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1 /** | |
2 * Copyright 2017 The Chromium Authors. All rights reserved. | |
3 * Use of this source code is governed by a BSD-style license that can be | |
4 * found in the LICENSE file. | |
5 */ | |
6 | |
7 /** | |
8 * Aggregate target bits per second for encoding of the Audio track. | |
9 * @private | |
10 */ | |
11 const AUDIO_BITS_PER_SECOND = 3000000; | |
12 | |
13 var CAPTURE_STATUS = 'not-started'; | |
mcasas
2017/03/22 17:04:55
This is a true variable, so
s/CAPTURE_STATUS/captu
| |
14 | |
15 /** | |
16 * Starts the audio capturing. | |
17 * | |
18 * @param {Number} The duration of the capture in seconds. | |
19 */ | |
20 function startAudioCapture(capture_duration_in_seconds, output_file) { | |
21 console.log('Started capturing for ' + capture_duration_in_seconds + 's to ' | |
22 + output_file); | |
23 var inputElement = document.getElementById('remote-view'); | |
24 | |
25 // |audioBitsPerSecond| must set to a large number to throw as little | |
26 // information away as possible. | |
27 var mediaRecorderOptions = { | |
28 audioBitsPerSecond: AUDIO_BITS_PER_SECOND, | |
29 mimeType: 'audio/webm', | |
30 }; | |
31 var stream = inputElement.srcObject; | |
32 var mediaRecorder = new MediaRecorder(stream, mediaRecorderOptions); | |
33 | |
34 var audio_chunks = []; | |
35 | |
36 mediaRecorder.ondataavailable = function(recording) { | |
37 audio_chunks.push(recording.data); | |
38 } | |
39 mediaRecorder.onstop = function() { | |
40 var audioBlob = new Blob(audio_chunks, {type: 'audio/webm'}); | |
41 | |
42 var url = window.URL.createObjectURL(audioBlob); | |
43 var a = document.createElement('a'); | |
44 document.body.appendChild(a); | |
45 | |
46 a.href = url; | |
47 a.download = output_file; | |
48 a.click(); | |
49 | |
50 CAPTURE_STATUS = 'done-capturing'; | |
51 } | |
52 | |
53 mediaRecorder.start(); | |
54 CAPTURE_STATUS = 'started'; | |
55 setTimeout(function() { mediaRecorder.stop(); }, | |
56 capture_duration_in_seconds * 1000); | |
57 | |
58 returnToTest('ok-capturing'); | |
59 } | |
60 | |
61 function getCaptureStatus() { | |
62 returnToTest(CAPTURE_STATUS); | |
mcasas
2017/03/22 17:04:55
getCaptureStatus() uses only compare the returned
| |
63 } | |
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