FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/aac/aacdec.c
Date: 2024-11-20 23:03:26
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 #if CONFIG_AAC_DECODER
542 9 ff_aac_usac_reset_state(ac, &ac->oc[1]);
543 #endif
544 9 }
545
546 /**
547 * Set up channel positions based on a default channel configuration
548 * as specified in table 1.17.
549 *
550 * @return Returns error status. 0 - OK, !0 - error
551 */
552 4661 int ff_aac_set_default_channel_config(AACDecContext *ac, AVCodecContext *avctx,
553 uint8_t (*layout_map)[3],
554 int *tags,
555 int channel_config)
556 {
557
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 4661 if (channel_config < 1 || (channel_config > 7 && channel_config < 11) ||
558 channel_config > 14) {
559 ✗ av_log(avctx, AV_LOG_ERROR,
560 "invalid default channel configuration (%d)\n",
561 channel_config);
562 ✗ return AVERROR_INVALIDDATA;
563 }
564 4661 *tags = ff_tags_per_config[channel_config];
565 4661 memcpy(layout_map, ff_aac_channel_layout_map[channel_config - 1],
566 4661 *tags * sizeof(*layout_map));
567
568 /*
569 * AAC specification has 7.1(wide) as a default layout for 8-channel streams.
570 * However, at least Nero AAC encoder encodes 7.1 streams using the default
571 * channel config 7, mapping the side channels of the original audio stream
572 * to the second AAC_CHANNEL_FRONT pair in the AAC stream. Similarly, e.g. FAAD
573 * decodes the second AAC_CHANNEL_FRONT pair as side channels, therefore decoding
574 * the incorrect streams as if they were correct (and as the encoder intended).
575 *
576 * As actual intended 7.1(wide) streams are very rare, default to assuming a
577 * 7.1 layout was intended.
578 */
579
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 4661 if (channel_config == 7 && avctx->strict_std_compliance < FF_COMPLIANCE_STRICT) {
580 ✗ layout_map[2][2] = AAC_CHANNEL_BACK;
581
582 ✗ if (!ac || !ac->warned_71_wide++) {
583 ✗ av_log(avctx, AV_LOG_INFO, "Assuming an incorrectly encoded 7.1 channel layout"
584 " instead of a spec-compliant 7.1(wide) layout, use -strict %d to decode"
585 " according to the specification instead.\n", FF_COMPLIANCE_STRICT);
586 }
587 }
588
589 4661 return 0;
590 }
591
592 67038 ChannelElement *ff_aac_get_che(AACDecContext *ac, int type, int elem_id)
593 {
594 /* For PCE based channel configurations map the channels solely based
595 * on tags. */
596
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 67038 if (!ac->oc[1].m4ac.chan_config) {
597 24124 return ac->tag_che_map[type][elem_id];
598 }
599 // Allow single CPE stereo files to be signalled with mono configuration.
600
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 42914 if (!ac->tags_mapped && type == TYPE_CPE &&
601
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 24528 ac->oc[1].m4ac.chan_config == 1) {
602 uint8_t layout_map[MAX_ELEM_ID*4][3];
603 int layout_map_tags;
604 ✗ push_output_configuration(ac);
605
606 ✗ av_log(ac->avctx, AV_LOG_DEBUG, "mono with CPE\n");
607
608 ✗ if (ff_aac_set_default_channel_config(ac, ac->avctx, layout_map,
609 &layout_map_tags, 2) < 0)
610 ✗ return NULL;
611 ✗ if (ff_aac_output_configure(ac, layout_map, layout_map_tags,
612 OC_TRIAL_FRAME, 1) < 0)
613 ✗ return NULL;
614
615 ✗ ac->oc[1].m4ac.chan_config = 2;
616 ✗ ac->oc[1].m4ac.ps = 0;
617 }
618 // And vice-versa
619
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 42914 if (!ac->tags_mapped && type == TYPE_SCE &&
620
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 15926 ac->oc[1].m4ac.chan_config == 2) {
621 uint8_t layout_map[MAX_ELEM_ID * 4][3];
622 int layout_map_tags;
623 ✗ push_output_configuration(ac);
624
625 ✗ av_log(ac->avctx, AV_LOG_DEBUG, "stereo with SCE\n");
626
627 ✗ layout_map_tags = 2;
628 ✗ layout_map[0][0] = layout_map[1][0] = TYPE_SCE;
629 ✗ layout_map[0][2] = layout_map[1][2] = AAC_CHANNEL_FRONT;
630 ✗ layout_map[0][1] = 0;
631 ✗ layout_map[1][1] = 1;
632 ✗ if (ff_aac_output_configure(ac, layout_map, layout_map_tags,
633 OC_TRIAL_FRAME, 1) < 0)
634 ✗ return NULL;
635
636 ✗ if (ac->oc[1].m4ac.sbr)
637 ✗ ac->oc[1].m4ac.ps = -1;
638 }
639 /* For indexed channel configurations map the channels solely based
640 * on position. */
641
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 42914 switch (ac->oc[1].m4ac.chan_config) {
642 ✗ case 14:
643 ✗ if (ac->tags_mapped > 2 && ((type == TYPE_CPE && elem_id < 3) ||
644 ✗ (type == TYPE_LFE && elem_id < 1))) {
645 ✗ ac->tags_mapped++;
646 ✗ return ac->tag_che_map[type][elem_id] = ac->che[type][elem_id];
647 }
648 case 13:
649 ✗ if (ac->tags_mapped > 3 && ((type == TYPE_CPE && elem_id < 8) ||
650 ✗ (type == TYPE_SCE && elem_id < 6) ||
651 ✗ (type == TYPE_LFE && elem_id < 2))) {
652 ✗ ac->tags_mapped++;
653 ✗ return ac->tag_che_map[type][elem_id] = ac->che[type][elem_id];
654 }
655 case 12:
656 case 7:
657 ✗ if (ac->tags_mapped == 3 && type == TYPE_CPE) {
658 ✗ ac->tags_mapped++;
659 ✗ return ac->tag_che_map[TYPE_CPE][elem_id] = ac->che[TYPE_CPE][2];
660 }
661 case 11:
662 ✗ if (ac->tags_mapped == 3 && type == TYPE_SCE) {
663 ✗ ac->tags_mapped++;
664 ✗ return ac->tag_che_map[TYPE_SCE][elem_id] = ac->che[TYPE_SCE][1];
665 }
666 case 6:
667 /* Some streams incorrectly code 5.1 audio as
668 * SCE[0] CPE[0] CPE[1] SCE[1]
669 * instead of
670 * SCE[0] CPE[0] CPE[1] LFE[0].
671 * If we seem to have encountered such a stream, transfer
672 * the LFE[0] element to the SCE[1]'s mapping */
673
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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)) {
674
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 820 if (!ac->warned_remapping_once && (type != TYPE_LFE || elem_id != 0)) {
675 ✗ av_log(ac->avctx, AV_LOG_WARNING,
676 "This stream seems to incorrectly report its last channel as %s[%d], mapping to LFE[0]\n",
677 type == TYPE_SCE ? "SCE" : "LFE", elem_id);
678 ✗ ac->warned_remapping_once++;
679 }
680 820 ac->tags_mapped++;
681 820 return ac->tag_che_map[type][elem_id] = ac->che[TYPE_LFE][0];
682 }
683 case 5:
684
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 2460 if (ac->tags_mapped == 2 && type == TYPE_CPE) {
685 820 ac->tags_mapped++;
686 820 return ac->tag_che_map[TYPE_CPE][elem_id] = ac->che[TYPE_CPE][1];
687 }
688 case 4:
689 /* Some streams incorrectly code 4.0 audio as
690 * SCE[0] CPE[0] LFE[0]
691 * instead of
692 * SCE[0] CPE[0] SCE[1].
693 * If we seem to have encountered such a stream, transfer
694 * the SCE[1] element to the LFE[0]'s mapping */
695
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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)) {
696 ✗ if (!ac->warned_remapping_once && (type != TYPE_SCE || elem_id != 1)) {
697 ✗ av_log(ac->avctx, AV_LOG_WARNING,
698 "This stream seems to incorrectly report its last channel as %s[%d], mapping to SCE[1]\n",
699 type == TYPE_SCE ? "SCE" : "LFE", elem_id);
700 ✗ ac->warned_remapping_once++;
701 }
702 ✗ ac->tags_mapped++;
703 ✗ return ac->tag_che_map[type][elem_id] = ac->che[TYPE_SCE][1];
704 }
705
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 1640 if (ac->tags_mapped == 2 &&
706 ✗ ac->oc[1].m4ac.chan_config == 4 &&
707 type == TYPE_SCE) {
708 ✗ ac->tags_mapped++;
709 ✗ return ac->tag_che_map[TYPE_SCE][elem_id] = ac->che[TYPE_SCE][1];
710 }
711 case 3:
712 case 2:
713
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 26168 if (ac->tags_mapped == (ac->oc[1].m4ac.chan_config != 2) &&
714 type == TYPE_CPE) {
715 25348 ac->tags_mapped++;
716 25348 return ac->tag_che_map[TYPE_CPE][elem_id] = ac->che[TYPE_CPE][0];
717
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 820 } else if (ac->tags_mapped == 1 && ac->oc[1].m4ac.chan_config == 2 &&
718 type == TYPE_SCE) {
719 ✗ ac->tags_mapped++;
720 ✗ return ac->tag_che_map[TYPE_SCE][elem_id] = ac->che[TYPE_SCE][1];
721 }
722 case 1:
723
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 15926 if (!ac->tags_mapped && type == TYPE_SCE) {
724 15926 ac->tags_mapped++;
725 15926 return ac->tag_che_map[TYPE_SCE][elem_id] = ac->che[TYPE_SCE][0];
726 }
727 default:
728 ✗ return NULL;
729 }
730 }
731
732 /**
733 * Decode an array of 4 bit element IDs, optionally interleaved with a
734 * stereo/mono switching bit.
735 *
736 * @param type speaker type/position for these channels
737 */
738 215 static void decode_channel_map(uint8_t layout_map[][3],
739 enum ChannelPosition type,
740 GetBitContext *gb, int n)
741 {
742
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 310 while (n--) {
743 enum RawDataBlockType syn_ele;
744
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 95 switch (type) {
745 75 case AAC_CHANNEL_FRONT:
746 case AAC_CHANNEL_BACK:
747 case AAC_CHANNEL_SIDE:
748 75 syn_ele = get_bits1(gb);
749 75 break;
750 8 case AAC_CHANNEL_CC:
751 8 skip_bits1(gb);
752 8 syn_ele = TYPE_CCE;
753 8 break;
754 12 case AAC_CHANNEL_LFE:
755 12 syn_ele = TYPE_LFE;
756 12 break;
757 ✗ default:
758 // AAC_CHANNEL_OFF has no channel map
759 ✗ av_assert0(0);
760 }
761 95 layout_map[0][0] = syn_ele;
762 95 layout_map[0][1] = get_bits(gb, 4);
763 95 layout_map[0][2] = type;
764 95 layout_map++;
765 }
766 215 }
767
768 43 static inline void relative_align_get_bits(GetBitContext *gb,
769 int reference_position) {
770 43 int n = (reference_position - get_bits_count(gb) & 7);
771
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 43 if (n)
772 39 skip_bits(gb, n);
773 43 }
774
775 /**
776 * Decode program configuration element; reference: table 4.2.
777 *
778 * @return Returns error status. 0 - OK, !0 - error
779 */
780 43 static int decode_pce(AVCodecContext *avctx, MPEG4AudioConfig *m4ac,
781 uint8_t (*layout_map)[3],
782 GetBitContext *gb, int byte_align_ref)
783 {
784 int num_front, num_side, num_back, num_lfe, num_assoc_data, num_cc;
785 int sampling_index;
786 int comment_len;
787 int tags;
788
789 43 skip_bits(gb, 2); // object_type
790
791 43 sampling_index = get_bits(gb, 4);
792
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 43 if (m4ac->sampling_index != sampling_index)
793 ✗ av_log(avctx, AV_LOG_WARNING,
794 "Sample rate index in program config element does not "
795 "match the sample rate index configured by the container.\n");
796
797 43 num_front = get_bits(gb, 4);
798 43 num_side = get_bits(gb, 4);
799 43 num_back = get_bits(gb, 4);
800 43 num_lfe = get_bits(gb, 2);
801 43 num_assoc_data = get_bits(gb, 3);
802 43 num_cc = get_bits(gb, 4);
803
804
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 43 if (get_bits1(gb))
805 ✗ skip_bits(gb, 4); // mono_mixdown_tag
806
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 43 if (get_bits1(gb))
807 ✗ skip_bits(gb, 4); // stereo_mixdown_tag
808
809
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 43 if (get_bits1(gb))
810 ✗ skip_bits(gb, 3); // mixdown_coeff_index and pseudo_surround
811
812
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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)) {
813 ✗ av_log(avctx, AV_LOG_ERROR, "decode_pce: " overread_err);
814 ✗ return -1;
815 }
816 43 decode_channel_map(layout_map , AAC_CHANNEL_FRONT, gb, num_front);
817 43 tags = num_front;
818 43 decode_channel_map(layout_map + tags, AAC_CHANNEL_SIDE, gb, num_side);
819 43 tags += num_side;
820 43 decode_channel_map(layout_map + tags, AAC_CHANNEL_BACK, gb, num_back);
821 43 tags += num_back;
822 43 decode_channel_map(layout_map + tags, AAC_CHANNEL_LFE, gb, num_lfe);
823 43 tags += num_lfe;
824
825 43 skip_bits_long(gb, 4 * num_assoc_data);
826
827 43 decode_channel_map(layout_map + tags, AAC_CHANNEL_CC, gb, num_cc);
828 43 tags += num_cc;
829
830 43 relative_align_get_bits(gb, byte_align_ref);
831
832 /* comment field, first byte is length */
833 43 comment_len = get_bits(gb, 8) * 8;
834
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 43 if (get_bits_left(gb) < comment_len) {
835 ✗ av_log(avctx, AV_LOG_ERROR, "decode_pce: " overread_err);
836 ✗ return AVERROR_INVALIDDATA;
837 }
838 43 skip_bits_long(gb, comment_len);
839 43 return tags;
840 }
841
842 /**
843 * Decode GA "General Audio" specific configuration; reference: table 4.1.
