LCOV - code coverage report
Current view: top level - libavfilter - hermite.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 12 0.0 %
Date: 2017-12-16 13:57:32 Functions: 0 1 0.0 %

          Line data    Source code
       1             : /*
       2             :  * This file is part of FFmpeg.
       3             :  *
       4             :  * FFmpeg is free software; you can redistribute it and/or
       5             :  * modify it under the terms of the GNU Lesser General Public
       6             :  * License as published by the Free Software Foundation; either
       7             :  * version 2.1 of the License, or (at your option) any later version.
       8             :  *
       9             :  * FFmpeg is distributed in the hope that it will be useful,
      10             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      11             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12             :  * Lesser General Public License for more details.
      13             :  *
      14             :  * You should have received a copy of the GNU Lesser General Public
      15             :  * License along with FFmpeg; if not, write to the Free Software
      16             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      17             :  */
      18             : 
      19             : #ifndef AVFILTER_HERMITE_H
      20             : #define AVFILTER_HERMITE_H
      21             : 
      22           0 : static inline double hermite_interpolation(double x, double x0, double x1,
      23             :                                     double p0, double p1,
      24             :                                     double m0, double m1)
      25             : {
      26           0 :     double width = x1 - x0;
      27           0 :     double t = (x - x0) / width;
      28             :     double t2, t3;
      29             :     double ct0, ct1, ct2, ct3;
      30             : 
      31           0 :     m0 *= width;
      32           0 :     m1 *= width;
      33             : 
      34           0 :     t2 = t*t;
      35           0 :     t3 = t2*t;
      36           0 :     ct0 = p0;
      37           0 :     ct1 = m0;
      38             : 
      39           0 :     ct2 = -3 * p0 - 2 * m0 + 3 * p1 - m1;
      40           0 :     ct3 = 2 * p0 + m0  - 2 * p1 + m1;
      41             : 
      42           0 :     return ct3 * t3 + ct2 * t2 + ct1 * t + ct0;
      43             : }
      44             : 
      45             : #endif /* AVFILTER_HERMITE_H */

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