Include patched FDK-AAC in the repository

The initial idea was to get the DAB+ patch into upstream, but since
that follows the android source releases, there is no place for a custom
DAB+ patch there.

So instead of having to maintain a patched fdk-aac that has to have the
same .so version as the distribution package on which it is installed,
we prefer having a separate fdk-aac-dab library to avoid collision.

At that point, there's no reason to keep fdk-aac in a separate
repository, as odr-audioenc is the only tool that needs DAB+ encoding
support. Including it here simplifies installation, and makes it
consistent with toolame-dab, also shipped in this repository.

DAB+ decoding support (needed by ODR-SourceCompanion, dablin, etisnoop,
welle.io and others) can be done using upstream FDK-AAC.

1 files changed, 216 insertions, 0 deletions

diff --git a/fdk-aac/libSBRdec/src/sbr_rom.h b/fdk-aac/libSBRdec/src/sbr_rom.h
new file mode 100644
index 0000000..039743c
--- /dev/null
+++ b/fdk-aac/libSBRdec/src/sbr_rom.h
@@ -0,0 +1,216 @@
+/* -----------------------------------------------------------------------------
+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 Declaration of constant tables
+*/
+#ifndef SBR_ROM_H
+#define SBR_ROM_H
+
+#include "sbrdecoder.h"
+#include "env_extr.h"
+#include "qmf.h"
+
+#define INV_INT_TABLE_SIZE 49
+#define SBR_NF_NO_RANDOM_VAL \
+  512 /*!< Size of random number array for noise floor */
+
+/*
+  Frequency scales
+*/
+
+/* if defined(SBRDEC_RATIO_16_64_ENABLE) ((4) = 4) else ((4) = 2) */
+extern const UCHAR FDK_sbrDecoder_sbr_start_freq_16[(4) / 2][16];
+extern const UCHAR FDK_sbrDecoder_sbr_start_freq_22[(4) / 2][16];
+extern const UCHAR FDK_sbrDecoder_sbr_start_freq_24[(4) / 2][16];
+extern const UCHAR FDK_sbrDecoder_sbr_start_freq_32[(4) / 2][16];
+extern const UCHAR FDK_sbrDecoder_sbr_start_freq_40[(4) / 2][16];
+extern const UCHAR FDK_sbrDecoder_sbr_start_freq_44[(4) / 2][16];
+extern const UCHAR FDK_sbrDecoder_sbr_start_freq_48[(4) / 2][16];
+extern const UCHAR FDK_sbrDecoder_sbr_start_freq_64[(4) / 2][16];
+extern const UCHAR FDK_sbrDecoder_sbr_start_freq_88[(4) / 2][16];
+extern const UCHAR FDK_sbrDecoder_sbr_start_freq_192[16];
+extern const UCHAR FDK_sbrDecoder_sbr_start_freq_176[16];
+extern const UCHAR FDK_sbrDecoder_sbr_start_freq_128[16];
+
+/*
+  Low-Power-Profile Transposer
+*/
+#define NUM_WHFACTOR_TABLE_ENTRIES 9
+extern const USHORT
+    FDK_sbrDecoder_sbr_whFactorsIndex[NUM_WHFACTOR_TABLE_ENTRIES];
+extern const FIXP_DBL
+    FDK_sbrDecoder_sbr_whFactorsTable[NUM_WHFACTOR_TABLE_ENTRIES][6];
+
+/*
+  Envelope Adjustor
+*/
+extern const FIXP_SGL FDK_sbrDecoder_sbr_limGains_m[4];
+extern const UCHAR FDK_sbrDecoder_sbr_limGains_e[4];
+extern const FIXP_SGL FDK_sbrDecoder_sbr_limGainsPvc_m[4];