844 *
845 * @param ac pointer to AACDecContext, may be null
846 * @param avctx pointer to AVCCodecContext, used for logging
847 *
848 * @return Returns error status. 0 - OK, !0 - error
849 */
850 552 static int decode_ga_specific_config(AACDecContext *ac, AVCodecContext *avctx,
851 GetBitContext *gb,
852 int get_bit_alignment,
853 MPEG4AudioConfig *m4ac,
854 int channel_config)
855 {
856 int extension_flag, ret, ep_config, res_flags;
857 uint8_t layout_map[MAX_ELEM_ID*4][3];
858 552 int tags = 0;
859
860 552 m4ac->frame_length_short = get_bits1(gb);
861
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 552 if (m4ac->frame_length_short && m4ac->sbr == 1) {
862 ✗ avpriv_report_missing_feature(avctx, "SBR with 960 frame length");
863 ✗ if (ac) ac->warned_960_sbr = 1;
864 ✗ m4ac->sbr = 0;
865 ✗ m4ac->ps = 0;
866 }
867
868
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 552 if (get_bits1(gb)) // dependsOnCoreCoder
869 ✗ skip_bits(gb, 14); // coreCoderDelay
870 552 extension_flag = get_bits1(gb);
871
872
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 552 if (m4ac->object_type == AOT_AAC_SCALABLE ||
873
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 552 m4ac->object_type == AOT_ER_AAC_SCALABLE)
874 ✗ skip_bits(gb, 3); // layerNr
875
876
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 552 if (channel_config == 0) {
877 43 skip_bits(gb, 4); // element_instance_tag
878 43 tags = decode_pce(avctx, m4ac, layout_map, gb, get_bit_alignment);
879
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 43 if (tags < 0)
880 ✗ return tags;
881 } else {
882
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 509 if ((ret = ff_aac_set_default_channel_config(ac, avctx, layout_map,
883 &tags, channel_config)))
884 ✗ return ret;
885 }
886
887
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 552 if (count_channels(layout_map, tags) > 1) {
888 460 m4ac->ps = 0;
889
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 92 } else if (m4ac->sbr == 1 && m4ac->ps == -1)
890 18 m4ac->ps = 1;
891
892
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 552 if (ac && (ret = ff_aac_output_configure(ac, layout_map, tags, OC_GLOBAL_HDR, 0)))
893 ✗ return ret;
894
895
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 552 if (extension_flag) {
896
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 4 switch (m4ac->object_type) {
897 ✗ case AOT_ER_BSAC:
898 ✗ skip_bits(gb, 5); // numOfSubFrame
899 ✗ skip_bits(gb, 11); // layer_length
900 ✗ break;
901 4 case AOT_ER_AAC_LC:
902 case AOT_ER_AAC_LTP:
903 case AOT_ER_AAC_SCALABLE:
904 case AOT_ER_AAC_LD:
905 4 res_flags = get_bits(gb, 3);
906
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 4 if (res_flags) {
907 ✗ avpriv_report_missing_feature(avctx,
908 "AAC data resilience (flags %x)",
909 res_flags);
910 ✗ return AVERROR_PATCHWELCOME;
911 }
912 4 break;
913 }
914 4 skip_bits1(gb); // extensionFlag3 (TBD in version 3)
915 }
916
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 552 switch (m4ac->object_type) {
917 4 case AOT_ER_AAC_LC:
918 case AOT_ER_AAC_LTP:
919 case AOT_ER_AAC_SCALABLE:
920 case AOT_ER_AAC_LD:
921 4 ep_config = get_bits(gb, 2);
922
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 4 if (ep_config) {
923 ✗ avpriv_report_missing_feature(avctx,
924 "epConfig %d", ep_config);
925 ✗ return AVERROR_PATCHWELCOME;
926 }
927 }
928 552 return 0;
929 }
930
931 10 static int decode_eld_specific_config(AACDecContext *ac, AVCodecContext *avctx,
932 GetBitContext *gb,
933 MPEG4AudioConfig *m4ac,
934 int channel_config)
935 {
936 int ret, ep_config, res_flags;
937 uint8_t layout_map[MAX_ELEM_ID*4][3];
938 10 int tags = 0;
939 10 const int ELDEXT_TERM = 0;
940
941 10 m4ac->ps = 0;
942 10 m4ac->sbr = 0;
943 10 m4ac->frame_length_short = get_bits1(gb);
944
945 10 res_flags = get_bits(gb, 3);
946
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 10 if (res_flags) {
947 ✗ avpriv_report_missing_feature(avctx,
948 "AAC data resilience (flags %x)",
949 res_flags);
950 ✗ return AVERROR_PATCHWELCOME;
951 }
952
953
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 10 if (get_bits1(gb)) { // ldSbrPresentFlag
954 ✗ avpriv_report_missing_feature(avctx,
955 "Low Delay SBR");
956 ✗ return AVERROR_PATCHWELCOME;
957 }
958
959
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 10 while (get_bits(gb, 4) != ELDEXT_TERM) {
960 ✗ int len = get_bits(gb, 4);
961 ✗ if (len == 15)
962 ✗ len += get_bits(gb, 8);
963 ✗ if (len == 15 + 255)
964 ✗ len += get_bits(gb, 16);
965 ✗ if (get_bits_left(gb) < len * 8 + 4) {
966 ✗ av_log(avctx, AV_LOG_ERROR, overread_err);
967 ✗ return AVERROR_INVALIDDATA;
968 }
969 ✗ skip_bits_long(gb, 8 * len);
970 }
971
972
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 10 if ((ret = ff_aac_set_default_channel_config(ac, avctx, layout_map,
973 &tags, channel_config)))
974 ✗ return ret;
975
976
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 10 if (ac && (ret = ff_aac_output_configure(ac, layout_map, tags, OC_GLOBAL_HDR, 0)))
977 ✗ return ret;
978
979 10 ep_config = get_bits(gb, 2);
980
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 10 if (ep_config) {
981 ✗ avpriv_report_missing_feature(avctx,
982 "epConfig %d", ep_config);
983 ✗ return AVERROR_PATCHWELCOME;
984 }
985 10 return 0;
986 }
987
988 /**
989 * Decode audio specific configuration; reference: table 1.13.
990 *
991 * @param ac pointer to AACDecContext, may be null
992 * @param avctx pointer to AVCCodecContext, used for logging
993 * @param m4ac pointer to MPEG4AudioConfig, used for parsing
994 * @param gb buffer holding an audio specific config
995 * @param get_bit_alignment relative alignment for byte align operations
996 * @param sync_extension look for an appended sync extension
997 *
998 * @return Returns error status or number of consumed bits. <0 - error
999 */
1000 566 static int decode_audio_specific_config_gb(AACDecContext *ac,
1001 AVCodecContext *avctx,
1002 OutputConfiguration *oc,
1003 GetBitContext *gb,
1004 int get_bit_alignment,
1005 int sync_extension)
1006 {
1007 int i, ret;
1008 566 GetBitContext gbc = *gb;
1009 566 MPEG4AudioConfig *m4ac = &oc->m4ac;
1010 566 MPEG4AudioConfig m4ac_bak = *m4ac;
1011
1012
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 566 if ((i = ff_mpeg4audio_get_config_gb(m4ac, &gbc, sync_extension, avctx)) < 0) {
1013 ✗ *m4ac = m4ac_bak;
1014 ✗ return AVERROR_INVALIDDATA;
1015 }
1016
1017
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 566 if (m4ac->sampling_index > 12) {
1018 ✗ av_log(avctx, AV_LOG_ERROR,
1019 "invalid sampling rate index %d\n",
1020 m4ac->sampling_index);
1021 ✗ *m4ac = m4ac_bak;
1022 ✗ return AVERROR_INVALIDDATA;
1023 }
1024
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 566 if (m4ac->object_type == AOT_ER_AAC_LD &&
1025
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 4 (m4ac->sampling_index < 3 || m4ac->sampling_index > 7)) {
1026 ✗ av_log(avctx, AV_LOG_ERROR,
1027 "invalid low delay sampling rate index %d\n",
1028 m4ac->sampling_index);
1029 ✗ *m4ac = m4ac_bak;
1030 ✗ return AVERROR_INVALIDDATA;
1031 }
1032
1033 566 skip_bits_long(gb, i);
1034
1035
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 566 switch (m4ac->object_type) {
1036 552 case AOT_AAC_MAIN:
1037 case AOT_AAC_LC:
1038 case AOT_AAC_SSR:
1039 case AOT_AAC_LTP:
1040 case AOT_ER_AAC_LC:
1041 case AOT_ER_AAC_LD:
1042
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 552 if ((ret = decode_ga_specific_config(ac, avctx, gb, get_bit_alignment,
1043 &oc->m4ac, m4ac->chan_config)) < 0)
1044 ✗ return ret;
1045 552 break;
1046 10 case AOT_ER_AAC_ELD:
1047
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 10 if ((ret = decode_eld_specific_config(ac, avctx, gb,
1048 &oc->m4ac, m4ac->chan_config)) < 0)
1049 ✗ return ret;
1050 10 break;
1051 #if CONFIG_AAC_DECODER
1052 4 case AOT_USAC:
1053
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 4 if ((ret = ff_aac_usac_config_decode(ac, avctx, gb,
1054 oc, m4ac->chan_config)) < 0)
1055 ✗ return ret;
1056 4 break;
1057 #endif
1058 ✗ default:
1059 ✗ avpriv_report_missing_feature(avctx,
1060 "Audio object type %s%d",
1061 ✗ m4ac->sbr == 1 ? "SBR+" : "",
1062 m4ac->object_type);
1063 ✗ return AVERROR(ENOSYS);
1064 }
1065
1066 ff_dlog(avctx,
1067 "AOT %d chan config %d sampling index %d (%d) SBR %d PS %d\n",
1068 m4ac->object_type, m4ac->chan_config, m4ac->sampling_index,
1069 m4ac->sample_rate, m4ac->sbr,
1070 m4ac->ps);
1071
1072 566 return get_bits_count(gb);
1073 }
1074
1075 244 static int decode_audio_specific_config(AACDecContext *ac,
1076 AVCodecContext *avctx,
1077 OutputConfiguration *oc,
1078 const uint8_t *data, int64_t bit_size,
1079 int sync_extension)
1080 {
1081 int i, ret;
1082 GetBitContext gb;
1083
1084
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 244 if (bit_size < 0 || bit_size > INT_MAX) {
1085 ✗ av_log(avctx, AV_LOG_ERROR, "Audio specific config size is invalid\n");
1086 ✗ return AVERROR_INVALIDDATA;
1087 }
1088
1089 ff_dlog(avctx, "audio specific config size %d\n", (int)bit_size >> 3);
1090
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 1657 for (i = 0; i < bit_size >> 3; i++)
1091 ff_dlog(avctx, "%02x ", data[i]);
1092 ff_dlog(avctx, "\n");
1093
1094
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 244 if ((ret = init_get_bits(&gb, data, bit_size)) < 0)
1095 ✗ return ret;
1096
1097 244 return decode_audio_specific_config_gb(ac, avctx, oc, &gb, 0,
1098 sync_extension);
1099 }
1100
1101 298 static av_cold int decode_close(AVCodecContext *avctx)
1102 {
1103 298 AACDecContext *ac = avctx->priv_data;
1104
1105
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 894 for (int i = 0; i < 2; i++) {
1106 596 OutputConfiguration *oc = &ac->oc[i];
1107 596 AACUSACConfig *usac = &oc->usac;
1108
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 604 for (int j = 0; j < usac->nb_elems; j++) {
1109 8 AACUsacElemConfig *ec = &usac->elems[j];
1110 8 av_freep(&ec->ext.pl_data);
1111 }
1112 }
1113
1114
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 1490 for (int type = 0; type < FF_ARRAY_ELEMS(ac->che); type++) {
1115
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 77480 for (int i = 0; i < MAX_ELEM_ID; i++) {
1116
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 76288 if (ac->che[type][i]) {
1117 376 ac->proc.sbr_ctx_close(ac->che[type][i]);
1118 376 av_freep(&ac->che[type][i]);
1119 }
1120 }
1121 }
1122
1123 298 av_tx_uninit(&ac->mdct96);
1124 298 av_tx_uninit(&ac->mdct120);
1125 298 av_tx_uninit(&ac->mdct128);
1126 298 av_tx_uninit(&ac->mdct480);
1127 298 av_tx_uninit(&ac->mdct512);
1128 298 av_tx_uninit(&ac->mdct768);
1129 298 av_tx_uninit(&ac->mdct960);
1130 298 av_tx_uninit(&ac->mdct1024);
1131 298 av_tx_uninit(&ac->mdct_ltp);
1132
1133 // Compiler will optimize this branch away.
