1/* GStreamer
2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wtay@chello.be>
4 * 2005 Wim Taymans <wim@fluendo.com>
5 *
6 * gstclock.h: Header for clock subsystem
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
17 *
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
22 */
23
24#ifndef __GST_CLOCK_H__
25#define __GST_CLOCK_H__
26
27#include <gst/gstconfig.h>
28#include <glib.h>
29
30G_BEGIN_DECLS
31
32/* --- standard type macros --- */
33#define GST_TYPE_CLOCK (gst_clock_get_type ())
34#define GST_CLOCK(clock) (G_TYPE_CHECK_INSTANCE_CAST ((clock), GST_TYPE_CLOCK, GstClock))
35#define GST_IS_CLOCK(clock) (G_TYPE_CHECK_INSTANCE_TYPE ((clock), GST_TYPE_CLOCK))
36#define GST_CLOCK_CLASS(cclass) (G_TYPE_CHECK_CLASS_CAST ((cclass), GST_TYPE_CLOCK, GstClockClass))
37#define GST_IS_CLOCK_CLASS(cclass) (G_TYPE_CHECK_CLASS_TYPE ((cclass), GST_TYPE_CLOCK))
38#define GST_CLOCK_GET_CLASS(clock) (G_TYPE_INSTANCE_GET_CLASS ((clock), GST_TYPE_CLOCK, GstClockClass))
39#define GST_CLOCK_CAST(clock) ((GstClock*)(clock))
40
41/**
42 * GstClockTime:
43 *
44 * A datatype to hold a time, measured in nanoseconds.
45 */
46typedef guint64 GstClockTime;
47
48/**
49 * GST_TYPE_CLOCK_TIME:
50 *
51 * The #GType of a #GstClockTime.
52 */
53#define GST_TYPE_CLOCK_TIME G_TYPE_UINT64
54
55/**
56 * GstClockTimeDiff:
57 *
58 * A datatype to hold a time difference, measured in nanoseconds.
59 */
60typedef gint64 GstClockTimeDiff;
61/**
62 * GstClockID:
63 *
64 * A datatype to hold the handle to an outstanding sync or async clock callback.
65 */
66typedef gpointer GstClockID;
67
68/**
69 * GST_CLOCK_TIME_NONE: (value 18446744073709551615) (type GstClockTime)
70 *
71 * Constant to define an undefined clock time.
72 */
73#define GST_CLOCK_TIME_NONE ((GstClockTime) -1)
74/**
75 * GST_CLOCK_TIME_IS_VALID:
76 * @time: clock time to validate
77 *
78 * Tests if a given #GstClockTime represents a valid defined time.
79 */
80#define GST_CLOCK_TIME_IS_VALID(time) (((GstClockTime)(time)) != GST_CLOCK_TIME_NONE)
81
82/**
83 * GST_CLOCK_STIME_NONE: (value -9223372036854775808) (type GstClockTimeDiff)
84 *
85 * Constant to define an undefined clock time.
86 */
87#define GST_CLOCK_STIME_NONE ((GstClockTimeDiff)G_MININT64)
88/**
89 * GST_CLOCK_STIME_IS_VALID:
90 * @time: signed clock time to validate
91 *
92 * Tests if a given #GstClockTimeDiff of #gint64 represents a valid defined time.
93 *
94 * Since: 1.6
95 */
96#define GST_CLOCK_STIME_IS_VALID(time) (((GstClockTimeDiff)(time)) != GST_CLOCK_STIME_NONE)
97
98/**
99 * GST_SECOND: (value 1000000000) (type GstClockTimeDiff)
100 *
101 * Constant that defines one GStreamer second.
102 */
103#define GST_SECOND ((GstClockTimeDiff)(G_USEC_PER_SEC * G_GINT64_CONSTANT (1000)))
104/**
105 * GST_MSECOND: (value 1000000) (type GstClockTimeDiff)
106 *
107 * Constant that defines one GStreamer millisecond.
108 */
109#define GST_MSECOND ((GstClockTimeDiff)(GST_SECOND / G_GINT64_CONSTANT (1000)))
110/**
111 * GST_USECOND: (value 1000) (type GstClockTimeDiff)
112 *
113 * Constant that defines one GStreamer microsecond.
