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1 | /* |
2 | * Copyright (c) 2012 Andrew D'Addesio | |
3 | * Copyright (c) 2013-2014 Mozilla Corporation | |
4 | * | |
5 | * This file is part of FFmpeg. | |
6 | * | |
7 | * FFmpeg is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; either | |
10 | * version 2.1 of the License, or (at your option) any later version. | |
11 | * | |
12 | * FFmpeg is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with FFmpeg; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
22 | /** | |
23 | * @file | |
24 | * Opus SILK decoder | |
25 | */ | |
26 | ||
27 | #include <stdint.h> | |
28 | ||
29 | #include "opus.h" | |
30 | ||
31 | typedef struct SilkFrame { | |
32 | int coded; | |
33 | int log_gain; | |
34 | int16_t nlsf[16]; | |
35 | float lpc[16]; | |
36 | ||
37 | float output [2 * SILK_HISTORY]; | |
38 | float lpc_history[2 * SILK_HISTORY]; | |
39 | int primarylag; | |
40 | ||
41 | int prev_voiced; | |
42 | } SilkFrame; | |
43 | ||
44 | struct SilkContext { | |
45 | AVCodecContext *avctx; | |
46 | int output_channels; | |
47 | ||
48 | int midonly; | |
49 | int subframes; | |
50 | int sflength; | |
51 | int flength; | |
52 | int nlsf_interp_factor; | |
53 | ||
54 | enum OpusBandwidth bandwidth; | |
55 | int wb; | |
56 | ||
57 | SilkFrame frame[2]; | |
58 | float prev_stereo_weights[2]; | |
59 | float stereo_weights[2]; | |
60 | ||
61 | int prev_coded_channels; | |
62 | }; | |
63 | ||
64 | static const uint16_t silk_model_stereo_s1[] = { | |
65 | 256, 7, 9, 10, 11, 12, 22, 46, 54, 55, 56, 59, 82, 174, 197, 200, | |
66 | 201, 202, 210, 234, 244, 245, 246, 247, 249, 256 | |
67 | }; | |
68 | ||
69 | static const uint16_t silk_model_stereo_s2[] = {256, 85, 171, 256}; | |
70 | ||
71 | static const uint16_t silk_model_stereo_s3[] = {256, 51, 102, 154, 205, 256}; | |
72 | ||
73 | static const uint16_t silk_model_mid_only[] = {256, 192, 256}; | |
74 | ||
75 | static const uint16_t silk_model_frame_type_inactive[] = {256, 26, 256}; | |
76 | ||
77 | static const uint16_t silk_model_frame_type_active[] = {256, 24, 98, 246, 256}; | |
78 | ||
79 | static const uint16_t silk_model_gain_highbits[3][9] = { | |
80 | {256, 32, 144, 212, 241, 253, 254, 255, 256}, | |
81 | {256, 2, 19, 64, 124, 186, 233, 252, 256}, | |
82 | {256, 1, 4, 30, 101, 195, 245, 254, 256} | |
83 | }; | |
84 | ||
85 | static const uint16_t silk_model_gain_lowbits[] = {256, 32, 64, 96, 128, 160, 192, 224, 256}; | |
86 | ||
87 | static const uint16_t silk_model_gain_delta[] = { | |
88 | 256, 6, 11, 22, 53, 185, 206, 214, 218, 221, 223, 225, 227, 228, 229, 230, | |
89 | 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, | |
90 | 247, 248, 249, 250, 251, 252, 253, 254, 255, 256 | |
91 | }; | |
92 | static const uint16_t silk_model_lsf_s1[2][2][33] = { | |
93 | { | |
94 | { // NB or MB, unvoiced | |
95 | 256, 44, 78, 108, 127, 148, 160, 171, 174, 177, 179, 195, 197, 199, 200, 205, | |
96 | 207, 208, 211, 214, 215, 216, 218, 220, 222, 225, 226, 235, 244, 246, 253, 255, 256 | |
97 | }, { // NB or MB, voiced | |
98 | 256, 1, 11, 12, 20, 23, 31, 39, 53, 66, 80, 81, 95, 107, 120, 131, | |
99 | 142, 154, 165, 175, 185, 196, 204, 213, 221, 228, 236, 237, 238, 244, 245, 251, 256 | |
100 | } | |
101 | }, { | |
102 | { // WB, unvoiced | |
103 | 256, 31, 52, 55, 72, 73, 81, 98, 102, 103, 121, 137, 141, 143, 146, 147, | |
104 | 157, 158, 161, 177, 188, 204, 206, 208, 211, 213, 224, 225, 229, 238, 246, 253, 256 | |
105 | }, { // WB, voiced | |
106 | 256, 1, 5, 21, 26, 44, 55, 60, 74, 89, 90, 93, 105, 118, 132, 146, | |
107 | 152, 166, 178, 180, 186, 187, 199, 211, 222, 232, 235, 245, 250, 251, 252, 253, 256 | |
108 | } | |
109 | } | |
110 | }; | |
111 | ||
112 | static const uint16_t silk_model_lsf_s2[32][10] = { | |
113 | // NB, MB | |
114 | { 256, 1, 2, 3, 18, 242, 253, 254, 255, 256 }, | |
115 | { 256, 1, 2, 4, 38, 221, 253, 254, 255, 256 }, | |
116 | { 256, 1, 2, 6, 48, 197, 252, 254, 255, 256 }, | |
117 | { 256, 1, 2, 10, 62, 185, 246, 254, 255, 256 }, | |
118 | { 256, 1, 4, 20, 73, 174, 248, 254, 255, 256 }, | |
119 | { 256, 1, 4, 21, 76, 166, 239, 254, 255, 256 }, | |
120 | { 256, 1, 8, 32, 85, 159, 226, 252, 255, 256 }, | |
121 | { 256, 1, 2, 20, 83, 161, 219, 249, 255, 256 }, | |
122 | ||
123 | // WB | |
124 | { 256, 1, 2, 3, 12, 244, 253, 254, 255, 256 }, | |
125 | { 256, 1, 2, 4, 32, 218, 253, 254, 255, 256 }, | |
126 | { 256, 1, 2, 5, 47, 199, 252, 254, 255, 256 }, | |
127 | { 256, 1, 2, 12, 61, 187, 252, 254, 255, 256 }, | |
128 | { 256, 1, 5, 24, 72, 172, 249, 254, 255, 256 }, | |
129 | { 256, 1, 2, 16, 70, 170, 242, 254, 255, 256 }, | |
130 | { 256, 1, 2, 17, 78, 165, 226, 251, 255, 256 }, | |
131 | { 256, 1, 8, 29, 79, 156, 237, 254, 255, 256 } | |
132 | }; | |
133 | ||
134 | static const uint16_t silk_model_lsf_s2_ext[] = { 256, 156, 216, 240, 249, 253, 255, 256 }; | |
135 | ||
136 | static const uint16_t silk_model_lsf_interpolation_offset[] = { 256, 13, 35, 64, 75, 256 }; | |
137 | ||
138 | static const uint16_t silk_model_pitch_highbits[] = { | |
139 | 256, 3, 6, 12, 23, 44, 74, 106, 125, 136, 146, 158, 171, 184, 196, 207, | |
140 | 216, 224, 231, 237, 241, 243, 245, 247, 248, 249, 250, 251, 252, 253, 254, 255, 256 | |
141 | }; | |
142 | ||
143 | static const uint16_t silk_model_pitch_lowbits_nb[]= { 256, 64, 128, 192, 256 }; | |
144 | ||
145 | static const uint16_t silk_model_pitch_lowbits_mb[]= { 256, 43, 85, 128, 171, 213, 256 }; | |
146 | ||
147 | static const uint16_t silk_model_pitch_lowbits_wb[]= { 256, 32, 64, 96, 128, 160, 192, 224, 256 }; | |
148 | ||
149 | static const uint16_t silk_model_pitch_delta[] = { | |
150 | 256, 46, 48, 50, 53, 57, 63, 73, 88, 114, 152, 182, 204, 219, 229, 236, | |
151 | 242, 246, 250, 252, 254, 256 | |
152 | }; | |
153 | ||
154 | static const uint16_t silk_model_pitch_contour_nb10ms[] = { 256, 143, 193, 256 }; | |
155 | ||
156 | static const uint16_t silk_model_pitch_contour_nb20ms[] = { | |
157 | 256, 68, 80, 101, 118, 137, 159, 189, 213, 230, 246, 256 | |
158 | }; | |
159 | ||
160 | static const uint16_t silk_model_pitch_contour_mbwb10ms[] = { | |
161 | 256, 91, 137, 176, 195, 209, 221, 229, 236, 242, 247, 252, 256 | |
162 | }; | |
163 | ||
164 | static const uint16_t silk_model_pitch_contour_mbwb20ms[] = { | |
165 | 256, 33, 55, 73, 89, 104, 118, 132, 145, 158, 168, 177, 186, 194, 200, 206, | |
166 | 212, 217, 221, 225, 229, 232, 235, 238, 240, 242, 244, 246, 248, 250, 252, 253, | |
167 | 254, 255, 256 | |
168 | }; | |
169 | ||
170 | static const uint16_t silk_model_ltp_filter[] = { 256, 77, 157, 256 }; | |
171 | ||
172 | static const uint16_t silk_model_ltp_filter0_sel[] = { | |
173 | 256, 185, 200, 213, 226, 235, 244, 250, 256 | |
174 | }; | |
175 | ||
176 | static const uint16_t silk_model_ltp_filter1_sel[] = { | |
177 | 256, 57, 91, 112, 132, 147, 160, 172, 185, 195, 205, 214, 224, 233, 241, 248, 256 | |
178 | }; | |
179 | ||
180 | static const uint16_t silk_model_ltp_filter2_sel[] = { | |
181 | 256, 15, 31, 45, 57, 69, 81, 92, 103, 114, 124, 133, 142, 151, 160, 168, | |
182 | 176, 184, 192, 199, 206, 212, 218, 223, 227, 232, 236, 240, 244, 247, 251, 254, 256 | |
183 | }; | |
184 | ||
185 | static const uint16_t silk_model_ltp_scale_index[] = { 256, 128, 192, 256 }; | |
186 | ||
187 | static const uint16_t silk_model_lcg_seed[] = { 256, 64, 128, 192, 256 }; | |
188 | ||
189 | static const uint16_t silk_model_exc_rate[2][10] = { | |
190 | { 256, 15, 66, 78, 124, 169, 182, 215, 242, 256 }, // unvoiced | |
191 | { 256, 33, 63, 99, 116, 150, 199, 217, 238, 256 } // voiced | |
192 | }; | |
193 | ||
194 | static const uint16_t silk_model_pulse_count[11][19] = { | |
195 | { 256, 131, 205, 230, 238, 241, 244, 245, 246, | |
196 | 247, 248, 249, 250, 251, 252, 253, 254, 255, 256 }, | |
197 | { 256, 58, 151, 211, 234, 241, 244, 245, 246, | |
198 | 247, 248, 249, 250, 251, 252, 253, 254, 255, 256 }, | |
199 | { 256, 43, 94, 140, 173, 197, 213, 224, 232, | |
200 | 238, 241, 244, 247, 249, 250, 251, 253, 254, 256 }, | |
201 | { 256, 17, 69, 140, 197, 228, 240, 245, 246, | |
202 | 247, 248, 249, 250, 251, 252, 253, 254, 255, 256 }, | |
203 | { 256, 6, 27, 68, 121, 170, 205, 226, 237, | |
