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, 169 insertions, 0 deletions

diff --git a/fdk-aac/libAACenc/src/psy_const.h b/fdk-aac/libAACenc/src/psy_const.h
new file mode 100644
index 0000000..c3f3f64
--- /dev/null
+++ b/fdk-aac/libAACenc/src/psy_const.h
@@ -0,0 +1,169 @@
+/* -----------------------------------------------------------------------------
+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
+----------------------------------------------------------------------------- */
+
+/**************************** AAC encoder library ******************************
+
+   Author(s):   M.Werner
+
+   Description: Global psychoaccoustic constants
+
+*******************************************************************************/
+
+#ifndef PSY_CONST_H
+#define PSY_CONST_H
+
+#define TRUE 1
+#define FALSE 0
+
+#define TRANS_FAC 8 /* encoder short long ratio */
+
+#define FRAME_LEN_LONG_960    (960)
+#define FRAME_MAXLEN_SHORT ((1024) / TRANS_FAC)
+#define FRAME_LEN_SHORT_128 ((1024) / TRANS_FAC)
+#define FRAME_LEN_SHORT_120 (FRAME_LEN_LONG_960 / TRANS_FAC)
+
+/* Filterbank type*/
+enum FB_TYPE { FB_LC = 0, FB_LD = 1, FB_ELD = 2 };
+
+/* Block types */
+#define N_BLOCKTYPES 6
+enum {
+  LONG_WINDOW = 0,
+  START_WINDOW,
+  SHORT_WINDOW,
+  STOP_WINDOW,
+  _LOWOV_WINDOW, /* Do not use this block type out side of block_switch.cpp */
+  WRONG_WINDOW
+};
+
+/* Window shapes */
+enum {
+  SINE_WINDOW = 0,
+  KBD_WINDOW = 1,
+  LOL_WINDOW = 2 /* Low OverLap window shape for AAC-LD */
+};
+
+/*
+  MS stuff
+*/
+enum { SI_MS_MASK_NONE = 0, SI_MS_MASK_SOME = 1, SI_MS_MASK_ALL = 2 };
+
+#define MAX_NO_OF_GROUPS 4
+#define MAX_SFB_LONG                                                      \
+  51 /* 51 for a memory optimized implementation, maybe 64 for convenient \
+        debugging */
+#define MAX_SFB_SHORT                                                     \
+  15 /* 15 for a memory optimized implementation, maybe 16 for convenient \
+        debugging */
+
+#define MAX_SFB \
+  (MAX_SFB_SHORT > MAX_SFB_LONG ? MAX_SFB_SHORT : MAX_SFB_LONG) /* = 51 */
+#define MAX_GROUPED_SFB                            \
+  (MAX_NO_OF_GROUPS * MAX_SFB_SHORT > MAX_SFB_LONG \
+       ? MAX_NO_OF_GROUPS * MAX_SFB_SHORT          \
+       : MAX_SFB_LONG) /* = 60 */
+
+#define MAX_INPUT_BUFFER_SIZE (2 * (1024)) /* 2048 */
+
+#define PCM_LEVEL 1.0f
+#define NORM_PCM (PCM_LEVEL / 32768.0f)
+#define NORM_PCM_ENERGY (NORM_PCM * NORM_PCM)
+#define LOG_NORM_PCM -15
+
+#define TNS_PREDGAIN_SCALE (1000)
+
+#define LFE_LOWPASS_LINE 12
+#define LFE_LOWPASS_LINE_MIN 4
+
+#endif /* PSY_CONST_H */