1 /* ----------------------------------------------------------------------------- 2 Software License for The Fraunhofer FDK AAC Codec Library for Android 3 4 © Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten 5 Forschung e.V. All rights reserved. 6 7 1. INTRODUCTION 8 The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software 9 that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding 10 scheme for digital audio. This FDK AAC Codec software is intended to be used on 11 a wide variety of Android devices. 12 13 AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient 14 general perceptual audio codecs. AAC-ELD is considered the best-performing 15 full-bandwidth communications codec by independent studies and is widely 16 deployed. AAC has been standardized by ISO and IEC as part of the MPEG 17 specifications. 18 19 Patent licenses for necessary patent claims for the FDK AAC Codec (including 20 those of Fraunhofer) may be obtained through Via Licensing 21 (www.vialicensing.com) or through the respective patent owners individually for 22 the purpose of encoding or decoding bit streams in products that are compliant 23 with the ISO/IEC MPEG audio standards. Please note that most manufacturers of 24 Android devices already license these patent claims through Via Licensing or 25 directly from the patent owners, and therefore FDK AAC Codec software may 26 already be covered under those patent licenses when it is used for those 27 licensed purposes only. 28 29 Commercially-licensed AAC software libraries, including floating-point versions 30 with enhanced sound quality, are also available from Fraunhofer. Users are 31 encouraged to check the Fraunhofer website for additional applications 32 information and documentation. 33 34 2. COPYRIGHT LICENSE 35 36 Redistribution and use in source and binary forms, with or without modification, 37 are permitted without payment of copyright license fees provided that you 38 satisfy the following conditions: 39 40 You must retain the complete text of this software license in redistributions of 41 the FDK AAC Codec or your modifications thereto in source code form. 42 43 You must retain the complete text of this software license in the documentation 44 and/or other materials provided with redistributions of the FDK AAC Codec or 45 your modifications thereto in binary form. You must make available free of 46 charge copies of the complete source code of the FDK AAC Codec and your 47 modifications thereto to recipients of copies in binary form. 48 49 The name of Fraunhofer may not be used to endorse or promote products derived 50 from this library without prior written permission. 51 52 You may not charge copyright license fees for anyone to use, copy or distribute 53 the FDK AAC Codec software or your modifications thereto. 54 55 Your modified versions of the FDK AAC Codec must carry prominent notices stating 56 that you changed the software and the date of any change. For modified versions 57 of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android" 58 must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK 59 AAC Codec Library for Android." 60 61 3. NO PATENT LICENSE 62 63 NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without 64 limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE. 65 Fraunhofer provides no warranty of patent non-infringement with respect to this 66 software. 67 68 You may use this FDK AAC Codec software or modifications thereto only for 69 purposes that are authorized by appropriate patent licenses. 70 71 4. DISCLAIMER 72 73 This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright 74 holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, 75 including but not limited to the implied warranties of merchantability and 76 fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 77 CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, 78 or consequential damages, including but not limited to procurement of substitute 79 goods or services; loss of use, data, or profits, or business interruption, 80 however caused and on any theory of liability, whether in contract, strict 81 liability, or tort (including negligence), arising in any way out of the use of 82 this software, even if advised of the possibility of such damage. 