOCK (aggpad);
1424 SRC_BROADCAST (self);
1428 case GST_EVENT_SEGMENT:
1431 GST_OBJECT_LOCK (aggpad);
1432 gst_event_copy_segment (event, &aggpad->segment);
1433 update_time_level (aggpad, FALSE);
1434 GST_OBJECT_UNLOCK (aggpad);
1435 PAD_UNLOCK (aggpad);
1437 GST_OBJECT_LOCK (self);
1438 self->priv->seqnum = gst_event_get_seqnum (event);
1439 GST_OBJECT_UNLOCK (self);
1442 case GST_EVENT_STREAM_START:
1448 GstClockTime pts, endpts;
1449 GstClockTime duration;
1452 gst_event_parse_gap (event, &pts, &duration);
1453 gapbuf = gst_buffer_new ();
1455 if (GST_CLOCK_TIME_IS_VALID (duration))
1456 endpts = pts + duration;
1458 endpts = GST_CLOCK_TIME_NONE;
1460 GST_OBJECT_LOCK (aggpad);
1461 res = gst_segment_clip (&aggpad->segment, GST_FORMAT_TIME, pts, endpts,
1463 GST_OBJECT_UNLOCK (aggpad);
1466 GST_WARNING_OBJECT (self, "GAP event outside segment, dropping");
1470 if (GST_CLOCK_TIME_IS_VALID (endpts) && GST_CLOCK_TIME_IS_VALID (pts))
1471 duration = endpts - pts;
1473 duration = GST_CLOCK_TIME_NONE;
1475 GST_BUFFER_PTS (gapbuf) = pts;
1476 GST_BUFFER_DURATION (gapbuf) = duration;
1477 GST_BUFFER_FLAG_SET (gapbuf, GST_BUFFER_FLAG_GAP);
1478 GST_BUFFER_FLAG_SET (gapbuf, GST_BUFFER_FLAG_DROPPABLE);
1480 if (gst_aggregator_pad_chain_internal (self, aggpad, gapbuf, FALSE) !=
1482 GST_WARNING_OBJECT (self, "Failed to chain gap buffer");
1492 gst_event_parse_tag (event, &tags);
1494 if (gst_tag_list_get_scope (tags) == GST_TAG_SCOPE_STREAM) {
1495 gst_aggregator_merge_tags (self, tags, GST_TAG_MERGE_REPLACE);
1496 gst_event_unref (event);
1508 GST_DEBUG_OBJECT (pad, "Forwarding event: %" GST_PTR_FORMAT, event);
1509 return gst_pad_event_default (pad, GST_OBJECT (self), event);
1512 GST_DEBUG_OBJECT (pad, "Eating event: %" GST_PTR_FORMAT, event);
1514 gst_event_unref (event);
1519 static inline gboolean
1520 gst_aggregator_stop_pad (GstAggregator * self, GstAggregatorPad * pad,
1521 gpointer unused_udata)
1523 gst_aggregator_pad_flush (pad, self);
1526 pad->priv->flow_return = GST_FLOW_FLUSHING;
1527 pad->priv->negotiated = FALSE;
1528 PAD_BROADCAST_EVENT (pad);
1535 gst_aggregator_stop (GstAggregator * agg)
1537 GstAggregatorClass *klass;
1540 gst_aggregator_reset_flow_values (agg);
1542 gst_aggregator_iterate_sinkpads (agg, gst_aggregator_stop_pad, NULL);
1544 klass = GST_AGGREGATOR_GET_CLASS (agg);
1547 result = klass->stop (agg);
1551 agg->priv->has_peer_latency = FALSE;
1552 agg->priv->peer_latency_live = FALSE;
1553 agg->priv->peer_latency_min = agg->priv->peer_latency_max = FALSE;
1555 if (agg->priv->tags)
1556 gst_tag_list_unref (agg->priv->tags);
1557 agg->priv->tags = NULL;
1559 gst_aggregator_set_allocation (agg, NULL, NULL, NULL, NULL);
1564 /* GstElement vmethods implementations */
1565 static GstStateChangeReturn
1566 gst_aggregator_change_state (GstElement * element, GstStateChange transition)
1568 GstStateChangeReturn ret;
1569 GstAggregator *self = GST_AGGREGATOR (element);
1571 switch (transition) {
1572 case GST_STATE_CHANGE_READY_TO_PAUSED:
1573 if (!gst_aggregator_start (self))
1581 GST_ELEMENT_CLASS (aggregator_parent_class)->change_state (element,
1582 transition)) == GST_STATE_CHANGE_FAILURE)
1586 switch (transition) {
1587 case GST_STATE_CHANGE_PAUSED_TO_READY:
1588 if (!gst_aggregator_stop (self)) {
1589 /* What to do in this case? Error out? */
1590 GST_ERROR_OBJECT (self, "Subclass failed to stop.");
1602 GST_ERROR_OBJECT (element, "parent failed state change");
1607 GST_ERROR_OBJECT (element, "Subclass failed to start");
1608 return GST_STATE_CHANGE_FAILURE;
1613 gst_aggregator_release_pad (GstElement * element, GstPad * pad)
1615 GstAggregator *self = GST_AGGREGATOR (element);
1616 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
1618 GST_INFO_OBJECT (pad, "Removing pad");
1621 gst_aggregator_pad_set_flushing (aggpad, GST_FLOW_FLUSHING, TRUE);
1622 gst_element_remove_pad (element, pad);
1624 self->priv->has_peer_latency = FALSE;
1625 SRC_BROADCAST (self);
1629 static GstAggregatorPad *
1630 gst_aggregator_default_create_new_pad (GstAggregator * self,
1631 GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
1633 GstAggregatorPad *agg_pad;
1634 GstAggregatorPrivate *priv = self->priv;
1638 if (templ->direction != GST_PAD_SINK)
