2 Copyright (C) 2002-2010 Paul Davis
4 This program is free software; you can redistribute it and/or modify it
5 under the terms of the GNU Lesser General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or (at your
7 option) any later version.
9 This program is distributed in the hope that it will be useful, but WITHOUT
10 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
12 License for more details.
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 Foundation,
16 Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 #include "temporal/bbt_time.h"
24 using namespace Timecode;
26 /* This defines the smallest division of a "beat".
28 The number is intended to have as many integer factors as possible so that
29 1/Nth divisions are integer numbers of ticks.
31 1920 has many factors, though going up to 3840 gets a couple more.
33 This needs to match Temporal::Beats::PPQN
36 const double BBT_Time::ticks_per_beat = 1920.0;
38 BBT_Offset::BBT_Offset (double dbeats)
40 /* NOTE: this does not construct a BBT time in a canonical form,
41 in that beats may be a very large number, and bars will
42 always be zero. Hence ... it's a BBT_Offset
48 beats = lrint (floor (dbeats));
49 ticks = lrint (floor (BBT_Time::ticks_per_beat * fmod (dbeats, 1.0)));