initial bits of ilbc codec mod.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@452 d0543943-73ff-0310-b7d9-9358b9ac24b2
2026-07-24 05:02:10 +00:00 · 2006-01-27 00:48:15 +00:00
parent 3bbfb94a22
commit 954fe31140
54 changed files with 467 additions and 5 deletions
@@ -0,0 +1,44 @@
+   
+   /******************************************************************
+   
+       iLBC Speech Coder ANSI-C Source Code
+   
+       LPC_decode.h     
+   
+       Copyright (C) The Internet Society (2004). 
+       All Rights Reserved.
+   
+   ******************************************************************/
+   
+   #ifndef __iLBC_LPC_DECODE_H
+   #define __iLBC_LPC_DECODE_H
+   
+   void LSFinterpolate2a_dec( 
+   
+   
+       float *a,           /* (o) lpc coefficients for a sub-frame */
+       float *lsf1,    /* (i) first lsf coefficient vector */
+       float *lsf2,    /* (i) second lsf coefficient vector */
+       float coef,         /* (i) interpolation weight */
+       int length          /* (i) length of lsf vectors */
+   );
+         
+   void SimplelsfDEQ( 
+       float *lsfdeq,      /* (o) dequantized lsf coefficients */
+       int *index,         /* (i) quantization index */
+       int lpc_n           /* (i) number of LPCs */
+   );
+   
+   void DecoderInterpolateLSF( 
+       float *syntdenum,   /* (o) synthesis filter coefficients */
+       float *weightdenum, /* (o) weighting denumerator 
+                                  coefficients */
+       float *lsfdeq,      /* (i) dequantized lsf coefficients */
+       int length,         /* (i) length of lsf coefficient vector */
+       iLBC_Dec_Inst_t *iLBCdec_inst 
+                           /* (i) the decoder state structure */
+   );
+   
+   #endif
+   
+