initial commit

2026-04-22 03:30:16 -05:00
commit 313035d85a
14 changed files with 1391 additions and 0 deletions
--- a/FT2.ttf
+++ b/FT2.ttf
--- a/FT2.woff
+++ b/FT2.woff
--- a/background.js
+++ b/background.js
@@ -0,0 +1,28 @@
+browser.browserAction.onClicked.addListener(() => {
+	browser.tabs.create({
+		url: browser.runtime.getURL("player.html")
+	});
+});
+
+browser.webRequest.onBeforeRequest.addListener(
+	(details) => {
+		const url = details.url.toLowerCase();
+		if (isSupportedMediaUrl(url)) {
+			const playerUrl = browser.runtime.getURL("player.html") + "?media=" + encodeURIComponent(details.url);
+			
+			return { redirectUrl: playerUrl };
+		}
+
+		return {};
+	},
+	{
+		urls: ["<all_urls>"],
+		types: ["main_frame", "sub_frame"]
+	},
+	["blocking"]
+);
+
+function isSupportedMediaUrl(url) {
+	return url.match(/\.(669|amf|it|mod|mtm|mptm|s3m|stm|ult|uni|xm|umx)$/i) ||
+			url.match(/^(669|amf|it|mod|mtm|mptm|s3m|stm|ult|uni|xm|umx)\./i);
+}
--- a/build.sh
+++ b/build.sh
@@ -0,0 +1,36 @@
+#!/bin/bash
+# Change this if it differs
+EMHOME=${EMHOME:=/usr/lib/emscripten/}
+
+cd libxmp
+mkdir -p build
+cd build
+echo "_malloc
+_free
+_xmp_create_context
+_xmp_free_context
+_xmp_load_module
+_xmp_release_module
+_xmp_play_buffer
+_xmp_play_frame
+_xmp_get_format_list
+_xmp_get_module_info
+_xmp_set_player
+_xmp_get_player
+_xmp_get_frame_info
+_xmp_start_player
+_xmp_end_player
+_xmp_restart_module
+_xmp_seek_time
+_xmp_channel_mute
+_xmp_channel_vol
+_xmp_inject_event
+_xmp_test_module_from_memory
+_xmp_load_module_from_memory" > exported.txt
+$EMHOME/emcmake cmake ..
+$EMHOME/emmake make -j4
+$EMHOME/emcc -O3 libxmp.a -o libxmp.js -s WASM=1 -s EXPORTED_FUNCTIONS=@exported.txt -s EXPORT_ALL=1 -s BINARYEN_METHOD="native-wasm" -s EXPORTED_RUNTIME_METHODS='["cwrap","UTF8ToString","HEAPU8","HEAPF32","HEAP16"]' -s ALLOW_MEMORY_GROWTH=1 -s MODULARIZE=1 -s JSPI=1 -s EXPORT_NAME='libxmp' -s ENVIRONMENT='web,worker' -s SINGLE_FILE=0
+cd ..
+cd ..
+cp libxmp/build/libxmp.js libxmp/build/libxmp.wasm .
+zip -r waxmplayer.xpi . -x "libxmp/*" "waxmplayer.xpi"
--- a/icon-48.png
+++ b/icon-48.png
--- a/icon-96.png
+++ b/icon-96.png
--- a/libxmp.LICENSE
+++ b/libxmp.LICENSE
@@ -0,0 +1,20 @@
+Extended Module Player
+Copyright (C) 1996-2026 Claudio Matsuoka and Hipolito Carraro Jr
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the "Software"),
+to deal in the Software without restriction, including without limitation
+the rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
--- a/manifest.json
+++ b/manifest.json
@@ -0,0 +1,33 @@
+{
+	"manifest_version": 2,
+	"name": "WaXMPlayer",
+	"version": "1.0",
+	"description": "View and play module files in a tracker",
+	"author": "Kouya Heika",
+	"browser_action": {
+		"default_icon": {
+			"48": "icon-48.png"
+		},
+		"default_title": "Open WaXMPlayer"
+	},
+	"background": {
+		"scripts": [ "background.js" ]
+	},
+	"permissions": [
+		"tabs",
+		"webRequest",
+		"webRequestBlocking",
+		"<all_urls>"
+	],
+	"web_accessible_resources": [
+		"player.html"
+	],
+	"browser_specific_settings": {
+		"gecko": {
+			"id": "waxmplayer@kouya.canithesis.org",
+			"data_collection_permissions": {
+				"required": [ "none" ]
+			}
+		}
+	}
+}
--- a/player.css
+++ b/player.css
@@ -0,0 +1,313 @@
+@font-face {
+	font-family: FT2;
+	src: url('FT2.woff'), url('FT2.ttf') format("truetype");
+}
+
+:root {
+	--background: #000000;
+	--text-color: #FFFFFF;
+	--header-background: #4D749B;
+	--header-background2: linear-gradient(180deg,rgba(77, 116, 155, 1) 0%, rgba(39, 59, 79, 1) 100%);
+	--header-border: 1px outset var(--header-background);
+	--box-shadow: 2px 2px 0px black;
+	--channel-background: #273A4E;
+	--channel-background2: linear-gradient(180deg,rgba(39, 58, 78, 1) 0%, rgba(26, 39, 52, 1) 100%);
+	--button-background: #E0E0E0;
+	--button-background2: linear-gradient(180deg,rgba(224, 224, 224, 1) 0%, rgba(136, 136, 136, 1) 100%);
+	--button-border: 1px outset var(--button-background);
+	--active-button-background: #A7A7A7;
+	--active-button-background2: linear-gradient(180deg, #A7A7A7 0%, #676767 100%);
+	--active-button-border: 1px outset var(--active-button-background);
+	--button-outline: 1px solid black;
+	--border-color: #406080;
+	--input-border: 2px inset var(--border-color);
+	--row-borders: 4px ridge var(--border-color);
+	--table-heading-background: #273A4E;
+	--table-heading-background2: linear-gradient(180deg,rgba(39, 58, 78, 1) 0%, rgba(26, 39, 52, 1) 100%);
+	--font-family: FT2;
+
+	--playhead-background: #602040;
+	--playhead-border-width: 2px;
+	--playhead-light-background: #7F2A55;
+	--playhead-dark-background: #301020;
+}
+
+html, body {
+	background: var(--background);
+	height: 100vh;
+	margin: 0px; padding: 0px;
+	font-family: var(--font-family);
+}
+
+div.tracker {
+	display: flex;
+	flex-direction: column;
+	height: 100%;
+}
+
+div.tracker .header {
+	background: var(--header-background);
+	background: var(--header-background2);
+	border: var(--header-border);
+	padding: 2px;
+}
+
+div.tracker button {
+	background: var(--button-background);
+	background: var(--button-background2);
+	border: var(--button-border);
+	outline: var(--button-outline);
+	box-shadow: var(----box-shadow);
+	font-family: var(--font-family);
+	font-size: 18px;
+	margin: 2px;
+}
+
+div.tracker input {
+	background: var(--background);
+	color: var(--text-color);
+	border: var(--input-border);
