Inheritance diagram for QtMultimediaInternal::QAudioInputBuffer:

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

void	flush (bool all=false)

	QAudioInputBuffer (int bufferSize, int maxPeriodSize, AudioStreamBasicDescription const &inputFormat, AudioStreamBasicDescription const &outputFormat, QObject *parent)

qint64	readBytes (char *data, qint64 len)

qint64	renderFromDevice (AudioUnit audioUnit, AudioUnitRenderActionFlags ioActionFlags, const AudioTimeStamp inTimeStamp, UInt32 inBusNumber, UInt32 inNumberFrames)

void	reset ()

void	setFlushDevice (QIODevice *device)

void	startFlushTimer ()

void	stopFlushTimer ()

int	used () const

	~QAudioInputBuffer ()

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	flushBuffer ()

Static Private Functions
static OSStatus	converterCallback (AudioConverterRef inAudioConverter, UInt32 ioNumberDataPackets, AudioBufferList ioData, AudioStreamPacketDescription *outDataPacketDescription, void inUserData)

Properties
AudioConverterRef	m_audioConverter

QAudioRingBuffer *	m_buffer

QIODevice *	m_device

bool	m_deviceError

QTimer *	m_flushTimer

QAudioBufferList *	m_inputBufferList

AudioStreamBasicDescription	m_inputFormat

int	m_maxPeriodSize

AudioStreamBasicDescription	m_outputFormat

int	m_periodTime

Static Private Attributes
static const OSStatus	as_empty = 'qtem'

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 224 of file qaudioinput_mac_p.cpp.

Constructors and Destructors

◆ QAudioInputBuffer()

QtMultimediaInternal::QAudioInputBuffer::QAudioInputBuffer	(	int	bufferSize,
		int	maxPeriodSize,
		AudioStreamBasicDescription const &	inputFormat,
		AudioStreamBasicDescription const &	outputFormat,
		QObject *	parent
	)

inline

Definition at line 229 of file qaudioinput_mac_p.cpp.

                                         :
         QObject(parent),
         m_deviceError(false),
         m_audioConverter(0),
         m_inputFormat(inputFormat),
         m_outputFormat(outputFormat)
     {
         m_maxPeriodSize = maxPeriodSize;
         m_periodTime = m_maxPeriodSize / m_outputFormat.mBytesPerFrame * 1000 / m_outputFormat.mSampleRate;
         m_buffer = new QAudioRingBuffer(bufferSize + (bufferSize % maxPeriodSize == 0 ? 0 : maxPeriodSize - (bufferSize % maxPeriodSize)));
         m_inputBufferList = new QAudioBufferList(m_inputFormat);
 
         m_flushTimer = new QTimer(this);
         connect(m_flushTimer, SIGNAL(timeout()), SLOT(flushBuffer()));
 
         if (toQAudioFormat(inputFormat) != toQAudioFormat(outputFormat)) {
             if (AudioConverterNew(&m_inputFormat, &m_outputFormat, &m_audioConverter) != noErr) {
                 qWarning() << "QAudioInput: Unable to create an Audio Converter";
                 m_audioConverter = 0;
             }
         }
     }

◆ ~QAudioInputBuffer()

QtMultimediaInternal::QAudioInputBuffer::~QAudioInputBuffer ( )

inline

Definition at line 256 of file qaudioinput_mac_p.cpp.

     {
         delete m_buffer;
     }

Functions

◆ available()

int QtMultimediaInternal::QAudioInputBuffer::available ( ) const

inline

Definition at line 421 of file qaudioinput_mac_p.cpp.

     {
         return m_buffer->free();
     }

◆ converterCallback()

static OSStatus QtMultimediaInternal::QAudioInputBuffer::converterCallback	(	AudioConverterRef	inAudioConverter,
		UInt32 *	ioNumberDataPackets,
		AudioBufferList *	ioData,
		AudioStreamPacketDescription **	outDataPacketDescription,
		void *	inUserData
	)

inlinestaticprivate

Definition at line 455 of file qaudioinput_mac_p.cpp.

     {
         Q_UNUSED(inAudioConverter);
         Q_UNUSED(outDataPacketDescription);
 
         QAudioPacketFeeder* feeder = static_cast<QAudioPacketFeeder*>(inUserData);
 
         if (!feeder->feed(*ioData, *ioNumberDataPackets))
             return as_empty;
 
         return noErr;
     }

◆ flush()

void QtMultimediaInternal::QAudioInputBuffer::flush ( bool all = false )

inline

Definition at line 380 of file qaudioinput_mac_p.cpp.

