FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/opus/pvq.c
Date: 2025-06-01 09:29:47
Exec Total Coverage
Lines: 398 500 79.6%
Functions: 20 28 71.4%
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 <float.h>
27
28 #include "config_components.h"
29
30 #include "libavutil/mem.h"
31 #include "mathops.h"
32 #include "tab.h"
33 #include "pvq.h"
34
35 #define ROUND_MUL16(a,b) ((MUL16(a, b) + 16384) >> 15)
36
37 #define CELT_PVQ_U(n, k) (ff_celt_pvq_u_row[FFMIN(n, k)][FFMAX(n, k)])
38 #define CELT_PVQ_V(n, k) (CELT_PVQ_U(n, k) + CELT_PVQ_U(n, (k) + 1))
39
40 1040324 static inline int16_t celt_cos(int16_t x)
41 {
42 1040324 x = (MUL16(x, x) + 4096) >> 13;
43 1040324 x = (32767-x) + ROUND_MUL16(x, (-7651 + ROUND_MUL16(x, (8277 + ROUND_MUL16(-626, x)))));
44 1040324 return x + 1;
45 }
46
47 520162 static inline int celt_log2tan(int isin, int icos)
48 {
49 int lc, ls;
50 520162 lc = opus_ilog(icos);
51 520162 ls = opus_ilog(isin);
52 520162 icos <<= 15 - lc;
53 520162 isin <<= 15 - ls;
54 520162 return (ls << 11) - (lc << 11) +
55 1040324 ROUND_MUL16(isin, ROUND_MUL16(isin, -2597) + 7932) -
56 520162 ROUND_MUL16(icos, ROUND_MUL16(icos, -2597) + 7932);
57 }
58
59 1009098 static inline int celt_bits2pulses(const uint8_t *cache, int bits)
60 {
61 // TODO: Find the size of cache and make it into an array in the parameters list
62 1009098 int i, low = 0, high;
63
64 1009098 high = cache[0];
65 1009098 bits--;
66
67
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 7063686 for (i = 0; i < 6; i++) {
68 6054588 int center = (low + high + 1) >> 1;
69
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 6054588 if (cache[center] >= bits)
70 3429432 high = center;
71 else
72 2625156 low = center;
73 }
74
75
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 1009098 return (bits - (low == 0 ? -1 : cache[low]) <= cache[high] - bits) ? low : high;
76 }
77
78 1020863 static inline int celt_pulses2bits(const uint8_t *cache, int pulses)
79 {
80 // TODO: Find the size of cache and make it into an array in the parameters list
81
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 1020863 return (pulses == 0) ? 0 : cache[pulses] + 1;
82 }
83
84 869768 static inline void celt_normalize_residual(const int * restrict iy, float * restrict X,
85 int N, float g)
86 {
87 int i;
88
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 8228016 for (i = 0; i < N; i++)
89 7358248 X[i] = g * iy[i];
90 869768 }
91
92 376319 static void celt_exp_rotation_impl(float *X, uint32_t len, uint32_t stride,
93 float c, float s)
94 {
95 float *Xptr;
96 int i;
97
98 376319 Xptr = X;
99
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 5447734 for (i = 0; i < len - stride; i++) {
100 5071415 float x1 = Xptr[0];
101 5071415 float x2 = Xptr[stride];
102 5071415 Xptr[stride] = c * x2 + s * x1;
103 5071415 *Xptr++ = c * x1 - s * x2;
104 }
105
106 376319 Xptr = &X[len - 2 * stride - 1];
107
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 4602529 for (i = len - 2 * stride - 1; i >= 0; i--) {
108 4226210 float x1 = Xptr[0];
109 4226210 float x2 = Xptr[stride];
110 4226210 Xptr[stride] = c * x2 + s * x1;
111 4226210 *Xptr-- = c * x1 - s * x2;
112 }
113 376319 }
114
115 869768 static inline void celt_exp_rotation(float *X, uint32_t len,
116 uint32_t stride, uint32_t K,
117 enum CeltSpread spread, const int encode)
118 {
119 869768 uint32_t stride2 = 0;
120 float c, s;
121 float gain, theta;
122 int i;
123
124
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 869768 if (2*K >= len || spread == CELT_SPREAD_NONE)
125 705774 return;
126
127 163994 gain = (float)len / (len + (20 - 5*spread) * K);
128 163994 theta = M_PI * gain * gain / 4;
129
130 163994 c = cosf(theta);
131 163994 s = sinf(theta);
132
133
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 163994 if (len >= stride << 3) {
134 139484 stride2 = 1;
135 /* This is just a simple (equivalent) way of computing sqrt(len/stride) with rounding.
