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Code Issues Releases Activity

avcodec/vc1: Simplify pred/mc loops

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
zhaoxiu.zeng 2015-02-25 00:28:45 +08:00 committed by Michael Niedermayer
parent d8e030c3cc
commit f6b195cfb9
1 changed files with 25 additions and 37 deletions
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62
libavcodec/vc1_block.c
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@ -1677,19 +1677,14 @@ static int vc1_decode_p_mb_intfr(VC1Context *v)
dst_idx = 0;
if (fourmv) {
mvbp = v->fourmvbp;
for (i = 0; i < 6; i++) {
if (i < 4) {
dmv_x = dmv_y = 0;
val = ((mvbp >> (3 - i)) & 1);
if (val) {
get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
}
ff_vc1_pred_mv_intfr(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], 0);
ff_vc1_mc_4mv_luma(v, i, 0, 0);
} else if (i == 4) {
ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
}
for (i = 0; i < 4; i++) {
dmv_x = dmv_y = 0;
if (mvbp & (8 >> i))
get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
ff_vc1_pred_mv_intfr(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], 0);
ff_vc1_mc_4mv_luma(v, i, 0, 0);
}
ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
} else if (twomv) {
mvbp = v->twomvbp;
dmv_x = dmv_y = 0;
@ -1836,18 +1831,14 @@ static int vc1_decode_p_mb_intfi(VC1Context *v)
mb_has_coeffs = !(idx_mbmode & 2);
} else { // 4-MV
v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
for (i = 0; i < 6; i++) {
if (i < 4) {
dmv_x = dmv_y = pred_flag = 0;
val = ((v->fourmvbp >> (3 - i)) & 1);
if (val) {
get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag);
}
ff_vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0);
ff_vc1_mc_4mv_luma(v, i, 0, 0);
} else if (i == 4)
ff_vc1_mc_4mv_chroma(v, 0);
for (i = 0; i < 4; i++) {
dmv_x = dmv_y = pred_flag = 0;
if (v->fourmvbp & (8 >> i))
get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag);
ff_vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0);
ff_vc1_mc_4mv_luma(v, i, 0, 0);
}
ff_vc1_mc_4mv_chroma(v, 0);
mb_has_coeffs = idx_mbmode & 1;
}
if (mb_has_coeffs)
@ -2154,21 +2145,18 @@ static void vc1_decode_b_mb_intfi(VC1Context *v)
bmvtype = BMV_TYPE_FORWARD;
v->bmvtype = bmvtype;
v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
for (i = 0; i < 6; i++) {
if (i < 4) {
dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;
dmv_x[1] = dmv_y[1] = pred_flag[1] = 0;
val = ((v->fourmvbp >> (3 - i)) & 1);
if (val) {
get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD],
&dmv_y[bmvtype == BMV_TYPE_BACKWARD],
&pred_flag[bmvtype == BMV_TYPE_BACKWARD]);
}
ff_vc1_pred_b_mv_intfi(v, i, dmv_x, dmv_y, 0, pred_flag);
ff_vc1_mc_4mv_luma(v, i, bmvtype == BMV_TYPE_BACKWARD, 0);
} else if (i == 4)
ff_vc1_mc_4mv_chroma(v, bmvtype == BMV_TYPE_BACKWARD);
for (i = 0; i < 4; i++) {
dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;
dmv_x[1] = dmv_y[1] = pred_flag[1] = 0;
if (v->fourmvbp & (8 >> i)) {
get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD],
&dmv_y[bmvtype == BMV_TYPE_BACKWARD],
&pred_flag[bmvtype == BMV_TYPE_BACKWARD]);
}
ff_vc1_pred_b_mv_intfi(v, i, dmv_x, dmv_y, 0, pred_flag);
ff_vc1_mc_4mv_luma(v, i, bmvtype == BMV_TYPE_BACKWARD, 0);
}
ff_vc1_mc_4mv_chroma(v, bmvtype == BMV_TYPE_BACKWARD);
mb_has_coeffs = idx_mbmode & 1;
}
if (mb_has_coeffs)