476 lines
15 KiB
C
476 lines
15 KiB
C
/*
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* Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
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* Copyright (c) 2013 Paul B Mahol
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* FFmpeg 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 FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 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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* noise generator
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*/
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#include "libavutil/opt.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/lfg.h"
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#include "libavutil/parseutils.h"
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#include "libavutil/pixdesc.h"
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#include "libavutil/x86/asm.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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#define MAX_NOISE 4096
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#define MAX_SHIFT 1024
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#define MAX_RES (MAX_NOISE-MAX_SHIFT)
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#define NOISE_UNIFORM 1
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#define NOISE_TEMPORAL 2
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#define NOISE_AVERAGED 8
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#define NOISE_PATTERN 16
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typedef struct {
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int strength;
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unsigned flags;
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int shiftptr;
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AVLFG lfg;
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int seed;
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int8_t *noise;
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int8_t *prev_shift[MAX_RES][3];
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} FilterParams;
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typedef struct {
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const AVClass *class;
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int nb_planes;
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int linesize[4];
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int height[4];
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FilterParams all;
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FilterParams param[4];
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int rand_shift[MAX_RES];
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int rand_shift_init;
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void (*line_noise)(uint8_t *dst, const uint8_t *src, int8_t *noise, int len, int shift);
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void (*line_noise_avg)(uint8_t *dst, const uint8_t *src, int len, int8_t **shift);
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} NoiseContext;
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#define OFFSET(x) offsetof(NoiseContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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#define NOISE_PARAMS(name, x, param) \
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{#name"_seed", "set component #"#x" noise seed", OFFSET(param.seed), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, FLAGS}, \
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{#name"_strength", "set component #"#x" strength", OFFSET(param.strength), AV_OPT_TYPE_INT, {.i64=0}, 0, 100, FLAGS}, \
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{#name"s", "set component #"#x" strength", OFFSET(param.strength), AV_OPT_TYPE_INT, {.i64=0}, 0, 100, FLAGS}, \
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{#name"_flags", "set component #"#x" flags", OFFSET(param.flags), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, 31, FLAGS, #name"_flags"}, \
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{#name"f", "set component #"#x" flags", OFFSET(param.flags), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, 31, FLAGS, #name"_flags"}, \
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{"a", "averaged noise", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_AVERAGED}, 0, 0, FLAGS, #name"_flags"}, \
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{"p", "(semi)regular pattern", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_PATTERN}, 0, 0, FLAGS, #name"_flags"}, \
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{"t", "temporal noise", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_TEMPORAL}, 0, 0, FLAGS, #name"_flags"}, \
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{"u", "uniform noise", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_UNIFORM}, 0, 0, FLAGS, #name"_flags"},
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static const AVOption noise_options[] = {
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NOISE_PARAMS(all, 0, all)
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NOISE_PARAMS(c0, 0, param[0])
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NOISE_PARAMS(c1, 1, param[1])
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NOISE_PARAMS(c2, 2, param[2])
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NOISE_PARAMS(c3, 3, param[3])
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{NULL}
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};
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AVFILTER_DEFINE_CLASS(noise);
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static const int8_t patt[4] = { -1, 0, 1, 0 };
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#define RAND_N(range) ((int) ((double) range * av_lfg_get(lfg) / (UINT_MAX + 1.0)))
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static int init_noise(NoiseContext *n, int comp)
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{
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int8_t *noise = av_malloc(MAX_NOISE * sizeof(int8_t));
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FilterParams *fp = &n->param[comp];
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AVLFG *lfg = &n->param[comp].lfg;
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int strength = fp->strength;
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int flags = fp->flags;
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int i, j;
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if (!noise)
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return AVERROR(ENOMEM);
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av_lfg_init(&fp->lfg, fp->seed);
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for (i = 0, j = 0; i < MAX_NOISE; i++, j++) {
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if (flags & NOISE_UNIFORM) {
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if (flags & NOISE_AVERAGED) {
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if (flags & NOISE_PATTERN) {
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noise[i] = (RAND_N(strength) - strength / 2) / 6
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+ patt[j % 4] * strength * 0.25 / 3;
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} else {
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noise[i] = (RAND_N(strength) - strength / 2) / 3;
