-
Notifications
You must be signed in to change notification settings - Fork 313
/
Copy pathgen_packets.c
962 lines (765 loc) · 29.5 KB
/
gen_packets.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
//
// This file is part of Dire Wolf, an amateur radio packet TNC.
//
// Copyright (C) 2011, 2013, 2014, 2015, 2016, 2019 John Langner, WB2OSZ
//
// 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, see <http://www.gnu.org/licenses/>.
//
/*------------------------------------------------------------------
*
* Name: gen_packets.c
*
* Purpose: Test program for generating AX.25 frames.
*
* Description: Given messages are converted to audio and written
* to a .WAV type audio file.
*
* Bugs: Most options are implemented for only one audio channel.
*
* Examples: Different speeds:
*
* gen_packets -o z1.wav
* atest z1.wav
*
* gen_packets -B 300 -o z3.wav
* atest -B 300 z3.wav
*
* gen_packets -B 9600 -o z9.wav
* atest -B 300 z9.wav
*
* User-defined content:
*
* echo "WB2OSZ>APDW12:This is a test" | gen_packets -o z.wav -
* atest z.wav
*
* echo "WB2OSZ>APDW12:Test line 1" > z.txt
* echo "WB2OSZ>APDW12:Test line 2" >> z.txt
* echo "WB2OSZ>APDW12:Test line 3" >> z.txt
* gen_packets -o z.wav z.txt
* atest z.wav
*
* With artificial noise added:
*
* gen_packets -n 100 -o z2.wav
* atest z2.wav
*
*
*------------------------------------------------------------------*/
#include "direwolf.h"
#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include <string.h>
#include <assert.h>
#include "audio.h"
#include "ax25_pad.h"
#include "hdlc_send.h"
#include "gen_tone.h"
#include "textcolor.h"
#include "morse.h"
#include "dtmf.h"
#include "fx25.h"
/* Own random number generator so we can get */
/* same results on Windows and Linux. */
#define MY_RAND_MAX 0x7fffffff
static int seed = 1;
static int my_rand (void) {
// Perform the calculation as unsigned to avoid signed overflow error.
seed = (int)(((unsigned)seed * 1103515245) + 12345) & MY_RAND_MAX;
return (seed);
}
static void usage (char **argv);
static int audio_file_open (char *fname, struct audio_s *pa);
static int audio_file_close (void);
static int g_add_noise = 0;
static float g_noise_level = 0;
static int g_morse_wpm = 0; /* Send morse code at this speed. */
static struct audio_s modem;
static void send_packet (char *str)
{
packet_t pp;
unsigned char fbuf[AX25_MAX_PACKET_LEN+2];
int flen;
int c;
if (g_morse_wpm > 0) {
// TODO: Why not use the destination field instead of command line option?
morse_send (0, str, g_morse_wpm, 100, 100);
}
else {
pp = ax25_from_text (str, 1);
if (pp == NULL) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("\"%s\" is not valid TNC2 monitoring format.\n", str);
return;
}
flen = ax25_pack (pp, fbuf);
for (c=0; c<modem.adev[0].num_channels; c++)
{
#if 1
int samples_per_symbol, n, j;
// Insert random amount of quiet time.
if (modem.achan[c].modem_type == MODEM_QPSK) {
samples_per_symbol = modem.adev[0].samples_per_sec / (modem.achan[c].baud / 2);
}
else if (modem.achan[c].modem_type == MODEM_8PSK) {
samples_per_symbol = modem.adev[0].samples_per_sec / (modem.achan[c].baud / 3);
}
else {
samples_per_symbol = modem.adev[0].samples_per_sec / modem.achan[c].baud;
}
// Provide enough time for the DCD to drop.
// Then throw in a random amount of time so that receiving
// DPLL will need to adjust to a new phase.
n = samples_per_symbol * (32 + (float)my_rand() / (float)MY_RAND_MAX );
for (j=0; j<n; j++) {
gen_tone_put_sample (c, 0, 0);
}
#endif
hdlc_send_flags (c, 8, 0);
hdlc_send_flags (c, 8, 0);
hdlc_send_flags (c, 8, 0);
hdlc_send_flags (c, 8, 0);
hdlc_send_frame (c, fbuf, flen, 0, modem.fx25_xmit_enable);
hdlc_send_flags (c, 2, 1);
}
ax25_delete (pp);
}
}
int main(int argc, char **argv)
{
int c;
//int digit_optind = 0;
int err;
int packet_count = 0;
int i;
int chan;
int g_opt = 0;
int j_opt = 0;
int J_opt = 0;
/*
* Set up default values for the modem.
