[docs](trx-frontend-http): point footer repo link to Gitea

Repoint the web UI footer link to git.haxx.space/sjg/trx-rs, swap the
GitHub octocat mark for a host-neutral git-branch icon, and relabel to
"trx-rs source".

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>

.cargo/config.toml

@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 # Enable CPU optimizations for better performance
 # Set target-cpu to native to use all available CPU features on the build machine
 

.github/workflows/wiki.yml

@@ -1,39 +0,0 @@
-name: Sync docs to Wiki
-
-on:
-  push:
-    branches: [main]
-    paths:
-      - 'docs/**'
-  workflow_dispatch:
-
-permissions:
-  contents: write
-
-jobs:
-  wiki:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-
-      - name: Checkout wiki
-        uses: actions/checkout@v4
-        with:
-          repository: ${{ github.repository }}.wiki
-          path: wiki
-          token: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Sync docs to wiki
-        run: |
-          rsync -av --delete --exclude='.git' docs/ wiki/
-          cd wiki
-          git config user.name "github-actions[bot]"
-          git config user.email "github-actions[bot]@users.noreply.github.com"
-          git add -A
-          if git diff --cached --quiet; then
-            echo "No wiki changes to commit."
-          else
-            git commit -m "Sync docs from ${GITHUB_SHA::8}"
-            git push
-          fi

Cargo.lock

@@ -3178,6 +3178,7 @@ version = "0.1.0"
 dependencies = [
  "actix-web",
  "actix-ws",
+ "base64",
  "brotli 7.0.0",
  "bytes",
  "dirs",
@@ -3261,6 +3262,7 @@ dependencies = [
 name = "trx-server"
 version = "0.1.0"
 dependencies = [
+ "base64",
  "bytes",
  "chrono",
  "clap",

Cargo.lock.license

@@ -1,3 +1,3 @@
 SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 
-SPDX-License-Identifier: BSD-2-Clause
+SPDX-License-Identifier: GPL-2.0-or-later

Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [workspace]
 members = [

FIX_PLAN.md

@@ -1,143 +0,0 @@
-# Fix Plan
-
-Current state analysis of trx-rs as of 2026-04-08.
-
-## Overall Assessment
-
-The codebase is in good shape. Clippy is clean, no `unsafe` code, no TODO/FIXME markers,
-robust error handling throughout. One broken test and several untested crates are the
-main weak spots.
-
----
-
-## P0 — Broken Test
-
-### 1. `test_toggle_ft8_decode` returns 500 instead of 200
-
-**Location:** `src/trx-client/trx-frontend/trx-frontend-http/src/api/mod.rs:1016`
-
-**Root cause:** The handler `toggle_ft8_decode` (decoder.rs:353) requires
-`context: web::Data<Arc<FrontendRuntimeContext>>` for multi-rig state resolution.
-The test registers `state_rx` and `rig_tx` but not `context`, so actix-web returns 500
-(missing app data). A `make_context()` helper already exists at line 757 but is unused
-by this test.
-
-**Fix:** Add `.app_data(web::Data::new(make_context()))` to the test's `App` builder
-(line 1036-1041). ~1 line change.
-
-**Impact:** This is the only failing test in the entire suite (50 pass, 1 fail).
-
----
-
-## P1 — Test Coverage Gaps
-
-### 2. trx-aprs decoder — 0 tests (596 LOC)
-
-**Location:** `src/decoders/trx-aprs/src/lib.rs`
-
-Bell 202 AFSK demodulator + AX.25 HDLC frame parser + CRC-16 validation.
-No `#[cfg(test)]` module at all.
-
-**Suggested tests:**
-- CRC-16 computation on known frames
-- HDLC flag detection and bit-unstuffing
-- Full frame decode from synthetic AFSK audio (1200 baud sine pairs)
-- Rejection of corrupted frames (bad CRC, truncated)
-
-### 3. trx-decode-log — 0 tests (226 LOC)
-
-**Location:** `src/decoders/trx-decode-log/src/lib.rs`
-
-JSON Lines file writer with date-based rotation. Pure I/O wrapper.
-
-**Suggested tests:**
-- Write + read-back round-trip in a tempdir
-- Date rotation triggers new file creation
-- Flush error logging (mock writer)
-
-### 4. trx-reporting — partial tests (1,065 LOC across 2 files)
-
-**Location:** `src/trx-reporting/src/pskreporter.rs` (582 LOC),
-`src/trx-reporting/src/aprsfi.rs` (483 LOC)
-
-Both files have `#[cfg(test)]` modules but coverage is limited to serialization.
-Network behavior (reconnect, rate-limit, batching) is untested.
-
-**Suggested tests:**
-- PSKReporter UDP datagram encoding round-trip
-- APRS-IS login line formatting
-- Spot batching and dedup logic (unit-testable without network)
-
----
-
-## P2 — Code Quality
-
-### 5. `audio.rs` is 4,000 LOC
-
-**Location:** `src/trx-server/src/audio.rs`
-
-Houses all decoder task launchers (FT8, FT4, FT2, APRS, AIS, VDES, CW, WSPR, LRPT,
-WEFAX). Each launcher follows the same pattern. The file is coherent but large.
-
-**Suggested improvement:** Extract decoder launchers into a `decoders/` submodule
-within trx-server, one file per decoder family (e.g., `ftx.rs`, `aprs.rs`, `wefax.rs`).
-Keep the audio pipeline and capture logic in `audio.rs`.
-
-### 6. `scheduler.rs` is 1,585 LOC
-
-**Location:** `src/trx-client/trx-frontend/trx-frontend-http/src/scheduler.rs`
-
-Mixes grayline computation, timespan matching, satellite pass prediction, and the
-scheduler state machine. Well-tested but dense.
-
-**Suggested improvement:** Extract grayline and satellite pass logic into separate
-modules (these are pure functions with no HTTP dependencies).
-
----
-
-## P3 — Minor
-
-### 7. `#[allow(dead_code)]` in soapysdr backend (4 annotations)
-
-**Locations:**
-- `vchan_impl.rs:66,87` — `fixed_slot_count`, `process_pair`
-- `real_iq_source.rs:20` — `device`
-- `demod.rs:113` — lifetime anchor
-
-All documented as intentional (lifetime anchors / reserved capacity). No action needed
-unless the fields can be converted to `PhantomData` or `_`-prefixed without breaking
-semantics.
-
-### 8. FrontendRuntimeContext test helper duplication risk
-
-**Location:** `src/trx-client/trx-frontend/trx-frontend-http/src/api/mod.rs:757`
-
-`make_context()` and `spawn_rig_responder()` are good helpers but only used by some
-tests. As new endpoint tests are added, ensure they consistently use these helpers to
-avoid repeating the `test_toggle_ft8_decode` bug.
-
----
-
-## Implementation Order
-
-```mermaid
-gantt
-    title Fix Plan
-    dateFormat X
-    axisFormat %s
-
-    section P0
-    Fix test_toggle_ft8_decode          :p0, 0, 1
-
-    section P1
-    Add trx-aprs tests                 :p1a, 1, 3
-    Add trx-decode-log tests            :p1b, 1, 2
-    Expand trx-reporting tests          :p1c, 1, 3
-
-    section P2
-    Split audio.rs decoder launchers    :p2a, 3, 5
-    Extract scheduler pure functions    :p2b, 3, 5
-```
-
-P0 is a one-line fix. P1 items are independent and can be parallelized. P2 items are
-refactors that should wait until P1 tests provide regression safety.

LICENSES/GPL-2.0-or-later.txt

@@ -0,0 +1,338 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+
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+ <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
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+
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LICENSES/OFL-1.1.txt

@@ -0,0 +1,43 @@
+SIL OPEN FONT LICENSE
+
+Version 1.1 - 26 February 2007
+
+PREAMBLE
+
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+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font Software shall not be used to promote, endorse or advertise any Modified Version, except to acknowledge the contribution(s) of the Copyright Holder(s) and the Author(s) or with their explicit written permission.
+
+5) The Font Software, modified or unmodified, in part or in whole, must be distributed entirely under this license, and must not be distributed under any other license. The requirement for fonts to remain under this license does not apply to any document created using the Font Software.
+
+TERMINATION
+
+This license becomes null and void if any of the above conditions are not met.
+
+DISCLAIMER
+
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM OTHER DEALINGS IN THE FONT SOFTWARE.

