FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/opusdec_celt.c
Date: 2024-04-25 15:36:26
Exec Total Coverage
Lines: 295 317 93.1%
Functions: 13 13 100.0%
Branches: 192 210 91.4%
Line Branch Exec Source
1 /*
2 * Copyright (c) 2012 Andrew D'Addesio
3 * Copyright (c) 2013-2014 Mozilla Corporation
4 * Copyright (c) 2016 Rostislav Pehlivanov <atomnuker@gmail.com>
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 /**
24 * @file
25 * Opus CELT decoder
26 */
27
28 #include <float.h>
29
30 #include "libavutil/mem.h"
31 #include "opus_celt.h"
32 #include "opustab.h"
33 #include "opus_pvq.h"
34
35 /* Use the 2D z-transform to apply prediction in both the time domain (alpha)
36 * and the frequency domain (beta) */
37 29947 static void celt_decode_coarse_energy(CeltFrame *f, OpusRangeCoder *rc)
38 {
39 int i, j;
40 29947 float prev[2] = { 0 };
41 29947 float alpha = ff_celt_alpha_coef[f->size];
42 29947 float beta = ff_celt_beta_coef[f->size];
43 29947 const uint8_t *model = ff_celt_coarse_energy_dist[f->size][0];
44
45 /* intra frame */
46
4/4
✓ Branch 1 taken 29821 times.
✓ Branch 2 taken 126 times.
✓ Branch 4 taken 5882 times.
✓ Branch 5 taken 23939 times.
 29947 if (opus_rc_tell(rc) + 3 <= f->framebits && ff_opus_rc_dec_log(rc, 3)) {
47 5882 alpha = 0.0f;
48 5882 beta = 1.0f - (4915.0f/32768.0f);
49 5882 model = ff_celt_coarse_energy_dist[f->size][1];
50 }
51
52
2/2
✓ Branch 0 taken 628887 times.
✓ Branch 1 taken 29947 times.
 658834 for (i = 0; i < CELT_MAX_BANDS; i++) {
53
2/2
✓ Branch 0 taken 1023645 times.
✓ Branch 1 taken 628887 times.
 1652532 for (j = 0; j < f->channels; j++) {
54 1023645 CeltBlock *block = &f->block[j];
55 float value;
56 int available;
57
58
4/4
✓ Branch 0 taken 898049 times.
✓ Branch 1 taken 125596 times.
✓ Branch 2 taken 47336 times.
✓ Branch 3 taken 850713 times.
 1023645 if (i < f->start_band || i >= f->end_band) {
59 172932 block->energy[i] = 0.0;
60 172932 continue;
61 }
62
63 850713 available = f->framebits - opus_rc_tell(rc);
64
2/2
✓ Branch 0 taken 846877 times.
✓ Branch 1 taken 3836 times.
 850713 if (available >= 15) {
65 /* decode using a Laplace distribution */
66 846877 int k = FFMIN(i, 20) << 1;
67 846877 value = ff_opus_rc_dec_laplace(rc, model[k] << 7, model[k+1] << 6);
68
2/2
✓ Branch 0 taken 113 times.
✓ Branch 1 taken 3723 times.
 3836 } else if (available >= 2) {
69 113 int x = ff_opus_rc_dec_cdf(rc, ff_celt_model_energy_small);
70 113 value = (x>>1) ^ -(x&1);
71
2/2
✓ Branch 0 taken 3 times.
✓ Branch 1 taken 3720 times.
 3723 } else if (available >= 1) {
72 3 value = -(float)ff_opus_rc_dec_log(rc, 1);
73 3720 } else value = -1;
74
75
2/2
✓ Branch 0 taken 119050 times.
✓ Branch 1 taken 731663 times.
 850713 block->energy[i] = FFMAX(-9.0f, block->energy[i]) * alpha + prev[j] + value;
76 850713 prev[j] += beta * value;
77 }
78 }
79 29947 }
80
81 29947 static void celt_decode_fine_energy(CeltFrame *f, OpusRangeCoder *rc)
82 {
83 int i;
84
2/2
✓ Branch 0 taken 508634 times.
✓ Branch 1 taken 29947 times.
 538581 for (i = f->start_band; i < f->end_band; i++) {
85 int j;
86
2/2
✓ Branch 0 taken 95389 times.
✓ Branch 1 taken 413245 times.
