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Diffstat (limited to 'fdk-aac/libSBRdec/src/sbr_ram.cpp')
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diff --git a/fdk-aac/libSBRdec/src/sbr_ram.cpp b/fdk-aac/libSBRdec/src/sbr_ram.cpp new file mode 100644 index 0000000..8b35fd2 --- /dev/null +++ b/fdk-aac/libSBRdec/src/sbr_ram.cpp @@ -0,0 +1,191 @@ +/* ----------------------------------------------------------------------------- +Software License for The Fraunhofer FDK AAC Codec Library for Android + +© Copyright 1995 - 2018 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" + +#define WORKBUFFER1_TAG 2 +#define WORKBUFFER2_TAG 3 + +/*! + \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> + +*/ |