Mirror/intercept
1
0
Fork 0
mirror of https://github.com/smittix/intercept.git synced 2026-04-24 14:50:00 -07:00
Code Issues Packages Projects Releases Wiki Activity

Replace broken slowrx dependency with pure Python SSTV decoder

Browse Source 
slowrx is a GTK GUI app that doesn't support CLI usage, so the SSTV
decoder was silently failing. This replaces it with a pure Python
implementation using numpy and Pillow that supports Robot36/72,
Martin1/2, Scottie1/2, and PD120/180 modes via VIS header auto-detection.

Key implementation details:
- Generalized Goertzel (DTFT) for exact-frequency tone detection
- Vectorized batch Goertzel for real-time pixel decoding performance
- Overlapping analysis windows for short-window frequency estimation
- VIS header detection state machine with parity validation
- Per-line sync re-synchronization for drift tolerance

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Smittix
2026-02-06 19:47:02 +00:00
parent ae9fe5d063
commit ef7d8cca9f
16 changed files with 2978 additions and 877 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
static/js/modes/sstv-general.js
View File

@@ -52,7 +52,7 @@ const SSTVGeneral = (function() {
if (!data.available) {
updateStatusUI('unavailable', 'Decoder not installed');
showStatusMessage('SSTV decoder not available. Install slowrx: apt install slowrx', 'warning');
showStatusMessage('SSTV decoder not available. Install numpy and Pillow: pip install numpy Pillow', 'warning');
return;
}