FFmpeg
omadec.c
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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 
82 static void hex_log(AVFormatContext *s, int level,
83  const char *name, const uint8_t *value, int len)
84 {
85  char buf[33];
86  len = FFMIN(len, 16);
87  if (av_log_get_level() < level)
88  return;
89  ff_data_to_hex(buf, value, len, 1);
90  buf[len << 1] = '\0';
91  av_log(s, level, "%s: %s\n", name, buf);
92 }
93 
94 static int kset(AVFormatContext *s, const uint8_t *r_val, const uint8_t *n_val,
95  int len)
96 {
97  OMAContext *oc = s->priv_data;
98 
99  if (!r_val && !n_val)
100  return -1;
101 
102  len = FFMIN(len, 16);
103 
104  /* use first 64 bits in the third round again */
105  if (r_val) {
106  if (r_val != oc->r_val) {
107  memset(oc->r_val, 0, 24);
108  memcpy(oc->r_val, r_val, len);
109  }
110  memcpy(&oc->r_val[16], r_val, 8);
111  }
112  if (n_val) {
113  if (n_val != oc->n_val) {
114  memset(oc->n_val, 0, 24);
115  memcpy(oc->n_val, n_val, len);
116  }
117  memcpy(&oc->n_val[16], n_val, 8);
118  }
119 
120  return 0;
121 }
122 
123 #define OMA_RPROBE_M_VAL 48 + 1
124 
125 static int rprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size,
126  const uint8_t *r_val)
127 {
128  OMAContext *oc = s->priv_data;
129  unsigned int pos;
130  struct AVDES *av_des;
131 
132  if (!enc_header || !r_val ||
134  size < OMA_RPROBE_M_VAL)
135  return -1;
136 
137  av_des = av_des_alloc();
138  if (!av_des)
139  return AVERROR(ENOMEM);
140 
141  /* m_val */
142  av_des_init(av_des, r_val, 192, 1);
143  av_des_crypt(av_des, oc->m_val, &enc_header[48], 1, NULL, 1);
144 
145  /* s_val */
146  av_des_init(av_des, oc->m_val, 64, 0);
147  av_des_crypt(av_des, oc->s_val, NULL, 1, NULL, 0);
148 
149  /* sm_val */
150  pos = OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size;
151  av_des_init(av_des, oc->s_val, 64, 0);
152  av_des_mac(av_des, oc->sm_val, &enc_header[pos], (oc->i_size >> 3));
153 
154  pos += oc->i_size;
155 
156  av_free(av_des);
157 
158  return memcmp(&enc_header[pos], oc->sm_val, 8) ? -1 : 0;
159 }
160 
161 static int nprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size,
162  const uint8_t *n_val)
163 {
164  OMAContext *oc = s->priv_data;
165  uint64_t pos;
166  uint32_t taglen, datalen;
167  struct AVDES *av_des;
168 
169  if (!enc_header || !n_val ||
171  return -1;
172 
173  pos = OMA_ENC_HEADER_SIZE + oc->k_size;
174  if (!memcmp(&enc_header[pos], "EKB ", 4))
175  pos += 32;
176 
177  if (size < pos + 44)
178  return -1;
179 
180  if (AV_RB32(&enc_header[pos]) != oc->rid)
181  av_log(s, AV_LOG_DEBUG, "Mismatching RID\n");
182 
183  taglen = AV_RB32(&enc_header[pos + 32]);
184  datalen = AV_RB32(&enc_header[pos + 36]) >> 4;
185 
186  pos += 44LL + taglen;
187 
188  if (pos + (((uint64_t)datalen) << 4) > size)
189  return -1;
190 
191  av_des = av_des_alloc();
192  if (!av_des)
193  return AVERROR(ENOMEM);
194 
195  av_des_init(av_des, n_val, 192, 1);
196  while (datalen-- > 0) {
197  av_des_crypt(av_des, oc->r_val, &enc_header[pos], 2, NULL, 1);
198  kset(s, oc->r_val, NULL, 16);
199  if (!rprobe(s, enc_header, size, oc->r_val)) {
200  av_free(av_des);
201  return 0;
202  }
203  pos += 16;
204  }
205 
206  av_free(av_des);
207  return -1;
208 }
209 
211 {
212  OMAContext *oc = s->priv_data;
213  ID3v2ExtraMetaGEOB *geob = NULL;
214  uint8_t *gdata;
215 
216  oc->encrypted = 1;
217  av_log(s, AV_LOG_INFO, "File is encrypted\n");
218 
219  /* find GEOB metadata */
220  while (em) {
221  if (!strcmp(em->tag, "GEOB") &&
222  (geob = em->data) &&
223  (!strcmp(geob->description, "OMG_LSI") ||
224  !strcmp(geob->description, "OMG_BKLSI"))) {
