1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
|
/*
*
* Bluetooth low-complexity, subband codec (SBC) library
*
* Copyright (C) 2004-2009 Marcel Holtmann <marcel@holtmann.org>
* Copyright (C) 2004-2005 Henryk Ploetz <henryk@ploetzli.ch>
* Copyright (C) 2005-2006 Brad Midgley <bmidgley@xmission.com>
*
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
/* A2DP specification: Appendix B, page 69 */
static const int sbc_offset4[4][4] = {
{ -1, 0, 0, 0 },
{ -2, 0, 0, 1 },
{ -2, 0, 0, 1 },
{ -2, 0, 0, 1 }
};
/* A2DP specification: Appendix B, page 69 */
static const int sbc_offset8[4][8] = {
{ -2, 0, 0, 0, 0, 0, 0, 1 },
{ -3, 0, 0, 0, 0, 0, 1, 2 },
{ -4, 0, 0, 0, 0, 0, 1, 2 },
{ -4, 0, 0, 0, 0, 0, 1, 2 }
};
#define SS4(val) ASR(val, SCALE_SPROTO4_TBL)
#define SS8(val) ASR(val, SCALE_SPROTO8_TBL)
#define SN4(val) ASR(val, SCALE_NPROTO4_TBL)
#define SN8(val) ASR(val, SCALE_NPROTO8_TBL)
static const int32_t sbc_proto_4_40m0[] = {
SS4(0x00000000), SS4(0xffa6982f), SS4(0xfba93848), SS4(0x0456c7b8),
SS4(0x005967d1), SS4(0xfffb9ac7), SS4(0xff589157), SS4(0xf9c2a8d8),
SS4(0x027c1434), SS4(0x0019118b), SS4(0xfff3c74c), SS4(0xff137330),
SS4(0xf81b8d70), SS4(0x00ec1b8b), SS4(0xfff0b71a), SS4(0xffe99b00),
SS4(0xfef84470), SS4(0xf6fb4370), SS4(0xffcdc351), SS4(0xffe01dc7)
};
static const int32_t sbc_proto_4_40m1[] = {
SS4(0xffe090ce), SS4(0xff2c0475), SS4(0xf694f800), SS4(0xff2c0475),
SS4(0xffe090ce), SS4(0xffe01dc7), SS4(0xffcdc351), SS4(0xf6fb4370),
SS4(0xfef84470), SS4(0xffe99b00), SS4(0xfff0b71a), SS4(0x00ec1b8b),
SS4(0xf81b8d70), SS4(0xff137330), SS4(0xfff3c74c), SS4(0x0019118b),
SS4(0x027c1434), SS4(0xf9c2a8d8), SS4(0xff589157), SS4(0xfffb9ac7)
};
static const int32_t sbc_proto_8_80m0[] = {
SS8(0x00000000), SS8(0xfe8d1970), SS8(0xee979f00), SS8(0x11686100),
SS8(0x0172e690), SS8(0xfff5bd1a), SS8(0xfdf1c8d4), SS8(0xeac182c0),
SS8(0x0d9daee0), SS8(0x00e530da), SS8(0xffe9811d), SS8(0xfd52986c),
SS8(0xe7054ca0), SS8(0x0a00d410), SS8(0x006c1de4), SS8(0xffdba705),
SS8(0xfcbc98e8), SS8(0xe3889d20), SS8(0x06af2308), SS8(0x000bb7db),
SS8(0xffca00ed), SS8(0xfc3fbb68), SS8(0xe071bc00), SS8(0x03bf7948),
SS8(0xffc4e05c), SS8(0xffb54b3b), SS8(0xfbedadc0), SS8(0xdde26200),
SS8(0x0142291c), SS8(0xff960e94), SS8(0xff9f3e17), SS8(0xfbd8f358),
SS8(0xdbf79400), SS8(0xff405e01), SS8(0xff7d4914), SS8(0xff8b1a31),
SS8(0xfc1417b8), SS8(0xdac7bb40), SS8(0xfdbb828c), SS8(0xff762170)
};
static const int32_t sbc_proto_8_80m1[] = {
SS8(0xff7c272c), SS8(0xfcb02620), SS8(0xda612700), SS8(0xfcb02620),
SS8(0xff7c272c), SS8(0xff762170), SS8(0xfdbb828c), SS8(0xdac7bb40),
SS8(0xfc1417b8), SS8(0xff8b1a31), SS8(0xff7d4914), SS8(0xff405e01),
SS8(0xdbf79400), SS8(0xfbd8f358), SS8(0xff9f3e17), SS8(0xff960e94),
