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 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 67 extern "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