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◆ main openmsx / src / Autofire.cc
2.1 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
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#include "Autofire.hh"
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#include "MSXMotherBoard.hh"
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#include "Scheduler.hh"
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#include "StateChange.hh"
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#include "StateChangeDistributor.hh"
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#include <algorithm>
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#include <cassert>
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namespace openmsx {
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Autofire::Autofire(MSXMotherBoard& motherBoard,
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                   unsigned newMinInts, unsigned newMaxInts, AutofireID id_)
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	: scheduler(motherBoard.getScheduler())
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	, stateChangeDistributor(motherBoard.getStateChangeDistributor())
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	, min_ints(std::max(newMinInts, 1u))
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	, max_ints(std::max(newMaxInts, min_ints + 1))
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	, speedSetting(motherBoard.getCommandController(), nameForId(id_),
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		"controls autofire speed (0 = disabled)", 0, 0, 100)
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	, clock(scheduler.getCurrentTime())
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	, id(id_)
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{
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	setClock(speedSetting.getInt());
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	stateChangeDistributor.registerListener(*this);
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	speedSetting.attach(*this);
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}
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Autofire::~Autofire()
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{
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	speedSetting.detach(*this);
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	stateChangeDistributor.unregisterListener(*this);
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}
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void Autofire::setSpeed(EmuTime time)
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{
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	stateChangeDistributor.distributeNew<AutofireStateChange>(
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		time, id, speedSetting.getInt());
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}
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void Autofire::setClock(int speed)
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{
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	if (speed) {
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		clock.setFreq(
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		    (2 * 50 * 60) / (max_ints - (speed * (max_ints - min_ints)) / 100));
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	} else {
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		clock.setPeriod(EmuDuration::zero()); // special value: disabled
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	}
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}
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void Autofire::update(const Setting& setting) noexcept
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{
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	(void)setting;
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	assert(&setting == &speedSetting);
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	setSpeed(scheduler.getCurrentTime());
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}
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void Autofire::signalStateChange(const StateChange& event)
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{
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	const auto* as = std::get_if<AutofireStateChange>(&event);
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	if (!as) return;
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	if (as->getId() != id) return;
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	setClock(as->getValue());
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}
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void Autofire::stopReplay(EmuTime time) noexcept
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{
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	setSpeed(time); // re-sync with current value of the setting
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}
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bool Autofire::getSignal(EmuTime time) const
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{
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	return (clock.getPeriod() == EmuDuration::zero())
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		? false // special value: disabled
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		: (clock.getTicksTill(time) & 1);
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}
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template<typename Archive>
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void Autofire::serialize(Archive& ar, unsigned /*version*/)
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{
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	ar.serialize("clock", clock);
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}
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INSTANTIATE_SERIALIZE_METHODS(Autofire)
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} // namespace openmsx