aboutsummaryrefslogtreecommitdiffstats
path: root/code/libspeex/ltp_bfin.h
blob: b530f85986d8a96d9774ed1a0f880733a337815c (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
/* Copyright (C) 2005 Analog Devices */
/**
   @file ltp_bfin.h
   @author Jean-Marc Valin
   @brief Long-Term Prediction functions (Blackfin version)
*/
/*
   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.
*/

#define OVERRIDE_INNER_PROD
spx_word32_t inner_prod(const spx_word16_t *x, const spx_word16_t *y, int len)
{
   spx_word32_t sum=0;
   __asm__ __volatile__ (
      "P0 = %3;\n\t"
      "P1 = %1;\n\t"
      "P2 = %2;\n\t"
      "I0 = P1;\n\t"
      "I1 = P2;\n\t"
      "L0 = 0;\n\t"
      "L1 = 0;\n\t"
      "A0 = 0;\n\t"
      "R0.L = W[I0++] || R1.L = W[I1++];\n\t"
      "LOOP inner%= LC0 = P0;\n\t"
      "LOOP_BEGIN inner%=;\n\t"
         "A0 += R0.L*R1.L (IS) || R0.L = W[I0++] || R1.L = W[I1++];\n\t"
      "LOOP_END inner%=;\n\t"
      "A0 += R0.L*R1.L (IS);\n\t"
      "A0 = A0 >>> 6;\n\t"
      "R0 = A0;\n\t"
      "%0 = R0;\n\t"
   : "=m" (sum)
   : "m" (x), "m" (y), "d" (len-1)
   : "P0", "P1", "P2", "R0", "R1", "A0", "I0", "I1", "L0", "L1", "R3"
   );
   return sum;
}

#define OVERRIDE_PITCH_XCORR
void pitch_xcorr(const spx_word16_t *_x, const spx_word16_t *_y, spx_word32_t *corr, int len, int nb_pitch, char *stack)
{
   corr += nb_pitch - 1;
   __asm__ __volatile__ (
      "P2 = %0;\n\t"
      "I0 = P2;\n\t" /* x in I0 */
      "B0 = P2;\n\t" /* x in B0 */
      "R0 = %3;\n\t" /* len in R0 */
      "P3 = %3;\n\t"
      "P3 += -2;\n\t" /* len in R0 */
      "P4 = %4;\n\t" /* nb_pitch in R0 */
      "R1 = R0 << 1;\n\t" /* number of bytes in x */
      "L0 = R1;\n\t"
      "P0 = %1;\n\t"

      "P1 = %2;\n\t"
      "B1 = P1;\n\t"
      "L1 = 0;\n\t" /*Disable looping on I1*/

      "r0 = [I0++];\n\t"
      "LOOP pitch%= LC0 = P4 >> 1;\n\t"
      "LOOP_BEGIN pitch%=;\n\t"
         "I1 = P0;\n\t"
         "A1 = A0 = 0;\n\t"
         "R1 = [I1++];\n\t"
         "LOOP inner_prod%= LC1 = P3 >> 1;\n\t"
         "LOOP_BEGIN inner_prod%=;\n\t"
            "A1 += R0.L*R1.H, A0 += R0.L*R1.L (IS) || R1.L = W[I1++];\n\t"
            "A1 += R0.H*R1.L, A0 += R0.H*R1.H (IS) || R1.H = W[I1++] || R0 = [I0++];\n\t"
         "LOOP_END inner_prod%=;\n\t"
         "A1 += R0.L*R1.H, A0 += R0.L*R1.L (IS) || R1.L = W[I1++];\n\t"
         "A1 += R0.H*R1.L, A0 += R0.H*R1.H (IS) || R0 = [I0++];\n\t"
         "A0 = A0 >>> 6;\n\t"
         "A1 = A1 >>> 6;\n\t"
         "R2 = A0, R3 = A1;\n\t"
         "[P1--] = r2;\n\t"
         "[P1--] = r3;\n\t"
         "P0 += 4;\n\t"
      "LOOP_END pitch%=;\n\t"
      "L0 = 0;\n\t"
   : : "m" (_x), "m" (_y), "m" (corr), "m" (len), "m" (nb_pitch)
   : "A0", "A1", "P0", "P1", "P2", "P3", "P4", "R0", "R1", "R2", "R3", "I0", "I1", "L0", "L1", "B0", "B1", "memory"
   );
}