 508634 if (!f->fine_bits[i])
87 95389 continue;
88
89
2/2
✓ Branch 0 taken 682217 times.
✓ Branch 1 taken 413245 times.
 1095462 for (j = 0; j < f->channels; j++) {
90 682217 CeltBlock *block = &f->block[j];
91 int q2;
92 float offset;
93 682217 q2 = ff_opus_rc_get_raw(rc, f->fine_bits[i]);
94 682217 offset = (q2 + 0.5f) * (1 << (14 - f->fine_bits[i])) / 16384.0f - 0.5f;
95 682217 block->energy[i] += offset;
96 }
97 }
98 29947 }
99
100 29947 static void celt_decode_final_energy(CeltFrame *f, OpusRangeCoder *rc)
101 {
102 int priority, i, j;
103 29947 int bits_left = f->framebits - opus_rc_tell(rc);
104
105
2/2
✓ Branch 0 taken 59894 times.
✓ Branch 1 taken 29947 times.
 89841 for (priority = 0; priority < 2; priority++) {
106
4/4
✓ Branch 0 taken 156577 times.
✓ Branch 1 taken 6226 times.
✓ Branch 2 taken 102909 times.
✓ Branch 3 taken 53668 times.
 162803 for (i = f->start_band; i < f->end_band && bits_left >= f->channels; i++) {
107
4/4
✓ Branch 0 taken 55115 times.
✓ Branch 1 taken 47794 times.
✓ Branch 2 taken 17685 times.
✓ Branch 3 taken 37430 times.
 102909 if (f->fine_priority[i] != priority || f->fine_bits[i] >= CELT_MAX_FINE_BITS)
108 65479 continue;
109
110
2/2
✓ Branch 0 taken 58976 times.
✓ Branch 1 taken 37430 times.
 96406 for (j = 0; j < f->channels; j++) {
111 int q2;
112 float offset;
113 58976 q2 = ff_opus_rc_get_raw(rc, 1);
114 58976 offset = (q2 - 0.5f) * (1 << (14 - f->fine_bits[i] - 1)) / 16384.0f;
115 58976 f->block[j].energy[i] += offset;
116 58976 bits_left--;
117 }
118 }
119 }
120 29947 }
121
122 29947 static void celt_decode_tf_changes(CeltFrame *f, OpusRangeCoder *rc)
123 {
124 29947 int i, diff = 0, tf_select = 0, tf_changed = 0, tf_select_bit;
125
2/2
✓ Branch 0 taken 4044 times.
✓ Branch 1 taken 25903 times.
 29947 int consumed, bits = f->transient ? 2 : 4;
126
127 29947 consumed = opus_rc_tell(rc);
128
4/4
✓ Branch 0 taken 16241 times.
✓ Branch 1 taken 13706 times.
✓ Branch 2 taken 16144 times.
✓ Branch 3 taken 97 times.
 29947 tf_select_bit = (f->size != 0 && consumed+bits+1 <= f->framebits);
129
130
2/2
✓ Branch 0 taken 508634 times.
✓ Branch 1 taken 29947 times.
 538581 for (i = f->start_band; i < f->end_band; i++) {
131
2/2
✓ Branch 0 taken 506137 times.
✓ Branch 1 taken 2497 times.
 508634 if (consumed+bits+tf_select_bit <= f->framebits) {
132 506137 diff ^= ff_opus_rc_dec_log(rc, bits);
133 506137 consumed = opus_rc_tell(rc);
134 506137 tf_changed |= diff;
135 }
136 508634 f->tf_change[i] = diff;
137
2/2
✓ Branch 0 taken 60533 times.
✓ Branch 1 taken 448101 times.
 508634 bits = f->transient ? 4 : 5;
138 }
139
140
2/2
✓ Branch 0 taken 16144 times.
✓ Branch 1 taken 13803 times.
 29947 if (tf_select_bit && ff_celt_tf_select[f->size][f->transient][0][tf_changed] !=
141
2/2
✓ Branch 0 taken 8124 times.
✓ Branch 1 taken 8020 times.
 16144 ff_celt_tf_select[f->size][f->transient][1][tf_changed])
142 8124 tf_select = ff_opus_rc_dec_log(rc, 1);
143
144
2/2
✓ Branch 0 taken 508634 times.
✓ Branch 1 taken 29947 times.
