shithub: opus

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Fixed intra-frame prediction (added sign)

--- a/libcelt/vq.c

+++ b/libcelt/vq.c

@@ -224,7 +224,8 @@

 {

    int i,j;

    int best=0;

-   float best_score=-1e15;

+   float best_score=0;

+   float s = 1;

    float E;

    for (i=0;i<N0*B-N;i+=B)

    {

@@ -236,18 +237,22 @@

          xy += x[j]*Y[i+j];

          yy += Y[i+j]*Y[i+j];

       }

-      score = xy*xy/(.1*yy);

+      score = xy*xy/(.001+yy);

       if (score > best_score)

       {

          best_score = score;

          best = i;

+         if (xy>0)

+            s = 1;

+         else

+            s = -1;

       }

    }

-   //printf ("%d\n", best);

+   //printf ("%d %f\n", best, best_score);

    E = 1e-10;

    for (j=0;j<N;j++)

    {

-      x[j] = Y[best+j];

+      x[j] = s*Y[best+j];

       E += x[j]*x[j];

    }

    E = 1/sqrt(E);