| <!doctype html> |
| <html> |
| <head> |
| <title>MediaRecorder audio bitrate</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| </head> |
| <body> |
| <script> |
| async function record(stream, bitRate) |
| { |
| const recorder = new MediaRecorder(stream, { audioBitsPerSecond : bitRate }); |
| const promise = new Promise((resolve, reject) => { |
| recorder.ondataavailable = (e) => resolve(e.data); |
| setTimeout(reject, 5000); |
| }); |
| recorder.start(); |
| setTimeout(() => recorder.stop(), 2500); |
| return promise; |
| } |
| |
| promise_test(async (t) => { |
| const stream = await navigator.mediaDevices.getUserMedia({ audio : true }); |
| const bitRates = [128000, 192000, 256000, 12000, 24000, 108555]; |
| let promises = []; |
| bitRates.forEach(bitRate => { |
| promises.push(record(stream, bitRate)); |
| }); |
| |
| let blobs = new Array(bitRates.length).fill(0); |
| promises.forEach(async (promise, index) => { |
| blobs[index] = await promise; |
| }); |
| await Promise.all(promises); |
| |
| let counter = 0; |
| blobs.forEach(blob => { |
| assert_not_equals(blob.size, 0, "bitrate " + bitRates[counter++]); |
| }); |
| assert_greater_than(blobs[2].size, blobs[0].size); |
| }, "Various audio bitrates"); |
| </script> |
| </body> |
| </html> |
