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 */
70 ARG_MIN_THRESHOLD_BYTES,
76 static void gst_queue_class_init (GstQueueClass *klass);
77 static void gst_queue_init (GstQueue *queue);
78 static void gst_queue_dispose (GObject *object);
80 static void gst_queue_set_property (GObject *object, guint prop_id,
81 const GValue *value, GParamSpec *pspec);
82 static void gst_queue_get_property (GObject *object, guint prop_id,
83 GValue *value, GParamSpec *pspec);
85 static void gst_queue_chain (GstPad *pad, GstBuffer *buf);
86 static GstBuffer * gst_queue_get (GstPad *pad);
87 static GstBufferPool* gst_queue_get_bufferpool (GstPad *pad);
89 static gboolean gst_queue_handle_src_event (GstPad *pad, GstEvent *event);
92 static void gst_queue_locked_flush (GstQueue *queue);
94 static GstElementStateReturn gst_queue_change_state (GstElement *element);
95 static gboolean gst_queue_release_locks (GstElement *element);
98 #define GST_TYPE_QUEUE_LEAKY (queue_leaky_get_type())
100 queue_leaky_get_type(void) {
101 static GType queue_leaky_type = 0;
102 static GEnumValue queue_leaky[] = {
103 { GST_QUEUE_NO_LEAK, "0", "Not Leaky" },
104 { GST_QUEUE_LEAK_UPSTREAM, "1", "Leaky on Upstream" },
105 { GST_QUEUE_LEAK_DOWNSTREAM, "2", "Leaky on Downstream" },
108 if (!queue_leaky_type) {
109 queue_leaky_type = g_enum_register_static("GstQueueLeaky", queue_leaky);
111 return queue_leaky_type;
114 static GstElementClass *parent_class = NULL;
115 static guint gst_queue_signals[LAST_SIGNAL] = { 0 };
118 gst_queue_get_type(void)
120 static GType queue_type = 0;
123 static const GTypeInfo queue_info = {
124 sizeof(GstQueueClass),
127 (GClassInitFunc)gst_queue_class_init,
132 (GInstanceInitFunc)gst_queue_init,
135 queue_type = g_type_register_static (GST_TYPE_ELEMENT, "GstQueue", &queue_info, 0);
141 gst_queue_class_init (GstQueueClass *klass)
143 GObjectClass *gobject_class;
144 GstElementClass *gstelement_class;
146 gobject_class = (GObjectClass*)klass;
147 gstelement_class = (GstElementClass*)klass;
149 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
151 gst_queue_signals[FULL] =
152 g_signal_new ("full", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
153 G_STRUCT_OFFSET (GstQueueClass, full), NULL, NULL,
154 g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
155 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LEAKY,
156 g_param_spec_enum ("leaky", "Leaky", "Where the queue leaks, if at all.",
157 GST_TYPE_QUEUE_LEAKY, GST_QUEUE_NO_LEAK, G_PARAM_READWRITE));
158 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LEVEL,
159 g_param_spec_int ("level", "Level", "How many buffers are in the queue.",
160 0, G_MAXINT, 0, G_PARAM_READABLE));
161 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MAX_LEVEL,
162 g_param_spec_int ("max_level", "Maximum Level", "How many buffers the queue holds.",
163 0, G_MAXINT, 100, G_PARAM_READWRITE));
164 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MIN_THRESHOLD_BYTES,
165 g_param_spec_int ("min_threshold_bytes", "Minimum Threshold",
166 "Minimum bytes required before signalling not_empty to reader.",
167 0, G_MAXINT, 0, G_PARAM_READWRITE));
168 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MAY_DEADLOCK,
169 g_param_spec_boolean ("may_deadlock", "May Deadlock", "The queue may deadlock if it's full and not PLAYING",
170 TRUE, G_PARAM_READWRITE));
171 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BLOCK_TIMEOUT,
172 g_param_spec_int ("block_timeout", "Timeout for Block",
