mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
b439ece51c
Make code slightly faster, simpler, clearer. The filter is still slow as hell, and that change won't cause any visible performance improvement (it still takes more than one minute to process a single 1080p frame on a Core 2 here).
434 lines
14 KiB
C
434 lines
14 KiB
C
/*
|
|
* Copyright (c) 2013 Clément Bœsch
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
/**
|
|
* A simple, relatively efficient and extremely slow DCT image denoiser.
|
|
* @see http://www.ipol.im/pub/art/2011/ys-dct/
|
|
*/
|
|
|
|
#include "libavcodec/avfft.h"
|
|
#include "libavutil/eval.h"
|
|
#include "libavutil/opt.h"
|
|
#include "drawutils.h"
|
|
#include "internal.h"
|
|
|
|
#define NBITS 4
|
|
#define BSIZE (1<<(NBITS))
|
|
|
|
static const char *const var_names[] = { "c", NULL };
|
|
enum { VAR_C, VAR_VARS_NB };
|
|
|
|
typedef struct {
|
|
const AVClass *class;
|
|
|
|
/* coefficient factor expression */
|
|
char *expr_str;
|
|
AVExpr *expr;
|
|
double var_values[VAR_VARS_NB];
|
|
|
|
int pr_width, pr_height; // width and height to process
|
|
float sigma; // used when no expression are st
|
|
float th; // threshold (3*sigma)
|
|
float color_dct[3][3]; // 3x3 DCT for color decorrelation
|
|
float *cbuf[2][3]; // two planar rgb color buffers
|
|
float *weights; // dct coeff are cumulated with overlapping; these values are used for averaging
|
|
int p_linesize; // line sizes for color and weights
|
|
int overlap; // number of block overlapping pixels
|
|
int step; // block step increment (BSIZE - overlap)
|
|
DCTContext *dct, *idct; // DCT and inverse DCT contexts
|
|
float *block, *tmp_block; // two BSIZE x BSIZE block buffers
|
|
} DCTdnoizContext;
|
|
|
|
#define OFFSET(x) offsetof(DCTdnoizContext, x)
|
|
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
|
|
static const AVOption dctdnoiz_options[] = {
|
|
{ "sigma", "set noise sigma constant", OFFSET(sigma), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 999, .flags = FLAGS },
|
|
{ "s", "set noise sigma constant", OFFSET(sigma), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 999, .flags = FLAGS },
|
|
{ "overlap", "set number of block overlapping pixels", OFFSET(overlap), AV_OPT_TYPE_INT, {.i64=(1<<NBITS)-1}, 0, (1<<NBITS)-1, .flags = FLAGS },
|
|
{ "expr", "set coefficient factor expression", OFFSET(expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
|
|
{ "e", "set coefficient factor expression", OFFSET(expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
|
|
{ NULL }
|
|
};
|
|
|
|
AVFILTER_DEFINE_CLASS(dctdnoiz);
|
|
|
|
static float *dct_block(DCTdnoizContext *ctx, const float *src, int src_linesize)
|
|
{
|
|
int x, y;
|
|
float *column;
|
|
|
|
for (y = 0; y < BSIZE; y++) {
|
|
float *line = ctx->block;
|
|
|
|
memcpy(line, src, BSIZE * sizeof(*line));
|
|
src += src_linesize;
|
|
av_dct_calc(ctx->dct, line);
|
|
|
|
column = ctx->tmp_block + y;
|
|
column[0] = line[0] * (1. / sqrt(BSIZE));
|
|
column += BSIZE;
|
|
for (x = 1; x < BSIZE; x++) {
|
|
*column = line[x] * sqrt(2. / BSIZE);
|
|
column += BSIZE;
|
|
}
|
|
}
|
|
|
|
column = ctx->tmp_block;
|
|
for (x = 0; x < BSIZE; x++) {
|
|
av_dct_calc(ctx->dct, column);
