Libav
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 Libav.
9  *
10  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23  */
24 
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 "oma.h"
51 #include "pcm.h"
52 #include "id3v2.h"
53 
54 
55 static const uint64_t leaf_table[] = {
56  0xd79e8283acea4620, 0x7a9762f445afd0d8,
57  0x354d60a60b8c79f1, 0x584e1cde00b07aee,
58  0x1573cd93da7df623, 0x47f98d79620dd535
59 };
60 
61 typedef struct OMAContext {
62  uint64_t content_start;
63  int encrypted;
64  uint16_t k_size;
65  uint16_t e_size;
66  uint16_t i_size;
67  uint16_t s_size;
68  uint32_t rid;
75  uint8_t iv[8];
76  struct AVDES av_des;
77 } OMAContext;
78 
79 static void hex_log(AVFormatContext *s, int level,
80  const char *name, const uint8_t *value, int len)
81 {
82  char buf[33];
83  len = FFMIN(len, 16);
84  if (av_log_get_level() < level)
85  return;
86  ff_data_to_hex(buf, value, len, 1);
87  buf[len << 1] = '\0';
88  av_log(s, level, "%s: %s\n", name, buf);
89 }
90 
91 static int kset(AVFormatContext *s, const uint8_t *r_val, const uint8_t *n_val,
92  int len)
93 {
94  OMAContext *oc = s->priv_data;
95 
96  if (!r_val && !n_val)
97  return -1;
98 
99  len = FFMIN(len, 16);
100 
101  /* use first 64 bits in the third round again */
102  if (r_val) {
103  if (r_val != oc->r_val) {
104  memset(oc->r_val, 0, 24);
105  memcpy(oc->r_val, r_val, len);
106  }
107  memcpy(&oc->r_val[16], r_val, 8);
108  }
109  if (n_val) {
110  if (n_val != oc->n_val) {
111  memset(oc->n_val, 0, 24);
112  memcpy(oc->n_val, n_val, len);
113  }
114  memcpy(&oc->n_val[16], n_val, 8);
115  }
116 
117  return 0;
118 }
119 
120 #define OMA_RPROBE_M_VAL 48 + 1
121 
122 static int rprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size,
123  const uint8_t *r_val)
124 {
125  OMAContext *oc = s->priv_data;
126  unsigned int pos;
127  struct AVDES av_des;
128 
129  if (!enc_header || !r_val ||
130  size < OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size ||
131  size < OMA_RPROBE_M_VAL)
132  return -1;
133 
134  /* m_val */
135  av_des_init(&av_des, r_val, 192, 1);
136  av_des_crypt(&av_des, oc->m_val, &enc_header[48], 1, NULL, 1);
137 
138  /* s_val */
139  av_des_init(&av_des, oc->m_val, 64, 0);
140  av_des_crypt(&av_des, oc->s_val, NULL, 1, NULL, 0);
141 
142  /* sm_val */
143  pos = OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size;
144  av_des_init(&av_des, oc->s_val, 64, 0);
145  av_des_mac(&av_des, oc->sm_val, &enc_header[pos], (oc->i_size >> 3));
146 
147  pos += oc->i_size;
148 
149  return memcmp(&enc_header[pos], oc->sm_val, 8) ? -1 : 0;
150 }
151 
152 static int nprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size,
153  const uint8_t *n_val)
154 {
155  OMAContext *oc = s->priv_data;
156  uint64_t pos;
157  uint32_t taglen, datalen;
158  struct AVDES av_des;
159 
160  if (!enc_header || !n_val ||
161  size < OMA_ENC_HEADER_SIZE + oc->k_size + 4)
162  return -1;
163 
164  pos = OMA_ENC_HEADER_SIZE + oc->k_size;
165  if (!memcmp(&enc_header[pos], "EKB ", 4))
166  pos += 32;
167 
168  if (size < pos + 44)
169  return -1;
170 
171  if (AV_RB32(&enc_header[pos]) != oc->rid)
172  av_log(s, AV_LOG_DEBUG, "Mismatching RID\n");
173 
174  taglen = AV_RB32(&enc_header[pos + 32]);
175  datalen = AV_RB32(&enc_header[pos + 36]) >> 4;
176 
177  pos += 44;
178  if (size - pos < taglen)
179  return -1;
180 
181  pos += taglen;
182 
183  if (datalen << 4 > size - pos)
184  return -1;
185 
