style: stereo channel test on main audio page

.earthlyignore

@@ -0,0 +1,2 @@
+*/node_modules
+Earthfile

.gitattributes

@@ -0,0 +1 @@
+**/*.wav filter=lfs diff=lfs merge=lfs -text

.gitignore

@@ -1,3 +1,6 @@
+assets/generated/*
+!assets/generated/.gitkeep
+
 .DS_Store
 node_modules
 /build

Earthfile

@@ -5,9 +5,10 @@ site:
     RUN npm install -g pnpm
     COPY package.json pnpm-lock.yaml /site
     WORKDIR /site
-    CACHE $HOME/.local/share/pnpm
+    CACHE --id=pnpm $HOME/.local/share/pnpm
-    RUN pnpm install --frozen-lockfile
+    RUN pnpm install --frozen-lockfile --prod
     COPY . /site
+    COPY +assets-generated/ /site/assets/generated
     RUN pnpm build
     SAVE ARTIFACT build AS LOCAL build
 
@@ -23,3 +24,88 @@ deploy:
     COPY +site/build /build
     RUN --secret SSH_TARGET --push rsync -cvrz --delete /build/ $SSH_TARGET
 
+
+avsync-video-components:
+    # https://pptr.dev/troubleshooting
+    RUN apt-get update && apt-get -y install libgtk-3-dev libnotify-dev libgconf-2-4 libnss3 libxss1 libasound2 && rm -rf /var/lib/apt/lists/*
+    RUN npm install -g pnpm
+    RUN groupadd -r pptruser && useradd -r -g pptruser -G audio,video pptruser && mkdir /home/pptruser && chown -R pptruser:pptruser /home/pptruser
+    USER pptruser
+    COPY package.json pnpm-lock.yaml /site
+    WORKDIR /site
+    CACHE --id=pnpm /home/pptruser/.local/share/pnpm
+    RUN pnpm install --frozen-lockfile
+    COPY av-sync av-sync
+    ARG FPS=60
+    ARG CYCLES=16
+    ARG SIZE=1200
+    RUN pnpm av:render:video --fps $FPS --cycles 1 --size $SIZE --output /var/tmp/frames
+    SAVE ARTIFACT /var/tmp/frames
+    RUN pnpm av:render:audio -i beep.wav -o /var/tmp/track.wav --repeats $CYCLES
+    SAVE ARTIFACT /var/tmp/track.wav
+
+aux-media:
+    FROM debian:bookworm
+    RUN apt-get update && apt-get install -y ffmpeg sox && rm -rf /var/lib/apt/lists/*
+
+avsync-video:
+    FROM +aux-media
+    RUN apt-get update && apt-get install -y ffmpeg sox && rm -rf /var/lib/apt/lists/*
+    COPY +avsync-video-components/track.wav /track.wav
+    COPY +avsync-video-components/frames /frames
+    RUN find frames -type f | sort | xargs -I {} sh -c 'echo "file {}" >> /frames.txt'
+    ARG CYCLES=16
+    RUN for i in $(seq 1 $CYCLES); do cat /frames.txt >> /final-frames.txt; done
+    ARG FPS=60
+    RUN ffmpeg -r $FPS -f concat -i /final-frames.txt -i track.wav -c:v libvpx-vp9 -pix_fmt yuva420p -shortest avsync.webm
+    SAVE ARTIFACT avsync.webm
+
+audio-channel-tracks:
+    FROM +aux-media
+    RUN mkdir -p /input /output
+    COPY assets/audio/channels /raw
+    WORKDIR /raw
+    RUN for file in *.wav; do sox $file /input/$file silence 1 0.1 0.1% reverse silence 1 0.1 0.1% reverse; done
+    WORKDIR /input
+    RUN mkdir -p /output/wav/stereo /output/wav/5.1 /output/wav/7.1
+    RUN ffmpeg -i Left.wav -af "pan=stereo|FL=c0" /output/wav/stereo/Left.wav -hide_banner -loglevel error && \
+        ffmpeg -i Right.wav -af "pan=stereo|FR=c0" /output/wav/stereo/Right.wav -hide_banner -loglevel error && \
+        ffmpeg -i Center.wav -af "pan=stereo|FL=c0|FR=c0" /output/wav/stereo/Center.wav -hide_banner -loglevel error && \
+        # 5.1
+        ffmpeg -i Front_Left.wav -af "pan=5.1|FL=c0" /output/wav/5.1/Front_Left.wav -hide_banner -loglevel error && \
+        ffmpeg -i Front_Right.wav -af "pan=5.1|FR=c0" /output/wav/5.1/Front_Right.wav -hide_banner -loglevel error && \
+        ffmpeg -i Front_Center.wav -af "pan=5.1|FC=c0" /output/wav/5.1/Front_Center.wav -hide_banner -loglevel error && \
+        ffmpeg -i Noise.wav -af "pan=5.1|LFE=c0" /output/wav/5.1/LFE_Noise.wav -hide_banner -loglevel error && \
+        ffmpeg -i Rear_Left.wav -af "pan=5.1|BL=c0" /output/wav/5.1/Rear_Left.wav -hide_banner -loglevel error && \
+        ffmpeg -i Rear_Right.wav -af "pan=5.1|BR=c0" /output/wav/5.1/Rear_Right.wav -hide_banner -loglevel error && \
+        # 7.1
+        ffmpeg -i Front_Left.wav -af "pan=7.1|FL=c0" /output/wav/7.1/Front_Left.wav -hide_banner -loglevel error && \
+        ffmpeg -i Front_Right.wav -af "pan=7.1|FR=c0" /output/wav/7.1/Front_Right.wav -hide_banner -loglevel error && \
+        ffmpeg -i Front_Center.wav -af "pan=7.1|FC=c0" /output/wav/7.1/Front_Center.wav -hide_banner -loglevel error && \
+        ffmpeg -i Noise.wav -af "pan=7.1|LFE=c0" /output/wav/7.1/LFE_Noise.wav -hide_banner -loglevel error && \
+        ffmpeg -i Side_Left.wav -af "pan=7.1|SL=c0" /output/wav/7.1/Side_Left.wav -hide_banner -loglevel error && \
+        ffmpeg -i Side_Right.wav -af "pan=7.1|SR=c0" /output/wav/7.1/Side_Right.wav -hide_banner -loglevel error && \
+        ffmpeg -i Rear_Left.wav -af "pan=7.1|BL=c0" /output/wav/7.1/Rear_Left.wav -hide_banner -loglevel error && \
+        ffmpeg -i Rear_Right.wav -af "pan=7.1|BR=c0" /output/wav/7.1/Rear_Right.wav -hide_banner -loglevel error
+    SAVE ARTIFACT /output/wav/
+
+audio-channel-tracks-ogg:
+    FROM +audio-channel-tracks
+    RUN mkdir -p /output/ogg/stereo /output/ogg/5.1 /output/ogg/7.1
+    RUN for file in /output/wav/stereo/*.wav; do ffmpeg -i $file -c:a libvorbis /output/ogg/stereo/$(basename $file .wav).ogg -hide_banner -loglevel error; done && \
+        for file in /output/wav/5.1/*.wav; do ffmpeg -i $file -c:a libvorbis /output/ogg/5.1/$(basename $file .wav).ogg -hide_banner -loglevel error; done && \
+        for file in /output/wav/7.1/*.wav; do ffmpeg -i $file -c:a libvorbis /output/ogg/7.1/$(basename $file .wav).ogg -hide_banner -loglevel error; done
+    SAVE ARTIFACT /output/ogg
+
+audio-channel-tracks-mp3:
+    FROM +audio-channel-tracks
+    RUN mkdir -p /output/mp3/stereo /output/mp3/5.1 /output/mp3/7.1
+    RUN for file in /output/wav/stereo/*.wav; do ffmpeg -i $file -c:a libmp3lame /output/mp3/stereo/$(basename $file .wav).mp3 -hide_banner -loglevel error; done && \
+        for file in /output/wav/5.1/*.wav; do ffmpeg -i $file -c:a libmp3lame /output/mp3/5.1/$(basename $file .wav).mp3 -hide_banner -loglevel error; done && \
+        for file in /output/wav/7.1/*.wav; do ffmpeg -i $file -c:a libmp3lame /output/mp3/7.1/$(basename $file .wav).mp3 -hide_banner -loglevel error; done
+    SAVE ARTIFACT /output/mp3
+
+assets-generated:
+    COPY +avsync-video/avsync.webm /assets/avsync.webm
+    COPY +audio-channel-tracks-mp3/mp3 /assets/audio/
+    SAVE ARTIFACT /assets/* AS LOCAL assets/generated/

av-sync/.gitignore

@@ -0,0 +1,24 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?

