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202 lines
6.7 KiB
C
202 lines
6.7 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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#include <gst/gstobject.h>
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G_BEGIN_DECLS
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/* --- standard type macros --- */
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#define GST_TYPE_CLOCK (gst_clock_get_type ())
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#define GST_CLOCK(clock) (G_TYPE_CHECK_INSTANCE_CAST ((clock), GST_TYPE_CLOCK, GstClock))
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#define GST_IS_CLOCK(clock) (G_TYPE_CHECK_INSTANCE_TYPE ((clock), GST_TYPE_CLOCK))
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#define GST_CLOCK_CLASS(cclass) (G_TYPE_CHECK_CLASS_CAST ((cclass), GST_TYPE_CLOCK, GstClockClass))
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#define GST_IS_CLOCK_CLASS(cclass) (G_TYPE_CHECK_CLASS_TYPE ((cclass), GST_TYPE_CLOCK))
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#define GST_CLOCK_GET_CLASS(clock) (G_TYPE_INSTANCE_GET_CLASS ((clock), GST_TYPE_CLOCK, GstClockClass))
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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 ((GstClockTime)-1)
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#define GST_CLOCK_TIME_IS_VALID(time) ((time) != GST_CLOCK_TIME_NONE)
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#define GST_SECOND ((guint64) G_USEC_PER_SEC * G_GINT64_CONSTANT (1000))
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#define GST_MSECOND ((guint64) GST_SECOND / G_GINT64_CONSTANT (1000))
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#define GST_USECOND ((guint64) GST_SECOND / G_GINT64_CONSTANT (1000000))
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#define GST_NSECOND ((guint64) GST_SECOND / G_GINT64_CONSTANT (1000000000))
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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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#define GST_CLOCK_ENTRY_TRACE_NAME "GstClockEntry"
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typedef struct _GstClockEntry GstClockEntry;
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typedef struct _GstClock GstClock;
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typedef struct _GstClockClass GstClockClass;
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/* --- prototype for async callbacks --- */
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typedef gboolean (*GstClockCallback) (GstClock *clock, GstClockTime time,
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GstClockID id, gpointer user_data);
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typedef enum {
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/* --- protected --- */
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GST_CLOCK_ENTRY_OK,
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GST_CLOCK_ENTRY_EARLY,
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GST_CLOCK_ENTRY_RESTART
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} GstClockEntryStatus;
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typedef enum {
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/* --- protected --- */
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GST_CLOCK_ENTRY_SINGLE,
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GST_CLOCK_ENTRY_PERIODIC
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} GstClockEntryType;
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#define GST_CLOCK_ENTRY(entry) ((GstClockEntry *)(entry))
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#define GST_CLOCK_ENTRY_CLOCK(entry) ((entry)->clock)
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#define GST_CLOCK_ENTRY_TYPE(entry) ((entry)->type)
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#define GST_CLOCK_ENTRY_TIME(entry) ((entry)->time)
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#define GST_CLOCK_ENTRY_INTERVAL(entry) ((entry)->interval)
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#define GST_CLOCK_ENTRY_STATUS(entry) ((entry)->status)
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struct _GstClockEntry {
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/* --- protected --- */
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GstClock *clock;
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GstClockEntryType type;
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GstClockTime time;
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GstClockTime interval;
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GstClockEntryStatus status;
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GstClockCallback func;
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gpointer user_data;
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};
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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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GST_CLOCK_UNSUPPORTED = 4
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} GstClockReturn;
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typedef enum
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{
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GST_CLOCK_FLAG_CAN_DO_SINGLE_SYNC = (1 << 1),
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GST_CLOCK_FLAG_CAN_DO_SINGLE_ASYNC = (1 << 2),
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GST_CLOCK_FLAG_CAN_DO_PERIODIC_SYNC = (1 << 3),
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GST_CLOCK_FLAG_CAN_DO_PERIODIC_ASYNC = (1 << 4),
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GST_CLOCK_FLAG_CAN_SET_RESOLUTION = (1 << 5),
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GST_CLOCK_FLAG_CAN_SET_SPEED = (1 << 6)
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} GstClockFlags;
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#define GST_CLOCK_FLAGS(clock) (GST_CLOCK(clock)->flags)
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struct _GstClock {
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GstObject object;
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GstClockFlags flags;
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/* --- protected --- */
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GstClockTime start_time;
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GstClockTime last_time;
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gint64 max_diff;
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/* --- private --- */
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gboolean accept_discont;
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gdouble speed;
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guint64 resolution;
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gboolean active;
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GList *entries;
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GMutex *active_mutex;
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GCond *active_cond;
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gboolean stats;
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GST_OBJECT_PADDING
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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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gdouble (*change_speed) (GstClock *clock,
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gdouble oldspeed, gdouble newspeed);
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gdouble (*get_speed) (GstClock *clock);
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guint64 (*change_resolution) (GstClock *clock, guint64 old_resolution,
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guint64 new_resolution);
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guint64 (*get_resolution) (GstClock *clock);
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GstClockTime (*get_internal_time) (GstClock *clock);
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/* waiting on an ID */
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GstClockEntryStatus (*wait) (GstClock *clock, GstClockEntry *entry);
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GstClockEntryStatus (*wait_async) (GstClock *clock, GstClockEntry *entry);
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void (*unschedule) (GstClock *clock, GstClockEntry *entry);
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void (*unlock) (GstClock *clock, GstClockEntry *entry);
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GST_CLASS_PADDING
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};
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GType gst_clock_get_type (void);
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gdouble gst_clock_set_speed (GstClock *clock, gdouble speed);
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gdouble gst_clock_get_speed (GstClock *clock);
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guint64 gst_clock_set_resolution (GstClock *clock, guint64 resolution);
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guint64 gst_clock_get_resolution (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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GstClockTime gst_clock_get_time (GstClock *clock);
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GstClockID gst_clock_get_next_id (GstClock *clock);
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/* creating IDs that can be used to get notifications */
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GstClockID gst_clock_new_single_shot_id (GstClock *clock,
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GstClockTime time);
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GstClockID gst_clock_new_periodic_id (GstClock *clock,
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GstClockTime start_time,
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GstClockTime interval);
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/* operations on IDs */
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GstClockTime gst_clock_id_get_time (GstClockID id);
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GstClockReturn gst_clock_id_wait (GstClockID id,
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GstClockTimeDiff *jitter);
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GstClockReturn gst_clock_id_wait_async (GstClockID id,
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GstClockCallback func,
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gpointer user_data);
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void gst_clock_id_unschedule (GstClockID id);
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void gst_clock_id_unlock (GstClockID id);
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void gst_clock_id_free (GstClockID id);
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G_END_DECLS
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#endif /* __GST_CLOCK_H__ */
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