VariableEvent Class Reference

Base class for variable length events. More...

#include <alsaevent.h>

Inheritance diagram for VariableEvent:

Public Member Functions
	VariableEvent ()
	Default constructor.
	VariableEvent (const snd_seq_event_t *event)
	Constructor from an ALSA event record. More...
	VariableEvent (const QByteArray &data)
	Constructor from an arbitrary data array. More...
	VariableEvent (const VariableEvent &other)
	Copy constructor. More...
	VariableEvent (const unsigned int datalen, char *dataptr)
	Constructor from a data pointer. More...
VariableEvent &	operator= (const VariableEvent &other)
	Assignment operator. More...
unsigned int	getLength () const
	Gets the data length. More...
const char *	getData () const
	Gets the data pointer. More...
virtual VariableEvent *	clone () const override
	Clone this object returning a pointer to the new object. More...
void	setSequencerType (const snd_seq_event_type_t eventType)
	Sets the event's ALSA sequencer type. More...
snd_seq_event_type_t	getSequencerType () const
	Gets the sequencer event type. More...
void	setDestination (const unsigned char client, const unsigned char port)
	Sets the client:port destination of the event. More...
void	setSource (const unsigned char port)
	Sets the event's source port ID. More...
unsigned char	getSourceClient () const
	Gets the source client id. More...
unsigned char	getSourcePort () const
	Gets the source port id. More...
snd_seq_tick_time_t	getTick () const
	Gets the tick time of the event. More...
unsigned int	getRealTimeSecs () const
	Gets the seconds of the event's real time. More...
unsigned int	getRealTimeNanos () const
	Gets the nanoseconds of the event's real time. More...
void	setSubscribers ()
	Sets the event's destination to be all the subscribers of the source port.
void	setBroadcast ()
	Sets the event's destination to be all queues/clients/ports/channels.
void	setDirect ()
	Sets the event to be immediately delivered, not queued/scheduled. More...
void	scheduleTick (const int queue, const int tick, const bool relative)
	Sets the event to be scheduled in musical time (ticks) units. More...
void	scheduleReal (const int queue, const ulong secs, const ulong nanos, const bool relative)
	Sets the event to be scheduled in real (clock) time units. More...
void	setPriority (const bool high)
	Sets the priority of the event. More...
unsigned char	getTag () const
	Gets the tag of the event. More...
void	setTag (const unsigned char aTag)
	Sets the event's tag. More...
unsigned int	getRaw32 (const unsigned int n) const
	Gets an event's raw 32 bits parameter. More...
void	setRaw32 (const unsigned int n, const unsigned int value)
	Sets an event's raw 32 bits parameter. More...
unsigned char	getRaw8 (const unsigned int n) const
	Gets an event's raw 8 bits parameter. More...
void	setRaw8 (const unsigned int n, const unsigned char value)
	Sets an event's raw 8 bits parameter. More...
snd_seq_event_t *	getHandle ()
	Gets the handle of the event. More...
int	getEncodedLength ()
	Gets the encoded length of the event record. More...

Static Public Member Functions
static bool	isSubscription (const SequencerEvent *event)
	Checks if the event's type is a subscription. More...
static bool	isPort (const SequencerEvent *event)
	Checks if the event's type is of type port. More...
static bool	isClient (const SequencerEvent *event)
	Checks if the event's type is of type client. More...
static bool	isConnectionChange (const SequencerEvent *event)
	Checks if the event's type is of type connection change. More...
static bool	isChannel (const SequencerEvent *event)
	Checks if the event's type is a Channel Voice message. More...

Protected Member Functions
Q_DECL_DEPRECATED void	free ()
	Releases the event record. More...

Protected Attributes
snd_seq_event_t	m_event
	ALSA sequencer event record. More...

Detailed Description

Base class for variable length events.

Definition at line 458 of file alsaevent.h.

Constructor & Destructor Documentation

VariableEvent() [1/4]

VariableEvent ( const snd_seq_event_t *  event )

explicit

Constructor from an ALSA event record.

Parameters

event

ALSA event record.

Definition at line 584 of file alsaevent.cpp.

References SequencerEvent::m_event.

