FFmpeg  4.3
omadec.c
Go to the documentation of this file.
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 
46 #include "avformat.h"
47 #include "internal.h"
48 #include "libavutil/intreadwrite.h"
49 #include "libavutil/des.h"
50 #include "libavutil/mathematics.h"
51 #include "oma.h"
52 #include "pcm.h"
53 #include "id3v2.h"
54 
55 
56 static const uint64_t leaf_table[] = {
57  0xd79e8283acea4620, 0x7a9762f445afd0d8,
58  0x354d60a60b8c79f1, 0x584e1cde00b07aee,
59  0x1573cd93da7df623, 0x47f98d79620dd535
60 };
61 
62 typedef struct OMAContext {
63  uint64_t content_start;
64  int encrypted;
65  uint16_t k_size;
66  uint16_t e_size;
67  uint16_t i_size;
68  uint16_t s_size;
69  uint32_t rid;
76  uint8_t iv[8];
77  struct AVDES *av_des;
78 
80 } OMAContext;
81 
83 {
84  OMAContext *oc = s->priv_data;
85  av_freep(&oc->av_des);
86  return 0;
87 }
88 
89 static void hex_log(AVFormatContext *s, int level,
90  const char *name, const uint8_t *value, int len)
91 {
92  char buf[33];
93  len = FFMIN(len, 16);
94  if (av_log_get_level() < level)
95  return;
96  ff_data_to_hex(buf, value, len, 1);
97  buf[len << 1] = '\0';
98  av_log(s, level, "%s: %s\n", name, buf);
99 }
100 
101 static int kset(AVFormatContext *s, const uint8_t *r_val, const uint8_t *n_val,
102  int len)
103 {
104  OMAContext *oc = s->priv_data;
105 
106  if (!r_val && !n_val)
107  return -1;
108 
109  len = FFMIN(len, 16);
110 
111  /* use first 64 bits in the third round again */
112  if (r_val) {
113  if (r_val != oc->r_val) {
114  memset(oc->r_val, 0, 24);
115  memcpy(oc->r_val, r_val, len);
116  }
117  memcpy(&oc->r_val[16], r_val, 8);
118  }
119  if (n_val) {
120  if (n_val != oc->n_val) {
121  memset(oc->n_val, 0, 24);
122  memcpy(oc->n_val, n_val, len);
123  }
124  memcpy(&oc->n_val[16], n_val, 8);
125  }
126 
127  return 0;
128 }
129 
130 #define OMA_RPROBE_M_VAL 48 + 1
131 
132 static int rprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size,
133  const uint8_t *r_val)
134 {
135  OMAContext *oc = s->priv_data;
136  unsigned int pos;
137  struct AVDES *av_des;
138 
139  if (!enc_header || !r_val ||
140  size < OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size ||
141  size < OMA_RPROBE_M_VAL)
142  return -1;
143 
144  av_des = av_des_alloc();
145  if (!av_des)
146  return AVERROR(ENOMEM);
147 
148  /* m_val */
149  av_des_init(av_des, r_val, 192, 1);
150  av_des_crypt(av_des, oc->m_val, &enc_header[48], 1, NULL, 1);
151 
152  /* s_val */
153  av_des_init(av_des, oc->m_val, 64, 0);
154  av_des_crypt(av_des, oc->s_val, NULL, 1, NULL, 0);
155 
156  /* sm_val */
157  pos = OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size;
158  av_des_init(av_des, oc->s_val, 64, 0);
159  av_des_mac(av_des, oc->sm_val, &enc_header[pos], (oc->i_size >> 3));
160 
161  pos += oc->i_size;
162 
163  av_free(av_des);
164 
165  return memcmp(&enc_header[pos], oc->sm_val, 8) ? -1 : 0;
166 }
167 
168 static int nprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size,
169  const uint8_t *n_val)
170 {
171  OMAContext *oc = s->priv_data;
