[CM] pipewire Snd and SndLib

[Kjetil Matheussen]

Hi Juan,

The jack code for libsnd was written before jack MIDI existed, so I
didn't think about checking for the correct type.
That's why you see an error message about it trying to connect an
audio port to a MIDI port.

This patch should fix it:
http://users.notam02.no/~kjetism/audio.c.diff

(Bill, please apply the patch, I've tested it)





On Sun, Oct 3, 2021 at 7:27 PM Juan I Reyes <juanig at ccrma.stanford.edu> wrote:
>
>
> Hi Bill
>
> Maybe I should address this issue to Nando also.
>
> Been trying 'pipewire' on Fedora34 last weeks and seems useful.
>
> Performance seems good and in fact makes one use Jack clients all the
> time.
>
> However, I've been getting warning complaints when I start Snd with Jack
> or when I use 'sndplay' on the command line:
>
> --------------
>
> [] /zap> sndplay new.snd
> Warning. Cannot connect jack output port 4: "Midi-Bridge:Midi
> Through:(playback_0) Midi Through Port-0".
> Warning. Cannot connect jack input port 2: "Midi-Bridge:Midi
> Through:(capture_0) Midi Through Port-0".
> [] /zap>
>
> --------------
>
> After some digging, for some reason either PipeWire or ALSA seem to lock
>   'Midi Through Port-0' and Jack is not able to make any connections.
> Have read PipeWire documentation and there is little about MIDI Ports.
>
> Further, I don't know why Snd and 'sndplay" for that matter, want to use
> MIDI since both are audio applications and only Jack audio connections
> would be expected. BTW, audio connections work seamlessly. Old Qjackctl
> patch-bay configurations still work under pipewire.
>
> Tried to compile my own version of 'Sndlib' with jack features but when
> I try to make 'sndplay' complains about a missing 'alsa' library
> 'libsndlib.a' although 'libsndlib.so' is compiled.
>
>
> Use 'sndplay' all the time not only because you can open almost any type
> of soundfile headers but because you can play eight or sixteen channels
> of interleaved audio soundfiles just on the command line.  Very useful
> when you're rendering audio and testing code.
>
>
>    Cheers,
>
>
>    -- * Juan Reyes
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