FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/iamf_parse.c
Date: 2025-03-08 20:38:41
Exec Total Coverage
Lines: 500 718 69.6%
Functions: 13 14 92.9%
Branches: 223 393 56.7%
Line Branch Exec Source
1 /*
2 * Immersive Audio Model and Formats parsing
3 * Copyright (c) 2023 James Almer <jamrial@gmail.com>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/avassert.h"
23 #include "libavutil/iamf.h"
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/log.h"
26 #include "libavutil/mem.h"
27 #include "libavcodec/get_bits.h"
28 #include "libavcodec/flac.h"
29 #include "libavcodec/leb.h"
30 #include "libavcodec/mpeg4audio.h"
31 #include "libavcodec/put_bits.h"
32 #include "avio_internal.h"
33 #include "iamf_parse.h"
34 #include "isom.h"
35
36 5 static int opus_decoder_config(IAMFCodecConfig *codec_config,
37 AVIOContext *pb, int len)
38 {
39 5 int ret, left = len - avio_tell(pb);
40
41
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 5 if (left < 11 || codec_config->audio_roll_distance >= 0)
42 ✗ return AVERROR_INVALIDDATA;
43
44 5 codec_config->extradata = av_malloc(left + 8);
45
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 5 if (!codec_config->extradata)
46 ✗ return AVERROR(ENOMEM);
47
48 5 AV_WB32A(codec_config->extradata, MKBETAG('O','p','u','s'));
49 5 AV_WB32A(codec_config->extradata + 4, MKBETAG('H','e','a','d'));
50 5 ret = ffio_read_size(pb, codec_config->extradata + 8, left);
51
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 5 if (ret < 0)
52 ✗ return ret;
53
54 5 codec_config->extradata_size = left + 8;
55 5 codec_config->sample_rate = 48000;
56
57 5 return 0;
58 }
59
60 2 static int aac_decoder_config(IAMFCodecConfig *codec_config,
61 AVIOContext *pb, int len, void *logctx)
62 {
63 2 MPEG4AudioConfig cfg = { 0 };
64 int object_type_id, codec_id, stream_type;
65 int ret, tag, left;
66
67
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 2 if (codec_config->audio_roll_distance >= 0)
68 ✗ return AVERROR_INVALIDDATA;
69
70 2 ff_mp4_read_descr(logctx, pb, &tag);
71
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 2 if (tag != MP4DecConfigDescrTag)
72 ✗ return AVERROR_INVALIDDATA;
73
74 2 object_type_id = avio_r8(pb);
75
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 2 if (object_type_id != 0x40)
76 ✗ return AVERROR_INVALIDDATA;
77
78 2 stream_type = avio_r8(pb);
79
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 2 if (((stream_type >> 2) != 5) || ((stream_type >> 1) & 1))
80 ✗ return AVERROR_INVALIDDATA;
81
82 2 avio_skip(pb, 3); // buffer size db
83 2 avio_skip(pb, 4); // rc_max_rate
84 2 avio_skip(pb, 4); // avg bitrate
85
86 2 codec_id = ff_codec_get_id(ff_mp4_obj_type, object_type_id);
87
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 2 if (codec_id && codec_id != codec_config->codec_id)
88 ✗ return AVERROR_INVALIDDATA;
89
90 2 left = ff_mp4_read_descr(logctx, pb, &tag);
91
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 2 if (tag != MP4DecSpecificDescrTag ||
92
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 2 !left || left > (len - avio_tell(pb)))
93 ✗ return AVERROR_INVALIDDATA;
94
95 // We pad extradata here because avpriv_mpeg4audio_get_config2() needs it.
96 2 codec_config->extradata = av_malloc((size_t)left + AV_INPUT_BUFFER_PADDING_SIZE);
97
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 2 if (!codec_config->extradata)
98 ✗ return AVERROR(ENOMEM);
99
100 2 ret = ffio_read_size(pb, codec_config->extradata, left);
101
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 2 if (ret < 0)
102 ✗ return ret;
103 2 codec_config->extradata_size = left;
104 2 memset(codec_config->extradata + codec_config->extradata_size, 0,
105 AV_INPUT_BUFFER_PADDING_SIZE);
106
107 2 ret = avpriv_mpeg4audio_get_config2(&cfg, codec_config->extradata,
108 codec_config->extradata_size, 1, logctx);
109
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 2 if (ret < 0)
110 ✗ return ret;
111
112 2 codec_config->sample_rate = cfg.sample_rate;
113
114 2 return 0;
115 }
116
117 20 static int flac_decoder_config(IAMFCodecConfig *codec_config,
118 AVIOContext *pb, int len)
119 {
120 int ret, left;
121
122
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 20 if (codec_config->audio_roll_distance)
123 ✗ return AVERROR_INVALIDDATA;
124
125 20 avio_skip(pb, 4); // METADATA_BLOCK_HEADER
126
127 20 left = len - avio_tell(pb);
128
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 20 if (left < FLAC_STREAMINFO_SIZE)
129 ✗ return AVERROR_INVALIDDATA;
130
131 20 codec_config->extradata = av_malloc(left);
132
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 20 if (!codec_config->extradata)
133 ✗ return AVERROR(ENOMEM);
134
135 20 ret = ffio_read_size(pb, codec_config->extradata, left);
136
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 20 if (ret < 0)
137 ✗ return ret;
138
139 20 codec_config->extradata_size = left;
140 20 codec_config->sample_rate = AV_RB24(codec_config->extradata + 10) >> 4;
141
142 20 return 0;
143 }
144
145 ✗ static int ipcm_decoder_config(IAMFCodecConfig *codec_config,
146 AVIOContext *pb, int len)
147 {
148 static const enum AVCodecID sample_fmt[2][3] = {
149 { AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S24BE, AV_CODEC_ID_PCM_S32BE },
150 { AV_CODEC_ID_PCM_S16LE, AV_CODEC_ID_PCM_S24LE, AV_CODEC_ID_PCM_S32LE },
151 };
152 ✗ int sample_format = avio_r8(pb); // 0 = BE, 1 = LE
153 ✗ int sample_size = (avio_r8(pb) / 8 - 2); // 16, 24, 32
154 ✗ if (sample_format > 1 || sample_size > 2U || codec_config->audio_roll_distance)
155 ✗ return AVERROR_INVALIDDATA;
156
157 ✗ codec_config->codec_id = sample_fmt[sample_format][sample_size];
158 ✗ codec_config->sample_rate = avio_rb32(pb);
159
160 ✗ if (len - avio_tell(pb))
161 ✗ return AVERROR_INVALIDDATA;
162
163 ✗ return 0;
164 }
165
166 27 static int codec_config_obu(void *s, IAMFContext *c, AVIOContext *pb, int len)
