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mpv/libmpcodecs/vf_pp7.c
gpoirier e746e16d88 -vf pp7 overblurs still parts of the image, which 
have qp=1, and qp becomes zero after the >> 1. Modifying the threshold
table for qp=0 so it copies the qp=1 case seems to fix the problem.
Patch by Jindrich Makovicka % makovick AH gmail P com %
Original thread:
Date: Jul 22, 2006 2:55 PM
Subject: [MPlayer-dev-eng] [PATCH] -vf pp7 artifacting in still MPEG2 images


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@19170 b3059339-0415-0410-9bf9-f77b7e298cf2
2006-07-23 13:38:20 +00:00

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/*
Copyright (C) 2005 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"
#include "cpudetect.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 XMIN(a,b) ((a) < (b) ? (a) : (b))
#define XMAX(a,b) ((a) > (b) ? (a) : (b))
typedef short DCTELEM;
//===========================================================================//
static const uint8_t __attribute__((aligned(8))) dither[8][8]={
{ 0, 48, 12, 60, 3, 51, 15, 63, },
{ 32, 16, 44, 28, 35, 19, 47, 31, },
{ 8, 56, 4, 52, 11, 59, 7, 55, },
{ 40, 24, 36, 20, 43, 27, 39, 23, },
{ 2, 50, 14, 62, 1, 49, 13, 61, },
{ 34, 18, 46, 30, 33, 17, 45, 29, },
{ 10, 58, 6, 54, 9, 57, 5, 53, },
{ 42, 26, 38, 22, 41, 25, 37, 21, },
};
struct vf_priv_s {
int qp;
int mode;
int mpeg2;
int temp_stride;
uint8_t *src;
};
#if 0
static inline void dct7_c(DCTELEM *dst, int s0, int s1, int s2, int s3, int step){
int s, d;
int dst2[64];
//#define S0 (1024/0.37796447300922719759)
#define C0 ((int)(1024*0.37796447300922719759+0.5)) //sqrt(1/7)
#define C1 ((int)(1024*0.53452248382484879308/6+0.5)) //sqrt(2/7)/6
#define C2 ((int)(1024*0.45221175985034745004/2+0.5))
#define C3 ((int)(1024*0.36264567479870879474/2+0.5))
//0.1962505182412941918 0.0149276808419397944-0.2111781990832339584
#define C4 ((int)(1024*0.1962505182412941918+0.5))
#define C5 ((int)(1024*0.0149276808419397944+0.5))
//#define C6 ((int)(1024*0.2111781990832339584+0.5))
#if 0
s= s0 + s1 + s2;
dst[0*step] = ((s + s3)*C0 + 512) >> 10;
s= (s - 6*s3)*C1 + 512;
d= (s0-s2)*C4 + (s1-s2)*C5;
dst[1*step] = (s + 2*d)>>10;
s -= d;
d= (s1-s0)*C2 + (s1-s2)*C3;
dst[2*step] = (s + d)>>10;
dst[3*step] = (s - d)>>10;
#elif 1
s = s3+s3;
s3= s-s0;
s0= s+s0;
s = s2+s1;
s2= s2-s1;
dst[0*step]= s0 + s;
dst[2*step]= s0 - s;
dst[1*step]= 2*s3 + s2;
dst[3*step]= s3 - 2*s2;
#else
int i,j,n=7;
for(i=0; i<7; i+=2){
dst2[i*step/2]= 0;
for(j=0; j<4; j++)
dst2[i*step/2] += src[j*step] * cos(i*M_PI/n*(j+0.5)) * sqrt((i?2.0:1.0)/n);
if(fabs(dst2[i*step/2] - dst[i*step/2]) > 20)
printf("%d %d %d (%d %d %d %d) -> (%d %d %d %d)\n", i,dst2[i*step/2], dst[i*step/2],src[0*step], src[1*step], src[2*step], src[3*step], dst[0*step], dst[1*step],dst[2*step],dst[3*step]);
}
#endif
}
#endif
static inline void dctA_c(DCTELEM *dst, uint8_t *src, int stride){