 538581 for (i = f->start_band; i < f->end_band; i++) {
145 508634 f->tf_change[i] = ff_celt_tf_select[f->size][f->transient][tf_select][f->tf_change[i]];
146 }
147 29947 }
148
149 48745 static void celt_denormalize(CeltFrame *f, CeltBlock *block, float *data)
150 {
151 int i, j;
152
153
2/2
✓ Branch 0 taken 850713 times.
✓ Branch 1 taken 48745 times.
 899458 for (i = f->start_band; i < f->end_band; i++) {
154 850713 float *dst = data + (ff_celt_freq_bands[i] << f->size);
155 850713 float log_norm = block->energy[i] + ff_celt_mean_energy[i];
156
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 850713 times.
 850713 float norm = exp2f(FFMIN(log_norm, 32.0f));
157
158
2/2
✓ Branch 0 taken 12349060 times.
✓ Branch 1 taken 850713 times.
 13199773 for (j = 0; j < ff_celt_freq_range[i] << f->size; j++)
159 12349060 dst[j] *= norm;
160 }
161 48745 }
162
163 89302 static void celt_postfilter_apply_transition(CeltBlock *block, float *data)
164 {
165 89302 const int T0 = block->pf_period_old;
166 89302 const int T1 = block->pf_period;
167
168 float g00, g01, g02;
169 float g10, g11, g12;
170
171 float x0, x1, x2, x3, x4;
172
173 int i;
174
175
2/2
✓ Branch 0 taken 41858 times.
✓ Branch 1 taken 47444 times.
 89302 if (block->pf_gains[0] == 0.0 &&
176
2/2
✓ Branch 0 taken 37678 times.
✓ Branch 1 taken 4180 times.
 41858 block->pf_gains_old[0] == 0.0)
177 37678 return;
178
179 51624 g00 = block->pf_gains_old[0];
180 51624 g01 = block->pf_gains_old[1];
181 51624 g02 = block->pf_gains_old[2];
182 51624 g10 = block->pf_gains[0];
183 51624 g11 = block->pf_gains[1];
184 51624 g12 = block->pf_gains[2];
185
186 51624 x1 = data[-T1 + 1];
187 51624 x2 = data[-T1];
188 51624 x3 = data[-T1 - 1];
189 51624 x4 = data[-T1 - 2];
190
191
2/2
✓ Branch 0 taken 6194880 times.
✓ Branch 1 taken 51624 times.
 6246504 for (i = 0; i < CELT_OVERLAP; i++) {
192 6194880 float w = ff_celt_window2[i];
193 6194880 x0 = data[i - T1 + 2];
194
195 6194880 data[i] += (1.0 - w) * g00 * data[i - T0] +
196 6194880 (1.0 - w) * g01 * (data[i - T0 - 1] + data[i - T0 + 1]) +
197 6194880 (1.0 - w) * g02 * (data[i - T0 - 2] + data[i - T0 + 2]) +
198 6194880 w * g10 * x2 +
199 6194880 w * g11 * (x1 + x3) +
200 6194880 w * g12 * (x0 + x4);
201 6194880 x4 = x3;
202 6194880 x3 = x2;
203 6194880 x2 = x1;
204 6194880 x1 = x0;
205 }
206 }
207
208 56826 static void celt_postfilter(CeltFrame *f, CeltBlock *block)
209 {
210 56826 int len = f->blocksize * f->blocks;
211 56826 const int filter_len = len - 2 * CELT_OVERLAP;
212
213 56826 celt_postfilter_apply_transition(block, block->buf + 1024);
214
215 56826 block->pf_period_old = block->pf_period;
216 56826 memcpy(block->pf_gains_old, block->pf_gains, sizeof(block->pf_gains));
217
218 56826 block->pf_period = block->pf_period_new;
219 56826 memcpy(block->pf_gains, block->pf_gains_new, sizeof(block->pf_gains));
220
221
2/2
✓ Branch 0 taken 32476 times.
✓ Branch 1 taken 24350 times.
 56826 if (len > CELT_OVERLAP) {
222 32476 celt_postfilter_apply_transition(block, block->buf + 1024 + CELT_OVERLAP);
223
224
4/4
✓ Branch 0 taken 16740 times.
✓ Branch 1 taken 15736 times.
✓ Branch 2 taken 10126 times.
✓ Branch 3 taken 6614 times.