av-sync/index.html

@@ -0,0 +1,11 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <title>AV SYNC</title>
+  </head>
+  <body>
+    <div id="app"></div>
+    <script type="module" src="/src/main.ts"></script>
+  </body>
+</html>

av-sync/public/vite.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" class="iconify iconify--logos" width="31.88" height="32" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 257"><defs><linearGradient id="IconifyId1813088fe1fbc01fb466" x1="-.828%" x2="57.636%" y1="7.652%" y2="78.411%"><stop offset="0%" stop-color="#41D1FF"></stop><stop offset="100%" stop-color="#BD34FE"></stop></linearGradient><linearGradient id="IconifyId1813088fe1fbc01fb467" x1="43.376%" x2="50.316%" y1="2.242%" y2="89.03%"><stop offset="0%" stop-color="#FFEA83"></stop><stop offset="8.333%" stop-color="#FFDD35"></stop><stop offset="100%" stop-color="#FFA800"></stop></linearGradient></defs><path fill="url(#IconifyId1813088fe1fbc01fb466)" d="M255.153 37.938L134.897 252.976c-2.483 4.44-8.862 4.466-11.382.048L.875 37.958c-2.746-4.814 1.371-10.646 6.827-9.67l120.385 21.517a6.537 6.537 0 0 0 2.322-.004l117.867-21.483c5.438-.991 9.574 4.796 6.877 9.62Z"></path><path fill="url(#IconifyId1813088fe1fbc01fb467)" d="M185.432.063L96.44 17.501a3.268 3.268 0 0 0-2.634 3.014l-5.474 92.456a3.268 3.268 0 0 0 3.997 3.378l24.777-5.718c2.318-.535 4.413 1.507 3.936 3.838l-7.361 36.047c-.495 2.426 1.782 4.5 4.151 3.78l15.304-4.649c2.372-.72 4.652 1.36 4.15 3.788l-11.698 56.621c-.732 3.542 3.979 5.473 5.943 2.437l1.313-2.028l72.516-144.72c1.215-2.423-.88-5.186-3.54-4.672l-25.505 4.922c-2.396.462-4.435-1.77-3.759-4.114l16.646-57.705c.677-2.35-1.37-4.583-3.769-4.113Z"></path></svg>

av-sync/render-audio.js

@@ -0,0 +1,36 @@
+import { Command } from 'commander';
+import wav from 'node-wav';
+import fs from 'fs';
+
+const program = new Command();
+program
+	.requiredOption('-i, --input <input>', 'Input file')
+	.requiredOption('-o, --output <output>', 'Output file')
+	.requiredOption('--repeats <repeats>', 'Number of repeats')
+	.parse(process.argv);
+const options = program.opts();
+
+let beep = wav.decode(fs.readFileSync(options.input));
+let samples = beep.channelData[0];
+
+const sampleRate = beep.sampleRate;
+const silenceDuration = sampleRate - samples.length;
+const silenceSamples = new Float32Array(silenceDuration).fill(0);
+
+let oneSecondChunk = new Float32Array(sampleRate);
+oneSecondChunk.set(samples, 0);
+oneSecondChunk.set(silenceSamples, samples.length);
+
+let numberOfRepeats = parseInt(options.repeats);
+let finalSamples = new Float32Array(sampleRate * numberOfRepeats);
+
+for (let i = 0; i < numberOfRepeats; i++) {
+	finalSamples.set(oneSecondChunk, i * sampleRate);
+}
+
+let halfSecondSilence = new Float32Array(sampleRate / 2).fill(0);
+finalSamples = Float32Array.from([...halfSecondSilence, ...finalSamples]);
+
+let finalBuffer = wav.encode([finalSamples], { sampleRate: sampleRate, float: true, bitDepth: 32 });
+
+fs.writeFileSync(options.output, finalBuffer);

av-sync/render-video.js

@@ -0,0 +1,51 @@
+import { Command } from 'commander';
+import puppeteer from 'puppeteer';
+import fs from 'fs';
+
+const program = new Command();
+program
+	.requiredOption('-o, --output <output>', 'Output directory')
+	.requiredOption('--fps <fps>', 'Frames per second')
+	.requiredOption('--cycles <cycles>', 'Number of cycles')
+	.requiredOption('--size <size>', 'Size of the output in pixels')
+	.requiredOption('--url <url>', 'URL to render')
+	.parse(process.argv);
+const options = program.opts();
+
+// mkdir p output path
+if (!fs.existsSync(options.output)) {
+	fs.mkdirSync(options.output, { recursive: true });
+}
+
+const browser = await puppeteer.launch({
+	args: ['--no-sandbox']
+});
+const page = await browser.newPage();
+
+await page.setViewport({ width: parseInt(options.size, 10), height: parseInt(options.size, 10) });
+await page.goto(options.url);
+
+await page.evaluate(async (fps) => {
+	// @ts-ignore
+	await window.setFps(fps);
+}, options.fps);
+
+const totalFrames = parseInt(options.fps) * parseInt(options.cycles);
+const half = Math.floor(parseInt(options.fps) / 2);
+for (let frame = 0; frame < totalFrames; frame++) {
+	let start = Date.now();
+	await page.evaluate(async (n) => {
+		// @ts-ignore
+		await window.setFrame(n);
+	}, frame + half);
+	const path = `${options.output}/${frame.toString().padStart(Math.log10(totalFrames) + 1, '0')}.png`;
+	await page.screenshot({ path, omitBackground: true });
+	let end = Date.now();
+	console.log(
+		`Captured frame ${frame + half}: ${frame + 1}/${totalFrames} (took ${end - start}ms)`
+	);
+}
+
+console.log('Done.');
+
+await browser.close();

