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GST-Tensordecoder-ov_ep/subprojects/gstreamer/gst/gstclock.h

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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
* 2005 Wim Taymans <wim@fluendo.com>
*
* gstclock.h: Header for clock subsystem
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_CLOCK_H__
#define __GST_CLOCK_H__
#include <gst/gstconfig.h>
#include <glib.h>
G_BEGIN_DECLS
/* --- standard type macros --- */
#define GST_TYPE_CLOCK (gst_clock_get_type ())
#define GST_CLOCK(clock) (G_TYPE_CHECK_INSTANCE_CAST ((clock), GST_TYPE_CLOCK, GstClock))
#define GST_IS_CLOCK(clock) (G_TYPE_CHECK_INSTANCE_TYPE ((clock), GST_TYPE_CLOCK))
#define GST_CLOCK_CLASS(cclass) (G_TYPE_CHECK_CLASS_CAST ((cclass), GST_TYPE_CLOCK, GstClockClass))
#define GST_IS_CLOCK_CLASS(cclass) (G_TYPE_CHECK_CLASS_TYPE ((cclass), GST_TYPE_CLOCK))
#define GST_CLOCK_GET_CLASS(clock) (G_TYPE_INSTANCE_GET_CLASS ((clock), GST_TYPE_CLOCK, GstClockClass))
#define GST_CLOCK_CAST(clock) ((GstClock*)(clock))
/**
* GstClockTime:
*
* A datatype to hold a time, measured in nanoseconds.
*/
typedef guint64 GstClockTime;
/**
* GST_TYPE_CLOCK_TIME:
*
* The #GType of a #GstClockTime.
*/
#define GST_TYPE_CLOCK_TIME G_TYPE_UINT64
/**
* GstClockTimeDiff:
*
* A datatype to hold a time difference, measured in nanoseconds.
*/
typedef gint64 GstClockTimeDiff;
/**
* GstClockID:
*
* A datatype to hold the handle to an outstanding sync or async clock callback.
*/
typedef gpointer GstClockID;
/**
* GST_CLOCK_TIME_NONE: (value 18446744073709551615) (type GstClockTime)
*
* Constant to define an undefined clock time.
*/
#define GST_CLOCK_TIME_NONE ((GstClockTime) -1)
/**
* GST_CLOCK_TIME_IS_VALID:
* @time: clock time to validate
*
* Tests if a given #GstClockTime represents a valid defined time.
*/
#define GST_CLOCK_TIME_IS_VALID(time) (((GstClockTime)(time)) != GST_CLOCK_TIME_NONE)
/**
* GST_CLOCK_STIME_NONE: (value -9223372036854775808) (type GstClockTimeDiff)
*
* Constant to define an undefined clock time.
*/
#define GST_CLOCK_STIME_NONE ((GstClockTimeDiff)G_MININT64)
/**
* GST_CLOCK_STIME_IS_VALID:
* @time: signed clock time to validate
*
* Tests if a given #GstClockTimeDiff of #gint64 represents a valid defined time.
*
* Since: 1.6
*/
#define GST_CLOCK_STIME_IS_VALID(time) (((GstClockTimeDiff)(time)) != GST_CLOCK_STIME_NONE)
/**
* GST_SECOND: (value 1000000000) (type GstClockTimeDiff)
*
* Constant that defines one GStreamer second.
*/
#define GST_SECOND ((GstClockTimeDiff)(G_USEC_PER_SEC * G_GINT64_CONSTANT (1000)))
/**
* GST_MSECOND: (value 1000000) (type GstClockTimeDiff)
*
* Constant that defines one GStreamer millisecond.
*/
#define GST_MSECOND ((GstClockTimeDiff)(GST_SECOND / G_GINT64_CONSTANT (1000)))
/**
* GST_USECOND: (value 1000) (type GstClockTimeDiff)
*
* Constant that defines one GStreamer microsecond.
