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 "libavutil/mem.h"
47 #include "avformat.h"
48 #include "demux.h"
49 #include "internal.h"
50 #include "libavutil/intreadwrite.h"
51 #include "libavutil/des.h"
52 #include "libavutil/mathematics.h"
53 #include "oma.h"
54 #include "pcm.h"
55 #include "id3v2.h"
56 
57 
58  static const uint64_t leaf_table[] = {
59  0xd79e8283acea4620, 0x7a9762f445afd0d8,
60  0x354d60a60b8c79f1, 0x584e1cde00b07aee,
61  0x1573cd93da7df623, 0x47f98d79620dd535
62 };
63 
64 /** map ATRAC-X channel id to internal channel layout */
65  static const AVChannelLayout oma_chid_to_native_layout[7] = {
66  AV_CHANNEL_LAYOUT_MONO,
67  AV_CHANNEL_LAYOUT_STEREO,
68  AV_CHANNEL_LAYOUT_SURROUND,
69  AV_CHANNEL_LAYOUT_4POINT0,
70  AV_CHANNEL_LAYOUT_5POINT1_BACK,
71  AV_CHANNEL_LAYOUT_6POINT1_BACK,
72  AV_CHANNEL_LAYOUT_7POINT1
73 };
74 
75  typedef struct OMAContext {
76   uint64_t content_start;
77   int encrypted;
78   uint16_t k_size;
79   uint16_t e_size;
80   uint16_t i_size;
81   uint16_t s_size;
82   uint32_t rid;
83   uint8_t r_val[24];
84   uint8_t n_val[24];
85   uint8_t m_val[8];
86   uint8_t s_val[8];
87   uint8_t sm_val[8];
88   uint8_t e_val[8];
89   uint8_t iv[8];
90   struct AVDES *av_des;
91 
92   int (*read_packet)(AVFormatContext *s, AVPacket *pkt);
93 } OMAContext;
94 
95  static int oma_read_close(AVFormatContext *s)
96 {
97  OMAContext *oc = s->priv_data;
98  av_freep(&oc->av_des);
99  return 0;
100 }
101 
102  static void hex_log(AVFormatContext *s, int level,
103  const char *name, const uint8_t *value, int len)
104 {
105  char buf[33];
106  len = FFMIN(len, 16);
107  if (av_log_get_level() < level)
108  return;
109  ff_data_to_hex(buf, value, len, 1);
110  av_log(s, level, "%s: %s\n", name, buf);
111 }
112 
113  static int kset(AVFormatContext *s, const uint8_t *r_val, const uint8_t *n_val,
114  int len)
115 {
116  OMAContext *oc = s->priv_data;
117 
118  if (!r_val && !n_val)
119  return -1;
120 
121  len = FFMIN(len, 16);
122 
123  /* use first 64 bits in the third round again */
124  if (r_val) {
125  if (r_val != oc->r_val) {
126  memset(oc->r_val, 0, 24);
127  memcpy(oc->r_val, r_val, len);
128  }
129  memcpy(&oc->r_val[16], r_val, 8);
130  }
131  if (n_val) {
132  if (n_val != oc->n_val) {
133  memset(oc->n_val, 0, 24);
134  memcpy(oc->n_val, n_val, len);
135  }
136  memcpy(&oc->n_val[16], n_val, 8);
137  }
138 
139  return 0;
140 }
141 
142  #define OMA_RPROBE_M_VAL 48 + 1
143 
144  static int rprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size,
145  const uint8_t *r_val)
146 {
147  OMAContext *oc = s->priv_data;
148  unsigned int pos;
149  struct AVDES *av_des;
150 
151  if (!enc_header || !r_val ||
152  size < OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size ||
153  size < OMA_RPROBE_M_VAL)
154  return -1;
155 
156  av_des = av_des_alloc();
157  if (!av_des)
158  return AVERROR(ENOMEM);
159 
160  /* m_val */
161  av_des_init(av_des, r_val, 192, 1);
