// --- Persistent settings (localStorage) ---
const STORAGE_PREFIX = "trx_";
function saveSetting(key, value) {
try { localStorage.setItem(STORAGE_PREFIX + key, JSON.stringify(value)); } catch(e) {}
}
function loadSetting(key, fallback) {
try {
const v = localStorage.getItem(STORAGE_PREFIX + key);
return v !== null ? JSON.parse(v) : fallback;
} catch(e) { return fallback; }
}
// --- Authentication ---
let authRole = null; // null (not authenticated), "rx" (read-only), or "control" (full access)
let authEnabled = true;
async function checkAuthStatus() {
try {
const resp = await fetch("/auth/session");
if (resp.status === 404) {
// Auth API not exposed -> treat as auth-disabled mode.
return { authenticated: true, role: "control", auth_disabled: true };
}
if (!resp.ok) return { authenticated: false };
const data = await resp.json();
return data;
} catch (e) {
console.error("Auth check failed:", e);
return { authenticated: false };
}
}
async function authLogin(passphrase) {
try {
const resp = await fetch("/auth/login", {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify({ passphrase }),
});
if (resp.status === 404) {
return { authenticated: true, role: "control", auth_disabled: true };
}
if (!resp.ok) {
const text = await resp.text();
throw new Error(text || "Login failed");
}
const data = await resp.json();
return data;
} catch (e) {
throw e;
}
}
async function authLogout() {
try {
const resp = await fetch("/auth/logout", { method: "POST" });
if (resp.status !== 404 && !resp.ok) throw new Error("Logout failed");
authRole = null;
// Disconnect and show auth gate without page reload
disconnect();
document.getElementById("content").style.display = "none";
document.getElementById("loading").style.display = "none";
document.getElementById("auth-passphrase").value = "";
updateAuthUI();
// Check if guest mode is available after logout
const authStatus = await checkAuthStatus();
const allowGuest = authStatus.role === "rx";
showAuthGate(allowGuest);
} catch (e) {
console.error("Logout failed:", e);
showAuthError("Logout failed");
}
}
function showAuthGate(allowGuest = false) {
if (!authEnabled) return;
document.getElementById("loading").style.display = "none";
document.getElementById("content").style.display = "none";
const authGate = document.getElementById("auth-gate");
authGate.style.display = "flex";
authGate.style.flexDirection = "column";
authGate.style.justifyContent = "center";
authGate.style.alignItems = "stretch";
const overviewStrip = document.querySelector(".overview-strip");
if (overviewStrip) {
overviewStrip.style.display = "none";
}
// Hide all tab panels
document.querySelectorAll(".tab-panel").forEach(panel => {
panel.style.display = "none";
});
// Show guest button if guest mode is available
const guestBtn = document.getElementById("auth-guest-btn");
if (guestBtn) {
guestBtn.style.display = allowGuest ? "block" : "none";
}
document.querySelectorAll(".tab-bar .tab").forEach((btn) => {
btn.classList.toggle("active", btn.dataset.tab === "main");
});
syncTopBarAccess();
}
function hideAuthGate() {
const authGate = document.getElementById("auth-gate");
authGate.style.display = "none";
document.getElementById("loading").style.display = "block";
const overviewStrip = document.querySelector(".overview-strip");
if (overviewStrip) {
overviewStrip.style.display = "";
}
// Show Main tab by default and hide all other tabs
document.querySelectorAll(".tab-panel").forEach(panel => {
panel.style.display = "none";
});
const mainTab = document.getElementById("tab-main");
if (mainTab) {
mainTab.style.display = "";
}
// Mark Main tab button as active
document.querySelectorAll(".tab-bar .tab").forEach(btn => {
btn.classList.remove("active");
});
const mainTabBtn = document.querySelector(".tab-bar .tab[data-tab='main']");
if (mainTabBtn) {
mainTabBtn.classList.add("active");
}
syncTopBarAccess();
}
function showAuthError(msg) {
const el = document.getElementById("auth-error");
el.textContent = msg;
el.style.display = "block";
setTimeout(() => {
el.style.display = "none";
}, 5000);
}
function updateAuthUI() {
const badge = document.getElementById("auth-badge");
const badgeRole = document.getElementById("auth-role-badge");
const headerAuthBtn = document.getElementById("header-auth-btn");
if (!authEnabled) {
if (badge) badge.style.display = "none";
if (headerAuthBtn) headerAuthBtn.style.display = "none";
syncTopBarAccess();
return;
}
if (authRole) {
badge.style.display = "block";
badgeRole.textContent = authRole === "control" ? "Control (full access)" : "RX (read-only)";
if (headerAuthBtn) {
headerAuthBtn.textContent = "Logout";
headerAuthBtn.style.display = "block";
}
} else {
badge.style.display = "none";
if (headerAuthBtn) {
headerAuthBtn.textContent = "Login";
headerAuthBtn.style.display = "block";
}
}
syncTopBarAccess();
}
function applyAuthRestrictions() {
if (!authRole) return;
// Disable TX/PTT/frequency/mode/VFO controls for rx role
if (authRole === "rx") {
const pttBtn = document.getElementById("ptt-btn");
const powerBtn = document.getElementById("power-btn");
const lockBtn = document.getElementById("lock-btn");
const freqInput = document.getElementById("freq");
const centerFreqInput = document.getElementById("center-freq");
const modeSelect = document.getElementById("mode");
const txLimitInput = document.getElementById("tx-limit");
const txLimitBtn = document.getElementById("tx-limit-btn");
const txAudioBtn = document.getElementById("tx-audio-btn");
const txLimitRow = document.getElementById("tx-limit-row");
const vfoPicker = document.getElementById("vfo-picker");
const jogUp = document.getElementById("jog-up");
const jogDown = document.getElementById("jog-down");
const jogButtons = document.querySelectorAll(".jog-step button");
const vfoButtons = document.querySelectorAll("#vfo-picker button");
// Disable TX buttons
if (pttBtn) pttBtn.disabled = true;
if (powerBtn) powerBtn.disabled = true;
if (lockBtn) lockBtn.disabled = true;
if (txAudioBtn) txAudioBtn.disabled = true;
if (txLimitBtn) txLimitBtn.disabled = true;
// Disable frequency/mode inputs
if (freqInput) freqInput.disabled = true;
if (centerFreqInput) centerFreqInput.disabled = true;
if (modeSelect) modeSelect.disabled = true;
if (txLimitInput) txLimitInput.disabled = true;
// Disable VFO selector
vfoButtons.forEach(btn => btn.disabled = true);
// Disable jog controls
const jogWheel = document.getElementById("jog-wheel");
if (jogUp) jogUp.disabled = true;
if (jogDown) jogDown.disabled = true;
if (jogWheel) jogWheel.style.opacity = "0.5";
jogButtons.forEach(btn => btn.disabled = true);
// Disable plugin enable/disable buttons and decode history clear buttons
// Note: sig-clear-btn is allowed for RX (clears local measurements only)
const pluginToggleBtns = [
"ft8-decode-toggle-btn",
"wspr-decode-toggle-btn",
"cw-auto",
"aprs-clear-btn",
"ft8-clear-btn",
"wspr-clear-btn",
"cw-clear-btn"
];
pluginToggleBtns.forEach(id => {
const btn = document.getElementById(id);
if (btn && btn.tagName === "BUTTON") {
btn.disabled = true;
} else if (btn && btn.type === "checkbox") {
btn.disabled = true;
}
});
// Hide TX-specific UI but keep controls visible (disabled)
if (txLimitRow) txLimitRow.style.opacity = "0.5";
}
}
function applyCapabilities(caps) {
if (!caps) return;
lastHasTx = !!caps.tx;
// PTT / TX controls
const pttBtn = document.getElementById("ptt-btn");
const txPowerCol = document.getElementById("tx-power-col");
const txMetersRow = document.getElementById("tx-meters");
const txAudioBtn = document.getElementById("tx-audio-btn");
const txVolSlider = document.getElementById("tx-vol");
const txVolControl = txVolSlider ? txVolSlider.closest(".vol-label") : null;
if (txPowerCol) txPowerCol.style.display = caps.tx ? "" : "none";
if (pttBtn) pttBtn.style.display = caps.tx ? "" : "none";
if (txMetersRow) txMetersRow.style.display = caps.tx ? "" : "none";
if (txAudioBtn) txAudioBtn.style.display = caps.tx ? "" : "none";
if (txVolControl) txVolControl.style.display = caps.tx ? "" : "none";
if (!caps.tx && typeof stopTxAudio === "function" && txActive) {
stopTxAudio();
}
// TX limit row
const txLimitRow = document.getElementById("tx-limit-row");
if (txLimitRow && !caps.tx_limit) txLimitRow.style.display = "none";
// VFO row
const vfoRow = document.getElementById("vfo-row");
if (vfoRow) vfoRow.style.display = caps.vfo_switch ? "" : "none";
// Signal meter row
document.querySelectorAll(".full-row.label-below-row").forEach(row => {
const label = row.querySelector(".label span");
if (label && label.textContent === "Signal") {
row.style.display = (caps.signal_meter && !caps.filter_controls) ? "" : "none";
}
});
// Spectrum panel (SDR-only)
const spectrumPanel = document.getElementById("spectrum-panel");
const centerFreqField = document.getElementById("center-freq-field");
if (spectrumPanel) {
if (caps.filter_controls) {
spectrumPanel.style.display = "";
if (centerFreqField) centerFreqField.style.display = "";
startSpectrumStreaming();
} else {
spectrumPanel.style.display = "none";
if (centerFreqField) centerFreqField.style.display = "none";
stopSpectrumStreaming();
}
}
}
const freqEl = document.getElementById("freq");
const centerFreqEl = document.getElementById("center-freq");
const wavelengthEl = document.getElementById("wavelength");
const modeEl = document.getElementById("mode");
const bandLabel = document.getElementById("band-label");
const powerBtn = document.getElementById("power-btn");
const powerHint = document.getElementById("power-hint");
const vfoPicker = document.getElementById("vfo-picker");
const signalBar = document.getElementById("signal-bar");
const signalValue = document.getElementById("signal-value");
const pttBtn = document.getElementById("ptt-btn");
const txLimitInput = document.getElementById("tx-limit");
const txLimitBtn = document.getElementById("tx-limit-btn");
const txLimitRow = document.getElementById("tx-limit-row");
const lockBtn = document.getElementById("lock-btn");
const txMeters = document.getElementById("tx-meters");
const pwrBar = document.getElementById("pwr-bar");
const pwrValue = document.getElementById("pwr-value");
const swrBar = document.getElementById("swr-bar");
const swrValue = document.getElementById("swr-value");
const loadingEl = document.getElementById("loading");
const contentEl = document.getElementById("content");
const serverSubtitle = document.getElementById("server-subtitle");
const rigSubtitle = document.getElementById("rig-subtitle");
const ownerSubtitle = document.getElementById("owner-subtitle");
const loadingTitle = document.getElementById("loading-title");
const loadingSub = document.getElementById("loading-sub");
const overviewCanvas = document.getElementById("overview-canvas");
const overviewPeakHoldEl = document.getElementById("overview-peak-hold");
const themeToggleBtn = document.getElementById("theme-toggle");
const headerRigSwitchSelect = document.getElementById("header-rig-switch-select");
const headerStylePickSelect = document.getElementById("header-style-pick-select");
const rdsPsOverlay = document.getElementById("rds-ps-overlay");
let overviewPeakHoldMs = Number(loadSetting("overviewPeakHoldMs", 2000));
function syncTopBarAccess() {
const loggedOut = authEnabled && !authRole;
const tabBar = document.getElementById("tab-bar");
const rigSwitch = document.querySelector(".header-rig-switch");
if (tabBar) tabBar.style.display = "";
document.querySelectorAll(".tab-bar .tab").forEach((btn) => {
const isMain = btn.dataset.tab === "main";
btn.style.display = !loggedOut || isMain ? "" : "none";
btn.disabled = false;
});
if (rigSwitch) {
rigSwitch.style.display = loggedOut ? "none" : "";
}
if (headerRigSwitchSelect) {
headerRigSwitchSelect.disabled = loggedOut || authRole === "rx" || lastRigIds.length === 0;
}
}
let overviewDrawPending = false;
let lastSpectrumData = null;
let rdsFrameCount = 0;
let lastControl;
let lastTxEn = null;
let lastHasTx = true;
let lastRendered = null;
let hintTimer = null;
let sigMeasuring = false;
let sigLastSUnits = null;
let sigMeasureTimer = null;
let sigMeasureLastTickMs = 0;
let sigMeasureAccumMs = 0;
let sigMeasureWeighted = 0;
let sigMeasurePeak = null;
let lastFreqHz = null;
let centerFreqDirty = false;
let jogUnit = loadSetting("jogUnit", 1000); // base unit: 1, 1000, 1000000
let jogMult = loadSetting("jogMult", 1); // divisor: 1, 10, 100
let jogStep = Math.max(Math.round(jogUnit / jogMult), 1);
let minFreqStepHz = 1;
let lastModeName = "";
const VFO_COLORS = ["var(--accent-green)", "var(--accent-yellow)"];
function vfoColor(idx) {
if (idx < VFO_COLORS.length) return VFO_COLORS[idx];
// Deterministic pseudo-random hue for extra VFOs
const hue = ((idx * 137) % 360);
return `hsl(${hue}, 70%, 55%)`;
}
let jogAngle = 0;
let lastClientCount = null;
let lastLocked = false;
let lastRigIds = [];
let lastRigDisplayNames = {};
let lastActiveRigId = null;
const originalTitle = document.title;
const savedTheme = loadSetting("theme", null);
function currentTheme() {
return document.documentElement.getAttribute("data-theme") === "light" ? "light" : "dark";
}
function setTheme(theme) {
const next = theme === "light" ? "light" : "dark";
document.documentElement.setAttribute("data-theme", next);
saveSetting("theme", next);
if (themeToggleBtn) {
themeToggleBtn.textContent = next === "dark" ? "βοΈ Light" : "π Dark";
themeToggleBtn.title = next === "dark" ? "Switch to light mode" : "Switch to dark mode";
}
}
// ββ Style / palette system ββββββββββββββββββββββββββββββββββββββββββββββββββββ
const CANVAS_PALETTE = {
original: {
dark: {
bg: "#0a0f18",
spectrumLine: "#00e676", spectrumFill: "rgba(0,230,118,0.10)",
spectrumGrid: "rgba(255,255,255,0.06)", spectrumLabel: "rgba(180,200,220,0.45)",
waveformLine: "rgba(94,234,212,0.92)", waveformPeak: "rgba(251,191,36,0.88)",
waveformGrid: "rgba(148,163,184,0.12)", waveformLabel: "rgba(203,213,225,0.72)",
waterfallHue: [225, 30], waterfallSat: 88, waterfallLight: [16, 68], waterfallAlpha: [0.28, 0.86],
},
light: {
bg: "#eef3fb",
spectrumLine: "#007a47", spectrumFill: "rgba(0,110,70,0.12)",
spectrumGrid: "rgba(0,30,80,0.10)", spectrumLabel: "rgba(30,50,90,0.55)",
waveformLine: "rgba(17,94,89,0.95)", waveformPeak: "rgba(217,119,6,0.9)",
waveformGrid: "rgba(71,85,105,0.14)", waveformLabel: "rgba(51,65,85,0.72)",
waterfallHue: [210, 35], waterfallSat: 82, waterfallLight: [92, 40], waterfallAlpha: [0.42, 0.80],
},
},
arctic: {
dark: {
bg: "#1e2530",
spectrumLine: "#88c0d0", spectrumFill: "rgba(136,192,208,0.12)",
spectrumGrid: "rgba(216,222,233,0.08)", spectrumLabel: "rgba(216,222,233,0.55)",
waveformLine: "rgba(136,192,208,0.92)", waveformPeak: "rgba(235,203,139,0.88)",
waveformGrid: "rgba(216,222,233,0.10)", waveformLabel: "rgba(216,222,233,0.65)",
waterfallHue: [212, 188], waterfallSat: 70, waterfallLight: [14, 58], waterfallAlpha: [0.28, 0.82],
},
light: {
bg: "#dde1e9",
spectrumLine: "#5e81ac", spectrumFill: "rgba(94,129,172,0.14)",
spectrumGrid: "rgba(46,52,64,0.08)", spectrumLabel: "rgba(46,52,64,0.55)",
waveformLine: "rgba(94,129,172,0.95)", waveformPeak: "rgba(208,135,112,0.9)",
waveformGrid: "rgba(46,52,64,0.12)", waveformLabel: "rgba(46,52,64,0.65)",
waterfallHue: [215, 195], waterfallSat: 65, waterfallLight: [88, 45], waterfallAlpha: [0.35, 0.78],
},
},
lime: {
dark: {
bg: "#181815",
spectrumLine: "#a6e22e", spectrumFill: "rgba(166,226,46,0.10)",
spectrumGrid: "rgba(248,248,242,0.05)", spectrumLabel: "rgba(248,248,242,0.45)",
waveformLine: "rgba(166,226,46,0.92)", waveformPeak: "rgba(230,219,116,0.88)",
waveformGrid: "rgba(248,248,242,0.08)", waveformLabel: "rgba(248,248,242,0.65)",
waterfallHue: [70, 38], waterfallSat: 80, waterfallLight: [12, 62], waterfallAlpha: [0.25, 0.88],
},
light: {
bg: "#ede8d8",
spectrumLine: "#5f8700", spectrumFill: "rgba(95,135,0,0.12)",
spectrumGrid: "rgba(39,40,34,0.08)", spectrumLabel: "rgba(39,40,34,0.50)",
waveformLine: "rgba(95,135,0,0.95)", waveformPeak: "rgba(176,120,0,0.9)",
waveformGrid: "rgba(39,40,34,0.10)", waveformLabel: "rgba(39,40,34,0.60)",
waterfallHue: [75, 42], waterfallSat: 75, waterfallLight: [90, 42], waterfallAlpha: [0.35, 0.78],
},
},
contrast: {
dark: {
bg: "#000000",
spectrumLine: "#00ff88", spectrumFill: "rgba(0,255,136,0.12)",
spectrumGrid: "rgba(255,255,255,0.12)", spectrumLabel: "rgba(255,255,255,0.70)",
waveformLine: "rgba(0,255,136,0.95)", waveformPeak: "rgba(255,204,0,0.92)",
waveformGrid: "rgba(255,255,255,0.15)", waveformLabel: "rgba(255,255,255,0.80)",
waterfallHue: [150, 60], waterfallSat: 100, waterfallLight: [8, 55], waterfallAlpha: [0.30, 0.95],
},
light: {
bg: "#f4f4f4",
spectrumLine: "#005cc5", spectrumFill: "rgba(0,92,197,0.12)",
spectrumGrid: "rgba(0,0,0,0.12)", spectrumLabel: "rgba(0,0,0,0.65)",
waveformLine: "rgba(0,92,197,0.95)", waveformPeak: "rgba(180,60,0,0.9)",
