react-native-vision-camera/package/example/ios/Frame Processor Plugins/Example Swift Plugin/ExampleSwiftFrameProcessor.swift

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//
// ExampleSwiftFrameProcessor.swift
// VisionCameraExample
//
// Created by Mateusz Medrek on 02/10/2023.
//
#if VISION_CAMERA_ENABLE_FRAME_PROCESSORS
import VisionCamera
// Example for a Swift Frame Processor plugin
@objc(ExampleSwiftFrameProcessorPlugin)
public class ExampleSwiftFrameProcessorPlugin: FrameProcessorPlugin {
public override func callback(_ frame: Frame, withArguments arguments: [AnyHashable: Any]?) -> Any? {
let imageBuffer = CMSampleBufferGetImageBuffer(frame.buffer)
if let arguments, let imageBuffer {
let width = CVPixelBufferGetWidth(imageBuffer)
let height = CVPixelBufferGetHeight(imageBuffer)
let count = arguments.count
print(
"ExampleSwiftPlugin: \(width) x \(height) Image. Logging \(count) parameters:"
)
for key in arguments.keys {
let value = arguments[key]
let valueString = String(describing: value)
let valueClassString = String(describing: value.self)
print("ExampleSwiftPlugin: -> \(valueString) (\(valueClassString))")
}
}
return [
"example_str": "SwiftTest",
"example_bool": false,
"example_double": 6.7,
"example_array": ["Good bye", false, 21.37]
]
}
}
#endif