#define OVERRIDE_COMPUTE_PITCH_ERROR
static inline spx_word32_t compute_pitch_error(spx_word16_t *C, spx_word16_t *g, spx_word16_t pitch_control)
{
   spx_word32_t sum;
   __asm__ __volatile__
         (
         "A0 = 0;\n\t"
         
         "R0 = W[%1++];\n\t"
         "R1.L = %2.L*%5.L (IS);\n\t"
         "A0 += R1.L*R0.L (IS) || R0 = W[%1++];\n\t"
         
         "R1.L = %3.L*%5.L (IS);\n\t"
         "A0 += R1.L*R0.L (IS) || R0 = W[%1++];\n\t"
         
         "R1.L = %4.L*%5.L (IS);\n\t"
         "A0 += R1.L*R0.L (IS) || R0 = W[%1++];\n\t"
         
         "R1.L = %2.L*%3.L (IS);\n\t"
         "A0 -= R1.L*R0.L (IS) || R0 = W[%1++];\n\t"

         "R1.L = %4.L*%3.L (IS);\n\t"
         "A0 -= R1.L*R0.L (IS) || R0 = W[%1++];\n\t"
         
         "R1.L = %4.L*%2.L (IS);\n\t"
         "A0 -= R1.L*R0.L (IS) || R0 = W[%1++];\n\t"
         
         "R1.L = %2.L*%2.L (IS);\n\t"
         "A0 -= R1.L*R0.L (IS) || R0 = W[%1++];\n\t"

         "R1.L = %3.L*%3.L (IS);\n\t"
         "A0 -= R1.L*R0.L (IS) || R0 = W[%1++];\n\t"
         
         "R1.L = %4.L*%4.L (IS);\n\t"
         "A0 -= R1.L*R0.L (IS);\n\t"
         
         "%0 = A0;\n\t"
   : "=&D" (sum), "=a" (C)
   : "d" (g[0]), "d" (g[1]), "d" (g[2]), "d" (pitch_control), "1" (C)
   : "R0", "R1", "R2", "A0"
         );
   return sum;
}

#define OVERRIDE_OPEN_LOOP_NBEST_PITCH
#ifdef OVERRIDE_OPEN_LOOP_NBEST_PITCH
void open_loop_nbest_pitch(spx_word16_t *sw, int start, int end, int len, int *pitch, spx_word16_t *gain, int N, char *stack)
{
   int i,j,k;
   VARDECL(spx_word32_t *best_score);
   VARDECL(spx_word32_t *best_ener);
   spx_word32_t e0;
   VARDECL(spx_word32_t *corr);
   VARDECL(spx_word32_t *energy);

   ALLOC(best_score, N, spx_word32_t);
   ALLOC(best_ener, N, spx_word32_t);
   ALLOC(corr, end-start+1, spx_word32_t);
   ALLOC(energy, end-start+2, spx_word32_t);

   for (i=0;i<N;i++)
   {
        best_score[i]=-1;
        best_ener[i]=0;
        pitch[i]=start;
   }

   energy[0]=inner_prod(sw-start, sw-start, len);
   e0=inner_prod(sw, sw, len);

   /* energy update -------------------------------------*/

      __asm__ __volatile__
      (
"        P0 = %0;\n\t"
"        I1 = %1;\n\t"
"        L1 = 0;\n\t"
"        I2 = %2;\n\t"
"        L2 = 0;\n\t"
"        R2 = [P0++];\n\t"
"        R3 = 0;\n\t"
"        LSETUP (eu1, eu2) LC1 = %3;\n\t"
"eu1:      R1.L = W [I1--] || R0.L = W [I2--] ;\n\t"
"          R1 = R1.L * R1.L (IS);\n\t"
"          R0 = R0.L * R0.L (IS);\n\t"
"          R1 >>>= 6;\n\t"
"          R1 = R1 + R2;\n\t"
"          R0 >>>= 6;\n\t"
"          R1 = R1 - R0;\n\t"
"          R2 = MAX(R1,R3);\n\t"
"eu2:      [P0++] = R2;\n\t"
       : : "d" (energy), "d" (&sw[-start-1]), "d" (&sw[-start+len-1]),
           "a" (end-start)  
       : "P0", "I1", "I2", "R0", "R1", "R2", "R3"
#if (__GNUC__ == 4)
         , "LC1"
#endif
       );

   pitch_xcorr(sw, sw-end, corr, len, end-start+1, stack);

