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: Base class for mixers and muxers, manages a set of input
26 * pads and aggregates their streams
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 * * Installs a #GstPadChainFunction, a #GstPadEventFullFunction and a
36 * #GstPadQueryFunction to queue all serialized data packets per sink pad.
37 * Subclasses should not overwrite those, but instead implement
38 * #GstAggregatorClass.sink_event() and #GstAggregatorClass.sink_query() as
41 * * When data is queued on all pads, the aggregate vmethod is called.
43 * * One can peek at the data on any given GstAggregatorPad with the
44 * gst_aggregator_pad_get_buffer () method, and take ownership of it
45 * with the gst_aggregator_pad_steal_buffer () method. When a buffer
46 * has been taken with steal_buffer (), a new buffer can be queued
49 * * If the subclass wishes to push a buffer downstream in its aggregate
50 * implementation, it should do so through the
51 * gst_aggregator_finish_buffer () method. This method will take care
52 * of sending and ordering mandatory events such as stream start, caps
55 * * Same goes for EOS events, which should not be pushed directly by the
56 * subclass, it should instead return GST_FLOW_EOS in its aggregate
59 * * Note that the aggregator logic regarding gap event handling is to turn
60 * these into gap buffers with matching PTS and duration. It will also
61 * flag these buffers with GST_BUFFER_FLAG_GAP and GST_BUFFER_FLAG_DROPPABLE
62 * to ease their identification and subsequent processing.
64 * This class used to live in gst-plugins-bad and was moved to core.
70 * SECTION: gstaggregatorpad
71 * @title: GstAggregatorPad
72 * @short_description: #GstPad subclass for pads managed by #GstAggregator
73 * @see_also: gstcollectpads for historical reasons.
75 * Pads managed by a #GstAggregor subclass.
77 * This class used to live in gst-plugins-bad and was moved to core.
86 #include <string.h> /* strlen */
88 #include "gstaggregator.h"
92 GST_AGGREGATOR_START_TIME_SELECTION_ZERO,
93 GST_AGGREGATOR_START_TIME_SELECTION_FIRST,
94 GST_AGGREGATOR_START_TIME_SELECTION_SET
95 } GstAggregatorStartTimeSelection;
98 gst_aggregator_start_time_selection_get_type (void)
100 static GType gtype = 0;
103 static const GEnumValue values[] = {
104 {GST_AGGREGATOR_START_TIME_SELECTION_ZERO,
105 "Start at 0 running time (default)", "zero"},
106 {GST_AGGREGATOR_START_TIME_SELECTION_FIRST,
107 "Start at first observed input running time", "first"},
108 {GST_AGGREGATOR_START_TIME_SELECTION_SET,
109 "Set start time with start-time property", "set"},
113 gtype = g_enum_register_static ("GstAggregatorStartTimeSelection", values);
118 /* Might become API */
120 static void gst_aggregator_merge_tags (GstAggregator * aggregator,
121 const GstTagList * tags, GstTagMergeMode mode);
123 static void gst_aggregator_set_latency_property (GstAggregator * agg,
124 GstClockTime latency);
125 static GstClockTime gst_aggregator_get_latency_property (GstAggregator * agg);
127 static GstClockTime gst_aggregator_get_latency_unlocked (GstAggregator * self);
129 GST_DEBUG_CATEGORY_STATIC (aggregator_debug);
130 #define GST_CAT_DEFAULT aggregator_debug
132 /* Locking order, locks in this element must always be taken in this order
134 * standard sink pad stream lock -> GST_PAD_STREAM_LOCK (aggpad)
135 * Aggregator pad flush lock -> PAD_FLUSH_LOCK(aggpad)
136 * standard src pad stream lock -> GST_PAD_STREAM_LOCK (srcpad)
137 * Aggregator src lock -> SRC_LOCK(agg) w/ SRC_WAIT/BROADCAST
138 * standard element object lock -> GST_OBJECT_LOCK(agg)
139 * Aggregator pad lock -> PAD_LOCK (aggpad) w/ PAD_WAIT/BROADCAST_EVENT(aggpad)
140 * standard src pad object lock -> GST_OBJECT_LOCK(srcpad)
141 * standard sink pad object lock -> GST_OBJECT_LOCK(aggpad)
144 /* GstAggregatorPad definitions */
145 #define PAD_LOCK(pad) G_STMT_START { \
146 GST_TRACE_OBJECT (pad, "Taking PAD lock from thread %p", \
148 g_mutex_lock(&pad->priv->lock); \
149 GST_TRACE_OBJECT (pad, "Took PAD lock from thread %p", \
153 #define PAD_UNLOCK(pad) G_STMT_START { \
154 GST_TRACE_OBJECT (pad, "Releasing PAD lock from thread %p", \
156 g_mutex_unlock(&pad->priv->lock); \
157 GST_TRACE_OBJECT (pad, "Release PAD lock from thread %p", \
162 #define PAD_WAIT_EVENT(pad) G_STMT_START { \
163 GST_LOG_OBJECT (pad, "Waiting for buffer to be consumed thread %p", \
165 g_cond_wait(&(((GstAggregatorPad* )pad)->priv->event_cond), \
166 (&((GstAggregatorPad*)pad)->priv->lock)); \
167 GST_LOG_OBJECT (pad, "DONE Waiting for buffer to be consumed on thread %p", \
171 #define PAD_BROADCAST_EVENT(pad) G_STMT_START { \
172 GST_LOG_OBJECT (pad, "Signaling buffer consumed from thread %p", \
174 g_cond_broadcast(&(((GstAggregatorPad* )pad)->priv->event_cond)); \
178 #define PAD_FLUSH_LOCK(pad) G_STMT_START { \
179 GST_TRACE_OBJECT (pad, "Taking lock from thread %p", \
181 g_mutex_lock(&pad->priv->flush_lock); \
182 GST_TRACE_OBJECT (pad, "Took lock from thread %p", \
186 #define PAD_FLUSH_UNLOCK(pad) G_STMT_START { \
187 GST_TRACE_OBJECT (pad, "Releasing lock from thread %p", \
189 g_mutex_unlock(&pad->priv->flush_lock); \
190 GST_TRACE_OBJECT (pad, "Release lock from thread %p", \
194 #define SRC_LOCK(self) G_STMT_START { \
195 GST_TRACE_OBJECT (self, "Taking src lock from thread %p", \
197 g_mutex_lock(&self->priv->src_lock); \
198 GST_TRACE_OBJECT (self, "Took src lock from thread %p", \
202 #define SRC_UNLOCK(self) G_STMT_START { \
203 GST_TRACE_OBJECT (self, "Releasing src lock from thread %p", \
205 g_mutex_unlock(&self->priv->src_lock); \
206 GST_TRACE_OBJECT (self, "Released src lock from thread %p", \
210 #define SRC_WAIT(self) G_STMT_START { \
211 GST_LOG_OBJECT (self, "Waiting for src on thread %p", \
213 g_cond_wait(&(self->priv->src_cond), &(self->priv->src_lock)); \
214 GST_LOG_OBJECT (self, "DONE Waiting for src on thread %p", \
218 #define SRC_BROADCAST(self) G_STMT_START { \
219 GST_LOG_OBJECT (self, "Signaling src from thread %p", \
221 if (self->priv->aggregate_id) \
222 gst_clock_id_unschedule (self->priv->aggregate_id); \
223 g_cond_broadcast(&(self->priv->src_cond)); \
226 struct _GstAggregatorPadPrivate
228 /* Following fields are protected by the PAD_LOCK */
229 GstFlowReturn flow_return;
230 gboolean pending_flush_start;
231 gboolean pending_flush_stop;
233 gboolean first_buffer;
235 GQueue data; /* buffers, events and queries */
236 GstBuffer *clipped_buffer;
239 /* used to track fill state of queues, only used with live-src and when
240 * latency property is set to > 0 */
241 GstClockTime head_position;
242 GstClockTime tail_position;
243 GstClockTime head_time; /* running time */
244 GstClockTime tail_time;
245 GstClockTime time_level; /* how much head is ahead of tail */
246 GstSegment head_segment; /* segment before the queue */
254 /* This lock prevents a flush start processing happening while
255 * the chain function is also happening.
