shithub: opus

Info  •  Files  •  Log  •  Branches

Fixes rare overflow in intra_decision()

--- a/libcelt/quant_bands.c

+++ b/libcelt/quant_bands.c

@@ -74,11 +74,11 @@

    {

       for (i=start;i<end;i++)

       {

-         celt_word16 d = SUB16(eBands[i+c*len], oldEBands[i+c*len]);

+         celt_word16 d = SHR16(SUB16(eBands[i+c*len], oldEBands[i+c*len]),1);

          dist = MAC16_16(dist, d,d);

       }

    }

-   return SHR32(dist,2*DB_SHIFT) > 2*C*(end-start);

+   return SHR32(dist,2*DB_SHIFT-2) > 2*C*(end-start);

 }

 #ifndef STATIC_MODES