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;
97  buf[len << 1] = '\0';
98  av_log(s, level, "%s: %s\n", name, buf);
99 }
100 
101 static int kset(AVFormatContext *s, const uint8_t *r_val, const uint8_t *n_val,
102  int len)
103 {
104  OMAContext *oc = s->priv_data;
105 
106  if (!r_val && !n_val)
107  return -1;
108 
109  len = FFMIN(len, 16);
110 
111  /* use first 64 bits in the third round again */
112  if (r_val) {
113  if (r_val != oc->r_val) {
114  memset(oc->r_val, 0, 24);
115  memcpy(oc->r_val, r_val, len);
116  }
117  memcpy(&oc->r_val[16], r_val, 8);
118  }
119  if (n_val) {
120  if (n_val != oc->n_val) {
121  memset(oc->n_val, 0, 24);
122  memcpy(oc->n_val, n_val, len);
123  }
124  memcpy(&oc->n_val[16], n_val, 8);
125  }
126 
127  return 0;
128 }
129 
130 #define OMA_RPROBE_M_VAL 48 + 1
131 
132 static int rprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size,
133  const uint8_t *r_val)
134 {
135  OMAContext *oc = s->priv_data;
136  unsigned int pos;
137  struct AVDES *av_des;
138 
139  if (!enc_header || !r_val ||
140  size < OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size ||
142  return -1;
143 
144  av_des = av_des_alloc();
145  if (!av_des)
146  return AVERROR(ENOMEM);
147 
148  /* m_val */
149  av_des_init(av_des, r_val, 192, 1);
150  av_des_crypt(av_des, oc->m_val, &enc_header[48], 1, NULL, 1);
151 
152  /* s_val */
153  av_des_init(av_des, oc->m_val, 64, 0);
154  av_des_crypt(av_des, oc->s_val, NULL, 1, NULL, 0);
155 
156  /* sm_val */
157  pos = OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size;
158  av_des_init(av_des, oc->s_val, 64, 0);
159  av_des_mac(av_des, oc->sm_val, &enc_header[pos], (oc->i_size >> 3));
160 
161  pos += oc->i_size;
162 
163  av_free(av_des);
164 
165  return memcmp(&enc_header[pos], oc->sm_val, 8) ? -1 : 0;
166 }
167 
168 static int nprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size,
169  const uint8_t *n_val)
170 {
171  OMAContext *oc = s->priv_data;
172  uint64_t pos;
173  uint32_t taglen, datalen;
174  struct AVDES *av_des;
175 
176  if (!enc_header || !n_val ||
177  size < OMA_ENC_HEADER_SIZE + oc->k_size + 4)
178  return -1;
179 
180  pos = OMA_ENC_HEADER_SIZE + oc->k_size;
181  if (!memcmp(&enc_header[pos], "EKB ", 4))
182  pos += 32;
183 
184  if (size < pos + 44)
185  return -1;
186 
187  if (AV_RB32(&enc_header[pos]) != oc->rid)
188  av_log(s, AV_LOG_DEBUG, "Mismatching RID\n");
189 
190  taglen = AV_RB32(&enc_header[pos + 32]);
191  datalen = AV_RB32(&enc_header[pos + 36]) >> 4;
192 
193  pos += 44LL + taglen;
194 
195  if (pos + (((uint64_t)datalen) << 4) > size)
196  return -1;
197 
198  av_des = av_des_alloc();
199  if (!av_des)
200  return AVERROR(ENOMEM);
201 
202  av_des_init(av_des, n_val, 192, 1);
203  while (datalen-- > 0) {
204  av_des_crypt(av_des, oc->r_val, &enc_header[pos], 2, NULL, 1);
205  kset(s, oc->r_val, NULL, 16);
206  if (!rprobe(s, enc_header, size, oc->r_val)) {
207  av_free(av_des);
208  return 0;
209  }
210  pos += 16;
211  }
212 
213  av_free(av_des);
214  return -1;
215 }
216 
218 {
219  OMAContext *oc = s->priv_data;
220  ID3v2ExtraMetaGEOB *geob = NULL;
221  uint8_t *gdata;
222 
223  oc->encrypted = 1;
224  av_log(s, AV_LOG_INFO, "File is encrypted\n");
225 
226  /* find GEOB metadata */
227  while (em) {
228  if (!strcmp(em->tag, "GEOB") &&
229  (geob = em->data) &&
230  (!strcmp(geob->description, "OMG_LSI") ||
231  !strcmp(geob->description, "OMG_BKLSI"))) {
232  break;
233  }
