Audio output 3 status & call for contributors
massiot at via.ecp.fr
Mon Aug 12 00:51:34 CEST 2002
At 15:02 +0200 10/08/2002, Jean-Paul Saman wrote :
>Starting on libmad ... do the downscaling functions need to move to
>"fixed32 resampler" or another audio filter ?
Yes you will need to write two converters. The mad codec should
request buffers of type AOUT_FMT_FIXED32 (vlc_fixed_t is defined to
be strictly identical to mad_fixed_t), and copy raw samples from
Then two things may happen : either the host has a FPU, and the aout
core will spawn a float32 mixer, and in that case will look for a
fixed32tofloat32 converter module.
Or the host has no FPU, and the aout core will spawn a fixed32 mixer.
The trivial mixer can also mix fixed32 samples, so that won't be a
problem. However, the output plug-in will require a fixed32tos16
module on most architectures (ie. all except Mac OS X).
You can also provide different converters with different
precision/efficiency, but currently there is no way to choose one at
This is the vlc-devel mailing-list, see http://www.videolan.org/vlc/
To unsubscribe, please read http://www.videolan.org/lists.html
If you are in trouble, please contact <postmaster at videolan.org>
More information about the vlc-devel