*/
#define GST_USECOND ((GstClockTimeDiff)(GST_SECOND / G_GINT64_CONSTANT (1000000)))
/**
* GST_NSECOND: (value 1) (type GstClockTimeDiff)
*
* Constant that defines one GStreamer nanosecond
*/
#define GST_NSECOND ((GstClockTimeDiff)(GST_SECOND / G_GINT64_CONSTANT (1000000000)))
/**
* GST_TIME_AS_SECONDS:
* @time: the time
*
* Converts a #GstClockTime to seconds.
*/
#define GST_TIME_AS_SECONDS(time) ((time) / GST_SECOND)
/**
* GST_TIME_AS_MSECONDS:
* @time: the time
*
* Converts a #GstClockTime to milliseconds (1/1000 of a second).
*/
#define GST_TIME_AS_MSECONDS(time) ((time) / G_GINT64_CONSTANT (1000000))
/**
* GST_TIME_AS_USECONDS:
* @time: the time
*
* Converts a #GstClockTime to microseconds (1/1000000 of a second).
*/
#define GST_TIME_AS_USECONDS(time) ((time) / G_GINT64_CONSTANT (1000))
/**
* GST_TIME_AS_NSECONDS:
* @time: the time
*
* Converts a #GstClockTime to nanoseconds (1/1000000000 of a second).
*/
#define GST_TIME_AS_NSECONDS(time) (time)
/**
* GST_CLOCK_DIFF:
* @s: the first time
* @e: the second time
*
* Calculates a difference between two clock times as a #GstClockTimeDiff.
* The difference is calculated as @e - @s.
*/
#define GST_CLOCK_DIFF(s, e) (GstClockTimeDiff)((e) - (s))
/**
* GST_TIMEVAL_TO_TIME:
* @tv: the timeval to convert
*
* Converts a GTimeVal to a #GstClockTime.
*/
#define GST_TIMEVAL_TO_TIME(tv) (GstClockTime)((tv).tv_sec * GST_SECOND + (tv).tv_usec * GST_USECOND)
/**
* GST_TIME_TO_TIMEVAL:
* @t: The #GstClockTime to convert
* @tv: The target timeval
*
* Converts a #GstClockTime to a GTimeVal
*
* > on 32-bit systems, a timeval has a range of only 2^32 - 1 seconds,
* > which is about 68 years. Expect trouble if you want to schedule stuff
* > in your pipeline for 2038.
*/
#define GST_TIME_TO_TIMEVAL(t,tv) \
G_STMT_START { \
g_assert ("Value of time " #t " is out of timeval's range" && \
((t) / GST_SECOND) < G_MAXLONG); \
(tv).tv_sec = (glong) (((GstClockTime) (t)) / GST_SECOND); \
(tv).tv_usec = (glong) ((((GstClockTime) (t)) - \
((GstClockTime) (tv).tv_sec) * GST_SECOND) \
/ GST_USECOND); \
} G_STMT_END
/**
* GST_TIMESPEC_TO_TIME:
* @ts: the timespec to convert
*
* Converts a struct timespec (see `man pselect`) to a #GstClockTime.
*/
#define GST_TIMESPEC_TO_TIME(ts) (GstClockTime)((ts).tv_sec * GST_SECOND + (ts).tv_nsec * GST_NSECOND)
/**
* GST_TIME_TO_TIMESPEC:
* @t: The #GstClockTime to convert
* @ts: The target timespec
*
* Converts a #GstClockTime to a struct timespec (see `man pselect`)
*/
#define GST_TIME_TO_TIMESPEC(t,ts) \
G_STMT_START { \
g_assert ("Value of time " #t " is out of timespec's range" && \
((t) / GST_SECOND) < G_MAXLONG); \
(ts).tv_sec = (glong) ((t) / GST_SECOND); \
(ts).tv_nsec = (glong) (((t) - (ts).tv_sec * GST_SECOND) / GST_NSECOND); \
} G_STMT_END
/* timestamp debugging macros */
/**
* GST_TIME_FORMAT: (skip):
*
* A string that can be used in printf-like format strings to display a
* #GstClockTime value in `h:m:s` format. Use GST_TIME_ARGS() to construct
* the matching arguments.
