FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/opus_pvq.c
Date: 2021-09-16 08:47:15
Exec Total Coverage
Lines: 398 497 80.1%
Branches: 262 346 75.7%

Line Branch Exec Source
1 /*
2 * Copyright (c) 2007-2008 CSIRO
3 * Copyright (c) 2007-2009 Xiph.Org Foundation
4 * Copyright (c) 2008-2009 Gregory Maxwell
5 * Copyright (c) 2012 Andrew D'Addesio
6 * Copyright (c) 2013-2014 Mozilla Corporation
7 * Copyright (c) 2017 Rostislav Pehlivanov <atomnuker@gmail.com>
8 *
9 * This file is part of FFmpeg.
10 *
11 * FFmpeg is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU Lesser General Public
13 * License as published by the Free Software Foundation; either
14 * version 2.1 of the License, or (at your option) any later version.
15 *
16 * FFmpeg is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * Lesser General Public License for more details.
20 *
21 * You should have received a copy of the GNU Lesser General Public
22 * License along with FFmpeg; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 */
25
26 #include "opustab.h"
27 #include "opus_pvq.h"
28
29 #define CELT_PVQ_U(n, k) (ff_celt_pvq_u_row[FFMIN(n, k)][FFMAX(n, k)])
30 #define CELT_PVQ_V(n, k) (CELT_PVQ_U(n, k) + CELT_PVQ_U(n, (k) + 1))
31
32 1037770 static inline int16_t celt_cos(int16_t x)
33 {
34 1037770 x = (MUL16(x, x) + 4096) >> 13;
35 1037770 x = (32767-x) + ROUND_MUL16(x, (-7651 + ROUND_MUL16(x, (8277 + ROUND_MUL16(-626, x)))));
36 1037770 return x + 1;
37 }
38
39 518885 static inline int celt_log2tan(int isin, int icos)
40 {
41 int lc, ls;
42 518885 lc = opus_ilog(icos);
43 518885 ls = opus_ilog(isin);
44 518885 icos <<= 15 - lc;
45 518885 isin <<= 15 - ls;
46 518885 return (ls << 11) - (lc << 11) +
47 1037770 ROUND_MUL16(isin, ROUND_MUL16(isin, -2597) + 7932) -
48 518885 ROUND_MUL16(icos, ROUND_MUL16(icos, -2597) + 7932);
49 }
50
51 1006497 static inline int celt_bits2pulses(const uint8_t *cache, int bits)
52 {
53 // TODO: Find the size of cache and make it into an array in the parameters list
54 1006497 int i, low = 0, high;
55
56 1006497 high = cache[0];
57 1006497 bits--;
58
59
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7045479 for (i = 0; i < 6; i++) {
60 6038982 int center = (low + high + 1) >> 1;
61
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6038982 if (cache[center] >= bits)
62 3419805 high = center;
63 else
64 2619177 low = center;
65 }
66
67
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1006497 return (bits - (low == 0 ? -1 : cache[low]) <= cache[high] - bits) ? low : high;
68 }
69
70 1018229 static inline int celt_pulses2bits(const uint8_t *cache, int pulses)
71 {
72 // TODO: Find the size of cache and make it into an array in the parameters list
73
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1018229 return (pulses == 0) ? 0 : cache[pulses] + 1;
74 }
75
76 867942 static inline void celt_normalize_residual(const int * av_restrict iy, float * av_restrict X,
77 int N, float g)
78 {
79 int i;
80
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8206304 for (i = 0; i < N; i++)
81 7338362 X[i] = g * iy[i];
82 867942 }
83
84 374943 static void celt_exp_rotation_impl(float *X, uint32_t len, uint32_t stride,
85 float c, float s)
86 {
87 float *Xptr;
88 int i;
89
90 374943 Xptr = X;
91
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5428487 for (i = 0; i < len - stride; i++) {
92 5053544 float x1 = Xptr[0];
93 5053544 float x2 = Xptr[stride];
94 5053544 Xptr[stride] = c * x2 + s * x1;
95 5053544 *Xptr++ = c * x1 - s * x2;
96 }
97
98 374943 Xptr = &X[len - 2 * stride - 1];
99
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4586497 for (i = len - 2 * stride - 1; i >= 0; i--) {
100 4211554 float x1 = Xptr[0];
101 4211554 float x2 = Xptr[stride];
102 4211554 Xptr[stride] = c * x2 + s * x1;
103 4211554 *Xptr-- = c * x1 - s * x2;
104 }
105 374943 }
106
107 867942 static inline void celt_exp_rotation(float *X, uint32_t len,
108 uint32_t stride, uint32_t K,
109 enum CeltSpread spread, const int encode)
110 {
111 867942 uint32_t stride2 = 0;
112 float c, s;
113 float gain, theta;
114 int i;
115
116
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867942 if (2*K >= len || spread == CELT_SPREAD_NONE)
117 704445 return;
118
119 163497 gain = (float)len / (len + (20 - 5*spread) * K);
120 163497 theta = M_PI * gain * gain / 4;
121
122 163497 c = cosf(theta);
123 163497 s = sinf(theta);
124
125
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163497 if (len >= stride << 3) {
126 138987 stride2 = 1;
127 /* This is just a simple (equivalent) way of computing sqrt(len/stride) with rounding.
