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Internal/Contributor docs for the Qt SDK. <b>Note:</b> These are NOT official API docs; those are found <a href='https://doc.qt.io/'>here</a>.
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QAlsaAudioSink Class Reference

#include <qalsaaudiosink_p.h>

+ Inheritance diagram for QAlsaAudioSink:
+ Collaboration diagram for QAlsaAudioSink:

Signals

void processMore ()
 
- Signals inherited from QAudioStateChangeNotifier
void errorChanged (QAudio::Error error)
 
void stateChanged (QAudio::State state)
 
- Signals inherited from QObject
void destroyed (QObject *=nullptr)
 This signal is emitted immediately before the object obj is destroyed, after any instances of QPointer have been notified, and cannot be blocked.
 
void objectNameChanged (const QString &objectName, QPrivateSignal)
 This signal is emitted after the object's name has been changed.
 

Public Member Functions

 QAlsaAudioSink (const QByteArray &device, QObject *parent)
 
 ~QAlsaAudioSink ()
 
qint64 write (const char *data, qint64 len)
 
void start (QIODevice *device) override
 
QIODevicestart () override
 
void stop () override
 
void reset () override
 
void suspend () override
 
void resume () override
 
qsizetype bytesFree () const override
 
void setBufferSize (qsizetype value) override
 
qsizetype bufferSize () const override
 
qint64 processedUSecs () const override
 
QAudio::Error error () const override
 
QAudio::State state () const override
 
void setFormat (const QAudioFormat &fmt) override
 
QAudioFormat format () const override
 
void setVolume (qreal) override
 
qreal volume () const override
 
- Public Member Functions inherited from QPlatformAudioSink
 QPlatformAudioSink (QObject *parent)
 
- Public Member Functions inherited from QAudioStateChangeNotifier
 QAudioStateChangeNotifier (QObject *parent=nullptr)
 
- Public Member Functions inherited from QObject
Q_INVOKABLE QObject (QObject *parent=nullptr)
 Constructs an object with parent object parent.
 
virtual ~QObject ()
 Destroys the object, deleting all its child objects.
 
virtual bool event (QEvent *event)
 This virtual function receives events to an object and should return true if the event e was recognized and processed.
 
virtual bool eventFilter (QObject *watched, QEvent *event)
 Filters events if this object has been installed as an event filter for the watched object.
 
QString objectName () const
 
Q_WEAK_OVERLOAD void setObjectName (const QString &name)
 Sets the object's name to name.
 
void setObjectName (QAnyStringView name)
 This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
 
QBindable< QStringbindableObjectName ()
 
bool isWidgetType () const
 Returns true if the object is a widget; otherwise returns false.
 
bool isWindowType () const
 Returns true if the object is a window; otherwise returns false.
 
bool isQuickItemType () const
 Returns true if the object is a QQuickItem; otherwise returns false.
 
bool signalsBlocked () const noexcept
 Returns true if signals are blocked; otherwise returns false.
 
bool blockSignals (bool b) noexcept
 If block is true, signals emitted by this object are blocked (i.e., emitting a signal will not invoke anything connected to it).
 
QThreadthread () const
 Returns the thread in which the object lives.
 
bool moveToThread (QThread *thread QT6_DECL_NEW_OVERLOAD_TAIL)
 Changes the thread affinity for this object and its children and returns true on success.
 
int startTimer (int interval, Qt::TimerType timerType=Qt::CoarseTimer)
 This is an overloaded function that will start a timer of type timerType and a timeout of interval milliseconds.
 
int startTimer (std::chrono::nanoseconds time, Qt::TimerType timerType=Qt::CoarseTimer)
 
void killTimer (int id)
 Kills the timer with timer identifier, id.
 
void killTimer (Qt::TimerId id)
 
template<typename T >
findChild (QAnyStringView aName, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
 Returns the child of this object that can be cast into type T and that is called name, or \nullptr if there is no such object.
 
template<typename T >
QList< T > findChildren (QAnyStringView aName, Qt::FindChildOptions options=Qt::FindChildrenRecursively) 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.
 
template<typename T >
findChild (Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
 This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
 
template<typename T >
QList< T > findChildren (Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
 This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
 
const QObjectListchildren () const
 Returns a list of child objects.
 
void setParent (QObject *parent)
 Makes the object a child of parent.
 
void installEventFilter (QObject *filterObj)
 Installs an event filter filterObj on this object.
 
void removeEventFilter (QObject *obj)
 Removes an event filter object obj from this object.
 
QMetaObject::Connection connect (const QObject *sender, const char *signal, const char *member, Qt::ConnectionType type=Qt::AutoConnection) const
 
bool disconnect (const char *signal=nullptr, const QObject *receiver=nullptr, const char *member=nullptr) const
 
bool disconnect (const QObject *receiver, const char *member=nullptr) const
 
void dumpObjectTree () const
 Dumps a tree of children to the debug output.
 
void dumpObjectInfo () const
 Dumps information about signal connections, etc.
 
bool setProperty (const char *name, const QVariant &value)
 Sets the value of the object's name property to value.
 
bool setProperty (const char *name, QVariant &&value)
 
QVariant property (const char *name) const
 Returns the value of the object's name property.
 
