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 "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 } OMAContext;
79 
80 static void hex_log(AVFormatContext *s, int level,
81  const char *name, const uint8_t *value, int len)
82 {
83  char buf[33];
84  len = FFMIN(len, 16);
85  if (av_log_get_level() < level)
86  return;
87  ff_data_to_hex(buf, value, len, 1);
88  buf[len << 1] = '\0';
89  av_log(s, level, "%s: %s\n", name, buf);
90 }
91 
92 static int kset(AVFormatContext *s, const uint8_t *r_val, const uint8_t *n_val,
93  int len)
94 {
95  OMAContext *oc = s->priv_data;
96 
97  if (!r_val && !n_val)
98  return -1;
99 
100  len = FFMIN(len, 16);
101 
102  /* use first 64 bits in the third round again */
103  if (r_val) {
104  if (r_val != oc->r_val) {
105  memset(oc->r_val, 0, 24);
106  memcpy(oc->r_val, r_val, len);
107  }
108  memcpy(&oc->r_val[16], r_val, 8);
109  }
110  if (n_val) {
111  if (n_val != oc->n_val) {
112  memset(oc->n_val, 0, 24);
113  memcpy(oc->n_val, n_val, len);
114  }
115  memcpy(&oc->n_val[16], n_val, 8);
116  }
117 
118  return 0;
119 }
120 
121 #define OMA_RPROBE_M_VAL 48 + 1
122 
123 static int rprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size,
124  const uint8_t *r_val)
125 {
126  OMAContext *oc = s->priv_data;
127  unsigned int pos;
128  struct AVDES *av_des;
129 
130  if (!enc_header || !r_val ||
131  size < OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size ||
132  size < OMA_RPROBE_M_VAL)
133  return -1;
134 
135  av_des = av_des_alloc();
136  if (!av_des)
137  return AVERROR(ENOMEM);
138 
139  /* m_val */
140  av_des_init(av_des, r_val, 192, 1);
141  av_des_crypt(av_des, oc->m_val, &enc_header[48], 1, NULL, 1);
142 
143  /* s_val */
144  av_des_init(av_des, oc->m_val, 64, 0);
145  av_des_crypt(av_des, oc->s_val, NULL, 1, NULL, 0);
146 
147  /* sm_val */
148  pos = OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size;
149  av_des_init(av_des, oc->s_val, 64, 0);
150  av_des_mac(av_des, oc->sm_val, &enc_header[pos], (oc->i_size >> 3));
151 
152  pos += oc->i_size;
153 
154  av_free(av_des);
155 
156  return memcmp(&enc_header[pos], oc->sm_val, 8) ? -1 : 0;
157 }
158 
159 static int nprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size,
160  const uint8_t *n_val)
161 {
162  OMAContext *oc = s->priv_data;
163  uint64_t pos;
164  uint32_t taglen, datalen;
165  struct AVDES *av_des;
166 
167  if (!enc_header || !n_val ||
168  size < OMA_ENC_HEADER_SIZE + oc->k_size + 4)
169  return -1;
170 
171  pos = OMA_ENC_HEADER_SIZE + oc->k_size;
172  if (!memcmp(&enc_header[pos], "EKB ", 4))
173  pos += 32;
174 
175  if (size < pos + 44)
176  return -1;
177 
178  if (AV_RB32(&enc_header[pos]) != oc->rid)
179  av_log(s, AV_LOG_DEBUG, "Mismatching RID\n");
180 
181  taglen = AV_RB32(&enc_header[pos + 32]);
182  datalen = AV_RB32(&enc_header[pos + 36]) >> 4;
183 
184  pos += 44;
185  if (size - pos < taglen)
186  return -1;
187 
188  pos += taglen;
189 
190  if (datalen << 4 > size - pos)
191  return -1;
192 
193  av_des = av_des_alloc();
194  if (!av_des)
195  return AVERROR(ENOMEM);
196 
197  av_des_init(av_des, n_val, 192, 1);
198  while (datalen-- > 0) {
199  av_des_crypt(av_des, oc->r_val, &enc_header[pos], 2, NULL, 1);
200  kset(s, oc->r_val, NULL, 16);
201  if (!rprobe(s, enc_header, size, oc->r_val)) {
202  av_free(av_des);
203  return 0;
204  }
205  pos += 16;
206  }
207 
208  av_free(av_des);
