libavfilter/vf_chromanr.c - manifest_repos/ffmpeg - Git at Google

 /*
  * Copyright (c) 2020 Paul B Mahol
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 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
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser 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/avstring.h"
 #include "libavutil/imgutils.h"
 #include "libavutil/opt.h"
 #include "libavutil/pixdesc.h"

 #include "avfilter.h"
 #include "formats.h"
 #include "internal.h"
 #include "video.h"

 typedef struct ChromaNRContext {
     const AVClass *class;

     float threshold;
     float threshold_y;
     float threshold_u;
     float threshold_v;
     int thres;
     int thres_y;
     int thres_u;
     int thres_v;
     int sizew;
     int sizeh;
     int stepw;
     int steph;
     int depth;
     int chroma_w;
     int chroma_h;
     int nb_planes;
     int linesize[4];
     int planeheight[4];
     int planewidth[4];

     AVFrame *out;
     int (*filter_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
 } ChromaNRContext;

 static int query_formats(AVFilterContext *ctx)
 {
     static const enum AVPixelFormat pix_fmts[] = {
         AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV444P,
         AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
         AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,
         AV_PIX_FMT_YUV420P9,   AV_PIX_FMT_YUV422P9,   AV_PIX_FMT_YUV444P9,
         AV_PIX_FMT_YUV420P10,  AV_PIX_FMT_YUV422P10,  AV_PIX_FMT_YUV440P10, AV_PIX_FMT_YUV444P10,
         AV_PIX_FMT_YUV444P12,  AV_PIX_FMT_YUV422P12,  AV_PIX_FMT_YUV440P12, AV_PIX_FMT_YUV420P12,
         AV_PIX_FMT_YUV444P14,  AV_PIX_FMT_YUV422P14,  AV_PIX_FMT_YUV420P14,
         AV_PIX_FMT_YUV420P16,  AV_PIX_FMT_YUV422P16,  AV_PIX_FMT_YUV444P16,
         AV_PIX_FMT_YUVA420P9,  AV_PIX_FMT_YUVA422P9,  AV_PIX_FMT_YUVA444P9,
         AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
         AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
         AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
         AV_PIX_FMT_NONE
     };

     AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
     if (!fmts_list)
         return AVERROR(ENOMEM);
     return ff_set_common_formats(ctx, fmts_list);
 }

