[alsa-devel] [PATCH 1/5] ALSA: usbaudio: parse USB descriptors with structs

Daniel Mack daniel at caiaq.de
Tue Feb 23 09:10:32 CET 2010


On Tue, Feb 23, 2010 at 08:57:32AM +0100, Takashi Iwai wrote:
> At Tue, 23 Feb 2010 08:50:29 +0100,
> Clemens Ladisch wrote:
> > 
> > Daniel Mack wrote:
> > > In preparation of support for v2.0 audio class, use the structs from
> > > linux/usb/audio.h and add some new ones to describe the fields that are
> > > actually parsed by the descriptor decoders.
> > > ...
> > > --- a/include/linux/usb/audio.h
> > > +++ b/include/linux/usb/audio.h
> > > @@ -81,7 +81,7 @@
> > >  
> > >  /* Terminal Control Selectors */
> > >  /* 4.3.2  Class-Specific AC Interface Descriptor */
> > > -struct uac_ac_header_descriptor {
> > > +struct uac_ac_header_descriptor_v1 {
> > 
> > This header is already used by drivers in drivers/usb/gadget/.
> > 
> > If there isn't too much overlap between v1 and v2 descriptors, it might
> > make sense to put them in separate headers (audio2.h) and to put the
> > parsers for v1 and v2 into separate files, too.
> 
> Good point.  But this can be in another patch?

It does break compilation though, so I'll fix that up somehow before
merge.

Daniel


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