172  uint64_t pos;
173  uint32_t taglen, datalen;
174  struct AVDES *av_des;
175 
176  if (!enc_header || !n_val ||
177  size < OMA_ENC_HEADER_SIZE + oc->k_size + 4)
178  return -1;
179 
180  pos = OMA_ENC_HEADER_SIZE + oc->k_size;
181  if (!memcmp(&enc_header[pos], "EKB ", 4))
182  pos += 32;
183 
184  if (size < pos + 44)
185  return -1;
186 
187  if (AV_RB32(&enc_header[pos]) != oc->rid)
188  av_log(s, AV_LOG_DEBUG, "Mismatching RID\n");
189 
190  taglen = AV_RB32(&enc_header[pos + 32]);
191  datalen = AV_RB32(&enc_header[pos + 36]) >> 4;
192 
193  pos += 44LL + taglen;
194 
195  if (pos + (((uint64_t)datalen) << 4) > size)
196  return -1;
197 
198  av_des = av_des_alloc();
199  if (!av_des)
200  return AVERROR(ENOMEM);
201 
202  av_des_init(av_des, n_val, 192, 1);
203  while (datalen-- > 0) {
204  av_des_crypt(av_des, oc->r_val, &enc_header[pos], 2, NULL, 1);
205  kset(s, oc->r_val, NULL, 16);
206  if (!rprobe(s, enc_header, size, oc->r_val)) {
207  av_free(av_des);
208  return 0;
209  }
210  pos += 16;
211  }
212 
213  av_free(av_des);
214  return -1;
215 }
216 
218 {
219  OMAContext *oc = s->priv_data;
220  ID3v2ExtraMetaGEOB *geob = NULL;
221  uint8_t *gdata;
222 
223  oc->encrypted = 1;
224  av_log(s, AV_LOG_INFO, "File is encrypted\n");
225 
226  /* find GEOB metadata */
227  for (; em; em = em->next) {
228  if (strcmp(em->tag, "GEOB"))
229  continue;
230  geob = &em->data.geob;
231  if (!strcmp(geob->description, "OMG_LSI") ||
232  !strcmp(geob->description, "OMG_BKLSI"))
233  break;
234  }
235  if (!em) {
236  av_log(s, AV_LOG_ERROR, "No encryption header found\n");
237  return AVERROR_INVALIDDATA;
238  }
239 
240  if (geob->datasize < 64) {
241  av_log(s, AV_LOG_ERROR,
242  "Invalid GEOB data size: %"PRIu32"\n", geob->datasize);
243  return AVERROR_INVALIDDATA;
244  }
245 
246  gdata = geob->data;
247 
248  if (AV_RB16(gdata) != 1)
249  av_log(s, AV_LOG_WARNING, "Unknown version in encryption header\n");
250 
251  oc->k_size = AV_RB16(&gdata[2]);
252  oc->e_size = AV_RB16(&gdata[4]);
253  oc->i_size = AV_RB16(&gdata[6]);
254  oc->s_size = AV_RB16(&gdata[8]);
255 
256  if (memcmp(&gdata[OMA_ENC_HEADER_SIZE], "KEYRING ", 12)) {
257  av_log(s, AV_LOG_ERROR, "Invalid encryption header\n");
258  return AVERROR_INVALIDDATA;
259  }
260  if (OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size + 8 > geob->datasize ||
261  OMA_ENC_HEADER_SIZE + 48 > geob->datasize) {
262  av_log(s, AV_LOG_ERROR, "Too little GEOB data\n");
263  return AVERROR_INVALIDDATA;
264  }
265  oc->rid = AV_RB32(&gdata[OMA_ENC_HEADER_SIZE + 28]);
266  av_log(s, AV_LOG_DEBUG, "RID: %.8"PRIx32"\n", oc->rid);
267 
268  memcpy(oc->iv, &header[0x58], 8);
269  hex_log(s, AV_LOG_DEBUG, "IV", oc->iv, 8);
270 
271  hex_log(s, AV_LOG_DEBUG, "CBC-MAC",
272  &gdata[OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size],
273  8);
274 
275  if (s->keylen > 0) {
276  kset(s, s->key, s->key, s->keylen);
277  }
278  if (!memcmp(oc->r_val, (const uint8_t[8]){0}, 8) ||
279  rprobe(s, gdata, geob->datasize, oc->r_val) < 0 &&
