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avfilter: add colorcontrast filter
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@ -61,6 +61,7 @@ version <next>:
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- shear filter
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- kirsch filter
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- colortemperature filter
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- colorcontrast filter
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version 4.3:
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@ -8026,6 +8026,36 @@ colorbalance=rs=.3
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This filter supports the all above options as @ref{commands}.
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@section colorcontrast
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Adjust color contrast between RGB components.
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The filter accepts the following options:
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@table @option
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@item rc
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Set the red-cyan contrast. Defaults is 0.0. Allowed range is from -1.0 to 1.0.
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@item gm
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Set the green-magenta contrast. Defaults is 0.0. Allowed range is from -1.0 to 1.0.
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@item by
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Set the blue-yellow contrast. Defaults is 0.0. Allowed range is from -1.0 to 1.0.
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@item rcw
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@item gmw
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@item byw
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Set the weight of each @code{rc}, @code{gm}, @code{by} option value. Default value is 0.0.
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Allowed range is from 0.0 to 1.0. If all weights are 0.0 filtering is disabled.
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@item pl
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Set the amount of preserving lightness. Default value is 0.0. Allowed range is from 0.0 to 1.0.
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@end table
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@subsection Commands
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This filter supports the all above options as @ref{commands}.
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@section colorchannelmixer
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Adjust video input frames by re-mixing color channels.
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@ -196,6 +196,7 @@ OBJS-$(CONFIG_CIESCOPE_FILTER) += vf_ciescope.o
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OBJS-$(CONFIG_CODECVIEW_FILTER) += vf_codecview.o qp_table.o
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OBJS-$(CONFIG_COLORBALANCE_FILTER) += vf_colorbalance.o
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OBJS-$(CONFIG_COLORCHANNELMIXER_FILTER) += vf_colorchannelmixer.o
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OBJS-$(CONFIG_COLORCONTRAST_FILTER) += vf_colorcontrast.o
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OBJS-$(CONFIG_COLORKEY_FILTER) += vf_colorkey.o
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OBJS-$(CONFIG_COLORKEY_OPENCL_FILTER) += vf_colorkey_opencl.o opencl.o \
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opencl/colorkey.o
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@ -186,6 +186,7 @@ extern AVFilter ff_vf_ciescope;
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extern AVFilter ff_vf_codecview;
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extern AVFilter ff_vf_colorbalance;
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extern AVFilter ff_vf_colorchannelmixer;
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extern AVFilter ff_vf_colorcontrast;
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extern AVFilter ff_vf_colorkey;
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extern AVFilter ff_vf_colorkey_opencl;
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extern AVFilter ff_vf_colorhold;
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@ -30,7 +30,7 @@
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#include "libavutil/version.h"
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#define LIBAVFILTER_VERSION_MAJOR 7
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#define LIBAVFILTER_VERSION_MINOR 100
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#define LIBAVFILTER_VERSION_MINOR 101
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#define LIBAVFILTER_VERSION_MICRO 100
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408
libavfilter/vf_colorcontrast.c
Normal file
408
libavfilter/vf_colorcontrast.c
Normal file
@ -0,0 +1,408 @@
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/*
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* Copyright (c) 2021 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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#include <float.h>
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#include "libavutil/opt.h"
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#include "libavutil/imgutils.h"
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#include "avfilter.h"
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#include "drawutils.h"
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#include "formats.h"
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#include "internal.h"
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#include "video.h"
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#define R 0
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#define G 1
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#define B 2
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typedef struct ColorContrastContext {
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const AVClass *class;
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float rc, gm, by;
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float rcw, gmw, byw;
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float preserve;
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int step;
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int depth;
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uint8_t rgba_map[4];
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int (*do_slice)(AVFilterContext *s, void *arg,
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int jobnr, int nb_jobs);
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} ColorContrastContext;
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static inline float lerpf(float v0, float v1, float f)
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{
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return v0 + (v1 - v0) * f;
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}
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#define PROCESS(max) \
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br = (b + r) * 0.5f; \
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gb = (g + b) * 0.5f; \
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rg = (r + g) * 0.5f; \
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\
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gd = g - br; \
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bd = b - rg; \
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rd = r - gb; \
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\
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g0 = g + gd * gm; \
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b0 = b - gd * gm; \
