Got::MusicDriver_Got_AdLib Class Reference

Inheritance diagram for Got::MusicDriver_Got_AdLib:

Public Member Functions
	MusicDriver_Got_AdLib (uint8 timerFrequency)
int	open () override
void	close () override
void	syncSoundSettings () override
void	send (uint16 b) override
void	stopAllNotes () override
void	setTimerFrequency (uint8 timerFrequency) override
Public Member Functions inherited from Got::MusicDriver_Got
	MusicDriver_Got (uint8 timerFrequency)
bool	isOpen () const
void	onTimer ()
void	setTimerCallback (void *timer_param, Common::TimerManager::TimerProc timer_proc)

Static Public Attributes
static const uint8	OPL2_NUM_CHANNELS = 9
static const uint8	OPL_REGISTER_BASE_FREQMULT_MISC = 0x20
static const uint8	OPL_REGISTER_BASE_LEVEL = 0x40
static const uint8	OPL_REGISTER_BASE_DECAY_ATTACK = 0x60
static const uint8	OPL_REGISTER_BASE_RELEASE_SUSTAIN = 0x80
static const uint8	OPL_REGISTER_BASE_WAVEFORMSELECT = 0xE0
static const uint8	OPL_REGISTER_BASE_FNUMLOW = 0xA0
static const uint8	OPL_REGISTER_BASE_FNUMHIGH_BLOCK_KEYON = 0xB0
static const uint8	OPL_REGISTER_BASE_CONNECTION_FEEDBACK_PANNING = 0xC0

Protected Member Functions
void	initOpl ()
void	recalculateVolumes ()
uint8	calculateVolume (uint8 channel, uint8 operatorNum)
bool	isVolumeApplicableToOperator (uint8 oplChannel, uint8 operatorNum)
uint16	determineOperatorRegisterOffset (uint8 oplChannel, uint8 operatorNum)
void	writeRegister (uint8 oplRegister, uint8 value)

Protected Attributes
OPL::OPL *	_opl
uint8	_channelOp0LevelRegisterValues [OPL2_NUM_CHANNELS]
uint8	_channelOp1LevelRegisterValues [OPL2_NUM_CHANNELS]
uint8	_channelBxRegisterValues [OPL2_NUM_CHANNELS]
uint8	_channelConnectionValues [OPL2_NUM_CHANNELS]
uint16	_userMusicVolume
bool	_userMute
Protected Attributes inherited from Got::MusicDriver_Got
bool	_isOpen
int	_timerFrequency
void *	_timer_param
Common::TimerManager::TimerProc	_timer_proc

Member Function Documentation

initOpl()

void Got::MusicDriver_Got_AdLib::initOpl ( )

protected

Initializes the OPL registers to their default values.

isVolumeApplicableToOperator()

bool Got::MusicDriver_Got_AdLib::isVolumeApplicableToOperator ( uint8  oplChannel, uint8  operatorNum  )

protected

Determines if volume settings should be applied to the operator level. This depends on the type of the operator (carrier or modulator), which depends on the type of connection specified on the channel.

Parameters

oplChannel	The OPL channel
operatorNum	The number of the operator (0-1)

Returns

True if volume should be applied, false otherwise

determineOperatorRegisterOffset()

uint16 Got::MusicDriver_Got_AdLib::determineOperatorRegisterOffset ( uint8  oplChannel, uint8  operatorNum  )

protected

Determines the offset from a base register for the specified operator of the specified OPL channel. Add the offset to the base register to get the correct register for this operator and channel.

Parameters

oplChannel	The OPL channel for which to determine the offset.
operatorNum	The operator for which to determine the offset (0-1).

Returns

The offset to the base register for this operator.

Member Data Documentation

OPL2_NUM_CHANNELS

const uint8 Got::MusicDriver_Got_AdLib::OPL2_NUM_CHANNELS = 9

static

The number of available channels on the OPL2 chip.

OPL_REGISTER_BASE_FREQMULT_MISC

const uint8 Got::MusicDriver_Got_AdLib::OPL_REGISTER_BASE_FREQMULT_MISC = 0x20

static

OPL operator base registers.

OPL_REGISTER_BASE_FNUMLOW

const uint8 Got::MusicDriver_Got_AdLib::OPL_REGISTER_BASE_FNUMLOW = 0xA0

static

OPL channel base registers.

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

• engines/got/musicdriver_adlib.h