167 {
168 27 IAMFCodecConfig **tmp, *codec_config = NULL;
169 FFIOContext b;
170 AVIOContext *pbc;
171 uint8_t *buf;
172 enum AVCodecID avcodec_id;
173 unsigned codec_config_id, nb_samples, codec_id;
174 int16_t audio_roll_distance;
175 int ret;
176
177 27 buf = av_malloc(len);
178
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 27 if (!buf)
179 ✗ return AVERROR(ENOMEM);
180
181 27 ret = ffio_read_size(pb, buf, len);
182
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 27 if (ret < 0)
183 ✗ goto fail;
184
185 27 ffio_init_context(&b, buf, len, 0, NULL, NULL, NULL, NULL);
186 27 pbc = &b.pub;
187
188 27 codec_config_id = ffio_read_leb(pbc);
189 27 codec_id = avio_rb32(pbc);
190 27 nb_samples = ffio_read_leb(pbc);
191 27 audio_roll_distance = avio_rb16(pbc);
192
193
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 27 switch(codec_id) {
194 5 case MKBETAG('O','p','u','s'):
195 5 avcodec_id = AV_CODEC_ID_OPUS;
196 5 break;
197 2 case MKBETAG('m','p','4','a'):
198 2 avcodec_id = AV_CODEC_ID_AAC;
199 2 break;
200 20 case MKBETAG('f','L','a','C'):
201 20 avcodec_id = AV_CODEC_ID_FLAC;
202 20 break;
203 ✗ default:
204 ✗ avcodec_id = AV_CODEC_ID_NONE;
205 ✗ break;
206 }
207
208
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 27 for (int i = 0; i < c->nb_codec_configs; i++)
209 ✗ if (c->codec_configs[i]->codec_config_id == codec_config_id) {
210 ✗ ret = AVERROR_INVALIDDATA;
211 ✗ goto fail;
212 }
213
214 27 tmp = av_realloc_array(c->codec_configs, c->nb_codec_configs + 1, sizeof(*c->codec_configs));
215
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 27 if (!tmp) {
216 ✗ ret = AVERROR(ENOMEM);
217 ✗ goto fail;
218 }
219 27 c->codec_configs = tmp;
220
221 27 codec_config = av_mallocz(sizeof(*codec_config));
222
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 27 if (!codec_config) {
223 ✗ ret = AVERROR(ENOMEM);
224 ✗ goto fail;
225 }
226
227 27 codec_config->codec_config_id = codec_config_id;
228 27 codec_config->codec_id = avcodec_id;
229 27 codec_config->nb_samples = nb_samples;
230 27 codec_config->audio_roll_distance = audio_roll_distance;
231
232
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 27 switch(codec_id) {
233 5 case MKBETAG('O','p','u','s'):
234 5 ret = opus_decoder_config(codec_config, pbc, len);
235 5 break;
236 2 case MKBETAG('m','p','4','a'):
237 2 ret = aac_decoder_config(codec_config, pbc, len, s);
238 2 break;
239 20 case MKBETAG('f','L','a','C'):
240 20 ret = flac_decoder_config(codec_config, pbc, len);
241 20 break;
242 ✗ case MKBETAG('i','p','c','m'):
243 ✗ ret = ipcm_decoder_config(codec_config, pbc, len);
244 ✗ break;
245 ✗ default:
246 ✗ break;
247 }
248
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 27 if (ret < 0)
249 ✗ goto fail;
250
251
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 27 if ((codec_config->nb_samples > INT_MAX) || codec_config->nb_samples <= 0 ||
252
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 27 (-codec_config->audio_roll_distance > INT_MAX / codec_config->nb_samples)) {
253 ✗ ret = AVERROR_INVALIDDATA;
254 ✗ goto fail;
255 }
256
257 27 c->codec_configs[c->nb_codec_configs++] = codec_config;
258
259 27 len -= avio_tell(pbc);
260
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 27 if (len)
261 ✗ av_log(s, AV_LOG_WARNING, "Underread in codec_config_obu. %d bytes left at the end\n", len);
262
263 27 ret = 0;
264 27 fail:
265 27 av_free(buf);
266
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 27 if (ret < 0) {
267 ✗ if (codec_config)
268 ✗ av_free(codec_config->extradata);
269 ✗ av_free(codec_config);
270 }
271 27 return ret;
272 }
273
274 128 static int update_extradata(AVCodecParameters *codecpar)
275 {
276 GetBitContext gb;
277 PutBitContext pb;
278 int ret;
279
280
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 128 switch(codecpar->codec_id) {
281 20 case AV_CODEC_ID_OPUS:
282 20 AV_WB8(codecpar->extradata + 9, codecpar->ch_layout.nb_channels);
283 20 AV_WL16A(codecpar->extradata + 10, AV_RB16A(codecpar->extradata + 10)); // Byte swap pre-skip
284 20 AV_WL32A(codecpar->extradata + 12, AV_RB32A(codecpar->extradata + 12)); // Byte swap sample rate
285 20 AV_WL16A(codecpar->extradata + 16, AV_RB16A(codecpar->extradata + 16)); // Byte swap Output Gain
286 20 break;
287 2 case AV_CODEC_ID_AAC: {
288 uint8_t buf[5];
289
290 2 init_put_bits(&pb, buf, sizeof(buf));
291 2 ret = init_get_bits8(&gb, codecpar->extradata, codecpar->extradata_size);
292
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 2 if (ret < 0)
293 ✗ return ret;
294
295 2 ret = get_bits(&gb, 5);
296 2 put_bits(&pb, 5, ret);
297
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 2 if (ret == AOT_ESCAPE) // violates section 3.11.2, but better check for it
298 ✗ put_bits(&pb, 6, get_bits(&gb, 6));
299 2 ret = get_bits(&gb, 4);
300 2 put_bits(&pb, 4, ret);
301
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 2 if (ret == 0x0f)
302 ✗ put_bits(&pb, 24, get_bits(&gb, 24));
303
304 2 skip_bits(&gb, 4);
305 2 put_bits(&pb, 4, codecpar->ch_layout.nb_channels); // set channel config
306 2 ret = put_bits_left(&pb);
307 2 put_bits(&pb, ret, get_bits_long(&gb, ret));
308 2 flush_put_bits(&pb);
309
310 2 memcpy(codecpar->extradata, buf, put_bytes_output(&pb));
311 2 break;
312 }
313 106 case AV_CODEC_ID_FLAC: {
314 uint8_t buf[13];
315
316 106 init_put_bits(&pb, buf, sizeof(buf));
317 106 ret = init_get_bits8(&gb, codecpar->extradata, codecpar->extradata_size);
318
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 106 if (ret < 0)
319 ✗ return ret;
320
321 106 put_bits32(&pb, get_bits_long(&gb, 32)); // min/max blocksize
322 106 put_bits64(&pb, 48, get_bits64(&gb, 48)); // min/max framesize
323 106 put_bits(&pb, 20, get_bits(&gb, 20)); // samplerate
324 106 skip_bits(&gb, 3);
