[fix](trx-frontend): narrow weak WFM to 60 kHz

LICENSES/MIT.txt

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) <year> <copyright holders>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -142,6 +142,6 @@ a unified set of frontends.
 ## License
 
 GPL-2.0-or-later. See [`LICENSES`](LICENSES) for the full license text and
-bundled third-party license files. Bundled third-party components (Leaflet and
+bundled third-party license files. Bundled third-party components retain their
-the Leaflet AIS tracksymbol plugin under `assets/web/vendor/`) retain their
+original licenses: Leaflet is BSD-2-Clause, DSEG is OFL-1.1, and opus-decoder
-original BSD-2-Clause license.
+is MIT.

REUSE.toml

@@ -42,3 +42,11 @@ SPDX-License-Identifier = "BSD-2-Clause"
 path = ["src/trx-client/trx-frontend/trx-frontend-http/assets/web/vendor/dseg14-classic-latin-400-normal.woff2"]
 SPDX-FileCopyrightText = "2020 The DSEG Authors (https://github.com/keshikan/DSEG)"
 SPDX-License-Identifier = "OFL-1.1"
+
+# Vendored opus-decoder 0.7.11 browser build
+# (https://github.com/eshaz/wasm-audio-decoders), MIT.
+# SHA-256: fd73ee0a9c8a5e233c0b88234df14f46003ad89bb4ba27435bc8714db2a6dc62
+[[annotations]]
+path = ["src/trx-client/trx-frontend/trx-frontend-http/assets/web/vendor/opus-decoder-0.7.11.min.js"]
+SPDX-FileCopyrightText = "2021-2025 Ethan Halsall"
+SPDX-License-Identifier = "MIT"

src/decoders/trx-wefax/src/image.rs

@@ -274,7 +274,8 @@ mod tests {
 
         // Pseudo-random noise vs gradient — correlation should be low.
         let noise: Vec<u8> = (0..256)
-            .map(|i| ((i * 1103515245 + 12345) as u32 >> 8 & 0xff) as u8)
+            .map(|i| (i as u32).wrapping_mul(1_103_515_245).wrapping_add(12_345))
+            .map(|value| ((value >> 8) & 0xff) as u8)
             .collect();
         let r = asm.correlation_with_last(&noise).expect("r");
         assert!(

src/trx-client/trx-frontend/trx-frontend-http/assets/web/app.js

@@ -645,7 +645,7 @@ function flushDeferredDecodeMapSync() {
   if (!decodeMapSyncPending || decodeHistoryReplayActive || !window.trx?.map?.aprsMap) return;
   decodeMapSyncPending = false;
   scheduleUiFrameJob("decode-map-maintenance", () => {
-    window.trx.map?.pruneMapHistory();
+    window.trx.modules.map?.pruneMapHistory();
   });
 }
 
@@ -1279,7 +1279,7 @@ function applyRigList(activeRigId, rigIds, displayNames) {
     if (typeof bmPopulateScopePicker === "function") bmPopulateScopePicker();
     if (typeof bmFetch === "function") bmFetch(document.getElementById("bm-category-filter")?.value || "");
   }
-  window.trx.map?.updateMapRigFilter();
+  window.trx.modules.map?.updateMapRigFilter();
 }
 
 
@@ -1305,7 +1305,7 @@ async function refreshRigList() {
     serverRigs = rigs;
     serverActiveRigId = data.active_remote || null;
     applyRigList(data.active_remote, rigIds, displayNames);
-    window.trx.map?.syncAprsReceiverMarker();
+    window.trx.modules.map?.syncAprsReceiverMarker();
   } catch (e) {
     // Non-fatal: SSE/status path still drives main UI.
   }
@@ -3143,9 +3143,9 @@ function render(update) {
     const grid = latLonToMaidenhead(serverLat, serverLon);
     locationSubtitle.textContent = `Location: ${grid}`;
     locationSubtitle.style.display = "";
-    window.trx.map?.reverseGeocodeLocation(serverLat, serverLon, grid);
+    window.trx.modules.map?.reverseGeocodeLocation(serverLat, serverLon, grid);
   }
-  window.trx.map?.syncAprsReceiverMarker();
+  window.trx.modules.map?.syncAprsReceiverMarker();
   if (typeof update.initial_map_zoom === "number" && Number.isFinite(update.initial_map_zoom)) {
     initialMapZoom = Math.max(1, Math.round(update.initial_map_zoom));
   }
@@ -3894,7 +3894,7 @@ async function switchRigFromSelect(selectEl) {
   if (typeof setSchedulerRig === "function") setSchedulerRig(lastActiveRigId);
   if (typeof setBackgroundDecodeRig === "function") setBackgroundDecodeRig(lastActiveRigId);
   if (typeof bmFetch === "function") bmFetch(document.getElementById("bm-category-filter")?.value || "");
-  window.trx.map?.syncAprsReceiverMarker();
+  window.trx.modules.map?.syncAprsReceiverMarker();
   // Switch this session's rig and reconnect SSE to the new rig's
   // state channel.
   try {
@@ -4268,7 +4268,7 @@ const MODE_BW_DEFAULTS = {
   FM:     [12_500, 2_500, 25_000, 500],
   AIS:    [25_000, 12_500, 50_000, 500],
   VDES:   [100_000, 25_000, 200_000, 1_000],
-  WFM:    [180_000, 50_000,300_000,5_000],
+  WFM:    [180_000, 60_000,300_000,5_000],
   DIG:    [3_000,  300,   6_000,  100],
   PKT:    [25_000, 300,  50_000,  500],
 };
@@ -4348,64 +4348,93 @@ async function applyBandwidthFromInput() {
   } catch (_) {}
 }
 
-function estimateBandwidthAroundPeak(data, centerHz) {
+function estimateOccupiedBandwidth(data, centerHz) {
   if (!data || !isBinsArray(data.bins) || data.bins.length < 3 || !Number.isFinite(centerHz)) {
     return null;
   }
 
   const bins = data.bins;
   const maxIdx = bins.length - 1;
+  const hzPerBin = data.sample_rate / maxIdx;
   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 mode = (modeEl ? modeEl.value : "USB").toUpperCase();
-  const searchLo = Math.max(1, centerIdx - searchRadius);
+  const [defaultBw, minBw, maxBw, stepBw] = mwDefaultsForMode(mode);
-  const searchHi = Math.min(maxIdx - 1, centerIdx + searchRadius);
+  const oneSided = mode === "USB" || mode === "DIG" || mode === "CW"
-
+    ? 1
-  let peakIdx = centerIdx;
+    : mode === "LSB" || mode === "CWR" ? -1 : 0;
-  for (let i = searchLo; i <= searchHi; i++) {
+  const isWfm = mode === "WFM";
-    if (bins[i] > bins[peakIdx]) peakIdx = i;
-  }
 
+  // Reduce single-bin peaks and holes before finding occupied-channel edges.
+  // WFM needs a wider smoothing window because its energy is noise-like and
+  // spread across the entire channel rather than concentrated at a carrier.
+  const smoothRadius = isWfm ? 3 : 1;
+  const smoothed = bins.map((_, i) => {
+    let sum = 0;
+    let count = 0;
+    for (let j = Math.max(0, i - smoothRadius); j <= Math.min(maxIdx, i + smoothRadius); j++) {
+      sum += bins[j];
+      count += 1;
+    }
+    return sum / count;
+  });
   const sorted = [...bins].sort((a, b) => a - b);
   const noise = sorted[Math.floor(sorted.length * 0.2)];
-  const peak = bins[peakIdx];
+  const maxSpanBins = Math.max(2, Math.ceil(maxBw / hzPerBin));
-  const threshold = Math.max(noise + 4, peak - Math.max(8, (peak - noise) * 0.35));
+  const searchHalfBins = oneSided === 0 ? Math.ceil(maxSpanBins / 2) : maxSpanBins;
+  const searchLo = Math.max(1, centerIdx - (oneSided > 0 ? 2 : searchHalfBins));
+  const searchHi = Math.min(maxIdx - 1, centerIdx + (oneSided < 0 ? 2 : searchHalfBins));
+  let peak = -Infinity;
+  for (let i = searchLo; i <= searchHi; i++) peak = Math.max(peak, smoothed[i]);
+  const snr = peak - noise;
+  if (!Number.isFinite(snr) || snr < (isWfm ? 5 : 4)) return isWfm ? minBw : defaultBw;
 
-  let left = peakIdx;
+  // A threshold relative to the noise floor finds occupied bandwidth much
-  let right = peakIdx;
+  // more reliably than one relative to the peak.  The latter fails for WFM,
-  let belowCount = 0;
+  // whose multiplex spectrum has peaks, notches, and no narrow centre carrier.
-  for (let i = peakIdx; i > 1; i--) {
+  const threshold = noise + Math.max(3, Math.min(isWfm ? 6 : 10, snr * (isWfm ? 0.18 : 0.28)));
-    if (bins[i] < threshold) belowCount += 1;
+  const allowedGap = Math.max(isWfm ? 4 : 2, Math.ceil((isWfm ? 12_000 : stepBw) / hzPerBin));
-    else belowCount = 0;
+
-    if (belowCount >= 2) break;
+  function occupiedExtent(direction, limitBins) {
-    left = i;
+    let lastOccupied = centerIdx;
+    let gap = 0;
+    for (let n = 0; n <= limitBins; n++) {
+      const i = centerIdx + direction * n;
+      if (i <= 0 || i >= maxIdx) break;
+      if (smoothed[i] >= threshold) {
+        lastOccupied = i;
+        gap = 0;
+      } else if (++gap > allowedGap) {
+        break;
+      }
+    }
+    return Math.abs(lastOccupied - centerIdx) * hzPerBin;
   }
 
