mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
40e6575aa3
This is more spec-compliant because it does not rely on dead-code elimination by the compiler. Especially MSVC has problems with this, as can be seen in https://ffmpeg.org/pipermail/ffmpeg-devel/2022-May/296373.html or https://ffmpeg.org/pipermail/ffmpeg-devel/2022-May/297022.html This commit does not eliminate every instance where we rely on dead code elimination: It only tackles branching to the initialization of arch-specific dsp code, not e.g. all uses of CONFIG_ and HAVE_ checks. But maybe it is already enough to compile FFmpeg with MSVC with whole-programm-optimizations enabled (if one does not disable too many components). Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
132 lines
3.3 KiB
C
132 lines
3.3 KiB
C
/*
|
|
* Original MPlayer filters by Richard Felker, Hampa Hug, Daniel Moreno,
|
|
* and Michael Niedermeyer.
|
|
*
|
|
* Copyright (c) 2014 James Darnley <james.darnley@gmail.com>
|
|
* Copyright (c) 2015 Arwa Arif <arwaarif1994@gmail.com>
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg 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.
|
|
*
|
|
* FFmpeg 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 FFmpeg; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#ifndef AVFILTER_EQ_H
|
|
#define AVFILTER_EQ_H
|
|
|
|
#include "avfilter.h"
|
|
#include "libavutil/eval.h"
|
|
|
|
static const char *const var_names[] = {
|
|
"n", // frame count
|
|
"pos", // frame position
|
|
"r", // frame rate
|
|
"t", // timestamp expressed in seconds
|
|
NULL
|
|
};
|
|
|
|
enum var_name {
|
|
VAR_N,
|
|
VAR_POS,
|
|
VAR_R,
|
|
VAR_T,
|
|
VAR_NB
|
|
};
|
|
|
|
typedef struct EQParameters {
|
|
void (*adjust)(struct EQParameters *eq, uint8_t *dst, int dst_stride,
|
|
const uint8_t *src, int src_stride, int w, int h);
|
|
|
|
uint8_t lut[256];
|
|
|
|
double brightness, contrast, gamma, gamma_weight;
|
|
int lut_clean;
|
|
|
|
} EQParameters;
|
|
|
|
typedef struct EQContext {
|
|
const AVClass *class;
|
|
|
|
EQParameters param[3];
|
|
|
|
char *contrast_expr;
|
|
AVExpr *contrast_pexpr;
|
|
double contrast;
|
|
|
|
char *brightness_expr;
|
|
AVExpr *brightness_pexpr;
|
|
double brightness;
|
|
|
|
char *saturation_expr;
|
|
AVExpr *saturation_pexpr;
|
|
double saturation;
|
|
|
|
char *gamma_expr;
|
|
AVExpr *gamma_pexpr;
|
|
double gamma;
|
|
|
|
char *gamma_weight_expr;
|
|
AVExpr *gamma_weight_pexpr;
|
|
double gamma_weight;
|
|
|
|
char *gamma_r_expr;
|
|
AVExpr *gamma_r_pexpr;
|
|
double gamma_r;
|
|
|
|
char *gamma_g_expr;
|
|
AVExpr *gamma_g_pexpr;
|
|
double gamma_g;
|
|
|
|
char *gamma_b_expr;
|
|
AVExpr *gamma_b_pexpr;
|
|
double gamma_b;
|
|
|
|
double var_values[VAR_NB];
|
|
|
|
void (*process)(struct EQParameters *par, uint8_t *dst, int dst_stride,
|
|
const uint8_t *src, int src_stride, int w, int h);
|
|
|
|
enum EvalMode { EVAL_MODE_INIT, EVAL_MODE_FRAME, EVAL_MODE_NB } eval_mode;
|
|
} EQContext;
|
|
|
|
static void process_c(EQParameters *param, uint8_t *dst, int dst_stride,
|
|
const uint8_t *src, int src_stride, int w, int h)
|
|
{
|
|
int contrast = (int) (param->contrast * 256 * 16);
|
|
int brightness = ((int) (100.0 * param->brightness + 100.0) * 511) / 200 - 128 - contrast / 32;
|
|
|
|
for (int y = 0; y < h; y++) {
|
|
for (int x = 0; x < w; x++) {
|
|
int pel = ((src[y * src_stride + x] * contrast) >> 12) + brightness;
|
|
|
|
if (pel & ~255)
|
|
pel = (-pel) >> 31;
|
|
|
|
dst[y * dst_stride + x] = pel;
|
|
}
|
|
}
|
|
}
|
|
|
|
void ff_eq_init_x86(EQContext *eq);
|
|
|
|
static av_unused void ff_eq_init(EQContext *eq)
|
|
{
|
|
eq->process = process_c;
|
|
#if ARCH_X86
|
|
ff_eq_init_x86(eq);
|
|
#endif
|
|
}
|
|
|
|
#endif /* AVFILTER_EQ_H */
|