209  return -1;
210 }
211 
213 {
214  OMAContext *oc = s->priv_data;
215  ID3v2ExtraMetaGEOB *geob = NULL;
216  uint8_t *gdata;
217 
218  oc->encrypted = 1;
219  av_log(s, AV_LOG_INFO, "File is encrypted\n");
220 
221  /* find GEOB metadata */
222  while (em) {
223  if (!strcmp(em->tag, "GEOB") &&
224  (geob = em->data) &&
225  (!strcmp(geob->description, "OMG_LSI") ||
226  !strcmp(geob->description, "OMG_BKLSI"))) {
227  break;
228  }
229  em = em->next;
230  }
231  if (!em) {
232  av_log(s, AV_LOG_ERROR, "No encryption header found\n");
233  return AVERROR_INVALIDDATA;
234  }
235 
236  if (geob->datasize < 64) {
237  av_log(s, AV_LOG_ERROR,
238  "Invalid GEOB data size: %"PRIu32"\n", geob->datasize);
239  return AVERROR_INVALIDDATA;
240  }
241 
242  gdata = geob->data;
243 
244  if (AV_RB16(gdata) != 1)
245  av_log(s, AV_LOG_WARNING, "Unknown version in encryption header\n");
246 
247  oc->k_size = AV_RB16(&gdata[2]);
248  oc->e_size = AV_RB16(&gdata[4]);
249  oc->i_size = AV_RB16(&gdata[6]);
250  oc->s_size = AV_RB16(&gdata[8]);
251 
252  if (memcmp(&gdata[OMA_ENC_HEADER_SIZE], "KEYRING ", 12)) {
253  av_log(s, AV_LOG_ERROR, "Invalid encryption header\n");
254  return AVERROR_INVALIDDATA;
255  }
256  if (OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size + 8 > geob->datasize ||
257  OMA_ENC_HEADER_SIZE + 48 > geob->datasize) {
258  av_log(s, AV_LOG_ERROR, "Too little GEOB data\n");
259  return AVERROR_INVALIDDATA;
260  }
261  oc->rid = AV_RB32(&gdata[OMA_ENC_HEADER_SIZE + 28]);
262  av_log(s, AV_LOG_DEBUG, "RID: %.8"PRIx32"\n", oc->rid);
263 
264  memcpy(oc->iv, &header[0x58], 8);
265  hex_log(s, AV_LOG_DEBUG, "IV", oc->iv, 8);
266 
267  hex_log(s, AV_LOG_DEBUG, "CBC-MAC",
268  &gdata[OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size],
269  8);
270 
271  if (s->keylen > 0) {
272  kset(s, s->key, s->key, s->keylen);
273  }
274  if (!memcmp(oc->r_val, (const uint8_t[8]){0}, 8) ||
275  rprobe(s, gdata, geob->datasize, oc->r_val) < 0 &&
276  nprobe(s, gdata, geob->datasize, oc->n_val) < 0) {
277  int i;
278  for (i = 0; i < FF_ARRAY_ELEMS(leaf_table); i += 2) {
279  uint8_t buf[16];
280  AV_WL64(buf, leaf_table[i]);
281  AV_WL64(&buf[8], leaf_table[i + 1]);
282  kset(s, buf, buf, 16);
283  if (!rprobe(s, gdata, geob->datasize, oc->r_val) ||
284  !nprobe(s, gdata, geob->datasize, oc->n_val))
285  break;
286  }
287  if (i >= FF_ARRAY_ELEMS(leaf_table)) {
288  av_log(s, AV_LOG_ERROR, "Invalid key\n");
289  return AVERROR_INVALIDDATA;
290  }
291  }
292 
293  oc->av_des = av_des_alloc();
294  if (!oc->av_des)
295  return AVERROR(ENOMEM);
296 
297  /* e_val */
298  av_des_init(oc->av_des, oc->m_val, 64, 0);
299  av_des_crypt(oc->av_des, oc->e_val,
300  &gdata[OMA_ENC_HEADER_SIZE + 40], 1, NULL, 0);
301  hex_log(s, AV_LOG_DEBUG, "EK", oc->e_val, 8);
302 
303  /* init e_val */
304  av_des_init(oc->av_des, oc->e_val, 64, 1);
305 
306  return 0;
307 }
308 
310 {
311  int ret, framesize, jsflag, samplerate;
312  uint32_t codec_params, channel_id;
313  int16_t eid;
315  uint8_t *edata;
316  AVStream *st;
317  ID3v2ExtraMeta *extra_meta = NULL;
318  OMAContext *oc = s->priv_data;
319 
320  ff_id3v2_read(s, ID3v2_EA3_MAGIC, &extra_meta);
321  ret = avio_read(s->pb, buf, EA3_HEADER_SIZE);
322  if (ret < EA3_HEADER_SIZE)
323  return -1;
324 
325  if (memcmp(buf, ((const uint8_t[]){'E', 'A', '3'}), 3) ||
326  buf[4] != 0 || buf[5] != EA3_HEADER_SIZE) {
