libMpegTPDec/src/tpdec_latm.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.
  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
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  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@iis.fraunhofer.de
  82 ----------------------------------------------------------------------------------------------------------- */
  83
  84 /*****************************  MPEG-4 AAC Decoder  **************************
  85
  86    Author(s):   Daniel Homm
  87    Description:
  88
  89 ******************************************************************************/
  90
  91 #ifndef LATM_DEMUX_H
  92 #define LATM_DEMUX_H
  93
  94 #include "tpdec_lib.h"
  95
  96
  97 #include "FDK_bitstream.h"
  98
  99 #define MIN_LATM_HEADERLENGTH  9
 100 #define MIN_LOAS_HEADERLENGTH  MIN_LATM_HEADERLENGTH + 24   /* both in bits */
 101  #define MIN_TP_BUF_SIZE_LOAS   ( 8194 )
 102
 103 enum {
 104   LATM_MAX_PROG = 1,
 105   LATM_MAX_LAYER = 2,
 106   LATM_MAX_VAR_CHUNKS=16,
 107   LATM_MAX_ID=16
 108 };
 109
 110 typedef struct {
 111   UINT m_frameLengthType;
 112   UINT m_bufferFullness;
 113   UINT m_streamID;
 114   UINT m_frameLengthInBits;
 115 } LATM_LAYER_INFO;
 116
 117 typedef struct {
 118   LATM_LAYER_INFO m_linfo[LATM_MAX_PROG][LATM_MAX_LAYER];
 119   UINT m_taraBufferFullness;
 120   UINT m_otherDataLength;
 121   UINT m_audioMuxLengthBytes;          /* Length of LOAS payload */
 122
 123   UCHAR m_useSameStreamMux;
 124   UCHAR m_AudioMuxVersion;
 125   UCHAR m_AudioMuxVersionA;
 126   UCHAR m_allStreamsSameTimeFraming;
 127   UCHAR m_noSubFrames;
 128   UCHAR m_numProgram;
 129   UCHAR m_numLayer;
 130   UCHAR m_useSameConfig;
 131
 132   UCHAR m_otherDataPresent;
 133   UCHAR m_crcCheckPresent;
 134   UCHAR m_crcCheckSum;
 135
 136   SCHAR BufferFullnessAchieved;
 137 } CLatmDemux;
 138
 139 int CLatmDemux_ReadAuChunkLengthInfo(HANDLE_FDK_BITSTREAM bs);
 140
 141 TRANSPORTDEC_ERROR CLatmDemux_Read(
 142         HANDLE_FDK_BITSTREAM bs,
 143         CLatmDemux *pLatmDemux,
 144         TRANSPORT_TYPE tt,
 145         CSTpCallBacks *pTpDecCallbacks,
 146         CSAudioSpecificConfig *pAsc,
 147         int *pfConfigFound,
 148         const INT ignoreBufferFullness
 149         );
 150
 151 /**
 152  * \brief Read StreamMuxConfig
 153  * \param bs bit stream handle as data source
 154  * \param pLatmDemux pointer to CLatmDemux struct of current LATM context
 155  * \param pTpDecCallbacks Call back structure for configuration callbacks
 156  * \param pAsc pointer to a ASC for configuration storage
 157  * \param pfConfigFound pointer to a flag which is set to 1 if a configuration was found and processed successfully
 158  * \return error code
 159  */
 160 TRANSPORTDEC_ERROR CLatmDemux_ReadStreamMuxConfig(
 161         HANDLE_FDK_BITSTREAM bs,
 162         CLatmDemux *pLatmDemux,
 163         CSTpCallBacks *pTpDecCallbacks,
 164         CSAudioSpecificConfig *pAsc,
 165         int * pfConfigFound
 166         );
 167
 168 TRANSPORTDEC_ERROR CLatmDemux_ReadPayloadLengthInfo(HANDLE_FDK_BITSTREAM bs, CLatmDemux *pLatmDemux);
 169
 170 int  CLatmDemux_GetFrameLengthInBits(CLatmDemux *pLatmDemux);
 171 int  CLatmDemux_GetOtherDataPresentFlag(CLatmDemux *pLatmDemux);
 172 int  CLatmDemux_GetOtherDataLength(CLatmDemux *pLatmDemux);
 173 UINT CLatmDemux_GetNrOfSubFrames(CLatmDemux *pLatmDemux);
 174
 175
 176 #endif /* LATM_DEMUX_H */