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ffmpeg/libavfilter/libmpcodecs/vf_noise.c

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/*
* Copyright (C) 2002 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of MPlayer.
*
* MPlayer 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.
*
* MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <math.h>
#include "config.h"
#include "mp_msg.h"
#include "cpudetect.h"
#if HAVE_MALLOC_H
#include <malloc.h>
#endif
#include "img_format.h"
#include "mp_image.h"
#include "vf.h"
#include "libvo/fastmemcpy.h"
#include "libavutil/mem.h"
#include "libavutil/x86/asm.h"
#define MAX_NOISE 4096
#define MAX_SHIFT 1024
#define MAX_RES (MAX_NOISE-MAX_SHIFT)
//===========================================================================//
static inline void lineNoise_C(uint8_t *dst, uint8_t *src, int8_t *noise, int len, int shift);
static inline void lineNoiseAvg_C(uint8_t *dst, uint8_t *src, int len, int8_t **shift);
static void (*lineNoise)(uint8_t *dst, uint8_t *src, int8_t *noise, int len, int shift)= lineNoise_C;
static void (*lineNoiseAvg)(uint8_t *dst, uint8_t *src, int len, int8_t **shift)= lineNoiseAvg_C;
typedef struct FilterParam{
int strength;
int uniform;
int temporal;
int quality;
int averaged;
int pattern;
int shiftptr;
int8_t *noise;
int8_t *prev_shift[MAX_RES][3];
}FilterParam;
struct vf_priv_s {
FilterParam lumaParam;
FilterParam chromaParam;
unsigned int outfmt;
};
static int nonTempRandShift_init;
static int nonTempRandShift[MAX_RES];
static int patt[4] = {
-1,0,1,0
};
#define RAND_N(range) ((int) ((double)range*rand()/(RAND_MAX+1.0)))
static int8_t *initNoise(FilterParam *fp){
int strength= fp->strength;
int uniform= fp->uniform;
int averaged= fp->averaged;
int pattern= fp->pattern;
int8_t *noise= av_malloc(MAX_NOISE*sizeof(int8_t));
int i, j;
srand(123457);
for(i=0,j=0; i<MAX_NOISE; i++,j++)
{
if(uniform) {
if (averaged) {
if (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 (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 * rand()/(float)RAND_MAX - 1.0;
x2 = 2.0 * rand()/(float)RAND_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 (pattern) {
y1 /= 2;
y1 += patt[j%4]*strength*0.35;
}
if (y1<-128) y1=-128;
else if(y1> 127) y1= 127;
if (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 + (rand()&(MAX_SHIFT-1));
if(!nonTempRandShift_init){
for(i=0; i<MAX_RES; i++){
nonTempRandShift[i]= rand()&(MAX_SHIFT-1);
}
nonTempRandShift_init = 1;
}
fp->noise= noise;
fp->shiftptr= 0;
return noise;
}
/***************************************************************************/
#if HAVE_MMX
static inline void lineNoise_MMX(uint8_t *dst, uint8_t *src, int8_t *noise, int len, int shift){
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)
lineNoise_C(dst+mmx_len, src+mmx_len, noise+mmx_len, len-mmx_len, 0);
}
#endif
//duplicate of previous except movntq
#if HAVE_MMX2
static inline void lineNoise_MMX2(uint8_t *dst, uint8_t *src, int8_t *noise, int len, int shift){
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)
lineNoise_C(dst+mmx_len, src+mmx_len, noise+mmx_len, len-mmx_len, 0);
}
#endif
static inline void lineNoise_C(uint8_t *dst, 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];
if(v>255) dst[i]=255; //FIXME optimize
else if(v<0) dst[i]=0;
else dst[i]=v;
}
}
/***************************************************************************/
#if HAVE_MMX
static inline void lineNoiseAvg_MMX(uint8_t *dst, uint8_t *src, int len, int8_t **shift){
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};
lineNoiseAvg_C(dst+mmx_len, src+mmx_len, len-mmx_len, shift2);
}
}
#endif
static inline void lineNoiseAvg_C(uint8_t *dst, 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 void noise(uint8_t *dst, uint8_t *src, int dstStride, int srcStride, int width, int height, FilterParam *fp){
int8_t *noise= fp->noise;
int y;
int shift=0;
if(!noise)
{
if(src==dst) return;
if(dstStride==srcStride) fast_memcpy(dst, src, srcStride*height);
else
{
for(y=0; y<height; y++)
{
fast_memcpy(dst, src, width);
dst+= dstStride;
src+= srcStride;
}
}
return;
}
for(y=0; y<height; y++)
{
if(fp->temporal) shift= rand()&(MAX_SHIFT -1);
else shift= nonTempRandShift[y];
