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, 202 insertions, 0 deletions

diff --git a/fdk-aac/libSYS/include/syslib_channelMapDescr.h b/fdk-aac/libSYS/include/syslib_channelMapDescr.h
new file mode 100644
index 0000000..375a24d
--- /dev/null
+++ b/fdk-aac/libSYS/include/syslib_channelMapDescr.h
@@ -0,0 +1,202 @@
+/* -----------------------------------------------------------------------------
+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
+----------------------------------------------------------------------------- */
+
+/************************* System integration library **************************
+
+   Author(s):   Thomas Dietzen
+
+   Description:
+
+*******************************************************************************/
+
+/** \file   syslib_channelMapDescr.h
+ *  \brief  Function and structure declarations for the channel map descriptor implementation.
+ */
+
+#ifndef SYSLIB_CHANNELMAPDESCR_H
+#define SYSLIB_CHANNELMAPDESCR_H
+
+#include "machine_type.h"
+
+/**
+ * \brief  Contains information needed for a single channel map.
+ */
+typedef struct {
+  const UCHAR*
+      pChannelMap; /*!< Actual channel mapping for one single configuration. */
+  UCHAR numChannels; /*!< The number of channels for the channel map which is
+                        the maximum used channel index+1. */
+} CHANNEL_MAP_INFO;
+
+/**
+ * \brief   This is the main data struct. It contains the mapping for all
+ * channel configurations such as administration information.
+ *
+ * CAUTION: Do not access this structure directly from a algorithm specific
+ * library. Always use one of the API access functions below!
+ */
+typedef struct {
+  const CHANNEL_MAP_INFO* pMapInfoTab; /*!< Table of channel maps. */
+  UINT mapInfoTabLen; /*!< Length of the channel map table array. */
+  UINT fPassThrough;  /*!< Flag that defines whether the specified mapping shall
+                         be applied  (value: 0) or the input just gets passed
+                         through (MPEG mapping). */
+} FDK_channelMapDescr;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief  Initialize a given channel map descriptor.
+ *
+ * \param  pMapDescr      Pointer to a channel map descriptor to be initialized.
+ * \param  pMapInfoTab    Table of channel maps to initizalize the descriptor
+ with.
+ *                        If a NULL pointer is given a default table for
+ WAV-like mapping will be used.
+ * \param  mapInfoTabLen  Length of the channel map table array (pMapInfoTab).
+ If a zero length is given a default table for WAV-like mapping will be used.
+ * \param  fPassThrough   If the flag is set the reordering (given by
+ pMapInfoTab) will be bypassed.
+ */
+void FDK_chMapDescr_init(FDK_channelMapDescr* const pMapDescr,
+                         const CHANNEL_MAP_INFO* const pMapInfoTab,
+                         const UINT mapInfoTabLen, const UINT fPassThrough);
+
+/**
+ * \brief  Change the channel reordering state of a given channel map
+ * descriptor.
+ *
+ * \param  pMapDescr     Pointer to a (initialized) channel map descriptor.
+ * \param  fPassThrough  If the flag is set the reordering (given by
+ * pMapInfoTab) will be bypassed.
+ * \return               Value unequal to zero if set operation was not
+ * successful. And zero on success.
+ */
+int FDK_chMapDescr_setPassThrough(FDK_channelMapDescr* const pMapDescr,
+                                  UINT fPassThrough);
+
+/**
+ * \brief  Get the mapping value for a specific channel and map index.
+ *
+ * \param  pMapDescr  Pointer to channel map descriptor.
+ * \param  chIdx      Channel index.
+ * \param  mapIdx     Mapping index (corresponding to the channel configuration
+ * index).
+ * \return            Mapping value.
+ */
+UCHAR FDK_chMapDescr_getMapValue(const FDK_channelMapDescr* const pMapDescr,
+                                 const UCHAR chIdx, const UINT mapIdx);
+
+/**
+ * \brief  Evaluate whether channel map descriptor is reasonable or not.
+ *
+ * \param  pMapDescr Pointer to channel map descriptor.
+ * \return           Value unequal to zero if descriptor is valid, otherwise
+ * zero.
+ */
+int FDK_chMapDescr_isValid(const FDK_channelMapDescr* const pMapDescr);
+
+/**
+ * Extra variables for setting up Wg4 channel mapping.
+ */
+extern const CHANNEL_MAP_INFO FDK_mapInfoTabWg4[];
+extern const UINT FDK_mapInfoTabLenWg4;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* !defined(SYSLIB_CHANNELMAPDESCR_H) */