     {
         if (m_device == 0)
             return;
 
         const int used = m_buffer->used();
         const int readSize = all ? used : used - (used % m_maxPeriodSize);
 
         if (readSize > 0) {
             bool    wecan = true;
             int     flushed = 0;
 
             while (!m_deviceError && wecan && flushed < readSize) {
                 QAudioRingBuffer::Region region = m_buffer->acquireReadRegion(readSize - flushed);
 
                 if (region.second > 0) {
                     int bytesWritten = m_device->write(region.first, region.second);
                     if (bytesWritten < 0) {
                         stopFlushTimer();
                         m_deviceError = true;
                     }
                     else {
                         region.second = bytesWritten;
                         flushed += bytesWritten;
                         wecan = bytesWritten != 0;
                     }
                 }
                 else
                     wecan = false;
 
                 m_buffer->releaseReadRegion(region);
             }
         }
     }

◆ flushBuffer

void QtMultimediaInternal::QAudioInputBuffer::flushBuffer ( )

inlineprivateslot

Definition at line 435 of file qaudioinput_mac_p.cpp.

     {
         flush();
     }

◆ readBytes()

qint64 QtMultimediaInternal::QAudioInputBuffer::readBytes	(	char *	data,
		qint64	len
	)

inline

Definition at line 340 of file qaudioinput_mac_p.cpp.

     {
         bool    wecan = true;
         qint64  bytesCopied = 0;
 
         len -= len % m_maxPeriodSize;
         while (wecan && bytesCopied < len) {
             QAudioRingBuffer::Region region = m_buffer->acquireReadRegion(len - bytesCopied);
 
             if (region.second > 0) {
                 memcpy(data + bytesCopied, region.first, region.second);
                 bytesCopied += region.second;
             }
             else
                 wecan = false;
 
             m_buffer->releaseReadRegion(region);
         }
 
         return bytesCopied;
     }

◆ readyRead

void QtMultimediaInternal::QAudioInputBuffer::readyRead ( )

signal

◆ renderFromDevice()

qint64 QtMultimediaInternal::QAudioInputBuffer::renderFromDevice	(	AudioUnit	audioUnit,
		AudioUnitRenderActionFlags *	ioActionFlags,
		const AudioTimeStamp *	inTimeStamp,
		UInt32	inBusNumber,
		UInt32	inNumberFrames
	)

inline

Definition at line 261 of file qaudioinput_mac_p.cpp.

     {
         const bool  pullMode = m_device == 0;
 
         OSStatus    err;
         qint64      framesRendered = 0;
 
         m_inputBufferList->reset();
         err = AudioUnitRender(audioUnit,
                                 ioActionFlags,
                                 inTimeStamp,
                                 inBusNumber,
                                 inNumberFrames,
                                 m_inputBufferList->audioBufferList());
 
         if (m_audioConverter != 0) {
             QAudioPacketFeeder  feeder(m_inputBufferList);
 
             int     copied = 0;
             const int available = m_buffer->free();
 
             while (err == noErr && !feeder.empty()) {
                 QAudioRingBuffer::Region region = m_buffer->acquireWriteRegion(available);
 
                 if (region.second == 0)
                     break;
 
                 AudioBufferList     output;
                 output.mNumberBuffers = 1;
                 output.mBuffers[0].mNumberChannels = 1;
                 output.mBuffers[0].mDataByteSize = region.second;
                 output.mBuffers[0].mData = region.first;
 
                 UInt32  packetSize = region.second / m_outputFormat.mBytesPerPacket;
                 err = AudioConverterFillComplexBuffer(m_audioConverter,
                                                       converterCallback,
                                                       &feeder,
                                                       &packetSize,
                                                       &output,
                                                       0);
                 region.second = output.mBuffers[0].mDataByteSize;
                 copied += region.second;
 
                 m_buffer->releaseWriteRegion(region);
             }
 
             framesRendered += copied / m_outputFormat.mBytesPerFrame;
         }
         else {
             const int available = m_inputBufferList->bufferSize();
             bool    wecan = true;
             int     copied = 0;
 
             while (wecan && copied < available) {
                 QAudioRingBuffer::Region region = m_buffer->acquireWriteRegion(available - copied);
 
                 if (region.second > 0) {
                     memcpy(region.first, m_inputBufferList->data() + copied, region.second);
                     copied += region.second;
                 }
                 else
                     wecan = false;
 
                 m_buffer->releaseWriteRegion(region);
             }
 
             framesRendered = copied / m_outputFormat.mBytesPerFrame;
         }
 
         if (pullMode && framesRendered > 0)
             emit readyRead();
 
         return framesRendered;
     }

◆ reset()

void QtMultimediaInternal::QAudioInputBuffer::reset ( )

inline

Definition at line 415 of file qaudioinput_mac_p.cpp.

