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 Filename: /audio/gsm_amr/c/src/log2_tbl.c 32 33 ------------------------------------------------------------------------------ 34 REVISION HISTORY 35 36 Description: Added #ifdef __cplusplus and removed "extern" from table 37 definition. 38 39 Description: Put "extern" back. 40 41 Who: Date: 42 Description: 43 44 ------------------------------------------------------------------------------ 45 MODULE DESCRIPTION 46 47 This file contains the declaration for log2_tbl[] used by the log2() and 48 log2_norm() function. 49 50 ------------------------------------------------------------------------------ 51 */ 52 53 /*---------------------------------------------------------------------------- 54 ; INCLUDES 55 ----------------------------------------------------------------------------*/ 56 #include "typedef.h" 57 #include "log2_norm.h" 58 59 /*--------------------------------------------------------------------------*/ 60 #ifdef __cplusplus 61 extern "C" 62 { 63 #endif 64 65 /*---------------------------------------------------------------------------- 66 ; MACROS 67 ; [Define module specific macros here] 68 ----------------------------------------------------------------------------*/ 69 70 /*---------------------------------------------------------------------------- 71 ; DEFINES 72 ; [Include all pre-processor statements here. Include conditional 73 ; compile variables also.] 74 ----------------------------------------------------------------------------*/ 75 76 /*---------------------------------------------------------------------------- 77 ; LOCAL FUNCTION DEFINITIONS 78 ; [List function prototypes here] 79 ----------------------------------------------------------------------------*/ 80 81 /*---------------------------------------------------------------------------- 82 ; LOCAL VARIABLE DEFINITIONS 83 ; [Variable declaration - defined here and used outside this module] 84 ----------------------------------------------------------------------------*/ 85 86 const Word16 log2_tbl[33] = 87 { 88 0, 1455, 2866, 4236, 5568, 6863, 8124, 9352, 10549, 11716, 89 12855, 13967, 15054, 16117, 17156, 18172, 19167, 20142, 21097, 22033, 90 22951, 23852, 24735, 25603, 26455, 27291, 28113, 28922, 29716, 30497, 91 31266, 32023, 32767 92 }; 93 94 /*--------------------------------------------------------------------------*/ 95 #ifdef __cplusplus 96 } 97 #endif 98 99 /* 100 ------------------------------------------------------------------------------ 101 FUNCTION NAME: 102 ------------------------------------------------------------------------------ 103 INPUT AND OUTPUT DEFINITIONS 104 105 Inputs: 106 None 107 108 Outputs: 109 None 110 111 Returns: 112 None 113 114 Global Variables Used: 115 None 116 117 Local Variables Needed: 118 None 119 120 ------------------------------------------------------------------------------ 121 FUNCTION DESCRIPTION 122 123 None 124 125 ------------------------------------------------------------------------------ 126 REQUIREMENTS 127 128 None 129 130 ------------------------------------------------------------------------------ 131 REFERENCES 132 133 [1] log2.tab, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 134 135 ------------------------------------------------------------------------------ 136 PSEUDO-CODE 137 138 139 ------------------------------------------------------------------------------ 140 RESOURCES USED [optional] 141 142 When the code is written for a specific target processor the 143 the resources used should be documented below. 144 145 HEAP MEMORY USED: x bytes 146 147 STACK MEMORY USED: x bytes 148 149 CLOCK CYCLES: (cycle count equation for this function) + (variable 150 used to represent cycle count for each subroutine 151 called) 152 where: (cycle count variable) = cycle count for [subroutine 153 name] 154 155 ------------------------------------------------------------------------------ 156 CAUTION [optional] 157 [State any special notes, constraints or cautions for users of this function] 158 159 ------------------------------------------------------------------------------ 160 */ 161 162 /*---------------------------------------------------------------------------- 163 ; FUNCTION CODE 164 ----------------------------------------------------------------------------*/ 165 166
