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 "demux.h"
48 #include "internal.h"
49 #include "libavutil/intreadwrite.h"
50 #include "libavutil/des.h"
51 #include "libavutil/mathematics.h"
52 #include "oma.h"
53 #include "pcm.h"
54 #include "id3v2.h"
55 
56 
57  static const uint64_t leaf_table[] = {
58  0xd79e8283acea4620, 0x7a9762f445afd0d8,
59  0x354d60a60b8c79f1, 0x584e1cde00b07aee,
60  0x1573cd93da7df623, 0x47f98d79620dd535
61 };
62 
63 /** map ATRAC-X channel id to internal channel layout */
64  static const AVChannelLayout oma_chid_to_native_layout[7] = {
65  AV_CHANNEL_LAYOUT_MONO,
66  AV_CHANNEL_LAYOUT_STEREO,
67  AV_CHANNEL_LAYOUT_SURROUND,
68  AV_CHANNEL_LAYOUT_4POINT0,
69  AV_CHANNEL_LAYOUT_5POINT1_BACK,
70  AV_CHANNEL_LAYOUT_6POINT1_BACK,
71  AV_CHANNEL_LAYOUT_7POINT1
72 };
73 
74  typedef struct OMAContext {
75   uint64_t content_start;
76   int encrypted;
77   uint16_t k_size;
78   uint16_t e_size;
79   uint16_t i_size;
80   uint16_t s_size;
81   uint32_t rid;
82   uint8_t r_val[24];
83   uint8_t n_val[24];
84   uint8_t m_val[8];
85   uint8_t s_val[8];
86   uint8_t sm_val[8];
87   uint8_t e_val[8];
88   uint8_t iv[8];
89   struct AVDES *av_des;
90 
91   int (*read_packet)(AVFormatContext *s, AVPacket *pkt);
92 } OMAContext;
93 
94  static int oma_read_close(AVFormatContext *s)
95 {
96  OMAContext *oc = s->priv_data;
97  av_freep(&oc->av_des);
98  return 0;
99 }
100 
101  static void hex_log(AVFormatContext *s, int level,
102  const char *name, const uint8_t *value, int len)
103 {
104  char buf[33];
105  len = FFMIN(len, 16);
106  if (av_log_get_level() < level)
107  return;
108  ff_data_to_hex(buf, value, len, 1);
109  av_log(s, level, "%s: %s\n", name, buf);
110 }
111 
112  static int kset(AVFormatContext *s, const uint8_t *r_val, const uint8_t *n_val,
113  int len)
114 {
115  OMAContext *oc = s->priv_data;
116 
117  if (!r_val && !n_val)
118  return -1;
119 
120  len = FFMIN(len, 16);
121 
122  /* use first 64 bits in the third round again */
123  if (r_val) {
124  if (r_val != oc->r_val) {
125  memset(oc->r_val, 0, 24);
126  memcpy(oc->r_val, r_val, len);
127  }
128  memcpy(&oc->r_val[16], r_val, 8);
129  }
130  if (n_val) {
131  if (n_val != oc->n_val) {
132  memset(oc->n_val, 0, 24);
133  memcpy(oc->n_val, n_val, len);
134  }
135  memcpy(&oc->n_val[16], n_val, 8);
136  }
137 
138  return 0;
139 }
140 
141  #define OMA_RPROBE_M_VAL 48 + 1
142 
143  static int rprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size,
144  const uint8_t *r_val)
145 {
146  OMAContext *oc = s->priv_data;
147  unsigned int pos;
148  struct AVDES *av_des;
149 
150  if (!enc_header || !r_val ||
151  size < OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size ||
152  size < OMA_RPROBE_M_VAL)
153  return -1;
154 
155  av_des = av_des_alloc();
156  if (!av_des)
157  return AVERROR(ENOMEM);
158 
159  /* m_val */
160  av_des_init(av_des, r_val, 192, 1);
161  av_des_crypt(av_des, oc->m_val, &enc_header[48], 1, NULL, 1);
162 
163  /* s_val */
164  av_des_init(av_des, oc->m_val, 64, 0);
165  av_des_crypt(av_des, oc->s_val, NULL, 1, NULL, 0);
