mirror of
https://github.com/mpv-player/mpv
synced 2024-12-27 09:32:40 +00:00
73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
/*
|
|
* This file is part of mpv.
|
|
*
|
|
* mpv 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.
|
|
*
|
|
* mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <time.h>
|
|
#include <unistd.h>
|
|
#include <sys/time.h>
|
|
#include <limits.h>
|
|
#include <assert.h>
|
|
|
|
#include "common/common.h"
|
|
#include "common/msg.h"
|
|
#include "misc/random.h"
|
|
#include "threads.h"
|
|
#include "timer.h"
|
|
|
|
static uint64_t raw_time_offset;
|
|
static mp_once timer_init_once = MP_STATIC_ONCE_INITIALIZER;
|
|
|
|
static void do_timer_init(void)
|
|
{
|
|
mp_raw_time_init();
|
|
mp_rand_seed(mp_raw_time_ns());
|
|
raw_time_offset = mp_raw_time_ns();
|
|
assert(raw_time_offset > 0);
|
|
}
|
|
|
|
void mp_time_init(void)
|
|
{
|
|
mp_exec_once(&timer_init_once, do_timer_init);
|
|
}
|
|
|
|
int64_t mp_time_ns(void)
|
|
{
|
|
return mp_time_ns_from_raw_time(mp_raw_time_ns());
|
|
}
|
|
|
|
int64_t mp_time_ns_from_raw_time(uint64_t raw_time)
|
|
{
|
|
return raw_time - raw_time_offset;
|
|
}
|
|
|
|
double mp_time_sec(void)
|
|
{
|
|
return mp_time_ns() / 1e9;
|
|
}
|
|
|
|
int64_t mp_time_ns_add(int64_t time_ns, double timeout_sec)
|
|
{
|
|
assert(time_ns > 0); // mp_time_ns() returns strictly positive values
|
|
double t = MPCLAMP(timeout_sec * 1e9, -0x1p63, 0x1p63);
|
|
int64_t ti = t == 0x1p63 ? INT64_MAX : (int64_t)t;
|
|
if (ti > INT64_MAX - time_ns)
|
|
return INT64_MAX;
|
|
if (ti <= -time_ns)
|
|
return 1;
|
|
return time_ns + ti;
|
|
}
|