| Line | Branch | Exec | Source |
|---|---|---|---|
| 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 | ✗ | static inline double hermite_interpolation(double x, double x0, double x1, | |
| 23 | double p0, double p1, | ||
| 24 | double m0, double m1) | ||
| 25 | { | ||
| 26 | ✗ | double width = x1 - x0; | |
| 27 | ✗ | double t = (x - x0) / width; | |
| 28 | double t2, t3; | ||
| 29 | double ct0, ct1, ct2, ct3; | ||
| 30 | |||
| 31 | ✗ | m0 *= width; | |
| 32 | ✗ | m1 *= width; | |
| 33 | |||
| 34 | ✗ | t2 = t*t; | |
| 35 | ✗ | t3 = t2*t; | |
| 36 | ✗ | ct0 = p0; | |
| 37 | ✗ | ct1 = m0; | |
| 38 | |||
| 39 | ✗ | ct2 = -3 * p0 - 2 * m0 + 3 * p1 - m1; | |
| 40 | ✗ | ct3 = 2 * p0 + m0 - 2 * p1 + m1; | |
| 41 | |||
| 42 | ✗ | return ct3 * t3 + ct2 * t2 + ct1 * t + ct0; | |
| 43 | } | ||
| 44 | |||
| 45 | #endif /* AVFILTER_HERMITE_H */ | ||
| 46 |