QGst Namespace Reference

Namespaces
namespace	Ui
namespace	Utils
namespace	Parse
Classes
class	Bin
	Wrapper class for GstBin. More...
class	Buffer
	Wrapper class for GstBuffer. More...
class	BufferList
	Wrapper class for GstBufferList. More...
class	BufferListIterator
	Wrapper class for GstBufferListIterator. More...
class	Bus
	Wrapper class for GstBus. More...
class	Caps
	Wrapper class for GstCaps. More...
interface	ChildProxy
	Wrapper class for GstChildProxy. More...
class	Clock
	Wrapper class for GstClock. More...
class	ClockTime
	A datatype to hold a time, measured in nanoseconds. More...
class	ColorBalanceChannel
	Wrapper class for GstColorBalanceChannel. More...
class	ColorBalance
	Wrapper class for GstColorBalance. More...
class	Element
	Wrapper class for GstElement. More...
class	ElementFactory
	Wrapper class for GstElementFactory. More...
class	Event
	Wrapper class for GstEvent. More...
class	FlushStartEvent
	Wrapper class for events of type QGst::FlushStartEvent. More...
class	FlushStopEvent
	Wrapper class for events of type QGst::FlushStopEvent. More...
class	EosEvent
	Wrapper class for events of type QGst::EosEvent. More...
class	NewSegmentEvent
	Wrapper class for events of type QGst::NewSegmentEvent. More...
class	TagEvent
	Wrapper class for events of type QGst::TagEvent. More...
class	BufferSizeEvent
	Wrapper class for events of type QGst::BufferSizeEvent. More...
class	SinkMessageEvent
	Wrapper class for events of type QGst::SinkMessageEvent. More...
class	QosEvent
	Wrapper class for events of type QGst::QosEvent. More...
class	SeekEvent
	Wrapper class for events of type QGst::SeekEvent. More...
class	NavigationEvent
	Wrapper class for events of type QGst::NavigationEvent. More...
class	LatencyEvent
	Wrapper class for events of type QGst::LatencyEvent. More...
class	StepEvent
	Wrapper class for events of type QGst::StepEvent. More...
class	GhostPad
	Wrapper class for GstGhostPad. More...
class	Message
	Wrapper class for GstMessage. More...
class	EosMessage
	Wrapper class for messages of type QGst::MessageEos. More...
class	ErrorMessage
	Wrapper class for messages of type QGst::MessageError. More...
class	WarningMessage
	Wrapper class for messages of type QGst::MessageWarning. More...
class	InfoMessage
	Wrapper class for messages of type QGst::MessageInfo. More...
class	TagMessage
	Wrapper class for messages of type QGst::MessageTag. More...
class	BufferingMessage
	Wrapper class for messages of type QGst::MessageBuffering. More...
class	StateChangedMessage
	Wrapper class for messages of type QGst::MessageStateChanged. More...
class	StepDoneMessage
	Wrapper class for messages of type QGst::MessageStepDone. More...
class	StreamStatusMessage
	Wrapper class for messages of type QGst::MessageStreamStatus. More...
class	ApplicationMessage
	Wrapper class for messages of type QGst::MessageApplication. More...
class	ElementMessage
	Wrapper class for messages of type QGst::MessageElement. More...
class	SegmentDoneMessage
	Wrapper class for messages of type QGst::MessageSegmentDone. More...
class	DurationMessage
	Wrapper class for messages of type QGst::MessageDuration. More...
class	LatencyMessage
	Wrapper class for messages of type QGst::MessageLatency. More...
class	AsyncDoneMessage
	Wrapper class for messages of type QGst::MessageAsyncDone. More...
class	RequestStateMessage
	Wrapper class for messages of type QGst::MessageRequestState. More...
class	StepStartMessage
	Wrapper class for messages of type QGst::MessageStepStart. More...
class	QosMessage
	Wrapper class for messages of type QGst::MessageQos. More...
class	MiniObject
	Wrapper class for GstMiniObject. More...
class	Object
	Wrapper class for GstObject. More...
class	Pad
	Wrapper class for GstPad. More...
class	Pipeline
	Wrapper class for GstPipeline. More...
class	PluginFeature