173 "Microseconds until blocked queue times out and returns filler event. "
174 "Value of -1 disables timeout",
175 -1, G_MAXINT, -1, G_PARAM_READWRITE));
177 gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_queue_dispose);
178 gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_queue_set_property);
179 gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_queue_get_property);
181 gstelement_class->change_state = GST_DEBUG_FUNCPTR(gst_queue_change_state);
182 gstelement_class->release_locks = GST_DEBUG_FUNCPTR(gst_queue_release_locks);
185 static GstPadLinkReturn
186 gst_queue_link (GstPad *pad, GstCaps *caps)
188 GstQueue *queue = GST_QUEUE (gst_pad_get_parent (pad));
191 if (pad == queue->srcpad)
192 otherpad = queue->sinkpad;
194 otherpad = queue->srcpad;
196 return gst_pad_proxy_link (otherpad, caps);
200 gst_queue_getcaps (GstPad *pad, GstCaps *caps)
202 GstQueue *queue = GST_QUEUE (gst_pad_get_parent (pad));
205 if (pad == queue->srcpad)
206 otherpad = GST_PAD_PEER (queue->sinkpad);
208 otherpad = GST_PAD_PEER (queue->srcpad);
211 return gst_pad_get_caps (otherpad);
217 gst_queue_init (GstQueue *queue)
219 /* scheduling on this kind of element is, well, interesting */
220 GST_FLAG_SET (queue, GST_ELEMENT_DECOUPLED);
221 GST_FLAG_SET (queue, GST_ELEMENT_EVENT_AWARE);
223 queue->sinkpad = gst_pad_new ("sink", GST_PAD_SINK);
224 gst_pad_set_chain_function (queue->sinkpad, GST_DEBUG_FUNCPTR (gst_queue_chain));
225 gst_element_add_pad (GST_ELEMENT (queue), queue->sinkpad);
226 gst_pad_set_bufferpool_function (queue->sinkpad, GST_DEBUG_FUNCPTR (gst_queue_get_bufferpool));
227 gst_pad_set_link_function (queue->sinkpad, GST_DEBUG_FUNCPTR (gst_queue_link));
228 gst_pad_set_getcaps_function (queue->sinkpad, GST_DEBUG_FUNCPTR (gst_queue_getcaps));
230 queue->srcpad = gst_pad_new ("src", GST_PAD_SRC);
231 gst_pad_set_get_function (queue->srcpad, GST_DEBUG_FUNCPTR (gst_queue_get));
232 gst_element_add_pad (GST_ELEMENT (queue), queue->srcpad);
233 gst_pad_set_link_function (queue->srcpad, GST_DEBUG_FUNCPTR (gst_queue_link));
234 gst_pad_set_getcaps_function (queue->srcpad, GST_DEBUG_FUNCPTR (gst_queue_getcaps));
235 gst_pad_set_event_function (queue->srcpad, GST_DEBUG_FUNCPTR (gst_queue_handle_src_event));
237 queue->leaky = GST_QUEUE_NO_LEAK;
239 queue->level_buffers = 0;
240 queue->level_bytes = 0;
241 queue->level_time = G_GINT64_CONSTANT (0);
242 queue->size_buffers = 100; /* 100 buffers */
243 queue->size_bytes = 100 * 1024; /* 100KB */
244 queue->size_time = GST_SECOND; /* 1sec */
245 queue->min_threshold_bytes = 0;
246 queue->may_deadlock = TRUE;
247 queue->block_timeout = -1;
248 queue->interrupt = FALSE;
249 queue->flush = FALSE;
251 queue->qlock = g_mutex_new ();
252 queue->not_empty = g_cond_new ();
253 queue->not_full = g_cond_new ();
254 queue->events = g_async_queue_new();
255 queue->queue = g_queue_new ();
256 GST_DEBUG_ELEMENT (GST_CAT_THREAD, queue, "initialized queue's not_empty & not_full conditions");
260 gst_queue_dispose (GObject *object)
262 GstQueue *queue = GST_QUEUE (object);
264 gst_element_set_state (GST_ELEMENT (queue), GST_STATE_NULL);
266 g_mutex_free (queue->qlock);
267 g_cond_free (queue->not_empty);
268 g_cond_free (queue->not_full);
269 g_queue_free (queue->queue);
271 g_async_queue_unref(queue->events);
273 G_OBJECT_CLASS (parent_class)->dispose (object);
276 static GstBufferPool*
277 gst_queue_get_bufferpool (GstPad *pad)
