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, 276 insertions, 0 deletions

diff --git a/fdk-aac/libSBRenc/src/sbr_def.h b/fdk-aac/libSBRenc/src/sbr_def.h
new file mode 100644
index 0000000..53eba71
--- /dev/null
+++ b/fdk-aac/libSBRenc/src/sbr_def.h
@@ -0,0 +1,276 @@
+/* -----------------------------------------------------------------------------
+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 encoder library ******************************
+
+   Author(s):
+
+   Description:
+
+*******************************************************************************/
+
+/*!
+  \file
+  \brief  SBR main definitions $Revision: 92790 $
+*/
+#ifndef SBR_DEF_H
+#define SBR_DEF_H
+
+#include "common_fix.h"
+
+#define noError 0
+#define HANDLE_ERROR_INFO INT
+#define ERROR(a, b) 1
+
+/* #define SBR_ENV_STATISTICS_BITRATE */
+#undef SBR_ENV_STATISTICS_BITRATE
+
+/* #define SBR_ENV_STATISTICS */
+#undef SBR_ENV_STATISTICS
+
+/* #define SBR_PAYLOAD_MONITOR */
+#undef SBR_PAYLOAD_MONITOR
+
+#define SWAP(a, b) tempr = a, a = b, b = tempr
+#define TRUE 1
+#define FALSE 0
+
+/* Constants */
+#define EPS 1e-12
+#define LOG2 0.69314718056f /* natural logarithm of 2 */
+#define ILOG2 1.442695041f  /* 1/LOG2 */
+#define RELAXATION_FLOAT (1e-6f)
+#define RELAXATION (FL2FXCONST_DBL(RELAXATION_FLOAT))
+#define RELAXATION_FRACT \
+  (FL2FXCONST_DBL(0.524288f)) /* 0.524288f is fractional part of RELAXATION */
+#define RELAXATION_SHIFT (19)
+#define RELAXATION_LD64                                 \
+  (FL2FXCONST_DBL(0.31143075889f)) /* (ld64(RELAXATION) \
+                                    */
+
+/************  Definitions ***************/
+#define SBR_COMP_MODE_DELTA 0
+#define SBR_COMP_MODE_CTS 1
+#define SBR_MAX_ENERGY_VALUES 5
+#define SBR_GLOBAL_TONALITY_VALUES 2
+
+#define MAX_NUM_CHANNELS 2
+
+#define MAX_NOISE_ENVELOPES 2
+#define MAX_NUM_NOISE_COEFFS 5
+#define MAX_NUM_NOISE_VALUES (MAX_NUM_NOISE_COEFFS * MAX_NOISE_ENVELOPES)
+
+#define MAX_NUM_ENVELOPE_VALUES (MAX_ENVELOPES * MAX_FREQ_COEFFS)
+#define MAX_ENVELOPES 5
+#define MAX_FREQ_COEFFS 48
+
+#define MAX_FREQ_COEFFS_FS44100 35
+#define MAX_FREQ_COEFFS_FS48000 32
+
+#define NO_OF_ESTIMATES_LC 4
+#define NO_OF_ESTIMATES_LD 3
+#define MAX_NO_OF_ESTIMATES 4
+
+#define NOISE_FLOOR_OFFSET 6
+#define NOISE_FLOOR_OFFSET_64 (FL2FXCONST_DBL(0.09375f))
+
+#define LOW_RES 0
+#define HIGH_RES 1
+
+#define LO 0
+#define HI 1
+
+#define LENGTH_SBR_FRAME_INFO 35 /* 19 */
+
+#define SBR_NSFB_LOW_RES 9   /*  8 */
+#define SBR_NSFB_HIGH_RES 18 /* 16 */
+
+#define SBR_XPOS_CTRL_DEFAULT 2
+
+#define SBR_FREQ_SCALE_DEFAULT 2
+#define SBR_ALTER_SCALE_DEFAULT 1
+#define SBR_NOISE_BANDS_DEFAULT 2
+
