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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):   Josef Hoepfl
     87    Description:
     88 
     89 ******************************************************************************/
     90 
     91 #ifndef AACDECODER_H
     92 #define AACDECODER_H
     93 
     94 #include "common_fix.h"
     95 
     96 #include "FDK_bitstream.h"
     97 
     98 #include "channel.h"
     99 
    100 #include "tpdec_lib.h"
    101 #include "FDK_audio.h"
    102 
    103 #include "block.h"
    104 
    105 #include "genericStds.h"
    106 
    107 
    108 #include "sbrdecoder.h"
    109 
    110 
    111 #include "aacdec_drc.h"
    112 
    113  #include "pcmutils_lib.h"
    114 
    115 
    116 /* Capabilities flags */
    117 #define CAPF_AAC_LC           0x00000001
    118 #define CAPF_AAC_LD           0x00000002
    119 #define CAPF_AAC_SCAL         0x00000004
    120 #define CAPF_AAC_ER           0x00000008
    121 #define CAPF_AAC_480          0x00000010
    122 #define CAPF_AAC_512          0x00000020
    123 #define CAPF_AAC_960          0x00000040
    124 #define CAPF_AAC_1024         0x00000080
    125 #define CAPF_AAC_HCR          0x00000100
    126 #define CAPF_AAC_VCB11        0x00000200
    127 #define CAPF_AAC_RVLC         0x00000400
    128 #define CAPF_AAC_MPEG4        0x00000800 /* PNS */
    129 #define CAPF_AAC_DRC          0x00001000
    130 #define CAPF_AAC_CONCEAL      0x00002000
    131 #define CAPF_AAC_DRM_BSFORMAT 0x00004000
    132 #define CAPF_AAC_BSAC         0x00008000
    133 
    134 typedef struct AAC_DECODER_INSTANCE *HANDLE_AACDECODER;
    135 
    136 
    137 enum
    138 {
    139   L = 0,
    140   R = 1
    141 };
    142 
    143 typedef struct {
    144     unsigned char *buffer;
    145     int bufferSize;
    146     int offset[8];
    147     int nrElements;
    148 } CAncData;
    149 
    150 typedef enum {
    151   NOT_DEFINED = -1,
    152   MODE_HQ     =  0,
    153   MODE_LP     =  1
    154 } QMF_MODE;
    155 
    156 typedef struct {
    157   int        bsDelay;
    158 } SBR_PARAMS;
    159 
    160 
    161 /* AAC decoder (opaque toward userland) struct declaration */
    162 struct AAC_DECODER_INSTANCE {
    163   INT                   aacChannels;                 /*!< Amount of AAC decoder channels allocated.        */
    164   INT                   ascChannels;                 /*!< Amount of AAC decoder channels signalled in ASC. */
    165   INT                   blockNumber;                 /*!< frame counter                                    */
    166 
    167   INT                   nrOfLayers;
    168 
    169   INT                   outputInterleaved;           /*!< PCM output format (interleaved/none interleaved). */
    170 
    171   HANDLE_TRANSPORTDEC   hInput;                      /*!< Transport layer handle. */
    172 
    173   SamplingRateInfo      samplingRateInfo;            /*!< Sampling Rate information table */
    174 
    175   UCHAR                 frameOK;                     /*!< Will be unset if a consistency check, e.g. CRC etc. fails */
    176 
    177   UINT                  flags;                       /*!< Flags for internal decoder use. DO NOT USE self::streaminfo::flags ! */
    178 
    179   MP4_ELEMENT_ID        elements[7]; /*!< Table where the element Id's are listed          */
    180   UCHAR                 elTags[7];   /*!< Table where the elements id Tags are listed      */
    181   UCHAR                 chMapping[(6)];   /*!< Table of MPEG canonical order to bitstream channel order mapping. */
    182 
    183   AUDIO_CHANNEL_TYPE    channelType[(6)];    /*!< Audio channel type of each output audio channel (from 0 upto numChannels).           */
    184   UCHAR                 channelIndices[(6)]; /*!< Audio channel index for each output audio channel (from 0 upto numChannels).         */
    185                                                              /* See ISO/IEC 13818-7:2005(E), 8.5.3.2 Explicit channel mapping using a program_config_element() */
    186 
    187 
    188   const UCHAR         (*channelOutputMapping)[8];    /*!< Table for MPEG canonical order to output channel order mapping. */
    189 
    190 
    191   CProgramConfig                pce;
    192   CStreamInfo                   streamInfo;         /*!< pointer to StreamInfo data (read from the bitstream) */
    193   CAacDecoderChannelInfo       *pAacDecoderChannelInfo[(6)];       /*!< Temporal channel memory */
    194   CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo[(6)]; /*!< Persistent channel memory */
    195 
    196   CAacDecoderCommonData         aacCommonData;             /*!< Temporal shared data for all channels hooked into pAacDecoderChannelInfo */
    197 
    198   CConcealParams                concealCommonData;
    199   INT   concealChannels;
