Some problem facing when using Direct show for streaming media - C / C++ / MFC Discussion Boards

cancerion16-Dec-05 21:05

16-Dec-05 21:05

hi ,

i want to get my system ip by using some code in my program , how i can do it,

i tried from registry in HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\Interfaces

but it's a type of reg_multi_sz.

which type variable i should made in queryvalue function

plz respond as soon as

thanks in advance

Re: how can i get the ip of my system

ThatsAlok16-Dec-05 21:52

ThatsAlok

16-Dec-05 21:52

cancerion wrote:
but it's a type of reg_multi_sz.

which type variable i should made in queryvalue function

http://www.codeproject.com/internet/ChangingIPADDRESS.asp[^]

"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

directshow sdk

dolph_loe16-Dec-05 20:56

dolph_loe

16-Dec-05 20:56

I cant find the directshow sdk anywhere..! I downloaded the latest directx sdk, but it seems like it has been excluded from that package. Anybody who knows where I can get it? I am trying to access a webcam. Are there any other ways to do this?

øivind

Re: directshow sdk

Farhat Aisha18-Dec-05 3:18

Farhat Aisha

18-Dec-05 3:18

You can get directshow sdk from the link below
http://www.microsoft.com/downloads/details.aspx?FamilyID=4e825a37-0c94-4421-9ec8-156e52525d11&DisplayLang=en[^]

Besides this Intel's Opencv has many examples from capturing webcam to manipulating the videos. You can get it from the link below
http://www.intel.com/technology/computing/opencv/index.htm[^]

ListCtrl / gridcontrol containing tree control in VC++

doubts.vc16-Dec-05 20:16

doubts.vc

16-Dec-05 20:16

hai..
in VC++ how can we insert a tree control in to a grid or list control .
please help
thanks in advance

shibu

Re: ListCtrl / gridcontrol containing tree control in VC++

Ravi Bhavnani17-Dec-05 3:24

Ravi Bhavnani

17-Dec-05 3:24

See this[^] article.

/ravi

My new year's resolution: 2048 x 1536
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ravib(at)ravib(dot0com

Re: ListCtrl / gridcontrol containing tree control in VC++

doubts.vc20-Dec-05 16:43

doubts.vc

20-Dec-05 16:43

thanks ..

Some problem facing when using Direct show for streaming media

StarMeteor16-Dec-05 19:17

StarMeteor

16-Dec-05 19:17

Hi All,

(Sorry for my poor english Wink | ;)

)

I am currently writting a software using Direct Show to play both streaming and audio (e.g. MP3, WMA, etc.), which somehow like a Music player as WMP/Winamp.

First, I wrote a stand-alone player (with MFC in dialog-based approach) and it works fine. Smile | :)

Then, I intergrate this dialog to be as a child dialog and put it into my main application, problems come Cry | :((

My application contains a main dialog, with two child dialogs build on it, while one is the player mentioned above and the other is for playlist purpose which contain List control for managing song record. The player works fine as it is when playing audio files, but problem occur when playing streaming media.

I tried to figure out what happen and find that the failure of playing streaming media ONLY occur after the playlist dialog is being created! it report that no filter can be found ... It sounds a mircale to me as there is nothing related to Direct Show for the playlist dialog (you can treat it just a simple dialog-based function).....

Is there anyone can give me some suggestions?

Thanks a lot!

Sending text to chat via Edit

tansey416-Dec-05 17:53

tansey4

16-Dec-05 17:53

I have a 3rd party program which contains a chat area. I am trying to create a function which sends a message to that chat. I have the handle to the parent window and the handle to the Edit window where you type. I am not having any trouble setting the text in the Edit window, my issue is sending the text. All I want to do is be able to send the box a simulated Return key press, but I'm having a lot of issues with it and can't seem to get it to work.