204 | 243, 246, 248, 250, 251, 252, 253, 254, 255, 256 }, | |
205 | { 256, 7, 21, 43, 71, 100, 128, 153, 173, | |
206 | 190, 203, 214, 223, 230, 235, 239, 243, 246, 256 }, | |
207 | { 256, 2, 7, 21, 50, 92, 138, 179, 210, | |
208 | 229, 240, 246, 249, 251, 252, 253, 254, 255, 256 }, | |
209 | { 256, 1, 3, 7, 17, 36, 65, 100, 137, | |
210 | 171, 199, 219, 233, 241, 246, 250, 252, 254, 256 }, | |
211 | { 256, 1, 3, 5, 10, 19, 33, 53, 77, | |
212 | 104, 132, 158, 181, 201, 216, 227, 235, 241, 256 }, | |
213 | { 256, 1, 2, 3, 9, 36, 94, 150, 189, | |
214 | 214, 228, 238, 244, 247, 250, 252, 253, 254, 256 }, | |
215 | { 256, 2, 3, 9, 36, 94, 150, 189, 214, | |
216 | 228, 238, 244, 247, 250, 252, 253, 254, 256, 256 } | |
217 | }; | |
218 | ||
219 | static const uint16_t silk_model_pulse_location[4][168] = { | |
220 | { | |
221 | 256, 126, 256, | |
222 | 256, 56, 198, 256, | |
223 | 256, 25, 126, 230, 256, | |
224 | 256, 12, 72, 180, 244, 256, | |
225 | 256, 7, 42, 126, 213, 250, 256, | |
226 | 256, 4, 24, 83, 169, 232, 253, 256, | |
227 | 256, 3, 15, 53, 125, 200, 242, 254, 256, | |
228 | 256, 2, 10, 35, 89, 162, 221, 248, 255, 256, | |
229 | 256, 2, 7, 24, 63, 126, 191, 233, 251, 255, 256, | |
230 | 256, 1, 5, 17, 45, 94, 157, 211, 241, 252, 255, 256, | |
231 | 256, 1, 5, 13, 33, 70, 125, 182, 223, 245, 253, 255, 256, | |
232 | 256, 1, 4, 11, 26, 54, 98, 151, 199, 232, 248, 254, 255, 256, | |
233 | 256, 1, 3, 9, 21, 42, 77, 124, 172, 212, 237, 249, 254, 255, 256, | |
234 | 256, 1, 2, 6, 16, 33, 60, 97, 144, 187, 220, 241, 250, 254, 255, 256, | |
235 | 256, 1, 2, 3, 11, 25, 47, 80, 120, 163, 201, 229, 245, 253, 254, 255, 256, | |
236 | 256, 1, 2, 3, 4, 17, 35, 62, 98, 139, 180, 214, 238, 252, 253, 254, 255, 256 | |
237 | },{ | |
238 | 256, 127, 256, | |
239 | 256, 53, 202, 256, | |
240 | 256, 22, 127, 233, 256, | |
241 | 256, 11, 72, 183, 246, 256, | |
242 | 256, 6, 41, 127, 215, 251, 256, | |
243 | 256, 4, 24, 83, 170, 232, 253, 256, | |
244 | 256, 3, 16, 56, 127, 200, 241, 254, 256, | |
245 | 256, 3, 12, 39, 92, 162, 218, 246, 255, 256, | |
246 | 256, 3, 11, 30, 67, 124, 185, 229, 249, 255, 256, | |
247 | 256, 3, 10, 25, 53, 97, 151, 200, 233, 250, 255, 256, | |
248 | 256, 1, 8, 21, 43, 77, 123, 171, 209, 237, 251, 255, 256, | |
249 | 256, 1, 2, 13, 35, 62, 97, 139, 186, 219, 244, 254, 255, 256, | |
250 | 256, 1, 2, 8, 22, 48, 85, 128, 171, 208, 234, 248, 254, 255, 256, | |
251 | 256, 1, 2, 6, 16, 36, 67, 107, 149, 189, 220, 240, 250, 254, 255, 256, | |
252 | 256, 1, 2, 5, 13, 29, 55, 90, 128, 166, 201, 227, 243, 251, 254, 255, 256, | |
253 | 256, 1, 2, 4, 10, 22, 43, 73, 109, 147, 183, 213, 234, 246, 252, 254, 255, 256 | |
254 | },{ | |
255 | 256, 127, 256, | |
256 | 256, 49, 206, 256, | |
257 | 256, 20, 127, 236, 256, | |
258 | 256, 11, 71, 184, 246, 256, | |
259 | 256, 7, 43, 127, 214, 250, 256, | |
260 | 256, 6, 30, 87, 169, 229, 252, 256, | |
261 | 256, 5, 23, 62, 126, 194, 236, 252, 256, | |
262 | 256, 6, 20, 49, 96, 157, 209, 239, 253, 256, | |
263 | 256, 1, 16, 39, 74, 125, 175, 215, 245, 255, 256, | |
264 | 256, 1, 2, 23, 55, 97, 149, 195, 236, 254, 255, 256, | |
265 | 256, 1, 7, 23, 50, 86, 128, 170, 206, 233, 249, 255, 256, | |
266 | 256, 1, 6, 18, 39, 70, 108, 148, 186, 217, 238, 250, 255, 256, | |
267 | 256, 1, 4, 13, 30, 56, 90, 128, 166, 200, 226, 243, 252, 255, 256, | |
268 | 256, 1, 4, 11, 25, 47, 76, 110, 146, 180, 209, 231, 245, 252, 255, 256, | |
269 | 256, 1, 3, 8, 19, 37, 62, 93, 128, 163, 194, 219, 237, 248, 253, 255, 256, | |
270 | 256, 1, 2, 6, 15, 30, 51, 79, 111, 145, 177, 205, 226, 241, 250, 254, 255, 256 | |
271 | },{ | |
272 | 256, 128, 256, | |
273 | 256, 42, 214, 256, | |
274 | 256, 21, 128, 235, 256, | |
275 | 256, 12, 72, 184, 245, 256, | |
276 | 256, 8, 42, 128, 214, 249, 256, | |
277 | 256, 8, 31, 86, 176, 231, 251, 256, | |
278 | 256, 5, 20, 58, 130, 202, 238, 253, 256, | |
279 | 256, 6, 18, 45, 97, 174, 221, 241, 251, 256, | |
280 | 256, 6, 25, 53, 88, 128, 168, 203, 231, 250, 256, | |
281 | 256, 4, 18, 40, 71, 108, 148, 185, 216, 238, 252, 256, | |
282 | 256, 3, 13, 31, 57, 90, 128, 166, 199, 225, 243, 253, 256, | |
283 | 256, 2, 10, 23, 44, 73, 109, 147, 183, 212, 233, 246, 254, 256, | |
284 | 256, 1, 6, 16, 33, 58, 90, 128, 166, 198, 223, 240, 250, 255, 256, | |
285 | 256, 1, 5, 12, 25, 46, 75, 110, 146, 181, 210, 231, 244, 251, 255, 256, | |
286 | 256, 1, 3, 8, 18, 35, 60, 92, 128, 164, 196, 221, 238, 248, 253, 255, 256, | |
287 | 256, 1, 3, 7, 14, 27, 48, 76, 110, 146, 180, 208, 229, 242, 249, 253, 255, 256 | |
288 | } | |
289 | }; | |
290 | ||
291 | static const uint16_t silk_model_excitation_lsb[] = {256, 136, 256}; | |
292 | ||
293 | static const uint16_t silk_model_excitation_sign[3][2][7][3] = { | |
294 | { // Inactive | |
295 | { // Low offset | |
296 | {256, 2, 256}, | |
297 | {256, 207, 256}, | |
298 | {256, 189, 256}, | |
299 | {256, 179, 256}, | |
300 | {256, 174, 256}, | |
301 | {256, 163, 256}, | |
302 | {256, 157, 256} | |
303 | }, { // High offset | |
304 | {256, 58, 256}, | |
305 | {256, 245, 256}, | |
306 | {256, 238, 256}, | |
307 | {256, 232, 256}, | |
308 | {256, 225, 256}, | |
309 | {256, 220, 256}, | |
310 | {256, 211, 256} | |
311 | } | |
312 | }, { // Unvoiced | |
313 | { // Low offset | |
314 | {256, 1, 256}, | |
315 | {256, 210, 256}, | |
316 | {256, 190, 256}, | |
317 | {256, 178, 256}, | |
318 | {256, 169, 256}, | |
319 | {256, 162, 256}, | |
320 | {256, 152, 256} | |
321 | }, { // High offset | |
322 | {256, 48, 256}, | |
323 | {256, 242, 256}, | |
324 | {256, 235, 256}, | |
325 | {256, 224, 256}, | |
326 | {256, 214, 256}, | |
327 | {256, 205, 256}, | |
328 | {256, 190, 256} | |
329 | } | |
330 | }, { // Voiced | |
331 | { // Low offset | |
332 | {256, 1, 256}, | |
333 | {256, 162, 256}, | |
334 | {256, 152, 256}, | |
335 | {256, 147, 256}, | |
336 | {256, 144, 256}, | |
337 | {256, 141, 256}, | |
338 | {256, 138, 256} | |
339 | }, { // High offset | |
340 | {256, 8, 256}, | |
341 | {256, 203, 256}, | |
342 | {256, 187, 256}, | |
343 | {256, 176, 256}, | |
344 | {256, 168, 256}, | |
345 | {256, 161, 256}, | |
346 | {256, 154, 256} | |
347 | } | |
348 | } | |
349 | }; | |
350 | ||
351 | static const int16_t silk_stereo_weights[] = { | |
352 | -13732, -10050, -8266, -7526, -6500, -5000, -2950, -820, | |
353 | 820, 2950, 5000, 6500, 7526, 8266, 10050, 13732 | |
354 | }; | |
355 | ||
356 | static const uint8_t silk_lsf_s2_model_sel_nbmb[32][10] = { | |
357 | { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, | |
358 | { 1, 3, 1, 2, 2, 1, 2, 1, 1, 1 }, | |
359 | { 2, 1, 1, 1, 1, 1, 1, 1, 1, 1 }, | |
360 | { 1, 2, 2, 2, 2, 1, 2, 1, 1, 1 }, | |
361 | { 2, 3, 3, 3, 3, 2, 2, 2, 2, 2 }, | |
362 | { 0, 5, 3, 3, 2, 2, 2, 2, 1, 1 }, | |
363 | { 0, 2, 2, 2, 2, 2, 2, 2, 2, 1 }, | |
364 | { 2, 3, 6, 4, 4, 4, 5, 4, 5, 5 }, | |
365 | { 2, 4, 5, 5, 4, 5, 4, 6, 4, 4 }, | |
366 | { 2, 4, 4, 7, 4, 5, 4, 5, 5, 4 }, | |
367 | { 4, 3, 3, 3, 2, 3, 2, 2, 2, 2 }, | |
368 | { 1, 5, 5, 6, 4, 5, 4, 5, 5, 5 }, | |
369 | { 2, 7, 4, 6, 5, 5, 5, 5, 5, 5 }, | |
370 | { 2, 7, 5, 5, 5, 5, 5, 6, 5, 4 }, | |
371 | { 3, 3, 5, 4, 4, 5, 4, 5, 4, 4 }, | |
372 | { 2, 3, 3, 5, 5, 4, 4, 4, 4, 4 }, | |
373 | { 2, 4, 4, 6, 4, 5, 4, 5, 5, 5 }, | |
374 | { 2, 5, 4, 6, 5, 5, 5, 4, 5, 4 }, | |
375 | { 2, 7, 4, 5, 4, 5, 4, 5, 5, 5 }, | |
376 | { 2, 5, 4, 6, 7, 6, 5, 6, 5, 4 }, | |
377 | { 3, 6, 7, 4, 6, 5, 5, 6, 4, 5 }, | |
378 | { 2, 7, 6, 4, 4, 4, 5, 4, 5, 5 }, | |
379 | { 4, 5, 5, 4, 6, 6, 5, 6, 5, 4 }, | |
380 | { 2, 5, 5, 6, 5, 6, 4, 6, 4, 4 }, | |
381 | { 4, 5, 5, 5, 3, 7, 4, 5, 5, 4 }, | |
382 | { 2, 3, 4, 5, 5, 6, 4, 5, 5, 4 }, | |
383 | { 2, 3, 2, 3, 3, 4, 2, 3, 3, 3 }, | |
384 | { 1, 1, 2, 2, 2, 2, 2, 3, 2, 2 }, | |
385 | { 4, 5, 5, 6, 6, 6, 5, 6, 4, 5 }, | |
386 | { 3, 5, 5, 4, 4, 4, 4, 3, 3, 2 }, | |
387 | { 2, 5, 3, 7, 5, 5, 4, 4, 5, 4 }, | |
388 | { 4, 4, 5, 4, 5, 6, 5, 6, 5, 4 } | |
389 | }; | |
390 | ||
391 | static const uint8_t silk_lsf_s2_model_sel_wb[32][16] = { | |
392 | { 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8 }, | |
393 | { 10, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 8, 11 }, | |
394 | { 10, 13, 13, 11, 15, 12, 12, 13, 10, 13, 12, 13, 13, 12, 11, 11 }, | |
