7 #define M_PI 3.14159265358979323846
20 float lanc(float, float);
21 float hann(float, float);
23 int clamp(int, int, int);
25 void lopass(vc *, vc *, int, int);
26 void hipass(vc *, vc *, int, int);
28 void prepare_lanc_kernels();
29 int *select_lanc_kernel(float);
30 void free_lanc_kernels();
32 vc interp(vc *, int, float);