FFmpeg  4.3.8
vividas.c
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1 /*
2  * Vividas VIV format Demuxer
3  * Copyright (c) 2012 Krzysztof Klinikowski
4  * Copyright (c) 2010 Andrzej Szombierski
5  * based on vivparse Copyright (c) 2007 Måns Rullgård
6  *
7  * This file is part of FFmpeg.
8  *
9  * FFmpeg is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * FFmpeg is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with FFmpeg; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22  */
23 
24 /**
25  * @file
26  * @brief Vividas VIV (.viv) file demuxer
27  * @author Andrzej Szombierski [qq at kuku eu org] (2010-07)
28  * @sa http://wiki.multimedia.cx/index.php?title=Vividas_VIV
29  */
30 
31 #include "libavutil/avassert.h"
32 #include "libavutil/intreadwrite.h"
33 #include "avio_internal.h"
34 #include "avformat.h"
35 #include "internal.h"
36 
37 #define MAX_AUDIO_SUBPACKETS 100
38 
39 typedef struct VIV_SB_block {
43 } VIV_SB_block;
44 
45 typedef struct VIV_SB_entry {
46  int size, flag;
47 } VIV_SB_entry;
48 
49 typedef struct VIV_AudioSubpacket {
50  int start, pcm_bytes;
52 
53 typedef struct VividasDemuxContext {
56  int num_audio;
57 
58  uint32_t sb_key;
60 
61  int current_sb, current_sb_entry;
66 
69 
71 
74 
75 static int viv_probe(const AVProbeData *p)
76 {
77  if (memcmp(p->buf, "vividas03", 9))
78  return 0;
79 
80  return AVPROBE_SCORE_MAX;
81 }
82 
83 static const uint8_t keybits[32] = {
84  20, 52, 111, 10, 27, 71, 142, 53,
85  82, 138, 1, 78, 86, 121, 183, 85,
86 105, 152, 39, 140, 172, 11, 64, 144,
87 155, 6, 71, 163, 186, 49, 126, 43,
88 };
89 
90 static uint32_t decode_key(uint8_t *buf)
91 {
92  uint32_t key = 0;
93 
94  for (int i = 0; i < 32; i++) {
95  unsigned p = keybits[i];
96  key |= ((buf[p] >> ((i*5+3)&7)) & 1u) << i;
97  }
98 
99  return key;
100 }
101 
102 static void put_v(uint8_t *p, unsigned v)
103 {
104  if (v>>28)
105  *p++ = ((v>>28)&0x7f)|0x80;
106  if (v>>21)
107  *p++ = ((v>>21)&0x7f)|0x80;
108  if (v>>14)
109  *p++ = ((v>>14)&0x7f)|0x80;
110  if (v>>7)
111  *p++ = ((v>>7)&0x7f)|0x80;
112 }
113 
114 static unsigned recover_key(unsigned char sample[4], unsigned expected_size)
115 {
116  unsigned char plaintext[8] = { 'S', 'B' };
117 
118  put_v(plaintext+2, expected_size);
119 
120  return AV_RL32(sample) ^ AV_RL32(plaintext);
121 }
122 
123 static void xor_block(void *p1, void *p2, unsigned size, int key, unsigned *key_ptr)
124 {
125  unsigned *d1 = p1;
126  unsigned *d2 = p2;
127  unsigned k = *key_ptr;
128 
129  size >>= 2;
130 
131  while (size > 0) {
132  *d2 = *d1 ^ (HAVE_BIGENDIAN ? av_bswap32(k) : k);
133  k += key;
134  d1++;
135  d2++;
136  size--;
137  }
138 
139  *key_ptr = k;
140 }
141 
142 static void decode_block(uint8_t *src, uint8_t *dest, unsigned size,
143  uint32_t key, uint32_t *key_ptr,
144  int align)
145 {
146  unsigned s = size;
147  char tmp[4];
148  int a2;
149 
150  if (!size)
151  return;
152 
153  align &= 3;
154  a2 = (4 - align) & 3;
155 
156  if (align) {
157  uint32_t tmpkey = *key_ptr - key;
158  if (a2 > s) {
159  a2 = s;
160  avpriv_request_sample(NULL, "tiny aligned block\n");
161  }
162  memcpy(tmp + align, src, a2);
163  xor_block(tmp, tmp, 4, key, &tmpkey);
164  memcpy(dest, tmp + align, a2);
165  s -= a2;
166  }
167 
