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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 
82 static void hex_log(AVFormatContext *s, int level,
83  const char *name, const uint8_t *value, int len)
84 {
85  char buf[33];
86  len = FFMIN(len, 16);
87  if (av_log_get_level() < level)
88  return;
89  ff_data_to_hex(buf, value, len, 1);
90  buf[len << 1] = '\0';
91  av_log(s, level, "%s: %s\n", name, buf);
92 }
93 
94 static int kset(AVFormatContext *s, const uint8_t *r_val, const uint8_t *n_val,
95  int len)
96 {
97  OMAContext *oc = s->priv_data;
98 
99  if (!r_val && !n_val)
100  return -1;
101 
102  len = FFMIN(len, 16);
103 
104  /* use first 64 bits in the third round again */
105  if (r_val) {
106  if (r_val != oc->r_val) {
107  memset(oc->r_val, 0, 24);
108  memcpy(oc->r_val, r_val, len);
109  }
110  memcpy(&oc->r_val[16], r_val, 8);
111  }
112  if (n_val) {
113  if (n_val != oc->n_val) {
114  memset(oc->n_val, 0, 24);
115  memcpy(oc->n_val, n_val, len);
116  }
117  memcpy(&oc->n_val[16], n_val, 8);
118  }
119 
120  return 0;
121 }
122 
123 #define OMA_RPROBE_M_VAL 48 + 1
124 
125 static int rprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size,
126  const uint8_t *r_val)
127 {
128  OMAContext *oc = s->priv_data;
129  unsigned int pos;
130  struct AVDES *av_des;
131 
132  if (!enc_header || !r_val ||
133  size < OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size ||
134  size < OMA_RPROBE_M_VAL)
135  return -1;
136 
137  av_des = av_des_alloc();
138  if (!av_des)
139  return AVERROR(ENOMEM);
140 
141  /* m_val */
142  av_des_init(av_des, r_val, 192, 1);
143  av_des_crypt(av_des, oc->m_val, &enc_header[48], 1, NULL, 1);
144 
145  /* s_val */
146  av_des_init(av_des, oc->m_val, 64, 0);
147  av_des_crypt(av_des, oc->s_val, NULL, 1, NULL, 0);
148 
149  /* sm_val */
150  pos = OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size;
151  av_des_init(av_des, oc->s_val, 64, 0);
152  av_des_mac(av_des, oc->sm_val, &enc_header[pos], (oc->i_size >> 3));
153 
154  pos += oc->i_size;
155 
156  av_free(av_des);
157 
158  return memcmp(&enc_header[pos], oc->sm_val, 8) ? -1 : 0;
159 }
160 
161 static int nprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size,
162  const uint8_t *n_val)
163 {
164  OMAContext *oc = s->priv_data;
165  uint64_t pos;
166  uint32_t taglen, datalen;
167  struct AVDES *av_des;
168 
169  if (!enc_header || !n_val ||
171  return -1;
172 
173  pos = OMA_ENC_HEADER_SIZE + oc->k_size;
174  if (!memcmp(&enc_header[pos], "EKB ", 4))
175  pos += 32;
176 
177  if (size < pos + 44)
178  return -1;
179 
180  if (AV_RB32(&enc_header[pos]) != oc->rid)
181  av_log(s, AV_LOG_DEBUG, "Mismatching RID\n");
182 
183  taglen = AV_RB32(&enc_header[pos + 32]);
184  datalen = AV_RB32(&enc_header[pos + 36]) >> 4;
185 
186  pos += 44LL + taglen;
187 
188  if (pos + (((uint64_t)datalen) << 4) > size)
189  return -1;
190 
191  av_des = av_des_alloc();
192  if (!av_des)
193  return AVERROR(ENOMEM);
194 
195  av_des_init(av_des, n_val, 192, 1);
196  while (datalen-- > 0) {
197  av_des_crypt(av_des, oc->r_val, &enc_header[pos], 2, NULL, 1);
198  kset(s, oc->r_val, NULL, 16);
199  if (!rprobe(s, enc_header, size, oc->r_val)) {
200  av_free(av_des);
201  return 0;
202  }
203  pos += 16;
204  }
205 
206  av_free(av_des);
207  return -1;
208 }
209 
211 {
212  OMAContext *oc = s->priv_data;
213  ID3v2ExtraMetaGEOB *geob = NULL;
214  uint8_t *gdata;
215 
216  oc->encrypted = 1;
217  av_log(s, AV_LOG_INFO, "File is encrypted\n");
218 
219  /* find GEOB metadata */
220  while (em) {
221  if (!strcmp(em->tag, "GEOB") &&
222  (geob = em->data) &&
223  (!strcmp(geob->description, "OMG_LSI") ||
224  !strcmp(geob->description, "OMG_BKLSI"))) {
225  break;
226  }
