FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/aacenc.c
Date: 2025-10-30 16:00:47
Exec Total Coverage
Lines: 510 592 86.1%
Functions: 24 26 92.3%
Branches: 318 408 77.9%
Line Branch Exec Source
1 /*
2 * AAC encoder
3 * Copyright (C) 2008 Konstantin Shishkov
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file
24 * AAC encoder
25 */
26
27 /***********************************
28 * TODOs:
29 * add sane pulse detection
30 ***********************************/
31 #include <float.h>
32
33 #include "libavutil/channel_layout.h"
34 #include "libavutil/libm.h"
35 #include "libavutil/float_dsp.h"
36 #include "libavutil/mem.h"
37 #include "libavutil/opt.h"
38 #include "avcodec.h"
39 #include "codec_internal.h"
40 #include "encode.h"
41 #include "put_bits.h"
42 #include "mpeg4audio.h"
43 #include "sinewin.h"
44 #include "profiles.h"
45 #include "version.h"
46
47 #include "aac.h"
48 #include "aactab.h"
49 #include "aacenc.h"
50 #include "aacenctab.h"
51 #include "aacenc_utils.h"
52
53 #include "psymodel.h"
54
55 /**
56 * List of PCE (Program Configuration Element) for the channel layouts listed
57 * in channel_layout.h
58 *
59 * For those wishing in the future to add other layouts:
60 *
61 * - num_ele: number of elements in each group of front, side, back, lfe channels
62 * (an element is of type SCE (single channel), CPE (channel pair) for
63 * the first 3 groups; and is LFE for LFE group).
64 *
65 * - pairing: 0 for an SCE element or 1 for a CPE; does not apply to LFE group
66 *
67 * - index: there are three independent indices for SCE, CPE and LFE;
68 * they are incremented irrespective of the group to which the element belongs;
69 * they are not reset when going from one group to another
70 *
71 * Example: for 7.0 channel layout,
72 * .pairing = { { 1, 0 }, { 1 }, { 1 }, }, (3 CPE and 1 SCE in front group)
73 * .index = { { 0, 0 }, { 1 }, { 2 }, },
74 * (index is 0 for the single SCE but goes from 0 to 2 for the CPEs)
75 *
76 * The index order impacts the channel ordering. But is otherwise arbitrary
77 * (the sequence could have been 2, 0, 1 instead of 0, 1, 2).
78 *
79 * Spec allows for discontinuous indices, e.g. if one has a total of two SCE,
80 * SCE.0 SCE.15 is OK per spec; BUT it won't be decoded by our AAC decoder
81 * which at this time requires that indices fully cover some range starting
82 * from 0 (SCE.1 SCE.0 is OK but not SCE.0 SCE.15).
83 *
84 * - config_map: total number of elements and their types. Beware, the way the
85 * types are ordered impacts the final channel ordering.
86 *
87 * - reorder_map: reorders the channels.
88 *
89 */
90 static const AACPCEInfo aac_pce_configs[] = {
91 {
92 .layout = AV_CHANNEL_LAYOUT_MONO,
93 .num_ele = { 1, 0, 0, 0 },
94 .pairing = { { 0 }, },
95 .index = { { 0 }, },
96 .config_map = { 1, TYPE_SCE, },
97 .reorder_map = { 0 },
98 },
99 {
100 .layout = AV_CHANNEL_LAYOUT_STEREO,
101 .num_ele = { 1, 0, 0, 0 },
102 .pairing = { { 1 }, },
103 .index = { { 0 }, },
104 .config_map = { 1, TYPE_CPE, },
105 .reorder_map = { 0, 1 },
106 },
107 {
108 .layout = AV_CHANNEL_LAYOUT_2POINT1,
109 .num_ele = { 1, 0, 0, 1 },
110 .pairing = { { 1 }, },
111 .index = { { 0 },{ 0 },{ 0 },{ 0 } },
112 .config_map = { 2, TYPE_CPE, TYPE_LFE },
113 .reorder_map = { 0, 1, 2 },
114 },
115 {
116 .layout = AV_CHANNEL_LAYOUT_2_1,
117 .num_ele = { 1, 0, 1, 0 },
118 .pairing = { { 1 },{ 0 },{ 0 } },
119 .index = { { 0 },{ 0 },{ 0 }, },
120 .config_map = { 2, TYPE_CPE, TYPE_SCE },
121 .reorder_map = { 0, 1, 2 },
122 },
123 {
124 .layout = AV_CHANNEL_LAYOUT_SURROUND,
125 .num_ele = { 2, 0, 0, 0 },
126 .pairing = { { 1, 0 }, },
127 .index = { { 0, 0 }, },
128 .config_map = { 2, TYPE_CPE, TYPE_SCE, },
129 .reorder_map = { 0, 1, 2 },
130 },
131 {
132 .layout = AV_CHANNEL_LAYOUT_3POINT1,
133 .num_ele = { 2, 0, 0, 1 },
134 .pairing = { { 1, 0 }, },
135 .index = { { 0, 0 }, { 0 }, { 0 }, { 0 }, },
136 .config_map = { 3, TYPE_CPE, TYPE_SCE, TYPE_LFE },
137 .reorder_map = { 0, 1, 2, 3 },
138 },
139 {
140 .layout = AV_CHANNEL_LAYOUT_4POINT0,
141 .num_ele = { 2, 0, 1, 0 },
142 .pairing = { { 1, 0 }, { 0 }, { 0 }, },
143 .index = { { 0, 0 }, { 0 }, { 1 } },
144 .config_map = { 3, TYPE_CPE, TYPE_SCE, TYPE_SCE },
145 .reorder_map = { 0, 1, 2, 3 },
146 },
147 {
148 .layout = AV_CHANNEL_LAYOUT_4POINT1,
149 .num_ele = { 2, 1, 1, 0 },
150 .pairing = { { 1, 0 }, { 0 }, { 0 }, },
151 .index = { { 0, 0 }, { 1 }, { 2 }, { 0 } },
152 .config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_SCE },
153 .reorder_map = { 0, 1, 2, 3, 4 },
154 },
155 {
156 .layout = AV_CHANNEL_LAYOUT_2_2,
157 .num_ele = { 1, 1, 0, 0 },
158 .pairing = { { 1 }, { 1 }, },
159 .index = { { 0 }, { 1 }, },
160 .config_map = { 2, TYPE_CPE, TYPE_CPE },
161 .reorder_map = { 0, 1, 2, 3 },
162 },
163 {
164 .layout = AV_CHANNEL_LAYOUT_QUAD,
165 .num_ele = { 1, 0, 1, 0 },
166 .pairing = { { 1 }, { 0 }, { 1 }, },
167 .index = { { 0 }, { 0 }, { 1 } },
168 .config_map = { 2, TYPE_CPE, TYPE_CPE },
169 .reorder_map = { 0, 1, 2, 3 },
170 },
171 {
172 .layout = AV_CHANNEL_LAYOUT_5POINT0,
173 .num_ele = { 2, 1, 0, 0 },
174 .pairing = { { 1, 0 }, { 1 }, },
175 .index = { { 0, 0 }, { 1 } },
176 .config_map = { 3, TYPE_CPE, TYPE_SCE, TYPE_CPE },
177 .reorder_map = { 0, 1, 2, 3, 4 },
178 },
179 {
180 .layout = AV_CHANNEL_LAYOUT_5POINT1,
181 .num_ele = { 2, 1, 1, 0 },
182 .pairing = { { 1, 0 }, { 0 }, { 1 }, },
183 .index = { { 0, 0 }, { 1 }, { 1 } },
184 .config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE },
185 .reorder_map = { 0, 1, 2, 3, 4, 5 },
186 },
187 {
188 .layout = AV_CHANNEL_LAYOUT_5POINT0_BACK,
189 .num_ele = { 2, 0, 1, 0 },
190 .pairing = { { 1, 0 }, { 0 }, { 1 } },
191 .index = { { 0, 0 }, { 0 }, { 1 } },
192 .config_map = { 3, TYPE_CPE, TYPE_SCE, TYPE_CPE },
193 .reorder_map = { 0, 1, 2, 3, 4 },
194 },
195 {
196 .layout = AV_CHANNEL_LAYOUT_5POINT1_BACK,
197 .num_ele = { 2, 1, 1, 0 },
198 .pairing = { { 1, 0 }, { 0 }, { 1 }, },
199 .index = { { 0, 0 }, { 1 }, { 1 } },
200 .config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE },
201 .reorder_map = { 0, 1, 2, 3, 4, 5 },
202 },
203 {
204 .layout = AV_CHANNEL_LAYOUT_6POINT0,
205 .num_ele = { 2, 1, 1, 0 },
206 .pairing = { { 1, 0 }, { 1 }, { 0 }, },
