2 * Copyright (C) 2006 Edward Hervey <edward@fluendo.com>
3 * Copyright (C) 2007 Jan Schmidt <jan@fluendo.com>
4 * Copyright (C) 2007 Wim Taymans <wim@fluendo.com>
5 * Copyright (C) 2011 Sebastian Dröge <sebastian.droege@collabora.co.uk>
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Library General Public
11 * License as published by the Free Software Foundation; either
12 * version 2 of the License, or (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Library General Public License for more details.
19 * You should have received a copy of the GNU Library General Public
20 * License along with this library; if not, write to the
21 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
22 * Boston, MA 02110-1301, USA.
26 * SECTION:element-multiqueue
27 * @see_also: #GstQueue
31 * Multiqueue is similar to a normal #GstQueue with the following additional
35 * <itemizedlist><title>Multiple streamhandling</title>
37 * The element handles queueing data on more than one stream at once. To
38 * achieve such a feature it has request sink pads (sink%u) and
39 * 'sometimes' src pads (src%u).
41 * When requesting a given sinkpad with gst_element_get_request_pad(),
42 * the associated srcpad for that stream will be created.
43 * Example: requesting sink1 will generate src1.
48 * <itemizedlist><title>Non-starvation on multiple streams</title>
50 * If more than one stream is used with the element, the streams' queues
51 * will be dynamically grown (up to a limit), in order to ensure that no
52 * stream is risking data starvation. This guarantees that at any given
53 * time there are at least N bytes queued and available for each individual
56 * If an EOS event comes through a srcpad, the associated queue will be
57 * considered as 'not-empty' in the queue-size-growing algorithm.
62 * <itemizedlist><title>Non-linked srcpads graceful handling</title>
64 * In order to better support dynamic switching between streams, the multiqueue
65 * (unlike the current GStreamer queue) continues to push buffers on non-linked
66 * pads rather than shutting down.
68 * In addition, to prevent a non-linked stream from very quickly consuming all
69 * available buffers and thus 'racing ahead' of the other streams, the element
70 * must ensure that buffers and inlined events for a non-linked stream are pushed
71 * in the same order as they were received, relative to the other streams
72 * controlled by the element. This means that a buffer cannot be pushed to a
73 * non-linked pad any sooner than buffers in any other stream which were received
81 * Data is queued until one of the limits specified by the
82 * #GstMultiQueue:max-size-buffers, #GstMultiQueue:max-size-bytes and/or
83 * #GstMultiQueue:max-size-time properties has been reached. Any attempt to push
84 * more buffers into the queue will block the pushing thread until more space
85 * becomes available. #GstMultiQueue:extra-size-buffers,
88 * #GstMultiQueue:extra-size-bytes and #GstMultiQueue:extra-size-time are
92 * The default queue size limits are 5 buffers, 10MB of data, or
93 * two second worth of data, whichever is reached first. Note that the number
94 * of buffers will dynamically grow depending on the fill level of
98 * The #GstMultiQueue::underrun signal is emitted when all of the queues
99 * are empty. The #GstMultiQueue::overrun signal is emitted when one of the
101 * Both signals are emitted from the context of the streaming thread.
105 * Last reviewed on 2008-01-25 (0.10.17)
114 #include "gstmultiqueue.h"
115 #include <gst/glib-compat-private.h>
119 * @sinkpad: associated sink #GstPad
120 * @srcpad: associated source #GstPad
122 * Structure containing all information and properties about
125 typedef struct _GstSingleQueue GstSingleQueue;
127 struct _GstSingleQueue
129 /* unique identifier of the queue */
132 GstMultiQueue *mqueue;
137 /* flowreturn of previous srcpad push */
138 GstFlowReturn srcresult;
139 /* If something was actually pushed on
140 * this pad after flushing/pad activation
141 * and the srcresult corresponds to something
147 GstSegment sink_segment;
148 GstSegment src_segment;
150 /* position of src/sink */
151 GstClockTime sinktime, srctime;
152 /* TRUE if either position needs to be recalculated */
153 gboolean sink_tainted, src_tainted;
157 GstDataQueueSize max_size, extra_size;
158 GstClockTime cur_time;
162 /* Protected by global lock */
163 guint32 nextid; /* ID of the next object waiting to be pushed */
164 guint32 oldid; /* ID of the last object pushed (last in a series) */
165 guint32 last_oldid; /* Previously observed old_id, reset to MAXUINT32 on flush */
166 GstClockTime next_time; /* End running time of next buffer to be pushed */
167 GstClockTime last_time; /* Start running time of last pushed buffer */
168 GCond turn; /* SingleQueue turn waiting conditional */
170 /* for serialized queries */
176 /* Extension of GstDataQueueItem structure for our usage */
177 typedef struct _GstMultiQueueItem GstMultiQueueItem;
179 struct _GstMultiQueueItem
181 GstMiniObject *object;
186 GDestroyNotify destroy;
192 static GstSingleQueue *gst_single_queue_new (GstMultiQueue * mqueue, guint id);
193 static void gst_single_queue_free (GstSingleQueue * squeue);
195 static void wake_up_next_non_linked (GstMultiQueue * mq);
196 static void compute_high_id (GstMultiQueue * mq);
197 static void compute_high_time (GstMultiQueue * mq);
198 static void single_queue_overrun_cb (GstDataQueue * dq, GstSingleQueue * sq);
199 static void single_queue_underrun_cb (GstDataQueue * dq, GstSingleQueue * sq);
201 static void gst_single_queue_flush_queue (GstSingleQueue * sq, gboolean full);
203 static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink_%u",
206 GST_STATIC_CAPS_ANY);
208 static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src_%u",
211 GST_STATIC_CAPS_ANY);
213 GST_DEBUG_CATEGORY_STATIC (multi_queue_debug);
214 #define GST_CAT_DEFAULT (multi_queue_debug)
216 /* Signals and args */
224 /* default limits, we try to keep up to 2 seconds of data and if there is not
225 * time, up to 10 MB. The number of buffers is dynamically scaled to make sure
226 * there is data in the queues. Normally, the byte and time limits are not hit
227 * in theses conditions. */
228 #define DEFAULT_MAX_SIZE_BYTES 10 * 1024 * 1024 /* 10 MB */
229 #define DEFAULT_MAX_SIZE_BUFFERS 5
230 #define DEFAULT_MAX_SIZE_TIME 2 * GST_SECOND
232 /* second limits. When we hit one of the above limits we are probably dealing
233 * with a badly muxed file and we scale the limits to these emergency values.
234 * This is currently not yet implemented.
235 * Since we dynamically scale the queue buffer size up to the limits but avoid
236 * going above the max-size-buffers when we can, we don't really need this
237 * aditional extra size. */
238 #define DEFAULT_EXTRA_SIZE_BYTES 10 * 1024 * 1024 /* 10 MB */
239 #define DEFAULT_EXTRA_SIZE_BUFFERS 5
240 #define DEFAULT_EXTRA_SIZE_TIME 3 * GST_SECOND
242 #define DEFAULT_USE_BUFFERING FALSE
243 #define DEFAULT_LOW_PERCENT 10
244 #define DEFAULT_HIGH_PERCENT 99
245 #define DEFAULT_SYNC_BY_RUNNING_TIME FALSE
250 PROP_EXTRA_SIZE_BYTES,
251 PROP_EXTRA_SIZE_BUFFERS,
252 PROP_EXTRA_SIZE_TIME,
254 PROP_MAX_SIZE_BUFFERS,
259 PROP_SYNC_BY_RUNNING_TIME,
263 #define GST_MULTI_QUEUE_MUTEX_LOCK(q) G_STMT_START { \
264 g_mutex_lock (&q->qlock); \
267 #define GST_MULTI_QUEUE_MUTEX_UNLOCK(q) G_STMT_START { \
268 g_mutex_unlock (&q->qlock); \
271 static void gst_multi_queue_finalize (GObject * object);
272 static void gst_multi_queue_set_property (GObject * object,
273 guint prop_id, const GValue * value, GParamSpec * pspec);
274 static void gst_multi_queue_get_property (GObject * object,
275 guint prop_id, GValue * value, GParamSpec * pspec);
277 static GstPad *gst_multi_queue_request_new_pad (GstElement * element,
278 GstPadTemplate * temp, const gchar * name, const GstCaps * caps);
279 static void gst_multi_queue_release_pad (GstElement * element, GstPad * pad);
280 static GstStateChangeReturn gst_multi_queue_change_state (GstElement *
281 element, GstStateChange transition);
283 static void gst_multi_queue_loop (GstPad * pad);
286 GST_DEBUG_CATEGORY_INIT (multi_queue_debug, "multiqueue", 0, "multiqueue element");
287 #define gst_multi_queue_parent_class parent_class
288 G_DEFINE_TYPE_WITH_CODE (GstMultiQueue, gst_multi_queue, GST_TYPE_ELEMENT,
291 static guint gst_multi_queue_signals[LAST_SIGNAL] = { 0 };
294 gst_multi_queue_class_init (GstMultiQueueClass * klass)
296 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
297 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
299 gobject_class->set_property = gst_multi_queue_set_property;
300 gobject_class->get_property = gst_multi_queue_get_property;
305 * GstMultiQueue::underrun:
306 * @multiqueue: the multiqueue instance
308 * This signal is emitted from the streaming thread when there is
309 * no data in any of the queues inside the multiqueue instance (underrun).
