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FFmpeg/libavfilter/vf_owdenoise.c
Andreas Rheinhardt b4f5201967 avfilter: Replace query_formats callback with union of list and callback 
If one looks at the many query_formats callbacks in existence,
one will immediately recognize that there is one type of default
callback for video and a slightly different default callback for
audio: It is "return ff_set_common_formats_from_list(ctx, pix_fmts);"
for video with a filter-specific pix_fmts list. For audio, it is
the same with a filter-specific sample_fmts list together with
ff_set_common_all_samplerates() and ff_set_common_all_channel_counts().

This commit allows to remove the boilerplate query_formats callbacks
by replacing said callback with a union consisting the old callback
and pointers for pixel and sample format arrays. For the not uncommon
case in which these lists only contain a single entry (besides the
sentinel) enum AVPixelFormat and enum AVSampleFormat fields are also
added to the union to store them directly in the AVFilter,
thereby avoiding a relocation.

The state of said union will be contained in a new, dedicated AVFilter
field (the nb_inputs and nb_outputs fields have been shrunk to uint8_t
in order to create a hole for this new field; this is no problem, as
the maximum of all the nb_inputs is four; for nb_outputs it is only
two).

The state's default value coincides with the earlier default of
query_formats being unset, namely that the filter accepts all formats
(and also sample rates and channel counts/layouts for audio)
provided that these properties agree coincide for all inputs and
outputs.

By using different union members for audio and video filters
the type-unsafety of using the same functions for audio and video
lists will furthermore be more confined to formats.c than before.

When the new fields are used, they will also avoid allocations:
Currently something nearly equivalent to ff_default_query_formats()
is called after every successful call to a query_formats callback;
yet in the common case that the newly allocated AVFilterFormats
are not used at all (namely if there are no free links) these newly
allocated AVFilterFormats are freed again without ever being used.
Filters no longer using the callback will not exhibit this any more.

