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AllowedStreams Property

Summary

Indicates which streams can be played.

Syntax

C++

public virtual StreamFormatType AllowedStreams { get; set; }

Public Overridable Property AllowedStreams As StreamFormatType

public: 
virtual property StreamFormatType AllowedStreams { 
   StreamFormatType get(); 
   void set (    StreamFormatType ); 
}

Property Value

A combination of StreamFormatType enumeration values, indicating which streams can be played.

Remarks

Individual values can be logically OR-ed to create a combination.

Example

using Leadtools; 
using Leadtools.MediaFoundation; 
using LeadtoolsMediaFoundationExamples.Fixtures; 
 
public bool _result = false; 
public PlayCtrlForm _form = new PlayCtrlForm(); 
 
public void ProcessorsExample() 
{ 
   // reference the convert control 
   PlayCtrl playctrl = _form.PlayCtrl; 
 
   // input and output files 
   string inFile = Path.Combine(LEAD_VARS.MediaDir, "ConvertCtrl_Source.avi"); 
 
   try 
   { 
      // disable auto start 
      playctrl.AutoStart = false; 
 
      // set the event handler for state changes 
      playctrl.StateChanged += new StateChangedEventHandler(PlayCtrl_StateChanged); 
      // set source file 
      playctrl.SourceFile = inFile; 
 
      // if we have a video stream 
      if ((playctrl.AllowedStreams & StreamFormatType.Video) == StreamFormatType.Video) 
      { 
         // add the first video processor for playback 
         playctrl.SelectedVideoProcessors.Add(playctrl.VideoProcessors[0]); 
         Processor vproc = playctrl.SelectedVideoProcessors[0]; 
 
         // set the video processor properties 
         if (vproc.HasDialog(ProcessorDlg.Properties)) 
            vproc.ShowDialog(ProcessorDlg.Properties, _form); 
      } 
 
      // if we have an audio stream 
      if ((playctrl.AllowedStreams & StreamFormatType.Audio) == StreamFormatType.Audio) 
      { 
         // add the first audio processor for playback 
         playctrl.SelectedAudioProcessors.Add(playctrl.AudioProcessors[0]); 
         Processor aproc = playctrl.SelectedAudioProcessors[0]; 
 
         // set the audio processor properties 
         if (aproc.HasDialog(ProcessorDlg.Properties)) 
            aproc.ShowDialog(ProcessorDlg.Properties, _form); 
      } 
 
      // start the playback now 
      playctrl.Run(); 
 
      // 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(); 
   } 
   catch (Exception) 
   { 
      _result = false; 
   } 
} 
 
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 ProcessorsExample() 
   ' reference the convert control 
   Dim playctrl As PlayCtrl = _form.PlayCtrl 
 
   ' input and output files 
   Dim inFile As String = Path.Combine(LEAD_VARS.MediaDir, "ConvertCtrl_Source.avi") 
 
   Try 
      ' disable auto start 
      playctrl.AutoStart = False 
 
      ' set the event handler for state changes 
      AddHandler playctrl.StateChanged, AddressOf PlayCtrl_StateChanged 
      ' set source file 
      playctrl.SourceFile = inFile 
 
      ' if we have a video stream 
      If (playctrl.AllowedStreams And StreamFormatType.Video) = StreamFormatType.Video Then 
         ' add the first video processor for playback 
         playctrl.SelectedVideoProcessors.Add(playctrl.VideoProcessors(0)) 
         Dim vproc As Processor = playctrl.SelectedVideoProcessors(0) 
 
         ' set the video processor properties 
         If vproc.HasDialog(ProcessorDlg.Properties) Then 
            vproc.ShowDialog(ProcessorDlg.Properties, _form) 
         End If 
      End If 
 
      ' if we have an audio stream 
      If (playctrl.AllowedStreams And StreamFormatType.Audio) = StreamFormatType.Audio Then 
         ' add the first audio processor for playback 
         playctrl.SelectedAudioProcessors.Add(playctrl.AudioProcessors(0)) 
         Dim aproc As Processor = playctrl.SelectedAudioProcessors(0) 
 
         ' set the audio processor properties 
         If aproc.HasDialog(ProcessorDlg.Properties) Then 
            aproc.ShowDialog(ProcessorDlg.Properties, _form) 
         End If 
      End If 
 
      ' start the playback now 
      playctrl.Run() 
 
      ' 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 
   Catch e1 As Exception 
      _result = False 
   End Try 
End Sub 
 
Private Sub PlayCtrl_StateChanged(ByVal sender As Object, ByVal e As StateChangedEventArgs) 
   ' set the result to what we expect 
   _result = (e.lastState = PlayState.Running AndAlso e.state = PlayState.Stopped) 
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

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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