FFmpeg: libavformat/omadec.c Source File

FFmpeg
omadec.c
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1 /*
2  * Sony OpenMG (OMA) demuxer
3  *
4  * Copyright (c) 2008, 2013 Maxim Poliakovski
5  * 2008 Benjamin Larsson
6  * 2011 David Goldwich
7  *
8  * This file is part of FFmpeg.
9  *
10  * FFmpeg is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU Lesser General Public
12  * License as published by the Free Software Foundation; either
13  * version 2.1 of the License, or (at your option) any later version.
14  *
15  * FFmpeg is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18  * Lesser General Public License for more details.
19  *
20  * You should have received a copy of the GNU Lesser General Public
21  * License along with FFmpeg; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23  */
24 
25 /**
26  * @file
27  * This is a demuxer for Sony OpenMG Music files
28  *
29  * Known file extensions: ".oma", "aa3"
30  * The format of such files consists of three parts:
31  * - "ea3" header carrying overall info and metadata. Except for starting with
32  * "ea" instead of "ID", it's an ID3v2 header.
33  * - "EA3" header is a Sony-specific header containing information about
34  * the OpenMG file: codec type (usually ATRAC, can also be MP3 or WMA),
35  * codec specific info (packet size, sample rate, channels and so on)
36  * and DRM related info (file encryption, content id).
37  * - Sound data organized in packets follow the EA3 header
38  * (can be encrypted using the Sony DRM!).
39  *
40  * Supported decoders: ATRAC3, ATRAC3+, MP3, LPCM
41  */
42 
43 #include <inttypes.h>
44 
45 #include "libavutil/channel_layout.h"
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 /** map ATRAC-X channel id to internal channel layout */
63  static const AVChannelLayout oma_chid_to_native_layout[7] = {
64  AV_CHANNEL_LAYOUT_MONO,
65  AV_CHANNEL_LAYOUT_STEREO,
66  AV_CHANNEL_LAYOUT_SURROUND,
67  AV_CHANNEL_LAYOUT_4POINT0,
68  AV_CHANNEL_LAYOUT_5POINT1_BACK,
69  AV_CHANNEL_LAYOUT_6POINT1_BACK,
70  AV_CHANNEL_LAYOUT_7POINT1
71 };
72 
73  typedef struct OMAContext {
74   uint64_t content_start;
75   int encrypted;
76   uint16_t k_size;
77   uint16_t e_size;
78   uint16_t i_size;
79   uint16_t s_size;
80   uint32_t rid;
81   uint8_t r_val[24];
82   uint8_t n_val[24];
83   uint8_t m_val[8];
84   uint8_t s_val[8];
85   uint8_t sm_val[8];
86   uint8_t e_val[8];
87   uint8_t iv[8];
88   struct AVDES *av_des;
89 
90   int (*read_packet)(AVFormatContext *s, AVPacket *pkt);
91 } OMAContext;
92 
93  static int oma_read_close(AVFormatContext *s)
94 {
95  OMAContext *oc = s->priv_data;
96  av_freep(&oc->av_des);
97  return 0;
98 }
99 
100  static void hex_log(AVFormatContext *s, int level,
101  const char *name, const uint8_t *value, int len)
102 {
103  char buf[33];
104  len = FFMIN(len, 16);
105  if (av_log_get_level() < level)
106  return;
107  ff_data_to_hex(buf, value, len, 1);
108  av_log(s, level, "%s: %s\n", name, buf);
109 }
110 
111  static int kset(AVFormatContext *s, const uint8_t *r_val, const uint8_t *n_val,
112  int len)
113 {
114  OMAContext *oc = s->priv_data;
115 
116  if (!r_val && !n_val)
117  return -1;
118 
119  len = FFMIN(len, 16);
120 
121  /* use first 64 bits in the third round again */
122  if (r_val) {
123  if (r_val != oc->r_val) {
124  memset(oc->r_val, 0, 24);
125  memcpy(oc->r_val, r_val, len);
126  }
127  memcpy(&oc->r_val[16], r_val, 8);
128  }
129  if (n_val) {
130  if (n_val != oc->n_val) {
131  memset(oc->n_val, 0, 24);
132  memcpy(oc->n_val, n_val, len);
133  }
134  memcpy(&oc->n_val[16], n_val, 8);
135  }
136 
137  return 0;
138 }
139 
140  #define OMA_RPROBE_M_VAL 48 + 1
