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mpv/libmpcodecs/vf_yadif.c

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/*
Copyright (C) 2006 Michael Niedermayer <michaelni@gmx.at>
This program 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.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, 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"
#ifdef HAVE_MALLOC_H
#include <malloc.h>
#endif
#include "img_format.h"
#include "mp_image.h"
#include "vf.h"
#include "libvo/fastmemcpy.h"
#define MIN(a,b) ((a) > (b) ? (b) : (a))
#define MAX(a,b) ((a) < (b) ? (b) : (a))
#define ABS(a) ((a) > 0 ? (a) : (-(a)))
#define MIN3(a,b,c) MIN(MIN(a,b),c)
#define MAX3(a,b,c) MAX(MAX(a,b),c)
//===========================================================================//
struct vf_priv_s {
int mode;
int parity;
int stride[3];
uint8_t *ref[4][3];
};
static void store_ref(struct vf_priv_s *p, uint8_t *src[3], int src_stride[3], int width, int height){
int i;
memcpy (p->ref[3], p->ref[0], sizeof(uint8_t *)*3);
memmove(p->ref[0], p->ref[1], sizeof(uint8_t *)*3*3);
for(i=0; i<3; i++){
int is_chroma= !!i;
memcpy_pic(p->ref[2][i], src[i], width>>is_chroma, height>>is_chroma, p->stride[i], src_stride[i]);
}
}
static void filter(struct vf_priv_s *p, uint8_t *dst[3], int dst_stride[3], int width, int height, int parity, int tff){
int x, y, i, j;
for(i=0; i<3; i++){
int is_chroma= !!i;
int w= width >>is_chroma;
int h= height>>is_chroma;
int refs= p->stride[i];
for(y=0; y<h; y++){
if((y ^ parity) & 1){
for(x=0; x<w; x++){
uint8_t *prev= &p->ref[0][i][x + y*refs];
uint8_t *cur = &p->ref[1][i][x + y*refs];
uint8_t *next= &p->ref[2][i][x + y*refs];
uint8_t *prev2= (tff ^ parity) ? prev : cur ;
uint8_t *next2= (tff ^ parity) ? cur : next;
int c= cur[-refs];
int d= (prev2[0] + next2[0])>>1;
int e= cur[+refs];
int temporal_diff0= ABS(prev2[0] - next2[0]);
int temporal_diff1=( ABS(prev[-refs] - c) + ABS(prev[+refs] - e) )>>1;
int temporal_diff2=( ABS(next[-refs] - c) + ABS(next[+refs] - e) )>>1;
int diff= MAX3(temporal_diff0>>1, temporal_diff1, temporal_diff2);
int spatial_pred= (c+e)>>1;
int spatial_score= ABS(cur[-refs-1] - cur[+refs-1]) + ABS(c-e)
+ ABS(cur[-refs+1] - cur[+refs+1]);
for(j=-1; j<=1; j+=2){
int score= ABS(cur[-refs-1+j] - cur[+refs-1-j])
+ ABS(cur[-refs +j] - cur[+refs -j])
+ ABS(cur[-refs+1+j] - cur[+refs+1-j]) + 1;
if(score < spatial_score){
spatial_score= score;
spatial_pred= (cur[-refs +j] + cur[+refs -j])>>1;
}
}
if(p->mode<2){
int b= (prev2[-2*refs] + next2[-2*refs])>>1;
int f= (prev2[+2*refs] + next2[+2*refs])>>1;
#if 0
int a= cur[-3*refs];
int g= cur[+3*refs];
int max= MAX3(d-e, d-c, MIN3(MAX(b-c,f-e),MAX(b-c,b-a),MAX(f-g,f-e)) );
int min= MIN3(d-e, d-c, MAX3(MIN(b-c,f-e),MIN(b-c,b-a),MIN(f-g,f-e)) );
#else
int max= MAX3(d-e, d-c, MIN(b-c, f-e));
int min= MIN3(d-e, d-c, MAX(b-c, f-e));
#endif
diff= MAX3(diff, min, -max);
}
if(d < spatial_pred) d= MIN(d + diff, spatial_pred);
else d= MAX(d - diff, spatial_pred);
dst[i][x + y*dst_stride[i]]= d;
}
}else{
memcpy(&dst[i][y*dst_stride[i]], &p->ref[1][i][y*refs], w);
}
}
}
}
static int config(struct vf_instance_s* vf,
int width, int height, int d_width, int d_height,
unsigned int flags, unsigned int outfmt){
int i, j;
for(i=0; i<3; i++){
int is_chroma= !!i;
int w= ((width + 31) & (~31))>>is_chroma;
int h= ((height+6+ 31) & (~31))>>is_chroma;
vf->priv->stride[i]= w;
for(j=0; j<3; j++)
vf->priv->ref[j][i]= malloc(w*h*sizeof(uint8_t))+3*w;
}
return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
}
static int put_image(struct vf_instance_s* vf, mp_image_t *mpi, double pts){
mp_image_t *dmpi;
int ret=0;
int tff, i;
if(vf->priv->parity < 0) {
if (mpi->fields & MP_IMGFIELD_ORDERED)
tff = !!(mpi->fields & MP_IMGFIELD_TOP_FIRST);
else
tff = 1;
}
else tff = (vf->priv->parity&1)^1;
store_ref(vf->priv, mpi->planes, mpi->stride, mpi->w, mpi->h);
for(i=0; i<=(vf->priv->mode&1); i++){
dmpi=vf_get_image(vf->next,mpi->imgfmt,
MP_IMGTYPE_TEMP,
MP_IMGFLAG_ACCEPT_STRIDE|MP_IMGFLAG_PREFER_ALIGNED_STRIDE,
mpi->width,mpi->height);
vf_clone_mpi_attributes(dmpi, mpi);
filter(vf->priv, dmpi->planes, dmpi->stride, mpi->w, mpi->h, i ^ tff ^ 1, tff);
ret |= vf_next_put_image(vf, dmpi, pts /*FIXME*/);
if(i<(vf->priv->mode&1))
vf_next_control(vf, VFCTRL_FLIP_PAGE, NULL);
}
return ret;
}
static void uninit(struct vf_instance_s* vf){
int i;
if(!vf->priv) return;
for(i=0; i<3*3; i++){
uint8_t **p= &vf->priv->ref[i%3][i/3];
if(*p) free(*p - 3*vf->priv->stride[i/3]);
*p= NULL;
}
free(vf->priv);
vf->priv=NULL;
}
//===========================================================================//
static int query_format(struct vf_instance_s* vf, unsigned int fmt){
switch(fmt){
case IMGFMT_YV12:
case IMGFMT_I420:
case IMGFMT_IYUV:
case IMGFMT_Y800:
case IMGFMT_Y8:
return vf_next_query_format(vf,fmt);
}
return 0;
}
static int open(vf_instance_t *vf, char* args){
vf->config=config;
vf->put_image=put_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));
vf->priv->mode=0;
vf->priv->parity= -1;
if (args) sscanf(args, "%d:%d", &vf->priv->mode, &vf->priv->parity);
return 1;
}
vf_info_t vf_info_yadif = {
"Yet Another DeInterlacing Filter",
"yadif",
"Michael Niedermayer",
"",
open,
NULL
};
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