1134
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 298 if (ac->is_fixed)
1135 23 av_freep(&ac->RENAME_FIXED(fdsp));
1136 else
1137 275 av_freep(&ac->fdsp);
1138
1139 298 return 0;
1140 }
1141
1142 298 static av_cold int init_dsp(AVCodecContext *avctx)
1143 {
1144 298 AACDecContext *ac = avctx->priv_data;
1145 298 int is_fixed = ac->is_fixed, ret;
1146 float scale_fixed, scale_float;
1147
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 298 const float *const scalep = is_fixed ? &scale_fixed : &scale_float;
1148
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 298 enum AVTXType tx_type = is_fixed ? AV_TX_INT32_MDCT : AV_TX_FLOAT_MDCT;
1149
1150 #define MDCT_INIT(s, fn, len, sval) \
1151 scale_fixed = (sval) * 128.0f; \
1152 scale_float = (sval) / 32768.0f; \
1153 ret = av_tx_init(&s, &fn, tx_type, 1, len, scalep, 0); \
1154 if (ret < 0) \
1155 return ret
1156
1157
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 298 MDCT_INIT(ac->mdct96, ac->mdct96_fn, 96, 1.0/96);
1158
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 298 MDCT_INIT(ac->mdct120, ac->mdct120_fn, 120, 1.0/120);
1159
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 298 MDCT_INIT(ac->mdct128, ac->mdct128_fn, 128, 1.0/128);
1160
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 298 MDCT_INIT(ac->mdct480, ac->mdct480_fn, 480, 1.0/480);
1161
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 298 MDCT_INIT(ac->mdct512, ac->mdct512_fn, 512, 1.0/512);
1162
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 298 MDCT_INIT(ac->mdct768, ac->mdct768_fn, 768, 1.0/768);
1163
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 298 MDCT_INIT(ac->mdct960, ac->mdct960_fn, 960, 1.0/960);
1164
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 298 MDCT_INIT(ac->mdct1024, ac->mdct1024_fn, 1024, 1.0/1024);
1165 #undef MDCT_INIT
1166
1167 /* LTP forward MDCT */
1168 298 scale_fixed = -1.0;
1169 298 scale_float = -32786.0*2 + 36;
1170 298 ret = av_tx_init(&ac->mdct_ltp, &ac->mdct_ltp_fn, tx_type, 0, 1024, scalep, 0);
1171
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 298 if (ret < 0)
1172 ✗ return ret;
1173
1174 298 return 0;
1175 }
1176
1177 298 av_cold int ff_aac_decode_init(AVCodecContext *avctx)
1178 {
1179 298 AACDecContext *ac = avctx->priv_data;
1180 int ret;
1181
1182
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 298 if (avctx->sample_rate > 96000)
1183 ✗ return AVERROR_INVALIDDATA;
1184
1185 298 ff_aacdec_common_init_once();
1186
1187 298 ac->avctx = avctx;
1188 298 ac->oc[1].m4ac.sample_rate = avctx->sample_rate;
1189
1190
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 298 if (avctx->extradata_size > 0) {
1191
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 236 if ((ret = decode_audio_specific_config(ac, ac->avctx, &ac->oc[1],
1192 236 avctx->extradata,
1193 236 avctx->extradata_size * 8LL,
1194 1)) < 0)
1195 ✗ return ret;
1196 } else {
1197 int sr, i;
1198 uint8_t layout_map[MAX_ELEM_ID*4][3];
1199 int layout_map_tags;
1200
1201 62 sr = ff_aac_sample_rate_idx(avctx->sample_rate);
1202 62 ac->oc[1].m4ac.sampling_index = sr;
1203 62 ac->oc[1].m4ac.channels = avctx->ch_layout.nb_channels;
1204 62 ac->oc[1].m4ac.sbr = -1;
1205 62 ac->oc[1].m4ac.ps = -1;
1206
1207
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 110 for (i = 0; i < FF_ARRAY_ELEMS(ff_mpeg4audio_channels); i++)
1208
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 110 if (ff_mpeg4audio_channels[i] == avctx->ch_layout.nb_channels)
1209 62 break;
1210
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 62 if (i == FF_ARRAY_ELEMS(ff_mpeg4audio_channels)) {
1211 ✗ i = 0;
1212 }
1213 62 ac->oc[1].m4ac.chan_config = i;
1214
1215
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 62 if (ac->oc[1].m4ac.chan_config) {
1216 24 int ret = ff_aac_set_default_channel_config(ac, avctx, layout_map,
1217 &layout_map_tags,
1218 ac->oc[1].m4ac.chan_config);
1219
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 24 if (!ret)
1220 24 ff_aac_output_configure(ac, layout_map, layout_map_tags,
1221 OC_GLOBAL_HDR, 0);
1222 ✗ else if (avctx->err_recognition & AV_EF_EXPLODE)
1223 ✗ return AVERROR_INVALIDDATA;
1224 }
1225 }
1226
1227
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 298 if (avctx->ch_layout.nb_channels > MAX_CHANNELS) {
1228 ✗ av_log(avctx, AV_LOG_ERROR, "Too many channels\n");
1229 ✗ return AVERROR_INVALIDDATA;
1230 }
1231
1232 298 ac->random_state = 0x1f2e3d4c;
1233
1234 298 return init_dsp(avctx);
1235 }
1236
1237 /**
1238 * Skip data_stream_element; reference: table 4.10.
1239 */
1240 2821 static int skip_data_stream_element(AACDecContext *ac, GetBitContext *gb)
1241 {
1242 2821 int byte_align = get_bits1(gb);
1243 2821 int count = get_bits(gb, 8);
1244
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 2821 if (count == 255)
1245 ✗ count += get_bits(gb, 8);
1246
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 2821 if (byte_align)
1247 2454 align_get_bits(gb);
1248
1249
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 2821 if (get_bits_left(gb) < 8 * count) {
1250 ✗ av_log(ac->avctx, AV_LOG_ERROR, "skip_data_stream_element: "overread_err);
1251 ✗ return AVERROR_INVALIDDATA;
1252 }
1253 2821 skip_bits_long(gb, 8 * count);
1254 2821 return 0;
1255 }
1256
1257 1426 static int decode_prediction(AACDecContext *ac, IndividualChannelStream *ics,
1258 GetBitContext *gb)
1259 {
1260 int sfb;
1261
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 1426 if (get_bits1(gb)) {
1262 359 ics->predictor_reset_group = get_bits(gb, 5);
1263
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 359 if (ics->predictor_reset_group == 0 ||
1264
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 359 ics->predictor_reset_group > 30) {
1265 ✗ av_log(ac->avctx, AV_LOG_ERROR,
1266 "Invalid Predictor Reset Group.\n");
1267 ✗ return AVERROR_INVALIDDATA;
1268 }
1269 }
1270
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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++) {
1271 46375 ics->prediction_used[sfb] = get_bits1(gb);
1272 }
1273 1426 return 0;
1274 }
1275
1276 /**
1277 * Decode Long Term Prediction data; reference: table 4.xx.
1278 */
1279 786 static void decode_ltp(AACDecContext *ac, LongTermPrediction *ltp,
1280 GetBitContext *gb, uint8_t max_sfb)
1281 {
1282 int sfb;
1283
1284 786 ltp->lag = get_bits(gb, 11);
1285
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 786 if (CONFIG_AAC_FIXED_DECODER && ac->is_fixed)
1286 393 ltp->coef_fixed = Q30(ff_ltp_coef[get_bits(gb, 3)]);
1287 else if (CONFIG_AAC_DECODER)
1288 393 ltp->coef = ff_ltp_coef[get_bits(gb, 3)];
1289
1290
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 32226 for (sfb = 0; sfb < FFMIN(max_sfb, MAX_LTP_LONG_SFB); sfb++)
1291 31440 ltp->used[sfb] = get_bits1(gb);
1292 786 }
1293
1294 /**
1295 * Decode Individual Channel Stream info; reference: table 4.6.
1296 */
1297 63372 static int decode_ics_info(AACDecContext *ac, IndividualChannelStream *ics,
1298 GetBitContext *gb)
1299 {
1300 63372 const MPEG4AudioConfig *const m4ac = &ac->oc[1].m4ac;
1301 63372 const int aot = m4ac->object_type;
1302 63372 const int sampling_index = m4ac->sampling_index;
1303 63372 int ret_fail = AVERROR_INVALIDDATA;
1304
1305
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 63372 if (aot != AOT_ER_AAC_ELD) {
1306
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 47007 if (get_bits1(gb)) {
1307 ✗ av_log(ac->avctx, AV_LOG_ERROR, "Reserved bit set.\n");
1308 ✗ if (ac->avctx->err_recognition & AV_EF_BITSTREAM)
1309 ✗ return AVERROR_INVALIDDATA;
1310 }
1311 47007 ics->window_sequence[1] = ics->window_sequence[0];
1312 47007 ics->window_sequence[0] = get_bits(gb, 2);
1313
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 47007 if (aot == AOT_ER_AAC_LD &&
1314
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 2424 ics->window_sequence[0] != ONLY_LONG_SEQUENCE) {
1315 ✗ av_log(ac->avctx, AV_LOG_ERROR,
1316 "AAC LD is only defined for ONLY_LONG_SEQUENCE but "
1317 ✗ "window sequence %d found.\n", ics->window_sequence[0]);
1318 ✗ ics->window_sequence[0] = ONLY_LONG_SEQUENCE;
1319 ✗ return AVERROR_INVALIDDATA;
1320 }
1321 47007 ics->use_kb_window[1] = ics->use_kb_window[0];
1322 47007 ics->use_kb_window[0] = get_bits1(gb);
1323 }
1324 63372 ics->prev_num_window_groups = FFMAX(ics->num_window_groups, 1);
1325 63372 ics->num_window_groups = 1;
1326 63372 ics->group_len[0] = 1;
1327
2/2
✓ Branch 0 taken 1331 times.
✓ Branch 1 taken 62041 times.
 63372 if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
1328 int i;
1329 1331 ics->max_sfb = get_bits(gb, 4);
1330
2/2
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✓ Branch 1 taken 1331 times.
 10648 for (i = 0; i < 7; i++) {
1331
2/2
✓ Branch 1 taken 5889 times.
✓ Branch 2 taken 3428 times.
 9317 if (get_bits1(gb)) {
1332 5889 ics->group_len[ics->num_window_groups - 1]++;
1333 } else {
1334 3428 ics->num_window_groups++;
1335 3428 ics->group_len[ics->num_window_groups - 1] = 1;
1336 }
1337 }
1338 1331 ics->num_windows = 8;
1339
2/2
✓ Branch 0 taken 1 times.
✓ Branch 1 taken 1330 times.
 1331 if (m4ac->frame_length_short) {
1340 1 ics->swb_offset = ff_swb_offset_120[sampling_index];
1341 1 ics->num_swb = ff_aac_num_swb_120[sampling_index];
1342 } else {
1343 1330 ics->swb_offset = ff_swb_offset_128[sampling_index];
1344 1330 ics->num_swb = ff_aac_num_swb_128[sampling_index];
1345 }
1346 1331 ics->tns_max_bands = ff_tns_max_bands_128[sampling_index];
1347 1331 ics->predictor_present = 0;
1348 } else {
1349 62041 ics->max_sfb = get_bits(gb, 6);
1350 62041 ics->num_windows = 1;
1351
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) {
1352
2/2
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✓ Branch 1 taken 15230 times.
 18789 if (m4ac->frame_length_short) {
1353 3559 ics->swb_offset = ff_swb_offset_480[sampling_index];
1354 3559 ics->num_swb = ff_aac_num_swb_480[sampling_index];
1355 3559 ics->tns_max_bands = ff_tns_max_bands_480[sampling_index];
1356 } else {
1357 15230 ics->swb_offset = ff_swb_offset_512[sampling_index];
1358 15230 ics->num_swb = ff_aac_num_swb_512[sampling_index];
1359 15230 ics->tns_max_bands = ff_tns_max_bands_512[sampling_index];
1360 }
1361
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) {
1362 ✗ ret_fail = AVERROR_BUG;
1363 ✗ goto fail;
1364 }
1365 } else {
1366
2/2
✓ Branch 0 taken 386 times.
✓ Branch 1 taken 42866 times.
 43252 if (m4ac->frame_length_short) {
1367 386 ics->num_swb = ff_aac_num_swb_960[sampling_index];
1368 386 ics->swb_offset = ff_swb_offset_960[sampling_index];
1369 } else {
1370 42866 ics->num_swb = ff_aac_num_swb_1024[sampling_index];
1371 42866 ics->swb_offset = ff_swb_offset_1024[sampling_index];
1372 }
1373 43252 ics->tns_max_bands = ff_tns_max_bands_1024[sampling_index];
1374 }
1375
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✓ Branch 1 taken 16365 times.
