2018-02-26 20:17:00 +01:00
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/* -----------------------------------------------------------------------------
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2012-07-11 19:15:24 +02:00
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Software License for The Fraunhofer FDK AAC Codec Library for Android
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2018-02-26 20:17:00 +01:00
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© Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
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Forschung e.V. All rights reserved.
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2012-07-11 19:15:24 +02:00
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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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2012-07-11 19:15:24 +02:00
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2. COPYRIGHT LICENSE
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2018-02-26 20:17:00 +01:00
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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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2012-07-11 19:15:24 +02:00
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2018-02-26 20:17:00 +01:00
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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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2018-02-26 20:17:00 +01:00
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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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2018-02-26 20:17:00 +01:00
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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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2018-02-26 20:17:00 +01:00
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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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2018-02-26 20:17:00 +01:00
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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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2018-02-26 20:17:00 +01:00
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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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2018-02-26 20:17:00 +01:00
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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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2012-07-11 19:15:24 +02:00
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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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2018-02-26 20:17:00 +01:00
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/******************* Library for basic calculation routines ********************
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Author(s): Oliver Moser
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2012-07-11 19:15:24 +02:00
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Description: ROM tables used by FDK tools
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2018-02-26 20:17:00 +01:00
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*******************************************************************************/
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#ifndef FDK_TOOLS_ROM_H
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#define FDK_TOOLS_ROM_H
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#include "common_fix.h"
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#include "FDK_audio.h"
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/* sinetables */
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/* None radix2 rotation vectors */
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extern RAM_ALIGN const FIXP_STB RotVectorReal60[60];
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extern RAM_ALIGN const FIXP_STB RotVectorImag60[60];
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extern RAM_ALIGN const FIXP_STB RotVectorReal192[192];
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extern RAM_ALIGN const FIXP_STB RotVectorImag192[192];
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extern RAM_ALIGN const FIXP_STB RotVectorReal240[210];
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extern RAM_ALIGN const FIXP_STB RotVectorImag240[210];
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extern RAM_ALIGN const FIXP_STB RotVectorReal480[480];
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extern RAM_ALIGN const FIXP_STB RotVectorImag480[480];
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extern RAM_ALIGN const FIXP_STB RotVectorReal6[6];
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extern RAM_ALIGN const FIXP_STB RotVectorImag6[6];
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extern RAM_ALIGN const FIXP_STB RotVectorReal12[12];
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extern RAM_ALIGN const FIXP_STB RotVectorImag12[12];
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extern RAM_ALIGN const FIXP_STB RotVectorReal24[24];
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extern RAM_ALIGN const FIXP_STB RotVectorImag24[24];
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extern RAM_ALIGN const FIXP_STB RotVectorReal48[48];
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extern RAM_ALIGN const FIXP_STB RotVectorImag48[48];
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extern RAM_ALIGN const FIXP_STB RotVectorReal80[80];
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extern RAM_ALIGN const FIXP_STB RotVectorImag80[80];
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extern RAM_ALIGN const FIXP_STB RotVectorReal96[96];
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extern RAM_ALIGN const FIXP_STB RotVectorImag96[96];
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extern RAM_ALIGN const FIXP_STB RotVectorReal384[384];
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extern RAM_ALIGN const FIXP_STB RotVectorImag384[384];
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extern RAM_ALIGN const FIXP_STB RotVectorReal20[20];
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extern RAM_ALIGN const FIXP_STB RotVectorImag20[20];
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extern RAM_ALIGN const FIXP_STB RotVectorReal120[120];
