mirror of https://code.videolan.org/videolan/vlc
79 lines
3.8 KiB
C
79 lines
3.8 KiB
C
/*****************************************************************************
|
|
* vlc_mtime.h: high resolution time management functions
|
|
*****************************************************************************
|
|
* This header provides portable high precision time management functions,
|
|
* which should be the only ones used in other segments of the program, since
|
|
* functions like gettimeofday() and ftime() are not always supported.
|
|
* Most functions are declared as inline or as macros since they are only
|
|
* interfaces to system calls and have to be called frequently.
|
|
* 'm' stands for 'micro', since maximum resolution is the microsecond.
|
|
* Functions prototyped are implemented in interface/mtime.c.
|
|
*****************************************************************************
|
|
* Copyright (C) 1996, 1997, 1998, 1999, 2000 VLC authors and VideoLAN
|
|
* $Id$
|
|
*
|
|
* Authors: Vincent Seguin <seguin@via.ecp.fr>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation; either version 2.1 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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 Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this program; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
|
|
*****************************************************************************/
|
|
|
|
#ifndef __VLC_MTIME_H
|
|
# define __VLC_MTIME_H 1
|
|
|
|
/*****************************************************************************
|
|
* LAST_MDATE: date which will never happen
|
|
*****************************************************************************
|
|
* This date can be used as a 'never' date, to mark missing events in a function
|
|
* supposed to return a date, such as nothing to display in a function
|
|
* returning the date of the first image to be displayed. It can be used in
|
|
* comparaison with other values: all existing dates will be earlier.
|
|
*****************************************************************************/
|
|
#define LAST_MDATE ((mtime_t)((uint64_t)(-1)/2))
|
|
|
|
/*****************************************************************************
|
|
* MSTRTIME_MAX_SIZE: maximum possible size of mstrtime
|
|
*****************************************************************************
|
|
* This values is the maximal possible size of the string returned by the
|
|
* mstrtime() function, including '-' and the final '\0'. It should be used to
|
|
* allocate the buffer.
|
|
*****************************************************************************/
|
|
#define MSTRTIME_MAX_SIZE 22
|
|
|
|
/*****************************************************************************
|
|
* Prototypes
|
|
*****************************************************************************/
|
|
VLC_API char * secstotimestr( char *psz_buffer, int32_t secs );
|
|
|
|
/*****************************************************************************
|
|
* date_t: date incrementation without long-term rounding errors
|
|
*****************************************************************************/
|
|
struct date_t
|
|
{
|
|
mtime_t date;
|
|
uint32_t i_divider_num;
|
|
uint32_t i_divider_den;
|
|
uint32_t i_remainder;
|
|
};
|
|
|
|
VLC_API void date_Init( date_t *, uint32_t, uint32_t );
|
|
VLC_API void date_Change( date_t *, uint32_t, uint32_t );
|
|
VLC_API void date_Set( date_t *, mtime_t );
|
|
VLC_API mtime_t date_Get( const date_t * );
|
|
VLC_API void date_Move( date_t *, mtime_t );
|
|
VLC_API mtime_t date_Increment( date_t *, uint32_t );
|
|
VLC_API mtime_t date_Decrement( date_t *, uint32_t );
|
|
VLC_API uint64_t NTPtime64( void );
|
|
#endif /* !__VLC_MTIME_ */
|