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>
5 * 2005 Wim Taymans <wim@fluendo.com>
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Library General Public
11 * License as published by the Free Software Foundation; either
12 * version 2 of the License, or (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Library General Public License for more details.
19 * You should have received a copy of the GNU Library General Public
20 * License along with this library; if not, write to the
21 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
22 * Boston, MA 02110-1301, USA.
26 * SECTION:element-queue
28 * Data is queued until one of the limits specified by the
29 * #GstQueue:max-size-buffers, #GstQueue:max-size-bytes and/or
30 * #GstQueue:max-size-time properties has been reached. Any attempt to push
31 * more buffers into the queue will block the pushing thread until more space
34 * The queue will create a new thread on the source pad to decouple the
35 * processing on sink and source pad.
37 * You can query how many buffers are queued by reading the
38 * #GstQueue:current-level-buffers property. You can track changes
39 * by connecting to the notify::current-level-buffers signal (which
40 * like all signals will be emitted from the streaming thread). The same
41 * applies to the #GstQueue:current-level-time and
42 * #GstQueue:current-level-bytes properties.
44 * The default queue size limits are 200 buffers, 10MB of data, or
45 * one second worth of data, whichever is reached first.
47 * As said earlier, the queue blocks by default when one of the specified
48 * maximums (bytes, time, buffers) has been reached. You can set the
49 * #GstQueue:leaky property to specify that instead of blocking it should
50 * leak (drop) new or old buffers.
52 * The #GstQueue::underrun signal is emitted when the queue has less data than
53 * the specified minimum thresholds require (by default: when the queue is
54 * empty). The #GstQueue::overrun signal is emitted when the queue is filled
55 * up. Both signals are emitted from the context of the streaming thread.
58 #include "gst/gst_private.h"
63 #include "../../gst/gst-i18n-lib.h"
64 #include "../../gst/glib-compat-private.h"
66 static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
71 static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
76 GST_DEBUG_CATEGORY_STATIC (queue_debug);
77 #define GST_CAT_DEFAULT (queue_debug)
78 GST_DEBUG_CATEGORY_STATIC (queue_dataflow);
80 #define STATUS(queue, pad, msg) \
81 GST_CAT_LOG_OBJECT (queue_dataflow, queue, \
82 "(%s:%s) " msg ": %u of %u-%u buffers, %u of %u-%u " \
83 "bytes, %" G_GUINT64_FORMAT " of %" G_GUINT64_FORMAT \
84 "-%" G_GUINT64_FORMAT " ns, %u items", \
85 GST_DEBUG_PAD_NAME (pad), \
86 queue->cur_level.buffers, \
87 queue->min_threshold.buffers, \
88 queue->max_size.buffers, \
89 queue->cur_level.bytes, \
90 queue->min_threshold.bytes, \
91 queue->max_size.bytes, \
92 queue->cur_level.time, \
93 queue->min_threshold.time, \
94 queue->max_size.time, \
95 gst_queue_array_get_length (queue->queue))
97 /* Queue signals and args */
110 /* FIXME: don't we have another way of doing this
111 * "Gstreamer format" (frame/byte/time) queries? */
112 PROP_CUR_LEVEL_BUFFERS,
113 PROP_CUR_LEVEL_BYTES,
115 PROP_MAX_SIZE_BUFFERS,
118 PROP_MIN_THRESHOLD_BUFFERS,
119 PROP_MIN_THRESHOLD_BYTES,
120 PROP_MIN_THRESHOLD_TIME,
126 /* default property values */
127 #define DEFAULT_MAX_SIZE_BUFFERS 200 /* 200 buffers */
128 #define DEFAULT_MAX_SIZE_BYTES (10 * 1024 * 1024) /* 10 MB */
129 #define DEFAULT_MAX_SIZE_TIME GST_SECOND /* 1 second */
131 #define GST_QUEUE_MUTEX_LOCK(q) G_STMT_START { \
132 g_mutex_lock (&q->qlock); \
135 #define GST_QUEUE_MUTEX_LOCK_CHECK(q,label) G_STMT_START { \
136 GST_QUEUE_MUTEX_LOCK (q); \
137 if (q->srcresult != GST_FLOW_OK) \
141 #define GST_QUEUE_MUTEX_UNLOCK(q) G_STMT_START { \
142 g_mutex_unlock (&q->qlock); \
145 #define GST_QUEUE_WAIT_DEL_CHECK(q, label) G_STMT_START { \
146 STATUS (q, q->sinkpad, "wait for DEL"); \
147 q->waiting_del = TRUE; \
148 g_cond_wait (&q->item_del, &q->qlock); \
149 q->waiting_del = FALSE; \
150 if (q->srcresult != GST_FLOW_OK) { \
151 STATUS (q, q->srcpad, "received DEL wakeup"); \
154 STATUS (q, q->sinkpad, "received DEL"); \
157 #define GST_QUEUE_WAIT_ADD_CHECK(q, label) G_STMT_START { \
158 STATUS (q, q->srcpad, "wait for ADD"); \
159 q->waiting_add = TRUE; \
160 g_cond_wait (&q->item_add, &q->qlock); \
161 q->waiting_add = FALSE; \
162 if (q->srcresult != GST_FLOW_OK) { \
163 STATUS (q, q->srcpad, "received ADD wakeup"); \
166 STATUS (q, q->srcpad, "received ADD"); \
169 #define GST_QUEUE_SIGNAL_DEL(q) G_STMT_START { \
170 if (q->waiting_del) { \
171 STATUS (q, q->srcpad, "signal DEL"); \
172 g_cond_signal (&q->item_del); \
176 #define GST_QUEUE_SIGNAL_ADD(q) G_STMT_START { \
177 if (q->waiting_add) { \
178 STATUS (q, q->sinkpad, "signal ADD"); \
179 g_cond_signal (&q->item_add); \
184 GST_DEBUG_CATEGORY_INIT (queue_debug, "queue", 0, "queue element"); \
185 GST_DEBUG_CATEGORY_INIT (queue_dataflow, "queue_dataflow", 0, \
186 "dataflow inside the queue element");
187 #define gst_queue_parent_class parent_class
188 G_DEFINE_TYPE_WITH_CODE (GstQueue, gst_queue, GST_TYPE_ELEMENT, _do_init);
190 static void gst_queue_finalize (GObject * object);
191 static void gst_queue_set_property (GObject * object,
192 guint prop_id, const GValue * value, GParamSpec * pspec);
193 static void gst_queue_get_property (GObject * object,
194 guint prop_id, GValue * value, GParamSpec * pspec);
196 static GstFlowReturn gst_queue_chain (GstPad * pad, GstObject * parent,
198 static GstFlowReturn gst_queue_push_one (GstQueue * queue);
199 static void gst_queue_loop (GstPad * pad);
201 static gboolean gst_queue_handle_sink_event (GstPad * pad, GstObject * parent,
203 static gboolean gst_queue_handle_sink_query (GstPad * pad, GstObject * parent,
206 static gboolean gst_queue_handle_src_event (GstPad * pad, GstObject * parent,
208 static gboolean gst_queue_handle_src_query (GstPad * pad, GstObject * parent,
211 static void gst_queue_locked_flush (GstQueue * queue, gboolean full);
213 static gboolean gst_queue_src_activate_mode (GstPad * pad, GstObject * parent,
214 GstPadMode mode, gboolean active);
215 static gboolean gst_queue_sink_activate_mode (GstPad * pad, GstObject * parent,
216 GstPadMode mode, gboolean active);
218 static gboolean gst_queue_is_empty (GstQueue * queue);
219 static gboolean gst_queue_is_filled (GstQueue * queue);
228 #define GST_TYPE_QUEUE_LEAKY (queue_leaky_get_type ())
231 queue_leaky_get_type (void)
233 static GType queue_leaky_type = 0;
234 static const GEnumValue queue_leaky[] = {
235 {GST_QUEUE_NO_LEAK, "Not Leaky", "no"},
236 {GST_QUEUE_LEAK_UPSTREAM, "Leaky on upstream (new buffers)", "upstream"},
237 {GST_QUEUE_LEAK_DOWNSTREAM, "Leaky on downstream (old buffers)",
242 if (!queue_leaky_type) {
243 queue_leaky_type = g_enum_register_static ("GstQueueLeaky", queue_leaky);
245 return queue_leaky_type;
248 static guint gst_queue_signals[LAST_SIGNAL] = { 0 };
251 gst_queue_class_init (GstQueueClass * klass)
253 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
254 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
256 gobject_class->set_property = gst_queue_set_property;
257 gobject_class->get_property = gst_queue_get_property;
261 * GstQueue::underrun:
262 * @queue: the queue instance
264 * Reports that the buffer became empty (underrun).
265 * A buffer is empty if the total amount of data inside it (num-buffers, time,
266 * size) is lower than the boundary values which can be set through the
267 * GObject properties.
269 gst_queue_signals[SIGNAL_UNDERRUN] =
270 g_signal_new ("underrun", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
271 G_STRUCT_OFFSET (GstQueueClass, underrun), NULL, NULL,
272 g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
275 * @queue: the queue instance
277 * Reports that enough (min-threshold) data is in the queue. Use this signal
278 * together with the underrun signal to pause the pipeline on underrun and
279 * wait for the queue to fill-up before resume playback.
281 gst_queue_signals[SIGNAL_RUNNING] =
282 g_signal_new ("running", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
283 G_STRUCT_OFFSET (GstQueueClass, running), NULL, NULL,
284 g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
287 * @queue: the queue instance
289 * Reports that the buffer became full (overrun).
290 * A buffer is full if the total amount of data inside it (num-buffers, time,
291 * size) is higher than the boundary values which can be set through the
292 * GObject properties.
294 gst_queue_signals[SIGNAL_OVERRUN] =
295 g_signal_new ("overrun", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
296 G_STRUCT_OFFSET (GstQueueClass, overrun), NULL, NULL,
297 g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
300 * @queue: the queue instance
302 * Reports when the queue has enough data to start pushing data again on the
305 gst_queue_signals[SIGNAL_PUSHING] =
306 g_signal_new ("pushing", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
307 G_STRUCT_OFFSET (GstQueueClass, pushing), NULL, NULL,
308 g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
311 g_object_class_install_property (gobject_class, PROP_CUR_LEVEL_BYTES,
312 g_param_spec_uint ("current-level-bytes", "Current level (kB)",
313 "Current amount of data in the queue (bytes)",
314 0, G_MAXUINT, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
315 g_object_class_install_property (gobject_class, PROP_CUR_LEVEL_BUFFERS,
316 g_param_spec_uint ("current-level-buffers", "Current level (buffers)",
317 "Current number of buffers in the queue",
318 0, G_MAXUINT, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
319 g_object_class_install_property (gobject_class, PROP_CUR_LEVEL_TIME,
320 g_param_spec_uint64 ("current-level-time", "Current level (ns)",
321 "Current amount of data in the queue (in ns)",
322 0, G_MAXUINT64, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
324 g_object_class_install_property (gobject_class, PROP_MAX_SIZE_BYTES,
325 g_param_spec_uint ("max-size-bytes", "Max. size (kB)",
326 "Max. amount of data in the queue (bytes, 0=disable)",
327 0, G_MAXUINT, DEFAULT_MAX_SIZE_BYTES,
328 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
329 g_object_class_install_property (gobject_class, PROP_MAX_SIZE_BUFFERS,
330 g_param_spec_uint ("max-size-buffers", "Max. size (buffers)",
331 "Max. number of buffers in the queue (0=disable)", 0, G_MAXUINT,
332 DEFAULT_MAX_SIZE_BUFFERS,
333 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
334 g_object_class_install_property (gobject_class, PROP_MAX_SIZE_TIME,
335 g_param_spec_uint64 ("max-size-time", "Max. size (ns)",
336 "Max. amount of data in the queue (in ns, 0=disable)", 0, G_MAXUINT64,
337 DEFAULT_MAX_SIZE_TIME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
339 g_object_class_install_property (gobject_class, PROP_MIN_THRESHOLD_BYTES,
340 g_param_spec_uint ("min-threshold-bytes", "Min. threshold (kB)",
341 "Min. amount of data in the queue to allow reading (bytes, 0=disable)",
342 0, G_MAXUINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
343 g_object_class_install_property (gobject_class, PROP_MIN_THRESHOLD_BUFFERS,
344 g_param_spec_uint ("min-threshold-buffers", "Min. threshold (buffers)",
345 "Min. number of buffers in the queue to allow reading (0=disable)",
346 0, G_MAXUINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
347 g_object_class_install_property (gobject_class, PROP_MIN_THRESHOLD_TIME,
348 g_param_spec_uint64 ("min-threshold-time", "Min. threshold (ns)",
349 "Min. amount of data in the queue to allow reading (in ns, 0=disable)",
350 0, G_MAXUINT64, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
352 g_object_class_install_property (gobject_class, PROP_LEAKY,
353 g_param_spec_enum ("leaky", "Leaky",
354 "Where the queue leaks, if at all",
355 GST_TYPE_QUEUE_LEAKY, GST_QUEUE_NO_LEAK,
356 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
361 * Don't emit queue signals. Makes queues more lightweight if no signals are
364 g_object_class_install_property (gobject_class, PROP_SILENT,
365 g_param_spec_boolean ("silent", "Silent",
366 "Don't emit queue signals", FALSE,
367 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
370 * GstQueue:flush-on-eos
372 * Discard all data in the queue when an EOS event is received, and pass
373 * on the EOS event as soon as possible (instead of waiting until all
374 * buffers in the queue have been processed, which is the default behaviour).
376 * Flushing the queue on EOS might be useful when capturing and encoding
377 * from a live source, to finish up the recording quickly in cases when
378 * the encoder is slow. Note that this might mean some data from the end of
379 * the recoding data might be lost though (never more than the configured
380 * max. sizes though).