README.md

@@ -5,7 +5,7 @@
 
 A modular amateur radio control stack written in Rust.
 
-[![License](https://img.shields.io/badge/license-BSD--2--Clause-blue.svg)](LICENSES)
+[![License](https://img.shields.io/badge/license-GPL--2.0--or--later-blue.svg)](LICENSES)
 
 </div>
 
@@ -64,9 +64,15 @@ brew install soapysdr
 ```
 </details>
 
-See [Build Requirements](https://github.com/sgrams/trx-rs/wiki/User-Manual#build-requirements)
+See [Build Requirements](https://git.haxx.space/sjg/trx-rs/wiki/User-Manual#build-requirements)
 in the wiki for details on each library.
 
+> **Note:** `cmake` is required even when a system Opus library is installed.
+> The `audiopus_sys` crate probes for Opus via `pkg-config`; if it is not found
+> (or `pkg-config` is unavailable), it falls back to compiling a vendored copy
+> of Opus with CMake. A missing `cmake` therefore fails the build with
+> `is cmake not installed?` rather than a missing-Opus error.
+
 ### 2. Build
 
 ```bash
@@ -127,12 +133,15 @@ a unified set of frontends.
 
 | Resource | Description |
 |----------|-------------|
-| [User Manual](https://github.com/sgrams/trx-rs/wiki/User-Manual) | Configuration, features, and usage |
+| [User Manual](https://git.haxx.space/sjg/trx-rs/wiki/User-Manual) | Configuration, features, and usage |
-| [Architecture](https://github.com/sgrams/trx-rs/wiki/Architecture) | System design, crate layout, data flow, and internals |
+| [Architecture](https://git.haxx.space/sjg/trx-rs/wiki/Architecture) | System design, crate layout, data flow, and internals |
-| [Optimization Guidelines](https://github.com/sgrams/trx-rs/wiki/Optimization-Guidelines) | Performance guidelines for the real-time DSP pipeline |
+| [Optimization Guidelines](https://git.haxx.space/sjg/trx-rs/wiki/Optimization-Guidelines) | Performance guidelines for the real-time DSP pipeline |
-| [Planned Features](https://github.com/sgrams/trx-rs/wiki/Planned-Features) | Roadmap and design notes |
+| [Planned Features](https://git.haxx.space/sjg/trx-rs/wiki/Planned-Features) | Roadmap and design notes |
 | [Contributing](CONTRIBUTING.md) | Commit conventions, workflow, and code style |
 
 ## License
 
-BSD-2-Clause. See [`LICENSES`](LICENSES) for bundled third-party license files.
+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
+the Leaflet AIS tracksymbol plugin under `assets/web/vendor/`) retain their
+original BSD-2-Clause license.

REUSE.toml

@@ -0,0 +1,43 @@
+version = 1
+
+# Project-owned files without an in-file SPDX header (docs, config,
+# repo metadata, logos, and bespoke web assets).
+[[annotations]]
+path = [
+    ".gitattributes",
+    ".gitignore",
+    "CLAUDE.md",
+    "CONTRIBUTING.md",
+    "README.md",
+    "trx-rs.toml.example",
+    "docs/**",
+    "src/decoders/trx-ftx/README.md",
+    "src/decoders/trx-wxsat/README.md",
+    "assets/trx-logo.png",
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/trx-favicon.png",
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/trx-logo.png",
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/web/bandplan.json",
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/web/leaflet-ais-tracksymbol.js",
+]
+SPDX-FileCopyrightText = "2026 Stan Grams <sjg@haxx.space>"
+SPDX-License-Identifier = "GPL-2.0-or-later"
+
+# Vendored Leaflet 1.9.4 (https://leafletjs.com), distributed under BSD-2-Clause.
+[[annotations]]
+path = [
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/web/vendor/leaflet.js",
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/web/vendor/leaflet.css",
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/web/vendor/layers.png",
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/web/vendor/layers-2x.png",
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/web/vendor/marker-icon.png",
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/web/vendor/marker-icon-2x.png",
+    "src/trx-client/trx-frontend/trx-frontend-http/assets/web/vendor/marker-shadow.png",
+]
+SPDX-FileCopyrightText = "2010-2023 Vladimir Agafonkin, 2010-2011 CloudMade"
+SPDX-License-Identifier = "BSD-2-Clause"
+
+# Vendored DSEG14 font (https://github.com/keshikan/DSEG), SIL OFL 1.1.
+[[annotations]]
+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"

docs/RDS-Tuning-Notes.md

@@ -1,9 +1,13 @@
-# RDS Parameter Tuning — Work in Progress
+# RDS Parameter Tuning Notes
+
+*Decoder tuning rationale for `trx-rds`. Recorded 2026-03-27; reflects the
+shipped parameter set. Kept as a reference for why these constants were chosen —
+not an open work item.*
 
 ## Goal
 Maximum sensitivity (weak-signal decode) with zero false positive PI decodes.
 
-## Changes Made
+## Changes Applied
 
 ### `src/decoders/trx-rds/src/lib.rs`
 

script/dummy-server.sh

@@ -1,4 +1,8 @@
 #!/usr/bin/env bash
+# SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 # Run trx-server with the dummy backend for development and testing.
 set -euo pipefail
 

src/decoders/trx-ais/Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-ais"

src/decoders/trx-ais/src/lib.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Basic AIS GMSK/HDLC decoder.
 //!

src/decoders/trx-aprs/Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-aprs"

src/decoders/trx-aprs/src/lib.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Bell 202 AFSK demodulator + AX.25/APRS decoder.
 //!
@@ -686,16 +686,16 @@ mod tests {
             frame.push(ch << 1);
         }
         frame.push(0 << 1); // SSID=0, last=false
-        // Source address (7 bytes)
+                            // Source address (7 bytes)
         let src_bytes = format!("{:<6}", src);
         for &ch in src_bytes.as_bytes().iter().take(6) {
             frame.push(ch << 1);
         }
         frame.push((0 << 1) | 1); // SSID=0, last=true
-        // Control + PID
+                                  // Control + PID
         frame.push(0x03); // UI frame
         frame.push(0xF0); // No layer-3 protocol
-        // Info field
+                          // Info field
         frame.extend_from_slice(info);
         frame
     }

src/decoders/trx-cw/Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-cw"

src/decoders/trx-cw/src/lib.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Goertzel-based CW (Morse code) decoder.
 //!

src/decoders/trx-decode-log/Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-decode-log"

src/decoders/trx-decode-log/src/lib.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Server-side decoder file logging (APRS / CW / FT8 / WSPR).
 //!

src/decoders/trx-ftx/Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-ftx"

src/decoders/trx-ftx/src/common/callsign_hash.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Open-addressing hash table for callsign lookup during FTx decoding.
 //!

src/decoders/trx-ftx/src/common/constants.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 use super::protocol::{FTX_LDPC_K_BYTES, FTX_LDPC_M, FTX_LDPC_N};
 

src/decoders/trx-ftx/src/common/crc.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 use super::protocol::{FT8_CRC_POLYNOMIAL, FT8_CRC_WIDTH};
 

src/decoders/trx-ftx/src/common/decode.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Candidate search, shared decode helpers, and dispatcher functions for FTx decoding.
 //!

src/decoders/trx-ftx/src/common/encode.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Shared LDPC encoding functions used by all FTx protocols.
 

src/decoders/trx-ftx/src/common/ldpc.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Pure Rust LDPC decoder for FTx protocols.
 //!

src/decoders/trx-ftx/src/common/message.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! FTx message pack/unpack logic.
 //!

src/decoders/trx-ftx/src/common/mod.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Common types, constants, and shared functions used across all FTx protocols.
 

src/decoders/trx-ftx/src/common/monitor.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Windowed FFT waterfall/spectrogram engine for FTx decoding.
 //!

src/decoders/trx-ftx/src/common/osd.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! OSD-1/OSD-2 CRC-guided bit-flip decoder for the (174,91) LDPC code.
 //!

src/decoders/trx-ftx/src/common/protocol.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 /// FTx protocol variants.
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]

src/decoders/trx-ftx/src/common/text.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Character table lookup and string utility functions for FTx message
 //! encoding/decoding.