281 queue = GST_QUEUE (GST_OBJECT_PARENT (pad));
283 return gst_pad_get_bufferpool (queue->srcpad);
287 gst_queue_cleanup_data (gpointer data, const gpointer user_data)
289 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, user_data, "cleaning buffer %p", data);
291 gst_data_unref (GST_DATA (data));
295 gst_queue_locked_flush (GstQueue *queue)
299 while ((data = g_queue_pop_head (queue->queue))) {
300 gst_queue_cleanup_data (data, (gpointer) queue);
302 queue->timeval = NULL;
303 queue->level_buffers = 0;
304 queue->level_bytes = 0;
305 queue->level_time = G_GINT64_CONSTANT (0);
306 /* make sure any pending buffers to be added are flushed too */
308 /* signal not_full, since we apparently aren't full anymore */
309 g_cond_signal (queue->not_full);
313 gst_queue_chain (GstPad *pad, GstBuffer *buf)
317 g_return_if_fail (pad != NULL);
318 g_return_if_fail (GST_IS_PAD (pad));
319 g_return_if_fail (buf != NULL);
321 queue = GST_QUEUE (GST_OBJECT_PARENT (pad));
323 /* check for events to send upstream */
324 g_async_queue_lock(queue->events);
325 while (g_async_queue_length_unlocked(queue->events) > 0){
326 GstEvent *event = (GstEvent*)g_async_queue_pop_unlocked(queue->events);
327 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "sending event upstream\n");
328 gst_pad_event_default (pad, event);
329 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "event sent\n");
331 g_async_queue_unlock(queue->events);
334 /* we have to lock the queue since we span threads */
335 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "locking t:%p", g_thread_self ());
336 g_mutex_lock (queue->qlock);
337 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "locked t:%p", g_thread_self ());
339 /* assume don't need to flush this buffer when the queue is filled */
340 queue->flush = FALSE;
342 if (GST_IS_EVENT (buf)) {
343 switch (GST_EVENT_TYPE (buf)) {
344 case GST_EVENT_FLUSH:
345 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "FLUSH event, flushing queue\n");
346 gst_queue_locked_flush (queue);
349 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "eos in on %s %d\n",
350 GST_ELEMENT_NAME (queue), queue->level_buffers);
353 /* we put the event in the queue, we don't have to act ourselves */
358 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "adding buffer %p of size %d",buf,GST_BUFFER_SIZE(buf));
360 if (queue->level_buffers == queue->size_buffers) {
361 g_mutex_unlock (queue->qlock);
362 g_signal_emit (G_OBJECT (queue), gst_queue_signals[FULL], 0);
363 g_mutex_lock (queue->qlock);
365 /* if this is a leaky queue... */
367 /* FIXME don't want to leak events! */
368 /* if we leak on the upstream side, drop the current buffer */
369 if (queue->leaky == GST_QUEUE_LEAK_UPSTREAM) {
370 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "queue is full, leaking buffer on upstream end");
371 if (GST_IS_EVENT (buf))
372 fprintf(stderr, "Error: queue [%s] leaked an event, type:%d\n",
373 GST_ELEMENT_NAME(GST_ELEMENT(queue)),
374 GST_EVENT_TYPE(GST_EVENT(buf)));
375 /* now we have to clean up and exit right away */
376 g_mutex_unlock (queue->qlock);
379 /* otherwise we have to push a buffer off the other end */
384 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "queue is full, leaking buffer on downstream end");
386 front = g_queue_pop_head (queue->queue);
387 leakbuf = (GstBuffer *)(front);
389 if (GST_IS_EVENT (leakbuf)) {
390 fprintf(stderr, "Error: queue [%s] leaked an event, type:%d\n",
