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, the 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;
214 GQueue data; /* buffers, events and queries */
215 GstBuffer *clipped_buffer;
217 GstClockTime head_position;
218 GstClockTime tail_position;
219 GstClockTime head_time; /* running time */
220 GstClockTime tail_time;
221 GstClockTime time_level; /* how much head is ahead of tail */
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 */
323 /* Seek event forwarding helper */
329 gboolean only_to_active_pads;
333 gboolean one_actually_seeked;
336 #define DEFAULT_LATENCY 0
337 #define DEFAULT_START_TIME_SELECTION GST_AGGREGATOR_START_TIME_SELECTION_ZERO
338 #define DEFAULT_START_TIME (-1)
344 PROP_START_TIME_SELECTION,
349 static GstFlowReturn gst_aggregator_pad_chain_internal (GstAggregator * self,
350 GstAggregatorPad * aggpad, GstBuffer * buffer, gboolean head);
353 * gst_aggregator_iterate_sinkpads:
354 * @self: The #GstAggregator
355 * @func: (scope call): The function to call.
356 * @user_data: (closure): The data to pass to @func.
358 * Iterate the sinkpads of aggregator to call a function on them.
360 * This method guarantees that @func will be called only once for each
363 * Returns: %FALSE if there are no sinkpads or if @func returned %FALSE
366 gst_aggregator_iterate_sinkpads (GstAggregator * self,
367 GstAggregatorPadForeachFunc func, gpointer user_data)
369 gboolean result = FALSE;
371 gboolean done = FALSE;
372 GValue item = { 0, };
373 GList *seen_pads = NULL;
375 iter = gst_element_iterate_sink_pads (GST_ELEMENT (self));
381 switch (gst_iterator_next (iter, &item)) {
382 case GST_ITERATOR_OK:
384 GstAggregatorPad *pad;
386 pad = g_value_get_object (&item);
388 /* if already pushed, skip. FIXME, find something faster to tag pads */
389 if (pad == NULL || g_list_find (seen_pads, pad)) {
390 g_value_reset (&item);
394 GST_LOG_OBJECT (pad, "calling function %s on pad",
395 GST_DEBUG_FUNCPTR_NAME (func));
397 result = func (self, pad, user_data);
401 seen_pads = g_list_prepend (seen_pads, pad);
403 g_value_reset (&item);
406 case GST_ITERATOR_RESYNC:
407 gst_iterator_resync (iter);
409 case GST_ITERATOR_ERROR:
410 GST_ERROR_OBJECT (self,
411 "Could not iterate over internally linked pads");
414 case GST_ITERATOR_DONE:
419 g_value_unset (&item);
420 gst_iterator_free (iter);
422 if (seen_pads == NULL) {
423 GST_DEBUG_OBJECT (self, "No pad seen");
427 g_list_free (seen_pads);
434 gst_aggregator_pad_queue_is_empty (GstAggregatorPad * pad)
436 return (g_queue_peek_tail (&pad->priv->data) == NULL &&
437 pad->priv->clipped_buffer == NULL);
441 gst_aggregator_check_pads_ready (GstAggregator * self)
443 GstAggregatorPad *pad;
445 gboolean have_buffer = TRUE;
446 gboolean have_event = FALSE;
448 GST_LOG_OBJECT (self, "checking pads");
450 GST_OBJECT_LOCK (self);
452 sinkpads = GST_ELEMENT_CAST (self)->sinkpads;
453 if (sinkpads == NULL)
456 for (l = sinkpads; l != NULL; l = l->next) {
461 if (pad->priv->num_buffers == 0) {
462 if (!gst_aggregator_pad_queue_is_empty (pad))
464 if (!pad->priv->eos) {
467 /* If not live we need data on all pads, so leave the loop */
468 if (!self->priv->peer_latency_live) {
473 } else if (self->priv->peer_latency_live) {
474 /* In live mode, having a single pad with buffers is enough to
475 * generate a start time from it. In non-live mode all pads need
478 self->priv->first_buffer = FALSE;
484 if (!have_buffer && !have_event)
488 self->priv->first_buffer = FALSE;
490 GST_OBJECT_UNLOCK (self);
491 GST_LOG_OBJECT (self, "pads are ready");
496 GST_LOG_OBJECT (self, "pads not ready: no sink pads");
497 GST_OBJECT_UNLOCK (self);
503 GST_LOG_OBJECT (pad, "pad not ready to be aggregated yet,"
504 " but waking up for serialized event");
506 GST_LOG_OBJECT (pad, "pad not ready to be aggregated yet");
507 GST_OBJECT_UNLOCK (self);
513 gst_aggregator_reset_flow_values (GstAggregator * self)
515 GST_OBJECT_LOCK (self);
516 self->priv->send_stream_start = TRUE;
517 self->priv->send_segment = TRUE;
518 gst_segment_init (&self->segment, GST_FORMAT_TIME);
519 self->priv->first_buffer = TRUE;
520 GST_OBJECT_UNLOCK (self);
524 gst_aggregator_push_mandatory_events (GstAggregator * self)
526 GstAggregatorPrivate *priv = self->priv;
527 GstEvent *segment = NULL;
528 GstEvent *tags = NULL;
530 if (self->priv->send_stream_start) {
533 GST_INFO_OBJECT (self, "pushing stream start");
534 /* stream-start (FIXME: create id based on input ids) */
535 g_snprintf (s_id, sizeof (s_id), "agg-%08x", g_random_int ());
536 if (!gst_pad_push_event (self->srcpad, gst_event_new_stream_start (s_id))) {
537 GST_WARNING_OBJECT (self->srcpad, "Sending stream start event failed");
539 self->priv->send_stream_start = FALSE;
542 if (self->priv->srccaps) {
544 GST_INFO_OBJECT (self, "pushing caps: %" GST_PTR_FORMAT,
545 self->priv->srccaps);
546 if (!gst_pad_push_event (self->srcpad,
547 gst_event_new_caps (self->priv->srccaps))) {
548 GST_WARNING_OBJECT (self->srcpad, "Sending caps event failed");
550 gst_caps_unref (self->priv->srccaps);
551 self->priv->srccaps = NULL;
554 GST_OBJECT_LOCK (self);
555 if (self->priv->send_segment && !self->priv->flush_seeking) {
556 segment = gst_event_new_segment (&self->segment);
558 if (!self->priv->seqnum)
559 self->priv->seqnum = gst_event_get_seqnum (segment);
561 gst_event_set_seqnum (segment, self->priv->seqnum);
562 self->priv->send_segment = FALSE;
564 GST_DEBUG_OBJECT (self, "pushing segment %" GST_PTR_FORMAT, segment);
567 if (priv->tags && priv->tags_changed && !self->priv->flush_seeking) {
568 tags = gst_event_new_tag (gst_tag_list_ref (priv->tags));
569 priv->tags_changed = FALSE;
571 GST_OBJECT_UNLOCK (self);
574 gst_pad_push_event (self->srcpad, segment);
576 gst_pad_push_event (self->srcpad, tags);
581 * gst_aggregator_set_src_caps:
582 * @self: The #GstAggregator
583 * @caps: The #GstCaps to set on the src pad.
585 * Sets the caps to be used on the src pad.
588 gst_aggregator_set_src_caps (GstAggregator * self, GstCaps * caps)
590 GST_PAD_STREAM_LOCK (self->srcpad);
591 gst_caps_replace (&self->priv->srccaps, caps);
592 gst_aggregator_push_mandatory_events (self);
593 GST_PAD_STREAM_UNLOCK (self->srcpad);
597 * gst_aggregator_finish_buffer:
598 * @self: The #GstAggregator
599 * @buffer: (transfer full): the #GstBuffer to push.
601 * This method will push the provided output buffer downstream. If needed,
602 * mandatory events such as stream-start, caps, and segment events will be
603 * sent before pushing the buffer.
606 gst_aggregator_finish_buffer (GstAggregator * self, GstBuffer * buffer)
608 gst_aggregator_push_mandatory_events (self);
610 GST_OBJECT_LOCK (self);
611 if (!self->priv->flush_seeking && gst_pad_is_active (self->srcpad)) {
612 GST_TRACE_OBJECT (self, "pushing buffer %" GST_PTR_FORMAT, buffer);
613 GST_OBJECT_UNLOCK (self);
614 return gst_pad_push (self->srcpad, buffer);
616 GST_INFO_OBJECT (self, "Not pushing (active: %i, flushing: %i)",
617 self->priv->flush_seeking, gst_pad_is_active (self->srcpad));
618 GST_OBJECT_UNLOCK (self);
619 gst_buffer_unref (buffer);
625 gst_aggregator_push_eos (GstAggregator * self)
628 gst_aggregator_push_mandatory_events (self);
630 event = gst_event_new_eos ();
632 GST_OBJECT_LOCK (self);
633 self->priv->send_eos = FALSE;
634 gst_event_set_seqnum (event, self->priv->seqnum);
635 GST_OBJECT_UNLOCK (self);
637 gst_pad_push_event (self->srcpad, event);
641 gst_aggregator_get_next_time (GstAggregator * self)
643 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
645 if (klass->get_next_time)
646 return klass->get_next_time (self);
648 return GST_CLOCK_TIME_NONE;
652 gst_aggregator_wait_and_check (GstAggregator * self, gboolean * timeout)
654 GstClockTime latency;
662 latency = gst_aggregator_get_latency_unlocked (self);
664 if (gst_aggregator_check_pads_ready (self)) {
665 GST_DEBUG_OBJECT (self, "all pads have data");
671 /* Before waiting, check if we're actually still running */
672 if (!self->priv->running || !self->priv->send_eos) {
678 start = gst_aggregator_get_next_time (self);
680 /* If we're not live, or if we use the running time
681 * of the first buffer as start time, we wait until
682 * all pads have buffers.