280  nprobe(s, gdata, geob->datasize, oc->n_val) < 0) {
281  int i;
282  for (i = 0; i < FF_ARRAY_ELEMS(leaf_table); i += 2) {
283  uint8_t buf[16];
284  AV_WL64(buf, leaf_table[i]);
285  AV_WL64(&buf[8], leaf_table[i + 1]);
286  kset(s, buf, buf, 16);
287  if (!rprobe(s, gdata, geob->datasize, oc->r_val) ||
288  !nprobe(s, gdata, geob->datasize, oc->n_val))
289  break;
290  }
291  if (i >= FF_ARRAY_ELEMS(leaf_table)) {
292  av_log(s, AV_LOG_ERROR, "Invalid key\n");
293  return AVERROR_INVALIDDATA;
294  }
295  }
296 
297  oc->av_des = av_des_alloc();
298  if (!oc->av_des)
299  return AVERROR(ENOMEM);
300 
301  /* e_val */
302  av_des_init(oc->av_des, oc->m_val, 64, 0);
303  av_des_crypt(oc->av_des, oc->e_val,
304  &gdata[OMA_ENC_HEADER_SIZE + 40], 1, NULL, 0);
305  hex_log(s, AV_LOG_DEBUG, "EK", oc->e_val, 8);
306 
307  /* init e_val */
308  av_des_init(oc->av_des, oc->e_val, 64, 1);
309 
310  return 0;
311 }
312 
314 {
315  OMAContext *oc = s->priv_data;
316  AVStream *st = s->streams[0];
317  int packet_size = st->codecpar->block_align;
318  int byte_rate = st->codecpar->bit_rate >> 3;
319  int64_t pos = avio_tell(s->pb);
320  int ret = av_get_packet(s->pb, pkt, packet_size);
321 
322  if (ret < packet_size)
323  pkt->flags |= AV_PKT_FLAG_CORRUPT;
324 
325  if (ret < 0)
326  return ret;
327  if (!ret)
328  return AVERROR_EOF;
329 
330  pkt->stream_index = 0;
331 
332  if (pos >= oc->content_start && byte_rate > 0) {
333  pkt->pts =
334  pkt->dts = av_rescale(pos - oc->content_start, st->time_base.den,
335  byte_rate * (int64_t)st->time_base.num);
336  }
337 
338  if (oc->encrypted) {
339  /* previous unencrypted block saved in IV for
340  * the next packet (CBC mode) */
341  if (ret == packet_size)
342  av_des_crypt(oc->av_des, pkt->data, pkt->data,
343  (packet_size >> 3), oc->iv, 1);
344  else
345  memset(oc->iv, 0, 8);
346  }
347 
348  return ret;
349 }
350 
352 {
353  int64_t pos = avio_tell(s->pb);
354  int ret, pts;
355  int packet_size;
356  unsigned tag;
357 
358  if (avio_feof(s->pb))
359  return AVERROR_EOF;
360 
361  tag = avio_rb24(s->pb);
362  if (tag == 0)
363  return AVERROR_EOF;
364  else if (tag != MKBETAG(0,'B','L','K'))
365  return AVERROR_INVALIDDATA;
366 
367  avio_skip(s->pb, 1);
368  packet_size = avio_rb16(s->pb);
369  avio_skip(s->pb, 2);
370  pts = avio_rb32(s->pb);
371  avio_skip(s->pb, 12);
372  ret = av_get_packet(s->pb, pkt, packet_size);
373  if (ret < packet_size)
374  pkt->flags |= AV_PKT_FLAG_CORRUPT;
375 
376  if (ret < 0)
377  return ret;
378  if (!ret)
379  return AVERROR_EOF;
380 
381  pkt->stream_index = 0;
382  pkt->pos = pos;
384  pkt->duration = 1024;
385  pkt->pts = pts * 1024LL;
386  } else {
387  pkt->duration = 2048;
388  pkt->pts = pts * 2048LL;
389  }
390 
391  return ret;
392 }
393 
395 {
396  int ret, framesize, jsflag, samplerate;
397  uint32_t codec_params, channel_id;
398  int16_t eid;
400  uint8_t *edata;
401  AVStream *st;
402  ID3v2ExtraMeta *extra_meta = NULL;
403  OMAContext *oc = s->priv_data;
404 
405  ff_id3v2_read(s, ID3v2_EA3_MAGIC, &extra_meta, 0);