    200 
    201 
    202   HANDLE_SBRDECODER   hSbrDecoder;                   /*!< SBR decoder handle.                        */
    203   UCHAR               sbrEnabled;                    /*!< flag to store if SBR has been detected     */
    204   UCHAR               sbrEnabledPrev;                /*!< flag to store if SBR has been detected from previous frame */
    205   UCHAR               psPossible;                    /*!< flag to store if PS is possible            */
    206   SBR_PARAMS          sbrParams;                     /*!< struct to store all sbr parameters         */
    207 
    208   QMF_MODE   qmfModeCurr;                            /*!< The current QMF mode                       */
    209   QMF_MODE   qmfModeUser;                            /*!< The QMF mode requested by the library user */
    210 
    211   HANDLE_AAC_DRC  hDrcInfo;                          /*!< handle to DRC data structure               */
    212 
    213 
    214   CAncData      ancData;                             /*!< structure to handle ancillary data         */
    215 
    216   HANDLE_PCM_DOWNMIX  hPcmUtils;                     /*!< privat data for the PCM utils.             */
    217 
    218 };
    219 
    220 
    221 #define AAC_DEBUG_EXTHLP "\
    222 --- AAC-Core ---\n\
    223     0x00010000 Header data\n\
    224     0x00020000 CRC data\n\
    225     0x00040000 Channel info\n\
    226     0x00080000 Section data\n\
    227     0x00100000 Scalefactor data\n\
    228     0x00200000 Pulse data\n\
    229     0x00400000 Tns data\n\
    230     0x00800000 Quantized spectrum\n\
    231     0x01000000 Requantized spectrum\n\
    232     0x02000000 Time output\n\
    233     0x04000000 Fatal errors\n\
    234     0x08000000 Buffer fullness\n\
    235     0x10000000 Average bitrate\n\
    236     0x20000000 Synchronization\n\
    237     0x40000000 Concealment\n\
    238     0x7FFF0000 all AAC-Core-Info\n\
    239 "
    240 
    241 /**
    242  * \brief Synchronise QMF mode for all modules using QMF data.
    243  * \param self decoder handle
    244  */
    245 void CAacDecoder_SyncQmfMode(HANDLE_AACDECODER self);
    246 
    247 /**
    248  * \brief Signal a bit stream interruption to the decoder
    249  * \param self decoder handle
    250  */
    251 void CAacDecoder_SignalInterruption(HANDLE_AACDECODER self);
    252 
    253 /*!
    254   \brief Initialize ancillary buffer
    255 
    256   \ancData Pointer to ancillary data structure
    257   \buffer Pointer to (external) anc data buffer
    258   \size Size of the buffer pointed on by buffer
    259 
    260   \return  Error code
    261 */
    262 AAC_DECODER_ERROR CAacDecoder_AncDataInit(CAncData *ancData, unsigned char *buffer, int size);
    263 
    264 /*!
    265   \brief Get one ancillary data element
    266 
    267   \ancData Pointer to ancillary data structure
    268   \index Index of the anc data element to get
    269   \ptr Pointer to a buffer receiving a pointer to the requested anc data element
    270   \size Pointer to a buffer receiving the length of the requested anc data element
    271 
    272   \return  Error code
    273 */
    274 AAC_DECODER_ERROR CAacDecoder_AncDataGet(CAncData *ancData, int index, unsigned char **ptr, int *size);
    275 
    276 
    277 /* initialization of aac decoder */
    278 LINKSPEC_H HANDLE_AACDECODER CAacDecoder_Open(TRANSPORT_TYPE bsFormat);
    279 
    280 /* Initialization of stream-info elements */
    281 LINKSPEC_H AAC_DECODER_ERROR CAacDecoder_Init(HANDLE_AACDECODER self,
    282                                               const CSAudioSpecificConfig *asc);
    283 
    284 /*!
    285   \brief Decodes one aac frame
    286 
    287   The function decodes one aac frame. The decoding of coupling channel
    288   elements are not supported. The transport layer might signal, that the
    289   data of the current frame is invalid, e.g. as a result of a packet
    290   loss in streaming mode.
    291   The bitstream position of transportDec_GetBitstream(self->hInput) must
    292   be exactly the end of the access unit, including all byte alignment bits.
    293   For this purpose, the variable auStartAnchor is used.
    294 
    295   \return  error status
    296 */
    297 LINKSPEC_H AAC_DECODER_ERROR CAacDecoder_DecodeFrame(
    298         HANDLE_AACDECODER self,
    299         const UINT flags,
    300         INT_PCM *pTimeData,
    301         const INT  timeDataSize,
    302         const INT interleaved
    303         );
    304 
    305 /* Destroy aac decoder */
    306 LINKSPEC_H void CAacDecoder_Close ( HANDLE_AACDECODER self );
    307 
    308 /* get streaminfo handle from decoder */
    309 LINKSPEC_H CStreamInfo* CAacDecoder_GetStreamInfo ( HANDLE_AACDECODER self );
    310 
    311 
    312 #endif /* #ifndef AACDECODER_H */
    313