106 static void lsp2poly(int* f, const int16_t* lsp, int lp_half_order)  in lsp2poly()  argument
113     for(i=2; i<=lp_half_order; i++)  in lsp2poly()
123 void ff_acelp_lsp2lpc(int16_t* lp, const int16_t* lsp, int lp_half_order)  in ff_acelp_lsp2lpc()  argument
129     lsp2poly(f1, lsp  , lp_half_order);  in ff_acelp_lsp2lpc()
130     lsp2poly(f2, lsp+1, lp_half_order);  in ff_acelp_lsp2lpc()
134     for(i=1; i<lp_half_order+1; i++)  in ff_acelp_lsp2lpc()
141         lp[(lp_half_order << 1) + 1 - i] = (ff1 - ff2) >> 11; // divide by 2 and (3.22) -> (3.12)  in ff_acelp_lsp2lpc()
147     int lp_half_order = lp_order >> 1;  in ff_amrwb_lsp2lpc()  local
155     ff_lsp2polyf(lsp    , pa, lp_half_order    );  in ff_amrwb_lsp2lpc()
156     ff_lsp2polyf(lsp + 1, qa, lp_half_order - 1);  in ff_amrwb_lsp2lpc()
158     for (i = 1, j = lp_order - 1; i < lp_half_order; i++, j--) {  in ff_amrwb_lsp2lpc()
165     lp[lp_half_order - 1] = (1.0 + lsp[lp_order - 1]) *  in ff_amrwb_lsp2lpc()
166         pa[lp_half_order] * 0.5;  in ff_amrwb_lsp2lpc()
191 void ff_lsp2polyf(const double *lsp, double *f, int lp_half_order)  in ff_lsp2polyf()  argument
198     for(i=2; i<=lp_half_order; i++)  in ff_lsp2polyf()
209 void ff_acelp_lspd2lpc(const double *lsp, float *lpc, int lp_half_order)  in ff_acelp_lspd2lpc()  argument
212     float *lpc2 = lpc + (lp_half_order << 1) - 1;  in ff_acelp_lspd2lpc()
214     av_assert2(lp_half_order <= MAX_LP_HALF_ORDER);  in ff_acelp_lspd2lpc()
216     ff_lsp2polyf(lsp,     pa, lp_half_order);  in ff_acelp_lspd2lpc()
217     ff_lsp2polyf(lsp + 1, qa, lp_half_order);  in ff_acelp_lspd2lpc()
219     while (lp_half_order--) {  in ff_acelp_lspd2lpc()
220         double paf = pa[lp_half_order+1] + pa[lp_half_order];  in ff_acelp_lspd2lpc()
221         double qaf = qa[lp_half_order+1] - qa[lp_half_order];  in ff_acelp_lspd2lpc()
223         lpc [ lp_half_order] = 0.5*(paf+qaf);  in ff_acelp_lspd2lpc()
224         lpc2[-lp_half_order] = 0.5*(paf-qaf);  in ff_acelp_lspd2lpc()