Commit fb3e78a7 authored by Dmitry Kovalev's avatar Dmitry Kovalev
Browse files

vp9_get_pred_context_intra_inter cleanup.

Change-Id: I8beeee4c020425175f7d5ec83be86afa7b95da1a
parent 8259cdf2
......@@ -55,34 +55,28 @@ unsigned char vp9_get_pred_context_switchable_interp(const MACROBLOCKD *xd) {
}
// Returns a context number for the given MB prediction signal
unsigned char vp9_get_pred_context_intra_inter(const MACROBLOCKD *xd) {
int pred_context;
const MODE_INFO *const mi = xd->mode_info_context;
const MB_MODE_INFO *const above_mbmi = &mi[-xd->mode_info_stride].mbmi;
const MB_MODE_INFO *const left_mbmi = &mi[-1].mbmi;
const int left_in_image = xd->left_available && left_mbmi->mb_in_image;
const int above_in_image = xd->up_available && above_mbmi->mb_in_image;
// Note:
// The mode info data structure has a one element border above and to the
// left of the entries correpsonding to real macroblocks.
// The prediction flags in these dummy entries are initialised to 0.
if (above_in_image && left_in_image) { // both edges available
if (left_mbmi->ref_frame[0] == INTRA_FRAME &&
above_mbmi->ref_frame[0] == INTRA_FRAME) { // intra/intra (3)
pred_context = 3;
} else { // intra/inter (1) or inter/inter (0)
pred_context = left_mbmi->ref_frame[0] == INTRA_FRAME ||
above_mbmi->ref_frame[0] == INTRA_FRAME;
}
} else if (above_in_image || left_in_image) { // one edge available
const MB_MODE_INFO *edge_mbmi = above_in_image ? above_mbmi : left_mbmi;
const int left_intra = left_mbmi->ref_frame[0] == INTRA_FRAME;
const int above_intra = above_mbmi->ref_frame[0] == INTRA_FRAME;
// inter: 0, intra: 2
pred_context = 2 * (edge_mbmi->ref_frame[0] == INTRA_FRAME);
} else {
pred_context = 0;
}
assert(pred_context >= 0 && pred_context < INTRA_INTER_CONTEXTS);
return pred_context;
// 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.
// 0 - inter/inter, inter/--, --/inter, --/--
// 1 - intra/inter, inter/intra
// 2 - intra/--, --/intra
// 3 - intra/intra
if (above_in_image && left_in_image) // both edges available
return left_intra && above_intra ? 3
: left_intra || above_intra;
else if (above_in_image || left_in_image) // one edge available
return 2 * (above_in_image ? above_intra : left_intra);
else
return 0;
}
// Returns a context number for the given MB prediction signal
unsigned char vp9_get_pred_context_comp_inter_inter(const VP9_COMMON *cm,
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment