windows/JackWinTime.c

   1 /*
   2  Copyright (C) 2004-2008 Grame
   3
   4  This program is free software; you can redistribute it and/or modify
   5  it under the terms of the GNU Lesser General Public License as published by
   6  the Free Software Foundation; either version 2.1 of the License, or
   7  (at your option) any later version.
   8
   9  This program is distributed in the hope that it will be useful,
  10  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  GNU Lesser General Public License for more details.
  13
  14  You should have received a copy of the GNU Lesser General Public License
  15  along with this program; if not, write to the Free Software
  16  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17
  18  */
  19
  20
  21 #include "JackTime.h"
  22 #include "JackError.h"
  23
  24 static LARGE_INTEGER _jack_freq;
  25 static UINT gPeriod = 0;
  26
  27 SERVER_EXPORT void JackSleep(long usec)
  28 {
  29         Sleep(usec / 1000);
  30 }
  31
  32 SERVER_EXPORT void InitTime()
  33 {
  34         QueryPerformanceFrequency(&_jack_freq);
  35     TIMECAPS caps;
  36     if (timeGetDevCaps(&caps, sizeof(TIMECAPS)) != TIMERR_NOERROR) {
  37         jack_error("InitTime : could not get timer device");
  38     } else {
  39         gPeriod = caps.wPeriodMin;
  40         if (timeBeginPeriod(gPeriod) != TIMERR_NOERROR) {
  41             jack_error("InitTime : could not set minimum timer");
  42             gPeriod = 0;
  43         } else {
  44             jack_info("InitTime : multimedia timer resolution set to %d milliseconds", gPeriod);
  45        }
  46     }
  47 }
  48
  49 SERVER_EXPORT void EndTime()
  50 {
  51     if (gPeriod > 0) {
  52         timeEndPeriod(gPeriod);
  53     }
  54 }
  55
  56 SERVER_EXPORT jack_time_t GetMicroSeconds(void)
  57 {
  58         LARGE_INTEGER t1;
  59         QueryPerformanceCounter(&t1);
  60         return (jack_time_t)(((double)t1.QuadPart) / ((double)_jack_freq.QuadPart) * 1000000.0);
  61 }
  62
  63 void SetClockSource(jack_timer_type_t source)
  64 {}
  65
  66 const char* ClockSourceName(jack_timer_type_t source)
  67 {
  68     return "";
  69 }