FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/aacenc.c
Date: 2024-11-20 23:03:26
Exec Total Coverage
Lines: 551 659 83.6%
Functions: 24 26 92.3%
Branches: 353 490 72.0%
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 11 static int put_audio_specific_config(AVCodecContext *avctx)
370 {
371 PutBitContext pb;
372 11 AACEncContext *s = avctx->priv_data;
373 11 int channels = (!s->needs_pce)*(s->channels - (s->channels == 8 ? 1 : 0));
374 11 const int max_size = 32;
375
376 11 avctx->extradata = av_mallocz(max_size);
377
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 11 if (!avctx->extradata)
378 ✗ return AVERROR(ENOMEM);
379
380 11 init_put_bits(&pb, avctx->extradata, max_size);
381 11 put_bits(&pb, 5, s->profile+1); //profile
382 11 put_bits(&pb, 4, s->samplerate_index); //sample rate index
383 11 put_bits(&pb, 4, channels);
384 //GASpecificConfig
385 11 put_bits(&pb, 1, 0); //frame length - 1024 samples
386 11 put_bits(&pb, 1, 0); //does not depend on core coder
387 11 put_bits(&pb, 1, 0); //is not extension
388
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 11 if (s->needs_pce)
389 ✗ put_pce(&pb, avctx);
390
391 //Explicitly Mark SBR absent
392 11 put_bits(&pb, 11, 0x2b7); //sync extension
393 11 put_bits(&pb, 5, AOT_SBR);
394 11 put_bits(&pb, 1, 0);
395 11 flush_put_bits(&pb);
396 11 avctx->extradata_size = put_bytes_output(&pb);
397
398 11 return 0;
399 }
400
401 10135 void ff_quantize_band_cost_cache_init(struct AACEncContext *s)
402 {
403 10135 ++s->quantize_band_cost_cache_generation;
404
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 10135 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 10135 }
409
410 #define WINDOW_FUNC(type) \
411 static void apply_ ##type ##_window(AVFloatDSPContext *fdsp, \
412 SingleChannelElement *sce, \
413 const float *audio)
414
415 6899 WINDOW_FUNC(only_long)
416 {
417
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 6899 const float *lwindow = sce->ics.use_kb_window[0] ? ff_aac_kbd_long_1024 : ff_sine_1024;
418
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 6899 const float *pwindow = sce->ics.use_kb_window[1] ? ff_aac_kbd_long_1024 : ff_sine_1024;
419 6899 float *out = sce->ret_buf;
420
421 6899 fdsp->vector_fmul (out, audio, lwindow, 1024);
422 6899 fdsp->vector_fmul_reverse(out + 1024, audio + 1024, pwindow, 1024);
423 6899 }
424
425 119 WINDOW_FUNC(long_start)
426 {
427
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 119 const float *lwindow = sce->ics.use_kb_window[1] ? ff_aac_kbd_long_1024 : ff_sine_1024;
428
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 119 const float *swindow = sce->ics.use_kb_window[0] ? ff_aac_kbd_short_128 : ff_sine_128;
429 119 float *out = sce->ret_buf;
430
431 119 fdsp->vector_fmul(out, audio, lwindow, 1024);
432 119 memcpy(out + 1024, audio + 1024, sizeof(out[0]) * 448);
433 119 fdsp->vector_fmul_reverse(out + 1024 + 448, audio + 1024 + 448, swindow, 128);
434 119 memset(out + 1024 + 576, 0, sizeof(out[0]) * 448);
435 119 }
436
437 102 WINDOW_FUNC(long_stop)
438 {
439
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 102 const float *lwindow = sce->ics.use_kb_window[0] ? ff_aac_kbd_long_1024 : ff_sine_1024;
440
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 102 const float *swindow = sce->ics.use_kb_window[1] ? ff_aac_kbd_short_128 : ff_sine_128;
441 102 float *out = sce->ret_buf;
442
443 102 memset(out, 0, sizeof(out[0]) * 448);
444 102 fdsp->vector_fmul(out + 448, audio + 448, swindow, 128);
445 102 memcpy(out + 576, audio + 576, sizeof(out[0]) * 448);
446 102 fdsp->vector_fmul_reverse(out + 1024, audio + 1024, lwindow, 1024);
447 102 }
448
449 164 WINDOW_FUNC(eight_short)
450 {
451
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 164 const float *swindow = sce->ics.use_kb_window[0] ? ff_aac_kbd_short_128 : ff_sine_128;
452
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 164 const float *pwindow = sce->ics.use_kb_window[1] ? ff_aac_kbd_short_128 : ff_sine_128;
453 164 const float *in = audio + 448;
454 164 float *out = sce->ret_buf;
455 int w;
456
457
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 1476 for (w = 0; w < 8; w++) {
458
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 1312 fdsp->vector_fmul (out, in, w ? pwindow : swindow, 128);
459 1312 out += 128;
460 1312 in += 128;
461 1312 fdsp->vector_fmul_reverse(out, in, swindow, 128);
462 1312 out += 128;
463 }
464 164 }
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 7284 static void apply_window_and_mdct(AACEncContext *s, SingleChannelElement *sce,
476 float *audio)
477 {
478 int i;
479 7284 float *output = sce->ret_buf;
480
481 7284 apply_window[sce->ics.window_sequence[0]](s->fdsp, sce, audio);
482
483
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 7284 if (sce->ics.window_sequence[0] != EIGHT_SHORT_SEQUENCE)
484 7120 s->mdct1024_fn(s->mdct1024, sce->coeffs, output, sizeof(float));
485 else
486
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 1476 for (i = 0; i < 1024; i += 128)
487 1312 s->mdct128_fn(s->mdct128, &sce->coeffs[i], output + i*2, sizeof(float));
488 7284 memcpy(audio, audio + 1024, sizeof(audio[0]) * 1024);
489 7284 memcpy(sce->pcoeffs, sce->coeffs, sizeof(sce->pcoeffs));
490 7284 }
491
492 /**
493 * Encode ics_info element.
494 * @see Table 4.6 (syntax of ics_info)
495 */
496 5693 static void put_ics_info(AACEncContext *s, IndividualChannelStream *info)
497 {
498 int w;
499
500 5693 put_bits(&s->pb, 1, 0); // ics_reserved bit
501 5693 put_bits(&s->pb, 2, info->window_sequence[0]);
502 5693 put_bits(&s->pb, 1, info->use_kb_window[0]);
503
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 5693 if (info->window_sequence[0] != EIGHT_SHORT_SEQUENCE) {
504 5513 put_bits(&s->pb, 6, info->max_sfb);
505 5513 put_bits(&s->pb, 1, !!info->predictor_present);
506 } else {
507 180 put_bits(&s->pb, 4, info->max_sfb);
508
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 1440 for (w = 1; w < 8; w++)
509 1260 put_bits(&s->pb, 1, !info->group_len[w]);
510 }
511 5693 }
512
513 /**
514 * Encode MS data.
