How to Sync between DWM and Movie TV.

Question

How to Sync between DWM and Movie TV.

JY 0

For video playback on Movie TV,

One frame after VPP and then send to DWM, how to ensure vpp has done before DWM to present this frame?

2 answers

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Answer 1

S.Sengupta 24,476 MVP

DirectX uses fences, which are synchronization objects that signal when a specific operation (like VPP processing) is complete. DWM can wait on the fence before presenting the frame, ensuring VPP finishes first.

Here are some resources that might be helpful, although they might not be Movie TV specific:

DirectX Fences: https://learn.microsoft.com/en-us/windows/win32/direct3d12/fence-based-resource-management
Windows DWM: https://learn.microsoft.com/en-us/windows/win32/api/_dwm/

JY 0 Reputation points

2024-05-16T02:08:05.4966667+00:00

Thanks，I know that fence for sync, in DX12, because the app is responsible for sync between different engine and include cmd submit and so on, so app control them explicitly.

But in DX10, i think the sync operation is responsible for driver. And i add signal sync object after VPP, wait sync object before present call. It seems still have tearing issue, besides, i want to confirm whether need to add process mutex in driver.

Answer 2

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How to Sync between DWM and Movie TV.

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