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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/ol_ltp.h
     35 
     36      Date: 02/06/2002
     37 
     38 ------------------------------------------------------------------------------
     39  REVISION HISTORY
     40 
     41  Description:  Replaced "int" and/or "char" with OSCL defined types.
     42 
     43  Description: Moved _cplusplus #ifdef after Include section.
     44 
     45  Description:
     46 
     47 ------------------------------------------------------------------------------
     48  INCLUDE DESCRIPTION
     49 
     50        File             : ol_ltp.h
     51        Purpose          : Compute the open loop pitch lag.
     52 
     53 ------------------------------------------------------------------------------
     54 */
     55 
     56 #ifndef OL_LTP_H
     57 #define OL_LTP_H "$Id $"
     58 
     59 /*----------------------------------------------------------------------------
     60 ; INCLUDES
     61 ----------------------------------------------------------------------------*/
     62 #include "typedef.h"
     63 #include "mode.h"
     64 #include "p_ol_wgh.h"
     65 
     66 /*--------------------------------------------------------------------------*/
     67 #ifdef __cplusplus
     68 extern "C"
     69 {
     70 #endif
     71 
     72     /*----------------------------------------------------------------------------
     73     ; MACROS
     74     ; [Define module specific macros here]
     75     ----------------------------------------------------------------------------*/
     76 
     77     /*----------------------------------------------------------------------------
     78     ; DEFINES
     79     ; [Include all pre-processor statements here.]
     80     ----------------------------------------------------------------------------*/
     81 
     82     /*----------------------------------------------------------------------------
     83     ; EXTERNAL VARIABLES REFERENCES
     84     ; [Declare variables used in this module but defined elsewhere]
     85     ----------------------------------------------------------------------------*/
     86 
     87     /*----------------------------------------------------------------------------
     88     ; SIMPLE TYPEDEF'S
     89     ----------------------------------------------------------------------------*/
     90 
     91     /*----------------------------------------------------------------------------
     92     ; ENUMERATED TYPEDEF'S
     93     ----------------------------------------------------------------------------*/
     94 
     95     /*----------------------------------------------------------------------------
     96     ; STRUCTURES TYPEDEF'S
     97     ----------------------------------------------------------------------------*/
     98 
     99 
    100     /*----------------------------------------------------------------------------
    101     ; GLOBAL FUNCTION DEFINITIONS
    102     ; [List function prototypes here]
    103     ----------------------------------------------------------------------------*/
    104     void ol_ltp(
    105         pitchOLWghtState *st, /* i/o : State struct                            */
    106         vadState *vadSt,      /* i/o : VAD state struct                        */
    107         enum Mode mode,       /* i   : coder mode                              */
    108         Word16 wsp[],         /* i   : signal used to compute the OL pitch, Q0 */
    109         /*       uses signal[-pit_max] to signal[-1]     */
    110         Word16 *T_op,         /* o   : open loop pitch lag,                 Q0 */
    111         Word16 old_lags[],    /* i   : history with old stored Cl lags         */
    112         Word16 ol_gain_flg[], /* i   : OL gain flag                            */
    113         Word16 idx,           /* i   : index                                   */
    114         Flag dtx,             /* i   : dtx flag; use dtx=1, do not use dtx=0   */
    115         Flag *pOverflow       /* i/o : overflow Flag                           */
    116     );
    117 
    118 
    119 #ifdef __cplusplus
    120 }
    121 #endif
    122 
    123 #endif  /* _OL_LTP_H_ */
    124 
    125 
    126