summaryrefslogtreecommitdiff
path: root/audio_codec/libfaad/sbr_huff.c (plain)
blob: c7cce59d5d59b68dc962efda96cfa6171450cec2
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: sbr_huff.c,v 1.21 2007/11/01 12:33:35 menno Exp $
29**/
30
31#include "common.h"
32#include "structs.h"
33
34#ifdef SBR_DEC
35
36#include "sbr_syntax.h"
37#include "bits.h"
38#include "sbr_huff.h"
39#include "sbr_e_nf.h"
40
41
42typedef const int8_t (*sbr_huff_tab)[2];
43
44static const int8_t t_huffman_env_1_5dB[120][2] = {
45 { 1, 2 }, { -64, -65 }, { 3, 4 }, { -63, -66 },
46 { 5, 6 }, { -62, -67 }, { 7, 8 }, { -61, -68 },
47 { 9, 10 }, { -60, -69 }, { 11, 12 }, { -59, -70 },
48 { 13, 14 }, { -58, -71 }, { 15, 16 }, { -57, -72 },
49 { 17, 18 }, { -73, -56 }, { 19, 21 }, { -74, 20 },
50 { -55, -75 }, { 22, 26 }, { 23, 24 }, { -54, -76 },
51 { -77, 25 }, { -53, -78 }, { 27, 34 }, { 28, 29 },
52 { -52, -79 }, { 30, 31 }, { -80, -51 }, { 32, 33 },
53 { -83, -82 }, { -81, -50 }, { 35, 57 }, { 36, 40 },
54 { 37, 38 }, { -88, -84 }, { -48, 39 }, { -90, -85 },
55 { 41, 46 }, { 42, 43 }, { -49, -87 }, { 44, 45 },
56 { -89, -86 }, { -124, -123 }, { 47, 50 }, { 48, 49 },
57 { -122, -121 }, { -120, -119 }, { 51, 54 }, { 52, 53 },
58 { -118, -117 }, { -116, -115 }, { 55, 56 }, { -114, -113 },
59 { -112, -111 }, { 58, 89 }, { 59, 74 }, { 60, 67 },
60 { 61, 64 }, { 62, 63 }, { -110, -109 }, { -108, -107 },
61 { 65, 66 }, { -106, -105 }, { -104, -103 }, { 68, 71 },
62 { 69, 70 }, { -102, -101 }, { -100, -99 }, { 72, 73 },
63 { -98, -97 }, { -96, -95 }, { 75, 82 }, { 76, 79 },
64 { 77, 78 }, { -94, -93 }, { -92, -91 }, { 80, 81 },
65 { -47, -46 }, { -45, -44 }, { 83, 86 }, { 84, 85 },
66 { -43, -42 }, { -41, -40 }, { 87, 88 }, { -39, -38 },
67 { -37, -36 }, { 90, 105 }, { 91, 98 }, { 92, 95 },
68 { 93, 94 }, { -35, -34 }, { -33, -32 }, { 96, 97 },
69 { -31, -30 }, { -29, -28 }, { 99, 102 }, { 100, 101 },
70 { -27, -26 }, { -25, -24 }, { 103, 104 }, { -23, -22 },
71 { -21, -20 }, { 106, 113 }, { 107, 110 }, { 108, 109 },
72 { -19, -18 }, { -17, -16 }, { 111, 112 }, { -15, -14 },
73 { -13, -12 }, { 114, 117 }, { 115, 116 }, { -11, -10 },
74 { -9, -8 }, { 118, 119 }, { -7, -6 }, { -5, -4 }
75};
76
77static const int8_t f_huffman_env_1_5dB[120][2] = {
78 { 1, 2 }, { -64, -65 }, { 3, 4 }, { -63, -66 },
79 { 5, 6 }, { -67, -62 }, { 7, 8 }, { -68, -61 },
80 { 9, 10 }, { -69, -60 }, { 11, 13 }, { -70, 12 },
81 { -59, -71 }, { 14, 16 }, { -58, 15 }, { -72, -57 },
82 { 17, 19 }, { -73, 18 }, { -56, -74 }, { 20, 23 },
