-
Notifications
You must be signed in to change notification settings - Fork 27
/
multicat.c
1297 lines (1126 loc) · 38.3 KB
/
multicat.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*****************************************************************************
* multicat.c: netcat-equivalent for multicast
*****************************************************************************
* Copyright (C) 2009, 2011-2012, 2015-2017 VideoLAN
* $Id$
*
* Authors: Christophe Massiot <[email protected]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/* POLLRDHUP */
#define _GNU_SOURCE 1
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdint.h>
#include <stdbool.h>
#include <inttypes.h>
#include <string.h>
#include <errno.h>
#include <signal.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <pthread.h>
#include <poll.h>
#include <sys/ioctl.h>
#include <syslog.h>
#include <sys/uio.h>
#ifdef SIOCGSTAMPNS
# define HAVE_TIMESTAMPS
#endif
#ifndef POLLRDHUP
# define POLLRDHUP 0
#endif
#include <bitstream/ietf/rtp.h>
#include <bitstream/mpeg/ts.h>
#include <bitstream/mpeg/pes.h>
#include "util.h"
#undef DEBUG_WRITEBACK
#define POLL_TIMEOUT 1000 /* 1 s */
#define MAX_LATENESS INT64_C(27000000) /* 1 s */
#define FILE_FLUSH INT64_C(2700000) /* 100 ms */
#define MAX_PIDS 8192
#define POW2_33 UINT64_C(8589934592)
#define TS_CLOCK_MAX (POW2_33 * 27000000 / 90000)
#define MAX_PCR_INTERVAL (27000000 / 2)
/*****************************************************************************
* Local declarations
*****************************************************************************/
static int i_input_fd, i_output_fd;
FILE *p_input_aux, *p_output_aux;
static int i_ttl = 0;
static bool b_sleep = true;
static uint16_t i_pcr_pid = 0;
static bool b_overwrite_ssrc = false;
static in_addr_t i_ssrc = 0;
static bool b_input_udp = false, b_output_udp = false;
static size_t i_asked_payload_size = DEFAULT_PAYLOAD_SIZE;
static size_t i_rtp_header_size = RTP_HEADER_SIZE;
static uint64_t i_rotate_size = DEFAULT_ROTATE_SIZE;
static uint64_t i_rotate_offset = DEFAULT_ROTATE_OFFSET;
static uint64_t i_duration = 0;
static struct udprawpkt pktheader;
static bool b_raw_packets = false;
static uint8_t *pi_pid_cc_table = NULL;
/* PCR/PTS/DTS restamping */
static uint64_t i_last_pcr_date;
static uint64_t i_last_pcr = TS_CLOCK_MAX;
static uint64_t i_pcr_offset;
static volatile sig_atomic_t b_die = 0, b_error = 0;
static uint16_t i_rtp_seqnum;
static uint64_t i_stc = 0; /* system time clock, used for date calculations */
static uint64_t i_first_stc = 0;
static uint64_t i_pcr = 0, i_pcr_stc = 0; /* for RTP/TS output */
static uint64_t (*pf_Date)(void) = wall_Date;
static void (*pf_Sleep)( uint64_t ) = wall_Sleep;
static ssize_t (*pf_Read)( void *p_buf, size_t i_len );
static bool (*pf_Delay)(void) = NULL;
static void (*pf_ExitRead)(void);
static ssize_t (*pf_Write)( const void *p_buf, size_t i_len );
static void (*pf_ExitWrite)(void);
static void usage(void)
{
