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      1 
      2 /* -----------------------------------------------------------------------------------------------------------
      3 Software License for The Fraunhofer FDK AAC Codec Library for Android
      4 
      5  Copyright  1995 - 2015 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  #include "limiter.h"
    115 
    116 
    117 /* Capabilities flags */
    118 #define CAPF_AAC_LC           0x00000001
    119 #define CAPF_AAC_LD           0x00000002
    120 #define CAPF_AAC_SCAL         0x00000004
    121 #define CAPF_AAC_ER           0x00000008
    122 #define CAPF_AAC_480          0x00000010
    123 #define CAPF_AAC_512          0x00000020
    124 #define CAPF_AAC_960          0x00000040
    125 #define CAPF_AAC_1024         0x00000080
    126 #define CAPF_AAC_HCR          0x00000100
    127 #define CAPF_AAC_VCB11        0x00000200
    128 #define CAPF_AAC_RVLC         0x00000400
    129 #define CAPF_AAC_MPEG4        0x00000800 /* PNS */
    130 #define CAPF_AAC_DRC          0x00001000
    131 #define CAPF_AAC_CONCEAL      0x00002000
    132 #define CAPF_AAC_DRM_BSFORMAT 0x00004000
    133 #define CAPF_AAC_BSAC         0x00008000
    134 
    135 typedef struct AAC_DECODER_INSTANCE *HANDLE_AACDECODER;
    136 
    137 
    138 enum
    139 {
    140   L = 0,
    141   R = 1
    142 };
    143 
    144 typedef struct {
    145     unsigned char *buffer;
    146     int bufferSize;
    147     int offset[8];
    148     int nrElements;
    149 } CAncData;
    150 
    151 typedef enum {
    152   NOT_DEFINED = -1,
    153   MODE_HQ     =  0,
    154   MODE_LP     =  1
    155 } QMF_MODE;
    156 
    157 typedef struct {
    158   int        bsDelay;
    159 } SBR_PARAMS;
    160 
    161 
    162 /* AAC decoder (opaque toward userland) struct declaration */
    163 struct AAC_DECODER_INSTANCE {
    164   INT                   aacChannels;                 /*!< Amount of AAC decoder channels allocated.        */
    165   INT                   ascChannels;                 /*!< Amount of AAC decoder channels signalled in ASC. */
    166   INT                   blockNumber;                 /*!< frame counter                                    */
    167 
    168   INT                   nrOfLayers;
    169 
    170   INT                   outputInterleaved;           /*!< PCM output format (interleaved/none interleaved). */
    171 
    172   HANDLE_TRANSPORTDEC   hInput;                      /*!< Transport layer handle. */
    173 
    174   SamplingRateInfo      samplingRateInfo;            /*!< Sampling Rate information table */
    175 
    176   UCHAR                 frameOK;                     /*!< Will be unset if a consistency check, e.g. CRC etc. fails */
    177 
    178   UINT                  flags;                       /*!< Flags for internal decoder use. DO NOT USE self::streaminfo::flags ! */
    179 
    180   MP4_ELEMENT_ID        elements[(8)]; /*!< Table where the element Id's are listed          */
    181   UCHAR                 elTags[(8)];   /*!< Table where the elements id Tags are listed      */
    182   UCHAR                 chMapping[(8)];   /*!< Table of MPEG canonical order to bitstream channel order mapping. */
    183 
    184   AUDIO_CHANNEL_TYPE    channelType[(8)];    /*!< Audio channel type of each output audio channel (from 0 upto numChannels).           */
    185   UCHAR                 channelIndices[(8)]; /*!< Audio channel index for each output audio channel (from 0 upto numChannels).         */
    186                                                              /* See ISO/IEC 13818-7:2005(E), 8.5.3.2 Explicit channel mapping using a program_config_element() */
    187 
    188 
    189   const UCHAR         (*channelOutputMapping)[8];    /*!< Table for MPEG canonical order to output channel order mapping. */
    190   UCHAR                 chMapIndex;                  /*!< Index to access one line of the channelOutputMapping table. This is required
    191                                                           because not all 8 channel configurations have the same output mapping. */
    192 
    193   CProgramConfig                pce;
    194   CStreamInfo                   streamInfo;         /*!< pointer to StreamInfo data (read from the bitstream) */
    195   CAacDecoderChannelInfo       *pAacDecoderChannelInfo[(8)];       /*!< Temporal channel memory */
    196   CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo[(8)]; /*!< Persistent channel memory */
    197 
    198   CAacDecoderCommonData         aacCommonData;             /*!< Temporal shared data for all channels hooked into pAacDecoderChannelInfo */
    199 
    200   CConcealParams                concealCommonData;
    201 
    202   INT                   aacChannelsPrev;                          /*!< The amount of AAC core channels of the last successful decode call.         */
    203   AUDIO_CHANNEL_TYPE    channelTypePrev[(8)];     /*!< Array holding the channelType values of the last successful decode call.    */
    204   UCHAR                 channelIndicesPrev[(8)];  /*!< Array holding the channelIndices values of the last successful decode call. */
    205 
    206 
    207   HANDLE_SBRDECODER   hSbrDecoder;                   /*!< SBR decoder handle.                        */