311 * This indicates either starvation or EOS from the upstream data sources.
313 gst_multi_queue_signals[SIGNAL_UNDERRUN] =
314 g_signal_new ("underrun", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
315 G_STRUCT_OFFSET (GstMultiQueueClass, underrun), NULL, NULL,
316 g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
319 * GstMultiQueue::overrun:
320 * @multiqueue: the multiqueue instance
322 * Reports that one of the queues in the multiqueue is full (overrun).
323 * A queue is full if the total amount of data inside it (num-buffers, time,
324 * size) is higher than the boundary values which can be set through the
325 * GObject properties.
327 * This can be used as an indicator of pre-roll.
329 gst_multi_queue_signals[SIGNAL_OVERRUN] =
330 g_signal_new ("overrun", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
331 G_STRUCT_OFFSET (GstMultiQueueClass, overrun), NULL, NULL,
332 g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
336 g_object_class_install_property (gobject_class, PROP_MAX_SIZE_BYTES,
337 g_param_spec_uint ("max-size-bytes", "Max. size (kB)",
338 "Max. amount of data in the queue (bytes, 0=disable)",
339 0, G_MAXUINT, DEFAULT_MAX_SIZE_BYTES,
340 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
341 g_object_class_install_property (gobject_class, PROP_MAX_SIZE_BUFFERS,
342 g_param_spec_uint ("max-size-buffers", "Max. size (buffers)",
343 "Max. number of buffers in the queue (0=disable)", 0, G_MAXUINT,
344 DEFAULT_MAX_SIZE_BUFFERS,
345 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
346 g_object_class_install_property (gobject_class, PROP_MAX_SIZE_TIME,
347 g_param_spec_uint64 ("max-size-time", "Max. size (ns)",
348 "Max. amount of data in the queue (in ns, 0=disable)", 0, G_MAXUINT64,
349 DEFAULT_MAX_SIZE_TIME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
351 g_object_class_install_property (gobject_class, PROP_EXTRA_SIZE_BYTES,
352 g_param_spec_uint ("extra-size-bytes", "Extra Size (kB)",
353 "Amount of data the queues can grow if one of them is empty (bytes, 0=disable)"
354 " (NOT IMPLEMENTED)",
355 0, G_MAXUINT, DEFAULT_EXTRA_SIZE_BYTES,
356 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
357 g_object_class_install_property (gobject_class, PROP_EXTRA_SIZE_BUFFERS,
358 g_param_spec_uint ("extra-size-buffers", "Extra Size (buffers)",
359 "Amount of buffers the queues can grow if one of them is empty (0=disable)"
360 " (NOT IMPLEMENTED)",
361 0, G_MAXUINT, DEFAULT_EXTRA_SIZE_BUFFERS,
362 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
363 g_object_class_install_property (gobject_class, PROP_EXTRA_SIZE_TIME,
364 g_param_spec_uint64 ("extra-size-time", "Extra Size (ns)",
365 "Amount of time the queues can grow if one of them is empty (in ns, 0=disable)"
366 " (NOT IMPLEMENTED)",
367 0, G_MAXUINT64, DEFAULT_EXTRA_SIZE_TIME,
368 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
371 * GstMultiQueue:use-buffering
373 * Enable the buffering option in multiqueue so that BUFFERING messages are
374 * emitted based on low-/high-percent thresholds.
376 g_object_class_install_property (gobject_class, PROP_USE_BUFFERING,
377 g_param_spec_boolean ("use-buffering", "Use buffering",
378 "Emit GST_MESSAGE_BUFFERING based on low-/high-percent thresholds",
379 DEFAULT_USE_BUFFERING, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
381 * GstMultiQueue:low-percent
383 * Low threshold percent for buffering to start.
385 g_object_class_install_property (gobject_class, PROP_LOW_PERCENT,
386 g_param_spec_int ("low-percent", "Low percent",
387 "Low threshold for buffering to start", 0, 100,
388 DEFAULT_LOW_PERCENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
390 * GstMultiQueue:high-percent
392 * High threshold percent for buffering to finish.
394 g_object_class_install_property (gobject_class, PROP_HIGH_PERCENT,
395 g_param_spec_int ("high-percent", "High percent",
396 "High threshold for buffering to finish", 0, 100,
397 DEFAULT_HIGH_PERCENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
400 * GstMultiQueue:sync-by-running-time
402 * If enabled multiqueue will synchronize deactivated or not-linked streams
403 * to the activated and linked streams by taking the running time.
404 * Otherwise multiqueue will synchronize the deactivated or not-linked
405 * streams by keeping the order in which buffers and events arrived compared
406 * to active and linked streams.
408 g_object_class_install_property (gobject_class, PROP_SYNC_BY_RUNNING_TIME,
409 g_param_spec_boolean ("sync-by-running-time", "Sync By Running Time",
410 "Synchronize deactivated or not-linked streams by running time",
411 DEFAULT_SYNC_BY_RUNNING_TIME,
412 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
414 gobject_class->finalize = gst_multi_queue_finalize;
416 gst_element_class_set_static_metadata (gstelement_class,
418 "Generic", "Multiple data queue", "Edward Hervey <edward@fluendo.com>");
419 gst_element_class_add_pad_template (gstelement_class,
420 gst_static_pad_template_get (&sinktemplate));
421 gst_element_class_add_pad_template (gstelement_class,
422 gst_static_pad_template_get (&srctemplate));
424 gstelement_class->request_new_pad =
425 GST_DEBUG_FUNCPTR (gst_multi_queue_request_new_pad);
426 gstelement_class->release_pad =
427 GST_DEBUG_FUNCPTR (gst_multi_queue_release_pad);
428 gstelement_class->change_state =
429 GST_DEBUG_FUNCPTR (gst_multi_queue_change_state);
433 gst_multi_queue_init (GstMultiQueue * mqueue)
435 mqueue->nbqueues = 0;
436 mqueue->queues = NULL;
438 mqueue->max_size.bytes = DEFAULT_MAX_SIZE_BYTES;
439 mqueue->max_size.visible = DEFAULT_MAX_SIZE_BUFFERS;
440 mqueue->max_size.time = DEFAULT_MAX_SIZE_TIME;
442 mqueue->extra_size.bytes = DEFAULT_EXTRA_SIZE_BYTES;
443 mqueue->extra_size.visible = DEFAULT_EXTRA_SIZE_BUFFERS;
444 mqueue->extra_size.time = DEFAULT_EXTRA_SIZE_TIME;
446 mqueue->use_buffering = DEFAULT_USE_BUFFERING;
447 mqueue->low_percent = DEFAULT_LOW_PERCENT;
448 mqueue->high_percent = DEFAULT_HIGH_PERCENT;
450 mqueue->sync_by_running_time = DEFAULT_SYNC_BY_RUNNING_TIME;
454 mqueue->high_time = GST_CLOCK_TIME_NONE;
456 g_mutex_init (&mqueue->qlock);
460 gst_multi_queue_finalize (GObject * object)
462 GstMultiQueue *mqueue = GST_MULTI_QUEUE (object);
464 g_list_foreach (mqueue->queues, (GFunc) gst_single_queue_free, NULL);
465 g_list_free (mqueue->queues);
466 mqueue->queues = NULL;
467 mqueue->queues_cookie++;
469 /* free/unref instance data */
470 g_mutex_clear (&mqueue->qlock);
472 G_OBJECT_CLASS (parent_class)->finalize (object);
475 #define SET_CHILD_PROPERTY(mq,format) G_STMT_START { \
476 GList * tmp = mq->queues; \
478 GstSingleQueue *q = (GstSingleQueue*)tmp->data; \
479 q->max_size.format = mq->max_size.format; \
480 tmp = g_list_next(tmp); \
485 gst_multi_queue_set_property (GObject * object, guint prop_id,
486 const GValue * value, GParamSpec * pspec)
488 GstMultiQueue *mq = GST_MULTI_QUEUE (object);
491 case PROP_MAX_SIZE_BYTES:
492 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
493 mq->max_size.bytes = g_value_get_uint (value);
494 SET_CHILD_PROPERTY (mq, bytes);
495 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
497 case PROP_MAX_SIZE_BUFFERS:
500 gint new_size = g_value_get_uint (value);
502 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
506 GstDataQueueSize size;
507 GstSingleQueue *q = (GstSingleQueue *) tmp->data;
508 gst_data_queue_get_level (q->queue, &size);
510 /* do not reduce max size below current level if the single queue has grown because of empty queue */
512 q->max_size.visible = new_size;
513 } else if (new_size > size.visible) {
514 q->max_size.visible = new_size;
516 tmp = g_list_next (tmp);
519 mq->max_size.visible = new_size;
521 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
525 case PROP_MAX_SIZE_TIME:
526 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
527 mq->max_size.time = g_value_get_uint64 (value);
528 SET_CHILD_PROPERTY (mq, time);
529 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
531 case PROP_EXTRA_SIZE_BYTES:
532 mq->extra_size.bytes = g_value_get_uint (value);
534 case PROP_EXTRA_SIZE_BUFFERS:
535 mq->extra_size.visible = g_value_get_uint (value);
537 case PROP_EXTRA_SIZE_TIME:
538 mq->extra_size.time = g_value_get_uint64 (value);
540 case PROP_USE_BUFFERING:
541 mq->use_buffering = g_value_get_boolean (value);
542 if (!mq->use_buffering && mq->buffering) {
545 mq->buffering = FALSE;
546 GST_DEBUG_OBJECT (mq, "buffering 100 percent");
547 message = gst_message_new_buffering (GST_OBJECT_CAST (mq), 100);