207 .index = { { 0, 0 }, { 1 }, { 1 } },
208 .config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
209 .reorder_map = { 0, 1, 2, 3, 4, 5 },
210 },
211 {
212 .layout = AV_CHANNEL_LAYOUT_6POINT0_FRONT,
213 .num_ele = { 2, 1, 0, 0 },
214 .pairing = { { 1, 1 }, { 1 } },
215 .index = { { 1, 0 }, { 2 }, },
216 .config_map = { 3, TYPE_CPE, TYPE_CPE, TYPE_CPE, },
217 .reorder_map = { 0, 1, 2, 3, 4, 5 },
218 },
219 {
220 .layout = AV_CHANNEL_LAYOUT_HEXAGONAL,
221 .num_ele = { 2, 0, 2, 0 },
222 .pairing = { { 1, 0 },{ 0 },{ 1, 0 }, },
223 .index = { { 0, 0 },{ 0 },{ 1, 1 } },
224 .config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE, },
225 .reorder_map = { 0, 1, 2, 3, 4, 5 },
226 },
227 {
228 .layout = AV_CHANNEL_LAYOUT_6POINT1,
229 .num_ele = { 2, 1, 2, 0 },
230 .pairing = { { 1, 0 },{ 0 },{ 1, 0 }, },
231 .index = { { 0, 0 },{ 1 },{ 1, 2 } },
232 .config_map = { 5, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
233 .reorder_map = { 0, 1, 2, 3, 4, 5, 6 },
234 },
235 {
236 .layout = AV_CHANNEL_LAYOUT_6POINT1_BACK,
237 .num_ele = { 2, 1, 2, 0 },
238 .pairing = { { 1, 0 }, { 0 }, { 1, 0 }, },
239 .index = { { 0, 0 }, { 1 }, { 1, 2 } },
240 .config_map = { 5, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
241 .reorder_map = { 0, 1, 2, 3, 4, 5, 6 },
242 },
243 {
244 .layout = AV_CHANNEL_LAYOUT_6POINT1_FRONT,
245 .num_ele = { 2, 1, 2, 0 },
246 .pairing = { { 1, 0 }, { 0 }, { 1, 0 }, },
247 .index = { { 0, 0 }, { 1 }, { 1, 2 } },
248 .config_map = { 5, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
249 .reorder_map = { 0, 1, 2, 3, 4, 5, 6 },
250 },
251 {
252 .layout = AV_CHANNEL_LAYOUT_7POINT0,
253 .num_ele = { 2, 1, 1, 0 },
254 .pairing = { { 1, 0 }, { 1 }, { 1 }, },
255 .index = { { 0, 0 }, { 1 }, { 2 }, },
256 .config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_CPE },
257 .reorder_map = { 0, 1, 2, 3, 4, 5, 6 },
258 },
259 {
260 .layout = AV_CHANNEL_LAYOUT_7POINT0_FRONT,
261 .num_ele = { 2, 1, 1, 0 },
262 .pairing = { { 1, 0 }, { 1 }, { 1 }, },
263 .index = { { 0, 0 }, { 1 }, { 2 }, },
264 .config_map = { 4, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_CPE },
265 .reorder_map = { 0, 1, 2, 3, 4, 5, 6 },
266 },
267 {
268 .layout = AV_CHANNEL_LAYOUT_7POINT1,
269 .num_ele = { 2, 1, 2, 0 },
270 .pairing = { { 1, 0 }, { 0 }, { 1, 1 }, },
271 .index = { { 0, 0 }, { 1 }, { 1, 2 }, { 0 } },
272 .config_map = { 5, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE, TYPE_CPE },
273 .reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7 },
274 },
275 {
276 .layout = AV_CHANNEL_LAYOUT_7POINT1_WIDE,
277 .num_ele = { 2, 1, 2, 0 },
278 .pairing = { { 1, 0 }, { 0 },{ 1, 1 }, },
279 .index = { { 0, 0 }, { 1 }, { 1, 2 }, { 0 } },
280 .config_map = { 5, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE, TYPE_CPE },
281 .reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7 },
282 },
283 {
284 .layout = AV_CHANNEL_LAYOUT_7POINT1_WIDE_BACK,
285 .num_ele = { 2, 1, 2, 0 },
286 .pairing = { { 1, 0 }, { 0 }, { 1, 1 }, },
287 .index = { { 0, 0 }, { 1 }, { 1, 2 }, { 0 } },
288 .config_map = { 5, TYPE_CPE, TYPE_SCE, TYPE_SCE, TYPE_CPE, TYPE_CPE },
289 .reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7 },
290 },
291 {
292 .layout = AV_CHANNEL_LAYOUT_OCTAGONAL,
293 .num_ele = { 2, 1, 2, 0 },
294 .pairing = { { 1, 0 }, { 1 }, { 1, 0 }, },
295 .index = { { 0, 0 }, { 1 }, { 2, 1 } },
296 .config_map = { 5, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_CPE, TYPE_SCE },
297 .reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7 },
298 },
299 { /* Meant for order 2/mixed ambisonics */
300 .layout = { .order = AV_CHANNEL_ORDER_NATIVE, .nb_channels = 9,
301 .u.mask = AV_CH_LAYOUT_OCTAGONAL | AV_CH_TOP_CENTER },
302 .num_ele = { 2, 2, 2, 0 },
303 .pairing = { { 1, 0 }, { 1, 0 }, { 1, 0 }, },
304 .index = { { 0, 0 }, { 1, 1 }, { 2, 2 } },
305 .config_map = { 6, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
306 .reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7, 8 },
307 },
308 { /* Meant for order 2/mixed ambisonics */
309 .layout = { .order = AV_CHANNEL_ORDER_NATIVE, .nb_channels = 10,
310 .u.mask = AV_CH_LAYOUT_6POINT0_FRONT | AV_CH_BACK_CENTER |
311 AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT | AV_CH_TOP_CENTER },
312 .num_ele = { 2, 2, 2, 0 },
313 .pairing = { { 1, 1 }, { 1, 0 }, { 1, 0 }, },
314 .index = { { 0, 1 }, { 2, 0 }, { 3, 1 } },
315 .config_map = { 6, TYPE_CPE, TYPE_CPE, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
316 .reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
317 },
318 {
319 .layout = AV_CHANNEL_LAYOUT_HEXADECAGONAL,
320 .num_ele = { 4, 2, 4, 0 },
321 .pairing = { { 1, 0, 1, 0 }, { 1, 1 }, { 1, 0, 1, 0 }, },
322 .index = { { 0, 0, 1, 1 }, { 2, 3 }, { 4, 2, 5, 3 } },
323 .config_map = { 10, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_CPE, TYPE_CPE, TYPE_SCE, TYPE_CPE, TYPE_SCE },
324 .reorder_map = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
325 },
326 };
327
328 ✗ static void put_pce(PutBitContext *pb, AVCodecContext *avctx)
329 {
330 int i, j;
331 ✗ AACEncContext *s = avctx->priv_data;
332 ✗ AACPCEInfo *pce = &s->pce;
333 ✗ const int bitexact = avctx->flags & AV_CODEC_FLAG_BITEXACT;
334 ✗ const char *aux_data = bitexact ? "Lavc" : LIBAVCODEC_IDENT;
335
336 ✗ put_bits(pb, 4, 0);
337
338 ✗ put_bits(pb, 2, avctx->profile);
339 ✗ put_bits(pb, 4, s->samplerate_index);
340
341 ✗ put_bits(pb, 4, pce->num_ele[0]); /* Front */
342 ✗ put_bits(pb, 4, pce->num_ele[1]); /* Side */
343 ✗ put_bits(pb, 4, pce->num_ele[2]); /* Back */
344 ✗ put_bits(pb, 2, pce->num_ele[3]); /* LFE */
345 ✗ put_bits(pb, 3, 0); /* Assoc data */
346 ✗ put_bits(pb, 4, 0); /* CCs */
347
348 ✗ put_bits(pb, 1, 0); /* Stereo mixdown */
349 ✗ put_bits(pb, 1, 0); /* Mono mixdown */
350 ✗ put_bits(pb, 1, 0); /* Something else */
351
352 ✗ for (i = 0; i < 4; i++) {
353 ✗ for (j = 0; j < pce->num_ele[i]; j++) {
354 ✗ if (i < 3)
355 ✗ put_bits(pb, 1, pce->pairing[i][j]);
356 ✗ put_bits(pb, 4, pce->index[i][j]);
357 }
358 }
359
360 ✗ align_put_bits(pb);
361 ✗ put_bits(pb, 8, strlen(aux_data));
362 ✗ ff_put_string(pb, aux_data, 0);
363 ✗ }
364
365 /**
366 * Make AAC audio config object.
