Audio capture and streaming app for webOS 5/6
Captures the TV's audio and sends it out over several transports. The
primary one is HyperHDR: RTP/L16 to a host-side loopback device, since
HyperHDR has no network audio input of its own. A second route renders
the spectrum on the TV and sends FlatBuffers images to port 19400
instead, for setups where touching the host's sound config is not an
option.
native/ the service: capture backends (PulseAudio, ALSA, exec,
test tone, all dlopen-based), DSP, and one file per sink
frontend/ D-pad driven UI at a fixed 1920x1080
servicefiles/ native service manifest plus the boot script
host/ RTP receiver and the loopback installer for the HyperHDR
machine
tools/ build/package, asset generation, Homebrew Channel
manifest, on-TV probe
test/ host-side suites: FlatBuffers and RTP verified against
real decoders, the engine end to end, the page in jsdom
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Rene Kievits
@@ -0,0 +1,203 @@
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// Stand-in for the Luna bus so the UI can be opened in a desktop browser.
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// Only loaded when PalmServiceBridge is missing, which never happens on a TV.
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(function (global) {
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'use strict';
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var settings = {
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autoStart: false,
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logLevel: 'info',
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capture: { backend: 'auto', device: '', server: '', command: '', rate: 48000, channels: 2 },
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dsp: { attack: 0.6, release: 0.12 },
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sinks: ['hyperhdr'],
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hyperhdr: { host: '192.168.1.50', port: 5004, multicast: false, multicastTtl: 4, sapAnnounce: true },
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hyperhdrViz: {
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host: '', port: 19400, priority: 150, width: 64, height: 36, fps: 30,
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mode: 'spectrum', saturation: 1.0, minBrightness: 0.02,
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},
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udp: { host: '', port: 4010, multicastTtl: 4 },
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tcp: { port: 4011, maxClients: 4 },
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http: { port: 4012, maxClients: 4 },
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};
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var running = false;
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var subscribers = [];
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var startedAt = 0;
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function merge(base, patch) {
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Object.keys(patch).forEach(function (k) {
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if (patch[k] && typeof patch[k] === 'object' && !Array.isArray(patch[k])
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&& base[k] && typeof base[k] === 'object' && !Array.isArray(base[k])) {
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merge(base[k], patch[k]);
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} else {
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base[k] = patch[k];
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}
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});
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}
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function status(subscribed) {
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var t = Date.now() / 1000;
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var bands = [];
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for (var i = 0; i < 16; i++) {
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var v = running ? Math.abs(Math.sin(t * (1 + i * 0.25) + i)) * (1 - i / 24) : 0;
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bands.push(Math.max(0, Math.min(1, v)));
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}
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var peak = running ? 0.4 + 0.4 * Math.abs(Math.sin(t * 2)) : 0;
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return {
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returnValue: true,
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subscribed: !!subscribed,
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state: running ? 'running' : 'stopped',
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running: running,
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error: null,
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capture: {
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backend: running ? 'pulse' : null,
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backendName: running ? 'PulseAudio (mock)' : null,
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device: '@DEFAULT_MONITOR@',
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rate: 48000,
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channels: 2,
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frames: running ? Math.round((Date.now() - startedAt) * 48) : 0,
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blocks: running ? Math.round((Date.now() - startedAt) / 10.7) : 0,
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timeouts: 0,
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uptimeMs: running ? Date.now() - startedAt : 0,
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},
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levels: {
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peak: peak,
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rms: peak * 0.6,
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peakDb: peak > 0 ? 20 * Math.log(peak) / Math.LN10 : -90,
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rmsDb: peak > 0 ? 20 * Math.log(peak * 0.6) / Math.LN10 : -90,
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clipping: peak > 0.98,
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bands: bands,
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},
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sinks: running ? settings.sinks.map(function (id) {
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return { id: id, ok: true, name: id, error: null, target: settings.hyperhdr.host, port: settings.hyperhdr.port, packetsSent: 1234 };
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}) : [],
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configPath: '/var/lib/webosbrew/audiocap/config.json',
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configPersistent: true,
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};
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}
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setInterval(function () {
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subscribers.forEach(function (s) {
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if (!s.cancelled) {
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s.onReply(status(true));
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}
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});
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}, 100);
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function respond(onReply, payload) {
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setTimeout(function () { onReply(payload); }, 30);
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return { cancel: function () {} };
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}
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var LunaMock = {
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call: function (uri, params, onReply, onError) {
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var method = uri.split('/').pop();
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switch (method) {
