Do I not understand the setLoadingCallback?

[Lindon]

The setLoadingCallback seems to fire sometimes BEFORE all the loading has happened. I understood this to get called once all the loading has happened....

Here's the situation:

I have 16 samplers, all loading at the same time, they do so using a pretty simple callback in the text name of the sample map like this:

inline function onSampleNameControl(component, value)
{
	//Load the Sample..
	local pos = theSampleMapNames.indexOf(component);
	if(theSamplers[pos].getCurrentSampleMapId() != component.get("text"))
	{
		Console.print("..........................Loading Sampler " + pos + " - a sample map called..." + component.get("text"));

		theSamplers[pos].loadSampleMap(component.get("text"));
		Console.print("..........................progress for the loading is:" + (Engine.getPreloadProgress() * 100) + "%");
	}
};

So I think the above should write out the number of each sampler being loaded

I also have a setLoadingCallback like this :

CirclePanel.setLoadingCallback(function(isPreloading)
{
	if(!isPreloading)
	{
	        // so all the samplers should now be loaded.. 
	        Console.print("#### Preload has ended ######");
	        Console.print("progress for the loading is:" + (Engine.getPreloadProgress() * 100) + "%");
	        // every sampler should now be loaded....
	        
	        for(lseg = 0; lseg<segmentData.length;lseg++)
	        {
		        Console.print("For sampler " + lseg);
		        Console.print("     ----- the index is:" + segmentData[lseg].NoteInScale);
		        Console.print("     ----- the start is:" + segmentData[lseg].SampleStart);
		        Console.print("     ----- the   end is:" + segmentData[lseg].SampleEnd);   
	        }
	        
	        //sampleLoadTimer.startTimer(1000);
        //};
    }else{
	    Console.print("Starting to load something.....");
	};   
}

So once we reach the point where everyone is loaded I should see a nice list of Sampler details...BUT...

I'm getting this in the Console:

Interface: Starting to load something.....
Interface: ..........................Loading Sampler 0 - a sample map called...Catchy Ocean_All I wanna
Interface: ..........................progress for the loading is:91.66666666666666%
Interface: ..........................Loading Sampler 1 - a sample map called...Catchy Ocean_Badly
Interface: ..........................progress for the loading is:91.66666666666666%
Interface: ..........................Loading Sampler 2 - a sample map called...Catchy Ocean_close to me
Interface: ..........................progress for the loading is:91.66666666666666%
Interface: ..........................Loading Sampler 3 - a sample map called...Catchy Ocean_day dreamin
Interface: #### Preload has ended ######
Interface: progress for the loading is:0.0%
Interface: For sampler 0
Interface:      ----- the index is:0.0
Interface:      ----- the start is:0
Interface:      ----- the   end is:58218
Interface: For sampler 1
Interface:      ----- the index is:1.0
Interface:      ----- the start is:0
Interface:      ----- the   end is:132300
Interface: For sampler 2
Interface:      ----- the index is:0
Interface:      ----- the start is:0
Interface:      ----- the   end is:22050
Interface: For sampler 3
Interface:      ----- the index is:0.0
Interface:      ----- the start is:0
Interface:      ----- the   end is:132300
Interface: For sampler 4
Interface:      ----- the index is:1.0
Interface:      ----- the start is:0
Interface:      ----- the   end is:132300
Interface: For sampler 5
Interface:      ----- the index is:0.0
Interface:      ----- the start is:0
Interface:      ----- the   end is:132300
Interface: For sampler 6
Interface:      ----- the index is:0.0
Interface:      ----- the start is:0
Interface:      ----- the   end is:132300
Interface: For sampler 7
Interface: ..........................progress for the loading is:91.66666666666666%
Interface:      ----- the index is:0.0
Interface: ..........................Loading Sampler 4 - a sample map called...Catchy Ocean_hold you so tight
Interface:      ----- the start is:0
Interface: ..........................progress for the loading is:91.66666666666666%
Interface:      ----- the   end is:132300
Interface: ..........................Loading Sampler 5 - a sample map called...Catchy Ocean_houhou
Interface: For sampler 8
Interface: ..........................progress for the loading is:91.66666666666666%
Interface:      ----- the index is:0.0
Interface: ..........................Loading Sampler 6 - a sample map called...Catchy Ocean_I like the way I feel
Interface:      ----- the start is:0
Interface: ..........................progress for the loading is:91.66666666666666%
Interface:      ----- the   end is:132300
Interface: ..........................Loading Sampler 7 - a sample map called...Catchy Ocean_I want you so
Interface: For sampler 9
Interface: ..........................progress for the loading is:91.66666666666666%
Interface:      ----- the index is:0.0
Interface: ..........................Loading Sampler 8 - a sample map called...Catchy Ocean_just leavin
Interface:      ----- the start is:0
Interface: ..........................progress for the loading is:91.66666666666666%
Interface:      ----- the   end is:132300
Interface: ..........................Loading Sampler 9 - a sample map called...Catchy Ocean_Me Up
Interface: For sampler 10
Interface: ..........................progress for the loading is:91.66666666666666%
Interface:      ----- the index is:1.0
Interface: ..........................Loading Sampler 10 - a sample map called...Catchy Ocean_Out of time
Interface:      ----- the start is:0
Interface: ..........................progress for the loading is:91.66666666666666%
Interface:      ----- the   end is:132300

