| 66 | |
| 67 | // Construct a WebcamIterator and start it's video stream. |
| 68 | static async create( |
| 69 | webcamVideoElement?: HTMLVideoElement, webcamConfig: WebcamConfig = {}) { |
| 70 | if (!env().get('IS_BROWSER')) { |
| 71 | throw new Error( |
| 72 | 'tf.data.webcam is only supported in browser environment.'); |
| 73 | } |
| 74 | |
| 75 | if (!webcamVideoElement) { |
| 76 | // If webcam video element is not provided, create a hidden video element |
| 77 | // with provided width and height. |
| 78 | webcamVideoElement = document.createElement('video'); |
| 79 | if (!webcamConfig.resizeWidth || !webcamConfig.resizeHeight) { |
| 80 | throw new Error( |
| 81 | 'Please provide webcam video element, or resizeWidth and ' + |
| 82 | 'resizeHeight to create a hidden video element.'); |
| 83 | } |
| 84 | webcamVideoElement.width = webcamConfig.resizeWidth; |
| 85 | webcamVideoElement.height = webcamConfig.resizeHeight; |
| 86 | } |
| 87 | const webcamIterator = new WebcamIterator(webcamVideoElement, webcamConfig); |
| 88 | |
| 89 | // Call async function to initialize the video stream. |
| 90 | await webcamIterator.start(); |
| 91 | |
| 92 | return webcamIterator; |
| 93 | } |
| 94 | |
| 95 | // Async function to start video stream. |
| 96 | async start(): Promise<void> { |