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Fix audio visualizer exception #1008

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Fix audio visualizer exception #1008

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4fd3c84
fix
hiroshihorie Feb 26, 2026
73961ec
fix ios
hiroshihorie Feb 26, 2026
b618635
changes
hiroshihorie Feb 26, 2026
1c98282
nit
hiroshihorie Feb 26, 2026
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1 change: 1 addition & 0 deletions .changes/fix-audio-visualizer-missing-plugin-exception
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
patch type="fixed" "MissingPluginException when stopping audio visualizer on Android/iOS"
6 changes: 4 additions & 2 deletions lib/src/track/audio_visualizer_native.dart
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Expand Up @@ -53,11 +53,13 @@ class AudioVisualizerNative extends AudioVisualizer {
return;
}

await Native.stopVisualizer(mediaStreamTrack.id!, visualizerId: visualizerId);

// Cancel subscription before native stop, otherwise the native
// StreamHandler is already removed and cancel throws MissingPluginException.
await _streamSubscription?.cancel();
_streamSubscription = null;
_eventChannel = null;

await Native.stopVisualizer(mediaStreamTrack.id!, visualizerId: visualizerId);
}
}

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1 change: 1 addition & 0 deletions shared_swift/LiveKitPlugin.swift
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Expand Up @@ -201,6 +201,7 @@ public class LiveKitPlugin: NSObject, FlutterPlugin {
}

for processors in audioProcessors.values {
processors.visualizers[visualizerId]?.stop()
processors.visualizers.removeValue(forKey: visualizerId)
}

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7 changes: 6 additions & 1 deletion shared_swift/Visualizer.swift
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Expand Up @@ -69,8 +69,13 @@ public class Visualizer: NSObject, RTCAudioRenderer, FlutterStreamHandler {
channel?.setStreamHandler(self)
}

deinit {
public func stop() {
_track?.remove(audioRenderer: self)
channel?.setStreamHandler(nil)
}

deinit {
stop()
}

public func render(pcmBuffer: AVAudioPCMBuffer) {
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