LEADTOOLS Multimedia (Leadtools.MediaFoundation assembly)

Author Property

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Example 



Leadtools.MediaFoundation Namespace > PlayCtrl Class : Author Property
Gets the name of the media's author (if it exists).
Syntax
'Declaration
 
Public Overridable ReadOnly Property Author As String
'Usage
 
Dim instance As PlayCtrl
Dim value As String
 
value = instance.Author
public virtual string Author {get;}
public:
virtual property String^ Author {
   String^ get();
}

Property Value

A string value representing the author's name.
Example
Copy Code   
Imports Leadtools
Imports Leadtools.MediaFoundation
Imports LeadtoolsMediaFoundationExamples.Fixtures

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 selected video processor properties dialog is available
      If _playctrl.HasDialog(PlayDlg.SelVideoProcessor) Then
         ' now show it to change some settings
         _playctrl.ShowDialog(PlayDlg.SelVideoProcessor, _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.MediaFoundation.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 18\Media"
End Class
using Leadtools;
using Leadtools.MediaFoundation;
using LeadtoolsMediaFoundationExamples.Fixtures;

public bool _result = false;
public PlayCtrlForm _form = new PlayCtrlForm();
public PlayCtrl _playctrl;
public PlaySeeking _seekingCaps;
public TimeSpan _start = TimeSpan.Zero;
public void HasDialogExample()
{
   // reference the play control
   _playctrl = _form.PlayCtrl;

   // input file for playback
   string inFile =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 selected video processor properties dialog is available
      if (_playctrl.HasDialog(PlayDlg.SelVideoProcessor))
      {
         // now show it to change some settings
         _playctrl.ShowDialog(PlayDlg.SelVideoProcessor, _form);
         _result = true;
      }

      // get the source object type
      SourceObjectType sot = _playctrl.SourceType;

      // check some audio properties
      bool mute = _playctrl.Mute;
      int bal = _playctrl.Balance;
      int vol = _playctrl.Volume;

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

      // subscribe to the key press event to demo play functions
      _playctrl.KeyPress += new Leadtools.MediaFoundation.KeyPressEventHandler(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.
      while (_playctrl.State == PlayState.Running
         || _playctrl.State == PlayState.Paused
         || _playctrl.State == PlayState.NotReady)
         Application.DoEvents();

      // call reset source here to release resources
      // but not necessary if we are just exiting
      _playctrl.ResetSource();
   }
   catch (Exception)
   {
      _result = false;
   }
}

// state variables for helper timer states
public bool _markedSelStart = false;
public bool _markedSelEnd = false;
public bool _seekedSelStart = false;
public bool _seekedSelEnd = false;

// key press event handler to manage playback functions
void PlayCtrl_KeyPress(object sender, Leadtools.MediaFoundation.KeyPressEventArgs e)
{
   char key = (char)e.keyAscii;
   switch (key)
   {
      case 'b':
         if (!_markedSelStart)
         {
            _markedSelStart = true;
            _playctrl.MarkSelectionStart();
            System.Diagnostics.Debug.WriteLine("Mark Selection Start: " + _playctrl.SelectionStart.ToString() + " secs");
            System.Diagnostics.Debug.WriteLine("  ... playctrl.State: " + _playctrl.State.ToString());
         }
         break;
      case 'e':
         if (!_markedSelEnd)
         {
            _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();
         }
         break;
      case 's':
         if (!_seekedSelStart)
         {
            _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();
         }
         break;
      case 'f':
         // toggle full screen
         _playctrl.ToggleFullScreenMode();
         break;
      case '+':
         if (_playctrl.State == PlayState.Running)
            _playctrl.Pause();

         _playctrl.NextFrame();
         break;
      case '-':
         if (_playctrl.State == PlayState.Running)
            _playctrl.Pause();

         _playctrl.PreviousFrame();
         break;
      case 'z':
         if (!_seekedSelEnd)
         {
            // 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();
         }
         break;
      case 'x':
         _playctrl.Stop();
         break;

   }
}

private void ShowMediaInfo()
{
   double d = 0;
   string sa, scr, sd, sr, st;

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

   try
   {
      d = _playctrl.FrameDuration;
      sa = _playctrl.Author;
      scr = _playctrl.Copyright;
      sd = _playctrl.Description;
      sr = _playctrl.Rating;
      st = _playctrl.Title;
   }
   catch (Exception)
   {
   }

   MessageBox.Show(_form, string.Format("Duration: {0}\nAuthor: {1}\nCopyright: {2}\nDesc: {3}\nRating: {4}\nTitle: {5}\n",
      d, sa, scr, sd, sr, st), "Media Info");
}

void SelectedOptions()
{
   _playctrl.SeekStart();
   _playctrl.SeekEnd();
   int te = _playctrl.TrackingSelectionEnd;
   int ts = _playctrl.TrackingSelectionStart;
   double se = _playctrl.SelectionEnd;
   double ss = _playctrl.SelectionStart;
}

static class LEAD_VARS
{
public const string MediaDir = @"C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 18\Media";
}
Requirements

Target Platforms

See Also

Reference

PlayCtrl Class
PlayCtrl Members

 

 

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