683 * Otherwise (i.e. if we are live!), we wait on the clock
684 * and if a pad does not have a buffer in time we ignore
687 GST_OBJECT_LOCK (self);
688 if (!GST_CLOCK_TIME_IS_VALID (latency) ||
689 !GST_IS_CLOCK (GST_ELEMENT_CLOCK (self)) ||
690 !GST_CLOCK_TIME_IS_VALID (start) ||
691 (self->priv->first_buffer
692 && self->priv->start_time_selection ==
693 GST_AGGREGATOR_START_TIME_SELECTION_FIRST)) {
694 /* We wake up here when something happened, and below
695 * then check if we're ready now. If we return FALSE,
696 * we will be directly called again.
698 GST_OBJECT_UNLOCK (self);
701 GstClockTime base_time, time;
703 GstClockReturn status;
704 GstClockTimeDiff jitter;
706 GST_DEBUG_OBJECT (self, "got subclass start time: %" GST_TIME_FORMAT,
707 GST_TIME_ARGS (start));
709 base_time = GST_ELEMENT_CAST (self)->base_time;
710 clock = gst_object_ref (GST_ELEMENT_CLOCK (self));
711 GST_OBJECT_UNLOCK (self);
713 time = base_time + start;
716 GST_DEBUG_OBJECT (self, "possibly waiting for clock to reach %"
717 GST_TIME_FORMAT " (base %" GST_TIME_FORMAT " start %" GST_TIME_FORMAT
718 " latency %" GST_TIME_FORMAT " current %" GST_TIME_FORMAT ")",
719 GST_TIME_ARGS (time),
720 GST_TIME_ARGS (base_time),
721 GST_TIME_ARGS (start), GST_TIME_ARGS (latency),
722 GST_TIME_ARGS (gst_clock_get_time (clock)));
724 self->priv->aggregate_id = gst_clock_new_single_shot_id (clock, time);
725 gst_object_unref (clock);
729 status = gst_clock_id_wait (self->priv->aggregate_id, &jitter);
732 if (self->priv->aggregate_id) {
733 gst_clock_id_unref (self->priv->aggregate_id);
734 self->priv->aggregate_id = NULL;
737 GST_DEBUG_OBJECT (self,
738 "clock returned %d (jitter: %" GST_STIME_FORMAT ")",
739 status, GST_STIME_ARGS (jitter));
742 if (status == GST_CLOCK_OK || status == GST_CLOCK_EARLY) {
749 res = gst_aggregator_check_pads_ready (self);
756 gst_aggregator_do_events_and_queries (GstAggregator * self,
757 GstAggregatorPad * pad, gpointer user_data)
759 GstEvent *event = NULL;
760 GstQuery *query = NULL;
761 GstAggregatorClass *klass = NULL;
762 gboolean *processed_event = user_data;
769 if (pad->priv->num_buffers == 0 && pad->priv->pending_eos) {
770 pad->priv->pending_eos = FALSE;
771 pad->priv->eos = TRUE;
773 if (pad->priv->clipped_buffer == NULL &&
774 !GST_IS_BUFFER (g_queue_peek_tail (&pad->priv->data))) {
775 if (GST_IS_EVENT (g_queue_peek_tail (&pad->priv->data)))
776 event = gst_event_ref (g_queue_peek_tail (&pad->priv->data));
777 if (GST_IS_QUERY (g_queue_peek_tail (&pad->priv->data)))
778 query = g_queue_peek_tail (&pad->priv->data);
781 if (event || query) {
785 *processed_event = TRUE;
787 klass = GST_AGGREGATOR_GET_CLASS (self);
790 GST_LOG_OBJECT (pad, "Processing %" GST_PTR_FORMAT, event);
791 gst_event_ref (event);
792 ret = klass->sink_event (self, pad, event);
795 if (GST_EVENT_TYPE (event) == GST_EVENT_CAPS)
796 pad->priv->negotiated = ret;
797 if (g_queue_peek_tail (&pad->priv->data) == event)
798 gst_event_unref (g_queue_pop_tail (&pad->priv->data));
799 gst_event_unref (event);
801 GST_LOG_OBJECT (pad, "Processing %" GST_PTR_FORMAT, query);
802 ret = klass->sink_query (self, pad, query);
805 if (g_queue_peek_tail (&pad->priv->data) == query) {
808 s = gst_query_writable_structure (query);
809 gst_structure_set (s, "gst-aggregator-retval", G_TYPE_BOOLEAN, ret,
811 g_queue_pop_tail (&pad->priv->data);
815 PAD_BROADCAST_EVENT (pad);
818 } while (event || query);
824 gst_aggregator_pad_set_flushing (GstAggregatorPad * aggpad,
825 GstFlowReturn flow_return, gboolean full)
830 if (flow_return == GST_FLOW_NOT_LINKED)
831 aggpad->priv->flow_return = MIN (flow_return, aggpad->priv->flow_return);
833 aggpad->priv->flow_return = flow_return;
835 item = g_queue_peek_head_link (&aggpad->priv->data);
837 GList *next = item->next;
839 /* In partial flush, we do like the pad, we get rid of non-sticky events
842 if (full || GST_IS_BUFFER (item->data) ||
843 GST_EVENT_TYPE (item->data) == GST_EVENT_EOS ||
844 GST_EVENT_TYPE (item->data) == GST_EVENT_SEGMENT ||
845 !GST_EVENT_IS_STICKY (item->data)) {
846 if (!GST_IS_QUERY (item->data))
847 gst_mini_object_unref (item->data);
848 g_queue_delete_link (&aggpad->priv->data, item);
852 aggpad->priv->num_buffers = 0;
853 gst_buffer_replace (&aggpad->priv->clipped_buffer, NULL);
855 PAD_BROADCAST_EVENT (aggpad);
860 gst_aggregator_default_update_src_caps (GstAggregator * agg, GstCaps * caps,
863 *ret = gst_caps_ref (caps);
869 gst_aggregator_default_fixate_src_caps (GstAggregator * agg, GstCaps * caps)
871 caps = gst_caps_fixate (caps);
877 gst_aggregator_default_negotiated_src_caps (GstAggregator * agg, GstCaps * caps)
883 /* takes ownership of the pool, allocator and query */
885 gst_aggregator_set_allocation (GstAggregator * self,
886 GstBufferPool * pool, GstAllocator * allocator,
887 GstAllocationParams * params, GstQuery * query)
889 GstAllocator *oldalloc;
890 GstBufferPool *oldpool;
893 GST_DEBUG ("storing allocation query");
895 GST_OBJECT_LOCK (self);
896 oldpool = self->priv->pool;
897 self->priv->pool = pool;
899 oldalloc = self->priv->allocator;
900 self->priv->allocator = allocator;
902 oldquery = self->priv->allocation_query;
903 self->priv->allocation_query = query;
906 self->priv->allocation_params = *params;
908 gst_allocation_params_init (&self->priv->allocation_params);
909 GST_OBJECT_UNLOCK (self);
912 GST_DEBUG_OBJECT (self, "deactivating old pool %p", oldpool);
913 gst_buffer_pool_set_active (oldpool, FALSE);
914 gst_object_unref (oldpool);
917 gst_object_unref (oldalloc);
920 gst_query_unref (oldquery);
927 gst_aggregator_decide_allocation (GstAggregator * self, GstQuery * query)
929 GstAggregatorClass *aggclass = GST_AGGREGATOR_GET_CLASS (self);
931 if (aggclass->decide_allocation)
932 if (!aggclass->decide_allocation (self, query))
939 gst_aggregator_do_allocation (GstAggregator * self, GstCaps * caps)
942 gboolean result = TRUE;
943 GstBufferPool *pool = NULL;
944 GstAllocator *allocator;
945 GstAllocationParams params;
947 /* find a pool for the negotiated caps now */
948 GST_DEBUG_OBJECT (self, "doing allocation query");
949 query = gst_query_new_allocation (caps, TRUE);
950 if (!gst_pad_peer_query (self->srcpad, query)) {
951 /* not a problem, just debug a little */
952 GST_DEBUG_OBJECT (self, "peer ALLOCATION query failed");
955 GST_DEBUG_OBJECT (self, "calling decide_allocation");
956 result = gst_aggregator_decide_allocation (self, query);
958 GST_DEBUG_OBJECT (self, "ALLOCATION (%d) params: %" GST_PTR_FORMAT, result,
962 goto no_decide_allocation;
964 /* we got configuration from our peer or the decide_allocation method,
