vp9-noise estimate: Put check to avoid possible out of bounds.
Put check to avoid possible out of bounds when looping
over the blocks to estimate noise level.
No change in behavior.
Change-Id: I4b7b19b7edee0ae1c35b9dc0700b1bf9b304d7f5
diff --git a/vp9/encoder/vp9_noise_estimate.c b/vp9/encoder/vp9_noise_estimate.c
index b1a2619..e56cc9b 100644
--- a/vp9/encoder/vp9_noise_estimate.c
+++ b/vp9/encoder/vp9_noise_estimate.c
@@ -162,7 +162,9 @@
for (mi_row = 0; mi_row < cm->mi_rows; mi_row++) {
for (mi_col = 0; mi_col < cm->mi_cols; mi_col++) {
// 16x16 blocks, 1/4 sample of frame.
- if (mi_row % 4 == 0 && mi_col % 4 == 0) {
+ if (mi_row % 4 == 0 && mi_col % 4 == 0 &&
+ mi_row < cm->mi_rows - 1 &&
+ mi_col < cm->mi_cols - 1) {
int bl_index = mi_row * cm->mi_cols + mi_col;
int bl_index1 = bl_index + 1;
int bl_index2 = bl_index + cm->mi_cols;