avstream avssamp example freeze system

device driver

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avstream avssamp example freeze system

Postby Tulup » Thu, 19 Apr 2007 23:16:29 GMT

Hello.
Using matlab+simulink (under mex setup VS2005) as a client application for 
capturing video from DDK sample avssamp totally freeze windows (Vista, XP). 
The mouse cursor doesn't move, nothing is move at all.
At the same time Avssamp is fine when capturing with Amcap, and fine if 
matlab mex setup is VS2003.NET, also matlab is fine with vs2005 when 
captureing from {*filter*}era...

Tried using avsamp debug version with dbgPrintf+dbgview - i can't see any 
out message, system is freezed before any message occurs.
Tried run with verifier ON, nothing!

Could anybody advise how to debug this strange avssamp behaviour?
Thank you.

-Andrey 



Similar Threads:

1.avstream sample freezes system

hello,
i'm already wrote about this problem with no reply.

building avssamp example and using it with some client app freeze xp and 
vista (this app is works well with real cameras). i can't find a way to 
figure out what is the problem with, because bsod is not happening, just 
mouse cursor is freezes and system is stall :( no error logs found on 
reboot.

-Andrey 


2.AVStream avshws DDK example

I'm playing around with avshws to learn AVStream.  avshws shows up in the
"WDM Streaming Capture Devices" category in GraphEdit.  I'd like the driver
to appear in "Video Capture Sources" as well.  I have some ideas as to how
this might be done, but I'd like to get a deeper understanding.  Any info is
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AMCap only enumerates CLSID_VideoInputDeviceCategory devices, as do most
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video capture card should belong to?  What is the difference between
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4.system freeze after memory access

Hi,
i want resize a memory area of my selfmade PCI card.

I do the following:

- grap the IRP_MN_FILTER_RESOURCE_REQUIREMENTS request
- send it to the underlaying driver (synchronous)
- modify the size of one memory area (PCI told me there are 0x400 bytes, i 
only want 0x200 bytes)
- complete the IRP

The IRP_MN_START_DEVICE request, which i receive later, gives me the 
modified resources.
The whole driver works fine at three of my test machines.

One machine shows a strange behavior. I see, that the size of the memory 
area is modified
(the length is 0x200 instead the original 0x400 bytes). The following call 
to MmMapIoSpace
returns without error (returns pointer != NULL).
If i use this pointer, the system freezes.

In this case the revision and version numbers of the partial resource list, 
which i get at IRP_MN_START_DEVICE request,
are 0 instead of 1.

All machines use Windows XP with service pack 2. The "error" machine uses an 
english XP version.
The driver is compiled with the DDK version 3790.1830.

Some additional informations:
My PCI card uses more than one memory and i/o resources. At least there are 
three device drivers,
to support the whole functionality of this card. The resources are divided 
using MF.SYS.

Any ideas?

Thanks in advance,
Roman Jordan 


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