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| author | Koen Vos <koenvos@users.noreply.github.com> | 2016-05-31 16:18:21 +0300 |
|---|---|---|
| committer | Jean-Marc Valin <jmvalin@jmvalin.ca> | 2016-07-08 21:13:58 +0300 |
| commit | d9c6c11f2443e11165eecb26d06b1eee19ab6a54 (patch) | |
| tree | d4650d2f4e8a4e41e5a46dbf16125db58b402491 | |
| parent | a2d70814c4108ffd998adaef0e6a4f54b7c1714d (diff) | |
fix potential overflow
| -rw-r--r-- | silk/sum_sqr_shift.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/silk/sum_sqr_shift.c b/silk/sum_sqr_shift.c index e387391a..43c6b5aa 100644 --- a/silk/sum_sqr_shift.c +++ b/silk/sum_sqr_shift.c @@ -70,6 +70,11 @@ void silk_sum_sqr_shift( /* One sample left to process */ nrg_tmp = silk_SMULBB( x[ i ], x[ i ] ); nrg = (opus_int32)silk_ADD_RSHIFT_uint( nrg, nrg_tmp, shft ); + if( nrg < 0 ) { + /* Scale down */ + nrg = (opus_int32)silk_RSHIFT_uint( (opus_uint32)nrg, 1 ); + shft++; + } } /* Make sure to have at least 10% headroom */ |