384 g_object_class_install_property (gobject_class, PROP_FLUSH_ON_EOS,
385 g_param_spec_boolean ("flush-on-eos", "Flush on EOS",
386 "Discard all data in the queue when an EOS event is received", FALSE,
387 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
389 gobject_class->finalize = gst_queue_finalize;
391 gst_element_class_set_static_metadata (gstelement_class,
393 "Generic", "Simple data queue", "Erik Walthinsen <omega@cse.ogi.edu>");
394 gst_element_class_add_pad_template (gstelement_class,
395 gst_static_pad_template_get (&srctemplate));
396 gst_element_class_add_pad_template (gstelement_class,
397 gst_static_pad_template_get (&sinktemplate));
399 /* Registering debug symbols for function pointers */
400 GST_DEBUG_REGISTER_FUNCPTR (gst_queue_src_activate_mode);
401 GST_DEBUG_REGISTER_FUNCPTR (gst_queue_handle_sink_event);
402 GST_DEBUG_REGISTER_FUNCPTR (gst_queue_handle_sink_query);
403 GST_DEBUG_REGISTER_FUNCPTR (gst_queue_handle_src_event);
404 GST_DEBUG_REGISTER_FUNCPTR (gst_queue_handle_src_query);
405 GST_DEBUG_REGISTER_FUNCPTR (gst_queue_chain);
409 gst_queue_init (GstQueue * queue)
411 queue->sinkpad = gst_pad_new_from_static_template (&sinktemplate, "sink");
413 gst_pad_set_chain_function (queue->sinkpad, gst_queue_chain);
414 gst_pad_set_activatemode_function (queue->sinkpad,
415 gst_queue_sink_activate_mode);
416 gst_pad_set_event_function (queue->sinkpad, gst_queue_handle_sink_event);
417 gst_pad_set_query_function (queue->sinkpad, gst_queue_handle_sink_query);
418 GST_PAD_SET_PROXY_CAPS (queue->sinkpad);
419 gst_element_add_pad (GST_ELEMENT (queue), queue->sinkpad);
421 queue->srcpad = gst_pad_new_from_static_template (&srctemplate, "src");
423 gst_pad_set_activatemode_function (queue->srcpad,
424 gst_queue_src_activate_mode);
425 gst_pad_set_event_function (queue->srcpad, gst_queue_handle_src_event);
426 gst_pad_set_query_function (queue->srcpad, gst_queue_handle_src_query);
427 GST_PAD_SET_PROXY_CAPS (queue->srcpad);
428 gst_element_add_pad (GST_ELEMENT (queue), queue->srcpad);
430 GST_QUEUE_CLEAR_LEVEL (queue->cur_level);
431 queue->max_size.buffers = DEFAULT_MAX_SIZE_BUFFERS;
432 queue->max_size.bytes = DEFAULT_MAX_SIZE_BYTES;
433 queue->max_size.time = DEFAULT_MAX_SIZE_TIME;
434 GST_QUEUE_CLEAR_LEVEL (queue->min_threshold);
435 GST_QUEUE_CLEAR_LEVEL (queue->orig_min_threshold);
436 gst_segment_init (&queue->sink_segment, GST_FORMAT_TIME);
437 gst_segment_init (&queue->src_segment, GST_FORMAT_TIME);
438 queue->head_needs_discont = queue->tail_needs_discont = FALSE;
440 queue->leaky = GST_QUEUE_NO_LEAK;
441 queue->srcresult = GST_FLOW_FLUSHING;
443 g_mutex_init (&queue->qlock);
444 g_cond_init (&queue->item_add);
445 g_cond_init (&queue->item_del);
446 g_cond_init (&queue->query_handled);
448 queue->queue = gst_queue_array_new (DEFAULT_MAX_SIZE_BUFFERS * 3 / 2);
450 queue->sinktime = GST_CLOCK_TIME_NONE;
451 queue->srctime = GST_CLOCK_TIME_NONE;
453 queue->sink_tainted = TRUE;
454 queue->src_tainted = TRUE;
456 queue->newseg_applied_to_src = FALSE;
458 GST_DEBUG_OBJECT (queue,
459 "initialized queue's not_empty & not_full conditions");
462 /* called only once, as opposed to dispose */
464 gst_queue_finalize (GObject * object)
466 GstQueue *queue = GST_QUEUE (object);
468 GST_DEBUG_OBJECT (queue, "finalizing queue");
470 while (!gst_queue_array_is_empty (queue->queue)) {
471 GstQueueItem *qitem = gst_queue_array_pop_head (queue->queue);
472 /* FIXME: if it's a query, shouldn't we unref that too? */
473 if (!qitem->is_query)
474 gst_mini_object_unref (qitem->item);
475 g_slice_free (GstQueueItem, qitem);
477 gst_queue_array_free (queue->queue);
479 g_mutex_clear (&queue->qlock);
480 g_cond_clear (&queue->item_add);
481 g_cond_clear (&queue->item_del);
482 g_cond_clear (&queue->query_handled);
484 G_OBJECT_CLASS (parent_class)->finalize (object);
487 /* calculate the diff between running time on the sink and src of the queue.
