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75 lines
2.1 KiB
C++
75 lines
2.1 KiB
C++
/**
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* @file
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* @brief Header file for Fraction class
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* @author Jonathan Thomas <jonathan@openshot.org>
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*
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* @section LICENSE
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*
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* Copyright (c) 2008-2013 OpenShot Studios, LLC
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* (http://www.openshotstudios.com). This file is part of
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* OpenShot Library (http://www.openshot.org), an open-source project
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* dedicated to delivering high quality video editing and animation solutions
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* to the world.
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*
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* OpenShot Library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* OpenShot Library 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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*
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* You should have received a copy of the GNU General Public License
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* along with OpenShot Library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef OPENSHOT_FRACTION_H
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#define OPENSHOT_FRACTION_H
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#include <math.h>
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namespace openshot {
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/**
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* @brief This class represents a fraction
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*
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* Fractions are often used in video editing to represent ratios and rates, for example:
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* pixel ratios, frames per second, timebase, and other common ratios. Fractions are preferred
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* over decimals due to their increased precision.
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*/
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class Fraction {
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public:
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int num; ///<Numerator for the fraction
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int den; ///<Denominator for the fraction
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/// Default Constructor
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Fraction();
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/// Constructor with numerator and denominator
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Fraction(int num, int den);
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/// Calculate the greatest common denominator
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int GreatestCommonDenominator();
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/// Reduce this fraction (i.e. 640/480 = 4/3)
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void Reduce();
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/// Return this fraction as a float (i.e. 1/2 = 0.5)
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float ToFloat();
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/// Return this fraction as a double (i.e. 1/2 = 0.5)
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double ToDouble();
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/// Return a rounded integer of the fraction (for example 30000/1001 returns 30)
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int ToInt();
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/// Return the reciprocal as a Fraction
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Fraction Reciprocal();
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};
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}
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#endif
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