2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wtay@chello.be>
4 * 2003 Colin Walters <cwalters@gnome.org>
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 * Boston, MA 02111-1307, USA.
24 /* #define DEBUG_ENABLED */
25 /* #define STATUS_ENABLED */
28 #define STATUS(A) GST_DEBUG(GST_CAT_DATAFLOW, A, GST_ELEMENT_NAME(queue))
35 #include "gst_private.h"
38 #include "gstscheduler.h"
42 GstElementDetails gst_queue_details = {
48 "Erik Walthinsen <omega@cse.ogi.edu>",
53 /* Queue signals and args */
75 static void gst_queue_class_init (GstQueueClass *klass);
76 static void gst_queue_init (GstQueue *queue);
77 static void gst_queue_dispose (GObject *object);
79 static void gst_queue_set_property (GObject *object, guint prop_id,
80 const GValue *value, GParamSpec *pspec);
81 static void gst_queue_get_property (GObject *object, guint prop_id,
82 GValue *value, GParamSpec *pspec);
84 static void gst_queue_chain (GstPad *pad, GstBuffer *buf);
85 static GstBuffer * gst_queue_get (GstPad *pad);
86 static GstBufferPool* gst_queue_get_bufferpool (GstPad *pad);
88 static gboolean gst_queue_handle_src_event (GstPad *pad, GstEvent *event);
91 static void gst_queue_locked_flush (GstQueue *queue);
93 static GstElementStateReturn gst_queue_change_state (GstElement *element);
94 static gboolean gst_queue_release_locks (GstElement *element);
97 #define GST_TYPE_QUEUE_LEAKY (queue_leaky_get_type())
99 queue_leaky_get_type(void) {
100 static GType queue_leaky_type = 0;
101 static GEnumValue queue_leaky[] = {
102 { GST_QUEUE_NO_LEAK, "0", "Not Leaky" },
103 { GST_QUEUE_LEAK_UPSTREAM, "1", "Leaky on Upstream" },
104 { GST_QUEUE_LEAK_DOWNSTREAM, "2", "Leaky on Downstream" },
107 if (!queue_leaky_type) {
108 queue_leaky_type = g_enum_register_static("GstQueueLeaky", queue_leaky);
110 return queue_leaky_type;
113 static GstElementClass *parent_class = NULL;
114 static guint gst_queue_signals[LAST_SIGNAL] = { 0 };
117 gst_queue_get_type(void)
119 static GType queue_type = 0;
122 static const GTypeInfo queue_info = {
123 sizeof(GstQueueClass),
126 (GClassInitFunc)gst_queue_class_init,
131 (GInstanceInitFunc)gst_queue_init,
134 queue_type = g_type_register_static (GST_TYPE_ELEMENT, "GstQueue", &queue_info, 0);
140 gst_queue_class_init (GstQueueClass *klass)
142 GObjectClass *gobject_class;
143 GstElementClass *gstelement_class;
145 gobject_class = (GObjectClass*)klass;
146 gstelement_class = (GstElementClass*)klass;
148 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
150 gst_queue_signals[FULL] =
151 g_signal_new ("full", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
152 G_STRUCT_OFFSET (GstQueueClass, full), NULL, NULL,
153 g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
154 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LEAKY,
155 g_param_spec_enum ("leaky", "Leaky", "Where the queue leaks, if at all.",
156 GST_TYPE_QUEUE_LEAKY, GST_QUEUE_NO_LEAK, G_PARAM_READWRITE));
157 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LEVEL,
158 g_param_spec_int ("level", "Level", "How many buffers are in the queue.",
159 0, G_MAXINT, 0, G_PARAM_READABLE));
160 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MAX_LEVEL,
161 g_param_spec_int ("max_level", "Maximum Level", "How many buffers the queue holds.",
162 0, G_MAXINT, 100, G_PARAM_READWRITE));
163 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MAY_DEADLOCK,
164 g_param_spec_boolean ("may_deadlock", "May Deadlock", "The queue may deadlock if it's full and not PLAYING",
165 TRUE, G_PARAM_READWRITE));
166 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BLOCK_TIMEOUT,
167 g_param_spec_int ("block_timeout", "Timeout for Block",
168 "Microseconds until blocked queue times out and returns filler event. "
169 "Value of -1 disables timeout",
170 -1, G_MAXINT, -1, G_PARAM_READWRITE));
172 gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_queue_dispose);
173 gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_queue_set_property);
174 gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_queue_get_property);
176 gstelement_class->change_state = GST_DEBUG_FUNCPTR(gst_queue_change_state);
