[mythtv] Digital audio passthrough
Jean-Yves Avenard
jyavenard at gmail.com
Tue Sep 14 08:51:29 UTC 2010
Hi
On 14 September 2010 18:10, <mythtv at meric.id.au> wrote:
>
> Hmmm.. well, in my case it didn't work.
yeah, but it's *your* case, e.g. you're the only one so far :)
>
> The funny thing is that the device open doesn't actually clear the
> non-audio flag. It isn't until you set the hw_params (and prepare the
> device), that it gets wiped out.
>
> Jean-Yves, if you happen to be making changes at some point in the
> future, I think that the snd_pcm_prepare() call in SetParameters() can
> be removed. My understanding is that the snd_pcm_sw_params() call does
> this implicitly.
>
> Just out of curiosity - I understand what the AES0 flags do, but what do
> the rest actually mean? My setup seems to work without them.
The defaults are:
@args.AES0 {
type integer
# consumer, not-copyright, emphasis-none, mode=0
default 0x04
}
@args.AES1 {
type integer
# original, PCM coder
default 0x82
}
@args.AES2 {
type integer
# source and channel
default 0x00
}
@args.AES3 {
type integer
# fs=48000Hz, clock accuracy=1000ppm
default 0x02
}
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