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

 /*
  * Copyright (c) 2021 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 <float.h>

 #include "libavutil/opt.h"
 #include "libavutil/imgutils.h"
 #include "avfilter.h"
 #include "formats.h"
 #include "internal.h"
 #include "video.h"

 typedef struct MonochromeContext {
     const AVClass *class;

     float b, r;
     float size;
     float high;

     int depth;
     int subw, subh;

     int (*do_slice)(AVFilterContext *s, void *arg,
                     int jobnr, int nb_jobs);
     int (*clear_uv)(AVFilterContext *s, void *arg,
                     int jobnr, int nb_jobs);
 } MonochromeContext;

 static float envelope(const float x)
 {
     const float beta = 0.6f;

     if (x < beta) {
         const float tmp = fabsf(x / beta - 1.f);

         return 1.f - tmp * tmp;
     } else {
         const float tmp = (1.f - x) / (1.f - beta);

         return tmp * tmp * (3.f - 2.f * tmp);
     }
 }

 static float filter(float b, float r, float u, float v, float size)
 {
     return expf(-av_clipf(((b - u) * (b - u) +
                            (r - v) * (r - v)) *
                             size, 0.f, 1.f));
 }

 #define PROCESS()                            \
     const int cx = x >> subw;                \
     float y = yptr[x] * imax;                \
     float u = uptr[cx] * imax - .5f;         \
     float v = vptr[cx] * imax - .5f;         \
     float tt, t, ny;                         \
                                              \
     ny = filter(b, r, u, v, size);           \
     tt = envelope(y);                        \
     t = tt + (1.f - tt) * ihigh;             \
     ny = (1.f - t) * y + t * ny * y;

 static int monochrome_slice8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 {
     MonochromeContext *s = ctx->priv;
     AVFrame *frame = arg;
     const int depth = s->depth;
     const int subw = s->subw;
     const int subh = s->subh;
     const float max = (1 << depth) - 1;
     const float imax = 1.f / max;
     const int width = frame->width;
     const int height = frame->height;
     const int slice_start = (height * jobnr) / nb_jobs;
     const int slice_end = (height * (jobnr + 1)) / nb_jobs;
     const int ylinesize = frame->linesize[0];
     const int ulinesize = frame->linesize[1];
     const int vlinesize = frame->linesize[2];
     uint8_t *yptr = frame->data[0] + slice_start * ylinesize;
     const float ihigh = 1.f - s->high;
     const float size = 1.f / s->size;
     const float b = s->b * .5f;
     const float r = s->r * .5f;

     for (int y = slice_start; y < slice_end; y++) {
         const int cy = y >> subh;
         uint8_t *uptr = frame->data[1] + cy * ulinesize;
         uint8_t *vptr = frame->data[2] + cy * vlinesize;

         for (int x = 0; x < width; x++) {
             PROCESS()

             yptr[x] = av_clip_uint8(ny * max);
         }

         yptr += ylinesize;
     }

     return 0;
 }

 static int monochrome_slice16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 {
     MonochromeContext *s = ctx->priv;
     AVFrame *frame = arg;
     const int depth = s->depth;
     const int subw = s->subw;
     const int subh = s->subh;
     const float max = (1 << depth) - 1;
     const float imax = 1.f / max;
     const int width = frame->width;
     const int height = frame->height;
     const int slice_start = (height * jobnr) / nb_jobs;
     const int slice_end = (height * (jobnr + 1)) / nb_jobs;
     const int ylinesize = frame->linesize[0] / 2;
     const int ulinesize = frame->linesize[1] / 2;
     const int vlinesize = frame->linesize[2] / 2;
     uint16_t *yptr = (uint16_t *)frame->data[0] + slice_start * ylinesize;
     const float ihigh = 1.f - s->high;
     const float size = 1.f / s->size;
     const float b = s->b * .5f;
     const float r = s->r * .5f;

     for (int y = slice_start; y < slice_end; y++) {
         const int cy = y >> subh;
         uint16_t *uptr = (uint16_t *)frame->data[1] + cy * ulinesize;
         uint16_t *vptr = (uint16_t *)frame->data[2] + cy * vlinesize;

         for (int x = 0; x < width; x++) {
             PROCESS()

             yptr[x] = av_clip_uintp2_c(ny * max, depth);
         }

         yptr += ylinesize;
     }

     return 0;
 }

 static int clear_slice8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 {
     MonochromeContext *s = ctx->priv;
     AVFrame *frame = arg;
     const int depth = s->depth;
     const int half = 1 << (depth - 1);
     const int subw = s->subw;
     const int subh = s->subh;
     const int width = AV_CEIL_RSHIFT(frame->width, subw);
     const int height = AV_CEIL_RSHIFT(frame->height, subh);
     const int slice_start = (height * jobnr) / nb_jobs;
     const int slice_end = (height * (jobnr + 1)) / nb_jobs;
     const int ulinesize = frame->linesize[1];
     const int vlinesize = frame->linesize[2];

