| <!doctype html> |
| <html> |
| <head> |
| <title>MediaRecorder Blob event timecode</title> |
| <link rel="help" href="https://w3c.github.io/mediacapture-record/MediaRecorder.html#dom-mediarecorder-start"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/resources/testdriver.js"></script> |
| <script src="/resources/testdriver-vendor.js"></script> |
| <script src="../mediacapture-streams/permission-helper.js"></script> |
| </head> |
| <body> |
| |
| <script> |
| promise_test(async t => { |
| await setMediaPermission(); |
| const stream = await navigator.mediaDevices.getUserMedia({video:true, audio:true}); |
| t.add_cleanup(() => stream.getTracks().forEach(tr => tr.stop())); |
| const recorder = new MediaRecorder(stream); |
| |
| // Sets 0 timeslice will call the first chunk to be triggered immediately. |
| recorder.start(0); |
| let combinedSize = 0; |
| let previous_timecode = 0; |
| while (combinedSize < 2000) { |
| const {data, timecode} = await new Promise(r => recorder.ondataavailable = r); |
| if (combinedSize === 0) { |
| assert_equals(timecode, 0, "first chunk timecode must be 0"); |
| } else { |
| assert_greater_than(timecode, previous_timecode, "timecode must increase monotonically"); |
| } |
| previous_timecode = timecode; |
| combinedSize += data.size; |
| } |
| recorder.stop(); |
| }, "MediaRecorder Blob timecode for first chunk must be 0 and monotonically increasing"); |
| |
| </script> |
| </body> |
| </html> |
