polyedge.github.io/tone.html at main · PolyEdge/polyedge.github.io · GitHub

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<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, initial-scale=1.0">
		<title>tone</title>
	</head>
		<style>
			body {
				display: flex; flex-direction: row; justify-content: center; align-items: center;
				width: 100%; min-height: 100vh; margin: 0;
			}

			#keypad button {
				font-size: 28px;
				padding: 10px 24px;
				width: 100%;
			}

			#keypad button:disabled { pointer-events: none; }

			.extra {
				display: none;
			}

			#settings label, #settings select, #settings input {
				display: inline-block;
				vertical-align: middle;
				margin: 3px 2px;
			}

		</style>
		<script>
			var tone = tone || {};
			tone.dtmf = [1209, 1336, 1477, 1633, 697, 770, 852, 941];
			tone.extras = [
				[...tone.dtmf], // all dtmf tones combined
				[480, 620],     // busy tone
				[350, 440],     // dial tone
				[440, 480],     // ringing tone
				[1400, 2060, 2450, 2600] // off hook tone
			];
			tone.buttons = ["1", "2", "3", "A", "4", "5", "6", "B", "7", "8", "9", "C", "*", "0", "#", "D"];
			tone.tones = [];
			tone.cur_time = null;
			tone.cur_tone = null;
			tone.cur_string = null;
			tone.cur_mode = null;
			tone.cur_challenge = null;
			tone.cur_beaten = false;
			tone.cur_guessed = false;
			tone.score_wins = 0;
			tone.score_total = 0;

			tone.build_wave = function(tones, length) {
				var i2 = n => [n & 0xff, n >> 8 & 0xff];
				var i4 = n => [...i2(n), ...i2(n >> 16)];
				var smp_rt = 8000, smp_bits = 16, signed = true;
				var end_fade = 0.005 * smp_rt;
				var bit_rt = (smp_rt * smp_bits + 7) >> 3;
				var block = (smp_bits + 7) >> 3;
				var smp_count = Math.ceil(length / 1000 * smp_rt);
				var data_len = smp_count * block;
				var riff_len = 12 + 16 + 8 + data_len;
				var cycls = tones.map(x => smp_rt / x / 2 / Math.PI);
				var ceil = smp_bits == 32 ? 0xffffffff : (1 << smp_bits) - 1;
				var ampl = 1 / tones.length * (ceil >>> 1);

				var ar = [], out = new Uint8Array(8 + riff_len);
				ar.push(...[0x52, 0x49, 0x46, 0x46, ...i4(riff_len)       ]);
				ar.push(...[0x57, 0x41, 0x56, 0x45, 0x66, 0x6d, 0x74, 0x20]);
				ar.push(...[0x10, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00]);
				ar.push(...[...i4(smp_rt),          ...i4(bit_rt)         ]);
				ar.push(...[...i2(block),           ...i2(smp_bits)       ]);
				ar.push(...[0x64, 0x61, 0x74, 0x61, ...i4(data_len)       ]);

				for (var i = 0; i < ar.length; i++) out[i] = ar[i];
				var samp, pos = ar.length;
				for (var i = 0; i < smp_count; i++) {
					samp = 0;
					for (var j = 0; j < cycls.length; j++) samp += Math.sin(i / cycls[j]);
					if (i > smp_count - end_fade) samp *= (smp_count - i) / end_fade;
					if (!signed) samp = samp + 1;
					samp = Math.floor(samp * ampl);
					if (samp < 0) samp = samp + ceil + 1;
					for (var j = 0; j < block; j++) out[pos + j] = samp >>> (j << 3) & 0xff;
					pos += block;
				}

				return new Blob([out], {type: 'audio/wav'});
			};

			tone.build_tones = function() {
				var time = parseInt(document.querySelector('#o-time').value);
				if (time == tone.cur_time) return;
				tone.cur_time = time;
				var dtmf = [...Array(16).keys()].map(x => [tone.dtmf[x & 3], tone.dtmf[(x >> 2) + 4]]);
				var slots = [...dtmf, ...tone.extras];
				for (var i = 0; i < slots.length; i++) {
					var blob = tone.build_wave(slots[i], time);
					var audio = new Audio(URL.createObjectURL(blob));
					audio.load();
					tone.tones[i] = audio;
				}
				tone.volume(parseInt(document.querySelector('#o-volume').value));
			};

			tone.volume = function(volume) {
				document.querySelector('#o-volume').value = volume;
				volume /= 100;
				for (var item of tone.tones) item.volume = volume;
			};

			tone.play = function(id, pause) {
				var buffer = null;
				if (Array.isArray(id)) {
					if (id.length == 0) return;
					if (id.length != 1) buffer = id.slice(1);
					id = id[0];
				}
				if (tone.cur_tone != null) tone.cur_tone.stop();
				if (id == null) return;
				var sound = tone.tones[id];
				if (sound == null) return;

				var active = tone.cur_tone = {
					sound: sound.cloneNode(),
					buffer: buffer,
					pause: pause || null,
					play: function() {
						if (tone.cur_tone != this) return;
						this.handle = setTimeout(active.stop.bind(active, [true]), tone.cur_time + (this.pause || 10));
						this.sound.play();
					},
					stop: function(use_cb) {
						if (this.handle != null) clearTimeout(this.handle);
						if (tone.cur_tone != this) return;
						this.sound.pause();
						this.sound.currentTime = 0;
						tone.cur_tone = null;
						if (!use_cb || this.buffer == null || this.buffer.length == 0) return;
						while (this.buffer.length > 0) {
							if (typeof this.buffer[0] != "function") {
								tone.play(this.buffer, this.pause);
								break;
							}
							this.buffer.shift()();
							continue;
						}
					},
				};
				active.play();
			};

