commit 37fe5fbced53b688da8220b1f653c561a84a2db6
author Yaowu Xu <yaowu@google.com> Tue May 09 11:43:45 2017 -0700
committer Yaowu Xu <yaowu@google.com> Tue May 09 21:25:02 2017 +0000
tree a63f80daea4b22de9b5b5c5d5889973c5b84ab6d
parent 446d037bdc7d30467ebfb58f6ea180168497caf9

Prevent access array with -1 index

Change-Id: I9fdf3b543a00700d47b3012b3de7b30ae455900f

av1/encoder/rdopt.c

diff --git a/av1/encoder/rdopt.c b/av1/encoder/rdopt.c
index 55e391c..79eea79 100644
--- a/av1/encoder/rdopt.c
+++ b/av1/encoder/rdopt.c
@@ -847,7 +847,7 @@
 static int prune_tx_types(const AV1_COMP *cpi, BLOCK_SIZE bsize, MACROBLOCK *x,
                           const MACROBLOCKD *const xd, int tx_set) {
 #if CONFIG_EXT_TX
-  const int *tx_set_1D = ext_tx_used_inter_1D[tx_set];
+  const int *tx_set_1D = tx_set >= 0 ? ext_tx_used_inter_1D[tx_set] : NULL;
 #else
   const int tx_set_1D[TX_TYPES_1D] = { 0 };
 #endif  // CONFIG_EXT_TX