 32476 if (block->pf_gains[0] > FLT_EPSILON && filter_len > 0)
225 10126 f->opusdsp.postfilter(block->buf + 1024 + 2 * CELT_OVERLAP,
226 10126 block->pf_period, block->pf_gains,
227 filter_len);
228
229 32476 block->pf_period_old = block->pf_period;
230 32476 memcpy(block->pf_gains_old, block->pf_gains, sizeof(block->pf_gains));
231 }
232
233 56826 memmove(block->buf, block->buf + len, (1024 + CELT_OVERLAP / 2) * sizeof(float));
234 56826 }
235
236 29947 static int parse_postfilter(CeltFrame *f, OpusRangeCoder *rc, int consumed)
237 {
238 int i;
239
240 29947 memset(f->block[0].pf_gains_new, 0, sizeof(f->block[0].pf_gains_new));
241 29947 memset(f->block[1].pf_gains_new, 0, sizeof(f->block[1].pf_gains_new));
242
243
4/4
✓ Branch 0 taken 24958 times.
✓ Branch 1 taken 4989 times.
✓ Branch 2 taken 24832 times.
✓ Branch 3 taken 126 times.
 29947 if (f->start_band == 0 && consumed + 16 <= f->framebits) {
244 24832 int has_postfilter = ff_opus_rc_dec_log(rc, 1);
245
2/2
✓ Branch 0 taken 15874 times.
✓ Branch 1 taken 8958 times.
 24832 if (has_postfilter) {
246 float gain;
247 int tapset, octave, period;
248
249 15874 octave = ff_opus_rc_dec_uint(rc, 6);
250 15874 period = (16 << octave) + ff_opus_rc_get_raw(rc, 4 + octave) - 1;
251 15874 gain = 0.09375f * (ff_opus_rc_get_raw(rc, 3) + 1);
252 15874 tapset = (opus_rc_tell(rc) + 2 <= f->framebits) ?
253
1/2
✓ Branch 0 taken 15874 times.
✗ Branch 1 not taken.
 15874 ff_opus_rc_dec_cdf(rc, ff_celt_model_tapset) : 0;
254
255
2/2
✓ Branch 0 taken 31748 times.
✓ Branch 1 taken 15874 times.
 47622 for (i = 0; i < 2; i++) {
256 31748 CeltBlock *block = &f->block[i];
257
258 31748 block->pf_period_new = FFMAX(period, CELT_POSTFILTER_MINPERIOD);
259 31748 block->pf_gains_new[0] = gain * ff_celt_postfilter_taps[tapset][0];
260 31748 block->pf_gains_new[1] = gain * ff_celt_postfilter_taps[tapset][1];
261 31748 block->pf_gains_new[2] = gain * ff_celt_postfilter_taps[tapset][2];
262 }
263 }
264
265 24832 consumed = opus_rc_tell(rc);
266 }
267
268 29947 return consumed;
269 }
270
271 2793 static void process_anticollapse(CeltFrame *f, CeltBlock *block, float *X)
272 {
273 int i, j, k;
274
275
2/2
✓ Branch 0 taken 35536 times.
✓ Branch 1 taken 2793 times.
 38329 for (i = f->start_band; i < f->end_band; i++) {
276 35536 int renormalize = 0;
277 float *xptr;
278 float prev[2];
279 float Ediff, r;
280 float thresh, sqrt_1;
281 int depth;
282
283 /* depth in 1/8 bits */
284 35536 depth = (1 + f->pulses[i]) / (ff_celt_freq_range[i] << f->size);
285 35536 thresh = exp2f(-1.0 - 0.125f * depth);
286 35536 sqrt_1 = 1.0f / sqrtf(ff_celt_freq_range[i] << f->size);
287
288 35536 xptr = X + (ff_celt_freq_bands[i] << f->size);
289
290 35536 prev[0] = block->prev_energy[0][i];
291 35536 prev[1] = block->prev_energy[1][i];
292
2/2
✓ Branch 0 taken 10086 times.
✓ Branch 1 taken 25450 times.
 35536 if (f->channels == 1) {
293 10086 CeltBlock *block1 = &f->block[1];
294
295
2/2
✓ Branch 0 taken 14 times.
✓ Branch 1 taken 10072 times.
 10086 prev[0] = FFMAX(prev[0], block1->prev_energy[0][i]);
296
2/2
✓ Branch 0 taken 137 times.
✓ Branch 1 taken 9949 times.