136 It's basically incrementing long as (stride2+0.5)^2 < len/stride. */
137
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 592379 while ((stride2 * stride2 + stride2) * stride + (stride >> 2) < len)
138 452895 stride2++;
139 }
140
141 163994 len /= stride;
142
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143
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 221835 if (encode) {
144 ✗ celt_exp_rotation_impl(X + i * len, len, 1, c, -s);
145 ✗ if (stride2)
146 ✗ celt_exp_rotation_impl(X + i * len, len, stride2, s, -c);
147 } else {
148
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 221835 if (stride2)
149 154484 celt_exp_rotation_impl(X + i * len, len, stride2, s, c);
150 221835 celt_exp_rotation_impl(X + i * len, len, 1, c, s);
151 }
152 }
153 }
154
155 869768 static inline uint32_t celt_extract_collapse_mask(const int *iy, uint32_t N, uint32_t B)
156 {
157 869768 int i, j, N0 = N / B;
158 869768 uint32_t collapse_mask = 0;
159
160
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 869768 if (B <= 1)
161 742652 return 1;
162
163
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 536514 for (i = 0; i < B; i++)
164
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 1529918 for (j = 0; j < N0; j++)
165 1120520 collapse_mask |= (!!iy[i*N0+j]) << i;
166 127116 return collapse_mask;
167 }
168
169 186425 static inline void celt_stereo_merge(float *X, float *Y, float mid, int N)
170 {
171 int i;
172 186425 float xp = 0, side = 0;
173 float E[2];
174 float mid2;
175 float gain[2];
176
177 /* Compute the norm of X+Y and X-Y as |X|^2 + |Y|^2 +/- sum(xy) */
178
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 4486101 for (i = 0; i < N; i++) {
179 4299676 xp += X[i] * Y[i];
180 4299676 side += Y[i] * Y[i];
181 }
182
183 /* Compensating for the mid normalization */
184 186425 xp *= mid;
185 186425 mid2 = mid;
186 186425 E[0] = mid2 * mid2 + side - 2 * xp;
187 186425 E[1] = mid2 * mid2 + side + 2 * xp;
188
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 186425 if (E[0] < 6e-4f || E[1] < 6e-4f) {
189
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 1154 for (i = 0; i < N; i++)
190 998 Y[i] = X[i];
191 156 return;
192 }
193
194 186269 gain[0] = 1.0f / sqrtf(E[0]);
195 186269 gain[1] = 1.0f / sqrtf(E[1]);
196
197
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 4484947 for (i = 0; i < N; i++) {
198 float value[2];
199 /* Apply mid scaling (side is already scaled) */
200 4298678 value[0] = mid * X[i];
201 4298678 value[1] = Y[i];
202 4298678 X[i] = gain[0] * (value[0] - value[1]);
203 4298678 Y[i] = gain[1] * (value[0] + value[1]);
204 }
205 }
206
207 140557 static void celt_interleave_hadamard(float *tmp, float *X, int N0,
208 int stride, int hadamard)
209 {
210 140557 int i, j, N = N0*stride;
211
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 140557 const uint8_t *order = &ff_celt_hadamard_order[hadamard ? stride - 2 : 30];
212
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 889255 for (i = 0; i < stride; i++)
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 4417802 for (j = 0; j < N0; j++)
215 3669104 tmp[j*stride+i] = X[order[i]*N0+j];
216
217 140557 memcpy(X, tmp, N*sizeof(float));
218 140557 }
219
220 91168 static void celt_deinterleave_hadamard(float *tmp, float *X, int N0,
221 int stride, int hadamard)
222 {
223 91168 int i, j, N = N0*stride;
224
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 91168 const uint8_t *order = &ff_celt_hadamard_order[hadamard ? stride - 2 : 30];
225
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 559816 for (i = 0; i < stride; i++)
227
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 2758954 for (j = 0; j < N0; j++)
228 2290306 tmp[order[i]*N0+j] = X[j*stride+i];
229
230 91168 memcpy(X, tmp, N*sizeof(float));
231 91168 }
232
233 357319 static void celt_haar1(float *X, int N0, int stride)
234 {
235 int i, j;
236 357319 N0 >>= 1;
237
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238
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 5814715 for (j = 0; j < N0; j++) {
239 5137144 float x0 = X[stride * (2 * j + 0) + i];
240 5137144 float x1 = X[stride * (2 * j + 1) + i];
241 5137144 X[stride * (2 * j + 0) + i] = (x0 + x1) * M_SQRT1_2;
242 5137144 X[stride * (2 * j + 1) + i] = (x0 - x1) * M_SQRT1_2;
243 }
244 }
