d3661adf46
- Introduce a new user script `audio-track-probe.js` that probes WebRTC audio input/output tracks and displays active RTP statistics. - Implement functionality to manage audio track candidates, including live audio detection and audio level analysis. - Enhance logging features to provide real-time feedback on audio track status and metrics. - Integrate audio context management for improved audio visualization and monitoring capabilities.
653 lines
27 KiB
JavaScript
653 lines
27 KiB
JavaScript
// ==UserScript==
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// @name 12345 Audio Track Probe
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// @namespace http://tampermonkey.net/
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// @version 1.0
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// @description Probe page/WebRTC audio input/output tracks and show active RTP stats.
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// @author You
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// @match *://yhy-yw.22sj.cn:*/*
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// @grant none
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// @run-at document-start
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// ==/UserScript==
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(function () {
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'use strict';
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const originalAddEventListener = RTCPeerConnection.prototype.addEventListener;
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const originalAddTrack = RTCPeerConnection.prototype.addTrack;
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const originalAddTransceiver = RTCPeerConnection.prototype.addTransceiver;
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const originalSetRemoteDescription = RTCPeerConnection.prototype.setRemoteDescription;
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const mediaSrcObjectDescriptor = Object.getOwnPropertyDescriptor(HTMLMediaElement.prototype, 'srcObject');
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const candidates = new Map();
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const senderCandidates = new Map();
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const receivers = new Set();
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const senders = new Set();
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const statMemory = new Map();
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const outboundStatMemory = new Map();
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let selectedTrackId = null;
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let selectedSenderId = null;
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let lastPanelRenderAt = 0;
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let senderAudioContext = null;
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function nowText() {
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return new Date().toLocaleTimeString([], { hour12: false });
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}
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function isLiveAudioTrack(track) {
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return track?.kind === 'audio' && track.readyState === 'live';
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}
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function shortId(id) {
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if (!id) return 'none';
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if (id.length <= 18) return id;
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return `${id.slice(0, 8)}...${id.slice(-6)}`;
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}
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function speechLevel(level) {
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if (!Number.isFinite(level) || level < 0.0015) return 0;
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return level;
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}
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function volumePercent(level) {
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return Math.round(Math.min(100, speechLevel(level) * 2500));
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}
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function volumeDb(level) {
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const activeLevel = speechLevel(level);
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if (!activeLevel) return '-inf';
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return `${(20 * Math.log10(activeLevel)).toFixed(1)}dB`;
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}
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function volumeText(level) {
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return `vol=${volumePercent(level)}% ${volumeDb(level)}`;
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}
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function createAudioContext() {
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const AudioContextCtor = window.AudioContext || window.webkitAudioContext;
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return AudioContextCtor ? new AudioContextCtor() : null;
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}
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function analyserLevel(analyser, data) {
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if (!analyser || !data) return 0;
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analyser.getByteTimeDomainData(data);
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let sum = 0;
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for (const value of data) {
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const centered = (value - 128) / 128;
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sum += centered * centered;
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}
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return Math.sqrt(sum / data.length);
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}
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async function ensureSenderMeter(candidate) {
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const track = candidate?.track;
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if (!isLiveAudioTrack(track)) {
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detachSenderMeter(candidate);
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return false;
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}
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if (candidate.meterTrack === track && candidate.analyser) return true;
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detachSenderMeter(candidate);
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if (!senderAudioContext) {
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senderAudioContext = createAudioContext();
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if (!senderAudioContext) {
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candidate.sources.add('meter-error:no-audio-context');
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return false;
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}
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}
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if (senderAudioContext.state === 'suspended') {
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await senderAudioContext.resume().catch(() => {});