 10086 prev[1] = FFMAX(prev[1], block1->prev_energy[1][i]);
297 }
298
2/2
✓ Branch 0 taken 16490 times.
✓ Branch 1 taken 19046 times.
 35536 Ediff = block->energy[i] - FFMIN(prev[0], prev[1]);
299
2/2
✓ Branch 0 taken 2752 times.
✓ Branch 1 taken 32784 times.
 35536 Ediff = FFMAX(0, Ediff);
300
301 /* r needs to be multiplied by 2 or 2*sqrt(2) depending on LM because
302 short blocks don't have the same energy as long */
303 35536 r = exp2f(1 - Ediff);
304
2/2
✓ Branch 0 taken 23975 times.
✓ Branch 1 taken 11561 times.
 35536 if (f->size == 3)
305 23975 r *= M_SQRT2;
306
2/2
✓ Branch 0 taken 5841 times.
✓ Branch 1 taken 29695 times.
 35536 r = FFMIN(thresh, r) * sqrt_1;
307
2/2
✓ Branch 0 taken 238044 times.
✓ Branch 1 taken 35536 times.
 273580 for (k = 0; k < 1 << f->size; k++) {
308 /* Detect collapse */
309
2/2
✓ Branch 0 taken 20731 times.
✓ Branch 1 taken 217313 times.
 238044 if (!(block->collapse_masks[i] & 1 << k)) {
310 /* Fill with noise */
311
2/2
✓ Branch 0 taken 100329 times.
✓ Branch 1 taken 20731 times.
 121060 for (j = 0; j < ff_celt_freq_range[i]; j++)
312
2/2
✓ Branch 1 taken 50064 times.
✓ Branch 2 taken 50265 times.
 100329 xptr[(j << f->size) + k] = (celt_rng(f) & 0x8000) ? r : -r;
313 20731 renormalize = 1;
314 }
315 }
316
317 /* We just added some energy, so we need to renormalize */
318
2/2
✓ Branch 0 taken 8841 times.
✓ Branch 1 taken 26695 times.
 35536 if (renormalize)
319 8841 celt_renormalize_vector(xptr, ff_celt_freq_range[i] << f->size, 1.0f);
320 }
321 2793 }
322
323 29947 int ff_celt_decode_frame(CeltFrame *f, OpusRangeCoder *rc,
324 float **output, int channels, int frame_size,
325 int start_band, int end_band)
326 {
327 29947 int i, j, downmix = 0;
328 int consumed; // bits of entropy consumed thus far for this frame
329 AVTXContext *imdct;
330 av_tx_fn imdct_fn;
331
332
3/4
✓ Branch 0 taken 18798 times.
✓ Branch 1 taken 11149 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 18798 times.
 29947 if (channels != 1 && channels != 2) {
333 ✗ av_log(f->avctx, AV_LOG_ERROR, "Invalid number of coded channels: %d\n",
334 channels);
335 ✗ return AVERROR_INVALIDDATA;
336 }
337
3/6
✓ Branch 0 taken 29947 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 29947 times.
✗ Branch 3 not taken.
✗ Branch 4 not taken.
✓ Branch 5 taken 29947 times.
 29947 if (start_band < 0 || start_band > end_band || end_band > CELT_MAX_BANDS) {
338 ✗ av_log(f->avctx, AV_LOG_ERROR, "Invalid start/end band: %d %d\n",
339 start_band, end_band);
340 ✗ return AVERROR_INVALIDDATA;
341 }
342
343 29947 f->silence = 0;
344 29947 f->transient = 0;
345 29947 f->anticollapse = 0;
346 29947 f->flushed = 0;
347 29947 f->channels = channels;
348 29947 f->start_band = start_band;
349 29947 f->end_band = end_band;
350 29947 f->framebits = rc->rb.bytes * 8;
351
352 29947 f->size = av_log2(frame_size / CELT_SHORT_BLOCKSIZE);
353
1/2
✓ Branch 0 taken 29947 times.
✗ Branch 1 not taken.
 29947 if (f->size > CELT_MAX_LOG_BLOCKS ||
354
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 29947 times.
 29947 frame_size != CELT_SHORT_BLOCKSIZE * (1 << f->size)) {
355 ✗ av_log(f->avctx, AV_LOG_ERROR, "Invalid CELT frame size: %d\n",
356 frame_size);
357 ✗ return AVERROR_INVALIDDATA;
358 }
359
360
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 29947 times.