166 
167  /* sm_val */
168  pos = OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size;
169  av_des_init(av_des, oc->s_val, 64, 0);
170  av_des_mac(av_des, oc->sm_val, &enc_header[pos], (oc->i_size >> 3));
171 
172  pos += oc->i_size;
173 
174  av_free(av_des);
175 
176  return memcmp(&enc_header[pos], oc->sm_val, 8) ? -1 : 0;
177 }
178 
179  static int nprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size,
180  const uint8_t *n_val)
181 {
182  OMAContext *oc = s->priv_data;
183  uint64_t pos;
184  uint32_t taglen, datalen;
185  struct AVDES *av_des;
186 
187  if (!enc_header || !n_val ||
188  size < OMA_ENC_HEADER_SIZE + oc->k_size + 4)
189  return -1;
190 
191  pos = OMA_ENC_HEADER_SIZE + oc->k_size;
192  if (!memcmp(&enc_header[pos], "EKB ", 4))
193  pos += 32;
194 
195  if (size < pos + 44)
196  return -1;
197 
198  if (AV_RB32(&enc_header[pos]) != oc->rid)
199  av_log(s, AV_LOG_DEBUG, "Mismatching RID\n");
200 
201  taglen = AV_RB32(&enc_header[pos + 32]);
202  datalen = AV_RB32(&enc_header[pos + 36]) >> 4;
203 
204  pos += 44LL + taglen;
205 
206  if (pos + (((uint64_t)datalen) << 4) > size)
207  return -1;
208 
209  av_des = av_des_alloc();
210  if (!av_des)
211  return AVERROR(ENOMEM);
212 
213  av_des_init(av_des, n_val, 192, 1);
214  while (datalen-- > 0) {
215  av_des_crypt(av_des, oc->r_val, &enc_header[pos], 2, NULL, 1);
216  kset(s, oc->r_val, NULL, 16);
217  if (!rprobe(s, enc_header, size, oc->r_val)) {
218  av_free(av_des);
219  return 0;
220  }
221  pos += 16;
222  }
223 
224  av_free(av_des);
225  return -1;
226 }
227 
228  static int decrypt_init(AVFormatContext *s, ID3v2ExtraMeta *em, uint8_t *header)
229 {
230  OMAContext *oc = s->priv_data;
231  ID3v2ExtraMetaGEOB *geob = NULL;
232  uint8_t *gdata;
233 
234  oc->encrypted = 1;
235  av_log(s, AV_LOG_INFO, "File is encrypted\n");
236 
237  /* find GEOB metadata */
238  for (; em; em = em->next) {
239  if (strcmp(em->tag, "GEOB"))
240  continue;
241  geob = &em->data.geob;
242  if (!strcmp(geob->description, "OMG_LSI") ||
243  !strcmp(geob->description, "OMG_BKLSI"))
244  break;
245  }
246  if (!em) {
247  av_log(s, AV_LOG_ERROR, "No encryption header found\n");
248  return AVERROR_INVALIDDATA;
249  }
250 
251  if (geob->datasize < 64) {
252  av_log(s, AV_LOG_ERROR,
253  "Invalid GEOB data size: %"PRIu32"\n", geob->datasize);
254  return AVERROR_INVALIDDATA;
255  }
256 
257  gdata = geob->data;
258 
259  if (AV_RB16(gdata) != 1)
260  av_log(s, AV_LOG_WARNING, "Unknown version in encryption header\n");
261 
262  oc->k_size = AV_RB16(&gdata[2]);
263  oc->e_size = AV_RB16(&gdata[4]);
264  oc->i_size = AV_RB16(&gdata[6]);
265  oc->s_size = AV_RB16(&gdata[8]);
266 
267  if (memcmp(&gdata[OMA_ENC_HEADER_SIZE], "KEYRING ", 12)) {
268  av_log(s, AV_LOG_ERROR, "Invalid encryption header\n");
269  return AVERROR_INVALIDDATA;
270  }
271  if (OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size + 8 > geob->datasize ||
272  OMA_ENC_HEADER_SIZE + 48 > geob->datasize) {
273  av_log(s, AV_LOG_ERROR, "Too little GEOB data\n");
274  return AVERROR_INVALIDDATA;
275  }
