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 /** map ATRAC-X channel id to internal channel layout */
63 static const uint64_t oma_chid_to_native_layout[7] = {
71 };
72 
73 /** map ATRAC-X channel id to total number of channels */
74 static const int oma_chid_to_num_channels[7] = { 1, 2, 3, 4, 6, 7, 8 };
75 
76 typedef struct OMAContext {
77  uint64_t content_start;
78  int encrypted;
79  uint16_t k_size;
80  uint16_t e_size;
81  uint16_t i_size;
82  uint16_t s_size;
83  uint32_t rid;
84  uint8_t r_val[24];
85  uint8_t n_val[24];
86  uint8_t m_val[8];
87  uint8_t s_val[8];
88  uint8_t sm_val[8];
89  uint8_t e_val[8];
90  uint8_t iv[8];
91  struct AVDES *av_des;
92 
94 } OMAContext;
95 
97 {
98  OMAContext *oc = s->priv_data;
99  av_freep(&oc->av_des);
100  return 0;
101 }
102 
103 static void hex_log(AVFormatContext *s, int level,
104  const char *name, const uint8_t *value, int len)
105 {
106  char buf[33];
107  len = FFMIN(len, 16);
108  if (av_log_get_level() < level)
109  return;
110  ff_data_to_hex(buf, value, len, 1);
111  buf[len << 1] = '\0';
112  av_log(s, level, "%s: %s\n", name, buf);
113 }
114 
115 static int kset(AVFormatContext *s, const uint8_t *r_val, const uint8_t *n_val,
116  int len)
117 {
118  OMAContext *oc = s->priv_data;
119 
120  if (!r_val && !n_val)
121  return -1;
122 
123  len = FFMIN(len, 16);
124 
125  /* use first 64 bits in the third round again */
126  if (r_val) {
127  if (r_val != oc->r_val) {
128  memset(oc->r_val, 0, 24);
129  memcpy(oc->r_val, r_val, len);
130  }
131  memcpy(&oc->r_val[16], r_val, 8);
132  }
133  if (n_val) {
134  if (n_val != oc->n_val) {
135  memset(oc->n_val, 0, 24);
136  memcpy(oc->n_val, n_val, len);
137  }
138  memcpy(&oc->n_val[16], n_val, 8);
139  }
140 
141  return 0;
142 }
143 
144 #define OMA_RPROBE_M_VAL 48 + 1
145 
146 static int rprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size,
147  const uint8_t *r_val)
148 {
149  OMAContext *oc = s->priv_data;
150  unsigned int pos;
151  struct AVDES *av_des;
152 
153  if (!enc_header || !r_val ||
154  size < OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size ||
156  return -1;
157 
158  av_des = av_des_alloc();
159  if (!av_des)
160  return AVERROR(ENOMEM);
161 
162  /* m_val */
163  av_des_init(av_des, r_val, 192, 1);
164  av_des_crypt(av_des, oc->m_val, &enc_header[48], 1, NULL, 1);
165 
166  /* s_val */
167  av_des_init(av_des, oc->m_val, 64, 0);
168  av_des_crypt(av_des, oc->s_val, NULL, 1, NULL, 0);
169 
170  /* sm_val */
171  pos = OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size;
172  av_des_init(av_des, oc->s_val, 64, 0);
173  av_des_mac(av_des, oc->sm_val, &enc_header[pos], (oc->i_size >> 3));
174 
175  pos += oc->i_size;
176 
177  av_free(av_des);
178 
179  return memcmp(&enc_header[pos], oc->sm_val, 8) ? -1 : 0;
180 }
181 
182 static int nprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size,
183  const uint8_t *n_val)
184 {
185  OMAContext *oc = s->priv_data;
186  uint64_t pos;
187  uint32_t taglen, datalen;
188  struct AVDES *av_des;
189 
190  if (!enc_header || !n_val ||