 #define FILTER_FUNC(name, type)                                                        \
 static int filter_slice##name(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)   \
 {                                                                                        \
     ChromaNRContext *s = ctx->priv;                                                      \
     AVFrame *in = arg;                                                                   \
     AVFrame *out = s->out;                                                               \
     const int in_ylinesize = in->linesize[0];                                            \
     const int in_ulinesize = in->linesize[1];                                            \
     const int in_vlinesize = in->linesize[2];                                            \
     const int out_ulinesize = out->linesize[1];                                          \
     const int out_vlinesize = out->linesize[2];                                          \
     const int chroma_w = s->chroma_w;                                                    \
     const int chroma_h = s->chroma_h;                                                    \
     const int stepw = s->stepw;                                                          \
     const int steph = s->steph;                                                          \
     const int sizew = s->sizew;                                                          \
     const int sizeh = s->sizeh;                                                          \
     const int thres = s->thres;                                                          \
     const int thres_y = s->thres_y;                                                      \
     const int thres_u = s->thres_u;                                                      \
     const int thres_v = s->thres_v;                                                      \
     const int h = s->planeheight[1];                                                     \
     const int w = s->planewidth[1];                                                      \
     const int slice_start = (h * jobnr) / nb_jobs;                                       \
     const int slice_end = (h * (jobnr+1)) / nb_jobs;                                     \
     type *out_uptr = (type *)(out->data[1] + slice_start * out_ulinesize);               \
     type *out_vptr = (type *)(out->data[2] + slice_start * out_vlinesize);               \
                                                                                          \
     {                                                                                    \
         const int h = s->planeheight[0];                                                 \
         const int slice_start = (h * jobnr) / nb_jobs;                                   \
         const int slice_end = (h * (jobnr+1)) / nb_jobs;                                 \
                                                                                          \
         av_image_copy_plane(out->data[0] + slice_start * out->linesize[0],               \
                             out->linesize[0],                                            \
                             in->data[0] + slice_start * in->linesize[0],                 \
                             in->linesize[0],                                             \
                             s->linesize[0], slice_end - slice_start);                    \
                                                                                          \
         if (s->nb_planes == 4) {                                                         \
             av_image_copy_plane(out->data[3] + slice_start * out->linesize[3],           \
                                 out->linesize[3],                                        \
                                 in->data[3] + slice_start * in->linesize[3],             \
                                 in->linesize[3],                                         \
                                 s->linesize[3], slice_end - slice_start);                \
         }                                                                                \
     }                                                                                    \
                                                                                          \
     for (int y = slice_start; y < slice_end; y++) {                                      \
         const type *in_yptr = (const type *)(in->data[0] + y * chroma_h * in_ylinesize); \
         const type *in_uptr = (const type *)(in->data[1] + y * in_ulinesize);            \
         const type *in_vptr = (const type *)(in->data[2] + y * in_vlinesize);            \
                                                                                          \
         for (int x = 0; x < w; x++) {                                                    \
             const int cy = in_yptr[x * chroma_w];                                        \
             const int cu = in_uptr[x];                                                   \
             const int cv = in_vptr[x];                                                   \
             int su = cu;                                                                 \
             int sv = cv;                                                                 \
             int cn = 1;                                                                  \
                                                                                          \
             for (int yy = FFMAX(0, y - sizeh); yy < FFMIN(y + sizeh, h); yy += steph) {           \
                 const type *in_yptr = (const type *)(in->data[0] + yy * chroma_h * in_ylinesize); \
                 const type *in_uptr = (const type *)(in->data[1] + yy * in_ulinesize);            \
                 const type *in_vptr = (const type *)(in->data[2] + yy * in_vlinesize);            \
                                                                                                   \
                 for (int xx = FFMAX(0, x - sizew); xx < FFMIN(x + sizew, w); xx += stepw) {       \
                     const int Y = in_yptr[xx * chroma_w];                              \
                     const int U = in_uptr[xx];                                         \
                     const int V = in_vptr[xx];                                         \
                                                                                        \
                     if (FFABS(cu - U) + FFABS(cv - V) + FFABS(cy - Y) < thres &&       \
                         FFABS(cu - U) < thres_u && FFABS(cv - V) < thres_v &&          \
                         FFABS(cy - Y) < thres_y &&                                     \
                         xx != x && yy != y) {                                          \
                         su += U;                                                       \
                         sv += V;                                                       \
                         cn++;                                                          \
                     }                                                                  \
                 }                                                                      \
             }                                                                          \
                                                                                        \
             out_uptr[x] = su / cn;                                                     \
             out_vptr[x] = sv / cn;                                                     \
         }                                                                              \
                                                                                        \
         out_uptr += out_ulinesize / sizeof(type);                                      \
         out_vptr += out_vlinesize / sizeof(type);                                      \
     }                                                                                  \
                                                                                        \
     return 0;                                                                          \
 }

 FILTER_FUNC(8,  uint8_t)
 FILTER_FUNC(16, uint16_t)

 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
 {
     AVFilterContext *ctx = inlink->dst;
     AVFilterLink *outlink = ctx->outputs[0];
     ChromaNRContext *s = ctx->priv;
     AVFrame *out;

     s->thres = s->threshold * (1 << (s->depth - 8));
     s->thres_y = s->threshold_y * (1 << (s->depth - 8));
     s->thres_u = s->threshold_u * (1 << (s->depth - 8));
     s->thres_v = s->threshold_v * (1 << (s->depth - 8));

     out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
     if (!out) {
         av_frame_free(&in);
         return AVERROR(ENOMEM);
     }

     av_frame_copy_props(out, in);
     s->out = out;
     ctx->internal->execute(ctx, s->filter_slice, in, NULL,
                            FFMIN3(s->planeheight[1],
                                   s->planeheight[2],
                                   ff_filter_get_nb_threads(ctx)));

     av_frame_free(&in);
     return ff_filter_frame(outlink, out);
 }

 static int config_input(AVFilterLink *inlink)
 {
     AVFilterContext *ctx = inlink->dst;
     ChromaNRContext *s = ctx->priv;
     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
     int ret;