966 if (gst_query_get_n_allocation_params (query) > 0) {
967 gst_query_parse_nth_allocation_param (query, 0, &allocator, ¶ms);
970 gst_allocation_params_init (¶ms);
973 if (gst_query_get_n_allocation_pools (query) > 0)
974 gst_query_parse_nth_allocation_pool (query, 0, &pool, NULL, NULL, NULL);
978 gst_aggregator_set_allocation (self, pool, allocator, ¶ms, query);
983 no_decide_allocation:
985 GST_WARNING_OBJECT (self, "Failed to decide allocation");
986 gst_query_unref (query);
993 /* WITH SRC_LOCK held */
995 gst_aggregator_update_src_caps (GstAggregator * self)
997 GstAggregatorClass *agg_klass = GST_AGGREGATOR_GET_CLASS (self);
998 GstCaps *downstream_caps, *template_caps, *caps = NULL;
999 GstFlowReturn ret = GST_FLOW_OK;
1001 template_caps = gst_pad_get_pad_template_caps (self->srcpad);
1002 downstream_caps = gst_pad_peer_query_caps (self->srcpad, template_caps);
1004 if (gst_caps_is_empty (downstream_caps)) {
1005 GST_INFO_OBJECT (self, "Downstream caps (%"
1006 GST_PTR_FORMAT ") not compatible with pad template caps (%"
1007 GST_PTR_FORMAT ")", downstream_caps, template_caps);
1008 ret = GST_FLOW_NOT_NEGOTIATED;
1012 g_assert (agg_klass->update_src_caps);
1013 GST_DEBUG_OBJECT (self, "updating caps from %" GST_PTR_FORMAT,
1015 ret = agg_klass->update_src_caps (self, downstream_caps, &caps);
1016 if (ret < GST_FLOW_OK) {
1017 GST_WARNING_OBJECT (self, "Subclass failed to update provided caps");
1020 if ((caps == NULL || gst_caps_is_empty (caps)) && ret >= GST_FLOW_OK) {
1021 ret = GST_FLOW_NOT_NEGOTIATED;
1024 GST_DEBUG_OBJECT (self, " to %" GST_PTR_FORMAT, caps);
1026 #ifdef GST_ENABLE_EXTRA_CHECKS
1027 if (!gst_caps_is_subset (caps, template_caps)) {
1028 GstCaps *intersection;
1030 GST_ERROR_OBJECT (self,
1031 "update_src_caps returned caps %" GST_PTR_FORMAT
1032 " which are not a real subset of the template caps %"
1033 GST_PTR_FORMAT, caps, template_caps);
1034 g_warning ("%s: update_src_caps returned caps which are not a real "
1035 "subset of the filter caps", GST_ELEMENT_NAME (self));
1038 gst_caps_intersect_full (template_caps, caps, GST_CAPS_INTERSECT_FIRST);
1039 gst_caps_unref (caps);
1040 caps = intersection;
1044 if (gst_caps_is_any (caps)) {
1048 if (!gst_caps_is_fixed (caps)) {
1049 g_assert (agg_klass->fixate_src_caps);
1051 GST_DEBUG_OBJECT (self, "fixate caps from %" GST_PTR_FORMAT, caps);
1052 if (!(caps = agg_klass->fixate_src_caps (self, caps))) {
1053 GST_WARNING_OBJECT (self, "Subclass failed to fixate provided caps");
1054 ret = GST_FLOW_NOT_NEGOTIATED;
1057 GST_DEBUG_OBJECT (self, " to %" GST_PTR_FORMAT, caps);
1060 if (agg_klass->negotiated_src_caps) {
1061 if (!agg_klass->negotiated_src_caps (self, caps)) {
1062 GST_WARNING_OBJECT (self, "Subclass failed to accept negotiated caps");
1063 ret = GST_FLOW_NOT_NEGOTIATED;
1068 gst_aggregator_set_src_caps (self, caps);
1070 if (!gst_aggregator_do_allocation (self, caps)) {
1071 GST_WARNING_OBJECT (self, "Allocation negotiation failed");
1072 ret = GST_FLOW_NOT_NEGOTIATED;
1076 gst_caps_unref (downstream_caps);
1077 gst_caps_unref (template_caps);
1080 gst_caps_unref (caps);
1086 gst_aggregator_aggregate_func (GstAggregator * self)
1088 GstAggregatorPrivate *priv = self->priv;
1089 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
1090 gboolean timeout = FALSE;
1092 if (self->priv->running == FALSE) {
1093 GST_DEBUG_OBJECT (self, "Not running anymore");
1097 GST_LOG_OBJECT (self, "Checking aggregate");
1098 while (priv->send_eos && priv->running) {
1099 GstFlowReturn flow_return = GST_FLOW_OK;
1100 gboolean processed_event = FALSE;
1102 gst_aggregator_iterate_sinkpads (self, gst_aggregator_do_events_and_queries,
1105 if (!gst_aggregator_wait_and_check (self, &timeout))
1108 gst_aggregator_iterate_sinkpads (self, gst_aggregator_do_events_and_queries,
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 GST_DEBUG_OBJECT (aggpad, "Got event: %" GST_PTR_FORMAT, event);
1368 switch (GST_EVENT_TYPE (event)) {
1369 case GST_EVENT_FLUSH_START:
1371 gst_aggregator_flush_start (self, aggpad, event);
1372 /* We forward only in one case: right after flush_seeking */
1376 case GST_EVENT_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 /* We still have a buffer, and we don't want the subclass to have to
1410 * check for it. Mark pending_eos, eos will be set when steal_buffer is
1415 if (aggpad->priv->num_buffers == 0) {
1416 aggpad->priv->eos = TRUE;
1418 aggpad->priv->pending_eos = TRUE;
1420 PAD_UNLOCK (aggpad);
1422 SRC_BROADCAST (self);
1426 case GST_EVENT_SEGMENT:
1429 GST_OBJECT_LOCK (aggpad);
1430 gst_event_copy_segment (event, &aggpad->segment);
1431 /* We've got a new segment, tail_position is now meaningless
1432 * and may interfere with the time_level calculation
1434 aggpad->priv->tail_position = GST_CLOCK_TIME_NONE;
1435 update_time_level (aggpad, FALSE);
1436 GST_OBJECT_UNLOCK (aggpad);
1437 PAD_UNLOCK (aggpad);
1439 GST_OBJECT_LOCK (self);
1440 self->priv->seqnum = gst_event_get_seqnum (event);
1441 GST_OBJECT_UNLOCK (self);
1444 case GST_EVENT_STREAM_START:
1450 GstClockTime pts, endpts;
1451 GstClockTime duration;
1454 gst_event_parse_gap (event, &pts, &duration);
1455 gapbuf = gst_buffer_new ();
1457 if (GST_CLOCK_TIME_IS_VALID (duration))
1458 endpts = pts + duration;
1460 endpts = GST_CLOCK_TIME_NONE;
1462 GST_OBJECT_LOCK (aggpad);
1463 res = gst_segment_clip (&aggpad->segment, GST_FORMAT_TIME, pts, endpts,
1465 GST_OBJECT_UNLOCK (aggpad);
1468 GST_WARNING_OBJECT (self, "GAP event outside segment, dropping");
1472 if (GST_CLOCK_TIME_IS_VALID (endpts) && GST_CLOCK_TIME_IS_VALID (pts))
1473 duration = endpts - pts;
1475 duration = GST_CLOCK_TIME_NONE;
1477 GST_BUFFER_PTS (gapbuf) = pts;
1478 GST_BUFFER_DURATION (gapbuf) = duration;
1479 GST_BUFFER_FLAG_SET (gapbuf, GST_BUFFER_FLAG_GAP);
1480 GST_BUFFER_FLAG_SET (gapbuf, GST_BUFFER_FLAG_DROPPABLE);
1482 /* Remove GAP event so we can replace it with the buffer */
1483 if (g_queue_peek_tail (&aggpad->priv->data) == event)
1484 gst_event_unref (g_queue_pop_tail (&aggpad->priv->data));
1486 if (gst_aggregator_pad_chain_internal (self, aggpad, gapbuf, FALSE) !=
1488 GST_WARNING_OBJECT (self, "Failed to chain gap buffer");
1498 gst_event_parse_tag (event, &tags);
1500 if (gst_tag_list_get_scope (tags) == GST_TAG_SCOPE_STREAM) {
1501 gst_aggregator_merge_tags (self, tags, GST_TAG_MERGE_REPLACE);
1502 gst_event_unref (event);
1514 GST_DEBUG_OBJECT (pad, "Forwarding event: %" GST_PTR_FORMAT, event);
1515 return gst_pad_event_default (pad, GST_OBJECT (self), event);
1518 GST_DEBUG_OBJECT (pad, "Eating event: %" GST_PTR_FORMAT, event);
1520 gst_event_unref (event);
1525 static inline gboolean
