493 lines
16 KiB
C
493 lines
16 KiB
C
/*
|
|
* Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
|
|
* Copyright (c) 2013 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 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
|
|
* noise generator
|
|
*/
|
|
|
|
#include "libavutil/opt.h"
|
|
#include "libavutil/imgutils.h"
|
|
#include "libavutil/lfg.h"
|
|
#include "libavutil/parseutils.h"
|
|
#include "libavutil/pixdesc.h"
|
|
#include "libavutil/x86/asm.h"
|
|
#include "avfilter.h"
|
|
#include "formats.h"
|
|
#include "internal.h"
|
|
#include "video.h"
|
|
|
|
#define MAX_NOISE 5120
|
|
#define MAX_SHIFT 1024
|
|
#define MAX_RES (MAX_NOISE-MAX_SHIFT)
|
|
|
|
#define NOISE_UNIFORM 1
|
|
#define NOISE_TEMPORAL 2
|
|
#define NOISE_AVERAGED 8
|
|
#define NOISE_PATTERN 16
|
|
|
|
typedef struct {
|
|
int strength;
|
|
unsigned flags;
|
|
AVLFG lfg;
|
|
int seed;
|
|
int8_t *noise;
|
|
int8_t *prev_shift[MAX_RES][3];
|
|
} FilterParams;
|
|
|
|
typedef struct {
|
|
const AVClass *class;
|
|
int nb_planes;
|
|
int linesize[4];
|
|
int bytewidth[4];
|
|
int height[4];
|
|
FilterParams all;
|
|
FilterParams param[4];
|
|
int rand_shift[MAX_RES];
|
|
int rand_shift_init;
|
|
void (*line_noise)(uint8_t *dst, const uint8_t *src, int8_t *noise, int len, int shift);
|
|
void (*line_noise_avg)(uint8_t *dst, const uint8_t *src, int len, int8_t **shift);
|
|
} NoiseContext;
|
|
|
|
typedef struct ThreadData {
|
|
AVFrame *in, *out;
|
|
} ThreadData;
|
|
|
|
#define OFFSET(x) offsetof(NoiseContext, x)
|
|
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
|
|
|
|
#define NOISE_PARAMS(name, x, param) \
|
|
{#name"_seed", "set component #"#x" noise seed", OFFSET(param.seed), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, FLAGS}, \
|
|
{#name"_strength", "set component #"#x" strength", OFFSET(param.strength), AV_OPT_TYPE_INT, {.i64=0}, 0, 100, FLAGS}, \
|
|
{#name"s", "set component #"#x" strength", OFFSET(param.strength), AV_OPT_TYPE_INT, {.i64=0}, 0, 100, FLAGS}, \
|
|
{#name"_flags", "set component #"#x" flags", OFFSET(param.flags), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, 31, FLAGS, #name"_flags"}, \
|
|
{#name"f", "set component #"#x" flags", OFFSET(param.flags), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, 31, FLAGS, #name"_flags"}, \
|
|
{"a", "averaged noise", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_AVERAGED}, 0, 0, FLAGS, #name"_flags"}, \
|
|
{"p", "(semi)regular pattern", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_PATTERN}, 0, 0, FLAGS, #name"_flags"}, \
|
|
{"t", "temporal noise", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_TEMPORAL}, 0, 0, FLAGS, #name"_flags"}, \