msg_Raw( NULL, "Usage: multicat [-i <RT priority>] [-l <syslogtag>] [-t <ttl>] [-X] [-T <file name>] [-f] [-p <PCR PID>] [-C] [-P] [-s <chunks>] [-n <chunks>] [-k <start time>] [-d <duration>] [-a] [-r <file duration>] [-O <rotate offset>] [-S <SSRC IP>] [-u] [-U] [-m <payload size>] [-R <RTP header size>] [-w] <input item> <output item>" );
msg_Raw( NULL, " item format: <file path | device path | FIFO path | directory path | network host>" );
msg_Raw( NULL, " host format: [<connect addr>[:<connect port>]][@[<bind addr][:<bind port>]]" );
msg_Raw( NULL, " -X: also pass-through all packets to stdout" );
msg_Raw( NULL, " -T: write an XML file with the current characteristics of transmission" );
msg_Raw( NULL, " -f: output packets as fast as possible" );
msg_Raw( NULL, " -p: overwrite or create RTP timestamps using PCR PID (MPEG-2/TS)" );
msg_Raw( NULL, " -C: rewrite continuity counters to be continuous" );
msg_Raw( NULL, " -P: restamp PCRs, DTSs, and PTSs" );
msg_Raw( NULL, " -s: skip the first N chunks of payload [deprecated]" );
msg_Raw( NULL, " -n: exit after playing N chunks of payload [deprecated]" );
msg_Raw( NULL, " -k: start at the given position (in 27 MHz units, negative = from the end)" );
msg_Raw( NULL, " -d: exit after definite time (in 27 MHz units)" );
msg_Raw( NULL, " -a: append to existing destination file (risky)" );
msg_Raw( NULL, " -r: in directory mode, rotate file after this duration (default: 97200000000 ticks = 1 hour)" );
msg_Raw( NULL, " -O: in directory mode, rotate file after duration + this offset (default: 0 tick = calendar hour)" );
msg_Raw( NULL, " -S: overwrite or create RTP SSRC" );
msg_Raw( NULL, " -u: source has no RTP header, possibly a udp source" );
msg_Raw( NULL, " -U: destination has no RTP header" );
msg_Raw( NULL, " -m: size of the payload chunk, excluding optional RTP header (default 1316)" );
msg_Raw( NULL, " -R: size of the optional RTP header (default 12)" );
msg_Raw( NULL, " -w: send with RAW (needed for /srcaddr)" );
exit(EXIT_FAILURE);
}
/*****************************************************************************
* Signal Handler
*****************************************************************************/
static void SigHandler( int i_signal )
{
b_die = b_error = 1;
}
/*****************************************************************************
* Poll: factorize polling code
*****************************************************************************/
static bool Poll(void)
{
struct pollfd pfd;
int i_ret;
pfd.fd = i_input_fd;
pfd.events = POLLIN | POLLERR | POLLRDHUP | POLLHUP;
i_ret = poll( &pfd, 1, POLL_TIMEOUT );
if ( i_ret < 0 )
{
msg_Err( NULL, "poll error (%s)", strerror(errno) );
b_die = b_error = 1;
return false;
}
if ( pfd.revents & (POLLERR | POLLRDHUP | POLLHUP) )
{
msg_Err( NULL, "poll error" );
b_die = b_error = 1;
return false;
}
if ( !i_ret ) return false;
return true;
}
/*****************************************************************************
* tcp_*: TCP socket handlers (only what differs from UDP)
*****************************************************************************/
static uint8_t *p_tcp_buffer = NULL;