260 /* Must be called with PAD_LOCK held */
262 gst_aggregator_pad_reset_unlocked (GstAggregatorPad * aggpad)
264 aggpad->priv->eos = FALSE;
265 aggpad->priv->flow_return = GST_FLOW_OK;
266 GST_OBJECT_LOCK (aggpad);
267 gst_segment_init (&aggpad->segment, GST_FORMAT_UNDEFINED);
268 gst_segment_init (&aggpad->priv->head_segment, GST_FORMAT_UNDEFINED);
269 GST_OBJECT_UNLOCK (aggpad);
270 aggpad->priv->head_position = GST_CLOCK_TIME_NONE;
271 aggpad->priv->tail_position = GST_CLOCK_TIME_NONE;
272 aggpad->priv->head_time = GST_CLOCK_TIME_NONE;
273 aggpad->priv->tail_time = GST_CLOCK_TIME_NONE;
274 aggpad->priv->time_level = 0;
275 aggpad->priv->first_buffer = TRUE;
279 gst_aggregator_pad_flush (GstAggregatorPad * aggpad, GstAggregator * agg)
281 GstAggregatorPadClass *klass = GST_AGGREGATOR_PAD_GET_CLASS (aggpad);
284 gst_aggregator_pad_reset_unlocked (aggpad);
288 return klass->flush (aggpad, agg);
293 /*************************************
294 * GstAggregator implementation *
295 *************************************/
296 static GstElementClass *aggregator_parent_class = NULL;
298 /* All members are protected by the object lock unless otherwise noted */
300 struct _GstAggregatorPrivate
304 /* Our state is >= PAUSED */
305 gboolean running; /* protected by src_lock */
307 /* seqnum from seek or segment,
308 * to be applied to synthetic segment/eos events */
310 gboolean send_stream_start; /* protected by srcpad stream lock */
311 gboolean send_segment;
312 gboolean flush_seeking;
313 gboolean pending_flush_start;
314 gboolean send_eos; /* protected by srcpad stream lock */
316 GstCaps *srccaps; /* protected by the srcpad stream lock */
319 gboolean tags_changed;
321 gboolean peer_latency_live; /* protected by src_lock */
322 GstClockTime peer_latency_min; /* protected by src_lock */
323 GstClockTime peer_latency_max; /* protected by src_lock */
324 gboolean has_peer_latency; /* protected by src_lock */
326 GstClockTime sub_latency_min; /* protected by src_lock */
327 GstClockTime sub_latency_max; /* protected by src_lock */
330 GstClockID aggregate_id; /* protected by src_lock */
334 gboolean first_buffer; /* protected by object lock */
335 GstAggregatorStartTimeSelection start_time_selection;
336 GstClockTime start_time;
338 /* protected by the object lock */
339 GstQuery *allocation_query;
340 GstAllocator *allocator;
342 GstAllocationParams allocation_params;
345 gint64 latency; /* protected by both src_lock and all pad locks */
348 /* Seek event forwarding helper */
354 gboolean only_to_active_pads;
358 gboolean one_actually_seeked;
361 #define DEFAULT_LATENCY 0
362 #define DEFAULT_START_TIME_SELECTION GST_AGGREGATOR_START_TIME_SELECTION_ZERO
363 #define DEFAULT_START_TIME (-1)
369 PROP_START_TIME_SELECTION,
374 static GstFlowReturn gst_aggregator_pad_chain_internal (GstAggregator * self,
375 GstAggregatorPad * aggpad, GstBuffer * buffer, gboolean head);
378 gst_aggregator_pad_queue_is_empty (GstAggregatorPad * pad)
380 return (g_queue_peek_tail (&pad->priv->data) == NULL &&
381 pad->priv->clipped_buffer == NULL);
385 gst_aggregator_check_pads_ready (GstAggregator * self)
387 GstAggregatorPad *pad;
389 gboolean have_buffer = TRUE;
390 gboolean have_event_or_query = FALSE;
392 GST_LOG_OBJECT (self, "checking pads");
394 GST_OBJECT_LOCK (self);
396 sinkpads = GST_ELEMENT_CAST (self)->sinkpads;
397 if (sinkpads == NULL)
400 for (l = sinkpads; l != NULL; l = l->next) {
405 if (pad->priv->num_buffers == 0) {
406 if (!gst_aggregator_pad_queue_is_empty (pad))
407 have_event_or_query = TRUE;
408 if (!pad->priv->eos) {
411 /* If not live we need data on all pads, so leave the loop */
412 if (!self->priv->peer_latency_live) {
417 } else if (self->priv->peer_latency_live) {
418 /* In live mode, having a single pad with buffers is enough to
419 * generate a start time from it. In non-live mode all pads need
422 self->priv->first_buffer = FALSE;
428 if (!have_buffer && !have_event_or_query)
432 self->priv->first_buffer = FALSE;
434 GST_OBJECT_UNLOCK (self);
435 GST_LOG_OBJECT (self, "pads are ready");
440 GST_LOG_OBJECT (self, "pads not ready: no sink pads");
441 GST_OBJECT_UNLOCK (self);
446 if (have_event_or_query)
447 GST_LOG_OBJECT (pad, "pad not ready to be aggregated yet,"
448 " but waking up for serialized event");
450 GST_LOG_OBJECT (pad, "pad not ready to be aggregated yet");
451 GST_OBJECT_UNLOCK (self);
452 return have_event_or_query;
457 gst_aggregator_reset_flow_values (GstAggregator * self)
459 GST_OBJECT_LOCK (self);
460 self->priv->send_stream_start = TRUE;
461 self->priv->send_segment = TRUE;
462 gst_segment_init (&self->segment, GST_FORMAT_TIME);
463 self->priv->first_buffer = TRUE;
464 GST_OBJECT_UNLOCK (self);
468 gst_aggregator_push_mandatory_events (GstAggregator * self)
470 GstAggregatorPrivate *priv = self->priv;
471 GstEvent *segment = NULL;
472 GstEvent *tags = NULL;
474 if (self->priv->send_stream_start) {
477 GST_INFO_OBJECT (self, "pushing stream start");
478 /* stream-start (FIXME: create id based on input ids) */
479 g_snprintf (s_id, sizeof (s_id), "agg-%08x", g_random_int ());
480 if (!gst_pad_push_event (self->srcpad, gst_event_new_stream_start (s_id))) {
481 GST_WARNING_OBJECT (self->srcpad, "Sending stream start event failed");
483 self->priv->send_stream_start = FALSE;
486 if (self->priv->srccaps) {
488 GST_INFO_OBJECT (self, "pushing caps: %" GST_PTR_FORMAT,
489 self->priv->srccaps);
490 if (!gst_pad_push_event (self->srcpad,
491 gst_event_new_caps (self->priv->srccaps))) {
492 GST_WARNING_OBJECT (self->srcpad, "Sending caps event failed");
494 gst_caps_unref (self->priv->srccaps);
495 self->priv->srccaps = NULL;
498 GST_OBJECT_LOCK (self);
499 if (self->priv->send_segment && !self->priv->flush_seeking) {
500 segment = gst_event_new_segment (&self->segment);
502 if (!self->priv->seqnum)
503 /* This code-path is in preparation to be able to run without a source
504 * connected. Then we won't have a seq-num from a segment event. */
505 self->priv->seqnum = gst_event_get_seqnum (segment);
507 gst_event_set_seqnum (segment, self->priv->seqnum);
508 self->priv->send_segment = FALSE;
510 GST_DEBUG_OBJECT (self, "pushing segment %" GST_PTR_FORMAT, segment);
513 if (priv->tags && priv->tags_changed && !self->priv->flush_seeking) {
514 tags = gst_event_new_tag (gst_tag_list_ref (priv->tags));
515 priv->tags_changed = FALSE;
517 GST_OBJECT_UNLOCK (self);
520 gst_pad_push_event (self->srcpad, segment);
522 gst_pad_push_event (self->srcpad, tags);
527 * gst_aggregator_set_src_caps:
528 * @self: The #GstAggregator
529 * @caps: The #GstCaps to set on the src pad.
531 * Sets the caps to be used on the src pad.
534 gst_aggregator_set_src_caps (GstAggregator * self, GstCaps * caps)
536 GST_PAD_STREAM_LOCK (self->srcpad);
537 gst_caps_replace (&self->priv->srccaps, caps);
538 gst_aggregator_push_mandatory_events (self);
539 GST_PAD_STREAM_UNLOCK (self->srcpad);
543 * gst_aggregator_finish_buffer:
544 * @self: The #GstAggregator
545 * @buffer: (transfer full): the #GstBuffer to push.
547 * This method will push the provided output buffer downstream. If needed,
548 * mandatory events such as stream-start, caps, and segment events will be
549 * sent before pushing the buffer.
552 gst_aggregator_finish_buffer (GstAggregator * self, GstBuffer * buffer)
554 gst_aggregator_push_mandatory_events (self);
556 GST_OBJECT_LOCK (self);
557 if (!self->priv->flush_seeking && gst_pad_is_active (self->srcpad)) {
558 GST_TRACE_OBJECT (self, "pushing buffer %" GST_PTR_FORMAT, buffer);
559 GST_OBJECT_UNLOCK (self);
560 return gst_pad_push (self->srcpad, buffer);
562 GST_INFO_OBJECT (self, "Not pushing (active: %i, flushing: %i)",
563 self->priv->flush_seeking, gst_pad_is_active (self->srcpad));
564 GST_OBJECT_UNLOCK (self);
565 gst_buffer_unref (buffer);
571 gst_aggregator_push_eos (GstAggregator * self)
574 gst_aggregator_push_mandatory_events (self);
576 event = gst_event_new_eos ();
578 GST_OBJECT_LOCK (self);
579 self->priv->send_eos = FALSE;
580 gst_event_set_seqnum (event, self->priv->seqnum);
581 GST_OBJECT_UNLOCK (self);
583 gst_pad_push_event (self->srcpad, event);
587 gst_aggregator_get_next_time (GstAggregator * self)
589 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
591 if (klass->get_next_time)
592 return klass->get_next_time (self);
594 return GST_CLOCK_TIME_NONE;
598 gst_aggregator_wait_and_check (GstAggregator * self, gboolean * timeout)
600 GstClockTime latency;
608 latency = gst_aggregator_get_latency_unlocked (self);
610 if (gst_aggregator_check_pads_ready (self)) {
611 GST_DEBUG_OBJECT (self, "all pads have data");
617 /* Before waiting, check if we're actually still running */
618 if (!self->priv->running || !self->priv->send_eos) {
624 start = gst_aggregator_get_next_time (self);
626 /* If we're not live, or if we use the running time
627 * of the first buffer as start time, we wait until
628 * all pads have buffers.
629 * Otherwise (i.e. if we are live!), we wait on the clock
630 * and if a pad does not have a buffer in time we ignore
633 GST_OBJECT_LOCK (self);
634 if (!GST_CLOCK_TIME_IS_VALID (latency) ||
635 !GST_IS_CLOCK (GST_ELEMENT_CLOCK (self)) ||
636 !GST_CLOCK_TIME_IS_VALID (start) ||
637 (self->priv->first_buffer
638 && self->priv->start_time_selection ==
639 GST_AGGREGATOR_START_TIME_SELECTION_FIRST)) {
640 /* We wake up here when something happened, and below
641 * then check if we're ready now. If we return FALSE,
642 * we will be directly called again.
