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The Android Open Source Project
267
libFDK/include/FDK_tools_rom.h
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libFDK/include/FDK_tools_rom.h
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/* -----------------------------------------------------------------------------------------------------------
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Software License for The Fraunhofer FDK AAC Codec Library for Android
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<EFBFBD> Copyright 1995 - 2012 Fraunhofer-Gesellschaft zur F<>rderung der angewandten Forschung e.V.
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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 that implements
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the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
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This FDK AAC Codec software is intended to be used on 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 general perceptual
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audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by
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independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
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of the MPEG specifications.
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Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer)
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may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners
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individually for the purpose of encoding or decoding bit streams in products that are compliant with
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the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license
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these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec
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software may already be covered under those patent licenses when it is used for those licensed purposes only.
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Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality,
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are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional
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applications 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, are permitted without
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payment of copyright license fees provided that you satisfy the following conditions:
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You must retain the complete text of this software license in redistributions of the FDK AAC Codec or
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your modifications thereto in source code form.
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You must retain the complete text of this software license in the documentation and/or other materials
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provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
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You must make available free of 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 from this library without
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prior written permission.
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You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec
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software or your modifications thereto.
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Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software
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and the date of any change. For modified versions of the FDK AAC Codec, the term
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"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term
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"Third-Party Modified Version of the Fraunhofer FDK 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 limitation the patents of Fraunhofer,
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ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
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respect to this software.
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You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
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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 holders and contributors
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"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties
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of merchantability and 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, or consequential damages,
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including but not limited to procurement of substitute goods or services; loss of use, data, or profits,
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or business interruption, 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 this software, even if
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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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/*************************** Fraunhofer IIS FDK Tools ***********************
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Author(s): Oliver Moser
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Description: ROM tables used by FDK tools
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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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/* None radix2 rotation vectors */
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extern const FIXP_STB RotVectorReal60[60];
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extern const FIXP_STB RotVectorImag60[60];
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extern const FIXP_STB RotVectorReal240[240];
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extern const FIXP_STB RotVectorImag240[240];
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extern const FIXP_STB RotVectorReal480[480];
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extern const FIXP_STB RotVectorImag480[480];
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/* Regular sine tables */
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extern const FIXP_STP SineTable512[];
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extern const FIXP_STP SineTable480[];
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/* AAC-LC windows */
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extern const FIXP_WTP SineWindow1024[];
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extern const FIXP_WTP KBDWindow1024[];
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extern const FIXP_WTP SineWindow128[];
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extern const FIXP_WTP KBDWindow128[];
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extern const FIXP_WTP SineWindow960[];
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extern const FIXP_WTP KBDWindow960[];
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extern const FIXP_WTP SineWindow120[];
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extern const FIXP_WTP KBDWindow120[];
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/* AAC-LD windows */
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extern const FIXP_WTP SineWindow512[];
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#define LowOverlapWindow512 SineWindow128
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extern const FIXP_WTP SineWindow480[];
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#define LowOverlapWindow480 SineWindow120
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extern const FIXP_WTP SineWindow64[];
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extern const FIXP_WTP SineWindow32[];
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/**
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* \brief Helper table for window slope mapping. You should prefer the usage of the
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* function FDKgetWindowSlope(), this table is only made public for some optimized
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* access inside dct.cpp.
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*/
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extern const FIXP_WTP *const windowSlopes[2][3][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: Kaiser-Bessel. Any other
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* value is applied a mask of 1 to, mapping it to either 0 or 1.
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* \param Pointer to window slope or NULL if the requested window slope is not 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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#else
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#define FIXP_PFT FIXP_DBL
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#define FIXP_QTW FIXP_DBL
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#endif
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#define QMF640_PFT_TABLE_SIZE (640/2 + QMF_NO_POLY)
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extern const FIXP_QTW qmf_phaseshift_cos32[32];
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extern const FIXP_QTW qmf_phaseshift_sin32[32];
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extern const FIXP_QTW qmf_phaseshift_cos64[64];
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extern const FIXP_QTW qmf_phaseshift_sin64[64];
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extern const FIXP_PFT qmf_64[QMF640_PFT_TABLE_SIZE+QMF_NO_POLY];
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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[32];
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extern const FIXP_QTW qmf_phaseshift_sin32_cldfb[32];
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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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extern const FIXP_PFT qmf_cldfb_640[QMF640_CLDFB_PFT_TABLE_SIZE];
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extern const FIXP_PFT qmf_cldfb_320[QMF320_CLDFB_PFT_TABLE_SIZE];
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/*
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* Raw Data Block list stuff.
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*/
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typedef enum {
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element_instance_tag,
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common_window,
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global_gain,
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ics_info, /* ics_reserved_bit, window_sequence, window_shape, max_sfb, scale_factor_grouping, predictor_data_present, ltp_data_present, ltp_data */
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max_sfb,
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ms, /* ms_mask_present, ms_used */
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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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core_mode,
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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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/* 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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* \return element_list_t parser guidance structure.
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*/
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const element_list_t * getBitstreamElementList(AUDIO_OBJECT_TYPE aot, SCHAR epConfig, UCHAR nChannels, UCHAR layer);
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#endif
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