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| author | Bin Jin <bjin1990@gmail.com> | 2014-08-25 22:15:42 +0200 |
|---|---|---|
| committer | wm4 <wm4@nowhere> | 2014-08-26 22:18:55 +0200 |
| commit | a8b67c66f24700205923959b005b2547490e6c8e (patch) | |
| tree | d3891741ac535a9ff02e21af21d34adbacbbaa47 | |
| parent | 3ec6705e3410e96d74b108cb444b826749d8217c (diff) | |
| download | mpv-a8b67c66f24700205923959b005b2547490e6c8e.tar.bz2 mpv-a8b67c66f24700205923959b005b2547490e6c8e.tar.xz | |
vo_opengl: add spline64 filter kernel
The coefficients are taken from fmtconv plugin for vapoursynth:
https://github.com/vapoursynth/fmtconv/blob/master/src/fmtc/ContFirSpline64.cpp
The package is licensed under WTFPL, and it's from the same author
of Dither plugin for avisynth.
| -rw-r--r-- | video/out/filter_kernels.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/video/out/filter_kernels.c b/video/out/filter_kernels.c index ed181ef38a..c8efbe5731 100644 --- a/video/out/filter_kernels.c +++ b/video/out/filter_kernels.c @@ -9,6 +9,10 @@ * Also see glumpy (BSD licensed), contains the same code in Python: * http://code.google.com/p/glumpy/source/browse/glumpy/image/filter.py * + * Also see Vapoursynth plugin fmtconv (WTFPL Licensed), which is based on + * dither plugin for avisynth from the same author: + * https://github.com/vapoursynth/fmtconv/tree/master/src/fmtc + * * Also see: Paul Heckbert's "zoom" * * Also see XBMC: ConvolutionKernels.cpp etc. @@ -222,6 +226,20 @@ static double spline36(kernel *k, double x) * (x - 2); } +static double spline64(kernel *k, double x) +{ + if (x < 1.0) + return ((49.0 / 41.0 * x - 6387.0 / 2911.0) * x - 3.0 / 2911.0) * x + 1.0; + if (x < 2.0) + return ((-24.0 / 41.0 * (x - 1) + 4032.0 / 2911.0) * (x - 1) - 2328.0 / 2911.0) + * (x - 1); + if (x < 3.0) + return ((6.0 / 41.0 * (x - 2) - 1008.0 / 2911.0) * (x - 2) + 582.0 / 2911.0) + * (x - 2); + return ((-1.0 / 41.0 * (x - 3) + 168.0 / 2911.0) * (x - 3) - 97.0 / 2911.0) + * (x - 3); +} + static double gaussian(kernel *k, double x) { return exp(-2.0 * x * x) * sqrt(2.0 / M_PI); @@ -271,6 +289,7 @@ const struct filter_kernel mp_filter_kernels[] = { {"mitchell", 2, mitchell, .params = {1.0/3.0, 1.0/3.0} }, {"spline16", 2, spline16}, {"spline36", 3, spline36}, + {"spline64", 4, spline64}, {"gaussian", 2, gaussian}, {"sinc2", 2, sinc}, {"sinc3", 3, sinc}, |