245 357319 }
246
247 576688 static inline int celt_compute_qn(int N, int b, int offset, int pulse_cap,
248 int stereo)
249 {
250 int qn, qb;
251 576688 int N2 = 2 * N - 1;
252
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 576688 if (stereo && N == 2)
253 48661 N2--;
254
255 /* The upper limit ensures that in a stereo split with itheta==16384, we'll
256 * always have enough bits left over to code at least one pulse in the
257 * side; otherwise it would collapse, since it doesn't get folded. */
258 576688 qb = FFMIN3(b - pulse_cap - (4 << 3), (b + N2 * offset) / N2, 8 << 3);
259
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 576688 qn = (qb < (1 << 3 >> 1)) ? 1 : ((ff_celt_qn_exp2[qb & 0x7] >> (14 - (qb >> 3))) + 1) >> 1 << 1;
260 576688 return qn;
261 }
262
263 /* Convert the quantized vector to an index */
264 ✗ static inline uint32_t celt_icwrsi(uint32_t N, uint32_t K, const int *y)
265 {
266 ✗ int i, idx = 0, sum = 0;
267 ✗ for (i = N - 1; i >= 0; i--) {
268 ✗ const uint32_t i_s = CELT_PVQ_U(N - i, sum + FFABS(y[i]) + 1);
269 ✗ idx += CELT_PVQ_U(N - i, sum) + (y[i] < 0)*i_s;
270 ✗ sum += FFABS(y[i]);
271 }
272 ✗ return idx;
273 }
274
275 // this code was adapted from libopus
276 869768 static inline uint64_t celt_cwrsi(uint32_t N, uint32_t K, uint32_t i, int *y)
277 {
278 869768 uint64_t norm = 0;
279 uint32_t q, p;
280 int s, val;
281 int k0;
282
283
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 6488480 while (N > 2) {
284 /*Lots of pulses case:*/
285
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 5618712 if (K >= N) {
286 1670295 const uint32_t *row = ff_celt_pvq_u_row[N];
287
288 /* Are the pulses in this dimension negative? */
289 1670295 p = row[K + 1];
290 1670295 s = -(i >= p);
291 1670295 i -= p & s;
292
293 /*Count how many pulses were placed in this dimension.*/
294 1670295 k0 = K;
295 1670295 q = row[N];
296
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 1670295 if (q > i) {
297 269437 K = N;
298 do {
299 388229 p = ff_celt_pvq_u_row[--K][N];
300
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 388229 } while (p > i);
301 } else
302
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 8765314 for (p = row[K]; p > i; p = row[K])
303 7364456 K--;
304
305 1670295 i -= p;
306 1670295 val = (k0 - K + s) ^ s;
307 1670295 norm += val * val;
308 1670295 *y++ = val;
309 } else { /*Lots of dimensions case:*/
310 /*Are there any pulses in this dimension at all?*/
311 3948417 p = ff_celt_pvq_u_row[K ][N];
312 3948417 q = ff_celt_pvq_u_row[K + 1][N];
313
314
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 3948417 if (p <= i && i < q) {
315 2842454 i -= p;
316 2842454 *y++ = 0;
317 } else {
318 /*Are the pulses in this dimension negative?*/
319 1105963 s = -(i >= q);
320 1105963 i -= q & s;
321
322 /*Count how many pulses were placed in this dimension.*/
323 1105963 k0 = K;
324 1287869 do p = ff_celt_pvq_u_row[--K][N];
325
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 1287869 while (p > i);
326
327 1105963 i -= p;
328 1105963 val = (k0 - K + s) ^ s;
329 1105963 norm += val * val;
330 1105963 *y++ = val;
331 }
332 }
333 5618712 N--;
334 }
335
336 /* N == 2 */
337 869768 p = 2 * K + 1;
338 869768 s = -(i >= p);
339 869768 i -= p & s;
340 869768 k0 = K;
341 869768 K = (i + 1) / 2;
342
343
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 869768 if (K)
344 613142 i -= 2 * K - 1;
345
346 869768 val = (k0 - K + s) ^ s;
347 869768 norm += val * val;
348 869768 *y++ = val;
349
350 /* N==1 */
351 869768 s = -i;
352 869768 val = (K + s) ^ s;
353 869768 norm += val * val;
354 869768 *y = val;
355
356 869768 return norm;
357 }
358
359 ✗ static inline void celt_encode_pulses(OpusRangeCoder *rc, int *y, uint32_t N, uint32_t K)
360 {
361 ✗ ff_opus_rc_enc_uint(rc, celt_icwrsi(N, K, y), CELT_PVQ_V(N, K));
362 ✗ }
363
364 869768 static inline float celt_decode_pulses(OpusRangeCoder *rc, int *y, uint32_t N, uint32_t K)
365 {
366
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 869768 const uint32_t idx = ff_opus_rc_dec_uint(rc, CELT_PVQ_V(N, K));
367 869768 return celt_cwrsi(N, K, idx, y);
368 }
369
370 #if CONFIG_OPUS_ENCODER
371 /*
372 * Faster than libopus's search, operates entirely in the signed domain.
373 * Slightly worse/better depending on N, K and the input vector.