-  belowCount = 0;
+  let rawBw;
-  for (let i = peakIdx; i < maxIdx - 1; i++) {
+  if (oneSided !== 0) {
-    if (bins[i] < threshold) belowCount += 1;
+    rawBw = occupiedExtent(oneSided, maxSpanBins);
-    else belowCount = 0;
+  } else {
-    if (belowCount >= 2) break;
+    const leftHz = occupiedExtent(-1, searchHalfBins);
-    right = i;
+    const rightHz = occupiedExtent(1, searchHalfBins);
+    // A symmetric RF filter must contain the larger of the two sidebands.
+    rawBw = 2 * Math.max(leftHz, rightHz);
   }
 
-  const shoulderPad = Math.max(1, Math.round((right - left) * 0.08));
+  // Add a transition-band margin.  Weak WFM deliberately falls back to the
-  left = Math.max(0, left - shoulderPad);
+  // 60 kHz mode floor above: a narrower filter trades stereo/RDS content for
-  right = Math.min(maxIdx, right + shoulderPad);
+  // a useful improvement in intelligibility when the signal is very poor.
-
+  rawBw *= isWfm ? 1.08 : 1.12;
-  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);
+  const estimated = estimateOccupiedBandwidth(lastSpectrumData, lastFreqHz);
   if (!Number.isFinite(estimated) || estimated <= 0) {
     syncBandwidthInput(currentBandwidthHz);
     return;
@@ -4480,23 +4509,23 @@ function updateTabHistory(name, replaceHistory = false) {
 }
 
 // Initialise the Leaflet map, waiting for both Leaflet (L) and map-core.js
-// (window.trx.map) if they haven't loaded yet.
+// (window.trx.modules.map) if they haven't loaded yet.
 let _mapInitTimer = null;
 function _initMapWhenReady() {
   const loadingEl = document.getElementById("map-loading");
-  if (window.trx.map && typeof L !== "undefined") {
+  if (window.trx.modules.map && typeof L !== "undefined") {
     if (_mapInitTimer) { clearInterval(_mapInitTimer); _mapInitTimer = null; }
     if (loadingEl) loadingEl.classList.add("is-hidden");
-    window.trx.map.initAprsMap();
+    window.trx.modules.map.initAprsMap();
-    window.trx.map.sizeAprsMapToViewport();
+    window.trx.modules.map.sizeAprsMapToViewport();
     // The map panel was just made visible (display:none → ""); the browser
     // may not have laid it out yet, so getBoundingClientRect() can return
     // stale/zero dimensions.  Double-rAF ensures a full layout pass has
     // completed before we re-measure and tell Leaflet about its real size.
     requestAnimationFrame(() => {
       requestAnimationFrame(() => {
-        window.trx.map.sizeAprsMapToViewport();
+        window.trx.modules.map.sizeAprsMapToViewport();
-        if (window.trx.map.aprsMap) window.trx.map.aprsMap.invalidateSize();
+        if (window.trx.modules.map.aprsMap) window.trx.modules.map.aprsMap.invalidateSize();
       });
     });
     return;
@@ -4544,7 +4573,7 @@ function navigateToTab(name, options = {}) {
     _initMapWhenReady();
   }
   if (name === "statistics") {
-    window.trx.map?.scheduleStatsRender();
+    window.trx.modules.map?.scheduleStatsRender();
   }
   if (name === "recorder") {
     refreshRecorderStatus();
@@ -4721,10 +4750,11 @@ if (headerAuthBtn) {
 // ── Shared namespace for lazy-loaded modules ────────────────────────────────
 // Modules (map-core.js, screenshot.js) access core state and utilities via
 // window.trx.  Modules register their own APIs as sub-namespaces
-// (e.g. window.trx.map, window.trx.screenshot).
+// (e.g. window.trx.modules.map, window.trx.modules.screenshot).
-window.trx = Object.create(null);
+const trxState = Object.create(null);
+const trxModules = Object.create(null);
 // -- State getters (backed by core-scoped variables) --
-Object.defineProperties(window.trx, {
+Object.defineProperties(trxState, {
   serverLat:              { get() { return serverLat;              }, set(v) { serverLat = v; } },
   serverLon:              { get() { return serverLon;              }, set(v) { serverLon = v; } },
   lastFreqHz:             { get() { return lastFreqHz;             } },
@@ -4762,7 +4792,7 @@ Object.defineProperties(window.trx, {
   signalOverlayGl:        { get() { return signalOverlayGl;      } },
 });
 // -- Shared utility functions --
-Object.assign(window.trx, {
+const trxCore = Object.freeze({
   saveSetting, loadSetting, showHint, escapeMapHtml, formatFreq, formatFreqForHumans,
   formatWavelength, formatBwLabel, formatUptime, formatSigStrength, formatSignal,
   postPath, scheduleUiFrameJob, navigateToTab, rigBadgeColor,
@@ -4772,18 +4802,19 @@ Object.assign(window.trx, {
   currentTheme, canvasPalette, currentStyle,
   cssColorToRgba, rgbaWithAlpha, isBinsArray, estimateNoiseFloorDb,
   spectrumVisibleRange, drawSpectrum,
-  bandForHz: function(hz) { return window.trx.map?.bandForHz?.(hz); },
+  bandForHz: function(hz) { return trxModules.map?.bandForHz?.(hz); },
   markDecodeMapSyncPending,
   decodeHistoryMapRenderingDeferred,
   updateDocumentTitle,
   activeChannelRds,
 });
-Object.defineProperties(window.trx, {
+Object.defineProperties(trxState, {
   decodeHistoryReplayActive: { get() { return decodeHistoryReplayActive; } },
   decodeMapSyncPending:      { get() { return decodeMapSyncPending; } },
   _activeTab:                { get() { return _activeTab; } },
   locationSubtitle:          { get() { return locationSubtitle; } },
 });
+window.trx = Object.freeze({ state: trxState, core: trxCore, modules: trxModules });
 
 // Load plugin scripts now that window.trx is populated.  Dynamic scripts are
 // async so they must not be created before the namespace they depend on exists.
@@ -4797,7 +4828,7 @@ window.addEventListener("resize", resizeHeaderSignalCanvas);
 // ── Map module (extracted to map-core.js, lazy-loaded) ──────────────────────
 // The map, statistics, and geolocation code (~3,450 lines) has been moved to
 // map-core.js and is loaded on demand when the Map tab is first activated.
-// Core communicates with the map module via window.trx.map.* namespace.
+// Core communicates with the map module via window.trx.modules.map.* namespace.
 
 // ── Geo utilities (shared with map-core.js via window.trx) ─────────────────
 function haversineKm(lat1, lon1, lat2, lon2) {
@@ -4932,7 +4963,7 @@ document.querySelectorAll(".sub-tab-bar").forEach(_wireSubTabBar);
 window.addEventListener("resize", () => {
   const mapTab = document.getElementById("tab-map");
   if (!mapTab || mapTab.style.display === "none") return;
-  window.trx.map?.sizeAprsMapToViewport();
+  window.trx.modules.map?.sizeAprsMapToViewport();
 });
 
 // --- Signal measurement ---
@@ -6102,8 +6133,8 @@ function dispatchDecodeMessage(msg, skipStats) {
   if (msg.type === "wefax" && window.onServerWefax) window.onServerWefax(msg);
   if (msg.type === "wefax_progress" && window.onServerWefaxProgress) window.onServerWefaxProgress(msg);
   if (!skipStats && msg.type && msg.type !== "lrpt_image" && msg.type !== "lrpt_progress" && msg.type !== "wefax" && msg.type !== "wefax_progress") {
-    window.trx.map?.statsRecordDecode(msg.type, msg.rig_id || msg.remote || null);
+    window.trx.modules.map?.statsRecordDecode(msg.type, msg.rig_id || msg.remote || null);
-    window.trx.map?.scheduleStatsRender();
+    window.trx.modules.map?.scheduleStatsRender();
   }
 }
 
@@ -6112,10 +6143,10 @@ function dispatchDecodeBatch(batch) {
   // Record statistics for every message in the batch regardless of dispatch path.
   for (const msg of batch) {
     if (msg.type && msg.type !== "lrpt_image" && msg.type !== "lrpt_progress" && msg.type !== "wefax" && msg.type !== "wefax_progress") {
-      window.trx.map?.statsRecordDecode(msg.type, msg.rig_id || msg.remote || null);
+      window.trx.modules.map?.statsRecordDecode(msg.type, msg.rig_id || msg.remote || null);
     }
   }
-  window.trx.map?.scheduleStatsRender();
+  window.trx.modules.map?.scheduleStatsRender();
   const type = String(batch[0]?.type || "");
   const uniformType = batch.every((msg) => String(msg?.type || "") === type);
   if (uniformType) {
@@ -6200,9 +6231,9 @@ function restoreDecodeHistoryGroup(kind, messages) {
   // Record statistics for restored history messages.
   if (kind !== "lrpt_image" && kind !== "lrpt_progress" && kind !== "wefax" && kind !== "wefax_progress") {
     for (const msg of messages) {
-      window.trx.map?.statsRecordDecode(kind, msg.rig_id || msg.remote || null, msg.ts_ms || undefined);
+      window.trx.modules.map?.statsRecordDecode(kind, msg.rig_id || msg.remote || null, msg.ts_ms || undefined);
     }
-    window.trx.map?.scheduleStatsRender();
+    window.trx.modules.map?.scheduleStatsRender();
   }
   if (kind === "ais") {
     if (window.restoreAisHistory) { window.restoreAisHistory(messages); }
@@ -8000,12 +8031,12 @@ window.addEventListener("keydown", (event) => {
   // S — spectrum screenshot (lazy-loads screenshot.js on first use)
   if (key === "s") {
     event.preventDefault();
-    if (window.trx.screenshot) {
+    if (window.trx.modules.screenshot) {
-      void window.trx.screenshot.captureSpectrumScreenshot();
+      void window.trx.modules.screenshot.captureSpectrumScreenshot();
     } else {
       const s = document.createElement("script");
       s.src = "/screenshot.js";
-      s.onload = () => { void window.trx.screenshot?.captureSpectrumScreenshot(); };
+      s.onload = () => { void window.trx.modules.screenshot?.captureSpectrumScreenshot(); };
       document.body.appendChild(s);
     }
     return;

src/trx-client/trx-frontend/trx-frontend-http/assets/web/index.html

@@ -1623,7 +1623,7 @@ SPDX-License-Identifier: GPL-2.0-or-later
       <div id="decode-history-overlay-sub" class="decode-history-overlay-sub">Preparing recent decodes for the UI</div>
     </div>
   </div>
-  <script defer src="https://cdn.jsdelivr.net/npm/opus-decoder@0.7.11/dist/opus-decoder.min.js" charset="UTF-8"></script>
+  <script defer src="/vendor/opus-decoder-0.7.11.min.js" charset="UTF-8"></script>
   <script defer src="/vendor/leaflet.js"></script>
   <script defer src="/leaflet-ais-tracksymbol.js"></script>
   <script defer src="/webgl-renderer.js"></script>

src/trx-client/trx-frontend/trx-frontend-http/assets/web/map-core.js

@@ -3,10 +3,10 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 // Map, statistics, and geolocation module (lazy-loaded on map tab activation).
-// Communicates with app.js core via window.trx namespace.
+// Communicates with app.js through explicit state/core/module services.
 (function () {
   "use strict";
-  const T = window.trx;
+  const { state: T, core: C, modules } = window.trx;
 
