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, GstData *data);
76 static GstData * 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, GstData *data)
307 g_return_if_fail (pad != NULL);
308 g_return_if_fail (GST_IS_PAD (pad));
309 g_return_if_fail (data != 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 (data)) {
333 switch (GST_EVENT_TYPE (data)) {
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 if (GST_IS_BUFFER (data))
349 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue,
350 "adding buffer %p of size %d", data, GST_BUFFER_SIZE (data));
352 if (queue->level_buffers == queue->size_buffers) {
353 g_mutex_unlock (queue->qlock);
354 g_signal_emit (G_OBJECT (queue), gst_queue_signals[FULL], 0);
355 g_mutex_lock (queue->qlock);
357 /* if this is a leaky queue... */
359 /* FIXME don't want to leak events! */
360 /* if we leak on the upstream side, drop the current buffer */
361 if (queue->leaky == GST_QUEUE_LEAK_UPSTREAM) {
362 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "queue is full, leaking buffer on upstream end");
363 if (GST_IS_EVENT (data))
364 fprintf(stderr, "Error: queue [%s] leaked an event, type:%d\n",
365 GST_ELEMENT_NAME(GST_ELEMENT(queue)),
366 GST_EVENT_TYPE(GST_EVENT(data)));
367 /* now we have to clean up and exit right away */
368 g_mutex_unlock (queue->qlock);
371 /* otherwise we have to push a buffer off the other end */
376 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "queue is full, leaking buffer on downstream end");
378 front = g_queue_pop_head (queue->queue);
379 leak = GST_DATA (front);
381 queue->level_buffers--;
382 if (GST_IS_EVENT (leak)) {
383 fprintf(stderr, "Error: queue [%s] leaked an event, type:%d\n",
384 GST_ELEMENT_NAME(GST_ELEMENT(queue)),
385 GST_EVENT_TYPE(GST_EVENT(leak)));
387 queue->level_bytes -= GST_BUFFER_SIZE(leak);
390 gst_data_unref (leak);
394 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "pre full wait, level:%d/%d buffers, %d bytes",
395 queue->level_buffers, queue->size_buffers, queue->level_bytes);
397 while (queue->level_buffers == queue->size_buffers) {
398 /* if there's a pending state change for this queue or its manager, switch */
399 /* back to iterator so bottom half of state change executes */
400 if (queue->interrupt) {
401 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "interrupted!!");
402 g_mutex_unlock (queue->qlock);
403 if (gst_scheduler_interrupt (gst_pad_get_scheduler (queue->sinkpad), GST_ELEMENT (queue)))
405 /* if we got here because we were unlocked after a flush, we don't need
406 * to add the buffer to the queue again */
408 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "not adding pending buffer after flush");
411 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "adding pending buffer after interrupt");
414 if (GST_STATE (queue) != GST_STATE_PLAYING) {
415 /* this means the other end is shut down */
416 /* try to signal to resolve the error */
417 if (!queue->may_deadlock) {
418 g_mutex_unlock (queue->qlock);
419 gst_data_unref (data);
420 gst_element_error (GST_ELEMENT (queue), "deadlock found, source pad elements are shut down");
421 /* we don't want to goto out_unref here, since we want to clean up before calling gst_element_error */
425 g_print ("%s: waiting for the app to restart source pad elements\n", GST_ELEMENT_NAME (queue));
429 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "waiting for not_full, level:%d/%d buffers, %d bytes",
430 queue->level_buffers, queue->size_buffers, queue->level_bytes);
431 g_cond_wait (queue->not_full, queue->qlock);
432 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "got not_full signal");
434 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "post full wait, level:%d/%d buffers, %d bytes",
435 queue->level_buffers, queue->size_buffers, queue->level_bytes);
438 /* put the buffer on the tail of the list */
439 g_queue_push_tail (queue->queue, data);
441 queue->level_buffers++;
442 if (GST_IS_BUFFER (data))
