How to use VCam Filter in FlashPlayer inside browser ?

[ttbao]

Hi All,

I've been hurting my head for some weeks , please any one give me some
help.

I want to write a desktop screen capture filter for FlashPlayer inside
browser.
I've got VCam Filter from TMH's Download page (http://tmhare.mvps.org/
downloads.htm),
in Filter.cpp CVCamStream::SetFormat(AM_MEDIA_TYPE *pmt) , comment out
the line
m_mt = *pmt
as disscused in
http://groups.google.com/group/microsoft.public.win32.programmer.directx.video/browse_thread/thread/e815d6bc4680a11e/521ef66bc15093eb?lnk=gst&q=Flash+Player#521ef66bc15093eb
then the flash player inside browser displays colored dots, means that
it works OK.

After that, I modified CVCamStream::FillBuffer method to fill in data
buffer
by bitmap of desktop screen, but it works only with 320x240 size, but
I want
to capture a specified area of desktop screen. It seemed that Flash
player
inside the browser require 320x240 output size.

I tried with some change the following parameters in
CVCamStream::GetStreamCaps
and CVCamStream::GetMediaType method, but it didn't work.
pvi->bmiHeader.biWidth = 80 * iPosition;
pvi->bmiHeader.biHeight = 60 * iPosition;

Or, is it necessary to change parameters of VIDEO_STREAM_CONFIG_CAPS
in
CVCamStream::GetStreamCaps method ???

Below is my code in FillBuffer method.

VIDEOINFOHEADER *pVih = (VIDEOINFOHEADER*)m_mt.pbFormat;
HDC hDC;
hDC = CreateDC(TEXT("DISPLAY"), NULL, NULL, NULL);
RECT m_rScreen;
m_rScreen.left = m_rScreen.top = 0;
// m_rScreen.right = 320;
// m_rScreen.bottom = 240;
m_rScreen.right = GetDeviceCaps(hDC, HORZRES);
m_rScreen.bottom = GetDeviceCaps(hDC, VERTRES);

HDIB hDib = CopyScreenToBitmap(&m_rScreen, pData, (BITMAPINFO *)
&(pVih->bmiHeader));

if (hDib)
DeleteObject(hDib);

DeleteDC(hDC);

BTW, it works in GraphEdit if I changed in CVCamStream::GetStreamCaps
and CVCamStream::GetMediaType method like this, then in FillBuffer
copy
to pdata my full screen bitmap:
pvi->bmiHeader.biWidth = 1024;
pvi->bmiHeader.biHeight = 768;

Can any one give me help on this issue, I'm in deep trouble.
Any help would be appreciated.

Thanks very much.

[The March Hare [MVP]]

On Sun, 16 Dec 2007 19:24:48 -0800 (PST), ttbao wrote:

> I want to write a desktop screen capture filter for FlashPlayer inside
> browser.

FYI: Replied to in the Vista dshow forum.

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