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Simplify mb_to_x_edge calculation during mode decoding

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Change-Id: Ibcb35c32bf24c1d241090e24c5e2320e4d3ba901
This commit is contained in:
Scott LaVarnway 2012-02-16 13:36:46 -05:00
parent a5879f7c81
commit 6776bd62b5
1 changed files with 15 additions and 15 deletions
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30
vp8/decoder/decodemv.c
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@ -334,8 +334,7 @@ static void decode_split_mv(vp8_reader *const bc, MODE_INFO *mi,
mbmi->partitioning = s;
}
static void read_mb_modes_mv(VP8D_COMP *pbi, MODE_INFO *mi, MB_MODE_INFO *mbmi,
int mb_col)
static void read_mb_modes_mv(VP8D_COMP *pbi, MODE_INFO *mi, MB_MODE_INFO *mbmi)
{
vp8_reader *const bc = & pbi->bc;
mbmi->ref_frame = (MV_REFERENCE_FRAME) vp8_read(bc, pbi->prob_intra);
@ -426,13 +425,6 @@ static void read_mb_modes_mv(VP8D_COMP *pbi, MODE_INFO *mi, MB_MODE_INFO *mbmi,
if( vp8_read(bc, vp8_mode_contexts [cnt[CNT_INTRA]] [0]) )
{
/* Distance of Mb to the various image edges.
* These specified to 8th pel as they are always compared to MV
* values that are in 1/8th pel units
*/
pbi->mb.mb_to_left_edge = -((mb_col * 16) << 3);
pbi->mb.mb_to_right_edge =
((pbi->common.mb_cols - 1 - mb_col) * 16) << 3;
/* If we have three distinct MV's ... */
/* See if above-left MV can be merged with NEAREST */
@ -593,7 +585,7 @@ static void read_mb_features(vp8_reader *r, MB_MODE_INFO *mi, MACROBLOCKD *x)
}
static void decode_mb_mode_mvs(VP8D_COMP *pbi, MODE_INFO *mi,
MB_MODE_INFO *mbmi, int mb_col)
MB_MODE_INFO *mbmi)
{
/* Read the Macroblock segmentation map if it is being updated explicitly
* this frame (reset to 0 above by default)
@ -614,7 +606,7 @@ static void decode_mb_mode_mvs(VP8D_COMP *pbi, MODE_INFO *mi,
if(pbi->common.frame_type == KEY_FRAME)
read_kf_modes(pbi, mi);
else
read_mb_modes_mv(pbi, mi, &mi->mbmi, mb_col);
read_mb_modes_mv(pbi, mi, &mi->mbmi);
}
@ -622,16 +614,20 @@ void vp8_decode_mode_mvs(VP8D_COMP *pbi)
{
MODE_INFO *mi = pbi->common.mi;
int mb_row = -1;
int mb_to_right_edge_start;
mb_mode_mv_init(pbi);
pbi->mb.mb_to_top_edge = 0;
pbi->mb.mb_to_bottom_edge = ((pbi->common.mb_rows - 1) * 16) << 3;
mb_to_right_edge_start = ((pbi->common.mb_cols - 1) * 16) << 3;
while (++mb_row < pbi->common.mb_rows)
{
int mb_col = -1;
pbi->mb.mb_to_top_edge = -((mb_row * 16)) << 3;
pbi->mb.mb_to_bottom_edge =
((pbi->common.mb_rows - 1 - mb_row) * 16) << 3;
pbi->mb.mb_to_left_edge = 0;
pbi->mb.mb_to_right_edge = mb_to_right_edge_start;
while (++mb_col < pbi->common.mb_cols)
{
@ -639,7 +635,7 @@ void vp8_decode_mode_mvs(VP8D_COMP *pbi)
int mb_num = mb_row * pbi->common.mb_cols + mb_col;
#endif
decode_mb_mode_mvs(pbi, mi, &mi->mbmi, mb_col);
decode_mb_mode_mvs(pbi, mi, &mi->mbmi);
#if CONFIG_ERROR_CONCEALMENT
/* look for corruption. set mvs_corrupt_from_mb to the current
@ -654,8 +650,12 @@ void vp8_decode_mode_mvs(VP8D_COMP *pbi)
}
#endif
pbi->mb.mb_to_left_edge -= (16 << 3);
pbi->mb.mb_to_right_edge -= (16 << 3);
mi++; /* next macroblock */
}
pbi->mb.mb_to_top_edge -= (16 << 3);
pbi->mb.mb_to_bottom_edge -= (16 << 3);
mi++; /* skip left predictor each row */
}