[x86-64] Dolby Vision Development for PC (Intel & AMD)

Quote from dangerouslaser

Yes - you can integrate my changes!

edit:

One thing I have been trying to figure out is how we can scale the FEL layer with nearest neighbor. Based on my reading, that seems to be how the mediatek chipsets in the high-end UHD players scale the layer. Unfortunately neither vaapi or qsv has an out of the box nearest neighbor scaling option. It is possible to do it with the CPU - but then we lose the performance gains from offloading this upscale to the GPU.

I am not entirely sure how much of a difference it actual makes but some people have complained about chroma and tearing issues when upscaling with bilinear etc.

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My minimum target CPU is the N95/N100, if with your optimization and the asynchronous frame preparation I see again some frame droping I will investigate on that, but I am pretty sure it will be sufficient for Native DV.

Today N100 is almost perfect for DV vanilla, but stutter and frame drop a lot when you activate any custom profile (DV Enhanced etc...) a huge optimization will be necessary. I think to be able to cover all profile

Edit : Unfortunately using VAAPI to upscale FEL layer has an small impact on the picture, I will try to see if it's visible, and the planar output is very complicated to integrate to my new engine, I will work on it tomorrow.

yeah any upscaling of FEL that isn't nearest neighbor won't exactly match what an oppo / panasonic outputs. libplacebo uses lanczos for the upscale which is expensive for the CPU and still doesn't match exactly.

Quote from CroqueMr

Could you send me the kodi.log file? I ramped up the fallback mechanisms so that even devices without DV support could use the build and play DV content via HDR10, I might have been a bit too aggressive with that.

Ok, here it is.
Click to download files: https://file.kiwi/0276153b#lIuT9DXvgLIcryhRyFxgkw

I just got an N150 box, so I will get to work tonight / tomorrow.

Quote from ht2tweak

Amazing work CroqueMr:

Zero dropped frames vs N150:

Incorporate cinemaONE's 3D work, and this will be magic🪄☺️! I'll most likely switch from Amlogic boxes as my daily driver.

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Thank you.

Many things need to be fixed and will be adressed this week.

- Profile 5 not working

- Some fallback too agressive

- enhanced rendering unstable

- Performance for small iGPU

Since some module are in GPLv3 cinemaONE can not integrate the DV in his build, but I'll give it a shot in the DV build. I will see if it is simple to integrate that

Quote from dangerouslaser

I just got an N150 box, so I will get to work tonight / tomorrow.

I will be easier for you to optimise and see by yourself the frame drop issues. I will follow closely your work.

Quote from CroqueMr

Since some module are in GPLv3 cinemaONE can not integrate his work, but I'll give it a shot.

That would be great, and you're very welcome to. Everything is public, as four commits on top of LibreELEC master of 2026-09-30: https://github.com/cinema-ONE/Lib…ound36-20261001

• linux: amdgpu patches 0100-0107 (HDMI 3D modes, RGB range, FRL, DCI 4K60)
• ffmpeg: popcornmix's H.264 MVC decoder
• kodi: popcornmix's 3D stack on Kodi 22.0 RC1 plus my 3D and subtitle fixes

The FFmpeg and Kodi parts don't depend on the GPU. The kernel patches are amdgpu only; I've tested them on an RX 7600, and ht2tweak ran an earlier round on a Ryzen 5800H APU. Intel is untested. If something doesn't apply or misbehaves, ping me and I'll help.

Prepared with Claude Code (Anthropic)

Quote from cinemaONE

That would be great, and you're very welcome to. Everything is public, as four commits on top of LibreELEC master of 2026-09-30: https://github.com/cinema-ONE/Lib…ound36-20261001

• linux: amdgpu patches 0100-0107 (HDMI 3D modes, RGB range, FRL, DCI 4K60)
• ffmpeg: popcornmix's H.264 MVC decoder
• kodi: popcornmix's 3D stack on Kodi 22.0 RC1 plus my 3D and subtitle fixes

The FFmpeg and Kodi parts don't depend on the GPU. The kernel patches are amdgpu only; I've tested them on an RX 7600, and ht2tweak ran an earlier round on a Ryzen 5800H APU. Intel is untested. If something doesn't apply or misbehaves, ping me and I'll help.

Prepared with Claude Code (Anthropic)

Thanks a lot, yes I can integrate but I am not able to test deeply since I do not have any 3D TV, your help will be more than useful.

I finish to implement last optimisation and move to incorporate your build.

I found some great adjustement that do not deteriorate pictur quality. Now the N100 is able to handle profile 7 FEL remux without any frame drop and have a small headroom to cover also DV enhanced profil.

Unfortunately DV <-> HDR10 convertion are not possible yet on the N100 you need a better iGPU

dangerouslaser my build with important improvement including the asynchronus frame management will be push around 10PM Paris time. I am finalizing the tests

CroqueMr when you iron out all of the issue's (n100, 3d, etc etc etc), can i make a request?

i would like to see support for bdmv and iso in dv fel format 😀.

right now is bdmv and iso only in hdr10.

thanks a lot for everyone for their efforts making this happen. thank you all

Quote from testmest

CroqueMr when you iron out all of the issue's (n100, 3d, etc etc etc), can i make a request?

i would like to see support for bdmv and iso in dv fel format 😀.

right now is bdmv and iso only in hdr10.

thanks a lot for everyone for their efforts making this happen. thank you all

In R1.0.0 beta1 it has been fixed.

But I saw yesterday one small use case to fix, following the last film displayed sometime a Kodi will pick up the HDR10 track from the Iso, A reset is not operating correctly. I already fixed it in my internal build, it will be pushed in few hours