225  break;
226  }
227  em = em->next;
228  }
229  if (!em) {
230  av_log(s, AV_LOG_ERROR, "No encryption header found\n");
231  return AVERROR_INVALIDDATA;
232  }
233 
234  if (geob->datasize < 64) {
235  av_log(s, AV_LOG_ERROR,
236  "Invalid GEOB data size: %"PRIu32"\n", geob->datasize);
237  return AVERROR_INVALIDDATA;
238  }
239 
240  gdata = geob->data;
241 
242  if (AV_RB16(gdata) != 1)
243  av_log(s, AV_LOG_WARNING, "Unknown version in encryption header\n");
244 
245  oc->k_size = AV_RB16(&gdata[2]);
246  oc->e_size = AV_RB16(&gdata[4]);
247  oc->i_size = AV_RB16(&gdata[6]);
248  oc->s_size = AV_RB16(&gdata[8]);
249 
250  if (memcmp(&gdata[OMA_ENC_HEADER_SIZE], "KEYRING ", 12)) {
251  av_log(s, AV_LOG_ERROR, "Invalid encryption header\n");
252  return AVERROR_INVALIDDATA;
253  }
254  if (OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size + 8 > geob->datasize ||
255  OMA_ENC_HEADER_SIZE + 48 > geob->datasize) {
256  av_log(s, AV_LOG_ERROR, "Too little GEOB data\n");
257  return AVERROR_INVALIDDATA;
258  }
259  oc->rid = AV_RB32(&gdata[OMA_ENC_HEADER_SIZE + 28]);
260  av_log(s, AV_LOG_DEBUG, "RID: %.8"PRIx32"\n", oc->rid);
261 
262  memcpy(oc->iv, &header[0x58], 8);
263  hex_log(s, AV_LOG_DEBUG, "IV", oc->iv, 8);
264 
265  hex_log(s, AV_LOG_DEBUG, "CBC-MAC",
266  &gdata[OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size],
267  8);
268 
269  if (s->keylen > 0) {
270  kset(s, s->key, s->key, s->keylen);
271  }
272  if (!memcmp(oc->r_val, (const uint8_t[8]){0}, 8) ||
273  rprobe(s, gdata, geob->datasize, oc->r_val) < 0 &&
274  nprobe(s, gdata, geob->datasize, oc->n_val) < 0) {
275  int i;
276  for (i = 0; i < FF_ARRAY_ELEMS(leaf_table); i += 2) {
277  uint8_t buf[16];
278  AV_WL64(buf, leaf_table[i]);
279  AV_WL64(&buf[8], leaf_table[i + 1]);
280  kset(s, buf, buf, 16);
281  if (!rprobe(s, gdata, geob->datasize, oc->r_val) ||
282  !nprobe(s, gdata, geob->datasize, oc->n_val))
283  break;
284  }
285  if (i >= FF_ARRAY_ELEMS(leaf_table)) {
286  av_log(s, AV_LOG_ERROR, "Invalid key\n");
287  return AVERROR_INVALIDDATA;
288  }
289  }
290 
291  oc->av_des = av_des_alloc();
292  if (!oc->av_des)
293  return AVERROR(ENOMEM);
294 
295  /* e_val */
296  av_des_init(oc->av_des, oc->m_val, 64, 0);
297  av_des_crypt(oc->av_des, oc->e_val,
298  &gdata[OMA_ENC_HEADER_SIZE + 40], 1, NULL, 0);
299  hex_log(s, AV_LOG_DEBUG, "EK", oc->e_val, 8);
300 
301  /* init e_val */
302  av_des_init(oc->av_des, oc->e_val, 64, 1);
303 
304  return 0;
305 }
306 
308 {
309  OMAContext *oc = s->priv_data;
310  AVStream *st = s->streams[0];
311  int packet_size = st->codecpar->block_align;
312  int byte_rate = st->codecpar->bit_rate >> 3;
313  int64_t pos = avio_tell(s->pb);
314  int ret = av_get_packet(s->pb, pkt, packet_size);
315 
316  if (ret < packet_size)
317  pkt->flags |= AV_PKT_FLAG_CORRUPT;
318 
319  if (ret < 0)
320  return ret;
321  if (!ret)
322  return AVERROR_EOF;
323 
324  pkt->stream_index = 0;
325 
326  if (pos >= oc->content_start && byte_rate > 0) {
327  pkt->pts =
328  pkt->dts = av_rescale(pos - oc->content_start, st->time_base.den,
329  byte_rate * (int64_t)st->time_base.num);
330  }
331 
332  if (oc->encrypted) {
333  /* previous unencrypted block saved in IV for
334  * the next packet (CBC mode) */
335  if (ret == packet_size)
336  av_des_crypt(oc->av_des, pkt->data, pkt->data,
337  (packet_size >> 3), oc->iv, 1);
338  else
339  memset(oc->iv, 0, 8);
340  }
341 
342  return ret;
343 }
344 
346 {
347  int64_t pos = avio_tell(s->pb);
348  int ret, pts;
349  int packet_size;
350  unsigned tag;
351 
352  if (avio_feof(s->pb))
353  return AVERROR_EOF;
354 
355  tag = avio_rb24(s->pb);
356  if (tag == 0)
