FFmpeg  1.2.12
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"
24 #include "libavutil/channel_layout.h"
25 #include "libavutil/intreadwrite.h"
26 #include "libavutil/dict.h"
27 #include "avformat.h"
28 #include "avio_internal.h"
29 #include "internal.h"
30 #include "rmsipr.h"
31 #include "rm.h"
32 
33 #define DEINT_ID_GENR MKTAG('g', 'e', 'n', 'r')
34 #define DEINT_ID_INT0 MKTAG('I', 'n', 't', '0')
35 #define DEINT_ID_INT4 MKTAG('I', 'n', 't', '4')
36 #define DEINT_ID_SIPR MKTAG('s', 'i', 'p', 'r')
37 #define DEINT_ID_VBRF MKTAG('v', 'b', 'r', 'f')
38 #define DEINT_ID_VBRS MKTAG('v', 'b', 'r', 's')
39 
40 struct RMStream {
44  int curpic_num;
46  int64_t pktpos;
47 
48  int64_t audiotimestamp;
49  int sub_packet_cnt; // Subpacket counter, used while reading
54 };
55 
56 typedef struct {
64 
65 static inline void get_strl(AVIOContext *pb, char *buf, int buf_size, int len)
66 {
67  int i;
68  char *q, r;
69 
70  q = buf;
71  for(i=0;i<len;i++) {
72  r = avio_r8(pb);
73  if (i < buf_size - 1)
74  *q++ = r;
75  }
76  if (buf_size > 0) *q = '\0';
77 }
78 
79 static void get_str8(AVIOContext *pb, char *buf, int buf_size)
80 {
81  get_strl(pb, buf, buf_size, avio_r8(pb));
82 }
83 
84 static int rm_read_extradata(AVIOContext *pb, AVCodecContext *avctx, unsigned size)
85 {
86  if (size >= 1<<24)
87  return -1;
89  if (!avctx->extradata)
90  return AVERROR(ENOMEM);
91  avctx->extradata_size = avio_read(pb, avctx->extradata, size);
92  memset(avctx->extradata + avctx->extradata_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
93  if (avctx->extradata_size != size)
94  return AVERROR(EIO);
95  return 0;
96 }
97 
98 static void rm_read_metadata(AVFormatContext *s, AVIOContext *pb, int wide)
99 {
100  char buf[1024];
101  int i;
102 
103  for (i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) {
104  int len = wide ? avio_rb16(pb) : avio_r8(pb);
105  get_strl(pb, buf, sizeof(buf), len);
106  av_dict_set(&s->metadata, ff_rm_metadata[i], buf, 0);
107  }
108 }
109 
111 {
112  RMStream *rms = av_mallocz(sizeof(RMStream));
113  rms->curpic_num = -1;
114  return rms;
115 }
116 
118 {
119  av_free_packet(&rms->pkt);
120 }
121 
123  AVStream *st, RMStream *ast, int read_all)
124 {
125  char buf[256];
126  uint32_t version;
127  int ret;
128 
129  /* ra type header */
130  version = avio_rb16(pb); /* version */
131  if (version == 3) {
132  unsigned bytes_per_minute;
133  int header_size = avio_rb16(pb);
134  int64_t startpos = avio_tell(pb);
135  avio_skip(pb, 8);
136  bytes_per_minute = avio_rb16(pb);
137  avio_skip(pb, 4);
138  rm_read_metadata(s, pb, 0);
139  if ((startpos + header_size) >= avio_tell(pb) + 2) {
140  // fourcc (should always be "lpcJ")
141  avio_r8(pb);
142  get_str8(pb, buf, sizeof(buf));
143  }
144  // Skip extra header crap (this should never happen)
145  if ((startpos + header_size) > avio_tell(pb))
146  avio_skip(pb, header_size + startpos - avio_tell(pb));
147  if (bytes_per_minute)
148  st->codec->bit_rate = 8LL * bytes_per_minute / 60;
149  st->codec->sample_rate = 8000;
150  st->codec->channels = 1;
154  ast->deint_id = DEINT_ID_INT0;
155  } else {
156  int flavor, sub_packet_h, coded_framesize, sub_packet_size;
157  int codecdata_length;
158  unsigned bytes_per_minute;
159  /* old version (4) */