168  if (s >= 4) {
169  xor_block(src + a2, dest + a2, s & ~3,
170  key, key_ptr);
171  s &= 3;
172  }
173 
174  if (s) {
175  size -= s;
176  memcpy(tmp, src + size, s);
177  xor_block(&tmp, &tmp, 4, key, key_ptr);
178  memcpy(dest + size, tmp, s);
179  }
180 }
181 
182 static uint32_t get_v(uint8_t *p, int len)
183 {
184  uint32_t v = 0;
185  const uint8_t *end = p + len;
186 
187  do {
188  if (p >= end || v >= UINT_MAX / 128 - *p)
189  return v;
190  v <<= 7;
191  v += *p & 0x7f;
192  } while (*p++ & 0x80);
193 
194  return v;
195 }
196 
197 static uint8_t *read_vblock(AVIOContext *src, uint32_t *size,
198  uint32_t key, uint32_t *k2, int align)
199 {
200  uint8_t tmp[4];
201  uint8_t *buf;
202  unsigned n;
203 
204  if (avio_read(src, tmp, 4) != 4)
205  return NULL;
206 
207  decode_block(tmp, tmp, 4, key, k2, align);
208 
209  n = get_v(tmp, 4);
210  if (n < 4)
211  return NULL;
212 
213  buf = av_malloc(n);
214  if (!buf)
215  return NULL;
216 
217  *size = n;
218  n -= 4;
219 
220  memcpy(buf, tmp, 4);
221 
222  if (avio_read(src, buf + 4, n) == n) {
223  decode_block(buf + 4, buf + 4, n, key, k2, align);
224  } else {
225  av_free(buf);
226  buf = NULL;
227  }
228 
229  return buf;
230 }
231 
233  uint32_t *key, unsigned expected_size)
234 {
235  uint8_t *buf;
236  uint8_t ibuf[8], sbuf[8];
237  uint32_t k2;
238  unsigned n;
239 
240  if (avio_read(src, ibuf, 8) < 8)
241  return NULL;
242 
243  k2 = *key;
244  decode_block(ibuf, sbuf, 8, *key, &k2, 0);
245 
246  n = get_v(sbuf+2, 6);
247 
248  if (sbuf[0] != 'S' || sbuf[1] != 'B' || (expected_size>0 && n != expected_size)) {
249  uint32_t tmpkey = recover_key(ibuf, expected_size);
250  k2 = tmpkey;
251  decode_block(ibuf, sbuf, 8, tmpkey, &k2, 0);
252  n = get_v(sbuf+2, 6);
253  if (sbuf[0] != 'S' || sbuf[1] != 'B' || expected_size != n)
254  return NULL;
255  *key = tmpkey;
256  }
257 
258  if (n < 8)
259  return NULL;
260 
261  buf = av_malloc(n);
262  if (!buf)
263  return NULL;
264 
265  memcpy(buf, sbuf, 8);
266 
267  *size = n;
268  n -= 8;
269 
270  if (avio_read(src, buf+8, n) != n) {
271  av_free(buf);
272  return NULL;
273  }
274 
275  decode_block(buf + 8, buf + 8, n, *key, &k2, 0);
276 
277  return buf;
278 }
279 
281 {
282  int i, j, ret;
283  int64_t off;
284  int val_1;
285  int num_video;
286  AVIOContext pb0, *pb = &pb0;
287 
288  ffio_init_context(pb, buf, size, 0, NULL, NULL, NULL, NULL);
289 
290  ffio_read_varlen(pb); // track_header_len
291  avio_r8(pb); // '1'
292 
293  val_1 = ffio_read_varlen(pb);
294 
295  for (i=0;i<val_1;i++) {
296  int c = avio_r8(pb);
297  if (avio_feof(pb))
298  return AVERROR_EOF;
299  for (j=0;j<c;j++) {
300  if (avio_feof(pb))
301  return AVERROR_EOF;
302  avio_r8(pb); // val_3
303  avio_r8(pb); // val_4
304  }
305  }
306 
307  avio_r8(pb); // num_streams
308 
309  off = avio_tell(pb);
310  off += ffio_read_varlen(pb); // val_5
311 
312  avio_r8(pb); // '2'
313  num_video = avio_r8(pb);
314 
315  avio_seek(pb, off, SEEK_SET);
316  if (num_video != 1) {
317  av_log(s, AV_LOG_ERROR, "number of video tracks %d is not 1\n", num_video);
318  return AVERROR_PATCHWELCOME;
319  }
320 
321  for (i = 0; i < num_video; i++) {
323  int num, den;
324 
325  if (!st)
326  return AVERROR(ENOMEM);
327 
328  st->id = i;