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case 'start':
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if (params && Object.keys(params).length) { merge(settings, params); }
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running = true;
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startedAt = Date.now();
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return respond(onReply, status(false));
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case 'stop':
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running = false;
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return respond(onReply, status(false));
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case 'getStatus': {
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var sub = { cancelled: false, onReply: onReply };
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if (params && params.subscribe) {
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subscribers.push(sub);
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}
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setTimeout(function () { onReply(status(!!(params && params.subscribe))); }, 30);
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return { cancel: function () { sub.cancelled = true; } };
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}
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case 'getConfig':
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return respond(onReply, {
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returnValue: true,
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path: '/var/lib/webosbrew/audiocap/config.json',
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persistent: true,
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settings: JSON.parse(JSON.stringify(settings)),
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});
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case 'setConfig':
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merge(settings, params.settings || params);
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return respond(onReply, {
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returnValue: true, saved: true, restartRequired: running,
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settings: JSON.parse(JSON.stringify(settings)),
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});
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case 'listBackends':
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return respond(onReply, {
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returnValue: true,
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backends: [
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{ id: 'pulse', name: 'PulseAudio', description: 'Records a PulseAudio monitor source.', available: true },
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{ id: 'alsa', name: 'ALSA', description: 'Records from an ALSA capture PCM.', available: true },
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{ id: 'exec', name: 'External command', description: 'Reads raw PCM from a command you supply.', available: true },
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{ id: 'tone', name: 'Test tone', description: 'Synthesised sweep, for testing the transport.', available: true },
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],
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});
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case 'listSinks':
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return respond(onReply, {
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returnValue: true,
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sinks: [
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{ id: 'hyperhdr', name: 'HyperHDR audio (RTP)', description: 'RTP/L16 audio to the HyperHDR host.' },
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{ id: 'hyperhdrViz', name: 'HyperHDR visualiser', description: 'Renders on the TV, sends images. No host setup.' },
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{ id: 'udp', name: 'Raw PCM over UDP', description: 'Fire-and-forget S16LE datagrams.' },
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{ id: 'tcp', name: 'Raw PCM over TCP', description: 'The TV listens; connect to pull audio.' },
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{ id: 'http', name: 'HTTP WAV stream', description: 'Open the URL in VLC.' },
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],
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});
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// Same shape as capture_write_diagnostics(): backends at the top level,
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// everything about the machine under "system".
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case 'getDiagnostics':
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return respond(onReply, {
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returnValue: true,
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backends: [
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{ id: 'pulse', name: 'PulseAudio monitor', available: true },
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{ id: 'alsa', name: 'ALSA PCM', available: true },
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{ id: 'exec', name: 'External command', available: true },
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{ id: 'tone', name: 'Test tone', available: true },
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],
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system: {
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root: true,
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uid: 0,
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libraries: {
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'libpulse.so.0': '/usr/lib/libpulse.so.0',
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'libpulse-simple.so.0': null,
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'libasound.so.2': '/usr/lib/libasound.so.2',
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},
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binaries: { parec: false, pactl: true, pacat: false, arecord: true },
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pulseSockets: ['/var/run/pulse/native'],
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pactlSources: 'mock output',
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alsaCards: ['0 [Loopback]: Loopback - Loopback'],
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alsaCapturePcms: ['00-01: Loopback PCM : playback 1 : capture 1'],
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},
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});
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case 'getLogs':
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return respond(onReply, {
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returnValue: true,
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logs: '[info] running in the browser mock\n[info] no TV attached\n',
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});
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case 'quit':
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running = false;
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return respond(onReply, { returnValue: true });
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case 'exec':
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return respond(onReply, { returnValue: true, stdoutString: '' });
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default:
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if (onError) { onError('mock: unknown method ' + method); }
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return { cancel: function () {} };
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}
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},
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};
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global.LunaMock = LunaMock;
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})(window);
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