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
360 * Returns: %FALSE if there are no sinkpads or if @func returned %FALSE
363 gst_aggregator_iterate_sinkpads (GstAggregator * self,
364 GstAggregatorPadForeachFunc func, gpointer user_data)
366 gboolean result = FALSE;
368 gboolean done = FALSE;
369 GValue item = { 0, };
370 GList *seen_pads = NULL;
372 iter = gst_element_iterate_sink_pads (GST_ELEMENT (self));
378 switch (gst_iterator_next (iter, &item)) {
379 case GST_ITERATOR_OK:
381 GstAggregatorPad *pad;
383 pad = g_value_get_object (&item);
385 /* if already pushed, skip. FIXME, find something faster to tag pads */
386 if (pad == NULL || g_list_find (seen_pads, pad)) {
387 g_value_reset (&item);
391 GST_LOG_OBJECT (pad, "calling function %s on pad",
392 GST_DEBUG_FUNCPTR_NAME (func));
394 result = func (self, pad, user_data);
398 seen_pads = g_list_prepend (seen_pads, pad);
400 g_value_reset (&item);
403 case GST_ITERATOR_RESYNC:
404 gst_iterator_resync (iter);
406 case GST_ITERATOR_ERROR:
407 GST_ERROR_OBJECT (self,
408 "Could not iterate over internally linked pads");
411 case GST_ITERATOR_DONE:
416 g_value_unset (&item);
417 gst_iterator_free (iter);
419 if (seen_pads == NULL) {
420 GST_DEBUG_OBJECT (self, "No pad seen");
424 g_list_free (seen_pads);
431 gst_aggregator_pad_queue_is_empty (GstAggregatorPad * pad)
433 return (g_queue_peek_tail (&pad->priv->buffers) == NULL &&
434 pad->priv->clipped_buffer == NULL);
438 gst_aggregator_check_pads_ready (GstAggregator * self)
440 GstAggregatorPad *pad;
442 gboolean have_buffer = TRUE;
443 gboolean have_event = FALSE;
445 GST_LOG_OBJECT (self, "checking pads");
447 GST_OBJECT_LOCK (self);
449 sinkpads = GST_ELEMENT_CAST (self)->sinkpads;
450 if (sinkpads == NULL)
453 for (l = sinkpads; l != NULL; l = l->next) {
458 if (pad->priv->num_buffers == 0) {
459 if (!gst_aggregator_pad_queue_is_empty (pad))
461 if (!pad->priv->eos) {
464 /* If not live we need data on all pads, so leave the loop */
465 if (!self->priv->peer_latency_live) {
470 } else if (self->priv->peer_latency_live) {
471 /* In live mode, having a single pad with buffers is enough to
472 * generate a start time from it. In non-live mode all pads need
475 self->priv->first_buffer = FALSE;
481 if (!have_buffer && !have_event)
485 self->priv->first_buffer = FALSE;
487 GST_OBJECT_UNLOCK (self);
488 GST_LOG_OBJECT (self, "pads are ready");
493 GST_LOG_OBJECT (self, "pads not ready: no sink pads");
494 GST_OBJECT_UNLOCK (self);
500 GST_LOG_OBJECT (pad, "pad not ready to be aggregated yet,"
501 " but waking up for serialized event");
503 GST_LOG_OBJECT (pad, "pad not ready to be aggregated yet");
504 GST_OBJECT_UNLOCK (self);
510 gst_aggregator_reset_flow_values (GstAggregator * self)
512 GST_OBJECT_LOCK (self);
513 self->priv->send_stream_start = TRUE;
514 self->priv->send_segment = TRUE;
515 gst_segment_init (&self->segment, GST_FORMAT_TIME);
516 self->priv->first_buffer = TRUE;
517 GST_OBJECT_UNLOCK (self);
521 gst_aggregator_push_mandatory_events (GstAggregator * self)
523 GstAggregatorPrivate *priv = self->priv;
524 GstEvent *segment = NULL;
525 GstEvent *tags = NULL;
527 if (self->priv->send_stream_start) {
530 GST_INFO_OBJECT (self, "pushing stream start");
531 /* stream-start (FIXME: create id based on input ids) */
532 g_snprintf (s_id, sizeof (s_id), "agg-%08x", g_random_int ());
533 if (!gst_pad_push_event (self->srcpad, gst_event_new_stream_start (s_id))) {
534 GST_WARNING_OBJECT (self->srcpad, "Sending stream start event failed");
536 self->priv->send_stream_start = FALSE;
539 if (self->priv->srccaps) {
541 GST_INFO_OBJECT (self, "pushing caps: %" GST_PTR_FORMAT,
542 self->priv->srccaps);
543 if (!gst_pad_push_event (self->srcpad,
544 gst_event_new_caps (self->priv->srccaps))) {
545 GST_WARNING_OBJECT (self->srcpad, "Sending caps event failed");
547 gst_caps_unref (self->priv->srccaps);
548 self->priv->srccaps = NULL;
551 GST_OBJECT_LOCK (self);
552 if (self->priv->send_segment && !self->priv->flush_seeking) {
553 segment = gst_event_new_segment (&self->segment);
555 if (!self->priv->seqnum)
556 self->priv->seqnum = gst_event_get_seqnum (segment);
558 gst_event_set_seqnum (segment, self->priv->seqnum);
559 self->priv->send_segment = FALSE;
561 GST_DEBUG_OBJECT (self, "pushing segment %" GST_PTR_FORMAT, segment);
564 if (priv->tags && priv->tags_changed && !self->priv->flush_seeking) {
565 tags = gst_event_new_tag (gst_tag_list_ref (priv->tags));
566 priv->tags_changed = FALSE;
568 GST_OBJECT_UNLOCK (self);
571 gst_pad_push_event (self->srcpad, segment);
573 gst_pad_push_event (self->srcpad, tags);
578 * gst_aggregator_set_src_caps:
579 * @self: The #GstAggregator
580 * @caps: The #GstCaps to set on the src pad.
582 * Sets the caps to be used on the src pad.
585 gst_aggregator_set_src_caps (GstAggregator * self, GstCaps * caps)
587 GST_PAD_STREAM_LOCK (self->srcpad);
588 gst_caps_replace (&self->priv->srccaps, caps);
589 gst_aggregator_push_mandatory_events (self);
590 GST_PAD_STREAM_UNLOCK (self->srcpad);
594 * gst_aggregator_finish_buffer:
595 * @self: The #GstAggregator
596 * @buffer: (transfer full): the #GstBuffer to push.
598 * This method will push the provided output buffer downstream. If needed,
599 * mandatory events such as stream-start, caps, and segment events will be
600 * sent before pushing the buffer.
603 gst_aggregator_finish_buffer (GstAggregator * self, GstBuffer * buffer)
605 gst_aggregator_push_mandatory_events (self);
607 GST_OBJECT_LOCK (self);
608 if (!self->priv->flush_seeking && gst_pad_is_active (self->srcpad)) {
609 GST_TRACE_OBJECT (self, "pushing buffer %" GST_PTR_FORMAT, buffer);
610 GST_OBJECT_UNLOCK (self);
611 return gst_pad_push (self->srcpad, buffer);
613 GST_INFO_OBJECT (self, "Not pushing (active: %i, flushing: %i)",
614 self->priv->flush_seeking, gst_pad_is_active (self->srcpad));
615 GST_OBJECT_UNLOCK (self);
616 gst_buffer_unref (buffer);
622 gst_aggregator_push_eos (GstAggregator * self)
625 gst_aggregator_push_mandatory_events (self);
627 event = gst_event_new_eos ();
629 GST_OBJECT_LOCK (self);
630 self->priv->send_eos = FALSE;
631 gst_event_set_seqnum (event, self->priv->seqnum);
632 GST_OBJECT_UNLOCK (self);
634 gst_pad_push_event (self->srcpad, event);
638 gst_aggregator_get_next_time (GstAggregator * self)
640 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
642 if (klass->get_next_time)
643 return klass->get_next_time (self);
645 return GST_CLOCK_TIME_NONE;
649 gst_aggregator_wait_and_check (GstAggregator * self, gboolean * timeout)
651 GstClockTime latency;
659 latency = gst_aggregator_get_latency_unlocked (self);
661 if (gst_aggregator_check_pads_ready (self)) {
662 GST_DEBUG_OBJECT (self, "all pads have data");
668 /* Before waiting, check if we're actually still running */
669 if (!self->priv->running || !self->priv->send_eos) {
675 start = gst_aggregator_get_next_time (self);
677 /* If we're not live, or if we use the running time
678 * of the first buffer as start time, we wait until
679 * all pads have buffers.
680 * Otherwise (i.e. if we are live!), we wait on the clock
681 * and if a pad does not have a buffer in time we ignore
684 GST_OBJECT_LOCK (self);
685 if (!GST_CLOCK_TIME_IS_VALID (latency) ||
686 !GST_IS_CLOCK (GST_ELEMENT_CLOCK (self)) ||
687 !GST_CLOCK_TIME_IS_VALID (start) ||
688 (self->priv->first_buffer
689 && self->priv->start_time_selection ==
690 GST_AGGREGATOR_START_TIME_SELECTION_FIRST)) {
691 /* We wake up here when something happened, and below
692 * then check if we're ready now. If we return FALSE,
693 * we will be directly called again.