|
|
{"u", "uniform noise", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_UNIFORM}, 0, 0, FLAGS, #name"_flags"},
|
|
|
|
static const AVOption noise_options[] = {
|
|
NOISE_PARAMS(all, 0, all)
|
|
NOISE_PARAMS(c0, 0, param[0])
|
|
NOISE_PARAMS(c1, 1, param[1])
|
|
NOISE_PARAMS(c2, 2, param[2])
|
|
NOISE_PARAMS(c3, 3, param[3])
|
|
{NULL}
|
|
};
|
|
|
|
AVFILTER_DEFINE_CLASS(noise);
|
|
|
|
static const int8_t patt[4] = { -1, 0, 1, 0 };
|
|
|
|
#define RAND_N(range) ((int) ((double) range * av_lfg_get(lfg) / (UINT_MAX + 1.0)))
|
|
static int init_noise(NoiseContext *n, int comp)
|
|
{
|
|
int8_t *noise = av_malloc(MAX_NOISE * sizeof(int8_t));
|
|
FilterParams *fp = &n->param[comp];
|
|
AVLFG *lfg = &n->param[comp].lfg;
|
|
int strength = fp->strength;
|
|
int flags = fp->flags;
|
|
int i, j;
|
|
|
|
if (!noise)
|
|
return AVERROR(ENOMEM);
|
|
|
|
av_lfg_init(&fp->lfg, fp->seed);
|
|
|
|
for (i = 0, j = 0; i < MAX_NOISE; i++, j++) {
|
|
if (flags & NOISE_UNIFORM) {
|
|
if (flags & NOISE_AVERAGED) {
|
|
if (flags & NOISE_PATTERN) {
|
|
noise[i] = (RAND_N(strength) - strength / 2) / 6
|
|
+ patt[j % 4] * strength * 0.25 / 3;
|
|
} else {
|
|
noise[i] = (RAND_N(strength) - strength / 2) / 3;
|
|
}
|
|
} else {
|
|
if (flags & NOISE_PATTERN) {
|
|
noise[i] = (RAND_N(strength) - strength / 2) / 2
|
|
+ patt[j % 4] * strength * 0.25;
|
|
} else {
|
|
noise[i] = RAND_N(strength) - strength / 2;
|
|
}
|
|
}
|
|
} else {
|
|
double x1, x2, w, y1;
|
|
do {
|
|
x1 = 2.0 * av_lfg_get(lfg) / (float)UINT_MAX - 1.0;
|
|
x2 = 2.0 * av_lfg_get(lfg) / (float)UINT_MAX - 1.0;
|
|
w = x1 * x1 + x2 * x2;
|
|
} while (w >= 1.0);
|
|
|
|
w = sqrt((-2.0 * log(w)) / w);
|
|
y1 = x1 * w;
|
|
y1 *= strength / sqrt(3.0);
|
|
if (flags & NOISE_PATTERN) {
|
|
y1 /= 2;
|
|
y1 += patt[j % 4] * strength * 0.35;
|
|
}
|
|
y1 = av_clipf(y1, -128, 127);
|
|
if (flags & NOISE_AVERAGED)
|
|
y1 /= 3.0;
|
|
noise[i] = (int)y1;
|
|
}
|
|
if (RAND_N(6) == 0)
|
|
j--;
|
|
}
|
|
|
|
for (i = 0; i < MAX_RES; i++)
|
|
for (j = 0; j < 3; j++)
|
|
fp->prev_shift[i][j] = noise + (av_lfg_get(lfg) & (MAX_SHIFT - 1));
|
|
|
|
if (!n->rand_shift_init) {
|
|
for (i = 0; i < MAX_RES; i++)
|
|
n->rand_shift[i] = av_lfg_get(lfg) & (MAX_SHIFT - 1);
|
|
n->rand_shift_init = 1;
|
|
}
|
|
|
|
fp->noise = noise;
|
|
return 0;
|
|
}
|
|
|
|
static int query_formats(AVFilterContext *ctx)
|
|
{
|
|
AVFilterFormats *formats = NULL;
|
|
int fmt;
|
|
|
|
for (fmt = 0; fmt < AV_PIX_FMT_NB; fmt++) {
|
|
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
|
|
if (desc->flags & AV_PIX_FMT_FLAG_PLANAR && !((desc->comp[0].depth_minus1 + 1) & 7))
|
|
ff_add_format(&formats, fmt);
|
|
}
|
|
|
|