329 
332 
333  off = avio_tell(pb);
334  off += ffio_read_varlen(pb);
335  avio_r8(pb); // '3'
336  avio_r8(pb); // val_7
337  num = avio_rl32(pb); // frame_time
338  den = avio_rl32(pb); // time_base
339  avpriv_set_pts_info(st, 64, num, den);
340  st->nb_frames = avio_rl32(pb); // n frames
341  st->codecpar->width = avio_rl16(pb); // width
342  st->codecpar->height = avio_rl16(pb); // height
343  avio_r8(pb); // val_8
344  avio_rl32(pb); // val_9
345 
346  avio_seek(pb, off, SEEK_SET);
347  }
348 
349  off = avio_tell(pb);
350  off += ffio_read_varlen(pb); // val_10
351  avio_r8(pb); // '4'
352  viv->num_audio = avio_r8(pb);
353  avio_seek(pb, off, SEEK_SET);
354 
355  if (viv->num_audio != 1)
356  av_log(s, AV_LOG_WARNING, "number of audio tracks %d is not 1\n", viv->num_audio);
357 
358  for(i=0;i<viv->num_audio;i++) {
359  int q;
361  if (!st)
362  return AVERROR(ENOMEM);
363 
364  st->id = num_video + i;
365 
368 
369  off = avio_tell(pb);
370  off += ffio_read_varlen(pb); // length
371  avio_r8(pb); // '5'
372  avio_r8(pb); //codec_id
373  avio_rl16(pb); //codec_subid
374  st->codecpar->channels = avio_rl16(pb); // channels
375  st->codecpar->sample_rate = avio_rl32(pb); // sample_rate
376  if (st->codecpar->sample_rate <= 0 || st->codecpar->channels <= 0)
377  return AVERROR_INVALIDDATA;
378  avio_seek(pb, 10, SEEK_CUR); // data_1
379  q = avio_r8(pb);
380  avio_seek(pb, q, SEEK_CUR); // data_2
381  avio_r8(pb); // zeropad
382 
383  if (avio_tell(pb) < off) {
384  int num_data;
385  int xd_size = 1;
386  int data_len[256];
387  int offset = 1;
388  uint8_t *p;
389  ffio_read_varlen(pb); // val_13
390  avio_r8(pb); // '19'
391  ffio_read_varlen(pb); // len_3
392  num_data = avio_r8(pb);
393  for (j = 0; j < num_data; j++) {
395  if (len < 0 || len > INT_MAX/2 - xd_size) {
396  return AVERROR_INVALIDDATA;
397  }
398  data_len[j] = len;
399  xd_size += len + 1 + len/255;
400  }
401 
402  ret = ff_alloc_extradata(st->codecpar, xd_size);
403  if (ret < 0)
404  return ret;
405 
406  p = st->codecpar->extradata;
407  p[0] = 2;
408 
409  for (j = 0; j < num_data - 1; j++) {
410  unsigned delta = av_xiphlacing(&p[offset], data_len[j]);
411  av_assert0(delta <= xd_size - offset);
412  offset += delta;
413  }
414 
415  for (j = 0; j < num_data; j++) {
416  int ret = avio_read(pb, &p[offset], data_len[j]);
417  if (ret < data_len[j]) {
418  st->codecpar->extradata_size = 0;
419  av_freep(&st->codecpar->extradata);
420  break;
421  }
422  av_assert0(data_len[j] <= xd_size - offset);
423  offset += data_len[j];
424  }
425 
426  if (offset < st->codecpar->extradata_size)
428  }
429  }
430 
431  return 0;
432 }
433 
434 static int track_index(VividasDemuxContext *viv, AVFormatContext *s, uint8_t *buf, unsigned size)
435 {
436  int64_t off;
437  int64_t poff;
438  int maxnp=0;
439  AVIOContext pb0, *pb = &pb0;
440  int i;
441  int64_t filesize = avio_size(s->pb);
442  uint64_t n_sb_blocks_tmp;
443 
444  ffio_init_context(pb, buf, size, 0, NULL, NULL, NULL, NULL);
445 
446  ffio_read_varlen(pb); // track_index_len
447  avio_r8(pb); // 'c'
448  n_sb_blocks_tmp = ffio_read_varlen(pb);
449  if (n_sb_blocks_tmp > size / 2)
450  return AVERROR_INVALIDDATA;
451  viv->sb_blocks = av_calloc(n_sb_blocks_tmp, sizeof(*viv->sb_blocks));
