/* ----------------------------------------------------------------------------- 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); #ifdef __cplusplus } #endif #endif /* !defined(SYSLIB_CHANNELMAPDESCR_H) */