osdep/timer-win2.c

   1 /*
   2  * precise timer routines for Windows
   3  *
   4  * This file is part of MPlayer.
   5  *
   6  * MPlayer is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * MPlayer is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21 #include <windows.h>
  22 #include <mmsystem.h>
  23 #include "timer.h"
  24
  25 const char *timer_name = "Windows native";
  26
  27 // Returns current time in microseconds
  28 unsigned int GetTimer(void)
  29 {
  30   return timeGetTime() * 1000;
  31 }
  32
  33 // Returns current time in milliseconds
  34 unsigned int GetTimerMS(void)
  35 {
  36   return timeGetTime() ;
  37 }
  38
  39 int usec_sleep(int usec_delay){
  40   // Sleep(0) won't sleep for one clocktick as the unix usleep
  41   // instead it will only make the thread ready
  42   // it may take some time until it actually starts to run again
  43   if(usec_delay<1000)usec_delay=1000;
  44   Sleep( usec_delay/1000);
  45   return 0;
  46 }
  47
  48 static DWORD RelativeTime = 0;
  49
  50 float GetRelativeTime(void)
  51 {
  52   DWORD t, r;
  53   t = GetTimer();
  54   r = t - RelativeTime;
  55   RelativeTime = t;
  56   return (float) r *0.000001F;
  57 }
  58
  59 void InitTimer(void)
  60 {
  61   GetRelativeTime();
  62 }