ARDUINO_MIDImorphosis/docs/cc_viz.html at master · ArtScienceLab/ARDUINO_MIDImorphosis · GitHub

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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">

<title>MIDI signal visalizer</title>
<script type="text/javascript">
if (navigator.requestMIDIAccess) {
    navigator.requestMIDIAccess({
        sysex: false //not interested in sysex.
    }).then(onMIDISuccess, onMIDIFailure);
} else {
    alert("No MIDI support in your browser.");
}

var midi = null;

// midi functions
function onMIDISuccess(midiAccess) {
    // when we get a succesful response, run this code
    midi = midiAccess;
    onMidiAccess();
}

function onMidiMessageDo(thisFunction){
	var inputs = midi.inputs.values();
    // loop over all available inputs and listen for any MIDI input
    for (var input = inputs.next(); input && !input.done; input = inputs.next()) {
        // each time there is a midi message call the onMIDIMessage function
        input.value.onmidimessage = thisFunction;
    }
}

function onMIDIFailure(e) {
    // when we get a failed response, run this code
    console.log("No access to MIDI devices or your browser doesn't support WebMIDI API. Please use Web MIDI APIShim " + e);
}

function sendMidi(mesage,manufacturer){
	var list = midi.outputs;
	var devices = midi.outputs.values()
	var teensy = null

	for (let device of devices) {
		console.log(device.name)
    	if(manufacturer  == device.manufacturer){
    		teensy = device
    	}
	}
	teensy.send(message)
}
</script>
<style>
body{
	display: grid;
	margin:0;
	grid-template-columns: 1fr 5fr;
	grid-template-rows: 1fr;
	padding: 0;
	width: 100vw;
	height: 100vh;
	justify-content: center;
	font-family: "din-2014",sans-serif;
}
button{
	display: inline-block;
}

canvas{
	width: 100%;
	height: 100%;
	grid-row: 1;
	grid-column: 2;

	/*image-rendering: pixelated;*/
}
#controls{
	grid-row: 1;
	grid-column: 1;
	align-content: center;
	height:100%;
	border-right: gray 1px solid;
	padding-left: 0.5em;
}
label{
	display: block;
	margin-bottom: 0.2em;
	margin-right: 0.2em;
	padding: 0.1em;
}
</style>

</head>

<body>

<div id="controls">
	<h3>Inputs</h3>
	<label style="color:#e6194b"> <b>A0 </b><input type="checkbox" name="analogInput" id="A0" checked></input>
		<output name="analogValue"></output>
	</label>
	<label style="color:#3cb44b"> <b>A1 </b><input type="checkbox" name="analogInput" id="A1" checked></input>
		<output name="analogValue"></output>
	</label>
	<label style="color:#004040" > <b>A2 </b><input type="checkbox" name="analogInput" id="A2" checked></input>
		<output name="analogValue"></output>
	</label>
	<label style="color:#0082c8" > <b>A3 </b><input type="checkbox" name="analogInput" id="A3"></input>
		<output name="analogValue"></output>
	</label>
	<label style="color:#f58231"> <b>A4 </b><input type="checkbox" name="analogInput" id="A4"></input>
		<output name="analogValue"></output>
	</label>
	<label style="color:#911eb4"> <b>A5 </b><input type="checkbox" name="analogInput" id="A5"></input>
		<output name="analogValue"></output>
	</label>
	<label style="color:#46f0f0"> <b>A6 </b><input type="checkbox" name="analogInput" id="A6"></input>
		<output name="analogValue"></output>
	</label>
	<label style="color:#f032e6"> <b>A7 </b><input type="checkbox" name="analogInput" id="A7"></input>
		<output name="analogValue"></output>
	</label>

	<h3>Sample rate <small>(Hz)</small></h3>
	<label><input id="samplerate" step="1" min="1" max="8000" value="120" type="number"> <button id="set_sample_rate_button">Set</button></label>

	<h3>Data</h3>
	<label><button id="download_button">Download</button></label>

</div>

<canvas id="signals"></canvas>

<script type="text/javascript">


var midiManufacturer = "Teensyduino"
var canvas = document.getElementById("signals");
var checkboxes = document.getElementsByName("analogInput");
var outputElements = document.getElementsByName("analogValue");
var samplerateInput = document.getElementById("samplerate");
var setSampleRateButton = document.getElementById("set_sample_rate_button");
var downloadButton = document.getElementById("download_button");

var canvas = document.getElementById("signals");

var ctx = canvas.getContext("2d");
ctx.imageSmoothingEnabled = true;

canvas.width = canvas.clientWidth;
canvas.height = canvas.clientHeight;
//ctx.translate(0.5, 0.5);

var vizDuration = 10.0;//seconds
var currentTime = 0;

var colors = ["#e6194b", "#3cb44b", "#004040", "#0082c8", "#f58231", "#911eb4", "#46f0f0", "#f032e6", "#d2f53c", "#fabebe", "#008080", "#e6beff", "#aa6e28"];

var midiEvents = new Map();
var lastDataMap = new Map();
var incomplete = 0;

function onMidiAccess(){

	console.log('MIDI Access Object', midi);

