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      1 
      2 /* -----------------------------------------------------------------------------------------------------------
      3 Software License for The Fraunhofer FDK AAC Codec Library for Android
      4 
      5  Copyright  1995 - 2012 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 /**********************  Fraunhofer IIS FDK AAC Encoder lib  ******************
     85 
     86    Author(s): M. Neusinger
     87    Description: Compressor for AAC Metadata Generator
     88 
     89 ******************************************************************************/
     90 
     91 #ifndef _METADATA_COMPRESSOR_H
     92 #define _METADATA_COMPRESSOR_H
     93 
     94 
     95 #include "FDK_audio.h"
     96 #include "common_fix.h"
     97 
     98 #include "aacenc.h"
     99 
    100 
    101 /**
    102  *  DRC compression profiles.
    103  */
    104 typedef enum DRC_PROFILE {
    105   DRC_NONE          = 0,
    106   DRC_FILMSTANDARD  = 1,
    107   DRC_FILMLIGHT     = 2,
    108   DRC_MUSICSTANDARD = 3,
    109   DRC_MUSICLIGHT    = 4,
    110   DRC_SPEECH        = 5,
    111   DRC_DELAY_TEST    = 6
    112 
    113 } DRC_PROFILE;
    114 
    115 
    116 /**
    117  *  DRC Compressor handle.
    118  */
    119 typedef struct DRC_COMP  DRC_COMP, *HDRC_COMP;
    120 
    121 /**
    122  * \brief  Open a DRC Compressor instance.
    123  *
    124  * Allocate memory for a compressor instance.
    125  *
    126  * \param phDrcComp             A pointer to a compressor handle. Initialized on return.
    127  *
    128  * \return
    129  *          - 0, on succes.
    130  *          - unequal 0, on failure.
    131  */
    132 INT FDK_DRC_Generator_Open(
    133         HDRC_COMP                      *phDrcComp
    134         );
    135 
    136 
    137 /**
    138  * \brief  Close the DRC Compressor instance.
    139  *
    140  * Deallocate instance and free whole memory.
    141  *
    142  * \param phDrcComp             Pointer to the compressor handle to be deallocated.
    143  *
    144  * \return
    145  *          - 0, on succes.
    146  *          - unequal 0, on failure.
    147  */
    148 INT FDK_DRC_Generator_Close(
    149         HDRC_COMP                      *phDrcComp
    150         );
    151 
    152 /**
    153  * \brief  Configure DRC Compressor.
    154  *
    155  * \param drcComp               Compressor handle.
    156  * \param profileLine           DRC profile for line mode.
    157  * \param profileRF             DRC profile for RF mode.
    158  * \param blockLength           Length of processing block in samples per channel.
    159  * \param sampleRate            Sampling rate in Hz.
    160  * \param channelMode           Channel configuration.
    161  * \param channelOrder          Channel order, MPEG or WAV.
    162  * \param useWeighting          Use weighting filter for loudness calculation
    163  *
    164  * \return
    165  *          - 0, on success,
    166  *          - unequal 0, on failure
    167  */
    168 INT FDK_DRC_Generator_Initialize(
    169         HDRC_COMP                       drcComp,
    170         const DRC_PROFILE               profileLine,
    171         const DRC_PROFILE               profileRF,
    172         const INT                       blockLength,
    173         const UINT                      sampleRate,
    174         const CHANNEL_MODE              channelMode,
    175         const CHANNEL_ORDER             channelOrder,
    176         const UCHAR                     useWeighting
    177         );
    178 
    179 /**
    180  * \brief  Calculate DRC Compressor Gain.
    181  *
    182  * \param drcComp               Compressor handle.
    183  * \param inSamples             Pointer to interleaved input audio samples.
    184  * \param dialnorm              Dialog Level in dB (typically -31...-1).
    185  * \param drc_TargetRefLevel
    186  * \param comp_TargetRefLevel
    187  * \param clev                  Downmix center mix factor (typically 0.707, 0.595 or 0.5)
    188  * \param slev                  Downmix surround mix factor (typically 0.707, 0.5, or 0)
    189  * \param dynrng                Pointer to variable receiving line mode DRC gain in dB
    190  * \param compr                 Pointer to variable receiving RF mode DRC gain in dB
    191  *
    192  * \return
    193  *          - 0, on success,
    194  *          - unequal 0, on failure
    195  */
    196 INT FDK_DRC_Generator_Calc(
    197         HDRC_COMP                       drcComp,
    198         const INT_PCM * const           inSamples,
    199         const INT                       dialnorm,
    200         const INT                       drc_TargetRefLevel,
    201         const INT                       comp_TargetRefLevel,
    202         FIXP_DBL                        clev,
    203         FIXP_DBL                        slev,
    204         INT * const                     dynrng,
    205         INT * const                     compr
    206         );
    207 
    208 
    209 /**
    210  * \brief  Configure DRC Compressor Profile.
    211  *
    212  * \param drcComp               Compressor handle.
    213  * \param profileLine           DRC profile for line mode.
    214  * \param profileRF             DRC profile for RF mode.
    215  *
    216  * \return
    217  *          - 0, on success,
    218  *          - unequal 0, on failure
    219  */
    220 INT FDK_DRC_Generator_setDrcProfile(
    221         HDRC_COMP                       drcComp,
    222         const DRC_PROFILE               profileLine,
    223         const DRC_PROFILE               profileRF
    224         );
    225 
    226 
    227 /**
    228  * \brief  Get DRC profile for line mode.
    229  *
    230  * \param drcComp               Compressor handle.
    231  *
    232  * \return  Current Profile.
    233  */
    234 DRC_PROFILE FDK_DRC_Generator_getDrcProfile(
    235         const HDRC_COMP                 drcComp
    236         );
    237 
    238 
    239 /**
    240  * \brief  Get DRC profile for RF mode.
    241  *
    242  * \param drcComp               Compressor handle.
    243  *
    244  * \return  Current Profile.
    245  */
    246 DRC_PROFILE FDK_DRC_Generator_getCompProfile(
    247         const HDRC_COMP                 drcComp
    248         );
    249 
    250 
    251 #endif /* _METADATA_COMPRESSOR_H */
    252 
    253