1 /* GStreamer
2 * Copyright (C) 2006 Edward Hervey <edward@fluendo.com>
3 * Copyright (C) 2007 Jan Schmidt <jan@fluendo.com>
4 * Copyright (C) 2007 Wim Taymans <wim@fluendo.com>
5 * Copyright (C) 2011 Sebastian Dröge <sebastian.droege@collabora.co.uk>
6 *
7 * gstmultiqueue.c:
8 *
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.
13 *
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.
18 *
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., 59 Temple Place - Suite 330,
22 * Boston, MA 02111-1307, USA.
23 */
25 /**
26 * SECTION:element-multiqueue
27 * @see_also: #GstQueue
28 *
29 * <refsect2>
30 * <para>
31 * Multiqueue is similar to a normal #GstQueue with the following additional
32 * features:
33 * <orderedlist>
34 * <listitem>
35 * <itemizedlist><title>Multiple streamhandling</title>
36 * <listitem><para>
37 * The element handles queueing data on more than one stream at once. To
38 * achieve such a feature it has request sink pads (sink%d) and
39 * 'sometimes' src pads (src%d).
40 * </para><para>
41 * When requesting a given sinkpad with gst_element_get_request_pad(),
42 * the associated srcpad for that stream will be created.
43 * Example: requesting sink1 will generate src1.
44 * </para></listitem>
45 * </itemizedlist>
46 * </listitem>
47 * <listitem>
48 * <itemizedlist><title>Non-starvation on multiple streams</title>
49 * <listitem><para>
50 * If more than one stream is used with the element, the streams' queues
51 * will be dynamically grown (up to a limit), in order to ensure that no
52 * stream is risking data starvation. This guarantees that at any given
53 * time there are at least N bytes queued and available for each individual
54 * stream.
55 * </para><para>
56 * If an EOS event comes through a srcpad, the associated queue will be
57 * considered as 'not-empty' in the queue-size-growing algorithm.
58 * </para></listitem>
59 * </itemizedlist>
60 * </listitem>
61 * <listitem>
62 * <itemizedlist><title>Non-linked srcpads graceful handling</title>
63 * <listitem><para>
64 * In order to better support dynamic switching between streams, the multiqueue
65 * (unlike the current GStreamer queue) continues to push buffers on non-linked
66 * pads rather than shutting down.
67 * </para><para>
68 * In addition, to prevent a non-linked stream from very quickly consuming all
69 * available buffers and thus 'racing ahead' of the other streams, the element
70 * must ensure that buffers and inlined events for a non-linked stream are pushed
71 * in the same order as they were received, relative to the other streams
72 * controlled by the element. This means that a buffer cannot be pushed to a
73 * non-linked pad any sooner than buffers in any other stream which were received
74 * before it.
75 * </para></listitem>
76 * </itemizedlist>
77 * </listitem>
78 * </orderedlist>
79 * </para>
80 * <para>
81 * Data is queued until one of the limits specified by the
82 * #GstMultiQueue:max-size-buffers, #GstMultiQueue:max-size-bytes and/or
83 * #GstMultiQueue:max-size-time properties has been reached. Any attempt to push
84 * more buffers into the queue will block the pushing thread until more space
85 * becomes available. #GstMultiQueue:extra-size-buffers,
86 * </para>
87 * <para>
88 * #GstMultiQueue:extra-size-bytes and #GstMultiQueue:extra-size-time are
89 * currently unused.
90 * </para>
91 * <para>
92 * The default queue size limits are 5 buffers, 10MB of data, or
93 * two second worth of data, whichever is reached first. Note that the number
94 * of buffers will dynamically grow depending on the fill level of
95 * other queues.
96 * </para>
97 * <para>
98 * The #GstMultiQueue::underrun signal is emitted when all of the queues
99 * are empty. The #GstMultiQueue::overrun signal is emitted when one of the
100 * queues is filled.
101 * Both signals are emitted from the context of the streaming thread.
102 * </para>
103 * </refsect2>
104 *
105 * Last reviewed on 2008-01-25 (0.10.17)
106 */
108 #ifdef HAVE_CONFIG_H
109 # include "config.h"
110 #endif
112 #include <gst/gst.h>
113 #include <stdio.h>
114 #include "gstmultiqueue.h"
115 #include <gst/glib-compat-private.h>
117 /**
118 * GstSingleQueue:
119 * @sinkpad: associated sink #GstPad
120 * @srcpad: associated source #GstPad
121 *
122 * Structure containing all information and properties about
123 * a single queue.
124 */
125 typedef struct _GstSingleQueue GstSingleQueue;
127 struct _GstSingleQueue
128 {
129 /* unique identifier of the queue */
130 guint id;
132 GstMultiQueue *mqueue;
134 GstPad *sinkpad;
135 GstPad *srcpad;
137 /* flowreturn of previous srcpad push */
138 GstFlowReturn srcresult;
140 /* segments */
141 GstSegment sink_segment;
142 GstSegment src_segment;
144 /* position of src/sink */
145 GstClockTime sinktime, srctime;
146 /* TRUE if either position needs to be recalculated */
147 gboolean sink_tainted, src_tainted;
149 /* queue of data */
150 GstDataQueue *queue;
151 GstDataQueueSize max_size, extra_size;
152 GstClockTime cur_time;
153 gboolean is_eos;
154 gboolean flushing;
156 /* Protected by global lock */
157 guint32 nextid; /* ID of the next object waiting to be pushed */
158 guint32 oldid; /* ID of the last object pushed (last in a series) */
159 guint32 last_oldid; /* Previously observed old_id, reset to MAXUINT32 on flush */
160 GstClockTime next_time; /* End running time of next buffer to be pushed */
161 GstClockTime last_time; /* Start running time of last pushed buffer */
162 GCond *turn; /* SingleQueue turn waiting conditional */
163 };
166 /* Extension of GstDataQueueItem structure for our usage */
167 typedef struct _GstMultiQueueItem GstMultiQueueItem;
169 struct _GstMultiQueueItem
170 {
171 GstMiniObject *object;
172 guint size;
173 guint64 duration;
174 gboolean visible;
176 GDestroyNotify destroy;
177 guint32 posid;
178 };
180 static GstSingleQueue *gst_single_queue_new (GstMultiQueue * mqueue, gint id);
181 static void gst_single_queue_free (GstSingleQueue * squeue);
183 static void wake_up_next_non_linked (GstMultiQueue * mq);
184 static void compute_high_id (GstMultiQueue * mq);
185 static void compute_high_time (GstMultiQueue * mq);
186 static void single_queue_overrun_cb (GstDataQueue * dq, GstSingleQueue * sq);
187 static void single_queue_underrun_cb (GstDataQueue * dq, GstSingleQueue * sq);
189 static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink%d",
190 GST_PAD_SINK,
191 GST_PAD_REQUEST,
192 GST_STATIC_CAPS_ANY);
194 static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src%d",
195 GST_PAD_SRC,
196 GST_PAD_SOMETIMES,
197 GST_STATIC_CAPS_ANY);
199 GST_DEBUG_CATEGORY_STATIC (multi_queue_debug);
200 #define GST_CAT_DEFAULT (multi_queue_debug)
202 /* Signals and args */
203 enum
204 {
205 SIGNAL_UNDERRUN,
206 SIGNAL_OVERRUN,
207 LAST_SIGNAL
208 };
210 /* default limits, we try to keep up to 2 seconds of data and if there is not
211 * time, up to 10 MB. The number of buffers is dynamically scaled to make sure
212 * there is data in the queues. Normally, the byte and time limits are not hit
213 * in theses conditions. */
214 #define DEFAULT_MAX_SIZE_BYTES 10 * 1024 * 1024 /* 10 MB */
215 #define DEFAULT_MAX_SIZE_BUFFERS 5
216 #define DEFAULT_MAX_SIZE_TIME 2 * GST_SECOND
218 /* second limits. When we hit one of the above limits we are probably dealing
219 * with a badly muxed file and we scale the limits to these emergency values.
220 * This is currently not yet implemented.
221 * Since we dynamically scale the queue buffer size up to the limits but avoid
222 * going above the max-size-buffers when we can, we don't really need this
223 * aditional extra size. */
224 #define DEFAULT_EXTRA_SIZE_BYTES 10 * 1024 * 1024 /* 10 MB */
225 #define DEFAULT_EXTRA_SIZE_BUFFERS 5
226 #define DEFAULT_EXTRA_SIZE_TIME 3 * GST_SECOND
228 #define DEFAULT_USE_BUFFERING FALSE
229 #define DEFAULT_LOW_PERCENT 10
230 #define DEFAULT_HIGH_PERCENT 99
231 #define DEFAULT_SYNC_BY_RUNNING_TIME FALSE
233 enum
234 {
235 PROP_0,
236 PROP_EXTRA_SIZE_BYTES,
237 PROP_EXTRA_SIZE_BUFFERS,
238 PROP_EXTRA_SIZE_TIME,
239 PROP_MAX_SIZE_BYTES,
240 PROP_MAX_SIZE_BUFFERS,
241 PROP_MAX_SIZE_TIME,
242 PROP_USE_BUFFERING,
243 PROP_LOW_PERCENT,
244 PROP_HIGH_PERCENT,
245 PROP_SYNC_BY_RUNNING_TIME,
246 PROP_LAST
247 };
249 #define GST_MULTI_QUEUE_MUTEX_LOCK(q) G_STMT_START { \
250 g_mutex_lock (q->qlock); \
251 } G_STMT_END
253 #define GST_MULTI_QUEUE_MUTEX_UNLOCK(q) G_STMT_START { \
254 g_mutex_unlock (q->qlock); \
255 } G_STMT_END
257 static void gst_multi_queue_finalize (GObject * object);
258 static void gst_multi_queue_set_property (GObject * object,
259 guint prop_id, const GValue * value, GParamSpec * pspec);
260 static void gst_multi_queue_get_property (GObject * object,
261 guint prop_id, GValue * value, GParamSpec * pspec);
263 static GstPad *gst_multi_queue_request_new_pad (GstElement * element,
264 GstPadTemplate * temp, const gchar * name);
265 static void gst_multi_queue_release_pad (GstElement * element, GstPad * pad);
266 static GstStateChangeReturn gst_multi_queue_change_state (GstElement *
267 element, GstStateChange transition);
269 static void gst_multi_queue_loop (GstPad * pad);
271 #define _do_init(bla) \
272 GST_DEBUG_CATEGORY_INIT (multi_queue_debug, "multiqueue", 0, "multiqueue element");
274 GST_BOILERPLATE_FULL (GstMultiQueue, gst_multi_queue, GstElement,
275 GST_TYPE_ELEMENT, _do_init);
277 static guint gst_multi_queue_signals[LAST_SIGNAL] = { 0 };
279 static void
280 gst_multi_queue_base_init (gpointer g_class)
281 {
282 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
284 gst_element_class_set_details_simple (gstelement_class,
285 "MultiQueue",
286 "Generic", "Multiple data queue", "Edward Hervey <edward@fluendo.com>");
287 gst_element_class_add_pad_template (gstelement_class,
288 gst_static_pad_template_get (&sinktemplate));
289 gst_element_class_add_pad_template (gstelement_class,
290 gst_static_pad_template_get (&srctemplate));
291 }
293 static void
294 gst_multi_queue_class_init (GstMultiQueueClass * klass)
295 {
296 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
297 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
299 gobject_class->set_property = gst_multi_queue_set_property;
300 gobject_class->get_property = gst_multi_queue_get_property;
302 /* SIGNALS */
304 /**
305 * GstMultiQueue::underrun:
306 * @multiqueue: the multqueue instance
307 *
308 * This signal is emitted from the streaming thread when there is
309 * no data in any of the queues inside the multiqueue instance (underrun).