+	font-family: var(--font-family);
+	font-size: 16px;
+}
+
+div.tracker .header > .box { display: grid; }
+
+div.tracker .header .holder {
+	overflow-x: auto;
+}
+
+div.tracker .header .controls {
+	display: grid;
+	grid-template-columns: repeat(4, 1fr);
+	grid-template-rows: repeat(4, 1fr);
+	padding: 2px;
+	width: 580px;
+	min-height: 132px;
+}
+body.tracker div.tracker .header .controls { grid-template-columns: repeat(8, 1fr); width: 1162px; }
+
+div.tracker .header .controls hr { margin: 2px; margin-bottom: 6px; border: 2px inset var(--header-background); }
+div.tracker .header .controls .part {
+	background: var(--header-background);
+	background: var(--header-background2);
+	border: var(--header-border);
+	color: white;
+}
+div.tracker .header .controls .title-div { display: flex; grid-column: span 3 / span 3; }
+div.tracker .header .controls .player-div { padding: 10px 0px 0px 0px; text-align: center; grid-column: span 2 / span 2; grid-column-start: 3; grid-row-start: 3; }
+div.tracker .header .controls .type-div { margin: 2px; display: flex; grid-column: span 2 / span 2; grid-row-start: 4; }
+div.tracker .header .controls .bpm-div { padding: 10px 0px 0px 0px; text-align: center; grid-column-start: 4; }
+div.tracker .header .controls .vol-div { display:flex; min-width: 280px; gap: 4px; grid-column: span 2 / span 2; grid-column-start: 1; grid-row-start: 2; }
+div.tracker .header .controls .stsep-div { display:flex; min-width: 280px; gap: 4px; grid-column: span 2 / span 2; grid-column-start: 3; grid-row-start: 2; }
+
+div.tracker .header .controls .instruments-div,
+div.tracker .header .controls .samples-div { display: none; }
+
+body.tracker div.tracker .header .controls .instruments-div {
+	grid-column: span 2 / span 2;
+	grid-row: span 4 / span 4;
+	grid-column-start: 5;
+	grid-row-start: 1;
+	display: unset;
+}
+
+body.tracker div.tracker .header .controls .samples-div {
+	grid-column: span 2 / span 2;
+	grid-row: span 4 / span 4;
+	grid-column-start: 7;
+	grid-row-start: 1;
+	display: unset;
+}
+
+div.tracker .header .controls button#play { grid-column-start: 1; grid-row-start: 3; }
+div.tracker .header .controls button#pause { grid-column-start: 1; grid-row-start: 4; }
+div.tracker .header .controls button#stop { grid-column-start: 2; grid-row-start: 3; }
+div.tracker .header .controls button#download { grid-column-start: 2; grid-row-start: 4; }
+
+div.tracker .header .controls .title-div .title { display: flex; }
+div.tracker .header .controls .title-div .part { flex-grow: 1; }
+div.tracker .header .controls .title-div .part:not(.title) { padding: 10px 0px 0px 0px; text-align: center; }
+
+div.tracker .header .controls .vol-div img,
+div.tracker .header .controls .stsep-div img { padding: 6px; }
+
+div.tracker .header .controls .vol-div .vol-text,
+div.tracker .header .controls .stsep-div .stsep-text { margin: 4px 0px; width: 40px; padding :4px 10px; }
+
+div.tracker .header .controls .container {
+	overflow-x: clip; overflow-x: auto;
+	height: 132px;
+	font-size: 14px;
+}
+
+div.tracker .header .controls .container .instruments,
+div.tracker .header .controls .container .samples {
+	border-collapse: collapse;
+	background: var(--background);
+	width: 100%;
+}
+
+div.tracker .header .controls .container .instruments tr th:last-of-type,
+div.tracker .header .controls .container .instruments tr td:last-of-type,
+div.tracker .header .controls .container .samples tr th:last-of-type,
+div.tracker .header .controls .container .samples tr td:last-of-type {
+	border-right-style: outset;
+	border-right-width: 2px;
+}
+
+div.tracker .header .controls .container .instruments tr,
+div.tracker .header .controls .container .samples tr {
+	background: var(--border-color);
+}
+
+div.tracker .header .controls .container .instruments tr:nth-of-type(1),
+div.tracker .header .controls .container .samples tr:nth-of-type(1) {
+	position: sticky;
+	top: 0px;
+	z-index: 10;
+}
+
+div.tracker .header .controls .container .instruments th,
+div.tracker .header .controls .container .samples th {
+	background: var(--table-heading-background);
+	background: var(--table-heading-background2);
+	border-left: var(--row-borders); border-right: var(--row-borders); border-bottom: var(--row-borders);
+}
+
+div.tracker .header .controls .container .instruments td,
+div.tracker .header .controls .container .samples td {
+	background: var(--background);
+	border-left: var(--row-borders); border-right: var(--row-borders);
+}
+
+input[type="range"]::-moz-range-track { background: none; }
+input[type="range"]::slider-track { background: none; }
+
+input[type="range"]::-moz-range-progress { background: none; }
+input[type="range"]::slider-fill { background: none; }
+
+input[type="range"]::-moz-range-thumb {
+	background: var(--button-background);
+	background: var(--button-background2);
+	border: var(--button-border);
+	outline: var(--button-outline);
+	border-radius: 0px;
+}
+input[type="range"]::slider-thumb {
+	background: var(--button-background);
+	background: var(--button-background2);
+	border: var(--button-border);
+	outline: var(--button-outline);
+	border-radius: 0px;
+}
+
+div.tracker .header .controls .title-div .title input,
+div.tracker .header .controls .type-div input { flex-grow: 1; }
+div.tracker .header .curtime, div.tracker .header .totaltime { }
+div.tracker .header .speed, div.tracker .header .bpm { display: inline-block; margin: 2px; }
