Tempo based time in Machina (and related utilities added to Raul).

git-svn-id: http://svn.drobilla.net/lad/raul@324 a436a847-0d15-0410-975c-d299462d15a1

1 files changed, 54 insertions, 0 deletions

diff --git a/src/TimeSlice.cpp b/src/TimeSlice.cpp
new file mode 100644
index 0000000..d6b7fc6
--- /dev/null
+++ b/src/TimeSlice.cpp
@@ -0,0 +1,54 @@
+/* This file is part of Raul.
+ * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
+ * 
+ * Raul 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 2 of the License, or (at your option) any later
+ * version.
+ * 
+ * Raul 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 details.
+ * 
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <raul/TimeSlice.h>
+
+namespace Raul {
+
+
+TimeSlice::TimeSlice(double tick_rate, double bpm)
+	: _tick_rate(tick_rate)
+	, _beat_rate(60.0/bpm)
+	, _start_ticks(0)
+	, _offset(0)
+	, _length(0)
+	, _start_beats(0)
+{}
+					 
+
+/** Update beat time to match real (tick) time.
+ */
+void
+TimeSlice::update_beat_time()
+{
+	_start_beats = (start_ticks() * _tick_rate) / _beat_rate;
+}
+
+
+TickTime
+TimeSlice::beats_to_ticks(BeatTime beats)
+{
+	return static_cast<TickTime>(beats_to_seconds(beats) / _tick_rate); 
+}
+
+Seconds
+TimeSlice::beats_to_seconds(BeatTime beats)
+{
+	return (beats * _beat_rate);
+}
+
+} // namespace Raul