[Nouveau] 8K HEVC decoding with NVIDIA GeForce GTX 1060

[孫偉程]

Dear Ilia,

Thanks for your reply. The works seem complicated.
To the best of my knowledge, at a high level for building my 8K HW decode
enabled Android OS, I need to do the following.

1. Extract firmware from the NVIDIA binary driver.
2. Make a customized kernel with the extracted firmware.
3. Replace Android-x86's kernel with the customized kernel.
4. Add libdrm, DDX, Mesa & libVDPAU to Android-x86 for userspace
implementation.
5. Build the customized Android-x86 image.

Is there something I am missing or misunderstanding? Thank you!

Best regards,

Victor

On Fri, 19 Oct 2018 at 21:09, Ilia Mirkin <imirkin at alum.mit.edu> wrote:

> On Fri, Oct 19, 2018 at 8:53 AM 孫偉程 <dmvictor at gmail.com> wrote:
> > I can imagine there is a long way to go to fulfill my requirements. But
> I know a driver for my NVIDIA card is a must for the hardware decoder to
> work. Can somebody shed some lights that if I want to play an 8K HEVC
> encoded video on Android-x86 with NVIDIA's decoder enabled, what should I
> do in this project? And how to start?
>
> The steps are straightforward, although each one of them is fairly tricky.
>
> 1. Load decoding firmware into the engine
> 2. Hook up engine "servicing" (like interrupts, channels, etc)
> 3. Figure out the how the commands work, what data they require, how
> that data is formatted, etc.
> 4. Sit back and enjoy some 8K HEVC video.
>
> In VP3/4/5, there are 3 stages to decoding -- BSP (bit-stream
> processor), VP (video processor), and PPP (post-processing
> processor?). Starting with VP6, we believe these got integrated into a
> single engine. However not much more is known. I have a vague notion
> that the way the data is passed in hasn't really changed much,
> although obviously for HEVC it will have as that's a new format.
> Perhaps it's all even simpler now if you don't have to drive the
> VP/PPP independently. But perhaps you still do and they're just all in
> a single engine. I haven't so much as looked at a command stream...
>
> Loading the firmware could be a drag on GM20x+ -- if you have to deal
> with secure mode, it'll be a huge pain. You will also have to locate
> the firmware, which is no longer quite as easy as it once was, I think
> the GPU will DMA it from system memory now as opposed to it being
> uploaded directly in the mmiotrace. I've created a "scanner" tool
> which looks through the blob for firmware-looking things.
>
> Cheers,
>
>   -ilia
>
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