+
+div.tracker .header .order-box {
+	background: var(--background);
+	border: var(--input-border);
+	overflow-x: auto;
+	-ms-overflow-style: none;
+	scrollbar-width: none;
+	display: none;
+}
+
+body.tracker div.tracker .header .order-box { display: block; }
+
+div.tracker .header .order-box::-webkit-scrollbar {
+	width: 0px;
+	background: transparent;
+}
+
+div.tracker .header .order-box .orders {
+	display: inline flex;
+}
+
+div.tracker .header .order-box .orders > * {
+	background: var(--button-background);
+	background: var(--button-background2);
+	border: var(--button-border);
+	outline: var(--button-outline);
+	display: inline-block;
+	font-size: 16px;
+	width: 24px;
+	text-align: center;
+	padding-top: 4px;
+}
+
+div.tracker .header .order-box .orders > *.active {
+	background: var(--active-button-background);
+	background: var(--active-button-background);
+	border: var(--active-button-border);
+}
+
+div.tracker .patterns {
+	font-family: hack, monospace;
+	background: var(--background);
+	color: var(--text-color);
+	white-space: nowrap;
+	overflow: auto;
+	display: none;
+}
+body.tracker div.tracker .patterns { display: unset; }
+
+div.tracker .patterns .pattern {
+	background: var(--background);
+	color: var(--text-color);
+	font-family: monospace;
+	margin: 0px;
+	white-space: nowrap;
+	border-collapse: collapse;
+}
+
+div.tracker .patterns .pattern tr {
+	background: var(--border-color);
+}
+
+div.tracker .patterns .pattern tr:nth-of-type(1) {
+	position: sticky;
+	top: 0px;
+	z-index: 10;
+}
+
+div.tracker .patterns .pattern .channel .visualizer meter::-webkit-meter-bar { background: none; }
+div.tracker .patterns .pattern .channel .visualizer meter {
+	background: var(--background);
+	border: var(--input-border);
+	width: 30px;
+}
+
+div.tracker .patterns .pattern .channel .visualizer meter.left { border-right: none; direction: rtl; }
+div.tracker .patterns .pattern .channel .visualizer meter.right { border-left: none; }
+
+div.tracker .patterns .pattern tr.playhead td {
+	background: var(--playhead-background);
+	border-top: var(--playhead-border-width) solid var(--playhead-light-background);
+	border-bottom: var(--playhead-border-width) solid var(--playhead-dark-background);
+	font-weight: bold;
+}
+
+div.tracker .patterns .pattern tr.gap td {
+	height: 50vh;
+}
+
+div.tracker .patterns .pattern th {
+	background: var(--table-heading-background);
+	background: var(--table-heading-background2);
+	border-left: var(--row-borders); border-right: var(--row-borders); border-bottom: var(--row-borders);
+}
+
+div.tracker .patterns .pattern td {
+	background: var(--background);
+	border-left: var(--row-borders); border-right: var(--row-borders);
+}
+
+div.tracker .patterns .pattern td#no { color: yellow; }
+div.tracker .patterns .pattern td a.instrument { color: #80E0FF; }
+div.tracker .patterns .pattern td a.volume { color: #80FF80; }
+div.tracker .patterns .pattern td a.effect_type { color: #FF80E0; }
+div.tracker .patterns .pattern td a.effect_param { color: #FFE080; }
--- a/player.html
+++ b/player.html
@@ -0,0 +1,67 @@
+<!DOCTYPE html>
+<html>
+	<head>
+		<title>WaXMPlayer</title>
+		<link rel="icon" href="icon-48.png" type="image/png" sizes="64x64" />
+		<link rel="stylesheet" href="player.css" />
+		<script type="text/javascript" src="libxmp.js"></script>
+	</head>
+	<body class='tracker'>
+		<div class='tracker'>
+			<div class='header'>
+				<div class='holder'>
+					<div class='controls'>
+						<div class='type-div'><input type='text' name='type' value='drop file to play' readonly='1' /></div>
+						<div class='title-div'>
+							<div class='curtime part'>00:00</div>
+							<div class='title part'><input type='text' name='title' value='' readonly='1' /></div>
+							<div class='totaltime part'>00:00</div>
+						</div>
+						<div class='bpm-div part'><a class='speed'>0</a> / <a class='bpm'>0</a> bpm</div>
+						<div class='vol-div part' title='Volume'><img src='volume.png' width='16' height='16' /><input type='range' name='volume' min='0' max='200' value='100' step='5' list='range-markers' /><div class='vol-text'>100%</div></div>
+						<div class='stsep-div part' title='Stereo Separation'><img src='stereo.png' width='16' height='16' /><input type='range' name='stereo' min='0' max='100' value='100' step='5' list='range-markers' /><div class='stsep-text'>50%</div></div>
+						<div class='player-div part'>WaXMPlayer 1.0</div>
+						<button id="play" disabled>Play Song</button>
+						<button id="pause" disabled>Pause</button>
+						<button id="stop" disabled>Stop</button>
+						<button id="download" disabled>Download</button>
+
+						<div class='instruments-div part'>
+							<div class='container'>
+								<table class='instruments' width='100'>
+									<tr><th colspan='2'>Instruments</th></tr>
+								</table>
+							</div>
+						</div>
+						<div class='samples-div part'>
+							<div class='container'>
+								<table class='samples' width='100'>
+									<tr><th colspan='2'>Samples</th></tr>
+								</table>
+							</div>
+						</div>
+
+
+						<datalist id="range-markers">
+							<option value="0"></option>
+							<option value="25"></option>
+							<option value="50"></option>
+							<option value="75"></option>
+							<option value="100"></option>
+							<option value="125"></option>
+							<option value="150"></option>