static size_t i_tcp_size = 0;
static ssize_t tcp_Read( void *p_buf, size_t i_len )
{
if ( p_tcp_buffer == NULL )
p_tcp_buffer = malloc(i_len);
uint8_t *p_read_buffer;
ssize_t i_read_size = i_len;
p_read_buffer = p_tcp_buffer + i_tcp_size;
i_read_size -= i_tcp_size;
if ( (i_read_size = recv( i_input_fd, p_read_buffer, i_read_size, 0 )) < 0 )
{
msg_Err( NULL, "recv error (%s)", strerror(errno) );
b_die = b_error = 1;
return 0;
}
i_tcp_size += i_read_size;
i_stc = pf_Date();
if ( i_tcp_size != i_len )
return 0;
memcpy( p_buf, p_tcp_buffer, i_len );
i_tcp_size = 0;
return i_len;
}
/*****************************************************************************
* udp_*: UDP socket handlers
*****************************************************************************/
static off_t i_udp_nb_skips = 0;
static bool b_tcp = false;
static ssize_t udp_Read( void *p_buf, size_t i_len )
{
ssize_t i_ret;
if ( !i_udp_nb_skips && !i_first_stc )
i_first_stc = pf_Date();
if ( !Poll() )
{
i_stc = pf_Date();
return 0;
}
if ( !b_tcp )
{
if ( (i_ret = recv( i_input_fd, p_buf, i_len, 0 )) < 0 )
{
msg_Err( NULL, "recv error (%s)", strerror(errno) );
b_die = b_error = 1;
return 0;
}
#ifdef HAVE_TIMESTAMPS
struct timespec ts;
if ( !ioctl( i_input_fd, SIOCGSTAMPNS, &ts ) )
i_stc = ts.tv_sec * UINT64_C(27000000) + ts.tv_nsec * 27 / 1000;
else
#endif
i_stc = pf_Date();
}
else
i_ret = tcp_Read( p_buf, i_len );
if ( i_udp_nb_skips )
{
i_udp_nb_skips--;
return 0;
}
return i_ret;
}
static void udp_ExitRead(void)
{
close( i_input_fd );
if ( p_tcp_buffer != NULL )
free( p_tcp_buffer );
}
static int udp_InitRead( const char *psz_arg, size_t i_len,
off_t i_nb_skipped_chunks, int64_t i_pos )
{
if ( i_pos || (i_input_fd = OpenSocket( psz_arg, i_ttl, DEFAULT_PORT, 0,
NULL, &b_tcp, NULL )) < 0 )
return -1;
i_udp_nb_skips = i_nb_skipped_chunks;
pf_Read = udp_Read;
pf_ExitRead = udp_ExitRead;
#ifdef HAVE_TIMESTAMPS
if ( !b_tcp )
pf_Date = real_Date;
#endif
return 0;
}
static ssize_t raw_Write( const void *p_buf, size_t i_len )
{
#ifndef __APPLE__
ssize_t i_ret;
struct iovec iov[2];
#if defined(__FreeBSD__)
pktheader.udph.uh_ulen
#else
pktheader.udph.len
#endif
= htons(sizeof(struct udphdr) + i_len);
#if defined(__FreeBSD__)
pktheader.iph.ip_len = htons(sizeof(struct udprawpkt) + i_len);
#endif
iov[0].iov_base = &pktheader;
iov[0].iov_len = sizeof(struct udprawpkt);
iov[1].iov_base = (void *) p_buf;
iov[1].iov_len = i_len;
if ( (i_ret = writev( i_output_fd, iov, 2 )) < 0 )
{
if ( errno == EBADF || errno == ECONNRESET || errno == EPIPE )
{
msg_Err( NULL, "write error (%s)", strerror(errno) );
b_die = b_error = 1;
}
/* otherwise do not set b_die because these errors can be transient */
return 0;
}
return i_ret;
#else
return -1;
#endif
}
/* Please note that the write functions also work for TCP */
static ssize_t udp_Write( const void *p_buf, size_t i_len )
{
ssize_t i_ret;
if ( (i_ret = send( i_output_fd, p_buf, i_len, 0 )) < 0 )
{
if ( errno == EBADF || errno == ECONNRESET || errno == EPIPE )