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}
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try {
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const stream = new MediaStream([track]);
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candidate.meterSource = senderAudioContext.createMediaStreamSource(stream);
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candidate.analyser = senderAudioContext.createAnalyser();
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candidate.analyser.fftSize = 512;
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candidate.analyser.smoothingTimeConstant = 0.55;
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candidate.meterData = new Uint8Array(candidate.analyser.fftSize);
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candidate.meterSource.connect(candidate.analyser);
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candidate.meterTrack = track;
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return true;
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} catch (error) {
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candidate.sources.add(`meter-error:${error.message || error}`);
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detachSenderMeter(candidate);
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return false;
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}
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}
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function detachSenderMeter(candidate) {
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if (!candidate) return;
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try {
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candidate.meterSource?.disconnect();
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} catch {}
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candidate.meterSource = null;
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candidate.analyser = null;
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candidate.meterData = null;
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candidate.meterTrack = null;
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}
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function refreshSenderMeterLevel(candidate) {
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if (!candidate) return;
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candidate.audioLevel = analyserLevel(candidate.analyser, candidate.meterData);
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}
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function log(message) {
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console.log(`[Audio Track Probe] ${message}`);
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const box = document.getElementById('audio-track-probe-log');
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if (!box) return;
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const row = document.createElement('div');
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row.textContent = `[${nowText()}] ${message}`;
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box.appendChild(row);
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while (box.children.length > 80) box.removeChild(box.firstChild);
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box.scrollTop = box.scrollHeight;
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}
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function ensureCandidate(track, source) {
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if (!isLiveAudioTrack(track)) return null;
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let candidate = candidates.get(track.id);
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if (!candidate) {
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candidate = {
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track,
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receiver: null,
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sources: new Set(),
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elements: new Set(),
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firstSeenAt: Date.now(),
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lastSeenAt: Date.now(),
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bytesReceived: 0,
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packetsReceived: 0,
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bytesDelta: 0,
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packetsDelta: 0,
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audioLevel: 0,
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energyLevel: 0,
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score: 0,
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};
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candidates.set(track.id, candidate);
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log(`found audio track ${track.id} (${source})`);
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}
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candidate.track = track;
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candidate.sources.add(source);
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candidate.lastSeenAt = Date.now();
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return candidate;
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}
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function ensureSenderCandidate(sender, track, source) {
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if (!sender) return null;
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const senderTrack = track || sender.track;
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if (senderTrack && senderTrack.kind !== 'audio') return null;
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const id = sender.__audioTrackProbeId || `sender-${senderCandidates.size + 1}`;
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sender.__audioTrackProbeId = id;
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let candidate = senderCandidates.get(id);
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if (!candidate) {
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candidate = {
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id,
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sender,
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track: senderTrack || null,
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sources: new Set(),
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firstSeenAt: Date.now(),
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lastSeenAt: Date.now(),
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bytesSent: 0,
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packetsSent: 0,
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bytesDelta: 0,
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packetsDelta: 0,
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audioLevel: 0,
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analyser: null,
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meterData: null,
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meterSource: null,
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meterTrack: null,
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score: 0,
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};
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senderCandidates.set(id, candidate);
