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rmdec.c
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1 /*
2  * "Real" compatible demuxer.
3  * Copyright (c) 2000, 2001 Fabrice Bellard
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/avassert.h"
23 #include "libavutil/avstring.h"
25 #include "libavutil/intreadwrite.h"
26 #include "libavutil/dict.h"
27 #include "avformat.h"
28 #include "internal.h"
29 #include "rmsipr.h"
30 #include "rm.h"
31 
32 #define DEINT_ID_GENR MKTAG('g', 'e', 'n', 'r') ///< interleaving for Cooker/Atrac
33 #define DEINT_ID_INT0 MKTAG('I', 'n', 't', '0') ///< no interleaving needed
34 #define DEINT_ID_INT4 MKTAG('I', 'n', 't', '4') ///< interleaving for 28.8
35 #define DEINT_ID_SIPR MKTAG('s', 'i', 'p', 'r') ///< interleaving for Sipro
36 #define DEINT_ID_VBRF MKTAG('v', 'b', 'r', 'f') ///< VBR case for AAC
37 #define DEINT_ID_VBRS MKTAG('v', 'b', 'r', 's') ///< VBR case for AAC
38 
39 struct RMStream {
40  AVPacket pkt; ///< place to store merged video frame / reordered audio data
41  int videobufsize; ///< current assembled frame size
42  int videobufpos; ///< position for the next slice in the video buffer
43  int curpic_num; ///< picture number of current frame
45  int64_t pktpos; ///< first slice position in file
46  /// Audio descrambling matrix parameters
47  int64_t audiotimestamp; ///< Audio packet timestamp
48  int sub_packet_cnt; // Subpacket counter, used while reading
49  int sub_packet_size, sub_packet_h, coded_framesize; ///< Descrambling parameters from container
50  int audio_framesize; /// Audio frame size from container
51  int sub_packet_lengths[16]; /// Length of each subpacket
52  int32_t deint_id; ///< deinterleaver used in audio stream
53 };
54 
55 typedef struct {
60  int audio_stream_num; ///< Stream number for audio packets
61  int audio_pkt_cnt; ///< Output packet counter
63 
64 static inline void get_strl(AVIOContext *pb, char *buf, int buf_size, int len)
65 {
66  int i;
67  char *q, r;
68 
69  q = buf;
70  for(i=0;i<len;i++) {
71  r = avio_r8(pb);
72  if (i < buf_size - 1)
73  *q++ = r;
74  }
75  if (buf_size > 0) *q = '\0';
76 }
77 
78 static void get_str8(AVIOContext *pb, char *buf, int buf_size)
79 {
80  get_strl(pb, buf, buf_size, avio_r8(pb));
81 }
82 
83 static int rm_read_extradata(AVIOContext *pb, AVCodecContext *avctx, unsigned size)
84 {
85  if (size >= 1<<24)
86  return -1;
88  if (!avctx->extradata)
89  return AVERROR(ENOMEM);
90  avctx->extradata_size = avio_read(pb, avctx->extradata, size);
91  memset(avctx->extradata + avctx->extradata_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
92  if (avctx->extradata_size != size)
93  return AVERROR(EIO);
94  return 0;
95 }
96 
97 static void rm_read_metadata(AVFormatContext *s, int wide)
98 {
99  char buf[1024];
100  int i;
101  for (i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) {
102  int len = wide ? avio_rb16(s->pb) : avio_r8(s->pb);
103  get_strl(s->pb, buf, sizeof(buf), len);
104  av_dict_set(&s->metadata, ff_rm_metadata[i], buf, 0);
105  }
106 }
107 
109 {
110  RMStream *rms = av_mallocz(sizeof(RMStream));
111  rms->curpic_num = -1;
112  return rms;
113 }
114 
116 {
117  av_free_packet(&rms->pkt);
118 }
119 
121  AVStream *st, RMStream *ast, int read_all)
122 {
123  char buf[256];
124  uint32_t version;
125  int ret;
126 
127  /* ra type header */
128  version = avio_rb16(pb); /* version */
129  if (version == 3) {
130  unsigned bytes_per_minute;
131  int header_size = avio_rb16(pb);
132  int64_t startpos = avio_tell(pb);
133  avio_skip(pb, 8);
134  bytes_per_minute = avio_rb16(pb);
