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 static GstElementDetails gst_queue_details = GST_ELEMENT_DETAILS (
36 "Erik Walthinsen <omega@cse.ogi.edu>"
40 /* Queue signals and args */
57 ARG_MIN_THRESHOLD_BYTES,
62 static void gst_queue_base_init (gpointer g_class);
63 static void gst_queue_class_init (gpointer g_class,
65 static void gst_queue_init (GTypeInstance *instance,
67 static void gst_queue_dispose (GObject *object);
69 static void gst_queue_set_property (GObject *object, guint prop_id,
70 const GValue *value, GParamSpec *pspec);
71 static void gst_queue_get_property (GObject *object, guint prop_id,
72 GValue *value, GParamSpec *pspec);
74 static void gst_queue_chain (GstPad *pad, GstData *data);
75 static GstData * gst_queue_get (GstPad *pad);
76 static GstBufferPool* gst_queue_get_bufferpool (GstPad *pad);
78 static gboolean gst_queue_handle_src_event (GstPad *pad, GstEvent *event);
81 static void gst_queue_locked_flush (GstQueue *queue);
83 static GstElementStateReturn gst_queue_change_state (GstElement *element);
84 static gboolean gst_queue_release_locks (GstElement *element);
87 #define GST_TYPE_QUEUE_LEAKY (queue_leaky_get_type())
89 queue_leaky_get_type(void) {
90 static GType queue_leaky_type = 0;
91 static GEnumValue queue_leaky[] = {
92 { GST_QUEUE_NO_LEAK, "0", "Not Leaky" },
93 { GST_QUEUE_LEAK_UPSTREAM, "1", "Leaky on Upstream" },
94 { GST_QUEUE_LEAK_DOWNSTREAM, "2", "Leaky on Downstream" },
97 if (!queue_leaky_type) {
98 queue_leaky_type = g_enum_register_static("GstQueueLeaky", queue_leaky);
100 return queue_leaky_type;
103 static GstElementClass *parent_class = NULL;
104 static guint gst_queue_signals[LAST_SIGNAL] = { 0 };
107 gst_queue_get_type(void)
109 static GType queue_type = 0;
112 static const GTypeInfo queue_info = {
113 sizeof(GstQueueClass),
116 gst_queue_class_init,
124 queue_type = g_type_register_static (GST_TYPE_ELEMENT, "GstQueue", &queue_info, 0);
130 gst_queue_base_init (gpointer g_class)
132 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
134 gst_element_class_set_details (gstelement_class, &gst_queue_details);
138 gst_queue_class_init (gpointer g_class, gpointer class_data)
140 GObjectClass *gobject_class = G_OBJECT_CLASS (g_class);
141 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
142 GstQueueClass *gstqueue_class = GST_QUEUE_CLASS (g_class);
144 parent_class = g_type_class_peek_parent (g_class);
146 gst_queue_signals[FULL] =
147 g_signal_new ("full", G_TYPE_FROM_CLASS (gstqueue_class), G_SIGNAL_RUN_FIRST,
148 G_STRUCT_OFFSET (GstQueueClass, full), NULL, NULL,
149 g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
150 g_object_class_install_property (G_OBJECT_CLASS (gstqueue_class), ARG_LEAKY,
151 g_param_spec_enum ("leaky", "Leaky", "Where the queue leaks, if at all.",
152 GST_TYPE_QUEUE_LEAKY, GST_QUEUE_NO_LEAK, G_PARAM_READWRITE));
153 g_object_class_install_property (G_OBJECT_CLASS (gstqueue_class), ARG_LEVEL,
154 g_param_spec_int ("level", "Level", "How many buffers are in the queue.",
155 0, G_MAXINT, 0, G_PARAM_READABLE));
156 g_object_class_install_property (G_OBJECT_CLASS (gstqueue_class), ARG_MAX_LEVEL,
157 g_param_spec_int ("max_level", "Maximum Level", "How many buffers the queue holds.",
158 0, G_MAXINT, 100, G_PARAM_READWRITE));
159 g_object_class_install_property (G_OBJECT_CLASS (gstqueue_class), ARG_MIN_THRESHOLD_BYTES,
160 g_param_spec_int ("min_threshold_bytes", "Minimum Threshold",
161 "Minimum bytes required before signalling not_empty to reader.",
162 0, G_MAXINT, 0, G_PARAM_READWRITE));
163 g_object_class_install_property (G_OBJECT_CLASS (gstqueue_class), 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 (gstqueue_class), 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 (GTypeInstance *instance, gpointer g_class)
214 GstQueue *queue = GST_QUEUE (instance);
216 /* scheduling on this kind of element is, well, interesting */
217 GST_FLAG_SET (queue, GST_ELEMENT_DECOUPLED);
218 GST_FLAG_SET (queue, GST_ELEMENT_EVENT_AWARE);