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log(`found audio sender ${id} (${source}) track=${senderTrack?.id || 'null'}`);
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}
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candidate.sender = sender;
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candidate.track = senderTrack || sender.track || candidate.track;
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candidate.sources.add(source);
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candidate.lastSeenAt = Date.now();
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ensureSenderMeter(candidate);
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senders.add(sender);
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wrapSender(sender);
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return candidate;
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}
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function wrapSender(sender) {
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if (!sender || sender.__audioTrackProbeWrapped) return;
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const originalReplaceTrack = sender.replaceTrack?.bind(sender);
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if (!originalReplaceTrack) return;
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sender.replaceTrack = async function (track) {
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const result = await originalReplaceTrack(track);
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if (!track || track.kind === 'audio') {
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const candidate = ensureSenderCandidate(sender, track, 'replaceTrack');
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if (candidate) {
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candidate.track = track;
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ensureSenderMeter(candidate);
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log(`sender ${candidate.id} replaceTrack -> ${track?.id || 'null'}`);
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}
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}
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return result;
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};
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sender.__audioTrackProbeWrapped = true;
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}
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function rememberReceiver(receiver, source) {
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if (!receiver?.track || !isLiveAudioTrack(receiver.track)) return;
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receivers.add(receiver);
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const candidate = ensureCandidate(receiver.track, source);
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if (candidate) candidate.receiver = receiver;
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}
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function rememberStream(stream, source, element) {
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if (!stream || !(stream instanceof MediaStream)) return;
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for (const track of stream.getAudioTracks()) {
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const candidate = ensureCandidate(track, source);
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if (candidate && element) candidate.elements.add(element);
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}
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}
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function scanMediaElements() {
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document.querySelectorAll('audio, video').forEach((element, index) => {
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rememberStream(element.srcObject, `element-${index}:${element.tagName.toLowerCase()}`, element);
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});
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}
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function levelFromStat(stat, candidate) {
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let level = typeof stat.audioLevel === 'number' ? stat.audioLevel : 0;
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if (typeof stat.totalAudioEnergy !== 'number' || typeof stat.totalSamplesDuration !== 'number') {
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return level;
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}
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const prev = statMemory.get(stat.id);
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statMemory.set(stat.id, {
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bytes: stat.bytesReceived || 0,
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packets: stat.packetsReceived || 0,
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energy: stat.totalAudioEnergy,
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duration: stat.totalSamplesDuration,
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});
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if (prev) {
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const energyDelta = stat.totalAudioEnergy - prev.energy;
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const durationDelta = stat.totalSamplesDuration - prev.duration;
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if (energyDelta > 0 && durationDelta > 0) {
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level = Math.max(level, Math.sqrt(energyDelta / durationDelta));
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}
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}
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candidate.energyLevel = level;
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return level;
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}
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async function refreshStats() {
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for (const receiver of Array.from(receivers)) {
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if (!receiver.track || receiver.track.readyState !== 'live') {
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receivers.delete(receiver);
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continue;
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}
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const candidate = ensureCandidate(receiver.track, 'receiver-stats');
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if (!candidate || !receiver.getStats) continue;
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candidate.receiver = receiver;
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try {
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const report = await receiver.getStats();
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report.forEach((stat) => {
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const kind = stat.kind || stat.mediaType;
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if (stat.type !== 'inbound-rtp' || kind !== 'audio') return;
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const prev = statMemory.get(stat.id);
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const bytes = stat.bytesReceived || 0;
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const packets = stat.packetsReceived || 0;
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candidate.bytesDelta = prev ? Math.max(0, bytes - prev.bytes) : 0;