 29947 if (!f->output_channels)
361 ✗ f->output_channels = channels;
362
363
2/2
✓ Branch 0 taken 48745 times.
✓ Branch 1 taken 29947 times.
 78692 for (i = 0; i < f->channels; i++) {
364 48745 memset(f->block[i].coeffs, 0, sizeof(f->block[i].coeffs));
365 48745 memset(f->block[i].collapse_masks, 0, sizeof(f->block[i].collapse_masks));
366 }
367
368 29947 consumed = opus_rc_tell(rc);
369
370 /* obtain silence flag */
371
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 29947 times.
 29947 if (consumed >= f->framebits)
372 ✗ f->silence = 1;
373
2/2
✓ Branch 0 taken 24958 times.
✓ Branch 1 taken 4989 times.
 29947 else if (consumed == 1)
374 24958 f->silence = ff_opus_rc_dec_log(rc, 15);
375
376
377
2/2
✓ Branch 0 taken 126 times.
✓ Branch 1 taken 29821 times.
 29947 if (f->silence) {
378 126 consumed = f->framebits;
379 126 rc->total_bits += f->framebits - opus_rc_tell(rc);
380 }
381
382 /* obtain post-filter options */
383 29947 consumed = parse_postfilter(f, rc, consumed);
384
385 /* obtain transient flag */
386
4/4
✓ Branch 0 taken 16241 times.
✓ Branch 1 taken 13706 times.
✓ Branch 2 taken 16152 times.
✓ Branch 3 taken 89 times.
 29947 if (f->size != 0 && consumed+3 <= f->framebits)
387 16152 f->transient = ff_opus_rc_dec_log(rc, 3);
388
389
2/2
✓ Branch 0 taken 4044 times.
✓ Branch 1 taken 25903 times.
 29947 f->blocks = f->transient ? 1 << f->size : 1;
390 29947 f->blocksize = frame_size / f->blocks;
391
392
2/2
✓ Branch 0 taken 25903 times.
✓ Branch 1 taken 4044 times.
 29947 imdct = f->tx[f->transient ? 0 : f->size];
393
2/2
✓ Branch 0 taken 25903 times.
✓ Branch 1 taken 4044 times.
 29947 imdct_fn = f->tx_fn[f->transient ? 0 : f->size];
394
395
2/2
✓ Branch 0 taken 11149 times.
✓ Branch 1 taken 18798 times.
 29947 if (channels == 1) {
396
2/2
✓ Branch 0 taken 234129 times.
✓ Branch 1 taken 11149 times.
 245278 for (i = 0; i < CELT_MAX_BANDS; i++)
397
2/2
✓ Branch 0 taken 393 times.
✓ Branch 1 taken 233736 times.
 234129 f->block[0].energy[i] = FFMAX(f->block[0].energy[i], f->block[1].energy[i]);
398 }
399
400 29947 celt_decode_coarse_energy(f, rc);
401 29947 celt_decode_tf_changes (f, rc);
402 29947 ff_celt_bitalloc (f, rc, 0);
403 29947 celt_decode_fine_energy (f, rc);
404 29947 ff_celt_quant_bands (f, rc);
405
406
2/2
✓ Branch 0 taken 3158 times.
✓ Branch 1 taken 26789 times.
 29947 if (f->anticollapse_needed)
407 3158 f->anticollapse = ff_opus_rc_get_raw(rc, 1);
408
409 29947 celt_decode_final_energy(f, rc);
410
411 /* apply anti-collapse processing and denormalization to
412 * each coded channel */
413
2/2
✓ Branch 0 taken 48745 times.
✓ Branch 1 taken 29947 times.
 78692 for (i = 0; i < f->channels; i++) {
414 48745 CeltBlock *block = &f->block[i];
415
416
2/2
✓ Branch 0 taken 2793 times.
✓ Branch 1 taken 45952 times.
 48745 if (f->anticollapse)
417 2793 process_anticollapse(f, block, f->block[i].coeffs);
418
419 48745 celt_denormalize(f, block, f->block[i].coeffs);
420 }
421
422 /* stereo -> mono downmix */
423
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 29947 times.
 29947 if (f->output_channels < f->channels) {
424 ✗ f->dsp->vector_fmac_scalar(f->block[0].coeffs, f->block[1].coeffs, 1.0, FFALIGN(frame_size, 16));
425 ✗ downmix = 1;
426
2/2
✓ Branch 0 taken 8081 times.
