/*
* Copyright (c) 2015 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
*/
/**
* @file
* Adaptive Temporal Averaging Denoiser,
* based on paper "Video Denoising Based on Adaptive Temporal Averaging" by
* David Bartovčak and Miroslav Vrankić
*/
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#define FF_BUFQUEUE_SIZE 129
#include "bufferqueue.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
#define SIZE FF_BUFQUEUE_SIZE
typedef struct ATADenoiseContext {
const AVClass *class;
float fthra[4], fthrb[4];
int thra[4], thrb[4];
int nb_planes;
int planewidth[4];
int planeheight[4];
struct FFBufQueue q;
void *data[4][SIZE];
int linesize[4][SIZE];
int size, mid;
int available;
int (*filter_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
} ATADenoiseContext;
#define OFFSET(x) offsetof(ATADenoiseContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
static const AVOption atadenoise_options[] = {
{ "0a", "set threshold A for 1st plane", OFFSET(fthra[0]), AV_OPT_TYPE_FLOAT, {.dbl=0.02}, 0, 0.3, FLAGS },
{ "0b", "set threshold B for 1st plane", OFFSET(fthrb[0]), AV_OPT_TYPE_FLOAT, {.dbl=0.04}, 0, 5.0, FLAGS },
{ "1a", "set threshold A for 2nd plane", OFFSET(fthra[1]), AV_OPT_TYPE_FLOAT, {.dbl=0.02}, 0, 0.3, FLAGS },
{ "1b", "set threshold B for 2nd plane", OFFSET(fthrb[1]), AV_OPT_TYPE_FLOAT, {.dbl=0.04}, 0, 5.0, FLAGS },
{ "2a", "set threshold A for 3rd plane", OFFSET(fthra[2]), AV_OPT_TYPE_FLOAT, {.dbl=0.02}, 0, 0.3, FLAGS },
{ "2b", "set threshold B for 3rd plane", OFFSET(fthrb[2]), AV_OPT_TYPE_FLOAT, {.dbl=0.04}, 0, 5.0, FLAGS },
{ "s", "set how many frames to use", OFFSET(size), AV_OPT_TYPE_INT, {.i64=33}, 5, SIZE, FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(atadenoise);
static int query_formats(AVFilterContext *ctx)
{
static const enum AVPixelFormat pixel_fmts[] = {
AV_PIX_FMT_GRAY8,
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_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_NONE
};
AVFilterFormats *formats = ff_make_format_list(pixel_fmts);
if (!formats)
return AVERROR(ENOMEM);
return ff_set_common_formats(ctx, formats);
}
static av_cold int init(AVFilterContext *ctx)
{
ATADenoiseContext *s = ctx->priv;
if (!(s->size & 1)) {
av_log(ctx, AV_LOG_ERROR, "size %d is invalid. Must be an odd value.\n", s->size);
return AVERROR(EINVAL);
}
s->mid = s->size / 2 + 1;
return 0;
}
typedef struct ThreadData {
AVFrame *in, *out;
} ThreadData;
static int filter_slice8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
ATADenoiseContext *s = ctx->priv;
ThreadData *td = arg;
AVFrame *in = td->in;
AVFrame *out = td->out;
const int size = s->size;
const int mid = s->mid;
int p, x, y, i, j;
for (p = 0; p < s->nb_planes; p++) {
const int h = s->planeheight[p];
const int w = s->planewidth[p];
const int slice_start = (h * jobnr) / nb_jobs;
const int slice_end = (h * (jobnr+1)) / nb_jobs;
const uint8_t *src = in->data[p] + slice_start * in->linesize[p];
uint8_t *dst = out->data[p] + slice_start * out->linesize[p];
const int thra = s->thra[p];
const int thrb = s->thrb[p];
const uint8_t **data = (const uint8_t **)s->data[p];
const int *linesize = (const int *)s->linesize[p];
const uint8_t *srcf[SIZE];
for (i = 0; i < size; i++)
srcf[i] = data[i] + slice_start * linesize[i];
for (y = slice_start; y < slice_end; y++) {
for (x = 0; x < w; x++) {
const int srcx = src[x];
unsigned lsumdiff = 0, rsumdiff = 0;
unsigned ldiff, rdiff;
unsigned sum = srcx;
int l = 0, r = 0;
int srcjx, srcix;
for (j = mid - 1, i = mid + 1; j >= 0 && i < size; j--, i++) {
srcjx = srcf[j][x];
ldiff = FFABS(srcx - srcjx);
lsumdiff += ldiff;
if (ldiff > thra ||
lsumdiff > thrb)
break;
l++;
sum += srcjx;
srcix = srcf[i][x];
rdiff = FFABS(srcx - srcix);
rsumdiff += rdiff;
if (rdiff > thra ||
rsumdiff > thrb)
break;
r++;
sum += srcix;
}
dst[x] = sum / (r + l + 1);
}
dst += out->linesize[p];
src += in->linesize[p];
for (i = 0; i < size; i++)
srcf[i] += linesize[i];
}
}
return 0;
}
static int filter_slice16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
ATADenoiseContext *s = ctx->priv;
ThreadData *td = arg;
AVFrame *in = td->in;
AVFrame *out = td->out;
const int size = s->size;
const int mid = s->mid;
int p, x, y, i, j;
for (p = 0; p < s->nb_planes; p++) {
const int h = s->planeheight[p];
const int w = s->planewidth[p];
const int slice_start = (h * jobnr) / nb_jobs;
const int slice_end = (h * (jobnr+1)) / nb_jobs;
const uint16_t *src = (uint16_t *)(in->data[p] + slice_start * in->linesize[p]);