310 *
311 * This indicates either starvation or EOS from the upstream data sources.
312 */
313 gst_multi_queue_signals[SIGNAL_UNDERRUN] =
314 g_signal_new ("underrun", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
315 G_STRUCT_OFFSET (GstMultiQueueClass, underrun), NULL, NULL,
316 g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
318 /**
319 * GstMultiQueue::overrun:
320 * @multiqueue: the multiqueue instance
321 *
322 * Reports that one of the queues in the multiqueue is full (overrun).
323 * A queue is full if the total amount of data inside it (num-buffers, time,
324 * size) is higher than the boundary values which can be set through the
325 * GObject properties.
326 *
327 * This can be used as an indicator of pre-roll.
328 */
329 gst_multi_queue_signals[SIGNAL_OVERRUN] =
330 g_signal_new ("overrun", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
331 G_STRUCT_OFFSET (GstMultiQueueClass, overrun), NULL, NULL,
332 g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
334 /* PROPERTIES */
336 g_object_class_install_property (gobject_class, PROP_MAX_SIZE_BYTES,
337 g_param_spec_uint ("max-size-bytes", "Max. size (kB)",
338 "Max. amount of data in the queue (bytes, 0=disable)",
339 0, G_MAXUINT, DEFAULT_MAX_SIZE_BYTES,
340 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
341 g_object_class_install_property (gobject_class, PROP_MAX_SIZE_BUFFERS,
342 g_param_spec_uint ("max-size-buffers", "Max. size (buffers)",
343 "Max. number of buffers in the queue (0=disable)", 0, G_MAXUINT,
344 DEFAULT_MAX_SIZE_BUFFERS,
345 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
346 g_object_class_install_property (gobject_class, PROP_MAX_SIZE_TIME,
347 g_param_spec_uint64 ("max-size-time", "Max. size (ns)",
348 "Max. amount of data in the queue (in ns, 0=disable)", 0, G_MAXUINT64,
349 DEFAULT_MAX_SIZE_TIME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
351 g_object_class_install_property (gobject_class, PROP_EXTRA_SIZE_BYTES,
352 g_param_spec_uint ("extra-size-bytes", "Extra Size (kB)",
353 "Amount of data the queues can grow if one of them is empty (bytes, 0=disable)"
354 " (NOT IMPLEMENTED)",
355 0, G_MAXUINT, DEFAULT_EXTRA_SIZE_BYTES,
356 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
357 g_object_class_install_property (gobject_class, PROP_EXTRA_SIZE_BUFFERS,
358 g_param_spec_uint ("extra-size-buffers", "Extra Size (buffers)",
359 "Amount of buffers the queues can grow if one of them is empty (0=disable)"
360 " (NOT IMPLEMENTED)",
361 0, G_MAXUINT, DEFAULT_EXTRA_SIZE_BUFFERS,
362 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
363 g_object_class_install_property (gobject_class, PROP_EXTRA_SIZE_TIME,
364 g_param_spec_uint64 ("extra-size-time", "Extra Size (ns)",
365 "Amount of time the queues can grow if one of them is empty (in ns, 0=disable)"
366 " (NOT IMPLEMENTED)",
367 0, G_MAXUINT64, DEFAULT_EXTRA_SIZE_TIME,
368 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
370 /**
371 * GstMultiQueue:use-buffering
372 *
373 * Enable the buffering option in multiqueue so that BUFFERING messages are
374 * emited based on low-/high-percent thresholds.
375 *
376 * Since: 0.10.26
377 */
378 g_object_class_install_property (gobject_class, PROP_USE_BUFFERING,
379 g_param_spec_boolean ("use-buffering", "Use buffering",
380 "Emit GST_MESSAGE_BUFFERING based on low-/high-percent thresholds",
381 DEFAULT_USE_BUFFERING, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
382 /**
383 * GstMultiQueue:low-percent
384 *
385 * Low threshold percent for buffering to start.
386 *
387 * Since: 0.10.26
388 */
389 g_object_class_install_property (gobject_class, PROP_LOW_PERCENT,
390 g_param_spec_int ("low-percent", "Low percent",
391 "Low threshold for buffering to start", 0, 100,
392 DEFAULT_LOW_PERCENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
393 /**
394 * GstMultiQueue:high-percent
395 *
396 * High threshold percent for buffering to finish.
397 *
398 * Since: 0.10.26
399 */
400 g_object_class_install_property (gobject_class, PROP_HIGH_PERCENT,
401 g_param_spec_int ("high-percent", "High percent",
402 "High threshold for buffering to finish", 0, 100,
403 DEFAULT_HIGH_PERCENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
405 /**
406 * GstMultiQueue:sync-by-running-time
407 *
408 * If enabled multiqueue will synchronize deactivated or not-linked streams
409 * to the activated and linked streams by taking the running time.
410 * Otherwise multiqueue will synchronize the deactivated or not-linked
411 * streams by keeping the order in which buffers and events arrived compared
412 * to active and linked streams.
413 *
414 * Since: 0.10.36
415 */
416 g_object_class_install_property (gobject_class, PROP_SYNC_BY_RUNNING_TIME,
417 g_param_spec_boolean ("sync-by-running-time", "Sync By Running Time",
418 "Synchronize deactivated or not-linked streams by running time",
419 DEFAULT_SYNC_BY_RUNNING_TIME,
420 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
422 gobject_class->finalize = gst_multi_queue_finalize;
424 gstelement_class->request_new_pad =
425 GST_DEBUG_FUNCPTR (gst_multi_queue_request_new_pad);
426 gstelement_class->release_pad =
427 GST_DEBUG_FUNCPTR (gst_multi_queue_release_pad);
428 gstelement_class->change_state =
429 GST_DEBUG_FUNCPTR (gst_multi_queue_change_state);
430 }
432 static void
433 gst_multi_queue_init (GstMultiQueue * mqueue, GstMultiQueueClass * klass)
434 {
435 mqueue->nbqueues = 0;
436 mqueue->queues = NULL;
438 mqueue->max_size.bytes = DEFAULT_MAX_SIZE_BYTES;
439 mqueue->max_size.visible = DEFAULT_MAX_SIZE_BUFFERS;
440 mqueue->max_size.time = DEFAULT_MAX_SIZE_TIME;
442 mqueue->extra_size.bytes = DEFAULT_EXTRA_SIZE_BYTES;
443 mqueue->extra_size.visible = DEFAULT_EXTRA_SIZE_BUFFERS;
444 mqueue->extra_size.time = DEFAULT_EXTRA_SIZE_TIME;
446 mqueue->use_buffering = DEFAULT_USE_BUFFERING;
447 mqueue->low_percent = DEFAULT_LOW_PERCENT;
448 mqueue->high_percent = DEFAULT_HIGH_PERCENT;
450 mqueue->sync_by_running_time = DEFAULT_SYNC_BY_RUNNING_TIME;
452 mqueue->counter = 1;
453 mqueue->highid = -1;
454 mqueue->high_time = GST_CLOCK_TIME_NONE;
456 mqueue->qlock = g_mutex_new ();
457 }
459 static void
460 gst_multi_queue_finalize (GObject * object)
461 {
462 GstMultiQueue *mqueue = GST_MULTI_QUEUE (object);
464 g_list_foreach (mqueue->queues, (GFunc) gst_single_queue_free, NULL);
465 g_list_free (mqueue->queues);
466 mqueue->queues = NULL;
467 mqueue->queues_cookie++;
469 /* free/unref instance data */
470 g_mutex_free (mqueue->qlock);
472 G_OBJECT_CLASS (parent_class)->finalize (object);
473 }
475 #define SET_CHILD_PROPERTY(mq,format) G_STMT_START { \
476 GList * tmp = mq->queues; \
477 while (tmp) { \
478 GstSingleQueue *q = (GstSingleQueue*)tmp->data; \
479 q->max_size.format = mq->max_size.format; \
480 tmp = g_list_next(tmp); \
481 }; \
482 } G_STMT_END
484 static void
485 gst_multi_queue_set_property (GObject * object, guint prop_id,
486 const GValue * value, GParamSpec * pspec)
487 {
488 GstMultiQueue *mq = GST_MULTI_QUEUE (object);
490 switch (prop_id) {
491 case PROP_MAX_SIZE_BYTES:
492 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
493 mq->max_size.bytes = g_value_get_uint (value);
494 SET_CHILD_PROPERTY (mq, bytes);
495 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
496 break;
497 case PROP_MAX_SIZE_BUFFERS:
498 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
499 mq->max_size.visible = g_value_get_uint (value);
500 SET_CHILD_PROPERTY (mq, visible);
501 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
502 break;
503 case PROP_MAX_SIZE_TIME:
504 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
505 mq->max_size.time = g_value_get_uint64 (value);
506 SET_CHILD_PROPERTY (mq, time);
507 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
508 break;
509 case PROP_EXTRA_SIZE_BYTES:
510 mq->extra_size.bytes = g_value_get_uint (value);
511 break;
512 case PROP_EXTRA_SIZE_BUFFERS:
513 mq->extra_size.visible = g_value_get_uint (value);
514 break;
515 case PROP_EXTRA_SIZE_TIME:
516 mq->extra_size.time = g_value_get_uint64 (value);
517 break;
518 case PROP_USE_BUFFERING:
519 mq->use_buffering = g_value_get_boolean (value);
520 break;
521 case PROP_LOW_PERCENT:
522 mq->low_percent = g_value_get_int (value);
523 break;
524 case PROP_HIGH_PERCENT:
525 mq->high_percent = g_value_get_int (value);
526 break;
527 case PROP_SYNC_BY_RUNNING_TIME:
528 mq->sync_by_running_time = g_value_get_boolean (value);
529 break;
530 default:
531 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
532 break;
533 }
534 }
536 static void
537 gst_multi_queue_get_property (GObject * object, guint prop_id,
538 GValue * value, GParamSpec * pspec)
539 {
540 GstMultiQueue *mq = GST_MULTI_QUEUE (object);
542 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
544 switch (prop_id) {
545 case PROP_EXTRA_SIZE_BYTES:
546 g_value_set_uint (value, mq->extra_size.bytes);
547 break;
548 case PROP_EXTRA_SIZE_BUFFERS:
549 g_value_set_uint (value, mq->extra_size.visible);
550 break;
551 case PROP_EXTRA_SIZE_TIME:
552 g_value_set_uint64 (value, mq->extra_size.time);
553 break;
554 case PROP_MAX_SIZE_BYTES:
555 g_value_set_uint (value, mq->max_size.bytes);
556 break;
557 case PROP_MAX_SIZE_BUFFERS:
558 g_value_set_uint (value, mq->max_size.visible);
559 break;
560 case PROP_MAX_SIZE_TIME:
561 g_value_set_uint64 (value, mq->max_size.time);
562 break;
563 case PROP_USE_BUFFERING:
564 g_value_set_boolean (value, mq->use_buffering);
565 break;
566 case PROP_LOW_PERCENT:
567 g_value_set_int (value, mq->low_percent);
568 break;
569 case PROP_HIGH_PERCENT:
570 g_value_set_int (value, mq->high_percent);
571 break;
572 case PROP_SYNC_BY_RUNNING_TIME:
573 g_value_set_boolean (value, mq->sync_by_running_time);
574 break;
575 default:
576 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
577 break;
578 }
580 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
581 }
583 static GstIterator *
584 gst_multi_queue_iterate_internal_links (GstPad * pad)
585 {
586 GstIterator *it = NULL;
587 GstPad *opad;
588 GstSingleQueue *squeue;
589 GstMultiQueue *mq = GST_MULTI_QUEUE (gst_pad_get_parent (pad));
591 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
592 squeue = gst_pad_get_element_private (pad);
593 if (!squeue)
594 goto out;
596 if (squeue->sinkpad == pad)
597 opad = gst_object_ref (squeue->srcpad);
598 else if (squeue->srcpad == pad)
599 opad = gst_object_ref (squeue->sinkpad);
600 else
601 goto out;
603 it = gst_iterator_new_single (GST_TYPE_PAD, opad,
604 (GstCopyFunction) gst_object_ref, (GFreeFunc) gst_object_unref);
606 gst_object_unref (opad);
608 out:
609 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
610 gst_object_unref (mq);
612 return it;
613 }
616 /*
617 * GstElement methods
618 */
620 static GstPad *
621 gst_multi_queue_request_new_pad (GstElement * element, GstPadTemplate * temp,
622 const gchar * name)
623 {
624 GstMultiQueue *mqueue = GST_MULTI_QUEUE (element);
625 GstSingleQueue *squeue;
626 gint temp_id = -1;
628 if (name) {
629 sscanf (name + 4, "%d", &temp_id);
630 GST_LOG_OBJECT (element, "name : %s (id %d)", GST_STR_NULL (name), temp_id);
631 }
633 /* Create a new single queue, add the sink and source pad and return the sink pad */
634 squeue = gst_single_queue_new (mqueue, temp_id);
636 GST_DEBUG_OBJECT (mqueue, "Returning pad %s:%s",
637 GST_DEBUG_PAD_NAME (squeue->sinkpad));
639 return squeue ? squeue->sinkpad : NULL;
640 }
642 static void
643 gst_multi_queue_release_pad (GstElement * element, GstPad * pad)
644 {
645 GstMultiQueue *mqueue = GST_MULTI_QUEUE (element);
646 GstSingleQueue *sq = NULL;
647 GList *tmp;
649 GST_LOG_OBJECT (element, "pad %s:%s", GST_DEBUG_PAD_NAME (pad));
651 GST_MULTI_QUEUE_MUTEX_LOCK (mqueue);
652 /* Find which single queue it belongs to, knowing that it should be a sinkpad */
653 for (tmp = mqueue->queues; tmp; tmp = g_list_next (tmp)) {
654 sq = (GstSingleQueue *) tmp->data;
656 if (sq->sinkpad == pad)
657 break;
658 }
660 if (!tmp) {
661 GST_WARNING_OBJECT (mqueue, "That pad doesn't belong to this element ???");
662 GST_MULTI_QUEUE_MUTEX_UNLOCK (mqueue);
663 return;
664 }
666 /* FIXME: The removal of the singlequeue should probably not happen until it
667 * finishes draining */
669 /* remove it from the list */
670 mqueue->queues = g_list_delete_link (mqueue->queues, tmp);
671 mqueue->queues_cookie++;
673 /* FIXME : recompute next-non-linked */
674 GST_MULTI_QUEUE_MUTEX_UNLOCK (mqueue);
676 /* delete SingleQueue */
677 gst_data_queue_set_flushing (sq->queue, TRUE);
679 gst_pad_set_active (sq->srcpad, FALSE);
680 gst_pad_set_active (sq->sinkpad, FALSE);
681 gst_pad_set_element_private (sq->srcpad, NULL);
682 gst_pad_set_element_private (sq->sinkpad, NULL);
683 gst_element_remove_pad (element, sq->srcpad);
684 gst_element_remove_pad (element, sq->sinkpad);
685 gst_single_queue_free (sq);
686 }
688 static GstStateChangeReturn
689 gst_multi_queue_change_state (GstElement * element, GstStateChange transition)
690 {
691 GstMultiQueue *mqueue = GST_MULTI_QUEUE (element);
692 GstSingleQueue *sq = NULL;
693 GstStateChangeReturn result;
695 switch (transition) {
696 case GST_STATE_CHANGE_READY_TO_PAUSED:{
697 GList *tmp;
699 /* Set all pads to non-flushing */
700 GST_MULTI_QUEUE_MUTEX_LOCK (mqueue);
701 for (tmp = mqueue->queues; tmp; tmp = g_list_next (tmp)) {
702 sq = (GstSingleQueue *) tmp->data;
703 sq->flushing = FALSE;
704 }
705 GST_MULTI_QUEUE_MUTEX_UNLOCK (mqueue);
706 break;
707 }
708 case GST_STATE_CHANGE_PAUSED_TO_READY:{
709 GList *tmp;
711 /* Un-wait all waiting pads */
712 GST_MULTI_QUEUE_MUTEX_LOCK (mqueue);
713 for (tmp = mqueue->queues; tmp; tmp = g_list_next (tmp)) {
714 sq = (GstSingleQueue *) tmp->data;
715 sq->flushing = TRUE;
716 g_cond_signal (sq->turn);
717 }
718 GST_MULTI_QUEUE_MUTEX_UNLOCK (mqueue);
719 break;
720 }
721 default:
722 break;
723 }
725 result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
727 switch (transition) {
728 default:
729 break;
730 }
732 return result;
736 }
738 static gboolean
739 gst_single_queue_flush (GstMultiQueue * mq, GstSingleQueue * sq, gboolean flush)
740 {
741 gboolean result;
743 GST_DEBUG_OBJECT (mq, "flush %s queue %d", (flush ? "start" : "stop"),
744 sq->id);
746 if (flush) {
747 sq->srcresult = GST_FLOW_WRONG_STATE;
748 gst_data_queue_set_flushing (sq->queue, TRUE);
750 sq->flushing = TRUE;
752 /* wake up non-linked task */
753 GST_LOG_OBJECT (mq, "SingleQueue %d : waking up eventually waiting task",
754 sq->id);
755 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
756 g_cond_signal (sq->turn);
757 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
759 GST_LOG_OBJECT (mq, "SingleQueue %d : pausing task", sq->id);
760 result = gst_pad_pause_task (sq->srcpad);
761 sq->sink_tainted = sq->src_tainted = TRUE;
762 } else {
763 gst_data_queue_flush (sq->queue);
764 gst_segment_init (&sq->sink_segment, GST_FORMAT_TIME);
765 gst_segment_init (&sq->src_segment, GST_FORMAT_TIME);
766 /* All pads start off not-linked for a smooth kick-off */
767 sq->srcresult = GST_FLOW_OK;
768 sq->cur_time = 0;
769 sq->max_size.visible = mq->max_size.visible;
770 sq->is_eos = FALSE;
771 sq->nextid = 0;
772 sq->oldid = 0;
773 sq->last_oldid = G_MAXUINT32;
774 sq->next_time = GST_CLOCK_TIME_NONE;
775 sq->last_time = GST_CLOCK_TIME_NONE;
776 gst_data_queue_set_flushing (sq->queue, FALSE);
778 /* Reset high time to be recomputed next */
779 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
780 mq->high_time = GST_CLOCK_TIME_NONE;
781 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
783 sq->flushing = FALSE;
785 GST_LOG_OBJECT (mq, "SingleQueue %d : starting task", sq->id);