220 queue->sinkpad = gst_pad_new ("sink", GST_PAD_SINK);
221 gst_pad_set_chain_function (queue->sinkpad, GST_DEBUG_FUNCPTR (gst_queue_chain));
222 gst_element_add_pad (GST_ELEMENT (queue), queue->sinkpad);
223 gst_pad_set_bufferpool_function (queue->sinkpad, GST_DEBUG_FUNCPTR (gst_queue_get_bufferpool));
224 gst_pad_set_link_function (queue->sinkpad, GST_DEBUG_FUNCPTR (gst_queue_link));
225 gst_pad_set_getcaps_function (queue->sinkpad, GST_DEBUG_FUNCPTR (gst_queue_getcaps));
227 queue->srcpad = gst_pad_new ("src", GST_PAD_SRC);
228 gst_pad_set_get_function (queue->srcpad, GST_DEBUG_FUNCPTR (gst_queue_get));
229 gst_element_add_pad (GST_ELEMENT (queue), queue->srcpad);
230 gst_pad_set_link_function (queue->srcpad, GST_DEBUG_FUNCPTR (gst_queue_link));
231 gst_pad_set_getcaps_function (queue->srcpad, GST_DEBUG_FUNCPTR (gst_queue_getcaps));
232 gst_pad_set_event_function (queue->srcpad, GST_DEBUG_FUNCPTR (gst_queue_handle_src_event));
234 queue->leaky = GST_QUEUE_NO_LEAK;
236 queue->level_buffers = 0;
237 queue->level_bytes = 0;
238 queue->level_time = G_GINT64_CONSTANT (0);
239 queue->size_buffers = 100; /* 100 buffers */
240 queue->size_bytes = 100 * 1024; /* 100KB */
241 queue->size_time = GST_SECOND; /* 1sec */
242 queue->min_threshold_bytes = 0;
243 queue->may_deadlock = TRUE;
244 queue->block_timeout = -1;
245 queue->interrupt = FALSE;
246 queue->flush = FALSE;
248 queue->qlock = g_mutex_new ();
249 queue->not_empty = g_cond_new ();
250 queue->not_full = g_cond_new ();
251 queue->events = g_async_queue_new();
252 queue->queue = g_queue_new ();
253 GST_CAT_DEBUG_OBJECT (GST_CAT_THREAD, queue, "initialized queue's not_empty & not_full conditions");
257 gst_queue_dispose (GObject *object)
259 GstQueue *queue = GST_QUEUE (object);
261 gst_element_set_state (GST_ELEMENT (queue), GST_STATE_NULL);
263 g_mutex_free (queue->qlock);
264 g_cond_free (queue->not_empty);
265 g_cond_free (queue->not_full);
266 g_queue_free (queue->queue);
268 g_async_queue_unref(queue->events);
270 G_OBJECT_CLASS (parent_class)->dispose (object);
273 static GstBufferPool*
274 gst_queue_get_bufferpool (GstPad *pad)
278 queue = GST_QUEUE (GST_OBJECT_PARENT (pad));
280 return gst_pad_get_bufferpool (queue->srcpad);
284 gst_queue_cleanup_data (gpointer data, const gpointer user_data)
286 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, user_data, "cleaning buffer %p", data);
288 gst_data_unref (GST_DATA (data));
292 gst_queue_locked_flush (GstQueue *queue)
296 while ((data = g_queue_pop_head (queue->queue))) {
297 gst_queue_cleanup_data (data, (gpointer) queue);
299 queue->timeval = NULL;
300 queue->level_buffers = 0;
301 queue->level_bytes = 0;
302 queue->level_time = G_GINT64_CONSTANT (0);
303 /* make sure any pending buffers to be added are flushed too */
305 /* signal not_full, since we apparently aren't full anymore */
306 g_cond_signal (queue->not_full);
310 gst_queue_chain (GstPad *pad, GstData *data)
314 g_return_if_fail (pad != NULL);
315 g_return_if_fail (GST_IS_PAD (pad));
316 g_return_if_fail (data != NULL);
318 queue = GST_QUEUE (GST_OBJECT_PARENT (pad));
320 /* check for events to send upstream */
321 g_async_queue_lock(queue->events);
322 while (g_async_queue_length_unlocked(queue->events) > 0){
323 GstEvent *event = (GstEvent*)g_async_queue_pop_unlocked(queue->events);
324 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "sending event upstream\n");
325 gst_pad_event_default (pad, event);
326 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "event sent\n");
328 g_async_queue_unlock(queue->events);
331 /* we have to lock the queue since we span threads */
332 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "locking t:%p", g_thread_self ());
333 g_mutex_lock (queue->qlock);
334 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "locked t:%p", g_thread_self ());
336 /* assume don't need to flush this buffer when the queue is filled */
337 queue->flush = FALSE;
339 if (GST_IS_EVENT (data)) {
340 switch (GST_EVENT_TYPE (data)) {