1526 gst_aggregator_stop_pad (GstAggregator * self, GstAggregatorPad * pad,
1527 gpointer unused_udata)
1529 gst_aggregator_pad_flush (pad, self);
1532 pad->priv->flow_return = GST_FLOW_FLUSHING;
1533 pad->priv->negotiated = FALSE;
1534 PAD_BROADCAST_EVENT (pad);
1541 gst_aggregator_stop (GstAggregator * agg)
1543 GstAggregatorClass *klass;
1546 gst_aggregator_reset_flow_values (agg);
1548 gst_aggregator_iterate_sinkpads (agg, gst_aggregator_stop_pad, NULL);
1550 klass = GST_AGGREGATOR_GET_CLASS (agg);
1553 result = klass->stop (agg);
1557 agg->priv->has_peer_latency = FALSE;
1558 agg->priv->peer_latency_live = FALSE;
1559 agg->priv->peer_latency_min = agg->priv->peer_latency_max = FALSE;
1561 if (agg->priv->tags)
1562 gst_tag_list_unref (agg->priv->tags);
1563 agg->priv->tags = NULL;
1565 gst_aggregator_set_allocation (agg, NULL, NULL, NULL, NULL);
1570 /* GstElement vmethods implementations */
1571 static GstStateChangeReturn
1572 gst_aggregator_change_state (GstElement * element, GstStateChange transition)
1574 GstStateChangeReturn ret;
1575 GstAggregator *self = GST_AGGREGATOR (element);
1577 switch (transition) {
1578 case GST_STATE_CHANGE_READY_TO_PAUSED:
1579 if (!gst_aggregator_start (self))
1587 GST_ELEMENT_CLASS (aggregator_parent_class)->change_state (element,
1588 transition)) == GST_STATE_CHANGE_FAILURE)
1592 switch (transition) {
1593 case GST_STATE_CHANGE_PAUSED_TO_READY:
1594 if (!gst_aggregator_stop (self)) {
1595 /* What to do in this case? Error out? */
1596 GST_ERROR_OBJECT (self, "Subclass failed to stop.");
1608 GST_ERROR_OBJECT (element, "parent failed state change");
1613 GST_ERROR_OBJECT (element, "Subclass failed to start");
1614 return GST_STATE_CHANGE_FAILURE;
1619 gst_aggregator_release_pad (GstElement * element, GstPad * pad)
1621 GstAggregator *self = GST_AGGREGATOR (element);
1622 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
1624 GST_INFO_OBJECT (pad, "Removing pad");
1627 gst_aggregator_pad_set_flushing (aggpad, GST_FLOW_FLUSHING, TRUE);
1628 gst_element_remove_pad (element, pad);
1630 self->priv->has_peer_latency = FALSE;
1631 SRC_BROADCAST (self);
1635 static GstAggregatorPad *
1636 gst_aggregator_default_create_new_pad (GstAggregator * self,
1637 GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
1639 GstAggregatorPad *agg_pad;
1640 GstAggregatorPrivate *priv = self->priv;
1644 if (templ->direction != GST_PAD_SINK)
1647 if (templ->presence != GST_PAD_REQUEST)
1650 GST_OBJECT_LOCK (self);
1651 if (req_name == NULL || strlen (req_name) < 6
1652 || !g_str_has_prefix (req_name, "sink_")) {
1653 /* no name given when requesting the pad, use next available int */
1654 serial = ++priv->max_padserial;
1656 /* parse serial number from requested padname */
1657 serial = g_ascii_strtoull (&req_name[5], NULL, 10);
1658 if (serial > priv->max_padserial)
1659 priv->max_padserial = serial;
1662 name = g_strdup_printf ("sink_%u", serial);
1663 agg_pad = g_object_new (GST_AGGREGATOR_GET_CLASS (self)->sinkpads_type,
1664 "name", name, "direction", GST_PAD_SINK, "template", templ, NULL);
1667 GST_OBJECT_UNLOCK (self);
1674 GST_WARNING_OBJECT (self, "request new pad that is not a SINK pad");
1679 GST_WARNING_OBJECT (self, "request new pad that is not a REQUEST pad");
1685 gst_aggregator_request_new_pad (GstElement * element,
1686 GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
1688 GstAggregator *self;
1689 GstAggregatorPad *agg_pad;
1690 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (element);
1691 GstAggregatorPrivate *priv = GST_AGGREGATOR (element)->priv;
1693 self = GST_AGGREGATOR (element);
1695 agg_pad = klass->create_new_pad (self, templ, req_name, caps);
1697 GST_ERROR_OBJECT (element, "Couldn't create new pad");
1701 GST_DEBUG_OBJECT (element, "Adding pad %s", GST_PAD_NAME (agg_pad));
1704 gst_pad_set_active (GST_PAD (agg_pad), TRUE);
1706 /* add the pad to the element */
1707 gst_element_add_pad (element, GST_PAD (agg_pad));
1709 return GST_PAD (agg_pad);
1712 /* Must be called with SRC_LOCK held */
1715 gst_aggregator_query_latency_unlocked (GstAggregator * self, GstQuery * query)
1717 gboolean query_ret, live;
1718 GstClockTime our_latency, min, max;
1720 query_ret = gst_pad_query_default (self->srcpad, GST_OBJECT (self), query);
1723 GST_WARNING_OBJECT (self, "Latency query failed");
1727 gst_query_parse_latency (query, &live, &min, &max);
1729 our_latency = self->priv->latency;
1731 if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (min))) {
1732 GST_ERROR_OBJECT (self, "Invalid minimum latency %" GST_TIME_FORMAT
1733 ". Please file a bug at " PACKAGE_BUGREPORT ".", GST_TIME_ARGS (min));
1737 if (min > max && GST_CLOCK_TIME_IS_VALID (max)) {
1738 GST_ELEMENT_WARNING (self, CORE, CLOCK, (NULL),
1739 ("Impossible to configure latency: max %" GST_TIME_FORMAT " < min %"
1740 GST_TIME_FORMAT ". Add queues or other buffering elements.",
1741 GST_TIME_ARGS (max), GST_TIME_ARGS (min)));
1745 self->priv->peer_latency_live = live;
1746 self->priv->peer_latency_min = min;
1747 self->priv->peer_latency_max = max;
1748 self->priv->has_peer_latency = TRUE;
1752 min += self->priv->sub_latency_min;
1753 if (GST_CLOCK_TIME_IS_VALID (self->priv->sub_latency_max)
1754 && GST_CLOCK_TIME_IS_VALID (max))
1755 max += self->priv->sub_latency_max + our_latency;
1757 max = GST_CLOCK_TIME_NONE;
1759 SRC_BROADCAST (self);
1761 GST_DEBUG_OBJECT (self, "configured latency live:%s min:%" G_GINT64_FORMAT
1762 " max:%" G_GINT64_FORMAT, live ? "true" : "false", min, max);
1764 gst_query_set_latency (query, live, min, max);
1770 * MUST be called with the src_lock held.
1772 * See gst_aggregator_get_latency() for doc
1775 gst_aggregator_get_latency_unlocked (GstAggregator * self)
1777 GstClockTime latency;
1779 g_return_val_if_fail (GST_IS_AGGREGATOR (self), 0);
1781 if (!self->priv->has_peer_latency) {
1782 GstQuery *query = gst_query_new_latency ();
1785 ret = gst_aggregator_query_latency_unlocked (self, query);
1786 gst_query_unref (query);
1788 return GST_CLOCK_TIME_NONE;
1791 if (!self->priv->has_peer_latency || !self->priv->peer_latency_live)
1792 return GST_CLOCK_TIME_NONE;
1794 /* latency_min is never GST_CLOCK_TIME_NONE by construction */
1795 latency = self->priv->peer_latency_min;
1798 latency += self->priv->latency;
1799 latency += self->priv->sub_latency_min;
1805 * gst_aggregator_get_latency:
1806 * @self: a #GstAggregator
1808 * Retrieves the latency values reported by @self in response to the latency
1809 * query, or %GST_CLOCK_TIME_NONE if there is not live source connected and the element
1810 * will not wait for the clock.
1812 * Typically only called by subclasses.
