/*
* Copyright (c) 2003 Daniel Moreno <comac AT comac DOT darktech DOT org>
* Copyright (c) 2010 Baptiste Coudurier
* Copyright (c) 2012 Loren Merritt
*
* This file is part of FFmpeg, ported from MPlayer.
*
* 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.
*/
/**
* @file
* high quality 3d video denoiser, ported from MPlayer
* libmpcodecs/vf_hqdn3d.c.
*/
#include "libavutil/common.h"
#include "libavutil/pixdesc.h"
#include "libavutil/intreadwrite.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
typedef struct {
int16_t *coefs[4];
uint16_t *line;
uint16_t *frame_prev[3];
double strength[4];
int hsub, vsub;
int depth;
void (*denoise_row[17])(uint8_t *src, uint8_t *dst, uint16_t *line_ant, uint16_t *frame_ant, ptrdiff_t w, int16_t *spatial, int16_t *temporal);
} HQDN3DContext;
void ff_hqdn3d_row_8_x86(uint8_t *src, uint8_t *dst, uint16_t *line_ant, uint16_t *frame_ant, ptrdiff_t w, int16_t *spatial, int16_t *temporal);
void ff_hqdn3d_row_9_x86(uint8_t *src, uint8_t *dst, uint16_t *line_ant, uint16_t *frame_ant, ptrdiff_t w, int16_t *spatial, int16_t *temporal);
void ff_hqdn3d_row_10_x86(uint8_t *src, uint8_t *dst, uint16_t *line_ant, uint16_t *frame_ant, ptrdiff_t w, int16_t *spatial, int16_t *temporal);
void ff_hqdn3d_row_16_x86(uint8_t *src, uint8_t *dst, uint16_t *line_ant, uint16_t *frame_ant, ptrdiff_t w, int16_t *spatial, int16_t *temporal);
#define LUT_BITS (depth==16 ? 8 : 4)
#define LOAD(x) (((depth == 8 ? src[x] : AV_RN16A(src + (x) * 2)) << (16 - depth))\
+ (((1 << (16 - depth)) - 1) >> 1))
#define STORE(x,val) (depth == 8 ? dst[x] = (val) >> (16 - depth) : \
AV_WN16A(dst + (x) * 2, (val) >> (16 - depth)))
av_always_inline
static uint32_t lowpass(int prev, int cur, int16_t *coef, int depth)
{
int d = (prev - cur) >> (8 - LUT_BITS);
return cur + coef[d];
}
av_always_inline
static void denoise_temporal(uint8_t *src, uint8_t *dst,
uint16_t *frame_ant,
int w, int h, int sstride, int dstride,
int16_t *temporal, int depth)
{
long x, y;
uint32_t tmp;
temporal += 256 << LUT_BITS;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
frame_ant[x] = tmp = lowpass(frame_ant[x], LOAD(x), temporal, depth);
STORE(x, tmp);
}
src += sstride;
dst += dstride;
frame_ant += w;
}
}
av_always_inline
static void denoise_spatial(HQDN3DContext *hqdn3d,
uint8_t *src, uint8_t *dst,
uint16_t *line_ant, uint16_t *frame_ant,
int w, int h, int sstride, int dstride,
int16_t *spatial, int16_t *temporal, int depth)
{
long x, y;
uint32_t pixel_ant;
uint32_t tmp;
spatial += 256 << LUT_BITS;
temporal += 256 << LUT_BITS;
/* First line has no top neighbor. Only left one for each tmp and
* last frame */
pixel_ant = LOAD(0);
for (x = 0; x < w; x++) {
line_ant[x] = tmp = pixel_ant = lowpass(pixel_ant, LOAD(x), spatial, depth);
frame_ant[x] = tmp = lowpass(frame_ant[x], tmp, temporal, depth);
STORE(x, tmp);
}
for (y = 1; y < h; y++) {
src += sstride;
dst += dstride;
frame_ant += w;
if (hqdn3d->denoise_row[depth]) {
hqdn3d->denoise_row[depth](src, dst, line_ant, frame_ant, w, spatial, temporal);
continue;
}
pixel_ant = LOAD(0);
for (x = 0; x < w-1; x++) {
line_ant[x] = tmp = lowpass(line_ant[x], pixel_ant, spatial, depth);
pixel_ant = lowpass(pixel_ant, LOAD(x+1), spatial, depth);
frame_ant[x] = tmp = lowpass(frame_ant[x], tmp, temporal, depth);
STORE(x, tmp);
}
line_ant[x] = tmp = lowpass(line_ant[x], pixel_ant, spatial, depth);
frame_ant[x] = tmp = lowpass(frame_ant[x], tmp, temporal, depth);
STORE(x, tmp);
}
}
av_always_inline
static void denoise_depth(HQDN3DContext *hqdn3d,
uint8_t *src, uint8_t *dst,
uint16_t *line_ant, uint16_t **frame_ant_ptr,
int w, int h, int sstride, int dstride,
int16_t *spatial, int16_t *temporal, int depth)
{
// FIXME: For 16bit depth, frame_ant could be a pointer to the previous
// filtered frame rather than a separate buffer.
