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      1 
      2 /* -----------------------------------------------------------------------------------------------------------
      3 Software License for The Fraunhofer FDK AAC Codec Library for Android
      4 
      5  Copyright  1995 - 2013 Fraunhofer-Gesellschaft zur Frderung der angewandten Forschung e.V.
      6   All rights reserved.
      7 
      8  1.    INTRODUCTION
      9 The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements
     10 the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
     11 This FDK AAC Codec software is intended to be used on a wide variety of Android devices.
     12 
     13 AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual
     14 audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by
     15 independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
     16 of the MPEG specifications.
     17 
     18 Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer)
     19 may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners
     20 individually for the purpose of encoding or decoding bit streams in products that are compliant with
     21 the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license
     22 these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec
     23 software may already be covered under those patent licenses when it is used for those licensed purposes only.
     24 
     25 Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality,
     26 are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional
     27 applications information and documentation.
     28 
     29 2.    COPYRIGHT LICENSE
     30 
     31 Redistribution and use in source and binary forms, with or without modification, are permitted without
     32 payment of copyright license fees provided that you satisfy the following conditions:
     33 
     34 You must retain the complete text of this software license in redistributions of the FDK AAC Codec or
     35 your modifications thereto in source code form.
     36 
     37 You must retain the complete text of this software license in the documentation and/or other materials
     38 provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
     39 You must make available free of charge copies of the complete source code of the FDK AAC Codec and your
     40 modifications thereto to recipients of copies in binary form.
     41 
     42 The name of Fraunhofer may not be used to endorse or promote products derived from this library without
     43 prior written permission.
     44 
     45 You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec
     46 software or your modifications thereto.
     47 
     48 Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software
     49 and the date of any change. For modified versions of the FDK AAC Codec, the term
     50 "Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term
     51 "Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android."
     52 
     53 3.    NO PATENT LICENSE
     54 
     55 NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer,
     56 ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
     57 respect to this software.
     58 
     59 You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
     60 by appropriate patent licenses.
     61 
     62 4.    DISCLAIMER
     63 
     64 This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors
     65 "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties
     66 of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
     67 CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages,
     68 including but not limited to procurement of substitute goods or services; loss of use, data, or profits,
     69 or business interruption, however caused and on any theory of liability, whether in contract, strict
     70 liability, or tort (including negligence), arising in any way out of the use of this software, even if
     71 advised of the possibility of such damage.
     72 
     73 5.    CONTACT INFORMATION
     74 
     75 Fraunhofer Institute for Integrated Circuits IIS
     76 Attention: Audio and Multimedia Departments - FDK AAC LL
     77 Am Wolfsmantel 33
     78 91058 Erlangen, Germany
     79 
     80 www.iis.fraunhofer.de/amm
     81 amm-info (at) iis.fraunhofer.de
     82 ----------------------------------------------------------------------------------------------------------- */
     83 
     84 /*****************************  MPEG-4 AAC Decoder  **************************
     85 
     86    Author(s):   Christian Griebel
     87    Description: Dynamic range control (DRC) decoder tool for AAC
     88 
     89 ******************************************************************************/
     90 
     91 #ifndef AACDEC_DRC_H
     92 #define AACDEC_DRC_H
     93 
     94 #include "tp_data.h"            /* for program config element support */
     95 
     96 
     97 #include "aacdec_drc_types.h"
     98 #include "channel.h"
     99 #include "FDK_bitstream.h"
    100 
    101 #define AACDEC_DRC_DFLT_EXPIRY_FRAMES (  50 )   /* Default DRC data expiry time in AAC frames   */
    102 
    103 /**
    104  * \brief DRC module setting parameters
    105  */
    106 typedef enum
    107 {
    108   DRC_CUT_SCALE = 0,
    109   DRC_BOOST_SCALE,
    110   TARGET_REF_LEVEL,
    111   DRC_BS_DELAY,
    112   DRC_DATA_EXPIRY_FRAME,
    113   APPLY_NORMALIZATION,
    114   APPLY_HEAVY_COMPRESSION
    115 
    116 } AACDEC_DRC_PARAM;
    117 
    118 
    119 /**
    120  * \brief DRC module interface functions
    121  */
    122 void aacDecoder_drcInit (
    123         HANDLE_AAC_DRC  self );
    124 
    125 void aacDecoder_drcInitChannelData (
    126         CDrcChannelData *pDrcChannel );
    127 
    128 AAC_DECODER_ERROR aacDecoder_drcSetParam (
    129         HANDLE_AAC_DRC    self,
    130         AACDEC_DRC_PARAM  param,
    131         INT               value );
    132 
    133 int aacDecoder_drcMarkPayload (
    134         HANDLE_AAC_DRC  self,
    135         HANDLE_FDK_BITSTREAM  hBs,
    136         AACDEC_DRC_PAYLOAD_TYPE  type );
    137 
    138 int aacDecoder_drcProlog (
    139         HANDLE_AAC_DRC  self,
    140         HANDLE_FDK_BITSTREAM hBs,
    141         CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo[],
    142         UCHAR  pceInstanceTag,
    143         UCHAR  channelMapping[],
    144         int    numChannels );
    145 
    146 /**
    147  * \brief Apply DRC. If SBR is present, DRC data is handed over to the SBR decoder.
    148  * \param self AAC decoder instance
    149  * \param pSbrDec pointer to SBR decoder instance
    150  * \param pAacDecoderChannelInfo AAC decoder channel instance to be processed
    151  * \param pDrcDat DRC channel data
    152  * \param extGain Pointer to a FIXP_DBL where a externally applyable gain will be stored into (independently on whether it will be apply internally or not).
    153  *                At function call the buffer must hold the scale (0 >= scale < DFRACT_BITS) to be applied on the gain value.
    154  * \param ch channel index
    155  * \param aacFrameSize AAC frame size
    156  * \param bSbrPresent flag indicating that SBR is present, in which case DRC is handed over to the SBR instance pSbrDec
    157  */
    158 void aacDecoder_drcApply (
    159         HANDLE_AAC_DRC          self,
    160         void                   *pSbrDec,
    161         CAacDecoderChannelInfo *pAacDecoderChannelInfo,
    162         CDrcChannelData        *pDrcDat,
    163         FIXP_DBL               *extGain,
    164         int  ch,
    165         int  aacFrameSize,
    166         int  bSbrPresent );
    167 
    168 int aacDecoder_drcEpilog (
    169         HANDLE_AAC_DRC  self,
    170         HANDLE_FDK_BITSTREAM hBs,
    171         CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo[],
    172         UCHAR  pceInstanceTag,
    173         UCHAR  channelMapping[],
    174         int    validChannels );
    175 
    176 /**
    177  * \brief Get metadata information found in bitstream.
    178  * \param self DRC module instance handle.
    179  * \param pPresMode Pointer to field where the presentation mode will be written to.
    180  * \param pProgRefLevel Pointer to field where the program reference level will be written to.
    181  * \return Nothing.
    182  */
    183 void aacDecoder_drcGetInfo (
    184         HANDLE_AAC_DRC  self,
    185         SCHAR  *pPresMode,
    186         SCHAR  *pProgRefLevel );
    187 
    188 
    189 #endif  /* AACDEC_DRC_H */
    190