+
−/*
+
−********************************************************************************
+
−*
+
−*      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             : qua_gain.h
+
−*      Purpose          : Quantization of pitch and codebook gains.
+
−*
+
−********************************************************************************
+
−*/
+
−#ifndef qua_gain_h
+
−#define qua_gain_h "$Id $"
+
− 
+
−/*
+
−********************************************************************************
+
−*                         INCLUDE FILES
+
−********************************************************************************
+
−*/
+
−#include "tw_amr.h"
+
−#include "typedef.h"
+
−
+
−/*
+
−********************************************************************************
+
−*                         DECLARATION OF PROTOTYPES
+
−********************************************************************************
+
−*/
+
−/*************************************************************************
+
− *
+
− * FUNCTION:  Qua_gain()
+
− *
+
− * PURPOSE: Quantization of pitch and codebook gains.
+
− *          (using predicted codebook gain)
+
− *
+
− *************************************************************************/
+
−Word16
+
−Qua_gain(                   /* o  : index of quantization.                 */   
+
−    enum Mode mode,         /* i  : AMR mode                               */
+
−    Word16 exp_gcode0,      /* i  : predicted CB gain (exponent),      Q0  */
+
−    Word16 frac_gcode0,     /* i  : predicted CB gain (fraction),      Q15 */
+
−    Word16 frac_coeff[],    /* i  : energy coeff. (5), fraction part,  Q15 */
+
−    Word16 exp_coeff[],     /* i  : energy coeff. (5), exponent part,  Q0  */
+
−                            /*      (frac_coeff and exp_coeff computed in  */
+
−                            /*       calc_filt_energies())                 */
+
−    Word16 gp_limit,        /* i  : pitch gain limit                       */
+
−    Word16 *gain_pit,       /* o  : Pitch gain,                        Q14 */
+
−    Word16 *gain_cod,       /* o  : Code gain,                         Q1  */
+
−    Word16 *qua_ener_MR122, /* o  : quantized energy error,            Q10 */
+
−                            /*      (for MR122 MA predictor update)        */
+
−    Word16 *qua_ener        /* o  : quantized energy error,            Q10 */
+
−                            /*      (for other MA predictor update)        */
+
−);
+
−#endif