395 | { 8, 10, 9, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 9 }, | |
396 | { 8, 14, 13, 12, 14, 12, 15, 13, 12, 12, 12, 13, 13, 12, 12, 11 }, | |
397 | { 8, 11, 13, 13, 12, 11, 11, 13, 11, 11, 11, 11, 11, 11, 10, 12 }, | |
398 | { 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8 }, | |
399 | { 8, 10, 14, 11, 15, 10, 13, 11, 12, 13, 13, 12, 11, 11, 10, 11 }, | |
400 | { 8, 14, 10, 14, 14, 12, 13, 12, 14, 13, 12, 12, 13, 11, 11, 11 }, | |
401 | { 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8 }, | |
402 | { 8, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9 }, | |
403 | { 10, 10, 11, 12, 13, 11, 11, 11, 11, 11, 11, 11, 10, 10, 9, 11 }, | |
404 | { 10, 10, 11, 11, 12, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 11 }, | |
405 | { 11, 12, 12, 12, 14, 12, 12, 13, 11, 13, 12, 12, 13, 12, 11, 12 }, | |
406 | { 8, 14, 12, 13, 12, 15, 13, 10, 14, 13, 15, 12, 12, 11, 13, 11 }, | |
407 | { 8, 9, 8, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 9, 8 }, | |
408 | { 9, 14, 13, 15, 13, 12, 13, 11, 12, 13, 12, 12, 12, 11, 11, 12 }, | |
409 | { 9, 11, 11, 12, 12, 11, 11, 13, 10, 11, 11, 13, 13, 13, 11, 12 }, | |
410 | { 10, 11, 11, 10, 10, 10, 11, 10, 9, 10, 9, 10, 9, 9, 9, 12 }, | |
411 | { 8, 10, 11, 13, 11, 11, 10, 10, 10, 9, 9, 8, 8, 8, 8, 8 }, | |
412 | { 11, 12, 11, 13, 11, 11, 10, 10, 9, 9, 9, 9, 9, 10, 10, 12 }, | |
413 | { 10, 14, 11, 15, 15, 12, 13, 12, 13, 11, 13, 11, 11, 10, 11, 11 }, | |
414 | { 10, 11, 13, 14, 14, 11, 13, 11, 12, 12, 11, 11, 11, 11, 10, 12 }, | |
415 | { 9, 11, 11, 12, 12, 12, 12, 11, 13, 13, 13, 11, 9, 9, 9, 9 }, | |
416 | { 10, 13, 11, 14, 14, 12, 15, 12, 12, 13, 11, 12, 12, 11, 11, 11 }, | |
417 | { 8, 14, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8 }, | |
418 | { 8, 14, 14, 11, 13, 10, 13, 13, 11, 12, 12, 15, 15, 12, 12, 12 }, | |
419 | { 11, 11, 15, 11, 13, 12, 11, 11, 11, 10, 10, 11, 11, 11, 10, 11 }, | |
420 | { 8, 8, 9, 8, 8, 8, 10, 9, 10, 9, 9, 10, 10, 10, 9, 9 }, | |
421 | { 8, 11, 10, 13, 11, 11, 10, 11, 10, 9, 8, 8, 9, 8, 8, 9 }, | |
422 | { 11, 13, 13, 12, 15, 13, 11, 11, 10, 11, 10, 10, 9, 8, 9, 8 }, | |
423 | { 10, 11, 13, 11, 12, 11, 11, 11, 10, 9, 10, 14, 12, 8, 8, 8 } | |
424 | }; | |
425 | ||
426 | static const uint8_t silk_lsf_pred_weights_nbmb[2][9] = { | |
427 | {179, 138, 140, 148, 151, 149, 153, 151, 163}, | |
428 | {116, 67, 82, 59, 92, 72, 100, 89, 92} | |
429 | }; | |
430 | ||
431 | static const uint8_t silk_lsf_pred_weights_wb[2][15] = { | |
432 | {175, 148, 160, 176, 178, 173, 174, 164, 177, 174, 196, 182, 198, 192, 182}, | |
433 | { 68, 62, 66, 60, 72, 117, 85, 90, 118, 136, 151, 142, 160, 142, 155} | |
434 | }; | |
435 | ||
436 | static const uint8_t silk_lsf_weight_sel_nbmb[32][9] = { | |
437 | { 0, 1, 0, 0, 0, 0, 0, 0, 0 }, | |
438 | { 1, 0, 0, 0, 0, 0, 0, 0, 0 }, | |
439 | { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, | |
440 | { 1, 1, 1, 0, 0, 0, 0, 1, 0 }, | |
441 | { 0, 1, 0, 0, 0, 0, 0, 0, 0 }, | |
442 | { 0, 1, 0, 0, 0, 0, 0, 0, 0 }, | |
443 | { 1, 0, 1, 1, 0, 0, 0, 1, 0 }, | |
444 | { 0, 1, 1, 0, 0, 1, 1, 0, 0 }, | |
445 | { 0, 0, 1, 1, 0, 1, 0, 1, 1 }, | |
446 | { 0, 0, 1, 1, 0, 0, 1, 1, 1 }, | |
447 | { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, | |
448 | { 0, 1, 0, 1, 1, 1, 1, 1, 0 }, | |
449 | { 0, 1, 0, 1, 1, 1, 1, 1, 0 }, | |
450 | { 0, 1, 1, 1, 1, 1, 1, 1, 0 }, | |
451 | { 1, 0, 1, 1, 0, 1, 1, 1, 1 }, | |
452 | { 0, 1, 1, 1, 1, 1, 0, 1, 0 }, | |
453 | { 0, 0, 1, 1, 0, 1, 0, 1, 0 }, | |
454 | { 0, 0, 1, 1, 1, 0, 1, 1, 1 }, | |
455 | { 0, 1, 1, 0, 0, 1, 1, 1, 0 }, | |
456 | { 0, 0, 0, 1, 1, 1, 0, 1, 0 }, | |
457 | { 0, 1, 1, 0, 0, 1, 0, 1, 0 }, | |
458 | { 0, 1, 1, 0, 0, 0, 1, 1, 0 }, | |
459 | { 0, 0, 0, 0, 0, 1, 1, 1, 1 }, | |
460 | { 0, 0, 1, 1, 0, 0, 0, 1, 1 }, | |
461 | { 0, 0, 0, 1, 0, 1, 1, 1, 1 }, | |
462 | { 0, 1, 1, 1, 1, 1, 1, 1, 0 }, | |
463 | { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, | |
464 | { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, | |
465 | { 0, 0, 1, 0, 1, 1, 0, 1, 0 }, | |
466 | { 1, 0, 0, 1, 0, 0, 0, 0, 0 }, | |
467 | { 0, 0, 0, 1, 1, 0, 1, 0, 1 }, | |
468 | { 1, 0, 1, 1, 0, 1, 1, 1, 1 } | |
469 | }; | |
470 | ||
471 | static const uint8_t silk_lsf_weight_sel_wb[32][15] = { | |
472 | { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 }, | |
473 | { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, | |
474 | { 0, 0, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0 }, | |
475 | { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 }, | |
476 | { 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1, 0 }, | |
477 | { 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, | |
478 | { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0 }, | |
479 | { 0, 1, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 1 }, | |
480 | { 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1 }, | |
481 | { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 }, | |
482 | { 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, | |
483 | { 0, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 0 }, | |
484 | { 0, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0 }, | |
485 | { 0, 0, 0, 0, 1, 1, 0, 1, 0, 1, 1, 1, 1, 0, 0 }, | |
486 | { 0, 1, 0, 0, 0, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1 }, | |
487 | { 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0 }, | |
488 | { 0, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 0, 0 }, | |
489 | { 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0 }, | |
490 | { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 }, | |
491 | { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 }, | |
492 | { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, | |
493 | { 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 1, 0 }, | |
494 | { 0, 0, 1, 1, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 0 }, | |
495 | { 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0 }, | |
496 | { 0, 0, 0, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1 }, | |
497 | { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 }, | |
498 | { 0, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1 }, | |
499 | { 0, 0, 0, 0, 0, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1 }, | |
500 | { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 }, | |
501 | { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 }, | |
502 | { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0 }, | |
503 | { 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, 1, 0 } | |
504 | }; | |
505 | ||
506 | static const uint8_t silk_lsf_codebook_nbmb[32][10] = { | |
507 | { 12, 35, 60, 83, 108, 132, 157, 180, 206, 228 }, | |
508 | { 15, 32, 55, 77, 101, 125, 151, 175, 201, 225 }, | |
509 | { 19, 42, 66, 89, 114, 137, 162, 184, 209, 230 }, | |
510 | { 12, 25, 50, 72, 97, 120, 147, 172, 200, 223 }, | |
511 | { 26, 44, 69, 90, 114, 135, 159, 180, 205, 225 }, | |
512 | { 13, 22, 53, 80, 106, 130, 156, 180, 205, 228 }, | |
513 | { 15, 25, 44, 64, 90, 115, 142, 168, 196, 222 }, | |
514 | { 19, 24, 62, 82, 100, 120, 145, 168, 190, 214 }, | |
515 | { 22, 31, 50, 79, 103, 120, 151, 170, 203, 227 }, | |
516 | { 21, 29, 45, 65, 106, 124, 150, 171, 196, 224 }, | |
517 | { 30, 49, 75, 97, 121, 142, 165, 186, 209, 229 }, | |
518 | { 19, 25, 52, 70, 93, 116, 143, 166, 192, 219 }, | |
519 | { 26, 34, 62, 75, 97, 118, 145, 167, 194, 217 }, | |
520 | { 25, 33, 56, 70, 91, 113, 143, 165, 196, 223 }, | |
521 | { 21, 34, 51, 72, 97, 117, 145, 171, 196, 222 }, | |
522 | { 20, 29, 50, 67, 90, 117, 144, 168, 197, 221 }, | |
523 | { 22, 31, 48, 66, 95, 117, 146, 168, 196, 222 }, | |
524 | { 24, 33, 51, 77, 116, 134, 158, 180, 200, 224 }, | |
525 | { 21, 28, 70, 87, 106, 124, 149, 170, 194, 217 }, | |
526 | { 26, 33, 53, 64, 83, 117, 152, 173, 204, 225 }, | |
527 | { 27, 34, 65, 95, 108, 129, 155, 174, 210, 225 }, | |
528 | { 20, 26, 72, 99, 113, 131, 154, 176, 200, 219 }, | |
529 | { 34, 43, 61, 78, 93, 114, 155, 177, 205, 229 }, | |
530 | { 23, 29, 54, 97, 124, 138, 163, 179, 209, 229 }, | |
531 | { 30, 38, 56, 89, 118, 129, 158, 178, 200, 231 }, | |
