mirror of
https://github.com/mpv-player/mpv
synced 2024-12-27 09:32:40 +00:00
4873b32c59
Finish renaming directories and moving files. Adjust all include
statements to make the previous commit compile.
The two commits are separate, because git is bad at tracking renames
and content changes at the same time.
Also take this as an opportunity to remove the separation between
"common" and "mplayer" sources in the Makefile. ("common" used to be
shared between mplayer and mencoder.)
99 lines
2.3 KiB
C
99 lines
2.3 KiB
C
/*
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* Precise timer routines using Mach timing
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*
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* Copyright (c) 2003-2004, Dan Villiom Podlaski Christiansen
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*/
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#include <unistd.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <time.h>
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#include <math.h>
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#include <sys/time.h>
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#include <mach/mach_time.h>
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#include "config.h"
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#include "core/mp_msg.h"
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#include "timer.h"
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/* global variables */
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static double timebase_ratio;
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/* the core sleep function, uses floats and is used in MPlayer G2 */
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static float sleep_accurate(float time_frame)
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{
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uint64_t deadline = time_frame / timebase_ratio + mach_absolute_time();
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mach_wait_until(deadline);
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return (mach_absolute_time() - deadline) * timebase_ratio;
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}
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/* wrapper for MPlayer G1 */
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int usec_sleep(int usec_delay)
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{
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return sleep_accurate(usec_delay / 1e6) * 1e6;
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}
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/* current time in microseconds */
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unsigned int GetTimer(void)
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{
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return (unsigned int)(uint64_t)(mach_absolute_time() * timebase_ratio * 1e6);
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}
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/* current time in milliseconds */
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unsigned int GetTimerMS(void)
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{
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return (unsigned int)(uint64_t)(mach_absolute_time() * timebase_ratio * 1e3);
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}
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/* initialize timer, must be called at least once at start */
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void InitTimer(void)
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{
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struct mach_timebase_info timebase;
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mach_timebase_info(&timebase);
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timebase_ratio = (double)timebase.numer / (double)timebase.denom
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* (double)1e-9;
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}
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#if 0
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#include <stdio.h>
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int main(void) {
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int i,j, r, c = 200;
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long long t = 0;
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InitTimer();
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for (i = 0; i < c; i++) {
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const int delay = rand() / (RAND_MAX / 1e5);
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j = GetTimer();
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#if 1
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r = usec_sleep(delay);
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#else
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r = sleep_accurate(delay / 1e6) * 1e6;
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#endif
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j = (GetTimer() - j) - delay;
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printf("sleep time:%8i %5i (%i)\n", delay, j, j - r);
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t += j - r;
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}
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fprintf(stderr, "average error:\t%lli\n", t / c);
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return 0;
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}
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#endif
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