A colleague has pointed out that https://github.com/rudihorn/drm-vc4-grabber exists.
Whilst designed for Hyperion, it extracts the information on the current plane(s) from DRM, maps those into the application, and therefore has access to the image data in the native format. If you're using multiple planes then you'd need to combine them together appropriately.
I'm slightly surprised that you can work backwards to the source buffer, as that is a bit of a security risk to be able to snoop on displays.
Whilst designed for Hyperion, it extracts the information on the current plane(s) from DRM, maps those into the application, and therefore has access to the image data in the native format. If you're using multiple planes then you'd need to combine them together appropriately.
I'm slightly surprised that you can work backwards to the source buffer, as that is a bit of a security risk to be able to snoop on displays.
Statistics: Posted by 6by9 — Tue Nov 12, 2024 1:10 pm