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avfilter: add pixelize video filter

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This commit is contained in:
Paul B Mahol 2022-04-12 09:08:11 +02:00
parent 7e81295488
commit 391ce570c8
6 changed files with 384 additions and 1 deletions
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1
Changelog
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@ -10,6 +10,7 @@ version 5.1:
- Vizrt Binary Image encoder/decoder
- avsynctest source filter
- feedback video filter
- pixelize video filter
version 5.0:

29
doc/filters.texi
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@ -17863,6 +17863,35 @@ format=monow, pixdesctest
can be used to test the monowhite pixel format descriptor definition.
@section pixelize
Apply pixelization to video stream.
The filter accepts the following options:
@table @option
@item width, w
@item height, h
Set block dimensions that will be used for pixelization.
Default value is @code{16}.
@item mode, m
Set the mode of pixelization used.
Possible values are:
@table @samp
@item avg
@item min
@item max
@end table
Default value is @code{avg}.
@item planes, p
Set what planes to filter. Default is to filter all planes.
@end table
@subsection Commands
This filter supports all options as @ref{commands}.
@section pixscope
Display sample values of color channels. Mainly useful for checking color

1
libavfilter/Makefile
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@ -391,6 +391,7 @@ OBJS-$(CONFIG_PERSPECTIVE_FILTER) += vf_perspective.o
OBJS-$(CONFIG_PHASE_FILTER) += vf_phase.o
OBJS-$(CONFIG_PHOTOSENSITIVITY_FILTER) += vf_photosensitivity.o
OBJS-$(CONFIG_PIXDESCTEST_FILTER) += vf_pixdesctest.o
OBJS-$(CONFIG_PIXELIZE_FILTER) += vf_pixelize.o
OBJS-$(CONFIG_PIXSCOPE_FILTER) += vf_datascope.o
OBJS-$(CONFIG_PP_FILTER) += vf_pp.o qp_table.o
OBJS-$(CONFIG_PP7_FILTER) += vf_pp7.o qp_table.o

1
libavfilter/allfilters.c
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@ -373,6 +373,7 @@ extern const AVFilter ff_vf_perspective;
extern const AVFilter ff_vf_phase;
extern const AVFilter ff_vf_photosensitivity;
extern const AVFilter ff_vf_pixdesctest;
extern const AVFilter ff_vf_pixelize;
extern const AVFilter ff_vf_pixscope;
extern const AVFilter ff_vf_pp;
extern const AVFilter ff_vf_pp7;

2
libavfilter/version.h
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@ -31,7 +31,7 @@
#include "version_major.h"
#define LIBAVFILTER_VERSION_MINOR 32
#define LIBAVFILTER_VERSION_MINOR 33
#define LIBAVFILTER_VERSION_MICRO 100

