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simplify intra prediction mode decoding 

Originally committed as revision 5612 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2006-07-04 17:06:43 +00:00
parent 5ca0106879
commit 784036e404
2 changed files with 10 additions and 20 deletions
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15
libavcodec/cavs.c
View File

@ -885,17 +885,14 @@ static int decode_mb_i(AVSContext *h) {
nA = h->pred_mode_Y[pos-1];
nB = h->pred_mode_Y[pos-3];
if((nA == NOT_AVAIL) || (nB == NOT_AVAIL))
predpred = 2;
else
predpred = FFMIN(nA,nB);
if(get_bits1(gb))
h->pred_mode_Y[pos] = predpred;
else {
h->pred_mode_Y[pos] = get_bits(gb,2);
if(h->pred_mode_Y[pos] >= predpred)
h->pred_mode_Y[pos]++;
if(predpred == NOT_AVAIL) // if either is not available
predpred = INTRA_L_LP;
if(!get_bits1(gb)){
int rem_mode= get_bits(gb, 2);
predpred = rem_mode + (rem_mode >= predpred);
}
h->pred_mode_Y[pos] = predpred;
}
pred_mode_uv = get_ue_golomb(gb);
if(pred_mode_uv > 6) {

13
libavcodec/h264.c
View File

@ -5258,18 +5258,11 @@ decode_intra_mb:
// fill_intra4x4_pred_table(h);
for(i=0; i<16; i+=di){
const int mode_coded= !get_bits1(&s->gb);
const int predicted_mode= pred_intra_mode(h, i);
int mode;
int mode= pred_intra_mode(h, i);
if(mode_coded){
if(!get_bits1(&s->gb)){
const int rem_mode= get_bits(&s->gb, 3);
if(rem_mode<predicted_mode)
mode= rem_mode;
else
mode= rem_mode + 1;
}else{
mode= predicted_mode;
mode = rem_mode + (rem_mode >= mode);
}
if(di==4)