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  av_log(s, level, "%s: %s\n", name, buf);
112 }
113 
114 static int kset(AVFormatContext *s, const uint8_t *r_val, const uint8_t *n_val,
115  int len)
116 {
117  OMAContext *oc = s->priv_data;
118 
119  if (!r_val && !n_val)
120  return -1;
121 
122  len = FFMIN(len, 16);
123 
124  /* use first 64 bits in the third round again */
125  if (r_val) {
126  if (r_val != oc->r_val) {
127  memset(oc->r_val, 0, 24);
128  memcpy(oc->r_val, r_val, len);
129  }
130  memcpy(&oc->r_val[16], r_val, 8);
131  }
132  if (n_val) {
133  if (n_val != oc->n_val) {
134  memset(oc->n_val, 0, 24);
135  memcpy(oc->n_val, n_val, len);
136  }
137  memcpy(&oc->n_val[16], n_val, 8);
138  }
139 
140  return 0;
141 }
142 
143 #define OMA_RPROBE_M_VAL 48 + 1
144 
145 static int rprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size,
146  const uint8_t *r_val)
147 {
148  OMAContext *oc = s->priv_data;
149  unsigned int pos;
150  struct AVDES *av_des;
151 
152  if (!enc_header || !r_val ||
153  size < OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size ||
155  return -1;
156 
157  av_des = av_des_alloc();
158  if (!av_des)
159  return AVERROR(ENOMEM);
160 
161  /* m_val */
162  av_des_init(av_des, r_val, 192, 1);
163  av_des_crypt(av_des, oc->m_val, &enc_header[48], 1, NULL, 1);
164 
165  /* s_val */
166  av_des_init(av_des, oc->m_val, 64, 0);
167  av_des_crypt(av_des, oc->s_val, NULL, 1, NULL, 0);
168 
169  /* sm_val */
170  pos = OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size;
171  av_des_init(av_des, oc->s_val, 64, 0);
172  av_des_mac(av_des, oc->sm_val, &enc_header[pos], (oc->i_size >> 3));
173 
174  pos += oc->i_size;
175 
176  av_free(av_des);
177 
178  return memcmp(&enc_header[pos], oc->sm_val, 8) ? -1 : 0;
179 }
180 
181 static int nprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size,
182  const uint8_t *n_val)
183 {
184  OMAContext *oc = s->priv_data;
185  uint64_t pos;
186  uint32_t taglen, datalen;
187  struct AVDES *av_des;
188 
189  if (!enc_header || !n_val ||
190  size < OMA_ENC_HEADER_SIZE + oc->k_size + 4)
191  return -1;
192 
194  if (!memcmp(&enc_header[pos], "EKB ", 4))
195  pos += 32;
196 
197  if (size < pos + 44)
198  return -1;
199 
200  if (AV_RB32(&enc_header[pos]) != oc->rid)
201  av_log(s, AV_LOG_DEBUG, "Mismatching RID\n");
202 
203  taglen = AV_RB32(&enc_header[pos + 32]);
204  datalen = AV_RB32(&enc_header[pos + 36]) >> 4;
205 
206  pos += 44LL + taglen;
207 
208  if (pos + (((uint64_t)datalen) << 4) > size)
209  return -1;
210 
211  av_des = av_des_alloc();
212  if (!av_des)
213  return AVERROR(ENOMEM);
214 
215  av_des_init(av_des, n_val, 192, 1);
216  while (datalen-- > 0) {
217  av_des_crypt(av_des, oc->r_val, &enc_header[pos], 2, NULL, 1);
218  kset(s, oc->r_val, NULL, 16);
219  if (!rprobe(s, enc_header, size, oc->r_val)) {
220  av_free(av_des);
221  return 0;
222  }
223  pos += 16;
224  }
225 
226  av_free(av_des);
227  return -1;
228 }
229 
231 {
232  OMAContext *oc = s->priv_data;
233  ID3v2ExtraMetaGEOB *geob = NULL;
234  uint8_t *gdata;
235 
236  oc->encrypted = 1;
237  av_log(s, AV_LOG_INFO, "File is encrypted\n");
238 
239  /* find GEOB metadata */
240  for (; em; em = em->next) {
241  if (strcmp(em->tag, "GEOB"))
242  continue;
243  geob = &em->data.geob;
244  if (!strcmp(geob->description, "OMG_LSI") ||
245  !strcmp(geob->description, "OMG_BKLSI"))
246  break;
247  }
248  if (!em) {
249  av_log(s, AV_LOG_ERROR, "No encryption header found\n");
250  return AVERROR_INVALIDDATA;
251  }
252 
253  if (geob->datasize < 64) {
255  "Invalid GEOB data size: %"PRIu32"\n", geob->datasize);
256  return AVERROR_INVALIDDATA;
257  }
258 
259  gdata = geob->data;
260 
261  if (AV_RB16(gdata) != 1)