351
libavfilter/vf_pixelize.c Normal file
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@ -0,0 +1,351 @@
/*
* Copyright (c) 2022 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/common.h"
#include "libavutil/internal.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "internal.h"
#include "video.h"
enum PixelizeModes {
PIXELIZE_AVG,
PIXELIZE_MIN,
PIXELIZE_MAX,
PIXELIZE_MODES
};
typedef struct PixelizeContext {
const AVClass *class;
int block_w[4], block_h[4];
int mode;
int depth;
int planes;
int nb_planes;
int linesize[4];
int planewidth[4];
int planeheight[4];
int log2_chroma_w;
int log2_chroma_h;
int (*pixelize[PIXELIZE_MODES])(const uint8_t *src, uint8_t *dst,
ptrdiff_t src_linesize,
ptrdiff_t dst_linesize,
int w, int h);
} PixelizeContext;
static const enum AVPixelFormat pix_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
};
typedef struct ThreadData {
AVFrame *in, *out;
} ThreadData;
#define PIXELIZE_AVG(name, type, stype) \
static int pixelize_avg##name(const uint8_t *ssrc, uint8_t *ddst, \
ptrdiff_t src_linesize, ptrdiff_t dst_linesize, \
int w, int h) \
{ \
const type *src = (const type *)ssrc; \
type *dst = (type *)ddst; \
stype sum = 0; \
type fill; \
for (int y = 0; y < h; y++) { \
for (int x = 0; x < w; x++) \
sum += src[x]; \
\
src += src_linesize / sizeof(type); \
} \
\
fill = sum / (w * h); \
\
for (int y = 0; y < h; y++) { \
for (int x = 0; x < w; x++) \
dst[x] = fill; \
\
dst += dst_linesize / sizeof(type); \
} \
\
return 0; \
}
#define PIXELIZE_MIN(name, type, stype) \
static int pixelize_min##name(const uint8_t *ssrc, uint8_t *ddst, \
ptrdiff_t src_linesize, ptrdiff_t dst_linesize, \
int w, int h) \
{ \
const type *src = (const type *)ssrc; \
type *dst = (type *)ddst; \
type fill = src[0]; \
\
for (int y = 0; y < h; y++) { \
for (int x = 0; x < w; x++) \
fill = FFMIN(src[x], fill); \
\
src += src_linesize / sizeof(type); \
} \
\
for (int y = 0; y < h; y++) { \
for (int x = 0; x < w; x++) \
dst[x] = fill; \
\
dst += dst_linesize / sizeof(type); \
} \
\
return 0; \
}
#define PIXELIZE_MAX(name, type, stype) \
static int pixelize_max##name(const uint8_t *ssrc, uint8_t *ddst, \
ptrdiff_t src_linesize, ptrdiff_t dst_linesize, \
int w, int h) \
{ \
const type *src = (const type *)ssrc; \
type *dst = (type *)ddst; \
type fill = src[0]; \
\
for (int y = 0; y < h; y++) { \
for (int x = 0; x < w; x++) \
fill = FFMAX(src[x], fill); \
\
src += src_linesize / sizeof(type); \
} \
\
for (int y = 0; y < h; y++) { \
for (int x = 0; x < w; x++) \
dst[x] = fill; \
\
dst += dst_linesize / sizeof(type); \
} \
\
return 0; \
}
PIXELIZE_AVG(8, uint8_t, unsigned)
PIXELIZE_AVG(16, uint16_t, uint64_t)
PIXELIZE_MIN(8, uint8_t, unsigned)
PIXELIZE_MIN(16, uint16_t, uint64_t)
PIXELIZE_MAX(8, uint8_t, unsigned)
PIXELIZE_MAX(16, uint16_t, uint64_t)
static int pixelize_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
PixelizeContext *s = ctx->priv;
const int mode = s->mode;
ThreadData *td = arg;
AVFrame *out = td->out;
AVFrame *in = td->in;
for (int p = 0; p < s->nb_planes; p++) {
const int wh = s->planeheight[p];
const int h = (s->planeheight[p] + s->block_h[p] - 1) / s->block_h[p];
const int w = (s->planewidth[p] + s->block_w[p] - 1) / s->block_w[p];
const int wslice_start = (wh * jobnr) / nb_jobs;
const int wslice_end = (wh * (jobnr+1)) / nb_jobs;
const int slice_start = (h * jobnr) / nb_jobs;
const int slice_end = (h * (jobnr+1)) / nb_jobs;
const ptrdiff_t out_linesize = out->linesize[p];
const ptrdiff_t in_linesize = in->linesize[p];
const uint8_t *src = in->data[p];
uint8_t *dst = out->data[p];
if (!((1 << p) & s->planes)) {
av_image_copy_plane(dst + wslice_start * out_linesize,
out_linesize,
src + wslice_start * in_linesize,
in_linesize,
s->linesize[p], wslice_end - wslice_start);
continue;
}
for (int y = slice_start; y < slice_end; y++) {
const int block_h = FFMIN(s->block_h[p], s->planeheight[p] - y * s->block_h[p]);
for (int x = 0; x < w; x++) {
