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/*
* 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,
};
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