 62041 if (aot != AOT_ER_AAC_ELD) {
1376 45676 ics->predictor_present = get_bits1(gb);
1377 45676 ics->predictor_reset_group = 0;
1378 }
1379
2/2
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✓ Branch 1 taken 60077 times.
 62041 if (ics->predictor_present) {
1380
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✓ Branch 1 taken 538 times.
 1964 if (aot == AOT_AAC_MAIN) {
1381
1/2
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✓ Branch 2 taken 1426 times.
 1426 if (decode_prediction(ac, ics, gb)) {
1382 ✗ goto fail;
1383 }
1384
2/4
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✓ Branch 3 taken 538 times.
 538 } else if (aot == AOT_AAC_LC ||
1385 aot == AOT_ER_AAC_LC) {
1386 ✗ av_log(ac->avctx, AV_LOG_ERROR,
1387 "Prediction is not allowed in AAC-LC.\n");
1388 ✗ goto fail;
1389 } else {
1390
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 538 times.
 538 if (aot == AOT_ER_AAC_LD) {
1391 ✗ av_log(ac->avctx, AV_LOG_ERROR,
1392 "LTP in ER AAC LD not yet implemented.\n");
1393 ✗ ret_fail = AVERROR_PATCHWELCOME;
1394 ✗ goto fail;
1395 }
1396
2/2
✓ Branch 1 taken 382 times.
✓ Branch 2 taken 156 times.
 538 if ((ics->ltp.present = get_bits(gb, 1)))
1397 382 decode_ltp(ac, &ics->ltp, gb, ics->max_sfb);
1398 }
1399 }
1400 }
1401
1402
1/2
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✓ Branch 1 taken 63372 times.
 63372 if (ics->max_sfb > ics->num_swb) {
1403 ✗ av_log(ac->avctx, AV_LOG_ERROR,
1404 "Number of scalefactor bands in group (%d) "
1405 "exceeds limit (%d).\n",
1406 ✗ ics->max_sfb, ics->num_swb);
1407 ✗ goto fail;
1408 }
1409
1410 63372 return 0;
1411 ✗ fail:
1412 ✗ ics->max_sfb = 0;
1413 ✗ return ret_fail;
1414 }
1415
1416 /**
1417 * Decode band types (section_data payload); reference: table 4.46.
1418 *
1419 * @param band_type array of the used band type
1420 * @param band_type_run_end array of the last scalefactor band of a band type run
1421 *
1422 * @return Returns error status. 0 - OK, !0 - error
1423 */
1424 93936 static int decode_band_types(AACDecContext *ac, SingleChannelElement *sce,
1425 GetBitContext *gb)
1426 {
1427 93936 IndividualChannelStream *ics = &sce->ics;
1428
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;
1429
1430
2/2
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 193110 for (int g = 0; g < ics->num_window_groups; g++) {
1431 99174 int k = 0;
1432
2/2
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 563829 while (k < ics->max_sfb) {
1433 464655 uint8_t sect_end = k;
1434 int sect_len_incr;
1435 464655 int sect_band_type = get_bits(gb, 4);
1436
1/2
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 464655 if (sect_band_type == 12) {
1437 ✗ av_log(ac->avctx, AV_LOG_ERROR, "invalid band type\n");
1438 ✗ return AVERROR_INVALIDDATA;
1439 }
1440 do {
1441 483418 sect_len_incr = get_bits(gb, bits);
1442 483418 sect_end += sect_len_incr;
1443
1/2
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✓ Branch 2 taken 483418 times.
 483418 if (get_bits_left(gb) < 0) {
1444 ✗ av_log(ac->avctx, AV_LOG_ERROR, "decode_band_types: "overread_err);
1445 ✗ return AVERROR_INVALIDDATA;
1446 }
1447
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 483418 times.
 483418 if (sect_end > ics->max_sfb) {
1448 ✗ av_log(ac->avctx, AV_LOG_ERROR,
1449 "Number of bands (%d) exceeds limit (%d).\n",
1450 ✗ sect_end, ics->max_sfb);
1451 ✗ return AVERROR_INVALIDDATA;
1452 }
1453
2/2
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✓ Branch 1 taken 464655 times.
 483418 } while (sect_len_incr == (1 << bits) - 1);
1454
2/2
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✓ Branch 1 taken 464655 times.
 3943311 for (; k < sect_end; k++)
1455 3478656 sce->band_type[g*ics->max_sfb + k] = sect_band_type;
1456 }
1457 }
1458 93936 return 0;
1459 }
1460
1461 /**
1462 * Decode scalefactors; reference: table 4.47.
1463 *
1464 * @param global_gain first scalefactor value as scalefactors are differentially coded
1465 * @param band_type array of the used band type
1466 * @param band_type_run_end array of the last scalefactor band of a band type run
1467 * @param sf array of scalefactors or intensity stereo positions
1468 *
1469 * @return Returns error status. 0 - OK, !0 - error
1470 */
1471 93936 static int decode_scalefactors(AACDecContext *ac, SingleChannelElement *sce,
1472 GetBitContext *gb, unsigned int global_gain)
1473 {
1474 93936 IndividualChannelStream *ics = &sce->ics;
1475 93936 int offset[3] = { global_gain, global_gain - NOISE_OFFSET, 0 };
1476 int clipped_offset;
1477 93936 int noise_flag = 1;
1478
1479
2/2
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 193110 for (int g = 0; g < ics->num_window_groups; g++) {
1480
2/2
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✓ Branch 1 taken 99174 times.
 3577830 for (int sfb = 0; sfb < ics->max_sfb; sfb++) {
1481
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]) {
1482 537005 case ZERO_BT:
1483 537005 sce->sfo[g*ics->max_sfb + sfb] = 0;
1484 537005 break;
1485 66207 case INTENSITY_BT: /* fallthrough */
1486 case INTENSITY_BT2:
1487 66207 offset[2] += get_vlc2(gb, ff_vlc_scalefactors, 7, 3) - SCALE_DIFF_ZERO;
1488 66207 clipped_offset = av_clip(offset[2], -155, 100);
1489
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 66207 if (offset[2] != clipped_offset) {
1490 ✗ avpriv_request_sample(ac->avctx,
1491 "If you heard an audible artifact, there may be a bug in the decoder. "
1492 "Clipped intensity stereo position (%d -> %d)",
1493 offset[2], clipped_offset);
1494 }
1495 66207 sce->sfo[g*ics->max_sfb + sfb] = clipped_offset - 100;
1496 66207 break;
1497 281615 case NOISE_BT:
1498
2/2
✓ Branch 0 taken 6715 times.
✓ Branch 1 taken 274900 times.
 281615 if (noise_flag-- > 0)
1499 6715 offset[1] += get_bits(gb, NOISE_PRE_BITS) - NOISE_PRE;
1500 else
1501 274900 offset[1] += get_vlc2(gb, ff_vlc_scalefactors, 7, 3) - SCALE_DIFF_ZERO;
1502 281615 clipped_offset = av_clip(offset[1], -100, 155);
1503
1/2
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✓ Branch 1 taken 281615 times.
 281615 if (offset[1] != clipped_offset) {
1504 ✗ avpriv_request_sample(ac->avctx,
1505 "If you heard an audible artifact, there may be a bug in the decoder. "
1506 "Clipped noise gain (%d -> %d)",
1507 offset[1], clipped_offset);
1508 }
1509 281615 sce->sfo[g*ics->max_sfb + sfb] = clipped_offset;
1510 281615 break;
1511 2593829 default:
1512 2593829 offset[0] += get_vlc2(gb, ff_vlc_scalefactors, 7, 3) - SCALE_DIFF_ZERO;
1513
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 2593829 times.
 2593829 if (offset[0] > 255U) {
1514 ✗ av_log(ac->avctx, AV_LOG_ERROR,
1515 "Scalefactor (%d) out of range.\n", offset[0]);
1516 ✗ return AVERROR_INVALIDDATA;
1517 }
1518 2593829 sce->sfo[g*ics->max_sfb + sfb] = offset[0] - 100;
1519 2593829 break;
1520 }
1521 }
1522 }
1523
1524 93936 return 0;
1525 }
1526
1527 /**
1528 * Decode pulse data; reference: table 4.7.
1529 */
1530 1098 static int decode_pulses(Pulse *pulse, GetBitContext *gb,
1531 const uint16_t *swb_offset, int num_swb)
1532 {
1533 int i, pulse_swb;
1534 1098 pulse->num_pulse = get_bits(gb, 2) + 1;
1535 1098 pulse_swb = get_bits(gb, 6);
1536
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✓ Branch 1 taken 1098 times.
 1098 if (pulse_swb >= num_swb)
1537 ✗ return -1;
1538 1098 pulse->pos[0] = swb_offset[pulse_swb];
1539 1098 pulse->pos[0] += get_bits(gb, 5);
1540
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✓ Branch 1 taken 1098 times.
 1098 if (pulse->pos[0] >= swb_offset[num_swb])
1541 ✗ return -1;
1542 1098 pulse->amp[0] = get_bits(gb, 4);
1543
2/2
✓ Branch 0 taken 1646 times.
✓ Branch 1 taken 1098 times.
 2744 for (i = 1; i < pulse->num_pulse; i++) {
1544 1646 pulse->pos[i] = get_bits(gb, 5) + pulse->pos[i - 1];
1545
1/2
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✓ Branch 1 taken 1646 times.
 1646 if (pulse->pos[i] >= swb_offset[num_swb])
1546 ✗ return -1;
1547 1646 pulse->amp[i] = get_bits(gb, 4);
1548 }
1549 1098 return 0;
1550 }
1551
1552 /**
1553 * Decode Temporal Noise Shaping data; reference: table 4.48.
1554 *
1555 * @return Returns error status. 0 - OK, !0 - error
1556 */
1557 6955 int ff_aac_decode_tns(AACDecContext *ac, TemporalNoiseShaping *tns,
1558 GetBitContext *gb, const IndividualChannelStream *ics)
1559 {
1560 6955 int tns_max_order = INT32_MAX;
1561 6955 const int is_usac = ac->oc[1].m4ac.object_type == AOT_USAC;
1562 int w, filt, i, coef_len, coef_res, coef_compress;
1563 6955 const int is8 = ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE;
1564
1565 /* USAC doesn't seem to have a limit */
1566
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✗ Branch 1 not taken.
 6955 if (!is_usac)
1567
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;
1568
1569
2/2
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✓ Branch 1 taken 6955 times.
 18523 for (w = 0; w < ics->num_windows; w++) {
1570
2/2
✓ Branch 1 taken 7946 times.
✓ Branch 2 taken 3622 times.
 11568 if ((tns->n_filt[w] = get_bits(gb, 2 - is8))) {
1571 7946 coef_res = get_bits1(gb);
1572
1573
2/2
✓ Branch 0 taken 9407 times.
✓ Branch 1 taken 7946 times.
 17353 for (filt = 0; filt < tns->n_filt[w]; filt++) {
1574 int tmp2_idx;
1575 9407 tns->length[w][filt] = get_bits(gb, 6 - 2 * is8);
1576
1577
1/2
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✓ Branch 1 taken 9407 times.
 9407 if (is_usac)
1578 ✗ tns->order[w][filt] = get_bits(gb, 4 - is8);
1579 else
1580 9407 tns->order[w][filt] = get_bits(gb, 5 - (2 * is8));
1581
1582
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 9407 times.
 9407 if (tns->order[w][filt] > tns_max_order) {
1583 ✗ av_log(ac->avctx, AV_LOG_ERROR,
1584 "TNS filter order %d is greater than maximum %d.\n",
1585 tns->order[w][filt], tns_max_order);
1586 ✗ tns->order[w][filt] = 0;
1587 ✗ return AVERROR_INVALIDDATA;
1588 }
1589
2/2
✓ Branch 0 taken 8887 times.
✓ Branch 1 taken 520 times.
 9407 if (tns->order[w][filt]) {
1590 8887 tns->direction[w][filt] = get_bits1(gb);
1591 8887 coef_compress = get_bits1(gb);
1592 8887 coef_len = coef_res + 3 - coef_compress;
1593 8887 tmp2_idx = 2 * coef_compress + coef_res;
1594
1595
2/2
✓ Branch 0 taken 58548 times.
✓ Branch 1 taken 8887 times.
 67435 for (i = 0; i < tns->order[w][filt]; i++) {
1596
2/2
✓ Branch 0 taken 14113 times.
✓ Branch 1 taken 44435 times.
 58548 if (CONFIG_AAC_FIXED_DECODER && ac->is_fixed)
1597 14113 tns->coef_fixed[w][filt][i] = Q31(ff_tns_tmp2_map[tmp2_idx][get_bits(gb, coef_len)]);
1598 else if (CONFIG_AAC_DECODER)
1599 44435 tns->coef[w][filt][i] = ff_tns_tmp2_map[tmp2_idx][get_bits(gb, coef_len)];
1600 }
1601 }
1602 }
1603 }
1604 }
1605 6955 return 0;
1606 }
1607
1608 /**
1609 * Decode Mid/Side data; reference: table 4.54.