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r0 = r - gd * gm; \
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\
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g1 = g - bd * by; \
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b1 = b + bd * by; \
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r1 = r - bd * by; \
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\
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g2 = g - rd * rc; \
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b2 = b - rd * rc; \
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r2 = r + rd * rc; \
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\
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ng = av_clipf((g0 * gmw + g1 * byw + g2 * rcw) * scale, 0.f, max); \
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nb = av_clipf((b0 * gmw + b1 * byw + b2 * rcw) * scale, 0.f, max); \
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nr = av_clipf((r0 * gmw + r1 * byw + r2 * rcw) * scale, 0.f, max); \
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\
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li = FFMAX3(r, g, b) + FFMIN3(r, g, b); \
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lo = FFMAX3(nr, ng, nb) + FFMIN3(nr, ng, nb) + FLT_EPSILON; \
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lf = li / lo; \
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\
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r = nr * lf; \
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g = ng * lf; \
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b = nb * lf; \
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\
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nr = lerpf(nr, r, preserve); \
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ng = lerpf(ng, g, preserve); \
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nb = lerpf(nb, b, preserve);
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static int colorcontrast_slice8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
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{
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ColorContrastContext *s = ctx->priv;
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AVFrame *frame = arg;
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const int width = frame->width;
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const int height = frame->height;
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const int slice_start = (height * jobnr) / nb_jobs;
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const int slice_end = (height * (jobnr + 1)) / nb_jobs;
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const int glinesize = frame->linesize[0];
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const int blinesize = frame->linesize[1];
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const int rlinesize = frame->linesize[2];
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uint8_t *gptr = frame->data[0] + slice_start * glinesize;
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uint8_t *bptr = frame->data[1] + slice_start * blinesize;
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uint8_t *rptr = frame->data[2] + slice_start * rlinesize;
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const float preserve = s->preserve;
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const float gm = s->gm * 0.5f;
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const float by = s->by * 0.5f;
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const float rc = s->rc * 0.5f;
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const float gmw = s->gmw;
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const float byw = s->byw;
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const float rcw = s->rcw;
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const float sum = gmw + byw + rcw;
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const float scale = 1.f / sum;
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for (int y = slice_start; y < slice_end && sum > FLT_EPSILON; y++) {
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for (int x = 0; x < width; x++) {
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float g = gptr[x];
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float b = bptr[x];
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float r = rptr[x];
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float g0, g1, g2;
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float b0, b1, b2;
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float r0, r1, r2;
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float gd, bd, rd;
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float gb, br, rg;
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float nr, ng, nb;
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float li, lo, lf;
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PROCESS(255.f);
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gptr[x] = av_clip_uint8(ng);
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bptr[x] = av_clip_uint8(nb);
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rptr[x] = av_clip_uint8(nr);
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}
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gptr += glinesize;
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bptr += blinesize;
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rptr += rlinesize;
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}
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return 0;
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}
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static int colorcontrast_slice16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
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{
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ColorContrastContext *s = ctx->priv;
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AVFrame *frame = arg;
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const int depth = s->depth;
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const float max = (1 << depth) - 1;
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const int width = frame->width;
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const int height = frame->height;
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const int slice_start = (height * jobnr) / nb_jobs;
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const int slice_end = (height * (jobnr + 1)) / nb_jobs;
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const int glinesize = frame->linesize[0] / 2;
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const int blinesize = frame->linesize[1] / 2;
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const int rlinesize = frame->linesize[2] / 2;
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uint16_t *gptr = (uint16_t *)frame->data[0] + slice_start * glinesize;
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uint16_t *bptr = (uint16_t *)frame->data[1] + slice_start * blinesize;
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uint16_t *rptr = (uint16_t *)frame->data[2] + slice_start * rlinesize;
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const float preserve = s->preserve;
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const float gm = s->gm * 0.5f;
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const float by = s->by * 0.5f;
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const float rc = s->rc * 0.5f;
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const float gmw = s->gmw;
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const float byw = s->byw;
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const float rcw = s->rcw;
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const float sum = gmw + byw + rcw;
