82 lines
3.0 KiB
C
82 lines
3.0 KiB
C
/* ------------------------------------------------------------------
|
|
* Copyright (C) 1998-2009 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 : weight_a.h
|
|
* Purpose : Spectral expansion of LP coefficients. (order==10)
|
|
* Description : a_exp[i] = a[i] * fac[i-1] ,i=1,10
|
|
*
|
|
*
|
|
********************************************************************************
|
|
*/
|
|
#ifndef weight_a_h
|
|
#define weight_a_h "$Id $"
|
|
|
|
/*
|
|
********************************************************************************
|
|
* INCLUDE FILES
|
|
********************************************************************************
|
|
*/
|
|
#include "typedef.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C"
|
|
{
|
|
#endif
|
|
|
|
/*
|
|
********************************************************************************
|
|
* DEFINITION OF DATA TYPES
|
|
********************************************************************************
|
|
*/
|
|
|
|
/*
|
|
********************************************************************************
|
|
* DECLARATION OF PROTOTYPES
|
|
********************************************************************************
|
|
*/
|
|
void Weight_Ai(
|
|
Word16 a[], /* (i) : a[m+1] LPC coefficients (m=10) */
|
|
const Word16 fac[],/* (i) : Spectral expansion factors. */
|
|
Word16 a_exp[] /* (o) : Spectral expanded LPC coefficients */
|
|
);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|