waveformGrid: "rgba(0,0,0,0.14)", waveformLabel: "rgba(0,0,0,0.70)",
waterfallHue: [220, 180], waterfallSat: 100, waterfallLight: [90, 42], waterfallAlpha: [0.35, 0.82],
},
},
};
function currentStyle() {
return document.documentElement.getAttribute("data-style") || "original";
}
function canvasPalette() {
const s = currentStyle();
const t = currentTheme();
return (CANVAS_PALETTE[s] ?? CANVAS_PALETTE.original)[t];
}
function setStyle(style) {
const remapped = style === "nord" ? "arctic" : style === "monokai" ? "lime" : style;
const valid = ["original", "arctic", "lime", "contrast"];
const next = valid.includes(remapped) ? remapped : "original";
if (next === "original") {
document.documentElement.removeAttribute("data-style");
} else {
document.documentElement.setAttribute("data-style", next);
}
saveSetting("style", next);
if (headerStylePickSelect) headerStylePickSelect.value = next;
scheduleOverviewDraw();
if (typeof scheduleSpectrumDraw === "function" && lastSpectrumData) scheduleSpectrumDraw();
}
if (overviewPeakHoldEl) {
if (!Number.isFinite(overviewPeakHoldMs) || overviewPeakHoldMs <= 0) {
overviewPeakHoldMs = 2000;
}
overviewPeakHoldEl.value = String(overviewPeakHoldMs);
overviewPeakHoldEl.addEventListener("change", () => {
overviewPeakHoldMs = Math.max(0, Number(overviewPeakHoldEl.value) || 0);
saveSetting("overviewPeakHoldMs", overviewPeakHoldMs);
scheduleOverviewDraw();
});
}
if (savedTheme === "light" || savedTheme === "dark") {
setTheme(savedTheme);
} else {
const prefersLight = window.matchMedia && window.matchMedia("(prefers-color-scheme: light)").matches;
setTheme(prefersLight ? "light" : "dark");
}
const savedStyle = loadSetting("style", "original");
setStyle(savedStyle);
if (themeToggleBtn) {
themeToggleBtn.addEventListener("click", () => {
setTheme(currentTheme() === "dark" ? "light" : "dark");
updateMapBaseLayerForTheme(currentTheme());
scheduleOverviewDraw();
if (typeof scheduleSpectrumDraw === "function" && lastSpectrumData) scheduleSpectrumDraw();
});
}
if (headerStylePickSelect) {
headerStylePickSelect.addEventListener("change", () => {
setStyle(headerStylePickSelect.value);
updateMapBaseLayerForTheme(currentTheme());
});
}
function readyText() {
return lastClientCount !== null ? `Ready \u00b7 ${lastClientCount} user${lastClientCount !== 1 ? "s" : ""}` : "Ready";
}
function rigBadgeColor(rigId) {
const text = (rigId || "rx").toString();
let hash = 0;
for (let i = 0; i < text.length; i++) {
hash = ((hash * 33) + text.charCodeAt(i)) >>> 0;
}
const hue = hash % 360;
return `hsl(${hue}, 62%, 52%)`;
}
window.getDecodeRigMeta = function() {
const rigId = lastActiveRigId || "local";
return {
rigId,
label: lastRigDisplayNames[rigId] || rigId,
color: rigBadgeColor(rigId),
};
};
function populateRigPicker(selectEl, rigIds, activeRigId, disabled) {
if (!selectEl) return;
const selectedBefore = selectEl.value;
selectEl.innerHTML = "";
rigIds.forEach((id) => {
const opt = document.createElement("option");
opt.value = id;
opt.textContent = id;
selectEl.appendChild(opt);
});
const preferred = (typeof activeRigId === "string" && rigIds.includes(activeRigId))
? activeRigId
: selectedBefore;
if (preferred && rigIds.includes(preferred)) {
selectEl.value = preferred;
}
selectEl.disabled = disabled;
}
function updateRigSubtitle(activeRigId) {
if (!rigSubtitle) return;
const name = (activeRigId && lastRigDisplayNames[activeRigId]) || activeRigId || "--";
rigSubtitle.textContent = `Rig: ${name}`;
}
function applyRigList(activeRigId, rigIds, displayNames) {
if (!Array.isArray(rigIds)) return;
lastRigIds = rigIds.filter((id) => typeof id === "string" && id.length > 0);
if (displayNames && typeof displayNames === "object") {
lastRigDisplayNames = { ...displayNames };
}
const aboutList = document.getElementById("about-rig-list");
if (aboutList) {
aboutList.textContent = lastRigIds.length ? lastRigIds.join(", ") : "--";
}
if (typeof activeRigId === "string" && activeRigId.length > 0) {
lastActiveRigId = activeRigId;
const aboutActive = document.getElementById("about-active-rig");
if (aboutActive) aboutActive.textContent = activeRigId;
}
const disableSwitch = lastRigIds.length === 0 || !authRole || authRole === "rx";
populateRigPicker(headerRigSwitchSelect, lastRigIds, activeRigId, disableSwitch);
updateRigSubtitle(activeRigId);
}
async function refreshRigList() {
try {
const resp = await fetch("/rigs", { cache: "no-store" });
if (!resp.ok) return;
const data = await resp.json();
const rigs = Array.isArray(data.rigs) ? data.rigs : [];
const rigIds = rigs.map((r) => r && r.rig_id).filter(Boolean);
const displayNames = {};
rigs.forEach((r) => {
if (!r || !r.rig_id) return;
if (typeof r.display_name === "string" && r.display_name.length > 0) {
displayNames[r.rig_id] = r.display_name;
} else {
displayNames[r.rig_id] = r.rig_id;
}
});
applyRigList(data.active_rig_id, rigIds, displayNames);
} catch (e) {
// Non-fatal: SSE/status path still drives main UI.
}
}
function showHint(msg, duration) {
powerHint.textContent = msg;
if (hintTimer) clearTimeout(hintTimer);
if (duration) hintTimer = setTimeout(() => { powerHint.textContent = readyText(); }, duration);
}
let supportedModes = [];
let supportedBands = [];
let freqDirty = false;
let initialized = false;
let lastEventAt = Date.now();
let es;
let esHeartbeat;
let reconnectTimer = null;
let overviewSignalSamples = [];
let overviewSignalTimer = null;
let overviewWaterfallRows = [];
let overviewWaterfallPushCount = 0; // monotonically increments on every push
const HEADER_SIG_WINDOW_MS = 10_000;
// Offscreen waterfall cache β reused across frames to avoid full redraws
let _wfOC = null; // OffscreenCanvas
let _wfOCPalKey = ""; // palette signature when offscreen was last built
let _wfOCPushCount = 0; // overviewWaterfallPushCount when offscreen was last updated
function _wfResetOffscreen() { _wfOC = null; _wfOCPushCount = 0; _wfOCPalKey = ""; }
function _wfPalKey(pal) {
return `${pal.waterfallHue}|${pal.waterfallSat}|${pal.waterfallLight}|${pal.waterfallAlpha}`;
}
function resizeHeaderSignalCanvas() {
if (!overviewCanvas) return;
const cssW = Math.floor(overviewCanvas.clientWidth);
const cssH = Math.floor(overviewCanvas.clientHeight);
if (cssW <= 0 || cssH <= 0) return;
const dpr = window.devicePixelRatio || 1;
const nextW = Math.floor(cssW * dpr);
const nextH = Math.floor(cssH * dpr);
if (overviewCanvas.width !== nextW || overviewCanvas.height !== nextH) {
overviewCanvas.width = nextW;
overviewCanvas.height = nextH;
_wfResetOffscreen();
trimOverviewWaterfallRows();
}
positionRdsPsOverlay();
drawHeaderSignalGraph();
}
function scheduleOverviewDraw() {
if (!overviewCanvas || overviewDrawPending) return;
overviewDrawPending = true;
requestAnimationFrame(() => {
overviewDrawPending = false;
drawHeaderSignalGraph();
});
}
function pushHeaderSignalSample(sUnits) {
if (!overviewCanvas) return;
const now = Date.now();
const sample = Number.isFinite(sUnits) ? Math.max(0, Math.min(20, sUnits)) : 0;
overviewSignalSamples.push({ t: now, v: sample });
while (overviewSignalSamples.length && now - overviewSignalSamples[0].t > HEADER_SIG_WINDOW_MS) {
overviewSignalSamples.shift();
}
scheduleOverviewDraw();
}
function trimOverviewWaterfallRows() {
if (!overviewCanvas) return;
const dpr = window.devicePixelRatio || 1;
const maxRows = Math.max(1, Math.floor(overviewCanvas.height / dpr));
while (overviewWaterfallRows.length > maxRows) {
overviewWaterfallRows.shift();
}
}
function overviewVisibleBinWindow(data, binCount) {
if (!data || !Number.isFinite(data.sample_rate) || binCount <= 1) {
return { startIdx: 0, endIdx: Math.max(0, binCount - 1) };
}
const range = spectrumVisibleRange(data);
const fullLoHz = data.center_hz - data.sample_rate / 2;
const startFrac = (range.visLoHz - fullLoHz) / data.sample_rate;
const endFrac = (range.visHiHz - fullLoHz) / data.sample_rate;
const maxIdx = binCount - 1;
const startIdx = Math.max(0, Math.min(maxIdx, Math.floor(startFrac * maxIdx)));
const endIdx = Math.max(startIdx, Math.min(maxIdx, Math.ceil(endFrac * maxIdx)));
return { startIdx, endIdx };
}
function pushOverviewWaterfallFrame(data) {
if (!overviewCanvas || !data || !Array.isArray(data.bins) || data.bins.length === 0) return;
overviewWaterfallRows.push(data.bins.slice());
overviewWaterfallPushCount++;
trimOverviewWaterfallRows();
scheduleOverviewDraw();
}
function startHeaderSignalSampling() {
if (!overviewCanvas || overviewSignalTimer) return;
overviewSignalTimer = setInterval(() => {
pushHeaderSignalSample(Number.isFinite(sigLastSUnits) ? sigLastSUnits : 0);
}, 120);
}
function drawHeaderSignalGraph() {
if (!overviewCanvas) return;
const ctx = overviewCanvas.getContext("2d");
if (!ctx) return;
const pal = canvasPalette();
const dpr = window.devicePixelRatio || 1;
const w = overviewCanvas.width / dpr;
const h = overviewCanvas.height / dpr;
if (w <= 0 || h <= 0) return;
ctx.save();
ctx.scale(dpr, dpr);
ctx.clearRect(0, 0, w, h);
if (lastSpectrumData && overviewWaterfallRows.length > 0) {
drawOverviewWaterfall(ctx, w, h, pal);
} else {
drawOverviewSignalHistory(ctx, w, h, pal);
}
ctx.restore();
positionRdsPsOverlay();
}
function _wfDrawRows(oct, rows, startRowIdx, endRowIdx, iW, iH, pal) {
// Draw rows[startRowIdx..endRowIdx) into oct, positioned at the canvas bottom.
// rowH is computed relative to the total row count (all of `rows`).
const total = rows.length;
const rowH = iH / total;
const columnStep = Math.max(1, Math.ceil(iW / 320));
for (let ri = startRowIdx; ri < endRowIdx; ri++) {
const bins = rows[ri];
if (!Array.isArray(bins) || bins.length === 0) continue;
const { startIdx, endIdx } = overviewVisibleBinWindow(lastSpectrumData, bins.length);
const spanBins = Math.max(1, endIdx - startIdx);
const y = iH - (total - ri) * rowH;
for (let x = 0; x < iW; x += columnStep) {
const frac = x / Math.max(1, iW - 1);
const binIdx = Math.min(endIdx, startIdx + Math.floor(frac * spanBins));
oct.fillStyle = waterfallColor(bins[binIdx], pal);
oct.fillRect(x, y, columnStep + 0.75, rowH + 1);
}
}
}
function drawOverviewWaterfall(ctx, w, h, pal) {
const maxVisible = Math.max(1, Math.floor(h));
const rows = overviewWaterfallRows.slice(-maxVisible);
if (rows.length === 0) return;
const iW = Math.ceil(w);
const iH = Math.ceil(h);
const palKey = _wfPalKey(pal);
const steadyState = rows.length >= maxVisible;
// How many rows were pushed since the offscreen was last updated
const newPushes = overviewWaterfallPushCount - _wfOCPushCount;
// Detect conditions that require a full redraw
const sizeChanged = !_wfOC || _wfOC.width !== iW || _wfOC.height !== iH;
const palChanged = _wfOCPalKey !== palKey;
const needsFull = sizeChanged || palChanged || _wfOCPushCount === 0;
if (sizeChanged || !_wfOC) {
_wfOC = new OffscreenCanvas(iW, iH);
_wfOCPushCount = 0;
}
const oct = _wfOC.getContext("2d");
if (needsFull) {
oct.clearRect(0, 0, iW, iH);
_wfDrawRows(oct, rows, 0, rows.length, iW, iH, pal);
_wfOCPushCount = overviewWaterfallPushCount;
_wfOCPalKey = palKey;
} else if (steadyState && newPushes > 0) {
// Steady state: scroll up and paint only the new rows at the bottom.
// newPushes new rows are at the tail of `rows`; each replaces one old row.
const newCount = Math.min(newPushes, rows.length);
const rowH = iH / rows.length;
const scrollPx = Math.round(newCount * rowH);
if (scrollPx > 0 && scrollPx < iH) {
const img = oct.getImageData(0, scrollPx, iW, iH - scrollPx);
oct.putImageData(img, 0, 0);
oct.clearRect(0, iH - scrollPx, iW, scrollPx);
}
_wfDrawRows(oct, rows, rows.length - newCount, rows.length, iW, iH, pal);
_wfOCPushCount = overviewWaterfallPushCount;
}
ctx.drawImage(_wfOC, 0, 0, w, h);
}
function drawOverviewSignalHistory(ctx, w, h, pal) {
const now = Date.now();
const samples = overviewSignalSamples.filter((sample) => now - sample.t <= HEADER_SIG_WINDOW_MS);
if (samples.length === 0) return;
const maxVal = 20;
const windowStart = now - HEADER_SIG_WINDOW_MS;
const toX = (t) => ((t - windowStart) / HEADER_SIG_WINDOW_MS) * w;
const toY = (v) => h - (Math.max(0, Math.min(maxVal, v)) / maxVal) * (h - 3) - 1.5;
const gridMarkers = [
{ val: 0, label: "S0" },
{ val: 9, label: "S9" },
{ val: 18, label: "S9+" },
];
ctx.strokeStyle = pal.waveformGrid;
ctx.lineWidth = 1;
ctx.font = "11px sans-serif";
ctx.fillStyle = pal.waveformLabel;
ctx.textAlign = "right";
ctx.textBaseline = "middle";
for (const marker of gridMarkers) {
const y = toY(marker.val);
ctx.beginPath();
ctx.moveTo(0, y);
ctx.lineTo(w, y);
ctx.stroke();
ctx.fillText(marker.label, w - 6, Math.max(8, Math.min(h - 8, y + 6)));
}
ctx.beginPath();
samples.forEach((sample, idx) => {
const x = toX(sample.t);
const y = toY(sample.v);
if (idx === 0) ctx.moveTo(x, y);
else ctx.lineTo(x, y);
});
ctx.strokeStyle = pal.waveformLine;
ctx.lineWidth = 1.6;
ctx.stroke();
const holdMs = Math.max(0, Number.isFinite(overviewPeakHoldMs) ? overviewPeakHoldMs : 0);
if (holdMs > 0) {
ctx.beginPath();
for (let i = 0; i < samples.length; i++) {
let peak = samples[i].v;
for (let j = i; j >= 0; j--) {
if (samples[i].t - samples[j].t > holdMs) break;
if (samples[j].v > peak) peak = samples[j].v;
}
const x = toX(samples[i].t);
const y = toY(peak);
if (i === 0) ctx.moveTo(x, y);
else ctx.lineTo(x, y);
}
ctx.strokeStyle = pal.waveformPeak;
ctx.lineWidth = 1;
ctx.stroke();
}
}
function waterfallColor(db, pal) {
const clamped = Math.max(-120, Math.min(-10, Number.isFinite(db) ? db : -120));
const t = (clamped + 120) / 110;
const hue = pal.waterfallHue[0] + t * (pal.waterfallHue[1] - pal.waterfallHue[0]);
const light = pal.waterfallLight[0] + t * (pal.waterfallLight[1] - pal.waterfallLight[0]);
const alpha = pal.waterfallAlpha[0] + t * (pal.waterfallAlpha[1] - pal.waterfallAlpha[0]);
return `hsla(${hue}, ${pal.waterfallSat}%, ${light}%, ${alpha})`;
}
function formatFreq(hz) {
if (!Number.isFinite(hz)) return "--";
if (hz >= 1_000_000_000) {
return `${(hz / 1_000_000_000).toFixed(3)} GHz`;
}
if (hz >= 10_000_000) {
return `${(hz / 1_000_000).toFixed(3)} MHz`;
}
return `${(hz / 1_000).toFixed(1)} kHz`;
}
function formatFreqForStep(hz, step) {
if (!Number.isFinite(hz)) return "--";
if (step >= 1_000_000) return (hz / 1_000_000).toFixed(6);
if (step >= 1_000) return (hz / 1_000).toFixed(3);
if (step >= 1) return String(Math.round(hz));
return formatFreq(hz);
}
function formatWavelength(hz) {
if (!Number.isFinite(hz) || hz <= 0) return "--";
const meters = 299_792_458 / hz;
if (meters >= 1) return `${Math.round(meters)} m`;
return `${Math.round(meters * 100)} cm`;
}
function refreshWavelengthDisplay(hz) {
if (!wavelengthEl) return;
wavelengthEl.textContent = formatWavelength(hz);
}
function refreshFreqDisplay() {
if (lastFreqHz == null || freqDirty) return;
freqEl.value = formatFreqForStep(lastFreqHz, jogUnit);
refreshWavelengthDisplay(lastFreqHz);
}
function positionRdsPsOverlay() {
if (!rdsPsOverlay || !lastSpectrumData || lastFreqHz == null || !overviewCanvas) return;
const width = overviewCanvas.clientWidth || overviewCanvas.width || 0;
if (width <= 0) {
return;
}
const range = spectrumVisibleRange(lastSpectrumData);
if (!Number.isFinite(range.visLoHz) || !Number.isFinite(range.visSpanHz) || range.visSpanHz <= 0) {
return;
}
const rel = (lastFreqHz - range.visLoHz) / range.visSpanHz;
const clamped = Math.max(0.06, Math.min(0.94, rel));
rdsPsOverlay.style.left = `${clamped * width}px`;
}
function resetRdsDisplay() {
rdsFrameCount = 0;
updateRdsPsOverlay(null);
}
function applyLocalTunedFrequency(hz, forceDisplay = false) {
if (!Number.isFinite(hz)) return;
const freqChanged = lastFreqHz !== hz;
if (freqChanged) {
resetRdsDisplay();
}
lastFreqHz = hz;
refreshWavelengthDisplay(lastFreqHz);
if (forceDisplay) {
freqDirty = false;
}
if (forceDisplay || !freqDirty) {
refreshFreqDisplay();
}
window.ft8BaseHz = lastFreqHz;
if (window.updateFt8RfDisplay) {
window.updateFt8RfDisplay();
}
if (lastSpectrumData) {
scheduleSpectrumDraw();
}
positionRdsPsOverlay();
}
function refreshCenterFreqDisplay() {
if (!centerFreqEl || !lastSpectrumData || centerFreqDirty) return;
centerFreqEl.value = formatFreqForStep(lastSpectrumData.center_hz, jogUnit);
}
function parseFreqInput(val, defaultStep) {
if (!val) return null;
const trimmed = val.trim().toLowerCase();
const match = trimmed.match(/^([0-9]+(?:[.,][0-9]+)?)\s*([kmg]hz|[kmg]|hz)?$/);
if (!match) return null;
let num = parseFloat(match[1].replace(",", "."));
const unit = match[2] || "";
if (Number.isNaN(num)) return null;
if (unit.startsWith("gh") || unit === "g") {
num *= 1_000_000_000;
} else if (unit.startsWith("mh") || unit === "m") {
num *= 1_000_000;
} else if (unit.startsWith("kh") || unit === "k") {
num *= 1_000;
} else if (!unit) {
// Use currently selected input unit when user omits suffix.
