+
−/*
+
−********************************************************************************
+
−*
+
−*      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             : dec_lag3.h
+
−*      Purpose          : Decoding of fractional pitch lag with 1/3 resolution.
+
−*                         Extract the integer and fraction parts of the pitch lag from
+
−*                         the received adaptive codebook index.
+
−*
+
−********************************************************************************
+
−*/
+
−#ifndef dec_lag3_h
+
−#define dec_lag3_h "$Id $"
+
−
+
−/*
+
−********************************************************************************
+
−*                         INCLUDE FILES
+
−********************************************************************************
+
−*/
+
−#include "typedef.h"
+
−
+
−/*
+
−********************************************************************************
+
−*                         LOCAL VARIABLES AND TABLES
+
−********************************************************************************
+
−*/
+
−
+
−/*
+
−********************************************************************************
+
−*                         DEFINITION OF DATA TYPES
+
−********************************************************************************
+
−*/
+
−
+
−/*
+
−********************************************************************************
+
−*                         DECLARATION OF PROTOTYPES
+
−********************************************************************************
+
−*/
+
−/*************************************************************************
+
− *   FUNCTION:   Dec_lag3
+
− *
+
− *   PURPOSE:  Decoding of fractional pitch lag with 1/3 resolution.
+
− *             Extract the integer and fraction parts of the pitch lag from
+
− *             the received adaptive codebook index.
+
− *
+
− *    See "Enc_lag3.c" for more details about the encoding procedure.
+
− *
+
− *    The fractional lag in 1st and 3rd subframes is encoded with 8 bits
+
− *    while that in 2nd and 4th subframes is relatively encoded with 4, 5
+
− *    and 6 bits depending on the mode.
+
− *
+
− *************************************************************************/
+
−void Dec_lag3(Word16 index,     /* i : received pitch index                 */
+
−              Word16 T0_min,    /* i : minimum of search range              */
+
−              Word16 T0_max,    /* i : maximum of search range              */
+
−              Word16 i_subfr,   /* i : subframe flag                        */
+
−              Word16 T0_prev,   /* i : integer pitch delay of last subframe
+
−                                       used in 2nd and 4th subframes        */
+
−              Word16 * T0,      /* o : integer part of pitch lag            */ 
+
−              Word16 * T0_frac, /* o : fractional part of pitch lag         */
+
−              Word16 flag4      /* i : flag for encoding with 4 bits        */
+
−              );
+
−
+
−#endif