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avformat/utils: Check bps before using it in a shift in ff_get_pcm_codec_id()

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Fixes undefined shift
Fixes: usan_shift

Found-by: Thomas Guilbert <tguilbert@google.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2016-05-11 00:00:52 +02:00
parent 8efaee3710
commit ea791c080d
1 changed files with 3 additions and 0 deletions
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3
libavformat/utils.c
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@ -2955,6 +2955,9 @@ 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) enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags)
{ {
if (bps > 64U)
return AV_CODEC_ID_NONE;
if (flt) { if (flt) {
switch (bps) { switch (bps) {
case 32: case 32: