FFmpeg  3.4.9
omadec.c
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1 /*
2  * Sony OpenMG (OMA) demuxer
3  *
4  * Copyright (c) 2008, 2013 Maxim Poliakovski
5  * 2008 Benjamin Larsson
6  * 2011 David Goldwich
7  *
8  * This file is part of FFmpeg.
9  *
10  * FFmpeg is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU Lesser General Public
12  * License as published by the Free Software Foundation; either
13  * version 2.1 of the License, or (at your option) any later version.
14  *
15  * FFmpeg is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18  * Lesser General Public License for more details.
19  *
20  * You should have received a copy of the GNU Lesser General Public
21  * License along with FFmpeg; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23  */
24 
25 /**
26  * @file
27  * This is a demuxer for Sony OpenMG Music files
28  *
29  * Known file extensions: ".oma", "aa3"
30  * The format of such files consists of three parts:
31  * - "ea3" header carrying overall info and metadata. Except for starting with
32  * "ea" instead of "ID", it's an ID3v2 header.
33  * - "EA3" header is a Sony-specific header containing information about
34  * the OpenMG file: codec type (usually ATRAC, can also be MP3 or WMA),
35  * codec specific info (packet size, sample rate, channels and so on)
36  * and DRM related info (file encryption, content id).
37  * - Sound data organized in packets follow the EA3 header
38  * (can be encrypted using the Sony DRM!).
39  *
40  * Supported decoders: ATRAC3, ATRAC3+, MP3, LPCM
41  */
42 
43 #include <inttypes.h>
44 
46 #include "avformat.h"
47 #include "internal.h"
48 #include "libavutil/intreadwrite.h"
49 #include "libavutil/des.h"
50 #include "libavutil/mathematics.h"
51 #include "oma.h"
52 #include "pcm.h"
53 #include "id3v2.h"
54 
55 
56 static const uint64_t leaf_table[] = {
57  0xd79e8283acea4620, 0x7a9762f445afd0d8,
58  0x354d60a60b8c79f1, 0x584e1cde00b07aee,
59  0x1573cd93da7df623, 0x47f98d79620dd535
60 };
61 
62 typedef struct OMAContext {
63  uint64_t content_start;
64  int encrypted;
65  uint16_t k_size;
66  uint16_t e_size;
67  uint16_t i_size;
68  uint16_t s_size;
69  uint32_t rid;
76  uint8_t iv[8];
77  struct AVDES *av_des;
78 
80 } OMAContext;
81 
83 {
84  OMAContext *oc = s->priv_data;
85  av_freep(&oc->av_des);
86  return 0;
87 }
88 
89 static void hex_log(AVFormatContext *s, int level,
90  const char *name, const uint8_t *value, int len)
91 {
92  char buf[33];
93  len = FFMIN(len, 16);
94  if (av_log_get_level() < level)
95  return;
96  ff_data_to_hex(buf, value, len, 1);
97  buf[len << 1] = '\0';
98  av_log(s, level, "%s: %s\n", name, buf);
99 }
100 
101 static int kset(AVFormatContext *s, const uint8_t *r_val, const uint8_t *n_val,
102  int len)
103 {
104  OMAContext *oc = s->priv_data;
105 
106  if (!r_val && !n_val)
107  return -1;
108 
109  len = FFMIN(len, 16);
110 
111  /* use first 64 bits in the third round again */
112  if (r_val) {
113  if (r_val != oc->r_val) {
114  memset(oc->r_val, 0, 24);
115  memcpy(oc->r_val, r_val, len);
116  }
117  memcpy(&oc->r_val[16], r_val, 8);
118  }
119  if (n_val) {
120  if (n_val != oc->n_val) {
121  memset(oc->n_val, 0, 24);
122  memcpy(oc->n_val, n_val, len);
123  }
124  memcpy(&oc->n_val[16], n_val, 8);
125  }
126 
127  return 0;
128 }
129 
130 #define OMA_RPROBE_M_VAL 48 + 1
131 
132 static int rprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size,
133  const uint8_t *r_val)
134 {
135  OMAContext *oc = s->priv_data;
136  unsigned int pos;
137  struct AVDES *av_des;
138 
139  if (!enc_header || !r_val ||
140  size < OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size ||
141  size < OMA_RPROBE_M_VAL)
142  return -1;
143 
144  av_des = av_des_alloc();
145  if (!av_des)
146  return AVERROR(ENOMEM);
147 
148  /* m_val */
149  av_des_init(av_des, r_val, 192, 1);
150  av_des_crypt(av_des, oc->m_val, &enc_header[48], 1, NULL, 1);
151 
152  /* s_val */
153  av_des_init(av_des, oc->m_val, 64, 0);
154  av_des_crypt(av_des, oc->s_val, NULL, 1, NULL, 0);
155 
156  /* sm_val */
157  pos = OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size;
158  av_des_init(av_des, oc->s_val, 64, 0);
159  av_des_mac(av_des, oc->sm_val, &enc_header[pos], (oc->i_size >> 3));
160 
161  pos += oc->i_size;
162 
163  av_free(av_des);
164 
165  return memcmp(&enc_header[pos], oc->sm_val, 8) ? -1 : 0;