141 
142  static int rprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size,
143  const uint8_t *r_val)
144 {
145  OMAContext *oc = s->priv_data;
146  unsigned int pos;
147  struct AVDES *av_des;
148 
149  if (!enc_header || !r_val ||
150  size < OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size ||
151  size < OMA_RPROBE_M_VAL)
152  return -1;
153 
154  av_des = av_des_alloc();
155  if (!av_des)
156  return AVERROR(ENOMEM);
157 
158  /* m_val */
159  av_des_init(av_des, r_val, 192, 1);
160  av_des_crypt(av_des, oc->m_val, &enc_header[48], 1, NULL, 1);
161 
162  /* s_val */
163  av_des_init(av_des, oc->m_val, 64, 0);
164  av_des_crypt(av_des, oc->s_val, NULL, 1, NULL, 0);
165 
166  /* sm_val */
167  pos = OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size;
168  av_des_init(av_des, oc->s_val, 64, 0);
169  av_des_mac(av_des, oc->sm_val, &enc_header[pos], (oc->i_size >> 3));
170 
171  pos += oc->i_size;
172 
173  av_free(av_des);
174 
175  return memcmp(&enc_header[pos], oc->sm_val, 8) ? -1 : 0;
176 }
177 
178  static int nprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size,
179  const uint8_t *n_val)
180 {
181  OMAContext *oc = s->priv_data;
182  uint64_t pos;
183  uint32_t taglen, datalen;
184  struct AVDES *av_des;
185 
186  if (!enc_header || !n_val ||
187  size < OMA_ENC_HEADER_SIZE + oc->k_size + 4)
188  return -1;
189 
190  pos = OMA_ENC_HEADER_SIZE + oc->k_size;
191  if (!memcmp(&enc_header[pos], "EKB ", 4))
192  pos += 32;
193 
194  if (size < pos + 44)
195  return -1;
196 
197  if (AV_RB32(&enc_header[pos]) != oc->rid)
198  av_log(s, AV_LOG_DEBUG, "Mismatching RID\n");
199 
200  taglen = AV_RB32(&enc_header[pos + 32]);
201  datalen = AV_RB32(&enc_header[pos + 36]) >> 4;
202 
203  pos += 44LL + taglen;
204 
205  if (pos + (((uint64_t)datalen) << 4) > size)
206  return -1;
207 
208  av_des = av_des_alloc();
209  if (!av_des)
210  return AVERROR(ENOMEM);
211 
212  av_des_init(av_des, n_val, 192, 1);
213  while (datalen-- > 0) {
214  av_des_crypt(av_des, oc->r_val, &enc_header[pos], 2, NULL, 1);
215  kset(s, oc->r_val, NULL, 16);
216  if (!rprobe(s, enc_header, size, oc->r_val)) {
217  av_free(av_des);
218  return 0;
219  }
220  pos += 16;
221  }
222 
223  av_free(av_des);
224  return -1;
225 }
226 
227  static int decrypt_init(AVFormatContext *s, ID3v2ExtraMeta *em, uint8_t *header)
228 {
229  OMAContext *oc = s->priv_data;
230  ID3v2ExtraMetaGEOB *geob = NULL;
231  uint8_t *gdata;
232 
233  oc->encrypted = 1;
234  av_log(s, AV_LOG_INFO, "File is encrypted\n");
235 
236  /* find GEOB metadata */
237  for (; em; em = em->next) {
238  if (strcmp(em->tag, "GEOB"))
239  continue;
240  geob = &em->data.geob;
241  if (!strcmp(geob->description, "OMG_LSI") ||
242  !strcmp(geob->description, "OMG_BKLSI"))
243  break;
244  }
245  if (!em) {
246  av_log(s, AV_LOG_ERROR, "No encryption header found\n");
247  return AVERROR_INVALIDDATA;
248  }
249 
250  if (geob->datasize < 64) {
251  av_log(s, AV_LOG_ERROR,
252  "Invalid GEOB data size: %"PRIu32"\n", geob->datasize);
253  return AVERROR_INVALIDDATA;
254  }
255 
256  gdata = geob->data;
257 
258  if (AV_RB16(gdata) != 1)
259  av_log(s, AV_LOG_WARNING, "Unknown version in encryption header\n");
260 
261  oc->k_size = AV_RB16(&gdata[2]);
262  oc->e_size = AV_RB16(&gdata[4]);
263  oc->i_size = AV_RB16(&gdata[6]);
264  oc->s_size = AV_RB16(&gdata[8]);
265 
266  if (memcmp(&gdata[OMA_ENC_HEADER_SIZE], "KEYRING ", 12)) {
267  av_log(s, AV_LOG_ERROR, "Invalid encryption header\n");
268  return AVERROR_INVALIDDATA;
269  }
270  if (OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size + 8 > geob->datasize ||