     s->nb_planes = desc->nb_components;
     s->depth = desc->comp[0].depth;
     s->filter_slice = s->depth <= 8 ? filter_slice8 : filter_slice16;
     s->chroma_w = 1 << desc->log2_chroma_w;
     s->chroma_h = 1 << desc->log2_chroma_h;
     s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
     s->planeheight[0] = s->planeheight[3] = inlink->h;
     s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
     s->planewidth[0] = s->planewidth[3] = inlink->w;

     if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
         return ret;

     return 0;
 }

 #define OFFSET(x) offsetof(ChromaNRContext, x)
 #define VF AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM

 static const AVOption chromanr_options[] = {
     { "thres", "set y+u+v threshold", OFFSET(threshold), AV_OPT_TYPE_FLOAT, {.dbl=30}, 1, 200, VF },
     { "sizew", "set horizontal size", OFFSET(sizew),     AV_OPT_TYPE_INT,   {.i64=5},  1, 100, VF },
     { "sizeh", "set vertical size",   OFFSET(sizeh),     AV_OPT_TYPE_INT,   {.i64=5},  1, 100, VF },
     { "stepw", "set horizontal step", OFFSET(stepw),     AV_OPT_TYPE_INT,   {.i64=1},  1,  50, VF },
     { "steph", "set vertical step",   OFFSET(steph),     AV_OPT_TYPE_INT,   {.i64=1},  1,  50, VF },
     { "threy", "set y threshold",   OFFSET(threshold_y), AV_OPT_TYPE_FLOAT, {.dbl=200},1, 200, VF },
     { "threu", "set u threshold",   OFFSET(threshold_u), AV_OPT_TYPE_FLOAT, {.dbl=200},1, 200, VF },
     { "threv", "set v threshold",   OFFSET(threshold_v), AV_OPT_TYPE_FLOAT, {.dbl=200},1, 200, VF },
     { NULL }
 };

 static const AVFilterPad inputs[] = {
     {
         .name         = "default",
         .type         = AVMEDIA_TYPE_VIDEO,
         .filter_frame = filter_frame,
         .config_props = config_input,
     },
     { NULL }
 };

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

 AVFILTER_DEFINE_CLASS(chromanr);

 AVFilter ff_vf_chromanr = {
     .name          = "chromanr",
     .description   = NULL_IF_CONFIG_SMALL("Reduce chrominance noise."),
     .priv_size     = sizeof(ChromaNRContext),
     .priv_class    = &chromanr_class,
     .query_formats = query_formats,
     .outputs       = outputs,
     .inputs        = inputs,
     .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
     .process_command = ff_filter_process_command,
 };
	/*
	* Copyright (c) 2020 Paul B Mahol
	*
	* This file is part of FFmpeg.
	*
	* FFmpeg is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Lesser General Public
	* License as published by the Free Software Foundation; either
	* version 2.1 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
	* Lesser General Public License for more details.
	*
	* You should have received a copy of the GNU Lesser 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/avstring.h"
	#include "libavutil/imgutils.h"
	#include "libavutil/opt.h"
	#include "libavutil/pixdesc.h"

	#include "avfilter.h"
	#include "formats.h"
	#include "internal.h"
	#include "video.h"

	typedef struct ChromaNRContext {
	const AVClass *class;

	float threshold;
	float threshold_y;
	float threshold_u;
	float threshold_v;
	int thres;
	int thres_y;
	int thres_u;
	int thres_v;
	int sizew;
	int sizeh;
	int stepw;
	int steph;
	int depth;
	int chroma_w;
	int chroma_h;
	int nb_planes;
	int linesize[4];
	int planeheight[4];
	int planewidth[4];

	AVFrame *out;
	int (filter_slice)(AVFilterContext ctx, void *arg, int jobnr, int nb_jobs);
	} ChromaNRContext;

	static int query_formats(AVFilterContext *ctx)
	{
	static const enum AVPixelFormat pix_fmts[] = {
	AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV444P,
	AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
	AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,
	AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
	AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV440P10, AV_PIX_FMT_YUV444P10,
	AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV440P12, AV_PIX_FMT_YUV420P12,
	AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
	AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
	AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
	AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
	AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
	AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
	AV_PIX_FMT_NONE
	};

	AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
	if (!fmts_list)
	return AVERROR(ENOMEM);
	return ff_set_common_formats(ctx, fmts_list);
	}

	#define FILTER_FUNC(name, type) \
	static int filter_slice##name(AVFilterContext ctx, void arg, int jobnr, int nb_jobs) \
	{ \
	ChromaNRContext *s = ctx->priv; \
	AVFrame *in = arg; \
	AVFrame *out = s->out; \
	const int in_ylinesize = in->linesize[0]; \
	const int in_ulinesize = in->linesize[1]; \
	const int in_vlinesize = in->linesize[2]; \
	const int out_ulinesize = out->linesize[1]; \
	const int out_vlinesize = out->linesize[2]; \
	const int chroma_w = s->chroma_w; \
	const int chroma_h = s->chroma_h; \
	const int stepw = s->stepw; \
	const int steph = s->steph; \
	const int sizew = s->sizew; \
	const int sizeh = s->sizeh; \
	const int thres = s->thres; \
	const int thres_y = s->thres_y; \
	const int thres_u = s->thres_u; \
	const int thres_v = s->thres_v; \
	const int h = s->planeheight[1]; \
	const int w = s->planewidth[1]; \
	const int slice_start = (h * jobnr) / nb_jobs; \
	const int slice_end = (h * (jobnr+1)) / nb_jobs; \
	type out_uptr = (type )(out->data[1] + slice_start * out_ulinesize); \
	type out_vptr = (type )(out->data[2] + slice_start * out_vlinesize); \
	\
	{ \
	const int h = s->planeheight[0]; \
	const int slice_start = (h * jobnr) / nb_jobs; \
	const int slice_end = (h * (jobnr+1)) / nb_jobs; \
	\
	av_image_copy_plane(out->data[0] + slice_start * out->linesize[0], \
	out->linesize[0], \
	in->data[0] + slice_start * in->linesize[0], \
	in->linesize[0], \
	s->linesize[0], slice_end - slice_start); \
	\
	if (s->nb_planes == 4) { \
	av_image_copy_plane(out->data[3] + slice_start * out->linesize[3], \
	out->linesize[3], \
	in->data[3] + slice_start * in->linesize[3], \
	in->linesize[3], \
	s->linesize[3], slice_end - slice_start); \
	} \
	} \
	\
	for (int y = slice_start; y < slice_end; y++) { \
	const type in_yptr = (const type )(in->data[0] + y * chroma_h * in_ylinesize); \
	const type in_uptr = (const type )(in->data[1] + y * in_ulinesize); \
	const type in_vptr = (const type )(in->data[2] + y * in_vlinesize); \
	\
	for (int x = 0; x < w; x++) { \
	const int cy = in_yptr[x * chroma_w]; \
	const int cu = in_uptr[x]; \
	const int cv = in_vptr[x]; \
	int su = cu; \
	int sv = cv; \
	int cn = 1; \
	\
	for (int yy = FFMAX(0, y - sizeh); yy < FFMIN(y + sizeh, h); yy += steph) { \
	const type in_yptr = (const type )(in->data[0] + yy * chroma_h * in_ylinesize); \
	const type in_uptr = (const type )(in->data[1] + yy * in_ulinesize); \
	const type in_vptr = (const type )(in->data[2] + yy * in_vlinesize); \
	\
	for (int xx = FFMAX(0, x - sizew); xx < FFMIN(x + sizew, w); xx += stepw) { \
	const int Y = in_yptr[xx * chroma_w]; \
	const int U = in_uptr[xx]; \
	const int V = in_vptr[xx]; \
	\
	if (FFABS(cu - U) + FFABS(cv - V) + FFABS(cy - Y) < thres && \
	FFABS(cu - U) < thres_u && FFABS(cv - V) < thres_v && \
	FFABS(cy - Y) < thres_y && \
	xx != x && yy != y) { \
	su += U; \
	sv += V; \
	cn++; \
	} \
	} \
	} \
	\
	out_uptr[x] = su / cn; \
	out_vptr[x] = sv / cn; \
	} \
	\
	out_uptr += out_ulinesize / sizeof(type); \
	out_vptr += out_vlinesize / sizeof(type); \
	} \
	\
	return 0; \
	}