✓ Branch 1 taken 21866 times.
 29947 } else if (f->output_channels > f->channels)
427 8081 memcpy(f->block[1].coeffs, f->block[0].coeffs, frame_size * sizeof(float));
428
429
2/2
✓ Branch 0 taken 126 times.
✓ Branch 1 taken 29821 times.
 29947 if (f->silence) {
430
2/2
✓ Branch 0 taken 252 times.
✓ Branch 1 taken 126 times.
 378 for (i = 0; i < 2; i++) {
431 252 CeltBlock *block = &f->block[i];
432
433
2/2
✓ Branch 0 taken 5292 times.
✓ Branch 1 taken 252 times.
 5544 for (j = 0; j < FF_ARRAY_ELEMS(block->energy); j++)
434 5292 block->energy[j] = CELT_ENERGY_SILENCE;
435 }
436 126 memset(f->block[0].coeffs, 0, sizeof(f->block[0].coeffs));
437 126 memset(f->block[1].coeffs, 0, sizeof(f->block[1].coeffs));
438 }
439
440 /* transform and output for each output channel */
441
2/2
✓ Branch 0 taken 56826 times.
✓ Branch 1 taken 29947 times.
 86773 for (i = 0; i < f->output_channels; i++) {
442 56826 CeltBlock *block = &f->block[i];
443
444 /* iMDCT and overlap-add */
445
2/2
✓ Branch 0 taken 93066 times.
✓ Branch 1 taken 56826 times.
 149892 for (j = 0; j < f->blocks; j++) {
446 93066 float *dst = block->buf + 1024 + j * f->blocksize;
447
448 93066 imdct_fn(imdct, dst + CELT_OVERLAP / 2, f->block[i].coeffs + j,
449 93066 sizeof(float)*f->blocks);
450 93066 f->dsp->vector_fmul_window(dst, dst, dst + CELT_OVERLAP / 2,
451 ff_celt_window, CELT_OVERLAP / 2);
452 }
453
454
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 56826 times.
 56826 if (downmix)
455 ✗ f->dsp->vector_fmul_scalar(&block->buf[1024], &block->buf[1024], 0.5f, frame_size);
456
457 /* postfilter */
458 56826 celt_postfilter(f, block);
459
460 /* deemphasis */
461 56826 block->emph_coeff = f->opusdsp.deemphasis(output[i],
462 56826 &block->buf[1024 - frame_size],
463 block->emph_coeff, frame_size);
464 }
465
466
2/2
✓ Branch 0 taken 11149 times.
✓ Branch 1 taken 18798 times.
 29947 if (channels == 1)
467 11149 memcpy(f->block[1].energy, f->block[0].energy, sizeof(f->block[0].energy));
468
469
2/2
✓ Branch 0 taken 59894 times.
✓ Branch 1 taken 29947 times.
 89841 for (i = 0; i < 2; i++ ) {
470 59894 CeltBlock *block = &f->block[i];
471
472
2/2
✓ Branch 0 taken 51806 times.
✓ Branch 1 taken 8088 times.
 59894 if (!f->transient) {
473 51806 memcpy(block->prev_energy[1], block->prev_energy[0], sizeof(block->prev_energy[0]));
474 51806 memcpy(block->prev_energy[0], block->energy, sizeof(block->prev_energy[0]));
475 } else {
476
2/2
✓ Branch 0 taken 169848 times.
✓ Branch 1 taken 8088 times.
 177936 for (j = 0; j < CELT_MAX_BANDS; j++)
477
2/2
✓ Branch 0 taken 19438 times.
✓ Branch 1 taken 150410 times.
 169848 block->prev_energy[0][j] = FFMIN(block->prev_energy[0][j], block->energy[j]);
478 }
479
480
2/2
✓ Branch 0 taken 169626 times.
✓ Branch 1 taken 59894 times.
 229520 for (j = 0; j < f->start_band; j++) {
481 169626 block->prev_energy[0][j] = CELT_ENERGY_SILENCE;
482 169626 block->energy[j] = 0.0;
483 }
484
2/2
✓ Branch 0 taken 70880 times.
✓ Branch 1 taken 59894 times.