+							<option value="175"></option>
+							<option value="200"></option>
+						</datalist>
+					</div>
+				</div>
+				<div class='order-box'>
+					<div class='orders'></div>
+				</div>
+			</div>
+			<div class='patterns'><noscript>You need Javascript enabled for this to work.</noscript></div>
+		</div>
+		<script src='player.js'></script>
+	</body>
+</html>
+
--- a/player.js
+++ b/player.js
@@ -0,0 +1,894 @@
+const XMP_NAME_SIZE = 64;
+const XMP_MAX_MOD_LENGTH = 256;
+const XMP_MAX_ENV_POINTS = 32;
+const XMP_MAX_KEYS = 121;
+const XMP_MAX_CHANNELS = 64;
+
+const SR = 44100;
+const BUF = 1024;
+const BYTES = BUF * 4;
+const NOTES = ["C ", "C#", "D ", "D#", "E ", "F ", "F#", "G ", "G#", "A ", "A#", "B "];
+const EFFECTS_MAP = new Map([
+	[
+		'669',
+		new Map([
+			[96, 'A'], [97, 'B'], [98, 'C'], [99, 'D'], [100, 'E'], [126, 'F']
+		])
+	],
+	[
+		'Farandole',
+		new Map([
+			[249, '1'], [248, '2'], [122, '3'], [251, '4'], [254, '5'], [4, '6'],
+			[256, '7'], [252, '8'], [123, '9'], [250, 'C'], [15, 'F']
+		])
+	],
+	[
+		'Imago Orpheus',
+		new Map([
+			[1, '1'], [2, '2'], [3, '3'], [4, '4'], [5, '5'], [6, '6'],
+			[7, '7'], [8, '8'], [9, '9'], [10, 'A'], [11, 'B'], [12, 'C'],
+			[13, 'D'], [14, 'E'], [15, 'F'], [16, 'G'], [17, 'H'], [18, 'I'],
+			[19, 'J'], [20, 'K'], [21, 'L'], [22, 'M'], [23, 'N'], [24, 'O'],
+			[25, 'P'], [26, 'Q'], [27, 'R'], [28, 'S'], [29, 'T'], [30, 'U'],
+			[31, 'V'], [32, 'W'], [33, 'X'], [34, 'Y'], [35, 'Z']
+		])
+	],
+	[
+		'S3M',
+		new Map([
+			[163, 'A'], [11, 'B'], [13, 'C'], [10, 'D'], [2, 'E'], [1, 'F'],
+			[3, 'G'], [4, 'H'], [29, 'I'], [180, 'J'], [6, 'K'], [5, 'L'],
+			[9, 'O'], [27, 'Q'], [7, 'R'], [254, 'S'], [171, 'T'], [172, 'U'],
+			[16, 'V'], [8, 'X'], [141, 'X'], [14, 'S']
+		])
+	],
+	[
+		'IT',
+		new Map([
+			[163, 'A'], [11, 'B'], [142, 'C'], [10, 'D'], [2, 'E'], [1, 'F'],
+			[3, 'G'], [4, 'H'], [29, 'I'], [180, 'J'], [6, 'K'], [5, 'L'],
+			[128, 'M'], [129, 'N'], [9, 'O'], [137, 'P'], [27, 'Q'], [7, 'R'],
+			[254, 'S'], [135, 'T'], [172, 'U'], [16, 'V'], [17, 'W'], [8, 'X'],
+			[138, 'Y'], [141, 'S'], [136, 'S'], [14, 'S'], [192, 'c'], [193, 'd'],
+			[194, 'a'], [195, 'b'], [132, 'S'], [139, 'S'], [140, 'S']
+		])
+	],
+	[
+		'LIQ',
+		new Map([
+			[0, 'A'], [171, 'B'], [13, 'C'], [2, 'D'], [172, 'F'], [11, 'J'],
+			[10, 'L'], [14, 'M'], [3, 'N'], [9, 'O'], [163, 'S'], [7, 'T'],
+			[1, 'U'], [4, 'V'], [5, 'X'], [6, 'Y']
+		])
+	],
+	[
+		'Oktalyzer',
+		new Map([
+			[1, '1'], [2, '2'], [112, '0'], [113, '0'], [114, '0'], [115, '6'],
+			[116, '5'], [156, '6'], [11, 'B'], [15, 'F'], [157, '5'], [12, 'C'],
+			[10, 'A'], [174, 'E'], [17, 'E'], [0, '0']
+		])
+	],
+	[
+		'STX',
+		new Map([
+			[15, 'A'], [11, 'B'], [13, 'C'], [10, 'D'], [2, 'E'], [1, 'F'],
+			[3, 'G'], [4, 'H'], [29, 'I'], [0, 'J']
+		])
+	],
+	[
+		'Funk',
+		new Map([
+			[121, 'A'], [120, 'B'], [122, 'C'], [123, 'D'], [124, 'G'], [125, 'H'],
+			[0, 'L'], [12, 'N'], [127, 'O'], [14, 'O'], [15, 'O']
+		])
+	],
+	[
+		'Protracker',
+		new Map([
+			[0, '0'], [1, '1'], [2, '2'], [3, '3'], [4, '4'], [5, '5'],
+			[6, '6'], [7, '7'], [8, '8'], [9, '9'], [10, 'A'], [11, 'B'],
+			[12, 'C'], [13, 'D'], [14, 'E'], [15, 'F'], [16, 'G'], [27, 'Q'],
+			[181, 'P'], [17, 'H'], [21, 'L'], [164, 'c'], [33, 'X'], [20, 'K'],
+			[25, 'P'], [29, 'T'], [146, '4'], [160, 'x'], [161, 'x'], [171, 'F']
+		])
+	],
+]);
+
+let lib = null, ctx = 0, audio = null, node = null, xmi = null;
+let playing = false, paused = false;
+let lastPattern = -1, lastPos = -1, lastRow = -1, lastSpeed = -1, lastBpm = -1;
+let volume = 100, stereo = 50;
+let efx_map = new Map();
+let meters = new Array();
+let active_meters = new Array();
+
+let filename = 'unknown';
+let mode = 'tracker';
+
+/* DOM Elements */
+const uiRoot = document.body.querySelector('.tracker');
+const uiHeader = uiRoot.querySelector(':scope > .header');
+const uiControls = uiHeader.querySelector(':scope > .holder > .controls');
+const buttonPlay = uiControls.querySelector(':scope button#play');
+const buttonPause = uiControls.querySelector(':scope button#pause');
+const buttonStop = uiControls.querySelector(':scope button#stop');
+const buttonDownload = uiControls.querySelector(':scope button#download');
+const titleBar = uiControls.querySelector(':scope input[name=title]');
+const curTimeText = uiControls.querySelector(':scope .curtime');
+const totalTimeText = uiControls.querySelector(':scope .totaltime');
+const speedText = uiControls.querySelector(':scope .speed');
+const bpmText = uiControls.querySelector(':scope .bpm');
+const typeText = uiControls.querySelector(':scope input[name=type]');
+const volumeBar = uiControls.querySelector(':scope input[name=volume]');
+const volumeText = uiControls.querySelector(':scope .vol-div .vol-text');
+const stereoBar = uiControls.querySelector(':scope input[name=stereo]');
+const stereoText = uiControls.querySelector(':scope .stsep-div .stsep-text');
+const uiOrder = uiHeader.querySelector(':scope > .order-box > .orders');
+const uiPatterns = uiRoot.querySelector(':scope > .patterns');
+const uiInstruments = uiControls.querySelector(':scope .instruments-div .instruments');
+const uiSamples = uiControls.querySelector(':scope .samples-div .samples');
+
+let uiCurrentPattern = null, uiCurrentRow = null;
+/* End DOM Elements */
+
+let headerHeight = 0, gapHeight = 0, rowHeight = 0;
+
+let orderCells = [];