262  av_log(s, AV_LOG_WARNING, "Unknown version in encryption header\n");
263 
264  oc->k_size = AV_RB16(&gdata[2]);
265  oc->e_size = AV_RB16(&gdata[4]);
266  oc->i_size = AV_RB16(&gdata[6]);
267  oc->s_size = AV_RB16(&gdata[8]);
268 
269  if (memcmp(&gdata[OMA_ENC_HEADER_SIZE], "KEYRING ", 12)) {
270  av_log(s, AV_LOG_ERROR, "Invalid encryption header\n");
271  return AVERROR_INVALIDDATA;
272  }
273  if (OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size + 8 > geob->datasize ||
274  OMA_ENC_HEADER_SIZE + 48 > geob->datasize) {
275  av_log(s, AV_LOG_ERROR, "Too little GEOB data\n");
276  return AVERROR_INVALIDDATA;
277  }
278  oc->rid = AV_RB32(&gdata[OMA_ENC_HEADER_SIZE + 28]);
279  av_log(s, AV_LOG_DEBUG, "RID: %.8"PRIx32"\n", oc->rid);
280 
281  memcpy(oc->iv, &header[0x58], 8);
282  hex_log(s, AV_LOG_DEBUG, "IV", oc->iv, 8);
283 
284  hex_log(s, AV_LOG_DEBUG, "CBC-MAC",
285  &gdata[OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size],
286  8);
287 
288  if (s->keylen > 0) {
289  kset(s, s->key, s->key, s->keylen);
290  }
291  if (!memcmp(oc->r_val, (const uint8_t[8]){0}, 8) ||
292  rprobe(s, gdata, geob->datasize, oc->r_val) < 0 &&
293  nprobe(s, gdata, geob->datasize, oc->n_val) < 0) {
294  int i;
295  for (i = 0; i < FF_ARRAY_ELEMS(leaf_table); i += 2) {
296  uint8_t buf[16];
297  AV_WL64(buf, leaf_table[i]);
298  AV_WL64(&buf[8], leaf_table[i + 1]);
299  kset(s, buf, buf, 16);
300  if (!rprobe(s, gdata, geob->datasize, oc->r_val) ||
301  !nprobe(s, gdata, geob->datasize, oc->n_val))
302  break;
303  }
304  if (i >= FF_ARRAY_ELEMS(leaf_table)) {
305  av_log(s, AV_LOG_ERROR, "Invalid key\n");
306  return AVERROR_INVALIDDATA;
307  }
308  }
309 
310  oc->av_des = av_des_alloc();
311  if (!oc->av_des)
312  return AVERROR(ENOMEM);
313 
314  /* e_val */
315  av_des_init(oc->av_des, oc->m_val, 64, 0);
316  av_des_crypt(oc->av_des, oc->e_val,
317  &gdata[OMA_ENC_HEADER_SIZE + 40], 1, NULL, 0);
318  hex_log(s, AV_LOG_DEBUG, "EK", oc->e_val, 8);
319 
320  /* init e_val */
321  av_des_init(oc->av_des, oc->e_val, 64, 1);
322 
323  return 0;
324 }
325 
327 {
328  OMAContext *oc = s->priv_data;
329  AVStream *st = s->streams[0];
330  int packet_size = st->codecpar->block_align;
331  int byte_rate = st->codecpar->bit_rate >> 3;
332  int64_t pos = avio_tell(s->pb);
333  int ret = av_get_packet(s->pb, pkt, packet_size);
334 
335  if (ret < packet_size)
337 
338  if (ret < 0)
339  return ret;
340  if (!ret)
341  return AVERROR_EOF;
342 
343  pkt->stream_index = 0;
344 
345  if (pos >= oc->content_start && byte_rate > 0) {
346  pkt->pts =
348  byte_rate * (int64_t)st->time_base.num);
349  }
350 
351  if (oc->encrypted) {
352  /* previous unencrypted block saved in IV for
353  * the next packet (CBC mode) */
354  if (ret == packet_size)
356  (packet_size >> 3), oc->iv, 1);
357  else
358  memset(oc->iv, 0, 8);
359  }
360 
361  return ret;
362 }
363 
365 {
366  int64_t pos = avio_tell(s->pb);
367  int ret, pts;
368  int packet_size;
369  unsigned tag;
370 
371  if (avio_feof(s->pb))
372  return AVERROR_EOF;
373 
374  tag = avio_rb24(s->pb);
375  if (tag == 0)
376  return AVERROR_EOF;
377  else if (tag != MKBETAG(0,'B','L','K'))
378  return AVERROR_INVALIDDATA;
379 
380  avio_skip(s->pb, 1);
381  packet_size = avio_rb16(s->pb);
382  avio_skip(s->pb, 2);
383  pts = avio_rb32(s->pb);
384  avio_skip(s->pb, 12);
385  ret = av_get_packet(s->pb, pkt, packet_size);
386  if (ret < packet_size)
388 
389  if (ret < 0)
390  return ret;
391  if (!ret)
392  return AVERROR_EOF;
393 
394  pkt->stream_index = 0;
395  pkt->pos = pos;
396  if (s->streams[0]->codecpar->codec_id == AV_CODEC_ID_ATRAC3AL) {
397  pkt->duration = 1024;
398  pkt->pts = pts * 1024LL;
399  } else {
400  pkt->duration = 2048;
401  pkt->pts = pts * 2048LL;