long x, y;
uint16_t *frame_ant = *frame_ant_ptr;
if (!frame_ant) {
uint8_t *frame_src = src;
*frame_ant_ptr = frame_ant = av_malloc(w*h*sizeof(uint16_t));
for (y = 0; y < h; y++, src += sstride, frame_ant += w)
for (x = 0; x < w; x++)
frame_ant[x] = LOAD(x);
src = frame_src;
frame_ant = *frame_ant_ptr;
}
if (spatial[0])
denoise_spatial(hqdn3d, src, dst, line_ant, frame_ant,
w, h, sstride, dstride, spatial, temporal, depth);
else
denoise_temporal(src, dst, frame_ant,
w, h, sstride, dstride, temporal, depth);
emms_c();
}
#define denoise(...) \
switch (hqdn3d->depth) {\
case 8: denoise_depth(__VA_ARGS__, 8); break;\
case 9: denoise_depth(__VA_ARGS__, 9); break;\
case 10: denoise_depth(__VA_ARGS__, 10); break;\
case 16: denoise_depth(__VA_ARGS__, 16); break;\
}
static int16_t *precalc_coefs(double dist25, int depth)
{
int i;
double gamma, simil, C;
int16_t *ct = av_malloc((512<<LUT_BITS)*sizeof(int16_t));
if (!ct)
return NULL;
gamma = log(0.25) / log(1.0 - FFMIN(dist25,252.0)/255.0 - 0.00001);
for (i = -255<<LUT_BITS; i <= 255<<LUT_BITS; i++) {
double f = ((i<<(9-LUT_BITS)) + (1<<(8-LUT_BITS)) - 1) / 512.0; // midpoint of the bin
simil = 1.0 - FFABS(f) / 255.0;
C = pow(simil, gamma) * 256.0 * f;
ct[(256<<LUT_BITS)+i] = lrint(C);
}
ct[0] = !!dist25;
return ct;
}
#define PARAM1_DEFAULT 4.0
#define PARAM2_DEFAULT 3.0
#define PARAM3_DEFAULT 6.0
static int init(AVFilterContext *ctx, const char *args)
{
HQDN3DContext *hqdn3d = ctx->priv;
double lum_spac, lum_tmp, chrom_spac, chrom_tmp;
double param1, param2, param3, param4;
lum_spac = PARAM1_DEFAULT;
chrom_spac = PARAM2_DEFAULT;
lum_tmp = PARAM3_DEFAULT;
chrom_tmp = lum_tmp * chrom_spac / lum_spac;
if (args) {
switch (sscanf(args, "%lf:%lf:%lf:%lf",
¶m1, ¶m2, ¶m3, ¶m4)) {
case 1:
lum_spac = param1;
chrom_spac = PARAM2_DEFAULT * param1 / PARAM1_DEFAULT;
lum_tmp = PARAM3_DEFAULT * param1 / PARAM1_DEFAULT;
chrom_tmp = lum_tmp * chrom_spac / lum_spac;
break;
case 2:
lum_spac = param1;
chrom_spac = param2;
lum_tmp = PARAM3_DEFAULT * param1 / PARAM1_DEFAULT;
chrom_tmp = lum_tmp * chrom_spac / lum_spac;
break;
case 3:
lum_spac = param1;
chrom_spac = param2;
lum_tmp = param3;
chrom_tmp = lum_tmp * chrom_spac / lum_spac;
break;
case 4:
lum_spac = param1;
chrom_spac = param2;
lum_tmp = param3;
chrom_tmp = param4;
break;
}
}
hqdn3d->strength[0] = lum_spac;
hqdn3d->strength[1] = lum_tmp;
hqdn3d->strength[2] = chrom_spac;
hqdn3d->strength[3] = chrom_tmp;
av_log(ctx, AV_LOG_VERBOSE, "ls:%f cs:%f lt:%f ct:%f\n",
lum_spac, chrom_spac, lum_tmp, chrom_tmp);
if (lum_spac < 0 || chrom_spac < 0 || isnan(chrom_tmp)) {
av_log(ctx, AV_LOG_ERROR,
"Invalid negative value for luma or chroma spatial strength, "
"or resulting value for chroma temporal strength is nan.\n");
return AVERROR(EINVAL);
}
return 0;
}
static void uninit(AVFilterContext *ctx)
{
HQDN3DContext *hqdn3d = ctx->priv;
av_freep(&hqdn3d->coefs[0]);
av_freep(&hqdn3d->coefs[1]);
av_freep(&hqdn3d->coefs[2]);
av_freep(&hqdn3d->coefs[3]);
av_freep(&hqdn3d->line);
av_freep(&hqdn3d->frame_prev[0]);
