Variable Persistence



  • Excellent!



  • I remember getting on with this before but I'm working on a little module now and the persistent storage doesn't seem to be working for me. Would you mind taking a look when you have the time? This module is an articulation switcher that seeks out containers that have a midiMuter with the same name as the container and counts them as articulations which can be muted or unmuted.

    HiseSnippet 2683.3oc6astbaabEFTRH0j1HMIi+Qm9qsb5jP5KTjV4Vkpq0U6xwVwbDk8zY73IcEvRxMBDfC1ERVwidm5iPej7aP64rKtRAJAYSKmKVw1ivhy4re645GHX5E3ayDB+.iJWe+SlvLpbCy9m3IGs0HJ2yn61FU9DSISHM17jITgf4XToxhOBuWkpKYn94MOXSpK0ylktjgwy841rmvGykoq1a8GycceH0gsOebFo+506Z66skuqeHfiEMaaLgZeHcH6GnnXKXZbDmcrvnRayUtWqfC6bvOuQqje1W8ui1czeSzGWda7xdJALrCCBXdxmCpaTwrx+C9oh4NNboePeIENWvpa56bR+Q9G6o25myE7CbY3EcL5CXRu7C8ccvCO96c8jrfATaVF0L1ZD20oWr6TX.VtWpycQsy8ll6xc3Iqm5j+L0MHoZj0cWYg7PdobPtSVH2tPH2o.3YjAcKoQG.BemPWpLOxvnczM39d4PF5I7Db4IYyF9fB2O2rGWZOpX7tPA3EBTuuwaTv2xbmACX1xTvtj4C+WWsQ5qMih7qatkumDthELOpz+2ktRuxhm2ItTkierz6ikd+JtzqpoHTfkderv6sKbbIfWkylJ+4l8sC3Sjo2Aw1WDs5LPm9lFK7W9ylKeqaUibKx9boKaUxFARtcT5Oo+wX8.KfbTmVsg+6mDnjaDJG4GrJYa5QbGx+jQcYmfquMbPWkrR6ka+sKeu1c9NbMnVhOfybld8m.QdOAH9i58jiVgbWxHobhX0kW93iOt0PuvV9ACW1UKjX4gSbu6Jv9y7ZMRN1s1sVtVsAgd1JP1iEH3Bn1TB.f1nYsWWqpbDWzZB0i4RtOAGL.2sE0woGtTi5SxoR86PZC+o4ZY0qkfIaT+HcPBjX.0UvJRDA8HVWudAL3JPNYPXAh8bpaHqwqOs4ZjkWlLldHiHBCXD4HFQIzWIHGgxP3BBk3evOA050pFYFv.vwH9.23P1I2QKcyZUgCa18ZX7d07EfXuDTSIH.nSWKwdCOi8hLT.SFF3Qls8z1A9SM3Xryqnim3xHgBfoasinADAjuC+NXbO1wmIv.ZAkvBIQIpR2fm.B.hq5nfaVWGbkF06qucckC6Q.dijm3ALpEYric7T+YYoDZAo1JQGAg6j0XzLI+BvXu3knJc2VP7GjpE3enRxHHtCgpwXGfwg.eZxwi7ELR2sIbOa2PGlPEdSUCgdlMSozrPM1XYWTfTTq50nVSg5LVxAbuZzVKfMj.ApnB2zyvFttDn3mOzi4fBPDQRnzHjZaWrnp6nRgzRF87HpDfG8rtYONdgak5WyU0sk+3C72z+UYBFhzhtbl3wyT0GCfVer.U67MEo7yzGiBU+Yar0VfhqzNRQ.