|
|
column[0] *= 1. / sqrt(BSIZE);
|
|
for (y = 1; y < BSIZE; y++)
|
|
column[y] *= sqrt(2. / BSIZE);
|
|
column += BSIZE;
|
|
}
|
|
|
|
for (y = 0; y < BSIZE; y++)
|
|
for (x = 0; x < BSIZE; x++)
|
|
ctx->block[y*BSIZE + x] = ctx->tmp_block[x*BSIZE + y];
|
|
|
|
return ctx->block;
|
|
}
|
|
|
|
static void idct_block(DCTdnoizContext *ctx, float *dst, int dst_linesize)
|
|
{
|
|
int x, y;
|
|
float *block = ctx->block;
|
|
float *tmp = ctx->tmp_block;
|
|
|
|
for (y = 0; y < BSIZE; y++) {
|
|
block[0] *= sqrt(BSIZE);
|
|
for (x = 1; x < BSIZE; x++)
|
|
block[x] *= 1./sqrt(2. / BSIZE);
|
|
av_dct_calc(ctx->idct, block);
|
|
block += BSIZE;
|
|
}
|
|
|
|
block = ctx->block;
|
|
for (y = 0; y < BSIZE; y++) {
|
|
tmp[0] = block[y] * sqrt(BSIZE);
|
|
for (x = 1; x < BSIZE; x++)
|
|
tmp[x] = block[x*BSIZE + y] * (1./sqrt(2. / BSIZE));
|
|
av_dct_calc(ctx->idct, tmp);
|
|
for (x = 0; x < BSIZE; x++)
|
|
dst[x*dst_linesize + y] += tmp[x];
|
|
}
|
|
}
|
|
|
|
static int config_input(AVFilterLink *inlink)
|
|
{
|
|
AVFilterContext *ctx = inlink->dst;
|
|
DCTdnoizContext *s = ctx->priv;
|
|
int i, x, y, bx, by, linesize, *iweights;
|
|
const float dct_3x3[3][3] = {
|
|
{ 1./sqrt(3), 1./sqrt(3), 1./sqrt(3) },
|
|
{ 1./sqrt(2), 0, -1./sqrt(2) },
|
|
{ 1./sqrt(6), -2./sqrt(6), 1./sqrt(6) },
|
|
};
|
|
uint8_t rgba_map[4];
|
|
|
|
ff_fill_rgba_map(rgba_map, inlink->format);
|
|
for (y = 0; y < 3; y++)
|
|
for (x = 0; x < 3; x++)
|
|
s->color_dct[y][x] = dct_3x3[rgba_map[y]][rgba_map[x]];
|
|
|
|
s->pr_width = inlink->w - (inlink->w - BSIZE) % s->step;
|
|
s->pr_height = inlink->h - (inlink->h - BSIZE) % s->step;
|
|
if (s->pr_width != inlink->w)
|
|
av_log(ctx, AV_LOG_WARNING, "The last %d horizontal pixels won't be denoised\n",
|
|
inlink->w - s->pr_width);
|
|
if (s->pr_height != inlink->h)
|
|
av_log(ctx, AV_LOG_WARNING, "The last %d vertical pixels won't be denoised\n",
|
|
inlink->h - s->pr_height);
|
|
|
|
s->p_linesize = linesize = FFALIGN(s->pr_width, 32);
|
|
for (i = 0; i < 2; i++) {
|
|
s->cbuf[i][0] = av_malloc(linesize * s->pr_height * sizeof(*s->cbuf[i][0]));
|
|
s->cbuf[i][1] = av_malloc(linesize * s->pr_height * sizeof(*s->cbuf[i][1]));
|
|
s->cbuf[i][2] = av_malloc(linesize * s->pr_height * sizeof(*s->cbuf[i][2]));
|
|
if (!s->cbuf[i][0] || !s->cbuf[i][1] || !s->cbuf[i][2])
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
s->weights = av_malloc(s->pr_height * linesize * sizeof(*s->weights));
|
|
if (!s->weights)
|
|
return AVERROR(ENOMEM);
|
|
iweights = av_calloc(s->pr_height, linesize * sizeof(*iweights));
|
|
if (!iweights)
|
|
return AVERROR(ENOMEM);
|
|
for (y = 0; y < s->pr_height - BSIZE + 1; y += s->step)
|
|
for (x = 0; x < s->pr_width - BSIZE + 1; x += s->step)
|
|
for (by = 0; by < BSIZE; by++)
|
|
for (bx = 0; bx < BSIZE; bx++)
|
|
iweights[(y + by)*linesize + x + bx]++;
|
|
for (y = 0; y < s->pr_height; y++)
|
|
for (x = 0; x < s->pr_width; x++)
|
|
s->weights[y*linesize + x] = 1. / iweights[y*linesize + x];
|
|
av_free(iweights);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static av_cold int init(AVFilterContext *ctx)
|
|
{
|
|
DCTdnoizContext *s = ctx->priv;
|
|
|
|
if (s->expr_str) {
|
|
