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avfilter: Port mp=eq/eq2 to lavfi 

Code adapted from James Darnley's port
Some fixes from Paul B Mahol <onemda@gmail.com>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
tags/n2.6
Arwa Arif Michael Niedermayer 10 years ago
parent
7aeafacfd0
commit
4c38e960d0
9 changed files with 475 additions and 2 deletions
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  1. +1
    -0
      configure
  2. +43
    -0
      doc/filters.texi
  3. +1
    -0
      libavfilter/Makefile
  4. +1
    -0
      libavfilter/allfilters.c
  5. +2
    -2
      libavfilter/version.h
  6. +270
    -0
      libavfilter/vf_eq.c
  7. +60
    -0
      libavfilter/vf_eq.h
  8. +1
    -0
      libavfilter/x86/Makefile
  9. +96
    -0
      libavfilter/x86/vf_eq.c

+ 1
- 0
configure View File

@@ -2581,6 +2581,7 @@ delogo_filter_deps="gpl"
deshake_filter_select="pixelutils"
drawtext_filter_deps="libfreetype"
ebur128_filter_deps="gpl"
eq_filter_deps="gpl"
flite_filter_deps="libflite"
frei0r_filter_deps="frei0r dlopen"
frei0r_src_filter_deps="frei0r dlopen"


+ 43
- 0
doc/filters.texi View File

@@ -4335,6 +4335,49 @@ edgedetect=mode=colormix:high=0
@end example
@end itemize

@section eq
Set brightness, contrast, saturation and approximate gamma adjustment.

The filter accepts the following options:

@table @option
@item contrast
Set the contrast value. It accepts a float value in range @code{-2.0} to
@code{2.0}. The default value is @code{0.0}.

@item brightness
Set the brightness value. It accepts a float value in range @code{-1.0} to
@code{1.0}. The default value is @code{0.0}.

@item saturation
Set the saturation value. It accepts a float value in range @code{0.0} to
@code{3.0}. The default value is @code{1.0}.

@item gamma
Set the gamma value. It accepts a float value in range @code{0.1} to @code{10.0}.
The default value is @code{1.0}.

@item gamma_r
Set the gamma value for red. It accepts a float value in range
@code{0.1} to @code{10.0}. The default value is @code{1.0}.

@item gamma_g
Set the gamma value for green. It accepts a float value in range
@code{0.1} to @code{10.0}. The default value is @code{1.0}.

@item gamma_b
Set the gamma value for blue. It accepts a float value in range
@code{0.1} to @code{10.0}. The default value is @code{1.0}.

@item gamma_weight
Can be used to reduce the effect of a high gamma value on bright image areas,
e.g. keep them from getting overamplified and just plain white. It accepts a
float value in range @code{0.0} to @code{1.0}.A value of @code{0.0} turns the
gamma correction all the way down while @code{1.0} leaves it at its full strength.
Default is @code{1.0}.

@end table

@section extractplanes

Extract color channel components from input video stream into


+ 1
- 0
libavfilter/Makefile View File

@@ -116,6 +116,7 @@ OBJS-$(CONFIG_DRAWGRID_FILTER) += vf_drawbox.o
OBJS-$(CONFIG_DRAWTEXT_FILTER) += vf_drawtext.o
OBJS-$(CONFIG_ELBG_FILTER) += vf_elbg.o
OBJS-$(CONFIG_EDGEDETECT_FILTER) += vf_edgedetect.o
OBJS-$(CONFIG_EQ_FILTER) += vf_eq.o
OBJS-$(CONFIG_EXTRACTPLANES_FILTER) += vf_extractplanes.o
OBJS-$(CONFIG_FADE_FILTER) += vf_fade.o
OBJS-$(CONFIG_FIELD_FILTER) += vf_field.o


+ 1
- 0
libavfilter/allfilters.c View File

@@ -132,6 +132,7 @@ void avfilter_register_all(void)
REGISTER_FILTER(DRAWTEXT, drawtext, vf);
REGISTER_FILTER(EDGEDETECT, edgedetect, vf);
REGISTER_FILTER(ELBG, elbg, vf);
REGISTER_FILTER(EQ, eq, vf);
REGISTER_FILTER(EXTRACTPLANES, extractplanes, vf);
REGISTER_FILTER(FADE, fade, vf);
REGISTER_FILTER(FIELD, field, vf);