av-sync/src/App.svelte

@@ -0,0 +1,119 @@
+<script lang="ts">
+	import '@fontsource/b612';
+	import '@fontsource/b612/700.css';
+	import 'normalize.css/normalize.css';
+
+	import { onMount, tick } from 'svelte';
+	import SectorIndicator from './components/SectorIndicator.svelte';
+	import FlashIndicator from './components/FlashIndicator.svelte';
+	import Scale from './components/Scale.svelte';
+
+	export let frame = 0;
+	export let fps = 60;
+	export let debug = false;
+
+	onMount(() => {
+		window.setFps = async (newFps: number) => {
+			fps = newFps;
+			await tick();
+		};
+
+		window.setFrame = async (frameNumber: number) => {
+			frame = frameNumber;
+			await tick();
+		};
+
+		if (window.location.search.includes('debug')) {
+			debug = true;
+		}
+
+		if (window.location.search.includes('play')) {
+			setInterval(() => {
+				frame++;
+				frame %= fps * 4;
+			}, 1000 / fps);
+		}
+
+		if (window.location.search.includes('frame')) {
+			const frameNumber = parseInt(window.location.search.split('frame=')[1]);
+			if (!isNaN(frameNumber)) {
+				frame = frameNumber;
+			}
+		}
+	});
+</script>
+
+<main class:debug>
+	<div class="cyclic">
+		<div class="circular sector">
+			<SectorIndicator {frame} {fps} />
+		</div>
+
+		<div class="circular flash">
+			<FlashIndicator {frame} {fps} />
+		</div>
+	</div>
+
+	<div class="scale">
+		<Scale {frame} {fps} />
+	</div>
+
+	{#if debug}
+		<div class="controls">
+			<input type="range" min="0" max={fps * 4} bind:value={frame} />
+			<div class="label">{frame} ({frame % fps}) / {Math.round((frame / fps) * 100) / 100} s)</div>
+		</div>
+	{/if}
+</main>
+
+<style>
+	main {
+		width: 100vw;
+		height: 100vh;
+
+		color: white;
+		--color-active: red;
+		--color-inactive: white;
+
+		display: flex;
+		flex-direction: column;
+		justify-content: space-evenly;
+		align-items: center;
+
+		font-family: 'B612', 'IBM Plex Sans', 'Helvetica Neue', Arial, sans-serif;
+	}
+
+	.circular {
+		width: 25vw;
+		height: 25vw;
+	}
+
+	.cyclic {
+		width: 100vw;
+
+		display: flex;
+		justify-content: space-evenly;
+	}
+
+	.scale {
+		width: 80vw;
+	}
+
+	main.debug {
+		background: black;
+	}
+
+	.controls {
+		position: fixed;
+		bottom: 0;
+		left: 50%;
+		transform: translateX(-50%);
+		width: 80vw;
+
+		text-align: center;
+
+		& input {
+			width: 100%;
+		}
+	}
+</style>

av-sync/src/app.css

@@ -0,0 +1,3 @@
+html, body {
+  margin: 0;
+}

av-sync/src/components/FlashIndicator.svelte

@@ -0,0 +1,33 @@
+<script lang="ts">
+	export let frame: number;
+	export let fps: number;
+
+	let el: SVGSVGElement;
+	$: center = el?.clientWidth / 2;
+	$: radius = center;
+
+	let opacity = 1;
+	$: opacity = ease(1 - ((frame % fps) / fps) * 2);
+
+	function ease(x: number) {
+		x = Math.max(0, Math.min(1, x));
+		return 1 - Math.cos((x * Math.PI) / 2);
+	}
+</script>
+
+<svg class="indicator" bind:this={el} style="--opacity: {opacity}">
+	<circle cx={center} cy={center} r={radius}></circle>
+</svg>
+
+<style>
+	.indicator {
+		width: 100%;
+		height: 100%;
+		transform: rotate(-90deg);
+	}
+
+	circle {
+		fill: var(--color-active);
+		opacity: var(--opacity);
+	}
+</style>

av-sync/src/components/Scale.svelte

@@ -0,0 +1,113 @@
+<script lang="ts">
+	export let frame: number;
+	export let fps: number;
+</script>
+
+<div class="scale" style="--frame: {frame}; --fps: {fps}">
+	<div class="labels">
+		<div>Video Late</div>
+		<div>Audio Late</div>
+	</div>
+	<div class="zero">
+		<div class="label">0</div>
+		<div class="mark"></div>
+	</div>
+	<div class="indicator"></div>
+	<div class="ticks">
+		<div class="tick"></div>
+		{#each Array.from({ length: fps }, (_, i) => i) as i}
+			<div class="spacer" class:active={i === (frame + fps / 2) % fps}>
+				{#if i % (fps / 10) === 0 && i !== 0 && i !== fps / 2}
+					<div class="label">{(i - fps / 2) * (1000 / fps)}ms</div>
+				{/if}
+			</div>
+			<div class="tick"></div>
+		{/each}
+	</div>
+	<div class="axis"></div>
+</div>
+
+<style>
+	.scale {
+		position: relative;
+	}
+
+	.labels {
+		position: absolute;
+		top: -3vw;
+		width: 100%;
+		display: flex;
+		font-size: 2vw;
+	}
+
+	.labels > div {
+		flex-grow: 1;
+		text-align: center;
+	}
+
+	.axis {
+		position: absolute;
+		top: 50%;
+		left: 0;
+		transform: translateY(-50%);
+
+		width: 100%;
+		background: white;
+		height: 2px;
+	}
+
+	.ticks {
+		display: flex;
+		flex-wrap: wrap;
+		width: 100%;
+
+		& .spacer {
+			position: relative;
+			flex-grow: 1;
+
+			&.active {
+				background: var(--color-active);
+				z-index: 9;
+			}
+
+			& .label {
+				position: absolute;
+				top: calc(100% + 2em);
+				left: 50%;
+				transform: translateX(-50%) rotate(90deg);
+
+				line-height: 1;
+				font-size: 13px;
+			}
+		}
+
+		& .tick {
+			width: 2px;
+			height: 5vh;
+			background: white;
+		}
+	}
+
+	.zero {
+		position: absolute;
+		top: calc(50% - 5vh * 2.5 / 2);
+		left: calc(50%);
+		width: calc(100% / var(--fps) - 1px);
+		font-size: 2vw;
+
+		& .label {
+			position: absolute;
+			top: -1.2em;
+			color: transparent;
+		}
+
+		& .mark {
+			width: 2px;
+			height: calc(5vh * 2.5);
+			background: white;
+			position: absolute;
+			top: 0;
+			left: 50%;
+		}
+	}
+</style>

av-sync/src/components/SectorIndicator.svelte

@@ -0,0 +1,43 @@
+<script lang="ts">
+	export let frame: number;
+	export let fps: number;
+
+	let el: SVGSVGElement;
+	$: center = el?.clientWidth / 2;
+	$: radius = center;
+	let d = '';
+	let circleOpacity = 1;
+
+	$: {
+		const angle = ((frame / fps) * 360) % 360;
+		const radians = (angle * Math.PI) / 180;
+		const x = center + radius * Math.cos(radians);
+		const y = center + radius * Math.sin(radians);
+		d = `M${center},${center} L${center + radius},${center} A${radius},${radius} 0 ${angle > 180 ? 1 : 0} 1 ${x},${y} Z`;
+
+		const flashFrames = fps / 10;
+		circleOpacity = (flashFrames - (frame % fps)) / flashFrames;
+	}
+</script>
+
+<svg class="indicator" style="--circle-opacity: {circleOpacity}" bind:this={el}>
+	<circle cx={center} cy={center} r={radius}></circle>
+	<path {d}></path>
+</svg>
+
+<style>
+	.indicator {
+		width: 100%;
+		height: 100%;
+		transform: rotate(-90deg);
+	}
+
+	circle {
+		fill: var(--color-active);
+		opacity: var(--circle-opacity);
+	}
+
+	path {
+		fill: var(--color-inactive);
+	}
+</style>

av-sync/src/main.ts

@@ -0,0 +1,8 @@
+import './app.css';
+import App from './App.svelte';
+
+const app = new App({
+	target: document.getElementById('app')!
+});
+
+export default app;

av-sync/src/vite-env.d.ts

@@ -0,0 +1,11 @@
+/// <reference types="svelte" />
+/// <reference types="vite/client" />
+
+declare global {
+	interface Window {
+		setFps: (fps: number) => Promise<void>;
+		setFrame: (frame: number) => Promise<void>;
+	}
+}
+
+export {};