271  OMA_ENC_HEADER_SIZE + 48 > geob->datasize) {
272  av_log(s, AV_LOG_ERROR, "Too little GEOB data\n");
273  return AVERROR_INVALIDDATA;
274  }
275  oc->rid = AV_RB32(&gdata[OMA_ENC_HEADER_SIZE + 28]);
276  av_log(s, AV_LOG_DEBUG, "RID: %.8"PRIx32"\n", oc->rid);
277 
278  memcpy(oc->iv, &header[0x58], 8);
279  hex_log(s, AV_LOG_DEBUG, "IV", oc->iv, 8);
280 
281  hex_log(s, AV_LOG_DEBUG, "CBC-MAC",
282  &gdata[OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size],
283  8);
284 
285  if (s->keylen > 0) {
286  kset(s, s->key, s->key, s->keylen);
287  }
288  if (!memcmp(oc->r_val, (const uint8_t[8]){0}, 8) ||
289  rprobe(s, gdata, geob->datasize, oc->r_val) < 0 &&
290  nprobe(s, gdata, geob->datasize, oc->n_val) < 0) {
291  int i;
292  for (i = 0; i < FF_ARRAY_ELEMS(leaf_table); i += 2) {
293  uint8_t buf[16];
294  AV_WL64(buf, leaf_table[i]);
295  AV_WL64(&buf[8], leaf_table[i + 1]);
296  kset(s, buf, buf, 16);
297  if (!rprobe(s, gdata, geob->datasize, oc->r_val) ||
298  !nprobe(s, gdata, geob->datasize, oc->n_val))
299  break;
300  }
301  if (i >= FF_ARRAY_ELEMS(leaf_table)) {
302  av_log(s, AV_LOG_ERROR, "Invalid key\n");
303  return AVERROR_INVALIDDATA;
304  }
305  }
306 
307  oc->av_des = av_des_alloc();
308  if (!oc->av_des)
309  return AVERROR(ENOMEM);
310 
311  /* e_val */
312  av_des_init(oc->av_des, oc->m_val, 64, 0);
313  av_des_crypt(oc->av_des, oc->e_val,
314  &gdata[OMA_ENC_HEADER_SIZE + 40], 1, NULL, 0);
315  hex_log(s, AV_LOG_DEBUG, "EK", oc->e_val, 8);
316 
317  /* init e_val */
318  av_des_init(oc->av_des, oc->e_val, 64, 1);
319 
320  return 0;
321 }
322 
323  static int read_packet(AVFormatContext *s, AVPacket *pkt)
324 {
325  OMAContext *oc = s->priv_data;
326  AVStream *st = s->streams[0];
327  int packet_size = st->codecpar->block_align;
328  int byte_rate = st->codecpar->bit_rate >> 3;
329  int64_t pos = avio_tell(s->pb);
330  int ret = av_get_packet(s->pb, pkt, packet_size);
331 
332  if (ret < packet_size)
333  pkt->flags |= AV_PKT_FLAG_CORRUPT;
334 
335  if (ret < 0)
336  return ret;
337  if (!ret)
338  return AVERROR_EOF;
339 
340  pkt->stream_index = 0;
341 
342  if (pos >= oc->content_start && byte_rate > 0) {
343  pkt->pts =
344  pkt->dts = av_rescale(pos - oc->content_start, st->time_base.den,
345  byte_rate * (int64_t)st->time_base.num);
346  }
347 
348  if (oc->encrypted) {
349  /* previous unencrypted block saved in IV for
350  * the next packet (CBC mode) */
351  if (ret == packet_size)
352  av_des_crypt(oc->av_des, pkt->data, pkt->data,
353  (packet_size >> 3), oc->iv, 1);
354  else
355  memset(oc->iv, 0, 8);
356  }
357 
358  return ret;
359 }
360 
361  static int aal_read_packet(AVFormatContext *s, AVPacket *pkt)
362 {
363  int64_t pos = avio_tell(s->pb);
364  int ret, pts;
365  int packet_size;
366  unsigned tag;
367 
368  if (avio_feof(s->pb))
369  return AVERROR_EOF;
370 
371  tag = avio_rb24(s->pb);
372  if (tag == 0)
373  return AVERROR_EOF;
374  else if (tag != MKBETAG(0,'B','L','K'))
375  return AVERROR_INVALIDDATA;
376 
377  avio_skip(s->pb, 1);
378  packet_size = avio_rb16(s->pb);
379  avio_skip(s->pb, 2);
380  pts = avio_rb32(s->pb);
381  avio_skip(s->pb, 12);
382  ret = av_get_packet(s->pb, pkt, packet_size);
383  if (ret < packet_size)
384  pkt->flags |= AV_PKT_FLAG_CORRUPT;
385 
386  if (ret < 0)
387  return ret;
388  if (!ret)
389  return AVERROR_EOF;
390 
391  pkt->stream_index = 0;
392  pkt->pos = pos;
393  if (s->streams[0]->codecpar->codec_id == AV_CODEC_ID_ATRAC3AL) {
394  pkt->duration = 1024;
395  pkt->pts = pts * 1024LL;
396  } else {
397  pkt->duration = 2048;
398  pkt->pts = pts * 2048LL;
399  }
400 
401  return ret;
402 }
403 