644 GST_OBJECT_UNLOCK (self);
647 GstClockTime base_time, time;
649 GstClockReturn status;
650 GstClockTimeDiff jitter;
652 GST_DEBUG_OBJECT (self, "got subclass start time: %" GST_TIME_FORMAT,
653 GST_TIME_ARGS (start));
655 base_time = GST_ELEMENT_CAST (self)->base_time;
656 clock = gst_object_ref (GST_ELEMENT_CLOCK (self));
657 GST_OBJECT_UNLOCK (self);
659 time = base_time + start;
662 GST_DEBUG_OBJECT (self, "possibly waiting for clock to reach %"
663 GST_TIME_FORMAT " (base %" GST_TIME_FORMAT " start %" GST_TIME_FORMAT
664 " latency %" GST_TIME_FORMAT " current %" GST_TIME_FORMAT ")",
665 GST_TIME_ARGS (time),
666 GST_TIME_ARGS (base_time),
667 GST_TIME_ARGS (start), GST_TIME_ARGS (latency),
668 GST_TIME_ARGS (gst_clock_get_time (clock)));
670 self->priv->aggregate_id = gst_clock_new_single_shot_id (clock, time);
671 gst_object_unref (clock);
675 status = gst_clock_id_wait (self->priv->aggregate_id, &jitter);
678 if (self->priv->aggregate_id) {
679 gst_clock_id_unref (self->priv->aggregate_id);
680 self->priv->aggregate_id = NULL;
683 GST_DEBUG_OBJECT (self,
684 "clock returned %d (jitter: %" GST_STIME_FORMAT ")",
685 status, GST_STIME_ARGS (jitter));
688 if (status == GST_CLOCK_OK || status == GST_CLOCK_EARLY) {
695 res = gst_aggregator_check_pads_ready (self);
702 gst_aggregator_do_events_and_queries (GstElement * self, GstPad * epad,
705 GstAggregatorPad *pad = GST_AGGREGATOR_PAD_CAST (epad);
706 GstAggregator *aggregator = GST_AGGREGATOR_CAST (self);
707 GstEvent *event = NULL;
708 GstQuery *query = NULL;
709 GstAggregatorClass *klass = NULL;
710 gboolean *processed_event = user_data;
717 if (pad->priv->clipped_buffer == NULL &&
718 !GST_IS_BUFFER (g_queue_peek_tail (&pad->priv->data))) {
719 if (GST_IS_EVENT (g_queue_peek_tail (&pad->priv->data)))
720 event = gst_event_ref (g_queue_peek_tail (&pad->priv->data));
721 if (GST_IS_QUERY (g_queue_peek_tail (&pad->priv->data)))
722 query = g_queue_peek_tail (&pad->priv->data);
725 if (event || query) {
729 *processed_event = TRUE;
731 klass = GST_AGGREGATOR_GET_CLASS (self);
734 GST_LOG_OBJECT (pad, "Processing %" GST_PTR_FORMAT, event);
735 gst_event_ref (event);
736 ret = klass->sink_event (aggregator, pad, event);
739 if (GST_EVENT_TYPE (event) == GST_EVENT_CAPS)
740 pad->priv->negotiated = ret;
741 if (g_queue_peek_tail (&pad->priv->data) == event)
742 gst_event_unref (g_queue_pop_tail (&pad->priv->data));
743 gst_event_unref (event);
745 GST_LOG_OBJECT (pad, "Processing %" GST_PTR_FORMAT, query);
746 ret = klass->sink_query (aggregator, pad, query);
749 if (g_queue_peek_tail (&pad->priv->data) == query) {
752 s = gst_query_writable_structure (query);
753 gst_structure_set (s, "gst-aggregator-retval", G_TYPE_BOOLEAN, ret,
755 g_queue_pop_tail (&pad->priv->data);
759 PAD_BROADCAST_EVENT (pad);
762 } while (event || query);
768 gst_aggregator_pad_set_flushing (GstAggregatorPad * aggpad,
769 GstFlowReturn flow_return, gboolean full)
774 if (flow_return == GST_FLOW_NOT_LINKED)
775 aggpad->priv->flow_return = MIN (flow_return, aggpad->priv->flow_return);
777 aggpad->priv->flow_return = flow_return;
779 item = g_queue_peek_head_link (&aggpad->priv->data);
781 GList *next = item->next;
783 /* In partial flush, we do like the pad, we get rid of non-sticky events
786 if (full || GST_IS_BUFFER (item->data) ||
787 GST_EVENT_TYPE (item->data) == GST_EVENT_EOS ||
788 GST_EVENT_TYPE (item->data) == GST_EVENT_SEGMENT ||
789 !GST_EVENT_IS_STICKY (item->data)) {
790 if (!GST_IS_QUERY (item->data))
791 gst_mini_object_unref (item->data);
792 g_queue_delete_link (&aggpad->priv->data, item);
796 aggpad->priv->num_buffers = 0;
797 gst_buffer_replace (&aggpad->priv->clipped_buffer, NULL);
799 PAD_BROADCAST_EVENT (aggpad);
804 gst_aggregator_default_update_src_caps (GstAggregator * agg, GstCaps * caps,
807 *ret = gst_caps_ref (caps);
813 gst_aggregator_default_fixate_src_caps (GstAggregator * agg, GstCaps * caps)
815 caps = gst_caps_fixate (caps);
821 gst_aggregator_default_negotiated_src_caps (GstAggregator * agg, GstCaps * caps)
827 /* takes ownership of the pool, allocator and query */
829 gst_aggregator_set_allocation (GstAggregator * self,
830 GstBufferPool * pool, GstAllocator * allocator,
831 GstAllocationParams * params, GstQuery * query)
833 GstAllocator *oldalloc;
834 GstBufferPool *oldpool;
837 GST_DEBUG ("storing allocation query");
839 GST_OBJECT_LOCK (self);
840 oldpool = self->priv->pool;
841 self->priv->pool = pool;
843 oldalloc = self->priv->allocator;
844 self->priv->allocator = allocator;
846 oldquery = self->priv->allocation_query;
847 self->priv->allocation_query = query;
850 self->priv->allocation_params = *params;
852 gst_allocation_params_init (&self->priv->allocation_params);
853 GST_OBJECT_UNLOCK (self);
856 GST_DEBUG_OBJECT (self, "deactivating old pool %p", oldpool);
857 gst_buffer_pool_set_active (oldpool, FALSE);
858 gst_object_unref (oldpool);
861 gst_object_unref (oldalloc);
864 gst_query_unref (oldquery);
871 gst_aggregator_decide_allocation (GstAggregator * self, GstQuery * query)
873 GstAggregatorClass *aggclass = GST_AGGREGATOR_GET_CLASS (self);
875 if (aggclass->decide_allocation)
876 if (!aggclass->decide_allocation (self, query))
883 gst_aggregator_do_allocation (GstAggregator * self, GstCaps * caps)
886 gboolean result = TRUE;
887 GstBufferPool *pool = NULL;
888 GstAllocator *allocator;
889 GstAllocationParams params;
891 /* find a pool for the negotiated caps now */
892 GST_DEBUG_OBJECT (self, "doing allocation query");
893 query = gst_query_new_allocation (caps, TRUE);
894 if (!gst_pad_peer_query (self->srcpad, query)) {
895 /* not a problem, just debug a little */
896 GST_DEBUG_OBJECT (self, "peer ALLOCATION query failed");
899 GST_DEBUG_OBJECT (self, "calling decide_allocation");
900 result = gst_aggregator_decide_allocation (self, query);
902 GST_DEBUG_OBJECT (self, "ALLOCATION (%d) params: %" GST_PTR_FORMAT, result,
906 goto no_decide_allocation;
908 /* we got configuration from our peer or the decide_allocation method,
910 if (gst_query_get_n_allocation_params (query) > 0) {
911 gst_query_parse_nth_allocation_param (query, 0, &allocator, ¶ms);
914 gst_allocation_params_init (¶ms);
917 if (gst_query_get_n_allocation_pools (query) > 0)
918 gst_query_parse_nth_allocation_pool (query, 0, &pool, NULL, NULL, NULL);
922 gst_aggregator_set_allocation (self, pool, allocator, ¶ms, query);
927 no_decide_allocation:
929 GST_WARNING_OBJECT (self, "Failed to decide allocation");
930 gst_query_unref (query);
937 /* WITH SRC_LOCK held */
939 gst_aggregator_update_src_caps (GstAggregator * self)
941 GstAggregatorClass *agg_klass = GST_AGGREGATOR_GET_CLASS (self);
942 GstCaps *downstream_caps, *template_caps, *caps = NULL;
943 GstFlowReturn ret = GST_FLOW_OK;
945 template_caps = gst_pad_get_pad_template_caps (self->srcpad);
946 downstream_caps = gst_pad_peer_query_caps (self->srcpad, template_caps);
948 if (gst_caps_is_empty (downstream_caps)) {
949 GST_INFO_OBJECT (self, "Downstream caps (%"
950 GST_PTR_FORMAT ") not compatible with pad template caps (%"
951 GST_PTR_FORMAT ")", downstream_caps, template_caps);
952 ret = GST_FLOW_NOT_NEGOTIATED;
956 g_assert (agg_klass->update_src_caps);
957 GST_DEBUG_OBJECT (self, "updating caps from %" GST_PTR_FORMAT,
959 ret = agg_klass->update_src_caps (self, downstream_caps, &caps);
960 if (ret < GST_FLOW_OK) {
961 GST_WARNING_OBJECT (self, "Subclass failed to update provided caps");
964 if ((caps == NULL || gst_caps_is_empty (caps)) && ret >= GST_FLOW_OK) {
965 ret = GST_FLOW_NOT_NEGOTIATED;
968 GST_DEBUG_OBJECT (self, " to %" GST_PTR_FORMAT, caps);
970 #ifdef GST_ENABLE_EXTRA_CHECKS
971 if (!gst_caps_is_subset (caps, template_caps)) {
972 GstCaps *intersection;
974 GST_ERROR_OBJECT (self,
975 "update_src_caps returned caps %" GST_PTR_FORMAT
976 " which are not a real subset of the template caps %"
977 GST_PTR_FORMAT, caps, template_caps);
978 g_warning ("%s: update_src_caps returned caps which are not a real "
979 "subset of the filter caps", GST_ELEMENT_NAME (self));
982 gst_caps_intersect_full (template_caps, caps, GST_CAPS_INTERSECT_FIRST);
983 gst_caps_unref (caps);
988 if (gst_caps_is_any (caps)) {
992 if (!gst_caps_is_fixed (caps)) {
993 g_assert (agg_klass->fixate_src_caps);
995 GST_DEBUG_OBJECT (self, "fixate caps from %" GST_PTR_FORMAT, caps);
996 if (!(caps = agg_klass->fixate_src_caps (self, caps))) {
997 GST_WARNING_OBJECT (self, "Subclass failed to fixate provided caps");
998 ret = GST_FLOW_NOT_NEGOTIATED;
1001 GST_DEBUG_OBJECT (self, " to %" GST_PTR_FORMAT, caps);
1004 if (agg_klass->negotiated_src_caps) {
1005 if (!agg_klass->negotiated_src_caps (self, caps)) {
1006 GST_WARNING_OBJECT (self, "Subclass failed to accept negotiated caps");
1007 ret = GST_FLOW_NOT_NEGOTIATED;
1012 gst_aggregator_set_src_caps (self, caps);
1014 if (!gst_aggregator_do_allocation (self, caps)) {
1015 GST_WARNING_OBJECT (self, "Allocation negotiation failed");
1016 ret = GST_FLOW_NOT_NEGOTIATED;
1020 gst_caps_unref (downstream_caps);
1021 gst_caps_unref (template_caps);
1024 gst_caps_unref (caps);
1030 gst_aggregator_aggregate_func (GstAggregator * self)
1032 GstAggregatorPrivate *priv = self->priv;
1033 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
1034 gboolean timeout = FALSE;
1036 if (self->priv->running == FALSE) {
1037 GST_DEBUG_OBJECT (self, "Not running anymore");
1041 GST_LOG_OBJECT (self, "Checking aggregate");
1042 while (priv->send_eos && priv->running) {
1043 GstFlowReturn flow_return = GST_FLOW_OK;