+let patternTables = [];
+let patternMeters = [];
+let patternRows = [];
+let instrumentRows = [];
+let sampleRows = [];
+
+libxmp().then(m => {
+	lib = m;
+	if (!lib) throw new Error('libxmp module is null');
+
+	ctx = lib._xmp_create_context();
+	if (!ctx) throw new Error('Failed to create context');
+
+	console.log('libxmp ready, ctx:', ctx);
+	volumeBar.value = volume;
+	stereoBar.value = stereo;
+	['dragenter', 'dragover'].forEach(ev => {
+		document.body.addEventListener(ev, e => {
+			e.preventDefault();
+		});
+	});
+		
+	['dragleave', 'drop'].forEach(ev => {
+		document.body.addEventListener(ev, e => {
+			e.preventDefault();
+		});
+	});
+	
+	const params = new URLSearchParams(window.location.search);
+	let url = params.get('media');
+	if (url) {
+		loadFromUrl(url);
+	} else {
+		document.body.addEventListener('drop', e => {
+			const file = e.dataTransfer.files[0];
+			if (file) {
+				stop();
+				orderCells.forEach(e => e.remove());
+				patternTables.forEach(e => e.remove());
+				patternMeters.forEach(e => {e.forEach(f => {f.l.remove(); f.r.remove();})});
+				patternRows.forEach(e => e.forEach(f => f.remove()));
+				instrumentRows.forEach(e => e.remove());
+				sampleRows.forEach(e => e.remove());
+				orderCells = [];
+				patternTables = [];
+				patternMeters = [];
+				patternRows = [];
+				instrumentRows = [];
+				sampleRows = [];
+				meters = new Array();
+				active_meters = new Array();
+				filename = file.name;
+				const objectUrl = URL.createObjectURL(file);
+				file.arrayBuffer().then(buffer => loadModule(new Uint8Array(buffer)));
+			}
+		});
+	}
+});
+
+function dispatch(name, detail) {
+	window.dispatchEvent(new CustomEvent(name, { detail }));
+}
+
+function readString(ptr, maxLen = 0) {
+	if (!ptr) return null;
+	return maxLen ? lib.UTF8ToString(ptr, maxLen).replace(/\0.*$/, '') : lib.UTF8ToString(ptr);
+}
+
+function readEvent(ptr) {
+	if (!ptr) return null;
+	return {
+		note : lib.getValue(ptr + 0, 'i8'),
+		ins  : lib.getValue(ptr + 1, 'i8'),
+		vol  : lib.getValue(ptr + 2, 'i8'),
+		fxt  : lib.getValue(ptr + 3, 'i8'),
+		fxp  : lib.getValue(ptr + 4, 'i8'),
+		f2t  : lib.getValue(ptr + 5, 'i8'),
+		f2p  : lib.getValue(ptr + 6, 'i8'),
+		_flag: lib.getValue(ptr + 7, 'i8')
+	};
+}
+
+function readChannel(ptr) {
+	return {
+		pan : lib.getValue(ptr + 0, 'i32'),
+		vol : lib.getValue(ptr + 4, 'i32'),
+		flg : lib.getValue(ptr + 8, 'i32')
+	};
+}
+
+function readEnvelope(ptr) {
+	if (!ptr) return null;
+	const flg = lib.getValue(ptr + 0, 'i32');
+	const npt = lib.getValue(ptr + 4, 'i32');
+	const data = [];
+	for (let i = 0; i < npt * 2 && i < XMP_MAX_ENV_POINTS * 2; i++) {
+		data.push(lib.getValue(ptr + 28 + i * 2, 'i16'));
+	}
+	return {
+		flg,
+		npt,
+		scl : lib.getValue(ptr +  8, 'i32'),
+		sus : lib.getValue(ptr + 12, 'i32'),
+		sue : lib.getValue(ptr + 16, 'i32'),
+		lps : lib.getValue(ptr + 20, 'i32'),
+		lpe : lib.getValue(ptr + 24, 'i32'),
+		data
+	};
+}
+
+function readSubinstrument(ptr) {
+	if (!ptr) return null;
+	return {
+		vol : lib.getValue(ptr +  0, 'i32'),
+		gvl : lib.getValue(ptr +  4, 'i32'),
+		pan : lib.getValue(ptr +  8, 'i32'),
+		xpo : lib.getValue(ptr + 12, 'i32'),
+		fin : lib.getValue(ptr + 16, 'i32'),
+		vwf : lib.getValue(ptr + 20, 'i32'),
+		vde : lib.getValue(ptr + 24, 'i32'),
+		vra : lib.getValue(ptr + 28, 'i32'),
+		vsw : lib.getValue(ptr + 32, 'i32'),
+		rvv : lib.getValue(ptr + 36, 'i32'),
+		sid : lib.getValue(ptr + 40, 'i32'),
+		nna : lib.getValue(ptr + 44, 'i32'),
+		dct : lib.getValue(ptr + 48, 'i32'),
+		dca : lib.getValue(ptr + 52, 'i32'),
+		ifc : lib.getValue(ptr + 56, 'i32'),
+		ifr : lib.getValue(ptr + 60, 'i32')
+	};
+}
+
+function readInstrument(basePtr, index) {
+	const ptr = basePtr + index * 764;
+	const name = readString(ptr, 32);
+	const nsm  = lib.getValue(ptr + 36, 'i32');
+	const subPtr = lib.getValue(ptr + 752, 'i32');
+
+	const map = [];
+	for (let k = 0; k < XMP_MAX_KEYS; k++) {
+		const mptr = ptr + 512 + k * 2;
+		map.push({
+			ins : lib.getValue(mptr,	 'i8'),
+			xpo : lib.getValue(mptr + 1, 'i8')
+		});
+	}
+
+	const sub = [];
+	if (nsm > 0 && nsm <= 255 && subPtr) {
+		for (let s = 0; s < nsm; s++) {
+			sub.push(readSubinstrument(subPtr + s * 64));
+		}
+	}
+
+	return {
+		name,
+		vol : lib.getValue(ptr + 32, 'i32'),
+		nsm,
+		rls : lib.getValue(ptr + 40, 'i32'),
+		aei : readEnvelope(ptr + 44),
+		pei : readEnvelope(ptr + 200),
+		fei : readEnvelope(ptr + 356),
+		map,
+		sub
+	};
+}
+
+function readSample(basePtr, index) {
+	const ptr = basePtr + index * 52;
+	return {
+		name : readString(ptr, 32),
+		len  : lib.getValue(ptr + 32, 'i32'),
+		lps  : lib.getValue(ptr + 36, 'i32'),
+		lpe  : lib.getValue(ptr + 40, 'i32'),
+		flg  : lib.getValue(ptr + 44, 'i32'),
+		data : lib.getValue(ptr + 48, 'i32')
+	};
+}
+
+function readTrack(ptr) {
+	if (!ptr) return null;
+	const rows = lib.getValue(ptr + 0, 'i32');
+	const events = [];
+	const eventPtr = ptr + 4;
+	for (let r = 0; r < rows; r++) {
+		events.push(readEvent(eventPtr + r * 8));
+	}
+	return { rows, events };
+}
+
+function readPattern(ptr, chn) {
+	if (!ptr) return null;
+	const rows = lib.getValue(ptr + 0, 'i32');
+	const index = [];
+	for (let i = 0; i < chn; i++) {
+		index.push(lib.getValue(ptr + 4 + i * 4, 'i32'));
+	}
+	return { rows, index };
+}
+
+function get_module_info(context) {
+	if (!lib || !context) return null;
+
