Hi Yoann,2013/8/14 Yoann QUERET <[email protected]>
>
> Hi,
>
> I would like to enable/disable normalize or limit without restart
> process and stream.
>
> My simple test script is :
>
> source = input.alsa( device = "hw:0,0" )
> source = normalize( id="normalize", ...., source)
> source = limit( ...., source)
> output.icecast( id="stream", ...., source)
>
> I can enable or disable stream using telnet or socket (stream.stop or
> stream.start) and i have no idea to make the same via telnet or socket
> for normalize or limit.
>
> Any idea ?
If you look at the parameters for the normalize operator:
* gain_max : anything that is either float or ()->float (default: 6.)
Maximal gain value (dB).
* gain_min : anything that is either float or ()->float (default: -6.)
Minimal gain value (dB).
* k_down : anything that is either float or ()->float (default: 0.1)
Coefficient when the power must go down (between 0 and 1, slowest to
fastest).
* k_up : anything that is either float or ()->float (default: 0.005)
Coefficient when the power must go up (between 0 and 1, slowest to
fastest).
* target : anything that is either float or ()->float (default: -13.)
Desired RMS (dB).
* threshold : anything that is either float or ()->float (default: -40.)
Minimal RMS for activaing gain control (dB).
You will notice that these values are types as "float or ()->float". This
means that you can use either a fixed value or a callback for them. For
instance:
# Callback returning gain_max
def gain_max() =
# .. compute/fetch value
8. # Example return value
end
This way, you should be able to use any value you want at any time.
Hope this helps,
Romain
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