1814 * Returns: The latency or %GST_CLOCK_TIME_NONE if the element does not sync
1817 gst_aggregator_get_latency (GstAggregator * self)
1822 ret = gst_aggregator_get_latency_unlocked (self);
1829 gst_aggregator_send_event (GstElement * element, GstEvent * event)
1831 GstAggregator *self = GST_AGGREGATOR (element);
1833 GST_STATE_LOCK (element);
1834 if (GST_EVENT_TYPE (event) == GST_EVENT_SEEK &&
1835 GST_STATE (element) < GST_STATE_PAUSED) {
1839 GstSeekType start_type, stop_type;
1842 gst_event_parse_seek (event, &rate, &fmt, &flags, &start_type,
1843 &start, &stop_type, &stop);
1845 GST_OBJECT_LOCK (self);
1846 gst_segment_do_seek (&self->segment, rate, fmt, flags, start_type, start,
1847 stop_type, stop, NULL);
1848 self->priv->seqnum = gst_event_get_seqnum (event);
1849 self->priv->first_buffer = FALSE;
1850 GST_OBJECT_UNLOCK (self);
1852 GST_DEBUG_OBJECT (element, "Storing segment %" GST_PTR_FORMAT, event);
1854 GST_STATE_UNLOCK (element);
1857 return GST_ELEMENT_CLASS (aggregator_parent_class)->send_event (element,
1862 gst_aggregator_default_src_query (GstAggregator * self, GstQuery * query)
1864 gboolean res = TRUE;
1866 switch (GST_QUERY_TYPE (query)) {
1867 case GST_QUERY_SEEKING:
1871 /* don't pass it along as some (file)sink might claim it does
1872 * whereas with a collectpads in between that will not likely work */
1873 gst_query_parse_seeking (query, &format, NULL, NULL, NULL);
1874 gst_query_set_seeking (query, format, FALSE, 0, -1);
1879 case GST_QUERY_LATENCY:
1881 res = gst_aggregator_query_latency_unlocked (self, query);
1885 return gst_pad_query_default (self->srcpad, GST_OBJECT (self), query);
1892 gst_aggregator_event_forward_func (GstPad * pad, gpointer user_data)
1894 EventData *evdata = user_data;
1895 gboolean ret = TRUE;
1896 GstPad *peer = gst_pad_get_peer (pad);
1897 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
1900 if (evdata->only_to_active_pads && aggpad->priv->first_buffer) {
1901 GST_DEBUG_OBJECT (pad, "not sending event to inactive pad");
1904 ret = gst_pad_send_event (peer, gst_event_ref (evdata->event));
1905 GST_DEBUG_OBJECT (pad, "return of event push is %d", ret);
1906 gst_object_unref (peer);
1911 if (GST_EVENT_TYPE (evdata->event) == GST_EVENT_SEEK) {
1912 GstQuery *seeking = gst_query_new_seeking (GST_FORMAT_TIME);
1914 GST_DEBUG_OBJECT (pad, "Event %" GST_PTR_FORMAT " failed", evdata->event);
1916 if (gst_pad_query (peer, seeking)) {
1919 gst_query_parse_seeking (seeking, NULL, &seekable, NULL, NULL);
1921 if (seekable == FALSE) {
1922 GST_INFO_OBJECT (pad,
1923 "Source not seekable, We failed but it does not matter!");
1928 GST_ERROR_OBJECT (pad, "Query seeking FAILED");
1931 gst_query_unref (seeking);
1934 if (evdata->flush) {
1936 aggpad->priv->pending_flush_start = FALSE;
1937 aggpad->priv->pending_flush_stop = FALSE;
1938 PAD_UNLOCK (aggpad);
1941 evdata->one_actually_seeked = TRUE;
1944 evdata->result &= ret;
1946 /* Always send to all pads */
1951 gst_aggregator_forward_event_to_all_sinkpads (GstAggregator * self,
1954 evdata->result = TRUE;
1955 evdata->one_actually_seeked = FALSE;
1957 /* We first need to set all pads as flushing in a first pass
1958 * as flush_start flush_stop is sometimes sent synchronously
1959 * while we send the seek event */
1960 if (evdata->flush) {
1963 GST_OBJECT_LOCK (self);
1964 for (l = GST_ELEMENT_CAST (self)->sinkpads; l != NULL; l = l->next) {
1965 GstAggregatorPad *pad = l->data;
1968 pad->priv->pending_flush_start = TRUE;
1969 pad->priv->pending_flush_stop = FALSE;
1972 GST_OBJECT_UNLOCK (self);
1975 gst_pad_forward (self->srcpad, gst_aggregator_event_forward_func, evdata);
1977 gst_event_unref (evdata->event);
1981 gst_aggregator_do_seek (GstAggregator * self, GstEvent * event)
1986 GstSeekType start_type, stop_type;
1989 EventData evdata = { 0, };
1990 GstAggregatorPrivate *priv = self->priv;
1992 gst_event_parse_seek (event, &rate, &fmt, &flags, &start_type,
1993 &start, &stop_type, &stop);
1995 GST_INFO_OBJECT (self, "starting SEEK");
1997 flush = flags & GST_SEEK_FLAG_FLUSH;
1999 GST_OBJECT_LOCK (self);
2001 priv->pending_flush_start = TRUE;
2002 priv->flush_seeking = TRUE;
2005 gst_segment_do_seek (&self->segment, rate, fmt, flags, start_type, start,
2006 stop_type, stop, NULL);
2008 /* Seeking sets a position */
2009 self->priv->first_buffer = FALSE;
2010 GST_OBJECT_UNLOCK (self);
2012 /* forward the seek upstream */
2013 evdata.event = event;
2014 evdata.flush = flush;
2015 evdata.only_to_active_pads = FALSE;
2016 gst_aggregator_forward_event_to_all_sinkpads (self, &evdata);
2019 if (!evdata.result || !evdata.one_actually_seeked) {
2020 GST_OBJECT_LOCK (self);
2021 priv->flush_seeking = FALSE;
2022 priv->pending_flush_start = FALSE;
2023 GST_OBJECT_UNLOCK (self);
2026 GST_INFO_OBJECT (self, "seek done, result: %d", evdata.result);
2028 return evdata.result;
2032 gst_aggregator_default_src_event (GstAggregator * self, GstEvent * event)
2034 EventData evdata = { 0, };
2036 switch (GST_EVENT_TYPE (event)) {
2037 case GST_EVENT_SEEK:
2038 /* _do_seek() unrefs the event. */
2039 return gst_aggregator_do_seek (self, event);
2040 case GST_EVENT_NAVIGATION:
2041 /* navigation is rather pointless. */
2042 gst_event_unref (event);
2048 /* Don't forward QOS events to pads that had no active buffer yet. Otherwise
2049 * they will receive a QOS event that has earliest_time=0 (because we can't
2050 * have negative timestamps), and consider their buffer as too late */
2051 evdata.event = event;
2052 evdata.flush = FALSE;
2053 evdata.only_to_active_pads = GST_EVENT_TYPE (event) == GST_EVENT_QOS;
2054 gst_aggregator_forward_event_to_all_sinkpads (self, &evdata);
2055 return evdata.result;
2059 gst_aggregator_src_pad_event_func (GstPad * pad, GstObject * parent,
2062 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2064 return klass->src_event (GST_AGGREGATOR (parent), event);
2068 gst_aggregator_src_pad_query_func (GstPad * pad, GstObject * parent,
2071 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2073 return klass->src_query (GST_AGGREGATOR (parent), query);
2077 gst_aggregator_src_pad_activate_mode_func (GstPad * pad,
2078 GstObject * parent, GstPadMode mode, gboolean active)
2080 GstAggregator *self = GST_AGGREGATOR (parent);
2081 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2083 if (klass->src_activate) {
2084 if (klass->src_activate (self, mode, active) == FALSE) {
2089 if (active == TRUE) {
2091 case GST_PAD_MODE_PUSH:
2093 GST_INFO_OBJECT (pad, "Activating pad!");
2094 gst_aggregator_start_srcpad_task (self);
2099 GST_ERROR_OBJECT (pad, "Only supported mode is PUSH");
2106 GST_INFO_OBJECT (self, "Deactivating srcpad");
2107 gst_aggregator_stop_srcpad_task (self, FALSE);
2113 gst_aggregator_default_sink_query (GstAggregator * self,
2114 GstAggregatorPad * aggpad, GstQuery * query)
2116 GstPad *pad = GST_PAD (aggpad);
2118 if (GST_QUERY_TYPE (query) == GST_QUERY_ALLOCATION) {
2119 GstQuery *decide_query = NULL;
2120 GstAggregatorClass *agg_class;
2123 GST_OBJECT_LOCK (self);
2125 if (G_UNLIKELY (!aggpad->priv->negotiated)) {
2126 GST_DEBUG_OBJECT (self,
2127 "not negotiated yet, can't answer ALLOCATION query");
2128 PAD_UNLOCK (aggpad);
2129 GST_OBJECT_UNLOCK (self);
2134 if ((decide_query = self->priv->allocation_query))
2135 gst_query_ref (decide_query);
2136 PAD_UNLOCK (aggpad);
2137 GST_OBJECT_UNLOCK (self);
2139 GST_DEBUG_OBJECT (self,
2140 "calling propose allocation with query %" GST_PTR_FORMAT, decide_query);
2142 agg_class = GST_AGGREGATOR_GET_CLASS (self);
2144 /* pass the query to the propose_allocation vmethod if any */
2145 if (agg_class->propose_allocation)
2146 ret = agg_class->propose_allocation (self, aggpad, decide_query, query);
2151 gst_query_unref (decide_query);
2153 GST_DEBUG_OBJECT (self, "ALLOCATION ret %d, %" GST_PTR_FORMAT, ret, query);
2157 return gst_pad_query_default (pad, GST_OBJECT (self), query);
2161 gst_aggregator_finalize (GObject * object)
2163 GstAggregator *self = (GstAggregator *) object;
2165 g_mutex_clear (&self->priv->src_lock);
2166 g_cond_clear (&self->priv->src_cond);
2168 G_OBJECT_CLASS (aggregator_parent_class)->finalize (object);
2172 * gst_aggregator_set_latency_property:
2173 * @agg: a #GstAggregator
2174 * @latency: the new latency value (in nanoseconds).