227  em = em->next;
228  }
229  if (!em) {
230  av_log(s, AV_LOG_ERROR, "No encryption header found\n");
231  return AVERROR_INVALIDDATA;
232  }
233 
234  if (geob->datasize < 64) {
235  av_log(s, AV_LOG_ERROR,
236  "Invalid GEOB data size: %"PRIu32"\n", geob->datasize);
237  return AVERROR_INVALIDDATA;
238  }
239 
240  gdata = geob->data;
241 
242  if (AV_RB16(gdata) != 1)
243  av_log(s, AV_LOG_WARNING, "Unknown version in encryption header\n");
244 
245  oc->k_size = AV_RB16(&gdata[2]);
246  oc->e_size = AV_RB16(&gdata[4]);
247  oc->i_size = AV_RB16(&gdata[6]);
248  oc->s_size = AV_RB16(&gdata[8]);
249 
250  if (memcmp(&gdata[OMA_ENC_HEADER_SIZE], "KEYRING ", 12)) {
251  av_log(s, AV_LOG_ERROR, "Invalid encryption header\n");
252  return AVERROR_INVALIDDATA;
253  }
254  if (OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size + 8 > geob->datasize ||
255  OMA_ENC_HEADER_SIZE + 48 > geob->datasize) {
256  av_log(s, AV_LOG_ERROR, "Too little GEOB data\n");
257  return AVERROR_INVALIDDATA;
258  }
259  oc->rid = AV_RB32(&gdata[OMA_ENC_HEADER_SIZE + 28]);
260  av_log(s, AV_LOG_DEBUG, "RID: %.8"PRIx32"\n", oc->rid);
261 
262  memcpy(oc->iv, &header[0x58], 8);
263  hex_log(s, AV_LOG_DEBUG, "IV", oc->iv, 8);
264 
265  hex_log(s, AV_LOG_DEBUG, "CBC-MAC",
266  &gdata[OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size],
267  8);
268 
269  if (s->keylen > 0) {
270  kset(s, s->key, s->key, s->keylen);
271  }
272  if (!memcmp(oc->r_val, (const uint8_t[8]){0}, 8) ||
273  rprobe(s, gdata, geob->datasize, oc->r_val) < 0 &&
274  nprobe(s, gdata, geob->datasize, oc->n_val) < 0) {
275  int i;
276  for (i = 0; i < FF_ARRAY_ELEMS(leaf_table); i += 2) {
277  uint8_t buf[16];
278  AV_WL64(buf, leaf_table[i]);
279  AV_WL64(&buf[8], leaf_table[i + 1]);
280  kset(s, buf, buf, 16);
281  if (!rprobe(s, gdata, geob->datasize, oc->r_val) ||
282  !nprobe(s, gdata, geob->datasize, oc->n_val))
283  break;
284  }
285  if (i >= FF_ARRAY_ELEMS(leaf_table)) {
286  av_log(s, AV_LOG_ERROR, "Invalid key\n");
287  return AVERROR_INVALIDDATA;
288  }
289  }
290 
291  oc->av_des = av_des_alloc();
292  if (!oc->av_des)
293  return AVERROR(ENOMEM);
294 
295  /* e_val */
296  av_des_init(oc->av_des, oc->m_val, 64, 0);
297  av_des_crypt(oc->av_des, oc->e_val,
298  &gdata[OMA_ENC_HEADER_SIZE + 40], 1, NULL, 0);
299  hex_log(s, AV_LOG_DEBUG, "EK", oc->e_val, 8);
300 
301  /* init e_val */
302  av_des_init(oc->av_des, oc->e_val, 64, 1);
303 
304  return 0;
305 }
306 
308 {
309  OMAContext *oc = s->priv_data;
310  AVStream *st = s->streams[0];
311  int packet_size = st->codecpar->block_align;
312  int byte_rate = st->codecpar->bit_rate >> 3;
313  int64_t pos = avio_tell(s->pb);
314  int ret = av_get_packet(s->pb, pkt, packet_size);
315 
316  if (ret < packet_size)
317  pkt->flags |= AV_PKT_FLAG_CORRUPT;
318 
319  if (ret < 0)
320  return ret;
321  if (!ret)
322  return AVERROR_EOF;
323 
324  pkt->stream_index = 0;
325 
326  if (pos >= oc->content_start && byte_rate > 0) {
327  pkt->pts =
328  pkt->dts = av_rescale(pos - oc->content_start, st->time_base.den,
329  byte_rate * (int64_t)st->time_base.num);
330  }
331 
332  if (oc->encrypted) {
333  /* previous unencrypted block saved in IV for
334  * the next packet (CBC mode) */
335  if (ret == packet_size)
336  av_des_crypt(oc->av_des, pkt->data, pkt->data,
337  (packet_size >> 3), oc->iv, 1);
338  else
339  memset(oc->iv, 0, 8);
340  }
341 
342  return ret;
343 }
344 
346 {
347  int64_t pos = avio_tell(s->pb);
348  int ret, pts;
349  int packet_size;
350  unsigned tag;
351 
352  if (avio_feof(s->pb))
353  return AVERROR_EOF;
354 
355  tag = avio_rb24(s->pb);
356  if (tag == 0)
357  return AVERROR_EOF;
358  else if (tag != MKBETAG(0,'B','L','K'))
359  return AVERROR_INVALIDDATA;