341 case GST_EVENT_FLUSH:
342 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "FLUSH event, flushing queue\n");
343 gst_queue_locked_flush (queue);
346 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "eos in on %s %d\n",
347 GST_ELEMENT_NAME (queue), queue->level_buffers);
350 /* we put the event in the queue, we don't have to act ourselves */
355 if (GST_IS_BUFFER (data))
356 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue,
357 "adding buffer %p of size %d", data, GST_BUFFER_SIZE (data));
359 if (queue->level_buffers == queue->size_buffers) {
360 g_mutex_unlock (queue->qlock);
361 g_signal_emit (G_OBJECT (queue), gst_queue_signals[FULL], 0);
362 g_mutex_lock (queue->qlock);
364 /* if this is a leaky queue... */
366 /* FIXME don't want to leak events! */
367 /* if we leak on the upstream side, drop the current buffer */
368 if (queue->leaky == GST_QUEUE_LEAK_UPSTREAM) {
369 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "queue is full, leaking buffer on upstream end");
370 if (GST_IS_EVENT (data))
371 fprintf(stderr, "Error: queue [%s] leaked an event, type:%d\n",
372 GST_ELEMENT_NAME(GST_ELEMENT(queue)),
373 GST_EVENT_TYPE(GST_EVENT(data)));
374 /* now we have to clean up and exit right away */
375 g_mutex_unlock (queue->qlock);
378 /* otherwise we have to push a buffer off the other end */
383 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "queue is full, leaking buffer on downstream end");
385 front = g_queue_pop_head (queue->queue);
386 leak = GST_DATA (front);
388 queue->level_buffers--;
389 if (GST_IS_EVENT (leak)) {
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(leak)));
394 queue->level_bytes -= GST_BUFFER_SIZE(leak);
397 gst_data_unref (leak);
401 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "pre full wait, level:%d/%d buffers, %d bytes",
402 queue->level_buffers, queue->size_buffers, queue->level_bytes);
404 while (queue->level_buffers == queue->size_buffers) {
405 /* if there's a pending state change for this queue or its manager, switch */
406 /* back to iterator so bottom half of state change executes */
407 if (queue->interrupt) {
408 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "interrupted!!");
409 g_mutex_unlock (queue->qlock);
410 if (gst_scheduler_interrupt (gst_pad_get_scheduler (queue->sinkpad), GST_ELEMENT (queue)))
412 /* if we got here because we were unlocked after a flush, we don't need
413 * to add the buffer to the queue again */
415 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "not adding pending buffer after flush");
418 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "adding pending buffer after interrupt");
421 if (GST_STATE (queue) != GST_STATE_PLAYING) {
422 /* this means the other end is shut down */
423 /* try to signal to resolve the error */
424 if (!queue->may_deadlock) {
425 g_mutex_unlock (queue->qlock);
426 gst_data_unref (data);
427 gst_element_error (GST_ELEMENT (queue), "deadlock found, source pad elements are shut down");
428 /* we don't want to goto out_unref here, since we want to clean up before calling gst_element_error */
432 g_print ("%s: waiting for the app to restart source pad elements\n", GST_ELEMENT_NAME (queue));
436 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "waiting for not_full, level:%d/%d buffers, %d bytes",
437 queue->level_buffers, queue->size_buffers, queue->level_bytes);
438 g_cond_wait (queue->not_full, queue->qlock);
439 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "got not_full signal");
441 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "post full wait, level:%d/%d buffers, %d bytes",
442 queue->level_buffers, queue->size_buffers, queue->level_bytes);
445 /* put the buffer on the tail of the list */
446 g_queue_push_tail (queue->queue, data);
448 queue->level_buffers++;
449 if (GST_IS_BUFFER (data))
450 queue->level_bytes += GST_BUFFER_SIZE (data);
452 /* this assertion _has_ to hold */
453 g_assert (queue->queue->length == queue->level_buffers);