    208   UCHAR               sbrEnabled;                    /*!< flag to store if SBR has been detected     */
    209   UCHAR               sbrEnabledPrev;                /*!< flag to store if SBR has been detected from previous frame */
    210   UCHAR               psPossible;                    /*!< flag to store if PS is possible            */
    211   SBR_PARAMS          sbrParams;                     /*!< struct to store all sbr parameters         */
    212 
    213   QMF_MODE   qmfModeCurr;                            /*!< The current QMF mode                       */
    214   QMF_MODE   qmfModeUser;                            /*!< The QMF mode requested by the library user */
    215 
    216   HANDLE_AAC_DRC  hDrcInfo;                          /*!< handle to DRC data structure               */
    217 
    218 
    219   CAncData      ancData;                             /*!< structure to handle ancillary data         */
    220 
    221   HANDLE_PCM_DOWNMIX  hPcmUtils;                     /*!< privat data for the PCM utils.             */
    222   TDLimiterPtr hLimiter;                             /*!< Handle of time domain limiter.             */
    223   UCHAR        limiterEnableUser;                    /*!< The limiter configuration requested by the library user */
    224   UCHAR        limiterEnableCurr;                    /*!< The current limiter configuration.         */
    225 
    226   FIXP_DBL     extGain[1];                           /*!< Gain that must be applied to the output signal. */
    227   UINT         extGainDelay;                         /*!< Delay that must be accounted for extGain. */
    228 
    229   INT_PCM      pcmOutputBuffer[(8)*(2048)];
    230 
    231 };
    232 
    233 
    234 #define AAC_DEBUG_EXTHLP "\
    235 --- AAC-Core ---\n\
    236     0x00010000 Header data\n\
    237     0x00020000 CRC data\n\
    238     0x00040000 Channel info\n\
    239     0x00080000 Section data\n\
    240     0x00100000 Scalefactor data\n\
    241     0x00200000 Pulse data\n\
    242     0x00400000 Tns data\n\
    243     0x00800000 Quantized spectrum\n\
    244     0x01000000 Requantized spectrum\n\
    245     0x02000000 Time output\n\
    246     0x04000000 Fatal errors\n\
    247     0x08000000 Buffer fullness\n\
    248     0x10000000 Average bitrate\n\
    249     0x20000000 Synchronization\n\
    250     0x40000000 Concealment\n\
    251     0x7FFF0000 all AAC-Core-Info\n\
    252 "
    253 
    254 /**
    255  * \brief Synchronise QMF mode for all modules using QMF data.
    256  * \param self decoder handle
    257  */
    258 void CAacDecoder_SyncQmfMode(HANDLE_AACDECODER self);
    259 
    260 /**
    261  * \brief Signal a bit stream interruption to the decoder
    262  * \param self decoder handle
    263  */
    264 void CAacDecoder_SignalInterruption(HANDLE_AACDECODER self);
    265 
    266 /*!
    267   \brief Initialize ancillary buffer
    268 
    269   \ancData Pointer to ancillary data structure
    270   \buffer Pointer to (external) anc data buffer
    271   \size Size of the buffer pointed on by buffer
    272 
    273   \return  Error code
    274 */
    275 AAC_DECODER_ERROR CAacDecoder_AncDataInit(CAncData *ancData, unsigned char *buffer, int size);
    276 
    277 /*!
    278   \brief Get one ancillary data element
    279 
    280   \ancData Pointer to ancillary data structure
    281   \index Index of the anc data element to get
    282   \ptr Pointer to a buffer receiving a pointer to the requested anc data element
    283   \size Pointer to a buffer receiving the length of the requested anc data element
    284 
    285   \return  Error code
    286 */
    287 AAC_DECODER_ERROR CAacDecoder_AncDataGet(CAncData *ancData, int index, unsigned char **ptr, int *size);
    288 
    289 
    290 /* initialization of aac decoder */
    291 LINKSPEC_H HANDLE_AACDECODER CAacDecoder_Open(TRANSPORT_TYPE bsFormat);
    292 
    293 /* Initialization of stream-info elements */
    294 LINKSPEC_H AAC_DECODER_ERROR CAacDecoder_Init(HANDLE_AACDECODER self,
    295                                               const CSAudioSpecificConfig *asc);
    296 
    297 /*!
    298   \brief Decodes one aac frame
    299 
    300   The function decodes one aac frame. The decoding of coupling channel
    301   elements are not supported. The transport layer might signal, that the
    302   data of the current frame is invalid, e.g. as a result of a packet
    303   loss in streaming mode.
    304   The bitstream position of transportDec_GetBitstream(self->hInput) must
    305   be exactly the end of the access unit, including all byte alignment bits.
    306   For this purpose, the variable auStartAnchor is used.
    307 
    308   \return  error status
    309 */
    310 LINKSPEC_H AAC_DECODER_ERROR CAacDecoder_DecodeFrame(
    311         HANDLE_AACDECODER self,
    312         const UINT flags,
    313         INT_PCM *pTimeData,
    314         const INT  timeDataSize,
    315         const INT interleaved
    316         );
    317 
    318 /* Destroy aac decoder */
    319 LINKSPEC_H void CAacDecoder_Close ( HANDLE_AACDECODER self );
    320 
    321 /* get streaminfo handle from decoder */
    322 LINKSPEC_H CStreamInfo* CAacDecoder_GetStreamInfo ( HANDLE_AACDECODER self );
    323 
    324 
    325 #endif /* #ifndef AACDECODER_H */
    326