786 result =
787 gst_pad_start_task (sq->srcpad, (GstTaskFunction) gst_multi_queue_loop,
788 sq->srcpad);
789 }
790 return result;
791 }
793 static void
794 update_buffering (GstMultiQueue * mq, GstSingleQueue * sq)
795 {
796 GstDataQueueSize size;
797 gint percent, tmp;
798 gboolean post = FALSE;
800 /* nothing to dowhen we are not in buffering mode */
801 if (!mq->use_buffering)
802 return;
804 gst_data_queue_get_level (sq->queue, &size);
806 GST_DEBUG_OBJECT (mq,
807 "queue %d: visible %u/%u, bytes %u/%u, time %" G_GUINT64_FORMAT "/%"
808 G_GUINT64_FORMAT, sq->id, size.visible, sq->max_size.visible,
809 size.bytes, sq->max_size.bytes, sq->cur_time, sq->max_size.time);
811 /* get bytes and time percentages and take the max */
812 if (sq->is_eos) {
813 percent = 100;
814 } else {
815 percent = 0;
816 if (sq->max_size.time > 0) {
817 tmp = (sq->cur_time * 100) / sq->max_size.time;
818 percent = MAX (percent, tmp);
819 }
820 if (sq->max_size.bytes > 0) {
821 tmp = (size.bytes * 100) / sq->max_size.bytes;
822 percent = MAX (percent, tmp);
823 }
824 }
826 if (mq->buffering) {
827 post = TRUE;
828 if (percent >= mq->high_percent) {
829 mq->buffering = FALSE;
830 }
831 /* make sure it increases */
832 percent = MAX (mq->percent, percent);
834 if (percent == mq->percent)
835 /* don't post if nothing changed */
836 post = FALSE;
837 else
838 /* else keep last value we posted */
839 mq->percent = percent;
840 } else {
841 if (percent < mq->low_percent) {
842 mq->buffering = TRUE;
843 mq->percent = percent;
844 post = TRUE;
845 }
846 }
847 if (post) {
848 GstMessage *message;
850 /* scale to high percent so that it becomes the 100% mark */
851 percent = percent * 100 / mq->high_percent;
852 /* clip */
853 if (percent > 100)
854 percent = 100;
856 GST_DEBUG_OBJECT (mq, "buffering %d percent", percent);
857 message = gst_message_new_buffering (GST_OBJECT_CAST (mq), percent);
859 gst_element_post_message (GST_ELEMENT_CAST (mq), message);
860 } else {
861 GST_DEBUG_OBJECT (mq, "filled %d percent", percent);
862 }
863 }
865 /* calculate the diff between running time on the sink and src of the queue.
866 * This is the total amount of time in the queue.
867 * WITH LOCK TAKEN */
868 static void
869 update_time_level (GstMultiQueue * mq, GstSingleQueue * sq)
870 {
871 gint64 sink_time, src_time;
873 if (sq->sink_tainted) {
874 sink_time = sq->sinktime =
875 gst_segment_to_running_time (&sq->sink_segment, GST_FORMAT_TIME,
876 sq->sink_segment.last_stop);
878 if (G_UNLIKELY (sink_time != GST_CLOCK_TIME_NONE))
879 /* if we have a time, we become untainted and use the time */
880 sq->sink_tainted = FALSE;
881 } else
882 sink_time = sq->sinktime;
884 if (sq->src_tainted) {
885 src_time = sq->srctime =
886 gst_segment_to_running_time (&sq->src_segment, GST_FORMAT_TIME,
887 sq->src_segment.last_stop);
888 /* if we have a time, we become untainted and use the time */
889 if (G_UNLIKELY (src_time != GST_CLOCK_TIME_NONE))
890 sq->src_tainted = FALSE;
891 } else
892 src_time = sq->srctime;
894 GST_DEBUG_OBJECT (mq,
895 "queue %d, sink %" GST_TIME_FORMAT ", src %" GST_TIME_FORMAT, sq->id,
896 GST_TIME_ARGS (sink_time), GST_TIME_ARGS (src_time));
898 /* This allows for streams with out of order timestamping - sometimes the
899 * emerging timestamp is later than the arriving one(s) */
900 if (G_LIKELY (sink_time != -1 && src_time != -1 && sink_time > src_time))
901 sq->cur_time = sink_time - src_time;
902 else
903 sq->cur_time = 0;
905 /* updating the time level can change the buffering state */
906 update_buffering (mq, sq);
908 return;
909 }
911 /* take a NEWSEGMENT event and apply the values to segment, updating the time
912 * level of queue. */
913 static void
914 apply_segment (GstMultiQueue * mq, GstSingleQueue * sq, GstEvent * event,
915 GstSegment * segment)
916 {
917 gboolean update;
918 GstFormat format;
919 gdouble rate, arate;
920 gint64 start, stop, time;
922 gst_event_parse_new_segment_full (event, &update, &rate, &arate,
923 &format, &start, &stop, &time);
925 /* now configure the values, we use these to track timestamps on the
926 * sinkpad. */
927 if (format != GST_FORMAT_TIME) {
928 /* non-time format, pretent the current time segment is closed with a
929 * 0 start and unknown stop time. */
930 update = FALSE;
931 format = GST_FORMAT_TIME;
932 start = 0;
933 stop = -1;
934 time = 0;
935 }
937 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
939 gst_segment_set_newsegment_full (segment, update,
940 rate, arate, format, start, stop, time);
942 if (segment == &sq->sink_segment)
943 sq->sink_tainted = TRUE;
944 else
945 sq->src_tainted = TRUE;
947 GST_DEBUG_OBJECT (mq,
948 "queue %d, configured NEWSEGMENT %" GST_SEGMENT_FORMAT, sq->id, segment);
950 /* segment can update the time level of the queue */
951 update_time_level (mq, sq);
953 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
954 }
956 /* take a buffer and update segment, updating the time level of the queue. */
957 static void
958 apply_buffer (GstMultiQueue * mq, GstSingleQueue * sq, GstClockTime timestamp,
959 GstClockTime duration, GstSegment * segment)
960 {
961 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
963 /* if no timestamp is set, assume it's continuous with the previous
964 * time */
965 if (timestamp == GST_CLOCK_TIME_NONE)
966 timestamp = segment->last_stop;
968 /* add duration */
969 if (duration != GST_CLOCK_TIME_NONE)
970 timestamp += duration;
972 GST_DEBUG_OBJECT (mq, "queue %d, last_stop updated to %" GST_TIME_FORMAT,
973 sq->id, GST_TIME_ARGS (timestamp));
975 gst_segment_set_last_stop (segment, GST_FORMAT_TIME, timestamp);
977 if (segment == &sq->sink_segment)
978 sq->sink_tainted = TRUE;
979 else
980 sq->src_tainted = TRUE;
982 /* calc diff with other end */
983 update_time_level (mq, sq);
984 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
985 }
987 static GstClockTime
988 get_running_time (GstSegment * segment, GstMiniObject * object, gboolean end)
989 {
990 GstClockTime time = GST_CLOCK_TIME_NONE;
992 if (GST_IS_BUFFER (object)) {
993 GstBuffer *buf = GST_BUFFER_CAST (object);
995 if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
996 time = GST_BUFFER_TIMESTAMP (buf);
997 if (end && GST_BUFFER_DURATION_IS_VALID (buf))
998 time += GST_BUFFER_DURATION (buf);
999 if (time > segment->stop)
1000 time = segment->stop;
1001 time = gst_segment_to_running_time (segment, GST_FORMAT_TIME, time);
1002 }
1003 } else if (GST_IS_BUFFER_LIST (object)) {
1004 GstBufferList *list = GST_BUFFER_LIST_CAST (object);
1005 GstBufferListIterator *it = gst_buffer_list_iterate (list);
1006 GstBuffer *buf;
1008 do {
1009 while ((buf = gst_buffer_list_iterator_next (it))) {
1010 if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
1011 time = GST_BUFFER_TIMESTAMP (buf);
1012 if (end && GST_BUFFER_DURATION_IS_VALID (buf))
1013 time += GST_BUFFER_DURATION (buf);
1014 if (time > segment->stop)
1015 time = segment->stop;
1016 time = gst_segment_to_running_time (segment, GST_FORMAT_TIME, time);
1017 if (!end)
1018 goto done;
1019 } else if (!end) {
1020 goto done;
1021 }
1022 }
1023 } while (gst_buffer_list_iterator_next_group (it));
1024 } else if (GST_IS_EVENT (object)) {
1025 GstEvent *event = GST_EVENT_CAST (object);
1027 /* For newsegment events return the running time of the start position */
1028 if (GST_EVENT_TYPE (event) == GST_EVENT_NEWSEGMENT) {
1029 GstSegment new_segment = *segment;
1030 gboolean update;
1031 gdouble rate, applied_rate;
1032 GstFormat format;
1033 gint64 start, stop, position;
1035 gst_event_parse_new_segment_full (event, &update, &rate, &applied_rate,
1036 &format, &start, &stop, &position);
1037 if (format == GST_FORMAT_TIME) {
1038 gst_segment_set_newsegment_full (&new_segment, update, rate,
1039 applied_rate, format, start, stop, position);