83 84 5. CONTACT INFORMATION 85 86 Fraunhofer Institute for Integrated Circuits IIS 87 Attention: Audio and Multimedia Departments - FDK AAC LL 88 Am Wolfsmantel 33 89 91058 Erlangen, Germany 90 91 www.iis.fraunhofer.de/amm 92 amm-info@iis.fraunhofer.de 93 ----------------------------------------------------------------------------- */ 94 95 /**************************** SBR encoder library ****************************** 96 97 Author(s): 98 99 Description: 100 101 *******************************************************************************/ 102 103 /*! 104 \file 105 \brief Envelope estimation structs and prototypes $Revision: 92790 $ 106 */ 107 #ifndef ENV_EST_H 108 #define ENV_EST_H 109 110 #include "sbr_def.h" 111 #include "sbr_encoder.h" /* SBR econfig structs */ 112 #include "ps_main.h" 113 #include "bit_sbr.h" 114 #include "fram_gen.h" 115 #include "tran_det.h" 116 #include "code_env.h" 117 #include "ton_corr.h" 118 119 typedef struct { 120 FIXP_DBL *rBuffer[32]; 121 FIXP_DBL *iBuffer[32]; 122 123 FIXP_DBL *p_YBuffer; 124 125 FIXP_DBL *YBuffer[32]; 126 int YBufferScale[2]; 127 128 UCHAR envelopeCompensation[MAX_FREQ_COEFFS]; 129 UCHAR pre_transient_info[2]; 130 131 int YBufferWriteOffset; 132 int YBufferSzShift; 133 int rBufferReadOffset; 134 135 int no_cols; 136 int no_rows; 137 int start_index; 138 139 int time_slots; 140 int time_step; 141 } SBR_EXTRACT_ENVELOPE; 142 typedef SBR_EXTRACT_ENVELOPE *HANDLE_SBR_EXTRACT_ENVELOPE; 143 144 struct ENV_CHANNEL { 145 FAST_TRAN_DETECTOR sbrFastTransientDetector; 146 SBR_TRANSIENT_DETECTOR sbrTransientDetector; 147 SBR_CODE_ENVELOPE sbrCodeEnvelope; 148 SBR_CODE_ENVELOPE sbrCodeNoiseFloor; 149 SBR_EXTRACT_ENVELOPE sbrExtractEnvelope; 150 151 SBR_ENVELOPE_FRAME SbrEnvFrame; 152 SBR_TON_CORR_EST TonCorr; 153 154 struct SBR_ENV_DATA encEnvData; 155 156 int qmfScale; 157 UCHAR fLevelProtect; 158 }; 159 typedef struct ENV_CHANNEL *HANDLE_ENV_CHANNEL; 160 161 /************ Function Declarations ***************/ 162 163 INT FDKsbrEnc_CreateExtractSbrEnvelope(HANDLE_SBR_EXTRACT_ENVELOPE hSbrCut, 164 INT channel, INT chInEl, 165 UCHAR *dynamic_RAM); 166 167 INT FDKsbrEnc_InitExtractSbrEnvelope(HANDLE_SBR_EXTRACT_ENVELOPE hSbr, 168 int no_cols, int no_rows, int start_index, 169 int time_slots, int time_step, 170 int tran_off, ULONG statesInitFlag, 171 int chInEl, UCHAR *dynamic_RAM, 172 UINT sbrSyntaxFlags); 173 174 void FDKsbrEnc_deleteExtractSbrEnvelope(HANDLE_SBR_EXTRACT_ENVELOPE hSbrCut); 175 176 typedef struct { 177 FREQ_RES res[MAX_NUM_NOISE_VALUES]; 178 int maxQuantError; 179 180 } SBR_FRAME_TEMP_DATA; 181 182 typedef struct { 183 const SBR_FRAME_INFO *frame_info; 184 FIXP_DBL noiseFloor[MAX_NUM_NOISE_VALUES]; 185 SCHAR sfb_nrg_coupling 186 [MAX_NUM_ENVELOPE_VALUES]; /* only used if stereomode = SWITCH_L_R_C */ 187 SCHAR sfb_nrg[MAX_NUM_ENVELOPE_VALUES]; 188 SCHAR noise_level_coupling 189 [MAX_NUM_NOISE_VALUES]; /* only used if stereomode = SWITCH_L_R_C */ 190 SCHAR noise_level[MAX_NUM_NOISE_VALUES]; 191 UCHAR transient_info[3]; 192 UCHAR nEnvelopes; 193 } SBR_ENV_TEMP_DATA; 194 195 /* 196 * Extract features from QMF data. Afterwards, the QMF data is not required 197 * anymore. 198 */ 199 void FDKsbrEnc_extractSbrEnvelope1(HANDLE_SBR_CONFIG_DATA h_con, 200 HANDLE_SBR_HEADER_DATA sbrHeaderData, 201 HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData, 202 HANDLE_ENV_CHANNEL h_envChan, 203 HANDLE_COMMON_DATA cmonData, 204 SBR_ENV_TEMP_DATA *eData, 205 SBR_FRAME_TEMP_DATA *fData); 206 207 /* 208 * Process the previously features extracted by FDKsbrEnc_extractSbrEnvelope1 209 * and create/encode SBR envelopes. 210 */ 211 void FDKsbrEnc_extractSbrEnvelope2(HANDLE_SBR_CONFIG_DATA h_con, 212 HANDLE_SBR_HEADER_DATA sbrHeaderData, 213 HANDLE_PARAMETRIC_STEREO hParametricStereo, 214 HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData, 215 HANDLE_ENV_CHANNEL sbrEnvChannel0, 216 HANDLE_ENV_CHANNEL sbrEnvChannel1, 217 HANDLE_COMMON_DATA cmonData, 218 SBR_ENV_TEMP_DATA *eData, 219 SBR_FRAME_TEMP_DATA *fData, int clearOutput); 220 221 INT FDKsbrEnc_GetEnvEstDelay(HANDLE_SBR_EXTRACT_ENVELOPE hSbr); 222 223 #endif 224