if (defaultStep >= 1_000_000) {
num *= 1_000_000;
} else if (defaultStep >= 1_000) {
num *= 1_000;
} else if (defaultStep >= 1) {
// already Hz
} else {
// Fallback heuristic.
if (num >= 1_000_000) {
// Assume already Hz.
} else if (num >= 1_000) {
num *= 1_000;
} else {
num *= 1_000_000;
}
}
}
return Math.round(num);
}
function normalizeMinFreqStep(cap) {
const val = Number(cap && cap.min_freq_step_hz);
if (!Number.isFinite(val) || val < 1) return 1;
return Math.round(val);
}
function alignFreqToRigStep(hz) {
if (!Number.isFinite(hz)) return hz;
const step = Math.max(1, minFreqStepHz);
return Math.round(hz / step) * step;
}
function updateJogStepSupport(cap) {
const nextMinStep = normalizeMinFreqStep(cap);
minFreqStepHz = nextMinStep;
const stepRoot = document.getElementById("jog-step");
if (!stepRoot) return;
const buttons = Array.from(stepRoot.querySelectorAll("button[data-step]"));
if (buttons.length === 0) return;
buttons.forEach((btn) => {
const base = Number(btn.dataset.baseStep || btn.dataset.step);
if (Number.isFinite(base) && base > 0) {
btn.dataset.baseStep = String(Math.round(base));
btn.dataset.step = String(Math.max(Math.round(base), minFreqStepHz));
}
});
const steps = buttons
.map((btn) => Number(btn.dataset.step))
.filter((s) => Number.isFinite(s) && s > 0);
if (steps.length === 0) return;
const current = Number(jogUnit);
const desired =
Number.isFinite(current) && current >= minFreqStepHz ? current : Math.max(steps[0], minFreqStepHz);
jogUnit = steps.reduce((best, s) => (Math.abs(s - desired) < Math.abs(best - desired) ? s : best), steps[0]);
jogStep = Math.max(Math.round(jogUnit / jogMult), minFreqStepHz);
saveSetting("jogUnit", jogUnit);
saveSetting("jogStep", jogStep);
buttons.forEach((btn) => {
btn.classList.toggle("active", Number(btn.dataset.step) === jogUnit);
});
refreshFreqDisplay();
refreshCenterFreqDisplay();
}
function normalizeMode(modeVal) {
if (typeof modeVal === "string") return modeVal;
if (modeVal && typeof modeVal === "object") {
const entries = Object.entries(modeVal);
if (entries.length > 0) {
const [variant, value] = entries[0];
if (variant === "Other" && typeof value === "string") return value;
return variant;
}
}
return "";
}
function updateSupportedBands(cap) {
if (cap && Array.isArray(cap.supported_bands)) {
supportedBands = cap.supported_bands
.filter((b) => typeof b.low_hz === "number" && typeof b.high_hz === "number" && b.tx_allowed === true)
.map((b) => ({ low: b.low_hz, high: b.high_hz }));
} else {
supportedBands = [];
}
}
function freqAllowed(hz) {
if (!Number.isFinite(hz)) return false;
if (supportedBands.length === 0) return true; // if unknown, don't block
return supportedBands.some((b) => hz >= b.low && hz <= b.high);
}
// Convert dBm (wire format) to S-units (S1=-121dBm, S9=-73dBm, 6dB/S-unit).
// Above S9, returns 9 + (overshoot in S-unit-equivalent, i.e. dB/10).
function dbmToSUnits(dbm) {
if (!Number.isFinite(dbm)) return 0;
// Guard against bogus backend values to keep display in a realistic range.
const clampedDbm = Math.max(-140, Math.min(20, dbm));
if (clampedDbm <= -121) return 0;
if (clampedDbm >= -73) return 9 + (clampedDbm + 73) / 10;
return (clampedDbm + 121) / 6;
}
function formatSignal(sUnits) {
if (!Number.isFinite(sUnits) || sUnits <= 9) return `S${Math.max(0, sUnits || 0).toFixed(1)}`;
// S9+60dB is already extremely strong; cap anything beyond that.
const overDb = Math.min(60, (sUnits - 9) * 10);
return `S9 + ${overDb.toFixed(0)}dB`;
}
function setDisabled(disabled) {
[freqEl, centerFreqEl, modeEl, pttBtn, powerBtn, txLimitInput, txLimitBtn, lockBtn].forEach((el) => {
if (el) el.disabled = disabled;
});
}
let serverVersion = null;
let serverBuildDate = null;
let serverCallsign = null;
let ownerCallsign = null;
let serverLat = null;
let serverLon = null;
function updateFooterBuildInfo() {
const serverEl = document.getElementById("footer-server-build");
if (!serverEl) return;
const ver = serverVersion || "--";
const build = serverBuildDate || "--";
serverEl.textContent = `trx-server v${ver} ${build}`;
}
function updateTitle() {
const titleEl = document.getElementById("rig-title");
if (!titleEl) return;
titleEl.textContent = serverVersion ? `trx-rs v${serverVersion}` : "trx-rs";
}
function render(update) {
if (!update) return;
if (update.server_version) serverVersion = update.server_version;
if (update.server_build_date) serverBuildDate = update.server_build_date;
if (update.server_callsign) serverCallsign = update.server_callsign;
if (typeof update.owner_callsign === "string" && update.owner_callsign.length > 0) {
ownerCallsign = update.owner_callsign;
}
if (update.server_latitude != null) serverLat = update.server_latitude;
if (update.server_longitude != null) serverLon = update.server_longitude;
updateTitle();
updateFooterBuildInfo();
initialized = !!update.initialized;
const hasUsableSnapshot =
!!update.info &&
!!update.status &&
!!update.status.freq &&
typeof update.status.freq.hz === "number";
if (!initialized) {
const fallbackRigName = originalTitle || "Rig";
const manu = (update.info && update.info.manufacturer) || fallbackRigName;
const model = (update.info && update.info.model) || fallbackRigName;
const rev = (update.info && update.info.revision) || "";
const parts = [manu, model, rev].filter(Boolean).join(" ");
if (!hasUsableSnapshot) {
loadingTitle.textContent = `Initializing ${parts}β¦`;
loadingSub.textContent = "";
console.info("Rig initializing:", { manufacturer: manu, model, revision: rev });
loadingEl.style.display = "";
if (contentEl) contentEl.style.display = "none";
powerHint.textContent = "Initializing rigβ¦";
setDisabled(true);
return;
}
loadingEl.style.display = "none";
if (contentEl) contentEl.style.display = "";
powerHint.textContent = "Rig not fully initialized yet";
} else {
loadingEl.style.display = "none";
if (contentEl) contentEl.style.display = "";
}
// Server subtitle: "trx-server vX.Y.Z hosted by CALL"
if (serverSubtitle) {
if (update.server_version && update.server_callsign) {
const safeCallsign = escapeMapHtml(update.server_callsign);
const encodedCallsign = encodeURIComponent(update.server_callsign);
serverSubtitle.innerHTML =
`trx-server v${update.server_version} hosted by ${safeCallsign}`;
} else if (update.server_version) {
serverSubtitle.textContent = `trx-server v${update.server_version}`;
} else if (update.server_callsign) {
const safeCallsign = escapeMapHtml(update.server_callsign);
const encodedCallsign = encodeURIComponent(update.server_callsign);
serverSubtitle.innerHTML =
`trx-server hosted by ${safeCallsign}`;
}
}
updateRigSubtitle(update.active_rig_id);
if (ownerSubtitle) {
if (ownerCallsign) {
const safeOwner = escapeMapHtml(ownerCallsign);
const encodedOwner = encodeURIComponent(ownerCallsign);
ownerSubtitle.innerHTML =
`Owner: ${safeOwner}`;
} else {
ownerSubtitle.textContent = "Owner: --";
}
}
setDisabled(false);
if (update.info && update.info.capabilities && Array.isArray(update.info.capabilities.supported_modes)) {
const modes = update.info.capabilities.supported_modes.map(normalizeMode).filter(Boolean);
if (JSON.stringify(modes) !== JSON.stringify(supportedModes)) {
supportedModes = modes;
modeEl.innerHTML = "";
supportedModes.forEach((m) => {
const opt = document.createElement("option");
opt.value = m;
opt.textContent = m;
modeEl.appendChild(opt);
});
}
}
if (update.info && update.info.capabilities) {
updateJogStepSupport(update.info.capabilities);
updateSupportedBands(update.info.capabilities);
applyCapabilities(update.info.capabilities);
}
// Sync filter state (SDR backends only)
if (update.filter && typeof update.filter.bandwidth_hz === "number") {
currentBandwidthHz = update.filter.bandwidth_hz;
syncBandwidthInput(currentBandwidthHz);
if (wfmDeemphasisEl && typeof update.filter.wfm_deemphasis_us === "number") {
wfmDeemphasisEl.value = String(update.filter.wfm_deemphasis_us);
}
}
if (update.status && update.status.freq && typeof update.status.freq.hz === "number") {
applyLocalTunedFrequency(update.status.freq.hz, true);
}
if (update.status && update.status.mode) {
const mode = normalizeMode(update.status.mode);
const modeUpper = mode ? mode.toUpperCase() : "";
modeEl.value = modeUpper;
if (modeUpper === "WFM" && lastModeName !== "WFM") {
setJogDivisor(10);
}
lastModeName = modeUpper;
updateWfmControls();
// When filter panel is active (SDR backend), update the BW slider range
// to match the new mode β but only if the server hasn't already sent a
// filter state that overrides it.
// When SDR backend is active (spectrum visible), apply BW default for new
// mode β but only if the server hasn't already pushed a filter_state.
if (lastSpectrumData && !update.filter) {
applyBwDefaultForMode(mode, false);
}
}
const modeUpper = update.status && update.status.mode ? normalizeMode(update.status.mode).toUpperCase() : "";
const aprsStatus = document.getElementById("aprs-status");
const cwStatus = document.getElementById("cw-status");
const ft8Status = document.getElementById("ft8-status");
const wsprStatus = document.getElementById("wspr-status");
if (aprsStatus && modeUpper !== "PKT" && aprsStatus.textContent === "Receiving") {
aprsStatus.textContent = "Connected, listening for packets";
}
if (cwStatus && modeUpper !== "CW" && modeUpper !== "CWR" && cwStatus.textContent === "Receiving") {
cwStatus.textContent = "Connected, listening for packets";
}
const ft8Enabled = !!update.ft8_decode_enabled;
if (ft8Status && (!ft8Enabled || (modeUpper !== "DIG" && modeUpper !== "USB")) && ft8Status.textContent === "Receiving") {
ft8Status.textContent = "Connected, listening for packets";
}
const wsprEnabled = !!update.wspr_decode_enabled;
if (wsprStatus && (!wsprEnabled || (modeUpper !== "DIG" && modeUpper !== "USB")) && wsprStatus.textContent === "Receiving") {
wsprStatus.textContent = "Connected, listening for packets";
}
if (update.status && typeof update.status.tx_en === "boolean") {
lastTxEn = update.status.tx_en;
pttBtn.textContent = update.status.tx_en ? "PTT On" : "PTT Off";
if (update.status.tx_en) {
pttBtn.style.background = "var(--accent-red)";
pttBtn.style.borderColor = "var(--accent-red)";
pttBtn.style.color = "white";
} else {
pttBtn.style.background = "";
pttBtn.style.borderColor = "";
pttBtn.style.color = "";
}
}
const ft8ToggleBtn = document.getElementById("ft8-decode-toggle-btn");
if (ft8ToggleBtn) {
const ft8On = !!update.ft8_decode_enabled;
ft8ToggleBtn.textContent = ft8On ? "Disable FT8" : "Enable FT8";
ft8ToggleBtn.style.borderColor = ft8On ? "#00d17f" : "";
ft8ToggleBtn.style.color = ft8On ? "#00d17f" : "";
}
const wsprToggleBtn = document.getElementById("wspr-decode-toggle-btn");
if (wsprToggleBtn) {
const wsprOn = !!update.wspr_decode_enabled;
wsprToggleBtn.textContent = wsprOn ? "Disable WSPR" : "Enable WSPR";
wsprToggleBtn.style.borderColor = wsprOn ? "#00d17f" : "";
wsprToggleBtn.style.color = wsprOn ? "#00d17f" : "";
}
const cwAutoEl = document.getElementById("cw-auto");
const cwWpmEl = document.getElementById("cw-wpm");
const cwToneEl = document.getElementById("cw-tone");
if (cwAutoEl && typeof update.cw_auto === "boolean") {
cwAutoEl.checked = update.cw_auto;
}
if (cwWpmEl && typeof update.cw_wpm === "number") {
cwWpmEl.value = update.cw_wpm;
}
if (cwToneEl && typeof update.cw_tone_hz === "number") {
cwToneEl.value = update.cw_tone_hz;
}
if (cwWpmEl && cwToneEl && typeof update.cw_auto === "boolean") {
const disabled = update.cw_auto;
cwWpmEl.disabled = disabled;
cwWpmEl.readOnly = disabled;
cwToneEl.disabled = disabled;
cwToneEl.readOnly = disabled;
}
if (update.status && update.status.vfo && Array.isArray(update.status.vfo.entries)) {
const entries = update.status.vfo.entries;
const activeIdx = Number.isInteger(update.status.vfo.active) ? update.status.vfo.active : null;
vfoPicker.innerHTML = "";
entries.forEach((entry, idx) => {
const hz = entry && entry.freq && typeof entry.freq.hz === "number" ? entry.freq.hz : null;
if (hz === null) return;
const mode = entry.mode ? normalizeMode(entry.mode) : "";
const modeText = mode ? ` [${mode}]` : "";
const label = `${entry.name || String.fromCharCode(65 + idx)}: ${formatFreq(hz)}${modeText}`;
const btn = document.createElement("button");
btn.type = "button";
btn.textContent = label;
const color = vfoColor(idx);
if (activeIdx === idx) {
btn.classList.add("active");
btn.style.color = color;
freqEl.style.color = color;
} else btn.addEventListener("click", async () => {
btn.disabled = true;
showHint("Toggling VFOβ¦");
try {
await postPath("/toggle_vfo");
showHint("VFO toggled", 1200);
} catch (err) {
showHint("VFO toggle failed", 2000);
console.error(err);
} finally {
btn.disabled = false;
}
});
vfoPicker.appendChild(btn);
});
} else {
vfoPicker.innerHTML = "";
}
if (update.status && update.status.rx && typeof update.status.rx.sig === "number") {
const sUnits = dbmToSUnits(update.status.rx.sig);
sigLastSUnits = sUnits;
const pct = sUnits <= 9 ? Math.max(0, Math.min(100, (sUnits / 9) * 100)) : 100;
signalBar.style.width = `${pct}%`;
signalValue.textContent = formatSignal(sUnits);
} else {
sigLastSUnits = null;
signalBar.style.width = "0%";
signalValue.textContent = "--";
}
if (bandLabel) {
bandLabel.textContent = typeof update.band === "string" ? update.band : "--";
}
if (typeof update.enabled === "boolean") {
powerBtn.disabled = false;
powerBtn.textContent = update.enabled ? "Power Off" : "Power On";
} else {
powerBtn.disabled = true;
powerBtn.textContent = "Toggle Power";
powerHint.textContent = "State unknown";
}
lastControl = update.enabled;
if (update.status && update.status.tx && typeof update.status.tx.limit === "number") {
txLimitInput.value = update.status.tx.limit;
txLimitRow.style.display = "";
} else {
txLimitInput.value = "";
txLimitRow.style.display = "none";
}
if (typeof update.clients === "number") lastClientCount = update.clients;
// Populate About tab
if (update.server_version) {
document.getElementById("about-server-ver").textContent = `trx-server v${update.server_version}`;
}
document.getElementById("about-server-addr").textContent = location.host;
if (update.server_callsign) {
document.getElementById("about-server-call").textContent = update.server_callsign;
}
if (update.pskreporter_status) {
document.getElementById("about-pskreporter").textContent = update.pskreporter_status;
}
if (update.info) {
const parts = [update.info.manufacturer, update.info.model, update.info.revision].filter(Boolean).join(" ");
if (parts) document.getElementById("about-rig-info").textContent = parts;
const access = update.info.access;
if (access) {
if (access.Serial) {
const serialPath = access.Serial.path || access.Serial.port || "?";
document.getElementById("about-rig-access").textContent = `Serial (${serialPath}, ${access.Serial.baud || "?"} baud)`;
} else if (access.Tcp) {
document.getElementById("about-rig-access").textContent = `TCP (${access.Tcp.host || "?"}:${access.Tcp.port || "?"})`;
} else {
const key = Object.keys(access)[0];
if (key) document.getElementById("about-rig-access").textContent = key;
}
}
if (update.info.capabilities) {
const cap = update.info.capabilities;
if (Array.isArray(cap.supported_modes) && cap.supported_modes.length) {
document.getElementById("about-modes").textContent = cap.supported_modes.map(normalizeMode).filter(Boolean).join(", ");
}
if (typeof cap.num_vfos === "number") {
document.getElementById("about-vfos").textContent = cap.num_vfos;
}
}
}
if (typeof update.clients === "number") {
document.getElementById("about-clients").textContent = update.clients;
}
if (typeof update.active_rig_id === "string" && update.active_rig_id.length > 0) {
document.getElementById("about-active-rig").textContent = update.active_rig_id;
}
if (Array.isArray(update.rig_ids)) {
applyRigList(update.active_rig_id, update.rig_ids);
}
if (typeof update.rigctl_clients === "number") {
document.getElementById("about-rigctl-clients").textContent = update.rigctl_clients;
}
if (typeof update.rigctl_addr === "string" && update.rigctl_addr.length > 0) {
document.getElementById("about-rigctl-endpoint").textContent = update.rigctl_addr;
}
powerHint.textContent = readyText();
lastLocked = update.status && update.status.lock === true;
lockBtn.textContent = lastLocked ? "Unlock" : "Lock";
const tx = update.status && update.status.tx ? update.status.tx : null;
txMeters.style.display = lastHasTx ? "" : "none";
if (tx && typeof tx.power === "number") {
const pct = Math.max(0, Math.min(100, tx.power));
pwrBar.style.width = `${pct}%`;
pwrValue.textContent = `PWR ${tx.power.toFixed(0)}%`;
} else {
pwrBar.style.width = "0%";
pwrValue.textContent = "PWR --";
}
if (tx && typeof tx.swr === "number") {
const swr = Math.max(1, tx.swr);
const pct = Math.max(0, Math.min(100, ((swr - 1) / 2) * 100));
swrBar.style.width = `${pct}%`;
swrValue.textContent = `SWR ${tx.swr.toFixed(2)}`;
} else {
swrBar.style.width = "0%";
swrValue.textContent = "SWR --";
}
}
function scheduleReconnect(delayMs = 1000) {
if (reconnectTimer) return;
reconnectTimer = setTimeout(() => {
reconnectTimer = null;
connect();
}, delayMs);
}
async function pollFreshSnapshot() {
try {
const resp = await fetch("/status", { cache: "no-store" });
if (!resp.ok) return;
const data = await resp.json();
render(data);
refreshRigList();
lastEventAt = Date.now();
} catch (e) {
// Ignore network errors; connect() retry loop handles reconnection.
