libfaad2/ic_predict.h

   1 /*
   2 ** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
   3 ** Copyright (C) 2003-2004 M. Bakker, Ahead Software AG, http://www.nero.com
   4 **
   5 ** This program is free software; you can redistribute it and/or modify
   6 ** it under the terms of the GNU General Public License as published by
   7 ** the Free Software Foundation; either version 2 of the License, or
   8 ** (at your option) any later version.
   9 **
  10 ** This program is distributed in the hope that it will be useful,
  11 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 ** GNU General Public License for more details.
  14 **
  15 ** You should have received a copy of the GNU General Public License
  16 ** along with this program; if not, write to the Free Software
  17 ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18 **
  19 ** Any non-GPL usage of this software or parts of this software is strictly
  20 ** forbidden.
  21 **
  22 ** Commercial non-GPL licensing of this software is possible.
  23 ** For more info contact Ahead Software through Mpeg4AAClicense@nero.com.
  24 **
  25 ** $Id: ic_predict.h,v 1.19 2004/09/04 14:56:28 menno Exp $
  26 **/
  27
  28 #ifdef MAIN_DEC
  29
  30 #ifndef __IC_PREDICT_H__
  31 #define __IC_PREDICT_H__
  32
  33 #ifdef __cplusplus
  34 extern "C" {
  35 #endif
  36
  37 #define ALPHA      REAL_CONST(0.90625)
  38 #define A          REAL_CONST(0.953125)
  39
  40
  41 void pns_reset_pred_state(ic_stream *ics, pred_state *state);
  42 void reset_all_predictors(pred_state *state, uint16_t frame_len);
  43 void ic_prediction(ic_stream *ics, real_t *spec, pred_state *state,
  44                    uint16_t frame_len, uint8_t sf_index);
  45
  46 ALIGN static const real_t mnt_table[128] = {
  47     COEF_CONST(0.9531250000), COEF_CONST(0.9453125000),
  48     COEF_CONST(0.9375000000), COEF_CONST(0.9296875000),
  49     COEF_CONST(0.9257812500), COEF_CONST(0.9179687500),
  50     COEF_CONST(0.9101562500), COEF_CONST(0.9023437500),
  51     COEF_CONST(0.8984375000), COEF_CONST(0.8906250000),
  52     COEF_CONST(0.8828125000), COEF_CONST(0.8789062500),
  53     COEF_CONST(0.8710937500), COEF_CONST(0.8671875000),
  54     COEF_CONST(0.8593750000), COEF_CONST(0.8515625000),
  55     COEF_CONST(0.8476562500), COEF_CONST(0.8398437500),
  56     COEF_CONST(0.8359375000), COEF_CONST(0.8281250000),
  57     COEF_CONST(0.8242187500), COEF_CONST(0.8203125000),
  58     COEF_CONST(0.8125000000), COEF_CONST(0.8085937500),
  59     COEF_CONST(0.8007812500), COEF_CONST(0.7968750000),
  60     COEF_CONST(0.7929687500), COEF_CONST(0.7851562500),
  61     COEF_CONST(0.7812500000), COEF_CONST(0.7773437500),
  62     COEF_CONST(0.7734375000), COEF_CONST(0.7656250000),
  63     COEF_CONST(0.7617187500), COEF_CONST(0.7578125000),
  64     COEF_CONST(0.7539062500), COEF_CONST(0.7500000000),
  65     COEF_CONST(0.7421875000), COEF_CONST(0.7382812500),
  66     COEF_CONST(0.7343750000), COEF_CONST(0.7304687500),
  67     COEF_CONST(0.7265625000), COEF_CONST(0.7226562500),
  68     COEF_CONST(0.7187500000), COEF_CONST(0.7148437500),
  69     COEF_CONST(0.7109375000), COEF_CONST(0.7070312500),
  70     COEF_CONST(0.6992187500), COEF_CONST(0.6953125000),
  71     COEF_CONST(0.6914062500), COEF_CONST(0.6875000000),
  72     COEF_CONST(0.6835937500), COEF_CONST(0.6796875000),
  73     COEF_CONST(0.6796875000), COEF_CONST(0.6757812500),
  74     COEF_CONST(0.6718750000), COEF_CONST(0.6679687500),
  75     COEF_CONST(0.6640625000), COEF_CONST(0.6601562500),
  76     COEF_CONST(0.6562500000), COEF_CONST(0.6523437500),
  77     COEF_CONST(0.6484375000), COEF_CONST(0.6445312500),
  78     COEF_CONST(0.6406250000), COEF_CONST(0.6406250000),
  79     COEF_CONST(0.6367187500), COEF_CONST(0.6328125000),
  80     COEF_CONST(0.6289062500), COEF_CONST(0.6250000000),
