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Add real-time signal level monitor to SSTV decoder UI

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Shows RMS audio level bar and SSTV tone classification (leader/sync/noise)
via SSE during detecting mode, replacing the static "Listening..." state
with actionable signal feedback.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Smittix
2026-02-07 11:25:01 +00:00
parent e8727358eb
commit 82957ab162
5 changed files with 311 additions and 1 deletions
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62
static/js/modes/sstv-general.js
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@@ -247,9 +247,71 @@ const SSTVGeneral = (function() {
updateStatusUI('listening', 'Listening...');
} else if (data.status === 'detecting') {
updateStatusUI('listening', data.message || 'Listening...');
if (data.signal_level !== undefined) {
renderSignalMonitor(data);
}
}
}
/**
* Render signal monitor in live area during detecting mode
*/
function renderSignalMonitor(data) {
const container = document.getElementById('sstvGeneralLiveContent');
if (!container) return;
const level = data.signal_level || 0;
const tone = data.sstv_tone;
let barColor, statusText;
if (tone === 'leader') {
barColor = 'var(--accent-green)';
statusText = 'SSTV leader tone detected';
} else if (tone === 'sync') {
barColor = 'var(--accent-cyan)';
statusText = 'SSTV sync pulse detected';
} else if (tone === 'noise') {
barColor = 'var(--text-dim)';
statusText = 'Audio signal present';
} else if (level > 10) {
barColor = 'var(--text-dim)';
statusText = 'Audio signal present';
} else {
barColor = 'var(--text-dim)';
statusText = 'No signal';
}
let monitor = container.querySelector('.sstv-general-signal-monitor');
if (!monitor) {
container.innerHTML = `
<div class="sstv-general-signal-monitor">
<div class="sstv-general-signal-monitor-header">
<svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
<path d="M2 12L5 12M5 12C5 12 6 3 12 3C18 3 19 12 19 12M19 12L22 12"/>
<circle cx="12" cy="18" r="2"/>
<path d="M12 16V12"/>
</svg>
Signal Monitor
</div>
<div class="sstv-general-signal-level-row">
<span class="sstv-general-signal-level-label">LEVEL</span>
<div class="sstv-general-signal-bar-track">
<div class="sstv-general-signal-bar-fill" style="width: 0%"></div>
</div>
<span class="sstv-general-signal-level-value">0</span>
</div>
<div class="sstv-general-signal-status-text">No signal</div>
</div>`;
monitor = container.querySelector('.sstv-general-signal-monitor');
}
const fill = monitor.querySelector('.sstv-general-signal-bar-fill');
fill.style.width = level + '%';
fill.style.background = barColor;
monitor.querySelector('.sstv-general-signal-status-text').textContent = statusText;
monitor.querySelector('.sstv-general-signal-level-value').textContent = level;
}
/**
* Render decode progress in live area
*/