114 */
115#define GST_USECOND ((GstClockTimeDiff)(GST_SECOND / G_GINT64_CONSTANT (1000000)))
116/**
117 * GST_NSECOND: (value 1) (type GstClockTimeDiff)
118 *
119 * Constant that defines one GStreamer nanosecond
120 */
121#define GST_NSECOND ((GstClockTimeDiff)(GST_SECOND / G_GINT64_CONSTANT (1000000000)))
122
123
124/**
125 * GST_TIME_AS_SECONDS:
126 * @time: the time
127 *
128 * Convert a #GstClockTime to seconds.
129 */
130#define GST_TIME_AS_SECONDS(time) ((time) / GST_SECOND)
131/**
132 * GST_TIME_AS_MSECONDS:
133 * @time: the time
134 *
135 * Convert a #GstClockTime to milliseconds (1/1000 of a second).
136 */
137#define GST_TIME_AS_MSECONDS(time) ((time) / G_GINT64_CONSTANT (1000000))
138/**
139 * GST_TIME_AS_USECONDS:
140 * @time: the time
141 *
142 * Convert a #GstClockTime to microseconds (1/1000000 of a second).
143 */
144#define GST_TIME_AS_USECONDS(time) ((time) / G_GINT64_CONSTANT (1000))
145/**
146 * GST_TIME_AS_NSECONDS:
147 * @time: the time
148 *
149 * Convert a #GstClockTime to nanoseconds (1/1000000000 of a second).
150 */
151#define GST_TIME_AS_NSECONDS(time) (time)
152
153/**
154 * GST_CLOCK_DIFF:
155 * @s: the first time
156 * @e: the second time
157 *
158 * Calculate a difference between two clock times as a #GstClockTimeDiff.
159 * The difference is calculated as @e - @s.
160 */
161#define GST_CLOCK_DIFF(s, e) (GstClockTimeDiff)((e) - (s))
162
163/**
164 * GST_TIMEVAL_TO_TIME:
165 * @tv: the timeval to convert
166 *
167 * Convert a #GTimeVal to a #GstClockTime.
168 */
169#define GST_TIMEVAL_TO_TIME(tv) (GstClockTime)((tv).tv_sec * GST_SECOND + (tv).tv_usec * GST_USECOND)
170
171/**
172 * GST_TIME_TO_TIMEVAL:
173 * @t: The #GstClockTime to convert
174 * @tv: The target timeval
175 *
176 * Convert a #GstClockTime to a #GTimeVal
177 *
178 * > on 32-bit systems, a timeval has a range of only 2^32 - 1 seconds,
179 * > which is about 68 years. Expect trouble if you want to schedule stuff
180 * > in your pipeline for 2038.
181 */
182#define GST_TIME_TO_TIMEVAL(t,tv) \
183G_STMT_START { \
184 g_assert ("Value of time " #t " is out of timeval's range" && \
185 ((t) / GST_SECOND) < G_MAXLONG); \
186 (tv).tv_sec = (glong) (((GstClockTime) (t)) / GST_SECOND); \
187 (tv).tv_usec = (glong) ((((GstClockTime) (t)) - \
188 ((GstClockTime) (tv).tv_sec) * GST_SECOND) \
189 / GST_USECOND); \
190} G_STMT_END
191
192/**
193 * GST_TIMESPEC_TO_TIME:
194 * @ts: the timespec to convert
195 *
196 * Convert a struct timespec (see man pselect) to a #GstClockTime.
197 */
198#define GST_TIMESPEC_TO_TIME(ts) (GstClockTime)((ts).tv_sec * GST_SECOND + (ts).tv_nsec * GST_NSECOND)
199/**
200 * GST_TIME_TO_TIMESPEC:
201 * @t: The #GstClockTime to convert
202 * @ts: The target timespec
203 *
204 * Convert a #GstClockTime to a struct timespec (see man pselect)
205 */
206#define GST_TIME_TO_TIMESPEC(t,ts) \
207G_STMT_START { \
208 g_assert ("Value of time " #t " is out of timespec's range" && \
209 ((t) / GST_SECOND) < G_MAXLONG); \
210 (ts).tv_sec = (glong) ((t) / GST_SECOND); \
211 (ts).tv_nsec = (glong) (((t) - (ts).tv_sec * GST_SECOND) / GST_NSECOND); \
212} G_STMT_END
213
214/* timestamp debugging macros */
215/**
216 * GST_TIME_FORMAT: (skip):
217 *
218 * A string that can be used in printf-like format strings to display a
219 * #GstClockTime value in h:m:s format. Use GST_TIME_ARGS() to construct
220 * the matching arguments.
