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hevc/mvs: simplifying derive_spatial_merge_candidates function 

cherry picked from commit 99be11cf08a5628d0bb6ac7f4958bf9dd35cda62

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Mickaël Raulet 2014-07-19 01:12:24 +02:00 committed by Michael Niedermayer
parent e9bb45ba79
commit c4d63cd230
1 changed files with 29 additions and 52 deletions
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81
libavcodec/hevc_mvs.c
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@ -329,8 +329,6 @@ static void derive_spatial_merge_candidates(HEVCContext *s, int x0, int y0,
const int nb_refs = (s->sh.slice_type == P_SLICE) ?
s->sh.nb_refs[0] : FFMIN(s->sh.nb_refs[0], s->sh.nb_refs[1]);
int check_MER = 1;
int check_MER_1 = 1;
int zero_idx = 0;
@ -343,8 +341,6 @@ static void derive_spatial_merge_candidates(HEVCContext *s, int x0, int y0,
int is_available_b1;
int is_available_b2;
//first left spatial merge candidate
is_available_a1 = AVAILABLE(cand_left, A1);
if (!singleMCLFlag && part_idx == 1 &&
(lc->cu.part_mode == PART_Nx2N ||
@ -352,84 +348,65 @@ static void derive_spatial_merge_candidates(HEVCContext *s, int x0, int y0,
lc->cu.part_mode == PART_nRx2N) ||
isDiffMER(s, xA1, yA1, x0, y0)) {
is_available_a1 = 0;
} else {
is_available_a1 = AVAILABLE(cand_left, A1);
if (is_available_a1) {
mergecandlist[nb_merge_cand] = TAB_MVF_PU(A1);
if (merge_idx == 0) return;
nb_merge_cand++;
}
}
if (is_available_a1) {
mergecandlist[0] = TAB_MVF_PU(A1);
if (merge_idx == 0) return;
nb_merge_cand++;
}
// above spatial merge candidate
is_available_b1 = AVAILABLE(cand_up, B1);
if (!singleMCLFlag && part_idx == 1 &&
(lc->cu.part_mode == PART_2NxN ||
lc->cu.part_mode == PART_2NxnU ||
lc->cu.part_mode == PART_2NxnD) ||
isDiffMER(s, xB1, yB1, x0, y0)) {
is_available_b1 = 0;
} else {
is_available_b1 = AVAILABLE(cand_up, B1);
if (is_available_b1 &&
!(is_available_a1 && COMPARE_MV_REFIDX(B1, A1))) {
mergecandlist[nb_merge_cand] = TAB_MVF_PU(B1);
if (merge_idx == nb_merge_cand) return;
nb_merge_cand++;
}
}
if (is_available_a1 && is_available_b1)
check_MER = !COMPARE_MV_REFIDX(B1, A1);
if (is_available_b1 && check_MER)
mergecandlist[nb_merge_cand++] = TAB_MVF_PU(B1);
// above right spatial merge candidate
check_MER = 1;
is_available_b0 = AVAILABLE(cand_up_right, B0) &&
xB0 < s->sps->width &&
PRED_BLOCK_AVAILABLE(B0);
PRED_BLOCK_AVAILABLE(B0) &&
!isDiffMER(s, xB0, yB0, x0, y0);
if (isDiffMER(s, xB0, yB0, x0, y0))
is_available_b0 = 0;
if (is_available_b1 && is_available_b0)
check_MER = !COMPARE_MV_REFIDX(B0, B1);
if (is_available_b0 && check_MER) {
if (is_available_b0 &&
!(is_available_b1 && COMPARE_MV_REFIDX(B0, B1))) {
mergecandlist[nb_merge_cand] = TAB_MVF_PU(B0);
if (merge_idx == nb_merge_cand) return;
nb_merge_cand++;
}
// left bottom spatial merge candidate
check_MER = 1;
is_available_a0 = AVAILABLE(cand_bottom_left, A0) &&
yA0 < s->sps->height &&
PRED_BLOCK_AVAILABLE(A0);
PRED_BLOCK_AVAILABLE(A0) &&
!isDiffMER(s, xA0, yA0, x0, y0);
if (isDiffMER(s, xA0, yA0, x0, y0))
is_available_a0 = 0;
if (is_available_a1 && is_available_a0)
check_MER = !COMPARE_MV_REFIDX(A0, A1);
if (is_available_a0 && check_MER) {
if (is_available_a0 &&
!(is_available_a1 && COMPARE_MV_REFIDX(A0, A1))) {
mergecandlist[nb_merge_cand] = TAB_MVF_PU(A0);
if (merge_idx == nb_merge_cand) return;
nb_merge_cand++;
}
// above left spatial merge candidate
check_MER = 1;
is_available_b2 = AVAILABLE(cand_up_left, B2) &&
!isDiffMER(s, xB2, yB2, x0, y0);
is_available_b2 = AVAILABLE(cand_up_left, B2);
if (isDiffMER(s, xB2, yB2, x0, y0))
is_available_b2 = 0;
if (is_available_a1 && is_available_b2)
check_MER = !COMPARE_MV_REFIDX(B2, A1);
if (is_available_b1 && is_available_b2)
check_MER_1 = !COMPARE_MV_REFIDX(B2, B1);
if (is_available_b2 && check_MER && check_MER_1 && nb_merge_cand != 4) {
if (is_available_b2 &&
!(is_available_a1 && COMPARE_MV_REFIDX(B2, A1)) &&
!(is_available_b1 && COMPARE_MV_REFIDX(B2, B1)) &&
nb_merge_cand != 4) {
mergecandlist[nb_merge_cand] = TAB_MVF_PU(B2);
if (merge_idx == nb_merge_cand) return;
nb_merge_cand++;