404  static int oma_read_header(AVFormatContext *s)
405 {
406  int ret, framesize, jsflag, samplerate;
407  uint32_t codec_params, channel_id;
408  int16_t eid;
409  uint8_t buf[EA3_HEADER_SIZE];
410  uint8_t *edata;
411  AVStream *st;
412  ID3v2ExtraMeta *extra_meta;
413  OMAContext *oc = s->priv_data;
414 
415  ff_id3v2_read(s, ID3v2_EA3_MAGIC, &extra_meta, 0);
416  if ((ret = ff_id3v2_parse_chapters(s, extra_meta)) < 0) {
417  ff_id3v2_free_extra_meta(&extra_meta);
418  return ret;
419  }
420 
421  ret = avio_read(s->pb, buf, EA3_HEADER_SIZE);
422  if (ret < EA3_HEADER_SIZE) {
423  ff_id3v2_free_extra_meta(&extra_meta);
424  return -1;
425  }
426 
427  if (memcmp(buf, ((const uint8_t[]){'E', 'A', '3'}), 3) ||
428  buf[4] != 0 || buf[5] != EA3_HEADER_SIZE) {
429  ff_id3v2_free_extra_meta(&extra_meta);
430  av_log(s, AV_LOG_ERROR, "Couldn't find the EA3 header !\n");
431  return AVERROR_INVALIDDATA;
432  }
433 
434  oc->content_start = avio_tell(s->pb);
435 
436  /* encrypted file */
437  eid = AV_RB16(&buf[6]);
438  if (eid != -1 && eid != -128 && decrypt_init(s, extra_meta, buf) < 0) {
439  ff_id3v2_free_extra_meta(&extra_meta);
440  return -1;
441  }
442 
443  ff_id3v2_free_extra_meta(&extra_meta);
444 
445  codec_params = AV_RB24(&buf[33]);
446 
447  st = avformat_new_stream(s, NULL);
448  if (!st)
449  return AVERROR(ENOMEM);
450 
451  st->start_time = 0;
452  st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
453  st->codecpar->codec_tag = buf[32];
454  st->codecpar->codec_id = ff_codec_get_id(ff_oma_codec_tags,
455  st->codecpar->codec_tag);
456 
457  oc->read_packet = read_packet;
458 
459  switch (buf[32]) {
460  case OMA_CODECID_ATRAC3:
461  samplerate = ff_oma_srate_tab[(codec_params >> 13) & 7] * 100;
462  if (!samplerate) {
463  av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
464  return AVERROR_INVALIDDATA;
465  }
466  if (samplerate != 44100)
467  avpriv_request_sample(s, "Sample rate %d", samplerate);
468 
469  framesize = (codec_params & 0x3FF) * 8;
470 
471  /* get stereo coding mode, 1 for joint-stereo */
472  jsflag = (codec_params >> 17) & 1;
473 
474  st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
475  st->codecpar->sample_rate = samplerate;
476  st->codecpar->bit_rate = st->codecpar->sample_rate * framesize / (1024 / 8);
477 
478  /* fake the ATRAC3 extradata
479  * (wav format, makes stream copy to wav work) */
480  if ((ret = ff_alloc_extradata(st->codecpar, 14)) < 0)
481  return ret;
482 
483  edata = st->codecpar->extradata;
484  AV_WL16(&edata[0], 1); // always 1
485  AV_WL32(&edata[2], samplerate); // samples rate
486  AV_WL16(&edata[6], jsflag); // coding mode
487  AV_WL16(&edata[8], jsflag); // coding mode
488  AV_WL16(&edata[10], 1); // always 1
489  AV_WL16(&edata[12], 0); // always 0
490 
491  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
492  break;
493  case OMA_CODECID_ATRAC3P:
494  channel_id = (codec_params >> 10) & 7;
495  if (!channel_id) {
496  av_log(s, AV_LOG_ERROR,
497  "Invalid ATRAC-X channel id: %"PRIu32"\n", channel_id);
498  return AVERROR_INVALIDDATA;
499  }
500  av_channel_layout_copy(&st->codecpar->ch_layout,
501  &oma_chid_to_native_layout[channel_id - 1]);
502  framesize = ((codec_params & 0x3FF) * 8) + 8;
503  samplerate = ff_oma_srate_tab[(codec_params >> 13) & 7] * 100;
504  if (!samplerate) {
505  av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
506  return AVERROR_INVALIDDATA;
507  }
508  st->codecpar->sample_rate = samplerate;
509  st->codecpar->bit_rate = samplerate * framesize / (2048 / 8);
510  avpriv_set_pts_info(st, 64, 1, samplerate);
511  break;
512  case OMA_CODECID_MP3:
513  ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL_RAW;
