spreproc.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.
****************************************************************************************/
/*
------------------------------------------------------------------------------



 Filename: /audio/gsm_amr/c/include/spreproc.h

     Date: 02/06/2002

------------------------------------------------------------------------------
 REVISION HISTORY

 Description: Placed header file in the proper template format.

 Description:  Replaced "int" and/or "char" with OSCL defined types.

 Description: Moved _cplusplus #ifdef after Include section.

 Description:

------------------------------------------------------------------------------
 INCLUDE DESCRIPTION

 This file contains all the constant definitions and prototype definitions
 needed by the file, spreproc.c

------------------------------------------------------------------------------
*/

/*----------------------------------------------------------------------------
; CONTINUE ONLY IF NOT ALREADY DEFINED
----------------------------------------------------------------------------*/
#ifndef spreproc_h
#define spreproc_h "$Id $"

/*----------------------------------------------------------------------------
; INCLUDES
----------------------------------------------------------------------------*/
#include "cnst.h"
#include "mode.h"
#include "typedef.h"

/*--------------------------------------------------------------------------*/
#ifdef __cplusplus
extern "C"
{
#endif

    /*----------------------------------------------------------------------------
    ; MACROS
    ; Define module specific macros here
    ----------------------------------------------------------------------------*/

    /*----------------------------------------------------------------------------
    ; DEFINES
    ; Include all pre-processor statements here.
    ----------------------------------------------------------------------------*/

    /*----------------------------------------------------------------------------
    ; EXTERNAL VARIABLES REFERENCES
    ; Declare variables used in this module but defined elsewhere
    ----------------------------------------------------------------------------*/

    /*----------------------------------------------------------------------------
    ; SIMPLE TYPEDEF'S
    ----------------------------------------------------------------------------*/

    /*----------------------------------------------------------------------------
    ; ENUMERATED TYPEDEF'S
    ----------------------------------------------------------------------------*/

    /*----------------------------------------------------------------------------
    ; STRUCTURES TYPEDEF'S
    ----------------------------------------------------------------------------*/

    /*----------------------------------------------------------------------------
    ; GLOBAL FUNCTION DEFINITIONS
    ; Function Prototype declaration
    ----------------------------------------------------------------------------*/
    void subframePreProc(
        enum Mode mode,            /* i  : coder mode                            */
        const Word16 gamma1[],     /* i  : spectral exp. factor 1                */
        const Word16 gamma1_12k2[],/* i  : spectral exp. factor 1 for EFR        */
        const Word16 gamma2[],     /* i  : spectral exp. factor 2                */
        Word16 *A,                 /* i  : A(z) unquantized for the 4 subframes  */
        Word16 *Aq,                /* i  : A(z)   quantized for the 4 subframes  */
        Word16 *speech,            /* i  : speech segment                        */
        Word16 *mem_err,           /* i  : pointer to error signal               */
        Word16 *mem_w0,            /* i  : memory of weighting filter            */
        Word16 *zero,              /* i  : pointer to zero vector                */
        Word16 ai_zero[],          /* o  : history of weighted synth. filter     */
        Word16 exc[],              /* o  : long term prediction residual         */
        Word16 h1[],               /* o  : impulse response                      */
        Word16 xn[],               /* o  : target vector for pitch search        */
        Word16 res2[],             /* o  : long term prediction residual         */
        Word16 error[]             /* o  : error of LPC synthesis filter         */
    );

    /*----------------------------------------------------------------------------
    ; END
    ----------------------------------------------------------------------------*/
#ifdef __cplusplus
}
#endif

#endif /* spreproc_h */