367 * @see 1.6.2.1 "Syntax - AudioSpecificConfig"
368 */
369 10 static int put_audio_specific_config(AVCodecContext *avctx)
370 {
371 PutBitContext pb;
372 10 AACEncContext *s = avctx->priv_data;
373 10 int channels = (!s->needs_pce)*(s->channels - (s->channels == 8 ? 1 : 0));
374 10 const int max_size = 32;
375
376 10 avctx->extradata = av_mallocz(max_size);
377
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 10 if (!avctx->extradata)
378 ✗ return AVERROR(ENOMEM);
379
380 10 init_put_bits(&pb, avctx->extradata, max_size);
381 10 put_bits(&pb, 5, s->profile+1); //profile
382 10 put_bits(&pb, 4, s->samplerate_index); //sample rate index
383 10 put_bits(&pb, 4, channels);
384 //GASpecificConfig
385 10 put_bits(&pb, 1, 0); //frame length - 1024 samples
386 10 put_bits(&pb, 1, 0); //does not depend on core coder
387 10 put_bits(&pb, 1, 0); //is not extension
388
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 10 if (s->needs_pce)
389 ✗ put_pce(&pb, avctx);
390
391 //Explicitly Mark SBR absent
392 10 put_bits(&pb, 11, 0x2b7); //sync extension
393 10 put_bits(&pb, 5, AOT_SBR);
394 10 put_bits(&pb, 1, 0);
395 10 flush_put_bits(&pb);
396 10 avctx->extradata_size = put_bytes_output(&pb);
397
398 10 return 0;
399 }
400
401 9313 void ff_quantize_band_cost_cache_init(struct AACEncContext *s)
402 {
403 9313 ++s->quantize_band_cost_cache_generation;
404
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 9313 if (s->quantize_band_cost_cache_generation == 0) {
405 ✗ memset(s->quantize_band_cost_cache, 0, sizeof(s->quantize_band_cost_cache));
406 ✗ s->quantize_band_cost_cache_generation = 1;
407 }
408 9313 }
409
410 #define WINDOW_FUNC(type) \
411 static void apply_ ##type ##_window(AVFloatDSPContext *fdsp, \
412 SingleChannelElement *sce, \
413 const float *audio)
414
415 6122 WINDOW_FUNC(only_long)
416 {
417
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 6122 const float *lwindow = sce->ics.use_kb_window[0] ? ff_aac_kbd_long_1024 : ff_sine_1024;
418
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 6122 const float *pwindow = sce->ics.use_kb_window[1] ? ff_aac_kbd_long_1024 : ff_sine_1024;
419 6122 float *out = sce->ret_buf;
420
421 6122 fdsp->vector_fmul (out, audio, lwindow, 1024);
422 6122 fdsp->vector_fmul_reverse(out + 1024, audio + 1024, pwindow, 1024);
423 6122 }
424
425 105 WINDOW_FUNC(long_start)
426 {
427
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 105 const float *lwindow = sce->ics.use_kb_window[1] ? ff_aac_kbd_long_1024 : ff_sine_1024;
428
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 105 const float *swindow = sce->ics.use_kb_window[0] ? ff_aac_kbd_short_128 : ff_sine_128;
429 105 float *out = sce->ret_buf;
430
431 105 fdsp->vector_fmul(out, audio, lwindow, 1024);
432 105 memcpy(out + 1024, audio + 1024, sizeof(out[0]) * 448);
433 105 fdsp->vector_fmul_reverse(out + 1024 + 448, audio + 1024 + 448, swindow, 128);
434 105 memset(out + 1024 + 576, 0, sizeof(out[0]) * 448);
435 105 }
436
437 90 WINDOW_FUNC(long_stop)
438 {
439
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 90 const float *lwindow = sce->ics.use_kb_window[0] ? ff_aac_kbd_long_1024 : ff_sine_1024;
440
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 90 const float *swindow = sce->ics.use_kb_window[1] ? ff_aac_kbd_short_128 : ff_sine_128;
441 90 float *out = sce->ret_buf;
442
443 90 memset(out, 0, sizeof(out[0]) * 448);
444 90 fdsp->vector_fmul(out + 448, audio + 448, swindow, 128);
445 90 memcpy(out + 576, audio + 576, sizeof(out[0]) * 448);
446 90 fdsp->vector_fmul_reverse(out + 1024, audio + 1024, lwindow, 1024);
447 90 }
448
449 145 WINDOW_FUNC(eight_short)
450 {
451
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 145 const float *swindow = sce->ics.use_kb_window[0] ? ff_aac_kbd_short_128 : ff_sine_128;
452
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 145 const float *pwindow = sce->ics.use_kb_window[1] ? ff_aac_kbd_short_128 : ff_sine_128;
453 145 const float *in = audio + 448;
454 145 float *out = sce->ret_buf;
455 int w;
456
457
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 1305 for (w = 0; w < 8; w++) {
458
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 1160 fdsp->vector_fmul (out, in, w ? pwindow : swindow, 128);
459 1160 out += 128;
460 1160 in += 128;
461 1160 fdsp->vector_fmul_reverse(out, in, swindow, 128);
462 1160 out += 128;
463 }
464 145 }
465
466 static void (*const apply_window[4])(AVFloatDSPContext *fdsp,
467 SingleChannelElement *sce,
468 const float *audio) = {
469 [ONLY_LONG_SEQUENCE] = apply_only_long_window,
470 [LONG_START_SEQUENCE] = apply_long_start_window,
471 [EIGHT_SHORT_SEQUENCE] = apply_eight_short_window,
472 [LONG_STOP_SEQUENCE] = apply_long_stop_window
473 };
474
475 6462 static void apply_window_and_mdct(AACEncContext *s, SingleChannelElement *sce,
476 float *audio)
477 {
478 int i;
479 6462 float *output = sce->ret_buf;
480
481 6462 apply_window[sce->ics.window_sequence[0]](s->fdsp, sce, audio);
482
483
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 6462 if (sce->ics.window_sequence[0] != EIGHT_SHORT_SEQUENCE)
484 6317 s->mdct1024_fn(s->mdct1024, sce->coeffs, output, sizeof(float));
485 else
486
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 1305 for (i = 0; i < 1024; i += 128)
487 1160 s->mdct128_fn(s->mdct128, &sce->coeffs[i], output + i*2, sizeof(float));
488 6462 memcpy(audio, audio + 1024, sizeof(audio[0]) * 1024);
489 6462 memcpy(sce->pcoeffs, sce->coeffs, sizeof(sce->pcoeffs));
490 6462 }
491
492 /**
493 * Encode ics_info element.
494 * @see Table 4.6 (syntax of ics_info)
495 */
496 5250 static void put_ics_info(AACEncContext *s, IndividualChannelStream *info)
497 {
498 int w;
499
500 5250 put_bits(&s->pb, 1, 0); // ics_reserved bit
501 5250 put_bits(&s->pb, 2, info->window_sequence[0]);
502 5250 put_bits(&s->pb, 1, info->use_kb_window[0]);
503
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 5250 if (info->window_sequence[0] != EIGHT_SHORT_SEQUENCE) {
504 5090 put_bits(&s->pb, 6, info->max_sfb);
505 5090 put_bits(&s->pb, 1, 0); /* No predictor present */
506 } else {
507 160 put_bits(&s->pb, 4, info->max_sfb);
508
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 1280 for (w = 1; w < 8; w++)
509 1120 put_bits(&s->pb, 1, !info->group_len[w]);
510 }
511 5250 }
512
513 /**
514 * Encode MS data.
515 * @see 4.6.8.1 "Joint Coding - M/S Stereo"
516 */
517 4147 static void encode_ms_info(PutBitContext *pb, ChannelElement *cpe)
518 {
519 int i, w;
520
521 4147 put_bits(pb, 2, cpe->ms_mode);
522
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 4147 if (cpe->ms_mode == 1)
523
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 821 for (w = 0; w < cpe->ch[0].ics.num_windows; w += cpe->ch[0].ics.group_len[w])
524
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 19536 for (i = 0; i < cpe->ch[0].ics.max_sfb; i++)
525 19116 put_bits(pb, 1, cpe->ms_mask[w*16 + i]);
526 4147 }
527
528 /**
529 * Produce integer coefficients from scalefactors provided by the model.