   // Destructure shared utility functions for convenience
   const { saveSetting, loadSetting, showHint, escapeMapHtml, formatFreq, formatFreqForHumans,
@@ -14,7 +14,7 @@
           formatUptime, latLonToMaidenhead, locatorToLatLon, haversineKm,
           formatDistanceKm, formatTimeAgo, currentDecodeHistoryRetentionMs,
           formatWavelength, bookmarkDistanceText, buildBookmarkTooltipText,
-          nearestBookmarkForHz } = T;
+          nearestBookmarkForHz } = C;
 
   function updateMapRigFilter() {
     const el = document.getElementById("map-rig-filter");
@@ -261,7 +261,7 @@
     if (canRenderMap) {
       refreshAprsTrack(call, entry);
     } else {
-      T.markDecodeMapSyncPending();
+      C.markDecodeMapSyncPending();
     }
     if (!visible) {
       if (canRenderMap && selectedAprsTrackCall && String(selectedAprsTrackCall) === String(call)) {
@@ -294,7 +294,7 @@
     if (canRenderMap) {
       refreshAisTrack(key, entry);
     } else {
-      T.markDecodeMapSyncPending();
+      C.markDecodeMapSyncPending();
     }
     if (!visible) {
       if (canRenderMap && selectedAisTrackMmsi && String(selectedAisTrackMmsi) === String(key)) {
@@ -337,7 +337,7 @@
       entry.stations = new Set();
       entry.bandMeta = new Map();
       if (canRenderMap) setRetainedMapMarkerVisible(entry.marker, false);
-      else T.markDecodeMapSyncPending();
+      else C.markDecodeMapSyncPending();
       return false;
     }
     const nextStations = new Set();
@@ -352,7 +352,7 @@
     );
     const count = Math.max(nextDetails.size, nextStations.size || 0, 1);
     if (!canRenderMap) {
-      T.markDecodeMapSyncPending();
+      C.markDecodeMapSyncPending();
       return true;
     }
     ensureDecodeLocatorMarker(entry);
@@ -392,7 +392,7 @@
       pruneLocatorEntry(key, entry, cutoffMs);
     }
     if (!aprsMap || T.decodeHistoryReplayActive) {
-      T.markDecodeMapSyncPending();
+      C.markDecodeMapSyncPending();
       return;
     }
     rebuildDecodeContactPaths();
@@ -415,7 +415,7 @@
 
   function locatorFilterColor(type) {
     const hues = locatorThemeHues();
-    const lightTheme = T.currentTheme() === "light";
+    const lightTheme = C.currentTheme() === "light";
     const sat = lightTheme ? 66 : 76;
     const light = lightTheme ? 42 : 56;
     const hue = type === "bookmark"
@@ -539,7 +539,7 @@
   }
 
   function locatorThemeHues() {
-    const pal = T.canvasPalette();
+    const pal = C.canvasPalette();
     const baseHue = paletteHue(pal?.spectrumLine, 145);
     const waveHue = paletteHue(pal?.waveformLine, baseHue + 34);
     const peakHue = paletteHue(pal?.waveformPeak, baseHue - 42);
@@ -560,7 +560,7 @@
 
   function locatorBandChipColor(label) {
     const hues = locatorThemeHues();
-    const lightTheme = T.currentTheme() === "light";
+    const lightTheme = C.currentTheme() === "light";
     const hue = wrapHue(hues.bandBase + locatorBandIndex(label) * 137.508);
     const sat = lightTheme ? 68 : 78;
     const light = lightTheme ? 44 : 58;
@@ -606,7 +606,7 @@
     const safeCount = Math.max(1, Number.isFinite(count) ? count : 1);
     const intensity = Math.min(1, Math.log2(safeCount + 1) / 5);
     const hue = locatorHueForEntry(entry);
-    const lightTheme = T.currentTheme() === "light";
+    const lightTheme = C.currentTheme() === "light";
     const strokeSat = lightTheme ? 62 : 74;
     const fillSat = lightTheme ? 68 : 78;
     const strokeLight = lightTheme ? 40 : 56;
@@ -1573,7 +1573,7 @@
       stageResizeObserver = new ResizeObserver(() => sizeAprsMapToViewport());
       stageResizeObserver.observe(stage);
     }
-    updateMapBaseLayerForTheme(T.currentTheme());
+    updateMapBaseLayerForTheme(C.currentTheme());
     syncAprsReceiverMarker();
 
     // Rebuild popup content on open (keeps age/distance/rig list fresh)
@@ -2307,18 +2307,18 @@
         existing.rigIds.add(msgRigId);
       }
       if (!visible) {
-        if (!T.decodeHistoryMapRenderingDeferred()) {
+        if (!C.decodeHistoryMapRenderingDeferred()) {
           setRetainedMapMarkerVisible(existing.marker, false);
         } else {
-          T.markDecodeMapSyncPending();
+          C.markDecodeMapSyncPending();
         }
         return;
       }
-      if (!T.decodeHistoryMapRenderingDeferred()) {
+      if (!C.decodeHistoryMapRenderingDeferred()) {
         ensureVdesMarker(key, existing);
         setRetainedMapMarkerVisible(existing.marker, true);
       } else {
-        T.markDecodeMapSyncPending();
+        C.markDecodeMapSyncPending();
       }
       if (aprsMap && existing.marker && !T.decodeHistoryReplayActive) {
         existing.marker.setLatLng([msg.lat, msg.lon]);
@@ -2334,11 +2334,11 @@
     };
     vdesMarkers.set(key, entry);
     if (!visible) return;
-    if (!T.decodeHistoryMapRenderingDeferred()) {
+    if (!C.decodeHistoryMapRenderingDeferred()) {
       ensureVdesMarker(key, entry);
       setRetainedMapMarkerVisible(entry.marker, true);
     } else {
-      T.markDecodeMapSyncPending();
+      C.markDecodeMapSyncPending();
     }
     if (aprsMap && entry.marker && !T.decodeHistoryReplayActive) {
       entry.marker.setPopupContent(popupHtml);
@@ -2365,7 +2365,7 @@
         if (T.locationSubtitle) {
           T.locationSubtitle.textContent = `Location: ${grid} · ${label}`;
         }
-        T.updateDocumentTitle(T.activeChannelRds());
+        C.updateDocumentTitle(C.activeChannelRds());
       })
       .catch(() => {});
   }
@@ -2443,8 +2443,8 @@
   }
 
   function scheduleDecodeMapMaintenance() {
-    if (T.decodeHistoryMapRenderingDeferred()) {
+    if (C.decodeHistoryMapRenderingDeferred()) {
-      T.markDecodeMapSyncPending();
+      C.markDecodeMapSyncPending();
       return;
     }
     scheduleUiFrameJob("decode-map-maintenance", () => {
@@ -3461,7 +3461,7 @@
   }
 
   // Register module API for core to call
-  window.trx.map = {
+  modules.map = {
     initAprsMap,
     sizeAprsMapToViewport,
     syncAprsReceiverMarker,

src/trx-client/trx-frontend/trx-frontend-http/assets/web/screenshot.js

@@ -257,7 +257,7 @@
   }
 
   // Register module API
-  window.trx.screenshot = {
+  window.trx.modules.screenshot = {
     captureSpectrumScreenshot,
     buildSpectrumSnapshotCanvas,
     saveCanvasAsPng,

src/trx-client/trx-frontend/trx-frontend-http/src/api/assets.rs

@@ -75,6 +75,13 @@ define_gz_cache!(gz_bandplan_json, status::BANDPLAN_JSON, "bandplan.json");
 // Vendored DSEG14 Classic font
 // (binary woff2 — served directly, not through gz_cache)
 
+// Vendored opus-decoder 0.7.11
+define_gz_cache!(
+    gz_opus_decoder_js,
+    status::OPUS_DECODER_JS,
+    "opus-decoder-0.7.11.min.js"
+);
+
 // Vendored Leaflet 1.9.4
 define_gz_cache!(gz_leaflet_js, status::LEAFLET_JS, "leaflet.js");
 define_gz_cache!(gz_leaflet_css, status::LEAFLET_CSS, "leaflet.css");
@@ -341,6 +348,12 @@ pub(crate) async fn dseg14_classic_woff2() -> impl Responder {
         .body(status::DSEG14_CLASSIC_WOFF2)
 }
 
