170 lines
4.4 KiB
C++
170 lines
4.4 KiB
C++
/*
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Time - convenience wrapper for working with gavl_time in C++
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Copyright (C) Lumiera.org
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2008, Hermann Vosseler <Ichthyostega@web.de>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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* *****************************************************/
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#include "lib/lumitime.hpp"
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#include "lib/time/timevalue.hpp"
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#include "lib/time.h"
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#include <limits>
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#include <string>
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#include <boost/rational.hpp>
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using std::string;
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namespace lib {
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namespace time {
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namespace {
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/** implementation detail: convert a rational number denoting fractionalSeconds
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* into the internal time scale used by GAVL and Lumiera internal time values.
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*/
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inline gavl_time_t
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rational2time (FSecs const& fractionalSeconds)
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{
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return boost::rational_cast<gavl_time_t> (GAVL_TIME_SCALE * fractionalSeconds);
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}
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}
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/** @note the allowed time range is explicitly limited to help overflow protection */
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const Time Time::MAX ( TimeValue::buildRaw_(+std::numeric_limits<gavl_time_t>::max() / 30) );
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const Time Time::MIN ( TimeValue::buildRaw_(-_raw(Time::MAX) ) );
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/** convenience constructor to build an
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* internal Lumiera Time value from the usual parts
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* of an sexagesimal time specification. Arbitrary integral
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* values are acceptable and will be summed up accordingly.
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* The minute and hour part can be omitted.
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* @warning internal Lumiera time values refer to an
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* implementation dependent time origin/scale.
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* The given value will be used as-is, without
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* any further adjustments.
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*/
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Time::Time ( long millis
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, uint secs
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, uint mins
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, uint hours
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)
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: TimeValue(lumiera_build_time (millis,secs,mins,hours))
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{ }
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/** convenience constructor to build an Time value
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* from a fraction of seconds, given as rational number.
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* An example would be to the time unit of a framerate.
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*/
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Time::Time (FSecs const& fractionalSeconds)
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: TimeValue(rational2time (fractionalSeconds))
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{ }
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/** displaying an internal Lumiera Time value
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* for diagnostic purposes or internal reporting.
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* @warning internal Lumiera time values refer to an
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* implementation dependent time origin/scale.
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* @return string rendering of the actual, underlying
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* implementation value, as \c h:m:s:ms
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*/
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Time::operator string() const
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{
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return string (lumiera_tmpbuf_print_time (t_));
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}
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TimeVar::operator string() const
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{
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return string (lumiera_tmpbuf_print_time (t_));
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}
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/** @internal backdoor to sneak in a raw time value
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* bypassing any normalisation and limiting */
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TimeValue
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TimeValue::buildRaw_ (gavl_time_t raw)
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{
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return reinterpret_cast<TimeValue const&> (raw);
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}
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}} // namespace lib::Time
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///////////////////////////////////////////////////////////////////////////TODO leftover of the existing/initial lumitime-Implementation
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namespace lumiera {
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const Time Time::MAX ( +std::numeric_limits<int64_t>::max() );
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const Time Time::MIN ( -std::numeric_limits<int64_t>::max() );
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Time::Time ( long millis
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, uint secs
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, uint mins
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, uint hours
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)
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: t_(lumiera_build_time (millis,secs,mins,hours))
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{ }
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int
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Time::getMillis() const
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{
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return lumiera_time_millis(t_);
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}
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int
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Time::getSecs() const
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{
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return lumiera_time_seconds(t_);
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}
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int
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Time::getMins() const
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{
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return lumiera_time_minutes(t_);
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}
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int
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Time::getHours() const
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{
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return lumiera_time_hours(t_);
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}
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int
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Time::getFrames() const
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{
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// TODO
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return 0;
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}
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Time::operator string() const
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{
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return string (lumiera_tmpbuf_print_time (t_));
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}
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} // namespace lumiera
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