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

1 files changed, 2 insertions, 16 deletions

diff --git a/libavcodec/amrnbdec.c b/libavcodec/amrnbdec.c
index d3fa7653f8..616be9710e 100644
--- a/libavcodec/amrnbdec.c
+++ b/libavcodec/amrnbdec.c
@@ -222,20 +222,6 @@ static enum Mode unpack_bitstream(AMRContext *p, const uint8_t *buf,
 /// @{
 
 /**
- * Convert an lsf vector into an lsp vector.
- *
- * @param lsf               input lsf vector
- * @param lsp               output lsp vector
- */
-static void lsf2lsp(const float *lsf, double *lsp)
-{
-    int i;
-
-    for (i = 0; i < LP_FILTER_ORDER; i++)
-        lsp[i] = cos(2.0 * M_PI * lsf[i]);
-}
-
-/**
  * Interpolate the LSF vector (used for fixed gain smoothing).
  * The interpolation is done over all four subframes even in MODE_12k2.
  *
@@ -293,7 +279,7 @@ static void lsf2lsp_for_mode12k2(AMRContext *p, double lsp[LP_FILTER_ORDER],
     if (update)
         interpolate_lsf(p->lsf_q, lsf_q);
 
-    lsf2lsp(lsf_q, lsp);
+    ff_acelp_lsf2lspd(lsp, lsf_q, LP_FILTER_ORDER);
 }
 
 /**
@@ -357,7 +343,7 @@ static void lsf2lsp_3(AMRContext *p)
     interpolate_lsf(p->lsf_q, lsf_q);
     memcpy(p->prev_lsf_r, lsf_r, LP_FILTER_ORDER * sizeof(*lsf_r));
 
-    lsf2lsp(lsf_q, p->lsp[3]);
+    ff_acelp_lsf2lspd(p->lsp[3], lsf_q, LP_FILTER_ORDER);
 
     // interpolate LSP vectors at subframes 1, 2 and 3
     for (i = 1; i <= 3; i++)