83 { 21, 22 }, { -55, -75 }, { -54, -53 }, { 24, 27 },
84 { 25, 26 }, { -76, -52 }, { -77, -51 }, { 28, 31 },
85 { 29, 30 }, { -50, -78 }, { -79, -49 }, { 32, 36 },
86 { 33, 34 }, { -48, -47 }, { -80, 35 }, { -81, -82 },
87 { 37, 47 }, { 38, 41 }, { 39, 40 }, { -83, -46 },
88 { -45, -84 }, { 42, 44 }, { -85, 43 }, { -44, -43 },
89 { 45, 46 }, { -88, -87 }, { -86, -90 }, { 48, 66 },
90 { 49, 56 }, { 50, 53 }, { 51, 52 }, { -92, -42 },
91 { -41, -39 }, { 54, 55 }, { -105, -89 }, { -38, -37 },
92 { 57, 60 }, { 58, 59 }, { -94, -91 }, { -40, -36 },
93 { 61, 63 }, { -20, 62 }, { -115, -110 }, { 64, 65 },
94 { -108, -107 }, { -101, -97 }, { 67, 89 }, { 68, 75 },
95 { 69, 72 }, { 70, 71 }, { -95, -93 }, { -34, -27 },
96 { 73, 74 }, { -22, -17 }, { -16, -124 }, { 76, 82 },
97 { 77, 79 }, { -123, 78 }, { -122, -121 }, { 80, 81 },
98 { -120, -119 }, { -118, -117 }, { 83, 86 }, { 84, 85 },
99 { -116, -114 }, { -113, -112 }, { 87, 88 }, { -111, -109 },
100 { -106, -104 }, { 90, 105 }, { 91, 98 }, { 92, 95 },
101 { 93, 94 }, { -103, -102 }, { -100, -99 }, { 96, 97 },
102 { -98, -96 }, { -35, -33 }, { 99, 102 }, { 100, 101 },
103 { -32, -31 }, { -30, -29 }, { 103, 104 }, { -28, -26 },
104 { -25, -24 }, { 106, 113 }, { 107, 110 }, { 108, 109 },
105 { -23, -21 }, { -19, -18 }, { 111, 112 }, { -15, -14 },
106 { -13, -12 }, { 114, 117 }, { 115, 116 }, { -11, -10 },
107 { -9, -8 }, { 118, 119 }, { -7, -6 }, { -5, -4 }
108};
109
110static const int8_t t_huffman_env_bal_1_5dB[48][2] = {
111 { -64, 1 }, { -63, 2 }, { -65, 3 }, { -62, 4 },
112 { -66, 5 }, { -61, 6 }, { -67, 7 }, { -60, 8 },
113 { -68, 9 }, { 10, 11 }, { -69, -59 }, { 12, 13 },
114 { -70, -58 }, { 14, 28 }, { 15, 21 }, { 16, 18 },
115 { -57, 17 }, { -71, -56 }, { 19, 20 }, { -88, -87 },
116 { -86, -85 }, { 22, 25 }, { 23, 24 }, { -84, -83 },
117 { -82, -81 }, { 26, 27 }, { -80, -79 }, { -78, -77 },
118 { 29, 36 }, { 30, 33 }, { 31, 32 }, { -76, -75 },
119 { -74, -73 }, { 34, 35 }, { -72, -55 }, { -54, -53 },
120 { 37, 41 }, { 38, 39 }, { -52, -51 }, { -50, 40 },
121 { -49, -48 }, { 42, 45 }, { 43, 44 }, { -47, -46 },
122 { -45, -44 }, { 46, 47 }, { -43, -42 }, { -41, -40 }
123};
124
125static const int8_t f_huffman_env_bal_1_5dB[48][2] = {
126 { -64, 1 }, { -65, 2 }, { -63, 3 }, { -66, 4 },
127 { -62, 5 }, { -61, 6 }, { -67, 7 }, { -68, 8 },
128 { -60, 9 }, { 10, 11 }, { -69, -59 }, { -70, 12 },
129 { -58, 13 }, { 14, 17 }, { -71, 15 }, { -57, 16 },
130 { -56, -73 }, { 18, 32 }, { 19, 25 }, { 20, 22 },
131 { -72, 21 }, { -88, -87 }, { 23, 24 }, { -86, -85 },
