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fix underflow for very short bitstreams

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+ hardened the asserts

Change-Id: Ie798ef2f9d848c131f6f84a35ea28ef254822d1e
This commit is contained in:
Pascal Massimino
2012-07-09 16:00:37 -07:00
parent 7e622984bb
commit 48b39eb17a
2 changed files with 12 additions and 8 deletions
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2
src/dec/vp8l.c
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@ -159,7 +159,7 @@ static int ReadSymbolUnsafe(const HuffmanTree* tree, VP8LBitReader* const br) {
static WEBP_INLINE int ReadSymbol(const HuffmanTree* tree,
VP8LBitReader* const br) {
const int read_safe = (br->pos_ > br->len_ - 8);
const int read_safe = (br->pos_ + 8 > br->len_);
if (!read_safe) {
return ReadSymbolUnsafe(tree, br);
} else {