325 106 put_bits(&pb, 3, codecpar->ch_layout.nb_channels - 1);
326 106 ret = put_bits_left(&pb);
327 106 put_bits(&pb, ret, get_bits(&gb, ret));
328 106 flush_put_bits(&pb);
329
330 106 memcpy(codecpar->extradata, buf, sizeof(buf));
331 106 break;
332 }
333 }
334
335 128 return 0;
336 }
337
338 25 static int scalable_channel_layout_config(void *s, AVIOContext *pb,
339 IAMFAudioElement *audio_element,
340 const IAMFCodecConfig *codec_config)
341 {
342 25 int nb_layers, k = 0;
343
344 25 nb_layers = avio_r8(pb) >> 5; // get_bits(&gb, 3);
345 // skip_bits(&gb, 5); //reserved
346
347
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 25 if (nb_layers > 6 || nb_layers == 0)
348 ✗ return AVERROR_INVALIDDATA;
349
350 25 audio_element->layers = av_calloc(nb_layers, sizeof(*audio_element->layers));
351
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 25 if (!audio_element->layers)
352 ✗ return AVERROR(ENOMEM);
353
354 25 audio_element->nb_layers = nb_layers;
355
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 85 for (int i = 0; i < nb_layers; i++) {
356 AVIAMFLayer *layer;
357 int loudspeaker_layout, output_gain_is_present_flag;
358 int substream_count, coupled_substream_count;
359 60 int expanded_loudspeaker_layout = -1;
360 60 int ret, byte = avio_r8(pb);
361
362 60 layer = av_iamf_audio_element_add_layer(audio_element->element);
363
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 60 if (!layer)
364 ✗ return AVERROR(ENOMEM);
365
366 60 loudspeaker_layout = byte >> 4; // get_bits(&gb, 4);
367 60 output_gain_is_present_flag = (byte >> 3) & 1; //get_bits1(&gb);
368
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 60 if ((byte >> 2) & 1)
369 5 layer->flags |= AV_IAMF_LAYER_FLAG_RECON_GAIN;
370 60 substream_count = avio_r8(pb);
371 60 coupled_substream_count = avio_r8(pb);
372
373
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 60 if (substream_count + k > audio_element->nb_substreams)
374 ✗ return AVERROR_INVALIDDATA;
375
376 60 audio_element->layers[i].substream_count = substream_count;
377 60 audio_element->layers[i].coupled_substream_count = coupled_substream_count;
378
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 60 if (output_gain_is_present_flag) {
379 ✗ layer->output_gain_flags = avio_r8(pb) >> 2; // get_bits(&gb, 6);
380 ✗ layer->output_gain = av_make_q(sign_extend(avio_rb16(pb), 16), 1 << 8);
381 }
382
383
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 60 if (!i && loudspeaker_layout == 15)
384 2 expanded_loudspeaker_layout = avio_r8(pb);
385
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 60 if (expanded_loudspeaker_layout > 0 && expanded_loudspeaker_layout < 13)
386 2 av_channel_layout_copy(&layer->ch_layout, &ff_iamf_expanded_scalable_ch_layouts[expanded_loudspeaker_layout]);
387
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 58 else if (loudspeaker_layout < 10)
388 58 av_channel_layout_copy(&layer->ch_layout, &ff_iamf_scalable_ch_layouts[loudspeaker_layout]);
389 else
390 ✗ layer->ch_layout = (AVChannelLayout){ .order = AV_CHANNEL_ORDER_UNSPEC,
391 ✗ .nb_channels = substream_count +
392 coupled_substream_count };
393
394
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 172 for (int j = 0; j < substream_count; j++) {
395 112 IAMFSubStream *substream = &audio_element->substreams[k++];
396
397
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 112 substream->codecpar->ch_layout = coupled_substream_count-- > 0 ? (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO :
398 (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
399
400 112 ret = update_extradata(substream->codecpar);
401
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 112 if (ret < 0)
402 ✗ return ret;
403 }
404
405 }
406
407 25 return 0;
408 }
409
410 4 static int ambisonics_config(void *s, AVIOContext *pb,
411 IAMFAudioElement *audio_element,
412 const IAMFCodecConfig *codec_config)
413 {
414 AVIAMFLayer *layer;
415 unsigned ambisonics_mode;
416 int output_channel_count, substream_count, order;
417 int ret;
418
419 4 ambisonics_mode = ffio_read_leb(pb);
420
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 4 if (ambisonics_mode > 1)
421 ✗ return AVERROR_INVALIDDATA;
422
423 4 output_channel_count = avio_r8(pb); // C
424 4 substream_count = avio_r8(pb); // N
425
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 4 if (audio_element->nb_substreams != substream_count || output_channel_count == 0)
426 ✗ return AVERROR_INVALIDDATA;
427
428 4 order = floor(sqrt(output_channel_count - 1));
429 /* incomplete order - some harmonics are missing */
430
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 4 if ((order + 1) * (order + 1) != output_channel_count)
431 ✗ return AVERROR_INVALIDDATA;
432
433 4 audio_element->layers = av_mallocz(sizeof(*audio_element->layers));
434
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 4 if (!audio_element->layers)
435 ✗ return AVERROR(ENOMEM);
436
437 4 audio_element->nb_layers = 1;
438 4 audio_element->layers->substream_count = substream_count;
439
440 4 layer = av_iamf_audio_element_add_layer(audio_element->element);
441
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 4 if (!layer)
442 ✗ return AVERROR(ENOMEM);
443
444 4 layer->ambisonics_mode = ambisonics_mode;
445
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 4 if (ambisonics_mode == 0) {
446
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 20 for (int i = 0; i < substream_count; i++) {
447 16 IAMFSubStream *substream = &audio_element->substreams[i];
448
449 16 substream->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
450
451 16 ret = update_extradata(substream->codecpar);
452
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 16 if (ret < 0)
453 ✗ return ret;
454 }
455
456 4 layer->ch_layout.order = AV_CHANNEL_ORDER_CUSTOM;
457 4 layer->ch_layout.nb_channels = output_channel_count;