160  avio_skip(pb, 2); /* unused */
161  avio_rb32(pb); /* .ra4 */
162  avio_rb32(pb); /* data size */
163  avio_rb16(pb); /* version2 */
164  avio_rb32(pb); /* header size */
165  flavor= avio_rb16(pb); /* add codec info / flavor */
166  ast->coded_framesize = coded_framesize = avio_rb32(pb); /* coded frame size */
167  avio_rb32(pb); /* ??? */
168  bytes_per_minute = avio_rb32(pb);
169  if (version == 4) {
170  if (bytes_per_minute)
171  st->codec->bit_rate = 8LL * bytes_per_minute / 60;
172  }
173  avio_rb32(pb); /* ??? */
174  ast->sub_packet_h = sub_packet_h = avio_rb16(pb); /* 1 */
175  st->codec->block_align= avio_rb16(pb); /* frame size */
176  ast->sub_packet_size = sub_packet_size = avio_rb16(pb); /* sub packet size */
177  avio_rb16(pb); /* ??? */
178  if (version == 5) {
179  avio_rb16(pb); avio_rb16(pb); avio_rb16(pb);
180  }
181  st->codec->sample_rate = avio_rb16(pb);
182  avio_rb32(pb);
183  st->codec->channels = avio_rb16(pb);
184  if (version == 5) {
185  ast->deint_id = avio_rl32(pb);
186  avio_read(pb, buf, 4);
187  buf[4] = 0;
188  } else {
189  get_str8(pb, buf, sizeof(buf)); /* desc */
190  ast->deint_id = AV_RL32(buf);
191  get_str8(pb, buf, sizeof(buf)); /* desc */
192  }
194  st->codec->codec_tag = AV_RL32(buf);
196  st->codec->codec_tag);
197 
198  switch (st->codec->codec_id) {
199  case AV_CODEC_ID_AC3:
201  break;
202  case AV_CODEC_ID_RA_288:
203  st->codec->extradata_size= 0;
204  ast->audio_framesize = st->codec->block_align;
205  st->codec->block_align = coded_framesize;
206  break;
207  case AV_CODEC_ID_COOK:
209  case AV_CODEC_ID_ATRAC3:
210  case AV_CODEC_ID_SIPR:
211  if (read_all) {
212  codecdata_length = 0;
213  } else {
214  avio_rb16(pb); avio_r8(pb);
215  if (version == 5)
216  avio_r8(pb);
217  codecdata_length = avio_rb32(pb);
218  if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
219  av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
220  return -1;
221  }
222  }
223 
224  ast->audio_framesize = st->codec->block_align;
225  if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
226  if (flavor > 3) {
227  av_log(s, AV_LOG_ERROR, "bad SIPR file flavor %d\n",
228  flavor);
229  return -1;
230  }
231  st->codec->block_align = ff_sipr_subpk_size[flavor];
232  } else {
233  if(sub_packet_size <= 0){
234  av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
235  return -1;
236  }
237  st->codec->block_align = ast->sub_packet_size;
238  }
239  if ((ret = rm_read_extradata(pb, st->codec, codecdata_length)) < 0)
240  return ret;
241 
242  break;
243  case AV_CODEC_ID_AAC:
244  avio_rb16(pb); avio_r8(pb);
245  if (version == 5)
246  avio_r8(pb);
247  codecdata_length = avio_rb32(pb);
248  if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
249  av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
250  return -1;
251  }
252  if (codecdata_length >= 1) {
253  avio_r8(pb);
254  if ((ret = rm_read_extradata(pb, st->codec, codecdata_length - 1)) < 0)
255  return ret;
256  }
257  break;
258  default:
259  av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
260  }
261  if (ast->deint_id == DEINT_ID_INT4 ||
262  ast->deint_id == DEINT_ID_GENR ||
263  ast->deint_id == DEINT_ID_SIPR) {
264  if (st->codec->block_align <= 0 ||
265  ast->audio_framesize * sub_packet_h > (unsigned)INT_MAX ||