360 
361  avio_skip(s->pb, 1);
362  packet_size = avio_rb16(s->pb);
363  avio_skip(s->pb, 2);
364  pts = avio_rb32(s->pb);
365  avio_skip(s->pb, 12);
366  ret = av_get_packet(s->pb, pkt, packet_size);
367  if (ret < packet_size)
368  pkt->flags |= AV_PKT_FLAG_CORRUPT;
369 
370  if (ret < 0)
371  return ret;
372  if (!ret)
373  return AVERROR_EOF;
374 
375  pkt->stream_index = 0;
376  pkt->pos = pos;
378  pkt->duration = 1024;
379  pkt->pts = pts * 1024LL;
380  } else {
381  pkt->duration = 2048;
382  pkt->pts = pts * 2048LL;
383  }
384 
385  return ret;
386 }
387 
389 {
390  int ret, framesize, jsflag, samplerate;
391  uint32_t codec_params, channel_id;
392  int16_t eid;
394  uint8_t *edata;
395  AVStream *st;
396  ID3v2ExtraMeta *extra_meta = NULL;
397  OMAContext *oc = s->priv_data;
398 
399  ff_id3v2_read(s, ID3v2_EA3_MAGIC, &extra_meta, 0);
400  ret = avio_read(s->pb, buf, EA3_HEADER_SIZE);
401  if (ret < EA3_HEADER_SIZE)
402  return -1;
403 
404  if (memcmp(buf, ((const uint8_t[]){'E', 'A', '3'}), 3) ||
405  buf[4] != 0 || buf[5] != EA3_HEADER_SIZE) {
406  av_log(s, AV_LOG_ERROR, "Couldn't find the EA3 header !\n");
407  return AVERROR_INVALIDDATA;
408  }
409 
410  oc->content_start = avio_tell(s->pb);
411 
412  /* encrypted file */
413  eid = AV_RB16(&buf[6]);
414  if (eid != -1 && eid != -128 && decrypt_init(s, extra_meta, buf) < 0) {
415  ff_id3v2_free_extra_meta(&extra_meta);
416  return -1;
417  }
418 
419  ff_id3v2_free_extra_meta(&extra_meta);
420 
421  codec_params = AV_RB24(&buf[33]);
422 
423  st = avformat_new_stream(s, NULL);
424  if (!st)
425  return AVERROR(ENOMEM);
426 
427  st->start_time = 0;
429  st->codecpar->codec_tag = buf[32];
431  st->codecpar->codec_tag);
432 
433  oc->read_packet = read_packet;
434 
435  switch (buf[32]) {
436  case OMA_CODECID_ATRAC3:
437  samplerate = ff_oma_srate_tab[(codec_params >> 13) & 7] * 100;
438  if (!samplerate) {
439  av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
440  return AVERROR_INVALIDDATA;
441  }
442  if (samplerate != 44100)
443  avpriv_request_sample(s, "Sample rate %d", samplerate);
444 
445  framesize = (codec_params & 0x3FF) * 8;
446 
447  /* get stereo coding mode, 1 for joint-stereo */
448  jsflag = (codec_params >> 17) & 1;
449 
450  st->codecpar->channels = 2;
452  st->codecpar->sample_rate = samplerate;
453  st->codecpar->bit_rate = st->codecpar->sample_rate * framesize / (1024 / 8);
454 
455  /* fake the ATRAC3 extradata
456  * (wav format, makes stream copy to wav work) */
457  if (ff_alloc_extradata(st->codecpar, 14))
458  return AVERROR(ENOMEM);
459 
460  edata = st->codecpar->extradata;
461  AV_WL16(&edata[0], 1); // always 1
462  AV_WL32(&edata[2], samplerate); // samples rate
463  AV_WL16(&edata[6], jsflag); // coding mode
464  AV_WL16(&edata[8], jsflag); // coding mode
465  AV_WL16(&edata[10], 1); // always 1
466  // AV_WL16(&edata[12], 0); // always 0
467 
468  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
469  break;
470  case OMA_CODECID_ATRAC3P:
471  channel_id = (codec_params >> 10) & 7;
472  if (!channel_id) {
473  av_log(s, AV_LOG_ERROR,
474  "Invalid ATRAC-X channel id: %"PRIu32"\n", channel_id);
475  return AVERROR_INVALIDDATA;
476  }
478  st->codecpar->channels = ff_oma_chid_to_num_channels[channel_id - 1];
479  framesize = ((codec_params & 0x3FF) * 8) + 8;
480  samplerate = ff_oma_srate_tab[(codec_params >> 13) & 7] * 100;
481  if (!samplerate) {
482  av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
483  return AVERROR_INVALIDDATA;
484  }
485  st->codecpar->sample_rate = samplerate;
486  st->codecpar->bit_rate = samplerate * framesize / (2048 / 8);
487  avpriv_set_pts_info(st, 64, 1, samplerate);
488  break;
489  case OMA_CODECID_MP3:
491  framesize = 1024;
492  break;
