/* -----------------------------------------------------------------------------
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Software License for The Fraunhofer FDK AAC Codec Library for Android
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© Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
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Forschung e.V. All rights reserved.
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1. INTRODUCTION
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The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
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that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
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scheme for digital audio. This FDK AAC Codec software is intended to be used on
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a wide variety of Android devices.
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AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
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general perceptual audio codecs. AAC-ELD is considered the best-performing
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full-bandwidth communications codec by independent studies and is widely
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deployed. AAC has been standardized by ISO and IEC as part of the MPEG
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specifications.
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Patent licenses for necessary patent claims for the FDK AAC Codec (including
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those of Fraunhofer) may be obtained through Via Licensing
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(www.vialicensing.com) or through the respective patent owners individually for
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the purpose of encoding or decoding bit streams in products that are compliant
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with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
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Android devices already license these patent claims through Via Licensing or
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directly from the patent owners, and therefore FDK AAC Codec software may
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already be covered under those patent licenses when it is used for those
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licensed purposes only.
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Commercially-licensed AAC software libraries, including floating-point versions
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with enhanced sound quality, are also available from Fraunhofer. Users are
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encouraged to check the Fraunhofer website for additional applications
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information and documentation.
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2. COPYRIGHT LICENSE
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Redistribution and use in source and binary forms, with or without modification,
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are permitted without payment of copyright license fees provided that you
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satisfy the following conditions:
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You must retain the complete text of this software license in redistributions of
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the FDK AAC Codec or your modifications thereto in source code form.
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You must retain the complete text of this software license in the documentation
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and/or other materials provided with redistributions of the FDK AAC Codec or
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your modifications thereto in binary form. You must make available free of
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charge copies of the complete source code of the FDK AAC Codec and your
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modifications thereto to recipients of copies in binary form.
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The name of Fraunhofer may not be used to endorse or promote products derived
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from this library without prior written permission.
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You may not charge copyright license fees for anyone to use, copy or distribute
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the FDK AAC Codec software or your modifications thereto.
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Your modified versions of the FDK AAC Codec must carry prominent notices stating
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that you changed the software and the date of any change. For modified versions
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of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
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must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
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AAC Codec Library for Android."
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3. NO PATENT LICENSE
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NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
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limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
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Fraunhofer provides no warranty of patent non-infringement with respect to this
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software.
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You may use this FDK AAC Codec software or modifications thereto only for
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purposes that are authorized by appropriate patent licenses.
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4. DISCLAIMER
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This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
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holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
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including but not limited to the implied warranties of merchantability and
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fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
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or consequential damages, including but not limited to procurement of substitute
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goods or services; loss of use, data, or profits, or business interruption,
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however caused and on any theory of liability, whether in contract, strict
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liability, or tort (including negligence), arising in any way out of the use of
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this software, even if advised of the possibility of such damage.
