Solved

Some C# to VC++ problem, urgent!

Posted on 2004-05-02
10
958 Views
Last Modified: 2007-12-19
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
Comment
Question by:lordiano
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 3
10 Comments
 
LVL 48

Expert Comment

by:AlexFM
ID: 10974589
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
 

Author Comment

by:lordiano
ID: 10974620
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
 
LVL 48

Expert Comment

by:AlexFM
ID: 10974961
It is difficult to say what happens. Do you have C# code working with this class? Or some documentation about this library?
0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 

Author Comment

by:lordiano
ID: 10976047
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
 
LVL 48

Expert Comment

by:AlexFM
ID: 10976132
What reference should I add to make it working?
0
 

Author Comment

by:lordiano
ID: 10976163
Interop.QuartzTypeLib.dll

Do you want me to email it to you?
0
 
LVL 48

Accepted Solution

by:
AlexFM earned 500 total points
ID: 10977921
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

Featured Post

[Webinar] How Hackers Steal Your Credentials

Do You Know How Hackers Steal Your Credentials? Join us and Skyport Systems to learn how hackers steal your credentials and why Active Directory must be secure to stop them. Thursday, July 13, 2017 10:00 A.M. PDT

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In days of old, returning something by value from a function in C++ was necessarily avoided because it would, invariably, involve one or even two copies of the object being created and potentially costly calls to a copy-constructor and destructor. A…
This article will show you some of the more useful Standard Template Library (STL) algorithms through the use of working examples.  You will learn about how these algorithms fit into the STL architecture, how they work with STL containers, and why t…
The goal of the tutorial is to teach the user how to use functions in C++. The video will cover how to define functions, how to call functions and how to create functions prototypes. Microsoft Visual C++ 2010 Express will be used as a text editor an…
The goal of the video will be to teach the user the concept of local variables and scope. An example of a locally defined variable will be given as well as an explanation of what scope is in C++. The local variable and concept of scope will be relat…

728 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question