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/*
* 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;
}
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