     for (int y = slice_start; y < slice_end; y++) {
         uint8_t *uptr = frame->data[1] + y * ulinesize;
         uint8_t *vptr = frame->data[2] + y * vlinesize;

         memset(uptr, half, width);
         memset(vptr, half, width);
     }

     return 0;
 }

 static int clear_slice16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 {
     MonochromeContext *s = ctx->priv;
     AVFrame *frame = arg;
     const int depth = s->depth;
     const int half = 1 << (depth - 1);
     const int subw = s->subw;
     const int subh = s->subh;
     const int width = AV_CEIL_RSHIFT(frame->width, subw);
     const int height = AV_CEIL_RSHIFT(frame->height, subh);
     const int slice_start = (height * jobnr) / nb_jobs;
     const int slice_end = (height * (jobnr + 1)) / nb_jobs;
     const int ulinesize = frame->linesize[1] / 2;
     const int vlinesize = frame->linesize[2] / 2;

     for (int y = slice_start; y < slice_end; y++) {
         uint16_t *uptr = (uint16_t *)frame->data[1] + y * ulinesize;
         uint16_t *vptr = (uint16_t *)frame->data[2] + y * vlinesize;

         for (int x = 0; x < width; x++) {
             uptr[x] = half;
             vptr[x] = half;
         }
     }

     return 0;
 }

 static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
 {
     AVFilterContext *ctx = inlink->dst;
     MonochromeContext *s = ctx->priv;

     ctx->internal->execute(ctx, s->do_slice, frame, NULL,
                            FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
     ctx->internal->execute(ctx, s->clear_uv, frame, NULL,
                            FFMIN(frame->height >> s->subh, ff_filter_get_nb_threads(ctx)));

     return ff_filter_frame(ctx->outputs[0], frame);
 }

 static av_cold int query_formats(AVFilterContext *ctx)
 {
     static const enum AVPixelFormat pixel_fmts[] = {
         AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
         AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
         AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
         AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
         AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
         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_YUV444P10,
         AV_PIX_FMT_YUV440P10,
         AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
         AV_PIX_FMT_YUV440P12,
         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_YUVA420P,  AV_PIX_FMT_YUVA422P,   AV_PIX_FMT_YUVA444P,
         AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA444P16,
         AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA422P16,
         AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA420P16,
         AV_PIX_FMT_NONE
     };

     AVFilterFormats *formats = NULL;

     formats = ff_make_format_list(pixel_fmts);
     if (!formats)
         return AVERROR(ENOMEM);

     return ff_set_common_formats(ctx, formats);
 }

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

     s->depth = desc->comp[0].depth;
     s->do_slice = s->depth <= 8 ? monochrome_slice8 : monochrome_slice16;
     s->clear_uv = s->depth <= 8 ? clear_slice8 : clear_slice16;
     s->subw = desc->log2_chroma_w;
     s->subh = desc->log2_chroma_h;

     return 0;
 }

 static const AVFilterPad monochrome_inputs[] = {
     {
         .name           = "default",
         .type           = AVMEDIA_TYPE_VIDEO,
         .needs_writable = 1,
         .filter_frame   = filter_frame,
         .config_props   = config_input,
     },
     { NULL }
 };

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

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

 static const AVOption monochrome_options[] = {
     { "cb",   "set the chroma blue spot",    OFFSET(b),    AV_OPT_TYPE_FLOAT, {.dbl=0},-1, 1, VF },
     { "cr",   "set the chroma red spot",     OFFSET(r),    AV_OPT_TYPE_FLOAT, {.dbl=0},-1, 1, VF },
     { "size", "set the color filter size",   OFFSET(size), AV_OPT_TYPE_FLOAT, {.dbl=1},.1,10, VF },
     { "high", "set the highlights strength", OFFSET(high), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 1, VF },
     { NULL }
 };

 AVFILTER_DEFINE_CLASS(monochrome);

 AVFilter ff_vf_monochrome = {
     .name          = "monochrome",
     .description   = NULL_IF_CONFIG_SMALL("Convert video to gray using custom color filter."),
     .priv_size     = sizeof(MonochromeContext),
     .priv_class    = &monochrome_class,
     .query_formats = query_formats,
     .inputs        = monochrome_inputs,
     .outputs       = monochrome_outputs,
     .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
     .process_command = ff_filter_process_command,
 };
	/*
	* Copyright (c) 2021 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 <float.h>