128 It's basically incrementing long as (stride2+0.5)^2 < len/stride. */
129
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590425 while ((stride2 * stride2 + stride2) * stride + (stride >> 2) < len)
130 451438 stride2++;
131 }
132
133 163497 len /= stride;
134
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384644 for (i = 0; i < stride; i++) {
135
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221147 if (encode) {
136 celt_exp_rotation_impl(X + i * len, len, 1, c, -s);
137 if (stride2)
138 celt_exp_rotation_impl(X + i * len, len, stride2, s, -c);
139 } else {
140
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221147 if (stride2)
141 153796 celt_exp_rotation_impl(X + i * len, len, stride2, s, c);
142 221147 celt_exp_rotation_impl(X + i * len, len, 1, c, s);
143 }
144 }
145 }
146
147 867942 static inline uint32_t celt_extract_collapse_mask(const int *iy, uint32_t N, uint32_t B)
148 {
149 867942 int i, j, N0 = N / B;
150 867942 uint32_t collapse_mask = 0;
151
152
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867942 if (B <= 1)
153 741536 return 1;
154
155
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533430 for (i = 0; i < B; i++)
156
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1520152 for (j = 0; j < N0; j++)
157 1113128 collapse_mask |= (!!iy[i*N0+j]) << i;
158 126406 return collapse_mask;
159 }
160
161 186191 static inline void celt_stereo_merge(float *X, float *Y, float mid, int N)
162 {
163 int i;
164 186191 float xp = 0, side = 0;
165 float E[2];
166 float mid2;
167 float gain[2];
168
169 /* Compute the norm of X+Y and X-Y as |X|^2 + |Y|^2 +/- sum(xy) */
170
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4471947 for (i = 0; i < N; i++) {
171 4285756 xp += X[i] * Y[i];
172 4285756 side += Y[i] * Y[i];
173 }
174
175 /* Compensating for the mid normalization */
176 186191 xp *= mid;
177 186191 mid2 = mid;
178 186191 E[0] = mid2 * mid2 + side - 2 * xp;
179 186191 E[1] = mid2 * mid2 + side + 2 * xp;
180
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186191 if (E[0] < 6e-4f || E[1] < 6e-4f) {
181
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1154 for (i = 0; i < N; i++)
182 998 Y[i] = X[i];
183 156 return;
184 }
185
186 186035 gain[0] = 1.0f / sqrtf(E[0]);
187 186035 gain[1] = 1.0f / sqrtf(E[1]);
188
189
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4470793 for (i = 0; i < N; i++) {
190 float value[2];
191 /* Apply mid scaling (side is already scaled) */
192 4284758 value[0] = mid * X[i];
193 4284758 value[1] = Y[i];
194 4284758 X[i] = gain[0] * (value[0] - value[1]);
195 4284758 Y[i] = gain[1] * (value[0] + value[1]);
196 }
197 }
198
199 140127 static void celt_interleave_hadamard(float *tmp, float *X, int N0,
200 int stride, int hadamard)
201 {
202 140127 int i, j, N = N0*stride;
203
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140127 const uint8_t *order = &ff_celt_hadamard_order[hadamard ? stride - 2 : 30];
204
205
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884745 for (i = 0; i < stride; i++)
206
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4394906 for (j = 0; j < N0; j++)
207 3650288 tmp[j*stride+i] = X[order[i]*N0+j];
208
209 140127 memcpy(X, tmp, N*sizeof(float));
210 140127 }
211
212 90824 static void celt_deinterleave_hadamard(float *tmp, float *X, int N0,
213 int stride, int hadamard)
214 {
215 90824 int i, j, N = N0*stride;
216
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90824 const uint8_t *order = &ff_celt_hadamard_order[hadamard ? stride - 2 : 30];
217
218
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219
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2742746 for (j = 0; j < N0; j++)
220 2277490 tmp[order[i]*N0+j] = X[j*stride+i];
221
222 90824 memcpy(X, tmp, N*sizeof(float));
223 90824 }
224
225 356919 static void celt_haar1(float *X, int N0, int stride)
226 {
227 int i, j;
228 356919 N0 >>= 1;
229
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1032538 for (i = 0; i < stride; i++) {
230
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5805723 for (j = 0; j < N0; j++) {
231 5130104 float x0 = X[stride * (2 * j + 0) + i];
232 5130104 float x1 = X[stride * (2 * j + 1) + i];
233 5130104 X[stride * (2 * j + 0) + i] = (x0 + x1) * M_SQRT1_2;