177 gstelement_class->release_locks = GST_DEBUG_FUNCPTR(gst_queue_release_locks);
180 static GstPadLinkReturn
181 gst_queue_link (GstPad *pad, GstCaps *caps)
183 GstQueue *queue = GST_QUEUE (gst_pad_get_parent (pad));
186 if (pad == queue->srcpad)
187 otherpad = queue->sinkpad;
189 otherpad = queue->srcpad;
191 return gst_pad_proxy_link (otherpad, caps);
195 gst_queue_getcaps (GstPad *pad, GstCaps *caps)
197 GstQueue *queue = GST_QUEUE (gst_pad_get_parent (pad));
200 if (pad == queue->srcpad)
201 otherpad = GST_PAD_PEER (queue->sinkpad);
203 otherpad = GST_PAD_PEER (queue->srcpad);
206 return gst_pad_get_caps (otherpad);
212 gst_queue_init (GstQueue *queue)
214 /* scheduling on this kind of element is, well, interesting */
215 GST_FLAG_SET (queue, GST_ELEMENT_DECOUPLED);
216 GST_FLAG_SET (queue, GST_ELEMENT_EVENT_AWARE);
218 queue->sinkpad = gst_pad_new ("sink", GST_PAD_SINK);
219 gst_pad_set_chain_function (queue->sinkpad, GST_DEBUG_FUNCPTR (gst_queue_chain));
220 gst_element_add_pad (GST_ELEMENT (queue), queue->sinkpad);
221 gst_pad_set_bufferpool_function (queue->sinkpad, GST_DEBUG_FUNCPTR (gst_queue_get_bufferpool));
222 gst_pad_set_link_function (queue->sinkpad, GST_DEBUG_FUNCPTR (gst_queue_link));
223 gst_pad_set_getcaps_function (queue->sinkpad, GST_DEBUG_FUNCPTR (gst_queue_getcaps));
225 queue->srcpad = gst_pad_new ("src", GST_PAD_SRC);
226 gst_pad_set_get_function (queue->srcpad, GST_DEBUG_FUNCPTR (gst_queue_get));
227 gst_element_add_pad (GST_ELEMENT (queue), queue->srcpad);
228 gst_pad_set_link_function (queue->srcpad, GST_DEBUG_FUNCPTR (gst_queue_link));
229 gst_pad_set_getcaps_function (queue->srcpad, GST_DEBUG_FUNCPTR (gst_queue_getcaps));
230 gst_pad_set_event_function (queue->srcpad, GST_DEBUG_FUNCPTR (gst_queue_handle_src_event));
232 queue->leaky = GST_QUEUE_NO_LEAK;
234 queue->level_buffers = 0;
235 queue->level_bytes = 0;
236 queue->level_time = G_GINT64_CONSTANT (0);
237 queue->size_buffers = 100; /* 100 buffers */
238 queue->size_bytes = 100 * 1024; /* 100KB */
239 queue->size_time = G_GINT64_CONSTANT (1000000000); /* 1sec */
240 queue->may_deadlock = TRUE;
241 queue->block_timeout = -1;
242 queue->interrupt = FALSE;
243 queue->flush = FALSE;
245 queue->qlock = g_mutex_new ();
246 queue->not_empty = g_cond_new ();
247 queue->not_full = g_cond_new ();
248 queue->events = g_async_queue_new();
249 queue->queue = g_queue_new ();
250 GST_DEBUG_ELEMENT (GST_CAT_THREAD, queue, "initialized queue's not_empty & not_full conditions");
254 gst_queue_dispose (GObject *object)
256 GstQueue *queue = GST_QUEUE (object);
258 gst_element_set_state (GST_ELEMENT (queue), GST_STATE_NULL);
260 g_mutex_free (queue->qlock);
261 g_cond_free (queue->not_empty);
262 g_cond_free (queue->not_full);
263 g_queue_free (queue->queue);
265 g_async_queue_unref(queue->events);
267 G_OBJECT_CLASS (parent_class)->dispose (object);
270 static GstBufferPool*
271 gst_queue_get_bufferpool (GstPad *pad)
275 queue = GST_QUEUE (GST_OBJECT_PARENT (pad));
277 return gst_pad_get_bufferpool (queue->srcpad);
281 gst_queue_cleanup_data (gpointer data, const gpointer user_data)
283 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, user_data, "cleaning buffer %p", data);
285 gst_data_unref (GST_DATA (data));
289 gst_queue_locked_flush (GstQueue *queue)
293 while ((data = g_queue_pop_head (queue->queue))) {
294 gst_queue_cleanup_data (data, (gpointer) queue);
296 queue->timeval = NULL;
297 queue->level_buffers = 0;
298 queue->level_bytes = 0;
299 queue->level_time = G_GINT64_CONSTANT (0);
300 /* make sure any pending buffers to be added are flushed too */
302 /* signal not_full, since we apparently aren't full anymore */
303 g_cond_signal (queue->not_full);
307 gst_queue_chain (GstPad *pad, GstBuffer *buf)
311 g_return_if_fail (pad != NULL);
312 g_return_if_fail (GST_IS_PAD (pad));
313 g_return_if_fail (buf != NULL);
315 queue = GST_QUEUE (GST_OBJECT_PARENT (pad));
317 /* check for events to send upstream */
318 g_async_queue_lock(queue->events);
319 while (g_async_queue_length_unlocked(queue->events) > 0){