src/decoders/trx-ftx/src/decoder.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Top-level FTx decoder matching the `trx-ft8` public API.
 

src/decoders/trx-ftx/src/ft2/bitmetrics.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Per-symbol FFT and multi-scale bit metrics extraction.
 //!

src/decoders/trx-ftx/src/ft2/decode.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! FT2-specific waterfall sync scoring and likelihood extraction.
 

src/decoders/trx-ftx/src/ft2/downsample.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Frequency-domain downsampling via IFFT.
 //!

src/decoders/trx-ftx/src/ft2/mod.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! FT2 pipeline orchestration.
 //!

src/decoders/trx-ftx/src/ft2/sync.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! 2D sync scoring with complex Costas reference waveforms.
 //!

src/decoders/trx-ftx/src/ft4/mod.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! FT4-specific sync scoring, likelihood extraction, and tone encoding.
 

src/decoders/trx-ftx/src/ft8/mod.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! FT8-specific sync scoring, likelihood extraction, and tone encoding.
 

src/decoders/trx-ftx/src/lib.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 pub mod common;
 mod decoder;

src/decoders/trx-rds/Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-rds"

src/decoders/trx-rds/src/lib.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 use std::f32::consts::{PI, SQRT_2, TAU};
 use std::sync::Arc;

src/decoders/trx-vdes/Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-vdes"

src/decoders/trx-vdes/src/crc.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! CRC-16 for VDES link-layer frames.
 //!

src/decoders/trx-vdes/src/lib.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! VDES 100 kHz decoder for VDE-TER (ITU-R M.2092-1).
 //!

src/decoders/trx-vdes/src/link_layer.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! VDES link-layer frame parsing per ITU-R M.2092-1.
 //!

src/decoders/trx-vdes/src/turbo.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Turbo FEC decoder for VDES TER-MCS-1 (100 kHz channel).
 //!

src/decoders/trx-wefax/Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-wefax"

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

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! WEFAX decoder configuration.
 
@@ -19,9 +19,6 @@ pub struct WefaxConfig {
     pub output_dir: Option<String>,
     /// Whether to emit line-by-line progress events.
     pub emit_progress: bool,
-    /// Whether to continuously track and correct sample-clock drift
-    /// (line-to-line cross-correlation) to remove image slant.
-    pub slant_correction: bool,
 }
 
 impl Default for WefaxConfig {
@@ -33,7 +30,6 @@ impl Default for WefaxConfig {
             deviation_hz: 400.0,
             output_dir: None,
             emit_progress: true,
-            slant_correction: true,
         }
     }
 }

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

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Top-level WEFAX decoder state machine.
 //!
@@ -43,26 +43,11 @@ const LINE_CORR_NOISE_THRESHOLD: f32 = 0.2;
 /// fldigi's line-to-line correlation check for automatic stop.
 const LINE_CORR_NOISE_LINES: u32 = 30;
 
-/// Pearson correlation above which adjacent lines are considered good
-/// evidence of real image content. Used to verify unverified auto-starts.
-const LINE_CORR_IMAGE_THRESHOLD: f32 = 0.5;
-
-/// Number of consecutive well-correlated lines that verify an unverified
-/// reception (i.e. an auto-start from variance detection). Low enough to
-/// engage quickly on real imagery.
-const VERIFY_HIGH_CORR_STREAK: u32 = 5;
-
-/// Maximum number of scan lines the verifier waits for before giving up on
-/// an unverified reception. Roughly 20 s at 120 LPM. If no high-correlation
-/// streak appears by then, the buffered content is dropped and we return
-/// to Idle without saving anything.
-const VERIFY_TIMEOUT_LINES: u32 = 40;
-
 /// Maximum number of scan-line-equivalent sample windows to wait for phasing
-/// lock before falling through to Receiving (unverified). Typical WEFAX
+/// lock before falling through to Receiving. Typical WEFAX phasing lasts
-/// phasing lasts ~30 s; if the phasing detector hasn't converged by then
+/// ~30 s; if the phasing detector hasn't converged by then we give up on
-/// we give up on alignment and let the correlation verifier decide whether
+/// alignment and let the carrier-loss watchdog decide whether the content
-/// the content that follows is a real image. At 120 LPM this is ~30 s.
+/// that follows is real imagery. At 120 LPM this is ~30 s.
 const PHASING_TIMEOUT_LINES: u32 = 60;
 
 /// WEFAX decoder output event.
@@ -117,18 +102,10 @@ pub struct WefaxDecoder {
     /// `LINE_CORR_NOISE_LINES` the decoder auto-finalizes the in-progress
     /// image (carrier dropped / tx ended without an APT stop tone).
     low_corr_lines: u32,
-    /// `true` once the current reception has been confirmed to contain real
-    /// image content. Set immediately for phasing-driven entries (the APT
-    /// start tone + phasing pulses already proved the signal); set later
-    /// by the correlation verifier for variance-driven auto-starts.
-    verified: bool,
-    /// Rolling count of consecutive well-correlated lines, used to confirm
-    /// an unverified reception.
-    high_corr_streak: u32,
     /// Number of luminance samples processed while in `State::Phasing`.
     /// When this exceeds the equivalent of `PHASING_TIMEOUT_LINES` lines,
-    /// the decoder falls through to Receiving (unverified) so a noisy or
+    /// the decoder falls through to Receiving so a noisy or partial
-    /// partial phasing signal doesn't wedge the state machine.
+    /// phasing signal doesn't wedge the state machine.
     phasing_samples: u64,
     /// Current rig dial frequency in Hz (for image filenames).
     freq_hz: u64,
@@ -157,8 +134,6 @@ impl WefaxDecoder {
             signal_detect_count: 0,
             signal_detect_buf: Vec::with_capacity(INTERNAL_RATE as usize / 2),
             low_corr_lines: 0,
-            verified: false,
-            high_corr_streak: 0,
             phasing_samples: 0,
             freq_hz: 0,
             mode: String::new(),
@@ -267,7 +242,7 @@ impl WefaxDecoder {
                                     .as_millis() as i64,
                             );
                             self.signal_detect_buf.clear();
-                            events.push(self.transition_to_receiving(ioc, lpm, 0, false));
+                            events.push(self.transition_to_receiving(ioc, lpm, 0));
                             break;
                         }
 
@@ -297,12 +272,12 @@ impl WefaxDecoder {
 
                 if let Some(ref mut phasing) = self.phasing {
                     if let Some(offset) = phasing.process(&luminance) {
-                        events.push(self.transition_to_receiving(ioc, lpm, offset, true));
+                        events.push(self.transition_to_receiving(ioc, lpm, offset));
                     } else {
                         // Phasing timeout: if alignment doesn't converge in
                         // ~PHASING_TIMEOUT_LINES lines, fall through to
-                        // Receiving (unverified) and let the correlation
+                        // Receiving and let the carrier-loss watchdog decide
-                        // verifier decide.
+                        // whether the content that follows is real imagery.
                         self.phasing_samples += luminance.len() as u64;
                         let spl = WefaxConfig::samples_per_line(lpm, INTERNAL_RATE) as u64;
                         if self.phasing_samples >= spl * PHASING_TIMEOUT_LINES as u64 {
@@ -310,7 +285,7 @@ impl WefaxDecoder {
                                 ioc,
                                 lpm, "WEFAX: phasing timeout — falling through to receiving"
                             );
-                            events.push(self.transition_to_receiving(ioc, lpm, 0, false));
+                            events.push(self.transition_to_receiving(ioc, lpm, 0));
                         }
                     }
                 }
@@ -327,66 +302,36 @@ impl WefaxDecoder {
 
