[FFmpeg-devel] [PATCH] Fix av_crc unaligned accesses
Fri Jun 12 04:14:35 CEST 2009
On Fri, 12 Jun 2009, Michael Niedermayer wrote:
> On Thu, Jun 11, 2009 at 06:48:25PM -0400, Jeff Downs wrote:
> > Currently, av_crc() blindly casts a byte buffer to uint32 without regard
> > for alignment requirements. The documentation doesn't state any alignment
> > requirements.
> > This issue causes crashes during decoding on sparc.
> > Attached changes the implementation to compute byte-by-byte until aligned,
> > then proceeds with the 32-bit-based calculations.
> > Alternatively, docs could be added to specify alignment restriction. (I
> > know of at least one decoder that would need to be changed to meet such a
> > requirement)
> > -Jeff
> > crc.c | 6 +++++-
> > 1 file changed, 5 insertions(+), 1 deletion(-)
> > e34d1e23bbc46adb97e54743163cfef4bccc389c crc-align.patch
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