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<!DOCTYPE html>
<html lang="en">
<title>SpeechRecognition Concurrent MediaStreamTracks</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
async function getAudioTrackFromFile(filePath) {
const audioContext = new AudioContext();
const response = await fetch(filePath);
const arrayBuffer = await response.arrayBuffer();
const audioBuffer = await audioContext.decodeAudioData(arrayBuffer);
const source = audioContext.createBufferSource();
source.buffer = audioBuffer;
const destination = audioContext.createMediaStreamDestination();
source.connect(destination);
source.start();
return destination.stream.getAudioTracks()[0];
}
promise_test(async (t) => {
const lang = "en-US";
window.SpeechRecognition = window.SpeechRecognition || window.webkitSpeechRecognition;
// Create two SpeechRecognition instances
const speechRecognition1 = new SpeechRecognition();
speechRecognition1.mode = 'cloud-only';
speechRecognition1.lang = lang;
const speechRecognition2 = new SpeechRecognition();
speechRecognition2.mode = 'cloud-only';
speechRecognition2.lang = lang;
const audioTrack1 = await getAudioTrackFromFile("/media/speech.wav");
const audioTrack2 = await getAudioTrackFromFile("/media/speech.wav");
assert_true(audioTrack1 instanceof MediaStreamTrack, "Audio track 1 should be a valid MediaStreamTrack");
assert_true(audioTrack2 instanceof MediaStreamTrack, "Audio track 2 should be a valid MediaStreamTrack");
const recognitionPromise1 = new Promise((resolve) => {
speechRecognition1.onresult = (event) => {
const transcript = event.results[0][0].transcript;
resolve(transcript);
};
});
const recognitionPromise2 = new Promise((resolve) => {
speechRecognition2.onresult = (event) => {
const transcript = event.results[0][0].transcript;
resolve(transcript);
};
});
speechRecognition1.start(audioTrack1);
speechRecognition2.start(audioTrack2);
const transcript1 = await recognitionPromise1;
const transcript2 = await recognitionPromise2;
assert_equals(transcript1.toLowerCase(), "this is a sentence in a single segment", "Speech recognition 1 should correctly recognize speech");
assert_equals(transcript2.toLowerCase(), "this is a sentence in a single segment", "Speech recognition 2 should correctly recognize speech");
}, "Two SpeechRecognition instances should simultaneously recognize speech from audio files.");
</script>
</html>
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