191  size < OMA_ENC_HEADER_SIZE + oc->k_size + 4)
192  return -1;
193 
195  if (!memcmp(&enc_header[pos], "EKB ", 4))
196  pos += 32;
197 
198  if (size < pos + 44)
199  return -1;
200 
201  if (AV_RB32(&enc_header[pos]) != oc->rid)
202  av_log(s, AV_LOG_DEBUG, "Mismatching RID\n");
203 
204  taglen = AV_RB32(&enc_header[pos + 32]);
205  datalen = AV_RB32(&enc_header[pos + 36]) >> 4;
206 
207  pos += 44LL + taglen;
208 
209  if (pos + (((uint64_t)datalen) << 4) > size)
210  return -1;
211 
212  av_des = av_des_alloc();
213  if (!av_des)
214  return AVERROR(ENOMEM);
215 
216  av_des_init(av_des, n_val, 192, 1);
217  while (datalen-- > 0) {
218  av_des_crypt(av_des, oc->r_val, &enc_header[pos], 2, NULL, 1);
219  kset(s, oc->r_val, NULL, 16);
220  if (!rprobe(s, enc_header, size, oc->r_val)) {
221  av_free(av_des);
222  return 0;
223  }
224  pos += 16;
225  }
226 
227  av_free(av_des);
228  return -1;
229 }
230 
232 {
233  OMAContext *oc = s->priv_data;
234  ID3v2ExtraMetaGEOB *geob = NULL;
235  uint8_t *gdata;
236 
237  oc->encrypted = 1;
238  av_log(s, AV_LOG_INFO, "File is encrypted\n");
239 
240  /* find GEOB metadata */
241  for (; em; em = em->next) {
242  if (strcmp(em->tag, "GEOB"))
243  continue;
244  geob = &em->data.geob;
245  if (!strcmp(geob->description, "OMG_LSI") ||
246  !strcmp(geob->description, "OMG_BKLSI"))
247  break;
248  }
249  if (!em) {
250  av_log(s, AV_LOG_ERROR, "No encryption header found\n");
251  return AVERROR_INVALIDDATA;
252  }
253 
254  if (geob->datasize < 64) {
256  "Invalid GEOB data size: %"PRIu32"\n", geob->datasize);
257  return AVERROR_INVALIDDATA;
258  }
259 
260  gdata = geob->data;
261 
262  if (AV_RB16(gdata) != 1)
263  av_log(s, AV_LOG_WARNING, "Unknown version in encryption header\n");
264 
265  oc->k_size = AV_RB16(&gdata[2]);
266  oc->e_size = AV_RB16(&gdata[4]);
267  oc->i_size = AV_RB16(&gdata[6]);
268  oc->s_size = AV_RB16(&gdata[8]);
269 
270  if (memcmp(&gdata[OMA_ENC_HEADER_SIZE], "KEYRING ", 12)) {
271  av_log(s, AV_LOG_ERROR, "Invalid encryption header\n");
272  return AVERROR_INVALIDDATA;
273  }
274  if (OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size + 8 > geob->datasize ||
275  OMA_ENC_HEADER_SIZE + 48 > geob->datasize) {
276  av_log(s, AV_LOG_ERROR, "Too little GEOB data\n");
277  return AVERROR_INVALIDDATA;
278  }
279  oc->rid = AV_RB32(&gdata[OMA_ENC_HEADER_SIZE + 28]);
280  av_log(s, AV_LOG_DEBUG, "RID: %.8"PRIx32"\n", oc->rid);
281 
282  memcpy(oc->iv, &header[0x58], 8);
283  hex_log(s, AV_LOG_DEBUG, "IV", oc->iv, 8);
284 
285  hex_log(s, AV_LOG_DEBUG, "CBC-MAC",
286  &gdata[OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size],
287  8);
288 
289  if (s->keylen > 0) {
290  kset(s, s->key, s->key, s->keylen);
291  }
292  if (!memcmp(oc->r_val, (const uint8_t[8]){0}, 8) ||
293  rprobe(s, gdata, geob->datasize, oc->r_val) < 0 &&
294  nprobe(s, gdata, geob->datasize, oc->n_val) < 0) {
295  int i;
296  for (i = 0; i < FF_ARRAY_ELEMS(leaf_table); i += 2) {
297  uint8_t buf[16];
298  AV_WL64(buf, leaf_table[i]);
299  AV_WL64(&buf[8], leaf_table[i + 1]);