458 4 layer->ch_layout.u.map = av_calloc(output_channel_count, sizeof(*layer->ch_layout.u.map));
459
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 4 if (!layer->ch_layout.u.map)
460 ✗ return AVERROR(ENOMEM);
461
462
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 20 for (int i = 0; i < output_channel_count; i++)
463 16 layer->ch_layout.u.map[i].id = avio_r8(pb) + AV_CHAN_AMBISONIC_BASE;
464 } else {
465 ✗ int coupled_substream_count = avio_r8(pb); // M
466 ✗ int nb_demixing_matrix = substream_count + coupled_substream_count;
467 ✗ int demixing_matrix_size = nb_demixing_matrix * output_channel_count;
468
469 ✗ audio_element->layers->coupled_substream_count = coupled_substream_count;
470
471 ✗ layer->ch_layout = (AVChannelLayout){ .order = AV_CHANNEL_ORDER_AMBISONIC, .nb_channels = output_channel_count };
472 ✗ layer->demixing_matrix = av_malloc_array(demixing_matrix_size, sizeof(*layer->demixing_matrix));
473 ✗ if (!layer->demixing_matrix)
474 ✗ return AVERROR(ENOMEM);
475
476 ✗ for (int i = 0; i < demixing_matrix_size; i++)
477 ✗ layer->demixing_matrix[i] = av_make_q(sign_extend(avio_rb16(pb), 16), 1 << 8);
478
479 ✗ for (int i = 0; i < substream_count; i++) {
480 ✗ IAMFSubStream *substream = &audio_element->substreams[i];
481
482 ✗ substream->codecpar->ch_layout = coupled_substream_count-- > 0 ? (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO :
483 (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
484
485
486 ✗ ret = update_extradata(substream->codecpar);
487 ✗ if (ret < 0)
488 ✗ return ret;
489 }
490 }
491
492 4 return 0;
493 }
494
495 84 static int param_parse(void *s, IAMFContext *c, AVIOContext *pb,
496 unsigned int type,
497 const IAMFAudioElement *audio_element,
498 AVIAMFParamDefinition **out_param_definition)
499 {
500 84 IAMFParamDefinition *param_definition = NULL;
501 AVIAMFParamDefinition *param;
502 unsigned int parameter_id, parameter_rate, mode;
503 84 unsigned int duration = 0, constant_subblock_duration = 0, nb_subblocks = 0;
504 84 unsigned int total_duration = 0;
505 size_t param_size;
506
507 84 parameter_id = ffio_read_leb(pb);
508
509
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 129 for (int i = 0; i < c->nb_param_definitions; i++)
510
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 82 if (c->param_definitions[i]->param->parameter_id == parameter_id) {
511 37 param_definition = c->param_definitions[i];
512 37 break;
513 }
514
515 84 parameter_rate = ffio_read_leb(pb);
516 84 mode = avio_r8(pb) >> 7;
517
518
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 84 if (mode == 0) {
519 20 duration = ffio_read_leb(pb);
520
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 20 if (!duration)
521 ✗ return AVERROR_INVALIDDATA;
522 20 constant_subblock_duration = ffio_read_leb(pb);
523
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 20 if (constant_subblock_duration == 0)
524 ✗ nb_subblocks = ffio_read_leb(pb);
525 else {
526 20 nb_subblocks = duration / constant_subblock_duration;
527 20 total_duration = duration;
528 }
529 }
530
531 84 param = av_iamf_param_definition_alloc(type, nb_subblocks, &param_size);
532
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 84 if (!param)
533 ✗ return AVERROR(ENOMEM);
534
535
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 104 for (int i = 0; i < nb_subblocks; i++) {
536 20 void *subblock = av_iamf_param_definition_get_subblock(param, i);
537 20 unsigned int subblock_duration = constant_subblock_duration;
538
539
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 20 if (constant_subblock_duration == 0) {
540 ✗ subblock_duration = ffio_read_leb(pb);
541 ✗ total_duration += subblock_duration;
542
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 20 } else if (i == nb_subblocks - 1)
543 20 subblock_duration = duration - i * constant_subblock_duration;
544
545
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 20 switch (type) {
546 ✗ case AV_IAMF_PARAMETER_DEFINITION_MIX_GAIN: {
547 ✗ AVIAMFMixGain *mix = subblock;
548 ✗ mix->subblock_duration = subblock_duration;
549 ✗ break;
550 }
551 15 case AV_IAMF_PARAMETER_DEFINITION_DEMIXING: {
552 15 AVIAMFDemixingInfo *demix = subblock;
553 15 demix->subblock_duration = subblock_duration;
554 // DefaultDemixingInfoParameterData
555
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 15 av_assert0(audio_element);
556 15 demix->dmixp_mode = avio_r8(pb) >> 5;
557 15 audio_element->element->default_w = avio_r8(pb) >> 4;
558 15 break;
559 }
560 5 case AV_IAMF_PARAMETER_DEFINITION_RECON_GAIN: {
561 5 AVIAMFReconGain *recon = subblock;
562 5 recon->subblock_duration = subblock_duration;
563 5 break;
564 }
565 ✗ default:
566 ✗ av_free(param);
567 ✗ return AVERROR_INVALIDDATA;
568 }
569 }
570
571
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 84 if (!mode && !constant_subblock_duration && total_duration != duration) {
572 ✗ av_log(s, AV_LOG_ERROR, "Invalid subblock durations in parameter_id %u\n", parameter_id);
573 ✗ av_free(param);
574 ✗ return AVERROR_INVALIDDATA;
575 }
576
577 84 param->parameter_id = parameter_id;
578 84 param->parameter_rate = parameter_rate;
579 84 param->duration = duration;
580 84 param->constant_subblock_duration = constant_subblock_duration;
581 84 param->nb_subblocks = nb_subblocks;
582
583
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 84 if (param_definition) {
584
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 37 if (param_definition->param_size != param_size || memcmp(param_definition->param, param, param_size)) {
585 ✗ av_log(s, AV_LOG_ERROR, "Incosistent parameters for parameter_id %u\n", parameter_id);
586 ✗ av_free(param);
587 ✗ return AVERROR_INVALIDDATA;
588 }
589 } else {
590 47 IAMFParamDefinition **tmp = av_realloc_array(c->param_definitions, c->nb_param_definitions + 1,
