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avfilter: add varblur video filter

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This commit is contained in:
Paul B Mahol 2021-10-11 15:56:30 +02:00
parent 66f8055c89
commit 407acc0747
6 changed files with 421 additions and 1 deletions
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1
Changelog
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@ -28,6 +28,7 @@ version <next>:
- speex decoder
- limitdiff video filter
- xcorrelate video filter
- varblur video filter
version 4.4:

16
doc/filters.texi
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@ -21704,6 +21704,22 @@ Threshold used depends also on each decomposition coefficients.
Default is universal.
@end table
@section varblur
Apply variable blur filter by using 2nd video stream to set blur radius.
This filter accepts the following options:
@table @option
@item min_r
Set min allowed radius. By default is 0. Allowed range is from 0 to 254.
@item max_r
Set max allowed radius. By default is 8. Allowed range is from 1 to 255.
@item planes
Set which planes to process. By default all are used.
@end table
The @code{varblur} filter also supports the @ref{framesync} options.
@section vectorscope
Display 2 color component values in the two dimensional graph (which is called

1
libavfilter/Makefile
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@ -485,6 +485,7 @@ OBJS-$(CONFIG_UNTILE_FILTER) += vf_untile.o
OBJS-$(CONFIG_USPP_FILTER) += vf_uspp.o qp_table.o
OBJS-$(CONFIG_V360_FILTER) += vf_v360.o
OBJS-$(CONFIG_VAGUEDENOISER_FILTER) += vf_vaguedenoiser.o
OBJS-$(CONFIG_VARBLUR_FILTER) += vf_varblur.o framesync.o
OBJS-$(CONFIG_VECTORSCOPE_FILTER) += vf_vectorscope.o
OBJS-$(CONFIG_VFLIP_FILTER) += vf_vflip.o
OBJS-$(CONFIG_VFRDET_FILTER) += vf_vfrdet.o

1
libavfilter/allfilters.c
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@ -462,6 +462,7 @@ extern const AVFilter ff_vf_untile;
extern const AVFilter ff_vf_uspp;
extern const AVFilter ff_vf_v360;
extern const AVFilter ff_vf_vaguedenoiser;
extern const AVFilter ff_vf_varblur;
extern const AVFilter ff_vf_vectorscope;
extern const AVFilter ff_vf_vflip;
extern const AVFilter ff_vf_vfrdet;

2
libavfilter/version.h
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@ -30,7 +30,7 @@
#include "libavutil/version.h"
#define LIBAVFILTER_VERSION_MAJOR 8
#define LIBAVFILTER_VERSION_MINOR 14
#define LIBAVFILTER_VERSION_MINOR 15
#define LIBAVFILTER_VERSION_MICRO 100

