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.
25 #include "gst_private.h"
28 #include "gstscheduler.h"
32 GstElementDetails gst_queue_details = {
38 "Erik Walthinsen <omega@cse.ogi.edu>",
43 /* Queue signals and args */
60 ARG_MIN_THRESHOLD_BYTES,
66 static void gst_queue_class_init (GstQueueClass *klass);
67 static void gst_queue_init (GstQueue *queue);
68 static void gst_queue_dispose (GObject *object);
70 static void gst_queue_set_property (GObject *object, guint prop_id,
71 const GValue *value, GParamSpec *pspec);
72 static void gst_queue_get_property (GObject *object, guint prop_id,
73 GValue *value, GParamSpec *pspec);
75 static void gst_queue_chain (GstPad *pad, GstBuffer *buf);
76 static GstBuffer * gst_queue_get (GstPad *pad);
77 static GstBufferPool* gst_queue_get_bufferpool (GstPad *pad);
79 static gboolean gst_queue_handle_src_event (GstPad *pad, GstEvent *event);
82 static void gst_queue_locked_flush (GstQueue *queue);
84 static GstElementStateReturn gst_queue_change_state (GstElement *element);
85 static gboolean gst_queue_release_locks (GstElement *element);
88 #define GST_TYPE_QUEUE_LEAKY (queue_leaky_get_type())
90 queue_leaky_get_type(void) {
91 static GType queue_leaky_type = 0;
92 static GEnumValue queue_leaky[] = {
93 { GST_QUEUE_NO_LEAK, "0", "Not Leaky" },
94 { GST_QUEUE_LEAK_UPSTREAM, "1", "Leaky on Upstream" },
95 { GST_QUEUE_LEAK_DOWNSTREAM, "2", "Leaky on Downstream" },
98 if (!queue_leaky_type) {
99 queue_leaky_type = g_enum_register_static("GstQueueLeaky", queue_leaky);
101 return queue_leaky_type;
104 static GstElementClass *parent_class = NULL;
105 static guint gst_queue_signals[LAST_SIGNAL] = { 0 };
108 gst_queue_get_type(void)
110 static GType queue_type = 0;
113 static const GTypeInfo queue_info = {
114 sizeof(GstQueueClass),
117 (GClassInitFunc)gst_queue_class_init,
122 (GInstanceInitFunc)gst_queue_init,
125 queue_type = g_type_register_static (GST_TYPE_ELEMENT, "GstQueue", &queue_info, 0);
131 gst_queue_class_init (GstQueueClass *klass)
133 GObjectClass *gobject_class;
134 GstElementClass *gstelement_class;
136 gobject_class = (GObjectClass*)klass;
137 gstelement_class = (GstElementClass*)klass;
139 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
141 gst_queue_signals[FULL] =
142 g_signal_new ("full", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
143 G_STRUCT_OFFSET (GstQueueClass, full), NULL, NULL,
144 g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
145 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LEAKY,
146 g_param_spec_enum ("leaky", "Leaky", "Where the queue leaks, if at all.",
147 GST_TYPE_QUEUE_LEAKY, GST_QUEUE_NO_LEAK, G_PARAM_READWRITE));
148 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LEVEL,
149 g_param_spec_int ("level", "Level", "How many buffers are in the queue.",
150 0, G_MAXINT, 0, G_PARAM_READABLE));
151 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MAX_LEVEL,
152 g_param_spec_int ("max_level", "Maximum Level", "How many buffers the queue holds.",
153 0, G_MAXINT, 100, G_PARAM_READWRITE));
154 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MIN_THRESHOLD_BYTES,
155 g_param_spec_int ("min_threshold_bytes", "Minimum Threshold",
156 "Minimum bytes required before signalling not_empty to reader.",
157 0, G_MAXINT, 0, G_PARAM_READWRITE));
158 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MAY_DEADLOCK,
159 g_param_spec_boolean ("may_deadlock", "May Deadlock", "The queue may deadlock if it's full and not PLAYING",
