| 1 | /* |
| 2 | * Sony OpenMG (OMA) demuxer |
| 3 | * |
| 4 | * Copyright (c) 2008, 2013 Maxim Poliakovski |
| 5 | * 2008 Benjamin Larsson |
| 6 | * 2011 David Goldwich |
| 7 | * |
| 8 | * This file is part of FFmpeg. |
| 9 | * |
| 10 | * FFmpeg is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU Lesser General Public |
| 12 | * License as published by the Free Software Foundation; either |
| 13 | * version 2.1 of the License, or (at your option) any later version. |
| 14 | * |
| 15 | * FFmpeg is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 18 | * Lesser General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU Lesser General Public |
| 21 | * License along with FFmpeg; if not, write to the Free Software |
| 22 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 23 | */ |
| 24 | |
| 25 | /** |
| 26 | * @file |
| 27 | * This is a demuxer for Sony OpenMG Music files |
| 28 | * |
| 29 | * Known file extensions: ".oma", "aa3" |
| 30 | * The format of such files consists of three parts: |
| 31 | * - "ea3" header carrying overall info and metadata. Except for starting with |
| 32 | * "ea" instead of "ID", it's an ID3v2 header. |
| 33 | * - "EA3" header is a Sony-specific header containing information about |
| 34 | * the OpenMG file: codec type (usually ATRAC, can also be MP3 or WMA), |
| 35 | * codec specific info (packet size, sample rate, channels and so on) |
| 36 | * and DRM related info (file encryption, content id). |
| 37 | * - Sound data organized in packets follow the EA3 header |
| 38 | * (can be encrypted using the Sony DRM!). |
| 39 | * |
| 40 | * Supported decoders: ATRAC3, ATRAC3+, MP3, LPCM |
| 41 | */ |
| 42 | |
| 43 | #include <inttypes.h> |
| 44 | |
| 45 | #include "libavutil/channel_layout.h" |
| 46 | #include "avformat.h" |
| 47 | #include "internal.h" |
| 48 | #include "libavutil/intreadwrite.h" |
| 49 | #include "libavutil/des.h" |
| 50 | #include "oma.h" |
| 51 | #include "pcm.h" |
| 52 | #include "id3v2.h" |
| 53 | |
| 54 | |
| 55 | static const uint64_t leaf_table[] = { |
| 56 | 0xd79e8283acea4620, 0x7a9762f445afd0d8, |
| 57 | 0x354d60a60b8c79f1, 0x584e1cde00b07aee, |
| 58 | 0x1573cd93da7df623, 0x47f98d79620dd535 |
| 59 | }; |
| 60 | |
| 61 | typedef struct OMAContext { |
| 62 | uint64_t content_start; |
| 63 | int encrypted; |
| 64 | uint16_t k_size; |
| 65 | uint16_t e_size; |
| 66 | uint16_t i_size; |
| 67 | uint16_t s_size; |
| 68 | uint32_t rid; |
| 69 | uint8_t r_val[24]; |
| 70 | uint8_t n_val[24]; |
| 71 | uint8_t m_val[8]; |
| 72 | uint8_t s_val[8]; |
| 73 | uint8_t sm_val[8]; |
| 74 | uint8_t e_val[8]; |
| 75 | uint8_t iv[8]; |
| 76 | struct AVDES av_des; |
| 77 | } OMAContext; |
| 78 | |
| 79 | static void hex_log(AVFormatContext *s, int level, |
| 80 | const char *name, const uint8_t *value, int len) |
| 81 | { |
| 82 | char buf[33]; |
| 83 | len = FFMIN(len, 16); |
| 84 | if (av_log_get_level() < level) |