530 */
531 5031 static void adjust_frame_information(ChannelElement *cpe, int chans)
532 {
533 int i, w, w2, g, ch;
534 int maxsfb, cmaxsfb;
535
536
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 14428 for (ch = 0; ch < chans; ch++) {
537 9397 IndividualChannelStream *ics = &cpe->ch[ch].ics;
538 9397 maxsfb = 0;
539 9397 cpe->ch[ch].pulse.num_pulse = 0;
540
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 19373 for (w = 0; w < ics->num_windows; w += ics->group_len[w]) {
541
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 20709 for (cmaxsfb = ics->num_swb; cmaxsfb > 0 && cpe->ch[ch].zeroes[w*16+cmaxsfb-1]; cmaxsfb--)
542 ;
543 9976 maxsfb = FFMAX(maxsfb, cmaxsfb);
544 }
545 9397 ics->max_sfb = maxsfb;
546
547 //adjust zero bands for window groups
548
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 19373 for (w = 0; w < ics->num_windows; w += ics->group_len[w]) {
549
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 456917 for (g = 0; g < ics->max_sfb; g++) {
550 446941 i = 1;
551
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 450037 for (w2 = w; w2 < w + ics->group_len[w]; w2++) {
552
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 447133 if (!cpe->ch[ch].zeroes[w2*16 + g]) {
553 444037 i = 0;
554 444037 break;
555 }
556 }
557 446941 cpe->ch[ch].zeroes[w*16 + g] = i;
558 }
559 }
560 }
561
562
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 5031 if (chans > 1 && cpe->common_window) {
563 4147 IndividualChannelStream *ics0 = &cpe->ch[0].ics;
564 4147 IndividualChannelStream *ics1 = &cpe->ch[1].ics;
565 4147 int msc = 0;
566 4147 ics0->max_sfb = FFMAX(ics0->max_sfb, ics1->max_sfb);
567 4147 ics1->max_sfb = ics0->max_sfb;
568
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 8742 for (w = 0; w < ics0->num_windows*16; w += 16)
569
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 206050 for (i = 0; i < ics0->max_sfb; i++)
570
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 201455 if (cpe->ms_mask[w+i])
571 24186 msc++;
572
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 4147 if (msc == 0 || ics0->max_sfb == 0)
573 3359 cpe->ms_mode = 0;
574 else
575
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 788 cpe->ms_mode = msc < ics0->max_sfb * ics0->num_windows ? 1 : 2;
576 }
577 5031 }
578
579 1333 static void apply_intensity_stereo(ChannelElement *cpe)
580 {
581 int w, w2, g, i;
582 1333 IndividualChannelStream *ics = &cpe->ch[0].ics;
583
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 1333 if (!cpe->common_window)
584 707 return;
585
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 1286 for (w = 0; w < ics->num_windows; w += ics->group_len[w]) {
586
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 1384 for (w2 = 0; w2 < ics->group_len[w]; w2++) {
587 724 int start = (w+w2) * 128;
588
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 32280 for (g = 0; g < ics->num_swb; g++) {
589 31556 int p = -1 + 2 * (cpe->ch[1].band_type[w*16+g] - 14);
590 31556 float scale = cpe->ch[0].is_ener[w*16+g];
591
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 31556 if (!cpe->is_mask[w*16 + g]) {
592 22900 start += ics->swb_sizes[g];
593 22900 continue;
594 }
595
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 8656 if (cpe->ms_mask[w*16 + g])
596 2383 p *= -1;
597
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 300184 for (i = 0; i < ics->swb_sizes[g]; i++) {
598 291528 float sum = (cpe->ch[0].coeffs[start+i] + p*cpe->ch[1].coeffs[start+i])*scale;
599 291528 cpe->ch[0].coeffs[start+i] = sum;
600 291528 cpe->ch[1].coeffs[start+i] = 0.0f;
601 }
602 8656 start += ics->swb_sizes[g];
603 }
604 }
605 }
606 }
607
608 1049 static void apply_mid_side_stereo(ChannelElement *cpe)
609 {
610 int w, w2, g, i;
611 1049 IndividualChannelStream *ics = &cpe->ch[0].ics;
612
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 1049 if (!cpe->common_window)
613 548 return;
614
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 1036 for (w = 0; w < ics->num_windows; w += ics->group_len[w]) {
615
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 1134 for (w2 = 0; w2 < ics->group_len[w]; w2++) {
616 599 int start = (w+w2) * 128;
617
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 26030 for (g = 0; g < ics->num_swb; g++) {
618 /* ms_mask can be used for other purposes in PNS and I/S,
619 * so must not apply M/S if any band uses either, even if
620 * ms_mask is set.
621 */
622
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 25431 if (!cpe->ms_mask[w*16 + g] || cpe->is_mask[w*16 + g]
623
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 22695 || cpe->ch[0].band_type[w*16 + g] >= NOISE_BT
624
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 22695 || cpe->ch[1].band_type[w*16 + g] >= NOISE_BT) {
625 2736 start += ics->swb_sizes[g];
626 2736 continue;
627 }
628
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 479187 for (i = 0; i < ics->swb_sizes[g]; i++) {
629 456492 float L = (cpe->ch[0].coeffs[start+i] + cpe->ch[1].coeffs[start+i]) * 0.5f;
630 456492 float R = L - cpe->ch[1].coeffs[start+i];
631 456492 cpe->ch[0].coeffs[start+i] = L;
632 456492 cpe->ch[1].coeffs[start+i] = R;
633 }
634 22695 start += ics->swb_sizes[g];
635 }
636 }
637 }
638 }
639
640 /**
641 * Encode scalefactor band coding type.
642 */
643 9397 static void encode_band_info(AACEncContext *s, SingleChannelElement *sce)
644 {
645 int w;
646
647
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 9397 if (s->coder->set_special_band_scalefactors)
648 9397 s->coder->set_special_band_scalefactors(s, sce);
649
650
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 19373 for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w])
651 9976 s->coder->encode_window_bands_info(s, sce, w, sce->ics.group_len[w], s->lambda);
652 9397 }
653
654 /**
655 * Encode scalefactors.
656 */
657 9397 static void encode_scale_factors(AVCodecContext *avctx, AACEncContext *s,
658 SingleChannelElement *sce)
659 {
660 9397 int diff, off_sf = sce->sf_idx[0], off_pns = sce->sf_idx[0] - NOISE_OFFSET;
661 9397 int off_is = 0, noise_flag = 1;
662 int i, w;
663
664
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 19373 for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) {
665
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 456922 for (i = 0; i < sce->ics.max_sfb; i++) {
666
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 446946 if (!sce->zeroes[w*16 + i]) {
667
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 437459 if (sce->band_type[w*16 + i] == NOISE_BT) {
668 6614 diff = sce->sf_idx[w*16 + i] - off_pns;
669 6614 off_pns = sce->sf_idx[w*16 + i];
670
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 6614 if (noise_flag-- > 0) {
671 1161 put_bits(&s->pb, NOISE_PRE_BITS, diff + NOISE_PRE);
672 1161 continue;
673 }
674
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 430845 } else if (sce->band_type[w*16 + i] == INTENSITY_BT ||
675
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 424538 sce->band_type[w*16 + i] == INTENSITY_BT2) {
676 8545 diff = sce->sf_idx[w*16 + i] - off_is;
677 8545 off_is = sce->sf_idx[w*16 + i];
678 } else {
679 422300 diff = sce->sf_idx[w*16 + i] - off_sf;
680 422300 off_sf = sce->sf_idx[w*16 + i];
681 }
682 436298 diff += SCALE_DIFF_ZERO;
683
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 436298 av_assert0(diff >= 0 && diff <= 120);
684 436298 put_bits(&s->pb, ff_aac_scalefactor_bits[diff], ff_aac_scalefactor_code[diff]);
685 }
686 }
687 }
688 9397 }
689
690 /**
691 * Encode pulse data.
692 */
693 9397 static void encode_pulses(AACEncContext *s, Pulse *pulse)
694 {
695 int i;
696
697 9397 put_bits(&s->pb, 1, !!pulse->num_pulse);
698
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 9397 if (!pulse->num_pulse)
699 9397 return;
700
701 ✗ put_bits(&s->pb, 2, pulse->num_pulse - 1);
702 ✗ put_bits(&s->pb, 6, pulse->start);
703 ✗ for (i = 0; i < pulse->num_pulse; i++) {
704 ✗ put_bits(&s->pb, 5, pulse->pos[i]);
705 ✗ put_bits(&s->pb, 4, pulse->amp[i]);
706 }
707 }
708
709 /**
710 * Encode spectral coefficients processed by psychoacoustic model.
711 */
712 9397 static void encode_spectral_coeffs(AACEncContext *s, SingleChannelElement *sce)
713 {
714 int start, i, w, w2;
715
716
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 19373 for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) {
717 9976 start = 0;
718
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 456922 for (i = 0; i < sce->ics.max_sfb; i++) {
719
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 446946 if (sce->zeroes[w*16 + i]) {
720 9487 start += sce->ics.swb_sizes[i];
721 9487 continue;
722 }
723
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 882155 for (w2 = w; w2 < w + sce->ics.group_len[w]; w2++) {
724 444696 s->coder->quantize_and_encode_band(s, &s->pb,
725 444696 &sce->coeffs[start + w2*128],
726 444696 NULL, sce->ics.swb_sizes[i],
727 444696 sce->sf_idx[w*16 + i],
728 444696 sce->band_type[w*16 + i],
729 s->lambda,
730 444696 sce->ics.window_clipping[w]);
731 }
732 437459 start += sce->ics.swb_sizes[i];
733 }
734 }
735 9397 }
736
737 /**
738 * Downscale spectral coefficients for near-clipping windows to avoid artifacts
739 */
740 6462 static void avoid_clipping(AACEncContext *s, SingleChannelElement *sce)
741 {
742 int start, i, j, w;
743
744
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 6462 if (sce->ics.clip_avoidance_factor < 1.0f) {
745
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 365 for (w = 0; w < sce->ics.num_windows; w++) {
746 207 start = 0;
747
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 8120 for (i = 0; i < sce->ics.max_sfb; i++) {
748 7913 float *swb_coeffs = &sce->coeffs[start + w*128];
749
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 157865 for (j = 0; j < sce->ics.swb_sizes[i]; j++)
750 149952 swb_coeffs[j] *= sce->ics.clip_avoidance_factor;
751 7913 start += sce->ics.swb_sizes[i];
752 }
753 }
754 }
755 6462 }
756
757 /**
758 * Encode one channel of audio data.