591 sizeof(*c->param_definitions));
592
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 47 if (!tmp) {
593 ✗ av_free(param);
594 ✗ return AVERROR(ENOMEM);
595 }
596 47 c->param_definitions = tmp;
597
598 47 param_definition = av_mallocz(sizeof(*param_definition));
599
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 47 if (!param_definition) {
600 ✗ av_free(param);
601 ✗ return AVERROR(ENOMEM);
602 }
603 47 param_definition->param = param;
604 47 param_definition->mode = !mode;
605 47 param_definition->param_size = param_size;
606 47 param_definition->audio_element = audio_element;
607
608 47 c->param_definitions[c->nb_param_definitions++] = param_definition;
609 }
610
611
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 84 av_assert0(out_param_definition);
612 84 *out_param_definition = param;
613
614 84 return 0;
615 }
616
617 29 static int audio_element_obu(void *s, IAMFContext *c, AVIOContext *pb, int len)
618 {
619 const IAMFCodecConfig *codec_config;
620 AVIAMFAudioElement *element;
621 29 IAMFAudioElement **tmp, *audio_element = NULL;
622 FFIOContext b;
623 AVIOContext *pbc;
624 uint8_t *buf;
625 unsigned audio_element_id, nb_substreams, codec_config_id, num_parameters;
626 int audio_element_type, ret;
627
628 29 buf = av_malloc(len);
629
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 29 if (!buf)
630 ✗ return AVERROR(ENOMEM);
631
632 29 ret = ffio_read_size(pb, buf, len);
633
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 29 if (ret < 0)
634 ✗ goto fail;
635
636 29 ffio_init_context(&b, buf, len, 0, NULL, NULL, NULL, NULL);
637 29 pbc = &b.pub;
638
639 29 audio_element_id = ffio_read_leb(pbc);
640
641
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 31 for (int i = 0; i < c->nb_audio_elements; i++)
642
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 2 if (c->audio_elements[i]->audio_element_id == audio_element_id) {
643 ✗ av_log(s, AV_LOG_ERROR, "Duplicate audio_element_id %d\n", audio_element_id);
644 ✗ ret = AVERROR_INVALIDDATA;
645 ✗ goto fail;
646 }
647
648 29 audio_element_type = avio_r8(pbc) >> 5;
649
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 29 if (audio_element_type > AV_IAMF_AUDIO_ELEMENT_TYPE_SCENE) {
650 ✗ av_log(s, AV_LOG_DEBUG, "Unknown audio_element_type referenced in an audio element. Ignoring\n");
651 ✗ ret = 0;
652 ✗ goto fail;
653 }
654
655 29 codec_config_id = ffio_read_leb(pbc);
656
657 29 codec_config = ff_iamf_get_codec_config(c, codec_config_id);
658
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 29 if (!codec_config) {
659 ✗ av_log(s, AV_LOG_ERROR, "Non existant codec config id %d referenced in an audio element\n", codec_config_id);
660 ✗ ret = AVERROR_INVALIDDATA;
661 ✗ goto fail;
662 }
663
664
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 29 if (codec_config->codec_id == AV_CODEC_ID_NONE) {
665 ✗ av_log(s, AV_LOG_DEBUG, "Unknown codec id referenced in an audio element. Ignoring\n");
666 ✗ ret = 0;
667 ✗ goto fail;
668 }
669
670 29 tmp = av_realloc_array(c->audio_elements, c->nb_audio_elements + 1, sizeof(*c->audio_elements));
671
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 29 if (!tmp) {
672 ✗ ret = AVERROR(ENOMEM);
673 ✗ goto fail;
674 }
675 29 c->audio_elements = tmp;
676
677 29 audio_element = av_mallocz(sizeof(*audio_element));
678
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 29 if (!audio_element) {
679 ✗ ret = AVERROR(ENOMEM);
680 ✗ goto fail;
681 }
682
683 29 nb_substreams = ffio_read_leb(pbc);
684 29 audio_element->codec_config_id = codec_config_id;
685 29 audio_element->audio_element_id = audio_element_id;
686 29 audio_element->substreams = av_calloc(nb_substreams, sizeof(*audio_element->substreams));
687
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 29 if (!audio_element->substreams) {
688 ✗ ret = AVERROR(ENOMEM);
689 ✗ goto fail;
690 }
691 29 audio_element->nb_substreams = nb_substreams;
692
693 29 element = audio_element->element = av_iamf_audio_element_alloc();
694
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 29 if (!element) {
695 ✗ ret = AVERROR(ENOMEM);
696 ✗ goto fail;
697 }
698 29 audio_element->celement = element;
699
700 29 element->audio_element_type = audio_element_type;
701
702
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 157 for (int i = 0; i < audio_element->nb_substreams; i++) {
703 128 IAMFSubStream *substream = &audio_element->substreams[i];
704
705 128 substream->codecpar = avcodec_parameters_alloc();
706
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 128 if (!substream->codecpar) {
707 ✗ ret = AVERROR(ENOMEM);
708 ✗ goto fail;
709 }
710
711 128 substream->audio_substream_id = ffio_read_leb(pbc);
712
713 128 substream->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
714 128 substream->codecpar->codec_id = codec_config->codec_id;
715 128 substream->codecpar->frame_size = codec_config->nb_samples;
716 128 substream->codecpar->sample_rate = codec_config->sample_rate;
717 128 substream->codecpar->seek_preroll = -codec_config->audio_roll_distance * codec_config->nb_samples;
718
719
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 128 switch(substream->codecpar->codec_id) {
720 128 case AV_CODEC_ID_AAC:
721 case AV_CODEC_ID_FLAC:
722 case AV_CODEC_ID_OPUS:
723 128 substream->codecpar->extradata = av_malloc(codec_config->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
724
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 128 if (!substream->codecpar->extradata) {
725 ✗ ret = AVERROR(ENOMEM);
726 ✗ goto fail;
727 }
728 128 memcpy(substream->codecpar->extradata, codec_config->extradata, codec_config->extradata_size);
729 128 memset(substream->codecpar->extradata + codec_config->extradata_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
730 128 substream->codecpar->extradata_size = codec_config->extradata_size;
731 128 break;
