| <!DOCTYPE html> |
| <html lang="en"> |
| <title>SpeechRecognition MediaStreamTrack</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; |
| const speechRecognition = new SpeechRecognition(); |
| speechRecognition.processLocally = false; |
| speechRecognition.lang = lang; |
| const audioTrack = await getAudioTrackFromFile("/media/speech.wav"); |
| |
| assert_true(audioTrack instanceof MediaStreamTrack, "Audio track should be a valid MediaStreamTrack"); |
| |
| const recognitionPromise = new Promise((resolve) => { |
| speechRecognition.onresult = (event) => { |
| const transcript = event.results[0][0].transcript; |
| resolve(transcript); |
| }; |
| }); |
| |
| speechRecognition.start(audioTrack); |
| |
| const transcript = await recognitionPromise; |
| assert_equals(transcript.toLowerCase(), "this is a sentence in a single segment", "Speech recognition should correctly recognize 'hello world'"); |
| |
| // Start speech recognition without a media stream track on the same instance should fail. |
| try { |
| speechRecognition.start(); |
| assert_unreached(); |
| } catch (e) { |
| assert_equals(e.name, "InvalidStateError", "Second call to start() should throw an InvalidStateError"); |
| } |
| }, "SpeechRecognition should recognize speech from an audio file."); |
| </script> |
| </html> |