                 // Feed luminance to line slicer.
                 let mut carrier_lost = false;
-                let mut verify_failed = false;
                 if let Some(ref mut slicer) = self.slicer {
                     let new_lines = slicer.process(&luminance);
                     for line in new_lines {
                         if let Some(ref mut image) = self.image {
-                            // Line-to-line Pearson correlation classifies the
+                            // Carrier-loss watchdog: real imagery has highly
-                            // new line as image-like, noise-like, or flat.
+                            // correlated adjacent lines; pure noise does not.
-                            // fldigi-style: real imagery has highly correlated
+                            // After LINE_CORR_NOISE_LINES consecutive low-
-                            // adjacent lines; pure noise does not.
+                            // correlation lines we finalize (fldigi-style
+                            // automatic stop).
                             if let Some(r) = image.correlation_with_last(&line) {
-                                if r >= LINE_CORR_IMAGE_THRESHOLD {
+                                if r < LINE_CORR_NOISE_THRESHOLD {
-                                    self.high_corr_streak += 1;
-                                    self.low_corr_lines = 0;
-                                    if !self.verified
-                                        && self.high_corr_streak >= VERIFY_HIGH_CORR_STREAK
-                                    {
-                                        self.verified = true;
-                                        debug!(
-                                            lines = image.line_count(),
-                                            "WEFAX: reception verified from line correlation"
-                                        );
-                                    }
-                                } else if r < LINE_CORR_NOISE_THRESHOLD {
                                     self.low_corr_lines += 1;
-                                    self.high_corr_streak = 0;
                                     trace!(
                                         r = format!("{:.3}", r),
                                         count = self.low_corr_lines,
                                         "WEFAX low line-correlation"
                                     );
                                 } else {
-                                    // Middle zone — reset high streak, hold
+                                    self.low_corr_lines = 0;
-                                    // low-corr counter.
-                                    self.high_corr_streak = 0;
                                 }
                             }
                             // Flat lines (correlation == None) don't advance
-                            // either counter — solid bands in real imagery
+                            // the counter but also don't reset it — an image
-                            // shouldn't be scored as noise OR as evidence.
+                            // with a solid band surrounded by noise still
+                            // trips the watchdog once the noise resumes.
 
                             image.push_line(line);
                             let count = image.line_count();
 
-                            // Unverified timeout: if we got here from a
+                            if self.low_corr_lines >= LINE_CORR_NOISE_LINES {
-                            // variance auto-start and line correlation never
-                            // took hold, the "signal" wasn't real WEFAX.
-                            // Abandon without saving.
-                            if !self.verified && count >= VERIFY_TIMEOUT_LINES {
-                                debug!(
-                                    lines = count,
-                                    "WEFAX: failed to verify image content — abandoning"
-                                );
-                                verify_failed = true;
-                                break;
-                            }
-
-                            // Carrier-loss watchdog — only active once the
-                            // reception has been verified (otherwise it
-                            // double-counts with the verify timeout).
-                            if self.verified && self.low_corr_lines >= LINE_CORR_NOISE_LINES {
                                 debug!(
                                     lines = count,
                                     "WEFAX: line correlation lost — auto-finalizing image"
@@ -418,15 +363,6 @@ impl WefaxDecoder {
                     }
                 }
 
-                if verify_failed {
-                    // Drop buffered content without saving — this was a
-                    // false auto-start (tone, noise burst, etc.).
-                    self.image = None;
-                    self.reception_start_ms = None;
-                    self.transition_to_idle();
-                    return events;
-                }
-
                 if carrier_lost {
                     events.extend(self.finalize_image(ioc, lpm));
                     self.transition_to_idle();
@@ -465,8 +401,6 @@ impl WefaxDecoder {
         self.signal_detect_count = 0;
         self.signal_detect_buf.clear();
         self.low_corr_lines = 0;
-        self.verified = false;
-        self.high_corr_streak = 0;
         self.phasing_samples = 0;
         events
     }
@@ -522,30 +456,13 @@ impl WefaxDecoder {
         self.state_event("Phasing", ioc, lpm)
     }
 
-    fn transition_to_receiving(
+    fn transition_to_receiving(&mut self, ioc: u16, lpm: u16, phase_offset: usize) -> WefaxEvent {
-        &mut self,
+        debug!(ioc, lpm, phase_offset, "WEFAX: entering receiving");
-        ioc: u16,
-        lpm: u16,
-        phase_offset: usize,
-        verified: bool,
-    ) -> WefaxEvent {
-        debug!(
-            ioc,
-            lpm, phase_offset, verified, "WEFAX: entering receiving"
-        );
         let ppl = WefaxConfig::pixels_per_line(ioc) as usize;
-        self.slicer = Some(LineSlicer::with_slant(
+        self.slicer = Some(LineSlicer::new(lpm, ioc, INTERNAL_RATE, phase_offset));
-            lpm,
-            ioc,
-            INTERNAL_RATE,
-            phase_offset,
-            self.config.slant_correction,
-        ));
         self.image = Some(ImageAssembler::new(ppl));
         self.tone_detector.reset();
         self.low_corr_lines = 0;
-        self.verified = verified;
-        self.high_corr_streak = 0;
         self.state = State::Receiving { ioc, lpm };
         self.state_event("Receiving", ioc, lpm)
     }
@@ -559,8 +476,6 @@ impl WefaxDecoder {
         self.signal_detect_count = 0;
         self.signal_detect_buf.clear();
         self.low_corr_lines = 0;
-        self.verified = false;
-        self.high_corr_streak = 0;
         self.phasing_samples = 0;
     }
 
@@ -574,12 +489,23 @@ impl WefaxDecoder {
 
             let ppl = WefaxConfig::pixels_per_line(ioc);
             let mut path_str = None;
+            let mut png_data = None;
 
             // Save PNG if output directory is configured.
             if let Some(ref dir) = self.config.output_dir {
                 let output_path = PathBuf::from(dir);
                 match image.save_png(&output_path, self.freq_hz, &self.mode) {
                     Ok(p) => {
+                        // Read back the PNG bytes for remote client transfer.
+                        match std::fs::read(&p) {
+                            Ok(bytes) => {
+                                png_data =
+                                    Some(base64::engine::general_purpose::STANDARD.encode(&bytes));
+                            }
+                            Err(e) => {
+                                eprintln!("WEFAX: failed to read PNG for transfer: {}", e);
+                            }
+                        }
                         path_str = Some(p.to_string_lossy().into_owned());
                     }
                     Err(e) => {
@@ -597,6 +523,7 @@ impl WefaxDecoder {
                 ioc,
                 pixels_per_line: ppl,
                 path: path_str,
+                png_data,
                 complete: true,
             }));
         }

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

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! FM discriminator for WEFAX demodulation.
 //!

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

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Image buffer and PNG encoding for WEFAX decoded images.
 
@@ -144,9 +144,15 @@ impl ImageAssembler {
         }
         debug_assert_eq!(img_data.len(), expected_bytes);
 
-        writer
+        writer.write_image_data(&img_data).map_err(|e| {
-            .write_image_data(&img_data)
+            format!(
-            .map_err(|e| format!("write PNG data ({} bytes, {}x{}): {}", img_data.len(), width, height, e))?;
+                "write PNG data ({} bytes, {}x{}): {}",
+                img_data.len(),
+                width,
+                height,
+                e
+            )
+        })?;
 
         // Explicitly finish the writer (writes IEND). Relying on Drop
         // alone swallows any I/O error and can yield a truncated file.

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

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! WEFAX (Weather Facsimile) decoder.
 //!