488 * This is the total amount of time in the queue. */
490 update_time_level (GstQueue * queue)
492 gint64 sink_time, src_time;
494 if (queue->sink_tainted) {
495 GST_LOG_OBJECT (queue, "update sink time");
497 gst_segment_to_running_time (&queue->sink_segment, GST_FORMAT_TIME,
498 queue->sink_segment.position);
499 queue->sink_tainted = FALSE;
501 sink_time = queue->sinktime;
503 if (queue->src_tainted) {
504 GST_LOG_OBJECT (queue, "update src time");
506 gst_segment_to_running_time (&queue->src_segment, GST_FORMAT_TIME,
507 queue->src_segment.position);
508 queue->src_tainted = FALSE;
510 src_time = queue->srctime;
512 GST_LOG_OBJECT (queue, "sink %" GST_TIME_FORMAT ", src %" GST_TIME_FORMAT,
513 GST_TIME_ARGS (sink_time), GST_TIME_ARGS (src_time));
515 if (sink_time >= src_time)
516 queue->cur_level.time = sink_time - src_time;
518 queue->cur_level.time = 0;
521 /* take a SEGMENT event and apply the values to segment, updating the time
524 apply_segment (GstQueue * queue, GstEvent * event, GstSegment * segment,
527 gst_event_copy_segment (event, segment);
529 /* now configure the values, we use these to track timestamps on the
531 if (segment->format != GST_FORMAT_TIME) {
532 /* non-time format, pretent the current time segment is closed with a
533 * 0 start and unknown stop time. */
534 segment->format = GST_FORMAT_TIME;
540 queue->sink_tainted = TRUE;
542 queue->src_tainted = TRUE;
544 GST_DEBUG_OBJECT (queue, "configured SEGMENT %" GST_SEGMENT_FORMAT, segment);
546 /* segment can update the time level of the queue */
547 update_time_level (queue);
550 /* take a buffer and update segment, updating the time level of the queue. */
552 apply_buffer (GstQueue * queue, GstBuffer * buffer, GstSegment * segment,
553 gboolean with_duration, gboolean sink)
555 GstClockTime duration, timestamp;
557 timestamp = GST_BUFFER_TIMESTAMP (buffer);
558 duration = GST_BUFFER_DURATION (buffer);
560 /* if no timestamp is set, assume it's continuous with the previous
562 if (timestamp == GST_CLOCK_TIME_NONE)
563 timestamp = segment->position;
566 if (with_duration && duration != GST_CLOCK_TIME_NONE)
567 timestamp += duration;
569 GST_LOG_OBJECT (queue, "position updated to %" GST_TIME_FORMAT,
570 GST_TIME_ARGS (timestamp));
572 segment->position = timestamp;
574 queue->sink_tainted = TRUE;
576 queue->src_tainted = TRUE;
579 /* calc diff with other end */
580 update_time_level (queue);
584 gst_queue_locked_flush (GstQueue * queue, gboolean full)
586 while (!gst_queue_array_is_empty (queue->queue)) {
587 GstQueueItem *qitem = gst_queue_array_pop_head (queue->queue);
589 /* Then lose another reference because we are supposed to destroy that
590 data when flushing */
591 if (!full && !qitem->is_query && GST_IS_EVENT (qitem->item)
592 && GST_EVENT_IS_STICKY (qitem->item)
593 && GST_EVENT_TYPE (qitem->item) != GST_EVENT_SEGMENT
594 && GST_EVENT_TYPE (qitem->item) != GST_EVENT_EOS) {
595 gst_pad_store_sticky_event (queue->srcpad, GST_EVENT_CAST (qitem->item));
597 if (!qitem->is_query)
598 gst_mini_object_unref (qitem->item);
599 g_slice_free (GstQueueItem, qitem);
601 queue->last_query = FALSE;
602 g_cond_signal (&queue->query_handled);
603 GST_QUEUE_CLEAR_LEVEL (queue->cur_level);
604 queue->min_threshold.buffers = queue->orig_min_threshold.buffers;
605 queue->min_threshold.bytes = queue->orig_min_threshold.bytes;
606 queue->min_threshold.time = queue->orig_min_threshold.time;
607 gst_segment_init (&queue->sink_segment, GST_FORMAT_TIME);
608 gst_segment_init (&queue->src_segment, GST_FORMAT_TIME);
609 queue->head_needs_discont = queue->tail_needs_discont = FALSE;
611 queue->sinktime = queue->srctime = GST_CLOCK_TIME_NONE;
612 queue->sink_tainted = queue->src_tainted = TRUE;
614 /* we deleted a lot of something */
615 GST_QUEUE_SIGNAL_DEL (queue);
618 /* enqueue an item an update the level stats, with QUEUE_LOCK */
620 gst_queue_locked_enqueue_buffer (GstQueue * queue, gpointer item)
622 GstBuffer *buffer = GST_BUFFER_CAST (item);
624 /* add buffer to the statistics */
625 queue->cur_level.buffers++;
626 queue->cur_level.bytes += gst_buffer_get_size (buffer);
627 apply_buffer (queue, buffer, &queue->sink_segment, TRUE, TRUE);
630 GstQueueItem *qitem = g_slice_new (GstQueueItem);
632 qitem->is_query = FALSE;
633 gst_queue_array_push_tail (queue->queue, qitem);
635 GST_QUEUE_SIGNAL_ADD (queue);
639 gst_queue_locked_enqueue_event (GstQueue * queue, gpointer item)
641 GstEvent *event = GST_EVENT_CAST (item);
643 switch (GST_EVENT_TYPE (event)) {
645 GST_CAT_LOG_OBJECT (queue_dataflow, queue, "got EOS from upstream");
646 /* Zero the thresholds, this makes sure the queue is completely
647 * filled and we can read all data from the queue. */
648 if (queue->flush_on_eos)
649 gst_queue_locked_flush (queue, FALSE);
651 GST_QUEUE_CLEAR_LEVEL (queue->min_threshold);
652 /* mark the queue as EOS. This prevents us from accepting more data. */
655 case GST_EVENT_SEGMENT:
656 apply_segment (queue, event, &queue->sink_segment, TRUE);
657 /* if the queue is empty, apply sink segment on the source */
658 if (gst_queue_array_is_empty (queue->queue)) {
659 GST_CAT_LOG_OBJECT (queue_dataflow, queue, "Apply segment on srcpad");
660 apply_segment (queue, event, &queue->src_segment, FALSE);
661 queue->newseg_applied_to_src = TRUE;
663 /* a new segment allows us to accept more buffers if we got EOS
665 queue->unexpected = FALSE;
672 GstQueueItem *qitem = g_slice_new (GstQueueItem);
674 qitem->is_query = FALSE;
675 gst_queue_array_push_tail (queue->queue, qitem);
677 GST_QUEUE_SIGNAL_ADD (queue);
680 /* dequeue an item from the queue and update level stats, with QUEUE_LOCK */
681 static GstMiniObject *
682 gst_queue_locked_dequeue (GstQueue * queue)
687 qitem = gst_queue_array_pop_head (queue->queue);
692 g_slice_free (GstQueueItem, qitem);
694 if (GST_IS_BUFFER (item)) {
695 GstBuffer *buffer = GST_BUFFER_CAST (item);
697 GST_CAT_LOG_OBJECT (queue_dataflow, queue,
698 "retrieved buffer %p from queue", buffer);
700 queue->cur_level.buffers--;
701 queue->cur_level.bytes -= gst_buffer_get_size (buffer);
702 apply_buffer (queue, buffer, &queue->src_segment, TRUE, FALSE);
704 /* if the queue is empty now, update the other side */
705 if (queue->cur_level.buffers == 0)
706 queue->cur_level.time = 0;
708 } else if (GST_IS_EVENT (item)) {
709 GstEvent *event = GST_EVENT_CAST (item);
711 GST_CAT_LOG_OBJECT (queue_dataflow, queue,
712 "retrieved event %p from queue", event);
714 switch (GST_EVENT_TYPE (event)) {
716 /* queue is empty now that we dequeued the EOS */
717 GST_QUEUE_CLEAR_LEVEL (queue->cur_level);
719 case GST_EVENT_SEGMENT:
720 /* apply newsegment if it has not already been applied */