515 * @see 4.6.8.1 "Joint Coding - M/S Stereo"
516 */
517 4538 static void encode_ms_info(PutBitContext *pb, ChannelElement *cpe)
518 {
519 int i, w;
520
521 4538 put_bits(pb, 2, cpe->ms_mode);
522
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 4538 if (cpe->ms_mode == 1)
523
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 823 for (w = 0; w < cpe->ch[0].ics.num_windows; w += cpe->ch[0].ics.group_len[w])
524
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 19581 for (i = 0; i < cpe->ch[0].ics.max_sfb; i++)
525 19160 put_bits(pb, 1, cpe->ms_mask[w*16 + i]);
526 4538 }
527
528 /**
529 * Produce integer coefficients from scalefactors provided by the model.
530 */
531 5448 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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 15679 for (ch = 0; ch < chans; ch++) {
537 10231 IndividualChannelStream *ics = &cpe->ch[ch].ics;
538 10231 maxsfb = 0;
539 10231 cpe->ch[ch].pulse.num_pulse = 0;
540
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 21114 for (w = 0; w < ics->num_windows; w += ics->group_len[w]) {
541
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 22158 for (cmaxsfb = ics->num_swb; cmaxsfb > 0 && cpe->ch[ch].zeroes[w*16+cmaxsfb-1]; cmaxsfb--)
542 ;
543 10883 maxsfb = FFMAX(maxsfb, cmaxsfb);
544 }
545 10231 ics->max_sfb = maxsfb;
546
547 //adjust zero bands for window groups
548
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 21114 for (w = 0; w < ics->num_windows; w += ics->group_len[w]) {
549
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 498183 for (g = 0; g < ics->max_sfb; g++) {
550 487300 i = 1;
551
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 490475 for (w2 = w; w2 < w + ics->group_len[w]; w2++) {
552
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 487520 if (!cpe->ch[ch].zeroes[w2*16 + g]) {
553 484345 i = 0;
554 484345 break;
555 }
556 }
557 487300 cpe->ch[ch].zeroes[w*16 + g] = i;
558 }
559 }
560 }
561
562
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 5448 if (chans > 1 && cpe->common_window) {
563 4538 IndividualChannelStream *ics0 = &cpe->ch[0].ics;
564 4538 IndividualChannelStream *ics1 = &cpe->ch[1].ics;
565 4538 int msc = 0;
566 4538 ics0->max_sfb = FFMAX(ics0->max_sfb, ics1->max_sfb);
567 4538 ics1->max_sfb = ics0->max_sfb;
568
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 9587 for (w = 0; w < ics0->num_windows*16; w += 16)
569
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 225553 for (i = 0; i < ics0->max_sfb; i++)
570
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 220504 if (cpe->ms_mask[w+i])
571 24406 msc++;
572
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 4538 if (msc == 0 || ics0->max_sfb == 0)
573 3749 cpe->ms_mode = 0;
574 else
575
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 789 cpe->ms_mode = msc < ics0->max_sfb * ics0->num_windows ? 1 : 2;
576 }
577 5448 }
578
579 1334 static void apply_intensity_stereo(ChannelElement *cpe)
580 {
581 int w, w2, g, i;
582 1334 IndividualChannelStream *ics = &cpe->ch[0].ics;
583
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 1334 if (!cpe->common_window)
584 707 return;
585
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 1288 for (w = 0; w < ics->num_windows; w += ics->group_len[w]) {
586
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 1386 for (w2 = 0; w2 < ics->group_len[w]; w2++) {
587 725 int start = (w+w2) * 128;
588
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 32330 for (g = 0; g < ics->num_swb; g++) {
589 31605 int p = -1 + 2 * (cpe->ch[1].band_type[w*16+g] - 14);
590 31605 float scale = cpe->ch[0].is_ener[w*16+g];
591
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 31605 if (!cpe->is_mask[w*16 + g]) {
592 22930 start += ics->swb_sizes[g];
593 22930 continue;
594 }
595
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 8675 if (cpe->ms_mask[w*16 + g])
596 2383 p *= -1;
597
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 300811 for (i = 0; i < ics->swb_sizes[g]; i++) {
598 292136 float sum = (cpe->ch[0].coeffs[start+i] + p*cpe->ch[1].coeffs[start+i])*scale;
599 292136 cpe->ch[0].coeffs[start+i] = sum;
600 292136 cpe->ch[1].coeffs[start+i] = 0.0f;
601 }
602 8675 start += ics->swb_sizes[g];
603 }
604 }
605 }
606 }
607
608 1050 static void apply_mid_side_stereo(ChannelElement *cpe)
609 {
610 int w, w2, g, i;
611 1050 IndividualChannelStream *ics = &cpe->ch[0].ics;
612
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 1050 if (!cpe->common_window)
613 548 return;
614
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 1038 for (w = 0; w < ics->num_windows; w += ics->group_len[w]) {
615
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 1136 for (w2 = 0; w2 < ics->group_len[w]; w2++) {
616 600 int start = (w+w2) * 128;
617
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 26080 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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 25480 if (!cpe->ms_mask[w*16 + g] || cpe->is_mask[w*16 + g]
623
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 22915 || cpe->ch[0].band_type[w*16 + g] >= NOISE_BT
624
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 22915 || cpe->ch[1].band_type[w*16 + g] >= NOISE_BT) {
625 2565 start += ics->swb_sizes[g];
626 2565 continue;
627 }
628
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 484399 for (i = 0; i < ics->swb_sizes[g]; i++) {
629 461484 float L = (cpe->ch[0].coeffs[start+i] + cpe->ch[1].coeffs[start+i]) * 0.5f;
630 461484 float R = L - cpe->ch[1].coeffs[start+i];
631 461484 cpe->ch[0].coeffs[start+i] = L;
632 461484 cpe->ch[1].coeffs[start+i] = R;
633 }
634 22915 start += ics->swb_sizes[g];
635 }
636 }
637 }
638 }
639
640 /**
641 * Encode scalefactor band coding type.
642 */
643 10231 static void encode_band_info(AACEncContext *s, SingleChannelElement *sce)
644 {
645 int w;
646
647
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 10231 if (s->coder->set_special_band_scalefactors)
648 10231 s->coder->set_special_band_scalefactors(s, sce);
649
650
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 21114 for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w])
651 10883 s->coder->encode_window_bands_info(s, sce, w, sce->ics.group_len[w], s->lambda);
652 10231 }
653
654 /**
655 * Encode scalefactors.