162  av_des_crypt(av_des, oc->m_val, &enc_header[48], 1, NULL, 1);
163 
164  /* s_val */
165  av_des_init(av_des, oc->m_val, 64, 0);
166  av_des_crypt(av_des, oc->s_val, NULL, 1, NULL, 0);
167 
168  /* sm_val */
169  pos = OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size;
170  av_des_init(av_des, oc->s_val, 64, 0);
171  av_des_mac(av_des, oc->sm_val, &enc_header[pos], (oc->i_size >> 3));
172 
173  pos += oc->i_size;
174 
175  av_free(av_des);
176 
177  return memcmp(&enc_header[pos], oc->sm_val, 8) ? -1 : 0;
178 }
179 
180  static int nprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size,
181  const uint8_t *n_val)
182 {
183  OMAContext *oc = s->priv_data;
184  uint64_t pos;
185  uint32_t taglen, datalen;
186  struct AVDES *av_des;
187 
188  if (!enc_header || !n_val ||
189  size < OMA_ENC_HEADER_SIZE + oc->k_size + 4)
190  return -1;
191 
192  pos = OMA_ENC_HEADER_SIZE + oc->k_size;
193  if (!memcmp(&enc_header[pos], "EKB ", 4))
194  pos += 32;
195 
196  if (size < pos + 44)
197  return -1;
198 
199  if (AV_RB32(&enc_header[pos]) != oc->rid)
200  av_log(s, AV_LOG_DEBUG, "Mismatching RID\n");
201 
202  taglen = AV_RB32(&enc_header[pos + 32]);
203  datalen = AV_RB32(&enc_header[pos + 36]) >> 4;
204 
205  pos += 44LL + taglen;
206 
207  if (pos + (((uint64_t)datalen) << 4) > size)
208  return -1;
209 
210  av_des = av_des_alloc();
211  if (!av_des)
212  return AVERROR(ENOMEM);
213 
214  av_des_init(av_des, n_val, 192, 1);
215  while (datalen-- > 0) {
216  av_des_crypt(av_des, oc->r_val, &enc_header[pos], 2, NULL, 1);
217  kset(s, oc->r_val, NULL, 16);
218  if (!rprobe(s, enc_header, size, oc->r_val)) {
219  av_free(av_des);
220  return 0;
221  }
222  pos += 16;
223  }
224 
225  av_free(av_des);
226  return -1;
227 }
228 
229  static int decrypt_init(AVFormatContext *s, ID3v2ExtraMeta *em, uint8_t *header)
230 {
231  OMAContext *oc = s->priv_data;
232  ID3v2ExtraMetaGEOB *geob = NULL;
233  uint8_t *gdata;
234 
235  oc->encrypted = 1;
236  av_log(s, AV_LOG_INFO, "File is encrypted\n");
237 
238  /* find GEOB metadata */
239  for (; em; em = em->next) {
240  if (strcmp(em->tag, "GEOB"))
241  continue;
242  geob = &em->data.geob;
243  if (!strcmp(geob->description, "OMG_LSI") ||
244  !strcmp(geob->description, "OMG_BKLSI"))
245  break;
246  }
247  if (!em) {
248  av_log(s, AV_LOG_ERROR, "No encryption header found\n");
249  return AVERROR_INVALIDDATA;
250  }
251 
252  if (geob->datasize < 64) {
253  av_log(s, AV_LOG_ERROR,
254  "Invalid GEOB data size: %"PRIu32"\n", geob->datasize);
255  return AVERROR_INVALIDDATA;
256  }
257 
258  gdata = geob->data;
259 
260  if (AV_RB16(gdata) != 1)
261  av_log(s, AV_LOG_WARNING, "Unknown version in encryption header\n");
262 
263  oc->k_size = AV_RB16(&gdata[2]);
264  oc->e_size = AV_RB16(&gdata[4]);
265  oc->i_size = AV_RB16(&gdata[6]);
266  oc->s_size = AV_RB16(&gdata[8]);
267 
268  if (memcmp(&gdata[OMA_ENC_HEADER_SIZE], "KEYRING ", 12)) {
