@face-auth/face-id-video/dist/src/faceCameraManager.js

Utility library for capturing photos from webcam video streams in the browser. Handles camera selection, image formatting, and output for face authentication APIs.

var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
export class FaceCameraManager {
    constructor(videoElement) {
        this.stream = null;
        this.video = videoElement;
    }
    /**
     * List available cameras
     */
    getDevices() {
        return __awaiter(this, void 0, void 0, function* () {
            const devices = yield navigator.mediaDevices.enumerateDevices();
            return devices.filter(d => d.kind === "videoinput");
        });
    }
    /**
     * Start video stream
     */
    start() {
        return __awaiter(this, arguments, void 0, function* (options = {}, deviceId) {
            let constraints = {
                video: {}
            };
            if (deviceId) {
                constraints.video = {
                    deviceId: { exact: deviceId }
                };
            }
            else if (options.preferredFacingMode) {
                constraints.video = {
                    facingMode: options.preferredFacingMode
                };
            }
            if (options.idealResolution) {
                constraints.video = Object.assign(Object.assign({}, constraints.video), { width: { ideal: options.idealResolution.width }, height: { ideal: options.idealResolution.height } });
            }
            try {
                this.stream = yield navigator.mediaDevices.getUserMedia(constraints);
                this.video.srcObject = this.stream;
                // Wait for metadata to ensure video dimensions are ready
                let promise = yield new Promise((resolve) => {
                    this.video.onloadedmetadata = () => {
                        resolve(this.video);
                    };
                });
                // Play requires user interaction in most browsers
                yield this.video.play();
                return promise;
            }
            catch (err) {
                const error = new Error((err === null || err === void 0 ? void 0 : err.message) || "Unknown error");
                if (err.name === "NotAllowedError") {
                    error.code = "PERMISSION_DENIED";
                }
                else if (err.name === "NotFoundError") {
                    error.code = "NO_DEVICES";
                }
                else if (err.name === "OverconstrainedError") {
                    error.code = "OVERCONSTRAINED";
                }
                else {
                    error.code = "UNKNOWN";
                }
                throw error;
            }
        });
    }
    /**
     * Stop the camera
     */
    stop() {
        if (this.stream) {
            this.stream.getTracks().forEach(t => t.stop());
            this.stream = null;
        }
        this.video.srcObject = null;
    }
}