330 lines
10 KiB
C
330 lines
10 KiB
C
/*
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* Copyright (c) 2003 Daniel Moreno <comac AT comac DOT darktech DOT org>
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* Copyright (c) 2010 Baptiste Coudurier
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* Copyright (c) 2012 Loren Merritt
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*
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* This file is part of Libav, ported from MPlayer.
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*
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* Libav is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with Libav; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/**
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* @file
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* high quality 3d video denoiser, ported from MPlayer
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* libmpcodecs/vf_hqdn3d.c.
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*/
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#include "libavutil/pixdesc.h"
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#include "libavutil/intreadwrite.h"
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#include "avfilter.h"
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#include "formats.h"
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#include "internal.h"
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#include "video.h"
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typedef struct {
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int16_t coefs[4][512*16];
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uint16_t *line;
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uint16_t *frame_prev[3];
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int hsub, vsub;
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int depth;
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} HQDN3DContext;
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#define RIGHTSHIFT(a,b) (((a)+(((1<<(b))-1)>>1))>>(b))
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#define LOAD(x) ((depth==8 ? src[x] : AV_RN16A(src+(x)*2)) << (16-depth))
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#define STORE(x,val) (depth==8 ? dst[x] = RIGHTSHIFT(val, 16-depth)\
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: AV_WN16A(dst+(x)*2, RIGHTSHIFT(val, 16-depth)))
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static inline uint32_t lowpass(int prev, int cur, int16_t *coef)
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{
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int d = (prev-cur)>>4;
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return cur + coef[d];
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}
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av_always_inline
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static void denoise_temporal(uint8_t *src, uint8_t *dst,
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uint16_t *frame_ant,
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int w, int h, int sstride, int dstride,
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int16_t *temporal, int depth)
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{
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long x, y;
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uint32_t tmp;
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temporal += 0x1000;
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for (y = 0; y < h; y++) {
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for (x = 0; x < w; x++) {
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frame_ant[x] = tmp = lowpass(frame_ant[x], LOAD(x), temporal);
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STORE(x, tmp);
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}
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src += sstride;
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dst += dstride;
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frame_ant += w;
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}
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}
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av_always_inline
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static void denoise_spatial(uint8_t *src, uint8_t *dst,
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uint16_t *line_ant, uint16_t *frame_ant,
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int w, int h, int sstride, int dstride,
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int16_t *spatial, int16_t *temporal, int depth)
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{
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long x, y;
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uint32_t pixel_ant;
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uint32_t tmp;
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spatial += 0x1000;
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temporal += 0x1000;
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/* First line has no top neighbor. Only left one for each tmp and
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* last frame */
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pixel_ant = LOAD(0);
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for (x = 0; x < w; x++) {
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line_ant[x] = tmp = pixel_ant = lowpass(pixel_ant, LOAD(x), spatial);
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frame_ant[x] = tmp = lowpass(frame_ant[x], tmp, temporal);
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STORE(x, tmp);
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}
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for (y = 1; y < h; y++) {
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src += sstride;
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dst += dstride;
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frame_ant += w;
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pixel_ant = LOAD(0);
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for (x = 0; x < w-1; x++) {
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line_ant[x] = tmp = lowpass(line_ant[x], pixel_ant, spatial);
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pixel_ant = lowpass(pixel_ant, LOAD(x+1), spatial);
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frame_ant[x] = tmp = lowpass(frame_ant[x], tmp, temporal);
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STORE(x, tmp);
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}
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line_ant[x] = tmp = lowpass(line_ant[x], pixel_ant, spatial);
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frame_ant[x] = tmp = lowpass(frame_ant[x], tmp, temporal);
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STORE(x, tmp);
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}
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}
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av_always_inline
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static void denoise_depth(uint8_t *src, uint8_t *dst,
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uint16_t *line_ant, uint16_t **frame_ant_ptr,
