blob: 8d83f0d0abb988ffa7bd30a9205bed1a4d7cbc0a (
plain)
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
|
/* -*- c++ -*- */
/*
* Copyright 2015 Free Software Foundation, Inc.
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "atsc_randomizer_impl.h"
#include "gnuradio/dtv/atsc_consts.h"
#include <gnuradio/io_signature.h>
namespace gr {
namespace dtv {
atsc_randomizer::sptr atsc_randomizer::make()
{
return gnuradio::get_initial_sptr(new atsc_randomizer_impl());
}
atsc_randomizer_impl::atsc_randomizer_impl()
: gr::sync_block("atsc_randomizer",
gr::io_signature::make(1, 1, sizeof(atsc_mpeg_packet)),
gr::io_signature::make(1, 1, sizeof(atsc_mpeg_packet_no_sync)))
{
reset();
}
atsc_randomizer_impl::~atsc_randomizer_impl() {}
void atsc_randomizer_impl::reset()
{
d_rand.reset();
d_field2 = false;
d_segno = 0;
}
int atsc_randomizer_impl::work(int noutput_items,
gr_vector_const_void_star& input_items,
gr_vector_void_star& output_items)
{
const atsc_mpeg_packet* in = (const atsc_mpeg_packet*)input_items[0];
atsc_mpeg_packet_no_sync* out = (atsc_mpeg_packet_no_sync*)output_items[0];
for (int i = 0; i < noutput_items; i++) {
// sanity check incoming data.
assert((in[i].data[0] == MPEG_SYNC_BYTE));
assert((in[i].data[1] & MPEG_TRANSPORT_ERROR_BIT) == 0);
// initialize plinfo for downstream
//
// We do this here because the randomizer is effectively
// the head of the tx processing chain
//
out[i].pli.set_regular_seg(d_field2, d_segno);
d_segno++;
if (d_segno == 312) {
d_segno = 0;
d_field2 = !d_field2;
}
if (out[i].pli.first_regular_seg_p()) {
d_rand.reset();
}
d_rand.randomize(out[i], in[i]);
}
// Tell runtime system how many output items we produced.
return noutput_items;
}
} /* namespace dtv */
} /* namespace gr */
|
