QNullInputDevice Class Reference

Inheritance diagram for QNullInputDevice:

Public Functions
int	bufferSize () const
	Returns the audio buffer size in milliseconds. More...
int	bytesReady () const
	Returns the amount of audio data available to read in bytes. More...
qint64	elapsedUSecs () const
	Returns the milliseconds since start() was called, including time in Idle and suspend states. More...
QAudio::Error	error () const
	Returns the error state. More...
QAudioFormat	format () const
	Returns the QAudioFormat being used. More...
int	notifyInterval () const
	Returns the notify interval in milliseconds. More...
int	periodSize () const
	Returns the period size in bytes. More...
qint64	processedUSecs () const
	Returns the amount of audio data processed since start() was called in milliseconds. More...
void	reset ()
	Drops all audio data in the buffers, resets buffers to zero. More...
void	resume ()
	Resumes processing audio data after a suspend(). More...
void	setBufferSize (int)
	Sets the audio buffer size to value in milliseconds. More...
void	setNotifyInterval (int)
	Sets the interval for notify() signal to be emitted. More...
QIODevice *	start (QIODevice *)
	Uses the device as the QIODevice to transfer data. More...
QAudio::State	state () const
	Returns the state of audio processing. More...
void	stop ()
	Stops the audio input. More...
void	suspend ()
	Stops processing audio data, preserving buffered audio data. More...
Public Functions inherited from QObject
bool	blockSignals (bool b)
	If block is true, signals emitted by this object are blocked (i.e., emitting a signal will not invoke anything connected to it). More...
const QObjectList &	children () const
	Returns a list of child objects. More...
bool	connect (const QObject *sender, const char *signal, const char *member, Qt::ConnectionType type=Qt::AutoConnection) const
bool	disconnect (const char *signal=0, const QObject *receiver=0, const char *member=0)
bool	disconnect (const QObject *receiver, const char *member=0)
void	dumpObjectInfo ()
	Dumps information about signal connections, etc. More...
void	dumpObjectTree ()
	Dumps a tree of children to the debug output. More...
QList< QByteArray >	dynamicPropertyNames () const
	Returns the names of all properties that were dynamically added to the object using setProperty(). More...
virtual bool	event (QEvent *)
	This virtual function receives events to an object and should return true if the event e was recognized and processed. More...
virtual bool	eventFilter (QObject *, QEvent *)
	Filters events if this object has been installed as an event filter for the watched object. More...
template<typename T >
T	findChild (const QString &aName=QString()) const
	Returns the child of this object that can be cast into type T and that is called name, or 0 if there is no such object. More...
template<typename T >
QList< T >	findChildren (const QString &aName=QString()) const
	Returns all children of this object with the given name that can be cast to type T, or an empty list if there are no such objects. More...
template<typename T >
QList< T >	findChildren (const QRegExp &re) const
bool	inherits (const char *classname) const
	Returns true if this object is an instance of a class that inherits className or a QObject subclass that inherits className; otherwise returns false. More...
void	installEventFilter (QObject *)
	Installs an event filter filterObj on this object. More...
bool	isWidgetType () const
	Returns true if the object is a widget; otherwise returns false. More...
void	killTimer (int id)
	Kills the timer with timer identifier, id. More...
virtual const QMetaObject *	metaObject () const
	Returns a pointer to the meta-object of this object. More...
void	moveToThread (QThread *thread)
	Changes the thread affinity for this object and its children. More...
QString	objectName () const
QObject *	parent () const
	Returns a pointer to the parent object. More...
QVariant	property (const char *name) const
	Returns the value of the object's name property. More...
Q_INVOKABLE	QObject (QObject *parent=0)
	Constructs an object with parent object parent. More...
void	removeEventFilter (QObject *)
	Removes an event filter object obj from this object. More...
void	setObjectName (const QString &name)
void	setParent (QObject *)
	Makes the object a child of parent. More...
bool	setProperty (const char *name, const QVariant &value)
	Sets the value of the object's name property to value. More...
void	setUserData (uint id, QObjectUserData *data)
bool	signalsBlocked () const
	Returns true if signals are blocked; otherwise returns false. More...
int	startTimer (int interval)
	Starts a timer and returns a timer identifier, or returns zero if it could not start a timer. More...
QThread *	thread () const
	Returns the thread in which the object lives. More...
QObjectUserData *	userData (uint id) const
virtual	~QObject ()
	Destroys the object, deleting all its child objects. More...