514  framesize = 1024;
515  break;
516  case OMA_CODECID_LPCM:
517  /* PCM 44.1 kHz 16 bit stereo big-endian */
518  st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
519  st->codecpar->sample_rate = 44100;
520  framesize = 1024;
521  /* bit rate = sample rate x PCM block align (= 4) x 8 */
522  st->codecpar->bit_rate = st->codecpar->sample_rate * 32;
523  st->codecpar->bits_per_coded_sample =
524  av_get_bits_per_sample(st->codecpar->codec_id);
525  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
526  break;
527  case OMA_CODECID_ATRAC3AL:
528  st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
529  st->codecpar->sample_rate = 44100;
530  avpriv_set_pts_info(st, 64, 1, 44100);
531  oc->read_packet = aal_read_packet;
532  framesize = 4096;
533  break;
534  case OMA_CODECID_ATRAC3PAL:
535  st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
536  st->codecpar->sample_rate = 44100;
537  avpriv_set_pts_info(st, 64, 1, 44100);
538  oc->read_packet = aal_read_packet;
539  framesize = 4096;
540  break;
541  default:
542  av_log(s, AV_LOG_ERROR, "Unsupported codec %d!\n", buf[32]);
543  return AVERROR(ENOSYS);
544  }
545 
546  st->codecpar->block_align = framesize;
547 
548  return 0;
549 }
550 
551  static int oma_read_packet(AVFormatContext *s, AVPacket *pkt)
552 {
553  OMAContext *oc = s->priv_data;
554  return oc->read_packet(s, pkt);
555 }
556 
557  static int oma_read_probe(const AVProbeData *p)
558 {
559  const uint8_t *buf = p->buf;
560  unsigned tag_len = 0;
561 
562  if (p->buf_size >= ID3v2_HEADER_SIZE && ff_id3v2_match(buf, ID3v2_EA3_MAGIC))
563  tag_len = ff_id3v2_tag_len(buf);
564 
565  /* This check cannot overflow as tag_len has at most 28 bits */
566  if (p->buf_size < tag_len + 5)
567  /* EA3 header comes late, might be outside of the probe buffer */
568  return tag_len ? AVPROBE_SCORE_EXTENSION/2 : 0;
569 
570  buf += tag_len;
571 
572  if (!memcmp(buf, "EA3", 3) && !buf[4] && buf[5] == EA3_HEADER_SIZE)
573  return AVPROBE_SCORE_MAX;
574  else
575  return 0;
576 }
577 
578  static int oma_read_seek(struct AVFormatContext *s,
579  int stream_index, int64_t timestamp, int flags)
580 {
581  OMAContext *oc = s->priv_data;
582  AVStream *st = s->streams[0];
583  int64_t err;
584 
585  if (st->codecpar->codec_id == AV_CODEC_ID_ATRAC3PAL ||
586  st->codecpar->codec_id == AV_CODEC_ID_ATRAC3AL)
587  return -1;
588 
589  err = ff_pcm_read_seek(s, stream_index, timestamp, flags);
590  if (!oc->encrypted)
591  return err;
592 
593  /* readjust IV for CBC */
594  if (err || avio_tell(s->pb) < oc->content_start)
595  goto wipe;
596  if ((err = avio_seek(s->pb, -8, SEEK_CUR)) < 0)
597  goto wipe;
598  if ((err = avio_read(s->pb, oc->iv, 8)) < 8) {
599  if (err >= 0)
600  err = AVERROR_EOF;
601  goto wipe;
602  }
603 
604  return 0;
605 wipe:
606  memset(oc->iv, 0, 8);
607  return err;
608 }
609 
610  const AVInputFormat ff_oma_demuxer = {
611  .name = "oma",
612  .long_name = NULL_IF_CONFIG_SMALL("Sony OpenMG audio"),
613  .priv_data_size = sizeof(OMAContext),
614  .flags_internal = FF_FMT_INIT_CLEANUP,
615  .read_probe = oma_read_probe,
616  .read_header = oma_read_header,
617  .read_packet = oma_read_packet,
618  .read_seek = oma_read_seek,
619  .read_close = oma_read_close,
620  .flags = AVFMT_GENERIC_INDEX,
621  .extensions = "oma,omg,aa3",
622  .codec_tag = ff_oma_codec_tags_list,
623 };
av_des_init
int av_des_init(AVDES *d, const uint8_t *key, int key_bits, av_unused int decrypt)
Definition: des.c:280
OMAContext::iv
uint8_t iv[8]
Definition: omadec.c:87
oma.h
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
ID3v2ExtraMeta::geob
ID3v2ExtraMetaGEOB geob