374 */
375 ✗ static float ppp_pvq_search_c(float *X, int *y, int K, int N)
376 {
377 ✗ int i, y_norm = 0;
378 ✗ float res = 0.0f, xy_norm = 0.0f;
379
380 ✗ for (i = 0; i < N; i++)
381 ✗ res += FFABS(X[i]);
382
383 ✗ res = K/(res + FLT_EPSILON);
384
385 ✗ for (i = 0; i < N; i++) {
386 ✗ y[i] = lrintf(res*X[i]);
387 ✗ y_norm += y[i]*y[i];
388 ✗ xy_norm += y[i]*X[i];
389 ✗ K -= FFABS(y[i]);
390 }
391
392 ✗ while (K) {
393 ✗ int max_idx = 0, phase = FFSIGN(K);
394 ✗ float max_num = 0.0f;
395 ✗ float max_den = 1.0f;
396 ✗ y_norm += 1.0f;
397
398 ✗ for (i = 0; i < N; i++) {
399 /* If the sum has been overshot and the best place has 0 pulses allocated
400 * to it, attempting to decrease it further will actually increase the
401 * sum. Prevent this by disregarding any 0 positions when decrementing. */
402 ✗ const int ca = 1 ^ ((y[i] == 0) & (phase < 0));
403 ✗ const int y_new = y_norm + 2*phase*FFABS(y[i]);
404 ✗ float xy_new = xy_norm + 1*phase*FFABS(X[i]);
405 ✗ xy_new = xy_new * xy_new;
406 ✗ if (ca && (max_den*xy_new) > (y_new*max_num)) {
407 ✗ max_den = y_new;
408 ✗ max_num = xy_new;
409 ✗ max_idx = i;
410 }
411 }
412
413 ✗ K -= phase;
414
415 ✗ phase *= FFSIGN(X[max_idx]);
416 ✗ xy_norm += 1*phase*X[max_idx];
417 ✗ y_norm += 2*phase*y[max_idx];
418 ✗ y[max_idx] += phase;
419 }
420
421 ✗ return (float)y_norm;
422 }
423 #endif
424
425 ✗ static uint32_t celt_alg_quant(OpusRangeCoder *rc, float *X, uint32_t N, uint32_t K,
426 enum CeltSpread spread, uint32_t blocks, float gain,
427 CeltPVQ *pvq)
428 {
429 ✗ int *y = pvq->qcoeff;
430
431 ✗ celt_exp_rotation(X, N, blocks, K, spread, 1);
432 ✗ gain /= sqrtf(pvq->pvq_search(X, y, K, N));
433 ✗ celt_encode_pulses(rc, y, N, K);
434 ✗ celt_normalize_residual(y, X, N, gain);
435 ✗ celt_exp_rotation(X, N, blocks, K, spread, 0);
436 ✗ return celt_extract_collapse_mask(y, N, blocks);
437 }
438
439 /** Decode pulse vector and combine the result with the pitch vector to produce
440 the final normalised signal in the current band. */
441 869768 static uint32_t celt_alg_unquant(OpusRangeCoder *rc, float *X, uint32_t N, uint32_t K,
442 enum CeltSpread spread, uint32_t blocks, float gain,
443 CeltPVQ *pvq)
444 {
445 869768 int *y = pvq->qcoeff;
446
447 869768 gain /= sqrtf(celt_decode_pulses(rc, y, N, K));
448 869768 celt_normalize_residual(y, X, N, gain);
449 869768 celt_exp_rotation(X, N, blocks, K, spread, 0);
450 869768 return celt_extract_collapse_mask(y, N, blocks);
451 }
452
453 ✗ static int celt_calc_theta(const float *X, const float *Y, int coupling, int N)
454 {
455 int i;
456 ✗ float e[2] = { 0.0f, 0.0f };
457 ✗ if (coupling) { /* Coupling case */
458 ✗ for (i = 0; i < N; i++) {
459 ✗ e[0] += (X[i] + Y[i])*(X[i] + Y[i]);
460 ✗ e[1] += (X[i] - Y[i])*(X[i] - Y[i]);
461 }
462 } else {
463 ✗ for (i = 0; i < N; i++) {
464 ✗ e[0] += X[i]*X[i];
465 ✗ e[1] += Y[i]*Y[i];
466 }
467 }
468 ✗ return lrintf(32768.0f*atan2f(sqrtf(e[1]), sqrtf(e[0]))/M_PI);
469 }
470
471 ✗ static void celt_stereo_is_decouple(float *X, float *Y, float e_l, float e_r, int N)
472 {
473 int i;
474 ✗ const float energy_n = 1.0f/(sqrtf(e_l*e_l + e_r*e_r) + FLT_EPSILON);
475 ✗ e_l *= energy_n;
476 ✗ e_r *= energy_n;
477 ✗ for (i = 0; i < N; i++)
478 ✗ X[i] = e_l*X[i] + e_r*Y[i];
479 ✗ }
480
481 ✗ static void celt_stereo_ms_decouple(float *X, float *Y, int N)
482 {
483 int i;
484 ✗ for (i = 0; i < N; i++) {
485 ✗ const float Xret = X[i];
486 ✗ X[i] = (X[i] + Y[i])*M_SQRT1_2;
487 ✗ Y[i] = (Y[i] - Xret)*M_SQRT1_2;
488 }
489 ✗ }
490
491 1747319 static av_always_inline uint32_t quant_band_template(CeltPVQ *pvq, CeltFrame *f,
492 OpusRangeCoder *rc,
493 const int band, float *X,
494 float *Y, int N, int b,
495 uint32_t blocks, float *lowband,
496 int duration, float *lowband_out,
497 int level, float gain,
498 float *lowband_scratch,
499 int fill, int quant)
500 {
501 int i;
502 const uint8_t *cache;
503 1747319 int stereo = !!Y, split = stereo;
504 1747319 int imid = 0, iside = 0;
505 1747319 uint32_t N0 = N;
506 1747319 int N_B = N / blocks;
507 1747319 int N_B0 = N_B;
508 1747319 int B0 = blocks;
509 1747319 int time_divide = 0;
510 1747319 int recombine = 0;
511 1747319 int inv = 0;
512 1747319 float mid = 0, side = 0;
513 1747319 int longblocks = (B0 == 1);
514 1747319 uint32_t cm = 0;
515
516
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 1747319 if (N == 1) {
