Re: usbus428 0.0.7 patch against release alsa-driver 0.9.6 (was Re: tascam gives a go for us428 @ alsa ...)

[Takashi Iwai <tiwai@suse.de>]

Hi Karsten,

At Wed, 30 Jul 2003 21:33:37 +0200,
Karsten Wiese wrote:
> 
> [1  <text/plain; iso-8859-1 (7bit)>]
> Am Montag 05 Mai 2003 15:14 schrieb Takashi Iwai:
> > Hi,
> >
> > At Wed, 30 Apr 2003 13:56:34 +0200,
> >
> > karsten wrote:
> > > ... if I understand this
> > > http://www.tascam.com/forums/showthread.php?s=&threadid=28584
> > > correctly.
> > > please have a look at administrator Jims post near the bottom and tell
> > > me, if you agree to include our us428 driver in alsa.
> > > we would split the driver in two parts then, audio/midi handling and
> > > firmware.
> >
> > great!
> >
> > could you send the patch again (the one to the latest cvs version is
> > preferred)?  the current ALSA usb-audio driver has more generic layer
> > to absorb the device specific part, so perhaps we can integrate the
> > tascam driver more smoothly.
> >
> >
> > thanks,
> >
> > Takashi
> 
> this is part 1 of usbus428 0.0.7 patch against release alsa-driver 0.9.6.
> i hope 0.9.6 is still pretty close to CVS.

thanks!


> this works for me on a planet ccrma rh9 box with 2.4.21-ck3 kernel.
> so far only on a laptop with bx440 chipset. my via pIII box has shown 
> usb-problems and crackling sound with this. (anybody any ideas?)
> 
> new here is:
> - both firmware-downloads are handled now by the snd-usb-us428-dl module (this 
> functionality should move further on into userspace via libusb ? volunteers?)

yes, definitely it's the right way to go.

> - pcm capturing using one device with all 4 channels works -> good for jack
> - beginning of an userspace application interface for controll communication. 
> (there is a very early implementation that can start & stop ardour using 
> those knobs; erm actually not in this patch..still needs some polishing..)
> 
> my working configure invocation was:
> "./configure 
> --with-cards=via82xx,msnd-pinnacle,usb-audio,usb-us428,usb-us428-dl,es1968 
> --with-kernel=/home/ka/kernel/linux-2.4.21 --with-debug=full"
> 
> and it will most propably not run on one of the other tascam usb devices.
> and yes, the midi i/o should also still tick by virtue of snd-usb-audio :-) 
> 
> i agree that its a reasonable goal to integrate the us428 audio part into ALSA 
> usb-audio. is there such a mechanism to syncronize the playback-pipe by the 
> capture-pipe allrteady in usb-audio.c? the us428 definitly needs such a 
> beast.

i'm not sure what you mean here, but i guess it's not implemented.
(is it a standard USB audio feature? if not, we don't have it :)

> for now its easier for me to keep a seperate module: source is smaller and i'd 
> like to do more on the knobs, sliders & lights part of the us428.
> 
> none the less i'd greatly appreciate if you'd submit the path ;-) 

i'll check the code and try to merge to cvs.
as a start-up, i'll put all of them.  later on, we can reduce and
integrate the common parts and remove the firmware stuff to
user-space.

so, please be patient for a while.  it will be finished likely in the
beginning of the next week.  i've been quite busy for these days...


ciao,

Takashi


-------------------------------------------------------
This SF.Net email sponsored by: Free pre-built ASP.NET sites including
Data Reports, E-commerce, Portals, and Forums are available now.
Download today and enter to win an XBOX or Visual Studio .NET.
http://aspnet.click-url.com/go/psa00100003ave/direct;at.aspnet_072303_01/01