FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/aac/aacdec.c
Date: 2024-10-04 17:46:48
Exec Total Coverage
Lines: 969 1332 72.7%
Functions: 44 46 95.7%
Branches: 628 993 63.2%
Line Branch Exec Source
1 /*
2 * Common parts of the AAC decoders
3 * Copyright (c) 2005-2006 Oded Shimon ( ods15 ods15 dyndns org )
4 * Copyright (c) 2006-2007 Maxim Gavrilov ( maxim.gavrilov gmail com )
5 * Copyright (c) 2008-2013 Alex Converse <alex.converse@gmail.com>
6 *
7 * AAC LATM decoder
8 * Copyright (c) 2008-2010 Paul Kendall <paul@kcbbs.gen.nz>
9 * Copyright (c) 2010 Janne Grunau <janne-libav@jannau.net>
10 *
11 * AAC decoder fixed-point implementation
12 * Copyright (c) 2013
13 * MIPS Technologies, Inc., California.
14 *
15 * This file is part of FFmpeg.
16 *
17 * FFmpeg is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU Lesser General Public
19 * License as published by the Free Software Foundation; either
20 * version 2.1 of the License, or (at your option) any later version.
21 *
22 * FFmpeg is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
25 * Lesser General Public License for more details.
26 *
27 * You should have received a copy of the GNU Lesser General Public
28 * License along with FFmpeg; if not, write to the Free Software
29 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
30 */
31
32 /* We use several quantization functions here (Q31, Q30),
33 * for which we need this to be defined for them to work as expected. */
34 #define USE_FIXED 1
35
36 #include "config_components.h"
37
38 #include <limits.h>
39 #include <stddef.h>
40
41 #include "aacdec.h"
42 #include "aacdec_tab.h"
43 #include "aacdec_usac.h"
44
45 #include "libavcodec/aac.h"
46 #include "libavcodec/aac_defines.h"
47 #include "libavcodec/aacsbr.h"
48 #include "libavcodec/aactab.h"
49 #include "libavcodec/adts_header.h"
50
51 #include "libavcodec/avcodec.h"
52 #include "libavcodec/internal.h"
53 #include "libavcodec/codec_internal.h"
54 #include "libavcodec/decode.h"
55 #include "libavcodec/profiles.h"
56
57 #include "libavutil/attributes.h"
58 #include "libavutil/error.h"
59 #include "libavutil/log.h"
60 #include "libavutil/macros.h"
61 #include "libavutil/mem.h"
62 #include "libavutil/opt.h"
63 #include "libavutil/tx.h"
64 #include "libavutil/version.h"
65
66 /*
67 * supported tools
68 *
69 * Support? Name
70 * N (code in SoC repo) gain control
71 * Y block switching
72 * Y window shapes - standard
73 * N window shapes - Low Delay
74 * Y filterbank - standard
75 * N (code in SoC repo) filterbank - Scalable Sample Rate
76 * Y Temporal Noise Shaping
77 * Y Long Term Prediction
78 * Y intensity stereo
79 * Y channel coupling
80 * Y frequency domain prediction
81 * Y Perceptual Noise Substitution
82 * Y Mid/Side stereo
83 * N Scalable Inverse AAC Quantization
84 * N Frequency Selective Switch
85 * N upsampling filter
86 * Y quantization & coding - AAC
87 * N quantization & coding - TwinVQ
88 * N quantization & coding - BSAC
89 * N AAC Error Resilience tools
90 * N Error Resilience payload syntax
91 * N Error Protection tool
92 * N CELP
93 * N Silence Compression
94 * N HVXC
95 * N HVXC 4kbits/s VR
96 * N Structured Audio tools
97 * N Structured Audio Sample Bank Format
98 * N MIDI
99 * N Harmonic and Individual Lines plus Noise
100 * N Text-To-Speech Interface
101 * Y Spectral Band Replication
102 * Y (not in this code) Layer-1
103 * Y (not in this code) Layer-2
104 * Y (not in this code) Layer-3
105 * N SinuSoidal Coding (Transient, Sinusoid, Noise)
106 * Y Parametric Stereo
107 * N Direct Stream Transfer
108 * Y (not in fixed point code) Enhanced AAC Low Delay (ER AAC ELD)
109 *
110 * Note: - HE AAC v1 comprises LC AAC with Spectral Band Replication.
111 * - HE AAC v2 comprises LC AAC with Spectral Band Replication and
112 Parametric Stereo.
113 */
114
115 #define overread_err "Input buffer exhausted before END element found\n"
116
117 552 static int count_channels(uint8_t (*layout)[3], int tags)
118 {
119 552 int i, sum = 0;
120
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 1666 for (i = 0; i < tags; i++) {
121 1114 int syn_ele = layout[i][0];
122 1114 int pos = layout[i][2];
123
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 2228 sum += (1 + (syn_ele == TYPE_CPE)) *
124
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 1114 (pos != AAC_CHANNEL_OFF && pos != AAC_CHANNEL_CC);
125 }
126 552 return sum;
127 }
128
129 /**
130 * Check for the channel element in the current channel position configuration.
131 * If it exists, make sure the appropriate element is allocated and map the
132 * channel order to match the internal FFmpeg channel layout.
133 *
134 * @param che_pos current channel position configuration
135 * @param type channel element type
136 * @param id channel element id
137 * @param channels count of the number of channels in the configuration
138 *
139 * @return Returns error status. 0 - OK, !0 - error
140 */
141 8495 static av_cold int che_configure(AACDecContext *ac,
142 enum ChannelPosition che_pos,
143 int type, int id, int *channels)
144 {
145
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 8495 if (*channels >= MAX_CHANNELS)
146 ✗ return AVERROR_INVALIDDATA;
147
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 8495 if (che_pos) {
148
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 8495 if (!ac->che[type][id]) {
149 376 int ret = ac->proc.sbr_ctx_alloc_init(ac, &ac->che[type][id], type);
150
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 376 if (ret < 0)
151 ✗ return ret;
152 }
153
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 8495 if (type != TYPE_CCE) {
154
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 8487 if (*channels >= MAX_CHANNELS - (type == TYPE_CPE || (type == TYPE_SCE && ac->oc[1].m4ac.ps == 1))) {
155 ✗ av_log(ac->avctx, AV_LOG_ERROR, "Too many channels\n");
156 ✗ return AVERROR_INVALIDDATA;
157 }
158 8487 ac->output_element[(*channels)++] = &ac->che[type][id]->ch[0];
159
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 8487 if (type == TYPE_CPE ||
160
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 775 (type == TYPE_SCE && ac->oc[1].m4ac.ps == 1)) {
161 8011 ac->output_element[(*channels)++] = &ac->che[type][id]->ch[1];
162 }
163 }
164 } else {
165 ✗ if (ac->che[type][id]) {
166 ✗ ac->proc.sbr_ctx_close(ac->che[type][id]);
167 }
168 ✗ av_freep(&ac->che[type][id]);
169 ✗ memset(ac->output_element, 0, sizeof(ac->output_element));
170 }
171 8495 return 0;
172 }
173
174 54000 static int frame_configure_elements(AVCodecContext *avctx)
175 {
176 54000 AACDecContext *ac = avctx->priv_data;
177 int type, id, ch, ret;
178
179 /* set channel pointers to internal buffers by default */
180
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 270000 for (type = 0; type < 4; type++) {
181
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 14040000 for (id = 0; id < MAX_ELEM_ID; id++) {
182 13824000 ChannelElement *che = ac->che[type][id];
183
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 13824000 if (che) {
184 67380 che->ch[0].output = che->ch[0].ret_buf;
185 67380 che->ch[1].output = che->ch[1].ret_buf;
186 }
187 }
188 }
189
190 /* get output buffer */
191 54000 av_frame_unref(ac->frame);
192
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 54000 if (!avctx->ch_layout.nb_channels)
193 ✗ return 1;
194
195 54000 ac->frame->nb_samples = 2048;
196
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 54000 if ((ret = ff_get_buffer(avctx, ac->frame, 0)) < 0)
197 ✗ return ret;
198
199 /* map output channel pointers to AVFrame data */
200
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 156541 for (ch = 0; ch < avctx->ch_layout.nb_channels; ch++) {
201
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 102541 if (ac->output_element[ch])
202 102541 ac->output_element[ch]->output = (void *)ac->frame->extended_data[ch];
203 }
204
205 54000 return 0;
206 }
207
208 struct elem_to_channel {
209 uint64_t av_position;
210 uint8_t syn_ele;
211 uint8_t elem_id;
212 uint8_t aac_position;
213 };
214
215 7649 static int assign_pair(struct elem_to_channel e2c_vec[MAX_ELEM_ID],
216 uint8_t (*layout_map)[3], int offset, uint64_t left,
217 uint64_t right, int pos, uint64_t *layout)
218 {
219
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 7649 if (layout_map[offset][0] == TYPE_CPE) {
220 7645 e2c_vec[offset] = (struct elem_to_channel) {
221 7645 .av_position = left | right,
222 .syn_ele = TYPE_CPE,
223 7645 .elem_id = layout_map[offset][1],
224 .aac_position = pos
225 };
226
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 7645 if (e2c_vec[offset].av_position != UINT64_MAX)
227 7645 *layout |= e2c_vec[offset].av_position;
228
229 7645 return 1;
230 } else {
231 4 e2c_vec[offset] = (struct elem_to_channel) {
232 .av_position = left,
233 .syn_ele = TYPE_SCE,
234 4 .elem_id = layout_map[offset][1],
235 .aac_position = pos
236 };
237 4 e2c_vec[offset + 1] = (struct elem_to_channel) {
238 .av_position = right,
239 .syn_ele = TYPE_SCE,
240 4 .elem_id = layout_map[offset + 1][1],
241 .aac_position = pos
242 };
243
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 4 if (left != UINT64_MAX)
244 4 *layout |= left;
245
246
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 4 if (right != UINT64_MAX)
247 4 *layout |= right;
248
249 4 return 2;
250 }
251 }
252
253 33176 static int count_paired_channels(uint8_t (*layout_map)[3], int tags, int pos,
254 int current)
255 {
256 33176 int num_pos_channels = 0;
257 33176 int first_cpe = 0;
258 33176 int sce_parity = 0;
259 int i;
260
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 41663 for (i = current; i < tags; i++) {
261
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 8760 if (layout_map[i][2] != pos)
262 273 break;
263
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 8487 if (layout_map[i][0] == TYPE_CPE) {
264
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 7645 if (sce_parity) {
265
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 71 if (pos == AAC_CHANNEL_FRONT && !first_cpe) {
266 71 sce_parity = 0;
267 } else {
268 ✗ return -1;
269 }
270 }
271 7645 num_pos_channels += 2;
272 7645 first_cpe = 1;
273 } else {
274 842 num_pos_channels++;
275 842 sce_parity ^= (pos != AAC_CHANNEL_LFE);
276 }
277 }
278
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 33176 if (sce_parity &&
279
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 696 (pos == AAC_CHANNEL_FRONT && first_cpe))
280 ✗ return -1;
281
282 33176 return num_pos_channels;
283 }
284
285 33176 static int assign_channels(struct elem_to_channel e2c_vec[MAX_ELEM_ID], uint8_t (*layout_map)[3],
286 uint64_t *layout, int tags, int layer, int pos, int *current)
287 {
288 33176 int i = *current, j = 0;
289 33176 int nb_channels = count_paired_channels(layout_map, tags, pos, i);
290
291
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 33176 if (nb_channels < 0 || nb_channels > 5)
292 ✗ return 0;
293
294
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 33176 if (pos == AAC_CHANNEL_LFE) {
295
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 8361 while (nb_channels) {
296
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 67 if (ff_aac_channel_map[layer][pos - 1][j] == AV_CHAN_NONE)
297 ✗ return -1;
298 67 e2c_vec[i] = (struct elem_to_channel) {
299 67 .av_position = 1ULL << ff_aac_channel_map[layer][pos - 1][j],
300 67 .syn_ele = layout_map[i][0],
301 67 .elem_id = layout_map[i][1],
302 .aac_position = pos
303 };
304 67 *layout |= e2c_vec[i].av_position;
305 67 i++;
306 67 j++;
307 67 nb_channels--;
308 }
309 8294 *current = i;
310
311 8294 return 0;
312 }
313
314
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 25649 while (nb_channels & 1) {
315
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 767 if (ff_aac_channel_map[layer][pos - 1][0] == AV_CHAN_NONE)
316 ✗ return -1;
317
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 767 if (ff_aac_channel_map[layer][pos - 1][0] == AV_CHAN_UNUSED)
318 ✗ break;
319 767 e2c_vec[i] = (struct elem_to_channel) {
320 767 .av_position = 1ULL << ff_aac_channel_map[layer][pos - 1][0],
321 767 .syn_ele = layout_map[i][0],
322 767 .elem_id = layout_map[i][1],
323 .aac_position = pos
324 };
325 767 *layout |= e2c_vec[i].av_position;
326 767 i++;
327 767 nb_channels--;
328 }
329
330
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 24882 j = (pos != AAC_CHANNEL_SIDE) && nb_channels <= 3 ? 3 : 1;
331
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 32531 while (nb_channels >= 2) {
332
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 7649 if (ff_aac_channel_map[layer][pos - 1][j] == AV_CHAN_NONE ||
333
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 7649 ff_aac_channel_map[layer][pos - 1][j+1] == AV_CHAN_NONE)
334 ✗ return -1;
335 15298 i += assign_pair(e2c_vec, layout_map, i,
336 7649 1ULL << ff_aac_channel_map[layer][pos - 1][j],
337 7649 1ULL << ff_aac_channel_map[layer][pos - 1][j+1],
338 pos, layout);
339 7649 j += 2;
340 7649 nb_channels -= 2;
341 }
342
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 24882 while (nb_channels & 1) {
343 ✗ if (ff_aac_channel_map[layer][pos - 1][5] == AV_CHAN_NONE)
344 ✗ return -1;
345 ✗ e2c_vec[i] = (struct elem_to_channel) {
346 ✗ .av_position = 1ULL << ff_aac_channel_map[layer][pos - 1][5],
347 ✗ .syn_ele = layout_map[i][0],
348 ✗ .elem_id = layout_map[i][1],
349 .aac_position = pos
350 };
351 ✗ *layout |= e2c_vec[i].av_position;
352 ✗ i++;
353 ✗ nb_channels--;
354 }
355
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 24882 if (nb_channels)
356 ✗ return -1;
357
358 24882 *current = i;
359
360 24882 return 0;
361 }
362
363 8278 static uint64_t sniff_channel_order(uint8_t (*layout_map)[3], int tags)
364 {
365 int i, n, total_non_cc_elements;
366 8278 struct elem_to_channel e2c_vec[4 * MAX_ELEM_ID] = { { 0 } };
367 8278 uint64_t layout = 0;
368
369
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 8278 if (FF_ARRAY_ELEMS(e2c_vec) < tags)
370 ✗ return 0;
371
372
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 16572 for (n = 0, i = 0; n < 3 && i < tags; n++) {
373 8294 int ret = assign_channels(e2c_vec, layout_map, &layout, tags, n, AAC_CHANNEL_FRONT, &i);
374
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 8294 if (ret < 0)
375 ✗ return 0;
376 8294 ret = assign_channels(e2c_vec, layout_map, &layout, tags, n, AAC_CHANNEL_SIDE, &i);
377
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 8294 if (ret < 0)
378 ✗ return 0;
379 8294 ret = assign_channels(e2c_vec, layout_map, &layout, tags, n, AAC_CHANNEL_BACK, &i);
380
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 8294 if (ret < 0)
381 ✗ return 0;
382 8294 ret = assign_channels(e2c_vec, layout_map, &layout, tags, n, AAC_CHANNEL_LFE, &i);
383
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 8294 if (ret < 0)
384 ✗ return 0;
385 }
386
387 8278 total_non_cc_elements = n = i;
388
389
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 8278 if (layout == AV_CH_LAYOUT_22POINT2) {
390 // For 22.2 reorder the result as needed
391 ✗ FFSWAP(struct elem_to_channel, e2c_vec[2], e2c_vec[0]); // FL & FR first (final), FC third
392 ✗ FFSWAP(struct elem_to_channel, e2c_vec[2], e2c_vec[1]); // FC second (final), FLc & FRc third
393 ✗ FFSWAP(struct elem_to_channel, e2c_vec[6], e2c_vec[2]); // LFE1 third (final), FLc & FRc seventh
394 ✗ FFSWAP(struct elem_to_channel, e2c_vec[4], e2c_vec[3]); // BL & BR fourth (final), SiL & SiR fifth
395 ✗ FFSWAP(struct elem_to_channel, e2c_vec[6], e2c_vec[4]); // FLc & FRc fifth (final), SiL & SiR seventh
396 ✗ FFSWAP(struct elem_to_channel, e2c_vec[7], e2c_vec[6]); // LFE2 seventh (final), SiL & SiR eight (final)
397 ✗ FFSWAP(struct elem_to_channel, e2c_vec[9], e2c_vec[8]); // TpFL & TpFR ninth (final), TFC tenth (final)
398 ✗ FFSWAP(struct elem_to_channel, e2c_vec[11], e2c_vec[10]); // TC eleventh (final), TpSiL & TpSiR twelth
399 ✗ FFSWAP(struct elem_to_channel, e2c_vec[12], e2c_vec[11]); // TpBL & TpBR twelth (final), TpSiL & TpSiR thirteenth (final)
400 } else {
401 // For everything else, utilize the AV channel position define as a
402 // stable sort.