391 GST_ELEMENT_NAME(GST_ELEMENT(queue)),
392 GST_EVENT_TYPE(GST_EVENT(leakbuf)));
394 queue->level_buffers--;
395 queue->level_bytes -= GST_BUFFER_SIZE(leakbuf);
396 gst_data_unref (GST_DATA (leakbuf));
400 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "pre full wait, level:%d/%d buffers, %d bytes",
401 queue->level_buffers, queue->size_buffers, queue->level_bytes);
403 while (queue->level_buffers == queue->size_buffers) {
404 /* if there's a pending state change for this queue or its manager, switch */
405 /* back to iterator so bottom half of state change executes */
406 if (queue->interrupt) {
407 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "interrupted!!");
408 g_mutex_unlock (queue->qlock);
409 if (gst_scheduler_interrupt (gst_pad_get_scheduler (queue->sinkpad), GST_ELEMENT (queue)))
411 /* if we got here because we were unlocked after a flush, we don't need
412 * to add the buffer to the queue again */
414 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "not adding pending buffer after flush");
417 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "adding pending buffer after interrupt");
420 if (GST_STATE (queue) != GST_STATE_PLAYING) {
421 /* this means the other end is shut down */
422 /* try to signal to resolve the error */
423 if (!queue->may_deadlock) {
424 g_mutex_unlock (queue->qlock);
425 gst_data_unref (GST_DATA (buf));
426 gst_element_error (GST_ELEMENT (queue), "deadlock found, source pad elements are shut down");
427 /* we don't want to goto out_unref here, since we want to clean up before calling gst_element_error */
431 g_print ("%s: waiting for the app to restart source pad elements\n", GST_ELEMENT_NAME (queue));
435 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "waiting for not_full, level:%d/%d buffers, %d bytes",
436 queue->level_buffers, queue->size_buffers, queue->level_bytes);
437 g_cond_wait (queue->not_full, queue->qlock);
438 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "got not_full signal");
440 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "post full wait, level:%d/%d buffers, %d bytes",
441 queue->level_buffers, queue->size_buffers, queue->level_bytes);
444 /* put the buffer on the tail of the list */
445 g_queue_push_tail (queue->queue, buf);
447 queue->level_buffers++;
448 queue->level_bytes += GST_BUFFER_SIZE(buf);
450 /* this assertion _has_ to hold */
451 g_assert (queue->queue->length == queue->level_buffers);
453 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "(%s:%s)+ level:%d/%d buffers, %d bytes",
454 GST_DEBUG_PAD_NAME(pad),
455 queue->level_buffers, queue->size_buffers, queue->level_bytes);
457 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "signalling not_empty");
458 g_cond_signal (queue->not_empty);
459 g_mutex_unlock (queue->qlock);
464 gst_data_unref (GST_DATA (buf));
469 gst_queue_get (GstPad *pad)
472 GstBuffer *buf = NULL;
475 g_assert(pad != NULL);
476 g_assert(GST_IS_PAD(pad));
477 g_return_val_if_fail (pad != NULL, NULL);
478 g_return_val_if_fail (GST_IS_PAD (pad), NULL);
480 queue = GST_QUEUE (GST_OBJECT_PARENT (pad));
483 /* have to lock for thread-safety */
484 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "locking t:%p", g_thread_self ());
485 g_mutex_lock (queue->qlock);
486 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "locked t:%p %p", g_thread_self (), queue->not_empty);
488 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "pre empty wait, level:%d/%d buffers, %d bytes",
