About Me

Michael Zucchi

 B.E. (Comp. Sys. Eng.)

  also known as Zed
  to his mates & enemies!

notzed at gmail >
fosstodon.org/@notzed >


android (44)
beagle (63)
biographical (104)
blogz (9)
business (1)
code (77)
compilerz (1)
cooking (31)
dez (7)
dusk (31)
esp32 (4)
extensionz (1)
ffts (3)
forth (3)
free software (4)
games (32)
gloat (2)
globalisation (1)
gnu (4)
graphics (16)
gsoc (4)
hacking (459)
haiku (2)
horticulture (10)
house (23)
hsa (6)
humour (7)
imagez (28)
java (231)
java ee (3)
javafx (49)
jjmpeg (81)
junk (3)
kobo (15)
libeze (7)
linux (5)
mediaz (27)
ml (15)
nativez (10)
opencl (120)
os (17)
panamaz (5)
parallella (97)
pdfz (8)
philosophy (26)
picfx (2)
players (1)
playerz (2)
politics (7)
ps3 (12)
puppybits (17)
rants (137)
readerz (8)
rez (1)
socles (36)
termz (3)
videoz (6)
vulkan (3)
wanki (3)
workshop (3)
zcl (4)
zedzone (26)
Wednesday, 09 January 2013, 05:50

More video player work

Mucked around with a few things in JJPlayer last night and this morning. Nothing on TV last night and I just wanted a couple of hours today.

The new buttons and styling.

There were a few annoying things along the way. The keyboard input was a bit of a pain to get working, I had to override Slider.requestFocus() so it wouldn't grab keyboard focus when used via the mouse (despite not being in the focus traversal), and I added a 'glass-pane' over the top of the window to grab all keyboard events. I had to remove all buttosn from the focus traversal group and only put the 'glass-pane' in it. I made the glass-pane mouse-transparent so the buttons still work.

Another strange thing was full-screen mode. Although JavaFX captures ESC to turn it off, the ESC key event still ends up coming through to my keyboard handler. i.e. I have to track the fullscreen state separately and quit only if it's pressed twice.

Next to fix is those a/v sync issues ...

Update Well instead I added a frame capture function. Hit print-screen and it captures the currently displayed frame (raw RGB) and opens a pannable/zoomable image viewer. From here the image can be saved to a file.

Although I haven't implemented it, one could imagine adding options to automatically annotate it in various ways - timestamp, filename, and so on.

Update 2: I subsequently discovered "accelerators", so i've changed the code to use those instead of the 'glass pane' approach - a ton of pointless anonymous inner Runnables, but it feels less like a hack.

        scene.getAccelerators().put(new KeyCombination(...), ...);

Update 3: I tried it on my laptop which is a bit dated and runs 32-bit fedora with a shitty Intel onboard GPU (i.e. worthless). It runs, but it's pretty inefficient - 2-4x higher load than mplayer on same source. Partly due to Java2D pipeline I guess but it's probably all the excess frame copying and memory usage. I tried to do some profiling on the workstation but didn't have much luck. Just seems to be spending most of it's time in Gtk_MainLoop, although the profiler doesn't seem to know how to sort properly either.

Tagged android, hacking, javafx, jjmpeg.
Preserving arbitrary Aspect Ratio in JavaFX | JJPlayer controls
Copyright (C) 2019 Michael Zucchi, All Rights Reserved. Powered by gcc & me!