517 109648 float *x = X;
518
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 285672 for (i = 0; i <= stereo; i++) {
519 176024 int sign = 0;
520
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 176024 if (f->remaining2 >= 1 << 3) {
521
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 169213 if (quant) {
522 ✗ sign = x[0] < 0;
523 ✗ ff_opus_rc_put_raw(rc, sign, 1);
524 } else {
525 169213 sign = ff_opus_rc_get_raw(rc, 1);
526 }
527 169213 f->remaining2 -= 1 << 3;
528 }
529 176024 x[0] = 1.0f - 2.0f*sign;
530 176024 x = Y;
531 }
532
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 109648 if (lowband_out)
533 109648 lowband_out[0] = X[0];
534 109648 return 1;
535 }
536
537
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 1637671 if (!stereo && level == 0) {
538 621145 int tf_change = f->tf_change[band];
539 int k;
540
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 621145 if (tf_change > 0)
541 40217 recombine = tf_change;
542 /* Band recombining to increase frequency resolution */
543
544
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 621145 if (lowband &&
545
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 346083 (recombine || ((N_B & 1) == 0 && tf_change < 0) || B0 > 1)) {
546
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 2795449 for (i = 0; i < N; i++)
547 2686826 lowband_scratch[i] = lowband[i];
548 108623 lowband = lowband_scratch;
549 }
550
551
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 688945 for (k = 0; k < recombine; k++) {
552
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 67800 if (quant || lowband)
553
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 42647 celt_haar1(quant ? X : lowband, N >> k, 1 << k);
554 67800 fill = ff_celt_bit_interleave[fill & 0xF] | ff_celt_bit_interleave[fill >> 4] << 2;
555 }
556 621145 blocks >>= recombine;
557 621145 N_B <<= recombine;
558
559 /* Increasing the time resolution */
560
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 770983 while ((N_B & 1) == 0 && tf_change < 0) {
561
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 149838 if (quant || lowband)
562
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 97034 celt_haar1(quant ? X : lowband, N_B, blocks);
563 149838 fill |= fill << blocks;
564 149838 blocks <<= 1;
565 149838 N_B >>= 1;
566 149838 time_divide++;
567 149838 tf_change++;
568 }
569 621145 B0 = blocks;
570 621145 N_B0 = N_B;
571
572 /* Reorganize the samples in time order instead of frequency order */
573
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 621145 if (B0 > 1 && (quant || lowband))
574
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 91168 celt_deinterleave_hadamard(pvq->hadamard_tmp, quant ? X : lowband,
575 N_B >> recombine, B0 << recombine,
576 longblocks);
577 }
578
579 /* If we need 1.5 more bit than we can produce, split the band in two. */
580 1637671 cache = ff_celt_cache_bits +
581 1637671 ff_celt_cache_index[(duration + 1) * CELT_MAX_BANDS + band];
582
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 1637671 if (!stereo && duration >= 0 && b > cache[cache[0]] + 12 && N > 2) {
583 387953 N >>= 1;
584 387953 Y = X + N;
585 387953 split = 1;
586 387953 duration -= 1;
587
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 387953 if (blocks == 1)
588 246169 fill = (fill & 1) | (fill << 1);
589 387953 blocks = (blocks + 1) >> 1;
590 }
591
592
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 1637671 if (split) {
593 int qn;
594
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 628573 int itheta = quant ? celt_calc_theta(X, Y, stereo, N) : 0;
595 int mbits, sbits, delta;
596 int qalloc;
597 int pulse_cap;
598 int offset;
599 int orig_fill;
600 int tell;
601
602 /* Decide on the resolution to give to the split parameter theta */
603 628573 pulse_cap = ff_celt_log_freq_range[band] + duration * 8;
604
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 628573 offset = (pulse_cap >> 1) - (stereo && N == 2 ? CELT_QTHETA_OFFSET_TWOPHASE :
605 CELT_QTHETA_OFFSET);
606
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 628573 qn = (stereo && band >= f->intensity_stereo) ? 1 :
607 576688 celt_compute_qn(N, b, offset, pulse_cap, stereo);
608 628573 tell = opus_rc_tell_frac(rc);
609
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 628573 if (qn != 1) {