*/
memset (&modem, 0, sizeof(modem));
modem.adev[0].defined = 1;
modem.adev[0].num_channels = DEFAULT_NUM_CHANNELS; /* -2 stereo */
modem.adev[0].samples_per_sec = DEFAULT_SAMPLES_PER_SEC; /* -r option */
modem.adev[0].bits_per_sample = DEFAULT_BITS_PER_SAMPLE; /* -8 for 8 instead of 16 bits */
for (chan = 0; chan < MAX_CHANS; chan++) {
modem.achan[chan].modem_type = MODEM_AFSK; /* change with -g */
modem.achan[chan].mark_freq = DEFAULT_MARK_FREQ; /* -m option */
modem.achan[chan].space_freq = DEFAULT_SPACE_FREQ; /* -s option */
modem.achan[chan].baud = DEFAULT_BAUD; /* -b option */
}
modem.achan[0].medium = MEDIUM_RADIO;
/*
* Set up other default values.
*/
int amplitude = 50; /* -a option */
/* 100% is actually half of the digital signal range so */
/* we have some headroom for adding noise, etc. */
int leading_zeros = 12; /* -z option TODO: not implemented, should replace with txdelay frames. */
char output_file[256]; /* -o option */
FILE *input_fp = NULL; /* File or NULL for built-in message */
strlcpy (output_file, "", sizeof(output_file));
/*
* Parse the command line options.
*/
while (1) {
//int this_option_optind = optind ? optind : 1;
int option_index = 0;
static struct option long_options[] = {
{"future1", 1, 0, 0},
{"future2", 0, 0, 0},
{"future3", 1, 0, 'c'},
{0, 0, 0, 0}
};
/* ':' following option character means arg is required. */
c = getopt_long(argc, argv, "gjJm:s:a:b:B:r:n:N:o:z:82M:X:",
long_options, &option_index);
if (c == -1)
break;
switch (c) {
case 0: /* possible future use */
text_color_set(DW_COLOR_INFO);
dw_printf("option %s", long_options[option_index].name);
if (optarg) {
dw_printf(" with arg %s", optarg);
}
dw_printf("\n");
break;
case 'b': /* -b for data Bit rate */
modem.achan[0].baud = atoi(optarg);
text_color_set(DW_COLOR_INFO);
dw_printf ("Data rate set to %d bits / second.\n", modem.achan[0].baud);
if (modem.achan[0].baud < MIN_BAUD || modem.achan[0].baud > MAX_BAUD) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Use a more reasonable bit rate in range of %d - %d.\n", MIN_BAUD, MAX_BAUD);
exit (EXIT_FAILURE);
}
break;
case 'B': /* -B for data Bit rate */
/* 300 implies 1600/1800 AFSK. */
/* 1200 implies 1200/2200 AFSK. */
/* 9600 implies scrambled. */
/* If you want something else, specify -B first */
/* then anything to override these defaults with -m, -s, or -g. */
// FIXME: options should not be order dependent.