695 GST_OBJECT_UNLOCK (self);
698 GstClockTime base_time, time;
700 GstClockReturn status;
701 GstClockTimeDiff jitter;
703 GST_DEBUG_OBJECT (self, "got subclass start time: %" GST_TIME_FORMAT,
704 GST_TIME_ARGS (start));
706 base_time = GST_ELEMENT_CAST (self)->base_time;
707 clock = gst_object_ref (GST_ELEMENT_CLOCK (self));
708 GST_OBJECT_UNLOCK (self);
710 time = base_time + start;
713 GST_DEBUG_OBJECT (self, "possibly waiting for clock to reach %"
714 GST_TIME_FORMAT " (base %" GST_TIME_FORMAT " start %" GST_TIME_FORMAT
715 " latency %" GST_TIME_FORMAT " current %" GST_TIME_FORMAT ")",
716 GST_TIME_ARGS (time),
717 GST_TIME_ARGS (base_time),
718 GST_TIME_ARGS (start), GST_TIME_ARGS (latency),
719 GST_TIME_ARGS (gst_clock_get_time (clock)));
721 self->priv->aggregate_id = gst_clock_new_single_shot_id (clock, time);
722 gst_object_unref (clock);
726 status = gst_clock_id_wait (self->priv->aggregate_id, &jitter);
729 if (self->priv->aggregate_id) {
730 gst_clock_id_unref (self->priv->aggregate_id);
731 self->priv->aggregate_id = NULL;
734 GST_DEBUG_OBJECT (self,
735 "clock returned %d (jitter: %" GST_STIME_FORMAT ")",
736 status, GST_STIME_ARGS (jitter));
739 if (status == GST_CLOCK_OK || status == GST_CLOCK_EARLY) {
746 res = gst_aggregator_check_pads_ready (self);
753 check_events (GstAggregator * self, GstAggregatorPad * pad, gpointer user_data)
755 GstEvent *event = NULL;
756 GstQuery *query = NULL;
757 GstAggregatorClass *klass = NULL;
758 gboolean *processed_event = user_data;
764 if (pad->priv->num_buffers == 0 && pad->priv->pending_eos) {
765 pad->priv->pending_eos = FALSE;
766 pad->priv->eos = TRUE;
768 if (pad->priv->clipped_buffer == NULL &&
769 !GST_IS_BUFFER (g_queue_peek_tail (&pad->priv->buffers))) {
770 if (GST_IS_EVENT (g_queue_peek_tail (&pad->priv->buffers)))
771 event = gst_event_ref (g_queue_peek_tail (&pad->priv->buffers));
772 if (GST_IS_QUERY (g_queue_peek_tail (&pad->priv->buffers)))
773 query = g_queue_peek_tail (&pad->priv->buffers);
776 if (event || query) {
780 *processed_event = TRUE;
782 klass = GST_AGGREGATOR_GET_CLASS (self);
785 GST_LOG_OBJECT (pad, "Processing %" GST_PTR_FORMAT, event);
786 gst_event_ref (event);
787 ret = klass->sink_event (self, pad, event);
790 if (GST_EVENT_TYPE (event) == GST_EVENT_CAPS)
791 pad->priv->negotiated = ret;
792 if (g_queue_peek_tail (&pad->priv->buffers) == event)
793 gst_event_unref (g_queue_pop_tail (&pad->priv->buffers));
794 gst_event_unref (event);
798 GST_LOG_OBJECT (pad, "Processing %" GST_PTR_FORMAT, query);
799 ret = klass->sink_query (self, pad, query);
802 if (g_queue_peek_tail (&pad->priv->buffers) == query) {
805 s = gst_query_writable_structure (query);
806 gst_structure_set (s, "gst-aggregator-retval", G_TYPE_BOOLEAN, ret,
808 g_queue_pop_tail (&pad->priv->buffers);
812 PAD_BROADCAST_EVENT (pad);
817 *processed_event = TRUE;
819 klass = GST_AGGREGATOR_GET_CLASS (self);
821 } while (event != NULL);
827 gst_aggregator_pad_set_flushing (GstAggregatorPad * aggpad,
828 GstFlowReturn flow_return, gboolean full)
833 if (flow_return == GST_FLOW_NOT_LINKED)
834 aggpad->priv->flow_return = MIN (flow_return, aggpad->priv->flow_return);
836 aggpad->priv->flow_return = flow_return;
838 item = g_queue_peek_head_link (&aggpad->priv->buffers);
840 GList *next = item->next;
842 /* In partial flush, we do like the pad, we get rid of non-sticky events
845 if (full || GST_IS_BUFFER (item->data) ||
846 GST_EVENT_TYPE (item->data) == GST_EVENT_EOS ||
847 GST_EVENT_TYPE (item->data) == GST_EVENT_SEGMENT ||
848 !GST_EVENT_IS_STICKY (item->data)) {
849 if (!GST_IS_QUERY (item->data))
850 gst_mini_object_unref (item->data);
851 g_queue_delete_link (&aggpad->priv->buffers, item);
855 aggpad->priv->num_buffers = 0;
856 gst_buffer_replace (&aggpad->priv->clipped_buffer, NULL);
858 PAD_BROADCAST_EVENT (aggpad);
863 gst_aggregator_default_update_src_caps (GstAggregator * agg, GstCaps * caps,
866 *ret = gst_caps_ref (caps);
872 gst_aggregator_default_fixate_src_caps (GstAggregator * agg, GstCaps * caps)
874 caps = gst_caps_fixate (caps);
880 gst_aggregator_default_negotiated_src_caps (GstAggregator * agg, GstCaps * caps)
886 /* takes ownership of the pool, allocator and query */
888 gst_aggregator_set_allocation (GstAggregator * self,
889 GstBufferPool * pool, GstAllocator * allocator,
890 GstAllocationParams * params, GstQuery * query)
892 GstAllocator *oldalloc;
893 GstBufferPool *oldpool;
896 GST_DEBUG ("storing allocation query");
898 GST_OBJECT_LOCK (self);
899 oldpool = self->priv->pool;
900 self->priv->pool = pool;
902 oldalloc = self->priv->allocator;
903 self->priv->allocator = allocator;
905 oldquery = self->priv->allocation_query;
906 self->priv->allocation_query = query;
909 self->priv->allocation_params = *params;
911 gst_allocation_params_init (&self->priv->allocation_params);
912 GST_OBJECT_UNLOCK (self);
915 GST_DEBUG_OBJECT (self, "deactivating old pool %p", oldpool);
916 gst_buffer_pool_set_active (oldpool, FALSE);
917 gst_object_unref (oldpool);
920 gst_object_unref (oldalloc);
923 gst_query_unref (oldquery);
930 gst_aggregator_decide_allocation (GstAggregator * self, GstQuery * query)
932 GstAggregatorClass *aggclass = GST_AGGREGATOR_GET_CLASS (self);
934 if (aggclass->decide_allocation)
935 if (!aggclass->decide_allocation (self, query))
942 gst_aggregator_do_allocation (GstAggregator * self, GstCaps * caps)
945 gboolean result = TRUE;
946 GstBufferPool *pool = NULL;
947 GstAllocator *allocator;
948 GstAllocationParams params;
950 /* find a pool for the negotiated caps now */
951 GST_DEBUG_OBJECT (self, "doing allocation query");
952 query = gst_query_new_allocation (caps, TRUE);
953 if (!gst_pad_peer_query (self->srcpad, query)) {
954 /* not a problem, just debug a little */
955 GST_DEBUG_OBJECT (self, "peer ALLOCATION query failed");
958 GST_DEBUG_OBJECT (self, "calling decide_allocation");
959 result = gst_aggregator_decide_allocation (self, query);
961 GST_DEBUG_OBJECT (self, "ALLOCATION (%d) params: %" GST_PTR_FORMAT, result,
965 goto no_decide_allocation;
967 /* we got configuration from our peer or the decide_allocation method,
969 if (gst_query_get_n_allocation_params (query) > 0) {
970 gst_query_parse_nth_allocation_param (query, 0, &allocator, ¶ms);
973 gst_allocation_params_init (¶ms);
976 if (gst_query_get_n_allocation_pools (query) > 0)
977 gst_query_parse_nth_allocation_pool (query, 0, &pool, NULL, NULL, NULL);
981 gst_aggregator_set_allocation (self, pool, allocator, ¶ms, query);
986 no_decide_allocation:
988 GST_WARNING_OBJECT (self, "Failed to decide allocation");
989 gst_query_unref (query);
996 /* WITH SRC_LOCK held */
998 gst_aggregator_update_src_caps (GstAggregator * self)
1000 GstAggregatorClass *agg_klass = GST_AGGREGATOR_GET_CLASS (self);
1001 GstCaps *downstream_caps, *template_caps, *caps = NULL;
1002 GstFlowReturn ret = GST_FLOW_OK;
1004 template_caps = gst_pad_get_pad_template_caps (self->srcpad);
1005 downstream_caps = gst_pad_peer_query_caps (self->srcpad, template_caps);
1007 if (gst_caps_is_empty (downstream_caps)) {
1008 GST_INFO_OBJECT (self, "Downstream caps (%"
1009 GST_PTR_FORMAT ") not compatible with pad template caps (%"
1010 GST_PTR_FORMAT ")", downstream_caps, template_caps);
1011 ret = GST_FLOW_NOT_NEGOTIATED;
1015 g_assert (agg_klass->update_src_caps);
1016 GST_DEBUG_OBJECT (self, "updating caps from %" GST_PTR_FORMAT,
1018 ret = agg_klass->update_src_caps (self, downstream_caps, &caps);
1019 if (ret < GST_FLOW_OK) {
1020 GST_WARNING_OBJECT (self, "Subclass failed to update provided caps");
1023 if ((caps == NULL || gst_caps_is_empty (caps)) && ret >= GST_FLOW_OK) {
1024 ret = GST_FLOW_NOT_NEGOTIATED;
1027 GST_DEBUG_OBJECT (self, " to %" GST_PTR_FORMAT, caps);
1029 #ifdef GST_ENABLE_EXTRA_CHECKS
1030 if (!gst_caps_is_subset (caps, template_caps)) {
1031 GstCaps *intersection;
1033 GST_ERROR_OBJECT (self,
1034 "update_src_caps returned caps %" GST_PTR_FORMAT
1035 " which are not a real subset of the template caps %"
1036 GST_PTR_FORMAT, caps, template_caps);
1037 g_warning ("%s: update_src_caps returned caps which are not a real "
1038 "subset of the filter caps", GST_ELEMENT_NAME (self));
1041 gst_caps_intersect_full (template_caps, caps, GST_CAPS_INTERSECT_FIRST);
1042 gst_caps_unref (caps);
1043 caps = intersection;
1047 if (gst_caps_is_any (caps)) {
1051 if (!gst_caps_is_fixed (caps)) {
1052 g_assert (agg_klass->fixate_src_caps);