  81     COEF_CONST(0.6210937500), COEF_CONST(0.6210937500),
  82     COEF_CONST(0.6171875000), COEF_CONST(0.6132812500),
  83     COEF_CONST(0.6093750000), COEF_CONST(0.6054687500),
  84     COEF_CONST(0.6054687500), COEF_CONST(0.6015625000),
  85     COEF_CONST(0.5976562500), COEF_CONST(0.5937500000),
  86     COEF_CONST(0.5937500000), COEF_CONST(0.5898437500),
  87     COEF_CONST(0.5859375000), COEF_CONST(0.5820312500),
  88     COEF_CONST(0.5820312500), COEF_CONST(0.5781250000),
  89     COEF_CONST(0.5742187500), COEF_CONST(0.5742187500),
  90     COEF_CONST(0.5703125000), COEF_CONST(0.5664062500),
  91     COEF_CONST(0.5664062500), COEF_CONST(0.5625000000),
  92     COEF_CONST(0.5585937500), COEF_CONST(0.5585937500),
  93     COEF_CONST(0.5546875000), COEF_CONST(0.5507812500),
  94     COEF_CONST(0.5507812500), COEF_CONST(0.5468750000),
  95     COEF_CONST(0.5429687500), COEF_CONST(0.5429687500),
  96     COEF_CONST(0.5390625000), COEF_CONST(0.5390625000),
  97     COEF_CONST(0.5351562500), COEF_CONST(0.5312500000),
  98     COEF_CONST(0.5312500000), COEF_CONST(0.5273437500),
  99     COEF_CONST(0.5273437500), COEF_CONST(0.5234375000),
 100     COEF_CONST(0.5195312500), COEF_CONST(0.5195312500),
 101     COEF_CONST(0.5156250000), COEF_CONST(0.5156250000),
 102     COEF_CONST(0.5117187500), COEF_CONST(0.5117187500),
 103     COEF_CONST(0.5078125000), COEF_CONST(0.5078125000),
 104     COEF_CONST(0.5039062500), COEF_CONST(0.5039062500),
 105     COEF_CONST(0.5000000000), COEF_CONST(0.4980468750),
 106     COEF_CONST(0.4960937500), COEF_CONST(0.4941406250),
 107     COEF_CONST(0.4921875000), COEF_CONST(0.4902343750),
 108     COEF_CONST(0.4882812500), COEF_CONST(0.4863281250),
 109     COEF_CONST(0.4843750000), COEF_CONST(0.4824218750),
 110     COEF_CONST(0.4804687500), COEF_CONST(0.4785156250)
 111 };
 112
 113 ALIGN static const real_t exp_table[128] = {
 114     COEF_CONST(0.50000000000000000000000000000000000000000000000000),
 115     COEF_CONST(0.25000000000000000000000000000000000000000000000000),
 116     COEF_CONST(0.12500000000000000000000000000000000000000000000000),
 117     COEF_CONST(0.06250000000000000000000000000000000000000000000000),
 118     COEF_CONST(0.03125000000000000000000000000000000000000000000000),
 119     COEF_CONST(0.01562500000000000000000000000000000000000000000000),
 120     COEF_CONST(0.00781250000000000000000000000000000000000000000000),
 121     COEF_CONST(0.00390625000000000000000000000000000000000000000000),
 122     COEF_CONST(0.00195312500000000000000000000000000000000000000000),
 123     COEF_CONST(0.00097656250000000000000000000000000000000000000000),
 124     COEF_CONST(0.00048828125000000000000000000000000000000000000000),
 125     COEF_CONST(0.00024414062500000000000000000000000000000000000000),
 126     COEF_CONST(0.00012207031250000000000000000000000000000000000000),
 127     COEF_CONST(0.00006103515625000000000000000000000000000000000000),
 128     COEF_CONST(0.00003051757812500000000000000000000000000000000000),
 129     COEF_CONST(0.00001525878906250000000000000000000000000000000000),
 130     COEF_CONST(0.00000762939453125000000000000000000000000000000000),
 131     COEF_CONST(0.00000381469726562500000000000000000000000000000000),
 132     COEF_CONST(0.00000190734863281250000000000000000000000000000000),
 133     COEF_CONST(0.00000095367431640625000000000000000000000000000000),
 134     COEF_CONST(0.00000047683715820312500000000000000000000000000000),
 135     COEF_CONST(0.00000023841857910156250000000000000000000000000000),
 136     COEF_CONST(0.00000011920928955078125000000000000000000000000000),
 137     COEF_CONST(0.00000005960464477539062500000000000000000000000000),
 138     COEF_CONST(0.00000002980232238769531300000000000000000000000000),
 139     COEF_CONST(0.00000001490116119384765600000000000000000000000000),
