| /* ----------------------------------------------------------------------------- | |
| Software License for The Fraunhofer FDK AAC Codec Library for Android | |
| © Copyright 1995 - 2019 Fraunhofer-Gesellschaft zur Förderung der angewandten | |
| Forschung e.V. All rights reserved. | |
| 1. INTRODUCTION | |
| The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software | |
| that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding | |
| scheme for digital audio. This FDK AAC Codec software is intended to be used on | |
| a wide variety of Android devices. | |
| AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient | |
| general perceptual audio codecs. AAC-ELD is considered the best-performing | |
| full-bandwidth communications codec by independent studies and is widely | |
| deployed. AAC has been standardized by ISO and IEC as part of the MPEG | |
| specifications. | |
| Patent licenses for necessary patent claims for the FDK AAC Codec (including | |
| those of Fraunhofer) may be obtained through Via Licensing | |
| (www.vialicensing.com) or through the respective patent owners individually for | |
| the purpose of encoding or decoding bit streams in products that are compliant | |
| with the ISO/IEC MPEG audio standards. Please note that most manufacturers of | |
| Android devices already license these patent claims through Via Licensing or | |
| directly from the patent owners, and therefore FDK AAC Codec software may | |
| already be covered under those patent licenses when it is used for those | |
| licensed purposes only. | |
| Commercially-licensed AAC software libraries, including floating-point versions | |
| with enhanced sound quality, are also available from Fraunhofer. Users are | |
| encouraged to check the Fraunhofer website for additional applications | |
| information and documentation. | |
| 2. COPYRIGHT LICENSE | |
| Redistribution and use in source and binary forms, with or without modification, | |
| are permitted without payment of copyright license fees provided that you | |
| satisfy the following conditions: | |
| You must retain the complete text of this software license in redistributions of | |
| the FDK AAC Codec or your modifications thereto in source code form. | |
| You must retain the complete text of this software license in the documentation | |
| and/or other materials provided with redistributions of the FDK AAC Codec or | |
| your modifications thereto in binary form. You must make available free of | |
| charge copies of the complete source code of the FDK AAC Codec and your | |
| modifications thereto to recipients of copies in binary form. | |
| The name of Fraunhofer may not be used to endorse or promote products derived | |
| from this library without prior written permission. | |
| You may not charge copyright license fees for anyone to use, copy or distribute | |
| the FDK AAC Codec software or your modifications thereto. | |
| Your modified versions of the FDK AAC Codec must carry prominent notices stating | |
| that you changed the software and the date of any change. For modified versions | |
| of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android" | |
| must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK | |
| AAC Codec Library for Android." | |
| 3. NO PATENT LICENSE | |
| NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without | |
| limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE. | |
| Fraunhofer provides no warranty of patent non-infringement with respect to this | |
| software. | |
| You may use this FDK AAC Codec software or modifications thereto only for | |
| purposes that are authorized by appropriate patent licenses. | |
| 4. DISCLAIMER | |
| This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright | |
| holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, | |
| including but not limited to the implied warranties of merchantability and | |
| fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR | |
| CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, | |
| or consequential damages, including but not limited to procurement of substitute | |
| goods or services; loss of use, data, or profits, or business interruption, | |
| however caused and on any theory of liability, whether in contract, strict | |
| liability, or tort (including negligence), arising in any way out of the use of | |
| this software, even if advised of the possibility of such damage. | |
| 5. CONTACT INFORMATION | |
| Fraunhofer Institute for Integrated Circuits IIS | |
| Attention: Audio and Multimedia Departments - FDK AAC LL | |
| Am Wolfsmantel 33 | |
| 91058 Erlangen, Germany | |
| www.iis.fraunhofer.de/amm | |
| amm-info@iis.fraunhofer.de | |
| ----------------------------------------------------------------------------- */ | |
| /**************************** SBR decoder library ****************************** | |
| Author(s): | |
| Description: | |
| *******************************************************************************/ | |
| /*! | |
| \file | |
| \brief Memory layout | |
| This module declares all static and dynamic memory spaces | |
| */ | |
| #include "sbr_ram.h" | |
| /*! | |
| \name StaticSbrData | |
| Static memory areas, must not be overwritten in other sections of the decoder | |
| */ | |
| /* @{ */ | |
| /*! SBR Decoder main structure */ | |
| C_ALLOC_MEM(Ram_SbrDecoder, struct SBR_DECODER_INSTANCE, 1) | |
| /*! SBR Decoder element data <br> | |
| Dimension: (8) */ | |
| C_ALLOC_MEM2(Ram_SbrDecElement, SBR_DECODER_ELEMENT, 1, (8)) | |
| /*! SBR Decoder individual channel data <br> | |
| Dimension: (8) */ | |
| C_ALLOC_MEM2(Ram_SbrDecChannel, SBR_CHANNEL, 1, (8) + 1) | |
| /*! Static Data of PS */ | |
| C_ALLOC_MEM(Ram_ps_dec, struct PS_DEC, 1) | |
| /* @} */ | |
| /*! | |
| \name DynamicSbrData | |
| Dynamic memory areas, might be reused in other algorithm sections, | |
| e.g. the core decoder | |
| <br> | |
| Depending on the mode set by DONT_USE_CORE_WORKBUFFER, workbuffers are | |
| defined additionally to the CoreWorkbuffer. | |
| <br> | |
| The size of WorkBuffers is ((1024) / (32) * (4) / 2)*(64) = 2048. | |
| <br> | |
| WorkBuffer2 is a pointer to the CoreWorkBuffer wich is reused here in the SBR | |
| part. In case of DONT_USE_CORE_WORKBUFFER, the CoreWorkbuffer is not used and | |
| the according Workbuffer2 is defined locally in this file. <br> WorkBuffer1 is | |
| reused in the AAC core (-> aacdecoder.cpp, aac_ram.cpp) <br> | |
| Use of WorkBuffers: | |
| <pre> | |
| ------------------------------------------------------------- | |
| AAC core: | |
| CoreWorkbuffer: spectral coefficients | |
| WorkBuffer1: CAacDecoderChannelInfo, CAacDecoderDynamicData | |
| ------------------------------------------------------------- | |
| SBR part: | |
| ---------------------------------------------- | |
| Low Power Mode (useLP=1 or LOW_POWER_SBR_ONLY), see assignLcTimeSlots() | |
| SLOT_BASED_PROTOTYPE_SYN_FILTER | |
| WorkBuffer1 WorkBuffer2(=CoreWorkbuffer) | |
| ________________ ________________ | |
| | RealLeft | | RealRight | | |
| |________________| |________________| | |
| ---------------------------------------------- | |
| High Quality Mode (!LOW_POWER_SBR_ONLY and useLP=0), see | |
| assignHqTimeSlots() | |
| SLOTBASED_PS | |
| WorkBuffer1 WorkBuffer2(=CoreWorkbuffer) | |
| ________________ ________________ | |
| | Real/Imag | interleaved | Real/Imag | | |
| interleaved | |
| |________________| first half actual ch |________________| second | |
| half actual ch | |
| ------------------------------------------------------------- | |
| </pre> | |
| */ |