+87mfwZ1TPG1iQpHmJUaVQ9wwAHQsA9AjFbXiauFgS96oA1VtLugxQvp291MAO6NT6Qjc6tcWcXDaToz0FxXxmHmHcxp5BT9.Ric7FBKzZLUE+1iMj8pFIa4K3u7Nj5MpStMwF9a8l0ah1p6POenciZuUxJzGEGeuuRFmuVT5ZU01p1WLKCLO49POEetSSRxBjWepJwwwIpyEAOVY7Z95TTZP.8DzbQZ1RW2jI8O2f1bmplw6Plx.bWvdU42JtTn2t3tnUqlqtt0jPwnF1IFLUYnzEzWgRLrmUqn9Nfsxkrf4XckrwQlKIiJ0lNA9Sbfg9fpmBMOqcZtLuG2mP8bHXxYhjmMgpy89dcNDlwnJRR12njgHW2O3KUejCM3MyiGXeRABGCgsIOHtjIwX02lKnv3Nm5MIqdl6xyaxbXFOVICj88Pb7TO8nXL0ISGoVQtFQicgfLLr.wtB2giOfEznoJecCDwx.9vgr.nKjM008.p8g5h.k6wAqYvvbRohJlybYigZ+37VGcJFNAcCIXuCfqZ.c.5nNKXVDghs6xFoO3DhCa.MzUVKI0u0gBzoMKHC15g9gPfjh3VUYhppfvLwPaEFdlGdWTvSyjhLsubv.syDtWlag4gA9ttHFhc0YfX5siAJdF5P9xujTnTQC5I+C.ZHxf.bZWGbPPgwtynuxcreRrSkmjxsIdvBVn4kywGGyJW38BbtkL.WUYDcHVOD79mquIajVcvRh0Q3ozQaU3dVwb7QeBRh3.AcqxyP2ZVTzsJhit0rHoa8NyR2BnoaUyZ1D0sp8Zq2Vp5VkfqtUIIqaMWXqCVw5B4qCRfm4xvX2BoZmwnEPZO1ZWLs8Hig+05LT2sJC2cTw4D6cq4J8cqqT96VyMB74cnoT3st7b3sJOIdqbr30YC.Odq4.Qdq2Il7Vu0T40Gh4DYdq2Z175tYklOebs6UMidbOUa77jSu0UModq4Iqdq2AZ8ntmhcWglqSkHVH2dqYStWm.8tRu258B+9nSWAT70nddRxOtxnD7.SSle23Ahms2dp9Jc0vnTz+TRd5zYNEQ4W4bm9tYY8m58mu79y1c58Oy+zvXIi4Wj2trQ8pVyE9+ZqDgoxmBnyAN2LgnGD37xCZ3oBxoLLQbnYFDcqDdh1TfeSDOuUIpMO5J7v1nN5lqq3CW8f.F8v0z0EJ0x0ebUktQrHhYrd2N34aqnEOSHS2XKgcsdzSjIdITzc6NM0ac03FSIxlWTLNABOSX93H3koeThx4wZeINBU.nT6SgztwTANDB6cmevVFjlwH47ghDe3czoup38DGraZ5iwDG.lE7wit9.fGzhPdAfJh62bFVpLxy7d1pUtWjksl5VFA8855wkOcBK5EzEOD4LqLXP1kRKBytppxn.whWpvWlYDcRCiJKEINHpL5ErF8Vzvmexf6fucu7O6ogx6l88WZLsQ9rHiDyUUYmaj9MSPLsMdyCJqMRIM+1ZiOwD6XUf1e7k4+6vWl+M0P4KL6Kgp8wbugQOz9GxWoeu.lqO0oO+myH1+c8MCA2UP9U+Oqq1pMFCSiysWQGi8XSXTID8yAu816QA9gSlVq27.Utx9A.8SvSj8FO0C+RxIyZjsB7EhAvwQYKQ1a0KLXH5qxririf597qAzxfPuGznA+56UoBrjF06Rmn91BN8WwuqUtuZCf5p1WYxS1jOLiowUxWDmQzji093yHjY2N+jpJexud9FSDAuqal7oyD8ckH45hR6md.3hkCWm67mEltk8mF0xdyPoD5UgMr+TSt5g7iV5hG+TfM9ilC3upuLz9Pbxpn.ibk08ewx0B6BBg+gXL1mio063cDzx.VQ2xeaMy9jUuPPBLzgZ9zUt456AzAApXoK8WW+IvraZP9dIWpyWmxe9NuXvexTCWB1Gk7aiIwK969IwmmqCpn0eP8vtGH+Edb9FlpAhDbR+GJntmenDlfuKEdv6WAyQgQs8A5E1rrCbW.6cputMdMBn9LOm1weE6itYmjoyvM6DeSC6XSAmsneW87AUVj4o930PBltvbe2rozBfDCBIX7tg90gLFGIuD54f05SOho6vnwyLYprK2tmO3LwOzSzMr1Uyg92J6wXpcf+OZqmbhgvqoVA7jdp+e0np4t30jNwiJwjN78C7i11X2g6BocEqw8tzZrxkViu9Rqw2bo03auzZ7cWZM99yQCjK1FgR+w5YEFF+e8fXD6B
    


