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| author | Marcelo Galvăo Póvoa <marspeoplester@gmail.com> | 2010-09-07 20:44:41 +0000 |
|---|---|---|
| committer | Vitor Sessak <vitor1001@gmail.com> | 2010-09-07 20:44:41 +0000 |
| commit | 1d96cc08652072730e64ecb45df81b608a015a38 (patch) | |
| tree | a685761cce72c9d4acde9a2e08620a7c454ff9a6 /libavcodec/lsp.c | |
| parent | b33451eeacaa31a7b4f15daf3f106763a4093aa0 (diff) | |
| download | ffmpeg-streaming-1d96cc08652072730e64ecb45df81b608a015a38.zip ffmpeg-streaming-1d96cc08652072730e64ecb45df81b608a015a38.tar.gz | |
Move AMRNB lsf2lsp() function to common code for using in future AMRWB decoder.
Patch by Marcelo Galvăo Póvoa
Originally committed as revision 25061 to svn://svn.ffmpeg.org/ffmpeg/trunk
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 7112492..fa71527 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) |
