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/src/include/post_pro.h 35 36 Date: 02/04/2002 37 38 ------------------------------------------------------------------------------ 39 REVISION HISTORY 40 41 Description: Replaced "int" and/or "char" with OSCL defined types. 42 43 Description: Moved _cplusplus #ifdef after Include section. 44 45 Description: 46 47 ------------------------------------------------------------------------------ 48 INCLUDE DESCRIPTION 49 50 File : post_pro.h 51 Purpose : Postprocessing of output speech. 52 53 - 2nd order high pass filtering with cut 54 off frequency at 60 Hz. 55 - Multiplication of output by two. 56 ------------------------------------------------------------------------------ 57 */ 58 59 #ifndef _POST_PRO_H_ 60 #define _POST_PRO_H_ 61 #define post_pro_h "$Id $" 62 63 /*---------------------------------------------------------------------------- 64 ; INCLUDES 65 ----------------------------------------------------------------------------*/ 66 #include "typedef.h" 67 68 /*--------------------------------------------------------------------------*/ 69 #ifdef __cplusplus 70 extern "C" 71 { 72 #endif 73 74 /*---------------------------------------------------------------------------- 75 ; MACROS 76 ; [Define module specific macros here] 77 ----------------------------------------------------------------------------*/ 78 79 /*---------------------------------------------------------------------------- 80 ; DEFINES 81 ; [Include all pre-processor statements here.] 82 ----------------------------------------------------------------------------*/ 83 84 /*---------------------------------------------------------------------------- 85 ; EXTERNAL VARIABLES REFERENCES 86 ; [Declare variables used in this module but defined elsewhere] 87 ----------------------------------------------------------------------------*/ 88 89 /*---------------------------------------------------------------------------- 90 ; SIMPLE TYPEDEF'S 91 ----------------------------------------------------------------------------*/ 92 93 /*---------------------------------------------------------------------------- 94 ; ENUMERATED TYPEDEF'S 95 ----------------------------------------------------------------------------*/ 96 97 /*---------------------------------------------------------------------------- 98 ; STRUCTURES TYPEDEF'S 99 ----------------------------------------------------------------------------*/ 100 typedef struct 101 { 102 Word16 y2_hi; 103 Word16 y2_lo; 104 Word16 y1_hi; 105 Word16 y1_lo; 106 Word16 x0; 107 Word16 x1; 108 } Post_ProcessState; 109 110 /*---------------------------------------------------------------------------- 111 ; GLOBAL FUNCTION DEFINITIONS 112 ; [List function prototypes here] 113 ----------------------------------------------------------------------------*/ 114 115 Word16 Post_Process_reset(Post_ProcessState *st); 116 /* reset of Post processing state (i.e. set state memory to zero) 117 returns 0 on success 118 */ 119 void Post_Process_exit(Post_ProcessState **st); 120 /* de-initialize Post processing state (i.e. free status struct) 121 stores NULL in *st 122 */ 123 124 void Post_Process( 125 Post_ProcessState *st, /* i/o : post process state */ 126 Word16 signal[], /* i/o : signal */ 127 Word16 lg, /* i : lenght of signal */ 128 Flag *pOverflow 129 ); 130 131 #ifdef __cplusplus 132 } 133 #endif 134 135 #endif /* _POST_PRO_H_ */ 136 137 138 139 140 141