403 do {
404 8357 int next_n = 0;
405
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 8700 for (i = 1; i < n; i++)
406
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 343 if (e2c_vec[i - 1].av_position > e2c_vec[i].av_position) {
407 146 FFSWAP(struct elem_to_channel, e2c_vec[i - 1], e2c_vec[i]);
408 146 next_n = i;
409 }
410 8357 n = next_n;
411
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 8357 } while (n > 0);
412
413 }
414
415
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 16765 for (i = 0; i < total_non_cc_elements; i++) {
416 8487 layout_map[i][0] = e2c_vec[i].syn_ele;
417 8487 layout_map[i][1] = e2c_vec[i].elem_id;
418 8487 layout_map[i][2] = e2c_vec[i].aac_position;
419 }
420
421 8278 return layout;
422 }
423
424 /**
425 * Save current output configuration if and only if it has been locked.
426 */
427 4121 static int push_output_configuration(AACDecContext *ac)
428 {
429 4121 int pushed = 0;
430
431
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 4121 if (ac->oc[1].status == OC_LOCKED || ac->oc[0].status == OC_NONE) {
432 4121 ac->oc[0] = ac->oc[1];
433 4121 pushed = 1;
434 }
435 4121 ac->oc[1].status = OC_NONE;
436 4121 return pushed;
437 }
438
439 /**
440 * Restore the previous output configuration if and only if the current
441 * configuration is unlocked.
442 */
443 ✗ static void pop_output_configuration(AACDecContext *ac)
444 {
445 ✗ if (ac->oc[1].status != OC_LOCKED && ac->oc[0].status != OC_NONE) {
446 ✗ ac->oc[1] = ac->oc[0];
447 ✗ ac->avctx->ch_layout = ac->oc[1].ch_layout;
448 ✗ ff_aac_output_configure(ac, ac->oc[1].layout_map, ac->oc[1].layout_map_tags,
449 ac->oc[1].status, 0);
450 }
451 ✗ }
452
453 /**
454 * Configure output channel order based on the current program
455 * configuration element.
456 *
457 * @return Returns error status. 0 - OK, !0 - error
458 */
459 8278 int ff_aac_output_configure(AACDecContext *ac,
460 uint8_t layout_map[MAX_ELEM_ID * 4][3], int tags,
461 enum OCStatus oc_type, int get_new_frame)
462 {
463 8278 AVCodecContext *avctx = ac->avctx;
464 8278 int i, channels = 0, ret;
465 8278 uint64_t layout = 0;
466 8278 uint8_t id_map[TYPE_END][MAX_ELEM_ID] = {{ 0 }};
467 8278 uint8_t type_counts[TYPE_END] = { 0 };
468
469
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 8278 if (ac->oc[1].layout_map != layout_map) {
470 4382 memcpy(ac->oc[1].layout_map, layout_map, tags * sizeof(layout_map[0]));
471 4382 ac->oc[1].layout_map_tags = tags;
472 }
473
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 16773 for (i = 0; i < tags; i++) {
474 8495 int type = layout_map[i][0];
475 8495 int id = layout_map[i][1];
476 8495 id_map[type][id] = type_counts[type]++;
477
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 8495 if (id_map[type][id] >= MAX_ELEM_ID) {
478 ✗ avpriv_request_sample(ac->avctx, "Too large remapped id");
479 ✗ return AVERROR_PATCHWELCOME;
480 }
481 }
482 // Try to sniff a reasonable channel order, otherwise output the
483 // channels in the order the PCE declared them.
484
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 8278 if (ac->output_channel_order == CHANNEL_ORDER_DEFAULT)
485 8278 layout = sniff_channel_order(layout_map, tags);
486
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 16773 for (i = 0; i < tags; i++) {
487 8495 int type = layout_map[i][0];
488 8495 int id = layout_map[i][1];
489 8495 int iid = id_map[type][id];
490 8495 int position = layout_map[i][2];
491 // Allocate or free elements depending on if they are in the
492 // current program configuration.
493 8495 ret = che_configure(ac, position, type, iid, &channels);
494
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 8495 if (ret < 0)
495 ✗ return ret;
496 8495 ac->tag_che_map[type][id] = ac->che[type][iid];
497 }
498
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 8278 if (ac->oc[1].m4ac.ps == 1 && channels == 2) {
499
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 366 if (layout == AV_CH_FRONT_CENTER) {
500 366 layout = AV_CH_FRONT_LEFT|AV_CH_FRONT_RIGHT;
501 } else {
502 ✗ layout = 0;
503 }
504 }
505
506 8278 av_channel_layout_uninit(&ac->oc[1].ch_layout);
507
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 8278 if (layout)
508 8278 av_channel_layout_from_mask(&ac->oc[1].ch_layout, layout);
509 else {
510 ✗ ac->oc[1].ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
511 ✗ ac->oc[1].ch_layout.nb_channels = channels;
512 }
513
514 8278 av_channel_layout_copy(&avctx->ch_layout, &ac->oc[1].ch_layout);
515 8278 ac->oc[1].status = oc_type;
516
517
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 8278 if (get_new_frame) {
518
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 12 if ((ret = frame_configure_elements(ac->avctx)) < 0)
519 ✗ return ret;
520 }
521
522 8278 return 0;
523 }
524
525 9 static av_cold void flush(AVCodecContext *avctx)
526 {
527 9 AACDecContext *ac= avctx->priv_data;
528 int type, i, j;
529
530
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 45 for (type = 3; type >= 0; type--) {
531
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 2340 for (i = 0; i < MAX_ELEM_ID; i++) {
532 2304 ChannelElement *che = ac->che[type][i];
533
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 2304 if (che) {
534
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 27 for (j = 0; j <= 1; j++) {
535 18 memset(che->ch[j].saved, 0, sizeof(che->ch[j].saved));
536 }
537 }
538 }
539 }
540
541 9 ff_aac_usac_reset_state(ac, &ac->oc[1]);
542 9 }
543
544 /**
545 * Set up channel positions based on a default channel configuration
546 * as specified in table 1.17.
547 *
548 * @return Returns error status. 0 - OK, !0 - error
549 */
550 4661 int ff_aac_set_default_channel_config(AACDecContext *ac, AVCodecContext *avctx,
551 uint8_t (*layout_map)[3],
552 int *tags,
553 int channel_config)
554 {
555
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 4661 if (channel_config < 1 || (channel_config > 7 && channel_config < 11) ||
556 channel_config > 14) {
557 ✗ av_log(avctx, AV_LOG_ERROR,
558 "invalid default channel configuration (%d)\n",
559 channel_config);
560 ✗ return AVERROR_INVALIDDATA;
561 }
562 4661 *tags = ff_tags_per_config[channel_config];
563 4661 memcpy(layout_map, ff_aac_channel_layout_map[channel_config - 1],
564 4661 *tags * sizeof(*layout_map));
565
566 /*
567 * AAC specification has 7.1(wide) as a default layout for 8-channel streams.
568 * However, at least Nero AAC encoder encodes 7.1 streams using the default
569 * channel config 7, mapping the side channels of the original audio stream
570 * to the second AAC_CHANNEL_FRONT pair in the AAC stream. Similarly, e.g. FAAD
571 * decodes the second AAC_CHANNEL_FRONT pair as side channels, therefore decoding
572 * the incorrect streams as if they were correct (and as the encoder intended).
573 *
574 * As actual intended 7.1(wide) streams are very rare, default to assuming a
575 * 7.1 layout was intended.
576 */
577
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 4661 if (channel_config == 7 && avctx->strict_std_compliance < FF_COMPLIANCE_STRICT) {
578 ✗ layout_map[2][2] = AAC_CHANNEL_BACK;
579
580 ✗ if (!ac || !ac->warned_71_wide++) {
581 ✗ av_log(avctx, AV_LOG_INFO, "Assuming an incorrectly encoded 7.1 channel layout"
582 " instead of a spec-compliant 7.1(wide) layout, use -strict %d to decode"
583 " according to the specification instead.\n", FF_COMPLIANCE_STRICT);
584 }
585 }
586
587 4661 return 0;
588 }
589
590 67038 ChannelElement *ff_aac_get_che(AACDecContext *ac, int type, int elem_id)
591 {
592 /* For PCE based channel configurations map the channels solely based
593 * on tags. */
594
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 67038 if (!ac->oc[1].m4ac.chan_config) {
595 24124 return ac->tag_che_map[type][elem_id];
596 }
597 // Allow single CPE stereo files to be signalled with mono configuration.