	Wrapper class for GstPluginFeature. More...
interface	PropertyProbe
	Wrapper class for GstPropertyProbe. More...
class	Query
	Wrapper class for GstQuery. More...
class	PositionQuery
	Wrapper class for queries of type QGst::PositionQuery. More...
class	DurationQuery
	Wrapper class for queries of type QGst::DurationQuery. More...
class	LatencyQuery
	Wrapper class for queries of type QGst::LatencyQuery. More...
class	SeekingQuery
	Wrapper class for queries of type QGst::SeekingQuery. More...
class	SegmentQuery
	Wrapper class for queries of type QGst::SegmentQuery. More...
class	ConvertQuery
	Wrapper class for queries of type QGst::ConvertQuery. More...
class	FormatsQuery
	Wrapper class for queries of type QGst::FormatsQuery. More...
class	BufferingQuery
	Wrapper class for queries of type QGst::BufferingQuery. More...
class	UriQuery
	Wrapper class for queries of type QGst::UriQuery. More...
class	StreamVolume
	Wrapper class for GstStreamVolume. More...
struct	Fourcc
	Helper structure for accessing Fourcc values. More...
struct	Fraction
	Helper structure for accessing Fraction values. More...
class	Structure
	Wrapper for GstStructure. More...
class	SharedStructure
	Helper for shared GstStructure instances. More...
class	TagList
	Wrapper class for GstTagList. More...
interface	UriHandler
	Wrapper class for GstURIHandler. More...
interface	VideoOrientation
	Wrapper class for GstVideoOrientation. More...
interface	XOverlay
	Wrapper class for GstXOverlay. More...
Typedefs
typedef QGlib::RefPointer< Bin >	BinPtr
typedef QGlib::RefPointer< Bus >	BusPtr
typedef QGlib::RefPointer< Caps >	CapsPtr
typedef QGlib::RefPointer < ChildProxy >	ChildProxyPtr
typedef QGlib::RefPointer< Clock >	ClockPtr
typedef QGlib::RefPointer < ColorBalanceChannel >	ColorBalanceChannelPtr
typedef QGlib::RefPointer < ColorBalance >	ColorBalancePtr
typedef QGlib::RefPointer < Element >	ElementPtr
typedef QGlib::RefPointer < ElementFactory >	ElementFactoryPtr
typedef QGlib::RefPointer < GhostPad >	GhostPadPtr
typedef QGlib::RefPointer < Message >	MessagePtr
typedef QGlib::RefPointer < EosMessage >	EosMessagePtr
typedef QGlib::RefPointer < ErrorMessage >	ErrorMessagePtr
typedef QGlib::RefPointer < WarningMessage >	WarningMessagePtr
typedef QGlib::RefPointer < InfoMessage >	InfoMessagePtr
typedef QGlib::RefPointer < TagMessage >	TagMessagePtr
typedef QGlib::RefPointer < BufferingMessage >	BufferingMessagePtr
typedef QGlib::RefPointer < StateChangedMessage >	StateChangedMessagePtr
typedef QGlib::RefPointer < StepDoneMessage >	StepDoneMessagePtr
typedef QGlib::RefPointer < StreamStatusMessage >	StreamStatusMessagePtr
typedef QGlib::RefPointer < ApplicationMessage >	ApplicationMessagePtr
typedef QGlib::RefPointer < ElementMessage >	ElementMessagePtr
typedef QGlib::RefPointer < SegmentDoneMessage >	SegmentDoneMessagePtr
typedef QGlib::RefPointer < DurationMessage >	DurationMessagePtr
typedef QGlib::RefPointer < LatencyMessage >	LatencyMessagePtr
typedef QGlib::RefPointer < AsyncDoneMessage >	AsyncDoneMessagePtr
typedef QGlib::RefPointer < RequestStateMessage >	RequestStateMessagePtr
typedef QGlib::RefPointer < StepStartMessage >	StepStartMessagePtr
typedef QGlib::RefPointer < QosMessage >	QosMessagePtr
typedef QGlib::RefPointer < MiniObject >	MiniObjectPtr
typedef QGlib::RefPointer< Object >	ObjectPtr
typedef QGlib::RefPointer< Pad >	PadPtr
typedef QGlib::RefPointer < Pipeline >	PipelinePtr
typedef QGlib::RefPointer < PluginFeature >	PluginFeaturePtr
typedef QGlib::RefPointer < PropertyProbe >	PropertyProbePtr
typedef QGlib::RefPointer< Query >	QueryPtr
typedef QGlib::RefPointer < PositionQuery >	PositionQueryPtr
typedef QGlib::RefPointer < DurationQuery >	DurationQueryPtr
typedef QGlib::RefPointer < LatencyQuery >	LatencyQueryPtr
typedef QGlib::RefPointer < SeekingQuery >	SeekingQueryPtr
