CLK/Storage/Tape/Tape.cpp

//
//  Tape.cpp
//  Clock Signal
//
//  Created by Thomas Harte on 18/01/2016.
//  Copyright © 2016 Thomas Harte. All rights reserved.
//

#include "Tape.hpp"
#include "../../NumberTheory/Factors.hpp"

using namespace Storage::Tape;

#pragma mark - Lifecycle

TapePlayer::TapePlayer(unsigned int input_clock_rate) :
	TimedEventLoop(input_clock_rate)
{}

#pragma mark - Seeking

void Storage::Tape::Tape::seek(Time &seek_time)
{
	_current_time.set_zero();
	_next_time.set_zero();
	while(_next_time < seek_time) get_next_pulse();
}

void Storage::Tape::Tape::reset()
{
	_current_time.set_zero();
	_next_time.set_zero();
	virtual_reset();
}

Tape::Pulse Tape::get_next_pulse()
{
	Tape::Pulse pulse = virtual_get_next_pulse();
	_current_time = _next_time;
	_next_time += pulse.length;
	return pulse;
}

#pragma mark - Player

void TapePlayer::set_tape(std::shared_ptr<Storage::Tape::Tape> tape)
{
	_tape = tape;
	reset_timer();
	get_next_pulse();
}

std::shared_ptr<Storage::Tape::Tape> TapePlayer::get_tape()
{
	return _tape;
}

bool TapePlayer::has_tape()
{
	return (bool)_tape;
}

void TapePlayer::get_next_pulse()
{
	// get the new pulse
	if(_tape)
		_current_pulse = _tape->get_next_pulse();
	else
	{
		_current_pulse.length.length = 1;
		_current_pulse.length.clock_rate = 1;
		_current_pulse.type = Tape::Pulse::Zero;
	}

	set_next_event_time_interval(_current_pulse.length);
}

void TapePlayer::run_for_cycles(int number_of_cycles)
{
	if(has_tape())
	{
		TimedEventLoop::run_for_cycles(number_of_cycles);
	}
}

void TapePlayer::run_for_input_pulse()
{
	jump_to_next_event();
}

void TapePlayer::process_next_event()
{
	process_input_pulse(_current_pulse);
	get_next_pulse();
}

#pragma mark - Binary Player

BinaryTapePlayer::BinaryTapePlayer(unsigned int input_clock_rate) :
	TapePlayer(input_clock_rate), _motor_is_running(false)
{}

void BinaryTapePlayer::set_motor_control(bool enabled)
{
	_motor_is_running = enabled;
}

void BinaryTapePlayer::set_tape_output(bool set)
{
	// TODO
}

bool BinaryTapePlayer::get_input()
{
	return _input_level;
}

void BinaryTapePlayer::run_for_cycles(int number_of_cycles)
{
	if(_motor_is_running) TapePlayer::run_for_cycles(number_of_cycles);
}

void BinaryTapePlayer::set_delegate(Delegate *delegate)
{
	_delegate = delegate;
}

void BinaryTapePlayer::process_input_pulse(Storage::Tape::Tape::Pulse pulse)
{
	bool new_input_level = pulse.type == Tape::Pulse::Low;
	if(_input_level != new_input_level)
	{
		_input_level = new_input_level;
		if(_delegate) _delegate->tape_did_change_input(this);
	}
}