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// Copyright (C) by Josh Blum. See LICENSE.txt for licensing information.
#include <gras/time_tag.hpp>
#include <PMC/Containers.hpp>
#include <boost/cstdint.hpp> //uint64
#include <boost/math/special_functions/round.hpp>
#define TIME_TAG_TPS time_ticks_t(1000000000UL)
using namespace gras;
static TimeTag &normalize(TimeTag &t)
{
int num = int(t._ticks/TIME_TAG_TPS);
if (num < 0) num--; //stops negative ticks
t._fsecs += num;
t._ticks -= num*TIME_TAG_TPS;
return t;
}
TimeTag::TimeTag(void):
_fsecs(0), _ticks(0)
{/*NOP*/}
TimeTag TimeTag::from_ticks(const time_ticks_t ticks)
{
TimeTag t;
t._ticks = ticks;
return normalize(t);
}
TimeTag TimeTag::from_ticks(const time_ticks_t ticks, const double rate)
{
TimeTag t;
t._fsecs = time_ticks_t(ticks/rate);
const double error = ticks - (t._fsecs*rate);
t._ticks = boost::math::llround((error*TIME_TAG_TPS)/rate);
return normalize(t);
}
TimeTag TimeTag::from_pmc(const PMCC &p)
{
TimeTag t;
const PMCTuple<2> &tuple = p.as<PMCTuple<2> >();
t._fsecs = tuple[0].as<boost::uint64_t>();
t._ticks = boost::math::llround(tuple[1].as<double>()*TIME_TAG_TPS);
return normalize(t);
}
time_ticks_t TimeTag::to_ticks(void) const
{
return _fsecs*TIME_TAG_TPS + _ticks;
}
time_ticks_t TimeTag::to_ticks(const double rate) const
{
const time_ticks_t full = time_ticks_t(_fsecs*rate);
const double error = _fsecs - (full/rate);
return full + boost::math::llround(_ticks*rate/TIME_TAG_TPS + error*rate);
}
PMCC TimeTag::to_pmc(void) const
{
PMCTuple<2> tuple;
tuple[0] = PMC_M<boost::uint64_t>(_fsecs);
tuple[1] = PMC_M<double>(_ticks/double(TIME_TAG_TPS));
return PMC_M(tuple);
}
TimeTag &TimeTag::operator+=(const TimeTag &rhs)
{
_fsecs += rhs._fsecs;
_ticks += rhs._ticks;
return normalize(*this);
}
TimeTag &TimeTag::operator-=(const TimeTag &rhs)
{
_fsecs -= rhs._fsecs;
_ticks -= rhs._ticks;
return normalize(*this);
}
bool gras::operator<(const TimeTag &lhs, const TimeTag &rhs)
{
if (lhs._fsecs == rhs._fsecs) return lhs._ticks < rhs._ticks;
return lhs._fsecs < rhs._fsecs;
}
bool gras::operator==(const TimeTag &lhs, const TimeTag &rhs)
{
return (lhs._fsecs == rhs._fsecs) and (lhs._ticks == rhs._ticks);
}
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