402  }
403 
404  return ret;
405 }
406 
408 {
409  int ret, framesize, jsflag, samplerate;
410  uint32_t codec_params, channel_id;
411  int16_t eid;
412  uint8_t buf[EA3_HEADER_SIZE];
413  uint8_t *edata;
414  AVStream *st;
415  ID3v2ExtraMeta *extra_meta;
416  OMAContext *oc = s->priv_data;
417 
418  ff_id3v2_read(s, ID3v2_EA3_MAGIC, &extra_meta, 0);
419  if ((ret = ff_id3v2_parse_chapters(s, extra_meta)) < 0) {
420  ff_id3v2_free_extra_meta(&extra_meta);
421  return ret;
422  }
423 
424  ret = avio_read(s->pb, buf, EA3_HEADER_SIZE);
425  if (ret < EA3_HEADER_SIZE) {
426  ff_id3v2_free_extra_meta(&extra_meta);
427  return -1;
428  }
429 
430  if (memcmp(buf, ((const uint8_t[]){'E', 'A', '3'}), 3) ||
431  buf[4] != 0 || buf[5] != EA3_HEADER_SIZE) {
432  ff_id3v2_free_extra_meta(&extra_meta);
433  av_log(s, AV_LOG_ERROR, "Couldn't find the EA3 header !\n");
434  return AVERROR_INVALIDDATA;
435  }
436 
437  oc->content_start = avio_tell(s->pb);
438 
439  /* encrypted file */
440  eid = AV_RB16(&buf[6]);
441  if (eid != -1 && eid != -128 && decrypt_init(s, extra_meta, buf) < 0) {
442  ff_id3v2_free_extra_meta(&extra_meta);
443  return -1;
444  }
445 
446  ff_id3v2_free_extra_meta(&extra_meta);
447 
448  codec_params = AV_RB24(&buf[33]);
449 
450  st = avformat_new_stream(s, NULL);
451  if (!st)
452  return AVERROR(ENOMEM);
453 
454  st->start_time = 0;
456  st->codecpar->codec_tag = buf[32];
458  st->codecpar->codec_tag);
459 
460  oc->read_packet = read_packet;
461 
462  switch (buf[32]) {
463  case OMA_CODECID_ATRAC3:
464  samplerate = ff_oma_srate_tab[(codec_params >> 13) & 7] * 100;
465  if (!samplerate) {
466  av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
467  return AVERROR_INVALIDDATA;
468  }
469  if (samplerate != 44100)
470  avpriv_request_sample(s, "Sample rate %d", samplerate);
471 
472  framesize = (codec_params & 0x3FF) * 8;
473 
474  /* get stereo coding mode, 1 for joint-stereo */
475  jsflag = (codec_params >> 17) & 1;
476 
477  st->codecpar->channels = 2;
479  st->codecpar->sample_rate = samplerate;
480  st->codecpar->bit_rate = st->codecpar->sample_rate * framesize / (1024 / 8);
481 
482  /* fake the ATRAC3 extradata
483  * (wav format, makes stream copy to wav work) */
484  if ((ret = ff_alloc_extradata(st->codecpar, 14)) < 0)
485  return ret;
486 
487  edata = st->codecpar->extradata;
488  AV_WL16(&edata[0], 1); // always 1
489  AV_WL32(&edata[2], samplerate); // samples rate
490  AV_WL16(&edata[6], jsflag); // coding mode
491  AV_WL16(&edata[8], jsflag); // coding mode
492  AV_WL16(&edata[10], 1); // always 1
493  AV_WL16(&edata[12], 0); // always 0
494 
495  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
496  break;
497  case OMA_CODECID_ATRAC3P:
498  channel_id = (codec_params >> 10) & 7;
499  if (!channel_id) {
501  "Invalid ATRAC-X channel id: %"PRIu32"\n", channel_id);
502  return AVERROR_INVALIDDATA;
503  }
504  st->codecpar->channel_layout = oma_chid_to_native_layout[channel_id - 1];
505  st->codecpar->channels = oma_chid_to_num_channels[channel_id - 1];
506  framesize = ((codec_params & 0x3FF) * 8) + 8;
507  samplerate = ff_oma_srate_tab[(codec_params >> 13) & 7] * 100;
508  if (!samplerate) {
509  av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
510  return AVERROR_INVALIDDATA;
511  }
512  st->codecpar->sample_rate = samplerate;
513  st->codecpar->bit_rate = samplerate * framesize / (2048 / 8);
514  avpriv_set_pts_info(st, 64, 1, samplerate);
515  break;
516  case OMA_CODECID_MP3:
518  framesize = 1024;
519  break;
520  case OMA_CODECID_LPCM:
521  /* PCM 44.1 kHz 16 bit stereo big-endian */
522  st->codecpar->channels = 2;
524  st->codecpar->sample_rate = 44100;
525  framesize = 1024;
526  /* bit rate = sample rate x PCM block align (= 4) x 8 */