759 */
760 9397 static int encode_individual_channel(AVCodecContext *avctx, AACEncContext *s,
761 SingleChannelElement *sce,
762 int common_window)
763 {
764 9397 put_bits(&s->pb, 8, sce->sf_idx[0]);
765
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 9397 if (!common_window)
766 1103 put_ics_info(s, &sce->ics);
767 9397 encode_band_info(s, sce);
768 9397 encode_scale_factors(avctx, s, sce);
769 9397 encode_pulses(s, &sce->pulse);
770 9397 put_bits(&s->pb, 1, !!sce->tns.present);
771
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 9397 if (s->coder->encode_tns_info)
772 9397 s->coder->encode_tns_info(s, sce);
773 9397 put_bits(&s->pb, 1, 0); //ssr
774 9397 encode_spectral_coeffs(s, sce);
775 9397 return 0;
776 }
777
778 /**
779 * Write some auxiliary information about the created AAC file.
780 */
781 ✗ static void put_bitstream_info(AACEncContext *s, const char *name)
782 {
783 int i, namelen, padbits;
784
785 ✗ namelen = strlen(name) + 2;
786 ✗ put_bits(&s->pb, 3, TYPE_FIL);
787 ✗ put_bits(&s->pb, 4, FFMIN(namelen, 15));
788 ✗ if (namelen >= 15)
789 ✗ put_bits(&s->pb, 8, namelen - 14);
790 ✗ put_bits(&s->pb, 4, 0); //extension type - filler
791 ✗ padbits = -put_bits_count(&s->pb) & 7;
792 ✗ align_put_bits(&s->pb);
793 ✗ for (i = 0; i < namelen - 2; i++)
794 ✗ put_bits(&s->pb, 8, name[i]);
795 ✗ put_bits(&s->pb, 12 - padbits, 0);
796 ✗ }
797
798 /*
799 * Copy input samples.
800 * Channels are reordered from libavcodec's default order to AAC order.
801 */
802 3404 static void copy_input_samples(AACEncContext *s, const AVFrame *frame)
803 {
804 int ch;
805
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 3404 int end = 2048 + (frame ? frame->nb_samples : 0);
806 3404 const uint8_t *channel_map = s->reorder_map;
807
808 /* copy and remap input samples */
809
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 9889 for (ch = 0; ch < s->channels; ch++) {
810 /* copy last 1024 samples of previous frame to the start of the current frame */
811 6485 memcpy(&s->planar_samples[ch][1024], &s->planar_samples[ch][2048], 1024 * sizeof(s->planar_samples[0][0]));
812
813 /* copy new samples and zero any remaining samples */
814
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 6485 if (frame) {
815 6439 memcpy(&s->planar_samples[ch][2048],
816 6439 frame->extended_data[channel_map[ch]],
817 6439 frame->nb_samples * sizeof(s->planar_samples[0][0]));
818 }
819 6485 memset(&s->planar_samples[ch][end], 0,
820 6485 (3072 - end) * sizeof(s->planar_samples[0][0]));
821 }
822 3404 }
823
824 3414 static int aac_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
825 const AVFrame *frame, int *got_packet_ptr)
826 {
827 3414 AACEncContext *s = avctx->priv_data;
828 3414 float **samples = s->planar_samples, *samples2, *la, *overlap;
829 ChannelElement *cpe;
830 SingleChannelElement *sce;
831 IndividualChannelStream *ics;
832 int i, its, ch, w, chans, tag, start_ch, ret, frame_bits;
833 int target_bits, rate_bits, too_many_bits, too_few_bits;
834 3414 int ms_mode = 0, is_mode = 0, tns_mode = 0, pred_mode = 0;
835 int chan_el_counter[4];
836 FFPsyWindowInfo windows[AAC_MAX_CHANNELS];
837
838 /* add current frame to queue */
839
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 3414 if (frame) {
840
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 3384 if ((ret = ff_af_queue_add(&s->afq, frame)) < 0)
841 ✗ return ret;
842 } else {
843
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 30 if (!s->afq.remaining_samples || (!s->afq.frame_alloc && !s->afq.frame_count))
844 10 return 0;
845 }
846
847 3404 copy_input_samples(s, frame);
848
849
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 3404 if (!avctx->frame_num)
850 10 return 0;
851
852 3394 start_ch = 0;
853
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 6932 for (i = 0; i < s->chan_map[0]; i++) {
854 3538 FFPsyWindowInfo* wi = windows + start_ch;
855 3538 tag = s->chan_map[i+1];
856
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 3538 chans = tag == TYPE_CPE ? 2 : 1;
857 3538 cpe = &s->cpe[i];
858
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 10000 for (ch = 0; ch < chans; ch++) {
859 int k;
860 float clip_avoidance_factor;
861 6462 sce = &cpe->ch[ch];
862 6462 ics = &sce->ics;
863 6462 s->cur_channel = start_ch + ch;
864 6462 overlap = &samples[s->cur_channel][0];
865 6462 samples2 = overlap + 1024;
866 6462 la = samples2 + (448+64);
867
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 6462 if (!frame)
868 46 la = NULL;
869
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 6462 if (tag == TYPE_LFE) {
870 48 wi[ch].window_type[0] = wi[ch].window_type[1] = ONLY_LONG_SEQUENCE;
871 48 wi[ch].window_shape = 0;
872 48 wi[ch].num_windows = 1;
873 48 wi[ch].grouping[0] = 1;
874 48 wi[ch].clipping[0] = 0;
875
876 /* Only the lowest 12 coefficients are used in a LFE channel.
877 * The expression below results in only the bottom 8 coefficients
878 * being used for 11.025kHz to 16kHz sample rates.
879 */
880
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 48 ics->num_swb = s->samplerate_index >= 8 ? 1 : 3;
881 } else {
882 6414 wi[ch] = s->psy.model->window(&s->psy, samples2, la, s->cur_channel,
883 6414 ics->window_sequence[0]);
884 }
885 6462 ics->window_sequence[1] = ics->window_sequence[0];
886 6462 ics->window_sequence[0] = wi[ch].window_type[0];
887 6462 ics->use_kb_window[1] = ics->use_kb_window[0];
888 6462 ics->use_kb_window[0] = wi[ch].window_shape;
889 6462 ics->num_windows = wi[ch].num_windows;
890
2/2
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✓ Branch 1 taken 6317 times.
 6462 ics->swb_sizes = s->psy.bands [ics->num_windows == 8];
891
4/4
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✓ Branch 1 taken 6414 times.
✓ Branch 2 taken 145 times.
✓ Branch 3 taken 6269 times.
 6462 ics->num_swb = tag == TYPE_LFE ? ics->num_swb : s->psy.num_bands[ics->num_windows == 8];
892 6462 ics->max_sfb = FFMIN(ics->max_sfb, ics->num_swb);
893 12924 ics->swb_offset = wi[ch].window_type[0] == EIGHT_SHORT_SEQUENCE ?
894
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✓ Branch 1 taken 6317 times.
 6462 ff_swb_offset_128 [s->samplerate_index]:
895 6317 ff_swb_offset_1024[s->samplerate_index];
896 12924 ics->tns_max_bands = wi[ch].window_type[0] == EIGHT_SHORT_SEQUENCE ?
897
2/2
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✓ Branch 1 taken 6317 times.
 6462 ff_tns_max_bands_128 [s->samplerate_index]:
898 6317 ff_tns_max_bands_1024[s->samplerate_index];
899
900
2/2
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✓ Branch 1 taken 6462 times.
 13939 for (w = 0; w < ics->num_windows; w++)
901 7477 ics->group_len[w] = wi[ch].grouping[w];
902
903 /* Calculate input sample maximums and evaluate clipping risk */
904 6462 clip_avoidance_factor = 0.0f;
905
2/2
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✓ Branch 1 taken 6462 times.
 13939 for (w = 0; w < ics->num_windows; w++) {
906 7477 const float *wbuf = overlap + w * 128;
907 7477 const int wlen = 2048 / ics->num_windows;
908 7477 float max = 0;
909 int j;
910 /* mdct input is 2 * output */
911
2/2
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✓ Branch 1 taken 7477 times.
 13241653 for (j = 0; j < wlen; j++)
912
2/2
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✓ Branch 1 taken 290296 times.
 13234176 max = FFMAX(max, fabsf(wbuf[j]));
913 7477 wi[ch].clipping[w] = max;
914 }
915
2/2
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✓ Branch 1 taken 6462 times.
 13939 for (w = 0; w < ics->num_windows; w++) {
916
2/2
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✓ Branch 1 taken 7312 times.
 7477 if (wi[ch].clipping[w] > CLIP_AVOIDANCE_FACTOR) {
917 165 ics->window_clipping[w] = 1;
918
1/2
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✓ Branch 1 taken 165 times.