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

@@ -1,27 +1,15 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Line slicer: pixel clock recovery and line buffer assembly.
 //!
 //! Once the phasing detector has established a line-start phase offset,
 //! the line slicer accumulates demodulated luminance samples and extracts
 //! complete image lines at the configured LPM rate.
-//!
-//! When `slant_correction` is enabled, the slicer tracks line-to-line
-//! drift via cross-correlation with the previous line and nudges the
-//! extraction cursor by ±`MAX_DRIFT_SAMPLES` per line. This compensates
-//! for the small mismatch between the transmitter's and receiver's
-//! sample clocks that would otherwise skew the assembled image.
 
 use crate::config::WefaxConfig;
 
-/// Maximum per-line drift (in samples at the internal rate) searched for
-/// when slant correction is enabled. At 120 LPM / 11025 Hz there are
-/// ~5512 samples per line, so ±6 samples is ~0.1% drift per line — more
-/// than enough for any real-world sample-clock mismatch.
-const MAX_DRIFT_SAMPLES: usize = 6;
-
 /// Line slicer for WEFAX image assembly.
 pub struct LineSlicer {
     /// Samples per line at the internal sample rate.
@@ -30,34 +18,14 @@ pub struct LineSlicer {
     pixels_per_line: usize,
     /// Phase offset in samples from the phasing detector.
     phase_offset: usize,
-    /// Accumulated luminance samples. While `slant_correction` is on,
+    /// Accumulated luminance samples.
-    /// the buffer anchor is the *start of the previous line* (so the
-    /// first `samples_per_line` samples are the reference for drift
-    /// tracking). Without slant correction the anchor is simply the
-    /// start of the next line to extract.
     buffer: Vec<f32>,
     /// Whether we have aligned to the phase offset yet.
     aligned: bool,
-    /// Whether a reference (previous) line is held at the buffer anchor.
-    has_reference: bool,
-    /// Enable line-to-line drift tracking.
-    slant_correction: bool,
-    /// Cumulative drift applied so far (samples). Diagnostic.
-    pub(crate) total_drift: i64,
 }
 
 impl LineSlicer {
     pub fn new(lpm: u16, ioc: u16, sample_rate: u32, phase_offset: usize) -> Self {
-        Self::with_slant(lpm, ioc, sample_rate, phase_offset, true)
-    }
-
-    pub fn with_slant(
-        lpm: u16,
-        ioc: u16,
-        sample_rate: u32,
-        phase_offset: usize,
-        slant_correction: bool,
-    ) -> Self {
         let samples_per_line = WefaxConfig::samples_per_line(lpm, sample_rate);
         let pixels_per_line = WefaxConfig::pixels_per_line(ioc) as usize;
 
@@ -65,11 +33,8 @@ impl LineSlicer {
             samples_per_line,
             pixels_per_line,
             phase_offset,
-            buffer: Vec::with_capacity(samples_per_line * 3),
+            buffer: Vec::with_capacity(samples_per_line * 2),
             aligned: false,
-            has_reference: false,
-            slant_correction,
-            total_drift: 0,
         }
     }
 
@@ -90,57 +55,16 @@ impl LineSlicer {
             self.aligned = true;
         }
 
-        let spl = self.samples_per_line;
+        // Extract complete lines (single drain at the end to avoid O(n²)).
-
+        let mut offset = 0;
-        if !self.slant_correction {
+        while offset + self.samples_per_line <= self.buffer.len() {
-            // Simple fixed-period extraction.
+            let line_samples = &self.buffer[offset..offset + self.samples_per_line];
-            let mut offset = 0;
+            let pixels = self.resample_line(line_samples);
-            while offset + spl <= self.buffer.len() {
-                let line_samples = &self.buffer[offset..offset + spl];
-                let pixels = self.resample_line(line_samples);
-                lines.push(pixels);
-                offset += spl;
-            }
-            if offset > 0 {
-                self.buffer.drain(..offset);
-            }
-            return lines;
-        }
-
-        // Slant-corrected extraction.
-        let max_shift = MAX_DRIFT_SAMPLES;
-
-        // Bootstrap: the very first line has no previous reference.
-        // Extract it naively and keep it in the buffer as the reference.
-        if !self.has_reference {
-            if self.buffer.len() < spl {
-                return lines;
-            }
-            let first = self.buffer[0..spl].to_vec();
-            let pixels = self.resample_line(&first);
             lines.push(pixels);
-            self.has_reference = true;
+            offset += self.samples_per_line;
-            // Do NOT drain: the first `spl` samples remain as the
-            // reference for the next line's drift search.
         }
-
+        if offset > 0 {
-        // Subsequent lines: for each iteration, buffer[0..spl] is the
+            self.buffer.drain(..offset);
-        // reference line, and we search for the best starting position
-        // of the NEXT line in the range [spl - max_shift, spl + max_shift].
-        while self.buffer.len() >= 2 * spl + max_shift {
-            let prev = &self.buffer[0..spl];
-            let (best_d, _best_r) =
-                search_best_shift(prev, &self.buffer, spl, max_shift);
-
-            let start = (spl as i32 + best_d) as usize;
-            let next_line = self.buffer[start..start + spl].to_vec();
-            let pixels = self.resample_line(&next_line);
-            lines.push(pixels);
-
-            // Advance the anchor to the start of the line we just
-            // emitted — it becomes the reference for the next iteration.
-            self.buffer.drain(..start);
-            self.total_drift += best_d as i64;
         }
 
         lines
@@ -150,16 +74,9 @@ impl LineSlicer {
         self.pixels_per_line
     }
 
-    /// Samples per line at the internal rate (for diagnostics).
-    pub fn samples_per_line(&self) -> usize {
-        self.samples_per_line
-    }
-
     pub fn reset(&mut self) {
         self.buffer.clear();
         self.aligned = false;
-        self.has_reference = false;
-        self.total_drift = 0;
     }
 
     /// Resample a line's worth of luminance samples to the target pixel count
@@ -190,82 +107,6 @@ impl LineSlicer {
     }
 }
 
-/// Search for the drift `d ∈ [-max_shift, +max_shift]` that maximises
-/// the Pearson correlation between `reference` and
-/// `buffer[spl+d .. spl+d+spl]`.
-///
-/// Returns `(best_d, best_r)`. A correlation-peak deadband prefers
-/// `d = 0` when the peak is only marginally better than at zero, which
-/// keeps tracking stable on quiet lines.
-fn search_best_shift(
-    reference: &[f32],
-    buffer: &[f32],
-    spl: usize,
-    max_shift: usize,
-) -> (i32, f32) {
-    debug_assert!(buffer.len() >= 2 * spl + max_shift);
-    debug_assert_eq!(reference.len(), spl);
-
-    // Pre-compute reference mean + variance.
-    let n = spl as f32;
-    let mean_r = reference.iter().sum::<f32>() / n;
-    let mut var_r = 0.0f32;
-    for &v in reference {
-        let d = v - mean_r;
-        var_r += d * d;
-    }
-
-    // Guard against a flat reference line — drift tracking is useless.
-    const MIN_VAR: f32 = 32.0;
-    if var_r < MIN_VAR {
-        return (0, 0.0);
-    }
-
-    let ms = max_shift as i32;
-    let mut best_d = 0i32;
-    let mut best_r = f32::NEG_INFINITY;
-    let mut r_at_zero = 0.0f32;
-
-    for d in -ms..=ms {
-        let start = (spl as i32 + d) as usize;
-        let candidate = &buffer[start..start + spl];
-
-        let mean_c = candidate.iter().sum::<f32>() / n;
-        let mut var_c = 0.0f32;
-        let mut cov = 0.0f32;
-        for (i, &v) in candidate.iter().enumerate() {
-            let dr = reference[i] - mean_r;
-            let dc = v - mean_c;
-            cov += dr * dc;
-            var_c += dc * dc;
-        }
-
-        let r = if var_c < MIN_VAR {
-            // Skip flat candidate slices.
-            f32::NEG_INFINITY
-        } else {
-            cov / (var_r.sqrt() * var_c.sqrt())
-        };
-
-        if d == 0 {
-            r_at_zero = r;
-        }
-        if r > best_r {
-            best_r = r;
-            best_d = d;
-        }
-    }
-
-    // Deadband: if the peak is only marginally better than `d = 0`,
-    // stick with zero. This avoids per-line jitter when drift is small.
-    const DEADBAND: f32 = 0.01;
-    if r_at_zero.is_finite() && best_r - r_at_zero < DEADBAND {
-        return (0, r_at_zero);
-    }
-
-    (best_d, best_r)
-}
-
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -278,8 +119,7 @@ mod tests {
         let spl = WefaxConfig::samples_per_line(lpm, sr);
         let ppl = WefaxConfig::pixels_per_line(ioc) as usize;
 
-        // Slant correction off for deterministic line count.
+        let mut slicer = LineSlicer::new(lpm, ioc, sr, 0);
-        let mut slicer = LineSlicer::with_slant(lpm, ioc, sr, 0, false);
         // Feed exactly 3 lines worth of white.
         let samples = vec![1.0f32; spl * 3];
         let lines = slicer.process(&samples);
@@ -296,7 +136,7 @@ mod tests {
         let sr = 11025;
         let spl = WefaxConfig::samples_per_line(lpm, sr);
 