+ 2
- 2
libavfilter/version.h View File

@@ -30,8 +30,8 @@
#include "libavutil/version.h"

#define LIBAVFILTER_VERSION_MAJOR 5
#define LIBAVFILTER_VERSION_MINOR 8
#define LIBAVFILTER_VERSION_MICRO 101
#define LIBAVFILTER_VERSION_MINOR 9
#define LIBAVFILTER_VERSION_MICRO 100

#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
LIBAVFILTER_VERSION_MINOR, \


+ 270
- 0
libavfilter/vf_eq.c View File

@@ -0,0 +1,270 @@
/*
* 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.
*/

/**
* @file
* very simple video equalizer
*/

/**
* TODO:
* - Add support to process_command
*/

#include "libavfilter/internal.h"
#include "libavutil/common.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "vf_eq.h"

static void create_lut(EQParameters *param)
{
int i;
double g = 1.0 / param->gamma;
double lw = 1.0 - param->gamma_weight;

for (i = 0; i < 256; i++) {
double v = i / 255.0;
v = param->contrast * (v - 0.5) + 0.5 + param->brightness;

if (v <= 0.0) {
param->lut[i] = 0;
} else {
v = v * lw + pow(v, g) * param->gamma_weight;

if (v >= 1.0)
param->lut[i] = 255;
else
param->lut[i] = 256.0 * v;
}
}

param->lut_clean = 1;
}

static void apply_lut(EQParameters *param, uint8_t *dst, int dst_stride,
uint8_t *src, int src_stride, int w, int h)
{
int x, y;

if (!param->lut_clean)
create_lut(param);

for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
dst[y * dst_stride + x] = param->lut[src[y * src_stride + x]];
}
}
}

static void process_c(EQParameters *param, uint8_t *dst, int dst_stride,
uint8_t *src, int src_stride, int w, int h)
{
int x, y, pel;

int contrast = (int) (param->contrast * 256 * 16);
int brightness = ((int) (100.0 * param->brightness + 100.0) * 511) / 200 - 128 - contrast / 32;

for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
pel = ((src[y * src_stride + x] * contrast) >> 12) + brightness;

if (pel & 768)
pel = (-pel) >> 31;

dst[y * dst_stride + x] = pel;
}
}
}

static void check_values(EQParameters *param, EQContext *eq)
{
if (param->contrast == 1.0 && param->brightness == 0.0 && param->gamma == 1.0)
param->adjust = NULL;
else if (param->gamma == 1.0)
param->adjust = eq->process;
else
param->adjust = apply_lut;
}

static void set_contrast(EQContext *eq)
{
eq->param[0].contrast = eq->contrast;
eq->param[0].lut_clean = 0;
check_values(&eq->param[0], eq);
}

static void set_brightness(EQContext *eq)
{
eq->param[0].brightness = eq->brightness;
eq->param[0].lut_clean = 0;
check_values(&eq->param[0], eq);
}

static void set_gamma(EQContext *eq)
{
int i;
eq->param[0].gamma = eq->gamma * eq->gamma_g;
eq->param[1].gamma = sqrt(eq->gamma_b / eq->gamma_g);
eq->param[2].gamma = sqrt(eq->gamma_r / eq->gamma_g);

for (i = 0; i < 3; i++) {
eq->param[i].gamma_weight = eq->gamma_weight;
eq->param[i].lut_clean = 0;
check_values(&eq->param[i], eq);
}
}

static void set_saturation(EQContext *eq)
{
int i;
for (i = 1; i < 3; i++) {
eq->param[i].contrast = eq->saturation;
eq->param[i].lut_clean = 0;
check_values(&eq->param[i], eq);
}
}

static int initialize(AVFilterContext *ctx)
{
EQContext *eq = ctx->priv;

eq->process = process_c;