1054 GST_DEBUG_OBJECT (self, "fixate caps from %" GST_PTR_FORMAT, caps);
1055 if (!(caps = agg_klass->fixate_src_caps (self, caps))) {
1056 GST_WARNING_OBJECT (self, "Subclass failed to fixate provided caps");
1057 ret = GST_FLOW_NOT_NEGOTIATED;
1060 GST_DEBUG_OBJECT (self, " to %" GST_PTR_FORMAT, caps);
1063 if (agg_klass->negotiated_src_caps) {
1064 if (!agg_klass->negotiated_src_caps (self, caps)) {
1065 GST_WARNING_OBJECT (self, "Subclass failed to accept negotiated caps");
1066 ret = GST_FLOW_NOT_NEGOTIATED;
1071 gst_aggregator_set_src_caps (self, caps);
1073 if (!gst_aggregator_do_allocation (self, caps)) {
1074 GST_WARNING_OBJECT (self, "Allocation negotiation failed");
1075 ret = GST_FLOW_NOT_NEGOTIATED;
1079 gst_caps_unref (downstream_caps);
1080 gst_caps_unref (template_caps);
1083 gst_caps_unref (caps);
1089 gst_aggregator_aggregate_func (GstAggregator * self)
1091 GstAggregatorPrivate *priv = self->priv;
1092 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
1093 gboolean timeout = FALSE;
1095 if (self->priv->running == FALSE) {
1096 GST_DEBUG_OBJECT (self, "Not running anymore");
1100 GST_LOG_OBJECT (self, "Checking aggregate");
1101 while (priv->send_eos && priv->running) {
1102 GstFlowReturn flow_return = GST_FLOW_OK;
1103 gboolean processed_event = FALSE;
1105 gst_aggregator_iterate_sinkpads (self, check_events, NULL);
1107 if (!gst_aggregator_wait_and_check (self, &timeout))
1110 gst_aggregator_iterate_sinkpads (self, check_events, &processed_event);
1111 if (processed_event)
1114 if (gst_pad_check_reconfigure (GST_AGGREGATOR_SRC_PAD (self))) {
1115 flow_return = gst_aggregator_update_src_caps (self);
1116 if (flow_return != GST_FLOW_OK)
1117 gst_pad_mark_reconfigure (GST_AGGREGATOR_SRC_PAD (self));
1120 if (timeout || flow_return >= GST_FLOW_OK) {
1121 GST_TRACE_OBJECT (self, "Actually aggregating!");
1122 flow_return = klass->aggregate (self, timeout);
1125 if (flow_return == GST_AGGREGATOR_FLOW_NEED_DATA)
1128 GST_OBJECT_LOCK (self);
1129 if (flow_return == GST_FLOW_FLUSHING && priv->flush_seeking) {
1130 /* We don't want to set the pads to flushing, but we want to
1131 * stop the thread, so just break here */
1132 GST_OBJECT_UNLOCK (self);
1135 GST_OBJECT_UNLOCK (self);
1137 if (flow_return == GST_FLOW_EOS || flow_return == GST_FLOW_ERROR) {
1138 gst_aggregator_push_eos (self);
1141 GST_LOG_OBJECT (self, "flow return is %s", gst_flow_get_name (flow_return));
1143 if (flow_return != GST_FLOW_OK) {
1146 GST_OBJECT_LOCK (self);
1147 for (item = GST_ELEMENT (self)->sinkpads; item; item = item->next) {
1148 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (item->data);
1150 gst_aggregator_pad_set_flushing (aggpad, flow_return, TRUE);
1152 GST_OBJECT_UNLOCK (self);
1157 /* Pause the task here, the only ways to get here are:
1158 * 1) We're stopping, in which case the task is stopped anyway
1159 * 2) We got a flow error above, in which case it might take
1160 * some time to forward the flow return upstream and we
1161 * would otherwise call the task function over and over
1162 * again without doing anything
1164 gst_pad_pause_task (self->srcpad);
1168 gst_aggregator_start (GstAggregator * self)
1170 GstAggregatorClass *klass;
1173 self->priv->send_stream_start = TRUE;
1174 self->priv->send_segment = TRUE;
1175 self->priv->send_eos = TRUE;
1176 self->priv->srccaps = NULL;
1178 gst_aggregator_set_allocation (self, NULL, NULL, NULL, NULL);
1180 klass = GST_AGGREGATOR_GET_CLASS (self);
1183 result = klass->start (self);
1191 _check_pending_flush_stop (GstAggregatorPad * pad)
1196 res = (!pad->priv->pending_flush_stop && !pad->priv->pending_flush_start);
1203 gst_aggregator_stop_srcpad_task (GstAggregator * self, GstEvent * flush_start)
1205 gboolean res = TRUE;
1207 GST_INFO_OBJECT (self, "%s srcpad task",
1208 flush_start ? "Pausing" : "Stopping");
1211 self->priv->running = FALSE;
1212 SRC_BROADCAST (self);
1216 res = gst_pad_push_event (self->srcpad, flush_start);
1219 gst_pad_stop_task (self->srcpad);
1225 gst_aggregator_start_srcpad_task (GstAggregator * self)
1227 GST_INFO_OBJECT (self, "Starting srcpad task");
1229 self->priv->running = TRUE;
1230 gst_pad_start_task (GST_PAD (self->srcpad),
1231 (GstTaskFunction) gst_aggregator_aggregate_func, self, NULL);
1234 static GstFlowReturn
1235 gst_aggregator_flush (GstAggregator * self)
1237 GstFlowReturn ret = GST_FLOW_OK;
1238 GstAggregatorPrivate *priv = self->priv;
1239 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
1241 GST_DEBUG_OBJECT (self, "Flushing everything");
1242 GST_OBJECT_LOCK (self);
1243 priv->send_segment = TRUE;
1244 priv->flush_seeking = FALSE;
1245 priv->tags_changed = FALSE;
1246 GST_OBJECT_UNLOCK (self);
1248 ret = klass->flush (self);
1254 /* Called with GstAggregator's object lock held */
1257 gst_aggregator_all_flush_stop_received_locked (GstAggregator * self)
1260 GstAggregatorPad *tmppad;
1262 for (tmp = GST_ELEMENT (self)->sinkpads; tmp; tmp = tmp->next) {
1263 tmppad = (GstAggregatorPad *) tmp->data;
1265 if (_check_pending_flush_stop (tmppad) == FALSE) {
1266 GST_DEBUG_OBJECT (tmppad, "Is not last %i -- %i",
1267 tmppad->priv->pending_flush_start, tmppad->priv->pending_flush_stop);
1276 gst_aggregator_flush_start (GstAggregator * self, GstAggregatorPad * aggpad,
1279 GstAggregatorPrivate *priv = self->priv;
1280 GstAggregatorPadPrivate *padpriv = aggpad->priv;
1282 gst_aggregator_pad_set_flushing (aggpad, GST_FLOW_FLUSHING, FALSE);
1284 PAD_FLUSH_LOCK (aggpad);
1286 if (padpriv->pending_flush_start) {
1287 GST_DEBUG_OBJECT (aggpad, "Expecting FLUSH_STOP now");
1289 padpriv->pending_flush_start = FALSE;
1290 padpriv->pending_flush_stop = TRUE;
1292 PAD_UNLOCK (aggpad);
1294 GST_OBJECT_LOCK (self);
1295 if (priv->flush_seeking) {
1296 /* If flush_seeking we forward the first FLUSH_START */
1297 if (priv->pending_flush_start) {
1298 priv->pending_flush_start = FALSE;
1299 GST_OBJECT_UNLOCK (self);
1301 GST_INFO_OBJECT (self, "Flushing, pausing srcpad task");
1302 gst_aggregator_stop_srcpad_task (self, event);
1304 GST_INFO_OBJECT (self, "Getting STREAM_LOCK while seeking");
1305 GST_PAD_STREAM_LOCK (self->srcpad);
1306 GST_LOG_OBJECT (self, "GOT STREAM_LOCK");
1309 GST_OBJECT_UNLOCK (self);
1310 gst_event_unref (event);
1313 GST_OBJECT_UNLOCK (self);
1314 gst_event_unref (event);
1316 PAD_FLUSH_UNLOCK (aggpad);
1319 /* Must be called with the the PAD_LOCK held */
1321 update_time_level (GstAggregatorPad * aggpad, gboolean head)
1324 if (GST_CLOCK_TIME_IS_VALID (aggpad->priv->head_position) &&
1325 aggpad->priv->head_segment.format == GST_FORMAT_TIME)
1326 aggpad->priv->head_time =
1327 gst_segment_to_running_time (&aggpad->priv->head_segment,
1328 GST_FORMAT_TIME, aggpad->priv->head_position);
1330 aggpad->priv->head_time = GST_CLOCK_TIME_NONE;
1332 if (!GST_CLOCK_TIME_IS_VALID (aggpad->priv->tail_time))
1333 aggpad->priv->tail_time = aggpad->priv->head_time;
1335 if (GST_CLOCK_TIME_IS_VALID (aggpad->priv->tail_position) &&
1336 aggpad->segment.format == GST_FORMAT_TIME)
1337 aggpad->priv->tail_time =
1338 gst_segment_to_running_time (&aggpad->segment,
1339 GST_FORMAT_TIME, aggpad->priv->tail_position);
1341 aggpad->priv->tail_time = aggpad->priv->head_time;
1344 if (aggpad->priv->head_time == GST_CLOCK_TIME_NONE ||
1345 aggpad->priv->tail_time == GST_CLOCK_TIME_NONE) {
1346 aggpad->priv->time_level = 0;
1350 if (aggpad->priv->tail_time > aggpad->priv->head_time)
1351 aggpad->priv->time_level = 0;
1353 aggpad->priv->time_level = aggpad->priv->head_time -
1354 aggpad->priv->tail_time;
1358 /* GstAggregator vmethods default implementations */
1360 gst_aggregator_default_sink_event (GstAggregator * self,
1361 GstAggregatorPad * aggpad, GstEvent * event)
1363 gboolean res = TRUE;
1364 GstPad *pad = GST_PAD (aggpad);
1365 GstAggregatorPrivate *priv = self->priv;
1367 switch (GST_EVENT_TYPE (event)) {
1368 case GST_EVENT_FLUSH_START:
1370 gst_aggregator_flush_start (self, aggpad, event);
1371 /* We forward only in one case: right after flush_seeking */
1375 case GST_EVENT_FLUSH_STOP:
1377 GST_DEBUG_OBJECT (aggpad, "Got FLUSH_STOP");
1379 gst_aggregator_pad_flush (aggpad, self);
1380 GST_OBJECT_LOCK (self);
1381 if (priv->flush_seeking) {
1382 g_atomic_int_set (&aggpad->priv->pending_flush_stop, FALSE);
1383 if (gst_aggregator_all_flush_stop_received_locked (self)) {
1384 GST_OBJECT_UNLOCK (self);
1385 /* That means we received FLUSH_STOP/FLUSH_STOP on