269  av_log(s, AV_LOG_ERROR, "Invalid encryption header\n");
270  return AVERROR_INVALIDDATA;
271  }
272  if (OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size + 8 > geob->datasize ||
273  OMA_ENC_HEADER_SIZE + 48 > geob->datasize) {
274  av_log(s, AV_LOG_ERROR, "Too little GEOB data\n");
275  return AVERROR_INVALIDDATA;
276  }
277  oc->rid = AV_RB32(&gdata[OMA_ENC_HEADER_SIZE + 28]);
278  av_log(s, AV_LOG_DEBUG, "RID: %.8"PRIx32"\n", oc->rid);
279 
280  memcpy(oc->iv, &header[0x58], 8);
281  hex_log(s, AV_LOG_DEBUG, "IV", oc->iv, 8);
282 
283  hex_log(s, AV_LOG_DEBUG, "CBC-MAC",
284  &gdata[OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size],
285  8);
286 
287  if (s->keylen > 0) {
288  kset(s, s->key, s->key, s->keylen);
289  }
290  if (!memcmp(oc->r_val, (const uint8_t[8]){0}, 8) ||
291  rprobe(s, gdata, geob->datasize, oc->r_val) < 0 &&
292  nprobe(s, gdata, geob->datasize, oc->n_val) < 0) {
293  int i;
294  for (i = 0; i < FF_ARRAY_ELEMS(leaf_table); i += 2) {
295  uint8_t buf[16];
296  AV_WL64(buf, leaf_table[i]);
297  AV_WL64(&buf[8], leaf_table[i + 1]);
298  kset(s, buf, buf, 16);
299  if (!rprobe(s, gdata, geob->datasize, oc->r_val) ||
300  !nprobe(s, gdata, geob->datasize, oc->n_val))
301  break;
302  }
303  if (i >= FF_ARRAY_ELEMS(leaf_table)) {
304  av_log(s, AV_LOG_ERROR, "Invalid key\n");
305  return AVERROR_INVALIDDATA;
306  }
307  }
308 
309  oc->av_des = av_des_alloc();
310  if (!oc->av_des)
311  return AVERROR(ENOMEM);
312 
313  /* e_val */
314  av_des_init(oc->av_des, oc->m_val, 64, 0);
315  av_des_crypt(oc->av_des, oc->e_val,
316  &gdata[OMA_ENC_HEADER_SIZE + 40], 1, NULL, 0);
317  hex_log(s, AV_LOG_DEBUG, "EK", oc->e_val, 8);
318 
319  /* init e_val */
320  av_des_init(oc->av_des, oc->e_val, 64, 1);
321 
322  return 0;
323 }
324 
325  static int read_packet(AVFormatContext *s, AVPacket *pkt)
326 {
327  OMAContext *oc = s->priv_data;
328  AVStream *st = s->streams[0];
329  int packet_size = st->codecpar->block_align;
330  int byte_rate = st->codecpar->bit_rate >> 3;
331  int64_t pos = avio_tell(s->pb);
332  int ret = av_get_packet(s->pb, pkt, packet_size);
333 
334  if (ret < packet_size)
335  pkt->flags |= AV_PKT_FLAG_CORRUPT;
336 
337  if (ret < 0)
338  return ret;
339  if (!ret)
340  return AVERROR_EOF;
341 
342  pkt->stream_index = 0;
343 
344  if (pos >= oc->content_start && byte_rate > 0) {
345  pkt->pts =
346  pkt->dts = av_rescale(pos - oc->content_start, st->time_base.den,
347  byte_rate * (int64_t)st->time_base.num);
348  }
349 
350  if (oc->encrypted) {
351  /* previous unencrypted block saved in IV for
352  * the next packet (CBC mode) */
353  if (ret == packet_size)
354  av_des_crypt(oc->av_des, pkt->data, pkt->data,
355  (packet_size >> 3), oc->iv, 1);
356  else
357  memset(oc->iv, 0, 8);
358  }
359 
360  return ret;
361 }
362 
363  static int aal_read_packet(AVFormatContext *s, AVPacket *pkt)
364 {
365  int64_t pos = avio_tell(s->pb);
366  int ret, pts;