}
}
function connect() {
if (es) {
es.close();
}
if (esHeartbeat) {
clearInterval(esHeartbeat);
}
pollFreshSnapshot();
es = new EventSource("/events");
lastEventAt = Date.now();
es.onopen = () => {
pollFreshSnapshot();
refreshRigList();
};
es.onmessage = (evt) => {
try {
if (evt.data === lastRendered) return;
const data = JSON.parse(evt.data);
lastRendered = evt.data;
render(data);
lastEventAt = Date.now();
if (data.initialized) {
powerHint.textContent = readyText();
}
} catch (e) {
console.error("Bad event data", e);
}
};
es.onerror = () => {
// Check if this is an auth error by looking at readyState
if (es.readyState === EventSource.CLOSED) {
powerHint.textContent = "Disconnected, retryingβ¦";
es.close();
pollFreshSnapshot();
scheduleReconnect(1000);
}
};
esHeartbeat = setInterval(() => {
const now = Date.now();
if (now - lastEventAt > 15000) {
es.close();
pollFreshSnapshot();
scheduleReconnect(250);
}
}, 5000);
}
function disconnect() {
// Close event sources
if (es) {
es.close();
es = null;
}
if (decodeSource) {
decodeSource.close();
decodeSource = null;
}
stopSpectrumStreaming();
// Clear timers
if (esHeartbeat) {
clearInterval(esHeartbeat);
esHeartbeat = null;
}
if (reconnectTimer) {
clearTimeout(reconnectTimer);
reconnectTimer = null;
}
}
async function postPath(path) {
const resp = await fetch(path, { method: "POST" });
if (authEnabled && resp.status === 401) {
// Not authenticated - return to login
authRole = null;
if (es) es.close();
showAuthGate();
throw new Error("Authentication required");
}
if (resp.status === 403) {
// Authenticated but insufficient permissions - don't redirect
throw new Error("Insufficient permissions");
}
if (!resp.ok) {
const text = await resp.text();
throw new Error(text || resp.statusText);
}
return resp;
}
async function switchRigFromSelect(selectEl) {
if (!selectEl || !selectEl.value) {
showHint("No rig selected", 1500);
return;
}
if (authRole === "rx") {
showHint("Control role required", 1500);
return;
}
if (!lastRigIds.includes(selectEl.value)) {
showHint("Unknown rig", 1500);
return;
}
selectEl.disabled = true;
showHint("Switching rigβ¦");
try {
await postPath(`/select_rig?rig_id=${encodeURIComponent(selectEl.value)}`);
refreshRigList();
showHint("Rig switch requested", 1500);
} catch (err) {
showHint("Rig switch failed", 2000);
console.error(err);
} finally {
const disableSwitch = lastRigIds.length === 0 || !authRole || authRole === "rx";
selectEl.disabled = disableSwitch;
}
}
if (headerRigSwitchSelect) {
headerRigSwitchSelect.addEventListener("change", () => { switchRigFromSelect(headerRigSwitchSelect); });
}
powerBtn.addEventListener("click", async () => {
powerBtn.disabled = true;
showHint("Sending...");
try {
await postPath("/toggle_power");
showHint("Toggled, waiting for updateβ¦");
} catch (err) {
showHint("Toggle failed", 2000);
console.error(err);
} finally {
powerBtn.disabled = false;
}
});
pttBtn.addEventListener("click", async () => {
pttBtn.disabled = true;
showHint("Toggling PTTβ¦");
try {
const desired = lastTxEn ? "false" : "true";
await postPath(`/set_ptt?ptt=${desired}`);
showHint("PTT command sent", 1500);
} catch (err) {
showHint("PTT toggle failed", 2000);
console.error(err);
} finally {
pttBtn.disabled = false;
}
});
async function applyFreqFromInput() {
const parsedRaw = parseFreqInput(freqEl.value, jogUnit);
const parsed = alignFreqToRigStep(parsedRaw);
if (parsed === null) {
showHint("Freq missing", 1500);
return;
}
if (!freqAllowed(parsed)) {
showHint("Out of supported bands", 1500);
return;
}
freqDirty = false;
freqEl.disabled = true;
showHint("Setting frequencyβ¦");
try {
await postPath(`/set_freq?hz=${parsed}`);
applyLocalTunedFrequency(parsed);
showHint("Freq set", 1500);
} catch (err) {
showHint("Set freq failed", 2000);
console.error(err);
} finally {
freqEl.disabled = false;
}
}
async function applyCenterFreqFromInput() {
if (!centerFreqEl) return;
const parsedRaw = parseFreqInput(centerFreqEl.value, jogUnit);
const parsed = alignFreqToRigStep(parsedRaw);
if (parsed === null) {
showHint("Central freq missing", 1500);
return;
}
if (!freqAllowed(parsed)) {
showHint("Out of supported bands", 1500);
return;
}
centerFreqDirty = false;
centerFreqEl.disabled = true;
showHint("Setting central frequencyβ¦");
try {
await postPath(`/set_center_freq?hz=${parsed}`);
showHint("Central freq set", 1500);
} catch (err) {
showHint("Set central freq failed", 2000);
console.error(err);
} finally {
centerFreqEl.disabled = false;
}
}
freqEl.addEventListener("keydown", (e) => {
freqDirty = true;
if (e.key === "Enter") {
e.preventDefault();
applyFreqFromInput();
}
});
if (centerFreqEl) {
centerFreqEl.addEventListener("keydown", (e) => {
centerFreqDirty = true;
if (e.key === "Enter") {
e.preventDefault();
applyCenterFreqFromInput();
}
});
}
freqEl.addEventListener("wheel", (e) => {
e.preventDefault();
const direction = e.deltaY < 0 ? 1 : -1;
jogFreq(direction);
}, { passive: false });
// --- Jog wheel ---
const jogWheel = document.getElementById("jog-wheel");
const jogIndicator = document.getElementById("jog-indicator");
const jogDownBtn = document.getElementById("jog-down");
const jogUpBtn = document.getElementById("jog-up");
const jogStepEl = document.getElementById("jog-step");
const jogMultEl = document.getElementById("jog-mult");
const VALID_JOG_DIVISORS = new Set([1, 10]);
function applyJogStep() {
jogStep = Math.max(Math.round(jogUnit / jogMult), minFreqStepHz);
saveSetting("jogUnit", jogUnit);
saveSetting("jogMult", jogMult);
saveSetting("jogStep", jogStep);
refreshFreqDisplay();
refreshCenterFreqDisplay();
}
function setJogDivisor(divisor) {
const next = VALID_JOG_DIVISORS.has(divisor) ? divisor : 1;
jogMult = next;
if (jogMultEl) {
jogMultEl.querySelectorAll("button[data-mult]").forEach((b) => {
b.classList.toggle("active", parseInt(b.dataset.mult, 10) === jogMult);
});
}
applyJogStep();
}
async function jogFreq(direction) {
if (lastLocked) { showHint("Locked", 1500); return; }
if (lastFreqHz === null) return;
const newHz = alignFreqToRigStep(lastFreqHz + direction * jogStep);
if (!freqAllowed(newHz)) {
showHint("Out of supported bands", 1500);
return;
}
jogAngle = (jogAngle + direction * 15) % 360;
jogIndicator.style.transform = `translateX(-50%) rotate(${jogAngle}deg)`;
showHint("Setting frequencyβ¦");
try {
await postPath(`/set_freq?hz=${newHz}`);
applyLocalTunedFrequency(newHz);
showHint("Freq set", 1000);
} catch (err) {
showHint("Set freq failed", 2000);
console.error(err);
}
}
jogDownBtn.addEventListener("click", () => jogFreq(-1));
jogUpBtn.addEventListener("click", () => jogFreq(1));
jogWheel.addEventListener("wheel", (e) => {
e.preventDefault();
const direction = e.deltaY < 0 ? 1 : -1;
jogFreq(direction);
}, { passive: false });
// Touch drag on jog wheel
let jogTouchY = null;
jogWheel.addEventListener("touchstart", (e) => {
e.preventDefault();
jogTouchY = e.touches[0].clientY;
}, { passive: false });
jogWheel.addEventListener("touchmove", (e) => {
e.preventDefault();
if (jogTouchY === null) return;
const dy = jogTouchY - e.touches[0].clientY;
if (Math.abs(dy) > 12) {
jogFreq(dy > 0 ? 1 : -1);
jogTouchY = e.touches[0].clientY;
}
}, { passive: false });
jogWheel.addEventListener("touchend", () => { jogTouchY = null; });
// Mouse drag on jog wheel
let jogMouseY = null;
jogWheel.addEventListener("mousedown", (e) => {
e.preventDefault();
jogMouseY = e.clientY;
jogWheel.style.cursor = "grabbing";
});
window.addEventListener("mousemove", (e) => {
if (jogMouseY === null) return;
const dy = jogMouseY - e.clientY;
if (Math.abs(dy) > 10) {
jogFreq(dy > 0 ? 1 : -1);
jogMouseY = e.clientY;
}
});
window.addEventListener("mouseup", () => {
jogMouseY = null;
if (jogWheel) jogWheel.style.cursor = "grab";
});
// Step unit selector
jogStepEl.addEventListener("click", (e) => {
const btn = e.target.closest("button[data-step]");
if (!btn) return;
jogUnit = parseInt(btn.dataset.step, 10);
jogStepEl.querySelectorAll("button").forEach((b) => b.classList.remove("active"));
btn.classList.add("active");
applyJogStep();
});
// Step multiplier selector
if (jogMultEl) {
jogMultEl.querySelectorAll("button[data-mult]").forEach((btn) => {
const divisor = parseInt(btn.dataset.mult, 10);
if (!VALID_JOG_DIVISORS.has(divisor)) {
btn.remove();
}
});
jogMultEl.addEventListener("click", (e) => {
const btn = e.target.closest("button[data-mult]");
if (!btn) return;
setJogDivisor(parseInt(btn.dataset.mult, 10));
});
}
// Restore active jog step buttons from saved settings
{
const unitBtns = Array.from(jogStepEl.querySelectorAll("button[data-step]"));
const activeUnit =
unitBtns.find((b) => parseInt(b.dataset.step, 10) === jogUnit) ||
unitBtns.find((b) => parseInt(b.dataset.step, 10) === 1000) ||
unitBtns[0];
if (activeUnit) {
jogUnit = parseInt(activeUnit.dataset.step, 10);
unitBtns.forEach((b) => b.classList.toggle("active", b === activeUnit));
}
if (jogMultEl) {
const multBtns = Array.from(jogMultEl.querySelectorAll("button[data-mult]"));
const activeMult =
multBtns.find((b) => parseInt(b.dataset.mult, 10) === jogMult && VALID_JOG_DIVISORS.has(jogMult)) ||
multBtns.find((b) => parseInt(b.dataset.mult, 10) === 1) ||
multBtns[0];
if (activeMult) {
jogMult = VALID_JOG_DIVISORS.has(parseInt(activeMult.dataset.mult, 10))
? parseInt(activeMult.dataset.mult, 10)
: 1;
multBtns.forEach((b) => b.classList.toggle("active", b === activeMult));
} else {
jogMult = 1;
}
}
jogStep = Math.max(Math.round(jogUnit / jogMult), minFreqStepHz);
}
async function applyModeFromPicker() {
const mode = modeEl.value || "";
if (!mode) {
showHint("Mode missing", 1500);
return;
}
updateWfmControls();
modeEl.disabled = true;
showHint("Setting modeβ¦");
try {
await postPath(`/set_mode?mode=${encodeURIComponent(mode)}`);
showHint("Mode set", 1500);
if (mode.toUpperCase() === "WFM") {
setJogDivisor(10);
}
// Apply sensible default bandwidth for the new mode and push to server.
await applyBwDefaultForMode(mode, true);
} catch (err) {
showHint("Set mode failed", 2000);
console.error(err);
} finally {
modeEl.disabled = false;
}
}
modeEl.addEventListener("change", applyModeFromPicker);
txLimitInput.addEventListener("keydown", (e) => {
if (e.key === "Enter") {
e.preventDefault();
txLimitBtn.click();
}
});
txLimitBtn.addEventListener("click", async () => {
const limit = txLimitInput.value;
if (limit === "" || limit === "--") {
showHint("Limit missing", 1500);
return;
}
txLimitBtn.disabled = true;
showHint("Setting TX limitβ¦");
try {
await postPath(`/set_tx_limit?limit=${encodeURIComponent(limit)}`);
showHint("TX limit set", 1500);
} catch (err) {
showHint("TX limit failed", 2000);
console.error(err);
} finally {
txLimitBtn.disabled = false;
}
});
lockBtn.addEventListener("click", async () => {
lockBtn.disabled = true;
showHint("Toggling lockβ¦");
try {
const nextLock = lockBtn.textContent === "Lock";
await postPath(nextLock ? "/lock" : "/unlock");
showHint("Lock toggled", 1500);
} catch (err) {
showHint("Lock toggle failed", 2000);
console.error(err);
} finally {
lockBtn.disabled = false;
}
});
// --- Filter controls ---
// Per-mode defaults: [default bandwidth Hz, min Hz, max Hz, step Hz]
const MODE_BW_DEFAULTS = {
CW: [500, 50, 2_000, 50],
CWR: [500, 50, 2_000, 50],
LSB: [2_700, 300, 6_000, 100],
USB: [2_700, 300, 6_000, 100],
AM: [6_000, 500, 15_000, 500],
FM: [12_500, 2_500, 25_000, 500],
WFM: [180_000, 50_000,300_000,5_000],
DIG: [3_000, 300, 6_000, 100],
PKT: [3_000, 300, 25_000, 100],
};
const MODE_BW_FALLBACK = [3_000, 300, 500_000, 100];
function mwDefaultsForMode(mode) {
return MODE_BW_DEFAULTS[(mode || "").toUpperCase()] || MODE_BW_FALLBACK;
}
function formatBwLabel(hz) {
if (hz >= 1000) return (hz / 1000).toFixed(hz % 1000 === 0 ? 0 : 1) + " kHz";
return hz + " Hz";
}
// Current receive bandwidth (Hz) β updated by server sync and BW drag.
