-/*\r
-* Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>\r
-*\r
-* This file is part of CasparCG (www.casparcg.com).\r
-*\r
-* CasparCG is free software: you can redistribute it and/or modify\r
-* it under the terms of the GNU General Public License as published by\r
-* the Free Software Foundation, either version 3 of the License, or\r
-* (at your option) any later version.\r
-*\r
-* CasparCG is distributed in the hope that it will be useful,\r
-* but WITHOUT ANY WARRANTY; without even the implied warranty of\r
-* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
-* GNU General Public License for more details.\r
-*\r
-* You should have received a copy of the GNU General Public License\r
-* along with CasparCG. If not, see <http://www.gnu.org/licenses/>.\r
-*\r
-* Author: Robert Nagy, ronag89@gmail.com\r
-*/\r
-\r
-#include "stdafx.h"\r
-\r
-#include "prec_timer.h"\r
-\r
-#include "os/windows/windows.h"\r
-\r
-#include <Mmsystem.h>\r
-\r
-namespace caspar {\r
- \r
-prec_timer::prec_timer()\r
- : time_(0)\r
-{\r
-}\r
-\r
-// Author: Ryan M. Geiss\r
-// http://www.geisswerks.com/ryan/FAQS/timing.html\r
-void prec_timer::tick(double interval)\r
-{ \r
- auto t = ::timeGetTime();\r
-\r
- if (time_ != 0)\r
- {\r
- auto ticks_to_wait = static_cast<DWORD>(interval*1000.0);\r
- bool done = 0;\r
- do\r
- { \r
- auto ticks_passed = t - time_;\r
- auto ticks_left = ticks_to_wait - ticks_passed;\r
-\r
- if (t < time_) // time wrap\r
- done = 1;\r
- if (ticks_passed >= ticks_to_wait)\r
- done = 1;\r
- \r
- if (!done)\r
- {\r
- // if > 0.002s left, do Sleep(1), which will actually sleep some \r
- // steady amount, probably 1-2 ms,\r
- // and do so in a nice way (cpu meter drops; laptop battery spared).\r
- // otherwise, do a few Sleep(0)'s, which just give up the timeslice,\r
- // but don't really save cpu or battery, but do pass a tiny\r
- // amount of time.\r
- if (ticks_left > 2)\r
- Sleep(1);\r
- else \r
- for (int i = 0; i < 10; ++i) \r
- Sleep(0); // causes thread to give up its timeslice\r
- }\r
-\r
- t = ::timeGetTime();\r
- }\r
- while (!done); \r
- }\r
-\r
- time_ = t;\r
-} \r
-\r
+/*
+* Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>
+*
+* This file is part of CasparCG (www.casparcg.com).
+*
+* CasparCG is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* CasparCG 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 General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
+*
+* Author: Robert Nagy, ronag89@gmail.com
+*/
+
+#include "stdafx.h"
+
+#include "prec_timer.h"
+
+#include "os/windows/windows.h"
+
+#include <Mmsystem.h>
+
+namespace caspar {
+
+prec_timer::prec_timer()
+ : time_(0)
+{
+}
+
+// Author: Ryan M. Geiss
+// http://www.geisswerks.com/ryan/FAQS/timing.html
+void prec_timer::tick(double interval)
+{
+ auto t = ::timeGetTime();
+
+ if (time_ != 0)
+ {
+ auto ticks_to_wait = static_cast<DWORD>(interval*1000.0);
+ bool done = 0;
+ do
+ {
+ auto ticks_passed = t - time_;
+ auto ticks_left = ticks_to_wait - ticks_passed;
+
+ if (t < time_) // time wrap
+ done = 1;
+ if (ticks_passed >= ticks_to_wait)
+ done = 1;
+
+ if (!done)
+ {
+ // if > 0.002s left, do Sleep(1), which will actually sleep some
+ // steady amount, probably 1-2 ms,
+ // and do so in a nice way (cpu meter drops; laptop battery spared).
+ // otherwise, do a few Sleep(0)'s, which just give up the timeslice,
+ // but don't really save cpu or battery, but do pass a tiny
+ // amount of time.
+ if (ticks_left > 2)
+ Sleep(1);
+ else
+ for (int i = 0; i < 10; ++i)
+ Sleep(0); // causes thread to give up its timeslice
+ }
+
+ t = ::timeGetTime();
+ }
+ while (!done);
+ }
+
+ time_ = t;
+}
+
}
\ No newline at end of file
projects / casparcg / blobdiff