1041 time =
1042 gst_segment_to_running_time (&new_segment, GST_FORMAT_TIME,
1043 new_segment.start);
1044 }
1045 }
1046 }
1048 done:
1049 return time;
1050 }
1052 static GstFlowReturn
1053 gst_single_queue_push_one (GstMultiQueue * mq, GstSingleQueue * sq,
1054 GstMiniObject * object)
1055 {
1056 GstFlowReturn result = GST_FLOW_OK;
1058 if (GST_IS_BUFFER (object)) {
1059 GstBuffer *buffer;
1060 GstClockTime timestamp, duration;
1061 GstCaps *caps;
1063 buffer = GST_BUFFER_CAST (object);
1064 timestamp = GST_BUFFER_TIMESTAMP (buffer);
1065 duration = GST_BUFFER_DURATION (buffer);
1066 caps = GST_BUFFER_CAPS (buffer);
1068 apply_buffer (mq, sq, timestamp, duration, &sq->src_segment);
1070 /* Applying the buffer may have made the queue non-full again, unblock it if needed */
1071 gst_data_queue_limits_changed (sq->queue);
1073 GST_DEBUG_OBJECT (mq,
1074 "SingleQueue %d : Pushing buffer %p with ts %" GST_TIME_FORMAT,
1075 sq->id, buffer, GST_TIME_ARGS (timestamp));
1077 /* Set caps on pad before pushing, this avoids core calling the acceptcaps
1078 * function on the srcpad, which will call acceptcaps upstream, which might
1079 * not accept these caps (anymore). */
1080 if (caps && caps != GST_PAD_CAPS (sq->srcpad))
1081 gst_pad_set_caps (sq->srcpad, caps);
1083 result = gst_pad_push (sq->srcpad, buffer);
1084 } else if (GST_IS_EVENT (object)) {
1085 GstEvent *event;
1087 event = GST_EVENT_CAST (object);
1089 switch (GST_EVENT_TYPE (event)) {
1090 case GST_EVENT_EOS:
1091 result = GST_FLOW_UNEXPECTED;
1092 break;
1093 case GST_EVENT_NEWSEGMENT:
1094 apply_segment (mq, sq, event, &sq->src_segment);
1095 /* Applying the segment may have made the queue non-full again, unblock it if needed */
1096 gst_data_queue_limits_changed (sq->queue);
1097 break;
1098 default:
1099 break;
1100 }
1102 GST_DEBUG_OBJECT (mq,
1103 "SingleQueue %d : Pushing event %p of type %s",
1104 sq->id, event, GST_EVENT_TYPE_NAME (event));
1106 gst_pad_push_event (sq->srcpad, event);
1107 } else {
1108 g_warning ("Unexpected object in singlequeue %d (refcounting problem?)",
1109 sq->id);
1110 }
1111 return result;
1113 /* ERRORS */
1114 }
1116 static GstMiniObject *
1117 gst_multi_queue_item_steal_object (GstMultiQueueItem * item)
1118 {
1119 GstMiniObject *res;
1121 res = item->object;
1122 item->object = NULL;
1124 return res;
1125 }
1127 static void
1128 gst_multi_queue_item_destroy (GstMultiQueueItem * item)
1129 {
1130 if (item->object)
1131 gst_mini_object_unref (item->object);
1132 g_slice_free (GstMultiQueueItem, item);
1133 }
1135 /* takes ownership of passed mini object! */
1136 static GstMultiQueueItem *
1137 gst_multi_queue_buffer_item_new (GstMiniObject * object, guint32 curid)
1138 {
1139 GstMultiQueueItem *item;
1141 item = g_slice_new (GstMultiQueueItem);
1142 item->object = object;
1143 item->destroy = (GDestroyNotify) gst_multi_queue_item_destroy;
1144 item->posid = curid;
1146 item->size = GST_BUFFER_SIZE (object);
1147 item->duration = GST_BUFFER_DURATION (object);
1148 if (item->duration == GST_CLOCK_TIME_NONE)
1149 item->duration = 0;
1150 item->visible = TRUE;
1151 return item;
1152 }
1154 static GstMultiQueueItem *
1155 gst_multi_queue_event_item_new (GstMiniObject * object, guint32 curid)
1156 {
1157 GstMultiQueueItem *item;
1159 item = g_slice_new (GstMultiQueueItem);
1160 item->object = object;
1161 item->destroy = (GDestroyNotify) gst_multi_queue_item_destroy;
1162 item->posid = curid;
1164 item->size = 0;
1165 item->duration = 0;
1166 item->visible = FALSE;
1167 return item;
1168 }
1170 /* Each main loop attempts to push buffers until the return value
1171 * is not-linked. not-linked pads are not allowed to push data beyond
1172 * any linked pads, so they don't 'rush ahead of the pack'.
1173 */
1174 static void
1175 gst_multi_queue_loop (GstPad * pad)
1176 {
1177 GstSingleQueue *sq;
1178 GstMultiQueueItem *item;
1179 GstDataQueueItem *sitem;
1180 GstMultiQueue *mq;
1181 GstMiniObject *object = NULL;
1182 guint32 newid;
1183 GstFlowReturn result;
1184 GstClockTime next_time;
1186 sq = (GstSingleQueue *) gst_pad_get_element_private (pad);
1187 mq = sq->mqueue;
1189 GST_DEBUG_OBJECT (mq, "SingleQueue %d : trying to pop an object", sq->id);
1191 if (sq->flushing)
1192 goto out_flushing;
1194 /* Get something from the queue, blocking until that happens, or we get
1195 * flushed */
1196 if (!(gst_data_queue_pop (sq->queue, &sitem)))
1197 goto out_flushing;
1199 item = (GstMultiQueueItem *) sitem;
1200 newid = item->posid;
1202 /* steal the object and destroy the item */
1203 object = gst_multi_queue_item_steal_object (item);
1204 gst_multi_queue_item_destroy (item);
1206 /* Get running time of the item. Events will have GST_CLOCK_TIME_NONE */
1207 next_time = get_running_time (&sq->src_segment, object, TRUE);
1209 GST_LOG_OBJECT (mq, "SingleQueue %d : newid:%d , oldid:%d",
1210 sq->id, newid, sq->last_oldid);
1212 /* If we're not-linked, we do some extra work because we might need to
1213 * wait before pushing. If we're linked but there's a gap in the IDs,
1214 * or it's the first loop, or we just passed the previous highid,
1215 * we might need to wake some sleeping pad up, so there's extra work
1216 * there too */
1217 if (sq->srcresult == GST_FLOW_NOT_LINKED
1218 || (sq->last_oldid == G_MAXUINT32) || (newid != (sq->last_oldid + 1))
1219 || sq->last_oldid > mq->highid) {
1220 GST_LOG_OBJECT (mq, "CHECKING sq->srcresult: %s",
1221 gst_flow_get_name (sq->srcresult));
1223 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
1225 /* Check again if we're flushing after the lock is taken,
1226 * the flush flag might have been changed in the meantime */
1227 if (sq->flushing) {
1228 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
1229 goto out_flushing;
1230 }
1232 /* Update the nextid so other threads know when to wake us up */
1233 sq->nextid = newid;
1234 sq->next_time = next_time;
1236 /* Update the oldid (the last ID we output) for highid tracking */
1237 if (sq->last_oldid != G_MAXUINT32)
1238 sq->oldid = sq->last_oldid;
1240 if (sq->srcresult == GST_FLOW_NOT_LINKED) {
1241 /* Go to sleep until it's time to push this buffer */
1243 /* Recompute the highid */
1244 compute_high_id (mq);
1245 /* Recompute the high time */
1246 compute_high_time (mq);
1248 while (((mq->sync_by_running_time && next_time != GST_CLOCK_TIME_NONE &&
1249 (mq->high_time == GST_CLOCK_TIME_NONE
1250 || next_time >= mq->high_time))
1251 || (!mq->sync_by_running_time && newid > mq->highid))
1252 && sq->srcresult == GST_FLOW_NOT_LINKED) {
1254 GST_DEBUG_OBJECT (mq,
1255 "queue %d sleeping for not-linked wakeup with "
1256 "newid %u, highid %u, next_time %" GST_TIME_FORMAT
1257 ", high_time %" GST_TIME_FORMAT, sq->id, newid, mq->highid,
1258 GST_TIME_ARGS (next_time), GST_TIME_ARGS (mq->high_time));
1260 /* Wake up all non-linked pads before we sleep */
1261 wake_up_next_non_linked (mq);
1263 mq->numwaiting++;
1264 g_cond_wait (sq->turn, mq->qlock);
1265 mq->numwaiting--;
1267 if (sq->flushing) {
1268 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
1269 goto out_flushing;
1270 }
1272 /* Recompute the high time */
1273 compute_high_time (mq);
1275 GST_DEBUG_OBJECT (mq, "queue %d woken from sleeping for not-linked "
1276 "wakeup with newid %u, highid %u, next_time %" GST_TIME_FORMAT
1277 ", high_time %" GST_TIME_FORMAT, sq->id, newid, mq->highid,
1278 GST_TIME_ARGS (next_time), GST_TIME_ARGS (mq->high_time));
1279 }
1281 /* Re-compute the high_id in case someone else pushed */
1282 compute_high_id (mq);
1283 } else {
1284 compute_high_id (mq);
1285 /* Wake up all non-linked pads */
1286 wake_up_next_non_linked (mq);
1287 }
1288 /* We're done waiting, we can clear the nextid and nexttime */
1289 sq->nextid = 0;
1290 sq->next_time = GST_CLOCK_TIME_NONE;