1044 gboolean processed_event = FALSE;
1046 gst_element_foreach_sink_pad (GST_ELEMENT_CAST (self),
1047 gst_aggregator_do_events_and_queries, NULL);
1049 /* Ensure we have buffers ready (either in clipped_buffer or at the head of
1051 if (!gst_aggregator_wait_and_check (self, &timeout))
1054 gst_element_foreach_sink_pad (GST_ELEMENT_CAST (self),
1055 gst_aggregator_do_events_and_queries, &processed_event);
1057 if (processed_event)
1060 if (gst_pad_check_reconfigure (GST_AGGREGATOR_SRC_PAD (self))) {
1061 flow_return = gst_aggregator_update_src_caps (self);
1062 if (flow_return != GST_FLOW_OK)
1063 gst_pad_mark_reconfigure (GST_AGGREGATOR_SRC_PAD (self));
1066 if (timeout || flow_return >= GST_FLOW_OK) {
1067 GST_TRACE_OBJECT (self, "Actually aggregating!");
1068 flow_return = klass->aggregate (self, timeout);
1071 if (flow_return == GST_AGGREGATOR_FLOW_NEED_DATA)
1074 GST_OBJECT_LOCK (self);
1075 if (flow_return == GST_FLOW_FLUSHING && priv->flush_seeking) {
1076 /* We don't want to set the pads to flushing, but we want to
1077 * stop the thread, so just break here */
1078 GST_OBJECT_UNLOCK (self);
1081 GST_OBJECT_UNLOCK (self);
1083 if (flow_return == GST_FLOW_EOS || flow_return == GST_FLOW_ERROR) {
1084 gst_aggregator_push_eos (self);
1087 GST_LOG_OBJECT (self, "flow return is %s", gst_flow_get_name (flow_return));
1089 if (flow_return != GST_FLOW_OK) {
1092 GST_OBJECT_LOCK (self);
1093 for (item = GST_ELEMENT (self)->sinkpads; item; item = item->next) {
1094 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (item->data);
1096 gst_aggregator_pad_set_flushing (aggpad, flow_return, TRUE);
1098 GST_OBJECT_UNLOCK (self);
1103 /* Pause the task here, the only ways to get here are:
1104 * 1) We're stopping, in which case the task is stopped anyway
1105 * 2) We got a flow error above, in which case it might take
1106 * some time to forward the flow return upstream and we
1107 * would otherwise call the task function over and over
1108 * again without doing anything
1110 gst_pad_pause_task (self->srcpad);
1114 gst_aggregator_start (GstAggregator * self)
1116 GstAggregatorClass *klass;
1119 self->priv->send_stream_start = TRUE;
1120 self->priv->send_segment = TRUE;
1121 self->priv->send_eos = TRUE;
1122 self->priv->srccaps = NULL;
1124 gst_aggregator_set_allocation (self, NULL, NULL, NULL, NULL);
1126 klass = GST_AGGREGATOR_GET_CLASS (self);
1129 result = klass->start (self);
1137 _check_pending_flush_stop (GstAggregatorPad * pad)
1142 res = (!pad->priv->pending_flush_stop && !pad->priv->pending_flush_start);
1149 gst_aggregator_stop_srcpad_task (GstAggregator * self, GstEvent * flush_start)
1151 gboolean res = TRUE;
1153 GST_INFO_OBJECT (self, "%s srcpad task",
1154 flush_start ? "Pausing" : "Stopping");
1157 self->priv->running = FALSE;
1158 SRC_BROADCAST (self);
1162 res = gst_pad_push_event (self->srcpad, flush_start);
1165 gst_pad_stop_task (self->srcpad);
1171 gst_aggregator_start_srcpad_task (GstAggregator * self)
1173 GST_INFO_OBJECT (self, "Starting srcpad task");
1175 self->priv->running = TRUE;
1176 gst_pad_start_task (GST_PAD (self->srcpad),
1177 (GstTaskFunction) gst_aggregator_aggregate_func, self, NULL);
1180 static GstFlowReturn
1181 gst_aggregator_flush (GstAggregator * self)
1183 GstFlowReturn ret = GST_FLOW_OK;
1184 GstAggregatorPrivate *priv = self->priv;
1185 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (self);
1187 GST_DEBUG_OBJECT (self, "Flushing everything");
1188 GST_OBJECT_LOCK (self);
1189 priv->send_segment = TRUE;
1190 priv->flush_seeking = FALSE;
1191 priv->tags_changed = FALSE;
1192 GST_OBJECT_UNLOCK (self);
1194 ret = klass->flush (self);
1200 /* Called with GstAggregator's object lock held */
1203 gst_aggregator_all_flush_stop_received_locked (GstAggregator * self)
1206 GstAggregatorPad *tmppad;
1208 for (tmp = GST_ELEMENT (self)->sinkpads; tmp; tmp = tmp->next) {
1209 tmppad = (GstAggregatorPad *) tmp->data;
1211 if (_check_pending_flush_stop (tmppad) == FALSE) {
1212 GST_DEBUG_OBJECT (tmppad, "Is not last %i -- %i",
1213 tmppad->priv->pending_flush_start, tmppad->priv->pending_flush_stop);
1222 gst_aggregator_flush_start (GstAggregator * self, GstAggregatorPad * aggpad,
1225 GstAggregatorPrivate *priv = self->priv;
1226 GstAggregatorPadPrivate *padpriv = aggpad->priv;
1228 gst_aggregator_pad_set_flushing (aggpad, GST_FLOW_FLUSHING, FALSE);
1230 PAD_FLUSH_LOCK (aggpad);
1232 if (padpriv->pending_flush_start) {
1233 GST_DEBUG_OBJECT (aggpad, "Expecting FLUSH_STOP now");
1235 padpriv->pending_flush_start = FALSE;
1236 padpriv->pending_flush_stop = TRUE;
1238 PAD_UNLOCK (aggpad);
1240 GST_OBJECT_LOCK (self);
1241 if (priv->flush_seeking) {
1242 /* If flush_seeking we forward the first FLUSH_START */
1243 if (priv->pending_flush_start) {
1244 priv->pending_flush_start = FALSE;
1245 GST_OBJECT_UNLOCK (self);
1247 GST_INFO_OBJECT (self, "Flushing, pausing srcpad task");
1248 gst_aggregator_stop_srcpad_task (self, event);
1250 GST_INFO_OBJECT (self, "Getting STREAM_LOCK while seeking");
1251 GST_PAD_STREAM_LOCK (self->srcpad);
1252 GST_LOG_OBJECT (self, "GOT STREAM_LOCK");
1255 GST_OBJECT_UNLOCK (self);
1256 gst_event_unref (event);
1259 GST_OBJECT_UNLOCK (self);
1260 gst_event_unref (event);
1262 PAD_FLUSH_UNLOCK (aggpad);
1265 /* Must be called with the the PAD_LOCK held */
1267 update_time_level (GstAggregatorPad * aggpad, gboolean head)
1269 GstAggregatorPadPrivate *priv = aggpad->priv;
1272 if (GST_CLOCK_TIME_IS_VALID (priv->head_position) &&
1273 priv->head_segment.format == GST_FORMAT_TIME)
1274 priv->head_time = gst_segment_to_running_time (&priv->head_segment,
1275 GST_FORMAT_TIME, priv->head_position);
1277 priv->head_time = GST_CLOCK_TIME_NONE;
1279 if (!GST_CLOCK_TIME_IS_VALID (priv->tail_time))
1280 priv->tail_time = priv->head_time;
1282 if (GST_CLOCK_TIME_IS_VALID (priv->tail_position) &&
1283 aggpad->segment.format == GST_FORMAT_TIME)
1284 priv->tail_time = gst_segment_to_running_time (&aggpad->segment,
1285 GST_FORMAT_TIME, priv->tail_position);
1287 priv->tail_time = priv->head_time;
1290 if (priv->head_time == GST_CLOCK_TIME_NONE ||
1291 priv->tail_time == GST_CLOCK_TIME_NONE) {
1292 priv->time_level = 0;
1296 if (priv->tail_time > priv->head_time)
1297 priv->time_level = 0;
1299 priv->time_level = priv->head_time - priv->tail_time;
1303 /* GstAggregator vmethods default implementations */
1305 gst_aggregator_default_sink_event (GstAggregator * self,
1306 GstAggregatorPad * aggpad, GstEvent * event)
1308 gboolean res = TRUE;
1309 GstPad *pad = GST_PAD (aggpad);
1310 GstAggregatorPrivate *priv = self->priv;
1312 GST_DEBUG_OBJECT (aggpad, "Got event: %" GST_PTR_FORMAT, event);
1314 switch (GST_EVENT_TYPE (event)) {
1315 case GST_EVENT_FLUSH_START:
1317 gst_aggregator_flush_start (self, aggpad, event);
1318 /* We forward only in one case: right after flush_seeking */
1322 case GST_EVENT_FLUSH_STOP:
1324 gst_aggregator_pad_flush (aggpad, self);
1325 GST_OBJECT_LOCK (self);
1326 if (priv->flush_seeking) {
1327 g_atomic_int_set (&aggpad->priv->pending_flush_stop, FALSE);
1328 if (gst_aggregator_all_flush_stop_received_locked (self)) {
1329 GST_OBJECT_UNLOCK (self);
1330 /* That means we received FLUSH_STOP/FLUSH_STOP on
1331 * all sinkpads -- Seeking is Done... sending FLUSH_STOP */
1332 gst_aggregator_flush (self);
1333 gst_pad_push_event (self->srcpad, event);
1336 priv->send_eos = TRUE;
1337 SRC_BROADCAST (self);
1340 GST_INFO_OBJECT (self, "Releasing source pad STREAM_LOCK");
1341 GST_PAD_STREAM_UNLOCK (self->srcpad);
1342 gst_aggregator_start_srcpad_task (self);
1344 GST_OBJECT_UNLOCK (self);
1347 GST_OBJECT_UNLOCK (self);
1350 /* We never forward the event */
1357 g_assert (aggpad->priv->num_buffers == 0);
1358 aggpad->priv->eos = TRUE;
1359 PAD_UNLOCK (aggpad);
1360 SRC_BROADCAST (self);
1364 case GST_EVENT_SEGMENT:
1367 GST_OBJECT_LOCK (aggpad);
1368 gst_event_copy_segment (event, &aggpad->segment);
1369 /* We've got a new segment, tail_position is now meaningless
1370 * and may interfere with the time_level calculation
1372 aggpad->priv->tail_position = GST_CLOCK_TIME_NONE;
1373 update_time_level (aggpad, FALSE);
1374 GST_OBJECT_UNLOCK (aggpad);
1375 PAD_UNLOCK (aggpad);
1377 GST_OBJECT_LOCK (self);
1378 self->priv->seqnum = gst_event_get_seqnum (event);
1379 GST_OBJECT_UNLOCK (self);
1382 case GST_EVENT_STREAM_START:
1388 GstClockTime pts, endpts;
1389 GstClockTime duration;
1392 gst_event_parse_gap (event, &pts, &duration);
1393 gapbuf = gst_buffer_new ();
1395 if (GST_CLOCK_TIME_IS_VALID (duration))
1396 endpts = pts + duration;
1398 endpts = GST_CLOCK_TIME_NONE;
1400 GST_OBJECT_LOCK (aggpad);
1401 res = gst_segment_clip (&aggpad->segment, GST_FORMAT_TIME, pts, endpts,
1403 GST_OBJECT_UNLOCK (aggpad);
1406 GST_WARNING_OBJECT (self, "GAP event outside segment, dropping");
1410 if (GST_CLOCK_TIME_IS_VALID (endpts) && GST_CLOCK_TIME_IS_VALID (pts))
1411 duration = endpts - pts;
1413 duration = GST_CLOCK_TIME_NONE;
1415 GST_BUFFER_PTS (gapbuf) = pts;
1416 GST_BUFFER_DURATION (gapbuf) = duration;
1417 GST_BUFFER_FLAG_SET (gapbuf, GST_BUFFER_FLAG_GAP);
1418 GST_BUFFER_FLAG_SET (gapbuf, GST_BUFFER_FLAG_DROPPABLE);
1420 /* Remove GAP event so we can replace it with the buffer */
1421 if (g_queue_peek_tail (&aggpad->priv->data) == event)
1422 gst_event_unref (g_queue_pop_tail (&aggpad->priv->data));
1424 if (gst_aggregator_pad_chain_internal (self, aggpad, gapbuf, FALSE) !=
1426 GST_WARNING_OBJECT (self, "Failed to chain gap buffer");