234 5130104 X[stride * (2 * j + 1) + i] = (x0 - x1) * M_SQRT1_2;
235 }
236 }
237 356919 }
238
239 575131 static inline int celt_compute_qn(int N, int b, int offset, int pulse_cap,
240 int stereo)
241 {
242 int qn, qb;
243 575131 int N2 = 2 * N - 1;
244
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575131 if (stereo && N == 2)
245 48661 N2--;
246
247 /* The upper limit ensures that in a stereo split with itheta==16384, we'll
248 * always have enough bits left over to code at least one pulse in the
249 * side; otherwise it would collapse, since it doesn't get folded. */
250 575131 qb = FFMIN3(b - pulse_cap - (4 << 3), (b + N2 * offset) / N2, 8 << 3);
251
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575131 qn = (qb < (1 << 3 >> 1)) ? 1 : ((ff_celt_qn_exp2[qb & 0x7] >> (14 - (qb >> 3))) + 1) >> 1 << 1;
252 575131 return qn;
253 }
254
255 /* Convert the quantized vector to an index */
256 static inline uint32_t celt_icwrsi(uint32_t N, uint32_t K, const int *y)
257 {
258 int i, idx = 0, sum = 0;
259 for (i = N - 1; i >= 0; i--) {
260 const uint32_t i_s = CELT_PVQ_U(N - i, sum + FFABS(y[i]) + 1);
261 idx += CELT_PVQ_U(N - i, sum) + (y[i] < 0)*i_s;
262 sum += FFABS(y[i]);
263 }
264 return idx;
265 }
266
267 // this code was adapted from libopus
268 867942 static inline uint64_t celt_cwrsi(uint32_t N, uint32_t K, uint32_t i, int *y)
269 {
270 867942 uint64_t norm = 0;
271 uint32_t q, p;
272 int s, val;
273 int k0;
274
275
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6470420 while (N > 2) {
276 /*Lots of pulses case:*/
277
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5602478 if (K >= N) {
278 1666017 const uint32_t *row = ff_celt_pvq_u_row[N];
279
280 /* Are the pulses in this dimension negative? */
281 1666017 p = row[K + 1];
282 1666017 s = -(i >= p);
283 1666017 i -= p & s;
284
285 /*Count how many pulses were placed in this dimension.*/
286 1666017 k0 = K;
287 1666017 q = row[N];
288
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1666017 if (q > i) {
289 268919 K = N;
290 do {
291 387231 p = ff_celt_pvq_u_row[--K][N];
292
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387231 } while (p > i);
293 } else
294
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8742497 for (p = row[K]; p > i; p = row[K])
295 7345399 K--;
296
297 1666017 i -= p;
298 1666017 val = (k0 - K + s) ^ s;
299 1666017 norm += val * val;
300 1666017 *y++ = val;
301 } else { /*Lots of dimensions case:*/
302 /*Are there any pulses in this dimension at all?*/
303 3936461 p = ff_celt_pvq_u_row[K ][N];
304 3936461 q = ff_celt_pvq_u_row[K + 1][N];
305
306
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3936461 if (p <= i && i < q) {
307 2833646 i -= p;
308 2833646 *y++ = 0;
309 } else {
310 /*Are the pulses in this dimension negative?*/
311 1102815 s = -(i >= q);
312 1102815 i -= q & s;
313
314 /*Count how many pulses were placed in this dimension.*/
315 1102815 k0 = K;
316 1284281 do p = ff_celt_pvq_u_row[--K][N];
317
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1284281 while (p > i);
318
319 1102815 i -= p;
320 1102815 val = (k0 - K + s) ^ s;
321 1102815 norm += val * val;
322 1102815 *y++ = val;
323 }
324 }
325 5602478 N--;
326 }
327
328 /* N == 2 */
329 867942 p = 2 * K + 1;
330 867942 s = -(i >= p);
331 867942 i -= p & s;
332 867942 k0 = K;
333 867942 K = (i + 1) / 2;
334
335
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867942 if (K)
336 611968 i -= 2 * K - 1;
337
338 867942 val = (k0 - K + s) ^ s;
339 867942 norm += val * val;
340 867942 *y++ = val;
341
342 /* N==1 */
343 867942 s = -i;
344 867942 val = (K + s) ^ s;
345 867942 norm += val * val;
346 867942 *y = val;
347
348 867942 return norm;
349 }
350
351 static inline void celt_encode_pulses(OpusRangeCoder *rc, int *y, uint32_t N, uint32_t K)
352 {
353 ff_opus_rc_enc_uint(rc, celt_icwrsi(N, K, y), CELT_PVQ_V(N, K));
354 }
355
356 867942 static inline float celt_decode_pulses(OpusRangeCoder *rc, int *y, uint32_t N, uint32_t K)
357 {
358
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867942 const uint32_t idx = ff_opus_rc_dec_uint(rc, CELT_PVQ_V(N, K));
359 867942 return celt_cwrsi(N, K, idx, y);
360 }
361
362 /*
363 * Faster than libopus's search, operates entirely in the signed domain.
