function setAspectRatio()

in src/windows/CameraProxy.js [562:598]
33 lines of code
4 McCabe index (conditional complexity)

    function setAspectRatio (capture, aspect) {
        // Max photo resolution with desired aspect ratio
        var videoDeviceController = capture.videoDeviceController;
        var photoResolution = videoDeviceController.getAvailableMediaStreamProperties(CapMSType.photo)
            .filter(function (elem) {
                return ((elem.width / elem.height).toFixed(1) === aspect);
            })
            .reduce(function (prop1, prop2) {
                return (prop1.width * prop1.height) > (prop2.width * prop2.height) ? prop1 : prop2;
            });

        // Max video resolution with desired aspect ratio
        var videoRecordResolution = videoDeviceController.getAvailableMediaStreamProperties(CapMSType.videoRecord)
            .filter(function (elem) {
                return ((elem.width / elem.height).toFixed(1) === aspect);
            })
            .reduce(function (prop1, prop2) {
                return (prop1.width * prop1.height) > (prop2.width * prop2.height) ? prop1 : prop2;
            });

        // Max video preview resolution with desired aspect ratio
        var videoPreviewResolution = videoDeviceController.getAvailableMediaStreamProperties(CapMSType.videoPreview)
            .filter(function (elem) {
                return ((elem.width / elem.height).toFixed(1) === aspect);
            })
            .reduce(function (prop1, prop2) {
                return (prop1.width * prop1.height) > (prop2.width * prop2.height) ? prop1 : prop2;
            });

        return videoDeviceController.setMediaStreamPropertiesAsync(CapMSType.photo, photoResolution)
            .then(function () {
                return videoDeviceController.setMediaStreamPropertiesAsync(CapMSType.videoPreview, videoPreviewResolution);
            })
            .then(function () {
                return videoDeviceController.setMediaStreamPropertiesAsync(CapMSType.videoRecord, videoRecordResolution);
            });
    }