320 GstEvent *event = (GstEvent*)g_async_queue_pop_unlocked(queue->events);
321 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "sending event upstream\n");
322 gst_pad_event_default (pad, event);
323 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "event sent\n");
325 g_async_queue_unlock(queue->events);
328 /* we have to lock the queue since we span threads */
329 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "locking t:%p", g_thread_self ());
330 g_mutex_lock (queue->qlock);
331 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "locked t:%p", g_thread_self ());
333 /* assume don't need to flush this buffer when the queue is filled */
334 queue->flush = FALSE;
336 if (GST_IS_EVENT (buf)) {
337 switch (GST_EVENT_TYPE (buf)) {
338 case GST_EVENT_FLUSH:
339 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "FLUSH event, flushing queue\n");
340 gst_queue_locked_flush (queue);
343 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "eos in on %s %d\n",
344 GST_ELEMENT_NAME (queue), queue->level_buffers);
347 /* we put the event in the queue, we don't have to act ourselves */
352 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "adding buffer %p of size %d",buf,GST_BUFFER_SIZE(buf));
354 if (queue->level_buffers == queue->size_buffers) {
355 g_mutex_unlock (queue->qlock);
356 g_signal_emit (G_OBJECT (queue), gst_queue_signals[FULL], 0);
357 g_mutex_lock (queue->qlock);
359 /* if this is a leaky queue... */
361 /* FIXME don't want to leak events! */
362 /* if we leak on the upstream side, drop the current buffer */
363 if (queue->leaky == GST_QUEUE_LEAK_UPSTREAM) {
364 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "queue is full, leaking buffer on upstream end");
365 if (GST_IS_EVENT (buf))
366 fprintf(stderr, "Error: queue [%s] leaked an event, type:%d\n",
367 GST_ELEMENT_NAME(GST_ELEMENT(queue)),
368 GST_EVENT_TYPE(GST_EVENT(buf)));
369 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "queue is full, leaking buffer on upstream end");
370 /* now we have to clean up and exit right away */
371 g_mutex_unlock (queue->qlock);
374 /* otherwise we have to push a buffer off the other end */
379 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "queue is full, leaking buffer on downstream end");
381 front = g_queue_pop_head (queue->queue);
382 leakbuf = (GstBuffer *)(front);
384 if (GST_IS_EVENT (leakbuf)) {
385 fprintf(stderr, "Error: queue [%s] leaked an event, type:%d\n",
386 GST_ELEMENT_NAME(GST_ELEMENT(queue)),
387 GST_EVENT_TYPE(GST_EVENT(leakbuf)));
389 queue->level_buffers--;
390 queue->level_bytes -= GST_BUFFER_SIZE(leakbuf);
391 gst_data_unref (GST_DATA (leakbuf));
395 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "pre full wait, level:%d/%d",
396 queue->level_buffers, queue->size_buffers);
398 while (queue->level_buffers == queue->size_buffers) {
399 /* if there's a pending state change for this queue or its manager, switch */
400 /* back to iterator so bottom half of state change executes */
401 if (queue->interrupt) {
402 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "interrupted!!");
403 g_mutex_unlock (queue->qlock);
404 if (gst_scheduler_interrupt (gst_pad_get_scheduler (queue->sinkpad), GST_ELEMENT (queue)))
406 /* if we got here bacause we were unlocked after a flush, we don't need
407 * to add the buffer to the queue again */
409 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "not adding pending buffer after flush");
412 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "adding pending buffer after interrupt");
415 if (GST_STATE (queue) != GST_STATE_PLAYING) {
416 /* this means the other end is shut down */
417 /* try to signal to resolve the error */
418 if (!queue->may_deadlock) {
419 g_mutex_unlock (queue->qlock);
420 gst_data_unref (GST_DATA (buf));
421 gst_element_error (GST_ELEMENT (queue), "deadlock found, source pad elements are shut down");
422 /* we don't want to goto out_unref here, since we want to clean up before calling gst_element_error */
426 g_print ("%s: waiting for the app to restart source pad elements\n", GST_ELEMENT_NAME (queue));