364 * Slightly worse/better depending on N, K and the input vector.
365 */
366 static float ppp_pvq_search_c(float *X, int *y, int K, int N)
367 {
368 int i, y_norm = 0;
369 float res = 0.0f, xy_norm = 0.0f;
370
371 for (i = 0; i < N; i++)
372 res += FFABS(X[i]);
373
374 res = K/(res + FLT_EPSILON);
375
376 for (i = 0; i < N; i++) {
377 y[i] = lrintf(res*X[i]);
378 y_norm += y[i]*y[i];
379 xy_norm += y[i]*X[i];
380 K -= FFABS(y[i]);
381 }
382
383 while (K) {
384 int max_idx = 0, phase = FFSIGN(K);
385 float max_num = 0.0f;
386 float max_den = 1.0f;
387 y_norm += 1.0f;
388
389 for (i = 0; i < N; i++) {
390 /* If the sum has been overshot and the best place has 0 pulses allocated
391 * to it, attempting to decrease it further will actually increase the
392 * sum. Prevent this by disregarding any 0 positions when decrementing. */
393 const int ca = 1 ^ ((y[i] == 0) & (phase < 0));
394 const int y_new = y_norm + 2*phase*FFABS(y[i]);
395 float xy_new = xy_norm + 1*phase*FFABS(X[i]);
396 xy_new = xy_new * xy_new;
397 if (ca && (max_den*xy_new) > (y_new*max_num)) {
398 max_den = y_new;
399 max_num = xy_new;
400 max_idx = i;
401 }
402 }
403
404 K -= phase;
405
406 phase *= FFSIGN(X[max_idx]);
407 xy_norm += 1*phase*X[max_idx];
408 y_norm += 2*phase*y[max_idx];
409 y[max_idx] += phase;
410 }
411
412 return (float)y_norm;
413 }
414
415 static uint32_t celt_alg_quant(OpusRangeCoder *rc, float *X, uint32_t N, uint32_t K,
416 enum CeltSpread spread, uint32_t blocks, float gain,
417 CeltPVQ *pvq)
418 {
419 int *y = pvq->qcoeff;
420
421 celt_exp_rotation(X, N, blocks, K, spread, 1);
422 gain /= sqrtf(pvq->pvq_search(X, y, K, N));
423 celt_encode_pulses(rc, y, N, K);
424 celt_normalize_residual(y, X, N, gain);
425 celt_exp_rotation(X, N, blocks, K, spread, 0);
426 return celt_extract_collapse_mask(y, N, blocks);
427 }
428
429 /** Decode pulse vector and combine the result with the pitch vector to produce
430 the final normalised signal in the current band. */
431 867942 static uint32_t celt_alg_unquant(OpusRangeCoder *rc, float *X, uint32_t N, uint32_t K,
432 enum CeltSpread spread, uint32_t blocks, float gain,
433 CeltPVQ *pvq)
434 {
435 867942 int *y = pvq->qcoeff;
436
437 867942 gain /= sqrtf(celt_decode_pulses(rc, y, N, K));
438 867942 celt_normalize_residual(y, X, N, gain);
439 867942 celt_exp_rotation(X, N, blocks, K, spread, 0);
440 867942 return celt_extract_collapse_mask(y, N, blocks);
441 }
442
443 static int celt_calc_theta(const float *X, const float *Y, int coupling, int N)
444 {
445 int i;
446 float e[2] = { 0.0f, 0.0f };
447 if (coupling) { /* Coupling case */
448 for (i = 0; i < N; i++) {
449 e[0] += (X[i] + Y[i])*(X[i] + Y[i]);
450 e[1] += (X[i] - Y[i])*(X[i] - Y[i]);
451 }
452 } else {
453 for (i = 0; i < N; i++) {
454 e[0] += X[i]*X[i];
455 e[1] += Y[i]*Y[i];
456 }
457 }
458 return lrintf(32768.0f*atan2f(sqrtf(e[1]), sqrtf(e[0]))/M_PI);
459 }
460
461 static void celt_stereo_is_decouple(float *X, float *Y, float e_l, float e_r, int N)
462 {
463 int i;
464 const float energy_n = 1.0f/(sqrtf(e_l*e_l + e_r*e_r) + FLT_EPSILON);
465 e_l *= energy_n;
466 e_r *= energy_n;
467 for (i = 0; i < N; i++)
468 X[i] = e_l*X[i] + e_r*Y[i];
469 }
470
471 static void celt_stereo_ms_decouple(float *X, float *Y, int N)
472 {
473 int i;
474 for (i = 0; i < N; i++) {
475 const float Xret = X[i];
476 X[i] = (X[i] + Y[i])*M_SQRT1_2;
477 Y[i] = (Y[i] - Xret)*M_SQRT1_2;
478 }
479 }
480
481 1742927 static av_always_inline uint32_t quant_band_template(CeltPVQ *pvq, CeltFrame *f,
482 OpusRangeCoder *rc,
483 const int band, float *X,
484 float *Y, int N, int b,
485 uint32_t blocks, float *lowband,
486 int duration, float *lowband_out,
487 int level, float gain,
488 float *lowband_scratch,
489 int fill, int quant)
490 {
491 int i;
492 const uint8_t *cache;
493 1742927 int stereo = !!Y, split = stereo;
494 1742927 int imid = 0, iside = 0;
495 1742927 uint32_t N0 = N;
496 1742927 int N_B = N / blocks;
497 1742927 int N_B0 = N_B;
498 1742927 int B0 = blocks;
499 1742927 int time_divide = 0;
500 1742927 int recombine = 0;
501 1742927 int inv = 0;
502 1742927 float mid = 0, side = 0;
503 1742927 int longblocks = (B0 == 1);
504 1742927 uint32_t cm = 0;
505
506
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1742927 if (N == 1) {