uint16_t *dst = (uint16_t *)(out->data[p] + slice_start * out->linesize[p]);
const int thra = s->thra[p];
const int thrb = s->thrb[p];
const uint8_t **data = (const uint8_t **)s->data[p];
const int *linesize = (const int *)s->linesize[p];
const uint16_t *srcf[SIZE];
for (i = 0; i < s->size; i++)
srcf[i] = (const uint16_t *)(data[i] + slice_start * linesize[i]);
for (y = slice_start; y < slice_end; y++) {
for (x = 0; x < w; x++) {
const int srcx = src[x];
unsigned lsumdiff = 0, rsumdiff = 0;
unsigned ldiff, rdiff;
unsigned sum = srcx;
int l = 0, r = 0;
int srcjx, srcix;
for (j = mid - 1, i = mid + 1; j >= 0 && i < size; j--, i++) {
srcjx = srcf[j][x];
ldiff = FFABS(srcx - srcjx);
lsumdiff += ldiff;
if (ldiff > thra ||
lsumdiff > thrb)
break;
l++;
sum += srcjx;
srcix = srcf[i][x];
rdiff = FFABS(srcx - srcix);
rsumdiff += rdiff;
if (rdiff > thra ||
rsumdiff > thrb)
break;
r++;
sum += srcix;
}
dst[x] = sum / (r + l + 1);
}
dst += out->linesize[p] / 2;
src += in->linesize[p] / 2;
for (i = 0; i < size; i++)
srcf[i] += linesize[i] / 2;
}
}
return 0;
}
static int config_input(AVFilterLink *inlink)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
AVFilterContext *ctx = inlink->dst;
ATADenoiseContext *s = ctx->priv;
int depth;
s->nb_planes = desc->nb_components;
s->planeheight[1] = s->planeheight[2] = FF_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
s->planeheight[0] = s->planeheight[3] = inlink->h;
s->planewidth[1] = s->planewidth[2] = FF_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
s->planewidth[0] = s->planewidth[3] = inlink->w;
depth = desc->comp[0].depth_minus1 + 1;
if (depth == 8)
s->filter_slice = filter_slice8;
else
s->filter_slice = filter_slice16;
s->thra[0] = s->fthra[0] * (1 << depth) - 1;
s->thra[1] = s->fthra[1] * (1 << depth) - 1;
s->thra[2] = s->fthra[2] * (1 << depth) - 1;
s->thrb[0] = s->fthrb[0] * (1 << depth) - 1;
s->thrb[1] = s->fthrb[1] * (1 << depth) - 1;
s->thrb[2] = s->fthrb[2] * (1 << depth) - 1;
return 0;
}
static int config_output(AVFilterLink *outlink)
{
outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
{
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = ctx->outputs[0];
ATADenoiseContext *s = ctx->priv;
AVFrame *out, *in;
int i;
if (s->q.available != s->size) {
if (s->q.available < s->mid) {
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out)
return AVERROR(ENOMEM);
for (i = 0; i < s->mid; i++)
ff_bufqueue_add(ctx, &s->q, av_frame_clone(out));
av_frame_free(&out);
}
if (s->q.available < s->size) {
ff_bufqueue_add(ctx, &s->q, buf);
s->available++;
}
return 0;
}
in = ff_bufqueue_peek(&s->q, s->mid);
if (!ctx->is_disabled) {
ThreadData td;
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out) {
av_frame_free(&buf);
return AVERROR(ENOMEM);
}
for (i = 0; i < s->size; i++) {
AVFrame *frame = ff_bufqueue_peek(&s->q, i);
s->data[0][i] = frame->data[0];
s->data[1][i] = frame->data[1];
s->data[2][i] = frame->data[2];
s->linesize[0][i] = frame->linesize[0];
s->linesize[1][i] = frame->linesize[1];
s->linesize[2][i] = frame->linesize[2];
}
td.in = in; td.out = out;
ctx->internal->execute(ctx, s->filter_slice, &td, NULL,
FFMIN3(s->planeheight[1],
s->planeheight[2],
ctx->graph->nb_threads));
av_frame_copy_props(out, in);
} else {
out = av_frame_clone(in);
if (!out) {
av_frame_free(&buf);
return AVERROR(ENOMEM);
}
}
in = ff_bufqueue_get(&s->q);
av_frame_free(&in);
ff_bufqueue_add(ctx, &s->q, buf);
return ff_filter_frame(outlink, out);
}
static int request_frame(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
ATADenoiseContext *s = ctx->priv;
int ret = 0;
ret = ff_request_frame(ctx->inputs[0]);
if (ret == AVERROR_EOF && !ctx->is_disabled && s->available) {
AVFrame *buf = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!buf)
return AVERROR(ENOMEM);
ret = filter_frame(ctx->inputs[0], buf);
s->available--;
}
return ret;
}
static av_cold void uninit(AVFilterContext *ctx)
{
ATADenoiseContext *s = ctx->priv;
ff_bufqueue_discard_all(&s->q);
}
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,
.request_frame = request_frame,
.config_props = config_output,
},
{ NULL }
};
AVFilter ff_vf_atadenoise = {
.name = "atadenoise",
.description = NULL_IF_CONFIG_SMALL("Apply an Adaptive Temporal Averaging Denoiser."),
.priv_size = sizeof(ATADenoiseContext),
.priv_class = &atadenoise_class,
.init = init,
.uninit = uninit,
.query_formats = query_formats,
.inputs = inputs,
.outputs = outputs,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
};