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I've written the capturing code, but I've been unsuccessful at building a graph that captures and previews simultaneously with independant control. I don't think it's related to MC++.
Keeping DirectShow unmanaged pointers as member variables of a managed class, then safe releasing in the overrided IDisposable.Dispose() seems to work fine. ATL smart pointers are most useful inside functions where an error can occur at any point (like inside multiple loops), because clean-up when an occurs can be troublesome with so many COM objects to release.
Each graph will be running in seperate threads, so there shouldn't be any interference and did I forget to mention that most of the time encoding/multiplexing will be done on the capture cards? So, the only thing it has to do is really dump the MPEG2 program streams into a file. This is enough to for my demonstration in a few weeks.
-CV
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I've been trying to convince myself to attempt something like this just to get inside the workings of DirectShow, but, honestly, your project is WAY beyond my current level of understanding.
I read the post you made above, and actually downloaded your code. Interesting stuff. I wish I could offer some intelligent suggestions, but, as you probably realized with my above response, my comprehension of DirectShow is primitive.
Thanks for the code, I haven't seen anything like it EVER at this site. You should do a tutorial.
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LOL. I just re-read my post and some of it did not make sense. I should stop writing when I haven't had my morning cup o' awakeness.
Anywho, declaring managed classes with unmanaged code has worked reasonably well. I think it'll be great for this application. Not sure anymore what I was worried about.
"I've been trying to convince myself to attempt something like this just to get inside the workings of DirectShow, but, honestly, your project is WAY beyond my current level of understanding."
It's taken me about two months to understand DirectShow to the point that I can build reliable applications with it. That is while juggling another C# project and a Linux app. My work had a copy of "Programming Microsoft® DirectShow® for Digital Video and Television" and MSDN docs which have been my main source of DirectShow information. Plus, I'm not a very fast learner.
"I read the post you made above, and actually downloaded your code. Interesting stuff. I wish I could offer some intelligent suggestions, but, as you probably realized with my above response, my comprehension of DirectShow is primitive. "
I appreciate you responding in any case, because explaining my approach helps my own understanding. I was pretty much thrown into this situation because it's what the company needed.
"Thanks for the code, I haven't seen anything like it EVER at this site. You should do a tutorial."
I don't think what I've done is very good or difficult. If it turns out to be a reliable product then I might write a codeproject article. I didn't find the DirectShow .NET library to be very reliable for the DVD player and capture apps I've developed, but you should give that a try if you're interested in building DirectShow apps from C#.
-CV
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I am using a ActiveX component that requires a "ref" to a Object like this:
Encrypt(ref object vaSource, bool bEndOfData);
To use this function in C# you do this:
object vaSource = "This is text";
object encryptedData = encrypt.Encrypt( ref vaSource, true );
What is the equivalent to "ref" in MC++?
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In C++, a & gives you a reference to an object. Is MC++ different ?
Christian Graus - Microsoft MVP - C++
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Yea your correct!... I must have define my variable wrong, because when I tried it that way before I keep getting an compiler error. Now it is working.
Thanks!...
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I have noticed that in some projects are using directive:
#using <mscorelib.dll>
But if i don't include in the project, the app is fine.
What are advantage and disadvantage of using it.
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Hard to say, if you check 'Do not treat <'s as HTML tags' then we can see what you're including.
However, if the code works fine without it, then you don't need it.
Christian Graus - Microsoft MVP - C++
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OK - if your code works fine without it then, like I said, it's not doing anything and doesn't need to be there.
Christian Graus - Microsoft MVP - C++
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Hello everybody,
I'm a newbie to visual studio .net and also in assembly language. However, we have a project requiring low level programming, and decided to use assembly. So I started using PWB of microsoft but I feel awkward using a blue screen (seems like dos old days).
Using Visual C++ .Net, I created an empty project and add an asm file. I used the Custom Build Step and entered C:\masm611\ml.exe /c myfile.asm and compiled the file. It had successfully generated the obj file just like Microsoft PWB. But the problem is I still manually do linking of the obj in command prompt to generate the exe or com files.
Is there a way for visual studio to compile asm and generate the obj, exe/com, map, lst files? If there is how do we do it?
