📄 csos2_c.mht

📁 常用的DSP算法集锦

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Date: Wed, 27 Sep 2006 22:39:46 +0800
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<BODY><PRE>/* csos2.c - circular buffer implementation of a single SOS =
*/

void wrap2();

double csos2(a, b, w, q, x)
double *a, *b, *w, x;                   /* \(a,b,w\) are 3-dimensional =
arrays */
int *q;                                 /* \(q\) is circular offset =
relative to \(w\) */
{
       double y;

       w[*q] =3D x - a[1] * w[(*q+1)%3] - a[2] * w[(*q+2)%3];

       y =3D b[0] * w[*q] + b[1] * w[(*q+1)%3] + b[2] * w[(*q+2)%3];

       (*q)--; =20
       wrap2(2, q);

       return y;
}
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