276  oc->rid = AV_RB32(&gdata[OMA_ENC_HEADER_SIZE + 28]);
277  av_log(s, AV_LOG_DEBUG, "RID: %.8"PRIx32"\n", oc->rid);
278 
279  memcpy(oc->iv, &header[0x58], 8);
280  hex_log(s, AV_LOG_DEBUG, "IV", oc->iv, 8);
281 
282  hex_log(s, AV_LOG_DEBUG, "CBC-MAC",
283  &gdata[OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size],
284  8);
285 
286  if (s->keylen > 0) {
287  kset(s, s->key, s->key, s->keylen);
288  }
289  if (!memcmp(oc->r_val, (const uint8_t[8]){0}, 8) ||
290  rprobe(s, gdata, geob->datasize, oc->r_val) < 0 &&
291  nprobe(s, gdata, geob->datasize, oc->n_val) < 0) {
292  int i;
293  for (i = 0; i < FF_ARRAY_ELEMS(leaf_table); i += 2) {
294  uint8_t buf[16];
295  AV_WL64(buf, leaf_table[i]);
296  AV_WL64(&buf[8], leaf_table[i + 1]);
297  kset(s, buf, buf, 16);
298  if (!rprobe(s, gdata, geob->datasize, oc->r_val) ||
299  !nprobe(s, gdata, geob->datasize, oc->n_val))
300  break;
301  }
302  if (i >= FF_ARRAY_ELEMS(leaf_table)) {
303  av_log(s, AV_LOG_ERROR, "Invalid key\n");
304  return AVERROR_INVALIDDATA;
305  }
306  }
307 
308  oc->av_des = av_des_alloc();
309  if (!oc->av_des)
310  return AVERROR(ENOMEM);
311 
312  /* e_val */
313  av_des_init(oc->av_des, oc->m_val, 64, 0);
314  av_des_crypt(oc->av_des, oc->e_val,
315  &gdata[OMA_ENC_HEADER_SIZE + 40], 1, NULL, 0);
316  hex_log(s, AV_LOG_DEBUG, "EK", oc->e_val, 8);
317 
318  /* init e_val */
319  av_des_init(oc->av_des, oc->e_val, 64, 1);
320 
321  return 0;
322 }
323 
324  static int read_packet(AVFormatContext *s, AVPacket *pkt)
325 {
326  OMAContext *oc = s->priv_data;
327  AVStream *st = s->streams[0];
328  int packet_size = st->codecpar->block_align;
329  int byte_rate = st->codecpar->bit_rate >> 3;
330  int64_t pos = avio_tell(s->pb);
331  int ret = av_get_packet(s->pb, pkt, packet_size);
332 
333  if (ret < packet_size)
334  pkt->flags |= AV_PKT_FLAG_CORRUPT;
335 
336  if (ret < 0)
337  return ret;
338  if (!ret)
339  return AVERROR_EOF;
340 
341  pkt->stream_index = 0;
342 
343  if (pos >= oc->content_start && byte_rate > 0) {
344  pkt->pts =
345  pkt->dts = av_rescale(pos - oc->content_start, st->time_base.den,
346  byte_rate * (int64_t)st->time_base.num);
347  }
348 
349  if (oc->encrypted) {
350  /* previous unencrypted block saved in IV for
351  * the next packet (CBC mode) */
352  if (ret == packet_size)
353  av_des_crypt(oc->av_des, pkt->data, pkt->data,
354  (packet_size >> 3), oc->iv, 1);
355  else
356  memset(oc->iv, 0, 8);
357  }
358 
359  return ret;
360 }
361 
362  static int aal_read_packet(AVFormatContext *s, AVPacket *pkt)
363 {
364  int64_t pos = avio_tell(s->pb);
365  int ret, pts;
366  int packet_size;
367  unsigned tag;
368 
369  if (avio_feof(s->pb))
370  return AVERROR_EOF;
371 
372  tag = avio_rb24(s->pb);
373  if (tag == 0)
374  return AVERROR_EOF;
375  else if (tag != MKBETAG(0,'B','L','K'))
376  return AVERROR_INVALIDDATA;
377 
378  avio_skip(s->pb, 1);
379  packet_size = avio_rb16(s->pb);
380  avio_skip(s->pb, 2);
381  pts = avio_rb32(s->pb);
382  avio_skip(s->pb, 12);
383  ret = av_get_packet(s->pb, pkt, packet_size);
384  if (ret < packet_size)
