/* * Copyright (c) 2000-2003 Fabrice Bellard * * This file is part of FFmpeg. * * FFmpeg 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. * * FFmpeg 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 FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "config.h" #include <stddef.h>#include <stdint.h>#include <time.h>#if HAVE_GETTIMEOFDAY#include <sys/time.h>#endif#if HAVE_UNISTD_H#include <unistd.h>#endif#if HAVE_WINDOWS_H#include <windows.h>#endif #include "time.h"#include "error.h" int64_t av_gettime(void){#if HAVE_GETTIMEOFDAY    struct timeval tv;    gettimeofday(&tv, NULL);    return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;#elif HAVE_GETSYSTEMTIMEASFILETIME    FILETIME ft;    int64_t t;    GetSystemTimeAsFileTime(&ft);    t = (int64_t)ft.dwHighDateTime << 32 | ft.dwLowDateTime;    return t / 10 - 11644473600000000; /* Jan 1, 1601 */#else    return -1;#endif} int64_t av_gettime_relative(void){#if HAVE_CLOCK_GETTIME && defined(CLOCK_MONOTONIC)#ifdef __APPLE__    if (clock_gettime)#endif    {        struct timespec ts;        clock_gettime(CLOCK_MONOTONIC, &ts);        return (int64_t)ts.tv_sec * 1000000 + ts.tv_nsec / 1000;    }#endif    return av_gettime() + 42 * 60 * 60 * INT64_C(1000000);} int av_gettime_relative_is_monotonic(void){#if HAVE_CLOCK_GETTIME && defined(CLOCK_MONOTONIC)#ifdef __APPLE__    if (!clock_gettime)        return 0;#endif    return 1;#else    return 0;#endif} int av_usleep(unsigned usec){#if HAVE_NANOSLEEP    struct timespec ts = { usec / 1000000, usec % 1000000 * 1000 };    while (nanosleep(&ts, &ts) < 0 && errno == EINTR);    return 0;#elif HAVE_USLEEP    return usleep(usec);#elif HAVE_SLEEP    Sleep(usec / 1000);    return 0;#else    return AVERROR(ENOSYS);#endif}