SS8(0x0142291c), SS8(0xdde26200), SS8(0xfbedadc0), SS8(0xffb54b3b),
SS8(0xffc4e05c), SS8(0x03bf7948), SS8(0xe071bc00), SS8(0xfc3fbb68),
SS8(0xffca00ed), SS8(0x000bb7db), SS8(0x06af2308), SS8(0xe3889d20),
SS8(0xfcbc98e8), SS8(0xffdba705), SS8(0x006c1de4), SS8(0x0a00d410),
SS8(0xe7054ca0), SS8(0xfd52986c), SS8(0xffe9811d), SS8(0x00e530da),
SS8(0x0d9daee0), SS8(0xeac182c0), SS8(0xfdf1c8d4), SS8(0xfff5bd1a)
};
static const int32_t synmatrix4[8][4] = {
{ SN4(0x05a82798), SN4(0xfa57d868), SN4(0xfa57d868), SN4(0x05a82798) },
{ SN4(0x030fbc54), SN4(0xf89be510), SN4(0x07641af0), SN4(0xfcf043ac) },
{ SN4(0x00000000), SN4(0x00000000), SN4(0x00000000), SN4(0x00000000) },
{ SN4(0xfcf043ac), SN4(0x07641af0), SN4(0xf89be510), SN4(0x030fbc54) },
{ SN4(0xfa57d868), SN4(0x05a82798), SN4(0x05a82798), SN4(0xfa57d868) },
{ SN4(0xf89be510), SN4(0xfcf043ac), SN4(0x030fbc54), SN4(0x07641af0) },
{ SN4(0xf8000000), SN4(0xf8000000), SN4(0xf8000000), SN4(0xf8000000) },
{ SN4(0xf89be510), SN4(0xfcf043ac), SN4(0x030fbc54), SN4(0x07641af0) }
};
static const int32_t synmatrix8[16][8] = {
{ SN8(0x05a82798), SN8(0xfa57d868), SN8(0xfa57d868), SN8(0x05a82798),
SN8(0x05a82798), SN8(0xfa57d868), SN8(0xfa57d868), SN8(0x05a82798) },
{ SN8(0x0471ced0), SN8(0xf8275a10), SN8(0x018f8b84), SN8(0x06a6d988),
SN8(0xf9592678), SN8(0xfe70747c), SN8(0x07d8a5f0), SN8(0xfb8e3130) },
{ SN8(0x030fbc54), SN8(0xf89be510), SN8(0x07641af0), SN8(0xfcf043ac),
SN8(0xfcf043ac), SN8(0x07641af0), SN8(0xf89be510), SN8(0x030fbc54) },
{ SN8(0x018f8b84), SN8(0xfb8e3130), SN8(0x06a6d988), SN8(0xf8275a10),
SN8(0x07d8a5f0), SN8(0xf9592678), SN8(0x0471ced0), SN8(0xfe70747c) },
{ SN8(0x00000000), SN8(0x00000000), SN8(0x00000000), SN8(0x00000000),
SN8(0x00000000), SN8(0x00000000), SN8(0x00000000), SN8(0x00000000) },
{ SN8(0xfe70747c), SN8(0x0471ced0), SN8(0xf9592678), SN8(0x07d8a5f0),
SN8(0xf8275a10), SN8(0x06a6d988), SN8(0xfb8e3130), SN8(0x018f8b84) },
{ SN8(0xfcf043ac), SN8(0x07641af0), SN8(0xf89be510), SN8(0x030fbc54),
SN8(0x030fbc54), SN8(0xf89be510), SN8(0x07641af0), SN8(0xfcf043ac) },
{ SN8(0xfb8e3130), SN8(0x07d8a5f0), SN8(0xfe70747c), SN8(0xf9592678),
SN8(0x06a6d988), SN8(0x018f8b84), SN8(0xf8275a10), SN8(0x0471ced0) },
{ SN8(0xfa57d868), SN8(0x05a82798), SN8(0x05a82798), SN8(0xfa57d868),
SN8(0xfa57d868), SN8(0x05a82798), SN8(0x05a82798), SN8(0xfa57d868) },
{ SN8(0xf9592678), SN8(0x018f8b84), SN8(0x07d8a5f0), SN8(0x0471ced0),
SN8(0xfb8e3130), SN8(0xf8275a10), SN8(0xfe70747c), SN8(0x06a6d988) },
{ SN8(0xf89be510), SN8(0xfcf043ac), SN8(0x030fbc54), SN8(0x07641af0),
SN8(0x07641af0), SN8(0x030fbc54), SN8(0xfcf043ac), SN8(0xf89be510) },
{ SN8(0xf8275a10), SN8(0xf9592678), SN8(0xfb8e3130), SN8(0xfe70747c),
SN8(0x018f8b84), SN8(0x0471ced0), SN8(0x06a6d988), SN8(0x07d8a5f0) },