221 *
222 * Example:
223 * |[<!-- language="C" -->
224 * printf("%" GST_TIME_FORMAT "\n", GST_TIME_ARGS(ts));
225 * ]|
226 */
227#define GST_TIME_FORMAT "u:%02u:%02u.%09u"
228/**
229 * GST_TIME_ARGS: (skip):
230 * @t: a #GstClockTime
231 *
232 * Format @t for the #GST_TIME_FORMAT format string. Note: @t will be
233 * evaluated more than once.
234 */
235#define GST_TIME_ARGS(t) \
236 GST_CLOCK_TIME_IS_VALID (t) ? \
237 (guint) (((GstClockTime)(t)) / (GST_SECOND * 60 * 60)) : 99, \
238 GST_CLOCK_TIME_IS_VALID (t) ? \
239 (guint) ((((GstClockTime)(t)) / (GST_SECOND * 60)) % 60) : 99, \
240 GST_CLOCK_TIME_IS_VALID (t) ? \
241 (guint) ((((GstClockTime)(t)) / GST_SECOND) % 60) : 99, \
242 GST_CLOCK_TIME_IS_VALID (t) ? \
243 (guint) (((GstClockTime)(t)) % GST_SECOND) : 999999999
244/**
245 * GST_STIME_FORMAT: (skip):
246 *
247 * A string that can be used in printf-like format strings to display a signed
248 * #GstClockTimeDiff or #gint64 value in h:m:s format. Use GST_TIME_ARGS() to
249 * construct the matching arguments.
250 *
251 * Example:
252 * |[
253 * printf("%" GST_STIME_FORMAT "\n", GST_STIME_ARGS(ts));
254 * ]|
255 *
256 * Since: 1.6
257 */
258#define GST_STIME_FORMAT "c%" GST_TIME_FORMAT
259/**
260 * GST_STIME_ARGS: (skip):
261 * @t: a #GstClockTimeDiff or #gint64
262 *
263 * Format @t for the #GST_STIME_FORMAT format string. Note: @t will be
264 * evaluated more than once.
265 *
266 * Since: 1.6
267 */
268#define GST_STIME_ARGS(t) \
269 ((t) == GST_CLOCK_STIME_NONE || (t) >= 0) ? '+' : '-', \
270 GST_CLOCK_STIME_IS_VALID (t) ? \
271 (guint) (((GstClockTime)(ABS(t))) / (GST_SECOND * 60 * 60)) : 99, \
272 GST_CLOCK_STIME_IS_VALID (t) ? \
273 (guint) ((((GstClockTime)(ABS(t))) / (GST_SECOND * 60)) % 60) : 99, \
274 GST_CLOCK_STIME_IS_VALID (t) ? \
275 (guint) ((((GstClockTime)(ABS(t))) / GST_SECOND) % 60) : 99, \
276 GST_CLOCK_STIME_IS_VALID (t) ? \
277 (guint) (((GstClockTime)(ABS(t))) % GST_SECOND) : 999999999
278
279typedef struct _GstClockEntry GstClockEntry;
280typedef struct _GstClock GstClock;
281typedef struct _GstClockClass GstClockClass;
282typedef struct _GstClockPrivate GstClockPrivate;
283
284/* --- prototype for async callbacks --- */
285/**
286 * GstClockCallback:
287 * @clock: The clock that triggered the callback
288 * @time: The time it was triggered
289 * @id: The #GstClockID that expired
290 * @user_data: user data passed in the gst_clock_id_wait_async() function
291 *
292 * The function prototype of the callback.
293 *
294 * Returns: %TRUE or %FALSE (currently unused)
295 */
296typedef gboolean (*GstClockCallback) (GstClock *clock, GstClockTime time,
297 GstClockID id, gpointer user_data);
298/**
299 * GstClockReturn:
300 * @GST_CLOCK_OK: The operation succeeded.
301 * @GST_CLOCK_EARLY: The operation was scheduled too late.
302 * @GST_CLOCK_UNSCHEDULED: The clockID was unscheduled
303 * @GST_CLOCK_BUSY: The ClockID is busy
304 * @GST_CLOCK_BADTIME: A bad time was provided to a function.