   /* FIXME: Fixed-point and floating-point code should be merged */
   {
      VARDECL(spx_word16_t *corr16);
      VARDECL(spx_word16_t *ener16);
      ALLOC(corr16, end-start+1, spx_word16_t);
      ALLOC(ener16, end-start+1, spx_word16_t);
      /* Normalize to 180 so we can square it and it still fits in 16 bits */
      normalize16(corr, corr16, 180, end-start+1);
      normalize16(energy, ener16, 180, end-start+1);

      if (N == 1) {
	/* optimised asm to handle N==1 case */
      __asm__ __volatile__
      (
"        I0 = %1;\n\t"                     /* I0: corr16[]    */
"        L0 = 0;\n\t"
"        I1 = %2;\n\t"                     /* I1: energy      */
"        L1 = 0;\n\t"
"        R2 = -1;\n\t"                     /* R2: best score  */
"        R3 = 0;\n\t"                      /* R3: best energy */
"        P0 = %4;\n\t"                     /* P0: best pitch  */
"        P1 = %4;\n\t"                     /* P1: counter     */
"        LSETUP (sl1, sl2) LC1 = %3;\n\t"
"sl1:      R0.L = W [I0++] || R1.L = W [I1++];\n\t"         
"          R0 = R0.L * R0.L (IS);\n\t"
"          R1   += 1;\n\t"
"          R4   = R0.L * R3.L;\n\t"
"          R5   = R2.L * R1.L;\n\t"
"          cc   = R5 < R4;\n\t"
"          if cc R2 = R0;\n\t"
"          if cc R3 = R1;\n\t"
"          if cc P0 = P1;\n\t"
"sl2:      P1 += 1;\n\t"
"        %0 = P0;\n\t"
       : "=&d" (pitch[0])
       : "a" (corr16), "a" (ener16), "a" (end+1-start), "d" (start) 
       : "P0", "P1", "I0", "I1", "R0", "R1", "R2", "R3", "R4", "R5"
#if (__GNUC__ == 4)
         , "LC1"
#endif
       );

      }
      else {
	for (i=start;i<=end;i++)
	  {
	    spx_word16_t tmp = MULT16_16_16(corr16[i-start],corr16[i-start]);
	    /* Instead of dividing the tmp by the energy, we multiply on the other side */
	    if (MULT16_16(tmp,best_ener[N-1])>MULT16_16(best_score[N-1],ADD16(1,ener16[i-start])))
	      {
		/* We can safely put it last and then check */
		best_score[N-1]=tmp;
		best_ener[N-1]=ener16[i-start]+1;
		pitch[N-1]=i;
		/* Check if it comes in front of others */
		for (j=0;j<N-1;j++)
		  {
		    if (MULT16_16(tmp,best_ener[j])>MULT16_16(best_score[j],ADD16(1,ener16[i-start])))
		      {
			for (k=N-1;k>j;k--)
			  {
			    best_score[k]=best_score[k-1];
			    best_ener[k]=best_ener[k-1];
			    pitch[k]=pitch[k-1];
			  }
			best_score[j]=tmp;
			best_ener[j]=ener16[i-start]+1;
			pitch[j]=i;
			break;
		      }
		  }
	      }
	  }
      }
   }

   /* Compute open-loop gain */
   if (gain)
   {
       for (j=0;j<N;j++)
       {
          spx_word16_t g;
          i=pitch[j];
          g = DIV32(corr[i-start], 10+SHR32(MULT16_16(spx_sqrt(e0),spx_sqrt(energy[i-start])),6));
          /* FIXME: g = max(g,corr/energy) */
                   if (g<0)
                   g = 0;
             gain[j]=g;
       }
   }
}
#endif

#define OVERRIDE_PITCH_GAIN_SEARCH_3TAP_VQ
#ifdef OVERRIDE_PITCH_GAIN_SEARCH_3TAP_VQ
static int pitch_gain_search_3tap_vq(
  const signed char *gain_cdbk,
  int                gain_cdbk_size,
  spx_word16_t      *C16,
  spx_word16_t       max_gain
)
{
  const signed char *ptr=gain_cdbk;
  int                best_cdbk=0;
  spx_word32_t       best_sum=-VERY_LARGE32;
  spx_word32_t       sum=0;
  spx_word16_t       g[3];
  spx_word16_t       pitch_control=64;
  spx_word16_t       gain_sum;
  int                i;