{ SN8(0xf8000000), SN8(0xf8000000), SN8(0xf8000000), SN8(0xf8000000),
SN8(0xf8000000), SN8(0xf8000000), SN8(0xf8000000), SN8(0xf8000000) },
{ SN8(0xf8275a10), SN8(0xf9592678), SN8(0xfb8e3130), SN8(0xfe70747c),
SN8(0x018f8b84), SN8(0x0471ced0), SN8(0x06a6d988), SN8(0x07d8a5f0) },
{ SN8(0xf89be510), SN8(0xfcf043ac), SN8(0x030fbc54), SN8(0x07641af0),
SN8(0x07641af0), SN8(0x030fbc54), SN8(0xfcf043ac), SN8(0xf89be510) },
{ SN8(0xf9592678), SN8(0x018f8b84), SN8(0x07d8a5f0), SN8(0x0471ced0),
SN8(0xfb8e3130), SN8(0xf8275a10), SN8(0xfe70747c), SN8(0x06a6d988) }
};
/* Uncomment the following line to enable high precision build of SBC encoder */
/* #define SBC_HIGH_PRECISION */
#ifdef SBC_HIGH_PRECISION
#define FIXED_A int64_t /* data type for fixed point accumulator */
#define FIXED_T int32_t /* data type for fixed point constants */
#define SBC_FIXED_EXTRA_BITS 16
#else
#define FIXED_A int32_t /* data type for fixed point accumulator */
#define FIXED_T int16_t /* data type for fixed point constants */
#define SBC_FIXED_EXTRA_BITS 0
#endif
/* A2DP specification: Section 12.8 Tables
*
* Original values are premultiplied by 2 for better precision (that is the
* maximum which is possible without overflows)
*
* Note: in each block of 8 numbers sign was changed for elements 2 and 7
* in order to compensate the same change applied to cos_table_fixed_4
*/
#define SBC_PROTO_FIXED4_SCALE \
((sizeof(FIXED_T) * CHAR_BIT - 1) - SBC_FIXED_EXTRA_BITS + 1)
#define F(x) (FIXED_A) ((x * 2) * \
((FIXED_A) 1 << (sizeof(FIXED_T) * CHAR_BIT - 1)) + 0.5)
static const FIXED_T _sbc_proto_fixed4[40] = {
F(0.00000000E+00), F(5.36548976E-04),
-F(1.49188357E-03), F(2.73370904E-03),
F(3.83720193E-03), F(3.89205149E-03),
F(1.86581691E-03), F(3.06012286E-03),
F(1.09137620E-02), F(2.04385087E-02),
-F(2.88757392E-02), F(3.21939290E-02),
F(2.58767811E-02), F(6.13245186E-03),
-F(2.88217274E-02), F(7.76463494E-02),
F(1.35593274E-01), F(1.94987841E-01),
-F(2.46636662E-01), F(2.81828203E-01),
F(2.94315332E-01), F(2.81828203E-01),
F(2.46636662E-01), -F(1.94987841E-01),
-F(1.35593274E-01), -F(7.76463494E-02),
F(2.88217274E-02), F(6.13245186E-03),
F(2.58767811E-02), F(3.21939290E-02),
F(2.88757392E-02), -F(2.04385087E-02),
-F(1.09137620E-02), -F(3.06012286E-03),
-F(1.86581691E-03), F(3.89205149E-03),
F(3.83720193E-03), F(2.73370904E-03),
F(1.49188357E-03), -F(5.36548976E-04),
};
#undef F
/*
* To produce this cosine matrix in Octave:
*
* b = zeros(4, 8);
* for i = 0:3
* for j = 0:7 b(i+1, j+1) = cos((i + 0.5) * (j - 2) * (pi/4))
* endfor
* endfor;
* printf("%.10f, ", b');
*
* Note: in each block of 8 numbers sign was changed for elements 2 and 7
*
* Change of sign for element 2 allows to replace constant 1.0 (not
* representable in Q15 format) with -1.0 (fine with Q15).
