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cleanup

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Originally committed as revision 1627 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2003-03-05 20:13:11 +00:00
parent 640950c700
commit 3c5ce6dc99
1 changed files with 1 additions and 68 deletions
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69
libavcodec/mpegvideo.c
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@ -2217,78 +2217,11 @@ static inline void clip_coeffs(MpegEncContext *s, DCTELEM *block, int last_index
if (level>maxlevel) level=maxlevel;
else if(level<minlevel) level=minlevel;
block[j]= level;
}
}
static inline void requantize_coeffs(MpegEncContext *s, DCTELEM block[64], int oldq, int newq, int n)
{
int i;
if(s->mb_intra){
i=1; //skip clipping of intra dc
//FIXME requantize, note (mpeg1/h263/h263p-aic dont need it,...)
}else
i=0;
for(;i<=s->block_last_index[n]; i++){
const int j = s->intra_scantable.permutated[i];
int level = block[j];
block[j]= ROUNDED_DIV(level*oldq, newq);
}
for(i=s->block_last_index[n]; i>=0; i--){
const int j = s->intra_scantable.permutated[i];
if(block[j]) break;
}
s->block_last_index[n]= i;
}
static inline void auto_requantize_coeffs(MpegEncContext *s, DCTELEM block[6][64])
{
int i,n, newq;
const int maxlevel= s->max_qcoeff;
const int minlevel= s->min_qcoeff;
int largest=0, smallest=0;
assert(s->adaptive_quant);
for(n=0; n<6; n++){
if(s->mb_intra){
i=1; //skip clipping of intra dc
//FIXME requantize, note (mpeg1/h263/h263p-aic dont need it,...)
}else
i=0;
for(;i<=s->block_last_index[n]; i++){
const int j = s->intra_scantable.permutated[i];
int level = block[n][j];
if(largest < level) largest = level;
if(smallest > level) smallest= level;
}
}
for(newq=s->qscale+1; newq<32; newq++){
if( ROUNDED_DIV(smallest*s->qscale, newq) >= minlevel
&& ROUNDED_DIV(largest *s->qscale, newq) <= maxlevel)
break;
}
if(s->out_format==FMT_H263){
/* h263 like formats cannot change qscale by more than 2 easiely */
if(s->avctx->qmin + 2 < newq)
newq= s->avctx->qmin + 2;
}
for(n=0; n<6; n++){
requantize_coeffs(s, block[n], s->qscale, newq, n);
clip_coeffs(s, block[n], s->block_last_index[n]);
}
s->dquant+= newq - s->qscale;
s->qscale= newq;
}
#if 0
static int pix_vcmp16x8(uint8_t *s, int stride){ //FIXME move to dsputil & optimize
int score=0;