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 : pre_proc.h 39 * Purpose : Preprocessing of input speech. 40 * 41 42 Description: Replaced "int" and/or "char" with OSCL defined types. 43 44 ******************************************************************************** 45 */ 46 #ifndef pre_proc_h 47 #define pre_proc_h "$Id $" 48 49 /* 50 ******************************************************************************** 51 * INCLUDE FILES 52 ******************************************************************************** 53 */ 54 #include "typedef.h" 55 56 #ifdef __cplusplus 57 extern "C" 58 { 59 #endif 60 61 /* 62 ******************************************************************************** 63 * LOCAL VARIABLES AND TABLES 64 ******************************************************************************** 65 */ 66 67 /* 68 ******************************************************************************** 69 * DEFINITION OF DATA TYPES 70 ******************************************************************************** 71 */ 72 typedef struct 73 { 74 Word16 y2_hi; 75 Word16 y2_lo; 76 Word16 y1_hi; 77 Word16 y1_lo; 78 Word16 x0; 79 Word16 x1; 80 } Pre_ProcessState; 81 82 /* 83 ******************************************************************************** 84 * DECLARATION OF PROTOTYPES 85 ******************************************************************************** 86 */ 87 88 Word16 Pre_Process_init(Pre_ProcessState **st); 89 /* initialize one instance of the pre processing state. 90 Stores pointer to filter status struct in *st. This pointer has to 91 be passed to Pre_Process in each call. 92 returns 0 on success 93 */ 94 95 Word16 Pre_Process_reset(Pre_ProcessState *st); 96 /* reset of pre processing state (i.e. set state memory to zero) 97 returns 0 on success 98 */ 99 void Pre_Process_exit(Pre_ProcessState **st); 100 /* de-initialize pre processing state (i.e. free status struct) 101 stores NULL in *st 102 */ 103 104 void Pre_Process( 105 Pre_ProcessState *st, 106 Word16 signal[], /* Input/output signal */ 107 Word16 lg /* Lenght of signal */ 108 ); 109 110 #ifdef __cplusplus 111 } 112 #endif 113 114 #endif 115
