on saving WAV file - C / C++ / MFC Discussion Boards

Cedric Moonen17-Jan-07 21:01

17-Jan-07 21:01

Well, once you get the encrypted string, you cannot reduce it any further (and even not change it). So your problem is before, already at the encryption.
And I don't know how you can change the size of the encrypted string.

Cédric Moonen
Software developer

Charting control [v1.1]

Re: Converting string to long

Michael Dunn17-Jan-07 22:17

Michael Dunn

17-Jan-07 22:17

The string in your OP is a representation of the encrypted data, it's base-64 encoded. You'll need to be more precise about what you mean by "convert that string into a decent size"

--Mike--
Visual C++ MVP Cool | :cool:

LINKS~! Ericahist | PimpFish | CP SearchBar v3.0 | C++ Forum FAQ");

Ford, what's this fish doing in my ear?

Re: Converting string to long

vgandhi17-Jan-07 22:26

vgandhi

17-Jan-07 22:26

What I mean by that is say the entire string is of 25 size I need to conver that to 10 or maybe less so that when it is displayed on the screen to the user, the user can take that string and read it out to Admin. Hope this makes it clear. Thanks.

Re: Converting string to long

Michael Dunn18-Jan-07 7:52

Michael Dunn

18-Jan-07 7:52

If you want a shorter human-readable string, you'll need to have less encrypted data.

--Mike--
Visual C++ MVP Cool | :cool:

LINKS~! Ericahist | PimpFish | CP SearchBar v3.0 | C++ Forum FAQ");

Ford, what's this fish doing in my ear?

Re: Converting string to long

David Crow18-Jan-07 3:23

David Crow

18-Jan-07 3:23

vgandhi wrote:
Basically I the encrypted binary data I want to convert to a string and display it...

So just display it in encrypted format (i.e., string).

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Re: Converting string to long

vgandhi18-Jan-07 6:44

vgandhi

18-Jan-07 6:44

My friend how can I display it in encrypted format to the user. The user won't understand anything.

Re: Converting string to long

David Crow18-Jan-07 7:08

David Crow

18-Jan-07 7:08

vgandhi wrote:
My friend how can I display it in encrypted format to the user. The user won't understand anything.

This makes no sense. The whole purpose for encryption is so that "it" is not understandable.

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

on saving WAV file

git crunk17-Jan-07 20:24

git crunk

17-Jan-07 20:24

why do i get an error with this source code? pls help me..im new to programming

///////////////////////////////////////////////////////////
// lpszPathName - Pathname of file
// pSound - Pointer to sound buffer
// cbSound - size in bytes of sound buffer
// pWfx - pointer to WAVEFORMATEX structure
// cbWfx - size of this structure

BOOL SaveWAVFile(LPCTSTR lpszPathName, HPSTR pSound, LONG cbSound,WAVEFORMATEX pWfx, LONG cbWfx)
{
MMIOINFO mmioinfo;
MMCKINFO ckRIFF;
MMCKINFO ck;
HMMIO hmmio;

::ZeroMemory(&mmioinfo,sizeof(mmioinfo));

hmmio = mmioOpen((LPSTR) lpszPathName,&mmioinfo,MMIO_WRITE|MMIO_CREATE);

if (hmmio == NULL)
{
TRACE("mmioOpen returns NULL\n");
return FALSE;
}

// Creating 'RIFF' and 'WAVE' chunks
ckRIFF.fccType = mmioFOURCC('W', 'A', 'V', 'E');
ckRIFF.cksize = 0L;
ckRIFF.dwFlags = MMIO_DIRTY;
mmioCreateChunk(hmmio, &ckRIFF, MMIO_CREATERIFF);

// Creating 'fmt ' chunk
ck.ckid = mmioFOURCC('f', 'm', 't', ' ');
ck.cksize = 0L;
ck.dwFlags = MMIO_DIRTY;
mmioCreateChunk(hmmio, &ck, 0);
mmioWrite(hmmio, (HPSTR) pWfx, cbWfx);

// Goto to 'WAVE' chunk and update 'fmt ' chunk size
mmioAscend(hmmio, &ck, 0);

// Creating 'data' chunk
ck.ckid = mmioFOURCC('d', 'a', 't', 'a');
ck.cksize = 0L;
ck.dwFlags = MMIO_DIRTY;
mmioCreateChunk(hmmio, &ck, 0);
mmioWrite(hmmio,(HPSTR) pSound,cbSound);

// Goto to 'WAVE' chunk and update 'data' chunk size
mmioAscend(hmmio, &ck, 0);

// Goto to 'RIFF' chunk and update 'WAVE' chunk size
mmioAscend(hmmio, &ckRIFF, 0);
mmioClose(hmmio,0);
}

Re: on saving WAV file

Cedric Moonen17-Jan-07 20:33

Cedric Moonen

17-Jan-07 20:33

killer fria wrote:
why do i get an error with this source code?

When you have an error, it would be nice to explain exactly what the problem is. I have an error is very vague and doesn't give any clue about what the problem could be. Compile error ? Linker error ? Run-time error ? And describe exactly the error.

