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      1 /* ------------------------------------------------------------------
      2  * Copyright (C) 1998-2009 PacketVideo
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
     13  * express or implied.
     14  * See the License for the specific language governing permissions
     15  * and limitations under the License.
     16  * -------------------------------------------------------------------
     17  */
     18 /****************************************************************************************
     19 Portions of this file are derived from the following 3GPP standard:
     20 
     21     3GPP TS 26.073
     22     ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec
     23     Available from http://www.3gpp.org
     24 
     25 (C) 2004, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC)
     26 Permission to distribute, modify and use this file under the standard license
     27 terms listed above has been obtained from the copyright holder.
     28 ****************************************************************************************/
     29 /*
     30 ------------------------------------------------------------------------------
     31 
     32 
     33 
     34  Filename: /audio/gsm_amr/c/src/include/enc_lag3.h
     35 
     36      Date: 01/29/2002
     37 
     38 ------------------------------------------------------------------------------
     39  REVISION HISTORY
     40 
     41  Description: Moved _cplusplus #ifdef after Include section.
     42 
     43  Description:
     44 
     45 ------------------------------------------------------------------------------
     46  INCLUDE DESCRIPTION
     47 
     48       File             : enc_lag3.h
     49       Purpose          : Encoding of fractional pitch lag with 1/3 resolution.
     50 
     51 ------------------------------------------------------------------------------
     52 */
     53 
     54 #ifndef _ENC_LAG3_H_
     55 #define _ENC_LAG3_H_
     56 #define enc_lag3_h "$Id $"
     57 
     58 /*----------------------------------------------------------------------------
     59 ; INCLUDES
     60 ----------------------------------------------------------------------------*/
     61 #include "typedef.h"
     62 
     63 /*--------------------------------------------------------------------------*/
     64 #ifdef __cplusplus
     65 extern "C"
     66 {
     67 #endif
     68 
     69     /*----------------------------------------------------------------------------
     70     ; MACROS
     71     ; [Define module specific macros here]
     72     ----------------------------------------------------------------------------*/
     73 
     74     /*----------------------------------------------------------------------------
     75     ; DEFINES
     76     ; [Include all pre-processor statements here.]
     77     ----------------------------------------------------------------------------*/
     78 
     79     /*----------------------------------------------------------------------------
     80     ; EXTERNAL VARIABLES REFERENCES
     81     ; [Declare variables used in this module but defined elsewhere]
     82     ----------------------------------------------------------------------------*/
     83 
     84     /*----------------------------------------------------------------------------
     85     ; SIMPLE TYPEDEF'S
     86     ----------------------------------------------------------------------------*/
     87 
     88     /*----------------------------------------------------------------------------
     89     ; ENUMERATED TYPEDEF'S
     90     ----------------------------------------------------------------------------*/
     91 
     92     /*----------------------------------------------------------------------------
     93     ; STRUCTURES TYPEDEF'S
     94     ----------------------------------------------------------------------------*/
     95     typedef struct
     96     {
     97         Word16 past_gain;
     98     } agcState;
     99 
    100     /*----------------------------------------------------------------------------
    101     ; GLOBAL FUNCTION DEFINITIONS
    102     ; [List function prototypes here]
    103     ----------------------------------------------------------------------------*/
    104     Word16
    105     Enc_lag3(                /* o  : Return index of encoding     */
    106         Word16 T0,           /* i  : Pitch delay                          */
    107         Word16 T0_frac,      /* i  : Fractional pitch delay               */
    108         Word16 T0_prev,      /* i  : Integer pitch delay of last subframe */
    109         Word16 T0_min,       /* i  : minimum of search range              */
    110         Word16 T0_max,       /* i  : maximum of search range              */
    111         Word16 delta_flag,   /* i  : Flag for 1st (or 3rd) subframe       */
    112         Word16 flag4,        /* i  : Flag for encoding with 4 bits        */
    113         Flag   *pOverflow
    114     );
    115 
    116 
    117 
    118 
    119 #ifdef __cplusplus
    120 }
    121 #endif
    122 
    123 #endif  /* _ENC_LAG3_H_ */
    124 
    125 
    126