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extern RAM_ALIGN const FIXP_STB RotVectorImag120[120];
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/* Regular sine tables */
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extern RAM_ALIGN const FIXP_STP SineTable1024[];
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extern RAM_ALIGN const FIXP_STP SineTable512[];
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extern RAM_ALIGN const FIXP_STP SineTable480[];
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extern RAM_ALIGN const FIXP_STP SineTable384[];
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extern RAM_ALIGN const FIXP_STP SineTable80[];
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#ifdef INCLUDE_SineTable10
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extern RAM_ALIGN const FIXP_STP SineTable10[];
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#endif
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/* AAC-LC windows */
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extern RAM_ALIGN const FIXP_WTP SineWindow1024[];
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extern RAM_ALIGN const FIXP_WTP KBDWindow1024[];
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extern RAM_ALIGN const FIXP_WTP SineWindow128[];
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extern RAM_ALIGN const FIXP_WTP KBDWindow128[];
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extern RAM_ALIGN const FIXP_WTP SineWindow960[];
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extern RAM_ALIGN const FIXP_WTP KBDWindow960[];
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extern RAM_ALIGN const FIXP_WTP SineWindow120[];
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extern RAM_ALIGN const FIXP_WTP KBDWindow120[];
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/* AAC-LD windows */
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extern RAM_ALIGN const FIXP_WTP SineWindow512[];
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#define LowOverlapWindow512 SineWindow128
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extern RAM_ALIGN const FIXP_WTP SineWindow480[];
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#define LowOverlapWindow480 SineWindow120
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/* USAC TCX Window */
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extern RAM_ALIGN const FIXP_WTP SineWindow256[256];
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extern RAM_ALIGN const FIXP_WTP SineWindow192[];
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/* USAC 8/3 windows */
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extern RAM_ALIGN const FIXP_WTP SineWindow768[];
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extern RAM_ALIGN const FIXP_WTP KBDWindow768[];
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extern RAM_ALIGN const FIXP_WTP SineWindow96[];
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extern RAM_ALIGN const FIXP_WTP KBDWindow96[];
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/* DCT and others */
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extern RAM_ALIGN const FIXP_WTP SineWindow64[];
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extern RAM_ALIGN const FIXP_WTP SineWindow48[];
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extern RAM_ALIGN const FIXP_WTP SineWindow32[];
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extern RAM_ALIGN const FIXP_WTP SineWindow24[];
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extern RAM_ALIGN const FIXP_WTP SineWindow16[];
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extern RAM_ALIGN const FIXP_WTP SineWindow8[];
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/**
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* \brief Helper table for window slope mapping. You should prefer the usage of
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* the function FDKgetWindowSlope(), this table is only made public for some
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* optimized access inside dct.cpp.
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*/
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extern const FIXP_WTP *const windowSlopes[2][4][9];
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/**
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* \brief Window slope access helper. Obtain a window of given length and shape.
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* \param length Length of the window slope.
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* \param shape Shape index of the window slope. 0: sine window, 1:
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* Kaiser-Bessel. Any other value is applied a mask of 1 to, mapping it to
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* either 0 or 1.
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* \param Pointer to window slope or NULL if the requested window slope is not
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* available.
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*/
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const FIXP_WTP *FDKgetWindowSlope(int length, int shape);
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extern const FIXP_WTP sin_twiddle_L64[];
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/*
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* Filter coefficient type definition
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*/
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#if defined(ARCH_PREFER_MULT_16x16) || defined(ARCH_PREFER_MULT_32x16)
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#define QMF_COEFF_16BIT
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#endif
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#define QMF_FILTER_PROTOTYPE_SIZE 640
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#define QMF_NO_POLY 5
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#ifdef QMF_COEFF_16BIT
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#define FIXP_PFT FIXP_SGL
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#define FIXP_QTW FIXP_SGL
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#define FX_DBL2FX_QTW(x) FX_DBL2FX_SGL(x)
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#else
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#define FIXP_PFT FIXP_DBL
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#define FIXP_QTW FIXP_DBL
