windows7中的硬件加速缩放MFT

Question

I am searching hardware accelerated(GPU) based video scaling.I found a extensive discussion in following threads
How to use hardware video scalers? and
Hardware Accelerated Image Scaling in windows using C++

I try to stick with MFT based scaling because i also using H.264 Encoder MFT in my application.
We have two option for MFT based solution-
1. Video Resizer DSP
2. Video Processor MFT

But both these methods used MF_SA_D3D_AWARE . As mentioned below:
A video MFT has the attribute MF_SA_D3D_AWARE .aspx which can be used to query whether it supports DirectX 3D hardware acceleration, and this can be enabled by sending it the MFT_MESSAGE_SET_D3D_MANAGER message.
and MF_SA_D3D_AWARE is supported in Windows 8 onwards.

Is their any MFT for scaling which uses Hardware acceleration in windows 7 ?

I haven't investigated other two options(MFCreateVideoRenderer and IDirectXVideoProcessor::VideoProcessBlt) mentioned in How to use hardware video scalers? that it will support in windows 7 or not. But I am actively looking for MFT option on priority.

Answer 1

Under Windows 7, i will recommand you to use IDXVAHD_VideoProcessor

You have a sample here : DXVA-HD Sample

But i think that if you use a simple DirectXDevice9 with a DirectXTexture9, the scaling result will be the same. There is no reason that dedicated scaling process only apply to video file process. I think they are the same for both (game and video file).

The lonely thing i saw, is that you can setup the constriction mode : DXVAHD_BLT_STATE_CONSTRICTION_DATA , wich apply to downscaling, not really to upscaling.