732 }
733 }
734
735 29 num_parameters = ffio_read_leb(pbc);
736
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 29 if (num_parameters > 2 && audio_element_type == 0) {
737 ✗ av_log(s, AV_LOG_ERROR, "Audio Element parameter count %u is invalid"
738 " for Channel representations\n", num_parameters);
739 ✗ ret = AVERROR_INVALIDDATA;
740 ✗ goto fail;
741 }
742
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 29 if (num_parameters && audio_element_type != 0) {
743 ✗ av_log(s, AV_LOG_ERROR, "Audio Element parameter count %u is invalid"
744 " for Scene representations\n", num_parameters);
745 ✗ ret = AVERROR_INVALIDDATA;
746 ✗ goto fail;
747 }
748
749
2/2
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 49 for (int i = 0; i < num_parameters; i++) {
750 unsigned type;
751
752 20 type = ffio_read_leb(pbc);
753
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 20 if (type == AV_IAMF_PARAMETER_DEFINITION_MIX_GAIN)
754 ✗ ret = AVERROR_INVALIDDATA;
755
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 20 else if (type == AV_IAMF_PARAMETER_DEFINITION_DEMIXING) {
756
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 15 if (element->demixing_info) {
757 ✗ ret = AVERROR_INVALIDDATA;
758 ✗ goto fail;
759 }
760 15 ret = param_parse(s, c, pbc, type, audio_element, &element->demixing_info);
761
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 5 } else if (type == AV_IAMF_PARAMETER_DEFINITION_RECON_GAIN) {
762
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 5 if (element->recon_gain_info) {
763 ✗ ret = AVERROR_INVALIDDATA;
764 ✗ goto fail;
765 }
766 5 ret = param_parse(s, c, pbc, type, audio_element, &element->recon_gain_info);
767 } else {
768 ✗ unsigned param_definition_size = ffio_read_leb(pbc);
769 ✗ avio_skip(pbc, param_definition_size);
770 }
771
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 20 if (ret < 0)
772 ✗ goto fail;
773 }
774
775
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 29 if (audio_element_type == AV_IAMF_AUDIO_ELEMENT_TYPE_CHANNEL) {
776 25 ret = scalable_channel_layout_config(s, pbc, audio_element, codec_config);
777
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 25 if (ret < 0)
778 ✗ goto fail;
779
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 4 } else if (audio_element_type == AV_IAMF_AUDIO_ELEMENT_TYPE_SCENE) {
780 4 ret = ambisonics_config(s, pbc, audio_element, codec_config);
781
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 4 if (ret < 0)
782 ✗ goto fail;
783 } else {
784 ✗ av_assert0(0);
785 }
786
787 29 c->audio_elements[c->nb_audio_elements++] = audio_element;
788
789 29 len -= avio_tell(pbc);
790
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 29 if (len)
791 ✗ av_log(s, AV_LOG_WARNING, "Underread in audio_element_obu. %d bytes left at the end\n", len);
792
793 29 ret = 0;
794 29 fail:
795 29 av_free(buf);
796
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 29 if (ret < 0)
797 ✗ ff_iamf_free_audio_element(&audio_element);
798 29 return ret;
799 }
800
801 87 static int label_string(AVIOContext *pb, char **label)
802 {
803 uint8_t buf[128];
804
805 87 avio_get_str(pb, sizeof(buf), buf, sizeof(buf));
806
807
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 87 if (pb->error)
808 ✗ return pb->error;
809
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 87 if (pb->eof_reached)
810 ✗ return AVERROR_INVALIDDATA;
811 87 *label = av_strdup(buf);
812
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 87 if (!*label)
813 ✗ return AVERROR(ENOMEM);
814
815 87 return 0;
816 }
817
818 27 static int mix_presentation_obu(void *s, IAMFContext *c, AVIOContext *pb, int len)
819 {
820 AVIAMFMixPresentation *mix;
821 27 IAMFMixPresentation **tmp, *mix_presentation = NULL;
822 FFIOContext b;
823 AVIOContext *pbc;
824 uint8_t *buf;
825 unsigned nb_submixes, mix_presentation_id;
826 int ret;
827
828 27 buf = av_malloc(len);
829
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 27 if (!buf)
830 ✗ return AVERROR(ENOMEM);
831
832 27 ret = ffio_read_size(pb, buf, len);
833
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 27 if (ret < 0)
834 ✗ goto fail;
835
836 27 ffio_init_context(&b, buf, len, 0, NULL, NULL, NULL, NULL);
837 27 pbc = &b.pub;
838
839 27 mix_presentation_id = ffio_read_leb(pbc);
840
841
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 27 for (int i = 0; i < c->nb_mix_presentations; i++)
842 ✗ if (c->mix_presentations[i]->mix_presentation_id == mix_presentation_id) {
843 ✗ av_log(s, AV_LOG_ERROR, "Duplicate mix_presentation_id %d\n", mix_presentation_id);
844 ✗ ret = AVERROR_INVALIDDATA;
845 ✗ goto fail;
846 }
847
848 27 tmp = av_realloc_array(c->mix_presentations, c->nb_mix_presentations + 1, sizeof(*c->mix_presentations));
849
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 27 if (!tmp) {
850 ✗ ret = AVERROR(ENOMEM);
851 ✗ goto fail;
852 }
853 27 c->mix_presentations = tmp;
854
855 27 mix_presentation = av_mallocz(sizeof(*mix_presentation));
856
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 27 if (!mix_presentation) {
857 ✗ ret = AVERROR(ENOMEM);
858 ✗ goto fail;
859 }
860
861 27 mix_presentation->mix_presentation_id = mix_presentation_id;
862 27 mix = mix_presentation->mix = av_iamf_mix_presentation_alloc();
863
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 27 if (!mix) {
864 ✗ ret = AVERROR(ENOMEM);
865 ✗ goto fail;
866 }
867 27 mix_presentation->cmix = mix;
868
869 27 mix_presentation->count_label = ffio_read_leb(pbc);
870 27 mix_presentation->language_label = av_calloc(mix_presentation->count_label,
871 sizeof(*mix_presentation->language_label));
872
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 27 if (!mix_presentation->language_label) {
873 ✗ mix_presentation->count_label = 0;
874 ✗ ret = AVERROR(ENOMEM);
875 ✗ goto fail;
876 }
877
878