ff_set_common_formats(ctx, formats);
|
|
return 0;
|
|
}
|
|
|
|
static int config_input(AVFilterLink *inlink)
|
|
{
|
|
NoiseContext *n = inlink->dst->priv;
|
|
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
|
|
int ret;
|
|
|
|
n->nb_planes = av_pix_fmt_count_planes(inlink->format);
|
|
|
|
if ((ret = av_image_fill_linesizes(n->linesize, inlink->format, inlink->w)) < 0)
|
|
return ret;
|
|
|
|
n->height[1] = n->height[2] = FF_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
|
|
n->height[0] = n->height[3] = inlink->h;
|
|
|
|
n->bytewidth [1] = n->bytewidth [2] = FF_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w) * ((desc->comp[0].depth_minus1 + 1) / 8);
|
|
n->bytewidth [0] = n->bytewidth [3] = inlink->w * ((desc->comp[0].depth_minus1 + 1) / 8);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline void line_noise_c(uint8_t *dst, const uint8_t *src, int8_t *noise,
|
|
int len, int shift)
|
|
{
|
|
int i;
|
|
|
|
noise += shift;
|
|
for (i = 0; i < len; i++) {
|
|
int v = src[i] + noise[i];
|
|
|
|
dst[i] = av_clip_uint8(v);
|
|
}
|
|
}
|
|
|
|
#define ASMALIGN(ZEROBITS) ".p2align " #ZEROBITS "\n\t"
|
|
|
|
static void line_noise_mmx(uint8_t *dst, const uint8_t *src,
|
|
int8_t *noise, int len, int shift)
|
|
{
|
|
#if HAVE_MMX_INLINE
|
|
x86_reg mmx_len= len&(~7);
|
|
noise+=shift;
|
|
|
|
__asm__ volatile(
|
|
"mov %3, %%"REG_a" \n\t"
|
|
"pcmpeqb %%mm7, %%mm7 \n\t"
|
|
"psllw $15, %%mm7 \n\t"
|
|
"packsswb %%mm7, %%mm7 \n\t"
|
|
ASMALIGN(4)
|
|
"1: \n\t"
|
|
"movq (%0, %%"REG_a"), %%mm0 \n\t"
|
|
"movq (%1, %%"REG_a"), %%mm1 \n\t"
|
|
"pxor %%mm7, %%mm0 \n\t"
|
|
"paddsb %%mm1, %%mm0 \n\t"
|
|
"pxor %%mm7, %%mm0 \n\t"
|
|
"movq %%mm0, (%2, %%"REG_a") \n\t"
|
|
"add $8, %%"REG_a" \n\t"
|
|
" js 1b \n\t"
|
|
:: "r" (src+mmx_len), "r" (noise+mmx_len), "r" (dst+mmx_len), "g" (-mmx_len)
|
|
: "%"REG_a
|
|
);
|
|
if (mmx_len!=len)
|
|
line_noise_c(dst+mmx_len, src+mmx_len, noise+mmx_len, len-mmx_len, 0);
|
|
#endif
|
|
}
|
|
|
|
static void line_noise_mmxext(uint8_t *dst, const uint8_t *src,
|
|
int8_t *noise, int len, int shift)
|
|
{
|
|
#if HAVE_MMXEXT_INLINE
|
|
x86_reg mmx_len= len&(~7);
|
|
noise+=shift;
|
|
|
|
__asm__ volatile(
|
|
"mov %3, %%"REG_a" \n\t"
|
|
"pcmpeqb %%mm7, %%mm7 \n\t"
|
|
"psllw $15, %%mm7 \n\t"
|
|
"packsswb %%mm7, %%mm7 \n\t"
|
|
ASMALIGN(4)
|
|
"1: \n\t"
|
|
"movq (%0, %%"REG_a"), %%mm0 \n\t"
|
|
"movq (%1, %%"REG_a"), %%mm1 \n\t"
|
|
"pxor %%mm7, %%mm0 \n\t"
|
|
"paddsb %%mm1, %%mm0 \n\t"
|
|
"pxor %%mm7, %%mm0 \n\t"
|
|
"movntq %%mm0, (%2, %%"REG_a") \n\t"
|
|
"add $8, %%"REG_a" \n\t"
|
|
" js 1b \n\t"
|
|
:: "r" (src+mmx_len), "r" (noise+mmx_len), "r" (dst+mmx_len), "g" (-mmx_len)