135  avio_skip(pb, 4);
136  rm_read_metadata(s, 0);
137  if ((startpos + header_size) >= avio_tell(pb) + 2) {
138  // fourcc (should always be "lpcJ")
139  avio_r8(pb);
140  get_str8(pb, buf, sizeof(buf));
141  }
142  // Skip extra header crap (this should never happen)
143  if ((startpos + header_size) > avio_tell(pb))
144  avio_skip(pb, header_size + startpos - avio_tell(pb));
145  if (bytes_per_minute)
146  st->codec->bit_rate = 8LL * bytes_per_minute / 60;
147  st->codec->sample_rate = 8000;
148  st->codec->channels = 1;
152  ast->deint_id = DEINT_ID_INT0;
153  } else {
154  int flavor, sub_packet_h, coded_framesize, sub_packet_size;
155  int codecdata_length;
156  unsigned bytes_per_minute;
157  /* old version (4) */
158  avio_skip(pb, 2); /* unused */
159  avio_rb32(pb); /* .ra4 */
160  avio_rb32(pb); /* data size */
161  avio_rb16(pb); /* version2 */
162  avio_rb32(pb); /* header size */
163  flavor= avio_rb16(pb); /* add codec info / flavor */
164  ast->coded_framesize = coded_framesize = avio_rb32(pb); /* coded frame size */
165  avio_rb32(pb); /* ??? */
166  bytes_per_minute = avio_rb32(pb);
167  if (version == 4) {
168  if (bytes_per_minute)
169  st->codec->bit_rate = 8LL * bytes_per_minute / 60;
170  }
171  avio_rb32(pb); /* ??? */
172  ast->sub_packet_h = sub_packet_h = avio_rb16(pb); /* 1 */
173  st->codec->block_align= avio_rb16(pb); /* frame size */
174  ast->sub_packet_size = sub_packet_size = avio_rb16(pb); /* sub packet size */
175  avio_rb16(pb); /* ??? */
176  if (version == 5) {
177  avio_rb16(pb); avio_rb16(pb); avio_rb16(pb);
178  }
179  st->codec->sample_rate = avio_rb16(pb);
180  avio_rb32(pb);
181  st->codec->channels = avio_rb16(pb);
182  if (version == 5) {
183  ast->deint_id = avio_rl32(pb);
184  avio_read(pb, buf, 4);
185  buf[4] = 0;
186  } else {
187  get_str8(pb, buf, sizeof(buf)); /* desc */
188  ast->deint_id = AV_RL32(buf);
189  get_str8(pb, buf, sizeof(buf)); /* desc */
190  }
192  st->codec->codec_tag = AV_RL32(buf);
194  st->codec->codec_tag);
195 
196  switch (st->codec->codec_id) {
197  case AV_CODEC_ID_AC3:
199  break;
200  case AV_CODEC_ID_RA_288:
201  st->codec->extradata_size= 0;
202  ast->audio_framesize = st->codec->block_align;
203  st->codec->block_align = coded_framesize;
204  break;
205  case AV_CODEC_ID_COOK:
207  case AV_CODEC_ID_ATRAC3:
208  case AV_CODEC_ID_SIPR:
209  if (read_all) {
210  codecdata_length = 0;
211  } else {
212  avio_rb16(pb); avio_r8(pb);
213  if (version == 5)
214  avio_r8(pb);
215  codecdata_length = avio_rb32(pb);
216  if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
217  av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
218  return -1;
219  }
220  }
221 
222  ast->audio_framesize = st->codec->block_align;
223  if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
224  if (flavor > 3) {
225  av_log(s, AV_LOG_ERROR, "bad SIPR file flavor %d\n",
226  flavor);
227  return -1;
228  }
229  st->codec->block_align = ff_sipr_subpk_size[flavor];
230  } else {
231  if(sub_packet_size <= 0){
232  av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
233  return -1;
234  }
235  st->codec->block_align = ast->sub_packet_size;
236  }
237  if ((ret = rm_read_extradata(pb, st->codec, codecdata_length)) < 0)
238  return ret;
239 
240  break;
241  case AV_CODEC_ID_AAC:
242  avio_rb16(pb); avio_r8(pb);
243  if (version == 5)
244  avio_r8(pb);
245  codecdata_length = avio_rb32(pb);
246  if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
247  av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
248  return -1;
249  }
250  if (codecdata_length >= 1) {
251  avio_r8(pb);