406  if ((ret = ff_id3v2_parse_chapters(s, extra_meta)) < 0) {
407  ff_id3v2_free_extra_meta(&extra_meta);
408  return ret;
409  }
410 
411  ret = avio_read(s->pb, buf, EA3_HEADER_SIZE);
412  if (ret < EA3_HEADER_SIZE) {
413  ff_id3v2_free_extra_meta(&extra_meta);
414  return -1;
415  }
416 
417  if (memcmp(buf, ((const uint8_t[]){'E', 'A', '3'}), 3) ||
418  buf[4] != 0 || buf[5] != EA3_HEADER_SIZE) {
419  ff_id3v2_free_extra_meta(&extra_meta);
420  av_log(s, AV_LOG_ERROR, "Couldn't find the EA3 header !\n");
421  return AVERROR_INVALIDDATA;
422  }
423 
424  oc->content_start = avio_tell(s->pb);
425 
426  /* encrypted file */
427  eid = AV_RB16(&buf[6]);
428  if (eid != -1 && eid != -128 && decrypt_init(s, extra_meta, buf) < 0) {
429  ff_id3v2_free_extra_meta(&extra_meta);
430  return -1;
431  }
432 
433  ff_id3v2_free_extra_meta(&extra_meta);
434 
435  codec_params = AV_RB24(&buf[33]);
436 
437  st = avformat_new_stream(s, NULL);
438  if (!st) {
439  ret = AVERROR(ENOMEM);
440  goto fail;
441  }
442 
443  st->start_time = 0;
445  st->codecpar->codec_tag = buf[32];
447  st->codecpar->codec_tag);
448 
449  oc->read_packet = read_packet;
450 
451  switch (buf[32]) {
452  case OMA_CODECID_ATRAC3:
453  samplerate = ff_oma_srate_tab[(codec_params >> 13) & 7] * 100;
454  if (!samplerate) {
455  av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
456  ret = AVERROR_INVALIDDATA;
457  goto fail;
458  }
459  if (samplerate != 44100)
460  avpriv_request_sample(s, "Sample rate %d", samplerate);
461 
462  framesize = (codec_params & 0x3FF) * 8;
463 
464  /* get stereo coding mode, 1 for joint-stereo */
465  jsflag = (codec_params >> 17) & 1;
466 
467  st->codecpar->channels = 2;
469  st->codecpar->sample_rate = samplerate;
470  st->codecpar->bit_rate = st->codecpar->sample_rate * framesize / (1024 / 8);
471 
472  /* fake the ATRAC3 extradata
473  * (wav format, makes stream copy to wav work) */
474  if ((ret = ff_alloc_extradata(st->codecpar, 14)) < 0)
475  goto fail;
476 
477  edata = st->codecpar->extradata;
478  AV_WL16(&edata[0], 1); // always 1
479  AV_WL32(&edata[2], samplerate); // samples rate
480  AV_WL16(&edata[6], jsflag); // coding mode
481  AV_WL16(&edata[8], jsflag); // coding mode
482  AV_WL16(&edata[10], 1); // always 1
483  // AV_WL16(&edata[12], 0); // always 0
484 
485  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
486  break;
487  case OMA_CODECID_ATRAC3P:
488  channel_id = (codec_params >> 10) & 7;
489  if (!channel_id) {
490  av_log(s, AV_LOG_ERROR,
491  "Invalid ATRAC-X channel id: %"PRIu32"\n", channel_id);
492  ret = AVERROR_INVALIDDATA;
493  goto fail;
494  }
496  st->codecpar->channels = ff_oma_chid_to_num_channels[channel_id - 1];
497  framesize = ((codec_params & 0x3FF) * 8) + 8;
498  samplerate = ff_oma_srate_tab[(codec_params >> 13) & 7] * 100;
499  if (!samplerate) {
500  av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
501  ret = AVERROR_INVALIDDATA;
502  goto fail;
503  }
504  st->codecpar->sample_rate = samplerate;
505  st->codecpar->bit_rate = samplerate * framesize / (2048 / 8);