VariableEvent() [2/4]

VariableEvent ( const QByteArray &  data )

explicit

Constructor from an arbitrary data array.

Parameters

data	A data byte array.

Definition at line 596 of file alsaevent.cpp.

References SequencerEvent::m_event.

VariableEvent() [3/4]

VariableEvent

(

const VariableEvent &

other

)

Copy constructor.

Parameters

other

Another VariableEvent instance. s

Definition at line 607 of file alsaevent.cpp.

References SequencerEvent::m_event.

VariableEvent() [4/4]

VariableEvent	(	const unsigned int	datalen,
		char *	dataptr
	)

Constructor from a data pointer.

Parameters

datalen	Length of the data.
dataptr	Pointer the data.

Definition at line 619 of file alsaevent.cpp.

References SequencerEvent::m_event.

Member Function Documentation

clone()

VariableEvent * clone ( ) const

overridevirtual

Clone this object returning a pointer to the new object.

Returns

pointer to the new object

Reimplemented from SequencerEvent.

Reimplemented in SysExEvent, and TextEvent.

Definition at line 643 of file alsaevent.cpp.

References SequencerEvent::m_event, and VariableEvent::VariableEvent().

free()

void free ( )

protectedinherited

Releases the event record.

Deprecated:

the event record is not allocated, so you don't have to call this function

Definition at line 371 of file alsaevent.cpp.

References SequencerEvent::m_event.

getData()

const char * getData ( ) const

inline

Gets the data pointer.

Returns

the data pointer

Examples

dumpmid.cpp.

Definition at line 476 of file alsaevent.h.

getEncodedLength()

int getEncodedLength ( )

inherited

Gets the encoded length of the event record.

Returns

The encoded length.

Definition at line 380 of file alsaevent.cpp.

References SequencerEvent::m_event.

getHandle()

snd_seq_event_t * getHandle ( )

inlineinherited

Gets the handle of the event.

Returns

The event's handle

Definition at line 135 of file alsaevent.h.

Referenced by MidiClient::output(), MidiClient::outputBuffer(), MidiClient::outputDirect(), SequencerOutputThread::sendSongEvent(), MidiQueue::setRealTimePosition(), and MidiQueue::setTickPosition().

getLength()

unsigned int getLength ( ) const

inline

Gets the data length.

Returns

the data length

Examples

dumpmid.cpp.

Definition at line 471 of file alsaevent.h.

getRaw32()

unsigned int getRaw32 ( const unsigned int  n ) const

inherited

Gets an event's raw 32 bits parameter.

Parameters

n	The parameter index, between 0 and 2.

Returns

The parameter's value.

See also

setRaw32()

Definition at line 329 of file alsaevent.cpp.

References SequencerEvent::m_event.

getRaw8()

unsigned char getRaw8 ( const unsigned int  n ) const

inherited

Gets an event's raw 8 bits parameter.

Parameters

n	The parameter index, between 0 and 11.

Returns

The parameter's value.

See also

setRaw8()

Definition at line 351 of file alsaevent.cpp.

References SequencerEvent::m_event.

getRealTimeNanos()

unsigned int getRealTimeNanos ( ) const

inlineinherited

Gets the nanoseconds of the event's real time.

Returns

The nanoseconds of the time.

See also

scheduleReal(), getRealTimeSecs()

Definition at line 113 of file alsaevent.h.

getRealTimeSecs()

unsigned int getRealTimeSecs ( ) const

inlineinherited

Gets the seconds of the event's real time.

Returns

The seconds of the time.

See also

scheduleReal(), getRealTimeNanos()

Definition at line 107 of file alsaevent.h.

getSequencerType()

snd_seq_event_type_t getSequencerType ( ) const

inlineinherited

Gets the sequencer event type.

Returns

The sequencer event type.

See also

setSequencerType()

Examples

drumgrid.cpp, dumpmid.cpp, and metronome.cpp.

Definition at line 81 of file alsaevent.h.

getSourceClient()

unsigned char getSourceClient ( ) const

inlineinherited

Gets the source client id.

Returns

The source client id.

See also

setSource()

Examples

dumpmid.cpp.

Definition at line 89 of file alsaevent.h.

getSourcePort()

unsigned char getSourcePort ( ) const

inlineinherited

Gets the source port id.