507 109648 float *x = X;
508
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285672 for (i = 0; i <= stereo; i++) {
509 176024 int sign = 0;
510
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176024 if (f->remaining2 >= 1 << 3) {
511
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169213 if (quant) {
512 sign = x[0] < 0;
513 ff_opus_rc_put_raw(rc, sign, 1);
514 } else {
515 169213 sign = ff_opus_rc_get_raw(rc, 1);
516 }
517 169213 f->remaining2 -= 1 << 3;
518 }
519 176024 x[0] = 1.0f - 2.0f*sign;
520 176024 x = Y;
521 }
522
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109648 if (lowband_out)
523 109648 lowband_out[0] = X[0];
524 109648 return 1;
525 }
526
527
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1633279 if (!stereo && level == 0) {
528 620101 int tf_change = f->tf_change[band];
529 int k;
530
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620101 if (tf_change > 0)
531 40217 recombine = tf_change;
532 /* Band recombining to increase frequency resolution */
533
534
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620101 if (lowband &&
535
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345387 (recombine || ((N_B & 1) == 0 && tf_change < 0) || B0 > 1)) {
536
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2782289 for (i = 0; i < N; i++)
537 2674010 lowband_scratch[i] = lowband[i];
538 108279 lowband = lowband_scratch;
539 }
540
541
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687901 for (k = 0; k < recombine; k++) {
542
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67800 if (quant || lowband)
543
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42647 celt_haar1(quant ? X : lowband, N >> k, 1 << k);
544 67800 fill = ff_celt_bit_interleave[fill & 0xF] | ff_celt_bit_interleave[fill >> 4] << 2;
545 }
546 620101 blocks >>= recombine;
547 620101 N_B <<= recombine;
548
549 /* Increasing the time resolution */
550
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769739 while ((N_B & 1) == 0 && tf_change < 0) {
551
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149638 if (quant || lowband)
552
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96834 celt_haar1(quant ? X : lowband, N_B, blocks);
553 149638 fill |= fill << blocks;
554 149638 blocks <<= 1;
555 149638 N_B >>= 1;
556 149638 time_divide++;
557 149638 tf_change++;
558 }
559 620101 B0 = blocks;
560 620101 N_B0 = N_B;
561
562 /* Reorganize the samples in time order instead of frequency order */
563
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620101 if (B0 > 1 && (quant || lowband))
564
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90824 celt_deinterleave_hadamard(pvq->hadamard_tmp, quant ? X : lowband,
565 N_B >> recombine, B0 << recombine,
566 longblocks);
567 }
568
569 /* If we need 1.5 more bit than we can produce, split the band in two. */
570 1633279 cache = ff_celt_cache_bits +
571 1633279 ff_celt_cache_index[(duration + 1) * CELT_MAX_BANDS + band];
572
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1633279 if (!stereo && duration >= 0 && b > cache[cache[0]] + 12 && N > 2) {
573 386396 N >>= 1;
574 386396 Y = X + N;
575 386396 split = 1;
576 386396 duration -= 1;
577
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386396 if (blocks == 1)
578 245705 fill = (fill & 1) | (fill << 1);
579 386396 blocks = (blocks + 1) >> 1;
580 }
581
582
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1633279 if (split) {
583 int qn;
584
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626782 int itheta = quant ? celt_calc_theta(X, Y, stereo, N) : 0;
585 int mbits, sbits, delta;
586 int qalloc;
587 int pulse_cap;
588 int offset;
589 int orig_fill;
590 int tell;
591
592 /* Decide on the resolution to give to the split parameter theta */
593 626782 pulse_cap = ff_celt_log_freq_range[band] + duration * 8;
594
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626782 offset = (pulse_cap >> 1) - (stereo && N == 2 ? CELT_QTHETA_OFFSET_TWOPHASE :
595 CELT_QTHETA_OFFSET);
596
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626782 qn = (stereo && band >= f->intensity_stereo) ? 1 :
597 575131 celt_compute_qn(N, b, offset, pulse_cap, stereo);
598 626782 tell = opus_rc_tell_frac(rc);
599
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626782 if (qn != 1) {
