mpv/libfaad2/sbr_dec.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_dec.h,v 1.4 2003/07/29 08:20:13 menno Exp $
**/

#ifndef __SBR_DEC_H__
#define __SBR_DEC_H__

#ifdef __cplusplus
extern "C" {
#endif

typedef struct {
#if 0
    real_t post_exp_re[64];
    real_t post_exp_im[64];
#endif
    real_t *x;
    uint8_t channels;
} qmfa_info;

typedef struct {
    real_t *v;
    uint8_t channels;
} qmfs_info;

typedef struct
{
    uint32_t sample_rate;

    uint8_t rate;
    uint8_t just_seeked;

    uint8_t amp_res[2];

    uint8_t k0;
    uint8_t kx;
    uint8_t M;
    uint8_t N_master;
    uint8_t N_high;
    uint8_t N_low;
    uint8_t N_Q;
    uint8_t N_L[4];
    uint8_t n[2];

    uint8_t f_master[64];
    uint8_t f_table_res[2][64];
    uint8_t f_table_noise[64];
    uint8_t f_table_lim[4][64];
#ifdef SBR_LOW_POWER
    uint8_t f_group[5][64];
    uint8_t N_G[5];
#endif

    uint8_t table_map_k_to_g[64];

    uint8_t abs_bord_lead[2];
    uint8_t abs_bord_trail[2];
    uint8_t n_rel_lead[2];
    uint8_t n_rel_trail[2];

    uint8_t L_E[2];
    uint8_t L_E_prev[2];
    uint8_t L_Q[2];

    uint8_t t_E[2][6];
    uint8_t t_Q[2][3];
    uint8_t f[2][6];
    uint8_t f_prev[2];

    real_t *G_temp_prev[2][5];
    real_t *Q_temp_prev[2][5];

    int16_t E[2][64][5];
    int16_t E_prev[2][64];
    real_t E_orig[2][64][5];
    real_t E_curr[2][64][5];
    int32_t Q[2][64][2];
    int32_t Q_prev[2][64];
    real_t Q_orig[2][64][2];

    int8_t l_A[2];
    int8_t l_A_prev[2];

    uint8_t bs_invf_mode[2][5];
    uint8_t bs_invf_mode_prev[2][5];
    real_t bwArray[2][64];
    real_t bwArray_prev[2][64];

    uint8_t noPatches;
    uint8_t patchNoSubbands[64];
    uint8_t patchStartSubband[64];

    uint8_t bs_add_harmonic[2][64];
    uint8_t bs_add_harmonic_prev[2][64];

    uint16_t index_noise_prev[2];
    uint8_t psi_is_prev[2];

    uint8_t bs_start_freq_prev;
    uint8_t bs_stop_freq_prev;
    uint8_t bs_xover_band_prev;
    uint8_t bs_freq_scale_prev;
    uint8_t bs_alter_scale_prev;
    uint8_t bs_noise_bands_prev;

    int8_t prevEnvIsShort[2];

    int8_t kx_prev;

    uint8_t Reset;
    uint32_t frame;
    uint32_t header_count;

    uint8_t *data;
    uint16_t data_size;

    uint8_t id_aac;
    qmfa_info *qmfa[2];
    qmfs_info *qmfs[2];

    qmf_t *Xsbr[2];
    qmf_t *Xcodec[2];


    /* to get it compiling */
    /* we'll see during the coding of all the tools, whether
       these are all used or not.
    */
    uint8_t bs_header_flag;
    uint8_t bs_crc_flag;
    uint16_t bs_sbr_crc_bits;
    uint8_t bs_protocol_version;
    uint8_t bs_amp_res;
    uint8_t bs_start_freq;
    uint8_t bs_stop_freq;
    uint8_t bs_xover_band;
    uint8_t bs_freq_scale;
    uint8_t bs_alter_scale;
    uint8_t bs_noise_bands;
    uint8_t bs_limiter_bands;
    uint8_t bs_limiter_gains;
    uint8_t bs_interpol_freq;
    uint8_t bs_smoothing_mode;
    uint8_t bs_samplerate_mode;
    uint8_t bs_add_harmonic_flag[2];
    uint8_t bs_add_harmonic_flag_prev[2];
    uint8_t bs_extended_data;
    uint8_t bs_extension_id;
    uint8_t bs_extension_data;
    uint8_t bs_coupling;
    uint8_t bs_frame_class[2];
    uint8_t bs_rel_bord[2][9];
    uint8_t bs_rel_bord_0[2][9];
    uint8_t bs_rel_bord_1[2][9];
    uint8_t bs_pointer[2];
    uint8_t bs_abs_bord_0[2];
    uint8_t bs_abs_bord_1[2];
    uint8_t bs_num_rel_0[2];
    uint8_t bs_num_rel_1[2];
    uint8_t bs_df_env[2][9];
    uint8_t bs_df_noise[2][3];
} sbr_info;

sbr_info *sbrDecodeInit();
void sbrDecodeEnd(sbr_info *sbr);

void sbrDecodeFrame(sbr_info *sbr, real_t *left_channel,
                    real_t *right_channel, uint8_t id_aac,
                    uint8_t just_seeked);


#ifdef __cplusplus
}
#endif
#endif