indentation
indentation
cleanup on error

using a goto statement
base mmap-filename on device-name

same as in pcm_iemladspa
flags to detect whether the plugin has both playback and capture
run processing for plugins that are only CAPTUREing
trying to allow mono-capture/playback

this doesn't really work yet:
the client gets announced a single channel, but we don't perform mono/stero conversion!
DEBUG is now a printf replacement
no CRLF in debug-position output
hopefully got MONO-support working
(re)enable processing
REinterleave after ladspa-processing

rather than DEinterleave (typo!)
allow disabling of DEBUG and use it
split bufferoffset variable into sub-variables
MUTE function to mute de-interleaved channels
mute unused channels

so we don't accidentally send garbage to the ladspa plugin