[alsa-devel] About 'SNDRV_PCM_CLASS_MULTI' for devices with multi-channels
tiwai at suse.de
Thu Feb 20 09:02:18 CET 2014
At Thu, 20 Feb 2014 11:28:48 +0900,
Takashi Sakamoto wrote:
> Hi David,
> (My message was not delivered by ALSA's mailman...)
Because you posted from an address that isn't subscribed.
It takes time until manually approved.
> Again all,
> >> I have two questions about the usage of this macro.
> >> Should I use this macro for new drivers which I'm working for?'
> >> My drivers support some firewire devices, which is desinged for
> >> studio-use and have many channels. Its combination of channels are not
> >> designed for surround sound like 5.1ch.
> >> Just judging from its name, 'SNDRV_PCM_CLASS_MULTI', I should use this.
> >> But there are no drivers which use this macro in current tree, against
> >> my expectation that some drivers (ICE1712-pro, RME9652, 6fire usb and so
> >> on) should use this macro.
> >> Are there any reasons?
> In current tree, there are no drivers which uses this macro.
> As long as I investigated in ftp server, this macro is firstly added in
> ALSA 0.9.0beta1 (2001/02/21). So this macro has been ignored over 10
Right. And the likely reason is that such a differentiation doesn't
help much. You can still use your device for driving 5.1 surround :)
So, I rather would like to keep them RIP. Maybe worth to remove it
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