166 }
167 
168 static int nprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size,
169  const uint8_t *n_val)
170 {
171  OMAContext *oc = s->priv_data;
172  uint64_t pos;
173  uint32_t taglen, datalen;
174  struct AVDES *av_des;
175 
176  if (!enc_header || !n_val ||
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) {
242  av_log(s, AV_LOG_ERROR,
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)
324  pkt->flags |= AV_PKT_FLAG_CORRUPT;
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)
343  av_des_crypt(oc->av_des, pkt->data, pkt->data,
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)
375  pkt->flags |= AV_PKT_FLAG_CORRUPT;
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;
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");
457  ret = AVERROR_INVALIDDATA;
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) {
491  av_log(s, AV_LOG_ERROR,
492  "Invalid ATRAC-X channel id: %"PRIu32"\n", channel_id);
493  ret = AVERROR_INVALIDDATA;
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");
502  ret = AVERROR_INVALIDDATA;
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 
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 };
const char * name
Definition: avisynth_c.h:775
static int oma_read_header(AVFormatContext *s)
Definition: omadec.c:395
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:768
void * data
Definition: id3v2.h:57
static int rprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size, const uint8_t *r_val)
Definition: omadec.c:132
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
void av_des_crypt(AVDES *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt)
Encrypts / decrypts using the DES algorithm.
Definition: des.c:322
int size
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3067
static int aal_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:352
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1699
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:4756
AVInputFormat ff_oma_demuxer
Definition: omadec.c:614
uint8_t r_val[24]
Definition: omadec.c:70
uint8_t sm_val[8]
Definition: omadec.c:74
#define avpriv_request_sample(...)
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
#define OMA_RPROBE_M_VAL
Definition: omadec.c:130
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:4152
int num
Numerator.
Definition: rational.h:59
uint32_t datasize
Definition: id3v2.h:62
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:244
uint32_t rid
Definition: omadec.c:69
#define AV_RB24
Definition: intreadwrite.h:64
uint8_t iv[8]
Definition: omadec.c:76
#define ID3v2_EA3_MAGIC
Definition: oma.h:29
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:329
static AVPacket pkt
#define AV_CH_LAYOUT_STEREO
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:774
static int kset(AVFormatContext *s, const uint8_t *r_val, const uint8_t *n_val, int len)
Definition: omadec.c:101
static int oma_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:555
int encrypted
Definition: omadec.c:64
const AVCodecTag ff_oma_codec_tags[]
Definition: oma.c:28
Format I/O context.
Definition: avformat.h:1349
#define ID3v2_HEADER_SIZE
Definition: id3v2.h:30
uint8_t
int ff_id3v2_parse_chapters(AVFormatContext *s, ID3v2ExtraMeta **extra_meta)
Create chapters for all CHAP tags found in the ID3v2 header.
Definition: id3v2.c:1189
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:789
#define AV_RB32
Definition: intreadwrite.h:130
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1697
enum AVStreamParseType need_parsing
Definition: avformat.h:1081
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4383
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1417
uint8_t * description
Definition: id3v2.h:65
uint8_t * data
Definition: avcodec.h:1679
static int flags
Definition: log.c:57
uint32_t tag
Definition: movenc.c:1414
#define AVERROR_EOF
End of file.
Definition: error.h:55
uint16_t i_size
Definition: omadec.c:67
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
Allocate and read the payload of a packet and initialize its fields with default values.
Definition: utils.c:292
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:556
static const uint8_t header[24]
Definition: sdr2.c:67
full parsing and repack with timestamp and position generation by parser for raw this assumes that ea...
Definition: avformat.h:814
uint64_t channel_layout
Audio only.