1641 if (templ->presence != GST_PAD_REQUEST)
1644 GST_OBJECT_LOCK (self);
1645 if (req_name == NULL || strlen (req_name) < 6
1646 || !g_str_has_prefix (req_name, "sink_")) {
1647 /* no name given when requesting the pad, use next available int */
1648 serial = ++priv->max_padserial;
1650 /* parse serial number from requested padname */
1651 serial = g_ascii_strtoull (&req_name[5], NULL, 10);
1652 if (serial > priv->max_padserial)
1653 priv->max_padserial = serial;
1656 name = g_strdup_printf ("sink_%u", serial);
1657 agg_pad = g_object_new (GST_AGGREGATOR_GET_CLASS (self)->sinkpads_type,
1658 "name", name, "direction", GST_PAD_SINK, "template", templ, NULL);
1661 GST_OBJECT_UNLOCK (self);
1668 GST_WARNING_OBJECT (self, "request new pad that is not a SINK pad");
1673 GST_WARNING_OBJECT (self, "request new pad that is not a REQUEST pad");
1679 gst_aggregator_request_new_pad (GstElement * element,
1680 GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
1682 GstAggregator *self;
1683 GstAggregatorPad *agg_pad;
1684 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (element);
1685 GstAggregatorPrivate *priv = GST_AGGREGATOR (element)->priv;
1687 self = GST_AGGREGATOR (element);
1689 agg_pad = klass->create_new_pad (self, templ, req_name, caps);
1691 GST_ERROR_OBJECT (element, "Couldn't create new pad");
1695 GST_DEBUG_OBJECT (element, "Adding pad %s", GST_PAD_NAME (agg_pad));
1698 gst_pad_set_active (GST_PAD (agg_pad), TRUE);
1700 /* add the pad to the element */
1701 gst_element_add_pad (element, GST_PAD (agg_pad));
1703 return GST_PAD (agg_pad);
1706 /* Must be called with SRC_LOCK held */
1709 gst_aggregator_query_latency_unlocked (GstAggregator * self, GstQuery * query)
1711 gboolean query_ret, live;
1712 GstClockTime our_latency, min, max;
1714 query_ret = gst_pad_query_default (self->srcpad, GST_OBJECT (self), query);
1717 GST_WARNING_OBJECT (self, "Latency query failed");
1721 gst_query_parse_latency (query, &live, &min, &max);
1723 our_latency = self->priv->latency;
1725 if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (min))) {
1726 GST_ERROR_OBJECT (self, "Invalid minimum latency %" GST_TIME_FORMAT
1727 ". Please file a bug at " PACKAGE_BUGREPORT ".", GST_TIME_ARGS (min));
1731 if (min > max && GST_CLOCK_TIME_IS_VALID (max)) {
1732 GST_ELEMENT_WARNING (self, CORE, CLOCK, (NULL),
1733 ("Impossible to configure latency: max %" GST_TIME_FORMAT " < min %"
1734 GST_TIME_FORMAT ". Add queues or other buffering elements.",
1735 GST_TIME_ARGS (max), GST_TIME_ARGS (min)));
1739 self->priv->peer_latency_live = live;
1740 self->priv->peer_latency_min = min;
1741 self->priv->peer_latency_max = max;
1742 self->priv->has_peer_latency = TRUE;
1746 min += self->priv->sub_latency_min;
1747 if (GST_CLOCK_TIME_IS_VALID (self->priv->sub_latency_max)
1748 && GST_CLOCK_TIME_IS_VALID (max))
1749 max += self->priv->sub_latency_max + our_latency;
1751 max = GST_CLOCK_TIME_NONE;
1753 SRC_BROADCAST (self);
1755 GST_DEBUG_OBJECT (self, "configured latency live:%s min:%" G_GINT64_FORMAT
1756 " max:%" G_GINT64_FORMAT, live ? "true" : "false", min, max);
1758 gst_query_set_latency (query, live, min, max);
1764 * MUST be called with the src_lock held.
1766 * See gst_aggregator_get_latency() for doc
1769 gst_aggregator_get_latency_unlocked (GstAggregator * self)
1771 GstClockTime latency;
1773 g_return_val_if_fail (GST_IS_AGGREGATOR (self), 0);
1775 if (!self->priv->has_peer_latency) {
1776 GstQuery *query = gst_query_new_latency ();
1779 ret = gst_aggregator_query_latency_unlocked (self, query);
1780 gst_query_unref (query);
1782 return GST_CLOCK_TIME_NONE;
1785 if (!self->priv->has_peer_latency || !self->priv->peer_latency_live)
1786 return GST_CLOCK_TIME_NONE;
1788 /* latency_min is never GST_CLOCK_TIME_NONE by construction */
1789 latency = self->priv->peer_latency_min;
1792 latency += self->priv->latency;
1793 latency += self->priv->sub_latency_min;
1799 * gst_aggregator_get_latency:
1800 * @self: a #GstAggregator
1802 * Retrieves the latency values reported by @self in response to the latency
1803 * query, or %GST_CLOCK_TIME_NONE if there is not live source connected and the element
1804 * will not wait for the clock.
1806 * Typically only called by subclasses.