typedef QGlib::RefPointer < SegmentQuery >	SegmentQueryPtr
typedef QGlib::RefPointer < ConvertQuery >	ConvertQueryPtr
typedef QGlib::RefPointer < FormatsQuery >	FormatsQueryPtr
typedef QGlib::RefPointer < BufferingQuery >	BufferingQueryPtr
typedef QGlib::RefPointer < UriQuery >	UriQueryPtr
typedef QGlib::RefPointer< Buffer >	BufferPtr
typedef QGlib::RefPointer < BufferList >	BufferListPtr
typedef QGlib::RefPointer< Event >	EventPtr
typedef QGlib::RefPointer < FlushStartEvent >	FlushStartEventPtr
typedef QGlib::RefPointer < FlushStopEvent >	FlushStopEventPtr
typedef QGlib::RefPointer < EosEvent >	EosEventPtr
typedef QGlib::RefPointer < NewSegmentEvent >	NewSegmentEventPtr
typedef QGlib::RefPointer < TagEvent >	TagEventPtr
typedef QGlib::RefPointer < BufferSizeEvent >	BufferSizeEventPtr
typedef QGlib::RefPointer < SinkMessageEvent >	SinkMessageEventPtr
typedef QGlib::RefPointer < QosEvent >	QosEventPtr
typedef QGlib::RefPointer < SeekEvent >	SeekEventPtr
typedef QGlib::RefPointer < NavigationEvent >	NavigationEventPtr
typedef QGlib::RefPointer < LatencyEvent >	LatencyEventPtr
typedef QGlib::RefPointer < StepEvent >	StepEventPtr
typedef QGlib::RefPointer < StreamVolume >	StreamVolumePtr
typedef QSharedPointer < SharedStructure >	StructurePtr
typedef QGlib::RefPointer < UriHandler >	UriHandlerPtr
typedef QGlib::RefPointer < VideoOrientation >	VideoOrientationPtr
typedef QGlib::RefPointer < XOverlay >	XOverlayPtr
typedef Private::Range< int >	IntRange
typedef Private::Range< qint64 >	Int64Range
typedef Private::Range< double >	DoubleRange
typedef Private::Range< Fraction >	FractionRange
Enumerations
enum	MiniObjectFlag { MiniObjectFlagReadonly = (1<<0), MiniObjectFlagLast = (1<<4) }
enum	ObjectFlag { ObjectDisposing = (1<<0), ObjectFloating = (1<<1), ObjectFlagLast = (1<<4) }
enum	State {   StateVoidPending = 0, StateNull = 1, StateReady = 2, StatePaused = 3,   StatePlaying = 4 }
enum	StateChange {   StateChangeNullToReady = (StateNull<<3) | StateReady, StateChangeReadyToPaused = (StateReady<<3) | StatePaused, StateChangePausedToPlaying = (StatePaused<<3) | StatePlaying, StateChangePlayingToPaused = (StatePlaying<<3) | StatePaused,   StateChangePausedToReady = (StatePaused<<3) | StateReady, StateChangeReadyToNull = (StateReady<<3) | StateNull }
enum	StateChangeReturn { StateChangeFailure = 0, StateChangeSuccess = 1, StateChangeAsync = 2, StateChangeNoPreroll = 3 }
enum	PadDirection { PadUnknown, PadSrc, PadSink }
enum	PadFlag {   PadBlocked = (ObjectFlagLast << 0), PadFlushing = (ObjectFlagLast << 1), PadInGetCaps = (ObjectFlagLast << 2), PadInSetCaps = (ObjectFlagLast << 3),   PadBlocking = (ObjectFlagLast << 4), PadFlagLast = (ObjectFlagLast << 8) }
enum	PadLinkReturn {   PadLinkOk = 0, PadLinkWrongHierarchy = -1, PadLinkWasLinked = -2, PadLinkWrongDirection = -3,   PadLinkNoFormat = -4, PadLinkNoSched = -5, PadLinkRefused = -6 }
enum	FlowReturn {   FlowCustomSuccess = 100, FlowResend = 1, FlowOk = 0, FlowNotLinked = -1,   FlowWrongState = -2, FlowUnexpected = -3, FlowNotNegotiated = -4, FlowError = -5,   FlowNotSupported = -6, FlowCustomError = -100 }
enum	ActivateMode { ActivateNone, ActivatePush, ActivatePull }
enum	Rank { RankNone = 0, RankMarginal = 64, RankSecondary = 128, RankPrimary = 256 }
enum	MessageType {   MessageUnknown = 0, MessageEos = (1 << 0), MessageError = (1 << 1), MessageWarning = (1 << 2),   MessageInfo = (1 << 3), MessageTag = (1 << 4), MessageBuffering = (1 << 5), MessageStateChanged = (1 << 6),   MessageStateDirty = (1 << 7), MessageStepDone = (1 << 8), MessageClockProvide = (1 << 9), MessageClockLost = (1 << 10),   MessageNewClock = (1 << 11), MessageStructureChange = (1 << 12), MessageStreamStatus = (1 << 13), MessageApplication = (1 << 14),   MessageElement = (1 << 15), MessageSegmentStart = (1 << 16), MessageSegmentDone = (1 << 17), MessageDuration = (1 << 18),   MessageLatency = (1 << 19), MessageAsyncStart = (1 << 20), MessageAsyncDone = (1 << 21), MessageRequestState = (1 << 22),   MessageStepStart = (1 << 23), MessageQos = (1 << 24), MessageAny = ~0 }
