libFDK/include/FDK_tools_rom.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
  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@iis.fraunhofer.de
  82 ----------------------------------------------------------------------------------------------------------- */
  83
  84 /***************************  Fraunhofer IIS FDK Tools  ***********************
  85
  86    Author(s):   Oliver Moser
  87    Description: ROM tables used by FDK tools
  88
  89 ******************************************************************************/
  90
  91 #ifndef __FDK_TOOLS_ROM_H__
  92 #define __FDK_TOOLS_ROM_H__
  93
  94 #include "common_fix.h"
  95 #include "FDK_audio.h"
  96
  97
  98 /* None radix2 rotation vectors */
  99 extern const FIXP_STB RotVectorReal60[60];
 100 extern const FIXP_STB RotVectorImag60[60];
 101 extern const FIXP_STB RotVectorReal240[240];
 102 extern const FIXP_STB RotVectorImag240[240];
 103 extern const FIXP_STB RotVectorReal480[480];
 104 extern const FIXP_STB RotVectorImag480[480];
 105
 106
 107 /* Regular sine tables */
 108 extern const FIXP_STP SineTable512[];
 109 extern const FIXP_STP SineTable480[];
 110
 111 /* AAC-LC windows */
 112 extern const FIXP_WTP SineWindow1024[];
 113 extern const FIXP_WTP KBDWindow1024[];
 114 extern const FIXP_WTP SineWindow128[];
 115 extern const FIXP_WTP KBDWindow128[];
 116
 117 extern const FIXP_WTP SineWindow960[];
 118 extern const FIXP_WTP KBDWindow960[];
 119 extern const FIXP_WTP SineWindow120[];
 120 extern const FIXP_WTP KBDWindow120[];
 121
 122 /* AAC-LD windows */
 123 extern const FIXP_WTP SineWindow512[];
 124 #define LowOverlapWindow512 SineWindow128
 125 extern const FIXP_WTP SineWindow480[];
 126 #define LowOverlapWindow480 SineWindow120
 127
 128
 129
 130 extern const FIXP_WTP SineWindow64[];
 131 extern const FIXP_WTP SineWindow32[];
 132
 133 /**
 134  * \brief Helper table for window slope mapping. You should prefer the usage of the
 135  * function FDKgetWindowSlope(), this table is only made public for some optimized
 136  * access inside dct.cpp.
 137  */
 138 extern const FIXP_WTP *const windowSlopes[2][3][9];
 139
 140 /**
 141  * \brief Window slope access helper. Obtain a window of given length and shape.
 142  * \param length Length of the window slope.
 143  * \param shape Shape index of the window slope. 0: sine window, 1: Kaiser-Bessel. Any other
 144  *              value is applied a mask of 1 to, mapping it to either 0 or 1.
 145  * \param Pointer to window slope or NULL if the requested window slope is not available.