Definition: id3v2.h:90
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:75
name
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default minimum maximum flags name is the option name
Definition: writing_filters.txt:88
level
uint8_t level
Definition: svq3.c:206
OMAContext::n_val
uint8_t n_val[24]
Definition: omadec.c:82
FF_FMT_INIT_CLEANUP
#define FF_FMT_INIT_CLEANUP
For an AVInputFormat with this flag set read_close() needs to be called by the caller upon read_heade...
Definition: internal.h:48
AVERROR
Filter the word "frame" indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: options.c:237
pcm.h
OMAContext::rid
uint32_t rid
Definition: omadec.c:80
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:57
AV_WL32
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
ID3v2ExtraMeta::next
struct ID3v2ExtraMeta * next
Definition: id3v2.h:86
OMAContext::av_des
struct AVDES * av_des
Definition: omadec.c:88
ID3v2ExtraMeta::data
union ID3v2ExtraMeta::@264 data
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
ff_oma_codec_tags_list
const AVCodecTag *const ff_oma_codec_tags_list[]
Definition: oma.c:38
av_des_crypt
void av_des_crypt(AVDES *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt)
Encrypts / decrypts using the DES algorithm.
Definition: des.c:324
hex_log
static void hex_log(AVFormatContext *s, int level, const char *name, const uint8_t *value, int len)
Definition: omadec.c:100
id3v2.h
AVPacket::data
uint8_t * data
Definition: packet.h:374
ff_oma_srate_tab
const uint16_t ff_oma_srate_tab[8]
Definition: oma.c:26
AV_CHANNEL_LAYOUT_4POINT0
#define AV_CHANNEL_LAYOUT_4POINT0
Definition: channel_layout.h:359
OMA_ENC_HEADER_SIZE
#define OMA_ENC_HEADER_SIZE
Definition: oma.h:32
AV_CHANNEL_LAYOUT_MONO
#define AV_CHANNEL_LAYOUT_MONO
Definition: channel_layout.h:353
ff_id3v2_read
void ff_id3v2_read(AVFormatContext *s, const char *magic, ID3v2ExtraMeta **extra_meta, unsigned int max_search_size)
Read an ID3v2 tag, including supported extra metadata.
Definition: id3v2.c:1136
AV_CODEC_ID_ATRAC3PAL
@ AV_CODEC_ID_ATRAC3PAL
Definition: codec_id.h:510
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:392
AV_CHANNEL_LAYOUT_STEREO
#define AV_CHANNEL_LAYOUT_STEREO
Definition: channel_layout.h:354
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:65
mathematics.h
AVProbeData::buf_size
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:456
ID3v2ExtraMetaGEOB
Definition: id3v2.h:57
oma_read_seek
static int oma_read_seek(struct AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: omadec.c:578
av_channel_layout_copy
int av_channel_layout_copy(AVChannelLayout *dst, const AVChannelLayout *src)
Make a copy of a channel layout.
Definition: channel_layout.c:637
OMA_CODECID_ATRAC3PAL
@ OMA_CODECID_ATRAC3PAL
Definition: oma.h:40
OMAContext::r_val
uint8_t r_val[24]
Definition: omadec.c:81
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:465
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *st, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: avformat.c:697
ffstream
static av_always_inline FFStream * ffstream(AVStream *st)
Definition: internal.h:407
read_seek
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:151
read_close
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:143
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:505
AV_CHANNEL_LAYOUT_SURROUND
#define AV_CHANNEL_LAYOUT_SURROUND
Definition: channel_layout.h:357
AVFMT_GENERIC_INDEX
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:482
pts
static int64_t pts
Definition: transcode_aac.c:654
ff_data_to_hex
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Write hexadecimal string corresponding to given binary data.
