mirror of https://github.com/mpv-player/mpv
73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* mpv 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
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdlib.h>
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#include <time.h>
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#include <unistd.h>
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#include <sys/time.h>
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#include <limits.h>
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#include <assert.h>
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#include "common/common.h"
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#include "common/msg.h"
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#include "misc/random.h"
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#include "threads.h"
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#include "timer.h"
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static uint64_t raw_time_offset;
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static mp_once timer_init_once = MP_STATIC_ONCE_INITIALIZER;
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static void do_timer_init(void)
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{
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mp_raw_time_init();
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mp_rand_seed(mp_raw_time_ns());
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raw_time_offset = mp_raw_time_ns();
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assert(raw_time_offset > 0);
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}
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void mp_time_init(void)
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{
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mp_exec_once(&timer_init_once, do_timer_init);
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}
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int64_t mp_time_ns(void)
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{
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return mp_time_ns_from_raw_time(mp_raw_time_ns());
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}
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int64_t mp_time_ns_from_raw_time(uint64_t raw_time)
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{
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return raw_time - raw_time_offset;
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}
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double mp_time_sec(void)
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{
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return mp_time_ns() / 1e9;
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}
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int64_t mp_time_ns_add(int64_t time_ns, double timeout_sec)
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{
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assert(time_ns > 0); // mp_time_ns() returns strictly positive values
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double t = MPCLAMP(timeout_sec * 1e9, -0x1p63, 0x1p63);
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int64_t ti = t == 0x1p63 ? INT64_MAX : (int64_t)t;
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if (ti > INT64_MAX - time_ns)
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return INT64_MAX;
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if (ti <= -time_ns)
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return 1;
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return time_ns + ti;
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}
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