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/*
* This file is part of mpv.
*
* mpv 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.
*
* mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef MPLAYER_FILTER_KERNELS_H
#define MPLAYER_FILTER_KERNELS_H
#include <stdbool.h>
struct filter_window {
const char *name;
double radius; // Preferred radius, should only be changed if resizable
double (*weight)(struct filter_window *k, double x);
bool resizable; // Filter supports any given radius
double params[2]; // User-defined custom filter parameters. Not used by
// all filters
double blur; // Blur coefficient (sharpens or widens the filter)
};
struct filter_kernel {
struct filter_window f; // the kernel itself
struct filter_window w; // window storage
bool clamp; // clamp to the range [0-1]
// Constant values
const char *window; // default window
bool polar; // whether or not the filter uses polar coordinates
// 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_window mp_filter_windows[];
extern const struct filter_kernel mp_filter_kernels[];
const struct filter_window *mp_find_filter_window(const char *name);
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_lut(struct filter_kernel *filter, int count, float *out_array);
#endif /* MPLAYER_FILTER_KERNELS_H */
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