-        let mut slicer = LineSlicer::with_slant(lpm, ioc, sr, 0, false);
+        let mut slicer = LineSlicer::new(lpm, ioc, sr, 0);
         // Feed a linear ramp from 0.0 to 1.0.
         let samples: Vec<f32> = (0..spl).map(|i| i as f32 / spl as f32).collect();
         let lines = slicer.process(&samples);
@@ -305,92 +145,4 @@ mod tests {
         assert!(lines[0][0] < 5);
         assert!(lines[0].last().copied().unwrap_or(0) > 250);
     }
-
-    /// Synthesise a noisy-ish gradient line that repeats with a small
-    /// per-line offset, simulating a sample-clock mismatch. The slant
-    /// tracker should follow the drift.
-    #[test]
-    fn slant_tracker_follows_drift() {
-        let lpm = 120;
-        let ioc = 576;
-        let sr = 11025;
-        let spl = WefaxConfig::samples_per_line(lpm, sr);
-
-        // Build a signal where each real line is `spl + 3` samples long
-        // (i.e. transmitter clock is slower than expected → positive drift
-        // of +3 samples per line). The content needs high-frequency
-        // structure for a few-sample shift to be detectable against the
-        // deadband.
-        let true_line_len = spl + 3;
-        let mut signal: Vec<f32> = Vec::new();
-        let base: Vec<f32> = (0..true_line_len)
-            .map(|i| {
-                // Pseudo-random-but-repeatable content with a narrow
-                // bright stripe — sharp features make sub-line shifts
-                // easy to localise.
-                let x = ((i as u32).wrapping_mul(2654435761)) >> 16;
-                let noise = (x & 0xff) as f32 / 255.0;
-                let stripe = if i == true_line_len / 3 { 1.0 } else { 0.0 };
-                0.3 + 0.4 * noise + stripe
-            })
-            .collect();
-        // 20 lines, each identical.
-        for _ in 0..20 {
-            signal.extend_from_slice(&base);
-        }
-
-        let mut slicer = LineSlicer::with_slant(lpm, ioc, sr, 0, true);
-        let lines = slicer.process(&signal);
-
-        // Expect ~ (20*true_line_len - spl) / (spl+drift) lines with
-        // drift absorbing the extra 2 samples per line.
-        assert!(
-            lines.len() >= 15,
-            "slant-corrected slicer produced only {} lines",
-            lines.len()
-        );
-        // Should have tracked positive drift.
-        assert!(
-            slicer.total_drift > 0,
-            "expected positive drift, got {}",
-            slicer.total_drift
-        );
-        // Roughly +3 per line (after the first bootstrap line); allow wide tolerance.
-        let per_line = slicer.total_drift as f32 / (lines.len() - 1) as f32;
-        assert!(
-            per_line > 1.5 && per_line < 4.0,
-            "per-line drift {:.2} out of range (total {}, lines {})",
-            per_line,
-            slicer.total_drift,
-            lines.len()
-        );
-    }
-
-    #[test]
-    fn slant_tracker_deadband_on_no_drift() {
-        let lpm = 120;
-        let ioc = 576;
-        let sr = 11025;
-        let spl = WefaxConfig::samples_per_line(lpm, sr);
-
-        // Perfectly aligned lines → drift should stay at zero.
-        let line: Vec<f32> = (0..spl)
-            .map(|i| {
-                let t = i as f32 / spl as f32;
-                0.5 + 0.4 * (t * 9.0 * std::f32::consts::PI).sin()
-            })
-            .collect();
-        let mut signal = Vec::new();
-        for _ in 0..10 {
-            signal.extend_from_slice(&line);
-        }
-
-        let mut slicer = LineSlicer::with_slant(lpm, ioc, sr, 0, true);
-        let _ = slicer.process(&signal);
-        // Deadband should keep drift at 0.
-        assert_eq!(
-            slicer.total_drift, 0,
-            "no drift expected for identical lines"
-        );
-    }
 }

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

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Phasing signal detector and line-start alignment for WEFAX.
 //!

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

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Polyphase rational resampler: 48000 Hz → 11025 Hz.
 //!

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

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! APT tone detector for WEFAX start/stop signals.
 //!

src/decoders/trx-wspr/Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-wspr"

src/decoders/trx-wspr/src/decoder.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 use crate::protocol;
 

src/decoders/trx-wspr/src/lib.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 mod decoder;
 mod protocol;

src/decoders/trx-wspr/src/protocol.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 /// Decoded WSPR message payload.
 #[derive(Debug, Clone)]

src/decoders/trx-wxsat/Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-wxsat"

src/decoders/trx-wxsat/src/image_enc.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Shared PNG image encoding for weather satellite decoders.
 //!

src/decoders/trx-wxsat/src/lib.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Weather satellite image decoders.
 //!

src/decoders/trx-wxsat/src/lrpt/cadu.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! CCSDS CADU (Channel Access Data Unit) frame synchronisation and extraction.
 //!

src/decoders/trx-wxsat/src/lrpt/demod.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! QPSK demodulator for Meteor-M LRPT.
 //!

src/decoders/trx-wxsat/src/lrpt/mcu.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! MCU (Minimum Coded Unit) assembly and multi-channel image composition.
 //!

src/decoders/trx-wxsat/src/lrpt/mod.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Meteor-M LRPT (Low Rate Picture Transmission) satellite image decoder.
 //!

src/trx-app/Cargo.toml

@@ -1,12 +1,12 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-app"
 version.workspace = true
 edition = "2021"
-license = "BSD-2-Clause"
+license = "GPL-2.0-or-later"
 
 [dependencies]
 serde = { workspace = true }

src/trx-app/src/config.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 use serde::de::DeserializeOwned;
 use std::path::{Path, PathBuf};

src/trx-app/src/lib.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 pub mod config;
 pub mod logging;

src/trx-app/src/logging.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 use tracing::Level;
 use tracing_subscriber::FmtSubscriber;

src/trx-app/src/shared_config.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Shared configuration validation helpers used by both `trx-server` and
 //! `trx-client`.

src/trx-app/src/util.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 /// Normalize a name to lowercase alphanumeric.
 pub fn normalize_name(name: &str) -> String {

src/trx-client/Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-client"

src/trx-client/src/audio_bridge.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Local audio bridge for trx-client.
 //!

src/trx-client/src/audio_client.rs

@@ -1,13 +1,13 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Audio TCP client that connects to the server's audio port and relays
 //! RX/TX Opus frames via broadcast/mpsc channels.
 
 use std::collections::{HashMap, HashSet};
 use std::sync::{Arc, Mutex, RwLock};
-use std::time::Duration;
+use std::time::{Duration, Instant};
 
 use bytes::Bytes;
 use flate2::read::GzDecoder;
@@ -36,6 +36,13 @@ use trx_core::audio::{
 use trx_core::decode::DecodedMessage;
 use trx_frontend::VChanAudioCmd;
 
+/// Minimum uptime before a connection is "stable" enough to reset the
+/// reconnect backoff.  Connections that die before this threshold leave the
+/// exponential backoff climbing — protects the server from a tight reconnect
+/// storm when the peer is broken in some way that only manifests after the
+/// TCP handshake.
+const STABLE_CONNECTION_THRESHOLD: Duration = Duration::from_secs(30);
+
 #[derive(Clone, Debug)]
 struct ActiveVChanSub {
     freq_hz: u64,
@@ -289,7 +296,7 @@ async fn run_single_rig_audio_client(
         info!("Audio client [{}]: connecting to {}", rig_id, server_addr);
         match TcpStream::connect(&server_addr).await {
             Ok(stream) => {
-                reconnect_delay = Duration::from_secs(1);
+                let connected_at = Instant::now();
                 if let Err(e) = handle_single_rig_connection(
                     stream,
                     &rig_id,
@@ -311,6 +318,13 @@ async fn run_single_rig_audio_client(
                 {
                     warn!("Audio connection [{}] dropped: {}", rig_id, e);
                 }
+                // Only reset the backoff after a connection survived long
+                // enough to be considered stable.  TCP `connect()` succeeding
+                // is not enough — a peer that fails immediately after
+                // accepting must not be hammered every second.
+                if connected_at.elapsed() >= STABLE_CONNECTION_THRESHOLD {
+                    reconnect_delay = Duration::from_secs(1);
+                }
             }
             Err(e) => {
                 warn!("Audio connect [{}] failed: {}", rig_id, e);
@@ -586,7 +600,10 @@ async fn handle_single_rig_connection(
                         rig_id_for_rx, msg_type
                     );
                 }
-                Err(_) => break,
+                Err(e) => {
+                    warn!("Audio client [{}]: read error: {}", rig_id_for_rx, e);
+                    break;
+                }
             }
         }
     });

src/trx-client/src/config.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 //! Configuration file support for trx-client.
 //!

