Re: ac3 in/out

[Lee Revell <rlrevell@joe-job.com>]

On Tue, 2006-03-21 at 11:27 +0100, Johannes Berg wrote:
> Hi,
> 
> From what I've seen about ac3 in and also out, the support in alsa for
> that is more of a hack, and the data that is passed down the pcm
> interface actually contains the channel status bits for some drivers...
> Working on the new Apple stuff this isn't possible -- only some channel
> status bits can be set by the software, some are fixed. And they aren't
> interleaved in the stream, but set externally.
> 
> So the question is -- are there any plans to abstract some digital out
> API within alsa? Otherwise the userspace will need to handle all kinds
> of different devices differently since the data on the stream is
> essentially the same as the data the chipset needs.

I don't understand - ALSA fully supports AC3 passthrough and digital
audio.

What is the exact problem you are trying to solve?

Lee



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