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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** $Id$
26**/
27
28#ifndef __SBR_DEC_H__
29#define __SBR_DEC_H__
30
31#ifdef __cplusplus
32extern "C" {
33#endif
34
35#ifdef PS_DEC
36#include "ps_dec.h"
37#endif
38#ifdef DRM_PS
39#include "drm_dec.h"
40#endif
41
42#define MAX_NTSRHFG 40 /* maximum of number_time_slots * rate + HFGen. 16*2+8 */
43#define MAX_NTSR 32 /* max number_time_slots * rate, ok for DRM and not DRM mode */
44
45/* MAX_M: maximum value for M */
46#define MAX_M 49
47/* MAX_L_E: maximum value for L_E */
48#define MAX_L_E 5
49
50typedef struct {
51 real_t x[2*32*10];
52 int16_t x_index;
53} qmfa_info;
54
55typedef struct {
56 real_t v[2*64*20]; /* Size was "(downSampledSBR)?32:64". We use 64 now. */
57 int16_t v_index;
58} qmfs_info;
59
60typedef struct
61{
62 uint32_t sample_rate;
63 uint32_t maxAACLine;
64
65 uint8_t rate;
66 uint8_t just_seeked;
67 uint8_t ret;
68
69 uint8_t amp_res[2];
70
71 uint8_t k0;
72 uint8_t kx;
73 uint8_t M;
74 uint8_t N_master;
75 uint8_t N_high;
76 uint8_t N_low;
77 uint8_t N_Q;
78 uint8_t N_L[4];
79 uint8_t n[2];
80
81 uint8_t f_master[64];
82 uint8_t f_table_res[2][64];
83 uint8_t f_table_noise[64];
84 uint8_t f_table_lim[4][64];
85#ifdef SBR_LOW_POWER
86 uint8_t f_group[5][64];
87 uint8_t N_G[5];
88#endif
89
90 uint8_t table_map_k_to_g[64];
91
92 uint8_t abs_bord_lead[2];
93 uint8_t abs_bord_trail[2];
94 uint8_t n_rel_lead[2];
95 uint8_t n_rel_trail[2];
96
97 uint8_t L_E[2];
98 uint8_t L_E_prev[2];
99 uint8_t L_Q[2];
100
101 uint8_t t_E[2][MAX_L_E+1];
102 uint8_t t_Q[2][3];
103 uint8_t f[2][MAX_L_E+1];
104 uint8_t f_prev[2];
105
106 real_t G_temp_prev[2][5][64];
107 real_t Q_temp_prev[2][5][64];
108 int8_t GQ_ringbuf_index[2];
109
110 int16_t E[2][64][MAX_L_E];
111 int16_t E_prev[2][64];
112#ifndef FIXED_POINT
113 real_t E_orig[2][64][MAX_L_E];
114#endif
115 real_t E_curr[2][64][MAX_L_E];
116 int32_t Q[2][64][2];
117#ifndef FIXED_POINT
118 real_t Q_div[2][64][2];
119 real_t Q_div2[2][64][2];
120#endif
121 int32_t Q_prev[2][64];
122
123 int8_t l_A[2];
124 int8_t l_A_prev[2];
125
126 uint8_t bs_invf_mode[2][MAX_L_E];
127 uint8_t bs_invf_mode_prev[2][MAX_L_E];
128 real_t bwArray[2][64];
129 real_t bwArray_prev[2][64];
130
131 uint8_t noPatches;
132 uint8_t patchNoSubbands[64];
133 uint8_t patchStartSubband[64];
134
135 uint8_t bs_add_harmonic[2][64];
136 uint8_t bs_add_harmonic_prev[2][64];
137
138 uint16_t index_noise_prev[2];
139 uint8_t psi_is_prev[2];
140
141 uint8_t bs_start_freq_prev;
142 uint8_t bs_stop_freq_prev;
143 uint8_t bs_xover_band_prev;
144 uint8_t bs_freq_scale_prev;
