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90c29e0808
Bug: 149514474 Test: atest DecoderTestXheAac DecoderTestAacDrc Change-Id: I7aea2898a3c49e06209fae89d734939c100e1184
189 lines
7.3 KiB
C++
189 lines
7.3 KiB
C++
/* -----------------------------------------------------------------------------
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Software License for The Fraunhofer FDK AAC Codec Library for Android
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© Copyright 1995 - 2019 Fraunhofer-Gesellschaft zur Förderung der angewandten
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Forschung e.V. All rights reserved.
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1. INTRODUCTION
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The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
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that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
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scheme for digital audio. This FDK AAC Codec software is intended to be used on
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a wide variety of Android devices.
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AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
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general perceptual audio codecs. AAC-ELD is considered the best-performing
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full-bandwidth communications codec by independent studies and is widely
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deployed. AAC has been standardized by ISO and IEC as part of the MPEG
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specifications.
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Patent licenses for necessary patent claims for the FDK AAC Codec (including
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those of Fraunhofer) may be obtained through Via Licensing
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(www.vialicensing.com) or through the respective patent owners individually for
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the purpose of encoding or decoding bit streams in products that are compliant
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with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
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Android devices already license these patent claims through Via Licensing or
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directly from the patent owners, and therefore FDK AAC Codec software may
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already be covered under those patent licenses when it is used for those
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licensed purposes only.
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Commercially-licensed AAC software libraries, including floating-point versions
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with enhanced sound quality, are also available from Fraunhofer. Users are
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encouraged to check the Fraunhofer website for additional applications
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information and documentation.
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2. COPYRIGHT LICENSE
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Redistribution and use in source and binary forms, with or without modification,
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are permitted without payment of copyright license fees provided that you
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satisfy the following conditions:
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You must retain the complete text of this software license in redistributions of
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the FDK AAC Codec or your modifications thereto in source code form.
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You must retain the complete text of this software license in the documentation
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and/or other materials provided with redistributions of the FDK AAC Codec or
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your modifications thereto in binary form. You must make available free of
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charge copies of the complete source code of the FDK AAC Codec and your
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modifications thereto to recipients of copies in binary form.
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The name of Fraunhofer may not be used to endorse or promote products derived
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from this library without prior written permission.
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You may not charge copyright license fees for anyone to use, copy or distribute
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the FDK AAC Codec software or your modifications thereto.
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Your modified versions of the FDK AAC Codec must carry prominent notices stating
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that you changed the software and the date of any change. For modified versions
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of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
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must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
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AAC Codec Library for Android."
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3. NO PATENT LICENSE
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NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
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limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
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Fraunhofer provides no warranty of patent non-infringement with respect to this
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software.
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You may use this FDK AAC Codec software or modifications thereto only for
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purposes that are authorized by appropriate patent licenses.
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4. DISCLAIMER
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This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
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holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
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including but not limited to the implied warranties of merchantability and
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fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
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or consequential damages, including but not limited to procurement of substitute
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goods or services; loss of use, data, or profits, or business interruption,
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however caused and on any theory of liability, whether in contract, strict
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liability, or tort (including negligence), arising in any way out of the use of
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this software, even if advised of the possibility of such damage.
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5. CONTACT INFORMATION
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Fraunhofer Institute for Integrated Circuits IIS
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Attention: Audio and Multimedia Departments - FDK AAC LL
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Am Wolfsmantel 33
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91058 Erlangen, Germany
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www.iis.fraunhofer.de/amm
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amm-info@iis.fraunhofer.de
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----------------------------------------------------------------------------- */
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/**************************** SBR decoder library ******************************
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Author(s):
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Description:
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*******************************************************************************/
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/*!
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\file
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\brief Memory layout
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This module declares all static and dynamic memory spaces
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*/
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#include "sbr_ram.h"
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/*!
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\name StaticSbrData
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Static memory areas, must not be overwritten in other sections of the decoder
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*/
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/* @{ */
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/*! SBR Decoder main structure */
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C_ALLOC_MEM(Ram_SbrDecoder, struct SBR_DECODER_INSTANCE, 1)
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/*! SBR Decoder element data <br>
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Dimension: (8) */
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C_ALLOC_MEM2(Ram_SbrDecElement, SBR_DECODER_ELEMENT, 1, (8))
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/*! SBR Decoder individual channel data <br>
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Dimension: (8) */
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C_ALLOC_MEM2(Ram_SbrDecChannel, SBR_CHANNEL, 1, (8) + 1)
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/*! Static Data of PS */
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C_ALLOC_MEM(Ram_ps_dec, struct PS_DEC, 1)
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/* @} */
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/*!
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\name DynamicSbrData
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Dynamic memory areas, might be reused in other algorithm sections,
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e.g. the core decoder
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<br>
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Depending on the mode set by DONT_USE_CORE_WORKBUFFER, workbuffers are
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defined additionally to the CoreWorkbuffer.
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<br>
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The size of WorkBuffers is ((1024) / (32) * (4) / 2)*(64) = 2048.
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<br>
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WorkBuffer2 is a pointer to the CoreWorkBuffer wich is reused here in the SBR
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part. In case of DONT_USE_CORE_WORKBUFFER, the CoreWorkbuffer is not used and
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the according Workbuffer2 is defined locally in this file. <br> WorkBuffer1 is
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reused in the AAC core (-> aacdecoder.cpp, aac_ram.cpp) <br>
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Use of WorkBuffers:
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<pre>
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-------------------------------------------------------------
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AAC core:
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CoreWorkbuffer: spectral coefficients
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WorkBuffer1: CAacDecoderChannelInfo, CAacDecoderDynamicData
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-------------------------------------------------------------
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SBR part:
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----------------------------------------------
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Low Power Mode (useLP=1 or LOW_POWER_SBR_ONLY), see assignLcTimeSlots()
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SLOT_BASED_PROTOTYPE_SYN_FILTER
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WorkBuffer1 WorkBuffer2(=CoreWorkbuffer)
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________________ ________________
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| RealLeft | | RealRight |
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|________________| |________________|
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----------------------------------------------
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High Quality Mode (!LOW_POWER_SBR_ONLY and useLP=0), see
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assignHqTimeSlots()
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SLOTBASED_PS
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WorkBuffer1 WorkBuffer2(=CoreWorkbuffer)
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________________ ________________
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| Real/Imag | interleaved | Real/Imag |
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interleaved
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|________________| first half actual ch |________________| second
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half actual ch
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-------------------------------------------------------------
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</pre>
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*/
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