And also, use the code tag (above the emoticons) whenever you need to post code otherwise your code is almost unreadable.

Cédric Moonen
Software developer

Charting control [v1.1]

Re: on saving WAV file

git crunk18-Jan-07 22:09

git crunk

18-Jan-07 22:09

oh im sorry.it was just my first time to join forums like this. anyway the error that im referring to is an unexpected end of file while looking for pre compiled header directive.

i dont know what header i will use for this program.
here's the code..

///////////////////////////////////////////////////////////<br />
// lpszPathName - Pathname of file<br />
// pSound - Pointer to sound buffer<br />
// cbSound - size in bytes of sound buffer<br />
// pWfx - pointer to WAVEFORMATEX structure<br />
// cbWfx - size of this structure<br />
//#include <dxerr9.h><br />
<br />
<br />
	<br />
BOOL SaveWAVFile(LPCTSTR lpszPathName, HPSTR pSound, LONG cbSound,WAVEFORMATEX pWfx, LONG cbWfx);<br />
{<br />
	MMIOINFO mmioinfo;<br />
	MMCKINFO ckRIFF;<br />
	MMCKINFO ck;<br />
	HMMIO hmmio;<br />
<br />
	::ZeroMemory(&mmioinfo,sizeof(mmioinfo));<br />
	{<br />
	hmmio = mmioOpen((LPSTR) lpszPathName,&mmioinfo,MMIO_WRITE|MMIO_CREATE);<br />
<br />
	if (hmmio == NULL) <br />
		{<br />
		TRACE("mmioOpen returns NULL\n");<br />
		return FALSE;<br />
		}<br />
<br />
	// Creating 'RIFF' and 'WAVE' chunks<br />
	ckRIFF.fccType = mmioFOURCC('W', 'A', 'V', 'E');<br />
	ckRIFF.cksize = 0L;<br />
	ckRIFF.dwFlags = MMIO_DIRTY;<br />
	mmioCreateChunk(hmmio, &ckRIFF, MMIO_CREATERIFF);<br />
<br />
	// Creating 'fmt ' chunk<br />
	ck.ckid = mmioFOURCC('f', 'm', 't', ' ');<br />
	ck.cksize = 0L;<br />
	ck.dwFlags = MMIO_DIRTY;<br />
	mmioCreateChunk(hmmio, &ck, 0);<br />
	mmioWrite(hmmio, (HPSTR) pWfx, cbWfx);<br />
<br />
	// Goto to 'WAVE' chunk and update 'fmt ' chunk size<br />
	mmioAscend(hmmio, &ck, 0);<br />
<br />
	// Creating 'data' chunk<br />
	ck.ckid = mmioFOURCC('d', 'a', 't', 'a');<br />
	ck.cksize = 0L;<br />
	ck.dwFlags = MMIO_DIRTY;<br />
	mmioCreateChunk(hmmio, &ck, 0);<br />
	mmioWrite(hmmio,(HPSTR) pSound,cbSound);<br />
<br />
	// Goto to 'WAVE' chunk and update 'data' chunk size<br />
	mmioAscend(hmmio, &ck, 0);<br />
<br />
	// Goto to 'RIFF' chunk and update 'WAVE' chunk size<br />
	mmioAscend(hmmio, &ckRIFF, 0);<br />
	mmioClose(hmmio,0);<br />
}<br />

Re: on saving WAV file

Cedric Moonen19-Jan-07 0:58

Cedric Moonen

19-Jan-07 0:58

git crunk wrote:
anyway the error that im referring to is an unexpected end of file while looking for pre compiled header directive

Well, that would have been impossible to determine by the code snippet you posted OMG | :OMG:

. So, from now on remember to be extremely specific whenever you ask a question.

To correct the problem, simply add #include "stdafx.h" at the top of your .cpp file (and before all other include directive, otherwise it won't work).
Remember to do that in all the cpp files you create.

Another option is to disable the precompiled directive. You can go in your "project settings", "C/C++", "Precompiled headers" and there you should find an option to disable the precompiled header (I'm not totally sure of the way to access it but it should give a good idea of where to find the setting)

Cédric Moonen
Software developer

Charting control [v1.1]

My CreateFile is not working

amitmistry_petlad 17-Jan-07 19:54

amitmistry_petlad

17-Jan-07 19:54

hi !
i have created a function below to check the whether the file is created on that particular drive.
but gives INVALID_HANDLE_VALUE Sigh | :sigh:

<CODE>
void _FilePersistandata()
{
	HANDLE	hFile = INVALID_HANDLE_VALUE;

	hFile=CreateFile ( L"c:\FileProperty.XML"
                         , GENERIC_READ | GENERIC_WRITE
                         , 0
                         , NULL
                         , OPEN_EXISTING
                         , FILE_FLAG_NO_BUFFERING
                         , NULL
                         );

	if(hFile == INVALID_HANDLE_VALUE)
	{
		MessageBox(0,_T("File is not created"),_T("Create File"),0);
		
	}
	else
	{
		MessageBox(0,_T("file has been created"),_T("Creat File"),0);		
	}
  
}
</CODE>

Re: My CreateFile is not working

prasad_som17-Jan-07 19:59

prasad_som

17-Jan-07 19:59

amitmistry_petlad wrote:
hFile=CreateFile ( L"c:\FileProperty.XML"

You missed a escape sequence here. i.e. L"c:\FileProperty.XML" should be L"c:\\FileProperty.XML".