+#[get("/vendor/opus-decoder-0.7.11.min.js")]
+pub(crate) async fn opus_decoder_js(req: HttpRequest) -> impl Responder {
+    let c = gz_opus_decoder_js();
+    static_asset_response(&req, "application/javascript; charset=utf-8", c)
+}
+
 // ---------------------------------------------------------------------------
 // Vendored Leaflet 1.9.4
 // ---------------------------------------------------------------------------

src/trx-client/trx-frontend/trx-frontend-http/src/api/mod.rs

@@ -668,6 +668,8 @@ pub fn configure(cfg: &mut web::ServiceConfig) {
         .service(assets::bandplan_json)
         // Vendored DSEG14 Classic font
         .service(assets::dseg14_classic_woff2)
+        // Vendored opus-decoder 0.7.11
+        .service(assets::opus_decoder_js)
         // Vendored Leaflet 1.9.4
         .service(assets::leaflet_js)
         .service(assets::leaflet_css)

src/trx-client/trx-frontend/trx-frontend-http/src/status.rs

@@ -40,6 +40,9 @@ pub const BANDPLAN_JSON: &str = include_str!("../assets/web/bandplan.json");
 pub const DSEG14_CLASSIC_WOFF2: &[u8] =
     include_bytes!("../assets/web/vendor/dseg14-classic-latin-400-normal.woff2");
 
+// Vendored opus-decoder 0.7.11 browser build (WebAssembly embedded in JS)
+pub const OPUS_DECODER_JS: &str = include_str!("../assets/web/vendor/opus-decoder-0.7.11.min.js");
+
 // Vendored Leaflet 1.9.4
 pub const LEAFLET_JS: &str = include_str!("../assets/web/vendor/leaflet.js");
 pub const LEAFLET_CSS: &str = include_str!("../assets/web/vendor/leaflet.css");

src/trx-server/src/audio.rs

@@ -8,11 +8,10 @@
 use std::collections::HashMap;
 use std::collections::{HashSet, VecDeque};
 use std::net::SocketAddr;
-use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
+use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::{Arc, Mutex};
 use std::time::{Duration, Instant};
 
-use base64::Engine as _;
 use bytes::Bytes;
 use flate2::write::GzEncoder;
 use flate2::Compression;
@@ -36,7 +35,7 @@ use trx_core::audio::{
 };
 use trx_core::decode::{
     AisMessage, AprsPacket, CwEvent, DecodedMessage, Ft8Message, LrptImage, LrptProgress,
-    VdesMessage, WefaxMessage, WsprMessage,
+    WsprMessage,
 };
 use trx_core::rig::state::{RigMode, RigState};
 use trx_core::vchan::SharedVChanManager;
@@ -47,21 +46,11 @@ use trx_wspr::WsprDecoder;
 use uuid::Uuid;
 
 use crate::config::AudioConfig;
+use crate::history_policy::{
+    current_timestamp_ms, enforce_capacity, lock_or_recover, prune_by_age, MAX_HISTORY_ENTRIES,
+};
 use trx_decode_log::DecoderLoggers;
 
-const APRS_HISTORY_RETENTION: Duration = Duration::from_secs(24 * 60 * 60);
-const HF_APRS_HISTORY_RETENTION: Duration = Duration::from_secs(24 * 60 * 60);
-const AIS_HISTORY_RETENTION: Duration = Duration::from_secs(24 * 60 * 60);
-const VDES_HISTORY_RETENTION: Duration = Duration::from_secs(24 * 60 * 60);
-const CW_HISTORY_RETENTION: Duration = Duration::from_secs(24 * 60 * 60);
-const FT8_HISTORY_RETENTION: Duration = Duration::from_secs(24 * 60 * 60);
-const WSPR_HISTORY_RETENTION: Duration = Duration::from_secs(24 * 60 * 60);
-const LRPT_HISTORY_RETENTION: Duration = Duration::from_secs(24 * 60 * 60);
-const WEFAX_HISTORY_RETENTION: Duration = Duration::from_secs(24 * 60 * 60);
-/// Maximum entries per decoder history queue.  Prevents unbounded memory growth
-/// on busy channels (e.g. AIS near a port).  Oldest entries are evicted when
-/// the limit is reached, independent of the time-based pruning.
-const MAX_HISTORY_ENTRIES: usize = 10_000;
 /// Silence timeout before auto-finalising an LRPT pass (30 s without new MCUs).
 const LRPT_PASS_SILENCE_TIMEOUT: Duration = Duration::from_secs(30);
 const FT8_SAMPLE_RATE: u32 = 12_000;
@@ -75,13 +64,6 @@ const DECODE_AUDIO_GATE_RMS: f32 = 2.5e-4;
 const AUDIO_STREAM_ERROR_LOG_INTERVAL: Duration = Duration::from_secs(60);
 const AUDIO_STREAM_RECOVERY_DELAY: Duration = Duration::from_secs(1);
 
-fn current_timestamp_ms() -> i64 {
-    match std::time::SystemTime::now().duration_since(std::time::UNIX_EPOCH) {
-        Ok(dur) => dur.as_millis() as i64,
-        Err(_) => 0,
-    }
-}
-
 #[cfg(feature = "ft2")]
 fn retain_ft2_window(buf: &mut Vec<f32>) {
     if buf.len() > FT2_ASYNC_BUFFER_SAMPLES {
@@ -360,509 +342,7 @@ fn classify_stream_error(err: &str) -> &'static str {
     }
 }
 