av_freep(&hqdn3d->frame_prev[1]);
av_freep(&hqdn3d->frame_prev[2]);
}
static int query_formats(AVFilterContext *ctx)
{
static const enum AVPixelFormat pix_fmts[] = {
AV_PIX_FMT_YUV420P,
AV_PIX_FMT_YUV422P,
AV_PIX_FMT_YUV444P,
AV_PIX_FMT_YUV410P,
AV_PIX_FMT_YUV411P,
AV_PIX_FMT_YUV440P,
AV_PIX_FMT_YUVJ420P,
AV_PIX_FMT_YUVJ422P,
AV_PIX_FMT_YUVJ444P,
AV_PIX_FMT_YUVJ440P,
AV_NE( AV_PIX_FMT_YUV420P9BE, AV_PIX_FMT_YUV420P9LE ),
AV_NE( AV_PIX_FMT_YUV422P9BE, AV_PIX_FMT_YUV422P9LE ),
AV_NE( AV_PIX_FMT_YUV444P9BE, AV_PIX_FMT_YUV444P9LE ),
AV_NE( AV_PIX_FMT_YUV420P10BE, AV_PIX_FMT_YUV420P10LE ),
AV_NE( AV_PIX_FMT_YUV422P10BE, AV_PIX_FMT_YUV422P10LE ),
AV_NE( AV_PIX_FMT_YUV444P10BE, AV_PIX_FMT_YUV444P10LE ),
AV_NE( AV_PIX_FMT_YUV420P16BE, AV_PIX_FMT_YUV420P16LE ),
AV_NE( AV_PIX_FMT_YUV422P16BE, AV_PIX_FMT_YUV422P16LE ),
AV_NE( AV_PIX_FMT_YUV444P16BE, AV_PIX_FMT_YUV444P16LE ),
AV_PIX_FMT_NONE
};
ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
return 0;
}
static int config_input(AVFilterLink *inlink)
{
HQDN3DContext *hqdn3d = inlink->dst->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
int i;
hqdn3d->hsub = desc->log2_chroma_w;
hqdn3d->vsub = desc->log2_chroma_h;
hqdn3d->depth = desc->comp[0].depth_minus1+1;
hqdn3d->line = av_malloc(inlink->w * sizeof(*hqdn3d->line));
if (!hqdn3d->line)
return AVERROR(ENOMEM);
for (i = 0; i < 4; i++) {
hqdn3d->coefs[i] = precalc_coefs(hqdn3d->strength[i], hqdn3d->depth);
if (!hqdn3d->coefs[i])
return AVERROR(ENOMEM);
}
#if HAVE_YASM
hqdn3d->denoise_row[ 8] = ff_hqdn3d_row_8_x86;
hqdn3d->denoise_row[ 9] = ff_hqdn3d_row_9_x86;
hqdn3d->denoise_row[10] = ff_hqdn3d_row_10_x86;
hqdn3d->denoise_row[16] = ff_hqdn3d_row_16_x86;
#endif
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *in)
{
HQDN3DContext *hqdn3d = inlink->dst->priv;
AVFilterLink *outlink = inlink->dst->outputs[0];
AVFilterBufferRef *out;
int direct, c;
if (in->perms & AV_PERM_WRITE) {
direct = 1;
out = in;
} else {
direct = 0;
out = ff_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
if (!out) {
avfilter_unref_bufferp(&in);
return AVERROR(ENOMEM);
}
avfilter_copy_buffer_ref_props(out, in);
}
for (c = 0; c < 3; c++) {
denoise(hqdn3d, in->data[c], out->data[c],
hqdn3d->line, &hqdn3d->frame_prev[c],
in->video->w >> (!!c * hqdn3d->hsub),
in->video->h >> (!!c * hqdn3d->vsub),
in->linesize[c], out->linesize[c],
hqdn3d->coefs[c?2:0], hqdn3d->coefs[c?3:1]);
}
if (!direct)
avfilter_unref_bufferp(&in);
return ff_filter_frame(outlink, out);
}
static const AVFilterPad avfilter_vf_hqdn3d_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_input,
.filter_frame = filter_frame,
},
{ NULL }
};
static const AVFilterPad avfilter_vf_hqdn3d_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO
},
{ NULL }
};
AVFilter avfilter_vf_hqdn3d = {
.name = "hqdn3d",
.description = NULL_IF_CONFIG_SMALL("Apply a High Quality 3D Denoiser."),
.priv_size = sizeof(HQDN3DContext),
.init = init,
.uninit = uninit,
.query_formats = query_formats,
.inputs = avfilter_vf_hqdn3d_inputs,
.outputs = avfilter_vf_hqdn3d_outputs,
};