[libbluray-devel] Can I help out with development of BD-J support?

[Roald Strauss]

Hello all,


Apologies if I'm not bringing anything new to the party.
I confess I haven't read any previous mails on this mailing list.

I have a big geeky interest in BD-J development, i.e. developing Java 
Xlet that runs on Blu-ray players.

For about 3-4 years (I've lost count) I've been working on a geeky 
project I'm calling "8bit Stories".

It is a kind of diskmag, or at least a diskmag-like creation for blu-ray 
players.
In short, I'm writing a bunch of stories about the old retro computers I 
experienced as a child, and presenting them in a diskmag-like GUI 
running on Blu-ray players.

The idea is that people can enjoy this eBook/diskmag-like creation in 
the couch in their livingroom using a hardware blu-ray player, or 
infront of their computerscreen using a software blu-ray player.
There are plenty of (commercial) software players available for Windows. 
But I'm using Linux, so I'm excited to see BD-J support being 
implemented for libbluray so my creation can be played with software 
players like VLC and Kodi.

I'm rather passionate about this project, which is why I have bought 
several Blu-ray players to test on, and burned unbelievably many discs 
just to test. At the moment I have about 10 different hardware blu-ray 
players in the house, and have tested on at least 10 other hardware 
players while visiting various shops.
During this quest I have of course found (weird) bugs on some players 
and then fixed those. At the moment my engine works on all players I 
have tested on.

But not VLC... (haven't tried Kodi, but I assume it'll be the same).
VLC returns errors, that I'll paste in a moment.
These errors are shown when trying 3 different Blu-ray folders:
- Snake Xlet, downloaded from somewhere I don't remember
- Funky Fresh BD-J demo, https://www.youtube.com/watch?v=M_E9VaXywG0
- My own project "8bit Stories"

Is there anything I can help out with as a BD-J Xlet developer? Please 
let me know.
I would love my BD-J project "8bit Stories" to be runnable with VLC and 
Kodi when it's done.
Although I've spend an enormous amount of time (and way too much money 
too) on this project, my plan remains to release it for free as an ISO 
file people can burn themselves - or watch using a software player like 
PowerDVD, VLC or Kodi.


Roald Strauss
Mr.Lou / Dewfall Productions



Command: vlc bluray:///path/to/blu-ray/folder/ --bluray-menu

VLC media player 2.0.8 Twoflower (revision 2.0.8a-0-g68cf50b)
[0x92ea8f0] main libvlc: VLC kører med standardgrænsefladen. Brug "cvlc" 
for at køre VLC uden grænseflade.
libbluray/bdj/bdj.c:128: Opening 
/usr/lib/jvm/java-7-oracle/jre/lib/i386/server/libjvm ...
[0xb210bde8] libbluray demux: First play: 1, Top menu: 1
HDMV Titles: 0, BD-J Titles: 1, Other: 1
libbluray/bdj/bdj.c:128: Opening 
/usr/lib/jvm/java-7-oracle/jre/lib/i386/server/libjvm ...
libbluray/bdj/bdj_util.c:95: Failed to register native methods for class 
org/videolan/Libbluray
Exception in thread "main" 
PrintStream.java:java.io.PrintStream.println:823: 
java.lang.NoSuchMethodError: Method 
org.videolan.Libbluray.getTitleInfoN(JI)Lorg/videolan/TitleInfo; not found

libbluray/bdj/bdj_util.c:86: Failed to locate class java/awt/BDGraphics
Exception in thread "main" 
PrintStream.java:java.io.PrintStream.println:823: 
java.lang.UnsatisfiedLinkError: 
java.awt.BDFontMetrics.resolveFontN(Ljava/lang/String;I)Ljava/lang/String;

PrintStream.java:java.io.PrintStream.println:823:     at 
java.awt.BDFontMetrics.resolveFontN(Native Method)

PrintStream.java:java.io.PrintStream.println:823:     at 
java.awt.BDFontMetrics.addSystemFont(BDFontMetrics.java:65)

PrintStream.java:java.io.PrintStream.println:823:     at 
java.awt.BDFontMetrics.initSystemFonts(BDFontMetrics.java:100)

PrintStream.java:java.io.PrintStream.println:823:     at 
java.awt.BDFontMetrics.init(BDFontMetrics.java:119)

PrintStream.java:java.io.PrintStream.println:823:     at 
java.awt.BDFontMetrics.getFontList(BDFontMetrics.java:195)

PrintStream.java:java.io.PrintStream.println:823:     at 
java.awt.BDGraphicsEnvironment.getAvailableFontFamilyNames(BDGraphicsEnvironment.java:43)

PrintStream.java:java.io.PrintStream.println:823:     at 
java.awt.Font.setFamily(Font.java:262)

PrintStream.java:java.io.PrintStream.println:823:     at 
java.awt.Font.<init>(Font.java:210)

PrintStream.java:java.io.PrintStream.println:823:     at 
java.awt.Font.<init>(Font.java:45)

PrintStream.java:java.io.PrintStream.println:823:     at 
java.awt.BDGraphicsBase.<clinit>(BDGraphicsBase.java:42)

libbluray/bdj/bdj.c:304: Couldn't register native methods.
Exception in thread "main" 
PrintStream.java:java.io.PrintStream.println:823: 
java.lang.NoSuchMethodError: init

libbluray/bdj/bdj_util.c:65: Failed to locate class 
org/videolan/Libbluray method init (JLjava/lang/String;)V
libbluray/bluray.c:1781: bd_read(): no valid title selected!
[0xb210bde8] libbluray demux: Closing overlay.