300  kset(s, buf, buf, 16);
301  if (!rprobe(s, gdata, geob->datasize, oc->r_val) ||
302  !nprobe(s, gdata, geob->datasize, oc->n_val))
303  break;
304  }
305  if (i >= FF_ARRAY_ELEMS(leaf_table)) {
306  av_log(s, AV_LOG_ERROR, "Invalid key\n");
307  return AVERROR_INVALIDDATA;
308  }
309  }
310 
311  oc->av_des = av_des_alloc();
312  if (!oc->av_des)
313  return AVERROR(ENOMEM);
314 
315  /* e_val */
316  av_des_init(oc->av_des, oc->m_val, 64, 0);
317  av_des_crypt(oc->av_des, oc->e_val,
318  &gdata[OMA_ENC_HEADER_SIZE + 40], 1, NULL, 0);
319  hex_log(s, AV_LOG_DEBUG, "EK", oc->e_val, 8);
320 
321  /* init e_val */
322  av_des_init(oc->av_des, oc->e_val, 64, 1);
323 
324  return 0;
325 }
326 
328 {
329  OMAContext *oc = s->priv_data;
330  AVStream *st = s->streams[0];
331  int packet_size = st->codecpar->block_align;
332  int byte_rate = st->codecpar->bit_rate >> 3;
333  int64_t pos = avio_tell(s->pb);
334  int ret = av_get_packet(s->pb, pkt, packet_size);
335 
336  if (ret < packet_size)
338 
339  if (ret < 0)
340  return ret;
341  if (!ret)
342  return AVERROR_EOF;
343 
344  pkt->stream_index = 0;
345 
346  if (pos >= oc->content_start && byte_rate > 0) {
347  pkt->pts =
349  byte_rate * (int64_t)st->time_base.num);
350  }
351 
352  if (oc->encrypted) {
353  /* previous unencrypted block saved in IV for
354  * the next packet (CBC mode) */
355  if (ret == packet_size)
357  (packet_size >> 3), oc->iv, 1);
358  else
359  memset(oc->iv, 0, 8);
360  }
361 
362  return ret;
363 }
364 
366 {
367  int64_t pos = avio_tell(s->pb);
368  int ret, pts;
369  int packet_size;
370  unsigned tag;
371 
372  if (avio_feof(s->pb))
373  return AVERROR_EOF;
374 
375  tag = avio_rb24(s->pb);
376  if (tag == 0)
377  return AVERROR_EOF;
378  else if (tag != MKBETAG(0,'B','L','K'))
379  return AVERROR_INVALIDDATA;
380 
381  avio_skip(s->pb, 1);
382  packet_size = avio_rb16(s->pb);
383  avio_skip(s->pb, 2);
384  pts = avio_rb32(s->pb);
385  avio_skip(s->pb, 12);
386  ret = av_get_packet(s->pb, pkt, packet_size);
387  if (ret < packet_size)
389 
390  if (ret < 0)
391  return ret;
392  if (!ret)
393  return AVERROR_EOF;
394 
395  pkt->stream_index = 0;
396  pkt->pos = pos;
397  if (s->streams[0]->codecpar->codec_id == AV_CODEC_ID_ATRAC3AL) {
398  pkt->duration = 1024;
399  pkt->pts = pts * 1024LL;
400  } else {
401  pkt->duration = 2048;
402  pkt->pts = pts * 2048LL;
403  }
404 
405  return ret;
406 }
407 
409 {
410  int ret, framesize, jsflag, samplerate;
411  uint32_t codec_params, channel_id;
412  int16_t eid;
413  uint8_t buf[EA3_HEADER_SIZE];
414  uint8_t *edata;
415  AVStream *st;
416  ID3v2ExtraMeta *extra_meta;
417  OMAContext *oc = s->priv_data;
418 
419  ff_id3v2_read(s, ID3v2_EA3_MAGIC, &extra_meta, 0);
420  if ((ret = ff_id3v2_parse_chapters(s, extra_meta)) < 0) {
421  ff_id3v2_free_extra_meta(&extra_meta);
422  return ret;
423  }
424 
425  ret = avio_read(s->pb, buf, EA3_HEADER_SIZE);
426  if (ret < EA3_HEADER_SIZE) {
427  ff_id3v2_free_extra_meta(&extra_meta);
428  return -1;
429  }
430 
431  if (memcmp(buf, ((const uint8_t[]){'E', 'A', '3'}), 3) ||