266  ast->audio_framesize * sub_packet_h < st->codec->block_align)
267  return AVERROR_INVALIDDATA;
268  if (av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h) < 0)
269  return AVERROR(ENOMEM);
270  }
271  switch (ast->deint_id) {
272  case DEINT_ID_INT4:
273  if (ast->coded_framesize > ast->audio_framesize ||
274  sub_packet_h <= 1 ||
275  ast->coded_framesize * sub_packet_h > (2 + (sub_packet_h & 1)) * ast->audio_framesize)
276  return AVERROR_INVALIDDATA;
277  break;
278  case DEINT_ID_GENR:
279  if (ast->sub_packet_size <= 0 ||
280  ast->sub_packet_size > ast->audio_framesize)
281  return AVERROR_INVALIDDATA;
282  break;
283  case DEINT_ID_SIPR:
284  case DEINT_ID_INT0:
285  case DEINT_ID_VBRS:
286  case DEINT_ID_VBRF:
287  break;
288  default:
289  av_log(s, AV_LOG_ERROR, "Unknown interleaver %X\n", ast->deint_id);
290  return AVERROR_INVALIDDATA;
291  }
292 
293  if (read_all) {
294  avio_r8(pb);
295  avio_r8(pb);
296  avio_r8(pb);
297  rm_read_metadata(s, pb, 0);
298  }
299  }
300  return 0;
301 }
302 
303 int
305  AVStream *st, RMStream *rst, int codec_data_size, const uint8_t *mime)
306 {
307  unsigned int v;
308  int size;
309  int64_t codec_pos;
310  int ret;
311 
312  if (codec_data_size < 0)
313  return AVERROR_INVALIDDATA;
314 
315  avpriv_set_pts_info(st, 64, 1, 1000);
316  codec_pos = avio_tell(pb);
317  v = avio_rb32(pb);
318  if (v == MKTAG(0xfd, 'a', 'r', '.')) {
319  /* ra type header */
320  if (rm_read_audio_stream_info(s, pb, st, rst, 0))
321  return -1;
322  } else if (v == MKBETAG('L', 'S', 'D', ':')) {
323  avio_seek(pb, -4, SEEK_CUR);
324  if ((ret = rm_read_extradata(pb, st->codec, codec_data_size)) < 0)
325  return ret;
326 
328  st->codec->codec_tag = AV_RL32(st->codec->extradata);
330  st->codec->codec_tag);
331  } else if(mime && !strcmp(mime, "logical-fileinfo")){
332  int stream_count, rule_count, property_count, i;
333  ff_free_stream(s, st);
334  if (avio_rb16(pb) != 0) {
335  av_log(s, AV_LOG_WARNING, "Unsupported version\n");
336  goto skip;
337  }
338  stream_count = avio_rb16(pb);
339  avio_skip(pb, 6*stream_count);
340  rule_count = avio_rb16(pb);
341  avio_skip(pb, 2*rule_count);
342  property_count = avio_rb16(pb);
343  for(i=0; i<property_count; i++){
344  uint8_t name[128], val[128];
345  avio_rb32(pb);
346  if (avio_rb16(pb) != 0) {
347  av_log(s, AV_LOG_WARNING, "Unsupported Name value property version\n");
348  goto skip; //FIXME skip just this one
349  }
350  get_str8(pb, name, sizeof(name));
351  switch(avio_rb32(pb)) {
352  case 2: get_strl(pb, val, sizeof(val), avio_rb16(pb));
353  av_dict_set(&s->metadata, name, val, 0);
354  break;
355  default: avio_skip(pb, avio_rb16(pb));
356  }
357  }
358  } else {
359  int fps;
360  if (avio_rl32(pb) != MKTAG('V', 'I', 'D', 'O')) {
361  fail1:
362  av_log(s, AV_LOG_WARNING, "Unsupported stream type %08x\n", v);
363  goto skip;
364  }
365  st->codec->codec_tag = avio_rl32(pb);
367  st->codec->codec_tag);
368  av_dlog(s, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
369  if (st->codec->codec_id == AV_CODEC_ID_NONE)
370  goto fail1;
371  st->codec->width = avio_rb16(pb);
372  st->codec->height = avio_rb16(pb);
373  avio_skip(pb, 2); // looks like bits per sample
374  avio_skip(pb, 4); // always zero?