598
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 42914 if (!ac->tags_mapped && type == TYPE_CPE &&
599
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 24528 ac->oc[1].m4ac.chan_config == 1) {
600 uint8_t layout_map[MAX_ELEM_ID*4][3];
601 int layout_map_tags;
602 ✗ push_output_configuration(ac);
603
604 ✗ av_log(ac->avctx, AV_LOG_DEBUG, "mono with CPE\n");
605
606 ✗ if (ff_aac_set_default_channel_config(ac, ac->avctx, layout_map,
607 &layout_map_tags, 2) < 0)
608 ✗ return NULL;
609 ✗ if (ff_aac_output_configure(ac, layout_map, layout_map_tags,
610 OC_TRIAL_FRAME, 1) < 0)
611 ✗ return NULL;
612
613 ✗ ac->oc[1].m4ac.chan_config = 2;
614 ✗ ac->oc[1].m4ac.ps = 0;
615 }
616 // And vice-versa
617
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 42914 if (!ac->tags_mapped && type == TYPE_SCE &&
618
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 15926 ac->oc[1].m4ac.chan_config == 2) {
619 uint8_t layout_map[MAX_ELEM_ID * 4][3];
620 int layout_map_tags;
621 ✗ push_output_configuration(ac);
622
623 ✗ av_log(ac->avctx, AV_LOG_DEBUG, "stereo with SCE\n");
624
625 ✗ layout_map_tags = 2;
626 ✗ layout_map[0][0] = layout_map[1][0] = TYPE_SCE;
627 ✗ layout_map[0][2] = layout_map[1][2] = AAC_CHANNEL_FRONT;
628 ✗ layout_map[0][1] = 0;
629 ✗ layout_map[1][1] = 1;
630 ✗ if (ff_aac_output_configure(ac, layout_map, layout_map_tags,
631 OC_TRIAL_FRAME, 1) < 0)
632 ✗ return NULL;
633
634 ✗ if (ac->oc[1].m4ac.sbr)
635 ✗ ac->oc[1].m4ac.ps = -1;
636 }
637 /* For indexed channel configurations map the channels solely based
638 * on position. */
639
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 42914 switch (ac->oc[1].m4ac.chan_config) {
640 ✗ case 14:
641 ✗ if (ac->tags_mapped > 2 && ((type == TYPE_CPE && elem_id < 3) ||
642 ✗ (type == TYPE_LFE && elem_id < 1))) {
643 ✗ ac->tags_mapped++;
644 ✗ return ac->tag_che_map[type][elem_id] = ac->che[type][elem_id];
645 }
646 case 13:
647 ✗ if (ac->tags_mapped > 3 && ((type == TYPE_CPE && elem_id < 8) ||
648 ✗ (type == TYPE_SCE && elem_id < 6) ||
649 ✗ (type == TYPE_LFE && elem_id < 2))) {
650 ✗ ac->tags_mapped++;
651 ✗ return ac->tag_che_map[type][elem_id] = ac->che[type][elem_id];
652 }
653 case 12:
654 case 7:
655 ✗ if (ac->tags_mapped == 3 && type == TYPE_CPE) {
656 ✗ ac->tags_mapped++;
657 ✗ return ac->tag_che_map[TYPE_CPE][elem_id] = ac->che[TYPE_CPE][2];
658 }
659 case 11:
660 ✗ if (ac->tags_mapped == 3 && type == TYPE_SCE) {
661 ✗ ac->tags_mapped++;
662 ✗ return ac->tag_che_map[TYPE_SCE][elem_id] = ac->che[TYPE_SCE][1];
663 }
664 case 6:
665 /* Some streams incorrectly code 5.1 audio as
666 * SCE[0] CPE[0] CPE[1] SCE[1]
667 * instead of
668 * SCE[0] CPE[0] CPE[1] LFE[0].
669 * If we seem to have encountered such a stream, transfer
670 * the LFE[0] element to the SCE[1]'s mapping */
671
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 3280 if (ac->tags_mapped == ff_tags_per_config[ac->oc[1].m4ac.chan_config] - 1 && (type == TYPE_LFE || type == TYPE_SCE)) {
672
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 820 if (!ac->warned_remapping_once && (type != TYPE_LFE || elem_id != 0)) {
673 ✗ av_log(ac->avctx, AV_LOG_WARNING,
674 "This stream seems to incorrectly report its last channel as %s[%d], mapping to LFE[0]\n",
675 type == TYPE_SCE ? "SCE" : "LFE", elem_id);
676 ✗ ac->warned_remapping_once++;
677 }
678 820 ac->tags_mapped++;
679 820 return ac->tag_che_map[type][elem_id] = ac->che[TYPE_LFE][0];
680 }
681 case 5:
682
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 2460 if (ac->tags_mapped == 2 && type == TYPE_CPE) {
683 820 ac->tags_mapped++;
684 820 return ac->tag_che_map[TYPE_CPE][elem_id] = ac->che[TYPE_CPE][1];
685 }
686 case 4:
687 /* Some streams incorrectly code 4.0 audio as
688 * SCE[0] CPE[0] LFE[0]
689 * instead of
690 * SCE[0] CPE[0] SCE[1].
691 * If we seem to have encountered such a stream, transfer
692 * the SCE[1] element to the LFE[0]'s mapping */
693
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 1640 if (ac->tags_mapped == ff_tags_per_config[ac->oc[1].m4ac.chan_config] - 1 && (type == TYPE_LFE || type == TYPE_SCE)) {
694 ✗ if (!ac->warned_remapping_once && (type != TYPE_SCE || elem_id != 1)) {
695 ✗ av_log(ac->avctx, AV_LOG_WARNING,
696 "This stream seems to incorrectly report its last channel as %s[%d], mapping to SCE[1]\n",
697 type == TYPE_SCE ? "SCE" : "LFE", elem_id);
698 ✗ ac->warned_remapping_once++;
699 }
700 ✗ ac->tags_mapped++;
701 ✗ return ac->tag_che_map[type][elem_id] = ac->che[TYPE_SCE][1];
702 }
703
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 1640 if (ac->tags_mapped == 2 &&
704 ✗ ac->oc[1].m4ac.chan_config == 4 &&
705 type == TYPE_SCE) {
706 ✗ ac->tags_mapped++;
707 ✗ return ac->tag_che_map[TYPE_SCE][elem_id] = ac->che[TYPE_SCE][1];
708 }
709 case 3:
710 case 2:
711
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 26168 if (ac->tags_mapped == (ac->oc[1].m4ac.chan_config != 2) &&
712 type == TYPE_CPE) {
713 25348 ac->tags_mapped++;
714 25348 return ac->tag_che_map[TYPE_CPE][elem_id] = ac->che[TYPE_CPE][0];
715
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 820 } else if (ac->tags_mapped == 1 && ac->oc[1].m4ac.chan_config == 2 &&
716 type == TYPE_SCE) {
717 ✗ ac->tags_mapped++;
718 ✗ return ac->tag_che_map[TYPE_SCE][elem_id] = ac->che[TYPE_SCE][1];
719 }
720 case 1:
721
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 15926 if (!ac->tags_mapped && type == TYPE_SCE) {
722 15926 ac->tags_mapped++;
723 15926 return ac->tag_che_map[TYPE_SCE][elem_id] = ac->che[TYPE_SCE][0];
724 }
725 default:
726 ✗ return NULL;
727 }
728 }
729
730 /**
731 * Decode an array of 4 bit element IDs, optionally interleaved with a
732 * stereo/mono switching bit.
733 *
734 * @param type speaker type/position for these channels
735 */
736 215 static void decode_channel_map(uint8_t layout_map[][3],
737 enum ChannelPosition type,
738 GetBitContext *gb, int n)
739 {
740
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 310 while (n--) {
741 enum RawDataBlockType syn_ele;
742
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 95 switch (type) {
743 75 case AAC_CHANNEL_FRONT:
744 case AAC_CHANNEL_BACK:
745 case AAC_CHANNEL_SIDE:
746 75 syn_ele = get_bits1(gb);
747 75 break;
748 8 case AAC_CHANNEL_CC:
749 8 skip_bits1(gb);
750 8 syn_ele = TYPE_CCE;
751 8 break;
752 12 case AAC_CHANNEL_LFE:
753 12 syn_ele = TYPE_LFE;
754 12 break;
755 ✗ default:
756 // AAC_CHANNEL_OFF has no channel map
757 ✗ av_assert0(0);
758 }
759 95 layout_map[0][0] = syn_ele;
760 95 layout_map[0][1] = get_bits(gb, 4);
761 95 layout_map[0][2] = type;
762 95 layout_map++;
763 }
764 215 }
765
766 43 static inline void relative_align_get_bits(GetBitContext *gb,
767 int reference_position) {
768 43 int n = (reference_position - get_bits_count(gb) & 7);
769
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 43 if (n)
770 39 skip_bits(gb, n);
771 43 }
772
773 /**
774 * Decode program configuration element; reference: table 4.2.
775 *
776 * @return Returns error status. 0 - OK, !0 - error
777 */
778 43 static int decode_pce(AVCodecContext *avctx, MPEG4AudioConfig *m4ac,
779 uint8_t (*layout_map)[3],
780 GetBitContext *gb, int byte_align_ref)
781 {
782 int num_front, num_side, num_back, num_lfe, num_assoc_data, num_cc;
783 int sampling_index;
784 int comment_len;
785 int tags;
786
787 43 skip_bits(gb, 2); // object_type
788
789 43 sampling_index = get_bits(gb, 4);
790
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 43 if (m4ac->sampling_index != sampling_index)
791 ✗ av_log(avctx, AV_LOG_WARNING,
792 "Sample rate index in program config element does not "
793 "match the sample rate index configured by the container.\n");
794
795 43 num_front = get_bits(gb, 4);
796 43 num_side = get_bits(gb, 4);
797 43 num_back = get_bits(gb, 4);
798 43 num_lfe = get_bits(gb, 2);
799 43 num_assoc_data = get_bits(gb, 3);
800 43 num_cc = get_bits(gb, 4);
801
802
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 43 if (get_bits1(gb))
803 ✗ skip_bits(gb, 4); // mono_mixdown_tag
804
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 43 if (get_bits1(gb))
805 ✗ skip_bits(gb, 4); // stereo_mixdown_tag
806
807
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 43 if (get_bits1(gb))
808 ✗ skip_bits(gb, 3); // mixdown_coeff_index and pseudo_surround
809
810
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 43 if (get_bits_left(gb) < 5 * (num_front + num_side + num_back + num_cc) + 4 *(num_lfe + num_assoc_data + num_cc)) {
811 ✗ av_log(avctx, AV_LOG_ERROR, "decode_pce: " overread_err);
812 ✗ return -1;
813 }
814 43 decode_channel_map(layout_map , AAC_CHANNEL_FRONT, gb, num_front);
815 43 tags = num_front;
816 43 decode_channel_map(layout_map + tags, AAC_CHANNEL_SIDE, gb, num_side);
817 43 tags += num_side;
818 43 decode_channel_map(layout_map + tags, AAC_CHANNEL_BACK, gb, num_back);
819 43 tags += num_back;
820 43 decode_channel_map(layout_map + tags, AAC_CHANNEL_LFE, gb, num_lfe);
821 43 tags += num_lfe;
822
823 43 skip_bits_long(gb, 4 * num_assoc_data);
824
825 43 decode_channel_map(layout_map + tags, AAC_CHANNEL_CC, gb, num_cc);
826 43 tags += num_cc;
827
828 43 relative_align_get_bits(gb, byte_align_ref);
829
830 /* comment field, first byte is length */
831 43 comment_len = get_bits(gb, 8) * 8;
832
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 43 if (get_bits_left(gb) < comment_len) {
833 ✗ av_log(avctx, AV_LOG_ERROR, "decode_pce: " overread_err);
834 ✗ return AVERROR_INVALIDDATA;
835 }
836 43 skip_bits_long(gb, comment_len);
837 43 return tags;
838 }
839
840 /**
841 * Decode GA "General Audio" specific configuration; reference: table 4.1.