1386 * all sinkpads -- Seeking is Done... sending FLUSH_STOP */
1387 gst_aggregator_flush (self);
1388 gst_pad_push_event (self->srcpad, event);
1391 priv->send_eos = TRUE;
1392 SRC_BROADCAST (self);
1395 GST_INFO_OBJECT (self, "Releasing source pad STREAM_LOCK");
1396 GST_PAD_STREAM_UNLOCK (self->srcpad);
1397 gst_aggregator_start_srcpad_task (self);
1399 GST_OBJECT_UNLOCK (self);
1402 GST_OBJECT_UNLOCK (self);
1405 /* We never forward the event */
1410 GST_DEBUG_OBJECT (aggpad, "EOS");
1412 /* We still have a buffer, and we don't want the subclass to have to
1413 * check for it. Mark pending_eos, eos will be set when steal_buffer is
1418 if (aggpad->priv->num_buffers == 0) {
1419 aggpad->priv->eos = TRUE;
1421 aggpad->priv->pending_eos = TRUE;
1423 PAD_UNLOCK (aggpad);
1425 SRC_BROADCAST (self);
1429 case GST_EVENT_SEGMENT:
1432 GST_OBJECT_LOCK (aggpad);
1433 gst_event_copy_segment (event, &aggpad->segment);
1434 /* We've got a new segment, tail_position is now meaningless
1435 * and may interfere with the time_level calculation
1437 aggpad->priv->tail_position = GST_CLOCK_TIME_NONE;
1438 update_time_level (aggpad, FALSE);
1439 GST_OBJECT_UNLOCK (aggpad);
1440 PAD_UNLOCK (aggpad);
1442 GST_OBJECT_LOCK (self);
1443 self->priv->seqnum = gst_event_get_seqnum (event);
1444 GST_OBJECT_UNLOCK (self);
1447 case GST_EVENT_STREAM_START:
1453 GstClockTime pts, endpts;
1454 GstClockTime duration;
1457 gst_event_parse_gap (event, &pts, &duration);
1458 gapbuf = gst_buffer_new ();
1460 if (GST_CLOCK_TIME_IS_VALID (duration))
1461 endpts = pts + duration;
1463 endpts = GST_CLOCK_TIME_NONE;
1465 GST_OBJECT_LOCK (aggpad);
1466 res = gst_segment_clip (&aggpad->segment, GST_FORMAT_TIME, pts, endpts,
1468 GST_OBJECT_UNLOCK (aggpad);
1471 GST_WARNING_OBJECT (self, "GAP event outside segment, dropping");
1475 if (GST_CLOCK_TIME_IS_VALID (endpts) && GST_CLOCK_TIME_IS_VALID (pts))
1476 duration = endpts - pts;
1478 duration = GST_CLOCK_TIME_NONE;
1480 GST_BUFFER_PTS (gapbuf) = pts;
1481 GST_BUFFER_DURATION (gapbuf) = duration;
1482 GST_BUFFER_FLAG_SET (gapbuf, GST_BUFFER_FLAG_GAP);
1483 GST_BUFFER_FLAG_SET (gapbuf, GST_BUFFER_FLAG_DROPPABLE);
1485 if (gst_aggregator_pad_chain_internal (self, aggpad, gapbuf, FALSE) !=
1487 GST_WARNING_OBJECT (self, "Failed to chain gap buffer");
1497 gst_event_parse_tag (event, &tags);
1499 if (gst_tag_list_get_scope (tags) == GST_TAG_SCOPE_STREAM) {
1500 gst_aggregator_merge_tags (self, tags, GST_TAG_MERGE_REPLACE);
1501 gst_event_unref (event);
1513 GST_DEBUG_OBJECT (pad, "Forwarding event: %" GST_PTR_FORMAT, event);
1514 return gst_pad_event_default (pad, GST_OBJECT (self), event);
1517 GST_DEBUG_OBJECT (pad, "Eating event: %" GST_PTR_FORMAT, event);
1519 gst_event_unref (event);
1524 static inline gboolean
1525 gst_aggregator_stop_pad (GstAggregator * self, GstAggregatorPad * pad,
1526 gpointer unused_udata)
1528 gst_aggregator_pad_flush (pad, self);
1531 pad->priv->flow_return = GST_FLOW_FLUSHING;
1532 pad->priv->negotiated = FALSE;
1533 PAD_BROADCAST_EVENT (pad);
1540 gst_aggregator_stop (GstAggregator * agg)
1542 GstAggregatorClass *klass;
1545 gst_aggregator_reset_flow_values (agg);
1547 gst_aggregator_iterate_sinkpads (agg, gst_aggregator_stop_pad, NULL);
1549 klass = GST_AGGREGATOR_GET_CLASS (agg);
1552 result = klass->stop (agg);
1556 agg->priv->has_peer_latency = FALSE;
1557 agg->priv->peer_latency_live = FALSE;
1558 agg->priv->peer_latency_min = agg->priv->peer_latency_max = FALSE;
1560 if (agg->priv->tags)
1561 gst_tag_list_unref (agg->priv->tags);
1562 agg->priv->tags = NULL;
1564 gst_aggregator_set_allocation (agg, NULL, NULL, NULL, NULL);
1569 /* GstElement vmethods implementations */
1570 static GstStateChangeReturn
1571 gst_aggregator_change_state (GstElement * element, GstStateChange transition)
1573 GstStateChangeReturn ret;
1574 GstAggregator *self = GST_AGGREGATOR (element);
1576 switch (transition) {
1577 case GST_STATE_CHANGE_READY_TO_PAUSED:
1578 if (!gst_aggregator_start (self))
1586 GST_ELEMENT_CLASS (aggregator_parent_class)->change_state (element,
1587 transition)) == GST_STATE_CHANGE_FAILURE)
1591 switch (transition) {
1592 case GST_STATE_CHANGE_PAUSED_TO_READY:
1593 if (!gst_aggregator_stop (self)) {
1594 /* What to do in this case? Error out? */
1595 GST_ERROR_OBJECT (self, "Subclass failed to stop.");
1607 GST_ERROR_OBJECT (element, "parent failed state change");
1612 GST_ERROR_OBJECT (element, "Subclass failed to start");
1613 return GST_STATE_CHANGE_FAILURE;
1618 gst_aggregator_release_pad (GstElement * element, GstPad * pad)
1620 GstAggregator *self = GST_AGGREGATOR (element);
1621 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
1623 GST_INFO_OBJECT (pad, "Removing pad");
1626 gst_aggregator_pad_set_flushing (aggpad, GST_FLOW_FLUSHING, TRUE);
1627 gst_element_remove_pad (element, pad);
1629 self->priv->has_peer_latency = FALSE;
1630 SRC_BROADCAST (self);
1634 static GstAggregatorPad *
1635 gst_aggregator_default_create_new_pad (GstAggregator * self,
1636 GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
1638 GstAggregatorPad *agg_pad;
1639 GstAggregatorPrivate *priv = self->priv;
1643 if (templ->direction != GST_PAD_SINK)
1646 if (templ->presence != GST_PAD_REQUEST)
1649 GST_OBJECT_LOCK (self);
1650 if (req_name == NULL || strlen (req_name) < 6
1651 || !g_str_has_prefix (req_name, "sink_")) {
1652 /* no name given when requesting the pad, use next available int */
1653 serial = ++priv->max_padserial;
1655 /* parse serial number from requested padname */
1656 serial = g_ascii_strtoull (&req_name[5], NULL, 10);
1657 if (serial > priv->max_padserial)
1658 priv->max_padserial = serial;
1661 name = g_strdup_printf ("sink_%u", serial);
1662 agg_pad = g_object_new (GST_AGGREGATOR_GET_CLASS (self)->sinkpads_type,
1663 "name", name, "direction", GST_PAD_SINK, "template", templ, NULL);
1666 GST_OBJECT_UNLOCK (self);
1673 GST_WARNING_OBJECT (self, "request new pad that is not a SINK pad");
1678 GST_WARNING_OBJECT (self, "request new pad that is not a REQUEST pad");
1684 gst_aggregator_request_new_pad (GstElement * element,
1685 GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
1687 GstAggregator *self;
1688 GstAggregatorPad *agg_pad;
1689 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (element);
1690 GstAggregatorPrivate *priv = GST_AGGREGATOR (element)->priv;
1692 self = GST_AGGREGATOR (element);
1694 agg_pad = klass->create_new_pad (self, templ, req_name, caps);
1696 GST_ERROR_OBJECT (element, "Couldn't create new pad");
1700 GST_DEBUG_OBJECT (element, "Adding pad %s", GST_PAD_NAME (agg_pad));
1703 gst_pad_set_active (GST_PAD (agg_pad), TRUE);
1705 /* add the pad to the element */
1706 gst_element_add_pad (element, GST_PAD (agg_pad));
1708 return GST_PAD (agg_pad);
1711 /* Must be called with SRC_LOCK held */
1714 gst_aggregator_query_latency_unlocked (GstAggregator * self, GstQuery * query)
1716 gboolean query_ret, live;
1717 GstClockTime our_latency, min, max;
1719 query_ret = gst_pad_query_default (self->srcpad, GST_OBJECT (self), query);
1722 GST_WARNING_OBJECT (self, "Latency query failed");
1726 gst_query_parse_latency (query, &live, &min, &max);
1728 our_latency = self->priv->latency;
1730 if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (min))) {
1731 GST_ERROR_OBJECT (self, "Invalid minimum latency %" GST_TIME_FORMAT
1732 ". Please file a bug at " PACKAGE_BUGREPORT ".", GST_TIME_ARGS (min));
1736 if (min > max && GST_CLOCK_TIME_IS_VALID (max)) {
1737 GST_ELEMENT_WARNING (self, CORE, CLOCK, (NULL),
1738 ("Impossible to configure latency: max %" GST_TIME_FORMAT " < min %"
1739 GST_TIME_FORMAT ". Add queues or other buffering elements.",
1740 GST_TIME_ARGS (max), GST_TIME_ARGS (min)));
1744 self->priv->peer_latency_live = live;
1745 self->priv->peer_latency_min = min;
1746 self->priv->peer_latency_max = max;
1747 self->priv->has_peer_latency = TRUE;
1751 min += self->priv->sub_latency_min;
1752 if (GST_CLOCK_TIME_IS_VALID (self->priv->sub_latency_max)
1753 && GST_CLOCK_TIME_IS_VALID (max))
1754 max += self->priv->sub_latency_max + our_latency;
1756 max = GST_CLOCK_TIME_NONE;
1758 SRC_BROADCAST (self);
1760 GST_DEBUG_OBJECT (self, "configured latency live:%s min:%" G_GINT64_FORMAT
1761 " max:%" G_GINT64_FORMAT, live ? "true" : "false", min, max);
1763 gst_query_set_latency (query, live, min, max);
1769 * MUST be called with the src_lock held.