430 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "waiting for not_full, level:%d/%d",
431 queue->level_buffers, queue->size_buffers);
432 g_cond_wait (queue->not_full, queue->qlock);
433 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "got not_full signal");
435 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "post full wait, level:%d/%d",
436 queue->level_buffers, queue->size_buffers);
439 /* put the buffer on the tail of the list */
440 g_queue_push_tail (queue->queue, buf);
442 queue->level_buffers++;
443 queue->level_bytes += GST_BUFFER_SIZE(buf);
445 /* this assertion _has_ to hold */
446 g_assert (queue->queue->length == queue->level_buffers);
448 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "(%s:%s)+ level:%d/%d",
449 GST_DEBUG_PAD_NAME(pad),
450 queue->level_buffers, queue->size_buffers);
452 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "signalling not_empty");
453 g_cond_signal (queue->not_empty);
454 g_mutex_unlock (queue->qlock);
459 gst_data_unref (GST_DATA (buf));
464 gst_queue_get (GstPad *pad)
467 GstBuffer *buf = NULL;
470 g_assert(pad != NULL);
471 g_assert(GST_IS_PAD(pad));
472 g_return_val_if_fail (pad != NULL, NULL);
473 g_return_val_if_fail (GST_IS_PAD (pad), NULL);
475 queue = GST_QUEUE (GST_OBJECT_PARENT (pad));
478 /* have to lock for thread-safety */
479 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "locking t:%p", g_thread_self ());
480 g_mutex_lock (queue->qlock);
481 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "locked t:%p %p", g_thread_self (), queue->not_empty);
483 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "pre empty wait, level:%d/%d", queue->level_buffers, queue->size_buffers);
484 while (queue->level_buffers == 0) {
485 /* if there's a pending state change for this queue or its manager, switch
486 * back to iterator so bottom half of state change executes
488 //while (GST_STATE_PENDING (queue) != GST_STATE_VOID_PENDING) {
489 if (queue->interrupt) {
490 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "interrupted!!");
491 g_mutex_unlock (queue->qlock);
492 if (gst_scheduler_interrupt (gst_pad_get_scheduler (queue->srcpad), GST_ELEMENT (queue)))
493 return GST_BUFFER (gst_event_new (GST_EVENT_INTERRUPT));
496 if (GST_STATE (queue) != GST_STATE_PLAYING) {
497 /* this means the other end is shut down */
498 if (!queue->may_deadlock) {
499 g_mutex_unlock (queue->qlock);
500 gst_element_error (GST_ELEMENT (queue), "deadlock found, sink pad elements are shut down");
504 g_print ("%s: waiting for the app to restart source pad elements\n", GST_ELEMENT_NAME (queue));
508 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "waiting for not_empty, level:%d/%d", queue->level_buffers, queue->size_buffers);
510 /* if (queue->block_timeout > -1){ */
513 g_get_current_time(&timeout);
514 g_time_val_add(&timeout, queue->block_timeout);
515 if (!g_cond_timed_wait (queue->not_empty, queue->qlock, &timeout)){
516 g_mutex_unlock (queue->qlock);
517 g_warning ("filler");
518 return GST_BUFFER(gst_event_new_filler());
522 g_cond_wait (queue->not_empty, queue->qlock);
524 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "got not_empty signal");
526 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "post empty wait, level:%d/%d", queue->level_buffers, queue->size_buffers);
528 front = g_queue_pop_head (queue->queue);
529 buf = (GstBuffer *)(front);
530 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "retrieved buffer %p from queue", buf);
532 queue->level_buffers--;
533 queue->level_bytes -= GST_BUFFER_SIZE(buf);
535 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "(%s:%s)- level:%d/%d",
536 GST_DEBUG_PAD_NAME(pad),
537 queue->level_buffers, queue->size_buffers);
539 /* this assertion _has_ to hold */
540 g_assert (queue->queue->length == queue->level_buffers);
542 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "signalling not_full");
543 g_cond_signal (queue->not_full);
545 g_mutex_unlock (queue->qlock);
547 /* FIXME where should this be? locked? */
548 if (GST_IS_EVENT(buf)) {
549 GstEvent *event = GST_EVENT(buf);
550 switch (GST_EVENT_TYPE(event)) {