Definition: utils.c:454
rprobe
static int rprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size, const uint8_t *r_val)
Definition: omadec.c:142
AVRational::num
int num
Numerator.
Definition: rational.h:59
ff_id3v2_parse_chapters
int ff_id3v2_parse_chapters(AVFormatContext *s, ID3v2ExtraMeta *cur)
Create chapters for all CHAP tags found in the ID3v2 header.
Definition: id3v2.c:1189
OMAContext
Definition: omadec.c:73
OMAContext::read_packet
int(* read_packet)(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:90
av_get_bits_per_sample
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:586
avio_rb32
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:790
pkt
AVPacket * pkt
Definition: movenc.c:59
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
AVInputFormat
Definition: avformat.h:656
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen.c:29
AV_PKT_FLAG_CORRUPT
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: packet.h:430
nprobe
static int nprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size, const uint8_t *n_val)
Definition: omadec.c:178
OMAContext::encrypted
int encrypted
Definition: omadec.c:75
ID3v2ExtraMeta
Definition: id3v2.h:84
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:256
av_des_mac
void av_des_mac(AVDES *d, uint8_t *dst, const uint8_t *src, int count)
Calculates CBC-MAC using the DES algorithm.
Definition: des.c:330
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:661
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:455
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
decrypt_init
static int decrypt_init(AVFormatContext *s, ID3v2ExtraMeta *em, uint8_t *header)
Definition: omadec.c:227
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
OMAContext::i_size
uint16_t i_size
Definition: omadec.c:78
ID3v2ExtraMetaGEOB::datasize
uint32_t datasize
Definition: id3v2.h:58
FFStream::need_parsing
enum AVStreamParseType need_parsing
Definition: internal.h:380
ID3v2ExtraMeta::tag
const char * tag
Definition: id3v2.h:85
AVFormatContext
Format I/O context.
Definition: avformat.h:1213
av_log_get_level
int av_log_get_level(void)
Get the current log level.
Definition: log.c:437
internal.h
ff_oma_codec_tags
const AVCodecTag ff_oma_codec_tags[]
Definition: oma.c:28
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1108
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:532
OMA_CODECID_MP3
@ OMA_CODECID_MP3
Definition: oma.h:37
AVStream::time_base
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avformat.h:978
NULL
#define NULL
Definition: coverity.c:32
read_packet
static int read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:323
OMA_CODECID_LPCM
@ OMA_CODECID_LPCM
Definition: oma.h:38
read_probe
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
OMAContext::s_size
uint16_t s_size
Definition: omadec.c:79
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:453
AV_CHANNEL_LAYOUT_7POINT1
#define AV_CHANNEL_LAYOUT_7POINT1
Definition: channel_layout.h:375
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
Audio only.
Definition: codec_par.h:212
ID3v2_HEADER_SIZE
#define ID3v2_HEADER_SIZE
Definition: id3v2.h:30
AVPROBE_SCORE_EXTENSION
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:463
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:177
AV_CODEC_ID_ATRAC3AL
@ AV_CODEC_ID_ATRAC3AL
Definition: codec_id.h:509
OMAContext::content_start
uint64_t content_start
Definition: omadec.c:74
ID3v2_EA3_MAGIC
#define ID3v2_EA3_MAGIC
Definition: oma.h:31
avio_rb24
unsigned int avio_rb24(AVIOContext *s)
Definition: aviobuf.c:783
OMA_RPROBE_M_VAL
#define OMA_RPROBE_M_VAL
Definition: omadec.c:140
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
ff_codec_get_id
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:144
AVChannelLayout
An AVChannelLayout holds information about the channel layout of audio data.
Definition: channel_layout.h:290
des.h
size
int size
Definition: twinvq_data.h:10344
MKBETAG
#define MKBETAG(a, b, c, d)
Definition: macros.h:56
AV_RB32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:96
ff_oma_demuxer
const AVInputFormat ff_oma_demuxer
Definition: omadec.c:610
header
static const uint8_t header[24]
Definition: sdr2.c:67
aal_read_packet
static int aal_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:361
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:373
AV_WL16
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
AV_WL64
#define AV_WL64(p, v)
Definition: intreadwrite.h:440
kset
static int kset(AVFormatContext *s, const uint8_t *r_val, const uint8_t *n_val, int len)
Definition: omadec.c:111
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:380
OMA_CODECID_ATRAC3P
@ OMA_CODECID_ATRAC3P
Definition: oma.h:36
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:191
av_des_alloc
AVDES * av_des_alloc(void)
Allocate an AVDES context.