432  buf[4] != 0 || buf[5] != EA3_HEADER_SIZE) {
433  ff_id3v2_free_extra_meta(&extra_meta);
434  av_log(s, AV_LOG_ERROR, "Couldn't find the EA3 header !\n");
435  return AVERROR_INVALIDDATA;
436  }
437 
438  oc->content_start = avio_tell(s->pb);
439 
440  /* encrypted file */
441  eid = AV_RB16(&buf[6]);
442  if (eid != -1 && eid != -128 && decrypt_init(s, extra_meta, buf) < 0) {
443  ff_id3v2_free_extra_meta(&extra_meta);
444  return -1;
445  }
446 
447  ff_id3v2_free_extra_meta(&extra_meta);
448 
449  codec_params = AV_RB24(&buf[33]);
450 
451  st = avformat_new_stream(s, NULL);
452  if (!st)
453  return AVERROR(ENOMEM);
454 
455  st->start_time = 0;
457  st->codecpar->codec_tag = buf[32];
459  st->codecpar->codec_tag);
460 
461  oc->read_packet = read_packet;
462 
463  switch (buf[32]) {
464  case OMA_CODECID_ATRAC3:
465  samplerate = ff_oma_srate_tab[(codec_params >> 13) & 7] * 100;
466  if (!samplerate) {
467  av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
468  return AVERROR_INVALIDDATA;
469  }
470  if (samplerate != 44100)
471  avpriv_request_sample(s, "Sample rate %d", samplerate);
472 
473  framesize = (codec_params & 0x3FF) * 8;
474 
475  /* get stereo coding mode, 1 for joint-stereo */
476  jsflag = (codec_params >> 17) & 1;
477 
478  st->codecpar->channels = 2;
480  st->codecpar->sample_rate = samplerate;
481  st->codecpar->bit_rate = st->codecpar->sample_rate * framesize / (1024 / 8);
482 
483  /* fake the ATRAC3 extradata
484  * (wav format, makes stream copy to wav work) */
485  if ((ret = ff_alloc_extradata(st->codecpar, 14)) < 0)
486  return ret;
487 
488  edata = st->codecpar->extradata;
489  AV_WL16(&edata[0], 1); // always 1
490  AV_WL32(&edata[2], samplerate); // samples rate
491  AV_WL16(&edata[6], jsflag); // coding mode
492  AV_WL16(&edata[8], jsflag); // coding mode
493  AV_WL16(&edata[10], 1); // always 1
494  // AV_WL16(&edata[12], 0); // always 0
495 
496  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
497  break;
498  case OMA_CODECID_ATRAC3P:
499  channel_id = (codec_params >> 10) & 7;
500  if (!channel_id) {
502  "Invalid ATRAC-X channel id: %"PRIu32"\n", channel_id);
503  return AVERROR_INVALIDDATA;
504  }
505  st->codecpar->channel_layout = oma_chid_to_native_layout[channel_id - 1];
506  st->codecpar->channels = oma_chid_to_num_channels[channel_id - 1];
507  framesize = ((codec_params & 0x3FF) * 8) + 8;
508  samplerate = ff_oma_srate_tab[(codec_params >> 13) & 7] * 100;
509  if (!samplerate) {
510  av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
511  return AVERROR_INVALIDDATA;
512  }
513  st->codecpar->sample_rate = samplerate;
514  st->codecpar->bit_rate = samplerate * framesize / (2048 / 8);
515  avpriv_set_pts_info(st, 64, 1, samplerate);
516  break;
517  case OMA_CODECID_MP3:
519  framesize = 1024;
520  break;
521  case OMA_CODECID_LPCM:
522  /* PCM 44.1 kHz 16 bit stereo big-endian */
523  st->codecpar->channels = 2;
525  st->codecpar->sample_rate = 44100;
526  framesize = 1024;
527  /* bit rate = sample rate x PCM block align (= 4) x 8 */