455 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "(%s:%s)+ level:%d/%d buffers, %d bytes",
456 GST_DEBUG_PAD_NAME(pad),
457 queue->level_buffers, queue->size_buffers, queue->level_bytes);
459 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "signalling not_empty");
460 g_cond_signal (queue->not_empty);
461 g_mutex_unlock (queue->qlock);
466 gst_data_unref (data);
471 gst_queue_get (GstPad *pad)
474 GstData *data = NULL;
477 g_assert(pad != NULL);
478 g_assert(GST_IS_PAD(pad));
479 g_return_val_if_fail (pad != NULL, NULL);
480 g_return_val_if_fail (GST_IS_PAD (pad), NULL);
482 queue = GST_QUEUE (GST_OBJECT_PARENT (pad));
485 /* have to lock for thread-safety */
486 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "locking t:%p", g_thread_self ());
487 g_mutex_lock (queue->qlock);
488 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "locked t:%p %p", g_thread_self (), queue->not_empty);
490 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "pre empty wait, level:%d/%d buffers, %d bytes",
491 queue->level_buffers, queue->size_buffers, queue->level_bytes);
492 while (queue->level_buffers == 0) {
493 /* if there's a pending state change for this queue or its manager, switch
494 * back to iterator so bottom half of state change executes
496 //while (GST_STATE_PENDING (queue) != GST_STATE_VOID_PENDING) {
497 if (queue->interrupt) {
498 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "interrupted!!");
499 g_mutex_unlock (queue->qlock);
500 if (gst_scheduler_interrupt (gst_pad_get_scheduler (queue->srcpad), GST_ELEMENT (queue)))
501 return GST_DATA (gst_event_new (GST_EVENT_INTERRUPT));
504 if (GST_STATE (queue) != GST_STATE_PLAYING) {
505 /* this means the other end is shut down */
506 if (!queue->may_deadlock) {
507 g_mutex_unlock (queue->qlock);
508 gst_element_error (GST_ELEMENT (queue), "deadlock found, sink pad elements are shut down");
512 g_print ("%s: waiting for the app to restart source pad elements\n", GST_ELEMENT_NAME (queue));
516 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "waiting for not_empty, level:%d/%d buffers, %d bytes",
517 queue->level_buffers, queue->size_buffers, queue->level_bytes);
519 /* if (queue->block_timeout > -1){ */
522 g_get_current_time(&timeout);
523 g_time_val_add(&timeout, queue->block_timeout);
524 if (!g_cond_timed_wait (queue->not_empty, queue->qlock, &timeout)){
525 g_mutex_unlock (queue->qlock);
526 g_warning ("filler");
527 return GST_DATA (gst_event_new_filler());
531 g_cond_wait (queue->not_empty, queue->qlock);
533 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "got not_empty signal");
535 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "post empty wait, level:%d/%d buffers, %d bytes",
536 queue->level_buffers, queue->size_buffers, queue->level_bytes);
538 front = g_queue_pop_head (queue->queue);
539 data = GST_DATA (front);
540 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "retrieved data %p from queue", data);
542 queue->level_buffers--;
543 if (GST_IS_BUFFER (data))
544 queue->level_bytes -= GST_BUFFER_SIZE (data);
546 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "(%s:%s)- level:%d/%d buffers, %d bytes",
547 GST_DEBUG_PAD_NAME(pad),
548 queue->level_buffers, queue->size_buffers, queue->level_bytes);
550 /* this assertion _has_ to hold */
551 g_assert (queue->queue->length == queue->level_buffers);
553 GST_CAT_LOG_OBJECT (GST_CAT_DATAFLOW, queue, "signalling not_full");
554 g_cond_signal (queue->not_full);
556 g_mutex_unlock (queue->qlock);
558 /* FIXME where should this be? locked? */
559 if (GST_IS_EVENT (data)) {
560 GstEvent *event = GST_EVENT (data);
561 switch (GST_EVENT_TYPE(event)) {
563 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "queue \"%s\" eos", GST_ELEMENT_NAME (queue));
564 gst_element_set_eos (GST_ELEMENT (queue));
576 gst_queue_handle_src_event (GstPad *pad, GstEvent *event)
583 queue = GST_QUEUE (GST_OBJECT_PARENT (pad));
585 g_mutex_lock (queue->qlock);
