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Calculate mvd without abs()

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same speed (ask gcc why, i dont know)

Originally committed as revision 22035 to svn://svn.ffmpeg.org/ffmpeg/trunk
release/0.6
Michael Niedermayer 15 years ago
parent fce4448948
commit 81b5e4ee92
1 changed files with 18 additions and 14 deletions
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  1. 32
      libavcodec/h264_cabac.c

32
libavcodec/h264_cabac.c
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@ -909,11 +909,13 @@ static int decode_cabac_mb_ref( H264Context *h, int list, int n ) {
return ref;
}
static int decode_cabac_mb_mvd( H264Context *h, int ctxbase, int amvd ) {
static int decode_cabac_mb_mvd( H264Context *h, int ctxbase, int amvd, int *mvda) {
int mvd;
if(!get_cabac(&h->cabac, &h->cabac_state[ctxbase+(amvd>2)+(amvd>32)]))
if(!get_cabac(&h->cabac, &h->cabac_state[ctxbase+(amvd>2)+(amvd>32)])){
*mvda= 0;
return 0;
}
mvd= 1;
ctxbase+= 3;
@ -937,6 +939,7 @@ static int decode_cabac_mb_mvd( H264Context *h, int ctxbase, int amvd ) {
mvd += get_cabac_bypass( &h->cabac )<<k;
}
}
*mvda=mvd;
return get_cabac_bypass_sign( &h->cabac, -mvd );
}
@ -947,8 +950,8 @@ static int decode_cabac_mb_mvd( H264Context *h, int ctxbase, int amvd ) {
int amvd1 = h->mvd_cache[list][scan8[n] - 1][1] +\
h->mvd_cache[list][scan8[n] - 8][1];\
\
mx = mpx + decode_cabac_mb_mvd( h, 40, amvd0 );\
my = mpy + decode_cabac_mb_mvd( h, 47, amvd1 );\
mx += decode_cabac_mb_mvd( h, 40, amvd0, &mpx );\
my += decode_cabac_mb_mvd( h, 47, amvd1, &mpy );\
}
static av_always_inline int get_cabac_cbf_ctx( H264Context *h, int cat, int idx, int is_dc ) {
@ -1439,13 +1442,11 @@ decode_intra_mb:
const int index= 4*i + block_width*j;
int16_t (* mv_cache)[2]= &h->mv_cache[list][ scan8[index] ];
int16_t (* mvd_cache)[2]= &h->mvd_cache[list][ scan8[index] ];
pred_motion(h, index, block_width, list, h->ref_cache[list][ scan8[index] ], &mpx, &mpy);
pred_motion(h, index, block_width, list, h->ref_cache[list][ scan8[index] ], &mx, &my);
DECODE_CABAC_MB_MVD( h, list, index)
tprintf(s->avctx, "final mv:%d %d\n", mx, my);
mpx= abs(mpx-mx);
mpy= abs(mpy-my);
if(IS_SUB_8X8(sub_mb_type)){
mv_cache[ 1 ][0]=
mv_cache[ 8 ][0]= mv_cache[ 9 ][0]= mx;
@ -1487,7 +1488,7 @@ decode_intra_mb:
fill_rectangle(h->mvd_cache[1][scan8[0]], 4, 4, 8, 0, 4);
dct8x8_allowed &= h->sps.direct_8x8_inference_flag;
} else {
int list, mx, my, i, mpx, mpy;
int list, i;
if(IS_16X16(mb_type)){
for(list=0; list<h->list_count; list++){
if(IS_DIR(mb_type, 0, list)){
@ -1506,11 +1507,12 @@ decode_intra_mb:
}
for(list=0; list<h->list_count; list++){
if(IS_DIR(mb_type, 0, list)){
pred_motion(h, 0, 4, list, h->ref_cache[list][ scan8[0] ], &mpx, &mpy);
int mx,my,mpx,mpy;
pred_motion(h, 0, 4, list, h->ref_cache[list][ scan8[0] ], &mx, &my);
DECODE_CABAC_MB_MVD( h, list, 0)
tprintf(s->avctx, "final mv:%d %d\n", mx, my);
fill_rectangle(h->mvd_cache[list][ scan8[0] ], 4, 4, 8, pack16to32(abs(mx-mpx),abs(my-mpy)), 4);
fill_rectangle(h->mvd_cache[list][ scan8[0] ], 4, 4, 8, pack16to32(mpx,mpy), 4);
fill_rectangle(h->mv_cache[list][ scan8[0] ], 4, 4, 8, pack16to32(mx,my), 4);
}else
fill_rectangle(h->mv_cache[list][ scan8[0] ], 4, 4, 8, 0, 4);
@ -1537,11 +1539,12 @@ decode_intra_mb:
for(list=0; list<h->list_count; list++){
for(i=0; i<2; i++){
if(IS_DIR(mb_type, i, list)){
pred_16x8_motion(h, 8*i, list, h->ref_cache[list][scan8[0] + 16*i], &mpx, &mpy);
int mx,my,mpx,mpy;
pred_16x8_motion(h, 8*i, list, h->ref_cache[list][scan8[0] + 16*i], &mx, &my);
DECODE_CABAC_MB_MVD( h, list, 8*i)
tprintf(s->avctx, "final mv:%d %d\n", mx, my);
fill_rectangle(h->mvd_cache[list][ scan8[0] + 16*i ], 4, 2, 8, pack16to32(abs(mx-mpx),abs(my-mpy)), 4);
fill_rectangle(h->mvd_cache[list][ scan8[0] + 16*i ], 4, 2, 8, pack16to32(mpx,mpy), 4);
fill_rectangle(h->mv_cache[list][ scan8[0] + 16*i ], 4, 2, 8, pack16to32(mx,my), 4);
}else{
fill_rectangle(h->mvd_cache[list][ scan8[0] + 16*i ], 4, 2, 8, 0, 4);
@ -1571,11 +1574,12 @@ decode_intra_mb:
for(list=0; list<h->list_count; list++){
for(i=0; i<2; i++){
if(IS_DIR(mb_type, i, list)){
pred_8x16_motion(h, i*4, list, h->ref_cache[list][ scan8[0] + 2*i ], &mpx, &mpy);
int mx,my,mpx,mpy;
pred_8x16_motion(h, i*4, list, h->ref_cache[list][ scan8[0] + 2*i ], &mx, &my);
DECODE_CABAC_MB_MVD( h, list, 4*i)
tprintf(s->avctx, "final mv:%d %d\n", mx, my);
fill_rectangle(h->mvd_cache[list][ scan8[0] + 2*i ], 2, 4, 8, pack16to32(abs(mx-mpx),abs(my-mpy)), 4);
fill_rectangle(h->mvd_cache[list][ scan8[0] + 2*i ], 2, 4, 8, pack16to32(mpx,mpy), 4);
fill_rectangle(h->mv_cache[list][ scan8[0] + 2*i ], 2, 4, 8, pack16to32(mx,my), 4);
}else{
fill_rectangle(h->mvd_cache[list][ scan8[0] + 2*i ], 2, 4, 8, 0, 4);

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