1 /* 2 ** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding 3 ** Copyright (C) 2003-2005 M. Bakker, Nero 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 ** The "appropriate copyright message" mentioned in section 2c of the GPLv2 23 ** must read: "Code from FAAD2 is copyright (c) Nero AG, www.nero.com" 24 ** 25 ** Commercial non-GPL licensing of this software is possible. 26 ** For more info contact Nero AG through Mpeg4AAClicense@nero.com. 27 ** 28 ** $Id: sbr_dct.h,v 1.19 2007/11/01 12:33:34 menno Exp $ 29 **/ 30 31 #ifndef __SBR_DCT_H__ 32 #define __SBR_DCT_H__ 33 34 #ifdef __cplusplus 35 extern "C" { 36 #endif 37 38 void dct4_kernel(real_t * in_real, real_t * in_imag, real_t * out_real, real_t * out_imag); 39 40 void DCT3_32_unscaled(real_t *y, real_t *x); 41 void DCT4_32(real_t *y, real_t *x); 42 void DST4_32(real_t *y, real_t *x); 43 void DCT2_32_unscaled(real_t *y, real_t *x); 44 void DCT4_16(real_t *y, real_t *x); 45 void DCT2_16_unscaled(real_t *y, real_t *x); 46 47 48 #ifdef __cplusplus 49 } 50 #endif 51 #endif 52 53