atrac3: avoid oversized shifting in decode_bytes()
authorXi Wang <xi.wang@gmail.com>
Fri, 15 Mar 2013 10:31:21 +0000 (06:31 -0400)
committerLuca Barbato <lu_zero@gentoo.org>
Fri, 15 Mar 2013 11:51:10 +0000 (12:51 +0100)
commiteba1ff31304e407db3cefd7532108408f364367b
tree74d543d27b3ead36593af0ed2571dea4810cef43
parentc42e2625130204733916e6ffb1a86ccdffe5fe71
atrac3: avoid oversized shifting in decode_bytes()

When `off' is 0, `0x537F6103 << 32' in the following expression invokes
undefined behavior, the result of which is not necessarily 0.

    (0x537F6103 >> (off * 8)) | (0x537F6103 << (32 - (off * 8)))

Avoid oversized shifting.

CC: libav-stable@libav.org
Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
libavcodec/atrac3.c