aboutsummaryrefslogtreecommitdiffstats
path: root/src/engine/quantize.hpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/engine/quantize.hpp')
-rw-r--r--src/engine/quantize.hpp46
1 files changed, 46 insertions, 0 deletions
diff --git a/src/engine/quantize.hpp b/src/engine/quantize.hpp
new file mode 100644
index 0000000..9cf939a
--- /dev/null
+++ b/src/engine/quantize.hpp
@@ -0,0 +1,46 @@
+/*
+ This file is part of Machina.
+ Copyright 2007-2013 David Robillard <http://drobilla.net>
+
+ Machina 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 any later version.
+
+ Machina 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 Machina. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef MACHINA_QUANTIZE_HPP
+#define MACHINA_QUANTIZE_HPP
+
+#include <cmath>
+
+#include "raul/TimeStamp.hpp"
+
+namespace machina {
+
+inline TimeStamp
+quantize(TimeStamp q, TimeStamp t)
+{
+ assert(q.unit() == t.unit());
+ // FIXME: Precision problem? Should probably stay in discrete domain
+ const double qd = q.to_double();
+ const double td = t.to_double();
+ return TimeStamp(t.unit(), (qd > 0) ? lrint(td / qd) * qd : td);
+}
+
+inline double
+quantize(double q, double t)
+{
+ return (q > 0)
+ ? lrint(t / q) * q
+ : t;
+}
+
+} // namespace machina
+
+#endif // MACHINA_QUANTIZE_HPP