+	const infoSize = 36;
+	const infoPtr = lib._malloc(infoSize);
+	lib._xmp_get_module_info(context, infoPtr);
+
+	const md5 = [];
+	for (let i = 0; i < 16; i++) md5.push(lib.getValue(infoPtr + i, 'i8'));
+
+	const vol_base = lib.getValue(infoPtr + 16, 'i32');
+	const mod_ptr = lib.getValue(infoPtr + 20, 'i32');
+	const comment_ptr = lib.getValue(infoPtr + 24, 'i32');
+	const num_sequences = lib.getValue(infoPtr + 28, 'i32');
+	const seq_data_ptr = lib.getValue(infoPtr + 32, 'i32');
+
+	const comment = readString(comment_ptr);
+
+	const sequences = [];
+	if (seq_data_ptr && num_sequences > 0) {
+		for (let i = 0; i < num_sequences; i++) {
+			const s = seq_data_ptr + i * 8;
+			sequences.push({
+				start: lib.getValue(s, 'i32'),
+				length: lib.getValue(s + 4, 'i32')
+			});
+		}
+	}
+
+	let mod = null;
+	if (mod_ptr) {
+		const name = readString(mod_ptr, XMP_NAME_SIZE);
+		const type = readString(mod_ptr + XMP_NAME_SIZE, XMP_NAME_SIZE);
+
+		const base = mod_ptr + 2 * XMP_NAME_SIZE;
+		const pat = lib.getValue(base + 0, 'i32');
+		const trk = lib.getValue(base + 4, 'i32');
+		const chn = lib.getValue(base + 8, 'i32');
+		const ins = lib.getValue(base + 12, 'i32');
+		const smp = lib.getValue(base + 16, 'i32');
+		const spd = lib.getValue(base + 20, 'i32');
+		const bpm = lib.getValue(base + 24, 'i32');
+		const len = lib.getValue(base + 28, 'i32');
+		const rst = lib.getValue(base + 32, 'i32');
+		const gvl = lib.getValue(base + 36, 'i32');
+
+		const xxp = lib.getValue(base + 40, 'i32');
+		const xxt = lib.getValue(base + 44, 'i32');
+		const xxi = lib.getValue(base + 48, 'i32');
+		const xxs = lib.getValue(base + 52, 'i32');
+		const xxc = base + 56;
+		const xxo = base + 56 + 64 * 12;
+
+		const patterns = [];
+		if (xxp) {
+			for (let i = 0; i < pat; i++) {
+				const p = lib.getValue(xxp + i * 4, 'i32');
+				patterns.push(readPattern(p, chn));
+			}
+		}
+
+		const tracks = [];
+		if (xxt) {
+			for (let i = 0; i < trk; i++) {
+				const t = lib.getValue(xxt + i * 4, 'i32');
+				tracks.push(readTrack(t));
+			}
+		}
+
+		const instruments = [];
+		if (xxi && ins > 0) {
+			for (let i = 0; i < ins; i++) {
+				instruments.push(readInstrument(xxi, i));
+			}
+		}
+
+		const samples = [];
+		if (xxs && smp > 0) {
+			for (let i = 0; i < smp; i++) {
+				samples.push(readSample(xxs, i));
+			}
+		}
+
+		const channels = [];
+		for (let i = 0; i < chn; i++) {
+			channels.push(readChannel(xxc + i * 16));
+		}
+
+		const order = [];
+		for (let i = 0; i < XMP_MAX_MOD_LENGTH && i < len; i++) {
+			order.push(lib.getValue(xxo + i, 'i8') & 0xFF);
+		}
+
+		mod = {
+			name, type, pat, trk, chn, ins, smp, spd, bpm, len, rst, gvl,
+			order, channels, patterns, tracks, instruments, samples
+		};
+	}
+
+	lib._free(infoPtr);
+	return { md5, vol_base, mod, comment, num_sequences, sequences };
+}
+
+function get_frame_info(context) {
+	if (!lib || !context) return null;
+
+	const infoSize = 2048; // generous
+	const ptr = lib._malloc(infoSize);
+	lib._xmp_get_frame_info(context, ptr);
+
+	const info = {
+		pos: lib.getValue(ptr + 0, 'i32'),
+		pattern: lib.getValue(ptr + 4, 'i32'),
+		row: lib.getValue(ptr + 8, 'i32'),
+		num_rows: lib.getValue(ptr + 12, 'i32'),
+		frame: lib.getValue(ptr + 16, 'i32'),
+		speed: lib.getValue(ptr + 20, 'i32'),
+		bpm: lib.getValue(ptr + 24, 'i32'),
+		time: lib.getValue(ptr + 28, 'i32'),
+		total_time: lib.getValue(ptr + 32, 'i32'),
+		frame_time: lib.getValue(ptr + 36, 'i32'),
+		buffer: lib.getValue(ptr + 40, 'i32'),
+		buffer_size: lib.getValue(ptr + 44, 'i32'),
+		total_size: lib.getValue(ptr + 48, 'i32'),
+		volume: lib.getValue(ptr + 52, 'i32'),
+		loop_count: lib.getValue(ptr + 56, 'i32'),
+		virt_channels: lib.getValue(ptr + 60, 'i32'),
+		virt_used: lib.getValue(ptr + 64, 'i32'),
+		sequence: lib.getValue(ptr + 68, 'i32')
+	};
+
+	const chanInfoPtr = ptr + 72;
+	const chanSize = 24;
+	info.channel_info = [];
+
+	for (let i = 0; i < XMP_MAX_CHANNELS; i++) {
+		const c = chanInfoPtr + i * chanSize;
+		info.channel_info.push({
+			period:	 lib.getValue(c + 0,  'i32'),
+			position:   lib.getValue(c + 4,  'i32'),
+			pitchbend:  lib.getValue(c + 8,  'i16'),
+			note:	   lib.getValue(c + 10, 'i8'),
+			instrument: lib.getValue(c + 11, 'i8'),
+			sample:	 lib.getValue(c + 12, 'i8'),
+			volume:	 lib.getValue(c + 13, 'i8'),
+			pan:		lib.getValue(c + 14, 'i8'),
+			reserved:   lib.getValue(c + 15, 'i8'),
+			event:	  readEvent(c + 16)
+		});
+	}
+
+	lib._free(ptr);
+	return info;
+}
+
+async function loadFromUrl(url) {
+	const res = await fetch(url);
+	console.log(res);
+	if (!res.ok) throw new Error(`HTTP ${res.status}`);
+	filename = res.headers.get('content-disposition');
+	if (filename && (filename.indexOf('attachment') !== -1 || filename.indexOf('inline') !== -1)) {
+		var filenameRegex = /filename[^;=\n]*=((['"]).*?\2|[^;\n]*)/;
+		var matches = filenameRegex.exec(filename);
+		if (matches != null && matches[1]) { 
+			filename = matches[1].replace(/['"]/g, '');
+		}
+	} else {
+		filename = res.url.substring(res.url.lastIndexOf('/')+1)
+		if (filename.indexOf('?') !== -1) {
+			filename.substring(0, filename.lastIndexOf('?'));
+		}
+	}
+	const buf = await res.arrayBuffer();
+	loadModule(new Uint8Array(buf));
+}
+
+async function loadModule(u8buf) {
+	try {
+		console.log('Module size:', u8buf.byteLength, 'bytes');
+
+		const ptr = lib._malloc(u8buf.byteLength);