327  av_log(s, AV_LOG_ERROR, "Couldn't find the EA3 header !\n");
328  return AVERROR_INVALIDDATA;
329  }
330 
331  oc->content_start = avio_tell(s->pb);
332 
333  /* encrypted file */
334  eid = AV_RB16(&buf[6]);
335  if (eid != -1 && eid != -128 && decrypt_init(s, extra_meta, buf) < 0) {
336  ff_id3v2_free_extra_meta(&extra_meta);
337  return -1;
338  }
339 
340  ff_id3v2_free_extra_meta(&extra_meta);
341 
342  codec_params = AV_RB24(&buf[33]);
343 
344  st = avformat_new_stream(s, NULL);
345  if (!st)
346  return AVERROR(ENOMEM);
347 
348  st->start_time = 0;
350  st->codecpar->codec_tag = buf[32];
352  st->codecpar->codec_tag);
353 
354  switch (buf[32]) {
355  case OMA_CODECID_ATRAC3:
356  samplerate = ff_oma_srate_tab[(codec_params >> 13) & 7] * 100;
357  if (!samplerate) {
358  av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
359  return AVERROR_INVALIDDATA;
360  }
361  if (samplerate != 44100)
362  avpriv_request_sample(s, "Sample rate %d", samplerate);
363 
364  framesize = (codec_params & 0x3FF) * 8;
365 
366  /* get stereo coding mode, 1 for joint-stereo */
367  jsflag = (codec_params >> 17) & 1;
368 
369  st->codecpar->channels = 2;
371  st->codecpar->sample_rate = samplerate;
372  st->codecpar->bit_rate = st->codecpar->sample_rate * framesize * 8 / 1024;
373 
374  /* fake the ATRAC3 extradata
375  * (wav format, makes stream copy to wav work) */
376  st->codecpar->extradata_size = 14;
378  if (!edata)
379  return AVERROR(ENOMEM);
380 
381  st->codecpar->extradata = edata;
382  AV_WL16(&edata[0], 1); // always 1
383  AV_WL32(&edata[2], samplerate); // samples rate
384  AV_WL16(&edata[6], jsflag); // coding mode
385  AV_WL16(&edata[8], jsflag); // coding mode
386  AV_WL16(&edata[10], 1); // always 1
387  // AV_WL16(&edata[12], 0); // always 0
388 
389  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
390  break;
391  case OMA_CODECID_ATRAC3P:
392  channel_id = (codec_params >> 10) & 7;
393  if (!channel_id) {
394  av_log(s, AV_LOG_ERROR,
395  "Invalid ATRAC-X channel id: %"PRIu32"\n", channel_id);
396  return AVERROR_INVALIDDATA;
397  }
399  st->codecpar->channels = ff_oma_chid_to_num_channels[channel_id - 1];
400  framesize = ((codec_params & 0x3FF) * 8) + 8;
401  samplerate = ff_oma_srate_tab[(codec_params >> 13) & 7] * 100;
402  if (!samplerate) {
403  av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
404  return AVERROR_INVALIDDATA;
405  }
406  st->codecpar->sample_rate = samplerate;
407  st->codecpar->bit_rate = samplerate * framesize * 8 / 2048;
408  avpriv_set_pts_info(st, 64, 1, samplerate);
409  break;
410  case OMA_CODECID_MP3:
412  framesize = 1024;
413  break;
414  case OMA_CODECID_LPCM:
415  /* PCM 44.1 kHz 16 bit stereo big-endian */
416  st->codecpar->channels = 2;
418  st->codecpar->sample_rate = 44100;
419  framesize = 1024;
420  /* bit rate = sample rate x PCM block align (= 4) x 8 */
421  st->codecpar->bit_rate = st->codecpar->sample_rate * 32;
424  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
425  break;
426  default:
427  av_log(s, AV_LOG_ERROR, "Unsupported codec %d!\n", buf[32]);
428  return AVERROR(ENOSYS);
429  }
430 
431  st->codecpar->block_align = framesize;
432 
433  return 0;
434 }
435 
436 
438 {
439  OMAContext *oc = s->priv_data;
440  AVStream *st = s->streams[0];
441  int packet_size = st->codecpar->block_align;
442  int byte_rate = st->codecpar->bit_rate >> 3;