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}
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} else {
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if (flags & NOISE_PATTERN) {
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noise[i] = (RAND_N(strength) - strength / 2) / 2
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+ patt[j % 4] * strength * 0.25;
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} else {
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noise[i] = RAND_N(strength) - strength / 2;
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}
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}
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} else {
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double x1, x2, w, y1;
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do {
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x1 = 2.0 * av_lfg_get(lfg) / (float)UINT_MAX - 1.0;
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x2 = 2.0 * av_lfg_get(lfg) / (float)UINT_MAX - 1.0;
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w = x1 * x1 + x2 * x2;
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} while (w >= 1.0);
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w = sqrt((-2.0 * log(w)) / w);
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y1 = x1 * w;
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y1 *= strength / sqrt(3.0);
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if (flags & NOISE_PATTERN) {
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y1 /= 2;
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y1 += patt[j % 4] * strength * 0.35;
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}
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y1 = av_clipf(y1, -128, 127);
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if (flags & NOISE_AVERAGED)
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y1 /= 3.0;
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noise[i] = (int)y1;
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}
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if (RAND_N(6) == 0)
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j--;
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}
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for (i = 0; i < MAX_RES; i++)
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for (j = 0; j < 3; j++)
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fp->prev_shift[i][j] = noise + (av_lfg_get(lfg) & (MAX_SHIFT - 1));
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if (!n->rand_shift_init) {
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for (i = 0; i < MAX_RES; i++)
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n->rand_shift[i] = av_lfg_get(lfg) & (MAX_SHIFT - 1);
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n->rand_shift_init = 1;
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}
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fp->noise = noise;
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fp->shiftptr = 0;
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return 0;
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}
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static int query_formats(AVFilterContext *ctx)
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{
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AVFilterFormats *formats = NULL;
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int fmt;
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for (fmt = 0; fmt < AV_PIX_FMT_NB; fmt++) {
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
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if (desc->flags & PIX_FMT_PLANAR && !((desc->comp[0].depth_minus1 + 1) & 7))
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ff_add_format(&formats, fmt);
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}
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ff_set_common_formats(ctx, formats);
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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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NoiseContext *n = inlink->dst->priv;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
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int i, ret;
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for (i = 0; i < desc->nb_components; i++)
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n->nb_planes = FFMAX(n->nb_planes, desc->comp[i].plane);
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n->nb_planes++;
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if ((ret = av_image_fill_linesizes(n->linesize, inlink->format, inlink->w)) < 0)
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return ret;
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n->height[1] = n->height[2] = inlink->h >> desc->log2_chroma_h;
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n->height[0] = n->height[3] = inlink->h;
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return 0;
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}
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static inline void line_noise_c(uint8_t *dst, const uint8_t *src, int8_t *noise,
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int len, int shift)
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{
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int i;
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noise += shift;
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for (i = 0; i < len; i++) {
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int v = src[i] + noise[i];
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dst[i] = av_clip_uint8(v);
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}
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}
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#define ASMALIGN(ZEROBITS) ".p2align " #ZEROBITS "\n\t"
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static void line_noise_mmx(uint8_t *dst, const uint8_t *src,
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int8_t *noise, int len, int shift)
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{
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#if HAVE_MMX_INLINE
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x86_reg mmx_len= len&(~7);
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noise+=shift;
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__asm__ volatile(
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"mov %3, %%"REG_a" \n\t"
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"pcmpeqb %%mm7, %%mm7 \n\t"
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"psllw $15, %%mm7 \n\t"
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"packsswb %%mm7, %%mm7 \n\t"
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ASMALIGN(4)
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"1: \n\t"
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"movq (%0, %%"REG_a"), %%mm0 \n\t"
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"movq (%1, %%"REG_a"), %%mm1 \n\t"
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"pxor %%mm7, %%mm0 \n\t"
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"paddsb %%mm1, %%mm0 \n\t"
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"pxor %%mm7, %%mm0 \n\t"
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"movq %%mm0, (%2, %%"REG_a") \n\t"