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candidate.packetsDelta = prev ? Math.max(0, packets - prev.packets) : 0;
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candidate.bytesReceived = bytes;
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candidate.packetsReceived = packets;
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candidate.audioLevel = levelFromStat(stat, candidate);
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});
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} catch (error) {
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candidate.sources.add(`stats-error:${error.message || error}`);
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}
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}
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chooseActiveTrack();
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await refreshSenderStats();
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chooseActiveSender();
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}
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async function refreshSenderStats() {
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for (const sender of Array.from(senders)) {
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if (!sender) {
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senders.delete(sender);
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continue;
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}
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const candidate = ensureSenderCandidate(sender, sender.track, 'sender-stats');
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if (!candidate || !sender.getStats) continue;
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await ensureSenderMeter(candidate);
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refreshSenderMeterLevel(candidate);
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try {
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const report = await sender.getStats();
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report.forEach((stat) => {
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const kind = stat.kind || stat.mediaType;
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if (stat.type !== 'outbound-rtp' || kind !== 'audio') return;
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const prev = outboundStatMemory.get(stat.id);
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const bytes = stat.bytesSent || 0;
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const packets = stat.packetsSent || 0;
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candidate.bytesDelta = prev ? Math.max(0, bytes - prev.bytes) : 0;
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candidate.packetsDelta = prev ? Math.max(0, packets - prev.packets) : 0;
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candidate.bytesSent = bytes;
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candidate.packetsSent = packets;
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if (!candidate.analyser && typeof stat.audioLevel === 'number') {
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candidate.audioLevel = stat.audioLevel;
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}
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outboundStatMemory.set(stat.id, { bytes, packets });
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});
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} catch (error) {
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candidate.sources.add(`sender-stats-error:${error.message || error}`);
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}
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}
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}
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function scoreCandidate(candidate) {
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if (!candidate || !isLiveAudioTrack(candidate.track)) return -1;
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let score = 0;
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if (!candidate.track.muted) score += 1000;
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if (candidate.receiver) score += 300;
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if (candidate.bytesDelta > 0) score += 4000 + Math.min(1500, candidate.bytesDelta);
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if (candidate.packetsDelta > 0) score += 2000 + Math.min(800, candidate.packetsDelta * 8);
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score += Math.min(1200, candidate.audioLevel * 12000);
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if (candidate.elements.size > 0) score += 100;
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return score;
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}
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function chooseActiveTrack() {
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let best = null;
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for (const candidate of candidates.values()) {
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candidate.score = scoreCandidate(candidate);
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if (!best || candidate.score > best.score) best = candidate;
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}
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if (!best || best.score < 0) return;
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if (best.track.id !== selectedTrackId) {
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selectedTrackId = best.track.id;
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log(`active audio looks like ${best.track.id}, score=${Math.round(best.score)}`);
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}
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}
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function scoreSenderCandidate(candidate) {
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if (!candidate) return -1;
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let score = 0;
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if (candidate.track?.readyState === 'live') score += 1000;
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if (candidate.track && !candidate.track.muted) score += 400;
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if (candidate.bytesSent > 0) score += 300;
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if (candidate.bytesDelta > 0) score += 4500 + Math.min(1800, candidate.bytesDelta);
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if (candidate.packetsDelta > 0) score += 1800 + Math.min(900, candidate.packetsDelta * 10);
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score += Math.min(1000, candidate.audioLevel * 10000);
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return score;
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}
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function chooseActiveSender() {
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let best = null;
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for (const candidate of senderCandidates.values()) {
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candidate.score = scoreSenderCandidate(candidate);
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if (!best || candidate.score > best.score) best = candidate;
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}