| 85 | return; |
| 86 | ff_data_to_hex(buf, value, len, 1); |
| 87 | buf[len << 1] = '\0'; |
| 88 | av_log(s, level, "%s: %s\n", name, buf); |
| 89 | } |
| 90 | |
| 91 | static int kset(AVFormatContext *s, const uint8_t *r_val, const uint8_t *n_val, |
| 92 | int len) |
| 93 | { |
| 94 | OMAContext *oc = s->priv_data; |
| 95 | |
| 96 | if (!r_val && !n_val) |
| 97 | return -1; |
| 98 | |
| 99 | len = FFMIN(len, 16); |
| 100 | |
| 101 | /* use first 64 bits in the third round again */ |
| 102 | if (r_val) { |
| 103 | if (r_val != oc->r_val) { |
| 104 | memset(oc->r_val, 0, 24); |
| 105 | memcpy(oc->r_val, r_val, len); |
| 106 | } |
| 107 | memcpy(&oc->r_val[16], r_val, 8); |
| 108 | } |
| 109 | if (n_val) { |
| 110 | if (n_val != oc->n_val) { |
| 111 | memset(oc->n_val, 0, 24); |
| 112 | memcpy(oc->n_val, n_val, len); |
| 113 | } |
| 114 | memcpy(&oc->n_val[16], n_val, 8); |
| 115 | } |
| 116 | |
| 117 | return 0; |
| 118 | } |
| 119 | |
| 120 | #define OMA_RPROBE_M_VAL 48 + 1 |
| 121 | |
| 122 | static int rprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size, |
| 123 | const uint8_t *r_val) |
| 124 | { |
| 125 | OMAContext *oc = s->priv_data; |
| 126 | unsigned int pos; |
| 127 | struct AVDES av_des; |
| 128 | |
| 129 | if (!enc_header || !r_val || |
| 130 | size < OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size || |
| 131 | size < OMA_RPROBE_M_VAL) |
| 132 | return -1; |
| 133 | |
| 134 | /* m_val */ |
| 135 | av_des_init(&av_des, r_val, 192, 1); |
| 136 | av_des_crypt(&av_des, oc->m_val, &enc_header[48], 1, NULL, 1); |
| 137 | |
| 138 | /* s_val */ |
| 139 | av_des_init(&av_des, oc->m_val, 64, 0); |
| 140 | av_des_crypt(&av_des, oc->s_val, NULL, 1, NULL, 0); |
| 141 | |
| 142 | /* sm_val */ |
| 143 | pos = OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size; |
| 144 | av_des_init(&av_des, oc->s_val, 64, 0); |
| 145 | av_des_mac(&av_des, oc->sm_val, &enc_header[pos], (oc->i_size >> 3)); |
| 146 | |
| 147 | pos += oc->i_size; |
| 148 | |
| 149 | return memcmp(&enc_header[pos], oc->sm_val, 8) ? -1 : 0; |
| 150 | } |
| 151 | |
| 152 | static int nprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size, |
| 153 | const uint8_t *n_val) |
| 154 | { |
| 155 | OMAContext *oc = s->priv_data; |
| 156 | uint64_t pos; |
| 157 | uint32_t taglen, datalen; |
| 158 | struct AVDES av_des; |
| 159 | |
| 160 | if (!enc_header || !n_val || |
| 161 | size < OMA_ENC_HEADER_SIZE + oc->k_size + 4) |
| 162 | return -1; |
| 163 | |
| 164 | pos = OMA_ENC_HEADER_SIZE + oc->k_size; |
| 165 | if (!memcmp(&enc_header[pos], "EKB ", 4)) |
| 166 | pos += 32; |
| 167 | |
| 168 | if (size < pos + 44) |
| 169 | return -1; |
| 170 | |
| 171 | if (AV_RB32(&enc_header[pos]) != oc->rid) |
| 172 | av_log(s, AV_LOG_DEBUG, "Mismatching RID\n"); |
| 173 | |
| 174 | taglen = AV_RB32(&enc_header[pos + 32]); |
| 175 | datalen = AV_RB32(&enc_header[pos + 36]) >> 4; |
