summaryrefslogtreecommitdiffstats
path: root/apps/codecs/libspeex/quant_lsp.c
blob: 9a6afa2ca06e79cce94a536972f278f13a7e0bd6 (plain)
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
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
/* Copyright (C) 2002 Jean-Marc Valin 
   File: quant_lsp.c
   LSP vector quantization

   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions
   are met:
   
   - Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
   
   - Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.
   
   - Neither the name of the Xiph.org Foundation nor the names of its
   contributors may be used to endorse or promote products derived from
   this software without specific prior written permission.
   
   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#ifdef HAVE_CONFIG_H
#include "config-speex.h"
#endif

#include "quant_lsp.h"
#include "os_support.h"
#include <math.h>
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif

#include "misc.h"

#ifdef BFIN_ASM
#include "quant_lsp_bfin.h"
#endif

#ifdef FIXED_POINT

#define LSP_LINEAR(i) (SHL16(i+1,11))
#define LSP_LINEAR_HIGH(i) (ADD16(MULT16_16_16(i,2560),6144))
#define LSP_DIV_256(x) (SHL16((spx_word16_t)x, 5))
#define LSP_DIV_512(x) (SHL16((spx_word16_t)x, 4))
#define LSP_DIV_1024(x) (SHL16((spx_word16_t)x, 3))
#define LSP_PI 25736

#else

#define LSP_LINEAR(i) (.25*(i)+.25)
#define LSP_LINEAR_HIGH(i) (.3125*(i)+.75)
#define LSP_SCALE 256.
#define LSP_DIV_256(x) (0.0039062*(x))
#define LSP_DIV_512(x) (0.0019531*(x))
#define LSP_DIV_1024(x) (0.00097656*(x))
#define LSP_PI M_PI

#endif

static void compute_quant_weights(spx_lsp_t *qlsp, spx_word16_t *quant_weight, int order)
{
   int i;
   spx_word16_t tmp1, tmp2;
   for (i=0;i<order;i++)
   {
      if (i==0)
         tmp1 = qlsp[i];
      else
         tmp1 = qlsp[i]-qlsp[i-1];
      if (i==order-1)
         tmp2 = LSP_PI-qlsp[i];
      else
         tmp2 = qlsp[i+1]-qlsp[i];
      if (tmp2<tmp1)
         tmp1 = tmp2;
#ifdef FIXED_POINT
      quant_weight[i] = DIV32_16(81920,ADD16(300,tmp1));
#else
      quant_weight[i] = 10/(.04+tmp1);
#endif
   }

}

/* Note: x is modified*/
#ifndef OVERRIDE_LSP_QUANT
static int lsp_quant(spx_word16_t *x, const signed char *cdbk, int nbVec, int nbDim)
{
   int i,j;
   spx_word32_t dist;
   spx_word16_t tmp;
   spx_word32_t best_dist=VERY_LARGE32;
   int best_id=0;
   const signed char *ptr=cdbk;
   for (i=0;i<nbVec;i++)
   {
      dist=0;
      for (j=0;j<nbDim;j++)
      {
         tmp=SUB16(x[j],SHL16((spx_word16_t)*ptr++,5));
         dist=MAC16_16(dist,tmp,tmp);
      } 
      if (dist<best_dist)
      {
         best_dist=dist;
         best_id=i;
      }
   }

   for (j=0;j<nbDim;j++)
      x[j] = SUB16(x[j],SHL16((spx_word16_t)cdbk[best_id*nbDim+j],5));
    
   return best_id;
}
#endif

/* Note: x is modified*/
#ifndef OVERRIDE_LSP_WEIGHT_QUANT
static int lsp_weight_quant(spx_word16_t *x, spx_word16_t *weight, const signed char *cdbk, int nbVec, int nbDim)
{
   int i,j;
   spx_word32_t dist;
   spx_word16_t tmp;
   spx_word32_t best_dist=VERY_LARGE32;
   int best_id=0;
   const signed char *ptr=cdbk;
   for (i=0;i<nbVec;i++)
   {
      dist=0;
      for (j=0;j<nbDim;j++)
      {
         tmp=SUB16(x[j],SHL16((spx_word16_t)*ptr++,5));
         dist=MAC16_32_Q15(dist,weight[j],MULT16_16(tmp,tmp));
      }
      if (dist<best_dist)
      {
         best_dist=dist;
         best_id=i;
      }
   }
   
   for (j=0;j<nbDim;j++)
      x[j] = SUB16(x[j],SHL16((spx_word16_t)cdbk[best_id*nbDim+j],5));
   return best_id;
}
#endif

void lsp_quant_nb(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits)
{
   int i;
   int id;
   spx_word16_t quant_weight[10];
   
   for (i=0;i<order;i++)
      qlsp[i]=lsp[i];

   compute_quant_weights(qlsp, quant_weight, order);

   for (i=0;i<order;i++)
      qlsp[i]=SUB16(qlsp[i],LSP_LINEAR(i));