549 gst_element_post_message (GST_ELEMENT_CAST (mq), message);
552 case PROP_LOW_PERCENT:
553 mq->low_percent = g_value_get_int (value);
555 case PROP_HIGH_PERCENT:
556 mq->high_percent = g_value_get_int (value);
558 case PROP_SYNC_BY_RUNNING_TIME:
559 mq->sync_by_running_time = g_value_get_boolean (value);
562 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
568 gst_multi_queue_get_property (GObject * object, guint prop_id,
569 GValue * value, GParamSpec * pspec)
571 GstMultiQueue *mq = GST_MULTI_QUEUE (object);
573 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
576 case PROP_EXTRA_SIZE_BYTES:
577 g_value_set_uint (value, mq->extra_size.bytes);
579 case PROP_EXTRA_SIZE_BUFFERS:
580 g_value_set_uint (value, mq->extra_size.visible);
582 case PROP_EXTRA_SIZE_TIME:
583 g_value_set_uint64 (value, mq->extra_size.time);
585 case PROP_MAX_SIZE_BYTES:
586 g_value_set_uint (value, mq->max_size.bytes);
588 case PROP_MAX_SIZE_BUFFERS:
589 g_value_set_uint (value, mq->max_size.visible);
591 case PROP_MAX_SIZE_TIME:
592 g_value_set_uint64 (value, mq->max_size.time);
594 case PROP_USE_BUFFERING:
595 g_value_set_boolean (value, mq->use_buffering);
597 case PROP_LOW_PERCENT:
598 g_value_set_int (value, mq->low_percent);
600 case PROP_HIGH_PERCENT:
601 g_value_set_int (value, mq->high_percent);
603 case PROP_SYNC_BY_RUNNING_TIME:
604 g_value_set_boolean (value, mq->sync_by_running_time);
607 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
611 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
615 gst_multi_queue_iterate_internal_links (GstPad * pad, GstObject * parent)
617 GstIterator *it = NULL;
619 GstSingleQueue *squeue;
620 GstMultiQueue *mq = GST_MULTI_QUEUE (parent);
623 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
624 squeue = gst_pad_get_element_private (pad);
628 if (squeue->sinkpad == pad)
629 opad = gst_object_ref (squeue->srcpad);
630 else if (squeue->srcpad == pad)
631 opad = gst_object_ref (squeue->sinkpad);
635 g_value_init (&val, GST_TYPE_PAD);
636 g_value_set_object (&val, opad);
637 it = gst_iterator_new_single (GST_TYPE_PAD, &val);
638 g_value_unset (&val);
640 gst_object_unref (opad);
643 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
654 gst_multi_queue_request_new_pad (GstElement * element, GstPadTemplate * temp,
655 const gchar * name, const GstCaps * caps)
657 GstMultiQueue *mqueue = GST_MULTI_QUEUE (element);
658 GstSingleQueue *squeue;
662 sscanf (name + 4, "_%u", &temp_id);
663 GST_LOG_OBJECT (element, "name : %s (id %d)", GST_STR_NULL (name), temp_id);
666 /* Create a new single queue, add the sink and source pad and return the sink pad */
667 squeue = gst_single_queue_new (mqueue, temp_id);
669 GST_DEBUG_OBJECT (mqueue, "Returning pad %s:%s",
670 GST_DEBUG_PAD_NAME (squeue->sinkpad));
672 return squeue ? squeue->sinkpad : NULL;
676 gst_multi_queue_release_pad (GstElement * element, GstPad * pad)
678 GstMultiQueue *mqueue = GST_MULTI_QUEUE (element);
679 GstSingleQueue *sq = NULL;
682 GST_LOG_OBJECT (element, "pad %s:%s", GST_DEBUG_PAD_NAME (pad));
684 GST_MULTI_QUEUE_MUTEX_LOCK (mqueue);
685 /* Find which single queue it belongs to, knowing that it should be a sinkpad */
686 for (tmp = mqueue->queues; tmp; tmp = g_list_next (tmp)) {
687 sq = (GstSingleQueue *) tmp->data;
689 if (sq->sinkpad == pad)
694 GST_WARNING_OBJECT (mqueue, "That pad doesn't belong to this element ???");
695 GST_MULTI_QUEUE_MUTEX_UNLOCK (mqueue);
699 /* FIXME: The removal of the singlequeue should probably not happen until it
700 * finishes draining */
702 /* remove it from the list */
703 mqueue->queues = g_list_delete_link (mqueue->queues, tmp);
704 mqueue->queues_cookie++;
706 /* FIXME : recompute next-non-linked */
707 GST_MULTI_QUEUE_MUTEX_UNLOCK (mqueue);
709 /* delete SingleQueue */
710 gst_data_queue_set_flushing (sq->queue, TRUE);
712 gst_pad_set_active (sq->srcpad, FALSE);
713 gst_pad_set_active (sq->sinkpad, FALSE);
714 gst_pad_set_element_private (sq->srcpad, NULL);
715 gst_pad_set_element_private (sq->sinkpad, NULL);
716 gst_element_remove_pad (element, sq->srcpad);
717 gst_element_remove_pad (element, sq->sinkpad);
718 gst_single_queue_free (sq);
721 static GstStateChangeReturn
722 gst_multi_queue_change_state (GstElement * element, GstStateChange transition)
724 GstMultiQueue *mqueue = GST_MULTI_QUEUE (element);
725 GstSingleQueue *sq = NULL;
726 GstStateChangeReturn result;
728 switch (transition) {
729 case GST_STATE_CHANGE_READY_TO_PAUSED:{
732 /* Set all pads to non-flushing */
733 GST_MULTI_QUEUE_MUTEX_LOCK (mqueue);
734 for (tmp = mqueue->queues; tmp; tmp = g_list_next (tmp)) {
735 sq = (GstSingleQueue *) tmp->data;
736 sq->flushing = FALSE;
739 /* the visible limit might not have been set on single queues that have grown because of other queueus were empty */
740 SET_CHILD_PROPERTY (mqueue, visible);
742 GST_MULTI_QUEUE_MUTEX_UNLOCK (mqueue);
746 case GST_STATE_CHANGE_PAUSED_TO_READY:{
749 /* Un-wait all waiting pads */
750 GST_MULTI_QUEUE_MUTEX_LOCK (mqueue);
751 for (tmp = mqueue->queues; tmp; tmp = g_list_next (tmp)) {
752 sq = (GstSingleQueue *) tmp->data;
754 g_cond_signal (&sq->turn);
756 sq->last_query = FALSE;
757 g_cond_signal (&sq->query_handled);
759 GST_MULTI_QUEUE_MUTEX_UNLOCK (mqueue);
766 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
768 switch (transition) {
777 gst_single_queue_flush (GstMultiQueue * mq, GstSingleQueue * sq, gboolean flush,
782 GST_DEBUG_OBJECT (mq, "flush %s queue %d", (flush ? "start" : "stop"),
786 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
787 sq->srcresult = GST_FLOW_FLUSHING;
788 gst_data_queue_set_flushing (sq->queue, TRUE);
792 /* wake up non-linked task */
793 GST_LOG_OBJECT (mq, "SingleQueue %d : waking up eventually waiting task",
795 g_cond_signal (&sq->turn);
796 sq->last_query = FALSE;
797 g_cond_signal (&sq->query_handled);
798 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
800 GST_LOG_OBJECT (mq, "SingleQueue %d : pausing task", sq->id);
801 result = gst_pad_pause_task (sq->srcpad);
802 sq->sink_tainted = sq->src_tainted = TRUE;
804 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
805 gst_single_queue_flush_queue (sq, full);
806 gst_segment_init (&sq->sink_segment, GST_FORMAT_TIME);
807 gst_segment_init (&sq->src_segment, GST_FORMAT_TIME);
808 /* All pads start off not-linked for a smooth kick-off */
809 sq->srcresult = GST_FLOW_OK;
812 sq->max_size.visible = mq->max_size.visible;
816 sq->last_oldid = G_MAXUINT32;
817 sq->next_time = GST_CLOCK_TIME_NONE;
818 sq->last_time = GST_CLOCK_TIME_NONE;
819 gst_data_queue_set_flushing (sq->queue, FALSE);
821 /* Reset high time to be recomputed next */
822 mq->high_time = GST_CLOCK_TIME_NONE;
824 sq->flushing = FALSE;
825 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
827 GST_LOG_OBJECT (mq, "SingleQueue %d : starting task", sq->id);
829 gst_pad_start_task (sq->srcpad, (GstTaskFunction) gst_multi_queue_loop,
836 update_buffering (GstMultiQueue * mq, GstSingleQueue * sq)
838 GstDataQueueSize size;
840 gboolean post = FALSE;
842 /* nothing to dowhen we are not in buffering mode */
843 if (!mq->use_buffering)
846 gst_data_queue_get_level (sq->queue, &size);
848 GST_DEBUG_OBJECT (mq,
849 "queue %d: visible %u/%u, bytes %u/%u, time %" G_GUINT64_FORMAT "/%"
850 G_GUINT64_FORMAT, sq->id, size.visible, sq->max_size.visible,
851 size.bytes, sq->max_size.bytes, sq->cur_time, sq->max_size.time);
853 /* get bytes and time percentages and take the max */
854 if (sq->is_eos || sq->srcresult == GST_FLOW_NOT_LINKED) {
858 if (sq->max_size.time > 0) {
859 tmp = (sq->cur_time * 100) / sq->max_size.time;
860 percent = MAX (percent, tmp);
862 if (sq->max_size.bytes > 0) {
863 tmp = (size.bytes * 100) / sq->max_size.bytes;
864 percent = MAX (percent, tmp);
870 if (percent >= mq->high_percent) {
871 mq->buffering = FALSE;
873 /* make sure it increases */
874 percent = MAX (mq->percent, percent);
876 if (percent == mq->percent)
877 /* don't post if nothing changed */
880 /* else keep last value we posted */
881 mq->percent = percent;
883 if (percent < mq->low_percent) {
884 mq->buffering = TRUE;
885 mq->percent = percent;
892 /* scale to high percent so that it becomes the 100% mark */
893 percent = percent * 100 / mq->high_percent;
898 GST_DEBUG_OBJECT (mq, "buffering %d percent", percent);
899 message = gst_message_new_buffering (GST_OBJECT_CAST (mq), percent);
901 gst_element_post_message (GST_ELEMENT_CAST (mq), message);
903 GST_DEBUG_OBJECT (mq, "filled %d percent", percent);
907 /* calculate the diff between running time on the sink and src of the queue.
