How do I load a midi script programmatically?

Orvillain

This is what the docs says:

So far as I can tell, I am doing this. But the script is not being loaded into the midi processor.

Here is my midi_processor.js file:

var test_var = "test";

function onNoteOn()
{
	
}
 function onNoteOff()
{
	
}
 function onController()
{
	
}
 function onTimer()
{
	
}
 function onControl(number, value)
{
	
}

And here is my builder instruction:

	local midi_processor = builder.create(
						builder.MidiProcessors.ScriptProcessor,
						sampler_name + "_midi_proc",
						slot_data['module_index'],
						builder.ChainIndexes.Midi);
	
	builder.connectToScript(midi_processor, "{PROJECT_FOLDER}/Scripts/ScriptProcessors/midi_processor.js");

Here's a screenshot showing that the file is in the right path:

Don't know if I am misunderstanding something, haven't debugged something properly, or if I'm making a mistake. But so far as I can tell, the builder is definitely alive because everything else gets correctly setup. The only thing I can think is, there's something wrong with the path.

rglides

I'm not sure I'm fully understanding, but this loads an empty MIDI in the player, is that what you want? This uses a button but you can easily just write it to work however

const var MIDIPlayerSine = Synth.getMidiPlayer("MIDI Player Sine");


const var midiCreate = Content.getComponent("midiCreate");
inline function onmidiCreateControl(component, value)
{
if (value)
    {
        MIDIPlayerSine.clearAllSequences();        
        MIDIPlayerSine.create(4, 4, 8);
       } 

};

Content.getComponent("midiCreate").setControlCallback(onmidiCreateControl);

Orvillain

@rglides I don't think that is relevant really. I'm wanting to load a file on disk into a midi script processor. I'm not looking to clear a midi player. Thanks though!

rglides

@Orvillain I thought the issue was needing to load an empty (or predefined) file into the midi player via script rather than having to do it manually, sorry I totally misunderstood

d.healey

The reference path doesn't need to include "/scripts/" as {PROJECT_FOLDER} will automatically go to the scripts folder.

Does midi_processor contain an index?

Orvillain

@d-healey I bet you that's what it is! I bet it is looking inside:
PROJECT_FOLDER/Scripts/Scripts/ScriptProcessors/midi_processor.js

If the project folder flag automatically includes the scripts sub folder.

I will check and get back to you. Yes, midi_processor does have an index assigned to it.

d.healey

@Orvillain said in How do I load a midi script programmatically?:

Yes, midi_processor does have an index assigned to it.

But is midi_processor itself an index? The documentation your posted indicates that first parameter is a buildIndex, and you're passing midi_processor.

Orvillain

@d-healey Yes, because builder.create(blahblahblah) returns the build index. So midi_processor is the build index. Variable name could be clearer, I grant you.

Orvillain

There is DEFINITELY something funky with this. If I start a new project, add a sampler, add a midi script processor to it, and then right-click the script processor in the module tree, choose 'connect to external script' and choose my script, it also fails.

But then if I unload the external script, all of a sudden my test variable is then right there in the onInit method.

If I write a script in HISE manually, right-click and save as a new file... and then try and connect to that file... again... HISE fails to connect....

If I then disconnect, the new script is there.

@Christoph-Hart I'm 100% convinced this is a bug.

Orvillain

I made a video showing what happens when you just try to connect to an external script manually, not even using code.

It seems to be broken.

d.healey

@Orvillain That's the correct behaviour. Once you're connected to an external script you lose those tabs. The idea is if it's external you shouldn't be editing it in HISE - although you still can in the main code editor but I think that's a more recent feature.

I made a video about this several years ago:

Orvillain

@d-healey Riiiiight. That seems very odd to me. HISE could at least draw in the scripts and make it read only, or otherwise indicate success. Because it looks broken to me, and is the same "symptom" as what I see when trying to connect a script in code.

The only difference being when I try to connect a script in code, I get an error that says "onControl could not be parsed!"

Hmmmmm. I guess I need to dig into this some more. Your tip about removing the "Scripts" folder from the path was a good one, but does not seem to have made any difference.

But now that you've said what you've said... I'm wondering, how do I even confirm the script has been attached successfully? It looks exactly the same in the actual project:

And alllllll this time, I've been assuming it didn't work properly because of how empty it looks, and also because of the parse error in the log.

d.healey

@Orvillain If you add controls to your scripts interface they will show up in that blank area.

Orvillain

Okay. I've gotten it to work by replacing the forward slash with a backslash. This is on Windows. I don't know if MacOS will cope with that???

I was reasonably sure that even on Windows this should work?? It works for a bunch of other things, iirc.

Lindon

@Orvillain you are going to have to use different separators based on the OS in question
fwd slash for mac os backslash for windows:

HISE | Docs

(docs.hise.dev)

Orvillain

@Lindon Thanks!

Really sorry for the n00b question here. It was just boggling my mind, and I was making it a lot more complicated than it needed to be.

d.healey

@Lindon said in How do I load a midi script programmatically?:

you are going to have to use different separators based on the OS in question
fwd slash for mac os backslash for windows:

You should be able to use the same on all OS and HISE will handle it. I think the issue here is you don't need to put a slash of any kind after {PROJECT_FOLDER} because that wildcard includes a slash.

Lindon

@d-healey said in How do I load a midi script programmatically?:

@Lindon said in How do I load a midi script programmatically?:

you are going to have to use different separators based on the OS in question
fwd slash for mac os backslash for windows:

You should be able to use the same on all OS and HISE will handle it. I think the issue here is you don't need to put a slash of any kind after {PROJECT_FOLDER} because that wildcard includes a slash.

You should, but my experience is you cant...

d.healey

@Lindon How do you include files or fonts?

I do this and it works on all systems

Engine.loadFontAs("{PROJECT_FOLDER}Fonts/Text/Inter-Regular.ttf", "regular");

Lindon

@d-healey I do what i've always done and put the font in the images folder and call this:

Engine.loadFontAs("{PROJECT_FOLDER}DIN Alternate Bold.otf", "DIN Alternate");

works everywhere.

Where it doesnt work is if you want to declare some sub-folder path i.e.

{PROJECTS}\mysub\yoursub\afile.ext

so its simple to work around:

// on init
const var WINDOWS = "WIN";
const var MAC = "OSX";
const var OS = Engine.getOS();


//elsewhere...

	if(OS == WINDOWS)
	{
		theLoopPlayers[pos].setFile(LP_LoopFileFolder + "\\"+ component.get("text") + ".wav");
	}else{
		theLoopPlayers[pos].setFile(LP_LoopFileFolder + "/"+ component.get("text") + ".wav");			
	};

You of course will also want to check for Linux...

How do I load a midi script programmatically?

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