1771 * See gst_aggregator_get_latency() for doc
1774 gst_aggregator_get_latency_unlocked (GstAggregator * self)
1776 GstClockTime latency;
1778 g_return_val_if_fail (GST_IS_AGGREGATOR (self), 0);
1780 if (!self->priv->has_peer_latency) {
1781 GstQuery *query = gst_query_new_latency ();
1784 ret = gst_aggregator_query_latency_unlocked (self, query);
1785 gst_query_unref (query);
1787 return GST_CLOCK_TIME_NONE;
1790 if (!self->priv->has_peer_latency || !self->priv->peer_latency_live)
1791 return GST_CLOCK_TIME_NONE;
1793 /* latency_min is never GST_CLOCK_TIME_NONE by construction */
1794 latency = self->priv->peer_latency_min;
1797 latency += self->priv->latency;
1798 latency += self->priv->sub_latency_min;
1804 * gst_aggregator_get_latency:
1805 * @self: a #GstAggregator
1807 * Retrieves the latency values reported by @self in response to the latency
1808 * query, or %GST_CLOCK_TIME_NONE if there is not live source connected and the element
1809 * will not wait for the clock.
1811 * Typically only called by subclasses.
1813 * Returns: The latency or %GST_CLOCK_TIME_NONE if the element does not sync
1816 gst_aggregator_get_latency (GstAggregator * self)
1821 ret = gst_aggregator_get_latency_unlocked (self);
1828 gst_aggregator_send_event (GstElement * element, GstEvent * event)
1830 GstAggregator *self = GST_AGGREGATOR (element);
1832 GST_STATE_LOCK (element);
1833 if (GST_EVENT_TYPE (event) == GST_EVENT_SEEK &&
1834 GST_STATE (element) < GST_STATE_PAUSED) {
1838 GstSeekType start_type, stop_type;
1841 gst_event_parse_seek (event, &rate, &fmt, &flags, &start_type,
1842 &start, &stop_type, &stop);
1844 GST_OBJECT_LOCK (self);
1845 gst_segment_do_seek (&self->segment, rate, fmt, flags, start_type, start,
1846 stop_type, stop, NULL);
1847 self->priv->seqnum = gst_event_get_seqnum (event);
1848 self->priv->first_buffer = FALSE;
1849 GST_OBJECT_UNLOCK (self);
1851 GST_DEBUG_OBJECT (element, "Storing segment %" GST_PTR_FORMAT, event);
1853 GST_STATE_UNLOCK (element);
1856 return GST_ELEMENT_CLASS (aggregator_parent_class)->send_event (element,
1861 gst_aggregator_default_src_query (GstAggregator * self, GstQuery * query)
1863 gboolean res = TRUE;
1865 switch (GST_QUERY_TYPE (query)) {
1866 case GST_QUERY_SEEKING:
1870 /* don't pass it along as some (file)sink might claim it does
1871 * whereas with a collectpads in between that will not likely work */
1872 gst_query_parse_seeking (query, &format, NULL, NULL, NULL);
1873 gst_query_set_seeking (query, format, FALSE, 0, -1);
1878 case GST_QUERY_LATENCY:
1880 res = gst_aggregator_query_latency_unlocked (self, query);
1884 return gst_pad_query_default (self->srcpad, GST_OBJECT (self), query);
1891 gst_aggregator_event_forward_func (GstPad * pad, gpointer user_data)
1893 EventData *evdata = user_data;
1894 gboolean ret = TRUE;
1895 GstPad *peer = gst_pad_get_peer (pad);
1896 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
1899 if (evdata->only_to_active_pads && aggpad->priv->first_buffer) {
1900 GST_DEBUG_OBJECT (pad, "not sending event to inactive pad");
1903 ret = gst_pad_send_event (peer, gst_event_ref (evdata->event));
1904 GST_DEBUG_OBJECT (pad, "return of event push is %d", ret);
1905 gst_object_unref (peer);
1910 if (GST_EVENT_TYPE (evdata->event) == GST_EVENT_SEEK) {
1911 GstQuery *seeking = gst_query_new_seeking (GST_FORMAT_TIME);
1913 GST_DEBUG_OBJECT (pad, "Event %" GST_PTR_FORMAT " failed", evdata->event);
1915 if (gst_pad_query (peer, seeking)) {
1918 gst_query_parse_seeking (seeking, NULL, &seekable, NULL, NULL);
1920 if (seekable == FALSE) {
1921 GST_INFO_OBJECT (pad,
1922 "Source not seekable, We failed but it does not matter!");
1927 GST_ERROR_OBJECT (pad, "Query seeking FAILED");
1930 gst_query_unref (seeking);
1933 if (evdata->flush) {
1935 aggpad->priv->pending_flush_start = FALSE;
1936 aggpad->priv->pending_flush_stop = FALSE;
1937 PAD_UNLOCK (aggpad);
1940 evdata->one_actually_seeked = TRUE;
1943 evdata->result &= ret;
1945 /* Always send to all pads */
1950 gst_aggregator_forward_event_to_all_sinkpads (GstAggregator * self,
1951 GstEvent * event, gboolean flush, gboolean only_to_active_pads)
1955 evdata.event = event;
1956 evdata.result = TRUE;
1957 evdata.flush = flush;
1958 evdata.one_actually_seeked = FALSE;
1959 evdata.only_to_active_pads = only_to_active_pads;
1961 /* We first need to set all pads as flushing in a first pass
1962 * as flush_start flush_stop is sometimes sent synchronously
1963 * while we send the seek event */
1967 GST_OBJECT_LOCK (self);
1968 for (l = GST_ELEMENT_CAST (self)->sinkpads; l != NULL; l = l->next) {
1969 GstAggregatorPad *pad = l->data;
1972 pad->priv->pending_flush_start = TRUE;
1973 pad->priv->pending_flush_stop = FALSE;
1976 GST_OBJECT_UNLOCK (self);
1979 gst_pad_forward (self->srcpad, gst_aggregator_event_forward_func, &evdata);
1981 gst_event_unref (event);
1987 gst_aggregator_do_seek (GstAggregator * self, GstEvent * event)
1992 GstSeekType start_type, stop_type;
1996 GstAggregatorPrivate *priv = self->priv;
1998 gst_event_parse_seek (event, &rate, &fmt, &flags, &start_type,
1999 &start, &stop_type, &stop);
2001 GST_INFO_OBJECT (self, "starting SEEK");
2003 flush = flags & GST_SEEK_FLAG_FLUSH;
2005 GST_OBJECT_LOCK (self);
2007 priv->pending_flush_start = TRUE;
2008 priv->flush_seeking = TRUE;
2011 gst_segment_do_seek (&self->segment, rate, fmt, flags, start_type, start,
2012 stop_type, stop, NULL);
2014 /* Seeking sets a position */
2015 self->priv->first_buffer = FALSE;
2016 GST_OBJECT_UNLOCK (self);
2018 /* forward the seek upstream */
2020 gst_aggregator_forward_event_to_all_sinkpads (self, event, flush, FALSE);
2023 if (!evdata.result || !evdata.one_actually_seeked) {
2024 GST_OBJECT_LOCK (self);
2025 priv->flush_seeking = FALSE;
2026 priv->pending_flush_start = FALSE;
2027 GST_OBJECT_UNLOCK (self);
2030 GST_INFO_OBJECT (self, "seek done, result: %d", evdata.result);
2032 return evdata.result;
2036 gst_aggregator_default_src_event (GstAggregator * self, GstEvent * event)
2039 gboolean res = TRUE;
2041 switch (GST_EVENT_TYPE (event)) {
2042 case GST_EVENT_SEEK:
2044 gst_event_ref (event);
2045 res = gst_aggregator_do_seek (self, event);
2046 gst_event_unref (event);
2050 case GST_EVENT_NAVIGATION:
2052 /* navigation is rather pointless. */
2054 gst_event_unref (event);
2063 /* Don't forward QOS events to pads that had no active buffer yet. Otherwise
2064 * they will receive a QOS event that has earliest_time=0 (because we can't
2065 * have negative timestamps), and consider their buffer as too late */
2067 gst_aggregator_forward_event_to_all_sinkpads (self, event, FALSE,
2068 GST_EVENT_TYPE (event) == GST_EVENT_QOS);
2069 res = evdata.result;
2076 gst_aggregator_src_pad_event_func (GstPad * pad, GstObject * parent,
2079 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2081 return klass->src_event (GST_AGGREGATOR (parent), event);
2085 gst_aggregator_src_pad_query_func (GstPad * pad, GstObject * parent,
2088 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2090 return klass->src_query (GST_AGGREGATOR (parent), query);
2094 gst_aggregator_src_pad_activate_mode_func (GstPad * pad,
2095 GstObject * parent, GstPadMode mode, gboolean active)
2097 GstAggregator *self = GST_AGGREGATOR (parent);
2098 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2100 if (klass->src_activate) {
2101 if (klass->src_activate (self, mode, active) == FALSE) {
2106 if (active == TRUE) {
2108 case GST_PAD_MODE_PUSH:
2110 GST_INFO_OBJECT (pad, "Activating pad!");
2111 gst_aggregator_start_srcpad_task (self);
2116 GST_ERROR_OBJECT (pad, "Only supported mode is PUSH");
2123 GST_INFO_OBJECT (self, "Deactivating srcpad");
2124 gst_aggregator_stop_srcpad_task (self, FALSE);
2130 gst_aggregator_default_sink_query (GstAggregator * self,
2131 GstAggregatorPad * aggpad, GstQuery * query)
2133 GstPad *pad = GST_PAD (aggpad);
2135 if (GST_QUERY_TYPE (query) == GST_QUERY_ALLOCATION) {
2136 GstQuery *decide_query = NULL;
2137 GstAggregatorClass *agg_class;
2140 GST_OBJECT_LOCK (self);
2142 if (G_UNLIKELY (!aggpad->priv->negotiated)) {
2143 GST_DEBUG_OBJECT (self,
2144 "not negotiated yet, can't answer ALLOCATION query");
2145 PAD_UNLOCK (aggpad);
2146 GST_OBJECT_UNLOCK (self);
2151 if ((decide_query = self->priv->allocation_query))
2152 gst_query_ref (decide_query);
2153 PAD_UNLOCK (aggpad);
2154 GST_OBJECT_UNLOCK (self);
2156 GST_DEBUG_OBJECT (self,
2157 "calling propose allocation with query %" GST_PTR_FORMAT, decide_query);
2159 agg_class = GST_AGGREGATOR_GET_CLASS (self);
2161 /* pass the query to the propose_allocation vmethod if any */
2162 if (agg_class->propose_allocation)
2163 ret = agg_class->propose_allocation (self, aggpad, decide_query, query);
2168 gst_query_unref (decide_query);
2170 GST_DEBUG_OBJECT (self, "ALLOCATION ret %d, %" GST_PTR_FORMAT, ret, query);
2174 return gst_pad_query_default (pad, GST_OBJECT (self), query);
2178 gst_aggregator_finalize (GObject * object)
2180 GstAggregator *self = (GstAggregator *) object;
2182 g_mutex_clear (&self->priv->src_lock);
2183 g_cond_clear (&self->priv->src_cond);
2185 G_OBJECT_CLASS (aggregator_parent_class)->finalize (object);
2189 * gst_aggregator_set_latency_property:
2190 * @agg: a #GstAggregator
2191 * @latency: the new latency value (in nanoseconds).
