mirror of
https://github.com/FFmpeg/FFmpeg.git
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65 lines
2.0 KiB
C
65 lines
2.0 KiB
C
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/*
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* Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
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* Copyright (c) 2013 Paul B Mahol
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVFILTER_NOISE_H
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#define AVFILTER_NOISE_H
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#include "libavutil/lfg.h"
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#include "avfilter.h"
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#define MAX_NOISE 5120
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#define MAX_SHIFT 1024
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#define MAX_RES (MAX_NOISE-MAX_SHIFT)
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#define NOISE_UNIFORM 1
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#define NOISE_TEMPORAL 2
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#define NOISE_AVERAGED 8
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#define NOISE_PATTERN 16
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typedef struct {
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int strength;
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unsigned flags;
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AVLFG lfg;
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int seed;
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int8_t *noise;
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int8_t *prev_shift[MAX_RES][3];
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int rand_shift[MAX_RES];
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int rand_shift_init;
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} FilterParams;
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typedef struct {
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const AVClass *class;
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int nb_planes;
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int bytewidth[4];
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int height[4];
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FilterParams all;
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FilterParams param[4];
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void (*line_noise)(uint8_t *dst, const uint8_t *src, const int8_t *noise, int len, int shift);
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void (*line_noise_avg)(uint8_t *dst, const uint8_t *src, int len, const int8_t * const *shift);
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} NoiseContext;
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void ff_line_noise_c(uint8_t *dst, const uint8_t *src, const int8_t *noise, int len, int shift);
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void ff_line_noise_avg_c(uint8_t *dst, const uint8_t *src, int len, const int8_t * const *shift);
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void ff_noise_init_x86(NoiseContext *n);
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#endif /* AVFILTER_NOISE_H */
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