506  avpriv_set_pts_info(st, 64, 1, samplerate);
507  break;
508  case OMA_CODECID_MP3:
510  framesize = 1024;
511  break;
512  case OMA_CODECID_LPCM:
513  /* PCM 44.1 kHz 16 bit stereo big-endian */
514  st->codecpar->channels = 2;
516  st->codecpar->sample_rate = 44100;
517  framesize = 1024;
518  /* bit rate = sample rate x PCM block align (= 4) x 8 */
519  st->codecpar->bit_rate = st->codecpar->sample_rate * 32;
522  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
523  break;
525  st->codecpar->channels = 2;
527  st->codecpar->sample_rate = 44100;
528  avpriv_set_pts_info(st, 64, 1, 44100);
530  framesize = 4096;
531  break;
534  st->codecpar->channels = 2;
535  st->codecpar->sample_rate = 44100;
536  avpriv_set_pts_info(st, 64, 1, 44100);
538  framesize = 4096;
539  break;
540  default:
541  av_log(s, AV_LOG_ERROR, "Unsupported codec %d!\n", buf[32]);
542  ret = AVERROR(ENOSYS);
543  goto fail;
544  }
545 
546  st->codecpar->block_align = framesize;
547 
548  return 0;
549 fail:
550  oma_read_close(s);
551  return ret;
552 }
553 
555 {
556  OMAContext *oc = s->priv_data;
557  return oc->read_packet(s, pkt);
558 }
559 
560 static int oma_read_probe(const AVProbeData *p)
561 {
562  const uint8_t *buf = p->buf;
563  unsigned tag_len = 0;
564 
566  tag_len = ff_id3v2_tag_len(buf);
567 
568  /* This check cannot overflow as tag_len has at most 28 bits */
569  if (p->buf_size < tag_len + 5)
570  /* EA3 header comes late, might be outside of the probe buffer */
571  return tag_len ? AVPROBE_SCORE_EXTENSION/2 : 0;
572 
573  buf += tag_len;
574 
575  if (!memcmp(buf, "EA3", 3) && !buf[4] && buf[5] == EA3_HEADER_SIZE)
576  return AVPROBE_SCORE_MAX;
577  else
578  return 0;
579 }
580 
581 static int oma_read_seek(struct AVFormatContext *s,
582  int stream_index, int64_t timestamp, int flags)
583 {
584  OMAContext *oc = s->priv_data;
585  AVStream *st = s->streams[0];
586  int64_t err;
587 
590  return -1;
591 
592  err = ff_pcm_read_seek(s, stream_index, timestamp, flags);
593  if (!oc->encrypted)
594  return err;
595 
596  /* readjust IV for CBC */
597  if (err || avio_tell(s->pb) < oc->content_start)
598  goto wipe;
599  if ((err = avio_seek(s->pb, -8, SEEK_CUR)) < 0)
600  goto wipe;
601  if ((err = avio_read(s->pb, oc->iv, 8)) < 8) {
602  if (err >= 0)
603  err = AVERROR_EOF;
604  goto wipe;
605  }
606 
607  return 0;
608 wipe:
609  memset(oc->iv, 0, 8);
610  return err;
611 }
612 
614  .name = "oma",
615  .long_name = NULL_IF_CONFIG_SMALL("Sony OpenMG audio"),
616  .priv_data_size = sizeof(OMAContext),
623  .extensions = "oma,omg,aa3",
624  .codec_tag = (const AVCodecTag* const []){ff_oma_codec_tags, 0},
625 };
static int oma_read_header(AVFormatContext *s)
Definition: omadec.c:394
#define NULL
Definition: coverity.c:32
static int rprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size, const uint8_t *r_val)
Definition: omadec.c:132
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
void av_des_crypt(AVDES *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt)
Encrypts / decrypts using the DES algorithm.