2193 * Sets the new latency value to @latency. This value is used to limit the
2194 * amount of time a pad waits for data to appear before considering the pad
2198 gst_aggregator_set_latency_property (GstAggregator * self, gint64 latency)
2202 g_return_if_fail (GST_IS_AGGREGATOR (self));
2203 g_return_if_fail (GST_CLOCK_TIME_IS_VALID (latency));
2206 changed = (self->priv->latency != latency);
2211 GST_OBJECT_LOCK (self);
2212 /* First lock all the pads */
2213 for (item = GST_ELEMENT_CAST (self)->sinkpads; item; item = item->next) {
2214 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (item->data);
2218 self->priv->latency = latency;
2220 SRC_BROADCAST (self);
2222 /* Now wake up the pads */
2223 for (item = GST_ELEMENT_CAST (self)->sinkpads; item; item = item->next) {
2224 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (item->data);
2225 PAD_BROADCAST_EVENT (aggpad);
2226 PAD_UNLOCK (aggpad);
2228 GST_OBJECT_UNLOCK (self);
2234 gst_element_post_message (GST_ELEMENT_CAST (self),
2235 gst_message_new_latency (GST_OBJECT_CAST (self)));
2239 * gst_aggregator_get_latency_property:
2240 * @agg: a #GstAggregator
2242 * Gets the latency value. See gst_aggregator_set_latency for
2245 * Returns: The time in nanoseconds to wait for data to arrive on a sink pad
2246 * before a pad is deemed unresponsive. A value of -1 means an
2250 gst_aggregator_get_latency_property (GstAggregator * agg)
2254 g_return_val_if_fail (GST_IS_AGGREGATOR (agg), -1);
2256 GST_OBJECT_LOCK (agg);
2257 res = agg->priv->latency;
2258 GST_OBJECT_UNLOCK (agg);
2264 gst_aggregator_set_property (GObject * object, guint prop_id,
2265 const GValue * value, GParamSpec * pspec)
2267 GstAggregator *agg = GST_AGGREGATOR (object);
2271 gst_aggregator_set_latency_property (agg, g_value_get_int64 (value));
2273 case PROP_START_TIME_SELECTION:
2274 agg->priv->start_time_selection = g_value_get_enum (value);
2276 case PROP_START_TIME:
2277 agg->priv->start_time = g_value_get_uint64 (value);
2280 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2286 gst_aggregator_get_property (GObject * object, guint prop_id,
2287 GValue * value, GParamSpec * pspec)
2289 GstAggregator *agg = GST_AGGREGATOR (object);
2293 g_value_set_int64 (value, gst_aggregator_get_latency_property (agg));
2295 case PROP_START_TIME_SELECTION:
2296 g_value_set_enum (value, agg->priv->start_time_selection);
2298 case PROP_START_TIME:
2299 g_value_set_uint64 (value, agg->priv->start_time);
2302 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2307 /* GObject vmethods implementations */
2309 gst_aggregator_class_init (GstAggregatorClass * klass)
2311 GObjectClass *gobject_class = (GObjectClass *) klass;
2312 GstElementClass *gstelement_class = (GstElementClass *) klass;
2314 aggregator_parent_class = g_type_class_peek_parent (klass);
2315 g_type_class_add_private (klass, sizeof (GstAggregatorPrivate));
2317 GST_DEBUG_CATEGORY_INIT (aggregator_debug, "aggregator",
2318 GST_DEBUG_FG_MAGENTA, "GstAggregator");
2320 klass->sinkpads_type = GST_TYPE_AGGREGATOR_PAD;
2322 klass->sink_event = gst_aggregator_default_sink_event;
2323 klass->sink_query = gst_aggregator_default_sink_query;
2325 klass->src_event = gst_aggregator_default_src_event;
2326 klass->src_query = gst_aggregator_default_src_query;
2328 klass->create_new_pad = gst_aggregator_default_create_new_pad;
2329 klass->update_src_caps = gst_aggregator_default_update_src_caps;
2330 klass->fixate_src_caps = gst_aggregator_default_fixate_src_caps;
2331 klass->negotiated_src_caps = gst_aggregator_default_negotiated_src_caps;
2333 gstelement_class->request_new_pad =
2334 GST_DEBUG_FUNCPTR (gst_aggregator_request_new_pad);
2335 gstelement_class->send_event = GST_DEBUG_FUNCPTR (gst_aggregator_send_event);
2336 gstelement_class->release_pad =
2337 GST_DEBUG_FUNCPTR (gst_aggregator_release_pad);
2338 gstelement_class->change_state =
2339 GST_DEBUG_FUNCPTR (gst_aggregator_change_state);
2341 gobject_class->set_property = gst_aggregator_set_property;
2342 gobject_class->get_property = gst_aggregator_get_property;
2343 gobject_class->finalize = gst_aggregator_finalize;
2345 g_object_class_install_property (gobject_class, PROP_LATENCY,
2346 g_param_spec_int64 ("latency", "Buffer latency",
2347 "Additional latency in live mode to allow upstream "
2348 "to take longer to produce buffers for the current "
2349 "position (in nanoseconds)", 0,
2350 (G_MAXLONG == G_MAXINT64) ? G_MAXINT64 : (G_MAXLONG * GST_SECOND - 1),
2351 DEFAULT_LATENCY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
2353 g_object_class_install_property (gobject_class, PROP_START_TIME_SELECTION,
2354 g_param_spec_enum ("start-time-selection", "Start Time Selection",
2355 "Decides which start time is output",
2356 gst_aggregator_start_time_selection_get_type (),
2357 DEFAULT_START_TIME_SELECTION,
2358 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
2360 g_object_class_install_property (gobject_class, PROP_START_TIME,
2361 g_param_spec_uint64 ("start-time", "Start Time",
2362 "Start time to use if start-time-selection=set", 0,
2364 DEFAULT_START_TIME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
2366 GST_DEBUG_REGISTER_FUNCPTR (gst_aggregator_stop_pad);
2370 gst_aggregator_init (GstAggregator * self, GstAggregatorClass * klass)
2372 GstPadTemplate *pad_template;
2373 GstAggregatorPrivate *priv;
2375 g_return_if_fail (klass->aggregate != NULL);
2378 G_TYPE_INSTANCE_GET_PRIVATE (self, GST_TYPE_AGGREGATOR,
2379 GstAggregatorPrivate);
2384 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass), "src");
2385 g_return_if_fail (pad_template != NULL);
2387 priv->max_padserial = -1;
2388 priv->tags_changed = FALSE;
2390 self->priv->peer_latency_live = FALSE;
2391 self->priv->peer_latency_min = self->priv->sub_latency_min = 0;
2392 self->priv->peer_latency_max = self->priv->sub_latency_max = 0;
2393 self->priv->has_peer_latency = FALSE;
2394 gst_aggregator_reset_flow_values (self);
2396 self->srcpad = gst_pad_new_from_template (pad_template, "src");
2398 gst_pad_set_event_function (self->srcpad,
2399 GST_DEBUG_FUNCPTR (gst_aggregator_src_pad_event_func));
2400 gst_pad_set_query_function (self->srcpad,
2401 GST_DEBUG_FUNCPTR (gst_aggregator_src_pad_query_func));
2402 gst_pad_set_activatemode_function (self->srcpad,
2403 GST_DEBUG_FUNCPTR (gst_aggregator_src_pad_activate_mode_func));
2405 gst_element_add_pad (GST_ELEMENT (self), self->srcpad);
2407 self->priv->latency = DEFAULT_LATENCY;
2408 self->priv->start_time_selection = DEFAULT_START_TIME_SELECTION;
2409 self->priv->start_time = DEFAULT_START_TIME;
2411 g_mutex_init (&self->priv->src_lock);
2412 g_cond_init (&self->priv->src_cond);
2415 /* we can't use G_DEFINE_ABSTRACT_TYPE because we need the klass in the _init
2416 * method to get to the padtemplates */
2418 gst_aggregator_get_type (void)
2420 static volatile gsize type = 0;
2422 if (g_once_init_enter (&type)) {
2424 static const GTypeInfo info = {
2425 sizeof (GstAggregatorClass),
2428 (GClassInitFunc) gst_aggregator_class_init,
2431 sizeof (GstAggregator),
2433 (GInstanceInitFunc) gst_aggregator_init,
2436 _type = g_type_register_static (GST_TYPE_ELEMENT,
2437 "GstAggregator", &info, G_TYPE_FLAG_ABSTRACT);
2438 g_once_init_leave (&type, _type);
2443 /* Must be called with SRC lock and PAD lock held */
2445 gst_aggregator_pad_has_space (GstAggregator * self, GstAggregatorPad * aggpad)
2447 /* Empty queue always has space */
2448 if (aggpad->priv->num_buffers == 0 && aggpad->priv->clipped_buffer == NULL)
2451 /* We also want at least two buffers, one is being processed and one is ready
2452 * for the next iteration when we operate in live mode. */
2453 if (self->priv->peer_latency_live && aggpad->priv->num_buffers < 2)