| 176 | |
| 177 | pos += 44L + taglen; |
| 178 | |
| 179 | if (pos + (((uint64_t)datalen) << 4) > size) |
| 180 | return -1; |
| 181 | |
| 182 | av_des_init(&av_des, n_val, 192, 1); |
| 183 | while (datalen-- > 0) { |
| 184 | av_des_crypt(&av_des, oc->r_val, &enc_header[pos], 2, NULL, 1); |
| 185 | kset(s, oc->r_val, NULL, 16); |
| 186 | if (!rprobe(s, enc_header, size, oc->r_val)) |
| 187 | return 0; |
| 188 | pos += 16; |
| 189 | } |
| 190 | |
| 191 | return -1; |
| 192 | } |
| 193 | |
| 194 | static int decrypt_init(AVFormatContext *s, ID3v2ExtraMeta *em, uint8_t *header) |
| 195 | { |
| 196 | OMAContext *oc = s->priv_data; |
| 197 | ID3v2ExtraMetaGEOB *geob = NULL; |
| 198 | uint8_t *gdata; |
| 199 | |
| 200 | oc->encrypted = 1; |
| 201 | av_log(s, AV_LOG_INFO, "File is encrypted\n"); |
| 202 | |
| 203 | /* find GEOB metadata */ |
| 204 | while (em) { |
| 205 | if (!strcmp(em->tag, "GEOB") && |
| 206 | (geob = em->data) && |
| 207 | (!strcmp(geob->description, "OMG_LSI") || |
| 208 | !strcmp(geob->description, "OMG_BKLSI"))) { |
| 209 | break; |
| 210 | } |
| 211 | em = em->next; |
| 212 | } |
| 213 | if (!em) { |
| 214 | av_log(s, AV_LOG_ERROR, "No encryption header found\n"); |
| 215 | return AVERROR_INVALIDDATA; |
| 216 | } |
| 217 | |
| 218 | if (geob->datasize < 64) { |
| 219 | av_log(s, AV_LOG_ERROR, |
| 220 | "Invalid GEOB data size: %"PRIu32"\n", geob->datasize); |
| 221 | return AVERROR_INVALIDDATA; |
| 222 | } |
| 223 | |
| 224 | gdata = geob->data; |
| 225 | |
| 226 | if (AV_RB16(gdata) != 1) |
| 227 | av_log(s, AV_LOG_WARNING, "Unknown version in encryption header\n"); |
| 228 | |
| 229 | oc->k_size = AV_RB16(&gdata[2]); |
| 230 | oc->e_size = AV_RB16(&gdata[4]); |
| 231 | oc->i_size = AV_RB16(&gdata[6]); |
| 232 | oc->s_size = AV_RB16(&gdata[8]); |
| 233 | |
| 234 | if (memcmp(&gdata[OMA_ENC_HEADER_SIZE], "KEYRING ", 12)) { |
| 235 | av_log(s, AV_LOG_ERROR, "Invalid encryption header\n"); |
| 236 | return AVERROR_INVALIDDATA; |
| 237 | } |
| 238 | if (OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size + 8 > geob->datasize || |
| 239 | OMA_ENC_HEADER_SIZE + 48 > geob->datasize) { |
| 240 | av_log(s, AV_LOG_ERROR, "Too little GEOB data\n"); |
| 241 | return AVERROR_INVALIDDATA; |
| 242 | } |
| 243 | oc->rid = AV_RB32(&gdata[OMA_ENC_HEADER_SIZE + 28]); |
| 244 | av_log(s, AV_LOG_DEBUG, "RID: %.8"PRIx32"\n", oc->rid); |
| 245 | |
| 246 | memcpy(oc->iv, &header[0x58], 8); |
| 247 | hex_log(s, AV_LOG_DEBUG, "IV", oc->iv, 8); |
| 248 | |
| 249 | hex_log(s, AV_LOG_DEBUG, "CBC-MAC", |
| 250 | &gdata[OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size], |
| 251 | 8); |
| 252 | |
| 253 | if (s->keylen > 0) { |
| 254 | kset(s, s->key, s->key, s->keylen); |
| 255 | } |
| 256 | if (!memcmp(oc->r_val, (const uint8_t[8]){0}, 8) || |
| 257 | rprobe(s, gdata, geob->datasize, oc->r_val) < 0 && |
| 258 | nprobe(s, gdata, geob->datasize, oc->n_val) < 0) { |