234  em = em->next;
235  }
236  if (!em) {
237  av_log(s, AV_LOG_ERROR, "No encryption header found\n");
238  return AVERROR_INVALIDDATA;
239  }
240 
241  if (geob->datasize < 64) {
243  "Invalid GEOB data size: %"PRIu32"\n", geob->datasize);
244  return AVERROR_INVALIDDATA;
245  }
246 
247  gdata = geob->data;
248 
249  if (AV_RB16(gdata) != 1)
250  av_log(s, AV_LOG_WARNING, "Unknown version in encryption header\n");
251 
252  oc->k_size = AV_RB16(&gdata[2]);
253  oc->e_size = AV_RB16(&gdata[4]);
254  oc->i_size = AV_RB16(&gdata[6]);
255  oc->s_size = AV_RB16(&gdata[8]);
256 
257  if (memcmp(&gdata[OMA_ENC_HEADER_SIZE], "KEYRING ", 12)) {
258  av_log(s, AV_LOG_ERROR, "Invalid encryption header\n");
259  return AVERROR_INVALIDDATA;
260  }
261  if (OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size + 8 > geob->datasize ||
262  OMA_ENC_HEADER_SIZE + 48 > geob->datasize) {
263  av_log(s, AV_LOG_ERROR, "Too little GEOB data\n");
264  return AVERROR_INVALIDDATA;
265  }
266  oc->rid = AV_RB32(&gdata[OMA_ENC_HEADER_SIZE + 28]);
267  av_log(s, AV_LOG_DEBUG, "RID: %.8"PRIx32"\n", oc->rid);
268 
269  memcpy(oc->iv, &header[0x58], 8);
270  hex_log(s, AV_LOG_DEBUG, "IV", oc->iv, 8);
271 
272  hex_log(s, AV_LOG_DEBUG, "CBC-MAC",
273  &gdata[OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size],
274  8);
275 
276  if (s->keylen > 0) {
277  kset(s, s->key, s->key, s->keylen);
278  }
279  if (!memcmp(oc->r_val, (const uint8_t[8]){0}, 8) ||
280  rprobe(s, gdata, geob->datasize, oc->r_val) < 0 &&
281  nprobe(s, gdata, geob->datasize, oc->n_val) < 0) {
282  int i;
283  for (i = 0; i < FF_ARRAY_ELEMS(leaf_table); i += 2) {
284  uint8_t buf[16];
285  AV_WL64(buf, leaf_table[i]);
286  AV_WL64(&buf[8], leaf_table[i + 1]);
287  kset(s, buf, buf, 16);
288  if (!rprobe(s, gdata, geob->datasize, oc->r_val) ||
289  !nprobe(s, gdata, geob->datasize, oc->n_val))
290  break;
291  }
292  if (i >= FF_ARRAY_ELEMS(leaf_table)) {
293  av_log(s, AV_LOG_ERROR, "Invalid key\n");
294  return AVERROR_INVALIDDATA;
295  }
296  }
297 
298  oc->av_des = av_des_alloc();
299  if (!oc->av_des)
300  return AVERROR(ENOMEM);
301 
302  /* e_val */
303  av_des_init(oc->av_des, oc->m_val, 64, 0);
304  av_des_crypt(oc->av_des, oc->e_val,
305  &gdata[OMA_ENC_HEADER_SIZE + 40], 1, NULL, 0);
306  hex_log(s, AV_LOG_DEBUG, "EK", oc->e_val, 8);
307 
308  /* init e_val */
309  av_des_init(oc->av_des, oc->e_val, 64, 1);
310 
311  return 0;
312 }
313 
315 {
316  OMAContext *oc = s->priv_data;
317  AVStream *st = s->streams[0];
318  int packet_size = st->codecpar->block_align;
319  int byte_rate = st->codecpar->bit_rate >> 3;
320  int64_t pos = avio_tell(s->pb);
321  int ret = av_get_packet(s->pb, pkt, packet_size);
322 
323  if (ret < packet_size)
325 
326  if (ret < 0)
327  return ret;
328  if (!ret)
329  return AVERROR_EOF;
330 
331  pkt->stream_index = 0;
332 
333  if (pos >= oc->content_start && byte_rate > 0) {
334  pkt->pts =
335  pkt->dts = av_rescale(pos - oc->content_start, st->time_base.den,
336  byte_rate * (int64_t)st->time_base.num);
337  }
338 
339  if (oc->encrypted) {
340  /* previous unencrypted block saved in IV for
341  * the next packet (CBC mode) */
342  if (ret == packet_size)
344  (packet_size >> 3), oc->iv, 1);
345  else
346  memset(oc->iv, 0, 8);
347  }
348 
349  return ret;
350 }
351 
353 {
354  int64_t pos = avio_tell(s->pb);
355  int ret, pts;
356  int packet_size;
357  unsigned tag;
358 
359  if (avio_feof(s->pb))
360  return AVERROR_EOF;