552 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "queue \"%s\" eos", GST_ELEMENT_NAME (queue));
553 gst_element_set_eos (GST_ELEMENT (queue));
565 gst_queue_handle_src_event (GstPad *pad, GstEvent *event)
572 queue = GST_QUEUE (GST_OBJECT_PARENT (pad));
574 g_mutex_lock (queue->qlock);
576 if (gst_element_get_state (GST_ELEMENT (queue)) == GST_STATE_PLAYING) {
577 /* push the event to the queue for upstream consumption */
578 g_async_queue_push(queue->events, event);
579 g_warning ("FIXME: sending event in a running queue");
580 /* FIXME wait for delivery of the event here, then return the result
581 * instead of FALSE */
586 event_type = GST_EVENT_TYPE (event);
587 if (event_type == GST_EVENT_SEEK)
588 flag_flush = GST_EVENT_SEEK_FLAGS (event) & GST_SEEK_FLAG_FLUSH;
590 res = gst_pad_event_default (pad, event);
592 switch (event_type) {
593 case GST_EVENT_FLUSH:
594 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "FLUSH event, flushing queue\n");
595 gst_queue_locked_flush (queue);
599 gst_queue_locked_flush (queue);
606 g_mutex_unlock (queue->qlock);
608 /* we have to claim success, but we don't really know */
613 gst_queue_release_locks (GstElement *element)
617 queue = GST_QUEUE (element);
619 g_mutex_lock (queue->qlock);
620 queue->interrupt = TRUE;
621 g_cond_signal (queue->not_full);
622 g_cond_signal (queue->not_empty);
623 g_mutex_unlock (queue->qlock);
628 static GstElementStateReturn
629 gst_queue_change_state (GstElement *element)
632 GstElementStateReturn ret;
634 queue = GST_QUEUE (element);
636 GST_DEBUG_ENTER("('%s')", GST_ELEMENT_NAME (element));
638 /* lock the queue so another thread (not in sync with this thread's state)
639 * can't call this queue's _get (or whatever)
641 g_mutex_lock (queue->qlock);
643 switch (GST_STATE_TRANSITION (element)) {
644 case GST_STATE_NULL_TO_READY:
645 gst_queue_locked_flush (queue);
647 case GST_STATE_READY_TO_PAUSED:
649 case GST_STATE_PAUSED_TO_PLAYING:
650 if (!GST_PAD_IS_LINKED (queue->sinkpad)) {
651 GST_DEBUG_ELEMENT (GST_CAT_STATES, queue, "queue %s is not linked", GST_ELEMENT_NAME (queue));
652 /* FIXME can this be? */
653 g_cond_signal (queue->not_empty);
655 ret = GST_STATE_FAILURE;
659 GstScheduler *src_sched, *sink_sched;
661 src_sched = gst_pad_get_scheduler (GST_PAD_CAST (queue->srcpad));
662 sink_sched = gst_pad_get_scheduler (GST_PAD_CAST (queue->sinkpad));
664 if (src_sched == sink_sched) {
665 GST_DEBUG_ELEMENT (GST_CAT_STATES, queue, "queue %s does not connect different schedulers",
666 GST_ELEMENT_NAME (queue));
668 g_warning ("queue %s does not connect different schedulers",
669 GST_ELEMENT_NAME (queue));
671 ret = GST_STATE_FAILURE;
675 queue->interrupt = FALSE;
677 case GST_STATE_PLAYING_TO_PAUSED:
679 case GST_STATE_PAUSED_TO_READY:
680 gst_queue_locked_flush (queue);
682 case GST_STATE_READY_TO_NULL:
686 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element);
689 g_mutex_unlock (queue->qlock);
691 GST_DEBUG_LEAVE("('%s')", GST_ELEMENT_NAME (element));
697 gst_queue_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
701 /* it's not null if we got it, but it might not be ours */
702 g_return_if_fail (GST_IS_QUEUE (object));
704 queue = GST_QUEUE (object);
708 queue->leaky = g_value_get_enum (value);
711 queue->size_buffers = g_value_get_int (value);
713 case ARG_MAY_DEADLOCK:
714 queue->may_deadlock = g_value_get_boolean (value);
716 case ARG_BLOCK_TIMEOUT:
717 queue->block_timeout = g_value_get_int (value);
720 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
726 gst_queue_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
730 /* it's not null if we got it, but it might not be ours */
731 g_return_if_fail (GST_IS_QUEUE (object));
733 queue = GST_QUEUE (object);
737 g_value_set_enum (value, queue->leaky);
740 g_value_set_int (value, queue->level_buffers);
743 g_value_set_int (value, queue->size_buffers);
745 case ARG_MAY_DEADLOCK:
746 g_value_set_boolean (value, queue->may_deadlock);
748 case ARG_BLOCK_TIMEOUT:
749 g_value_set_int (value, queue->block_timeout);
752 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);