modem.achan[0].baud = atoi(optarg);
text_color_set(DW_COLOR_INFO);
dw_printf ("Data rate set to %d bits / second.\n", modem.achan[0].baud);
if (modem.achan[0].baud != 100 && (modem.achan[0].baud < MIN_BAUD || modem.achan[0].baud > MAX_BAUD)) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Use a more reasonable bit rate in range of %d - %d.\n", MIN_BAUD, MAX_BAUD);
exit (EXIT_FAILURE);
}
/* We have similar logic in direwolf.c, config.c, gen_packets.c, and atest.c, */
/* that need to be kept in sync. Maybe it could be a common function someday. */
if (modem.achan[0].baud == 100) {
modem.achan[0].modem_type = MODEM_AFSK;
modem.achan[0].mark_freq = 1615;
modem.achan[0].space_freq = 1785;
}
else if (modem.achan[0].baud < 600) {
modem.achan[0].modem_type = MODEM_AFSK;
modem.achan[0].mark_freq = 1600; // Typical for HF SSB
modem.achan[0].space_freq = 1800;
}
else if (modem.achan[0].baud < 1800) {
modem.achan[0].modem_type = MODEM_AFSK;
modem.achan[0].mark_freq = DEFAULT_MARK_FREQ;
modem.achan[0].space_freq = DEFAULT_SPACE_FREQ;
}
else if (modem.achan[0].baud < 3600) {
modem.achan[0].modem_type = MODEM_QPSK;
modem.achan[0].mark_freq = 0;
modem.achan[0].space_freq = 0;
dw_printf ("Using V.26 QPSK rather than AFSK.\n");
if (modem.achan[0].baud != 2400) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Bit rate should be standard 2400 rather than specified %d.\n", modem.achan[0].baud);
}
}
else if (modem.achan[0].baud < 7200) {
modem.achan[0].modem_type = MODEM_8PSK;
modem.achan[0].mark_freq = 0;
modem.achan[0].space_freq = 0;
dw_printf ("Using V.27 8PSK rather than AFSK.\n");
if (modem.achan[0].baud != 4800) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Bit rate should be standard 4800 rather than specified %d.\n", modem.achan[0].baud);
}
}
else {
modem.achan[0].modem_type = MODEM_SCRAMBLE;
text_color_set(DW_COLOR_INFO);
dw_printf ("Using scrambled baseband signal rather than AFSK.\n");
}
break;
case 'g': /* -g for g3ruh scrambling */
g_opt = 1;
break;
case 'j': /* -j V.26 compatible with earlier direwolf. */
j_opt = 1;
break;
case 'J': /* -J V.26 compatible with MFJ-2400. */
J_opt = 1;
break;
case 'm': /* -m for Mark freq */
modem.achan[0].mark_freq = atoi(optarg);
text_color_set(DW_COLOR_INFO);
dw_printf ("Mark frequency set to %d Hz.\n", modem.achan[0].mark_freq);
if (modem.achan[0].mark_freq < 300 || modem.achan[0].mark_freq > 3000) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Use a more reasonable value in range of 300 - 3000.\n");
exit (EXIT_FAILURE);
}
break;
case 's': /* -s for Space freq */
modem.achan[0].space_freq = atoi(optarg);
text_color_set(DW_COLOR_INFO);
dw_printf ("Space frequency set to %d Hz.\n", modem.achan[0].space_freq);
if (modem.achan[0].space_freq < 300 || modem.achan[0].space_freq > 3000) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Use a more reasonable value in range of 300 - 3000.\n");
exit (EXIT_FAILURE);
}
break;
case 'n': /* -n number of packets with increasing noise. */
packet_count = atoi(optarg);
g_add_noise = 1;
break;
case 'N': /* -N number of packets. Don't add noise. */
packet_count = atoi(optarg);
g_add_noise = 0;
break;
case 'a': /* -a for amplitude */
amplitude = atoi(optarg);
text_color_set(DW_COLOR_INFO);
dw_printf ("Amplitude set to %d%%.\n", amplitude);
if (amplitude < 0 || amplitude > 200) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Amplitude must be in range of 0 to 200.\n");
exit (EXIT_FAILURE);
}
break;
case 'r': /* -r for audio sample Rate */
modem.adev[0].samples_per_sec = atoi(optarg);
text_color_set(DW_COLOR_INFO);
dw_printf ("Audio sample rate set to %d samples / second.\n", modem.adev[0].samples_per_sec);
if (modem.adev[0].samples_per_sec < MIN_SAMPLES_PER_SEC || modem.adev[0].samples_per_sec > MAX_SAMPLES_PER_SEC) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Use a more reasonable audio sample rate in range of %d - %d.\n",
MIN_SAMPLES_PER_SEC, MAX_SAMPLES_PER_SEC);
exit (EXIT_FAILURE);
}
break;
case 'z': /* -z leading zeros before frame flag */
leading_zeros = atoi(optarg);
text_color_set(DW_COLOR_INFO);
dw_printf ("Send %d zero bits before frame flag.\n", leading_zeros);
/* The demodulator needs a few for the clock recovery PLL. */
/* We don't want to be here all day either. */
/* We can't translate to time yet because the data bit rate */
/* could be changed later. */
if (leading_zeros < 8 || leading_zeros > 12000) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Use a more reasonable value.\n");
exit (EXIT_FAILURE);
}
break;
case '8': /* -8 for 8 bit samples */
modem.adev[0].bits_per_sample = 8;
text_color_set(DW_COLOR_INFO);
dw_printf("8 bits per audio sample rather than 16.\n");
break;
case '2': /* -2 for 2 channels of sound */
modem.adev[0].num_channels = 2;
modem.achan[1].medium = MEDIUM_RADIO;
text_color_set(DW_COLOR_INFO);
dw_printf("2 channels of sound rather than 1.\n");
break;
case 'o': /* -o for Output file */
strlcpy (output_file, optarg, sizeof(output_file));
text_color_set(DW_COLOR_INFO);
dw_printf ("Output file set to %s\n", output_file);
break;
case 'M': /* -M for morse code speed */
//TODO: document this.