if (ARCH_X86)
ff_eq_init_x86(eq);

set_gamma(eq);
set_contrast(eq);
set_brightness(eq);
set_saturation(eq);

return 0;
}

static int query_formats(AVFilterContext *ctx)
{
static const enum AVPixelFormat pixel_fmts_eq[] = {
AV_PIX_FMT_GRAY8,
AV_PIX_FMT_YUV410P,
AV_PIX_FMT_YUV411P,
AV_PIX_FMT_YUV420P,
AV_PIX_FMT_YUV422P,
AV_PIX_FMT_YUV444P,
AV_PIX_FMT_NONE
};

ff_set_common_formats(ctx, ff_make_format_list(pixel_fmts_eq));

return 0;
}

static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = inlink->dst->outputs[0];
EQContext *eq = ctx->priv;
AVFrame *out;
const AVPixFmtDescriptor *desc;
int i;

out = ff_get_video_buffer(outlink, inlink->w, inlink->h);
if (!out)
return AVERROR(ENOMEM);

av_frame_copy_props(out, in);
desc = av_pix_fmt_desc_get(inlink->format);

for (i = 0; i < desc->nb_components; i++) {
int w = inlink->w;
int h = inlink->h;

if (i == 1 || i == 2) {
w = FF_CEIL_RSHIFT(w, desc->log2_chroma_w);
h = FF_CEIL_RSHIFT(h, desc->log2_chroma_h);
}

if (eq->param[i].adjust)
eq->param[i].adjust(&eq->param[i], out->data[i], out->linesize[i],
in->data[i], in->linesize[i], w, h);
else
av_image_copy_plane(out->data[i], out->linesize[i],
in->data[i], in->linesize[i], w, h);
}

return ff_filter_frame(outlink, out);
}
static const AVFilterPad eq_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
},
{ NULL }
};

static const AVFilterPad eq_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
{ NULL }
};

#define OFFSET(x) offsetof(EQContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

static const AVOption eq_options[] = {
{ "contrast", "set the contrast adjustment, negative values give a negative image",
OFFSET(contrast), AV_OPT_TYPE_DOUBLE, {.dbl = 1.0}, -2.0, 2.0, FLAGS },
{ "brightness", "set the brightness adjustment",
OFFSET(brightness), AV_OPT_TYPE_DOUBLE, {.dbl = 0.0}, -1.0, 1.0, FLAGS },
{ "saturation", "set the saturation adjustment",
OFFSET(saturation), AV_OPT_TYPE_DOUBLE, {.dbl = 1.0}, 0.0, 3.0, FLAGS },
{ "gamma", "set the initial gamma value",
OFFSET(gamma), AV_OPT_TYPE_DOUBLE, {.dbl = 1.0}, 0.1, 10.0, FLAGS },
{ "gamma_r", "gamma value for red",
OFFSET(gamma_r), AV_OPT_TYPE_DOUBLE, {.dbl = 1.0}, 0.1, 10.0, FLAGS },
{ "gamma_g", "gamma value for green",
OFFSET(gamma_g), AV_OPT_TYPE_DOUBLE, {.dbl = 1.0}, 0.1, 10.0, FLAGS },
{ "gamma_b", "gamma value for blue",
OFFSET(gamma_b), AV_OPT_TYPE_DOUBLE, {.dbl = 1.0}, 0.1, 10.0, FLAGS },
{ "gamma_weight", "set the gamma weight which reduces the effect of gamma on bright areas",
OFFSET(gamma_weight), AV_OPT_TYPE_DOUBLE, {.dbl = 1.0}, 0.0, 1.0, FLAGS },
{ NULL }
};

AVFILTER_DEFINE_CLASS(eq);

AVFilter ff_vf_eq = {
.name = "eq",
.description = NULL_IF_CONFIG_SMALL("Adjust brightness, contrast, gamma, and saturation."),
.priv_size = sizeof(EQContext),
.priv_class = &eq_class,
.inputs = eq_inputs,
.outputs = eq_outputs,
.query_formats = query_formats,
.init = initialize,
};