1610 *
1611 * @param ms_present Indicates mid/side stereo presence. [0] mask is all 0s;
1612 * [1] mask is decoded from bitstream; [2] mask is all 1s;
1613 * [3] reserved for scalable AAC
1614 */
1615 27052 static void decode_mid_side_stereo(ChannelElement *cpe, GetBitContext *gb,
1616 int ms_present)
1617 {
1618 int idx;
1619 27052 int max_idx = cpe->ch[0].ics.num_window_groups * cpe->ch[0].ics.max_sfb;
1620 27052 cpe->max_sfb_ste = cpe->ch[0].ics.max_sfb;
1621
2/2
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✓ Branch 1 taken 14365 times.
 27052 if (ms_present == 1) {
1622
2/2
✓ Branch 0 taken 497864 times.
✓ Branch 1 taken 12687 times.
 510551 for (idx = 0; idx < max_idx; idx++)
1623 497864 cpe->ms_mask[idx] = get_bits1(gb);
1624
1/2
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✗ Branch 1 not taken.
 14365 } else if (ms_present == 2) {
1625 14365 memset(cpe->ms_mask, 1, max_idx * sizeof(cpe->ms_mask[0]));
1626 }
1627 27052 }
1628
1629 ✗ static void decode_gain_control(SingleChannelElement * sce, GetBitContext * gb)
1630 {
1631 // wd_num, wd_test, aloc_size
1632 static const uint8_t gain_mode[4][3] = {
1633 {1, 0, 5}, // ONLY_LONG_SEQUENCE = 0,
1634 {2, 1, 2}, // LONG_START_SEQUENCE,
1635 {8, 0, 2}, // EIGHT_SHORT_SEQUENCE,
1636 {2, 1, 5}, // LONG_STOP_SEQUENCE
1637 };
1638
1639 ✗ const int mode = sce->ics.window_sequence[0];
1640 uint8_t bd, wd, ad;
1641
1642 // FIXME: Store the gain control data on |sce| and do something with it.
1643 ✗ uint8_t max_band = get_bits(gb, 2);
1644 ✗ for (bd = 0; bd < max_band; bd++) {
1645 ✗ for (wd = 0; wd < gain_mode[mode][0]; wd++) {
1646 ✗ uint8_t adjust_num = get_bits(gb, 3);
1647 ✗ for (ad = 0; ad < adjust_num; ad++) {
1648 ✗ skip_bits(gb, 4 + ((wd == 0 && gain_mode[mode][1])
1649 ? 4
1650 ✗ : gain_mode[mode][2]));
1651 }
1652 }
1653 }
1654 ✗ }
1655
1656 /**
1657 * Decode an individual_channel_stream payload; reference: table 4.44.
1658 *
1659 * @param common_window Channels have independent [0], or shared [1], Individual Channel Stream information.
1660 * @param scale_flag scalable [1] or non-scalable [0] AAC (Unused until scalable AAC is implemented.)
1661 *
1662 * @return Returns error status. 0 - OK, !0 - error
1663 */
1664 93936 int ff_aac_decode_ics(AACDecContext *ac, SingleChannelElement *sce,
1665 GetBitContext *gb, int common_window, int scale_flag)
1666 {
1667 Pulse pulse;
1668 93936 TemporalNoiseShaping *tns = &sce->tns;
1669 93936 IndividualChannelStream *ics = &sce->ics;
1670 93936 int global_gain, eld_syntax, er_syntax, pulse_present = 0;
1671 int ret;
1672
1673 93936 eld_syntax = ac->oc[1].m4ac.object_type == AOT_ER_AAC_ELD;
1674 281808 er_syntax = ac->oc[1].m4ac.object_type == AOT_ER_AAC_LC ||
1675
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✗ Branch 1 not taken.
 93936 ac->oc[1].m4ac.object_type == AOT_ER_AAC_LTP ||
1676
3/4
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✓ Branch 2 taken 90300 times.
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 278172 ac->oc[1].m4ac.object_type == AOT_ER_AAC_LD ||
1677
2/2
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✓ Branch 1 taken 63702 times.
 90300 ac->oc[1].m4ac.object_type == AOT_ER_AAC_ELD;
1678
1679 /* This assignment is to silence a GCC warning about the variable being used
1680 * uninitialized when in fact it always is.
1681 */
1682 93936 pulse.num_pulse = 0;
1683
1684 93936 global_gain = get_bits(gb, 8);
1685
1686
3/4
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 93936 if (!common_window && !scale_flag) {
1687 32808 ret = decode_ics_info(ac, ics, gb);
1688
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 32808 if (ret < 0)
1689 ✗ goto fail;
1690 }
1691
1692
1/2
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 93936 if ((ret = decode_band_types(ac, sce, gb)) < 0)
1693 ✗ goto fail;
1694
1/2
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✓ Branch 2 taken 93936 times.
 93936 if ((ret = decode_scalefactors(ac, sce, gb, global_gain)) < 0)
1695 ✗ goto fail;
1696
1697 93936 ac->dsp.dequant_scalefactors(sce);
1698
1699 93936 pulse_present = 0;
1700
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 93936 if (!scale_flag) {
1701
4/4
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✓ Branch 4 taken 66240 times.
 93936 if (!eld_syntax && (pulse_present = get_bits1(gb))) {
1702
1/2
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✓ Branch 1 taken 1098 times.
 1098 if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
1703 ✗ av_log(ac->avctx, AV_LOG_ERROR,
1704 "Pulse tool not allowed in eight short sequence.\n");
1705 ✗ ret = AVERROR_INVALIDDATA;
1706 ✗ goto fail;
1707 }
1708
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✗ Branch 1 not taken.
✓ Branch 2 taken 1098 times.
 1098 if (decode_pulses(&pulse, gb, ics->swb_offset, ics->num_swb)) {
1709 ✗ av_log(ac->avctx, AV_LOG_ERROR,
1710 "Pulse data corrupt or invalid.\n");
1711 ✗ ret = AVERROR_INVALIDDATA;
1712 ✗ goto fail;
1713 }
1714 }
1715 93936 tns->present = get_bits1(gb);
1716
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) {
1717 5691 ret = ff_aac_decode_tns(ac, tns, gb, ics);
1718
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 5691 times.
 5691 if (ret < 0)
1719 ✗ goto fail;
1720 }
1721
3/4
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✗ Branch 3 not taken.
✓ Branch 4 taken 67338 times.
 93936 if (!eld_syntax && get_bits1(gb)) {
1722 ✗ decode_gain_control(sce, gb);
1723 ✗ if (!ac->warned_gain_control) {
1724 ✗ avpriv_report_missing_feature(ac->avctx, "Gain control");
1725 ✗ ac->warned_gain_control = 1;
1726 }
1727 }
1728 // I see no textual basis in the spec for this occurring after SSR gain
1729 // control, but this is what both reference and real implmentations do
1730
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) {
1731 1264 ret = ff_aac_decode_tns(ac, tns, gb, ics);
1732
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1264 times.
 1264 if (ret < 0)
1733 ✗ goto fail;
1734 }
1735 }
1736
1737
2/2
✓ Branch 0 taken 1098 times.
✓ Branch 1 taken 92838 times.
 93936 ret = ac->proc.decode_spectrum_and_dequant(ac, gb,
1738 pulse_present ? &pulse : NULL,
1739 sce);
1740
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 93936 times.
 93936 if (ret < 0)
1741 ✗ goto fail;
1742
1743
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)
1744 6094 ac->dsp.apply_prediction(ac, sce);
1745
1746 93936 return 0;
1747 ✗ fail:
1748 ✗ tns->present = 0;
1749 ✗ return ret;
1750 }
1751
1752 /**
1753 * Decode a channel_pair_element; reference: table 4.4.
1754 *
1755 * @return Returns error status. 0 - OK, !0 - error
1756 */
1757 30786 static int decode_cpe(AACDecContext *ac, GetBitContext *gb, ChannelElement *cpe)
1758 {
1759 30786 int i, ret, common_window, ms_present = 0;
1760 30786 int eld_syntax = ac->oc[1].m4ac.object_type == AOT_ER_AAC_ELD;
1761
1762
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);
1763
2/2
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✓ Branch 1 taken 222 times.
 30786 if (common_window) {
1764
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 30564 times.
 30564 if (decode_ics_info(ac, &cpe->ch[0].ics, gb))
1765 ✗ return AVERROR_INVALIDDATA;
1766 30564 i = cpe->ch[1].ics.use_kb_window[0];
1767 30564 cpe->ch[1].ics = cpe->ch[0].ics;
1768 30564 cpe->ch[1].ics.use_kb_window[1] = i;
1769
2/2
✓ Branch 0 taken 723 times.
✓ Branch 1 taken 29841 times.
 30564 if (cpe->ch[1].ics.predictor_present &&
1770
2/2
✓ Branch 0 taken 538 times.
✓ Branch 1 taken 185 times.
 723 (ac->oc[1].m4ac.object_type != AOT_AAC_MAIN))
1771
2/2
✓ Branch 1 taken 404 times.
✓ Branch 2 taken 134 times.
 538 if ((cpe->ch[1].ics.ltp.present = get_bits(gb, 1)))
1772 404 decode_ltp(ac, &cpe->ch[1].ics.ltp, gb, cpe->ch[1].ics.max_sfb);
1773 30564 ms_present = get_bits(gb, 2);
1774
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 30564 times.
 30564 if (ms_present == 3) {
1775 ✗ av_log(ac->avctx, AV_LOG_ERROR, "ms_present = 3 is reserved.\n");
1776 ✗ return AVERROR_INVALIDDATA;
1777
2/2
✓ Branch 0 taken 27052 times.
✓ Branch 1 taken 3512 times.
 30564 } else if (ms_present)
1778 27052 decode_mid_side_stereo(cpe, gb, ms_present);
1779 }
1780
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)))
1781 ✗ return ret;
1782
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)))
1783 ✗ return ret;
1784
1785
2/2
✓ Branch 0 taken 30564 times.
✓ Branch 1 taken 222 times.
 30786 if (common_window) {
1786
2/2
✓ Branch 0 taken 27052 times.
✓ Branch 1 taken 3512 times.
 30564 if (ms_present)
1787 27052 ac->dsp.apply_mid_side_stereo(ac, cpe);
1788
2/2
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✓ Branch 1 taken 29917 times.
 30564 if (ac->oc[1].m4ac.object_type == AOT_AAC_MAIN) {
1789 647 ac->dsp.apply_prediction(ac, &cpe->ch[0]);
1790 647 ac->dsp.apply_prediction(ac, &cpe->ch[1]);
1791 }
1792 }
1793
1794 30786 ac->dsp.apply_intensity_stereo(ac, cpe, ms_present);
1795 30786 return 0;
1796 }
1797
1798 /**
1799 * Parse whether channels are to be excluded from Dynamic Range Compression; reference: table 4.53.
1800 *
1801 * @return Returns number of bytes consumed.
1802 */
1803 4 static int decode_drc_channel_exclusions(DynamicRangeControl *che_drc,
1804 GetBitContext *gb)
1805 {
1806 int i;
1807 4 int num_excl_chan = 0;
1808
1809 do {
1810
2/2
✓ Branch 0 taken 28 times.
✓ Branch 1 taken 4 times.
 32 for (i = 0; i < 7; i++)
1811 28 che_drc->exclude_mask[num_excl_chan++] = get_bits1(gb);
1812
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));
1813
1814 4 return num_excl_chan / 7;
1815 }
1816
1817 /**
1818 * Decode dynamic range information; reference: table 4.52.
1819 *
1820 * @return Returns number of bytes consumed.
1821 */
1822 880 static int decode_dynamic_range(DynamicRangeControl *che_drc,
1823 GetBitContext *gb)
1824 {
1825 880 int n = 1;
1826 880 int drc_num_bands = 1;
1827 int i;
1828
1829 /* pce_tag_present? */
1830
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 880 times.
 880 if (get_bits1(gb)) {
1831 ✗ che_drc->pce_instance_tag = get_bits(gb, 4);
1832 ✗ skip_bits(gb, 4); // tag_reserved_bits
1833 ✗ n++;
1834 }
1835
1836 /* excluded_chns_present? */
1837
2/2
✓ Branch 1 taken 4 times.
✓ Branch 2 taken 876 times.
 880 if (get_bits1(gb)) {
1838 4 n += decode_drc_channel_exclusions(che_drc, gb);
1839 }
1840
1841 /* drc_bands_present? */
1842
2/2
✓ Branch 1 taken 35 times.
✓ Branch 2 taken 845 times.
 880 if (get_bits1(gb)) {
1843 35 che_drc->band_incr = get_bits(gb, 4);
1844 35 che_drc->interpolation_scheme = get_bits(gb, 4);
1845 35 n++;
1846 35 drc_num_bands += che_drc->band_incr;
1847
2/2
✓ Branch 0 taken 105 times.
✓ Branch 1 taken 35 times.
 140 for (i = 0; i < drc_num_bands; i++) {
1848 105 che_drc->band_top[i] = get_bits(gb, 8);
1849 105 n++;
1850 }
1851 }
1852
1853 /* prog_ref_level_present? */
1854
2/2
✓ Branch 1 taken 878 times.
✓ Branch 2 taken 2 times.