src/trx-client/src/main.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 mod audio_bridge;
 mod audio_client;

src/trx-client/src/remote_client.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 use std::collections::HashMap;
 use std::sync::atomic::{AtomicBool, Ordering};
@@ -95,8 +95,7 @@ pub async fn run_remote_client(
     // soon as short names are discovered.  Runs independently so the meter
     // bar in the UI updates at the full server-side 30 Hz without being
     // gated on state polls or user commands.
-    let meter_supervisor =
+    let meter_supervisor = tokio::spawn(run_meter_supervisor(config.clone(), shutdown_rx.clone()));
-        tokio::spawn(run_meter_supervisor(config.clone(), shutdown_rx.clone()));
 
     let mut reconnect_delay = Duration::from_secs(1);
 
@@ -228,10 +227,7 @@ async fn run_spectrum_connection(
 /// one dedicated TCP connection per rig that streams `MeterUpdate` JSON lines
 /// (see `trx_protocol::MeterUpdate`).  Each per-rig task owns its own watch
 /// sender in `config.rig_meters` and reconnects on failure.
-async fn run_meter_supervisor(
+async fn run_meter_supervisor(config: RemoteClientConfig, mut shutdown_rx: watch::Receiver<bool>) {
-    config: RemoteClientConfig,
-    mut shutdown_rx: watch::Receiver<bool>,
-) {
     let mut tasks: HashMap<String, tokio::task::JoinHandle<()>> = HashMap::new();
     let mut poll = time::interval(Duration::from_millis(500));
 
@@ -345,7 +341,11 @@ async fn stream_meter(
     let (reader, mut writer) = stream.into_split();
     let mut reader = BufReader::new(reader);
 
-    let envelope = build_envelope(config, ClientCommand::SubscribeMeter, Some(short_name.to_string()));
+    let envelope = build_envelope(
+        config,
+        ClientCommand::SubscribeMeter,
+        Some(short_name.to_string()),
+    );
     let mut payload = serde_json::to_string(&envelope)
         .map_err(|e| RigError::communication(format!("JSON serialize failed: {e}")))?;
     payload.push('\n');

src/trx-client/trx-frontend/Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-frontend"

src/trx-client/trx-frontend/src/lib.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 use std::collections::{HashMap, HashSet, VecDeque};
 use std::net::SocketAddr;

src/trx-client/trx-frontend/trx-frontend-http-json/Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-frontend-http-json"

src/trx-client/trx-frontend/trx-frontend-http-json/src/lib.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 pub mod server;
 

src/trx-client/trx-frontend/trx-frontend-http-json/src/server.rs

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 use std::net::SocketAddr;
 use std::sync::Arc;

src/trx-client/trx-frontend/trx-frontend-http/Cargo.toml

@@ -1,6 +1,6 @@
 # SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 #
-# SPDX-License-Identifier: BSD-2-Clause
+# SPDX-License-Identifier: GPL-2.0-or-later
 
 [package]
 name = "trx-frontend-http"
@@ -16,6 +16,7 @@ tokio = { workspace = true, features = ["full"] }
 serde = { workspace = true, features = ["derive"] }
 serde_json = { workspace = true }
 tracing = { workspace = true }
+base64 = "0.22"
 actix-web = "4.4"
 actix-ws = "0.3"
 tokio-stream = { version = "0.1", features = ["sync"] }

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

@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+//
+// SPDX-License-Identifier: GPL-2.0-or-later
+
 // --- Decoder registry (fetched from /decoders on load) ---
 /** @type {Array<{id:string,label:string,activation:string,active_modes:string[],background_decode:boolean,bookmark_selectable:boolean}>} */
 let decoderRegistry = [];
@@ -4485,7 +4489,16 @@ function _initMapWhenReady() {
     if (loadingEl) loadingEl.classList.add("is-hidden");
     window.trx.map.initAprsMap();
     window.trx.map.sizeAprsMapToViewport();
-    if (window.trx.map.aprsMap) setTimeout(() => window.trx.map.aprsMap.invalidateSize(), 50);
+    // 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();
+        if (window.trx.map.aprsMap) window.trx.map.aprsMap.invalidateSize();
+      });
+    });
     return;
   }
   // Not ready yet — show overlay and poll until both are available.
@@ -7006,9 +7019,18 @@ function stopSpectrumStreaming() {
 
 // ── /meter (fast signal-strength) streaming ─────────────────────────────────
 // Dedicated SSE channel pushed at ~30 Hz by trx-server; bypasses /events so
-// meter frames are never gated by full-RigState diffing. Synchronous DOM
+// meter frames are never gated by full-RigState diffing.
-// write per frame — no rAF coalescing, per user requirement that it "feel
+//
-// instant" on the frontend.
+// Client-side asymmetric EMA smoothing (GQRX-style ballistics):
+//   attack τ ≈ 400 ms  — rises in ~12 frames at 30 Hz
+//   decay  τ ≈ 1.0 s   — falls in ~30 frames, readable
+// DOM updates are coalesced via requestAnimationFrame so the bar
+// animates at display refresh rate, not SSE rate.
+const METER_ATTACK_ALPHA = 0.08; // per-frame at ~30 Hz ≈ 400 ms τ
+const METER_DECAY_ALPHA  = 0.03; // per-frame at ~30 Hz ≈ 1.0 s τ
+let meterSmoothedDbm = null;
+let meterRafPending = false;
+
 function scheduleMeterReconnect() {
   if (meterReconnectTimer !== null) return;
   meterReconnectTimer = setTimeout(() => {
@@ -7019,6 +7041,24 @@ function scheduleMeterReconnect() {
 
 function applyMeterSample(dbm) {
   if (typeof dbm !== "number" || !Number.isFinite(dbm)) return;
+  // Asymmetric EMA: fast attack, slow decay.
+  if (meterSmoothedDbm === null) {
+    meterSmoothedDbm = dbm;
+  } else {
+    const alpha = dbm > meterSmoothedDbm ? METER_ATTACK_ALPHA : METER_DECAY_ALPHA;
+    meterSmoothedDbm += alpha * (dbm - meterSmoothedDbm);
+  }
+  // Coalesce DOM writes to display refresh rate.
+  if (!meterRafPending) {
+    meterRafPending = true;
+    requestAnimationFrame(flushMeterDom);
+  }
+}
+
+function flushMeterDom() {
+  meterRafPending = false;
+  const dbm = meterSmoothedDbm;
+  if (dbm === null) return;
   prevRenderData.sigDbm = dbm;
   const sUnits = dbmToSUnits(dbm);
   sigLastSUnits = sUnits;
@@ -7059,6 +7099,7 @@ function stopMeterStreaming() {
     clearTimeout(meterReconnectTimer);
     meterReconnectTimer = null;
   }
+  meterSmoothedDbm = null; // reset so next rig starts fresh
 }
 
 // ── Rendering ────────────────────────────────────────────────────────────────

src/trx-client/trx-frontend/trx-frontend-http/assets/web/decode-history-worker.js

@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+//
+// SPDX-License-Identifier: GPL-2.0-or-later
+
 const textDecoder = typeof TextDecoder === "function" ? new TextDecoder() : null;
 const HISTORY_GROUP_KEYS = ["ais", "vdes", "aprs", "hf_aprs", "cw", "ft8", "ft4", "ft2", "wspr", "wefax"];
 

