16 Sep
2012
16 Sep
'12
6:10 p.m.
On Sun, Sep 16, 2012 at 12:46:42AM -0700, Henner Zeller wrote:
Over the week or so, I've build some fuse
filesystem filters flac files
on-the-fly
using the zita convolver. This makes it real easy to play
around with files and filters. In particular with systems that otherwise
don't support stream convolving, but just can read files.
Interesting project...
One thing: when skipping forward (or seeking in general)
there's no need to convolve all data up to that point.
If P is the new position and L is the lenght of the IR,
then just call Convproc->reset(), seek the input file to
P - L (or 0 if P < L), and convolve up to P. You're
computing a FIR filter, so no more history is required.
If the seek involves an output discontinuity for the user,
you could even just call Conproc->reset(), seek to P, and
proceed normally. The result will be as if there was only
silence before P.
Ciao,
--
FA
A world of exhaustive, reliable metadata would be an utopia.
It's also a pipe-dream, founded on self-delusion, nerd hubris
and hysterically inflated market opportunities. (Cory Doctorow)