1808 * Returns: The latency or %GST_CLOCK_TIME_NONE if the element does not sync
1811 gst_aggregator_get_latency (GstAggregator * self)
1816 ret = gst_aggregator_get_latency_unlocked (self);
1823 gst_aggregator_send_event (GstElement * element, GstEvent * event)
1825 GstAggregator *self = GST_AGGREGATOR (element);
1827 GST_STATE_LOCK (element);
1828 if (GST_EVENT_TYPE (event) == GST_EVENT_SEEK &&
1829 GST_STATE (element) < GST_STATE_PAUSED) {
1833 GstSeekType start_type, stop_type;
1836 gst_event_parse_seek (event, &rate, &fmt, &flags, &start_type,
1837 &start, &stop_type, &stop);
1839 GST_OBJECT_LOCK (self);
1840 gst_segment_do_seek (&self->segment, rate, fmt, flags, start_type, start,
1841 stop_type, stop, NULL);
1842 self->priv->seqnum = gst_event_get_seqnum (event);
1843 self->priv->first_buffer = FALSE;
1844 GST_OBJECT_UNLOCK (self);
1846 GST_DEBUG_OBJECT (element, "Storing segment %" GST_PTR_FORMAT, event);
1848 GST_STATE_UNLOCK (element);
1851 return GST_ELEMENT_CLASS (aggregator_parent_class)->send_event (element,
1856 gst_aggregator_default_src_query (GstAggregator * self, GstQuery * query)
1858 gboolean res = TRUE;
1860 switch (GST_QUERY_TYPE (query)) {
1861 case GST_QUERY_SEEKING:
1865 /* don't pass it along as some (file)sink might claim it does
1866 * whereas with a collectpads in between that will not likely work */
1867 gst_query_parse_seeking (query, &format, NULL, NULL, NULL);
1868 gst_query_set_seeking (query, format, FALSE, 0, -1);
1873 case GST_QUERY_LATENCY:
1875 res = gst_aggregator_query_latency_unlocked (self, query);
1879 return gst_pad_query_default (self->srcpad, GST_OBJECT (self), query);
1886 gst_aggregator_event_forward_func (GstPad * pad, gpointer user_data)
1888 EventData *evdata = user_data;
1889 gboolean ret = TRUE;
1890 GstPad *peer = gst_pad_get_peer (pad);
1891 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
1894 if (evdata->only_to_active_pads && aggpad->priv->first_buffer) {
1895 GST_DEBUG_OBJECT (pad, "not sending event to inactive pad");
1898 ret = gst_pad_send_event (peer, gst_event_ref (evdata->event));
1899 GST_DEBUG_OBJECT (pad, "return of event push is %d", ret);
1900 gst_object_unref (peer);
1905 if (GST_EVENT_TYPE (evdata->event) == GST_EVENT_SEEK) {
1906 GstQuery *seeking = gst_query_new_seeking (GST_FORMAT_TIME);
1908 GST_DEBUG_OBJECT (pad, "Event %" GST_PTR_FORMAT " failed", evdata->event);
1910 if (gst_pad_query (peer, seeking)) {
1913 gst_query_parse_seeking (seeking, NULL, &seekable, NULL, NULL);
1915 if (seekable == FALSE) {
1916 GST_INFO_OBJECT (pad,
1917 "Source not seekable, We failed but it does not matter!");
1922 GST_ERROR_OBJECT (pad, "Query seeking FAILED");
1925 gst_query_unref (seeking);
1928 if (evdata->flush) {
1930 aggpad->priv->pending_flush_start = FALSE;
1931 aggpad->priv->pending_flush_stop = FALSE;
1932 PAD_UNLOCK (aggpad);
1935 evdata->one_actually_seeked = TRUE;
1938 evdata->result &= ret;
1940 /* Always send to all pads */
1945 gst_aggregator_forward_event_to_all_sinkpads (GstAggregator * self,
1946 GstEvent * event, gboolean flush, gboolean only_to_active_pads)
1950 evdata.event = event;
1951 evdata.result = TRUE;
1952 evdata.flush = flush;
1953 evdata.one_actually_seeked = FALSE;
1954 evdata.only_to_active_pads = only_to_active_pads;
1956 /* We first need to set all pads as flushing in a first pass
1957 * as flush_start flush_stop is sometimes sent synchronously
1958 * while we send the seek event */
1962 GST_OBJECT_LOCK (self);
1963 for (l = GST_ELEMENT_CAST (self)->sinkpads; l != NULL; l = l->next) {
1964 GstAggregatorPad *pad = l->data;
1967 pad->priv->pending_flush_start = TRUE;
1968 pad->priv->pending_flush_stop = FALSE;
1971 GST_OBJECT_UNLOCK (self);
1974 gst_pad_forward (self->srcpad, gst_aggregator_event_forward_func, &evdata);
1976 gst_event_unref (event);
1982 gst_aggregator_do_seek (GstAggregator * self, GstEvent * event)
1987 GstSeekType start_type, stop_type;
1991 GstAggregatorPrivate *priv = self->priv;
1993 gst_event_parse_seek (event, &rate, &fmt, &flags, &start_type,
1994 &start, &stop_type, &stop);
1996 GST_INFO_OBJECT (self, "starting SEEK");
1998 flush = flags & GST_SEEK_FLAG_FLUSH;
2000 GST_OBJECT_LOCK (self);
2002 priv->pending_flush_start = TRUE;
2003 priv->flush_seeking = TRUE;
2006 gst_segment_do_seek (&self->segment, rate, fmt, flags, start_type, start,
2007 stop_type, stop, NULL);
2009 /* Seeking sets a position */
2010 self->priv->first_buffer = FALSE;
2011 GST_OBJECT_UNLOCK (self);
2013 /* forward the seek upstream */
2015 gst_aggregator_forward_event_to_all_sinkpads (self, event, flush, FALSE);
2018 if (!evdata.result || !evdata.one_actually_seeked) {
2019 GST_OBJECT_LOCK (self);
2020 priv->flush_seeking = FALSE;
2021 priv->pending_flush_start = FALSE;
2022 GST_OBJECT_UNLOCK (self);
2025 GST_INFO_OBJECT (self, "seek done, result: %d", evdata.result);
2027 return evdata.result;
2031 gst_aggregator_default_src_event (GstAggregator * self, GstEvent * event)
2034 gboolean res = TRUE;
2036 switch (GST_EVENT_TYPE (event)) {
2037 case GST_EVENT_SEEK:
2039 gst_event_ref (event);
2040 res = gst_aggregator_do_seek (self, event);
2041 gst_event_unref (event);
2045 case GST_EVENT_NAVIGATION:
2047 /* navigation is rather pointless. */
