[alsa-devel] [PATCH 4/4 v4] ALSA: usb-audio: Scarlett mixer interface for 6i6, 18i6, 18i8 and 18i20

[Chris J Arges]

On Tue, Nov 04, 2014 at 02:29:02PM +0100, Tobias Hoffmann wrote:
> On 04/11/14 14:16, Tobias Hoffmann wrote:
> >But maybe (as Clemens suggested) the strings *for .opt_master and
> >.opt_matrix* should just be created dynamically in
> >scarlett_ctl_enum_info, instead of using snd_ctl_enum_info.
> >I want to point out that scarlett_device_info already contains the
> >necessary information to do this:
> >
> >    .matrix_out = 6,
> >...
> >    .pcm_start = 0,  // pcm(1) .. pcm(analog_start-pcm_start)=pcm(12)
> >    .analog_start = 12, // analog(1) .. analog(4)
> >    .spdif_start = 16, // spdif(1) .. spdif(2)
> >    .adat_start = 18,  // adat(1) .. adat(0)  [i.e. no adat]
> >    .mix_start = 18, // mix('A') .. mix('F')=mix('A' + matrix_out)
> >
> >
> >
> >and Off(-1). Only elem->private_data has to be of type
> >scarlett_mixer_elem_enum_info for the usual enums (impedance, pad,
> >...), but of type scarlett_device_info for the master and mixer
> >enums...
> >
> 
> Hmm, as the same options are required for a lot of master and mixer
> enums, the strings should probably be generated only once (and a
> dynamic scarlett_mixer_elem_enum_info would require no modifications
> of scarlett_ctl_enum_info).
> 
>   Tobias

Yes this would be the plan dynamially generate them once and reuse them. I'll work on implementing this.
--chris