+ 60
- 0
libavfilter/vf_eq.h View File

@@ -0,0 +1,60 @@
/*
* 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"

typedef struct EQParameters {
void (*adjust)(struct EQParameters *eq, uint8_t *dst, int dst_stride,
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 {
const AVClass *class;

EQParameters param[3];

double contrast;
double brightness;
double saturation;

double gamma;
double gamma_weight;
double gamma_r, gamma_g, gamma_b;

void (*process)(struct EQParameters *par, uint8_t *dst, int dst_stride,
uint8_t *src, int src_stride, int w, int h);

} EQContext;

void ff_eq_init_x86(EQContext *eq);

#endif /* AVFILTER_EQ_H */

+ 1
- 0
libavfilter/x86/Makefile View File

@@ -1,3 +1,4 @@
OBJS-$(CONFIG_EQ_FILTER) += x86/vf_eq.o
OBJS-$(CONFIG_FSPP_FILTER) += x86/vf_fspp_init.o
OBJS-$(CONFIG_GRADFUN_FILTER) += x86/vf_gradfun_init.o
OBJS-$(CONFIG_HQDN3D_FILTER) += x86/vf_hqdn3d_init.o


+ 96
- 0
libavfilter/x86/vf_eq.c View File

@@ -0,0 +1,96 @@
/*
*
* Original MPlayer filters by Richard Felker.
*
* 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.
*/

#include "libavutil/attributes.h"
#include "libavutil/cpu.h"
#include "libavutil/mem.h"
#include "libavutil/x86/asm.h"
#include "libavfilter/vf_eq.h"

#if HAVE_MMX_INLINE && HAVE_6REGS
static void process_MMX(EQParameters *param, uint8_t *dst, int dst_stride,
uint8_t *src, int src_stride, int w, int h)
{
int i;
int pel;
int dstep = dst_stride - w;
int sstep = src_stride - w;
short brvec[4];
short contvec[4];
int contrast = (int) (param->contrast * 256 * 16);
int brightness = ((int) (100.0 * param->brightness + 100.0) * 511) / 200 - 128 - contrast / 32;

brvec[0] = brvec[1] = brvec[2] = brvec[3] = brightness;
contvec[0] = contvec[1] = contvec[2] = contvec[3] = contrast;

while (h--) {
__asm__ volatile (
"movq (%5), %%mm3 \n\t"
"movq (%6), %%mm4 \n\t"
"pxor %%mm0, %%mm0 \n\t"
"movl %4, %%eax \n\t"
".p2align 4 \n\t"
"1: \n\t"
"movq (%0), %%mm1 \n\t"
"movq (%0), %%mm2 \n\t"
"punpcklbw %%mm0, %%mm1\n\t"
"punpckhbw %%mm0, %%mm2\n\t"
"psllw $4, %%mm1 \n\t"
"psllw $4, %%mm2 \n\t"
"pmulhw %%mm4, %%mm1 \n\t"
"pmulhw %%mm4, %%mm2 \n\t"
"paddw %%mm3, %%mm1 \n\t"
"paddw %%mm3, %%mm2 \n\t"
"packuswb %%mm2, %%mm1 \n\t"
"add $8, %0 \n\t"
"movq %%mm1, (%1) \n\t"
"add $8, %1 \n\t"
"decl %%eax \n\t"
"jnz 1b \n\t"
: "=r" (src), "=r" (dst)
: "0" (src), "1" (dst), "r" (w>>3), "r" (brvec), "r" (contvec)
: "%eax"
);

for (i = w&7; i; i--) {
pel = ((*src++ * contrast) >> 12) + brightness;
if (pel & 768)
pel = (-pel) >> 31;
*dst++ = pel;
}

src += sstep;
dst += dstep;
}
__asm__ volatile ( "emms \n\t" ::: "memory" );
}
#endif

av_cold void ff_eq_init_x86(EQContext *eq)
{
#if HAVE_MMX_INLINE && HAVE_6REGS
int cpu_flags = av_get_cpu_flags();

if (cpu_flags & AV_CPU_FLAG_MMX) {
eq->process = process_MMX;
}
#endif
}

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