842 *
843 * @param ac pointer to AACDecContext, may be null
844 * @param avctx pointer to AVCCodecContext, used for logging
845 *
846 * @return Returns error status. 0 - OK, !0 - error
847 */
848 552 static int decode_ga_specific_config(AACDecContext *ac, AVCodecContext *avctx,
849 GetBitContext *gb,
850 int get_bit_alignment,
851 MPEG4AudioConfig *m4ac,
852 int channel_config)
853 {
854 int extension_flag, ret, ep_config, res_flags;
855 uint8_t layout_map[MAX_ELEM_ID*4][3];
856 552 int tags = 0;
857
858 552 m4ac->frame_length_short = get_bits1(gb);
859
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 552 if (m4ac->frame_length_short && m4ac->sbr == 1) {
860 ✗ avpriv_report_missing_feature(avctx, "SBR with 960 frame length");
861 ✗ if (ac) ac->warned_960_sbr = 1;
862 ✗ m4ac->sbr = 0;
863 ✗ m4ac->ps = 0;
864 }
865
866
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 552 if (get_bits1(gb)) // dependsOnCoreCoder
867 ✗ skip_bits(gb, 14); // coreCoderDelay
868 552 extension_flag = get_bits1(gb);
869
870
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 552 if (m4ac->object_type == AOT_AAC_SCALABLE ||
871
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 552 m4ac->object_type == AOT_ER_AAC_SCALABLE)
872 ✗ skip_bits(gb, 3); // layerNr
873
874
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 552 if (channel_config == 0) {
875 43 skip_bits(gb, 4); // element_instance_tag
876 43 tags = decode_pce(avctx, m4ac, layout_map, gb, get_bit_alignment);
877
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 43 if (tags < 0)
878 ✗ return tags;
879 } else {
880
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 509 if ((ret = ff_aac_set_default_channel_config(ac, avctx, layout_map,
881 &tags, channel_config)))
882 ✗ return ret;
883 }
884
885
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 552 if (count_channels(layout_map, tags) > 1) {
886 460 m4ac->ps = 0;
887
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 92 } else if (m4ac->sbr == 1 && m4ac->ps == -1)
888 18 m4ac->ps = 1;
889
890
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 552 if (ac && (ret = ff_aac_output_configure(ac, layout_map, tags, OC_GLOBAL_HDR, 0)))
891 ✗ return ret;
892
893
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 552 if (extension_flag) {
894
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 4 switch (m4ac->object_type) {
895 ✗ case AOT_ER_BSAC:
896 ✗ skip_bits(gb, 5); // numOfSubFrame
897 ✗ skip_bits(gb, 11); // layer_length
898 ✗ break;
899 4 case AOT_ER_AAC_LC:
900 case AOT_ER_AAC_LTP:
901 case AOT_ER_AAC_SCALABLE:
902 case AOT_ER_AAC_LD:
903 4 res_flags = get_bits(gb, 3);
904
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 4 if (res_flags) {
905 ✗ avpriv_report_missing_feature(avctx,
906 "AAC data resilience (flags %x)",
907 res_flags);
908 ✗ return AVERROR_PATCHWELCOME;
909 }
910 4 break;
911 }
912 4 skip_bits1(gb); // extensionFlag3 (TBD in version 3)
913 }
914
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 552 switch (m4ac->object_type) {
915 4 case AOT_ER_AAC_LC:
916 case AOT_ER_AAC_LTP:
917 case AOT_ER_AAC_SCALABLE:
918 case AOT_ER_AAC_LD:
919 4 ep_config = get_bits(gb, 2);
920
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 4 if (ep_config) {
921 ✗ avpriv_report_missing_feature(avctx,
922 "epConfig %d", ep_config);
923 ✗ return AVERROR_PATCHWELCOME;
924 }
925 }
926 552 return 0;
927 }
928
929 10 static int decode_eld_specific_config(AACDecContext *ac, AVCodecContext *avctx,
930 GetBitContext *gb,
931 MPEG4AudioConfig *m4ac,
932 int channel_config)
933 {
934 int ret, ep_config, res_flags;
935 uint8_t layout_map[MAX_ELEM_ID*4][3];
936 10 int tags = 0;
937 10 const int ELDEXT_TERM = 0;
938
939 10 m4ac->ps = 0;
940 10 m4ac->sbr = 0;
941 10 m4ac->frame_length_short = get_bits1(gb);
942
943 10 res_flags = get_bits(gb, 3);
944
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 10 if (res_flags) {
945 ✗ avpriv_report_missing_feature(avctx,
946 "AAC data resilience (flags %x)",
947 res_flags);
948 ✗ return AVERROR_PATCHWELCOME;
949 }
950
951
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 10 if (get_bits1(gb)) { // ldSbrPresentFlag
952 ✗ avpriv_report_missing_feature(avctx,
953 "Low Delay SBR");
954 ✗ return AVERROR_PATCHWELCOME;
955 }
956
957
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 10 while (get_bits(gb, 4) != ELDEXT_TERM) {
958 ✗ int len = get_bits(gb, 4);
959 ✗ if (len == 15)
960 ✗ len += get_bits(gb, 8);
961 ✗ if (len == 15 + 255)
962 ✗ len += get_bits(gb, 16);
963 ✗ if (get_bits_left(gb) < len * 8 + 4) {
964 ✗ av_log(avctx, AV_LOG_ERROR, overread_err);
965 ✗ return AVERROR_INVALIDDATA;
966 }
967 ✗ skip_bits_long(gb, 8 * len);
968 }
969
970
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 10 if ((ret = ff_aac_set_default_channel_config(ac, avctx, layout_map,
971 &tags, channel_config)))
972 ✗ return ret;
973
974
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 10 if (ac && (ret = ff_aac_output_configure(ac, layout_map, tags, OC_GLOBAL_HDR, 0)))
975 ✗ return ret;
976
977 10 ep_config = get_bits(gb, 2);
978
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 10 if (ep_config) {
979 ✗ avpriv_report_missing_feature(avctx,
980 "epConfig %d", ep_config);
981 ✗ return AVERROR_PATCHWELCOME;
982 }
983 10 return 0;
984 }
985
986 /**
987 * Decode audio specific configuration; reference: table 1.13.
988 *
989 * @param ac pointer to AACDecContext, may be null
990 * @param avctx pointer to AVCCodecContext, used for logging
991 * @param m4ac pointer to MPEG4AudioConfig, used for parsing
992 * @param gb buffer holding an audio specific config
993 * @param get_bit_alignment relative alignment for byte align operations
994 * @param sync_extension look for an appended sync extension
995 *
996 * @return Returns error status or number of consumed bits. <0 - error
997 */
998 566 static int decode_audio_specific_config_gb(AACDecContext *ac,
999 AVCodecContext *avctx,
1000 OutputConfiguration *oc,
1001 GetBitContext *gb,
1002 int get_bit_alignment,
1003 int sync_extension)
1004 {
1005 int i, ret;
1006 566 GetBitContext gbc = *gb;
1007 566 MPEG4AudioConfig *m4ac = &oc->m4ac;
1008 566 MPEG4AudioConfig m4ac_bak = *m4ac;
1009
1010
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 566 if ((i = ff_mpeg4audio_get_config_gb(m4ac, &gbc, sync_extension, avctx)) < 0) {
1011 ✗ *m4ac = m4ac_bak;
1012 ✗ return AVERROR_INVALIDDATA;
1013 }
1014
1015
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 566 if (m4ac->sampling_index > 12) {
1016 ✗ av_log(avctx, AV_LOG_ERROR,
1017 "invalid sampling rate index %d\n",
1018 m4ac->sampling_index);
1019 ✗ *m4ac = m4ac_bak;
1020 ✗ return AVERROR_INVALIDDATA;
1021 }
1022
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 566 if (m4ac->object_type == AOT_ER_AAC_LD &&
1023
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 4 (m4ac->sampling_index < 3 || m4ac->sampling_index > 7)) {
1024 ✗ av_log(avctx, AV_LOG_ERROR,
1025 "invalid low delay sampling rate index %d\n",
1026 m4ac->sampling_index);
1027 ✗ *m4ac = m4ac_bak;
1028 ✗ return AVERROR_INVALIDDATA;
1029 }
1030
1031 566 skip_bits_long(gb, i);
1032
1033
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 566 switch (m4ac->object_type) {
1034 552 case AOT_AAC_MAIN:
1035 case AOT_AAC_LC:
1036 case AOT_AAC_SSR:
1037 case AOT_AAC_LTP:
1038 case AOT_ER_AAC_LC:
1039 case AOT_ER_AAC_LD:
1040
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 552 if ((ret = decode_ga_specific_config(ac, avctx, gb, get_bit_alignment,
1041 &oc->m4ac, m4ac->chan_config)) < 0)
1042 ✗ return ret;
1043 552 break;
1044 10 case AOT_ER_AAC_ELD:
1045
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 10 if ((ret = decode_eld_specific_config(ac, avctx, gb,
1046 &oc->m4ac, m4ac->chan_config)) < 0)
1047 ✗ return ret;
1048 10 break;
1049 #if CONFIG_AAC_DECODER
1050 4 case AOT_USAC:
1051
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 4 if ((ret = ff_aac_usac_config_decode(ac, avctx, gb,
1052 oc, m4ac->chan_config)) < 0)
1053 ✗ return ret;
1054 4 break;
1055 #endif
1056 ✗ default:
1057 ✗ avpriv_report_missing_feature(avctx,
1058 "Audio object type %s%d",
1059 ✗ m4ac->sbr == 1 ? "SBR+" : "",
1060 m4ac->object_type);
1061 ✗ return AVERROR(ENOSYS);
1062 }
1063
1064 ff_dlog(avctx,
1065 "AOT %d chan config %d sampling index %d (%d) SBR %d PS %d\n",
1066 m4ac->object_type, m4ac->chan_config, m4ac->sampling_index,
1067 m4ac->sample_rate, m4ac->sbr,
1068 m4ac->ps);
1069
1070 566 return get_bits_count(gb);
1071 }
1072
1073 244 static int decode_audio_specific_config(AACDecContext *ac,
1074 AVCodecContext *avctx,
1075 OutputConfiguration *oc,
1076 const uint8_t *data, int64_t bit_size,
1077 int sync_extension)
1078 {
1079 int i, ret;
1080 GetBitContext gb;
1081
1082
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 244 if (bit_size < 0 || bit_size > INT_MAX) {
1083 ✗ av_log(avctx, AV_LOG_ERROR, "Audio specific config size is invalid\n");
1084 ✗ return AVERROR_INVALIDDATA;
1085 }
1086
1087 ff_dlog(avctx, "audio specific config size %d\n", (int)bit_size >> 3);
1088
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 1657 for (i = 0; i < bit_size >> 3; i++)
1089 ff_dlog(avctx, "%02x ", data[i]);
1090 ff_dlog(avctx, "\n");
1091
1092
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 244 if ((ret = init_get_bits(&gb, data, bit_size)) < 0)
1093 ✗ return ret;
1094
1095 244 return decode_audio_specific_config_gb(ac, avctx, oc, &gb, 0,
1096 sync_extension);
1097 }
1098
1099 298 static av_cold int decode_close(AVCodecContext *avctx)
1100 {
1101 298 AACDecContext *ac = avctx->priv_data;
1102
1103
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 894 for (int i = 0; i < 2; i++) {
1104 596 OutputConfiguration *oc = &ac->oc[i];
1105 596 AACUSACConfig *usac = &oc->usac;
1106
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 604 for (int j = 0; j < usac->nb_elems; j++) {
1107 8 AACUsacElemConfig *ec = &usac->elems[j];
1108 8 av_freep(&ec->ext.pl_data);
1109 }
1110 }
1111
1112
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 1490 for (int type = 0; type < FF_ARRAY_ELEMS(ac->che); type++) {
1113
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 77480 for (int i = 0; i < MAX_ELEM_ID; i++) {
1114
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 76288 if (ac->che[type][i]) {
1115 376 ac->proc.sbr_ctx_close(ac->che[type][i]);
1116 376 av_freep(&ac->che[type][i]);
1117 }
1118 }
1119 }
1120
1121 298 av_tx_uninit(&ac->mdct96);
1122 298 av_tx_uninit(&ac->mdct120);
1123 298 av_tx_uninit(&ac->mdct128);
1124 298 av_tx_uninit(&ac->mdct480);
1125 298 av_tx_uninit(&ac->mdct512);
1126 298 av_tx_uninit(&ac->mdct768);
1127 298 av_tx_uninit(&ac->mdct960);
1128 298 av_tx_uninit(&ac->mdct1024);
1129 298 av_tx_uninit(&ac->mdct_ltp);
1130
1131 // Compiler will optimize this branch away.
1132
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 298 if (ac->is_fixed)
1133 23 av_freep(&ac->RENAME_FIXED(fdsp));
1134 else
1135 275 av_freep(&ac->fdsp);
1136
1137 298 return 0;
1138 }
1139
1140 298 static av_cold int init_dsp(AVCodecContext *avctx)
1141 {
1142 298 AACDecContext *ac = avctx->priv_data;
1143 298 int is_fixed = ac->is_fixed, ret;
1144 float scale_fixed, scale_float;
1145
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 298 const float *const scalep = is_fixed ? &scale_fixed : &scale_float;
1146
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 298 enum AVTXType tx_type = is_fixed ? AV_TX_INT32_MDCT : AV_TX_FLOAT_MDCT;
1147
1148 #define MDCT_INIT(s, fn, len, sval) \
1149 scale_fixed = (sval) * 128.0f; \
1150 scale_float = (sval) / 32768.0f; \
1151 ret = av_tx_init(&s, &fn, tx_type, 1, len, scalep, 0); \
1152 if (ret < 0) \
1153 return ret
1154
1155
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 298 MDCT_INIT(ac->mdct96, ac->mdct96_fn, 96, 1.0/96);
1156
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 298 MDCT_INIT(ac->mdct120, ac->mdct120_fn, 120, 1.0/120);
1157
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 298 MDCT_INIT(ac->mdct128, ac->mdct128_fn, 128, 1.0/128);
1158
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 298 MDCT_INIT(ac->mdct480, ac->mdct480_fn, 480, 1.0/480);
1159
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 298 MDCT_INIT(ac->mdct512, ac->mdct512_fn, 512, 1.0/512);
1160
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 298 MDCT_INIT(ac->mdct768, ac->mdct768_fn, 768, 1.0/768);
1161
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 298 MDCT_INIT(ac->mdct960, ac->mdct960_fn, 960, 1.0/960);
1162
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 298 MDCT_INIT(ac->mdct1024, ac->mdct1024_fn, 1024, 1.0/1024);
1163 #undef MDCT_INIT
1164
1165 /* LTP forward MDCT */
1166 298 scale_fixed = -1.0;
1167 298 scale_float = -32786.0*2 + 36;
1168 298 ret = av_tx_init(&ac->mdct_ltp, &ac->mdct_ltp_fn, tx_type, 0, 1024, scalep, 0);
1169
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 298 if (ret < 0)
1170 ✗ return ret;
1171
1172 298 return 0;
1173 }
1174
1175 298 av_cold int ff_aac_decode_init(AVCodecContext *avctx)
1176 {
1177 298 AACDecContext *ac = avctx->priv_data;
1178 int ret;
1179
1180
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 298 if (avctx->sample_rate > 96000)
1181 ✗ return AVERROR_INVALIDDATA;
1182
1183 298 ff_aacdec_common_init_once();
1184
1185 298 ac->avctx = avctx;
1186 298 ac->oc[1].m4ac.sample_rate = avctx->sample_rate;
1187
1188
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 298 if (avctx->extradata_size > 0) {
1189
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 236 if ((ret = decode_audio_specific_config(ac, ac->avctx, &ac->oc[1],
1190 236 avctx->extradata,
1191 236 avctx->extradata_size * 8LL,
1192 1)) < 0)
1193 ✗ return ret;
1194 } else {
1195 int sr, i;
1196 uint8_t layout_map[MAX_ELEM_ID*4][3];
1197 int layout_map_tags;
1198
1199 62 sr = ff_aac_sample_rate_idx(avctx->sample_rate);
1200 62 ac->oc[1].m4ac.sampling_index = sr;
1201 62 ac->oc[1].m4ac.channels = avctx->ch_layout.nb_channels;
1202 62 ac->oc[1].m4ac.sbr = -1;
1203 62 ac->oc[1].m4ac.ps = -1;
1204
1205
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 110 for (i = 0; i < FF_ARRAY_ELEMS(ff_mpeg4audio_channels); i++)
1206
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 110 if (ff_mpeg4audio_channels[i] == avctx->ch_layout.nb_channels)
1207 62 break;
1208
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 62 if (i == FF_ARRAY_ELEMS(ff_mpeg4audio_channels)) {
1209 ✗ i = 0;
1210 }
1211 62 ac->oc[1].m4ac.chan_config = i;
1212
1213
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 62 if (ac->oc[1].m4ac.chan_config) {
1214 24 int ret = ff_aac_set_default_channel_config(ac, avctx, layout_map,
1215 &layout_map_tags,
1216 ac->oc[1].m4ac.chan_config);
1217
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 24 if (!ret)
1218 24 ff_aac_output_configure(ac, layout_map, layout_map_tags,
1219 OC_GLOBAL_HDR, 0);
1220 ✗ else if (avctx->err_recognition & AV_EF_EXPLODE)
1221 ✗ return AVERROR_INVALIDDATA;
1222 }
1223 }
1224
1225
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 298 if (avctx->ch_layout.nb_channels > MAX_CHANNELS) {
1226 ✗ av_log(avctx, AV_LOG_ERROR, "Too many channels\n");
1227 ✗ return AVERROR_INVALIDDATA;
1228 }
1229
1230 298 ac->random_state = 0x1f2e3d4c;
1231
1232 298 return init_dsp(avctx);
1233 }
1234
1235 /**
1236 * Skip data_stream_element; reference: table 4.10.
