| /* 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__ |
| |
| 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 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) |
| |
| /* FIXME: still need to explicitly force types on the defines below */ |
| /** |
| * GST_SECOND: (value 1000000000) (type GstClockTime) |
| * |
| * Constant that defines one GStreamer second. |
| */ |
| #define GST_SECOND (G_USEC_PER_SEC * G_GINT64_CONSTANT (1000)) |
| /** |
| * GST_MSECOND: (value 1000000) (type GstClockTime) |
| * |
| * Constant that defines one GStreamer millisecond. |
| */ |
| #define GST_MSECOND (GST_SECOND / G_GINT64_CONSTANT (1000)) |
| /** |
| * GST_USECOND: (value 1000) (type GstClockTime) |
| * |
| * Constant that defines one GStreamer microsecond. |
| */ |
| #define GST_USECOND (GST_SECOND / G_GINT64_CONSTANT (1000000)) |
| /** |
| * GST_NSECOND: (value 1) (type GstClockTime) |
| * |
| * Constant that defines one GStreamer nanosecond |
| */ |
| #define GST_NSECOND (GST_SECOND / G_GINT64_CONSTANT (1000000000)) |
| |
| |
| /** |
| * GST_TIME_AS_SECONDS: |
| * @time: the time |
| * |
| * Convert a #GstClockTime to seconds. |
| */ |
| #define GST_TIME_AS_SECONDS(time) ((time) / GST_SECOND) |
| /** |
| * GST_TIME_AS_MSECONDS: |
| * @time: the time |
| * |
| * Convert 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 |
| * |
| * Convert 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 |
| * |
| * Convert 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 |
| * |
| * Calculate 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 |
| * |
| * Convert 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 |
| * |
| * Convert a #GstClockTime to a #GTimeVal |
| * |
| * <note>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.</note> |
| */ |
| #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 |
| * |
| * Convert 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 |
| * |
| * Convert 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: |
| * |
| * 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: |
| * |[ |
| * printf("%" GST_TIME_FORMAT "\n", GST_TIME_ARGS(ts)); |
| * ]| |
| */ |
| #define GST_TIME_FORMAT "u:%02u:%02u.%09u" |
| /** |
| * GST_TIME_ARGS: |
| * @t: a #GstClockTime |
| * |
| * Format @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: |
| * |
| * 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: |
| * |[ |
| * printf("%" GST_STIME_FORMAT "\n", GST_STIME_ARGS(ts)); |
| * ]| |
| * |
| * Since: 1.6 |
| */ |
| #define GST_STIME_FORMAT "c%" GST_TIME_FORMAT |
| /** |
| * GST_STIME_ARGS: |
| * @t: a #GstClockTimeDiff or #gint64 |
| * |
| * Format @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) >= 0) ? ' ' : '-', GST_TIME_ARGS (ABS (t)) |
| |
| 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 |
| * |
| * Cast to a clock entry |
| */ |
| #define GST_CLOCK_ENTRY(entry) ((GstClockEntry *)(entry)) |
| /** |
| * GST_CLOCK_ENTRY_CLOCK: |
| * @entry: the entry to query |
| * |
| * Get the owner clock of the entry |
| */ |
| #define GST_CLOCK_ENTRY_CLOCK(entry) ((entry)->clock) |
| /** |
| * GST_CLOCK_ENTRY_TYPE: |
| * @entry: the entry to query |
| * |
| * Get the type of the clock entry |
| */ |
| #define GST_CLOCK_ENTRY_TYPE(entry) ((entry)->type) |
| /** |
| * GST_CLOCK_ENTRY_TIME: |
| * @entry: the entry to query |
| * |
| * Get the requested time of this entry |
| */ |
| #define GST_CLOCK_ENTRY_TIME(entry) ((entry)->time) |
| /** |
| * GST_CLOCK_ENTRY_INTERVAL: |
| * @entry: the entry to query |
| * |
| * Get 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; |
| /*< protected >*/ |
| GstClock *clock; |
| 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_NEEDS_STARTUP_SYNC: clock needs to be synced before it can be used |
| * (Since 1.6) |
| * @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 = (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: |
| * |
| * #GstClock base structure. The values of this structure are |
| * protected for subclasses, use the methods to use the #GstClock. |
| */ |
| struct _GstClock { |
| GstObject object; |
| |
| /*< private >*/ |
| GstClockPrivate *priv; |
| |
| gpointer _gst_reserved[GST_PADDING]; |
| }; |
| |
| /** |
| * GstClockClass: |
| * @parent_class: the parent class structure |