let currentBandwidthHz = 3_000;
const spectrumBwInput = document.getElementById("spectrum-bw-input");
const spectrumBwSetBtn = document.getElementById("spectrum-bw-set-btn");
const spectrumBwAutoBtn = document.getElementById("spectrum-bw-auto-btn");
function formatBandwidthInputKhz(hz) {
const khz = hz / 1000;
if (Math.abs(Math.round(khz) - khz) < 0.0001) return String(Math.round(khz));
if (Math.abs(Math.round(khz * 10) - khz * 10) < 0.0001) return khz.toFixed(1);
return khz.toFixed(2);
}
function syncBandwidthInput(hz) {
if (!spectrumBwInput || !Number.isFinite(hz) || hz <= 0) return;
const [, minBw, maxBw, stepBw] = mwDefaultsForMode(modeEl ? modeEl.value : "USB");
spectrumBwInput.min = String(minBw / 1000);
spectrumBwInput.max = String(maxBw / 1000);
spectrumBwInput.step = String(stepBw / 1000);
spectrumBwInput.value = formatBandwidthInputKhz(hz);
}
// Apply mode-specific BW default and optionally push to server.
async function applyBwDefaultForMode(mode, sendToServer) {
const [def] = mwDefaultsForMode(mode);
currentBandwidthHz = def;
syncBandwidthInput(def);
if (sendToServer) {
try { await postPath(`/set_bandwidth?hz=${def}`); } catch (_) {}
}
}
async function applyBandwidthFromInput() {
if (!spectrumBwInput) return;
const [, minBw, maxBw] = mwDefaultsForMode(modeEl ? modeEl.value : "USB");
const nextKhz = Number(spectrumBwInput.value);
const next = Math.round(nextKhz * 1000);
if (!Number.isFinite(next) || next <= 0) {
syncBandwidthInput(currentBandwidthHz);
return;
}
const clamped = Math.max(minBw, Math.min(maxBw, next));
currentBandwidthHz = clamped;
syncBandwidthInput(clamped);
if (lastSpectrumData) scheduleSpectrumDraw();
try { await postPath(`/set_bandwidth?hz=${clamped}`); } catch (_) {}
}
function estimateBandwidthAroundPeak(data, centerHz) {
if (!data || !Array.isArray(data.bins) || data.bins.length < 3 || !Number.isFinite(centerHz)) {
return null;
}
const bins = data.bins;
const maxIdx = bins.length - 1;
const fullLoHz = data.center_hz - data.sample_rate / 2;
const centerIdx = Math.max(
1,
Math.min(maxIdx - 1, Math.round(((centerHz - fullLoHz) / data.sample_rate) * maxIdx)),
);
const searchRadius = Math.max(6, Math.min(120, Math.round(maxIdx * 0.03)));
const searchLo = Math.max(1, centerIdx - searchRadius);
const searchHi = Math.min(maxIdx - 1, centerIdx + searchRadius);
let peakIdx = centerIdx;
for (let i = searchLo; i <= searchHi; i++) {
if (bins[i] > bins[peakIdx]) peakIdx = i;
}
const sorted = [...bins].sort((a, b) => a - b);
const noise = sorted[Math.floor(sorted.length * 0.2)];
const peak = bins[peakIdx];
const threshold = Math.max(noise + 4, peak - Math.max(8, (peak - noise) * 0.35));
let left = peakIdx;
let right = peakIdx;
let belowCount = 0;
for (let i = peakIdx; i > 1; i--) {
if (bins[i] < threshold) belowCount += 1;
else belowCount = 0;
if (belowCount >= 2) break;
left = i;
}
belowCount = 0;
for (let i = peakIdx; i < maxIdx - 1; i++) {
if (bins[i] < threshold) belowCount += 1;
else belowCount = 0;
if (belowCount >= 2) break;
right = i;
}
const shoulderPad = Math.max(1, Math.round((right - left) * 0.08));
left = Math.max(0, left - shoulderPad);
right = Math.min(maxIdx, right + shoulderPad);
const hzPerBin = data.sample_rate / maxIdx;
const rawBw = Math.max(hzPerBin, (right - left) * hzPerBin);
const [, minBw, maxBw, stepBw] = mwDefaultsForMode(modeEl ? modeEl.value : "USB");
const clamped = Math.max(minBw, Math.min(maxBw, rawBw));
return Math.max(stepBw, Math.round(clamped / stepBw) * stepBw);
}
async function applyAutoBandwidth() {
if (!lastSpectrumData || lastFreqHz == null) return;
const estimated = estimateBandwidthAroundPeak(lastSpectrumData, lastFreqHz);
if (!Number.isFinite(estimated) || estimated <= 0) {
syncBandwidthInput(currentBandwidthHz);
return;
}
currentBandwidthHz = estimated;
syncBandwidthInput(estimated);
if (lastSpectrumData) scheduleSpectrumDraw();
try {
await postPath(`/set_bandwidth?hz=${estimated}`);
} catch (_) {}
}
if (spectrumBwInput) {
spectrumBwInput.addEventListener("keydown", (e) => {
if (e.key === "Enter") {
e.preventDefault();
applyBandwidthFromInput();
}
});
}
if (spectrumBwSetBtn) {
spectrumBwSetBtn.addEventListener("click", () => { applyBandwidthFromInput(); });
}
if (spectrumBwAutoBtn) {
spectrumBwAutoBtn.addEventListener("click", () => { applyAutoBandwidth(); });
}
// --- Tab navigation ---
document.querySelector(".tab-bar").addEventListener("click", (e) => {
const btn = e.target.closest(".tab[data-tab]");
if (!btn) return;
if (authEnabled && !authRole && btn.dataset.tab !== "main") return;
document.querySelectorAll(".tab-bar .tab").forEach((t) => t.classList.remove("active"));
btn.classList.add("active");
document.querySelectorAll(".tab-panel").forEach((p) => p.style.display = "none");
document.getElementById(`tab-${btn.dataset.tab}`).style.display = "";
if (btn.dataset.tab === "map") {
initAprsMap();
sizeAprsMapToViewport();
if (aprsMap) setTimeout(() => aprsMap.invalidateSize(), 50);
}
});
// --- Auth startup sequence ---
async function initializeApp() {
showAuthGate(false);
const authStatus = await checkAuthStatus();
authEnabled = !authStatus.auth_disabled;
if (!authEnabled) {
authRole = "control";
hideAuthGate();
updateAuthUI();
connect();
resizeHeaderSignalCanvas();
startHeaderSignalSampling();
return;
}
if (authStatus.authenticated) {
// User has valid session
authRole = authStatus.role;
hideAuthGate();
updateAuthUI();
applyAuthRestrictions();
connect();
resizeHeaderSignalCanvas();
startHeaderSignalSampling();
} else {
// No valid session - show auth gate
// Guest button is shown if guest mode is available (role granted without auth)
const allowGuest = authStatus.role === "rx";
showAuthGate(allowGuest);
}
}
// Setup auth form
document.getElementById("auth-form").addEventListener("submit", async (e) => {
e.preventDefault();
const passphrase = document.getElementById("auth-passphrase").value;
const btn = document.querySelector("#auth-form button[type=submit]");
btn.disabled = true;
btn.textContent = "Logging in...";
try {
const result = await authLogin(passphrase);
authRole = result.role;
document.getElementById("auth-passphrase").value = "";
hideAuthGate();
updateAuthUI();
applyAuthRestrictions();
connect();
resizeHeaderSignalCanvas();
startHeaderSignalSampling();
} catch (err) {
showAuthError("Invalid passphrase");
console.error("Login error:", err);
} finally {
btn.disabled = false;
btn.textContent = "Login";
}
});
// Setup guest button
const guestBtn = document.getElementById("auth-guest-btn");
if (guestBtn) {
guestBtn.addEventListener("click", async () => {
authRole = "rx";
document.getElementById("auth-passphrase").value = "";
hideAuthGate();
updateAuthUI();
applyAuthRestrictions();
connect();
resizeHeaderSignalCanvas();
startHeaderSignalSampling();
});
}
// Setup header auth button (Login/Logout)
const headerAuthBtn = document.getElementById("header-auth-btn");
if (headerAuthBtn) {
headerAuthBtn.addEventListener("click", async () => {
if (authRole) {
// Logged in - show logout confirmation
if (confirm("Are you sure you want to logout?")) {
await authLogout();
}
} else {
// Not logged in - show auth gate
showAuthGate(false);
}
});
}
// Start the app
initializeApp();
window.addEventListener("resize", resizeHeaderSignalCanvas);
// --- Leaflet Map (lazy-initialized) ---
let aprsMap = null;
let aprsMapBaseLayer = null;
let aprsMapReceiverMarker = null;
const stationMarkers = new Map();
const locatorMarkers = new Map();
const mapMarkers = new Set();
const mapFilter = { aprs: true, ft8: true, wspr: true };
function mapTileSpecForTheme(theme) {
if (theme === "dark") {
return {
url: "https://{s}.basemaps.cartocdn.com/dark_all/{z}/{x}/{y}{r}.png",
options: {
maxZoom: 19,
subdomains: "abcd",
attribution: '© OpenStreetMap © CARTO',
},
};
}
return {
url: "https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png",
options: {
maxZoom: 19,
attribution: '© OpenStreetMap',
},
};
}
function updateMapBaseLayerForTheme(theme) {
if (!aprsMap) return;
if (aprsMapBaseLayer) {
aprsMap.removeLayer(aprsMapBaseLayer);
aprsMapBaseLayer = null;
}
const spec = mapTileSpecForTheme(theme);
aprsMapBaseLayer = L.tileLayer(spec.url, spec.options).addTo(aprsMap);
}
function initAprsMap() {
const mapEl = document.getElementById("aprs-map");
if (!mapEl) return;
sizeAprsMapToViewport();
if (aprsMap) return;
const hasLocation = serverLat != null && serverLon != null;
const center = hasLocation ? [serverLat, serverLon] : [20, 0];
const zoom = hasLocation ? 10 : 2;
aprsMap = L.map("aprs-map").setView(center, zoom);
updateMapBaseLayerForTheme(currentTheme());
if (hasLocation) {
const popupText = serverCallsign ? serverCallsign : "Receiver";
aprsMapReceiverMarker = L.circleMarker([serverLat, serverLon], {
radius: 8, color: "#3388ff", fillColor: "#3388ff", fillOpacity: 0.8
}).addTo(aprsMap).bindPopup(popupText);
}
const aprsFilter = document.getElementById("map-filter-aprs");
const ft8Filter = document.getElementById("map-filter-ft8");
const wsprFilter = document.getElementById("map-filter-wspr");
if (aprsFilter) {
aprsFilter.addEventListener("change", () => {
mapFilter.aprs = aprsFilter.checked;
applyMapFilter();
});
}
if (ft8Filter) {
ft8Filter.addEventListener("change", () => {
mapFilter.ft8 = ft8Filter.checked;
applyMapFilter();
});
}
if (wsprFilter) {
wsprFilter.addEventListener("change", () => {
mapFilter.wspr = wsprFilter.checked;
applyMapFilter();
});
}
}
function sizeAprsMapToViewport() {
const mapEl = document.getElementById("aprs-map");
if (!mapEl) return;
const topPadding = parseFloat(getComputedStyle(document.body).paddingTop) || 0;
const available = Math.max(0, window.innerHeight - topPadding);
const target = Math.max(150, Math.floor(available * 0.6));
mapEl.style.height = `${target}px`;
if (aprsMap) aprsMap.invalidateSize();
}
function aprsSymbolIcon(symbolTable, symbolCode) {
if (!symbolTable || !symbolCode) return null;
const sheet = symbolTable === "/" ? 0 : 1;
const code = symbolCode.charCodeAt(0) - 33;
const col = code % 16;
const row = Math.floor(code / 16);
const bgX = -(col * 24);
const bgY = -(row * 24);
const url = `https://raw.githubusercontent.com/hessu/aprs-symbols/master/png/aprs-symbols-24-${sheet}.png`;
return L.divIcon({
className: "",
html: ``,
iconSize: [24, 24],
iconAnchor: [12, 12],
popupAnchor: [0, -12]
});
}
window.aprsMapAddStation = function(call, lat, lon, info, symbolTable, symbolCode) {
if (!aprsMap) initAprsMap();
if (!aprsMap) return;
const popupContent = `${call}
${info}`;
const existing = stationMarkers.get(call);
if (existing) {
existing.marker.setLatLng([lat, lon]);
existing.marker.setPopupContent(popupContent);
} else {
const icon = aprsSymbolIcon(symbolTable, symbolCode);
const marker = icon
? L.marker([lat, lon], { icon }).addTo(aprsMap).bindPopup(popupContent)
: L.circleMarker([lat, lon], {
radius: 6, color: "#00d17f", fillColor: "#00d17f", fillOpacity: 0.8
}).addTo(aprsMap).bindPopup(popupContent);
marker.__trxType = "aprs";
stationMarkers.set(call, { marker, type: "aprs" });
mapMarkers.add(marker);
applyMapFilter();
}
};
function maidenheadToBounds(grid) {
if (!grid || grid.length < 4) return null;
const g = grid.toUpperCase();
const A = "A".charCodeAt(0);
const fieldLon = (g.charCodeAt(0) - A) * 20 - 180;
const fieldLat = (g.charCodeAt(1) - A) * 10 - 90;
const squareLon = parseInt(g[2], 10) * 2;
const squareLat = parseInt(g[3], 10) * 1;
let lon = fieldLon + squareLon;
let lat = fieldLat + squareLat;
let lonSpan = 2;
let latSpan = 1;
if (g.length >= 6) {
const subLon = (g.charCodeAt(4) - A) * (5 / 60);
const subLat = (g.charCodeAt(5) - A) * (2.5 / 60);
lon += subLon;
lat += subLat;
lonSpan = 5 / 60;
latSpan = 2.5 / 60;
}
return [
[lat, lon],
[lat + latSpan, lon + lonSpan],
];
}
function applyMapFilter() {
if (!aprsMap) return;
mapMarkers.forEach((marker) => {
const type = marker.__trxType;
const visible =
(type === "aprs" && mapFilter.aprs) ||
(type === "ft8" && mapFilter.ft8) ||
(type === "wspr" && mapFilter.wspr);
const onMap = aprsMap.hasLayer(marker);
if (visible && !onMap) marker.addTo(aprsMap);
if (!visible && onMap) marker.removeFrom(aprsMap);
});
}
function escapeMapHtml(input) {
return String(input)
.replaceAll("&", "&")
.replaceAll("<", "<")
.replaceAll(">", ">")
.replaceAll("\"", """);
}
function locatorStyleForCount(count, type) {
const safeCount = Math.max(1, Number.isFinite(count) ? count : 1);
const intensity = Math.min(1, Math.log2(safeCount + 1) / 5);
const isWspr = type === "wspr";
return {
color: isWspr ? "#ff8f2a" : "#ffb020",
opacity: 0.45 + intensity * 0.5,
weight: 1 + intensity * 1.2,
fillColor: isWspr ? "#ff6a3d" : "#ff9b1a",
fillOpacity: 0.18 + intensity * 0.55,
};
}
window.ft8MapAddLocator = function(message, grids, type = "ft8", station = null) {
if (!aprsMap) initAprsMap();
if (!aprsMap) return;
if (!Array.isArray(grids) || grids.length === 0) return;
const markerType = type === "wspr" ? "wspr" : "ft8";
const unique = [...new Set(grids.map((g) => String(g).toUpperCase()))];
const locatorsLines = unique.map((g) => escapeMapHtml(g)).join("
");
for (const grid of unique) {
const bounds = maidenheadToBounds(grid);
if (!bounds) continue;
const key = `${markerType}:${grid}`;
const stationId = station && String(station).trim() ? String(station).trim().toUpperCase() : "";
const existing = locatorMarkers.get(key);
if (existing) {
if (stationId) existing.stations.add(stationId);
const count = existing.stations.size || 1;
existing.marker.setStyle(locatorStyleForCount(count, markerType));
existing.marker.setPopupContent(
`${escapeMapHtml(grid)}
Stations: ${count}
${locatorsLines}`
);
continue;
}
const stations = new Set();
if (stationId) stations.add(stationId);
const count = stations.size || 1;
const marker = L.rectangle(bounds, locatorStyleForCount(count, markerType))
.addTo(aprsMap)
.bindPopup(`${escapeMapHtml(grid)}
Stations: ${count}
${locatorsLines}`);
marker.__trxType = markerType;
locatorMarkers.set(key, { marker, stations });
mapMarkers.add(marker);
}
applyMapFilter();
};
// --- Sub-tab navigation (Plugins tab) ---
document.querySelectorAll(".sub-tab-bar").forEach((bar) => {
bar.addEventListener("click", (e) => {
const btn = e.target.closest(".sub-tab[data-subtab]");
if (!btn) return;
bar.querySelectorAll(".sub-tab").forEach((t) => t.classList.remove("active"));
btn.classList.add("active");
const parent = bar.parentElement;
parent.querySelectorAll(".sub-tab-panel").forEach((p) => p.style.display = "none");
parent.querySelector(`#subtab-${btn.dataset.subtab}`).style.display = "";
});
});
window.addEventListener("resize", () => {
const mapTab = document.getElementById("tab-map");
if (!mapTab || mapTab.style.display === "none") return;
sizeAprsMapToViewport();
});
// --- Signal measurement ---
const sigMeasureBtn = document.getElementById("sig-measure-btn");
const sigClearBtn = document.getElementById("sig-clear-btn");
const sigResult = document.getElementById("sig-result");
function resetSignalMeasurementState() {
sigMeasureLastTickMs = 0;
sigMeasureAccumMs = 0;
sigMeasureWeighted = 0;
sigMeasurePeak = null;
}
function updateSignalMeasurement(nowMs) {
if (!sigMeasuring) return;
if (sigMeasureLastTickMs === 0) {
sigMeasureLastTickMs = nowMs;
return;
}
const dt = Math.max(0, nowMs - sigMeasureLastTickMs);
sigMeasureLastTickMs = nowMs;
if (!Number.isFinite(sigLastSUnits)) return;
sigMeasureAccumMs += dt;
sigMeasureWeighted += sigLastSUnits * dt;
if (sigMeasurePeak === null || sigLastSUnits > sigMeasurePeak) {
sigMeasurePeak = sigLastSUnits;
}
}
function stopSignalMeasurement() {
if (sigMeasureTimer) {
clearInterval(sigMeasureTimer);
sigMeasureTimer = null;
}
sigMeasuring = false;
sigMeasureBtn.textContent = "Measure";
sigMeasureBtn.style.borderColor = "";
sigMeasureBtn.style.color = "";