443  int64_t pos = avio_tell(s->pb);
444  int ret = av_get_packet(s->pb, pkt, packet_size);
445 
446  if (ret < packet_size)
447  pkt->flags |= AV_PKT_FLAG_CORRUPT;
448 
449  if (ret < 0)
450  return ret;
451  if (!ret)
452  return AVERROR_EOF;
453 
454  pkt->stream_index = 0;
455 
456  if (pos > 0) {
457  pkt->pts =
458  pkt->dts = av_rescale(pos, st->time_base.den,
459  byte_rate * (int64_t)st->time_base.num);
460  }
461 
462  if (oc->encrypted) {
463  /* previous unencrypted block saved in IV for
464  * the next packet (CBC mode) */
465  if (ret == packet_size)
466  av_des_crypt(oc->av_des, pkt->data, pkt->data,
467  (packet_size >> 3), oc->iv, 1);
468  else
469  memset(oc->iv, 0, 8);
470  }
471 
472  return ret;
473 }
474 
476 {
477  const uint8_t *buf = p->buf;
478  unsigned tag_len = 0;
479 
481  tag_len = ff_id3v2_tag_len(buf);
482 
483  /* This check cannot overflow as tag_len has at most 28 bits */
484  if (p->buf_size < tag_len + 5)
485  /* EA3 header comes late, might be outside of the probe buffer */
486  return tag_len ? AVPROBE_SCORE_EXTENSION : 0;
487 
488  buf += tag_len;
489 
490  if (!memcmp(buf, "EA3", 3) && !buf[4] && buf[5] == EA3_HEADER_SIZE)
491  return AVPROBE_SCORE_MAX;
492  else
493  return 0;
494 }
495 
496 static int oma_read_seek(struct AVFormatContext *s,
497  int stream_index, int64_t timestamp, int flags)
498 {
499  OMAContext *oc = s->priv_data;
500  int err = ff_pcm_read_seek(s, stream_index, timestamp, flags);
501 
502  if (!oc->encrypted)
503  return err;
504 
505  /* readjust IV for CBC */
506  if (err || avio_tell(s->pb) < oc->content_start)
507  goto wipe;
508  if ((err = avio_seek(s->pb, -8, SEEK_CUR)) < 0)
509  goto wipe;
510  if ((err = avio_read(s->pb, oc->iv, 8)) < 8) {
511  if (err >= 0)
512  err = AVERROR_EOF;
513  goto wipe;
514  }
515 
516  return 0;
517 wipe:
518  memset(oc->iv, 0, 8);
519  return err;
520 }
521 
523 {
524  OMAContext *oc = s->priv_data;
525  av_free(oc->av_des);
526  return 0;
527 }
528 
530  .name = "oma",
531  .long_name = NULL_IF_CONFIG_SMALL("Sony OpenMG audio"),
532  .priv_data_size = sizeof(OMAContext),
539  .extensions = "oma,omg,aa3",
540  .codec_tag = (const AVCodecTag* const []){ff_oma_codec_tags, 0},
541 };
static int oma_read_header(AVFormatContext *s)
Definition: omadec.c:309
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:123
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
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:330
int size
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:1983
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:130
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:2986
AVInputFormat ff_oma_demuxer
Definition: omadec.c:529
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:121
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3483
int num
numerator
Definition: rational.h:44
uint32_t datasize
Definition: id3v2.h:62
av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (%s)\, len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic ? ac->func_descr_generic :ac->func_descr)
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:242
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
#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:92
static int oma_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:437
int encrypted
Definition: omadec.c:64
const AVCodecTag ff_oma_codec_tags[]
Definition: oma.c:28
Format I/O context.
