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ffmpeg-4.2.2/libavcodec/mpegaudiodsp_data.c 2.65 KB
aac5773f   hucm   功能基本完成,接口待打磨
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  /*
   * This file is part of FFmpeg.
   *
   * FFmpeg is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * FFmpeg is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with FFmpeg; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
   */
  
  #include "mpegaudiodsp.h"
  
  /* half mpeg encoding window (full precision) */
  const int32_t ff_mpa_enwindow[257] = {
       0,    -1,    -1,    -1,    -1,    -1,    -1,    -2,
      -2,    -2,    -2,    -3,    -3,    -4,    -4,    -5,
      -5,    -6,    -7,    -7,    -8,    -9,   -10,   -11,
     -13,   -14,   -16,   -17,   -19,   -21,   -24,   -26,
     -29,   -31,   -35,   -38,   -41,   -45,   -49,   -53,
     -58,   -63,   -68,   -73,   -79,   -85,   -91,   -97,
    -104,  -111,  -117,  -125,  -132,  -139,  -147,  -154,
    -161,  -169,  -176,  -183,  -190,  -196,  -202,  -208,
     213,   218,   222,   225,   227,   228,   228,   227,
     224,   221,   215,   208,   200,   189,   177,   163,
     146,   127,   106,    83,    57,    29,    -2,   -36,
     -72,  -111,  -153,  -197,  -244,  -294,  -347,  -401,
    -459,  -519,  -581,  -645,  -711,  -779,  -848,  -919,
    -991, -1064, -1137, -1210, -1283, -1356, -1428, -1498,
   -1567, -1634, -1698, -1759, -1817, -1870, -1919, -1962,
   -2001, -2032, -2057, -2075, -2085, -2087, -2080, -2063,
    2037,  2000,  1952,  1893,  1822,  1739,  1644,  1535,
    1414,  1280,  1131,   970,   794,   605,   402,   185,
     -45,  -288,  -545,  -814, -1095, -1388, -1692, -2006,
   -2330, -2663, -3004, -3351, -3705, -4063, -4425, -4788,
   -5153, -5517, -5879, -6237, -6589, -6935, -7271, -7597,
   -7910, -8209, -8491, -8755, -8998, -9219, -9416, -9585,
   -9727, -9838, -9916, -9959, -9966, -9935, -9863, -9750,
   -9592, -9389, -9139, -8840, -8492, -8092, -7640, -7134,
    6574,  5959,  5288,  4561,  3776,  2935,  2037,  1082,
      70,  -998, -2122, -3300, -4533, -5818, -7154, -8540,
   -9975,-11455,-12980,-14548,-16155,-17799,-19478,-21189,
  -22929,-24694,-26482,-28289,-30112,-31947,-33791,-35640,
  -37489,-39336,-41176,-43006,-44821,-46617,-48390,-50137,
  -51853,-53534,-55178,-56778,-58333,-59838,-61289,-62684,
  -64019,-65290,-66494,-67629,-68692,-69679,-70590,-71420,
  -72169,-72835,-73415,-73908,-74313,-74630,-74856,-74992,
   75038,
  };