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 20 Filename: decode_noise_floorlevels.c 21 22 ------------------------------------------------------------------------------ 23 REVISION HISTORY 24 25 26 Who: Date: MM/DD/YYYY 27 Description: 28 29 ------------------------------------------------------------------------------ 30 INPUT AND OUTPUT DEFINITIONS 31 32 33 34 ------------------------------------------------------------------------------ 35 FUNCTION DESCRIPTION 36 37 38 ------------------------------------------------------------------------------ 39 REQUIREMENTS 40 41 42 ------------------------------------------------------------------------------ 43 REFERENCES 44 45 SC 29 Software Copyright Licencing Disclaimer: 46 47 This software module was originally developed by 48 Coding Technologies 49 50 and edited by 51 - 52 53 in the course of development of the ISO/IEC 13818-7 and ISO/IEC 14496-3 54 standards for reference purposes and its performance may not have been 55 optimized. This software module is an implementation of one or more tools as 56 specified by the ISO/IEC 13818-7 and ISO/IEC 14496-3 standards. 57 ISO/IEC gives users free license to this software module or modifications 58 thereof for use in products claiming conformance to audiovisual and 59 image-coding related ITU Recommendations and/or ISO/IEC International 60 Standards. ISO/IEC gives users the same free license to this software module or 61 modifications thereof for research purposes and further ISO/IEC standardisation. 62 Those intending to use this software module in products are advised that its 63 use may infringe existing patents. ISO/IEC have no liability for use of this 64 software module or modifications thereof. Copyright is not released for 65 products that do not conform to audiovisual and image-coding related ITU 66 Recommendations and/or ISO/IEC International Standards. 67 The original developer retains full right to modify and use the code for its 68 own purpose, assign or donate the code to a third party and to inhibit third 69 parties from using the code for products that do not conform to audiovisual and 70 image-coding related ITU Recommendations and/or ISO/IEC International Standards. 71 This copyright notice must be included in all copies or derivative works. 72 Copyright (c) ISO/IEC 2002. 73 74 ------------------------------------------------------------------------------ 75 PSEUDO-CODE 76 77 ------------------------------------------------------------------------------ 78 */ 79 80 #ifdef AAC_PLUS 81 82 /*---------------------------------------------------------------------------- 83 ; INCLUDES 84 ----------------------------------------------------------------------------*/ 85 #include "decode_noise_floorlevels.h" 86 #include "sbr_constants.h" 87 88 /*---------------------------------------------------------------------------- 89 ; MACROS 90 ; Define module specific macros here 91 ----------------------------------------------------------------------------*/ 92 93 94 /*---------------------------------------------------------------------------- 95 ; DEFINES 96 ; Include all pre-processor statements here. Include conditional 97 ; compile variables also. 98 ----------------------------------------------------------------------------*/ 99 100 /*---------------------------------------------------------------------------- 101 ; LOCAL FUNCTION DEFINITIONS 102 ; Function Prototype declaration 103 ----------------------------------------------------------------------------*/ 104 105 /*---------------------------------------------------------------------------- 106 ; LOCAL STORE/BUFFER/POINTER DEFINITIONS 107 ; Variable declaration - defined here and used outside this module 108 ----------------------------------------------------------------------------*/ 109 110 /*---------------------------------------------------------------------------- 111 ; EXTERNAL FUNCTION REFERENCES 112 ; Declare functions defined elsewhere and referenced in this module 113 ----------------------------------------------------------------------------*/ 114 115 /*---------------------------------------------------------------------------- 116 ; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES 117 ; Declare variables used in this module but defined elsewhere 118 ----------------------------------------------------------------------------*/ 119 120 /*---------------------------------------------------------------------------- 121 ; FUNCTION CODE 122 ----------------------------------------------------------------------------*/ 123 124 void decode_noise_floorlevels(SBR_FRAME_DATA * hFrameData) 125 126 { 127 Int32 env; 128 Int32 i; 129 130 Int32 * frameInfo = hFrameData->frameInfo; 131 Int32 nNfb = hFrameData->nNfb; 132 Int32 * domain_vec = hFrameData->domain_vec2; 133 134 Int32 * sbrNoiseFloorLevel_man = hFrameData->sbrNoiseFloorLevel_man; 135 Int32 * prevNoiseLevel_man = hFrameData->prevNoiseLevel_man; 136 137 Int32 nEnv = frameInfo[(frameInfo[0] << 1) + 3]; 138 139 for (env = 0; env < nEnv; env++) 140 { 141 if (domain_vec[env] == 0) 142 { 143 prevNoiseLevel_man[0] = *(sbrNoiseFloorLevel_man++); 144 145 for (i = 1; i < nNfb; i++) 146 { 147 *sbrNoiseFloorLevel_man += *(sbrNoiseFloorLevel_man - 1); 148 prevNoiseLevel_man[i] = *(sbrNoiseFloorLevel_man++); 149 } 150 } 151 else 152 { 153 for (i = 0; i < nNfb; i++) 154 { 155 *sbrNoiseFloorLevel_man += prevNoiseLevel_man[i]; 156 prevNoiseLevel_man[i] = *(sbrNoiseFloorLevel_man++); 157 } 158 } 159 160 } 161 } 162 163 #endif 164
