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Hello all,
I recently took an internship (I'm a junior Computer Engineering major). I've had a lot asked of me, especially for an intern but have come out ok so far after many headaches. Now, I have come to something I just can't quite understand. We need to be able to digitize from a video capture card to an mpeg file. I've read through some stuff about DirectShow, which is what I am supposed to use, but can't quite get my mind around everything. Does anyone know of code or examples I can reference for something like this? Any help would be greatly appreciated!
Dave Wilson
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If you haven't already, download the Platform SDK, which contains the DirectShow sdk...
Windows® Server 2003 SP1 Platform SDK Web Install[^]
The DirectShow base classes are handy (and recommended) for filter development and the sample
applications are pretty decent.
For MPEG encoding, there's no free codecs included except the Windows Media MPEG-4 encoder which
can be accessed using the WM ASF Writer Filter. For other flavors of MPEG you'll need a 3rd-party
codec or roll your own.
Mark
"If you can dodge a wrench, you can dodge a ball."
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Don't use SYSTEM_FONT, that's still around only for compat with Win 3.1. There are many MS blog posts about the right font to use, start with this canned search[^].
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found that DEFAULT_GUI_FONT goes the trik before seeing this post ,thanks anyway
-- modified at 16:50 Thursday 22nd March, 2007
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Michael,
I was wondering how your answer and others ended up hanging in empty space. I agree with your statement about SYTEM_FONT, up to a point. But what was the original question?
INTP
"Program testing can be used to show the presence of bugs, but never to show their absence."Edsger Dijkstra
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For some reason, the OP deleted their post.
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Hi folks
I've created a class that create dynamic menus this is the code of the method that creates hte menus:
<br />
void Menu::InsertNewMenuItem(HMENU hParentMenu, HWND hwWindowOwner, unsigned int uiMenuID, unsigned int uiMenuBehavior, char * cMenuText)<br />
{<br />
int iSize = m_uiMenuID.size();<br />
m_uiMenuID.push_back(uiMenuID);<br />
m_uiBehavior.push_back(uiMenuBehavior);<br />
m_cMenuName.push_back(cMenuText);<br />
if(iSize <= 0)<br />
{<br />
AppendMenu(hParentMenu, m_uiBehavior[0], m_uiMenuID[0], m_cMenuName[0]);<br />
m_hSubMenu = CreateMenu();<br />
}<br />
else<br />
{<br />
AppendMenu(m_hSubMenu, m_uiBehavior[iSize], m_uiMenuID[iSize], m_cMenuName[iSize]);<br />
AppendMenu(hParentMenu, m_uiBehavior[0], (unsigned int)m_hSubMenu, m_cMenuName[0]);<br />
}<br />
SetMenu(hwWindowOwner, hParentMenu);<br />
}<br />
This code is in my callback
<br />
LRESULT CALLBACK WindowProcedure(HWND hwnd, UINT uiMessage, WPARAM wParam, LPARAM lParam)<br />
{<br />
HMENU hMainMenu = CreateMenu();<br />
char * cMainName = "Principal1";<br />
char * cName1 = "Menu 1";<br />
char * cName2 = "Menu 2";<br />
char * cName3 = "Menu 3";<br />
char * cName4 = "Menu 4";<br />
char * cName5 = "Menu 5";<br />
char * cName6 = "Principal2";<br />
char * cName7 = "Menu 7";<br />
char * cName8 = "Menu 8";<br />
char * cName9 = "Menu 9";<br />
char * cName10 = "Menu 10";<br />
int iIDS[] = {6000, 6001, 6002, 6003, 6004, 6005, 6006, 6007, 6008, 6009, 6010};<br />
switch(uiMessage)<br />
{<br />
case WM_CREATE:<br />
{<br />
theMenu = new Menu();<br />
theMenu2 = new Menu();<br />
break;<br />
}<br />
case WM_CHAR:<br />
{<br />
switch(wParam)<br />
{<br />
case 'a':<br />
{<br />
theMenu->InsertNewMenuItem(hMainMenu, hwnd, iIDS[0], MF_STRING|MF_POPUP, cMainName);<br />
DrawMenuBar(hwnd);<br />
break;<br />
}<br />
case 's':<br />
{<br />
theMenu2->InsertNewMenuItem(hMainMenu, hwnd, iIDS[1], MF_STRING, cName1);<br />
DrawMenuBar(hwnd);<br />
break;<br />
}<br />
.....<br />
The problem that I have is: I have 2 menus. When I call the method pressing "a", a submenu is inserted in the first menu. When I call the method pressing "s" to insert a new submenu in the OTHER menu, the first one is overlapped with the first. The same is valid when I insert a submenu in the second menu and insert a valid a submenu in the first menu.
What going on? It's very strange. Am I clear enough for you?
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The first problem I see is that you're calling
HMENU hMainMenu = CreateMenu(); for every window message, I don't think that is what you're after. You can get your window's menu with GetMenu().