528  st->codecpar->bit_rate = st->codecpar->sample_rate * 32;
531  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
532  break;
534  st->codecpar->channels = 2;
536  st->codecpar->sample_rate = 44100;
537  avpriv_set_pts_info(st, 64, 1, 44100);
539  framesize = 4096;
540  break;
543  st->codecpar->channels = 2;
544  st->codecpar->sample_rate = 44100;
545  avpriv_set_pts_info(st, 64, 1, 44100);
547  framesize = 4096;
548  break;
549  default:
550  av_log(s, AV_LOG_ERROR, "Unsupported codec %d!\n", buf[32]);
551  return AVERROR(ENOSYS);
552  }
553 
554  st->codecpar->block_align = framesize;
555 
556  return 0;
557 }
558 
560 {
561  OMAContext *oc = s->priv_data;
562  return oc->read_packet(s, pkt);
563 }
564 
565 static int oma_read_probe(const AVProbeData *p)
566 {
567  const uint8_t *buf = p->buf;
568  unsigned tag_len = 0;
569 
571  tag_len = ff_id3v2_tag_len(buf);
572 
573  /* This check cannot overflow as tag_len has at most 28 bits */
574  if (p->buf_size < tag_len + 5)
575  /* EA3 header comes late, might be outside of the probe buffer */
576  return tag_len ? AVPROBE_SCORE_EXTENSION/2 : 0;
577 
578  buf += tag_len;
579 
580  if (!memcmp(buf, "EA3", 3) && !buf[4] && buf[5] == EA3_HEADER_SIZE)
581  return AVPROBE_SCORE_MAX;
582  else
583  return 0;
584 }
585 
586 static int oma_read_seek(struct AVFormatContext *s,
587  int stream_index, int64_t timestamp, int flags)
588 {
589  OMAContext *oc = s->priv_data;
590  AVStream *st = s->streams[0];
591  int64_t err;
592 
595  return -1;
596 
597  err = ff_pcm_read_seek(s, stream_index, timestamp, flags);
598  if (!oc->encrypted)
599  return err;
600 
601  /* readjust IV for CBC */
602  if (err || avio_tell(s->pb) < oc->content_start)
603  goto wipe;
604  if ((err = avio_seek(s->pb, -8, SEEK_CUR)) < 0)
605  goto wipe;
606  if ((err = avio_read(s->pb, oc->iv, 8)) < 8) {
607  if (err >= 0)
608  err = AVERROR_EOF;
609  goto wipe;
610  }
611 
612  return 0;
613 wipe:
614  memset(oc->iv, 0, 8);
615  return err;
616 }
617 
619  .name = "oma",
620  .long_name = NULL_IF_CONFIG_SMALL("Sony OpenMG audio"),
621  .priv_data_size = sizeof(OMAContext),
622  .flags_internal = FF_FMT_INIT_CLEANUP,
629  .extensions = "oma,omg,aa3",
630  .codec_tag = ff_oma_codec_tags_list,
631 };
av_des_init
int av_des_init(AVDES *d, const uint8_t *key, int key_bits, av_unused int decrypt)
Definition: des.c:278
OMAContext::iv
uint8_t iv[8]
Definition: omadec.c:90
oma.h
AV_LOG_WARNING
#define AV_LOG_WARNING
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Definition: log.h:186
ID3v2ExtraMeta::geob
ID3v2ExtraMetaGEOB geob
Definition: id3v2.h:90
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
name
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default minimum maximum flags name is the option name
Definition: writing_filters.txt:88
level
uint8_t level
Definition: svq3.c:204
OMAContext::n_val
uint8_t n_val[24]
Definition: omadec.c:85
FF_FMT_INIT_CLEANUP
#define FF_FMT_INIT_CLEANUP
For an AVInputFormat with this flag set read_close() needs to be called by the caller upon read_heade...
