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

    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