367  int packet_size;
368  unsigned tag;
369 
370  if (avio_feof(s->pb))
371  return AVERROR_EOF;
372 
373  tag = avio_rb24(s->pb);
374  if (tag == 0)
375  return AVERROR_EOF;
376  else if (tag != MKBETAG(0,'B','L','K'))
377  return AVERROR_INVALIDDATA;
378 
379  avio_skip(s->pb, 1);
380  packet_size = avio_rb16(s->pb);
381  avio_skip(s->pb, 2);
382  pts = avio_rb32(s->pb);
383  avio_skip(s->pb, 12);
384  ret = av_get_packet(s->pb, pkt, packet_size);
385  if (ret < packet_size)
386  pkt->flags |= AV_PKT_FLAG_CORRUPT;
387 
388  if (ret < 0)
389  return ret;
390  if (!ret)
391  return AVERROR_EOF;
392 
393  pkt->stream_index = 0;
394  pkt->pos = pos;
395  if (s->streams[0]->codecpar->codec_id == AV_CODEC_ID_ATRAC3AL) {
396  pkt->duration = 1024;
397  pkt->pts = pts * 1024LL;
398  } else {
399  pkt->duration = 2048;
400  pkt->pts = pts * 2048LL;
401  }
402 
403  return ret;
404 }
405 
406  static int oma_read_header(AVFormatContext *s)
407 {
408  int ret, framesize, jsflag, samplerate;
409  uint32_t codec_params, channel_id;
410  int16_t eid;
411  uint8_t buf[EA3_HEADER_SIZE];
412  uint8_t *edata;
413  AVStream *st;
414  ID3v2ExtraMeta *extra_meta;
415  OMAContext *oc = s->priv_data;
416 
417  ff_id3v2_read(s, ID3v2_EA3_MAGIC, &extra_meta, 0);
418  if ((ret = ff_id3v2_parse_chapters(s, extra_meta)) < 0) {
419  ff_id3v2_free_extra_meta(&extra_meta);
420  return ret;
421  }
422 
423  ret = avio_read(s->pb, buf, EA3_HEADER_SIZE);
424  if (ret < EA3_HEADER_SIZE) {
425  ff_id3v2_free_extra_meta(&extra_meta);
426  return -1;
427  }
428 
429  if (memcmp(buf, ((const uint8_t[]){'E', 'A', '3'}), 3) ||
430  buf[4] != 0 || buf[5] != EA3_HEADER_SIZE) {
431  ff_id3v2_free_extra_meta(&extra_meta);
432  av_log(s, AV_LOG_ERROR, "Couldn't find the EA3 header !\n");
433  return AVERROR_INVALIDDATA;
434  }
435 
436  oc->content_start = avio_tell(s->pb);
437 
438  /* encrypted file */
439  eid = AV_RB16(&buf[6]);
440  if (eid != -1 && eid != -128 && decrypt_init(s, extra_meta, buf) < 0) {
441  ff_id3v2_free_extra_meta(&extra_meta);
442  return -1;
443  }
444 
445  ff_id3v2_free_extra_meta(&extra_meta);
446 
447  codec_params = AV_RB24(&buf[33]);
448 
449  st = avformat_new_stream(s, NULL);
450  if (!st)
451  return AVERROR(ENOMEM);
452 
453  st->start_time = 0;
454  st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
455  st->codecpar->codec_tag = buf[32];
456  st->codecpar->codec_id = ff_codec_get_id(ff_oma_codec_tags,
457  st->codecpar->codec_tag);
458 
459  oc->read_packet = read_packet;
460 
461  switch (buf[32]) {
462  case OMA_CODECID_ATRAC3:
463  samplerate = ff_oma_srate_tab[(codec_params >> 13) & 7] * 100;
464  if (!samplerate) {
465  av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
466  return AVERROR_INVALIDDATA;
467  }
468  if (samplerate != 44100)
469  avpriv_request_sample(s, "Sample rate %d", samplerate);
470 
471  framesize = (codec_params & 0x3FF) * 8;
472 
473  /* get stereo coding mode, 1 for joint-stereo */