+#define SBR_LIMITER_BANDS_DEFAULT 2
+#define SBR_LIMITER_GAINS_DEFAULT 2
+#define SBR_LIMITER_GAINS_INFINITE 3
+#define SBR_INTERPOL_FREQ_DEFAULT 1
+#define SBR_SMOOTHING_LENGTH_DEFAULT 0
+
+/* sbr_header */
+#define SI_SBR_AMP_RES_BITS 1
+#define SI_SBR_COUPLING_BITS 1
+#define SI_SBR_START_FREQ_BITS 4
+#define SI_SBR_STOP_FREQ_BITS 4
+#define SI_SBR_XOVER_BAND_BITS 3
+#define SI_SBR_RESERVED_BITS 2
+#define SI_SBR_DATA_EXTRA_BITS 1
+#define SI_SBR_HEADER_EXTRA_1_BITS 1
+#define SI_SBR_HEADER_EXTRA_2_BITS 1
+
+/* sbr_header extra 1 */
+#define SI_SBR_FREQ_SCALE_BITS 2
+#define SI_SBR_ALTER_SCALE_BITS 1
+#define SI_SBR_NOISE_BANDS_BITS 2
+
+/* sbr_header extra 2 */
+#define SI_SBR_LIMITER_BANDS_BITS 2
+#define SI_SBR_LIMITER_GAINS_BITS 2
+#define SI_SBR_INTERPOL_FREQ_BITS 1
+#define SI_SBR_SMOOTHING_LENGTH_BITS 1
+
+/* sbr_grid */
+#define SBR_CLA_BITS 2    /*!< size of bs_frame_class */
+#define SBR_CLA_BITS_LD 1 /*!< size of bs_frame_class */
+#define SBR_ENV_BITS 2    /*!< size of bs_num_env_raw */
+#define SBR_ABS_BITS 2    /*!< size of bs_abs_bord_raw for HE-AAC */
+#define SBR_NUM_BITS 2    /*!< size of bs_num_rel */
+#define SBR_REL_BITS 2    /*!< size of bs_rel_bord_raw */
+#define SBR_RES_BITS 1    /*!< size of bs_freq_res_flag */
+#define SBR_DIR_BITS 1    /*!< size of bs_df_flag */
+
+/* sbr_data */
+#define SI_SBR_INVF_MODE_BITS 2
+
+#define SI_SBR_START_ENV_BITS_AMP_RES_3_0 6
+#define SI_SBR_START_ENV_BITS_BALANCE_AMP_RES_3_0 5
+#define SI_SBR_START_NOISE_BITS_AMP_RES_3_0 5
+#define SI_SBR_START_NOISE_BITS_BALANCE_AMP_RES_3_0 5
+
+#define SI_SBR_START_ENV_BITS_AMP_RES_1_5 7
+#define SI_SBR_START_ENV_BITS_BALANCE_AMP_RES_1_5 6
+
+#define SI_SBR_EXTENDED_DATA_BITS 1
+#define SI_SBR_EXTENSION_SIZE_BITS 4
+#define SI_SBR_EXTENSION_ESC_COUNT_BITS 8
+#define SI_SBR_EXTENSION_ID_BITS 2
+
+#define SBR_EXTENDED_DATA_MAX_CNT (15 + 255)
+
+#define EXTENSION_ID_PS_CODING 2
+
+/* Envelope coding constants */
+#define FREQ 0
+#define TIME 1
+
+/* qmf data scaling */
+#define QMF_SCALE_OFFSET 7
+
+/* huffman tables */
+#define CODE_BOOK_SCF_LAV00 60
+#define CODE_BOOK_SCF_LAV01 31
+#define CODE_BOOK_SCF_LAV10 60
+#define CODE_BOOK_SCF_LAV11 31
+#define CODE_BOOK_SCF_LAV_BALANCE11 12
+#define CODE_BOOK_SCF_LAV_BALANCE10 24
+
+typedef enum { SBR_AMP_RES_1_5 = 0, SBR_AMP_RES_3_0 } AMP_RES;
+
+typedef enum {
+  XPOS_MDCT,
+  XPOS_MDCT_CROSS,
+  XPOS_LC,
+  XPOS_RESERVED,
+  XPOS_SWITCHED /* not a real choice but used here to control behaviour */
+} XPOS_MODE;
+
+typedef enum {
+  INVF_OFF = 0,
+  INVF_LOW_LEVEL,
+  INVF_MID_LEVEL,
+  INVF_HIGH_LEVEL,
+  INVF_SWITCHED /* not a real choice but used here to control behaviour */
+} INVF_MODE;
+
+#endif