{
msg_Err( NULL, "write error (%s)", strerror(errno) );
b_die = b_error = 1;
}
/* otherwise do not set b_die because these errors can be transient */
return 0;
}
return i_ret;
}
static void udp_ExitWrite(void)
{
close( i_output_fd );
}
static int udp_InitWrite( const char *psz_arg, size_t i_len, bool b_append )
{
struct opensocket_opt opt;
memset(&opt, 0, sizeof(struct opensocket_opt));
if (b_raw_packets) {
opt.p_raw_pktheader = &pktheader;
}
if ( (i_output_fd = OpenSocket( psz_arg, i_ttl, 0, DEFAULT_PORT,
NULL, NULL, &opt )) < 0 )
return -1;
if (b_raw_packets) {
pf_Write = raw_Write;
} else {
pf_Write = udp_Write;
}
pf_ExitWrite = udp_ExitWrite;
return 0;
}
/*****************************************************************************
* stream_*: FIFO and character device handlers
*****************************************************************************/
static off_t i_stream_nb_skips = 0;
static ssize_t i_buf_offset = 0;
static ssize_t stream_Read( void *p_buf, size_t i_len )
{
ssize_t i_ret;
if ( !i_stream_nb_skips && !i_first_stc )
i_first_stc = pf_Date();
if ( !Poll() )
{
i_stc = pf_Date();
return 0;
}
if ( (i_ret = read( i_input_fd, p_buf + i_buf_offset,
i_len - i_buf_offset )) < 0 )
{
msg_Err( NULL, "read error (%s)", strerror(errno) );
b_die = b_error = 1;
return 0;
}
i_stc = pf_Date();
i_buf_offset += i_ret;
if ( i_buf_offset < i_len )
return 0;
i_ret = i_buf_offset;
i_buf_offset = 0;
if ( i_stream_nb_skips )
{
i_stream_nb_skips--;
return 0;
}
return i_ret;
}
static void stream_ExitRead(void)
{
close( i_input_fd );
}
static int stream_InitRead( const char *psz_arg, size_t i_len,
off_t i_nb_skipped_chunks, int64_t i_pos )
{
if ( i_pos ) return -1;
i_input_fd = OpenFile( psz_arg, true, false );
if ( i_input_fd < 0 ) return -1;
i_stream_nb_skips = i_nb_skipped_chunks;
pf_Read = stream_Read;
pf_ExitRead = stream_ExitRead;
return 0;
}
static ssize_t stream_Write( const void *p_buf, size_t i_len )
{
ssize_t i_ret;
retry:
if ( (i_ret = write( i_output_fd, p_buf, i_len )) < 0 )
{
if (errno == EAGAIN || errno == EINTR)
goto retry;
msg_Err( NULL, "write error (%s)", strerror(errno) );
b_die = b_error = 1;
}
return i_ret;
}
static void stream_ExitWrite(void)
{
close( i_output_fd );
}
static int stream_InitWrite( const char *psz_arg, size_t i_len, bool b_append )
{
i_output_fd = OpenFile( psz_arg, false, b_append );
if ( i_output_fd < 0 ) return -1;
pf_Write = stream_Write;
pf_ExitWrite = stream_ExitWrite;
return 0;
}
/*****************************************************************************
* file_*: handler for the auxiliary file format
*****************************************************************************/
static uint64_t i_file_next_flush = 0;
static ssize_t file_Read( void *p_buf, size_t i_len )
{
uint8_t p_aux[8];
ssize_t i_ret;
if ( (i_ret = read( i_input_fd, p_buf, i_len )) < 0 )
{
msg_Err( NULL, "read error (%s)", strerror(errno) );
b_die = b_error = 1;
return 0;
}
if ( i_ret == 0 )
{
msg_Dbg( NULL, "end of file reached" );
b_die = 1;
return 0;
}