385  pkt->flags |= AV_PKT_FLAG_CORRUPT;
386 
387  if (ret < 0)
388  return ret;
389  if (!ret)
390  return AVERROR_EOF;
391 
392  pkt->stream_index = 0;
393  pkt->pos = pos;
394  if (s->streams[0]->codecpar->codec_id == AV_CODEC_ID_ATRAC3AL) {
395  pkt->duration = 1024;
396  pkt->pts = pts * 1024LL;
397  } else {
398  pkt->duration = 2048;
399  pkt->pts = pts * 2048LL;
400  }
401 
402  return ret;
403 }
404 
405  static int oma_read_header(AVFormatContext *s)
406 {
407  int ret, framesize, jsflag, samplerate;
408  uint32_t codec_params, channel_id;
409  int16_t eid;
410  uint8_t buf[EA3_HEADER_SIZE];
411  uint8_t *edata;
412  AVStream *st;
413  ID3v2ExtraMeta *extra_meta;
414  OMAContext *oc = s->priv_data;
415 
416  ff_id3v2_read(s, ID3v2_EA3_MAGIC, &extra_meta, 0);
417  if ((ret = ff_id3v2_parse_chapters(s, extra_meta)) < 0) {
418  ff_id3v2_free_extra_meta(&extra_meta);
419  return ret;
420  }
421 
422  ret = avio_read(s->pb, buf, EA3_HEADER_SIZE);
423  if (ret < EA3_HEADER_SIZE) {
424  ff_id3v2_free_extra_meta(&extra_meta);
425  return -1;
426  }
427 
428  if (memcmp(buf, ((const uint8_t[]){'E', 'A', '3'}), 3) ||
429  buf[4] != 0 || buf[5] != EA3_HEADER_SIZE) {
430  ff_id3v2_free_extra_meta(&extra_meta);
431  av_log(s, AV_LOG_ERROR, "Couldn't find the EA3 header !\n");
432  return AVERROR_INVALIDDATA;
433  }
434 
435  oc->content_start = avio_tell(s->pb);
436 
437  /* encrypted file */
438  eid = AV_RB16(&buf[6]);
439  if (eid != -1 && eid != -128 && decrypt_init(s, extra_meta, buf) < 0) {
440  ff_id3v2_free_extra_meta(&extra_meta);
441  return -1;
442  }
443 
444  ff_id3v2_free_extra_meta(&extra_meta);
445 
446  codec_params = AV_RB24(&buf[33]);
447 
448  st = avformat_new_stream(s, NULL);
449  if (!st)
450  return AVERROR(ENOMEM);
451 
452  st->start_time = 0;
453  st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
454  st->codecpar->codec_tag = buf[32];
455  st->codecpar->codec_id = ff_codec_get_id(ff_oma_codec_tags,
456  st->codecpar->codec_tag);
457 
458  oc->read_packet = read_packet;
459 
460  switch (buf[32]) {
461  case OMA_CODECID_ATRAC3:
462  samplerate = ff_oma_srate_tab[(codec_params >> 13) & 7] * 100;
463  if (!samplerate) {
464  av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
465  return AVERROR_INVALIDDATA;
466  }
467  if (samplerate != 44100)
468  avpriv_request_sample(s, "Sample rate %d", samplerate);
469 
470  framesize = (codec_params & 0x3FF) * 8;
471 
472  /* get stereo coding mode, 1 for joint-stereo */
473  jsflag = (codec_params >> 17) & 1;
474 
475  st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
476  st->codecpar->sample_rate = samplerate;
477  st->codecpar->bit_rate = st->codecpar->sample_rate * framesize / (1024 / 8);
478 
479  /* fake the ATRAC3 extradata
480  * (wav format, makes stream copy to wav work) */
481  if ((ret = ff_alloc_extradata(st->codecpar, 14)) < 0)
482  return ret;
483 
484  edata = st->codecpar->extradata;
485  AV_WL16(&edata[0], 1); // always 1
486  AV_WL32(&edata[2], samplerate); // samples rate
487  AV_WL16(&edata[6], jsflag); // coding mode
488  AV_WL16(&edata[8], jsflag); // coding mode