av-sync/svelte.config.js

@@ -0,0 +1,7 @@
+import { vitePreprocess } from '@sveltejs/vite-plugin-svelte'
+
+export default {
+  // Consult https://svelte.dev/docs#compile-time-svelte-preprocess
+  // for more information about preprocessors
+  preprocess: vitePreprocess(),
+}

av-sync/tsconfig.json

@@ -0,0 +1,20 @@
+{
+  "extends": "@tsconfig/svelte/tsconfig.json",
+  "compilerOptions": {
+    "target": "ESNext",
+    "useDefineForClassFields": true,
+    "module": "ESNext",
+    "resolveJsonModule": true,
+    /**
+     * Typecheck JS in `.svelte` and `.js` files by default.
+     * Disable checkJs if you'd like to use dynamic types in JS.
+     * Note that setting allowJs false does not prevent the use
+     * of JS in `.svelte` files.
+     */
+    "allowJs": true,
+    "checkJs": true,
+    "isolatedModules": true
+  },
+  "include": ["src/**/*.ts", "src/**/*.js", "src/**/*.svelte"],
+  "references": [{ "path": "./tsconfig.node.json" }]
+}

av-sync/tsconfig.node.json

@@ -0,0 +1,10 @@
+{
+  "compilerOptions": {
+    "composite": true,
+    "skipLibCheck": true,
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "strict": true
+  },
+  "include": ["vite.config.ts"]
+}

av-sync/vite.config.ts

@@ -0,0 +1,7 @@
+import { defineConfig } from 'vite'
+import { svelte } from '@sveltejs/vite-plugin-svelte'
+
+// https://vitejs.dev/config/
+export default defineConfig({
+  plugins: [svelte()],
+})

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "testcard",
-	"version": "0.0.1",
+	"version": "0.0.0",
 	"private": true,
 	"scripts": {
 		"dev": "vite dev",
@@ -9,32 +9,45 @@
 		"check": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json",
 		"check:watch": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json --watch",
 		"lint": "prettier --check . && eslint .",
-		"format": "prettier --write ."
+		"format": "prettier --write .",
+		"generate-assets": "earthly +assets-generated",
+		"av:dev": "cd av-sync && vite",
+		"av:render:video": "cd av-sync && concurrently -P -k -s command-1 \"vite --port 8626\" \"wait-on http://localhost:8626 && node render-video.js --url http://localhost:8626 {@}\" --",
+		"av:render:audio": "cd av-sync && node render-audio.js"
 	},
 	"devDependencies": {
-		"@sveltejs/adapter-auto": "^3.0.0",
+		"@tsconfig/svelte": "^5.0.2",
-		"@sveltejs/kit": "^2.0.0",
+		"@types/debug": "^4.1.12",
-		"@sveltejs/vite-plugin-svelte": "^3.0.0",
 		"@types/eslint": "8.56.0",
 		"@types/lodash": "^4.14.202",
 		"@typescript-eslint/eslint-plugin": "^6.0.0",
 		"@typescript-eslint/parser": "^6.0.0",
+		"commander": "^12.0.0",
+		"concurrently": "^8.2.2",
 		"eslint": "^8.56.0",
 		"eslint-config-prettier": "^9.1.0",
 		"eslint-plugin-svelte": "^2.35.1",
+		"node-wav": "^0.0.2",
 		"prettier": "^3.1.1",
 		"prettier-plugin-svelte": "^3.1.2",
-		"svelte": "^4.2.7",
+		"puppeteer": "^22.1.0",
 		"svelte-check": "^3.6.0",
-		"tslib": "^2.4.1",
+		"wait-on": "^7.2.0"
-		"typescript": "^5.0.0",
-		"vite": "^5.0.3"
 	},
 	"type": "module",
 	"dependencies": {
 		"@fontsource/b612": "^5.0.8",
+		"@sveltejs/adapter-auto": "^3.0.0",
 		"@sveltejs/adapter-static": "^3.0.1",
+		"@sveltejs/kit": "^2.0.0",
+		"@sveltejs/vite-plugin-svelte": "^3.0.0",
+		"@tabler/icons-webfont": "^2.47.0",
+		"debug": "^4.3.4",
 		"lodash": "^4.17.21",
-		"normalize.css": "^8.0.1"
+		"normalize.css": "^8.0.1",
+		"svelte": "^4.2.7",
+		"tslib": "^2.4.1",
+		"typescript": "^5.0.0",
+		"vite": "^5.0.3"
 	}
 }

src/index.css

@@ -9,9 +9,45 @@ body, html {
   background-color: black;
 
   font-family: 'B612', 'IBM Plex Sans', 'Helvetica Neue', Arial, sans-serif;
-  font-size: 1.5vw;
+  font-size: min(1.5vw, 1.5vh);
 }
 
 * {
   box-sizing: border-box;
 }
+
+a {
+  color: white;
+}
+
+
+h1, h2, h3, h4 {
+  margin-top: 0;
+}
+
+button, .button {
+  display: inline-flex;
+  align-items: center;
+  gap: 0.25em;
+  text-decoration: none;
+  border: 1px solid white;
+  cursor: pointer;
+
+  padding: 0.25em 0.5em;
+  border-radius: 0.25em;
+
+  background: black;
+  color: white;
+}
+
+select {
+  background: black;
+  color: white;
+  padding: 0.25em 0.5em;
+  border-radius: 0.25em;
+  border: 1px solid white;
+
+  &:disabled {
+    opacity: 0.7;
+  }
+}

src/lib/BackgroundGrid.svelte

@@ -16,7 +16,8 @@
 	let verticalMargin = MARGIN_SIZE;
 	let unloaded = true;
 
-	let transparent = false;
+	export let transparent = false;
+	export let subdued = false;
 
 	function updateCounts() {
 		const gridWidth = window.innerWidth - MARGIN_SIZE;
@@ -72,6 +73,7 @@
 	class="background"
 	class:unloaded
 	class:transparent
+	class:subdued
 	class:even-vertical={verticalCount % 2 === 0}
 	style="--horizontal-count: {horizontalCount};
 					 --vertical-count: {verticalCount};
@@ -266,6 +268,13 @@
 		}
 	}
 
+	.background.subdued {
+		& .edge,
+		& .corner {
+			opacity: 0.33;
+		}
+	}
+
 	.grid {
 		display: grid;
 		grid-template-columns: repeat(var(--horizontal-count), var(--block-size));

src/lib/Spinner.svelte

@@ -0,0 +1,22 @@
+<script>
+	import { IconSpiral } from '@tabler/icons-svelte';
+	export let size = 32;
+</script>
+
+<div class="spinner"><IconSpiral {size} class="spinner-icon" /></div>
+
+<style>
+	.spinner {
+		text-align: center;
+	}
+
+	:global(.spinner-icon) {
+		animation: spin 1s linear infinite;
+	}
+
+	@keyframes spin {
+		100% {
+			transform: rotate(360deg);
+		}
+	}
+</style>

src/lib/TestCard.svelte

@@ -4,7 +4,10 @@
 	import Axes from '$lib/Axes.svelte';
 	import ColorGradient from '$lib/ColorGradient.svelte';
 	import BrightnessGradient from '$lib/BrightnessGradient.svelte';
-	import { onMount } from 'svelte';
+	import { createEventDispatcher } from 'svelte';
+	const dispatch = createEventDispatcher<{ focus: void }>();
+
+	export let full = false;
 
 	let sizes = {
 		blockSize: 64,
@@ -20,16 +23,12 @@
 	$: circleBlocks =
 		2 * Math.floor((Math.min(sizes.horizontalCount, sizes.verticalCount) * 0.66) / 2) +
 		(sizes.horizontalCount % 2);
-
-	onMount(() => {
-		window.addEventListener('dblclick', () => {
-			document.body.requestFullscreen();
-		});
-	});
 </script>
 