532 | { 21, 29, 49, 63, 85, 111, 142, 163, 193, 222 }, | |
533 | { 27, 48, 77, 103, 133, 158, 179, 196, 215, 232 }, | |
534 | { 29, 47, 74, 99, 124, 151, 176, 198, 220, 237 }, | |
535 | { 33, 42, 61, 76, 93, 121, 155, 174, 207, 225 }, | |
536 | { 29, 53, 87, 112, 136, 154, 170, 188, 208, 227 }, | |
537 | { 24, 30, 52, 84, 131, 150, 166, 186, 203, 229 }, | |
538 | { 37, 48, 64, 84, 104, 118, 156, 177, 201, 230 } | |
539 | }; | |
540 | ||
541 | static const uint8_t silk_lsf_codebook_wb[32][16] = { | |
542 | { 7, 23, 38, 54, 69, 85, 100, 116, 131, 147, 162, 178, 193, 208, 223, 239 }, | |
543 | { 13, 25, 41, 55, 69, 83, 98, 112, 127, 142, 157, 171, 187, 203, 220, 236 }, | |
544 | { 15, 21, 34, 51, 61, 78, 92, 106, 126, 136, 152, 167, 185, 205, 225, 240 }, | |
545 | { 10, 21, 36, 50, 63, 79, 95, 110, 126, 141, 157, 173, 189, 205, 221, 237 }, | |
546 | { 17, 20, 37, 51, 59, 78, 89, 107, 123, 134, 150, 164, 184, 205, 224, 240 }, | |
547 | { 10, 15, 32, 51, 67, 81, 96, 112, 129, 142, 158, 173, 189, 204, 220, 236 }, | |
548 | { 8, 21, 37, 51, 65, 79, 98, 113, 126, 138, 155, 168, 179, 192, 209, 218 }, | |
549 | { 12, 15, 34, 55, 63, 78, 87, 108, 118, 131, 148, 167, 185, 203, 219, 236 }, | |
550 | { 16, 19, 32, 36, 56, 79, 91, 108, 118, 136, 154, 171, 186, 204, 220, 237 }, | |
551 | { 11, 28, 43, 58, 74, 89, 105, 120, 135, 150, 165, 180, 196, 211, 226, 241 }, | |
552 | { 6, 16, 33, 46, 60, 75, 92, 107, 123, 137, 156, 169, 185, 199, 214, 225 }, | |
553 | { 11, 19, 30, 44, 57, 74, 89, 105, 121, 135, 152, 169, 186, 202, 218, 234 }, | |
554 | { 12, 19, 29, 46, 57, 71, 88, 100, 120, 132, 148, 165, 182, 199, 216, 233 }, | |
555 | { 17, 23, 35, 46, 56, 77, 92, 106, 123, 134, 152, 167, 185, 204, 222, 237 }, | |
556 | { 14, 17, 45, 53, 63, 75, 89, 107, 115, 132, 151, 171, 188, 206, 221, 240 }, | |
557 | { 9, 16, 29, 40, 56, 71, 88, 103, 119, 137, 154, 171, 189, 205, 222, 237 }, | |
558 | { 16, 19, 36, 48, 57, 76, 87, 105, 118, 132, 150, 167, 185, 202, 218, 236 }, | |
559 | { 12, 17, 29, 54, 71, 81, 94, 104, 126, 136, 149, 164, 182, 201, 221, 237 }, | |
560 | { 15, 28, 47, 62, 79, 97, 115, 129, 142, 155, 168, 180, 194, 208, 223, 238 }, | |
561 | { 8, 14, 30, 45, 62, 78, 94, 111, 127, 143, 159, 175, 192, 207, 223, 239 }, | |
562 | { 17, 30, 49, 62, 79, 92, 107, 119, 132, 145, 160, 174, 190, 204, 220, 235 }, | |
563 | { 14, 19, 36, 45, 61, 76, 91, 108, 121, 138, 154, 172, 189, 205, 222, 238 }, | |
564 | { 12, 18, 31, 45, 60, 76, 91, 107, 123, 138, 154, 171, 187, 204, 221, 236 }, | |
565 | { 13, 17, 31, 43, 53, 70, 83, 103, 114, 131, 149, 167, 185, 203, 220, 237 }, | |
566 | { 17, 22, 35, 42, 58, 78, 93, 110, 125, 139, 155, 170, 188, 206, 224, 240 }, | |
567 | { 8, 15, 34, 50, 67, 83, 99, 115, 131, 146, 162, 178, 193, 209, 224, 239 }, | |
568 | { 13, 16, 41, 66, 73, 86, 95, 111, 128, 137, 150, 163, 183, 206, 225, 241 }, | |
569 | { 17, 25, 37, 52, 63, 75, 92, 102, 119, 132, 144, 160, 175, 191, 212, 231 }, | |
570 | { 19, 31, 49, 65, 83, 100, 117, 133, 147, 161, 174, 187, 200, 213, 227, 242 }, | |
571 | { 18, 31, 52, 68, 88, 103, 117, 126, 138, 149, 163, 177, 192, 207, 223, 239 }, | |
572 | { 16, 29, 47, 61, 76, 90, 106, 119, 133, 147, 161, 176, 193, 209, 224, 240 }, | |
573 | { 15, 21, 35, 50, 61, 73, 86, 97, 110, 119, 129, 141, 175, 198, 218, 237 } | |
574 | }; | |
575 | ||
576 | static const uint16_t silk_lsf_min_spacing_nbmb[] = { | |
577 | 250, 3, 6, 3, 3, 3, 4, 3, 3, 3, 461 | |
578 | }; | |
579 | ||
580 | static const uint16_t silk_lsf_min_spacing_wb[] = { | |
581 | 100, 3, 40, 3, 3, 3, 5, 14, 14, 10, 11, 3, 8, 9, 7, 3, 347 | |
582 | }; | |
583 | ||
584 | static const uint8_t silk_lsf_ordering_nbmb[] = { | |
585 | 0, 9, 6, 3, 4, 5, 8, 1, 2, 7 | |
586 | }; | |
587 | ||
588 | static const uint8_t silk_lsf_ordering_wb[] = { | |
589 | 0, 15, 8, 7, 4, 11, 12, 3, 2, 13, 10, 5, 6, 9, 14, 1 | |
590 | }; | |
591 | ||
592 | static const int16_t silk_cosine[] = { /* (0.12) */ | |
593 | 4096, 4095, 4091, 4085, | |
594 | 4076, 4065, 4052, 4036, | |
595 | 4017, 3997, 3973, 3948, | |
596 | 3920, 3889, 3857, 3822, | |
597 | 3784, 3745, 3703, 3659, | |
598 | 3613, 3564, 3513, 3461, | |
599 | 3406, 3349, 3290, 3229, | |
600 | 3166, 3102, 3035, 2967, | |
601 | 2896, 2824, 2751, 2676, | |
602 | 2599, 2520, 2440, 2359, | |
603 | 2276, 2191, 2106, 2019, | |
604 | 1931, 1842, 1751, 1660, | |
605 | 1568, 1474, 1380, 1285, | |
606 | 1189, 1093, 995, 897, | |
607 | 799, 700, 601, 501, | |
608 | 401, 301, 201, 101, | |
609 | 0, -101, -201, -301, | |
610 | -401, -501, -601, -700, | |
611 | -799, -897, -995, -1093, | |
612 | -1189, -1285, -1380, -1474, | |
613 | -1568, -1660, -1751, -1842, | |
614 | -1931, -2019, -2106, -2191, | |
615 | -2276, -2359, -2440, -2520, | |
616 | -2599, -2676, -2751, -2824, | |
617 | -2896, -2967, -3035, -3102, | |
618 | -3166, -3229, -3290, -3349, | |
619 | -3406, -3461, -3513, -3564, | |
620 | -3613, -3659, -3703, -3745, | |
621 | -3784, -3822, -3857, -3889, | |
622 | -3920, -3948, -3973, -3997, | |
623 | -4017, -4036, -4052, -4065, | |
624 | -4076, -4085, -4091, -4095, | |
625 | -4096 | |
626 | }; | |
627 | ||
628 | static const uint16_t silk_pitch_scale[] = { 4, 6, 8}; | |
629 | ||
630 | static const uint16_t silk_pitch_min_lag[] = { 16, 24, 32}; | |
631 | ||
632 | static const uint16_t silk_pitch_max_lag[] = {144, 216, 288}; | |
633 | ||
634 | static const int8_t silk_pitch_offset_nb10ms[3][2] = { | |
635 | { 0, 0}, | |
636 | { 1, 0}, | |
637 | { 0, 1} | |
638 | }; | |
639 | ||
640 | static const int8_t silk_pitch_offset_nb20ms[11][4] = { | |
641 | { 0, 0, 0, 0}, | |
642 | { 2, 1, 0, -1}, | |
643 | {-1, 0, 1, 2}, | |
644 | {-1, 0, 0, 1}, | |
645 | {-1, 0, 0, 0}, | |
646 | { 0, 0, 0, 1}, | |
647 | { 0, 0, 1, 1}, | |
648 | { 1, 1, 0, 0}, | |
649 | { 1, 0, 0, 0}, | |
650 | { 0, 0, 0, -1}, | |
651 | { 1, 0, 0, -1} | |
652 | }; | |
653 | ||
654 | static const int8_t silk_pitch_offset_mbwb10ms[12][2] = { | |
655 | { 0, 0}, | |
656 | { 0, 1}, | |
657 | { 1, 0}, | |
658 | {-1, 1}, | |
659 | { 1, -1}, | |
660 | {-1, 2}, | |
661 | { 2, -1}, | |
662 | {-2, 2}, | |
663 | { 2, -2}, | |
664 | {-2, 3}, | |
665 | { 3, -2}, | |
666 | {-3, 3} | |
667 | }; | |
668 | ||
669 | static const int8_t silk_pitch_offset_mbwb20ms[34][4] = { | |
670 | { 0, 0, 0, 0}, | |
671 | { 0, 0, 1, 1}, | |
672 | { 1, 1, 0, 0}, | |
673 | {-1, 0, 0, 0}, | |
674 | { 0, 0, 0, 1}, | |
675 | { 1, 0, 0, 0}, | |
676 | {-1, 0, 0, 1}, | |
677 | { 0, 0, 0, -1}, | |
678 | {-1, 0, 1, 2}, | |
679 | { 1, 0, 0, -1}, | |
680 | {-2, -1, 1, 2}, | |
681 | { 2, 1, 0, -1}, | |
682 | {-2, 0, 0, 2}, | |
683 | {-2, 0, 1, 3}, | |
684 | { 2, 1, -1, -2}, | |
685 | {-3, -1, 1, 3}, | |
686 | { 2, 0, 0, -2}, | |
687 | { 3, 1, 0, -2}, | |
688 | {-3, -1, 2, 4}, | |
689 | {-4, -1, 1, 4}, | |
690 | { 3, 1, -1, -3}, | |
691 | {-4, -1, 2, 5}, | |
692 | { 4, 2, -1, -3}, | |
693 | { 4, 1, -1, -4}, | |
694 | {-5, -1, 2, 6}, | |
695 | { 5, 2, -1, -4}, | |
696 | {-6, -2, 2, 6}, | |
697 | {-5, -2, 2, 5}, | |
698 | { 6, 2, -1, -5}, | |
699 | {-7, -2, 3, 8}, | |
700 | { 6, 2, -2, -6}, | |
701 | { 5, 2, -2, -5}, | |
702 | { 8, 3, -2, -7}, | |
703 | {-9, -3, 3, 9} | |
704 | }; | |
705 | ||
706 | static const int8_t silk_ltp_filter0_taps[8][5] = { | |
707 | { 4, 6, 24, 7, 5}, | |
708 | { 0, 0, 2, 0, 0}, | |
709 | { 12, 28, 41, 13, -4}, | |
710 | { -9, 15, 42, 25, 14}, | |
711 | { 1, -2, 62, 41, -9}, | |
712 | {-10, 37, 65, -4, 3}, | |
713 | { -6, 4, 66, 7, -8}, | |
714 | { 16, 14, 38, -3, 33} | |
715 | }; | |
716 | ||
717 | static const int8_t silk_ltp_filter1_taps[16][5] = { | |
718 | { 13, 22, 39, 23, 12}, | |
719 | { -1, 36, 64, 27, -6}, | |
720 | { -7, 10, 55, 43, 17}, | |
721 | { 1, 1, 8, 1, 1}, | |
722 | { 6, -11, 74, 53, -9}, | |
723 | {-12, 55, 76, -12, 8}, | |
724 | { -3, 3, 93, 27, -4}, | |
725 | { 26, 39, 59, 3, -8}, | |
726 | { 2, 0, 77, 11, 9}, | |
727 | { -8, 22, 44, -6, 7}, | |
728 | { 40, 9, 26, 3, 9}, | |
729 | { -7, 20, 101, -7, 4}, | |
730 | { 3, -8, 42, 26, 0}, | |
731 | {-15, 33, 68, 2, 23}, | |
732 | { -2, 55, 46, -2, 15}, | |
733 | { 3, -1, 21, 16, 41} | |
734 | }; | |
735 | ||
736 | static const int8_t silk_ltp_filter2_taps[32][5] = { | |
737 | { -6, 27, 61, 39, 5}, | |
738 | {-11, 42, 88, 4, 1}, | |