As you can see it loads the first 4 Samplers (0 to 3) just fine - but then the setLoadingCallback kicks in - when it clearly shouldn't as theres more Samplers to load

What am I doing wrong?

[d.healey]

@Lindon The loading callback triggers twice, when loading starts and when loading ends.

https://docs.hise.audio/scripting/scripting-api/scriptpanel/index.html#setloadingcallback

[Lindon]

@d-healey precisely - its kicking in When it starts and again BEFORE its ended...

[d.healey]

@Lindon I wonder if it retriggers for each sampler.

[Lindon]

@d-healey then how in heavens name do I find out when every Sampler has been loaded?

[d.healey]

@Lindon You could do a test, every time it says it's finished preloading you increment a variable, if the variables value == the number of samplers then all samplers are loaded. This test will also tell us if it does retrigger for every sampler or if there is an issue.

[Lindon]

@d-healey nope cant do that - the setLoadCallback only executes once!! - already worked that out...

[d.healey]

@Lindon Oh I just had a look through your Console output above. It could be what you're seeing is due to the loading callback running in an asynchronous background thread, so there is a lag between the values you're seeing and the actual state of the instrument.

[Lindon]

@d-healey yes precisely...so I need a callback that CORRECTLY tells me when the loading thread has actually finished - and I think that setLoadingCallback isnt doing that.

Perhaps it is telling me the truth - everything IS finished...but sadly when I assume this - and start setting the start and end positions for samples - it fails

[d.healey]

@Lindon I think it is correct, because it's asynchronous it will always be behind, never ahead, so if it says loading has finished then loading must have finished.

@Christoph-Hart Any insight?

[Lindon]

yes @Christoph-Hart any insights gratefully received.

[Lindon]

@Lindon hmmm... it seems that the setPostCallback gets executed after all of these - perhaps I could use that...

[Lindon]

@Lindon nope now this is executing BEFORE not after - wow nothing in here is consistent.

[clevername27]

@Lindon Were you able to make any progress here? I'm having the same issue - and without the callback, everything fails, because my scripts begin processing the sample map before it's loaded. :(

[Lindon]

@clevername27 said in Do I not understand the setLoadingCallback?:

@Lindon Were you able to make any progress here? I'm having the same issue - and without the callback, everything fails, because my scripts begin processing the sample map before it's loaded. :(

Well I think I got this to work - the product is out there - so I will try and take a look if I get time otherwise Christoph is you man here...

[clevername27]

@Lindon Thanks - likewise appreciated.

[aaronventure]

@clevername27 getPreloadProgress() repeats itself from 0 to 1 and it doesn't return a sample map name, that's getPreloadMessage().

Panel's getLoadingCallback will return 1 of its preloading. While it will return 0 with the preload not yet finished (but rather at 90-something percent), you can query whether the preload has finished with a timer and if (getPreloadMessage() == ""). Start the timer in the loading callback with if (isPreloading == true)

[clevername27]

@aaronventure Thank you!

[clevername27]

@aaronventure On second thought, I can't follow what you're saying here. Could you pls explain it to me like I'm 5?? :)

[aaronventure]

@clevername27 what have you tried so far?