blob: 9b112f3fb13051eec74547e35097a4403bed0618
| 1 | /* |
| 2 | ** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding |
| 3 | ** Copyright (C) 2003-2005 M. Bakker, Nero 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 | ** The "appropriate copyright message" mentioned in section 2c of the GPLv2 |
| 23 | ** must read: "Code from FAAD2 is copyright (c) Nero AG, www.nero.com" |
| 24 | ** |
| 25 | ** Commercial non-GPL licensing of this software is possible. |
| 26 | ** For more info contact Nero AG through Mpeg4AAClicense@nero.com. |
| 27 | ** |
| 28 | ** $Id: ps_dec.h,v 1.13 2009/01/26 22:32:31 menno Exp $ |
| 29 | **/ |
| 30 | |
| 31 | #ifndef __PS_DEC_H__ |
| 32 | #define __PS_DEC_H__ |
| 33 | |
| 34 | #ifdef __cplusplus |
| 35 | extern "C" { |
| 36 | #endif |
| 37 | |
| 38 | #include "bits.h" |
| 39 | |
| 40 | #define EXTENSION_ID_PS 2 |
| 41 | |
| 42 | #define MAX_PS_ENVELOPES 5 |
| 43 | #define NO_ALLPASS_LINKS 3 |
| 44 | |
| 45 | typedef struct { |
| 46 | /* bitstream parameters */ |
| 47 | uint8_t enable_iid; |
| 48 | uint8_t enable_icc; |
| 49 | uint8_t enable_ext; |
| 50 | |
| 51 | uint8_t iid_mode; |
| 52 | uint8_t icc_mode; |
| 53 | uint8_t nr_iid_par; |
| 54 | uint8_t nr_ipdopd_par; |
| 55 | uint8_t nr_icc_par; |
| 56 | |
| 57 | uint8_t frame_class; |
| 58 | uint8_t num_env; |
| 59 | |
| 60 | uint8_t border_position[MAX_PS_ENVELOPES + 1]; |
| 61 | |
| 62 | uint8_t iid_dt[MAX_PS_ENVELOPES]; |
| 63 | uint8_t icc_dt[MAX_PS_ENVELOPES]; |
| 64 | |
| 65 | uint8_t enable_ipdopd; |
| 66 | uint8_t ipd_mode; |
| 67 | uint8_t ipd_dt[MAX_PS_ENVELOPES]; |
| 68 | uint8_t opd_dt[MAX_PS_ENVELOPES]; |
| 69 | |
| 70 | /* indices */ |
| 71 | int8_t iid_index_prev[34]; |
| 72 | int8_t icc_index_prev[34]; |
| 73 | int8_t ipd_index_prev[17]; |
| 74 | int8_t opd_index_prev[17]; |
| 75 | int8_t iid_index[MAX_PS_ENVELOPES][34]; |
| 76 | int8_t icc_index[MAX_PS_ENVELOPES][34]; |
| 77 | int8_t ipd_index[MAX_PS_ENVELOPES][17]; |
| 78 | int8_t opd_index[MAX_PS_ENVELOPES][17]; |
| 79 | |
| 80 | int8_t ipd_index_1[17]; |
| 81 | int8_t opd_index_1[17]; |
| 82 | int8_t ipd_index_2[17]; |
| 83 | int8_t opd_index_2[17]; |
| 84 | |
| 85 | /* ps data was correctly read */ |
| 86 | uint8_t ps_data_available; |
| 87 | |
| 88 | /* a header has been read */ |
| 89 | uint8_t header_read; |
| 90 | |
| 91 | /* hybrid filterbank parameters */ |
| 92 | void *hyb; |
| 93 | uint8_t use34hybrid_bands; |
| 94 | uint8_t numTimeSlotsRate; |
| 95 | |
| 96 | /**/ |
| 97 | uint8_t num_groups; |
| 98 | uint8_t num_hybrid_groups; |
| 99 | uint8_t nr_par_bands; |
| 100 | uint8_t nr_allpass_bands; |
| 101 | uint8_t decay_cutoff; |
| 102 | |
| 103 | uint8_t *group_border; |
| 104 | uint16_t *map_group2bk; |
| 105 | |
| 106 | /* filter delay handling */ |
| 107 | uint8_t saved_delay; |
| 108 | uint8_t delay_buf_index_ser[NO_ALLPASS_LINKS]; |
| 109 | uint8_t num_sample_delay_ser[NO_ALLPASS_LINKS]; |
| 110 | uint8_t delay_D[64]; |
| 111 | uint8_t delay_buf_index_delay[64]; |
| 112 | |
| 113 | complex_t delay_Qmf[14][64]; /* 14 samples delay max, 64 QMF channels */ |
| 114 | complex_t delay_SubQmf[2][32]; /* 2 samples delay max (SubQmf is always allpass filtered) */ |
| 115 | complex_t delay_Qmf_ser[NO_ALLPASS_LINKS][5][64]; /* 5 samples delay max (table 8.34), 64 QMF channels */ |
| 116 | complex_t delay_SubQmf_ser[NO_ALLPASS_LINKS][5][32]; /* 5 samples delay max (table 8.34) */ |
| 117 | |
| 118 | /* transients */ |
| 119 | real_t alpha_decay; |
| 120 | real_t alpha_smooth; |
| 121 | |
| 122 | real_t P_PeakDecayNrg[34]; |
| 123 | real_t P_prev[34]; |
| 124 | real_t P_SmoothPeakDecayDiffNrg_prev[34]; |
| 125 | |
| 126 | /* mixing and phase */ |
| 127 | complex_t h11_prev[50]; |
| 128 | complex_t h12_prev[50]; |
| 129 | complex_t h21_prev[50]; |
| 130 | complex_t h22_prev[50]; |
| 131 | uint8_t phase_hist; |
| 132 | complex_t ipd_prev[20][2]; |
| 133 | complex_t opd_prev[20][2]; |
| 134 | |
| 135 | } ps_info; |
| 136 | |
| 137 | /* ps_syntax.c */ |
| 138 | uint16_t ps_data(ps_info *ps, bitfile *ld, uint8_t *header); |
| 139 | |
| 140 | /* ps_dec.c */ |
| 141 | ps_info *ps_init(uint8_t sr_index, uint8_t numTimeSlotsRate); |
| 142 | void ps_free(ps_info *ps); |
| 143 | |
| 144 | uint8_t ps_decode(ps_info *ps, qmf_t X_left[38][64], qmf_t X_right[38][64]); |
| 145 | |
| 146 | |
| 147 | #ifdef __cplusplus |
| 148 | } |
| 149 | #endif |
| 150 | #endif |
| 151 | |
| 152 |