252  if ((ret = rm_read_extradata(pb, st->codec, codecdata_length - 1)) < 0)
253  return ret;
254  }
255  break;
256  default:
257  av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
258  }
259  if (ast->deint_id == DEINT_ID_INT4 ||
260  ast->deint_id == DEINT_ID_GENR ||
261  ast->deint_id == DEINT_ID_SIPR) {
262  if (st->codec->block_align <= 0 ||
263  ast->audio_framesize * sub_packet_h > (unsigned)INT_MAX ||
264  ast->audio_framesize * sub_packet_h < st->codec->block_align)
265  return AVERROR_INVALIDDATA;
266  if (av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h) < 0)
267  return AVERROR(ENOMEM);
268  }
269  switch (ast->deint_id) {
270  case DEINT_ID_INT4:
271  if (ast->coded_framesize > ast->audio_framesize ||
272  sub_packet_h <= 1 ||
273  ast->coded_framesize * sub_packet_h > (2 + (sub_packet_h & 1)) * ast->audio_framesize)
274  return AVERROR_INVALIDDATA;
275  break;
276  case DEINT_ID_GENR:
277  if (ast->sub_packet_size <= 0 ||
278  ast->sub_packet_size > ast->audio_framesize)
279  return AVERROR_INVALIDDATA;
280  break;
281  case DEINT_ID_SIPR:
282  case DEINT_ID_INT0:
283  case DEINT_ID_VBRS:
284  case DEINT_ID_VBRF:
285  break;
286  default:
287  av_log(s, AV_LOG_ERROR, "Unknown interleaver %X\n", ast->deint_id);
288  return AVERROR_INVALIDDATA;
289  }
290 
291  if (read_all) {
292  avio_r8(pb);
293  avio_r8(pb);
294  avio_r8(pb);
295  rm_read_metadata(s, 0);
296  }
297  }
298  return 0;
299 }
300 
301 int
303  AVStream *st, RMStream *rst, int codec_data_size, const uint8_t *mime)
304 {
305  unsigned int v;
306  int size;
307  int64_t codec_pos;
308  int ret;
309 
310  avpriv_set_pts_info(st, 64, 1, 1000);
311  codec_pos = avio_tell(pb);
312  v = avio_rb32(pb);
313  if (v == MKTAG(0xfd, 'a', 'r', '.')) {
314  /* ra type header */
315  if (rm_read_audio_stream_info(s, pb, st, rst, 0))
316  return -1;
317  } else if (v == MKBETAG('L', 'S', 'D', ':')) {
318  avio_seek(pb, -4, SEEK_CUR);
319  if ((ret = rm_read_extradata(pb, st->codec, codec_data_size)) < 0)
320  return ret;
321 
323  st->codec->codec_tag = AV_RL32(st->codec->extradata);
325  st->codec->codec_tag);
326  } else if(mime && !strcmp(mime, "logical-fileinfo")){
327  int stream_count, rule_count, property_count, i;
328  ff_free_stream(s, st);
329  if (avio_rb16(pb) != 0) {
330  av_log(s, AV_LOG_WARNING, "Unsupported version\n");
331  goto skip;
332  }
333  stream_count = avio_rb16(pb);
334  avio_skip(pb, 6*stream_count);
335  rule_count = avio_rb16(pb);
336  avio_skip(pb, 2*rule_count);
337  property_count = avio_rb16(pb);
338  for(i=0; i<property_count; i++){
339  uint8_t name[128], val[128];
340  avio_rb32(pb);
341  if (avio_rb16(pb) != 0) {
342  av_log(s, AV_LOG_WARNING, "Unsupported Name value property version\n");
343  goto skip; //FIXME skip just this one
344  }
345  get_str8(pb, name, sizeof(name));
346  switch(avio_rb32(pb)) {
347  case 2: get_strl(pb, val, sizeof(val), avio_rb16(pb));
348  av_dict_set(&s->metadata, name, val, 0);
349  break;
350  default: avio_skip(pb, avio_rb16(pb));
351  }
352  }
353  } else {
354  int fps;
355  if (avio_rl32(pb) != MKTAG('V', 'I', 'D', 'O')) {
356  fail1:
357  av_log(s, AV_LOG_WARNING, "Unsupported stream type %08x\n", v);
358  goto skip;
359  }
360  st->codec->codec_tag = avio_rl32(pb);
362  st->codec->codec_tag);
363  av_dlog(s, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
364  if (st->codec->codec_id == AV_CODEC_ID_NONE)
365  goto fail1;
366  st->codec->width = avio_rb16(pb);
367  st->codec->height = avio_rb16(pb);
368  avio_skip(pb, 2); // looks like bits per sample
369  avio_skip(pb, 4); // always zero?