Returns

The source port id.

See also

setSource()

Examples

dumpmid.cpp.

Definition at line 95 of file alsaevent.h.

getTag()

unsigned char getTag ( ) const

inlineinherited

Gets the tag of the event.

Returns

The event's tag

See also

setTag()

Definition at line 125 of file alsaevent.h.

getTick()

snd_seq_tick_time_t getTick ( ) const

inlineinherited

Gets the tick time of the event.

Returns

The tick time.

See also

scheduleTick()

Examples

drumgrid.cpp, dumpmid.cpp, and metronome.cpp.

Definition at line 101 of file alsaevent.h.

isChannel()

bool isChannel ( const SequencerEvent *  event )

staticinherited

Checks if the event's type is a Channel Voice message.

Parameters

event

A SequencerEvent object pointer

Returns

True if the event is a channel voice message.

Since

0.2.0

Definition at line 203 of file alsaevent.cpp.

isClient()

bool isClient ( const SequencerEvent *  event )

staticinherited

Checks if the event's type is of type client.

Parameters

event

A SequencerEvent object pointer

Returns

True if the event has a client start/exit/change type.

Definition at line 169 of file alsaevent.cpp.

isConnectionChange()

bool isConnectionChange ( const SequencerEvent *  event )

staticinherited

Checks if the event's type is of type connection change.

Parameters

event

A SequencerEvent object pointer

Returns

True if the event has a client/port/subscription type.

Definition at line 183 of file alsaevent.cpp.

Referenced by SequencerOutputThread::run().

isPort()

bool isPort ( const SequencerEvent *  event )

staticinherited

Checks if the event's type is of type port.

Parameters

event

A SequencerEvent object pointer

Returns

True if the event has a port start/exit/change type.

Definition at line 155 of file alsaevent.cpp.

isSubscription()

bool isSubscription ( const SequencerEvent *  event )

staticinherited

Checks if the event's type is a subscription.

Parameters

event

A SequencerEvent object pointer

Returns

True if the event has a subscribe/unsubscribe type.

Definition at line 142 of file alsaevent.cpp.

operator=()

VariableEvent & operator=

(

const VariableEvent &

other

)

Assignment operator.

Parameters

other

Another VariableEvent object reference

Returns

Pointer to this object

Definition at line 631 of file alsaevent.cpp.

References SequencerEvent::m_event.

scheduleReal()

void scheduleReal ( const int  queue, const ulong  secs, const ulong  nanos, const bool  relative  )

inherited

Sets the event to be scheduled in real (clock) time units.

Parameters

queue	The queue number to be used.
secs	The time in whole seconds.
nanos	The nanoseconds to be added.
relative	Use relative (to the current) time instead of absolute time.

Definition at line 290 of file alsaevent.cpp.

References SequencerEvent::m_event.

scheduleTick()

void scheduleTick ( const int  queue, const int  tick, const bool  relative  )

inherited

Sets the event to be scheduled in musical time (ticks) units.

Parameters

queue	The queue number to be used.
tick	The time in ticks.
relative	Use relative (to the current) time instead of absolute time.

Examples

drumgrid.cpp, and metronome.cpp.

Definition at line 278 of file alsaevent.cpp.

References SequencerEvent::m_event.

Referenced by SequencerOutputThread::sendEchoEvent().

setDestination()

void setDestination ( const unsigned char  client, const unsigned char  port  )

inherited

Sets the client:port destination of the event.

Parameters

client	The destination's client ID
port	The destination port ID

See also

setSubscribers()

Examples

drumgrid.cpp, and metronome.cpp.

Definition at line 232 of file alsaevent.cpp.

References SequencerEvent::m_event.

Referenced by SequencerOutputThread::sendEchoEvent().

setDirect()

void setDirect ( )

inherited

Sets the event to be immediately delivered, not queued/scheduled.

See also

scheduleTick(), scheduleReal()

Examples

drumgrid.cpp, and metronome.cpp.

Definition at line 267 of file alsaevent.cpp.

References SequencerEvent::m_event.

setPriority()

void setPriority ( const bool  high )

inherited

Sets the priority of the event.

This is used in case of several events share the same scheduling time.

Parameters

high	Mark the event as a high priority one.

