remixing-use-all-sink-channels

[david@xxxxxxxxxxxxxx (david@xxxxxxxxxxxxxx)]

Hi,

I added a remixing-use-all-sink-channels option based on the
discussions in https://bugs.freedesktop.org/show_bug.cgi?id=62588 and
https://bugs.freedesktop.org/show_bug.cgi?id=94563. Let me know what
you think.

One question: In src/pulsecore/resampler.c, I assumed that
r->o_ss.channels <= PA_CHANNELS_MAX. Is my assumption correct? Should
that be pa_assert()ed?