132 { -84, -83 }, { 26, 29 }, { 27, 28 }, { -82, -81 },
133 { -80, -79 }, { 30, 31 }, { -78, -77 }, { -76, -75 },
134 { 33, 40 }, { 34, 37 }, { 35, 36 }, { -74, -55 },
135 { -54, -53 }, { 38, 39 }, { -52, -51 }, { -50, -49 },
136 { 41, 44 }, { 42, 43 }, { -48, -47 }, { -46, -45 },
137 { 45, 46 }, { -44, -43 }, { -42, 47 }, { -41, -40 }
138};
139
140static const int8_t t_huffman_env_3_0dB[62][2] = {
141 { -64, 1 }, { -65, 2 }, { -63, 3 }, { -66, 4 },
142 { -62, 5 }, { -67, 6 }, { -61, 7 }, { -68, 8 },
143 { -60, 9 }, { 10, 11 }, { -69, -59 }, { 12, 14 },
144 { -70, 13 }, { -71, -58 }, { 15, 18 }, { 16, 17 },
145 { -72, -57 }, { -73, -74 }, { 19, 22 }, { -56, 20 },
146 { -55, 21 }, { -54, -77 }, { 23, 31 }, { 24, 25 },
147 { -75, -76 }, { 26, 27 }, { -78, -53 }, { 28, 29 },
148 { -52, -95 }, { -94, 30 }, { -93, -92 }, { 32, 47 },
149 { 33, 40 }, { 34, 37 }, { 35, 36 }, { -91, -90 },
150 { -89, -88 }, { 38, 39 }, { -87, -86 }, { -85, -84 },
151 { 41, 44 }, { 42, 43 }, { -83, -82 }, { -81, -80 },
152 { 45, 46 }, { -79, -51 }, { -50, -49 }, { 48, 55 },
153 { 49, 52 }, { 50, 51 }, { -48, -47 }, { -46, -45 },
154 { 53, 54 }, { -44, -43 }, { -42, -41 }, { 56, 59 },
155 { 57, 58 }, { -40, -39 }, { -38, -37 }, { 60, 61 },
156 { -36, -35 }, { -34, -33 }
157};
158
159static const int8_t f_huffman_env_3_0dB[62][2] = {
160 { -64, 1 }, { -65, 2 }, { -63, 3 }, { -66, 4 },
161 { -62, 5 }, { -67, 6 }, { 7, 8 }, { -61, -68 },
162 { 9, 10 }, { -60, -69 }, { 11, 12 }, { -59, -70 },
163 { 13, 14 }, { -58, -71 }, { 15, 16 }, { -57, -72 },
164 { 17, 19 }, { -56, 18 }, { -55, -73 }, { 20, 24 },
165 { 21, 22 }, { -74, -54 }, { -53, 23 }, { -75, -76 },
166 { 25, 30 }, { 26, 27 }, { -52, -51 }, { 28, 29 },
167 { -77, -79 }, { -50, -49 }, { 31, 39 }, { 32, 35 },
168 { 33, 34 }, { -78, -46 }, { -82, -88 }, { 36, 37 },
169 { -83, -48 }, { -47, 38 }, { -86, -85 }, { 40, 47 },
170 { 41, 44 }, { 42, 43 }, { -80, -44 }, { -43, -42 },
171 { 45, 46 }, { -39, -87 }, { -84, -40 }, { 48, 55 },
172 { 49, 52 }, { 50, 51 }, { -95, -94 }, { -93, -92 },
173 { 53, 54 }, { -91, -90 }, { -89, -81 }, { 56, 59 },
174 { 57, 58 }, { -45, -41 }, { -38, -37 }, { 60, 61 },
175 { -36, -35 }, { -34, -33 }
176};
177
178static const int8_t t_huffman_env_bal_3_0dB[24][2] = {
179 { -64, 1 }, { -63, 2 }, { -65, 3 }, { -66, 4 },
180 { -62, 5 }, { -61, 6 }, { -67, 7 }, { -68, 8 },
181 { -60, 9 }, { 10, 16 }, { 11, 13 }, { -69, 12 },
182 { -76, -75 }, { 14, 15 }, { -74, -73 }, { -72, -71 },
183 { 17, 20 }, { 18, 19 }, { -70, -59 }, { -58, -57 },