160 TRUE, G_PARAM_READWRITE));
161 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BLOCK_TIMEOUT,
162 g_param_spec_int ("block_timeout", "Timeout for Block",
163 "Microseconds until blocked queue times out and returns filler event. "
164 "Value of -1 disables timeout",
165 -1, G_MAXINT, -1, G_PARAM_READWRITE));
167 gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_queue_dispose);
168 gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_queue_set_property);
169 gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_queue_get_property);
171 gstelement_class->change_state = GST_DEBUG_FUNCPTR(gst_queue_change_state);
172 gstelement_class->release_locks = GST_DEBUG_FUNCPTR(gst_queue_release_locks);
175 static GstPadLinkReturn
176 gst_queue_link (GstPad *pad, GstCaps *caps)
178 GstQueue *queue = GST_QUEUE (gst_pad_get_parent (pad));
181 if (pad == queue->srcpad)
182 otherpad = queue->sinkpad;
184 otherpad = queue->srcpad;
186 return gst_pad_proxy_link (otherpad, caps);
190 gst_queue_getcaps (GstPad *pad, GstCaps *caps)
192 GstQueue *queue = GST_QUEUE (gst_pad_get_parent (pad));
195 if (pad == queue->srcpad)
196 otherpad = GST_PAD_PEER (queue->sinkpad);
198 otherpad = GST_PAD_PEER (queue->srcpad);
201 return gst_pad_get_caps (otherpad);
207 gst_queue_init (GstQueue *queue)
209 /* scheduling on this kind of element is, well, interesting */
210 GST_FLAG_SET (queue, GST_ELEMENT_DECOUPLED);
211 GST_FLAG_SET (queue, GST_ELEMENT_EVENT_AWARE);
213 queue->sinkpad = gst_pad_new ("sink", GST_PAD_SINK);
214 gst_pad_set_chain_function (queue->sinkpad, GST_DEBUG_FUNCPTR (gst_queue_chain));
215 gst_element_add_pad (GST_ELEMENT (queue), queue->sinkpad);
216 gst_pad_set_bufferpool_function (queue->sinkpad, GST_DEBUG_FUNCPTR (gst_queue_get_bufferpool));
217 gst_pad_set_link_function (queue->sinkpad, GST_DEBUG_FUNCPTR (gst_queue_link));
218 gst_pad_set_getcaps_function (queue->sinkpad, GST_DEBUG_FUNCPTR (gst_queue_getcaps));
220 queue->srcpad = gst_pad_new ("src", GST_PAD_SRC);
221 gst_pad_set_get_function (queue->srcpad, GST_DEBUG_FUNCPTR (gst_queue_get));
222 gst_element_add_pad (GST_ELEMENT (queue), queue->srcpad);
223 gst_pad_set_link_function (queue->srcpad, GST_DEBUG_FUNCPTR (gst_queue_link));
224 gst_pad_set_getcaps_function (queue->srcpad, GST_DEBUG_FUNCPTR (gst_queue_getcaps));
225 gst_pad_set_event_function (queue->srcpad, GST_DEBUG_FUNCPTR (gst_queue_handle_src_event));
227 queue->leaky = GST_QUEUE_NO_LEAK;
229 queue->level_buffers = 0;
230 queue->level_bytes = 0;
231 queue->level_time = G_GINT64_CONSTANT (0);
232 queue->size_buffers = 100; /* 100 buffers */
233 queue->size_bytes = 100 * 1024; /* 100KB */
234 queue->size_time = GST_SECOND; /* 1sec */
235 queue->min_threshold_bytes = 0;
236 queue->may_deadlock = TRUE;
237 queue->block_timeout = -1;
238 queue->interrupt = FALSE;
239 queue->flush = FALSE;
241 queue->qlock = g_mutex_new ();
242 queue->not_empty = g_cond_new ();
243 queue->not_full = g_cond_new ();
244 queue->events = g_async_queue_new();
245 queue->queue = g_queue_new ();
246 GST_CAT_DEBUG_OBJECT (GST_CAT_THREAD, queue, "initialized queue's not_empty & not_full conditions");
250 gst_queue_dispose (GObject *object)
252 GstQueue *queue = GST_QUEUE (object);
254 gst_element_set_state (GST_ELEMENT (queue), GST_STATE_NULL);
256 g_mutex_free (queue->qlock);
257 g_cond_free (queue->not_empty);
258 g_cond_free (queue->not_full);
259 g_queue_free (queue->queue);
261 g_async_queue_unref(queue->events);
263 G_OBJECT_CLASS (parent_class)->dispose (object);