377  fps = avio_rb32(pb);
378 
379  if ((ret = rm_read_extradata(pb, st->codec, codec_data_size - (avio_tell(pb) - codec_pos))) < 0)
380  return ret;
381 
383  0x10000, fps, (1 << 30) - 1);
384 #if FF_API_R_FRAME_RATE
385  st->r_frame_rate = st->avg_frame_rate;
386 #endif
387  }
388 
389 skip:
390  /* skip codec info */
391  size = avio_tell(pb) - codec_pos;
392  if (codec_data_size >= size) {
393  avio_skip(pb, codec_data_size - size);
394  } else {
395  av_log(s, AV_LOG_WARNING, "codec_data_size %u < size %d\n", codec_data_size, size);
396  }
397 
398  return 0;
399 }
400 
404 {
405  AVIOContext *pb = s->pb;
406  unsigned int size, n_pkts, str_id, next_off, n, pos, pts;
407  AVStream *st;
408 
409  do {
410  if (avio_rl32(pb) != MKTAG('I','N','D','X'))
411  return -1;
412  size = avio_rb32(pb);
413  if (size < 20)
414  return -1;
415  avio_skip(pb, 2);
416  n_pkts = avio_rb32(pb);
417  str_id = avio_rb16(pb);
418  next_off = avio_rb32(pb);
419  for (n = 0; n < s->nb_streams; n++)
420  if (s->streams[n]->id == str_id) {
421  st = s->streams[n];
422  break;
423  }
424  if (n == s->nb_streams) {
425  av_log(s, AV_LOG_ERROR,
426  "Invalid stream index %d for index at pos %"PRId64"\n",
427  str_id, avio_tell(pb));
428  goto skip;
429  } else if ((avio_size(pb) - avio_tell(pb)) / 14 < n_pkts) {
430  av_log(s, AV_LOG_ERROR,
431  "Nr. of packets in packet index for stream index %d "
432  "exceeds filesize (%"PRId64" at %"PRId64" = %"PRId64")\n",
433  str_id, avio_size(pb), avio_tell(pb),
434  (avio_size(pb) - avio_tell(pb)) / 14);
435  goto skip;
436  }
437 
438  for (n = 0; n < n_pkts; n++) {
439  avio_skip(pb, 2);
440  pts = avio_rb32(pb);
441  pos = avio_rb32(pb);
442  avio_skip(pb, 4); /* packet no. */
443 
444  av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME);
445  }
446 
447 skip:
448  if (next_off && avio_tell(pb) < next_off &&
449  avio_seek(pb, next_off, SEEK_SET) < 0) {
450  av_log(s, AV_LOG_ERROR,
451  "Non-linear index detected, not supported\n");
452  return -1;
453  }
454  } while (next_off);
455 
456  return 0;
457 }
458 
460 {
461  RMDemuxContext *rm = s->priv_data;
462  AVStream *st;
463 
464  rm->old_format = 1;
465  st = avformat_new_stream(s, NULL);
466  if (!st)
467  return -1;
469  return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
470 }
471 
473 {
474  RMDemuxContext *rm = s->priv_data;
475  AVStream *st;
476  AVIOContext *pb = s->pb;
477  unsigned int tag;
478  int tag_size;
479  unsigned int start_time, duration;
480  unsigned int data_off = 0, indx_off = 0;
481  char buf[128], mime[128];
482  int flags = 0;
483 
484  tag = avio_rl32(pb);
485  if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
486  /* very old .ra format */
487  return rm_read_header_old(s);
488  } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
489  return AVERROR(EIO);
490  }
491 
492  tag_size = avio_rb32(pb);
493  avio_skip(pb, tag_size - 8);
494 
495  for(;;) {
496  if (url_feof(pb))
497  return -1;
498  tag = avio_rl32(pb);
499  tag_size = avio_rb32(pb);
500  avio_rb16(pb);
501  av_dlog(s, "tag=%c%c%c%c (%08x) size=%d\n",
502  (tag ) & 0xff,
503  (tag >> 8) & 0xff,
504  (tag >> 16) & 0xff,
505  (tag >> 24) & 0xff,
506  tag,
507  tag_size);
508  if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
509  return -1;
510  switch(tag) {
511  case MKTAG('P', 'R', 'O', 'P'):
512  /* file header */
513  avio_rb32(pb); /* max bit rate */
514  avio_rb32(pb); /* avg bit rate */
515  avio_rb32(pb); /* max packet size */