357  return AVERROR_EOF;
358  else if (tag != MKBETAG(0,'B','L','K'))
359  return AVERROR_INVALIDDATA;
360 
361  avio_skip(s->pb, 1);
362  packet_size = avio_rb16(s->pb);
363  avio_skip(s->pb, 2);
364  pts = avio_rb32(s->pb);
365  avio_skip(s->pb, 12);
366  ret = av_get_packet(s->pb, pkt, packet_size);
367  if (ret < packet_size)
368  pkt->flags |= AV_PKT_FLAG_CORRUPT;
369 
370  if (ret < 0)
371  return ret;
372  if (!ret)
373  return AVERROR_EOF;
374 
375  pkt->stream_index = 0;
376  pkt->pos = pos;
378  pkt->duration = 1024;
379  pkt->pts = pts * 1024LL;
380  } else {
381  pkt->duration = 2048;
382  pkt->pts = pts * 2048LL;
383  }
384 
385  return ret;
386 }
387 
389 {
390  int ret, framesize, jsflag, samplerate;
391  uint32_t codec_params, channel_id;
392  int16_t eid;
394  uint8_t *edata;
395  AVStream *st;
396  ID3v2ExtraMeta *extra_meta = NULL;
397  OMAContext *oc = s->priv_data;
398 
399  ff_id3v2_read(s, ID3v2_EA3_MAGIC, &extra_meta, 0);
400  if ((ret = ff_id3v2_parse_chapters(s, &extra_meta)) < 0) {
401  ff_id3v2_free_extra_meta(&extra_meta);
402  return ret;
403  }
404 
405  ret = avio_read(s->pb, buf, EA3_HEADER_SIZE);
406  if (ret < EA3_HEADER_SIZE)
407  return -1;
408 
409  if (memcmp(buf, ((const uint8_t[]){'E', 'A', '3'}), 3) ||
410  buf[4] != 0 || buf[5] != EA3_HEADER_SIZE) {
411  av_log(s, AV_LOG_ERROR, "Couldn't find the EA3 header !\n");
412  return AVERROR_INVALIDDATA;
413  }
414 
415  oc->content_start = avio_tell(s->pb);
416 
417  /* encrypted file */
418  eid = AV_RB16(&buf[6]);
419  if (eid != -1 && eid != -128 && decrypt_init(s, extra_meta, buf) < 0) {
420  ff_id3v2_free_extra_meta(&extra_meta);
421  return -1;
422  }
423 
424  ff_id3v2_free_extra_meta(&extra_meta);
425 
426  codec_params = AV_RB24(&buf[33]);
427 
428  st = avformat_new_stream(s, NULL);
429  if (!st)
430  return AVERROR(ENOMEM);
431 
432  st->start_time = 0;
434  st->codecpar->codec_tag = buf[32];
436  st->codecpar->codec_tag);
437 
438  oc->read_packet = read_packet;
439 
440  switch (buf[32]) {
441  case OMA_CODECID_ATRAC3:
442  samplerate = ff_oma_srate_tab[(codec_params >> 13) & 7] * 100;
443  if (!samplerate) {
444  av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
445  return AVERROR_INVALIDDATA;
446  }
447  if (samplerate != 44100)
448  avpriv_request_sample(s, "Sample rate %d", samplerate);
449 
450  framesize = (codec_params & 0x3FF) * 8;
451 
452  /* get stereo coding mode, 1 for joint-stereo */
453  jsflag = (codec_params >> 17) & 1;
454 
455  st->codecpar->channels = 2;
457  st->codecpar->sample_rate = samplerate;
458  st->codecpar->bit_rate = st->codecpar->sample_rate * framesize / (1024 / 8);
459 
460  /* fake the ATRAC3 extradata
461  * (wav format, makes stream copy to wav work) */
462  if (ff_alloc_extradata(st->codecpar, 14))
463  return AVERROR(ENOMEM);
464 
465  edata = st->codecpar->extradata;
466  AV_WL16(&edata[0], 1); // always 1
467  AV_WL32(&edata[2], samplerate); // samples rate
468  AV_WL16(&edata[6], jsflag); // coding mode
469  AV_WL16(&edata[8], jsflag); // coding mode
470  AV_WL16(&edata[10], 1); // always 1
471  // AV_WL16(&edata[12], 0); // always 0
472 
473  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
474  break;
475  case OMA_CODECID_ATRAC3P:
476  channel_id = (codec_params >> 10) & 7;
477  if (!channel_id) {
478  av_log(s, AV_LOG_ERROR,
479  "Invalid ATRAC-X channel id: %"PRIu32"\n", channel_id);
480  return AVERROR_INVALIDDATA;
481  }
483  st->codecpar->channels = ff_oma_chid_to_num_channels[channel_id - 1];
484  framesize = ((codec_params & 0x3FF) * 8) + 8;
485  samplerate = ff_oma_srate_tab[(codec_params >> 13) & 7] * 100;
486  if (!samplerate) {