908 * This is the total amount of time in the queue.
911 update_time_level (GstMultiQueue * mq, GstSingleQueue * sq)
913 gint64 sink_time, src_time;
915 if (sq->sink_tainted) {
916 sink_time = sq->sinktime =
917 gst_segment_to_running_time (&sq->sink_segment, GST_FORMAT_TIME,
918 sq->sink_segment.position);
920 if (G_UNLIKELY (sink_time != GST_CLOCK_TIME_NONE))
921 /* if we have a time, we become untainted and use the time */
922 sq->sink_tainted = FALSE;
924 sink_time = sq->sinktime;
926 if (sq->src_tainted) {
927 src_time = sq->srctime =
928 gst_segment_to_running_time (&sq->src_segment, GST_FORMAT_TIME,
929 sq->src_segment.position);
930 /* if we have a time, we become untainted and use the time */
931 if (G_UNLIKELY (src_time != GST_CLOCK_TIME_NONE))
932 sq->src_tainted = FALSE;
934 src_time = sq->srctime;
936 GST_DEBUG_OBJECT (mq,
937 "queue %d, sink %" GST_TIME_FORMAT ", src %" GST_TIME_FORMAT, sq->id,
938 GST_TIME_ARGS (sink_time), GST_TIME_ARGS (src_time));
940 /* This allows for streams with out of order timestamping - sometimes the
941 * emerging timestamp is later than the arriving one(s) */
942 if (G_LIKELY (sink_time != -1 && src_time != -1 && sink_time > src_time))
943 sq->cur_time = sink_time - src_time;
947 /* updating the time level can change the buffering state */
948 update_buffering (mq, sq);
953 /* take a SEGMENT event and apply the values to segment, updating the time
956 apply_segment (GstMultiQueue * mq, GstSingleQueue * sq, GstEvent * event,
957 GstSegment * segment)
959 gst_event_copy_segment (event, segment);
961 /* now configure the values, we use these to track timestamps on the
963 if (segment->format != GST_FORMAT_TIME) {
964 /* non-time format, pretent the current time segment is closed with a
965 * 0 start and unknown stop time. */
966 segment->format = GST_FORMAT_TIME;
971 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
973 if (segment == &sq->sink_segment)
974 sq->sink_tainted = TRUE;
976 sq->src_tainted = TRUE;
978 GST_DEBUG_OBJECT (mq,
979 "queue %d, configured SEGMENT %" GST_SEGMENT_FORMAT, sq->id, segment);
981 /* segment can update the time level of the queue */
982 update_time_level (mq, sq);
984 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
987 /* take a buffer and update segment, updating the time level of the queue. */
989 apply_buffer (GstMultiQueue * mq, GstSingleQueue * sq, GstClockTime timestamp,
990 GstClockTime duration, GstSegment * segment)
992 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
994 /* if no timestamp is set, assume it's continuous with the previous
996 if (timestamp == GST_CLOCK_TIME_NONE)
997 timestamp = segment->position;
1000 if (duration != GST_CLOCK_TIME_NONE)
1001 timestamp += duration;
1003 GST_DEBUG_OBJECT (mq, "queue %d, position updated to %" GST_TIME_FORMAT,
1004 sq->id, GST_TIME_ARGS (timestamp));
1006 segment->position = timestamp;
1008 if (segment == &sq->sink_segment)
1009 sq->sink_tainted = TRUE;
1011 sq->src_tainted = TRUE;
1013 /* calc diff with other end */
1014 update_time_level (mq, sq);
1015 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
1019 get_running_time (GstSegment * segment, GstMiniObject * object, gboolean end)
1021 GstClockTime time = GST_CLOCK_TIME_NONE;
1023 if (GST_IS_BUFFER (object)) {
1024 GstBuffer *buf = GST_BUFFER_CAST (object);
1026 if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
1027 time = GST_BUFFER_TIMESTAMP (buf);
1028 if (end && GST_BUFFER_DURATION_IS_VALID (buf))
1029 time += GST_BUFFER_DURATION (buf);
1030 if (time > segment->stop)
1031 time = segment->stop;
1032 time = gst_segment_to_running_time (segment, GST_FORMAT_TIME, time);
1034 } else if (GST_IS_BUFFER_LIST (object)) {
1035 GstBufferList *list = GST_BUFFER_LIST_CAST (object);
1039 n = gst_buffer_list_length (list);
1040 for (i = 0; i < n; i++) {
1041 buf = gst_buffer_list_get (list, i);
1042 if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
1043 time = GST_BUFFER_TIMESTAMP (buf);
1044 if (end && GST_BUFFER_DURATION_IS_VALID (buf))
1045 time += GST_BUFFER_DURATION (buf);
1046 if (time > segment->stop)
1047 time = segment->stop;
1048 time = gst_segment_to_running_time (segment, GST_FORMAT_TIME, time);
1055 } else if (GST_IS_EVENT (object)) {
1056 GstEvent *event = GST_EVENT_CAST (object);
1058 /* For newsegment events return the running time of the start position */
1059 if (GST_EVENT_TYPE (event) == GST_EVENT_SEGMENT) {
1060 const GstSegment *new_segment;
1062 gst_event_parse_segment (event, &new_segment);
1063 if (new_segment->format == GST_FORMAT_TIME) {
1065 gst_segment_to_running_time (new_segment, GST_FORMAT_TIME,
1066 new_segment->start);
1075 static GstFlowReturn
1076 gst_single_queue_push_one (GstMultiQueue * mq, GstSingleQueue * sq,
1077 GstMiniObject * object)
1079 GstFlowReturn result = sq->srcresult;
1081 if (GST_IS_BUFFER (object)) {
1083 GstClockTime timestamp, duration;
1085 buffer = GST_BUFFER_CAST (object);
1086 timestamp = GST_BUFFER_TIMESTAMP (buffer);
1087 duration = GST_BUFFER_DURATION (buffer);
1089 apply_buffer (mq, sq, timestamp, duration, &sq->src_segment);
1091 /* Applying the buffer may have made the queue non-full again, unblock it if needed */
1092 gst_data_queue_limits_changed (sq->queue);
1094 GST_DEBUG_OBJECT (mq,
1095 "SingleQueue %d : Pushing buffer %p with ts %" GST_TIME_FORMAT,
1096 sq->id, buffer, GST_TIME_ARGS (timestamp));
1098 result = gst_pad_push (sq->srcpad, buffer);
1099 } else if (GST_IS_EVENT (object)) {
1102 event = GST_EVENT_CAST (object);
1104 switch (GST_EVENT_TYPE (event)) {
1106 result = GST_FLOW_EOS;
1108 case GST_EVENT_SEGMENT:
1109 apply_segment (mq, sq, event, &sq->src_segment);
1110 /* Applying the segment may have made the queue non-full again, unblock it if needed */
1111 gst_data_queue_limits_changed (sq->queue);
1117 GST_DEBUG_OBJECT (mq,
1118 "SingleQueue %d : Pushing event %p of type %s",
1119 sq->id, event, GST_EVENT_TYPE_NAME (event));
1121 gst_pad_push_event (sq->srcpad, event);
1122 } else if (GST_IS_QUERY (object)) {
1126 query = GST_QUERY_CAST (object);
1128 res = gst_pad_peer_query (sq->srcpad, query);
1130 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
1131 sq->last_query = res;
1132 g_cond_signal (&sq->query_handled);
1133 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
1135 g_warning ("Unexpected object in singlequeue %u (refcounting problem?)",
1143 static GstMiniObject *
1144 gst_multi_queue_item_steal_object (GstMultiQueueItem * item)
1149 item->object = NULL;
1155 gst_multi_queue_item_destroy (GstMultiQueueItem * item)
1157 if (!item->is_query && item->object)
1158 gst_mini_object_unref (item->object);
1159 g_slice_free (GstMultiQueueItem, item);
1162 /* takes ownership of passed mini object! */
1163 static GstMultiQueueItem *
1164 gst_multi_queue_buffer_item_new (GstMiniObject * object, guint32 curid)
1166 GstMultiQueueItem *item;
1168 item = g_slice_new (GstMultiQueueItem);
1169 item->object = object;
1170 item->destroy = (GDestroyNotify) gst_multi_queue_item_destroy;
1171 item->posid = curid;
1172 item->is_query = GST_IS_QUERY (object);
1174 item->size = gst_buffer_get_size (GST_BUFFER_CAST (object));
1175 item->duration = GST_BUFFER_DURATION (object);
1176 if (item->duration == GST_CLOCK_TIME_NONE)
1178 item->visible = TRUE;
1182 static GstMultiQueueItem *
1183 gst_multi_queue_mo_item_new (GstMiniObject * object, guint32 curid)
1185 GstMultiQueueItem *item;
1187 item = g_slice_new (GstMultiQueueItem);
1188 item->object = object;
1189 item->destroy = (GDestroyNotify) gst_multi_queue_item_destroy;
1190 item->posid = curid;
1191 item->is_query = GST_IS_QUERY (object);
1195 item->visible = FALSE;
1199 /* Each main loop attempts to push buffers until the return value
1200 * is not-linked. not-linked pads are not allowed to push data beyond
1201 * any linked pads, so they don't 'rush ahead of the pack'.