739 | { -2, 60, 65, 6, -4}, | |
740 | { -1, -5, 73, 56, 1}, | |
741 | { -9, 19, 94, 29, -9}, | |
742 | { 0, 12, 99, 6, 4}, | |
743 | { 8, -19, 102, 46, -13}, | |
744 | { 3, 2, 13, 3, 2}, | |
745 | { 9, -21, 84, 72, -18}, | |
746 | {-11, 46, 104, -22, 8}, | |
747 | { 18, 38, 48, 23, 0}, | |
748 | {-16, 70, 83, -21, 11}, | |
749 | { 5, -11, 117, 22, -8}, | |
750 | { -6, 23, 117, -12, 3}, | |
751 | { 3, -8, 95, 28, 4}, | |
752 | {-10, 15, 77, 60, -15}, | |
753 | { -1, 4, 124, 2, -4}, | |
754 | { 3, 38, 84, 24, -25}, | |
755 | { 2, 13, 42, 13, 31}, | |
756 | { 21, -4, 56, 46, -1}, | |
757 | { -1, 35, 79, -13, 19}, | |
758 | { -7, 65, 88, -9, -14}, | |
759 | { 20, 4, 81, 49, -29}, | |
760 | { 20, 0, 75, 3, -17}, | |
761 | { 5, -9, 44, 92, -8}, | |
762 | { 1, -3, 22, 69, 31}, | |
763 | { -6, 95, 41, -12, 5}, | |
764 | { 39, 67, 16, -4, 1}, | |
765 | { 0, -6, 120, 55, -36}, | |
766 | {-13, 44, 122, 4, -24}, | |
767 | { 81, 5, 11, 3, 7}, | |
768 | { 2, 0, 9, 10, 88} | |
769 | }; | |
770 | ||
771 | static const uint16_t silk_ltp_scale_factor[] = {15565, 12288, 8192}; | |
772 | ||
773 | static const uint8_t silk_shell_blocks[3][2] = { | |
774 | { 5, 10}, // NB | |
775 | { 8, 15}, // MB | |
776 | {10, 20} // WB | |
777 | }; | |
778 | ||
779 | static const uint8_t silk_quant_offset[2][2] = { /* (0.23) */ | |
780 | {25, 60}, // Inactive or Unvoiced | |
781 | { 8, 25} // Voiced | |
782 | }; | |
783 | ||
784 | static const int silk_stereo_interp_len[3] = { | |
785 | 64, 96, 128 | |
786 | }; | |
787 | ||
788 | static inline void silk_stabilize_lsf(int16_t nlsf[16], int order, const uint16_t min_delta[17]) | |
789 | { | |
790 | int pass, i; | |
791 | for (pass = 0; pass < 20; pass++) { | |
792 | int k, min_diff = 0; | |
793 | for (i = 0; i < order+1; i++) { | |
794 | int low = i != 0 ? nlsf[i-1] : 0; | |
795 | int high = i != order ? nlsf[i] : 32768; | |
796 | int diff = (high - low) - (min_delta[i]); | |
797 | ||
798 | if (diff < min_diff) { | |
799 | min_diff = diff; | |
800 | k = i; | |
801 | ||
802 | if (pass == 20) | |
803 | break; | |
804 | } | |
805 | } | |
806 | if (min_diff == 0) /* no issues; stabilized */ | |
807 | return; | |
808 | ||
809 | /* wiggle one or two LSFs */ | |
810 | if (k == 0) { | |
811 | /* repel away from lower bound */ | |
812 | nlsf[0] = min_delta[0]; | |
813 | } else if (k == order) { | |
814 | /* repel away from higher bound */ | |
815 | nlsf[order-1] = 32768 - min_delta[order]; | |
816 | } else { | |
817 | /* repel away from current position */ | |
818 | int min_center = 0, max_center = 32768, center_val; | |
819 | ||
820 | /* lower extent */ | |
821 | for (i = 0; i < k; i++) | |
822 | min_center += min_delta[i]; | |
823 | min_center += min_delta[k] >> 1; | |
824 | ||
825 | /* upper extent */ | |
826 | for (i = order; i > k; i--) | |
827 | max_center -= min_delta[k]; | |
828 | max_center -= min_delta[k] >> 1; | |
829 | ||
830 | /* move apart */ | |
831 | center_val = nlsf[k - 1] + nlsf[k]; | |
832 | center_val = (center_val >> 1) + (center_val & 1); // rounded divide by 2 | |
833 | center_val = FFMIN(max_center, FFMAX(min_center, center_val)); | |
834 | ||
835 | nlsf[k - 1] = center_val - (min_delta[k] >> 1); | |
836 | nlsf[k] = nlsf[k - 1] + min_delta[k]; | |
837 | } | |
838 | } | |
839 | ||
840 | /* resort to the fall-back method, the standard method for LSF stabilization */ | |
841 | ||
842 | /* sort; as the LSFs should be nearly sorted, use insertion sort */ | |
843 | for (i = 1; i < order; i++) { | |
844 | int j, value = nlsf[i]; | |
845 | for (j = i - 1; j >= 0 && nlsf[j] > value; j--) | |
846 | nlsf[j + 1] = nlsf[j]; | |
847 | nlsf[j + 1] = value; | |
848 | } | |
849 | ||
850 | /* push forwards to increase distance */ | |
851 | if (nlsf[0] < min_delta[0]) | |
852 | nlsf[0] = min_delta[0]; | |
853 | for (i = 1; i < order; i++) | |
854 | if (nlsf[i] < nlsf[i - 1] + min_delta[i]) | |
855 | nlsf[i] = nlsf[i - 1] + min_delta[i]; | |
856 | ||
857 | /* push backwards to increase distance */ | |
858 | if (nlsf[order-1] > 32768 - min_delta[order]) | |
859 | nlsf[order-1] = 32768 - min_delta[order]; | |
860 | for (i = order-2; i >= 0; i--) | |
861 | if (nlsf[i] > nlsf[i + 1] - min_delta[i+1]) | |
862 | nlsf[i] = nlsf[i + 1] - min_delta[i+1]; | |
863 | ||
864 | return; | |
865 | } | |
866 | ||
867 | static inline int silk_is_lpc_stable(const int16_t lpc[16], int order) | |
868 | { | |
869 | int k, j, DC_resp = 0; | |
870 | int32_t lpc32[2][16]; // Q24 | |
871 | int totalinvgain = 1 << 30; // 1.0 in Q30 | |
872 | int32_t *row = lpc32[0], *prevrow; | |
873 | ||
874 | /* initialize the first row for the Levinson recursion */ | |
875 | for (k = 0; k < order; k++) { | |
876 | DC_resp += lpc[k]; | |
877 | row[k] = lpc[k] * 4096; | |
878 | } | |
879 | ||
880 | if (DC_resp >= 4096) | |
881 | return 0; | |
882 | ||
883 | /* check if prediction gain pushes any coefficients too far */ | |
884 | for (k = order - 1; 1; k--) { | |
885 | int rc; // Q31; reflection coefficient | |
886 | int gaindiv; // Q30; inverse of the gain (the divisor) | |
887 | int gain; // gain for this reflection coefficient | |
888 | int fbits; // fractional bits used for the gain | |
889 | int error; // Q29; estimate of the error of our partial estimate of 1/gaindiv | |
890 | ||
891 | if (FFABS(row[k]) > 16773022) | |
892 | return 0; | |
893 | ||
894 | rc = -(row[k] * 128); | |
895 | gaindiv = (1 << 30) - MULH(rc, rc); | |
896 | ||
897 | totalinvgain = MULH(totalinvgain, gaindiv) << 2; | |
898 | if (k == 0) | |
899 | return (totalinvgain >= 107374); | |
900 | ||
901 | /* approximate 1.0/gaindiv */ | |
902 | fbits = opus_ilog(gaindiv); | |
903 | gain = ((1 << 29) - 1) / (gaindiv >> (fbits + 1 - 16)); // Q<fbits-16> | |
904 | error = (1 << 29) - MULL(gaindiv << (15 + 16 - fbits), gain, 16); | |
905 | gain = ((gain << 16) + (error * gain >> 13)); | |
906 | ||
907 | /* switch to the next row of the LPC coefficients */ | |
908 | prevrow = row; | |
909 | row = lpc32[k & 1]; | |
910 | ||
911 | for (j = 0; j < k; j++) { | |
912 | int x = prevrow[j] - ROUND_MULL(prevrow[k - j - 1], rc, 31); | |
913 | row[j] = ROUND_MULL(x, gain, fbits); | |
914 | } | |
915 | } | |
916 | } | |
917 | ||
918 | static void silk_lsp2poly(const int32_t lsp[16], int32_t pol[16], int half_order) | |
919 | { | |
920 | int i, j; | |
921 | ||
922 | pol[0] = 65536; // 1.0 in Q16 | |
923 | pol[1] = -lsp[0]; | |
924 | ||
925 | for (i = 1; i < half_order; i++) { | |
926 | pol[i + 1] = pol[i - 1] * 2 - ROUND_MULL(lsp[2 * i], pol[i], 16); | |
927 | for (j = i; j > 1; j--) | |
928 | pol[j] += pol[j - 2] - ROUND_MULL(lsp[2 * i], pol[j - 1], 16); | |
929 | ||
930 | pol[1] -= lsp[2 * i]; | |
931 | } | |
932 | } | |
933 | ||
934 | static void silk_lsf2lpc(const int16_t nlsf[16], float lpcf[16], int order) | |
935 | { | |
936 | int i, k; | |
937 | int32_t lsp[16]; // Q17; 2*cos(LSF) | |
938 | int32_t p[9], q[9]; // Q16 | |
939 | int32_t lpc32[16]; // Q17 | |
940 | int16_t lpc[16]; // Q12 | |
941 | ||
942 | /* convert the LSFs to LSPs, i.e. 2*cos(LSF) */ | |
943 | for (k = 0; k < order; k++) { | |
944 | int index = nlsf[k] >> 8; | |
945 | int offset = nlsf[k] & 255; | |
946 | int k2 = (order == 10) ? silk_lsf_ordering_nbmb[k] : silk_lsf_ordering_wb[k]; | |
947 | ||
948 | /* interpolate and round */ | |
949 | lsp[k2] = silk_cosine[index] * 256; | |
950 | lsp[k2] += (silk_cosine[index + 1] - silk_cosine[index]) * offset; | |
951 | lsp[k2] = (lsp[k2] + 4) >> 3; | |
952 | } | |
953 | ||
954 | silk_lsp2poly(lsp , p, order >> 1); | |
955 | silk_lsp2poly(lsp + 1, q, order >> 1); | |
956 | ||
957 | /* reconstruct A(z) */ | |
958 | for (k = 0; k < order>>1; k++) { | |
959 | lpc32[k] = -p[k + 1] - p[k] - q[k + 1] + q[k]; | |
960 | lpc32[order-k-1] = -p[k + 1] - p[k] + q[k + 1] - q[k]; | |
961 | } | |
962 | ||
963 | /* limit the range of the LPC coefficients to each fit within an int16_t */ | |
964 | for (i = 0; i < 10; i++) { | |
965 | int j; | |
966 | unsigned int maxabs = 0; | |
967 | for (j = 0, k = 0; j < order; j++) { | |
968 | unsigned int x = FFABS(lpc32[k]); | |
969 | if (x > maxabs) { | |
970 | maxabs = x; // Q17 | |
971 | k = j; | |
972 | } | |
973 | } | |
974 | ||