145 uint8_t bs_alter_scale_prev;
146 uint8_t bs_noise_bands_prev;
147
148 int8_t prevEnvIsShort[2];
149
150 int8_t kx_prev;
151 uint8_t bsco;
152 uint8_t bsco_prev;
153 uint8_t M_prev;
154 uint16_t frame_len;
155
156 uint8_t Reset;
157 uint32_t frame;
158 uint32_t header_count;
159
160 uint8_t id_aac;
161 qmfa_info qmfa[2] MEM_ALIGN_ATTR;
162 qmfs_info qmfs[2] MEM_ALIGN_ATTR;
163
164 qmf_t Xsbr[2][MAX_NTSRHFG][64] MEM_ALIGN_ATTR;
165
166#ifdef DRM
167 uint8_t Is_DRM_SBR;
168#ifdef DRM_PS
169 drm_ps_info *drm_ps;
170#endif
171#endif
172
173 uint8_t numTimeSlotsRate;
174 uint8_t numTimeSlots;
175 uint8_t tHFGen;
176 uint8_t tHFAdj;
177
178#ifdef PS_DEC
179 ps_info ps;
180#endif
181#if (defined(PS_DEC) || defined(DRM_PS))
182 uint8_t ps_used;
183#endif
184
185 /* to get it compiling */
186 /* we'll see during the coding of all the tools, whether
187 these are all used or not.
188 */
189 uint8_t bs_header_flag;
190 uint8_t bs_crc_flag;
191 uint16_t bs_sbr_crc_bits;
192 uint8_t bs_protocol_version;
193 uint8_t bs_amp_res;
194 uint8_t bs_start_freq;
195 uint8_t bs_stop_freq;
196 uint8_t bs_xover_band;
197 uint8_t bs_freq_scale;
198 uint8_t bs_alter_scale;
199 uint8_t bs_noise_bands;
200 uint8_t bs_limiter_bands;
201 uint8_t bs_limiter_gains;
202 uint8_t bs_interpol_freq;
203 uint8_t bs_smoothing_mode;
204 uint8_t bs_samplerate_mode;
205 uint8_t bs_add_harmonic_flag[2];
206 uint8_t bs_add_harmonic_flag_prev[2];
207 uint8_t bs_extended_data;
208 uint8_t bs_extension_id;
209 uint8_t bs_extension_data;
210 uint8_t bs_coupling;
211 uint8_t bs_frame_class[2];
212 uint8_t bs_rel_bord[2][9];
213 uint8_t bs_rel_bord_0[2][9];
214 uint8_t bs_rel_bord_1[2][9];
215 uint8_t bs_pointer[2];
216 uint8_t bs_abs_bord_0[2];
217 uint8_t bs_abs_bord_1[2];
218 uint8_t bs_num_rel_0[2];
219 uint8_t bs_num_rel_1[2];
220 uint8_t bs_df_env[2][9];
221 uint8_t bs_df_noise[2][3];
222} sbr_info;
223
224sbr_info *sbrDecodeInit(uint16_t framelength, uint8_t id_aac, uint8_t id_ele,
225 uint32_t sample_rate, uint8_t downSampledSBR,
226 uint8_t IsDRM);
227
228uint8_t sbrDecodeCoupleFrame(sbr_info *sbr, real_t *left_chan, real_t *right_chan,
229 const uint8_t just_seeked, const uint8_t downSampledSBR);
230uint8_t sbrDecodeSingleFrame(sbr_info *sbr, real_t *channel,
231 const uint8_t just_seeked, const uint8_t downSampledSBR);
232#if (defined(PS_DEC) || defined(DRM_PS))
233uint8_t sbrDecodeSingleFramePS(sbr_info *sbr, real_t *left_channel, real_t *right_channel,
234 const uint8_t just_seeked, const uint8_t downSampledSBR);
235#endif
236
237
238#ifdef __cplusplus
239}
240#endif
241#endif
242
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-07 12:56:52 +0000