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VP9: refactor read_switchable_interp_filter()

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Change-Id: I8f88b7ff21a0991297860c4a744a014629b0fa05
This commit is contained in:
Scott LaVarnway 2016-04-06 04:53:43 -07:00
parent 89b1c9d4be
commit 25920137ec
1 changed files with 33 additions and 4 deletions
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37
vp9/decoder/vp9_decodemv.c
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@ -353,11 +353,36 @@ static void read_ref_frames(VP9_COMMON *const cm, MACROBLOCKD *const xd,
}
}
// TODO(slavarnway): Move this decoder version of
// vp9_get_pred_context_switchable_interp() to vp9_pred_common.h and update the
// encoder.
//
// Returns a context number for the given MB prediction signal
static int dec_get_pred_context_switchable_interp(const MACROBLOCKD *xd) {
// Note:
// The mode info data structure has a one element border above and to the
// left of the entries corresponding to real macroblocks.
// The prediction flags in these dummy entries are initialized to 0.
const MODE_INFO *const left_mi = xd->left_mi;
const int left_type = left_mi ? left_mi->interp_filter : SWITCHABLE_FILTERS;
const MODE_INFO *const above_mi = xd->above_mi;
const int above_type = above_mi ? above_mi->interp_filter
: SWITCHABLE_FILTERS;
if (left_type == above_type)
return left_type;
else if (left_type == SWITCHABLE_FILTERS && above_type != SWITCHABLE_FILTERS)
return above_type;
else if (left_type != SWITCHABLE_FILTERS && above_type == SWITCHABLE_FILTERS)
return left_type;
else
return SWITCHABLE_FILTERS;
}
static INLINE INTERP_FILTER read_switchable_interp_filter(
VP9_COMMON *const cm, MACROBLOCKD *const xd,
vpx_reader *r) {
const int ctx = vp9_get_pred_context_switchable_interp(xd);
const int ctx = dec_get_pred_context_switchable_interp(xd);
const INTERP_FILTER type =
(INTERP_FILTER)vpx_read_tree(r, vp9_switchable_interp_tree,
cm->fc->switchable_interp_prob[ctx]);
@ -373,9 +398,6 @@ static void read_intra_block_mode_info(VP9_COMMON *const cm,
const BLOCK_SIZE bsize = mi->sb_type;
int i;
mi->ref_frame[0] = INTRA_FRAME;
mi->ref_frame[1] = NONE;
switch (bsize) {
case BLOCK_4X4:
for (i = 0; i < 4; ++i)
@ -399,6 +421,13 @@ static void read_intra_block_mode_info(VP9_COMMON *const cm,
}
mi->uv_mode = read_intra_mode_uv(cm, xd, r, mi->mode);
// Initialize interp_filter here so we do not have to check for inter block
// modes in dec_get_pred_context_switchable_interp()
mi->interp_filter = SWITCHABLE_FILTERS;
mi->ref_frame[0] = INTRA_FRAME;
mi->ref_frame[1] = NONE;
}
static INLINE int is_mv_valid(const MV *mv) {