gstreamer/gst/gstclock.h
Wim Taymans 74ca793b0a Clock fixes. Added async callbacks and clock unscheduling.
Original commit message from CVS:
Clock fixes. Added async callbacks and clock unscheduling.
Threading fixes. Fixed race condition in GstTask and possible
deadlock in _pad_get_caps(). Made various subsystems (query,
format,..) threadsafe.
Lots of cleanups and documentation.
2005-01-06 18:17:12 +00:00

208 lines
7 KiB
C

/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_CLOCK_H__
#define __GST_CLOCK_H__
#include <gst/gstobject.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))
typedef guint64 GstClockTime;
typedef gint64 GstClockTimeDiff;
typedef gpointer GstClockID;
#define GST_CLOCK_TIME_NONE ((GstClockTime)-1)
#define GST_CLOCK_TIME_IS_VALID(time) ((time) != GST_CLOCK_TIME_NONE)
#define GST_SECOND (G_USEC_PER_SEC * G_GINT64_CONSTANT (1000))
#define GST_MSECOND (GST_SECOND / G_GINT64_CONSTANT (1000))
#define GST_USECOND (GST_SECOND / G_GINT64_CONSTANT (1000000))
#define GST_NSECOND (GST_SECOND / G_GINT64_CONSTANT (1000000000))
#define GST_CLOCK_DIFF(s, e) (GstClockTimeDiff)((s) - (e))
#define GST_TIMEVAL_TO_TIME(tv) ((tv).tv_sec * GST_SECOND + (tv).tv_usec * GST_USECOND)
#define GST_TIME_TO_TIMEVAL(t,tv) \
G_STMT_START { \
(tv).tv_sec = (t) / GST_SECOND; \
(tv).tv_usec = ((t) - (tv).tv_sec * GST_SECOND) / GST_USECOND; \
} G_STMT_END
#define GST_TIMESPEC_TO_TIME(ts) ((ts).tv_sec * GST_SECOND + (ts).tv_nsec * GST_NSECOND)
#define GST_TIME_TO_TIMESPEC(t,ts) \
G_STMT_START { \
(ts).tv_sec = (t) / GST_SECOND; \
(ts).tv_usec = ((t) - (ts).tv_sec * GST_SECOND) / GST_NSECOND; \
} G_STMT_END
/* timestamp debugging macros */
#define GST_TIME_FORMAT "u:%02u:%02u.%09u"
#define GST_TIME_ARGS(t) \
(guint) ((t) / (GST_SECOND * 60 * 60)), \
(guint) (((t) / (GST_SECOND * 60)) % 60), \
(guint) (((t) / GST_SECOND) % 60), \
(guint) ((t) % GST_SECOND)
#define GST_CLOCK_ENTRY_TRACE_NAME "GstClockEntry"
typedef struct _GstClockEntry GstClockEntry;
typedef struct _GstClock GstClock;
typedef struct _GstClockClass GstClockClass;
/* --- prototype for async callbacks --- */
typedef gboolean (*GstClockCallback) (GstClock *clock, GstClockTime time,
GstClockID id, gpointer user_data);
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,
} GstClockReturn;
typedef enum {
GST_CLOCK_ENTRY_SINGLE,
GST_CLOCK_ENTRY_PERIODIC
} GstClockEntryType;
#define GST_CLOCK_ENTRY(entry) ((GstClockEntry *)(entry))
#define GST_CLOCK_ENTRY_CLOCK(entry) ((entry)->clock)
#define GST_CLOCK_ENTRY_TYPE(entry) ((entry)->type)
#define GST_CLOCK_ENTRY_TIME(entry) ((entry)->time)
#define GST_CLOCK_ENTRY_INTERVAL(entry) ((entry)->interval)
#define GST_CLOCK_ENTRY_STATUS(entry) ((entry)->status)
struct _GstClockEntry {
GstAtomicInt refcount;
/*< protected >*/
GstClock *clock;
GstClockEntryType type;
GstClockTime time;
GstClockTime interval;
GstClockReturn status;
GstClockCallback func;
gpointer user_data;
};
typedef enum
{
GST_CLOCK_FLAG_CAN_DO_SINGLE_SYNC = (1 << 1),
GST_CLOCK_FLAG_CAN_DO_SINGLE_ASYNC = (1 << 2),
GST_CLOCK_FLAG_CAN_DO_PERIODIC_SYNC = (1 << 3),
GST_CLOCK_FLAG_CAN_DO_PERIODIC_ASYNC = (1 << 4),
GST_CLOCK_FLAG_CAN_SET_RESOLUTION = (1 << 5),
} GstClockFlags;
#define GST_CLOCK_FLAGS(clock) (GST_CLOCK(clock)->flags)
#define GST_CLOCK_COND(clock) (GST_CLOCK_CAST(clock)->entries_changed)
#define GST_CLOCK_WAIT(clock) g_cond_wait(GST_CLOCK_COND(clock),GST_GET_LOCK(clock))
#define GST_CLOCK_TIMED_WAIT(clock,tv) g_cond_timed_wait(GST_CLOCK_COND(clock),GST_GET_LOCK(clock),tv)
#define GST_CLOCK_SIGNAL(clock) g_cond_broadcast(GST_CLOCK_COND(clock))
struct _GstClock {
GstObject object;
/*< public >*/
GstClockFlags flags;
/*< protected >*/ /* with LOCK */
GstClockTime adjust;
GstClockTime last_time;
GList *entries;
GCond *entries_changed;
/*< private >*/
guint64 resolution;
gboolean stats;
gpointer _gst_reserved[GST_PADDING];
};
struct _GstClockClass {
GstObjectClass parent_class;
/*< protected >*/
/* vtable */
guint64 (*change_resolution) (GstClock *clock, guint64 old_resolution,
guint64 new_resolution);
guint64 (*get_resolution) (GstClock *clock);
GstClockTime (*get_internal_time) (GstClock *clock);
/* waiting on an ID */
GstClockReturn (*wait) (GstClock *clock, GstClockEntry *entry);
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);
guint64 gst_clock_set_resolution (GstClock *clock, guint64 resolution);
guint64 gst_clock_get_resolution (GstClock *clock);
GstClockTime gst_clock_get_time (GstClock *clock);
void gst_clock_set_time_adjust (GstClock *clock, GstClockTime adjust);
/* 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);
void gst_clock_id_unschedule (GstClockID id);
G_END_DECLS
#endif /* __GST_CLOCK_H__ */