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#define FX_DBL2FX_QTW(x) (x)
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#endif
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#define QMF640_PFT_TABLE_SIZE (640 / 2 + QMF_NO_POLY)
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/* Resampling twiddles for QMF */
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/* Not resampling twiddles */
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extern RAM_ALIGN const FIXP_QTW qmf_phaseshift_cos32[32];
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extern RAM_ALIGN const FIXP_QTW qmf_phaseshift_sin32[32];
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/* Adapted analysis post-twiddles for down-sampled HQ SBR */
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extern RAM_ALIGN const FIXP_QTW qmf_phaseshift_cos_downsamp32[32];
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extern RAM_ALIGN const FIXP_QTW qmf_phaseshift_sin_downsamp32[32];
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extern RAM_ALIGN const FIXP_QTW qmf_phaseshift_cos64[64];
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extern RAM_ALIGN const FIXP_QTW qmf_phaseshift_sin64[64];
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extern RAM_ALIGN const FIXP_PFT
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qmf_pfilt640[QMF640_PFT_TABLE_SIZE + QMF_NO_POLY];
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extern RAM_ALIGN const FIXP_PFT qmf_pfilt640_vector[640];
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extern RAM_ALIGN const FIXP_QTW qmf_phaseshift_cos40[40];
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extern RAM_ALIGN const FIXP_QTW qmf_phaseshift_sin40[40];
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extern RAM_ALIGN const FIXP_PFT qmf_pfilt400[];
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extern RAM_ALIGN const FIXP_PFT qmf_pfilt200[];
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extern RAM_ALIGN const FIXP_PFT qmf_pfilt120[];
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extern RAM_ALIGN const FIXP_QTW qmf_phaseshift_cos24[24];
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extern RAM_ALIGN const FIXP_QTW qmf_phaseshift_sin24[24];
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extern RAM_ALIGN const FIXP_PFT qmf_pfilt240[];
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extern RAM_ALIGN const FIXP_QTW qmf_phaseshift_cos16[16];
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extern RAM_ALIGN const FIXP_QTW qmf_phaseshift_sin16[16];
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#define QMF640_CLDFB_PFT_TABLE_SIZE (640)
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#define QMF320_CLDFB_PFT_TABLE_SIZE (320)
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#define QMF_CLDFB_PFT_SCALE 1
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extern const FIXP_QTW qmf_phaseshift_cos32_cldfb_ana[32];
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extern const FIXP_QTW qmf_phaseshift_cos32_cldfb_syn[32];
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extern const FIXP_QTW qmf_phaseshift_sin32_cldfb[32];
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extern const FIXP_QTW qmf_phaseshift_cos16_cldfb_ana[16];
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extern const FIXP_QTW qmf_phaseshift_cos16_cldfb_syn[16];
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extern const FIXP_QTW qmf_phaseshift_sin16_cldfb[16];
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extern const FIXP_QTW qmf_phaseshift_cos8_cldfb_ana[8];
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extern const FIXP_QTW qmf_phaseshift_cos8_cldfb_syn[8];
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extern const FIXP_QTW qmf_phaseshift_sin8_cldfb[8];
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2012-07-11 19:15:24 +02:00
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extern const FIXP_QTW qmf_phaseshift_cos64_cldfb[64];
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extern const FIXP_QTW qmf_phaseshift_sin64_cldfb[64];
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2018-02-26 20:17:00 +01:00
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extern RAM_ALIGN const FIXP_PFT qmf_cldfb_640[QMF640_CLDFB_PFT_TABLE_SIZE];
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extern RAM_ALIGN const FIXP_PFT qmf_cldfb_320[QMF320_CLDFB_PFT_TABLE_SIZE];
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#define QMF160_CLDFB_PFT_TABLE_SIZE (160)
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extern RAM_ALIGN const FIXP_PFT qmf_cldfb_160[QMF160_CLDFB_PFT_TABLE_SIZE];
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#define QMF80_CLDFB_PFT_TABLE_SIZE (80)
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extern RAM_ALIGN const FIXP_PFT qmf_cldfb_80[QMF80_CLDFB_PFT_TABLE_SIZE];
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2012-07-11 19:15:24 +02:00
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2018-02-26 20:17:00 +01:00
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#define QMF320_MPSLDFB_PFT_TABLE_SIZE (320)
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#define QMF640_MPSLDFB_PFT_TABLE_SIZE (640)
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#define QMF_MPSLDFB_PFT_SCALE 1
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2012-07-11 19:15:24 +02:00
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2018-02-26 20:17:00 +01:00
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extern const FIXP_PFT qmf_mpsldfb_320[QMF320_MPSLDFB_PFT_TABLE_SIZE];
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extern RAM_ALIGN const FIXP_PFT qmf_mpsldfb_640[QMF640_MPSLDFB_PFT_TABLE_SIZE];
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2012-07-11 19:15:24 +02:00
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2018-02-26 20:17:00 +01:00
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/**
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* Audio bitstream element specific syntax flags:
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*/
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#define AC_EL_GA_CCE 0x00000001 /*!< GA AAC coupling channel element (CCE) */
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2012-07-11 19:15:24 +02:00
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/*
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2018-02-26 20:17:00 +01:00
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* Raw Data Block list items.