 880 if (get_bits1(gb)) {
1855 878 che_drc->prog_ref_level = get_bits(gb, 7);
1856 878 skip_bits1(gb); // prog_ref_level_reserved_bits
1857 878 n++;
1858 }
1859
1860
2/2
✓ Branch 0 taken 950 times.
✓ Branch 1 taken 880 times.
 1830 for (i = 0; i < drc_num_bands; i++) {
1861 950 che_drc->dyn_rng_sgn[i] = get_bits1(gb);
1862 950 che_drc->dyn_rng_ctl[i] = get_bits(gb, 7);
1863 950 n++;
1864 }
1865
1866 880 return n;
1867 }
1868
1869 8953 static int decode_fill(AACDecContext *ac, GetBitContext *gb, int len) {
1870 uint8_t buf[256];
1871 int i, major, minor;
1872
1873
2/2
✓ Branch 0 taken 380 times.
✓ Branch 1 taken 8573 times.
 8953 if (len < 13+7*8)
1874 380 goto unknown;
1875
1876 8573 get_bits(gb, 13); len -= 13;
1877
1878
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)
1879 1128721 buf[i] = get_bits(gb, 8);
1880
1881 8573 buf[i] = 0;
1882
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 8573 times.
 8573 if (ac->avctx->debug & FF_DEBUG_PICT_INFO)
1883 ✗ av_log(ac->avctx, AV_LOG_DEBUG, "FILL:%s\n", buf);
1884
1885
2/2
✓ Branch 0 taken 8554 times.
✓ Branch 1 taken 19 times.
 8573 if (sscanf(buf, "libfaac %d.%d", &major, &minor) == 2){
1886 19 ac->avctx->internal->skip_samples = 1024;
1887 }
1888
1889 8554 unknown:
1890 8953 skip_bits_long(gb, len);
1891
1892 8953 return 0;
1893 }
1894
1895 /**
1896 * Decode extension data (incomplete); reference: table 4.51.
1897 *
1898 * @param cnt length of TYPE_FIL syntactic element in bytes
1899 *
1900 * @return Returns number of bytes consumed
1901 */
1902 23684 static int decode_extension_payload(AACDecContext *ac, GetBitContext *gb, int cnt,
1903 ChannelElement *che, enum RawDataBlockType elem_type)
1904 {
1905 23684 int crc_flag = 0;
1906 23684 int res = cnt;
1907 23684 int type = get_bits(gb, 4);
1908
1909
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 23684 times.
 23684 if (ac->avctx->debug & FF_DEBUG_STARTCODE)
1910 ✗ av_log(ac->avctx, AV_LOG_DEBUG, "extension type: %d len:%d\n", type, cnt);
1911
1912
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
1913 ✗ case EXT_SBR_DATA_CRC:
1914 ✗ crc_flag++;
1915 10901 case EXT_SBR_DATA:
1916
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 10901 times.
 10901 if (!che) {
1917 ✗ av_log(ac->avctx, AV_LOG_ERROR, "SBR was found before the first channel element.\n");
1918 ✗ return res;
1919
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 10901 times.
 10901 } else if (ac->oc[1].m4ac.frame_length_short) {
1920 ✗ if (!ac->warned_960_sbr)
1921 ✗ avpriv_report_missing_feature(ac->avctx,
1922 "SBR with 960 frame length");
1923 ✗ ac->warned_960_sbr = 1;
1924 ✗ skip_bits_long(gb, 8 * cnt - 4);
1925 ✗ return res;
1926
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 10901 times.
 10901 } else if (!ac->oc[1].m4ac.sbr) {
1927 ✗ av_log(ac->avctx, AV_LOG_ERROR, "SBR signaled to be not-present but was found in the bitstream.\n");
1928 ✗ skip_bits_long(gb, 8 * cnt - 4);
1929 ✗ return res;
1930
3/4
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✓ 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) {
1931 ✗ av_log(ac->avctx, AV_LOG_ERROR, "Implicit SBR was found with a first occurrence after the first frame.\n");
1932 ✗ skip_bits_long(gb, 8 * cnt - 4);
1933 ✗ return res;
1934
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 &&
1935
2/2
✓ Branch 0 taken 12 times.
✓ Branch 1 taken 82 times.
 94 ac->avctx->ch_layout.nb_channels == 1) {
1936 12 ac->oc[1].m4ac.sbr = 1;
1937 12 ac->oc[1].m4ac.ps = 1;
1938 12 ac->avctx->profile = AV_PROFILE_AAC_HE_V2;
1939 12 ff_aac_output_configure(ac, ac->oc[1].layout_map, ac->oc[1].layout_map_tags,
1940 ac->oc[1].status, 1);
1941 } else {
1942 10889 ac->oc[1].m4ac.sbr = 1;
1943 10889 ac->avctx->profile = AV_PROFILE_AAC_HE;
1944 }
1945
1946 10901 ac->proc.sbr_decode_extension(ac, che, gb, crc_flag, cnt, elem_type);
1947
1948
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) {
1949 22 av_log(ac->avctx, AV_LOG_VERBOSE, "Treating HE-AAC mono as stereo.\n");
1950 22 ac->warned_he_aac_mono = 1;
1951 }
1952 10901 break;
1953 880 case EXT_DYNAMIC_RANGE:
1954 880 res = decode_dynamic_range(&ac->che_drc, gb);
1955 880 break;
1956 8953 case EXT_FILL:
1957 8953 decode_fill(ac, gb, 8 * cnt - 4);
1958 8953 break;
1959 2950 case EXT_FILL_DATA:
1960 case EXT_DATA_ELEMENT:
1961 default:
1962 2950 skip_bits_long(gb, 8 * cnt - 4);
1963 2950 break;
1964 };
1965 23684 return res;
1966 }
1967
1968 /**
1969 * channel coupling transformation interface
1970 *
1971 * @param apply_coupling_method pointer to (in)dependent coupling function
1972 */
1973 176590 static void apply_channel_coupling(AACDecContext *ac, ChannelElement *cc,
1974 enum RawDataBlockType type, int elem_id,
1975 enum CouplingPoint coupling_point,
1976 void (*apply_coupling_method)(AACDecContext *ac, SingleChannelElement *target, ChannelElement *cce, int index))
1977 {
1978 int i, c;
1979
1980
2/2
✓ Branch 0 taken 11301760 times.
✓ Branch 1 taken 176590 times.
 11478350 for (i = 0; i < MAX_ELEM_ID; i++) {
1981 11301760 ChannelElement *cce = ac->che[TYPE_CCE][i];
1982 11301760 int index = 0;
1983
1984
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) {
1985 3915 ChannelCoupling *coup = &cce->coup;
1986
1987
2/2
✓ Branch 0 taken 9402 times.
✓ Branch 1 taken 3915 times.
 13317 for (c = 0; c <= coup->num_coupled; c++) {
1988
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) {
1989
2/2
✓ Branch 0 taken 2561 times.
✓ Branch 1 taken 180 times.
 2741 if (coup->ch_select[c] != 1) {
1990 2561 apply_coupling_method(ac, &cc->ch[0], cce, index);
1991
1/2
✓ Branch 0 taken 2561 times.
✗ Branch 1 not taken.
 2561 if (coup->ch_select[c] != 0)
1992 2561 index++;
1993 }
1994
2/2
✓ Branch 0 taken 2147 times.
✓ Branch 1 taken 594 times.
 2741 if (coup->ch_select[c] != 2)
1995 2147 apply_coupling_method(ac, &cc->ch[1], cce, index++);
1996 } else
1997
2/2
✓ Branch 0 taken 4720 times.
✓ Branch 1 taken 1941 times.
 6661 index += 1 + (coup->ch_select[c] == 3);
1998 }
1999 }
2000 }
2001 176590 }
2002
2003 /**
2004 * Convert spectral data to samples, applying all supported tools as appropriate.
2005 */
2006 50104 static void spectral_to_sample(AACDecContext *ac, int samples)
2007 {
2008 int i, type;
2009 void (*imdct_and_window)(AACDecContext *ac, SingleChannelElement *sce);
2010
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) {
2011 606 case AOT_ER_AAC_LD:
2012 606 imdct_and_window = ac->dsp.imdct_and_windowing_ld;
2013 606 break;
2014 16365 case AOT_ER_AAC_ELD:
2015 16365 imdct_and_window = ac->dsp.imdct_and_windowing_eld;
2016 16365 break;
2017 33133 default:
2018
2/2
✓ Branch 0 taken 387 times.
✓ Branch 1 taken 32746 times.
 33133 if (ac->oc[1].m4ac.frame_length_short)
2019 387 imdct_and_window = ac->dsp.imdct_and_windowing_960;
2020 else
2021 32746 imdct_and_window = ac->dsp.imdct_and_windowing;
2022 }
2023
2/2
✓ Branch 0 taken 200416 times.
✓ Branch 1 taken 50104 times.
 250520 for (type = 3; type >= 0; type--) {
2024
2/2
✓ Branch 0 taken 12826624 times.
✓ Branch 1 taken 200416 times.
 13027040 for (i = 0; i < MAX_ELEM_ID; i++) {
2025 12826624 ChannelElement *che = ac->che[type][i];
2026
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) {
2027
2/2
✓ Branch 0 taken 58472 times.
✓ Branch 1 taken 4678 times.
 63150 if (type <= TYPE_CPE)
2028 58472 apply_channel_coupling(ac, che, type, i, BEFORE_TNS, ac->dsp.apply_dependent_coupling);
2029
2/2
✓ Branch 0 taken 1784 times.
✓ Branch 1 taken 61366 times.
 63150 if (ac->oc[1].m4ac.object_type == AOT_AAC_LTP) {
2030
2/2
✓ Branch 0 taken 538 times.
✓ Branch 1 taken 1246 times.
 1784 if (che->ch[0].ics.predictor_present) {
2031
2/2
✓ Branch 0 taken 382 times.
✓ Branch 1 taken 156 times.
 538 if (che->ch[0].ics.ltp.present)
2032 382 ac->dsp.apply_ltp(ac, &che->ch[0]);
2033
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)
2034 404 ac->dsp.apply_ltp(ac, &che->ch[1]);
2035 }
2036 }
2037
2/2
✓ Branch 0 taken 4647 times.
✓ Branch 1 taken 58503 times.
 63150 if (che->ch[0].tns.present)
2038 4647 ac->dsp.apply_tns(che->ch[0].coeffs,
2039 &che->ch[0].tns, &che->ch[0].ics, 1);
2040
2/2
✓ Branch 0 taken 2308 times.
✓ Branch 1 taken 60842 times.
 63150 if (che->ch[1].tns.present)
2041 2308 ac->dsp.apply_tns(che->ch[1].coeffs,
2042 &che->ch[1].tns, &che->ch[1].ics, 1);
2043
2/2
✓ Branch 0 taken 58472 times.
✓ Branch 1 taken 4678 times.
 63150 if (type <= TYPE_CPE)
2044 58472 apply_channel_coupling(ac, che, type, i, BETWEEN_TNS_AND_IMDCT, ac->dsp.apply_dependent_coupling);
2045
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) {
2046 62369 imdct_and_window(ac, &che->ch[0]);
2047
2/2
✓ Branch 0 taken 1784 times.
✓ Branch 1 taken 60585 times.
 62369 if (ac->oc[1].m4ac.object_type == AOT_AAC_LTP)
2048 1784 ac->dsp.update_ltp(ac, &che->ch[0]);
2049
2/2
✓ Branch 0 taken 30786 times.
✓ Branch 1 taken 31583 times.
 62369 if (type == TYPE_CPE) {
2050 30786 imdct_and_window(ac, &che->ch[1]);
2051
2/2
✓ Branch 0 taken 1784 times.
✓ Branch 1 taken 29002 times.
 30786 if (ac->oc[1].m4ac.object_type == AOT_AAC_LTP)
2052 1784 ac->dsp.update_ltp(ac, &che->ch[1]);
2053 }
2054
2/2
✓ Branch 0 taken 12411 times.
✓ Branch 1 taken 49958 times.
 62369 if (ac->oc[1].m4ac.sbr > 0) {
2055 12411 ac->proc.sbr_apply(ac, che, type,
2056 12411 che->ch[0].output,
2057 12411 che->ch[1].output);
2058 }
2059 }
2060
2/2
✓ Branch 0 taken 59646 times.
✓ Branch 1 taken 3504 times.
 63150 if (type <= TYPE_CCE)
2061 59646 apply_channel_coupling(ac, che, type, i, AFTER_IMDCT, ac->dsp.apply_independent_coupling);
2062 63150 ac->dsp.clip_output(ac, che, type, samples);
2063 63150 che->present = 0;
2064
2/2
✓ Branch 0 taken 329 times.
✓ Branch 1 taken 12763145 times.
 12763474 } else if (che) {
2065 329 av_log(ac->avctx, AV_LOG_VERBOSE, "ChannelElement %d.%d missing \n", type, i);
2066 }
2067 }
2068 }
2069 50104 }
2070
2071 4114 static int parse_adts_frame_header(AACDecContext *ac, GetBitContext *gb)
2072 {
2073 int size;
2074 AACADTSHeaderInfo hdr_info;
2075 uint8_t layout_map[MAX_ELEM_ID*4][3];
2076 int layout_map_tags, ret;
2077
2078 4114 size = ff_adts_header_parse(gb, &hdr_info);
2079
1/2
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✗ Branch 1 not taken.
