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avfilter: add deband filter

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2015-07-10 16:16:53 +00:00
parent b68e445f9b
commit 787d370e14
6 changed files with 353 additions and 1 deletions
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1
Changelog
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@ -20,6 +20,7 @@ version <next>:
- Dynamic Audio Normalizer as dynaudnorm filter
- Reverse filter
- Random filter
- deband filter
version 2.7:

37
doc/filters.texi
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@ -3878,6 +3878,43 @@ Violent denoise using a block size of @code{16x16}:
dctdnoiz=15:n=4
@end example
@section deband
Remove banding artifacts from input video.
It works by replacing banded pixels with average value of referenced pixels.
The filter accepts the following options:
@table @option
@item 1thr
@item 2thr
@item 3thr
@item 4thr
Set banding detection threshold for each plane. Default is 0.02.
Valid range is 0.00003 to 0.5.
If difference between current pixel and reference pixel is less than threshold,
it will be considered as banded.
@item range, r
Banding detection range in pixels. Default is 16. If positive, random number
in range 0 to set value will be used. If negative, exact absolute value
will be used.
The range defines square of four pixels around current pixel.
@item direction, d
Set direction in radians from which four pixel will be compared. If positive,
random direction from 0 to set direction will be picked. If negative, exact of
absolute value will be picked. For example direction 0, -PI or -2*PI radians
will pick only pixels on same row and -PI/2 will pick only pixels on same
column.
@item blur
If enabled, current pixel is compared with average value of all four
surrounding pixels. The default is enabled. If disabled current pixel is
compared with all four surrounding pixels. The pixel is considered banded
if only all four differences with surrounding pixels are less than threshold.
@end table
@anchor{decimate}
@section decimate

1
libavfilter/Makefile
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@ -112,6 +112,7 @@ OBJS-$(CONFIG_CROP_FILTER) += vf_crop.o
OBJS-$(CONFIG_CROPDETECT_FILTER) += vf_cropdetect.o
OBJS-$(CONFIG_CURVES_FILTER) += vf_curves.o
OBJS-$(CONFIG_DCTDNOIZ_FILTER) += vf_dctdnoiz.o
OBJS-$(CONFIG_DEBAND_FILTER) += vf_deband.o
OBJS-$(CONFIG_DECIMATE_FILTER) += vf_decimate.o
OBJS-$(CONFIG_DEFLATE_FILTER) += vf_neighbor.o
OBJS-$(CONFIG_DEJUDDER_FILTER) += vf_dejudder.o

1
libavfilter/allfilters.c
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@ -128,6 +128,7 @@ void avfilter_register_all(void)
REGISTER_FILTER(CROPDETECT, cropdetect, vf);
REGISTER_FILTER(CURVES, curves, vf);
REGISTER_FILTER(DCTDNOIZ, dctdnoiz, vf);
REGISTER_FILTER(DEBAND, deband, vf);
REGISTER_FILTER(DECIMATE, decimate, vf);
REGISTER_FILTER(DEFLATE, deflate, vf);
REGISTER_FILTER(DEJUDDER, dejudder, vf);

2
libavfilter/version.h
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@ -30,7 +30,7 @@
#include "libavutil/version.h"
#define LIBAVFILTER_VERSION_MAJOR 5
#define LIBAVFILTER_VERSION_MINOR 25
#define LIBAVFILTER_VERSION_MINOR 27
#define LIBAVFILTER_VERSION_MICRO 100
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \

312
libavfilter/vf_deband.c Normal file
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@ -0,0 +1,312 @@
/*
* Copyright (c) 2015 Niklas Haas
* Copyright (c) 2015 Paul B Mahol
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "internal.h"
#include "video.h"
typedef struct DebandContext {
const AVClass *class;
float threshold[4];
int range;
int blur;
float direction;
int nb_components;
int planewidth[4];
int planeheight[4];
int thr[4];
int *x_pos;
int *y_pos;
int (*deband)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
} DebandContext;
#define OFFSET(x) offsetof(DebandContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption deband_options[] = {
{ "1thr", "set 1st plane threshold", OFFSET(threshold[0]), AV_OPT_TYPE_FLOAT, {.dbl=0.02}, 0.00003, 0.5, FLAGS },
{ "2thr", "set 2nd plane threshold", OFFSET(threshold[1]), AV_OPT_TYPE_FLOAT, {.dbl=0.02}, 0.00003, 0.5, FLAGS },
{ "3thr", "set 3rd plane threshold", OFFSET(threshold[2]), AV_OPT_TYPE_FLOAT, {.dbl=0.02}, 0.00003, 0.5, FLAGS },
{ "4thr", "set 4th plane threshold", OFFSET(threshold[3]), AV_OPT_TYPE_FLOAT, {.dbl=0.02}, 0.00003, 0.5, FLAGS },
{ "range", "set range", OFFSET(range), AV_OPT_TYPE_INT, {.i64=16}, INT_MIN, INT_MAX, FLAGS },
{ "r", "set range", OFFSET(range), AV_OPT_TYPE_INT, {.i64=16}, INT_MIN, INT_MAX, FLAGS },
{ "direction", "set direction", OFFSET(direction), AV_OPT_TYPE_FLOAT, {.dbl=2*M_PI},-2*M_PI, 2*M_PI, FLAGS },
{ "d", "set direction", OFFSET(direction), AV_OPT_TYPE_FLOAT, {.dbl=2*M_PI},-2*M_PI, 2*M_PI, FLAGS },
{ "blur", "enable blur", OFFSET(blur), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(deband);
static int query_formats(AVFilterContext *ctx)
{
static const enum AVPixelFormat pix_fmts[] = {
AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16,
AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV440P,
AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ440P,
AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
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_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12,
AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP,
AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14,
AV_PIX_FMT_GBRP16, AV_PIX_FMT_GBRAP16,
AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
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);
}
static float frand(int x, int y)
{
const float r = sinf(x * 12.9898 + y * 78.233) * 43758.545;
return r - floorf(r);
}
static int inline get_avg(int ref0, int ref1, int ref2, int ref3)
{
return (ref0 + ref1 + ref2 + ref3) / 4;
}
typedef struct ThreadData {
AVFrame *in, *out;
} ThreadData;
static int deband_8_c(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
DebandContext *s = ctx->priv;
ThreadData *td = arg;
AVFrame *in = td->in;
AVFrame *out = td->out;
int x, y, p;
for (p = 0; p < s->nb_components; p++) {
const uint8_t *src_ptr = (const uint8_t *)in->data[p];
uint8_t *dst_ptr = (uint8_t *)out->data[p];
const int dst_linesize = out->linesize[p];
const int src_linesize = in->linesize[p];
const int thr = s->thr[p];
const int start = (s->planeheight[p] * jobnr ) / nb_jobs;
const int end = (s->planeheight[p] * (jobnr+1)) / nb_jobs;
const int w = s->planewidth[p] - 1;
const int h = s->planeheight[p] - 1;
for (y = start; y < end; y++) {
const int pos = y * s->planeheight[0];
for (x = 0; x < s->planewidth[p]; x++) {
const int x_pos = s->x_pos[pos + x];
const int y_pos = s->y_pos[pos + x];
const int ref0 = src_ptr[av_clip(y + y_pos, 0, h) * src_linesize + av_clip(x + x_pos, 0, w)];
const int ref1 = src_ptr[av_clip(y + -y_pos, 0, h) * src_linesize + av_clip(x + x_pos, 0, w)];
const int ref2 = src_ptr[av_clip(y + -y_pos, 0, h) * src_linesize + av_clip(x + -x_pos, 0, w)];
const int ref3 = src_ptr[av_clip(y + y_pos, 0, h) * src_linesize + av_clip(x + -x_pos, 0, w)];
const int src0 = src_ptr[y * src_linesize + x];
if (s->blur) {
const int avg = get_avg(ref0, ref1, ref2, ref3);
const int diff = FFABS(src0 - avg);
dst_ptr[y * dst_linesize + x] = diff < thr ? avg : src0;
} else {
dst_ptr[y * dst_linesize + x] = (FFABS(src0 - ref0) < thr) &&
(FFABS(src0 - ref1) < thr) &&
(FFABS(src0 - ref2) < thr) &&
(FFABS(src0 - ref3) < thr) ? get_avg(ref0, ref1, ref2, ref3) : src0;
}
}
}
}
return 0;
}
