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avfilter: add Contrast Adaptive Sharpen video filter

This commit is contained in:
Paul B Mahol 2020-02-10 18:10:55 +01:00
parent c6cc9d9cd7
commit 72b6c8c99f
6 changed files with 318 additions and 1 deletions
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1
Changelog
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@ -42,6 +42,7 @@ version <next>:
- siren audio decoder
- Rayman 2 ADPCM decoder
- Rayman 2 APM demuxer
- cas video filter
version 4.2:

15
doc/filters.texi
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@ -6996,6 +6996,21 @@ Only deinterlace frames marked as interlaced.
The default value is @code{all}.
@end table
@section cas
Apply Contrast Adaptive Sharpen filter to video stream.
The filter accepts the following options:
@table @option
@item strength
Set the sharpening strength. Default value is 0.
@item planes
Set planes to filter. Default value is to filter all
planes except alpha plane.
@end table
@section chromahold
Remove all color information for all colors except for certain one.

1
libavfilter/Makefile
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@ -177,6 +177,7 @@ OBJS-$(CONFIG_BOXBLUR_FILTER) += vf_boxblur.o boxblur.o
OBJS-$(CONFIG_BOXBLUR_OPENCL_FILTER) += vf_avgblur_opencl.o opencl.o \
opencl/avgblur.o boxblur.o
OBJS-$(CONFIG_BWDIF_FILTER) += vf_bwdif.o yadif_common.o
OBJS-$(CONFIG_CAS_FILTER) += vf_cas.o
OBJS-$(CONFIG_CHROMABER_VULKAN_FILTER) += vf_chromaber_vulkan.o vulkan.o
OBJS-$(CONFIG_CHROMAHOLD_FILTER) += vf_chromakey.o
OBJS-$(CONFIG_CHROMAKEY_FILTER) += vf_chromakey.o

1
libavfilter/allfilters.c
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@ -168,6 +168,7 @@ extern AVFilter ff_vf_bm3d;
extern AVFilter ff_vf_boxblur;
extern AVFilter ff_vf_boxblur_opencl;
extern AVFilter ff_vf_bwdif;
extern AVFilter ff_vf_cas;
extern AVFilter ff_vf_chromahold;
extern AVFilter ff_vf_chromakey;
extern AVFilter ff_vf_chromashift;

2
libavfilter/version.h
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@ -30,7 +30,7 @@
#include "libavutil/version.h"
#define LIBAVFILTER_VERSION_MAJOR 7
#define LIBAVFILTER_VERSION_MINOR 76
#define LIBAVFILTER_VERSION_MINOR 77
#define LIBAVFILTER_VERSION_MICRO 100