Definition: internal.h:48
AVERROR
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
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4375
pcm.h
OMAContext::rid
uint32_t rid
Definition: omadec.c:83
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
AV_WL32
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
ID3v2ExtraMeta::next
struct ID3v2ExtraMeta * next
Definition: id3v2.h:86
OMAContext::av_des
struct AVDES * av_des
Definition: omadec.c:91
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
ff_oma_codec_tags_list
const AVCodecTag *const ff_oma_codec_tags_list[]
Definition: oma.c:38
av_des_crypt
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
AV_CH_LAYOUT_MONO
#define AV_CH_LAYOUT_MONO
Definition: channel_layout.h:90
hex_log
static void hex_log(AVFormatContext *s, int level, const char *name, const uint8_t *value, int len)
Definition: omadec.c:103
id3v2.h
AVPacket::data
uint8_t * data
Definition: packet.h:373
ff_oma_srate_tab
const uint16_t ff_oma_srate_tab[8]
Definition: oma.c:26
OMA_ENC_HEADER_SIZE
#define OMA_ENC_HEADER_SIZE
Definition: oma.h:30
AVStream::internal
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1009
ff_id3v2_read
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:1135
AV_CODEC_ID_ATRAC3PAL
@ AV_CODEC_ID_ATRAC3PAL
Definition: codec_id.h:505
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:391
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
mathematics.h
AVProbeData::buf_size
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:449
ID3v2ExtraMetaGEOB
Definition: id3v2.h:57
oma_read_seek
static int oma_read_seek(struct AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: omadec.c:586
OMAContext::r_val
uint8_t r_val[24]
Definition: omadec.c:84
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:458
OMA_CODECID_ATRAC3AL
@ OMA_CODECID_ATRAC3AL
Definition: oma.h:39
AVCodecParameters::channels
int channels
Audio only.
Definition: codec_par.h:166
read_seek
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:149
read_close
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:141
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:538
AVFMT_GENERIC_INDEX
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:468
pts
static int64_t pts
Definition: transcode_aac.c:653
ff_data_to_hex
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4751
rprobe
static int rprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size, const uint8_t *r_val)
Definition: omadec.c:146
AVRational::num
int num
Numerator.
Definition: rational.h:59
AV_CH_LAYOUT_STEREO
#define AV_CH_LAYOUT_STEREO
Definition: channel_layout.h:91
ff_id3v2_parse_chapters
int ff_id3v2_parse_chapters(AVFormatContext *s, ID3v2ExtraMeta *cur)
Create chapters for all CHAP tags found in the ID3v2 header.