266 static GstBufferPool*
267 gst_queue_get_bufferpool (GstPad *pad)
271 queue = GST_QUEUE (GST_OBJECT_PARENT (pad));
273 return gst_pad_get_bufferpool (queue->srcpad);
277 gst_queue_cleanup_data (gpointer data, const gpointer user_data)
279 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, user_data, "cleaning buffer %p", data);
281 gst_data_unref (GST_DATA (data));
285 gst_queue_locked_flush (GstQueue *queue)
289 while ((data = g_queue_pop_head (queue->queue))) {
290 gst_queue_cleanup_data (data, (gpointer) queue);
292 queue->timeval = NULL;
293 queue->level_buffers = 0;
294 queue->level_bytes = 0;
295 queue->level_time = G_GINT64_CONSTANT (0);
296 /* make sure any pending buffers to be added are flushed too */
298 /* signal not_full, since we apparently aren't full anymore */
299 g_cond_signal (queue->not_full);
303 gst_queue_chain (GstPad *pad, GstBuffer *buf)
307 g_return_if_fail (pad != NULL);
308 g_return_if_fail (GST_IS_PAD (pad));
309 g_return_if_fail (buf != NULL);
311 queue = GST_QUEUE (GST_OBJECT_PARENT (pad));
313 /* check for events to send upstream */
314 g_async_queue_lock(queue->events);
315 while (g_async_queue_length_unlocked(queue->events) > 0){
316 GstEvent *event = (GstEvent*)g_async_queue_pop_unlocked(queue->events);
317 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "sending event upstream\n");
318 gst_pad_event_default (pad, event);
319 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "event sent\n");
321 g_async_queue_unlock(queue->events);
324 /* we have to lock the queue since we span threads */
325 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "locking t:%p", g_thread_self ());
326 g_mutex_lock (queue->qlock);
327 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "locked t:%p", g_thread_self ());
329 /* assume don't need to flush this buffer when the queue is filled */
330 queue->flush = FALSE;
332 if (GST_IS_EVENT (buf)) {
333 switch (GST_EVENT_TYPE (buf)) {
334 case GST_EVENT_FLUSH:
335 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "FLUSH event, flushing queue\n");
336 gst_queue_locked_flush (queue);
339 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "eos in on %s %d\n",
340 GST_ELEMENT_NAME (queue), queue->level_buffers);
343 /* we put the event in the queue, we don't have to act ourselves */
348 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "adding buffer %p of size %d",buf,GST_BUFFER_SIZE(buf));
350 if (queue->level_buffers == queue->size_buffers) {
351 g_mutex_unlock (queue->qlock);
352 g_signal_emit (G_OBJECT (queue), gst_queue_signals[FULL], 0);
353 g_mutex_lock (queue->qlock);
355 /* if this is a leaky queue... */
357 /* FIXME don't want to leak events! */
358 /* if we leak on the upstream side, drop the current buffer */
359 if (queue->leaky == GST_QUEUE_LEAK_UPSTREAM) {
360 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "queue is full, leaking buffer on upstream end");
361 if (GST_IS_EVENT (buf))
362 fprintf(stderr, "Error: queue [%s] leaked an event, type:%d\n",
363 GST_ELEMENT_NAME(GST_ELEMENT(queue)),
364 GST_EVENT_TYPE(GST_EVENT(buf)));
365 /* now we have to clean up and exit right away */
366 g_mutex_unlock (queue->qlock);
369 /* otherwise we have to push a buffer off the other end */
374 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "queue is full, leaking buffer on downstream end");
376 front = g_queue_pop_head (queue->queue);
377 leakbuf = (GstBuffer *)(front);
379 if (GST_IS_EVENT (leakbuf)) {