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2021-10-05 17:48:25 +02:00

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/*
* Copyright (c) 2007 Michael Niedermayer <michaelni@gmx.at>
* Copyright (c) 2013 Clément Bœsch <u pkh me>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU 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.
*/
/**
* @todo try to change to int
* @todo try lifting based implementation
* @todo optimize optimize optimize
* @todo hard thresholding
* @todo use QP to decide filter strength
* @todo wavelet normalization / least squares optimal signal vs. noise thresholds
*/
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/mem_internal.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "internal.h"
typedef struct OWDenoiseContext {
const AVClass *class;
double luma_strength;
double chroma_strength;
int depth;
float *plane[16+1][4];
int linesize;
int hsub, vsub;
int pixel_depth;
} OWDenoiseContext;
#define OFFSET(x) offsetof(OWDenoiseContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption owdenoise_options[] = {
{ "depth", "set depth", OFFSET(depth), AV_OPT_TYPE_INT, {.i64 = 8}, 8, 16, FLAGS },
{ "luma_strength", "set luma strength", OFFSET(luma_strength), AV_OPT_TYPE_DOUBLE, {.dbl = 1.0}, 0, 1000, FLAGS },
{ "ls", "set luma strength", OFFSET(luma_strength), AV_OPT_TYPE_DOUBLE, {.dbl = 1.0}, 0, 1000, FLAGS },
{ "chroma_strength", "set chroma strength", OFFSET(chroma_strength), AV_OPT_TYPE_DOUBLE, {.dbl = 1.0}, 0, 1000, FLAGS },
{ "cs", "set chroma strength", OFFSET(chroma_strength), AV_OPT_TYPE_DOUBLE, {.dbl = 1.0}, 0, 1000, FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(owdenoise);
DECLARE_ALIGNED(8, static const uint8_t, dither)[8][8] = {
{ 0, 48, 12, 60, 3, 51, 15, 63 },
{ 32, 16, 44, 28, 35, 19, 47, 31 },
{ 8, 56, 4, 52, 11, 59, 7, 55 },
{ 40, 24, 36, 20, 43, 27, 39, 23 },
{ 2, 50, 14, 62, 1, 49, 13, 61 },
{ 34, 18, 46, 30, 33, 17, 45, 29 },
{ 10, 58, 6, 54, 9, 57, 5, 53 },
{ 42, 26, 38, 22, 41, 25, 37, 21 },
};
static const double coeff[2][5] = {
{
0.6029490182363579 * M_SQRT2,
0.2668641184428723 * M_SQRT2,
-0.07822326652898785 * M_SQRT2,
-0.01686411844287495 * M_SQRT2,
0.02674875741080976 * M_SQRT2,
},{
1.115087052456994 / M_SQRT2,
-0.5912717631142470 / M_SQRT2,
-0.05754352622849957 / M_SQRT2,
0.09127176311424948 / M_SQRT2,
}
};
static const double icoeff[2][5] = {
{
1.115087052456994 / M_SQRT2,
0.5912717631142470 / M_SQRT2,
-0.05754352622849957 / M_SQRT2,
-0.09127176311424948 / M_SQRT2,
},{
0.6029490182363579 * M_SQRT2,
-0.2668641184428723 * M_SQRT2,
-0.07822326652898785 * M_SQRT2,
0.01686411844287495 * M_SQRT2,
0.02674875741080976 * M_SQRT2,
}
};
static inline void decompose(float *dst_l, float *dst_h, const float *src,
int linesize, int w)
{
int x, i;
for (x = 0; x < w; x++) {
double sum_l = src[x * linesize] * coeff[0][0];
double sum_h = src[x * linesize] * coeff[1][0];
for (i = 1; i <= 4; i++) {
const double s = src[avpriv_mirror(x - i, w - 1) * linesize]
+ src[avpriv_mirror(x + i, w - 1) * linesize];
sum_l += coeff[0][i] * s;
sum_h += coeff[1][i] * s;
}
dst_l[x * linesize] = sum_l;
dst_h[x * linesize] = sum_h;
}
}
static inline void compose(float *dst, const float *src_l, const float *src_h,
int linesize, int w)
{
int x, i;
for (x = 0; x < w; x++) {
double sum_l = src_l[x * linesize] * icoeff[0][0];
double sum_h = src_h[x * linesize] * icoeff[1][0];
for (i = 1; i <= 4; i++) {
const int x0 = avpriv_mirror(x - i, w - 1) * linesize;
const int x1 = avpriv_mirror(x + i, w - 1) * linesize;
sum_l += icoeff[0][i] * (src_l[x0] + src_l[x1]);
sum_h += icoeff[1][i] * (src_h[x0] + src_h[x1]);
}
dst[x * linesize] = (sum_l + sum_h) * 0.5;
}
}
static inline void decompose2D(float *dst_l, float *dst_h, const float *src,
int xlinesize, int ylinesize,
int step, int w, int h)
{
int y, x;
for (y = 0; y < h; y++)
for (x = 0; x < step; x++)
decompose(dst_l + ylinesize*y + xlinesize*x,
dst_h + ylinesize*y + xlinesize*x,
src + ylinesize*y + xlinesize*x,
step * xlinesize, (w - x + step - 1) / step);
}
static inline void compose2D(float *dst, const float *src_l, const float *src_h,
int xlinesize, int ylinesize,
int step, int w, int h)
{
int y, x;
for (y = 0; y < h; y++)
for (x = 0; x < step; x++)
compose(dst + ylinesize*y + xlinesize*x,
src_l + ylinesize*y + xlinesize*x,
src_h + ylinesize*y + xlinesize*x,
step * xlinesize, (w - x + step - 1) / step);
}
static void decompose2D2(float *dst[4], float *src, float *temp[2],
int linesize, int step, int w, int h)
{
decompose2D(temp[0], temp[1], src, 1, linesize, step, w, h);
decompose2D( dst[0], dst[1], temp[0], linesize, 1, step, h, w);
decompose2D( dst[2], dst[3], temp[1], linesize, 1, step, h, w);
}
static void compose2D2(float *dst, float *src[4], float *temp[2],
int linesize, int step, int w, int h)
{
compose2D(temp[0], src[0], src[1], linesize, 1, step, h, w);
compose2D(temp[1], src[2], src[3], linesize, 1, step, h, w);