1204 gst_multi_queue_loop (GstPad * pad)
1207 GstMultiQueueItem *item;
1208 GstDataQueueItem *sitem;
1210 GstMiniObject *object = NULL;
1212 GstFlowReturn result;
1213 GstClockTime next_time;
1215 gboolean do_update_buffering = FALSE;
1217 sq = (GstSingleQueue *) gst_pad_get_element_private (pad);
1220 GST_DEBUG_OBJECT (mq, "SingleQueue %d : trying to pop an object", sq->id);
1225 /* Get something from the queue, blocking until that happens, or we get
1227 if (!(gst_data_queue_pop (sq->queue, &sitem)))
1230 item = (GstMultiQueueItem *) sitem;
1231 newid = item->posid;
1233 /* steal the object and destroy the item */
1234 object = gst_multi_queue_item_steal_object (item);
1235 gst_multi_queue_item_destroy (item);
1237 is_buffer = GST_IS_BUFFER (object);
1239 /* Get running time of the item. Events will have GST_CLOCK_TIME_NONE */
1240 next_time = get_running_time (&sq->src_segment, object, TRUE);
1242 GST_LOG_OBJECT (mq, "SingleQueue %d : newid:%d , oldid:%d",
1243 sq->id, newid, sq->last_oldid);
1245 /* If we're not-linked, we do some extra work because we might need to
1246 * wait before pushing. If we're linked but there's a gap in the IDs,
1247 * or it's the first loop, or we just passed the previous highid,
1248 * we might need to wake some sleeping pad up, so there's extra work
1250 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
1251 if (sq->srcresult == GST_FLOW_NOT_LINKED
1252 || (sq->last_oldid == G_MAXUINT32) || (newid != (sq->last_oldid + 1))
1253 || sq->last_oldid > mq->highid) {
1254 GST_LOG_OBJECT (mq, "CHECKING sq->srcresult: %s",
1255 gst_flow_get_name (sq->srcresult));
1257 /* Check again if we're flushing after the lock is taken,
1258 * the flush flag might have been changed in the meantime */
1260 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
1264 /* Update the nextid so other threads know when to wake us up */
1266 sq->next_time = next_time;
1268 /* Update the oldid (the last ID we output) for highid tracking */
1269 if (sq->last_oldid != G_MAXUINT32)
1270 sq->oldid = sq->last_oldid;
1272 if (sq->srcresult == GST_FLOW_NOT_LINKED) {
1273 /* Go to sleep until it's time to push this buffer */
1275 /* Recompute the highid */
1276 compute_high_id (mq);
1277 /* Recompute the high time */
1278 compute_high_time (mq);
1280 while (((mq->sync_by_running_time && next_time != GST_CLOCK_TIME_NONE &&
1281 (mq->high_time == GST_CLOCK_TIME_NONE
1282 || next_time >= mq->high_time))
1283 || (!mq->sync_by_running_time && newid > mq->highid))
1284 && sq->srcresult == GST_FLOW_NOT_LINKED) {
1286 GST_DEBUG_OBJECT (mq,
1287 "queue %d sleeping for not-linked wakeup with "
1288 "newid %u, highid %u, next_time %" GST_TIME_FORMAT
1289 ", high_time %" GST_TIME_FORMAT, sq->id, newid, mq->highid,
1290 GST_TIME_ARGS (next_time), GST_TIME_ARGS (mq->high_time));
1292 /* Wake up all non-linked pads before we sleep */
1293 wake_up_next_non_linked (mq);
1296 g_cond_wait (&sq->turn, &mq->qlock);
1300 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
1304 /* Recompute the high time */
1305 compute_high_time (mq);
1307 GST_DEBUG_OBJECT (mq, "queue %d woken from sleeping for not-linked "
1308 "wakeup with newid %u, highid %u, next_time %" GST_TIME_FORMAT
1309 ", high_time %" GST_TIME_FORMAT, sq->id, newid, mq->highid,
1310 GST_TIME_ARGS (next_time), GST_TIME_ARGS (mq->high_time));
1313 /* Re-compute the high_id in case someone else pushed */
1314 compute_high_id (mq);
1316 compute_high_id (mq);
1317 /* Wake up all non-linked pads */
1318 wake_up_next_non_linked (mq);
1320 /* We're done waiting, we can clear the nextid and nexttime */
1322 sq->next_time = GST_CLOCK_TIME_NONE;
1324 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
1329 GST_LOG_OBJECT (mq, "BEFORE PUSHING sq->srcresult: %s",
1330 gst_flow_get_name (sq->srcresult));
1332 /* Update time stats */
1333 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
1334 next_time = get_running_time (&sq->src_segment, object, FALSE);
1335 if (next_time != GST_CLOCK_TIME_NONE) {
1336 if (sq->last_time == GST_CLOCK_TIME_NONE || sq->last_time < next_time)
1337 sq->last_time = next_time;
1338 if (mq->high_time == GST_CLOCK_TIME_NONE || mq->high_time <= next_time) {
1339 /* Wake up all non-linked pads now that we advanced the high time */
1340 mq->high_time = next_time;
1341 wake_up_next_non_linked (mq);
1344 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
1346 /* Try to push out the new object */
1347 result = gst_single_queue_push_one (mq, sq, object);
1350 /* Check if we pushed something already and if this is
1351 * now a switch from an active to a non-active stream.
1353 * If it is, we reset all the waiting streams, let them
1354 * push another buffer to see if they're now active again.
1355 * This allows faster switching between streams and prevents
1356 * deadlocks if downstream does any waiting too.