int ret = av_expr_parse(&s->expr, s->expr_str, var_names,
|
|
NULL, NULL, NULL, NULL, 0, ctx);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
s->th = s->sigma * 3.;
|
|
s->step = BSIZE - s->overlap;
|
|
s->dct = av_dct_init(NBITS, DCT_II);
|
|
s->idct = av_dct_init(NBITS, DCT_III);
|
|
s->block = av_malloc(BSIZE * BSIZE * sizeof(*s->block));
|
|
s->tmp_block = av_malloc(BSIZE * BSIZE * sizeof(*s->tmp_block));
|
|
|
|
if (!s->dct || !s->idct || !s->tmp_block || !s->block)
|
|
return AVERROR(ENOMEM);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int query_formats(AVFilterContext *ctx)
|
|
{
|
|
static const enum AVPixelFormat pix_fmts[] = {
|
|
AV_PIX_FMT_BGR24, AV_PIX_FMT_RGB24,
|
|
AV_PIX_FMT_NONE
|
|
};
|
|
ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
|
|
return 0;
|
|
}
|
|
|
|
static void color_decorrelation(float dct3ch[3][3], float **dst, int dst_linesize,
|
|
const uint8_t *src, int src_linesize, int w, int h)
|
|
{
|
|
int x, y;
|
|
float *dstp_r = dst[0];
|
|
float *dstp_g = dst[1];
|
|
float *dstp_b = dst[2];
|
|
|
|
for (y = 0; y < h; y++) {
|
|
const uint8_t *srcp = src;
|
|
|
|
for (x = 0; x < w; x++) {
|
|
dstp_r[x] = srcp[0] * dct3ch[0][0] + srcp[1] * dct3ch[0][1] + srcp[2] * dct3ch[0][2];
|
|
dstp_g[x] = srcp[0] * dct3ch[1][0] + srcp[1] * dct3ch[1][1] + srcp[2] * dct3ch[1][2];
|
|
dstp_b[x] = srcp[0] * dct3ch[2][0] + srcp[1] * dct3ch[2][1] + srcp[2] * dct3ch[2][2];
|
|
srcp += 3;
|
|
}
|
|
src += src_linesize;
|
|
dstp_r += dst_linesize;
|
|
dstp_g += dst_linesize;
|
|
dstp_b += dst_linesize;
|
|
}
|
|
}
|
|
|
|
static void color_correlation(float dct3ch[3][3], uint8_t *dst, int dst_linesize,
|
|
float **src, int src_linesize, int w, int h)
|
|
{
|
|
int x, y;
|
|
const float *src_r = src[0];
|
|
const float *src_g = src[1];
|
|
const float *src_b = src[2];
|
|
|
|
for (y = 0; y < h; y++) {
|
|
uint8_t *dstp = dst;
|
|
|
|
for (x = 0; x < w; x++) {
|
|
dstp[0] = av_clip_uint8(src_r[x] * dct3ch[0][0] + src_g[x] * dct3ch[1][0] + src_b[x] * dct3ch[2][0]);
|
|
dstp[1] = av_clip_uint8(src_r[x] * dct3ch[0][1] + src_g[x] * dct3ch[1][1] + src_b[x] * dct3ch[2][1]);
|
|
dstp[2] = av_clip_uint8(src_r[x] * dct3ch[0][2] + src_g[x] * dct3ch[1][2] + src_b[x] * dct3ch[2][2]);
|
|
dstp += 3;
|
|
}
|
|
dst += dst_linesize;
|
|
src_r += src_linesize;
|
|
src_g += src_linesize;
|
|
src_b += src_linesize;
|
|
}
|
|
}
|
|
|
|
static void filter_plane(AVFilterContext *ctx,
|
|
float *dst, int dst_linesize,
|
|
const float *src, int src_linesize,
|
|
int w, int h)
|
|
{
|
|
int x, y, bx, by;
|
|
DCTdnoizContext *s = ctx->priv;
|
|
float *dst0 = dst;
|
|
const float *weights = s->weights;
|
|
|
|
// reset block sums
|
|
memset(dst, 0, h * dst_linesize * sizeof(*dst));
|
|
|
|
// block dct sums
|
|
for (y = 0; y < h - BSIZE + 1; y += s->step) {
|
|
for (x = 0; x < w - BSIZE + 1; x += s->step) {
|
|
float *ftb = dct_block(s, src + x, src_linesize);
|
|
|
|
if (s->expr) {
|
|
for (by = 0; by < BSIZE; by++) {
|
|
for (bx = 0; bx < BSIZE; bx++) {
|
|
s->var_values[VAR_C] = FFABS(*ftb);
|
|
*ftb++ *= av_expr_eval(s->expr, s->var_values, s);
|
|
}
|
|
}
|
|
} else {
|
|
for (by = 0; by < BSIZE; by++) {
|
|
for (bx = 0; bx < BSIZE; bx++) {
|
|