}
sigMeasureBtn.addEventListener("click", () => {
if (!sigMeasuring) {
resetSignalMeasurementState();
sigMeasuring = true;
sigMeasureBtn.textContent = "Stop (0.0s)";
sigMeasureBtn.style.borderColor = "#00d17f";
sigMeasureBtn.style.color = "#00d17f";
sigMeasureTimer = setInterval(() => {
const now = Date.now();
updateSignalMeasurement(now);
sigMeasureBtn.textContent = `Stop (${(sigMeasureAccumMs / 1000).toFixed(1)}s)`;
}, 200);
} else {
updateSignalMeasurement(Date.now());
stopSignalMeasurement();
if (sigMeasureAccumMs > 0) {
const avg = sigMeasureWeighted / sigMeasureAccumMs;
const peak = sigMeasurePeak;
sigResult.textContent = `Avg ${formatSignal(avg)} / Peak ${formatSignal(peak)} (${(sigMeasureAccumMs / 1000).toFixed(1)}s)`;
}
}
});
sigClearBtn.addEventListener("click", () => {
stopSignalMeasurement();
resetSignalMeasurementState();
sigResult.textContent = "";
});
// --- Audio streaming ---
const rxAudioBtn = document.getElementById("rx-audio-btn");
const txAudioBtn = document.getElementById("tx-audio-btn");
const audioStatus = document.getElementById("audio-status");
const audioLevelFill = document.getElementById("audio-level-fill");
const audioRow = document.getElementById("audio-row");
const wfmControlsCol = document.getElementById("wfm-controls-col");
const wfmDeemphasisEl = document.getElementById("wfm-deemphasis");
const wfmAudioModeEl = document.getElementById("wfm-audio-mode");
// Hide audio row if audio is not configured on the server
fetch("/audio", { method: "GET" }).then((r) => {
if (r.status === 404) audioRow.style.display = "none";
}).catch(() => {});
let audioWs = null;
let audioCtx = null;
let rxActive = false;
let txActive = false;
let txStream = null;
let txProcessor = null;
let streamInfo = null;
let opusDecoder = null;
let txEncoder = null;
let nextPlayTime = 0;
let lastLevelUpdate = 0;
let rxGainNode = null;
let txGainNode = null;
const rxVolSlider = document.getElementById("rx-vol");
const txVolSlider = document.getElementById("tx-vol");
const TX_TIMEOUT_SECS = 120;
let txTimeoutTimer = null;
let txTimeoutRemaining = 0;
let txTimeoutInterval = null;
const hasWebCodecs = typeof AudioDecoder !== "undefined" && typeof AudioEncoder !== "undefined";
const MAX_RX_BUFFER_SECS = 0.25;
const TARGET_RX_BUFFER_SECS = 0.04;
const MIN_RX_JITTER_SAMPLES = 512;
if (wfmAudioModeEl) {
wfmAudioModeEl.value = loadSetting("wfmAudioMode", "stereo");
wfmAudioModeEl.addEventListener("change", () => {
saveSetting("wfmAudioMode", wfmAudioModeEl.value);
});
}
if (wfmDeemphasisEl) {
wfmDeemphasisEl.addEventListener("change", () => {
postPath(`/set_wfm_deemphasis?us=${encodeURIComponent(wfmDeemphasisEl.value)}`).catch(() => {});
});
}
function updateWfmControls() {
if (!wfmControlsCol) return;
const mode = (modeEl && modeEl.value ? modeEl.value : "").toUpperCase();
wfmControlsCol.style.display = mode === "WFM" ? "" : "none";
}
// Show compatibility warning for non-Chromium browsers
if (!hasWebCodecs) {
rxAudioBtn.disabled = true;
txAudioBtn.disabled = true;
audioStatus.textContent = "Audio requires Chrome/Edge";
}
function resetTxTimeout() {
txTimeoutRemaining = TX_TIMEOUT_SECS;
if (txTimeoutTimer) clearTimeout(txTimeoutTimer);
txTimeoutTimer = setTimeout(() => {
console.warn("PTT safety timeout β stopping TX");
stopTxAudio();
}, TX_TIMEOUT_SECS * 1000);
}
function startTxTimeoutCountdown() {
txTimeoutRemaining = TX_TIMEOUT_SECS;
if (txTimeoutInterval) clearInterval(txTimeoutInterval);
txTimeoutInterval = setInterval(() => {
txTimeoutRemaining--;
if (txTimeoutRemaining <= 10 && txTimeoutRemaining > 0 && txActive) {
audioStatus.textContent = `TX timeout ${txTimeoutRemaining}s`;
}
}, 1000);
}
function clearTxTimeout() {
if (txTimeoutTimer) { clearTimeout(txTimeoutTimer); txTimeoutTimer = null; }
if (txTimeoutInterval) { clearInterval(txTimeoutInterval); txTimeoutInterval = null; }
txTimeoutRemaining = 0;
}
function startRxAudio() {
if (rxActive) { stopRxAudio(); return; }
if (!hasWebCodecs) {
audioStatus.textContent = "Audio requires Chrome/Edge";
return;
}
const proto = location.protocol === "https:" ? "wss:" : "ws:";
audioWs = new WebSocket(`${proto}//${location.host}/audio`);
audioWs.binaryType = "arraybuffer";
audioStatus.textContent = "Connectingβ¦";
audioWs.onopen = () => {
audioStatus.textContent = "Connected";
};
audioWs.onmessage = (evt) => {
if (typeof evt.data === "string") {
// Stream info JSON
try {
streamInfo = JSON.parse(evt.data);
updateWfmControls();
audioCtx = new AudioContext({ sampleRate: streamInfo.sample_rate || 48000 });
audioCtx.resume().catch(() => {});
rxGainNode = audioCtx.createGain();
rxGainNode.gain.value = rxVolSlider.value / 100;
rxGainNode.connect(audioCtx.destination);
rxActive = true;
rxAudioBtn.style.borderColor = "#00d17f";
rxAudioBtn.style.color = "#00d17f";
audioStatus.textContent = "RX";
} catch (e) {
console.error("Audio stream info parse error", e);
}
return;
}
// Binary Opus data β decode via WebCodecs AudioDecoder if available
if (!audioCtx) return;
const data = new Uint8Array(evt.data);
// Throttle level indicator updates to max 10/sec
const now = Date.now();
if (now - lastLevelUpdate >= 100) {
const level = Math.min(100, (data.length / 120) * 100);
audioLevelFill.style.width = `${level}%`;
lastLevelUpdate = now;
}
// Use WebCodecs AudioDecoder for Opus if available
if (typeof AudioDecoder !== "undefined" && !opusDecoder) {
try {
const channels = (streamInfo && streamInfo.channels) || 1;
const sampleRate = (streamInfo && streamInfo.sample_rate) || 48000;
opusDecoder = new AudioDecoder({
output: (frame) => {
const forceMono = frame.numberOfChannels >= 2
&& wfmAudioModeEl
&& wfmAudioModeEl.value === "mono"
&& modeEl
&& (modeEl.value || "").toUpperCase() === "WFM";
const outChannels = forceMono ? 1 : frame.numberOfChannels;
const ab = audioCtx.createBuffer(outChannels, frame.numberOfFrames, frame.sampleRate);
if (forceMono) {
// Mix all planes down to mono
const monoData = new Float32Array(frame.numberOfFrames);
for (let ch = 0; ch < frame.numberOfChannels; ch++) {
const plane = new Float32Array(frame.numberOfFrames);
frame.copyTo(plane, { planeIndex: ch });
for (let i = 0; i < frame.numberOfFrames; i++) monoData[i] += plane[i];
}
const inv = 1 / frame.numberOfChannels;
for (let i = 0; i < frame.numberOfFrames; i++) monoData[i] *= inv;
ab.copyToChannel(monoData, 0);
} else {
// Copy each plane directly β AudioData uses planar layout (f32-planar)
for (let ch = 0; ch < frame.numberOfChannels; ch++) {
const chData = new Float32Array(frame.numberOfFrames);
frame.copyTo(chData, { planeIndex: ch });
ab.copyToChannel(chData, ch);
}
}
const src = audioCtx.createBufferSource();
src.buffer = ab;
src.connect(rxGainNode);
const now = audioCtx.currentTime;
const sampleRate = (streamInfo && streamInfo.sample_rate) || frame.sampleRate || 48000;
const minLeadSecs = Math.max(0, MIN_RX_JITTER_SAMPLES / Math.max(1, sampleRate));
const targetLeadSecs = Math.max(TARGET_RX_BUFFER_SECS, minLeadSecs);
if (nextPlayTime && nextPlayTime - now > MAX_RX_BUFFER_SECS) {
nextPlayTime = now + targetLeadSecs;
}
if (!nextPlayTime || nextPlayTime < now + minLeadSecs) {
nextPlayTime = now + targetLeadSecs;
}
const schedTime = nextPlayTime || (now + targetLeadSecs);
src.start(schedTime);
nextPlayTime = schedTime + ab.duration;
frame.close();
},
error: (e) => { console.error("AudioDecoder error", e); }
});
opusDecoder.configure({
codec: "opus",
sampleRate: sampleRate,
numberOfChannels: channels,
});
} catch (e) {
console.warn("WebCodecs AudioDecoder not available for Opus", e);
opusDecoder = null;
}
}
if (opusDecoder) {
try {
opusDecoder.decode(new EncodedAudioChunk({
type: "key",
timestamp: performance.now() * 1000,
data: data,
}));
} catch (e) {
// Ignore decode errors for individual frames
}
}
};
audioWs.onclose = () => {
// If TX was active when WS closed, release PTT
if (txActive) { stopTxAudio(); }
rxActive = false;
streamInfo = null;
updateWfmControls();
rxAudioBtn.style.borderColor = "";
rxAudioBtn.style.color = "";
audioStatus.textContent = "Off";
audioLevelFill.style.width = "0%";
rxGainNode = null;
if (opusDecoder) {
try { opusDecoder.close(); } catch(e) {}
opusDecoder = null;
}
nextPlayTime = 0;
};
audioWs.onerror = () => {
audioStatus.textContent = "Error";
};
}
function stopRxAudio() {
rxActive = false;
streamInfo = null;
if (audioWs) { audioWs.close(); audioWs = null; }
if (audioCtx) { audioCtx.close(); audioCtx = null; }
updateWfmControls();
rxGainNode = null;
if (opusDecoder) {
try { opusDecoder.close(); } catch(e) {}
opusDecoder = null;
}
nextPlayTime = 0;
rxAudioBtn.style.borderColor = "";
rxAudioBtn.style.color = "";
audioStatus.textContent = "Off";
audioLevelFill.style.width = "0%";
}
function startTxAudio() {
if (txActive) { stopTxAudio(); return; }
if (!hasWebCodecs) {
audioStatus.textContent = "Audio requires Chrome/Edge";
return;
}
if (!audioWs || audioWs.readyState !== WebSocket.OPEN) {
audioStatus.textContent = "RX first";
return;
}
if (!streamInfo) return;
navigator.mediaDevices.getUserMedia({
audio: { sampleRate: streamInfo.sample_rate || 48000, channelCount: streamInfo.channels || 1 }
}).then(async (stream) => {
txStream = stream;
txActive = true;
txAudioBtn.style.borderColor = "#e55353";
txAudioBtn.style.color = "#e55353";
audioStatus.textContent = "RX+TX";
// Start PTT safety timeout
resetTxTimeout();
startTxTimeoutCountdown();
// Engage PTT automatically
try { await postPath("/set_ptt?ptt=true"); } catch (e) { console.error("PTT on failed", e); }
const sampleRate = streamInfo.sample_rate || 48000;
const channels = streamInfo.channels || 1;
const encoder = new AudioEncoder({
output: (chunk) => {
const buf = new ArrayBuffer(chunk.byteLength);
chunk.copyTo(buf);
if (audioWs && audioWs.readyState === WebSocket.OPEN) {
audioWs.send(buf);
}
},
error: (e) => { console.error("AudioEncoder error", e); }
});
encoder.configure({
codec: "opus",
sampleRate: sampleRate,
numberOfChannels: channels,
bitrate: (streamInfo.bitrate_bps || 24000),
});
txEncoder = encoder;
// Use AudioWorklet or ScriptProcessor to feed encoder
if (!audioCtx) audioCtx = new AudioContext({ sampleRate: sampleRate });
const source = audioCtx.createMediaStreamSource(stream);
const frameDuration = (streamInfo.frame_duration_ms || 20) / 1000;
const frameSize = Math.floor(sampleRate * frameDuration);
// Use ScriptProcessorNode (deprecated but widely supported)
const processor = audioCtx.createScriptProcessor(frameSize, channels, channels);
let tsCounter = 0;
processor.onaudioprocess = (e) => {
if (!txActive || !txEncoder) return;
const input = e.inputBuffer;
// Reset PTT safety timeout on each audio callback
resetTxTimeout();
// Use mono (channel 0) for f32-planar format
const monoData = input.getChannelData(0);
try {
const frame = new AudioData({
format: "f32-planar",
sampleRate: input.sampleRate,
numberOfFrames: input.length,
numberOfChannels: 1,
timestamp: tsCounter,
data: monoData,
});
tsCounter += (input.length / input.sampleRate) * 1_000_000;
txEncoder.encode(frame);
frame.close();
} catch (e) {
// Ignore
}
};
txGainNode = audioCtx.createGain();
txGainNode.gain.value = txVolSlider.value / 100;
source.connect(txGainNode);
txGainNode.connect(processor);
processor.connect(audioCtx.destination);
txProcessor = { source, processor };
}).catch((err) => {
console.error("getUserMedia failed:", err);
audioStatus.textContent = "Mic denied";
});
}
async function stopTxAudio() {
if (!txActive) return;
txActive = false;
clearTxTimeout();
// Release PTT automatically
try { await postPath("/set_ptt?ptt=false"); } catch (e) { console.error("PTT off failed", e); }
if (txStream) {
txStream.getTracks().forEach(t => t.stop());
txStream = null;
}
if (txProcessor) {
txProcessor.source.disconnect();
txProcessor.processor.disconnect();
txProcessor = null;
}
if (txEncoder) {
try { txEncoder.close(); } catch(e) {}
txEncoder = null;
}
txGainNode = null;
txAudioBtn.style.borderColor = "";
txAudioBtn.style.color = "";
audioStatus.textContent = rxActive ? "RX" : "Off";
}
rxAudioBtn.addEventListener("click", startRxAudio);
txAudioBtn.addEventListener("click", startTxAudio);
const rxVolPct = document.getElementById("rx-vol-pct");
const txVolPct = document.getElementById("tx-vol-pct");
// Restore saved volumes
rxVolSlider.value = loadSetting("rxVol", 80);
txVolSlider.value = loadSetting("txVol", 80);
rxVolPct.textContent = `${rxVolSlider.value}%`;
txVolPct.textContent = `${txVolSlider.value}%`;
function updateVolSlider(slider, pctEl, gainNode) {
pctEl.textContent = `${slider.value}%`;
if (gainNode) gainNode.gain.value = slider.value / 100;
}
rxVolSlider.addEventListener("input", () => { updateVolSlider(rxVolSlider, rxVolPct, rxGainNode); saveSetting("rxVol", Number(rxVolSlider.value)); });
txVolSlider.addEventListener("input", () => { updateVolSlider(txVolSlider, txVolPct, txGainNode); saveSetting("txVol", Number(txVolSlider.value)); });
function volWheel(slider, pctEl, getGain, storageKey) {
slider.addEventListener("wheel", (e) => {
e.preventDefault();
const step = e.deltaY < 0 ? 2 : -2;
slider.value = Math.max(0, Math.min(100, Number(slider.value) + step));
updateVolSlider(slider, pctEl, getGain());
saveSetting(storageKey, Number(slider.value));
}, { passive: false });
}
volWheel(rxVolSlider, rxVolPct, () => rxGainNode, "rxVol");
volWheel(txVolSlider, txVolPct, () => txGainNode, "txVol");
document.getElementById("copyright-year").textContent = new Date().getFullYear();
// --- Server-side decode SSE ---
let decodeSource = null;
let decodeConnected = false;
function updateDecodeStatus(text) {
const aprs = document.getElementById("aprs-status");
const cw = document.getElementById("cw-status");
const ft8 = document.getElementById("ft8-status");
if (aprs && aprs.textContent !== "Receiving") aprs.textContent = text;
if (cw && cw.textContent !== "Receiving") cw.textContent = text;
if (ft8 && ft8.textContent !== "Receiving") ft8.textContent = text;
}
function connectDecode() {
if (decodeSource) { decodeSource.close(); }
decodeSource = new EventSource("/decode");
decodeSource.onopen = () => {
decodeConnected = true;
updateDecodeStatus("Connected, listening for packets");
};
decodeSource.onmessage = (evt) => {
try {
const msg = JSON.parse(evt.data);
if (msg.type === "aprs" && window.onServerAprs) window.onServerAprs(msg);
if (msg.type === "cw" && window.onServerCw) window.onServerCw(msg);
if (msg.type === "ft8" && window.onServerFt8) window.onServerFt8(msg);
if (msg.type === "wspr" && window.onServerWspr) window.onServerWspr(msg);
} catch (e) {
// ignore parse errors
}
};
decodeSource.onerror = () => {
// readyState CLOSED (2) = server rejected (404/error), CONNECTING (0) = temporary drop
const wasClosed = decodeSource.readyState === 2;
decodeSource.close();
decodeConnected = false;
if (wasClosed) {
updateDecodeStatus("Decode not available (check client audio config)");
setTimeout(connectDecode, 10000);
} else {
updateDecodeStatus("Decode disconnected, retryingβ¦");
setTimeout(connectDecode, 5000);
}
};
}
connectDecode();
// Release PTT on page unload to prevent stuck transmit
window.addEventListener("beforeunload", () => {
if (txActive) {
navigator.sendBeacon("/set_ptt?ptt=false", "");
}
});
// ββ Spectrum display βββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
const spectrumCanvas = document.getElementById("spectrum-canvas");
const spectrumFreqAxis = document.getElementById("spectrum-freq-axis");
const spectrumTooltip = document.getElementById("spectrum-tooltip");
let spectrumSource = null;
let spectrumReconnectTimer = null;
let spectrumDrawPending = false;
let spectrumAxisKey = "";
// Zoom / pan state. zoom >= 1; panFrac in [0,1] is the fraction of the full
// bandwidth at the centre of the visible window.
