1 2/* ----------------------------------------------------------------------------------------------------------- 3Software License for The Fraunhofer FDK AAC Codec Library for Android 4 5© Copyright 1995 - 2012 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. 6 All rights reserved. 7 8 1. INTRODUCTION 9The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements 10the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. 11This FDK AAC Codec software is intended to be used on a wide variety of Android devices. 12 13AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual 14audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by 15independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part 16of the MPEG specifications. 17 18Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) 19may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners 20individually for the purpose of encoding or decoding bit streams in products that are compliant with 21the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license 22these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec 23software may already be covered under those patent licenses when it is used for those licensed purposes only. 24 25Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, 26are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional 27applications information and documentation. 28 292. COPYRIGHT LICENSE 30 31Redistribution and use in source and binary forms, with or without modification, are permitted without 32payment of copyright license fees provided that you satisfy the following conditions: 33 34You must retain the complete text of this software license in redistributions of the FDK AAC Codec or 35your modifications thereto in source code form. 36 37You must retain the complete text of this software license in the documentation and/or other materials 38provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. 39You must make available free of charge copies of the complete source code of the FDK AAC Codec and your 40modifications thereto to recipients of copies in binary form. 41 42The name of Fraunhofer may not be used to endorse or promote products derived from this library without 43prior written permission. 44 45You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec 46software or your modifications thereto. 47 48Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software 49and 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." 52 533. NO PATENT LICENSE 54 55NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, 56ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with 57respect to this software. 58 59You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized 60by appropriate patent licenses. 61 624. DISCLAIMER 63 64This 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 66of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 67CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages, 68including but not limited to procurement of substitute goods or services; loss of use, data, or profits, 69or business interruption, however caused and on any theory of liability, whether in contract, strict 70liability, or tort (including negligence), arising in any way out of the use of this software, even if 71advised of the possibility of such damage. 72 735. CONTACT INFORMATION 74 75Fraunhofer Institute for Integrated Circuits IIS 76Attention: Audio and Multimedia Departments - FDK AAC LL 77Am Wolfsmantel 33 7891058 Erlangen, Germany 79 80www.iis.fraunhofer.de/amm 81amm-info@iis.fraunhofer.de 82----------------------------------------------------------------------------------------------------------- */ 83 84/*! 85 \file 86 \brief Memory layout 87 88 89 This module declares all static and dynamic memory spaces 90*/ 91 92#include "sbr_ram.h" 93 94 95 96 97#define WORKBUFFER1_TAG 0 98#define WORKBUFFER2_TAG 1 99 100/*! 101 \name StaticSbrData 102 103 Static memory areas, must not be overwritten in other sections of the decoder 104*/ 105/* @{ */ 106 107/*! SBR Decoder main structure */ 108C_ALLOC_MEM(Ram_SbrDecoder, struct SBR_DECODER_INSTANCE, 1) 109/*! SBR Decoder element data <br> 110 Dimension: (4) */ 111C_ALLOC_MEM2(Ram_SbrDecElement, SBR_DECODER_ELEMENT, 1, (4)) 112/*! SBR Decoder individual channel data <br> 113 Dimension: (6) */ 114C_ALLOC_MEM2(Ram_SbrDecChannel, SBR_CHANNEL, 1, (6)+1) 115 116/*! Filter states for QMF-synthesis. <br> 117 Dimension: #(6) * (#QMF_FILTER_STATE_SYN_SIZE-#(64)) */ 118C_AALLOC_MEM2_L(Ram_sbr_QmfStatesSynthesis, FIXP_QSS, (640)-(64), (6)+1, SECT_DATA_L1) 119 120/*! Delayed spectral data needed for the dynamic framing of SBR. 121 For mp3PRO, 1/3 of a frame is buffered (#(6) 6) */ 122C_AALLOC_MEM2(Ram_sbr_OverlapBuffer, FIXP_DBL, 2 * (6) * (64), (6)+1) 123 124/*! Static Data of PS */ 125 126C_ALLOC_MEM(Ram_ps_dec, PS_DEC, 1) 127 128 129/* @} */ 130 131 132/*! 133 \name DynamicSbrData 134 135 Dynamic memory areas, might be reused in other algorithm sections, 136 e.g. the core decoder 137 <br> 138 Depending on the mode set by DONT_USE_CORE_WORKBUFFER, workbuffers are 139 defined additionally to the CoreWorkbuffer. 140 <br> 141 The size of WorkBuffers is ((1024)/(32))*(64) = 2048. 142 <br> 143 WorkBuffer2 is a pointer to the CoreWorkBuffer wich is reused here in the SBR part. In case of 144 DONT_USE_CORE_WORKBUFFER, the CoreWorkbuffer is not used and the according 145 Workbuffer2 is defined locally in this file. 146 <br> 147 WorkBuffer1 is reused in the AAC core (-> aacdecoder.cpp, aac_ram.cpp) 148 <br> 149 150 Use of WorkBuffers: 151 <pre> 152 153 ------------------------------------------------------------- 154 AAC core: 155 156 CoreWorkbuffer: spectral coefficients 157 WorkBuffer1: CAacDecoderChannelInfo, CAacDecoderDynamicData 158 159 ------------------------------------------------------------- 160 SBR part: 161 ---------------------------------------------- 162 Low Power Mode (useLP=1 or LOW_POWER_SBR_ONLY), see assignLcTimeSlots() 163 164 SLOT_BASED_PROTOTYPE_SYN_FILTER 165 166 WorkBuffer1 WorkBuffer2(=CoreWorkbuffer) 167 ________________ ________________ 168 | RealLeft | | RealRight | 169 |________________| |________________| 170 171 ---------------------------------------------- 172 High Quality Mode (!LOW_POWER_SBR_ONLY and useLP=0), see assignHqTimeSlots() 173 174 SLOTBASED_PS 175 176 WorkBuffer1 WorkBuffer2(=CoreWorkbuffer) 177 ________________ ________________ 178 | Real/Imag | interleaved | Real/Imag | interleaved 179 |________________| first half actual ch |________________| second half actual ch 180 181 ------------------------------------------------------------- 182 183 </pre> 184 185*/ 186/* @{ */ 187C_ALLOC_MEM_OVERLAY(Ram_SbrDecWorkBuffer1, FIXP_DBL, ((1024)/(32))*(64), SECT_DATA_L1, WORKBUFFER1_TAG) 188C_ALLOC_MEM_OVERLAY(Ram_SbrDecWorkBuffer2, FIXP_DBL, ((1024)/(32))*(64), SECT_DATA_L2, WORKBUFFER2_TAG) 189 190/* @} */ 191 192 193 194 195