361 
362  tag = avio_rb24(s->pb);
363  if (tag == 0)
364  return AVERROR_EOF;
365  else if (tag != MKBETAG(0,'B','L','K'))
366  return AVERROR_INVALIDDATA;
367 
368  avio_skip(s->pb, 1);
369  packet_size = avio_rb16(s->pb);
370  avio_skip(s->pb, 2);
371  pts = avio_rb32(s->pb);
372  avio_skip(s->pb, 12);
373  ret = av_get_packet(s->pb, pkt, packet_size);
374  if (ret < packet_size)
376 
377  if (ret < 0)
378  return ret;
379  if (!ret)
380  return AVERROR_EOF;
381 
382  pkt->stream_index = 0;
383  pkt->pos = pos;
384  if (s->streams[0]->codecpar->codec_id == AV_CODEC_ID_ATRAC3AL) {
385  pkt->duration = 1024;
386  pkt->pts = pts * 1024LL;
387  } else {
388  pkt->duration = 2048;
389  pkt->pts = pts * 2048LL;
390  }
391 
392  return ret;
393 }
394 
396 {
397  int ret, framesize, jsflag, samplerate;
398  uint32_t codec_params, channel_id;
399  int16_t eid;
401  uint8_t *edata;
402  AVStream *st;
403  ID3v2ExtraMeta *extra_meta = NULL;
404  OMAContext *oc = s->priv_data;
405 
406  ff_id3v2_read(s, ID3v2_EA3_MAGIC, &extra_meta, 0);
407  if ((ret = ff_id3v2_parse_chapters(s, &extra_meta)) < 0) {
408  ff_id3v2_free_extra_meta(&extra_meta);
409  return ret;
410  }
411 
412  ret = avio_read(s->pb, buf, EA3_HEADER_SIZE);
413  if (ret < EA3_HEADER_SIZE) {
414  ff_id3v2_free_extra_meta(&extra_meta);
415  return -1;
416  }
417 
418  if (memcmp(buf, ((const uint8_t[]){'E', 'A', '3'}), 3) ||
419  buf[4] != 0 || buf[5] != EA3_HEADER_SIZE) {
420  ff_id3v2_free_extra_meta(&extra_meta);
421  av_log(s, AV_LOG_ERROR, "Couldn't find the EA3 header !\n");
422  return AVERROR_INVALIDDATA;
423  }
424 
425  oc->content_start = avio_tell(s->pb);
426 
427  /* encrypted file */
428  eid = AV_RB16(&buf[6]);
429  if (eid != -1 && eid != -128 && decrypt_init(s, extra_meta, buf) < 0) {
430  ff_id3v2_free_extra_meta(&extra_meta);
431  return -1;
432  }
433 
434  ff_id3v2_free_extra_meta(&extra_meta);
435 
436  codec_params = AV_RB24(&buf[33]);
437 
438  st = avformat_new_stream(s, NULL);
439  if (!st) {
440  ret = AVERROR(ENOMEM);
441  goto fail;
442  }
443 
444  st->start_time = 0;
446  st->codecpar->codec_tag = buf[32];
448  st->codecpar->codec_tag);
449 
450  oc->read_packet = read_packet;
451 
452  switch (buf[32]) {
453  case OMA_CODECID_ATRAC3:
454  samplerate = ff_oma_srate_tab[(codec_params >> 13) & 7] * 100;
455  if (!samplerate) {
456  av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
458  goto fail;
459  }
460  if (samplerate != 44100)
461  avpriv_request_sample(s, "Sample rate %d", samplerate);
462 
463  framesize = (codec_params & 0x3FF) * 8;
464 
465  /* get stereo coding mode, 1 for joint-stereo */
466  jsflag = (codec_params >> 17) & 1;
467 
468  st->codecpar->channels = 2;
470  st->codecpar->sample_rate = samplerate;
471  st->codecpar->bit_rate = st->codecpar->sample_rate * framesize / (1024 / 8);
472 
473  /* fake the ATRAC3 extradata
474  * (wav format, makes stream copy to wav work) */
475  if ((ret = ff_alloc_extradata(st->codecpar, 14)) < 0)
476  goto fail;
477 
478  edata = st->codecpar->extradata;
479  AV_WL16(&edata[0], 1); // always 1
480  AV_WL32(&edata[2], samplerate); // samples rate
481  AV_WL16(&edata[6], jsflag); // coding mode
482  AV_WL16(&edata[8], jsflag); // coding mode
483  AV_WL16(&edata[10], 1); // always 1
484  // AV_WL16(&edata[12], 0); // always 0
485 
486  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
487  break;
488  case OMA_CODECID_ATRAC3P:
489  channel_id = (codec_params >> 10) & 7;