587 if (gst_element_get_state (GST_ELEMENT (queue)) == GST_STATE_PLAYING) {
588 /* push the event to the queue for upstream consumption */
589 g_async_queue_push(queue->events, event);
590 g_warning ("FIXME: sending event in a running queue");
591 /* FIXME wait for delivery of the event here, then return the result
592 * instead of FALSE */
597 event_type = GST_EVENT_TYPE (event);
598 if (event_type == GST_EVENT_SEEK)
599 flag_flush = GST_EVENT_SEEK_FLAGS (event) & GST_SEEK_FLAG_FLUSH;
601 res = gst_pad_event_default (pad, event);
603 switch (event_type) {
604 case GST_EVENT_FLUSH:
605 GST_CAT_DEBUG_OBJECT (GST_CAT_DATAFLOW, queue, "FLUSH event, flushing queue\n");
606 gst_queue_locked_flush (queue);
610 gst_queue_locked_flush (queue);
617 g_mutex_unlock (queue->qlock);
619 /* we have to claim success, but we don't really know */
624 gst_queue_release_locks (GstElement *element)
628 queue = GST_QUEUE (element);
630 g_mutex_lock (queue->qlock);
631 queue->interrupt = TRUE;
632 g_cond_signal (queue->not_full);
633 g_cond_signal (queue->not_empty);
634 g_mutex_unlock (queue->qlock);
639 static GstElementStateReturn
640 gst_queue_change_state (GstElement *element)
643 GstElementStateReturn ret;
645 queue = GST_QUEUE (element);
647 GST_CAT_LOG_OBJECT (GST_CAT_STATES, element, "starting state change");
649 /* lock the queue so another thread (not in sync with this thread's state)
650 * can't call this queue's _get (or whatever)
652 g_mutex_lock (queue->qlock);
654 switch (GST_STATE_TRANSITION (element)) {
655 case GST_STATE_NULL_TO_READY:
656 gst_queue_locked_flush (queue);
658 case GST_STATE_READY_TO_PAUSED:
660 case GST_STATE_PAUSED_TO_PLAYING:
661 if (!GST_PAD_IS_LINKED (queue->sinkpad)) {
662 GST_CAT_DEBUG_OBJECT (GST_CAT_STATES, queue, "queue %s is not linked", GST_ELEMENT_NAME (queue));
663 /* FIXME can this be? */
664 g_cond_signal (queue->not_empty);
666 ret = GST_STATE_FAILURE;
670 GstScheduler *src_sched, *sink_sched;
672 src_sched = gst_pad_get_scheduler (GST_PAD_CAST (queue->srcpad));
673 sink_sched = gst_pad_get_scheduler (GST_PAD_CAST (queue->sinkpad));
675 if (src_sched == sink_sched) {
676 GST_CAT_DEBUG_OBJECT (GST_CAT_STATES, queue, "queue %s does not connect different schedulers",
677 GST_ELEMENT_NAME (queue));
679 g_warning ("queue %s does not connect different schedulers",
680 GST_ELEMENT_NAME (queue));
682 ret = GST_STATE_FAILURE;
686 queue->interrupt = FALSE;
688 case GST_STATE_PLAYING_TO_PAUSED:
690 case GST_STATE_PAUSED_TO_READY:
691 gst_queue_locked_flush (queue);
693 case GST_STATE_READY_TO_NULL:
697 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element);
700 g_mutex_unlock (queue->qlock);
702 GST_CAT_LOG_OBJECT (GST_CAT_STATES, element, "done with state change");
708 gst_queue_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
712 /* it's not null if we got it, but it might not be ours */
713 g_return_if_fail (GST_IS_QUEUE (object));
715 queue = GST_QUEUE (object);
719 queue->leaky = g_value_get_enum (value);
722 queue->size_buffers = g_value_get_int (value);
724 case ARG_MIN_THRESHOLD_BYTES:
725 queue->min_threshold_bytes = g_value_get_int (value);
727 case ARG_MAY_DEADLOCK:
728 queue->may_deadlock = g_value_get_boolean (value);
730 case ARG_BLOCK_TIMEOUT:
731 queue->block_timeout = g_value_get_int (value);
734 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
740 gst_queue_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
744 /* it's not null if we got it, but it might not be ours */
745 g_return_if_fail (GST_IS_QUEUE (object));
747 queue = GST_QUEUE (object);
751 g_value_set_enum (value, queue->leaky);
754 g_value_set_int (value, queue->level_buffers);
757 g_value_set_int (value, queue->size_buffers);
759 case ARG_MIN_THRESHOLD_BYTES:
760 g_value_set_int (value, queue->min_threshold_bytes);
762 case ARG_MAY_DEADLOCK:
763 g_value_set_boolean (value, queue->may_deadlock);
765 case ARG_BLOCK_TIMEOUT:
766 g_value_set_int (value, queue->block_timeout);
769 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);