+<!-- svelte-ignore a11y-no-static-element-interactions -->
 <div
 	class="test-card"
+	class:full
 	style="--block-size: {sizes.blockSize}px;
 				 --horizontal-margin: {sizes.horizontalMargin}px;
 				 --vertical-margin: {sizes.verticalMargin}px;
@@ -37,9 +36,13 @@
          --column-width: {columnWidth};
          --column-height: {columnHeight};
          --left-column: {leftColumn};"
+	on:dblclick={() => dispatch('focus') && document.body.requestFullscreen()}
 >
-	<BackgroundGrid on:change={(ev) => (sizes = ev.detail)} />
+	<BackgroundGrid on:change={(ev) => (sizes = ev.detail)} subdued={!full} />
-	<Axes />
+
+	<div class="axes">
+		<Axes />
+	</div>
 
 	<div class="outer"></div>
 	<div class="inner"></div>
@@ -137,4 +140,13 @@
 			flex-grow: 1;
 		}
 	}
+
+	.test-card:not(.full) {
+		& .info,
+		& .column,
+		& .axes,
+		& .inner {
+			display: none;
+		}
+	}
 </style>

src/routes/+layout.svelte

@@ -0,0 +1,77 @@
+<script lang="ts">
+	import 'normalize.css/normalize.css';
+	import '@fontsource/b612';
+	import '@fontsource/b612/700.css';
+	import '@tabler/icons-webfont/tabler-icons.css';
+	import '../index.css';
+	import TestCard from '$lib/TestCard.svelte';
+	import { page } from '$app/stores';
+	import { onMount } from 'svelte';
+	import { goto } from '$app/navigation';
+
+	let idleTimeout: NodeJS.Timeout | undefined;
+	onMount(() => {
+		window.addEventListener('mousemove', () => {
+			clearTimeout(idleTimeout);
+			document.body.classList.remove('idle');
+			idleTimeout = setTimeout(() => {
+				document.body.classList.add('idle');
+			}, 3000);
+		});
+	});
+
+	$: onlyCard = $page.data.card;
+</script>
+
+<TestCard full={onlyCard} on:focus={() => goto('/card')} />
+<main class:content={!onlyCard} class:sub={!$page.data.root && !onlyCard}>
+	<a href=".." class="button button-back"><i class="ti ti-arrow-back" />Back</a>
+	<slot />
+</main>
+
+<style>
+	main.content {
+		position: absolute;
+		top: 50%;
+		left: 50%;
+		transform: translate(-50%, -50%);
+		background: rgba(0, 0, 0, 0.8);
+		border-radius: 0.5rem;
+		border: 1px solid white;
+
+		padding: 1rem;
+
+		display: flex;
+		flex-direction: column;
+	}
+
+	main.sub {
+		height: 90vh;
+		width: 90vw;
+	}
+
+	.button-back {
+		position: absolute;
+		top: 1rem;
+		right: 1rem;
+
+		opacity: 0.66;
+		transition: opacity 0.3s;
+		&:hover {
+			opacity: 1;
+		}
+	}
+
+	main:not(.sub) .button-back {
+		display: none;
+	}
+
+	:global(.hide-idle) {
+		transition: opacity 1s;
+		opacity: 1;
+	}
+
+	:global(body.idle .hide-idle) {
+		opacity: 0;
+	}
+</style>

src/routes/+page.svelte

@@ -1,9 +1,87 @@
 <script>
-	import 'normalize.css/normalize.css';
+	import { version } from '../../package.json';
-	import '@fontsource/b612';
-	import '@fontsource/b612/700.css';
-	import '../index.css';
-	import TestCard from '$lib/TestCard.svelte';
 </script>
 
-<TestCard />
+<nav>
+	<h1>Universal Test Card</h1>
+
+	<div class="options">
+		<a href="card">
+			<i class="ti ti-device-desktop"></i>
+			Screen
+		</a>
+		<a href="audio">
+			<i class="ti ti-volume"></i>
+			Audio
+		</a>
+		<a href="av-sync">
+			<i class="ti ti-time-duration-off"></i>
+			AV&nbsp;Sync
+		</a>
+		<a href="keyboard">
+			<i class="ti ti-keyboard"></i>
+			Keyboard
+		</a>
+		<a href="mouse" class="disabled">
+			<i class="ti ti-mouse"></i>
+			Mouse
+		</a>
+		<a href="gamepad">
+			<i class="ti ti-device-gamepad"></i>
+			Gamepad
+		</a>
+		<a href="camera">
+			<i class="ti ti-camera"></i>
+			Camera
+		</a>
+		<a href="microphone" class="disabled">
+			<i class="ti ti-microphone"></i>
+			Microphone
+		</a>
+		<a href="sensors" class="disabled">
+			<i class="ti ti-cpu-2"></i>
+			Sensors
+		</a>
+	</div>
+</nav>
+<footer><a href="https://git.thm.place/thm/test-card">testcard v{version}</a></footer>
+
+<style>
+	h1 {
+		text-align: center;
+		font-size: 3rem;
+		margin: 1rem;
+		text-transform: uppercase;
+	}
+
+	.options {
+		display: flex;
+		justify-content: space-evenly;
+		align-items: center;
+		gap: 2em;
+
+		& a {
+			text-align: center;
+			text-decoration: none;
+
+			&.disabled {
+				pointer-events: none;
+				opacity: 0.5;
+			}
+		}
+
+		& .ti {
+			display: block;
+			font-size: 3rem;
+		}
+	}
+
+	footer {
+		text-align: center;
+		opacity: 0.6;
+		margin-top: 1rem;
+		& a {
+			text-decoration: none;
+		}
+	}
+</style>

src/routes/+page.ts

@@ -0,0 +1,7 @@
+import type { PageLoad } from './$types';
+
+export const load: PageLoad = () => {
+	return {
+		root: true
+	}
+}

src/routes/audio/(channels)/+layout.svelte

@@ -0,0 +1,51 @@
+<script lang="ts">
+	import CycleButton from './cycle-button.svelte';
+
+	let channelsEl: HTMLDivElement;
+</script>
+
+<div class="channels" bind:this={channelsEl}>
+	<slot />
+</div>
+<div class="controls">
+	<CycleButton element={channelsEl} />
+</div>
+
+<style>
+	.channels {
+		display: flex;
+		flex-direction: column;
+		justify-content: space-evenly;
+		font-size: 2rem;
+		flex-grow: 1;
+
+		position: relative;
+	}
+
+	:global(.channels .row) {
+		display: flex;
+		justify-content: space-between;
+	}
+
+	.controls {
+		text-align: center;
+		margin: 2rem 0;
+		font-size: 1.5rem;
+	}
+
+	:global(.channels .center) {
+		font-size: 0.9em;
+	}
+
+	:global(.channels .label) {
+		opacity: 0.2;
+		font-size: 6rem;
+
+		position: absolute;
+		top: 50%;
+		left: 50%;
+		transform: translate(-50%, -50%);
+
+		pointer-events: none;
+	}
+</style>

src/routes/audio/(channels)/channels-5.1/+page.svelte

@@ -0,0 +1,24 @@
+<script lang="ts">
+	import Speaker from '../speaker.svelte';
+	import frontLeftUrl from '@assets/audio/5.1/Front_Left.mp3';
+	import frontCenterUrl from '@assets/audio/5.1/Front_Center.mp3';
+	import frontRightUrl from '@assets/audio/5.1/Front_Right.mp3';
+	import rearLeftUrl from '@assets/audio/5.1/Rear_Left.mp3';
+	import rearRightUrl from '@assets/audio/5.1/Rear_Right.mp3';
+	import LfeUrl from '@assets/audio/5.1/LFE_Noise.mp3';
+</script>
+
+<div class="row">
+	<Speaker src={frontLeftUrl} left>Front Left</Speaker>
+	<div class="center">
+		<Speaker src={frontCenterUrl} center>Front Center</Speaker>
+	</div>
+	<Speaker src={frontRightUrl} right>Front Right</Speaker>
+</div>
+<div class="row">
+	<Speaker src={rearLeftUrl} left>Rear Left</Speaker>
+	<Speaker src={rearRightUrl} right>Rear Right</Speaker>
+</div>
+<Speaker src={LfeUrl} lfe>LFE</Speaker>
+
+<div class="label">5.1</div>