*
* Example:
*
* ``` C
* printf("%" GST_TIME_FORMAT "\n", GST_TIME_ARGS(ts));
* ```
*/
#define GST_TIME_FORMAT "u:%02u:%02u.%09u"
/**
* GST_TIME_ARGS: (skip):
* @t: a #GstClockTime
*
* Formats @t for the #GST_TIME_FORMAT format string. Note: @t will be
* evaluated more than once.
*/
#define GST_TIME_ARGS(t) \
GST_CLOCK_TIME_IS_VALID (t) ? \
(guint) (((GstClockTime)(t)) / (GST_SECOND * 60 * 60)) : 99, \
GST_CLOCK_TIME_IS_VALID (t) ? \
(guint) ((((GstClockTime)(t)) / (GST_SECOND * 60)) % 60) : 99, \
GST_CLOCK_TIME_IS_VALID (t) ? \
(guint) ((((GstClockTime)(t)) / GST_SECOND) % 60) : 99, \
GST_CLOCK_TIME_IS_VALID (t) ? \
(guint) (((GstClockTime)(t)) % GST_SECOND) : 999999999
/**
* GST_STIME_FORMAT: (skip):
*
* A string that can be used in printf-like format strings to display a signed
* #GstClockTimeDiff or #gint64 value in `h:m:s` format. Use GST_TIME_ARGS() to
* construct the matching arguments.
*
* Example:
*
* ``` C
* printf("%" GST_STIME_FORMAT "\n", GST_STIME_ARGS(ts));
* ```
*
* Since: 1.6
*/
#define GST_STIME_FORMAT "c%" GST_TIME_FORMAT
/**
* GST_STIME_ARGS: (skip):
* @t: a #GstClockTimeDiff or #gint64
*
* Formats @t for the #GST_STIME_FORMAT format string. Note: @t will be
* evaluated more than once.
*
* Since: 1.6
*/
#define GST_STIME_ARGS(t) \
((t) == GST_CLOCK_STIME_NONE || (t) >= 0) ? '+' : '-', \
GST_CLOCK_STIME_IS_VALID (t) ? \
(guint) (((GstClockTime)(ABS(t))) / (GST_SECOND * 60 * 60)) : 99, \
GST_CLOCK_STIME_IS_VALID (t) ? \
(guint) ((((GstClockTime)(ABS(t))) / (GST_SECOND * 60)) % 60) : 99, \
GST_CLOCK_STIME_IS_VALID (t) ? \
(guint) ((((GstClockTime)(ABS(t))) / GST_SECOND) % 60) : 99, \
GST_CLOCK_STIME_IS_VALID (t) ? \
(guint) (((GstClockTime)(ABS(t))) % GST_SECOND) : 999999999
typedef struct _GstClockEntry GstClockEntry;
typedef struct _GstClock GstClock;
typedef struct _GstClockClass GstClockClass;
typedef struct _GstClockPrivate GstClockPrivate;
/* --- prototype for async callbacks --- */
/**
* GstClockCallback:
* @clock: The clock that triggered the callback
* @time: The time it was triggered
* @id: The #GstClockID that expired
* @user_data: user data passed in the gst_clock_id_wait_async() function
*
* The function prototype of the callback.
*
* Returns: %TRUE or %FALSE (currently unused)
*/
typedef gboolean (*GstClockCallback) (GstClock *clock, GstClockTime time,
GstClockID id, gpointer user_data);
/**
* GstClockReturn:
* @GST_CLOCK_OK: The operation succeeded.
* @GST_CLOCK_EARLY: The operation was scheduled too late.
* @GST_CLOCK_UNSCHEDULED: The clockID was unscheduled
* @GST_CLOCK_BUSY: The ClockID is busy
* @GST_CLOCK_BADTIME: A bad time was provided to a function.
* @GST_CLOCK_ERROR: An error occurred
* @GST_CLOCK_UNSUPPORTED: Operation is not supported
* @GST_CLOCK_DONE: The ClockID is done waiting
*
* The return value of a clock operation.