let spectrumZoom = 1;
let spectrumPanFrac = 0.5;
// Y-axis level: floor = bottom dB value shown; range = total dB span.
let spectrumFloor = -115;
let spectrumRange = 80;
// BW-strip drag state.
let _bwDragEdge = null; // "left" | "right" | null
let _bwDragStartX = 0;
let _bwDragStartBwHz = 0;
function spectrumBgColor() {
return canvasPalette().bg;
}
// Returns { loHz, hiHz, visLoHz, visHiHz, fullSpanHz, visSpanHz } and clamps
// panFrac so the view never scrolls past the edges.
function spectrumVisibleRange(data) {
const fullSpanHz = data.sample_rate;
const loHz = data.center_hz - fullSpanHz / 2;
const halfVis = 0.5 / spectrumZoom;
spectrumPanFrac = Math.min(Math.max(spectrumPanFrac, halfVis), 1 - halfVis);
const visCenterHz = loHz + spectrumPanFrac * fullSpanHz;
const visSpanHz = fullSpanHz / spectrumZoom;
return {
loHz,
hiHz: loHz + fullSpanHz,
visLoHz: visCenterHz - visSpanHz / 2,
visHiHz: visCenterHz + visSpanHz / 2,
fullSpanHz,
visSpanHz,
};
}
function canvasXToHz(cssX, cssW, range) {
return range.visLoHz + (cssX / cssW) * range.visSpanHz;
}
function nearestSpectrumPeak(cssX, cssW, data) {
if (!data || !Array.isArray(data.bins) || data.bins.length === 0 || cssW <= 0) {
return null;
}
const bins = data.bins;
const maxIdx = bins.length - 1;
const range = spectrumVisibleRange(data);
const fullLoHz = data.center_hz - data.sample_rate / 2;
const targetHz = canvasXToHz(cssX, cssW, range);
const targetIdx = Math.max(
0,
Math.min(maxIdx, Math.round(((targetHz - fullLoHz) / data.sample_rate) * maxIdx)),
);
const visStartIdx = Math.max(
0,
Math.min(maxIdx, Math.floor(((range.visLoHz - fullLoHz) / data.sample_rate) * maxIdx)),
);
const visEndIdx = Math.max(
visStartIdx,
Math.min(maxIdx, Math.ceil(((range.visHiHz - fullLoHz) / data.sample_rate) * maxIdx)),
);
const visSpanBins = Math.max(1, visEndIdx - visStartIdx);
const searchRadius = Math.max(3, Math.min(80, Math.round((24 / cssW) * visSpanBins)));
const searchLo = Math.max(1, targetIdx - searchRadius);
const searchHi = Math.min(maxIdx - 1, targetIdx + searchRadius);
let windowMax = -Infinity;
const localPeaks = [];
for (let i = searchLo; i <= searchHi; i++) {
const val = bins[i];
if (val > windowMax) windowMax = val;
if (val >= bins[i - 1] && val >= bins[i + 1]) {
localPeaks.push(i);
}
}
const candidates = localPeaks.filter((i) => bins[i] >= windowMax - 6);
const ranked = (candidates.length ? candidates : localPeaks).sort((a, b) => {
const dist = Math.abs(a - targetIdx) - Math.abs(b - targetIdx);
if (dist !== 0) return dist;
return bins[b] - bins[a];
});
let snappedIdx = ranked[0];
if (snappedIdx == null) {
snappedIdx = targetIdx;
for (let i = searchLo; i <= searchHi; i++) {
if (bins[i] > bins[snappedIdx]) snappedIdx = i;
}
}
return {
index: snappedIdx,
hz: Math.round(fullLoHz + (snappedIdx / maxIdx) * data.sample_rate),
db: bins[snappedIdx],
};
}
function nearestSpectrumPeakHz(cssX, cssW, data) {
return nearestSpectrumPeak(cssX, cssW, data)?.hz ?? null;
}
function visibleSpectrumPeakIndices(data, limit = 24) {
if (!data || !Array.isArray(data.bins) || data.bins.length < 3) {
return [];
}
const bins = data.bins;
const maxIdx = bins.length - 1;
const range = spectrumVisibleRange(data);
const fullLoHz = data.center_hz - data.sample_rate / 2;
const visStartIdx = Math.max(
1,
Math.min(maxIdx - 1, Math.floor(((range.visLoHz - fullLoHz) / data.sample_rate) * maxIdx)),
);
const visEndIdx = Math.max(
visStartIdx,
Math.min(maxIdx - 1, Math.ceil(((range.visHiHz - fullLoHz) / data.sample_rate) * maxIdx)),
);
const peaks = [];
for (let i = visStartIdx; i <= visEndIdx; i++) {
const v = bins[i];
if (v >= bins[i - 1] && v >= bins[i + 1]) {
peaks.push(i);
}
}
if (peaks.length === 0) {
return [];
}
const peakValues = peaks.map((i) => bins[i]).sort((a, b) => a - b);
const cutoff = peakValues[Math.max(0, Math.floor(peakValues.length * 0.7))];
return peaks
.filter((i) => bins[i] >= cutoff)
.sort((a, b) => bins[b] - bins[a])
.slice(0, limit)
.sort((a, b) => a - b);
}
// Format a frequency according to the current jog-step unit.
function formatSpectrumFreq(hz) {
if (jogUnit >= 1_000_000) return (hz / 1e6).toFixed(3) + " MHz";
if (jogUnit >= 1_000) return (hz / 1e3).toFixed(3) + " kHz";
return hz.toFixed(0) + " Hz";
}
// ββ Streaming ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
function scheduleSpectrumReconnect() {
if (spectrumReconnectTimer !== null) return;
spectrumReconnectTimer = setTimeout(() => {
spectrumReconnectTimer = null;
startSpectrumStreaming();
}, 1000);
}
function startSpectrumStreaming() {
if (spectrumSource !== null) return;
spectrumSource = new EventSource("/spectrum");
spectrumSource.onmessage = (evt) => {
if (evt.data === "null") {
lastSpectrumData = null;
overviewWaterfallRows = [];
overviewWaterfallPushCount = 0;
_wfResetOffscreen();
scheduleOverviewDraw();
clearSpectrumCanvas();
updateRdsPsOverlay(null);
return;
}
try {
lastSpectrumData = JSON.parse(evt.data);
rdsFrameCount++;
pushOverviewWaterfallFrame(lastSpectrumData);
refreshCenterFreqDisplay();
scheduleSpectrumDraw();
updateRdsPsOverlay(lastSpectrumData.rds);
} catch (_) {}
};
spectrumSource.onerror = () => {
if (spectrumSource) {
spectrumSource.close();
spectrumSource = null;
}
scheduleSpectrumReconnect();
};
}
function stopSpectrumStreaming() {
if (spectrumSource !== null) {
spectrumSource.close();
spectrumSource = null;
}
if (spectrumReconnectTimer !== null) {
clearTimeout(spectrumReconnectTimer);
spectrumReconnectTimer = null;
}
spectrumDrawPending = false;
lastSpectrumData = null;
rdsFrameCount = 0;
overviewWaterfallRows = [];
overviewWaterfallPushCount = 0;
_wfResetOffscreen();
scheduleOverviewDraw();
updateRdsPsOverlay(null);
clearSpectrumCanvas();
}
// ββ Rendering ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
function clearSpectrumCanvas() {
if (!spectrumCanvas) return;
const ctx = spectrumCanvas.getContext("2d");
ctx.fillStyle = spectrumBgColor();
ctx.fillRect(0, 0, spectrumCanvas.width, spectrumCanvas.height);
}
function formatOverlayPs(ps) {
return String(ps ?? "")
.slice(0, 8)
.padEnd(8, "_")
.replaceAll(" ", "_");
}
function formatOverlayPi(pi) {
return pi != null
? `PI 0x${pi.toString(16).toUpperCase().padStart(4, "0")}`
: "PI --";
}
function formatOverlayPty(pty, ptyName) {
if (ptyName) return ptyName;
return pty != null ? String(pty) : "--";
}
function overlayTrafficFlagHtml(label, active) {
const stateClass = active === true ? "rds-flag-active" : "rds-flag-inactive";
return `${label}`;
}
function formatRdsFlag(value, yes = "Yes", no = "No") {
if (value == null) return "--";
return value ? yes : no;
}
function formatRdsAudio(value) {
if (value == null) return "--";
return value ? "Music" : "Speech";
}
async function copyRdsPsToClipboard() {
const rds = lastSpectrumData?.rds;
const ps = rds?.program_service;
if (!rds || !ps || ps.length === 0) {
showHint("No RDS PS", 1200);
return;
}
const now = new Date();
const yyyy = now.getFullYear();
const mm = String(now.getMonth() + 1).padStart(2, "0");
const dd = String(now.getDate()).padStart(2, "0");
const hh = String(now.getHours()).padStart(2, "0");
const min = String(now.getMinutes()).padStart(2, "0");
const freqMhz = Number.isFinite(lastFreqHz) ? (Math.round((lastFreqHz / 100_000)) / 10).toFixed(1) : "--.-";
const piHex = rds.pi != null
? `0x${rds.pi.toString(16).toUpperCase().padStart(4, "0")}`
: "--";
const clipPs = formatOverlayPs(ps);
const clipText = `${yyyy}-${mm}-${dd} ${hh}:${min} - ${freqMhz} MHz - ${piHex} - ${clipPs}`;
try {
await navigator.clipboard.writeText(clipText);
showHint("RDS copied", 1200);
} catch (_) {
showHint("Clipboard failed", 1500);
}
}
async function copyRdsRawToClipboard() {
const rawEl = document.getElementById("rds-raw");
const rawText = rawEl?.textContent ?? "";
if (!rawText || rawText === "--") {
showHint("No RDS JSON", 1200);
return;
}
try {
await navigator.clipboard.writeText(rawText);
showHint("RDS JSON copied", 1200);
} catch (_) {
showHint("Clipboard failed", 1500);
}
}
if (rdsPsOverlay) {
rdsPsOverlay.addEventListener("click", () => { copyRdsPsToClipboard(); });
}
const rdsPsValueEl = document.getElementById("rds-ps");
if (rdsPsValueEl) {
rdsPsValueEl.addEventListener("click", () => { copyRdsPsToClipboard(); });
}
const rdsRawCopyBtn = document.getElementById("rds-raw-copy-btn");
if (rdsRawCopyBtn) {
rdsRawCopyBtn.addEventListener("click", () => { copyRdsRawToClipboard(); });
}
function updateRdsPsOverlay(rds) {
// Overview strip overlay
if (rdsPsOverlay) {
const ps = rds?.program_service;
const hasPs = !!(ps && ps.length > 0);
const hasPi = rds?.pi != null;
if (hasPs || hasPi) {
const mainText = hasPs
? formatOverlayPs(ps)
: formatOverlayPi(rds?.pi);
const mainClass = hasPs ? "rds-ps-main" : "rds-ps-fallback";
const metaText = hasPs
? `${formatOverlayPi(rds?.pi)} Β· ${formatOverlayPty(rds?.pty, rds?.pty_name)}`
: (rds?.pty_name ?? (rds?.pty != null ? String(rds.pty) : ""));
const trafficFlags =
`` +
`${overlayTrafficFlagHtml("TP", rds?.traffic_program)}` +
`${overlayTrafficFlagHtml("TA", rds?.traffic_announcement)}` +
``;
rdsPsOverlay.innerHTML =
`${escapeMapHtml(mainText)}` +
`` +
`${escapeMapHtml(metaText)}` +
`${trafficFlags}` +
``;
positionRdsPsOverlay();
rdsPsOverlay.style.display = "flex";
} else {
rdsPsOverlay.innerHTML = "";
rdsPsOverlay.style.display = "none";
}
}
// RDS debug panel
const statusEl = document.getElementById("rds-status");
const modeEl = document.getElementById("rds-mode");
const piEl = document.getElementById("rds-pi");
const psEl = document.getElementById("rds-ps");
const ptyEl = document.getElementById("rds-pty");
const ptyNameEl = document.getElementById("rds-pty-name");
const ptynEl = document.getElementById("rds-ptyn");
const tpEl = document.getElementById("rds-tp");
const taEl = document.getElementById("rds-ta");
const musicEl = document.getElementById("rds-music");
const stereoEl = document.getElementById("rds-stereo");
const compEl = document.getElementById("rds-compressed");
const headEl = document.getElementById("rds-artificial-head");
const dynPtyEl = document.getElementById("rds-dynamic-pty");
const rtEl = document.getElementById("rds-radio-text");
const rawEl = document.getElementById("rds-raw");
if (!statusEl) return;
// Always show the current mode, frame counter, and a sanitised spectrum snapshot
if (modeEl) modeEl.textContent = document.getElementById("mode")?.value || "--";
const framesEl = document.getElementById("rds-frames");
if (framesEl) framesEl.textContent = String(rdsFrameCount);
if (!rds) {
statusEl.textContent = "No signal";
statusEl.className = "rds-value rds-no-signal";
piEl.textContent = "--";
psEl.textContent = "--";
ptyEl.textContent = "--";
ptyNameEl.textContent = "--";
if (ptynEl) ptynEl.textContent = "--";
if (tpEl) tpEl.textContent = "--";
if (taEl) taEl.textContent = "--";
if (musicEl) musicEl.textContent = "--";
if (stereoEl) stereoEl.textContent = "--";
if (compEl) compEl.textContent = "--";
if (headEl) headEl.textContent = "--";
if (dynPtyEl) dynPtyEl.textContent = "--";
if (rtEl) rtEl.textContent = "--";
if (rawEl && lastSpectrumData) {
const { bins: _b, ...rest } = lastSpectrumData;
rawEl.textContent = JSON.stringify(rest, null, 2);
}
return;
}
statusEl.textContent = "Decoding";
statusEl.className = "rds-value rds-decoding";
piEl.textContent = rds.pi != null ? `0x${rds.pi.toString(16).toUpperCase().padStart(4, "0")}` : "--";
psEl.textContent = rds.program_service ?? "--";
ptyEl.textContent = rds.pty_name ?? (rds.pty != null ? String(rds.pty) : "--");
ptyNameEl.textContent = rds.pty != null ? String(rds.pty) : "--";
if (ptynEl) ptynEl.textContent = rds.program_type_name_long ?? "--";
if (tpEl) tpEl.textContent = formatRdsFlag(rds.traffic_program);
if (taEl) taEl.textContent = formatRdsFlag(rds.traffic_announcement);
if (musicEl) musicEl.textContent = formatRdsAudio(rds.music);
if (stereoEl) stereoEl.textContent = formatRdsFlag(rds.stereo);
if (compEl) compEl.textContent = formatRdsFlag(rds.compressed);
if (headEl) headEl.textContent = formatRdsFlag(rds.artificial_head);
if (dynPtyEl) dynPtyEl.textContent = formatRdsFlag(rds.dynamic_pty);
if (rtEl) rtEl.textContent = rds.radio_text ?? "--";
rawEl.textContent = JSON.stringify(rds, null, 2);
}
function scheduleSpectrumDraw() {
if (spectrumDrawPending) return;
spectrumDrawPending = true;
requestAnimationFrame(() => {
spectrumDrawPending = false;
if (lastSpectrumData) {
drawSpectrum(lastSpectrumData);
if (overviewWaterfallRows.length > 0) scheduleOverviewDraw();
}
});
}
function drawSpectrum(data) {
if (!spectrumCanvas) return;
// HiDPI sizing
const dpr = window.devicePixelRatio || 1;
const cssW = spectrumCanvas.clientWidth || 640;
const cssH = spectrumCanvas.clientHeight || 160;
const W = Math.round(cssW * dpr);
const H = Math.round(cssH * dpr);
if (spectrumCanvas.width !== W || spectrumCanvas.height !== H) {
spectrumCanvas.width = W;
spectrumCanvas.height = H;
}
const ctx = spectrumCanvas.getContext("2d");
const pal = canvasPalette();
const range = spectrumVisibleRange(data);
const bins = data.bins;
const n = bins.length;
// Background
ctx.fillStyle = pal.bg;
ctx.fillRect(0, 0, W, H);
if (!n) return;
const DB_MIN = spectrumFloor;
const DB_MAX = spectrumFloor + spectrumRange;
const dbRange = DB_MAX - DB_MIN;
const fullSpanHz = data.sample_rate;
const loHz = data.center_hz - fullSpanHz / 2;
// Horizontal dB grid lines
ctx.strokeStyle = pal.spectrumGrid;
ctx.lineWidth = 1;
const gridStep = spectrumRange > 100 ? 20 : 10;
for (let db = Math.ceil(DB_MIN / gridStep) * gridStep; db <= DB_MAX; db += gridStep) {
const y = Math.round(H * (1 - (db - DB_MIN) / dbRange));
ctx.beginPath(); ctx.moveTo(0, y); ctx.lineTo(W, y); ctx.stroke();
}
// Y-axis dB labels (left side)
ctx.save();
ctx.font = `${Math.round(9 * dpr)}px monospace`;
ctx.fillStyle = pal.spectrumLabel;
ctx.textAlign = "left";
for (let db = Math.ceil(DB_MIN / gridStep) * gridStep; db <= DB_MAX; db += gridStep) {