src/routes/audio/(channels)/channels-7.1/+page.svelte

@@ -0,0 +1,31 @@
+<script lang="ts">
+	import Speaker from '../speaker.svelte';
+	import frontLeftUrl from '@assets/audio/7.1/Front_Left.mp3';
+	import frontCenterUrl from '@assets/audio/7.1/Front_Center.mp3';
+	import frontRightUrl from '@assets/audio/7.1/Front_Right.mp3';
+	import sideLeftUrl from '@assets/audio/7.1/Side_Left.mp3';
+	import sideRightUrl from '@assets/audio/7.1/Side_Right.mp3';
+	import rearLeftUrl from '@assets/audio/7.1/Rear_Left.mp3';
+	import rearRightUrl from '@assets/audio/7.1/Rear_Right.mp3';
+	import LfeUrl from '@assets/audio/7.1/LFE_Noise.mp3';
+</script>
+
+<div class="row">
+	<Speaker src={frontLeftUrl} left>Front Left</Speaker>
+	<div class="center">
+		<Speaker src={frontCenterUrl} center>Front Center</Speaker>
+	</div>
+	<Speaker src={frontRightUrl} right>Front Right</Speaker>
+</div>
+<div class="row">
+	<Speaker src={sideLeftUrl} left>Side Left</Speaker>
+	<Speaker src={sideRightUrl} right>Side Right</Speaker>
+</div>
+
+<div class="row">
+	<Speaker src={rearLeftUrl} left>Rear Left</Speaker>
+	<Speaker src={rearRightUrl} right>Rear Right</Speaker>
+</div>
+<Speaker src={LfeUrl} lfe>LFE</Speaker>
+
+<div class="label">7.1</div>

src/routes/audio/(channels)/cycle-button.svelte

@@ -0,0 +1,53 @@
+<script lang="ts">
+	import { onDestroy } from 'svelte';
+
+	export let element: HTMLElement;
+
+	let cycling = false;
+	let currentChannel: HTMLAudioElement | undefined;
+	async function cycleChannels() {
+		cycling = true;
+		const buttons = element.querySelectorAll('button');
+		buttons.forEach((button) => (button.disabled = true));
+		const channels = element.querySelectorAll('audio');
+		while (cycling) {
+			for (const channel of channels) {
+				currentChannel = channel;
+				await channel.play();
+				await new Promise((resolve) => {
+					channel.onended = resolve;
+				});
+				if (!cycling) {
+					break;
+				}
+			}
+		}
+		buttons.forEach((button) => (button.disabled = false));
+	}
+
+	function onClick() {
+		cycling = !cycling;
+		if (cycling) {
+			cycleChannels();
+		} else {
+			if (currentChannel) {
+				currentChannel.pause();
+				currentChannel.currentTime = 0;
+			}
+		}
+	}
+
+	onDestroy(() => {
+		cycling = false;
+		currentChannel?.pause();
+	});
+</script>
+
+<button on:click={onClick}>
+	<i class="ti ti-refresh"></i>
+	{#if cycling}
+		Stop Cycling
+	{:else}
+		Cycle through
+	{/if}
+</button>

src/routes/audio/(channels)/speaker.svelte

@@ -0,0 +1,97 @@
+<script lang="ts">
+	export let src: string;
+	export let left = false;
+	export let center = false;
+	export let right = false;
+	export let lfe = false;
+	export let inline = false;
+
+	let currentTime = 0;
+	let paused = true;
+	function play() {
+		currentTime = 0;
+		paused = false;
+	}
+</script>
+
+<button
+	class="speaker"
+	class:left
+	class:right
+	class:center
+	class:lfe
+	class:inline
+	class:playing={!paused}
+	on:click={play}
+>
+	{#if !lfe}
+		<i class="ti ti-volume"></i>
+	{:else}
+		<i class="ti ti-wave-sine"></i>
+	{/if}
+	<span><slot /></span>
+	<audio bind:currentTime bind:paused {src}></audio>
+</button>
+
+<style>
+	.speaker {
+		border: none;
+		background: transparent;
+
+		display: inline-flex;
+		flex-direction: column;
+		text-align: center;
+
+		opacity: 0.8;
+
+		& .ti {
+			font-size: 3em;
+		}
+
+		&.right .ti {
+			display: block;
+			transform: rotate(180deg);
+		}
+
+		&.center .ti {
+			display: block;
+			transform: rotate(90deg);
+		}
+
+		&:disabled {
+			opacity: 0.5;
+		}
+
+		&.playing {
+			transform: scale(1.1);
+			opacity: 1;
+		}
+
+		transition:
+			transform 0.2s ease,
+			opacity 0.2s ease;
+
+		&.inline {
+			flex-direction: row;
+			align-items: center;
+			justify-content: center;
+			background: black;
+			border: 1px solid white;
+
+			opacity: 1;
+
+			& .ti {
+				font-size: 1.5em;
+			}
+
+			&.playing {
+				transform: scale(1);
+				opacity: 0.8;
+			}
+		}
+
+		&:active {
+			transform: scale(1);
+		}
+	}
+</style>

src/routes/audio/(channels)/stereo-test.svelte

@@ -0,0 +1,34 @@
+<script lang="ts">
+	import leftUrl from '@assets/audio/stereo/Left.mp3';
+	import centerUrl from '@assets/audio/stereo/Center.mp3';
+	import rightUrl from '@assets/audio/stereo/Right.mp3';
+	import Speaker from './speaker.svelte';
+	import CycleButton from './cycle-button.svelte';
+
+	let speakersEl: HTMLElement;
+</script>
+
+<div class="test">
+	<div class="speakers" bind:this={speakersEl}>
+		<Speaker src={leftUrl} left inline>Left</Speaker>
+		<Speaker src={centerUrl} center inline>Center</Speaker>
+		<Speaker src={rightUrl} right inline>Right</Speaker>
+	</div>
+	<CycleButton element={speakersEl} />
+</div>
+
+<style>
+	.test {
+		display: flex;
+		gap: 1em;
+		align-items: center;
+		margin: 0.5em 0;
+	}
+
+	.speakers {
+		display: flex;
+		gap: 1em;
+		font-size: 1.25em;
+		margin-right: 1em;
+	}
+</style>

src/routes/audio/+layout.svelte

@@ -0,0 +1,5 @@
+<script lang="ts">
+</script>
+
+<h2><i class="ti ti-volume"></i> Audio test</h2>
+<slot />

src/routes/audio/+layout.ts

@@ -0,0 +1 @@
+export const trailingSlash = 'always';

src/routes/audio/+page.svelte

@@ -0,0 +1,37 @@
+<script lang="ts">
+	import StereoTest from './(channels)/stereo-test.svelte';
+</script>
+
+<article>
+	<h3>Channel tests</h3>
+	<h4>Stereo</h4>
+	<section>
+		<StereoTest />
+	</section>
+	<h4>Surround audio</h4>
+	<section>
+		<ul>
+			<li><a class="button" href="channels-5.1">5.1 Surround</a></li>
+			<li><a class="button" href="channels-7.1">7.1 Surround</a></li>
+		</ul>
+	</section>
+</article>
+
+<style>
+	h4 {
+		margin-bottom: 0;
+	}
+
+	ul {
+		list-style-type: none;
+		padding: 0;
+		margin: 0;
+
+		display: inline-flex;
+		gap: 1em;
+	}
+
+	section {
+		margin: 1em 0;
+	}
+</style>

