changes for TIFF files (synced to rocko)

    this.getFormat = () => this.format;

    this.getSrc = () => settings.src;

    function process_image_tiff(blob){

    function process_image_tiff(imagedata){

        IMAGE_FORMAT = "TIFF";

        obj.format = IMAGE_FORMAT;

        var arrayBuffer;

        var fileReader = new FileReader();

        fileReader.onload = function(event){

            arrayBuffer = event.target.result;

        // tiff.js which is limited in capabilities

        //var tiff = new Tiff({buffer: arrayBuffer});

        //var canvas = tiff.toCanvas();

        // UTIF.js

            var ifds = UTIF.decode(arrayBuffer);

            UTIF.decodeImage(arrayBuffer, ifds[0]);

        var ifds = UTIF.decode(imagedata);

        UTIF.decodeImage(imagedata, ifds[0]);

        if (ifds[0].t258==16){

            rgba_16bit = new Float32Array(ifds[0].data.filter((x,i) => i%2==0));

            rgba_16bit = rgba_16bit.map((x,i) => x + (ifds[0].data[2*i+1]<<8));

        var ctx = canvas.getContext('2d');

        ctx.putImageData(rgba_idata, 0, 0);

            cnv_working.trigger("canvas_ready");

            obj.busy = false;

            //Elphel.Canvas.drawScaled($(canvas),cnv_display,settings.width);

        Elphel.Canvas.drawScaled(cnv_working,cnv_display,settings.width);

        }

        fileReader.readAsArrayBuffer(blob);

        conclude_processing();

    }

    function process_image(imagedata){