[vorbis] Auto Vorbis
support at fmod.org
Thu Oct 11 01:17:14 PDT 2001
Im quite interested in this too for pocketpc.
Someone on vorbisdev (are you on that list?) posted the following..
I'm currently working on converting libvorbis to fixed point arithmetic.
I've managed to get all the decoding after the MDCT reverse
into 24-bit fixed point, including the windowing.
Russell King (rmk at arm.linux.org.uk) The developer of ARM
> -----Original Message-----
> From: owner-vorbis at xiph.org [mailto:owner-vorbis at xiph.org] On Behalf
> Sent: Thursday, 11 October 2001 8:10 AM
> To: vorbis at xiph.org
> Subject: [vorbis] Auto Vorbis
> Is anybody going to do something about the fact that vorbis decoder
> on ARM processors (iPaq's, etc) or any (that I know of) car music
> How can vorbis expect to compete when one of the most popular uses of
> in the car?? Though I would love to switch to vorbis, I am forced to
> with MP3 because of this.
> I emailed a previous poster here who appeared to be working on a port
> but his response was:
> "Unfortunately work has halted. It doesn't look like it will ever be
> enough with floating point emulation. This puts the effort required to
> much higher than the time I can affort to give to it.
> Still if any thing does happen I will be sure to let you know.
> SO, I tried the brain behind the open source MP3 player at
> www.pjrc.com/tech/mp3/ , to see about the possibility of adding vorbis
> to the project, but he had this to say:
> "I just looked at the xiph.org pages, and there's no mention of a
> decoder. All of the important parts... in fact everything except the
> libvorbisfile library, is labeled as "Beta release". Those libraries
> claim to have stable APIs, and it looks like the bitstream format is
> now stable... but the encoder doesn't make use of several features of
> the bitstream, so there's no real way to test a 3rd party (or even the
> official 1.0rc2) vorbis implementation for correct operation with
> future vorbis streams.
> Worse yet, it appears that everything is based on floating point
> so either a floating point DSP chip or considerable work to translate
> the algorithms to integer-only would be needed."
> Alas, it seems vorbis falls short of what I need.
> josh at alumni.southern.edu
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