avformat/utils: Check negative bps before shifting in ff_get_pcm_codec_id()

Fixes: undefined shift.

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 2875745d35)

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Chris Cunningham 2016-05-17 11:28:32 -07:00 committed by Michael Niedermayer
parent 6d560d4a0b
commit 695dc70aeb

View File

@ -2650,7 +2650,7 @@ enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags)
{
if (bps > 64U)
if (bps <= 0 || bps > 64)
return AV_CODEC_ID_NONE;
if (flt) {