-/// Per-rig decoder history store.
+pub use crate::decoder_history::DecoderHistories;
-///
-/// Replaces the previous process-wide `OnceLock` statics so that each rig
-/// instance can maintain its own independent history.  Pass an
-/// `Arc<DecoderHistories>` into every decoder task and into the audio listener.
-pub struct DecoderHistories {
-    pub ais: Mutex<VecDeque<(Instant, AisMessage)>>,
-    pub vdes: Mutex<VecDeque<(Instant, VdesMessage)>>,
-    pub aprs: Mutex<VecDeque<(Instant, AprsPacket)>>,
-    pub hf_aprs: Mutex<VecDeque<(Instant, AprsPacket)>>,
-    pub cw: Mutex<VecDeque<(Instant, CwEvent)>>,
-    pub ft8: Mutex<VecDeque<(Instant, Ft8Message)>>,
-    pub ft4: Mutex<VecDeque<(Instant, Ft8Message)>>,
-    pub ft2: Mutex<VecDeque<(Instant, Ft8Message)>>,
-    pub wspr: Mutex<VecDeque<(Instant, WsprMessage)>>,
-    pub lrpt: Mutex<VecDeque<(Instant, LrptImage)>>,
-    pub wefax: Mutex<VecDeque<(Instant, WefaxMessage)>>,
-    /// Approximate total entry count across all decoders, maintained
-    /// atomically so `estimated_total_count()` avoids 11 lock acquisitions.
-    total_count: AtomicUsize,
-}
-
-/// Acquire a mutex, recovering from poisoning with a warning log.
-fn lock_or_recover<'a, T>(mutex: &'a Mutex<T>, label: &str) -> std::sync::MutexGuard<'a, T> {
-    mutex.lock().unwrap_or_else(|e| {
-        tracing::warn!(
-            "Mutex for {} was poisoned (prior panic); recovering with potentially inconsistent data",
-            label
-        );
-        e.into_inner()
-    })
-}
-
-/// Enforce capacity limit on a history deque by evicting oldest entries.
-fn enforce_capacity<T>(deque: &mut VecDeque<T>, max: usize) {
-    while deque.len() > max {
-        deque.pop_front();
-    }
-}
-
-/// Drop entries older than `retention` from the front of a time-tagged deque.
-/// Uses `checked_sub` so an early `now` (before `retention` elapses since the
-/// monotonic clock origin) is treated as "no entries are old enough to prune"
-/// rather than panicking.
-fn prune_by_age<T>(deque: &mut VecDeque<(Instant, T)>, retention: Duration, now: Instant) {
-    let Some(cutoff) = now.checked_sub(retention) else {
-        return;
-    };
-    while let Some((ts, _)) = deque.front() {
-        if *ts < cutoff {
-            deque.pop_front();
-        } else {
-            break;
-        }
-    }
-}
-
-impl DecoderHistories {
-    pub fn new() -> Arc<Self> {
-        Arc::new(Self {
-            ais: Mutex::new(VecDeque::new()),
-            vdes: Mutex::new(VecDeque::new()),
-            aprs: Mutex::new(VecDeque::new()),
-            hf_aprs: Mutex::new(VecDeque::new()),
-            cw: Mutex::new(VecDeque::new()),
-            ft8: Mutex::new(VecDeque::new()),
-            ft4: Mutex::new(VecDeque::new()),
-            ft2: Mutex::new(VecDeque::new()),
-            wspr: Mutex::new(VecDeque::new()),
-            lrpt: Mutex::new(VecDeque::new()),
-            wefax: Mutex::new(VecDeque::new()),
-            total_count: AtomicUsize::new(0),
-        })
-    }
-
-    /// Adjust the atomic total count after a record/prune/clear operation.
-    ///
-    /// Uses a CAS loop for decrements to prevent underflow wrapping the
-    /// counter to `usize::MAX` (which would cause a capacity-overflow panic
-    /// when pre-allocating the history replay blob).
-    fn adjust_total_count(&self, old_len: usize, new_len: usize) {
-        if new_len > old_len {
-            self.total_count
-                .fetch_add(new_len - old_len, Ordering::Relaxed);
-        } else if old_len > new_len {
-            let delta = old_len - new_len;
-            let mut current = self.total_count.load(Ordering::Relaxed);
-            loop {
-                let next = current.saturating_sub(delta);
-                match self.total_count.compare_exchange_weak(
-                    current,
-                    next,
-                    Ordering::Relaxed,
-                    Ordering::Relaxed,
-                ) {
-                    Ok(_) => break,
-                    Err(actual) => current = actual,
-                }
-            }
-        }
-    }
-
-    // --- AIS ---
-
-    fn prune_ais(history: &mut VecDeque<(Instant, AisMessage)>) {
-        prune_by_age(history, AIS_HISTORY_RETENTION, Instant::now());
-    }
-
-    pub fn record_ais_message(&self, mut msg: AisMessage) {
-        if msg.ts_ms.is_none() {
-            msg.ts_ms = Some(current_timestamp_ms());
-        }
-        let mut h = lock_or_recover(&self.ais, "ais_history");
-        let before = h.len();
-        h.push_back((Instant::now(), msg));
-        Self::prune_ais(&mut h);
-        enforce_capacity(&mut h, MAX_HISTORY_ENTRIES);
-        self.adjust_total_count(before, h.len());
-    }
-
-    pub fn snapshot_ais_history(&self) -> Vec<AisMessage> {
-        let mut h = lock_or_recover(&self.ais, "ais_history");
-        let before = h.len();
-        Self::prune_ais(&mut h);
-        self.adjust_total_count(before, h.len());
-        h.iter().map(|(_, msg)| msg.clone()).collect()
-    }
-
-    // --- VDES ---
-
-    fn prune_vdes(history: &mut VecDeque<(Instant, VdesMessage)>) {
-        prune_by_age(history, VDES_HISTORY_RETENTION, Instant::now());
-    }
-
-    pub fn record_vdes_message(&self, mut msg: VdesMessage) {
-        if msg.ts_ms.is_none() {
-            msg.ts_ms = Some(current_timestamp_ms());
-        }
-        let mut h = lock_or_recover(&self.vdes, "vdes_history");
-        let before = h.len();
-        h.push_back((Instant::now(), msg));
-        Self::prune_vdes(&mut h);
-        enforce_capacity(&mut h, MAX_HISTORY_ENTRIES);
-        self.adjust_total_count(before, h.len());
-    }
-
-    pub fn snapshot_vdes_history(&self) -> Vec<VdesMessage> {
-        let mut h = lock_or_recover(&self.vdes, "vdes_history");
-        let before = h.len();
-        Self::prune_vdes(&mut h);
-        self.adjust_total_count(before, h.len());
-        h.iter().map(|(_, msg)| msg.clone()).collect()
-    }
-
-    // --- APRS ---
-
-    fn prune_aprs(history: &mut VecDeque<(Instant, AprsPacket)>) {
-        prune_by_age(history, APRS_HISTORY_RETENTION, Instant::now());
-    }
-
-    pub fn record_aprs_packet(&self, mut pkt: AprsPacket) {
-        if !pkt.crc_ok {
-            return;
-        }
-        if pkt.ts_ms.is_none() {
-            pkt.ts_ms = Some(current_timestamp_ms());
-        }
-        let mut h = lock_or_recover(&self.aprs, "aprs_history");
-        let before = h.len();
-        h.push_back((Instant::now(), pkt));
-        Self::prune_aprs(&mut h);
-        enforce_capacity(&mut h, MAX_HISTORY_ENTRIES);
-        self.adjust_total_count(before, h.len());
-    }
-
-    pub fn snapshot_aprs_history(&self) -> Vec<AprsPacket> {
-        let mut h = lock_or_recover(&self.aprs, "aprs_history");
-        let before = h.len();
-        Self::prune_aprs(&mut h);
-        self.adjust_total_count(before, h.len());
-        h.iter()
-            .map(|(_, pkt): &(Instant, AprsPacket)| pkt.clone())
-            .collect()
-    }
-
-    pub fn clear_aprs_history(&self) {
-        let mut h = lock_or_recover(&self.aprs, "aprs_history");
-        let before = h.len();
-        h.clear();
-        self.adjust_total_count(before, 0);
-    }
-
-    // --- HF APRS ---
-
-    fn prune_hf_aprs(history: &mut VecDeque<(Instant, AprsPacket)>) {
-        prune_by_age(history, HF_APRS_HISTORY_RETENTION, Instant::now());
-    }
-
-    pub fn record_hf_aprs_packet(&self, mut pkt: AprsPacket) {
-        if !pkt.crc_ok {
-            return;
-        }
-        if pkt.ts_ms.is_none() {
-            pkt.ts_ms = Some(current_timestamp_ms());
-        }
-        let mut h = lock_or_recover(&self.hf_aprs, "hf_aprs_history");
-        let before = h.len();
-        h.push_back((Instant::now(), pkt));
-        Self::prune_hf_aprs(&mut h);
-        enforce_capacity(&mut h, MAX_HISTORY_ENTRIES);
-        self.adjust_total_count(before, h.len());
-    }
-
-    pub fn snapshot_hf_aprs_history(&self) -> Vec<AprsPacket> {
-        let mut h = lock_or_recover(&self.hf_aprs, "hf_aprs_history");
-        let before = h.len();
-        Self::prune_hf_aprs(&mut h);
-        self.adjust_total_count(before, h.len());
-        h.iter()
-            .map(|(_, pkt): &(Instant, AprsPacket)| pkt.clone())
-            .collect()
-    }
-
-    pub fn clear_hf_aprs_history(&self) {
-        let mut h = lock_or_recover(&self.hf_aprs, "hf_aprs_history");
-        let before = h.len();
-        h.clear();
-        self.adjust_total_count(before, 0);
-    }
-
-    // --- CW ---
-
-    fn prune_cw(history: &mut VecDeque<(Instant, CwEvent)>) {
-        prune_by_age(history, CW_HISTORY_RETENTION, Instant::now());
-    }
-
-    pub fn record_cw_event(&self, evt: CwEvent) {
-        let mut h = lock_or_recover(&self.cw, "cw_history");
-        let before = h.len();
-        h.push_back((Instant::now(), evt));
-        Self::prune_cw(&mut h);
-        enforce_capacity(&mut h, MAX_HISTORY_ENTRIES);
-        self.adjust_total_count(before, h.len());
-    }
-
-    pub fn snapshot_cw_history(&self) -> Vec<CwEvent> {
-        let mut h = lock_or_recover(&self.cw, "cw_history");
-        let before = h.len();
-        Self::prune_cw(&mut h);
