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SourceStream Property

Summary

Gets or sets the media source stream.

Syntax

C++

public virtual Stream SourceStream { get; set; }

Public Overridable Property SourceStream As Stream

public: 
virtual property Stream^ SourceStream { 
   Stream^ get(); 
   void set (    Stream^ ); 
}

Property Value

A System.IO.Stream object for the media source stream.

Remarks

Use this property to assign a Stream-derived object as the media source for the conversion process. The SourceType will be set to SourceObjectType.Stream. Assignment can raise an error exception. For more information, refer to the Error Codes. Note: When setting this property, the Play control must be in the stopped state.

Example

using Leadtools; 
using Leadtools.MediaFoundation; 
using LeadtoolsMediaFoundationExamples.Fixtures; 
 
public bool _result = false; 
public PlayCtrlForm _form = new PlayCtrlForm(); 
 
public void SourceStreamExample() 
{ 
   // reference the play control 
   PlayCtrl playctrl = _form.PlayCtrl; 
 
   // input and output file names 
   string inFile = Path.Combine(LEAD_VARS.MediaDir, "PlayCtrl_Source.avi"); 
 
   try 
   { 
      // turn off auto start 
      playctrl.AutoStart = false; 
 
      // set event handler 
      playctrl.StateChanged += new StateChangedEventHandler(PlayCtrl_StateChanged); 
 
      // set the source stream 
      playctrl.SourceStream = new StreamReader(inFile).BaseStream; 
 
      // set the allowed streams 
      playctrl.AllowedStreams = StreamFormatType.Audio; 
 
      // play it! 
      playctrl.Run(); 
   } 
   catch (Exception) 
   { 
      _result = false; 
   } 
 
   // we'll loop on the state and pump messages for this example. 
   // but you should not need to if running from a Windows Forms application. 
   while (playctrl.State == PlayState.Running) 
      Application.DoEvents(); 
} 
 
void PlayCtrl_StateChanged(object sender, StateChangedEventArgs e) 
{ 
   // set the result to what we expect 
   _result = (e.lastState == PlayState.Running && e.state == PlayState.Stopped); 
} 
 
static class LEAD_VARS 
{ 
   public const string MediaDir = @"C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 20\Media"; 
}

Imports Leadtools 
Imports Leadtools.MediaFoundation 
Imports LeadtoolsMediaFoundationExamples.Fixtures 
 
Public _result As Boolean = False 
Public _form As PlayCtrlForm = New PlayCtrlForm() 
 
Public Sub SourceStreamExample() 
   ' reference the play control 
   Dim playctrl As PlayCtrl = _form.PlayCtrl 
 
   ' input and output file names 
   Dim inFile As String = Path.Combine(LEAD_VARS.MediaDir, "PlayCtrl_Source.avi") 
 
   Try 
      ' turn off auto start 
      playctrl.AutoStart = False 
 
      ' set event handler 
      AddHandler playctrl.StateChanged, AddressOf PlayCtrl_StateChanged 
 
      ' set the source stream 
      playctrl.SourceStream = New StreamReader(inFile).BaseStream 
 
      ' set the allowed streams 
      playctrl.AllowedStreams = StreamFormatType.Audio 
 
      ' play it! 
      playctrl.Run() 
   Catch e1 As Exception 
      _result = False 
   End Try 
 
   ' we'll loop on the state and pump messages for this example. 
   ' but you should not need to if running from a Windows Forms application. 
   Do While playctrl.State = PlayState.Running 
      Application.DoEvents() 
   Loop 
End Sub 
 
Public Sub PlayCtrl_StateChanged(ByVal sender As Object, ByVal e As StateChangedEventArgs) 
   ' set result 
   If e.lastState = PlayState.Running AndAlso e.state = PlayState.Stopped Then 
      _result = True 
   End If 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const MediaDir As String = "C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 20\Media" 
End Class

Requirements

Target Platforms

Reference

PlayCtrl Class

PlayCtrl Members

ResetSource Method

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Help Version 20.0.2020.4.2

Leadtools.MediaFoundation Assembly

Introduction

Getting Started

Namespaces

Leadtools.MediaFoundation Namespace

Leadtools.MediaFoundation.Common Namespace

Assemblies