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get_bits: change the failure condition in init_get_bits

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Too much code relies in having init_get_bits fed with a valid
buffer and set its dimension to 0.

Check for NULL buffer instead.

(cherry picked from commit 4603ec85ed)
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This commit is contained in:
Luca Barbato 2013-01-20 05:10:32 +01:00
parent 8b24e17d09
commit a89acaa0b0
1 changed files with 1 additions and 1 deletions
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2
libavcodec/get_bits.h
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@ -357,7 +357,7 @@ static inline int init_get_bits(GetBitContext *s, const uint8_t *buffer,
int buffer_size;
int ret = 0;
if (bit_size > INT_MAX - 7 || bit_size <= 0) {
if (bit_size > INT_MAX - 7 || bit_size < 0 || !buffer) {
buffer_size = bit_size = 0;
buffer = NULL;
ret = AVERROR_INVALIDDATA;