 140     COEF_CONST(0.00000000745058059692382810000000000000000000000000),
 141     COEF_CONST(0.00000000372529029846191410000000000000000000000000),
 142     COEF_CONST(0.00000000186264514923095700000000000000000000000000),
 143     COEF_CONST(0.00000000093132257461547852000000000000000000000000),
 144     COEF_CONST(0.00000000046566128730773926000000000000000000000000),
 145     COEF_CONST(0.00000000023283064365386963000000000000000000000000),
 146     COEF_CONST(0.00000000011641532182693481000000000000000000000000),
 147     COEF_CONST(0.00000000005820766091346740700000000000000000000000),
 148     COEF_CONST(0.00000000002910383045673370400000000000000000000000),
 149     COEF_CONST(0.00000000001455191522836685200000000000000000000000),
 150     COEF_CONST(0.00000000000727595761418342590000000000000000000000),
 151     COEF_CONST(0.00000000000363797880709171300000000000000000000000),
 152     COEF_CONST(0.00000000000181898940354585650000000000000000000000),
 153     COEF_CONST(0.00000000000090949470177292824000000000000000000000),
 154     COEF_CONST(0.00000000000045474735088646412000000000000000000000),
 155     COEF_CONST(0.00000000000022737367544323206000000000000000000000),
 156     COEF_CONST(0.00000000000011368683772161603000000000000000000000),
 157     COEF_CONST(0.00000000000005684341886080801500000000000000000000),
 158     COEF_CONST(0.00000000000002842170943040400700000000000000000000),
 159     COEF_CONST(0.00000000000001421085471520200400000000000000000000),
 160     COEF_CONST(0.00000000000000710542735760100190000000000000000000),
 161     COEF_CONST(0.00000000000000355271367880050090000000000000000000),
 162     COEF_CONST(0.00000000000000177635683940025050000000000000000000),
 163     COEF_CONST(0.00000000000000088817841970012523000000000000000000),
 164     COEF_CONST(0.00000000000000044408920985006262000000000000000000),
 165     COEF_CONST(0.00000000000000022204460492503131000000000000000000),
 166     COEF_CONST(0.00000000000000011102230246251565000000000000000000),
 167     COEF_CONST(0.00000000000000005551115123125782700000000000000000),
 168     COEF_CONST(0.00000000000000002775557561562891400000000000000000),
 169     COEF_CONST(0.00000000000000001387778780781445700000000000000000),
 170     COEF_CONST(0.00000000000000000693889390390722840000000000000000),
 171     COEF_CONST(0.00000000000000000346944695195361420000000000000000),
 172     COEF_CONST(0.00000000000000000173472347597680710000000000000000),
 173     COEF_CONST(0.00000000000000000086736173798840355000000000000000),
 174     COEF_CONST(0.00000000000000000043368086899420177000000000000000),
 175     COEF_CONST(0.00000000000000000021684043449710089000000000000000),
 176     COEF_CONST(0.00000000000000000010842021724855044000000000000000),
 177     COEF_CONST(0.00000000000000000005421010862427522200000000000000),
 178     COEF_CONST(0.00000000000000000002710505431213761100000000000000),
 179     COEF_CONST(0.00000000000000000001355252715606880500000000000000),
 180     COEF_CONST(0.00000000000000000000677626357803440270000000000000),
 181     COEF_CONST(0.00000000000000000000338813178901720140000000000000),
 182     COEF_CONST(0.00000000000000000000169406589450860070000000000000),
 183     COEF_CONST(0.00000000000000000000084703294725430034000000000000),
 184     COEF_CONST(0.00000000000000000000042351647362715017000000000000),
 185     COEF_CONST(0.00000000000000000000021175823681357508000000000000),
 186     COEF_CONST(0.00000000000000000000010587911840678754000000000000),
 187     COEF_CONST(0.00000000000000000000005293955920339377100000000000),
 188     COEF_CONST(0.00000000000000000000002646977960169688600000000000),
 189     COEF_CONST(0.00000000000000000000001323488980084844300000000000),
 190     COEF_CONST(0.00000000000000000000000661744490042422140000000000),
 191     COEF_CONST(0.00000000000000000000000330872245021211070000000000),