600
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573416 if (quant)
601 itheta = (itheta*qn + 8192) >> 14;
602 /* Entropy coding of the angle. We use a uniform pdf for the
603 * time split, a step for stereo, and a triangular one for the rest. */
604
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573416 if (quant) {
605 if (stereo && N > 2)
606 ff_opus_rc_enc_uint_step(rc, itheta, qn / 2);
607 else if (stereo || B0 > 1)
608 ff_opus_rc_enc_uint(rc, itheta, qn + 1);
609 else
610 ff_opus_rc_enc_uint_tri(rc, itheta, qn);
611 itheta = itheta * 16384 / qn;
612 if (stereo) {
613 if (itheta == 0)
614 celt_stereo_is_decouple(X, Y, f->block[0].lin_energy[band],
615 f->block[1].lin_energy[band], N);
616 else
617 celt_stereo_ms_decouple(X, Y, N);
618 }
619 } else {
620
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573416 if (stereo && N > 2)
621 138861 itheta = ff_opus_rc_dec_uint_step(rc, qn / 2);
622
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434555 else if (stereo || B0 > 1)
623 188850 itheta = ff_opus_rc_dec_uint(rc, qn+1);
624 else
625 245705 itheta = ff_opus_rc_dec_uint_tri(rc, qn);
626 573416 itheta = itheta * 16384 / qn;
627 }
628
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53366 } else if (stereo) {
629
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53366 if (quant) {
630 inv = f->apply_phase_inv ? itheta > 8192 : 0;
631 if (inv) {
632 for (i = 0; i < N; i++)
633 Y[i] *= -1;
634 }
635 celt_stereo_is_decouple(X, Y, f->block[0].lin_energy[band],
636 f->block[1].lin_energy[band], N);
637
638 if (b > 2 << 3 && f->remaining2 > 2 << 3) {
639 ff_opus_rc_enc_log(rc, inv, 2);
640 } else {
641 inv = 0;
642 }
643 } else {
644
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53366 inv = (b > 2 << 3 && f->remaining2 > 2 << 3) ? ff_opus_rc_dec_log(rc, 2) : 0;
645
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53366 inv = f->apply_phase_inv ? inv : 0;
646 }
647 53366 itheta = 0;
648 }
649 626782 qalloc = opus_rc_tell_frac(rc) - tell;
650 626782 b -= qalloc;
651
652 626782 orig_fill = fill;
653
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626782 if (itheta == 0) {
654 105651 imid = 32767;
655 105651 iside = 0;
656 105651 fill = av_mod_uintp2(fill, blocks);
657 105651 delta = -16384;
658
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521131 } else if (itheta == 16384) {
659 2246 imid = 0;
660 2246 iside = 32767;
661 2246 fill &= ((1 << blocks) - 1) << blocks;
662 2246 delta = 16384;
663 } else {
664 518885 imid = celt_cos(itheta);
665 518885 iside = celt_cos(16384-itheta);
666 /* This is the mid vs side allocation that minimizes squared error
667 in that band. */
668 518885 delta = ROUND_MUL16((N - 1) << 7, celt_log2tan(iside, imid));
669 }
670
671 626782 mid = imid / 32768.0f;
672 626782 side = iside / 32768.0f;
673
674 /* This is a special case for N=2 that only works for stereo and takes
675 advantage of the fact that mid and side are orthogonal to encode
676 the side with just one bit. */
677
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626782 if (N == 2 && stereo) {
678 int c;
679 54195 int sign = 0;
680 float tmp;
681 float *x2, *y2;
682 54195 mbits = b;
683 /* Only need one bit for the side */
684
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54195 sbits = (itheta != 0 && itheta != 16384) ? 1 << 3 : 0;
685 54195 mbits -= sbits;
686 54195 c = (itheta > 8192);
687 54195 f->remaining2 -= qalloc+sbits;
688
689
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54195 x2 = c ? Y : X;
690
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54195 y2 = c ? X : Y;
691
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54195 if (sbits) {
692
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28840 if (quant) {
693 sign = x2[0]*y2[1] - x2[1]*y2[0] < 0;
694 ff_opus_rc_put_raw(rc, sign, 1);
695 } else {
696 28840 sign = ff_opus_rc_get_raw(rc, 1);
697 }
698 }
699 54195 sign = 1 - 2 * sign;
700 /* We use orig_fill here because we want to fold the side, but if
701 itheta==16384, we'll have cleared the low bits of fill. */
702 54195 cm = pvq->quant_band(pvq, f, rc, band, x2, NULL, N, mbits, blocks, lowband, duration,
703 lowband_out, level, gain, lowband_scratch, orig_fill);