516  avio_rb32(pb); /* avg packet size */
517  avio_rb32(pb); /* nb packets */
518  duration = avio_rb32(pb); /* duration */
519  s->duration = av_rescale(duration, AV_TIME_BASE, 1000);
520  avio_rb32(pb); /* preroll */
521  indx_off = avio_rb32(pb); /* index offset */
522  data_off = avio_rb32(pb); /* data offset */
523  avio_rb16(pb); /* nb streams */
524  flags = avio_rb16(pb); /* flags */
525  break;
526  case MKTAG('C', 'O', 'N', 'T'):
527  rm_read_metadata(s, pb, 1);
528  break;
529  case MKTAG('M', 'D', 'P', 'R'):
530  st = avformat_new_stream(s, NULL);
531  if (!st)
532  return AVERROR(ENOMEM);
533  st->id = avio_rb16(pb);
534  avio_rb32(pb); /* max bit rate */
535  st->codec->bit_rate = avio_rb32(pb); /* bit rate */
536  avio_rb32(pb); /* max packet size */
537  avio_rb32(pb); /* avg packet size */
538  start_time = avio_rb32(pb); /* start time */
539  avio_rb32(pb); /* preroll */
540  duration = avio_rb32(pb); /* duration */
541  st->start_time = start_time;
542  st->duration = duration;
543  if(duration>0)
545  get_str8(pb, buf, sizeof(buf)); /* desc */
546  get_str8(pb, mime, sizeof(mime)); /* mimetype */
549  if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
550  avio_rb32(pb), mime) < 0)
551  return -1;
552  break;
553  case MKTAG('D', 'A', 'T', 'A'):
554  goto header_end;
555  default:
556  /* unknown tag: skip it */
557  avio_skip(pb, tag_size - 10);
558  break;
559  }
560  }
561  header_end:
562  rm->nb_packets = avio_rb32(pb); /* number of packets */
563  if (!rm->nb_packets && (flags & 4))
564  rm->nb_packets = 3600 * 25;
565  avio_rb32(pb); /* next data header */
566 
567  if (!data_off)
568  data_off = avio_tell(pb) - 18;
569  if (indx_off && pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX) &&
570  avio_seek(pb, indx_off, SEEK_SET) >= 0) {
571  rm_read_index(s);
572  avio_seek(pb, data_off + 18, SEEK_SET);
573  }
574 
575  return 0;
576 }
577 
578 static int get_num(AVIOContext *pb, int *len)
579 {
580  int n, n1;
581 
582  n = avio_rb16(pb);
583  (*len)-=2;
584  n &= 0x7FFF;
585  if (n >= 0x4000) {
586  return n - 0x4000;
587  } else {
588  n1 = avio_rb16(pb);
589  (*len)-=2;
590  return (n << 16) | n1;
591  }
592 }
593 
594 /* multiple of 20 bytes for ra144 (ugly) */
595 #define RAW_PACKET_SIZE 1000
596 
597 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
598  RMDemuxContext *rm = s->priv_data;
599  AVIOContext *pb = s->pb;
600  AVStream *st;
601  uint32_t state=0xFFFFFFFF;
602 
603  while(!url_feof(pb)){
604  int len, num, i;
605  *pos= avio_tell(pb) - 3;
606  if(rm->remaining_len > 0){
607  num= rm->current_stream;
608  len= rm->remaining_len;
609  *timestamp = AV_NOPTS_VALUE;
610  *flags= 0;
611  }else{
612  state= (state<<8) + avio_r8(pb);
613 
614  if(state == MKBETAG('I', 'N', 'D', 'X')){
615  int n_pkts, expected_len;
616  len = avio_rb32(pb);
617  avio_skip(pb, 2);
618  n_pkts = avio_rb32(pb);
619  expected_len = 20 + n_pkts * 14;
620  if (len == 20)
621  /* some files don't add index entries to chunk size... */
622  len = expected_len;
623  else if (len != expected_len)
625  "Index size %d (%d pkts) is wrong, should be %d.\n",
626  len, n_pkts, expected_len);
627  len -= 14; // we already read part of the index header
628  if(len<0)
629  continue;
630  goto skip;
631  } else if (state == MKBETAG('D','A','T','A')) {
633  "DATA tag in middle of chunk, file may be broken.\n");
634  }
635 
636  if(state > (unsigned)0xFFFF || state <= 12)
637  continue;
638  len=state - 12;
639  state= 0xFFFFFFFF;
640 