  • I think the problem is that you are storing the initial object in the onInit callback which gets overwritten by any value in the onControl callback of the ScriptPanel.

    A better solution is to use a dedicated variable for the object and think of the panel as "restorer" (not as actual container for data). This script might explain this idea:

    /** The restorer.
    *
    *    This panel will restore the storage object in its control callback. If the value is not an object, it won't do anything but use the given storage variable as value (see the onControl callback)
    */
    const var restorer = Content.addPanel("restorer", 0, 0);
    restorer.set("saveInPreset", true);
    restorer.set("visible", false);
    
    /** The data object. This will be overwritten by the onControl callback of the restorer */
    reg storage = {};
    
    /** Checks if a given variable is an object. */
    inline function isObject(variable)
    {
        return typeof(variable) == "object";
    };
    
    const var Knob = Content.addKnob("Knob", 0, 0);
    
    // Make the knob non persistent for demonstrating purposes
    Knob.set("saveInPreset", false);
    
    
    inline function onKnobControl(component, value)
    {
        // Just use the storage object (ignore the restorer)
        storage.a = value;
    };
    
    Knob.setControlCallback(onKnobControl);
    
    function onNoteOn() {}
    function onNoteOff() {}
    function onController() {}
    function onTimer() {}
    function onControl(number, value)
    {
        if(number == restorer)
        {
            // Check in the callback if the value is an object
            // If not, set the value to the storage object
            
            if(isObject(value))
            {
                // Copy the object from the restorer to the storage variable
                storage = value;
                Console.print("Restoring storage");
                
                Console.print("The restored knob value is: " + storage.a);
            }
            else    
            {    
                restorer.setValue(storage);
                Console.print("Initialising restorer");
            }
        }
    }
    


  • Thanks Christoph, I think I get it (again). This is what happens when I stop coding in HISE for a month I forget everything



  • What's the advantage of using an inline function for the control callback over putting it in the usual onControl callback?



  • It might be a bit faster with big scripts because it doesn't need to resolve the big switch statement. Also you can assign the functions dynamically but in the end it's just a matter of taste 🙂



  • @Christoph-Hart So if I :

    this.panel.set("saveInPreset", false);

    in your function - do i get to persist a piece of data but NOT store it in any preset?



  • @Lindon It's been a long time since I used this since I haven't needed to persist any data that wasn't stored already in another control. What's your specific use case? it will probably turn out there is a more straightforward solution.



  • Hi @d-healey @Christoph-Hart ,

    Reading through these solutions for data persistence and wanted to ask about scale. Would this still be the approach if you were storing 1,000,000 points of data? And before you ask "is it really necessary" let's assume it is. 🙂

    Similarly, is there any solution for serialization directly to/from disk to avoid storing that quantity of data in every preset (when such data is shared among multiple presets?

    Thanks!



  • @dxmachina said in Variable Persistence:

    Would this still be the approach if you were storing 1,000,000 points of data?

    Try it and report back.



  • @dxmachina

    "Similarly, is there any solution for serialization directly to/from disk to avoid storing that quantity of data in every preset (when such data is shared among multiple presets?"

    Theres the all new saveAsJSON() and loadFromJSON()


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