Dear Freevo's friends, attached you can find a funny piece of Python code developed by me for Freevo; trying to pay off a small part of my debt with Freevo. Indeed, my children kill me if our PC-Home had not got Freevo ;-)
For impatients, type "python dvb3l.py". For reckless guys, unpack the tarball
and activate the plugin in your local_conf.py: plugin.activate('dvb.dvb3l')
dvb3l.py allows access to the DVB v3 kernel device driver for Linux: the
present DVB API for Linux (although S2API is coming ... see linuxtv.org).
Supossedly, Windows' guys could rewrite it for analogous operation. The list
DVB_HW defines entries to be sequentially tuned during a specified time
(DVB_DWELL_TIME).
Special entries in the list DVB_HW trigger the scanner capability. Any entry
without the frequency field (for instance: [0,0,0]) provokes a scanner looks
for valid DVB frequencies which become as they would be manually written in the
list DVB_HW. A scanner entry tries to tune at frequencies according to
DVB_SCANNER_RES_FREQ resolution.
The real work for DVB demux is carry out by dvb_ts.py, which works at the
lowest level: DVB packets. Code is compliant with two normative levels: H222.0
(as knwown as ISO.13818-1) and DVB (see ETSI docs). Present code is focused on
data available within the DVB stream, known as PSI or SI; the most significant
and known data is the real-time EPG of all DVB channels. Therefore, this
middleware piece of code could be used to extract continuously EPG data. Other
future developments could be based on it: ATSC for American guys, interactive
TV (MPH, TV Any-Time), ... even to grab directly video, audio or other stream
data (subtitles, ...)
Although I have long-term background for several programming languages, this is
my first Python experience; besides, code has been written from scratch. This
means heavy testing would be advisable, though I have tested it during days
after releasing this first alpha.
A good improvement would be to add cache support for data gathered by the
scanner and demuxer. A pending integration task is a method to allow to live
with other resources (mplayer, xine, ... or Freevo code) tunning the DVB card.
Friends, ... try it out, enjoy and consider to incorporate this code into
Freevo. I will try to continue supporting this contribution within my personal
limitations.
Regards, JP
dvb_test_package.tar.gz
Description: Unix tar archive
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