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change sws sharpen filter a little 

Originally committed as revision 17531 to svn://svn.mplayerhq.hu/mplayer/trunk/postproc
This commit is contained in:
Michael Niedermayer 2006-02-04 00:08:54 +00:00
parent 51d8321d04
commit 2e728364d3
1 changed files with 18 additions and 29 deletions
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47
postproc/swscale.c
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@ -2346,24 +2346,20 @@ SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
}
if(chromaSharpen!=0.0){
SwsVector *g= sws_getConstVec(-1.0, 3);
SwsVector *id= sws_getConstVec(10.0/chromaSharpen, 1);
g->coeff[1]=2.0;
sws_addVec(id, g);
sws_convVec(filter->chrH, id);
sws_convVec(filter->chrV, id);
sws_freeVec(g);
SwsVector *id= sws_getIdentityVec();
sws_scaleVec(filter->chrH, -chromaSharpen);
sws_scaleVec(filter->chrV, -chromaSharpen);
sws_addVec(filter->chrH, id);
sws_addVec(filter->chrV, id);
sws_freeVec(id);
}
if(lumaSharpen!=0.0){
SwsVector *g= sws_getConstVec(-1.0, 3);
SwsVector *id= sws_getConstVec(10.0/lumaSharpen, 1);
g->coeff[1]=2.0;
sws_addVec(id, g);
sws_convVec(filter->lumH, id);
sws_convVec(filter->lumV, id);
sws_freeVec(g);
SwsVector *id= sws_getIdentityVec();
sws_scaleVec(filter->lumH, -lumaSharpen);
sws_scaleVec(filter->lumV, -lumaSharpen);
sws_addVec(filter->lumH, id);
sws_addVec(filter->lumV, id);
sws_freeVec(id);
}
@ -2425,28 +2421,17 @@ SwsVector *sws_getConstVec(double c, int length){
SwsVector *sws_getIdentityVec(void){
double *coeff= memalign(sizeof(double), sizeof(double));
SwsVector *vec= malloc(sizeof(SwsVector));
coeff[0]= 1.0;
vec->coeff= coeff;
vec->length= 1;
return vec;
return sws_getConstVec(1.0, 1);
}
void sws_normalizeVec(SwsVector *a, double height){
double sws_dcVec(SwsVector *a){
int i;
double sum=0;
double inv;
double sum=0;
for(i=0; i<a->length; i++)
sum+= a->coeff[i];
inv= height/sum;
for(i=0; i<a->length; i++)
a->coeff[i]*= inv;
return sum;
}
void sws_scaleVec(SwsVector *a, double scalar){
@ -2456,6 +2441,10 @@ void sws_scaleVec(SwsVector *a, double scalar){
a->coeff[i]*= scalar;
}
void sws_normalizeVec(SwsVector *a, double height){
sws_scaleVec(a, height/sws_dcVec(a));
}
static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b){
int length= a->length + b->length - 1;
double *coeff= memalign(sizeof(double), length*sizeof(double));