LPCdecode.h

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 /******************************************************************

 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