			tone.mode = function(mode) {
				if (tone.cur_mode == mode) return;
				tone.cur_mode = mode;
				tone.score_wins = tone.score_total = 0;
				tone.play(null);
				tone.next(true);
			};

			tone.next = function(force) {
				if (!force && !tone.cur_beaten) return;
				var disp = document.querySelector("#misc-disp");
				var options = [];
				for (var item of document.querySelectorAll("#keypad button")) {
					item.style.cssText = "";
					if (item.checkVisibility() && !item.disabled) options.push(parseInt(item.dataset.id));
				}
				tone.play(null);
				tone.set_beat(false);
				tone.cur_guessed = false;
				if (tone.cur_mode == "single") {
					tone.cur_challenge = options[Math.floor(Math.random() * options.length)];
					disp.textContent = "Score: " + tone.score_wins + " / " + tone.score_total;
				}
			};

			tone.challenge = function() {
				if (tone.cur_mode == "single") {
					tone.play(tone.cur_challenge);
				}
			};

			tone.set_beat = function(beat) {
				tone.cur_beaten = beat;
				document.querySelector("#c-beat").disabled = !beat;
			};

			tone.keypad_press = function(key) {
				if (tone.cur_mode == "lock" && key.tagName.toLowerCase() == "td") key = key.querySelector("button");
				if (key == null || key.tagName.toLowerCase() != "button") return;
				var key_id = parseInt(key.dataset.id);
				if (tone.cur_mode == "single") {
					tone.play(key_id);
					var beat = tone.cur_challenge == key_id;
					tone.score_total += tone.cur_guessed ? 0 : 1;
					tone.score_wins += tone.cur_guessed || !beat ? 0 : 1;
					tone.cur_guessed = true;
					if (!tone.cur_beaten) key.style.color = beat ? "#00FF00" : "#FF0000";
					if (beat) tone.set_beat(true);
				} else if (tone.cur_mode == "free") {
					tone.play(key_id);
				} else if (tone.cur_mode == "lock") {
					key.disabled = !key.disabled;
				}
			};

			window.onload = function() {
				var table = document.querySelector("#keypad");
				for (var i = 0; i < 16; i += 4) {
					var row = document.createElement("tr");
					for (var j = 0; j < 4; j++) {
						var id = i + j;
						var cell = document.createElement("td");
						var button = document.createElement("button");
						button.textContent = tone.buttons[i + j];
						button.dataset.id = id;
						cell.appendChild(button);
						row.appendChild(cell);
						if (j == 3) cell.classList.add("extra");
					}
					table.appendChild(row);
				}

				tone.build_tones();
				tone.set_beat(false);
				tone.mode("single");

				//const link = document.createElement('a');
				//link.href = url;
				//link.download = "test.wav";
				//document.body.appendChild(link);
				//link.click();
				//document.body.removeChild(link);
			};

		</script>
	<body>
		<div style="display: flex; flex-direction: column; align-items: center;">
			<h2>DTMF tone trainer</h2>

			<table id="settings" style="margin-bottom: 15px;" cellspacing="0" cellpadding="1">
				<tr>
					<td><label for="mode">Mode</label></td>
					<td><select name="mode" id="s-mode" onchange="tone.mode(this.value)">
					<option value="single">Single</option>
					<option value="string">String</option>
					<option value="free">Free</option>
					<option value="lock">Lock/Unlock</option>
					</select></td>
				</tr>
				<tr>
					<td><label for="volume">Volume:</label></td>
					<td><input type="range" id="s-volume" name="volume" min="0" max="20" value="15" oninput="tone.volume(this.value * 5)"></td>
					<td><output id="o-volume">75</output></td>
				</tr>
				<tr>
					<td><label for="digits">Time:</label></td>
					<td><input type="range" id="s-time" name="time" min="1" max="20" value="7" oninput="document.querySelector('#o-time').value = this.value * 50; tone.build_tones()" onmouseup=""></td>
					<td style="min-width: 35px;"><output id="o-time">350</output></td>
				</tr>
				<tr>
					<td><label for="digits">Digits:</label></td>
					<td><input type="range" id="s-digits" name="digits" min="1" max="16" value="10" oninput="document.querySelector('#o-digits').value = this.value"></td>
					<td><output id="o-digits">10</output></td>
				</tr>
			</table>
			<h3 id="misc-disp" style="margin-bottom: 15px; margin-top: 0px;"></h3>
			<div id="controls" style="margin-bottom: 15px;">
				<button id="c-play" style="display: inline-block" onclick="tone.challenge()">Play Tone</button>
				<button id="c-beat" style="display: inline-block" onclick="tone.next(false)">Next Question</button>
				<button id="c-confuse" style="display: inline-block" onclick="tone.play(16)">Mem</button>
			</div>
			<table id="keypad" style="min-width: 250px;" onclick="tone.keypad_press(event.target)"></table>
		</div>
	</body>
</html>