1292 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
1293 }
1295 if (sq->flushing)
1296 goto out_flushing;
1298 GST_LOG_OBJECT (mq, "BEFORE PUSHING sq->srcresult: %s",
1299 gst_flow_get_name (sq->srcresult));
1301 /* Update time stats */
1302 next_time = get_running_time (&sq->src_segment, object, FALSE);
1303 if (next_time != GST_CLOCK_TIME_NONE) {
1304 if (sq->last_time == GST_CLOCK_TIME_NONE || sq->last_time < next_time)
1305 sq->last_time = next_time;
1306 if (mq->high_time == GST_CLOCK_TIME_NONE || mq->high_time <= next_time) {
1307 /* Wake up all non-linked pads now that we advanced the high time */
1308 mq->high_time = next_time;
1309 wake_up_next_non_linked (mq);
1310 }
1311 }
1313 /* Try to push out the new object */
1314 result = gst_single_queue_push_one (mq, sq, object);
1315 sq->srcresult = result;
1316 object = NULL;
1318 if (result != GST_FLOW_OK && result != GST_FLOW_NOT_LINKED
1319 && result != GST_FLOW_UNEXPECTED)
1320 goto out_flushing;
1322 GST_LOG_OBJECT (mq, "AFTER PUSHING sq->srcresult: %s",
1323 gst_flow_get_name (sq->srcresult));
1325 sq->last_oldid = newid;
1327 return;
1329 out_flushing:
1330 {
1331 if (object)
1332 gst_mini_object_unref (object);
1334 /* Need to make sure wake up any sleeping pads when we exit */
1335 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
1336 compute_high_id (mq);
1337 wake_up_next_non_linked (mq);
1338 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
1340 /* upstream needs to see fatal result ASAP to shut things down,
1341 * but might be stuck in one of our other full queues;
1342 * so empty this one and trigger dynamic queue growth. At
1343 * this point the srcresult is not OK, NOT_LINKED
1344 * or UNEXPECTED, i.e. a real failure */
1345 gst_data_queue_flush (sq->queue);
1346 single_queue_underrun_cb (sq->queue, sq);
1347 gst_data_queue_set_flushing (sq->queue, TRUE);
1348 gst_pad_pause_task (sq->srcpad);
1349 GST_CAT_LOG_OBJECT (multi_queue_debug, mq,
1350 "SingleQueue[%d] task paused, reason:%s",
1351 sq->id, gst_flow_get_name (sq->srcresult));
1352 return;
1353 }
1354 }
1356 /**
1357 * gst_multi_queue_chain:
1358 *
1359 * This is similar to GstQueue's chain function, except:
1360 * _ we don't have leak behaviours,
1361 * _ we push with a unique id (curid)
1362 */
1363 static GstFlowReturn
1364 gst_multi_queue_chain (GstPad * pad, GstBuffer * buffer)
1365 {
1366 GstSingleQueue *sq;
1367 GstMultiQueue *mq;
1368 GstMultiQueueItem *item;
1369 guint32 curid;
1370 GstClockTime timestamp, duration;
1372 sq = gst_pad_get_element_private (pad);
1373 mq = sq->mqueue;
1375 /* if eos, we are always full, so avoid hanging incoming indefinitely */
1376 if (sq->is_eos)
1377 goto was_eos;
1379 /* Get a unique incrementing id */
1380 curid = G_ATOMIC_INT_ADD ((gint *) & mq->counter, 1);
1382 GST_LOG_OBJECT (mq, "SingleQueue %d : about to enqueue buffer %p with id %d",
1383 sq->id, buffer, curid);
1385 item = gst_multi_queue_buffer_item_new (GST_MINI_OBJECT_CAST (buffer), curid);
1387 timestamp = GST_BUFFER_TIMESTAMP (buffer);
1388 duration = GST_BUFFER_DURATION (buffer);
1390 if (!(gst_data_queue_push (sq->queue, (GstDataQueueItem *) item)))
1391 goto flushing;
1393 /* update time level, we must do this after pushing the data in the queue so
1394 * that we never end up filling the queue first. */
1395 apply_buffer (mq, sq, timestamp, duration, &sq->sink_segment);
1397 done:
1398 return sq->srcresult;
1400 /* ERRORS */
1401 flushing:
1402 {
1403 GST_LOG_OBJECT (mq, "SingleQueue %d : exit because task paused, reason: %s",
1404 sq->id, gst_flow_get_name (sq->srcresult));
1405 gst_multi_queue_item_destroy (item);
1406 goto done;
1407 }
1408 was_eos:
1409 {
1410 GST_DEBUG_OBJECT (mq, "we are EOS, dropping buffer, return UNEXPECTED");
1411 gst_buffer_unref (buffer);
1412 return GST_FLOW_UNEXPECTED;
1413 }
1414 }
1416 static gboolean
1417 gst_multi_queue_sink_activate_push (GstPad * pad, gboolean active)
1418 {
1419 GstSingleQueue *sq;
1421 sq = (GstSingleQueue *) gst_pad_get_element_private (pad);
1423 if (active) {
1424 /* All pads start off linked until they push one buffer */
1425 sq->srcresult = GST_FLOW_OK;
1426 } else {
1427 sq->srcresult = GST_FLOW_WRONG_STATE;
1428 gst_data_queue_flush (sq->queue);
1429 }
1430 return TRUE;
1431 }
1433 static gboolean
1434 gst_multi_queue_sink_event (GstPad * pad, GstEvent * event)
1435 {
1436 GstSingleQueue *sq;
1437 GstMultiQueue *mq;
1438 guint32 curid;
1439 GstMultiQueueItem *item;
1440 gboolean res;
1441 GstEventType type;
1442 GstEvent *sref = NULL;
1444 sq = (GstSingleQueue *) gst_pad_get_element_private (pad);
1445 mq = (GstMultiQueue *) gst_pad_get_parent (pad);
1447 type = GST_EVENT_TYPE (event);
1449 switch (type) {
1450 case GST_EVENT_FLUSH_START:
1451 GST_DEBUG_OBJECT (mq, "SingleQueue %d : received flush start event",
1452 sq->id);
1454 res = gst_pad_push_event (sq->srcpad, event);
1456 gst_single_queue_flush (mq, sq, TRUE);
1457 goto done;
1459 case GST_EVENT_FLUSH_STOP:
1460 GST_DEBUG_OBJECT (mq, "SingleQueue %d : received flush stop event",
1461 sq->id);
1463 res = gst_pad_push_event (sq->srcpad, event);
1465 gst_single_queue_flush (mq, sq, FALSE);
1466 goto done;
1467 case GST_EVENT_NEWSEGMENT:
1468 /* take ref because the queue will take ownership and we need the event
1469 * afterwards to update the segment */
1470 sref = gst_event_ref (event);
1471 break;
1473 default:
1474 if (!(GST_EVENT_IS_SERIALIZED (event))) {
1475 res = gst_pad_push_event (sq->srcpad, event);
1476 goto done;
1477 }
1478 break;
1479 }
1481 /* if eos, we are always full, so avoid hanging incoming indefinitely */
1482 if (sq->is_eos)
1483 goto was_eos;
1485 /* Get an unique incrementing id. */
1486 curid = G_ATOMIC_INT_ADD ((gint *) & mq->counter, 1);
1488 item = gst_multi_queue_event_item_new ((GstMiniObject *) event, curid);
1490 GST_DEBUG_OBJECT (mq,
1491 "SingleQueue %d : Enqueuing event %p of type %s with id %d",
1492 sq->id, event, GST_EVENT_TYPE_NAME (event), curid);
1494 if (!(res = gst_data_queue_push (sq->queue, (GstDataQueueItem *) item)))
1495 goto flushing;
1497 /* mark EOS when we received one, we must do that after putting the
1498 * buffer in the queue because EOS marks the buffer as filled. No need to take
1499 * a lock, the _check_full happens from this thread only, right before pushing
1500 * into dataqueue. */
1501 switch (type) {
1502 case GST_EVENT_EOS:
1503 sq->is_eos = TRUE;
1504 /* EOS affects the buffering state */
1505 update_buffering (mq, sq);
1506 single_queue_overrun_cb (sq->queue, sq);
1507 break;
1508 case GST_EVENT_NEWSEGMENT:
1509 apply_segment (mq, sq, sref, &sq->sink_segment);
1510 gst_event_unref (sref);
1511 break;
1512 default:
1513 break;
1514 }
1515 done:
1516 gst_object_unref (mq);
1517 return res;
1519 flushing:
1520 {
1521 GST_LOG_OBJECT (mq, "SingleQueue %d : exit because task paused, reason: %s",
1522 sq->id, gst_flow_get_name (sq->srcresult));
1523 if (sref)
1524 gst_event_unref (sref);
1525 gst_multi_queue_item_destroy (item);
1526 goto done;
1527 }
1528 was_eos:
1529 {
1530 GST_DEBUG_OBJECT (mq, "we are EOS, dropping event, return FALSE");
1531 gst_event_unref (event);
1532 res = FALSE;
1533 goto done;
1534 }
1535 }
1537 static GstCaps *
1538 gst_multi_queue_getcaps (GstPad * pad)
1539 {
1540 GstSingleQueue *sq = gst_pad_get_element_private (pad);
1541 GstPad *otherpad;
1542 GstCaps *result;
1544 otherpad = (pad == sq->srcpad) ? sq->sinkpad : sq->srcpad;
1546 GST_LOG_OBJECT (otherpad, "Getting caps from the peer of this pad");
1548 result = gst_pad_peer_get_caps (otherpad);
1549 if (result == NULL)
1550 result = gst_caps_new_any ();
1552 return result;
1553 }
1555 static gboolean
1556 gst_multi_queue_acceptcaps (GstPad * pad, GstCaps * caps)
1557 {
1558 GstSingleQueue *sq = gst_pad_get_element_private (pad);