656 */
657 10231 static void encode_scale_factors(AVCodecContext *avctx, AACEncContext *s,
658 SingleChannelElement *sce)
659 {
660 10231 int diff, off_sf = sce->sf_idx[0], off_pns = sce->sf_idx[0] - NOISE_OFFSET;
661 10231 int off_is = 0, noise_flag = 1;
662 int i, w;
663
664
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 21114 for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) {
665
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 498188 for (i = 0; i < sce->ics.max_sfb; i++) {
666
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 487305 if (!sce->zeroes[w*16 + i]) {
667
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 476374 if (sce->band_type[w*16 + i] == NOISE_BT) {
668 6375 diff = sce->sf_idx[w*16 + i] - off_pns;
669 6375 off_pns = sce->sf_idx[w*16 + i];
670
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 6375 if (noise_flag-- > 0) {
671 1122 put_bits(&s->pb, NOISE_PRE_BITS, diff + NOISE_PRE);
672 1122 continue;
673 }
674
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 469999 } else if (sce->band_type[w*16 + i] == INTENSITY_BT ||
675
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 463673 sce->band_type[w*16 + i] == INTENSITY_BT2) {
676 8564 diff = sce->sf_idx[w*16 + i] - off_is;
677 8564 off_is = sce->sf_idx[w*16 + i];
678 } else {
679 461435 diff = sce->sf_idx[w*16 + i] - off_sf;
680 461435 off_sf = sce->sf_idx[w*16 + i];
681 }
682 475252 diff += SCALE_DIFF_ZERO;
683
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 475252 av_assert0(diff >= 0 && diff <= 120);
684 475252 put_bits(&s->pb, ff_aac_scalefactor_bits[diff], ff_aac_scalefactor_code[diff]);
685 }
686 }
687 }
688 10231 }
689
690 /**
691 * Encode pulse data.
692 */
693 10231 static void encode_pulses(AACEncContext *s, Pulse *pulse)
694 {
695 int i;
696
697 10231 put_bits(&s->pb, 1, !!pulse->num_pulse);
698
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 10231 if (!pulse->num_pulse)
699 10231 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 10231 static void encode_spectral_coeffs(AACEncContext *s, SingleChannelElement *sce)
713 {
714 int start, i, w, w2;
715
716
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 21114 for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) {
717 10883 start = 0;
718
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 498188 for (i = 0; i < sce->ics.max_sfb; i++) {
719
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 487305 if (sce->zeroes[w*16 + i]) {
720 10931 start += sce->ics.swb_sizes[i];
721 10931 continue;
722 }
723
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 960754 for (w2 = w; w2 < w + sce->ics.group_len[w]; w2++) {
724 484380 s->coder->quantize_and_encode_band(s, &s->pb,
725 484380 &sce->coeffs[start + w2*128],
726 484380 NULL, sce->ics.swb_sizes[i],
727 484380 sce->sf_idx[w*16 + i],
728 484380 sce->band_type[w*16 + i],
729 s->lambda,
730 484380 sce->ics.window_clipping[w]);
731 }
732 476374 start += sce->ics.swb_sizes[i];
733 }
734 }
735 10231 }
736
737 /**
738 * Downscale spectral coefficients for near-clipping windows to avoid artifacts
739 */
740 7284 static void avoid_clipping(AACEncContext *s, SingleChannelElement *sce)
741 {
742 int start, i, j, w;
743
744
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 7284 if (sce->ics.clip_avoidance_factor < 1.0f) {
745
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 392 for (w = 0; w < sce->ics.num_windows; w++) {
746 224 start = 0;
747
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 8690 for (i = 0; i < sce->ics.max_sfb; i++) {
748 8466 float *swb_coeffs = &sce->coeffs[start + w*128];
749
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 168658 for (j = 0; j < sce->ics.swb_sizes[i]; j++)
750 160192 swb_coeffs[j] *= sce->ics.clip_avoidance_factor;
751 8466 start += sce->ics.swb_sizes[i];
752 }
753 }
754 }
755 7284 }
756
757 /**
758 * Encode one channel of audio data.
759 */
760 10231 static int encode_individual_channel(AVCodecContext *avctx, AACEncContext *s,
761 SingleChannelElement *sce,
762 int common_window)
763 {
764 10231 put_bits(&s->pb, 8, sce->sf_idx[0]);
765
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 10231 if (!common_window) {
766 1155 put_ics_info(s, &sce->ics);
767
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 1155 if (s->coder->encode_main_pred)
768 1155 s->coder->encode_main_pred(s, sce);
769
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 1155 if (s->coder->encode_ltp_info)
770 1155 s->coder->encode_ltp_info(s, sce, 0);
771 }
772 10231 encode_band_info(s, sce);
773 10231 encode_scale_factors(avctx, s, sce);
774 10231 encode_pulses(s, &sce->pulse);
775 10231 put_bits(&s->pb, 1, !!sce->tns.present);
776
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 10231 if (s->coder->encode_tns_info)
777 10231 s->coder->encode_tns_info(s, sce);
778 10231 put_bits(&s->pb, 1, 0); //ssr
779 10231 encode_spectral_coeffs(s, sce);
780 10231 return 0;
781 }
782
783 /**
784 * Write some auxiliary information about the created AAC file.
785 */
786 ✗ static void put_bitstream_info(AACEncContext *s, const char *name)
787 {
788 int i, namelen, padbits;
789
790 ✗ namelen = strlen(name) + 2;
791 ✗ put_bits(&s->pb, 3, TYPE_FIL);
792 ✗ put_bits(&s->pb, 4, FFMIN(namelen, 15));
793 ✗ if (namelen >= 15)
794 ✗ put_bits(&s->pb, 8, namelen - 14);
795 ✗ put_bits(&s->pb, 4, 0); //extension type - filler
796 ✗ padbits = -put_bits_count(&s->pb) & 7;
797 ✗ align_put_bits(&s->pb);
798 ✗ for (i = 0; i < namelen - 2; i++)
799 ✗ put_bits(&s->pb, 8, name[i]);
800 ✗ put_bits(&s->pb, 12 - padbits, 0);
801 ✗ }
802
803 /*
804 * Copy input samples.
805 * Channels are reordered from libavcodec's default order to AAC order.