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if (!best || best.score < 0) return;
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if (best.id !== selectedSenderId) {
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selectedSenderId = best.id;
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log(`active output sender looks like ${best.id}, track=${best.track?.id || 'null'}, score=${Math.round(best.score)}`);
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}
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}
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function dumpInputs() {
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return Array.from(candidates.values())
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.sort((a, b) => b.score - a.score)
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.map((candidate) => ({
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selected: candidate.track.id === selectedTrackId,
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id: candidate.track.id,
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label: candidate.track.label,
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enabled: candidate.track.enabled,
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muted: candidate.track.muted,
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readyState: candidate.track.readyState,
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hasReceiver: Boolean(candidate.receiver),
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bytesReceived: candidate.bytesReceived,
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packetsReceived: candidate.packetsReceived,
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bytesDelta: candidate.bytesDelta,
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packetsDelta: candidate.packetsDelta,
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audioLevel: candidate.audioLevel,
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volumePercent: volumePercent(candidate.audioLevel),
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volumeDb: volumeDb(candidate.audioLevel),
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score: Math.round(candidate.score),
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sources: Array.from(candidate.sources),
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elements: Array.from(candidate.elements).map((element) => ({
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tag: element.tagName,
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paused: element.paused,
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muted: element.muted,
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volume: element.volume,
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})),
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}));
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}
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function dumpOutputs() {
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return Array.from(senderCandidates.values())
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.sort((a, b) => b.score - a.score)
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.map((candidate) => ({
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selected: candidate.id === selectedSenderId,
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id: candidate.id,
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trackId: candidate.track?.id || null,
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trackLabel: candidate.track?.label || null,
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trackEnabled: candidate.track?.enabled ?? null,
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trackMuted: candidate.track?.muted ?? null,
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trackReadyState: candidate.track?.readyState || null,
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bytesSent: candidate.bytesSent,
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packetsSent: candidate.packetsSent,
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bytesDelta: candidate.bytesDelta,
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packetsDelta: candidate.packetsDelta,
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audioLevel: candidate.audioLevel,
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volumePercent: volumePercent(candidate.audioLevel),
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volumeDb: volumeDb(candidate.audioLevel),
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score: Math.round(candidate.score),
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sources: Array.from(candidate.sources),
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}));
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}
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function dump() {
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return {
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selectedInputTrackId: selectedTrackId,
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selectedOutputSenderId: selectedSenderId,
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inputs: dumpInputs(),
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outputs: dumpOutputs(),
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};
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}
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function renderPanel() {
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if (!document.body) return;
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let panel = document.getElementById('audio-track-probe-panel');
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if (!panel) {
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panel = document.createElement('div');
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panel.id = 'audio-track-probe-panel';
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panel.style.cssText = [
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'position:fixed',
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'top:20px',
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'right:20px',
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'width:460px',
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'max-height:70vh',
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'z-index:999999',
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'box-sizing:border-box',
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'padding:12px',
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'border-radius:8px',
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'background:rgba(3,7,18,.96)',
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'color:#e5e7eb',
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'font:12px ui-monospace,Menlo,monospace',
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'box-shadow:0 12px 32px rgba(0,0,0,.35)',
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'overflow:auto',
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].join(';');
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panel.innerHTML = `
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<div style="display:flex;justify-content:space-between;align-items:center;margin-bottom:8px;">
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<strong style="color:#93c5fd;font:13px system-ui,sans-serif;">Audio Track Probe</strong>
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<button id="audio-track-probe-copy" style="border:0;border-radius:5px;padding:5px 8px;background:#2563eb;color:white;cursor:pointer;">copy dump</button>