2456 /* zero latency, if there is a buffer, it's full */
2457 if (self->priv->latency == 0)
2460 /* Allow no more buffers than the latency */
2461 return (aggpad->priv->time_level <= self->priv->latency);
2464 /* Must be called with the PAD_LOCK held */
2466 apply_buffer (GstAggregatorPad * aggpad, GstBuffer * buffer, gboolean head)
2468 GstClockTime timestamp;
2470 if (GST_BUFFER_DTS_IS_VALID (buffer))
2471 timestamp = GST_BUFFER_DTS (buffer);
2473 timestamp = GST_BUFFER_PTS (buffer);
2475 if (timestamp == GST_CLOCK_TIME_NONE) {
2477 timestamp = aggpad->priv->head_position;
2479 timestamp = aggpad->priv->tail_position;
2483 if (GST_BUFFER_DURATION_IS_VALID (buffer))
2484 timestamp += GST_BUFFER_DURATION (buffer);
2487 aggpad->priv->head_position = timestamp;
2489 aggpad->priv->tail_position = timestamp;
2491 update_time_level (aggpad, head);
2494 static GstFlowReturn
2495 gst_aggregator_pad_chain_internal (GstAggregator * self,
2496 GstAggregatorPad * aggpad, GstBuffer * buffer, gboolean head)
2498 GstFlowReturn flow_return;
2499 GstClockTime buf_pts;
2501 GST_DEBUG_OBJECT (aggpad, "Start chaining a buffer %" GST_PTR_FORMAT, buffer);
2503 PAD_FLUSH_LOCK (aggpad);
2506 flow_return = aggpad->priv->flow_return;
2507 if (flow_return != GST_FLOW_OK)
2510 if (aggpad->priv->pending_eos == TRUE)
2513 PAD_UNLOCK (aggpad);
2515 buf_pts = GST_BUFFER_PTS (buffer);
2519 GST_OBJECT_LOCK (self);
2522 if (aggpad->priv->first_buffer) {
2523 self->priv->has_peer_latency = FALSE;
2524 aggpad->priv->first_buffer = FALSE;
2527 if (gst_aggregator_pad_has_space (self, aggpad)
2528 && aggpad->priv->flow_return == GST_FLOW_OK) {
2530 g_queue_push_head (&aggpad->priv->buffers, buffer);
2532 g_queue_push_tail (&aggpad->priv->buffers, buffer);
2533 apply_buffer (aggpad, buffer, head);
2534 aggpad->priv->num_buffers++;
2536 SRC_BROADCAST (self);
2540 flow_return = aggpad->priv->flow_return;
2541 if (flow_return != GST_FLOW_OK) {
2542 GST_OBJECT_UNLOCK (self);
2546 GST_DEBUG_OBJECT (aggpad, "Waiting for buffer to be consumed");
2547 GST_OBJECT_UNLOCK (self);
2549 PAD_WAIT_EVENT (aggpad);
2551 PAD_UNLOCK (aggpad);
2554 if (self->priv->first_buffer) {
2555 GstClockTime start_time;
2557 switch (self->priv->start_time_selection) {
2558 case GST_AGGREGATOR_START_TIME_SELECTION_ZERO:
2562 case GST_AGGREGATOR_START_TIME_SELECTION_FIRST:
2563 GST_OBJECT_LOCK (aggpad);
2564 if (aggpad->priv->head_segment.format == GST_FORMAT_TIME) {
2565 start_time = buf_pts;
2566 if (start_time != -1) {
2567 start_time = MAX (start_time, aggpad->priv->head_segment.start);
2569 gst_segment_to_running_time (&aggpad->priv->head_segment,
2570 GST_FORMAT_TIME, start_time);
2574 GST_WARNING_OBJECT (aggpad,
2575 "Ignoring request of selecting the first start time "
2576 "as the segment is a %s segment instead of a time segment",
2577 gst_format_get_name (aggpad->segment.format));
2579 GST_OBJECT_UNLOCK (aggpad);
2581 case GST_AGGREGATOR_START_TIME_SELECTION_SET:
2582 start_time = self->priv->start_time;
2583 if (start_time == -1)
2588 if (start_time != -1) {
2589 if (self->segment.position == -1)
2590 self->segment.position = start_time;
2592 self->segment.position = MIN (start_time, self->segment.position);
2594 GST_DEBUG_OBJECT (self, "Selecting start time %" GST_TIME_FORMAT,
2595 GST_TIME_ARGS (start_time));
2599 PAD_UNLOCK (aggpad);
2600 GST_OBJECT_UNLOCK (self);
2603 PAD_FLUSH_UNLOCK (aggpad);
2605 GST_DEBUG_OBJECT (aggpad, "Done chaining");
2610 PAD_UNLOCK (aggpad);
2611 PAD_FLUSH_UNLOCK (aggpad);
2613 GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping buffer",
2614 gst_flow_get_name (flow_return));
2616 gst_buffer_unref (buffer);
2621 PAD_UNLOCK (aggpad);
2622 PAD_FLUSH_UNLOCK (aggpad);
2624 gst_buffer_unref (buffer);
2625 GST_DEBUG_OBJECT (aggpad, "We are EOS already...");
2627 return GST_FLOW_EOS;
2630 static GstFlowReturn
2631 gst_aggregator_pad_chain (GstPad * pad, GstObject * object, GstBuffer * buffer)
2633 return gst_aggregator_pad_chain_internal (GST_AGGREGATOR_CAST (object),
2634 GST_AGGREGATOR_PAD_CAST (pad), buffer, TRUE);
2638 gst_aggregator_pad_query_func (GstPad * pad, GstObject * parent,
2641 GstAggregator *self = GST_AGGREGATOR (parent);
2642 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
2643 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2645 if (GST_QUERY_IS_SERIALIZED (query)) {
2647 gboolean ret = FALSE;
2652 if (aggpad->priv->flow_return != GST_FLOW_OK) {
2657 g_queue_push_head (&aggpad->priv->buffers, query);
2658 SRC_BROADCAST (self);
2661 while (!gst_aggregator_pad_queue_is_empty (aggpad)
2662 && aggpad->priv->flow_return == GST_FLOW_OK) {
2663 GST_DEBUG_OBJECT (aggpad, "Waiting for buffer to be consumed");
2664 PAD_WAIT_EVENT (aggpad);
2667 s = gst_query_writable_structure (query);
2668 if (gst_structure_get_boolean (s, "gst-aggregator-retval", &ret))
2669 gst_structure_remove_field (s, "gst-aggregator-retval");
2671 g_queue_remove (&aggpad->priv->buffers, query);
2673 if (aggpad->priv->flow_return != GST_FLOW_OK)
2676 PAD_UNLOCK (aggpad);
2681 return klass->sink_query (self, aggpad, query);
2684 GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping query",
2685 gst_flow_get_name (aggpad->priv->flow_return));
2686 PAD_UNLOCK (aggpad);
2691 static GstFlowReturn
2692 gst_aggregator_pad_event_func (GstPad * pad, GstObject * parent,
2695 GstFlowReturn ret = GST_FLOW_OK;
2696 GstAggregator *self = GST_AGGREGATOR (parent);
2697 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
2698 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2700 if (GST_EVENT_IS_SERIALIZED (event) && GST_EVENT_TYPE (event) != GST_EVENT_EOS
2701 /* && GST_EVENT_TYPE (event) != GST_EVENT_SEGMENT_DONE */ ) {
2705 if (aggpad->priv->flow_return != GST_FLOW_OK
2706 && GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP) {
2707 ret = aggpad->priv->flow_return;
2711 if (GST_EVENT_TYPE (event) == GST_EVENT_SEGMENT) {
2712 GST_OBJECT_LOCK (aggpad);
2713 gst_event_copy_segment (event, &aggpad->priv->head_segment);
2714 aggpad->priv->head_position = aggpad->priv->head_segment.position;
2715 update_time_level (aggpad, TRUE);
2716 GST_OBJECT_UNLOCK (aggpad);
2719 if (GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP) {
2720 GST_DEBUG_OBJECT (aggpad, "Store event in queue: %" GST_PTR_FORMAT,
2722 g_queue_push_head (&aggpad->priv->buffers, event);
2724 SRC_BROADCAST (self);
2726 PAD_UNLOCK (aggpad);
2731 if (!klass->sink_event (self, aggpad, event)) {
2732 /* Copied from GstPad to convert boolean to a GstFlowReturn in
2733 * the event handling func */
2734 ret = GST_FLOW_ERROR;
2741 GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping event",
2742 gst_flow_get_name (aggpad->priv->flow_return));
2743 PAD_UNLOCK (aggpad);
2745 if (GST_EVENT_IS_STICKY (event))
2746 gst_pad_store_sticky_event (pad, event);
2747 gst_event_unref (event);
2753 gst_aggregator_pad_activate_mode_func (GstPad * pad,
2754 GstObject * parent, GstPadMode mode, gboolean active)
2756 GstAggregator *self = GST_AGGREGATOR (parent);
2757 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
2759 if (active == FALSE) {
2761 gst_aggregator_pad_set_flushing (aggpad, GST_FLOW_FLUSHING, TRUE);
2762 SRC_BROADCAST (self);
2766 aggpad->priv->flow_return = GST_FLOW_OK;
2767 PAD_BROADCAST_EVENT (aggpad);
2768 PAD_UNLOCK (aggpad);
2774 /***********************************
2775 * GstAggregatorPad implementation *
2776 ************************************/
2777 G_DEFINE_TYPE (GstAggregatorPad, gst_aggregator_pad, GST_TYPE_PAD);
2780 gst_aggregator_pad_constructed (GObject * object)
2782 GstPad *pad = GST_PAD (object);
2784 gst_pad_set_chain_function (pad,
2785 GST_DEBUG_FUNCPTR (gst_aggregator_pad_chain));