299
libavfilter/vf_cas.c Normal file
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@ -0,0 +1,299 @@
/*
* 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/opt.h"
#include "libavutil/imgutils.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
typedef struct CASContext {
const AVClass *class;
float strength;
int planes;
int nb_planes;
int depth;
int planeheight[4];
int planewidth[4];
AVFrame *in;
int (*do_slice)(AVFilterContext *s, void *arg,
int jobnr, int nb_jobs);
} CASContext;
static inline float lerpf(float v0, float v1, float f)
{
return v0 + (v1 - v0) * f;
}
static int cas_slice8(AVFilterContext *avctx, void *arg, int jobnr, int nb_jobs)
{
CASContext *s = avctx->priv;
const float strength = -lerpf(16.f, 4.01f, s->strength);
AVFrame *out = arg;
AVFrame *in = s->in;
for (int p = 0; p < s->nb_planes; p++) {
const int slice_start = (s->planeheight[p] * jobnr) / nb_jobs;
const int slice_end = (s->planeheight[p] * (jobnr+1)) / nb_jobs;
const int linesize = out->linesize[p];
const int in_linesize = in->linesize[p];
const int w = s->planewidth[p];
const int w1 = w - 1;;
const int h = s->planeheight[p];
const int h1 = h - 1;
uint8_t *dst = out->data[p] + slice_start * linesize;
const uint8_t *src = in->data[p];
if (!((1 << p) & s->planes)) {
av_image_copy_plane(dst, linesize, src + slice_start * linesize, in_linesize,
w, slice_end - slice_start);
continue;
}
for (int y = slice_start; y < slice_end; y++) {
const int y0 = FFMAX(y - 1, 0);
const int y1 = FFMIN(y + 1, h1);
for (int x = 0; x < w; x++) {
const int x0 = FFMAX(x - 1, 0);
const int x1 = FFMIN(x + 1, w1);
int a = src[y0 * in_linesize + x0];
int b = src[y0 * in_linesize + x];
int c = src[y0 * in_linesize + x1];
int d = src[y * in_linesize + x0];
int e = src[y * in_linesize + x];
int f = src[y * in_linesize + x1];
int g = src[y1 * in_linesize + x0];
int h = src[y1 * in_linesize + x];
int i = src[y1 * in_linesize + x1];
int mn, mn2, mx, mx2;
float amp, weight;
mn = FFMIN3(FFMIN3( d, e, f), b, h);
mn2 = FFMIN3(FFMIN3(mn, a, c), g, i);
mn = mn + mn2;
mx = FFMAX3(FFMAX3( d, e, f), b, h);
mx2 = FFMAX3(FFMAX3(mx, a, c), g, i);
mx = mx + mx2;
amp = sqrtf(av_clipf(FFMIN(mn, 511 - mx) / (float)mx, 0.f, 1.f));
weight = amp / strength;
dst[x] = av_clip_uint8(((b + d + f + h) * weight + e) / (1.f + 4.f * weight));
}
dst += linesize;
}
}
return 0;
}
static int cas_slice16(AVFilterContext *avctx, void *arg, int jobnr, int nb_jobs)
{
CASContext *s = avctx->priv;
const float strength = -lerpf(16.f, 4.01f, s->strength);
const int max = 2 * (1 << s->depth) - 1;
AVFrame *out = arg;
AVFrame *in = s->in;
for (int p = 0; p < s->nb_planes; p++) {
const int slice_start = (s->planeheight[p] * jobnr) / nb_jobs;
const int slice_end = (s->planeheight[p] * (jobnr+1)) / nb_jobs;
const int linesize = out->linesize[p] / 2;
const int in_linesize = in->linesize[p] / 2;
const int w = s->planewidth[p];
const int w1 = w - 1;;
const int h = s->planeheight[p];
const int h1 = h - 1;
uint16_t *dst = (uint16_t *)out->data[p] + slice_start * linesize;
const uint16_t *src = (const uint16_t *)in->data[p];
if (!((1 << p) & s->planes)) {
av_image_copy_plane((uint8_t *)dst, linesize, (uint8_t *)(src + slice_start * linesize),
in_linesize, w * 2, slice_end - slice_start);
continue;
}
for (int y = slice_start; y < slice_end; y++) {
const int y0 = FFMAX(y - 1, 0);
const int y1 = FFMIN(y + 1, h1);
for (int x = 0; x < w; x++) {
const int x0 = FFMAX(x - 1, 0);
const int x1 = FFMIN(x + 1, w1);
int a = src[y0 * in_linesize + x0];
int b = src[y0 * in_linesize + x];
int c = src[y0 * in_linesize + x1];
int d = src[y * in_linesize + x0];
int e = src[y * in_linesize + x];
int f = src[y * in_linesize + x1];
int g = src[y1 * in_linesize + x0];
int h = src[y1 * in_linesize + x];
int i = src[y1 * in_linesize + x1];
int mn, mn2, mx, mx2;
float amp, weight;
mn = FFMIN3(FFMIN3( d, e, f), b, h);
mn2 = FFMIN3(FFMIN3(mn, a, c), g, i);
mn = mn + mn2;
mx = FFMAX3(FFMAX3( d, e, f), b, h);
mx2 = FFMAX3(FFMAX3(mx, a, c), g, i);
mx = mx + mx2;
amp = sqrtf(av_clipf(FFMIN(mn, max - mx) / (float)mx, 0.f, 1.f));
weight = amp / strength;
dst[x] = av_clip_uintp2_c(((b + d + f + h) * weight + e) / (1.f + 4.f * weight), s->depth);
}
dst += linesize;
}
}
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = ctx->outputs[0];
CASContext *s = ctx->priv;
AVFrame *out;
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->in = in;
ctx->internal->execute(ctx, s->do_slice, out, NULL,
FFMIN(in->height, ff_filter_get_nb_threads(ctx)));
av_frame_free(&in);
s->in = NULL;
return ff_filter_frame(ctx->outputs[0], out);
}
static av_cold int query_formats(AVFilterContext *avctx)
{
static const enum AVPixelFormat pixel_fmts[] = {
AV_PIX_FMT_GRAY8,
AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10,
AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
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_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
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_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
AV_PIX_FMT_NONE
};
AVFilterFormats *formats = NULL;
formats = ff_make_format_list(pixel_fmts);
if (!formats)
return AVERROR(ENOMEM);
return ff_set_common_formats(avctx, formats);
}
static av_cold int config_input(AVFilterLink *inlink)
{
AVFilterContext *avctx = inlink->dst;
CASContext *s = avctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
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;
s->depth = desc->comp[0].depth;
s->nb_planes = desc->nb_components;
s->do_slice = s->depth <= 8 ? cas_slice8 : cas_slice16;
return 0;
}
static const AVFilterPad cas_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
.config_props = config_input,
},
{ NULL }
};
static const AVFilterPad cas_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
{ NULL }
};
#define OFFSET(x) offsetof(CASContext, x)
#define VF AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
static const AVOption cas_options[] = {
{ "strength", "set the sharpening strength", OFFSET(strength), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 1, VF },
{ "planes", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=7}, 0, 15, VF },
{ NULL }
};
AVFILTER_DEFINE_CLASS(cas);
AVFilter ff_vf_cas = {
.name = "cas",
.description = NULL_IF_CONFIG_SMALL("Contrast Adaptive Sharpen."),
.priv_size = sizeof(CASContext),
.priv_class = &cas_class,
.query_formats = query_formats,
.inputs = cas_inputs,
.outputs = cas_outputs,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
.process_command = ff_filter_process_command,
};