489 queue->level_buffers, queue->size_buffers, queue->level_bytes);
490 while (queue->level_buffers == 0) {
491 /* if there's a pending state change for this queue or its manager, switch
492 * back to iterator so bottom half of state change executes
494 //while (GST_STATE_PENDING (queue) != GST_STATE_VOID_PENDING) {
495 if (queue->interrupt) {
496 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "interrupted!!");
497 g_mutex_unlock (queue->qlock);
498 if (gst_scheduler_interrupt (gst_pad_get_scheduler (queue->srcpad), GST_ELEMENT (queue)))
499 return GST_BUFFER (gst_event_new (GST_EVENT_INTERRUPT));
502 if (GST_STATE (queue) != GST_STATE_PLAYING) {
503 /* this means the other end is shut down */
504 if (!queue->may_deadlock) {
505 g_mutex_unlock (queue->qlock);
506 gst_element_error (GST_ELEMENT (queue), "deadlock found, sink pad elements are shut down");
510 g_print ("%s: waiting for the app to restart source pad elements\n", GST_ELEMENT_NAME (queue));
514 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "waiting for not_empty, level:%d/%d buffers, %d bytes",
515 queue->level_buffers, queue->size_buffers, queue->level_bytes);
517 /* if (queue->block_timeout > -1){ */
520 g_get_current_time(&timeout);
521 g_time_val_add(&timeout, queue->block_timeout);
522 if (!g_cond_timed_wait (queue->not_empty, queue->qlock, &timeout)){
523 g_mutex_unlock (queue->qlock);
524 g_warning ("filler");
525 return GST_BUFFER(gst_event_new_filler());
529 g_cond_wait (queue->not_empty, queue->qlock);
531 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "got not_empty signal");
533 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "post empty wait, level:%d/%d buffers, %d bytes",
534 queue->level_buffers, queue->size_buffers, queue->level_bytes);
536 front = g_queue_pop_head (queue->queue);
537 buf = (GstBuffer *)(front);
538 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "retrieved buffer %p from queue", buf);
540 queue->level_buffers--;
541 queue->level_bytes -= GST_BUFFER_SIZE(buf);
543 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "(%s:%s)- level:%d/%d buffers, %d bytes",
544 GST_DEBUG_PAD_NAME(pad),
545 queue->level_buffers, queue->size_buffers, queue->level_bytes);
547 /* this assertion _has_ to hold */
548 g_assert (queue->queue->length == queue->level_buffers);
550 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "signalling not_full");
551 g_cond_signal (queue->not_full);
553 g_mutex_unlock (queue->qlock);
555 /* FIXME where should this be? locked? */
556 if (GST_IS_EVENT(buf)) {
557 GstEvent *event = GST_EVENT(buf);
558 switch (GST_EVENT_TYPE(event)) {
560 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "queue \"%s\" eos", GST_ELEMENT_NAME (queue));
561 gst_element_set_eos (GST_ELEMENT (queue));
573 gst_queue_handle_src_event (GstPad *pad, GstEvent *event)
580 queue = GST_QUEUE (GST_OBJECT_PARENT (pad));
582 g_mutex_lock (queue->qlock);
584 if (gst_element_get_state (GST_ELEMENT (queue)) == GST_STATE_PLAYING) {
585 /* push the event to the queue for upstream consumption */
586 g_async_queue_push(queue->events, event);
587 g_warning ("FIXME: sending event in a running queue");
588 /* FIXME wait for delivery of the event here, then return the result
589 * instead of FALSE */
594 event_type = GST_EVENT_TYPE (event);
595 if (event_type == GST_EVENT_SEEK)
596 flag_flush = GST_EVENT_SEEK_FLAGS (event) & GST_SEEK_FLAG_FLUSH;
598 res = gst_pad_event_default (pad, event);