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 54 for (int i = 0; i < mix_presentation->count_label; i++) {
879 27 ret = label_string(pbc, &mix_presentation->language_label[i]);
880
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 27 if (ret < 0)
881 ✗ goto fail;
882 }
883
884
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 54 for (int i = 0; i < mix_presentation->count_label; i++) {
885 27 char *annotation = NULL;
886 27 ret = label_string(pbc, &annotation);
887
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 27 if (ret < 0)
888 ✗ goto fail;
889 27 ret = av_dict_set(&mix->annotations, mix_presentation->language_label[i], annotation,
890 AV_DICT_DONT_STRDUP_VAL | AV_DICT_DONT_OVERWRITE);
891
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 27 if (ret < 0)
892 ✗ goto fail;
893 }
894
895 27 nb_submixes = ffio_read_leb(pbc);
896
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 58 for (int i = 0; i < nb_submixes; i++) {
897 AVIAMFSubmix *sub_mix;
898 unsigned nb_elements, nb_layouts;
899
900 31 sub_mix = av_iamf_mix_presentation_add_submix(mix);
901
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 31 if (!sub_mix) {
902 ✗ ret = AVERROR(ENOMEM);
903 ✗ goto fail;
904 }
905
906 31 nb_elements = ffio_read_leb(pbc);
907
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 64 for (int j = 0; j < nb_elements; j++) {
908 AVIAMFSubmixElement *submix_element;
909 33 IAMFAudioElement *audio_element = NULL;
910 unsigned int rendering_config_extension_size;
911
912 33 submix_element = av_iamf_submix_add_element(sub_mix);
913
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 33 if (!submix_element) {
914 ✗ ret = AVERROR(ENOMEM);
915 ✗ goto fail;
916 }
917
918 33 submix_element->audio_element_id = ffio_read_leb(pbc);
919
920
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 35 for (int k = 0; k < c->nb_audio_elements; k++)
921
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 35 if (c->audio_elements[k]->audio_element_id == submix_element->audio_element_id) {
922 33 audio_element = c->audio_elements[k];
923 33 break;
924 }
925
926
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 33 if (!audio_element) {
927 ✗ av_log(s, AV_LOG_ERROR, "Invalid Audio Element with id %u referenced by Mix Parameters %u\n",
928 submix_element->audio_element_id, mix_presentation_id);
929 ✗ ret = AVERROR_INVALIDDATA;
930 ✗ goto fail;
931 }
932
933
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 66 for (int k = 0; k < mix_presentation->count_label; k++) {
934 33 char *annotation = NULL;
935 33 ret = label_string(pbc, &annotation);
936
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 33 if (ret < 0)
937 ✗ goto fail;
938 33 ret = av_dict_set(&submix_element->annotations, mix_presentation->language_label[k], annotation,
939 AV_DICT_DONT_STRDUP_VAL | AV_DICT_DONT_OVERWRITE);
940
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 33 if (ret < 0)
941 ✗ goto fail;
942 }
943
944 33 submix_element->headphones_rendering_mode = avio_r8(pbc) >> 6;
945
946 33 rendering_config_extension_size = ffio_read_leb(pbc);
947 33 avio_skip(pbc, rendering_config_extension_size);
948
949 33 ret = param_parse(s, c, pbc, AV_IAMF_PARAMETER_DEFINITION_MIX_GAIN,
950 NULL,
951 &submix_element->element_mix_config);
952
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 33 if (ret < 0)
953 ✗ goto fail;
954 33 submix_element->default_mix_gain = av_make_q(sign_extend(avio_rb16(pbc), 16), 1 << 8);
955 }
956
957 31 ret = param_parse(s, c, pbc, AV_IAMF_PARAMETER_DEFINITION_MIX_GAIN, NULL, &sub_mix->output_mix_config);
958
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 31 if (ret < 0)
959 ✗ goto fail;
960 31 sub_mix->default_mix_gain = av_make_q(sign_extend(avio_rb16(pbc), 16), 1 << 8);
961
962 31 nb_layouts = ffio_read_leb(pbc);
963
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 99 for (int j = 0; j < nb_layouts; j++) {
964 AVIAMFSubmixLayout *submix_layout;
965 int info_type;
966 68 int byte = avio_r8(pbc);
967
968 68 submix_layout = av_iamf_submix_add_layout(sub_mix);
969
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 68 if (!submix_layout) {
970 ✗ ret = AVERROR(ENOMEM);
971 ✗ goto fail;
972 }
973
974 68 submix_layout->layout_type = byte >> 6;
975
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 68 if (submix_layout->layout_type < AV_IAMF_SUBMIX_LAYOUT_TYPE_LOUDSPEAKERS ||
976
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 68 submix_layout->layout_type > AV_IAMF_SUBMIX_LAYOUT_TYPE_BINAURAL) {
977 ✗ av_log(s, AV_LOG_ERROR, "Invalid Layout type %u in a submix from Mix Presentation %u\n",
978 ✗ submix_layout->layout_type, mix_presentation_id);
979 ✗ ret = AVERROR_INVALIDDATA;
980 ✗ goto fail;
981 }
982
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 68 if (submix_layout->layout_type == 2) {
983 int sound_system;
984 64 sound_system = (byte >> 2) & 0xF;
985
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 64 if (sound_system >= FF_ARRAY_ELEMS(ff_iamf_sound_system_map)) {
986 ✗ ret = AVERROR_INVALIDDATA;
987 ✗ goto fail;
988 }
989 64 av_channel_layout_copy(&submix_layout->sound_system, &ff_iamf_sound_system_map[sound_system].layout);
990 } else
991 4 submix_layout->sound_system = (AVChannelLayout)AV_CHANNEL_LAYOUT_BINAURAL;
992
993 68 info_type = avio_r8(pbc);
994 68 submix_layout->integrated_loudness = av_make_q(sign_extend(avio_rb16(pbc), 16), 1 << 8);
995 68 submix_layout->digital_peak = av_make_q(sign_extend(avio_rb16(pbc), 16), 1 << 8);
996
997
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 68 if (info_type & 1)
998 ✗ submix_layout->true_peak = av_make_q(sign_extend(avio_rb16(pbc), 16), 1 << 8);
999
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 68 if (info_type & 2) {
1000 ✗ unsigned int num_anchored_loudness = avio_r8(pbc);
1001
1002 ✗ for (int k = 0; k < num_anchored_loudness; k++) {
