OPL::NullOPL Class Reference

#include <fmopl.h>

Inheritance diagram for OPL::NullOPL:

Public Member Functions
bool	init () override
void	reset () override
void	write (int a, int v) override
void	writeReg (int r, int v) override
Public Member Functions inherited from OPL::OPL
void	start (TimerCallback *callback)
Public Member Functions inherited from Audio::Chip
void	start (TimerCallback *callback, int timerFrequency)
void	stop ()
Public Member Functions inherited from Audio::RealChip
void	setCallbackFrequency (int timerFrequency)

Additional Inherited Members
Public Types inherited from OPL::OPL
enum	{ kDefaultCallbackFrequency = 250 }
Public Types inherited from Audio::Chip
typedef Common::Functor0< void >	TimerCallback
Protected Member Functions inherited from OPL::OPL
void	initDualOpl2OnOpl3 (Config::OplType oplType)
bool	emulateDualOpl2OnOpl3 (int r, int v, Config::OplType oplType)
Protected Member Functions inherited from Audio::RealChip
void	startCallbacks (int timerFrequency)
void	stopCallbacks ()
virtual void	onTimer ()
Protected Attributes inherited from OPL::OPL
bool	_rhythmMode
int	_connectionFeedbackValues [3]
Protected Attributes inherited from Audio::Chip
Common::ScopedPtr< TimerCallback >	_callback

Detailed Description

A null implementation of a Yamaha OPL chip that runs the callback but doesn't output any audio.

Member Function Documentation

init()

bool OPL::NullOPL::init ( )

inlineoverridevirtual

Initializes the OPL emulator.

Returns

true on success, false on failure

Implements OPL::OPL.

reset()

void OPL::NullOPL::reset ( )

inlineoverridevirtual

Reinitializes the OPL emulator

Implements OPL::OPL.

write()

void OPL::NullOPL::write ( int  a, int  v  )

inlineoverridevirtual

Writes a byte to the given I/O port.

Parameters

a	port address
v	value, which will be written

Implements OPL::OPL.

writeReg()

void OPL::NullOPL::writeReg ( int  r, int  v  )

inlineoverridevirtual

Function to directly write to a specific OPL register. This writes to both chips for a Dual OPL2. We allow writing to secondary OPL registers by using register values >= 0x100.

Parameters

r	hardware register number to write to
v	value, which will be written

Implements OPL::OPL.

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The documentation for this class was generated from the following file:

• audio/fmopl.h