-        self.adjust_total_count(before, h.len());
-        h.iter()
-            .map(|(_, evt): &(Instant, CwEvent)| evt.clone())
-            .collect()
-    }
-
-    pub fn clear_cw_history(&self) {
-        let mut h = lock_or_recover(&self.cw, "cw_history");
-        let before = h.len();
-        h.clear();
-        self.adjust_total_count(before, 0);
-    }
-
-    // --- FT8 ---
-
-    fn prune_ft8(history: &mut VecDeque<(Instant, Ft8Message)>) {
-        prune_by_age(history, FT8_HISTORY_RETENTION, Instant::now());
-    }
-
-    pub fn record_ft8_message(&self, msg: Ft8Message) {
-        let mut h = lock_or_recover(&self.ft8, "ft8_history");
-        let before = h.len();
-        h.push_back((Instant::now(), msg));
-        Self::prune_ft8(&mut h);
-        enforce_capacity(&mut h, MAX_HISTORY_ENTRIES);
-        self.adjust_total_count(before, h.len());
-    }
-
-    pub fn snapshot_ft8_history(&self) -> Vec<Ft8Message> {
-        let mut h = lock_or_recover(&self.ft8, "ft8_history");
-        let before = h.len();
-        Self::prune_ft8(&mut h);
-        self.adjust_total_count(before, h.len());
-        h.iter()
-            .map(|(_, msg): &(Instant, Ft8Message)| msg.clone())
-            .collect()
-    }
-
-    pub fn clear_ft8_history(&self) {
-        let mut h = lock_or_recover(&self.ft8, "ft8_history");
-        let before = h.len();
-        h.clear();
-        self.adjust_total_count(before, 0);
-    }
-
-    // --- FT4 ---
-
-    fn prune_ft4(history: &mut VecDeque<(Instant, Ft8Message)>) {
-        prune_by_age(history, FT8_HISTORY_RETENTION, Instant::now());
-    }
-
-    pub fn record_ft4_message(&self, msg: Ft8Message) {
-        let mut h = lock_or_recover(&self.ft4, "ft4_history");
-        let before = h.len();
-        h.push_back((Instant::now(), msg));
-        Self::prune_ft4(&mut h);
-        enforce_capacity(&mut h, MAX_HISTORY_ENTRIES);
-        self.adjust_total_count(before, h.len());
-    }
-
-    pub fn snapshot_ft4_history(&self) -> Vec<Ft8Message> {
-        let mut h = lock_or_recover(&self.ft4, "ft4_history");
-        let before = h.len();
-        Self::prune_ft4(&mut h);
-        self.adjust_total_count(before, h.len());
-        h.iter()
-            .map(|(_, msg): &(Instant, Ft8Message)| msg.clone())
-            .collect()
-    }
-
-    pub fn clear_ft4_history(&self) {
-        let mut h = lock_or_recover(&self.ft4, "ft4_history");
-        let before = h.len();
-        h.clear();
-        self.adjust_total_count(before, 0);
-    }
-
-    // --- FT2 ---
-
-    #[cfg_attr(not(feature = "ft2"), allow(dead_code))]
-    fn prune_ft2(history: &mut VecDeque<(Instant, Ft8Message)>) {
-        prune_by_age(history, FT8_HISTORY_RETENTION, Instant::now());
-    }
-
-    #[cfg_attr(not(feature = "ft2"), allow(dead_code))]
-    pub fn record_ft2_message(&self, msg: Ft8Message) {
-        let mut h = lock_or_recover(&self.ft2, "ft2_history");
-        let before = h.len();
-        h.push_back((Instant::now(), msg));
-        Self::prune_ft2(&mut h);
-        enforce_capacity(&mut h, MAX_HISTORY_ENTRIES);
-        self.adjust_total_count(before, h.len());
-    }
-
-    #[cfg_attr(not(feature = "ft2"), allow(dead_code))]
-    pub fn snapshot_ft2_history(&self) -> Vec<Ft8Message> {
-        let mut h = lock_or_recover(&self.ft2, "ft2_history");
-        let before = h.len();
-        Self::prune_ft2(&mut h);
-        self.adjust_total_count(before, h.len());
-        h.iter()
-            .map(|(_, msg): &(Instant, Ft8Message)| msg.clone())
-            .collect()
-    }
-
-    pub fn clear_ft2_history(&self) {
-        let mut h = lock_or_recover(&self.ft2, "ft2_history");
-        let before = h.len();
-        h.clear();
-        self.adjust_total_count(before, 0);
-    }
-
-    // --- WSPR ---
-
-    fn prune_wspr(history: &mut VecDeque<(Instant, WsprMessage)>) {
-        prune_by_age(history, WSPR_HISTORY_RETENTION, Instant::now());
-    }
-
-    pub fn record_wspr_message(&self, msg: WsprMessage) {
-        let mut h = lock_or_recover(&self.wspr, "wspr_history");
-        let before = h.len();
-        h.push_back((Instant::now(), msg));
-        Self::prune_wspr(&mut h);
-        enforce_capacity(&mut h, MAX_HISTORY_ENTRIES);
-        self.adjust_total_count(before, h.len());
-    }
-
-    pub fn snapshot_wspr_history(&self) -> Vec<WsprMessage> {
-        let mut h = lock_or_recover(&self.wspr, "wspr_history");
-        let before = h.len();
-        Self::prune_wspr(&mut h);
-        self.adjust_total_count(before, h.len());
-        h.iter()
-            .map(|(_, msg): &(Instant, WsprMessage)| msg.clone())
-            .collect()
-    }
-
-    pub fn clear_wspr_history(&self) {
-        let mut h = lock_or_recover(&self.wspr, "wspr_history");
-        let before = h.len();
-        h.clear();
-        self.adjust_total_count(before, 0);
-    }
-
-    // --- LRPT ---
-
-    fn prune_lrpt(history: &mut VecDeque<(Instant, LrptImage)>) {
-        prune_by_age(history, LRPT_HISTORY_RETENTION, Instant::now());
-    }
-
-    pub fn record_lrpt_image(&self, mut img: LrptImage) {
-        if img.ts_ms.is_none() {
-            img.ts_ms = Some(current_timestamp_ms());
-        }
-        let mut h = lock_or_recover(&self.lrpt, "lrpt_history");
-        let before = h.len();
-        h.push_back((Instant::now(), img));
-        Self::prune_lrpt(&mut h);
-        enforce_capacity(&mut h, MAX_HISTORY_ENTRIES);
-        self.adjust_total_count(before, h.len());
-    }
-
-    pub fn snapshot_lrpt_history(&self) -> Vec<LrptImage> {
-        let mut h = lock_or_recover(&self.lrpt, "lrpt_history");
-        let before = h.len();
-        Self::prune_lrpt(&mut h);
-        self.adjust_total_count(before, h.len());
-        h.iter()
-            .map(|(_, img): &(Instant, LrptImage)| img.clone())
-            .collect()
-    }
-
-    pub fn clear_lrpt_history(&self) {
-        let mut h = lock_or_recover(&self.lrpt, "lrpt_history");
-        let before = h.len();
-        h.clear();
-        self.adjust_total_count(before, 0);
-    }
-
-    // --- WEFAX ---
-
-    fn prune_wefax(history: &mut VecDeque<(Instant, WefaxMessage)>) {
-        prune_by_age(history, WEFAX_HISTORY_RETENTION, Instant::now());
-    }
-
-    pub fn record_wefax_message(&self, mut msg: WefaxMessage) {
-        if msg.ts_ms.is_none() {
-            msg.ts_ms = Some(current_timestamp_ms());
-        }
-        // Strip bulk PNG data before storing in memory/persistence.
-        msg.png_data = None;
-        let mut h = lock_or_recover(&self.wefax, "wefax_history");
-        let before = h.len();
-        h.push_back((Instant::now(), msg));
-        Self::prune_wefax(&mut h);
-        enforce_capacity(&mut h, MAX_HISTORY_ENTRIES);
-        self.adjust_total_count(before, h.len());
-    }
-
-    pub fn snapshot_wefax_history(&self) -> Vec<WefaxMessage> {
-        let mut h = lock_or_recover(&self.wefax, "wefax_history");
-        let before = h.len();
-        Self::prune_wefax(&mut h);
-        self.adjust_total_count(before, h.len());
-        h.iter()
-            .map(|(_, msg)| {
-                let mut m = msg.clone();
-                // Re-read PNG from disk so remote clients can save a local copy.
-                if m.png_data.is_none() {
-                    if let Some(ref path) = m.path {
-                        if let Ok(bytes) = std::fs::read(path) {
-                            m.png_data =
-                                Some(base64::engine::general_purpose::STANDARD.encode(&bytes));
-                        }
-                    }
-                }
-                m
-            })
-            .collect()
-    }
-
-    pub fn clear_wefax_history(&self) {
-        let mut h = lock_or_recover(&self.wefax, "wefax_history");
-        let before = h.len();
-        h.clear();
-        self.adjust_total_count(before, 0);
-    }
-
-    /// Returns a quick (non-pruning) estimate of the total number of history
-    /// entries across all decoders, used for pre-allocating the replay blob.
-    ///
-    /// Uses an `AtomicUsize` counter maintained by record/prune/clear methods,
-    /// avoiding 9 separate mutex acquisitions.
-    pub fn estimated_total_count(&self) -> usize {
-        self.total_count.load(Ordering::Relaxed)
-    }
-
-    /// Rebuild the aggregate count after bulk restoration bypasses the normal
-    /// record methods.
-    pub(crate) fn recalculate_total_count(&self) {
-        let total = lock_or_recover(&self.ais, "ais_history").len()
-            + lock_or_recover(&self.vdes, "vdes_history").len()
-            + lock_or_recover(&self.aprs, "aprs_history").len()
-            + lock_or_recover(&self.hf_aprs, "hf_aprs_history").len()
-            + lock_or_recover(&self.cw, "cw_history").len()
-            + lock_or_recover(&self.ft8, "ft8_history").len()
-            + lock_or_recover(&self.ft4, "ft4_history").len()
-            + lock_or_recover(&self.ft2, "ft2_history").len()
-            + lock_or_recover(&self.wspr, "wspr_history").len()
-            + lock_or_recover(&self.lrpt, "lrpt_history").len()
-            + lock_or_recover(&self.wefax, "wefax_history").len();
-        self.total_count.store(total, Ordering::Relaxed);
-    }
-}
 