	FILTER_FUNC(8, uint8_t)
	FILTER_FUNC(16, uint16_t)

	static int filter_frame(AVFilterLink inlink, AVFrame in)
	{
	AVFilterContext *ctx = inlink->dst;
	AVFilterLink *outlink = ctx->outputs[0];
	ChromaNRContext *s = ctx->priv;
	AVFrame *out;

	s->thres = s->threshold * (1 << (s->depth - 8));
	s->thres_y = s->threshold_y * (1 << (s->depth - 8));
	s->thres_u = s->threshold_u * (1 << (s->depth - 8));
	s->thres_v = s->threshold_v * (1 << (s->depth - 8));

	out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
	if (!out) {
	av_frame_free(&in);
	return AVERROR(ENOMEM);
	}

	av_frame_copy_props(out, in);
	s->out = out;
	ctx->internal->execute(ctx, s->filter_slice, in, NULL,
	FFMIN3(s->planeheight[1],
	s->planeheight[2],
	ff_filter_get_nb_threads(ctx)));

	av_frame_free(&in);
	return ff_filter_frame(outlink, out);
	}

	static int config_input(AVFilterLink *inlink)
	{
	AVFilterContext *ctx = inlink->dst;
	ChromaNRContext *s = ctx->priv;
	const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
	int ret;

	s->nb_planes = desc->nb_components;
	s->depth = desc->comp[0].depth;
	s->filter_slice = s->depth <= 8 ? filter_slice8 : filter_slice16;
	s->chroma_w = 1 << desc->log2_chroma_w;
	s->chroma_h = 1 << desc->log2_chroma_h;
	s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
	s->planeheight[0] = s->planeheight[3] = inlink->h;
	s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
	s->planewidth[0] = s->planewidth[3] = inlink->w;

	if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
	return ret;

	return 0;
	}

	#define OFFSET(x) offsetof(ChromaNRContext, x)
	#define VF AV_OPT_FLAG_VIDEO_PARAM \| AV_OPT_FLAG_FILTERING_PARAM \| AV_OPT_FLAG_RUNTIME_PARAM

	static const AVOption chromanr_options[] = {
	{ "thres", "set y+u+v threshold", OFFSET(threshold), AV_OPT_TYPE_FLOAT, {.dbl=30}, 1, 200, VF },
	{ "sizew", "set horizontal size", OFFSET(sizew), AV_OPT_TYPE_INT, {.i64=5}, 1, 100, VF },
	{ "sizeh", "set vertical size", OFFSET(sizeh), AV_OPT_TYPE_INT, {.i64=5}, 1, 100, VF },
	{ "stepw", "set horizontal step", OFFSET(stepw), AV_OPT_TYPE_INT, {.i64=1}, 1, 50, VF },
	{ "steph", "set vertical step", OFFSET(steph), AV_OPT_TYPE_INT, {.i64=1}, 1, 50, VF },
	{ "threy", "set y threshold", OFFSET(threshold_y), AV_OPT_TYPE_FLOAT, {.dbl=200},1, 200, VF },
	{ "threu", "set u threshold", OFFSET(threshold_u), AV_OPT_TYPE_FLOAT, {.dbl=200},1, 200, VF },
	{ "threv", "set v threshold", OFFSET(threshold_v), AV_OPT_TYPE_FLOAT, {.dbl=200},1, 200, VF },
	{ NULL }
	};

	static const AVFilterPad inputs[] = {
	{
	.name = "default",
	.type = AVMEDIA_TYPE_VIDEO,
	.filter_frame = filter_frame,
	.config_props = config_input,
	},
	{ NULL }
	};

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

	AVFILTER_DEFINE_CLASS(chromanr);

	AVFilter ff_vf_chromanr = {
	.name = "chromanr",
	.description = NULL_IF_CONFIG_SMALL("Reduce chrominance noise."),
	.priv_size = sizeof(ChromaNRContext),
	.priv_class = &chromanr_class,
	.query_formats = query_formats,
	.outputs = outputs,
	.inputs = inputs,
	.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC \| AVFILTER_FLAG_SLICE_THREADS,
	.process_command = ff_filter_process_command,
	};