• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 1002
  • Last Modified:

Some C# to VC++ problem, urgent!

Hi guys, I have some problem converting some codes from C# to VC++.net
 
The first one is that I am using Interop.QuartzTypeLib.dll
I put them in reference in VC++ and do a:
using namespace QuartzTypeLib;

then when it comes to this line
in C#
m_objFilterGraph = new FilgraphManager(); ---> Fine

in VC++
m_objFilterGraph = new FilgraphManager(); --->ERROR! QuartzTypeLib::FilgraphManager' : you cannot create an instance of an interface...??????

I checked that the C# treats FilegraphManager as an Abstract Interface, whereas VC++ treats it as Interface.
Is that the reaosn why? or I simply canno tuse QuartzTypeLib in VC++


Is there a way to convert:
in C#
m_objBasicAudio = m_objFilterGraph as IBasicAudio;

to VC++.net (managed)
???

Thanks all
0
lordiano
Asked:
lordiano
  • 4
  • 3
1 Solution
 
AlexFMCommented:
If FilgraphManager is interface, what is non-interface class which implements it? Create instance of this class and cast it to FilgraphManager.

m_objBasicAudio = m_objFilterGraph as IBasicAudio;

Without knowing these classes I give you example using .NET classes.

C#

IEnumerable p;
p = new Hashtable() as IEnumerable;

C++

IEnumerable* p;
Hashtable* h;

h = new Hashtable();
p = h;


0
 
lordianoAuthor Commented:
Hi AlexFM,
i checked the DLL and found that the FilgraphManager is the class that implements it..

This is what i have :
FilgraphManager  *m_objFilterGraph;

then i try to do
m_objFilterGraph = new FilgraphManager();  error...

public class FilgraphManager
    Member of QuartzTypeLib
    Associated COM class is QuartzTypeLib.FilgraphManagerClass


0
 
AlexFMCommented:
It is difficult to say what happens. Do you have C# code working with this class? Or some documentation about this library?
0
Cloud Class® Course: Microsoft Exchange Server

The MCTS: Microsoft Exchange Server 2010 certification validates your skills in supporting the maintenance and administration of the Exchange servers in an enterprise environment. Learn everything you need to know with this course.

 
lordianoAuthor Commented:
Yep i have C# code working with this class.....
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

using QuartzTypeLib;

namespace DirectShow
{
    public class Form1 : System.Windows.Forms.Form
    {
        private System.Windows.Forms.ToolBar toolBar1;
        private System.Windows.Forms.ToolBarButton toolBarButton1;
        private System.Windows.Forms.ToolBarButton toolBarButton2;
        private System.Windows.Forms.ToolBarButton toolBarButton3;
        private System.Windows.Forms.Panel panel1;
        private System.ComponentModel.IContainer components;

        private const int WM_APP = 0x8000;
        private const int WM_GRAPHNOTIFY = WM_APP + 1;
        private const int EC_COMPLETE = 0x01;
        private const int WS_CHILD = 0x40000000;
        private const int WS_CLIPCHILDREN = 0x2000000;

        private FilgraphManager m_objFilterGraph = null;
        private IBasicAudio m_objBasicAudio = null;
        private IVideoWindow m_objVideoWindow = null;
        private IMediaEvent m_objMediaEvent = null;
        private IMediaEventEx m_objMediaEventEx = null;
        private IMediaPosition m_objMediaPosition = null;
        private IMediaControl m_objMediaControl = null;
        private System.Windows.Forms.MenuItem menuItem5;

        enum MediaStatus { None, Stopped, Paused, Running };

        private MediaStatus m_CurrentStatus = MediaStatus.None;
            private System.Windows.Forms.Button button3;
            private System.Windows.Forms.Button button4;
            private System.Windows.Forms.Button PlayButton;
            static private String current_path;
        public Form1()
        {
                   InitializeComponent();
                  current_path = null;
             
        }

            public Form1(String filename)
            {
                  InitializeComponent();
                  current_path = filename;
                  manualplay();
            }

          protected override void Dispose( bool disposing )
        {
            CleanUp();
           
            if( disposing )
            {
                if (components != null)
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }

            #region Windows Form Designer generated code
             private void InitializeComponent()
        {
                  this.toolBar1 = new System.Windows.Forms.ToolBar();
                  this.toolBarButton1 = new System.Windows.Forms.ToolBarButton();
                  this.toolBarButton2 = new System.Windows.Forms.ToolBarButton();
                  this.toolBarButton3 = new System.Windows.Forms.ToolBarButton();
                  this.panel1 = new System.Windows.Forms.Panel();
                  this.PlayButton = new System.Windows.Forms.Button();
                  this.button3 = new System.Windows.Forms.Button();
                  this.button4 = new System.Windows.Forms.Button();
                  this.SuspendLayout();
                  //
                  // toolBar1
                  //
                  this.toolBar1.DropDownArrows = true;
                  this.toolBar1.Location = new System.Drawing.Point(0, 0);
                  this.toolBar1.Name = "toolBar1";
                  this.toolBar1.ShowToolTips = true;
                  this.toolBar1.Size = new System.Drawing.Size(368, 42);
                  this.toolBar1.TabIndex = 4;
                  //
                  // panel1
                  //
                  this.panel1.BackColor = System.Drawing.Color.Black;
                  this.panel1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
                  this.panel1.Dock = System.Windows.Forms.DockStyle.Fill;
                  this.panel1.Location = new System.Drawing.Point(0, 42);
                  this.panel1.Name = "panel1";
                  this.panel1.Size = new System.Drawing.Size(368, 341);
                  this.panel1.TabIndex = 3;
                  //
                  // PlayButton
                  //
                  this.PlayButton.Location = new System.Drawing.Point(8, 8);
                  this.PlayButton.Name = "PlayButton";
                  this.PlayButton.Size = new System.Drawing.Size(56, 24);
                  this.PlayButton.TabIndex = 6;
                  this.PlayButton.Text = "Play";
                  this.PlayButton.Click += new System.EventHandler(this.button2_Click);
                  //
                  // button3
                  //
                  this.button3.Location = new System.Drawing.Point(88, 8);
                  this.button3.Name = "button3";
                  this.button3.Size = new System.Drawing.Size(56, 24);
                  this.button3.TabIndex = 7;
                  this.button3.Text = "Pause";
                  this.button3.Click += new System.EventHandler(this.button3_Click);
                  //
                  // button4
                  //
                  this.button4.Location = new System.Drawing.Point(168, 8);
                  this.button4.Name = "button4";
                  this.button4.Size = new System.Drawing.Size(56, 24);
                  this.button4.TabIndex = 8;
                  this.button4.Text = "Stop";
                  this.button4.Click += new System.EventHandler(this.button4_Click);
                  //
                  // Form1
                  //
                  this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
                  this.ClientSize = new System.Drawing.Size(368, 383);
                  this.Controls.Add(this.button4);
                  this.Controls.Add(this.button3);
                  this.Controls.Add(this.PlayButton);
                  this.Controls.Add(this.panel1);
                  this.Controls.Add(this.toolBar1);
                  this.Name = "Form1";
                  this.Text = "MoviePlayer-CSCI576b";
                  this.SizeChanged += new System.EventHandler(this.Form1_SizeChanged);
                  this.Load += new System.EventHandler(this.Form1_Load);
                  this.ResumeLayout(false);

            }
            #endregion

            [STAThread]
            static void Main(string[] args)
            {
                  Application.Run(new Form1(args[0]));
            }

            private void manualplay()
            {
                  if(current_path == null)
                  {
                        Console.WriteLine("dfkajldkfjlkadj");
                        return;
                  }
                  CleanUp();
                  m_objFilterGraph = new FilgraphManager();
                  
                  m_objFilterGraph.RenderFile(current_path);
                  m_objBasicAudio = m_objFilterGraph as IBasicAudio;
               
                  try
                  {
                        m_objVideoWindow = m_objFilterGraph as IVideoWindow;
                        m_objVideoWindow.Owner = (int) panel1.Handle;
                        m_objVideoWindow.WindowStyle = WS_CHILD | WS_CLIPCHILDREN;
                        m_objVideoWindow.SetWindowPosition(panel1.ClientRectangle.Left,
                              panel1.ClientRectangle.Top,
                              panel1.ClientRectangle.Width,
                              panel1.ClientRectangle.Height);
                  }
                  catch (Exception)
                  {
                        m_objVideoWindow = null;
                  }

                  m_objMediaEvent = m_objFilterGraph as IMediaEvent;

                  m_objMediaEventEx = m_objFilterGraph as IMediaEventEx;
                  m_objMediaEventEx.SetNotifyWindow((int) this.Handle,WM_GRAPHNOTIFY, 0);

                  m_objMediaPosition = m_objFilterGraph as IMediaPosition;

                  m_objMediaControl = m_objFilterGraph as IMediaControl;

                  this.Text = "MoviePlayer-CSCI576b - [" + current_path + "]";

                  m_objMediaControl.Run();
                  m_CurrentStatus = MediaStatus.Running;

                  
            }
        private void CleanUp()
        {
            if (m_objMediaControl != null)
                m_objMediaControl.Stop();

            m_CurrentStatus = MediaStatus.Stopped;

            if (m_objMediaEventEx != null)
                m_objMediaEventEx.SetNotifyWindow(0, 0, 0);

            if (m_objVideoWindow != null)
            {
                m_objVideoWindow.Visible = 0;
                m_objVideoWindow.Owner = 0;
            }

            if (m_objMediaControl != null) m_objMediaControl = null;
            if (m_objMediaPosition != null) m_objMediaPosition = null;
            if (m_objMediaEventEx != null) m_objMediaEventEx = null;
            if (m_objMediaEvent != null) m_objMediaEvent = null;
            if (m_objVideoWindow != null) m_objVideoWindow = null;
            if (m_objBasicAudio != null) m_objBasicAudio = null;
            if (m_objFilterGraph != null) m_objFilterGraph = null;
        }