* Changed sign for element 7 allows to have more similar constants
* and simplify subband filter function code.
*/
#define SBC_COS_TABLE_FIXED4_SCALE \
((sizeof(FIXED_T) * CHAR_BIT - 1) + SBC_FIXED_EXTRA_BITS)
#define F(x) (FIXED_A) ((x) * \
((FIXED_A) 1 << (sizeof(FIXED_T) * CHAR_BIT - 1)) + 0.5)
static const FIXED_T cos_table_fixed_4[32] = {
F(0.7071067812), F(0.9238795325), -F(1.0000000000), F(0.9238795325),
F(0.7071067812), F(0.3826834324), F(0.0000000000), F(0.3826834324),
-F(0.7071067812), F(0.3826834324), -F(1.0000000000), F(0.3826834324),
-F(0.7071067812), -F(0.9238795325), -F(0.0000000000), -F(0.9238795325),
-F(0.7071067812), -F(0.3826834324), -F(1.0000000000), -F(0.3826834324),
-F(0.7071067812), F(0.9238795325), F(0.0000000000), F(0.9238795325),
F(0.7071067812), -F(0.9238795325), -F(1.0000000000), -F(0.9238795325),
F(0.7071067812), -F(0.3826834324), -F(0.0000000000), -F(0.3826834324),
};
#undef F
/* A2DP specification: Section 12.8 Tables
*
* Original values are premultiplied by 4 for better precision (that is the
* maximum which is possible without overflows)
*
* Note: in each block of 16 numbers sign was changed for elements 4, 13, 14, 15
* in order to compensate the same change applied to cos_table_fixed_8
*/
#define SBC_PROTO_FIXED8_SCALE \
((sizeof(FIXED_T) * CHAR_BIT - 1) - SBC_FIXED_EXTRA_BITS + 2)
#define F(x) (FIXED_A) ((x * 4) * \
((FIXED_A) 1 << (sizeof(FIXED_T) * CHAR_BIT - 1)) + 0.5)
static const FIXED_T _sbc_proto_fixed8[80] = {
F(0.00000000E+00), F(1.56575398E-04),
F(3.43256425E-04), F(5.54620202E-04),
-F(8.23919506E-04), F(1.13992507E-03),
F(1.47640169E-03), F(1.78371725E-03),
F(2.01182542E-03), F(2.10371989E-03),
F(1.99454554E-03), F(1.61656283E-03),
F(9.02154502E-04), F(1.78805361E-04),
F(1.64973098E-03), F(3.49717454E-03),
F(5.65949473E-03), F(8.02941163E-03),
F(1.04584443E-02), F(1.27472335E-02),
-F(1.46525263E-02), F(1.59045603E-02),
F(1.62208471E-02), F(1.53184106E-02),
F(1.29371806E-02), F(8.85757540E-03),
F(2.92408442E-03), -F(4.91578024E-03),
-F(1.46404076E-02), F(2.61098752E-02),
F(3.90751381E-02), F(5.31873032E-02),
F(6.79989431E-02), F(8.29847578E-02),
F(9.75753918E-02), F(1.11196689E-01),
-F(1.23264548E-01), F(1.33264415E-01),
F(1.40753505E-01), F(1.45389847E-01),
F(1.46955068E-01), F(1.45389847E-01),
F(1.40753505E-01), F(1.33264415E-01),
F(1.23264548E-01), -F(1.11196689E-01),
-F(9.75753918E-02), -F(8.29847578E-02),
-F(6.79989431E-02), -F(5.31873032E-02),
-F(3.90751381E-02), -F(2.61098752E-02),
F(1.46404076E-02), -F(4.91578024E-03),
F(2.92408442E-03), F(8.85757540E-03),
F(1.29371806E-02), F(1.53184106E-02),
F(1.62208471E-02), F(1.59045603E-02),
F(1.46525263E-02), -F(1.27472335E-02),
-F(1.04584443E-02), -F(8.02941163E-03),
-F(5.65949473E-03), -F(3.49717454E-03),
-F(1.64973098E-03), -F(1.78805361E-04),
-F(9.02154502E-04), F(1.61656283E-03),
F(1.99454554E-03), F(2.10371989E-03),
F(2.01182542E-03), F(1.78371725E-03),
F(1.47640169E-03), F(1.13992507E-03),
F(8.23919506E-04), -F(5.54620202E-04),
-F(3.43256425E-04), -F(1.56575398E-04),
};
#undef F
/*
* To produce this cosine matrix in Octave:
*
* b = zeros(8, 16);
* for i = 0:7
* for j = 0:15 b(i+1, j+1) = cos((i + 0.5) * (j - 4) * (pi/8))
* endfor endfor;
* printf("%.10f, ", b');
*
* Note: in each block of 16 numbers sign was changed for elements 4, 13, 14, 15
*
* Change of sign for element 4 allows to replace constant 1.0 (not
* representable in Q15 format) with -1.0 (fine with Q15).