I spied the window and when a real Return is pressed, it generates two messages:

P WM_KEYDOWN nVirtKey:VK_RETURN cRepeat:1 ScanCode:1C fExtended: 0 fAltDown: 0 fRepeat: 0 fUp: 0<br />
<br />
P WM_KEYUP nVirtKey:VK_RETURN cRepeat:1 ScanCode:1C fExtended: 0 fAltDown: 0 fRepeat:1 fUp:1<br />

For KEYDOWN, the parameters are:
wParam: 0000000D
lParam: 001C0001

For KEYUP, the parameters are:
wParam: 0000000D
lParam: C01C0001

Given all this information, my current function looks like:

<br />
void say( const char* toSay )<br />
{<br />
    HWND tempa = SetActiveWindow( hwnd );<br />
	HWND tempw = SetFocus( chatBox );<br />
	Sleep(500);<br />
	SendMessage( chatBox, WM_SETTEXT, (WPARAM)0, (LPARAM)toSay );<br />
	Sleep(1000);<br />
	PostMessage( chatBox, WM_KEYDOWN, VK_RETURN, 0x001C0001 );<br />
	Sleep(2000);<br />
	PostMessage( chatBox, WM_KEYUP, VK_RETURN, 0xC01C0001 );<br />
	Sleep(2000);<br />
	SetFocus( tempw );<br />
	SetActiveWindow( tempa );<br />
}

I have had very little success with this method. It will sometimes send the first message it gets but then will no longer send anything. It seems like this should be much simpler, as I'm sure it's a common need. Any help is greatly appreciated.

Re: Sending text to chat via Edit

VikramDelhi16-Dec-05 20:29

VikramDelhi

16-Dec-05 20:29

watch out this http://www.codeproject.com/dialog/keystroke.asp[^]

Re: Sending text to chat via Edit

tansey416-Dec-05 21:43

tansey4

16-Dec-05 21:43

Thanks for the link Vikram, however it seems that there is a bug with that engine (and the user comments seem to confirm) that creates problems with XP.

From what I saw in the source of that project, I thought that this would work:

void say( const char* toSay )<br />
{<br />
	if( !SetForegroundWindow( chatBox ) ){ cout << "COULD NOT SET CHATBOX TO ACTIVE" << endl; }<br />
	Sleep(500);<br />
	UINT scan = MapVirtualKey( VK_RETURN, 0 );<br />
	Sleep(500);<br />
	SendMessage( chatBox, WM_SETTEXT, (WPARAM)0, (LPARAM)toSay );<br />
	Sleep(2000);<br />
	keybd_event(VK_RETURN, scan, KEYEVENTF_EXTENDEDKEY | 0, 0 );<br />
	Sleep(2000);<br />
	keybd_event(VK_RETURN, scan, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);<br />
}

However, that doesn't seem to work. As in my previously posted function, the chatBox is set with the text and when VK_RETURN is sent it does clear, but it does not show up in the chat, it just gets cleared. I'm not sure why this is.

-- modified at 3:43 Saturday 17th December, 2005

Destroying the window

chethu66516-Dec-05 17:06

chethu665

16-Dec-05 17:06

how to destroy a CFormView Dialog from another CFormView Dialog

"Men never do evil so completely and cheerfully as when they do it from religious conviction"
-Pascal

drawing HICON

T1TAN16-Dec-05 15:29

T1TAN

16-Dec-05 15:29

Is there an article about creating an icon dynamically?? For example, like task manager does when you minimize it to tray, it displays CPU usage. Is there a way to draw a bitmap on memDC and then somehow convert it to HICON??

thx

---
http://sprdsoft.cmar-net.org - We Sprd You Softly
Our site features contents and several images. All of this is very weird.

In the end, war is not about who's right, it's about who's left.

Re: drawing HICON

PJ Arends16-Dec-05 17:15

PJ Arends

16-Dec-05 17:15

CreateIconIndirect().

Use an all black bitmap as the mask.

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

"Obviously ??? You're definitely a superstar!!!" - mYkel - 21 Jun '04

"There's not enough blatant self-congratulatory backslapping in the world today..." - HumblePie - 21 Jun '05

Within you lies the power for good - Use it!

Re: drawing HICON

T1TAN17-Dec-05 13:11

T1TAN

17-Dec-05 13:11

Thanx PJ, will try Smile | :)

---
http://sprdsoft.cmar-net.org - We Sprd You Softly
Our site features contents and several images. All of this is very weird.

In the end, war is not about who's right, it's about who's left.

Setting hi and low-order words

Alex Orovetskiy16-Dec-05 11:23

Alex Orovetskiy

16-Dec-05 11:23

There's HIWORD and LOWORD macros for retreiving but what are for setting ?

--------------------------------
Human stupidity is infinite.

Re: Setting hi and low-order words

Nish Nishant16-Dec-05 11:27

Nish Nishant

16-Dec-05 11:27

MAKELONG

Re: Setting hi and low-order words

Alex Orovetskiy16-Dec-05 11:40

Alex Orovetskiy

16-Dec-05 11:40

Umm...right. I knew it was something that obvious. Need to stop trying to do something at 1am.

--------------------------------
Human stupidity is infinite.

Re: Setting hi and low-order words

Jörgen Sigvardsson16-Dec-05 12:23

Jörgen Sigvardsson

16-Dec-05 12:23

There's always (hi << 16) | lo Smile | :)

--
Pictures[^] from my Japan trip.

Re: Setting hi and low-order words

Alex Orovetskiy16-Dec-05 21:46

Alex Orovetskiy

16-Dec-05 21:46

Thanks but no thanks. Bitwise operators is one of not so many topics I've missed during my programming studies and can't catch until now Frown | :(

--------------------------------
Human stupidity is infinite.

Re: Setting hi and low-order words

ThatsAlok16-Dec-05 21:54

ThatsAlok

16-Dec-05 21:54

Alex Orovetskiy wrote:
There's HIWORD and LOWORD macros for retreiving but what are for setting ?

One More MAKEWPARAM

"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

WriteFile hangs

dave siegfried16-Dec-05 10:12

dave siegfried

16-Dec-05 10:12

I am sending a report to a HID device. I have created a handle using:

WriteHandle=CreateFile
(detailData->DevicePath,
GENERIC_WRITE,
FILE_SHARE_READ|FILE_SHARE_WRITE,
(LPSECURITY_ATTRIBUTES)NULL,
OPEN_EXISTING,
0,
NULL);

I then write a report:

OutputReport[0]=0;
OutputReport[1]=1;
OutputReport[2]=2;
OutputReport[3]=3;
OutputReport[4]=4;
OutputReport[5]=5;
OutputReport[6]=6;
OutputReport[7]=7;

Result = WriteFile
(WriteHandle,
OutputReport,
Capabilities.OutputReportByteLength,
&BytesWritten,
NULL);

The first time I send a report,it works just fine. I checked the protocol analyzer and I see the report in its entirety. No problem.

The second time I send the report it hangs. I don't need overlapped I/O, as I wait for the report to finish. I am not receiving any reports from the device. Got any ideas?

Dave

Re: WriteFile hangs

David Crow16-Dec-05 14:55

David Crow

16-Dec-05 14:55

dave siegfried wrote:
Capabilities.OutputReportByteLength

What is the value of this?

"Take only what you need and leave the land as you found it." - Native American Proverb

#pragma once, #ifndef problem

werfel16-Dec-05 10:06

werfel

16-Dec-05 10:06

i am having a problem with the linker reading a .h file multiple times, despite my use of #pragma once and #ifndef

the header file looks like this:

#pragma once
#ifndef <uniquename>
#define <uniquename>

// function declarations

#endif

why aren't these statements preventing the linker from reading this file multiple times?
what can i do?

-thanks

Re: #pragma once, #ifndef problem

Maximilien16-Dec-05 10:12

Maximilien

16-Dec-05 10:12

why would you want to read it more than once ?

and the link doesn't care about .h files, are you talking about the compiler ?

'nyway... it's doing exactly what it's supposed to do

the #pragma once ( Microsoft specific ) will tell the compiler that this file can only be read once.

the #ifndef/#define/#endif construct ( portable ) will let the compiler read the file once, and define a symbol, and the next time the file is read, the symbol is defined, so it will not go thrue the rest of the declaration.

what kind of problem are you experiencing ? what do you want to do ?

Maximilien Lincourt
Your Head A Splode - Strong Bad

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