        private void menuItem4_Click(object sender, System.EventArgs e)
        {
            this.Close();
        }

        private void Form1_SizeChanged(object sender, System.EventArgs e)
        {
            if (m_objVideoWindow != null)
            {
                m_objVideoWindow.SetWindowPosition(panel1.ClientRectangle.Left,
                    panel1.ClientRectangle.Top,
                    panel1.ClientRectangle.Width,
                    panel1.ClientRectangle.Height);
            }
        }

        private void toolBar1_ButtonClick(object sender, System.Windows.Forms.ToolBarButtonClickEventArgs e)
        {
            switch(toolBar1.Buttons.IndexOf(e.Button))
            {
                case 0: m_objMediaControl.Run();
                        m_CurrentStatus = MediaStatus.Running;
                        break;

                case 1: m_objMediaControl.Pause();
                        m_CurrentStatus = MediaStatus.Paused;
                        break;

                case 2: m_objMediaControl.Stop();
                        m_objMediaPosition.CurrentPosition = 0;
                        m_CurrentStatus = MediaStatus.Stopped;
                        break;
            }
                 
        }

        protected override void WndProc( ref Message m)
        {
            if (m.Msg == WM_GRAPHNOTIFY)
            {
                int lEventCode;
                int lParam1, lParam2;

                while (true)
                {
                    try
                    {
                        m_objMediaEventEx.GetEvent(out lEventCode,
                            out lParam1,
                            out lParam2,
                            0);
 
                        m_objMediaEventEx.FreeEventParams(lEventCode, lParam1, lParam2);

                        if (lEventCode == EC_COMPLETE)
                        {
                            m_objMediaControl.Stop();
                            m_objMediaPosition.CurrentPosition = 0;
                            m_CurrentStatus = MediaStatus.Stopped;

                        }
                    }
                    catch (Exception)
                    {
                        break;
                    }
                }
            }

            base.WndProc(ref m);
        }

            private void button1_Click(object sender, System.EventArgs e)
            {
                  OpenFileDialog openFileDialog = new OpenFileDialog();

                  openFileDialog.Filter = "Media Files|*.mpg;*.avi;*.wma;*.mov;*.wav;*.mp2;*.mp3|All Files|*.*";

                  if (DialogResult.OK == openFileDialog.ShowDialog())
                  {
                        CleanUp();

                        m_objFilterGraph = new FilgraphManager();
                        m_objFilterGraph.RenderFile(openFileDialog.FileName);

                        m_objBasicAudio = m_objFilterGraph as IBasicAudio;
               
                        try
                        {
                              m_objVideoWindow = m_objFilterGraph as IVideoWindow;
                              m_objVideoWindow.Owner = (int) panel1.Handle;
                              m_objVideoWindow.WindowStyle = WS_CHILD | WS_CLIPCHILDREN;
                              m_objVideoWindow.SetWindowPosition(panel1.ClientRectangle.Left,
                                    panel1.ClientRectangle.Top,
                                    panel1.ClientRectangle.Width,
                                    panel1.ClientRectangle.Height);
                        }
                        catch (Exception)
                        {
                              m_objVideoWindow = null;
                        }

                        m_objMediaEvent = m_objFilterGraph as IMediaEvent;

                        m_objMediaEventEx = m_objFilterGraph as IMediaEventEx;
                        m_objMediaEventEx.SetNotifyWindow((int) this.Handle,WM_GRAPHNOTIFY, 0);

                        m_objMediaPosition = m_objFilterGraph as IMediaPosition;

                        m_objMediaControl = m_objFilterGraph as IMediaControl;

                        this.Text = "DirectShow - [" + openFileDialog.FileName + "]";

                        m_objMediaControl.Run();
                        m_CurrentStatus = MediaStatus.Running;

                  }
            }

            private void Form1_Load(object sender, System.EventArgs e)
            {
                  
            }

            private void button3_Click(object sender, System.EventArgs e)
            {
                  m_objMediaControl.Pause();
                  m_CurrentStatus = MediaStatus.Paused;
            }

            private void button2_Click(object sender, System.EventArgs e)
            {
                  m_objMediaControl.Run();
                  m_CurrentStatus = MediaStatus.Running;
            }

            private void button4_Click(object sender, System.EventArgs e)
            {
                  m_objMediaControl.Stop();
                  m_objMediaPosition.CurrentPosition = 0;
                  m_CurrentStatus = MediaStatus.Stopped;
            }

     
    }
}
0
 
AlexFMCommented:
What reference should I add to make it working?
0
 
lordianoAuthor Commented:
Interop.QuartzTypeLib.dll

Do you want me to email it to you?
0
 
AlexFMCommented:
C# application doesn't work, it gives exception immidiately when starts. However, now I have QuartzTypeLib.dll, so I can do something with it. Please create console C++ application (minimum code) which shows your problem, and post here. I will try to do something.
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

  • 4
  • 3
Tackle projects and never again get stuck behind a technical roadblock.
Join Now