#ifndef FIXED_POINT
   for (i=0;i<order;i++)
      qlsp[i] = LSP_SCALE*qlsp[i];
#endif
   id = lsp_quant(qlsp, cdbk_nb, NB_CDBK_SIZE, order);
   speex_bits_pack(bits, id, 6);

   for (i=0;i<order;i++)
      qlsp[i]*=2;
 
   id = lsp_weight_quant(qlsp, quant_weight, cdbk_nb_low1, NB_CDBK_SIZE_LOW1, 5);
   speex_bits_pack(bits, id, 6);

   for (i=0;i<5;i++)
      qlsp[i]*=2;

   id = lsp_weight_quant(qlsp, quant_weight, cdbk_nb_low2, NB_CDBK_SIZE_LOW2, 5);
   speex_bits_pack(bits, id, 6);

   id = lsp_weight_quant(qlsp+5, quant_weight+5, cdbk_nb_high1, NB_CDBK_SIZE_HIGH1, 5);
   speex_bits_pack(bits, id, 6);

   for (i=5;i<10;i++)
      qlsp[i]*=2;

   id = lsp_weight_quant(qlsp+5, quant_weight+5, cdbk_nb_high2, NB_CDBK_SIZE_HIGH2, 5);
   speex_bits_pack(bits, id, 6);

#ifdef FIXED_POINT
   for (i=0;i<order;i++)
      qlsp[i]=PSHR16(qlsp[i],2);
#else
   for (i=0;i<order;i++)
      qlsp[i]=qlsp[i] * .00097656;
#endif

   for (i=0;i<order;i++)
      qlsp[i]=lsp[i]-qlsp[i];
}

void lsp_unquant_nb(spx_lsp_t *lsp, int order, SpeexBits *bits)
{
   int i, id;
   for (i=0;i<order;i++)
      lsp[i]=LSP_LINEAR(i);


   id=speex_bits_unpack_unsigned(bits, 6);
   for (i=0;i<10;i++)
      lsp[i] = ADD32(lsp[i], LSP_DIV_256(cdbk_nb[id*10+i]));

   id=speex_bits_unpack_unsigned(bits, 6);
   for (i=0;i<5;i++)
      lsp[i] = ADD16(lsp[i], LSP_DIV_512(cdbk_nb_low1[id*5+i]));

   id=speex_bits_unpack_unsigned(bits, 6);
   for (i=0;i<5;i++)
      lsp[i] = ADD32(lsp[i], LSP_DIV_1024(cdbk_nb_low2[id*5+i]));

   id=speex_bits_unpack_unsigned(bits, 6);
   for (i=0;i<5;i++)
      lsp[i+5] = ADD32(lsp[i+5], LSP_DIV_512(cdbk_nb_high1[id*5+i]));
   
   id=speex_bits_unpack_unsigned(bits, 6);
   for (i=0;i<5;i++)
      lsp[i+5] = ADD32(lsp[i+5], LSP_DIV_1024(cdbk_nb_high2[id*5+i]));
}


void lsp_quant_lbr(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits)
{
   int i;
   int id;
   spx_word16_t quant_weight[10];

   for (i=0;i<order;i++)
      qlsp[i]=lsp[i];

   compute_quant_weights(qlsp, quant_weight, order);

   for (i=0;i<order;i++)
      qlsp[i]=SUB16(qlsp[i],LSP_LINEAR(i));
#ifndef FIXED_POINT
   for (i=0;i<order;i++)
      qlsp[i]=qlsp[i]*LSP_SCALE;
#endif
   id = lsp_quant(qlsp, cdbk_nb, NB_CDBK_SIZE, order);
   speex_bits_pack(bits, id, 6);
   
   for (i=0;i<order;i++)
      qlsp[i]*=2;
   
   id = lsp_weight_quant(qlsp, quant_weight, cdbk_nb_low1, NB_CDBK_SIZE_LOW1, 5);
   speex_bits_pack(bits, id, 6);

   id = lsp_weight_quant(qlsp+5, quant_weight+5, cdbk_nb_high1, NB_CDBK_SIZE_HIGH1, 5);
   speex_bits_pack(bits, id, 6);

#ifdef FIXED_POINT
   for (i=0;i<order;i++)
      qlsp[i] = PSHR16(qlsp[i],1);
#else
   for (i=0;i<order;i++)
      qlsp[i] = qlsp[i]*0.0019531;
#endif

   for (i=0;i<order;i++)
      qlsp[i]=lsp[i]-qlsp[i];
}

void lsp_unquant_lbr(spx_lsp_t *lsp, int order, SpeexBits *bits)
{
   int i, id;
   for (i=0;i<order;i++)
      lsp[i]=LSP_LINEAR(i);


   id=speex_bits_unpack_unsigned(bits, 6);
   for (i=0;i<10;i++)
      lsp[i] += LSP_DIV_256(cdbk_nb[id*10+i]);

   id=speex_bits_unpack_unsigned(bits, 6);
   for (i=0;i<5;i++)
      lsp[i] += LSP_DIV_512(cdbk_nb_low1[id*5+i]);

   id=speex_bits_unpack_unsigned(bits, 6);
   for (i=0;i<5;i++)
      lsp[i+5] += LSP_DIV_512(cdbk_nb_high1[id*5+i]);
   