2049 gst_event_unref (event);
2058 /* Don't forward QOS events to pads that had no active buffer yet. Otherwise
2059 * they will receive a QOS event that has earliest_time=0 (because we can't
2060 * have negative timestamps), and consider their buffer as too late */
2062 gst_aggregator_forward_event_to_all_sinkpads (self, event, FALSE,
2063 GST_EVENT_TYPE (event) == GST_EVENT_QOS);
2064 res = evdata.result;
2071 gst_aggregator_src_pad_event_func (GstPad * pad, GstObject * parent,
2074 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2076 return klass->src_event (GST_AGGREGATOR (parent), event);
2080 gst_aggregator_src_pad_query_func (GstPad * pad, GstObject * parent,
2083 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2085 return klass->src_query (GST_AGGREGATOR (parent), query);
2089 gst_aggregator_src_pad_activate_mode_func (GstPad * pad,
2090 GstObject * parent, GstPadMode mode, gboolean active)
2092 GstAggregator *self = GST_AGGREGATOR (parent);
2093 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2095 if (klass->src_activate) {
2096 if (klass->src_activate (self, mode, active) == FALSE) {
2101 if (active == TRUE) {
2103 case GST_PAD_MODE_PUSH:
2105 GST_INFO_OBJECT (pad, "Activating pad!");
2106 gst_aggregator_start_srcpad_task (self);
2111 GST_ERROR_OBJECT (pad, "Only supported mode is PUSH");
2118 GST_INFO_OBJECT (self, "Deactivating srcpad");
2119 gst_aggregator_stop_srcpad_task (self, FALSE);
2125 gst_aggregator_default_sink_query (GstAggregator * self,
2126 GstAggregatorPad * aggpad, GstQuery * query)
2128 GstPad *pad = GST_PAD (aggpad);
2130 if (GST_QUERY_TYPE (query) == GST_QUERY_ALLOCATION) {
2131 GstQuery *decide_query = NULL;
2132 GstAggregatorClass *agg_class;
2135 GST_OBJECT_LOCK (self);
2137 if (G_UNLIKELY (!aggpad->priv->negotiated)) {
2138 GST_DEBUG_OBJECT (self,
2139 "not negotiated yet, can't answer ALLOCATION query");
2140 PAD_UNLOCK (aggpad);
2141 GST_OBJECT_UNLOCK (self);
2146 if ((decide_query = self->priv->allocation_query))
2147 gst_query_ref (decide_query);
2148 PAD_UNLOCK (aggpad);
2149 GST_OBJECT_UNLOCK (self);
2151 GST_DEBUG_OBJECT (self,
2152 "calling propose allocation with query %" GST_PTR_FORMAT, decide_query);
2154 agg_class = GST_AGGREGATOR_GET_CLASS (self);
2156 /* pass the query to the propose_allocation vmethod if any */
2157 if (agg_class->propose_allocation)
2158 ret = agg_class->propose_allocation (self, aggpad, decide_query, query);
2163 gst_query_unref (decide_query);
2165 GST_DEBUG_OBJECT (self, "ALLOCATION ret %d, %" GST_PTR_FORMAT, ret, query);
2169 return gst_pad_query_default (pad, GST_OBJECT (self), query);
2173 gst_aggregator_finalize (GObject * object)
2175 GstAggregator *self = (GstAggregator *) object;
2177 g_mutex_clear (&self->priv->src_lock);
2178 g_cond_clear (&self->priv->src_cond);
2180 G_OBJECT_CLASS (aggregator_parent_class)->finalize (object);
2184 * gst_aggregator_set_latency_property:
2185 * @agg: a #GstAggregator
2186 * @latency: the new latency value (in nanoseconds).
2188 * Sets the new latency value to @latency. This value is used to limit the
2189 * amount of time a pad waits for data to appear before considering the pad
2193 gst_aggregator_set_latency_property (GstAggregator * self, gint64 latency)
2197 g_return_if_fail (GST_IS_AGGREGATOR (self));
2198 g_return_if_fail (GST_CLOCK_TIME_IS_VALID (latency));
2201 changed = (self->priv->latency != latency);
2206 GST_OBJECT_LOCK (self);
2207 /* First lock all the pads */
2208 for (item = GST_ELEMENT_CAST (self)->sinkpads; item; item = item->next) {
2209 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (item->data);
2213 self->priv->latency = latency;
2215 SRC_BROADCAST (self);
2217 /* Now wake up the pads */
2218 for (item = GST_ELEMENT_CAST (self)->sinkpads; item; item = item->next) {
2219 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (item->data);
2220 PAD_BROADCAST_EVENT (aggpad);
2221 PAD_UNLOCK (aggpad);
2223 GST_OBJECT_UNLOCK (self);
2229 gst_element_post_message (GST_ELEMENT_CAST (self),
2230 gst_message_new_latency (GST_OBJECT_CAST (self)));
2234 * gst_aggregator_get_latency_property:
2235 * @agg: a #GstAggregator
2237 * Gets the latency value. See gst_aggregator_set_latency for
2240 * Returns: The time in nanoseconds to wait for data to arrive on a sink pad
2241 * before a pad is deemed unresponsive. A value of -1 means an
2245 gst_aggregator_get_latency_property (GstAggregator * agg)
2249 g_return_val_if_fail (GST_IS_AGGREGATOR (agg), -1);
2251 GST_OBJECT_LOCK (agg);
2252 res = agg->priv->latency;
2253 GST_OBJECT_UNLOCK (agg);
2259 gst_aggregator_set_property (GObject * object, guint prop_id,
2260 const GValue * value, GParamSpec * pspec)
2262 GstAggregator *agg = GST_AGGREGATOR (object);
2266 gst_aggregator_set_latency_property (agg, g_value_get_int64 (value));
2268 case PROP_START_TIME_SELECTION:
2269 agg->priv->start_time_selection = g_value_get_enum (value);
2271 case PROP_START_TIME:
2272 agg->priv->start_time = g_value_get_uint64 (value);
2275 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2281 gst_aggregator_get_property (GObject * object, guint prop_id,
2282 GValue * value, GParamSpec * pspec)
2284 GstAggregator *agg = GST_AGGREGATOR (object);
2288 g_value_set_int64 (value, gst_aggregator_get_latency_property (agg));
