Home | History | Annotate | Download | only in src
      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 /*!
     85   \file
     86   \brief  Envelope estimation structs and prototypes
     87 */
     88 #ifndef __ENV_EST_H
     89 #define __ENV_EST_H
     90 
     91 #include "sbr_def.h"
     92 #include "sbr_encoder.h" /* SBR econfig structs */
     93 #include "ps_main.h"
     94 #include "bit_sbr.h"
     95 #include "fram_gen.h"
     96 #include "tran_det.h"
     97 #include "code_env.h"
     98 #include "ton_corr.h"
     99 
    100 typedef struct
    101 {
    102   FIXP_DBL  *rBuffer[QMF_MAX_TIME_SLOTS];
    103   FIXP_DBL  *iBuffer[QMF_MAX_TIME_SLOTS];
    104 
    105   FIXP_DBL  *p_YBuffer;
    106 
    107   FIXP_DBL  *YBuffer[QMF_MAX_TIME_SLOTS];
    108   int        YBufferScale[2];
    109 
    110   UCHAR envelopeCompensation[MAX_FREQ_COEFFS];
    111   UCHAR pre_transient_info[2];
    112 
    113 
    114   int YBufferWriteOffset;
    115   int YBufferSzShift;
    116   int rBufferReadOffset;
    117 
    118   int no_cols;
    119   int no_rows;
    120   int start_index;
    121 
    122   int time_slots;
    123   int time_step;
    124 }
    125 SBR_EXTRACT_ENVELOPE;
    126 typedef SBR_EXTRACT_ENVELOPE *HANDLE_SBR_EXTRACT_ENVELOPE;
    127 
    128 struct ENV_CHANNEL
    129 {
    130   SBR_TRANSIENT_DETECTOR sbrTransientDetector;
    131   SBR_CODE_ENVELOPE sbrCodeEnvelope;
    132   SBR_CODE_ENVELOPE sbrCodeNoiseFloor;
    133   SBR_EXTRACT_ENVELOPE sbrExtractEnvelope;
    134 
    135 
    136   SBR_ENVELOPE_FRAME SbrEnvFrame;
    137   SBR_TON_CORR_EST   TonCorr;
    138 
    139   struct SBR_ENV_DATA encEnvData;
    140 
    141   int qmfScale;
    142   UCHAR fLevelProtect;
    143 };
    144 typedef struct ENV_CHANNEL *HANDLE_ENV_CHANNEL;
    145 
    146 /************  Function Declarations ***************/
    147 
    148 INT
    149 FDKsbrEnc_CreateExtractSbrEnvelope (HANDLE_SBR_EXTRACT_ENVELOPE  hSbrCut,
    150                                     INT channel
    151                                    ,INT chInEl
    152                                    ,UCHAR* dynamic_RAM
    153                          );
    154 
    155 
    156 INT
    157 FDKsbrEnc_InitExtractSbrEnvelope (
    158                           HANDLE_SBR_EXTRACT_ENVELOPE hSbr,
    159                           int no_cols,
    160                           int no_rows,
    161                           int start_index,
    162                           int time_slots, int time_step, int tran_off,
    163                           ULONG statesInitFlag
    164                          ,int chInEl
    165                          ,UCHAR* dynamic_RAM
    166                          ,UINT sbrSyntaxFlags
    167                          );
    168 
    169 void FDKsbrEnc_deleteExtractSbrEnvelope (HANDLE_SBR_EXTRACT_ENVELOPE hSbrCut);
    170 
    171 typedef struct {
    172     FREQ_RES res[MAX_NUM_NOISE_VALUES];
    173     int maxQuantError;
    174 
    175 } SBR_FRAME_TEMP_DATA;
    176 
    177 typedef struct {
    178     const SBR_FRAME_INFO *frame_info;
    179     FIXP_DBL noiseFloor[MAX_NUM_NOISE_VALUES];
    180     SCHAR sfb_nrg_coupling[MAX_NUM_ENVELOPE_VALUES]; /* only used if stereomode = SWITCH_L_R_C */
    181     SCHAR sfb_nrg[MAX_NUM_ENVELOPE_VALUES];
    182     SCHAR noise_level_coupling[MAX_NUM_NOISE_VALUES]; /* only used if stereomode = SWITCH_L_R_C */
    183     SCHAR noise_level[MAX_NUM_NOISE_VALUES];
    184     UCHAR transient_info[3];
    185     UCHAR nEnvelopes;
    186 } SBR_ENV_TEMP_DATA;
    187 
    188 /*
    189  * Extract features from QMF data. Afterwards, the QMF data is not required anymore.
    190  */
    191 void
    192 FDKsbrEnc_extractSbrEnvelope1(
    193                    HANDLE_SBR_CONFIG_DATA    h_con,
    194                    HANDLE_SBR_HEADER_DATA    sbrHeaderData,
    195                    HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData,
    196                    HANDLE_ENV_CHANNEL        h_envChan,
    197                    HANDLE_COMMON_DATA        cmonData,
    198                    SBR_ENV_TEMP_DATA   *eData,
    199                    SBR_FRAME_TEMP_DATA *fData
    200                     );
    201 
    202 
    203 /*
    204  * Process the previously features extracted by FDKsbrEnc_extractSbrEnvelope1
    205  * and create/encode SBR envelopes.
    206  */
    207 void
    208 FDKsbrEnc_extractSbrEnvelope2(
    209                    HANDLE_SBR_CONFIG_DATA     h_con,
    210                    HANDLE_SBR_HEADER_DATA     sbrHeaderData,
    211                    HANDLE_PARAMETRIC_STEREO   hParametricStereo,
    212                    HANDLE_SBR_BITSTREAM_DATA  sbrBitstreamData,
    213                    HANDLE_ENV_CHANNEL         sbrEnvChannel0,
    214                    HANDLE_ENV_CHANNEL         sbrEnvChannel1,
    215                    HANDLE_COMMON_DATA         cmonData,
    216                    SBR_ENV_TEMP_DATA         *eData,
    217                    SBR_FRAME_TEMP_DATA       *fData,
    218                    int                        clearOutput
    219                    );
    220 
    221 INT
    222 FDKsbrEnc_GetEnvEstDelay(HANDLE_SBR_EXTRACT_ENVELOPE hSbr);
    223 
    224 #endif
    225