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
|
/* -*- c++ -*- */
/*
* Copyright 2016-2018 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio 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 3, or (at your option)
* any later version.
*
* GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "freedv_rx_ss_impl.h"
#include <gnuradio/io_signature.h>
#include <stdexcept>
#include <assert.h>
extern "C" {
void put_next_rx_char(void *callback_state, char c) {
struct freedv_rx_callback_state* pstate;
pstate = (struct freedv_rx_callback_state*) callback_state;
if (pstate->ftxt != NULL) {
//fprintf(pstate->ftxt, "%c\n", c);
}
return;
}
}
namespace gr {
namespace vocoder {
freedv_rx_ss::sptr
freedv_rx_ss::make(int mode, float squelch_thresh, int interleave_frames)
{
return gnuradio::get_initial_sptr
(new freedv_rx_ss_impl(mode, squelch_thresh, interleave_frames));
}
freedv_rx_ss_impl::freedv_rx_ss_impl (int mode, float squelch_thresh, int interleave_frames)
: gr::block("vocoder_freedv_rx_ss",
io_signature::make(1, 1, sizeof(short)),
io_signature::make(1, 1, sizeof(short))),
d_mode(mode), d_squelch_thresh(squelch_thresh), d_interleave_frames(interleave_frames)
{
#ifdef FREEDV_MODE_700D
if (mode == FREEDV_MODE_700D) {
d_adv.interleave_frames = interleave_frames;
if((d_freedv = freedv_open_advanced(mode, &d_adv)) ==NULL)
throw std::runtime_error("freedv_tx_ss_impl: freedv_open_advanced failed");
} else {
if((d_freedv = freedv_open(mode)) == NULL)
throw std::runtime_error("freedv_tx_ss_impl: freedv_open failed");
}
#else
if((d_freedv = freedv_open(mode)) == NULL)
throw std::runtime_error("freedv_rx_ss_impl: freedv_open failed");
#endif
freedv_set_snr_squelch_thresh(d_freedv, d_squelch_thresh);
freedv_set_squelch_en(d_freedv, 0);
freedv_set_callback_txt(d_freedv, put_next_rx_char, NULL, (void *) &d_cb_state);
d_speech_samples = freedv_get_n_speech_samples(d_freedv);
d_max_modem_samples = freedv_get_n_max_modem_samples(d_freedv);
d_nin = freedv_nin(d_freedv);
set_output_multiple(d_max_modem_samples);
}
freedv_rx_ss_impl::~freedv_rx_ss_impl()
{
int total_bits;
int total_bit_errors;
if (freedv_get_test_frames(d_freedv)) {
total_bits = freedv_get_total_bits(d_freedv);
total_bit_errors = freedv_get_total_bit_errors(d_freedv);
fprintf(stderr, "bits: %d errors: %d BER: %3.2f\n", total_bits, total_bit_errors, (1.0*total_bit_errors)/total_bits);
}
freedv_close(d_freedv);
}
void
freedv_rx_ss_impl::forecast(int noutput_items,
gr_vector_int &ninput_items_required)
{
unsigned ninputs = ninput_items_required.size();
for(unsigned i = 0; i < ninputs; i++)
ninput_items_required[i] = std::max(d_nin, noutput_items);
}
int
freedv_rx_ss_impl::general_work(int noutput_items,
gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
short *in = (short *) input_items[0];
short *out = (short *) output_items[0];
int in_offset = 0, out_offset = 0;
while ((noutput_items - out_offset) >= d_max_modem_samples
&& (ninput_items[0] - in_offset) >= d_nin) {
d_nout = freedv_rx(d_freedv, out + out_offset, in + in_offset);
out_offset += d_nout;
in_offset += d_nin;
d_nin = freedv_nin(d_freedv);
}
freedv_get_modem_stats(d_freedv, &d_sync, &d_snr_est);
freedv_get_modem_extended_stats(d_freedv, &d_stats);
d_total_bit_errors = freedv_get_total_bit_errors(d_freedv);
consume_each(in_offset);
return out_offset;
}
void put_next_rx_proto(void *callback_state,char *proto_bits) {
return;
}
void datarx(void *callback_state, unsigned char *packet, size_t size) {
return;
}
void datatx(void *callback_state, unsigned char *packet, size_t *size) {
return;
}
void freedv_rx_ss_impl::set_squelch_thresh(float squelch_thresh)
{
gr::thread::scoped_lock l(d_setlock);
d_squelch_thresh = squelch_thresh;
freedv_set_snr_squelch_thresh(d_freedv, d_squelch_thresh);
}
void freedv_rx_ss_impl::set_squelch_en(bool squelch_enabled)
{
gr::thread::scoped_lock l(d_setlock);
d_squelch_en = squelch_enabled;
if (squelch_enabled)
freedv_set_squelch_en(d_freedv, 1);
else
freedv_set_squelch_en(d_freedv, 0);
}
float freedv_rx_ss_impl::squelch_thresh() {
return(d_squelch_thresh);
}
} /* namespace vocoder */
} /* namespace gr */
|