975 | maxabs = (maxabs + 16) >> 5; // convert to Q12 | |
976 | ||
977 | if (maxabs > 32767) { | |
978 | /* perform bandwidth expansion */ | |
979 | unsigned int chirp, chirp_base; // Q16 | |
980 | maxabs = FFMIN(maxabs, 163838); // anything above this overflows chirp's numerator | |
981 | chirp_base = chirp = 65470 - ((maxabs - 32767) << 14) / ((maxabs * (k+1)) >> 2); | |
982 | ||
983 | for (k = 0; k < order; k++) { | |
984 | lpc32[k] = ROUND_MULL(lpc32[k], chirp, 16); | |
985 | chirp = (chirp_base * chirp + 32768) >> 16; | |
986 | } | |
987 | } else break; | |
988 | } | |
989 | ||
990 | if (i == 10) { | |
991 | /* time's up: just clamp */ | |
992 | for (k = 0; k < order; k++) { | |
993 | int x = (lpc32[k] + 16) >> 5; | |
994 | lpc[k] = av_clip_int16(x); | |
995 | lpc32[k] = lpc[k] << 5; // shortcut mandated by the spec; drops lower 5 bits | |
996 | } | |
997 | } else { | |
998 | for (k = 0; k < order; k++) | |
999 | lpc[k] = (lpc32[k] + 16) >> 5; | |
1000 | } | |
1001 | ||
1002 | /* if the prediction gain causes the LPC filter to become unstable, | |
1003 | apply further bandwidth expansion on the Q17 coefficients */ | |
1004 | for (i = 1; i <= 16 && !silk_is_lpc_stable(lpc, order); i++) { | |
1005 | unsigned int chirp, chirp_base; | |
1006 | chirp_base = chirp = 65536 - (1 << i); | |
1007 | ||
1008 | for (k = 0; k < order; k++) { | |
1009 | lpc32[k] = ROUND_MULL(lpc32[k], chirp, 16); | |
1010 | lpc[k] = (lpc32[k] + 16) >> 5; | |
1011 | chirp = (chirp_base * chirp + 32768) >> 16; | |
1012 | } | |
1013 | } | |
1014 | ||
1015 | for (i = 0; i < order; i++) | |
1016 | lpcf[i] = lpc[i] / 4096.0f; | |
1017 | } | |
1018 | ||
1019 | static inline void silk_decode_lpc(SilkContext *s, SilkFrame *frame, | |
1020 | OpusRangeCoder *rc, | |
1021 | float lpc_leadin[16], float lpc[16], | |
1022 | int *lpc_order, int *has_lpc_leadin, int voiced) | |
1023 | { | |
1024 | int i; | |
1025 | int order; // order of the LP polynomial; 10 for NB/MB and 16 for WB | |
1026 | int8_t lsf_i1, lsf_i2[16]; // stage-1 and stage-2 codebook indices | |
1027 | int16_t lsf_res[16]; // residual as a Q10 value | |
1028 | int16_t nlsf[16]; // Q15 | |
1029 | ||
1030 | *lpc_order = order = s->wb ? 16 : 10; | |
1031 | ||
1032 | /* obtain LSF stage-1 and stage-2 indices */ | |
1033 | lsf_i1 = opus_rc_getsymbol(rc, silk_model_lsf_s1[s->wb][voiced]); | |
1034 | for (i = 0; i < order; i++) { | |
1035 | int index = s->wb ? silk_lsf_s2_model_sel_wb [lsf_i1][i] : | |
1036 | silk_lsf_s2_model_sel_nbmb[lsf_i1][i]; | |
1037 | lsf_i2[i] = opus_rc_getsymbol(rc, silk_model_lsf_s2[index]) - 4; | |
1038 | if (lsf_i2[i] == -4) | |
1039 | lsf_i2[i] -= opus_rc_getsymbol(rc, silk_model_lsf_s2_ext); | |
1040 | else if (lsf_i2[i] == 4) | |
1041 | lsf_i2[i] += opus_rc_getsymbol(rc, silk_model_lsf_s2_ext); | |
1042 | } | |
1043 | ||
1044 | /* reverse the backwards-prediction step */ | |
1045 | for (i = order - 1; i >= 0; i--) { | |
1046 | int qstep = s->wb ? 9830 : 11796; | |
1047 | ||
1048 | lsf_res[i] = lsf_i2[i] * 1024; | |
1049 | if (lsf_i2[i] < 0) lsf_res[i] += 102; | |
1050 | else if (lsf_i2[i] > 0) lsf_res[i] -= 102; | |
1051 | lsf_res[i] = (lsf_res[i] * qstep) >> 16; | |
1052 | ||
1053 | if (i + 1 < order) { | |
1054 | int weight = s->wb ? silk_lsf_pred_weights_wb [silk_lsf_weight_sel_wb [lsf_i1][i]][i] : | |
1055 | silk_lsf_pred_weights_nbmb[silk_lsf_weight_sel_nbmb[lsf_i1][i]][i]; | |
1056 | lsf_res[i] += (lsf_res[i+1] * weight) >> 8; | |
1057 | } | |
1058 | } | |
1059 | ||
1060 | /* reconstruct the NLSF coefficients from the supplied indices */ | |
1061 | for (i = 0; i < order; i++) { | |
1062 | const uint8_t * codebook = s->wb ? silk_lsf_codebook_wb [lsf_i1] : | |
1063 | silk_lsf_codebook_nbmb[lsf_i1]; | |
1064 | int cur, prev, next, weight_sq, weight, ipart, fpart, y, value; | |
1065 | ||
1066 | /* find the weight of the residual */ | |
1067 | /* TODO: precompute */ | |
1068 | cur = codebook[i]; | |
1069 | prev = i ? codebook[i - 1] : 0; | |
1070 | next = i + 1 < order ? codebook[i + 1] : 256; | |
1071 | weight_sq = (1024 / (cur - prev) + 1024 / (next - cur)) << 16; | |
1072 | ||
1073 | /* approximate square-root with mandated fixed-point arithmetic */ | |
1074 | ipart = opus_ilog(weight_sq); | |
1075 | fpart = (weight_sq >> (ipart-8)) & 127; | |
1076 | y = ((ipart & 1) ? 32768 : 46214) >> ((32 - ipart)>>1); | |
1077 | weight = y + ((213 * fpart * y) >> 16); | |
1078 | ||
1079 | value = cur * 128 + (lsf_res[i] * 16384) / weight; | |
1080 | nlsf[i] = av_clip(value, 0, 32767); | |
1081 | } | |
1082 | ||
1083 | /* stabilize the NLSF coefficients */ | |
1084 | silk_stabilize_lsf(nlsf, order, s->wb ? silk_lsf_min_spacing_wb : | |
1085 | silk_lsf_min_spacing_nbmb); | |
1086 | ||
1087 | /* produce an interpolation for the first 2 subframes, */ | |
1088 | /* and then convert both sets of NLSFs to LPC coefficients */ | |
1089 | *has_lpc_leadin = 0; | |
1090 | if (s->subframes == 4) { | |
1091 | int offset = opus_rc_getsymbol(rc, silk_model_lsf_interpolation_offset); | |
1092 | if (offset != 4 && frame->coded) { | |
1093 | *has_lpc_leadin = 1; | |
1094 | if (offset != 0) { | |
1095 | int16_t nlsf_leadin[16]; | |
1096 | for (i = 0; i < order; i++) | |
1097 | nlsf_leadin[i] = frame->nlsf[i] + | |
1098 | ((nlsf[i] - frame->nlsf[i]) * offset >> 2); | |
1099 | silk_lsf2lpc(nlsf_leadin, lpc_leadin, order); | |
1100 | } else /* avoid re-computation for a (roughly) 1-in-4 occurrence */ | |
1101 | memcpy(lpc_leadin, frame->lpc, 16 * sizeof(float)); | |
1102 | } else | |
1103 | offset = 4; | |
1104 | s->nlsf_interp_factor = offset; | |
1105 | ||
1106 | silk_lsf2lpc(nlsf, lpc, order); | |
1107 | } else { | |
1108 | s->nlsf_interp_factor = 4; | |
1109 | silk_lsf2lpc(nlsf, lpc, order); | |
1110 | } | |
1111 | ||
1112 | memcpy(frame->nlsf, nlsf, order * sizeof(nlsf[0])); | |
1113 | memcpy(frame->lpc, lpc, order * sizeof(lpc[0])); | |
1114 | } | |
1115 | ||
1116 | static inline void silk_count_children(OpusRangeCoder *rc, int model, int32_t total, | |
1117 | int32_t child[2]) | |
1118 | { | |
1119 | if (total != 0) { | |
1120 | child[0] = opus_rc_getsymbol(rc, | |
1121 | silk_model_pulse_location[model] + (((total - 1 + 5) * (total - 1)) >> 1)); | |
1122 | child[1] = total - child[0]; | |
1123 | } else { | |
1124 | child[0] = 0; | |
1125 | child[1] = 0; | |
1126 | } | |
1127 | } | |
1128 | ||
1129 | static inline void silk_decode_excitation(SilkContext *s, OpusRangeCoder *rc, | |
1130 | float* excitationf, | |
1131 | int qoffset_high, int active, int voiced) | |
1132 | { | |
1133 | int i; | |
1134 | uint32_t seed; | |
1135 | int shellblocks; | |
1136 | int ratelevel; | |
1137 | uint8_t pulsecount[20]; // total pulses in each shell block | |
1138 | uint8_t lsbcount[20] = {0}; // raw lsbits defined for each pulse in each shell block | |
1139 | int32_t excitation[320]; // Q23 | |
1140 | ||
1141 | /* excitation parameters */ | |
1142 | seed = opus_rc_getsymbol(rc, silk_model_lcg_seed); | |
1143 | shellblocks = silk_shell_blocks[s->bandwidth][s->subframes >> 2]; | |
1144 | ratelevel = opus_rc_getsymbol(rc, silk_model_exc_rate[voiced]); | |
1145 | ||
1146 | for (i = 0; i < shellblocks; i++) { | |
1147 | pulsecount[i] = opus_rc_getsymbol(rc, silk_model_pulse_count[ratelevel]); | |
1148 | if (pulsecount[i] == 17) { | |
1149 | while (pulsecount[i] == 17 && ++lsbcount[i] != 10) | |
1150 | pulsecount[i] = opus_rc_getsymbol(rc, silk_model_pulse_count[9]); | |
1151 | if (lsbcount[i] == 10) | |
1152 | pulsecount[i] = opus_rc_getsymbol(rc, silk_model_pulse_count[10]); | |
1153 | } | |
1154 | } | |
1155 | ||
1156 | /* decode pulse locations using PVQ */ | |
1157 | for (i = 0; i < shellblocks; i++) { | |
1158 | if (pulsecount[i] != 0) { | |
1159 | int a, b, c, d; | |
1160 | int32_t * location = excitation + 16*i; | |
1161 | int32_t branch[4][2]; | |
1162 | branch[0][0] = pulsecount[i]; | |
1163 | ||
1164 | /* unrolled tail recursion */ | |
1165 | for (a = 0; a < 1; a++) { | |
1166 | silk_count_children(rc, 0, branch[0][a], branch[1]); | |
1167 | for (b = 0; b < 2; b++) { | |
1168 | silk_count_children(rc, 1, branch[1][b], branch[2]); | |
1169 | for (c = 0; c < 2; c++) { | |
1170 | silk_count_children(rc, 2, branch[2][c], branch[3]); | |
