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◆ main openmsx / src / cassette / CassettePort.hh
3.2 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
e8555c89 Andy McCall 1 
#ifndef CASSETTEPORT_HH
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#define CASSETTEPORT_HH
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#include "CassettePlayerCommand.hh"
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#include "Connector.hh"
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#include "serialize_meta.hh"
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#include "components.hh"
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namespace openmsx {
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class HardwareConfig;
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class MSXMotherBoard;
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class CassetteDevice;
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class CassettePlayer;
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#if COMPONENT_LASERDISC
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class LaserdiscPlayer;
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#endif
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class CassettePortInterface
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{
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public:
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	virtual ~CassettePortInterface() = default;
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	/**
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	* Sets the cassette motor relay
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	*  false = off   true = on
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	*/
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	virtual void setMotor(bool status, EmuTime time) = 0;
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	/**
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	* Writes one bit to the cassette port.
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	* From the RedBook:
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	*   The CasOut bit is filtered and attenuated before being
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	*   taken to the cassette DIN socket as the MIC signal. All
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	*   cassette tone generation is performed in software.
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	*/
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	virtual void cassetteOut(bool output, EmuTime time) = 0;
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	/**
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	 * last bit written to CasOut.
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	 * for use in Pluggable::plugHelper()
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	 */
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	[[nodiscard]] virtual bool lastOut() const = 0;
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	/**
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	* Reads one bit from the cassette port.
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	* From the RedBook:
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	*   The cassette input is used to read the signal from the
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	*   cassette EAR output. This is passed through a comparator
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	*   to clean the edges and to convert to digital levels,
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	*   but is otherwise unprocessed.
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	*/
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	virtual bool cassetteIn(EmuTime time) = 0;
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#if COMPONENT_LASERDISC
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	/**
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	* Set the Laserdisc Player; when the motor control is off, sound
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	* is read from the laserdisc.
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	*/
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	virtual void setLaserdiscPlayer(LaserdiscPlayer *laserdisc) = 0;
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#endif
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	/**
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	* Get the cassette player (if available)
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	*/
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	virtual CassettePlayer* getCassettePlayer() = 0;
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};
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class CassettePort final : public CassettePortInterface, public Connector
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{
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public:
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	explicit CassettePort(HardwareConfig& hwConf);
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	~CassettePort() override;
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	void setMotor(bool status, EmuTime time) override;
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	void cassetteOut(bool output, EmuTime time) override;
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	bool cassetteIn(EmuTime time) override;
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#if COMPONENT_LASERDISC
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	void setLaserdiscPlayer(LaserdiscPlayer* laserdisc) override;
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#endif
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	[[nodiscard]] bool lastOut() const override;
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	CassettePlayer* getCassettePlayer() override { return cassettePlayer; }
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	// Connector
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	[[nodiscard]] zstring_view getDescription() const override;
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	[[nodiscard]] zstring_view getClass() const override;
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	template<typename Archive>
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	void serialize(Archive& ar, unsigned version);
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private:
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	[[nodiscard]] CassetteDevice& getPluggedCasDev() const;
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	MSXMotherBoard& motherBoard;
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#if COMPONENT_LASERDISC
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	LaserdiscPlayer* laserdiscPlayer = nullptr;
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#endif
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	CassettePlayer* cassettePlayer;
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	bool lastOutput = false;
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	bool motorControl = false;
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};
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SERIALIZE_CLASS_VERSION(CassettePort, 2);
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class DummyCassettePort final : public CassettePortInterface
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{
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public:
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	explicit DummyCassettePort(MSXMotherBoard& motherBoard);
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	void setMotor(bool status, EmuTime time) override;
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	void cassetteOut(bool output, EmuTime time) override;
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	bool cassetteIn(EmuTime time) override;
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#if COMPONENT_LASERDISC
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	void setLaserdiscPlayer(LaserdiscPlayer *laserdisc) override;
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#endif
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	[[nodiscard]] bool lastOut() const override;
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	CassettePlayer* getCassettePlayer() override { return nullptr; }
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private:
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	CassettePlayerCommand cassettePlayerCommand;
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};
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} // namespace openmsx
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#endif