| 259 | int i; |
| 260 | for (i = 0; i < FF_ARRAY_ELEMS(leaf_table); i += 2) { |
| 261 | uint8_t buf[16]; |
| 262 | AV_WL64(buf, leaf_table[i]); |
| 263 | AV_WL64(&buf[8], leaf_table[i + 1]); |
| 264 | kset(s, buf, buf, 16); |
| 265 | if (!rprobe(s, gdata, geob->datasize, oc->r_val) || |
| 266 | !nprobe(s, gdata, geob->datasize, oc->n_val)) |
| 267 | break; |
| 268 | } |
| 269 | if (i >= FF_ARRAY_ELEMS(leaf_table)) { |
| 270 | av_log(s, AV_LOG_ERROR, "Invalid key\n"); |
| 271 | return AVERROR_INVALIDDATA; |
| 272 | } |
| 273 | } |
| 274 | |
| 275 | /* e_val */ |
| 276 | av_des_init(&oc->av_des, oc->m_val, 64, 0); |
| 277 | av_des_crypt(&oc->av_des, oc->e_val, |
| 278 | &gdata[OMA_ENC_HEADER_SIZE + 40], 1, NULL, 0); |
| 279 | hex_log(s, AV_LOG_DEBUG, "EK", oc->e_val, 8); |
| 280 | |
| 281 | /* init e_val */ |
| 282 | av_des_init(&oc->av_des, oc->e_val, 64, 1); |
| 283 | |
| 284 | return 0; |
| 285 | } |
| 286 | |
| 287 | static int oma_read_header(AVFormatContext *s) |
| 288 | { |
| 289 | int ret, framesize, jsflag, samplerate; |
| 290 | uint32_t codec_params, channel_id; |
| 291 | int16_t eid; |
| 292 | uint8_t buf[EA3_HEADER_SIZE]; |
| 293 | uint8_t *edata; |
| 294 | AVStream *st; |
| 295 | ID3v2ExtraMeta *extra_meta = NULL; |
| 296 | OMAContext *oc = s->priv_data; |
| 297 | |
| 298 | ff_id3v2_read(s, ID3v2_EA3_MAGIC, &extra_meta, 0); |
| 299 | ret = avio_read(s->pb, buf, EA3_HEADER_SIZE); |
| 300 | if (ret < EA3_HEADER_SIZE) |
| 301 | return -1; |
| 302 | |
| 303 | if (memcmp(buf, ((const uint8_t[]){'E', 'A', '3'}), 3) || |
| 304 | buf[4] != 0 || buf[5] != EA3_HEADER_SIZE) { |
| 305 | av_log(s, AV_LOG_ERROR, "Couldn't find the EA3 header !\n"); |
| 306 | return AVERROR_INVALIDDATA; |
| 307 | } |
| 308 | |
| 309 | oc->content_start = avio_tell(s->pb); |
| 310 | |
| 311 | /* encrypted file */ |
| 312 | eid = AV_RB16(&buf[6]); |
| 313 | if (eid != -1 && eid != -128 && decrypt_init(s, extra_meta, buf) < 0) { |
| 314 | ff_id3v2_free_extra_meta(&extra_meta); |
| 315 | return -1; |
| 316 | } |
| 317 | |
| 318 | ff_id3v2_free_extra_meta(&extra_meta); |
| 319 | |
| 320 | codec_params = AV_RB24(&buf[33]); |
| 321 | |
| 322 | st = avformat_new_stream(s, NULL); |
| 323 | if (!st) |
| 324 | return AVERROR(ENOMEM); |
| 325 | |
| 326 | st->start_time = 0; |
| 327 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
| 328 | st->codec->codec_tag = buf[32]; |
| 329 | st->codec->codec_id = ff_codec_get_id(ff_oma_codec_tags, |
| 330 | st->codec->codec_tag); |
| 331 | |
| 332 | switch (buf[32]) { |
| 333 | case OMA_CODECID_ATRAC3: |
| 334 | samplerate = ff_oma_srate_tab[(codec_params >> 13) & 7] * 100; |
| 335 | if (!samplerate) { |
| 336 | av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n"); |
| 337 | return AVERROR_INVALIDDATA; |
| 338 | } |
| 339 | if (samplerate != 44100) |
| 340 | avpriv_request_sample(s, "Sample rate %d", samplerate); |