 165 clip_avoidance_factor = FFMAX(clip_avoidance_factor, wi[ch].clipping[w]);
919 } else {
920 7312 ics->window_clipping[w] = 0;
921 }
922 }
923
2/2
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✓ Branch 1 taken 6304 times.
 6462 if (clip_avoidance_factor > CLIP_AVOIDANCE_FACTOR) {
924 158 ics->clip_avoidance_factor = CLIP_AVOIDANCE_FACTOR / clip_avoidance_factor;
925 } else {
926 6304 ics->clip_avoidance_factor = 1.0f;
927 }
928
929 6462 apply_window_and_mdct(s, sce, overlap);
930
931
2/2
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✓ Branch 1 taken 6462 times.
 6623550 for (k = 0; k < 1024; k++) {
932
1/2
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✓ Branch 1 taken 6617088 times.
 6617088 if (!(fabs(cpe->ch[ch].coeffs[k]) < 1E16)) { // Ensure headroom for energy calculation
933 ✗ av_log(avctx, AV_LOG_ERROR, "Input contains (near) NaN/+-Inf\n");
934 ✗ return AVERROR(EINVAL);
935 }
936 }
937 6462 avoid_clipping(s, sce);
938 }
939 3538 start_ch += chans;
940 }
941
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 3394 times.
 3394 if ((ret = ff_alloc_packet(avctx, avpkt, 8192 * s->channels)) < 0)
942 ✗ return ret;
943 3394 frame_bits = its = 0;
944 do {
945 4815 init_put_bits(&s->pb, avpkt->data, avpkt->size);
946
947
3/4
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✓ Branch 1 taken 4782 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 33 times.
 4815 if ((avctx->frame_num & 0xFF)==1 && !(avctx->flags & AV_CODEC_FLAG_BITEXACT))
948 ✗ put_bitstream_info(s, LIBAVCODEC_IDENT);
949 4815 start_ch = 0;
950 4815 target_bits = 0;
951 4815 memset(chan_el_counter, 0, sizeof(chan_el_counter));
952
2/2
✓ Branch 0 taken 5031 times.
✓ Branch 1 taken 4815 times.
 9846 for (i = 0; i < s->chan_map[0]; i++) {
953 5031 FFPsyWindowInfo* wi = windows + start_ch;
954 const float *coeffs[2];
955 5031 tag = s->chan_map[i+1];
956
2/2
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✓ Branch 1 taken 665 times.
 5031 chans = tag == TYPE_CPE ? 2 : 1;
957 5031 cpe = &s->cpe[i];
958 5031 cpe->common_window = 0;
959 5031 memset(cpe->is_mask, 0, sizeof(cpe->is_mask));
960 5031 memset(cpe->ms_mask, 0, sizeof(cpe->ms_mask));
961 5031 put_bits(&s->pb, 3, tag);
962 5031 put_bits(&s->pb, 4, chan_el_counter[tag]++);
963
2/2
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✓ Branch 1 taken 5031 times.
 14428 for (ch = 0; ch < chans; ch++) {
964 9397 sce = &cpe->ch[ch];
965 9397 coeffs[ch] = sce->coeffs;
966 9397 memset(&sce->tns, 0, sizeof(TemporalNoiseShaping));
967
2/2
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✓ Branch 1 taken 9397 times.
 1212213 for (w = 0; w < 128; w++)
968
2/2
✓ Branch 0 taken 15091 times.
✓ Branch 1 taken 1187725 times.
 1202816 if (sce->band_type[w] > RESERVED_BT)
969 15091 sce->band_type[w] = 0;
970 }
971 5031 s->psy.bitres.alloc = -1;
972 5031 s->psy.bitres.bits = s->last_frame_pb_count / s->channels;
973 5031 s->psy.model->analyze(&s->psy, start_ch, coeffs, wi);
974
1/2
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✗ Branch 1 not taken.
 5031 if (s->psy.bitres.alloc > 0) {
975 /* Lambda unused here on purpose, we need to take psy's unscaled allocation */
976 10062 target_bits += s->psy.bitres.alloc
977
1/2
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✓ Branch 1 taken 5031 times.
 5031 * (s->lambda / (avctx->global_quality ? avctx->global_quality : 120));
978 5031 s->psy.bitres.alloc /= chans;
979 }
980 5031 s->cur_type = tag;
981
2/2
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✓ Branch 1 taken 5031 times.
 14428 for (ch = 0; ch < chans; ch++) {
982 9397 s->cur_channel = start_ch + ch;
983
3/4
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✓ Branch 1 taken 7396 times.
✓ Branch 2 taken 2001 times.
✗ Branch 3 not taken.
 9397 if (s->options.pns && s->coder->mark_pns)
984 2001 s->coder->mark_pns(s, avctx, &cpe->ch[ch]);
985 9397 s->coder->search_for_quantizers(avctx, s, &cpe->ch[ch], s->lambda);
986 }
987
2/2
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✓ Branch 1 taken 665 times.
 5031 if (chans > 1
988
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✓ Branch 1 taken 211 times.
 4366 && wi[0].window_type[0] == wi[1].window_type[0]
989
1/2
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✗ Branch 1 not taken.
 4155 && wi[0].window_shape == wi[1].window_shape) {
990
991 4155 cpe->common_window = 1;
992
2/2
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✓ Branch 1 taken 4147 times.
 8750 for (w = 0; w < wi[0].num_windows; w++) {
993
2/2
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✓ Branch 1 taken 4595 times.
 4603 if (wi[0].grouping[w] != wi[1].grouping[w]) {
994 8 cpe->common_window = 0;
995 8 break;
996 }
997 }
998 }
999
2/2
✓ Branch 0 taken 9397 times.
✓ Branch 1 taken 5031 times.
 14428 for (ch = 0; ch < chans; ch++) { /* TNS and PNS */
1000 9397 sce = &cpe->ch[ch];
1001 9397 s->cur_channel = start_ch + ch;
1002
3/4
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✓ Branch 1 taken 7396 times.
✓ Branch 2 taken 2001 times.
✗ Branch 3 not taken.
 9397 if (s->options.tns && s->coder->search_for_tns)
1003 2001 s->coder->search_for_tns(s, sce);
1004
3/4
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✓ Branch 1 taken 7396 times.
✓ Branch 2 taken 2001 times.
✗ Branch 3 not taken.
 9397 if (s->options.tns && s->coder->apply_tns_filt)
1005 2001 s->coder->apply_tns_filt(s, sce);
1006
2/2
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✓ Branch 1 taken 9357 times.
 9397 if (sce->tns.present)
1007 40 tns_mode = 1;
1008
3/4
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✓ Branch 2 taken 2001 times.
✗ Branch 3 not taken.
 9397 if (s->options.pns && s->coder->search_for_pns)
1009 2001 s->coder->search_for_pns(s, avctx, sce);
1010 }
1011 5031 s->cur_channel = start_ch;
1012
2/2
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✓ Branch 1 taken 3698 times.
 5031 if (s->options.intensity_stereo) { /* Intensity Stereo */
1013
1/2
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✗ Branch 1 not taken.
 1333 if (s->coder->search_for_is)
1014 1333 s->coder->search_for_is(s, avctx, cpe);
1015
2/2
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✓ Branch 1 taken 822 times.
 1333 if (cpe->is_mode) is_mode = 1;
1016 1333 apply_intensity_stereo(cpe);
1017 }
1018
2/2
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✓ Branch 1 taken 3982 times.
 5031 if (s->options.mid_side) { /* Mid/Side stereo */
1019
3/4
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✓ Branch 1 taken 420 times.
✓ Branch 2 taken 629 times.
✗ Branch 3 not taken.
 1049 if (s->options.mid_side == -1 && s->coder->search_for_ms)
1020 629 s->coder->search_for_ms(s, cpe);
1021
2/2
✓ Branch 0 taken 393 times.
✓ Branch 1 taken 27 times.
 420 else if (cpe->common_window)
1022 393 memset(cpe->ms_mask, 1, sizeof(cpe->ms_mask));
1023 1049 apply_mid_side_stereo(cpe);
1024 }
1025 5031 adjust_frame_information(cpe, chans);
1026
2/2
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✓ Branch 1 taken 665 times.
 5031 if (chans == 2) {
1027 4366 put_bits(&s->pb, 1, cpe->common_window);
1028
2/2
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✓ Branch 1 taken 219 times.
 4366 if (cpe->common_window) {
1029 4147 put_ics_info(s, &cpe->ch[0].ics);
1030 4147 encode_ms_info(&s->pb, cpe);
1031
2/2
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✓ Branch 1 taken 3359 times.
 4147 if (cpe->ms_mode) ms_mode = 1;
1032 }
1033 }
1034
2/2
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✓ Branch 1 taken 5031 times.