1358 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
1359 if (sq->pushed && sq->srcresult == GST_FLOW_OK
1360 && result == GST_FLOW_NOT_LINKED) {
1363 GST_LOG_OBJECT (mq, "SingleQueue %d : Changed from active to non-active",
1366 compute_high_id (mq);
1367 do_update_buffering = TRUE;
1369 /* maybe no-one is waiting */
1370 if (mq->numwaiting > 0) {
1371 /* Else figure out which singlequeue(s) need waking up */
1372 for (tmp = mq->queues; tmp; tmp = g_list_next (tmp)) {
1373 GstSingleQueue *sq2 = (GstSingleQueue *) tmp->data;
1375 if (sq2->srcresult == GST_FLOW_NOT_LINKED) {
1376 GST_LOG_OBJECT (mq, "Waking up singlequeue %d", sq2->id);
1377 sq2->pushed = FALSE;
1378 sq2->srcresult = GST_FLOW_OK;
1379 g_cond_signal (&sq2->turn);
1387 sq->srcresult = result;
1388 sq->last_oldid = newid;
1390 if (do_update_buffering)
1391 update_buffering (mq, sq);
1393 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
1395 if (result != GST_FLOW_OK && result != GST_FLOW_NOT_LINKED
1396 && result != GST_FLOW_EOS)
1399 GST_LOG_OBJECT (mq, "AFTER PUSHING sq->srcresult: %s",
1400 gst_flow_get_name (sq->srcresult));
1407 gst_mini_object_unref (object);
1409 /* Need to make sure wake up any sleeping pads when we exit */
1410 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
1411 compute_high_time (mq);
1412 compute_high_id (mq);
1413 wake_up_next_non_linked (mq);
1414 sq->last_query = FALSE;
1415 g_cond_signal (&sq->query_handled);
1416 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
1418 /* upstream needs to see fatal result ASAP to shut things down,
1419 * but might be stuck in one of our other full queues;
1420 * so empty this one and trigger dynamic queue growth. At
1421 * this point the srcresult is not OK, NOT_LINKED
1422 * or EOS, i.e. a real failure */
1423 gst_single_queue_flush_queue (sq, FALSE);
1424 single_queue_underrun_cb (sq->queue, sq);
1425 gst_data_queue_set_flushing (sq->queue, TRUE);
1426 gst_pad_pause_task (sq->srcpad);
1427 GST_CAT_LOG_OBJECT (multi_queue_debug, mq,
1428 "SingleQueue[%d] task paused, reason:%s",
1429 sq->id, gst_flow_get_name (sq->srcresult));
1435 * gst_multi_queue_chain:
1437 * This is similar to GstQueue's chain function, except:
1438 * _ we don't have leak behaviours,
1439 * _ we push with a unique id (curid)
1441 static GstFlowReturn
1442 gst_multi_queue_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
1446 GstMultiQueueItem *item;
1448 GstClockTime timestamp, duration;
1450 sq = gst_pad_get_element_private (pad);
1453 /* if eos, we are always full, so avoid hanging incoming indefinitely */
1457 /* Get a unique incrementing id */
1458 curid = g_atomic_int_add ((gint *) & mq->counter, 1);
1460 GST_LOG_OBJECT (mq, "SingleQueue %d : about to enqueue buffer %p with id %d",
1461 sq->id, buffer, curid);
1463 item = gst_multi_queue_buffer_item_new (GST_MINI_OBJECT_CAST (buffer), curid);
1465 timestamp = GST_BUFFER_TIMESTAMP (buffer);
1466 duration = GST_BUFFER_DURATION (buffer);
1468 if (!(gst_data_queue_push (sq->queue, (GstDataQueueItem *) item)))
1471 /* update time level, we must do this after pushing the data in the queue so
1472 * that we never end up filling the queue first. */
1473 apply_buffer (mq, sq, timestamp, duration, &sq->sink_segment);
1476 return sq->srcresult;
1481 GST_LOG_OBJECT (mq, "SingleQueue %d : exit because task paused, reason: %s",
1482 sq->id, gst_flow_get_name (sq->srcresult));
1483 gst_multi_queue_item_destroy (item);
1488 GST_DEBUG_OBJECT (mq, "we are EOS, dropping buffer, return EOS");
1489 gst_buffer_unref (buffer);
1490 return GST_FLOW_EOS;
1495 gst_multi_queue_sink_activate_mode (GstPad * pad, GstObject * parent,
1496 GstPadMode mode, gboolean active)
1502 sq = (GstSingleQueue *) gst_pad_get_element_private (pad);
1503 mq = (GstMultiQueue *) gst_pad_get_parent (pad);
1505 /* mq is NULL if the pad is activated/deactivated before being
1506 * added to the multiqueue */
1508 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
1511 case GST_PAD_MODE_PUSH:
1513 /* All pads start off linked until they push one buffer */
1514 sq->srcresult = GST_FLOW_OK;
1516 gst_data_queue_set_flushing (sq->queue, FALSE);
1518 sq->srcresult = GST_FLOW_FLUSHING;
1519 sq->last_query = FALSE;
1520 g_cond_signal (&sq->query_handled);
1521 gst_data_queue_set_flushing (sq->queue, TRUE);
1523 /* Wait until streaming thread has finished */
1525 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
1526 GST_PAD_STREAM_LOCK (pad);
1528 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
1529 gst_data_queue_flush (sq->queue);
1531 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
1532 GST_PAD_STREAM_UNLOCK (pad);
1534 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
1544 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
1545 gst_object_unref (mq);
1552 gst_multi_queue_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
1557 GstMultiQueueItem *item;
1560 GstEvent *sref = NULL;
1562 sq = (GstSingleQueue *) gst_pad_get_element_private (pad);
1563 mq = (GstMultiQueue *) parent;
1565 type = GST_EVENT_TYPE (event);
1568 case GST_EVENT_FLUSH_START:
1569 GST_DEBUG_OBJECT (mq, "SingleQueue %d : received flush start event",
1572 res = gst_pad_push_event (sq->srcpad, event);
1574 gst_single_queue_flush (mq, sq, TRUE, FALSE);
1577 case GST_EVENT_FLUSH_STOP:
1578 GST_DEBUG_OBJECT (mq, "SingleQueue %d : received flush stop event",
1581 res = gst_pad_push_event (sq->srcpad, event);
1583 gst_single_queue_flush (mq, sq, FALSE, FALSE);
1585 case GST_EVENT_SEGMENT:
1586 /* take ref because the queue will take ownership and we need the event
1587 * afterwards to update the segment */
1588 sref = gst_event_ref (event);
1592 if (!(GST_EVENT_IS_SERIALIZED (event))) {
1593 res = gst_pad_push_event (sq->srcpad, event);
1599 /* if eos, we are always full, so avoid hanging incoming indefinitely */
1603 /* Get an unique incrementing id. */
1604 curid = g_atomic_int_add ((gint *) & mq->counter, 1);
1606 item = gst_multi_queue_mo_item_new ((GstMiniObject *) event, curid);
1608 GST_DEBUG_OBJECT (mq,
1609 "SingleQueue %d : Enqueuing event %p of type %s with id %d",
1610 sq->id, event, GST_EVENT_TYPE_NAME (event), curid);
1612 if (!(res = gst_data_queue_push (sq->queue, (GstDataQueueItem *) item)))
1615 /* mark EOS when we received one, we must do that after putting the
1616 * buffer in the queue because EOS marks the buffer as filled. No need to take
1617 * a lock, the _check_full happens from this thread only, right before pushing
1618 * into dataqueue. */
1622 /* EOS affects the buffering state */
1623 update_buffering (mq, sq);
1624 single_queue_overrun_cb (sq->queue, sq);
1626 case GST_EVENT_SEGMENT:
1627 apply_segment (mq, sq, sref, &sq->sink_segment);
1628 gst_event_unref (sref);
1638 GST_LOG_OBJECT (mq, "SingleQueue %d : exit because task paused, reason: %s",
1639 sq->id, gst_flow_get_name (sq->srcresult));
1641 gst_event_unref (sref);
1642 gst_multi_queue_item_destroy (item);
1647 GST_DEBUG_OBJECT (mq, "we are EOS, dropping event, return FALSE");
1648 gst_event_unref (event);
1655 gst_multi_queue_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
1661 sq = (GstSingleQueue *) gst_pad_get_element_private (pad);
1662 mq = (GstMultiQueue *) parent;
1664 switch (GST_QUERY_TYPE (query)) {
1666 if (GST_QUERY_IS_SERIALIZED (query)) {
1668 GstMultiQueueItem *item;
1670 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
1671 if (sq->srcresult != GST_FLOW_OK)
1674 /* serialized events go in the queue. We need to be certain that we
1675 * don't cause deadlocks waiting for the query return value. We check if
1676 * the queue is empty (nothing is blocking downstream and the query can
1677 * be pushed for sure) or we are not buffering. If we are buffering,
1678 * the pipeline waits to unblock downstream until our queue fills up
1679 * completely, which can not happen if we block on the query..