1171 | for (d = 0; d < 2; d++) { | |
1172 | silk_count_children(rc, 3, branch[3][d], location); | |
1173 | location += 2; | |
1174 | } | |
1175 | } | |
1176 | } | |
1177 | } | |
1178 | } else | |
1179 | memset(excitation + 16*i, 0, 16*sizeof(int32_t)); | |
1180 | } | |
1181 | ||
1182 | /* decode least significant bits */ | |
1183 | for (i = 0; i < shellblocks << 4; i++) { | |
1184 | int bit; | |
1185 | for (bit = 0; bit < lsbcount[i >> 4]; bit++) | |
1186 | excitation[i] = (excitation[i] << 1) | | |
1187 | opus_rc_getsymbol(rc, silk_model_excitation_lsb); | |
1188 | } | |
1189 | ||
1190 | /* decode signs */ | |
1191 | for (i = 0; i < shellblocks << 4; i++) { | |
1192 | if (excitation[i] != 0) { | |
1193 | int sign = opus_rc_getsymbol(rc, silk_model_excitation_sign[active + | |
1194 | voiced][qoffset_high][FFMIN(pulsecount[i >> 4], 6)]); | |
1195 | if (sign == 0) | |
1196 | excitation[i] *= -1; | |
1197 | } | |
1198 | } | |
1199 | ||
1200 | /* assemble the excitation */ | |
1201 | for (i = 0; i < shellblocks << 4; i++) { | |
1202 | int value = excitation[i]; | |
1203 | excitation[i] = value * 256 | silk_quant_offset[voiced][qoffset_high]; | |
1204 | if (value < 0) excitation[i] += 20; | |
1205 | else if (value > 0) excitation[i] -= 20; | |
1206 | ||
1207 | /* invert samples pseudorandomly */ | |
1208 | seed = 196314165 * seed + 907633515; | |
1209 | if (seed & 0x80000000) | |
1210 | excitation[i] *= -1; | |
1211 | seed += value; | |
1212 | ||
1213 | excitationf[i] = excitation[i] / 8388608.0f; | |
1214 | } | |
1215 | } | |
1216 | ||
1217 | /** Maximum residual history according to 4.2.7.6.1 */ | |
1218 | #define SILK_MAX_LAG (288 + LTP_ORDER / 2) | |
1219 | ||
1220 | /** Order of the LTP filter */ | |
1221 | #define LTP_ORDER 5 | |
1222 | ||
1223 | static void silk_decode_frame(SilkContext *s, OpusRangeCoder *rc, | |
1224 | int frame_num, int channel, int coded_channels, int active, int active1) | |
1225 | { | |
1226 | /* per frame */ | |
1227 | int voiced; // combines with active to indicate inactive, active, or active+voiced | |
1228 | int qoffset_high; | |
1229 | int order; // order of the LPC coefficients | |
1230 | float lpc_leadin[16], lpc_body[16], residual[SILK_MAX_LAG + SILK_HISTORY]; | |
1231 | int has_lpc_leadin; | |
1232 | float ltpscale; | |
1233 | ||
1234 | /* per subframe */ | |
1235 | struct { | |
1236 | float gain; | |
1237 | int pitchlag; | |
1238 | float ltptaps[5]; | |
1239 | } sf[4]; | |
1240 | ||
1241 | SilkFrame * const frame = s->frame + channel; | |
1242 | ||
1243 | int i; | |
1244 | ||
1245 | /* obtain stereo weights */ | |
1246 | if (coded_channels == 2 && channel == 0) { | |
1247 | int n, wi[2], ws[2], w[2]; | |
1248 | n = opus_rc_getsymbol(rc, silk_model_stereo_s1); | |
1249 | wi[0] = opus_rc_getsymbol(rc, silk_model_stereo_s2) + 3 * (n / 5); | |
1250 | ws[0] = opus_rc_getsymbol(rc, silk_model_stereo_s3); | |
1251 | wi[1] = opus_rc_getsymbol(rc, silk_model_stereo_s2) + 3 * (n % 5); | |
1252 | ws[1] = opus_rc_getsymbol(rc, silk_model_stereo_s3); | |
1253 | ||
1254 | for (i = 0; i < 2; i++) | |
1255 | w[i] = silk_stereo_weights[wi[i]] + | |
1256 | (((silk_stereo_weights[wi[i] + 1] - silk_stereo_weights[wi[i]]) * 6554) >> 16) | |
1257 | * (ws[i]*2 + 1); | |
1258 | ||
1259 | s->stereo_weights[0] = (w[0] - w[1]) / 8192.0; | |
1260 | s->stereo_weights[1] = w[1] / 8192.0; | |
1261 | ||
1262 | /* and read the mid-only flag */ | |
1263 | s->midonly = active1 ? 0 : opus_rc_getsymbol(rc, silk_model_mid_only); | |
1264 | } | |
1265 | ||
1266 | /* obtain frame type */ | |
1267 | if (!active) { | |
1268 | qoffset_high = opus_rc_getsymbol(rc, silk_model_frame_type_inactive); | |
1269 | voiced = 0; | |
1270 | } else { | |
1271 | int type = opus_rc_getsymbol(rc, silk_model_frame_type_active); | |
1272 | qoffset_high = type & 1; | |
1273 | voiced = type >> 1; | |
1274 | } | |
1275 | ||
1276 | /* obtain subframe quantization gains */ | |
1277 | for (i = 0; i < s->subframes; i++) { | |
1278 | int log_gain; //Q7 | |
1279 | int ipart, fpart, lingain; | |
1280 | ||
1281 | if (i == 0 && (frame_num == 0 || !frame->coded)) { | |
1282 | /* gain is coded absolute */ | |
1283 | int x = opus_rc_getsymbol(rc, silk_model_gain_highbits[active + voiced]); | |
1284 | log_gain = (x<<3) | opus_rc_getsymbol(rc, silk_model_gain_lowbits); | |
1285 | ||
1286 | if (frame->coded) | |
1287 | log_gain = FFMAX(log_gain, frame->log_gain - 16); | |
1288 | } else { | |
1289 | /* gain is coded relative */ | |
1290 | int delta_gain = opus_rc_getsymbol(rc, silk_model_gain_delta); | |
1291 | log_gain = av_clip(FFMAX((delta_gain<<1) - 16, | |
1292 | frame->log_gain + delta_gain - 4), 0, 63); | |
1293 | } | |
1294 | ||
1295 | frame->log_gain = log_gain; | |
1296 | ||
1297 | /* approximate 2**(x/128) with a Q7 (i.e. non-integer) input */ | |
1298 | log_gain = (log_gain * 0x1D1C71 >> 16) + 2090; | |
1299 | ipart = log_gain >> 7; | |
1300 | fpart = log_gain & 127; | |
1301 | lingain = (1 << ipart) + ((-174 * fpart * (128-fpart) >>16) + fpart) * ((1<<ipart) >> 7); | |
1302 | sf[i].gain = lingain / 65536.0f; | |
1303 | } | |
1304 | ||
1305 | /* obtain LPC filter coefficients */ | |
1306 | silk_decode_lpc(s, frame, rc, lpc_leadin, lpc_body, &order, &has_lpc_leadin, voiced); | |
1307 | ||
1308 | /* obtain pitch lags, if this is a voiced frame */ | |
1309 | if (voiced) { | |
1310 | int lag_absolute = (!frame_num || !frame->prev_voiced); | |
1311 | int primarylag; // primary pitch lag for the entire SILK frame | |
1312 | int ltpfilter; | |
1313 | const int8_t * offsets; | |
1314 | ||
1315 | if (!lag_absolute) { | |
1316 | int delta = opus_rc_getsymbol(rc, silk_model_pitch_delta); | |
1317 | if (delta) | |
1318 | primarylag = frame->primarylag + delta - 9; | |
1319 | else | |
1320 | lag_absolute = 1; | |
1321 | } | |
1322 | ||
1323 | if (lag_absolute) { | |
1324 | /* primary lag is coded absolute */ | |
1325 | int highbits, lowbits; | |
1326 | const uint16_t *model[] = { | |
1327 | silk_model_pitch_lowbits_nb, silk_model_pitch_lowbits_mb, | |
1328 | silk_model_pitch_lowbits_wb | |
1329 | }; | |
1330 | highbits = opus_rc_getsymbol(rc, silk_model_pitch_highbits); | |
1331 | lowbits = opus_rc_getsymbol(rc, model[s->bandwidth]); | |
1332 | ||
1333 | primarylag = silk_pitch_min_lag[s->bandwidth] + | |
1334 | highbits*silk_pitch_scale[s->bandwidth] + lowbits; | |
1335 | } | |
1336 | frame->primarylag = primarylag; | |
1337 | ||
1338 | if (s->subframes == 2) | |
1339 | offsets = (s->bandwidth == OPUS_BANDWIDTH_NARROWBAND) | |
1340 | ? silk_pitch_offset_nb10ms[opus_rc_getsymbol(rc, | |
1341 | silk_model_pitch_contour_nb10ms)] | |
1342 | : silk_pitch_offset_mbwb10ms[opus_rc_getsymbol(rc, | |
1343 | silk_model_pitch_contour_mbwb10ms)]; | |
1344 | else | |
1345 | offsets = (s->bandwidth == OPUS_BANDWIDTH_NARROWBAND) | |
1346 | ? silk_pitch_offset_nb20ms[opus_rc_getsymbol(rc, | |
1347 | silk_model_pitch_contour_nb20ms)] | |
1348 | : silk_pitch_offset_mbwb20ms[opus_rc_getsymbol(rc, | |
1349 | silk_model_pitch_contour_mbwb20ms)]; | |
1350 | ||
1351 | for (i = 0; i < s->subframes; i++) | |
1352 | sf[i].pitchlag = av_clip(primarylag + offsets[i], | |
1353 | silk_pitch_min_lag[s->bandwidth], | |
1354 | silk_pitch_max_lag[s->bandwidth]); | |
1355 | ||
1356 | /* obtain LTP filter coefficients */ | |
1357 | ltpfilter = opus_rc_getsymbol(rc, silk_model_ltp_filter); | |
1358 | for (i = 0; i < s->subframes; i++) { | |
1359 | int index, j; | |
1360 | const uint16_t *filter_sel[] = { | |
1361 | silk_model_ltp_filter0_sel, silk_model_ltp_filter1_sel, | |
1362 | silk_model_ltp_filter2_sel | |
1363 | }; | |
1364 | const int8_t (*filter_taps[])[5] = { | |
1365 | silk_ltp_filter0_taps, silk_ltp_filter1_taps, silk_ltp_filter2_taps | |
1366 | }; | |
1367 | index = opus_rc_getsymbol(rc, filter_sel[ltpfilter]); | |
1368 | for (j = 0; j < 5; j++) | |
1369 | sf[i].ltptaps[j] = filter_taps[ltpfilter][index][j] / 128.0f; | |
1370 | } | |
1371 | } | |
1372 | ||
1373 | /* obtain LTP scale factor */ | |
1374 | if (voiced && frame_num == 0) | |
1375 | ltpscale = silk_ltp_scale_factor[opus_rc_getsymbol(rc, | |
1376 | silk_model_ltp_scale_index)] / 16384.0f; | |