1440 GST_DEBUG_OBJECT (pad, "Forwarding event: %" GST_PTR_FORMAT, event);
1441 return gst_pad_event_default (pad, GST_OBJECT (self), event);
1444 GST_DEBUG_OBJECT (pad, "Eating event: %" GST_PTR_FORMAT, event);
1446 gst_event_unref (event);
1452 gst_aggregator_stop_pad (GstElement * self, GstPad * epad, gpointer user_data)
1454 GstAggregatorPad *pad = GST_AGGREGATOR_PAD_CAST (epad);
1455 GstAggregator *agg = GST_AGGREGATOR_CAST (self);
1457 gst_aggregator_pad_flush (pad, agg);
1460 pad->priv->flow_return = GST_FLOW_FLUSHING;
1461 pad->priv->negotiated = FALSE;
1462 PAD_BROADCAST_EVENT (pad);
1469 gst_aggregator_stop (GstAggregator * agg)
1471 GstAggregatorClass *klass;
1474 gst_aggregator_reset_flow_values (agg);
1476 /* Application needs to make sure no pads are added while it shuts us down */
1477 gst_element_foreach_sink_pad (GST_ELEMENT_CAST (agg),
1478 gst_aggregator_stop_pad, NULL);
1480 klass = GST_AGGREGATOR_GET_CLASS (agg);
1483 result = klass->stop (agg);
1487 agg->priv->has_peer_latency = FALSE;
1488 agg->priv->peer_latency_live = FALSE;
1489 agg->priv->peer_latency_min = agg->priv->peer_latency_max = 0;
1491 if (agg->priv->tags)
1492 gst_tag_list_unref (agg->priv->tags);
1493 agg->priv->tags = NULL;
1495 gst_aggregator_set_allocation (agg, NULL, NULL, NULL, NULL);
1500 /* GstElement vmethods implementations */
1501 static GstStateChangeReturn
1502 gst_aggregator_change_state (GstElement * element, GstStateChange transition)
1504 GstStateChangeReturn ret;
1505 GstAggregator *self = GST_AGGREGATOR (element);
1507 switch (transition) {
1508 case GST_STATE_CHANGE_READY_TO_PAUSED:
1509 if (!gst_aggregator_start (self))
1517 GST_ELEMENT_CLASS (aggregator_parent_class)->change_state (element,
1518 transition)) == GST_STATE_CHANGE_FAILURE)
1522 switch (transition) {
1523 case GST_STATE_CHANGE_PAUSED_TO_READY:
1524 if (!gst_aggregator_stop (self)) {
1525 /* What to do in this case? Error out? */
1526 GST_ERROR_OBJECT (self, "Subclass failed to stop.");
1538 GST_ERROR_OBJECT (element, "parent failed state change");
1543 GST_ERROR_OBJECT (element, "Subclass failed to start");
1544 return GST_STATE_CHANGE_FAILURE;
1549 gst_aggregator_release_pad (GstElement * element, GstPad * pad)
1551 GstAggregator *self = GST_AGGREGATOR (element);
1552 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
1554 GST_INFO_OBJECT (pad, "Removing pad");
1557 gst_aggregator_pad_set_flushing (aggpad, GST_FLOW_FLUSHING, TRUE);
1558 gst_element_remove_pad (element, pad);
1560 self->priv->has_peer_latency = FALSE;
1561 SRC_BROADCAST (self);
1565 static GstAggregatorPad *
1566 gst_aggregator_default_create_new_pad (GstAggregator * self,
1567 GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
1569 GstAggregatorPad *agg_pad;
1570 GstAggregatorPrivate *priv = self->priv;
1574 GST_PAD_TEMPLATE_GTYPE (templ) ==
1575 G_TYPE_NONE ? GST_TYPE_AGGREGATOR_PAD : GST_PAD_TEMPLATE_GTYPE (templ);
1577 if (templ->direction != GST_PAD_SINK)
1580 if (templ->presence != GST_PAD_REQUEST)
1583 GST_OBJECT_LOCK (self);
1584 if (req_name == NULL || strlen (req_name) < 6
1585 || !g_str_has_prefix (req_name, "sink_")) {
1586 /* no name given when requesting the pad, use next available int */
1587 serial = ++priv->max_padserial;
1589 /* parse serial number from requested padname */
1590 serial = g_ascii_strtoull (&req_name[5], NULL, 10);
1591 if (serial > priv->max_padserial)
1592 priv->max_padserial = serial;
1595 name = g_strdup_printf ("sink_%u", serial);
1596 agg_pad = g_object_new (pad_type,
1597 "name", name, "direction", GST_PAD_SINK, "template", templ, NULL);
1600 GST_OBJECT_UNLOCK (self);
1607 GST_WARNING_OBJECT (self, "request new pad that is not a SINK pad");
1612 GST_WARNING_OBJECT (self, "request new pad that is not a REQUEST pad");
1618 gst_aggregator_request_new_pad (GstElement * element,
1619 GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
1621 GstAggregator *self;
1622 GstAggregatorPad *agg_pad;
1623 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (element);
1624 GstAggregatorPrivate *priv = GST_AGGREGATOR (element)->priv;
1626 self = GST_AGGREGATOR (element);
1628 agg_pad = klass->create_new_pad (self, templ, req_name, caps);
1630 GST_ERROR_OBJECT (element, "Couldn't create new pad");
1634 GST_DEBUG_OBJECT (element, "Adding pad %s", GST_PAD_NAME (agg_pad));
1637 gst_pad_set_active (GST_PAD (agg_pad), TRUE);
1639 /* add the pad to the element */
1640 gst_element_add_pad (element, GST_PAD (agg_pad));
1642 return GST_PAD (agg_pad);
1645 /* Must be called with SRC_LOCK held */
1648 gst_aggregator_query_latency_unlocked (GstAggregator * self, GstQuery * query)
1650 gboolean query_ret, live;
1651 GstClockTime our_latency, min, max;
1653 query_ret = gst_pad_query_default (self->srcpad, GST_OBJECT (self), query);
1656 GST_WARNING_OBJECT (self, "Latency query failed");
1660 gst_query_parse_latency (query, &live, &min, &max);
1662 if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (min))) {
1663 GST_ERROR_OBJECT (self, "Invalid minimum latency %" GST_TIME_FORMAT
1664 ". Please file a bug at " PACKAGE_BUGREPORT ".", GST_TIME_ARGS (min));
1668 if (min > max && GST_CLOCK_TIME_IS_VALID (max)) {
1669 GST_ELEMENT_WARNING (self, CORE, CLOCK, (NULL),
1670 ("Impossible to configure latency: max %" GST_TIME_FORMAT " < min %"
1671 GST_TIME_FORMAT ". Add queues or other buffering elements.",
1672 GST_TIME_ARGS (max), GST_TIME_ARGS (min)));
1676 our_latency = self->priv->latency;
1678 self->priv->peer_latency_live = live;
1679 self->priv->peer_latency_min = min;
1680 self->priv->peer_latency_max = max;
1681 self->priv->has_peer_latency = TRUE;
1685 min += self->priv->sub_latency_min;
1686 if (GST_CLOCK_TIME_IS_VALID (self->priv->sub_latency_max)
1687 && GST_CLOCK_TIME_IS_VALID (max))
1688 max += self->priv->sub_latency_max + our_latency;
1690 max = GST_CLOCK_TIME_NONE;
1692 SRC_BROADCAST (self);
1694 GST_DEBUG_OBJECT (self, "configured latency live:%s min:%" G_GINT64_FORMAT
1695 " max:%" G_GINT64_FORMAT, live ? "true" : "false", min, max);
1697 gst_query_set_latency (query, live, min, max);
1703 * MUST be called with the src_lock held.
1705 * See gst_aggregator_get_latency() for doc
1708 gst_aggregator_get_latency_unlocked (GstAggregator * self)
1710 GstClockTime latency;
1712 g_return_val_if_fail (GST_IS_AGGREGATOR (self), 0);
1714 if (!self->priv->has_peer_latency) {
1715 GstQuery *query = gst_query_new_latency ();
1718 ret = gst_aggregator_query_latency_unlocked (self, query);
1719 gst_query_unref (query);
1721 return GST_CLOCK_TIME_NONE;
1724 if (!self->priv->has_peer_latency || !self->priv->peer_latency_live)
1725 return GST_CLOCK_TIME_NONE;
1727 /* latency_min is never GST_CLOCK_TIME_NONE by construction */
1728 latency = self->priv->peer_latency_min;
1731 latency += self->priv->latency;
1732 latency += self->priv->sub_latency_min;
1738 * gst_aggregator_get_latency:
1739 * @self: a #GstAggregator
1741 * Retrieves the latency values reported by @self in response to the latency
1742 * query, or %GST_CLOCK_TIME_NONE if there is not live source connected and the element
1743 * will not wait for the clock.
1745 * Typically only called by subclasses.
1747 * Returns: The latency or %GST_CLOCK_TIME_NONE if the element does not sync
1750 gst_aggregator_get_latency (GstAggregator * self)
1755 ret = gst_aggregator_get_latency_unlocked (self);
1762 gst_aggregator_send_event (GstElement * element, GstEvent * event)
1764 GstAggregator *self = GST_AGGREGATOR (element);
1766 GST_STATE_LOCK (element);
1767 if (GST_EVENT_TYPE (event) == GST_EVENT_SEEK &&
1768 GST_STATE (element) < GST_STATE_PAUSED) {
1772 GstSeekType start_type, stop_type;
1775 gst_event_parse_seek (event, &rate, &fmt, &flags, &start_type,
1776 &start, &stop_type, &stop);
1778 GST_OBJECT_LOCK (self);
1779 gst_segment_do_seek (&self->segment, rate, fmt, flags, start_type, start,
1780 stop_type, stop, NULL);
1781 self->priv->seqnum = gst_event_get_seqnum (event);
1782 self->priv->first_buffer = FALSE;
1783 GST_OBJECT_UNLOCK (self);
1785 GST_DEBUG_OBJECT (element, "Storing segment %" GST_PTR_FORMAT, event);
1787 GST_STATE_UNLOCK (element);
1790 return GST_ELEMENT_CLASS (aggregator_parent_class)->send_event (element,
1795 gst_aggregator_default_src_query (GstAggregator * self, GstQuery * query)
1797 gboolean res = TRUE;
1799 switch (GST_QUERY_TYPE (query)) {
1800 case GST_QUERY_SEEKING:
1804 /* don't pass it along as some (file)sink might claim it does
1805 * whereas with a collectpads in between that will not likely work */
1806 gst_query_parse_seeking (query, &format, NULL, NULL, NULL);
1807 gst_query_set_seeking (query, format, FALSE, 0, -1);
1812 case GST_QUERY_LATENCY:
1814 res = gst_aggregator_query_latency_unlocked (self, query);
1818 return gst_pad_query_default (self->srcpad, GST_OBJECT (self), query);
1825 gst_aggregator_event_forward_func (GstPad * pad, gpointer user_data)
1827 EventData *evdata = user_data;
1828 gboolean ret = TRUE;
1829 GstPad *peer = gst_pad_get_peer (pad);
1830 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
1833 if (evdata->only_to_active_pads && aggpad->priv->first_buffer) {
1834 GST_DEBUG_OBJECT (pad, "not sending event to inactive pad");
1837 ret = gst_pad_send_event (peer, gst_event_ref (evdata->event));
1838 GST_DEBUG_OBJECT (pad, "return of event push is %d", ret);
1839 gst_object_unref (peer);
1844 if (GST_EVENT_TYPE (evdata->event) == GST_EVENT_SEEK) {
1845 GstQuery *seeking = gst_query_new_seeking (GST_FORMAT_TIME);
1847 GST_DEBUG_OBJECT (pad, "Event %" GST_PTR_FORMAT " failed", evdata->event);
