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Internal/Contributor docs for the Qt SDK. Note: These are NOT official API docs; those are found at https://doc.qt.io/
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QFFmpeg::Renderer Class Referenceabstract

#include <qffmpegrenderer_p.h>

Inheritance diagram for QFFmpeg::Renderer:
Collaboration diagram for QFFmpeg::Renderer:

Classes

struct  RenderingResult

Public Types

using TimePoint = SteadyClock::time_point
Public Types inherited from QFFmpeg::PlaybackEngineObject
using TimePoint = std::chrono::steady_clock::time_point
using TimePointOpt = std::optional<TimePoint>
using Id = quint64

Public Slots

void onFinalFrameReceived ()
void render (Frame)
Public Slots inherited from QObject
void deleteLater ()
 \threadsafe

Signals

void frameProcessed (Frame)
void synchronized (Id id, TimePoint tp, TrackPosition pos)
void forceStepDone ()
void loopChanged (Id id, TrackPosition offset, int index)
Signals inherited from QFFmpeg::PlaybackEngineObject
void atEnd ()
void error (QMediaPlayer::Error, const QString &errorString)
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

 Renderer (const TimeController &tc)
void syncSoft (TimePoint tp, TrackPosition trackPos)
TrackPosition seekPosition () const
TrackPosition lastPosition () const
void setPlaybackRate (float rate)
void doForceStep ()
bool isStepForced () const
void start (const TimeController &tc)
Public Member Functions inherited from QFFmpeg::PlaybackEngineObject
 PlaybackEngineObject ()
 ~PlaybackEngineObject () override
bool isPaused () const
bool isAtEnd () const
void kill ()
void setPaused (bool isPaused)
Id id () const
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 isQmlObjectType () const
 Returns whether the object has been created by the QML engine or ownership has been explicitly set via QJSEngine::setObjectOwnership().
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.

Protected Member Functions

bool setForceStepDone ()
void onPauseChanged () override
bool canDoNextStep () const override
std::chrono::milliseconds timerInterval () const override
virtual void onPlaybackRateChanged ()
virtual RenderingResult renderInternal (Frame frame)=0
float playbackRate () const
std::chrono::microseconds frameDelay (const Frame &frame, TimePoint timePoint=SteadyClock::now()) const
void changeRendererTime (std::chrono::microseconds offset)
template<typename Output, typename ChangeHandler>
void setOutputInternal (QPointer< Output > &actual, Output *desired, ChangeHandler &&changeHandler)
Protected Member Functions inherited from QFFmpeg::PlaybackEngineObject
QTimertimer ()
void scheduleNextStep (bool allowDoImmediatelly=true)
void setAtEnd (bool isAtEnd)
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)

Private Member Functions

void doNextStep () override

Additional Inherited Members

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 Attributes inherited from QObject
QScopedPointer< QObjectDatad_ptr
Properties inherited from QObject
QString objectName
 the name of this object

Detailed Description

Definition at line 30 of file qffmpegrenderer_p.h.

Member Typedef Documentation

◆ TimePoint

using QFFmpeg::Renderer::TimePoint = SteadyClock::time_point

Definition at line 34 of file qffmpegrenderer_p.h.

Constructor & Destructor Documentation

◆ Renderer()

QFFmpeg::Renderer::Renderer ( const TimeController & tc)

Definition at line 13 of file qffmpegrenderer.cpp.

References Renderer().

Referenced by Renderer().

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Member Function Documentation

◆ canDoNextStep()

bool QFFmpeg::Renderer::canDoNextStep ( ) const
overrideprotectedvirtual

Reimplemented from QFFmpeg::PlaybackEngineObject.

Definition at line 106 of file qffmpegrenderer.cpp.

◆ changeRendererTime()

void QFFmpeg::Renderer::changeRendererTime ( std::chrono::microseconds offset)
protected

Definition at line 207 of file qffmpegrenderer.cpp.

◆ doForceStep()

void QFFmpeg::Renderer::doForceStep ( )

Definition at line 48 of file qffmpegrenderer.cpp.