721 if (G_LIKELY (!queue->newseg_applied_to_src)) {
722 apply_segment (queue, event, &queue->src_segment, FALSE);
724 queue->newseg_applied_to_src = FALSE;
730 } else if (GST_IS_QUERY (item)) {
731 GstQuery *query = GST_QUERY_CAST (item);
733 GST_CAT_LOG_OBJECT (queue_dataflow, queue,
734 "retrieved query %p from queue", query);
737 ("Unexpected item %p dequeued from queue %s (refcounting problem?)",
738 item, GST_OBJECT_NAME (queue));
741 GST_QUEUE_SIGNAL_DEL (queue);
748 GST_CAT_DEBUG_OBJECT (queue_dataflow, queue, "the queue is empty");
754 gst_queue_handle_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
758 queue = GST_QUEUE (parent);
760 switch (GST_EVENT_TYPE (event)) {
761 case GST_EVENT_FLUSH_START:
763 STATUS (queue, pad, "received flush start event");
765 gst_pad_push_event (queue->srcpad, event);
767 /* now unblock the chain function */
768 GST_QUEUE_MUTEX_LOCK (queue);
769 queue->srcresult = GST_FLOW_FLUSHING;
770 /* unblock the loop and chain functions */
771 GST_QUEUE_SIGNAL_ADD (queue);
772 GST_QUEUE_SIGNAL_DEL (queue);
773 queue->last_query = FALSE;
774 g_cond_signal (&queue->query_handled);
775 GST_QUEUE_MUTEX_UNLOCK (queue);
777 /* make sure it pauses, this should happen since we sent
778 * flush_start downstream. */
779 gst_pad_pause_task (queue->srcpad);
780 GST_CAT_LOG_OBJECT (queue_dataflow, queue, "loop stopped");
783 case GST_EVENT_FLUSH_STOP:
785 STATUS (queue, pad, "received flush stop event");
787 gst_pad_push_event (queue->srcpad, event);
789 GST_QUEUE_MUTEX_LOCK (queue);
790 gst_queue_locked_flush (queue, FALSE);
791 queue->srcresult = GST_FLOW_OK;
793 queue->unexpected = FALSE;
794 gst_pad_start_task (queue->srcpad, (GstTaskFunction) gst_queue_loop,
795 queue->srcpad, NULL);
796 GST_QUEUE_MUTEX_UNLOCK (queue);
798 STATUS (queue, pad, "after flush");
802 if (GST_EVENT_IS_SERIALIZED (event)) {
803 /* serialized events go in the queue */
804 GST_QUEUE_MUTEX_LOCK (queue);
805 if (queue->srcresult != GST_FLOW_OK) {
806 /* Errors in sticky event pushing are no problem and ignored here
807 * as they will cause more meaningful errors during data flow.
808 * For EOS events, that are not followed by data flow, we still
809 * return FALSE here though.
811 if (!GST_EVENT_IS_STICKY (event) ||
812 GST_EVENT_TYPE (event) == GST_EVENT_EOS)
815 /* refuse more events on EOS */
818 gst_queue_locked_enqueue_event (queue, event);
819 GST_QUEUE_MUTEX_UNLOCK (queue);
821 /* non-serialized events are forwarded downstream immediately */
822 gst_pad_push_event (queue->srcpad, event);
832 GST_CAT_LOG_OBJECT (queue_dataflow, queue, "refusing event, we are EOS");
833 GST_QUEUE_MUTEX_UNLOCK (queue);
834 gst_event_unref (event);
839 GST_CAT_LOG_OBJECT (queue_dataflow, queue,
840 "refusing event, we have a downstream flow error: %s",
841 gst_flow_get_name (queue->srcresult));
842 GST_QUEUE_MUTEX_UNLOCK (queue);
843 gst_event_unref (event);
849 gst_queue_handle_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
851 GstQueue *queue = GST_QUEUE_CAST (parent);
854 switch (GST_QUERY_TYPE (query)) {
856 if (G_UNLIKELY (GST_QUERY_IS_SERIALIZED (query))) {
859 GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
860 GST_LOG_OBJECT (queue, "queuing query %p (%s)", query,
861 GST_QUERY_TYPE_NAME (query));
862 qitem = g_slice_new (GstQueueItem);
863 qitem->item = GST_MINI_OBJECT_CAST (query);
864 qitem->is_query = TRUE;
865 gst_queue_array_push_tail (queue->queue, qitem);
866 GST_QUEUE_SIGNAL_ADD (queue);
867 g_cond_wait (&queue->query_handled, &queue->qlock);
868 if (queue->srcresult != GST_FLOW_OK)
870 res = queue->last_query;
871 GST_QUEUE_MUTEX_UNLOCK (queue);
873 res = gst_pad_query_default (pad, parent, query);
882 GST_DEBUG_OBJECT (queue, "we are flushing");
883 GST_QUEUE_MUTEX_UNLOCK (queue);
889 gst_queue_is_empty (GstQueue * queue)
893 if (gst_queue_array_is_empty (queue->queue))
896 /* Only consider the queue empty if the minimum thresholds
897 * are not reached and data is at the queue head. Otherwise
898 * we would block forever on serialized queries.
900 head = gst_queue_array_peek_head (queue->queue);
901 if (!GST_IS_BUFFER (head->item) && !GST_IS_BUFFER_LIST (head->item))
904 /* It is possible that a max size is reached before all min thresholds are.
905 * Therefore, only consider it empty if it is not filled. */
906 return ((queue->min_threshold.buffers > 0 &&
907 queue->cur_level.buffers < queue->min_threshold.buffers) ||
908 (queue->min_threshold.bytes > 0 &&
909 queue->cur_level.bytes < queue->min_threshold.bytes) ||
910 (queue->min_threshold.time > 0 &&
911 queue->cur_level.time < queue->min_threshold.time)) &&
912 !gst_queue_is_filled (queue);
916 gst_queue_is_filled (GstQueue * queue)
918 return (((queue->max_size.buffers > 0 &&
919 queue->cur_level.buffers >= queue->max_size.buffers) ||
920 (queue->max_size.bytes > 0 &&
921 queue->cur_level.bytes >= queue->max_size.bytes) ||
922 (queue->max_size.time > 0 &&
923 queue->cur_level.time >= queue->max_size.time)));
927 gst_queue_leak_downstream (GstQueue * queue)
929 /* for as long as the queue is filled, dequeue an item and discard it */
930 while (gst_queue_is_filled (queue)) {
933 leak = gst_queue_locked_dequeue (queue);
934 /* there is nothing to dequeue and the queue is still filled.. This should
936 g_assert (leak != NULL);
938 GST_CAT_DEBUG_OBJECT (queue_dataflow, queue,
939 "queue is full, leaking item %p on downstream end", leak);
940 if (GST_IS_EVENT (leak) && GST_EVENT_IS_STICKY (leak)) {
941 GST_CAT_DEBUG_OBJECT (queue_dataflow, queue,
942 "Storing sticky event %s on srcpad", GST_EVENT_TYPE_NAME (leak));
943 gst_pad_store_sticky_event (queue->srcpad, GST_EVENT_CAST (leak));
946 if (!GST_IS_QUERY (leak))
947 gst_mini_object_unref (leak);
949 /* last buffer needs to get a DISCONT flag */
950 queue->head_needs_discont = TRUE;
955 gst_queue_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
958 GstClockTime duration, timestamp;
960 queue = GST_QUEUE_CAST (parent);
962 /* we have to lock the queue since we span threads */
963 GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
964 /* when we received EOS, we refuse any more data */
967 if (queue->unexpected)
970 timestamp = GST_BUFFER_TIMESTAMP (buffer);
971 duration = GST_BUFFER_DURATION (buffer);
973 GST_CAT_LOG_OBJECT (queue_dataflow, queue, "received buffer %p of size %"
974 G_GSIZE_FORMAT ", time %" GST_TIME_FORMAT ", duration %"
975 GST_TIME_FORMAT, buffer, gst_buffer_get_size (buffer),
976 GST_TIME_ARGS (timestamp), GST_TIME_ARGS (duration));
978 /* We make space available if we're "full" according to whatever
979 * the user defined as "full". Note that this only applies to buffers.