src/routes/av-sync/+page.svelte

@@ -0,0 +1,30 @@
+<script lang="ts">
+	import videoUrl from '@assets/avsync.webm';
+	let paused = true;
+</script>
+
+<h2><i class="ti ti-time-duration-off"></i> Audio/Video Synchronization</h2>
+<!-- svelte-ignore a11y-media-has-caption -->
+<video
+	class:playing={!paused}
+	autoplay
+	loop
+	bind:paused
+	src={videoUrl}
+	on:click={() => (paused = false)}
+></video>
+
+<style>
+	video {
+		flex-grow: 1;
+
+		&:not(.playing) {
+			opacity: 0.5;
+			filter: grayscale(0.8);
+		}
+
+		transition:
+			opacity 0.3s,
+			filter 0.3s;
+	}
+</style>

src/routes/camera/+page.svelte

@@ -0,0 +1,259 @@
+<script lang="ts">
+	import { onDestroy, onMount } from 'svelte';
+	import { browser } from '$app/environment';
+	import debug from 'debug';
+	const dbg = debug('app:camera');
+
+	let video: HTMLVideoElement;
+	let devices: MediaDeviceInfo[] = [];
+	let currentDevice: string | undefined;
+
+	let requestResolution: [number, number] | 'auto' = 'auto';
+	let requestFramerate: number | 'auto' = 'auto';
+	let deviceInfo: {
+		resolution?: string;
+		frameRate?: number;
+	} = {};
+	let snapshot: string | undefined;
+	let flipped = false;
+
+	$: dbg('devices %O', devices);
+	$: dbg('currentDevice %s', currentDevice);
+
+	onMount(() => {
+		refreshDevices();
+		video.addEventListener('playing', () => {
+			if (browser && video?.srcObject instanceof MediaStream) {
+				deviceInfo = {
+					resolution: `${video.videoWidth}x${video.videoHeight}`,
+					frameRate: video?.srcObject?.getVideoTracks()[0]?.getSettings().frameRate
+				};
+			}
+		});
+	});
+
+	onDestroy(() => {
+		if (browser && video?.srcObject instanceof MediaStream) {
+			video.srcObject.getTracks().forEach((t) => t.stop());
+		}
+	});
+
+	async function refreshDevices() {
+		devices = (await navigator.mediaDevices.enumerateDevices()).filter(
+			(d) => d.kind === 'videoinput'
+		);
+		if (!currentDevice) {
+			currentDevice = devices[0]?.deviceId;
+		}
+	}
+
+	$: if (currentDevice) {
+		navigator.mediaDevices
+			.getUserMedia({
+				video: {
+					deviceId: currentDevice,
+					width: requestResolution === 'auto' ? undefined : requestResolution[0],
+					height: requestResolution === 'auto' ? undefined : requestResolution[1],
+					frameRate: requestFramerate === 'auto' ? undefined : requestFramerate
+				}
+			})
+			.then((stream) => {
+				video.srcObject = stream;
+				refreshDevices();
+			});
+	}
+
+	async function takeSnapshot() {
+		const canvas = document.createElement('canvas');
+		canvas.width = video.videoWidth;
+		canvas.height = video.videoHeight;
+		const ctx = canvas.getContext('2d');
+		if (!ctx) return;
+		if (flipped) {
+			ctx.scale(-1, 1);
+			ctx.translate(-canvas.width, 0);
+		}
+		ctx.drawImage(video, 0, 0, canvas.width, canvas.height);
+		snapshot = canvas.toDataURL('image/png');
+	}
+</script>
+
+<h2><i class="ti ti-camera"></i> Camera test</h2>
+
+<div class="controls">
+	<label>
+		Device
+		<select bind:value={currentDevice} disabled={!devices.length}>
+			{#each devices as device}
+				<option value={device.deviceId}>{device.label || '???'}</option>
+			{:else}
+				<option>No camera found</option>
+			{/each}
+		</select>
+	</label>
+	<button on:click={refreshDevices}>
+		<i class="ti ti-refresh"></i>
+		Refresh
+	</button>
+	<div class="separator"></div>
+	<label>
+		Resolution
+		<select bind:value={requestResolution}>
+			<option value="auto">Auto</option>
+			<option value={[4096, 2160]}>4096x2160</option>
+			<option value={[3840, 2160]}>3840x2160</option>
+			<option value={[1920, 1080]}>1920x1080</option>
+			<option value={[1280, 720]}>1280x720</option>
+			<option value={[640, 480]}>640x480</option>
+			<option value={[320, 240]}>320x240</option>
+		</select>
+	</label>
+	<label>
+		Frame rate
+		<select bind:value={requestFramerate}>
+			<option value="auto">Auto</option>
+			<option value={120}>120 fps</option>
+			<option value={60}>60 fps</option>
+			<option value={30}>30 fps</option>
+			<option value={15}>15 fps</option>
+			<option value={10}>10 fps</option>
+			<option value={5}>5 fps</option>
+		</select>
+	</label>
+</div>
+
+<div class="display" class:snapshot={Boolean(snapshot)}>
+	<!-- svelte-ignore a11y-media-has-caption -->
+	<video class:flipped bind:this={video} autoplay class:unloaded={!currentDevice}></video>
+	{#if snapshot}
+		<!-- svelte-ignore a11y-missing-attribute -->
+		<!--suppress HtmlRequiredAltAttribute -->
+		<img src={snapshot} />
+		<button on:click={() => (snapshot = undefined)}><i class="ti ti-x"></i></button>
+	{/if}
+</div>
+
+<footer>
+	{#if !currentDevice}
+		<span class="subdued">No camera selected</span>
+	{:else}
+		<ul>
+			{#key currentDevice}
+				<li>
+					Resolution: <strong>{deviceInfo.resolution || '???'}</strong>
+				</li>
+				<li>
+					Frame rate: <strong>{deviceInfo.frameRate || '???'}</strong>
+				</li>
+			{/key}
+		</ul>
+		<div class="controls">
+			<button on:click={takeSnapshot}>
+				<i class="ti ti-camera"></i>
+				Take picture
+			</button>
+			<button on:click={() => (flipped = !flipped)}>
+				<i class="ti ti-flip-vertical"></i>
+				{#if flipped}
+					Unflip image
+				{:else}
+					Flip image
+				{/if}
+			</button>
+		</div>
+	{/if}
+</footer>
+
+<style>
+	.controls {
+		display: flex;
+		align-items: end;
+		justify-content: stretch;
+		gap: 1em;
+
+		& label:first-child {
+			flex-grow: 1;
+			min-width: 0;
+		}
+	}
+
+	select {
+		background: black;
+		color: white;
+		padding: 0.25em 0.5em;
+		border-radius: 0.25em;
+		border: 1px solid white;
+	}
+
+	label {
+		display: flex;
+		flex-direction: column;
+		gap: 0.2em;
+
+		font-size: 0.8em;
+		& select {
+			font-size: initial;
+		}
+	}
+
+	.display {
+		position: relative;
+		display: flex;
+		flex-direction: column;
+		min-height: 0;
+		flex-grow: 1;
+		justify-content: center;
+
+		& img {
+			object-fit: contain;
+		}
+
+		& button {
+			position: absolute;
+			top: 1em;
+			right: 1em;
+		}
+
+		&.snapshot {
+			& video {
+				display: none;
+			}
+		}
+	}
+
+	video {
+		min-width: 0;
+		min-height: 0;
+		max-width: 100%;
+		max-height: 100%;
+
+		margin: 1em 0;
+
+		&.unloaded {
+			background: repeating-linear-gradient(45deg, gray, gray 20px, darkgray 20px, darkgray 40px);
+			flex-grow: 1;
+		}
+
+		&.flipped {
+			transform: scaleX(-1);
+		}
+	}
+
+	footer {
+		display: flex;
+		justify-content: space-between;
+		align-items: center;
+	}
+
+	ul {
+		list-style: none;
+		margin: 0;
+		padding: 0;
+		display: inline-flex;
+		gap: 1rem;
+	}
+
+	.subdued {
+		opacity: 0.8;
+	}
+</style>

