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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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QWasmVideoOutput Class Reference

#include <qwasmvideooutput_p.h>

+ Inheritance diagram for QWasmVideoOutput:
+ Collaboration diagram for QWasmVideoOutput:

Public Types

enum  WasmVideoMode { VideoOutput , Camera }
 

Signals

void readyChanged (bool)
 
void bufferingChanged (qint32 percent)
 
void errorOccured (qint32 code, const QString &message)
 
void stateChanged (QWasmMediaPlayer::QWasmMediaPlayerState newState)
 
void progressChanged (qint32 position)
 
void durationChanged (qint64 duration)
 
void statusChanged (QMediaPlayer::MediaStatus status)
 
void sizeChange (qint32 width, qint32 height)
 
void metaDataLoaded ()
 
- 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

 QWasmVideoOutput (QObject *parent=nullptr)
 
void setVideoSize (const QSize &)
 
void start ()
 
void stop ()
 
void reset ()
 
void pause ()
 
void setSurface (QVideoSink *surface)
 
emscripten::val surfaceElement ()
 
bool isReady () const
 
void setSource (const QUrl &url)
 
void setSource (QIODevice *stream)
 
void setVolume (qreal volume)
 
void setMuted (bool muted)
 
qint64 getCurrentPosition ()
 
void seekTo (qint64 position)
 
bool isVideoSeekable ()
 
void setPlaybackRate (qreal rate)
 
qreal playbackRate ()
 
qint64 getDuration ()
 
void newFrame (const QVideoFrame &newFrame)
 
void createVideoElement (const std::string &id)
 
void createOffscreenElement (const QSize &offscreenSize)
 
void doElementCallbacks ()
 
void updateVideoElementGeometry (const QRect &windowGeometry)
 
void updateVideoElementSource (const QString &src)
 
void addCameraSourceElement (const std::string &id)
 
void removeSourceElement ()
 
void setVideoMode (QWasmVideoOutput::WasmVideoMode mode)
 
void setHasAudio (bool needsAudio)
 
bool hasCapability (const QString &cap)
 
emscripten::val getDeviceCapabilities ()
 
bool setDeviceSetting (const std::string &key, emscripten::val value)
 
bool isCameraReady ()
 
void videoFrameTimerCallback ()
 
emscripten::val currentVideoElement ()
 
- 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.
 

Static Public Member Functions

static void videoFrameCallback (emscripten::val now, emscripten::val metadata)
 
- 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)
 

Public Attributes

QVideoSinkm_wasmSink = nullptr
 

Additional Inherited Members

- Public Slots inherited from QObject
void deleteLater ()
 \threadsafe
 
- 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 35 of file qwasmvideooutput_p.h.

Member Enumeration Documentation

◆ WasmVideoMode

Enumerator
VideoOutput 
Camera 

Definition at line 39 of file qwasmvideooutput_p.h.

Constructor & Destructor Documentation

◆ QWasmVideoOutput()

QWasmVideoOutput::QWasmVideoOutput ( QObject * parent = nullptr)
explicit

Member Function Documentation

◆ addCameraSourceElement()

void QWasmVideoOutput::addCameraSourceElement ( const std::string & id)

Definition at line 258 of file qwasmvideooutput.cpp.

References emit, error, errorOccured(), QString::fromStdString(), qstdweb::Promise::make(), qCDebug, QStringLiteral, qWarning, QMediaPlayer::ResourceError, start(), and qstdweb::PromiseCallbacks::thenFunc.

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◆ bufferingChanged

void QWasmVideoOutput::bufferingChanged ( qint32 percent)
signal

Referenced by doElementCallbacks().

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◆ createOffscreenElement()

void QWasmVideoOutput::createOffscreenElement ( const QSize & offscreenSize)

Definition at line 457 of file qwasmvideooutput.cpp.

References m_videoSurfaceId, Q_FUNC_INFO, and qCDebug.

Referenced by QWasmCamera::setCamera().

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◆ createVideoElement()

void QWasmVideoOutput::createVideoElement ( const std::string & id)

Definition at line 400 of file qwasmvideooutput.cpp.

References Camera, QString::isEmpty(), m_videoSurfaceId, Q_FUNC_INFO, qCDebug, set, QString::toStdString(), and updateVideoElementSource().

Referenced by QWasmCamera::setCamera().

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◆ currentVideoElement()

emscripten::val QWasmVideoOutput::currentVideoElement ( )
inline

Definition at line 90 of file qwasmvideooutput_p.h.

Referenced by QWasmMediaPlayer::setVideoSink().

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◆ doElementCallbacks()

◆ durationChanged

void QWasmVideoOutput::durationChanged ( qint64 duration)
signal

Referenced by doElementCallbacks().

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◆ errorOccured

void QWasmVideoOutput::errorOccured ( qint32 code,
const QString & message )
signal

Referenced by addCameraSourceElement(), doElementCallbacks(), getDeviceCapabilities(), isVideoSeekable(), pause(), setMuted(), setSource(), start(), and stop().

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◆ getCurrentPosition()

qint64 QWasmVideoOutput::getCurrentPosition ( )

Definition at line 352 of file qwasmvideooutput.cpp.