 4114 if (size > 0) {
2080
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 4114 if (!ac->warned_num_aac_frames && hdr_info.num_aac_frames != 1) {
2081 // This is 2 for "VLB " audio in NSV files.
2082 // See samples/nsv/vlb_audio.
2083 ✗ avpriv_report_missing_feature(ac->avctx,
2084 "More than one AAC RDB per ADTS frame");
2085 ✗ ac->warned_num_aac_frames = 1;
2086 }
2087 4114 push_output_configuration(ac);
2088
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 4114 if (hdr_info.chan_config) {
2089 4114 ac->oc[1].m4ac.chan_config = hdr_info.chan_config;
2090
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 4114 if ((ret = ff_aac_set_default_channel_config(ac, ac->avctx,
2091 layout_map,
2092 &layout_map_tags,
2093 4114 hdr_info.chan_config)) < 0)
2094 ✗ return ret;
2095
1/2
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✓ Branch 1 taken 4114 times.
 4114 if ((ret = ff_aac_output_configure(ac, layout_map, layout_map_tags,
2096 4114 FFMAX(ac->oc[1].status,
2097 OC_TRIAL_FRAME), 0)) < 0)
2098 ✗ return ret;
2099 } else {
2100 ✗ ac->oc[1].m4ac.chan_config = 0;
2101 /**
2102 * dual mono frames in Japanese DTV can have chan_config 0
2103 * WITHOUT specifying PCE.
2104 * thus, set dual mono as default.
2105 */
2106 ✗ if (ac->dmono_mode && ac->oc[0].status == OC_NONE) {
2107 ✗ layout_map_tags = 2;
2108 ✗ layout_map[0][0] = layout_map[1][0] = TYPE_SCE;
2109 ✗ layout_map[0][2] = layout_map[1][2] = AAC_CHANNEL_FRONT;
2110 ✗ layout_map[0][1] = 0;
2111 ✗ layout_map[1][1] = 1;
2112 ✗ if (ff_aac_output_configure(ac, layout_map, layout_map_tags,
2113 OC_TRIAL_FRAME, 0))
2114 ✗ return -7;
2115 }
2116 }
2117 4114 ac->oc[1].m4ac.sample_rate = hdr_info.sample_rate;
2118 4114 ac->oc[1].m4ac.sampling_index = hdr_info.sampling_index;
2119 4114 ac->oc[1].m4ac.object_type = hdr_info.object_type;
2120 4114 ac->oc[1].m4ac.frame_length_short = 0;
2121
2/2
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✓ Branch 1 taken 56 times.
 4114 if (ac->oc[0].status != OC_LOCKED ||
2122
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 4058 ac->oc[0].m4ac.chan_config != hdr_info.chan_config ||
2123
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 4058 ac->oc[0].m4ac.sample_rate != hdr_info.sample_rate) {
2124 56 ac->oc[1].m4ac.sbr = -1;
2125 56 ac->oc[1].m4ac.ps = -1;
2126 }
2127
2/2
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 4114 if (!hdr_info.crc_absent)
2128 1 skip_bits(gb, 16);
2129 }
2130 4114 return size;
2131 }
2132
2133 16971 static int aac_decode_er_frame(AVCodecContext *avctx, AVFrame *frame,
2134 int *got_frame_ptr, GetBitContext *gb)
2135 {
2136 16971 AACDecContext *ac = avctx->priv_data;
2137 16971 const MPEG4AudioConfig *const m4ac = &ac->oc[1].m4ac;
2138 ChannelElement *che;
2139 int err, i;
2140
2/2
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✓ Branch 1 taken 13412 times.
 16971 int samples = m4ac->frame_length_short ? 960 : 1024;
2141 16971 int chan_config = m4ac->chan_config;
2142 16971 int aot = m4ac->object_type;
2143
2144
3/4
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✗ Branch 3 not taken.
 16971 if (aot == AOT_ER_AAC_LD || aot == AOT_ER_AAC_ELD)
2145 16971 samples >>= 1;
2146
2147 16971 ac->frame = frame;
2148
2149
1/2
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 16971 if ((err = frame_configure_elements(avctx)) < 0)
2150 ✗ return err;
2151
2152 // The AV_PROFILE_AAC_* defines are all object_type - 1
2153 // This may lead to an undefined profile being signaled
2154 16971 ac->avctx->profile = aot - 1;
2155
2156 16971 ac->tags_mapped = 0;
2157
2158
3/8
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 16971 if (chan_config < 0 || (chan_config >= 8 && chan_config < 11) || chan_config >= 13) {
2159 ✗ avpriv_request_sample(avctx, "Unknown ER channel configuration %d",
2160 chan_config);
2161 ✗ return AVERROR_INVALIDDATA;
2162 }
2163
2/2
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✓ Branch 1 taken 16971 times.
 35760 for (i = 0; i < ff_tags_per_config[chan_config]; i++) {
2164 18789 const int elem_type = ff_aac_channel_layout_map[chan_config-1][i][0];
2165 18789 const int elem_id = ff_aac_channel_layout_map[chan_config-1][i][1];
2166
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 18789 times.
 18789 if (!(che=ff_aac_get_che(ac, elem_type, elem_id))) {
2167 ✗ av_log(ac->avctx, AV_LOG_ERROR,
2168 "channel element %d.%d is not allocated\n",
2169 elem_type, elem_id);
2170 ✗ return AVERROR_INVALIDDATA;
2171 }
2172 18789 che->present = 1;
2173
2/2
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 18789 if (aot != AOT_ER_AAC_ELD)
2174 2424 skip_bits(gb, 4);
2175
3/4
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✗ Branch 3 not taken.
 18789 switch (elem_type) {
2176 6738 case TYPE_SCE:
2177 6738 err = ff_aac_decode_ics(ac, &che->ch[0], gb, 0, 0);
2178 6738 break;
2179 11445 case TYPE_CPE:
2180 11445 err = decode_cpe(ac, gb, che);
2181 11445 break;
2182 606 case TYPE_LFE:
2183 606 err = ff_aac_decode_ics(ac, &che->ch[0], gb, 0, 0);
2184 606 break;
2185 }
2186
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✓ Branch 1 taken 18789 times.
 18789 if (err < 0)
2187 ✗ return err;
2188 }
2189
2190 16971 spectral_to_sample(ac, samples);
2191
2192
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 16971 if (!ac->frame->data[0] && samples) {
2193 ✗ av_log(avctx, AV_LOG_ERROR, "no frame data found\n");
2194 ✗ return AVERROR_INVALIDDATA;
2195 }
2196
2197 16971 ac->frame->nb_samples = samples;
2198 16971 ac->frame->sample_rate = avctx->sample_rate;
2199 16971 *got_frame_ptr = 1;
2200
2201 16971 skip_bits_long(gb, get_bits_left(gb));
2202 16971 return 0;
2203 }
2204
2205 33133 static int decode_frame_ga(AVCodecContext *avctx, AACDecContext *ac,
2206 GetBitContext *gb, int *got_frame_ptr)
2207 {
2208 int err;
2209 int is_dmono;
2210 int elem_id;
2211 33133 enum RawDataBlockType elem_type, che_prev_type = TYPE_END;
2212 33133 uint8_t che_presence[4][MAX_ELEM_ID] = {{0}};
2213 33133 ChannelElement *che = NULL, *che_prev = NULL;
2214 33133 int samples = 0, multiplier, audio_found = 0, pce_found = 0, sce_count = 0;
2215 33133 AVFrame *frame = ac->frame;
2216
2217 33133 int payload_alignment = get_bits_count(gb);
2218 // parse
2219
2/2
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✓ Branch 2 taken 33133 times.
 105538 while ((elem_type = get_bits(gb, 3)) != TYPE_END) {
2220 72405 elem_id = get_bits(gb, 4);
2221
2222
1/2
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✓ Branch 1 taken 72405 times.
 72405 if (avctx->debug & FF_DEBUG_STARTCODE)
2223 ✗ av_log(avctx, AV_LOG_DEBUG, "Elem type:%x id:%x\n", elem_type, elem_id);
2224
2225
1/4
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 72405 if (!avctx->ch_layout.nb_channels && elem_type != TYPE_PCE)
2226 ✗ return AVERROR_INVALIDDATA;
2227
2228
2/2
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✓ Branch 1 taken 28044 times.
 72405 if (elem_type < TYPE_DSE) {
2229
1/2
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 44361 if (che_presence[elem_type][elem_id]) {
2230 ✗ int error = che_presence[elem_type][elem_id] > 1;
2231 ✗ av_log(ac->avctx, error ? AV_LOG_ERROR : AV_LOG_DEBUG, "channel element %d.%d duplicate\n",
2232 elem_type, elem_id);
2233 ✗ if (error)
2234 ✗ return AVERROR_INVALIDDATA;
2235 }
2236 44361 che_presence[elem_type][elem_id]++;
2237
2238
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 44361 times.
 44361 if (!(che=ff_aac_get_che(ac, elem_type, elem_id))) {
2239 ✗ av_log(ac->avctx, AV_LOG_ERROR, "channel element %d.%d is not allocated\n",
2240 elem_type, elem_id);
2241 ✗ return AVERROR_INVALIDDATA;
2242 }
2243
2/2
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✓ Branch 1 taken 43974 times.
 44361 samples = ac->oc[1].m4ac.frame_length_short ? 960 : 1024;
2244 44361 che->present = 1;
2245 }
2246
2247
6/8
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 72405 switch (elem_type) {
2248
2249 20948 case TYPE_SCE:
2250 20948 err = ff_aac_decode_ics(ac, &che->ch[0], gb, 0, 0);
2251 20948 audio_found = 1;
2252 20948 sce_count++;
2253 20948 break;
2254
2255 19341 case TYPE_CPE:
2256 19341 err = decode_cpe(ac, gb, che);
2257 19341 audio_found = 1;
2258 19341 break;
2259
2260 1174 case TYPE_CCE:
2261 1174 err = ac->proc.decode_cce(ac, gb, che);
2262 1174 break;
2263
2264 2898 case TYPE_LFE:
2265 2898 err = ff_aac_decode_ics(ac, &che->ch[0], gb, 0, 0);
2266 2898 audio_found = 1;
2267 2898 break;
2268
2269 2821 case TYPE_DSE:
2270 2821 err = skip_data_stream_element(ac, gb);
2271 2821 break;
2272
2273 ✗ case TYPE_PCE: {
2274 ✗ uint8_t layout_map[MAX_ELEM_ID*4][3] = {{0}};
2275 int tags;
2276
2277 ✗ int pushed = push_output_configuration(ac);
2278 ✗ if (pce_found && !pushed)
2279 ✗ return AVERROR_INVALIDDATA;
2280
2281 ✗ tags = decode_pce(avctx, &ac->oc[1].m4ac, layout_map, gb,
2282 payload_alignment);
2283 ✗ if (tags < 0) {
2284 ✗ err = tags;
2285 ✗ break;
2286 }
2287 ✗ if (pce_found) {
2288 ✗ av_log(avctx, AV_LOG_ERROR,
2289 "Not evaluating a further program_config_element as this construct is dubious at best.\n");
2290 ✗ pop_output_configuration(ac);
2291 } else {
2292 ✗ err = ff_aac_output_configure(ac, layout_map, tags, OC_TRIAL_PCE, 1);
2293 ✗ if (!err)
2294 ✗ ac->oc[1].m4ac.chan_config = 0;
2295 ✗ pce_found = 1;
2296 }
2297 ✗ break;
2298 }
2299
2300 25223 case TYPE_FIL:
2301
2/2
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✓ Branch 1 taken 8782 times.
 25223 if (elem_id == 15)
2302 16441 elem_id += get_bits(gb, 8) - 1;
2303
1/2
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 25223 if (get_bits_left(gb) < 8 * elem_id) {
2304 ✗ av_log(avctx, AV_LOG_ERROR, "TYPE_FIL: "overread_err);
2305 ✗ return AVERROR_INVALIDDATA;
2306 }
2307 25223 err = 0;
2308
2/2
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✓ Branch 1 taken 25223 times.
 48907 while (elem_id > 0) {
2309 23684 int ret = decode_extension_payload(ac, gb, elem_id, che_prev, che_prev_type);
2310
1/2
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✓ Branch 1 taken 23684 times.
 23684 if (ret < 0) {
2311 ✗ err = ret;
2312 ✗ break;
2313 }
2314 23684 elem_id -= ret;
2315 }
2316 25223 break;
2317
2318 ✗ default:
2319 ✗ err = AVERROR_BUG; /* should not happen, but keeps compiler happy */
2320 ✗ break;
2321 }
2322
2323
2/2
✓ Branch 0 taken 44361 times.
✓ Branch 1 taken 28044 times.
 72405 if (elem_type < TYPE_DSE) {
2324 44361 che_prev = che;
2325 44361 che_prev_type = elem_type;
2326 }
2327
2328
1/2
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✓ Branch 1 taken 72405 times.
 72405 if (err)
2329 ✗ return err;
2330
2331
1/2
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✓ Branch 2 taken 72405 times.
 72405 if (get_bits_left(gb) < 3) {
2332 ✗ av_log(avctx, AV_LOG_ERROR, overread_err);
2333 ✗ return AVERROR_INVALIDDATA;
2334 }
2335 }
2336
2337
1/2
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✓ Branch 1 taken 33133 times.
