PowerOn/service-teams-browser-bot
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fix: Audio-Chunk Overlap - 1s Pre-Roll nach gesendeten Chunks behalten, STT Wortanfang nicht abschneiden

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This commit is contained in:
ValueOn AG 2026-03-07 02:12:20 +01:00
parent f8bd473008
commit 96819abcf2
1 changed files with 10 additions and 6 deletions
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16
src/bot/audioCaptureProcedure.ts
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@ -23,7 +23,7 @@ class AudioCaptureProcessor extends AudioWorkletProcessor {
this.targetRate = opts.targetRate || 16000;
this.maxSamplesPerChunk = this.nativeRate * 8;
this.minRmsThreshold = 0.0003;
this.preRollSamples = Math.ceil(this.nativeRate * 0.5);
this.preRollSamples = Math.ceil(this.nativeRate * 1.0);
this.minFlushSamples = Math.ceil(this.nativeRate * 0.5);
this.silenceFlushCallbacks = 6;
this.ratio = this.nativeRate / this.targetRate;
@ -99,8 +99,10 @@ class AudioCaptureProcessor extends AudioWorkletProcessor {
return true;
}
this.chunkBuffer = [];
this.samplesCollected = 0;
const keep = Math.min(this.preRollSamples, merged.length);
const preRoll = merged.slice(merged.length - keep);
this.chunkBuffer = [preRoll];
this.samplesCollected = keep;
}
return true;
}
@ -274,7 +276,7 @@ export class AudioCaptureProcedure {
const useScriptProcessor = () => {
const minRmsThreshold = 0.0003;
const maxSamplesPerChunk = nativeRate * 8;
const preRollSamples = Math.ceil(nativeRate * 0.5);
const preRollSamples = Math.ceil(nativeRate * 1.0);
const minFlushSamples = Math.ceil(nativeRate * 0.5);
const silenceFlushCallbacks = 6;
const ratio = nativeRate / targetRate;
@ -348,8 +350,10 @@ export class AudioCaptureProcedure {
samplesCollected = keep;
return;
}
chunkBuffer = [];
samplesCollected = 0;
const keep = Math.min(preRollSamples, merged.length);
const preRoll = merged.slice(merged.length - keep);
chunkBuffer = [preRoll];
samplesCollected = keep;
}
};