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61 lines
1.8 KiB
C++
61 lines
1.8 KiB
C++
/* findsync1.cc: ROM loader state searching for the sync1 pulse following
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the initial pilot pulses
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Copyright (c) 2008 Fredrick Meunier
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$Id$
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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Author contact information:
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E-mail: fredm@spamcop.net
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*/
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#include <iostream>
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#include "findpilot.h"
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#include "findsync1.h"
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#include "getsync2.h"
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findsync1* findsync1::unique_instance;
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findsync1*
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findsync1::instance()
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{
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if( unique_instance == 0 ) {
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unique_instance = new findsync1();
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}
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return unique_instance;
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}
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void
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findsync1::handle_pulse( romloader* loader, double tstates,
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unsigned int pulse_length )
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{
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// look for pulse no longer than SYNC_TOTAL_MAX, but less than SYNC1_MAX
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if( pulse_length > loader->SYNC_TOTAL_MAX ) {
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// go back to looking for pilot tones
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loader->reset_pilot_count();
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loader->change_state( findpilot::instance() );
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} else if ( pulse_length < loader->SYNC1_MAX ) {
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// get sync2
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getsync2::instance()->set_first_pulse( tstates, pulse_length );
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loader->change_state( getsync2::instance() );
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} else {
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loader->add_pilot_pulse( tstates, pulse_length );
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}
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}
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