+
−/*
+
−********************************************************************************
+
−*
+
−*      GSM AMR-NB speech codec   R98   Version 7.6.0   December 12, 2001
+
−*                                R99   Version 3.3.0                
+
−*                                REL-4 Version 4.1.0                
+
−*
+
−********************************************************************************
+
−*
+
−*      File             : spreproc.h
+
−*      Purpose          : Subframe preprocessing
+
−*
+
−********************************************************************************
+
−*/
+
−#ifndef spreproc_h
+
−#define spreproc_h "$Id $"
+
− 
+
−/*
+
−********************************************************************************
+
−*                         INCLUDE FILES
+
−********************************************************************************
+
−*/
+
−#include "tw_amr.h"
+
−#include "typedef.h"
+
−#include "cnst.h"
+
−
+
−/*
+
−********************************************************************************
+
−*                         DECLARATION OF PROTOTYPES
+
−********************************************************************************
+
−*/
+
−int subframePreProc(
+
−    enum Mode mode,            /* i  : coder mode                            */
+
−    const Word16 gamma1[],     /* i  : spectral exp. factor 1                */
+
−    const Word16 gamma1_12k2[],/* i  : spectral exp. factor 1 for EFR        */
+
−    const Word16 gamma2[],     /* i  : spectral exp. factor 2                */
+
−    Word16 *A,                 /* i  : A(z) unquantized for the 4 subframes  */
+
−    Word16 *Aq,                /* i  : A(z)   quantized for the 4 subframes  */
+
−    Word16 *speech,            /* i  : speech segment                        */
+
−    Word16 *mem_err,           /* i  : pointer to error signal               */
+
−    Word16 *mem_w0,            /* i  : memory of weighting filter            */
+
−    Word16 *zero,              /* i  : pointer to zero vector                */
+
−    Word16 ai_zero[],          /* o  : history of weighted synth. filter     */
+
−    Word16 exc[],              /* o  : long term prediction residual         */
+
−    Word16 h1[],               /* o  : impulse response                      */
+
−    Word16 xn[],               /* o  : target vector for pitch search        */
+
−    Word16 res2[],             /* o  : long term prediction residual         */
+
−    Word16 error[]             /* o  : error of LPC synthesis filter         */
+
−);
+
−
+
−#endif