| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Original MPlayer filters by Richard Felker, Hampa Hug, Daniel Moreno, | ||
| 3 | * and Michael Niedermeyer. | ||
| 4 | * | ||
| 5 | * Copyright (c) 2014 James Darnley <james.darnley@gmail.com> | ||
| 6 | * Copyright (c) 2015 Arwa Arif <arwaarif1994@gmail.com> | ||
| 7 | * | ||
| 8 | * This file is part of FFmpeg. | ||
| 9 | * | ||
| 10 | * FFmpeg is free software; you can redistribute it and/or modify | ||
| 11 | * it under the terms of the GNU General Public License as published by | ||
| 12 | * the Free Software Foundation; either version 2 of the License, or | ||
| 13 | * (at your option) any later version. | ||
| 14 | * | ||
| 15 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| 18 | * GNU General Public License for more details. | ||
| 19 | * | ||
| 20 | * You should have received a copy of the GNU General Public License along | ||
| 21 | * with FFmpeg; if not, write to the Free Software Foundation, Inc., | ||
| 22 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 23 | */ | ||
| 24 | |||
| 25 | #ifndef AVFILTER_EQ_H | ||
| 26 | #define AVFILTER_EQ_H | ||
| 27 | |||
| 28 | #include "avfilter.h" | ||
| 29 | #include "libavutil/eval.h" | ||
| 30 | |||
| 31 | static const char *const var_names[] = { | ||
| 32 | "n", // frame count | ||
| 33 | "r", // frame rate | ||
| 34 | "t", // timestamp expressed in seconds | ||
| 35 | NULL | ||
| 36 | }; | ||
| 37 | |||
| 38 | enum var_name { | ||
| 39 | VAR_N, | ||
| 40 | VAR_R, | ||
| 41 | VAR_T, | ||
| 42 | VAR_NB | ||
| 43 | }; | ||
| 44 | |||
| 45 | typedef struct EQParameters { | ||
| 46 | void (*adjust)(struct EQParameters *eq, uint8_t *dst, int dst_stride, | ||
| 47 | const uint8_t *src, int src_stride, int w, int h); | ||
| 48 | |||
| 49 | uint8_t lut[256]; | ||
| 50 | |||
| 51 | double brightness, contrast, gamma, gamma_weight; | ||
| 52 | int lut_clean; | ||
| 53 | |||
| 54 | } EQParameters; | ||
| 55 | |||
| 56 | typedef struct EQContext { | ||
| 57 | const AVClass *class; | ||
| 58 | |||
| 59 | EQParameters param[3]; | ||
| 60 | |||
| 61 | char *contrast_expr; | ||
| 62 | AVExpr *contrast_pexpr; | ||
| 63 | double contrast; | ||
| 64 | |||
| 65 | char *brightness_expr; | ||
| 66 | AVExpr *brightness_pexpr; | ||
| 67 | double brightness; | ||
| 68 | |||
| 69 | char *saturation_expr; | ||
| 70 | AVExpr *saturation_pexpr; | ||
| 71 | double saturation; | ||
| 72 | |||
| 73 | char *gamma_expr; | ||
| 74 | AVExpr *gamma_pexpr; | ||
| 75 | double gamma; | ||
| 76 | |||
| 77 | char *gamma_weight_expr; | ||
| 78 | AVExpr *gamma_weight_pexpr; | ||
| 79 | double gamma_weight; | ||
| 80 | |||
| 81 | char *gamma_r_expr; | ||
| 82 | AVExpr *gamma_r_pexpr; | ||
| 83 | double gamma_r; | ||
| 84 | |||
| 85 | char *gamma_g_expr; | ||
| 86 | AVExpr *gamma_g_pexpr; | ||
| 87 | double gamma_g; | ||
| 88 | |||
| 89 | char *gamma_b_expr; | ||
| 90 | AVExpr *gamma_b_pexpr; | ||
| 91 | double gamma_b; | ||
| 92 | |||
| 93 | double var_values[VAR_NB]; | ||
| 94 | |||
| 95 | void (*process)(struct EQParameters *par, uint8_t *dst, int dst_stride, | ||
| 96 | const uint8_t *src, int src_stride, int w, int h); | ||
| 97 | |||
| 98 | enum EvalMode { EVAL_MODE_INIT, EVAL_MODE_FRAME, EVAL_MODE_NB } eval_mode; | ||
| 99 | } EQContext; | ||
| 100 | |||
| 101 | 3 | static void process_c(EQParameters *param, uint8_t *dst, int dst_stride, | |
| 102 | const uint8_t *src, int src_stride, int w, int h) | ||
| 103 | { | ||
| 104 | 3 | int contrast = (int) (param->contrast * 256 * 16); | |
| 105 | 3 | int brightness = ((int) (100.0 * param->brightness + 100.0) * 511) / 200 - 128 - contrast / 32; | |
| 106 | |||
| 107 |
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771 | for (int y = 0; y < h; y++) { |
| 108 |
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197376 | for (int x = 0; x < w; x++) { |
| 109 | 196608 | int pel = ((src[y * src_stride + x] * contrast) >> 12) + brightness; | |
| 110 | |||
| 111 |
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196608 | if (pel & ~255) |
| 112 | 162561 | pel = (-pel) >> 31; | |
| 113 | |||
| 114 | 196608 | dst[y * dst_stride + x] = pel; | |
| 115 | } | ||
| 116 | } | ||
| 117 | 3 | } | |
| 118 | |||
| 119 | void ff_eq_init_x86(EQContext *eq); | ||
| 120 | |||
| 121 | 13 | static av_unused void ff_eq_init(EQContext *eq) | |
| 122 | { | ||
| 123 | 13 | eq->process = process_c; | |
| 124 | #if ARCH_X86 | ||
| 125 | 13 | ff_eq_init_x86(eq); | |
| 126 | #endif | ||
| 127 | 13 | } | |
| 128 | |||
| 129 | #endif /* AVFILTER_EQ_H */ | ||
| 130 |