 33133 if (!avctx->ch_layout.nb_channels)
2338 ✗ return 0;
2339
2340
4/4
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✓ Branch 1 taken 25252 times.
✓ Branch 2 taken 5583 times.
✓ Branch 3 taken 2298 times.
 33133 multiplier = (ac->oc[1].m4ac.sbr == 1) ? ac->oc[1].m4ac.ext_sample_rate > ac->oc[1].m4ac.sample_rate : 0;
2341 33133 samples <<= multiplier;
2342
2343 33133 spectral_to_sample(ac, samples);
2344
2345
2/4
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✗ Branch 1 not taken.
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✗ Branch 3 not taken.
 33133 if (ac->oc[1].status && audio_found) {
2346 33133 avctx->sample_rate = ac->oc[1].m4ac.sample_rate << multiplier;
2347 33133 avctx->frame_size = samples;
2348 33133 ac->oc[1].status = OC_LOCKED;
2349 }
2350
2351
1/4
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✗ Branch 3 not taken.
 33133 if (!ac->frame->data[0] && samples) {
2352 ✗ av_log(avctx, AV_LOG_ERROR, "no frame data found\n");
2353 ✗ return AVERROR_INVALIDDATA;
2354 }
2355
2356
1/2
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✗ Branch 1 not taken.
 33133 if (samples) {
2357 33133 ac->frame->nb_samples = samples;
2358 33133 ac->frame->sample_rate = avctx->sample_rate;
2359 33133 *got_frame_ptr = 1;
2360 } else {
2361 ✗ av_frame_unref(ac->frame);
2362 ✗ *got_frame_ptr = 0;
2363 }
2364
2365 /* for dual-mono audio (SCE + SCE) */
2366
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 33133 is_dmono = ac->dmono_mode && sce_count == 2 &&
2367 ✗ !av_channel_layout_compare(&ac->oc[1].ch_layout,
2368 ✗ &(AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO);
2369
1/2
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✓ Branch 1 taken 33133 times.
 33133 if (is_dmono) {
2370 ✗ if (ac->dmono_mode == 1)
2371 ✗ frame->data[1] = frame->data[0];
2372 ✗ else if (ac->dmono_mode == 2)
2373 ✗ frame->data[0] = frame->data[1];
2374 }
2375
2376 33133 return 0;
2377 }
2378
2379 37017 static int aac_decode_frame_int(AVCodecContext *avctx, AVFrame *frame,
2380 int *got_frame_ptr, GetBitContext *gb,
2381 const AVPacket *avpkt)
2382 {
2383 int err;
2384 37017 AACDecContext *ac = avctx->priv_data;
2385
2386 37017 ac->frame = frame;
2387 37017 *got_frame_ptr = 0;
2388
2389
2/2
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✓ Branch 2 taken 32903 times.
 37017 if (show_bits(gb, 12) == 0xfff) {
2390
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✗ Branch 1 not taken.
✓ Branch 2 taken 4114 times.
 4114 if ((err = parse_adts_frame_header(ac, gb)) < 0) {
2391 ✗ av_log(avctx, AV_LOG_ERROR, "Error decoding AAC frame header.\n");
2392 ✗ goto fail;
2393 }
2394
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 4114 times.
 4114 if (ac->oc[1].m4ac.sampling_index > 12) {
2395 ✗ av_log(ac->avctx, AV_LOG_ERROR, "invalid sampling rate index %d\n", ac->oc[1].m4ac.sampling_index);
2396 ✗ err = AVERROR_INVALIDDATA;
2397 ✗ goto fail;
2398 }
2399 }
2400
2401
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 37017 times.
 37017 if ((err = frame_configure_elements(avctx)) < 0)
2402 ✗ goto fail;
2403
2404 // The AV_PROFILE_AAC_* defines are all object_type - 1
2405 // This may lead to an undefined profile being signaled
2406 37017 ac->avctx->profile = ac->oc[1].m4ac.object_type - 1;
2407
2408 37017 ac->tags_mapped = 0;
2409
2410
2/2
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✓ Branch 1 taken 33133 times.
 37017 if (ac->oc[1].m4ac.object_type == AOT_USAC) {
2411
1/2
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✓ Branch 1 taken 3884 times.
 3884 if (ac->is_fixed) {
2412 ✗ avpriv_report_missing_feature(ac->avctx,
2413 "AAC USAC fixed-point decoding");
2414 ✗ return AVERROR_PATCHWELCOME;
2415 }
2416 #if CONFIG_AAC_DECODER
2417 3884 err = ff_aac_usac_decode_frame(avctx, ac, gb, got_frame_ptr);
2418
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3884 times.
 3884 if (err < 0)
2419 ✗ goto fail;
2420 #endif
2421 } else {
2422 33133 err = decode_frame_ga(avctx, ac, gb, got_frame_ptr);
2423
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 33133 times.
 33133 if (err < 0)
2424 ✗ goto fail;
2425 }
2426
2427 37017 return err;
2428
2429 ✗ fail:
2430 ✗ pop_output_configuration(ac);
2431 ✗ return err;
2432 }
2433
2434 53473 static int aac_decode_frame(AVCodecContext *avctx, AVFrame *frame,
2435 int *got_frame_ptr, AVPacket *avpkt)
2436 {
2437 53473 AACDecContext *ac = avctx->priv_data;
2438 53473 const uint8_t *buf = avpkt->data;
2439 53473 int buf_size = avpkt->size;
2440 GetBitContext gb;
2441 int buf_consumed;
2442 int buf_offset;
2443 int err;
2444 size_t new_extradata_size;
2445 53473 const uint8_t *new_extradata = av_packet_get_side_data(avpkt,
2446 AV_PKT_DATA_NEW_EXTRADATA,
2447 &new_extradata_size);
2448 size_t jp_dualmono_size;
2449 53473 const uint8_t *jp_dualmono = av_packet_get_side_data(avpkt,
2450 AV_PKT_DATA_JP_DUALMONO,
2451 &jp_dualmono_size);
2452
2453
2/2
✓ Branch 0 taken 1 times.
✓ Branch 1 taken 53472 times.
 53473 if (new_extradata) {
2454 /* discard previous configuration */
2455 1 ac->oc[1].status = OC_NONE;
2456 1 err = decode_audio_specific_config(ac, ac->avctx, &ac->oc[1],
2457 new_extradata,
2458 1 new_extradata_size * 8LL, 1);
2459
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1 times.
 1 if (err < 0) {
2460 ✗ return err;
2461 }
2462 }
2463
2464 53473 ac->dmono_mode = 0;
2465
1/4
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✗ Branch 2 not taken.
✗ Branch 3 not taken.
 53473 if (jp_dualmono && jp_dualmono_size > 0)
2466 ✗ ac->dmono_mode = 1 + *jp_dualmono;
2467
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 53473 times.
 53473 if (ac->force_dmono_mode >= 0)
2468 ✗ ac->dmono_mode = ac->force_dmono_mode;
2469
2470
1/2
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 53473 if (INT_MAX / 8 <= buf_size)
2471 ✗ return AVERROR_INVALIDDATA;
2472
2473
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 53473 times.
 53473 if ((err = init_get_bits8(&gb, buf, buf_size)) < 0)
2474 ✗ return err;
2475
2476
2/2
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✓ Branch 1 taken 36502 times.
 53473 switch (ac->oc[1].m4ac.object_type) {
2477 16971 case AOT_ER_AAC_LC:
2478 case AOT_ER_AAC_LTP:
2479 case AOT_ER_AAC_LD:
2480 case AOT_ER_AAC_ELD:
2481 16971 err = aac_decode_er_frame(avctx, frame, got_frame_ptr, &gb);
2482 16971 break;
2483 36502 default:
2484 36502 err = aac_decode_frame_int(avctx, frame, got_frame_ptr, &gb, avpkt);
2485 }
2486
1/2
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✓ Branch 1 taken 53473 times.
 53473 if (err < 0)
2487 ✗ return err;
2488
2489 53473 buf_consumed = (get_bits_count(&gb) + 7) >> 3;
2490
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 53473 times.
 53473 for (buf_offset = buf_consumed; buf_offset < buf_size; buf_offset++)
2491 ✗ if (buf[buf_offset])
2492 ✗ break;
2493
2494
1/2
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✓ Branch 1 taken 53473 times.
 53473 return buf_size > buf_offset ? buf_consumed : buf_size;
2495 }
2496
2497 #if CONFIG_AAC_LATM_DECODER
2498 #include "aacdec_latm.h"
2499 #endif
2500
2501 #define AACDEC_FLAGS AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM
2502 #define OFF(field) offsetof(AACDecContext, field)
2503 static const AVOption options[] = {
2504 /**
2505 * AVOptions for Japanese DTV specific extensions (ADTS only)
2506 */
2507 {"dual_mono_mode", "Select the channel to decode for dual mono",
2508 OFF(force_dmono_mode), AV_OPT_TYPE_INT, {.i64=-1}, -1, 2,
2509 AACDEC_FLAGS, .unit = "dual_mono_mode"},
2510
2511 {"auto", "autoselection", 0, AV_OPT_TYPE_CONST, {.i64=-1}, INT_MIN, INT_MAX, AACDEC_FLAGS, .unit = "dual_mono_mode"},
2512 {"main", "Select Main/Left channel", 0, AV_OPT_TYPE_CONST, {.i64= 1}, INT_MIN, INT_MAX, AACDEC_FLAGS, .unit = "dual_mono_mode"},
2513 {"sub" , "Select Sub/Right channel", 0, AV_OPT_TYPE_CONST, {.i64= 2}, INT_MIN, INT_MAX, AACDEC_FLAGS, .unit = "dual_mono_mode"},
2514 {"both", "Select both channels", 0, AV_OPT_TYPE_CONST, {.i64= 0}, INT_MIN, INT_MAX, AACDEC_FLAGS, .unit = "dual_mono_mode"},
2515
2516 { "channel_order", "Order in which the channels are to be exported",
2517 OFF(output_channel_order), AV_OPT_TYPE_INT,
2518 { .i64 = CHANNEL_ORDER_DEFAULT }, 0, 1, AACDEC_FLAGS, .unit = "channel_order" },
2519 { "default", "normal libavcodec channel order", 0, AV_OPT_TYPE_CONST,
2520 { .i64 = CHANNEL_ORDER_DEFAULT }, .flags = AACDEC_FLAGS, .unit = "channel_order" },
2521 { "coded", "order in which the channels are coded in the bitstream",
2522 0, AV_OPT_TYPE_CONST, { .i64 = CHANNEL_ORDER_CODED }, .flags = AACDEC_FLAGS, .unit = "channel_order" },
2523
2524 {NULL},
2525 };
2526
2527 static const AVClass decoder_class = {
2528 .class_name = "AAC decoder",
2529 .item_name = av_default_item_name,
2530 .option = options,
2531 .version = LIBAVUTIL_VERSION_INT,
2532 };
2533
2534 #if CONFIG_AAC_DECODER
2535 const FFCodec ff_aac_decoder = {
2536 .p.name = "aac",
2537 CODEC_LONG_NAME("AAC (Advanced Audio Coding)"),
2538 .p.type = AVMEDIA_TYPE_AUDIO,
2539 .p.id = AV_CODEC_ID_AAC,
2540 .p.priv_class = &decoder_class,
2541 .priv_data_size = sizeof(AACDecContext),
2542 .init = ff_aac_decode_init_float,
2543 .close = decode_close,
2544 FF_CODEC_DECODE_CB(aac_decode_frame),
2545 .p.sample_fmts = (const enum AVSampleFormat[]) {
2546 AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE
2547 },
2548 .p.capabilities = AV_CODEC_CAP_CHANNEL_CONF | AV_CODEC_CAP_DR1,
2549 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
2550 .p.ch_layouts = ff_aac_ch_layout,
2551 .flush = flush,
2552 .p.profiles = NULL_IF_CONFIG_SMALL(ff_aac_profiles),
2553 };
2554 #endif
2555
2556 #if CONFIG_AAC_FIXED_DECODER
2557 const FFCodec ff_aac_fixed_decoder = {
2558 .p.name = "aac_fixed",
2559 CODEC_LONG_NAME("AAC (Advanced Audio Coding)"),
2560 .p.type = AVMEDIA_TYPE_AUDIO,
2561 .p.id = AV_CODEC_ID_AAC,
2562 .p.priv_class = &decoder_class,
2563 .priv_data_size = sizeof(AACDecContext),
2564 .init = ff_aac_decode_init_fixed,
2565 .close = decode_close,
2566 FF_CODEC_DECODE_CB(aac_decode_frame),
2567 .p.sample_fmts = (const enum AVSampleFormat[]) {
2568 AV_SAMPLE_FMT_S32P, AV_SAMPLE_FMT_NONE
2569 },
2570 .p.capabilities = AV_CODEC_CAP_CHANNEL_CONF | AV_CODEC_CAP_DR1,
2571 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
2572 .p.ch_layouts = ff_aac_ch_layout,
2573 .p.profiles = NULL_IF_CONFIG_SMALL(ff_aac_profiles),
2574 .flush = flush,
2575 };
2576 #endif
2577