Inheritance diagram for QtMultimediaInternal::QAudioOutputBuffer:

Signals
void	readyRead ()

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...

Public Functions
int	available () const

	QAudioOutputBuffer (int bufferSize, int maxPeriodSize, QAudioFormat const &audioFormat)

qint64	readFrames (char *data, qint64 maxFrames)

void	reset ()

void	setPrefetchDevice (QIODevice *device)

void	startFillTimer ()

void	stopFillTimer ()

qint64	writeBytes (const char *data, qint64 maxSize)

	~QAudioOutputBuffer ()

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...

Private Slots
void	fillBuffer ()

Properties
QAudioRingBuffer *	m_buffer

int	m_bytesPerFrame

QIODevice *	m_device

bool	m_deviceError

QTimer *	m_fillTimer

int	m_maxPeriodSize

int	m_periodTime

Additional Inherited Members
Public Slots inherited from QObject
void	deleteLater ()
	Schedules this object for deletion. 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 79 of file qaudiooutput_mac_p.cpp.

Constructors and Destructors

◆ QAudioOutputBuffer()

QtMultimediaInternal::QAudioOutputBuffer::QAudioOutputBuffer	(	int	bufferSize,
		int	maxPeriodSize,
		QAudioFormat const &	audioFormat
	)

inline

Definition at line 84 of file qaudiooutput_mac_p.cpp.

                                                                                           :
         m_deviceError(false),
         m_maxPeriodSize(maxPeriodSize),
         m_device(0)
     {
         m_buffer = new QAudioRingBuffer(bufferSize + (bufferSize % maxPeriodSize == 0 ? 0 : maxPeriodSize - (bufferSize % maxPeriodSize)));
         m_bytesPerFrame = (audioFormat.sampleSize() / 8) * audioFormat.channels();
         m_periodTime = m_maxPeriodSize / m_bytesPerFrame * 1000 / audioFormat.frequency();
 
         m_fillTimer = new QTimer(this);
         connect(m_fillTimer, SIGNAL(timeout()), SLOT(fillBuffer()));
     }

◆ ~QAudioOutputBuffer()

QtMultimediaInternal::QAudioOutputBuffer::~QAudioOutputBuffer ( )

inline

Definition at line 97 of file qaudiooutput_mac_p.cpp.

     {
         delete m_buffer;
     }

Functions

◆ available()

int QtMultimediaInternal::QAudioOutputBuffer::available ( ) const

inline

Definition at line 152 of file qaudiooutput_mac_p.cpp.

     {
         return m_buffer->free();
     }

◆ fillBuffer

void QtMultimediaInternal::QAudioOutputBuffer::fillBuffer ( )

inlineprivateslot

Definition at line 187 of file qaudiooutput_mac_p.cpp.

Referenced by QAudioOutputBuffer(), and setPrefetchDevice().

     {
         const int free = m_buffer->free();
         const int writeSize = free - (free % m_maxPeriodSize);
 
         if (writeSize > 0) {
             bool    wecan = true;
             int     filled = 0;
 
             while (!m_deviceError && wecan && filled < writeSize) {
                 QAudioRingBuffer::Region region = m_buffer->acquireWriteRegion(writeSize - filled);
 
                 if (region.second > 0) {
                     region.second = m_device->read(region.first, region.second);
                     if (region.second > 0)
                         filled += region.second;
                     else if (region.second == 0)
                         wecan = false;
                     else if (region.second < 0) {
                         m_fillTimer->stop();
                         region.second = 0;
                         m_deviceError = true;
                     }
                 }
                 else
                     wecan = false;
 
                 m_buffer->releaseWriteRegion(region);
             }
 
             if (filled > 0)
                 emit readyRead();
         }
     }

◆ readFrames()

qint64 QtMultimediaInternal::QAudioOutputBuffer::readFrames	(	char *	data,
		qint64	maxFrames
	)

inline

Definition at line 102 of file qaudiooutput_mac_p.cpp.

     {
         bool    wecan = true;
         qint64  framesRead = 0;
 
         while (wecan && framesRead < maxFrames) {
             QAudioRingBuffer::Region region = m_buffer->acquireReadRegion((maxFrames - framesRead) * m_bytesPerFrame);
 
             if (region.second > 0) {
                 region.second -= region.second % m_bytesPerFrame;
                 memcpy(data + (framesRead * m_bytesPerFrame), region.first, region.second);
                 framesRead += region.second / m_bytesPerFrame;
             }
             else
                 wecan = false;
 
             m_buffer->releaseReadRegion(region);
         }
 
         if (framesRead == 0 && m_deviceError)
             framesRead = -1;
 
         return framesRead;
     }

◆ readyRead

void QtMultimediaInternal::QAudioOutputBuffer::readyRead ( )

signal

Referenced by fillBuffer(), stopFillTimer(), and writeBytes().