980 * We always handle events and they don't count in our statistics. */
981 while (gst_queue_is_filled (queue)) {
982 if (!queue->silent) {
983 GST_QUEUE_MUTEX_UNLOCK (queue);
984 g_signal_emit (queue, gst_queue_signals[SIGNAL_OVERRUN], 0);
985 GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
986 /* we recheck, the signal could have changed the thresholds */
987 if (!gst_queue_is_filled (queue))
991 /* how are we going to make space for this buffer? */
992 switch (queue->leaky) {
993 case GST_QUEUE_LEAK_UPSTREAM:
994 /* next buffer needs to get a DISCONT flag */
995 queue->tail_needs_discont = TRUE;
996 /* leak current buffer */
997 GST_CAT_DEBUG_OBJECT (queue_dataflow, queue,
998 "queue is full, leaking buffer on upstream end");
999 /* now we can clean up and exit right away */
1001 case GST_QUEUE_LEAK_DOWNSTREAM:
1002 gst_queue_leak_downstream (queue);
1005 g_warning ("Unknown leaky type, using default");
1007 case GST_QUEUE_NO_LEAK:
1009 GST_CAT_DEBUG_OBJECT (queue_dataflow, queue,
1010 "queue is full, waiting for free space");
1012 /* don't leak. Instead, wait for space to be available */
1014 /* for as long as the queue is filled, wait till an item was deleted. */
1015 GST_QUEUE_WAIT_DEL_CHECK (queue, out_flushing);
1016 } while (gst_queue_is_filled (queue));
1018 GST_CAT_DEBUG_OBJECT (queue_dataflow, queue, "queue is not full");
1020 if (!queue->silent) {
1021 GST_QUEUE_MUTEX_UNLOCK (queue);
1022 g_signal_emit (queue, gst_queue_signals[SIGNAL_RUNNING], 0);
1023 GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
1030 if (queue->tail_needs_discont) {
1031 GstBuffer *subbuffer = gst_buffer_make_writable (buffer);
1035 GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
1037 GST_DEBUG_OBJECT (queue, "Could not mark buffer as DISCONT");
1039 queue->tail_needs_discont = FALSE;
1042 /* put buffer in queue now */
1043 gst_queue_locked_enqueue_buffer (queue, buffer);
1044 GST_QUEUE_MUTEX_UNLOCK (queue);
1048 /* special conditions */
1051 GST_QUEUE_MUTEX_UNLOCK (queue);
1053 gst_buffer_unref (buffer);
1059 GstFlowReturn ret = queue->srcresult;
1061 GST_CAT_LOG_OBJECT (queue_dataflow, queue,
1062 "exit because task paused, reason: %s", gst_flow_get_name (ret));
1063 GST_QUEUE_MUTEX_UNLOCK (queue);
1064 gst_buffer_unref (buffer);
1070 GST_CAT_LOG_OBJECT (queue_dataflow, queue, "exit because we received EOS");
1071 GST_QUEUE_MUTEX_UNLOCK (queue);
1073 gst_buffer_unref (buffer);
1075 return GST_FLOW_EOS;
1079 GST_CAT_LOG_OBJECT (queue_dataflow, queue, "exit because we received EOS");
1080 GST_QUEUE_MUTEX_UNLOCK (queue);
1082 gst_buffer_unref (buffer);
1084 return GST_FLOW_EOS;
1088 /* dequeue an item from the queue an push it downstream. This functions returns
1089 * the result of the push. */
1090 static GstFlowReturn
1091 gst_queue_push_one (GstQueue * queue)
1093 GstFlowReturn result = GST_FLOW_OK;
1094 GstMiniObject *data;
1096 data = gst_queue_locked_dequeue (queue);
1101 if (GST_IS_BUFFER (data)) {
1104 buffer = GST_BUFFER_CAST (data);
1106 if (queue->head_needs_discont) {
1107 GstBuffer *subbuffer = gst_buffer_make_writable (buffer);
1111 GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
1113 GST_DEBUG_OBJECT (queue, "Could not mark buffer as DISCONT");
1115 queue->head_needs_discont = FALSE;
1118 GST_QUEUE_MUTEX_UNLOCK (queue);
1119 result = gst_pad_push (queue->srcpad, buffer);
1121 /* need to check for srcresult here as well */
1122 GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
1124 if (result == GST_FLOW_EOS) {
1125 GST_CAT_LOG_OBJECT (queue_dataflow, queue, "got EOS from downstream");
1126 /* stop pushing buffers, we dequeue all items until we see an item that we
1127 * can push again, which is EOS or SEGMENT. If there is nothing in the
1128 * queue we can push, we set a flag to make the sinkpad refuse more
1129 * buffers with an EOS return value. */
1130 while ((data = gst_queue_locked_dequeue (queue))) {
1131 if (GST_IS_BUFFER (data)) {
1132 GST_CAT_LOG_OBJECT (queue_dataflow, queue,
1133 "dropping EOS buffer %p", data);
1134 gst_buffer_unref (GST_BUFFER_CAST (data));
1135 } else if (GST_IS_EVENT (data)) {
1136 GstEvent *event = GST_EVENT_CAST (data);
1137 GstEventType type = GST_EVENT_TYPE (event);
1139 if (type == GST_EVENT_EOS || type == GST_EVENT_SEGMENT) {
1140 /* we found a pushable item in the queue, push it out */
1141 GST_CAT_LOG_OBJECT (queue_dataflow, queue,
1142 "pushing pushable event %s after EOS",
1143 GST_EVENT_TYPE_NAME (event));
1146 GST_CAT_LOG_OBJECT (queue_dataflow, queue,
1147 "dropping EOS event %p", event);
1148 gst_event_unref (event);
1149 } else if (GST_IS_QUERY (data)) {
1150 GstQuery *query = GST_QUERY_CAST (data);
1152 GST_CAT_LOG_OBJECT (queue_dataflow, queue,
1153 "dropping query %p because of EOS", query);
1154 queue->last_query = FALSE;
1155 g_cond_signal (&queue->query_handled);
1158 /* no more items in the queue. Set the unexpected flag so that upstream
1159 * make us refuse any more buffers on the sinkpad. Since we will still
1160 * accept EOS and SEGMENT we return _FLOW_OK to the caller so that the
1161 * task function does not shut down. */
1162 queue->unexpected = TRUE;
1163 result = GST_FLOW_OK;
1165 } else if (GST_IS_EVENT (data)) {
1166 GstEvent *event = GST_EVENT_CAST (data);
1167 GstEventType type = GST_EVENT_TYPE (event);