806 */
807 3816 static void copy_input_samples(AACEncContext *s, const AVFrame *frame)
808 {
809 int ch;
810
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 3816 int end = 2048 + (frame ? frame->nb_samples : 0);
811 3816 const uint8_t *channel_map = s->reorder_map;
812
813 /* copy and remap input samples */
814
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 11125 for (ch = 0; ch < s->channels; ch++) {
815 /* copy last 1024 samples of previous frame to the start of the current frame */
816 7309 memcpy(&s->planar_samples[ch][1024], &s->planar_samples[ch][2048], 1024 * sizeof(s->planar_samples[0][0]));
817
818 /* copy new samples and zero any remaining samples */
819
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 7309 if (frame) {
820 7259 memcpy(&s->planar_samples[ch][2048],
821 7259 frame->extended_data[channel_map[ch]],
822 7259 frame->nb_samples * sizeof(s->planar_samples[0][0]));
823 }
824 7309 memset(&s->planar_samples[ch][end], 0,
825 7309 (3072 - end) * sizeof(s->planar_samples[0][0]));
826 }
827 3816 }
828
829 3827 static int aac_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
830 const AVFrame *frame, int *got_packet_ptr)
831 {
832 3827 AACEncContext *s = avctx->priv_data;
833 3827 float **samples = s->planar_samples, *samples2, *la, *overlap;
834 ChannelElement *cpe;
835 SingleChannelElement *sce;
836 IndividualChannelStream *ics;
837 int i, its, ch, w, chans, tag, start_ch, ret, frame_bits;
838 int target_bits, rate_bits, too_many_bits, too_few_bits;
839 3827 int ms_mode = 0, is_mode = 0, tns_mode = 0, pred_mode = 0;
840 int chan_el_counter[4];
841 FFPsyWindowInfo windows[AAC_MAX_CHANNELS];
842
843 /* add current frame to queue */
844
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 3827 if (frame) {
845
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 3794 if ((ret = ff_af_queue_add(&s->afq, frame)) < 0)
846 ✗ return ret;
847 } else {
848
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 33 if (!s->afq.remaining_samples || (!s->afq.frame_alloc && !s->afq.frame_count))
849 11 return 0;
850 }
851
852 3816 copy_input_samples(s, frame);
853
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 3816 if (s->psypp)
854 3816 ff_psy_preprocess(s->psypp, s->planar_samples, s->channels);
855
856
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 3816 if (!avctx->frame_num)
857 11 return 0;
858
859 3805 start_ch = 0;
860
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 7754 for (i = 0; i < s->chan_map[0]; i++) {
861 3949 FFPsyWindowInfo* wi = windows + start_ch;
862 3949 tag = s->chan_map[i+1];
863
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 3949 chans = tag == TYPE_CPE ? 2 : 1;
864 3949 cpe = &s->cpe[i];
865
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 11233 for (ch = 0; ch < chans; ch++) {
866 int k;
867 float clip_avoidance_factor;
868 7284 sce = &cpe->ch[ch];
869 7284 ics = &sce->ics;
870 7284 s->cur_channel = start_ch + ch;
871 7284 overlap = &samples[s->cur_channel][0];
872 7284 samples2 = overlap + 1024;
873 7284 la = samples2 + (448+64);
874
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 7284 if (!frame)
875 50 la = NULL;
876
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 7284 if (tag == TYPE_LFE) {
877 48 wi[ch].window_type[0] = wi[ch].window_type[1] = ONLY_LONG_SEQUENCE;
878 48 wi[ch].window_shape = 0;
879 48 wi[ch].num_windows = 1;
880 48 wi[ch].grouping[0] = 1;
881 48 wi[ch].clipping[0] = 0;
882
883 /* Only the lowest 12 coefficients are used in a LFE channel.
884 * The expression below results in only the bottom 8 coefficients
885 * being used for 11.025kHz to 16kHz sample rates.
886 */
887
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 48 ics->num_swb = s->samplerate_index >= 8 ? 1 : 3;
888 } else {
889 7236 wi[ch] = s->psy.model->window(&s->psy, samples2, la, s->cur_channel,
890 7236 ics->window_sequence[0]);
891 }
892 7284 ics->window_sequence[1] = ics->window_sequence[0];
893 7284 ics->window_sequence[0] = wi[ch].window_type[0];
894 7284 ics->use_kb_window[1] = ics->use_kb_window[0];
895 7284 ics->use_kb_window[0] = wi[ch].window_shape;
896 7284 ics->num_windows = wi[ch].num_windows;
897
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 7284 ics->swb_sizes = s->psy.bands [ics->num_windows == 8];
898
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 7284 ics->num_swb = tag == TYPE_LFE ? ics->num_swb : s->psy.num_bands[ics->num_windows == 8];
899 7284 ics->max_sfb = FFMIN(ics->max_sfb, ics->num_swb);
900 14568 ics->swb_offset = wi[ch].window_type[0] == EIGHT_SHORT_SEQUENCE ?
901
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 7284 ff_swb_offset_128 [s->samplerate_index]:
902 7120 ff_swb_offset_1024[s->samplerate_index];
903 14568 ics->tns_max_bands = wi[ch].window_type[0] == EIGHT_SHORT_SEQUENCE ?
904
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 7284 ff_tns_max_bands_128 [s->samplerate_index]:
905 7120 ff_tns_max_bands_1024[s->samplerate_index];
906
907
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 15716 for (w = 0; w < ics->num_windows; w++)
908 8432 ics->group_len[w] = wi[ch].grouping[w];
909
910 /* Calculate input sample maximums and evaluate clipping risk */
911 7284 clip_avoidance_factor = 0.0f;
912
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 15716 for (w = 0; w < ics->num_windows; w++) {
913 8432 const float *wbuf = overlap + w * 128;
914 8432 const int wlen = 2048 / ics->num_windows;
915 8432 float max = 0;
916 int j;
917 /* mdct input is 2 * output */
918
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 14926064 for (j = 0; j < wlen; j++)
919
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 14917632 max = FFMAX(max, fabsf(wbuf[j]));
920 8432 wi[ch].clipping[w] = max;
921 }
922
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 15716 for (w = 0; w < ics->num_windows; w++) {
923
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 8432 if (wi[ch].clipping[w] > CLIP_AVOIDANCE_FACTOR) {
924 176 ics->window_clipping[w] = 1;
925
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 176 clip_avoidance_factor = FFMAX(clip_avoidance_factor, wi[ch].clipping[w]);
926 } else {
927 8256 ics->window_clipping[w] = 0;
928 }
929 }
930
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 7284 if (clip_avoidance_factor > CLIP_AVOIDANCE_FACTOR) {
931 168 ics->clip_avoidance_factor = CLIP_AVOIDANCE_FACTOR / clip_avoidance_factor;
932 } else {
933 7116 ics->clip_avoidance_factor = 1.0f;
934 }
935
936 7284 apply_window_and_mdct(s, sce, overlap);
937
938
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 7284 if (s->options.ltp && s->coder->update_ltp) {
939 ✗ s->coder->update_ltp(s, sce);
940 ✗ apply_window[sce->ics.window_sequence[0]](s->fdsp, sce, &sce->ltp_state[0]);
941 ✗ s->mdct1024_fn(s->mdct1024, sce->lcoeffs, sce->ret_buf, sizeof(float));
942 }
943
944
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 7466100 for (k = 0; k < 1024; k++) {
945
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 7458816 if (!(fabs(cpe->ch[ch].coeffs[k]) < 1E16)) { // Ensure headroom for energy calculation
946 ✗ av_log(avctx, AV_LOG_ERROR, "Input contains (near) NaN/+-Inf\n");
947 ✗ return AVERROR(EINVAL);
948 }
949 }
950 7284 avoid_clipping(s, sce);
951 }
952 3949 start_ch += chans;
953 }
954
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✓ Branch 2 taken 3805 times.