2176 * Sets the new latency value to @latency. This value is used to limit the
2177 * amount of time a pad waits for data to appear before considering the pad
2181 gst_aggregator_set_latency_property (GstAggregator * self, gint64 latency)
2185 g_return_if_fail (GST_IS_AGGREGATOR (self));
2186 g_return_if_fail (GST_CLOCK_TIME_IS_VALID (latency));
2189 changed = (self->priv->latency != latency);
2194 GST_OBJECT_LOCK (self);
2195 /* First lock all the pads */
2196 for (item = GST_ELEMENT_CAST (self)->sinkpads; item; item = item->next) {
2197 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (item->data);
2201 self->priv->latency = latency;
2203 SRC_BROADCAST (self);
2205 /* Now wake up the pads */
2206 for (item = GST_ELEMENT_CAST (self)->sinkpads; item; item = item->next) {
2207 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (item->data);
2208 PAD_BROADCAST_EVENT (aggpad);
2209 PAD_UNLOCK (aggpad);
2211 GST_OBJECT_UNLOCK (self);
2217 gst_element_post_message (GST_ELEMENT_CAST (self),
2218 gst_message_new_latency (GST_OBJECT_CAST (self)));
2222 * gst_aggregator_get_latency_property:
2223 * @agg: a #GstAggregator
2225 * Gets the latency value. See gst_aggregator_set_latency for
2228 * Returns: The time in nanoseconds to wait for data to arrive on a sink pad
2229 * before a pad is deemed unresponsive. A value of -1 means an
2233 gst_aggregator_get_latency_property (GstAggregator * agg)
2237 g_return_val_if_fail (GST_IS_AGGREGATOR (agg), -1);
2239 GST_OBJECT_LOCK (agg);
2240 res = agg->priv->latency;
2241 GST_OBJECT_UNLOCK (agg);
2247 gst_aggregator_set_property (GObject * object, guint prop_id,
2248 const GValue * value, GParamSpec * pspec)
2250 GstAggregator *agg = GST_AGGREGATOR (object);
2254 gst_aggregator_set_latency_property (agg, g_value_get_int64 (value));
2256 case PROP_START_TIME_SELECTION:
2257 agg->priv->start_time_selection = g_value_get_enum (value);
2259 case PROP_START_TIME:
2260 agg->priv->start_time = g_value_get_uint64 (value);
2263 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2269 gst_aggregator_get_property (GObject * object, guint prop_id,
2270 GValue * value, GParamSpec * pspec)
2272 GstAggregator *agg = GST_AGGREGATOR (object);
2276 g_value_set_int64 (value, gst_aggregator_get_latency_property (agg));
2278 case PROP_START_TIME_SELECTION:
2279 g_value_set_enum (value, agg->priv->start_time_selection);
2281 case PROP_START_TIME:
2282 g_value_set_uint64 (value, agg->priv->start_time);
2285 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2290 /* GObject vmethods implementations */
2292 gst_aggregator_class_init (GstAggregatorClass * klass)
2294 GObjectClass *gobject_class = (GObjectClass *) klass;
2295 GstElementClass *gstelement_class = (GstElementClass *) klass;
2297 aggregator_parent_class = g_type_class_peek_parent (klass);
2298 g_type_class_add_private (klass, sizeof (GstAggregatorPrivate));
2300 GST_DEBUG_CATEGORY_INIT (aggregator_debug, "aggregator",
2301 GST_DEBUG_FG_MAGENTA, "GstAggregator");
2303 klass->sinkpads_type = GST_TYPE_AGGREGATOR_PAD;
2305 klass->sink_event = gst_aggregator_default_sink_event;
2306 klass->sink_query = gst_aggregator_default_sink_query;
2308 klass->src_event = gst_aggregator_default_src_event;
2309 klass->src_query = gst_aggregator_default_src_query;
2311 klass->create_new_pad = gst_aggregator_default_create_new_pad;
2312 klass->update_src_caps = gst_aggregator_default_update_src_caps;
2313 klass->fixate_src_caps = gst_aggregator_default_fixate_src_caps;
2314 klass->negotiated_src_caps = gst_aggregator_default_negotiated_src_caps;
2316 gstelement_class->request_new_pad =
2317 GST_DEBUG_FUNCPTR (gst_aggregator_request_new_pad);
2318 gstelement_class->send_event = GST_DEBUG_FUNCPTR (gst_aggregator_send_event);
2319 gstelement_class->release_pad =
2320 GST_DEBUG_FUNCPTR (gst_aggregator_release_pad);
2321 gstelement_class->change_state =
2322 GST_DEBUG_FUNCPTR (gst_aggregator_change_state);
2324 gobject_class->set_property = gst_aggregator_set_property;
2325 gobject_class->get_property = gst_aggregator_get_property;
2326 gobject_class->finalize = gst_aggregator_finalize;
2328 g_object_class_install_property (gobject_class, PROP_LATENCY,
2329 g_param_spec_int64 ("latency", "Buffer latency",
2330 "Additional latency in live mode to allow upstream "
2331 "to take longer to produce buffers for the current "
2332 "position (in nanoseconds)", 0,
2333 (G_MAXLONG == G_MAXINT64) ? G_MAXINT64 : (G_MAXLONG * GST_SECOND - 1),
2334 DEFAULT_LATENCY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
2336 g_object_class_install_property (gobject_class, PROP_START_TIME_SELECTION,
2337 g_param_spec_enum ("start-time-selection", "Start Time Selection",
2338 "Decides which start time is output",
2339 gst_aggregator_start_time_selection_get_type (),
2340 DEFAULT_START_TIME_SELECTION,
2341 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
2343 g_object_class_install_property (gobject_class, PROP_START_TIME,
2344 g_param_spec_uint64 ("start-time", "Start Time",
2345 "Start time to use if start-time-selection=set", 0,
2347 DEFAULT_START_TIME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
2349 GST_DEBUG_REGISTER_FUNCPTR (gst_aggregator_stop_pad);
2350 GST_DEBUG_REGISTER_FUNCPTR (gst_aggregator_do_events_and_queries);
2354 gst_aggregator_init (GstAggregator * self, GstAggregatorClass * klass)
2356 GstPadTemplate *pad_template;
2357 GstAggregatorPrivate *priv;
2359 g_return_if_fail (klass->aggregate != NULL);
2362 G_TYPE_INSTANCE_GET_PRIVATE (self, GST_TYPE_AGGREGATOR,
2363 GstAggregatorPrivate);
2368 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass), "src");
2369 g_return_if_fail (pad_template != NULL);
2371 priv->max_padserial = -1;
2372 priv->tags_changed = FALSE;
2374 self->priv->peer_latency_live = FALSE;
2375 self->priv->peer_latency_min = self->priv->sub_latency_min = 0;
2376 self->priv->peer_latency_max = self->priv->sub_latency_max = 0;
2377 self->priv->has_peer_latency = FALSE;
2378 gst_aggregator_reset_flow_values (self);
2380 self->srcpad = gst_pad_new_from_template (pad_template, "src");
2382 gst_pad_set_event_function (self->srcpad,
2383 GST_DEBUG_FUNCPTR (gst_aggregator_src_pad_event_func));
2384 gst_pad_set_query_function (self->srcpad,
2385 GST_DEBUG_FUNCPTR (gst_aggregator_src_pad_query_func));
2386 gst_pad_set_activatemode_function (self->srcpad,
2387 GST_DEBUG_FUNCPTR (gst_aggregator_src_pad_activate_mode_func));
2389 gst_element_add_pad (GST_ELEMENT (self), self->srcpad);
2391 self->priv->latency = DEFAULT_LATENCY;
2392 self->priv->start_time_selection = DEFAULT_START_TIME_SELECTION;
2393 self->priv->start_time = DEFAULT_START_TIME;
2395 g_mutex_init (&self->priv->src_lock);
2396 g_cond_init (&self->priv->src_cond);
2399 /* we can't use G_DEFINE_ABSTRACT_TYPE because we need the klass in the _init
2400 * method to get to the padtemplates */
2402 gst_aggregator_get_type (void)
2404 static volatile gsize type = 0;
2406 if (g_once_init_enter (&type)) {
2408 static const GTypeInfo info = {
2409 sizeof (GstAggregatorClass),
2412 (GClassInitFunc) gst_aggregator_class_init,
2415 sizeof (GstAggregator),
2417 (GInstanceInitFunc) gst_aggregator_init,
2420 _type = g_type_register_static (GST_TYPE_ELEMENT,
2421 "GstAggregator", &info, G_TYPE_FLAG_ABSTRACT);
2422 g_once_init_leave (&type, _type);
2427 /* Must be called with SRC lock and PAD lock held */
2429 gst_aggregator_pad_has_space (GstAggregator * self, GstAggregatorPad * aggpad)
2431 /* Empty queue always has space */
2432 if (aggpad->priv->num_buffers == 0 && aggpad->priv->clipped_buffer == NULL)
2435 /* We also want at least two buffers, one is being processed and one is ready
2436 * for the next iteration when we operate in live mode. */