1559 GstPad *otherpad;
1560 gboolean result;
1562 otherpad = (pad == sq->srcpad) ? sq->sinkpad : sq->srcpad;
1564 GST_LOG_OBJECT (otherpad, "Accept caps from the peer of this pad");
1566 result = gst_pad_peer_accept_caps (otherpad, caps);
1568 return result;
1569 }
1571 static GstFlowReturn
1572 gst_multi_queue_bufferalloc (GstPad * pad, guint64 offset, guint size,
1573 GstCaps * caps, GstBuffer ** buf)
1574 {
1575 GstSingleQueue *sq = gst_pad_get_element_private (pad);
1577 return gst_pad_alloc_buffer (sq->srcpad, offset, size, caps, buf);
1578 }
1580 static gboolean
1581 gst_multi_queue_src_activate_push (GstPad * pad, gboolean active)
1582 {
1583 GstMultiQueue *mq;
1584 GstSingleQueue *sq;
1585 gboolean result = FALSE;
1587 sq = (GstSingleQueue *) gst_pad_get_element_private (pad);
1588 mq = sq->mqueue;
1590 GST_DEBUG_OBJECT (mq, "SingleQueue %d", sq->id);
1592 if (active) {
1593 result = gst_single_queue_flush (mq, sq, FALSE);
1594 } else {
1595 result = gst_single_queue_flush (mq, sq, TRUE);
1596 /* make sure streaming finishes */
1597 result |= gst_pad_stop_task (pad);
1598 }
1599 return result;
1600 }
1602 static gboolean
1603 gst_multi_queue_src_event (GstPad * pad, GstEvent * event)
1604 {
1605 GstSingleQueue *sq = gst_pad_get_element_private (pad);
1607 return gst_pad_push_event (sq->sinkpad, event);
1608 }
1610 static gboolean
1611 gst_multi_queue_src_query (GstPad * pad, GstQuery * query)
1612 {
1613 GstSingleQueue *sq = gst_pad_get_element_private (pad);
1614 GstPad *peerpad;
1615 gboolean res;
1617 /* FIXME, Handle position offset depending on queue size */
1619 /* default handling */
1620 if (!(peerpad = gst_pad_get_peer (sq->sinkpad)))
1621 goto no_peer;
1623 res = gst_pad_query (peerpad, query);
1625 gst_object_unref (peerpad);
1627 return res;
1629 /* ERRORS */
1630 no_peer:
1631 {
1632 GST_LOG_OBJECT (sq->sinkpad, "Couldn't send query because we have no peer");
1633 return FALSE;
1634 }
1635 }
1637 /*
1638 * Next-non-linked functions
1639 */
1641 /* WITH LOCK TAKEN */
1642 static void
1643 wake_up_next_non_linked (GstMultiQueue * mq)
1644 {
1645 GList *tmp;
1647 /* maybe no-one is waiting */
1648 if (mq->numwaiting < 1)
1649 return;
1651 /* Else figure out which singlequeue(s) need waking up */
1652 for (tmp = mq->queues; tmp; tmp = g_list_next (tmp)) {
1653 GstSingleQueue *sq = (GstSingleQueue *) tmp->data;
1655 if (sq->srcresult == GST_FLOW_NOT_LINKED) {
1656 if ((mq->sync_by_running_time && mq->high_time != GST_CLOCK_TIME_NONE
1657 && sq->next_time != GST_CLOCK_TIME_NONE
1658 && sq->next_time >= mq->high_time)
1659 || (sq->nextid != 0 && sq->nextid <= mq->highid)) {
1660 GST_LOG_OBJECT (mq, "Waking up singlequeue %d", sq->id);
1661 g_cond_signal (sq->turn);
1662 }
1663 }
1664 }
1665 }
1667 /* WITH LOCK TAKEN */
1668 static void
1669 compute_high_id (GstMultiQueue * mq)
1670 {
1671 /* The high-id is either the highest id among the linked pads, or if all
1672 * pads are not-linked, it's the lowest not-linked pad */
1673 GList *tmp;
1674 guint32 lowest = G_MAXUINT32;
1675 guint32 highid = G_MAXUINT32;
1677 for (tmp = mq->queues; tmp; tmp = g_list_next (tmp)) {
1678 GstSingleQueue *sq = (GstSingleQueue *) tmp->data;
1680 GST_LOG_OBJECT (mq, "inspecting sq:%d , nextid:%d, oldid:%d, srcresult:%s",
1681 sq->id, sq->nextid, sq->oldid, gst_flow_get_name (sq->srcresult));
1683 if (sq->srcresult == GST_FLOW_NOT_LINKED) {
1684 /* No need to consider queues which are not waiting */
1685 if (sq->nextid == 0) {
1686 GST_LOG_OBJECT (mq, "sq:%d is not waiting - ignoring", sq->id);
1687 continue;
1688 }
1690 if (sq->nextid < lowest)
1691 lowest = sq->nextid;
1692 } else if (sq->srcresult != GST_FLOW_UNEXPECTED) {
1693 /* If we don't have a global highid, or the global highid is lower than
1694 * this single queue's last outputted id, store the queue's one,
1695 * unless the singlequeue is at EOS (srcresult = UNEXPECTED) */
1696 if ((highid == G_MAXUINT32) || (sq->oldid > highid))
1697 highid = sq->oldid;
1698 }
1699 }
1701 if (highid == G_MAXUINT32 || lowest < highid)
1702 mq->highid = lowest;
1703 else
1704 mq->highid = highid;
1706 GST_LOG_OBJECT (mq, "Highid is now : %u, lowest non-linked %u", mq->highid,
1707 lowest);
1708 }
1710 /* WITH LOCK TAKEN */
1711 static void
1712 compute_high_time (GstMultiQueue * mq)
1713 {
1714 /* The high-id is either the highest id among the linked pads, or if all
1715 * pads are not-linked, it's the lowest not-linked pad */
1716 GList *tmp;
1717 GstClockTime highest = GST_CLOCK_TIME_NONE;
1718 GstClockTime lowest = GST_CLOCK_TIME_NONE;
1720 for (tmp = mq->queues; tmp; tmp = g_list_next (tmp)) {
1721 GstSingleQueue *sq = (GstSingleQueue *) tmp->data;
1723 GST_LOG_OBJECT (mq,
1724 "inspecting sq:%d , next_time:%" GST_TIME_FORMAT ", last_time:%"
1725 GST_TIME_FORMAT ", srcresult:%s", sq->id, GST_TIME_ARGS (sq->next_time),
1726 GST_TIME_ARGS (sq->last_time), gst_flow_get_name (sq->srcresult));
1728 if (sq->srcresult == GST_FLOW_NOT_LINKED) {
1729 /* No need to consider queues which are not waiting */
1730 if (sq->next_time == GST_CLOCK_TIME_NONE) {
1731 GST_LOG_OBJECT (mq, "sq:%d is not waiting - ignoring", sq->id);
1732 continue;
1733 }
1735 if (lowest == GST_CLOCK_TIME_NONE || sq->next_time < lowest)
1736 lowest = sq->next_time;
1737 } else if (sq->srcresult != GST_FLOW_UNEXPECTED) {
1738 /* If we don't have a global highid, or the global highid is lower than
1739 * this single queue's last outputted id, store the queue's one,
1740 * unless the singlequeue is at EOS (srcresult = UNEXPECTED) */
1741 if (highest == GST_CLOCK_TIME_NONE || sq->last_time > highest)
1742 highest = sq->last_time;
1743 }
1744 }
1746 mq->high_time = highest;
1748 GST_LOG_OBJECT (mq,
1749 "High time is now : %" GST_TIME_FORMAT ", lowest non-linked %"
1750 GST_TIME_FORMAT, GST_TIME_ARGS (mq->high_time), GST_TIME_ARGS (lowest));
1751 }
1753 #define IS_FILLED(q, format, value) (((q)->max_size.format) != 0 && \
1754 ((q)->max_size.format) <= (value))
1756 /*
1757 * GstSingleQueue functions
1758 */
1759 static void
1760 single_queue_overrun_cb (GstDataQueue * dq, GstSingleQueue * sq)
1761 {
1762 GstMultiQueue *mq = sq->mqueue;
1763 GList *tmp;
1764 GstDataQueueSize size;
1765 gboolean filled = FALSE;
1767 gst_data_queue_get_level (sq->queue, &size);
1769 GST_LOG_OBJECT (mq, "Single Queue %d is full", sq->id);
1771 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
1772 for (tmp = mq->queues; tmp; tmp = g_list_next (tmp)) {
1773 GstSingleQueue *oq = (GstSingleQueue *) tmp->data;
1774 GstDataQueueSize ssize;
1776 GST_LOG_OBJECT (mq, "Checking Queue %d", oq->id);
1778 if (gst_data_queue_is_empty (oq->queue)) {
1779 GST_LOG_OBJECT (mq, "Queue %d is empty", oq->id);
1780 if (IS_FILLED (sq, visible, size.visible)) {
1781 sq->max_size.visible = size.visible + 1;
1782 GST_DEBUG_OBJECT (mq,
1783 "Another queue is empty, bumping single queue %d max visible to %d",
1784 sq->id, sq->max_size.visible);
1785 }
1786 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
1787 goto beach;
1788 }
1789 /* check if we reached the hard time/bytes limits */
1790 gst_data_queue_get_level (oq->queue, &ssize);
1792 GST_DEBUG_OBJECT (mq,
1793 "queue %d: visible %u/%u, bytes %u/%u, time %" G_GUINT64_FORMAT "/%"
1794 G_GUINT64_FORMAT, oq->id, ssize.visible, oq->max_size.visible,
1795 ssize.bytes, oq->max_size.bytes, oq->cur_time, oq->max_size.time);
1797 /* if this queue is filled completely we must signal overrun.
1798 * FIXME, this seems wrong in many ways
1799 * - we're comparing the filled level of this queue against the
1800 * values of the other one
1801 * - we should only do this after we found no empty queues, ie, move
1802 * this check outside of the loop
1803 * - the debug statement talks about a different queue than the one
1804 * we are checking here.
