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| author | Vitor Sessak <vitor1001@gmail.com> | 2009-11-24 16:58:50 +0000 |
|---|---|---|
| committer | Vitor Sessak <vitor1001@gmail.com> | 2009-11-24 16:58:50 +0000 |
| commit | 691a4232ee04aea207d2c4913a645e2ecbf545da (patch) | |
| tree | a1f3cd77ed36c018e2092b81f4d8e3ec7632313a /libavcodec/lsp.c | |
| parent | d2b34efe225e15bb82793ce166c21af9ab964a5e (diff) | |
| download | ffmpeg-691a4232ee04aea207d2c4913a645e2ecbf545da.tar.gz | |
Make lsp2polyf() function non-static for upcoming usage in SIPR
Originally committed as revision 20602 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/lsp.c')
| -rw-r--r-- | libavcodec/lsp.c | 16 |
1 files changed, 3 insertions, 13 deletions
diff --git a/libavcodec/lsp.c b/libavcodec/lsp.c index 739e1e0bfa..003ffbc634 100644 --- a/libavcodec/lsp.c +++ b/libavcodec/lsp.c @@ -128,17 +128,7 @@ void ff_acelp_lp_decode(int16_t* lp_1st, int16_t* lp_2nd, const int16_t* lsp_2nd ff_acelp_lsp2lpc(lp_2nd, lsp_2nd, lp_order >> 1); } -/** - * Computes the Pa / (1 + z(-1)) or Qa / (1 - z(-1)) coefficients - * needed for LSP to LPC conversion. - * We only need to calculate the 6 first elements of the polynomial. - * - * @param lsp line spectral pairs in cosine domain - * @param f [out] polynomial input/output as a vector - * - * TIA/EIA/IS-733 2.4.3.3.5-1/2 - */ -static void lsp2polyf(const double *lsp, double *f, int lp_half_order) +void ff_lsp2polyf(const double *lsp, double *f, int lp_half_order) { int i, j; @@ -162,8 +152,8 @@ void ff_acelp_lspd2lpc(const double *lsp, float *lpc, int lp_half_order) assert(lp_half_order <= MAX_LP_HALF_ORDER); - lsp2polyf(lsp, pa, lp_half_order); - lsp2polyf(lsp + 1, qa, lp_half_order); + ff_lsp2polyf(lsp, pa, lp_half_order); + ff_lsp2polyf(lsp + 1, qa, lp_half_order); while (lp_half_order--) { double paf = pa[lp_half_order+1] + pa[lp_half_order]; |