 /// Spawn the audio capture thread.
 ///

src/trx-server/src/decoder_history.rs

@@ -0,0 +1,489 @@
+// SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+//
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+//! Per-rig storage and lifecycle operations for decoded-message histories.
+
+use std::collections::VecDeque;
+use std::sync::atomic::{AtomicUsize, Ordering};
+use std::sync::{Arc, Mutex};
+use std::time::Instant;
+
+use base64::Engine as _;
+use trx_core::decode::{
+    AisMessage, AprsPacket, CwEvent, Ft8Message, LrptImage, VdesMessage, WefaxMessage, WsprMessage,
+};
+
+use crate::history_policy::{
+    current_timestamp_ms, enforce_capacity, lock_or_recover, prune_by_age, HISTORY_RETENTION,
+    MAX_HISTORY_ENTRIES,
+};
+
+/// Per-rig decoder history store.
+///
+/// Replaces the previous process-wide `OnceLock` statics so that each rig
+/// instance can maintain its own independent history.  Pass an
+/// `Arc<DecoderHistories>` into every decoder task and into the audio listener.
+pub struct DecoderHistories {
+    pub ais: Mutex<VecDeque<(Instant, AisMessage)>>,
+    pub vdes: Mutex<VecDeque<(Instant, VdesMessage)>>,
+    pub aprs: Mutex<VecDeque<(Instant, AprsPacket)>>,
+    pub hf_aprs: Mutex<VecDeque<(Instant, AprsPacket)>>,
+    pub cw: Mutex<VecDeque<(Instant, CwEvent)>>,
+    pub ft8: Mutex<VecDeque<(Instant, Ft8Message)>>,
+    pub ft4: Mutex<VecDeque<(Instant, Ft8Message)>>,
+    pub ft2: Mutex<VecDeque<(Instant, Ft8Message)>>,
+    pub wspr: Mutex<VecDeque<(Instant, WsprMessage)>>,
+    pub lrpt: Mutex<VecDeque<(Instant, LrptImage)>>,
+    pub wefax: Mutex<VecDeque<(Instant, WefaxMessage)>>,
+    /// Approximate total entry count across all decoders, maintained
+    /// atomically so `estimated_total_count()` avoids 11 lock acquisitions.
+    total_count: AtomicUsize,
+}
+
+impl DecoderHistories {
+    pub fn new() -> Arc<Self> {
+        Arc::new(Self {
+            ais: Mutex::new(VecDeque::new()),
+            vdes: Mutex::new(VecDeque::new()),
+            aprs: Mutex::new(VecDeque::new()),
+            hf_aprs: Mutex::new(VecDeque::new()),
+            cw: Mutex::new(VecDeque::new()),
+            ft8: Mutex::new(VecDeque::new()),
+            ft4: Mutex::new(VecDeque::new()),
+            ft2: Mutex::new(VecDeque::new()),
+            wspr: Mutex::new(VecDeque::new()),
+            lrpt: Mutex::new(VecDeque::new()),
+            wefax: Mutex::new(VecDeque::new()),
+            total_count: AtomicUsize::new(0),
+        })
+    }
+
+    /// Adjust the atomic total count after a record/prune/clear operation.
+    ///
+    /// Uses a CAS loop for decrements to prevent underflow wrapping the
+    /// counter to `usize::MAX` (which would cause a capacity-overflow panic
+    /// when pre-allocating the history replay blob).
+    pub(crate) fn adjust_total_count(&self, old_len: usize, new_len: usize) {
+        if new_len > old_len {
+            self.total_count
+                .fetch_add(new_len - old_len, Ordering::Relaxed);
+        } else if old_len > new_len {
+            let delta = old_len - new_len;
+            let mut current = self.total_count.load(Ordering::Relaxed);
+            loop {
+                let next = current.saturating_sub(delta);
+                match self.total_count.compare_exchange_weak(
+                    current,
+                    next,
+                    Ordering::Relaxed,
+                    Ordering::Relaxed,
+                ) {
+                    Ok(_) => break,
+                    Err(actual) => current = actual,
+                }
+            }
+        }
+    }
+
+    // --- AIS ---
+
+    fn prune_ais(history: &mut VecDeque<(Instant, AisMessage)>) {
+        prune_by_age(history, HISTORY_RETENTION, Instant::now());
+    }
+
+    pub fn record_ais_message(&self, mut msg: AisMessage) {
+        if msg.ts_ms.is_none() {
+            msg.ts_ms = Some(current_timestamp_ms());
+        }
+        let mut h = lock_or_recover(&self.ais, "ais_history");
+        let before = h.len();
+        h.push_back((Instant::now(), msg));
+        Self::prune_ais(&mut h);
+        enforce_capacity(&mut h, MAX_HISTORY_ENTRIES);
+        self.adjust_total_count(before, h.len());
+    }
+
+    pub fn snapshot_ais_history(&self) -> Vec<AisMessage> {
+        let mut h = lock_or_recover(&self.ais, "ais_history");
+        let before = h.len();
+        Self::prune_ais(&mut h);
+        self.adjust_total_count(before, h.len());
+        h.iter().map(|(_, msg)| msg.clone()).collect()
+    }
+
+    // --- VDES ---
+
+    fn prune_vdes(history: &mut VecDeque<(Instant, VdesMessage)>) {
+        prune_by_age(history, HISTORY_RETENTION, Instant::now());
+    }
+
+    pub fn record_vdes_message(&self, mut msg: VdesMessage) {
+        if msg.ts_ms.is_none() {
+            msg.ts_ms = Some(current_timestamp_ms());
+        }
+        let mut h = lock_or_recover(&self.vdes, "vdes_history");
+        let before = h.len();
+        h.push_back((Instant::now(), msg));
+        Self::prune_vdes(&mut h);
+        enforce_capacity(&mut h, MAX_HISTORY_ENTRIES);
+        self.adjust_total_count(before, h.len());
+    }
+
+    pub fn snapshot_vdes_history(&self) -> Vec<VdesMessage> {
+        let mut h = lock_or_recover(&self.vdes, "vdes_history");
+        let before = h.len();
+        Self::prune_vdes(&mut h);
+        self.adjust_total_count(before, h.len());
+        h.iter().map(|(_, msg)| msg.clone()).collect()
+    }
+
+    // --- APRS ---
+
+    fn prune_aprs(history: &mut VecDeque<(Instant, AprsPacket)>) {
+        prune_by_age(history, HISTORY_RETENTION, Instant::now());
+    }
+
+    pub fn record_aprs_packet(&self, mut pkt: AprsPacket) {
+        if !pkt.crc_ok {
+            return;
+        }
+        if pkt.ts_ms.is_none() {
+            pkt.ts_ms = Some(current_timestamp_ms());
+        }
+        let mut h = lock_or_recover(&self.aprs, "aprs_history");
+        let before = h.len();
+        h.push_back((Instant::now(), pkt));
+        Self::prune_aprs(&mut h);
+        enforce_capacity(&mut h, MAX_HISTORY_ENTRIES);
+        self.adjust_total_count(before, h.len());
+    }
+
+    pub fn snapshot_aprs_history(&self) -> Vec<AprsPacket> {
+        let mut h = lock_or_recover(&self.aprs, "aprs_history");
+        let before = h.len();
+        Self::prune_aprs(&mut h);
+        self.adjust_total_count(before, h.len());
+        h.iter()
+            .map(|(_, pkt): &(Instant, AprsPacket)| pkt.clone())
+            .collect()
+    }
+
+    pub fn clear_aprs_history(&self) {
+        let mut h = lock_or_recover(&self.aprs, "aprs_history");
+        let before = h.len();
+        h.clear();
+        self.adjust_total_count(before, 0);
+    }
+
+    // --- HF APRS ---
+
+    fn prune_hf_aprs(history: &mut VecDeque<(Instant, AprsPacket)>) {
+        prune_by_age(history, HISTORY_RETENTION, Instant::now());
+    }
+
+    pub fn record_hf_aprs_packet(&self, mut pkt: AprsPacket) {
+        if !pkt.crc_ok {
+            return;
+        }
+        if pkt.ts_ms.is_none() {
+            pkt.ts_ms = Some(current_timestamp_ms());
+        }
+        let mut h = lock_or_recover(&self.hf_aprs, "hf_aprs_history");
+        let before = h.len();
+        h.push_back((Instant::now(), pkt));
+        Self::prune_hf_aprs(&mut h);
+        enforce_capacity(&mut h, MAX_HISTORY_ENTRIES);
+        self.adjust_total_count(before, h.len());
+    }
+
+    pub fn snapshot_hf_aprs_history(&self) -> Vec<AprsPacket> {
+        let mut h = lock_or_recover(&self.hf_aprs, "hf_aprs_history");
+        let before = h.len();
+        Self::prune_hf_aprs(&mut h);
+        self.adjust_total_count(before, h.len());
+        h.iter()
+            .map(|(_, pkt): &(Instant, AprsPacket)| pkt.clone())
+            .collect()
+    }
+
+    pub fn clear_hf_aprs_history(&self) {
+        let mut h = lock_or_recover(&self.hf_aprs, "hf_aprs_history");
+        let before = h.len();
+        h.clear();
+        self.adjust_total_count(before, 0);
+    }
+
+    // --- CW ---
+
+    fn prune_cw(history: &mut VecDeque<(Instant, CwEvent)>) {
+        prune_by_age(history, HISTORY_RETENTION, Instant::now());
+    }
+
+    pub fn record_cw_event(&self, evt: CwEvent) {
+        let mut h = lock_or_recover(&self.cw, "cw_history");
+        let before = h.len();
+        h.push_back((Instant::now(), evt));
+        Self::prune_cw(&mut h);
+        enforce_capacity(&mut h, MAX_HISTORY_ENTRIES);
+        self.adjust_total_count(before, h.len());
+    }
+
+    pub fn snapshot_cw_history(&self) -> Vec<CwEvent> {
+        let mut h = lock_or_recover(&self.cw, "cw_history");
+        let before = h.len();
+        Self::prune_cw(&mut h);
+        self.adjust_total_count(before, h.len());
+        h.iter()
+            .map(|(_, evt): &(Instant, CwEvent)| evt.clone())
+            .collect()
+    }
+
+    pub fn clear_cw_history(&self) {
+        let mut h = lock_or_recover(&self.cw, "cw_history");
+        let before = h.len();
+        h.clear();
+        self.adjust_total_count(before, 0);
+    }
+
+    // --- FT8 ---
+
+    fn prune_ft8(history: &mut VecDeque<(Instant, Ft8Message)>) {
+        prune_by_age(history, HISTORY_RETENTION, Instant::now());
+    }
+
+    pub fn record_ft8_message(&self, msg: Ft8Message) {
+        let mut h = lock_or_recover(&self.ft8, "ft8_history");
+        let before = h.len();
+        h.push_back((Instant::now(), msg));
+        Self::prune_ft8(&mut h);
+        enforce_capacity(&mut h, MAX_HISTORY_ENTRIES);
+        self.adjust_total_count(before, h.len());
+    }
+
+    pub fn snapshot_ft8_history(&self) -> Vec<Ft8Message> {
+        let mut h = lock_or_recover(&self.ft8, "ft8_history");
+        let before = h.len();
+        Self::prune_ft8(&mut h);
+        self.adjust_total_count(before, h.len());
+        h.iter()
+            .map(|(_, msg): &(Instant, Ft8Message)| msg.clone())
+            .collect()
+    }
+
+    pub fn clear_ft8_history(&self) {
+        let mut h = lock_or_recover(&self.ft8, "ft8_history");
+        let before = h.len();
+        h.clear();
+        self.adjust_total_count(before, 0);
+    }
+
+    // --- FT4 ---
+
+    fn prune_ft4(history: &mut VecDeque<(Instant, Ft8Message)>) {
+        prune_by_age(history, HISTORY_RETENTION, Instant::now());
+    }
+
+    pub fn record_ft4_message(&self, msg: Ft8Message) {
+        let mut h = lock_or_recover(&self.ft4, "ft4_history");
+        let before = h.len();
+        h.push_back((Instant::now(), msg));
+        Self::prune_ft4(&mut h);
+        enforce_capacity(&mut h, MAX_HISTORY_ENTRIES);
+        self.adjust_total_count(before, h.len());
+    }
+
+    pub fn snapshot_ft4_history(&self) -> Vec<Ft8Message> {
+        let mut h = lock_or_recover(&self.ft4, "ft4_history");
+        let before = h.len();
+        Self::prune_ft4(&mut h);
+        self.adjust_total_count(before, h.len());
+        h.iter()
+            .map(|(_, msg): &(Instant, Ft8Message)| msg.clone())
+            .collect()
+    }
+
+    pub fn clear_ft4_history(&self) {
+        let mut h = lock_or_recover(&self.ft4, "ft4_history");
+        let before = h.len();
+        h.clear();
+        self.adjust_total_count(before, 0);
+    }
+
+    // --- FT2 ---
+
+    #[cfg_attr(not(feature = "ft2"), allow(dead_code))]
+    fn prune_ft2(history: &mut VecDeque<(Instant, Ft8Message)>) {
+        prune_by_age(history, HISTORY_RETENTION, Instant::now());
+    }
+
+    #[cfg_attr(not(feature = "ft2"), allow(dead_code))]
+    pub fn record_ft2_message(&self, msg: Ft8Message) {
+        let mut h = lock_or_recover(&self.ft2, "ft2_history");
+        let before = h.len();
+        h.push_back((Instant::now(), msg));
+        Self::prune_ft2(&mut h);
+        enforce_capacity(&mut h, MAX_HISTORY_ENTRIES);
+        self.adjust_total_count(before, h.len());
+    }
+
+    #[cfg_attr(not(feature = "ft2"), allow(dead_code))]
+    pub fn snapshot_ft2_history(&self) -> Vec<Ft8Message> {
+        let mut h = lock_or_recover(&self.ft2, "ft2_history");
+        let before = h.len();
+        Self::prune_ft2(&mut h);
+        self.adjust_total_count(before, h.len());
+        h.iter()
+            .map(|(_, msg): &(Instant, Ft8Message)| msg.clone())
+            .collect()
+    }
+
+    pub fn clear_ft2_history(&self) {
+        let mut h = lock_or_recover(&self.ft2, "ft2_history");
+        let before = h.len();
+        h.clear();
+        self.adjust_total_count(before, 0);
+    }
+
+    // --- WSPR ---
+
+    fn prune_wspr(history: &mut VecDeque<(Instant, WsprMessage)>) {
+        prune_by_age(history, HISTORY_RETENTION, Instant::now());
+    }
+
+    pub fn record_wspr_message(&self, msg: WsprMessage) {
+        let mut h = lock_or_recover(&self.wspr, "wspr_history");
+        let before = h.len();
+        h.push_back((Instant::now(), msg));
+        Self::prune_wspr(&mut h);
+        enforce_capacity(&mut h, MAX_HISTORY_ENTRIES);
+        self.adjust_total_count(before, h.len());
+    }
+
+    pub fn snapshot_wspr_history(&self) -> Vec<WsprMessage> {
+        let mut h = lock_or_recover(&self.wspr, "wspr_history");
+        let before = h.len();
+        Self::prune_wspr(&mut h);
+        self.adjust_total_count(before, h.len());
+        h.iter()
+            .map(|(_, msg): &(Instant, WsprMessage)| msg.clone())
+            .collect()
+    }
+
+    pub fn clear_wspr_history(&self) {
+        let mut h = lock_or_recover(&self.wspr, "wspr_history");
+        let before = h.len();
+        h.clear();
+        self.adjust_total_count(before, 0);
+    }
+
+    // --- LRPT ---
+
+    fn prune_lrpt(history: &mut VecDeque<(Instant, LrptImage)>) {
+        prune_by_age(history, HISTORY_RETENTION, Instant::now());
+    }
+
+    pub fn record_lrpt_image(&self, mut img: LrptImage) {
+        if img.ts_ms.is_none() {
+            img.ts_ms = Some(current_timestamp_ms());
+        }
+        let mut h = lock_or_recover(&self.lrpt, "lrpt_history");
+        let before = h.len();
+        h.push_back((Instant::now(), img));
+        Self::prune_lrpt(&mut h);
+        enforce_capacity(&mut h, MAX_HISTORY_ENTRIES);
+        self.adjust_total_count(before, h.len());
+    }
+
+    pub fn snapshot_lrpt_history(&self) -> Vec<LrptImage> {
+        let mut h = lock_or_recover(&self.lrpt, "lrpt_history");
+        let before = h.len();
+        Self::prune_lrpt(&mut h);
+        self.adjust_total_count(before, h.len());
+        h.iter()
+            .map(|(_, img): &(Instant, LrptImage)| img.clone())
+            .collect()
+    }
+
+    pub fn clear_lrpt_history(&self) {
+        let mut h = lock_or_recover(&self.lrpt, "lrpt_history");
+        let before = h.len();
+        h.clear();
+        self.adjust_total_count(before, 0);
+    }
+
+    // --- WEFAX ---
+
+    fn prune_wefax(history: &mut VecDeque<(Instant, WefaxMessage)>) {
+        prune_by_age(history, HISTORY_RETENTION, Instant::now());
+    }
+
+    pub fn record_wefax_message(&self, mut msg: WefaxMessage) {
+        if msg.ts_ms.is_none() {
+            msg.ts_ms = Some(current_timestamp_ms());
+        }
+        // Strip bulk PNG data before storing in memory/persistence.
+        msg.png_data = None;
+        let mut h = lock_or_recover(&self.wefax, "wefax_history");
+        let before = h.len();
+        h.push_back((Instant::now(), msg));
+        Self::prune_wefax(&mut h);
+        enforce_capacity(&mut h, MAX_HISTORY_ENTRIES);
+        self.adjust_total_count(before, h.len());
+    }
+
+    pub fn snapshot_wefax_history(&self) -> Vec<WefaxMessage> {
+        let mut h = lock_or_recover(&self.wefax, "wefax_history");
+        let before = h.len();
+        Self::prune_wefax(&mut h);
+        self.adjust_total_count(before, h.len());
+        h.iter()
+            .map(|(_, msg)| {
+                let mut m = msg.clone();
+                // Re-read PNG from disk so remote clients can save a local copy.
+                if m.png_data.is_none() {
+                    if let Some(ref path) = m.path {
+                        if let Ok(bytes) = std::fs::read(path) {
+                            m.png_data =
+                                Some(base64::engine::general_purpose::STANDARD.encode(&bytes));
+                        }
+                    }
+                }
+                m
+            })
+            .collect()
+    }
+
+    pub fn clear_wefax_history(&self) {
+        let mut h = lock_or_recover(&self.wefax, "wefax_history");
+        let before = h.len();
+        h.clear();
+        self.adjust_total_count(before, 0);
+    }
+
+    /// Returns a quick (non-pruning) estimate of the total number of history
+    /// entries across all decoders, used for pre-allocating the replay blob.
+    ///
+    /// Uses an `AtomicUsize` counter maintained by record/prune/clear methods,
+    /// avoiding 11 separate mutex acquisitions.
+    pub fn estimated_total_count(&self) -> usize {
+        self.total_count.load(Ordering::Relaxed)
+    }
+
+    /// Rebuild the aggregate count after bulk restoration bypasses the normal
+    /// record methods.
+    pub(crate) fn recalculate_total_count(&self) {
+        let total = lock_or_recover(&self.ais, "ais_history").len()
+            + lock_or_recover(&self.vdes, "vdes_history").len()
+            + lock_or_recover(&self.aprs, "aprs_history").len()
+            + lock_or_recover(&self.hf_aprs, "hf_aprs_history").len()
+            + lock_or_recover(&self.cw, "cw_history").len()
+            + lock_or_recover(&self.ft8, "ft8_history").len()
+            + lock_or_recover(&self.ft4, "ft4_history").len()
+            + lock_or_recover(&self.ft2, "ft2_history").len()
+            + lock_or_recover(&self.wspr, "wspr_history").len()
+            + lock_or_recover(&self.lrpt, "lrpt_history").len()
+            + lock_or_recover(&self.wefax, "wefax_history").len();
+        self.total_count.store(total, Ordering::Relaxed);
+    }
+}