*/
typedef enum
{
GST_CLOCK_OK = 0,
GST_CLOCK_EARLY = 1,
GST_CLOCK_UNSCHEDULED = 2,
GST_CLOCK_BUSY = 3,
GST_CLOCK_BADTIME = 4,
GST_CLOCK_ERROR = 5,
GST_CLOCK_UNSUPPORTED = 6,
GST_CLOCK_DONE = 7
} GstClockReturn;
/**
* GstClockEntryType:
* @GST_CLOCK_ENTRY_SINGLE: a single shot timeout
* @GST_CLOCK_ENTRY_PERIODIC: a periodic timeout request
*
* The type of the clock entry
*/
typedef enum {
GST_CLOCK_ENTRY_SINGLE,
GST_CLOCK_ENTRY_PERIODIC
} GstClockEntryType;
/**
* GST_CLOCK_ENTRY:
* @entry: the entry to cast
*
* Casts to a clock entry
*/
#define GST_CLOCK_ENTRY(entry) ((GstClockEntry *)(entry))
#ifndef GST_DISABLE_DEPRECATED
/**
* GST_CLOCK_ENTRY_CLOCK:
* @entry: the entry to query
*
* Gets the owner clock of the entry
*
* Deprecated: Use gst_clock_id_get_clock() instead.
*/
#define GST_CLOCK_ENTRY_CLOCK(entry) ((entry)->clock)
#endif
/**
* GST_CLOCK_ENTRY_TYPE:
* @entry: the entry to query
*
* Gets the type of the clock entry
*/
#define GST_CLOCK_ENTRY_TYPE(entry) ((entry)->type)
/**
* GST_CLOCK_ENTRY_TIME:
* @entry: the entry to query
*
* Gets the requested time of this entry
*/
#define GST_CLOCK_ENTRY_TIME(entry) ((entry)->time)
/**
* GST_CLOCK_ENTRY_INTERVAL:
* @entry: the entry to query
*
* Gets the interval of this periodic entry
*/
#define GST_CLOCK_ENTRY_INTERVAL(entry) ((entry)->interval)
/**
* GST_CLOCK_ENTRY_STATUS:
* @entry: the entry to query
*
* The status of the entry
*/
#define GST_CLOCK_ENTRY_STATUS(entry) ((entry)->status)
/**
* GstClockEntry:
* @refcount: reference counter (read-only)
*
* All pending timeouts or periodic notifies are converted into
* an entry.
* Note that GstClockEntry should be treated as an opaque structure. It must
* not be extended or allocated using a custom allocator.
*/
struct _GstClockEntry {
gint refcount;
/*< private >*/
#ifndef GST_REMOVE_DEPRECATED
#ifndef GST_DISABLE_DEPRECATED
GstClock *clock;
#else
gpointer _clock;
#endif
#endif
GstClockEntryType type;
GstClockTime time;
GstClockTime interval;
GstClockReturn status;
GstClockCallback func;
gpointer user_data;
GDestroyNotify destroy_data;
gboolean unscheduled;
gboolean woken_up;
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
#include <gst/gstobject.h>
/**
* GstClockFlags:
* @GST_CLOCK_FLAG_CAN_DO_SINGLE_SYNC: clock can do a single sync timeout request
* @GST_CLOCK_FLAG_CAN_DO_SINGLE_ASYNC: clock can do a single async timeout request
* @GST_CLOCK_FLAG_CAN_DO_PERIODIC_SYNC: clock can do sync periodic timeout requests
* @GST_CLOCK_FLAG_CAN_DO_PERIODIC_ASYNC: clock can do async periodic timeout callbacks
* @GST_CLOCK_FLAG_CAN_SET_RESOLUTION: clock's resolution can be changed
* @GST_CLOCK_FLAG_CAN_SET_MASTER: clock can be slaved to a master clock
* @GST_CLOCK_FLAG_LAST: subclasses can add additional flags starting from this flag
*
* The capabilities of this clock
*/
typedef enum {
GST_CLOCK_FLAG_CAN_DO_SINGLE_SYNC = (GST_OBJECT_FLAG_LAST << 0),
GST_CLOCK_FLAG_CAN_DO_SINGLE_ASYNC = (GST_OBJECT_FLAG_LAST << 1),
GST_CLOCK_FLAG_CAN_DO_PERIODIC_SYNC = (GST_OBJECT_FLAG_LAST << 2),
GST_CLOCK_FLAG_CAN_DO_PERIODIC_ASYNC = (GST_OBJECT_FLAG_LAST << 3),
GST_CLOCK_FLAG_CAN_SET_RESOLUTION = (GST_OBJECT_FLAG_LAST << 4),
GST_CLOCK_FLAG_CAN_SET_MASTER = (GST_OBJECT_FLAG_LAST << 5),
/**
* GST_CLOCK_FLAG_NEEDS_STARTUP_SYNC:
*
* clock needs to be synced before it can be used
*
* Since: 1.6
*/
GST_CLOCK_FLAG_NEEDS_STARTUP_SYNC = (GST_OBJECT_FLAG_LAST << 6),
/* padding */
GST_CLOCK_FLAG_LAST = (GST_OBJECT_FLAG_LAST << 8)
} GstClockFlags;
/**
* GST_CLOCK_FLAGS:
* @clock: the clock to query
*
* Gets the #GstClockFlags clock flags.
