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>
*
* 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__
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#include <gst/gstobject.h>
#define GST_TYPE_CLOCK \
(gst_clock_get_type())
#define GST_CLOCK(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CLOCK,GstClock))
#define GST_CLOCK_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CLOCK,GstClockClass))
#define GST_IS_CLOCK(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CLOCK))
#define GST_IS_CLOCK_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CLOCK))
typedef guint64 GstClockTime;
typedef gint64 GstClockTimeDiff;
typedef gpointer GstClockID;
#define GST_SECOND ((guint64)G_USEC_PER_SEC)
#define GST_MSECOND ((guint64)GST_SECOND/1000LL)
#define GST_USECOND ((guint64)GST_SECOND/1000000LL)
#define GST_NSECOND ((guint64)GST_SECOND/1000000000LL)
#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) / GST_USECOND) % GST_SECOND; \
} G_STMT_END
typedef struct _GstClock GstClock;
typedef struct _GstClockClass GstClockClass;
typedef void (*GstClockCallback) (GstClock *clock, GstClockTime time, GstClockID id, gpointer user_data);
typedef enum
{
GST_CLOCK_STOPPED = 0,
GST_CLOCK_TIMEOUT = 1,
GST_CLOCK_EARLY = 2,
GST_CLOCK_ERROR = 3,
} GstClockReturn;
struct _GstClock {
GstObject object;
GstClockTime start_time;
GstClockTime last_time;
gboolean accept_discont;
gdouble speed;
gboolean active;
GList *entries;
gboolean async_supported;
GMutex *active_mutex;
GCond *active_cond;
};
struct _GstClockClass {
GstObjectClass parent_class;
/* vtable */
GstClockTime (*get_internal_time) (GstClock *clock);
void (*set_resolution) (GstClock *clock, guint64 resolution);
guint64 (*get_resolution) (GstClock *clock);
/* signals */
};
GType gst_clock_get_type (void);
void gst_clock_set_speed (GstClock *clock, gdouble speed);
gdouble gst_clock_get_speed (GstClock *clock);
void gst_clock_set_active (GstClock *clock, gboolean active);
gboolean gst_clock_is_active (GstClock *clock);
void gst_clock_reset (GstClock *clock);
gboolean gst_clock_handle_discont (GstClock *clock, guint64 time);
gboolean gst_clock_async_supported (GstClock *clock);
GstClockTime gst_clock_get_time (GstClock *clock);
GstClockReturn gst_clock_wait (GstClock *clock, GstClockTime time, GstClockTimeDiff *jitter);
GstClockID gst_clock_wait_async (GstClock *clock, GstClockTime time,
GstClockCallback func, gpointer user_data);
void gst_clock_cancel_wait_async (GstClock *clock, GstClockID id);
GstClockID gst_clock_notify_async (GstClock *clock, GstClockTime interval,
GstClockCallback func, gpointer user_data);
void gst_clock_remove_notify_async (GstClock *clock, GstClockID id);
GstClockReturn gst_clock_wait_id (GstClock *clock, GstClockID id, GstClockTimeDiff *jitter);
GstClockID gst_clock_get_next_id (GstClock *clock);
void gst_clock_unlock_id (GstClock *clock, GstClockID id);
GstClockTime gst_clock_id_get_time (GstClockID id);
void gst_clock_set_resolution (GstClock *clock, guint64 resolution);
guint64 gst_clock_get_resolution (GstClock *clock);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GST_CLOCK_H__ */