Blu-Ray playback

[RJVB (René Bertin)]

I'm in the process of improving Blu-Ray playback support, ultimately in VLC but the main work is being done in libbluray and libaacs. I thought it'd be OK if not better to create a single enhancement ticket for this, attaching multiple diffs.

The changes to port:libbdplus and port:libbluray have probably stabilised:

port:libbdplus

• add an explicit depspec for libaacs to avoid opportunistic dependencies
• remove the obsolete --disable-examples configure argument
• fix the livecheck regex

port:libbluray

• upgrade to 1.0.1 (not yet mentioned on the homepage!)
• fix the livecheck regex
• add ${prefix}/lib to the internal dlopen search path
• remove obsolute --enable-udf option and enable building the example (the bd_info utility)
• add a +bdjava variant which is required for supporting java-based menus in VLC

The latter was a bit tricky: building the variant requires having a JDK installed (AFAIK only Oracle provides a working one for Mac). Just running would of course work with a JRE but there's a catch-22 there. The only JRE I know of (JavaAppletPlugin) is also provided by Oracle. I'd love to propose making +bdjava the default because why install this port if you're not interested in Blu-Ray playback. But that would require raising an error if that JavaAppletPlugin isn't installed (the build will fail out of itself if no JDK is installed).

[RJVB (René Bertin)]

A companion patch (including an upgrade) to port:libaacs is in preparation; everything doesn't work yet.

NB: actual playback of BDs requires downloading and installing a file with keys and the like, following online instructions. I'll be putting a link to instructions in the port notes, not to the file itself.

[jeremyhu (Jeremy Huddleston Sequoia)]

Why remove --disable-examples? IIRC, the example code is not installed.

[jeremyhu (Jeremy Huddleston Sequoia)]

Otherwise, it all looks fine to me.

Does MP actually work reasonably well on linux? I wouldn't expect that...

[RJVB (René Bertin)]

Replying to jeremyhu:

Why remove --disable-examples? IIRC, the example code is not installed.

That's because there isn't any, and the option raises a warning ;)

MP as in Blu-Ray (BD) playback? Actually, I'd say it works best there with these projects, which probably isn't surprising since they're mostly developed there.

A propos, my grappling with libaacs has to do exactly with that: BD playback apparently requires drive access using the MMC protocol to get at certain encryption key details. I'm getting a strong impression that IOKit only supports that for writer devices, not for playback-only (= I can get the MMDevice IOCFPlugin for my internal "SuperDisk" but not for my USB BD-Rom player). I'd appreciate pointers to get around that, if anyone has an idea. (Details are in libaacs's file/mmc_device_darwin.c).

In short, the current state of affairs is that BD playback in VLC works on Mac (as on Linux), but only when I copy the disc's aacs/vuk cache entry over from Linux.

[RJVB (René Bertin)]

Confirmation of my MMC analysis, and a suggestion that it should be possible to work around the crippled IOKit API:

​http://www.makemkv.com/osxmmc/

Sadly that's not a FOSS project...

[RJVB (René Bertin)]

Going a bit beyond what I'd thought: uploading a new port:aacs_updater, a port of the AACS Updater utility from labDV.com .

This little tool allows you to synchronise your local KEYDB.cfg file with a remote database, downloading new entries provided by others and possibly uploading any new entries libaacs may have registered locally (= the feature that currently doesn't work on Mac). Ported from Win32 by yours truly.

[RJVB (René Bertin)]

port:aacs_updater

[ken-cunningham-webuse]

In 53afd6a72ac0e7ee051c44f40ed1699b1392db1c/macports-ports (master):

libbdplus: explicitly add libaacs

was opportunistically linking previously
see: #54661