1849 if (gst_pad_query (peer, seeking)) {
1852 gst_query_parse_seeking (seeking, NULL, &seekable, NULL, NULL);
1854 if (seekable == FALSE) {
1855 GST_INFO_OBJECT (pad,
1856 "Source not seekable, We failed but it does not matter!");
1861 GST_ERROR_OBJECT (pad, "Query seeking FAILED");
1864 gst_query_unref (seeking);
1867 if (evdata->flush) {
1869 aggpad->priv->pending_flush_start = FALSE;
1870 aggpad->priv->pending_flush_stop = FALSE;
1871 PAD_UNLOCK (aggpad);
1874 evdata->one_actually_seeked = TRUE;
1877 evdata->result &= ret;
1879 /* Always send to all pads */
1884 gst_aggregator_forward_event_to_all_sinkpads (GstAggregator * self,
1887 evdata->result = TRUE;
1888 evdata->one_actually_seeked = FALSE;
1890 /* We first need to set all pads as flushing in a first pass
1891 * as flush_start flush_stop is sometimes sent synchronously
1892 * while we send the seek event */
1893 if (evdata->flush) {
1896 GST_OBJECT_LOCK (self);
1897 for (l = GST_ELEMENT_CAST (self)->sinkpads; l != NULL; l = l->next) {
1898 GstAggregatorPad *pad = l->data;
1901 pad->priv->pending_flush_start = TRUE;
1902 pad->priv->pending_flush_stop = FALSE;
1905 GST_OBJECT_UNLOCK (self);
1908 gst_pad_forward (self->srcpad, gst_aggregator_event_forward_func, evdata);
1910 gst_event_unref (evdata->event);
1914 gst_aggregator_do_seek (GstAggregator * self, GstEvent * event)
1919 GstSeekType start_type, stop_type;
1922 EventData evdata = { 0, };
1923 GstAggregatorPrivate *priv = self->priv;
1925 gst_event_parse_seek (event, &rate, &fmt, &flags, &start_type,
1926 &start, &stop_type, &stop);
1928 GST_INFO_OBJECT (self, "starting SEEK");
1930 flush = flags & GST_SEEK_FLAG_FLUSH;
1932 GST_OBJECT_LOCK (self);
1934 priv->pending_flush_start = TRUE;
1935 priv->flush_seeking = TRUE;
1938 gst_segment_do_seek (&self->segment, rate, fmt, flags, start_type, start,
1939 stop_type, stop, NULL);
1941 /* Seeking sets a position */
1942 self->priv->first_buffer = FALSE;
1943 GST_OBJECT_UNLOCK (self);
1945 /* forward the seek upstream */
1946 evdata.event = event;
1947 evdata.flush = flush;
1948 evdata.only_to_active_pads = FALSE;
1949 gst_aggregator_forward_event_to_all_sinkpads (self, &evdata);
1952 if (!evdata.result || !evdata.one_actually_seeked) {
1953 GST_OBJECT_LOCK (self);
1954 priv->flush_seeking = FALSE;
1955 priv->pending_flush_start = FALSE;
1956 GST_OBJECT_UNLOCK (self);
1959 GST_INFO_OBJECT (self, "seek done, result: %d", evdata.result);
1961 return evdata.result;
1965 gst_aggregator_default_src_event (GstAggregator * self, GstEvent * event)
1967 EventData evdata = { 0, };
1969 switch (GST_EVENT_TYPE (event)) {
1970 case GST_EVENT_SEEK:
1971 /* _do_seek() unrefs the event. */
1972 return gst_aggregator_do_seek (self, event);
1973 case GST_EVENT_NAVIGATION:
1974 /* navigation is rather pointless. */
1975 gst_event_unref (event);
1981 /* Don't forward QOS events to pads that had no active buffer yet. Otherwise
1982 * they will receive a QOS event that has earliest_time=0 (because we can't
1983 * have negative timestamps), and consider their buffer as too late */
1984 evdata.event = event;
1985 evdata.flush = FALSE;
1986 evdata.only_to_active_pads = GST_EVENT_TYPE (event) == GST_EVENT_QOS;
1987 gst_aggregator_forward_event_to_all_sinkpads (self, &evdata);
1988 return evdata.result;
1992 gst_aggregator_src_pad_event_func (GstPad * pad, GstObject * parent,
1995 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
1997 return klass->src_event (GST_AGGREGATOR (parent), event);
2001 gst_aggregator_src_pad_query_func (GstPad * pad, GstObject * parent,
2004 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2006 return klass->src_query (GST_AGGREGATOR (parent), query);
2010 gst_aggregator_src_pad_activate_mode_func (GstPad * pad,
2011 GstObject * parent, GstPadMode mode, gboolean active)
2013 GstAggregator *self = GST_AGGREGATOR (parent);
2014 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2016 if (klass->src_activate) {
2017 if (klass->src_activate (self, mode, active) == FALSE) {
2022 if (active == TRUE) {
2024 case GST_PAD_MODE_PUSH:
2026 GST_INFO_OBJECT (pad, "Activating pad!");
2027 gst_aggregator_start_srcpad_task (self);
2032 GST_ERROR_OBJECT (pad, "Only supported mode is PUSH");
2039 GST_INFO_OBJECT (self, "Deactivating srcpad");
2040 gst_aggregator_stop_srcpad_task (self, FALSE);
2046 gst_aggregator_default_sink_query (GstAggregator * self,
2047 GstAggregatorPad * aggpad, GstQuery * query)
2049 GstPad *pad = GST_PAD (aggpad);
2051 if (GST_QUERY_TYPE (query) == GST_QUERY_ALLOCATION) {
2052 GstQuery *decide_query = NULL;
2053 GstAggregatorClass *agg_class;
2056 GST_OBJECT_LOCK (self);
2058 if (G_UNLIKELY (!aggpad->priv->negotiated)) {
2059 GST_DEBUG_OBJECT (self,
2060 "not negotiated yet, can't answer ALLOCATION query");
2061 PAD_UNLOCK (aggpad);
2062 GST_OBJECT_UNLOCK (self);
2067 if ((decide_query = self->priv->allocation_query))
2068 gst_query_ref (decide_query);
2069 PAD_UNLOCK (aggpad);
2070 GST_OBJECT_UNLOCK (self);
2072 GST_DEBUG_OBJECT (self,
2073 "calling propose allocation with query %" GST_PTR_FORMAT, decide_query);
2075 agg_class = GST_AGGREGATOR_GET_CLASS (self);
2077 /* pass the query to the propose_allocation vmethod if any */
2078 if (agg_class->propose_allocation)
2079 ret = agg_class->propose_allocation (self, aggpad, decide_query, query);
2084 gst_query_unref (decide_query);
2086 GST_DEBUG_OBJECT (self, "ALLOCATION ret %d, %" GST_PTR_FORMAT, ret, query);
2090 return gst_pad_query_default (pad, GST_OBJECT (self), query);
2094 gst_aggregator_finalize (GObject * object)
2096 GstAggregator *self = (GstAggregator *) object;
2098 g_mutex_clear (&self->priv->src_lock);
2099 g_cond_clear (&self->priv->src_cond);
2101 G_OBJECT_CLASS (aggregator_parent_class)->finalize (object);
2105 * gst_aggregator_set_latency_property:
2106 * @agg: a #GstAggregator
2107 * @latency: the new latency value (in nanoseconds).
2109 * Sets the new latency value to @latency. This value is used to limit the
2110 * amount of time a pad waits for data to appear before considering the pad
2114 gst_aggregator_set_latency_property (GstAggregator * self, GstClockTime latency)
2118 g_return_if_fail (GST_IS_AGGREGATOR (self));
2119 g_return_if_fail (GST_CLOCK_TIME_IS_VALID (latency));
2122 changed = (self->priv->latency != latency);
2127 GST_OBJECT_LOCK (self);
2128 /* First lock all the pads */
2129 for (item = GST_ELEMENT_CAST (self)->sinkpads; item; item = item->next) {
2130 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (item->data);
2134 self->priv->latency = latency;
2136 SRC_BROADCAST (self);
2138 /* Now wake up the pads */
2139 for (item = GST_ELEMENT_CAST (self)->sinkpads; item; item = item->next) {
2140 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (item->data);
2141 PAD_BROADCAST_EVENT (aggpad);
2142 PAD_UNLOCK (aggpad);
2144 GST_OBJECT_UNLOCK (self);
2150 gst_element_post_message (GST_ELEMENT_CAST (self),
2151 gst_message_new_latency (GST_OBJECT_CAST (self)));
2155 * gst_aggregator_get_latency_property:
2156 * @agg: a #GstAggregator
2158 * Gets the latency value. See gst_aggregator_set_latency for
2161 * Returns: The time in nanoseconds to wait for data to arrive on a sink pad
2162 * before a pad is deemed unresponsive. A value of -1 means an
2166 gst_aggregator_get_latency_property (GstAggregator * agg)
2170 g_return_val_if_fail (GST_IS_AGGREGATOR (agg), GST_CLOCK_TIME_NONE);
2172 GST_OBJECT_LOCK (agg);
2173 res = agg->priv->latency;
2174 GST_OBJECT_UNLOCK (agg);
2180 gst_aggregator_set_property (GObject * object, guint prop_id,
2181 const GValue * value, GParamSpec * pspec)
2183 GstAggregator *agg = GST_AGGREGATOR (object);
2187 gst_aggregator_set_latency_property (agg, g_value_get_uint64 (value));
2189 case PROP_START_TIME_SELECTION:
2190 agg->priv->start_time_selection = g_value_get_enum (value);
2192 case PROP_START_TIME:
2193 agg->priv->start_time = g_value_get_uint64 (value);
2196 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2202 gst_aggregator_get_property (GObject * object, guint prop_id,
2203 GValue * value, GParamSpec * pspec)
2205 GstAggregator *agg = GST_AGGREGATOR (object);
2209 g_value_set_uint64 (value, gst_aggregator_get_latency_property (agg));
2211 case PROP_START_TIME_SELECTION:
2212 g_value_set_enum (value, agg->priv->start_time_selection);
2214 case PROP_START_TIME:
2215 g_value_set_uint64 (value, agg->priv->start_time);
2218 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2223 /* GObject vmethods implementations */
2225 gst_aggregator_class_init (GstAggregatorClass * klass)
2227 GObjectClass *gobject_class = (GObjectClass *) klass;
2228 GstElementClass *gstelement_class = (GstElementClass *) klass;
2230 aggregator_parent_class = g_type_class_peek_parent (klass);
2231 g_type_class_add_private (klass, sizeof (GstAggregatorPrivate));
2233 GST_DEBUG_CATEGORY_INIT (aggregator_debug, "aggregator",
2234 GST_DEBUG_FG_MAGENTA, "GstAggregator");
2236 klass->sink_event = gst_aggregator_default_sink_event;
2237 klass->sink_query = gst_aggregator_default_sink_query;
2239 klass->src_event = gst_aggregator_default_src_event;
2240 klass->src_query = gst_aggregator_default_src_query;
2242 klass->create_new_pad = gst_aggregator_default_create_new_pad;
2243 klass->update_src_caps = gst_aggregator_default_update_src_caps;
2244 klass->fixate_src_caps = gst_aggregator_default_fixate_src_caps;
2245 klass->negotiated_src_caps = gst_aggregator_default_negotiated_src_caps;
2247 gstelement_class->request_new_pad =