compose2D(dst, temp[0], temp[1], 1, linesize, step, w, h);
}
static void filter(OWDenoiseContext *s,
uint8_t *dst, int dst_linesize,
const uint8_t *src, int src_linesize,
int width, int height, double strength)
{
int x, y, i, j, depth = s->depth;
while (1<<depth > width || 1<<depth > height)
depth--;
if (s->pixel_depth <= 8) {
for (y = 0; y < height; y++)
for(x = 0; x < width; x++)
s->plane[0][0][y*s->linesize + x] = src[y*src_linesize + x];
} else {
const uint16_t *src16 = (const uint16_t *)src;
src_linesize /= 2;
for (y = 0; y < height; y++)
for(x = 0; x < width; x++)
s->plane[0][0][y*s->linesize + x] = src16[y*src_linesize + x];
}
for (i = 0; i < depth; i++)
decompose2D2(s->plane[i + 1], s->plane[i][0], s->plane[0] + 1, s->linesize, 1<<i, width, height);
for (i = 0; i < depth; i++) {
for (j = 1; j < 4; j++) {
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
double v = s->plane[i + 1][j][y*s->linesize + x];
if (v > strength) v -= strength;
else if (v < -strength) v += strength;
else v = 0;
s->plane[i + 1][j][x + y*s->linesize] = v;
}
}
}
}
for (i = depth-1; i >= 0; i--)
compose2D2(s->plane[i][0], s->plane[i + 1], s->plane[0] + 1, s->linesize, 1<<i, width, height);
if (s->pixel_depth <= 8) {
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
i = s->plane[0][0][y*s->linesize + x] + dither[x&7][y&7]*(1.0/64) + 1.0/128; // yes the rounding is insane but optimal :)
if ((unsigned)i > 255U) i = ~(i >> 31);
dst[y*dst_linesize + x] = i;
}
}
} else {
uint16_t *dst16 = (uint16_t *)dst;
dst_linesize /= 2;
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
i = s->plane[0][0][y*s->linesize + x];
dst16[y*dst_linesize + x] = i;
}
}
}
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
OWDenoiseContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *out;
const int cw = AV_CEIL_RSHIFT(inlink->w, s->hsub);
const int ch = AV_CEIL_RSHIFT(inlink->h, s->vsub);
if (av_frame_is_writable(in)) {
out = in;
if (s->luma_strength > 0)
filter(s, out->data[0], out->linesize[0], in->data[0], in->linesize[0], inlink->w, inlink->h, s->luma_strength);
if (s->chroma_strength > 0) {
filter(s, out->data[1], out->linesize[1], in->data[1], in->linesize[1], cw, ch, s->chroma_strength);
filter(s, out->data[2], out->linesize[2], in->data[2], in->linesize[2], cw, ch, s->chroma_strength);
}
} 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);
if (s->luma_strength > 0) {
filter(s, out->data[0], out->linesize[0], in->data[0], in->linesize[0], inlink->w, inlink->h, s->luma_strength);
} else {
av_image_copy_plane(out->data[0], out->linesize[0], in ->data[0], in ->linesize[0], inlink->w, inlink->h);
}
if (s->chroma_strength > 0) {
filter(s, out->data[1], out->linesize[1], in->data[1], in->linesize[1], cw, ch, s->chroma_strength);
filter(s, out->data[2], out->linesize[2], in->data[2], in->linesize[2], cw, ch, s->chroma_strength);
} else {
av_image_copy_plane(out->data[1], out->linesize[1], in ->data[1], in ->linesize[1], inlink->w, inlink->h);
av_image_copy_plane(out->data[2], out->linesize[2], in ->data[2], in ->linesize[2], inlink->w, inlink->h);
}
if (in->data[3])
av_image_copy_plane(out->data[3], out->linesize[3],
in ->data[3], in ->linesize[3],
inlink->w, inlink->h);
av_frame_free(&in);
}
return ff_filter_frame(outlink, out);
}
static int query_formats(AVFilterContext *ctx)
{
static const enum AVPixelFormat pix_fmts[] = {
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_YUVA444P, AV_PIX_FMT_YUVA422P,
AV_PIX_FMT_YUVA420P,
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_NONE
};
return ff_set_common_formats_from_list(ctx, pix_fmts);
}
static int config_input(AVFilterLink *inlink)
{
int i, j;
OWDenoiseContext *s = inlink->dst->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
const int h = FFALIGN(inlink->h, 16);
s->hsub = desc->log2_chroma_w;
s->vsub = desc->log2_chroma_h;
s->pixel_depth = desc->comp[0].depth;
s->linesize = FFALIGN(inlink->w, 16);
for (j = 0; j < 4; j++) {
for (i = 0; i <= s->depth; i++) {
s->plane[i][j] = av_malloc_array(s->linesize, h * sizeof(s->plane[0][0][0]));
if (!s->plane[i][j])
return AVERROR(ENOMEM);
}
}
return 0;
}
static av_cold void uninit(AVFilterContext *ctx)
{
int i, j;
OWDenoiseContext *s = ctx->priv;
for (j = 0; j < 4; j++)
for (i = 0; i <= s->depth; i++)
av_freep(&s->plane[i][j]);
}
static const AVFilterPad owdenoise_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
.config_props = config_input,
},
};
static const AVFilterPad owdenoise_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
};
const AVFilter ff_vf_owdenoise = {
.name = "owdenoise",
.description = NULL_IF_CONFIG_SMALL("Denoise using wavelets."),
.priv_size = sizeof(OWDenoiseContext),
.uninit = uninit,
FILTER_INPUTS(owdenoise_inputs),
FILTER_OUTPUTS(owdenoise_outputs),
FILTER_QUERY_FUNC(query_formats),
.priv_class = &owdenoise_class,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
};
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