Class DSGraphProperty.TDSGraph

Revision as of 20:28, 10 June 2013

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Package: AudioLabBasicPkg

Unit: DSGraphProperty

Inherits: TLPPersistent

Syntax

Delphi:

type TDSGraph = class( TLPPersistent )

C++ Builder:

class TDSGraph : public TLPPersistent

Visual C++ (MFC):

class CTDSGraph : public CTLPPersistent

C# (.NET):

public ref class TDSGraph : Vcl.VclProperty

Summary

DirectShow Graph settings class.

Description

Defines the class for DirectShow Graph settings.

Properties

Published

• AdditionalFilters - Additional DirectShow filters for the DirectShow graph during construction.
• Register - Registers the graph into the Windows Running Object Table.

Public

• MediaControl - IMediaControl interface of the DirectShow graph.
• MediaEvent - IMediaEvent interface of the DirectShow graph.
• GraphBuilder - ICaptureGraphBuilder2 interface of the DirectShow graph.
• Graph - IGraphBuilder interface of the DirectShow graph.
• Filters - The DirechShow filters of the graph.
• HiddenForm

Methods

Public

• function GetFilterList(AFiltersList : TStrings) : Boolean - Returns the list of names of DirectShow filters in the graph.
• function GetFilterByClassID(ClassID : TCLSID) : IBaseFilter
• function SetMediaEvent() : Boolean
• function CreateFilterByName(AFilterName : String) : IBaseFilter
• function ConnectFilterToPin(ASourceFilter : IBaseFilter; ASinkPin : IPin) : Boolean
• function GetAudioRender() : IBaseFilter
• function GetVideoRender() : IBaseFilter
• function RegisterAdditionalFilters() : Boolean
• function CreateGraph() : Boolean
• function CreateGraphBuilder() : Boolean
• procedure GraphChanged()
• procedure GraphBuilt()
• procedure DockResized(APreviewDock : IDSPreviewDock)
• function ConfigVideoWindow(APreviewDock : IDSPreviewDock; APreviewVisible : Boolean; AVideoSize : TSize) : Boolean
• procedure RegisterGraph()
• procedure UnregisterGraph()
• procedure Error(Msg : String; ErrorCode : Integer)
• procedure Warning(Msg : String; ErrorCode : Integer)
• procedure CheckWarning(Msg : String; AValue : HResult)
• procedure DestroyGraph()
• procedure DestroyDownstream(pFilter : IBaseFilter)
• procedure DestroyUpstream(pFilter : IBaseFilter)
• procedure SetMsgEvent(AValue : TWndMethod)
• procedure SetDrainMessage(AValue : IDSPreviewDock)
• function GetMediaControl() : Boolean
• function Run() : Boolean
• procedure Stop(AShowError : Boolean)
• function SaveToFile(AFileName : String) : Boolean - Saves the graph to a *.grf file.
• function GetOwner() : TPersistent

Pins

• GraphPin - The DirectShow Graph pin of the filter.

Events

• OnError - Occurs on DirectShow error.
• OnWarning - Occurs on DirectShow warning.
• OnGraphBuilt - Occurs when the DirectShow graph has been built.
• OnDeviceLost - Occurs when contact with capture or playback device has been lost.
• OnAborted - Occurs when the data streaming has been aborted.
• OnStarvation - Occurs when DirectShow is starving for data buffers.

From TLPPersistent

Methods

Public

• function QueryInterface(IID : TGUID; Obj : TObject) : HResult
• function GetOwner() : TPersistent
• procedure OwnerNameChanged(AOldName : String; ANewName : String)