if ( fread( p_aux, 8, 1, p_input_aux ) != 1 )
{
msg_Warn( NULL, "premature end of aux file reached" );
b_die = b_error = 1;
return 0;
}
i_stc = FromSTC( p_aux );
if ( !i_first_stc ) i_first_stc = i_stc;
return i_ret;
}
static bool file_Delay(void)
{
/* for correct throughput without rounding approximations */
static uint64_t i_file_first_stc = 0, i_file_first_wall = 0;
uint64_t i_wall = pf_Date();
if ( !i_file_first_wall )
{
i_file_first_wall = i_wall;
i_file_first_stc = i_stc;
}
else
{
int64_t i_delay = (i_stc - i_file_first_stc) -
(i_wall - i_file_first_wall);
if ( i_delay > 0 )
pf_Sleep( i_delay );
else if ( i_delay < -MAX_LATENESS )
{
msg_Warn( NULL, "too much lateness, resetting clocks" );
i_file_first_wall = i_wall;
i_file_first_stc = i_stc;
}
}
return true;
}
static void file_ExitRead(void)
{
close( i_input_fd );
fclose( p_input_aux );
}
static int file_InitRead( const char *psz_arg, size_t i_len,
off_t i_nb_skipped_chunks, int64_t i_pos )
{
char *psz_aux_file = GetAuxFile( psz_arg, i_len );
if ( i_pos )
{
i_nb_skipped_chunks = LookupAuxFile( psz_aux_file, i_pos, false );
if ( i_nb_skipped_chunks < 0 )
{
free( psz_aux_file );
return -1;
}
}
i_input_fd = OpenFile( psz_arg, true, false );
if ( i_input_fd < 0 )
{
free(psz_aux_file);
return -1;
}
p_input_aux = OpenAuxFile( psz_aux_file, true, false );
free( psz_aux_file );
if ( p_input_aux == NULL ) return -1;
lseek( i_input_fd, (off_t)i_len * i_nb_skipped_chunks, SEEK_SET );
fseeko( p_input_aux, 8 * i_nb_skipped_chunks, SEEK_SET );
pf_Read = file_Read;
pf_Delay = file_Delay;
pf_ExitRead = file_ExitRead;
return 0;
}
static ssize_t file_Write( const void *p_buf, size_t i_len )
{
uint8_t p_aux[8];
ssize_t i_ret;
#ifdef DEBUG_WRITEBACK
uint64_t start = pf_Date(), end;
#endif
if ( (i_ret = write( i_output_fd, p_buf, i_len )) < 0 )
{
msg_Err( NULL, "couldn't write to file (%s)", strerror(errno) );
b_die = b_error = 1;
return i_ret;
}
#ifdef DEBUG_WRITEBACK
end = pf_Date();
if (end - start > 270000) /* 10 ms */
msg_Err(NULL, "too long waiting in write(%"PRId64")", (end - start) / 27000);
#endif
ToSTC( p_aux, i_stc );
if ( fwrite( p_aux, 8, 1, p_output_aux ) != 1 )
{
msg_Err( NULL, "couldn't write to auxiliary file" );
b_die = b_error = 1;
}
if (!i_file_next_flush)
i_file_next_flush = i_stc + FILE_FLUSH;
else if (i_file_next_flush <= i_stc)
{
fflush( p_output_aux );
i_file_next_flush = i_stc + FILE_FLUSH;
}
return i_ret;
}
static void file_ExitWrite(void)
{
close( i_output_fd );
fclose( p_output_aux );
}
static int file_InitWrite( const char *psz_arg, size_t i_len, bool b_append )
{
char *psz_aux_file = GetAuxFile( psz_arg, i_len );
if ( b_append )
CheckFileSizes( psz_arg, psz_aux_file, i_len );
i_output_fd = OpenFile( psz_arg, false, b_append );
if ( i_output_fd < 0 ) return -1;
p_output_aux = OpenAuxFile( psz_aux_file, false, b_append );
free( psz_aux_file );
if ( p_output_aux == NULL ) return -1;
pf_Write = file_Write;
pf_ExitWrite = file_ExitWrite;
return 0;
}
/*****************************************************************************