452  if (!viv->sb_blocks) {
453  return AVERROR(ENOMEM);
454  }
455  viv->n_sb_blocks = n_sb_blocks_tmp;
456 
457  off = 0;
458  poff = 0;
459 
460  for (i = 0; i < viv->n_sb_blocks; i++) {
461  uint64_t size_tmp = ffio_read_varlen(pb);
462  uint64_t n_packets_tmp = ffio_read_varlen(pb);
463 
464  if (size_tmp > INT_MAX || n_packets_tmp > INT_MAX)
465  return AVERROR_INVALIDDATA;
466 
467  viv->sb_blocks[i].byte_offset = off;
468  viv->sb_blocks[i].packet_offset = poff;
469 
470  viv->sb_blocks[i].size = size_tmp;
471  viv->sb_blocks[i].n_packets = n_packets_tmp;
472 
473  off += viv->sb_blocks[i].size;
474  poff += viv->sb_blocks[i].n_packets;
475 
476  if (maxnp < viv->sb_blocks[i].n_packets)
477  maxnp = viv->sb_blocks[i].n_packets;
478  }
479 
480  if (filesize > 0 && poff > filesize)
481  return AVERROR_INVALIDDATA;
482 
483  viv->sb_entries = av_calloc(maxnp, sizeof(VIV_SB_entry));
484  if (!viv->sb_entries)
485  return AVERROR(ENOMEM);
486 
487  return 0;
488 }
489 
490 static void load_sb_block(AVFormatContext *s, VividasDemuxContext *viv, unsigned expected_size)
491 {
492  uint32_t size = 0;
493  int i;
494  AVIOContext *pb = 0;
495 
496  if (viv->sb_pb) {
497  av_free(viv->sb_pb);
498  viv->sb_pb = NULL;
499  }
500 
501  if (viv->sb_buf)
502  av_free(viv->sb_buf);
503 
504  viv->sb_buf = read_sb_block(s->pb, &size, &viv->sb_key, expected_size);
505  if (!viv->sb_buf) {
506  return;
507  }
508 
509  pb = avio_alloc_context(viv->sb_buf, size, 0, NULL, NULL, NULL, NULL);
510  if (!pb)
511  return;
512 
513  viv->sb_pb = pb;
514 
515  avio_r8(pb); // 'S'
516  avio_r8(pb); // 'B'
517  ffio_read_varlen(pb); // size
518  avio_r8(pb); // junk
519  ffio_read_varlen(pb); // first packet
520 
521  viv->n_sb_entries = viv->sb_blocks[viv->current_sb].n_packets;
522 
523  for (i = 0; i < viv->n_sb_entries; i++) {
524  viv->sb_entries[i].size = ffio_read_varlen(pb);
525  viv->sb_entries[i].flag = avio_r8(pb);
526  }
527 
528  ffio_read_varlen(pb);
529  avio_r8(pb);
530 
531  viv->current_sb_entry = 0;
532 }
533 
535 {
536  VividasDemuxContext *viv = s->priv_data;
537  AVIOContext *pb = s->pb;
538  int64_t header_end;
539  int num_tracks;
540  uint32_t key, k2;
541  uint32_t v;
542  uint8_t keybuffer[187];
543  uint32_t b22_size = 0;
544  uint32_t b22_key = 0;
545  uint8_t *buf = 0;
546  int ret;
547 
548  avio_skip(pb, 9);
549 
550  header_end = avio_tell(pb);
551 
552  header_end += ffio_read_varlen(pb);
553 
554  num_tracks = avio_r8(pb);
555 
556  if (num_tracks != 1) {
557  av_log(s, AV_LOG_ERROR, "number of tracks %d is not 1\n", num_tracks);
558  return AVERROR(EINVAL);
559  }
560 
561  v = avio_r8(pb);
562  avio_seek(pb, v, SEEK_CUR);
563 
564  avio_read(pb, keybuffer, 187);
565  key = decode_key(keybuffer);
566  viv->sb_key = key;
567 
568  avio_rl32(pb);
569 
570  for (;;) {
571  int64_t here = avio_tell(pb);
572  int block_len, block_type;
573 
574  if (here >= header_end)
575  break;
576 
577  block_len = ffio_read_varlen(pb);
578  if (avio_feof(pb) || block_len <= 0)
579  return AVERROR_INVALIDDATA;
580 
581  block_type = avio_r8(pb);
582 
583  if (block_type == 22) {
584  avio_read(pb, keybuffer, 187);
585  b22_key = decode_key(keybuffer);
586  b22_size = avio_rl32(pb);
587  }
588 
