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 decoder library ****************************** 96 97 Author(s): 98 99 Description: 100 101 *******************************************************************************/ 102 103 /*! 104 \file 105 \brief Memory layout 106 */ 107 #ifndef SBR_RAM_H 108 #define SBR_RAM_H 109 110 #include "sbrdecoder.h" 111 112 #include "env_extr.h" 113 #include "sbr_dec.h" 114 115 #define SBRDEC_MAX_CH_PER_ELEMENT (2) 116 117 #define FRAME_OK (0) 118 #define FRAME_ERROR (1) 119 #define FRAME_ERROR_ALLSLOTS (2) 120 121 typedef struct { 122 SBR_CHANNEL *pSbrChannel[SBRDEC_MAX_CH_PER_ELEMENT]; 123 TRANSPOSER_SETTINGS 124 transposerSettings; /* Common transport settings for each individual 125 channel of an element */ 126 HANDLE_FDK_BITSTREAM hBs; 127 128 MP4_ELEMENT_ID 129 elementID; /* Element ID set during initialization. Can be used for 130 concealment */ 131 int nChannels; /* Number of elements output channels (=2 in case of PS) */ 132 133 UCHAR frameErrorFlag[(1) + 1]; /* Frame error status (for every slot in the 134 delay line). Will be copied into header at 135 the very beginning of decodeElement() 136 routine. */ 137 138 UCHAR useFrameSlot; /* Index which defines which slot will be decoded/filled 139 next (used with additional delay) */ 140 UCHAR useHeaderSlot[(1) + 1]; /* Index array that provides the link between 141 header and frame data (important when 142 processing with additional delay). */ 143 } SBR_DECODER_ELEMENT; 144 145 struct SBR_DECODER_INSTANCE { 146 SBR_DECODER_ELEMENT *pSbrElement[(8)]; 147 SBR_HEADER_DATA sbrHeader[( 148 8)][(1) + 1]; /* Sbr header for each individual channel of an element */ 149 150 HANDLE_FDK_QMF_DOMAIN pQmfDomain; 151 152 HANDLE_PS_DEC hParametricStereoDec; 153 154 /* Global parameters */ 155 AUDIO_OBJECT_TYPE coreCodec; /* AOT of core codec */ 156 int numSbrElements; 157 int numSbrChannels; 158 INT sampleRateIn; /* SBR decoder input sampling rate; might be different than 159 the transposer input sampling rate. */ 160 INT sampleRateOut; /* Sampling rate of the SBR decoder output audio samples. 161 */ 162 USHORT codecFrameSize; 163 UCHAR synDownsampleFac; 164 INT downscaleFactor; 165 UCHAR numDelayFrames; /* The current number of additional delay frames used 166 for processing. */ 167 UCHAR harmonicSBR; 168 UCHAR 169 numFlushedFrames; /* The variable counts the number of frames which are 170 flushed consecutively. */ 171 172 UINT flags; 173 }; 174 175 H_ALLOC_MEM(Ram_SbrDecElement, SBR_DECODER_ELEMENT) 176 H_ALLOC_MEM(Ram_SbrDecChannel, SBR_CHANNEL) 177 H_ALLOC_MEM(Ram_SbrDecoder, struct SBR_DECODER_INSTANCE) 178 179 H_ALLOC_MEM(Ram_sbr_QmfStatesSynthesis, FIXP_QSS) 180 H_ALLOC_MEM(Ram_sbr_OverlapBuffer, FIXP_DBL) 181 182 H_ALLOC_MEM(Ram_sbr_HBEOverlapBuffer, FIXP_DBL) 183 184 H_ALLOC_MEM(Ram_ps_dec, PS_DEC) 185 186 #endif /* SBR_RAM_H */ 187