	#include "libavutil/opt.h"
	#include "libavutil/imgutils.h"
	#include "avfilter.h"
	#include "formats.h"
	#include "internal.h"
	#include "video.h"

	typedef struct MonochromeContext {
	const AVClass *class;

	float b, r;
	float size;
	float high;

	int depth;
	int subw, subh;

	int (do_slice)(AVFilterContext s, void *arg,
	int jobnr, int nb_jobs);
	int (clear_uv)(AVFilterContext s, void *arg,
	int jobnr, int nb_jobs);
	} MonochromeContext;

	static float envelope(const float x)
	{
	const float beta = 0.6f;

	if (x < beta) {
	const float tmp = fabsf(x / beta - 1.f);

	return 1.f - tmp * tmp;
	} else {
	const float tmp = (1.f - x) / (1.f - beta);

	return tmp * tmp * (3.f - 2.f * tmp);
	}
	}

	static float filter(float b, float r, float u, float v, float size)
	{
	return expf(-av_clipf(((b - u) * (b - u) +
	(r - v) * (r - v)) *
	size, 0.f, 1.f));
	}

	#define PROCESS() \
	const int cx = x >> subw; \
	float y = yptr[x] * imax; \
	float u = uptr[cx] * imax - .5f; \
	float v = vptr[cx] * imax - .5f; \
	float tt, t, ny; \
	\
	ny = filter(b, r, u, v, size); \
	tt = envelope(y); \
	t = tt + (1.f - tt) * ihigh; \
	ny = (1.f - t) * y + t * ny * y;

	static int monochrome_slice8(AVFilterContext ctx, void arg, int jobnr, int nb_jobs)
	{
	MonochromeContext *s = ctx->priv;
	AVFrame *frame = arg;
	const int depth = s->depth;
	const int subw = s->subw;
	const int subh = s->subh;
	const float max = (1 << depth) - 1;
	const float imax = 1.f / max;
	const int width = frame->width;
	const int height = frame->height;
	const int slice_start = (height * jobnr) / nb_jobs;
	const int slice_end = (height * (jobnr + 1)) / nb_jobs;
	const int ylinesize = frame->linesize[0];
	const int ulinesize = frame->linesize[1];
	const int vlinesize = frame->linesize[2];
	uint8_t yptr = frame->data[0] + slice_start ylinesize;
	const float ihigh = 1.f - s->high;
	const float size = 1.f / s->size;
	const float b = s->b * .5f;
	const float r = s->r * .5f;

	for (int y = slice_start; y < slice_end; y++) {
	const int cy = y >> subh;
	uint8_t uptr = frame->data[1] + cy ulinesize;
	uint8_t vptr = frame->data[2] + cy vlinesize;

	for (int x = 0; x < width; x++) {
	PROCESS()

	yptr[x] = av_clip_uint8(ny * max);
	}

	yptr += ylinesize;
	}

	return 0;
	}

	static int monochrome_slice16(AVFilterContext ctx, void arg, int jobnr, int nb_jobs)
	{
	MonochromeContext *s = ctx->priv;
	AVFrame *frame = arg;
	const int depth = s->depth;
	const int subw = s->subw;
	const int subh = s->subh;
	const float max = (1 << depth) - 1;
	const float imax = 1.f / max;
	const int width = frame->width;
	const int height = frame->height;
	const int slice_start = (height * jobnr) / nb_jobs;
	const int slice_end = (height * (jobnr + 1)) / nb_jobs;
	const int ylinesize = frame->linesize[0] / 2;
	const int ulinesize = frame->linesize[1] / 2;
	const int vlinesize = frame->linesize[2] / 2;
	uint16_t yptr = (uint16_t )frame->data[0] + slice_start * ylinesize;
	const float ihigh = 1.f - s->high;
	const float size = 1.f / s->size;
	const float b = s->b * .5f;
	const float r = s->r * .5f;

	for (int y = slice_start; y < slice_end; y++) {
	const int cy = y >> subh;
	uint16_t uptr = (uint16_t )frame->data[1] + cy * ulinesize;
	uint16_t vptr = (uint16_t )frame->data[2] + cy * vlinesize;

	for (int x = 0; x < width; x++) {
	PROCESS()

	yptr[x] = av_clip_uintp2_c(ny * max, depth);
	}

	yptr += ylinesize;
	}

	return 0;
	}

	static int clear_slice8(AVFilterContext ctx, void arg, int jobnr, int nb_jobs)
	{
	MonochromeContext *s = ctx->priv;
	AVFrame *frame = arg;
	const int depth = s->depth;
	const int half = 1 << (depth - 1);
	const int subw = s->subw;
	const int subh = s->subh;
	const int width = AV_CEIL_RSHIFT(frame->width, subw);
	const int height = AV_CEIL_RSHIFT(frame->height, subh);
	const int slice_start = (height * jobnr) / nb_jobs;
	const int slice_end = (height * (jobnr + 1)) / nb_jobs;
	const int ulinesize = frame->linesize[1];
	const int vlinesize = frame->linesize[2];