	onMidiMessageDo(function (message) {
		data = message.data; // this gives us our [command/channel, note, velocity] data.
    	currentTime = message.timeStamp / 1000.0

    	if(data[1] % 2 == 0){
    		incomplete = data[2] * 128
    	}else{
    		analogValue = incomplete + data[2]
    		//see here https://ccrma.stanford.edu/~craig/articles/linuxmidi/misc/essenmidi.html
    		channel = data[0] - 0xB0

    		dataobject = { value: analogValue , channel: channel };
    		//console.log(channel);
    		//random prevents (limits) multiple objects with same key
    		midiEvents.set(currentTime + Math.random() / 1000000.0 , dataobject )
    	}
	});
}

setSampleRateButton.onclick = function(){
	//note on = sample rate between 1 and 127*127
	msb = Math.floor(Number(samplerateInput.value) / 127)
	lsb = Math.floor(Number(samplerateInput.value)  - msb * 127)
	message = [0xE0, msb, lsb]
	sendMidi(message,midiManufacturer)

	console.log("Change sample rate: " + samplerateInput.value)
}

downloadButton.onclick = function(){
	//note on = sample rate between 1 and 127*127
	exportToCsv("data.csv");
}

function draw(){

  //clear drawing area
  ctx.clearRect(0, 0, canvas.width, canvas.height);

  //draw layers
  drawAxis();
  drawSignals();
  //drawEvents();

  //request new animation frame (draw loop)
  currentFrame = window.requestAnimationFrame(draw);
}

function timeToX(timeToTransform){
	//currentTime = vid.currentTime
	start = currentTime-vizDuration;
	stop = currentTime;
	return (timeToTransform - start)/vizDuration * canvas.width
}

function signalValueToY(valueToTransform){
	maxValue = 127.0 * 127.0;
	return  canvas.height * 0.98 - valueToTransform/maxValue * canvas.height * 0.96
}

function drawAxis(){
	currentSec = Math.floor(currentTime);
	//show 10s of data
	for(i = currentSec; i>=0 && i >= currentSec - vizDuration ;  i--){
		ctx.fillRect(timeToX(i),0,1,20);
		ctx.fillRect(timeToX(i), canvas.height * 0.98,1, canvas.height * 0.98-25);
	}

}

function drawSignals(){
	start = currentTime - vizDuration;

	first = true;


 	for(i = 0 ; i < 8; i++){

 		if(!checkboxes[i].checked){
 			continue;
 		}

		ctx.beginPath();
 		ctx.strokeStyle = colors[i];
 		ctx.lineWidth = 2.5;

		for (const [key, value] of midiEvents.entries()) {
			if(key > start && key < currentTime && value.channel == i){
				//console.log(value)
					if(!first){
						ctx.lineTo(timeToX(key),signalValueToY(value.value));
					}
					first = false;
					//console.log(value)
					ctx.moveTo(timeToX(key),signalValueToY(value.value));

				lastDataMap[value.channel] = value.value;
			}
		}
		ctx.stroke();
	}

	//set output voltage
	for(channel = 0 ; channel < 8; channel++){
		if(checkboxes[channel].checked){
	    	outputElements[channel].value = Number(lastDataMap[channel] / 16384.0  * 3.3).toFixed(2) + " V"
	    } else{
	    	outputElements[channel].value = ""
	    }
	}


	//console.log(midiEvents.size)
	if(midiEvents.size > 3*50*30 * 100 ){
		var keyIterator = midiEvents.keys()
		while(midiEvents.size > 3*50*30 * 100 ){
			midiEvents.delete(keyIterator.next().value );
		}
	}
}

function exportToCsv(filename) {

	console.log("Will export CSV with");

    var rows = new Map();
    for (const [key, value] of midiEvents.entries()) {
    	ms_key = Math.round(key*1000);
    	if(!rows.has(ms_key)){
    		rows.set(ms_key,[]);
    		rows.get(ms_key).push(value.value);
    	}else{
    		rows.get(ms_key).push(value.value);
    	}
	}

	var csvFile = 'Time (ms) ,A0 (V),A1 (V),A2 (V),A3 (V),A4 (V),A5 (V),A6 (V),A7 (V)';
    for (const [key, value] of rows.entries()) {
    	csvFile += key + ",";
    	for (var i = 0; i < value.length; i++) {
        	csvFile +=  ("%.3f", value[i]/(128.0+128.0) * 3.3 ).toFixed(3) + ",";
    	}
    	csvFile += "\n";
	}

    var blob = new Blob([csvFile], { type: 'text/csv;charset=utf-8;' });
    if (navigator.msSaveBlob) { // IE 10+
        navigator.msSaveBlob(blob, filename);
    } else {
        var link = document.createElement("a");
        if (link.download !== undefined) { // feature detection
            // Browsers that support HTML5 download attribute
            var url = URL.createObjectURL(blob);
            link.setAttribute("href", url);
            link.setAttribute("download", filename);
            link.style.visibility = 'hidden';
            document.body.appendChild(link);
            link.click();
            document.body.removeChild(link);
        }
    }
}

draw();
</script>

</body>

</html>