489  AV_WL16(&edata[10], 1); // always 1
490  AV_WL16(&edata[12], 0); // always 0
491 
492  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
493  break;
494  case OMA_CODECID_ATRAC3P:
495  channel_id = (codec_params >> 10) & 7;
496  if (!channel_id) {
497  av_log(s, AV_LOG_ERROR,
498  "Invalid ATRAC-X channel id: %"PRIu32"\n", channel_id);
499  return AVERROR_INVALIDDATA;
500  }
501  av_channel_layout_copy(&st->codecpar->ch_layout,
502  &oma_chid_to_native_layout[channel_id - 1]);
503  framesize = ((codec_params & 0x3FF) * 8) + 8;
504  samplerate = ff_oma_srate_tab[(codec_params >> 13) & 7] * 100;
505  if (!samplerate) {
506  av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
507  return AVERROR_INVALIDDATA;
508  }
509  st->codecpar->sample_rate = samplerate;
510  st->codecpar->bit_rate = samplerate * framesize / (2048 / 8);
511  avpriv_set_pts_info(st, 64, 1, samplerate);
512  break;
513  case OMA_CODECID_MP3:
514  ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL_RAW;
515  framesize = 1024;
516  break;
517  case OMA_CODECID_LPCM:
518  /* PCM 44.1 kHz 16 bit stereo big-endian */
519  st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
520  st->codecpar->sample_rate = 44100;
521  framesize = 1024;
522  /* bit rate = sample rate x PCM block align (= 4) x 8 */
523  st->codecpar->bit_rate = st->codecpar->sample_rate * 32;
524  st->codecpar->bits_per_coded_sample =
525  av_get_bits_per_sample(st->codecpar->codec_id);
526  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
527  break;
528  case OMA_CODECID_ATRAC3AL:
529  st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
530  st->codecpar->sample_rate = 44100;
531  avpriv_set_pts_info(st, 64, 1, 44100);
532  oc->read_packet = aal_read_packet;
533  framesize = 4096;
534  break;
535  case OMA_CODECID_ATRAC3PAL:
536  st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
537  st->codecpar->sample_rate = 44100;
538  avpriv_set_pts_info(st, 64, 1, 44100);
539  oc->read_packet = aal_read_packet;
540  framesize = 4096;
541  break;
542  default:
543  av_log(s, AV_LOG_ERROR, "Unsupported codec %d!\n", buf[32]);
544  return AVERROR(ENOSYS);
545  }
546 
547  st->codecpar->block_align = framesize;
548 
549  return 0;
550 }
551 
552  static int oma_read_packet(AVFormatContext *s, AVPacket *pkt)
553 {
554  OMAContext *oc = s->priv_data;
555  return oc->read_packet(s, pkt);
556 }
557 
558  static int oma_read_probe(const AVProbeData *p)
559 {
560  const uint8_t *buf = p->buf;
561  unsigned tag_len = 0;
562 
563  if (p->buf_size >= ID3v2_HEADER_SIZE && ff_id3v2_match(buf, ID3v2_EA3_MAGIC))
564  tag_len = ff_id3v2_tag_len(buf);
565 
566  /* This check cannot overflow as tag_len has at most 28 bits */
567  if (p->buf_size < tag_len + 5)
568  /* EA3 header comes late, might be outside of the probe buffer */
569  return tag_len ? AVPROBE_SCORE_EXTENSION/2 : 0;
570 
571  buf += tag_len;
572 
573  if (!memcmp(buf, "EA3", 3) && !buf[4] && buf[5] == EA3_HEADER_SIZE)
574  return AVPROBE_SCORE_MAX;
575  else
576  return 0;
577 }
578 
579  static int oma_read_seek(struct AVFormatContext *s,