if(fp->quality==0) shift&= ~7;
if (fp->averaged) {
lineNoiseAvg(dst, src, width, fp->prev_shift[y]);
fp->prev_shift[y][fp->shiftptr] = noise + shift;
} else {
lineNoise(dst, src, noise, width, shift);
}
dst+= dstStride;
src+= srcStride;
}
fp->shiftptr++;
if (fp->shiftptr == 3) fp->shiftptr = 0;
}
static int config(struct vf_instance *vf,
int width, int height, int d_width, int d_height,
unsigned int flags, unsigned int outfmt){
return ff_vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
}
static void get_image(struct vf_instance *vf, mp_image_t *mpi){
if(mpi->flags&MP_IMGFLAG_PRESERVE) return; // don't change
if(mpi->imgfmt!=vf->priv->outfmt) return; // colorspace differ
// ok, we can do pp in-place (or pp disabled):
vf->dmpi=ff_vf_get_image(vf->next,mpi->imgfmt,
mpi->type, mpi->flags, mpi->w, mpi->h);
mpi->planes[0]=vf->dmpi->planes[0];
mpi->stride[0]=vf->dmpi->stride[0];
mpi->width=vf->dmpi->width;
if(mpi->flags&MP_IMGFLAG_PLANAR){
mpi->planes[1]=vf->dmpi->planes[1];
mpi->planes[2]=vf->dmpi->planes[2];
mpi->stride[1]=vf->dmpi->stride[1];
mpi->stride[2]=vf->dmpi->stride[2];
}
mpi->flags|=MP_IMGFLAG_DIRECT;
}
static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts){
mp_image_t *dmpi;
if(!(mpi->flags&MP_IMGFLAG_DIRECT)){
// no DR, so get a new image! hope we'll get DR buffer:
vf->dmpi=ff_vf_get_image(vf->next,vf->priv->outfmt,
MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE,
mpi->w,mpi->h);
//printf("nodr\n");
}
//else printf("dr\n");
dmpi= vf->dmpi;
noise(dmpi->planes[0], mpi->planes[0], dmpi->stride[0], mpi->stride[0], mpi->w, mpi->h, &vf->priv->lumaParam);
noise(dmpi->planes[1], mpi->planes[1], dmpi->stride[1], mpi->stride[1], mpi->w/2, mpi->h/2, &vf->priv->chromaParam);
noise(dmpi->planes[2], mpi->planes[2], dmpi->stride[2], mpi->stride[2], mpi->w/2, mpi->h/2, &vf->priv->chromaParam);
ff_vf_clone_mpi_attributes(dmpi, mpi);
#if HAVE_MMX
if(ff_gCpuCaps.hasMMX) __asm__ volatile ("emms\n\t");
#endif
#if HAVE_MMX2
if(ff_gCpuCaps.hasMMX2) __asm__ volatile ("sfence\n\t");
#endif
return ff_vf_next_put_image(vf,dmpi, pts);
}
static void uninit(struct vf_instance *vf){
if(!vf->priv) return;
av_free(vf->priv->chromaParam.noise);
vf->priv->chromaParam.noise= NULL;
av_free(vf->priv->lumaParam.noise);
vf->priv->lumaParam.noise= NULL;
free(vf->priv);
vf->priv=NULL;
}
//===========================================================================//
static int query_format(struct vf_instance *vf, unsigned int fmt){
switch(fmt)
{
case IMGFMT_YV12:
case IMGFMT_I420:
case IMGFMT_IYUV:
return ff_vf_next_query_format(vf,vf->priv->outfmt);
}
return 0;
}
static void parse(FilterParam *fp, char* args){
char *pos;
char *max= strchr(args, ':');
if(!max) max= args + strlen(args);
fp->strength= atoi(args);
pos= strchr(args, 'u');
if(pos && pos<max) fp->uniform=1;
pos= strchr(args, 't');
if(pos && pos<max) fp->temporal=1;
pos= strchr(args, 'h');
if(pos && pos<max) fp->quality=1;
pos= strchr(args, 'p');
if(pos && pos<max) fp->pattern=1;
pos= strchr(args, 'a');
if(pos && pos<max) {
fp->temporal=1;
fp->averaged=1;
}
if(fp->strength) initNoise(fp);
}
static const unsigned int fmt_list[]={
IMGFMT_YV12,
IMGFMT_I420,
IMGFMT_IYUV,
0
};
static int vf_open(vf_instance_t *vf, char *args){
vf->config=config;
vf->put_image=put_image;
vf->get_image=get_image;
vf->query_format=query_format;
vf->uninit=uninit;
vf->priv=malloc(sizeof(struct vf_priv_s));
memset(vf->priv, 0, sizeof(struct vf_priv_s));
if(args)
{
char *arg2= strchr(args,':');
if(arg2) parse(&vf->priv->chromaParam, arg2+1);
parse(&vf->priv->lumaParam, args);
}
// check csp:
vf->priv->outfmt=ff_vf_match_csp(&vf->next,fmt_list,IMGFMT_YV12);
if(!vf->priv->outfmt)
{
uninit(vf);
return 0; // no csp match :(
}
#if HAVE_MMX
if(ff_gCpuCaps.hasMMX){
lineNoise= lineNoise_MMX;
lineNoiseAvg= lineNoiseAvg_MMX;
}
#endif
#if HAVE_MMX2
if(ff_gCpuCaps.hasMMX2) lineNoise= lineNoise_MMX2;
// if(ff_gCpuCaps.hasMMX) lineNoiseAvg= lineNoiseAvg_MMX2;
#endif
return 1;
}
const vf_info_t ff_vf_info_noise = {
"noise generator",
"noise",
"Michael Niedermayer",
"",
vf_open,
NULL
};
//===========================================================================//
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