shithub: opus

Info  •  Files  •  Log  •  Branches

Renormalize in anti-collapse only when needed

--- a/libcelt/bands.c

+++ b/libcelt/bands.c

@@ -251,6 +251,7 @@

          celt_word16 prev2;

          celt_word16 Ediff;

          celt_word16 r;

+         int renormalize=0;

          prev1 = prev1logE[c*m->nbEBands+i];

          prev2 = prev2logE[c*m->nbEBands+i];

          if (C<CC)

@@ -291,10 +292,12 @@

                   seed = lcg_rand(seed);

                   X[(j<<LM)+k] = (seed&0x8000 ? r : -r);

                }

+               renormalize = 1;

             }

          }

          /* We just added some energy, so we need to renormalise */

-         renormalise_vector(X, N0<<LM, Q15ONE);

+         if (renormalize)

+            renormalise_vector(X, N0<<LM, Q15ONE);

       } while (++c<C);

    }