2290 case PROP_START_TIME_SELECTION:
2291 g_value_set_enum (value, agg->priv->start_time_selection);
2293 case PROP_START_TIME:
2294 g_value_set_uint64 (value, agg->priv->start_time);
2297 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2302 /* GObject vmethods implementations */
2304 gst_aggregator_class_init (GstAggregatorClass * klass)
2306 GObjectClass *gobject_class = (GObjectClass *) klass;
2307 GstElementClass *gstelement_class = (GstElementClass *) klass;
2309 aggregator_parent_class = g_type_class_peek_parent (klass);
2310 g_type_class_add_private (klass, sizeof (GstAggregatorPrivate));
2312 GST_DEBUG_CATEGORY_INIT (aggregator_debug, "aggregator",
2313 GST_DEBUG_FG_MAGENTA, "GstAggregator");
2315 klass->sinkpads_type = GST_TYPE_AGGREGATOR_PAD;
2317 klass->sink_event = gst_aggregator_default_sink_event;
2318 klass->sink_query = gst_aggregator_default_sink_query;
2320 klass->src_event = gst_aggregator_default_src_event;
2321 klass->src_query = gst_aggregator_default_src_query;
2323 klass->create_new_pad = gst_aggregator_default_create_new_pad;
2324 klass->update_src_caps = gst_aggregator_default_update_src_caps;
2325 klass->fixate_src_caps = gst_aggregator_default_fixate_src_caps;
2326 klass->negotiated_src_caps = gst_aggregator_default_negotiated_src_caps;
2328 gstelement_class->request_new_pad =
2329 GST_DEBUG_FUNCPTR (gst_aggregator_request_new_pad);
2330 gstelement_class->send_event = GST_DEBUG_FUNCPTR (gst_aggregator_send_event);
2331 gstelement_class->release_pad =
2332 GST_DEBUG_FUNCPTR (gst_aggregator_release_pad);
2333 gstelement_class->change_state =
2334 GST_DEBUG_FUNCPTR (gst_aggregator_change_state);
2336 gobject_class->set_property = gst_aggregator_set_property;
2337 gobject_class->get_property = gst_aggregator_get_property;
2338 gobject_class->finalize = gst_aggregator_finalize;
2340 g_object_class_install_property (gobject_class, PROP_LATENCY,
2341 g_param_spec_int64 ("latency", "Buffer latency",
2342 "Additional latency in live mode to allow upstream "
2343 "to take longer to produce buffers for the current "
2344 "position (in nanoseconds)", 0,
2345 (G_MAXLONG == G_MAXINT64) ? G_MAXINT64 : (G_MAXLONG * GST_SECOND - 1),
2346 DEFAULT_LATENCY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
2348 g_object_class_install_property (gobject_class, PROP_START_TIME_SELECTION,
2349 g_param_spec_enum ("start-time-selection", "Start Time Selection",
2350 "Decides which start time is output",
2351 gst_aggregator_start_time_selection_get_type (),
2352 DEFAULT_START_TIME_SELECTION,
2353 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
2355 g_object_class_install_property (gobject_class, PROP_START_TIME,
2356 g_param_spec_uint64 ("start-time", "Start Time",
2357 "Start time to use if start-time-selection=set", 0,
2359 DEFAULT_START_TIME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
2361 GST_DEBUG_REGISTER_FUNCPTR (gst_aggregator_stop_pad);
2365 gst_aggregator_init (GstAggregator * self, GstAggregatorClass * klass)
2367 GstPadTemplate *pad_template;
2368 GstAggregatorPrivate *priv;
2370 g_return_if_fail (klass->aggregate != NULL);
2373 G_TYPE_INSTANCE_GET_PRIVATE (self, GST_TYPE_AGGREGATOR,
2374 GstAggregatorPrivate);
2379 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass), "src");
2380 g_return_if_fail (pad_template != NULL);
2382 priv->max_padserial = -1;
2383 priv->tags_changed = FALSE;
2385 self->priv->peer_latency_live = FALSE;
2386 self->priv->peer_latency_min = self->priv->sub_latency_min = 0;
2387 self->priv->peer_latency_max = self->priv->sub_latency_max = 0;
2388 self->priv->has_peer_latency = FALSE;
2389 gst_aggregator_reset_flow_values (self);
2391 self->srcpad = gst_pad_new_from_template (pad_template, "src");
2393 gst_pad_set_event_function (self->srcpad,
2394 GST_DEBUG_FUNCPTR (gst_aggregator_src_pad_event_func));
2395 gst_pad_set_query_function (self->srcpad,
2396 GST_DEBUG_FUNCPTR (gst_aggregator_src_pad_query_func));
2397 gst_pad_set_activatemode_function (self->srcpad,
2398 GST_DEBUG_FUNCPTR (gst_aggregator_src_pad_activate_mode_func));
2400 gst_element_add_pad (GST_ELEMENT (self), self->srcpad);
2402 self->priv->latency = DEFAULT_LATENCY;
2403 self->priv->start_time_selection = DEFAULT_START_TIME_SELECTION;
2404 self->priv->start_time = DEFAULT_START_TIME;
2406 g_mutex_init (&self->priv->src_lock);
2407 g_cond_init (&self->priv->src_cond);
2410 /* we can't use G_DEFINE_ABSTRACT_TYPE because we need the klass in the _init
2411 * method to get to the padtemplates */
2413 gst_aggregator_get_type (void)
2415 static volatile gsize type = 0;
2417 if (g_once_init_enter (&type)) {
2419 static const GTypeInfo info = {
2420 sizeof (GstAggregatorClass),
2423 (GClassInitFunc) gst_aggregator_class_init,
2426 sizeof (GstAggregator),
2428 (GInstanceInitFunc) gst_aggregator_init,
2431 _type = g_type_register_static (GST_TYPE_ELEMENT,
2432 "GstAggregator", &info, G_TYPE_FLAG_ABSTRACT);
2433 g_once_init_leave (&type, _type);
2438 /* Must be called with SRC lock and PAD lock held */
2440 gst_aggregator_pad_has_space (GstAggregator * self, GstAggregatorPad * aggpad)
2442 /* Empty queue always has space */
2443 if (aggpad->priv->num_buffers == 0 && aggpad->priv->clipped_buffer == NULL)
