diff options
| -rw-r--r-- | libavcodec/get_bits.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/libavcodec/get_bits.h b/libavcodec/get_bits.h index 16cfd5e0fd..12770a29a0 100644 --- a/libavcodec/get_bits.h +++ b/libavcodec/get_bits.h @@ -393,6 +393,22 @@ static inline int init_get_bits(GetBitContext *s, const uint8_t *buffer, return ret; } +/** + * Initialize GetBitContext. + * @param buffer bitstream buffer, must be FF_INPUT_BUFFER_PADDING_SIZE bytes + * larger than the actual read bits because some optimized bitstream + * readers read 32 or 64 bit at once and could read over the end + * @param byte_size the size of the buffer in bytes + * @return 0 on success, AVERROR_INVALIDDATA if the buffer_size would overflow. + */ +static inline int init_get_bits8(GetBitContext *s, const uint8_t *buffer, + int byte_size) +{ + if (byte_size > INT_MAX / 8) + return AVERROR_INVALIDDATA; + return init_get_bits(s, buffer, byte_size * 8); +} + static inline void align_get_bits(GetBitContext *s) { int n = -get_bits_count(s) & 7; |