[AG-TECH] Hi-quality video

[Jay Beavers]

Samples are in the DirectX SDK which is part of the Platform SDK.
Platform SDK for Windows XP RC1 has the latest DirectX 8.1 SDK.

 

NullNull is a sample that does what you want.  You should put your
receiver code in the Transform() function where you receive a
IMediaSample object.  IMediaSample.GetPointer will get the pointer to
the block of memory.  The DirectShow Filter Graph Manager will call into
the Transform() function with the data.

 

In addition to this sample, you will also need code to control the
Filter Graph Manager.  You can use the GraphEdit utility for this while
debugging or you can look at the PlayWnd sample for C++ code to do this.
I can also supply you with C# sample code to do this, if you're feeling
a little DotNet today ;-)

 

 - jcb

 

-----Original Message-----
From: Robert Olson [mailto:olson at mcs.anl.gov] 
Sent: Monday, July 23, 2001 3:07 PM
To: Jay Beavers; Todd Needham
Cc: Andy Quay; ag-tech at mcs.anl.gov
Subject: RE: [AG-TECH] Hi-quality video

 

At 10:34 AM 7/23/2001 -0700, Jay Beavers wrote:



I ll be happy to supply you with whatever direct assistance you need
with using the DirectShow APIs.  Not only does this abstract the details
of VfW and WDM drivers, it provides you a nice clean sample through the
IMediaSample interface.  To see how to do this easily, I d recommend
going through the NullNull sample that comes with the DirectShow SDK
which simply passes the IMediaSample to you and does nothing with it.


>From what I can tell (I'm waiting for the MSDN site to unhang while my
CDs load. Argh, the sample isn't there on the website, and apparently
not in the MSDN library either) the NullNull example is just a filter
that doesn't do anything. The example I'm looking for that I've not seen
yet is a vanilla C++ app that instantiates all the DirectShow bits of
stuff so that I can get callbacks to my vanilla C++ code with the frames
as they become available. Or I can call to the code get the next frame,
either way. 

--bob

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