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blinking blocks around thin vertical lines and dots bugfix

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Originally committed as revision 1988 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer
2003-06-26 11:31:34 +00:00
parent e3ee328330
commit cb482d2511
2 changed files with 125 additions and 84 deletions
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72
libavcodec/libpostproc/postprocess.c
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@@ -243,11 +243,79 @@ static inline int isVertDC_C(uint8_t src[], int stride, PPContext *c){
static inline int isHorizMinMaxOk(uint8_t src[], int stride, int QP)
{
if(abs(src[0] - src[7]) > 2*QP) return 0;
int i;
#if 1
for(i=0; i<2; i++){
if((unsigned)(src[0] - src[5] + 2*QP) > 4*QP) return 0;
src += stride;
if((unsigned)(src[2] - src[7] + 2*QP) > 4*QP) return 0;
src += stride;
if((unsigned)(src[4] - src[1] + 2*QP) > 4*QP) return 0;
src += stride;
if((unsigned)(src[6] - src[3] + 2*QP) > 4*QP) return 0;
src += stride;
}
#else
for(i=0; i<8; i++){
if((unsigned)(src[0] - src[7] + 2*QP) > 4*QP) return 0;
src += stride;
}
#endif
return 1;
}
static inline int isVertMinMaxOk_C(uint8_t src[], int stride, int QP)
{
#if 1
#if 1
int x;
src+= stride*4;
for(x=0; x<BLOCK_SIZE; x+=4)
{
if((unsigned)(src[ x + 0*stride] - src[ x + 5*stride] + 2*QP) > 4*QP) return 0;
if((unsigned)(src[1+x + 2*stride] - src[1+x + 7*stride] + 2*QP) > 4*QP) return 0;
if((unsigned)(src[2+x + 4*stride] - src[2+x + 1*stride] + 2*QP) > 4*QP) return 0;
if((unsigned)(src[3+x + 6*stride] - src[3+x + 3*stride] + 2*QP) > 4*QP) return 0;
}
#else
int x;
src+= stride*3;
for(x=0; x<BLOCK_SIZE; x++)
{
if((unsigned)(src[x + stride] - src[x + (stride<<3)] + 2*QP) > 4*QP) return 0;
}
#endif
return 1;
#else
int x;
src+= stride*4;
for(x=0; x<BLOCK_SIZE; x++)
{
int min=255;
int max=0;
int y;
for(y=0; y<8; y++){
int v= src[x + y*stride];
if(v>max) max=v;
if(v<min) min=v;
}
if(max-min > 2*QP) return 0;
}
return 1;
#endif
}
static inline int vertClassify_C(uint8_t src[], int stride, PPContext *c){
if( isVertDC_C(src, stride, c) ){
if( isVertMinMaxOk_C(src, stride, c->QP) )
return 1;
else
return 0;
}else{
return 2;
}
}
static inline void doHorizDefFilter(uint8_t dst[], int stride, int QP)
{
int y;