Remove browser call-in page
This commit is contained in:
@@ -1,293 +0,0 @@
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/**
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* Call-In Page — Browser WebSocket audio streaming
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* Captures mic via AudioWorklet, sends Int16 PCM 16kHz mono over WebSocket.
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* Receives Int16 PCM 16kHz mono back for playback.
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*/
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let ws = null;
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let audioCtx = null;
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let micStream = null;
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let workletNode = null;
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let playbackNode = null;
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let callerId = null;
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const callBtn = document.getElementById('call-btn');
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const hangupBtn = document.getElementById('hangup-btn');
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const statusEl = document.getElementById('status');
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const statusText = document.getElementById('status-text');
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const nameInput = document.getElementById('caller-name');
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const micMeter = document.getElementById('mic-meter');
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const micMeterFill = document.getElementById('mic-meter-fill');
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callBtn.addEventListener('click', startCall);
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hangupBtn.addEventListener('click', hangUp);
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nameInput.addEventListener('keydown', e => {
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if (e.key === 'Enter') startCall();
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});
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async function startCall() {
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const name = nameInput.value.trim() || 'Anonymous';
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callBtn.disabled = true;
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setStatus('Connecting...', false);
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try {
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// Get mic access
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micStream = await navigator.mediaDevices.getUserMedia({
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audio: { echoCancellation: true, noiseSuppression: true, sampleRate: 16000 }
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});
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// Set up AudioContext
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audioCtx = new AudioContext({ sampleRate: 48000 });
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// Register worklet processors inline via blob
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const processorCode = `
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// --- Capture processor: downsample to 16kHz, emit small chunks ---
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class CallerProcessor extends AudioWorkletProcessor {
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constructor() {
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super();
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this.buffer = [];
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this.targetSamples = 960; // 60ms at 16kHz
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}
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process(inputs) {
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const input = inputs[0][0];
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if (!input) return true;
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// Downsample with averaging (anti-aliased)
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const step = Math.floor(sampleRate / 16000);
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for (let i = 0; i + step <= input.length; i += step) {
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let sum = 0;
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for (let j = 0; j < step; j++) {
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sum += input[i + j];
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}
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this.buffer.push(sum / step);
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}
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while (this.buffer.length >= this.targetSamples) {
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const chunk = this.buffer.splice(0, this.targetSamples);
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const int16 = new Int16Array(chunk.length);
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for (let i = 0; i < chunk.length; i++) {
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const s = Math.max(-1, Math.min(1, chunk[i]));
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int16[i] = s < 0 ? s * 32768 : s * 32767;
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}
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this.port.postMessage(int16.buffer, [int16.buffer]);
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}
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return true;
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}
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}
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registerProcessor('caller-processor', CallerProcessor);
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// --- Playback processor: ring buffer with 16kHz->sampleRate upsampling ---
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class PlaybackProcessor extends AudioWorkletProcessor {
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constructor() {
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super();
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this.ringSize = 16000 * 10; // 10s ring buffer at 16kHz
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this.ring = new Float32Array(this.ringSize);
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this.writePos = 0;
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this.readPos = 0;
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this.available = 0;
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this.started = false;
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this.jitterMs = 100; // buffer 100ms before starting playback
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this.jitterSamples = Math.floor(16000 * this.jitterMs / 1000);
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this.port.onmessage = (e) => {
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const data = e.data;
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for (let i = 0; i < data.length; i++) {
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this.ring[this.writePos] = data[i];
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this.writePos = (this.writePos + 1) % this.ringSize;
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}
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this.available += data.length;
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if (this.available > this.ringSize) {
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// Overflow — skip ahead
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this.available = this.ringSize;
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this.readPos = (this.writePos - this.ringSize + this.ringSize) % this.ringSize;
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}
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};
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}
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process(inputs, outputs) {
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const output = outputs[0][0];
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if (!output) return true;
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// Wait for jitter buffer to fill before starting
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if (!this.started) {
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if (this.available < this.jitterSamples) {
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output.fill(0);
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return true;
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}
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this.started = true;
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}
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const ratio = 16000 / sampleRate;
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const srcNeeded = Math.ceil(output.length * ratio);
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if (this.available >= srcNeeded) {
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for (let i = 0; i < output.length; i++) {
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const srcPos = i * ratio;
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const idx = Math.floor(srcPos);
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const frac = srcPos - idx;
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const p0 = (this.readPos + idx) % this.ringSize;
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const p1 = (p0 + 1) % this.ringSize;
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output[i] = this.ring[p0] * (1 - frac) + this.ring[p1] * frac;
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}
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this.readPos = (this.readPos + srcNeeded) % this.ringSize;
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this.available -= srcNeeded;
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} else {
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// Underrun — silence, reset jitter buffer
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output.fill(0);
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this.started = false;
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}
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return true;
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}
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}