641  num = avio_rb16(pb);
642  *timestamp = avio_rb32(pb);
643  avio_r8(pb); /* reserved */
644  *flags = avio_r8(pb); /* flags */
645  }
646  for(i=0;i<s->nb_streams;i++) {
647  st = s->streams[i];
648  if (num == st->id)
649  break;
650  }
651  if (i == s->nb_streams) {
652 skip:
653  /* skip packet if unknown number */
654  avio_skip(pb, len);
655  rm->remaining_len = 0;
656  continue;
657  }
658  *stream_index= i;
659 
660  return len;
661  }
662  return -1;
663 }
664 
666  RMDemuxContext *rm, RMStream *vst,
667  AVPacket *pkt, int len, int *pseq,
668  int64_t *timestamp)
669 {
670  int hdr;
671  int seq = 0, pic_num = 0, len2 = 0, pos = 0; //init to silcense compiler warning
672  int type;
673 
674  hdr = avio_r8(pb); len--;
675  type = hdr >> 6;
676 
677  if(type != 3){ // not frame as a part of packet
678  seq = avio_r8(pb); len--;
679  }
680  if(type != 1){ // not whole frame
681  len2 = get_num(pb, &len);
682  pos = get_num(pb, &len);
683  pic_num = avio_r8(pb); len--;
684  }
685  if(len<0)
686  return -1;
687  rm->remaining_len = len;
688  if(type&1){ // frame, not slice
689  if(type == 3){ // frame as a part of packet
690  len= len2;
691  *timestamp = pos;
692  }
693  if(rm->remaining_len < len)
694  return -1;
695  rm->remaining_len -= len;
696  if(av_new_packet(pkt, len + 9) < 0)
697  return AVERROR(EIO);
698  pkt->data[0] = 0;
699  AV_WL32(pkt->data + 1, 1);
700  AV_WL32(pkt->data + 5, 0);
701  avio_read(pb, pkt->data + 9, len);
702  return 0;
703  }
704  //now we have to deal with single slice
705 
706  *pseq = seq;
707  if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
708  if (len2 > ffio_limit(pb, len2)) {
709  av_log(s, AV_LOG_ERROR, "Impossibly sized packet\n");
710  return AVERROR_INVALIDDATA;
711  }
712  vst->slices = ((hdr & 0x3F) << 1) + 1;
713  vst->videobufsize = len2 + 8*vst->slices + 1;
714  av_free_packet(&vst->pkt); //FIXME this should be output.
715  if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
716  return AVERROR(ENOMEM);
717  vst->videobufpos = 8*vst->slices + 1;
718  vst->cur_slice = 0;
719  vst->curpic_num = pic_num;
720  vst->pktpos = avio_tell(pb);
721  }
722  if(type == 2)
723  len = FFMIN(len, pos);
724 
725  if(++vst->cur_slice > vst->slices)
726  return 1;
727  AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
728  AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
729  if(vst->videobufpos + len > vst->videobufsize)
730  return 1;
731  if (avio_read(pb, vst->pkt.data + vst->videobufpos, len) != len)
732  return AVERROR(EIO);
733  vst->videobufpos += len;
734  rm->remaining_len-= len;
735 
736  if (type == 2 || vst->videobufpos == vst->videobufsize) {
737  vst->pkt.data[0] = vst->cur_slice-1;
738  *pkt= vst->pkt;
739  vst->pkt.data= NULL;
740  vst->pkt.size= 0;
741  if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin
742  memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
743  vst->videobufpos - 1 - 8*vst->slices);
744  pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices);
745  pkt->pts = AV_NOPTS_VALUE;
746  pkt->pos = vst->pktpos;
747  vst->slices = 0;
748  return 0;
749  }
750 
751  return 1;
752 }
753 
754 static inline void
756 {
757  uint8_t *ptr;
758  int j;
759 
760  if (st->codec->codec_id == AV_CODEC_ID_AC3) {
761  ptr = pkt->data;
762  for (j=0;j<pkt->size;j+=2) {
763  FFSWAP(int, ptr[0], ptr[1]);
764  ptr += 2;
765  }
766  }
767 }
768 
769 int
771  AVStream *st, RMStream *ast, int len, AVPacket *pkt,
772  int *seq, int flags, int64_t timestamp)
