[alsa-devel] [RFC][PATCH 00/15 v4] OXFW driver, a succesor to firewire-speakers

[Clemens Ladisch]

Takashi Sakamoto wrote:
> I have an issue for Griffin Firewave.
>
> This device can handle AV/C Stream Format Information command and
> driver can get to know stream formations via the command.
>
> According to these responses, supported formations are:
> Input Stream to device:
> 	Rate	PCM	MIDI
> 	32000	6	0
> 	44100	6	0
> 	48000	6	0
> 	96000	6	0
> 	32000	2	0
> 	44100	2	0
> 	48000	2	0
>
> But current 'firewire-speakers' has PCM constraints below:
>  - 6ch at 32/44.1/48/96 kHz
>  - 2ch at 48/96 kHz
> http://mailman.alsa-project.org/pipermail/alsa-devel/2014-February/073562.html
>
> So this OXFW driver may lost a support for 2ch/96.0kHz for FireWave
> and gain 2ch/32.0kHz and 2ch/44.1kHz.
>
> I don't know exactly the reason of these gaps.

The old driver configured nothing but the rate.  Is there any mechanism
to set the stream format?


Regards,
Clemens