2446 /* We also want at least two buffers, one is being processed and one is ready
2447 * for the next iteration when we operate in live mode. */
2448 if (self->priv->peer_latency_live && aggpad->priv->num_buffers < 2)
2451 /* zero latency, if there is a buffer, it's full */
2452 if (self->priv->latency == 0)
2455 /* Allow no more buffers than the latency */
2456 return (aggpad->priv->time_level <= self->priv->latency);
2459 /* Must be called with the PAD_LOCK held */
2461 apply_buffer (GstAggregatorPad * aggpad, GstBuffer * buffer, gboolean head)
2463 GstClockTime timestamp;
2465 if (GST_BUFFER_DTS_IS_VALID (buffer))
2466 timestamp = GST_BUFFER_DTS (buffer);
2468 timestamp = GST_BUFFER_PTS (buffer);
2470 if (timestamp == GST_CLOCK_TIME_NONE) {
2472 timestamp = aggpad->priv->head_position;
2474 timestamp = aggpad->priv->tail_position;
2478 if (GST_BUFFER_DURATION_IS_VALID (buffer))
2479 timestamp += GST_BUFFER_DURATION (buffer);
2482 aggpad->priv->head_position = timestamp;
2484 aggpad->priv->tail_position = timestamp;
2486 update_time_level (aggpad, head);
2489 static GstFlowReturn
2490 gst_aggregator_pad_chain_internal (GstAggregator * self,
2491 GstAggregatorPad * aggpad, GstBuffer * buffer, gboolean head)
2493 GstFlowReturn flow_return;
2494 GstClockTime buf_pts;
2496 GST_DEBUG_OBJECT (aggpad, "Start chaining a buffer %" GST_PTR_FORMAT, buffer);
2498 PAD_FLUSH_LOCK (aggpad);
2501 flow_return = aggpad->priv->flow_return;
2502 if (flow_return != GST_FLOW_OK)
2505 if (aggpad->priv->pending_eos == TRUE)
2508 PAD_UNLOCK (aggpad);
2510 buf_pts = GST_BUFFER_PTS (buffer);
2514 GST_OBJECT_LOCK (self);
2517 if (aggpad->priv->first_buffer) {
2518 self->priv->has_peer_latency = FALSE;
2519 aggpad->priv->first_buffer = FALSE;
2522 if (gst_aggregator_pad_has_space (self, aggpad)
2523 && aggpad->priv->flow_return == GST_FLOW_OK) {
2525 g_queue_push_head (&aggpad->priv->buffers, buffer);
2527 g_queue_push_tail (&aggpad->priv->buffers, buffer);
2528 apply_buffer (aggpad, buffer, head);
2529 aggpad->priv->num_buffers++;
2531 SRC_BROADCAST (self);
2535 flow_return = aggpad->priv->flow_return;
2536 if (flow_return != GST_FLOW_OK) {
2537 GST_OBJECT_UNLOCK (self);
2541 GST_DEBUG_OBJECT (aggpad, "Waiting for buffer to be consumed");
2542 GST_OBJECT_UNLOCK (self);
2544 PAD_WAIT_EVENT (aggpad);
2546 PAD_UNLOCK (aggpad);
2549 if (self->priv->first_buffer) {
2550 GstClockTime start_time;
2552 switch (self->priv->start_time_selection) {
2553 case GST_AGGREGATOR_START_TIME_SELECTION_ZERO:
2557 case GST_AGGREGATOR_START_TIME_SELECTION_FIRST:
2558 GST_OBJECT_LOCK (aggpad);
2559 if (aggpad->priv->head_segment.format == GST_FORMAT_TIME) {
2560 start_time = buf_pts;
2561 if (start_time != -1) {
2562 start_time = MAX (start_time, aggpad->priv->head_segment.start);
2564 gst_segment_to_running_time (&aggpad->priv->head_segment,
2565 GST_FORMAT_TIME, start_time);
2569 GST_WARNING_OBJECT (aggpad,
2570 "Ignoring request of selecting the first start time "
2571 "as the segment is a %s segment instead of a time segment",
2572 gst_format_get_name (aggpad->segment.format));
2574 GST_OBJECT_UNLOCK (aggpad);
2576 case GST_AGGREGATOR_START_TIME_SELECTION_SET:
2577 start_time = self->priv->start_time;
2578 if (start_time == -1)
2583 if (start_time != -1) {
2584 if (self->segment.position == -1)
2585 self->segment.position = start_time;
2587 self->segment.position = MIN (start_time, self->segment.position);
2589 GST_DEBUG_OBJECT (self, "Selecting start time %" GST_TIME_FORMAT,
2590 GST_TIME_ARGS (start_time));
2594 PAD_UNLOCK (aggpad);
2595 GST_OBJECT_UNLOCK (self);
2598 PAD_FLUSH_UNLOCK (aggpad);
2600 GST_DEBUG_OBJECT (aggpad, "Done chaining");
2605 PAD_UNLOCK (aggpad);
2606 PAD_FLUSH_UNLOCK (aggpad);
2608 GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping buffer",
2609 gst_flow_get_name (flow_return));
2611 gst_buffer_unref (buffer);
2616 PAD_UNLOCK (aggpad);
2617 PAD_FLUSH_UNLOCK (aggpad);
2619 gst_buffer_unref (buffer);
2620 GST_DEBUG_OBJECT (aggpad, "We are EOS already...");
2622 return GST_FLOW_EOS;
2625 static GstFlowReturn
2626 gst_aggregator_pad_chain (GstPad * pad, GstObject * object, GstBuffer * buffer)
2628 return gst_aggregator_pad_chain_internal (GST_AGGREGATOR_CAST (object),
2629 GST_AGGREGATOR_PAD_CAST (pad), buffer, TRUE);
2633 gst_aggregator_pad_query_func (GstPad * pad, GstObject * parent,
2636 GstAggregator *self = GST_AGGREGATOR (parent);
2637 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
2638 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2640 if (GST_QUERY_IS_SERIALIZED (query)) {
2642 gboolean ret = FALSE;
2647 if (aggpad->priv->flow_return != GST_FLOW_OK) {
2652 g_queue_push_head (&aggpad->priv->buffers, query);
2653 SRC_BROADCAST (self);
2656 while (!gst_aggregator_pad_queue_is_empty (aggpad)
2657 && aggpad->priv->flow_return == GST_FLOW_OK) {
2658 GST_DEBUG_OBJECT (aggpad, "Waiting for buffer to be consumed");
2659 PAD_WAIT_EVENT (aggpad);
2662 s = gst_query_writable_structure (query);
2663 if (gst_structure_get_boolean (s, "gst-aggregator-retval", &ret))
2664 gst_structure_remove_field (s, "gst-aggregator-retval");
2666 g_queue_remove (&aggpad->priv->buffers, query);
2668 if (aggpad->priv->flow_return != GST_FLOW_OK)
2671 PAD_UNLOCK (aggpad);