Definition at line 304 of file alsaevent.cpp.

References SequencerEvent::m_event.

setRaw32()

void setRaw32 ( const unsigned int  n, const unsigned int  value  )

inherited

Sets an event's raw 32 bits parameter.

Parameters

n	The parameter index, between 0 and 2.
value	The parameter's value.

Definition at line 340 of file alsaevent.cpp.

References SequencerEvent::m_event.

setRaw8()

void setRaw8 ( const unsigned int  n, const unsigned char  value  )

inherited

Sets an event's raw 8 bits parameter.

Parameters

n	The parameter index, between 0 and 11.
value	The parameter's value.

Definition at line 362 of file alsaevent.cpp.

References SequencerEvent::m_event.

setSequencerType()

void setSequencerType ( const snd_seq_event_type_t  eventType )

inherited

Sets the event's ALSA sequencer type.

Parameters

eventType

The ALSA sequencer type

Definition at line 221 of file alsaevent.cpp.

References SequencerEvent::m_event.

Referenced by TextEvent::operator=(), SystemEvent::SystemEvent(), TextEvent::TextEvent(), and ValueEvent::ValueEvent().

setSource()

void setSource ( const unsigned char  port )

inherited

Sets the event's source port ID.

Parameters

port	The source port ID

See also

getSourceClient(), getSourcePort()

Examples

drumgrid.cpp, and metronome.cpp.

Definition at line 242 of file alsaevent.cpp.

References SequencerEvent::m_event.

Referenced by SequencerOutputThread::sendEchoEvent().

setTag()

void setTag ( const unsigned char  aTag )

inherited

Sets the event's tag.

This attribute is any arbitrary number, not used by the ALSA library. Range limited to 0 thru 255.

Parameters

aTag	A tag number.

Definition at line 314 of file alsaevent.cpp.

References SequencerEvent::m_event.

Member Data Documentation

m_event

snd_seq_event_t m_event

protectedinherited

ALSA sequencer event record.

See also

https://www.alsa-project.org/alsa-doc/alsa-lib/structsnd__seq__event.html

Definition at line 152 of file alsaevent.h.

Referenced by ChanPressEvent::ChanPressEvent(), SequencerEvent::clone(), ChannelEvent::clone(), KeyEvent::clone(), NoteEvent::clone(), NoteOnEvent::clone(), NoteOffEvent::clone(), KeyPressEvent::clone(), ControllerEvent::clone(), ProgramChangeEvent::clone(), PitchBendEvent::clone(), ChanPressEvent::clone(), VariableEvent::clone(), SysExEvent::clone(), TextEvent::clone(), SystemEvent::clone(), QueueControlEvent::clone(), ValueEvent::clone(), TempoEvent::clone(), SubscriptionEvent::clone(), ClientEvent::clone(), PortEvent::clone(), ControllerEvent::ControllerEvent(), SequencerEvent::free(), SequencerEvent::getEncodedLength(), SequencerEvent::getRaw32(), SequencerEvent::getRaw8(), KeyPressEvent::KeyPressEvent(), NoteEvent::NoteEvent(), NoteOffEvent::NoteOffEvent(), NoteOnEvent::NoteOnEvent(), SequencerEvent::operator=(), SysExEvent::operator=(), TextEvent::operator=(), VariableEvent::operator=(), PitchBendEvent::PitchBendEvent(), ProgramChangeEvent::ProgramChangeEvent(), QueueControlEvent::QueueControlEvent(), SequencerEvent::scheduleReal(), SequencerEvent::scheduleTick(), SequencerEvent::SequencerEvent(), SequencerEvent::setBroadcast(), SequencerEvent::setDestination(), SequencerEvent::setDirect(), SequencerEvent::setPriority(), SequencerEvent::setRaw32(), SequencerEvent::setRaw8(), SequencerEvent::setSequencerType(), SequencerEvent::setSource(), SequencerEvent::setSubscribers(), SequencerEvent::setTag(), SysExEvent::SysExEvent(), SystemEvent::SystemEvent(), TempoEvent::TempoEvent(), ValueEvent::ValueEvent(), and VariableEvent::VariableEvent().

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

• alsaevent.h
• alsaevent.cpp