enum	ParseError {   ParseErrorSyntax, ParseErrorNoSuchElement, ParseErrorNoSuchProperty, ParseErrorLink,   ParseErrorCouldNotSetProperty, ParseErrorEmptyBin, ParseErrorEmpty }
enum	UriType { UriUnknown, UriSink, UriSrc }
enum	BufferingMode { BufferingStream, BufferingDownload, BufferingTimeshift, BufferingLive }
enum	Format {   FormatUndefined, FormatDefault, FormatBytes, FormatTime,   FormatBuffers, FormatPercent }
enum	StreamStatusType {   StreamStatusTypeCreate = 0, StreamStatusTypeEnter = 1, StreamStatusTypeLeave = 2, StreamStatusTypeDestroy = 3,   StreamStatusTypeStart = 8, StreamStatusTypePause = 9, StreamStatusTypeStop = 10 }
enum	StreamVolumeFormat { StreamVolumeFormatLinear, StreamVolumeFormatCubic, StreamVolumeFormatDb }
enum	ColorBalanceType { ColorBalanceHardware, ColorBalanceSoftware }
enum	QueryType {   QueryNone = 0, QueryPosition, QueryDuration, QueryLatency,   QueryJitter, QueryRate, QuerySeeking, QuerySegment,   QueryConvert, QueryFormats, QueryBuffering, QueryCustom,   QueryUri }
enum	BufferFlag {   BufferFlagReadOnly = MiniObjectFlagReadonly, BufferFlagPreroll = (MiniObjectFlagLast << 0), BufferFlagDiscont = (MiniObjectFlagLast << 1), BufferFlagInCaps = (MiniObjectFlagLast << 2),   BufferFlagGap = (MiniObjectFlagLast << 3), BufferFlagDeltaUnit = (MiniObjectFlagLast << 4), BufferFlagMedia1 = (MiniObjectFlagLast << 5), BufferFlagMedia2 = (MiniObjectFlagLast << 6),   BufferFlagMedia3 = (MiniObjectFlagLast << 7), BufferFlagLast = (MiniObjectFlagLast << 8) }
enum	EventType {   EventUnknown = (0 << 4), EventFlushStart = (1 << 4) | EventTypeBoth, EventFlushStop = (2 << 4) | EventTypeBoth | EventTypeSerialized, EventEos = (5 << 4) | EventTypeDownstream | EventTypeSerialized,   EventNewSegment = (6 << 4) | EventTypeDownstream | EventTypeSerialized, EventTag = (7 << 4) | EventTypeDownstream | EventTypeSerialized, EventBufferSize = (8 << 4) | EventTypeDownstream | EventTypeSerialized, EventSinkMessage = (9 << 4) | EventTypeDownstream | EventTypeSerialized,   EventQos = (15 << 4) | EventTypeUpstream, EventSeek = (16 << 4) | EventTypeUpstream, EventNavigation = (17 << 4) | EventTypeUpstream, EventLatency = (18 << 4) | EventTypeUpstream,   EventStep = (19 << 4) | EventTypeUpstream, EventCustomUpstream = (32 << 4) | EventTypeUpstream, EventCustomDownstream = (32 << 4) | EventTypeDownstream | EventTypeSerialized, EventCustomDownstreamOob = (32 << 4) | EventTypeDownstream,   EventCustomBoth = (32 << 4) | EventTypeBoth | EventTypeSerialized, EventCustomBothOob = (32 << 4) | EventTypeBoth }
enum	SeekFlag {   SeekFlagNone = 0, SeekFlagFlush = (1 << 0), SeekFlagAccurate = (1 << 1), SeekFlagKeyUnit = (1 << 2),   SeekFlagSegment = (1 << 3), SeekFlagSkip = (1 << 4) }
enum	SeekType { SeekTypeNone = 0, SeekTypeCur = 1, SeekTypeSet = 2, SeekTypeEnd = 3 }
enum	TagMergeMode {   TagMergeUndefined, TagMergeReplaceAll, TagMergeReplace, TagMergeAppend,   TagMergePrepend, TagMergeKeep, TagMergeKeepAll, TagMergeCount }
enum	TagFlag {   TagFlagUndefined, TagFlagMeta, TagFlagEncoded, TagFlagDecoded,   TagFlagCount }
Functions
QDebug	operator<< (QDebug debug, const CapsPtr &caps)
void	init ()
void	init (int *argc, char **argv[])
void	cleanup ()
QDebug	operator<< (QDebug debug, const Structure &structure)
Structure	fromString (const QString &str)
QString	getStringTag (GstTagList *list, const gchar *tag, int index)
quint32	getUintTag (GstTagList *list, const gchar *tag, int index)
double	getDoubleTag (GstTagList *list, const gchar *tag, int index)
QGst::BufferPtr	getBufferTag (GstTagList *list, const gchar *tag, int index)
QDebug	operator<< (QDebug debug, const TagList &taglist)