580  int stream_index, int64_t timestamp, int flags)
581 {
582  OMAContext *oc = s->priv_data;
583  AVStream *st = s->streams[0];
584  int64_t err;
585 
586  if (st->codecpar->codec_id == AV_CODEC_ID_ATRAC3PAL ||
587  st->codecpar->codec_id == AV_CODEC_ID_ATRAC3AL)
588  return -1;
589 
590  err = ff_pcm_read_seek(s, stream_index, timestamp, flags);
591  if (!oc->encrypted)
592  return err;
593 
594  /* readjust IV for CBC */
595  if (err || avio_tell(s->pb) < oc->content_start)
596  goto wipe;
597  if ((err = avio_seek(s->pb, -8, SEEK_CUR)) < 0)
598  goto wipe;
599  if ((err = avio_read(s->pb, oc->iv, 8)) < 8) {
600  if (err >= 0)
601  err = AVERROR_EOF;
602  goto wipe;
603  }
604 
605  return 0;
606 wipe:
607  memset(oc->iv, 0, 8);
608  return err;
609 }
610 
611  const FFInputFormat ff_oma_demuxer = {
612  .p.name = "oma",
613  .p.long_name = NULL_IF_CONFIG_SMALL("Sony OpenMG audio"),
614  .p.flags = AVFMT_GENERIC_INDEX,
615  .p.extensions = "oma,omg,aa3",
616  .p.codec_tag = ff_oma_codec_tags_list,
617  .priv_data_size = sizeof(OMAContext),
618  .flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
619  .read_probe = oma_read_probe,
620  .read_header = oma_read_header,
621  .read_packet = oma_read_packet,
622  .read_seek = oma_read_seek,
623  .read_close = oma_read_close,
624 };
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:88
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:204
OMAContext::n_val
uint8_t n_val[24]
Definition: omadec.c:83
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:81
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:424
ID3v2ExtraMeta::next
struct ID3v2ExtraMeta * next
Definition: id3v2.h:86
AV_CHANNEL_LAYOUT_STEREO
#define AV_CHANNEL_LAYOUT_STEREO
Definition: channel_layout.h:379
OMAContext::av_des
struct AVDES * av_des
Definition: omadec.c:89
ff_oma_demuxer
const FFInputFormat ff_oma_demuxer
Definition: omadec.c:611
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const struct AVCodec *c)
Add a new stream to a media file.
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:101
id3v2.h
AVPacket::data
uint8_t * data
Definition: packet.h:522
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
OMA_CODECID_ATRAC3P
@ OMA_CODECID_ATRAC3P
Definition: oma.h:36
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:1139
OMA_CODECID_ATRAC3PAL
@ OMA_CODECID_ATRAC3PAL
Definition: oma.h:40
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:540
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:579
OMAContext::r_val
uint8_t r_val[24]
Definition: omadec.c:82
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:463
OMA_CODECID_ATRAC3AL
@ OMA_CODECID_ATRAC3AL
Definition: oma.h:41
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:853
ffstream
static av_always_inline FFStream * ffstream(AVStream *st)
Definition: internal.h:417
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:643
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:455
rprobe
static int rprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size, const uint8_t *r_val)
Definition: omadec.c:143
AVRational::num
int num
Numerator.
