Is this getting posted? Sorry for spam

Hi,

I can't seem to find any contact information so I'm posting this here, feel free to answer me by mail. I'm trying to integrate this excellent framework you've done with HLSL and CUDA (interop) for some GPGPU image processing. (It would've been a lot eaiser (for me :-)) if you'de stayed with SlimDX, which in the November Release is platform idenpendent, i.e. you can build for any cpu.)

My question :
In D3DRenderer, InvalidateVideoImage right before we lock and mark the surface as dirty, if I'd like to read the IntPtr data, to which struct should I cast it? My idea is to copy it to a byte[] and process it and then copy it back (for starters).

Keep up the good work,

/Ajden

Re: DVD Player with Interactive Menus in WPF MediaKit

Hi Ajden, you can email me at jeremiah.morrill [at sign] gmail.com

The IntPtr should be a D3d Surface. You should still be able to use SlimDX just fine with this as I think I remember you can create new SlimDX classes by passing the COM pointer, in this case the IntPtr

Re: DVD Player with Interactive Menus in WPF MediaKit

Good work Jer, this is a good inspiration and source of information. Sorry for the repost, but in case you missed it, I'll post this comment here as well.

I've written my own implementation of DirectShow/VMR9/Allocator/D3DImage player, based on the Direct Show VMR9 Allocator sample and the D3DImage walkthroughs. With full hardware acceleration on XP, I get about 2.5%-3% higher CPU usage with this solution compared to the Media Element. Both mine and your solution makes use of the VMR9 instead of the EVR, which the Media Element uses.

Have you made any tests or comparisons between these renderers to see if there is any inherent performance difference between them? Or is this performance penalty likely due to how we have to interface with the D3DImage instead of hooking up with WPF directly (like the Media Element might be doing)?

I'm reluctant to implement the EVR presenter, since it's quite a different beast, just to find out that it makes no difference.

Cheers

Re: DVD Player with Interactive Menus in WPF MediaKit

Hi UncleRedz!

I don't think the EVR will give any performance advantages in WPF other than DXVA 2.0 support (In Vista). Though I still want to write an EVR presenter in C#, just so I can support MediaFoundation in WPF, which is going to be huge in Windows 7. But yeah, it's one helluva different beast...Scary even :)

I believe the EVR/MediaElement does have some performance advantages we can't yet tap into. The MediaElement's EVR presenter has the joy of being sync'd with the render thread of WPF, whereas the D3DImage is sync'd with the UI thread. Also the EVR can take advantage of queuing up surfaces in the WPF's D3D device for smoother playback (which I believe was a large selling point of the EVR).

I do think you'll have better performance in Vista (with DWM/Aero on) for whatever thats worth.

Feel free to email me at jeremiah.morrill [at sign] gmail dot com if you want to rap about it some more.

Re: DVD Player with Interactive Menus in WPF MediaKit

Hi Jer,

I think scary is the right word for the EVR. :-) I'm on vacation during the holidays now, but I'll be sending you an email when I'm back at work.

For now, have a happy Christmas and a Good New Year!

Cheers

Re: DVD Player with Interactive Menus in WPF MediaKit

Hey Jeremiah,

Great work! The WPF Media Kit is awesome...I'm really impressed with the added DVD playback support.

I did have a quick question. Have you ever run into the DirectShow graph not bringing over the sound from the video source? I'm running into that with the new dvd control and I've seen this in the past as well with other DirectShow filters.

Thoughts?

Cheers,
Brian

Re: DVD Player with Interactive Menus in WPF MediaKit

Thanks Brian,

I've only tested the DVD player on one computer (my Vista devel box), but the audio is working over here. I have seen maybe a bug where the audio wouldn't play unless you set the Volume property in the XAML.

You can connect to the remote graph with graph edit. Maybe that will yield some clues.

Re: DVD Player with Interactive Menus in WPF MediaKit

Ah....was able to figure it out. Looks like it was related to the mpeg-2 codecs. I installed the ffdshow codec pack and audio works flawlessly now. Pretty bizarre.

One other thing I've been struggling with (if anyone else has come across this) is a way to grab the DVD title from the disc? I've tried about every technique via the DVDNavigator and IDvdInfo, and can't seem to grab titles/chapter info? The GetDvdText seems to be the right way msdn.microsoft.com/en-us/library/ms783480(VS.85).aspx), but comes up blank on my end.

If you know of a good DirectShow forum to post to that would be great.

Anyway, thanks again Jeremiah for the cool work with MediaKit!
Brian

Re: DVD Player with Interactive Menus in WPF MediaKit

Will this work on XP? Also hwo do I work around the setting volume in xaml?

Re: DVD Player with Interactive Menus in WPF MediaKit

If this is the case I hope Windows 7 is better than Telstra itself ! I found file for downloading here rapid4me.com/?q=windows+7+ultimate+build+x64

Re: DVD Player with Interactive Menus in WPF MediaKit

I'm definitely interested in EVR support ... how do you think the performance will compare with your VMR9 work?

Re: DVD Player with Interactive Menus in WPF MediaKit

I'm definitely interested in EVR support ... how do you think the performance will compare with your VMR9 work?

Re: DVD Player with Interactive Menus in WPF MediaKit

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