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const float scale = 1.f / sum;
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for (int y = slice_start; y < slice_end && sum > FLT_EPSILON; y++) {
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for (int x = 0; x < width; x++) {
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float g = gptr[x];
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float b = bptr[x];
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float r = rptr[x];
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float g0, g1, g2;
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float b0, b1, b2;
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float r0, r1, r2;
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float gd, bd, rd;
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float gb, br, rg;
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float nr, ng, nb;
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float li, lo, lf;
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PROCESS(max);
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gptr[x] = av_clip_uintp2_c(ng, depth);
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bptr[x] = av_clip_uintp2_c(nb, depth);
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rptr[x] = av_clip_uintp2_c(nr, depth);
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}
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gptr += glinesize;
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bptr += blinesize;
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rptr += rlinesize;
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}
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return 0;
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}
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static int colorcontrast_slice8p(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
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{
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ColorContrastContext *s = ctx->priv;
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AVFrame *frame = arg;
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const int step = s->step;
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const int width = frame->width;
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const int height = frame->height;
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const int slice_start = (height * jobnr) / nb_jobs;
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const int slice_end = (height * (jobnr + 1)) / nb_jobs;
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const int linesize = frame->linesize[0];
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const uint8_t roffset = s->rgba_map[R];
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const uint8_t goffset = s->rgba_map[G];
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const uint8_t boffset = s->rgba_map[B];
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uint8_t *ptr = frame->data[0] + slice_start * linesize;
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const float preserve = s->preserve;
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const float gm = s->gm * 0.5f;
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const float by = s->by * 0.5f;
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const float rc = s->rc * 0.5f;
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const float gmw = s->gmw;
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const float byw = s->byw;
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const float rcw = s->rcw;
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const float sum = gmw + byw + rcw;
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const float scale = 1.f / sum;
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for (int y = slice_start; y < slice_end && sum > FLT_EPSILON; y++) {
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for (int x = 0; x < width; x++) {
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float g = ptr[x * step + goffset];
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float b = ptr[x * step + boffset];
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float r = ptr[x * step + roffset];
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float g0, g1, g2;
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float b0, b1, b2;
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float r0, r1, r2;
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float gd, bd, rd;
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float gb, br, rg;
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float nr, ng, nb;
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float li, lo, lf;
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PROCESS(255.f);
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ptr[x * step + goffset] = av_clip_uint8(ng);
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ptr[x * step + boffset] = av_clip_uint8(nb);
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ptr[x * step + roffset] = av_clip_uint8(nr);
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}
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ptr += linesize;
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}
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return 0;
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}
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static int colorcontrast_slice16p(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
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{
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ColorContrastContext *s = ctx->priv;
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AVFrame *frame = arg;
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const int step = s->step;
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const int depth = s->depth;
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const float max = (1 << depth) - 1;
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const int width = frame->width;
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const int height = frame->height;
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const int slice_start = (height * jobnr) / nb_jobs;
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const int slice_end = (height * (jobnr + 1)) / nb_jobs;
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const int linesize = frame->linesize[0] / 2;
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const uint8_t roffset = s->rgba_map[R];
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const uint8_t goffset = s->rgba_map[G];
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const uint8_t boffset = s->rgba_map[B];
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uint16_t *ptr = (uint16_t *)frame->data[0] + slice_start * linesize;
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const float preserve = s->preserve;
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const float gm = s->gm * 0.5f;
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const float by = s->by * 0.5f;
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const float rc = s->rc * 0.5f;
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const float gmw = s->gmw;
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const float byw = s->byw;
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const float rcw = s->rcw;
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const float sum = gmw + byw + rcw;
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const float scale = 1.f / sum;
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for (int y = slice_start; y < slice_end && sum > FLT_EPSILON; y++) {
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for (int x = 0; x < width; x++) {