493  case OMA_CODECID_LPCM:
494  /* PCM 44.1 kHz 16 bit stereo big-endian */
495  st->codecpar->channels = 2;
497  st->codecpar->sample_rate = 44100;
498  framesize = 1024;
499  /* bit rate = sample rate x PCM block align (= 4) x 8 */
500  st->codecpar->bit_rate = st->codecpar->sample_rate * 32;
503  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
504  break;
506  st->codecpar->channels = 2;
508  st->codecpar->sample_rate = 44100;
509  avpriv_set_pts_info(st, 64, 1, 44100);
511  framesize = 4096;
512  break;
515  st->codecpar->channels = 2;
516  st->codecpar->sample_rate = 44100;
517  avpriv_set_pts_info(st, 64, 1, 44100);
519  framesize = 4096;
520  break;
521  default:
522  av_log(s, AV_LOG_ERROR, "Unsupported codec %d!\n", buf[32]);
523  return AVERROR(ENOSYS);
524  }
525 
526  st->codecpar->block_align = framesize;
527 
528  return 0;
529 }
530 
532 {
533  OMAContext *oc = s->priv_data;
534  return oc->read_packet(s, pkt);
535 }
536 
538 {
539  const uint8_t *buf = p->buf;
540  unsigned tag_len = 0;
541 
543  tag_len = ff_id3v2_tag_len(buf);
544 
545  /* This check cannot overflow as tag_len has at most 28 bits */
546  if (p->buf_size < tag_len + 5)
547  /* EA3 header comes late, might be outside of the probe buffer */
548  return tag_len ? AVPROBE_SCORE_EXTENSION/2 : 0;
549 
550  buf += tag_len;
551 
552  if (!memcmp(buf, "EA3", 3) && !buf[4] && buf[5] == EA3_HEADER_SIZE)
553  return AVPROBE_SCORE_MAX;
554  else
555  return 0;
556 }
557 
558 static int oma_read_seek(struct AVFormatContext *s,
559  int stream_index, int64_t timestamp, int flags)
560 {
561  OMAContext *oc = s->priv_data;
562  AVStream *st = s->streams[0];
563  int64_t err;
564 
567  return -1;
568 
569  err = ff_pcm_read_seek(s, stream_index, timestamp, flags);
570  if (!oc->encrypted)
571  return err;
572 
573  /* readjust IV for CBC */
574  if (err || avio_tell(s->pb) < oc->content_start)
575  goto wipe;
576  if ((err = avio_seek(s->pb, -8, SEEK_CUR)) < 0)
577  goto wipe;
578  if ((err = avio_read(s->pb, oc->iv, 8)) < 8) {
579  if (err >= 0)
580  err = AVERROR_EOF;
581  goto wipe;
582  }
583 
584  return 0;
585 wipe:
586  memset(oc->iv, 0, 8);
587  return err;
588 }
589 
591 {
592  OMAContext *oc = s->priv_data;
593  av_free(oc->av_des);
594  return 0;
595 }
596 
598  .name = "oma",
599  .long_name = NULL_IF_CONFIG_SMALL("Sony OpenMG audio"),
600  .priv_data_size = sizeof(OMAContext),
607  .extensions = "oma,omg,aa3",
608  .codec_tag = (const AVCodecTag* const []){ff_oma_codec_tags, 0},
609 };
static int oma_read_header(AVFormatContext *s)
Definition: omadec.c:388
#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:125
#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
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3049
static int aal_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:345
#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:1677
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:4727
AVInputFormat ff_oma_demuxer
Definition: omadec.c:597
uint8_t r_val[24]
Definition: omadec.c:70
uint8_t sm_val[8]
Definition: omadec.c:74
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:123
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:4074
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:235
uint32_t rid
Definition: omadec.c:69
uint8_t iv[8]
Definition: omadec.c:76
#define ID3v2_EA3_MAGIC
Definition: oma.h:29
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:318
static AVPacket pkt
#define AV_CH_LAYOUT_STEREO
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:759
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
Definition: bytestream.h:87
static int kset(AVFormatContext *s, const uint8_t *r_val, const uint8_t *n_val, int len)
Definition: omadec.c:94