490  if (!channel_id) {
492  "Invalid ATRAC-X channel id: %"PRIu32"\n", channel_id);
494  goto fail;
495  }
497  st->codecpar->channels = ff_oma_chid_to_num_channels[channel_id - 1];
498  framesize = ((codec_params & 0x3FF) * 8) + 8;
499  samplerate = ff_oma_srate_tab[(codec_params >> 13) & 7] * 100;
500  if (!samplerate) {
501  av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
503  goto fail;
504  }
505  st->codecpar->sample_rate = samplerate;
506  st->codecpar->bit_rate = samplerate * framesize / (2048 / 8);
507  avpriv_set_pts_info(st, 64, 1, samplerate);
508  break;
509  case OMA_CODECID_MP3:
511  framesize = 1024;
512  break;
513  case OMA_CODECID_LPCM:
514  /* PCM 44.1 kHz 16 bit stereo big-endian */
515  st->codecpar->channels = 2;
517  st->codecpar->sample_rate = 44100;
518  framesize = 1024;
519  /* bit rate = sample rate x PCM block align (= 4) x 8 */
520  st->codecpar->bit_rate = st->codecpar->sample_rate * 32;
523  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
524  break;
526  st->codecpar->channels = 2;
528  st->codecpar->sample_rate = 44100;
529  avpriv_set_pts_info(st, 64, 1, 44100);
531  framesize = 4096;
532  break;
535  st->codecpar->channels = 2;
536  st->codecpar->sample_rate = 44100;
537  avpriv_set_pts_info(st, 64, 1, 44100);
539  framesize = 4096;
540  break;
541  default:
542  av_log(s, AV_LOG_ERROR, "Unsupported codec %d!\n", buf[32]);
543  ret = AVERROR(ENOSYS);
544  goto fail;
545  }
546 
547  st->codecpar->block_align = framesize;
548 
549  return 0;
550 fail:
551  oma_read_close(s);
552  return ret;
553 }
554 
556 {
557  OMAContext *oc = s->priv_data;
558  return oc->read_packet(s, pkt);
559 }
560 
561 static int oma_read_probe(const AVProbeData *p)
562 {
563  const uint8_t *buf = p->buf;
564  unsigned tag_len = 0;
565 
567  tag_len = ff_id3v2_tag_len(buf);
568 
569  /* This check cannot overflow as tag_len has at most 28 bits */
570  if (p->buf_size < tag_len + 5)
571  /* EA3 header comes late, might be outside of the probe buffer */
572  return tag_len ? AVPROBE_SCORE_EXTENSION/2 : 0;
573 
574  buf += tag_len;
575 
576  if (!memcmp(buf, "EA3", 3) && !buf[4] && buf[5] == EA3_HEADER_SIZE)
577  return AVPROBE_SCORE_MAX;
578  else
579  return 0;
580 }
581 
582 static int oma_read_seek(struct AVFormatContext *s,
583  int stream_index, int64_t timestamp, int flags)
584 {
585  OMAContext *oc = s->priv_data;
586  AVStream *st = s->streams[0];
587  int64_t err;
588 
591  return -1;
592 
593  err = ff_pcm_read_seek(s, stream_index, timestamp, flags);
594  if (!oc->encrypted)
595  return err;
596 
597  /* readjust IV for CBC */
598  if (err || avio_tell(s->pb) < oc->content_start)
599  goto wipe;
600  if ((err = avio_seek(s->pb, -8, SEEK_CUR)) < 0)
601  goto wipe;
602  if ((err = avio_read(s->pb, oc->iv, 8)) < 8) {
603  if (err >= 0)
604  err = AVERROR_EOF;
605  goto wipe;
606  }
607 
608  return 0;
609 wipe:
610  memset(oc->iv, 0, 8);
611  return err;
612 }
613 
615  .name = "oma",
616  .long_name = NULL_IF_CONFIG_SMALL("Sony OpenMG audio"),
617  .priv_data_size = sizeof(OMAContext),
624  .extensions = "oma,omg,aa3",
625  .codec_tag = (const AVCodecTag* const []){ff_oma_codec_tags, 0},
626 };
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:76
oma.h
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3971
OMA_CODECID_ATRAC3PAL
@ OMA_CODECID_ATRAC3PAL
Definition: oma.h:38
level
uint8_t level
Definition: svq3.c:207
OMAContext::n_val
uint8_t n_val[24]