QList< QByteArraydynamicPropertyNames () const
 
QBindingStoragebindingStorage ()
 
const QBindingStoragebindingStorage () const
 
QObjectparent () const
 Returns a pointer to the parent object.
 
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.
 

Public Attributes

QIODeviceaudioSource = nullptr
 
QAudioFormat settings
 
QAudio::Error errorState = QAudio::NoError
 
QAudio::State deviceState = QAudio::StoppedState
 
QAudio::State suspendedInState = QAudio::SuspendedState
 
- Public Attributes inherited from QPlatformAudioSink
QElapsedTimer elapsedTime
 

Friends

class AlsaOutputPrivate
 

Additional Inherited Members

- Public Slots inherited from QObject
void deleteLater ()
 \threadsafe
 
- Static Public Member Functions inherited from QObject
static QMetaObject::Connection connect (const QObject *sender, const char *signal, const QObject *receiver, const char *member, Qt::ConnectionType=Qt::AutoConnection)
 \threadsafe
 
static QMetaObject::Connection connect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method, Qt::ConnectionType type=Qt::AutoConnection)
 
template<typename Func1 , typename Func2 >
static QMetaObject::Connection connect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, const typename QtPrivate::ContextTypeForFunctor< Func2 >::ContextType *context, Func2 &&slot, Qt::ConnectionType type=Qt::AutoConnection)
 
template<typename Func1 , typename Func2 >
static QMetaObject::Connection connect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, Func2 &&slot)
 
static bool disconnect (const QObject *sender, const char *signal, const QObject *receiver, const char *member)
 \threadsafe
 
static bool disconnect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &member)
 
static bool disconnect (const QMetaObject::Connection &)
 Disconnect a connection.
 
template<typename Func1 , typename Func2 >
static bool disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, const typename QtPrivate::FunctionPointer< Func2 >::Object *receiver, Func2 slot)
 
template<typename Func1 >
static bool disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, const QObject *receiver, void **zero)
 
- Protected Member Functions inherited from QObject
QObjectsender () const
 Returns a pointer to the object that sent the signal, if called in a slot activated by a signal; otherwise it returns \nullptr.
 
int senderSignalIndex () const
 
int receivers (const char *signal) const
 Returns the number of receivers connected to the signal.
 
bool isSignalConnected (const QMetaMethod &signal) const
 
virtual void timerEvent (QTimerEvent *event)
 This event handler can be reimplemented in a subclass to receive timer events for the object.
 
virtual void childEvent (QChildEvent *event)
 This event handler can be reimplemented in a subclass to receive child events.
 
virtual void customEvent (QEvent *event)
 This event handler can be reimplemented in a subclass to receive custom events.
 
virtual void connectNotify (const QMetaMethod &signal)
 
virtual void disconnectNotify (const QMetaMethod &signal)
 
 QObject (QObjectPrivate &dd, QObject *parent=nullptr)
 
- Protected Attributes inherited from QObject
QScopedPointer< QObjectDatad_ptr
 
- Properties inherited from QObject
QString objectName
 the name of this object
 

Detailed Description

Definition at line 34 of file qalsaaudiosink_p.h.

Constructor & Destructor Documentation

◆ QAlsaAudioSink()

QAlsaAudioSink::QAlsaAudioSink ( const QByteArray & device,
QObject * parent )

References setFormat().

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◆ ~QAlsaAudioSink()

QAlsaAudioSink::~QAlsaAudioSink ( )

Definition at line 36 of file qalsaaudiosink.cpp.

References disconnect(), QCoreApplication::processEvents(), and SIGNAL.

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Member Function Documentation

◆ bufferSize()

qsizetype QAlsaAudioSink::bufferSize ( ) const
overridevirtual

Implements QPlatformAudioSink.

Definition at line 510 of file qalsaaudiosink.cpp.

◆ bytesFree()

qsizetype QAlsaAudioSink::bytesFree ( ) const
overridevirtual

Implements QPlatformAudioSink.

Definition at line 428 of file qalsaaudiosink.cpp.

References QAudio::ActiveState, deviceState, and QAudio::IdleState.

Referenced by write().

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◆ error()

QAudio::Error QAlsaAudioSink::error ( ) const
overridevirtual

Implements QPlatformAudioSink.

Definition at line 54 of file qalsaaudiosink.cpp.

References errorState.

◆ format()

QAudioFormat QAlsaAudioSink::format ( ) const
overridevirtual

Implements QPlatformAudioSink.

Definition at line 550 of file qalsaaudiosink.cpp.

References settings.

◆ processedUSecs()

qint64 QAlsaAudioSink::processedUSecs ( ) const
overridevirtual

Implements QPlatformAudioSink.

Definition at line 515 of file qalsaaudiosink.cpp.

References QAudioFormat::sampleRate(), and settings.

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◆ processMore

void QAlsaAudioSink::processMore ( )
signal

References setFormat().

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◆ reset()

void QAlsaAudioSink::reset ( )
overridevirtual

Implements QPlatformAudioSink.