2437 if (self->priv->peer_latency_live && aggpad->priv->num_buffers < 2)
2440 /* zero latency, if there is a buffer, it's full */
2441 if (self->priv->latency == 0)
2444 /* Allow no more buffers than the latency */
2445 return (aggpad->priv->time_level <= self->priv->latency);
2448 /* Must be called with the PAD_LOCK held */
2450 apply_buffer (GstAggregatorPad * aggpad, GstBuffer * buffer, gboolean head)
2452 GstClockTime timestamp;
2454 if (GST_BUFFER_DTS_IS_VALID (buffer))
2455 timestamp = GST_BUFFER_DTS (buffer);
2457 timestamp = GST_BUFFER_PTS (buffer);
2459 if (timestamp == GST_CLOCK_TIME_NONE) {
2461 timestamp = aggpad->priv->head_position;
2463 timestamp = aggpad->priv->tail_position;
2467 if (GST_BUFFER_DURATION_IS_VALID (buffer))
2468 timestamp += GST_BUFFER_DURATION (buffer);
2471 aggpad->priv->head_position = timestamp;
2473 aggpad->priv->tail_position = timestamp;
2475 update_time_level (aggpad, head);
2478 static GstFlowReturn
2479 gst_aggregator_pad_chain_internal (GstAggregator * self,
2480 GstAggregatorPad * aggpad, GstBuffer * buffer, gboolean head)
2482 GstFlowReturn flow_return;
2483 GstClockTime buf_pts;
2485 GST_DEBUG_OBJECT (aggpad, "Start chaining a buffer %" GST_PTR_FORMAT, buffer);
2487 PAD_FLUSH_LOCK (aggpad);
2490 flow_return = aggpad->priv->flow_return;
2491 if (flow_return != GST_FLOW_OK)
2494 if (aggpad->priv->pending_eos == TRUE)
2497 PAD_UNLOCK (aggpad);
2499 buf_pts = GST_BUFFER_PTS (buffer);
2503 GST_OBJECT_LOCK (self);
2506 if (aggpad->priv->first_buffer) {
2507 self->priv->has_peer_latency = FALSE;
2508 aggpad->priv->first_buffer = FALSE;
2511 if (gst_aggregator_pad_has_space (self, aggpad)
2512 && aggpad->priv->flow_return == GST_FLOW_OK) {
2514 g_queue_push_head (&aggpad->priv->data, buffer);
2516 g_queue_push_tail (&aggpad->priv->data, buffer);
2517 apply_buffer (aggpad, buffer, head);
2518 aggpad->priv->num_buffers++;
2520 SRC_BROADCAST (self);
2524 flow_return = aggpad->priv->flow_return;
2525 if (flow_return != GST_FLOW_OK) {
2526 GST_OBJECT_UNLOCK (self);
2530 GST_DEBUG_OBJECT (aggpad, "Waiting for buffer to be consumed");
2531 GST_OBJECT_UNLOCK (self);
2533 PAD_WAIT_EVENT (aggpad);
2535 PAD_UNLOCK (aggpad);
2538 if (self->priv->first_buffer) {
2539 GstClockTime start_time;
2541 switch (self->priv->start_time_selection) {
2542 case GST_AGGREGATOR_START_TIME_SELECTION_ZERO:
2546 case GST_AGGREGATOR_START_TIME_SELECTION_FIRST:
2547 GST_OBJECT_LOCK (aggpad);
2548 if (aggpad->priv->head_segment.format == GST_FORMAT_TIME) {
2549 start_time = buf_pts;
2550 if (start_time != -1) {
2551 start_time = MAX (start_time, aggpad->priv->head_segment.start);
2553 gst_segment_to_running_time (&aggpad->priv->head_segment,
2554 GST_FORMAT_TIME, start_time);
2558 GST_WARNING_OBJECT (aggpad,
2559 "Ignoring request of selecting the first start time "
2560 "as the segment is a %s segment instead of a time segment",
2561 gst_format_get_name (aggpad->segment.format));
2563 GST_OBJECT_UNLOCK (aggpad);
2565 case GST_AGGREGATOR_START_TIME_SELECTION_SET:
2566 start_time = self->priv->start_time;
2567 if (start_time == -1)
2572 if (start_time != -1) {
2573 if (self->segment.position == -1)
2574 self->segment.position = start_time;
2576 self->segment.position = MIN (start_time, self->segment.position);
2578 GST_DEBUG_OBJECT (self, "Selecting start time %" GST_TIME_FORMAT,
2579 GST_TIME_ARGS (start_time));
2583 PAD_UNLOCK (aggpad);
2584 GST_OBJECT_UNLOCK (self);
2587 PAD_FLUSH_UNLOCK (aggpad);
2589 GST_DEBUG_OBJECT (aggpad, "Done chaining");
2594 PAD_UNLOCK (aggpad);
2595 PAD_FLUSH_UNLOCK (aggpad);
2597 GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping buffer",
2598 gst_flow_get_name (flow_return));
2600 gst_buffer_unref (buffer);
2605 PAD_UNLOCK (aggpad);
2606 PAD_FLUSH_UNLOCK (aggpad);
2608 gst_buffer_unref (buffer);
2609 GST_DEBUG_OBJECT (aggpad, "We are EOS already...");
2611 return GST_FLOW_EOS;
2614 static GstFlowReturn
2615 gst_aggregator_pad_chain (GstPad * pad, GstObject * object, GstBuffer * buffer)
2617 return gst_aggregator_pad_chain_internal (GST_AGGREGATOR_CAST (object),
2618 GST_AGGREGATOR_PAD_CAST (pad), buffer, TRUE);
2622 gst_aggregator_pad_query_func (GstPad * pad, GstObject * parent,
2625 GstAggregator *self = GST_AGGREGATOR (parent);
2626 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
2627 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2629 if (GST_QUERY_IS_SERIALIZED (query)) {
2631 gboolean ret = FALSE;
2636 if (aggpad->priv->flow_return != GST_FLOW_OK) {
2641 g_queue_push_head (&aggpad->priv->data, query);
2642 SRC_BROADCAST (self);
2645 while (!gst_aggregator_pad_queue_is_empty (aggpad)
2646 && aggpad->priv->flow_return == GST_FLOW_OK) {
2647 GST_DEBUG_OBJECT (aggpad, "Waiting for buffer to be consumed");
2648 PAD_WAIT_EVENT (aggpad);
2651 s = gst_query_writable_structure (query);
2652 if (gst_structure_get_boolean (s, "gst-aggregator-retval", &ret))
2653 gst_structure_remove_field (s, "gst-aggregator-retval");
2655 g_queue_remove (&aggpad->priv->data, query);
2657 if (aggpad->priv->flow_return != GST_FLOW_OK)
2660 PAD_UNLOCK (aggpad);
2665 return klass->sink_query (self, aggpad, query);
2668 GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping query",
2669 gst_flow_get_name (aggpad->priv->flow_return));
2670 PAD_UNLOCK (aggpad);
2675 static GstFlowReturn
2676 gst_aggregator_pad_event_func (GstPad * pad, GstObject * parent,
2679 GstFlowReturn ret = GST_FLOW_OK;
2680 GstAggregator *self = GST_AGGREGATOR (parent);
2681 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
2682 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2684 if (GST_EVENT_IS_SERIALIZED (event) && GST_EVENT_TYPE (event) != GST_EVENT_EOS
2685 /* && GST_EVENT_TYPE (event) != GST_EVENT_SEGMENT_DONE */ ) {
2689 if (aggpad->priv->flow_return != GST_FLOW_OK
2690 && GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP) {
2691 ret = aggpad->priv->flow_return;
2695 if (GST_EVENT_TYPE (event) == GST_EVENT_SEGMENT) {
2696 GST_OBJECT_LOCK (aggpad);
2697 gst_event_copy_segment (event, &aggpad->priv->head_segment);
2698 aggpad->priv->head_position = aggpad->priv->head_segment.position;
2699 update_time_level (aggpad, TRUE);
2700 GST_OBJECT_UNLOCK (aggpad);
2703 if (GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP) {
2704 GST_DEBUG_OBJECT (aggpad, "Store event in queue: %" GST_PTR_FORMAT,
2706 g_queue_push_head (&aggpad->priv->data, event);
2708 SRC_BROADCAST (self);
2710 PAD_UNLOCK (aggpad);
2715 if (!klass->sink_event (self, aggpad, event)) {
2716 /* Copied from GstPad to convert boolean to a GstFlowReturn in
2717 * the event handling func */
2718 ret = GST_FLOW_ERROR;
2725 GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping event",
2726 gst_flow_get_name (aggpad->priv->flow_return));
2727 PAD_UNLOCK (aggpad);
2729 if (GST_EVENT_IS_STICKY (event))
2730 gst_pad_store_sticky_event (pad, event);
2731 gst_event_unref (event);
2737 gst_aggregator_pad_activate_mode_func (GstPad * pad,
2738 GstObject * parent, GstPadMode mode, gboolean active)
2740 GstAggregator *self = GST_AGGREGATOR (parent);
2741 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
2743 if (active == FALSE) {
2745 gst_aggregator_pad_set_flushing (aggpad, GST_FLOW_FLUSHING, TRUE);
2746 SRC_BROADCAST (self);
2750 aggpad->priv->flow_return = GST_FLOW_OK;
2751 PAD_BROADCAST_EVENT (aggpad);
2752 PAD_UNLOCK (aggpad);
2758 /***********************************
2759 * GstAggregatorPad implementation *
2760 ************************************/
2761 G_DEFINE_TYPE (GstAggregatorPad, gst_aggregator_pad, GST_TYPE_PAD);
2764 gst_aggregator_pad_constructed (GObject * object)
2766 GstPad *pad = GST_PAD (object);
2768 gst_pad_set_chain_function (pad,