184 { 21, 22 }, { -56, -55 }, { -54, 23 }, { -53, -52 }
185};
186
187static const int8_t f_huffman_env_bal_3_0dB[24][2] = {
188 { -64, 1 }, { -65, 2 }, { -63, 3 }, { -66, 4 },
189 { -62, 5 }, { -61, 6 }, { -67, 7 }, { -68, 8 },
190 { -60, 9 }, { 10, 13 }, { -69, 11 }, { -59, 12 },
191 { -58, -76 }, { 14, 17 }, { 15, 16 }, { -75, -74 },
192 { -73, -72 }, { 18, 21 }, { 19, 20 }, { -71, -70 },
193 { -57, -56 }, { 22, 23 }, { -55, -54 }, { -53, -52 }
194};
195
196static const int8_t t_huffman_noise_3_0dB[62][2] = {
197 { -64, 1 }, { -63, 2 }, { -65, 3 }, { -66, 4 },
198 { -62, 5 }, { -67, 6 }, { 7, 8 }, { -61, -68 },
199 { 9, 30 }, { 10, 15 }, { -60, 11 }, { -69, 12 },
200 { 13, 14 }, { -59, -53 }, { -95, -94 }, { 16, 23 },
201 { 17, 20 }, { 18, 19 }, { -93, -92 }, { -91, -90 },
202 { 21, 22 }, { -89, -88 }, { -87, -86 }, { 24, 27 },
203 { 25, 26 }, { -85, -84 }, { -83, -82 }, { 28, 29 },
204 { -81, -80 }, { -79, -78 }, { 31, 46 }, { 32, 39 },
205 { 33, 36 }, { 34, 35 }, { -77, -76 }, { -75, -74 },
206 { 37, 38 }, { -73, -72 }, { -71, -70 }, { 40, 43 },
207 { 41, 42 }, { -58, -57 }, { -56, -55 }, { 44, 45 },
208 { -54, -52 }, { -51, -50 }, { 47, 54 }, { 48, 51 },
209 { 49, 50 }, { -49, -48 }, { -47, -46 }, { 52, 53 },
210 { -45, -44 }, { -43, -42 }, { 55, 58 }, { 56, 57 },
211 { -41, -40 }, { -39, -38 }, { 59, 60 }, { -37, -36 },
212 { -35, 61 }, { -34, -33 }
213};
214
215static const int8_t t_huffman_noise_bal_3_0dB[24][2] = {
216 { -64, 1 }, { -65, 2 }, { -63, 3 }, { 4, 9 },
217 { -66, 5 }, { -62, 6 }, { 7, 8 }, { -76, -75 },
218 { -74, -73 }, { 10, 17 }, { 11, 14 }, { 12, 13 },
219 { -72, -71 }, { -70, -69 }, { 15, 16 }, { -68, -67 },
220 { -61, -60 }, { 18, 21 }, { 19, 20 }, { -59, -58 },
221 { -57, -56 }, { 22, 23 }, { -55, -54 }, { -53, -52 }
222};
223
224
225static INLINE int16_t sbr_huff_dec(bitfile *ld, sbr_huff_tab t_huff)
226{
227 uint8_t bit;
228 int16_t index = 0;
229
230 while (index >= 0) {
231 bit = (uint8_t)faad_get1bit(ld);
232 index = t_huff[index][bit];
233 }
234
235 return index + 64;
236}
237
238/* table 10 */
239void sbr_envelope(bitfile *ld, sbr_info *sbr, uint8_t ch)
240{
241 uint8_t env, band;
242 int8_t delta = 0;
243 sbr_huff_tab t_huff, f_huff;
244
245 if ((sbr->L_E[ch] == 1) && (sbr->bs_frame_class[ch] == FIXFIX)) {
246 sbr->amp_res[ch] = 0;
247 } else {
248 sbr->amp_res[ch] = sbr->bs_amp_res;
249 }
250
251 if ((sbr->bs_coupling) && (ch == 1)) {
252 delta = 1;
253 if (sbr->amp_res[ch]) {
254 t_huff = t_huffman_env_bal_3_0dB;
255 f_huff = f_huffman_env_bal_3_0dB;
256 } else {