600 switch (event_type) {
601 case GST_EVENT_FLUSH:
602 GST_DEBUG_ELEMENT (GST_CAT_DATAFLOW, queue, "FLUSH event, flushing queue\n");
603 gst_queue_locked_flush (queue);
607 gst_queue_locked_flush (queue);
614 g_mutex_unlock (queue->qlock);
616 /* we have to claim success, but we don't really know */
621 gst_queue_release_locks (GstElement *element)
625 queue = GST_QUEUE (element);
627 g_mutex_lock (queue->qlock);
628 queue->interrupt = TRUE;
629 g_cond_signal (queue->not_full);
630 g_cond_signal (queue->not_empty);
631 g_mutex_unlock (queue->qlock);
636 static GstElementStateReturn
637 gst_queue_change_state (GstElement *element)
640 GstElementStateReturn ret;
642 queue = GST_QUEUE (element);
644 GST_DEBUG_ENTER("('%s')", GST_ELEMENT_NAME (element));
646 /* lock the queue so another thread (not in sync with this thread's state)
647 * can't call this queue's _get (or whatever)
649 g_mutex_lock (queue->qlock);
651 switch (GST_STATE_TRANSITION (element)) {
652 case GST_STATE_NULL_TO_READY:
653 gst_queue_locked_flush (queue);
655 case GST_STATE_READY_TO_PAUSED:
657 case GST_STATE_PAUSED_TO_PLAYING:
658 if (!GST_PAD_IS_LINKED (queue->sinkpad)) {
659 GST_DEBUG_ELEMENT (GST_CAT_STATES, queue, "queue %s is not linked", GST_ELEMENT_NAME (queue));
660 /* FIXME can this be? */
661 g_cond_signal (queue->not_empty);
663 ret = GST_STATE_FAILURE;
667 GstScheduler *src_sched, *sink_sched;
669 src_sched = gst_pad_get_scheduler (GST_PAD_CAST (queue->srcpad));
670 sink_sched = gst_pad_get_scheduler (GST_PAD_CAST (queue->sinkpad));
672 if (src_sched == sink_sched) {
673 GST_DEBUG_ELEMENT (GST_CAT_STATES, queue, "queue %s does not connect different schedulers",
674 GST_ELEMENT_NAME (queue));
676 g_warning ("queue %s does not connect different schedulers",
677 GST_ELEMENT_NAME (queue));
679 ret = GST_STATE_FAILURE;
683 queue->interrupt = FALSE;
685 case GST_STATE_PLAYING_TO_PAUSED:
687 case GST_STATE_PAUSED_TO_READY:
688 gst_queue_locked_flush (queue);
690 case GST_STATE_READY_TO_NULL:
694 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element);
697 g_mutex_unlock (queue->qlock);
699 GST_DEBUG_LEAVE("('%s')", GST_ELEMENT_NAME (element));
705 gst_queue_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
709 /* it's not null if we got it, but it might not be ours */
710 g_return_if_fail (GST_IS_QUEUE (object));
712 queue = GST_QUEUE (object);
716 queue->leaky = g_value_get_enum (value);
719 queue->size_buffers = g_value_get_int (value);
721 case ARG_MIN_THRESHOLD_BYTES:
722 queue->min_threshold_bytes = g_value_get_int (value);
724 case ARG_MAY_DEADLOCK:
725 queue->may_deadlock = g_value_get_boolean (value);
727 case ARG_BLOCK_TIMEOUT:
728 queue->block_timeout = g_value_get_int (value);
731 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
737 gst_queue_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
741 /* it's not null if we got it, but it might not be ours */
742 g_return_if_fail (GST_IS_QUEUE (object));
744 queue = GST_QUEUE (object);
748 g_value_set_enum (value, queue->leaky);
751 g_value_set_int (value, queue->level_buffers);
754 g_value_set_int (value, queue->size_buffers);
756 case ARG_MIN_THRESHOLD_BYTES:
757 g_value_set_int (value, queue->min_threshold_bytes);
759 case ARG_MAY_DEADLOCK:
760 g_value_set_boolean (value, queue->may_deadlock);
762 case ARG_BLOCK_TIMEOUT:
763 g_value_set_int (value, queue->block_timeout);
766 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);