libfaad2/ssr.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: ssr.h,v 1.15 2004/09/04 14:56:29 menno Exp $
  26 **/
  27
  28 #ifndef __SSR_H__
  29 #define __SSR_H__
  30
  31 #ifdef __cplusplus
  32 extern "C" {
  33 #endif
  34
  35 #define SSR_BANDS 4
  36 #define PQFTAPS 96
  37
  38 void ssr_decode(ssr_info *ssr, fb_info *fb, uint8_t window_sequence,
  39                 uint8_t window_shape, uint8_t window_shape_prev,
  40                 real_t *freq_in, real_t *time_out, real_t *overlap,
  41                 real_t ipqf_buffer[SSR_BANDS][96/4],
  42                 real_t *prev_fmd, uint16_t frame_len);
  43
  44
  45 static void ssr_gain_control(ssr_info *ssr, real_t *data, real_t *output,
  46                              real_t *overlap, real_t *prev_fmd, uint8_t band,
  47                              uint8_t window_sequence, uint16_t frame_len);
  48 static void ssr_gc_function(ssr_info *ssr, real_t *prev_fmd,
  49                             real_t *gc_function, uint8_t window_sequence,
  50                             uint16_t frame_len);
  51
  52
  53 #ifdef __cplusplus
  54 }
  55 #endif
  56 #endif