372  fps = avio_rb32(pb);
373 
374  if ((ret = rm_read_extradata(pb, st->codec, codec_data_size - (avio_tell(pb) - codec_pos))) < 0)
375  return ret;
376 
378  0x10000, fps, (1 << 30) - 1);
379 #if FF_API_R_FRAME_RATE
380  st->r_frame_rate = st->avg_frame_rate;
381 #endif
382  }
383 
384 skip:
385  /* skip codec info */
386  size = avio_tell(pb) - codec_pos;
387  avio_skip(pb, codec_data_size - size);
388 
389  return 0;
390 }
391 
392 /** this function assumes that the demuxer has already seeked to the start
393  * of the INDX chunk, and will bail out if not. */
395 {
396  AVIOContext *pb = s->pb;
397  unsigned int size, n_pkts, str_id, next_off, n, pos, pts;
398  AVStream *st;
399 
400  do {
401  if (avio_rl32(pb) != MKTAG('I','N','D','X'))
402  return -1;
403  size = avio_rb32(pb);
404  if (size < 20)
405  return -1;
406  avio_skip(pb, 2);
407  n_pkts = avio_rb32(pb);
408  str_id = avio_rb16(pb);
409  next_off = avio_rb32(pb);
410  for (n = 0; n < s->nb_streams; n++)
411  if (s->streams[n]->id == str_id) {
412  st = s->streams[n];
413  break;
414  }
415  if (n == s->nb_streams) {
416  av_log(s, AV_LOG_ERROR,
417  "Invalid stream index %d for index at pos %"PRId64"\n",
418  str_id, avio_tell(pb));
419  goto skip;
420  } else if ((avio_size(pb) - avio_tell(pb)) / 14 < n_pkts) {
421  av_log(s, AV_LOG_ERROR,
422  "Nr. of packets in packet index for stream index %d "
423  "exceeds filesize (%"PRId64" at %"PRId64" = %"PRId64")\n",
424  str_id, avio_size(pb), avio_tell(pb),
425  (avio_size(pb) - avio_tell(pb)) / 14);
426  goto skip;
427  }
428 
429  for (n = 0; n < n_pkts; n++) {
430  avio_skip(pb, 2);
431  pts = avio_rb32(pb);
432  pos = avio_rb32(pb);
433  avio_skip(pb, 4); /* packet no. */
434 
435  av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME);
436  }
437 
438 skip:
439  if (next_off && avio_tell(pb) < next_off &&
440  avio_seek(pb, next_off, SEEK_SET) < 0) {
441  av_log(s, AV_LOG_ERROR,
442  "Non-linear index detected, not supported\n");
443  return -1;
444  }
445  } while (next_off);
446 
447  return 0;
448 }
449 
451 {
452  RMDemuxContext *rm = s->priv_data;
453  AVStream *st;
454 
455  rm->old_format = 1;
456  st = avformat_new_stream(s, NULL);
457  if (!st)
458  return -1;
460  return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
461 }
462 
464 {
465  RMDemuxContext *rm = s->priv_data;
466  AVStream *st;
467  AVIOContext *pb = s->pb;
468  unsigned int tag;
469  int tag_size;
470  unsigned int start_time, duration;
471  unsigned int data_off = 0, indx_off = 0;
472  char buf[128], mime[128];
473  int flags = 0;
474 
475  tag = avio_rl32(pb);
476  if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
477  /* very old .ra format */
478  return rm_read_header_old(s);
479  } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
480  return AVERROR(EIO);
481  }
482 
483  tag_size = avio_rb32(pb);
484  avio_skip(pb, tag_size - 8);
485 
486  for(;;) {
487  if (url_feof(pb))
488  return -1;
489  tag = avio_rl32(pb);
490  tag_size = avio_rb32(pb);
491  avio_rb16(pb);
492  av_dlog(s, "tag=%c%c%c%c (%08x) size=%d\n",
493  (tag ) & 0xff,
494  (tag >> 8) & 0xff,
495  (tag >> 16) & 0xff,
496  (tag >> 24) & 0xff,
497  tag,
498  tag_size);
499  if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
500  return -1;
501  switch(tag) {
502  case MKTAG('P', 'R', 'O', 'P'):
503  /* file header */
504  avio_rb32(pb); /* max bit rate */
505  avio_rb32(pb); /* avg bit rate */
506  avio_rb32(pb); /* max packet size */