401
libavfilter/vf_varblur.c Normal file
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@ -0,0 +1,401 @@
/*
* 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 "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "formats.h"
#include "framesync.h"
#include "internal.h"
#include "video.h"
typedef struct VarBlurContext {
const AVClass *class;
FFFrameSync fs;
int min_radius;
int max_radius;
int planes;
int depth;
int planewidth[4];
int planeheight[4];
AVFrame *sat;
int nb_planes;
void (*compute_sat)(const uint8_t *ssrc,
int linesize,
int w, int h,
const uint8_t *dstp,
int dst_linesize);
int (*blur_plane)(AVFilterContext *ctx,
uint8_t *ddst,
int ddst_linesize,
const uint8_t *rrptr,
int rrptr_linesize,
int w, int h,
const uint8_t *pptr,
int pptr_linesize,
int slice_start, int slice_end);
} VarBlurContext;
#define OFFSET(x) offsetof(VarBlurContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
static const AVOption varblur_options[] = {
{ "min_r", "set min blur radius", OFFSET(min_radius), AV_OPT_TYPE_INT, {.i64=0}, 0, 254, FLAGS },
{ "max_r", "set max blur radius", OFFSET(max_radius), AV_OPT_TYPE_INT, {.i64=8}, 1, 255, FLAGS },
{ "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
{ NULL }
};
FRAMESYNC_DEFINE_CLASS(varblur, VarBlurContext, fs);
static const enum AVPixelFormat pix_fmts[] = {
AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
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_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
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_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
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_NONE
};
#define COMPUTE_SAT(type, stype, depth) \
static void compute_sat##depth(const uint8_t *ssrc, \
int linesize, \
int w, int h, \
const uint8_t *dstp, \
int dst_linesize) \
{ \
const type *src = (const type *)ssrc; \
stype *dst = (stype *)dstp; \
\
linesize /= (depth / 8); \
dst_linesize /= (depth / 2); \
dst += dst_linesize; \
\
for (int y = 0; y < h; y++) { \
stype sum = 0; \
\
for (int x = 1; x < w; x++) { \
sum += src[x - 1]; \
dst[x] = sum + dst[x - dst_linesize]; \
} \
\
src += linesize; \
dst += dst_linesize; \
} \
}
COMPUTE_SAT(uint8_t, uint32_t, 8)
COMPUTE_SAT(uint16_t, uint64_t, 16)
typedef struct ThreadData {
AVFrame *in, *out, *radius;
} ThreadData;
static float lerpf(float v0, float v1, float f)
{
return v0 + (v1 - v0) * f;
}
#define BLUR_PLANE(type, stype, bits) \
static int blur_plane##bits(AVFilterContext *ctx, \
uint8_t *ddst, \
int ddst_linesize, \
const uint8_t *rrptr, \
int rrptr_linesize, \
int w, int h, \
const uint8_t *pptr, \
int pptr_linesize, \
int slice_start, int slice_end) \
{ \
VarBlurContext *s = ctx->priv; \
const int ddepth = s->depth; \
const int dst_linesize = ddst_linesize / (bits / 8); \
const int ptr_linesize = pptr_linesize / (bits / 2); \
const int rptr_linesize = rrptr_linesize / (bits / 8); \
const type *rptr = (const type *)rrptr + slice_start * rptr_linesize; \
type *dst = (type *)ddst + slice_start * dst_linesize; \
const stype *ptr = (stype *)pptr; \
const float minr = 2.f * s->min_radius + 1.f; \
const float maxr = 2.f * s->max_radius + 1.f; \
const float scaler = (maxr - minr) / ((1 << ddepth) - 1); \
\
for (int y = slice_start; y < slice_end; y++) { \
for (int x = 0; x < w; x++) { \
const float radiusf = minr + (FFMAX(0.f, 2 * rptr[x] + 1 - minr)) * scaler; \
const int radius = floorf(radiusf); \
const float factor = radiusf - radius; \
const int nradius = radius + 1; \
const int l = FFMIN(radius, x); \
const int r = FFMIN(radius, w - x - 1); \
const int t = FFMIN(radius, y); \
const int b = FFMIN(radius, h - y - 1); \
const int nl = FFMIN(nradius, x); \
const int nr = FFMIN(nradius, w - x - 1); \
const int nt = FFMIN(nradius, y); \
const int nb = FFMIN(nradius, h - y - 1); \
stype tl = ptr[(y - t) * ptr_linesize + x - l]; \
stype tr = ptr[(y - t) * ptr_linesize + x + r]; \
stype bl = ptr[(y + b) * ptr_linesize + x - l]; \
stype br = ptr[(y + b) * ptr_linesize + x + r]; \
stype ntl = ptr[(y - nt) * ptr_linesize + x - nl]; \
stype ntr = ptr[(y - nt) * ptr_linesize + x + nr]; \
stype nbl = ptr[(y + nb) * ptr_linesize + x - nl]; \
stype nbr = ptr[(y + nb) * ptr_linesize + x + nr]; \
stype div = (l + r) * (t + b); \
stype ndiv = (nl + nr) * (nt + nb); \
stype p0 = (br + tl - bl - tr) / div; \
stype n0 = (nbr + ntl - nbl - ntr) / ndiv; \
\
dst[x] = av_clip_uintp2_c(lrintf( \
lerpf(p0, n0, factor)), \
ddepth); \
} \
\
rptr += rptr_linesize; \
dst += dst_linesize; \
} \
\
return 0; \
}
BLUR_PLANE(uint8_t, uint32_t, 8)
BLUR_PLANE(uint16_t, uint64_t, 16)
static int blur_planes(AVFilterContext *ctx, void *arg,
int jobnr, int nb_jobs)
{
VarBlurContext *s = ctx->priv;
ThreadData *td = arg;
AVFrame *radius = td->radius;
AVFrame *out = td->out;
AVFrame *in = td->in;
