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

       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