1805 */
1806 if (sq->is_eos || IS_FILLED (sq, bytes, ssize.bytes) ||
1807 IS_FILLED (sq, time, sq->cur_time)) {
1808 GST_LOG_OBJECT (mq, "Queue %d is filled", oq->id);
1809 filled = TRUE;
1810 }
1811 }
1812 /* no queues were empty */
1813 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
1815 /* Overrun is always forwarded, since this is blocking the upstream element */
1816 if (filled) {
1817 GST_DEBUG_OBJECT (mq, "A queue is filled, signalling overrun");
1818 g_signal_emit (mq, gst_multi_queue_signals[SIGNAL_OVERRUN], 0);
1819 }
1821 beach:
1822 return;
1823 }
1825 static void
1826 single_queue_underrun_cb (GstDataQueue * dq, GstSingleQueue * sq)
1827 {
1828 gboolean empty = TRUE;
1829 GstMultiQueue *mq = sq->mqueue;
1830 GList *tmp;
1832 GST_LOG_OBJECT (mq,
1833 "Single Queue %d is empty, Checking other single queues", sq->id);
1835 GST_MULTI_QUEUE_MUTEX_LOCK (mq);
1836 for (tmp = mq->queues; tmp; tmp = g_list_next (tmp)) {
1837 GstSingleQueue *oq = (GstSingleQueue *) tmp->data;
1839 if (gst_data_queue_is_full (oq->queue)) {
1840 GstDataQueueSize size;
1842 gst_data_queue_get_level (oq->queue, &size);
1843 if (IS_FILLED (oq, visible, size.visible)) {
1844 oq->max_size.visible = size.visible + 1;
1845 GST_DEBUG_OBJECT (mq,
1846 "queue %d is filled, bumping its max visible to %d", oq->id,
1847 oq->max_size.visible);
1848 gst_data_queue_limits_changed (oq->queue);
1849 }
1850 }
1851 if (!gst_data_queue_is_empty (oq->queue))
1852 empty = FALSE;
1853 }
1854 GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
1856 if (empty) {
1857 GST_DEBUG_OBJECT (mq, "All queues are empty, signalling it");
1858 g_signal_emit (mq, gst_multi_queue_signals[SIGNAL_UNDERRUN], 0);
1859 }
1860 }
1862 static gboolean
1863 single_queue_check_full (GstDataQueue * dataq, guint visible, guint bytes,
1864 guint64 time, GstSingleQueue * sq)
1865 {
1866 gboolean res;
1867 GstMultiQueue *mq = sq->mqueue;
1869 GST_DEBUG_OBJECT (mq,
1870 "queue %d: visible %u/%u, bytes %u/%u, time %" G_GUINT64_FORMAT "/%"
1871 G_GUINT64_FORMAT, sq->id, visible, sq->max_size.visible, bytes,
1872 sq->max_size.bytes, sq->cur_time, sq->max_size.time);
1874 /* we are always filled on EOS */
1875 if (sq->is_eos)
1876 return TRUE;
1878 /* we never go past the max visible items unless we are in buffering mode */
1879 if (!mq->use_buffering && IS_FILLED (sq, visible, visible))
1880 return TRUE;
1882 /* check time or bytes */
1883 res = IS_FILLED (sq, time, sq->cur_time) || IS_FILLED (sq, bytes, bytes);
1885 return res;
1886 }
1888 static void
1889 gst_single_queue_free (GstSingleQueue * sq)
1890 {
1891 /* DRAIN QUEUE */
1892 gst_data_queue_flush (sq->queue);
1893 g_object_unref (sq->queue);
1894 g_cond_free (sq->turn);
1895 g_free (sq);
1896 }
1898 static GstSingleQueue *
1899 gst_single_queue_new (GstMultiQueue * mqueue, gint id)
1900 {
1901 GstSingleQueue *sq;
1902 gchar *name;
1903 GList *tmp;
1904 gint temp_id = (id == -1) ? 0 : id;
1906 GST_MULTI_QUEUE_MUTEX_LOCK (mqueue);
1908 /* Find an unused queue ID, if possible the passed one */
1909 for (tmp = mqueue->queues; tmp; tmp = g_list_next (tmp)) {
1910 GstSingleQueue *sq2 = (GstSingleQueue *) tmp->data;
1911 /* This works because the IDs are sorted in ascending order */
1912 if (sq2->id == temp_id) {
1913 /* If this ID was requested by the caller return NULL,
1914 * otherwise just get us the next one */
1915 if (id == -1)
1916 temp_id = sq2->id + 1;
1917 else
1918 return NULL;
1919 } else if (sq2->id > temp_id) {
1920 break;
1921 }
1922 }
1924 sq = g_new0 (GstSingleQueue, 1);
1925 mqueue->nbqueues++;
1926 sq->id = temp_id;
1928 mqueue->queues = g_list_insert_before (mqueue->queues, tmp, sq);
1929 mqueue->queues_cookie++;
1931 /* copy over max_size and extra_size so we don't need to take the lock
1932 * any longer when checking if the queue is full. */
1933 sq->max_size.visible = mqueue->max_size.visible;
1934 sq->max_size.bytes = mqueue->max_size.bytes;
1935 sq->max_size.time = mqueue->max_size.time;
1937 sq->extra_size.visible = mqueue->extra_size.visible;
1938 sq->extra_size.bytes = mqueue->extra_size.bytes;
1939 sq->extra_size.time = mqueue->extra_size.time;
1941 GST_DEBUG_OBJECT (mqueue, "Creating GstSingleQueue id:%d", sq->id);
1943 sq->mqueue = mqueue;
1944 sq->srcresult = GST_FLOW_WRONG_STATE;
1945 sq->queue = gst_data_queue_new_full ((GstDataQueueCheckFullFunction)
1946 single_queue_check_full,
1947 (GstDataQueueFullCallback) single_queue_overrun_cb,
1948 (GstDataQueueEmptyCallback) single_queue_underrun_cb, sq);
1949 sq->is_eos = FALSE;
1950 sq->flushing = FALSE;
1951 gst_segment_init (&sq->sink_segment, GST_FORMAT_TIME);
1952 gst_segment_init (&sq->src_segment, GST_FORMAT_TIME);
1954 sq->nextid = 0;
1955 sq->oldid = 0;
1956 sq->next_time = GST_CLOCK_TIME_NONE;
1957 sq->last_time = GST_CLOCK_TIME_NONE;
1958 sq->turn = g_cond_new ();
1960 sq->sinktime = GST_CLOCK_TIME_NONE;
1961 sq->srctime = GST_CLOCK_TIME_NONE;
1962 sq->sink_tainted = TRUE;
1963 sq->src_tainted = TRUE;
1965 name = g_strdup_printf ("sink%d", sq->id);
1966 sq->sinkpad = gst_pad_new_from_static_template (&sinktemplate, name);
1967 g_free (name);
1969 gst_pad_set_chain_function (sq->sinkpad,
1970 GST_DEBUG_FUNCPTR (gst_multi_queue_chain));
1971 gst_pad_set_activatepush_function (sq->sinkpad,
1972 GST_DEBUG_FUNCPTR (gst_multi_queue_sink_activate_push));
1973 gst_pad_set_event_function (sq->sinkpad,
1974 GST_DEBUG_FUNCPTR (gst_multi_queue_sink_event));
1975 gst_pad_set_getcaps_function (sq->sinkpad,
1976 GST_DEBUG_FUNCPTR (gst_multi_queue_getcaps));
1977 gst_pad_set_acceptcaps_function (sq->sinkpad,
1978 GST_DEBUG_FUNCPTR (gst_multi_queue_acceptcaps));
1979 gst_pad_set_bufferalloc_function (sq->sinkpad,
1980 GST_DEBUG_FUNCPTR (gst_multi_queue_bufferalloc));
1981 gst_pad_set_iterate_internal_links_function (sq->sinkpad,
1982 GST_DEBUG_FUNCPTR (gst_multi_queue_iterate_internal_links));
1984 name = g_strdup_printf ("src%d", sq->id);
1985 sq->srcpad = gst_pad_new_from_static_template (&srctemplate, name);
1986 g_free (name);
1988 gst_pad_set_activatepush_function (sq->srcpad,
1989 GST_DEBUG_FUNCPTR (gst_multi_queue_src_activate_push));
1990 gst_pad_set_getcaps_function (sq->srcpad,
1991 GST_DEBUG_FUNCPTR (gst_multi_queue_getcaps));
1992 gst_pad_set_acceptcaps_function (sq->srcpad,
1993 GST_DEBUG_FUNCPTR (gst_multi_queue_acceptcaps));
1994 gst_pad_set_event_function (sq->srcpad,
1995 GST_DEBUG_FUNCPTR (gst_multi_queue_src_event));
1996 gst_pad_set_query_function (sq->srcpad,
1997 GST_DEBUG_FUNCPTR (gst_multi_queue_src_query));
1998 gst_pad_set_iterate_internal_links_function (sq->srcpad,
1999 GST_DEBUG_FUNCPTR (gst_multi_queue_iterate_internal_links));
2001 gst_pad_set_element_private (sq->sinkpad, (gpointer) sq);
2002 gst_pad_set_element_private (sq->srcpad, (gpointer) sq);
2004 GST_MULTI_QUEUE_MUTEX_UNLOCK (mqueue);
2006 /* only activate the pads when we are not in the NULL state
2007 * and add the pad under the state_lock to prevend state changes
2008 * between activating and adding */
2009 g_static_rec_mutex_lock (GST_STATE_GET_LOCK (mqueue));
2010 if (GST_STATE_TARGET (mqueue) != GST_STATE_NULL) {
2011 gst_pad_set_active (sq->srcpad, TRUE);
2012 gst_pad_set_active (sq->sinkpad, TRUE);
2013 }
2014 gst_element_add_pad (GST_ELEMENT (mqueue), sq->srcpad);
2015 gst_element_add_pad (GST_ELEMENT (mqueue), sq->sinkpad);
2016 g_static_rec_mutex_unlock (GST_STATE_GET_LOCK (mqueue));
2018 GST_DEBUG_OBJECT (mqueue, "GstSingleQueue [%d] created and pads added",
2019 sq->id);
2021 return sq;
2022 }