257 t_huff = t_huffman_env_bal_1_5dB;
258 f_huff = f_huffman_env_bal_1_5dB;
259 }
260 } else {
261 delta = 0;
262 if (sbr->amp_res[ch]) {
263 t_huff = t_huffman_env_3_0dB;
264 f_huff = f_huffman_env_3_0dB;
265 } else {
266 t_huff = t_huffman_env_1_5dB;
267 f_huff = f_huffman_env_1_5dB;
268 }
269 }
270
271 for (env = 0; env < sbr->L_E[ch]; env++) {
272 if (sbr->bs_df_env[ch][env] == 0) {
273 if ((sbr->bs_coupling == 1) && (ch == 1)) {
274 if (sbr->amp_res[ch]) {
275 sbr->E[ch][0][env] = (uint16_t)(faad_getbits(ld, 5
276 DEBUGVAR(1, 272, "sbr_envelope(): bs_data_env")) << delta);
277 } else {
278 sbr->E[ch][0][env] = (uint16_t)(faad_getbits(ld, 6
279 DEBUGVAR(1, 273, "sbr_envelope(): bs_data_env")) << delta);
280 }
281 } else {
282 if (sbr->amp_res[ch]) {
283 sbr->E[ch][0][env] = (uint16_t)(faad_getbits(ld, 6
284 DEBUGVAR(1, 274, "sbr_envelope(): bs_data_env")) << delta);
285 } else {
286 sbr->E[ch][0][env] = (uint16_t)(faad_getbits(ld, 7
287 DEBUGVAR(1, 275, "sbr_envelope(): bs_data_env")) << delta);
288 }
289 }
290
291 for (band = 1; band < sbr->n[sbr->f[ch][env]]; band++) {
292 sbr->E[ch][band][env] = (sbr_huff_dec(ld, f_huff) << delta);
293 }
294
295 } else {
296 for (band = 0; band < sbr->n[sbr->f[ch][env]]; band++) {
297 sbr->E[ch][band][env] = (sbr_huff_dec(ld, t_huff) << delta);
298 }
299 }
300 }
301
302 extract_envelope_data(sbr, ch);
303}
304
305/* table 11 */
306void sbr_noise(bitfile *ld, sbr_info *sbr, uint8_t ch)
307{
308 uint8_t noise, band;
309 int8_t delta = 0;
310 sbr_huff_tab t_huff, f_huff;
311
312 if ((sbr->bs_coupling == 1) && (ch == 1)) {
313 delta = 1;
314 t_huff = t_huffman_noise_bal_3_0dB;
315 f_huff = f_huffman_env_bal_3_0dB;
316 } else {
317 delta = 0;
318 t_huff = t_huffman_noise_3_0dB;
319 f_huff = f_huffman_env_3_0dB;
320 }
321
322 for (noise = 0; noise < sbr->L_Q[ch]; noise++) {
323 if (sbr->bs_df_noise[ch][noise] == 0) {
324 if ((sbr->bs_coupling == 1) && (ch == 1)) {
325 sbr->Q[ch][0][noise] = (faad_getbits(ld, 5
326 DEBUGVAR(1, 276, "sbr_noise(): bs_data_noise")) << delta);
327 } else {
328 sbr->Q[ch][0][noise] = (faad_getbits(ld, 5
329 DEBUGVAR(1, 277, "sbr_noise(): bs_data_noise")) << delta);
330 }
331 for (band = 1; band < sbr->N_Q; band++) {
332 sbr->Q[ch][band][noise] = (sbr_huff_dec(ld, f_huff) << delta);
333 }
334 } else {
335 for (band = 0; band < sbr->N_Q; band++) {
336 sbr->Q[ch][band][noise] = (sbr_huff_dec(ld, t_huff) << delta);
337 }
338 }
339 }
340
341 extract_noise_floor_data(sbr, ch);
342}
343
344#endif
345
generated by cgit at 2024-05-18 23:07:49 (GMT)