380 fprintf(stderr, "Error: queue [%s] leaked an event, type:%d\n",
381 GST_ELEMENT_NAME(GST_ELEMENT(queue)),
382 GST_EVENT_TYPE(GST_EVENT(leakbuf)));
384 queue->level_buffers--;
385 queue->level_bytes -= GST_BUFFER_SIZE(leakbuf);
386 gst_data_unref (GST_DATA (leakbuf));
390 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "pre full wait, level:%d/%d buffers, %d bytes",
391 queue->level_buffers, queue->size_buffers, queue->level_bytes);
393 while (queue->level_buffers == queue->size_buffers) {
394 /* if there's a pending state change for this queue or its manager, switch */
395 /* back to iterator so bottom half of state change executes */
396 if (queue->interrupt) {
397 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "interrupted!!");
398 g_mutex_unlock (queue->qlock);
399 if (gst_scheduler_interrupt (gst_pad_get_scheduler (queue->sinkpad), GST_ELEMENT (queue)))
401 /* if we got here because we were unlocked after a flush, we don't need
402 * to add the buffer to the queue again */
404 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "not adding pending buffer after flush");
407 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "adding pending buffer after interrupt");
410 if (GST_STATE (queue) != GST_STATE_PLAYING) {
411 /* this means the other end is shut down */
412 /* try to signal to resolve the error */
413 if (!queue->may_deadlock) {
414 g_mutex_unlock (queue->qlock);
415 gst_data_unref (GST_DATA (buf));
416 gst_element_error (GST_ELEMENT (queue), "deadlock found, source pad elements are shut down");
417 /* we don't want to goto out_unref here, since we want to clean up before calling gst_element_error */
421 g_print ("%s: waiting for the app to restart source pad elements\n", GST_ELEMENT_NAME (queue));
425 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "waiting for not_full, level:%d/%d buffers, %d bytes",
426 queue->level_buffers, queue->size_buffers, queue->level_bytes);
427 g_cond_wait (queue->not_full, queue->qlock);
428 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "got not_full signal");
430 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "post full wait, level:%d/%d buffers, %d bytes",
431 queue->level_buffers, queue->size_buffers, queue->level_bytes);
434 /* put the buffer on the tail of the list */
435 g_queue_push_tail (queue->queue, buf);
437 queue->level_buffers++;
438 queue->level_bytes += GST_BUFFER_SIZE(buf);
440 /* this assertion _has_ to hold */
441 g_assert (queue->queue->length == queue->level_buffers);
443 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "(%s:%s)+ level:%d/%d buffers, %d bytes",
444 GST_DEBUG_PAD_NAME(pad),
445 queue->level_buffers, queue->size_buffers, queue->level_bytes);
447 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "signalling not_empty");
448 g_cond_signal (queue->not_empty);
449 g_mutex_unlock (queue->qlock);
454 gst_data_unref (GST_DATA (buf));
459 gst_queue_get (GstPad *pad)
462 GstBuffer *buf = NULL;
465 g_assert(pad != NULL);
466 g_assert(GST_IS_PAD(pad));
467 g_return_val_if_fail (pad != NULL, NULL);
468 g_return_val_if_fail (GST_IS_PAD (pad), NULL);
470 queue = GST_QUEUE (GST_OBJECT_PARENT (pad));
473 /* have to lock for thread-safety */
474 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "locking t:%p", g_thread_self ());
475 g_mutex_lock (queue->qlock);
476 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "locked t:%p %p", g_thread_self (), queue->not_empty);
478 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "pre empty wait, level:%d/%d buffers, %d bytes",
