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zebra-spaces: prime audioCtx on first interaction anywhere (fix desktop auto-rejoin regression)

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Fox 2026-06-05: "speaker on firefox chrome was hard restarted and
cannot hear host" / "host is working phone listeners hear host, speaker
does not see hosts mic open or waveform."

Root cause: desktop auto-rejoin reaches joinSpace() without a click,
so primeAudioOnGesture() never fires. Chrome (Fedora especially)
leaves audioCtx suspended until a real user gesture, and the
fire-and-forget audioCtx.resume() inside attachAudioStreamViaWorklet
silently fails outside one. Worklet reports "started" but the
destination renders nothing, the meter analyser pulls no samples →
no audio, no waveform, no mic-open indicator (the indicator IS the
waveform).

Pre-zero-click-auto-rejoin, the manual entry button always primed
audio; the regression arrived with that convenience. Now: install a
document-wide one-shot click/keydown/touchstart listener that calls
primeAudioOnGesture() on first interaction anywhere. Zero-click
auto-rejoin convenience preserved — any later page click engages
audio for the rest of the session.

Listener self-unregisters after firing so we don't repeatedly spawn
silent oscillators. Idempotent — primeAudioOnGesture's audioCtx
check makes re-runs safe.
This commit is contained in:
Russell Ballestrini 2026-06-05 16:05:54 -04:00
parent 999e772c20
commit 61d456d113
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1 changed files with 30 additions and 2 deletions
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32
web/zebra-spaces.html
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@ -7365,6 +7365,34 @@ $('rdv-code').addEventListener('keydown', e=>{
if(e.key==='Enter'){ e.preventDefault(); primeAudioOnGesture(); joinSpace(); }
});
/* Desktop auto-rejoin (below) reaches joinSpace() without a click, so
* the entry-button gesture never fires. Chrome (Fedora especially)
* leaves audioCtx suspended until a real user gesture, and the
* fire-and-forget audioCtx.resume() inside attachAudioStreamViaWorklet
* silently fails outside a gesture → no audio, no waveform, no
* mic-open indicator. Fox 2026-06-05: "speaker on firefox chrome was
* hard restarted and cannot hear host."
*
* Document-wide one-shot listener: on first interaction anywhere (any
* click, any keydown), prime audio. Idempotent — primeAudioOnGesture()
* is safe to re-run because it checks `audioCtx` and only resumes if
* suspended. Unregisters itself after firing so we don't repeatedly
* spawn silent oscillators. */
(function installFirstGesturePrimer(){
let primed = false;
function prime(){
if (primed) return;
primed = true;
try { primeAudioOnGesture(); } catch(e){ logLine('err','first-gesture prime: '+e.message); }
document.removeEventListener('click', prime, true);
document.removeEventListener('keydown', prime, true);
document.removeEventListener('touchstart', prime, true);
}
document.addEventListener('click', prime, true);
document.addEventListener('keydown', prime, true);
document.addEventListener('touchstart', prime, true);
})();
/* ?code=… autofills the rendezvous code (used by the share URL). The code
* stays in the URL so a refresh keeps you in the same space; if you want
* to leave it cleanly, hit the leave button or close the tab. */
@ -7504,8 +7532,8 @@ logLine('', 'ready — pick a handle, type a rendezvous code, enter the space');
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