 130774 for (j = f->end_band; j < CELT_MAX_BANDS; j++) {
485 70880 block->prev_energy[0][j] = CELT_ENERGY_SILENCE;
486 70880 block->energy[j] = 0.0;
487 }
488 }
489
490 29947 f->seed = rc->range;
491
492 29947 return 0;
493 }
494
495 4650 void ff_celt_flush(CeltFrame *f)
496 {
497 int i, j;
498
499
2/2
✓ Branch 0 taken 4541 times.
✓ Branch 1 taken 109 times.
 4650 if (f->flushed)
500 4541 return;
501
502
2/2
✓ Branch 0 taken 218 times.
✓ Branch 1 taken 109 times.
 327 for (i = 0; i < 2; i++) {
503 218 CeltBlock *block = &f->block[i];
504
505
2/2
✓ Branch 0 taken 4578 times.
✓ Branch 1 taken 218 times.
 4796 for (j = 0; j < CELT_MAX_BANDS; j++)
506 4578 block->prev_energy[0][j] = block->prev_energy[1][j] = CELT_ENERGY_SILENCE;
507
508 218 memset(block->energy, 0, sizeof(block->energy));
509 218 memset(block->buf, 0, sizeof(block->buf));
510
511 218 memset(block->pf_gains, 0, sizeof(block->pf_gains));
512 218 memset(block->pf_gains_old, 0, sizeof(block->pf_gains_old));
513 218 memset(block->pf_gains_new, 0, sizeof(block->pf_gains_new));
514
515 /* libopus uses CELT_EMPH_COEFF on init, but 0 is better since there's
516 * a lesser discontinuity when seeking.
517 * The deemphasis functions differ from libopus in that they require
518 * an initial state divided by the coefficient. */
519 218 block->emph_coeff = 0.0f / CELT_EMPH_COEFF;
520 }
521 109 f->seed = 0;
522
523 109 f->flushed = 1;
524 }
525
526 86 void ff_celt_free(CeltFrame **f)
527 {
528 86 CeltFrame *frm = *f;
529 int i;
530
531
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 86 times.
 86 if (!frm)
532 ✗ return;
533
534
2/2
✓ Branch 0 taken 344 times.
✓ Branch 1 taken 86 times.
 430 for (i = 0; i < FF_ARRAY_ELEMS(frm->tx); i++)
535 344 av_tx_uninit(&frm->tx[i]);
536
537 86 ff_celt_pvq_uninit(&frm->pvq);
538
539 86 av_freep(&frm->dsp);
540 86 av_freep(f);
541 }
542
543 86 int ff_celt_init(AVCodecContext *avctx, CeltFrame **f, int output_channels,
544 int apply_phase_inv)
545 {
546 CeltFrame *frm;
547 int i, ret;
548
549
3/4
✓ Branch 0 taken 57 times.
✓ Branch 1 taken 29 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 57 times.
 86 if (output_channels != 1 && output_channels != 2) {
550 ✗ av_log(avctx, AV_LOG_ERROR, "Invalid number of output channels: %d\n",
551 output_channels);
552 ✗ return AVERROR(EINVAL);
553 }
554
555 86 frm = av_mallocz(sizeof(*frm));
556
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 86 times.
 86 if (!frm)
557 ✗ return AVERROR(ENOMEM);
558
559 86 frm->avctx = avctx;
560 86 frm->output_channels = output_channels;
561 86 frm->apply_phase_inv = apply_phase_inv;
562
563
2/2
✓ Branch 0 taken 344 times.
✓ Branch 1 taken 86 times.
 430 for (i = 0; i < FF_ARRAY_ELEMS(frm->tx); i++) {
564 344 const float scale = -1.0f/32768;
565
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 344 times.
 344 if ((ret = av_tx_init(&frm->tx[i], &frm->tx_fn[i], AV_TX_FLOAT_MDCT, 1, 15 << (i + 3), &scale, 0)) < 0)
566 ✗ goto fail;
567 }
568
569
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 86 times.
 86 if ((ret = ff_celt_pvq_init(&frm->pvq, 0)) < 0)
570 ✗ goto fail;
571
572 86 frm->dsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT);
573
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 86 times.
 86 if (!frm->dsp) {
574 ✗ ret = AVERROR(ENOMEM);
575 ✗ goto fail;
576 }
577
578 86 ff_opus_dsp_init(&frm->opusdsp);
579 86 ff_celt_flush(frm);
580
581 86 *f = frm;
582
583 86 return 0;
584 ✗ fail:
585 ✗ ff_celt_free(&frm);
586 ✗ return ret;
587 }
588