305 * @GST_CLOCK_ERROR: An error occurred
306 * @GST_CLOCK_UNSUPPORTED: Operation is not supported
307 * @GST_CLOCK_DONE: The ClockID is done waiting
308 *
309 * The return value of a clock operation.
310 */
311typedef enum
312{
313 GST_CLOCK_OK = 0,
314 GST_CLOCK_EARLY = 1,
315 GST_CLOCK_UNSCHEDULED = 2,
316 GST_CLOCK_BUSY = 3,
317 GST_CLOCK_BADTIME = 4,
318 GST_CLOCK_ERROR = 5,
319 GST_CLOCK_UNSUPPORTED = 6,
320 GST_CLOCK_DONE = 7
321} GstClockReturn;
322
323/**
324 * GstClockEntryType:
325 * @GST_CLOCK_ENTRY_SINGLE: a single shot timeout
326 * @GST_CLOCK_ENTRY_PERIODIC: a periodic timeout request
327 *
328 * The type of the clock entry
329 */
330typedef enum {
331 GST_CLOCK_ENTRY_SINGLE,
332 GST_CLOCK_ENTRY_PERIODIC
333} GstClockEntryType;
334
335/**
336 * GST_CLOCK_ENTRY:
337 * @entry: the entry to cast
338 *
339 * Cast to a clock entry
340 */
341#define GST_CLOCK_ENTRY(entry) ((GstClockEntry *)(entry))
342
343#ifndef GST_DISABLE_DEPRECATED
344/**
345 * GST_CLOCK_ENTRY_CLOCK:
346 * @entry: the entry to query
347 *
348 * Get the owner clock of the entry
349 *
350 * Deprecated: Use gst_clock_id_get_clock() instead.
351 */
352#define GST_CLOCK_ENTRY_CLOCK(entry) ((entry)->clock)
353#endif
354/**
355 * GST_CLOCK_ENTRY_TYPE:
356 * @entry: the entry to query
357 *
358 * Get the type of the clock entry
359 */
360#define GST_CLOCK_ENTRY_TYPE(entry) ((entry)->type)
361/**
362 * GST_CLOCK_ENTRY_TIME:
363 * @entry: the entry to query
364 *
365 * Get the requested time of this entry
366 */
367#define GST_CLOCK_ENTRY_TIME(entry) ((entry)->time)
368/**
369 * GST_CLOCK_ENTRY_INTERVAL:
370 * @entry: the entry to query
371 *
372 * Get the interval of this periodic entry
373 */
374#define GST_CLOCK_ENTRY_INTERVAL(entry) ((entry)->interval)
375/**
376 * GST_CLOCK_ENTRY_STATUS:
377 * @entry: the entry to query
378 *
379 * The status of the entry
380 */
381#define GST_CLOCK_ENTRY_STATUS(entry) ((entry)->status)
382
383/**
384 * GstClockEntry:
385 * @refcount: reference counter (read-only)
386 *
387 * All pending timeouts or periodic notifies are converted into
388 * an entry.
389 * Note that GstClockEntry should be treated as an opaque structure. It must
390 * not be extended or allocated using a custom allocator.