2248 GST_DEBUG_FUNCPTR (gst_aggregator_request_new_pad);
2249 gstelement_class->send_event = GST_DEBUG_FUNCPTR (gst_aggregator_send_event);
2250 gstelement_class->release_pad =
2251 GST_DEBUG_FUNCPTR (gst_aggregator_release_pad);
2252 gstelement_class->change_state =
2253 GST_DEBUG_FUNCPTR (gst_aggregator_change_state);
2255 gobject_class->set_property = gst_aggregator_set_property;
2256 gobject_class->get_property = gst_aggregator_get_property;
2257 gobject_class->finalize = gst_aggregator_finalize;
2259 g_object_class_install_property (gobject_class, PROP_LATENCY,
2260 g_param_spec_uint64 ("latency", "Buffer latency",
2261 "Additional latency in live mode to allow upstream "
2262 "to take longer to produce buffers for the current "
2263 "position (in nanoseconds)", 0, G_MAXUINT64,
2264 DEFAULT_LATENCY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
2266 g_object_class_install_property (gobject_class, PROP_START_TIME_SELECTION,
2267 g_param_spec_enum ("start-time-selection", "Start Time Selection",
2268 "Decides which start time is output",
2269 gst_aggregator_start_time_selection_get_type (),
2270 DEFAULT_START_TIME_SELECTION,
2271 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
2273 g_object_class_install_property (gobject_class, PROP_START_TIME,
2274 g_param_spec_uint64 ("start-time", "Start Time",
2275 "Start time to use if start-time-selection=set", 0,
2277 DEFAULT_START_TIME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
2279 GST_DEBUG_REGISTER_FUNCPTR (gst_aggregator_do_events_and_queries);
2283 gst_aggregator_init (GstAggregator * self, GstAggregatorClass * klass)
2285 GstPadTemplate *pad_template;
2286 GstAggregatorPrivate *priv;
2288 g_return_if_fail (klass->aggregate != NULL);
2291 G_TYPE_INSTANCE_GET_PRIVATE (self, GST_TYPE_AGGREGATOR,
2292 GstAggregatorPrivate);
2297 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass), "src");
2298 g_return_if_fail (pad_template != NULL);
2300 priv->max_padserial = -1;
2301 priv->tags_changed = FALSE;
2303 self->priv->peer_latency_live = FALSE;
2304 self->priv->peer_latency_min = self->priv->sub_latency_min = 0;
2305 self->priv->peer_latency_max = self->priv->sub_latency_max = 0;
2306 self->priv->has_peer_latency = FALSE;
2307 gst_aggregator_reset_flow_values (self);
2309 self->srcpad = gst_pad_new_from_template (pad_template, "src");
2311 gst_pad_set_event_function (self->srcpad,
2312 GST_DEBUG_FUNCPTR (gst_aggregator_src_pad_event_func));
2313 gst_pad_set_query_function (self->srcpad,
2314 GST_DEBUG_FUNCPTR (gst_aggregator_src_pad_query_func));
2315 gst_pad_set_activatemode_function (self->srcpad,
2316 GST_DEBUG_FUNCPTR (gst_aggregator_src_pad_activate_mode_func));
2318 gst_element_add_pad (GST_ELEMENT (self), self->srcpad);
2320 self->priv->latency = DEFAULT_LATENCY;
2321 self->priv->start_time_selection = DEFAULT_START_TIME_SELECTION;
2322 self->priv->start_time = DEFAULT_START_TIME;
2324 g_mutex_init (&self->priv->src_lock);
2325 g_cond_init (&self->priv->src_cond);
2328 /* we can't use G_DEFINE_ABSTRACT_TYPE because we need the klass in the _init
2329 * method to get to the padtemplates */
2331 gst_aggregator_get_type (void)
2333 static volatile gsize type = 0;
2335 if (g_once_init_enter (&type)) {
2337 static const GTypeInfo info = {
2338 sizeof (GstAggregatorClass),
2341 (GClassInitFunc) gst_aggregator_class_init,
2344 sizeof (GstAggregator),
2346 (GInstanceInitFunc) gst_aggregator_init,
2349 _type = g_type_register_static (GST_TYPE_ELEMENT,
2350 "GstAggregator", &info, G_TYPE_FLAG_ABSTRACT);
2351 g_once_init_leave (&type, _type);
2356 /* Must be called with SRC lock and PAD lock held */
2358 gst_aggregator_pad_has_space (GstAggregator * self, GstAggregatorPad * aggpad)
2360 /* Empty queue always has space */
2361 if (aggpad->priv->num_buffers == 0 && aggpad->priv->clipped_buffer == NULL)
2364 /* We also want at least two buffers, one is being processed and one is ready
2365 * for the next iteration when we operate in live mode. */
2366 if (self->priv->peer_latency_live && aggpad->priv->num_buffers < 2)
2369 /* zero latency, if there is a buffer, it's full */
2370 if (self->priv->latency == 0)
2373 /* Allow no more buffers than the latency */
2374 return (aggpad->priv->time_level <= self->priv->latency);
2377 /* Must be called with the PAD_LOCK held */
2379 apply_buffer (GstAggregatorPad * aggpad, GstBuffer * buffer, gboolean head)
2381 GstClockTime timestamp;
2383 if (GST_BUFFER_DTS_IS_VALID (buffer))
2384 timestamp = GST_BUFFER_DTS (buffer);
2386 timestamp = GST_BUFFER_PTS (buffer);
2388 if (timestamp == GST_CLOCK_TIME_NONE) {
2390 timestamp = aggpad->priv->head_position;
2392 timestamp = aggpad->priv->tail_position;
2396 if (GST_BUFFER_DURATION_IS_VALID (buffer))
2397 timestamp += GST_BUFFER_DURATION (buffer);
2400 aggpad->priv->head_position = timestamp;
2402 aggpad->priv->tail_position = timestamp;
2404 update_time_level (aggpad, head);
2408 * Can be called either from the sinkpad's chain function or from the srcpad's
2409 * thread in the case of a buffer synthetized from a GAP event.
2410 * Because of this second case, FLUSH_LOCK can't be used here.
2413 static GstFlowReturn
2414 gst_aggregator_pad_chain_internal (GstAggregator * self,
2415 GstAggregatorPad * aggpad, GstBuffer * buffer, gboolean head)
2417 GstFlowReturn flow_return;
2418 GstClockTime buf_pts;
2420 GST_DEBUG_OBJECT (aggpad, "Start chaining a buffer %" GST_PTR_FORMAT, buffer);
2423 flow_return = aggpad->priv->flow_return;
2424 if (flow_return != GST_FLOW_OK)
2427 PAD_UNLOCK (aggpad);
2429 buf_pts = GST_BUFFER_PTS (buffer);
2433 GST_OBJECT_LOCK (self);
2436 if (aggpad->priv->first_buffer) {
2437 self->priv->has_peer_latency = FALSE;
2438 aggpad->priv->first_buffer = FALSE;
2441 if ((gst_aggregator_pad_has_space (self, aggpad) || !head)
2442 && aggpad->priv->flow_return == GST_FLOW_OK) {
2444 g_queue_push_head (&aggpad->priv->data, buffer);
2446 g_queue_push_tail (&aggpad->priv->data, buffer);
2447 apply_buffer (aggpad, buffer, head);
2448 aggpad->priv->num_buffers++;
2450 SRC_BROADCAST (self);
2454 flow_return = aggpad->priv->flow_return;
2455 if (flow_return != GST_FLOW_OK) {
2456 GST_OBJECT_UNLOCK (self);
2460 GST_DEBUG_OBJECT (aggpad, "Waiting for buffer to be consumed");
2461 GST_OBJECT_UNLOCK (self);
2463 PAD_WAIT_EVENT (aggpad);
2465 PAD_UNLOCK (aggpad);
2468 if (self->priv->first_buffer) {
2469 GstClockTime start_time;
2471 switch (self->priv->start_time_selection) {
2472 case GST_AGGREGATOR_START_TIME_SELECTION_ZERO:
2476 case GST_AGGREGATOR_START_TIME_SELECTION_FIRST:
2477 GST_OBJECT_LOCK (aggpad);
2478 if (aggpad->priv->head_segment.format == GST_FORMAT_TIME) {
2479 start_time = buf_pts;
2480 if (start_time != -1) {
2481 start_time = MAX (start_time, aggpad->priv->head_segment.start);
2483 gst_segment_to_running_time (&aggpad->priv->head_segment,
2484 GST_FORMAT_TIME, start_time);
2488 GST_WARNING_OBJECT (aggpad,
2489 "Ignoring request of selecting the first start time "
2490 "as the segment is a %s segment instead of a time segment",
2491 gst_format_get_name (aggpad->segment.format));
2493 GST_OBJECT_UNLOCK (aggpad);
2495 case GST_AGGREGATOR_START_TIME_SELECTION_SET:
2496 start_time = self->priv->start_time;
2497 if (start_time == -1)
2502 if (start_time != -1) {
2503 if (self->segment.position == -1)
2504 self->segment.position = start_time;
2506 self->segment.position = MIN (start_time, self->segment.position);
2508 GST_DEBUG_OBJECT (self, "Selecting start time %" GST_TIME_FORMAT,
2509 GST_TIME_ARGS (start_time));
2513 PAD_UNLOCK (aggpad);
2514 GST_OBJECT_UNLOCK (self);
2517 GST_DEBUG_OBJECT (aggpad, "Done chaining");
2522 PAD_UNLOCK (aggpad);
2524 GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping buffer",
2525 gst_flow_get_name (flow_return));
2527 gst_buffer_unref (buffer);
2532 static GstFlowReturn
2533 gst_aggregator_pad_chain (GstPad * pad, GstObject * object, GstBuffer * buffer)
2536 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
2538 PAD_FLUSH_LOCK (aggpad);
2540 ret = gst_aggregator_pad_chain_internal (GST_AGGREGATOR_CAST (object),
2541 aggpad, buffer, TRUE);
2543 PAD_FLUSH_UNLOCK (aggpad);
2549 gst_aggregator_pad_query_func (GstPad * pad, GstObject * parent,
2552 GstAggregator *self = GST_AGGREGATOR (parent);
2553 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
2555 if (GST_QUERY_IS_SERIALIZED (query)) {
2557 gboolean ret = FALSE;
2562 if (aggpad->priv->flow_return != GST_FLOW_OK) {
2567 g_queue_push_head (&aggpad->priv->data, query);
2568 SRC_BROADCAST (self);
2571 while (!gst_aggregator_pad_queue_is_empty (aggpad)
2572 && aggpad->priv->flow_return == GST_FLOW_OK) {
2573 GST_DEBUG_OBJECT (aggpad, "Waiting for buffer to be consumed");
2574 PAD_WAIT_EVENT (aggpad);
2577 s = gst_query_writable_structure (query);
2578 if (gst_structure_get_boolean (s, "gst-aggregator-retval", &ret))
2579 gst_structure_remove_field (s, "gst-aggregator-retval");
2581 g_queue_remove (&aggpad->priv->data, query);
2583 if (aggpad->priv->flow_return != GST_FLOW_OK)
2586 PAD_UNLOCK (aggpad);
2590 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2592 return klass->sink_query (self, aggpad, query);
2596 GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping query",
2597 gst_flow_get_name (aggpad->priv->flow_return));
2598 PAD_UNLOCK (aggpad);
2603 /* Queue serialized events and let the others go through directly.
2604 * The queued events with be handled from the src-pad task in
2605 * gst_aggregator_do_events_and_queries().
