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livetrax/libs/temporal/bbt_time.cc

87 lines
1.9 KiB
C++

/*
Copyright (C) 2002-2010 Paul Davis
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at your
option) any later version.
This program 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 Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <cmath>
#include <cassert>
#include "temporal/bbt_time.h"
using namespace Temporal;
BBT_Offset::BBT_Offset (double dbeats)
{
/* NOTE: this does not construct a BBT time in a canonical form,
in that beats may be a very large number, and bars will
always be zero. Hence ... it's a BBT_Offset
*/
assert (dbeats >= 0);
bars = 0;
beats = lrint (floor (dbeats));
ticks = lrint (floor (Temporal::ticks_per_beat * fmod (dbeats, 1.0)));
}
std::ostream&
std::operator<< (std::ostream& o, Temporal::BBT_Time const & bbt)
{
o << bbt.bars << '|' << bbt.beats << '|' << bbt.ticks;
return o;
}
std::ostream&
std::operator<< (std::ostream& o, const Temporal::BBT_Offset& bbt)
{
o << bbt.bars << '|' << bbt.beats << '|' << bbt.ticks;
return o;
}
std::istream&
std::operator>>(std::istream& i, Temporal::BBT_Offset& bbt)
{
int32_t B, b, t;
char skip_pipe_char;
i >> B;
i >> skip_pipe_char;
i >> b;
i >> skip_pipe_char;
i >> t;
bbt = Temporal::BBT_Offset (B, b, t);
return i;
}
std::istream&
std::operator>>(std::istream& i, Temporal::BBT_Time& bbt)
{
int32_t B, b, t;
char skip_pipe_char;
i >> B;
i >> skip_pipe_char;
i >> b;
i >> skip_pipe_char;
i >> t;
bbt = Temporal::BBT_Time (B, b, t);
return i;
}