static int oma_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:531
int encrypted
Definition: omadec.c:64
const AVCodecTag ff_oma_codec_tags[]
Definition: oma.c:28
Format I/O context.
Definition: avformat.h:1349
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
#define ID3v2_HEADER_SIZE
Definition: id3v2.h:30
uint8_t
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:774
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1675
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:4357
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:87
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1417
uint8_t * description
Definition: id3v2.h:65
uint8_t * data
Definition: avcodec.h:1657
static int flags
Definition: log.c:57
uint32_t tag
Definition: movenc.c:1446
#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:289
ptrdiff_t size
Definition: opengl_enc.c:101
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:527
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:4176
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:621
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:4103
#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:1662
#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:179
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:4070
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1110
int av_log_get_level(void)
Get the current log level.
Definition: log.c:386
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1663
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:4191
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:3212
unsigned int avio_rb24(AVIOContext *s)
Definition: aviobuf.c:767
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
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:109
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:509
#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
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_RB24
Definition: bytestream.h:87
static int decrypt_init(AVFormatContext *s, ID3v2ExtraMeta *em, uint8_t *header)
Definition: omadec.c:210
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:82
void * buf
Definition: avisynth_c.h:690
#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:558
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:4184
#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
static int read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:307
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
int(* read_packet)(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:79
#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 and chapters.
Definition: id3v2.c:1104
int den
Denominator.
Definition: rational.h:60
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: avcodec.h:1690
#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:161
#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:4116
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:4088
int channels
Audio only.
Definition: avcodec.h:4180
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1656
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
static int oma_read_close(AVFormatContext *s)
Definition: omadec.c:590
AVCodecParameters * codecpar
Definition: avformat.h:1252
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:345
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:4078
int stream_index
Definition: avcodec.h:1659
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:4678
This structure stores compressed data.
Definition: avcodec.h:1634
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:1650
static int oma_read_probe(AVProbeData *p)
Definition: omadec.c:537
#define AV_WL32(p, v)
Definition: intreadwrite.h:431
const char * name
Definition: opengl_enc.c:103