summaryrefslogtreecommitdiffstats
path: root/lib/rbcodec/codecs/libopus/celt/celt.c
blob: 9ce234695ce0d314279022861df15caba5190d83 (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
/* Copyright (c) 2007-2008 CSIRO
   Copyright (c) 2007-2010 Xiph.Org Foundation
   Copyright (c) 2008 Gregory Maxwell
   Written by Jean-Marc Valin and Gregory Maxwell */
/*
   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.

   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 COPYRIGHT OWNER
   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.h"
#endif

#define CELT_C

#include "os_support.h"
#include "mdct.h"
#include <math.h>
#include "celt.h"
#include "pitch.h"
#include "bands.h"
#include "modes.h"
#include "entcode.h"
#include "quant_bands.h"
#include "rate.h"
#include "stack_alloc.h"
#include "mathops.h"
#include "float_cast.h"
#include <stdarg.h>
#include "celt_lpc.h"
#include "vq.h"

#ifndef PACKAGE_VERSION
#define PACKAGE_VERSION "unknown"
#endif

#if defined(MIPSr1_ASM)
#include "mips/celt_mipsr1.h"
#endif


int resampling_factor(opus_int32 rate)
{
   int ret;
   switch (rate)
   {
   case 48000:
      ret = 1;
      break;
   case 24000:
      ret = 2;
      break;
   case 16000:
      ret = 3;
      break;
   case 12000:
      ret = 4;
      break;
   case 8000:
      ret = 6;
      break;
   default:
#ifndef CUSTOM_MODES
      celt_assert(0);
#endif
      ret = 0;
      break;
   }
   return ret;
}

#if !defined(OVERRIDE_COMB_FILTER_CONST) || defined(NON_STATIC_COMB_FILTER_CONST_C)
/* This version should be faster on ARM */
#ifdef OPUS_ARM_ASM
#ifndef NON_STATIC_COMB_FILTER_CONST_C
static
#endif
void comb_filter_const_c(opus_val32 *y, opus_val32 *x, int T, int N,
      opus_val16 g10, opus_val16 g11, opus_val16 g12)
{
   opus_val32 x0, x1, x2, x3, x4;
   int i;
   x4 = SHL32(x[-T-2], 1);
   x3 = SHL32(x[-T-1], 1);
   x2 = SHL32(x[-T], 1);
   x1 = SHL32(x[-T+1], 1);
   for (i=0;i<N-4;i+=5)
   {
      opus_val32 t;
      x0=SHL32(x[i-T+2],1);
      t = MAC16_32_Q16(x[i], g10, x2);
      t = MAC16_32_Q16(t, g11, ADD32(x1,x3));
      t = MAC16_32_Q16(t, g12, ADD32(x0,x4));
      t = SATURATE(t, SIG_SAT);
      y[i] = t;
      x4=SHL32(x[i-T+3],1);
      t = MAC16_32_Q16(x[i+1], g10, x1);
      t = MAC16_32_Q16(t, g11, ADD32(x0,x2));
      t = MAC16_32_Q16(t, g12, ADD32(x4,x3));
      t = SATURATE(t, SIG_SAT);
      y[i+1] = t;
      x3=SHL32(x[i-T+4],1);
      t = MAC16_32_Q16(x[i+2], g10, x0);
      t = MAC16_32_Q16(t, g11, ADD32(x4,x1));
      t = MAC16_32_Q16(t, g12, ADD32(x3,x2));
      t = SATURATE(t, SIG_SAT);
      y[i+2] = t;
      x2=SHL32(x[i-T+5],1);
      t = MAC16_32_Q16(x[i+3], g10, x4);
      t = MAC16_32_Q16(t, g11, ADD32(x3,x0));
      t = MAC16_32_Q16(t, g12, ADD32(x2,x1));
      t = SATURATE(t, SIG_SAT);
      y[i+3] = t;
      x1=SHL32(x[i-T+6],1);
      t = MAC16_32_Q16(x[i+4], g10, x3);
      t = MAC16_32_Q16(t, g11, ADD32(x2,x4));
      t = MAC16_32_Q16(t, g12, ADD32(x1,x0));
      t = SATURATE(t, SIG_SAT);
      y[i+4] = t;
   }
#ifdef CUSTOM_MODES
   for (;i<N;i++)
   {
      opus_val32 t;
      x0=SHL32(x[i-T+2],1);
      t = MAC16_32_Q16(x[i], g10, x2);
      t = MAC16_32_Q16(t, g11, ADD32(x1,x3));
      t = MAC16_32_Q16(t, g12, ADD32(x0,x4));
      t = SATURATE(t, SIG_SAT);
      y[i] = t;
      x4=x3;
      x3=x2;
      x2=x1;
      x1=x0;
   }
#endif
}
#else
#ifndef NON_STATIC_COMB_FILTER_CONST_C
static
#endif
void comb_filter_const_c(opus_val32 *y, opus_val32 *x, int T, int N,
      opus_val16 g10, opus_val16 g11, opus_val16 g12)
{
   opus_val32 x0, x1, x2, x3, x4;
   int i;
   x4 = x[-T-2];
   x3 = x[-T-1];
   x2 = x[-T];
   x1 = x[-T+1];
   for (i=0;i<N;i++)
   {
      x0=x[i-T+2];
      y[i] = x[i]
               + MULT16_32_Q15(g10,x2)
               + MULT16_32_Q15(g11,ADD32(x1,x3))
               + MULT16_32_Q15(g12,ADD32(x0,x4));
      y[i] = SATURATE(y[i], SIG_SAT);
      x4=x3;
      x3=x2;
      x2=x1;
      x1=x0;
   }