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"add $8, %%"REG_a" \n\t"
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" js 1b \n\t"
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:: "r" (src+mmx_len), "r" (noise+mmx_len), "r" (dst+mmx_len), "g" (-mmx_len)
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: "%"REG_a
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);
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if (mmx_len!=len)
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line_noise_c(dst+mmx_len, src+mmx_len, noise+mmx_len, len-mmx_len, 0);
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#endif
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}
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static void line_noise_mmxext(uint8_t *dst, const uint8_t *src,
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int8_t *noise, int len, int shift)
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{
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#if HAVE_MMXEXT_INLINE
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x86_reg mmx_len= len&(~7);
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noise+=shift;
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__asm__ volatile(
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"mov %3, %%"REG_a" \n\t"
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"pcmpeqb %%mm7, %%mm7 \n\t"
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"psllw $15, %%mm7 \n\t"
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"packsswb %%mm7, %%mm7 \n\t"
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ASMALIGN(4)
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"1: \n\t"
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"movq (%0, %%"REG_a"), %%mm0 \n\t"
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"movq (%1, %%"REG_a"), %%mm1 \n\t"
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"pxor %%mm7, %%mm0 \n\t"
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"paddsb %%mm1, %%mm0 \n\t"
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"pxor %%mm7, %%mm0 \n\t"
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"movntq %%mm0, (%2, %%"REG_a") \n\t"
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"add $8, %%"REG_a" \n\t"
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" js 1b \n\t"
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:: "r" (src+mmx_len), "r" (noise+mmx_len), "r" (dst+mmx_len), "g" (-mmx_len)
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: "%"REG_a
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);
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if (mmx_len != len)
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line_noise_c(dst+mmx_len, src+mmx_len, noise+mmx_len, len-mmx_len, 0);
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#endif
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}
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static inline void line_noise_avg_c(uint8_t *dst, const uint8_t *src,
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int len, int8_t **shift)
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{
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int i;
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int8_t *src2 = (int8_t*)src;
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for (i = 0; i < len; i++) {
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const int n = shift[0][i] + shift[1][i] + shift[2][i];
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dst[i] = src2[i] + ((n * src2[i]) >> 7);
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}
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}
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static inline void line_noise_avg_mmx(uint8_t *dst, const uint8_t *src,
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int len, int8_t **shift)
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{
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#if HAVE_MMX_INLINE
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x86_reg mmx_len= len&(~7);
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__asm__ volatile(
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"mov %5, %%"REG_a" \n\t"
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ASMALIGN(4)
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"1: \n\t"
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"movq (%1, %%"REG_a"), %%mm1 \n\t"
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"movq (%0, %%"REG_a"), %%mm0 \n\t"
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"paddb (%2, %%"REG_a"), %%mm1 \n\t"
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"paddb (%3, %%"REG_a"), %%mm1 \n\t"
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"movq %%mm0, %%mm2 \n\t"
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"movq %%mm1, %%mm3 \n\t"
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"punpcklbw %%mm0, %%mm0 \n\t"
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"punpckhbw %%mm2, %%mm2 \n\t"
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"punpcklbw %%mm1, %%mm1 \n\t"
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"punpckhbw %%mm3, %%mm3 \n\t"
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"pmulhw %%mm0, %%mm1 \n\t"
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"pmulhw %%mm2, %%mm3 \n\t"
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"paddw %%mm1, %%mm1 \n\t"
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"paddw %%mm3, %%mm3 \n\t"
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"paddw %%mm0, %%mm1 \n\t"
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"paddw %%mm2, %%mm3 \n\t"
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"psrlw $8, %%mm1 \n\t"
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"psrlw $8, %%mm3 \n\t"
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"packuswb %%mm3, %%mm1 \n\t"
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"movq %%mm1, (%4, %%"REG_a") \n\t"
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"add $8, %%"REG_a" \n\t"
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" js 1b \n\t"
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:: "r" (src+mmx_len), "r" (shift[0]+mmx_len), "r" (shift[1]+mmx_len), "r" (shift[2]+mmx_len),
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"r" (dst+mmx_len), "g" (-mmx_len)
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: "%"REG_a
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);
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if (mmx_len != len){
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int8_t *shift2[3]={shift[0]+mmx_len, shift[1]+mmx_len, shift[2]+mmx_len};
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line_noise_avg_c(dst+mmx_len, src+mmx_len, len-mmx_len, shift2);
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}
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#endif
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}
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static void noise(uint8_t *dst, const uint8_t *src,
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int dst_linesize, int src_linesize,
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int width, int height, NoiseContext *n, int comp)
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{
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int8_t *noise = n->param[comp].noise;
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int flags = n->param[comp].flags;
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AVLFG *lfg = &n->param[comp].lfg;
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int shift, y;
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if (!noise) {
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if (dst != src) {
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for (y = 0; y < height; y++) {
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memcpy(dst, src, width);
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dst += dst_linesize;
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src += src_linesize;
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}
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}
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return;
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}
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for (y = 0; y < height; y++) {
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if (flags & NOISE_TEMPORAL)
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shift = av_lfg_get(lfg) & (MAX_SHIFT - 1);
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else
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shift = n->rand_shift[y];
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if (flags & NOISE_AVERAGED) {
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n->line_noise_avg(dst, src, width, n->param[comp].prev_shift[y]);
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n->param[comp].prev_shift[y][n->param[comp].shiftptr] = noise + shift;
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} else {
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n->line_noise(dst, src, noise, width, shift);
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}
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dst += dst_linesize;
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src += src_linesize;
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}
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n->param[comp].shiftptr++;
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if (n->param[comp].shiftptr == 3)
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n->param[comp].shiftptr = 0;
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}
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static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
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{
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NoiseContext *n = inlink->dst->priv;
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AVFilterLink *outlink = inlink->dst->outputs[0];
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AVFrame *out;
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int i;
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if (av_frame_is_writable(inpicref)) {
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out = inpicref;
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} else {
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out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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if (!out) {
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av_frame_free(&inpicref);
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return AVERROR(ENOMEM);
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}
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av_frame_copy_props(out, inpicref);
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}
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for (i = 0; i < n->nb_planes; i++)
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noise(out->data[i], inpicref->data[i], out->linesize[i],
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inpicref->linesize[i], n->linesize[i], n->height[i], n, i);
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emms_c();
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if (inpicref != out)
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av_frame_free(&inpicref);
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return ff_filter_frame(outlink, out);
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}
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static av_cold int init(AVFilterContext *ctx)
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{
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NoiseContext *n = ctx->priv;
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int ret, i;
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int cpu_flags = av_get_cpu_flags();
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for (i = 0; i < 4; i++) {
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if (n->all.seed >= 0)
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n->param[i].seed = n->all.seed;
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else
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n->param[i].seed = 123457;
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if (n->all.strength)
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n->param[i].strength = n->all.strength;
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if (n->all.flags)
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n->param[i].flags = n->all.flags;
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}
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for (i = 0; i < 4; i++) {
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if (n->param[i].strength && ((ret = init_noise(n, i)) < 0))
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return ret;
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}
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if (HAVE_MMX_INLINE &&
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cpu_flags & AV_CPU_FLAG_MMX) {
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n->line_noise = line_noise_mmx;
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n->line_noise_avg = line_noise_avg_mmx;
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}
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if (HAVE_MMXEXT_INLINE &&
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cpu_flags & AV_CPU_FLAG_MMXEXT)
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n->line_noise = line_noise_mmxext;
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return 0;
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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NoiseContext *n = ctx->priv;
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int i;
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for (i = 0; i < 4; i++)
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av_freep(&n->param[i].noise);
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}
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static const AVFilterPad noise_inputs[] = {
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{
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.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.filter_frame = filter_frame,
|
|
.config_props = config_input,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVFilterPad noise_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
AVFilter avfilter_vf_noise = {
|
|
.name = "noise",
|
|
.description = NULL_IF_CONFIG_SMALL("Add noise."),
|
|
.priv_size = sizeof(NoiseContext),
|
|
.init = init,
|
|
.uninit = uninit,
|
|
.query_formats = query_formats,
|
|
.inputs = noise_inputs,
|
|
.outputs = noise_outputs,
|
|
.priv_class = &noise_class,
|
|
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE,
|
|
};
|