186  av_des_init(&av_des, n_val, 192, 1);
187  while (datalen-- > 0) {
188  av_des_crypt(&av_des, oc->r_val, &enc_header[pos], 2, NULL, 1);
189  kset(s, oc->r_val, NULL, 16);
190  if (!rprobe(s, enc_header, size, oc->r_val))
191  return 0;
192  pos += 16;
193  }
194 
195  return -1;
196 }
197 
199 {
200  OMAContext *oc = s->priv_data;
201  ID3v2ExtraMetaGEOB *geob = NULL;
202  uint8_t *gdata;
203 
204  oc->encrypted = 1;
205  av_log(s, AV_LOG_INFO, "File is encrypted\n");
206 
207  /* find GEOB metadata */
208  while (em) {
209  if (!strcmp(em->tag, "GEOB") &&
210  (geob = em->data) &&
211  (!strcmp(geob->description, "OMG_LSI") ||
212  !strcmp(geob->description, "OMG_BKLSI"))) {
213  break;
214  }
215  em = em->next;
216  }
217  if (!em) {
218  av_log(s, AV_LOG_ERROR, "No encryption header found\n");
219  return AVERROR_INVALIDDATA;
220  }
221 
222  if (geob->datasize < 64) {
223  av_log(s, AV_LOG_ERROR,
224  "Invalid GEOB data size: %"PRIu32"\n", geob->datasize);
225  return AVERROR_INVALIDDATA;
226  }
227 
228  gdata = geob->data;
229 
230  if (AV_RB16(gdata) != 1)
231  av_log(s, AV_LOG_WARNING, "Unknown version in encryption header\n");
232 
233  oc->k_size = AV_RB16(&gdata[2]);
234  oc->e_size = AV_RB16(&gdata[4]);
235  oc->i_size = AV_RB16(&gdata[6]);
236  oc->s_size = AV_RB16(&gdata[8]);
237 
238  if (memcmp(&gdata[OMA_ENC_HEADER_SIZE], "KEYRING ", 12)) {
239  av_log(s, AV_LOG_ERROR, "Invalid encryption header\n");
240  return AVERROR_INVALIDDATA;
241  }
242  if (OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size + 8 > geob->datasize ||
243  OMA_ENC_HEADER_SIZE + 48 > geob->datasize) {
244  av_log(s, AV_LOG_ERROR, "Too little GEOB data\n");
245  return AVERROR_INVALIDDATA;
246  }
247  oc->rid = AV_RB32(&gdata[OMA_ENC_HEADER_SIZE + 28]);
248  av_log(s, AV_LOG_DEBUG, "RID: %.8"PRIx32"\n", oc->rid);
249 
250  memcpy(oc->iv, &header[0x58], 8);
251  hex_log(s, AV_LOG_DEBUG, "IV", oc->iv, 8);
252 
253  hex_log(s, AV_LOG_DEBUG, "CBC-MAC",
254  &gdata[OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size],
255  8);
256 
257  if (s->keylen > 0) {
258  kset(s, s->key, s->key, s->keylen);
259  }
260  if (!memcmp(oc->r_val, (const uint8_t[8]){0}, 8) ||
261  rprobe(s, gdata, geob->datasize, oc->r_val) < 0 &&
262  nprobe(s, gdata, geob->datasize, oc->n_val) < 0) {
263  int i;
264  for (i = 0; i < FF_ARRAY_ELEMS(leaf_table); i += 2) {
265  uint8_t buf[16];
266  AV_WL64(buf, leaf_table[i]);
267  AV_WL64(&buf[8], leaf_table[i + 1]);
268  kset(s, buf, buf, 16);
269  if (!rprobe(s, gdata, geob->datasize, oc->r_val) ||
270  !nprobe(s, gdata, geob->datasize, oc->n_val))
271  break;
272  }
273  if (i >= FF_ARRAY_ELEMS(leaf_table)) {
274  av_log(s, AV_LOG_ERROR, "Invalid key\n");
275  return AVERROR_INVALIDDATA;
276  }
277  }
278 
279  /* e_val */
280  av_des_init(&oc->av_des, oc->m_val, 64, 0);
281  av_des_crypt(&oc->av_des, oc->e_val,
282  &gdata[OMA_ENC_HEADER_SIZE + 40], 1, NULL, 0);
283  hex_log(s, AV_LOG_DEBUG, "EK", oc->e_val, 8);
284 
285  /* init e_val */
286  av_des_init(&oc->av_des, oc->e_val, 64, 1);
287 
288  return 0;
289 }
290 
292 {
293  int ret, framesize, jsflag, samplerate;
294  uint32_t codec_params, channel_id;
295  int16_t eid;
297  uint8_t *edata;
298  AVStream *st;
299  ID3v2ExtraMeta *extra_meta = NULL;
300  OMAContext *oc = s->priv_data;
301 
302  ff_id3v2_read(s, ID3v2_EA3_MAGIC, &extra_meta);
303  ret = avio_read(s->pb, buf, EA3_HEADER_SIZE);
304  if (ret < EA3_HEADER_SIZE)
305  return -1;