const int block_w = FFMIN(s->block_w[p], s->planewidth[p] - x * s->block_w[p]);
s->pixelize[mode](src + s->block_h[p] * y * in_linesize +
x * s->block_w[p] * (1 + (s->depth > 8)),
dst + s->block_h[p] * y * out_linesize +
x * s->block_w[p] * (1 + (s->depth > 8)),
in_linesize, out_linesize, block_w, block_h);
}
}
}
return 0;
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
PixelizeContext *s = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
const AVPixFmtDescriptor *desc;
int ret;
desc = av_pix_fmt_desc_get(outlink->format);
if (!desc)
return AVERROR_BUG;
s->nb_planes = av_pix_fmt_count_planes(outlink->format);
s->depth = desc->comp[0].depth;
if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
return ret;
s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
s->planewidth[0] = s->planewidth[3] = inlink->w;
s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
s->planeheight[0] = s->planeheight[3] = inlink->h;
s->log2_chroma_w = desc->log2_chroma_w;
s->log2_chroma_h = desc->log2_chroma_h;
s->pixelize[PIXELIZE_AVG] = s->depth <= 8 ? pixelize_avg8 : pixelize_avg16;
s->pixelize[PIXELIZE_MIN] = s->depth <= 8 ? pixelize_min8 : pixelize_min16;
s->pixelize[PIXELIZE_MAX] = s->depth <= 8 ? pixelize_max8 : pixelize_max16;
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = ctx->outputs[0];
PixelizeContext *s = ctx->priv;
ThreadData td;
AVFrame *out;
int ret;
s->block_w[1] = s->block_w[2] = FFMAX(1, s->block_w[0] >> s->log2_chroma_w);
s->block_w[3] = s->block_w[0] = s->block_w[1] << s->log2_chroma_w;
s->block_h[1] = s->block_h[2] = FFMAX(1, s->block_h[0] >> s->log2_chroma_h);
s->block_h[3] = s->block_h[0] = s->block_h[1] << s->log2_chroma_h;
if (av_frame_is_writable(in)) {
out = in;
} else {
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out) {
ret = AVERROR(ENOMEM);
goto fail;
}
ret = av_frame_copy_props(out, in);
if (ret < 0) {
av_frame_free(&out);
goto fail;
}
}
td.out = out;
td.in = in;
ff_filter_execute(ctx, pixelize_slice, &td, NULL,
FFMIN((s->planeheight[1] + s->block_h[1] - 1) / s->block_h[1],
ff_filter_get_nb_threads(ctx)));
if (out != in)
av_frame_free(&in);
return ff_filter_frame(outlink, out);
fail:
av_frame_free(&in);
return ret;
}
#define OFFSET(x) offsetof(PixelizeContext, x)
#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_RUNTIME_PARAM)
static const AVOption pixelize_options[] = {
{ "width", "set block width", OFFSET(block_w[0]), AV_OPT_TYPE_INT, {.i64=16}, 1, 1024, FLAGS },
{ "w", "set block width", OFFSET(block_w[0]), AV_OPT_TYPE_INT, {.i64=16}, 1, 1024, FLAGS },
{ "height", "set block height", OFFSET(block_h[0]), AV_OPT_TYPE_INT, {.i64=16}, 1, 1024, FLAGS },
{ "h", "set block height", OFFSET(block_h[0]), AV_OPT_TYPE_INT, {.i64=16}, 1, 1024, FLAGS },
{ "mode", "set the pixelize mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, 0, PIXELIZE_MODES-1, FLAGS, "mode" },
{ "m", "set the pixelize mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, 0, PIXELIZE_MODES-1, FLAGS, "mode" },
{ "avg", "average", 0, AV_OPT_TYPE_CONST, {.i64=PIXELIZE_AVG}, 0, 0, FLAGS, "mode" },
{ "min", "minimum", 0, AV_OPT_TYPE_CONST, {.i64=PIXELIZE_MIN}, 0, 0, FLAGS, "mode" },
{ "max", "maximum", 0, AV_OPT_TYPE_CONST, {.i64=PIXELIZE_MAX}, 0, 0, FLAGS, "mode" },
{ "planes", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=15}, 0, 15, FLAGS },
{ "p", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=15}, 0, 15, FLAGS },
{ NULL },
};
AVFILTER_DEFINE_CLASS(pixelize);
static const AVFilterPad pixelize_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
},
};
static const AVFilterPad pixelize_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
};
const AVFilter ff_vf_pixelize = {
.name = "pixelize",
.description = NULL_IF_CONFIG_SMALL("Pixelize video."),
.priv_size = sizeof(PixelizeContext),
.priv_class = &pixelize_class,
FILTER_INPUTS(pixelize_inputs),
FILTER_OUTPUTS(pixelize_outputs),
FILTER_PIXFMTS_ARRAY(pix_fmts),
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
.process_command = ff_filter_process_command,
};