1237 */
1238 2821 static int skip_data_stream_element(AACDecContext *ac, GetBitContext *gb)
1239 {
1240 2821 int byte_align = get_bits1(gb);
1241 2821 int count = get_bits(gb, 8);
1242
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 2821 if (count == 255)
1243 ✗ count += get_bits(gb, 8);
1244
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 2821 if (byte_align)
1245 2454 align_get_bits(gb);
1246
1247
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 2821 if (get_bits_left(gb) < 8 * count) {
1248 ✗ av_log(ac->avctx, AV_LOG_ERROR, "skip_data_stream_element: "overread_err);
1249 ✗ return AVERROR_INVALIDDATA;
1250 }
1251 2821 skip_bits_long(gb, 8 * count);
1252 2821 return 0;
1253 }
1254
1255 1426 static int decode_prediction(AACDecContext *ac, IndividualChannelStream *ics,
1256 GetBitContext *gb)
1257 {
1258 int sfb;
1259
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 1426 if (get_bits1(gb)) {
1260 359 ics->predictor_reset_group = get_bits(gb, 5);
1261
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 359 if (ics->predictor_reset_group == 0 ||
1262
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 359 ics->predictor_reset_group > 30) {
1263 ✗ av_log(ac->avctx, AV_LOG_ERROR,
1264 "Invalid Predictor Reset Group.\n");
1265 ✗ return AVERROR_INVALIDDATA;
1266 }
1267 }
1268
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 47801 for (sfb = 0; sfb < FFMIN(ics->max_sfb, ff_aac_pred_sfb_max[ac->oc[1].m4ac.sampling_index]); sfb++) {
1269 46375 ics->prediction_used[sfb] = get_bits1(gb);
1270 }
1271 1426 return 0;
1272 }
1273
1274 /**
1275 * Decode Long Term Prediction data; reference: table 4.xx.
1276 */
1277 786 static void decode_ltp(AACDecContext *ac, LongTermPrediction *ltp,
1278 GetBitContext *gb, uint8_t max_sfb)
1279 {
1280 int sfb;
1281
1282 786 ltp->lag = get_bits(gb, 11);
1283
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 786 if (CONFIG_AAC_FIXED_DECODER && ac->is_fixed)
1284 393 ltp->coef_fixed = Q30(ff_ltp_coef[get_bits(gb, 3)]);
1285 else if (CONFIG_AAC_DECODER)
1286 393 ltp->coef = ff_ltp_coef[get_bits(gb, 3)];
1287
1288
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 32226 for (sfb = 0; sfb < FFMIN(max_sfb, MAX_LTP_LONG_SFB); sfb++)
1289 31440 ltp->used[sfb] = get_bits1(gb);
1290 786 }
1291
1292 /**
1293 * Decode Individual Channel Stream info; reference: table 4.6.
1294 */
1295 63372 static int decode_ics_info(AACDecContext *ac, IndividualChannelStream *ics,
1296 GetBitContext *gb)
1297 {
1298 63372 const MPEG4AudioConfig *const m4ac = &ac->oc[1].m4ac;
1299 63372 const int aot = m4ac->object_type;
1300 63372 const int sampling_index = m4ac->sampling_index;
1301 63372 int ret_fail = AVERROR_INVALIDDATA;
1302
1303
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 63372 if (aot != AOT_ER_AAC_ELD) {
1304
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 47007 if (get_bits1(gb)) {
1305 ✗ av_log(ac->avctx, AV_LOG_ERROR, "Reserved bit set.\n");
1306 ✗ if (ac->avctx->err_recognition & AV_EF_BITSTREAM)
1307 ✗ return AVERROR_INVALIDDATA;
1308 }
1309 47007 ics->window_sequence[1] = ics->window_sequence[0];
1310 47007 ics->window_sequence[0] = get_bits(gb, 2);
1311
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 47007 if (aot == AOT_ER_AAC_LD &&
1312
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 2424 ics->window_sequence[0] != ONLY_LONG_SEQUENCE) {
1313 ✗ av_log(ac->avctx, AV_LOG_ERROR,
1314 "AAC LD is only defined for ONLY_LONG_SEQUENCE but "
1315 ✗ "window sequence %d found.\n", ics->window_sequence[0]);
1316 ✗ ics->window_sequence[0] = ONLY_LONG_SEQUENCE;
1317 ✗ return AVERROR_INVALIDDATA;
1318 }
1319 47007 ics->use_kb_window[1] = ics->use_kb_window[0];
1320 47007 ics->use_kb_window[0] = get_bits1(gb);
1321 }
1322 63372 ics->prev_num_window_groups = FFMAX(ics->num_window_groups, 1);
1323 63372 ics->num_window_groups = 1;
1324 63372 ics->group_len[0] = 1;
1325
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✓ Branch 0 taken 1331 times.
✓ Branch 1 taken 62041 times.
 63372 if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
1326 int i;
1327 1331 ics->max_sfb = get_bits(gb, 4);
1328
2/2
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✓ Branch 1 taken 1331 times.
 10648 for (i = 0; i < 7; i++) {
1329
2/2
✓ Branch 1 taken 5889 times.
✓ Branch 2 taken 3428 times.
 9317 if (get_bits1(gb)) {
1330 5889 ics->group_len[ics->num_window_groups - 1]++;
1331 } else {
1332 3428 ics->num_window_groups++;
1333 3428 ics->group_len[ics->num_window_groups - 1] = 1;
1334 }
1335 }
1336 1331 ics->num_windows = 8;
1337
2/2
✓ Branch 0 taken 1 times.
✓ Branch 1 taken 1330 times.
 1331 if (m4ac->frame_length_short) {
1338 1 ics->swb_offset = ff_swb_offset_120[sampling_index];
1339 1 ics->num_swb = ff_aac_num_swb_120[sampling_index];
1340 } else {
1341 1330 ics->swb_offset = ff_swb_offset_128[sampling_index];
1342 1330 ics->num_swb = ff_aac_num_swb_128[sampling_index];
1343 }
1344 1331 ics->tns_max_bands = ff_tns_max_bands_128[sampling_index];
1345 1331 ics->predictor_present = 0;
1346 } else {
1347 62041 ics->max_sfb = get_bits(gb, 6);
1348 62041 ics->num_windows = 1;
1349
4/4
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✓ Branch 1 taken 2424 times.
✓ Branch 2 taken 16365 times.
✓ Branch 3 taken 43252 times.
 62041 if (aot == AOT_ER_AAC_LD || aot == AOT_ER_AAC_ELD) {
1350
2/2
✓ Branch 0 taken 3559 times.
✓ Branch 1 taken 15230 times.
 18789 if (m4ac->frame_length_short) {
1351 3559 ics->swb_offset = ff_swb_offset_480[sampling_index];
1352 3559 ics->num_swb = ff_aac_num_swb_480[sampling_index];
1353 3559 ics->tns_max_bands = ff_tns_max_bands_480[sampling_index];
1354 } else {
1355 15230 ics->swb_offset = ff_swb_offset_512[sampling_index];
1356 15230 ics->num_swb = ff_aac_num_swb_512[sampling_index];
1357 15230 ics->tns_max_bands = ff_tns_max_bands_512[sampling_index];
1358 }
1359
2/4
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✗ Branch 1 not taken.
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✓ Branch 3 taken 18789 times.
 18789 if (!ics->num_swb || !ics->swb_offset) {
1360 ✗ ret_fail = AVERROR_BUG;
1361 ✗ goto fail;
1362 }
1363 } else {
1364
2/2
✓ Branch 0 taken 386 times.
✓ Branch 1 taken 42866 times.
 43252 if (m4ac->frame_length_short) {
1365 386 ics->num_swb = ff_aac_num_swb_960[sampling_index];
1366 386 ics->swb_offset = ff_swb_offset_960[sampling_index];
1367 } else {
1368 42866 ics->num_swb = ff_aac_num_swb_1024[sampling_index];
1369 42866 ics->swb_offset = ff_swb_offset_1024[sampling_index];
1370 }
1371 43252 ics->tns_max_bands = ff_tns_max_bands_1024[sampling_index];
1372 }
1373
2/2
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✓ Branch 1 taken 16365 times.
 62041 if (aot != AOT_ER_AAC_ELD) {
1374 45676 ics->predictor_present = get_bits1(gb);
1375 45676 ics->predictor_reset_group = 0;
1376 }
1377
2/2
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✓ Branch 1 taken 60077 times.
 62041 if (ics->predictor_present) {
1378
2/2
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✓ Branch 1 taken 538 times.
 1964 if (aot == AOT_AAC_MAIN) {
1379
1/2
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✓ Branch 2 taken 1426 times.
 1426 if (decode_prediction(ac, ics, gb)) {
1380 ✗ goto fail;
1381 }
1382
2/4
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✗ Branch 1 not taken.
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✓ Branch 3 taken 538 times.
 538 } else if (aot == AOT_AAC_LC ||
1383 aot == AOT_ER_AAC_LC) {
1384 ✗ av_log(ac->avctx, AV_LOG_ERROR,
1385 "Prediction is not allowed in AAC-LC.\n");
1386 ✗ goto fail;
1387 } else {
1388
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 538 times.
 538 if (aot == AOT_ER_AAC_LD) {
1389 ✗ av_log(ac->avctx, AV_LOG_ERROR,
1390 "LTP in ER AAC LD not yet implemented.\n");
1391 ✗ ret_fail = AVERROR_PATCHWELCOME;
1392 ✗ goto fail;
1393 }
1394
2/2
✓ Branch 1 taken 382 times.
✓ Branch 2 taken 156 times.
 538 if ((ics->ltp.present = get_bits(gb, 1)))
1395 382 decode_ltp(ac, &ics->ltp, gb, ics->max_sfb);
1396 }
1397 }
1398 }
1399
1400
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 63372 times.
 63372 if (ics->max_sfb > ics->num_swb) {
1401 ✗ av_log(ac->avctx, AV_LOG_ERROR,
1402 "Number of scalefactor bands in group (%d) "
1403 "exceeds limit (%d).\n",
1404 ✗ ics->max_sfb, ics->num_swb);
1405 ✗ goto fail;
1406 }
1407
1408 63372 return 0;
1409 ✗ fail:
1410 ✗ ics->max_sfb = 0;
1411 ✗ return ret_fail;
1412 }
1413
1414 /**
1415 * Decode band types (section_data payload); reference: table 4.46.
1416 *
1417 * @param band_type array of the used band type
1418 * @param band_type_run_end array of the last scalefactor band of a band type run
1419 *
1420 * @return Returns error status. 0 - OK, !0 - error
1421 */
1422 93936 static int decode_band_types(AACDecContext *ac, SingleChannelElement *sce,
1423 GetBitContext *gb)
1424 {
1425 93936 IndividualChannelStream *ics = &sce->ics;
1426
2/2
✓ Branch 0 taken 2089 times.
✓ Branch 1 taken 91847 times.
 93936 const int bits = (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) ? 3 : 5;
1427
1428
2/2
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✓ Branch 1 taken 93936 times.
 193110 for (int g = 0; g < ics->num_window_groups; g++) {
1429 99174 int k = 0;
1430
2/2
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 563829 while (k < ics->max_sfb) {
1431 464655 uint8_t sect_end = k;
1432 int sect_len_incr;
1433 464655 int sect_band_type = get_bits(gb, 4);
1434
1/2
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✓ Branch 1 taken 464655 times.
 464655 if (sect_band_type == 12) {
1435 ✗ av_log(ac->avctx, AV_LOG_ERROR, "invalid band type\n");
1436 ✗ return AVERROR_INVALIDDATA;
1437 }
1438 do {
1439 483418 sect_len_incr = get_bits(gb, bits);
1440 483418 sect_end += sect_len_incr;
1441
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 483418 times.
 483418 if (get_bits_left(gb) < 0) {
1442 ✗ av_log(ac->avctx, AV_LOG_ERROR, "decode_band_types: "overread_err);
1443 ✗ return AVERROR_INVALIDDATA;
1444 }
1445
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 483418 times.
