void bw_lpc(float gamma, float *lpc_in, float *lpc_out, int order)
void bw_lpc(float gamma, spx_coef_t *lpc_in, spx_coef_t *lpc_out, int order)
void bw_lpc(float gamma, float *lpc_in, float *lpc_out, int order){   int i;   float tmp=1;   for (i=0;i<order+1;i++)   {      lpc_out[i] = tmp * lpc_in[i];      tmp *= gamma;   }}