|
|
: "%"REG_a
|
|
);
|
|
if (mmx_len != len)
|
|
line_noise_c(dst+mmx_len, src+mmx_len, noise+mmx_len, len-mmx_len, 0);
|
|
#endif
|
|
}
|
|
|
|
static inline void line_noise_avg_c(uint8_t *dst, const uint8_t *src,
|
|
int len, int8_t **shift)
|
|
{
|
|
int i;
|
|
int8_t *src2 = (int8_t*)src;
|
|
|
|
for (i = 0; i < len; i++) {
|
|
const int n = shift[0][i] + shift[1][i] + shift[2][i];
|
|
dst[i] = src2[i] + ((n * src2[i]) >> 7);
|
|
}
|
|
}
|
|
|
|
static inline void line_noise_avg_mmx(uint8_t *dst, const uint8_t *src,
|
|
int len, int8_t **shift)
|
|
{
|
|
#if HAVE_MMX_INLINE
|
|
x86_reg mmx_len= len&(~7);
|
|
|
|
__asm__ volatile(
|
|
"mov %5, %%"REG_a" \n\t"
|
|
ASMALIGN(4)
|
|
"1: \n\t"
|
|
"movq (%1, %%"REG_a"), %%mm1 \n\t"
|
|
"movq (%0, %%"REG_a"), %%mm0 \n\t"
|
|
"paddb (%2, %%"REG_a"), %%mm1 \n\t"
|
|
"paddb (%3, %%"REG_a"), %%mm1 \n\t"
|
|
"movq %%mm0, %%mm2 \n\t"
|
|
"movq %%mm1, %%mm3 \n\t"
|
|
"punpcklbw %%mm0, %%mm0 \n\t"
|
|
"punpckhbw %%mm2, %%mm2 \n\t"
|
|
"punpcklbw %%mm1, %%mm1 \n\t"
|
|
"punpckhbw %%mm3, %%mm3 \n\t"
|
|
"pmulhw %%mm0, %%mm1 \n\t"
|
|
"pmulhw %%mm2, %%mm3 \n\t"
|
|
"paddw %%mm1, %%mm1 \n\t"
|
|
"paddw %%mm3, %%mm3 \n\t"
|
|
"paddw %%mm0, %%mm1 \n\t"
|
|
"paddw %%mm2, %%mm3 \n\t"
|
|
"psrlw $8, %%mm1 \n\t"
|
|
"psrlw $8, %%mm3 \n\t"
|
|
"packuswb %%mm3, %%mm1 \n\t"
|
|
"movq %%mm1, (%4, %%"REG_a") \n\t"
|
|
"add $8, %%"REG_a" \n\t"
|
|
" js 1b \n\t"
|
|
:: "r" (src+mmx_len), "r" (shift[0]+mmx_len), "r" (shift[1]+mmx_len), "r" (shift[2]+mmx_len),
|
|
"r" (dst+mmx_len), "g" (-mmx_len)
|
|
: "%"REG_a
|
|
);
|
|
|
|
if (mmx_len != len){
|
|
int8_t *shift2[3]={shift[0]+mmx_len, shift[1]+mmx_len, shift[2]+mmx_len};
|
|
line_noise_avg_c(dst+mmx_len, src+mmx_len, len-mmx_len, shift2);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static void noise(uint8_t *dst, const uint8_t *src,
|
|
int dst_linesize, int src_linesize,
|
|
int width, int start, int end, NoiseContext *n, int comp)
|
|
{
|
|
FilterParams *p = &n->param[comp];
|
|
int8_t *noise = p->noise;
|
|
const int flags = p->flags;
|
|
AVLFG *lfg = &p->lfg;
|
|
int shift, y;
|
|
|
|
if (!noise) {
|
|
if (dst != src)
|
|
av_image_copy_plane(dst, dst_linesize, src, src_linesize, width, end - start);
|
|
return;
|
|
}
|
|
|
|
for (y = start; y < end; y++) {
|
|
const int ix = y & (MAX_RES - 1);
|
|
if (flags & NOISE_TEMPORAL)
|
|
shift = av_lfg_get(lfg) & (MAX_SHIFT - 1);
|
|
else
|
|
shift = n->rand_shift[ix];
|
|
|
|
if (flags & NOISE_AVERAGED) {
|
|
n->line_noise_avg(dst, src, width, p->prev_shift[ix]);
|
|
p->prev_shift[ix][shift & 3] = noise + shift;
|
|
} else {
|
|
n->line_noise(dst, src, noise, width, shift);
|
|
}
|
|
dst += dst_linesize;
