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Prevent speech recognition feedback loops during TTS #89

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77 changes: 57 additions & 20 deletions AI/app.js
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Original file line number Diff line number Diff line change
Expand Up @@ -34,6 +34,9 @@ let pendingHeroUrl = '';
let currentTheme = 'dark';
let recognitionRestartTimeout = null;
let appStarted = false;
const SPEECH_RECOGNITION_SUPPRESSION_MS = 400;
let isAiSpeaking = false;
let suppressRecognitionUntil = 0;
const SpeechRecognition = window.SpeechRecognition || window.webkitSpeechRecognition;
const synth = window.speechSynthesis;

Expand Down Expand Up @@ -570,7 +573,23 @@ function setupSpeechRecognition() {
};

recognition.onresult = (event) => {
const transcript = event.results[event.results.length - 1][0].transcript.trim();
const latestResult = event.results[event.results.length - 1]?.[0];
const transcript = latestResult?.transcript?.trim() ?? '';
const now = Date.now();

if (isAiSpeaking || now < suppressRecognitionUntil) {
if (transcript) {
console.log('Ignoring speech recognition result during AI speech:', transcript);
} else {
console.log('Ignoring speech recognition result during AI speech.');
}
return;
}

if (!transcript) {
return;
}

console.log('User said:', transcript);

setCircleState(userCircle, {
Expand Down Expand Up @@ -1101,6 +1120,33 @@ function parseAiDirectives(responseText) {
return { cleanedText, commands: uniqueCommands };
}

function finalizeSpeechPlayback({ maintainVisuals = false, applySuppression = true } = {}) {
isAiSpeaking = false;

if (applySuppression) {
suppressRecognitionUntil = Date.now() + SPEECH_RECOGNITION_SUPPRESSION_MS;
}

if (!maintainVisuals) {
setCircleState(aiCircle, {
speaking: false,
label: 'Unity is idle'
});
}
}

function stopSpeechPlayback(options = {}) {
if (synth.speaking) {
try {
synth.cancel();
} catch (error) {
console.error('Failed to cancel speech synthesis:', error);
}
}

finalizeSpeechPlayback(options);
}

async function executeAiCommand(command, options = {}) {
if (!command) {
return false;
Expand All @@ -1117,11 +1163,7 @@ async function executeAiCommand(command, options = {}) {
return true;
case 'stop_speaking':
case 'shutup':
synth.cancel();
setCircleState(aiCircle, {
speaking: false,
label: 'Unity is idle'
});
stopSpeechPlayback();
return true;
case 'copy_image':
await copyImageToClipboard(options.imageUrl);
Expand Down Expand Up @@ -1161,11 +1203,7 @@ async function executeAiCommand(command, options = {}) {

function speak(text) {
if (synth.speaking) {
synth.cancel();
setCircleState(aiCircle, {
speaking: false,
label: 'Unity is idle'
});
stopSpeechPlayback({ maintainVisuals: true });
}

const sanitizedText = sanitizeForSpeech(text);
Expand All @@ -1187,6 +1225,7 @@ function speak(text) {
}

utterance.onstart = () => {
isAiSpeaking = true;
console.log('AI is speaking...');
setCircleState(aiCircle, {
speaking: true,
Expand All @@ -1196,10 +1235,12 @@ function speak(text) {

utterance.onend = () => {
console.log('AI finished speaking.');
setCircleState(aiCircle, {
speaking: false,
label: 'Unity is idle'
});
finalizeSpeechPlayback();
};

utterance.onerror = (event) => {
console.error('Speech synthesis error:', event.error);
finalizeSpeechPlayback();
};

synth.speak(utterance);
Expand Down Expand Up @@ -1229,11 +1270,7 @@ function handleVoiceCommand(command) {
}

if (lowerCaseCommand.includes('shut up') || lowerCaseCommand.includes('be quiet')) {
synth.cancel();
setCircleState(aiCircle, {
speaking: false,
label: 'Unity is idle'
});
stopSpeechPlayback();
return true;
}

Expand Down