mirror of
https://github.com/mpv-player/mpv
synced 2024-12-11 09:25:56 +00:00
f544bcf105
clock_gettime is implemented in winpthreads, so it's unavailable when mpv is compiled with its internal pthreads implementation. This makes mp_raw_time_us fall back to gettimeofday(), which can cause an assert failure in mp_add_timeout() when the system clock is changed. Use QueryPerformanceCounter instead. The clock_gettime(CLOCK_MONOTONIC) implementation in winpthreads uses QueryPerformanceCounter anyway, so there shouldn't be any change in behaviour.
57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
/*
|
|
* precise timer routines for Windows
|
|
*
|
|
* This file is part of mpv.
|
|
*
|
|
* mpv is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with mpv. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <windows.h>
|
|
#include <sys/time.h>
|
|
#include <mmsystem.h>
|
|
#include <stdlib.h>
|
|
#include "timer.h"
|
|
|
|
static LARGE_INTEGER perf_freq;
|
|
|
|
void mp_sleep_us(int64_t us)
|
|
{
|
|
if (us < 0)
|
|
return;
|
|
// Sleep(0) won't sleep for one clocktick as the unix usleep
|
|
// instead it will only make the thread ready
|
|
// it may take some time until it actually starts to run again
|
|
if (us < 1000)
|
|
us = 1000;
|
|
Sleep(us / 1000);
|
|
}
|
|
|
|
uint64_t mp_raw_time_us(void)
|
|
{
|
|
LARGE_INTEGER perf_count;
|
|
QueryPerformanceCounter(&perf_count);
|
|
|
|
// Convert QPC units (1/perf_freq seconds) to microseconds. This will work
|
|
// without overflow because the QPC value is guaranteed not to roll-over
|
|
// within 100 years, so perf_freq must be less than 2.9*10^9.
|
|
return perf_count.QuadPart / perf_freq.QuadPart * 1000000 +
|
|
perf_count.QuadPart % perf_freq.QuadPart * 1000000 / perf_freq.QuadPart;
|
|
}
|
|
|
|
void mp_raw_time_init(void)
|
|
{
|
|
QueryPerformanceFrequency(&perf_freq);
|
|
timeBeginPeriod(1); // request 1ms timer resolution
|
|
}
|