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 26.173 22 ANSI-C code for the Adaptive Multi-Rate - Wideband (AMR-WB) speech codec 23 Available from http://www.3gpp.org 24 25 (C) 2007, 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: noise_gen_amrwb.cpp 35 36 Date: 05/08/2007 37 38 ------------------------------------------------------------------------------ 39 REVISION HISTORY 40 41 42 Description: 43 44 ------------------------------------------------------------------------------ 45 INPUT AND OUTPUT DEFINITIONS 46 47 int16 * seed seed for the random ng 48 49 ------------------------------------------------------------------------------ 50 FUNCTION DESCRIPTION 51 52 Signed 16 bits random generator 53 54 ------------------------------------------------------------------------------ 55 REQUIREMENTS 56 57 58 ------------------------------------------------------------------------------ 59 REFERENCES 60 61 ------------------------------------------------------------------------------ 62 PSEUDO-CODE 63 64 ------------------------------------------------------------------------------ 65 */ 66 67 68 /*---------------------------------------------------------------------------- 69 ; INCLUDES 70 ----------------------------------------------------------------------------*/ 71 72 #include "pv_amr_wb_type_defs.h" 73 #include "pvamrwbdecoder_basic_op.h" 74 #include "pvamrwbdecoder_acelp.h" 75 76 /*---------------------------------------------------------------------------- 77 ; MACROS 78 ; Define module specific macros here 79 ----------------------------------------------------------------------------*/ 80 81 82 /*---------------------------------------------------------------------------- 83 ; DEFINES 84 ; Include all pre-processor statements here. Include conditional 85 ; compile variables also. 86 ----------------------------------------------------------------------------*/ 87 88 /*---------------------------------------------------------------------------- 89 ; LOCAL FUNCTION DEFINITIONS 90 ; Function Prototype declaration 91 ----------------------------------------------------------------------------*/ 92 93 /*---------------------------------------------------------------------------- 94 ; LOCAL STORE/BUFFER/POINTER DEFINITIONS 95 ; Variable declaration - defined here and used outside this module 96 ----------------------------------------------------------------------------*/ 97 98 /*---------------------------------------------------------------------------- 99 ; EXTERNAL FUNCTION REFERENCES 100 ; Declare functions defined elsewhere and referenced in this module 101 ----------------------------------------------------------------------------*/ 102 103 /*---------------------------------------------------------------------------- 104 ; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES 105 ; Declare variables used in this module but defined elsewhere 106 ----------------------------------------------------------------------------*/ 107 108 /*---------------------------------------------------------------------------- 109 ; FUNCTION CODE 110 ----------------------------------------------------------------------------*/ 111 112 int16 noise_gen_amrwb(int16 * seed) 113 { 114 /* int16 seed = 21845; */ 115 *seed = (int16)fxp_mac_16by16(*seed, 31821, 13849L); 116 117 return (*seed); 118 } 119