◆ doNextStep()

void QFFmpeg::Renderer::doNextStep ( )
overrideprivatevirtual

Reimplemented from QFFmpeg::PlaybackEngineObject.

Definition at line 158 of file qffmpegrenderer.cpp.

References setForceStepDone().

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◆ forceStepDone

void QFFmpeg::Renderer::forceStepDone ( )
signal

◆ frameDelay()

std::chrono::microseconds QFFmpeg::Renderer::frameDelay ( const Frame & frame,
TimePoint timePoint = SteadyClock::now() ) const
protected

Definition at line 201 of file qffmpegrenderer.cpp.

◆ frameProcessed

void QFFmpeg::Renderer::frameProcessed ( Frame )
signal

◆ isStepForced()

bool QFFmpeg::Renderer::isStepForced ( ) const

Definition at line 64 of file qffmpegrenderer.cpp.

◆ lastPosition()

TrackPosition QFFmpeg::Renderer::lastPosition ( ) const

Definition at line 34 of file qffmpegrenderer.cpp.

◆ loopChanged

void QFFmpeg::Renderer::loopChanged ( Id id,
TrackPosition offset,
int index )
signal

◆ onFinalFrameReceived

void QFFmpeg::Renderer::onFinalFrameReceived ( )
slot

Definition at line 78 of file qffmpegrenderer.cpp.

◆ onPauseChanged()

void QFFmpeg::Renderer::onPauseChanged ( )
overrideprotectedvirtual

Reimplemented from QFFmpeg::PlaybackEngineObject.

Definition at line 100 of file qffmpegrenderer.cpp.

◆ onPlaybackRateChanged()

virtual void QFFmpeg::Renderer::onPlaybackRateChanged ( )
inlineprotectedvirtual

Reimplemented in QFFmpeg::AudioRenderer.

Definition at line 76 of file qffmpegrenderer_p.h.

◆ playbackRate()

float QFFmpeg::Renderer::playbackRate ( ) const
protected

Definition at line 117 of file qffmpegrenderer.cpp.

◆ render

void QFFmpeg::Renderer::render ( Frame frame)
slot

Definition at line 83 of file qffmpegrenderer.cpp.

◆ renderInternal()

virtual RenderingResult QFFmpeg::Renderer::renderInternal ( Frame frame)
protectedpure virtual

◆ seekPosition()

TrackPosition QFFmpeg::Renderer::seekPosition ( ) const

Definition at line 29 of file qffmpegrenderer.cpp.

◆ setForceStepDone()

bool QFFmpeg::Renderer::setForceStepDone ( )
protected

Definition at line 148 of file qffmpegrenderer.cpp.

Referenced by doNextStep().

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◆ setOutputInternal()

template<typename Output, typename ChangeHandler>
void QFFmpeg::Renderer::setOutputInternal ( QPointer< Output > & actual,
Output * desired,
ChangeHandler && changeHandler )
inlineprotected

Definition at line 94 of file qffmpegrenderer_p.h.

◆ setPlaybackRate()

void QFFmpeg::Renderer::setPlaybackRate ( float rate)

Definition at line 39 of file qffmpegrenderer.cpp.

◆ start()

void QFFmpeg::Renderer::start ( const TimeController & tc)

Definition at line 69 of file qffmpegrenderer.cpp.

◆ synchronized

void QFFmpeg::Renderer::synchronized ( Id id,
TimePoint tp,
TrackPosition pos )
signal

◆ syncSoft()

void QFFmpeg::Renderer::syncSoft ( TimePoint tp,
TrackPosition trackPos )

Definition at line 21 of file qffmpegrenderer.cpp.

◆ timerInterval()

std::chrono::milliseconds QFFmpeg::Renderer::timerInterval ( ) const
overrideprotectedvirtual

Reimplemented from QFFmpeg::PlaybackEngineObject.

Definition at line 122 of file qffmpegrenderer.cpp.


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