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int w, int h, int sstride, int dstride,
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int16_t *spatial, int16_t *temporal, int depth)
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{
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long x, y;
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uint16_t *frame_ant = *frame_ant_ptr;
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if (!frame_ant) {
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uint8_t *frame_src = src;
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*frame_ant_ptr = frame_ant = av_malloc(w*h*sizeof(uint16_t));
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for (y = 0; y < h; y++, src += sstride, frame_ant += w)
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for (x = 0; x < w; x++)
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frame_ant[x] = LOAD(x);
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src = frame_src;
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frame_ant = *frame_ant_ptr;
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}
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if (spatial[0])
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denoise_spatial(src, dst, line_ant, frame_ant,
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w, h, sstride, dstride, spatial, temporal, depth);
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else
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denoise_temporal(src, dst, frame_ant,
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w, h, sstride, dstride, temporal, depth);
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}
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#define denoise(...) \
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switch (hqdn3d->depth) {\
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case 8: denoise_depth(__VA_ARGS__, 8); break;\
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case 9: denoise_depth(__VA_ARGS__, 9); break;\
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case 10: denoise_depth(__VA_ARGS__, 10); break;\
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}
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static void precalc_coefs(int16_t *ct, double dist25)
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{
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int i;
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double gamma, simil, C;
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gamma = log(0.25) / log(1.0 - FFMIN(dist25,252.0)/255.0 - 0.00001);
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for (i = -255*16; i <= 255*16; i++) {
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// lowpass() truncates (not rounds) the diff, so +15/32 for the midpoint of the bin.
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double f = (i + 15.0/32.0) / 16.0;
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simil = 1.0 - FFABS(f) / 255.0;
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C = pow(simil, gamma) * 256.0 * f;
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ct[16*256+i] = lrint(C);
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}
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ct[0] = !!dist25;
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}
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#define PARAM1_DEFAULT 4.0
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#define PARAM2_DEFAULT 3.0
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#define PARAM3_DEFAULT 6.0
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static int init(AVFilterContext *ctx, const char *args)
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{
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HQDN3DContext *hqdn3d = ctx->priv;
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double lum_spac, lum_tmp, chrom_spac, chrom_tmp;
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double param1, param2, param3, param4;
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lum_spac = PARAM1_DEFAULT;
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chrom_spac = PARAM2_DEFAULT;
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lum_tmp = PARAM3_DEFAULT;
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chrom_tmp = lum_tmp * chrom_spac / lum_spac;
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if (args) {
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switch (sscanf(args, "%lf:%lf:%lf:%lf",
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¶m1, ¶m2, ¶m3, ¶m4)) {
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case 1:
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lum_spac = param1;
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chrom_spac = PARAM2_DEFAULT * param1 / PARAM1_DEFAULT;
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lum_tmp = PARAM3_DEFAULT * param1 / PARAM1_DEFAULT;
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chrom_tmp = lum_tmp * chrom_spac / lum_spac;
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break;
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case 2:
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lum_spac = param1;
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chrom_spac = param2;
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lum_tmp = PARAM3_DEFAULT * param1 / PARAM1_DEFAULT;
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chrom_tmp = lum_tmp * chrom_spac / lum_spac;
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break;
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case 3:
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lum_spac = param1;
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chrom_spac = param2;
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lum_tmp = param3;
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chrom_tmp = lum_tmp * chrom_spac / lum_spac;
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break;
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case 4:
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lum_spac = param1;
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chrom_spac = param2;
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lum_tmp = param3;
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chrom_tmp = param4;
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break;
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}
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}
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av_log(ctx, AV_LOG_VERBOSE, "ls:%lf cs:%lf lt:%lf ct:%lf\n",
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lum_spac, chrom_spac, lum_tmp, chrom_tmp);
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if (lum_spac < 0 || chrom_spac < 0 || isnan(chrom_tmp)) {
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av_log(ctx, AV_LOG_ERROR,
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"Invalid negative value for luma or chroma spatial strength, "
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"or resulting value for chroma temporal strength is nan.\n");
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return AVERROR(EINVAL);
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}
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precalc_coefs(hqdn3d->coefs[0], lum_spac);
