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., 675 Mass Ave, Cambridge, MA 02139, USA.
33 FGBeacon::~FGBeacon() {
37 // allocate and initialize sound samples
38 bool FGBeacon::init() {
43 unsigned char inner_buf[ INNER_SIZE ] ;
44 unsigned char middle_buf[ MIDDLE_SIZE ] ;
45 unsigned char outer_buf[ OUTER_SIZE ] ;
47 // Make inner marker beacon sound
48 len= (int)(INNER_DIT_LEN / 2.0 );
49 unsigned char inner_dit[INNER_DIT_LEN];
50 make_tone( inner_dit, INNER_FREQ, len, INNER_DIT_LEN,
54 for ( i = 0; i < 6; ++i ) {
55 memcpy( ptr, inner_dit, INNER_DIT_LEN );
59 inner = new SGSoundSample( inner_buf, INNER_SIZE, BYTES_PER_SECOND );
60 inner->set_reference_dist( 10.0 );
61 inner->set_max_dist( 20.0 );
63 // Make middle marker beacon sound
64 len= (int)(MIDDLE_DIT_LEN / 2.0 );
65 unsigned char middle_dit[MIDDLE_DIT_LEN];
66 make_tone( middle_dit, MIDDLE_FREQ, len, MIDDLE_DIT_LEN,
69 len= (int)(MIDDLE_DAH_LEN * 3 / 4.0 );
70 unsigned char middle_dah[MIDDLE_DAH_LEN];
71 make_tone( middle_dah, MIDDLE_FREQ, len, MIDDLE_DAH_LEN,
75 memcpy( ptr, middle_dit, MIDDLE_DIT_LEN );
76 ptr += MIDDLE_DIT_LEN;
77 memcpy( ptr, middle_dah, MIDDLE_DAH_LEN );
79 middle = new SGSoundSample( middle_buf, MIDDLE_SIZE, BYTES_PER_SECOND );
80 middle->set_reference_dist( 10.0 );
81 middle->set_max_dist( 20.0 );
83 // Make outer marker beacon sound
84 len= (int)(OUTER_DAH_LEN * 3.0 / 4.0 );
85 unsigned char outer_dah[OUTER_DAH_LEN];
86 make_tone( outer_dah, OUTER_FREQ, len, OUTER_DAH_LEN,
90 memcpy( ptr, outer_dah, OUTER_DAH_LEN );
92 memcpy( ptr, outer_dah, OUTER_DAH_LEN );
94 outer = new SGSoundSample( outer_buf, OUTER_SIZE, BYTES_PER_SECOND);
95 outer->set_reference_dist( 10.0 );
96 outer->set_max_dist( 20.0 );