474  jsflag = (codec_params >> 17) & 1;
475 
476  st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
477  st->codecpar->sample_rate = samplerate;
478  st->codecpar->bit_rate = st->codecpar->sample_rate * framesize / (1024 / 8);
479 
480  /* fake the ATRAC3 extradata
481  * (wav format, makes stream copy to wav work) */
482  if ((ret = ff_alloc_extradata(st->codecpar, 14)) < 0)
483  return ret;
484 
485  edata = st->codecpar->extradata;
486  AV_WL16(&edata[0], 1); // always 1
487  AV_WL32(&edata[2], samplerate); // samples rate
488  AV_WL16(&edata[6], jsflag); // coding mode
489  AV_WL16(&edata[8], jsflag); // coding mode
490  AV_WL16(&edata[10], 1); // always 1
491  AV_WL16(&edata[12], 0); // always 0
492 
493  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
494  break;
495  case OMA_CODECID_ATRAC3P:
496  channel_id = (codec_params >> 10) & 7;
497  if (!channel_id) {
498  av_log(s, AV_LOG_ERROR,
499  "Invalid ATRAC-X channel id: %"PRIu32"\n", channel_id);
500  return AVERROR_INVALIDDATA;
501  }
502  av_channel_layout_copy(&st->codecpar->ch_layout,
503  &oma_chid_to_native_layout[channel_id - 1]);
504  framesize = ((codec_params & 0x3FF) * 8) + 8;
505  samplerate = ff_oma_srate_tab[(codec_params >> 13) & 7] * 100;
506  if (!samplerate) {
507  av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
508  return AVERROR_INVALIDDATA;
509  }
510  st->codecpar->sample_rate = samplerate;
511  st->codecpar->bit_rate = samplerate * framesize / (2048 / 8);
512  avpriv_set_pts_info(st, 64, 1, samplerate);
513  break;
514  case OMA_CODECID_MP3:
515  ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL_RAW;
516  framesize = 1024;
517  break;
518  case OMA_CODECID_LPCM:
519  /* PCM 44.1 kHz 16 bit stereo big-endian */
520  st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
521  st->codecpar->sample_rate = 44100;
522  framesize = 1024;
523  /* bit rate = sample rate x PCM block align (= 4) x 8 */
524  st->codecpar->bit_rate = st->codecpar->sample_rate * 32;
525  st->codecpar->bits_per_coded_sample =
526  av_get_bits_per_sample(st->codecpar->codec_id);
527  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
528  break;
529  case OMA_CODECID_ATRAC3AL:
530  st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
531  st->codecpar->sample_rate = 44100;
532  avpriv_set_pts_info(st, 64, 1, 44100);
533  oc->read_packet = aal_read_packet;
534  framesize = 4096;
535  break;
536  case OMA_CODECID_ATRAC3PAL:
537  st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
538  st->codecpar->sample_rate = 44100;
539  avpriv_set_pts_info(st, 64, 1, 44100);
540  oc->read_packet = aal_read_packet;
541  framesize = 4096;
542  break;
543  default:
544  av_log(s, AV_LOG_ERROR, "Unsupported codec %d!\n", buf[32]);
545  return AVERROR(ENOSYS);
546  }
547 
548  st->codecpar->block_align = framesize;
549 
550  return 0;
551 }
552 
553  static int oma_read_packet(AVFormatContext *s, AVPacket *pkt)
554 {
555  OMAContext *oc = s->priv_data;