* dir_*: handler for the auxiliary directory format
*****************************************************************************/
static char *psz_input_dir_name;
static size_t i_input_dir_len;
static uint64_t i_input_dir_file;
static uint64_t i_input_dir_delay;
static ssize_t dir_Read( void *p_buf, size_t i_len )
{
for ( ; ; )
{
ssize_t i_ret = file_Read( p_buf, i_len );
if ( i_ret > 0 ) return i_ret;
b_die = 0; /* we're not dead yet */
close( i_input_fd );
fclose( p_input_aux );
i_input_fd = 0;
p_input_aux = NULL;
for ( ; ; )
{
i_input_dir_file++;
i_input_fd = OpenDirFile( psz_input_dir_name, i_input_dir_file,
true, i_input_dir_len, &p_input_aux );
if ( i_input_fd > 0 ) break;
if ( i_input_dir_file * i_rotate_size + i_rotate_offset >
i_first_stc + i_duration )
{
msg_Err( NULL, "end of files reached" );
b_die = 1;
return 0;
}
msg_Warn( NULL, "missing segment" );
}
}
}
static bool dir_Delay(void)
{
uint64_t i_wall = pf_Date() - i_input_dir_delay;
int64_t i_delay = i_stc - i_wall;
if ( i_delay > 0 )
pf_Sleep( i_delay );
else if ( i_delay < -MAX_LATENESS )
{
msg_Warn( NULL, "dropping late packet" );
return false;
}
return true;
}
static void dir_ExitRead(void)
{
free( psz_input_dir_name );
if ( i_input_fd > 0 )
{
close( i_input_fd );
fclose( p_input_aux );
}
}
static int dir_InitRead( const char *psz_arg, size_t i_len,
off_t i_nb_skipped_chunks, int64_t i_pos )
{
if ( i_nb_skipped_chunks )
{
msg_Err( NULL, "unable to skip chunks with directory input" );
return -1;
}
if ( i_pos <= 0 )
i_pos += real_Date();
if ( i_pos <= 0 )
{
msg_Err( NULL, "invalid position" );
return -1;
}
i_first_stc = i_stc = i_pos;
i_input_dir_delay = real_Date() - i_stc;
psz_input_dir_name = strdup( psz_arg );
i_input_dir_len = i_len;
i_input_dir_file = GetDirFile( i_rotate_size, i_rotate_offset, i_pos );
for ( ; ; )
{
i_nb_skipped_chunks = LookupDirAuxFile( psz_input_dir_name,
i_input_dir_file, i_stc,
i_input_dir_len );
if ( i_nb_skipped_chunks >= 0 ) break;
if ( i_input_dir_file * i_rotate_size + i_rotate_offset >
i_stc + i_duration )
{
msg_Err( NULL, "position not found" );
return -1;
}
i_input_dir_file++;
msg_Warn( NULL, "missing segment" );
}
i_input_fd = OpenDirFile( psz_input_dir_name, i_input_dir_file,
true, i_input_dir_len, &p_input_aux );
lseek( i_input_fd, (off_t)i_len * i_nb_skipped_chunks, SEEK_SET );
fseeko( p_input_aux, 8 * i_nb_skipped_chunks, SEEK_SET );
pf_Date = real_Date;
pf_Sleep = real_Sleep;
pf_Read = dir_Read;
pf_Delay = dir_Delay;
pf_ExitRead = dir_ExitRead;
return 0;
}
static char *psz_output_dir_name;
static size_t i_output_dir_len;
static uint64_t i_output_dir_file;
static ssize_t dir_Write( const void *p_buf, size_t i_len )
{
uint64_t i_dir_file = GetDirFile( i_rotate_size, i_rotate_offset, i_stc );
if ( !i_output_fd || i_dir_file != i_output_dir_file )
{
if ( i_output_fd )
{
close( i_output_fd );
fclose( p_output_aux );
}
i_output_dir_file = i_dir_file;
i_output_fd = OpenDirFile( psz_output_dir_name, i_output_dir_file,
false, i_output_dir_len, &p_output_aux );
}
return file_Write( p_buf, i_len );