+		if (!ptr) throw new Error('Malloc failed for module');
+		lib.HEAPU8.set(u8buf, ptr);
+		console.log(u8buf);
+
+		const ret = lib._xmp_load_module_from_memory(ctx, ptr, u8buf.byteLength);
+		lib._free(ptr);
+		if (ret !== 0) throw new Error(`Load failed: ${ret}`);
+
+		const blob = new Blob([u8buf], { type: 'application/octet-stream' });
+		buttonDownload.onclick = () => {
+			const link = document.createElement('a');
+			link.href = window.URL.createObjectURL(blob);
+			link.download = filename;
+			link.click();
+		};
+		buttonDownload.disabled = false;
+
+		xmi = get_module_info(ctx);
+		efx_map = getEffectsMap();
+
+		for(let c = 0; c < xmi.mod.chn; c++)
+			active_meters.push({l:null,r:null});
+
+		Promise.resolve().then(() => {
+			titleBar.value = xmi.mod.name;
+			typeText.value = xmi.mod.type;
+			totalTimeText.textContent = (Math.floor(((xmi.sequences[0].length / 1000) / 60) % 60)).toString().padStart(2, '0') + ':' +
+										(Math.floor((xmi.sequences[0].length / 1000) % 60)).toString().padStart(2, '0');
+			if (mode == 'tracker') {
+				preloadOrder();
+
+				loadInstruments();
+				loadSamples();
+
+				// load first pattern
+				let p = xmi.mod.order[0];
+				uiNewPattern = createPatternTable(p);
+				patternTables[p] = uiNewPattern;
+				uiPatterns.appendChild(uiNewPattern);
+			}
+			console.log('Module loaded successfully');
+			document.getElementById('play').disabled = false;
+			dispatch('moduleReady');
+		});
+	} catch (err) {
+		console.error('Load error:', err);
+		alert('An error occured attempting to load the module.');
+	}
+}
+
+function getEffectsMap() {
+	const type = xmi.mod.type;
+	console.log(type);
+
+	for (const entry of EFFECTS_MAP.entries()) {
+		if (type.includes(entry[0])) {
+			return entry[1];
+		}
+	}
+	return EFFECTS_MAP.get('Protracker');
+}
+
+async function preloadOrder() {
+	for (let o = 0; o < xmi.mod.len; o++) {
+		let index = xmi.mod.order[o];
+		if (index == 0xFF) continue;
+		const indexBox = document.createElement('div');
+		indexBox.textContent = toHex(index);
+		indexBox.width = indexBox.height = '24px';
+		uiOrder.appendChild(indexBox);
+		orderCells.push(indexBox);
+	}
+}
+
+function loadInstruments() {
+	for (let i = 0; i < xmi.mod.ins; i++) {
+		const row = uiInstruments.insertRow();
+
+		const index = row.insertCell();
+		index.width = 16;
+		index.textContent = toHex(i);
+
+		const name = row.insertCell();
+		name.textContent = xmi.mod.instruments[i].name;
+
+		instrumentRows.push(row);
+	}
+}
+
+function loadSamples() {
+	for (let s = 0; s < xmi.mod.smp; s++) {
+		const row = uiSamples.insertRow();
+
+		const index = row.insertCell();
+		index.width = 16;
+		index.textContent = toHex(s);
+
+		const name = row.insertCell();
+		name.textContent = xmi.mod.samples[s].name;
+
+		sampleRows.push(row);
+	}
+}
+
+function createPatternTable(p) {
+	const chn = xmi.mod.chn;
+	const pattern = xmi.mod.patterns[p];
+	if (!pattern) return null;
+
+	let html = `<table class="pattern" id="p${p}">`;
+
+	// Header
+	html += '<tr><th></th>';
+	for (let c = 0; c < chn; c++) {
+		html += `<th class="channel">Channel ${c+1}<div class="visualizer"><meter class="left" max="64"></meter><meter class="right" max="64"></meter></div></th>`;
+	}
+	html += '</tr>';
+
+	// Top gap
+	html += '<tr class="gap"><td></td>';
+	for (let c = 0; c < chn; c++) html += '<td></td>';
+	html += '</tr>';
+
+	// Rows
+	for (let r = 0; r < pattern.rows; r++) {
+		html += `<tr id="r${r}"><td id="no">${toHex(r)}</td>`;
+		for (let c = 0; c < chn; c++) {
+			const track = pattern.index[c];
+			const event = xmi.mod.tracks[track].events[r];
+
+			let noteText = '...';
+			if (event.note < 0) noteText = '===';
+			else if (event.note > 0) noteText = NOTES[event.note % 12] + Math.floor(event.note / 12);
+
+			let insText = event.ins > 0 ? toHex(event.ins) : '..';
+
+			let volText = '..';
+			if (event.vol != 0) volText = toHex(event.vol - 1);
+			else if (event.note > 0) volText = '40';
+
+			const fxp = event.fxp & 0xFF;
+			let efxType = '.';
+			let efxParam = '..';
+			if (efx_map.has(event.fxt) && fxp != 0) {
+				efxType = efx_map.get(event.fxt);
+				efxParam = toHex(fxp);
+			}
+
+			html += `<td><a class="note">${noteText}</a> <a class="instrument">${insText}</a> <a class="volume">${volText}</a> `+
+					`<a class="effect_type">${efxType}</a><a class="effect_param">${efxParam}</a></td>`;
+		}
+		html += '</tr>';
+	}
+
+	// Bottom gap
+	html += '<tr class="gap"><td></td>';
+	for (let c = 0; c < chn; c++) html += '<td></td>';
+	html += '</tr></table>';
+
+	const container = document.createElement('div'); // Temporary container to parse HTML
+	container.innerHTML = html;
+	const patternTable = container.firstChild;
+
+	// Extract meters
+	patternMeters[p] = [];
+	const headerRow = patternTable.rows[0];
+	for (let c = 0; c < chn; c++) {
+		const vis = headerRow.cells[c + 1].querySelector('.visualizer');
+		patternMeters[p][c] = {
+			l: vis.querySelector('.left'),
+			r: vis.querySelector('.right')
+		};
+	}
+
+	// Extract rows
+	patternRows[p] = [];
+	for (let r = 0; r < pattern.rows; r++) {
+		patternRows[p][r] = patternTable.rows[r + 2];
+	}
+
+	return patternTable;
+}
+
+async function play() {
+	if (playing && !paused) return;
+	let initalized = (audio != null && node != null);
+
+	if (!initalized) {
+		console.log('Starting playback...');
+		audio = new (window.AudioContext || window.webkitAudioContext)({ sampleRate: SR });