556  return oc->read_packet(s, pkt);
557 }
558 
559  static int oma_read_probe(const AVProbeData *p)
560 {
561  const uint8_t *buf = p->buf;
562  unsigned tag_len = 0;
563 
564  if (p->buf_size >= ID3v2_HEADER_SIZE && ff_id3v2_match(buf, ID3v2_EA3_MAGIC))
565  tag_len = ff_id3v2_tag_len(buf);
566 
567  /* This check cannot overflow as tag_len has at most 28 bits */
568  if (p->buf_size < tag_len + 5)
569  /* EA3 header comes late, might be outside of the probe buffer */
570  return tag_len ? AVPROBE_SCORE_EXTENSION/2 : 0;
571 
572  buf += tag_len;
573 
574  if (!memcmp(buf, "EA3", 3) && !buf[4] && buf[5] == EA3_HEADER_SIZE)
575  return AVPROBE_SCORE_MAX;
576  else
577  return 0;
578 }
579 
580  static int oma_read_seek(struct AVFormatContext *s,
581  int stream_index, int64_t timestamp, int flags)
582 {
583  OMAContext *oc = s->priv_data;
584  AVStream *st = s->streams[0];
585  int64_t err;
586 
587  if (st->codecpar->codec_id == AV_CODEC_ID_ATRAC3PAL ||
588  st->codecpar->codec_id == AV_CODEC_ID_ATRAC3AL)
589  return -1;
590 
591  err = ff_pcm_read_seek(s, stream_index, timestamp, flags);
592  if (!oc->encrypted)
593  return err;
594 
595  /* readjust IV for CBC */
596  if (err || avio_tell(s->pb) < oc->content_start)
597  goto wipe;
598  if ((err = avio_seek(s->pb, -8, SEEK_CUR)) < 0)
599  goto wipe;
600  if ((err = avio_read(s->pb, oc->iv, 8)) < 8) {
601  if (err >= 0)
602  err = AVERROR_EOF;
603  goto wipe;
604  }
605 
606  return 0;
607 wipe:
608  memset(oc->iv, 0, 8);
609  return err;
610 }
611 
612  const FFInputFormat ff_oma_demuxer = {
613  .p.name = "oma",
614  .p.long_name = NULL_IF_CONFIG_SMALL("Sony OpenMG audio"),
615  .p.flags = AVFMT_GENERIC_INDEX,
616  .p.extensions = "oma,omg,aa3",
617  .p.codec_tag = ff_oma_codec_tags_list,
618  .priv_data_size = sizeof(OMAContext),
619  .flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
620  .read_probe = oma_read_probe,
621  .read_header = oma_read_header,
622  .read_packet = oma_read_packet,
623  .read_seek = oma_read_seek,
624  .read_close = oma_read_close,
625 };
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:89
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:69
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:205
OMAContext::n_val
uint8_t n_val[24]
Definition: omadec.c:84
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
pcm.h
OMAContext::rid
uint32_t rid
Definition: omadec.c:82
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:51
AV_WL32
#define AV_WL32(p, v)
Definition: intreadwrite.h:422
ID3v2ExtraMeta::next
struct ID3v2ExtraMeta * next
Definition: id3v2.h:86
AV_CHANNEL_LAYOUT_STEREO
#define AV_CHANNEL_LAYOUT_STEREO
Definition: channel_layout.h:387
OMAContext::av_des
struct AVDES * av_des
Definition: omadec.c:90
ff_oma_demuxer
const FFInputFormat ff_oma_demuxer
Definition: omadec.c:612
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const struct AVCodec *c)
Add a new stream to a media file.