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

@@ -1,4 +1,9 @@
 <!DOCTYPE html>
+<!--
+SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+
+SPDX-License-Identifier: GPL-2.0-or-later
+-->
 <html lang="en">
 <head>
   <meta charset="utf-8">
@@ -1576,7 +1581,7 @@
     </div>
     <div class="footer">
       <div class="copyright">
-        Built by <a href="https://www.qrzcq.com/call/SP2SJG" target="_blank" rel="noopener">SP2SJG</a> from <a href="https://haxx.space" target="_blank" rel="noopener">haxx.space</a> · <span class="gh-link-wrap"><a class="gh-link" href="https://github.com/sgrams/trx-rs" target="_blank" rel="noopener" aria-label="Open trx-rs on GitHub"><svg class="gh-link-icon" viewBox="0 0 16 16" aria-hidden="true"><path d="M8 0.2a8 8 0 0 0-2.53 15.59c0.4 0.07 0.55-0.17 0.55-0.39l-0.01-1.37c-2.23 0.49-2.7-0.95-2.7-0.95-0.36-0.91-0.89-1.15-0.89-1.15-0.73-0.49 0.06-0.48 0.06-0.48 0.8 0.06 1.22 0.82 1.22 0.82 0.72 1.22 1.88 0.87 2.34 0.67 0.07-0.51 0.28-0.86 0.5-1.06-1.78-0.2-3.64-0.89-3.64-3.95 0-0.87 0.31-1.58 0.81-2.14-0.08-0.2-0.35-1.02 0.08-2.12 0 0 0.67-0.21 2.2 0.82a7.56 7.56 0 0 1 4.01 0c1.53-1.03 2.2-0.82 2.2-0.82 0.43 1.1 0.16 1.92 0.08 2.12 0.51 0.56 0.81 1.27 0.81 2.14 0 3.07-1.87 3.75-3.66 3.95 0.29 0.25 0.54 0.73 0.54 1.48l-0.01 2.2c0 0.22 0.14 0.47 0.55 0.39A8 8 0 0 0 8 0.2Z"></path></svg><span>trx-rs on GitHub</span></a></span> — <span id="copyright-year"></span>
+        Built by <a href="https://www.qrzcq.com/call/SP2SJG" target="_blank" rel="noopener">SP2SJG</a> from <a href="https://haxx.space" target="_blank" rel="noopener">haxx.space</a> · <span class="gh-link-wrap"><a class="gh-link" href="https://git.haxx.space/sjg/trx-rs" target="_blank" rel="noopener" aria-label="Open trx-rs source repository"><svg class="gh-link-icon" viewBox="0 0 16 16" aria-hidden="true"><path d="M9.5 3.25a2.25 2.25 0 1 1 3 2.122V6A2.5 2.5 0 0 1 10 8.5H6a1 1 0 0 0-1 1v1.128a2.251 2.251 0 1 1-1.5 0V5.372a2.25 2.25 0 1 1 1.5 0v1.836A2.493 2.493 0 0 1 6 7h4a1 1 0 0 0 1-1v-.628A2.25 2.25 0 0 1 9.5 3.25Zm-6 0a.75.75 0 1 0 1.5 0 .75.75 0 0 0-1.5 0Zm8.25-.75a.75.75 0 1 0 0 1.5.75.75 0 0 0 0-1.5ZM4.25 12a.75.75 0 1 0 0 1.5.75.75 0 0 0 0-1.5Z"></path></svg><span>trx-rs source</span></a></span> — <span id="copyright-year"></span>
       </div>
       <div class="hint" id="power-hint" aria-live="polite">Connecting…</div>
     </div>

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

@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+//
+// 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.
 (function () {
@@ -1543,6 +1547,7 @@
     pruneMapHistory();
   }
 
+  let stageResizeObserver = null;
   function initAprsMap() {
     if (typeof L === "undefined") return;
     const mapEl = document.getElementById("aprs-map");
@@ -1555,6 +1560,19 @@
     const zoom = hasLocation ? T.initialMapZoom : 2;
 
     aprsMap = L.map("aprs-map").setView(center, zoom);
+
+    // Observe the parent stage for size changes.  Display:none → "" on the
+    // map tab, late-arriving content above the map, or any other layout
+    // shift would otherwise leave Leaflet's internal pane sized against
+    // stale dimensions until the user clicked the map.  Observing the
+    // *parent* (not #aprs-map itself, which we resize) avoids feedback
+    // loops from sizeAprsMapToViewport's own height assignments.
+    const stage = mapStageEl();
+    if (stage && typeof ResizeObserver !== "undefined") {
+      if (stageResizeObserver) stageResizeObserver.disconnect();
+      stageResizeObserver = new ResizeObserver(() => sizeAprsMapToViewport());
+      stageResizeObserver.observe(stage);
+    }
     updateMapBaseLayerForTheme(T.currentTheme());
     syncAprsReceiverMarker();
 
@@ -1848,10 +1866,13 @@
     initAprsMap();
     sizeAprsMapToViewport();
     if (aprsMap) {
-      setTimeout(() => {
+      requestAnimationFrame(() => {
-        aprsMap.invalidateSize();
+        requestAnimationFrame(() => {
-        aprsMap.setView([lat, lon], 13);
+          sizeAprsMapToViewport();
-      }, 50);
+          aprsMap.invalidateSize();
+          aprsMap.setView([lat, lon], 13);
+        });
+      });
     }
   };
 
@@ -1896,6 +1917,7 @@
     const center = locatorMarkerCenter(marker);
     const focusMarker = () => {
       if (!aprsMap || !marker) return;
+      sizeAprsMapToViewport();
       aprsMap.invalidateSize();
       if (center) {
         const targetZoom = Math.max(aprsMap.getZoom() || 0, 7);
@@ -1910,7 +1932,9 @@
       if (typeof marker.openPopup === "function") marker.openPopup();
     };
     focusMarker();
-    setTimeout(focusMarker, 60);
+    requestAnimationFrame(() => {
+      requestAnimationFrame(focusMarker);
+    });
     return true;
   };
 

src/trx-client/trx-frontend/trx-frontend-http/assets/web/plugins/ais.js

@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+//
+// SPDX-License-Identifier: GPL-2.0-or-later
+
 // --- AIS Decoder Plugin (server-side decode) ---
 const aisStatus = document.getElementById("ais-status");
 const aisMessagesEl = document.getElementById("ais-messages");

src/trx-client/trx-frontend/trx-frontend-http/assets/web/plugins/aprs.js

@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+//
+// SPDX-License-Identifier: GPL-2.0-or-later
+
 // --- APRS Decoder Plugin (server-side decode) ---
 const aprsStatus = document.getElementById("aprs-status");
 const aprsPacketsEl = document.getElementById("aprs-packets");

src/trx-client/trx-frontend/trx-frontend-http/assets/web/plugins/background-decode.js

@@ -1,6 +1,6 @@
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
 //
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 (function () {
   "use strict";

src/trx-client/trx-frontend/trx-frontend-http/assets/web/plugins/bookmarks.js

@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+//
+// SPDX-License-Identifier: GPL-2.0-or-later
+
 // --- Bookmarks Tab ---
 
 /** Current bookmark scope: "general" or a rig remote name. */

src/trx-client/trx-frontend/trx-frontend-http/assets/web/plugins/cw.js

@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+//
+// SPDX-License-Identifier: GPL-2.0-or-later
+
 // --- CW (Morse) Decoder Plugin (server-side decode) ---
 const cwStatusEl = document.getElementById("cw-status");
 const cwOutputEl = document.getElementById("cw-output");

src/trx-client/trx-frontend/trx-frontend-http/assets/web/plugins/ft2.js

@@ -1,6 +1,6 @@
 // --- FT2 Decoder Plugin (server-side decode) ---
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 function ft8RenderMessageFt2(message) {
   if (typeof renderFt8Message === "function") return renderFt8Message(message);

src/trx-client/trx-frontend/trx-frontend-http/assets/web/plugins/ft4.js

@@ -1,6 +1,6 @@
 // --- FT4 Decoder Plugin (server-side decode) ---
 // SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
-// SPDX-License-Identifier: BSD-2-Clause
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 function ft8RenderMessage(message) {
   if (typeof renderFt8Message === "function") return renderFt8Message(message);

src/trx-client/trx-frontend/trx-frontend-http/assets/web/plugins/ft8.js

@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+//
+// SPDX-License-Identifier: GPL-2.0-or-later
+
 // --- FT8 Decoder Plugin (server-side decode) ---
 const ft8Status = document.getElementById("ft8-status");
 const ft8PeriodEl = document.getElementById("ft8-period");