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vc1dec: Remove separate scaling function for interlaced field MVs

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The scaling process for obtaining direct MVs from co-located field MVs
is the same for interlaced field and progressive pictures.

Signed-off-by: Kostya Shishkov <kostya.shishkov@gmail.com>
This commit is contained in:
Mashiat Sarker Shakkhar 2012-08-03 20:53:36 +06:00 committed by Kostya Shishkov
parent 8379ea5e9f
commit 9cc74c9f6e
1 changed files with 8 additions and 22 deletions
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30
libavcodec/vc1dec.c
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@ -1977,20 +1977,6 @@ static av_always_inline int scale_mv(int value, int bfrac, int inv, int qs)
#endif
}
static av_always_inline int scale_mv_intfi(int value, int bfrac, int inv,
int qs, int qs_last)
{
int n = bfrac;
if (inv)
n -= 256;
n <<= !qs_last;
if (!qs)
return (value * n + 255) >> 9;
else
return (value * n + 128) >> 8;
}
/** Reconstruct motion vector for B-frame and do motion compensation
*/
static inline void vc1_b_mc(VC1Context *v, int dmv_x[2], int dmv_y[2],
@ -2244,14 +2230,14 @@ static inline void vc1_pred_b_mv_intfi(VC1Context *v, int n, int *dmv_x, int *dm
if (v->bmvtype == BMV_TYPE_DIRECT) {
int total_opp, k, f;
if (s->next_picture.f.mb_type[mb_pos + v->mb_off] != MB_TYPE_INTRA) {
s->mv[0][0][0] = scale_mv_intfi(s->next_picture.f.motion_val[1][s->block_index[0] + v->blocks_off][0],
v->bfraction, 0, s->quarter_sample, v->qs_last);
s->mv[0][0][1] = scale_mv_intfi(s->next_picture.f.motion_val[1][s->block_index[0] + v->blocks_off][1],
v->bfraction, 0, s->quarter_sample, v->qs_last);
s->mv[1][0][0] = scale_mv_intfi(s->next_picture.f.motion_val[1][s->block_index[0] + v->blocks_off][0],
v->bfraction, 1, s->quarter_sample, v->qs_last);
s->mv[1][0][1] = scale_mv_intfi(s->next_picture.f.motion_val[1][s->block_index[0] + v->blocks_off][1],
v->bfraction, 1, s->quarter_sample, v->qs_last);
s->mv[0][0][0] = scale_mv(s->next_picture.f.motion_val[1][s->block_index[0] + v->blocks_off][0],
v->bfraction, 0, s->quarter_sample);
s->mv[0][0][1] = scale_mv(s->next_picture.f.motion_val[1][s->block_index[0] + v->blocks_off][1],
v->bfraction, 0, s->quarter_sample);
s->mv[1][0][0] = scale_mv(s->next_picture.f.motion_val[1][s->block_index[0] + v->blocks_off][0],
v->bfraction, 1, s->quarter_sample);
s->mv[1][0][1] = scale_mv(s->next_picture.f.motion_val[1][s->block_index[0] + v->blocks_off][1],
v->bfraction, 1, s->quarter_sample);
total_opp = v->mv_f_next[0][s->block_index[0] + v->blocks_off]
+ v->mv_f_next[0][s->block_index[1] + v->blocks_off]