610
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 574973 if (quant)
611 ✗ itheta = (itheta*qn + 8192) >> 14;
612 /* Entropy coding of the angle. We use a uniform pdf for the
613 * time split, a step for stereo, and a triangular one for the rest. */
614
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 574973 if (quant) {
615 ✗ if (stereo && N > 2)
616 ✗ ff_opus_rc_enc_uint_step(rc, itheta, qn / 2);
617 ✗ else if (stereo || B0 > 1)
618 ✗ ff_opus_rc_enc_uint(rc, itheta, qn + 1);
619 else
620 ✗ ff_opus_rc_enc_uint_tri(rc, itheta, qn);
621 ✗ itheta = itheta * 16384 / qn;
622 ✗ if (stereo) {
623 ✗ if (itheta == 0)
624 ✗ celt_stereo_is_decouple(X, Y, f->block[0].lin_energy[band],
625 f->block[1].lin_energy[band], N);
626 else
627 ✗ celt_stereo_ms_decouple(X, Y, N);
628 }
629 } else {
630
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 574973 if (stereo && N > 2)
631 138861 itheta = ff_opus_rc_dec_uint_step(rc, qn / 2);
632
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 436112 else if (stereo || B0 > 1)
633 189943 itheta = ff_opus_rc_dec_uint(rc, qn+1);
634 else
635 246169 itheta = ff_opus_rc_dec_uint_tri(rc, qn);
636 574973 itheta = itheta * 16384 / qn;
637 }
638
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 53600 } else if (stereo) {
639
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 53600 if (quant) {
640 ✗ inv = f->apply_phase_inv ? itheta > 8192 : 0;
641 ✗ if (inv) {
642 ✗ for (i = 0; i < N; i++)
643 ✗ Y[i] *= -1;
644 }
645 ✗ celt_stereo_is_decouple(X, Y, f->block[0].lin_energy[band],
646 f->block[1].lin_energy[band], N);
647
648 ✗ if (b > 2 << 3 && f->remaining2 > 2 << 3) {
649 ✗ ff_opus_rc_enc_log(rc, inv, 2);
650 } else {
651 ✗ inv = 0;
652 }
653 } else {
654
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 53600 inv = (b > 2 << 3 && f->remaining2 > 2 << 3) ? ff_opus_rc_dec_log(rc, 2) : 0;
655
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 53600 inv = f->apply_phase_inv ? inv : 0;
656 }
657 53600 itheta = 0;
658 }
659 628573 qalloc = opus_rc_tell_frac(rc) - tell;
660 628573 b -= qalloc;
661
662 628573 orig_fill = fill;
663
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 628573 if (itheta == 0) {
664 106003 imid = 32767;
665 106003 iside = 0;
666 106003 fill = av_zero_extend(fill, blocks);
667 106003 delta = -16384;
668
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 522570 } else if (itheta == 16384) {
669 2408 imid = 0;
670 2408 iside = 32767;
671 2408 fill &= ((1 << blocks) - 1) << blocks;
672 2408 delta = 16384;
673 } else {
674 520162 imid = celt_cos(itheta);
675 520162 iside = celt_cos(16384-itheta);
676 /* This is the mid vs side allocation that minimizes squared error
677 in that band. */
678 520162 delta = ROUND_MUL16((N - 1) << 7, celt_log2tan(iside, imid));
679 }
680
681 628573 mid = imid / 32768.0f;
682 628573 side = iside / 32768.0f;
683
684 /* This is a special case for N=2 that only works for stereo and takes
685 advantage of the fact that mid and side are orthogonal to encode
686 the side with just one bit. */
687
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 628573 if (N == 2 && stereo) {
688 int c;
689 54195 int sign = 0;
690 float tmp;
691 float *x2, *y2;
692 54195 mbits = b;
693 /* Only need one bit for the side */
694
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 54195 sbits = (itheta != 0 && itheta != 16384) ? 1 << 3 : 0;
695 54195 mbits -= sbits;
696 54195 c = (itheta > 8192);
697 54195 f->remaining2 -= qalloc+sbits;
698
699
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 54195 x2 = c ? Y : X;
700
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 54195 y2 = c ? X : Y;
701
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 54195 if (sbits) {
702
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 28840 if (quant) {
703 ✗ sign = x2[0]*y2[1] - x2[1]*y2[0] < 0;
704 ✗ ff_opus_rc_put_raw(rc, sign, 1);
705 } else {
706 28840 sign = ff_opus_rc_get_raw(rc, 1);
707 }
708 }
709 54195 sign = 1 - 2 * sign;
710 /* We use orig_fill here because we want to fold the side, but if
711 itheta==16384, we'll have cleared the low bits of fill. */
712 54195 cm = pvq->quant_band(pvq, f, rc, band, x2, NULL, N, mbits, blocks, lowband, duration,
713 lowband_out, level, gain, lowband_scratch, orig_fill);