 3805 if ((ret = ff_alloc_packet(avctx, avpkt, 8192 * s->channels)) < 0)
955 ✗ return ret;
956 3805 frame_bits = its = 0;
957 do {
958 5232 init_put_bits(&s->pb, avpkt->data, avpkt->size);
959
960
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 5232 if ((avctx->frame_num & 0xFF)==1 && !(avctx->flags & AV_CODEC_FLAG_BITEXACT))
961 ✗ put_bitstream_info(s, LIBAVCODEC_IDENT);
962 5232 start_ch = 0;
963 5232 target_bits = 0;
964 5232 memset(chan_el_counter, 0, sizeof(chan_el_counter));
965
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 10680 for (i = 0; i < s->chan_map[0]; i++) {
966 5448 FFPsyWindowInfo* wi = windows + start_ch;
967 const float *coeffs[2];
968 5448 tag = s->chan_map[i+1];
969
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 5448 chans = tag == TYPE_CPE ? 2 : 1;
970 5448 cpe = &s->cpe[i];
971 5448 cpe->common_window = 0;
972 5448 memset(cpe->is_mask, 0, sizeof(cpe->is_mask));
973 5448 memset(cpe->ms_mask, 0, sizeof(cpe->ms_mask));
974 5448 put_bits(&s->pb, 3, tag);
975 5448 put_bits(&s->pb, 4, chan_el_counter[tag]++);
976
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 15679 for (ch = 0; ch < chans; ch++) {
977 10231 sce = &cpe->ch[ch];
978 10231 coeffs[ch] = sce->coeffs;
979 10231 sce->ics.predictor_present = 0;
980 10231 sce->ics.ltp.present = 0;
981 10231 memset(sce->ics.ltp.used, 0, sizeof(sce->ics.ltp.used));
982 10231 memset(sce->ics.prediction_used, 0, sizeof(sce->ics.prediction_used));
983 10231 memset(&sce->tns, 0, sizeof(TemporalNoiseShaping));
984
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 1319799 for (w = 0; w < 128; w++)
985
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 1309568 if (sce->band_type[w] > RESERVED_BT)
986 14871 sce->band_type[w] = 0;
987 }
988 5448 s->psy.bitres.alloc = -1;
989 5448 s->psy.bitres.bits = s->last_frame_pb_count / s->channels;
990 5448 s->psy.model->analyze(&s->psy, start_ch, coeffs, wi);
991
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 5448 if (s->psy.bitres.alloc > 0) {
992 /* Lambda unused here on purpose, we need to take psy's unscaled allocation */
993 10896 target_bits += s->psy.bitres.alloc
994
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✓ Branch 1 taken 5448 times.
 5448 * (s->lambda / (avctx->global_quality ? avctx->global_quality : 120));
995 5448 s->psy.bitres.alloc /= chans;
996 }
997 5448 s->cur_type = tag;
998
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 15679 for (ch = 0; ch < chans; ch++) {
999 10231 s->cur_channel = start_ch + ch;
1000
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 10231 if (s->options.pns && s->coder->mark_pns)
1001 2003 s->coder->mark_pns(s, avctx, &cpe->ch[ch]);
1002 10231 s->coder->search_for_quantizers(avctx, s, &cpe->ch[ch], s->lambda);
1003 }
1004
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✓ Branch 1 taken 665 times.
 5448 if (chans > 1
1005
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✓ Branch 1 taken 236 times.
 4783 && wi[0].window_type[0] == wi[1].window_type[0]
1006
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 4547 && wi[0].window_shape == wi[1].window_shape) {
1007
1008 4547 cpe->common_window = 1;
1009
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 9596 for (w = 0; w < wi[0].num_windows; w++) {
1010
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 5058 if (wi[0].grouping[w] != wi[1].grouping[w]) {
1011 9 cpe->common_window = 0;
1012 9 break;
1013 }
1014 }
1015 }
1016
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 15679 for (ch = 0; ch < chans; ch++) { /* TNS and PNS */
1017 10231 sce = &cpe->ch[ch];
1018 10231 s->cur_channel = start_ch + ch;
1019
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 10231 if (s->options.tns && s->coder->search_for_tns)
1020 2003 s->coder->search_for_tns(s, sce);
1021
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 10231 if (s->options.tns && s->coder->apply_tns_filt)
1022 2003 s->coder->apply_tns_filt(s, sce);
1023
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 10231 if (sce->tns.present)
1024 40 tns_mode = 1;
1025
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 10231 if (s->options.pns && s->coder->search_for_pns)
1026 2003 s->coder->search_for_pns(s, avctx, sce);
1027 }
1028 5448 s->cur_channel = start_ch;
1029
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 5448 if (s->options.intensity_stereo) { /* Intensity Stereo */
1030
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 1334 if (s->coder->search_for_is)
1031 1334 s->coder->search_for_is(s, avctx, cpe);
1032
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 1334 if (cpe->is_mode) is_mode = 1;
1033 1334 apply_intensity_stereo(cpe);
1034 }
1035
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 5448 if (s->options.pred) { /* Prediction */
1036
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 1248 for (ch = 0; ch < chans; ch++) {
1037 832 sce = &cpe->ch[ch];
1038 832 s->cur_channel = start_ch + ch;
1039
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 832 if (s->options.pred && s->coder->search_for_pred)
1040 832 s->coder->search_for_pred(s, sce);
1041
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 832 if (cpe->ch[ch].ics.predictor_present) pred_mode = 1;
1042 }
1043
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 416 if (s->coder->adjust_common_pred)
1044 416 s->coder->adjust_common_pred(s, cpe);
1045
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 1248 for (ch = 0; ch < chans; ch++) {
1046 832 sce = &cpe->ch[ch];
1047 832 s->cur_channel = start_ch + ch;
1048
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 832 if (s->options.pred && s->coder->apply_main_pred)
1049 832 s->coder->apply_main_pred(s, sce);
1050 }
1051 416 s->cur_channel = start_ch;
1052 }
1053
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 5448 if (s->options.mid_side) { /* Mid/Side stereo */
1054
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 1050 if (s->options.mid_side == -1 && s->coder->search_for_ms)
1055 630 s->coder->search_for_ms(s, cpe);