Definition: omadec.c:71
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:4480
pcm.h
OMAContext::rid
uint32_t rid
Definition: omadec.c:69
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3953
AV_WL32
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
ID3v2ExtraMeta::next
struct ID3v2ExtraMeta * next
Definition: id3v2.h:60
OMAContext::av_des
struct AVDES * av_des
Definition: omadec.c:77
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:55
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
hex_log
static void hex_log(AVFormatContext *s, int level, const char *name, const uint8_t *value, int len)
Definition: omadec.c:89
id3v2.h
name
const char * name
Definition: avisynth_c.h:867
AVPacket::data
uint8_t * data
Definition: avcodec.h:1477
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
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:1131
OMA_CODECID_ATRAC3P
@ OMA_CODECID_ATRAC3P
Definition: oma.h:34
AV_CODEC_ID_ATRAC3PAL
@ AV_CODEC_ID_ATRAC3PAL
Definition: avcodec.h:648
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1495
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3961
mathematics.h
AVProbeData::buf_size
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:449
ID3v2ExtraMetaGEOB
Definition: id3v2.h:63
oma_read_seek
static int oma_read_seek(struct AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: omadec.c:582
OMAContext::r_val
uint8_t r_val[24]
Definition: omadec.c:70
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:458
AVCodecParameters::channels
int channels
Audio only.
Definition: avcodec.h:4063
fail
#define fail()
Definition: checkasm.h:120
read_seek
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
read_close
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
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:647
ff_data_to_hex
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4861
rprobe
static int rprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size, const uint8_t *r_val)
Definition: omadec.c:132
AVRational::num
int num
Numerator.
Definition: rational.h:59
AV_CH_LAYOUT_STEREO
#define AV_CH_LAYOUT_STEREO
Definition: channel_layout.h:86
OMAContext
Definition: omadec.c:62
OMAContext::read_packet
int(* read_packet)(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:79
avio_rb32
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:800
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
buf
void * buf
Definition: avisynth_c.h:766
AVInputFormat
Definition: avformat.h:640
AV_PKT_FLAG_CORRUPT
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: avcodec.h:1510
nprobe
static int nprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size, const uint8_t *n_val)
Definition: omadec.c:168
OMAContext::encrypted
int encrypted
Definition: omadec.c:64
AVCodecTag
Definition: internal.h:44
ID3v2ExtraMeta
Definition: id3v2.h:57
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:645
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:217
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
AVStream::need_parsing
enum AVStreamParseType need_parsing
Definition: avformat.h:1088
OMAContext::i_size
uint16_t i_size
Definition: omadec.c:67
OMA_CODECID_ATRAC3
@ OMA_CODECID_ATRAC3
Definition: oma.h:33
ID3v2ExtraMetaGEOB::datasize
uint32_t datasize
Definition: id3v2.h:64
ID3v2ExtraMeta::tag
const char * tag
Definition: id3v2.h:58
AVFormatContext
Format I/O context.
Definition: avformat.h:1342
av_log_get_level
int av_log_get_level(void)
Get the current log level.
