latency.c: some feature requests

[Lee Revell <rlrevell@joe-job.com>]

While trying to use latency.c to test my full duplex device for the
emu10k1 driver I have found some problems with it.

The first thing that doesn't work is that latency.c sets the sample rate
to 22050Hz.  Both of my hw devices only support 48000Hz.  This is fixed
by not setting the sample rate at all, causing it to default to the
correct rate.

I also need the capture device interleaved and the playback device
noninterleaved.  latency.c does not support this at all, it just assumes
that all hardware supports interleaved format.

I thought about adding command line options but it should just do the
right thing by default because my hw devices only support one sample
rate and one access type.

Anyway since the alsa documentation constantly refers to this file,
sometimes in lieu of any other documentation, it really needs to be more
flexible.

-- 
Lee Revell <rlrevell@joe-job.com>



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