for (int plane = 0; plane < s->nb_planes; plane++) {
const int height = s->planeheight[plane];
const int slice_start = (height * jobnr) / nb_jobs;
const int slice_end = (height * (jobnr+1)) / nb_jobs;
const int width = s->planewidth[plane];
const int linesize = in->linesize[plane];
const int dst_linesize = out->linesize[plane];
const uint8_t *rptr = radius->data[plane];
const int rptr_linesize = radius->linesize[plane];
uint8_t *ptr = s->sat->data[plane];
const int ptr_linesize = s->sat->linesize[plane];
const uint8_t *src = in->data[plane];
uint8_t *dst = out->data[plane];
if (!(s->planes & (1 << plane))) {
if (out != in)
av_image_copy_plane(dst + slice_start * dst_linesize,
dst_linesize,
src + slice_start * linesize,
linesize,
width * ((s->depth + 7) / 8),
slice_end - slice_start);
continue;
}
s->blur_plane(ctx, dst, dst_linesize,
rptr, rptr_linesize,
width, height,
ptr, ptr_linesize,
slice_start, slice_end);
}
return 0;
}
static int blur_frame(AVFilterContext *ctx, AVFrame *in, AVFrame *radius)
{
VarBlurContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
ThreadData td;
AVFrame *out;
if (av_frame_is_writable(in)) {
out = in;
} else {
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);
}
for (int plane = 0; plane < s->nb_planes; plane++) {
const int height = s->planeheight[plane];
const int width = s->planewidth[plane];
const int linesize = in->linesize[plane];
uint8_t *ptr = s->sat->data[plane];
const int ptr_linesize = s->sat->linesize[plane];
const uint8_t *src = in->data[plane];
if (!(s->planes & (1 << plane)))
continue;
s->compute_sat(src, linesize, width, height, ptr, ptr_linesize);
}
td.in = in;
td.out = out;
td.radius = radius;
ff_filter_execute(ctx, blur_planes, &td, NULL,
FFMIN(s->planeheight[1], ff_filter_get_nb_threads(ctx)));
if (out != in)
av_frame_free(&in);
return ff_filter_frame(outlink, out);
}
static int activate(AVFilterContext *ctx)
{
VarBlurContext *s = ctx->priv;
return ff_framesync_activate(&s->fs);
}
static int varblur_frame(FFFrameSync *fs)
{
AVFilterContext *ctx = fs->parent;
VarBlurContext *s = ctx->priv;
AVFrame *in, *radius;
int ret;
if (s->max_radius <= s->min_radius)
s->max_radius = s->min_radius + 1;
ret = ff_framesync_dualinput_get(fs, &in, &radius);
if (ret < 0)
return ret;
if (!radius)
return ff_filter_frame(ctx->outputs[0], in);
return blur_frame(ctx, in, radius);
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
AVFilterLink *inlink = ctx->inputs[0];
AVFilterLink *radiuslink = ctx->inputs[1];
VarBlurContext *s = ctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format);
int ret;
if (inlink->w != radiuslink->w || inlink->h != radiuslink->h) {
av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
"(size %dx%d) do not match the corresponding "
"second input link %s parameters (size %dx%d)\n",
ctx->input_pads[0].name, inlink->w, inlink->h,
ctx->input_pads[1].name, radiuslink->w, radiuslink->h);
return AVERROR(EINVAL);
}
outlink->w = inlink->w;
outlink->h = inlink->h;
outlink->time_base = inlink->time_base;
outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
outlink->frame_rate = inlink->frame_rate;
s->depth = desc->comp[0].depth;
s->blur_plane = s->depth <= 8 ? blur_plane8 : blur_plane16;
s->compute_sat = s->depth <= 8 ? compute_sat8 : compute_sat16;
s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(outlink->w, desc->log2_chroma_w);
s->planewidth[0] = s->planewidth[3] = outlink->w;
s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(outlink->h, desc->log2_chroma_h);
s->planeheight[0] = s->planeheight[3] = outlink->h;
s->nb_planes = av_pix_fmt_count_planes(outlink->format);
s->sat = ff_get_video_buffer(outlink, (outlink->w + 1) * 4 * ((s->depth + 7) / 8), outlink->h + 1);
if (!s->sat)
return AVERROR(ENOMEM);
s->fs.on_event = varblur_frame;
if ((ret = ff_framesync_init_dualinput(&s->fs, ctx)) < 0)
return ret;
ret = ff_framesync_configure(&s->fs);
outlink->time_base = s->fs.time_base;
return ret;
}
static av_cold void uninit(AVFilterContext *ctx)
{
VarBlurContext *s = ctx->priv;
ff_framesync_uninit(&s->fs);
av_frame_free(&s->sat);
}
static const AVFilterPad varblur_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
{
.name = "radius",
.type = AVMEDIA_TYPE_VIDEO,
},
};
static const AVFilterPad varblur_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
};
const AVFilter ff_vf_varblur = {
.name = "varblur",
.description = NULL_IF_CONFIG_SMALL("Apply Variable Blur filter."),
.priv_size = sizeof(VarBlurContext),
.priv_class = &varblur_class,
.activate = activate,
.preinit = varblur_framesync_preinit,
.uninit = uninit,
FILTER_INPUTS(varblur_inputs),
FILTER_OUTPUTS(varblur_outputs),
FILTER_PIXFMTS_ARRAY(pix_fmts),
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
AVFILTER_FLAG_SLICE_THREADS,
.process_command = ff_filter_process_command,
};