Definition: avformat.h:940
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:879
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:2648
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1008
uint8_t * description
Definition: id3v2.h:65
uint8_t * data
Definition: avcodec.h:1346
static int flags
Definition: log.c:50
#define AVERROR_EOF
End of file.
Definition: error.h:51
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:117
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:295
uint64_t channel_layout
Audio only.
Definition: avcodec.h:3556
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:545
#define AV_WL16(p, val)
Definition: intreadwrite.h:231
uint8_t * data
Definition: id3v2.h:66
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:124
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:2348
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
Definition: mem.c:190
#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:148
uint64_t content_start
Definition: omadec.c:63
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:145
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3479
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:734
int av_log_get_level(void)
Get the current log level.
Definition: log.c:200
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1352
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3501
int bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3512
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:401
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:400
int block_align
Audio only.
Definition: avcodec.h:3571
const char * name
Definition: qsvenc.c:44
audio channel layout utility functions
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:86
#define FFMIN(a, b)
Definition: common.h:66
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:27
uint8_t s_val[8]
Definition: omadec.c:73
#define AV_WL64(p, val)
Definition: intreadwrite.h:309
#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:702
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:546
Stream structure.
Definition: avformat.h:705
#define EA3_HEADER_SIZE
Definition: oma.h:28
AVDES * av_des_alloc(void)
Allocate an AVDES context.
Definition: des.c:280
NULL
Definition: eval.c:55
int av_des_init(AVDES *d, const uint8_t *key, int key_bits, int decrypt)
Initializes an AVDES context.
Definition: des.c:285
uint16_t k_size
Definition: omadec.c:65
#define AV_LOG_INFO
Standard information.
Definition: log.h:135
struct ID3v2ExtraMeta * next
Definition: id3v2.h:58
static int decrypt_init(AVFormatContext *s, ID3v2ExtraMeta *em, uint8_t *header)
Definition: omadec.c:212
AVIOContext * pb
I/O context.
Definition: avformat.h:982
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:80
static int read_packet(AVFormatContext *ctx, AVPacket *pkt)
Definition: libcdio.c:114
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:421
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:336
static const uint64_t leaf_table[]
Definition: omadec.c:56
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:405
This structure contains the data a format has to probe a file.
Definition: avformat.h:398
static int oma_read_seek(struct AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: omadec.c:496
uint8_t e_val[8]
Definition: omadec.c:75
uint8_t level
Definition: svq3.c:204
int sample_rate
Audio only.
Definition: avcodec.h:3564
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:407
const uint8_t * key
Definition: avformat.h:1084
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:657
Main libavformat public API header.
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:125
int64_t start_time
Decoding: pts of the first frame of the stream, in stream time base.
Definition: avformat.h:750
const char * tag
Definition: id3v2.h:56
int den
denominator
Definition: rational.h:45
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: avcodec.h:1379
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:638
static int nprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size, const uint8_t *n_val)
Definition: omadec.c:159
int len
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:968
uint8_t n_val[24]
Definition: omadec.c:71
int bits_per_coded_sample
Definition: avcodec.h:3514
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3497
int channels
Audio only.
Definition: avcodec.h:3560
#define AV_WL32(p, val)
Definition: intreadwrite.h:263
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1345
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:529
Definition: des.h:35
struct AVDES * av_des
Definition: omadec.c:77
static int oma_read_close(AVFormatContext *s)
Definition: omadec.c:522
AVCodecParameters * codecpar
Definition: avformat.h:831
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3487
int stream_index
Definition: avcodec.h:1348
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:742
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:2937
This structure stores compressed data.
Definition: avcodec.h:1323
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:211
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1339
static int oma_read_probe(AVProbeData *p)
Definition: omadec.c:475