 14428 for (ch = 0; ch < chans; ch++) {
1035 9397 s->cur_channel = start_ch + ch;
1036 9397 encode_individual_channel(avctx, s, &cpe->ch[ch], cpe->common_window);
1037 }
1038 5031 start_ch += chans;
1039 }
1040
1041
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✓ Branch 1 taken 4815 times.
 4815 if (avctx->flags & AV_CODEC_FLAG_QSCALE) {
1042 /* When using a constant Q-scale, don't mess with lambda */
1043 ✗ break;
1044 }
1045
1046 /* rate control stuff
1047 * allow between the nominal bitrate, and what psy's bit reservoir says to target
1048 * but drift towards the nominal bitrate always
1049 */
1050 4815 frame_bits = put_bits_count(&s->pb);
1051 4815 rate_bits = avctx->bit_rate * 1024 / avctx->sample_rate;
1052
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 4815 rate_bits = FFMIN(rate_bits, 6144 * s->channels - 3);
1053 4815 too_many_bits = FFMAX(target_bits, rate_bits);
1054
2/2
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✓ Branch 1 taken 2745 times.
 4815 too_many_bits = FFMIN(too_many_bits, 6144 * s->channels - 3);
1055 4815 too_few_bits = FFMIN(FFMAX(rate_bits - rate_bits/4, target_bits), too_many_bits);
1056
1057 /* When strict bit-rate control is demanded */
1058
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 4815 if (avctx->bit_rate_tolerance == 0) {
1059 ✗ if (rate_bits < frame_bits) {
1060 ✗ float ratio = ((float)rate_bits) / frame_bits;
1061 ✗ s->lambda *= FFMIN(0.9f, ratio);
1062 ✗ continue;
1063 }
1064 /* reset lambda when solution is found */
1065 ✗ s->lambda = avctx->global_quality > 0 ? avctx->global_quality : 120;
1066 ✗ break;
1067 }
1068
1069 /* When using ABR, be strict (but only for increasing) */
1070 4815 too_few_bits = too_few_bits - too_few_bits/8;
1071 4815 too_many_bits = too_many_bits + too_many_bits/2;
1072
1073
2/2
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✓ Branch 1 taken 3394 times.
 4815 if ( its == 0 /* for steady-state Q-scale tracking */
1074
5/6
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✓ Branch 1 taken 280 times.
✓ Branch 2 taken 8 times.
✓ Branch 3 taken 1133 times.
✓ Branch 4 taken 8 times.
✗ Branch 5 not taken.
 1421 || (its < 5 && (frame_bits < too_few_bits || frame_bits > too_many_bits))
1075
1/2
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✓ Branch 1 taken 288 times.
 288 || frame_bits >= 6144 * s->channels - 3 )
1076 {
1077 4527 float ratio = ((float)rate_bits) / frame_bits;
1078
1079
4/4
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✓ Branch 1 taken 2011 times.
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✓ Branch 3 taken 1 times.
 4527 if (frame_bits >= too_few_bits && frame_bits <= too_many_bits) {
1080 /*
1081 * This path is for steady-state Q-scale tracking
1082 * When frame bits fall within the stable range, we still need to adjust
1083 * lambda to maintain it like so in a stable fashion (large jumps in lambda
1084 * create artifacts and should be avoided), but slowly
1085 */
1086 2515 ratio = sqrtf(sqrtf(ratio));
1087 2515 ratio = av_clipf(ratio, 0.9f, 1.1f);
1088 } else {
1089 /* Not so fast though */
1090 2012 ratio = sqrtf(ratio);
1091 }
1092 4527 s->lambda = av_clipf(s->lambda * ratio, FLT_EPSILON, 65536.f);
1093
1094 /* Keep iterating if we must reduce and lambda is in the sky */
1095
4/4
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✓ Branch 2 taken 1401 times.
✓ Branch 3 taken 3106 times.
 4527 if (ratio > 0.9f && ratio < 1.1f) {
1096 break;
1097 } else {
1098
6/8
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✓ Branch 2 taken 1407 times.
✓ Branch 3 taken 3 times.
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 1421 if (is_mode || ms_mode || tns_mode || pred_mode) {
1099
2/2
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✓ Branch 1 taken 14 times.
 43 for (i = 0; i < s->chan_map[0]; i++) {
1100 // Must restore coeffs
1101
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✓ Branch 1 taken 20 times.
 29 chans = tag == TYPE_CPE ? 2 : 1;
1102 29 cpe = &s->cpe[i];
1103
2/2
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✓ Branch 1 taken 29 times.
 67 for (ch = 0; ch < chans; ch++)
1104 38 memcpy(cpe->ch[ch].coeffs, cpe->ch[ch].pcoeffs, sizeof(cpe->ch[ch].coeffs));
1105 }
1106 }
1107 1421 its++;
1108 }
1109 } else {
1110 break;
1111 }
1112 } while (1);
1113
1114 3394 put_bits(&s->pb, 3, TYPE_END);
1115 3394 flush_put_bits(&s->pb);
1116
1117 3394 s->last_frame_pb_count = put_bits_count(&s->pb);
1118 3394 avpkt->size = put_bytes_output(&s->pb);
1119
1120 3394 s->lambda_sum += s->lambda;
1121 3394 s->lambda_count++;
1122
1123 3394 ff_af_queue_remove(&s->afq, avctx->frame_size, &avpkt->pts,
1124 &avpkt->duration);
1125
1126 3394 avpkt->flags |= AV_PKT_FLAG_KEY;
1127
1128 3394 *got_packet_ptr = 1;
1129 3394 return 0;
1130 }
1131
1132 10 static av_cold int aac_encode_end(AVCodecContext *avctx)
1133 {
1134 10 AACEncContext *s = avctx->priv_data;
1135
1136
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✗ Branch 1 not taken.
 10 av_log(avctx, AV_LOG_INFO, "Qavg: %.3f\n", s->lambda_count ? s->lambda_sum / s->lambda_count : NAN);
1137
1138 10 av_tx_uninit(&s->mdct1024);
1139 10 av_tx_uninit(&s->mdct128);
1140 10 ff_psy_end(&s->psy);
1141 10 ff_lpc_end(&s->lpc);
1142 10 av_freep(&s->buffer.samples);
1143 10 av_freep(&s->cpe);
1144 10 av_freep(&s->fdsp);
1145 10 ff_af_queue_close(&s->afq);
1146 10 return 0;
1147 }
1148
1149 10 static av_cold int dsp_init(AVCodecContext *avctx, AACEncContext *s)
1150 {
1151 10 int ret = 0;
1152 10 float scale = 32768.0f;
1153
1154 10 s->fdsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT);
1155
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 10 if (!s->fdsp)
1156 ✗ return AVERROR(ENOMEM);
1157
1158
1/2
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 10 if ((ret = av_tx_init(&s->mdct1024, &s->mdct1024_fn, AV_TX_FLOAT_MDCT, 0,
1159 1024, &scale, 0)) < 0)
1160 ✗ return ret;
1161
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 10 times.
 10 if ((ret = av_tx_init(&s->mdct128, &s->mdct128_fn, AV_TX_FLOAT_MDCT, 0,
1162 128, &scale, 0)) < 0)
1163 ✗ return ret;
1164
1165 10 return 0;
1166 }
1167
1168 10 static av_cold int alloc_buffers(AVCodecContext *avctx, AACEncContext *s)
1169 {
1170 int ch;
1171
1/2
✓ Branch 1 taken 10 times.
✗ Branch 2 not taken.
 10 if (!FF_ALLOCZ_TYPED_ARRAY(s->buffer.samples, s->channels * 3 * 1024) ||
1172
1/2
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✓ Branch 2 taken 10 times.
 10 !FF_ALLOCZ_TYPED_ARRAY(s->cpe, s->chan_map[0]))
1173 ✗ return AVERROR(ENOMEM);
1174
1175
2/2
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✓ Branch 1 taken 10 times.
 33 for(ch = 0; ch < s->channels; ch++)
1176 23 s->planar_samples[ch] = s->buffer.samples + 3 * 1024 * ch;
1177
1178 10 return 0;
1179 }
1180
1181 10 static av_cold int aac_encode_init(AVCodecContext *avctx)
1182 {
1183 10 AACEncContext *s = avctx->priv_data;
1184 10 int i, ret = 0;
1185 const uint8_t *sizes[2];
1186 uint8_t grouping[AAC_MAX_CHANNELS];
1187 int lengths[2];
1188
1189 /* Constants */
1190 10 s->last_frame_pb_count = 0;
1191 10 avctx->frame_size = 1024;
1192 10 avctx->initial_padding = 1024;
1193
1/2
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✓ Branch 1 taken 10 times.
 10 s->lambda = avctx->global_quality > 0 ? avctx->global_quality : 120;
1194
1195 /* Channel map and unspecified bitrate guessing */
1196 10 s->channels = avctx->ch_layout.nb_channels;
1197
1198 10 s->needs_pce = 1;
1199
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✗ Branch 1 not taken.
 23 for (i = 0; i < FF_ARRAY_ELEMS(aac_normal_chan_layouts); i++) {
1200
2/2
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✓ Branch 2 taken 13 times.