Need help
alex
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I don't think so, at least I didn't hear about it, why do you need assembler, also I thought that .net had its own intermediate assembly language... which I think is a lot easier.
IM PROUD TO BE A GMAIL;
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Is the intermediate assembly language your referring to in .net the masm611 assembly language? Anyway guys, I have a separate post of this same subject in the IDE section and stuart gave me a how-to. (Probably the best solution I can get so far..)
Thanks again guys.. 
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Hi all,
I've created a form that opens to the maximum size. What I want to know is how I set a panels size and position as a percentage of that window so when I resize the window the panel automatically keeps the same proportions. Hope this makes sense!!
Thanks in advance.
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I think it does. Use Anchor in IDE. By using anchor you will lock on form. Try putting all 4 directions.
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does anyone have some source code of Screensaver written in C++ .net.(managed) .
or know how to do it ?
i have found some in MFC, win32api or C#.., but C++ managed.
tks..
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Just use managed code, and do exactly what the other code does. The system has the same expectations of a screen saver, no matter what the language.
Christian Graus - Microsoft MVP - C++
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Hi all,
I have an application in C++. Now inorder to provide unicode support for the same, is there any tool which provides details like exactly which part of code has to be replaced with unicode data types?
Thanks and Regards,
Sree
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I'm not sure I totally understand... What is the library you based the code off of? STL, QT, or what? I assume that you want to move to .NET. That's going to be the thing that decides the final answer.
If you are using standard C++ type then you should understand that characters, in most standard libraries, are 8 bits (1 byte, Ascii http://www.lookuptables.com/). Unicode is 16 bits (2 bytes). The conversion should require come simple binary casting stuff. Look up both and find the differences.
BTW, .NET loves Unicode. Look through the MSDN at System::Char and you will see that by default its a Unicode char.
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hi,
i created a windows service application. when i installed the application using installutil.exe i didn't get any error but the application did not start (set the startType to automatic) when i restarted my computer
please advice....
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Hello,
I have an MFC C++ application. I would like to ship the .exe to another person's machine(WinXP). What are the minimum requirements that are needed on the target machine for it to execute. It complained about a missing DLL. I am still not clear about this. Thank you in advance.
Joe
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This has nothing to do with managed C++. What dlls you need depend on your build settings, and what code you used. MFC lives in a dll, and you need to ship that with the app if you didn't statically link. If you used C runtime functions, you may also need MSVCRT, the thing to do is to run an application like depends, that tells you what your app needs, or get a clean machine and keep adding the stuff it asks for until it runs, then ship with that stuff in future.
Christian Graus - Microsoft MVP - C++
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Christian,
Thanks for the reply.
Joe
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Well my code is slpitted in: one myClasses.h and one myClasses.cpp files and it's something like this:
// *** myClasses.h: ***
#define SIZE 10
public __gc class MyClass;
public __gc class AnotherMyClass;
public __gc class MyClass{
public:
MyClass();
void myMethod();
private:
bool myArray __nogc[SIZE];
AnotherMyClass* anotherMyClass;
};
public __gc class AnotherMyClass{
public:
AnotherMyClass(bool myArray __nogc[SIZE]){ // constructor is inlined
for(int i=0; i<size; i++)
="" this-="">myArray[i] = myArray[i];
}
private:
bool myArray __nogc[SIZE];
};
//*** myClasses.cpp: ***
MyClass::MyClass(){
for(int i; i<size; i++)="" myarray[i]="true;
" anothermyclass="NULL;
}
void" myclass::mymethod(){
="" anothermyclass(myarray);
}
="" ***="" oh,="" and="" this="" is="" the="" main="" (in="" another="" file):="" ***
int="" _tmain(){
="" myclass*="" myclass="new" myclass();
="" myclass-="">myMethod();
return 0;
}
So far I receive this error, but I can't understand why and how to fix it (without using managed arrays):
error C2664: 'AnotherMyClass::AnotherMyClass' : cannot convert parameter 1 from 'bool [10]' to 'bool []'
I can't find anything on google too, help help!
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Please modify this thread and chose "do not treat <'s as HTML tags"
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