391 */
392struct _GstClockEntry {
393 gint refcount;
394 /*< protected >*/
395#ifndef GST_REMOVE_DEPRECATED
396#ifndef GST_DISABLE_DEPRECATED
397 GstClock *clock;
398#else
399 gpointer _clock;
400#endif
401#endif
402 GstClockEntryType type;
403 GstClockTime time;
404 GstClockTime interval;
405 GstClockReturn status;
406 GstClockCallback func;
407 gpointer user_data;
408 GDestroyNotify destroy_data;
409 gboolean unscheduled;
410 gboolean woken_up;
411
412 /*< private >*/
413 gpointer _gst_reserved[GST_PADDING];
414};
415
416#include <gst/gstobject.h>
417
418/**
419 * GstClockFlags:
420 * @GST_CLOCK_FLAG_CAN_DO_SINGLE_SYNC: clock can do a single sync timeout request
421 * @GST_CLOCK_FLAG_CAN_DO_SINGLE_ASYNC: clock can do a single async timeout request
422 * @GST_CLOCK_FLAG_CAN_DO_PERIODIC_SYNC: clock can do sync periodic timeout requests
423 * @GST_CLOCK_FLAG_CAN_DO_PERIODIC_ASYNC: clock can do async periodic timeout callbacks
424 * @GST_CLOCK_FLAG_CAN_SET_RESOLUTION: clock's resolution can be changed
425 * @GST_CLOCK_FLAG_CAN_SET_MASTER: clock can be slaved to a master clock
426 * @GST_CLOCK_FLAG_NEEDS_STARTUP_SYNC: clock needs to be synced before it can be used
427 * (Since 1.6)
428 * @GST_CLOCK_FLAG_LAST: subclasses can add additional flags starting from this flag
429 *
430 * The capabilities of this clock
431 */
432typedef enum {
433 GST_CLOCK_FLAG_CAN_DO_SINGLE_SYNC = (GST_OBJECT_FLAG_LAST << 0),
434 GST_CLOCK_FLAG_CAN_DO_SINGLE_ASYNC = (GST_OBJECT_FLAG_LAST << 1),
435 GST_CLOCK_FLAG_CAN_DO_PERIODIC_SYNC = (GST_OBJECT_FLAG_LAST << 2),
436 GST_CLOCK_FLAG_CAN_DO_PERIODIC_ASYNC = (GST_OBJECT_FLAG_LAST << 3),
437 GST_CLOCK_FLAG_CAN_SET_RESOLUTION = (GST_OBJECT_FLAG_LAST << 4),
438 GST_CLOCK_FLAG_CAN_SET_MASTER = (GST_OBJECT_FLAG_LAST << 5),
439 GST_CLOCK_FLAG_NEEDS_STARTUP_SYNC = (GST_OBJECT_FLAG_LAST << 6),
440 /* padding */
441 GST_CLOCK_FLAG_LAST = (GST_OBJECT_FLAG_LAST << 8)
442} GstClockFlags;
443
444/**
445 * GST_CLOCK_FLAGS:
446 * @clock: the clock to query
447 *
448 * Gets the #GstClockFlags clock flags.
449 */
450#define GST_CLOCK_FLAGS(clock) GST_OBJECT_FLAGS(clock)
451
452/**
453 * GstClock:
454 *
455 * #GstClock base structure. The values of this structure are
456 * protected for subclasses, use the methods to use the #GstClock.
457 */
458struct _GstClock {
459 GstObject object;
460
461 /*< private >*/
462 GstClockPrivate *priv;
463
464 gpointer _gst_reserved[GST_PADDING];
465};
466
467/**
468 * GstClockClass:
469 * @parent_class: the parent class structure
470 * @change_resolution: change the resolution of the clock. Not all values might
471 * be acceptable. The new resolution should be returned.
472 * @get_resolution: get the resolution of the clock.
473 * @get_internal_time: get the internal unadjusted time of the clock.
474 * implement @wait_jitter instead.
475 * @wait: perform a blocking wait on the given #GstClockEntry and return
476 * the jitter.
477 * @wait_async: perform an asynchronous wait for the given #GstClockEntry.
478 * @unschedule: unblock a blocking or async wait operation.
479 *
480 * GStreamer clock class. Override the vmethods to implement the clock
481 * functionality.
482 */
483struct _GstClockClass {
484 GstObjectClass parent_class;
485
486 /*< public >*/
487 /* vtable */
488 GstClockTime (*change_resolution) (GstClock *clock,
489 GstClockTime old_resolution,
490 GstClockTime new_resolution);
491 GstClockTime (*get_resolution) (GstClock *clock);
492
493 GstClockTime (*get_internal_time) (GstClock *clock);
494
495 /* waiting on an ID */
496 GstClockReturn (*wait) (GstClock *clock, GstClockEntry *entry,
497 GstClockTimeDiff *jitter);
498 GstClockReturn (*wait_async) (GstClock *clock, GstClockEntry *entry);
499 void (*unschedule) (GstClock *clock, GstClockEntry *entry);
500
501 /*< private >*/
502 gpointer _gst_reserved[GST_PADDING];
503};
504
505GST_API
506GType gst_clock_get_type (void);
507
508GST_API
509GstClockTime gst_clock_set_resolution (GstClock *clock,