714 /* We don't split N=2 bands, so cm is either 1 or 0 (for a fold-collapse),
715 and there's no need to worry about mixing with the other channel. */
716 54195 y2[0] = -sign * x2[1];
717 54195 y2[1] = sign * x2[0];
718 54195 X[0] *= mid;
719 54195 X[1] *= mid;
720 54195 Y[0] *= side;
721 54195 Y[1] *= side;
722 54195 tmp = X[0];
723 54195 X[0] = tmp - Y[0];
724 54195 Y[0] = tmp + Y[0];
725 54195 tmp = X[1];
726 54195 X[1] = tmp - Y[1];
727 54195 Y[1] = tmp + Y[1];
728 } else {
729 /* "Normal" split code */
730 574378 float *next_lowband2 = NULL;
731 574378 float *next_lowband_out1 = NULL;
732 574378 int next_level = 0;
733 int rebalance;
734 uint32_t cmt;
735
736 /* Give more bits to low-energy MDCTs than they would
737 * otherwise deserve */
738
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 574378 if (B0 > 1 && !stereo && (itheta & 0x3fff)) {
739
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 140658 if (itheta > 8192)
740 /* Rough approximation for pre-echo masking */
741 61444 delta -= delta >> (4 - duration);
742 else
743 /* Corresponds to a forward-masking slope of
744 * 1.5 dB per 10 ms */
745 79214 delta = FFMIN(0, delta + (N << 3 >> (5 - duration)));
746 }
747 574378 mbits = av_clip((b - delta) / 2, 0, b);
748 574378 sbits = b - mbits;
749 574378 f->remaining2 -= qalloc;
750
751
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 574378 if (lowband && !stereo)
752 293450 next_lowband2 = lowband + N; /* >32-bit split case */
753
754 /* Only stereo needs to pass on lowband_out.
755 * Otherwise, it's handled at the end */
756
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 574378 if (stereo)
757 186425 next_lowband_out1 = lowband_out;
758 else
759 387953 next_level = level + 1;
760
761 574378 rebalance = f->remaining2;
762
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 574378 if (mbits >= sbits) {
763 /* In stereo mode, we do not apply a scaling to the mid
764 * because we need the normalized mid for folding later */
765
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 352348 cm = pvq->quant_band(pvq, f, rc, band, X, NULL, N, mbits, blocks,
766 lowband, duration, next_lowband_out1, next_level,
767 stereo ? 1.0f : (gain * mid), lowband_scratch, fill);
768 352348 rebalance = mbits - (rebalance - f->remaining2);
769
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 352348 if (rebalance > 3 << 3 && itheta != 0)
770 86671 sbits += rebalance - (3 << 3);
771
772 /* For a stereo split, the high bits of fill are always zero,
773 * so no folding will be done to the side. */
774 352348 cmt = pvq->quant_band(pvq, f, rc, band, Y, NULL, N, sbits, blocks,
775 next_lowband2, duration, NULL, next_level,
776 gain * side, NULL, fill >> blocks);
777 352348 cm |= cmt << ((B0 >> 1) & (stereo - 1));
778 } else {
779 /* For a stereo split, the high bits of fill are always zero,
780 * so no folding will be done to the side. */
781 222030 cm = pvq->quant_band(pvq, f, rc, band, Y, NULL, N, sbits, blocks,
782 next_lowband2, duration, NULL, next_level,
783 gain * side, NULL, fill >> blocks);
784 222030 cm <<= ((B0 >> 1) & (stereo - 1));
785 222030 rebalance = sbits - (rebalance - f->remaining2);
786
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 222030 if (rebalance > 3 << 3 && itheta != 16384)
787 81157 mbits += rebalance - (3 << 3);
788
789 /* In stereo mode, we do not apply a scaling to the mid because
790 * we need the normalized mid for folding later */
791
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 222030 cm |= pvq->quant_band(pvq, f, rc, band, X, NULL, N, mbits, blocks,
792 lowband, duration, next_lowband_out1, next_level,
793 stereo ? 1.0f : (gain * mid), lowband_scratch, fill);
794 }
795 }
796 } else {
797 /* This is the basic no-split case */
798 1009098 uint32_t q = celt_bits2pulses(cache, b);
799 1009098 uint32_t curr_bits = celt_pulses2bits(cache, q);
800 1009098 f->remaining2 -= curr_bits;
801
802 /* Ensures we can never bust the budget */
803
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 1020863 while (f->remaining2 < 0 && q > 0) {
804 11765 f->remaining2 += curr_bits;
805 11765 curr_bits = celt_pulses2bits(cache, --q);
806 11765 f->remaining2 -= curr_bits;
807 }
808
809
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 1009098 if (q != 0) {
810 /* Finally do the actual (de)quantization */
811