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</div>
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<div id="audio-track-probe-summary" style="margin-bottom:8px;color:#d1d5db;"></div>
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<div style="color:#93c5fd;margin:8px 0 4px;">Input receivers</div>
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<div id="audio-track-probe-list"></div>
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<div style="color:#c084fc;margin:10px 0 4px;">Output senders</div>
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<div id="audio-track-probe-output-list"></div>
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<div id="audio-track-probe-log" style="margin-top:8px;height:90px;overflow:auto;border-top:1px solid #374151;padding-top:6px;color:#a7f3d0;"></div>
|
|
`;
|
|
document.body.appendChild(panel);
|
|
document.getElementById('audio-track-probe-copy').addEventListener('click', async () => {
|
|
const text = JSON.stringify(window.__audioTrackProbeDump(), null, 2);
|
|
await navigator.clipboard?.writeText(text).catch(() => {});
|
|
console.log('[Audio Track Probe dump]', text);
|
|
log('dump copied to clipboard and console');
|
|
});
|
|
}
|
|
|
|
const rows = dumpInputs();
|
|
const outputRows = dumpOutputs();
|
|
const selected = rows.find((row) => row.selected);
|
|
const selectedOutput = outputRows.find((row) => row.selected);
|
|
document.getElementById('audio-track-probe-summary').textContent =
|
|
`inputs=${rows.length}, selected=${selected ? selected.id : 'none'} | outputs=${outputRows.length}, selected=${selectedOutput ? selectedOutput.id : 'none'}, time=${nowText()}`;
|
|
|
|
document.getElementById('audio-track-probe-list').innerHTML = rows.map((row) => {
|
|
const pct = row.volumePercent;
|
|
const color = row.selected ? '#fcd34d' : '#9ca3af';
|
|
return `
|
|
<div style="border:1px solid ${row.selected ? '#f59e0b' : '#374151'};border-radius:6px;padding:8px;margin-bottom:6px;">
|
|
<div style="display:flex;justify-content:space-between;gap:8px;color:${color};">
|
|
<span>${row.selected ? '*' : '-'} ${shortId(row.id)}</span>
|
|
<span>${volumeText(row.audioLevel)} score=${row.score}</span>
|
|
</div>
|
|
<div style="height:6px;background:#374151;border-radius:999px;overflow:hidden;margin:6px 0;">
|
|
<div style="height:100%;width:${pct}%;opacity:${pct > 0 ? 1 : 0.35};background:linear-gradient(90deg,#10b981,#fcd34d);"></div>
|
|
</div>
|
|
<div style="color:#cbd5e1;line-height:1.45;">
|
|
muted=${row.muted} receiver=${row.hasReceiver} bytesDelta=${row.bytesDelta} packetsDelta=${row.packetsDelta} level=${row.audioLevel.toFixed(5)}
|
|
</div>
|
|
<div style="color:#94a3b8;word-break:break-all;">${row.sources.join(', ')}</div>
|
|
</div>
|
|
`;
|
|
}).join('');
|
|
|
|
document.getElementById('audio-track-probe-output-list').innerHTML = outputRows.map((row) => {
|
|
const pct = row.volumePercent;
|
|
const color = row.selected ? '#c084fc' : '#9ca3af';
|
|
return `
|
|
<div style="border:1px solid ${row.selected ? '#a855f7' : '#374151'};border-radius:6px;padding:8px;margin-bottom:6px;">
|
|
<div style="display:flex;justify-content:space-between;gap:8px;color:${color};">
|
|
<span>${row.selected ? '*' : '-'} ${row.id}</span>
|
|
<span>${volumeText(row.audioLevel)} score=${row.score}</span>
|
|
</div>
|
|
<div style="height:6px;background:#374151;border-radius:999px;overflow:hidden;margin:6px 0;">
|
|
<div style="height:100%;width:${pct}%;opacity:${pct > 0 ? 1 : 0.35};background:linear-gradient(90deg,#60a5fa,#c084fc);"></div>
|
|
</div>
|
|
<div style="color:#cbd5e1;line-height:1.45;">
|
|
track=${shortId(row.trackId)} muted=${row.trackMuted} bytesDelta=${row.bytesDelta} packetsDelta=${row.packetsDelta} level=${Number(row.audioLevel || 0).toFixed(5)}
|
|
</div>
|
|
<div style="color:#94a3b8;word-break:break-all;">${row.sources.join(', ')}</div>
|
|
</div>
|
|
`;
|
|
}).join('');
|
|
}
|
|
|
|
function wrapTrackListener(listener) {
|
|
if (!listener || listener.__audioTrackProbeWrapped) return listener;
|
|
const wrapped = function (event) {
|
|
rememberReceiver(event?.receiver, 'pc-track');
|
|
if (typeof listener === 'function') return listener.apply(this, arguments);
|
|
if (listener?.handleEvent) return listener.handleEvent(event);
|
|
return undefined;
|
|
};
|
|
wrapped.__audioTrackProbeWrapped = true;
|
|
return wrapped;
|
|
}
|
|
|
|
RTCPeerConnection.prototype.addEventListener = function (type, listener, options) {
|
|
if (type === 'track') return originalAddEventListener.call(this, type, wrapTrackListener(listener), options);
|
|
return originalAddEventListener.call(this, type, listener, options);
|
|
};
|
|
|
|
RTCPeerConnection.prototype.addTrack = function (track, ...streams) {
|
|
const sender = originalAddTrack.call(this, track, ...streams);
|
|
if (track?.kind === 'audio') ensureSenderCandidate(sender, track, 'pc-addTrack');
|
|
return sender;
|
|
};
|
|
|
|
if (originalAddTransceiver) {
|
|
RTCPeerConnection.prototype.addTransceiver = function (trackOrKind, init) {
|
|
const transceiver = originalAddTransceiver.call(this, trackOrKind, init);
|
|
const kind = trackOrKind instanceof MediaStreamTrack ? trackOrKind.kind : trackOrKind;
|
|
if (kind === 'audio') {
|
|
const track = trackOrKind instanceof MediaStreamTrack ? trackOrKind : transceiver.sender?.track;
|
|
ensureSenderCandidate(transceiver.sender, track, 'pc-addTransceiver');
|
|
}
|
|
return transceiver;
|
|
};
|
|
}
|
|
|
|
try {
|
|
const descriptor = Object.getOwnPropertyDescriptor(RTCPeerConnection.prototype, 'ontrack');
|
|
Object.defineProperty(RTCPeerConnection.prototype, 'ontrack', {
|
|
configurable: true,
|
|
enumerable: true,
|
|
get() {
|
|
return descriptor?.get ? descriptor.get.call(this) : this.__audioTrackProbeOnTrack || null;
|
|
},
|
|
set(listener) {
|
|
const wrapped = wrapTrackListener(listener);
|
|
this.__audioTrackProbeOnTrack = wrapped;
|
|
if (descriptor?.set) descriptor.set.call(this, wrapped);
|
|
else this.addEventListener('track', wrapped);
|
|
},
|
|
});
|
|
} catch (error) {
|
|
console.warn('[Audio Track Probe] failed to wrap ontrack', error);
|
|
}
|
|
|
|
RTCPeerConnection.prototype.setRemoteDescription = function () {
|
|
const result = originalSetRemoteDescription.apply(this, arguments);
|
|
Promise.resolve(result).then(() => {
|
|
try {
|
|
for (const receiver of this.getReceivers?.() || []) rememberReceiver(receiver, 'receiver-after-srd');
|
|
for (const sender of this.getSenders?.() || []) ensureSenderCandidate(sender, sender.track, 'sender-after-srd');
|
|
} catch (error) {
|
|
console.warn('[Audio Track Probe] failed to scan receivers', error);
|
|
}
|
|
});
|
|
return result;
|
|
};
|
|
|
|
if (mediaSrcObjectDescriptor?.set) {
|
|
Object.defineProperty(HTMLMediaElement.prototype, 'srcObject', {
|
|
configurable: true,
|
|
enumerable: mediaSrcObjectDescriptor.enumerable,
|
|
get() {
|
|
return mediaSrcObjectDescriptor.get.call(this);
|
|
},
|
|
set(stream) {
|
|
rememberStream(stream, `${this.tagName.toLowerCase()}-srcObject`, this);
|
|
return mediaSrcObjectDescriptor.set.call(this, stream);
|
|
},
|
|
});
|
|
}
|
|
|
|
window.__audioTrackProbeDump = dump;
|
|
|
|
setInterval(scanMediaElements, 500);
|
|
setInterval(refreshStats, 250);
|
|
setInterval(() => {
|
|
if (Date.now() - lastPanelRenderAt < 500) return;
|
|
lastPanelRenderAt = Date.now();
|
|
renderPanel();
|
|
}, 250);
|
|
|
|
if (document.readyState === 'loading') {
|
|
document.addEventListener('DOMContentLoaded', renderPanel, { once: true });
|
|
} else {
|
|
renderPanel();
|
|
}
|
|
})();
|