}
#endif
#endif

#ifndef OVERRIDE_comb_filter
void comb_filter(opus_val32 *y, opus_val32 *x, int T0, int T1, int N,
      opus_val16 g0, opus_val16 g1, int tapset0, int tapset1,
      const opus_val16 *window, int overlap, int arch)
{
   int i;
   /* printf ("%d %d %f %f\n", T0, T1, g0, g1); */
   opus_val16 g00, g01, g02, g10, g11, g12;
   opus_val32 x0, x1, x2, x3, x4;
   static const opus_val16 gains[3][3] = {
         {QCONST16(0.3066406250f, 15), QCONST16(0.2170410156f, 15), QCONST16(0.1296386719f, 15)},
         {QCONST16(0.4638671875f, 15), QCONST16(0.2680664062f, 15), QCONST16(0.f, 15)},
         {QCONST16(0.7998046875f, 15), QCONST16(0.1000976562f, 15), QCONST16(0.f, 15)}};

   if (g0==0 && g1==0)
   {
      /* OPT: Happens to work without the OPUS_MOVE(), but only because the current encoder already copies x to y */
      if (x!=y)
         OPUS_MOVE(y, x, N);
      return;
   }
   /* When the gain is zero, T0 and/or T1 is set to zero. We need
      to have then be at least 2 to avoid processing garbage data. */
   T0 = IMAX(T0, COMBFILTER_MINPERIOD);
   T1 = IMAX(T1, COMBFILTER_MINPERIOD);
   g00 = MULT16_16_P15(g0, gains[tapset0][0]);
   g01 = MULT16_16_P15(g0, gains[tapset0][1]);
   g02 = MULT16_16_P15(g0, gains[tapset0][2]);
   g10 = MULT16_16_P15(g1, gains[tapset1][0]);
   g11 = MULT16_16_P15(g1, gains[tapset1][1]);
   g12 = MULT16_16_P15(g1, gains[tapset1][2]);
   x1 = x[-T1+1];
   x2 = x[-T1  ];
   x3 = x[-T1-1];
   x4 = x[-T1-2];
   /* If the filter didn't change, we don't need the overlap */
   if (g0==g1 && T0==T1 && tapset0==tapset1)
      overlap=0;
   for (i=0;i<overlap;i++)
   {
      opus_val16 f;
      x0=x[i-T1+2];
      f = MULT16_16_Q15(window[i],window[i]);
      y[i] = x[i]
               + MULT16_32_Q15(MULT16_16_Q15((Q15ONE-f),g00),x[i-T0])
               + MULT16_32_Q15(MULT16_16_Q15((Q15ONE-f),g01),ADD32(x[i-T0+1],x[i-T0-1]))
               + MULT16_32_Q15(MULT16_16_Q15((Q15ONE-f),g02),ADD32(x[i-T0+2],x[i-T0-2]))
               + MULT16_32_Q15(MULT16_16_Q15(f,g10),x2)
               + MULT16_32_Q15(MULT16_16_Q15(f,g11),ADD32(x1,x3))
               + MULT16_32_Q15(MULT16_16_Q15(f,g12),ADD32(x0,x4));
      y[i] = SATURATE(y[i], SIG_SAT);
      x4=x3;
      x3=x2;
      x2=x1;
      x1=x0;

   }
   if (g1==0)
   {
      /* OPT: Happens to work without the OPUS_MOVE(), but only because the current encoder already copies x to y */
      if (x!=y)
         OPUS_MOVE(y+overlap, x+overlap, N-overlap);
      return;
   }

   /* Compute the part with the constant filter. */
   comb_filter_const(y+i, x+i, T1, N-i, g10, g11, g12, arch);
}
#endif /* OVERRIDE_comb_filter */

/* TF change table. Positive values mean better frequency resolution (longer
   effective window), whereas negative values mean better time resolution
   (shorter effective window). The second index is computed as:
   4*isTransient + 2*tf_select + per_band_flag */
const signed char tf_select_table[4][8] = {
    /*isTransient=0     isTransient=1 */
      {0, -1, 0, -1,    0,-1, 0,-1}, /* 2.5 ms */
      {0, -1, 0, -2,    1, 0, 1,-1}, /* 5 ms */
      {0, -2, 0, -3,    2, 0, 1,-1}, /* 10 ms */
      {0, -2, 0, -3,    3, 0, 1,-1}, /* 20 ms */
};


void init_caps(const CELTMode *m,int *cap,int LM,int C)
{
   int i;
   for (i=0;i<m->nbEBands;i++)
   {
      int N;
      N=(m->eBands[i+1]-m->eBands[i])<<LM;
      cap[i] = (m->cache.caps[m->nbEBands*(2*LM+C-1)+i]+64)*C*N>>2;
   }
}



const char *opus_strerror(int error)
{
   static const char * const error_strings[8] = {
      "success",
      "invalid argument",
      "buffer too small",
      "internal error",
      "corrupted stream",
      "request not implemented",
      "invalid state",
      "memory allocation failed"
   };
   if (error > 0 || error < -7)
      return "unknown error";
   else
      return error_strings[-error];
}

const char *opus_get_version_string(void)
{
    return "libopus " PACKAGE_VERSION
    /* Applications may rely on the presence of this substring in the version
       string to determine if they have a fixed-point or floating-point build
       at runtime. */
#ifdef FIXED_POINT
          "-fixed"
#endif
#ifdef FUZZING
          "-fuzzing"
#endif
          ;
}