306 
307  if (memcmp(buf, ((const uint8_t[]){'E', 'A', '3'}), 3) ||
308  buf[4] != 0 || buf[5] != EA3_HEADER_SIZE) {
309  av_log(s, AV_LOG_ERROR, "Couldn't find the EA3 header !\n");
310  return AVERROR_INVALIDDATA;
311  }
312 
313  oc->content_start = avio_tell(s->pb);
314 
315  /* encrypted file */
316  eid = AV_RB16(&buf[6]);
317  if (eid != -1 && eid != -128 && decrypt_init(s, extra_meta, buf) < 0) {
318  ff_id3v2_free_extra_meta(&extra_meta);
319  return -1;
320  }
321 
322  ff_id3v2_free_extra_meta(&extra_meta);
323 
324  codec_params = AV_RB24(&buf[33]);
325 
326  st = avformat_new_stream(s, NULL);
327  if (!st)
328  return AVERROR(ENOMEM);
329 
330  st->start_time = 0;
332  st->codec->codec_tag = buf[32];
334  st->codec->codec_tag);
335 
336  switch (buf[32]) {
337  case OMA_CODECID_ATRAC3:
338  samplerate = ff_oma_srate_tab[(codec_params >> 13) & 7] * 100;
339  if (!samplerate) {
340  av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
341  return AVERROR_INVALIDDATA;
342  }
343  if (samplerate != 44100)
344  avpriv_request_sample(s, "Sample rate %d", samplerate);
345 
346  framesize = (codec_params & 0x3FF) * 8;
347 
348  /* get stereo coding mode, 1 for joint-stereo */
349  jsflag = (codec_params >> 17) & 1;
350 
351  st->codec->channels = 2;
353  st->codec->sample_rate = samplerate;
354  st->codec->bit_rate = st->codec->sample_rate * framesize * 8 / 1024;
355 
356  /* fake the ATRAC3 extradata
357  * (wav format, makes stream copy to wav work) */
358  st->codec->extradata_size = 14;
360  if (!edata)
361  return AVERROR(ENOMEM);
362 
363  st->codec->extradata = edata;
364  AV_WL16(&edata[0], 1); // always 1
365  AV_WL32(&edata[2], samplerate); // samples rate
366  AV_WL16(&edata[6], jsflag); // coding mode
367  AV_WL16(&edata[8], jsflag); // coding mode
368  AV_WL16(&edata[10], 1); // always 1
369  // AV_WL16(&edata[12], 0); // always 0
370 
371  avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
372  break;
373  case OMA_CODECID_ATRAC3P:
374  channel_id = (codec_params >> 10) & 7;
375  if (!channel_id) {
376  av_log(s, AV_LOG_ERROR,
377  "Invalid ATRAC-X channel id: %"PRIu32"\n", channel_id);
378  return AVERROR_INVALIDDATA;
379  }
380  st->codec->channel_layout = ff_oma_chid_to_native_layout[channel_id - 1];
381  st->codec->channels = ff_oma_chid_to_num_channels[channel_id - 1];
382  framesize = ((codec_params & 0x3FF) * 8) + 8;
383  samplerate = ff_oma_srate_tab[(codec_params >> 13) & 7] * 100;
384  if (!samplerate) {
385  av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
386  return AVERROR_INVALIDDATA;
387  }
388  st->codec->sample_rate = samplerate;
389  st->codec->bit_rate = samplerate * framesize * 8 / 2048;
390  avpriv_set_pts_info(st, 64, 1, samplerate);
391  break;
392  case OMA_CODECID_MP3:
394  framesize = 1024;
395  break;
396  case OMA_CODECID_LPCM:
397  /* PCM 44.1 kHz 16 bit stereo big-endian */
398  st->codec->channels = 2;
400  st->codec->sample_rate = 44100;
401  framesize = 1024;
402  /* bit rate = sample rate x PCM block align (= 4) x 8 */
403  st->codec->bit_rate = st->codec->sample_rate * 32;
406  avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
407  break;
408  default:
409  av_log(s, AV_LOG_ERROR, "Unsupported codec %d!\n", buf[32]);
410  return AVERROR(ENOSYS);
411  }
412 
413  st->codec->block_align = framesize;
414 
415  return 0;
416 }
417 
418 
420 {
421  OMAContext *oc = s->priv_data;
422  int packet_size = s->streams[0]->codec->block_align;