|
|
src += src_linesize;
|
|
}
|
|
}
|
|
|
|
static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
|
|
{
|
|
NoiseContext *s = ctx->priv;
|
|
ThreadData *td = arg;
|
|
int plane;
|
|
|
|
for (plane = 0; plane < s->nb_planes; plane++) {
|
|
const int height = s->height[plane];
|
|
const int start = (height * jobnr ) / nb_jobs;
|
|
const int end = (height * (jobnr+1)) / nb_jobs;
|
|
noise(td->out->data[plane] + start * td->out->linesize[plane],
|
|
td->in->data[plane] + start * td->in->linesize[plane],
|
|
td->out->linesize[plane], td->in->linesize[plane],
|
|
s->bytewidth[plane], start, end, s, plane);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
|
|
{
|
|
AVFilterContext *ctx = inlink->dst;
|
|
AVFilterLink *outlink = ctx->outputs[0];
|
|
NoiseContext *n = ctx->priv;
|
|
ThreadData td;
|
|
AVFrame *out;
|
|
|
|
if (av_frame_is_writable(inpicref)) {
|
|
out = inpicref;
|
|
} else {
|
|
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
|
|
if (!out) {
|
|
av_frame_free(&inpicref);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
av_frame_copy_props(out, inpicref);
|
|
}
|
|
|
|
td.in = inpicref; td.out = out;
|
|
ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(n->height[0], ctx->graph->nb_threads));
|
|
emms_c();
|
|
|
|
if (inpicref != out)
|
|
av_frame_free(&inpicref);
|
|
return ff_filter_frame(outlink, out);
|
|
}
|
|
|
|
static av_cold int init(AVFilterContext *ctx)
|
|
{
|
|
NoiseContext *n = ctx->priv;
|
|
int ret, i;
|
|
int cpu_flags = av_get_cpu_flags();
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
if (n->all.seed >= 0)
|
|
n->param[i].seed = n->all.seed;
|
|
else
|
|
n->param[i].seed = 123457;
|
|
if (n->all.strength)
|
|
n->param[i].strength = n->all.strength;
|
|
if (n->all.flags)
|
|
n->param[i].flags = n->all.flags;
|
|
}
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
if (n->param[i].strength && ((ret = init_noise(n, i)) < 0))
|
|
return ret;
|
|
}
|
|
|
|
n->line_noise = line_noise_c;
|
|
n->line_noise_avg = line_noise_avg_c;
|
|
|
|
if (HAVE_MMX_INLINE &&
|
|
cpu_flags & AV_CPU_FLAG_MMX) {
|
|
n->line_noise = line_noise_mmx;
|
|
n->line_noise_avg = line_noise_avg_mmx;
|
|
}
|
|
if (HAVE_MMXEXT_INLINE &&
|
|
cpu_flags & AV_CPU_FLAG_MMXEXT)
|
|
n->line_noise = line_noise_mmxext;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static av_cold void uninit(AVFilterContext *ctx)
|
|
{
|
|
NoiseContext *n = ctx->priv;
|
|
int i;
|
|
|
|
for (i = 0; i < 4; i++)
|
|
av_freep(&n->param[i].noise);
|
|
}
|
|
|
|
static const AVFilterPad noise_inputs[] = {
|
|
{
|
|
.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_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
|
|
};
|