 483418 if (sect_end > ics->max_sfb) {
1446 ✗ av_log(ac->avctx, AV_LOG_ERROR,
1447 "Number of bands (%d) exceeds limit (%d).\n",
1448 ✗ sect_end, ics->max_sfb);
1449 ✗ return AVERROR_INVALIDDATA;
1450 }
1451
2/2
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✓ Branch 1 taken 464655 times.
 483418 } while (sect_len_incr == (1 << bits) - 1);
1452
2/2
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✓ Branch 1 taken 464655 times.
 3943311 for (; k < sect_end; k++)
1453 3478656 sce->band_type[g*ics->max_sfb + k] = sect_band_type;
1454 }
1455 }
1456 93936 return 0;
1457 }
1458
1459 /**
1460 * Decode scalefactors; reference: table 4.47.
1461 *
1462 * @param global_gain first scalefactor value as scalefactors are differentially coded
1463 * @param band_type array of the used band type
1464 * @param band_type_run_end array of the last scalefactor band of a band type run
1465 * @param sf array of scalefactors or intensity stereo positions
1466 *
1467 * @return Returns error status. 0 - OK, !0 - error
1468 */
1469 93936 static int decode_scalefactors(AACDecContext *ac, SingleChannelElement *sce,
1470 GetBitContext *gb, unsigned int global_gain)
1471 {
1472 93936 IndividualChannelStream *ics = &sce->ics;
1473 93936 int offset[3] = { global_gain, global_gain - NOISE_OFFSET, 0 };
1474 int clipped_offset;
1475 93936 int noise_flag = 1;
1476
1477
2/2
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✓ Branch 1 taken 93936 times.
 193110 for (int g = 0; g < ics->num_window_groups; g++) {
1478
2/2
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✓ Branch 1 taken 99174 times.
 3577830 for (int sfb = 0; sfb < ics->max_sfb; sfb++) {
1479
4/4
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✓ Branch 1 taken 66207 times.
✓ Branch 2 taken 281615 times.
✓ Branch 3 taken 2593829 times.
 3478656 switch (sce->band_type[g*ics->max_sfb + sfb]) {
1480 537005 case ZERO_BT:
1481 537005 sce->sfo[g*ics->max_sfb + sfb] = 0;
1482 537005 break;
1483 66207 case INTENSITY_BT: /* fallthrough */
1484 case INTENSITY_BT2:
1485 66207 offset[2] += get_vlc2(gb, ff_vlc_scalefactors, 7, 3) - SCALE_DIFF_ZERO;
1486 66207 clipped_offset = av_clip(offset[2], -155, 100);
1487
1/2
✗ Branch 0 not taken.
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 66207 if (offset[2] != clipped_offset) {
1488 ✗ avpriv_request_sample(ac->avctx,
1489 "If you heard an audible artifact, there may be a bug in the decoder. "
1490 "Clipped intensity stereo position (%d -> %d)",
1491 offset[2], clipped_offset);
1492 }
1493 66207 sce->sfo[g*ics->max_sfb + sfb] = clipped_offset - 100;
1494 66207 break;
1495 281615 case NOISE_BT:
1496
2/2
✓ Branch 0 taken 6715 times.
✓ Branch 1 taken 274900 times.
 281615 if (noise_flag-- > 0)
1497 6715 offset[1] += get_bits(gb, NOISE_PRE_BITS) - NOISE_PRE;
1498 else
1499 274900 offset[1] += get_vlc2(gb, ff_vlc_scalefactors, 7, 3) - SCALE_DIFF_ZERO;
1500 281615 clipped_offset = av_clip(offset[1], -100, 155);
1501
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✓ Branch 1 taken 281615 times.
 281615 if (offset[1] != clipped_offset) {
1502 ✗ avpriv_request_sample(ac->avctx,
1503 "If you heard an audible artifact, there may be a bug in the decoder. "
1504 "Clipped noise gain (%d -> %d)",
1505 offset[1], clipped_offset);
1506 }
1507 281615 sce->sfo[g*ics->max_sfb + sfb] = clipped_offset;
1508 281615 break;
1509 2593829 default:
1510 2593829 offset[0] += get_vlc2(gb, ff_vlc_scalefactors, 7, 3) - SCALE_DIFF_ZERO;
1511
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 2593829 times.
 2593829 if (offset[0] > 255U) {
1512 ✗ av_log(ac->avctx, AV_LOG_ERROR,
1513 "Scalefactor (%d) out of range.\n", offset[0]);
1514 ✗ return AVERROR_INVALIDDATA;
1515 }
1516 2593829 sce->sfo[g*ics->max_sfb + sfb] = offset[0] - 100;
1517 2593829 break;
1518 }
1519 }
1520 }
1521
1522 93936 return 0;
1523 }
1524
1525 /**
1526 * Decode pulse data; reference: table 4.7.
1527 */
1528 1098 static int decode_pulses(Pulse *pulse, GetBitContext *gb,
1529 const uint16_t *swb_offset, int num_swb)
1530 {
1531 int i, pulse_swb;
1532 1098 pulse->num_pulse = get_bits(gb, 2) + 1;
1533 1098 pulse_swb = get_bits(gb, 6);
1534
1/2
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✓ Branch 1 taken 1098 times.
 1098 if (pulse_swb >= num_swb)
1535 ✗ return -1;
1536 1098 pulse->pos[0] = swb_offset[pulse_swb];
1537 1098 pulse->pos[0] += get_bits(gb, 5);
1538
1/2
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✓ Branch 1 taken 1098 times.
 1098 if (pulse->pos[0] >= swb_offset[num_swb])
1539 ✗ return -1;
1540 1098 pulse->amp[0] = get_bits(gb, 4);
1541
2/2
✓ Branch 0 taken 1646 times.
✓ Branch 1 taken 1098 times.
 2744 for (i = 1; i < pulse->num_pulse; i++) {
1542 1646 pulse->pos[i] = get_bits(gb, 5) + pulse->pos[i - 1];
1543
1/2
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✓ Branch 1 taken 1646 times.
 1646 if (pulse->pos[i] >= swb_offset[num_swb])
1544 ✗ return -1;
1545 1646 pulse->amp[i] = get_bits(gb, 4);
1546 }
1547 1098 return 0;
1548 }
1549
1550 /**
1551 * Decode Temporal Noise Shaping data; reference: table 4.48.
1552 *
1553 * @return Returns error status. 0 - OK, !0 - error
1554 */
1555 6955 int ff_aac_decode_tns(AACDecContext *ac, TemporalNoiseShaping *tns,
1556 GetBitContext *gb, const IndividualChannelStream *ics)
1557 {
1558 6955 int tns_max_order = INT32_MAX;
1559 6955 const int is_usac = ac->oc[1].m4ac.object_type == AOT_USAC;
1560 int w, filt, i, coef_len, coef_res, coef_compress;
1561 6955 const int is8 = ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE;
1562
1563 /* USAC doesn't seem to have a limit */
1564
1/2
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✗ Branch 1 not taken.
 6955 if (!is_usac)
1565
4/4
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✓ Branch 1 taken 659 times.
✓ Branch 2 taken 163 times.
✓ Branch 3 taken 6133 times.
 6955 tns_max_order = is8 ? 7 : ac->oc[1].m4ac.object_type == AOT_AAC_MAIN ? 20 : 12;
1566
1567
2/2
✓ Branch 0 taken 11568 times.
✓ Branch 1 taken 6955 times.
 18523 for (w = 0; w < ics->num_windows; w++) {
1568
2/2
✓ Branch 1 taken 7946 times.
✓ Branch 2 taken 3622 times.
 11568 if ((tns->n_filt[w] = get_bits(gb, 2 - is8))) {
1569 7946 coef_res = get_bits1(gb);
1570
1571
2/2
✓ Branch 0 taken 9407 times.
✓ Branch 1 taken 7946 times.
 17353 for (filt = 0; filt < tns->n_filt[w]; filt++) {
1572 int tmp2_idx;
1573 9407 tns->length[w][filt] = get_bits(gb, 6 - 2 * is8);
1574
1575
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 9407 times.
 9407 if (is_usac)
1576 ✗ tns->order[w][filt] = get_bits(gb, 4 - is8);
1577 else
1578 9407 tns->order[w][filt] = get_bits(gb, 5 - (2 * is8));
1579
1580
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 9407 times.
 9407 if (tns->order[w][filt] > tns_max_order) {
1581 ✗ av_log(ac->avctx, AV_LOG_ERROR,
1582 "TNS filter order %d is greater than maximum %d.\n",
1583 tns->order[w][filt], tns_max_order);
1584 ✗ tns->order[w][filt] = 0;
1585 ✗ return AVERROR_INVALIDDATA;
1586 }
1587
2/2
✓ Branch 0 taken 8887 times.
✓ Branch 1 taken 520 times.
 9407 if (tns->order[w][filt]) {
1588 8887 tns->direction[w][filt] = get_bits1(gb);
1589 8887 coef_compress = get_bits1(gb);
1590 8887 coef_len = coef_res + 3 - coef_compress;
1591 8887 tmp2_idx = 2 * coef_compress + coef_res;
1592
1593
2/2
✓ Branch 0 taken 58548 times.
✓ Branch 1 taken 8887 times.
 67435 for (i = 0; i < tns->order[w][filt]; i++) {
1594
2/2
✓ Branch 0 taken 14113 times.
✓ Branch 1 taken 44435 times.
 58548 if (CONFIG_AAC_FIXED_DECODER && ac->is_fixed)
1595 14113 tns->coef_fixed[w][filt][i] = Q31(ff_tns_tmp2_map[tmp2_idx][get_bits(gb, coef_len)]);
1596 else if (CONFIG_AAC_DECODER)
1597 44435 tns->coef[w][filt][i] = ff_tns_tmp2_map[tmp2_idx][get_bits(gb, coef_len)];
1598 }
1599 }
1600 }
1601 }
1602 }
1603 6955 return 0;
1604 }
1605
1606 /**
1607 * Decode Mid/Side data; reference: table 4.54.
1608 *
1609 * @param ms_present Indicates mid/side stereo presence. [0] mask is all 0s;
1610 * [1] mask is decoded from bitstream; [2] mask is all 1s;
1611 * [3] reserved for scalable AAC
1612 */
1613 27052 static void decode_mid_side_stereo(ChannelElement *cpe, GetBitContext *gb,
1614 int ms_present)
1615 {
1616 int idx;
1617 27052 int max_idx = cpe->ch[0].ics.num_window_groups * cpe->ch[0].ics.max_sfb;
1618 27052 cpe->max_sfb_ste = cpe->ch[0].ics.max_sfb;
1619
2/2
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✓ Branch 1 taken 14365 times.
 27052 if (ms_present == 1) {
1620
2/2
✓ Branch 0 taken 497864 times.
✓ Branch 1 taken 12687 times.
 510551 for (idx = 0; idx < max_idx; idx++)
1621 497864 cpe->ms_mask[idx] = get_bits1(gb);
1622
1/2
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✗ Branch 1 not taken.
 14365 } else if (ms_present == 2) {
1623 14365 memset(cpe->ms_mask, 1, max_idx * sizeof(cpe->ms_mask[0]));
1624 }
1625 27052 }
1626
1627 ✗ static void decode_gain_control(SingleChannelElement * sce, GetBitContext * gb)
1628 {
1629 // wd_num, wd_test, aloc_size
1630 static const uint8_t gain_mode[4][3] = {
1631 {1, 0, 5}, // ONLY_LONG_SEQUENCE = 0,
1632 {2, 1, 2}, // LONG_START_SEQUENCE,
1633 {8, 0, 2}, // EIGHT_SHORT_SEQUENCE,
1634 {2, 1, 5}, // LONG_STOP_SEQUENCE
1635 };
1636
1637 ✗ const int mode = sce->ics.window_sequence[0];
1638 uint8_t bd, wd, ad;
1639
1640 // FIXME: Store the gain control data on |sce| and do something with it.
1641 ✗ uint8_t max_band = get_bits(gb, 2);
1642 ✗ for (bd = 0; bd < max_band; bd++) {
1643 ✗ for (wd = 0; wd < gain_mode[mode][0]; wd++) {
1644 ✗ uint8_t adjust_num = get_bits(gb, 3);
1645 ✗ for (ad = 0; ad < adjust_num; ad++) {
1646 ✗ skip_bits(gb, 4 + ((wd == 0 && gain_mode[mode][1])
1647 ? 4
1648 ✗ : gain_mode[mode][2]));
1649 }
1650 }
1651 }
1652 ✗ }
1653
1654 /**
1655 * Decode an individual_channel_stream payload; reference: table 4.44.
1656 *
1657 * @param common_window Channels have independent [0], or shared [1], Individual Channel Stream information.
1658 * @param scale_flag scalable [1] or non-scalable [0] AAC (Unused until scalable AAC is implemented.)
1659 *
1660 * @return Returns error status. 0 - OK, !0 - error
1661 */
1662 93936 int ff_aac_decode_ics(AACDecContext *ac, SingleChannelElement *sce,
1663 GetBitContext *gb, int common_window, int scale_flag)
1664 {
1665 Pulse pulse;
1666 93936 TemporalNoiseShaping *tns = &sce->tns;
1667 93936 IndividualChannelStream *ics = &sce->ics;
1668 93936 int global_gain, eld_syntax, er_syntax, pulse_present = 0;
1669 int ret;
1670
1671 93936 eld_syntax = ac->oc[1].m4ac.object_type == AOT_ER_AAC_ELD;
1672 281808 er_syntax = ac->oc[1].m4ac.object_type == AOT_ER_AAC_LC ||
1673
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✗ Branch 1 not taken.
 93936 ac->oc[1].m4ac.object_type == AOT_ER_AAC_LTP ||
1674
3/4
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✗ Branch 1 not taken.
