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Fix airband audio using async/await pattern from working code

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- Convert startAirband to async function
- Add 300ms delay after backend start for stream readiness
- Properly reset audio element before connecting to stream
- Add both oncanplay and immediate play() for browser compatibility
- Add console logging for debugging
- Show visualizer container when audio starts

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Smittix
2026-01-15 15:54:28 +00:00
parent 4018f95723
commit 4224418e6f
1 changed files with 65 additions and 49 deletions
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114
templates/adsb_dashboard.html
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@@ -2987,7 +2987,7 @@ sudo make install</code>
}
}
function startAirband() {
async function startAirband() {
const frequency = getAirbandFrequency();
const device = parseInt(document.getElementById('airbandDeviceSelect').value);
const squelch = parseInt(document.getElementById('airbandSquelch').value);
@@ -3007,62 +3007,78 @@ sudo make install</code>
document.getElementById('airbandStatus').textContent = 'STARTING...';
document.getElementById('airbandStatus').style.color = 'var(--accent-orange)';
fetch('/listening/audio/start', {
method: 'POST',
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify({
frequency: frequency,
modulation: 'am', // Airband uses AM
squelch: squelch,
gain: 40,
device: device
})
})
.then(r => r.json())
.then(data => {
if (data.status === 'started') {
isAirbandPlaying = true;
try {
// Start audio on backend
const response = await fetch('/listening/audio/start', {
method: 'POST',
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify({
frequency: frequency,
modulation: 'am', // Airband uses AM
squelch: squelch,
gain: 40,
device: device
})
});
// Start browser audio playback
const audioPlayer = document.getElementById('airbandPlayer');
const data = await response.json();
console.log('[AIRBAND] Backend response:', data.status);
// Stop any existing playback first
audioPlayer.pause();
audioPlayer.currentTime = 0;
audioPlayer.src = '/listening/audio/stream?' + Date.now();
// Apply current volume setting
const volume = parseInt(document.getElementById('airbandVolume').value) || 80;
audioPlayer.volume = volume / 100;
// Initialize visualizer before playing
initAirbandVisualizer();
// Wait for audio to be ready before playing
audioPlayer.oncanplay = function() {
audioPlayer.play().catch(e => {
console.warn('Audio playback issue:', e);
document.getElementById('airbandStatus').textContent = 'AUDIO BLOCKED';
document.getElementById('airbandStatus').style.color = 'var(--accent-orange)';
});
audioPlayer.oncanplay = null;
};
document.getElementById('airbandBtn').innerHTML = '<span class="airband-icon">⏹</span> STOP';
document.getElementById('airbandBtn').classList.add('active');
document.getElementById('airbandStatus').textContent = frequency.toFixed(3) + ' MHz';
document.getElementById('airbandStatus').style.color = 'var(--accent-green)';
} else {
if (data.status !== 'started') {
document.getElementById('airbandStatus').textContent = 'ERROR';
document.getElementById('airbandStatus').style.color = 'var(--accent-red)';
alert('Airband Error: ' + (data.message || 'Failed to start'));
return;
}
})
.catch(err => {
isAirbandPlaying = true;
// Wait for stream to be ready (backend needs time to start rtl_fm)
await new Promise(r => setTimeout(r, 300));
// Setup audio player
const audioPlayer = document.getElementById('airbandPlayer');
// Fully reset audio element
audioPlayer.oncanplay = null;
try { audioPlayer.pause(); } catch (e) {}
audioPlayer.removeAttribute('src');
audioPlayer.load();
// Connect to stream
const streamUrl = `/listening/audio/stream?t=${Date.now()}`;
console.log('[AIRBAND] Connecting to stream:', streamUrl);
audioPlayer.src = streamUrl;
// Apply current volume setting
const volume = parseInt(document.getElementById('airbandVolume').value) || 80;
audioPlayer.volume = volume / 100;
// Initialize visualizer
initAirbandVisualizer();
// Wait for audio to be ready then play
audioPlayer.oncanplay = () => {
console.log('[AIRBAND] Audio can play');
audioPlayer.play().catch(e => console.warn('[AIRBAND] Autoplay blocked:', e));
};
// Also try to play immediately (some browsers need this)
audioPlayer.play().catch(e => {
console.log('[AIRBAND] Initial play blocked, waiting for canplay');
});
document.getElementById('airbandBtn').innerHTML = '<span class="airband-icon">⏹</span> STOP';
document.getElementById('airbandBtn').classList.add('active');
document.getElementById('airbandStatus').textContent = frequency.toFixed(3) + ' MHz';
document.getElementById('airbandStatus').style.color = 'var(--accent-green)';
document.getElementById('airbandVisualizerContainer').style.display = 'flex';
} catch (err) {
console.error('[AIRBAND] Error:', err);
document.getElementById('airbandStatus').textContent = 'ERROR';
document.getElementById('airbandStatus').style.color = 'var(--accent-red)';
});
}
}
function stopAirband() {