Definition: rational.h:59
AV_CHANNEL_LAYOUT_SURROUND
#define AV_CHANNEL_LAYOUT_SURROUND
Definition: channel_layout.h:382
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:1192
OMAContext
Definition: omadec.c:74
OMAContext::read_packet
int(* read_packet)(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:91
av_get_bits_per_sample
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:550
avio_rb32
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:760
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
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:578
nprobe
static int nprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size, const uint8_t *n_val)
Definition: omadec.c:179
OMAContext::encrypted
int encrypted
Definition: omadec.c:76
ID3v2ExtraMeta
Definition: id3v2.h:84
AV_CHANNEL_LAYOUT_4POINT0
#define AV_CHANNEL_LAYOUT_4POINT0
Definition: channel_layout.h:384
AV_CHANNEL_LAYOUT_7POINT1
#define AV_CHANNEL_LAYOUT_7POINT1
Definition: channel_layout.h:401
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
ID3v2ExtraMeta::data
union ID3v2ExtraMeta::@316 data
decrypt_init
static int decrypt_init(AVFormatContext *s, ID3v2ExtraMeta *em, uint8_t *header)
Definition: omadec.c:228
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:79
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:1255
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:766
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:550
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:782
NULL
#define NULL
Definition: coverity.c:32
read_packet
static int read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: omadec.c:324
OMAContext::s_size
uint16_t s_size
Definition: omadec.c:80
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
OMA_CODECID_ATRAC3
@ OMA_CODECID_ATRAC3
Definition: oma.h:35
AV_CODEC_ID_ATRAC3AL
@ AV_CODEC_ID_ATRAC3AL
Definition: codec_id.h:522
OMAContext::content_start
uint64_t content_start
Definition: omadec.c:75
ID3v2_EA3_MAGIC
#define ID3v2_EA3_MAGIC
Definition: oma.h:31
avio_rb24
unsigned int avio_rb24(AVIOContext *s)
Definition: aviobuf.c:753
OMA_RPROBE_M_VAL
#define OMA_RPROBE_M_VAL
Definition: omadec.c:141
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:106
ff_codec_get_id
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:145
AVChannelLayout
An AVChannelLayout holds information about the channel layout of audio data.
Definition: channel_layout.h:303
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
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:362
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:521
AV_WL16
#define AV_WL16(p, v)
Definition: intreadwrite.h:410
AV_WL64
#define AV_WL64(p, v)
Definition: intreadwrite.h:438
kset
static int kset(AVFormatContext *s, const uint8_t *r_val, const uint8_t *n_val, int len)
Definition: omadec.c:112
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:528
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:397
OMAContext::s_val
uint8_t s_val[8]
Definition: omadec.c:85
oma_read_close
static int oma_read_close(AVFormatContext *s)
Definition: omadec.c:94
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:255
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:515
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:64
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:103
oma_read_header
static int oma_read_header(AVFormatContext *s)
Definition: omadec.c:405
OMAContext::k_size
uint16_t k_size
Definition: omadec.c:77
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:1791
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:743
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:230
ff_pcm_read_seek
int ff_pcm_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: pcm.c:73
OMA_CODECID_LPCM
@ OMA_CODECID_LPCM
Definition: oma.h:38
avio_rb16
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:745
pos
unsigned int pos
Definition: spdifenc.c:413
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:78
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:611
ID3v2ExtraMetaGEOB::data
uint8_t * data
Definition: id3v2.h:62
oma_read_probe
static int oma_read_probe(const AVProbeData *p)
Definition: omadec.c:558
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:524
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:317
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:439
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
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:378
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:499
OMAContext::e_val
uint8_t e_val[8]
Definition: omadec.c:87
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:1145
AVPacket::pos
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:542
FFInputFormat
Definition: demux.h:37
AV_CHANNEL_LAYOUT_5POINT1_BACK
#define AV_CHANNEL_LAYOUT_5POINT1_BACK
Definition: channel_layout.h:391
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:552
OMAContext::m_val
uint8_t m_val[8]
Definition: omadec.c:84
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:792
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:409
OMAContext::sm_val
uint8_t sm_val[8]
Definition: omadec.c:86
leaf_table
static const uint64_t leaf_table[]
Definition: omadec.c:57
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:239
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:345
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