1 2 /* ----------------------------------------------------------------------------------------------------------- 3 Software License for The Fraunhofer FDK AAC Codec Library for Android 4 5 Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur Frderung der angewandten Forschung e.V. 6 All rights reserved. 7 8 1. INTRODUCTION 9 The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements 10 the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. 11 This FDK AAC Codec software is intended to be used on a wide variety of Android devices. 12 13 AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual 14 audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by 15 independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part 16 of the MPEG specifications. 17 18 Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) 19 may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners 20 individually for the purpose of encoding or decoding bit streams in products that are compliant with 21 the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license 22 these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec 23 software may already be covered under those patent licenses when it is used for those licensed purposes only. 24 25 Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, 26 are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional 27 applications information and documentation. 28 29 2. COPYRIGHT LICENSE 30 31 Redistribution and use in source and binary forms, with or without modification, are permitted without 32 payment of copyright license fees provided that you satisfy the following conditions: 33 34 You must retain the complete text of this software license in redistributions of the FDK AAC Codec or 35 your modifications thereto in source code form. 36 37 You must retain the complete text of this software license in the documentation and/or other materials 38 provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. 39 You must make available free of charge copies of the complete source code of the FDK AAC Codec and your 40 modifications thereto to recipients of copies in binary form. 41 42 The name of Fraunhofer may not be used to endorse or promote products derived from this library without 43 prior written permission. 44 45 You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec 46 software or your modifications thereto. 47 48 Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software 49 and the date of any change. For modified versions of the FDK AAC Codec, the term 50 "Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term 51 "Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android." 52 53 3. NO PATENT LICENSE 54 55 NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, 56 ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with 57 respect to this software. 58 59 You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized 60 by appropriate patent licenses. 61 62 4. DISCLAIMER 63 64 This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors 65 "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties 66 of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 67 CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages, 68 including but not limited to procurement of substitute goods or services; loss of use, data, or profits, 69 or business interruption, however caused and on any theory of liability, whether in contract, strict 70 liability, or tort (including negligence), arising in any way out of the use of this software, even if 71 advised of the possibility of such damage. 72 73 5. CONTACT INFORMATION 74 75 Fraunhofer Institute for Integrated Circuits IIS 76 Attention: Audio and Multimedia Departments - FDK AAC LL 77 Am Wolfsmantel 33 78 91058 Erlangen, Germany 79 80 www.iis.fraunhofer.de/amm 81 amm-info (at) iis.fraunhofer.de 82 ----------------------------------------------------------------------------------------------------------- */ 83 84 /*! 