	for (int y = slice_start; y < slice_end; y++) {
	uint8_t uptr = frame->data[1] + y ulinesize;
	uint8_t vptr = frame->data[2] + y vlinesize;

	memset(uptr, half, width);
	memset(vptr, half, width);
	}

	return 0;
	}

	static int clear_slice16(AVFilterContext ctx, void arg, int jobnr, int nb_jobs)
	{
	MonochromeContext *s = ctx->priv;
	AVFrame *frame = arg;
	const int depth = s->depth;
	const int half = 1 << (depth - 1);
	const int subw = s->subw;
	const int subh = s->subh;
	const int width = AV_CEIL_RSHIFT(frame->width, subw);
	const int height = AV_CEIL_RSHIFT(frame->height, subh);
	const int slice_start = (height * jobnr) / nb_jobs;
	const int slice_end = (height * (jobnr + 1)) / nb_jobs;
	const int ulinesize = frame->linesize[1] / 2;
	const int vlinesize = frame->linesize[2] / 2;

	for (int y = slice_start; y < slice_end; y++) {
	uint16_t uptr = (uint16_t )frame->data[1] + y * ulinesize;
	uint16_t vptr = (uint16_t )frame->data[2] + y * vlinesize;

	for (int x = 0; x < width; x++) {
	uptr[x] = half;
	vptr[x] = half;
	}
	}

	return 0;
	}

	static int filter_frame(AVFilterLink inlink, AVFrame frame)
	{
	AVFilterContext *ctx = inlink->dst;
	MonochromeContext *s = ctx->priv;

	ctx->internal->execute(ctx, s->do_slice, frame, NULL,
	FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
	ctx->internal->execute(ctx, s->clear_uv, frame, NULL,
	FFMIN(frame->height >> s->subh, ff_filter_get_nb_threads(ctx)));

	return ff_filter_frame(ctx->outputs[0], frame);
	}

	static av_cold int query_formats(AVFilterContext *ctx)
	{
	static const enum AVPixelFormat pixel_fmts[] = {
	AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
	AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
	AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
	AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
	AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
	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_YUV444P10,
	AV_PIX_FMT_YUV440P10,
	AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
	AV_PIX_FMT_YUV440P12,
	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_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
	AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA444P16,
	AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA422P16,
	AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA420P16,
	AV_PIX_FMT_NONE
	};

	AVFilterFormats *formats = NULL;

	formats = ff_make_format_list(pixel_fmts);
	if (!formats)
	return AVERROR(ENOMEM);

	return ff_set_common_formats(ctx, formats);
	}

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

	s->depth = desc->comp[0].depth;
	s->do_slice = s->depth <= 8 ? monochrome_slice8 : monochrome_slice16;
	s->clear_uv = s->depth <= 8 ? clear_slice8 : clear_slice16;
	s->subw = desc->log2_chroma_w;
	s->subh = desc->log2_chroma_h;

	return 0;
	}

	static const AVFilterPad monochrome_inputs[] = {
	{
	.name = "default",
	.type = AVMEDIA_TYPE_VIDEO,
	.needs_writable = 1,
	.filter_frame = filter_frame,
	.config_props = config_input,
	},
	{ NULL }
	};

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

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

	static const AVOption monochrome_options[] = {
	{ "cb", "set the chroma blue spot", OFFSET(b), AV_OPT_TYPE_FLOAT, {.dbl=0},-1, 1, VF },
	{ "cr", "set the chroma red spot", OFFSET(r), AV_OPT_TYPE_FLOAT, {.dbl=0},-1, 1, VF },
	{ "size", "set the color filter size", OFFSET(size), AV_OPT_TYPE_FLOAT, {.dbl=1},.1,10, VF },
	{ "high", "set the highlights strength", OFFSET(high), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 1, VF },
	{ NULL }
	};

	AVFILTER_DEFINE_CLASS(monochrome);

	AVFilter ff_vf_monochrome = {
	.name = "monochrome",
	.description = NULL_IF_CONFIG_SMALL("Convert video to gray using custom color filter."),
	.priv_size = sizeof(MonochromeContext),
	.priv_class = &monochrome_class,
	.query_formats = query_formats,
	.inputs = monochrome_inputs,
	.outputs = monochrome_outputs,
	.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC \| AVFILTER_FLAG_SLICE_THREADS,
	.process_command = ff_filter_process_command,
	};