527  st->codecpar->bit_rate = st->codecpar->sample_rate * 32;
530  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
531  break;
533  st->codecpar->channels = 2;
535  st->codecpar->sample_rate = 44100;
536  avpriv_set_pts_info(st, 64, 1, 44100);
538  framesize = 4096;
539  break;
542  st->codecpar->channels = 2;
543  st->codecpar->sample_rate = 44100;
544  avpriv_set_pts_info(st, 64, 1, 44100);
546  framesize = 4096;
547  break;
548  default:
549  av_log(s, AV_LOG_ERROR, "Unsupported codec %d!\n", buf[32]);
550  return AVERROR(ENOSYS);
551  }
552 
553  st->codecpar->block_align = framesize;
554 
555  return 0;
556 }
557 
559 {
560  OMAContext *oc = s->priv_data;
561  return oc->read_packet(s, pkt);
562 }
563 
564 static int oma_read_probe(const AVProbeData *p)
565 {
566  const uint8_t *buf = p->buf;
567  unsigned tag_len = 0;
568 
570  tag_len = ff_id3v2_tag_len(buf);
571 
572  /* This check cannot overflow as tag_len has at most 28 bits */
573  if (p->buf_size < tag_len + 5)
574  /* EA3 header comes late, might be outside of the probe buffer */
575  return tag_len ? AVPROBE_SCORE_EXTENSION/2 : 0;
576 
577  buf += tag_len;
578 
579  if (!memcmp(buf, "EA3", 3) && !buf[4] && buf[5] == EA3_HEADER_SIZE)
580  return AVPROBE_SCORE_MAX;
581  else
582  return 0;
583 }
584 
585 static int oma_read_seek(struct AVFormatContext *s,
586  int stream_index, int64_t timestamp, int flags)
587 {
588  OMAContext *oc = s->priv_data;
589  AVStream *st = s->streams[0];
590  int64_t err;
591 
594  return -1;
595 
596  err = ff_pcm_read_seek(s, stream_index, timestamp, flags);
597  if (!oc->encrypted)
598  return err;
599 
600  /* readjust IV for CBC */
601  if (err || avio_tell(s->pb) < oc->content_start)
602  goto wipe;
603  if ((err = avio_seek(s->pb, -8, SEEK_CUR)) < 0)
604  goto wipe;
605  if ((err = avio_read(s->pb, oc->iv, 8)) < 8) {
606  if (err >= 0)
607  err = AVERROR_EOF;
608  goto wipe;
609  }
610 
611  return 0;
612 wipe:
613  memset(oc->iv, 0, 8);
614  return err;
615 }
616 
618  .name = "oma",
619  .long_name = NULL_IF_CONFIG_SMALL("Sony OpenMG audio"),
620  .priv_data_size = sizeof(OMAContext),
621  .flags_internal = FF_FMT_INIT_CLEANUP,
628  .extensions = "oma,omg,aa3",
629  .codec_tag = ff_oma_codec_tags_list,
630 };
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
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Definition: writing_filters.txt:88
level
uint8_t level
Definition: svq3.c:202
OMAContext::n_val
uint8_t n_val[24]
Definition: omadec.c:85
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#define FF_FMT_INIT_CLEANUP
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Definition: internal.h:49
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:768
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
OMA_CODECID_MP3
@ OMA_CODECID_MP3
Definition: oma.h:35
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
OMA_CODECID_ATRAC3PAL
@ OMA_CODECID_ATRAC3PAL
Definition: oma.h:38
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:506
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:450
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:585
OMAContext::r_val
uint8_t r_val[24]
Definition: omadec.c:84
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:459
AVCodecParameters::channels
int channels
Audio only.
Definition: codec_par.h:166
ffstream
static av_always_inline FFStream * ffstream(AVStream *st)
Definition: internal.h:432
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:504
AVFMT_GENERIC_INDEX
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:476
pts
static int64_t pts
Definition: transcode_aac.c:653
OMA_CODECID_ATRAC3P
@ OMA_CODECID_ATRAC3P
Definition: oma.h:34
ff_data_to_hex
