I needed to use OpenALPR as a sub-module of a project of mine, hence this wrapper was born.
It's a very simple package to be honest. In order to make it build, OpenALPR (https://github.com/openalpr/openalpr) should be installed on your machine.
It exposes a class called OpenALPR which you can import and use the C api through.
It gives you conveiently usable methods, for example recogniseBy(data:)
so you don't have to worry about converting the bytes into the appropriate form
for the C API, also it gives you more Swifty typed return values, no char *.
Actually it has two methods:
recogniseBy(data:)recogniseBy(filePath:).
Also, you can set how many plates you want it to discover at max. You can see an example of that below.
You don't have to worry about importing the right version of openalpr for your OS, it's handled via a directive in the wrapper.
import Foundation
var country = "us"
var configFile = "/etc/openalpr/openalpr.conf"
var runtimeFiles = "/usr/local/share/openalpr/runtime_data"
let alprWrapper = OpenALPR(countryCode: country, configFile: configFile, runtimeFilesLocation: runtimeFiles)
// for demo purposes
alprWrapper.maxRecognisablePlateCount = 1
let url = URL.init(string: "http://plates.openalpr.com/h786poj.jpg")!
URLSession.shared.dataTask(with: url) { (data, response, error) in
if error != nil { fatalError(error.debugDescription) }
guard data != nil else { fatalError("Downloaded data was nil, and its not allowed in this example") }
let results = try! alprWrapper.recogniseBy(data: data!)
print("Result from downloaded IMAGE:")
print(results)
}.resume()
let results2 = try! alprWrapper.recogniseBy(filePath: "/Users/atesztoth/h786poj.jpg")
print(results2)
RunLoop.main.run()Yet only Swift Package Manager is supported. PRs are welcome.