src/routes/card/+page.svelte

@@ -0,0 +1,25 @@
+<script>
+</script>
+
+<a href="/" class="hide-idle"><i class="ti ti-arrow-back"></i> Back</a>
+
+<style>
+	a {
+		position: absolute;
+		top: 2rem;
+		right: 2rem;
+
+		background: black;
+		border: 1px solid white;
+		border-radius: 0.2em;
+		padding: 0.5em 1em;
+
+		box-shadow: 0 0 0.5em rgba(255, 255, 255, 0.5);
+
+		display: flex;
+		gap: 0.5em;
+		align-items: center;
+
+		text-decoration: none;
+	}
+</style>

src/routes/card/+page.ts

@@ -0,0 +1,7 @@
+import type { PageLoad } from './$types';
+
+export const load: PageLoad = () => {
+	return {
+		card: true
+	};
+};

src/routes/gamepad/+page.svelte

@@ -0,0 +1,163 @@
+<script lang="ts">
+	import { onMount } from 'svelte';
+	import { browser } from '$app/environment';
+	import debug from 'debug';
+	const dbg = debug('app:camera');
+
+	let gamepads: Gamepad[] = [];
+	let currentGamepad: Gamepad | undefined;
+	let buttons: GamepadButton[] = [];
+	let axes: number[] = [];
+
+	$: {
+		if (currentGamepad) {
+			function update() {
+				buttons = currentGamepad?.buttons.concat() || [];
+				axes = currentGamepad?.axes.concat() || [];
+				requestAnimationFrame(update);
+			}
+			update();
+		}
+	}
+
+	$: dbg('Gamepads %O', gamepads);
+	$: dbg('Current gamepad %s', currentGamepad);
+
+	$: currentGamepad?.vibrationActuator?.playEffect('dual-rumble', {
+		duration: 1000
+	});
+
+	onMount(() => {
+		refreshGamepads();
+	});
+
+	async function refreshGamepads() {
+		gamepads = browser ? (navigator.getGamepads().filter(Boolean) as Gamepad[]) : [];
+		currentGamepad = gamepads[0];
+	}
+
+	onMount(() => {
+		window.addEventListener('gamepadconnected', (e) => {
+			dbg('Gamepad connected', e);
+			refreshGamepads();
+		});
+
+		window.addEventListener('gamepaddisconnected', (e) => {
+			dbg('Gamepad disconnected', e);
+			refreshGamepads();
+		});
+	});
+</script>
+
+<h2><i class="ti ti-device-gamepad"></i> Gamepad & Joystick Tests</h2>
+<div class="controls">
+	<label>
+		Device
+		<select disabled={!gamepads.length}>
+			{#each gamepads as gamepad}
+				<option value={gamepad.index}>{gamepad.id}</option>
+			{:else}
+				<option>No gamepads detected. (Try pressing a button)</option>
+			{/each}
+		</select>
+	</label>
+	<button on:click={refreshGamepads}>
+		<i class="ti ti-refresh"></i>
+		Refresh
+	</button>
+</div>
+
+{#if currentGamepad}
+	<section>
+		<h3>Buttons</h3>
+		<ul class="buttons">
+			{#each buttons as button, i}
+				<li class:pressed={button.pressed}>{i}</li>
+			{/each}
+		</ul>
+	</section>
+	<section>
+		<h3>Axes</h3>
+		<div class="axes">
+			{#each axes as axis, i (i)}
+				<div class="axis">
+					<div>
+						<span>{i}</span>
+						<progress value={axis + 1} max="2"></progress>
+						<span>{axis.toFixed(2)}</span>
+					</div>
+				</div>
+			{/each}
+		</div>
+	</section>
+{/if}
+
+<style>
+	.controls {
+		display: flex;
+		align-items: end;
+		justify-content: stretch;
+		gap: 1em;
+
+		& label:first-child {
+			flex-grow: 1;
+			min-width: 0;
+		}
+	}
+
+	label {
+		display: flex;
+		flex-direction: column;
+		gap: 0.2em;
+
+		font-size: 0.8em;
+		& select {
+			font-size: initial;
+		}
+	}
+
+	h3 {
+		margin-top: 2em;
+		text-align: center;
+	}
+
+	.buttons {
+		list-style: none;
+		margin: 0;
+		padding: 0;
+
+		display: flex;
+		flex-wrap: wrap;
+		justify-content: space-evenly;
+
+		& li {
+			display: block;
+			width: 2em;
+			height: 2em;
+			border: 1px solid white;
+			border-radius: 0.75em;
+			text-align: center;
+			line-height: 2em;
+
+			&.pressed {
+				background-color: darkred;
+				color: white;
+			}
+		}
+	}
+
+	.axes {
+		display: grid;
+		grid-template-columns: repeat(2, 1fr);
+		gap: 0.5em 2em;
+
+		& .axis div {
+			display: flex;
+			gap: 0.25em;
+
+			& progress {
+				flex-grow: 1;
+			}
+		}
+	}
+</style>

src/routes/keyboard/+page.svelte

@@ -0,0 +1,59 @@
+<script lang="ts">
+	import { onMount } from 'svelte';
+
+	let key: string;
+	let code: string;
+	let pressedKeys: string[] = [];
+	onMount(() => {
+		document.addEventListener('keydown', (event) => {
+			key = event.key;
+			code = event.code;
+			pressedKeys = [...pressedKeys, event.key];
+			pressedKeys = pressedKeys.slice(-50);
+		});
+	});
+</script>
+
+<h2>Keyboard testing</h2>
+<p>Press a key on the keyboard to see the event object and the key code.</p>
+<div class="current">
+	{#if key}
+		<span>{key}</span>
+	{/if}
+	{#if code}
+		<span class="code">({code})</span>
+	{/if}
+</div>
+
+<p>Pressed keys:</p>
+<ul>
+	{#each pressedKeys as key}
+		<li>{key}</li>
+	{/each}
+</ul>
+
+<style>
+	.current {
+		display: flex;
+	}
+
+	.code {
+		margin-left: 1em;
+		opacity: 0.8;
+	}
+
+	ul {
+		list-style: none;
+		padding: 0;
+
+		display: flex;
+		flex-wrap: wrap;
+		gap: 0.2em;
+	}
+
+	li {
+		margin: 0;
+		padding: 0;
+		display: inline-block;
+	}
+</style>

vite.config.ts

@@ -1,6 +1,17 @@
 import { sveltekit } from '@sveltejs/kit/vite';
 import { defineConfig } from 'vite';
+import * as path from 'path';
 
 export default defineConfig({
-	plugins: [sveltekit()]
+	plugins: [sveltekit()],
+	resolve: {
+		alias: {
+			'@assets': path.join(__dirname, 'assets/generated')
+		}
+	},
+	server: {
+		fs: {
+			allow: [path.join(__dirname, 'assets/generated'), path.join(__dirname, 'package.json')]
+		}
+	}
 });