TuningSpace Property

Visual Basic
C#
C++/CLI

'Declaration
 
Public Property TuningSpace As Integer

'Usage
 
Dim instance As TVTuner
Dim value As Integer
 
instance.TuningSpace = value
 
value = instance.TuningSpace

public int TuningSpace {get; set;}

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

Property Value

A value representing the tuning space identifier.

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.

Visual Basic
C#
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

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:\Program Files (x86)\LEAD Technologies\LEADTOOLS 18\Media"
End Class

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:\Program Files (x86)\LEAD Technologies\LEADTOOLS 18\Media";
}

Target Platforms

Reference

TVTuner Class
TVTuner Members