 23 if (!av_channel_layout_compare(&avctx->ch_layout, &aac_normal_chan_layouts[i])) {
1201 10 s->needs_pce = s->options.pce;
1202 10 break;
1203 }
1204 }
1205
1206
1/2
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 10 if (s->needs_pce) {
1207 char buf[64];
1208 ✗ for (i = 0; i < FF_ARRAY_ELEMS(aac_pce_configs); i++)
1209 ✗ if (!av_channel_layout_compare(&avctx->ch_layout, &aac_pce_configs[i].layout))
1210 ✗ break;
1211 ✗ av_channel_layout_describe(&avctx->ch_layout, buf, sizeof(buf));
1212 ✗ if (i == FF_ARRAY_ELEMS(aac_pce_configs)) {
1213 ✗ av_log(avctx, AV_LOG_ERROR, "Unsupported channel layout \"%s\"\n", buf);
1214 ✗ return AVERROR(EINVAL);
1215 }
1216 ✗ av_log(avctx, AV_LOG_INFO, "Using a PCE to encode channel layout \"%s\"\n", buf);
1217 ✗ s->pce = aac_pce_configs[i];
1218 ✗ s->reorder_map = s->pce.reorder_map;
1219 ✗ s->chan_map = s->pce.config_map;
1220 } else {
1221 10 s->reorder_map = aac_chan_maps[s->channels - 1];
1222 10 s->chan_map = aac_chan_configs[s->channels - 1];
1223 }
1224
1225
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✓ Branch 1 taken 7 times.
 10 if (!avctx->bit_rate) {
1226
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✓ Branch 1 taken 3 times.
 9 for (i = 1; i <= s->chan_map[0]; i++) {
1227
2/2
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✓ Branch 1 taken 3 times.
 9 avctx->bit_rate += s->chan_map[i] == TYPE_CPE ? 128000 : /* Pair */
1228
2/2
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✓ Branch 1 taken 2 times.
 3 s->chan_map[i] == TYPE_LFE ? 16000 : /* LFE */
1229 69000 ; /* SCE */
1230 }
1231 }
1232
1233 /* Samplerate */
1234 10 for (int i = 0;; i++) {
1235 39 av_assert1(i < 13);
1236
2/2
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✓ Branch 1 taken 39 times.
 49 if (avctx->sample_rate == ff_mpeg4audio_sample_rates[i]) {
1237 10 s->samplerate_index = i;
1238 10 break;
1239 }
1240 }
1241
1242 /* Bitrate limiting */
1243
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 10 WARN_IF(1024.0 * avctx->bit_rate / avctx->sample_rate > 6144 * s->channels,
1244 "Too many bits %f > %d per frame requested, clamping to max\n",
1245 1024.0 * avctx->bit_rate / avctx->sample_rate,
1246 6144 * s->channels);
1247
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 10 avctx->bit_rate = (int64_t)FFMIN(6144 * s->channels / 1024.0 * avctx->sample_rate,
1248 avctx->bit_rate);
1249
1250 /* Profile and option setting */
1251
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 10 avctx->profile = avctx->profile == AV_PROFILE_UNKNOWN ? AV_PROFILE_AAC_LOW :
1252 avctx->profile;
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 10 for (i = 0; i < FF_ARRAY_ELEMS(aacenc_profiles); i++)
1254
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 10 if (avctx->profile == aacenc_profiles[i])
1255 10 break;
1256
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 10 ERROR_IF(i == FF_ARRAY_ELEMS(aacenc_profiles), "Profile not supported!\n");
1257
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 10 if (avctx->profile == AV_PROFILE_MPEG2_AAC_LOW) {
1258 ✗ avctx->profile = AV_PROFILE_AAC_LOW;
1259 ✗ WARN_IF(s->options.pns,
1260 "PNS unavailable in the \"mpeg2_aac_low\" profile, turning off\n");
1261 ✗ s->options.pns = 0;
1262 }
1263 10 s->profile = avctx->profile;
1264
1265 /* Coder limitations */
1266 10 s->coder = &ff_aac_coders[s->options.coder];
1267
1268 /* M/S introduces horrible artifacts with multichannel files, this is temporary */
1269
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 10 if (s->channels > 3)
1270 1 s->options.mid_side = 0;
1271
1272 // Initialize static tables
1273 10 ff_aac_float_common_init();
1274
1275
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 10 if ((ret = dsp_init(avctx, s)) < 0)
1276 ✗ return ret;
1277
1278
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 10 if ((ret = alloc_buffers(avctx, s)) < 0)
1279 ✗ return ret;
1280
1281
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 10 if ((ret = put_audio_specific_config(avctx)))
1282 ✗ return ret;
1283
1284 10 sizes[0] = ff_aac_swb_size_1024[s->samplerate_index];
1285 10 sizes[1] = ff_aac_swb_size_128[s->samplerate_index];
1286 10 lengths[0] = ff_aac_num_swb_1024[s->samplerate_index];
1287 10 lengths[1] = ff_aac_num_swb_128[s->samplerate_index];
1288
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 23 for (i = 0; i < s->chan_map[0]; i++)
1289 13 grouping[i] = s->chan_map[i + 1] == TYPE_CPE;
1290
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 10 if ((ret = ff_psy_init(&s->psy, avctx, 2, sizes, lengths,
1291 10 s->chan_map[0], grouping)) < 0)
1292 ✗ return ret;
1293 10 ff_lpc_init(&s->lpc, 2*avctx->frame_size, TNS_MAX_ORDER, FF_LPC_TYPE_LEVINSON);
1294 10 s->random_state = 0x1f2e3d4c;
1295
1296 10 ff_aacenc_dsp_init(&s->aacdsp);
1297
1298 10 ff_af_queue_init(avctx, &s->afq);
1299
1300 10 return 0;
1301 }
1302
1303 #define AACENC_FLAGS AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM
1304 static const AVOption aacenc_options[] = {
1305 {"aac_coder", "Coding algorithm", offsetof(AACEncContext, options.coder), AV_OPT_TYPE_INT, {.i64 = AAC_CODER_TWOLOOP}, 0, AAC_CODER_NB-1, AACENC_FLAGS, .unit = "coder"},
1306 {"twoloop", "Two loop searching method", 0, AV_OPT_TYPE_CONST, {.i64 = AAC_CODER_TWOLOOP}, INT_MIN, INT_MAX, AACENC_FLAGS, .unit = "coder"},
1307 {"fast", "Fast search", 0, AV_OPT_TYPE_CONST, {.i64 = AAC_CODER_FAST}, INT_MIN, INT_MAX, AACENC_FLAGS, .unit = "coder"},
1308 {"aac_ms", "Force M/S stereo coding", offsetof(AACEncContext, options.mid_side), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, AACENC_FLAGS},
1309 {"aac_is", "Intensity stereo coding", offsetof(AACEncContext, options.intensity_stereo), AV_OPT_TYPE_BOOL, {.i64 = 1}, -1, 1, AACENC_FLAGS},
1310 {"aac_pns", "Perceptual noise substitution", offsetof(AACEncContext, options.pns), AV_OPT_TYPE_BOOL, {.i64 = 1}, -1, 1, AACENC_FLAGS},
1311 {"aac_tns", "Temporal noise shaping", offsetof(AACEncContext, options.tns), AV_OPT_TYPE_BOOL, {.i64 = 1}, -1, 1, AACENC_FLAGS},
1312 {"aac_pce", "Forces the use of PCEs", offsetof(AACEncContext, options.pce), AV_OPT_TYPE_BOOL, {.i64 = 0}, -1, 1, AACENC_FLAGS},
1313 FF_AAC_PROFILE_OPTS
1314 {NULL}
1315 };
1316
1317 static const AVClass aacenc_class = {
1318 .class_name = "AAC encoder",
1319 .item_name = av_default_item_name,
1320 .option = aacenc_options,
1321 .version = LIBAVUTIL_VERSION_INT,
1322 };
1323
1324 static const FFCodecDefault aac_encode_defaults[] = {
1325 { "b", "0" },
1326 { NULL }
1327 };
1328
1329 const FFCodec ff_aac_encoder = {
1330 .p.name = "aac",
1331 CODEC_LONG_NAME("AAC (Advanced Audio Coding)"),
1332 .p.type = AVMEDIA_TYPE_AUDIO,
1333 .p.id = AV_CODEC_ID_AAC,
1334 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |
1335 AV_CODEC_CAP_SMALL_LAST_FRAME,
1336 .priv_data_size = sizeof(AACEncContext),
1337 .init = aac_encode_init,
1338 FF_CODEC_ENCODE_CB(aac_encode_frame),
1339 .close = aac_encode_end,
1340 .defaults = aac_encode_defaults,
1341 CODEC_SAMPLERATES_ARRAY(ff_mpeg4audio_sample_rates),
1342 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1343 CODEC_SAMPLEFMTS(AV_SAMPLE_FMT_FLTP),
1344 .p.priv_class = &aacenc_class,
1345 };
1346