+		var soundBuffer = lib._malloc(BYTES+1);
+		await audio.resume();
+		console.log('AudioContext ready');
+
+		node = audio.createScriptProcessor(BUF, 0, 2);
+		console.log('ScriptProcessorNode created');
+
+		node.onaudioprocess = (e) => {
+			const leftChannel = e.outputBuffer.getChannelData(0);
+			const rightChannel = e.outputBuffer.getChannelData(1);
+
+			if (!paused && lib._xmp_play_buffer(ctx, soundBuffer, BYTES, 0) == 0) {
+				const heap = lib.HEAP16;
+				const base = soundBuffer >> 1;
+				for (let i = 0; i < BUF; i++) {
+					leftChannel[i] = heap[base + i*2] / 32768;
+					rightChannel[i] = heap[base + i*2 + 1] / 32768;
+				}
+
+				const xfi = get_frame_info(ctx);
+				if (xfi) {
+					if (xfi.pos !== lastPos) {
+						dispatch('patternChanged', {xfi});
+						lastPattern = xfi.pattern;
+						lastPos = xfi.pos;
+						lastRow = -1;
+					}
+					if (xfi.row !== lastRow) {
+						dispatch('rowChanged', {xfi});
+						lastRow = xfi.row;
+					}
+					if (xfi.speed !== lastSpeed) {
+						dispatch('speedChanged', {xfi});
+						lastSpeed = xfi.speed;
+					}
+					if (xfi.bpm !== lastBpm) {
+						dispatch('bpmChanged', {xfi});
+						lastBpm = xfi.bpm;
+					}
+
+					// set time
+					curTimeText.textContent = (Math.floor(((xfi.time / 1000) / 60) % 60)).toString().padStart(2, '0') + ':' +
+											(Math.floor((xfi.time / 1000) % 60)).toString().padStart(2, '0');
+
+					for (var c = 0; c < xmi.mod.chn; c++) {
+						const chan = xfi.channel_info[c];
+						const chanVol = chan.volume & 0xFF;
+						const chanPan = chan.pan & 0xFF;
+						const leftVol = Math.floor(chanVol * (256 - chanPan) / 256);
+						const rightVol = Math.floor(chanVol * chanPan / 256);
+
+						if (active_meters[c].l) active_meters[c].l.value = leftVol;
+						if (active_meters[c].r) active_meters[c].r.value = rightVol;
+					}
+				}
+			}
+		};
+
+		node.connect(audio.destination);
+		lib._xmp_start_player(ctx, SR, 0);
+		lib._xmp_set_player(ctx, 7, volume);
+		lib._xmp_set_player(ctx, 1, stereo);
+	}
+
+	paused = false;
+	playing = true;
+	buttonPlay.disabled = true;
+	buttonPause.disabled = buttonStop.disabled = false;
+	console.log('Playback started');
+}
+
+function pause() {
+	paused = true;
+	buttonPlay.disabled = false;
+	buttonPause.disabled = buttonStop.disabled = true;
+}
+
+function stop() {
+	if (!playing) return;
+	console.log('Stopping playback');
+	lib._xmp_end_player(ctx);
+	if (node) node.disconnect();
+	audio = null;
+	node = null;
+	playing = false;
+	lastPattern = lastRow = lastPos = -1;
+	buttonPlay.disabled = buttonPause.disabled = false;
+	buttonStop.disabled = true;
+}
+
+function changeVolume() {
+	volumeText.textContent = volumeBar.value+'%';
+	volume = volumeBar.value;
+	lib._xmp_set_player(ctx, 7, volume);
+}
+
+function changeStereoSeparation() {
+	stereoText.textContent = stereoBar.value+'%';
+	stereo = stereoBar.value;
+	lib._xmp_set_player(ctx, 1, stereo);
+}
+
+buttonPlay.onclick = play;
+buttonPause.onclick = pause;
+buttonStop.onclick = stop;
+volumeBar.oninput = changeVolume;
+stereoBar.oninput = changeStereoSeparation;
+
+window.addEventListener('beforeunload', () => {
+	if (ctx) lib._xmp_free_context(ctx);
+});
+
+window.addEventListener('patternChanged', e => {
+	if (mode != 'tracker') return;
+	const xfi = e.detail.xfi;
+
+	if (lastPos >= 0) orderCells[lastPos].classList.remove('active');
+	orderCells[xfi.pos].className = 'active';
+	orderCells[xfi.pos].scrollIntoView();
+
+	if (xfi.pattern == lastPattern) return;
+	const p = xfi.pattern;
+
+	if (uiCurrentPattern != null) {
+		uiCurrentPattern.style.display = 'none';
+	}
+
+	let uiNewPattern = patternTables[p];
+	if (uiNewPattern == null) {
+		uiNewPattern = createPatternTable(p);
+		patternTables[p] = uiNewPattern;
+		uiPatterns.appendChild(uiNewPattern);
+	}
+
+	uiNewPattern.style.display = '';
+	uiCurrentPattern = uiNewPattern;
+
+	if (rowHeight === 0) {
+		headerHeight = uiNewPattern.rows[0].clientHeight;
+		gapHeight = uiNewPattern.rows[1].clientHeight;
+		rowHeight = uiNewPattern.rows[2].clientHeight;
+	}
+
+	for (let c = 0; c < xmi.mod.chn; c++) {
+		active_meters[c] = patternMeters[p][c];
+	}
+});
+
+window.addEventListener('rowChanged', e => {
+	if (mode != 'tracker') return;
+	const xfi = e.detail.xfi;
+
+	if (uiCurrentRow != null) uiCurrentRow.classList.remove('playhead');
+
+	const patternIndex = lastPattern;
+	let uiNewRow = patternRows[patternIndex] ? patternRows[patternIndex][xfi.row] : null;
+	if (uiNewRow != null) {
+		uiNewRow.classList.add('playhead');
+		uiCurrentRow = uiNewRow;
+
+		if (rowHeight > 0) {
+			const container = uiPatterns;
+			const rowPosition = headerHeight + gapHeight + xfi.row * rowHeight;
+			const targetScroll = rowPosition + rowHeight / 2 - container.clientHeight / 2;
+			container.scrollTop = Math.max(0, targetScroll);
+		}
+	}
+});
+
+window.addEventListener('speedChanged', e => {
+	speedText.textContent = e.detail.xfi.speed;
+});
+
+window.addEventListener('bpmChanged', e => {
+	bpmText.textContent = e.detail.xfi.bpm;
+});
+
+HTMLTableRowElement.prototype.insertHeadCell = function() {
+	var head = document.createElement('th');
+	this.append(head);
+	return head;
+};
+
+function toHex(s) {
+	return s.toString(16).toUpperCase().padStart(2, '0');
+};
--- a/screenshot.png
+++ b/screenshot.png
--- a/stereo.png
+++ b/stereo.png
--- a/volume.png
+++ b/volume.png