// Why not base it on the destination field instead?
g_morse_wpm = atoi(optarg);
text_color_set(DW_COLOR_INFO);
dw_printf ("Morse code speed set to %d WPM.\n", g_morse_wpm);
if (g_morse_wpm < 5 || g_morse_wpm > 50) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Morse code speed must be in range of 5 to 50 WPM.\n");
exit (EXIT_FAILURE);
}
break;
case 'X':
modem.fx25_xmit_enable = atoi(optarg);
break;
case '?':
/* Unknown option message was already printed. */
usage (argv);
break;
default:
/* Should not be here. */
text_color_set(DW_COLOR_ERROR);
dw_printf("?? getopt returned character code 0%o ??\n", c);
usage (argv);
}
}
// These must be processed after -B option.
if (g_opt) { /* -g for g3ruh scrambling */
modem.achan[0].modem_type = MODEM_SCRAMBLE;
text_color_set(DW_COLOR_INFO);
dw_printf ("Using G3RUH mode regardless of bit rate.\n");
}
if (j_opt) { /* -j V.26 compatible with earlier direwolf. */
modem.achan[0].v26_alternative = V26_A;
modem.achan[0].modem_type = MODEM_QPSK;
modem.achan[0].mark_freq = 0;
modem.achan[0].space_freq = 0;
modem.achan[0].baud = 2400;
}
if (J_opt) { /* -J V.26 compatible with MFJ-2400. */
modem.achan[0].v26_alternative = V26_B;
modem.achan[0].modem_type = MODEM_QPSK;
modem.achan[0].mark_freq = 0;
modem.achan[0].space_freq = 0;
modem.achan[0].baud = 2400;
}
if (modem.achan[0].modem_type == MODEM_QPSK &&
modem.achan[0].v26_alternative == V26_UNSPECIFIED) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("ERROR: Either -j or -J must be specified when using 2400 bps QPSK.\n");
usage (argv);
exit (1);
}
/*
* Open the output file.
*/
if (strlen(output_file) == 0) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("ERROR: The -o output file option must be specified.\n");
usage (argv);
exit (1);
}
err = audio_file_open (output_file, &modem);
if (err < 0) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("ERROR - Can't open output file.\n");
exit (1);
}
gen_tone_init (&modem, amplitude/2, 1);
morse_init (&modem, amplitude/2);
dtmf_init (&modem, amplitude/2);
// We don't have -d or -q options here.
// Just use the default of minimal information.
fx25_init (1);
assert (modem.adev[0].bits_per_sample == 8 || modem.adev[0].bits_per_sample == 16);
assert (modem.adev[0].num_channels == 1 || modem.adev[0].num_channels == 2);
assert (modem.adev[0].samples_per_sec >= MIN_SAMPLES_PER_SEC && modem.adev[0].samples_per_sec <= MAX_SAMPLES_PER_SEC);
/*
* Get user packets(s) from file or stdin if specified.
* "-n" option is ignored in this case.