Definition: log.c:380
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:1017
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:530
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:899
NULL
#define NULL
Definition: coverity.c:32
read_packet
static int read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:314
read_probe
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
OMAContext::s_size
uint16_t s_size
Definition: omadec.c:68
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:446
OMA_CODECID_ATRAC3AL
@ OMA_CODECID_ATRAC3AL
Definition: oma.h:39
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: avcodec.h:4067
AV_CODEC_ID_ATRAC3AL
@ AV_CODEC_ID_ATRAC3AL
Definition: avcodec.h:647
OMAContext::content_start
uint64_t content_start
Definition: omadec.c:63
ff_oma_demuxer
AVInputFormat ff_oma_demuxer
Definition: omadec.c:614
ID3v2_EA3_MAGIC
#define ID3v2_EA3_MAGIC
Definition: oma.h:29
av_get_bits_per_sample
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:1550
ff_oma_chid_to_num_channels
const int ff_oma_chid_to_num_channels[7]
map ATRAC-X channel id to total number of channels
Definition: oma.c:50
avio_rb24
unsigned int avio_rb24(AVIOContext *s)
Definition: aviobuf.c:793
OMA_RPROBE_M_VAL
#define OMA_RPROBE_M_VAL
Definition: omadec.c:130
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:188
ff_codec_get_id
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3146
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:4910
size
int size
Definition: twinvq_data.h:11134
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:92
MKBETAG
#define MKBETAG(a, b, c, d)
Definition: common.h:367
ID3v2ExtraMeta::data
void * data
Definition: id3v2.h:59
OMA_CODECID_MP3
@ OMA_CODECID_MP3
Definition: oma.h:35
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:352
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: avcodec.h:1476
AV_WL16
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
FFMIN
#define FFMIN(a, b)
Definition: common.h:96
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:101
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1483
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
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:73
oma_read_close
static int oma_read_close(AVFormatContext *s)
Definition: omadec.c:82
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1470
AVCodecParameters::block_align
int block_align
Audio only.
Definition: avcodec.h:4074
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
uint8_t
uint8_t
Definition: audio_convert.c:194
len
int len
Definition: vorbis_enc_data.h:452
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:129
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:313
oma_read_header
static int oma_read_header(AVFormatContext *s)
Definition: omadec.c:395
OMAContext::k_size
uint16_t k_size
Definition: omadec.c:65
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:1496
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:870
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:246
ff_pcm_read_seek
int ff_pcm_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: pcm.c:56
avio_rb16
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:785
avformat.h
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen_template.c:38
ID3v2ExtraMetaGEOB::description
uint8_t * description
Definition: id3v2.h:67
channel_layout.h
pkt
static AVPacket pkt
Definition: demuxing_decoding.c:54
AVRational::den
int den
Denominator.
Definition: rational.h:60
OMAContext::e_size
uint16_t e_size
Definition: omadec.c:66
OMA_CODECID_LPCM
@ OMA_CODECID_LPCM
Definition: oma.h:36
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:647
ID3v2ExtraMetaGEOB::data
uint8_t * data
Definition: id3v2.h:68
oma_read_probe
static int oma_read_probe(const AVProbeData *p)
Definition: omadec.c:561
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:795
AVPacket::stream_index
int stream_index
Definition: avcodec.h:1479
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:331
AVCodecParameters::bits_per_coded_sample
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: avcodec.h:3999
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:39
ff_oma_chid_to_native_layout
const uint64_t ff_oma_chid_to_native_layout[7]
map ATRAC-X channel id to internal channel layout
Definition: oma.c:39
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: avcodec.h:3957
AVPacket
This structure stores compressed data.
Definition: avcodec.h:1454
OMAContext::e_val
uint8_t e_val[8]
Definition: omadec.c:75
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:1137
AVPacket::pos
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1497
AVCodecParameters::channel_layout
uint64_t channel_layout
Audio only.
Definition: avcodec.h:4059
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:565
AVCodecParameters::bit_rate
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3986
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:555
OMAContext::m_val
uint8_t m_val[8]
Definition: omadec.c:72
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
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:909
ff_id3v2_parse_chapters
int ff_id3v2_parse_chapters(AVFormatContext *s, ID3v2ExtraMeta **extra_meta)
Create chapters for all CHAP tags found in the ID3v2 header.
Definition: id3v2.c:1193
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:93
int
int
Definition: ffmpeg_filter.c:191
OMAContext::sm_val
uint8_t sm_val[8]
Definition: omadec.c:74
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:94
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:3309
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:358