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Write hexadecimal string corresponding to given binary data.
Definition: utils.c:1146
rprobe
static int rprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size, const uint8_t *r_val)
Definition: omadec.c:145
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:580
avio_rb32
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:790
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:650
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:429
nprobe
static int nprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size, const uint8_t *n_val)
Definition: omadec.c:181
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:655
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:449
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:230
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
OMAContext::i_size
uint16_t i_size
Definition: omadec.c:81
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
FFStream::need_parsing
enum AVStreamParseType need_parsing
Definition: internal.h:405
ID3v2ExtraMeta::tag
const char * tag
Definition: id3v2.h:85
AVFormatContext
Format I/O context.
Definition: avformat.h:1200
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:1095
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:965
NULL
#define NULL
Definition: coverity.c:32
read_packet
static int read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:326
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:447
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:457
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:505
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:783
OMA_RPROBE_M_VAL
#define OMA_RPROBE_M_VAL
Definition: omadec.c:143
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:117
ff_codec_get_id
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:357
des.h
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:617
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:364
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:114
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
OMA_CODECID_LPCM
@ OMA_CODECID_LPCM
Definition: oma.h:36
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:271
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
OMA_CODECID_ATRAC3AL
@ OMA_CODECID_ATRAC3AL
Definition: oma.h:39
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:197
oma_read_header
static int oma_read_header(AVFormatContext *s)
Definition: omadec.c:407
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:1596
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:935
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:260
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
avio_rb16
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:775
pos
unsigned int pos
Definition: spdifenc.c:412
avformat.h
ID3v2ExtraMetaGEOB::description
uint8_t * description
Definition: id3v2.h:61
OMA_CODECID_ATRAC3
@ OMA_CODECID_ATRAC3
Definition: oma.h:33
ID3v2ExtraMeta::data
union ID3v2ExtraMeta::@258 data
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:641
ID3v2ExtraMetaGEOB::data
uint8_t * data
Definition: id3v2.h:62
oma_read_probe
static int oma_read_probe(const AVProbeData *p)
Definition: omadec.c:564
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:796
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *st, 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:1195
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:347
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:558
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:975
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:153
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:451
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:375
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