| 341 | |
| 342 | framesize = (codec_params & 0x3FF) * 8; |
| 343 | |
| 344 | /* get stereo coding mode, 1 for joint-stereo */ |
| 345 | jsflag = (codec_params >> 17) & 1; |
| 346 | |
| 347 | st->codec->channels = 2; |
| 348 | st->codec->channel_layout = AV_CH_LAYOUT_STEREO; |
| 349 | st->codec->sample_rate = samplerate; |
| 350 | st->codec->bit_rate = st->codec->sample_rate * framesize * 8 / 1024; |
| 351 | |
| 352 | /* fake the ATRAC3 extradata |
| 353 | * (wav format, makes stream copy to wav work) */ |
| 354 | if (ff_alloc_extradata(st->codec, 14)) |
| 355 | return AVERROR(ENOMEM); |
| 356 | |
| 357 | edata = st->codec->extradata; |
| 358 | AV_WL16(&edata[0], 1); // always 1 |
| 359 | AV_WL32(&edata[2], samplerate); // samples rate |
| 360 | AV_WL16(&edata[6], jsflag); // coding mode |
| 361 | AV_WL16(&edata[8], jsflag); // coding mode |
| 362 | AV_WL16(&edata[10], 1); // always 1 |
| 363 | // AV_WL16(&edata[12], 0); // always 0 |
| 364 | |
| 365 | avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); |
| 366 | break; |
| 367 | case OMA_CODECID_ATRAC3P: |
| 368 | channel_id = (codec_params >> 10) & 7; |
| 369 | if (!channel_id) { |
| 370 | av_log(s, AV_LOG_ERROR, |
| 371 | "Invalid ATRAC-X channel id: %"PRIu32"\n", channel_id); |
| 372 | return AVERROR_INVALIDDATA; |
| 373 | } |
| 374 | st->codec->channel_layout = ff_oma_chid_to_native_layout[channel_id - 1]; |
| 375 | st->codec->channels = ff_oma_chid_to_num_channels[channel_id - 1]; |
| 376 | framesize = ((codec_params & 0x3FF) * 8) + 8; |
| 377 | samplerate = ff_oma_srate_tab[(codec_params >> 13) & 7] * 100; |
| 378 | if (!samplerate) { |
| 379 | av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n"); |
| 380 | return AVERROR_INVALIDDATA; |
| 381 | } |
| 382 | st->codec->sample_rate = samplerate; |
| 383 | st->codec->bit_rate = samplerate * framesize * 8 / 2048; |
| 384 | avpriv_set_pts_info(st, 64, 1, samplerate); |
| 385 | break; |
| 386 | case OMA_CODECID_MP3: |
| 387 | st->need_parsing = AVSTREAM_PARSE_FULL_RAW; |
| 388 | framesize = 1024; |
| 389 | break; |
| 390 | case OMA_CODECID_LPCM: |
| 391 | /* PCM 44.1 kHz 16 bit stereo big-endian */ |
| 392 | st->codec->channels = 2; |
| 393 | st->codec->channel_layout = AV_CH_LAYOUT_STEREO; |
| 394 | st->codec->sample_rate = 44100; |
| 395 | framesize = 1024; |
| 396 | /* bit rate = sample rate x PCM block align (= 4) x 8 */ |
| 397 | st->codec->bit_rate = st->codec->sample_rate * 32; |
| 398 | st->codec->bits_per_coded_sample = |
| 399 | av_get_bits_per_sample(st->codec->codec_id); |
| 400 | avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); |
| 401 | break; |
| 402 | default: |
| 403 | av_log(s, AV_LOG_ERROR, "Unsupported codec %d!\n", buf[32]); |
| 404 | return AVERROR(ENOSYS); |
| 405 | } |
| 406 | |
| 407 | st->codec->block_align = framesize; |
| 408 | |
| 409 | return 0; |
| 410 | } |
| 411 | |
| 412 | |