2607 static GstFlowReturn
2608 gst_aggregator_pad_event_func (GstPad * pad, GstObject * parent,
2611 GstFlowReturn ret = GST_FLOW_OK;
2612 GstAggregator *self = GST_AGGREGATOR (parent);
2613 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
2615 if (GST_EVENT_IS_SERIALIZED (event)
2616 && GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP) {
2620 if (aggpad->priv->flow_return != GST_FLOW_OK)
2623 if (GST_EVENT_TYPE (event) == GST_EVENT_SEGMENT) {
2624 GST_OBJECT_LOCK (aggpad);
2625 gst_event_copy_segment (event, &aggpad->priv->head_segment);
2626 aggpad->priv->head_position = aggpad->priv->head_segment.position;
2627 update_time_level (aggpad, TRUE);
2628 GST_OBJECT_UNLOCK (aggpad);
2631 GST_DEBUG_OBJECT (aggpad, "Store event in queue: %" GST_PTR_FORMAT, event);
2632 g_queue_push_head (&aggpad->priv->data, event);
2633 SRC_BROADCAST (self);
2634 PAD_UNLOCK (aggpad);
2637 GstAggregatorClass *klass = GST_AGGREGATOR_GET_CLASS (parent);
2639 if (!klass->sink_event (self, aggpad, event)) {
2640 /* Copied from GstPad to convert boolean to a GstFlowReturn in
2641 * the event handling func */
2642 ret = GST_FLOW_ERROR;
2649 GST_DEBUG_OBJECT (aggpad, "Pad is %s, dropping event",
2650 gst_flow_get_name (aggpad->priv->flow_return));
2651 PAD_UNLOCK (aggpad);
2653 if (GST_EVENT_IS_STICKY (event))
2654 gst_pad_store_sticky_event (pad, event);
2655 gst_event_unref (event);
2657 return aggpad->priv->flow_return;
2661 gst_aggregator_pad_activate_mode_func (GstPad * pad,
2662 GstObject * parent, GstPadMode mode, gboolean active)
2664 GstAggregator *self = GST_AGGREGATOR (parent);
2665 GstAggregatorPad *aggpad = GST_AGGREGATOR_PAD (pad);
2667 if (active == FALSE) {
2669 gst_aggregator_pad_set_flushing (aggpad, GST_FLOW_FLUSHING, TRUE);
2670 SRC_BROADCAST (self);
2674 aggpad->priv->flow_return = GST_FLOW_OK;
2675 PAD_BROADCAST_EVENT (aggpad);
2676 PAD_UNLOCK (aggpad);
2682 /***********************************
2683 * GstAggregatorPad implementation *
2684 ************************************/
2685 G_DEFINE_TYPE (GstAggregatorPad, gst_aggregator_pad, GST_TYPE_PAD);
2688 gst_aggregator_pad_constructed (GObject * object)
2690 GstPad *pad = GST_PAD (object);
2692 gst_pad_set_chain_function (pad,
2693 GST_DEBUG_FUNCPTR (gst_aggregator_pad_chain));
2694 gst_pad_set_event_full_function_full (pad,
2695 GST_DEBUG_FUNCPTR (gst_aggregator_pad_event_func), NULL, NULL);
2696 gst_pad_set_query_function (pad,
2697 GST_DEBUG_FUNCPTR (gst_aggregator_pad_query_func));
2698 gst_pad_set_activatemode_function (pad,
2699 GST_DEBUG_FUNCPTR (gst_aggregator_pad_activate_mode_func));
2703 gst_aggregator_pad_finalize (GObject * object)
2705 GstAggregatorPad *pad = (GstAggregatorPad *) object;
2707 g_cond_clear (&pad->priv->event_cond);
2708 g_mutex_clear (&pad->priv->flush_lock);
2709 g_mutex_clear (&pad->priv->lock);
2711 G_OBJECT_CLASS (gst_aggregator_pad_parent_class)->finalize (object);
2715 gst_aggregator_pad_dispose (GObject * object)
2717 GstAggregatorPad *pad = (GstAggregatorPad *) object;
2719 gst_aggregator_pad_set_flushing (pad, GST_FLOW_FLUSHING, TRUE);
2721 G_OBJECT_CLASS (gst_aggregator_pad_parent_class)->dispose (object);
2725 gst_aggregator_pad_class_init (GstAggregatorPadClass * klass)
2727 GObjectClass *gobject_class = (GObjectClass *) klass;
2729 g_type_class_add_private (klass, sizeof (GstAggregatorPadPrivate));
2731 gobject_class->constructed = gst_aggregator_pad_constructed;
2732 gobject_class->finalize = gst_aggregator_pad_finalize;
2733 gobject_class->dispose = gst_aggregator_pad_dispose;
2737 gst_aggregator_pad_init (GstAggregatorPad * pad)
2740 G_TYPE_INSTANCE_GET_PRIVATE (pad, GST_TYPE_AGGREGATOR_PAD,
2741 GstAggregatorPadPrivate);
2743 g_queue_init (&pad->priv->data);
2744 g_cond_init (&pad->priv->event_cond);
2746 g_mutex_init (&pad->priv->flush_lock);
2747 g_mutex_init (&pad->priv->lock);
2749 gst_aggregator_pad_reset_unlocked (pad);
2750 pad->priv->negotiated = FALSE;
2753 /* Must be called with the PAD_LOCK held */
2755 gst_aggregator_pad_buffer_consumed (GstAggregatorPad * pad)
2757 pad->priv->num_buffers--;
2758 GST_TRACE_OBJECT (pad, "Consuming buffer");
2759 PAD_BROADCAST_EVENT (pad);
2762 /* Must be called with the PAD_LOCK held */
2764 gst_aggregator_pad_clip_buffer_unlocked (GstAggregatorPad * pad)
2766 GstAggregator *self = NULL;
2767 GstAggregatorClass *aggclass = NULL;
2768 GstBuffer *buffer = NULL;
2770 while (pad->priv->clipped_buffer == NULL &&
2771 GST_IS_BUFFER (g_queue_peek_tail (&pad->priv->data))) {
2772 buffer = g_queue_pop_tail (&pad->priv->data);
2774 apply_buffer (pad, buffer, FALSE);
2776 /* We only take the parent here so that it's not taken if the buffer is
2777 * already clipped or if the queue is empty.
2780 self = GST_AGGREGATOR (gst_pad_get_parent_element (GST_PAD (pad)));
2782 gst_buffer_unref (buffer);
2786 aggclass = GST_AGGREGATOR_GET_CLASS (self);
2789 if (aggclass->clip) {
2790 GST_TRACE_OBJECT (pad, "Clipping: %" GST_PTR_FORMAT, buffer);
2792 buffer = aggclass->clip (self, pad, buffer);
2794 if (buffer == NULL) {
2795 gst_aggregator_pad_buffer_consumed (pad);
2796 GST_TRACE_OBJECT (pad, "Clipping consumed the buffer");
2800 pad->priv->clipped_buffer = buffer;
2804 gst_object_unref (self);
2808 * gst_aggregator_pad_steal_buffer:
2809 * @pad: the pad to get buffer from
2811 * Steal the ref to the buffer currently queued in @pad.
2813 * Returns: (transfer full): The buffer in @pad or NULL if no buffer was
2814 * queued. You should unref the buffer after usage.
2817 gst_aggregator_pad_steal_buffer (GstAggregatorPad * pad)
2823 gst_aggregator_pad_clip_buffer_unlocked (pad);
2825 buffer = pad->priv->clipped_buffer;
2828 pad->priv->clipped_buffer = NULL;
2829 gst_aggregator_pad_buffer_consumed (pad);
2830 GST_DEBUG_OBJECT (pad, "Consumed: %" GST_PTR_FORMAT, buffer);
2839 * gst_aggregator_pad_drop_buffer:
2840 * @pad: the pad where to drop any pending buffer
2842 * Drop the buffer currently queued in @pad.
2844 * Returns: TRUE if there was a buffer queued in @pad, or FALSE if not.
2847 gst_aggregator_pad_drop_buffer (GstAggregatorPad * pad)
2851 buf = gst_aggregator_pad_steal_buffer (pad);
2856 gst_buffer_unref (buf);
2861 * gst_aggregator_pad_get_buffer:
2862 * @pad: the pad to get buffer from
2864 * Returns: (transfer full): A reference to the buffer in @pad or
2865 * NULL if no buffer was queued. You should unref the buffer after
2869 gst_aggregator_pad_get_buffer (GstAggregatorPad * pad)
2875 gst_aggregator_pad_clip_buffer_unlocked (pad);
2877 if (pad->priv->clipped_buffer) {
2878 buffer = gst_buffer_ref (pad->priv->clipped_buffer);
2888 * gst_aggregator_pad_is_eos:
2889 * @pad: an aggregator pad
2891 * Returns: %TRUE if the pad is EOS, otherwise %FALSE.
2894 gst_aggregator_pad_is_eos (GstAggregatorPad * pad)
2899 is_eos = pad->priv->eos;
2907 * gst_aggregator_merge_tags:
2908 * @self: a #GstAggregator
2909 * @tags: a #GstTagList to merge
2910 * @mode: the #GstTagMergeMode to use
2912 * Adds tags to so-called pending tags, which will be processed
2913 * before pushing out data downstream.
2915 * Note that this is provided for convenience, and the subclass is
2916 * not required to use this and can still do tag handling on its own.
2921 gst_aggregator_merge_tags (GstAggregator * self,
2922 const GstTagList * tags, GstTagMergeMode mode)
2926 g_return_if_fail (GST_IS_AGGREGATOR (self));
2927 g_return_if_fail (tags == NULL || GST_IS_TAG_LIST (tags));
2929 /* FIXME Check if we can use OBJECT lock here! */
2930 GST_OBJECT_LOCK (self);
2932 GST_DEBUG_OBJECT (self, "merging tags %" GST_PTR_FORMAT, tags);
2933 otags = self->priv->tags;
2934 self->priv->tags = gst_tag_list_merge (self->priv->tags, tags, mode);
2936 gst_tag_list_unref (otags);
2937 self->priv->tags_changed = TRUE;
2938 GST_OBJECT_UNLOCK (self);
2943 * gst_aggregator_set_latency:
2944 * @self: a #GstAggregator
2945 * @min_latency: minimum latency
2946 * @max_latency: maximum latency
2948 * Lets #GstAggregator sub-classes tell the baseclass what their internal
2949 * latency is. Will also post a LATENCY message on the bus so the pipeline
2950 * can reconfigure its global latency.
2953 gst_aggregator_set_latency (GstAggregator * self,
2954 GstClockTime min_latency, GstClockTime max_latency)
2956 gboolean changed = FALSE;
2958 g_return_if_fail (GST_IS_AGGREGATOR (self));
2959 g_return_if_fail (GST_CLOCK_TIME_IS_VALID (min_latency));
2960 g_return_if_fail (max_latency >= min_latency);
2963 if (self->priv->sub_latency_min != min_latency) {
2964 self->priv->sub_latency_min = min_latency;
2967 if (self->priv->sub_latency_max != max_latency) {
2968 self->priv->sub_latency_max = max_latency;
2973 SRC_BROADCAST (self);
2977 gst_element_post_message (GST_ELEMENT_CAST (self),
2978 gst_message_new_latency (GST_OBJECT_CAST (self)));
2983 * gst_aggregator_get_buffer_pool:
2984 * @self: a #GstAggregator
2986 * Returns: (transfer full): the instance of the #GstBufferPool used
2987 * by @trans; free it after use it
2990 gst_aggregator_get_buffer_pool (GstAggregator * self)
2992 GstBufferPool *pool;
2994 g_return_val_if_fail (GST_IS_AGGREGATOR (self), NULL);
2996 GST_OBJECT_LOCK (self);
2997 pool = self->priv->pool;
2999 gst_object_ref (pool);
3000 GST_OBJECT_UNLOCK (self);
3006 * gst_aggregator_get_allocator:
3007 * @self: a #GstAggregator
3008 * @allocator: (out) (allow-none) (transfer full): the #GstAllocator
3010 * @params: (out) (allow-none) (transfer full): the
3011 * #GstAllocationParams of @allocator
3013 * Lets #GstAggregator sub-classes get the memory @allocator
3014 * acquired by the base class and its @params.
3016 * Unref the @allocator after use it.
3019 gst_aggregator_get_allocator (GstAggregator * self,
3020 GstAllocator ** allocator, GstAllocationParams * params)
3022 g_return_if_fail (GST_IS_AGGREGATOR (self));
3025 *allocator = self->priv->allocator ?
3026 gst_object_ref (self->priv->allocator) : NULL;
3029 *params = self->priv->allocation_params;