 192     COEF_CONST(0.00000000000000000000000165436122510605530000000000),
 193     COEF_CONST(0.00000000000000000000000082718061255302767000000000),
 194     COEF_CONST(0.00000000000000000000000041359030627651384000000000),
 195     COEF_CONST(0.00000000000000000000000020679515313825692000000000),
 196     COEF_CONST(0.00000000000000000000000010339757656912846000000000),
 197     COEF_CONST(0.00000000000000000000000005169878828456423000000000),
 198     COEF_CONST(0.00000000000000000000000002584939414228211500000000),
 199     COEF_CONST(0.00000000000000000000000001292469707114105700000000),
 200     COEF_CONST(0.00000000000000000000000000646234853557052870000000),
 201     COEF_CONST(0.00000000000000000000000000323117426778526440000000),
 202     COEF_CONST(0.00000000000000000000000000161558713389263220000000),
 203     COEF_CONST(0.00000000000000000000000000080779356694631609000000),
 204     COEF_CONST(0.00000000000000000000000000040389678347315804000000),
 205     COEF_CONST(0.00000000000000000000000000020194839173657902000000),
 206     COEF_CONST(0.00000000000000000000000000010097419586828951000000),
 207     COEF_CONST(0.00000000000000000000000000005048709793414475600000),
 208     COEF_CONST(0.00000000000000000000000000002524354896707237800000),
 209     COEF_CONST(0.00000000000000000000000000001262177448353618900000),
 210     COEF_CONST(0.00000000000000000000000000000631088724176809440000),
 211     COEF_CONST(0.00000000000000000000000000000315544362088404720000),
 212     COEF_CONST(0.00000000000000000000000000000157772181044202360000),
 213     COEF_CONST(0.00000000000000000000000000000078886090522101181000),
 214     COEF_CONST(0.00000000000000000000000000000039443045261050590000),
 215     COEF_CONST(0.00000000000000000000000000000019721522630525295000),
 216     COEF_CONST(0.00000000000000000000000000000009860761315262647600),
 217     COEF_CONST(0.00000000000000000000000000000004930380657631323800),
 218     COEF_CONST(0.00000000000000000000000000000002465190328815661900),
 219     COEF_CONST(0.00000000000000000000000000000001232595164407830900),
 220     COEF_CONST(0.00000000000000000000000000000000616297582203915470),
 221     COEF_CONST(0.00000000000000000000000000000000308148791101957740),
 222     COEF_CONST(0.00000000000000000000000000000000154074395550978870),
 223     COEF_CONST(0.00000000000000000000000000000000077037197775489434),
 224     COEF_CONST(0.00000000000000000000000000000000038518598887744717),
 225     COEF_CONST(0.00000000000000000000000000000000019259299443872359),
 226     COEF_CONST(0.00000000000000000000000000000000009629649721936179),
 227     COEF_CONST(0.00000000000000000000000000000000004814824860968090),
 228     COEF_CONST(0.00000000000000000000000000000000002407412430484045),
 229     COEF_CONST(0.00000000000000000000000000000000001203706215242022),
 230     COEF_CONST(0.00000000000000000000000000000000000601853107621011),
 231     COEF_CONST(0.00000000000000000000000000000000000300926553810506),
 232     COEF_CONST(0.00000000000000000000000000000000000150463276905253),
 233     COEF_CONST(0.00000000000000000000000000000000000075231638452626),
 234     COEF_CONST(0.00000000000000000000000000000000000037615819226313),
 235     COEF_CONST(0.00000000000000000000000000000000000018807909613157),
 236     COEF_CONST(0.00000000000000000000000000000000000009403954806578),
 237     COEF_CONST(0.00000000000000000000000000000000000004701977403289),
 238     COEF_CONST(0.00000000000000000000000000000000000002350988701645),
 239     COEF_CONST(0.00000000000000000000000000000000000001175494350822),
 240     COEF_CONST(0.0 /* 0000000000000000000000000000000000000587747175411 "floating point underflow" */),
 241     COEF_CONST(0.0)
 242 };
 243
 244 #ifdef __cplusplus
 245 }
 246 #endif
 247 #endif
 248
 249 #endif