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2012-07-11 19:15:24 +02:00
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*/
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typedef enum {
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element_instance_tag,
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2018-02-26 20:17:00 +01:00
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common_window, /* -> decision for link_sequence */
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2012-07-11 19:15:24 +02:00
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global_gain,
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2018-02-26 20:17:00 +01:00
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ics_info, /* ics_reserved_bit, window_sequence, window_shape, max_sfb,
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scale_factor_grouping, predictor_data_present, ltp_data_present,
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ltp_data */
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2012-07-11 19:15:24 +02:00
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max_sfb,
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2018-02-26 20:17:00 +01:00
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ms, /* ms_mask_present, ms_used */
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2012-07-11 19:15:24 +02:00
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/*predictor_data_present,*/ /* part of ics_info */
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ltp_data_present,
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ltp_data,
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section_data,
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scale_factor_data,
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pulse, /* pulse_data_present, pulse_data */
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tns_data_present,
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tns_data,
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gain_control_data_present,
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gain_control_data,
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esc1_hcr,
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esc2_rvlc,
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spectral_data,
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scale_factor_data_usac,
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2018-02-26 20:17:00 +01:00
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core_mode, /* -> decision for link_sequence */
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2012-07-11 19:15:24 +02:00
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common_tw,
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lpd_channel_stream,
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tw_data,
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noise,
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ac_spectral_data,
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fac_data,
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tns_active, /* introduced in MPEG-D usac CD */
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tns_data_present_usac,
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common_max_sfb,
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2018-02-26 20:17:00 +01:00
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coupled_elements, /* only for CCE parsing */
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gain_element_lists, /* only for CCE parsing */
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2012-07-11 19:15:24 +02:00
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/* Non data list items */
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adtscrc_start_reg1,
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adtscrc_start_reg2,
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adtscrc_end_reg1,
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adtscrc_end_reg2,
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drmcrc_start_reg,
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drmcrc_end_reg,
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next_channel,
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next_channel_loop,
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link_sequence,
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end_of_sequence
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} rbd_id_t;
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struct element_list {
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const rbd_id_t *id;
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const struct element_list *next[2];
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};
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typedef struct element_list element_list_t;
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/**
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* \brief get elementary stream pieces list for given parameters.
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* \param aot audio object type
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* \param epConfig the epConfig value from the current Audio Specific Config
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* \param nChannels amount of channels contained in the current element.
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* \param layer the layer of the current element.
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2018-02-26 20:17:00 +01:00
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* \param elFlags element specific flags.
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2012-07-11 19:15:24 +02:00
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* \return element_list_t parser guidance structure.
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*/
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2018-02-26 20:17:00 +01:00
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const element_list_t *getBitstreamElementList(AUDIO_OBJECT_TYPE aot,
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SCHAR epConfig, UCHAR nChannels,
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UCHAR layer, UINT elFlags);
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2012-07-11 19:15:24 +02:00
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2018-02-26 20:17:00 +01:00
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typedef enum {
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/* n.a. */
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FDK_FORMAT_1_0 = 1, /* mono */
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FDK_FORMAT_2_0 = 2, /* stereo */
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FDK_FORMAT_3_0_FC = 3, /* 3/0.0 */
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FDK_FORMAT_3_1_0 = 4, /* 3/1.0 */
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FDK_FORMAT_5_0 = 5, /* 3/2.0 */
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FDK_FORMAT_5_1 = 6, /* 5.1 */
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FDK_FORMAT_7_1_ALT = 7, /* 5/2.1 ALT */
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/* 8 n.a.*/
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FDK_FORMAT_3_0_RC = 9, /* 2/1.0 */
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FDK_FORMAT_2_2_0 = 10, /* 2/2.0 */
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FDK_FORMAT_6_1 = 11, /* 3/3.1 */
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FDK_FORMAT_7_1 = 12, /* 3/4.1 */
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FDK_FORMAT_22_2 = 13, /* 22.2 */
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FDK_FORMAT_5_2_1 = 14, /* 5/2.1*/
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FDK_FORMAT_5_5_2 = 15, /* 5/5.2 */
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FDK_FORMAT_9_1 = 16, /* 5/4.1 */
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FDK_FORMAT_6_5_1 = 17, /* 6/5.1 */
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FDK_FORMAT_6_7_1 = 18, /* 6/7.1 */
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FDK_FORMAT_5_6_1 = 19, /* 5/6.1 */
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FDK_FORMAT_7_6_1 = 20, /* 7/6.1 */
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FDK_FORMAT_IN_LISTOFCHANNELS = 21,
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FDK_FORMAT_OUT_LISTOFCHANNELS = 22,
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/* 20 formats + In & Out list of channels */
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FDK_NFORMATS = 23,
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FDK_FORMAT_FAIL = -1
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} FDK_converter_formatid_t;
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extern const INT format_nchan[FDK_NFORMATS + 9 - 2];
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2012-07-11 19:15:24 +02:00
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#endif
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