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 869768 if (quant) {
812 ✗ cm = celt_alg_quant(rc, X, N, (q < 8) ? q : (8 + (q & 7)) << ((q >> 3) - 1),
813 f->spread, blocks, gain, pvq);
814 } else {
815
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 869768 cm = celt_alg_unquant(rc, X, N, (q < 8) ? q : (8 + (q & 7)) << ((q >> 3) - 1),
816 f->spread, blocks, gain, pvq);
817 }
818 } else {
819 /* If there's no pulse, fill the band anyway */
820 139330 uint32_t cm_mask = (1 << blocks) - 1;
821 139330 fill &= cm_mask;
822
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 139330 if (fill) {
823
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 54433 if (!lowband) {
824 /* Noise */
825
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 221775 for (i = 0; i < N; i++)
826 212568 X[i] = (((int32_t)celt_rng(f)) >> 20);
827 9207 cm = cm_mask;
828 } else {
829 /* Folded spectrum */
830
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 1828324 for (i = 0; i < N; i++) {
831 /* About 48 dB below the "normal" folding level */
832
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 1783098 X[i] = lowband[i] + (((celt_rng(f)) & 0x8000) ? 1.0f / 256 : -1.0f / 256);
833 }
834 45226 cm = fill;
835 }
836 54433 celt_renormalize_vector(X, N, gain);
837 } else {
838 84897 memset(X, 0, N*sizeof(float));
839 }
840 }
841 }
842
843 /* This code is used by the decoder and by the resynthesis-enabled encoder */
844
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 1637671 if (stereo) {
845
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 240620 if (N > 2)
846 186425 celt_stereo_merge(X, Y, mid, N);
847
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 240620 if (inv) {
848
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 398220 for (i = 0; i < N; i++)
849 391242 Y[i] *= -1;
850 }
851
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 1397051 } else if (level == 0) {
852 int k;
853
854 /* Undo the sample reorganization going from time order to frequency order */
855
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 621145 if (B0 > 1)
856 140557 celt_interleave_hadamard(pvq->hadamard_tmp, X, N_B >> recombine,
857 B0 << recombine, longblocks);
858
859 /* Undo time-freq changes that we did earlier */
860 621145 N_B = N_B0;
861 621145 blocks = B0;
862
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 770983 for (k = 0; k < time_divide; k++) {
863 149838 blocks >>= 1;
864 149838 N_B <<= 1;
865 149838 cm |= cm >> blocks;
866 149838 celt_haar1(X, N_B, blocks);
867 }
868
869
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 688945 for (k = 0; k < recombine; k++) {
870 67800 cm = ff_celt_bit_deinterleave[cm];
871 67800 celt_haar1(X, N0>>k, 1<<k);
872 }
873 621145 blocks <<= recombine;
874
875 /* Scale output for later folding */
876
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 621145 if (lowband_out) {
877 434720 float n = sqrtf(N0);
878
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 8224490 for (i = 0; i < N0; i++)
879 7789770 lowband_out[i] = n * X[i];
880 }
881 621145 cm = av_zero_extend(cm, blocks);
882 }
883
884 1637671 return cm;
885 }
886
887 1747319 static QUANT_FN(pvq_decode_band)
888 {
889 #if CONFIG_OPUS_DECODER
890 1747319 return quant_band_template(pvq, f, rc, band, X, Y, N, b, blocks, lowband, duration,
891 lowband_out, level, gain, lowband_scratch, fill, 0);
892 #else
893 return 0;
894 #endif
895 }
896
897 ✗ static QUANT_FN(pvq_encode_band)
898 {
899 #if CONFIG_OPUS_ENCODER
900 ✗ return quant_band_template(pvq, f, rc, band, X, Y, N, b, blocks, lowband, duration,
901 lowband_out, level, gain, lowband_scratch, fill, 1);
902 #else
903 return 0;
904 #endif
905 }
906
907 104 int av_cold ff_celt_pvq_init(CeltPVQ **pvq, int encode)
908 {
909 104 CeltPVQ *s = av_malloc(sizeof(CeltPVQ));
910
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 104 if (!s)
911 ✗ return AVERROR(ENOMEM);
912
913
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 104 s->quant_band = encode ? pvq_encode_band : pvq_decode_band;
914
915 #if CONFIG_OPUS_ENCODER
916 104 s->pvq_search = ppp_pvq_search_c;
917 #if ARCH_X86
918 104 ff_celt_pvq_init_x86(s);
919 #endif
920 #endif
921
922 104 *pvq = s;
923
924 104 return 0;
925 }
926
927 104 void av_cold ff_celt_pvq_uninit(CeltPVQ **pvq)
928 {
929 104 av_freep(pvq);
930 104 }
931