Additional Inherited Members
Public Slots inherited from QObject
void	deleteLater ()
	Schedules this object for deletion. More...
Signals inherited from QAbstractAudioInput
void	notify ()
	This signal is emitted when x ms of audio data has been processed the interval set by setNotifyInterval(x). More...
void	stateChanged (QAudio::State)
	This signal is emitted when the device state has changed. More...
Signals inherited from QObject
void	destroyed (QObject *=0)
	This signal is emitted immediately before the object obj is destroyed, and can not be blocked. More...
Static Public Functions inherited from QObject
static bool	connect (const QObject *sender, const char *signal, const QObject *receiver, const char *member, Qt::ConnectionType=Qt::AutoConnection)
	Creates a connection of the given type from the signal in the sender object to the method in the receiver object. More...
static bool	connect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method, Qt::ConnectionType type=Qt::AutoConnection)
static bool	disconnect (const QObject *sender, const char *signal, const QObject *receiver, const char *member)
	Disconnects signal in object sender from method in object receiver. More...
static bool	disconnect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &member)
static uint	registerUserData ()
static QString	tr (const char *sourceText, const char *comment=0, int n=-1)
static QString	trUtf8 (const char *sourceText, const char *comment=0, int n=-1)
Static Public Variables inherited from QObject
static const QMetaObject	staticMetaObject
	This variable stores the meta-object for the class. More...
Protected Functions inherited from QObject
virtual void	childEvent (QChildEvent *)
	This event handler can be reimplemented in a subclass to receive child events. More...
virtual void	connectNotify (const char *signal)
	This virtual function is called when something has been connected to signal in this object. More...
virtual void	customEvent (QEvent *)
	This event handler can be reimplemented in a subclass to receive custom events. More...
virtual void	disconnectNotify (const char *signal)
	This virtual function is called when something has been disconnected from signal in this object. More...
	QObject (QObjectPrivate &dd, QObject *parent=0)
int	receivers (const char *signal) const
	Returns the number of receivers connected to the signal. More...
QObject *	sender () const
	Returns a pointer to the object that sent the signal, if called in a slot activated by a signal; otherwise it returns 0. More...
int	senderSignalIndex () const
virtual void	timerEvent (QTimerEvent *)
	This event handler can be reimplemented in a subclass to receive timer events for the object. More...
Protected Variables inherited from QObject
QScopedPointer< QObjectData >	d_ptr
Static Protected Variables inherited from QObject
static const QMetaObject	staticQtMetaObject
Related Functions inherited from QObject
T	qFindChildqFindChildren (const QObject *obj, const QString &name)()
QList< T >	qFindChildrenqFindChildren (const QObject *obj, const QString &name)()
QList< T >	qFindChildrenqFindChildren (const QObject *obj, const QRegExp &regExp)()
T *	qobject_cast (QObject *object)
	QObjectList
void *	qt_find_obj_child (QObject *parent, const char *type, const QString &name)
	Returns a pointer to the object named name that inherits type and with a given parent. More...

Detailed Description

Definition at line 91 of file qaudiodevicefactory.cpp.

Functions

bufferSize()

int QNullInputDevice::bufferSize ( ) const

inlinevirtual

Returns the audio buffer size in milliseconds.

Implements QAbstractAudioInput.

Definition at line 102 of file qaudiodevicefactory.cpp.

{ return 0; }

bytesReady()

int QNullInputDevice::bytesReady ( ) const

inlinevirtual

Returns the amount of audio data available to read in bytes.

Implements QAbstractAudioInput.

Definition at line 99 of file qaudiodevicefactory.cpp.

