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feat: add liveness (#12)
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‎.gitignore

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.DS_Store
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/.build
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/Packages
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/*.xcodeproj
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xcuserdata/
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DerivedData/
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.swiftpm/config/registries.json
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.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
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.netrc

‎.swiftpm/xcode/package.xcworkspace/xcshareddata/IDETemplateMacros.plist

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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
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<plist version="1.0">
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<dict>
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<key>FILEHEADER</key>
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<string>
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// Copyright Amazon.com Inc. or its affiliates.
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// All Rights Reserved.
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//
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// SPDX-License-Identifier: Apache-2.0
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//</string>
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</dict>
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</plist>

‎.swiftpm/xcode/package.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
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<plist version="1.0">
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<dict>
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<key>IDEDidComputeMac32BitWarning</key>
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<true/>
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</dict>
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</plist>

‎Package.resolved

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‎Package.swift

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// swift-tools-version: 5.7
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// The swift-tools-version declares the minimum version of Swift required to build this package.
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import PackageDescription
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let package = Package(
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name: "AmplifyUILiveness",
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defaultLocalization: "en",
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platforms: [.iOS(.v14)],
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products: [
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.library(
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name: "FaceLiveness",
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targets: ["FaceLiveness"]),
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],
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dependencies: [
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.package(url: "https://github.com/aws-amplify/amplify-swift", from: "2.8.0")
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],
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targets: [
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.target(
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name: "FaceLiveness",
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dependencies: [
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.product(name: "AWSPluginsCore", package: "amplify-swift"),
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.product(name: "AWSCognitoAuthPlugin", package: "amplify-swift"),
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.product(name: "AWSPredictionsPlugin", package: "amplify-swift")
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],
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resources: [
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.process("Resources/Base.lproj"),
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.copy("Resources/face_detection_short_range.mlmodelc")
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]
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),
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.testTarget(
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name: "FaceLivenessTests",
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dependencies: ["FaceLiveness"]),
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]
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)

‎README.md

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22

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---
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# Amplify UI for SwiftUI
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# Amplify UI Liveness for SwiftUI
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[![GitHub](https://img.shields.io/github/license/aws-amplify/amplify-ui-swift)](LICENSE)
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[![GitHub](https://img.shields.io/github/license/aws-amplify/amplify-ui-swift-liveness)](LICENSE)
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[![Discord](https://img.shields.io/discord/308323056592486420?logo=discord)](https://discord.gg/jWVbPfC)
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[![Open Bugs](https://img.shields.io/github/issues/aws-amplify/amplify-ui-swift/bug?color=d73a4a&label=bugs)](https://github.com/aws-amplify/amplify-ui-swift/issues?q=is%3Aissue+is%3Aopen+label%3Abug)
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[![Feature Requests](https://img.shields.io/github/issues/aws-amplify/amplify-ui-swift/feature-request?color=ff9001&label=feature%20requests)](https://github.com/aws-amplify/amplify-ui-swift/issues?q=is%3Aissue+label%3Afeature-request+is%3Aopen)
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[![Open Bugs](https://img.shields.io/github/issues/aws-amplify/amplify-ui-swift-liveness/bug?color=d73a4a&label=bugs)](https://github.com/aws-amplify/amplify-ui-swift-liveness/issues?q=is%3Aissue+is%3Aopen+label%3Abug)
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[![Feature Requests](https://img.shields.io/github/issues/aws-amplify/amplify-ui-swift-liveness/feature-request?color=ff9001&label=feature%20requests)](https://github.com/aws-amplify/amplify-ui-swift-liveness/issues?q=is%3Aissue+label%3Afeature-request+is%3Aopen)
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Amplify UI for SwiftUI is an open-source UI library with components that are endlessly customizable, accessible, and can integrate into _any_ SwiftUI application. Amplify UI consists of:
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Amplify UI Liveness for SwiftUI provides a UI component (FaceLivenessDetector) that helps developers deter fraud and scams during face-based identity checks by validating that users are physically present in front of the camera at that moment, and not an imposter spoofing the user's face.
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1. Connected components that simplify complex cloud-connected workflows, like Authenticator.
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2. Primitive components that create consistency across Amplify UI and allow you to build complete applications that fit your brand, like Buttons and Badges.
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3. Theming capabilities that allow you to customize the appearance of Amplify UI to match your brand.
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More information on setting up and using the FaceLivenessDetector is in the [Amplify UI Face Liveness documentation](https://ui.docs.amplify.aws/swift/connected-components/liveness).
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## Contributing
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‎Sources/FaceLiveness/AV/CMSampleBuffer+Rotate.swift

