/*

 * This file is part of libbluray

 * Copyright (C) 2010  VideoLAN

 *

 * This library 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.

 *

 * This library 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 this library. If not, see

 * <http://www.gnu.org/licenses/>.

 */

#if HAVE_CONFIG_H

#include "config.h"

#endif

#include "time.h"

#include <stdint.h>

#if defined(_WIN32)

#   include <windows.h>

#elif defined(HAVE_SYS_TIME_H)

#   include <sys/time.h>

#else

#   error no time support found

#endif

#if defined(_WIN32)

static uint64_t _bd_get_scr_impl(void)

{

    HANDLE thread;

    DWORD_PTR mask;

    LARGE_INTEGER frequency, counter;

    thread = GetCurrentThread();

    mask = SetThreadAffinityMask(thread, 1);

    QueryPerformanceFrequency(&frequency);

    QueryPerformanceCounter(&counter);

    SetThreadAffinityMask(thread, mask);

    return (uint64_t)(counter.QuadPart * 1000.0 / frequency.QuadPart) * 90;

}

#elif defined(HAVE_SYS_TIME_H)

static uint64_t _bd_get_scr_impl(void)

{

    struct timeval tv;

    gettimeofday(&tv, 0);

    return ((uint64_t)tv.tv_sec * 1000 + tv.tv_usec / 1000) * 90;

}

#endif

uint64_t bd_get_scr(void)

{

    static uint64_t t0 = (uint64_t)-1;

    uint64_t now = _bd_get_scr_impl();

    if (t0 > now) {

        t0 = now;

    }

    return now - t0;

}