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hevc/mvs: remove same prediction block 

cherry picked from commit 1206262ba1ef810328cadce99d5cdc0bf9285e4d

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Mickaël Raulet 2014-07-19 01:03:20 +02:00 committed by Michael Niedermayer
parent 560b0253ff
commit e9bb45ba79
1 changed files with 10 additions and 38 deletions
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48
libavcodec/hevc_mvs.c
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@ -88,34 +88,6 @@ static int z_scan_block_avail(HEVCContext *s, int xCurr, int yCurr,
}
}
static int same_prediction_block(HEVCLocalContext *lc, int log2_cb_size,
int x0, int y0, int nPbW, int nPbH,
int xA1, int yA1, int partIdx)
{
return !(nPbW << 1 == 1 << log2_cb_size &&
nPbH << 1 == 1 << log2_cb_size && partIdx == 1 &&
lc->cu.x + nPbW > xA1 &&
lc->cu.y + nPbH <= yA1);
}
/*
* 6.4.2 Derivation process for prediction block availability
*/
static int check_prediction_block_available(HEVCContext *s, int log2_cb_size,
int x0, int y0, int nPbW, int nPbH,
int xA1, int yA1, int partIdx)
{
HEVCLocalContext *lc = s->HEVClc;
if (lc->cu.x < xA1 && lc->cu.y < yA1 &&
(lc->cu.x + (1 << log2_cb_size)) > xA1 &&
(lc->cu.y + (1 << log2_cb_size)) > yA1)
return same_prediction_block(lc, log2_cb_size, x0, y0,
nPbW, nPbH, xA1, yA1, partIdx);
else
return z_scan_block_avail(s, x0, y0, xA1, yA1);
}
//check if the two luma locations belong to the same mostion estimation region
static int isDiffMER(HEVCContext *s, int xN, int yN, int xP, int yP)
{
@ -303,9 +275,7 @@ static int temporal_luma_motion_vector(HEVCContext *s, int x0, int y0,
(cand && !(TAB_MVF_PU(v).pred_flag == PF_INTRA))
#define PRED_BLOCK_AVAILABLE(v) \
check_prediction_block_available(s, log2_cb_size, \
x0, y0, nPbW, nPbH, \
x ## v, y ## v, part_idx)
z_scan_block_avail(s, x0, y0, x ## v, y ## v)
#define COMPARE_MV_REFIDX(a, b) \
compareMVrefidx(TAB_MVF_PU(a), TAB_MVF_PU(b))
@ -372,8 +342,6 @@ static void derive_spatial_merge_candidates(HEVCContext *s, int x0, int y0,
int is_available_b0;
int is_available_b1;
int is_available_b2;
int check_B0;
int check_A0;
//first left spatial merge candidate
is_available_a1 = AVAILABLE(cand_left, A1);
@ -411,9 +379,10 @@ static void derive_spatial_merge_candidates(HEVCContext *s, int x0, int y0,
// above right spatial merge candidate
check_MER = 1;
check_B0 = PRED_BLOCK_AVAILABLE(B0);
is_available_b0 = check_B0 && AVAILABLE(cand_up_right, B0);
is_available_b0 = AVAILABLE(cand_up_right, B0) &&
xB0 < s->sps->width &&
PRED_BLOCK_AVAILABLE(B0);
if (isDiffMER(s, xB0, yB0, x0, y0))
is_available_b0 = 0;
@ -429,9 +398,10 @@ static void derive_spatial_merge_candidates(HEVCContext *s, int x0, int y0,
// left bottom spatial merge candidate
check_MER = 1;
check_A0 = PRED_BLOCK_AVAILABLE(A0);
is_available_a0 = check_A0 && AVAILABLE(cand_bottom_left, A0);
is_available_a0 = AVAILABLE(cand_bottom_left, A0) &&
yA0 < s->sps->height &&
PRED_BLOCK_AVAILABLE(A0);
if (isDiffMER(s, xA0, yA0, x0, y0))
is_available_a0 = 0;
@ -698,7 +668,9 @@ void ff_hevc_luma_mv_mvp_mode(HEVCContext *s, int x0, int y0, int nPbW,
xA0_pu = xA0 >> s->sps->log2_min_pu_size;
yA0_pu = yA0 >> s->sps->log2_min_pu_size;
is_available_a0 = PRED_BLOCK_AVAILABLE(A0) && AVAILABLE(cand_bottom_left, A0);
is_available_a0 = AVAILABLE(cand_bottom_left, A0) &&
yA0 < s->sps->height &&
PRED_BLOCK_AVAILABLE(A0);
//left spatial merge candidate
xA1 = x0 - 1;