[SCM] libav/experimental: simplify intra prediction mode decoding
siretart at users.alioth.debian.org
siretart at users.alioth.debian.org
Sun Jun 30 15:48:41 UTC 2013
The following commit has been merged in the experimental branch:
commit 784036e4044c971ecef0c14058f2770ca7d8bcd5
Author: Michael Niedermayer <michaelni at gmx.at>
Date: Tue Jul 4 17:06:43 2006 +0000
simplify intra prediction mode decoding
Originally committed as revision 5612 to svn://svn.ffmpeg.org/ffmpeg/trunk
diff --git a/libavcodec/cavs.c b/libavcodec/cavs.c
index a4f6963..996567c 100644
--- a/libavcodec/cavs.c
+++ b/libavcodec/cavs.c
@@ -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]++;
+ predpred = FFMIN(nA,nB);
+ 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) {
diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index 9470177..8012ae1 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -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)
--
Libav/FFmpeg packaging
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