e9a9f8c96d
Stop using SG_GENERAL and SG_ALL everywhere. Using different classes makes switching the classes really useful...
106 lines
3.4 KiB
C++
106 lines
3.4 KiB
C++
// beacon.cxx -- Morse code generation class
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//
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// Written by Curtis Olson, started March 2001.
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//
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// Copyright (C) 2001 Curtis L. Olson - http://www.flightgear.org/~curt
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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// $Id$
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#include <stdlib.h>
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#include <cstring>
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#include "beacon.hxx"
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#include <simgear/structure/exception.hxx>
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// constructor
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FGBeacon::FGBeacon()
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{
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}
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// destructor
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FGBeacon::~FGBeacon() {
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}
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// allocate and initialize sound samples
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bool FGBeacon::init() {
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unsigned char *ptr;
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size_t i, len;
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const unsigned char* inner_buf = (const unsigned char*)malloc( INNER_SIZE );
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const unsigned char* middle_buf = (const unsigned char*)malloc(MIDDLE_SIZE);
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const unsigned char* outer_buf = (const unsigned char*)malloc( OUTER_SIZE );
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// Make inner marker beacon sound
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len= (int)(INNER_DIT_LEN / 2.0 );
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unsigned char inner_dit[INNER_DIT_LEN];
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make_tone( inner_dit, INNER_FREQ, len, INNER_DIT_LEN,
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TRANSITION_BYTES );
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ptr = (unsigned char*)inner_buf;
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for ( i = 0; i < 6; ++i ) {
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memcpy( ptr, inner_dit, INNER_DIT_LEN );
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ptr += INNER_DIT_LEN;
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}
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try {
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inner = new SGSoundSample( &inner_buf, INNER_SIZE, BYTES_PER_SECOND );
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inner->set_reference_dist( 10.0 );
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inner->set_max_dist( 20.0 );
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// Make middle marker beacon sound
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len= (int)(MIDDLE_DIT_LEN / 2.0 );
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unsigned char middle_dit[MIDDLE_DIT_LEN];
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make_tone( middle_dit, MIDDLE_FREQ, len, MIDDLE_DIT_LEN,
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TRANSITION_BYTES );
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len= (int)(MIDDLE_DAH_LEN * 3 / 4.0 );
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unsigned char middle_dah[MIDDLE_DAH_LEN];
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make_tone( middle_dah, MIDDLE_FREQ, len, MIDDLE_DAH_LEN,
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TRANSITION_BYTES );
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ptr = (unsigned char*)middle_buf;
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memcpy( ptr, middle_dit, MIDDLE_DIT_LEN );
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ptr += MIDDLE_DIT_LEN;
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memcpy( ptr, middle_dah, MIDDLE_DAH_LEN );
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middle = new SGSoundSample( &middle_buf, MIDDLE_SIZE, BYTES_PER_SECOND);
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middle->set_reference_dist( 10.0 );
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middle->set_max_dist( 20.0 );
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// Make outer marker beacon sound
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len= (int)(OUTER_DAH_LEN * 3.0 / 4.0 );
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unsigned char outer_dah[OUTER_DAH_LEN];
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make_tone( outer_dah, OUTER_FREQ, len, OUTER_DAH_LEN,
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TRANSITION_BYTES );
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ptr = (unsigned char*)outer_buf;
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memcpy( ptr, outer_dah, OUTER_DAH_LEN );
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ptr += OUTER_DAH_LEN;
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memcpy( ptr, outer_dah, OUTER_DAH_LEN );
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outer = new SGSoundSample( &outer_buf, OUTER_SIZE, BYTES_PER_SECOND );
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outer->set_reference_dist( 10.0 );
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outer->set_max_dist( 20.0 );
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} catch ( sg_io_exception &e ) {
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SG_LOG(SG_SOUND, SG_ALERT, e.getFormattedMessage());
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}
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return true;
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}
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