773 {
774  RMDemuxContext *rm = s->priv_data;
775 
776  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
777  rm->current_stream= st->id;
778  if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len, seq, &timestamp))
779  return -1; //got partial frame
780  } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
781  if ((ast->deint_id == DEINT_ID_GENR) ||
782  (ast->deint_id == DEINT_ID_INT4) ||
783  (ast->deint_id == DEINT_ID_SIPR)) {
784  int x;
785  int sps = ast->sub_packet_size;
786  int cfs = ast->coded_framesize;
787  int h = ast->sub_packet_h;
788  int y = ast->sub_packet_cnt;
789  int w = ast->audio_framesize;
790 
791  if (flags & 2)
792  y = ast->sub_packet_cnt = 0;
793  if (!y)
794  ast->audiotimestamp = timestamp;
795 
796  switch (ast->deint_id) {
797  case DEINT_ID_INT4:
798  for (x = 0; x < h/2; x++)
799  avio_read(pb, ast->pkt.data+x*2*w+y*cfs, cfs);
800  break;
801  case DEINT_ID_GENR:
802  for (x = 0; x < w/sps; x++)
803  avio_read(pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
804  break;
805  case DEINT_ID_SIPR:
806  avio_read(pb, ast->pkt.data + y * w, w);
807  break;
808  }
809 
810  if (++(ast->sub_packet_cnt) < h)
811  return -1;
812  if (ast->deint_id == DEINT_ID_SIPR)
813  ff_rm_reorder_sipr_data(ast->pkt.data, h, w);
814 
815  ast->sub_packet_cnt = 0;
816  rm->audio_stream_num = st->index;
817  rm->audio_pkt_cnt = h * w / st->codec->block_align;
818  } else if ((ast->deint_id == DEINT_ID_VBRF) ||
819  (ast->deint_id == DEINT_ID_VBRS)) {
820  int x;
821  rm->audio_stream_num = st->index;
822  ast->sub_packet_cnt = (avio_rb16(pb) & 0xf0) >> 4;
823  if (ast->sub_packet_cnt) {
824  for (x = 0; x < ast->sub_packet_cnt; x++)
825  ast->sub_packet_lengths[x] = avio_rb16(pb);
826  rm->audio_pkt_cnt = ast->sub_packet_cnt;
827  ast->audiotimestamp = timestamp;
828  } else
829  return -1;
830  } else {
831  av_get_packet(pb, pkt, len);
832  rm_ac3_swap_bytes(st, pkt);
833  }
834  } else
835  av_get_packet(pb, pkt, len);
836 
837  pkt->stream_index = st->index;
838 
839 #if 0
840  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
841  if(st->codec->codec_id == AV_CODEC_ID_RV20){
842  int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
843  av_log(s, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
844 
845  seq |= (timestamp&~0x3FFF);
846  if(seq - timestamp > 0x2000) seq -= 0x4000;
847  if(seq - timestamp < -0x2000) seq += 0x4000;
848  }
849  }
850 #endif
851 
852  pkt->pts = timestamp;
853  if (flags & 2)
854  pkt->flags |= AV_PKT_FLAG_KEY;
855 
856  return st->codec->codec_type == AVMEDIA_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
857 }
858 
859 int
861  AVStream *st, RMStream *ast, AVPacket *pkt)
862 {
863  RMDemuxContext *rm = s->priv_data;
864 
865  av_assert0 (rm->audio_pkt_cnt > 0);
866 
867  if (ast->deint_id == DEINT_ID_VBRF ||
868  ast->deint_id == DEINT_ID_VBRS)
870  else {
871  if(av_new_packet(pkt, st->codec->block_align) < 0)
872  return AVERROR(ENOMEM);
873  memcpy(pkt->data, ast->pkt.data + st->codec->block_align * //FIXME avoid this
874  (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
875  st->codec->block_align);
876  }
877  rm->audio_pkt_cnt--;
878  if ((pkt->pts = ast->audiotimestamp) != AV_NOPTS_VALUE) {
880  pkt->flags = AV_PKT_FLAG_KEY;
881  } else
882  pkt->flags = 0;
883  pkt->stream_index = st->index;
884 
885  return rm->audio_pkt_cnt;
886 }
887 
889 {
890  RMDemuxContext *rm = s->priv_data;
891  AVStream *st = NULL; // init to silence compiler warning
