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AMD Releases Open-Source UVD Video Support

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  • #46
    Originally posted by TemplarGR View Post
    I will probably not use it anyway, because software decoding is better quality wise and i have a quad core, but it would be useful for those with laptops and lesser hardware...
    Modern video codecs are integer-based and no matter how decoding is done, the result is exactly the same, bit for bit. There is no quality difference.

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    • #47
      OMG, I just noticed that I could finally have a decent HTPC! Imagine a passively cooled E or even C-Series now working with video accel. I think some fuse in my mind just blew.

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      • #48
        We still don't have complete Bluray support, so I'm not seeing a HTPC in my living room befor a long, long time.

        Anyway it's a very good news to read for (at least partial) open source !

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        • #49
          Originally posted by Calinou View Post
          Firmware is only something that communicates with the hardware, states what it can do, etc. Noone is hurt if it's closed source.
          Can't say what the UVD firmware does (since it's closed source ...), but video decoding "firmware" on NV can do quite a bit. E.g. one of the stages of VP2 seems to be based on an Xtensa processor and you have to write decoding software for it to do anything ... now you might argue that the actual video decoding software part isn't very interesting, but it's surely A LOT of work, at least too much for the current size of the nouveau team (given all the other tasks with higher priority).
          Granted, on the latest cards, the video decoding engines have been cast in hardware and only (?) require command processing firmware that poke the actual registers; not a simple task either ...

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          • #50
            Originally posted by hal2k1 View Post
            FTA:

            So who is going to update the Xorg wiki RadeonFeature page? http://www.x.org/wiki/RadeonFeature

            The Feature Matrix for Free Radeon Drivers currently still says that the feature "Video Decode (XvMC/VDPAU/VA-API) on UVD" is red "ToDo" status. Surely it is "WIP" now
            I tried too, but seems my wiki account has been removed, along with many others (all who are listed with hostnames/IPs/???s in the changelog instead of account names. Likely a casualty of the spam cleanups.

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            • #51
              Originally posted by brent View Post
              Modern video codecs are integer-based and no matter how decoding is done, the result is exactly the same, bit for bit. There is no quality difference.
              It is true that e.g. H.264 decoding is specified to be bit-exact, so any compliant decoder will produce the exact same output as the reference decoder. But some implementations choose to forego compliance for speed.

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              • #52
                Quick question: is this going to make my 4200 mobile card run any faster? Because Unity and Gnome3 still run really slow.
                Last edited by teahopper; 04-03-2013, 07:02 AM.

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                • #53
                  Originally posted by teahopper View Post
                  Quick question: is this going to make my 4200 mobile card run any faster? Because Unity and Gnome3 still run really slow.
                  NO. Only more memory or software tweaks/improvements can do that.

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                  • #54
                    Originally posted by chithanh View Post
                    It is true that e.g. H.264 decoding is specified to be bit-exact, so any compliant decoder will produce the exact same output as the reference decoder. But some implementations choose to forego compliance for speed.
                    Specifications (for H.264/VP8/VC-1/etc) say that decoding MUST be bit-exact. If your implementation chooses to ignore that, it's not a compliant decoder. Of course you can do whatever the hell you want if you ignore specifications, but you can't call it a decoder for a particular codec.

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                    • #55
                      Originally posted by brent View Post
                      Specifications (for H.264/VP8/VC-1/etc) say that decoding MUST be bit-exact. If your implementation chooses to ignore that, it's not a compliant decoder. Of course you can do whatever the hell you want if you ignore specifications, but you can't call it a decoder for a particular codec.
                      Checking if the decoders are compliant is something that could be important as well, actually.

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                      • #56
                        Originally posted by Morpheus View Post
                        We still don't have complete Bluray support, so I'm not seeing a HTPC in my living room befor a long, long time.

                        Anyway it's a very good news to read for (at least partial) open source !
                        It will decode bluray JUST FINE. It just won't decode bluray ***3D*** (which is a retarded fad to begin with).

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                        • #57
                          Originally posted by droidhacker View Post
                          It will decode bluray JUST FINE.
                          From what I know it either needs to be unencrypted one or user needs to get the AACS keys for the disk first if it is encrypted. Not really plug & play method

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                          • #58
                            Enough people support AMD

                            Originally posted by Sonadow View Post
                            Not quite. Have you seem Anandtech's recent review on Haswell's GT2 and GT3 gpu cores? They can reportedly comfortably compete with an Nvidia 650M. With graphics power and nearly full FOSS support, who would choose an AMD setup over an Intel one for HTPCs?
                            I, for one, choose to use AMD based systems. If it does what I need it to do, why not use AMD kit? Also, Intel needs competiton to keep them honest and pushing innovation.

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                            • #59
                              One more reason to support AMD and buy AMD graphic cards instead of Nvidia.

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                              • #60
                                Originally posted by ryszardzonk View Post
                                From what I know it either needs to be unencrypted one or user needs to get the AACS keys for the disk first if it is encrypted. Not really plug & play method
                                That stuff has nothing at all to do with hardware video decoding. At least not on this platform.

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