ID3v2ExtraMeta::data
union ID3v2ExtraMeta::@381 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
int64_t
long long int64_t
Definition: coverity.c:34
hex_log
static void hex_log(AVFormatContext *s, int level, const char *name, const uint8_t *value, int len)
Definition: omadec.c:102
id3v2.h
AVPacket::data
uint8_t * data
Definition: packet.h:539
ff_oma_srate_tab
const uint16_t ff_oma_srate_tab[8]
Definition: oma.c:26
OMA_ENC_HEADER_SIZE
#define OMA_ENC_HEADER_SIZE
Definition: oma.h:32
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:1140
AV_CODEC_ID_ATRAC3PAL
@ AV_CODEC_ID_ATRAC3PAL
Definition: codec_id.h:523
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:557
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:59
mathematics.h
AVProbeData::buf_size
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:454
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:580
OMAContext::r_val
uint8_t r_val[24]
Definition: omadec.c:83
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:463
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:860
ffstream
static av_always_inline FFStream * ffstream(AVStream *st)
Definition: internal.h:419
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:494
AVFMT_GENERIC_INDEX
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:480
pts
static int64_t pts
Definition: transcode_aac.c:644
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:448
rprobe
static int rprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size, const uint8_t *r_val)
Definition: omadec.c:144
AVRational::num
int num
Numerator.
Definition: rational.h:59
AV_CHANNEL_LAYOUT_SURROUND
#define AV_CHANNEL_LAYOUT_SURROUND
Definition: channel_layout.h:390
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:1193
OMAContext
Definition: omadec.c:75
OMAContext::read_packet
int(* read_packet)(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:92
av_get_bits_per_sample
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:550
OMA_CODECID_ATRAC3
@ OMA_CODECID_ATRAC3
Definition: oma.h:35
avio_rb32
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:761
pkt
AVPacket * pkt
Definition: movenc.c:60
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
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:595
nprobe
static int nprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size, const uint8_t *n_val)
Definition: omadec.c:180
OMAContext::encrypted
int encrypted
Definition: omadec.c:77
ID3v2ExtraMeta
Definition: id3v2.h:84
AV_CHANNEL_LAYOUT_4POINT0
#define AV_CHANNEL_LAYOUT_4POINT0
Definition: channel_layout.h:392
AV_CHANNEL_LAYOUT_7POINT1
#define AV_CHANNEL_LAYOUT_7POINT1
Definition: channel_layout.h:409
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:198
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:553
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:453
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:229
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:80
ID3v2ExtraMetaGEOB::datasize
uint32_t datasize
Definition: id3v2.h:58
FF_INFMT_FLAG_INIT_CLEANUP
#define FF_INFMT_FLAG_INIT_CLEANUP
For an FFInputFormat with this flag set read_close() needs to be called by the caller upon read_heade...
Definition: demux.h:35
FFStream::need_parsing
enum AVStreamParseType need_parsing
Definition: internal.h:386
ID3v2ExtraMeta::tag
const char * tag
Definition: id3v2.h:85
AVFormatContext
Format I/O context.
Definition: avformat.h:1287
av_log_get_level
int av_log_get_level(void)
Get the current log level.
Definition: log.c:442
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:771
OMA_CODECID_ATRAC3P
@ OMA_CODECID_ATRAC3P
Definition: oma.h:36
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:535
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:787
NULL
#define NULL
Definition: coverity.c:32
read_packet
static int read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:325
OMAContext::s_size
uint16_t s_size
Definition: omadec.c:81
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:451
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
Audio only.
Definition: codec_par.h:180
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:461
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:184
AV_CODEC_ID_ATRAC3AL
@ AV_CODEC_ID_ATRAC3AL
Definition: codec_id.h:522
OMAContext::content_start
uint64_t content_start
Definition: omadec.c:76
ID3v2_EA3_MAGIC
#define ID3v2_EA3_MAGIC
Definition: oma.h:31
avio_rb24
unsigned int avio_rb24(AVIOContext *s)
Definition: aviobuf.c:754
OMA_RPROBE_M_VAL
#define OMA_RPROBE_M_VAL
Definition: omadec.c:142
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:94
ff_codec_get_id
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:133
AVChannelLayout
An AVChannelLayout holds information about the channel layout of audio data.
