ff_acelp_lsp2lpc  116 libavcodec/lsp.c     ff_acelp_lsp2lpc(lp_1st, lsp_1st, lp_order >> 1);
ff_acelp_lsp2lpc  119 libavcodec/lsp.c     ff_acelp_lsp2lpc(lp_2nd, lsp_2nd, lp_order >> 1);
ff_acelp_lsp2lpc   58 libavcodec/lsp.h void ff_acelp_lsp2lpc(int16_t* lp, const int16_t* lsp, int lp_half_order);