1377 | else ltpscale = 15565.0f/16384.0f; | |
1378 | ||
1379 | /* generate the excitation signal for the entire frame */ | |
1380 | silk_decode_excitation(s, rc, residual + SILK_MAX_LAG, qoffset_high, | |
1381 | active, voiced); | |
1382 | ||
1383 | /* skip synthesising the side channel if we want mono-only */ | |
1384 | if (s->output_channels == channel) | |
1385 | return; | |
1386 | ||
1387 | /* generate the output signal */ | |
1388 | for (i = 0; i < s->subframes; i++) { | |
1389 | const float * lpc_coeff = (i < 2 && has_lpc_leadin) ? lpc_leadin : lpc_body; | |
1390 | float *dst = frame->output + SILK_HISTORY + i * s->sflength; | |
1391 | float *resptr = residual + SILK_MAX_LAG + i * s->sflength; | |
1392 | float *lpc = frame->lpc_history + SILK_HISTORY + i * s->sflength; | |
1393 | float sum; | |
1394 | int j, k; | |
1395 | ||
1396 | if (voiced) { | |
1397 | int out_end; | |
1398 | float scale; | |
1399 | ||
1400 | if (i < 2 || s->nlsf_interp_factor == 4) { | |
1401 | out_end = -i * s->sflength; | |
1402 | scale = ltpscale; | |
1403 | } else { | |
1404 | out_end = -(i - 2) * s->sflength; | |
1405 | scale = 1.0f; | |
1406 | } | |
1407 | ||
1408 | /* when the LPC coefficients change, a re-whitening filter is used */ | |
1409 | /* to produce a residual that accounts for the change */ | |
1410 | for (j = - sf[i].pitchlag - LTP_ORDER/2; j < out_end; j++) { | |
1411 | sum = dst[j]; | |
1412 | for (k = 0; k < order; k++) | |
1413 | sum -= lpc_coeff[k] * dst[j - k - 1]; | |
1414 | resptr[j] = av_clipf(sum, -1.0f, 1.0f) * scale / sf[i].gain; | |
1415 | } | |
1416 | ||
1417 | if (out_end) { | |
1418 | float rescale = sf[i-1].gain / sf[i].gain; | |
1419 | for (j = out_end; j < 0; j++) | |
1420 | resptr[j] *= rescale; | |
1421 | } | |
1422 | ||
1423 | /* LTP synthesis */ | |
1424 | for (j = 0; j < s->sflength; j++) { | |
1425 | sum = resptr[j]; | |
1426 | for (k = 0; k < LTP_ORDER; k++) | |
1427 | sum += sf[i].ltptaps[k] * resptr[j - sf[i].pitchlag + LTP_ORDER/2 - k]; | |
1428 | resptr[j] = sum; | |
1429 | } | |
1430 | } | |
1431 | ||
1432 | /* LPC synthesis */ | |
1433 | for (j = 0; j < s->sflength; j++) { | |
1434 | sum = resptr[j] * sf[i].gain; | |
1435 | for (k = 1; k <= order; k++) | |
1436 | sum += lpc_coeff[k - 1] * lpc[j - k]; | |
1437 | ||
1438 | lpc[j] = sum; | |
1439 | dst[j] = av_clipf(sum, -1.0f, 1.0f); | |
1440 | } | |
1441 | } | |
1442 | ||
1443 | frame->prev_voiced = voiced; | |
1444 | memmove(frame->lpc_history, frame->lpc_history + s->flength, SILK_HISTORY * sizeof(float)); | |
1445 | memmove(frame->output, frame->output + s->flength, SILK_HISTORY * sizeof(float)); | |
1446 | ||
1447 | frame->coded = 1; | |
1448 | } | |
1449 | ||
1450 | static void silk_unmix_ms(SilkContext *s, float *l, float *r) | |
1451 | { | |
1452 | float *mid = s->frame[0].output + SILK_HISTORY - s->flength; | |
1453 | float *side = s->frame[1].output + SILK_HISTORY - s->flength; | |
1454 | float w0_prev = s->prev_stereo_weights[0]; | |
1455 | float w1_prev = s->prev_stereo_weights[1]; | |
1456 | float w0 = s->stereo_weights[0]; | |
1457 | float w1 = s->stereo_weights[1]; | |
1458 | int n1 = silk_stereo_interp_len[s->bandwidth]; | |
1459 | int i; | |
1460 | ||
1461 | for (i = 0; i < n1; i++) { | |
1462 | float interp0 = w0_prev + i * (w0 - w0_prev) / n1; | |
1463 | float interp1 = w1_prev + i * (w1 - w1_prev) / n1; | |
1464 | float p0 = 0.25 * (mid[i - 2] + 2 * mid[i - 1] + mid[i]); | |
1465 | ||
1466 | l[i] = av_clipf((1 + interp1) * mid[i - 1] + side[i - 1] + interp0 * p0, -1.0, 1.0); | |
1467 | r[i] = av_clipf((1 - interp1) * mid[i - 1] - side[i - 1] - interp0 * p0, -1.0, 1.0); | |
1468 | } | |
1469 | ||
1470 | for (; i < s->flength; i++) { | |
1471 | float p0 = 0.25 * (mid[i - 2] + 2 * mid[i - 1] + mid[i]); | |
1472 | ||
1473 | l[i] = av_clipf((1 + w1) * mid[i - 1] + side[i - 1] + w0 * p0, -1.0, 1.0); | |
1474 | r[i] = av_clipf((1 - w1) * mid[i - 1] - side[i - 1] - w0 * p0, -1.0, 1.0); | |
1475 | } | |
1476 | ||
1477 | memcpy(s->prev_stereo_weights, s->stereo_weights, sizeof(s->stereo_weights)); | |
1478 | } | |
1479 | ||
1480 | static void silk_flush_frame(SilkFrame *frame) | |
1481 | { | |
1482 | if (!frame->coded) | |
1483 | return; | |
1484 | ||
1485 | memset(frame->output, 0, sizeof(frame->output)); | |
1486 | memset(frame->lpc_history, 0, sizeof(frame->lpc_history)); | |
1487 | ||
1488 | memset(frame->lpc, 0, sizeof(frame->lpc)); | |
1489 | memset(frame->nlsf, 0, sizeof(frame->nlsf)); | |
1490 | ||
1491 | frame->log_gain = 0; | |
1492 | ||
1493 | frame->primarylag = 0; | |
1494 | frame->prev_voiced = 0; | |
1495 | frame->coded = 0; | |
1496 | } | |
1497 | ||
1498 | int ff_silk_decode_superframe(SilkContext *s, OpusRangeCoder *rc, | |
1499 | float *output[2], | |
1500 | enum OpusBandwidth bandwidth, | |
1501 | int coded_channels, | |
1502 | int duration_ms) | |
1503 | { | |
1504 | int active[2][6], redundancy[2]; | |
1505 | int nb_frames, i, j; | |
1506 | ||
1507 | if (bandwidth > OPUS_BANDWIDTH_WIDEBAND || | |
1508 | coded_channels > 2 || duration_ms > 60) { | |
1509 | av_log(s->avctx, AV_LOG_ERROR, "Invalid parameters passed " | |
1510 | "to the SILK decoder.\n"); | |
1511 | return AVERROR(EINVAL); | |
1512 | } | |
1513 | ||
1514 | nb_frames = 1 + (duration_ms > 20) + (duration_ms > 40); | |
1515 | s->subframes = duration_ms / nb_frames / 5; // 5ms subframes | |
1516 | s->sflength = 20 * (bandwidth + 2); | |
1517 | s->flength = s->sflength * s->subframes; | |
1518 | s->bandwidth = bandwidth; | |
1519 | s->wb = bandwidth == OPUS_BANDWIDTH_WIDEBAND; | |
1520 | ||
1521 | /* make sure to flush the side channel when switching from mono to stereo */ | |
1522 | if (coded_channels > s->prev_coded_channels) | |
1523 | silk_flush_frame(&s->frame[1]); | |
1524 | s->prev_coded_channels = coded_channels; | |
1525 | ||
1526 | /* read the LP-layer header bits */ | |
1527 | for (i = 0; i < coded_channels; i++) { | |
1528 | for (j = 0; j < nb_frames; j++) | |
1529 | active[i][j] = opus_rc_p2model(rc, 1); | |
1530 | ||
1531 | redundancy[i] = opus_rc_p2model(rc, 1); | |
1532 | if (redundancy[i]) { | |
1533 | av_log(s->avctx, AV_LOG_ERROR, "LBRR frames present; this is unsupported\n"); | |
1534 | return AVERROR_PATCHWELCOME; | |
1535 | } | |
1536 | } | |
1537 | ||
1538 | for (i = 0; i < nb_frames; i++) { | |
1539 | for (j = 0; j < coded_channels && !s->midonly; j++) | |
1540 | silk_decode_frame(s, rc, i, j, coded_channels, active[j][i], active[1][i]); | |
1541 | ||
1542 | /* reset the side channel if it is not coded */ | |
1543 | if (s->midonly && s->frame[1].coded) | |
1544 | silk_flush_frame(&s->frame[1]); | |
1545 | ||
1546 | if (coded_channels == 1 || s->output_channels == 1) { | |
1547 | for (j = 0; j < s->output_channels; j++) { | |
1548 | memcpy(output[j] + i * s->flength, | |
1549 | s->frame[0].output + SILK_HISTORY - s->flength - 2, | |
1550 | s->flength * sizeof(float)); | |
1551 | } | |
1552 | } else { | |
1553 | silk_unmix_ms(s, output[0] + i * s->flength, output[1] + i * s->flength); | |
1554 | } | |
1555 | ||
1556 | s->midonly = 0; | |
1557 | } | |
1558 | ||
1559 | return nb_frames * s->flength; | |
1560 | } | |
1561 | ||
1562 | void ff_silk_free(SilkContext **ps) | |
1563 | { | |
1564 | av_freep(ps); | |
1565 | } | |
1566 | ||
1567 | void ff_silk_flush(SilkContext *s) | |
1568 | { | |
1569 | silk_flush_frame(&s->frame[0]); | |
1570 | silk_flush_frame(&s->frame[1]); | |
1571 | ||
1572 | memset(s->prev_stereo_weights, 0, sizeof(s->prev_stereo_weights)); | |
1573 | } | |
1574 | ||
1575 | int ff_silk_init(AVCodecContext *avctx, SilkContext **ps, int output_channels) | |
1576 | { | |
1577 | SilkContext *s; | |
1578 | ||
1579 | if (output_channels != 1 && output_channels != 2) { | |
1580 | av_log(avctx, AV_LOG_ERROR, "Invalid number of output channels: %d\n", | |
1581 | output_channels); | |
1582 | return AVERROR(EINVAL); | |
1583 | } | |
1584 | ||
1585 | s = av_mallocz(sizeof(*s)); | |
1586 | if (!s) | |
1587 | return AVERROR(ENOMEM); | |
1588 | ||
1589 | s->avctx = avctx; | |
1590 | s->output_channels = output_channels; | |
1591 | ||
1592 | ff_silk_flush(s); | |
1593 | ||
1594 | *ps = s; | |
1595 | ||
1596 | return 0; | |
1597 | } |