479 queue->level_buffers, queue->size_buffers, queue->level_bytes);
480 while (queue->level_buffers == 0) {
481 /* if there's a pending state change for this queue or its manager, switch
482 * back to iterator so bottom half of state change executes
484 //while (GST_STATE_PENDING (queue) != GST_STATE_VOID_PENDING) {
485 if (queue->interrupt) {
486 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "interrupted!!");
487 g_mutex_unlock (queue->qlock);
488 if (gst_scheduler_interrupt (gst_pad_get_scheduler (queue->srcpad), GST_ELEMENT (queue)))
489 return GST_BUFFER (gst_event_new (GST_EVENT_INTERRUPT));
492 if (GST_STATE (queue) != GST_STATE_PLAYING) {
493 /* this means the other end is shut down */
494 if (!queue->may_deadlock) {
495 g_mutex_unlock (queue->qlock);
496 gst_element_error (GST_ELEMENT (queue), "deadlock found, sink pad elements are shut down");
500 g_print ("%s: waiting for the app to restart source pad elements\n", GST_ELEMENT_NAME (queue));
504 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "waiting for not_empty, level:%d/%d buffers, %d bytes",
505 queue->level_buffers, queue->size_buffers, queue->level_bytes);
507 /* if (queue->block_timeout > -1){ */
510 g_get_current_time(&timeout);
511 g_time_val_add(&timeout, queue->block_timeout);
512 if (!g_cond_timed_wait (queue->not_empty, queue->qlock, &timeout)){
513 g_mutex_unlock (queue->qlock);
514 g_warning ("filler");
515 return GST_BUFFER(gst_event_new_filler());
519 g_cond_wait (queue->not_empty, queue->qlock);
521 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "got not_empty signal");
523 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "post empty wait, level:%d/%d buffers, %d bytes",
524 queue->level_buffers, queue->size_buffers, queue->level_bytes);
526 front = g_queue_pop_head (queue->queue);
527 buf = (GstBuffer *)(front);
528 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "retrieved buffer %p from queue", buf);
530 queue->level_buffers--;
531 queue->level_bytes -= GST_BUFFER_SIZE(buf);
533 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "(%s:%s)- level:%d/%d buffers, %d bytes",
534 GST_DEBUG_PAD_NAME(pad),
535 queue->level_buffers, queue->size_buffers, queue->level_bytes);
537 /* this assertion _has_ to hold */
538 g_assert (queue->queue->length == queue->level_buffers);
540 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "signalling not_full");
541 g_cond_signal (queue->not_full);
543 g_mutex_unlock (queue->qlock);
545 /* FIXME where should this be? locked? */
546 if (GST_IS_EVENT(buf)) {
547 GstEvent *event = GST_EVENT(buf);
548 switch (GST_EVENT_TYPE(event)) {
550 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "queue \"%s\" eos", GST_ELEMENT_NAME (queue));
551 gst_element_set_eos (GST_ELEMENT (queue));
563 gst_queue_handle_src_event (GstPad *pad, GstEvent *event)
570 queue = GST_QUEUE (GST_OBJECT_PARENT (pad));
572 g_mutex_lock (queue->qlock);
574 if (gst_element_get_state (GST_ELEMENT (queue)) == GST_STATE_PLAYING) {
575 /* push the event to the queue for upstream consumption */
576 g_async_queue_push(queue->events, event);
577 g_warning ("FIXME: sending event in a running queue");
578 /* FIXME wait for delivery of the event here, then return the result
579 * instead of FALSE */
584 event_type = GST_EVENT_TYPE (event);
585 if (event_type == GST_EVENT_SEEK)
586 flag_flush = GST_EVENT_SEEK_FLAGS (event) & GST_SEEK_FLAG_FLUSH;
588 res = gst_pad_event_default (pad, event);