Definition: avcodec.h:4254
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:636
uint8_t * data
Definition: id3v2.h:66
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:4181
#define AV_WL64(p, v)
Definition: intreadwrite.h:445
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:1709
int(* read_packet)(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:79
#define AV_RB16
Definition: intreadwrite.h:53
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:181
uint64_t content_start
Definition: omadec.c:63
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
int av_des_init(AVDES *d, const uint8_t *key, int key_bits, av_unused int decrypt)
Definition: des.c:278
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:4148
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1133
int av_log_get_level(void)
Get the current log level.
Definition: log.c:386
#define fail()
Definition: checkasm.h:109
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1685
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:464
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:463
int block_align
Audio only.
Definition: avcodec.h:4269
audio channel layout utility functions
int ff_alloc_extradata(AVCodecParameters *par, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0...
Definition: utils.c:3230
unsigned int avio_rb24(AVIOContext *s)
Definition: aviobuf.c:782
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
#define FFMIN(a, b)
Definition: common.h:96
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
uint16_t s_size
Definition: omadec.c:68
int ff_pcm_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: pcm.c:45
uint8_t s_val[8]
Definition: omadec.c:73
#define OMA_ENC_HEADER_SIZE
Definition: oma.h:30
#define FF_ARRAY_ELEMS(a)
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:528
#define EA3_HEADER_SIZE
Definition: oma.h:28
Stream structure.
Definition: avformat.h:889
AVDES * av_des_alloc(void)
Allocate an AVDES context.
Definition: des.c:273
uint16_t k_size
Definition: omadec.c:65
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
struct ID3v2ExtraMeta * next
Definition: id3v2.h:58
static int decrypt_init(AVFormatContext *s, ID3v2ExtraMeta *em, uint8_t *header)
Definition: omadec.c:217
AVIOContext * pb
I/O context.
Definition: avformat.h:1391
const uint64_t ff_oma_chid_to_native_layout[7]
map ATRAC-X channel id to internal channel layout
Definition: oma.c:39
static void hex_log(AVFormatContext *s, int level, const char *name, const uint8_t *value, int len)
Definition: omadec.c:89
void * buf
Definition: avisynth_c.h:690
double value
Definition: eval.c:91
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:487
void av_des_mac(AVDES *d, uint8_t *dst, const uint8_t *src, int count)
Calculates CBC-MAC using the DES algorithm.
Definition: des.c:328
static const uint64_t leaf_table[]
Definition: omadec.c:56
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:471
This structure contains the data a format has to probe a file.
Definition: avformat.h:461
static int oma_read_seek(struct AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: omadec.c:582
static int64_t pts
Global timestamp for the audio frames.
uint8_t e_val[8]
Definition: omadec.c:75
uint8_t level
Definition: svq3.c:207
int sample_rate
Audio only.
Definition: avcodec.h:4262
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:473
const uint8_t * key
Definition: avformat.h:1503
const int ff_oma_chid_to_num_channels[7]
map ATRAC-X channel id to total number of channels
Definition: oma.c:50
Main libavformat public API header.
int
uint8_t m_val[8]
Definition: omadec.c:72
int ff_id3v2_match(const uint8_t *buf, const char *magic)
Detect ID3v2 Header.
Definition: id3v2.c:141
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
Definition: avformat.h:936
const char * tag
Definition: id3v2.h:56
#define AV_WL16(p, v)
Definition: intreadwrite.h:417
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:1127
int den
Denominator.
Definition: rational.h:60
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: avcodec.h:1712
#define MKBETAG(a, b, c, d)
Definition: common.h:343
static int nprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size, const uint8_t *n_val)
Definition: omadec.c:168
#define av_free(p)
int len
int ff_id3v2_tag_len(const uint8_t *buf)
Get the length of an ID3v2 tag.
Definition: id3v2.c:154
void * priv_data
Format private data.
Definition: avformat.h:1377
uint8_t n_val[24]
Definition: omadec.c:71
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: avcodec.h:4194
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:4166
int channels
Audio only.
Definition: avcodec.h:4258
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1678
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:664
Definition: des.h:33
struct AVDES * av_des
Definition: omadec.c:77
AVCodecParameters * codecpar
Definition: avformat.h:1252
static int oma_read_close(AVFormatContext *s)
Definition: omadec.c:82
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:356
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:4156
int stream_index
Definition: avcodec.h:1681
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:926
uint16_t e_size
Definition: omadec.c:66
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4707
This structure stores compressed data.
Definition: avcodec.h:1656
const uint16_t ff_oma_srate_tab[8]
Definition: oma.c:26
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1672
static int oma_read_probe(AVProbeData *p)
Definition: omadec.c:561
#define AV_WL32(p, v)
Definition: intreadwrite.h:431