libfaad2/is.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: is.h,v 1.16 2004/09/04 14:56:28 menno Exp $
  26 **/
  27
  28 #ifndef __IS_H__
  29 #define __IS_H__
  30
  31 #ifdef __cplusplus
  32 extern "C" {
  33 #endif
  34
  35 #include "syntax.h"
  36
  37 void is_decode(ic_stream *ics, ic_stream *icsr, real_t *l_spec, real_t *r_spec,
  38                uint16_t frame_len);
  39
  40 static INLINE int8_t is_intensity(ic_stream *ics, uint8_t group, uint8_t sfb)
  41 {
  42     switch (ics->sfb_cb[group][sfb])
  43     {
  44     case INTENSITY_HCB:
  45         return 1;
  46     case INTENSITY_HCB2:
  47         return -1;
  48     default:
  49         return 0;
  50     }
  51 }
  52
  53 static INLINE int8_t invert_intensity(ic_stream *ics, uint8_t group, uint8_t sfb)
  54 {
  55     if (ics->ms_mask_present == 1)
  56         return (1-2*ics->ms_used[group][sfb]);
  57     return 1;
  58 }
  59
  60
  61 #ifdef __cplusplus
  62 }
  63 #endif
  64 #endif