*/
#define GST_CLOCK_FLAGS(clock) GST_OBJECT_FLAGS(clock)
/**
* GstClock:
* @object: the parent structure
*
* #GstClock base structure.
*/
struct _GstClock {
GstObject object;
/*< private >*/
GstClockPrivate *priv;
gpointer _gst_reserved[GST_PADDING];
};
/**
* GstClockClass:
* @parent_class: the parent class structure
*
* GStreamer clock class. Override the vmethods to implement the clock
* functionality.
*/
struct _GstClockClass {
GstObjectClass parent_class;
/*< public >*/
/* vtable */
/**
* GstClockClass::change_resolution:
* @clock: the #GstClock
* @old_resolution: the previous resolution
* @new_resolution: the new resolution
*
* Change the resolution of the clock. Not all values might
* be acceptable.
*
* Returns: the new resolution
*/
GstClockTime (*change_resolution) (GstClock *clock,
GstClockTime old_resolution,
GstClockTime new_resolution);
/**
* GstClockClass::get_resolution:
* @clock: the #GstClock
*
* Get the resolution of the clock.
*
* Returns: the current resolution
*/
GstClockTime (*get_resolution) (GstClock *clock);
/**
* GstClockClass::get_internal_time:
* @clock: the #GstClock
*
* Get the internal unadjusted time of the clock.
*
* Implement #GstClockClass::wait instead.
*
* Returns: the internal time
*/
GstClockTime (*get_internal_time) (GstClock *clock);
/* waiting on an ID */
/**
* GstClockClass::wait:
* @clock: the #GstClock
* @entry: the entry to wait on
* @jitter: (out) (allow-none): a pointer that will contain the jitter
*
* Perform a blocking wait on the given #GstClockEntry and return
* the jitter.
*
* Returns: the result of the blocking wait. #GST_CLOCK_EARLY will be returned
* if the current clock time is past the time of @id, #GST_CLOCK_OK if
* @id was scheduled in time. #GST_CLOCK_UNSCHEDULED if @id was
* unscheduled with gst_clock_id_unschedule().
*/
GstClockReturn (*wait) (GstClock *clock, GstClockEntry *entry,
GstClockTimeDiff *jitter);
/**
* GstClockClass::wait_async:
* @clock: the #GstClock
* @entry: the entry to wait on
*
* Perform an asynchronous wait on the given #GstClockEntry.
*
* Returns: the result of the non blocking wait.
*/
GstClockReturn (*wait_async) (GstClock *clock, GstClockEntry *entry);
/**
* GstClockClass::unschedule:
* @clock: the #GstClock
* @entry: the entry to unschedule
*
* Unblock a blocking or async wait operation.