int i;
for(i=0; i<4; i++){
int s0= src[0*stride] + src[6*stride];
int s1= src[1*stride] + src[5*stride];
int s2= src[2*stride] + src[4*stride];
int s3= src[3*stride];
int s= s3+s3;
s3= s-s0;
s0= s+s0;
s = s2+s1;
s2= s2-s1;
dst[0]= s0 + s;
dst[2]= s0 - s;
dst[1]= 2*s3 + s2;
dst[3]= s3 - 2*s2;
src++;
dst+=4;
}
}
static void dctB_c(DCTELEM *dst, DCTELEM *src){
int i;
for(i=0; i<4; i++){
int s0= src[0*4] + src[6*4];
int s1= src[1*4] + src[5*4];
int s2= src[2*4] + src[4*4];
int s3= src[3*4];
int s= s3+s3;
s3= s-s0;
s0= s+s0;
s = s2+s1;
s2= s2-s1;
dst[0*4]= s0 + s;
dst[2*4]= s0 - s;
dst[1*4]= 2*s3 + s2;
dst[3*4]= s3 - 2*s2;
src++;
dst++;
}
}
#ifdef HAVE_MMX
static void dctB_mmx(DCTELEM *dst, DCTELEM *src){
asm volatile (
"movq (%0), %%mm0 \n\t"
"movq 1*4*2(%0), %%mm1 \n\t"
"paddw 6*4*2(%0), %%mm0 \n\t"
"paddw 5*4*2(%0), %%mm1 \n\t"
"movq 2*4*2(%0), %%mm2 \n\t"
"movq 3*4*2(%0), %%mm3 \n\t"
"paddw 4*4*2(%0), %%mm2 \n\t"
"paddw %%mm3, %%mm3 \n\t" //s
"movq %%mm3, %%mm4 \n\t" //s
"psubw %%mm0, %%mm3 \n\t" //s-s0
"paddw %%mm0, %%mm4 \n\t" //s+s0
"movq %%mm2, %%mm0 \n\t" //s2
"psubw %%mm1, %%mm2 \n\t" //s2-s1
"paddw %%mm1, %%mm0 \n\t" //s2+s1
"movq %%mm4, %%mm1 \n\t" //s0'
"psubw %%mm0, %%mm4 \n\t" //s0'-s'
"paddw %%mm0, %%mm1 \n\t" //s0'+s'
"movq %%mm3, %%mm0 \n\t" //s3'
"psubw %%mm2, %%mm3 \n\t"
"psubw %%mm2, %%mm3 \n\t"
"paddw %%mm0, %%mm2 \n\t"
"paddw %%mm0, %%mm2 \n\t"
"movq %%mm1, (%1) \n\t"
"movq %%mm4, 2*4*2(%1) \n\t"
"movq %%mm2, 1*4*2(%1) \n\t"
"movq %%mm3, 3*4*2(%1) \n\t"
:: "r" (src), "r"(dst)
);
}
#endif
static void (*dctB)(DCTELEM *dst, DCTELEM *src)= dctB_c;
#define N0 4
#define N1 5
#define N2 10
#define SN0 2
#define SN1 2.2360679775
#define SN2 3.16227766017
#define N (1<<16)
static const int factor[16]={
N/(N0*N0), N/(N0*N1), N/(N0*N0),N/(N0*N2),
N/(N1*N0), N/(N1*N1), N/(N1*N0),N/(N1*N2),
N/(N0*N0), N/(N0*N1), N/(N0*N0),N/(N0*N2),
N/(N2*N0), N/(N2*N1), N/(N2*N0),N/(N2*N2),
};
static const int thres[16]={
N/(SN0*SN0), N/(SN0*SN2), N/(SN0*SN0),N/(SN0*SN2),
N/(SN2*SN0), N/(SN2*SN2), N/(SN2*SN0),N/(SN2*SN2),
N/(SN0*SN0), N/(SN0*SN2), N/(SN0*SN0),N/(SN0*SN2),
N/(SN2*SN0), N/(SN2*SN2), N/(SN2*SN0),N/(SN2*SN2),
};
static int thres2[99][16];
static void init_thres2(void){
int qp, i;
int bias= 0; //FIXME
for(qp=0; qp<99; qp++){
for(i=0; i<16; i++){
thres2[qp][i]= ((i&1)?SN2:SN0) * ((i&4)?SN2:SN0) * XMAX(1,qp) * (1<<2) - 1 - bias;
}
}
}
static int hardthresh_c(DCTELEM *src, int qp){
int i;
int a;
a= src[0] * factor[0];
for(i=1; i<16; i++){
unsigned int threshold1= thres2[qp][i];
unsigned int threshold2= (threshold1<<1);
int level= src[i];
if(((unsigned)(level+threshold1))>threshold2){
a += level * factor[i];
}
}
return (a + (1<<11))>>12;
}
static int mediumthresh_c(DCTELEM *src, int qp){
int i;
int a;
a= src[0] * factor[0];
for(i=1; i<16; i++){
unsigned int threshold1= thres2[qp][i];
unsigned int threshold2= (threshold1<<1);
