Re: [Jack-Devel] Rust Bindings

On Sat, Jun 22, 2013 at 12:21 PM, paul santa clara <[hidden]>wrote:

> Hi everyone,
>     I've been playing around with writing Rust bindings to Jack recently
> despite limited experience with the API.  For the most part everything has
> gone very smoothly but I do have some high level questions regarding normal
> operation.
>
> 1)I have noticed that if create a jack_ringbuffer of say size 4096 and
> then immediately query the initial write space available with
> jack_ringbuffer_write_space, I get 4095 back. Is there some kind of
> preferences for odd numbers here?
>

the design of the jack ringbuffer is such that a full buffer has zero space
and an empty buffer has SIZE-1 space.


>
> 2)Another interested behaviour I have observed is that Jack will 'mute' my
> client if I attempt to push very large floats into my port buffer from
> within my callback.  Is this expected behaviour?  Are there any other
> conditions that might trigger it?  And is there some kind of callback which
> I can use to subscribe to messages from the Jack Server letting me know
> when such an event has occurred?
>

audio delivered to h/w JACK ports should be in the range -1.0 .. +1.0 ...
behaviour outside that range with h/w ports is undefined (and actually this
is true of s/w ports also).

--p

1371920628.14147_0.ltw:2, <CAFa_cKm7pm66xt64Qs+YXOHHwViMmmKtoMZf+Cvq=+r3N2pD-A at mail dot gmail dot com>