*/
void (*unschedule) (GstClock *clock, GstClockEntry *entry);
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
GST_API
GType gst_clock_get_type (void);
GST_API
GstClockTime gst_clock_set_resolution (GstClock *clock,
GstClockTime resolution);
GST_API
GstClockTime gst_clock_get_resolution (GstClock *clock);
GST_API
GstClockTime gst_clock_get_time (GstClock *clock);
GST_API
void gst_clock_set_calibration (GstClock *clock, GstClockTime internal,
GstClockTime external,
GstClockTime rate_num,
GstClockTime rate_denom);
GST_API
void gst_clock_get_calibration (GstClock *clock, GstClockTime *internal,
GstClockTime *external,
GstClockTime *rate_num,
GstClockTime *rate_denom);
/* master/slave clocks */
GST_API
gboolean gst_clock_set_master (GstClock *clock, GstClock *master);
GST_API
GstClock* gst_clock_get_master (GstClock *clock);
GST_API
void gst_clock_set_timeout (GstClock *clock,
GstClockTime timeout);
GST_API
GstClockTime gst_clock_get_timeout (GstClock *clock);
GST_API
gboolean gst_clock_add_observation (GstClock *clock, GstClockTime slave,
GstClockTime master, gdouble *r_squared);
GST_API
gboolean gst_clock_add_observation_unapplied (GstClock *clock, GstClockTime slave,
GstClockTime master, gdouble *r_squared,
GstClockTime *internal,
GstClockTime *external,
GstClockTime *rate_num,
GstClockTime *rate_denom);
/* getting and adjusting internal/external time */
GST_API
GstClockTime gst_clock_get_internal_time (GstClock *clock);
GST_API
GstClockTime gst_clock_adjust_unlocked (GstClock *clock, GstClockTime internal);
GST_API
GstClockTime gst_clock_adjust_with_calibration (GstClock *clock,
GstClockTime internal_target,
GstClockTime cinternal,
GstClockTime cexternal,
GstClockTime cnum,
GstClockTime cdenom);
GST_API
GstClockTime gst_clock_unadjust_with_calibration (GstClock *clock,
GstClockTime external_target,
GstClockTime cinternal,
GstClockTime cexternal,
GstClockTime cnum,
GstClockTime cdenom);
GST_API
GstClockTime gst_clock_unadjust_unlocked (GstClock * clock, GstClockTime external);
/* waiting for, signalling and checking for synchronization */
GST_API
gboolean gst_clock_wait_for_sync (GstClock * clock, GstClockTime timeout);
GST_API
gboolean gst_clock_is_synced (GstClock * clock);
/* to be used by subclasses only */
GST_API
void gst_clock_set_synced (GstClock * clock, gboolean synced);
/* creating IDs that can be used to get notifications */
GST_API
GstClockID gst_clock_new_single_shot_id (GstClock *clock,
GstClockTime time);
GST_API
GstClockID gst_clock_new_periodic_id (GstClock *clock,
GstClockTime start_time,
GstClockTime interval);
/* reference counting */
GST_API
GstClockID gst_clock_id_ref (GstClockID id);
GST_API
void gst_clock_id_unref (GstClockID id);
/* operations on IDs */
GST_API
gint gst_clock_id_compare_func (gconstpointer id1, gconstpointer id2);
GST_API
GstClock * gst_clock_id_get_clock (GstClockID id);
GST_API
gboolean gst_clock_id_uses_clock (GstClockID id, GstClock * clock);
GST_API
GstClockTime gst_clock_id_get_time (GstClockID id);
GST_API
GstClockReturn gst_clock_id_wait (GstClockID id,
GstClockTimeDiff *jitter);
GST_API
GstClockReturn gst_clock_id_wait_async (GstClockID id,
GstClockCallback func,
gpointer user_data,
GDestroyNotify destroy_data);
GST_API
void gst_clock_id_unschedule (GstClockID id);
GST_API
gboolean gst_clock_single_shot_id_reinit (GstClock * clock,
GstClockID id,
GstClockTime time);
GST_API
gboolean gst_clock_periodic_id_reinit (GstClock * clock,
GstClockID id,
GstClockTime start_time,
GstClockTime interval);
G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstClock, gst_object_unref)
G_DEFINE_AUTO_CLEANUP_FREE_FUNC(GstClockID, gst_clock_id_unref, 0)
G_END_DECLS
#endif /* __GST_CLOCK_H__ */
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