if (FFABS(*ftb) < s->th)
|
|
*ftb = 0;
|
|
ftb++;
|
|
}
|
|
}
|
|
}
|
|
idct_block(s, dst + x, dst_linesize);
|
|
}
|
|
src += s->step * src_linesize;
|
|
dst += s->step * dst_linesize;
|
|
}
|
|
|
|
// average blocks
|
|
dst = dst0;
|
|
for (y = 0; y < h; y++) {
|
|
for (x = 0; x < w; x++)
|
|
dst[x] *= weights[x];
|
|
dst += dst_linesize;
|
|
weights += dst_linesize;
|
|
}
|
|
}
|
|
|
|
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
|
|
{
|
|
AVFilterContext *ctx = inlink->dst;
|
|
DCTdnoizContext *s = ctx->priv;
|
|
AVFilterLink *outlink = inlink->dst->outputs[0];
|
|
int direct, plane;
|
|
AVFrame *out;
|
|
|
|
if (av_frame_is_writable(in)) {
|
|
direct = 1;
|
|
out = in;
|
|
} else {
|
|
direct = 0;
|
|
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);
|
|
}
|
|
|
|
color_decorrelation(s->color_dct, s->cbuf[0], s->p_linesize,
|
|
in->data[0], in->linesize[0], s->pr_width, s->pr_height);
|
|
for (plane = 0; plane < 3; plane++)
|
|
filter_plane(ctx, s->cbuf[1][plane], s->p_linesize,
|
|
s->cbuf[0][plane], s->p_linesize,
|
|
s->pr_width, s->pr_height);
|
|
color_correlation(s->color_dct, out->data[0], out->linesize[0],
|
|
s->cbuf[1], s->p_linesize, s->pr_width, s->pr_height);
|
|
|
|
if (!direct) {
|
|
int y;
|
|
uint8_t *dst = out->data[0];
|
|
const uint8_t *src = in->data[0];
|
|
const int dst_linesize = out->linesize[0];
|
|
const int src_linesize = in->linesize[0];
|
|
const int hpad = (inlink->w - s->pr_width) * 3;
|
|
const int vpad = (inlink->h - s->pr_height);
|
|
|
|
if (hpad) {
|
|
uint8_t *dstp = dst + s->pr_width * 3;
|
|
const uint8_t *srcp = src + s->pr_width * 3;
|
|
|
|
for (y = 0; y < s->pr_height; y++) {
|
|
memcpy(dstp, srcp, hpad);
|
|
dstp += dst_linesize;
|
|
srcp += src_linesize;
|
|
}
|
|
}
|
|
if (vpad) {
|
|
uint8_t *dstp = dst + s->pr_height * dst_linesize;
|
|
const uint8_t *srcp = src + s->pr_height * src_linesize;
|
|
|
|
for (y = 0; y < vpad; y++) {
|
|
memcpy(dstp, srcp, inlink->w * 3);
|
|
dstp += dst_linesize;
|
|
srcp += src_linesize;
|
|
}
|
|
}
|
|
|
|
av_frame_free(&in);
|
|
}
|
|
|
|
return ff_filter_frame(outlink, out);
|
|
}
|
|
|
|
static av_cold void uninit(AVFilterContext *ctx)
|
|
{
|
|
int i;
|
|
DCTdnoizContext *s = ctx->priv;
|
|
|
|
av_dct_end(s->dct);
|
|
av_dct_end(s->idct);
|
|
av_free(s->block);
|
|
av_free(s->tmp_block);
|
|
av_free(s->weights);
|
|
for (i = 0; i < 2; i++) {
|
|
av_free(s->cbuf[i][0]);
|
|
av_free(s->cbuf[i][1]);
|
|
av_free(s->cbuf[i][2]);
|
|
}
|
|
av_expr_free(s->expr);
|
|
}
|
|
|
|
static const AVFilterPad dctdnoiz_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.filter_frame = filter_frame,
|
|
.config_props = config_input,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVFilterPad dctdnoiz_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
AVFilter avfilter_vf_dctdnoiz = {
|
|
.name = "dctdnoiz",
|
|
.description = NULL_IF_CONFIG_SMALL("Denoise frames using 2D DCT."),
|
|
.priv_size = sizeof(DCTdnoizContext),
|
|
.init = init,
|
|
.uninit = uninit,
|
|
.query_formats = query_formats,
|
|
.inputs = dctdnoiz_inputs,
|
|
.outputs = dctdnoiz_outputs,
|
|
.priv_class = &dctdnoiz_class,
|
|
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
|
|
};
|