Definition: channel_layout.h:311
OMA_CODECID_ATRAC3PAL
@ OMA_CODECID_ATRAC3PAL
Definition: oma.h:40
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
OMA_CODECID_LPCM
@ OMA_CODECID_LPCM
Definition: oma.h:38
OMA_CODECID_MP3
@ OMA_CODECID_MP3
Definition: oma.h:37
FFInputFormat::p
AVInputFormat p
The public AVInputFormat.
Definition: demux.h:41
header
static const uint8_t header[24]
Definition: sdr2.c:68
aal_read_packet
static int aal_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:363
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:538
AV_WL16
#define AV_WL16(p, v)
Definition: intreadwrite.h:408
AV_WL64
#define AV_WL64(p, v)
Definition: intreadwrite.h:436
kset
static int kset(AVFormatContext *s, const uint8_t *r_val, const uint8_t *n_val, int len)
Definition: omadec.c:113
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:545
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
AV_CHANNEL_LAYOUT_6POINT1_BACK
#define AV_CHANNEL_LAYOUT_6POINT1_BACK
Definition: channel_layout.h:405
OMAContext::s_val
uint8_t s_val[8]
Definition: omadec.c:86
oma_read_close
static int oma_read_close(AVFormatContext *s)
Definition: omadec.c:95
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:532
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:65
AVCodecParameters::block_align
int block_align
Audio only.
Definition: codec_par.h:191
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
demux.h
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:91
oma_read_header
static int oma_read_header(AVFormatContext *s)
Definition: omadec.c:406
OMAContext::k_size
uint16_t k_size
Definition: omadec.c:78
AVDES
Definition: des.h:33
OMA_CODECID_ATRAC3AL
@ OMA_CODECID_ATRAC3AL
Definition: oma.h:41
ff_id3v2_tag_len
int ff_id3v2_tag_len(const uint8_t *buf)
Get the length of an ID3v2 tag.
Definition: id3v2.c:158
tag
uint32_t tag
Definition: movenc.c:1879
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:748
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:231
ff_pcm_read_seek
int ff_pcm_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: pcm.c:73
avio_rb16
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:746
pos
unsigned int pos
Definition: spdifenc.c:414
avformat.h
ID3v2ExtraMetaGEOB::description
uint8_t * description
Definition: id3v2.h:61
channel_layout.h
AVRational::den
int den
Denominator.
Definition: rational.h:60
OMAContext::e_size
uint16_t e_size
Definition: omadec.c:79
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:612
ID3v2ExtraMetaGEOB::data
uint8_t * data
Definition: id3v2.h:62
oma_read_probe
static int oma_read_probe(const AVProbeData *p)
Definition: omadec.c:559
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:597
AVPacket::stream_index
int stream_index
Definition: packet.h:541
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:318
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:444
read_probe
static int read_probe(const AVProbeData *p)
Definition: cdg.c:30
AVCodecParameters::bits_per_coded_sample
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:110
mem.h
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:36
AV_CHANNEL_LAYOUT_MONO
#define AV_CHANNEL_LAYOUT_MONO
Definition: channel_layout.h:386
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:55
AVPacket
This structure stores compressed data.
Definition: packet.h:516
OMAContext::e_val
uint8_t e_val[8]
Definition: omadec.c:88
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:1146
AVPacket::pos
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:559
FFInputFormat
Definition: demux.h:37
AV_CHANNEL_LAYOUT_5POINT1_BACK
#define AV_CHANNEL_LAYOUT_5POINT1_BACK
Definition: channel_layout.h:399
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:482
AVCodecParameters::bit_rate
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:97
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:553
OMAContext::m_val
uint8_t m_val[8]
Definition: omadec.c:85
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:797
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
OMAContext::sm_val
uint8_t sm_val[8]
Definition: omadec.c:87
leaf_table
static const uint64_t leaf_table[]
Definition: omadec.c:58
ff_id3v2_match
int ff_id3v2_match(const uint8_t *buf, const char *magic)
Detect ID3v2 Header.
Definition: id3v2.c:145
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:227
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:346
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