}


#ifdef DISABLE_WIDEBAND
void lsp_quant_high(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits)
{
   speex_fatal("Wideband and Ultra-wideband are disabled");
}
void lsp_unquant_high(spx_lsp_t *lsp, int order, SpeexBits *bits)
{
   speex_fatal("Wideband and Ultra-wideband are disabled");
}
#else
extern const signed char high_lsp_cdbk[];
extern const signed char high_lsp_cdbk2[];


void lsp_quant_high(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits)
{
   int i;
   int id;
   spx_word16_t quant_weight[10];

   for (i=0;i<order;i++)
      qlsp[i]=lsp[i];

   compute_quant_weights(qlsp, quant_weight, order);

   /*   quant_weight[0] = 10/(qlsp[1]-qlsp[0]);
   quant_weight[order-1] = 10/(qlsp[order-1]-qlsp[order-2]);
   for (i=1;i<order-1;i++)
   {
      tmp1 = 10/(qlsp[i]-qlsp[i-1]);
      tmp2 = 10/(qlsp[i+1]-qlsp[i]);
      quant_weight[i] = tmp1 > tmp2 ? tmp1 : tmp2;
      }*/

   for (i=0;i<order;i++)
      qlsp[i]=SUB16(qlsp[i],LSP_LINEAR_HIGH(i));
#ifndef FIXED_POINT
   for (i=0;i<order;i++)
      qlsp[i] = qlsp[i]*LSP_SCALE;
#endif
   id = lsp_quant(qlsp, high_lsp_cdbk, 64, order);
   speex_bits_pack(bits, id, 6);

   for (i=0;i<order;i++)
      qlsp[i]*=2;

   id = lsp_weight_quant(qlsp, quant_weight, high_lsp_cdbk2, 64, order);
   speex_bits_pack(bits, id, 6);

#ifdef FIXED_POINT
   for (i=0;i<order;i++)
      qlsp[i] = PSHR16(qlsp[i],1);
#else
   for (i=0;i<order;i++)
      qlsp[i] = qlsp[i]*0.0019531;
#endif

   for (i=0;i<order;i++)
      qlsp[i]=lsp[i]-qlsp[i];
}

void lsp_unquant_high(spx_lsp_t *lsp, int order, SpeexBits *bits)
{

   int i, id;
   for (i=0;i<order;i++)
      lsp[i]=LSP_LINEAR_HIGH(i);


   id=speex_bits_unpack_unsigned(bits, 6);
   for (i=0;i<order;i++)
      lsp[i] += LSP_DIV_256(high_lsp_cdbk[id*order+i]);


   id=speex_bits_unpack_unsigned(bits, 6);
   for (i=0;i<order;i++)
      lsp[i] += LSP_DIV_512(high_lsp_cdbk2[id*order+i]);
}

#endif


#ifdef EPIC_48K

extern const signed char cdbk_lsp_vlbr[5120];
extern const signed char cdbk_lsp2_vlbr[160];

void lsp_quant_48k(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits)
{
   int i;
   int id;
   spx_word16_t quant_weight[10];

   for (i=0;i<order;i++)
      qlsp[i]=lsp[i];

   compute_quant_weights(qlsp, quant_weight, order);

   for (i=0;i<order;i++)
      qlsp[i]=SUB16(qlsp[i],LSP_SCALING*(.25*i+.3125));
#ifndef FIXED_POINT
   for (i=0;i<order;i++)
      qlsp[i] = qlsp[i]*LSP_SCALE;
#endif
   
   id = lsp_quant(qlsp, cdbk_lsp_vlbr, 512, order);
   speex_bits_pack(bits, id, 9);

   for (i=0;i<order;i++)
      qlsp[i]*=4;
   
   id = lsp_weight_quant(qlsp, quant_weight, cdbk_lsp2_vlbr, 16, 10);
   speex_bits_pack(bits, id, 4);

#ifdef FIXED_POINT
   for (i=0;i<order;i++)
      qlsp[i]=PSHR16(qlsp[i],2);
#else
   for (i=0;i<order;i++)
      qlsp[i]=qlsp[i]*0.00097655;
#endif

   for (i=0;i<order;i++)
      qlsp[i]=lsp[i]-qlsp[i];
}

void lsp_unquant_48k(spx_lsp_t *lsp, int order, SpeexBits *bits)
{
   int i, id;
   for (i=0;i<order;i++)
      lsp[i]=LSP_SCALING*(.25*i+.3125);


   id=speex_bits_unpack_unsigned(bits, 9);
   for (i=0;i<10;i++)
      lsp[i] += LSP_SCALING*0.0039062*cdbk_lsp_vlbr[id*10+i];

   id=speex_bits_unpack_unsigned(bits, 4);
   for (i=0;i<10;i++)
      lsp[i] += LSP_SCALING*0.00097655*cdbk_lsp2_vlbr[id*10+i];
   
}

#endif