Referenced by QWasmMediaPlayer::position().

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◆ getDeviceCapabilities()

emscripten::val QWasmVideoOutput::getDeviceCapabilities ( )

Definition at line 1012 of file qwasmvideooutput.cpp.

References emit, errorOccured(), QStringLiteral, and QMediaPlayer::ResourceError.

Referenced by QWasmCamera::isExposureModeSupported(), QWasmCamera::isFocusModeSupported(), QWasmCamera::isoSensitivity(), QWasmCamera::isTorchModeSupported(), QWasmCamera::isWhiteBalanceModeSupported(), QWasmCamera::setColorTemperature(), QWasmCamera::setExposureCompensation(), QWasmCamera::setManualExposureTime(), and QWasmCamera::setManualIsoSensitivity().

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◆ getDuration()

qint64 QWasmVideoOutput::getDuration ( )

Definition at line 784 of file qwasmvideooutput.cpp.

Referenced by QWasmMediaPlayer::duration().

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◆ hasCapability()

bool QWasmVideoOutput::hasCapability ( const QString & cap)

◆ isCameraReady()

bool QWasmVideoOutput::isCameraReady ( )
inline

Definition at line 83 of file qwasmvideooutput_p.h.

◆ isReady()

bool QWasmVideoOutput::isReady ( ) const

Definition at line 211 of file qwasmvideooutput.cpp.

◆ isVideoSeekable()

bool QWasmVideoOutput::isVideoSeekable ( )

Definition at line 381 of file qwasmvideooutput.cpp.

References emit, errorOccured(), qFuzzyCompare(), QStringLiteral, and QMediaPlayer::ResourceError.

Referenced by QWasmMediaPlayer::isSeekable(), and seekTo().

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◆ metaDataLoaded

void QWasmVideoOutput::metaDataLoaded ( )
signal

Referenced by doElementCallbacks().

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◆ newFrame()

void QWasmVideoOutput::newFrame ( const QVideoFrame & newFrame)

Definition at line 794 of file qwasmvideooutput.cpp.

References frame, m_wasmSink, and QVideoSink::setVideoFrame().

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◆ pause()

void QWasmVideoOutput::pause ( )

Definition at line 171 of file qwasmvideooutput.cpp.

References emit, errorOccured(), Q_FUNC_INFO, qCDebug, QStringLiteral, and QMediaPlayer::ResourceError.

Referenced by QWasmMediaPlayer::pause(), and QWasmCamera::setActive().

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◆ playbackRate()

qreal QWasmVideoOutput::playbackRate ( )

Definition at line 804 of file qwasmvideooutput.cpp.

Referenced by QWasmMediaPlayer::playbackRate().

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◆ progressChanged

void QWasmVideoOutput::progressChanged ( qint32 position)
signal

Referenced by doElementCallbacks().

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◆ readyChanged

void QWasmVideoOutput::readyChanged ( bool )
signal

Referenced by doElementCallbacks().

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◆ removeSourceElement()

void QWasmVideoOutput::removeSourceElement ( )

◆ reset()

void QWasmVideoOutput::reset ( )

Definition at line 185 of file qwasmvideooutput.cpp.

References m_wasmSink, QVideoSink::platformVideoSink(), and QPlatformVideoSink::setVideoFrame().

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◆ seekTo()

void QWasmVideoOutput::seekTo ( qint64 position)

Definition at line 359 of file qwasmvideooutput.cpp.

References isVideoSeekable(), and qCDebug.

Referenced by QWasmMediaPlayer::setPosition().

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◆ setDeviceSetting()

bool QWasmVideoOutput::setDeviceSetting ( const std::string & key,
emscripten::val value )

Definition at line 1041 of file qwasmvideooutput.cpp.

Referenced by QWasmCamera::setColorTemperature(), QWasmCamera::setExposureCompensation(), QWasmCamera::setExposureMode(), QWasmCamera::setFocusMode(), QWasmCamera::setManualExposureTime(), QWasmCamera::setManualIsoSensitivity(), QWasmCamera::setTorchMode(), and QWasmCamera::setWhiteBalanceMode().

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◆ setHasAudio()

void QWasmVideoOutput::setHasAudio ( bool needsAudio)
inline

Definition at line 78 of file qwasmvideooutput_p.h.

◆ setMuted()

void QWasmVideoOutput::setMuted ( bool muted)

Definition at line 342 of file qwasmvideooutput.cpp.

References emit, errorOccured(), QStringLiteral, and QMediaPlayer::ResourceError.

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◆ setPlaybackRate()

void QWasmVideoOutput::setPlaybackRate ( qreal rate)

Definition at line 799 of file qwasmvideooutput.cpp.

Referenced by QWasmMediaPlayer::setPlaybackRate().

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◆ setSource() [1/2]

void QWasmVideoOutput::setSource ( const QUrl & url)

Definition at line 225 of file qwasmvideooutput.cpp.

References QUrl::isEmpty(), QUrl::isLocalFile(), Q_FUNC_INFO, qCDebug, qWarning, QIODeviceBase::ReadOnly, setSource(), stop(), QUrl::toLocalFile(), QUrl::toString(), updateVideoElementSource(), and url.