2769 GST_DEBUG_FUNCPTR (gst_aggregator_pad_chain));
2770 gst_pad_set_event_full_function_full (pad,
2771 GST_DEBUG_FUNCPTR (gst_aggregator_pad_event_func), NULL, NULL);
2772 gst_pad_set_query_function (pad,
2773 GST_DEBUG_FUNCPTR (gst_aggregator_pad_query_func));
2774 gst_pad_set_activatemode_function (pad,
2775 GST_DEBUG_FUNCPTR (gst_aggregator_pad_activate_mode_func));
2779 gst_aggregator_pad_finalize (GObject * object)
2781 GstAggregatorPad *pad = (GstAggregatorPad *) object;
2783 g_cond_clear (&pad->priv->event_cond);
2784 g_mutex_clear (&pad->priv->flush_lock);
2785 g_mutex_clear (&pad->priv->lock);
2787 G_OBJECT_CLASS (gst_aggregator_pad_parent_class)->finalize (object);
2791 gst_aggregator_pad_dispose (GObject * object)
2793 GstAggregatorPad *pad = (GstAggregatorPad *) object;
2795 gst_aggregator_pad_set_flushing (pad, GST_FLOW_FLUSHING, TRUE);
2797 G_OBJECT_CLASS (gst_aggregator_pad_parent_class)->dispose (object);
2801 gst_aggregator_pad_class_init (GstAggregatorPadClass * klass)
2803 GObjectClass *gobject_class = (GObjectClass *) klass;
2805 g_type_class_add_private (klass, sizeof (GstAggregatorPadPrivate));
2807 gobject_class->constructed = gst_aggregator_pad_constructed;
2808 gobject_class->finalize = gst_aggregator_pad_finalize;
2809 gobject_class->dispose = gst_aggregator_pad_dispose;
2813 gst_aggregator_pad_init (GstAggregatorPad * pad)
2816 G_TYPE_INSTANCE_GET_PRIVATE (pad, GST_TYPE_AGGREGATOR_PAD,
2817 GstAggregatorPadPrivate);
2819 g_queue_init (&pad->priv->data);
2820 g_cond_init (&pad->priv->event_cond);
2822 g_mutex_init (&pad->priv->flush_lock);
2823 g_mutex_init (&pad->priv->lock);
2825 gst_aggregator_pad_reset_unlocked (pad);
2826 pad->priv->negotiated = FALSE;
2829 /* Must be called with the PAD_LOCK held */
2831 gst_aggregator_pad_buffer_consumed (GstAggregatorPad * pad)
2833 pad->priv->num_buffers--;
2834 GST_TRACE_OBJECT (pad, "Consuming buffer");
2835 if (gst_aggregator_pad_queue_is_empty (pad) && pad->priv->pending_eos) {
2836 pad->priv->pending_eos = FALSE;
2837 pad->priv->eos = TRUE;
2839 PAD_BROADCAST_EVENT (pad);
2842 /* Must be called with the PAD_LOCK held */
2844 gst_aggregator_pad_clip_buffer_unlocked (GstAggregatorPad * pad)
2846 GstAggregator *self = NULL;
2847 GstAggregatorClass *aggclass = NULL;
2848 GstBuffer *buffer = NULL;
2850 while (pad->priv->clipped_buffer == NULL &&
2851 GST_IS_BUFFER (g_queue_peek_tail (&pad->priv->data))) {
2852 buffer = g_queue_pop_tail (&pad->priv->data);
2854 apply_buffer (pad, buffer, FALSE);
2856 /* We only take the parent here so that it's not taken if the buffer is
2857 * already clipped or if the queue is empty.
2860 self = GST_AGGREGATOR (gst_pad_get_parent_element (GST_PAD (pad)));
2862 gst_buffer_unref (buffer);
2866 aggclass = GST_AGGREGATOR_GET_CLASS (self);
2869 if (aggclass->clip) {
2870 GST_TRACE_OBJECT (pad, "Clipping: %" GST_PTR_FORMAT, buffer);
2872 buffer = aggclass->clip (self, pad, buffer);
2874 if (buffer == NULL) {
2875 gst_aggregator_pad_buffer_consumed (pad);
2876 GST_TRACE_OBJECT (pad, "Clipping consumed the buffer");
2880 pad->priv->clipped_buffer = buffer;
2884 gst_object_unref (self);
2888 * gst_aggregator_pad_steal_buffer:
2889 * @pad: the pad to get buffer from
2891 * Steal the ref to the buffer currently queued in @pad.
2893 * Returns: (transfer full): The buffer in @pad or NULL if no buffer was
2894 * queued. You should unref the buffer after usage.
2897 gst_aggregator_pad_steal_buffer (GstAggregatorPad * pad)
2903 gst_aggregator_pad_clip_buffer_unlocked (pad);
2905 buffer = pad->priv->clipped_buffer;
2908 pad->priv->clipped_buffer = NULL;
2909 gst_aggregator_pad_buffer_consumed (pad);
2910 GST_DEBUG_OBJECT (pad, "Consumed: %" GST_PTR_FORMAT, buffer);
2919 * gst_aggregator_pad_drop_buffer:
2920 * @pad: the pad where to drop any pending buffer
2922 * Drop the buffer currently queued in @pad.
2924 * Returns: TRUE if there was a buffer queued in @pad, or FALSE if not.
2927 gst_aggregator_pad_drop_buffer (GstAggregatorPad * pad)
2931 buf = gst_aggregator_pad_steal_buffer (pad);
2936 gst_buffer_unref (buf);
2941 * gst_aggregator_pad_get_buffer:
2942 * @pad: the pad to get buffer from
2944 * Returns: (transfer full): A reference to the buffer in @pad or
2945 * NULL if no buffer was queued. You should unref the buffer after
2949 gst_aggregator_pad_get_buffer (GstAggregatorPad * pad)
2955 gst_aggregator_pad_clip_buffer_unlocked (pad);
2957 if (pad->priv->clipped_buffer) {
2958 buffer = gst_buffer_ref (pad->priv->clipped_buffer);
2968 gst_aggregator_pad_is_eos (GstAggregatorPad * pad)
2973 is_eos = pad->priv->eos;
2980 * gst_aggregator_merge_tags:
2981 * @self: a #GstAggregator
2982 * @tags: a #GstTagList to merge
2983 * @mode: the #GstTagMergeMode to use
2985 * Adds tags to so-called pending tags, which will be processed
2986 * before pushing out data downstream.
2988 * Note that this is provided for convenience, and the subclass is
2989 * not required to use this and can still do tag handling on its own.
2994 gst_aggregator_merge_tags (GstAggregator * self,
2995 const GstTagList * tags, GstTagMergeMode mode)
2999 g_return_if_fail (GST_IS_AGGREGATOR (self));
3000 g_return_if_fail (tags == NULL || GST_IS_TAG_LIST (tags));
3002 /* FIXME Check if we can use OBJECT lock here! */
3003 GST_OBJECT_LOCK (self);
3005 GST_DEBUG_OBJECT (self, "merging tags %" GST_PTR_FORMAT, tags);
3006 otags = self->priv->tags;
3007 self->priv->tags = gst_tag_list_merge (self->priv->tags, tags, mode);
3009 gst_tag_list_unref (otags);
3010 self->priv->tags_changed = TRUE;
3011 GST_OBJECT_UNLOCK (self);
3015 * gst_aggregator_set_latency:
3016 * @self: a #GstAggregator
3017 * @min_latency: minimum latency
3018 * @max_latency: maximum latency
3020 * Lets #GstAggregator sub-classes tell the baseclass what their internal
3021 * latency is. Will also post a LATENCY message on the bus so the pipeline
3022 * can reconfigure its global latency.
3025 gst_aggregator_set_latency (GstAggregator * self,
3026 GstClockTime min_latency, GstClockTime max_latency)
3028 gboolean changed = FALSE;
3030 g_return_if_fail (GST_IS_AGGREGATOR (self));
3031 g_return_if_fail (GST_CLOCK_TIME_IS_VALID (min_latency));
3032 g_return_if_fail (max_latency >= min_latency);
3035 if (self->priv->sub_latency_min != min_latency) {
3036 self->priv->sub_latency_min = min_latency;
3039 if (self->priv->sub_latency_max != max_latency) {
3040 self->priv->sub_latency_max = max_latency;
3045 SRC_BROADCAST (self);
3049 gst_element_post_message (GST_ELEMENT_CAST (self),
3050 gst_message_new_latency (GST_OBJECT_CAST (self)));
3055 * gst_aggregator_get_buffer_pool:
3056 * @self: a #GstAggregator
3058 * Returns: (transfer full): the instance of the #GstBufferPool used
3059 * by @trans; free it after use it
3062 gst_aggregator_get_buffer_pool (GstAggregator * self)
3064 GstBufferPool *pool;
3066 g_return_val_if_fail (GST_IS_AGGREGATOR (self), NULL);
3068 GST_OBJECT_LOCK (self);
3069 pool = self->priv->pool;
3071 gst_object_ref (pool);
3072 GST_OBJECT_UNLOCK (self);
3078 * gst_aggregator_get_allocator:
3079 * @self: a #GstAggregator
3080 * @allocator: (out) (allow-none) (transfer full): the #GstAllocator
3082 * @params: (out) (allow-none) (transfer full): the
3083 * #GstAllocationParams of @allocator
3085 * Lets #GstAggregator sub-classes get the memory @allocator
3086 * acquired by the base class and its @params.
3088 * Unref the @allocator after use it.
3091 gst_aggregator_get_allocator (GstAggregator * self,
3092 GstAllocator ** allocator, GstAllocationParams * params)
3094 g_return_if_fail (GST_IS_AGGREGATOR (self));
3097 *allocator = self->priv->allocator ?
3098 gst_object_ref (self->priv->allocator) : NULL;
3101 *params = self->priv->allocation_params;