libAACdec/src/conceal.h

   1
   2 /* -----------------------------------------------------------------------------------------------------------
   3 Software License for The Fraunhofer FDK AAC Codec Library for Android
   4
   5 © Copyright  1995 - 2013 Fraunhofer-Gesellschaft zur Förderung 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
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  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:
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  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.
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  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.
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  42 The name of Fraunhofer may not be used to endorse or promote products derived from this library without
  43 prior written permission.
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  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.
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  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."
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  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.
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  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
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  70 liability, or tort (including negligence), arising in any way out of the use of this software, even if
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  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@iis.fraunhofer.de
  82 ----------------------------------------------------------------------------------------------------------- */
  83
  84 /*****************************  MPEG-4 AAC Decoder  **************************
  85
  86    Author(s):   Josef Hoepfl
  87    Description: independent channel concealment
  88
  89 ******************************************************************************/
  90
  91 #ifndef _CONCEAL_H_
  92 #define _CONCEAL_H_
  93
  94 #include "aacdecoder_lib.h"
  95
  96 #include "channelinfo.h"
  97
  98 #define AACDEC_CONCEAL_PARAM_NOT_SPECIFIED ( 0xFFFE )
  99
 100 void CConcealment_InitCommonData  (CConcealParams   *pConcealCommonData);
 101
 102 void CConcealment_InitChannelData (CConcealmentInfo *hConcealmentInfo,
 103                                    CConcealParams   *pConcealCommonData,
 104                                    int  samplesPerFrame);
 105
 106 CConcealmentMethod
 107      CConcealment_GetMethod       (CConcealParams *pConcealCommonData);
 108
 109 UINT
 110   CConcealment_GetDelay           (CConcealParams *pConcealCommonData);
 111
 112 AAC_DECODER_ERROR
 113      CConcealment_SetParams       (CConcealParams *concealParams,
 114                                    int  method,
 115                                    int  fadeOutSlope,
 116                                    int  fadeInSlope,
 117                                    int  muteRelease,
 118                                    int  comfNoiseLevel);
 119
 120 CConcealmentState
 121      CConcealment_GetState        (CConcealmentInfo *hConcealmentInfo);
 122
 123 AAC_DECODER_ERROR
 124      CConcealment_SetAttenuation  (CConcealParams *concealParams,
 125                                    SHORT *fadeOutAttenuationVector,
 126                                    SHORT *fadeInAttenuationVector);
 127
 128 void CConcealment_Store           (CConcealmentInfo *hConcealmentInfo,
 129                                    CAacDecoderChannelInfo *pAacDecoderChannelInfo,
 130                                    CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo );
 131
 132 int  CConcealment_Apply           (CConcealmentInfo *hConcealmentInfo,
 133                                    CAacDecoderChannelInfo *pAacDecoderChannelInfo,
 134                                    CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo,
 135                                    const SamplingRateInfo *pSamplingRateInfo,
 136                                    const int samplesPerFrame,
 137                                    const UCHAR lastLpdMode,
 138                                    const int FrameOk,
 139                                    const UINT flags);
 140
 141 FIXP_DBL
 142      CConcealment_GetFadeFactor   (CConcealmentInfo *hConcealmentInfo,
 143                                    const int fPreviousFactor);
 144
 145 int  CConcealment_GetLastFrameOk  (CConcealmentInfo *hConcealmentInfo,
 146                                    const int fBeforeApply);
 147
 148 #endif /* #ifndef _CONCEAL_H_ */