◆ reset()

void QtMultimediaInternal::QAudioOutputBuffer::reset ( )

inline

Definition at line 157 of file qaudiooutput_mac_p.cpp.

     {
         m_buffer->reset();
         m_deviceError = false;
     }

◆ setPrefetchDevice()

void QtMultimediaInternal::QAudioOutputBuffer::setPrefetchDevice ( QIODevice * device )

inline

Definition at line 163 of file qaudiooutput_mac_p.cpp.

     {
         if (m_device != device) {
             m_device = device;
             if (m_device != 0)
                 fillBuffer();
         }
     }

◆ startFillTimer()

void QtMultimediaInternal::QAudioOutputBuffer::startFillTimer ( )

inline

Definition at line 172 of file qaudiooutput_mac_p.cpp.

     {
         if (m_device != 0)
             m_fillTimer->start(m_buffer->size() / 2 / m_maxPeriodSize * m_periodTime);
     }

◆ stopFillTimer()

void QtMultimediaInternal::QAudioOutputBuffer::stopFillTimer ( )

inline

Definition at line 178 of file qaudiooutput_mac_p.cpp.

     {
         m_fillTimer->stop();
     }

◆ writeBytes()

qint64 QtMultimediaInternal::QAudioOutputBuffer::writeBytes	(	const char *	data,
		qint64	maxSize
	)

inline

Definition at line 127 of file qaudiooutput_mac_p.cpp.

     {
         bool    wecan = true;
         qint64  bytesWritten = 0;
 
         maxSize -= maxSize % m_bytesPerFrame;
         while (wecan && bytesWritten < maxSize) {
             QAudioRingBuffer::Region region = m_buffer->acquireWriteRegion(maxSize - bytesWritten);
 
             if (region.second > 0) {
                 memcpy(region.first, data + bytesWritten, region.second);
                 bytesWritten += region.second;
             }
             else
                 wecan = false;
 
             m_buffer->releaseWriteRegion(region);
         }
 
         if (bytesWritten > 0)
             emit readyRead();
 
         return bytesWritten;
     }

Properties

◆ m_buffer

QAudioRingBuffer* QtMultimediaInternal::QAudioOutputBuffer::m_buffer

private

Definition at line 229 of file qaudiooutput_mac_p.cpp.

Referenced by available(), fillBuffer(), QAudioOutputBuffer(), readFrames(), reset(), startFillTimer(), writeBytes(), and ~QAudioOutputBuffer().

◆ m_bytesPerFrame

int QtMultimediaInternal::QAudioOutputBuffer::m_bytesPerFrame

private

Definition at line 225 of file qaudiooutput_mac_p.cpp.

Referenced by QAudioOutputBuffer(), readFrames(), and writeBytes().

◆ m_device

QIODevice* QtMultimediaInternal::QAudioOutputBuffer::m_device

private

Definition at line 227 of file qaudiooutput_mac_p.cpp.

Referenced by fillBuffer(), setPrefetchDevice(), and startFillTimer().

◆ m_deviceError

bool QtMultimediaInternal::QAudioOutputBuffer::m_deviceError

private

Definition at line 223 of file qaudiooutput_mac_p.cpp.

Referenced by fillBuffer(), readFrames(), and reset().

◆ m_fillTimer

QTimer* QtMultimediaInternal::QAudioOutputBuffer::m_fillTimer

private

Definition at line 228 of file qaudiooutput_mac_p.cpp.

Referenced by fillBuffer(), QAudioOutputBuffer(), startFillTimer(), and stopFillTimer().

◆ m_maxPeriodSize

int QtMultimediaInternal::QAudioOutputBuffer::m_maxPeriodSize

private

Definition at line 224 of file qaudiooutput_mac_p.cpp.

Referenced by fillBuffer(), QAudioOutputBuffer(), and startFillTimer().

◆ m_periodTime

int QtMultimediaInternal::QAudioOutputBuffer::m_periodTime

private

Definition at line 226 of file qaudiooutput_mac_p.cpp.

Referenced by QAudioOutputBuffer(), and startFillTimer().

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

/src/multimedia/audio/qaudiooutput_mac_p.cpp

Signals

Public Functions

Private Slots

Properties

Additional Inherited Members

Detailed Description

Constructors and Destructors

◆ QAudioOutputBuffer()

◆ ~QAudioOutputBuffer()

Functions

◆ available()

◆ fillBuffer

◆ readFrames()

◆ readyRead

◆ reset()

◆ setPrefetchDevice()

◆ startFillTimer()

◆ stopFillTimer()

◆ writeBytes()

Properties

◆ m_buffer

◆ m_bytesPerFrame

◆ m_device

◆ m_deviceError

◆ m_fillTimer

◆ m_maxPeriodSize

◆ m_periodTime