704 /* We don't split N=2 bands, so cm is either 1 or 0 (for a fold-collapse),
705 and there's no need to worry about mixing with the other channel. */
706 54195 y2[0] = -sign * x2[1];
707 54195 y2[1] = sign * x2[0];
708 54195 X[0] *= mid;
709 54195 X[1] *= mid;
710 54195 Y[0] *= side;
711 54195 Y[1] *= side;
712 54195 tmp = X[0];
713 54195 X[0] = tmp - Y[0];
714 54195 Y[0] = tmp + Y[0];
715 54195 tmp = X[1];
716 54195 X[1] = tmp - Y[1];
717 54195 Y[1] = tmp + Y[1];
718 } else {
719 /* "Normal" split code */
720 572587 float *next_lowband2 = NULL;
721 572587 float *next_lowband_out1 = NULL;
722 572587 int next_level = 0;
723 int rebalance;
724 uint32_t cmt;
725
726 /* Give more bits to low-energy MDCTs than they would
727 * otherwise deserve */
728
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572587 if (B0 > 1 && !stereo && (itheta & 0x3fff)) {
729
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139845 if (itheta > 8192)
730 /* Rough approximation for pre-echo masking */
731 61043 delta -= delta >> (4 - duration);
732 else
733 /* Corresponds to a forward-masking slope of
734 * 1.5 dB per 10 ms */
735 78802 delta = FFMIN(0, delta + (N << 3 >> (5 - duration)));
736 }
737 572587 mbits = av_clip((b - delta) / 2, 0, b);
738 572587 sbits = b - mbits;
739 572587 f->remaining2 -= qalloc;
740
741
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572587 if (lowband && !stereo)
742 292101 next_lowband2 = lowband + N; /* >32-bit split case */
743
744 /* Only stereo needs to pass on lowband_out.
745 * Otherwise, it's handled at the end */
746
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572587 if (stereo)
747 186191 next_lowband_out1 = lowband_out;
748 else
749 386396 next_level = level + 1;
750
751 572587 rebalance = f->remaining2;
752
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572587 if (mbits >= sbits) {
753 /* In stereo mode, we do not apply a scaling to the mid
754 * because we need the normalized mid for folding later */
755
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351486 cm = pvq->quant_band(pvq, f, rc, band, X, NULL, N, mbits, blocks,
756 lowband, duration, next_lowband_out1, next_level,
757 stereo ? 1.0f : (gain * mid), lowband_scratch, fill);
758 351486 rebalance = mbits - (rebalance - f->remaining2);
759
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351486 if (rebalance > 3 << 3 && itheta != 0)
760 86536 sbits += rebalance - (3 << 3);
761
762 /* For a stereo split, the high bits of fill are always zero,
763 * so no folding will be done to the side. */
764 351486 cmt = pvq->quant_band(pvq, f, rc, band, Y, NULL, N, sbits, blocks,
765 next_lowband2, duration, NULL, next_level,
766 gain * side, NULL, fill >> blocks);
767 351486 cm |= cmt << ((B0 >> 1) & (stereo - 1));
768 } else {
769 /* For a stereo split, the high bits of fill are always zero,
770 * so no folding will be done to the side. */
771 221101 cm = pvq->quant_band(pvq, f, rc, band, Y, NULL, N, sbits, blocks,
772 next_lowband2, duration, NULL, next_level,
773 gain * side, NULL, fill >> blocks);
774 221101 cm <<= ((B0 >> 1) & (stereo - 1));
775 221101 rebalance = sbits - (rebalance - f->remaining2);
776
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221101 if (rebalance > 3 << 3 && itheta != 16384)
777 80951 mbits += rebalance - (3 << 3);
778
779 /* In stereo mode, we do not apply a scaling to the mid because
780 * we need the normalized mid for folding later */
781
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221101 cm |= pvq->quant_band(pvq, f, rc, band, X, NULL, N, mbits, blocks,
782 lowband, duration, next_lowband_out1, next_level,
783 stereo ? 1.0f : (gain * mid), lowband_scratch, fill);
784 }
785 }
786 } else {
787 /* This is the basic no-split case */
788 1006497 uint32_t q = celt_bits2pulses(cache, b);
789 1006497 uint32_t curr_bits = celt_pulses2bits(cache, q);
790 1006497 f->remaining2 -= curr_bits;
791
792 /* Ensures we can never bust the budget */
793
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1018229 while (f->remaining2 < 0 && q > 0) {
794 11732 f->remaining2 += curr_bits;
795 11732 curr_bits = celt_pulses2bits(cache, --q);
796 11732 f->remaining2 -= curr_bits;
797 }
798
799
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1006497 if (q != 0) {
800 /* Finally do the actual (de)quantization */