1169 GST_QUEUE_MUTEX_UNLOCK (queue);
1171 gst_pad_push_event (queue->srcpad, event);
1173 GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
1174 /* if we're EOS, return EOS so that the task pauses. */
1175 if (type == GST_EVENT_EOS) {
1176 GST_CAT_LOG_OBJECT (queue_dataflow, queue,
1177 "pushed EOS event %p, return EOS", event);
1178 result = GST_FLOW_EOS;
1180 } else if (GST_IS_QUERY (data)) {
1181 GstQuery *query = GST_QUERY_CAST (data);
1184 GST_QUEUE_MUTEX_UNLOCK (queue);
1185 ret = gst_pad_peer_query (queue->srcpad, query);
1186 GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing_query);
1187 queue->last_query = ret;
1188 g_cond_signal (&queue->query_handled);
1189 GST_CAT_LOG_OBJECT (queue_dataflow, queue,
1190 "did query %p, return %d", query, queue->last_query);
1197 GST_CAT_LOG_OBJECT (queue_dataflow, queue,
1198 "exit because we have no item in the queue");
1199 return GST_FLOW_ERROR;
1203 GST_CAT_LOG_OBJECT (queue_dataflow, queue, "exit because we are flushing");
1204 return GST_FLOW_FLUSHING;
1208 queue->last_query = FALSE;
1209 g_cond_signal (&queue->query_handled);
1210 GST_CAT_LOG_OBJECT (queue_dataflow, queue, "exit because we are flushing");
1211 return GST_FLOW_FLUSHING;
1216 gst_queue_loop (GstPad * pad)
1221 queue = (GstQueue *) GST_PAD_PARENT (pad);
1223 /* have to lock for thread-safety */
1224 GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
1226 while (gst_queue_is_empty (queue)) {
1227 GST_CAT_DEBUG_OBJECT (queue_dataflow, queue, "queue is empty");
1228 if (!queue->silent) {
1229 GST_QUEUE_MUTEX_UNLOCK (queue);
1230 g_signal_emit (queue, gst_queue_signals[SIGNAL_UNDERRUN], 0);
1231 GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
1234 /* we recheck, the signal could have changed the thresholds */
1235 while (gst_queue_is_empty (queue)) {
1236 GST_QUEUE_WAIT_ADD_CHECK (queue, out_flushing);
1239 GST_CAT_DEBUG_OBJECT (queue_dataflow, queue, "queue is not empty");
1240 if (!queue->silent) {
1241 GST_QUEUE_MUTEX_UNLOCK (queue);
1242 g_signal_emit (queue, gst_queue_signals[SIGNAL_RUNNING], 0);
1243 g_signal_emit (queue, gst_queue_signals[SIGNAL_PUSHING], 0);
1244 GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
1248 ret = gst_queue_push_one (queue);
1249 queue->srcresult = ret;
1250 if (ret != GST_FLOW_OK)
1253 GST_QUEUE_MUTEX_UNLOCK (queue);
1260 gboolean eos = queue->eos;
1261 GstFlowReturn ret = queue->srcresult;
1263 gst_pad_pause_task (queue->srcpad);
1264 GST_CAT_LOG_OBJECT (queue_dataflow, queue,
1265 "pause task, reason: %s", gst_flow_get_name (ret));
1266 if (ret == GST_FLOW_FLUSHING)
1267 gst_queue_locked_flush (queue, FALSE);
1269 GST_QUEUE_SIGNAL_DEL (queue);
1270 GST_QUEUE_MUTEX_UNLOCK (queue);
1271 /* let app know about us giving up if upstream is not expected to do so */
1272 /* EOS is already taken care of elsewhere */
1273 if (eos && (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS)) {
1274 GST_ELEMENT_ERROR (queue, STREAM, FAILED,
1275 (_("Internal data flow error.")),
1276 ("streaming task paused, reason %s (%d)",
1277 gst_flow_get_name (ret), ret));
1278 gst_pad_push_event (queue->srcpad, gst_event_new_eos ());
1285 gst_queue_handle_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
1287 gboolean res = TRUE;
1288 GstQueue *queue = GST_QUEUE (parent);
1290 #ifndef GST_DISABLE_GST_DEBUG
1291 GST_CAT_DEBUG_OBJECT (queue_dataflow, queue, "got event %p (%d)",
1292 event, GST_EVENT_TYPE (event));
1295 switch (GST_EVENT_TYPE (event)) {
1296 case GST_EVENT_RECONFIGURE:
1297 GST_QUEUE_MUTEX_LOCK (queue);
1298 if (queue->srcresult == GST_FLOW_NOT_LINKED) {
1299 /* when we got not linked, assume downstream is linked again now and we
1300 * can try to start pushing again */
1301 queue->srcresult = GST_FLOW_OK;
1302 gst_pad_start_task (pad, (GstTaskFunction) gst_queue_loop, pad, NULL);
1304 GST_QUEUE_MUTEX_UNLOCK (queue);
1306 res = gst_pad_push_event (queue->sinkpad, event);
1309 res = gst_pad_event_default (pad, parent, event);
1318 gst_queue_handle_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
1320 GstQueue *queue = GST_QUEUE (parent);
1323 switch (GST_QUERY_TYPE (query)) {
1324 case GST_QUERY_SCHEDULING:{
1325 gst_query_add_scheduling_mode (query, GST_PAD_MODE_PUSH);
1330 res = gst_pad_query_default (pad, parent, query);
1337 /* Adjust peer response for data contained in queue */
1338 switch (GST_QUERY_TYPE (query)) {
1339 case GST_QUERY_POSITION:
1344 /* get peer position */
1345 gst_query_parse_position (query, &format, &peer_pos);
1347 /* FIXME: this code assumes that there's no discont in the queue */
1349 case GST_FORMAT_BYTES:
1350 peer_pos -= queue->cur_level.bytes;
1352 case GST_FORMAT_TIME:
1353 peer_pos -= queue->cur_level.time;
1356 GST_DEBUG_OBJECT (queue, "Can't adjust query in %s format, don't "
1357 "know how to adjust value", gst_format_get_name (format));
1360 /* set updated position */
1361 gst_query_set_position (query, format, peer_pos);
1364 case GST_QUERY_LATENCY:
1367 GstClockTime min, max;
1369 gst_query_parse_latency (query, &live, &min, &max);
1371 /* we can delay up to the limit of the queue in time. If we have no time
1372 * limit, the best thing we can do is to return an infinite delay. In
1373 * reality a better estimate would be the byte/buffer rate but that is not