507  avio_rb32(pb); /* avg packet size */
508  avio_rb32(pb); /* nb packets */
509  duration = avio_rb32(pb); /* duration */
510  s->duration = av_rescale(duration, AV_TIME_BASE, 1000);
511  avio_rb32(pb); /* preroll */
512  indx_off = avio_rb32(pb); /* index offset */
513  data_off = avio_rb32(pb); /* data offset */
514  avio_rb16(pb); /* nb streams */
515  flags = avio_rb16(pb); /* flags */
516  break;
517  case MKTAG('C', 'O', 'N', 'T'):
518  rm_read_metadata(s, 1);
519  break;
520  case MKTAG('M', 'D', 'P', 'R'):
521  st = avformat_new_stream(s, NULL);
522  if (!st)
523  return AVERROR(ENOMEM);
524  st->id = avio_rb16(pb);
525  avio_rb32(pb); /* max bit rate */
526  st->codec->bit_rate = avio_rb32(pb); /* bit rate */
527  avio_rb32(pb); /* max packet size */
528  avio_rb32(pb); /* avg packet size */
529  start_time = avio_rb32(pb); /* start time */
530  avio_rb32(pb); /* preroll */
531  duration = avio_rb32(pb); /* duration */
532  st->start_time = start_time;
533  st->duration = duration;
534  if(duration>0)
536  get_str8(pb, buf, sizeof(buf)); /* desc */
537  get_str8(pb, mime, sizeof(mime)); /* mimetype */
540  if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
541  avio_rb32(pb), mime) < 0)
542  return -1;
543  break;
544  case MKTAG('D', 'A', 'T', 'A'):
545  goto header_end;
546  default:
547  /* unknown tag: skip it */
548  avio_skip(pb, tag_size - 10);
549  break;
550  }
551  }
552  header_end:
553  rm->nb_packets = avio_rb32(pb); /* number of packets */
554  if (!rm->nb_packets && (flags & 4))
555  rm->nb_packets = 3600 * 25;
556  avio_rb32(pb); /* next data header */
557 
558  if (!data_off)
559  data_off = avio_tell(pb) - 18;
560  if (indx_off && pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX) &&
561  avio_seek(pb, indx_off, SEEK_SET) >= 0) {
562  rm_read_index(s);
563  avio_seek(pb, data_off + 18, SEEK_SET);
564  }
565 
566  return 0;
567 }
568 
569 static int get_num(AVIOContext *pb, int *len)
570 {
571  int n, n1;
572 
573  n = avio_rb16(pb);
574  (*len)-=2;
575  n &= 0x7FFF;
576  if (n >= 0x4000) {
577  return n - 0x4000;
578  } else {
579  n1 = avio_rb16(pb);
580  (*len)-=2;
581  return (n << 16) | n1;
582  }
583 }
584 
585 /* multiple of 20 bytes for ra144 (ugly) */
586 #define RAW_PACKET_SIZE 1000
587 
588 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
589  RMDemuxContext *rm = s->priv_data;
590  AVIOContext *pb = s->pb;
591  AVStream *st;
592  uint32_t state=0xFFFFFFFF;
593 
594  while(!url_feof(pb)){
595  int len, num, i;
596  *pos= avio_tell(pb) - 3;
597  if(rm->remaining_len > 0){
598  num= rm->current_stream;
599  len= rm->remaining_len;
600  *timestamp = AV_NOPTS_VALUE;
601  *flags= 0;
602  }else{
603  state= (state<<8) + avio_r8(pb);
604 
605  if(state == MKBETAG('I', 'N', 'D', 'X')){
606  int n_pkts, expected_len;
607  len = avio_rb32(pb);
608  avio_skip(pb, 2);
609  n_pkts = avio_rb32(pb);
610  expected_len = 20 + n_pkts * 14;
611  if (len == 20)
612  /* some files don't add index entries to chunk size... */
613  len = expected_len;
614  else if (len != expected_len)
616  "Index size %d (%d pkts) is wrong, should be %d.\n",
617  len, n_pkts, expected_len);
618  len -= 14; // we already read part of the index header
619  if(len<0)
620  continue;
621  goto skip;
622  } else if (state == MKBETAG('D','A','T','A')) {
624  "DATA tag in middle of chunk, file may be broken.\n");
625  }
626 
627  if(state > (unsigned)0xFFFF || state <= 12)
628  continue;