801
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867942 if (quant) {
802 cm = celt_alg_quant(rc, X, N, (q < 8) ? q : (8 + (q & 7)) << ((q >> 3) - 1),
803 f->spread, blocks, gain, pvq);
804 } else {
805
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867942 cm = celt_alg_unquant(rc, X, N, (q < 8) ? q : (8 + (q & 7)) << ((q >> 3) - 1),
806 f->spread, blocks, gain, pvq);
807 }
808 } else {
809 /* If there's no pulse, fill the band anyway */
810 138555 uint32_t cm_mask = (1 << blocks) - 1;
811 138555 fill &= cm_mask;
812
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138555 if (fill) {
813
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54172 if (!lowband) {
814 /* Noise */
815
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221642 for (i = 0; i < N; i++)
816 212448 X[i] = (((int32_t)celt_rng(f)) >> 20);
817 9194 cm = cm_mask;
818 } else {
819 /* Folded spectrum */
820
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1817164 for (i = 0; i < N; i++) {
821 /* About 48 dB below the "normal" folding level */
822
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1772186 X[i] = lowband[i] + (((celt_rng(f)) & 0x8000) ? 1.0f / 256 : -1.0f / 256);
823 }
824 44978 cm = fill;
825 }
826 54172 celt_renormalize_vector(X, N, gain);
827 } else {
828 84383 memset(X, 0, N*sizeof(float));
829 }
830 }
831 }
832
833 /* This code is used by the decoder and by the resynthesis-enabled encoder */
834
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1633279 if (stereo) {
835
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240386 if (N > 2)
836 186191 celt_stereo_merge(X, Y, mid, N);
837
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240386 if (inv) {
838
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398220 for (i = 0; i < N; i++)
839 391242 Y[i] *= -1;
840 }
841
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1392893 } else if (level == 0) {
842 int k;
843
844 /* Undo the sample reorganization going from time order to frequency order */
845
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620101 if (B0 > 1)
846 140127 celt_interleave_hadamard(pvq->hadamard_tmp, X, N_B >> recombine,
847 B0 << recombine, longblocks);
848
849 /* Undo time-freq changes that we did earlier */
850 620101 N_B = N_B0;
851 620101 blocks = B0;
852
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769739 for (k = 0; k < time_divide; k++) {
853 149638 blocks >>= 1;
854 149638 N_B <<= 1;
855 149638 cm |= cm >> blocks;
856 149638 celt_haar1(X, N_B, blocks);
857 }
858
859
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687901 for (k = 0; k < recombine; k++) {
860 67800 cm = ff_celt_bit_deinterleave[cm];
861 67800 celt_haar1(X, N0>>k, 1<<k);
862 }
863 620101 blocks <<= recombine;
864
865 /* Scale output for later folding */
866
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620101 if (lowband_out) {
867 433910 float n = sqrtf(N0);
868
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8189280 for (i = 0; i < N0; i++)
869 7755370 lowband_out[i] = n * X[i];
870 }
871 620101 cm = av_mod_uintp2(cm, blocks);
872 }
873
874 1633279 return cm;
875 }
876
877 1742927 static QUANT_FN(pvq_decode_band)
878 {
879 #if CONFIG_OPUS_DECODER
880 1742927 return quant_band_template(pvq, f, rc, band, X, Y, N, b, blocks, lowband, duration,
881 lowband_out, level, gain, lowband_scratch, fill, 0);
882 #else
883 return 0;
884 #endif
885 }
886
887 static QUANT_FN(pvq_encode_band)
888 {
889 #if CONFIG_OPUS_ENCODER
890 return quant_band_template(pvq, f, rc, band, X, Y, N, b, blocks, lowband, duration,
891 lowband_out, level, gain, lowband_scratch, fill, 1);
892 #else
893 return 0;
894 #endif
895 }
896
897 47 int av_cold ff_celt_pvq_init(CeltPVQ **pvq, int encode)
898 {
899 47 CeltPVQ *s = av_malloc(sizeof(CeltPVQ));
900
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47 if (!s)
901 return AVERROR(ENOMEM);
902
903 47 s->pvq_search = ppp_pvq_search_c;
904
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47 s->quant_band = encode ? pvq_encode_band : pvq_decode_band;
905
906 if (CONFIG_OPUS_ENCODER && ARCH_X86)
907 47 ff_celt_pvq_init_x86(s);
908
909 47 *pvq = s;
910
911 47 return 0;
912 }
913
914 47 void av_cold ff_celt_pvq_uninit(CeltPVQ **pvq)
915 {
916 47 av_freep(pvq);
917 47 }
918