✓ Branch 2 taken 90300 times.
✓ Branch 3 taken 3636 times.
 278172 ac->oc[1].m4ac.object_type == AOT_ER_AAC_LD ||
1675
2/2
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✓ Branch 1 taken 63702 times.
 90300 ac->oc[1].m4ac.object_type == AOT_ER_AAC_ELD;
1676
1677 /* This assignment is to silence a GCC warning about the variable being used
1678 * uninitialized when in fact it always is.
1679 */
1680 93936 pulse.num_pulse = 0;
1681
1682 93936 global_gain = get_bits(gb, 8);
1683
1684
3/4
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✓ Branch 2 taken 32808 times.
✗ Branch 3 not taken.
 93936 if (!common_window && !scale_flag) {
1685 32808 ret = decode_ics_info(ac, ics, gb);
1686
1/2
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✓ Branch 1 taken 32808 times.
 32808 if (ret < 0)
1687 ✗ goto fail;
1688 }
1689
1690
1/2
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 93936 if ((ret = decode_band_types(ac, sce, gb)) < 0)
1691 ✗ goto fail;
1692
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 93936 times.
 93936 if ((ret = decode_scalefactors(ac, sce, gb, global_gain)) < 0)
1693 ✗ goto fail;
1694
1695 93936 ac->dsp.dequant_scalefactors(sce);
1696
1697 93936 pulse_present = 0;
1698
1/2
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✗ Branch 1 not taken.
 93936 if (!scale_flag) {
1699
4/4
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✓ Branch 3 taken 1098 times.
✓ Branch 4 taken 66240 times.
 93936 if (!eld_syntax && (pulse_present = get_bits1(gb))) {
1700
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1098 times.
 1098 if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
1701 ✗ av_log(ac->avctx, AV_LOG_ERROR,
1702 "Pulse tool not allowed in eight short sequence.\n");
1703 ✗ ret = AVERROR_INVALIDDATA;
1704 ✗ goto fail;
1705 }
1706
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 1098 times.
 1098 if (decode_pulses(&pulse, gb, ics->swb_offset, ics->num_swb)) {
1707 ✗ av_log(ac->avctx, AV_LOG_ERROR,
1708 "Pulse data corrupt or invalid.\n");
1709 ✗ ret = AVERROR_INVALIDDATA;
1710 ✗ goto fail;
1711 }
1712 }
1713 93936 tns->present = get_bits1(gb);
1714
4/4
✓ Branch 0 taken 6955 times.
✓ Branch 1 taken 86981 times.
✓ Branch 2 taken 5691 times.
✓ Branch 3 taken 1264 times.
 93936 if (tns->present && !er_syntax) {
1715 5691 ret = ff_aac_decode_tns(ac, tns, gb, ics);
1716
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 5691 times.
 5691 if (ret < 0)
1717 ✗ goto fail;
1718 }
1719
3/4
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✗ Branch 3 not taken.
✓ Branch 4 taken 67338 times.
 93936 if (!eld_syntax && get_bits1(gb)) {
1720 ✗ decode_gain_control(sce, gb);
1721 ✗ if (!ac->warned_gain_control) {
1722 ✗ avpriv_report_missing_feature(ac->avctx, "Gain control");
1723 ✗ ac->warned_gain_control = 1;
1724 }
1725 }
1726 // I see no textual basis in the spec for this occurring after SSR gain
1727 // control, but this is what both reference and real implmentations do
1728
4/4
✓ Branch 0 taken 6955 times.
✓ Branch 1 taken 86981 times.
✓ Branch 2 taken 1264 times.
✓ Branch 3 taken 5691 times.
 93936 if (tns->present && er_syntax) {
1729 1264 ret = ff_aac_decode_tns(ac, tns, gb, ics);
1730
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1264 times.
 1264 if (ret < 0)
1731 ✗ goto fail;
1732 }
1733 }
1734
1735
2/2
✓ Branch 0 taken 1098 times.
✓ Branch 1 taken 92838 times.
 93936 ret = ac->proc.decode_spectrum_and_dequant(ac, gb,
1736 pulse_present ? &pulse : NULL,
1737 sce);
1738
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 93936 times.
 93936 if (ret < 0)
1739 ✗ goto fail;
1740
1741
4/4
✓ Branch 0 taken 7388 times.
✓ Branch 1 taken 86548 times.
✓ Branch 2 taken 6094 times.
✓ Branch 3 taken 1294 times.
 93936 if (ac->oc[1].m4ac.object_type == AOT_AAC_MAIN && !common_window)
1742 6094 ac->dsp.apply_prediction(ac, sce);
1743
1744 93936 return 0;
1745 ✗ fail:
1746 ✗ tns->present = 0;
1747 ✗ return ret;
1748 }
1749
1750 /**
1751 * Decode a channel_pair_element; reference: table 4.4.
1752 *
1753 * @return Returns error status. 0 - OK, !0 - error
1754 */
1755 30786 static int decode_cpe(AACDecContext *ac, GetBitContext *gb, ChannelElement *cpe)
1756 {
1757 30786 int i, ret, common_window, ms_present = 0;
1758 30786 int eld_syntax = ac->oc[1].m4ac.object_type == AOT_ER_AAC_ELD;
1759
1760
4/4
✓ Branch 0 taken 20553 times.
✓ Branch 1 taken 10233 times.
✓ Branch 3 taken 20331 times.
✓ Branch 4 taken 222 times.
 30786 common_window = eld_syntax || get_bits1(gb);
1761
2/2
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✓ Branch 1 taken 222 times.
 30786 if (common_window) {
1762
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 30564 times.
 30564 if (decode_ics_info(ac, &cpe->ch[0].ics, gb))
1763 ✗ return AVERROR_INVALIDDATA;
1764 30564 i = cpe->ch[1].ics.use_kb_window[0];
1765 30564 cpe->ch[1].ics = cpe->ch[0].ics;
1766 30564 cpe->ch[1].ics.use_kb_window[1] = i;
1767
2/2
✓ Branch 0 taken 723 times.
✓ Branch 1 taken 29841 times.
 30564 if (cpe->ch[1].ics.predictor_present &&
1768
2/2
✓ Branch 0 taken 538 times.
✓ Branch 1 taken 185 times.
 723 (ac->oc[1].m4ac.object_type != AOT_AAC_MAIN))
1769
2/2
✓ Branch 1 taken 404 times.
✓ Branch 2 taken 134 times.
 538 if ((cpe->ch[1].ics.ltp.present = get_bits(gb, 1)))
1770 404 decode_ltp(ac, &cpe->ch[1].ics.ltp, gb, cpe->ch[1].ics.max_sfb);
1771 30564 ms_present = get_bits(gb, 2);
1772
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 30564 times.
 30564 if (ms_present == 3) {
1773 ✗ av_log(ac->avctx, AV_LOG_ERROR, "ms_present = 3 is reserved.\n");
1774 ✗ return AVERROR_INVALIDDATA;
1775
2/2
✓ Branch 0 taken 27052 times.
✓ Branch 1 taken 3512 times.
 30564 } else if (ms_present)
1776 27052 decode_mid_side_stereo(cpe, gb, ms_present);
1777 }
1778
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 30786 times.
 30786 if ((ret = ff_aac_decode_ics(ac, &cpe->ch[0], gb, common_window, 0)))
1779 ✗ return ret;
1780
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 30786 times.
 30786 if ((ret = ff_aac_decode_ics(ac, &cpe->ch[1], gb, common_window, 0)))
1781 ✗ return ret;
1782
1783
2/2
✓ Branch 0 taken 30564 times.
✓ Branch 1 taken 222 times.
 30786 if (common_window) {
1784
2/2
✓ Branch 0 taken 27052 times.
✓ Branch 1 taken 3512 times.
 30564 if (ms_present)
1785 27052 ac->dsp.apply_mid_side_stereo(ac, cpe);
1786
2/2
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✓ Branch 1 taken 29917 times.
 30564 if (ac->oc[1].m4ac.object_type == AOT_AAC_MAIN) {
1787 647 ac->dsp.apply_prediction(ac, &cpe->ch[0]);
1788 647 ac->dsp.apply_prediction(ac, &cpe->ch[1]);
1789 }
1790 }
1791
1792 30786 ac->dsp.apply_intensity_stereo(ac, cpe, ms_present);
1793 30786 return 0;
1794 }
1795
1796 /**
1797 * Parse whether channels are to be excluded from Dynamic Range Compression; reference: table 4.53.
1798 *
1799 * @return Returns number of bytes consumed.
1800 */
1801 4 static int decode_drc_channel_exclusions(DynamicRangeControl *che_drc,
1802 GetBitContext *gb)
1803 {
1804 int i;
1805 4 int num_excl_chan = 0;
1806
1807 do {
1808
2/2
✓ Branch 0 taken 28 times.
✓ Branch 1 taken 4 times.
 32 for (i = 0; i < 7; i++)
1809 28 che_drc->exclude_mask[num_excl_chan++] = get_bits1(gb);
1810
2/4
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✗ Branch 1 not taken.
✗ Branch 3 not taken.
✓ Branch 4 taken 4 times.
 4 } while (num_excl_chan < MAX_CHANNELS - 7 && get_bits1(gb));
1811
1812 4 return num_excl_chan / 7;
1813 }
1814
1815 /**
1816 * Decode dynamic range information; reference: table 4.52.
1817 *
1818 * @return Returns number of bytes consumed.
1819 */
1820 880 static int decode_dynamic_range(DynamicRangeControl *che_drc,
1821 GetBitContext *gb)
1822 {
1823 880 int n = 1;
1824 880 int drc_num_bands = 1;
1825 int i;
1826
1827 /* pce_tag_present? */
1828
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 880 times.
 880 if (get_bits1(gb)) {
1829 ✗ che_drc->pce_instance_tag = get_bits(gb, 4);
1830 ✗ skip_bits(gb, 4); // tag_reserved_bits
1831 ✗ n++;
1832 }
1833
1834 /* excluded_chns_present? */
1835
2/2
✓ Branch 1 taken 4 times.
✓ Branch 2 taken 876 times.
 880 if (get_bits1(gb)) {
1836 4 n += decode_drc_channel_exclusions(che_drc, gb);
1837 }
1838
1839 /* drc_bands_present? */
1840
2/2
✓ Branch 1 taken 35 times.
✓ Branch 2 taken 845 times.
 880 if (get_bits1(gb)) {
1841 35 che_drc->band_incr = get_bits(gb, 4);
1842 35 che_drc->interpolation_scheme = get_bits(gb, 4);
1843 35 n++;
1844 35 drc_num_bands += che_drc->band_incr;
1845
2/2
✓ Branch 0 taken 105 times.
✓ Branch 1 taken 35 times.
 140 for (i = 0; i < drc_num_bands; i++) {
1846 105 che_drc->band_top[i] = get_bits(gb, 8);
1847 105 n++;
1848 }
1849 }
1850
1851 /* prog_ref_level_present? */
1852
2/2
✓ Branch 1 taken 878 times.
✓ Branch 2 taken 2 times.
 880 if (get_bits1(gb)) {
1853 878 che_drc->prog_ref_level = get_bits(gb, 7);
1854 878 skip_bits1(gb); // prog_ref_level_reserved_bits
1855 878 n++;
1856 }
1857
1858
2/2
✓ Branch 0 taken 950 times.
✓ Branch 1 taken 880 times.
 1830 for (i = 0; i < drc_num_bands; i++) {
1859 950 che_drc->dyn_rng_sgn[i] = get_bits1(gb);
1860 950 che_drc->dyn_rng_ctl[i] = get_bits(gb, 7);
1861 950 n++;
1862 }
1863
1864 880 return n;
1865 }
1866
1867 8953 static int decode_fill(AACDecContext *ac, GetBitContext *gb, int len) {
1868 uint8_t buf[256];
1869 int i, major, minor;
1870
1871
2/2
✓ Branch 0 taken 380 times.
✓ Branch 1 taken 8573 times.
 8953 if (len < 13+7*8)
1872 380 goto unknown;
1873
1874 8573 get_bits(gb, 13); len -= 13;
1875
1876
4/4
✓ Branch 0 taken 1136851 times.
✓ Branch 1 taken 443 times.
✓ Branch 2 taken 1128721 times.
✓ Branch 3 taken 8130 times.
 1137294 for(i=0; i+1<sizeof(buf) && len>=8; i++, len-=8)
1877 1128721 buf[i] = get_bits(gb, 8);
1878
1879 8573 buf[i] = 0;
1880
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 8573 times.
 8573 if (ac->avctx->debug & FF_DEBUG_PICT_INFO)
1881 ✗ av_log(ac->avctx, AV_LOG_DEBUG, "FILL:%s\n", buf);
1882
1883
2/2
✓ Branch 0 taken 8554 times.
✓ Branch 1 taken 19 times.
 8573 if (sscanf(buf, "libfaac %d.%d", &major, &minor) == 2){
1884 19 ac->avctx->internal->skip_samples = 1024;
1885 }
1886
1887 8554 unknown:
1888 8953 skip_bits_long(gb, len);
1889
1890 8953 return 0;
1891 }
1892
1893 /**
1894 * Decode extension data (incomplete); reference: table 4.51.
1895 *
1896 * @param cnt length of TYPE_FIL syntactic element in bytes
1897 *
1898 * @return Returns number of bytes consumed
1899 */
1900 23684 static int decode_extension_payload(AACDecContext *ac, GetBitContext *gb, int cnt,
1901 ChannelElement *che, enum RawDataBlockType elem_type)
1902 {
1903 23684 int crc_flag = 0;
1904 23684 int res = cnt;
1905 23684 int type = get_bits(gb, 4);
1906
1907
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 23684 times.
