Re: Speaker & Mic activity meter - C / C++ / MFC Discussion Boards

Bartosz Bien31-Jul-03 23:02

31-Jul-03 23:02

I would like my NT service to transparently display dynamic text on the desktop. Preferrably with GDI+, Windows XP. Any cool ideas? Roll eyes | :rolleyes:

Regards,
BB

Re: Display text on desktop

HPSI1-Aug-03 1:37

HPSI

1-Aug-03 1:37

Method 1: Enable Active Desktop and set the Windows background to an HTML file.

Method 2: Write text to a bitmap and set that bitmap to be the desktop background.

HPS HwndSpy - GUI developer's aid to visually
locate and inspect windows. For the month of August
only, use coupon code CP-81239 for 30% off.

Re: Display text on desktop

andyj1151-Aug-03 3:57

andyj115

1-Aug-03 3:57

Create a Window and modify it's region with the written text.
Here you can find a great sample of a trasparent application:

http://www.codeproject.com/miscctrl/transclock1.asp

It's the same tecnique that somebody uses to make skin dialog/windows. So you can look at other sample too.

To simulate it on the desktop, you can change the Z-Order with the SetWindowPos, so all the other windows will be above it.

Cool | :cool:

Re: Display text on desktop

andyj1151-Aug-03 4:34

andyj115

1-Aug-03 4:34

Sorry, I didn't read that your was an NT service...

In that case, to keep my idea, you need a small "client" app that dialogs with the service...

Suspicious | :suss:

Re: Display text on desktop

Bartosz Bien1-Aug-03 5:07

Bartosz Bien

1-Aug-03 5:07

This technique seems to suit me! Thank you very much. Cool | :cool:

Regards,
BB

SHGetFileInfo

alex.barylski31-Jul-03 23:01

alex.barylski

31-Jul-03 23:01

SHFILEINFO shInfo; 								  
m_imgList.Detach();
m_imgList.Attach((HIMAGELIST)SHGetFileInfo("C:\\", 0, &shInfo, sizeof(SHFILEINFO), SHGFI_SYSICONINDEX | SHGFI_SMALLICON)); 
	
m_imgList.SetBkColor(ILD_TRANSPARENT);
SetImageList(&m_imgList, LVSIL_SMALL);

What the hell is wrong with the above code???

It's weird, cuz when I index image 0-5 they appear...but nothing beyond that??? Mad | :mad:

I'm drinking triples, seeing double and acting single Cool | :cool:

Speaker & Mic activity meter

bilal7831-Jul-03 22:33

bilal78

31-Jul-03 22:33

Hi All!
How can i get the activity on speaker/mic so that i can build the activity meter within my aplication. My application allows voice conversation between two parties. I want to display speaker & mic activity meter on my application. Any sample or piece of code will be highly appreciated.
Thanks a lot
Bilal Anjum

Re: Speaker & Mic activity meter

Alexander ^M.,1-Aug-03 2:20

Alexander ^M.,

1-Aug-03 2:20

read a raw sound block coming from the mic(they have to be quite small), then initialize 2 variables called "iMin" and "iMax"(both initialized with the null sample values), setup a loop for every sample, and then check if the sample is bigger then iMax or lower than iMin and correct the variable then.
after the block, you know, that the average volume is!
show a scale from 0 till sizeof(bytespersample) and show ( iMax - iMin ) there.

Don't try it, just do it! Wink | ;-)

Re: Speaker & Mic activity meter

bilal783-Aug-03 19:02

bilal78

3-Aug-03 19:02

Hi!
Thnaks for the solution, but i am just a newbie and have no idea where and how to read mic/speaker buffer? If you can tell me some APIs or any example coz i have no idea of sound APIs and data structure, that will be really helpful.

Regards
Bilal Anjum

Sizes of integer

Franz Klein31-Jul-03 22:26

Franz Klein

31-Jul-03 22:26

Where can I find information about the various sizes of integers among the various compilers and CPUs. By size I mean how many bytes an integer object is.

Smile | :)

Re: Sizes of integer

alex.barylski31-Jul-03 22:58

alex.barylski

31-Jul-03 22:58

Usually compiler manuals will tell you. I would think that most languages integers will be 32 bits.

