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/****************************************************************************************
19Portions 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)
26Permission to distribute, modify and use this file under the standard license
27terms listed above has been obtained from the copyright holder.
28****************************************************************************************/
29/*
30------------------------------------------------------------------------------
31
32
33
34 Filename: /audio/gsm_amr/c/include/autocorr.h
35
36     Date: 01/23/2002
37
38------------------------------------------------------------------------------
39 REVISION HISTORY
40
41 Description: Moved _cplusplus #ifdef after Include section.
42
43 Description:
44
45------------------------------------------------------------------------------
46 INCLUDE DESCRIPTION
47
48 This file contains all the constant definitions and prototype definitions
49 needed by the autocorr function.
50
51------------------------------------------------------------------------------
52*/
53
54/*----------------------------------------------------------------------------
55; CONTINUE ONLY IF NOT ALREADY DEFINED
56----------------------------------------------------------------------------*/
57#ifndef autocorr_h
58#define autocorr_h "$Id $"
59
60/*----------------------------------------------------------------------------
61; INCLUDES
62----------------------------------------------------------------------------*/
63#include "typedef.h"
64
65/*--------------------------------------------------------------------------*/
66#ifdef __cplusplus
67extern "C"
68{
69#endif
70
71    /*----------------------------------------------------------------------------
72    ; MACROS
73    ; Define module specific macros here
74    ----------------------------------------------------------------------------*/
75
76    /*----------------------------------------------------------------------------
77    ; DEFINES
78    ; Include all pre-processor statements here.
79    ----------------------------------------------------------------------------*/
80
81    /*----------------------------------------------------------------------------
82    ; EXTERNAL VARIABLES REFERENCES
83    ; Declare variables used in this module but defined elsewhere
84    ----------------------------------------------------------------------------*/
85
86    /*----------------------------------------------------------------------------
87    ; SIMPLE TYPEDEF'S
88    ----------------------------------------------------------------------------*/
89
90    /*----------------------------------------------------------------------------
91    ; ENUMERATED TYPEDEF'S
92    ----------------------------------------------------------------------------*/
93
94    /*----------------------------------------------------------------------------
95    ; STRUCTURES TYPEDEF'S
96    ----------------------------------------------------------------------------*/
97
98    /*----------------------------------------------------------------------------
99    ; GLOBAL FUNCTION DEFINITIONS
100    ; Function Prototype declaration
101    ----------------------------------------------------------------------------*/
102    Word16 Autocorr(
103        Word16 x[],            /* (i)    : Input signal (L_WINDOW)            */
104        Word16 m,              /* (i)    : LPC order                          */
105        Word16 r_h[],          /* (o)    : Autocorrelations  (msb)            */
106        Word16 r_l[],          /* (o)    : Autocorrelations  (lsb)            */
107        const Word16 wind[],   /* (i)    : window for LPC analysis (L_WINDOW) */
108        Flag  *pOverflow       /* (o)    : indicates overflow                 */
109    );
110
111    /*----------------------------------------------------------------------------
112    ; END
113    ----------------------------------------------------------------------------*/
114#ifdef __cplusplus
115}
116#endif
117
118#endif /* _AUTO_CORR_H_ */
119