C / C++ / MFC

Re: DirectShow filter issue

1-Jul-05 5:33

Hi everyone.
I'm coding a source filter and a demultiplexer filter for DirectShow.
When I add the filters to the graph, connect the pins and render the whole thing it still works.
But when I run the graph via IMediaControl::Run it returns S_FALSE.
The SDK says that I should use IMediaControl::GetState after Run() has failed, but GetState() does never return when I have INFINITE as timeout, else it returns an error (VFW_S_STATE_INTERMEDIATE), too.
The graph uses Push-Mode.

Is there a way I can find out what is going wrong?
Thanks for advice,
Alex

Don't try it, just do it! Wink | ;-)

Alexander ^M.,1-Jul-05 10:52

hex to decimal conversion

1-Jul-05 10:52

Problem solved. It's a live source, so there are some things different from a normal pull source.

Don't try it, just do it! Wink | ;-)

StatusBar problem

AnsGe1-Jul-05 4:22

AnsGe

1-Jul-05 4:22

What is the rigth method to add a Statusbar to a Dialog?

I had done this way.

CStatusBar m_StatusBar //Memeber variable

m_StatusBar->Create(this);

But whenever i call 'Invalidate' method the status bar also flickering Frown | :(

Is the GetClientRect retrieves the StatusBar area also?

Thanks in Advance Smile | :)

Ann

Re: StatusBar problem

Blake Miller1-Jul-05 7:20

Blake Miller

1-Jul-05 7:20

I think the status bar is flickering because it is a child of the dialog. If you invalidate the entire dialog, then the status bar comes along for the ride.

Some things I would try:

1. Invalidate only the specific client area of the dialog that does not include the status bar.

2. Adjust the client rect of your dialog to exclude the status bar.

3. Set the clip children style of the dialog, so it does not erase or repaint the area with the status bar or any other child controls.

llp00na1-Jul-05 0:38

1-Jul-05 0:38

Anyone knows a method which does hexadecimal to decimal conversion in the visual c++ library ??

Cheers

llp00na

kakan1-Jul-05 0:41

kakan

1-Jul-05 0:41

scanf(%x) maybe?

kakan1-Jul-05 0:53

kakan

1-Jul-05 0:53

Now I've checked it. Here it is:

int hexToInt(const char * hex)
{
// Expects to get ONE hex digit at the time
int result;

sscanf(hex, "%x", &result);
return result;
}

int main(int argc, char* argv[])
{
int i = hexToInt("FF"); // i becomes 255
i = hexToInt("80"); // i becomes 128
i = hexToInt("40"); // i becomes 64
i = hexToInt("0"); // i becomes 0

return 0;
}

llp00na1-Jul-05 1:36

1-Jul-05 1:36

thanx for the reply, i will test your suggestion and see the results.

I am trying to get colours from the html source code and convert them to RGB format.

using your method will make it easy to convert a string of the format #ffffff
as i will just devide the string into three parts where each part represents red, green, blue respectively.

My problem now is that people sometimes do not use conventional formats but instead use for example : #fff to refer to #0f0f0f, that should not be so hard to deal with. a more complicated case would be : #9999 !!! how do i now which part of the string refers to red, green, and blue !!!

llp00na

kakan1-Jul-05 2:31

kakan

1-Jul-05 2:31

If you can format the string into a string containing 2+2+2 hex characters all the time, then you can use this way to get the values all at once:

int r,g,b;

// Create a test string:
char hex2[10];
strcpy(hex2, "0f05ff");

sscanf(hex2, "%02x%02x%02x", &r, &g, &b);

// Result: r == 15, g == 5, b == 255

It's tested and works.
Later
kakan

C^hris L^osinger1-Jul-05 2:44

C^hris L^osinger

1-Jul-05 2:44

llp00na wrote:
#9999

IE treats that as #999900

try it and see.

Cleek | Image Toolkits | Thumbnail maker

llp00na1-Jul-05 4:53

1-Jul-05 4:53

I have tested #999 and i found that IE treats it as #090909

Which is bad news for me Frown | :-(

llp00na

C^hris L^osinger1-Jul-05 4:59

C^hris L^osinger

1-Jul-05 4:59

not really.

6 hex digits : ok.
3 digits : ok (#fff = #0f0f0f)
anything else : add zeros to the right side to make 6 digits
word : use a map to find the RGB value

Cleek | Image Toolkits | Thumbnail maker

toxcct1-Jul-05 1:10

toxcct

1-Jul-05 1:10

do you mean hexa into a string ? or hexa into an integer ?

if you want to cast an integer stored in hexa to a decimal, there"s no need to cas, because the hexadecimal is just a representation...

TOXCCT >>> GEII power
[toxcct][VisualCalc]

llp00na1-Jul-05 1:39

1-Jul-05 1:39

All i want to do is to convert colour formats to RGB decimal representation

for example: convert #ff0000 to be (255,0,0)

more complicated cases is when i encounter colours expressed as: #999
or #3333

how do you know which part is red, green, and blue !!!

llp00na

Alexander ^M.,1-Jul-05 2:03

1-Jul-05 2:03

#999 = #000999
#3333 = #003333
Isn't it?

Don't try it, just do it! Wink | ;-)

llp00na1-Jul-05 2:13

1-Jul-05 2:13

#999 = #090909 not #000999 (which are totally different)

#3333 can be #003333 or #033303 or #330303 or ...

you get my point !!!

llp00na

Cedric Moonen1-Jul-05 2:15

Cedric Moonen

1-Jul-05 2:15

llp00na wrote:
#3333 can be #003333 or #033303 or #330303 or ...

So it is impossible to translate to decimal ! You cannot guess what the user wanted to have !! It is purely impossible without some strict rules.

Alexander ^M.,1-Jul-05 2:19