Definition: id3v2.c:1188
OMAContext
Definition: omadec.c:76
OMAContext::read_packet
int(* read_packet)(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:93
av_get_bits_per_sample
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:585
avio_rb32
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:764
pkt
AVPacket * pkt
Definition: movenc.c:59
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
AVInputFormat
Definition: avformat.h:626
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen.c:29
AV_PKT_FLAG_CORRUPT
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: packet.h:426
nprobe
static int nprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size, const uint8_t *n_val)
Definition: omadec.c:182
OMAContext::encrypted
int encrypted
Definition: omadec.c:78
ID3v2ExtraMeta
Definition: id3v2.h:84
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:257
av_des_mac
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
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:631
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:448
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
decrypt_init
static int decrypt_init(AVFormatContext *s, ID3v2ExtraMeta *em, uint8_t *header)
Definition: omadec.c:231
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
OMA_CODECID_MP3
@ OMA_CODECID_MP3
Definition: oma.h:35
OMAContext::i_size
uint16_t i_size
Definition: omadec.c:81
OMA_CODECID_ATRAC3
@ OMA_CODECID_ATRAC3
Definition: oma.h:33
OMA_CODECID_ATRAC3P
@ OMA_CODECID_ATRAC3P
Definition: oma.h:34
ID3v2ExtraMetaGEOB::datasize
uint32_t datasize
Definition: id3v2.h:58
oma_chid_to_num_channels
static const int oma_chid_to_num_channels[7]
map ATRAC-X channel id to total number of channels
Definition: omadec.c:74
ID3v2ExtraMeta::tag
const char * tag
Definition: id3v2.h:85
AVFormatContext
Format I/O context.
Definition: avformat.h:1107
av_log_get_level
int av_log_get_level(void)
Get the current log level.
Definition: log.c:435
internal.h
ff_oma_codec_tags
const AVCodecTag ff_oma_codec_tags[]
Definition: oma.c:28
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:994
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
AVStream::time_base
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avformat.h:870
NULL
#define NULL
Definition: coverity.c:32
read_packet
static int read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:327
read_probe
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
OMAContext::s_size
uint16_t s_size
Definition: omadec.c:82
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:446
ID3v2_HEADER_SIZE
#define ID3v2_HEADER_SIZE
Definition: id3v2.h:30
AVPROBE_SCORE_EXTENSION
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:456
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:170
AV_CODEC_ID_ATRAC3AL
@ AV_CODEC_ID_ATRAC3AL
Definition: codec_id.h:504
OMAContext::content_start
uint64_t content_start
Definition: omadec.c:77
ID3v2_EA3_MAGIC
#define ID3v2_EA3_MAGIC
Definition: oma.h:29
avio_rb24
unsigned int avio_rb24(AVIOContext *s)
Definition: aviobuf.c:757
OMA_RPROBE_M_VAL
#define OMA_RPROBE_M_VAL
Definition: omadec.c:144
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:116
ff_codec_get_id
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3082
des.h
avpriv_set_pts_info
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:4800
size
int size
Definition: twinvq_data.h:10344
MKBETAG
#define MKBETAG(a, b, c, d)
Definition: macros.h:56
AV_RB32
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:96
ff_oma_demuxer
const AVInputFormat ff_oma_demuxer
Definition: omadec.c:618
header
static const uint8_t header[24]
Definition: sdr2.c:67
aal_read_packet
static int aal_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:365
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:372
AV_WL16
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
AV_WL64
#define AV_WL64(p, v)
Definition: intreadwrite.h:440
kset
static int kset(AVFormatContext *s, const uint8_t *r_val, const uint8_t *n_val, int len)
Definition: omadec.c:115
AV_CH_LAYOUT_5POINT1_BACK
#define AV_CH_LAYOUT_5POINT1_BACK
Definition: channel_layout.h:103
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:379
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:191
av_des_alloc
AVDES * av_des_alloc(void)
Allocate an AVDES context.
Definition: des.c:273
OMAContext::s_val
uint8_t s_val[8]
Definition: omadec.c:87
oma_read_close
static int oma_read_close(AVFormatContext *s)
Definition: omadec.c:96
i
int i
Definition: input.c:406
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:366
AVCodecParameters::block_align
int block_align
Audio only.
