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[feat](trx-noaa): add NOAA APT satellite image decoder

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New trx-noaa crate: FFT-based Hilbert transform (rustfft) for 2400 Hz
AM demodulation, sync A detection via cross-correlation, line assembly
at 4160 Hz, and JPEG output via the image crate.

- trx-core: NoaaImage type, DecodedMessage::NoaaImage variant,
  noaa_decode_enabled/noaa_decode_reset_seq on RigState/RigSnapshot,
  AUDIO_MSG_NOAA_IMAGE = 0x16
- trx-server: DecoderHistories::noaa, run_noaa_decoder task (activates
  on noaa_decode_enabled, auto-finalises after 30 s silence), saves
  JPEGs to ~/.cache/trx-rs/noaa/<YYYY-MM-DD_HH-MM-SS>.jpg, forwards
  events over TCP audio channel and history replay

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
This commit is contained in:
Stan Grams
2026-03-28 07:00:24 +01:00
parent a8b19227d5
commit 4b40d44814
12 changed files with 852 additions and 5 deletions
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Cargo.toml
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@@ -5,6 +5,7 @@
[workspace]
members = [
"src/decoders/trx-ais",
"src/decoders/trx-noaa",
"src/decoders/trx-aprs",
"src/decoders/trx-cw",
"src/decoders/trx-decode-log",