2676 return klass->sink_query (self, aggpad, query);
2679 GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping query",
2680 gst_flow_get_name (aggpad->priv->flow_return));
2681 PAD_UNLOCK (aggpad);
2686 static GstFlowReturn
2687 gst_aggregator_pad_event_func (GstPad * pad, GstObject * parent,
2690 GstFlowReturn ret = GST_FLOW_OK;
2691 GstAggregator *self = GST_AGGREGATOR (parent);
2692 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
2693 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2695 if (GST_EVENT_IS_SERIALIZED (event) && GST_EVENT_TYPE (event) != GST_EVENT_EOS
2696 /* && GST_EVENT_TYPE (event) != GST_EVENT_SEGMENT_DONE */ ) {
2700 if (aggpad->priv->flow_return != GST_FLOW_OK
2701 && GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP) {
2702 ret = aggpad->priv->flow_return;
2706 if (GST_EVENT_TYPE (event) == GST_EVENT_SEGMENT) {
2707 GST_OBJECT_LOCK (aggpad);
2708 gst_event_copy_segment (event, &aggpad->priv->head_segment);
2709 aggpad->priv->head_position = aggpad->priv->head_segment.position;
2710 update_time_level (aggpad, TRUE);
2711 GST_OBJECT_UNLOCK (aggpad);
2714 if (GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP) {
2715 GST_DEBUG_OBJECT (aggpad, "Store event in queue: %" GST_PTR_FORMAT,
2717 g_queue_push_head (&aggpad->priv->buffers, event);
2719 SRC_BROADCAST (self);
2721 PAD_UNLOCK (aggpad);
2726 if (!klass->sink_event (self, aggpad, event)) {
2727 /* Copied from GstPad to convert boolean to a GstFlowReturn in
2728 * the event handling func */
2729 ret = GST_FLOW_ERROR;
2736 GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping event",
2737 gst_flow_get_name (aggpad->priv->flow_return));
2738 PAD_UNLOCK (aggpad);
2740 if (GST_EVENT_IS_STICKY (event))
2741 gst_pad_store_sticky_event (pad, event);
2742 gst_event_unref (event);
2748 gst_aggregator_pad_activate_mode_func (GstPad * pad,
2749 GstObject * parent, GstPadMode mode, gboolean active)
2751 GstAggregator *self = GST_AGGREGATOR (parent);
2752 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
2754 if (active == FALSE) {
2756 gst_aggregator_pad_set_flushing (aggpad, GST_FLOW_FLUSHING, TRUE);
2757 SRC_BROADCAST (self);
2761 aggpad->priv->flow_return = GST_FLOW_OK;
2762 PAD_BROADCAST_EVENT (aggpad);
2763 PAD_UNLOCK (aggpad);
2769 /***********************************
2770 * GstAggregatorPad implementation *
2771 ************************************/
2772 G_DEFINE_TYPE (GstAggregatorPad, gst_aggregator_pad, GST_TYPE_PAD);
2775 gst_aggregator_pad_constructed (GObject * object)
2777 GstPad *pad = GST_PAD (object);
2779 gst_pad_set_chain_function (pad,
2780 GST_DEBUG_FUNCPTR (gst_aggregator_pad_chain));
2781 gst_pad_set_event_full_function_full (pad,
2782 GST_DEBUG_FUNCPTR (gst_aggregator_pad_event_func), NULL, NULL);
2783 gst_pad_set_query_function (pad,
2784 GST_DEBUG_FUNCPTR (gst_aggregator_pad_query_func));
2785 gst_pad_set_activatemode_function (pad,
2786 GST_DEBUG_FUNCPTR (gst_aggregator_pad_activate_mode_func));
2790 gst_aggregator_pad_finalize (GObject * object)
2792 GstAggregatorPad *pad = (GstAggregatorPad *) object;
2794 g_cond_clear (&pad->priv->event_cond);
2795 g_mutex_clear (&pad->priv->flush_lock);
2796 g_mutex_clear (&pad->priv->lock);
2798 G_OBJECT_CLASS (gst_aggregator_pad_parent_class)->finalize (object);
2802 gst_aggregator_pad_dispose (GObject * object)
2804 GstAggregatorPad *pad = (GstAggregatorPad *) object;
2806 gst_aggregator_pad_set_flushing (pad, GST_FLOW_FLUSHING, TRUE);
2808 G_OBJECT_CLASS (gst_aggregator_pad_parent_class)->dispose (object);
2812 gst_aggregator_pad_class_init (GstAggregatorPadClass * klass)
2814 GObjectClass *gobject_class = (GObjectClass *) klass;
2816 g_type_class_add_private (klass, sizeof (GstAggregatorPadPrivate));
2818 gobject_class->constructed = gst_aggregator_pad_constructed;
2819 gobject_class->finalize = gst_aggregator_pad_finalize;
2820 gobject_class->dispose = gst_aggregator_pad_dispose;
2824 gst_aggregator_pad_init (GstAggregatorPad * pad)
2827 G_TYPE_INSTANCE_GET_PRIVATE (pad, GST_TYPE_AGGREGATOR_PAD,
2828 GstAggregatorPadPrivate);
2830 g_queue_init (&pad->priv->buffers);
2831 g_cond_init (&pad->priv->event_cond);
2833 g_mutex_init (&pad->priv->flush_lock);
2834 g_mutex_init (&pad->priv->lock);
2836 gst_aggregator_pad_reset_unlocked (pad);
2837 pad->priv->negotiated = FALSE;
2840 /* Must be called with the PAD_LOCK held */
2842 gst_aggregator_pad_buffer_consumed (GstAggregatorPad * pad)
2844 pad->priv->num_buffers--;
2845 GST_TRACE_OBJECT (pad, "Consuming buffer");
2846 if (gst_aggregator_pad_queue_is_empty (pad) && pad->priv->pending_eos) {
2847 pad->priv->pending_eos = FALSE;
2848 pad->priv->eos = TRUE;
2850 PAD_BROADCAST_EVENT (pad);
2853 /* Must be called with the PAD_LOCK held */
2855 gst_aggregator_pad_clip_buffer_unlocked (GstAggregatorPad * pad)
2857 GstAggregator *self = NULL;
2858 GstAggregatorClass *aggclass;
2859 GstBuffer *buffer = NULL;
2861 while (pad->priv->clipped_buffer == NULL &&
2862 GST_IS_BUFFER (g_queue_peek_tail (&pad->priv->buffers))) {
2863 buffer = g_queue_pop_tail (&pad->priv->buffers);
2865 apply_buffer (pad, buffer, FALSE);
2867 /* We only take the parent here so that it's not taken if the buffer is
2868 * already clipped or if the queue is empty.
