GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavfilter/hermite.h Lines: 0 12 0.0 %
Date: 2020-08-14 10:39:37 Branches: 0 0 - %

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/*
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg 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 GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#ifndef AVFILTER_HERMITE_H
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#define AVFILTER_HERMITE_H
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static inline double hermite_interpolation(double x, double x0, double x1,
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                                    double p0, double p1,
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                                    double m0, double m1)
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{
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    double width = x1 - x0;
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    double t = (x - x0) / width;
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    double t2, t3;
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    double ct0, ct1, ct2, ct3;
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    m0 *= width;
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    m1 *= width;
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    t2 = t*t;
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    t3 = t2*t;
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    ct0 = p0;
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    ct1 = m0;
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    ct2 = -3 * p0 - 2 * m0 + 3 * p1 - m1;
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    ct3 = 2 * p0 + m0  - 2 * p1 + m1;
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    return ct3 * t3 + ct2 * t2 + ct1 * t + ct0;
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}
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#endif /* AVFILTER_HERMITE_H */