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Fixed potential overflows

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The two arrays are typically initialized to INT64_MAX, if they are not
filled with valid values before the addition, the values can overflow
and lead to wrong results.

Change-Id: I515de22cf3e8f55af4b74bdb2c8eb821a02d3059
This commit is contained in:
Yaowu Xu 2013-08-29 10:26:52 -07:00
parent b71807082c
commit aaa7b44460
1 changed files with 2 additions and 2 deletions
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4
vp9/encoder/vp9_rdopt.c
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@ -1247,7 +1247,7 @@ static int64_t rd_pick_intra_sby_mode(VP9_COMP *cpi, MACROBLOCK *x,
}
if (cpi->sf.tx_size_search_method == USE_FULL_RD && this_rd < INT64_MAX) {
for (i = 0; i < TX_MODES; i++) {
for (i = 0; i < TX_MODES && local_tx_cache[i] < INT64_MAX; i++) {
const int64_t adj_rd = this_rd + local_tx_cache[i] -
local_tx_cache[cpi->common.tx_mode];
if (adj_rd < tx_cache[i]) {
@ -3816,7 +3816,7 @@ int64_t vp9_rd_pick_inter_mode_sb(VP9_COMP *cpi, MACROBLOCK *x,
tx_cache[ALLOW_32X32] = tx_cache[ALLOW_16X16];
}
if (!mode_excluded && this_rd != INT64_MAX) {
for (i = 0; i < TX_MODES; i++) {
for (i = 0; i < TX_MODES && tx_cache[i] < INT64_MAX; i++) {
int64_t adj_rd = INT64_MAX;
if (this_mode != I4X4_PRED) {
adj_rd = this_rd + tx_cache[i] - tx_cache[cm->tx_mode];