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 
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 ||
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 ||
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
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:200
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:253
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:341
static AVPacket pkt
#define AV_CH_LAYOUT_STEREO
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:775
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: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:790
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
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:4519
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: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
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: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:637
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 AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:1561
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:153
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:215
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
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:783
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:205
struct ID3v2ExtraMeta * next
Definition: id3v2.h:86
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: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
#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:560
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:368
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
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: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
int i
Definition: input.c:406
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
const char * name
Definition: opengl_enc.c:102