d2_11pf.h

实现3GPP的GSM中AMR语音的CODECS。

/* ------------------------------------------------------------------
 * Copyright (C) 2008 PacketVideo
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 * -------------------------------------------------------------------
 */
/****************************************************************************************
Portions of this file are derived from the following 3GPP standard:

    3GPP TS 26.073
    ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec
    Available from http://www.3gpp.org

(C) 2004, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC)
Permission to distribute, modify and use this file under the standard license
terms listed above has been obtained from the copyright holder.
****************************************************************************************/
/*
********************************************************************************
*
*      GSM AMR-NB speech codec   R98   Version 7.5.0   March 2, 2001
*                                R99   Version 3.2.0
*                                REL-4 Version 4.0.0
*
********************************************************************************
*
*      File             : d2_11pf.h
*      Purpose          : Algebraic codebook decoder
*
********************************************************************************
*/
#ifndef d2_11pf_h
#define d2_11pf_h "$Id $"

/*
********************************************************************************
*                         INCLUDE FILES
********************************************************************************
*/
#include "typedef.h"

#ifdef __cplusplus
extern "C"
{
#endif

    /*
    ********************************************************************************
    *                         LOCAL VARIABLES AND TABLES
    ********************************************************************************
    */

    /*
    ********************************************************************************
    *                         DEFINITION OF DATA TYPES
    ********************************************************************************
    */

    /*
    ********************************************************************************
    *                         DECLARATION OF PROTOTYPES
    ********************************************************************************
    */
    /*************************************************************************
     *
     *  FUNCTION:  decode_2i40_11bits (decod_ACELP())
     *
     *  PURPOSE:   Algebraic codebook decoder for 2 pulses coded with 11 bits
     *
     *************************************************************************/

    void decode_2i40_11bits(
        Word16 sign,   /* i : signs of 2 pulses.                       */
        Word16 index,  /* i : Positions of the 2 pulses.               */
        Word16 cod[]   /* o : algebraic (fixed) codebook excitation    */
    );

#ifdef __cplusplus
}
#endif

#endif