static int deband_16_c(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
DebandContext *s = ctx->priv;
ThreadData *td = arg;
AVFrame *in = td->in;
AVFrame *out = td->out;
int x, y, p;
for (p = 0; p < s->nb_components; p++) {
const uint16_t *src_ptr = (const uint16_t *)in->data[p];
uint16_t *dst_ptr = (uint16_t *)out->data[p];
const int dst_linesize = out->linesize[p] / 2;
const int src_linesize = in->linesize[p] / 2;
const int thr = s->thr[p];
const int start = (s->planeheight[p] * jobnr ) / nb_jobs;
const int end = (s->planeheight[p] * (jobnr+1)) / nb_jobs;
const int w = s->planewidth[p] - 1;
const int h = s->planeheight[p] - 1;
for (y = start; y < end; y++) {
const int pos = y * s->planeheight[0];
for (x = 0; x < s->planewidth[p]; x++) {
const int x_pos = s->x_pos[pos + x];
const int y_pos = s->y_pos[pos + x];
const int ref0 = src_ptr[av_clip(y + y_pos, 0, h) * src_linesize + av_clip(x + x_pos, 0, w)];
const int ref1 = src_ptr[av_clip(y + -y_pos, 0, h) * src_linesize + av_clip(x + x_pos, 0, w)];
const int ref2 = src_ptr[av_clip(y + -y_pos, 0, h) * src_linesize + av_clip(x + -x_pos, 0, w)];
const int ref3 = src_ptr[av_clip(y + y_pos, 0, h) * src_linesize + av_clip(x + -x_pos, 0, w)];
const int src0 = src_ptr[y * src_linesize + x];
if (s->blur) {
const int avg = get_avg(ref0, ref1, ref2, ref3);
const int diff = FFABS(src0 - avg);
dst_ptr[y * dst_linesize + x] = diff < thr ? avg : src0;
} else {
dst_ptr[y * dst_linesize + x] = (FFABS(src0 - ref0) < thr) &&
(FFABS(src0 - ref1) < thr) &&
(FFABS(src0 - ref2) < thr) &&
(FFABS(src0 - ref3) < thr) ? get_avg(ref0, ref1, ref2, ref3) : src0;
}
}
}
}
return 0;
}
static int config_input(AVFilterLink *inlink)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
AVFilterContext *ctx = inlink->dst;
DebandContext *s = ctx->priv;
const float direction = s->direction;
const int range = s->range;
int x, y;
s->nb_components = desc->nb_components;
s->planeheight[1] = s->planeheight[2] = FF_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
s->planeheight[0] = s->planeheight[3] = inlink->h;
s->planewidth[1] = s->planewidth[2] = FF_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
s->planewidth[0] = s->planewidth[3] = inlink->w;
s->deband = desc->comp[0].depth_minus1 > 7 ? deband_16_c : deband_8_c;
s->thr[0] = ((1 << (desc->comp[0].depth_minus1 + 1)) - 1) * s->threshold[0];
s->thr[1] = ((1 << (desc->comp[1].depth_minus1 + 1)) - 1) * s->threshold[1];
s->thr[2] = ((1 << (desc->comp[2].depth_minus1 + 1)) - 1) * s->threshold[2];
s->thr[3] = ((1 << (desc->comp[3].depth_minus1 + 1)) - 1) * s->threshold[3];
s->x_pos = av_malloc(s->planewidth[0] * s->planeheight[0] * sizeof(*s->x_pos));
s->y_pos = av_malloc(s->planewidth[0] * s->planeheight[0] * sizeof(*s->y_pos));
if (!s->x_pos || !s->y_pos)
return AVERROR(ENOMEM);
for (y = 0; y < s->planeheight[0]; y++) {
for (x = 0; x < s->planewidth[0]; x++) {
const float r = frand(x, y);
const float dir = direction < 0 ? -direction : r * direction;
const int dist = range < 0 ? -range : r * range;
s->x_pos[y * s->planeheight[0] + x] = cosf(dir) * dist;
s->y_pos[y * s->planeheight[0] + x] = sinf(dir) * dist;
}
}
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = ctx->outputs[0];
DebandContext *s = ctx->priv;
AVFrame *out;
ThreadData td;
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);
td.in = in; td.out = out;
ctx->internal->execute(ctx, s->deband, &td, NULL, FFMIN3(s->planeheight[1],
s->planeheight[2],
ctx->graph->nb_threads));
av_frame_free(&in);
return ff_filter_frame(outlink, out);
}
static av_cold void uninit(AVFilterContext *ctx)
{
DebandContext *s = ctx->priv;
av_freep(&s->x_pos);
av_freep(&s->y_pos);
}
static const AVFilterPad avfilter_vf_deband_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_input,
.filter_frame = filter_frame,
},
{ NULL }
};
static const AVFilterPad avfilter_vf_deband_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
{ NULL }
};
AVFilter ff_vf_deband = {
.name = "deband",
.description = NULL_IF_CONFIG_SMALL("Debands video."),
.priv_size = sizeof(DebandContext),
.priv_class = &deband_class,
.uninit = uninit,
.query_formats = query_formats,
.inputs = avfilter_vf_deband_inputs,
.outputs = avfilter_vf_deband_outputs,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
};