2786 gst_pad_set_event_full_function_full (pad,
2787 GST_DEBUG_FUNCPTR (gst_aggregator_pad_event_func), NULL, NULL);
2788 gst_pad_set_query_function (pad,
2789 GST_DEBUG_FUNCPTR (gst_aggregator_pad_query_func));
2790 gst_pad_set_activatemode_function (pad,
2791 GST_DEBUG_FUNCPTR (gst_aggregator_pad_activate_mode_func));
2795 gst_aggregator_pad_finalize (GObject * object)
2797 GstAggregatorPad *pad = (GstAggregatorPad *) object;
2799 g_cond_clear (&pad->priv->event_cond);
2800 g_mutex_clear (&pad->priv->flush_lock);
2801 g_mutex_clear (&pad->priv->lock);
2803 G_OBJECT_CLASS (gst_aggregator_pad_parent_class)->finalize (object);
2807 gst_aggregator_pad_dispose (GObject * object)
2809 GstAggregatorPad *pad = (GstAggregatorPad *) object;
2811 gst_aggregator_pad_set_flushing (pad, GST_FLOW_FLUSHING, TRUE);
2813 G_OBJECT_CLASS (gst_aggregator_pad_parent_class)->dispose (object);
2817 gst_aggregator_pad_class_init (GstAggregatorPadClass * klass)
2819 GObjectClass *gobject_class = (GObjectClass *) klass;
2821 g_type_class_add_private (klass, sizeof (GstAggregatorPadPrivate));
2823 gobject_class->constructed = gst_aggregator_pad_constructed;
2824 gobject_class->finalize = gst_aggregator_pad_finalize;
2825 gobject_class->dispose = gst_aggregator_pad_dispose;
2829 gst_aggregator_pad_init (GstAggregatorPad * pad)
2832 G_TYPE_INSTANCE_GET_PRIVATE (pad, GST_TYPE_AGGREGATOR_PAD,
2833 GstAggregatorPadPrivate);
2835 g_queue_init (&pad->priv->buffers);
2836 g_cond_init (&pad->priv->event_cond);
2838 g_mutex_init (&pad->priv->flush_lock);
2839 g_mutex_init (&pad->priv->lock);
2841 gst_aggregator_pad_reset_unlocked (pad);
2842 pad->priv->negotiated = FALSE;
2845 /* Must be called with the PAD_LOCK held */
2847 gst_aggregator_pad_buffer_consumed (GstAggregatorPad * pad)
2849 pad->priv->num_buffers--;
2850 GST_TRACE_OBJECT (pad, "Consuming buffer");
2851 if (gst_aggregator_pad_queue_is_empty (pad) && pad->priv->pending_eos) {
2852 pad->priv->pending_eos = FALSE;
2853 pad->priv->eos = TRUE;
2855 PAD_BROADCAST_EVENT (pad);
2858 /* Must be called with the PAD_LOCK held */
2860 gst_aggregator_pad_clip_buffer_unlocked (GstAggregatorPad * pad)
2862 GstAggregator *self = NULL;
2863 GstAggregatorClass *aggclass = NULL;
2864 GstBuffer *buffer = NULL;
2866 while (pad->priv->clipped_buffer == NULL &&
2867 GST_IS_BUFFER (g_queue_peek_tail (&pad->priv->buffers))) {
2868 buffer = g_queue_pop_tail (&pad->priv->buffers);
2870 apply_buffer (pad, buffer, FALSE);
2872 /* We only take the parent here so that it's not taken if the buffer is
2873 * already clipped or if the queue is empty.
2876 self = GST_AGGREGATOR (gst_pad_get_parent_element (GST_PAD (pad)));
2878 gst_buffer_unref (buffer);
2882 aggclass = GST_AGGREGATOR_GET_CLASS (self);
2885 if (aggclass->clip) {
2886 GST_TRACE_OBJECT (pad, "Clipping: %" GST_PTR_FORMAT, buffer);
2888 buffer = aggclass->clip (self, pad, buffer);
2890 if (buffer == NULL) {
2891 gst_aggregator_pad_buffer_consumed (pad);
2892 GST_TRACE_OBJECT (pad, "Clipping consumed the buffer");
2896 pad->priv->clipped_buffer = buffer;
2900 gst_object_unref (self);
2904 * gst_aggregator_pad_steal_buffer:
2905 * @pad: the pad to get buffer from
2907 * Steal the ref to the buffer currently queued in @pad.
2909 * Returns: (transfer full): The buffer in @pad or NULL if no buffer was
2910 * queued. You should unref the buffer after usage.
2913 gst_aggregator_pad_steal_buffer (GstAggregatorPad * pad)
2919 gst_aggregator_pad_clip_buffer_unlocked (pad);
2921 buffer = pad->priv->clipped_buffer;
2922 pad->priv->clipped_buffer = NULL;
2925 gst_aggregator_pad_buffer_consumed (pad);
2926 GST_DEBUG_OBJECT (pad, "Consumed: %" GST_PTR_FORMAT, buffer);
2935 * gst_aggregator_pad_drop_buffer:
2936 * @pad: the pad where to drop any pending buffer
2938 * Drop the buffer currently queued in @pad.
2940 * Returns: TRUE if there was a buffer queued in @pad, or FALSE if not.
2943 gst_aggregator_pad_drop_buffer (GstAggregatorPad * pad)
2947 buf = gst_aggregator_pad_steal_buffer (pad);
2952 gst_buffer_unref (buf);
2957 * gst_aggregator_pad_get_buffer:
2958 * @pad: the pad to get buffer from
2960 * Returns: (transfer full): A reference to the buffer in @pad or
2961 * NULL if no buffer was queued. You should unref the buffer after
2965 gst_aggregator_pad_get_buffer (GstAggregatorPad * pad)
2971 gst_aggregator_pad_clip_buffer_unlocked (pad);
2973 if (pad->priv->clipped_buffer) {
2974 buffer = gst_buffer_ref (pad->priv->clipped_buffer);
2984 gst_aggregator_pad_is_eos (GstAggregatorPad * pad)
2989 is_eos = pad->priv->eos;
2996 * gst_aggregator_merge_tags:
2997 * @self: a #GstAggregator
2998 * @tags: a #GstTagList to merge
2999 * @mode: the #GstTagMergeMode to use
3001 * Adds tags to so-called pending tags, which will be processed
3002 * before pushing out data downstream.
3004 * Note that this is provided for convenience, and the subclass is
3005 * not required to use this and can still do tag handling on its own.
3010 gst_aggregator_merge_tags (GstAggregator * self,
3011 const GstTagList * tags, GstTagMergeMode mode)
3015 g_return_if_fail (GST_IS_AGGREGATOR (self));
3016 g_return_if_fail (tags == NULL || GST_IS_TAG_LIST (tags));
3018 /* FIXME Check if we can use OBJECT lock here! */
3019 GST_OBJECT_LOCK (self);
3021 GST_DEBUG_OBJECT (self, "merging tags %" GST_PTR_FORMAT, tags);
3022 otags = self->priv->tags;
3023 self->priv->tags = gst_tag_list_merge (self->priv->tags, tags, mode);
3025 gst_tag_list_unref (otags);
3026 self->priv->tags_changed = TRUE;
3027 GST_OBJECT_UNLOCK (self);
3031 * gst_aggregator_set_latency:
3032 * @self: a #GstAggregator
3033 * @min_latency: minimum latency
3034 * @max_latency: maximum latency
3036 * Lets #GstAggregator sub-classes tell the baseclass what their internal
3037 * latency is. Will also post a LATENCY message on the bus so the pipeline
3038 * can reconfigure its global latency.
3041 gst_aggregator_set_latency (GstAggregator * self,
3042 GstClockTime min_latency, GstClockTime max_latency)
3044 gboolean changed = FALSE;
3046 g_return_if_fail (GST_IS_AGGREGATOR (self));
3047 g_return_if_fail (GST_CLOCK_TIME_IS_VALID (min_latency));
3048 g_return_if_fail (max_latency >= min_latency);
3051 if (self->priv->sub_latency_min != min_latency) {
3052 self->priv->sub_latency_min = min_latency;
3055 if (self->priv->sub_latency_max != max_latency) {
3056 self->priv->sub_latency_max = max_latency;
3061 SRC_BROADCAST (self);
3065 gst_element_post_message (GST_ELEMENT_CAST (self),
3066 gst_message_new_latency (GST_OBJECT_CAST (self)));
3071 * gst_aggregator_get_buffer_pool:
3072 * @self: a #GstAggregator
3074 * Returns: (transfer full): the instance of the #GstBufferPool used
3075 * by @trans; free it after use it
3078 gst_aggregator_get_buffer_pool (GstAggregator * self)
3080 GstBufferPool *pool;
3082 g_return_val_if_fail (GST_IS_AGGREGATOR (self), NULL);
3084 GST_OBJECT_LOCK (self);
3085 pool = self->priv->pool;
3087 gst_object_ref (pool);
3088 GST_OBJECT_UNLOCK (self);
3094 * gst_aggregator_get_allocator:
3095 * @self: a #GstAggregator
3096 * @allocator: (out) (allow-none) (transfer full): the #GstAllocator
3098 * @params: (out) (allow-none) (transfer full): the
3099 * #GstAllocationParams of @allocator
3101 * Lets #GstAggregator sub-classes get the memory @allocator
3102 * acquired by the base class and its @params.
3104 * Unref the @allocator after use it.
3107 gst_aggregator_get_allocator (GstAggregator * self,
3108 GstAllocator ** allocator, GstAllocationParams * params)
3110 g_return_if_fail (GST_IS_AGGREGATOR (self));
3113 *allocator = self->priv->allocator ?
3114 gst_object_ref (self->priv->allocator) : NULL;
3117 *params = self->priv->allocation_params;