Referenced by QWasmMediaPlayer::setMedia(), and setSource().

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◆ setSource() [2/2]

void QWasmVideoOutput::setSource ( QIODevice * stream)

Definition at line 305 of file qwasmvideooutput.cpp.

References qstdweb::Blob::copyFrom(), db, emit, errorOccured(), QString::fromStdString(), mime, QMimeDatabase::mimeTypeForData(), QStringLiteral, qWarning, QMediaPlayer::ResourceError, qstdweb::window(), and window().

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◆ setSurface()

void QWasmVideoOutput::setSurface ( QVideoSink * surface)

Definition at line 201 of file qwasmvideooutput.cpp.

References m_wasmSink, and qWarning.

Referenced by QWasmCamera::setActive(), and QWasmMediaPlayer::setVideoSink().

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◆ setVideoMode()

void QWasmVideoOutput::setVideoMode ( QWasmVideoOutput::WasmVideoMode mode)

Definition at line 76 of file qwasmvideooutput.cpp.

Referenced by QWasmCamera::setCamera().

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◆ setVideoSize()

void QWasmVideoOutput::setVideoSize ( const QSize & newSize)

Definition at line 67 of file qwasmvideooutput.cpp.

References QSize::height(), updateVideoElementGeometry(), and QSize::width().

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◆ setVolume()

void QWasmVideoOutput::setVolume ( qreal volume)

Definition at line 336 of file qwasmvideooutput.cpp.

References qBound().

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◆ sizeChange

void QWasmVideoOutput::sizeChange ( qint32 width,
qint32 height )
signal

Referenced by doElementCallbacks().

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◆ start()

void QWasmVideoOutput::start ( )

Definition at line 81 of file qwasmvideooutput.cpp.

References Camera, emit, errorOccured(), QString::isEmpty(), m_wasmSink, Q_FUNC_INFO, qCDebug, QStringLiteral, QMediaPlayer::ResourceError, updateVideoElementGeometry(), videoFrameTimerCallback(), and VideoOutput.

Referenced by addCameraSourceElement(), QWasmMediaPlayer::play(), and QWasmCamera::setActive().

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◆ stateChanged

void QWasmVideoOutput::stateChanged ( QWasmMediaPlayer::QWasmMediaPlayerState newState)
signal

Referenced by doElementCallbacks().

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◆ statusChanged

void QWasmVideoOutput::statusChanged ( QMediaPlayer::MediaStatus status)
signal

Referenced by doElementCallbacks().

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◆ stop()

void QWasmVideoOutput::stop ( )

Definition at line 152 of file qwasmvideooutput.cpp.

References emit, errorOccured(), Q_FUNC_INFO, qCDebug, QStringLiteral, and QMediaPlayer::ResourceError.

Referenced by doElementCallbacks(), setSource(), and QWasmMediaPlayer::stop().

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◆ surfaceElement()

emscripten::val QWasmVideoOutput::surfaceElement ( )

Definition at line 196 of file qwasmvideooutput.cpp.

◆ updateVideoElementGeometry()

void QWasmVideoOutput::updateVideoElementGeometry ( const QRect & windowGeometry)

Definition at line 765 of file qwasmvideooutput.cpp.

References arg, QRect::height(), QRect::left(), Q_FUNC_INFO, qCDebug, QRect::size(), QRect::top(), QRect::topLeft(), and QRect::width().

Referenced by doElementCallbacks(), QWasmCamera::setCamera(), setVideoSize(), and start().

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◆ updateVideoElementSource()

void QWasmVideoOutput::updateVideoElementSource ( const QString & src)

Definition at line 252 of file qwasmvideooutput.cpp.

Referenced by createVideoElement(), and setSource().

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◆ videoFrameCallback()

void QWasmVideoOutput::videoFrameCallback ( emscripten::val now,
emscripten::val metadata )
static

Definition at line 878 of file qwasmvideooutput.cpp.

References error, QVideoFrameFormat::Format_Invalid, frameSize(), QVideoFrameFormat::frameWidth(), QString::fromStdString(), m_videoSurfaceId, qstdweb::Promise::make(), now, QVideoFrameFormat::pixelFormat(), Q_FUNC_INFO, Q_UNUSED, qCDebug, qWarning, QVideoTextureHelper::TextureDescription::strideForWidth(), QVideoTextureHelper::textureDescription(), and qstdweb::PromiseCallbacks::thenFunc.

Referenced by EMSCRIPTEN_BINDINGS().

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◆ videoFrameTimerCallback()

void QWasmVideoOutput::videoFrameTimerCallback ( )

Definition at line 962 of file qwasmvideooutput.cpp.

References context, frame, m_videoSurfaceId, and Q_UNUSED.

Referenced by doElementCallbacks(), and start().

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Member Data Documentation

◆ m_wasmSink

QVideoSink* QWasmVideoOutput::m_wasmSink = nullptr

Definition at line 88 of file qwasmvideooutput_p.h.

Referenced by newFrame(), reset(), setSurface(), and start().


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