Re: Query on Windows CE Video Renderer related to MaxBackBuffers!

Hi,

When we set IMemAllocator::SetProperties() during the
CBaseOutputPin::DecideBufferSize(),
video renderer allocator returns the actual properties matching my
properties. But still it does not take them into account.

It always seems to work with a single RGB offscreen surface.

Where as in case of GDI and other modes (DirectDraw overlay) it is
respecting the MaxBackBuffers registry setting.

Regards

On May 8, 8:44 pm, "Alessandro Angeli" <nob...@xxxxxxxxxxxxxxxxxx>
wrote:
From: "mailto...@xxxxxxxxx"

There is no effect of setting the allocator properties in
CBaseOutputPin::DecideBufferSize, as VR seems to ignore
these properties.
So it always returns the same surface/buffer to the
upstream filter.

When you call IMemAllocator::SetProperties() during
CBaseOutputPin::DecideBufferSize(), you will be told what
the actual properties are. If you request more than 1 buffer
but the result is 1, then the renderer can only supply 1
buffer.

--
// Alessandro Angeli
// MVP :: DirectShow / MediaFoundation
// mvpnews at riseoftheants dot com
//http://www.riseoftheants.com/mmx/faq.htm

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