*/
if (optind < argc) {
char str[400];
// dw_printf("non-option ARGV-elements: ");
// while (optind < argc)
// dw_printf("%s ", argv[optind++]);
//dw_printf("\n");
if (optind < argc - 1) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Warning: File(s) beyond the first are ignored.\n");
}
if (strcmp(argv[optind], "-") == 0) {
text_color_set(DW_COLOR_INFO);
dw_printf ("Reading from stdin ...\n");
input_fp = stdin;
}
else {
input_fp = fopen(argv[optind], "r");
if (input_fp == NULL) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Can't open %s for read.\n", argv[optind]);
exit (EXIT_FAILURE);
}
text_color_set(DW_COLOR_INFO);
dw_printf ("Reading from %s ...\n", argv[optind]);
}
while (fgets (str, sizeof(str), input_fp) != NULL) {
text_color_set(DW_COLOR_REC);
dw_printf ("%s", str);
send_packet (str);
}
if (input_fp != stdin) {
fclose (input_fp);
}
audio_file_close();
return EXIT_SUCCESS;
}
/*
* Otherwise, use the built in packets.
*/
text_color_set(DW_COLOR_INFO);
dw_printf ("built in message...\n");
if (packet_count > 0) {
/*
* Generate packets with increasing noise level.
* Would probably be better to record real noise from a radio but
* for now just use a random number generator.
*/
for (i = 1; i <= packet_count; i++) {
char stemp[88];
if (modem.achan[0].baud < 600) {
/* e.g. 300 bps AFSK - About 2/3 should be decoded properly. */
g_noise_level = amplitude *.0048 * ((float)i / packet_count);
}
else if (modem.achan[0].baud < 1800) {
/* e.g. 1200 bps AFSK - About 2/3 should be decoded properly. */
g_noise_level = amplitude *.0023 * ((float)i / packet_count);
}
else if (modem.achan[0].baud < 3600) {
/* e.g. 2400 bps QPSK - T.B.D. */
g_noise_level = amplitude *.0015 * ((float)i / packet_count);
}
else if (modem.achan[0].baud < 7200) {
/* e.g. 4800 bps - T.B.D. */
g_noise_level = amplitude *.0007 * ((float)i / packet_count);
}
else {
/* e.g. 9600 */
g_noise_level = 0.33 * (amplitude / 200.0) * ((float)i / packet_count);
// temp test
//g_noise_level = 0.20 * (amplitude / 200.0) * ((float)i / packet_count);
}
snprintf (stemp, sizeof(stemp), "WB2OSZ-15>TEST:,The quick brown fox jumps over the lazy dog! %04d of %04d", i, packet_count);
send_packet (stemp);
}
}
else {
/*
* Builtin default 4 packets.
*/
send_packet ("WB2OSZ-15>TEST:,The quick brown fox jumps over the lazy dog! 1 of 4");
send_packet ("WB2OSZ-15>TEST:,The quick brown fox jumps over the lazy dog! 2 of 4");
send_packet ("WB2OSZ-15>TEST:,The quick brown fox jumps over the lazy dog! 3 of 4");
send_packet ("WB2OSZ-15>TEST:,The quick brown fox jumps over the lazy dog! 4 of 4");
}
audio_file_close();
return EXIT_SUCCESS;
}
static void usage (char **argv)
{
text_color_set(DW_COLOR_ERROR);
dw_printf ("\n");
dw_printf ("Usage: gen_packets [options] [file]\n");
dw_printf ("Options:\n");
dw_printf (" -a <number> Signal amplitude in range of 0 - 200%%. Default 50.\n");
dw_printf (" -b <number> Bits / second for data. Default is %d.\n", DEFAULT_BAUD);
dw_printf (" -B <number> Bits / second for data. Proper modem selected for 300, 1200, 2400, 4800, 9600.\n");
dw_printf (" -g Scrambled baseband rather than AFSK.\n");
dw_printf (" -j 2400 bps QPSK compatible with direwolf <= 1.5.\n");
dw_printf (" -J 2400 bps QPSK compatible with MFJ-2400.\n");
dw_printf (" -X n Generate FX.25 frames. Specify number of check bytes: 16, 32, or 64.\n");
dw_printf (" -m <number> Mark frequency. Default is %d.\n", DEFAULT_MARK_FREQ);
dw_printf (" -s <number> Space frequency. Default is %d.\n", DEFAULT_SPACE_FREQ);