487  av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
488  return AVERROR_INVALIDDATA;
489  }
490  st->codecpar->sample_rate = samplerate;
491  st->codecpar->bit_rate = samplerate * framesize / (2048 / 8);
492  avpriv_set_pts_info(st, 64, 1, samplerate);
493  break;
494  case OMA_CODECID_MP3:
496  framesize = 1024;
497  break;
498  case OMA_CODECID_LPCM:
499  /* PCM 44.1 kHz 16 bit stereo big-endian */
500  st->codecpar->channels = 2;
502  st->codecpar->sample_rate = 44100;
503  framesize = 1024;
504  /* bit rate = sample rate x PCM block align (= 4) x 8 */
505  st->codecpar->bit_rate = st->codecpar->sample_rate * 32;
508  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
509  break;
511  st->codecpar->channels = 2;
513  st->codecpar->sample_rate = 44100;
514  avpriv_set_pts_info(st, 64, 1, 44100);
516  framesize = 4096;
517  break;
520  st->codecpar->channels = 2;
521  st->codecpar->sample_rate = 44100;
522  avpriv_set_pts_info(st, 64, 1, 44100);
524  framesize = 4096;
525  break;
526  default:
527  av_log(s, AV_LOG_ERROR, "Unsupported codec %d!\n", buf[32]);
528  return AVERROR(ENOSYS);
529  }
530 
531  st->codecpar->block_align = framesize;
532 
533  return 0;
534 }
535 
537 {
538  OMAContext *oc = s->priv_data;
539  return oc->read_packet(s, pkt);
540 }
541 
542 static int oma_read_probe(const AVProbeData *p)
543 {
544  const uint8_t *buf = p->buf;
545  unsigned tag_len = 0;
546 
548  tag_len = ff_id3v2_tag_len(buf);
549 
550  /* This check cannot overflow as tag_len has at most 28 bits */
551  if (p->buf_size < tag_len + 5)
552  /* EA3 header comes late, might be outside of the probe buffer */
553  return tag_len ? AVPROBE_SCORE_EXTENSION/2 : 0;
554 
555  buf += tag_len;
556 
557  if (!memcmp(buf, "EA3", 3) && !buf[4] && buf[5] == EA3_HEADER_SIZE)
558  return AVPROBE_SCORE_MAX;
559  else
560  return 0;
561 }
562 
563 static int oma_read_seek(struct AVFormatContext *s,
564  int stream_index, int64_t timestamp, int flags)
565 {
566  OMAContext *oc = s->priv_data;
567  AVStream *st = s->streams[0];
568  int64_t err;
569 
572  return -1;
573 
574  err = ff_pcm_read_seek(s, stream_index, timestamp, flags);
575  if (!oc->encrypted)
576  return err;
577 
578  /* readjust IV for CBC */
579  if (err || avio_tell(s->pb) < oc->content_start)
580  goto wipe;
581  if ((err = avio_seek(s->pb, -8, SEEK_CUR)) < 0)
582  goto wipe;
583  if ((err = avio_read(s->pb, oc->iv, 8)) < 8) {
584  if (err >= 0)
585  err = AVERROR_EOF;
586  goto wipe;
587  }
588 
589  return 0;
590 wipe:
591  memset(oc->iv, 0, 8);
592  return err;
593 }
594 
596 {
597  OMAContext *oc = s->priv_data;
598  av_free(oc->av_des);
599  return 0;
600 }
601 
603  .name = "oma",
604  .long_name = NULL_IF_CONFIG_SMALL("Sony OpenMG audio"),
605  .priv_data_size = sizeof(OMAContext),
612  .extensions = "oma,omg,aa3",
613  .codec_tag = (const AVCodecTag* const []){ff_oma_codec_tags, 0},
614 };
static int oma_read_header(AVFormatContext *s)
Definition: omadec.c:388
#define NULL
Definition: coverity.c:32
void * data
Definition: id3v2.h:59
static int rprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size, const uint8_t *r_val)
Definition: omadec.c:125
#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
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3135
static int aal_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:345
#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: avcodec.h:1500
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:4896
AVInputFormat ff_oma_demuxer
Definition: omadec.c:602
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:123
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3960
int num
Numerator.