590 switch (event_type) {
591 case GST_EVENT_FLUSH:
592 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "FLUSH event, flushing queue\n");
593 gst_queue_locked_flush (queue);
597 gst_queue_locked_flush (queue);
604 g_mutex_unlock (queue->qlock);
606 /* we have to claim success, but we don't really know */
611 gst_queue_release_locks (GstElement *element)
615 queue = GST_QUEUE (element);
617 g_mutex_lock (queue->qlock);
618 queue->interrupt = TRUE;
619 g_cond_signal (queue->not_full);
620 g_cond_signal (queue->not_empty);
621 g_mutex_unlock (queue->qlock);
626 static GstElementStateReturn
627 gst_queue_change_state (GstElement *element)
630 GstElementStateReturn ret;
632 queue = GST_QUEUE (element);
634 GST_CAT_LOG_OBJECT (GST_CAT_STATES, element, "starting state change");
636 /* lock the queue so another thread (not in sync with this thread's state)
637 * can't call this queue's _get (or whatever)
639 g_mutex_lock (queue->qlock);
641 switch (GST_STATE_TRANSITION (element)) {
642 case GST_STATE_NULL_TO_READY:
643 gst_queue_locked_flush (queue);
645 case GST_STATE_READY_TO_PAUSED:
647 case GST_STATE_PAUSED_TO_PLAYING:
648 if (!GST_PAD_IS_LINKED (queue->sinkpad)) {
649 GST_CAT_DEBUG_OBJECT (GST_CAT_STATES, queue, "queue %s is not linked", GST_ELEMENT_NAME (queue));
650 /* FIXME can this be? */
651 g_cond_signal (queue->not_empty);
653 ret = GST_STATE_FAILURE;
657 GstScheduler *src_sched, *sink_sched;
659 src_sched = gst_pad_get_scheduler (GST_PAD_CAST (queue->srcpad));
660 sink_sched = gst_pad_get_scheduler (GST_PAD_CAST (queue->sinkpad));
662 if (src_sched == sink_sched) {
663 GST_CAT_DEBUG_OBJECT (GST_CAT_STATES, queue, "queue %s does not connect different schedulers",
664 GST_ELEMENT_NAME (queue));
666 g_warning ("queue %s does not connect different schedulers",
667 GST_ELEMENT_NAME (queue));
669 ret = GST_STATE_FAILURE;
673 queue->interrupt = FALSE;
675 case GST_STATE_PLAYING_TO_PAUSED:
677 case GST_STATE_PAUSED_TO_READY:
678 gst_queue_locked_flush (queue);
680 case GST_STATE_READY_TO_NULL:
684 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element);
687 g_mutex_unlock (queue->qlock);
689 GST_CAT_LOG_OBJECT (GST_CAT_STATES, element, "done with state change");
695 gst_queue_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
699 /* it's not null if we got it, but it might not be ours */
700 g_return_if_fail (GST_IS_QUEUE (object));
702 queue = GST_QUEUE (object);
706 queue->leaky = g_value_get_enum (value);
709 queue->size_buffers = g_value_get_int (value);
711 case ARG_MIN_THRESHOLD_BYTES:
712 queue->min_threshold_bytes = g_value_get_int (value);
714 case ARG_MAY_DEADLOCK:
715 queue->may_deadlock = g_value_get_boolean (value);
717 case ARG_BLOCK_TIMEOUT:
718 queue->block_timeout = g_value_get_int (value);
721 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
727 gst_queue_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
731 /* it's not null if we got it, but it might not be ours */
732 g_return_if_fail (GST_IS_QUEUE (object));
734 queue = GST_QUEUE (object);
738 g_value_set_enum (value, queue->leaky);
741 g_value_set_int (value, queue->level_buffers);
744 g_value_set_int (value, queue->size_buffers);
746 case ARG_MIN_THRESHOLD_BYTES:
747 g_value_set_int (value, queue->min_threshold_bytes);
749 case ARG_MAY_DEADLOCK:
750 g_value_set_boolean (value, queue->may_deadlock);
752 case ARG_BLOCK_TIMEOUT:
753 g_value_set_int (value, queue->block_timeout);
756 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);