423  int ret = av_get_packet(s->pb, pkt, packet_size);
424 
425  if (ret < packet_size)
426  pkt->flags |= AV_PKT_FLAG_CORRUPT;
427 
428  if (ret < 0)
429  return ret;
430  if (!ret)
431  return AVERROR_EOF;
432 
433  pkt->stream_index = 0;
434 
435  if (oc->encrypted) {
436  /* previous unencrypted block saved in IV for
437  * the next packet (CBC mode) */
438  if (ret == packet_size)
439  av_des_crypt(&oc->av_des, pkt->data, pkt->data,
440  (packet_size >> 3), oc->iv, 1);
441  else
442  memset(oc->iv, 0, 8);
443  }
444 
445  return ret;
446 }
447 
449 {
450  const uint8_t *buf = p->buf;
451  unsigned tag_len = 0;
452 
454  tag_len = ff_id3v2_tag_len(buf);
455 
456  /* This check cannot overflow as tag_len has at most 28 bits */
457  if (p->buf_size < tag_len + 5)
458  /* EA3 header comes late, might be outside of the probe buffer */
459  return tag_len ? AVPROBE_SCORE_EXTENSION : 0;
460 
461  buf += tag_len;
462 
463  if (!memcmp(buf, "EA3", 3) && !buf[4] && buf[5] == EA3_HEADER_SIZE)
464  return AVPROBE_SCORE_MAX;
465  else
466  return 0;
467 }
468 
469 static int oma_read_seek(struct AVFormatContext *s,
470  int stream_index, int64_t timestamp, int flags)
471 {
472  OMAContext *oc = s->priv_data;
473  int err = ff_pcm_read_seek(s, stream_index, timestamp, flags);
474 
475  if (!oc->encrypted)
476  return err;
477 
478  /* readjust IV for CBC */
479  if (err || avio_tell(s->pb) < oc->content_start)
480  goto wipe;
481  if ((err = avio_seek(s->pb, -8, SEEK_CUR)) < 0)
482  goto wipe;
483  if ((err = avio_read(s->pb, oc->iv, 8)) < 8) {
484  if (err >= 0)
485  err = AVERROR_EOF;
486  goto wipe;
487  }
488 
489  return 0;
490 wipe:
491  memset(oc->iv, 0, 8);
492  return err;
493 }
494 
496  .name = "oma",
497  .long_name = NULL_IF_CONFIG_SMALL("Sony OpenMG audio"),
498  .priv_data_size = sizeof(OMAContext),
504  .extensions = "oma,omg,aa3",
505  .codec_tag = (const AVCodecTag* const []){ff_oma_codec_tags, 0},
506 };
static int oma_read_header(AVFormatContext *s)
Definition: omadec.c:291
#define AV_WL64(p, d)
Definition: intreadwrite.h:299
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:122
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
int size
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:1943
int av_des_init(AVDES *d, const uint8_t *key, int key_bits, int decrypt)
Initializes an AVDES context.
Definition: des.c:289
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:129
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:2829
AVInputFormat ff_oma_demuxer
Definition: omadec.c:495
uint8_t r_val[24]
Definition: omadec.c:69
uint8_t sm_val[8]
Definition: omadec.c:73
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
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:335
#define OMA_RPROBE_M_VAL
Definition: omadec.c:120
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:186
uint32_t rid
Definition: omadec.c:68
#define AV_RB24
Definition: intreadwrite.h:64
uint8_t iv[8]
Definition: omadec.c:75
#define ID3v2_EA3_MAGIC
Definition: oma.h:29
#define FF_ARRAY_ELEMS(a)
#define AV_CH_LAYOUT_STEREO
static int kset(AVFormatContext *s, const uint8_t *r_val, const uint8_t *n_val, int len)
Definition: omadec.c:91
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
Definition: avcodec.h:1828
static int oma_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:419
int encrypted
Definition: omadec.c:63
const AVCodecTag ff_oma_codec_tags[]
Definition: oma.c:28
Format I/O context.