dw_printf (" -r <number> Audio sample Rate. Default is %d.\n", DEFAULT_SAMPLES_PER_SEC);
dw_printf (" -n <number> Generate specified number of frames with increasing noise.\n");
dw_printf (" -o <file> Send output to .wav file.\n");
dw_printf (" -8 8 bit audio rather than 16.\n");
dw_printf (" -2 2 channels (stereo) audio rather than one channel.\n");
// dw_printf (" -z <number> Number of leading zero bits before frame.\n");
// dw_printf (" Default is 12 which is .01 seconds at 1200 bits/sec.\n");
dw_printf ("\n");
dw_printf ("An optional file may be specified to provide messages other than\n");
dw_printf ("the default built-in message. The format should correspond to\n");
dw_printf ("the standard packet monitoring representation such as,\n\n");
dw_printf (" WB2OSZ-1>APDW12,WIDE2-2:!4237.14NS07120.83W#\n");
dw_printf ("\n");
dw_printf ("Example: gen_packets -o x.wav \n");
dw_printf ("\n");
dw_printf (" With all defaults, a built-in test message is generated\n");
dw_printf (" with standard Bell 202 tones used for packet radio on ordinary\n");
dw_printf (" VHF FM transceivers.\n");
dw_printf ("\n");
dw_printf ("Example: gen_packets -o x.wav -g -b 9600\n");
dw_printf ("Shortcut: gen_packets -o x.wav -B 9600\n");
dw_printf ("\n");
dw_printf (" 9600 baud mode.\n");
dw_printf ("\n");
dw_printf ("Example: gen_packets -o x.wav -m 1600 -s 1800 -b 300\n");
dw_printf ("Shortcut: gen_packets -o x.wav -B 300\n");
dw_printf ("\n");
dw_printf (" 200 Hz shift, 300 baud, suitable for HF SSB transceiver.\n");
dw_printf ("\n");
dw_printf ("Example: echo -n \"WB2OSZ>WORLD:Hello, world!\" | gen_packets -a 25 -o x.wav -\n");
dw_printf ("\n");
dw_printf (" Read message from stdin and put quarter volume sound into the file x.wav.\n");
exit (EXIT_FAILURE);
}
/*------------------------------------------------------------------
*
* Name: audio_file_open
*
* Purpose: Open a .WAV format file for output.
*
* Inputs: fname - Name of .WAV file to create.
*
* pa - Address of structure of type audio_s.
*
* The fields that we care about are:
* num_channels
* samples_per_sec
* bits_per_sample
* If zero, reasonable defaults will be provided.
*
* Returns: 0 for success, -1 for failure.
*
*----------------------------------------------------------------*/
struct wav_header { /* .WAV file header. */
char riff[4]; /* "RIFF" */
int filesize; /* file length - 8 */
char wave[4]; /* "WAVE" */
char fmt[4]; /* "fmt " */
int fmtsize; /* 16. */
short wformattag; /* 1 for PCM. */
short nchannels; /* 1 for mono, 2 for stereo. */
int nsamplespersec; /* sampling freq, Hz. */
int navgbytespersec; /* = nblockalign * nsamplespersec. */
short nblockalign; /* = wbitspersample / 8 * nchannels. */
short wbitspersample; /* 16 or 8. */
char data[4]; /* "data" */
int datasize; /* number of bytes following. */
} ;
/* 8 bit samples are unsigned bytes */
/* in range of 0 .. 255. */
/* 16 bit samples are signed short */
/* in range of -32768 .. +32767. */
static FILE *out_fp = NULL;
static struct wav_header header;
static int byte_count; /* Number of data bytes written to file. */
/* Will be written to header when file is closed. */
static int audio_file_open (char *fname, struct audio_s *pa)
{
int n;
/*
* Fill in defaults for any missing values.
*/
if (pa -> adev[0].num_channels == 0)
pa -> adev[0].num_channels = DEFAULT_NUM_CHANNELS;
if (pa -> adev[0].samples_per_sec == 0)
pa -> adev[0].samples_per_sec = DEFAULT_SAMPLES_PER_SEC;
if (pa -> adev[0].bits_per_sample == 0)
pa -> adev[0].bits_per_sample = DEFAULT_BITS_PER_SAMPLE;
/*
* Write the file header. Don't know length yet.