Definition at line 653 of file qalsaaudiosink.cpp.

References stop().

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◆ resume()

void QAlsaAudioSink::resume ( )
overridevirtual

Implements QPlatformAudioSink.

Definition at line 520 of file qalsaaudiosink.cpp.

References deviceState, emit, errorState, QAudio::NoError, QTimer::start(), QAudioStateChangeNotifier::stateChanged(), suspendedInState, and QAudio::SuspendedState.

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◆ setBufferSize()

void QAlsaAudioSink::setBufferSize ( qsizetype value)
overridevirtual

Implements QPlatformAudioSink.

Definition at line 504 of file qalsaaudiosink.cpp.

References deviceState, and QAudio::StoppedState.

◆ setFormat()

void QAlsaAudioSink::setFormat ( const QAudioFormat & fmt)
overridevirtual

Implements QPlatformAudioSink.

Definition at line 545 of file qalsaaudiosink.cpp.

References fmt, setFormat(), and settings.

Referenced by QAlsaAudioSink(), processMore(), and setFormat().

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◆ setVolume()

void QAlsaAudioSink::setVolume ( qreal vol)
overridevirtual

Reimplemented from QPlatformAudioSink.

Definition at line 44 of file qalsaaudiosink.cpp.

◆ start() [1/2]

QIODevice * QAlsaAudioSink::start ( )
overridevirtual

Implements QPlatformAudioSink.

Definition at line 172 of file qalsaaudiosink.cpp.

References AlsaOutputPrivate, audioSource, deviceState, emit, errorState, QAudio::IdleState, QAudio::NoError, QIODevice::open(), QAudioStateChangeNotifier::stateChanged(), QAudio::StoppedState, QIODeviceBase::Unbuffered, and QIODeviceBase::WriteOnly.

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◆ start() [2/2]

void QAlsaAudioSink::start ( QIODevice * device)
overridevirtual

Implements QPlatformAudioSink.

Definition at line 142 of file qalsaaudiosink.cpp.

References QAudio::ActiveState, audioSource, QObject::connect(), device, deviceState, emit, errorState, QTimer::isActive(), QAudio::NoError, QIODevice::readyRead(), QAudioStateChangeNotifier::stateChanged(), and QAudio::StoppedState.

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◆ state()

QAudio::State QAlsaAudioSink::state ( ) const
overridevirtual

Implements QPlatformAudioSink.

Definition at line 59 of file qalsaaudiosink.cpp.

References deviceState.

◆ stop()

void QAlsaAudioSink::stop ( )
overridevirtual

Implements QPlatformAudioSink.

Definition at line 200 of file qalsaaudiosink.cpp.

References deviceState, emit, errorState, QAudio::NoError, QAudioStateChangeNotifier::stateChanged(), and QAudio::StoppedState.

Referenced by reset().

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◆ suspend()

void QAlsaAudioSink::suspend ( )
overridevirtual

Implements QPlatformAudioSink.

Definition at line 555 of file qalsaaudiosink.cpp.

References QAudio::ActiveState, deviceState, emit, errorState, QAudio::IdleState, QAudio::NoError, QAudioStateChangeNotifier::stateChanged(), QTimer::stop(), suspendedInState, and QAudio::SuspendedState.

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◆ volume()

qreal QAlsaAudioSink::volume ( ) const
overridevirtual

Reimplemented from QPlatformAudioSink.

Definition at line 49 of file qalsaaudiosink.cpp.

◆ write()

qint64 QAlsaAudioSink::write ( const char * data,
qint64 len )

Definition at line 454 of file qalsaaudiosink.cpp.

References QAudio::ActiveState, bytesFree(), deviceState, emit, QAudioStateChangeNotifier::errorChanged(), errorState, QAudio::FatalError, QAudio::NoError, out, qDebug, QAudioHelperInternal::qMultiplySamples(), settings, QAudioStateChangeNotifier::stateChanged(), and QAudio::StoppedState.

Referenced by AlsaOutputPrivate::writeData().

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Friends And Related Symbol Documentation

◆ AlsaOutputPrivate

friend class AlsaOutputPrivate
friend

Definition at line 36 of file qalsaaudiosink_p.h.

Referenced by start().

Member Data Documentation

◆ audioSource

QIODevice* QAlsaAudioSink::audioSource = nullptr

Definition at line 62 of file qalsaaudiosink_p.h.

Referenced by start(), and start().

◆ deviceState

◆ errorState

QAudio::Error QAlsaAudioSink::errorState = QAudio::NoError

Definition at line 64 of file qalsaaudiosink_p.h.

Referenced by error(), resume(), start(), start(), stop(), suspend(), and write().

◆ settings

QAudioFormat QAlsaAudioSink::settings

Definition at line 63 of file qalsaaudiosink_p.h.

Referenced by format(), processedUSecs(), setFormat(), and write().

◆ suspendedInState

QAudio::State QAlsaAudioSink::suspendedInState = QAudio::SuspendedState

Definition at line 66 of file qalsaaudiosink_p.h.

Referenced by resume(), and suspend().


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