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124 lines
3.5 KiB
C++
124 lines
3.5 KiB
C++
/* romloader.h: Class attempting to reproduce the Spectrum standard ROM loader
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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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#ifndef ROMLOADER_H
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#define ROMLOADER_H
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#include <vector>
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#include <libspectrum.h>
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#include "converter/romloaderstate.h"
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#include "importer/soundfile.h"
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typedef std::vector<libspectrum_byte> byte_list;
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class rom_block {
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public:
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double tstate_start;
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double tstate_end;
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size_t pilot_count;
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unsigned int pilot_length;
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unsigned int sync1_length;
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unsigned int sync2_length;
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unsigned int zero_length;
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unsigned int one_length;
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unsigned int pause_length;
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byte_list data;
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};
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typedef std::vector<rom_block> rom_block_list;
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class romloader {
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public:
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romloader( double source_machine_hz, bool show_stats );
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virtual ~romloader();
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void handle_pulse( double tstates, unsigned int pulse_length );
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void add_pilot_pulse( double tstates, unsigned int pulse_length );
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size_t get_block_count();
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void get_block( libspectrum_tape *tape, size_t number,
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bool standard_timings );
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double get_block_start( size_t number );
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double get_block_end( size_t number );
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size_t get_pilot_count();
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void reset_pilot_count();
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void add_zero_pulse( unsigned int pulse_length );
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void add_one_pulse( unsigned int pulse_length );
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void set_sync1_pulse( unsigned int pulse_length );
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void set_sync2_pulse( unsigned int pulse_length );
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void add_bit( libspectrum_byte bit );
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int get_bits_through_byte();
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void end_block( double end_marker, double end_tstates );
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bool check_checksum();
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void stats( std::string type, pulse_list& data, int standardPulse,
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unsigned int& average );
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void change_state( romloaderstate* new_state );
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static const unsigned int PILOT_LENGTH = 2168;
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static const unsigned int SYNC1 = 667;
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static const unsigned int SYNC2 = 735;
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static const unsigned int ZERO = 855;
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static const unsigned int ONE = 1710;
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static const unsigned int ROM_END_MARKER = 945;
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static const unsigned int PILOT_MAX = 3000;
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static const unsigned int SYNC1_MAX = 1100;
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static const unsigned int SYNC_TOTAL_MAX = 3594;
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static const unsigned int ZERO_THRESHOLD = 2400;
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static const unsigned int DATA_TOTAL_MAX = 5044;
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static const unsigned int MIN_PILOT_COUNT = 256;
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private:
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std::string uchar2hex(libspectrum_byte inbyte);
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romloaderstate* m_rom_loader_state;
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bool show_stats;
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double source_machine_hz;
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double first_pilot_tstates;
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pulse_list pilot_pulses;
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pulse_list zero_pulses;
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pulse_list one_pulses;
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byte_list data;
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libspectrum_byte current_byte;
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int num_bits;
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unsigned int sync1_length;
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unsigned int sync2_length;
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rom_block_list blocks;
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};
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#endif /* #define ROMLOADER_H */
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