Mark Kent wrote:
Terry Porter <linux-2@xxxxxxxxxxxxxxx> espoused:
High Plains Thumper wrote:
Apr. 28, 2008
An open source multimedia graphics framework for embedded
applications has emerged, along with a Linux-based media center
middleware stack. The "Disko" framework and "MorphineTV" stack
can be used to build graphical user interfaces for digital video
broadcast receivers and IPTV set-top boxes, according to project
(Click for larger view of Disko and MorphineTV running on TI
DaVinci based development hardware)
Both MorphineTV and Disko appear to have grown out of the
DirectFB project, which maintains the widely used minimalist
graphics layer of the same name. Commonplace in Linux devices
such as mobile phones, DirectFB provides a much smaller
alternative to the X Window system, while still supporting
graphics acceleration, translucent windows, layered displays, and
input device abstraction.
About 7 years ago I was approached by a local community station who were
playing tv shows via a VHS tape recorder, directly into their tv
transmitter on top of a remote hill.
When the tape finished, that was it, someone had to drive from their base in
town to replace the tape, a 16Km trip.
They wanted to know if I could improve the process and I said I could and
would do the following:
1) set up a WiFi test link from their studio in town to the tv transmitter
to see if it was feasible.
2) build a Linux box that would play mpegs etc, directly into the TV
composite vide input, but they would have to supply a PC.
1) was completed, and I demoed that wifi worked fine from the roof of their
building to the tv transmitter, a length of about 3.5Km line of sight.
2) They supplied a 200Mhz P3 PC with not much ram!
Obviously this could not handle X and play video etc, so I found a vga video
card with composite video out, and set up Mplayer to play thru the
composite video out using the framebuffer driver. The result was excellent,
and perfect for their needs.
This was in 2002, and the fb driver worked a treat then :)
The framebuffer approach is very lightweight, great for using on
stand-alone machines, particularly if one needs to get the video out
onto something else via a direct video connection.
I recall that there is a framebuffer X-server?
"It is impossible to defeat an ignorant man in argument."
William G. McAdoo.
American Government official (1863-1941).