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Defining merge_stereo() when S==-M or S==M

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This commit is contained in:
Jean-Marc Valin 2011-01-21 18:41:48 -05:00
parent 6bdc53b86f
commit 620e716b76
1 changed files with 6 additions and 4 deletions
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10
libcelt/bands.c
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@ -346,10 +346,12 @@ static void stereo_merge(celt_norm *X, celt_norm *Y, celt_word16 mid, int N)
mid2 = SHR32(mid, 1); mid2 = SHR32(mid, 1);
El = MULT16_16(mid2, mid2) + side - 2*xp; El = MULT16_16(mid2, mid2) + side - 2*xp;
Er = MULT16_16(mid2, mid2) + side + 2*xp; Er = MULT16_16(mid2, mid2) + side + 2*xp;
if (Er < EPSILON) if (Er < QCONST32(6e-4f, 28) || El < QCONST32(6e-4f, 28))
Er = EPSILON; {
if (El < EPSILON) for (j=0;j<N;j++)
El = EPSILON; Y[j] = X[j];
return;
}
#ifdef FIXED_POINT #ifdef FIXED_POINT
kl = celt_ilog2(El)>>1; kl = celt_ilog2(El)>>1;