0,0 → 1,488 |
/* |
* 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 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 |
* 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 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; |
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typedef struct ThreadData { |
AVFrame *in, *out; |
} ThreadData; |
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#define OFFSET(x) offsetof(NoiseContext, x) |
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
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#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} |
}; |
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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))) |
static av_cold 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); |
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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++) { |
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--; |
} |
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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; |
} |
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fp->noise = noise; |
return 0; |
} |
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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); |
} |
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ff_set_common_formats(ctx, formats); |
return 0; |
} |
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static int config_input(AVFilterLink *inlink) |
{ |
NoiseContext *n = inlink->dst->priv; |
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); |
int ret; |
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n->nb_planes = av_pix_fmt_count_planes(inlink->format); |
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if ((ret = av_image_fill_linesizes(n->bytewidth, inlink->format, inlink->w)) < 0) |
return ret; |
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n->height[1] = n->height[2] = FF_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h); |
n->height[0] = n->height[3] = inlink->h; |
|
return 0; |
} |
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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]; |
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dst[i] = av_clip_uint8(v); |
} |
} |
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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, |
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 |
} |
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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; |
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__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 |
} |
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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); |
} |
} |
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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 |
} |
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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); |
} |
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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, |
}; |