* Changed signs for elements 13, 14, 15 allow to have more similar constants
* and simplify subband filter function code.
*/
#define SBC_COS_TABLE_FIXED8_SCALE \
((sizeof(FIXED_T) * CHAR_BIT - 1) + SBC_FIXED_EXTRA_BITS)
#define F(x) (FIXED_A) ((x) * \
((FIXED_A) 1 << (sizeof(FIXED_T) * CHAR_BIT - 1)) + 0.5)
static const FIXED_T cos_table_fixed_8[128] = {
F(0.7071067812), F(0.8314696123), F(0.9238795325), F(0.9807852804),
-F(1.0000000000), F(0.9807852804), F(0.9238795325), F(0.8314696123),
F(0.7071067812), F(0.5555702330), F(0.3826834324), F(0.1950903220),
F(0.0000000000), F(0.1950903220), F(0.3826834324), F(0.5555702330),
-F(0.7071067812), -F(0.1950903220), F(0.3826834324), F(0.8314696123),
-F(1.0000000000), F(0.8314696123), F(0.3826834324), -F(0.1950903220),
-F(0.7071067812), -F(0.9807852804), -F(0.9238795325), -F(0.5555702330),
-F(0.0000000000), -F(0.5555702330), -F(0.9238795325), -F(0.9807852804),
-F(0.7071067812), -F(0.9807852804), -F(0.3826834324), F(0.5555702330),
-F(1.0000000000), F(0.5555702330), -F(0.3826834324), -F(0.9807852804),
-F(0.7071067812), F(0.1950903220), F(0.9238795325), F(0.8314696123),
F(0.0000000000), F(0.8314696123), F(0.9238795325), F(0.1950903220),
F(0.7071067812), -F(0.5555702330), -F(0.9238795325), F(0.1950903220),
-F(1.0000000000), F(0.1950903220), -F(0.9238795325), -F(0.5555702330),
F(0.7071067812), F(0.8314696123), -F(0.3826834324), -F(0.9807852804),
-F(0.0000000000), -F(0.9807852804), -F(0.3826834324), F(0.8314696123),
F(0.7071067812), F(0.5555702330), -F(0.9238795325), -F(0.1950903220),
-F(1.0000000000), -F(0.1950903220), -F(0.9238795325), F(0.5555702330),
F(0.7071067812), -F(0.8314696123), -F(0.3826834324), F(0.9807852804),
F(0.0000000000), F(0.9807852804), -F(0.3826834324), -F(0.8314696123),
-F(0.7071067812), F(0.9807852804), -F(0.3826834324), -F(0.5555702330),
-F(1.0000000000), -F(0.5555702330), -F(0.3826834324), F(0.9807852804),
-F(0.7071067812), -F(0.1950903220), F(0.9238795325), -F(0.8314696123),
-F(0.0000000000), -F(0.8314696123), F(0.9238795325), -F(0.1950903220),
-F(0.7071067812), F(0.1950903220), F(0.3826834324), -F(0.8314696123),
-F(1.0000000000), -F(0.8314696123), F(0.3826834324), F(0.1950903220),
-F(0.7071067812), F(0.9807852804), -F(0.9238795325), F(0.5555702330),
-F(0.0000000000), F(0.5555702330), -F(0.9238795325), F(0.9807852804),
F(0.7071067812), -F(0.8314696123), F(0.9238795325), -F(0.9807852804),
-F(1.0000000000), -F(0.9807852804), F(0.9238795325), -F(0.8314696123),
F(0.7071067812), -F(0.5555702330), F(0.3826834324), -F(0.1950903220),
-F(0.0000000000), -F(0.1950903220), F(0.3826834324), -F(0.5555702330),
};
#undef F
|
