Loris processCustom with Lambda arguments?

[A Former User]

Pretty sure I've asked something like this before but I can't find the thread, is there a way to pass arguments to the processCustom lambda function?

inline function myCoolFunction(obj, f)
{
	obj.frequency = f;		
}

lorisManager.processCustom(audio, myCoolFunction(440.0)); // ?

Inline function call myCoolFunction: parameter amount mismatch: 1 (Expected: 2)

[Dan Korneff]

@iamlamprey said in Loris processCustom with Lambda arguments?:

myCoolFunction(440.0)

I'm not sure about Loris, but the source of the error is because your function is expecting 2 parameters (obj, f) and you're only sending one (440.0)

[ospfeigrp]

@iamlamprey said in Loris processCustom with Lambda arguments?:

lorisManager.processCustom(audio, myCoolFunction(440.0)); // ?

lorisManager.processCustom(audio, myCoolFunction(obj, 440.0)); // ?

Example

Content.makeFrontInterface(600, 600);
var obj = {"frequency": 0};
inline function myCoolFunction(obj, f)
{
	obj.frequency = f;
	Console.print(trace(obj));	
}
myCoolFunction(obj,440.0); // ?

[A Former User]

Yeah that works for regular functions but Loris is a bit different:

// works
function myCoolFunction(obj)
{
	// even Console.print(obj.frequency) here crashes HISE
	obj.frequency = 440.0; // works 
}

// doesn't work
function myLessCoolFunction(obj, f)
{
	obj.frequency = f;
}

// obj is already defined by a separate Loris process:
lorisManager.analyse(file, f0);	// this is our obj, we don't need to declare it or pass it to the function

// works
lorisManager.processCustom(file, myCoolFunction); // no parameters, just the function name

// breaks
lorisManager.processCustom(file, myLessCoolFunction(obj, 440.0));

// standard lambdas also break
lorisManager.processCustom(file, function [obj, 440.0](myLessCoolFunction)); // "can't capture anonymous expression"

It's not a huge deal, I can just make a few variants of the function ¯_(ツ)_/¯

[A Former User]

@iamlamprey Okay a simple workaround is to just call another inline function inside the Loris one:

inline function adjustHarmonicGain(partial, freq, target, tolerance, multiplier)
{
	// Adjusts the gains of any partials that lie within the tolerance of a target frequency	
	local spectralDistance = freq > target ? freq - target : target - freq;
	if (spectralDistance < tolerance)
		partial.gain *= multiplier;
}	

inline function myCoolFunction(obj)
{
	adjustHarmonicGain(obj, obj.frequency, 440.0, 50.0, 0.0); // works
}

lorisManager.processCustom(file, myCoolFunction);

[Christoph Hart]

@iamlamprey yes, loris calls into the function with a single argument containing the data object, so if you supply more arguments it will be ignored.

The lambda way would also work, but you cannot pass literal values (in this case the 440.0), but it needs to be a locally scoped variable.

Another option would be to use a variable outside of the function that you set to 440.0.