C / C++ / MFC Discussion Boards

ramyasangeet30-May-06 21:50

30-May-06 21:50

hi all,

I have extrated audio from video and i need to store the extracted audio as .wav format.
I wrote the following code to save audio in .wav format.

void CWave::Save(CFile *f)<br />
{<br />
        WAVEFORMATEX m_waveformat;<br />
	m_waveformat.wFormatTag = 1;<br />
	m_waveformat.nChannels = 1;<br />
	m_waveformat.nSamplesPerSec = 7500;<br />
	m_waveformat.nAvgBytesPerSec = 7500;<br />
	m_waveformat.wBitsPerSample = 8;<br />
	m_waveformat.nBlockAlign = 1;<br />
	m_waveformat.cbSize = 0;<br />
<br />
	f->Write("RIFF", 4) ;<br />
      DWORD dwFileSize = 20000 * m_waveformat.nBlockAlign + 36 ;<br />
	f->Write(&dwFileSize, sizeof(dwFileSize)) ;<br />
	f->Write("WAVEfmt ", 8) ;<br />
	DWORD dwFmtSize = 16L;<br />
	f->Write(&dwFmtSize, sizeof(dwFmtSize)) ;<br />
	f->Write(&m_waveformat.wFormatTag , sizeofm_waveformat.wFormatTag)) ;<br />
	f->Write(&m_waveformat.nChannels, sizeof(m_waveformat.nChannels)) ;  f->Write(&m_waveformat.nSamplesPerSec,sizeof(m_waveformat.nSamplesPerSec)); <br />
f->Write(&m_waveformat.nAvgBytesPerSec,sizeofm_waveformat.nAvgBytesPerSec)) ;<br />
f->Write(&m_waveformat.nBlockAlign, sizeof(m_waveformat.nBlockAlign)) ;<br />
f->Write(&m_waveformat.wBitsPerSample, sizeof(m_waveformat.wBitsPerSample)) ;<br />
f->Write("data", 4) ;<br />
        DWORD dwNum = 20000 * m_waveformat.nBlockAlign;<br />
	f->Write(&dwNum, sizeof(dwNum)) ;<br />
	//f->Write(m_buffer.GetBuffer(), dwNum) ;<br />
}

m_pWave.Save("c:\\temp.wav");

Everthing is working fine.A wave file is created in c:.

but when i play the wav file,the is no audio..wat is problem in it.
is that save function is correct?
do u need to add some code??

plz give me suggestions and idea..help me

cheers

sangeet

-- modified at 4:04 Wednesday 31st May, 2006

Re: how to save audio [modified]

Hamid_RT30-May-06 22:20

Hamid_RT

30-May-06 22:20

See Here[^] maybe it is some helpful to you

whitesky

Splitter Window

Member 303984330-May-06 21:47

Member 3039843

30-May-06 21:47

How can u create a splitter window base on the occurance of certain event???
Thanks in advance.

Re: Splitter Window

NiceNaidu30-May-06 22:54

NiceNaidu

30-May-06 22:54

Have u checked the VIEWEX sample of MSDN ??

Appu..
"If you judge people, you have no time to love them."

Re: Splitter Window

Member 303984331-May-06 18:03

Member 3039843

31-May-06 18:03

Yes i checked the VIEWEX in MSDN. But they have given an example for creating the splitter window inside another one.But i want to create the splitter window only when cretain event is occured
My requirement is
paen 1
------------------------------
tree | pane2
ctrl |

when i select a tree item, i want my splitter window to get created in pane2
as shown below
pane1
------------------------
tree | pane2-1
ctrl |------------------
view |pane2-2

How can i do this?? Cry | :((

Socket Vs Port - using firwall (amended)

zahid_ash30-May-06 21:24

zahid_ash

30-May-06 21:24

Hi,

I think normaly Firwalls block ports not the creation of sockets, Am i right?

If this the I have opened a port on server side then the firewall will not allow it , but lets say i allow that port to be open.
On client side I only socket is create to connect to the server ip and port, I think this creation of scoket would not be blocked by client side fire wall to connect to server side application?

any idea / comments

Thanks

Regards.

Re: Socket Vs Port - using firwall (amended)

NiceNaidu30-May-06 23:00

NiceNaidu

30-May-06 23:00

zahid_ash wrote:
I think normaly Firwalls block ports not the creation of sockets, Am i right?

I don't think u r right.
because all the internet application are served through only one port (80).

Appu..
"If you judge people, you have no time to love them."

Re: Socket Vs Port - using firwall (amended)

ThatsAlok31-May-06 0:08

ThatsAlok

31-May-06 0:08

zahid_ash wrote:
On client side I only socket is create to connect to the server ip and port, I think this creation of scoket would not be blocked by client side fire wall to connect to server side application?

Have A try Buddy!

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You

Displaying Message Box while program(code) continues [modified]

KongHL30-May-06 21:23

KongHL

30-May-06 21:23

Is it possible for me to display the message box and let the nxt function to process while the message box remains displayed and the user cannot close it.
The message box will have to be closed after the function finishes.

If yes, how can I go abt doing it?

Another question is how can I display a dialog box ( using doModal() ) and perform a function immediately without User Interaction?

Thanks!!

-- modified at 3:33 Wednesday 31st May, 2006

Re: Displaying Message Box while program(code) continues [modified]

Cedric Moonen30-May-06 21:38

Cedric Moonen

30-May-06 21:38

KongHL wrote:
Is it possible for me to display the message box and let the nxt function to process while the message box remains displayed and the user cannot close it.

You'll have to use modeless dialogs for that. Take a look at this article[^].