443 queue->level_bytes += GST_BUFFER_SIZE (data);
445 /* this assertion _has_ to hold */
446 g_assert (queue->queue->length == queue->level_buffers);
448 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "(%s:%s)+ level:%d/%d buffers, %d bytes",
449 GST_DEBUG_PAD_NAME(pad),
450 queue->level_buffers, queue->size_buffers, queue->level_bytes);
452 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "signalling not_empty");
453 g_cond_signal (queue->not_empty);
454 g_mutex_unlock (queue->qlock);
459 gst_data_unref (data);
464 gst_queue_get (GstPad *pad)
467 GstData *data = 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_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "locking t:%p", g_thread_self ());
480 g_mutex_lock (queue->qlock);
481 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "locked t:%p %p", g_thread_self (), queue->not_empty);
483 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "pre empty wait, level:%d/%d buffers, %d bytes",
484 queue->level_buffers, queue->size_buffers, queue->level_bytes);
485 while (queue->level_buffers == 0) {
486 /* if there's a pending state change for this queue or its manager, switch
487 * back to iterator so bottom half of state change executes
489 //while (GST_STATE_PENDING (queue) != GST_STATE_VOID_PENDING) {
490 if (queue->interrupt) {
491 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "interrupted!!");
492 g_mutex_unlock (queue->qlock);
493 if (gst_scheduler_interrupt (gst_pad_get_scheduler (queue->srcpad), GST_ELEMENT (queue)))
494 return GST_DATA (gst_event_new (GST_EVENT_INTERRUPT));
497 if (GST_STATE (queue) != GST_STATE_PLAYING) {
498 /* this means the other end is shut down */
499 if (!queue->may_deadlock) {
500 g_mutex_unlock (queue->qlock);
501 gst_element_error (GST_ELEMENT (queue), "deadlock found, sink pad elements are shut down");
505 g_print ("%s: waiting for the app to restart source pad elements\n", GST_ELEMENT_NAME (queue));
509 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "waiting for not_empty, level:%d/%d buffers, %d bytes",
510 queue->level_buffers, queue->size_buffers, queue->level_bytes);
512 /* if (queue->block_timeout > -1){ */
515 g_get_current_time(&timeout);
516 g_time_val_add(&timeout, queue->block_timeout);
517 if (!g_cond_timed_wait (queue->not_empty, queue->qlock, &timeout)){
518 g_mutex_unlock (queue->qlock);
519 g_warning ("filler");
520 return GST_DATA (gst_event_new_filler());
524 g_cond_wait (queue->not_empty, queue->qlock);
526 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "got not_empty signal");
528 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "post empty wait, level:%d/%d buffers, %d bytes",
529 queue->level_buffers, queue->size_buffers, queue->level_bytes);
531 front = g_queue_pop_head (queue->queue);
532 data = GST_DATA (front);
533 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "retrieved data %p from queue", data);
535 queue->level_buffers--;
536 if (GST_IS_BUFFER (data))
537 queue->level_bytes -= GST_BUFFER_SIZE (data);
539 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "(%s:%s)- level:%d/%d buffers, %d bytes",
540 GST_DEBUG_PAD_NAME(pad),
541 queue->level_buffers, queue->size_buffers, queue->level_bytes);
543 /* this assertion _has_ to hold */
544 g_assert (queue->queue->length == queue->level_buffers);
546 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "signalling not_full");
547 g_cond_signal (queue->not_full);
549 g_mutex_unlock (queue->qlock);
551 /* FIXME where should this be? locked? */
552 if (GST_IS_EVENT (data)) {
553 GstEvent *event = GST_EVENT (data);
554 switch (GST_EVENT_TYPE(event)) {
556 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "queue \"%s\" eos", GST_ELEMENT_NAME (queue));
557 gst_element_set_eos (GST_ELEMENT (queue));
569 gst_queue_handle_src_event (GstPad *pad, GstEvent *event)
576 queue = GST_QUEUE (GST_OBJECT_PARENT (pad));
578 g_mutex_lock (queue->qlock);
580 if (gst_element_get_state (GST_ELEMENT (queue)) == GST_STATE_PLAYING) {