629  len=state - 12;
630  state= 0xFFFFFFFF;
631 
632  num = avio_rb16(pb);
633  *timestamp = avio_rb32(pb);
634  avio_r8(pb); /* reserved */
635  *flags = avio_r8(pb); /* flags */
636  }
637  for(i=0;i<s->nb_streams;i++) {
638  st = s->streams[i];
639  if (num == st->id)
640  break;
641  }
642  if (i == s->nb_streams) {
643 skip:
644  /* skip packet if unknown number */
645  avio_skip(pb, len);
646  rm->remaining_len = 0;
647  continue;
648  }
649  *stream_index= i;
650 
651  return len;
652  }
653  return -1;
654 }
655 
657  RMDemuxContext *rm, RMStream *vst,
658  AVPacket *pkt, int len, int *pseq,
659  int64_t *timestamp)
660 {
661  int hdr;
662  int seq = 0, pic_num = 0, len2 = 0, pos = 0; //init to silcense compiler warning
663  int type;
664 
665  hdr = avio_r8(pb); len--;
666  type = hdr >> 6;
667 
668  if(type != 3){ // not frame as a part of packet
669  seq = avio_r8(pb); len--;
670  }
671  if(type != 1){ // not whole frame
672  len2 = get_num(pb, &len);
673  pos = get_num(pb, &len);
674  pic_num = avio_r8(pb); len--;
675  }
676  if(len<0)
677  return -1;
678  rm->remaining_len = len;
679  if(type&1){ // frame, not slice
680  if(type == 3){ // frame as a part of packet
681  len= len2;
682  *timestamp = pos;
683  }
684  if(rm->remaining_len < len)
685  return -1;
686  rm->remaining_len -= len;
687  if(av_new_packet(pkt, len + 9) < 0)
688  return AVERROR(EIO);
689  pkt->data[0] = 0;
690  AV_WL32(pkt->data + 1, 1);
691  AV_WL32(pkt->data + 5, 0);
692  avio_read(pb, pkt->data + 9, len);
693  return 0;
694  }
695  //now we have to deal with single slice
696 
697  *pseq = seq;
698  if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
699  vst->slices = ((hdr & 0x3F) << 1) + 1;
700  vst->videobufsize = len2 + 8*vst->slices + 1;
701  av_free_packet(&vst->pkt); //FIXME this should be output.
702  if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
703  return AVERROR(ENOMEM);
704  vst->videobufpos = 8*vst->slices + 1;
705  vst->cur_slice = 0;
706  vst->curpic_num = pic_num;
707  vst->pktpos = avio_tell(pb);
708  }
709  if(type == 2)
710  len = FFMIN(len, pos);
711 
712  if(++vst->cur_slice > vst->slices)
713  return 1;
714  AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
715  AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
716  if(vst->videobufpos + len > vst->videobufsize)
717  return 1;
718  if (avio_read(pb, vst->pkt.data + vst->videobufpos, len) != len)
719  return AVERROR(EIO);
720  vst->videobufpos += len;
721  rm->remaining_len-= len;
722 
723  if (type == 2 || vst->videobufpos == vst->videobufsize) {
724  vst->pkt.data[0] = vst->cur_slice-1;
725  *pkt= vst->pkt;
726  vst->pkt.data= NULL;
727  vst->pkt.size= 0;
728  if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin
729  memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
730  vst->videobufpos - 1 - 8*vst->slices);
731  pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices);
732  pkt->pts = AV_NOPTS_VALUE;
733  pkt->pos = vst->pktpos;
734  vst->slices = 0;
735  return 0;
736  }
737 
738  return 1;
739 }
740 
741 static inline void
743 {
744  uint8_t *ptr;
745  int j;
746 
747  if (st->codec->codec_id == AV_CODEC_ID_AC3) {
748  ptr = pkt->data;
749  for (j=0;j<pkt->size;j+=2) {
750  FFSWAP(int, ptr[0], ptr[1]);
751  ptr += 2;
752  }
753  }
754 }
755 
756 int
758  AVStream *st, RMStream *ast, int len, AVPacket *pkt,
759  int *seq, int flags, int64_t timestamp)
760 {
761  RMDemuxContext *rm = s->priv_data;
762 