 23684 if (ac->avctx->debug & FF_DEBUG_STARTCODE)
1908 ✗ av_log(ac->avctx, AV_LOG_DEBUG, "extension type: %d len:%d\n", type, cnt);
1909
1910
4/5
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✓ Branch 1 taken 10901 times.
✓ Branch 2 taken 880 times.
✓ Branch 3 taken 8953 times.
✓ Branch 4 taken 2950 times.
 23684 switch (type) { // extension type
1911 ✗ case EXT_SBR_DATA_CRC:
1912 ✗ crc_flag++;
1913 10901 case EXT_SBR_DATA:
1914
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 10901 times.
 10901 if (!che) {
1915 ✗ av_log(ac->avctx, AV_LOG_ERROR, "SBR was found before the first channel element.\n");
1916 ✗ return res;
1917
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 10901 times.
 10901 } else if (ac->oc[1].m4ac.frame_length_short) {
1918 ✗ if (!ac->warned_960_sbr)
1919 ✗ avpriv_report_missing_feature(ac->avctx,
1920 "SBR with 960 frame length");
1921 ✗ ac->warned_960_sbr = 1;
1922 ✗ skip_bits_long(gb, 8 * cnt - 4);
1923 ✗ return res;
1924
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 10901 times.
 10901 } else if (!ac->oc[1].m4ac.sbr) {
1925 ✗ av_log(ac->avctx, AV_LOG_ERROR, "SBR signaled to be not-present but was found in the bitstream.\n");
1926 ✗ skip_bits_long(gb, 8 * cnt - 4);
1927 ✗ return res;
1928
3/4
✓ Branch 0 taken 22 times.
✓ Branch 1 taken 10879 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 22 times.
 10901 } else if (ac->oc[1].m4ac.sbr == -1 && ac->oc[1].status == OC_LOCKED) {
1929 ✗ av_log(ac->avctx, AV_LOG_ERROR, "Implicit SBR was found with a first occurrence after the first frame.\n");
1930 ✗ skip_bits_long(gb, 8 * cnt - 4);
1931 ✗ return res;
1932
3/4
✓ Branch 0 taken 94 times.
✓ Branch 1 taken 10807 times.
✓ Branch 2 taken 94 times.
✗ Branch 3 not taken.
 10901 } else if (ac->oc[1].m4ac.ps == -1 && ac->oc[1].status < OC_LOCKED &&
1933
2/2
✓ Branch 0 taken 12 times.
✓ Branch 1 taken 82 times.
 94 ac->avctx->ch_layout.nb_channels == 1) {
1934 12 ac->oc[1].m4ac.sbr = 1;
1935 12 ac->oc[1].m4ac.ps = 1;
1936 12 ac->avctx->profile = AV_PROFILE_AAC_HE_V2;
1937 12 ff_aac_output_configure(ac, ac->oc[1].layout_map, ac->oc[1].layout_map_tags,
1938 ac->oc[1].status, 1);
1939 } else {
1940 10889 ac->oc[1].m4ac.sbr = 1;
1941 10889 ac->avctx->profile = AV_PROFILE_AAC_HE;
1942 }
1943
1944 10901 ac->proc.sbr_decode_extension(ac, che, gb, crc_flag, cnt, elem_type);
1945
1946
4/4
✓ Branch 0 taken 1999 times.
✓ Branch 1 taken 8902 times.
✓ Branch 2 taken 22 times.
✓ Branch 3 taken 1977 times.
 10901 if (ac->oc[1].m4ac.ps == 1 && !ac->warned_he_aac_mono) {
1947 22 av_log(ac->avctx, AV_LOG_VERBOSE, "Treating HE-AAC mono as stereo.\n");
1948 22 ac->warned_he_aac_mono = 1;
1949 }
1950 10901 break;
1951 880 case EXT_DYNAMIC_RANGE:
1952 880 res = decode_dynamic_range(&ac->che_drc, gb);
1953 880 break;
1954 8953 case EXT_FILL:
1955 8953 decode_fill(ac, gb, 8 * cnt - 4);
1956 8953 break;
1957 2950 case EXT_FILL_DATA:
1958 case EXT_DATA_ELEMENT:
1959 default:
1960 2950 skip_bits_long(gb, 8 * cnt - 4);
1961 2950 break;
1962 };
1963 23684 return res;
1964 }
1965
1966 /**
1967 * channel coupling transformation interface
1968 *
1969 * @param apply_coupling_method pointer to (in)dependent coupling function
1970 */
1971 176590 static void apply_channel_coupling(AACDecContext *ac, ChannelElement *cc,
1972 enum RawDataBlockType type, int elem_id,
1973 enum CouplingPoint coupling_point,
1974 void (*apply_coupling_method)(AACDecContext *ac, SingleChannelElement *target, ChannelElement *cce, int index))
1975 {
1976 int i, c;
1977
1978
2/2
✓ Branch 0 taken 11301760 times.
✓ Branch 1 taken 176590 times.
 11478350 for (i = 0; i < MAX_ELEM_ID; i++) {
1979 11301760 ChannelElement *cce = ac->che[TYPE_CCE][i];
1980 11301760 int index = 0;
1981
1982
4/4
✓ Branch 0 taken 11740 times.
✓ Branch 1 taken 11290020 times.
✓ Branch 2 taken 3915 times.
✓ Branch 3 taken 7825 times.
 11301760 if (cce && cce->coup.coupling_point == coupling_point) {
1983 3915 ChannelCoupling *coup = &cce->coup;
1984
1985
2/2
✓ Branch 0 taken 9402 times.
✓ Branch 1 taken 3915 times.
 13317 for (c = 0; c <= coup->num_coupled; c++) {
1986
4/4
✓ Branch 0 taken 5089 times.
✓ Branch 1 taken 4313 times.
✓ Branch 2 taken 2741 times.
✓ Branch 3 taken 2348 times.
 9402 if (coup->type[c] == type && coup->id_select[c] == elem_id) {
1987
2/2
✓ Branch 0 taken 2561 times.
✓ Branch 1 taken 180 times.
 2741 if (coup->ch_select[c] != 1) {
1988 2561 apply_coupling_method(ac, &cc->ch[0], cce, index);
1989
1/2
✓ Branch 0 taken 2561 times.
✗ Branch 1 not taken.
 2561 if (coup->ch_select[c] != 0)
1990 2561 index++;
1991 }
1992
2/2
✓ Branch 0 taken 2147 times.
✓ Branch 1 taken 594 times.
 2741 if (coup->ch_select[c] != 2)
1993 2147 apply_coupling_method(ac, &cc->ch[1], cce, index++);
1994 } else
1995
2/2
✓ Branch 0 taken 4720 times.
✓ Branch 1 taken 1941 times.
 6661 index += 1 + (coup->ch_select[c] == 3);
1996 }
1997 }
1998 }
1999 176590 }
2000
2001 /**
2002 * Convert spectral data to samples, applying all supported tools as appropriate.
2003 */
2004 50104 static void spectral_to_sample(AACDecContext *ac, int samples)
2005 {
2006 int i, type;
2007 void (*imdct_and_window)(AACDecContext *ac, SingleChannelElement *sce);
2008
3/3
✓ Branch 0 taken 606 times.
✓ Branch 1 taken 16365 times.
✓ Branch 2 taken 33133 times.
 50104 switch (ac->oc[1].m4ac.object_type) {
2009 606 case AOT_ER_AAC_LD:
2010 606 imdct_and_window = ac->dsp.imdct_and_windowing_ld;
2011 606 break;
2012 16365 case AOT_ER_AAC_ELD:
2013 16365 imdct_and_window = ac->dsp.imdct_and_windowing_eld;
2014 16365 break;
2015 33133 default:
2016
2/2
✓ Branch 0 taken 387 times.
✓ Branch 1 taken 32746 times.
 33133 if (ac->oc[1].m4ac.frame_length_short)
2017 387 imdct_and_window = ac->dsp.imdct_and_windowing_960;
2018 else
2019 32746 imdct_and_window = ac->dsp.imdct_and_windowing;
2020 }
2021
2/2
✓ Branch 0 taken 200416 times.
✓ Branch 1 taken 50104 times.
 250520 for (type = 3; type >= 0; type--) {
2022
2/2
✓ Branch 0 taken 12826624 times.
✓ Branch 1 taken 200416 times.
 13027040 for (i = 0; i < MAX_ELEM_ID; i++) {
2023 12826624 ChannelElement *che = ac->che[type][i];
2024
4/4
✓ Branch 0 taken 63479 times.
✓ Branch 1 taken 12763145 times.
✓ Branch 2 taken 63150 times.
✓ Branch 3 taken 329 times.
 12826624 if (che && che->present) {
2025
2/2
✓ Branch 0 taken 58472 times.
✓ Branch 1 taken 4678 times.
 63150 if (type <= TYPE_CPE)
2026 58472 apply_channel_coupling(ac, che, type, i, BEFORE_TNS, ac->dsp.apply_dependent_coupling);
2027
2/2
✓ Branch 0 taken 1784 times.
✓ Branch 1 taken 61366 times.
 63150 if (ac->oc[1].m4ac.object_type == AOT_AAC_LTP) {
2028
2/2
✓ Branch 0 taken 538 times.
✓ Branch 1 taken 1246 times.
 1784 if (che->ch[0].ics.predictor_present) {
2029
2/2
✓ Branch 0 taken 382 times.
✓ Branch 1 taken 156 times.
 538 if (che->ch[0].ics.ltp.present)
2030 382 ac->dsp.apply_ltp(ac, &che->ch[0]);
2031
3/4
✓ Branch 0 taken 404 times.
✓ Branch 1 taken 134 times.
✓ Branch 2 taken 404 times.
✗ Branch 3 not taken.
 538 if (che->ch[1].ics.ltp.present && type == TYPE_CPE)
2032 404 ac->dsp.apply_ltp(ac, &che->ch[1]);
2033 }
2034 }
2035
2/2
✓ Branch 0 taken 4647 times.
✓ Branch 1 taken 58503 times.
 63150 if (che->ch[0].tns.present)
2036 4647 ac->dsp.apply_tns(che->ch[0].coeffs,
2037 &che->ch[0].tns, &che->ch[0].ics, 1);
2038
2/2
✓ Branch 0 taken 2308 times.
✓ Branch 1 taken 60842 times.
 63150 if (che->ch[1].tns.present)
2039 2308 ac->dsp.apply_tns(che->ch[1].coeffs,
2040 &che->ch[1].tns, &che->ch[1].ics, 1);
2041
2/2
✓ Branch 0 taken 58472 times.
✓ Branch 1 taken 4678 times.
 63150 if (type <= TYPE_CPE)
2042 58472 apply_channel_coupling(ac, che, type, i, BETWEEN_TNS_AND_IMDCT, ac->dsp.apply_dependent_coupling);
2043
4/4
✓ Branch 0 taken 1174 times.
✓ Branch 1 taken 61976 times.
✓ Branch 2 taken 393 times.
✓ Branch 3 taken 781 times.
 63150 if (type != TYPE_CCE || che->coup.coupling_point == AFTER_IMDCT) {
2044 62369 imdct_and_window(ac, &che->ch[0]);
2045
2/2
✓ Branch 0 taken 1784 times.
✓ Branch 1 taken 60585 times.
 62369 if (ac->oc[1].m4ac.object_type == AOT_AAC_LTP)
2046 1784 ac->dsp.update_ltp(ac, &che->ch[0]);
2047
2/2
✓ Branch 0 taken 30786 times.
✓ Branch 1 taken 31583 times.
 62369 if (type == TYPE_CPE) {
2048 30786 imdct_and_window(ac, &che->ch[1]);
2049
2/2
✓ Branch 0 taken 1784 times.
✓ Branch 1 taken 29002 times.
 30786 if (ac->oc[1].m4ac.object_type == AOT_AAC_LTP)
2050 1784 ac->dsp.update_ltp(ac, &che->ch[1]);
2051 }
2052
2/2
✓ Branch 0 taken 12411 times.
✓ Branch 1 taken 49958 times.
 62369 if (ac->oc[1].m4ac.sbr > 0) {
2053 12411 ac->proc.sbr_apply(ac, che, type,
2054 12411 che->ch[0].output,
2055 12411 che->ch[1].output);
2056 }
2057 }
2058
2/2
✓ Branch 0 taken 59646 times.
✓ Branch 1 taken 3504 times.
 63150 if (type <= TYPE_CCE)
2059 59646 apply_channel_coupling(ac, che, type, i, AFTER_IMDCT, ac->dsp.apply_independent_coupling);
2060 63150 ac->dsp.clip_output(ac, che, type, samples);
2061 63150 che->present = 0;
2062
2/2
✓ Branch 0 taken 329 times.
✓ Branch 1 taken 12763145 times.
 12763474 } else if (che) {
2063 329 av_log(ac->avctx, AV_LOG_VERBOSE, "ChannelElement %d.%d missing \n", type, i);
2064 }
2065 }
2066 }
2067 50104 }
2068
2069 4114 static int parse_adts_frame_header(AACDecContext *ac, GetBitContext *gb)
2070 {
2071 int size;
2072 AACADTSHeaderInfo hdr_info;
2073 uint8_t layout_map[MAX_ELEM_ID*4][3];
2074 int layout_map_tags, ret;
2075
2076 4114 size = ff_adts_header_parse(gb, &hdr_info);
2077
1/2
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✗ Branch 1 not taken.
 4114 if (size > 0) {
2078
2/4
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 4114 if (!ac->warned_num_aac_frames && hdr_info