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Speaker &amp; 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 &amp; 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! Re: Speaker &amp; 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. 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 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! &quot;delete[]&quot; 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! William Fortes in fide et opere! Re: &quot;delete[]&quot; 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: &quot;delete[]&quot; 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. William Fortes in fide et opere! Re: &quot;delete[]&quot; 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: &quot;delete[]&quot; 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: &quot;delete[]&quot; 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  Hi, Look at the http://www.techsmith.com/download/devtoolsdefault.asp Probably they will pay me for advertising LOL Vitali Re: Capturing screen output BoudewijnEctor1-Aug-03 0:50 BoudewijnEctor 1-Aug-03 0:50  Hi, Thanks Talik, for helping me.;) But don't you know a version of this(or similar) software which is opensource? Checking if CString is Numeric Marissa18231-Jul-03 21:24 Marissa182 31-Jul-03 21:24  is there a simple way to do this or am i gonna hafta write my own function? Re: Checking if CString is Numeric Vitali Halershtein31-Jul-03 21:29 Vitali Halershtein 31-Jul-03 21:29  Hi, Try look at the MSDN "is, isw Routines" This is very simle way. Vitali Re: Checking if CString is Numeric Marissa18231-Jul-03 21:35 Marissa182 31-Jul-03 21:35  it would seem that those are for single characters im looking for something that tests an entire CString :P Re: Checking if CString is Numeric Marissa18231-Jul-03 21:39 Marissa182 31-Jul-03 21:39  also is there an easy way to convert a CString into an int? Re: Checking if CString is Numeric Brian Shifrin1-Aug-03 9:25 Brian Shifrin 1-Aug-03 9:25  CString str(5); int n = _ttoi(str); Re: Checking if CString is Numeric Vitali Halershtein31-Jul-03 21:46 Vitali Halershtein 31-Jul-03 21:46  In this case read MSDN "Data Conversion Routines" such as atof, atoi, atol... Vitali Re: Checking if CString is Numeric Ryan Binns31-Jul-03 21:46 Ryan Binns 31-Jul-03 21:46  Well, loop through for every character then. There's no single-function to do it Ryan "Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact" Re: Checking if CString is Numeric Bob Stanneveld1-Aug-03 8:51 Bob Stanneveld 1-Aug-03 8:51  Actually there is! CString::FindOneOf("AllTheCharactersThatAreNotNumbers..."); It's not the best way to do it, but it is possible A student knows little about a lot. A professor knows a lot about little. I know everything about nothing. Re: Checking if CString is Numeric Ryan Binns1-Aug-03 14:07 Ryan Binns 1-Aug-03 14:07  If you're using Unicode, there are 65525 characters that are not digits . I dunno about you, but I'd rather find a different way . But yes, technically it's possible and no, I didn't think of it A better way to do it is if(str.SpanIncluding(_T("0123456789")) == str) // str is only numeric else // str contains non-numeric characters but this has problems as well Ryan "Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

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