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float g = ptr[x * step + goffset];
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float b = ptr[x * step + boffset];
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float r = ptr[x * step + roffset];
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float g0, g1, g2;
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float b0, b1, b2;
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float r0, r1, r2;
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float gd, bd, rd;
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float gb, br, rg;
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float nr, ng, nb;
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float li, lo, lf;
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PROCESS(max);
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ptr[x * step + goffset] = av_clip_uintp2_c(ng, depth);
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ptr[x * step + boffset] = av_clip_uintp2_c(nb, depth);
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ptr[x * step + roffset] = av_clip_uintp2_c(nr, depth);
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}
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ptr += linesize;
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}
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return 0;
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}
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static int filter_frame(AVFilterLink *link, AVFrame *frame)
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{
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AVFilterContext *ctx = link->dst;
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ColorContrastContext *s = ctx->priv;
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int res;
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if (res = ctx->internal->execute(ctx, s->do_slice, frame, NULL,
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FFMIN(frame->height, ff_filter_get_nb_threads(ctx))))
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return res;
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return ff_filter_frame(ctx->outputs[0], frame);
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}
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static av_cold int query_formats(AVFilterContext *ctx)
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{
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static const enum AVPixelFormat pixel_fmts[] = {
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AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
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AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
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AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
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AV_PIX_FMT_0RGB, AV_PIX_FMT_0BGR,
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AV_PIX_FMT_RGB0, AV_PIX_FMT_BGR0,
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AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP,
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AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP12,
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AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
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AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
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AV_PIX_FMT_RGB48, AV_PIX_FMT_BGR48,
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AV_PIX_FMT_RGBA64, AV_PIX_FMT_BGRA64,
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AV_PIX_FMT_NONE
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};
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AVFilterFormats *formats = NULL;
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formats = ff_make_format_list(pixel_fmts);
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if (!formats)
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return AVERROR(ENOMEM);
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return ff_set_common_formats(ctx, formats);
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}
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static av_cold int config_input(AVFilterLink *inlink)
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{
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AVFilterContext *ctx = inlink->dst;
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ColorContrastContext *s = ctx->priv;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
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int planar = desc->flags & AV_PIX_FMT_FLAG_PLANAR;
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s->step = desc->nb_components;
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if (inlink->format == AV_PIX_FMT_RGB0 ||
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inlink->format == AV_PIX_FMT_0RGB ||
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inlink->format == AV_PIX_FMT_BGR0 ||
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inlink->format == AV_PIX_FMT_0BGR)
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s->step = 4;
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s->depth = desc->comp[0].depth;
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s->do_slice = s->depth <= 8 ? colorcontrast_slice8 : colorcontrast_slice16;
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if (!planar)
|
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s->do_slice = s->depth <= 8 ? colorcontrast_slice8p : colorcontrast_slice16p;
|
||||
|
||||
ff_fill_rgba_map(s->rgba_map, inlink->format);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const AVFilterPad colorcontrast_inputs[] = {
|
||||
{
|
||||
.name = "default",
|
||||
.type = AVMEDIA_TYPE_VIDEO,
|
||||
.needs_writable = 1,
|
||||
.filter_frame = filter_frame,
|
||||
.config_props = config_input,
|
||||
},
|
||||
{ NULL }
|
||||
};
|
||||
|
||||
static const AVFilterPad colorcontrast_outputs[] = {
|
||||
{
|
||||
.name = "default",
|
||||
.type = AVMEDIA_TYPE_VIDEO,
|
||||
},
|
||||
{ NULL }
|
||||
};
|
||||
|
||||
#define OFFSET(x) offsetof(ColorContrastContext, x)
|
||||
#define VF AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
|
||||
|
||||
static const AVOption colorcontrast_options[] = {
|
||||
{ "rc", "set the red-cyan contrast", OFFSET(rc), AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, VF },
|
||||
{ "gm", "set the green-magenta contrast", OFFSET(gm), AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, VF },
|
||||
{ "by", "set the blue-yellow contrast", OFFSET(by), AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, VF },
|
||||
{ "rcw", "set the red-cyan weight", OFFSET(rcw), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 1, VF },
|
||||
{ "gmw", "set the green-magenta weight", OFFSET(gmw), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 1, VF },
|
||||
{ "byw", "set the blue-yellow weight", OFFSET(byw), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 1, VF },
|
||||
{ "pl", "set the amount of preserving lightness", OFFSET(preserve), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 1, VF },
|
||||
{ NULL }
|
||||
};
|
||||
|
||||
AVFILTER_DEFINE_CLASS(colorcontrast);
|
||||
|
||||
AVFilter ff_vf_colorcontrast = {
|
||||
.name = "colorcontrast",
|
||||
.description = NULL_IF_CONFIG_SMALL("Adjust color contrast between RGB components."),
|
||||
.priv_size = sizeof(ColorContrastContext),
|
||||
.priv_class = &colorcontrast_class,
|
||||
.query_formats = query_formats,
|
||||
.inputs = colorcontrast_inputs,
|
||||
.outputs = colorcontrast_outputs,
|
||||
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
|
||||
.process_command = ff_filter_process_command,
|
||||
};
|
Loading…
Reference in New Issue
Block a user