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/*
* This file is part of mplayer2.
*
* mplayer2 is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* mplayer2 is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with mplayer2; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MPLAYER_FILTER_KERNELS_H
#define MPLAYER_FILTER_KERNELS_H
#include <stdbool.h>
struct filter_kernel {
const char *name;
double radius; // A negative value will use user specified radius instead.
double (*weight)(struct filter_kernel *kernel, double x);
// The filter params can be changed at runtime. Only used by some filters.
float params[2];
// Whether or not the filter uses polar coordinates
bool polar;
// The following values are set by mp_init_filter() at runtime.
int size; // number of coefficients (may depend on radius)
double inv_scale; // scale factor (<1.0 is upscale, >1.0 downscale)
};
extern const struct filter_kernel mp_filter_kernels[];
const struct filter_kernel *mp_find_filter_kernel(const char *name);
bool mp_init_filter(struct filter_kernel *filter, const int *sizes,
double scale);
void mp_compute_weights(struct filter_kernel *filter, double f, float *out_w);
void mp_compute_lut(struct filter_kernel *filter, int count, float *out_array);
#endif /* MPLAYER_FILTER_KERNELS_H */
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