Hi Everybody:
Below is this week's Ogg Traffic in plain text. The HTML version is
available at
http://www.vorbis.com/ot/20030331.html
Enjoy!
Ogg Traffic for Monday, March 31, 2003
[1]Carsten "Purple" Haese
March 31, 2003
_________________________________________________________________
Table of Contents
1. Status Updates
1.1. Monty
1.2. Michael Smith
1.3. Brendan Cully
1.4. Karl Heyes
1.5. Jean-Marc Valin
2. Recent Developments
2.1. Tremor Improvements
2.2. Nero Ogg Vorbis plugin
2.3. New Software
2.4. New (Experimental) Bitrate Peeler Available
[2]Previous Issues of Ogg Traffic
1. Status Updates
1.1. Monty
In a flurry of CVS activity, Monty has completed the tedious
libogg2-zerocopy rewrite of the memory management for the Ogg framing
layer. He then proceeded to deploy the new memory management in
Tremor, along with the recent vorbisfile fixes and optimizations. Read
more about this below.
1.2. Michael Smith
Mike was busy as always and added 24 bit input support to oggenc,
fixed ices build problems, addressed various icecast bugs, and added
two new admin commands to icecast for killing clients by id and for
killing sources.
Mike is also consistently one of the most active team members on the
mailing list, helping users with various Icecast and Vorbis related
problems. Thanks, Mike!
1.3. Brendan Cully
Brendan committed more ices code cleanups and took a first stab at
making YP support in icecast optional. Since YP support depends on
libcurl, this would allow people that don't have libcurl and don't
need YP support to still build icecast.
1.4. Karl Heyes
Karl committed various cleanups, autotools tweaks and build fixes to
ices and libshout.
1.5. Jean-Marc Valin
Since [3]Speex 1.0 was released just last week, there was no CVS
activity for Speex, but Jean-Marc already has plans for future
developments. He has been seen on the IRC channel thinking out loud
about possibilities for integer-only implementations of the Speex
encoder and decoder.
2. Recent Developments
2.1. Tremor Improvements
As mentioned above, Monty has completed the libogg2-zerocopy redesign
of the Ogg memory management code. In a nutshell, this new memory
management cuts buffering of stream data to an absolute minimum and
eliminates lots of memory copies between framing layers. This ought to
be useful for applications with high data rates (e.g. [4]Video), and
it might give a performance boost on embedded platforms with slow
memory. Because of its usefulness in embedded applications, the
libogg2 memory management has been merged into Tremor, the
integer-only Vorbis decoder library.
Along with this, Monty has merged his recent vorbisfile fixes and
seeking optimizations into Tremor. As he states [5]in this message,
the changes have passed basic unit testing, but unit testing can't
replace real-world testing by lots of people. If you'd like to help,
please grab the latest copy of Tremor and bang on it!
2.2. Nero Ogg Vorbis plugin
Various versions of this plugin have been floating around the Net for
a while (the first version was sighted mere days after Nero's SDK
became available), but now it seems to have found a sufficiently
stable home. The Ogg Vorbis plugin for Nero can be downloaded [6]from
this page, along with plugins for FLAC and other codecs.
2.3. New Software
A new title has been added to the [7]Software section at
[8]vorbis.com. The new addition is [9]CAJUN, which is a project that
allows you to turn an old PC into a car or home jukebox. Written in
Perl, CAJUN supports keypads, infra-red remote controls, LCD/VFD
displays, FM cards, CD players, Ogg Vorbis, Shoutcast/Icecast streams,
GPS devices, and other goodies.
2.4. New (Experimental) Bitrate Peeler Available
Just when I wanted to submit this Ogg Traffic, Segher informed me that
he has finished a new experimental bitrate peeler. (A bitrate peeler
is a tool that reduces a Vorbis file to a smaller bitrate without
decoding and reencoding.)
You can read his announcement and download the code [10]here. Please
note that the code is experimental. Give it a whirl and let Segher
know if you have any problems.
References
1. mailto:carsten@xiph.org
2. http://www.vorbis.com/ot/
3. http://www.speex.org/
4. http://www.theora.org/
5. http://www.xiph.org/archives/tremor/200303/0017.html
6. http://neroplugins.cd-rw.org/
7. http://www.vorbis.com/softwarenews.psp
8. http://www.vorbis.com/
9. http://www.cajun.nu/
10. http://www.xiph.org/archives/vorbis-dev/200303/0085.html
--- >8 ----
List archives: http://www.xiph.org/archives/
Ogg project homepage: http://www.xiph.org/ogg/
To unsubscribe from this list, send a message to
'vorbis-request@xiph.org'
containing only the word 'unsubscribe' in the body. No subject is
needed.
Unsubscribe messages sent to the list will be ignored/filtered.