 146  */
 147 const FIXP_WTP * FDKgetWindowSlope(int length, int shape);
 148
 149 extern const FIXP_WTP sin_twiddle_L64[];
 150
 151 /*
 152  * Filter coefficient type definition
 153  */
 154
 155 #if defined(ARCH_PREFER_MULT_16x16) || defined(ARCH_PREFER_MULT_32x16)
 156   #define QMF_COEFF_16BIT
 157 #endif
 158
 159 #define QMF_FILTER_PROTOTYPE_SIZE    640
 160 #define QMF_NO_POLY                  5
 161
 162 #ifdef QMF_COEFF_16BIT
 163   #define FIXP_PFT FIXP_SGL
 164   #define FIXP_QTW FIXP_SGL
 165 #else
 166   #define FIXP_PFT FIXP_DBL
 167   #define FIXP_QTW FIXP_DBL
 168 #endif
 169
 170 #define QMF640_PFT_TABLE_SIZE       (640/2 + QMF_NO_POLY)
 171
 172 extern const FIXP_QTW qmf_phaseshift_cos32[32];
 173 extern const FIXP_QTW qmf_phaseshift_sin32[32];
 174 /* Adapted analysis post-twiddles for down-sampled HQ SBR */
 175 extern const FIXP_QTW qmf_phaseshift_cos_downsamp32[32];
 176 extern const FIXP_QTW qmf_phaseshift_sin_downsamp32[32];
 177 extern const FIXP_QTW qmf_phaseshift_cos64[64];
 178 extern const FIXP_QTW qmf_phaseshift_sin64[64];
 179
 180 extern const FIXP_PFT qmf_64[QMF640_PFT_TABLE_SIZE+QMF_NO_POLY];
 181
 182
 183
 184
 185
 186 #define QMF640_CLDFB_PFT_TABLE_SIZE (640)
 187 #define QMF320_CLDFB_PFT_TABLE_SIZE (320)
 188 #define QMF_CLDFB_PFT_SCALE 1
 189
 190 extern const FIXP_QTW qmf_phaseshift_cos32_cldfb[32];
 191 extern const FIXP_QTW qmf_phaseshift_sin32_cldfb[32];
 192 extern const FIXP_QTW qmf_phaseshift_cos64_cldfb[64];
 193 extern const FIXP_QTW qmf_phaseshift_sin64_cldfb[64];
 194
 195 extern const FIXP_PFT qmf_cldfb_640[QMF640_CLDFB_PFT_TABLE_SIZE];
 196 extern const FIXP_PFT qmf_cldfb_320[QMF320_CLDFB_PFT_TABLE_SIZE];
 197
 198
 199
 200
 201
 202 /*
 203  * Raw Data Block list stuff.
 204  */
 205 typedef enum {
 206   element_instance_tag,
 207   common_window,
 208   global_gain,
 209   ics_info, /* ics_reserved_bit, window_sequence, window_shape, max_sfb, scale_factor_grouping, predictor_data_present, ltp_data_present, ltp_data */
 210   max_sfb,
 211   ms, /* ms_mask_present, ms_used */
 212   /*predictor_data_present,*/ /* part of ics_info */
 213   ltp_data_present,
 214   ltp_data,
 215   section_data,
 216   scale_factor_data,
 217   pulse, /* pulse_data_present, pulse_data  */
 218   tns_data_present,
 219   tns_data,
 220   gain_control_data_present,
 221   gain_control_data,
 222   esc1_hcr,
 223   esc2_rvlc,
 224   spectral_data,
 225
 226   scale_factor_data_usac,
 227   core_mode,
 228   common_tw,
 229   lpd_channel_stream,
 230   tw_data,
 231   noise,
 232   ac_spectral_data,
 233   fac_data,
 234   tns_active, /* introduced in MPEG-D usac CD */
 235   tns_data_present_usac,
 236   common_max_sfb,
 237
 238
 239   /* Non data list items */
 240   adtscrc_start_reg1,
 241   adtscrc_start_reg2,
 242   adtscrc_end_reg1,
 243   adtscrc_end_reg2,
 244   drmcrc_start_reg,
 245   drmcrc_end_reg,
 246   next_channel,
 247   next_channel_loop,
 248   link_sequence,
 249   end_of_sequence
 250 } rbd_id_t;
 251
 252 struct element_list {
 253   const rbd_id_t *id;
 254   const struct element_list *next[2];
 255 };
 256
 257 typedef struct element_list element_list_t;
 258 /**
 259  * \brief get elementary stream pieces list for given parameters.
 260  * \param aot audio object type
 261  * \param epConfig the epConfig value from the current Audio Specific Config
 262  * \param nChannels amount of channels contained in the current element.
 263  * \param layer the layer of the current element.
 264  * \return element_list_t parser guidance structure.
 265  */
 266 const element_list_t * getBitstreamElementList(AUDIO_OBJECT_TYPE aot, SCHAR epConfig, UCHAR nChannels, UCHAR layer);
 267
 268
 269 #endif
 270