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registerProcessor('playback-processor', PlaybackProcessor);
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`;
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const blob = new Blob([processorCode], { type: 'application/javascript' });
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const blobUrl = URL.createObjectURL(blob);
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await audioCtx.audioWorklet.addModule(blobUrl);
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URL.revokeObjectURL(blobUrl);
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// Connect mic to worklet
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const source = audioCtx.createMediaStreamSource(micStream);
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workletNode = new AudioWorkletNode(audioCtx, 'caller-processor');
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// Connect WebSocket
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const proto = location.protocol === 'https:' ? 'wss:' : 'ws:';
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ws = new WebSocket(`${proto}//${location.host}/api/caller/stream`);
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ws.binaryType = 'arraybuffer';
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ws.onopen = () => {
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ws.send(JSON.stringify({ type: 'join', name }));
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};
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ws.onmessage = (event) => {
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if (typeof event.data === 'string') {
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handleControlMessage(JSON.parse(event.data));
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} else {
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handleAudioData(event.data);
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}
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};
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ws.onclose = () => {
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setStatus('Disconnected', false);
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cleanup();
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};
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ws.onerror = () => {
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setStatus('Connection error', false);
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cleanup();
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};
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// Forward mic audio to WebSocket
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workletNode.port.onmessage = (e) => {
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if (ws && ws.readyState === WebSocket.OPEN) {
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ws.send(e.data);
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}
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};
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source.connect(workletNode);
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// Don't connect worklet to destination — we don't want to hear our own mic
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// Set up playback worklet for received audio
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playbackNode = new AudioWorkletNode(audioCtx, 'playback-processor');
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playbackNode.connect(audioCtx.destination);
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// Show mic meter
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const analyser = audioCtx.createAnalyser();
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analyser.fftSize = 256;
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source.connect(analyser);
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startMicMeter(analyser);
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// UI
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nameInput.disabled = true;
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hangupBtn.style.display = 'block';
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} catch (err) {
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console.error('Call error:', err);
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setStatus('Failed: ' + err.message, false);
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callBtn.disabled = false;
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cleanup();
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}
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}
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function handleControlMessage(msg) {
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if (msg.status === 'queued') {
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callerId = msg.caller_id;
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setStatus(`Waiting in queue (position ${msg.position})...`, false);
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} else if (msg.status === 'on_air') {
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setStatus('ON AIR', true);
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} else if (msg.status === 'disconnected') {
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setStatus('Disconnected', false);
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cleanup();
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}
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}
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function handleAudioData(buffer) {
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if (!playbackNode) return;
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// Convert Int16 PCM to Float32 and send to playback worklet
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const int16 = new Int16Array(buffer);
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const float32 = new Float32Array(int16.length);
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for (let i = 0; i < int16.length; i++) {
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float32[i] = int16[i] / 32768;
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}
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playbackNode.port.postMessage(float32, [float32.buffer]);
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}
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function hangUp() {
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if (ws && ws.readyState === WebSocket.OPEN) {
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ws.close();
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}
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setStatus('Disconnected', false);
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cleanup();
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}
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function cleanup() {
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if (workletNode) {
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workletNode.disconnect();
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workletNode = null;
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}
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if (playbackNode) {
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playbackNode.disconnect();
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playbackNode = null;
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}
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if (micStream) {
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micStream.getTracks().forEach(t => t.stop());
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micStream = null;
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}
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if (audioCtx) {
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audioCtx.close().catch(() => {});
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audioCtx = null;
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}
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ws = null;
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callerId = null;
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callBtn.disabled = false;
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nameInput.disabled = false;
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hangupBtn.style.display = 'none';
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micMeter.classList.remove('visible');
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}
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function setStatus(text, isOnAir) {
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statusEl.classList.add('visible');
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statusText.textContent = text;
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if (isOnAir) {
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statusEl.classList.add('on-air');
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} else {
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statusEl.classList.remove('on-air');
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}
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}
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function startMicMeter(analyser) {
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micMeter.classList.add('visible');
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const data = new Uint8Array(analyser.frequencyBinCount);
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function update() {
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if (!analyser || !audioCtx) return;
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analyser.getByteFrequencyData(data);
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let sum = 0;
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for (let i = 0; i < data.length; i++) sum += data[i];
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const avg = sum / data.length;
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const pct = Math.min(100, (avg / 128) * 100);
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micMeterFill.style.width = pct + '%';
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requestAnimationFrame(update);
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}
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update();
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}
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