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Date: Tue, 7 Feb 2012 18:25:01 +0400
From: Ruslan Bukin <br@bsdpad.com>
To: Alexander Motin <mav@FreeBSD.org>
Message-ID: <20120207142501.GA92130@jail.io>
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Cc: freebsd-multimedia@FreeBSD.org
Subject: Re: [RFT]: RME HDSPe AIO sound driver
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On Tue, Feb 07, 2012 at 11:35:23AM +0200, Alexander Motin wrote:
> Hi.
> 
> First of all, thank you!
> 
> On 02/07/12 11:09, Ruslan Bukin wrote:
> >This is driver for RME HDSPe AIO (PCIe - series),
> >professional-grade ($800) sound card.
> >
> >Many things not implemented (like MIDI in/out,
> >TCO, WCM and other expansion boards).
> >
> >So only analog and digital in/out are available.
> >
> >Driver registers 8 out and 7 in stereo channels,
> >each represented as separate device, ie:
> >/dev/dsp%d.p%d
> >/dev/dsp%d.r%d
> 
> I think you are misinterpreting concept of channels used in
> pcm_addchan() function. These channels supposed to provide multiple
> equal playback/record streams -- hardware equivalent of vchans. If
> in your case it is different connectors and you want them to be
> independent -- you should create different PCM/dsp devices for them,
> like emu10kx or hda drivers do.
> 
> >Card frequency is in range (32..192) KHz
> >and period size (32..4096) samples.
> >
> >Period size is exported to dev.pcm.%d.period
> >sysctl.
> 
> Why are you duplicating here the latency control code already
> implemented in sound(4)? You should just follow buffer/block size
> given to you by the sound(4) via hdspechan_setblocksize() and then
> you can control latency in common way via hw.snd.latency_profile and
> hw.snd.latency.
> 

thanks, Alexander. I got it :)
give me a few days.

> >Tested on latest HEAD only.
> >
> >patch here:
> >http://bsdpad.com/hdspe/
> 
> -- 
> Alexander Motin