}
static void dir_ExitWrite(void)
{
free( psz_output_dir_name );
if ( i_output_fd )
{
close( i_output_fd );
fclose( p_output_aux );
}
}
static int dir_InitWrite( const char *psz_arg, size_t i_len, bool b_append )
{
psz_output_dir_name = strdup( psz_arg );
i_output_dir_len = i_len;
i_output_dir_file = 0;
i_output_fd = 0;
pf_Date = real_Date;
pf_Sleep = real_Sleep;
pf_Write = dir_Write;
pf_ExitWrite = dir_ExitWrite;
return 0;
}
/*****************************************************************************
* GetPCR: read PCRs to align RTP timestamps with PCR scale (RFC compliance)
*****************************************************************************/
static void GetPCR( const uint8_t *p_buffer, size_t i_read_size )
{
while ( i_read_size >= TS_SIZE )
{
uint16_t i_pid = ts_get_pid( p_buffer );
if ( !ts_validate( p_buffer ) )
{
msg_Warn( NULL, "invalid TS packet (sync=0x%x)", p_buffer[0] );
}
else if ( (i_pid == i_pcr_pid || i_pcr_pid == 8192)
&& ts_has_adaptation(p_buffer) && ts_get_adaptation(p_buffer)
&& tsaf_has_pcr(p_buffer) )
{
i_pcr = tsaf_get_pcr( p_buffer ) * 300 + tsaf_get_pcrext( p_buffer );
i_pcr_stc = i_stc;
}
p_buffer += TS_SIZE;
i_read_size -= TS_SIZE;
}
}
/*****************************************************************************
* FixCC: fix continuity counters
*****************************************************************************/
static void FixCC( uint8_t *p_buffer, size_t i_read_size )
{
while ( i_read_size >= TS_SIZE )
{
uint16_t i_pid = ts_get_pid( p_buffer );
if ( !ts_validate( p_buffer ) )
{
msg_Warn( NULL, "invalid TS packet (sync=0x%x)", p_buffer[0] );
}
else
{
if ( pi_pid_cc_table[i_pid] == 0x10 )
{
msg_Dbg( NULL, "new pid entry %d", i_pid );
pi_pid_cc_table[i_pid] = 0;
}
else if ( ts_has_payload( p_buffer ) )
{
pi_pid_cc_table[i_pid] = (pi_pid_cc_table[i_pid] + 1) % 0x10;
}
ts_set_cc( p_buffer, pi_pid_cc_table[i_pid] );
}
p_buffer += TS_SIZE;
i_read_size -= TS_SIZE;
}
}
/*****************************************************************************
* RestampPCR
*****************************************************************************/
static void RestampPCR(uint8_t *p_ts)
{
uint64_t i_pcr = tsaf_get_pcr(p_ts) * 300 + tsaf_get_pcrext(p_ts);
bool b_discontinuity = tsaf_has_discontinuity(p_ts);
if (i_last_pcr == TS_CLOCK_MAX)
i_last_pcr = i_pcr;
else {
/* handle 2^33 wrap-arounds */
uint64_t i_delta =
(TS_CLOCK_MAX + i_pcr -
(i_last_pcr % TS_CLOCK_MAX)) % TS_CLOCK_MAX;
if (i_delta <= MAX_PCR_INTERVAL && !b_discontinuity)
i_last_pcr = i_pcr;
else {
msg_Warn( NULL, "PCR discontinuity (%"PRIu64")", i_delta );
i_last_pcr += i_stc - i_last_pcr_date;
i_last_pcr %= TS_CLOCK_MAX;
i_pcr_offset += TS_CLOCK_MAX + i_last_pcr - i_pcr;
i_pcr_offset %= TS_CLOCK_MAX;
i_last_pcr = i_pcr;
}
}
i_last_pcr_date = i_stc;
if (!i_pcr_offset)
return;
i_pcr += i_pcr_offset;
i_pcr %= TS_CLOCK_MAX;
tsaf_set_pcr(p_ts, i_pcr / 300);
tsaf_set_pcrext(p_ts, i_pcr % 300);
tsaf_clear_discontinuity(p_ts);
}
/*****************************************************************************