| * @change_resolution: change the resolution of the clock. Not all values might |
| * be acceptable. The new resolution should be returned. |
| * @get_resolution: get the resolution of the clock. |
| * @get_internal_time: get the internal unadjusted time of the clock. |
| * implement @wait_jitter instead. |
| * @wait: perform a blocking wait on the given #GstClockEntry and return |
| * the jitter. |
| * @wait_async: perform an asynchronous wait for the given #GstClockEntry. |
| * @unschedule: unblock a blocking or async wait operation. |
| * |
| * GStreamer clock class. Override the vmethods to implement the clock |
| * functionality. |
| */ |
| struct _GstClockClass { |
| GstObjectClass parent_class; |
| |
| /*< public >*/ |
| /* vtable */ |
| GstClockTime (*change_resolution) (GstClock *clock, |
| GstClockTime old_resolution, |
| GstClockTime new_resolution); |
| GstClockTime (*get_resolution) (GstClock *clock); |
| |
| GstClockTime (*get_internal_time) (GstClock *clock); |
| |
| /* waiting on an ID */ |
| GstClockReturn (*wait) (GstClock *clock, GstClockEntry *entry, |
| GstClockTimeDiff *jitter); |
| GstClockReturn (*wait_async) (GstClock *clock, GstClockEntry *entry); |
| void (*unschedule) (GstClock *clock, GstClockEntry *entry); |
| |
| /*< private >*/ |
| gpointer _gst_reserved[GST_PADDING]; |
| }; |
| |
| GType gst_clock_get_type (void); |
| |
| GstClockTime gst_clock_set_resolution (GstClock *clock, |
| GstClockTime resolution); |
| GstClockTime gst_clock_get_resolution (GstClock *clock); |
| |
| GstClockTime gst_clock_get_time (GstClock *clock); |
| void gst_clock_set_calibration (GstClock *clock, GstClockTime internal, |
| GstClockTime external, |
| GstClockTime rate_num, |
| GstClockTime rate_denom); |
| void gst_clock_get_calibration (GstClock *clock, GstClockTime *internal, |
| GstClockTime *external, |
| GstClockTime *rate_num, |
| GstClockTime *rate_denom); |
| |
| /* master/slave clocks */ |
| gboolean gst_clock_set_master (GstClock *clock, GstClock *master); |
| GstClock* gst_clock_get_master (GstClock *clock); |
| |
| void gst_clock_set_timeout (GstClock *clock, |
| GstClockTime timeout); |
| GstClockTime gst_clock_get_timeout (GstClock *clock); |
| |
| gboolean gst_clock_add_observation (GstClock *clock, GstClockTime slave, |
| GstClockTime master, gdouble *r_squared); |
| |
| 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 */ |
| GstClockTime gst_clock_get_internal_time (GstClock *clock); |
| GstClockTime gst_clock_adjust_unlocked (GstClock *clock, GstClockTime internal); |
| GstClockTime gst_clock_adjust_with_calibration (GstClock *clock, |
| GstClockTime internal_target, |
| GstClockTime cinternal, |
| GstClockTime cexternal, |
| GstClockTime cnum, |
| GstClockTime cdenom); |
| GstClockTime gst_clock_unadjust_unlocked (GstClock * clock, GstClockTime external); |
| |
| /* waiting for, signalling and checking for synchronization */ |
| gboolean gst_clock_wait_for_sync (GstClock * clock, GstClockTime timeout); |
| gboolean gst_clock_is_synced (GstClock * clock); |
| |
| /* to be used by subclasses only */ |
| void gst_clock_set_synced (GstClock * clock, gboolean synced); |
| |
| /* creating IDs that can be used to get notifications */ |
| GstClockID gst_clock_new_single_shot_id (GstClock *clock, |
| GstClockTime time); |
| GstClockID gst_clock_new_periodic_id (GstClock *clock, |
| GstClockTime start_time, |
| GstClockTime interval); |
| |
| /* reference counting */ |
| GstClockID gst_clock_id_ref (GstClockID id); |
| void gst_clock_id_unref (GstClockID id); |
| |
| /* operations on IDs */ |
| gint gst_clock_id_compare_func (gconstpointer id1, gconstpointer id2); |
| |
| GstClockTime gst_clock_id_get_time (GstClockID id); |
| GstClockReturn gst_clock_id_wait (GstClockID id, |
| GstClockTimeDiff *jitter); |
| GstClockReturn gst_clock_id_wait_async (GstClockID id, |
| GstClockCallback func, |
| gpointer user_data, |
| GDestroyNotify destroy_data); |
| void gst_clock_id_unschedule (GstClockID id); |
| |
| gboolean gst_clock_single_shot_id_reinit (GstClock * clock, |
| GstClockID id, |
| GstClockTime time); |
| gboolean gst_clock_periodic_id_reinit (GstClock * clock, |
| GstClockID id, |
| GstClockTime start_time, |
| GstClockTime interval); |
| |
| G_END_DECLS |
| |
| #endif /* __GST_CLOCK_H__ */ |