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

◆ setFlushDevice()

void QtMultimediaInternal::QAudioInputBuffer::setFlushDevice ( QIODevice * device )

inline

Definition at line 362 of file qaudioinput_mac_p.cpp.

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

◆ startFlushTimer()

void QtMultimediaInternal::QAudioInputBuffer::startFlushTimer ( )

inline

Definition at line 368 of file qaudioinput_mac_p.cpp.

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

◆ stopFlushTimer()

void QtMultimediaInternal::QAudioInputBuffer::stopFlushTimer ( )

inline

Definition at line 375 of file qaudioinput_mac_p.cpp.

     {
         m_flushTimer->stop();
     }

◆ used()

int QtMultimediaInternal::QAudioInputBuffer::used ( ) const

inline

Definition at line 426 of file qaudioinput_mac_p.cpp.

     {
         return m_buffer->used();
     }

Properties

◆ as_empty

const OSStatus QtMultimediaInternal::QAudioInputBuffer::as_empty = 'qtem'

staticprivate

Definition at line 452 of file qaudioinput_mac_p.cpp.

◆ m_audioConverter

AudioConverterRef QtMultimediaInternal::QAudioInputBuffer::m_audioConverter

private

Definition at line 448 of file qaudioinput_mac_p.cpp.

◆ m_buffer

QAudioRingBuffer* QtMultimediaInternal::QAudioInputBuffer::m_buffer

private

Definition at line 446 of file qaudioinput_mac_p.cpp.

◆ m_device

QIODevice* QtMultimediaInternal::QAudioInputBuffer::m_device

private

Definition at line 444 of file qaudioinput_mac_p.cpp.

◆ m_deviceError

bool QtMultimediaInternal::QAudioInputBuffer::m_deviceError

private

Definition at line 441 of file qaudioinput_mac_p.cpp.

◆ m_flushTimer

QTimer* QtMultimediaInternal::QAudioInputBuffer::m_flushTimer

private

Definition at line 445 of file qaudioinput_mac_p.cpp.

◆ m_inputBufferList

QAudioBufferList* QtMultimediaInternal::QAudioInputBuffer::m_inputBufferList

private

Definition at line 447 of file qaudioinput_mac_p.cpp.

◆ m_inputFormat

AudioStreamBasicDescription QtMultimediaInternal::QAudioInputBuffer::m_inputFormat

private

Definition at line 449 of file qaudioinput_mac_p.cpp.

◆ m_maxPeriodSize

int QtMultimediaInternal::QAudioInputBuffer::m_maxPeriodSize

private

Definition at line 442 of file qaudioinput_mac_p.cpp.

◆ m_outputFormat

AudioStreamBasicDescription QtMultimediaInternal::QAudioInputBuffer::m_outputFormat

private

Definition at line 450 of file qaudioinput_mac_p.cpp.

◆ m_periodTime

int QtMultimediaInternal::QAudioInputBuffer::m_periodTime

private

Definition at line 443 of file qaudioinput_mac_p.cpp.

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

/src/multimedia/audio/qaudioinput_mac_p.cpp

Signals

Public Functions

Private Slots

Static Private Functions

Properties

Static Private Attributes

Additional Inherited Members

Detailed Description

Constructors and Destructors

◆ QAudioInputBuffer()

◆ ~QAudioInputBuffer()

Functions

◆ available()

◆ converterCallback()

◆ flush()

◆ flushBuffer

◆ readBytes()

◆ readyRead

◆ renderFromDevice()

◆ reset()

◆ setFlushDevice()

◆ startFlushTimer()

◆ stopFlushTimer()

◆ used()

Properties

◆ as_empty

◆ m_audioConverter

◆ m_buffer

◆ m_device

◆ m_deviceError

◆ m_flushTimer

◆ m_inputBufferList

◆ m_inputFormat

◆ m_maxPeriodSize

◆ m_outputFormat

◆ m_periodTime