shithub: aacdec

ref: 7b5ba33ae15aaa2a01dd04bac88ffa6f0fb09d8c
dir: /libfaad/sbr_hfadj.h/

/*
** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
** Copyright (C) 2003 M. Bakker, Ahead Software AG, http://www.nero.com
**  
** 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
**
** Any non-GPL usage of this software or parts of this software is strictly
** forbidden.
**
** Commercial non-GPL licensing of this software is possible.
** For more info contact Ahead Software through Mpeg4AAClicense@nero.com.
**
** $Id: sbr_hfadj.h,v 1.8 2003/12/17 14:43:16 menno Exp $
**/

#ifndef __SBR_HFADJ_H__
#define __SBR_HFADJ_H__

#ifdef __cplusplus
extern "C" {
#endif

typedef struct {

    real_t Q_mapped[64][5];

    uint8_t S_index_mapped[64][5];
    uint8_t S_mapped[64][5];

    real_t G_lim_boost[5][64];
    real_t Q_M_lim_boost[5][64];
    real_t S_M_boost[5][64];

} sbr_hfadj_info;


void hf_adjustment(sbr_info *sbr, qmf_t Xsbr[MAX_NTSRHFG][64]
#ifdef SBR_LOW_POWER
                   ,real_t *deg
#endif
                   ,uint8_t ch);


static void map_envelope_data(sbr_info *sbr, sbr_hfadj_info *adj, uint8_t ch);
static void map_noise_data(sbr_info *sbr, sbr_hfadj_info *adj, uint8_t ch);
static void map_sinusoids(sbr_info *sbr, sbr_hfadj_info *adj, uint8_t ch);
static void estimate_current_envelope(sbr_info *sbr, sbr_hfadj_info *adj,
                                      qmf_t Xsbr[MAX_NTSRHFG][64], uint8_t ch);
static void additional_component_levels(sbr_info *sbr, sbr_hfadj_info *adj, uint8_t ch);
static void calculate_gain(sbr_info *sbr, sbr_hfadj_info *adj, uint8_t ch);
#ifdef SBR_LOW_POWER
static void calc_gain_groups(sbr_info *sbr, sbr_hfadj_info *adj, real_t *deg, uint8_t ch);
static void aliasing_reduction(sbr_info *sbr, sbr_hfadj_info *adj, real_t *deg, uint8_t ch);
#endif
static void hf_assembly(sbr_info *sbr, sbr_hfadj_info *adj, qmf_t Xsbr[MAX_NTSRHFG][64], uint8_t ch);


#ifdef __cplusplus
}
#endif
#endif