589  avio_seek(pb, here + block_len, SEEK_SET);
590  }
591 
592  if (b22_size) {
593  k2 = b22_key;
594  buf = read_vblock(pb, &v, b22_key, &k2, 0);
595  if (!buf)
596  return AVERROR(EIO);
597 
598  av_free(buf);
599  }
600 
601  k2 = key;
602  buf = read_vblock(pb, &v, key, &k2, 0);
603  if (!buf)
604  return AVERROR(EIO);
605  ret = track_header(viv, s, buf, v);
606  av_free(buf);
607  if (ret < 0)
608  return ret;
609 
610  buf = read_vblock(pb, &v, key, &k2, v);
611  if (!buf)
612  return AVERROR(EIO);
613  ret = track_index(viv, s, buf, v);
614  av_free(buf);
615  if (ret < 0)
616  goto fail;
617 
618  viv->sb_offset = avio_tell(pb);
619  if (viv->n_sb_blocks > 0) {
620  viv->current_sb = 0;
621  load_sb_block(s, viv, viv->sb_blocks[0].size);
622  } else {
623  viv->current_sb = -1;
624  }
625 
626  return 0;
627 fail:
628  av_freep(&viv->sb_blocks);
629  return ret;
630 }
631 
633  AVPacket *pkt)
634 {
635  VividasDemuxContext *viv = s->priv_data;
636  AVIOContext *pb;
637  int64_t off;
638  int ret;
639 
640  if (!viv->sb_pb)
641  return AVERROR(EIO);
642  if (avio_feof(viv->sb_pb))
643  return AVERROR_EOF;
644 
646  AVStream *astream;
648 
649  pb = viv->sb_pb;
650  ret = av_get_packet(pb, pkt, size);
651  if (ret < 0)
652  return ret;
653  pkt->pos += viv->sb_offset + viv->sb_blocks[viv->current_sb].byte_offset;
654 
655  pkt->stream_index = 1;
656  astream = s->streams[pkt->stream_index];
657 
658  pkt->pts = av_rescale_q(viv->audio_sample, av_make_q(1, astream->codecpar->sample_rate), astream->time_base);
660  pkt->flags |= AV_PKT_FLAG_KEY;
662  return 0;
663  }
664 
665  if (viv->current_sb_entry >= viv->n_sb_entries) {
666  if (viv->current_sb+1 >= viv->n_sb_blocks)
667  return AVERROR(EIO);
668  viv->current_sb++;
669 
670  load_sb_block(s, viv, 0);
671  viv->current_sb_entry = 0;
672  }
673 
674  pb = viv->sb_pb;
675  if (!pb)
676  return AVERROR(EIO);
677  off = avio_tell(pb);
678 
679  if (viv->current_sb_entry >= viv->n_sb_entries)
680  return AVERROR_INVALIDDATA;
681 
682  off += viv->sb_entries[viv->current_sb_entry].size;
683 
684  if (viv->sb_entries[viv->current_sb_entry].flag == 0) {
685  uint64_t v_size = ffio_read_varlen(pb);
686  int last = 0, last_start;
687 
688  if (!viv->num_audio)
689  return AVERROR_INVALIDDATA;
690 
691  ffio_read_varlen(pb);
692  if (v_size > INT_MAX || !v_size)
693  return AVERROR_INVALIDDATA;
694  ret = av_get_packet(pb, pkt, v_size);
695  if (ret < 0)
696  return ret;
697  pkt->pos += viv->sb_offset + viv->sb_blocks[viv->current_sb].byte_offset;
698 
699  pkt->pts = viv->sb_blocks[viv->current_sb].packet_offset + viv->current_sb_entry;
700  pkt->flags |= (pkt->data[0]&0x80)?0:AV_PKT_FLAG_KEY;
701  pkt->stream_index = 0;
702 
703  for (int i = 0; i < MAX_AUDIO_SUBPACKETS - 1; i++) {
704  int start, pcm_bytes;
705  start = ffio_read_varlen(pb);
706  pcm_bytes = ffio_read_varlen(pb);
707 
708  if (i > 0 && start == 0)
709  break;
710  if (start < last)
711  return AVERROR_INVALIDDATA;
712 
713  viv->n_audio_subpackets = i + 1;
714  last =
715  viv->audio_subpackets[i].start = start;
716  viv->audio_subpackets[i].pcm_bytes = pcm_bytes;
717  }
718  last_start =
719  viv->audio_subpackets[viv->n_audio_subpackets].start = (int)(off - avio_tell(pb));
720  if (last_start < last)
