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138 lines
4.4 KiB
C
138 lines
4.4 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wtay@chello.be>
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*
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* gstclock.h: Header for clock subsystem
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_CLOCK_H__
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#define __GST_CLOCK_H__
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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#include <gst/gstobject.h>
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#define GST_TYPE_CLOCK \
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(gst_clock_get_type())
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#define GST_CLOCK(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CLOCK,GstClock))
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#define GST_CLOCK_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CLOCK,GstClockClass))
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#define GST_IS_CLOCK(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CLOCK))
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#define GST_IS_CLOCK_CLASS(obj) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CLOCK))
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typedef guint64 GstClockTime;
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typedef gint64 GstClockTimeDiff;
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typedef gpointer GstClockID;
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#define GST_CLOCK_TIME_NONE ((guint64)-1)
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#define GST_SECOND ((guint64)G_USEC_PER_SEC * 1000LL)
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#define GST_MSECOND ((guint64)GST_SECOND/1000LL)
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#define GST_USECOND ((guint64)GST_SECOND/1000000LL)
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#define GST_NSECOND ((guint64)GST_SECOND/1000000000LL)
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#define GST_CLOCK_DIFF(s, e) (GstClockTimeDiff)((s)-(e))
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#define GST_TIMEVAL_TO_TIME(tv) ((tv).tv_sec * GST_SECOND + (tv).tv_usec * GST_USECOND)
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#define GST_TIME_TO_TIMEVAL(t,tv) \
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G_STMT_START { \
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(tv).tv_sec = (t) / GST_SECOND; \
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(tv).tv_usec = ((t) / GST_USECOND) % GST_MSECOND; \
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} G_STMT_END
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typedef struct _GstClock GstClock;
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typedef struct _GstClockClass GstClockClass;
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typedef void (*GstClockCallback) (GstClock *clock, GstClockTime time, GstClockID id, gpointer user_data);
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typedef enum
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{
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GST_CLOCK_STOPPED = 0,
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GST_CLOCK_TIMEOUT = 1,
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GST_CLOCK_EARLY = 2,
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GST_CLOCK_ERROR = 3
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} GstClockReturn;
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struct _GstClock {
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GstObject object;
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GstClockTime start_time;
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GstClockTime last_time;
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gboolean accept_discont;
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gdouble speed;
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gboolean active;
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GList *entries;
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gboolean async_supported;
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GMutex *active_mutex;
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GCond *active_cond;
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};
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struct _GstClockClass {
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GstObjectClass parent_class;
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/* vtable */
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GstClockTime (*get_internal_time) (GstClock *clock);
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void (*set_resolution) (GstClock *clock, guint64 resolution);
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guint64 (*get_resolution) (GstClock *clock);
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/* signals */
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};
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GType gst_clock_get_type (void);
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void gst_clock_set_speed (GstClock *clock, gdouble speed);
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gdouble gst_clock_get_speed (GstClock *clock);
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void gst_clock_set_active (GstClock *clock, gboolean active);
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gboolean gst_clock_is_active (GstClock *clock);
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void gst_clock_reset (GstClock *clock);
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gboolean gst_clock_handle_discont (GstClock *clock, guint64 time);
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gboolean gst_clock_async_supported (GstClock *clock);
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GstClockTime gst_clock_get_time (GstClock *clock);
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GstClockReturn gst_clock_wait (GstClock *clock, GstClockTime time, GstClockTimeDiff *jitter);
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GstClockID gst_clock_wait_async (GstClock *clock, GstClockTime time,
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GstClockCallback func, gpointer user_data);
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void gst_clock_cancel_wait_async (GstClock *clock, GstClockID id);
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GstClockID gst_clock_notify_async (GstClock *clock, GstClockTime interval,
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GstClockCallback func, gpointer user_data);
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void gst_clock_remove_notify_async (GstClock *clock, GstClockID id);
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GstClockReturn gst_clock_wait_id (GstClock *clock, GstClockID id, GstClockTimeDiff *jitter);
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GstClockID gst_clock_get_next_id (GstClock *clock);
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void gst_clock_unlock_id (GstClock *clock, GstClockID id);
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GstClockTime gst_clock_id_get_time (GstClockID id);
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void gst_clock_set_resolution (GstClock *clock, guint64 resolution);
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guint64 gst_clock_get_resolution (GstClock *clock);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __GST_CLOCK_H__ */
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