{ return 0; }

elapsedUSecs()

qint64 QNullInputDevice::elapsedUSecs ( ) const

inlinevirtual

Returns the milliseconds since start() was called, including time in Idle and suspend states.

Implements QAbstractAudioInput.

Definition at line 106 of file qaudiodevicefactory.cpp.

{ return 0; }

error()

QAudio::Error QNullInputDevice::error ( ) const

inlinevirtual

Returns the error state.

Implements QAbstractAudioInput.

Definition at line 107 of file qaudiodevicefactory.cpp.

{ return QAudio::OpenError; }

format()

QAudioFormat QNullInputDevice::format ( ) const

inlinevirtual

Returns the QAudioFormat being used.

Implements QAbstractAudioInput.

Definition at line 109 of file qaudiodevicefactory.cpp.

{ return QAudioFormat(); }

notifyInterval()

int QNullInputDevice::notifyInterval ( ) const

inlinevirtual

Returns the notify interval in milliseconds.

Implements QAbstractAudioInput.

Definition at line 104 of file qaudiodevicefactory.cpp.

{ return 0; }

periodSize()

int QNullInputDevice::periodSize ( ) const

inlinevirtual

Returns the period size in bytes.

Implements QAbstractAudioInput.

Definition at line 100 of file qaudiodevicefactory.cpp.

{ return 0; }

processedUSecs()

qint64 QNullInputDevice::processedUSecs ( ) const

inlinevirtual

Returns the amount of audio data processed since start() was called in milliseconds.

Implements QAbstractAudioInput.

Definition at line 105 of file qaudiodevicefactory.cpp.

{ return 0; }

reset()

void QNullInputDevice::reset ( )

inlinevirtual

Drops all audio data in the buffers, resets buffers to zero.

Implements QAbstractAudioInput.

Definition at line 96 of file qaudiodevicefactory.cpp.

{}

resume()

void QNullInputDevice::resume ( )

inlinevirtual

Resumes processing audio data after a suspend().

Implements QAbstractAudioInput.

Definition at line 98 of file qaudiodevicefactory.cpp.

{}

setBufferSize()

void QNullInputDevice::setBufferSize ( int  value )

inlinevirtual

Sets the audio buffer size to value in milliseconds.

Implements QAbstractAudioInput.

Definition at line 101 of file qaudiodevicefactory.cpp.

{}

setNotifyInterval()

void QNullInputDevice::setNotifyInterval ( int  ms )

inlinevirtual

Sets the interval for notify() signal to be emitted.

This is based on the ms of audio data processed not on actual real-time. The resolution of the timer is platform specific.

Implements QAbstractAudioInput.

Definition at line 103 of file qaudiodevicefactory.cpp.

{}

start()

QIODevice* QNullInputDevice::start ( QIODevice *  device )

inlinevirtual

Uses the device as the QIODevice to transfer data.

If device is null then the class creates an internal QIODevice. Returns a pointer to the QIODevice being used to handle the data transfer. This QIODevice can be used to read() audio data directly. Passing a QIODevice allows the data to be transferred without any extra code.

Implements QAbstractAudioInput.

Definition at line 94 of file qaudiodevicefactory.cpp.

{ qWarning()<<"using null input device, none available"; return 0; }

state()

QAudio::State QNullInputDevice::state ( ) const

inlinevirtual

Returns the state of audio processing.

Implements QAbstractAudioInput.

Definition at line 108 of file qaudiodevicefactory.cpp.

{ return QAudio::StoppedState; }

stop()

void QNullInputDevice::stop ( )

inlinevirtual

Stops the audio input.

Implements QAbstractAudioInput.

Definition at line 95 of file qaudiodevicefactory.cpp.

{}

suspend()

void QNullInputDevice::suspend ( )

inlinevirtual

Stops processing audio data, preserving buffered audio data.

Implements QAbstractAudioInput.

Definition at line 97 of file qaudiodevicefactory.cpp.

{}

---

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

• /src/multimedia/audio/qaudiodevicefactory.cpp