2871 self = GST_AGGREGATOR (gst_pad_get_parent_element (GST_PAD (pad)));
2873 gst_buffer_unref (buffer);
2877 aggclass = GST_AGGREGATOR_GET_CLASS (self);
2880 if (aggclass->clip) {
2881 GST_TRACE_OBJECT (pad, "Clipping: %" GST_PTR_FORMAT, buffer);
2883 buffer = aggclass->clip (self, pad, buffer);
2885 if (buffer == NULL) {
2886 gst_aggregator_pad_buffer_consumed (pad);
2887 GST_TRACE_OBJECT (pad, "Clipping consumed the buffer");
2891 pad->priv->clipped_buffer = buffer;
2895 gst_object_unref (self);
2899 * gst_aggregator_pad_steal_buffer:
2900 * @pad: the pad to get buffer from
2902 * Steal the ref to the buffer currently queued in @pad.
2904 * Returns: (transfer full): The buffer in @pad or NULL if no buffer was
2905 * queued. You should unref the buffer after usage.
2908 gst_aggregator_pad_steal_buffer (GstAggregatorPad * pad)
2914 gst_aggregator_pad_clip_buffer_unlocked (pad);
2916 buffer = pad->priv->clipped_buffer;
2917 pad->priv->clipped_buffer = NULL;
2920 gst_aggregator_pad_buffer_consumed (pad);
2921 GST_DEBUG_OBJECT (pad, "Consumed: %" GST_PTR_FORMAT, buffer);
2930 * gst_aggregator_pad_drop_buffer:
2931 * @pad: the pad where to drop any pending buffer
2933 * Drop the buffer currently queued in @pad.
2935 * Returns: TRUE if there was a buffer queued in @pad, or FALSE if not.
2938 gst_aggregator_pad_drop_buffer (GstAggregatorPad * pad)
2942 buf = gst_aggregator_pad_steal_buffer (pad);
2947 gst_buffer_unref (buf);
2952 * gst_aggregator_pad_get_buffer:
2953 * @pad: the pad to get buffer from
2955 * Returns: (transfer full): A reference to the buffer in @pad or
2956 * NULL if no buffer was queued. You should unref the buffer after
2960 gst_aggregator_pad_get_buffer (GstAggregatorPad * pad)
2966 gst_aggregator_pad_clip_buffer_unlocked (pad);
2968 if (pad->priv->clipped_buffer) {
2969 buffer = gst_buffer_ref (pad->priv->clipped_buffer);
2979 gst_aggregator_pad_is_eos (GstAggregatorPad * pad)
2984 is_eos = pad->priv->eos;
2991 * gst_aggregator_merge_tags:
2992 * @self: a #GstAggregator
2993 * @tags: a #GstTagList to merge
2994 * @mode: the #GstTagMergeMode to use
2996 * Adds tags to so-called pending tags, which will be processed
2997 * before pushing out data downstream.
2999 * Note that this is provided for convenience, and the subclass is
3000 * not required to use this and can still do tag handling on its own.
3005 gst_aggregator_merge_tags (GstAggregator * self,
3006 const GstTagList * tags, GstTagMergeMode mode)
3010 g_return_if_fail (GST_IS_AGGREGATOR (self));
3011 g_return_if_fail (tags == NULL || GST_IS_TAG_LIST (tags));
3013 /* FIXME Check if we can use OBJECT lock here! */
3014 GST_OBJECT_LOCK (self);
3016 GST_DEBUG_OBJECT (self, "merging tags %" GST_PTR_FORMAT, tags);
3017 otags = self->priv->tags;
3018 self->priv->tags = gst_tag_list_merge (self->priv->tags, tags, mode);
3020 gst_tag_list_unref (otags);
3021 self->priv->tags_changed = TRUE;
3022 GST_OBJECT_UNLOCK (self);
3026 * gst_aggregator_set_latency:
3027 * @self: a #GstAggregator
3028 * @min_latency: minimum latency
3029 * @max_latency: maximum latency
3031 * Lets #GstAggregator sub-classes tell the baseclass what their internal
3032 * latency is. Will also post a LATENCY message on the bus so the pipeline
3033 * can reconfigure its global latency.
3036 gst_aggregator_set_latency (GstAggregator * self,
3037 GstClockTime min_latency, GstClockTime max_latency)
3039 gboolean changed = FALSE;
3041 g_return_if_fail (GST_IS_AGGREGATOR (self));
3042 g_return_if_fail (GST_CLOCK_TIME_IS_VALID (min_latency));
3043 g_return_if_fail (max_latency >= min_latency);
3046 if (self->priv->sub_latency_min != min_latency) {
3047 self->priv->sub_latency_min = min_latency;
3050 if (self->priv->sub_latency_max != max_latency) {
3051 self->priv->sub_latency_max = max_latency;
3056 SRC_BROADCAST (self);
3060 gst_element_post_message (GST_ELEMENT_CAST (self),
3061 gst_message_new_latency (GST_OBJECT_CAST (self)));
3066 * gst_aggregator_get_buffer_pool:
3067 * @self: a #GstAggregator
3069 * Returns: (transfer full): the instance of the #GstBufferPool used
3070 * by @trans; free it after use it
3073 gst_aggregator_get_buffer_pool (GstAggregator * self)
3075 GstBufferPool *pool;
3077 g_return_val_if_fail (GST_IS_AGGREGATOR (self), NULL);
3079 GST_OBJECT_LOCK (self);
3080 pool = self->priv->pool;
3082 gst_object_ref (pool);
3083 GST_OBJECT_UNLOCK (self);
3089 * gst_aggregator_get_allocator:
3090 * @self: a #GstAggregator
3091 * @allocator: (out) (allow-none) (transfer full): the #GstAllocator
3093 * @params: (out) (allow-none) (transfer full): the
3094 * #GstAllocationParams of @allocator
3096 * Lets #GstAggregator sub-classes get the memory @allocator
3097 * acquired by the base class and its @params.
3099 * Unref the @allocator after use it.
3102 gst_aggregator_get_allocator (GstAggregator * self,
3103 GstAllocator ** allocator, GstAllocationParams * params)
3105 g_return_if_fail (GST_IS_AGGREGATOR (self));
3108 *allocator = self->priv->allocator ?
3109 gst_object_ref (self->priv->allocator) : NULL;
3112 *params = self->priv->allocation_params;