diff options
Diffstat (limited to 'libavcodec/lsp.c')
| -rw-r--r-- | libavcodec/lsp.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/libavcodec/lsp.c b/libavcodec/lsp.c index 7112492001..fa7152737a 100644 --- a/libavcodec/lsp.c +++ b/libavcodec/lsp.c @@ -65,6 +65,14 @@ void ff_acelp_lsf2lsp(int16_t *lsp, const int16_t *lsf, int lp_order) lsp[i] = ff_cos(lsf[i] * 20861 >> 15); // divide by PI and (0,13) -> (0,14) } +void ff_acelp_lsf2lspd(double *lsp, const float *lsf, int lp_order) +{ + int i; + + for(i = 0; i < lp_order; i++) + lsp[i] = cos(2.0 * M_PI * lsf[i]); +} + /** * \brief decodes polynomial coefficients from LSP * \param f [out] decoded polynomial coefficients (-0x20000000 <= (3.22) <= 0x1fffffff) |