1056
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 420 else if (cpe->common_window)
1057 393 memset(cpe->ms_mask, 1, sizeof(cpe->ms_mask));
1058 1050 apply_mid_side_stereo(cpe);
1059 }
1060 5448 adjust_frame_information(cpe, chans);
1061
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 5448 if (s->options.ltp) { /* LTP */
1062 ✗ for (ch = 0; ch < chans; ch++) {
1063 ✗ sce = &cpe->ch[ch];
1064 ✗ s->cur_channel = start_ch + ch;
1065 ✗ if (s->coder->search_for_ltp)
1066 ✗ s->coder->search_for_ltp(s, sce, cpe->common_window);
1067 ✗ if (sce->ics.ltp.present) pred_mode = 1;
1068 }
1069 ✗ s->cur_channel = start_ch;
1070 ✗ if (s->coder->adjust_common_ltp)
1071 ✗ s->coder->adjust_common_ltp(s, cpe);
1072 }
1073
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 5448 if (chans == 2) {
1074 4783 put_bits(&s->pb, 1, cpe->common_window);
1075
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 4783 if (cpe->common_window) {
1076 4538 put_ics_info(s, &cpe->ch[0].ics);
1077
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 4538 if (s->coder->encode_main_pred)
1078 4538 s->coder->encode_main_pred(s, &cpe->ch[0]);
1079
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 4538 if (s->coder->encode_ltp_info)
1080 4538 s->coder->encode_ltp_info(s, &cpe->ch[0], 1);
1081 4538 encode_ms_info(&s->pb, cpe);
1082
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 4538 if (cpe->ms_mode) ms_mode = 1;
1083 }
1084 }
1085
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 15679 for (ch = 0; ch < chans; ch++) {
1086 10231 s->cur_channel = start_ch + ch;
1087 10231 encode_individual_channel(avctx, s, &cpe->ch[ch], cpe->common_window);
1088 }
1089 5448 start_ch += chans;
1090 }
1091
1092
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 5232 if (avctx->flags & AV_CODEC_FLAG_QSCALE) {
1093 /* When using a constant Q-scale, don't mess with lambda */
1094 ✗ break;
1095 }
1096
1097 /* rate control stuff
1098 * allow between the nominal bitrate, and what psy's bit reservoir says to target
1099 * but drift towards the nominal bitrate always
1100 */
1101 5232 frame_bits = put_bits_count(&s->pb);
1102 5232 rate_bits = avctx->bit_rate * 1024 / avctx->sample_rate;
1103
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 5232 rate_bits = FFMIN(rate_bits, 6144 * s->channels - 3);
1104 5232 too_many_bits = FFMAX(target_bits, rate_bits);
1105
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 5232 too_many_bits = FFMIN(too_many_bits, 6144 * s->channels - 3);
1106 5232 too_few_bits = FFMIN(FFMAX(rate_bits - rate_bits/4, target_bits), too_many_bits);
1107
1108 /* When strict bit-rate control is demanded */
1109
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 5232 if (avctx->bit_rate_tolerance == 0) {
1110 ✗ if (rate_bits < frame_bits) {
1111 ✗ float ratio = ((float)rate_bits) / frame_bits;
1112 ✗ s->lambda *= FFMIN(0.9f, ratio);
1113 ✗ continue;
1114 }
1115 /* reset lambda when solution is found */
1116 ✗ s->lambda = avctx->global_quality > 0 ? avctx->global_quality : 120;
1117 ✗ break;
1118 }
1119
1120 /* When using ABR, be strict (but only for increasing) */
1121 5232 too_few_bits = too_few_bits - too_few_bits/8;
1122 5232 too_many_bits = too_many_bits + too_many_bits/2;
1123
1124
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 5232 if ( its == 0 /* for steady-state Q-scale tracking */
1125
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 1427 || (its < 5 && (frame_bits < too_few_bits || frame_bits > too_many_bits))
1126
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 289 || frame_bits >= 6144 * s->channels - 3 )
1127 {
1128 4943 float ratio = ((float)rate_bits) / frame_bits;
1129
1130
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 4943 if (frame_bits >= too_few_bits && frame_bits <= too_many_bits) {
1131 /*
1132 * This path is for steady-state Q-scale tracking
1133 * When frame bits fall within the stable range, we still need to adjust
1134 * lambda to maintain it like so in a stable fashion (large jumps in lambda
1135 * create artifacts and should be avoided), but slowly
1136 */
1137 2925 ratio = sqrtf(sqrtf(ratio));
1138 2925 ratio = av_clipf(ratio, 0.9f, 1.1f);
1139 } else {
1140 /* Not so fast though */
1141 2018 ratio = sqrtf(ratio);
1142 }
1143 4943 s->lambda = av_clipf(s->lambda * ratio, FLT_EPSILON, 65536.f);
1144
1145 /* Keep iterating if we must reduce and lambda is in the sky */
1146
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 4943 if (ratio > 0.9f && ratio < 1.1f) {
1147 break;
1148 } else {
1149
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 1427 if (is_mode || ms_mode || tns_mode || pred_mode) {
1150
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 45 for (i = 0; i < s->chan_map[0]; i++) {
1151 // Must restore coeffs
1152
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 30 chans = tag == TYPE_CPE ? 2 : 1;
1153 30 cpe = &s->cpe[i];
1154
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 70 for (ch = 0; ch < chans; ch++)
1155 40 memcpy(cpe->ch[ch].coeffs, cpe->ch[ch].pcoeffs, sizeof(cpe->ch[ch].coeffs));
1156 }
1157 }
1158 1427 its++;
1159 }
1160 } else {
1161 break;
1162 }
1163 } while (1);
1164
1165
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 3805 if (s->options.ltp && s->coder->ltp_insert_new_frame)
1166 ✗ s->coder->ltp_insert_new_frame(s);
1167
1168 3805 put_bits(&s->pb, 3, TYPE_END);
1169 3805 flush_put_bits(&s->pb);
1170
1171 3805 s->last_frame_pb_count = put_bits_count(&s->pb);
1172 3805 avpkt->size = put_bytes_output(&s->pb);
1173
1174 3805 s->lambda_sum += s->lambda;
1175 3805 s->lambda_count++;
1176
1177 3805 ff_af_queue_remove(&s->afq, avctx->frame_size, &avpkt->pts,
1178 &avpkt->duration);
1179
1180 3805 *got_packet_ptr = 1;
1181 3805 return 0;
1182 }
1183
1184 11 static av_cold int aac_encode_end(AVCodecContext *avctx)
1185 {
1186 11 AACEncContext *s = avctx->priv_data;
1187
1188
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 11 av_log(avctx, AV_LOG_INFO, "Qavg: %.3f\n", s->lambda_count ? s->lambda_sum / s->lambda_count : NAN);