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//
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// Copyright Amazon.com Inc. or its affiliates.
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// All Rights Reserved.
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//
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// SPDX-License-Identifier: Apache-2.0
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//
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import AVFoundation
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import CoreImage
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extension CMSampleBuffer {
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func rotateRightUpMirrored() -> CVPixelBuffer? {
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guard let pixelBuffer = CMSampleBufferGetImageBuffer(self) else {
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return nil
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}
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var cvPixelBufferPtr: CVPixelBuffer?
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let error = CVPixelBufferCreate(
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kCFAllocatorDefault,
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CVPixelBufferGetHeight(pixelBuffer),
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CVPixelBufferGetWidth(pixelBuffer),
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kCVPixelFormatType_420YpCbCr8BiPlanarFullRange,
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nil,
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&cvPixelBufferPtr
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)
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guard error == kCVReturnSuccess,
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let cvPixelBuffer = cvPixelBufferPtr
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else {
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return nil
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}
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let ciImage = CIImage(cvPixelBuffer: pixelBuffer)
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.oriented(.right)
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.oriented(.upMirrored)
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let context = CIContext(options: nil)
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context.render(ciImage, to: cvPixelBuffer)
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return cvPixelBuffer
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}
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}

‎Sources/FaceLiveness/AV/LivenessAVAssetWriter.swift

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//
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// Copyright Amazon.com Inc. or its affiliates.
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// All Rights Reserved.
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//
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// SPDX-License-Identifier: Apache-2.0
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//
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import AVFoundation
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final class LivenessAVAssetWriter: AVAssetWriter {
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init() {
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super.init(contentType: .mpeg4Movie)
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outputFileTypeProfile = .mpeg4CMAFCompliant
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preferredOutputSegmentInterval = CMTime(
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seconds: 1,
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preferredTimescale: 1
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)
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initialSegmentStartTime = CMTime(seconds: 0, preferredTimescale: 240)
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}
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}

‎Sources/FaceLiveness/AV/LivenessAVAssetWriterInput.swift

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//
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// Copyright Amazon.com Inc. or its affiliates.
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// All Rights Reserved.
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//
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// SPDX-License-Identifier: Apache-2.0
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//
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import AVFoundation
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fileprivate let videoWidth = 480
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fileprivate let videoHeight = 640
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fileprivate let bitRate = 1_000_000
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class LivenessAVAssetWriterInput: AVAssetWriterInput {
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init() {
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super.init(
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mediaType: .video,
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outputSettings: [
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AVVideoCodecKey: AVVideoCodecType.h264,
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AVVideoWidthKey: videoWidth,
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AVVideoHeightKey: videoHeight,
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AVVideoCompressionPropertiesKey: [AVVideoAverageBitRateKey: bitRate]
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],
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sourceFormatHint: nil
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)
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}
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}

‎Sources/FaceLiveness/AV/LivenessCaptureDevice.swift

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//
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// Copyright Amazon.com Inc. or its affiliates.
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// All Rights Reserved.
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//
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// SPDX-License-Identifier: Apache-2.0
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//
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import AVFoundation
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struct LivenessCaptureDevice {
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let avCaptureDevice: AVCaptureDevice?
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var preset: AVCaptureSession.Preset = .vga640x480
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var fps: Double = 30
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var exposure: AVCaptureDevice.ExposureMode = .continuousAutoExposure
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var whiteBalance: AVCaptureDevice.WhiteBalanceMode = .continuousAutoWhiteBalance
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var focus: AVCaptureDevice.FocusMode = .continuousAutoFocus
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func configure() throws {
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guard let avCaptureDevice else { throw LivenessCaptureSessionError.cameraUnavailable }
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try avCaptureDevice.lockForConfiguration()
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defer { avCaptureDevice.unlockForConfiguration() }
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let fps = CMTimeScale(fps)
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let frameDuration = CMTime(value: 1, timescale: fps)
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avCaptureDevice.activeVideoMinFrameDuration = frameDuration
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avCaptureDevice.activeVideoMaxFrameDuration = frameDuration
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if avCaptureDevice.isExposureModeSupported(exposure) {
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avCaptureDevice.exposureMode = exposure
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}
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if avCaptureDevice.isFocusModeSupported(focus) {
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avCaptureDevice.focusMode = focus
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}
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if avCaptureDevice.isWhiteBalanceModeSupported(whiteBalance) {
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avCaptureDevice.whiteBalanceMode = whiteBalance
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}
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}
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}

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