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 Main SBR structs definitions $Revision: 92790 $ 106 */ 107 108 #ifndef SBR_H 109 #define SBR_H 110 111 #include "fram_gen.h" 112 #include "bit_sbr.h" 113 #include "tran_det.h" 114 #include "code_env.h" 115 #include "env_est.h" 116 #include "cmondata.h" 117 118 #include "qmf.h" 119 #include "resampler.h" 120 121 #include "ton_corr.h" 122 123 /* SBR bitstream delay */ 124 #define MAX_DELAY_FRAMES 2 125 126 /* sbr encoder downsampling type */ 127 typedef enum { SBRENC_DS_NONE, SBRENC_DS_TIME, SBRENC_DS_QMF } SBRENC_DS_TYPE; 128 129 typedef struct SBR_CHANNEL { 130 struct ENV_CHANNEL hEnvChannel; 131 // INT_PCM *pDSOutBuffer; /**< Pointer to 132 // downsampled audio output of SBR encoder */ 133 DOWNSAMPLER downSampler; 134 135 } SBR_CHANNEL; 136 typedef SBR_CHANNEL* HANDLE_SBR_CHANNEL; 137 138 typedef struct SBR_ELEMENT { 139 HANDLE_SBR_CHANNEL sbrChannel[2]; 140 QMF_FILTER_BANK* hQmfAnalysis[2]; 141 SBR_CONFIG_DATA sbrConfigData; 142 SBR_HEADER_DATA sbrHeaderData; 143 SBR_BITSTREAM_DATA sbrBitstreamData; 144 COMMON_DATA CmonData; 145 INT dynXOverFreqDelay[5]; /**< to delay a frame (I don't like it that much 146 that way - hrc) */ 147 SBR_ELEMENT_INFO elInfo; 148 149 UCHAR payloadDelayLine[1 + MAX_DELAY_FRAMES][MAX_PAYLOAD_SIZE]; 150 UINT payloadDelayLineSize[1 + MAX_DELAY_FRAMES]; /* Sizes in bits */ 151 152 } SBR_ELEMENT, *HANDLE_SBR_ELEMENT; 153 154 typedef struct SBR_ENCODER { 155 HANDLE_SBR_ELEMENT sbrElement[(8)]; 156 HANDLE_SBR_CHANNEL pSbrChannel[(8)]; 157 QMF_FILTER_BANK QmfAnalysis[(8)]; 158 DOWNSAMPLER lfeDownSampler; 159 int lfeChIdx; /* -1 default for no lfe, else assign channel index. */ 160 int noElements; /* Number of elements. */ 161 int nChannels; /* Total channel count across all elements. */ 162 int frameSize; /* SBR framelength. */ 163 int bufferOffset; /* Offset for SBR parameter extraction in time domain input 164 buffer. */ 165 int downsampledOffset; /* Offset of downsampled/mixed output for core encoder. 166 */ 167 int downmixSize; /* Size in samples of downsampled/mixed output for core 168 encoder. */ 169 INT downSampleFactor; /* Sampling rate relation between the SBR and the core 170 encoder. */ 171 SBRENC_DS_TYPE 172 downsamplingMethod; /* Method of downsmapling, time-domain, QMF or none. 173 */ 174 int nBitstrDelay; /* Amount of SBR frames to be delayed in bitstream domain. 175 */ 176 int sbrDecDelay; /* SBR decoder delay in samples */ 177 INT estimateBitrate; /* Estimate bitrate of SBR encoder. */ 178 INT inputDataDelay; /* Delay caused by downsampler, in/out buffer at 179 sbrEncoder_EncodeFrame. */ 180 181 UCHAR* dynamicRam; 182 UCHAR* pSBRdynamic_RAM; 183 184 HANDLE_PARAMETRIC_STEREO hParametricStereo; 185 QMF_FILTER_BANK qmfSynthesisPS; 186 187 /* parameters describing allocation volume of present instance */ 188 INT maxElements; 189 INT maxChannels; 190 INT supportPS; 191 192 } SBR_ENCODER; 193 194 #endif /* SBR_H */ 195