* RestampTS
*****************************************************************************/
static uint64_t RestampTS(uint64_t i_ts)
{
i_ts += i_pcr_offset;
i_ts %= TS_CLOCK_MAX;
return i_ts;
}
/*****************************************************************************
* Restamp: Restamp PCRs, DTSs and PTSs
*****************************************************************************/
static void Restamp( uint8_t *p_buffer, size_t i_read_size )
{
while ( i_read_size >= TS_SIZE )
{
if ( !ts_validate( p_buffer ) )
{
msg_Warn( NULL, "invalid TS packet (sync=0x%x)", p_buffer[0] );
}
else
{
if (ts_has_adaptation(p_buffer) && ts_get_adaptation(p_buffer) &&
tsaf_has_pcr(p_buffer))
RestampPCR(p_buffer);
uint16_t header_size = TS_HEADER_SIZE +
(ts_has_adaptation(p_buffer) ? 1 : 0) +
ts_get_adaptation(p_buffer);
if (ts_get_unitstart(p_buffer) && ts_has_payload(p_buffer) &&
header_size + PES_HEADER_SIZE_PTS <= TS_SIZE &&
pes_validate(p_buffer + header_size) &&
pes_get_streamid(p_buffer + header_size) !=
PES_STREAM_ID_PRIVATE_2 &&
pes_validate_header(p_buffer + header_size) &&
pes_has_pts(p_buffer + header_size)
/* disable the check as this is a common mistake */
/* && pes_validate_pts(p_buffer + header_size) */) {
pes_set_pts(p_buffer + header_size,
RestampTS(pes_get_pts(p_buffer + header_size) * 300) /
300);
if (header_size + PES_HEADER_SIZE_PTSDTS <= TS_SIZE &&
pes_has_dts(p_buffer + header_size)
/* && pes_validate_dts(p_buffer + header_size) */)
pes_set_dts(p_buffer + header_size,
RestampTS(pes_get_dts(p_buffer + header_size) * 300) /
300);
}
}
p_buffer += TS_SIZE;
i_read_size -= TS_SIZE;
}
}
/*****************************************************************************
* Entry point
*****************************************************************************/
int main( int i_argc, char **pp_argv )
{
int i_priority = -1;
const char *psz_syslog_tag = NULL;
bool b_passthrough = false;
bool b_restamp = false;
int i_stc_fd = -1;
off_t i_skip_chunks = 0, i_nb_chunks = -1;
int64_t i_seek = 0;
bool b_append = false;
uint8_t *p_buffer, *p_read_buffer;
size_t i_max_read_size, i_max_write_size;
int c;
struct sigaction sa;
sigset_t set;
/* Parse options */
while ( (c = getopt( i_argc, pp_argv, "i:l:t:XT:fp:CPs:n:k:d:ar:O:S:uUm:R:wh" )) != -1 )
{
switch ( c )
{
case 'i':
i_priority = strtol( optarg, NULL, 0 );
break;
case 'l':
psz_syslog_tag = optarg;
break;
case 't':
i_ttl = strtol( optarg, NULL, 0 );
break;
case 'X':
b_passthrough = true;
break;
case 'T':
i_stc_fd = open( optarg, O_WRONLY | O_CREAT | O_TRUNC, 0644 );
if ( i_stc_fd < 0 )
msg_Warn( NULL, "unable to open %s (%s)\n", optarg,
strerror(errno) );
break;
case 'f':
b_sleep = false;
break;
case 'p':
i_pcr_pid = strtol( optarg, NULL, 0 );
break;
case 'C':
pi_pid_cc_table = malloc(MAX_PIDS * sizeof(uint8_t));
memset(pi_pid_cc_table, 0x10, MAX_PIDS * sizeof(uint8_t));
break;
case 'P':
b_restamp = true;
break;
case 's':
i_skip_chunks = strtol( optarg, NULL, 0 );
break;
case 'n':
i_nb_chunks = strtol( optarg, NULL, 0 );
break;