Definition: des.c:322
int size
union ID3v2ExtraMeta::@255 data
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3158
static int aal_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:351
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:375
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4938
AVInputFormat ff_oma_demuxer
Definition: omadec.c:613
uint8_t r_val[24]
Definition: omadec.c:70
uint8_t sm_val[8]
Definition: omadec.c:74
#define avpriv_request_sample(...)
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
#define OMA_RPROBE_M_VAL
Definition: omadec.c:130
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
int num
Numerator.
Definition: rational.h:59
uint32_t datasize
Definition: id3v2.h:58
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:241
uint32_t rid
Definition: omadec.c:69
#define AV_RB24
Definition: intreadwrite.h:64
uint8_t iv[8]
Definition: omadec.c:76
#define ID3v2_EA3_MAGIC
Definition: oma.h:29
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:329
static AVPacket pkt
#define AV_CH_LAYOUT_STEREO
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:763
static int kset(AVFormatContext *s, const uint8_t *r_val, const uint8_t *n_val, int len)
Definition: omadec.c:101
static int oma_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:554
int encrypted
Definition: omadec.c:64
const AVCodecTag ff_oma_codec_tags[]
Definition: oma.c:28
Format I/O context.
Definition: avformat.h:1351
#define ID3v2_HEADER_SIZE
Definition: id3v2.h:30
uint8_t
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:778
#define AV_RB32
Definition: intreadwrite.h:130
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:373
enum AVStreamParseType need_parsing
Definition: avformat.h:1094
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4519
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
int ff_id3v2_parse_chapters(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
Create chapters for all CHAP tags found in the ID3v2 header.
Definition: id3v2.c:1170
uint8_t * description
Definition: id3v2.h:61
uint8_t * data
Definition: packet.h:355
uint32_t tag
Definition: movenc.c:1532
#define AVERROR_EOF
End of file.
Definition: error.h:55
uint16_t i_size
Definition: omadec.c:67
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
Allocate and read the payload of a packet and initialize its fields with default values.
Definition: utils.c:304
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
static const uint8_t header[24]
Definition: sdr2.c:67
full parsing and repack with timestamp and position generation by parser for raw this assumes that ea...
Definition: avformat.h:799
uint64_t channel_layout
Audio only.
Definition: codec_par.h:162
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:625
uint8_t * data
Definition: id3v2.h:62
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:89
#define AV_WL64(p, v)
Definition: intreadwrite.h:440
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:1552
int(* read_packet)(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:79
#define AV_RB16
Definition: intreadwrite.h:53
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
uint64_t content_start
Definition: omadec.c:63
unsigned int pos
Definition: spdifenc.c:410
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
int av_des_init(AVDES *d, const uint8_t *key, int key_bits, av_unused int decrypt)
Definition: des.c:278
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1114
int av_log_get_level(void)
Get the current log level.
Definition: log.c:435
#define fail()
Definition: checkasm.h:123
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:361
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:444
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
int block_align
Audio only.
Definition: codec_par.h:177
const char * name
Definition: qsvenc.c:46
audio channel layout utility functions
int ff_alloc_extradata(AVCodecParameters *par, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0...