510 GstClockTime resolution);
511GST_API
512GstClockTime gst_clock_get_resolution (GstClock *clock);
513
514GST_API
515GstClockTime gst_clock_get_time (GstClock *clock);
516
517GST_API
518void gst_clock_set_calibration (GstClock *clock, GstClockTime internal,
519 GstClockTime external,
520 GstClockTime rate_num,
521 GstClockTime rate_denom);
522GST_API
523void gst_clock_get_calibration (GstClock *clock, GstClockTime *internal,
524 GstClockTime *external,
525 GstClockTime *rate_num,
526 GstClockTime *rate_denom);
527
528/* master/slave clocks */
529
530GST_API
531gboolean gst_clock_set_master (GstClock *clock, GstClock *master);
532
533GST_API
534GstClock* gst_clock_get_master (GstClock *clock);
535
536GST_API
537void gst_clock_set_timeout (GstClock *clock,
538 GstClockTime timeout);
539GST_API
540GstClockTime gst_clock_get_timeout (GstClock *clock);
541
542GST_API
543gboolean gst_clock_add_observation (GstClock *clock, GstClockTime slave,
544 GstClockTime master, gdouble *r_squared);
545GST_API
546gboolean gst_clock_add_observation_unapplied (GstClock *clock, GstClockTime slave,
547 GstClockTime master, gdouble *r_squared,
548 GstClockTime *internal,
549 GstClockTime *external,
550 GstClockTime *rate_num,
551 GstClockTime *rate_denom);
552
553/* getting and adjusting internal/external time */
554
555GST_API
556GstClockTime gst_clock_get_internal_time (GstClock *clock);
557
558GST_API
559GstClockTime gst_clock_adjust_unlocked (GstClock *clock, GstClockTime internal);
560
561GST_API
562GstClockTime gst_clock_adjust_with_calibration (GstClock *clock,
563 GstClockTime internal_target,
564 GstClockTime cinternal,
565 GstClockTime cexternal,
566 GstClockTime cnum,
567 GstClockTime cdenom);
568GST_API
569GstClockTime gst_clock_unadjust_with_calibration (GstClock *clock,
570 GstClockTime external_target,
571 GstClockTime cinternal,
572 GstClockTime cexternal,
573 GstClockTime cnum,
574 GstClockTime cdenom);
575GST_API
576GstClockTime gst_clock_unadjust_unlocked (GstClock * clock, GstClockTime external);
577
578/* waiting for, signalling and checking for synchronization */
579
580GST_API
581gboolean gst_clock_wait_for_sync (GstClock * clock, GstClockTime timeout);
582
583GST_API
584gboolean gst_clock_is_synced (GstClock * clock);
585
586/* to be used by subclasses only */
587
588GST_API
589void gst_clock_set_synced (GstClock * clock, gboolean synced);
590
591/* creating IDs that can be used to get notifications */
592
593GST_API
594GstClockID gst_clock_new_single_shot_id (GstClock *clock,
595 GstClockTime time);
596GST_API
597GstClockID gst_clock_new_periodic_id (GstClock *clock,
598 GstClockTime start_time,
599 GstClockTime interval);
600
601/* reference counting */
602
603GST_API
604GstClockID gst_clock_id_ref (GstClockID id);
605
606GST_API
607void gst_clock_id_unref (GstClockID id);
608
609/* operations on IDs */
610
611GST_API
612gint gst_clock_id_compare_func (gconstpointer id1, gconstpointer id2);
613
614GST_API
615GstClock * gst_clock_id_get_clock (GstClockID id);
616
617GST_API
618gboolean gst_clock_id_uses_clock (GstClockID id, GstClock * clock);
619
620GST_API
621GstClockTime gst_clock_id_get_time (GstClockID id);
622
623GST_API
624GstClockReturn gst_clock_id_wait (GstClockID id,
625 GstClockTimeDiff *jitter);
626GST_API
627GstClockReturn gst_clock_id_wait_async (GstClockID id,
628 GstClockCallback func,
629 gpointer user_data,
630 GDestroyNotify destroy_data);
631GST_API
632void gst_clock_id_unschedule (GstClockID id);
633
634GST_API
635gboolean gst_clock_single_shot_id_reinit (GstClock * clock,
636 GstClockID id,
637 GstClockTime time);
638GST_API
639gboolean gst_clock_periodic_id_reinit (GstClock * clock,
640 GstClockID id,
641 GstClockTime start_time,
642 GstClockTime interval);
643
644#ifdef G_DEFINE_AUTOPTR_CLEANUP_FUNC
645G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstClock, gst_object_unref)
646#endif
647
648G_END_DECLS
649
650#endif /* __GST_CLOCK_H__ */
651