721  return AVERROR_INVALIDDATA;
722  viv->current_audio_subpacket = 0;
723 
724  } else {
725  uint64_t v_size = ffio_read_varlen(pb);
726 
727  if (v_size > INT_MAX || !v_size)
728  return AVERROR_INVALIDDATA;
729  ret = av_get_packet(pb, pkt, v_size);
730  if (ret < 0)
731  return ret;
732  pkt->pos += viv->sb_offset + viv->sb_blocks[viv->current_sb].byte_offset;
733  pkt->pts = viv->sb_blocks[viv->current_sb].packet_offset + viv->current_sb_entry;
734  pkt->flags |= (pkt->data[0] & 0x80) ? 0 : AV_PKT_FLAG_KEY;
735  pkt->stream_index = 0;
736  }
737 
738  viv->current_sb_entry++;
739 
740  return 0;
741 }
742 
744 {
745  VividasDemuxContext *viv = s->priv_data;
746 
747  av_freep(&viv->sb_pb);
748  av_freep(&viv->sb_buf);
749  av_freep(&viv->sb_blocks);
750  av_freep(&viv->sb_entries);
751 
752  return 0;
753 }
754 
755 static int viv_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
756 {
757  VividasDemuxContext *viv = s->priv_data;
758  int64_t frame;
759 
760  if (stream_index == 0)
761  frame = timestamp;
762  else
763  frame = av_rescale_q(timestamp, s->streams[0]->time_base, s->streams[stream_index]->time_base);
764 
765  for (int i = 0; i < viv->n_sb_blocks; i++) {
766  if (frame >= viv->sb_blocks[i].packet_offset && frame < viv->sb_blocks[i].packet_offset + viv->sb_blocks[i].n_packets) {
767  // flush audio packet queue
768  viv->current_audio_subpacket = 0;
769  viv->n_audio_subpackets = 0;
770  viv->current_sb = i;
771  // seek to ith sb block
772  avio_seek(s->pb, viv->sb_offset + viv->sb_blocks[i].byte_offset, SEEK_SET);
773  // load the block
774  load_sb_block(s, viv, 0);
775  // most problematic part: guess audio offset
777  // hand-tuned 1.s a/v offset
778  viv->audio_sample += s->streams[1]->codecpar->sample_rate;
779  viv->current_sb_entry = 0;
780  return 1;
781  }
782  }
783  return 0;
784 }
785 
787  .name = "vividas",
788  .long_name = NULL_IF_CONFIG_SMALL("Vividas VIV"),
789  .priv_data_size = sizeof(VividasDemuxContext),
795 };
#define NULL
Definition: coverity.c:32
uint64_t ffio_read_varlen(AVIOContext *bc)
Definition: aviobuf.c:907
static uint8_t * read_vblock(AVIOContext *src, uint32_t *size, uint32_t key, uint32_t *k2, int align)
Definition: vividas.c:197
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:334
static uint32_t get_v(uint8_t *p, int len)
Definition: vividas.c:182
static void decode_block(uint8_t *src, uint8_t *dest, unsigned size, uint32_t key, uint32_t *key_ptr, int align)
Definition: vividas.c:142
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:375
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4948
int64_t packet_offset
Definition: vividas.c:42
#define avpriv_request_sample(...)
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:241
int n_audio_subpackets
Definition: vividas.c:67
static unsigned recover_key(unsigned char sample[4], unsigned expected_size)
Definition: vividas.c:114
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:329
int size
Definition: vividas.c:46
const char * key
static AVPacket pkt
#define sample
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:245
Format I/O context.
Definition: avformat.h:1351
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
Definition: vividas.c:45
uint8_t
#define av_malloc(s)
int width
Video only.
