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avfilter: add bitplanenoise filter

This commit is contained in:
Paul B Mahol 2016-08-14 18:10:55 +02:00
parent f85842b09e
commit ed8d7e7a9b
6 changed files with 246 additions and 1 deletions
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1
Changelog
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@ -15,6 +15,7 @@ version <next>:
- True Audio (TTA) muxer
- crystalizer audio filter
- acrusher audio filter
- bitplanenoise video filter
version 3.1:

15
doc/filters.texi
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@ -4410,6 +4410,21 @@ The filter accepts the following option:
Set the minimal luminance value. Default is @code{16}.
@end table
@section bitplanenoise
Show and measure bit plane noise.
The filter accepts the following options:
@table @option
@item bitplane
Set which plane to analyze. Default is @code{1}.
@item filter
Filter out noisy pixels from @code{bitplane} set above.
Default is disabled.
@end table
@section blackdetect
Detect video intervals that are (almost) completely black. Can be

1
libavfilter/Makefile
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@ -125,6 +125,7 @@ OBJS-$(CONFIG_ALPHAMERGE_FILTER) += vf_alphamerge.o
OBJS-$(CONFIG_ATADENOISE_FILTER) += vf_atadenoise.o
OBJS-$(CONFIG_BBOX_FILTER) += bbox.o vf_bbox.o
OBJS-$(CONFIG_BENCH_FILTER) += f_bench.o
OBJS-$(CONFIG_BITPLANENOISE_FILTER) += vf_bitplanenoise.o
OBJS-$(CONFIG_BLACKDETECT_FILTER) += vf_blackdetect.o
# video filters

1
libavfilter/allfilters.c
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@ -143,6 +143,7 @@ void avfilter_register_all(void)
REGISTER_FILTER(ASS, ass, vf);
REGISTER_FILTER(BENCH, bench, vf);
REGISTER_FILTER(BBOX, bbox, vf);
REGISTER_FILTER(BITPLANENOISE, bitplanenoise, vf);
REGISTER_FILTER(BLACKDETECT, blackdetect, vf);
REGISTER_FILTER(BLACKFRAME, blackframe, vf);
REGISTER_FILTER(BLEND, blend, vf);

2
libavfilter/version.h
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@ -30,7 +30,7 @@
#include "libavutil/version.h"
#define LIBAVFILTER_VERSION_MAJOR 6
#define LIBAVFILTER_VERSION_MINOR 51
#define LIBAVFILTER_VERSION_MINOR 52
#define LIBAVFILTER_VERSION_MICRO 100
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \

227
libavfilter/vf_bitplanenoise.c Normal file
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@ -0,0 +1,227 @@
/*
* Copyright (c) 2016 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/opt.h"
#include "libavutil/imgutils.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
typedef struct BPNContext {
const AVClass *class;
int bitplane;
int filter;
int nb_planes;
int planeheight[4];
int planewidth[4];
int depth;
} BPNContext;
#define OFFSET(x) offsetof(BPNContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption bitplanenoise_options[] = {
{ "bitplane", "set bit plane to use for measuring noise", OFFSET(bitplane), AV_OPT_TYPE_INT, {.i64=1}, 1, 16, FLAGS},
{ "filter", "show noisy pixels", OFFSET(filter), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
{ NULL }
};
AVFILTER_DEFINE_CLASS(bitplanenoise);
static int query_formats(AVFilterContext *ctx)
{
static const enum AVPixelFormat pixfmts[] = {
AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P,
AV_PIX_FMT_YUV440P,
AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,
AV_PIX_FMT_YUVJ440P,
AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV420P9,
AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV420P10,
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_YUV444P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV420P16,
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_GRAY8,
AV_PIX_FMT_GRAY16,
AV_PIX_FMT_NONE
};
AVFilterFormats *formats = ff_make_format_list(pixfmts);
if (!formats)
return AVERROR(ENOMEM);
return ff_set_common_formats(ctx, formats);
}
static int config_input(AVFilterLink *inlink)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
AVFilterContext *ctx = inlink->dst;
BPNContext *s = ctx->priv;
s->nb_planes = desc->nb_components;
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;
return 0;
}
#define CHECK_BIT(x, a, b, c) { \
bit = (((val[(x)] & mask) == (val[(x) + (a)] & mask)) + \
((val[(x)] & mask) == (val[(x) + (b)] & mask)) + \
((val[(x)] & mask) == (val[(x) + (c)] & mask))) > 1; \
if (dst) \
dst[(x)] = factor * bit; \
stats[plane] += bit; }
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = ctx->outputs[0];
BPNContext *s = ctx->priv;
const int mask = (1 << (s->bitplane - 1));
const int factor = (1 << s->depth) - 1;
float stats[4] = { 0 };
char metabuf[128];
int plane, y, x, bit;
AVFrame *out = s->filter ? NULL : in;
if (!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);
}
if (s->depth <= 8) {
for (plane = 0; plane < s->nb_planes; plane++) {
const int linesize = in->linesize[plane];
const int dlinesize = out->linesize[plane];
uint8_t *val = in->data[plane];
uint8_t *dst = s->filter ? out->data[plane]: NULL;
for (y = 0; y < s->planeheight[plane] - 1; y++) {
CHECK_BIT(0, 1, 1 + linesize, linesize)
for (x = 1; x < s->planewidth[plane] - 1; x++) {
CHECK_BIT(x, -1, 1, linesize)
}
CHECK_BIT(x, -1, -1 + linesize, linesize)
val += linesize;
if (dst)
dst += dlinesize;
}
CHECK_BIT(0, 1, 1 - linesize, -linesize)
for (x = 1; x < s->planewidth[plane] - 1; x++) {
CHECK_BIT(x, -1, 1, -linesize)
}
CHECK_BIT(x, -1, -1 - linesize, -linesize)
}
} else {
for (plane = 0; plane < s->nb_planes; plane++) {
const int linesize = in->linesize[plane] / 2;
const int dlinesize = out->linesize[plane] / 2;
uint16_t *val = (uint16_t *)in->data[plane];
uint16_t *dst = s->filter ? (uint16_t *)out->data[plane] : NULL;
val = (uint16_t *)in->data[plane];
for (y = 0; y < s->planeheight[plane] - 1; y++) {
CHECK_BIT(0, 1, 1 + linesize, linesize)
for (x = 1; x < s->planewidth[plane] - 1; x++) {
CHECK_BIT(x, -1, 1, linesize)
}
CHECK_BIT(x, -1, -1 + linesize, linesize)
val += linesize;
if (dst)
dst += dlinesize;
}
CHECK_BIT(0, 1, 1 - linesize, -linesize)
for (x = 1; x < s->planewidth[plane] - 1; x++) {
CHECK_BIT(x, -1, 1, -linesize)
}
CHECK_BIT(x, -1, -1 -linesize, -linesize)
}
}
for (plane = 0; plane < s->nb_planes; plane++) {
char key[32];
stats[plane] /= s->planewidth[plane] * s->planeheight[plane];
snprintf(key, sizeof(key), "lavfi.bitplanenoise.%d.%d", plane, s->bitplane);
snprintf(metabuf, sizeof(metabuf), "%f", 1. - 2.* fabsf((stats[plane] - 0.5)));
av_dict_set(&out->metadata, key, metabuf, 0);
}
if (out != in)
av_frame_free(&in);
return ff_filter_frame(outlink, out);
}
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 ff_vf_bitplanenoise = {
.name = "bitplanenoise",
.description = NULL_IF_CONFIG_SMALL("Measure bit plane noise."),
.priv_size = sizeof(BPNContext),
.query_formats = query_formats,
.inputs = inputs,
.outputs = outputs,
.priv_class = &bitplanenoise_class,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
};