ResetSource Method (PlayCtrl)

'Declaration
 
Public Overridable Sub ResetSource() 

Public _result As Boolean = False
      Public _form As PlayCtrlForm = New PlayCtrlForm()
      Public _playctrl As PlayCtrl
      Public _seekingCaps As PlaySeeking
      Public _start As TimeSpan = TimeSpan.Zero
      Public Sub HasDialogExample()
         ' reference the play control
         _playctrl = _form.PlayCtrl

         ' input file for playback
         Dim inFile As String = Path.Combine(LEAD_VARS.MediaDir, "PlayCtrl_Source.avi")

         Try
            ' turn off autostart and auto rewind
            _playctrl.AutoStart = False
            _playctrl.AutoRewind = False

            ' set the source file
            _playctrl.SourceFile = inFile

            ' show some media info if available
            ShowMediaInfo()

            ' the HasDialog method tells us that the control
            ' can display the desired settings dialog.
            ' check to see if the video renderer properties dialog is available
            If _playctrl.HasDialog(PlayDlg.VideoRenderer) Then
               ' now show it to change some settings
               _playctrl.ShowDialog(PlayDlg.VideoRenderer, _form)
               _result = True
            End If

            ' get the source object type
            Dim sot As SourceObjectType = _playctrl.SourceType

            ' check some audio properties
            Dim mute As Boolean = _playctrl.Mute
            Dim bal As Integer = _playctrl.Balance
            Dim vol As Integer = _playctrl.Volume

            ' seeking caps - you can use these to enable menu states or toolbar buttons
            _seekingCaps = _playctrl.CheckSeekingCapabilities(PlaySeeking.Forward Or PlaySeeking.Backward)

            ' subscribe to the key press event to demo play functions
            AddHandler _playctrl.KeyPress, AddressOf PlayCtrl_KeyPress

            ' start the capture process
            _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 _
                      OrElse _playctrl.State = PlayState.Paused _
                      OrElse _playctrl.State = PlayState.NotReady
                     Application.DoEvents()
                 Loop

            ' call reset source here to release resources
            ' but not necessary if we are just exiting
            _playctrl.ResetSource()
         Catch e1 As Exception
            _result = False
         End Try
      End Sub

      ' state variables for helper timer states
      Public _markedSelStart As Boolean = False
      Public _markedSelEnd As Boolean = False
      Public _seekedSelStart As Boolean = False
      Public _seekedSelEnd As Boolean = False

      ' key press event handler to manage playback functions
      Private Sub PlayCtrl_KeyPress(ByVal sender As Object, ByVal e As Leadtools.Multimedia.KeyPressEventArgs)
         Dim key As Char = CChar(ChrW(e.keyAscii))
         Select Case key
            Case "b"c
               If (Not _markedSelStart) Then
                  _markedSelStart = True
                  _playctrl.MarkSelectionStart()
                  System.Diagnostics.Debug.WriteLine("Mark Selection Start: " & _playctrl.SelectionStart.ToString() & " secs")
                  System.Diagnostics.Debug.WriteLine("  ... playctrl.State: " & _playctrl.State.ToString())
               End If
            Case "e"c
               If (Not _markedSelEnd) Then
                  _markedSelEnd = True
                  _playctrl.Pause()
                  _playctrl.MarkSelectionEnd()
                  System.Diagnostics.Debug.WriteLine("Mark Selection End: " & _playctrl.SelectionEnd.ToString() & " secs")
                  System.Diagnostics.Debug.WriteLine("  ... playctrl.State: " & _playctrl.State.ToString())
                  _playctrl.SeekSelectionStart()
                  _playctrl.Run()
               End If
            Case "s"c
               If (Not _seekedSelStart) Then
                  _seekedSelStart = True
                  System.Diagnostics.Debug.WriteLine("Seek To Selection Start: " & _playctrl.SelectionStart.ToString() & " secs")
                  System.Diagnostics.Debug.WriteLine("  ... playctrl.State: " & _playctrl.State.ToString())
                  _playctrl.SeekSelectionStart()
               End If
            Case "f"c
               ' toggle full screen
               _playctrl.ToggleFullScreenMode()
            Case "+"c
               If _playctrl.State = PlayState.Running Then
                  _playctrl.Pause()
               End If

               _playctrl.NextFrame()
            Case "-"c
               If _playctrl.State = PlayState.Running Then
                  _playctrl.Pause()
               End If

               _playctrl.PreviousFrame()
            Case "z"c
               If (Not _seekedSelEnd) Then
                  ' turn off full screen mode
                  _playctrl.FullScreenMode = False

                  _seekedSelEnd = True
                  System.Diagnostics.Debug.WriteLine("Seek To Selection End: " & _playctrl.SelectionEnd.ToString() & " secs")
                  System.Diagnostics.Debug.WriteLine("  ... playctrl.State: " & _playctrl.State.ToString())
                  _playctrl.SeekSelectionEnd()
               End If
            Case "x"c
               _playctrl.Stop()

         End Select
      End Sub

      Private Sub ShowMediaInfo()
         Dim d As Double = 0
         Dim sa, scr, sd, sr, st As String

         sa = "Unavailable"
         scr = "Unavailable"
         sd = "Unavailable"
         sr = "Unavailable"
         st = "Unavailable"

         Try
            d = _playctrl.FrameDuration
            sa = _playctrl.Author
            scr = _playctrl.Copyright
            sd = _playctrl.Description
            sr = _playctrl.Rating
            st = _playctrl.Title
         Catch e1 As Exception
         End Try

             MessageBox.Show(_form, String.Format("Duration: {0}" _
                                                  & Microsoft.VisualBasic.Constants.vbLf _
                                                  & "Author: {1}" _
                                                  & Microsoft.VisualBasic.Constants.vbLf _
                                                  & "Copyright: {2}" _
                                                  & Microsoft.VisualBasic.Constants.vbLf _
                                                  & "Desc: {3}" & Microsoft.VisualBasic.Constants.vbLf _
                                                  & "Rating: {4}" & Microsoft.VisualBasic.Constants.vbLf _
                                                  & "Title: {5}" _
                                                  & Microsoft.VisualBasic.Constants.vbLf, _
                                                  d, sa, scr, sd, sr, st), "Media Info")
      End Sub

      Private Sub SelectedOptions()
         _playctrl.SeekStart()
         _playctrl.SeekEnd()
         Dim te As Integer = _playctrl.TrackingSelectionEnd
         Dim ts As Integer = _playctrl.TrackingSelectionStart
         Dim se As Double = _playctrl.SelectionEnd
         Dim ss As Double = _playctrl.SelectionStart
      End Sub

Public NotInheritable Class LEAD_VARS
   Public Const MediaDir As String = "C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 175\Media";
End Class