Qt 4.8
Public Functions | List of all members
QNullInputDevice Class Reference
Inheritance diagram for QNullInputDevice:
QAbstractAudioInput QObject

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...
 
QIODevicestart (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 QObjectListchildren () 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< QByteArraydynamicPropertyNames () 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 >
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 QMetaObjectmetaObject () 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
 
QObjectparent () 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...
 
QThreadthread () const
 Returns the thread in which the object lives. More...
 
QObjectUserDatauserData (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...
 
QObjectsender () 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< QObjectDatad_ptr
 
- Static Protected Variables inherited from QObject
static const QMetaObject staticQtMetaObject
 

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.

102 { 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.

99 { 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.

106 { return 0; }

◆ error()

QAudio::Error QNullInputDevice::error ( ) const
inlinevirtual

Returns the error state.

Implements QAbstractAudioInput.

Definition at line 107 of file qaudiodevicefactory.cpp.

107 { return QAudio::OpenError; }

◆ format()

QAudioFormat QNullInputDevice::format ( ) const
inlinevirtual

Returns the QAudioFormat being used.

Implements QAbstractAudioInput.

Definition at line 109 of file qaudiodevicefactory.cpp.

109 { return QAudioFormat(); }
The QAudioFormat class stores audio parameter information.
Definition: qaudioformat.h:60

◆ notifyInterval()

int QNullInputDevice::notifyInterval ( ) const
inlinevirtual

Returns the notify interval in milliseconds.

Implements QAbstractAudioInput.

Definition at line 104 of file qaudiodevicefactory.cpp.

104 { return 0; }

◆ periodSize()

int QNullInputDevice::periodSize ( ) const
inlinevirtual

Returns the period size in bytes.

Implements QAbstractAudioInput.

Definition at line 100 of file qaudiodevicefactory.cpp.

100 { 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.

105 { 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.

96 {}

◆ resume()

void QNullInputDevice::resume ( )
inlinevirtual

Resumes processing audio data after a suspend().

Implements QAbstractAudioInput.

Definition at line 98 of file qaudiodevicefactory.cpp.

98 {}

◆ 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.

101 {}

◆ 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.

103 {}

◆ 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.

94 { qWarning()<<"using null input device, none available"; return 0; }
Q_CORE_EXPORT void qWarning(const char *,...)

◆ state()

QAudio::State QNullInputDevice::state ( ) const
inlinevirtual

Returns the state of audio processing.

Implements QAbstractAudioInput.

Definition at line 108 of file qaudiodevicefactory.cpp.

◆ stop()

void QNullInputDevice::stop ( )
inlinevirtual

Stops the audio input.

Implements QAbstractAudioInput.

Definition at line 95 of file qaudiodevicefactory.cpp.

95 {}

◆ suspend()

void QNullInputDevice::suspend ( )
inlinevirtual

Stops processing audio data, preserving buffered audio data.

Implements QAbstractAudioInput.

Definition at line 97 of file qaudiodevicefactory.cpp.

97 {}

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