Ganesh Ajjanagadde 979572365f avcodec/ac3enc: fix undefined negative left shift ...

This should fix the undefined behavior reported in:
https://trac.ffmpeg.org/ticket/4727.

I can reproduce this at runtime: simply stick in an abort call in
asym_quant to check if c < 0 and run FATE. I don't know ac3 so I can't
confirm if negative coefficients are intentional, but at the moment they
clearly are according to FATE.

This resolves the undefined behavior. Tested with FATE.

Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

2015-10-10 14:43:22 +02:00

85 KiB

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