1189
1190 11 av_tx_uninit(&s->mdct1024);
1191 11 av_tx_uninit(&s->mdct128);
1192 11 ff_psy_end(&s->psy);
1193 11 ff_lpc_end(&s->lpc);
1194
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 11 if (s->psypp)
1195 11 ff_psy_preprocess_end(s->psypp);
1196 11 av_freep(&s->buffer.samples);
1197 11 av_freep(&s->cpe);
1198 11 av_freep(&s->fdsp);
1199 11 ff_af_queue_close(&s->afq);
1200 11 return 0;
1201 }
1202
1203 11 static av_cold int dsp_init(AVCodecContext *avctx, AACEncContext *s)
1204 {
1205 11 int ret = 0;
1206 11 float scale = 32768.0f;
1207
1208 11 s->fdsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT);
1209
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 11 if (!s->fdsp)
1210 ✗ return AVERROR(ENOMEM);
1211
1212
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 11 if ((ret = av_tx_init(&s->mdct1024, &s->mdct1024_fn, AV_TX_FLOAT_MDCT, 0,
1213 1024, &scale, 0)) < 0)
1214 ✗ return ret;
1215
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 11 if ((ret = av_tx_init(&s->mdct128, &s->mdct128_fn, AV_TX_FLOAT_MDCT, 0,
1216 128, &scale, 0)) < 0)
1217 ✗ return ret;
1218
1219 11 return 0;
1220 }
1221
1222 11 static av_cold int alloc_buffers(AVCodecContext *avctx, AACEncContext *s)
1223 {
1224 int ch;
1225
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 11 if (!FF_ALLOCZ_TYPED_ARRAY(s->buffer.samples, s->channels * 3 * 1024) ||
1226
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 11 !FF_ALLOCZ_TYPED_ARRAY(s->cpe, s->chan_map[0]))
1227 ✗ return AVERROR(ENOMEM);
1228
1229
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 36 for(ch = 0; ch < s->channels; ch++)
1230 25 s->planar_samples[ch] = s->buffer.samples + 3 * 1024 * ch;
1231
1232 11 return 0;
1233 }
1234
1235 11 static av_cold int aac_encode_init(AVCodecContext *avctx)
1236 {
1237 11 AACEncContext *s = avctx->priv_data;
1238 11 int i, ret = 0;
1239 const uint8_t *sizes[2];
1240 uint8_t grouping[AAC_MAX_CHANNELS];
1241 int lengths[2];
1242
1243 /* Constants */
1244 11 s->last_frame_pb_count = 0;
1245 11 avctx->frame_size = 1024;
1246 11 avctx->initial_padding = 1024;
1247
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 11 s->lambda = avctx->global_quality > 0 ? avctx->global_quality : 120;
1248
1249 /* Channel map and unspecified bitrate guessing */
1250 11 s->channels = avctx->ch_layout.nb_channels;
1251
1252 11 s->needs_pce = 1;
1253
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 25 for (i = 0; i < FF_ARRAY_ELEMS(aac_normal_chan_layouts); i++) {
1254
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 25 if (!av_channel_layout_compare(&avctx->ch_layout, &aac_normal_chan_layouts[i])) {
1255 11 s->needs_pce = s->options.pce;
1256 11 break;
1257 }
1258 }
1259
1260
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 11 if (s->needs_pce) {
1261 char buf[64];
1262 ✗ for (i = 0; i < FF_ARRAY_ELEMS(aac_pce_configs); i++)
1263 ✗ if (!av_channel_layout_compare(&avctx->ch_layout, &aac_pce_configs[i].layout))
1264 ✗ break;
1265 ✗ av_channel_layout_describe(&avctx->ch_layout, buf, sizeof(buf));
1266 ✗ if (i == FF_ARRAY_ELEMS(aac_pce_configs)) {
1267 ✗ av_log(avctx, AV_LOG_ERROR, "Unsupported channel layout \"%s\"\n", buf);
1268 ✗ return AVERROR(EINVAL);
1269 }
1270 ✗ av_log(avctx, AV_LOG_INFO, "Using a PCE to encode channel layout \"%s\"\n", buf);
1271 ✗ s->pce = aac_pce_configs[i];
1272 ✗ s->reorder_map = s->pce.reorder_map;
1273 ✗ s->chan_map = s->pce.config_map;
1274 } else {
1275 11 s->reorder_map = aac_chan_maps[s->channels - 1];
1276 11 s->chan_map = aac_chan_configs[s->channels - 1];
1277 }
1278
1279
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 11 if (!avctx->bit_rate) {
1280
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 9 for (i = 1; i <= s->chan_map[0]; i++) {
1281
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 9 avctx->bit_rate += s->chan_map[i] == TYPE_CPE ? 128000 : /* Pair */
1282
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 3 s->chan_map[i] == TYPE_LFE ? 16000 : /* LFE */
1283 69000 ; /* SCE */
1284 }
1285 }
1286
1287 /* Samplerate */
1288
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 54 for (i = 0; i < 16; i++)
1289
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 54 if (avctx->sample_rate == ff_mpeg4audio_sample_rates[i])
1290 11 break;
1291 11 s->samplerate_index = i;
1292
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 11 ERROR_IF(s->samplerate_index == 16 ||
1293 s->samplerate_index >= ff_aac_swb_size_1024_len ||
1294 s->samplerate_index >= ff_aac_swb_size_128_len,
1295 "Unsupported sample rate %d\n", avctx->sample_rate);
1296
1297 /* Bitrate limiting */
1298
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 11 WARN_IF(1024.0 * avctx->bit_rate / avctx->sample_rate > 6144 * s->channels,
1299 "Too many bits %f > %d per frame requested, clamping to max\n",
1300 1024.0 * avctx->bit_rate / avctx->sample_rate,
1301 6144 * s->channels);
1302
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 11 avctx->bit_rate = (int64_t)FFMIN(6144 * s->channels / 1024.0 * avctx->sample_rate,
1303 avctx->bit_rate);
1304
1305 /* Profile and option setting */
1306
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 11 avctx->profile = avctx->profile == AV_PROFILE_UNKNOWN ? AV_PROFILE_AAC_LOW :
1307 avctx->profile;
1308
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 21 for (i = 0; i < FF_ARRAY_ELEMS(aacenc_profiles); i++)
1309
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 21 if (avctx->profile == aacenc_profiles[i])
1310 11 break;
1311
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 11 if (avctx->profile == AV_PROFILE_MPEG2_AAC_LOW) {
1312 ✗ avctx->profile = AV_PROFILE_AAC_LOW;
1313 ✗ ERROR_IF(s->options.pred,
1314 "Main prediction unavailable in the \"mpeg2_aac_low\" profile\n");
1315 ✗ ERROR_IF(s->options.ltp,
1316 "LTP prediction unavailable in the \"mpeg2_aac_low\" profile\n");
1317 ✗ WARN_IF(s->options.pns,
1318 "PNS unavailable in the \"mpeg2_aac_low\" profile, turning off\n");
1319 ✗ s->options.pns = 0;
1320