const y = Math.round(H * (1 - (db - DB_MIN) / dbRange));
if (y > 8 * dpr && y < H - 2 * dpr) {
ctx.fillText(`${db}`, 4 * dpr, y - 2 * dpr);
}
}
ctx.restore();
// Coordinate helpers
function hzToX(hz) {
return ((hz - range.visLoHz) / range.visSpanHz) * W;
}
function binX(i) {
return hzToX(loHz + (i / (n - 1)) * fullSpanHz);
}
function binY(i) {
const db = Math.max(DB_MIN, Math.min(DB_MAX, bins[i]));
return H * (1 - (db - DB_MIN) / dbRange);
}
// ββ BW strip (drawn before spectrum so traces appear on top) ββββββββββββββ
if (lastFreqHz != null && currentBandwidthHz > 0) {
const halfBw = currentBandwidthHz / 2;
const xL = hzToX(lastFreqHz - halfBw);
const xR = hzToX(lastFreqHz + halfBw);
const stripW = xR - xL;
if (stripW > 1) {
// Warm amber gradient fill
const grd = ctx.createLinearGradient(xL, 0, xR, 0);
grd.addColorStop(0, "rgba(240,173,78,0.05)");
grd.addColorStop(0.2, "rgba(240,173,78,0.14)");
grd.addColorStop(0.5, "rgba(240,173,78,0.19)");
grd.addColorStop(0.8, "rgba(240,173,78,0.14)");
grd.addColorStop(1, "rgba(240,173,78,0.05)");
ctx.fillStyle = grd;
ctx.fillRect(xL, 0, stripW, H);
// Edge handle bars
const EDGE = 5 * dpr;
ctx.fillStyle = "rgba(240,173,78,0.30)";
ctx.fillRect(xL, 0, EDGE, H);
ctx.fillRect(xR - EDGE, 0, EDGE, H);
// Edge border lines
ctx.strokeStyle = "rgba(240,173,78,0.70)";
ctx.lineWidth = 1.5 * dpr;
ctx.beginPath(); ctx.moveTo(xL, 0); ctx.lineTo(xL, H); ctx.stroke();
ctx.beginPath(); ctx.moveTo(xR, 0); ctx.lineTo(xR, H); ctx.stroke();
// Bottom bookmark tab centered on the dial frequency
const xMid = hzToX(lastFreqHz);
const bwText = formatBwLabel(currentBandwidthHz);
ctx.save();
ctx.font = `bold ${Math.round(10 * dpr)}px sans-serif`;
const tw = ctx.measureText(bwText).width;
const PAD = 6 * dpr;
const TAB_H = 16 * dpr;
const tabX = Math.max(0, Math.min(W - tw - PAD * 2, xMid - (tw + PAD * 2) / 2));
const tabY = H - TAB_H;
const r = 3 * dpr;
// Rounded-bottom tab shape (flat top)
ctx.fillStyle = "rgba(240,173,78,0.85)";
ctx.beginPath();
ctx.moveTo(tabX, tabY);
ctx.lineTo(tabX + tw + PAD * 2, tabY);
ctx.lineTo(tabX + tw + PAD * 2, H - r);
ctx.arcTo(tabX + tw + PAD * 2, H, tabX + tw + PAD * 2 - r, H, r);
ctx.lineTo(tabX + r, H);
ctx.arcTo(tabX, H, tabX, H - r, r);
ctx.lineTo(tabX, tabY);
ctx.closePath();
ctx.fill();
// Tab text
ctx.fillStyle = spectrumBgColor();
ctx.textAlign = "left";
ctx.fillText(bwText, tabX + PAD, H - 4 * dpr);
ctx.restore();
}
}
// ββ Spectrum fill βββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ctx.save();
ctx.beginPath();
ctx.moveTo(binX(0), H);
for (let i = 0; i < n; i++) ctx.lineTo(binX(i), binY(i));
ctx.lineTo(binX(n - 1), H);
ctx.closePath();
ctx.fillStyle = pal.spectrumFill;
ctx.fill();
ctx.restore();
// ββ Spectrum line βββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ctx.save();
ctx.beginPath();
ctx.strokeStyle = pal.spectrumLine;
ctx.lineWidth = Math.max(1, dpr);
for (let i = 0; i < n; i++) {
const x = binX(i), y = binY(i);
i === 0 ? ctx.moveTo(x, y) : ctx.lineTo(x, y);
}
ctx.stroke();
ctx.restore();
// ββ Peak markers for easier snap-tune targeting ββββββββββββββββββββββββββ
const markerPeaks = visibleSpectrumPeakIndices(data);
if (markerPeaks.length > 0) {
ctx.save();
ctx.fillStyle = pal.waveformPeak;
ctx.strokeStyle = pal.bg;
ctx.lineWidth = Math.max(1, dpr * 0.75);
const radius = Math.max(2, dpr * 1.6);
for (const idx of markerPeaks) {
const x = binX(idx);
const y = binY(idx);
ctx.beginPath();
ctx.arc(x, y - radius * 0.35, radius, 0, Math.PI * 2);
ctx.fill();
ctx.stroke();
}
ctx.restore();
}
// ββ Tuned-frequency marker ββββββββββββββββββββββββββββββββββββββββββββββββ
if (lastFreqHz != null) {
const xf = hzToX(lastFreqHz);
if (xf >= 0 && xf <= W) {
ctx.save();
ctx.setLineDash([4 * dpr, 4 * dpr]);
ctx.strokeStyle = "#ff1744";
ctx.lineWidth = Math.max(1, dpr);
ctx.beginPath(); ctx.moveTo(xf, 0); ctx.lineTo(xf, H); ctx.stroke();
ctx.restore();
}
}
updateSpectrumFreqAxis(range);
}
function updateSpectrumFreqAxis(range) {
if (!spectrumFreqAxis) return;
const spanHz = range.visSpanHz;
// Pick a step that gives ~5 labels
const targets = [100, 200, 500, 1e3, 2e3, 5e3, 10e3, 20e3, 50e3,
100e3, 200e3, 500e3, 1e6, 2e6, 5e6, 10e6];
const ideal = spanHz / 5;
const stepHz = targets.reduce((best, s) =>
Math.abs(s - ideal) < Math.abs(best - ideal) ? s : best, targets[0]);
const axisKey = [
Math.round(range.visLoHz),
Math.round(range.visHiHz),
Math.round(stepHz),
spectrumFreqAxis.clientWidth || 0,
].join(":");
if (axisKey === spectrumAxisKey) return;
spectrumAxisKey = axisKey;
const firstHz = Math.ceil(range.visLoHz / stepHz) * stepHz;
spectrumFreqAxis.innerHTML = "";
for (let hz = firstHz; hz <= range.visHiHz + stepHz * 0.01; hz += stepHz) {
const frac = (hz - range.visLoHz) / range.visSpanHz;
if (frac < 0 || frac > 1) continue;
const label = hz >= 1e6
? (hz / 1e6).toFixed(stepHz < 1e6 ? (stepHz < 100e3 ? 3 : 1) : 0) + " M"
: hz >= 1e3
? (hz / 1e3).toFixed(stepHz < 1e3 ? 1 : 0) + " k"
: hz.toFixed(0);
const span = document.createElement("span");
span.textContent = label;
span.style.left = (frac * 100).toFixed(2) + "%";
spectrumFreqAxis.appendChild(span);
}
}
// ββ Zoom helpers ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
function spectrumZoomAt(cssX, cssW, data, factor) {
const range = spectrumVisibleRange(data);
const hzAtCursor = canvasXToHz(cssX, cssW, range);
const frac = cssX / cssW;
spectrumZoom = Math.max(1, Math.min(64, spectrumZoom * factor));
// Recompute so the pixel under the cursor keeps the same frequency
const newVisSpan = data.sample_rate / spectrumZoom;
const newVisCenter = hzAtCursor + (0.5 - frac) * newVisSpan;
const loHz = data.center_hz - data.sample_rate / 2;
spectrumPanFrac = (newVisCenter - loHz) / data.sample_rate;
}
// ββ Scroll to zoom ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
if (spectrumCanvas) {
spectrumCanvas.addEventListener("wheel", (e) => {
e.preventDefault();
if (!lastSpectrumData) return;
if (e.ctrlKey) {
const direction = e.deltaY < 0 ? 1 : -1;
jogFreq(direction);
return;
}
const rect = spectrumCanvas.getBoundingClientRect();
const cssX = e.clientX - rect.left;
const factor = e.deltaY < 0 ? 1.25 : 1 / 1.25;
spectrumZoomAt(cssX, rect.width, lastSpectrumData, factor);
scheduleSpectrumDraw();
}, { passive: false });
}
// ββ BW strip edge hit-test (CSS pixels) ββββββββββββββββββββββββββββββββββββββ
function getBwEdgeHit(cssX, cssW, range) {
if (!lastFreqHz || !currentBandwidthHz || !lastSpectrumData) return null;
const halfBw = currentBandwidthHz / 2;
const xL = ((lastFreqHz - halfBw - range.visLoHz) / range.visSpanHz) * cssW;
const xR = ((lastFreqHz + halfBw - range.visLoHz) / range.visSpanHz) * cssW;
const HIT = 8;
if (Math.abs(cssX - xL) < HIT) return "left";
if (Math.abs(cssX - xR) < HIT) return "right";
return null;
}
// ββ Mouse drag to pan / BW resize βββββββββββββββββββββββββββββββββββββββββββββ
let _sDragStart = null; // { clientX, panFrac }
let _sDragMoved = false;
if (spectrumCanvas) {
spectrumCanvas.addEventListener("mousedown", (e) => {
if (e.button !== 0) return;
if (lastSpectrumData) {
const rect = spectrumCanvas.getBoundingClientRect();
const cssX = e.clientX - rect.left;
const range = spectrumVisibleRange(lastSpectrumData);
const edge = getBwEdgeHit(cssX, rect.width, range);
if (edge) {
_bwDragEdge = edge;
_bwDragStartX = cssX;
_bwDragStartBwHz = currentBandwidthHz;
_sDragStart = null;
_sDragMoved = true; // suppress click-to-tune
return;
}
}
_sDragStart = { clientX: e.clientX, panFrac: spectrumPanFrac };
_sDragMoved = false;
});
window.addEventListener("mousemove", (e) => {
if (_bwDragEdge && lastSpectrumData) {
const rect = spectrumCanvas.getBoundingClientRect();
const cssX = e.clientX - rect.left;
const range = spectrumVisibleRange(lastSpectrumData);
const dxHz = ((cssX - _bwDragStartX) / rect.width) * range.visSpanHz;
let newBw = _bwDragEdge === "right"
? _bwDragStartBwHz + dxHz * 2
: _bwDragStartBwHz - dxHz * 2;
const [, minBw, maxBw] = mwDefaultsForMode(modeEl ? modeEl.value : "USB");
newBw = Math.round(Math.max(minBw, Math.min(maxBw, newBw)));
currentBandwidthHz = newBw;
syncBandwidthInput(newBw);
scheduleSpectrumDraw();
return;
}
if (!_sDragStart || !lastSpectrumData) return;
const rect = spectrumCanvas.getBoundingClientRect();
const dx = e.clientX - _sDragStart.clientX;
if (Math.abs(dx) > 3) _sDragMoved = true;
spectrumPanFrac = _sDragStart.panFrac - (dx / rect.width) / spectrumZoom;
scheduleSpectrumDraw();
});
window.addEventListener("mouseup", async () => {
if (_bwDragEdge) {
try { await postPath(`/set_bandwidth?hz=${Math.round(currentBandwidthHz)}`); } catch (_) {}
_bwDragEdge = null;
return;
}
_sDragStart = null;
});
}
// ββ Touch: pinch-to-zoom + single-finger pan ββββββββββββββββββββββββββββββββββ
let _sTouch = null;
if (spectrumCanvas) {
spectrumCanvas.addEventListener("touchstart", (e) => {
e.preventDefault();
if (e.touches.length === 2) {
const t0 = e.touches[0], t1 = e.touches[1];
_sTouch = {
type: "pinch",
dist: Math.hypot(t1.clientX - t0.clientX, t1.clientY - t0.clientY),
midX: (t0.clientX + t1.clientX) / 2,
zoom: spectrumZoom,
panFrac: spectrumPanFrac,
};
} else if (e.touches.length === 1) {
_sTouch = { type: "pan", clientX: e.touches[0].clientX, panFrac: spectrumPanFrac };
}
}, { passive: false });
spectrumCanvas.addEventListener("touchmove", (e) => {
e.preventDefault();
if (!_sTouch || !lastSpectrumData) return;
const rect = spectrumCanvas.getBoundingClientRect();
if (_sTouch.type === "pinch" && e.touches.length === 2) {
const t0 = e.touches[0], t1 = e.touches[1];
const newDist = Math.hypot(t1.clientX - t0.clientX, t1.clientY - t0.clientY);
const newMidX = (t0.clientX + t1.clientX) / 2;
const scale = newDist / _sTouch.dist;
const newZoom = Math.max(1, Math.min(64, _sTouch.zoom * scale));
const loHz = lastSpectrumData.center_hz - lastSpectrumData.sample_rate / 2;
// Compute Hz under original midpoint in original view
const oldVisSpan = lastSpectrumData.sample_rate / _sTouch.zoom;
const oldVisLo = loHz + _sTouch.panFrac * lastSpectrumData.sample_rate - oldVisSpan / 2;
const midFrac = (_sTouch.midX - rect.left) / rect.width;
const midHz = oldVisLo + midFrac * oldVisSpan;
const newVisSpan = lastSpectrumData.sample_rate / newZoom;
const newVisCenter = midHz + (0.5 - midFrac) * newVisSpan;
spectrumZoom = newZoom;
spectrumPanFrac = (newVisCenter - loHz) / lastSpectrumData.sample_rate;
// Pan contribution from mid shift
const dxMid = newMidX - _sTouch.midX;
spectrumPanFrac -= (dxMid / rect.width) / spectrumZoom;
scheduleSpectrumDraw();
} else if (_sTouch.type === "pan" && e.touches.length === 1) {
const dx = e.touches[0].clientX - _sTouch.clientX;
spectrumPanFrac = _sTouch.panFrac - (dx / rect.width) / spectrumZoom;
scheduleSpectrumDraw();
}
}, { passive: false });
spectrumCanvas.addEventListener("touchend", () => { _sTouch = null; });
}
// ββ Hover tooltip + cursor ββββββββββββββββββββββββββββββββββββββββββββββββββββ
if (spectrumCanvas) {
spectrumCanvas.addEventListener("mousemove", (e) => {
if (!lastSpectrumData || !spectrumTooltip) return;
const rect = spectrumCanvas.getBoundingClientRect();
const cssX = e.clientX - rect.left;
const range = spectrumVisibleRange(lastSpectrumData);
// Change cursor when hovering near BW strip edges
const edge = getBwEdgeHit(cssX, rect.width, range);
spectrumCanvas.style.cursor = edge ? "ew-resize" : "crosshair";
const hz = canvasXToHz(cssX, rect.width, range);
const peak = edge ? null : nearestSpectrumPeak(cssX, rect.width, lastSpectrumData);
const peakHz = peak?.hz ?? null;
const peakDb = peak && Number.isFinite(peak.db) ? `${peak.db.toFixed(1)} dB` : null;
if (peakHz != null && Math.abs(peakHz - hz) >= Math.max(minFreqStepHz, 10)) {
spectrumTooltip.textContent = peakDb
? `Peak ${formatSpectrumFreq(peakHz)} Β· ${peakDb}`
: `Peak ${formatSpectrumFreq(peakHz)}`;
} else {
const baseText = formatSpectrumFreq(peakHz ?? hz);
spectrumTooltip.textContent = peakDb ? `${baseText} Β· ${peakDb}` : baseText;
}
spectrumTooltip.style.display = "block";
const tw = spectrumTooltip.offsetWidth;
let tx = cssX + 10;
if (tx + tw > rect.width) tx = cssX - tw - 10;
spectrumTooltip.style.left = tx + "px";
spectrumTooltip.style.top = Math.max(0, e.clientY - rect.top - 28) + "px";
});
spectrumCanvas.addEventListener("mouseleave", () => {
if (spectrumTooltip) spectrumTooltip.style.display = "none";
spectrumCanvas.style.cursor = "crosshair";
});
}
// ββ Click to tune (only when not dragging) ββββββββββββββββββββββββββββββββββββ
if (spectrumCanvas) {
spectrumCanvas.addEventListener("click", (e) => {
if (_sDragMoved) { _sDragMoved = false; return; }
if (!lastSpectrumData) return;
const rect = spectrumCanvas.getBoundingClientRect();
const cssX = e.clientX - rect.left;
const range = spectrumVisibleRange(lastSpectrumData);
const targetHz = nearestSpectrumPeakHz(cssX, rect.width, lastSpectrumData)
?? Math.round(canvasXToHz(cssX, rect.width, range));
postPath(`/set_freq?hz=${targetHz}`)
.then(() => { applyLocalTunedFrequency(targetHz); })
.catch(() => {});
});
}
// ββ Spectrum floor input + Auto level ββββββββββββββββββββββββββββββββββββββββ
(function () {
const floorInput = document.getElementById("spectrum-floor-input");
const autoBtn = document.getElementById("spectrum-auto-btn");
if (floorInput) {
floorInput.addEventListener("change", () => {
const v = Number(floorInput.value);
if (!isNaN(v)) {
spectrumFloor = v;
if (lastSpectrumData) scheduleSpectrumDraw();
}
});
}
if (autoBtn) {
autoBtn.addEventListener("click", () => {
if (!lastSpectrumData) return;
const sorted = [...lastSpectrumData.bins].sort((a, b) => a - b);
// Use 15th-percentile as noise floor, peak for top
const noise = sorted[Math.floor(sorted.length * 0.15)];
const peak = sorted[sorted.length - 1];
spectrumFloor = Math.floor(noise / 10) * 10 - 10;
spectrumRange = Math.max(60, Math.ceil((peak - spectrumFloor) / 10) * 10 + 10);
if (floorInput) floorInput.value = spectrumFloor;
scheduleSpectrumDraw();
});
}
})();