imdct.h

来自「Application (fix point) for playing MP3 」· C头文件 代码 · 共 122 行

/*
  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.
 
  This program 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 General Public License for more details.
 
  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
static short win[2][4][36] =
{
  /* Start of table */
  {
   /* Start of row 0 */
    {
      714, 2138, 3546, 4926, 
      6269, 7565, 8803, 9973, 
      11068, 12079, 12998, 13818, 
      14532, 15136, 15625, 15995, 
      16243, 16368, 16368, 16243, 
      15995, 15625, 15136, 14532, 
      13818, 12998, 12079, 11068, 
      9973, 8803, 7565, 6269, 
      4926, 3546, 2138, 714 
    }, /* end of row 0 */
   /* Start of row 1 */
    {
      714, 2138, 3546, 4926, 
      6269, 7565, 8803, 9973, 
      11068, 12079, 12998, 13818, 
      14532, 15136, 15625, 15995, 
      16243, 16368, 16384, 16384, 
      16384, 16384, 16384, 16384, 
      16243, 15136, 12998, 9973, 
      6269, 2138, 0, 0, 
      0, 0, 0, 0 
    }, /* end of row 1 */
   /* Start of row 2 */
    {
      2138, 6269, 9973, 12998, 
      15136, 16243, 16243, 15136, 
      12998, 9973, 6269, 2138, 
      0, 0, 0, 0, 
      0, 0, 0, 0, 
      0, 0, 0, 0, 
      0, 0, 0, 0, 
      0, 0, 0, 0, 
      0, 0, 0, 0 
    }, /* end of row 2 */
   /* Start of row 3 */
    {
      0, 0, 0, 0, 
      0, 0, 2138, 6269, 
      9973, 12998, 15136, 16243, 
      16384, 16384, 16384, 16384, 
      16384, 16384, 16368, 16243, 
      15995, 15625, 15136, 14532, 
      13818, 12998, 12079, 11068, 
      9973, 8803, 7565, 6269, 
      4926, 3546, 2138, 714 
    }, /* end of row 3 */
  },
 /* Start of second half of table */
  {
    /* Start of row 0 */
    {
      714, -2138, 3546, -4926, 
      6269, -7565, 8803, -9973, 
      11068, -12079, 12998, -13818, 
      14532, -15136, 15625, -15995, 
      16243, -16368, 16368, -16243, 
      15995, -15625, 15136, -14532, 
      13818, -12998, 12079, -11068, 
      9973, -8803, 7565, -6269, 
      4926, -3546, 2138, -714 
    }, /* end of row 0 */
    /* Start of row 1 */
    {
      714, -2138, 3546, -4926, 
      6269, -7565, 8803, -9973, 
      11068, -12079, 12998, -13818, 
      14532, -15136, 15625, -15995, 
      16243, -16368, 16384, -16384, 
      16384, -16384, 16384, -16384, 
      16243, -15136, 12998, -9973, 
      6269, -2138, 0, 0, 
      0, 0, 0, 0 
    }, /* end of row 1 */
    /* Start of row 2 */
    {
      2138, -6269, 9973, -12998, 
      15136, -16243, 16243, -15136, 
      12998, -9973, 6269, -2138, 
      0, 0, 0, 0, 
      0, 0, 0, 0, 
      0, 0, 0, 0, 
      0, 0, 0, 0, 
      0, 0, 0, 0, 
      0, 0, 0, 0 
    }, /* end of row 2 */
    /* Start of row 3 */
    {
      0, 0, 0, 0, 
      0, 0, 2138, -6269, 
      9973, -12998, 15136, -16243, 
      16384, -16384, 16384, -16384, 
      16384, -16384, 16368, -16243, 
      15995, -15625, 15136, -14532, 
      13818, -12998, 12079, -11068, 
      9973, -8803, 7565, -6269, 
      4926, -3546, 2138, -714 
    }, /* end of row 3 */
  }
/* End of second half of table */
};