75 lines
2.3 KiB
JavaScript
75 lines
2.3 KiB
JavaScript
/*
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* Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree.
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*/
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'use strict';
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const videoElement = document.querySelector('video');
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const videoSelect = document.querySelector('select#videoSource');
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const resizableElements = document.querySelectorAll(".video_sized")
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const selectors = [ videoSelect];
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function gotDevices(deviceInfos) {
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// Handles being called several times to update labels. Preserve values.
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const values = selectors.map(select => select.value);
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selectors.forEach(select => {
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while (select.firstChild) {
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select.removeChild(select.firstChild);
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}
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});
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for (let i = 0; i !== deviceInfos.length; ++i) {
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const deviceInfo = deviceInfos[i];
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const option = document.createElement('option');
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option.value = deviceInfo.deviceId;
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if (deviceInfo.kind === 'videoinput') {
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option.text = deviceInfo.label || `camera ${videoSelect.length + 1}`;
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videoSelect.appendChild(option);
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}
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}
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selectors.forEach((select, selectorIndex) => {
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if (Array.prototype.slice.call(select.childNodes).some(n => n.value === values[selectorIndex])) {
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select.value = values[selectorIndex];
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}
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});
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}
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navigator.mediaDevices.enumerateDevices().then(gotDevices).catch(handleError);
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function gotStream(stream) {
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window.stream = stream; // make stream available to console
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videoElement.srcObject = stream;
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let track = stream.getTracks()[0]
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let settings = track.getSettings()
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resizableElements.forEach( el => { el.width = settings.width; el.height = settings.height; } )
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// Refresh button list in case labels have become available
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return navigator.mediaDevices.enumerateDevices();
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}
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function handleError(error) {
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console.log('navigator.MediaDevices.getUserMedia error: ', error.message, error.name);
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}
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function start() {
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if (window.stream) {
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window.stream.getTracks().forEach(track => {
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track.stop();
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});
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}
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const videoSource = videoSelect.value;
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const constraints = {
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video: {deviceId: videoSource ? {exact: videoSource} : undefined}
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};
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navigator.mediaDevices.getUserMedia(constraints).then(gotStream).then(gotDevices).catch(handleError);
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}
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videoSelect.onchange = start;
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start();
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