Definition: codec_par.h:126
float delta
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:92
int id
Format-specific stream ID.
Definition: avformat.h:883
VIV_SB_block * sb_blocks
Definition: vividas.c:55
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4526
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:262
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
static AVFrame * frame
int flag
Definition: vividas.c:46
uint8_t * data
Definition: packet.h:355
#define AVERROR_EOF
End of file.
Definition: error.h:55
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
uint32_t sb_key
Definition: vividas.c:58
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:307
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
#define av_log(a,...)
AVIOContext * sb_pb
Definition: vividas.c:63
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:625
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:388
static const uint8_t plaintext[8]
Definition: blowfish.c:112
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
#define src
Definition: vp8dsp.c:254
AVIOContext * avio_alloc_context(unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Allocate and initialize an AVIOContext for buffered I/O.
Definition: aviobuf.c:126
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static uint8_t * read_sb_block(AVIOContext *src, unsigned *size, uint32_t *key, unsigned expected_size)
Definition: vividas.c:232
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:747
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:188
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
static int viv_read_header(AVFormatContext *s)
Definition: vividas.c:534
simple assert() macros that are a bit more flexible than ISO C assert().
static const uint8_t offset[127][2]
Definition: vf_spp.c:93
#define fail()
Definition: checkasm.h:123
int64_t sb_offset
Definition: vividas.c:59
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:361
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:78
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:616
VIV_SB_entry * sb_entries
Definition: vividas.c:65
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
static int viv_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: vividas.c:755
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:3328
AVInputFormat ff_vividas_demuxer
Definition: vividas.c:786
static void xor_block(void *p1, void *p2, unsigned size, int key, unsigned *key_ptr)
Definition: vividas.c:123
#define a2
Definition: regdef.h:48
#define s(width, name)
Definition: cbs_vp9.c:257
#define AV_RL32
Definition: intreadwrite.h:146
#define MAX_AUDIO_SUBPACKETS
Definition: vividas.c:37
int current_audio_subpacket
Definition: vividas.c:68
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:545
Stream structure.
Definition: avformat.h:876
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
#define av_bswap32
Definition: bswap.h:33
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
static AVRational av_make_q(int num, int den)
Create an AVRational.
Definition: rational.h:71
long long int64_t
Definition: coverity.c:34
static uint32_t decode_key(uint8_t *buf)
Definition: vividas.c:90
int64_t audio_sample
Definition: vividas.c:70
unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
Encode extradata length to a buffer.
Definition: utils.c:1836
int n_packets
Definition: vividas.c:40
static int viv_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: vividas.c:632
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
#define flags(name, subs,...)
Definition: cbs_av1.c:576
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:159
int sample_rate
Audio only.
Definition: codec_par.h:170
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:731
Main libavformat public API header.
int
static void load_sb_block(AVFormatContext *s, VividasDemuxContext *viv, unsigned expected_size)
Definition: vividas.c:490
int ffio_init_context(AVIOContext *s, unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Definition: aviobuf.c:76
#define flag(name)
Definition: cbs_av1.c:568
static double c[64]
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:927
uint8_t * sb_buf
Definition: vividas.c:62
static int viv_read_close(AVFormatContext *s)
Definition: vividas.c:743
static int viv_probe(const AVProbeData *p)
Definition: vividas.c:75
#define av_free(p)
int len
void * priv_data
Format private data.
Definition: avformat.h:1379
static int track_header(VividasDemuxContext *viv, AVFormatContext *s, uint8_t *buf, int size)
Definition: vividas.c:280
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
int channels
Audio only.
Definition: codec_par.h:166
static const uint8_t keybits[32]
Definition: vividas.c:83
#define av_freep(p)
VIV_AudioSubpacket audio_subpackets[MAX_AUDIO_SUBPACKETS]
Definition: vividas.c:72
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:650
static int track_index(VividasDemuxContext *viv, AVFormatContext *s, uint8_t *buf, unsigned size)
Definition: vividas.c:434
int size
Definition: vividas.c:40
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1023
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:356
#define HAVE_BIGENDIAN
Definition: config.h:199
int stream_index
Definition: packet.h:357
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:905
This structure stores compressed data.
Definition: packet.h:332
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:348
static void put_v(uint8_t *p, unsigned v)
Definition: vividas.c:102
int64_t byte_offset
Definition: vividas.c:41
static uint8_t tmp[11]
Definition: aes_ctr.c:26