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: My CreateFile is not working

amitmistry_petlad 17-Jan-07 20:12

amitmistry_petlad

17-Jan-07 20:12

i have did it. but still it gives the error

HANDLE	hFile = INVALID_HANDLE_VALUE;

	hFile=CreateFile ( L"c:\\FileProperty.XML"  <code>//modified </code>
                         , GENERIC_READ | GENERIC_WRITE
                         , FILE_SHARE_READ
                         , NULL
                         , CREATE_NEW|OPEN_EXISTING <code>//modified </code>
                         , FILE_ATTRIBUTE_NORMAL
                         , NULL
                         );

	if(hFile == INVALID_HANDLE_VALUE)
	{
		MessageBox(0,_T("File is not created"),_T("Create File"),0);
		
	}
	else
	{
	
	MessageBox(0,_T("File is created"),_T("Create File"),0);
		

	}

Re: My CreateFile is not working

prasad_som17-Jan-07 20:25

prasad_som

17-Jan-07 20:25

amitmistry_petlad wrote:
OPEN_EXISTING

Function will fail, if specified file does not exists.

amitmistry_petlad wrote:
CREATE_NEW

Function will fail of specified file does already exists.

So use flags correctly.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: My CreateFile is not working

amitmistry_petlad 17-Jan-07 20:34

amitmistry_petlad

17-Jan-07 20:34

Thanks its working now.
but i did try like c,c++.
i have read it in the ebook after your comment.
so can we not use like in c and c++ if the file exit it overwite and if not present then create automatic.

amit

Re: My CreateFile is not working

prasad_som17-Jan-07 21:30

prasad_som

17-Jan-07 21:30

amitmistry_petlad wrote:
if the file exit it overwite and if not present then create automatic.

Use CREATE_ALWAYS then.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: My CreateFile is not working

Hamid_RT17-Jan-07 20:03

Hamid_RT

17-Jan-07 20:03

You must use of // not /

WhiteSky

Re: My CreateFile is not working

amitmistry_petlad 17-Jan-07 20:15

amitmistry_petlad

17-Jan-07 20:15

i have did it. but still it gives the error

HANDLE	hFile = INVALID_HANDLE_VALUE;

	hFile=CreateFile ( L"c:\\FileProperty.XML"  <code> //modified </code>
                         , GENERIC_READ | GENERIC_WRITE
                         , FILE_SHARE_READ
                         , NULL
                         , CREATE_NEW|OPEN_EXISTING <code> //modified </code>
                         , FILE_ATTRIBUTE_NORMAL
                         , NULL
                         );

	if(hFile == INVALID_HANDLE_VALUE)
	{
		MessageBox(0,_T("File is not created"),_T("Create File"),0);
		
	}
	else
	{
	
	MessageBox(0,_T("File is created"),_T("Create File"),0);
		

	}

Re: My CreateFile is not working

Rajesh R Subramanian17-Jan-07 20:37

Rajesh R Subramanian

17-Jan-07 20:37

WhiteSky wrote:
You must use of // not /

It is \\ and not // or /

Nobody can give you wiser advice than yourself. - Cicero
ப்ரம்மா

Re: My CreateFile is not working

Hamid_RT18-Jan-07 0:38

Hamid_RT

18-Jan-07 0:38

yeah I think I must change position of buttons on the keyboard;P

WhiteSky

CString amd multithreading

softwaremonkey17-Jan-07 19:39

softwaremonkey

17-Jan-07 19:39

Hi,

I read somewhere that its a bad idea to pass CString between threads but I wondered if it was OK if the threads were only reading the CString and not changing it.

I have a global CString initialised by the main thread at start-up but many other threads need to be able to read it while the application is running and I wonderd if this was OK.

Any help would be appreciated.

Tony Big Grin | :-D

Re: CString amd multithreading

Nibu babu thomas17-Jan-07 20:14

Nibu babu thomas

17-Jan-07 20:14

softwaremonkey wrote:
threads were only reading

Reading should be okay. Can you guarantee that the threads will be only reading from the variable and not writing to it. Is it a const variable.

Nibu thomas
A Developer

Programming tips[^] My site[^]

Re: CString amd multithreading

softwaremonkey17-Jan-07 20:53

softwaremonkey

17-Jan-07 20:53

Thanks for the reply. I am not sure that I can make it a const variable otherwise I dont see how I could set it initially (at run time). I guess I could use a const "Get" method to return the string. That should enforce read only access.

Thanks again Cool | :cool:

Re: CString amd multithreading

David Crow18-Jan-07 3:29

David Crow

18-Jan-07 3:29

A CString object in any form is not thread-safe.

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.