1680 * Therefore we only potentially block when we are not buffering. */
1681 if (!mq->use_buffering || gst_data_queue_is_empty (sq->queue)) {
1682 /* Get an unique incrementing id. */
1683 curid = g_atomic_int_add ((gint *) & mq->counter, 1);
1685 item = gst_multi_queue_mo_item_new ((GstMiniObject *) query, curid);
1687 GST_DEBUG_OBJECT (mq,
1688 "SingleQueue %d : Enqueuing query %p of type %s with id %d",
1689 sq->id, query, GST_QUERY_TYPE_NAME (query), curid);
1690 res = gst_data_queue_push (sq->queue, (GstDataQueueItem *) item);
1691 g_cond_wait (&sq->query_handled, &mq->qlock);
1692 res = sq->last_query;
1694 GST_DEBUG_OBJECT (mq, "refusing query, we are buffering and the "
1695 "queue is not empty");
1698 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
1700 /* default handling */
1701 res = gst_pad_query_default (pad, parent, query);
1709 GST_DEBUG_OBJECT (mq, "Flushing");
1710 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
1716 gst_multi_queue_src_activate_mode (GstPad * pad, GstObject * parent,
1717 GstPadMode mode, gboolean active)
1723 sq = (GstSingleQueue *) gst_pad_get_element_private (pad);
1726 GST_DEBUG_OBJECT (mq, "SingleQueue %d", sq->id);
1729 case GST_PAD_MODE_PUSH:
1731 result = gst_single_queue_flush (mq, sq, FALSE, TRUE);
1733 result = gst_single_queue_flush (mq, sq, TRUE, TRUE);
1734 /* make sure streaming finishes */
1735 result |= gst_pad_stop_task (pad);
1746 gst_multi_queue_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
1748 GstSingleQueue *sq = gst_pad_get_element_private (pad);
1749 GstMultiQueue *mq = sq->mqueue;
1752 switch (GST_EVENT_TYPE (event)) {
1753 case GST_EVENT_RECONFIGURE:
1754 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
1755 if (sq->srcresult == GST_FLOW_NOT_LINKED) {
1756 sq->srcresult = GST_FLOW_OK;
1757 g_cond_signal (&sq->turn);
1759 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
1761 ret = gst_pad_push_event (sq->sinkpad, event);
1764 ret = gst_pad_push_event (sq->sinkpad, event);
1772 gst_multi_queue_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
1776 /* FIXME, Handle position offset depending on queue size */
1777 switch (GST_QUERY_TYPE (query)) {
1779 /* default handling */
1780 res = gst_pad_query_default (pad, parent, query);
1787 * Next-non-linked functions
1790 /* WITH LOCK TAKEN */
1792 wake_up_next_non_linked (GstMultiQueue * mq)
1796 /* maybe no-one is waiting */
1797 if (mq->numwaiting < 1)
1800 /* Else figure out which singlequeue(s) need waking up */
1801 for (tmp = mq->queues; tmp; tmp = g_list_next (tmp)) {
1802 GstSingleQueue *sq = (GstSingleQueue *) tmp->data;
1804 if (sq->srcresult == GST_FLOW_NOT_LINKED) {
1805 if ((mq->sync_by_running_time && mq->high_time != GST_CLOCK_TIME_NONE
1806 && sq->next_time != GST_CLOCK_TIME_NONE
1807 && sq->next_time >= mq->high_time)
1808 || (sq->nextid != 0 && sq->nextid <= mq->highid)) {
1809 GST_LOG_OBJECT (mq, "Waking up singlequeue %d", sq->id);
1810 g_cond_signal (&sq->turn);
1816 /* WITH LOCK TAKEN */
1818 compute_high_id (GstMultiQueue * mq)
1820 /* The high-id is either the highest id among the linked pads, or if all
1821 * pads are not-linked, it's the lowest not-linked pad */
1823 guint32 lowest = G_MAXUINT32;
1824 guint32 highid = G_MAXUINT32;
1826 for (tmp = mq->queues; tmp; tmp = g_list_next (tmp)) {
1827 GstSingleQueue *sq = (GstSingleQueue *) tmp->data;
1829 GST_LOG_OBJECT (mq, "inspecting sq:%d , nextid:%d, oldid:%d, srcresult:%s",
1830 sq->id, sq->nextid, sq->oldid, gst_flow_get_name (sq->srcresult));
1832 if (sq->srcresult == GST_FLOW_NOT_LINKED) {
1833 /* No need to consider queues which are not waiting */
1834 if (sq->nextid == 0) {
1835 GST_LOG_OBJECT (mq, "sq:%d is not waiting - ignoring", sq->id);
1839 if (sq->nextid < lowest)
1840 lowest = sq->nextid;
1841 } else if (sq->srcresult != GST_FLOW_EOS) {
1842 /* If we don't have a global highid, or the global highid is lower than
1843 * this single queue's last outputted id, store the queue's one,
1844 * unless the singlequeue is at EOS (srcresult = EOS) */
1845 if ((highid == G_MAXUINT32) || (sq->oldid > highid))
1850 if (highid == G_MAXUINT32 || lowest < highid)
1851 mq->highid = lowest;
1853 mq->highid = highid;
1855 GST_LOG_OBJECT (mq, "Highid is now : %u, lowest non-linked %u", mq->highid,
1859 /* WITH LOCK TAKEN */
1861 compute_high_time (GstMultiQueue * mq)
1863 /* The high-id is either the highest id among the linked pads, or if all
1864 * pads are not-linked, it's the lowest not-linked pad */
1866 GstClockTime highest = GST_CLOCK_TIME_NONE;
1867 GstClockTime lowest = GST_CLOCK_TIME_NONE;
1869 for (tmp = mq->queues; tmp; tmp = g_list_next (tmp)) {
1870 GstSingleQueue *sq = (GstSingleQueue *) tmp->data;
1873 "inspecting sq:%d , next_time:%" GST_TIME_FORMAT ", last_time:%"
1874 GST_TIME_FORMAT ", srcresult:%s", sq->id, GST_TIME_ARGS (sq->next_time),
1875 GST_TIME_ARGS (sq->last_time), gst_flow_get_name (sq->srcresult));
1877 if (sq->srcresult == GST_FLOW_NOT_LINKED) {
1878 /* No need to consider queues which are not waiting */
1879 if (sq->next_time == GST_CLOCK_TIME_NONE) {
1880 GST_LOG_OBJECT (mq, "sq:%d is not waiting - ignoring", sq->id);
1884 if (lowest == GST_CLOCK_TIME_NONE || sq->next_time < lowest)
1885 lowest = sq->next_time;
1886 } else if (sq->srcresult != GST_FLOW_EOS) {
1887 /* If we don't have a global highid, or the global highid is lower than
1888 * this single queue's last outputted id, store the queue's one,
1889 * unless the singlequeue is at EOS (srcresult = EOS) */
1890 if (highest == GST_CLOCK_TIME_NONE || sq->last_time > highest)
1891 highest = sq->last_time;
1895 mq->high_time = highest;
1898 "High time is now : %" GST_TIME_FORMAT ", lowest non-linked %"
1899 GST_TIME_FORMAT, GST_TIME_ARGS (mq->high_time), GST_TIME_ARGS (lowest));
1902 #define IS_FILLED(q, format, value) (((q)->max_size.format) != 0 && \
1903 ((q)->max_size.format) <= (value))
1906 * GstSingleQueue functions
1909 single_queue_overrun_cb (GstDataQueue * dq, GstSingleQueue * sq)
1911 GstMultiQueue *mq = sq->mqueue;
1913 GstDataQueueSize size;
1914 gboolean filled = TRUE;
1915 gboolean all_not_linked = TRUE;
1916 gboolean empty_found = FALSE;
1918 gst_data_queue_get_level (sq->queue, &size);
1921 "Single Queue %d: EOS %d, visible %u/%u, bytes %u/%u, time %"
1922 G_GUINT64_FORMAT "/%" G_GUINT64_FORMAT, sq->id, sq->is_eos, size.visible,
1923 sq->max_size.visible, size.bytes, sq->max_size.bytes, sq->cur_time,
1926 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
1928 /* check if we reached the hard time/bytes limits */
1929 if (sq->is_eos || IS_FILLED (sq, bytes, size.bytes) ||
1930 IS_FILLED (sq, time, sq->cur_time)) {
1934 /* Search for empty or unlinked queues */
1935 for (tmp = mq->queues; tmp; tmp = g_list_next (tmp)) {
1936 GstSingleQueue *oq = (GstSingleQueue *) tmp->data;
1941 if (oq->srcresult == GST_FLOW_NOT_LINKED) {
1942 GST_LOG_OBJECT (mq, "Queue %d is not-linked", oq->id);
1946 all_not_linked = FALSE;
1947 GST_LOG_OBJECT (mq, "Checking Queue %d", oq->id);
1948 if (gst_data_queue_is_empty (oq->queue)) {
1949 GST_LOG_OBJECT (mq, "Queue %d is empty", oq->id);
1955 if (!mq->queues || !mq->queues->next)
1956 all_not_linked = FALSE;
1958 /* if hard limits are not reached then we allow one more buffer in the full
1959 * queue, but only if any of the other singelqueues are empty or all are
1961 if (all_not_linked || empty_found) {
1962 if (all_not_linked) {
1963 GST_LOG_OBJECT (mq, "All other queues are not linked");
1965 if (IS_FILLED (sq, visible, size.visible)) {
1966 sq->max_size.visible = size.visible + 1;
1967 GST_DEBUG_OBJECT (mq,
1968 "Bumping single queue %d max visible to %d",
1969 sq->id, sq->max_size.visible);
1975 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
1977 /* Overrun is always forwarded, since this is blocking the upstream element */
1979 GST_DEBUG_OBJECT (mq, "Queue %d is filled, signalling overrun", sq->id);
1980 g_signal_emit (mq, gst_multi_queue_signals[SIGNAL_OVERRUN], 0);
1985 single_queue_underrun_cb (GstDataQueue * dq, GstSingleQueue * sq)
1987 gboolean empty = TRUE;
1988 GstMultiQueue *mq = sq->mqueue;
1991 if (sq->srcresult == GST_FLOW_NOT_LINKED) {
1992 GST_LOG_OBJECT (mq, "Single Queue %d is empty but not-linked", sq->id);
1996 "Single Queue %d is empty, Checking other single queues", sq->id);
1999 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
2000 for (tmp = mq->queues; tmp; tmp = g_list_next (tmp)) {
2001 GstSingleQueue *oq = (GstSingleQueue *) tmp->data;
2003 if (gst_data_queue_is_full (oq->queue)) {
2004 GstDataQueueSize size;
2006 gst_data_queue_get_level (oq->queue, &size);
2007 if (IS_FILLED (oq, visible, size.visible)) {
2008 oq->max_size.visible = size.visible + 1;
2009 GST_DEBUG_OBJECT (mq,
2010 "queue %d is filled, bumping its max visible to %d", oq->id,
2011 oq->max_size.visible);
2012 gst_data_queue_limits_changed (oq->queue);
2015 if (!gst_data_queue_is_empty (oq->queue))
2018 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
2021 GST_DEBUG_OBJECT (mq, "All queues are empty, signalling it");
2022 g_signal_emit (mq, gst_multi_queue_signals[SIGNAL_UNDERRUN], 0);
2027 single_queue_check_full (GstDataQueue * dataq, guint visible, guint bytes,
2028 guint64 time, GstSingleQueue * sq)
2031 GstMultiQueue *mq = sq->mqueue;
2033 GST_DEBUG_OBJECT (mq,
2034 "queue %d: visible %u/%u, bytes %u/%u, time %" G_GUINT64_FORMAT "/%"
2035 G_GUINT64_FORMAT, sq->id, visible, sq->max_size.visible, bytes,
2036 sq->max_size.bytes, sq->cur_time, sq->max_size.time);
2038 /* we are always filled on EOS */
2042 /* we never go past the max visible items unless we are in buffering mode */
2043 if (!mq->use_buffering && IS_FILLED (sq, visible, visible))
2046 /* check time or bytes */
2047 res = IS_FILLED (sq, time, sq->cur_time) || IS_FILLED (sq, bytes, bytes);
2053 gst_single_queue_flush_queue (GstSingleQueue * sq, gboolean full)
2055 GstDataQueueItem *sitem;
2056 GstMultiQueueItem *mitem;
2057 gboolean was_flushing = FALSE;
2059 while (!gst_data_queue_is_empty (sq->queue)) {
2060 GstMiniObject *data;
2062 /* FIXME: If this fails here although the queue is not empty,
2063 * we're flushing... but we want to rescue all sticky
2064 * events nonetheless.
