/* GStreamer * Copyright (C) 1999,2000 Erik Walthinsen * 2000 Wim Taymans * * 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 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)) 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 ((guint64) G_USEC_PER_SEC * G_GINT64_CONSTANT (1000)) #define GST_MSECOND ((guint64) GST_SECOND / G_GINT64_CONSTANT (1000)) #define GST_USECOND ((guint64) GST_SECOND / G_GINT64_CONSTANT (1000000)) #define GST_NSECOND ((guint64) 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) / GST_USECOND) % GST_MSECOND; \ } G_STMT_END #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 { /* --- protected --- */ GST_CLOCK_ENTRY_OK, GST_CLOCK_ENTRY_EARLY, GST_CLOCK_ENTRY_RESTART } GstClockEntryStatus; typedef enum { /* --- protected --- */ 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 { /* --- protected --- */ GstClock *clock; GstClockEntryType type; GstClockTime time; GstClockTime interval; GstClockEntryStatus status; GstClockCallback func; gpointer user_data; }; typedef enum { GST_CLOCK_STOPPED = 0, GST_CLOCK_TIMEOUT = 1, GST_CLOCK_EARLY = 2, GST_CLOCK_ERROR = 3, GST_CLOCK_UNSUPPORTED = 4 } GstClockReturn; 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), GST_CLOCK_FLAG_CAN_SET_SPEED = (1 << 6) } GstClockFlags; #define GST_CLOCK_FLAGS(clock) (GST_CLOCK(clock)->flags) struct _GstClock { GstObject object; GstClockFlags flags; /* --- protected --- */ GstClockTime start_time; GstClockTime last_time; gint64 max_diff; /* --- private --- */ gboolean accept_discont; gdouble speed; guint64 resolution; gboolean active; GList *entries; GMutex *active_mutex; GCond *active_cond; gboolean stats; gpointer _gst_reserved[GST_PADDING]; }; struct _GstClockClass { GstObjectClass parent_class; /* vtable */ gdouble (*change_speed) (GstClock *clock, gdouble oldspeed, gdouble newspeed); gdouble (*get_speed) (GstClock *clock); 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 */ GstClockEntryStatus (*wait) (GstClock *clock, GstClockEntry *entry); GstClockEntryStatus (*wait_async) (GstClock *clock, GstClockEntry *entry); void (*unschedule) (GstClock *clock, GstClockEntry *entry); void (*unlock) (GstClock *clock, GstClockEntry *entry); gpointer _gst_reserved[GST_PADDING]; }; GType gst_clock_get_type (void); gdouble gst_clock_set_speed (GstClock *clock, gdouble speed); gdouble gst_clock_get_speed (GstClock *clock); guint64 gst_clock_set_resolution (GstClock *clock, guint64 resolution); guint64 gst_clock_get_resolution (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); GstClockTime gst_clock_get_time (GstClock *clock); GstClockID gst_clock_get_next_id (GstClock *clock); /* 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); /* operations on IDs */ 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); void gst_clock_id_unlock (GstClockID id); void gst_clock_id_free (GstClockID id); G_END_DECLS #endif /* __GST_CLOCK_H__ */