How to convert buffer of BGRA frame to UIImage - ios

Question

I am currently getting this error while trying to program an iOS app to view a frame sent over a TCP socket from a Java program using usbmuxd on a Mac.
2019-03-07 14:03:59.539127-0800 Dashboard[26848:9393967] [Unknown process name] copy_read_only: vm_copy failed: status 1.
Currently I don't know why it's failing, but the line it fails on is the UIImage.init call at the bottom.
Any help would be greatly appreciated.
Code:
class ViewController: UIViewController {
#IBOutlet weak var cameraView: UIImageView!
func echoService(client: TCPClient) {
print("New client from:\(client.address)[\(client.port)]")
var d = client.read(1280 * 720 * 4)
var image = self.imageFromSampleBuffer(sampleBuffer: d!)
cameraView.image = image
client.close()
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let server = TCPServer(address: "127.0.0.1", port: 5000)
switch server.listen() {
case .success:
while true {
if var client = server.accept() {
echoService(client: client)
} else {
print("accept error")
}
}
case .failure(let error):
print(error)
}
}
func imageFromSampleBuffer(sampleBuffer : Any) -> UIImage
{
var inputBuffer = sampleBuffer
// Create a device-dependent RGB color space
let colorSpace = CGColorSpaceCreateDeviceRGB();
// Create a bitmap graphics context with the sample buffer data
var bitmapInfo: UInt32 = CGBitmapInfo.byteOrder32Big.rawValue
bitmapInfo |= CGImageAlphaInfo.premultipliedLast.rawValue & CGBitmapInfo.alphaInfoMask.rawValue
let context = CGContext(data: &inputBuffer, width: 1280, height: 720, bitsPerComponent: 8,
bytesPerRow: 1280 * 4, space: colorSpace, bitmapInfo: CGImageAlphaInfo.noneSkipFirst.rawValue);
// Create a Quartz image from the pixel data in the bitmap graphics context
let quartzImage = context!.makeImage();
// Create an image object from the Quartz image
let image = UIImage.init(cgImage: quartzImage!);
return (image);
}
}