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Merge "added code to clear 2nd order block when appropriate"

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This commit is contained in:
Yaowu Xu 2011-11-02 08:22:58 -07:00 committed by Gerrit Code Review
commit 8002c31804
2 changed files with 45 additions and 2 deletions
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3
vp8/encoder/encodeintra.c
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@ -94,7 +94,8 @@ void vp8_encode_intra16x16mby(const VP8_ENCODER_RTCD *rtcd, MACROBLOCK *x)
RECON_INVOKE(&rtcd->common->recon, build_intra_predictors_mby)(&x->e_mbd);
ENCODEMB_INVOKE(&rtcd->encodemb, submby)(x->src_diff, *(b->base_src), x->e_mbd.predictor, b->src_stride);
ENCODEMB_INVOKE(&rtcd->encodemb, submby)(x->src_diff, *(b->base_src),
x->e_mbd.predictor, b->src_stride);
vp8_transform_intra_mby(x);

44
vp8/encoder/encodemb.c
View File

@ -469,12 +469,50 @@ static void optimize_b(MACROBLOCK *mb, int ib, int type,
d->eob = final_eob;
*a = *l = (d->eob != !type);
}
static void check_reset_2nd_coeffs(MACROBLOCKD *x, int type,
ENTROPY_CONTEXT *a, ENTROPY_CONTEXT *l)
{
int sum=0;
int i;
BLOCKD *bd = &x->block[24];
if(bd->dequant[0]>=35 && bd->dequant[1]>=35)
return;
for(i=0;i<bd->eob;i++)
{
int coef = bd->dqcoeff[vp8_default_zig_zag1d[i]];
sum+= (coef>=0)?coef:-coef;
if(sum>=35)
return;
}
/**************************************************************************
our inverse hadamard transform effectively is weighted sum of all 16 inputs
with weight either 1 or -1. It has a last stage scaling of (sum+3)>>3. And
dc only idct is (dc+4)>>3. So if all the sums are between -35 and 29, the
output after inverse wht and idct will be all zero. A sum of absolute value
smaller than 35 guarantees all 16 different (+1/-1) weighted sums in wht
fall between -35 and +35.
**************************************************************************/
if(sum < 35)
{
for(i=0;i<bd->eob;i++)
{
int rc = vp8_default_zig_zag1d[i];
bd->qcoeff[rc]=0;
bd->dqcoeff[rc]=0;
}
bd->eob = 0;
*a = *l = (bd->eob != !type);
}
}
static void optimize_mb(MACROBLOCK *x, const VP8_ENCODER_RTCD *rtcd)
{
int b;
int type;
int has_2nd_order;
ENTROPY_CONTEXT_PLANES t_above, t_left;
ENTROPY_CONTEXT *ta;
ENTROPY_CONTEXT *tl;
@ -506,6 +544,8 @@ static void optimize_mb(MACROBLOCK *x, const VP8_ENCODER_RTCD *rtcd)
b=24;
optimize_b(x, b, PLANE_TYPE_Y2,
ta + vp8_block2above[b], tl + vp8_block2left[b], rtcd);
check_reset_2nd_coeffs(&x->e_mbd, PLANE_TYPE_Y2,
ta + vp8_block2above[b], tl + vp8_block2left[b]);
}
}
@ -539,7 +579,7 @@ void vp8_optimize_mby(MACROBLOCK *x, const VP8_ENCODER_RTCD *rtcd)
for (b = 0; b < 16; b++)
{
optimize_b(x, b, type,
ta + vp8_block2above[b], tl + vp8_block2left[b], rtcd);
ta + vp8_block2above[b], tl + vp8_block2left[b], rtcd);
}
@ -548,6 +588,8 @@ void vp8_optimize_mby(MACROBLOCK *x, const VP8_ENCODER_RTCD *rtcd)
b=24;
optimize_b(x, b, PLANE_TYPE_Y2,
ta + vp8_block2above[b], tl + vp8_block2left[b], rtcd);
check_reset_2nd_coeffs(&x->e_mbd, PLANE_TYPE_Y2,
ta + vp8_block2above[b], tl + vp8_block2left[b]);
}
}