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2010 Jun 07
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void inverse_mdct_slow(float *buffer, int n)
{
=A0=A0 int i,j;
=A0=A0 int n2 =3D n >> 1;
=A0=A0 float *x =3D (float *) malloc(sizeof(*x) * n2);
=A0=A0 memcpy(x, buffer, sizeof(*x) * n2);
=A0=A0 for (i=3D0; i < n; ++i) {
=A0=A0=A0=A0=A0 float acc =3D 0;
=A0=A0=A0=A0=A0 for (j=3D0; j < n2; ++j)
=A0=A0=A0=A0=A0=A0=A0=A0 // formula from paper:
=A0=A0=A0=A0=A0=A0=A0=A0 //acc +=3D n/4.0f * x[j] * (float) cos(M_PI / 2 / =
n * (2 * i + 1 + n/2.0)*(2*j+1))...