KongHL wrote:
Another question is how can I display a dialog box ( using doModal() ) and perform a function immediately without User Interaction?

Override OnInitDialog and call the function there.

Cédric Moonen
Software developer

Charting control

Re: Displaying Message Box while program(code) continues [modified]

KongHL30-May-06 21:57

KongHL

30-May-06 21:57

Hmm I mean doModal(), then call a function of that dialog class immediately after the dialog is being displayed.

Is it possible?

Re: Displaying Message Box while program(code) continues [modified]

_anil_30-May-06 22:16

_anil_

30-May-06 22:16

you can write your funtion in OnShowWindow ;
But still it won't fulfill your purpose as you want to call the funtion after the dialog is displayed.

In that case I have two options.
First in the OnInitDialog function you call SetTimer to set time say 1 sec.
Then call your funtion in OnTimer and kill the timer in OnTimer function.

Second method is that you create a thread to call your funtion.
and start the thread in OnShowWindow.

Regards
Anil

Re: Displaying Message Box while program(code) continues [modified]

toxcct1-Jun-06 23:06

toxcct

1-Jun-06 23:06

_anil_ wrote:
First in the OnInitDialog function you call SetTimer to set time say 1 sec.

very bad idea...!!

consider the case where you init your dialog with a database which it connection is long to establish (at least more that 1 sec)... the program will behave badly.

TOXCCT >>> GEII power

[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]

Re: Displaying Message Box while program(code) continues [modified]

_anil_1-Jun-06 23:21

_anil_

1-Jun-06 23:21

Yes you are right Smile | :)

, Its a bad idea, depending on the situation.
But the programmer know what he wants, and aware of the conditions. if the condition is according to you then we can use thread instead.

But I think still I can make it to work.

<code>
void OnShowWindow(){
  // here I set timer
  SetTimer(....);

 // Then the database connection
 // Its long enough 1 sec 
 // problem .....

  return;
}
</code>

second case

<code>
void OnShowWindow(){
  // Then the database connection
 // Its long enough 1 sec 


  // here I set timer
  SetTimer(....);  // less chance of problem
  return;
}
</code>

It depends on when you set the timer.
But I still agree with you that its a bad idea.
But is one of the solution depending on the situation.

Regards
Anil

-- modified at 5:25 Friday 2nd June, 2006

Re: Displaying Message Box while program(code) continues [modified]

Ștefan-Mihai MOGA30-May-06 21:38

Ștefan-Mihai MOGA

30-May-06 21:38

This might help you: Delay MessageBox with auto-close option[^] Good luck and keep the good coding!

Re: Displaying Message Box while program(code) continues [modified]

Stephen Hewitt30-May-06 22:09

Stephen Hewitt

30-May-06 22:09

KongHL wrote:
Is it possible for me to display the message box and let the nxt function to process while the message box remains displayed and the user cannot close it.

This goes against the concept of a message box. One way you could get this effect is to display the message box in another thread. It might be simpler to make your own modeless dialog however.

Steve

Re: Displaying Message Box while program(code) continues [modified]

KongHL30-May-06 21:44

KongHL

30-May-06 21:44

Delay MessageBox delays a short period of time before going to the next step of code.. But I would like to display the messagebox and continue the nxt step of code as per normal..

Am I correct to say that?

Re: Displaying Message Box while program(code) continues

ThatsAlok31-May-06 0:03

ThatsAlok

31-May-06 0:03

KongHL wrote:
Delay MessageBox delays a short period of time before going to the next step of code.. But I would like to display the messagebox and continue the nxt step of code as per normal..

Create the ModelLess Dialog box!

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You

Re: Displaying Message Box while program(code) continues [modified]

Ștefan-Mihai MOGA30-May-06 22:39

Ștefan-Mihai MOGA

30-May-06 22:39

KongHL wrote:
Is it possible for me to display the message box and let the nxt function to process while the message box remains displayed and the user cannot close it.

Please have a look on Mauro Leggieri's Background Task Dialog[^] Good luck and keep the good coding!

Re: Displaying Message Box while program(code) continues [modified]

toxcct31-May-06 0:06

toxcct

31-May-06 0:06

you could also call it from another thread...

TOXCCT >>> GEII power

[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]

Re: Displaying Message Box while program(code) continues

ThatsAlok31-May-06 0:15

ThatsAlok

31-May-06 0:15

toxcct wrote:
you could also call it from another thread...

UI Thread or worker Thread Smile | :)

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You

Re: Displaying Message Box while program(code) continues

toxcct31-May-06 0:17

toxcct

31-May-06 0:17

i'm not good at using thread (i nenver used them yet), so i cannot say exactly where is the difference b/w them.

TOXCCT >>> GEII power

[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]

Re: Displaying Message Box while program(code) continues

ThatsAlok31-May-06 0:42

ThatsAlok

31-May-06 0:42

toxcct wrote:

i'm not good at using thread (i nenver used them yet), so i cannot say exactly where is the difference b/w them.

Kiddin, it work well from both Option!

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You

Re: Displaying Message Box while program(code) continues

toxcct31-May-06 0:58

toxcct

31-May-06 0:58

any hint btw about the diff between ui thread and worker thread ?

TOXCCT >>> GEII power

[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]

Re: Displaying Message Box while program(code) continues

ThatsAlok31-May-06 1:54

ThatsAlok

31-May-06 1:54

toxcct wrote:
any hint btw about the diff between ui thread and worker thread ?

http://www.flounder.com/mvp_tips.htm#Using%20User-Interface%20Threads[^]
http://www.flounder.com/mvp_tips.htm#Using%20Worker%20Threads[^]

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You

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