Definition: rational.h:59
uint32_t datasize
Definition: id3v2.h:64
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:246
uint32_t rid
Definition: omadec.c:69
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:334
static AVPacket pkt
#define AV_CH_LAYOUT_STEREO
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:788
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
Definition: bytestream.h:87
static int kset(AVFormatContext *s, const uint8_t *r_val, const uint8_t *n_val, int len)
Definition: omadec.c:94
static int oma_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:536
int encrypted
Definition: omadec.c:64
const AVCodecTag ff_oma_codec_tags[]
Definition: oma.c:28
Format I/O context.
Definition: avformat.h:1358
#define ID3v2_HEADER_SIZE
Definition: id3v2.h:30
uint8_t
int ff_id3v2_parse_chapters(AVFormatContext *s, ID3v2ExtraMeta **extra_meta)
Create chapters for all CHAP tags found in the ID3v2 header.
Definition: id3v2.c:1183
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:803
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1498
enum AVStreamParseType need_parsing
Definition: avformat.h:1099
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:108
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4469
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:87
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1426
uint8_t * description
Definition: id3v2.h:67
uint8_t * data
Definition: avcodec.h:1480
uint32_t tag
Definition: movenc.c:1531
#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:310
ptrdiff_t size
Definition: opengl_enc.c:100
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:804
uint64_t channel_layout
Audio only.
Definition: avcodec.h:4062
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:650
uint8_t * data
Definition: id3v2.h:68
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3989
#define AV_WL64(p, v)
Definition: intreadwrite.h:440
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
#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:1517
int(* read_packet)(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:79
#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
#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: avcodec.h:3956
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1127
int av_log_get_level(void)
Get the current log level.
Definition: log.c:380
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1486
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:449
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:448
int block_align
Audio only.
Definition: avcodec.h:4077
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:3298
unsigned int avio_rb24(AVIOContext *s)
Definition: aviobuf.c:796
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:530
#define EA3_HEADER_SIZE
Definition: oma.h:28
Stream structure.
Definition: avformat.h:881
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:60
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_RB24
Definition: bytestream.h:87
static int decrypt_init(AVFormatContext *s, ID3v2ExtraMeta *em, uint8_t *header)
Definition: omadec.c:210
AVIOContext * pb
I/O context.
Definition: avformat.h:1400
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:82
static int oma_read_probe(const AVProbeData *p)
Definition: omadec.c:542
void * buf
Definition: avisynth_c.h:766
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:468
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:456
This structure contains the data a format has to probe a file.
Definition: avformat.h:446
static int oma_read_seek(struct AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: omadec.c:563
static int64_t pts
#define flags(name, subs,...)
Definition: cbs_av1.c:561
uint8_t e_val[8]
Definition: omadec.c:75
uint8_t level
Definition: svq3.c:207
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
int sample_rate
Audio only.
Definition: avcodec.h:4070
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:458
const uint8_t * key
Definition: avformat.h:1534
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:920
const char * tag
Definition: id3v2.h:58
#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:1121
int den
Denominator.
Definition: rational.h:60
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: avcodec.h:1513
#define MKBETAG(a, b, c, d)
Definition: common.h:367
static int nprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size, const uint8_t *n_val)
Definition: omadec.c:161
#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:1386
uint8_t n_val[24]
Definition: omadec.c:71
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: avcodec.h:4002
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3974
int channels
Audio only.
Definition: avcodec.h:4066
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1479
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:654
Definition: des.h:33
struct AVDES * av_des
Definition: omadec.c:77
static int oma_read_close(AVFormatContext *s)
Definition: omadec.c:595
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1028
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:361
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3964
int stream_index
Definition: avcodec.h:1482
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:910
uint16_t e_size
Definition: omadec.c:66
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4847
This structure stores compressed data.
Definition: avcodec.h:1457
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: avcodec.h:1473
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
const char * name
Definition: opengl_enc.c:102