85 \file 86 \brief Envelope estimation structs and prototypes 87 */ 88 #ifndef __ENV_EST_H 89 #define __ENV_EST_H 90 91 #include "sbr_def.h" 92 #include "sbr_encoder.h" /* SBR econfig structs */ 93 #include "ps_main.h" 94 #include "bit_sbr.h" 95 #include "fram_gen.h" 96 #include "tran_det.h" 97 #include "code_env.h" 98 #include "ton_corr.h" 99 100 typedef struct 101 { 102 FIXP_DBL *rBuffer[QMF_MAX_TIME_SLOTS]; 103 FIXP_DBL *iBuffer[QMF_MAX_TIME_SLOTS]; 104 105 FIXP_DBL *p_YBuffer; 106 107 FIXP_DBL *YBuffer[QMF_MAX_TIME_SLOTS]; 108 int YBufferScale[2]; 109 110 UCHAR envelopeCompensation[MAX_FREQ_COEFFS]; 111 UCHAR pre_transient_info[2]; 112 113 114 int YBufferWriteOffset; 115 int YBufferSzShift; 116 int rBufferReadOffset; 117 118 int no_cols; 119 int no_rows; 120 int start_index; 121 122 int time_slots; 123 int time_step; 124 } 125 SBR_EXTRACT_ENVELOPE; 126 typedef SBR_EXTRACT_ENVELOPE *HANDLE_SBR_EXTRACT_ENVELOPE; 127 128 struct ENV_CHANNEL 129 { 130 SBR_TRANSIENT_DETECTOR sbrTransientDetector; 131 SBR_CODE_ENVELOPE sbrCodeEnvelope; 132 SBR_CODE_ENVELOPE sbrCodeNoiseFloor; 133 SBR_EXTRACT_ENVELOPE sbrExtractEnvelope; 134 135 136 SBR_ENVELOPE_FRAME SbrEnvFrame; 137 SBR_TON_CORR_EST TonCorr; 138 139 struct SBR_ENV_DATA encEnvData; 140 141 int qmfScale; 142 UCHAR fLevelProtect; 143 }; 144 typedef struct ENV_CHANNEL *HANDLE_ENV_CHANNEL; 145 146 /************ Function Declarations ***************/ 147 148 INT 149 FDKsbrEnc_CreateExtractSbrEnvelope (HANDLE_SBR_EXTRACT_ENVELOPE hSbrCut, 150 INT channel 151 ,INT chInEl 152 ,UCHAR* dynamic_RAM 153 ); 154 155 156 INT 157 FDKsbrEnc_InitExtractSbrEnvelope ( 158 HANDLE_SBR_EXTRACT_ENVELOPE hSbr, 159 int no_cols, 160 int no_rows, 161 int start_index, 162 int time_slots, int time_step, int tran_off, 163 ULONG statesInitFlag 164 ,int chInEl 165 ,UCHAR* dynamic_RAM 166 ,UINT sbrSyntaxFlags 167 ); 168 169 void FDKsbrEnc_deleteExtractSbrEnvelope (HANDLE_SBR_EXTRACT_ENVELOPE hSbrCut); 170 171 typedef struct { 172 FREQ_RES res[MAX_NUM_NOISE_VALUES]; 173 int maxQuantError; 174 175 } SBR_FRAME_TEMP_DATA; 176 177 typedef struct { 178 const SBR_FRAME_INFO *frame_info; 179 FIXP_DBL noiseFloor[MAX_NUM_NOISE_VALUES]; 180 SCHAR sfb_nrg_coupling[MAX_NUM_ENVELOPE_VALUES]; /* only used if stereomode = SWITCH_L_R_C */ 181 SCHAR sfb_nrg[MAX_NUM_ENVELOPE_VALUES]; 182 SCHAR noise_level_coupling[MAX_NUM_NOISE_VALUES]; /* only used if stereomode = SWITCH_L_R_C */ 183 SCHAR noise_level[MAX_NUM_NOISE_VALUES]; 184 UCHAR transient_info[3]; 185 UCHAR nEnvelopes; 186 } SBR_ENV_TEMP_DATA; 187 188 /* 189 * Extract features from QMF data. Afterwards, the QMF data is not required anymore. 190 */ 191 void 192 FDKsbrEnc_extractSbrEnvelope1( 193 HANDLE_SBR_CONFIG_DATA h_con, 194 HANDLE_SBR_HEADER_DATA sbrHeaderData, 195 HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData, 196 HANDLE_ENV_CHANNEL h_envChan, 197 HANDLE_COMMON_DATA cmonData, 198 SBR_ENV_TEMP_DATA *eData, 199 SBR_FRAME_TEMP_DATA *fData 200 ); 201 202 203 /* 204 * Process the previously features extracted by FDKsbrEnc_extractSbrEnvelope1 205 * and create/encode SBR envelopes. 206 */ 207 void 208 FDKsbrEnc_extractSbrEnvelope2( 209 HANDLE_SBR_CONFIG_DATA h_con, 210 HANDLE_SBR_HEADER_DATA sbrHeaderData, 211 HANDLE_PARAMETRIC_STEREO hParametricStereo, 212 HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData, 213 HANDLE_ENV_CHANNEL sbrEnvChannel0, 214 HANDLE_ENV_CHANNEL sbrEnvChannel1, 215 HANDLE_COMMON_DATA cmonData, 216 SBR_ENV_TEMP_DATA *eData, 217 SBR_FRAME_TEMP_DATA *fData, 218 int clearOutput 219 ); 220 221 INT 222 FDKsbrEnc_GetEnvEstDelay(HANDLE_SBR_EXTRACT_ENVELOPE hSbr); 223 224 #endif 225