Definition: codec_par.h:177
AV_CH_LAYOUT_7POINT1
#define AV_CH_LAYOUT_7POINT1
Definition: channel_layout.h:112
value
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default value
Definition: writing_filters.txt:86
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
len
int len
Definition: vorbis_enc_data.h:426
av_rescale
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:128
av_get_packet
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:282
oma_read_header
static int oma_read_header(AVFormatContext *s)
Definition: omadec.c:408
OMAContext::k_size
uint16_t k_size
Definition: omadec.c:79
AVDES
Definition: des.h:33
ff_id3v2_tag_len
int ff_id3v2_tag_len(const uint8_t *buf)
Get the length of an ID3v2 tag.
Definition: id3v2.c:156
tag
uint32_t tag
Definition: movenc.c:1594
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:847
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:243
ff_pcm_read_seek
int ff_pcm_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: pcm.c:56
AV_CH_LAYOUT_SURROUND
#define AV_CH_LAYOUT_SURROUND
Definition: channel_layout.h:94
AVStreamInternal::need_parsing
enum AVStreamParseType need_parsing
Definition: internal.h:384
avio_rb16
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:749
pos
unsigned int pos
Definition: spdifenc.c:412
avformat.h
ID3v2ExtraMetaGEOB::description
uint8_t * description
Definition: id3v2.h:61
OMA_CODECID_ATRAC3PAL
@ OMA_CODECID_ATRAC3PAL
Definition: oma.h:38
channel_layout.h
AVRational::den
int den
Denominator.
Definition: rational.h:60
OMAContext::e_size
uint16_t e_size
Definition: omadec.c:80
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:616
ID3v2ExtraMetaGEOB::data
uint8_t * data
Definition: id3v2.h:62
oma_read_probe
static int oma_read_probe(const AVProbeData *p)
Definition: omadec.c:565
AVSTREAM_PARSE_FULL_RAW
@ AVSTREAM_PARSE_FULL_RAW
full parsing and repack with timestamp and position generation by parser for raw this assumes that ea...
Definition: avformat.h:772
AVPacket::stream_index
int stream_index
Definition: packet.h:375
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:327
OMA_CODECID_LPCM
@ OMA_CODECID_LPCM
Definition: oma.h:36
AVCodecParameters::bits_per_coded_sample
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:102
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:37
EA3_HEADER_SIZE
#define EA3_HEADER_SIZE
Definition: oma.h:28
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
AVPacket
This structure stores compressed data.
Definition: packet.h:350
OMAContext::e_val
uint8_t e_val[8]
Definition: omadec.c:89
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
ff_id3v2_free_extra_meta
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1141
AVPacket::pos
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:393
AVCodecParameters::channel_layout
uint64_t channel_layout
Audio only.
Definition: codec_par.h:162
AV_CH_LAYOUT_4POINT0
#define AV_CH_LAYOUT_4POINT0
Definition: channel_layout.h:96
AV_CH_LAYOUT_6POINT1_BACK
#define AV_CH_LAYOUT_6POINT1_BACK
Definition: channel_layout.h:108
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AVCodecParameters::bit_rate
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:89
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
oma_read_packet
static int oma_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:559
ID3v2ExtraMeta::data
union ID3v2ExtraMeta::@254 data
OMAContext::m_val
uint8_t m_val[8]
Definition: omadec.c:86
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
AVStream::start_time
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base.
Definition: avformat.h:880
AV_RB24
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:97
int
int
Definition: ffmpeg_filter.c:156
OMAContext::sm_val
uint8_t sm_val[8]
Definition: omadec.c:88
leaf_table
static const uint64_t leaf_table[]
Definition: omadec.c:56
ff_id3v2_match
int ff_id3v2_match(const uint8_t *buf, const char *magic)
Detect ID3v2 Header.
Definition: id3v2.c:143
AV_RB16
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:98
ff_alloc_extradata
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:3265
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:354
oma_chid_to_native_layout
static const uint64_t oma_chid_to_native_layout[7]
map ATRAC-X channel id to internal channel layout
Definition: omadec.c:63