1374 * possible right now. */
1375 if (queue->max_size.time > 0 && max != -1)
1376 max += queue->max_size.time;
1380 /* adjust for min-threshold */
1381 if (queue->min_threshold.time > 0 && min != -1)
1382 min += queue->min_threshold.time;
1384 gst_query_set_latency (query, live, min, max);
1388 /* peer handled other queries */
1396 gst_queue_sink_activate_mode (GstPad * pad, GstObject * parent, GstPadMode mode,
1402 queue = GST_QUEUE (parent);
1405 case GST_PAD_MODE_PUSH:
1407 GST_QUEUE_MUTEX_LOCK (queue);
1408 queue->srcresult = GST_FLOW_OK;
1410 queue->unexpected = FALSE;
1411 GST_QUEUE_MUTEX_UNLOCK (queue);
1413 /* step 1, unblock chain function */
1414 GST_QUEUE_MUTEX_LOCK (queue);
1415 queue->srcresult = GST_FLOW_FLUSHING;
1416 /* the item del signal will unblock */
1417 g_cond_signal (&queue->item_del);
1418 /* unblock query handler */
1419 queue->last_query = FALSE;
1420 g_cond_signal (&queue->query_handled);
1421 GST_QUEUE_MUTEX_UNLOCK (queue);
1423 /* step 2, wait until streaming thread stopped and flush queue */
1424 GST_PAD_STREAM_LOCK (pad);
1425 GST_QUEUE_MUTEX_LOCK (queue);
1426 gst_queue_locked_flush (queue, TRUE);
1427 GST_QUEUE_MUTEX_UNLOCK (queue);
1428 GST_PAD_STREAM_UNLOCK (pad);
1440 gst_queue_src_activate_mode (GstPad * pad, GstObject * parent, GstPadMode mode,
1446 queue = GST_QUEUE (parent);
1449 case GST_PAD_MODE_PUSH:
1451 GST_QUEUE_MUTEX_LOCK (queue);
1452 queue->srcresult = GST_FLOW_OK;
1454 queue->unexpected = FALSE;
1456 gst_pad_start_task (pad, (GstTaskFunction) gst_queue_loop, pad,
1458 GST_QUEUE_MUTEX_UNLOCK (queue);
1460 /* step 1, unblock loop function */
1461 GST_QUEUE_MUTEX_LOCK (queue);
1462 queue->srcresult = GST_FLOW_FLUSHING;
1463 /* the item add signal will unblock */
1464 g_cond_signal (&queue->item_add);
1465 GST_QUEUE_MUTEX_UNLOCK (queue);
1467 /* step 2, make sure streaming finishes */
1468 result = gst_pad_stop_task (pad);
1479 queue_capacity_change (GstQueue * queue)
1481 if (queue->leaky == GST_QUEUE_LEAK_DOWNSTREAM) {
1482 gst_queue_leak_downstream (queue);
1485 /* changing the capacity of the queue must wake up
1486 * the _chain function, it might have more room now
1487 * to store the buffer/event in the queue */
1488 GST_QUEUE_SIGNAL_DEL (queue);
1491 /* Changing the minimum required fill level must
1492 * wake up the _loop function as it might now
1493 * be able to preceed.
1495 #define QUEUE_THRESHOLD_CHANGE(q)\
1496 GST_QUEUE_SIGNAL_ADD (q);
1499 gst_queue_set_property (GObject * object,
1500 guint prop_id, const GValue * value, GParamSpec * pspec)
1502 GstQueue *queue = GST_QUEUE (object);
1504 /* someone could change levels here, and since this
1505 * affects the get/put funcs, we need to lock for safety. */
1506 GST_QUEUE_MUTEX_LOCK (queue);
1509 case PROP_MAX_SIZE_BYTES:
1510 queue->max_size.bytes = g_value_get_uint (value);
1511 queue_capacity_change (queue);
1513 case PROP_MAX_SIZE_BUFFERS:
1514 queue->max_size.buffers = g_value_get_uint (value);
1515 queue_capacity_change (queue);
1517 case PROP_MAX_SIZE_TIME:
1518 queue->max_size.time = g_value_get_uint64 (value);
1519 queue_capacity_change (queue);
1521 case PROP_MIN_THRESHOLD_BYTES:
1522 queue->min_threshold.bytes = g_value_get_uint (value);
1523 queue->orig_min_threshold.bytes = queue->min_threshold.bytes;
1524 QUEUE_THRESHOLD_CHANGE (queue);
1526 case PROP_MIN_THRESHOLD_BUFFERS:
1527 queue->min_threshold.buffers = g_value_get_uint (value);
1528 queue->orig_min_threshold.buffers = queue->min_threshold.buffers;
1529 QUEUE_THRESHOLD_CHANGE (queue);
1531 case PROP_MIN_THRESHOLD_TIME:
1532 queue->min_threshold.time = g_value_get_uint64 (value);
1533 queue->orig_min_threshold.time = queue->min_threshold.time;
1534 QUEUE_THRESHOLD_CHANGE (queue);
1537 queue->leaky = g_value_get_enum (value);
1540 queue->silent = g_value_get_boolean (value);
1542 case PROP_FLUSH_ON_EOS:
1543 queue->flush_on_eos = g_value_get_boolean (value);
1546 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1550 GST_QUEUE_MUTEX_UNLOCK (queue);
1554 gst_queue_get_property (GObject * object,
1555 guint prop_id, GValue * value, GParamSpec * pspec)
1557 GstQueue *queue = GST_QUEUE (object);
1559 GST_QUEUE_MUTEX_LOCK (queue);
1562 case PROP_CUR_LEVEL_BYTES:
1563 g_value_set_uint (value, queue->cur_level.bytes);
1565 case PROP_CUR_LEVEL_BUFFERS:
1566 g_value_set_uint (value, queue->cur_level.buffers);
1568 case PROP_CUR_LEVEL_TIME:
1569 g_value_set_uint64 (value, queue->cur_level.time);
1571 case PROP_MAX_SIZE_BYTES:
1572 g_value_set_uint (value, queue->max_size.bytes);
1574 case PROP_MAX_SIZE_BUFFERS:
1575 g_value_set_uint (value, queue->max_size.buffers);
1577 case PROP_MAX_SIZE_TIME:
1578 g_value_set_uint64 (value, queue->max_size.time);
1580 case PROP_MIN_THRESHOLD_BYTES:
1581 g_value_set_uint (value, queue->min_threshold.bytes);
1583 case PROP_MIN_THRESHOLD_BUFFERS:
1584 g_value_set_uint (value, queue->min_threshold.buffers);
1586 case PROP_MIN_THRESHOLD_TIME:
1587 g_value_set_uint64 (value, queue->min_threshold.time);
1590 g_value_set_enum (value, queue->leaky);
1593 g_value_set_boolean (value, queue->silent);
1595 case PROP_FLUSH_ON_EOS:
1596 g_value_set_boolean (value, queue->flush_on_eos);
1599 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1603 GST_QUEUE_MUTEX_UNLOCK (queue);