763  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
764  rm->current_stream= st->id;
765  if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len, seq, &timestamp))
766  return -1; //got partial frame
767  } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
768  if ((ast->deint_id == DEINT_ID_GENR) ||
769  (ast->deint_id == DEINT_ID_INT4) ||
770  (ast->deint_id == DEINT_ID_SIPR)) {
771  int x;
772  int sps = ast->sub_packet_size;
773  int cfs = ast->coded_framesize;
774  int h = ast->sub_packet_h;
775  int y = ast->sub_packet_cnt;
776  int w = ast->audio_framesize;
777 
778  if (flags & 2)
779  y = ast->sub_packet_cnt = 0;
780  if (!y)
781  ast->audiotimestamp = timestamp;
782 
783  switch (ast->deint_id) {
784  case DEINT_ID_INT4:
785  for (x = 0; x < h/2; x++)
786  avio_read(pb, ast->pkt.data+x*2*w+y*cfs, cfs);
787  break;
788  case DEINT_ID_GENR:
789  for (x = 0; x < w/sps; x++)
790  avio_read(pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
791  break;
792  case DEINT_ID_SIPR:
793  avio_read(pb, ast->pkt.data + y * w, w);
794  break;
795  }
796 
797  if (++(ast->sub_packet_cnt) < h)
798  return -1;
799  if (ast->deint_id == DEINT_ID_SIPR)
800  ff_rm_reorder_sipr_data(ast->pkt.data, h, w);
801 
802  ast->sub_packet_cnt = 0;
803  rm->audio_stream_num = st->index;
804  rm->audio_pkt_cnt = h * w / st->codec->block_align;
805  } else if ((ast->deint_id == DEINT_ID_VBRF) ||
806  (ast->deint_id == DEINT_ID_VBRS)) {
807  int x;
808  rm->audio_stream_num = st->index;
809  ast->sub_packet_cnt = (avio_rb16(pb) & 0xf0) >> 4;
810  if (ast->sub_packet_cnt) {
811  for (x = 0; x < ast->sub_packet_cnt; x++)
812  ast->sub_packet_lengths[x] = avio_rb16(pb);
813  rm->audio_pkt_cnt = ast->sub_packet_cnt;
814  ast->audiotimestamp = timestamp;
815  } else
816  return -1;
817  } else {
818  av_get_packet(pb, pkt, len);
819  rm_ac3_swap_bytes(st, pkt);
820  }
821  } else
822  av_get_packet(pb, pkt, len);
823 
824  pkt->stream_index = st->index;
825 
826 #if 0
827  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
828  if(st->codec->codec_id == AV_CODEC_ID_RV20){
829  int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
830  av_log(s, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
831 
832  seq |= (timestamp&~0x3FFF);
833  if(seq - timestamp > 0x2000) seq -= 0x4000;
834  if(seq - timestamp < -0x2000) seq += 0x4000;
835  }
836  }
837 #endif
838 
839  pkt->pts = timestamp;
840  if (flags & 2)
841  pkt->flags |= AV_PKT_FLAG_KEY;
842 
843  return st->codec->codec_type == AVMEDIA_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
844 }
845 
846 int
848  AVStream *st, RMStream *ast, AVPacket *pkt)
849 {
850  RMDemuxContext *rm = s->priv_data;
851 
852  av_assert0 (rm->audio_pkt_cnt > 0);
853 
854  if (ast->deint_id == DEINT_ID_VBRF ||
855  ast->deint_id == DEINT_ID_VBRS)
857  else {
858  if(av_new_packet(pkt, st->codec->block_align) < 0)
859  return AVERROR(ENOMEM);
860  memcpy(pkt->data, ast->pkt.data + st->codec->block_align * //FIXME avoid this
861  (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
862  st->codec->block_align);
863  }
864  rm->audio_pkt_cnt--;
865  if ((pkt->pts = ast->audiotimestamp) != AV_NOPTS_VALUE) {
867  pkt->flags = AV_PKT_FLAG_KEY;
868  } else
869  pkt->flags = 0;
870  pkt->stream_index = st->index;
871 
872  return rm->audio_pkt_cnt;
873 }
874 
876 {
877  RMDemuxContext *rm = s->priv_data;
878  AVStream *st = NULL; // init to silence compiler warning
879  int i, len, res, seq = 1;