int level= src[i];
if(((unsigned)(level+threshold1))>threshold2){
if(((unsigned)(level+2*threshold1))>2*threshold2){
a += level * factor[i];
}else{
if(level>0) a+= 2*(level - (int)threshold1)*factor[i];
else a+= 2*(level + (int)threshold1)*factor[i];
}
}
}
return (a + (1<<11))>>12;
}
static int softthresh_c(DCTELEM *src, int qp){
int i;
int a;
a= src[0] * factor[0];
for(i=1; i<16; i++){
unsigned int threshold1= thres2[qp][i];
unsigned int threshold2= (threshold1<<1);
int level= src[i];
if(((unsigned)(level+threshold1))>threshold2){
if(level>0) a+= (level - (int)threshold1)*factor[i];
else a+= (level + (int)threshold1)*factor[i];
}
}
return (a + (1<<11))>>12;
}
static int (*requantize)(DCTELEM *src, int qp)= hardthresh_c;
static void filter(struct vf_priv_s *p, uint8_t *dst, uint8_t *src, int dst_stride, int src_stride, int width, int height, uint8_t *qp_store, int qp_stride, int is_luma){
int x, y;
const int stride= is_luma ? p->temp_stride : ((width+16+15)&(~15));
uint8_t *p_src= p->src + 8*stride;
DCTELEM *block= p->src;
DCTELEM *temp= p->src + 32;
if (!src || !dst) return; // HACK avoid crash for Y8 colourspace
for(y=0; y<height; y++){
int index= 8 + 8*stride + y*stride;
memcpy(p_src + index, src + y*src_stride, width);
for(x=0; x<8; x++){
p_src[index - x - 1]= p_src[index + x ];
p_src[index + width + x ]= p_src[index + width - x - 1];
}
}
for(y=0; y<8; y++){
memcpy(p_src + ( 7-y)*stride, p_src + ( y+8)*stride, stride);
memcpy(p_src + (height+8+y)*stride, p_src + (height-y+7)*stride, stride);
}
//FIXME (try edge emu)
for(y=0; y<height; y++){
for(x=-8; x<0; x+=4){
const int index= x + y*stride + (8-3)*(1+stride) + 8; //FIXME silly offset
uint8_t *src = p_src + index;
DCTELEM *tp= temp+4*x;
dctA_c(tp+4*8, src, stride);
}
for(x=0; x<width; ){
const int qps= 3 + is_luma;
int qp;
int end= XMIN(x+8, width);
if(p->qp)
qp= p->qp;
else{
qp= qp_store[ (XMIN(x, width-1)>>qps) + (XMIN(y, height-1)>>qps) * qp_stride];
if(p->mpeg2) qp>>=1;
}
for(; x<end; x++){
const int index= x + y*stride + (8-3)*(1+stride) + 8; //FIXME silly offset
uint8_t *src = p_src + index;
DCTELEM *tp= temp+4*x;
int v;
if((x&3)==0)
dctA_c(tp+4*8, src, stride);
dctB(block, tp);
v= requantize(block, qp);
v= (v + dither[y&7][x&7])>>6;
if((unsigned)v > 255)
v= (-v)>>31;
dst[x + y*dst_stride]= v;
}
}
}
}
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 h= (height+16+15)&(~15);
vf->priv->temp_stride= (width+16+15)&(~15);
vf->priv->src = memalign(8, vf->priv->temp_stride*(h+8)*sizeof(uint8_t));
return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
}
static void get_image(struct vf_instance_s* vf, mp_image_t *mpi){
if(mpi->flags&MP_IMGFLAG_PRESERVE) return; // don't change
// ok, we can do pp in-place (or pp disabled):
vf->dmpi=vf_get_image(vf->next,mpi->imgfmt,
mpi->type, mpi->flags | MP_IMGFLAG_READABLE, mpi->width, mpi->height);