Definition: avformat.h:922
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
#define AV_RB32
Definition: intreadwrite.h:130
enum AVStreamParseType need_parsing
Definition: avformat.h:867
#define AV_WL32(p, d)
Definition: intreadwrite.h:255
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1164
const char * name
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:2521
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:990
uint8_t * description
Definition: id3v2.h:65
uint8_t * data
Definition: avcodec.h:973
static int flags
Definition: log.c:44
#define AVERROR_EOF
End of file.
Definition: error.h:51
uint16_t i_size
Definition: omadec.c:66
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:117
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:219
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:2507
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:452
uint8_t * data
Definition: id3v2.h:66
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:2043
#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:150
uint64_t content_start
Definition: omadec.c:62
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:144
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:724
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:168
int av_log_get_level(void)
Get the current log level.
Definition: log.c:185
struct AVDES av_des
Definition: omadec.c:76
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:979
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:1852
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:718
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:398
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:397
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:531
int bit_rate
the average bitrate
Definition: avcodec.h:1114
audio channel layout utility functions
#define FFMIN(a, b)
Definition: common.h:57
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
uint16_t s_size
Definition: omadec.c:67
int ff_pcm_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: pcm.c:26
uint8_t s_val[8]
Definition: omadec.c:72
#define OMA_ENC_HEADER_SIZE
Definition: oma.h:30
void ff_id3v2_read(AVFormatContext *s, const char *magic, ID3v2ExtraMeta **extra_meta)
Read an ID3v2 tag, including supported extra metadata.
Definition: id3v2.c:692
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:544
Stream structure.
Definition: avformat.h:699
#define EA3_HEADER_SIZE
Definition: oma.h:28
NULL
Definition: eval.c:55
uint16_t k_size
Definition: omadec.c:64
#define AV_LOG_INFO
Standard information.
Definition: log.h:134
enum AVMediaType codec_type
Definition: avcodec.h:1058
struct ID3v2ExtraMeta * next
Definition: id3v2.h:58
enum AVCodecID codec_id
Definition: avcodec.h:1067
static int decrypt_init(AVFormatContext *s, ID3v2ExtraMeta *em, uint8_t *header)
Definition: omadec.c:198
int sample_rate
samples per second
Definition: avcodec.h:1791
AVIOContext * pb
I/O context.
Definition: avformat.h:964
const uint64_t ff_oma_chid_to_native_layout[7]
map ATRAC-X channel id to internal channel layout
Definition: oma.c:37
static void hex_log(AVFormatContext *s, int level, const char *name, const uint8_t *value, int len)
Definition: omadec.c:79
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1082
int extradata_size
Definition: avcodec.h:1165
static int read_packet(AVFormatContext *ctx, AVPacket *pkt)
Definition: libcdio.c:114
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:417
static const uint64_t leaf_table[]
Definition: omadec.c:55
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:402
This structure contains the data a format has to probe a file.
Definition: avformat.h:395
static int oma_read_seek(struct AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: omadec.c:469
uint8_t e_val[8]
Definition: omadec.c:74
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:331
uint8_t level
Definition: svq3.c:147
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:404
const uint8_t * key
Definition: avformat.h:1066
const int ff_oma_chid_to_num_channels[7]
map ATRAC-X channel id to total number of channels
Definition: oma.c:48
full parsing and repack
Definition: avformat.h:653
Main libavformat public API header.
uint8_t m_val[8]
Definition: omadec.c:71
int ff_id3v2_match(const uint8_t *buf, const char *magic)
Detect ID3v2 Header.
Definition: id3v2.c:125
int64_t start_time
Decoding: pts of the first frame of the stream, in stream time base.
Definition: avformat.h:749
const char * tag
Definition: id3v2.h:56
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: avcodec.h:1020
static int nprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size, const uint8_t *n_val)
Definition: omadec.c:152
int len
int channels
number of audio channels
Definition: avcodec.h:1792
int ff_id3v2_tag_len(const uint8_t *buf)
Get the length of an ID3v2 tag.
Definition: id3v2.c:138
void * priv_data
Format private data.
Definition: avformat.h:950
uint8_t n_val[24]
Definition: omadec.c:70
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:525
Definition: des.h:27
#define AV_WL16(p, d)
Definition: intreadwrite.h:225
int stream_index
Definition: avcodec.h:975
uint16_t e_size
Definition: omadec.c:65
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:2780
This structure stores compressed data.
Definition: avcodec.h:950
const uint16_t ff_oma_srate_tab[8]
Definition: oma.c:26
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:205
static int oma_read_probe(AVProbeData *p)
Definition: omadec.c:448