Definition: utils.c:3321
unsigned int avio_rb24(AVIOContext *s)
Definition: aviobuf.c:771
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
#define FFMIN(a, b)
Definition: common.h:96
uint16_t s_size
Definition: omadec.c:68
#define s(width, name)
Definition: cbs_vp9.c:257
int ff_pcm_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: pcm.c:52
uint8_t s_val[8]
Definition: omadec.c:73
#define OMA_ENC_HEADER_SIZE
Definition: oma.h:30
#define FF_ARRAY_ELEMS(a)
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
#define EA3_HEADER_SIZE
Definition: oma.h:28
Stream structure.
Definition: avformat.h:876
AVDES * av_des_alloc(void)
Allocate an AVDES context.
Definition: des.c:273
uint16_t k_size
Definition: omadec.c:65
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
struct ID3v2ExtraMeta * next
Definition: id3v2.h:86
static int decrypt_init(AVFormatContext *s, ID3v2ExtraMeta *em, uint8_t *header)
Definition: omadec.c:217
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
const uint64_t ff_oma_chid_to_native_layout[7]
map ATRAC-X channel id to internal channel layout
Definition: oma.c:39
static void hex_log(AVFormatContext *s, int level, const char *name, const uint8_t *value, int len)
Definition: omadec.c:89
static int oma_read_probe(const AVProbeData *p)
Definition: omadec.c:560
double value
Definition: eval.c:98
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:463
void av_des_mac(AVDES *d, uint8_t *dst, const uint8_t *src, int count)
Calculates CBC-MAC using the DES algorithm.
Definition: des.c:328
static const uint64_t leaf_table[]
Definition: omadec.c:56
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:451
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
static int oma_read_seek(struct AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: omadec.c:581
static int64_t pts
#define flags(name, subs,...)
Definition: cbs_av1.c:564
uint8_t e_val[8]
Definition: omadec.c:75
uint8_t level
Definition: svq3.c:209
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
int sample_rate
Audio only.
Definition: codec_par.h:170
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
const uint8_t * key
Definition: avformat.h:1527
const int ff_oma_chid_to_num_channels[7]
map ATRAC-X channel id to total number of channels
Definition: oma.c:50
Main libavformat public API header.
int
uint8_t m_val[8]
Definition: omadec.c:72
int ff_id3v2_match(const uint8_t *buf, const char *magic)
Detect ID3v2 Header.
Definition: id3v2.c:143
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
Definition: avformat.h:915
const char * tag
Definition: id3v2.h:85
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
void ff_id3v2_read(AVFormatContext *s, const char *magic, ID3v2ExtraMeta **extra_meta, unsigned int max_search_size)
Read an ID3v2 tag, including supported extra metadata.
Definition: id3v2.c:1108
int den
Denominator.
Definition: rational.h:60
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: packet.h:389
#define MKBETAG(a, b, c, d)
Definition: common.h:407
ID3v2ExtraMetaGEOB geob
Definition: id3v2.h:90
static int nprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size, const uint8_t *n_val)
Definition: omadec.c:168
#define av_free(p)
int len
int ff_id3v2_tag_len(const uint8_t *buf)
Get the length of an ID3v2 tag.
Definition: id3v2.c:156
void * priv_data
Format private data.
Definition: avformat.h:1379
uint8_t n_val[24]
Definition: omadec.c:71
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:102
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
int channels
Audio only.
Definition: codec_par.h:166
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: packet.h:354
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:650
Definition: des.h:33
struct AVDES * av_des
Definition: omadec.c:77
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1023
static int oma_read_close(AVFormatContext *s)
Definition: omadec.c:82
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:356
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
int stream_index
Definition: packet.h:357
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:905
uint16_t e_size
Definition: omadec.c:66
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4889
This structure stores compressed data.
Definition: packet.h:332
const uint16_t ff_oma_srate_tab[8]
Definition: oma.c:26
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:348
#define AV_WL32(p, v)
Definition: intreadwrite.h:426