MADS::Dragonsphere::AdlibChannel Struct Reference

Public Member Functions
void	reset ()
void	load (byte *soundData)
void	setPtr2 (byte *ptr)
void	enable ()
void	processChannelFade ()

Public Attributes
uint8	_activeCount = 0
uint8	_pitchBend = 0
uint8	_volumeFadeStep = 0
uint8	_vibratoDepth = 0
uint8	_note = 0
uint8	_sampleIndex = 0
uint8	_volume = 0
uint8	_noteOffset = 0
uint8	_durationOverride = 0
uint8	_keyOnDelay = 0
uint8	_fadePeriodCounter = 0
uint8	_fadePeriodReload = 0
uint8	_arpPeriodCounter = 0
uint8	_vibPeriodCounter = 0
uint8	_vibPeriodReload = 0
uint8	_patchAttenuation = 0
uint8	_velocity = 0
uint8	_writeVolumePending = 0
uint8	_arpPeriodReload = 0
uint8	_arpCounterReload = 0
byte *	_loopStartPtr = nullptr
byte *	_pSrc = nullptr
byte *	_innerLoopPtr = nullptr
byte *	_outerLoopPtr = nullptr
byte *	_soundData = nullptr
byte *	_branchTargetPtr = nullptr
uint16	_innerLoopCount = 0
uint16	_outerLoopCount = 0
uint16	_noiseFreqMask = 0
uint16	_freqAccum = 0
uint16	_freqStep = 0
uint8	_cachedCarrierTL = 0
uint8	_savedFreqSweep = 0
uint8	_freqSweepCounter = 0
uint8	_savedSweepCounter = 0
uint8	_transpose = 0
uint8	_octaveTranspose = 0
uint8	_pendingStop = 0
uint8	_vibratoMode = 0

Static Public Attributes
static bool	_isDisabled

Member Function Documentation

reset()

void MADS::Dragonsphere::AdlibChannel::reset

(

)

Zeroes the "live" fields of one channel without touching the loop/sound-data pointers (those are handled separately by load).

load()

void MADS::Dragonsphere::AdlibChannel::load

(

byte *

soundData

)

Clears the entire channel struct, then initialises all loop/source pointers to the supplied sound-data address, sets _patchAttenuation to 0x40 (maximum, silent), and marks the channel active (_activeCount = 1).

setPtr2()

void MADS::Dragonsphere::AdlibChannel::setPtr2

(

byte *

ptr

)

Redirects _loopStartPtr and _pSrc to the null/silence stream and arms a one-step volume fade (_volumeFadeStep = 0xFF, _fadePeriodReload/Counter = 1) so the channel fades out gracefully over the next tick.

enable()

void MADS::Dragonsphere::AdlibChannel::enable

(

)

Marks the channel pending-stop (_pendingStop = 0xFF) and redirects _soundData to the null/silence stream. Unlike setPtr2 this does not touch _volumeFadeStep; the channel fades naturally via processChannelFade.

processChannelFade()

void MADS::Dragonsphere::AdlibChannel::processChannelFade

(

)

Called every frame for each channel. When _pendingStop is set, waits until both _velocity and _volume are zero before marking the channel idle (_activeCount = 0); otherwise applies _volumeFadeStep to velocity/volume each _fadePeriodReload ticks and clamps the result to [0, 0x7F].

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

• engines/mads/dragonsphere/asound.h