From 5eeffc9fc59e21950b29a8b462629447da6cdaeb Mon Sep 17 00:00:00 2001
From: Dmitry Kovalev <dkovalev@google.com>
Date: Wed, 4 Dec 2013 21:35:30 -0800
Subject: [PATCH] Cleaning up vp9_get_pred_context_tx_size() function.
Change-Id: Ia6ef876e3d1e66b2182a9c0bce3fd758691cd381
---
vp9/common/vp9_pred_common.c | 35 +++++++++++++----------------------
1 file changed, 13 insertions(+), 22 deletions(-)
diff --git a/vp9/common/vp9_pred_common.c b/vp9/common/vp9_pred_common.c
index 22b66b57ac..a367f0b5d4 100644
--- a/vp9/common/vp9_pred_common.c
+++ b/vp9/common/vp9_pred_common.c
@@ -369,31 +369,22 @@ unsigned char vp9_get_pred_context_single_ref_p2(const MACROBLOCKD *xd) {
// left of the entries corresponding to real blocks.
// The prediction flags in these dummy entries are initialized to 0.
unsigned char vp9_get_pred_context_tx_size(const MACROBLOCKD *xd) {
- const MODE_INFO *const above_mi = get_above_mi(xd);
- const MODE_INFO *const left_mi = get_left_mi(xd);
- const MB_MODE_INFO *const above_mbmi = get_above_mbmi(above_mi);
- const MB_MODE_INFO *const left_mbmi = get_left_mbmi(left_mi);
- const int above_in_image = above_mi != NULL;
- const int left_in_image = left_mi != NULL;
const int max_tx_size = max_txsize_lookup[xd->mi_8x8[0]->mbmi.sb_type];
- int above_context = max_tx_size;
- int left_context = max_tx_size;
-
- if (above_in_image)
- above_context = above_mbmi->skip_coeff ? max_tx_size
- : above_mbmi->tx_size;
-
- if (left_in_image)
- left_context = left_mbmi->skip_coeff ? max_tx_size
- : left_mbmi->tx_size;
-
- if (!left_in_image)
- left_context = above_context;
+ const MB_MODE_INFO *const above_mbmi = get_above_mbmi(get_above_mi(xd));
+ const MB_MODE_INFO *const left_mbmi = get_left_mbmi(get_left_mi(xd));
+ const int has_above = above_mbmi != NULL;
+ const int has_left = left_mbmi != NULL;
+ int above_ctx = (has_above && !above_mbmi->skip_coeff) ? above_mbmi->tx_size
+ : max_tx_size;
+ int left_ctx = (has_left && !left_mbmi->skip_coeff) ? left_mbmi->tx_size
+ : max_tx_size;
+ if (!has_left)
+ left_ctx = above_ctx;
- if (!above_in_image)
- above_context = left_context;
+ if (!has_above)
+ above_ctx = left_ctx;
- return above_context + left_context > max_tx_size;
+ return (above_ctx + left_ctx) > max_tx_size;
}
int vp9_get_segment_id(VP9_COMMON *cm, const uint8_t *segment_ids,
--
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