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Hi,
I wanna make an app and in the about box to have a small animated 3D thingy with DirectX but dont want to static link* to d3d.lib or w/e ....
except LoadLibrary and GetProcAddress for every dll and proc i need, is there another way
*this is because ,if the target machine doesnt have directx ,should run but the about box should say "...no directx... bla bla" u understand what is what i want right? 
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shaderx wrote: I wanna make an app and in the about box to have a small animated 3D thingy with DirectX but dont want to static link* to d3d.lib or w/e ....
You mean you don't want dynamic linking but static linking ? I don't thing that is possible.
shaderx wrote: except LoadLibrary and GetProcAddress for every dll and proc i need, is there another way
That is still dynamic linking, except that you explicitely load the dll (but you still need the dll to be present on the target machine).
shaderx wrote: u understand what is what i want right?
I'm not so sure...
In brief, you will need to distribute DirectX with your application if you want to use it.
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shaderx wrote: if the target machine doesnt have directx
I think DirectX came installed on all current OS supported by Microsoft so that should not happen. What may not be present is the Version you coded against. See this[^]
led mike
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AFAIK there is no static lib version of DirectX.
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i see ppl dont understand what i mean,and what i mean is:
is there an easyer way to use diretx without linking at load time with it , except LoadLibray and GetCrocAddress for every proc ?
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shaderx wrote: is there an easyer way to use diretx without linking at load time with it , except LoadLibray and GetCrocAddress for every proc ?
I believe what people mean is "no, there isn't".
Mark
"If you can dodge a wrench, you can dodge a ball."
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//hi the type of threading im using is..
#include
#include
using namespace std;
int shutdown=0;
int main(){
unsigned sid;
(HANDLE)_beginthreadex( NULL, 0, threadprocess, NULL, 0, &sid);
while(1){
Sleep(1000);
if(shutdown==1){ break; }
}
}
unsigned __stdcall threadprocess(void *params){
return 0;
}
//What i need to do is pass a string from the main() to the threadprocess.. Please Help.
//I alsot need to send a string back to the main process
//Could be a SOCKET i need to pass back or something for example
//but i know i could just put global string but it needs to separate per proccess ran...
-- modified at 14:47 Thursday 22nd March, 2007
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Whatever you pass as the 4th param to _beginthreadex will be the "params" param in your
threadprocess.
Mark
"If you can dodge a wrench, you can dodge a ball."
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error C2664: '_beginthreadex' : cannot convert parameter 4 from 'std::string' to 'void *'
If i can get this working i can mod my app quite a bit and do many more functions much more efficiently...
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A 'std::string is not a pointer. The size of the parameter passed is the size of a pointer so
that's the largest object you can pass.
Maybe passing the address of your 'std::string' will work. You'll have to cast it back to
a pointer to a std::string in your threadproc.
See DavidCrow's reply.
Mark
"If you can dodge a wrench, you can dodge a ball."
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darkcloud.42o wrote: //What i need to do is pass a string from the main() to the threadprocess.. Please Help.
void __cdecl threadprocess( void *params )
{
char *p = (char *) params;
strcat(p, "World");
}
void main( void )
{
char *s = new char[12];
strcpy(s, "Hello ");
_beginthread(threadprocess, 0, s);
...
delete [] s;
s = NULL;
}
"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15
"Judge not by the eye but by the heart." - Native American Proverb
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ic that appears to be working but i need to have the char s to be used right after the threadprocess completes... which is modified inside threadprocess... see what i mean..
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darkcloud.42o wrote: ...i need to have the char s to be used right after the threadprocess completes... which is modified inside threadprocess... see what i mean..
If you are creating a secondary thread, and then just waiting for it to complete, why bother creating it?
In any case, you'll need to implement some sort of synchronization object.
"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15
"Judge not by the eye but by the heart." - Native American Proverb
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cause i want to have it on a separate thread because it will serv up to 3-10 diff functions each function must be able to operate simultaniously..
eg... it will execute 1-10 threads at once per motherthread and wait for return here...
plus i need to use this thread outside the motherthread so its used all over the freeking app....
I have the threads part setup and it will work.. but i have to have the return on that variable.. could be a socket in some other thread some other time... believe me there are networking situations where this is required...
i see what your saying i could do it another way with limited function... but i will save days of programing/debugging..
I tell you what you contact me via email and ill send you my app what ive got here...
darkcloud.42o@gmail.com
-- modified at 17:10 Thursday 22nd March, 2007
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This code leaks the thread HANDLE. From MSDN: "the handle returned by _beginthreadex has to be closed by the caller of _beginthreadex".
If you don't need the HANDLE make your code look soemthing like this:
HANDLE hThread = (HANDLE)_beginthreadex(NULL, 0, threadprocess, NULL, 0, &sid);
CloseHandle(hThread);
Note that closing the HANDLE doesn't terminate the thread. You may want to add error checking which I didn't include in my example.
Steve
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