250 lines
6.0 KiB
C
250 lines
6.0 KiB
C
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/*
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** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
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** Copyright (C) 2003-2004 M. Bakker, Ahead Software AG, http://www.nero.com
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**
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** This program is free software; you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation; either version 2 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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**
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** Any non-GPL usage of this software or parts of this software is strictly
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** forbidden.
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**
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** Commercial non-GPL licensing of this software is possible.
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** For more info contact Ahead Software through Mpeg4AAClicense@nero.com.
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**
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** $Id$
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**/
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#ifndef __SBR_DEC_H__
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#define __SBR_DEC_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef PS_DEC
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#include "ps_dec.h"
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#endif
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#ifdef DRM_PS
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#include "drm_dec.h"
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#endif
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/* MAX_NTSRHFG: maximum of number_time_slots * rate + HFGen. 16*2+8 */
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#define MAX_NTSRHFG 40
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#define MAX_NTSR 32 /* max number_time_slots * rate, ok for DRM and not DRM mode */
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/* MAX_M: maximum value for M */
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#define MAX_M 49
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/* MAX_L_E: maximum value for L_E */
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#define MAX_L_E 5
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typedef struct {
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real_t *x;
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int16_t x_index;
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uint8_t channels;
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} qmfa_info;
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typedef struct {
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real_t *v;
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int16_t v_index;
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uint8_t channels;
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} qmfs_info;
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typedef struct
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{
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uint32_t sample_rate;
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uint32_t maxAACLine;
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uint8_t rate;
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uint8_t just_seeked;
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uint8_t ret;
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uint8_t amp_res[2];
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uint8_t k0;
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uint8_t kx;
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uint8_t M;
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uint8_t N_master;
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uint8_t N_high;
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uint8_t N_low;
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uint8_t N_Q;
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uint8_t N_L[4];
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uint8_t n[2];
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uint8_t f_master[64];
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uint8_t f_table_res[2][64];
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uint8_t f_table_noise[64];
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uint8_t f_table_lim[4][64];
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#ifdef SBR_LOW_POWER
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uint8_t f_group[5][64];
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uint8_t N_G[5];
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#endif
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uint8_t table_map_k_to_g[64];
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uint8_t abs_bord_lead[2];
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uint8_t abs_bord_trail[2];
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uint8_t n_rel_lead[2];
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uint8_t n_rel_trail[2];
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uint8_t L_E[2];
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uint8_t L_E_prev[2];
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uint8_t L_Q[2];
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uint8_t t_E[2][MAX_L_E+1];
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uint8_t t_Q[2][3];
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uint8_t f[2][MAX_L_E+1];
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uint8_t f_prev[2];
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real_t *G_temp_prev[2][5];
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real_t *Q_temp_prev[2][5];
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int8_t GQ_ringbuf_index[2];
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int16_t E[2][64][MAX_L_E];
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int16_t E_prev[2][64];
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#ifndef FIXED_POINT
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real_t E_orig[2][64][MAX_L_E];
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#endif
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real_t E_curr[2][64][MAX_L_E];
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int32_t Q[2][64][2];
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#ifndef FIXED_POINT
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real_t Q_div[2][64][2];
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real_t Q_div2[2][64][2];
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#endif
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int32_t Q_prev[2][64];
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int8_t l_A[2];
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int8_t l_A_prev[2];
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uint8_t bs_invf_mode[2][MAX_L_E];
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uint8_t bs_invf_mode_prev[2][MAX_L_E];
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real_t bwArray[2][64];
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real_t bwArray_prev[2][64];
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uint8_t noPatches;
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uint8_t patchNoSubbands[64];
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uint8_t patchStartSubband[64];
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uint8_t bs_add_harmonic[2][64];
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uint8_t bs_add_harmonic_prev[2][64];
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uint16_t index_noise_prev[2];
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uint8_t psi_is_prev[2];
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uint8_t bs_start_freq_prev;
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uint8_t bs_stop_freq_prev;
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uint8_t bs_xover_band_prev;
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uint8_t bs_freq_scale_prev;
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uint8_t bs_alter_scale_prev;
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uint8_t bs_noise_bands_prev;
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int8_t prevEnvIsShort[2];
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int8_t kx_prev;
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uint8_t bsco;
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uint8_t bsco_prev;
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uint8_t M_prev;
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uint16_t frame_len;
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uint8_t Reset;
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uint32_t frame;
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uint32_t header_count;
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uint8_t id_aac;
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qmfa_info *qmfa[2];
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qmfs_info *qmfs[2];
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qmf_t Xsbr[2][MAX_NTSRHFG][64];
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#ifdef DRM
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uint8_t Is_DRM_SBR;
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#ifdef DRM_PS
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drm_ps_info *drm_ps;
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#endif
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#endif
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uint8_t numTimeSlotsRate;
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uint8_t numTimeSlots;
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uint8_t tHFGen;
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uint8_t tHFAdj;
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#ifdef PS_DEC
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ps_info *ps;
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#endif
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#if (defined(PS_DEC) || defined(DRM_PS))
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uint8_t ps_used;
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#endif
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/* to get it compiling */
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/* we'll see during the coding of all the tools, whether
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these are all used or not.
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*/
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uint8_t bs_header_flag;
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uint8_t bs_crc_flag;
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uint16_t bs_sbr_crc_bits;
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uint8_t bs_protocol_version;
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uint8_t bs_amp_res;
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uint8_t bs_start_freq;
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uint8_t bs_stop_freq;
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uint8_t bs_xover_band;
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uint8_t bs_freq_scale;
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uint8_t bs_alter_scale;
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uint8_t bs_noise_bands;
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uint8_t bs_limiter_bands;
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uint8_t bs_limiter_gains;
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uint8_t bs_interpol_freq;
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uint8_t bs_smoothing_mode;
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uint8_t bs_samplerate_mode;
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uint8_t bs_add_harmonic_flag[2];
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uint8_t bs_add_harmonic_flag_prev[2];
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uint8_t bs_extended_data;
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uint8_t bs_extension_id;
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uint8_t bs_extension_data;
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uint8_t bs_coupling;
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uint8_t bs_frame_class[2];
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uint8_t bs_rel_bord[2][9];
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uint8_t bs_rel_bord_0[2][9];
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uint8_t bs_rel_bord_1[2][9];
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uint8_t bs_pointer[2];
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uint8_t bs_abs_bord_0[2];
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uint8_t bs_abs_bord_1[2];
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uint8_t bs_num_rel_0[2];
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uint8_t bs_num_rel_1[2];
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uint8_t bs_df_env[2][9];
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uint8_t bs_df_noise[2][3];
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} sbr_info;
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sbr_info *sbrDecodeInit(uint16_t framelength, uint8_t id_aac,
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uint32_t sample_rate, uint8_t downSampledSBR
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#ifdef DRM
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, uint8_t IsDRM
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#endif
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);
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void sbrDecodeEnd(sbr_info *sbr);
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uint8_t sbrDecodeCoupleFrame(sbr_info *sbr, real_t *left_chan, real_t *right_chan,
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const uint8_t just_seeked, const uint8_t downSampledSBR);
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uint8_t sbrDecodeSingleFrame(sbr_info *sbr, real_t *channel,
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const uint8_t just_seeked, const uint8_t downSampledSBR);
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#if (defined(PS_DEC) || defined(DRM_PS))
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uint8_t sbrDecodeSingleFramePS(sbr_info *sbr, real_t *left_channel, real_t *right_channel,
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const uint8_t just_seeked, const uint8_t downSampledSBR);
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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