892  int i, len, res, seq = 1;
893  int64_t timestamp, pos;
894  int flags;
895 
896  for (;;) {
897  if (rm->audio_pkt_cnt) {
898  // If there are queued audio packet return them first
899  st = s->streams[rm->audio_stream_num];
900  res = ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
901  if(res < 0)
902  return res;
903  flags = 0;
904  } else {
905  if (rm->old_format) {
906  RMStream *ast;
907 
908  st = s->streams[0];
909  ast = st->priv_data;
910  timestamp = AV_NOPTS_VALUE;
911  len = !ast->audio_framesize ? RAW_PACKET_SIZE :
912  ast->coded_framesize * ast->sub_packet_h / 2;
913  flags = (seq++ == 1) ? 2 : 0;
914  pos = avio_tell(s->pb);
915  } else {
916  len=sync(s, &timestamp, &flags, &i, &pos);
917  if (len > 0)
918  st = s->streams[i];
919  }
920 
921  if(len<0 || url_feof(s->pb))
922  return AVERROR(EIO);
923 
924  res = ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
925  &seq, flags, timestamp);
926  if((flags&2) && (seq&0x7F) == 1)
927  av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
928  if (res)
929  continue;
930  }
931 
932  if( (st->discard >= AVDISCARD_NONKEY && !(flags&2))
933  || st->discard >= AVDISCARD_ALL){
934  av_free_packet(pkt);
935  } else
936  break;
937  }
938 
939  return 0;
940 }
941 
943 {
944  int i;
945 
946  for (i=0;i<s->nb_streams;i++)
948 
949  return 0;
950 }
951 
952 static int rm_probe(AVProbeData *p)
953 {
954  /* check file header */
955  if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
956  p->buf[2] == 'M' && p->buf[3] == 'F' &&
957  p->buf[4] == 0 && p->buf[5] == 0) ||
958  (p->buf[0] == '.' && p->buf[1] == 'r' &&
959  p->buf[2] == 'a' && p->buf[3] == 0xfd))
960  return AVPROBE_SCORE_MAX;
961  else
962  return 0;
963 }
964 
965 static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
966  int64_t *ppos, int64_t pos_limit)
967 {
968  RMDemuxContext *rm = s->priv_data;
969  int64_t pos, dts;
970  int stream_index2, flags, len, h;
971 
972  pos = *ppos;
973 
974  if(rm->old_format)
975  return AV_NOPTS_VALUE;
976 
977  if (avio_seek(s->pb, pos, SEEK_SET) < 0)
978  return AV_NOPTS_VALUE;
979 
980  rm->remaining_len=0;
981  for(;;){
982  int seq=1;
983  AVStream *st;
984 
985  len=sync(s, &dts, &flags, &stream_index2, &pos);
986  if(len<0)
987  return AV_NOPTS_VALUE;
988 
989  st = s->streams[stream_index2];
990  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
991  h= avio_r8(s->pb); len--;
992  if(!(h & 0x40)){
993  seq = avio_r8(s->pb); len--;
994  }
995  }
996 
997  if((flags&2) && (seq&0x7F) == 1){
998  av_dlog(s, "%d %d-%d %"PRId64" %d\n",
999  flags, stream_index2, stream_index, dts, seq);
1000  av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
1001  if(stream_index2 == stream_index)
1002  break;
1003  }
1004 
1005  avio_skip(s->pb, len);
1006  }
1007  *ppos = pos;
1008  return dts;
1009 }
1010 
1011 static int rm_read_seek(AVFormatContext *s, int stream_index,
1012  int64_t pts, int flags)
1013 {
1014  RMDemuxContext *rm = s->priv_data;
1015 
1016  if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1017  return -1;
1018  rm->audio_pkt_cnt = 0;
1019  return 0;
1020 }
1021 
1022 
1024  .name = "rm",
1025  .long_name = NULL_IF_CONFIG_SMALL("RealMedia"),
1026  .priv_data_size = sizeof(RMDemuxContext),
1027  .read_probe = rm_probe,
1031  .read_timestamp = rm_read_dts,
1033 };
1034 
1036  .name = "rdt",
1037  .long_name = NULL_IF_CONFIG_SMALL("RDT demuxer"),
1038  .priv_data_size = sizeof(RMDemuxContext),
1040  .flags = AVFMT_NOFILE,
1041 };