Definition: des.c:275
OMAContext::s_val
uint8_t s_val[8]
Definition: omadec.c:84
oma_read_close
static int oma_read_close(AVFormatContext *s)
Definition: omadec.c:93
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:367
oma_chid_to_native_layout
static const AVChannelLayout oma_chid_to_native_layout[7]
map ATRAC-X channel id to internal channel layout
Definition: omadec.c:63
AVCodecParameters::block_align
int block_align
Audio only.
Definition: codec_par.h:184
value
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default value
Definition: writing_filters.txt:86
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
len
int len
Definition: vorbis_enc_data.h:426
av_rescale
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
av_get_packet
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
Allocate and read the payload of a packet and initialize its fields with default values.
Definition: utils.c:102
oma_read_header
static int oma_read_header(AVFormatContext *s)
Definition: omadec.c:404
OMAContext::k_size
uint16_t k_size
Definition: omadec.c:76
AVDES
Definition: des.h:33
ff_id3v2_tag_len
int ff_id3v2_tag_len(const uint8_t *buf)
Get the length of an ID3v2 tag.
Definition: id3v2.c:157
tag
uint32_t tag
Definition: movenc.c:1646
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:948
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:260
ff_pcm_read_seek
int ff_pcm_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: pcm.c:56
avio_rb16
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:775
AV_CHANNEL_LAYOUT_6POINT1_BACK
#define AV_CHANNEL_LAYOUT_6POINT1_BACK
Definition: channel_layout.h:371
pos
unsigned int pos
Definition: spdifenc.c:412
avformat.h
ID3v2ExtraMetaGEOB::description
uint8_t * description
Definition: id3v2.h:61
OMA_CODECID_ATRAC3AL
@ OMA_CODECID_ATRAC3AL
Definition: oma.h:41
channel_layout.h
AVRational::den
int den
Denominator.
Definition: rational.h:60
OMAContext::e_size
uint16_t e_size
Definition: omadec.c:77
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:641
ID3v2ExtraMetaGEOB::data
uint8_t * data
Definition: id3v2.h:62
oma_read_probe
static int oma_read_probe(const AVProbeData *p)
Definition: omadec.c:557
AVSTREAM_PARSE_FULL_RAW
@ AVSTREAM_PARSE_FULL_RAW
full parsing and repack with timestamp and position generation by parser for raw this assumes that ea...
Definition: avformat.h:802
AVPacket::stream_index
int stream_index
Definition: packet.h:376
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:347
AVCodecParameters::bits_per_coded_sample
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:103
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:36
EA3_HEADER_SIZE
#define EA3_HEADER_SIZE
Definition: oma.h:30
av_free
#define av_free(p)
Definition: tableprint_vlc.h:33
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:61
AVPacket
This structure stores compressed data.
Definition: packet.h:351
OMAContext::e_val
uint8_t e_val[8]
Definition: omadec.c:86
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
ff_id3v2_free_extra_meta
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1142
AVPacket::pos
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:394
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AVCodecParameters::bit_rate
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:90
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
oma_read_packet
static int oma_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:551
OMAContext::m_val
uint8_t m_val[8]
Definition: omadec.c:83
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
AVStream::start_time
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base.
Definition: avformat.h:988
AV_CHANNEL_LAYOUT_5POINT1_BACK
#define AV_CHANNEL_LAYOUT_5POINT1_BACK
Definition: channel_layout.h:366
AV_RB24
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_RB24
Definition: bytestream.h:97
int
int
Definition: ffmpeg_filter.c:153
OMA_CODECID_ATRAC3
@ OMA_CODECID_ATRAC3
Definition: oma.h:35
OMAContext::sm_val
uint8_t sm_val[8]
Definition: omadec.c:85
leaf_table
static const uint64_t leaf_table[]
Definition: omadec.c:56
ff_id3v2_match
int ff_id3v2_match(const uint8_t *buf, const char *magic)
Detect ID3v2 Header.
Definition: id3v2.c:144
AV_RB16
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
Definition: bytestream.h:98
ff_alloc_extradata
int ff_alloc_extradata(AVCodecParameters *par, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0.
Definition: utils.c:238
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:375
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