| 413 | static int oma_read_packet(AVFormatContext *s, AVPacket *pkt) |
| 414 | { |
| 415 | OMAContext *oc = s->priv_data; |
| 416 | int packet_size = s->streams[0]->codec->block_align; |
| 417 | int ret = av_get_packet(s->pb, pkt, packet_size); |
| 418 | |
| 419 | if (ret < packet_size) |
| 420 | pkt->flags |= AV_PKT_FLAG_CORRUPT; |
| 421 | |
| 422 | if (ret < 0) |
| 423 | return ret; |
| 424 | if (!ret) |
| 425 | return AVERROR_EOF; |
| 426 | |
| 427 | pkt->stream_index = 0; |
| 428 | |
| 429 | if (oc->encrypted) { |
| 430 | /* previous unencrypted block saved in IV for |
| 431 | * the next packet (CBC mode) */ |
| 432 | if (ret == packet_size) |
| 433 | av_des_crypt(&oc->av_des, pkt->data, pkt->data, |
| 434 | (packet_size >> 3), oc->iv, 1); |
| 435 | else |
| 436 | memset(oc->iv, 0, 8); |
| 437 | } |
| 438 | |
| 439 | return ret; |
| 440 | } |
| 441 | |
| 442 | static int oma_read_probe(AVProbeData *p) |
| 443 | { |
| 444 | const uint8_t *buf = p->buf; |
| 445 | unsigned tag_len = 0; |
| 446 | |
| 447 | if (p->buf_size >= ID3v2_HEADER_SIZE && ff_id3v2_match(buf, ID3v2_EA3_MAGIC)) |
| 448 | tag_len = ff_id3v2_tag_len(buf); |
| 449 | |
| 450 | /* This check cannot overflow as tag_len has at most 28 bits */ |
| 451 | if (p->buf_size < tag_len + 5) |
| 452 | /* EA3 header comes late, might be outside of the probe buffer */ |
| 453 | return tag_len ? AVPROBE_SCORE_EXTENSION/2 : 0; |
| 454 | |
| 455 | buf += tag_len; |
| 456 | |
| 457 | if (!memcmp(buf, "EA3", 3) && !buf[4] && buf[5] == EA3_HEADER_SIZE) |
| 458 | return AVPROBE_SCORE_MAX; |
| 459 | else |
| 460 | return 0; |
| 461 | } |
| 462 | |
| 463 | static int oma_read_seek(struct AVFormatContext *s, |
| 464 | int stream_index, int64_t timestamp, int flags) |
| 465 | { |
| 466 | OMAContext *oc = s->priv_data; |
| 467 | int err = ff_pcm_read_seek(s, stream_index, timestamp, flags); |
| 468 | |
| 469 | if (!oc->encrypted) |
| 470 | return err; |
| 471 | |
| 472 | /* readjust IV for CBC */ |
| 473 | if (err || avio_tell(s->pb) < oc->content_start) |
| 474 | goto wipe; |
| 475 | if ((err = avio_seek(s->pb, -8, SEEK_CUR)) < 0) |
| 476 | goto wipe; |
| 477 | if ((err = avio_read(s->pb, oc->iv, 8)) < 8) { |
| 478 | if (err >= 0) |
| 479 | err = AVERROR_EOF; |
| 480 | goto wipe; |
| 481 | } |
| 482 | |
| 483 | return 0; |
| 484 | wipe: |
| 485 | memset(oc->iv, 0, 8); |
| 486 | return err; |
| 487 | } |
| 488 | |
| 489 | AVInputFormat ff_oma_demuxer = { |
| 490 | .name = "oma", |
| 491 | .long_name = NULL_IF_CONFIG_SMALL("Sony OpenMG audio"), |
| 492 | .priv_data_size = sizeof(OMAContext), |
| 493 | .read_probe = oma_read_probe, |
| 494 | .read_header = oma_read_header, |
| 495 | .read_packet = oma_read_packet, |
| 496 | .read_seek = oma_read_seek, |
| 497 | .flags = AVFMT_GENERIC_INDEX, |
| 498 | .extensions = "oma,omg,aa3", |
| 499 | .codec_tag = (const AVCodecTag* const []){ff_oma_codec_tags, 0}, |
| 500 | }; |