lpc_out[i] = tmp * lpc_in[i]; tmp *= gamma;
lpc_out[i] = MULT16_16_P15(tmp,lpc_in[i]); tmp = MULT16_16_P15(tmp, gamma);
void bw_lpc(spx_word16_t gamma, const spx_coef_t *lpc_in, spx_coef_t *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;   }}