commit d501f6143caa7adf6a2782a086f195016d9cf588
author Jean-Marc Valin <Jean-Marc.Valin@csiro.au> Thu Feb 21 12:16:57 2008 +1100
committer Jean-Marc Valin <Jean-Marc.Valin@csiro.au> Thu Feb 21 12:16:57 2008 +1100
tree c512ac358771d108f941ab02313240a54daaedb6
parent 5e2196373f0b65a534069d4fcb46c4a06a9ad96a

Doing intra-frame prediction backwards (and a few comments)

libcelt/vq.c

diff --git a/libcelt/vq.c b/libcelt/vq.c
index 8557d76..8d284f8 100644
--- a/libcelt/vq.c
+++ b/libcelt/vq.c
@@ -367,8 +367,8 @@
       float score;
       for (j=0;j<N;j++)
       {
-         xy += x[j]*Y[i+j];
-         yy += Y[i+j]*Y[i+j];
+         xy += x[j]*Y[i+N-j-1];
+         yy += Y[i+N-j-1]*Y[i+N-j-1];
       }
       score = xy*xy/(.001+yy);
       if (score > best_score)
@@ -397,7 +397,7 @@
    E = 1e-10;
    for (j=0;j<N;j++)
    {
-      P[j] = s*Y[best+j];
+      P[j] = s*Y[best+N-j-1];
       E += P[j]*P[j];
    }
    E = pred_gain/sqrt(E);
@@ -444,7 +444,7 @@
    E = 1e-10;
    for (j=0;j<N;j++)
    {
-      P[j] = s*Y[best+j];
+      P[j] = s*Y[best+N-j-1];
       E += P[j]*P[j];
    }
    E = pred_gain/sqrt(E);