*/
out_fp = fopen (fname, "wb");
if (out_fp == NULL) {
text_color_set(DW_COLOR_ERROR); dw_printf ("Couldn't open file for write: %s\n", fname);
perror ("");
return (-1);
}
memset (&header, 0, sizeof(header));
memcpy (header.riff, "RIFF", (size_t)4);
header.filesize = 0;
memcpy (header.wave, "WAVE", (size_t)4);
memcpy (header.fmt, "fmt ", (size_t)4);
header.fmtsize = 16; // Always 16.
header.wformattag = 1; // 1 for PCM.
header.nchannels = pa -> adev[0].num_channels;
header.nsamplespersec = pa -> adev[0].samples_per_sec;
header.wbitspersample = pa -> adev[0].bits_per_sample;
header.nblockalign = header.wbitspersample / 8 * header.nchannels;
header.navgbytespersec = header.nblockalign * header.nsamplespersec;
memcpy (header.data, "data", (size_t)4);
header.datasize = 0;
assert (header.nchannels == 1 || header.nchannels == 2);
n = fwrite (&header, sizeof(header), (size_t)1, out_fp);
if (n != 1) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Couldn't write header to: %s\n", fname);
perror ("");
fclose (out_fp);
out_fp = NULL;
return (-1);
}
/*
* Number of bytes written will be filled in later.
*/
byte_count = 0;
return (0);
} /* end audio_open */
/*------------------------------------------------------------------
*
* Name: audio_put
*
* Purpose: Send one byte to the audio output file.
*
* Inputs: c - One byte in range of 0 - 255.
*
* Returns: Normally non-negative.
* -1 for any type of error.
*
* Description: The caller must deal with the details of mono/stereo
* and number of bytes per sample.
*
*----------------------------------------------------------------*/
int audio_put (int a, int c)
{
static short sample16;
int s;
if (g_add_noise) {
if ((byte_count & 1) == 0) {
sample16 = c & 0xff; /* save lower byte. */
byte_count++;
return c;
}
else {
float r;
sample16 |= (c << 8) & 0xff00; /* insert upper byte. */
byte_count++;
s = sample16; // sign extend.
/* Add random noise to the signal. */
/* r should be in range of -1 .. +1. */
/* Use own function instead of rand() from the C library. */
/* Windows and Linux have different results, messing up my self test procedure. */
/* No idea what Mac OSX and BSD might do. */
r = (my_rand() - MY_RAND_MAX/2.0) / (MY_RAND_MAX/2.0);
s += 5 * r * g_noise_level * 32767;
if (s > 32767) s = 32767;
if (s < -32767) s = -32767;
putc(s & 0xff, out_fp);
return (putc((s >> 8) & 0xff, out_fp));
}
}
else {
byte_count++;
return (putc(c, out_fp));
}
} /* end audio_put */
int audio_flush (int a)
{
return 0;
}
/*------------------------------------------------------------------
*
* Name: audio_file_close
*
* Purpose: Close the audio output file.
*
* Returns: Normally non-negative.
* -1 for any type of error.
*
*
* Description: Must go back to beginning of file and fill in the
* size of the data.
*
*----------------------------------------------------------------*/
static int audio_file_close (void)
{
int n;
//text_color_set(DW_COLOR_DEBUG);
//dw_printf ("audio_close()\n");
/*
* Go back and fix up lengths in header.
*/
header.filesize = byte_count + sizeof(header) - 8;
header.datasize = byte_count;
if (out_fp == NULL) {
return (-1);
}
fflush (out_fp);
fseek (out_fp, 0L, SEEK_SET);
n = fwrite (&header, sizeof(header), (size_t)1, out_fp);
if (n != 1) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Couldn't write header to audio file.\n");
perror (""); // TODO: remove perror.
fclose (out_fp);
out_fp = NULL;
return (-1);
}
fclose (out_fp);
out_fp = NULL;
return (0);
} /* end audio_close */
// To keep dtmf.c happy.
#include "hdlc_rec.h" // for dcd_change
void dcd_change (int chan, int subchan, int slice, int state)
{
}