+extern const UCHAR FDK_sbrDecoder_sbr_limGainsPvc_e[4];
+extern const FIXP_SGL FDK_sbrDecoder_sbr_limiterBandsPerOctaveDiv4[4];
+extern const FIXP_DBL FDK_sbrDecoder_sbr_limiterBandsPerOctaveDiv4_DBL[4];
+extern const FIXP_SGL FDK_sbrDecoder_sbr_smoothFilter[4];
+extern const FIXP_SGL FDK_sbrDecoder_sbr_randomPhase[SBR_NF_NO_RANDOM_VAL][2];
+
+/*
+  Envelope Extractor
+*/
+extern const int FDK_sbrDecoder_envelopeTable_8[8][5];
+extern const int FDK_sbrDecoder_envelopeTable_15[15][6];
+extern const int FDK_sbrDecoder_envelopeTable_16[16][6];
+extern const FRAME_INFO FDK_sbrDecoder_sbr_frame_info1_15;
+extern const FRAME_INFO FDK_sbrDecoder_sbr_frame_info2_15;
+extern const FRAME_INFO FDK_sbrDecoder_sbr_frame_info4_15;
+extern const FRAME_INFO FDK_sbrDecoder_sbr_frame_info8_15;
+extern const FRAME_INFO FDK_sbrDecoder_sbr_frame_info1_16;
+extern const FRAME_INFO FDK_sbrDecoder_sbr_frame_info2_16;
+extern const FRAME_INFO FDK_sbrDecoder_sbr_frame_info4_16;
+extern const FRAME_INFO FDK_sbrDecoder_sbr_frame_info8_16;
+
+extern const SCHAR FDK_sbrDecoder_sbr_huffBook_EnvLevel10T[120][2];
+extern const SCHAR FDK_sbrDecoder_sbr_huffBook_EnvLevel10F[120][2];
+extern const SCHAR FDK_sbrDecoder_sbr_huffBook_EnvBalance10T[48][2];
+extern const SCHAR FDK_sbrDecoder_sbr_huffBook_EnvBalance10F[48][2];
+extern const SCHAR FDK_sbrDecoder_sbr_huffBook_EnvLevel11T[62][2];
+extern const SCHAR FDK_sbrDecoder_sbr_huffBook_EnvLevel11F[62][2];
+extern const SCHAR FDK_sbrDecoder_sbr_huffBook_EnvBalance11T[24][2];
+extern const SCHAR FDK_sbrDecoder_sbr_huffBook_EnvBalance11F[24][2];
+extern const SCHAR FDK_sbrDecoder_sbr_huffBook_NoiseLevel11T[62][2];
+extern const SCHAR FDK_sbrDecoder_sbr_huffBook_NoiseBalance11T[24][2];
+
+/*
+ Parametric stereo
+*/
+
+/* FIX_BORDER can have 0, 1, 2, 4 envelops */
+extern const UCHAR FDK_sbrDecoder_aFixNoEnvDecode[4];
+
+/* IID & ICC Huffman codebooks */
+extern const SCHAR aBookPsIidTimeDecode[28][2];
+extern const SCHAR aBookPsIidFreqDecode[28][2];
+extern const SCHAR aBookPsIccTimeDecode[14][2];
+extern const SCHAR aBookPsIccFreqDecode[14][2];
+
+/* IID-fine Huffman codebooks */
+
+extern const SCHAR aBookPsIidFineTimeDecode[60][2];
+extern const SCHAR aBookPsIidFineFreqDecode[60][2];
+
+/* the values of the following 3 tables are shiftet right by 1 ! */
+extern const FIXP_DBL ScaleFactors[NO_IID_LEVELS];
+extern const FIXP_DBL ScaleFactorsFine[NO_IID_LEVELS_FINE];
+extern const FIXP_DBL Alphas[NO_ICC_LEVELS];
+
+extern const UCHAR bins2groupMap20[NO_IID_GROUPS];
+extern const UCHAR FDK_sbrDecoder_aNoIidBins[3];
+extern const UCHAR FDK_sbrDecoder_aNoIccBins[3];
+
+/* Lookup tables for some arithmetic functions */
+
+#define INV_TABLE_BITS 8
+#define INV_TABLE_SIZE (1 << INV_TABLE_BITS)
+extern const FIXP_SGL FDK_sbrDecoder_invTable[INV_TABLE_SIZE];
+
+#endif  // SBR_ROM_H