mirror of https://git.ffmpeg.org/ffmpeg.git
218 lines
7.3 KiB
C
218 lines
7.3 KiB
C
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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 "formats.h"
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#include "internal.h"
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#include "video.h"
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typedef struct ColorCorrectContext {
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const AVClass *class;
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float rl, bl;
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float rh, bh;
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float saturation;
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int depth;
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int (*do_slice)(AVFilterContext *s, void *arg,
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int jobnr, int nb_jobs);
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} ColorCorrectContext;
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#define PROCESS() \
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float y = yptr[x] * imax; \
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float u = uptr[x] * imax - .5f; \
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float v = vptr[x] * imax - .5f; \
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float ny, nu, nv; \
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\
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ny = y; \
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nu = saturation * (u + y * bd + bl); \
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nv = saturation * (v + y * rd + rl);
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static int colorcorrect_slice8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
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{
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ColorCorrectContext *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 float imax = 1.f / max;
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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 ylinesize = frame->linesize[0];
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const int ulinesize = frame->linesize[1];
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const int vlinesize = frame->linesize[2];
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uint8_t *yptr = frame->data[0] + slice_start * ylinesize;
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uint8_t *uptr = frame->data[1] + slice_start * ulinesize;
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uint8_t *vptr = frame->data[2] + slice_start * vlinesize;
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const float saturation = s->saturation;
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const float bl = s->bl;
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const float rl = s->rl;
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const float bd = s->bh - bl;
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const float rd = s->rh - rl;
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for (int y = slice_start; y < slice_end; y++) {
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for (int x = 0; x < width; x++) {
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PROCESS()
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yptr[x] = av_clip_uint8( ny * max);
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uptr[x] = av_clip_uint8((nu + 0.5f) * max);
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vptr[x] = av_clip_uint8((nv + 0.5f) * max);
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}
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yptr += ylinesize;
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uptr += ulinesize;
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vptr += vlinesize;
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}
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return 0;
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}
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static int colorcorrect_slice16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
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{
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ColorCorrectContext *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 float imax = 1.f / max;
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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 ylinesize = frame->linesize[0] / 2;
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const int ulinesize = frame->linesize[1] / 2;
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const int vlinesize = frame->linesize[2] / 2;
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uint16_t *yptr = (uint16_t *)frame->data[0] + slice_start * ylinesize;
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uint16_t *uptr = (uint16_t *)frame->data[1] + slice_start * ulinesize;
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uint16_t *vptr = (uint16_t *)frame->data[2] + slice_start * vlinesize;
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const float saturation = s->saturation;
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const float bl = s->bl;
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const float rl = s->rl;
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const float bd = s->bh - bl;
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const float rd = s->rh - rl;
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for (int y = slice_start; y < slice_end; y++) {
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for (int x = 0; x < width; x++) {
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PROCESS()
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yptr[x] = av_clip_uintp2_c( ny * max, depth);
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uptr[x] = av_clip_uintp2_c((nu + 0.5f) * max, depth);
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vptr[x] = av_clip_uintp2_c((nv + 0.5f) * max, depth);
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}
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yptr += ylinesize;
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uptr += ulinesize;
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vptr += vlinesize;
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}
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return 0;
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}
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static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
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{
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AVFilterContext *ctx = inlink->dst;
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ColorCorrectContext *s = ctx->priv;
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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 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_YUV444P, AV_PIX_FMT_YUVJ444P,
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AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV444P16,
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AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA444P16,
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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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ColorCorrectContext *s = ctx->priv;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
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s->depth = desc->comp[0].depth;
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s->do_slice = s->depth <= 8 ? colorcorrect_slice8 : colorcorrect_slice16;
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return 0;
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}
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static const AVFilterPad colorcorrect_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.needs_writable = 1,
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.filter_frame = filter_frame,
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.config_props = config_input,
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},
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{ NULL }
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};
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static const AVFilterPad colorcorrect_outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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},
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{ NULL }
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};
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#define OFFSET(x) offsetof(ColorCorrectContext, x)
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#define VF AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
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static const AVOption colorcorrect_options[] = {
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{ "rl", "set the red shadow spot", OFFSET(rl), AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, VF },
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{ "bl", "set the blue shadow spot", OFFSET(bl), AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, VF },
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{ "rh", "set the red highlight spot", OFFSET(rh), AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, VF },
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{ "bh", "set the blue highlight spot", OFFSET(bh), AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, VF },
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{ "saturation", "set the amount of saturation", OFFSET(saturation), AV_OPT_TYPE_FLOAT, {.dbl=1}, -3, 3, VF },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(colorcorrect);
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AVFilter ff_vf_colorcorrect = {
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.name = "colorcorrect",
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.description = NULL_IF_CONFIG_SMALL("Adjust color white balance selectively for blacks and whites."),
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.priv_size = sizeof(ColorCorrectContext),
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.priv_class = &colorcorrect_class,
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.query_formats = query_formats,
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.inputs = colorcorrect_inputs,
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.outputs = colorcorrect_outputs,
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
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.process_command = ff_filter_process_command,
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};
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