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 <[email protected]> wrote: > On Fri, Oct 19, 2018 at 8:53 AM 孫偉程 <[email protected]> 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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