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5. CONTACT INFORMATION
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Fraunhofer Institute for Integrated Circuits IIS
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Attention: Audio and Multimedia Departments - FDK AAC LL
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Am Wolfsmantel 33
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91058 Erlangen, Germany
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www.iis.fraunhofer.de/amm
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amm-info@iis.fraunhofer.de
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----------------------------------------------------------------------------- */
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/**************************** AAC decoder library ******************************
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Author(s): Christian Griebel
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Description: Dynamic range control (DRC) global data types
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*******************************************************************************/
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#ifndef AACDEC_DRC_TYPES_H
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#define AACDEC_DRC_TYPES_H
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#include "common_fix.h"
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#define MAX_DRC_THREADS \
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((8) + 1) /* Heavy compression value is handled just like MPEG DRC data */
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#define MAX_DRC_BANDS (16) /* 2^LEN_DRC_BAND_INCR (LEN_DRC_BAND_INCR = 4) */
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/**
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* \brief DRC module global data types
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*/
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typedef enum {
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UNKNOWN_PAYLOAD = 0,
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MPEG_DRC_EXT_DATA = 1,
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DVB_DRC_ANC_DATA = 2
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} AACDEC_DRC_PAYLOAD_TYPE;
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/**
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* \brief Options for parameter handling / presentation mode
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*/
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typedef enum {
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DISABLED_PARAMETER_HANDLING = -1, /*!< DRC parameter handling disabled, all
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parameters are applied as requested. */
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ENABLED_PARAMETER_HANDLING =
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0, /*!< Apply changes to requested DRC parameters to prevent clipping */
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DRC_PRESENTATION_MODE_1 = 1, /*!< DRC Presentation mode 1*/
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DRC_PRESENTATION_MODE_2 = 2 /*!< DRC Presentation mode 2*/
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} AACDEC_DRC_PARAMETER_HANDLING;
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typedef struct {
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UINT expiryCount;
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UINT numBands;
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USHORT bandTop[MAX_DRC_BANDS];
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SHORT drcInterpolationScheme;
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UCHAR drcValue[MAX_DRC_BANDS];
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SCHAR drcDataType;
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} CDrcChannelData;
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typedef struct {
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UINT excludedChnsMask;
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SCHAR progRefLevel;
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SCHAR presMode; /* Presentation mode: 0 (not indicated), 1, 2, and 3
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(reserved). */
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SCHAR pceInstanceTag;
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CDrcChannelData channelData;
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} CDrcPayload;
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typedef struct {
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/* DRC parameters: Latest user requests */
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FIXP_DBL usrCut;
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FIXP_DBL usrBoost;
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UCHAR usrApplyHeavyCompression;
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/* DRC parameters: Currently used, possibly changed by
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* aacDecoder_drcParameterHandling */
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FIXP_DBL cut; /* attenuation scale factor */
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FIXP_DBL boost; /* boost scale factor */
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SCHAR targetRefLevel; /* target reference level for loudness normalization */
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UCHAR applyHeavyCompression; /* heavy compression (DVB) flag */
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UINT expiryFrame;
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UCHAR bsDelayEnable;
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UCHAR applyDigitalNorm;
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AACDEC_DRC_PARAMETER_HANDLING defaultPresentationMode;
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UCHAR encoderTargetLevel;
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} CDrcParams;
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typedef struct {
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CDrcParams
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params; /* Module parameters that can be set by user (via SetParam API
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function) */
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UCHAR enable; /* Switch that controls dynamic range processing */
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UCHAR digitalNorm; /* Switch to en-/disable reference level normalization in
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digital domain */
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UCHAR update; /* Flag indicating the change of a user or bitstream parameter
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which affects aacDecoder_drcParameterHandling */
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INT numOutChannels; /* Number of output channels */
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INT prevAacNumChannels; /* Previous number of channels of aac bitstream, used
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for update flag */
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USHORT numPayloads; /* The number of DRC data payload elements found within
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frame */
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USHORT
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numThreads; /* The number of DRC data threads extracted from the found
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payload elements */
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SCHAR progRefLevel; /* Program reference level for all channels */
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UCHAR progRefLevelPresent; /* Program reference level found in bitstream */
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UINT prlExpiryCount; /* Counter that can be used to monitor the life time of
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the program reference level. */
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SCHAR presMode; /* Presentation mode as defined in ETSI TS 101 154 */
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UCHAR dvbAncDataAvailable; /* Flag that indicates whether DVB ancillary data
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is present or not */
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UINT dvbAncDataPosition; /* Used to store the DVB ancillary data payload
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position in the bitstream (only one per frame) */
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UINT drcPayloadPosition[MAX_DRC_THREADS]; /* Used to store the DRC payload
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positions in the bitstream */
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UCHAR
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uniDrcPrecedence; /* Flag for signalling that uniDrc is active and takes
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precedence over legacy DRC */
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} CDrcInfo;
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typedef CDrcInfo *HANDLE_AAC_DRC;
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#endif /* AACDEC_DRC_TYPES_H */
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