1 // beacon.cxx -- Morse code generation class
3 // Written by Curtis Olson, started March 2001.
5 // Copyright (C) 2001 Curtis L. Olson - http://www.flightgear.org/~curt
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License as
9 // published by the Free Software Foundation; either version 2 of the
10 // License, or (at your option) any later version.
12 // This program is distributed in the hope that it will be useful, but
13 // WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 // General Public License for more details.
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, write to the Free Software
19 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
28 #include <simgear/structure/exception.hxx>
36 FGBeacon::~FGBeacon() {
40 // allocate and initialize sound samples
41 bool FGBeacon::init() {
45 const unsigned char* inner_buf = (const unsigned char*)malloc( INNER_SIZE );
46 const unsigned char* middle_buf = (const unsigned char*)malloc(MIDDLE_SIZE);
47 const unsigned char* outer_buf = (const unsigned char*)malloc( OUTER_SIZE );
49 // Make inner marker beacon sound
50 len= (int)(INNER_DIT_LEN / 2.0 );
51 unsigned char inner_dit[INNER_DIT_LEN];
52 make_tone( inner_dit, INNER_FREQ, len, INNER_DIT_LEN,
55 ptr = (unsigned char*)inner_buf;
56 for ( i = 0; i < 6; ++i ) {
57 memcpy( ptr, inner_dit, INNER_DIT_LEN );
62 inner = new SGSoundSample( &inner_buf, INNER_SIZE, BYTES_PER_SECOND );
63 inner->set_reference_dist( 10.0 );
64 inner->set_max_dist( 20.0 );
66 // Make middle marker beacon sound
67 len= (int)(MIDDLE_DIT_LEN / 2.0 );
68 unsigned char middle_dit[MIDDLE_DIT_LEN];
69 make_tone( middle_dit, MIDDLE_FREQ, len, MIDDLE_DIT_LEN,
72 len= (int)(MIDDLE_DAH_LEN * 3 / 4.0 );
73 unsigned char middle_dah[MIDDLE_DAH_LEN];
74 make_tone( middle_dah, MIDDLE_FREQ, len, MIDDLE_DAH_LEN,
77 ptr = (unsigned char*)middle_buf;
78 memcpy( ptr, middle_dit, MIDDLE_DIT_LEN );
79 ptr += MIDDLE_DIT_LEN;
80 memcpy( ptr, middle_dah, MIDDLE_DAH_LEN );
82 middle = new SGSoundSample( &middle_buf, MIDDLE_SIZE, BYTES_PER_SECOND);
83 middle->set_reference_dist( 10.0 );
84 middle->set_max_dist( 20.0 );
86 // Make outer marker beacon sound
87 len= (int)(OUTER_DAH_LEN * 3.0 / 4.0 );
88 unsigned char outer_dah[OUTER_DAH_LEN];
89 make_tone( outer_dah, OUTER_FREQ, len, OUTER_DAH_LEN,
92 ptr = (unsigned char*)outer_buf;
93 memcpy( ptr, outer_dah, OUTER_DAH_LEN );
95 memcpy( ptr, outer_dah, OUTER_DAH_LEN );
97 outer = new SGSoundSample( &outer_buf, OUTER_SIZE, BYTES_PER_SECOND );
98 outer->set_reference_dist( 10.0 );
99 outer->set_max_dist( 20.0 );
100 } catch ( sg_io_exception &e ) {
101 SG_LOG(SG_GENERAL, SG_ALERT, e.getFormattedMessage());