src/trx-server/src/history_policy.rs

@@ -0,0 +1,56 @@
+// SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+//
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+//! Shared retention and synchronization policy for decoder histories.
+
+use std::collections::VecDeque;
+use std::sync::{Mutex, MutexGuard};
+use std::time::{Duration, Instant};
+
+pub(crate) const HISTORY_RETENTION: Duration = Duration::from_secs(24 * 60 * 60);
+
+/// Maximum entries per decoder history queue. Oldest entries are evicted on
+/// busy channels independently of time-based pruning.
+pub(crate) const MAX_HISTORY_ENTRIES: usize = 10_000;
+
+pub(crate) fn current_timestamp_ms() -> i64 {
+    std::time::SystemTime::now()
+        .duration_since(std::time::UNIX_EPOCH)
+        .map(|duration| duration.as_millis() as i64)
+        .unwrap_or(0)
+}
+
+pub(crate) fn lock_or_recover<'a, T>(mutex: &'a Mutex<T>, label: &str) -> MutexGuard<'a, T> {
+    mutex.lock().unwrap_or_else(|error| {
+        tracing::warn!(
+            "Mutex for {} was poisoned (prior panic); recovering with potentially inconsistent data",
+            label
+        );
+        error.into_inner()
+    })
+}
+
+pub(crate) fn enforce_capacity<T>(deque: &mut VecDeque<T>, max: usize) {
+    while deque.len() > max {
+        deque.pop_front();
+    }
+}
+
+/// Drop entries older than `retention` from an ordered history queue.
+pub(crate) fn prune_by_age<T>(
+    deque: &mut VecDeque<(Instant, T)>,
+    retention: Duration,
+    now: Instant,
+) {
+    let Some(cutoff) = now.checked_sub(retention) else {
+        return;
+    };
+    while let Some((timestamp, _)) = deque.front() {
+        if *timestamp < cutoff {
+            deque.pop_front();
+        } else {
+            break;
+        }
+    }
+}

src/trx-server/src/main.rs

@@ -4,7 +4,9 @@
 
 mod audio;
 mod config;
+mod decoder_history;
 mod error;
+mod history_policy;
 mod history_store;
 mod listener;
 mod rig_handle;

src/trx-server/trx-backend/trx-backend-soapysdr/src/dsp/filter.rs

@@ -251,9 +251,9 @@ fn mul_freq_domain(buf: &mut [FftComplex<f32>], h_freq: &[FftComplex<f32>], scal
         unsafe {
             mul_freq_domain_neon(buf, h_freq, scale);
         }
-        return;
     }
 
+    #[cfg(not(target_arch = "aarch64"))]
     mul_freq_domain_scalar(buf, h_freq, scale);
 }