2066 if (!gst_data_queue_pop (sq->queue, &sitem)) {
2067 was_flushing = TRUE;
2068 gst_data_queue_set_flushing (sq->queue, FALSE);
2072 mitem = (GstMultiQueueItem *) sitem;
2074 data = sitem->object;
2076 if (!full && !mitem->is_query && GST_IS_EVENT (data)
2077 && GST_EVENT_IS_STICKY (data)
2078 && GST_EVENT_TYPE (data) != GST_EVENT_SEGMENT
2079 && GST_EVENT_TYPE (data) != GST_EVENT_EOS) {
2080 gst_pad_store_sticky_event (sq->srcpad, GST_EVENT_CAST (data));
2083 sitem->destroy (sitem);
2086 gst_data_queue_flush (sq->queue);
2088 gst_data_queue_set_flushing (sq->queue, TRUE);
2092 gst_single_queue_free (GstSingleQueue * sq)
2095 gst_data_queue_flush (sq->queue);
2096 g_object_unref (sq->queue);
2097 g_cond_clear (&sq->turn);
2098 g_cond_clear (&sq->query_handled);
2102 static GstSingleQueue *
2103 gst_single_queue_new (GstMultiQueue * mqueue, guint id)
2108 guint temp_id = (id == -1) ? 0 : id;
2110 GST_MULTI_QUEUE_MUTEX_LOCK (mqueue);
2112 /* Find an unused queue ID, if possible the passed one */
2113 for (tmp = mqueue->queues; tmp; tmp = g_list_next (tmp)) {
2114 GstSingleQueue *sq2 = (GstSingleQueue *) tmp->data;
2115 /* This works because the IDs are sorted in ascending order */
2116 if (sq2->id == temp_id) {
2117 /* If this ID was requested by the caller return NULL,
2118 * otherwise just get us the next one */
2120 temp_id = sq2->id + 1;
2123 } else if (sq2->id > temp_id) {
2128 sq = g_new0 (GstSingleQueue, 1);
2132 mqueue->queues = g_list_insert_before (mqueue->queues, tmp, sq);
2133 mqueue->queues_cookie++;
2135 /* copy over max_size and extra_size so we don't need to take the lock
2136 * any longer when checking if the queue is full. */
2137 sq->max_size.visible = mqueue->max_size.visible;
2138 sq->max_size.bytes = mqueue->max_size.bytes;
2139 sq->max_size.time = mqueue->max_size.time;
2141 sq->extra_size.visible = mqueue->extra_size.visible;
2142 sq->extra_size.bytes = mqueue->extra_size.bytes;
2143 sq->extra_size.time = mqueue->extra_size.time;
2145 GST_DEBUG_OBJECT (mqueue, "Creating GstSingleQueue id:%d", sq->id);
2147 sq->mqueue = mqueue;
2148 sq->srcresult = GST_FLOW_FLUSHING;
2150 sq->queue = gst_data_queue_new ((GstDataQueueCheckFullFunction)
2151 single_queue_check_full,
2152 (GstDataQueueFullCallback) single_queue_overrun_cb,
2153 (GstDataQueueEmptyCallback) single_queue_underrun_cb, sq);
2155 sq->flushing = FALSE;
2156 gst_segment_init (&sq->sink_segment, GST_FORMAT_TIME);
2157 gst_segment_init (&sq->src_segment, GST_FORMAT_TIME);
2161 sq->next_time = GST_CLOCK_TIME_NONE;
2162 sq->last_time = GST_CLOCK_TIME_NONE;
2163 g_cond_init (&sq->turn);
2164 g_cond_init (&sq->query_handled);
2166 sq->sinktime = GST_CLOCK_TIME_NONE;
2167 sq->srctime = GST_CLOCK_TIME_NONE;
2168 sq->sink_tainted = TRUE;
2169 sq->src_tainted = TRUE;
2171 name = g_strdup_printf ("sink_%u", sq->id);
2172 sq->sinkpad = gst_pad_new_from_static_template (&sinktemplate, name);
2175 gst_pad_set_chain_function (sq->sinkpad,
2176 GST_DEBUG_FUNCPTR (gst_multi_queue_chain));
2177 gst_pad_set_activatemode_function (sq->sinkpad,
2178 GST_DEBUG_FUNCPTR (gst_multi_queue_sink_activate_mode));
2179 gst_pad_set_event_function (sq->sinkpad,
2180 GST_DEBUG_FUNCPTR (gst_multi_queue_sink_event));
2181 gst_pad_set_query_function (sq->sinkpad,
2182 GST_DEBUG_FUNCPTR (gst_multi_queue_sink_query));
2183 gst_pad_set_iterate_internal_links_function (sq->sinkpad,
2184 GST_DEBUG_FUNCPTR (gst_multi_queue_iterate_internal_links));
2185 GST_OBJECT_FLAG_SET (sq->sinkpad, GST_PAD_FLAG_PROXY_CAPS);
2187 name = g_strdup_printf ("src_%u", sq->id);
2188 sq->srcpad = gst_pad_new_from_static_template (&srctemplate, name);
2191 gst_pad_set_activatemode_function (sq->srcpad,
2192 GST_DEBUG_FUNCPTR (gst_multi_queue_src_activate_mode));
2193 gst_pad_set_event_function (sq->srcpad,
2194 GST_DEBUG_FUNCPTR (gst_multi_queue_src_event));
2195 gst_pad_set_query_function (sq->srcpad,
2196 GST_DEBUG_FUNCPTR (gst_multi_queue_src_query));
2197 gst_pad_set_iterate_internal_links_function (sq->srcpad,
2198 GST_DEBUG_FUNCPTR (gst_multi_queue_iterate_internal_links));
2199 GST_OBJECT_FLAG_SET (sq->srcpad, GST_PAD_FLAG_PROXY_CAPS);
2201 gst_pad_set_element_private (sq->sinkpad, (gpointer) sq);
2202 gst_pad_set_element_private (sq->srcpad, (gpointer) sq);
2204 GST_MULTI_QUEUE_MUTEX_UNLOCK (mqueue);
2206 /* only activate the pads when we are not in the NULL state
2207 * and add the pad under the state_lock to prevend state changes
2208 * between activating and adding */
2209 g_rec_mutex_lock (GST_STATE_GET_LOCK (mqueue));
2210 if (GST_STATE_TARGET (mqueue) != GST_STATE_NULL) {
2211 gst_pad_set_active (sq->srcpad, TRUE);
2212 gst_pad_set_active (sq->sinkpad, TRUE);
2214 gst_element_add_pad (GST_ELEMENT (mqueue), sq->srcpad);
2215 gst_element_add_pad (GST_ELEMENT (mqueue), sq->sinkpad);
2216 g_rec_mutex_unlock (GST_STATE_GET_LOCK (mqueue));
2218 GST_DEBUG_OBJECT (mqueue, "GstSingleQueue [%d] created and pads added",