      /* fast asm version of VQ codebook search */

      __asm__ __volatile__
      (

"        P0 = %2;\n\t"                     /* P0: ptr to gain_cdbk */
"        L1 = 0;\n\t"                      /* no circ addr for L1  */
"        %0 = 0;\n\t"                      /* %0: best_sum         */
"        %1 = 0;\n\t"                      /* %1: best_cbdk        */
"        P1 = 0;\n\t"                      /* P1: loop counter     */

"        LSETUP (pgs1, pgs2) LC1 = %4;\n\t"
"pgs1:     R2  = B [P0++] (X);\n\t"        /* R2: g[0]             */
"          R3  = B [P0++] (X);\n\t"        /* R3: g[1]             */
"          R4  = B [P0++] (X);\n\t"        /* R4: g[2]             */
"          R2 += 32;\n\t"
"          R3 += 32;\n\t"
"          R4 += 32;\n\t"
"          R4.H = 64;\n\t"                 /* R4.H: pitch_control    */

"          R0  = B [P0++] (X);\n\t"              
"          B0  = R0;\n\t"                  /* BO: gain_sum         */
          
           /* compute_pitch_error() -------------------------------*/

"          I1 = %3;\n\t"                   /* I1: ptr to C         */
"          A0 = 0;\n\t"
         
"          R0.L = W[I1++];\n\t"
"          R1.L = R2.L*R4.H (IS);\n\t"
"          A0 += R1.L*R0.L (IS) || R0.L = W[I1++];\n\t"
         
"          R1.L = R3.L*R4.H (IS);\n\t"
"          A0 += R1.L*R0.L (IS) || R0.L = W[I1++];\n\t"
         
"          R1.L = R4.L*R4.H (IS);\n\t"
"          A0 += R1.L*R0.L (IS) || R0.L = W[I1++];\n\t"
         
"          R1.L = R2.L*R3.L (IS);\n\t"
"          A0 -= R1.L*R0.L (IS) || R0.L = W[I1++];\n\t"

"          R1.L = R4.L*R3.L (IS);\n\t"
"          A0 -= R1.L*R0.L (IS) || R0.L = W[I1++];\n\t"
         
"          R1.L = R4.L*R2.L (IS);\n\t"
"          A0 -= R1.L*R0.L (IS) || R0.L = W[I1++];\n\t"
         
"          R1.L = R2.L*R2.L (IS);\n\t"
"          A0 -= R1.L*R0.L (IS) || R0.L = W[I1++];\n\t"

"          R1.L = R3.L*R3.L (IS);\n\t"
"          A0 -= R1.L*R0.L (IS) || R0.L = W[I1++];\n\t"
         
"          R1.L = R4.L*R4.L (IS);\n\t"
"          R0 = (A0 -= R1.L*R0.L) (IS);\n\t"

/*
    Re-arrange the if-then to code efficiently on the Blackfin:

      if (sum>best_sum && gain_sum<=max_gain)   ------ (1)

      if (sum>best_sum && !(gain_sum>max_gain)) ------ (2)

      if (max_gain<=gain_sum) {                 ------ (3)
      sum = -VERY_LARGE32;
      }
      if (best_sum<=sum)

    The blackin cc instructions are all of the form:

      cc = x < y (or cc = x <= y)
*/
"          R1 = B0\n\t"
"          R2 = %5\n\t"
"          R3 = %6\n\t"
"          cc = R2 <= R1;\n\t" 
"          if cc R0 = R3;\n\t"
"          cc = %0 <= R0;\n\t"
"          if cc %0 = R0;\n\t"
"          if cc %1 = P1;\n\t"

"pgs2:     P1 += 1;\n\t"
   
       : "=&d" (best_sum), "=&d" (best_cdbk) 
       : "a" (gain_cdbk), "a" (C16), "a" (gain_cdbk_size), "a" (max_gain),
         "b" (-VERY_LARGE32)
       : "R0", "R1", "R2", "R3", "R4", "P0", 
         "P1", "I1", "L1", "A0", "B0"
#if (__GNUC__ == 4)
         , "LC1"
#endif
       );

  return best_cdbk;
}
#endif