880  int64_t timestamp, pos;
881  int flags;
882 
883  for (;;) {
884  if (rm->audio_pkt_cnt) {
885  // If there are queued audio packet return them first
886  st = s->streams[rm->audio_stream_num];
887  res = ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
888  if(res < 0)
889  return res;
890  flags = 0;
891  } else {
892  if (rm->old_format) {
893  RMStream *ast;
894 
895  st = s->streams[0];
896  ast = st->priv_data;
897  timestamp = AV_NOPTS_VALUE;
898  len = !ast->audio_framesize ? RAW_PACKET_SIZE :
899  ast->coded_framesize * ast->sub_packet_h / 2;
900  flags = (seq++ == 1) ? 2 : 0;
901  pos = avio_tell(s->pb);
902  } else {
903  len=sync(s, &timestamp, &flags, &i, &pos);
904  if (len > 0)
905  st = s->streams[i];
906  }
907 
908  if(len<0 || url_feof(s->pb))
909  return AVERROR(EIO);
910 
911  res = ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
912  &seq, flags, timestamp);
913  if((flags&2) && (seq&0x7F) == 1)
914  av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
915  if (res)
916  continue;
917  }
918 
919  if( (st->discard >= AVDISCARD_NONKEY && !(flags&2))
920  || st->discard >= AVDISCARD_ALL){
921  av_free_packet(pkt);
922  } else
923  break;
924  }
925 
926  return 0;
927 }
928 
930 {
931  int i;
932 
933  for (i=0;i<s->nb_streams;i++)
935 
936  return 0;
937 }
938 
939 static int rm_probe(AVProbeData *p)
940 {
941  /* check file header */
942  if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
943  p->buf[2] == 'M' && p->buf[3] == 'F' &&
944  p->buf[4] == 0 && p->buf[5] == 0) ||
945  (p->buf[0] == '.' && p->buf[1] == 'r' &&
946  p->buf[2] == 'a' && p->buf[3] == 0xfd))
947  return AVPROBE_SCORE_MAX;
948  else
949  return 0;
950 }
951 
952 static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
953  int64_t *ppos, int64_t pos_limit)
954 {
955  RMDemuxContext *rm = s->priv_data;
956  int64_t pos, dts;
957  int stream_index2, flags, len, h;
958 
959  pos = *ppos;
960 
961  if(rm->old_format)
962  return AV_NOPTS_VALUE;
963 
964  if (avio_seek(s->pb, pos, SEEK_SET) < 0)
965  return AV_NOPTS_VALUE;
966 
967  rm->remaining_len=0;
968  for(;;){
969  int seq=1;
970  AVStream *st;
971 
972  len=sync(s, &dts, &flags, &stream_index2, &pos);
973  if(len<0)
974  return AV_NOPTS_VALUE;
975 
976  st = s->streams[stream_index2];
977  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
978  h= avio_r8(s->pb); len--;
979  if(!(h & 0x40)){
980  seq = avio_r8(s->pb); len--;
981  }
982  }
983 
984  if((flags&2) && (seq&0x7F) == 1){
985  av_dlog(s, "%d %d-%d %"PRId64" %d\n",
986  flags, stream_index2, stream_index, dts, seq);
987  av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
988  if(stream_index2 == stream_index)
989  break;
990  }
991 
992  avio_skip(s->pb, len);
993  }
994  *ppos = pos;
995  return dts;
996 }
997 
998 static int rm_read_seek(AVFormatContext *s, int stream_index,
999  int64_t pts, int flags)
1000 {
1001  RMDemuxContext *rm = s->priv_data;
1002 
1003  if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1004  return -1;
1005  rm->audio_pkt_cnt = 0;
1006  return 0;
1007 }
1008 
1009 
1011  .name = "rm",
1012  .long_name = NULL_IF_CONFIG_SMALL("RealMedia"),
1013  .priv_data_size = sizeof(RMDemuxContext),
1014  .read_probe = rm_probe,
1018  .read_timestamp = rm_read_dts,
1020 };
1021 
1023  .name = "rdt",
1024  .long_name = NULL_IF_CONFIG_SMALL("RDT demuxer"),
1025  .priv_data_size = sizeof(RMDemuxContext),
1027  .flags = AVFMT_NOFILE,
1028 };