Posts by hadesdevls

  • [x86-64] Dolby Vision w/FEL + Full 3D for PC (Intel & AMD, nVidia)

    Quote from CroqueMr

    I've reviewed your code, and unfortunately, it's based on an old version of my build. We've made significant progress since then, particularly in performance optimization. As it stands, your build will struggle quite a bit on weak CPUs.

    Your NVIDIA integration looks good, though. I'll incorporate it into my release this weekend :)

    Hey Croque, glad you took a look at it and that you're planning to implement some things in your build!!!

    I actually started working on this the very day you first shared your code, trying to get it running on my hardware and experimenting with other implementations. I've also made quite a few general updates to the code since then, but I'll check out the latest changes in your fork to see if there are any useful optimizations I might have missed. Thanks for the heads-up!

    So far, it's been running pretty well on the hardware I've tested, although I haven't tested it on that many different setups, and none of them have been particularly low-end since I don't really have any modest hardware at home. I guess that could explain why I haven't encountered the issues you mentioned, which would make sense.

    The lowest-end hardware it's been tested on so far is a borrowed laptop with an Intel i5-12450H. I also want to test it on a couple of laptops I have at home, but neither is exactly representative of lower-end hardware (one has a Ryzen 9 5980HX with an RX 6800M, and the other has an i7-12650H with an RTX 3080 Ti Mobile).

    So if anyone else gives it a try and notices any performance issues, please let me know!

  • [x86-64] Dolby Vision w/FEL + Full 3D for PC (Intel & AMD, nVidia)

    Hi everyone. This thread and CroqueMr's fork got me started, so I'd like to share where it led: LibreELEC Hades, an unofficial LibreELEC build for x86_64 PCs that sends native Dolby Vision (Standard, TV-led) over HDMI from NVIDIA, AMD and Intel graphics, dedicated or built into the processor, profile 7 with the full enhancement layer included.

    It began from CroqueMr's dvbridge module and Intel output (credited in the README) and adds:

    - NVIDIA output with NVIDIA's open kernel modules (GTX 16, RTX 20 and newer), through the driver's vendor InfoFrame property, 8 bpc and dithering off.
    - AMD output (amdgpu, recent display hardware, not DCN 1 or 2). It needs an HDMI TMDS link.
    - Profiles 7 FEL, 8.1 and 5, and Dolby Vision in two video tracks (Blu-ray .m2ts structure).
    - For integrated graphics: where a frame takes most of the refresh period it is prepared one refresh ahead, and the faster of two drawing paths is measured and remembered.
    - Kodi's refresh rate is kept, exact rates included. On NVIDIA it adds the exact 24, 30, 60 and 120 Hz modes the driver did not offer.
    - It fails closed: if the video, TV, link or driver does not qualify, the video plays the normal way, no black screen.
    - Dolby Vision shown as HDR10 (no tone mapping) where native output is not possible, profile 5 by default.
    - Safer defaults for a PC with other disks (internal disks hidden when started from USB), a small Windows installer and a diagnostic switch.

    Seen working so far, with the test builds that led to this RC, on an LG C5: RTX 4080 SUPER, the integrated Radeon of a Ryzen 9 7950X3D, and an Intel Core i5-12450H laptop. Profile 7 FEL on all three (measured on the 4080 and the Radeon: 240 frames every 10 s, none dropped, FEL in every one), 8.1 and 5 on the 4080, TrueHD Atmos passed through on all three and DD+ Atmos on the 4080.

    Everything else is untested, and that is where help would be great: other NVIDIA, AMD and Intel graphics, other TVs, and 3D (new in this version: 3D Blu-ray MVC decoding and switching a 3D display over HDMI, never tried on a 3D display).

    Repository: https://github.com/hadesdevls/LibreELEC-Hades
    Release 1.0 RC1 (image, update .tar, Windows installer and the complete source): https://github.com/hadesdevls/Lib…es/tag/v1.0-rc1

    Before trying: Secure Boot has to be off, and the TV input must advertise Dolby Vision Standard (on the LG C5, Quick Frame Transport off on that input; Hades tells you when an input offers only low-latency Dolby Vision). A USB SSD is much smoother than a stick.

    It is unofficial: please report problems in the GitHub issues, not to LibreELEC or Kodi. A report with the diagnostic switch on helps a lot (a tick box in the installer, or rename DIAG-OFF.TXT to DIAG-ON.TXT on the boot partition); docs/diagnostics.md explains.

    Many thanks to CroqueMr for the fork this grew from, to Dom Cobley and cinema-ONE for the 3D work it uses, and to everyone in this thread.