1003 ✗ unsigned int anchor_element = avio_r8(pbc);
1004 ✗ AVRational anchored_loudness = av_make_q(sign_extend(avio_rb16(pbc), 16), 1 << 8);
1005 ✗ if (anchor_element == IAMF_ANCHOR_ELEMENT_DIALOGUE)
1006 ✗ submix_layout->dialogue_anchored_loudness = anchored_loudness;
1007 ✗ else if (anchor_element <= IAMF_ANCHOR_ELEMENT_ALBUM)
1008 ✗ submix_layout->album_anchored_loudness = anchored_loudness;
1009 else
1010 ✗ av_log(s, AV_LOG_DEBUG, "Unknown anchor_element. Ignoring\n");
1011 }
1012 }
1013
1014
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 68 if (info_type & 0xFC) {
1015 ✗ unsigned int info_type_size = ffio_read_leb(pbc);
1016 ✗ avio_skip(pbc, info_type_size);
1017 }
1018 }
1019 }
1020
1021 27 c->mix_presentations[c->nb_mix_presentations++] = mix_presentation;
1022
1023 27 len -= avio_tell(pbc);
1024
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 27 if (len)
1025 ✗ av_log(s, AV_LOG_WARNING, "Underread in mix_presentation_obu. %d bytes left at the end\n", len);
1026
1027 27 ret = 0;
1028 27 fail:
1029 27 av_free(buf);
1030
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 27 if (ret < 0)
1031 ✗ ff_iamf_free_mix_presentation(&mix_presentation);
1032 27 return ret;
1033 }
1034
1035 8179 int ff_iamf_parse_obu_header(const uint8_t *buf, int buf_size,
1036 unsigned *obu_size, int *start_pos, enum IAMF_OBU_Type *type,
1037 unsigned *skip_samples, unsigned *discard_padding)
1038 {
1039 GetBitContext gb;
1040 int ret, extension_flag, trimming, start;
1041 8179 unsigned skip = 0, discard = 0;
1042 unsigned size;
1043
1044 8179 ret = init_get_bits8(&gb, buf, FFMIN(buf_size, MAX_IAMF_OBU_HEADER_SIZE));
1045
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 8179 if (ret < 0)
1046 ✗ return ret;
1047
1048 8179 *type = get_bits(&gb, 5);
1049 8179 /*redundant =*/ get_bits1(&gb);
1050 8179 trimming = get_bits1(&gb);
1051 8179 extension_flag = get_bits1(&gb);
1052
1053 8179 *obu_size = get_leb(&gb);
1054
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 8179 if (*obu_size > INT_MAX)
1055 9 return AVERROR_INVALIDDATA;
1056
1057 8170 start = get_bits_count(&gb) / 8;
1058
1059
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 8170 if (trimming) {
1060 2334 discard = get_leb(&gb); // num_samples_to_trim_at_end
1061 2334 skip = get_leb(&gb); // num_samples_to_trim_at_start
1062 }
1063
1064
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 8170 if (skip_samples)
1065 783 *skip_samples = skip;
1066
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 8170 if (discard_padding)
1067 783 *discard_padding = discard;
1068
1069
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 8170 if (extension_flag) {
1070 unsigned int extension_bytes;
1071 728 extension_bytes = get_leb(&gb);
1072
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 728 if (extension_bytes > INT_MAX / 8)
1073 18 return AVERROR_INVALIDDATA;
1074 710 skip_bits_long(&gb, extension_bytes * 8);
1075 }
1076
1077
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 8152 if (get_bits_left(&gb) < 0)
1078 529 return AVERROR_INVALIDDATA;
1079
1080 7623 size = *obu_size + start;
1081
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 7623 if (size > INT_MAX)
1082 ✗ return AVERROR_INVALIDDATA;
1083
1084 7623 *obu_size -= get_bits_count(&gb) / 8 - start;
1085 7623 *start_pos = size - *obu_size;
1086
1087 7623 return size;
1088 }
1089
1090 27 int ff_iamfdec_read_descriptors(IAMFContext *c, AVIOContext *pb,
1091 int max_size, void *log_ctx)
1092 {
1093 uint8_t header[MAX_IAMF_OBU_HEADER_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
1094 int ret;
1095
1096 100 while (1) {
1097 unsigned obu_size;
1098 enum IAMF_OBU_Type type;
1099 int start_pos, len, size;
1100
1101
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 127 if ((ret = ffio_ensure_seekback(pb, FFMIN(MAX_IAMF_OBU_HEADER_SIZE, max_size))) < 0)
1102 ✗ return ret;
1103 127 size = avio_read(pb, header, FFMIN(MAX_IAMF_OBU_HEADER_SIZE, max_size));
1104
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 127 if (size < 0)
1105 ✗ return size;
1106 127 memset(header + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1107
1108 127 len = ff_iamf_parse_obu_header(header, size, &obu_size, &start_pos, &type, NULL, NULL);
1109
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 127 if (len < 0 || obu_size > max_size) {
1110 ✗ av_log(log_ctx, AV_LOG_ERROR, "Failed to read obu header\n");
1111 ✗ avio_seek(pb, -size, SEEK_CUR);
1112 ✗ return len;
1113 }
1114
1115
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 127 if (type >= IAMF_OBU_IA_PARAMETER_BLOCK && type < IAMF_OBU_IA_SEQUENCE_HEADER) {
1116 17 avio_seek(pb, -size, SEEK_CUR);
1117 17 break;
1118 }
1119
1120 110 avio_seek(pb, -(size - start_pos), SEEK_CUR);
1121
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 110 switch (type) {
1122 27 case IAMF_OBU_IA_CODEC_CONFIG:
1123 27 ret = codec_config_obu(log_ctx, c, pb, obu_size);
1124 27 break;
1125 29 case IAMF_OBU_IA_AUDIO_ELEMENT:
1126 29 ret = audio_element_obu(log_ctx, c, pb, obu_size);
1127 29 break;
1128 27 case IAMF_OBU_IA_MIX_PRESENTATION:
1129 27 ret = mix_presentation_obu(log_ctx, c, pb, obu_size);
1130 27 break;
1131 27 default: {
1132 27 int64_t offset = avio_skip(pb, obu_size);
1133
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 27 if (offset < 0)
1134 ✗ ret = offset;
1135 27 break;
1136 }
1137 }
1138
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 110 if (ret < 0) {
1139 ✗ av_log(log_ctx, AV_LOG_ERROR, "Failed to read obu type %d\n", type);
1140 ✗ return ret;
1141 }
1142 110 max_size -= obu_size + start_pos;
1143
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 110 if (max_size < 0)
1144 ✗ return AVERROR_INVALIDDATA;
1145
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 110 if (!max_size)
1146 10 break;
1147 }
1148
1149 27 return 0;
1150 }
1151