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 11 } else if (avctx->profile == AV_PROFILE_AAC_LTP) {
1321 ✗ s->options.ltp = 1;
1322 ✗ ERROR_IF(s->options.pred,
1323 "Main prediction unavailable in the \"aac_ltp\" profile\n");
1324
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 11 } else if (avctx->profile == AV_PROFILE_AAC_MAIN) {
1325 1 s->options.pred = 1;
1326
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 1 ERROR_IF(s->options.ltp,
1327 "LTP prediction unavailable in the \"aac_main\" profile\n");
1328
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 10 } else if (s->options.ltp) {
1329 ✗ avctx->profile = AV_PROFILE_AAC_LTP;
1330 ✗ WARN_IF(1,
1331 "Chainging profile to \"aac_ltp\"\n");
1332 ✗ ERROR_IF(s->options.pred,
1333 "Main prediction unavailable in the \"aac_ltp\" profile\n");
1334
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 10 } else if (s->options.pred) {
1335 ✗ avctx->profile = AV_PROFILE_AAC_MAIN;
1336 ✗ WARN_IF(1,
1337 "Chainging profile to \"aac_main\"\n");
1338 ✗ ERROR_IF(s->options.ltp,
1339 "LTP prediction unavailable in the \"aac_main\" profile\n");
1340 }
1341 11 s->profile = avctx->profile;
1342
1343 /* Coder limitations */
1344 11 s->coder = &ff_aac_coders[s->options.coder];
1345
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 11 if (s->options.coder == AAC_CODER_ANMR) {
1346 ✗ ERROR_IF(avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL,
1347 "The ANMR coder is considered experimental, add -strict -2 to enable!\n");
1348 ✗ s->options.intensity_stereo = 0;
1349 ✗ s->options.pns = 0;
1350 }
1351
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 11 ERROR_IF(s->options.ltp && avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL,
1352 "The LPT profile requires experimental compliance, add -strict -2 to enable!\n");
1353
1354 /* M/S introduces horrible artifacts with multichannel files, this is temporary */
1355
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 11 if (s->channels > 3)
1356 1 s->options.mid_side = 0;
1357
1358 // Initialize static tables
1359 11 ff_aac_float_common_init();
1360
1361
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 11 if ((ret = dsp_init(avctx, s)) < 0)
1362 ✗ return ret;
1363
1364
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 11 if ((ret = alloc_buffers(avctx, s)) < 0)
1365 ✗ return ret;
1366
1367
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 11 if ((ret = put_audio_specific_config(avctx)))
1368 ✗ return ret;
1369
1370 11 sizes[0] = ff_aac_swb_size_1024[s->samplerate_index];
1371 11 sizes[1] = ff_aac_swb_size_128[s->samplerate_index];
1372 11 lengths[0] = ff_aac_num_swb_1024[s->samplerate_index];
1373 11 lengths[1] = ff_aac_num_swb_128[s->samplerate_index];
1374
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 25 for (i = 0; i < s->chan_map[0]; i++)
1375 14 grouping[i] = s->chan_map[i + 1] == TYPE_CPE;
1376
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 11 if ((ret = ff_psy_init(&s->psy, avctx, 2, sizes, lengths,
1377 11 s->chan_map[0], grouping)) < 0)
1378 ✗ return ret;
1379 11 s->psypp = ff_psy_preprocess_init(avctx);
1380 11 ff_lpc_init(&s->lpc, 2*avctx->frame_size, TNS_MAX_ORDER, FF_LPC_TYPE_LEVINSON);
1381 11 s->random_state = 0x1f2e3d4c;
1382
1383 11 ff_aacenc_dsp_init(&s->aacdsp);
1384
1385 11 ff_af_queue_init(avctx, &s->afq);
1386
1387 11 return 0;
1388 }
1389
1390 #define AACENC_FLAGS AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM
1391 static const AVOption aacenc_options[] = {
1392 {"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"},
1393 {"anmr", "ANMR method", 0, AV_OPT_TYPE_CONST, {.i64 = AAC_CODER_ANMR}, INT_MIN, INT_MAX, AACENC_FLAGS, .unit = "coder"},
1394 {"twoloop", "Two loop searching method", 0, AV_OPT_TYPE_CONST, {.i64 = AAC_CODER_TWOLOOP}, INT_MIN, INT_MAX, AACENC_FLAGS, .unit = "coder"},
1395 {"fast", "Fast search", 0, AV_OPT_TYPE_CONST, {.i64 = AAC_CODER_FAST}, INT_MIN, INT_MAX, AACENC_FLAGS, .unit = "coder"},
1396 {"aac_ms", "Force M/S stereo coding", offsetof(AACEncContext, options.mid_side), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, AACENC_FLAGS},
1397 {"aac_is", "Intensity stereo coding", offsetof(AACEncContext, options.intensity_stereo), AV_OPT_TYPE_BOOL, {.i64 = 1}, -1, 1, AACENC_FLAGS},
1398 {"aac_pns", "Perceptual noise substitution", offsetof(AACEncContext, options.pns), AV_OPT_TYPE_BOOL, {.i64 = 1}, -1, 1, AACENC_FLAGS},
1399 {"aac_tns", "Temporal noise shaping", offsetof(AACEncContext, options.tns), AV_OPT_TYPE_BOOL, {.i64 = 1}, -1, 1, AACENC_FLAGS},
1400 {"aac_ltp", "Long term prediction", offsetof(AACEncContext, options.ltp), AV_OPT_TYPE_BOOL, {.i64 = 0}, -1, 1, AACENC_FLAGS},
1401 {"aac_pred", "AAC-Main prediction", offsetof(AACEncContext, options.pred), AV_OPT_TYPE_BOOL, {.i64 = 0}, -1, 1, AACENC_FLAGS},
1402 {"aac_pce", "Forces the use of PCEs", offsetof(AACEncContext, options.pce), AV_OPT_TYPE_BOOL, {.i64 = 0}, -1, 1, AACENC_FLAGS},
1403 FF_AAC_PROFILE_OPTS
1404 {NULL}
1405 };
1406
1407 static const AVClass aacenc_class = {
1408 .class_name = "AAC encoder",
1409 .item_name = av_default_item_name,
1410 .option = aacenc_options,
1411 .version = LIBAVUTIL_VERSION_INT,
1412 };
1413
1414 static const FFCodecDefault aac_encode_defaults[] = {
1415 { "b", "0" },
1416 { NULL }
1417 };
1418
1419 const FFCodec ff_aac_encoder = {
1420 .p.name = "aac",
1421 CODEC_LONG_NAME("AAC (Advanced Audio Coding)"),
1422 .p.type = AVMEDIA_TYPE_AUDIO,
1423 .p.id = AV_CODEC_ID_AAC,
1424 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |
1425 AV_CODEC_CAP_SMALL_LAST_FRAME,
1426 .priv_data_size = sizeof(AACEncContext),
1427 .init = aac_encode_init,
1428 FF_CODEC_ENCODE_CB(aac_encode_frame),
1429 .close = aac_encode_end,
1430 .defaults = aac_encode_defaults,
1431 .p.supported_samplerates = ff_mpeg4audio_sample_rates,
1432 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1433 .p.sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_FLTP,
1434 AV_SAMPLE_FMT_NONE },
1435 .p.priv_class = &aacenc_class,
1436 };
1437