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precalc_coefs(hqdn3d->coefs[1], lum_tmp);
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precalc_coefs(hqdn3d->coefs[2], chrom_spac);
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precalc_coefs(hqdn3d->coefs[3], chrom_tmp);
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return 0;
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}
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static void uninit(AVFilterContext *ctx)
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{
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HQDN3DContext *hqdn3d = ctx->priv;
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av_freep(&hqdn3d->line);
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av_freep(&hqdn3d->frame_prev[0]);
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av_freep(&hqdn3d->frame_prev[1]);
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av_freep(&hqdn3d->frame_prev[2]);
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}
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static int query_formats(AVFilterContext *ctx)
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{
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static const enum PixelFormat pix_fmts[] = {
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PIX_FMT_YUV420P,
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PIX_FMT_YUV422P,
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PIX_FMT_YUV444P,
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PIX_FMT_YUV410P,
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PIX_FMT_YUV411P,
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PIX_FMT_YUV440P,
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PIX_FMT_YUVJ420P,
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PIX_FMT_YUVJ422P,
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PIX_FMT_YUVJ444P,
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PIX_FMT_YUVJ440P,
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AV_NE( PIX_FMT_YUV420P9BE, PIX_FMT_YUV420P9LE ),
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AV_NE( PIX_FMT_YUV422P9BE, PIX_FMT_YUV422P9LE ),
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AV_NE( PIX_FMT_YUV444P9BE, PIX_FMT_YUV444P9LE ),
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AV_NE( PIX_FMT_YUV420P10BE, PIX_FMT_YUV420P10LE ),
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AV_NE( PIX_FMT_YUV422P10BE, PIX_FMT_YUV422P10LE ),
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AV_NE( PIX_FMT_YUV444P10BE, PIX_FMT_YUV444P10LE ),
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PIX_FMT_NONE
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};
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ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
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return 0;
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}
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static int config_input(AVFilterLink *inlink)
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{
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HQDN3DContext *hqdn3d = inlink->dst->priv;
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hqdn3d->hsub = av_pix_fmt_descriptors[inlink->format].log2_chroma_w;
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hqdn3d->vsub = av_pix_fmt_descriptors[inlink->format].log2_chroma_h;
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hqdn3d->depth = av_pix_fmt_descriptors[inlink->format].comp[0].depth_minus1+1;
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hqdn3d->line = av_malloc(inlink->w * sizeof(*hqdn3d->line));
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if (!hqdn3d->line)
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return AVERROR(ENOMEM);
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return 0;
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}
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static int null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
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{
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return 0;
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}
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static int end_frame(AVFilterLink *inlink)
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{
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HQDN3DContext *hqdn3d = inlink->dst->priv;
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AVFilterLink *outlink = inlink->dst->outputs[0];
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AVFilterBufferRef *inpic = inlink ->cur_buf;
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AVFilterBufferRef *outpic = outlink->out_buf;
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int ret, c;
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for (c = 0; c < 3; c++) {
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denoise(inpic->data[c], outpic->data[c],
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hqdn3d->line, &hqdn3d->frame_prev[c],
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inpic->video->w >> (!!c * hqdn3d->hsub),
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inpic->video->h >> (!!c * hqdn3d->vsub),
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inpic->linesize[c], outpic->linesize[c],
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hqdn3d->coefs[c?2:0], hqdn3d->coefs[c?3:1]);
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}
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if ((ret = ff_draw_slice(outlink, 0, inpic->video->h, 1)) < 0 ||
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(ret = ff_end_frame(outlink)) < 0)
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return ret;
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return 0;
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}
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AVFilter avfilter_vf_hqdn3d = {
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.name = "hqdn3d",
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.description = NULL_IF_CONFIG_SMALL("Apply a High Quality 3D Denoiser."),
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.priv_size = sizeof(HQDN3DContext),
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.init = init,
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.uninit = uninit,
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.query_formats = query_formats,
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.inputs = (const AVFilterPad[]) {{ .name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.start_frame = ff_inplace_start_frame,
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.draw_slice = null_draw_slice,
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.config_props = config_input,
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.end_frame = end_frame },
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{ .name = NULL}},
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.outputs = (const AVFilterPad[]) {{ .name = "default",
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.type = AVMEDIA_TYPE_VIDEO },
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{ .name = NULL}},
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};
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