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TuningSpace Property

Summary

Gets or sets the current tuning space.

Syntax

C++

public int TuningSpace { get; set; }

Public Property TuningSpace As Integer

public: 
property int TuningSpace { 
   int get(); 
   void set (    int ); 
}

Property Value

A value representing the tuning space identifier.

Remarks

Gets or sets the current tuning space. A tuning space is a set of information about the available channels and the channel to frequency mapping, which can identify a particular network provider or broadcast source. Multiple tuning spaces can be determined and stored for use in multiple areas. To get the most precise frequency for a particular channel, use the AutoTune method. Once the frequencies for all channels have been found by using the AutoTune method, this information can be stored by calling the StoreAutoTune method. For more detailed information, refer to the Microsoft documentation for IAMTuner.get_TuningSpace.

Example

using Leadtools; 
using Leadtools.MediaFoundation; 
using LeadtoolsMediaFoundationExamples.Fixtures; 
 
public bool _result = false; 
public CaptureCtrlForm _form = new CaptureCtrlForm(); 
 
public void TuningSpaceExample() 
{ 
   // reference the forms capture control and tv tuner 
   CaptureCtrl capturectrl = _form.CaptureCtrl; 
 
   // input and output files 
   string inFile = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_Source.avi"); 
   string outFile = Path.Combine(LEAD_VARS.MediaDir, "TVTuner_TuningSpaceExample.avi"); 
 
   try 
   { 
      // select the first device with analog in it's name 
      // Replace "Analog" with your video capture device name 
      if (capturectrl.VideoDevices["Analog"] == null) 
         throw new Exception("No Analog video devices available!"); 
 
      capturectrl.VideoDevices["Analog"].Selected = true; 
 
      // get the TV Tuner device 
      TVTuner tvtuner = capturectrl.TVTuner; 
 
      // Check if TV tuner is valid 
      if (tvtuner != null) 
      { 
         tvtuner.Mode = TunerModeType.TV; 
         tvtuner.SetInputType(0, TunerInputType.Antenna); 
         int tuningSpace = tvtuner.TuningSpace; 
 
         // set the current tuning space to 9999  
         // tuning spaces are user defined and allow you to override  
         // channel and frequency mappings for the given input type (Cable or Antenna) 
         tvtuner.TuningSpace = 9999; 
         tvtuner.CountryCode = 1; 
 
         int max = tvtuner.ChannelMax; 
         int min = tvtuner.ChannelMin; 
 
         // loop through some channels and tune 
         for (int i = min; i <= max; i++) 
         { 
            tvtuner.SetChannel(i, 0, 0); 
            tvtuner.AutoTune(i); 
            bool signal = (tvtuner.SignalPresent == TunerSignalStrength.SignalPresent); 
         } 
 
         // store the tuning frequencies in the tuning space registy 
         tvtuner.StoreAutoTune(); 
 
         // set the result 
         _result = true; 
      } 
   } 
   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 (capturectrl.State == CaptureState.Running) 
      Application.DoEvents(); 
} 
 
static class LEAD_VARS 
{ 
   public const string MediaDir = @"C:\LEADTOOLS21\Media"; 
}

Imports Leadtools 
Imports Leadtools.MediaFoundation 
Imports LeadtoolsMediaFoundationExamples.Fixtures 
 
Public _result As Boolean = False 
Public _form As CaptureCtrlForm = New CaptureCtrlForm() 
 
Public Sub TuningSpaceExample() 
   ' reference the forms capture control and tv tuner 
   Dim capturectrl As CaptureCtrl = _form.CaptureCtrl 
 
   ' input and output files 
   Dim inFile As String = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_Source.avi") 
   Dim outFile As String = Path.Combine(LEAD_VARS.MediaDir, "TVTuner_TuningSpaceExample.avi") 
 
   Try 
      ' select the first device with analog in it's name 
      ' Replace "Analog" with your video capture device name 
      If capturectrl.VideoDevices("Analog") Is Nothing Then 
         Throw New Exception("No Analog video devices available!") 
      End If 
 
      capturectrl.VideoDevices("Analog").Selected = True 
 
      ' get the TV Tuner device 
      Dim tvtuner As TVTuner = capturectrl.TVTuner 
 
      ' Check if TV tuner is valid 
      If Not tvtuner Is Nothing Then 
         tvtuner.Mode = TunerModeType.TV 
         tvtuner.SetInputType(0, TunerInputType.Antenna) 
         Dim tuningSpace As Integer = tvtuner.TuningSpace 
 
         ' set the current tuning space to 9999  
         ' tuning spaces are user defined and allow you to override  
         ' channel and frequency mappings for the given input type (Cable or Antenna) 
         tvtuner.TuningSpace = 9999 
         tvtuner.CountryCode = 1 
 
         Dim max As Integer = tvtuner.ChannelMax 
         Dim min As Integer = tvtuner.ChannelMin 
 
         ' loop through some channels and tune 
         Dim i As Integer = min 
         Do While i <= max 
            tvtuner.SetChannel(i, 0, 0) 
            tvtuner.AutoTune(i) 
            Dim signal As Boolean = (tvtuner.SignalPresent = TunerSignalStrength.SignalPresent) 
            i += 1 
         Loop 
 
         ' store the tuning frequencies in the tuning space registy 
         tvtuner.StoreAutoTune() 
 
         ' set the result 
         _result = True 
      End If 
   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 capturectrl.State = CaptureState.Running 
      Application.DoEvents() 
   Loop 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const MediaDir As String = "C:\LEADTOOLS21\Media" 
End Class

Requirements

Target Platforms

Reference

TVTuner Class

TVTuner Members

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Help Version 21.0.2021.7.2

Leadtools.MediaFoundation Assembly

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