---

Detailed Description

Wrappers for GStreamer classes.

This namespace provides wrapper classes for GStreamer objects.

Note:

This namespace is contained in the QtGStreamer library.

---

Typedef Documentation

typedef Private::Range<int> QGst::IntRange

Helper structure for accessing int ranges.

Definition at line 106 of file structs.h.

typedef Private::Range<qint64> QGst::Int64Range

Helper structure for accessing qint64 ranges.

Definition at line 111 of file structs.h.

typedef Private::Range<double> QGst::DoubleRange

Helper structure for accessing double ranges.

Definition at line 116 of file structs.h.

typedef Private::Range<Fraction> QGst::FractionRange

Helper structure for accessing fraction ranges.

Definition at line 121 of file structs.h.

---

Function Documentation

void QGst::init

(

)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Note:

You need to include <QGst/Init> to use this function.

Examples:

appsink-src/main.cpp, player/main.cpp, and recorder/main.cpp.

Definition at line 29 of file init.cpp.

void QGst::init	(	int *	argc,
		char **	argv[]
	)

Initializes the GStreamer library, setting up internal path lists, registering built-in elements, and loading standard plugins.

Note:

• This function also calls QGlib::init(), so there is no need to call it explicitly.
• You need to include <QGst/Init> to use this function.

Parameters:

argc	pointer to the application's argc
argv	pointer to the application's argv

Exceptions:

QGlib::Error

when initialization fails

Definition at line 34 of file init.cpp.

void QGst::cleanup

(

)

Clean up any resources created by GStreamer in init().

It is normally not needed to call this function in a normal application as the resources will automatically be freed when the program terminates. This function is therefore mostly used by testsuites and other memory profiling tools.

After this call GStreamer (including this method) should not be used anymore.

Note:

You need to include <QGst/Init> to use this function.

Definition at line 45 of file init.cpp.