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 *      GSM AMR-NB speech codec   R98   Version 7.5.0   March 2, 2001
33 *                                R99   Version 3.2.0
34 *                                REL-4 Version 4.0.0
35 *
36 ********************************************************************************
37 *
38 *      File             : weight_a.h
39 *      Purpose          : Spectral expansion of LP coefficients.  (order==10)
40 *      Description      : a_exp[i] = a[i] * fac[i-1]    ,i=1,10
41 *
42 *
43 ********************************************************************************
44 */
45 #ifndef weight_a_h
46 #define weight_a_h "$Id $"
47 
48 /*
49 ********************************************************************************
50 *                         INCLUDE FILES
51 ********************************************************************************
52 */
53 #include "typedef.h"
54 
55 #ifdef __cplusplus
56 extern "C"
57 {
58 #endif
59 
60     /*
61     ********************************************************************************
62     *                         DEFINITION OF DATA TYPES
63     ********************************************************************************
64     */
65 
66     /*
67     ********************************************************************************
68     *                         DECLARATION OF PROTOTYPES
69     ********************************************************************************
70     */
71     void Weight_Ai(
72         Word16 a[],        /* (i)  : a[m+1]  LPC coefficients   (m=10)          */
73         const Word16 fac[],/* (i)  : Spectral expansion factors.                */
74         Word16 a_exp[]     /* (o)  : Spectral expanded LPC coefficients         */
75     );
76 
77 #ifdef __cplusplus
78 }
79 #endif
80 
81 #endif
82