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_s* vf, mp_image_t *mpi, double pts){
mp_image_t *dmpi;
if(mpi->flags&MP_IMGFLAG_DIRECT){
dmpi=vf->dmpi;
}else{
// no DR, so get a new image! hope we'll get DR buffer:
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);
}
vf->priv->mpeg2= mpi->qscale_type;
if(mpi->qscale || vf->priv->qp){
filter(vf->priv, dmpi->planes[0], mpi->planes[0], dmpi->stride[0], mpi->stride[0], mpi->w, mpi->h, mpi->qscale, mpi->qstride, 1);
filter(vf->priv, dmpi->planes[1], mpi->planes[1], dmpi->stride[1], mpi->stride[1], mpi->w>>mpi->chroma_x_shift, mpi->h>>mpi->chroma_y_shift, mpi->qscale, mpi->qstride, 0);
filter(vf->priv, dmpi->planes[2], mpi->planes[2], dmpi->stride[2], mpi->stride[2], mpi->w>>mpi->chroma_x_shift, mpi->h>>mpi->chroma_y_shift, mpi->qscale, mpi->qstride, 0);
}else{
memcpy_pic(dmpi->planes[0], mpi->planes[0], mpi->w, mpi->h, dmpi->stride[0], mpi->stride[0]);
memcpy_pic(dmpi->planes[1], mpi->planes[1], mpi->w>>mpi->chroma_x_shift, mpi->h>>mpi->chroma_y_shift, dmpi->stride[1], mpi->stride[1]);
memcpy_pic(dmpi->planes[2], mpi->planes[2], mpi->w>>mpi->chroma_x_shift, mpi->h>>mpi->chroma_y_shift, dmpi->stride[2], mpi->stride[2]);
}
#ifdef HAVE_MMX
if(gCpuCaps.hasMMX) asm volatile ("emms\n\t");
#endif
#ifdef HAVE_MMX2
if(gCpuCaps.hasMMX2) asm volatile ("sfence\n\t");
#endif
return vf_next_put_image(vf,dmpi, pts);
}
static void uninit(struct vf_instance_s* vf){
if(!vf->priv) return;
if(vf->priv->src) free(vf->priv->src);
vf->priv->src= NULL;
free(vf->priv);
vf->priv=NULL;
}
//===========================================================================//
static int query_format(struct vf_instance_s* vf, unsigned int fmt){
switch(fmt){
case IMGFMT_YVU9:
case IMGFMT_IF09:
case IMGFMT_YV12:
case IMGFMT_I420:
case IMGFMT_IYUV:
case IMGFMT_CLPL:
case IMGFMT_Y800:
case IMGFMT_Y8:
case IMGFMT_444P:
case IMGFMT_422P:
case IMGFMT_411P:
return vf_next_query_format(vf,fmt);
}
return 0;
}
static int control(struct vf_instance_s* vf, int request, void* data){
return vf_next_control(vf,request,data);
}
static int 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->control= control;
vf->priv=malloc(sizeof(struct vf_priv_s));
memset(vf->priv, 0, sizeof(struct vf_priv_s));
if (args) sscanf(args, "%d:%d", &vf->priv->qp, &vf->priv->mode);
if(vf->priv->qp < 0)
vf->priv->qp = 0;
init_thres2();
switch(vf->priv->mode){
case 0: requantize= hardthresh_c; break;
case 1: requantize= softthresh_c; break;
default:
case 2: requantize= mediumthresh_c; break;
}
#ifdef HAVE_MMX
if(gCpuCaps.hasMMX){
dctB= dctB_mmx;
}
#endif
#if 0
if(gCpuCaps.hasMMX){
switch(vf->priv->mode){
case 0: requantize= hardthresh_mmx; break;
case 1: requantize= softthresh_mmx; break;
}
}
#endif
return 1;
}
vf_info_t vf_info_pp7 = {
"postprocess 7",
"pp7",
"Michael Niedermayer",
"",
open,
NULL
};
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