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: sbr_open.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 81 /*---------------------------------------------------------------------------- 82 ; INCLUDES 83 ----------------------------------------------------------------------------*/ 84 85 #ifdef AAC_PLUS 86 87 88 #include "sbr_open.h" 89 #include "s_sbr_header_data.h" 90 #include "init_sbr_dec.h" 91 #include "e_sbr_error.h" 92 #include "aac_mem_funcs.h" 93 94 95 /*---------------------------------------------------------------------------- 96 ; MACROS 97 ; Define module specific macros here 98 ----------------------------------------------------------------------------*/ 99 100 101 /*---------------------------------------------------------------------------- 102 ; DEFINES 103 ; Include all pre-processor statements here. Include conditional 104 ; compile variables also. 105 ----------------------------------------------------------------------------*/ 106 107 /*---------------------------------------------------------------------------- 108 ; LOCAL FUNCTION DEFINITIONS 109 ; Function Prototype declaration 110 ----------------------------------------------------------------------------*/ 111 112 /*---------------------------------------------------------------------------- 113 ; LOCAL STORE/BUFFER/POINTER DEFINITIONS 114 ; Variable declaration - defined here and used outside this module 115 ----------------------------------------------------------------------------*/ 116 const SBR_HEADER_DATA defaultHeader = 117 { 118 HEADER_NOT_INITIALIZED, /* status */ 119 MASTER_RESET, /* masterStatus */ 120 0, /* crcEnable */ 121 UP_BY_2, /* sampleRateMode */ 122 SBR_AMP_RES_3_0, /* ampResolution */ 123 5, /* startFreq */ 124 0, /* stopFreq */ 125 0, /* xover_band */ 126 SBR_FREQ_SCALE_DEFAULT, /* freqScale */ 127 SBR_ALTER_SCALE_DEFAULT, /* alterScale */ 128 SBR_NOISE_BANDS_DEFAULT, /* noise_bands */ 129 0, /* noNoiseBands */ 130 SBR_LIMITER_BANDS_DEFAULT, 131 SBR_LIMITER_GAINS_DEFAULT, 132 SBR_INTERPOL_FREQ_DEFAULT, 133 SBR_SMOOTHING_LENGTH_DEFAULT 134 }; 135 136 /*---------------------------------------------------------------------------- 137 ; EXTERNAL FUNCTION REFERENCES 138 ; Declare functions defined elsewhere and referenced in this module 139 ----------------------------------------------------------------------------*/ 140 141 /*---------------------------------------------------------------------------- 142 ; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES 143 ; Declare variables used in this module but defined elsewhere 144 ----------------------------------------------------------------------------*/ 145 146 /*---------------------------------------------------------------------------- 147 ; FUNCTION CODE 148 ----------------------------------------------------------------------------*/ 149 150 void sbr_open(Int32 sampleRate, 151 SBR_DEC *sbrDec, 152 SBRDECODER_DATA * self, 153 bool bDownSampledSbr) 154 155 { 156 Int16 i ; 157 158 SBR_CHANNEL *SbrChannel; 159 160 161 SbrChannel = self->SbrChannel; 162 163 for (i = 0; i < MAX_NUM_CHANNELS; i++) 164 { 165 pv_memset((void *)&(SbrChannel[i]), 166 0, 167 sizeof(SBR_CHANNEL)); 168 169 /* init a default header such that we can at least do upsampling later */ 170 171 pv_memcpy(&(SbrChannel[i].frameData.sbr_header), 172 &defaultHeader, 173 sizeof(SBR_HEADER_DATA)); 174 175 /* should be handled by sample rate mode bit */ 176 if (sampleRate > 24000 || bDownSampledSbr) 177 { 178 SbrChannel[i].frameData.sbr_header.sampleRateMode = SINGLE_RATE; 179 } 180 181 182 SbrChannel[i].outFrameSize = 183 init_sbr_dec(sampleRate, 184 self->SbrChannel[0].frameData.sbr_header.sampleRateMode, 185 sbrDec, 186 &(SbrChannel[i].frameData)); 187 188 SbrChannel[i].syncState = UPSAMPLING; 189 190 SbrChannel[i].frameData.sUp = 1; /* reset mode */ 191 } 192 } 193 194 #endif 195 196