581 /* push the event to the queue for upstream consumption */
582 g_async_queue_push(queue->events, event);
583 g_warning ("FIXME: sending event in a running queue");
584 /* FIXME wait for delivery of the event here, then return the result
585 * instead of FALSE */
590 event_type = GST_EVENT_TYPE (event);
591 if (event_type == GST_EVENT_SEEK)
592 flag_flush = GST_EVENT_SEEK_FLAGS (event) & GST_SEEK_FLAG_FLUSH;
594 res = gst_pad_event_default (pad, event);
596 switch (event_type) {
597 case GST_EVENT_FLUSH:
598 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "FLUSH event, flushing queue\n");
599 gst_queue_locked_flush (queue);
603 gst_queue_locked_flush (queue);
610 g_mutex_unlock (queue->qlock);
612 /* we have to claim success, but we don't really know */
617 gst_queue_release_locks (GstElement *element)
621 queue = GST_QUEUE (element);
623 g_mutex_lock (queue->qlock);
624 queue->interrupt = TRUE;
625 g_cond_signal (queue->not_full);
626 g_cond_signal (queue->not_empty);
627 g_mutex_unlock (queue->qlock);
632 static GstElementStateReturn
633 gst_queue_change_state (GstElement *element)
636 GstElementStateReturn ret;
638 queue = GST_QUEUE (element);
640 GST_CAT_LOG_OBJECT (GST_CAT_STATES, element, "starting state change");
642 /* lock the queue so another thread (not in sync with this thread's state)
643 * can't call this queue's _get (or whatever)
645 g_mutex_lock (queue->qlock);
647 switch (GST_STATE_TRANSITION (element)) {
648 case GST_STATE_NULL_TO_READY:
649 gst_queue_locked_flush (queue);
651 case GST_STATE_READY_TO_PAUSED:
653 case GST_STATE_PAUSED_TO_PLAYING:
654 if (!GST_PAD_IS_LINKED (queue->sinkpad)) {
655 GST_CAT_DEBUG_OBJECT (GST_CAT_STATES, queue, "queue %s is not linked", GST_ELEMENT_NAME (queue));
656 /* FIXME can this be? */
657 g_cond_signal (queue->not_empty);
659 ret = GST_STATE_FAILURE;
663 GstScheduler *src_sched, *sink_sched;
665 src_sched = gst_pad_get_scheduler (GST_PAD_CAST (queue->srcpad));
666 sink_sched = gst_pad_get_scheduler (GST_PAD_CAST (queue->sinkpad));
668 if (src_sched == sink_sched) {
669 GST_CAT_DEBUG_OBJECT (GST_CAT_STATES, queue, "queue %s does not connect different schedulers",
670 GST_ELEMENT_NAME (queue));
672 g_warning ("queue %s does not connect different schedulers",
673 GST_ELEMENT_NAME (queue));
675 ret = GST_STATE_FAILURE;
679 queue->interrupt = FALSE;
681 case GST_STATE_PLAYING_TO_PAUSED:
683 case GST_STATE_PAUSED_TO_READY:
684 gst_queue_locked_flush (queue);
686 case GST_STATE_READY_TO_NULL:
690 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element);
693 g_mutex_unlock (queue->qlock);
695 GST_CAT_LOG_OBJECT (GST_CAT_STATES, element, "done with state change");
701 gst_queue_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
705 /* it's not null if we got it, but it might not be ours */
706 g_return_if_fail (GST_IS_QUEUE (object));
708 queue = GST_QUEUE (object);
712 queue->leaky = g_value_get_enum (value);
715 queue->size_buffers = g_value_get_int (value);
717 case ARG_MIN_THRESHOLD_BYTES:
718 queue->min_threshold_bytes = g_value_get_int (value);
720 case ARG_MAY_DEADLOCK:
721 queue->may_deadlock = g_value_get_boolean (value);
723 case ARG_BLOCK_TIMEOUT:
724 queue->block_timeout = g_value_get_int (value);
727 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
733 gst_queue_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
737 /* it's not null if we got it, but it might not be ours */
738 g_return_if_fail (GST_IS_QUEUE (object));
740 queue = GST_QUEUE (object);
744 g_value_set_enum (value, queue->leaky);
747 g_value_set_int (value, queue->level_buffers);
750 g_value_set_int (value, queue->size_buffers);
752 case ARG_MIN_THRESHOLD_BYTES:
753 g_value_set_int (value, queue->min_threshold_bytes);
755 case ARG_MAY_DEADLOCK:
756 g_value_set_boolean (value, queue->may_deadlock);
758 case ARG_BLOCK_TIMEOUT:
759 g_value_set_int (value, queue->block_timeout);
762 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);