I'm drinking triples, seeing double and acting single Cool | :cool:

Re: Sizes of integer

Alexander ^M.,1-Aug-03 2:21

Alexander ^M.,

1-Aug-03 2:21

use sizeof(int) on every compiler you wan't to know the size of

Don't try it, just do it! Wink | ;-)

"delete[]" crashes program.

WREY31-Jul-03 22:24

WREY

31-Jul-03 22:24

In an overloaded "<<" routine, I created an array on the heap. Then I used it to do what I needed, and just prior to the "return" statement, I deleted the same array. However, doing so causes the program to crash when I run it.

Interestingly, if I were to remove the "delete[]" statement, the program runs fine; it doesn't crash, but put it back in, and the program crashes.

The whole idea of using the "delete[]" statement on an array created on the heap, is to avoid memory leak. Here, it makes the program crash.

Does anybody have any idea why? Thanks!

Confused | :confused:

William

Fortes in fide et opere!

Re: "delete[]" crashes program.

Rein Hillmann31-Jul-03 22:27

Rein Hillmann

31-Jul-03 22:27

I've had this before. Something is going wrong with your allocation. Let me guess, if you remove the [] from the delete statement, it won't crash. This isn't a real solution though, since if you're creating an array you need to delete[] the array.

Make sure that your array allocation is done correctly (it's allocating an array, not a scalar) and that you're not de-allocating the memory elsewhere.

Re: "delete[]" crashes program.

Vitali Halershtein31-Jul-03 22:37

Vitali Halershtein

31-Jul-03 22:37

You also can try to redefine operator delete in your class.
It dificult say more withiout source code.

p.s as you know operator delete described as follow:

void operator delete( void * );
void operator delete( void *, size_t );

Vitali

Cause of the problem found.

WREY31-Jul-03 22:37

WREY

31-Jul-03 22:37

Thanks for your reply.

I believe I found the reason for the problem. It has to do with deleting that portion of memory that the "return" statement is outputting, which means if I were to deallocate the memory the array is using, the "return" statement would not work correctly (and is the reason for the crash).

A simpler soultion would be to create an array on the stack and let the routine deletes it when it exits the function.

Smile | :)

William

Fortes in fide et opere!

Re: "delete[]" crashes program.

Kevin McFarlane1-Aug-03 4:57

Kevin McFarlane

1-Aug-03 4:57

WREY wrote:
A simpler soultion would be to create an array on the stack and let the routine deletes it when it exits the function.

I don't know your problem context but, if it really needs to be dynamic, how about using an STL vector?

The delete [] can be a bit of a bugger. A few months ago I had to maintain some code that was missing one of these and thus leaking memory. But when I put it in it crashed. However, the code was so complex that I never got to the bottom of it, and it (the memory leak) was low priority compared to everything else I had to do.

Kevin

Re: "delete[]" crashes program.

peterchen1-Aug-03 2:43

peterchen

1-Aug-03 2:43

This is typically caused by a previous error that went undetected. Possible errors are:

- deleting one memory location twice
- deleting an "invalid" pointer
- writing outside the boundaries of allocated memory

was the memory allocated with new[] or with new ?

"Der Geist des Kriegers ist erwacht / Ich hab die Macht" StS

sighist | Agile Programming | doxygen

Re: "delete[]" crashes program.

John M. Drescher1-Aug-03 6:43

John M. Drescher

1-Aug-03 6:43

This happens if you corrupt the heap, use the wrong pointer or delete the object more than once. I think if you write anything at ptr[-1] you will corrupt the lenght of the allocation and cause a crash...

John

Capturing screen output

BoudewijnEctor31-Jul-03 21:26

BoudewijnEctor

31-Jul-03 21:26

Hi,

DOes anyone know how to capture the screen output, and write that to the disk (as AVI,or something else). I need to build an application wich records all the user interactions, it must also be hidden. It has to work like HyperCam (commercial program for this purpose).

It must work under win2000 (other systems are also OK).

Can anyone help me?

Re: Capturing screen output

Vitali Halershtein31-Jul-03 21:36

Vitali Halershtein

31-Jul-03 21:36