Camera engine for iOS, written in Swift, above AVFoundation. :monkey:

Hey Remy. I was trying to get the new version into my project, which is developed on minimum iOS 8.0, CameraEngine requires minimum 9.2 to do pod install. Is there a way to fix this?

CameraEngine is an awesome library, I'm loving it and thanks a lot for making my life easier. It would be fantastic if you could add tap to focus function though, any chance this could be done?

Bug: The video frequently begins with a black screen.

Only start the assetWriter with a video sample. Otherwise, the output video may be missing video frames at the start of the movie. Current fix ensures that no video frames are missing.

I have following code in ViewDidLoad() and it causes app crash with error 'Can't add a nil AVCaptureInput' :

override func viewDidLoad() {

    CameraEngine.startup()

    let preview: AVCaptureVideoPreviewLayer = CameraEngine.getPreviewLayer()

    preview.frame = self.view.bounds

    self.view.layer.addSublayer(preview)

    self.view.addSubview(takePhotoButton)

    cameraFlash.setImage(noFlash, forState: .Normal)

    CameraEngine.shareInstance().flash = false

    self.view.addSubview(cameraFlash) // flash light button

    photoLibrary.setImage(album, forState: .Normal)

    self.view.addSubview(photoLibrary) // open photo album button
}

Sometimes, the preview will be black once I call engine.startSession() so I have to restart my app and then the preview will load. I would say 1/10 times this happens.

Hi I am trying to follow the Quick Start on the README.md and have a blank screen when I run the app.

import UIKit
import CameraEngine


class ViewController: UIViewController {

    let cameraEngine =  CameraEngine()

    override func viewDidLoad() {
        super.viewDidLoad()
        self.cameraEngine.startSession()

}

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    override func viewDidLayoutSubviews() {
        let layer = self.cameraEngine.previewLayer

        layer.frame = self.view.bounds
        self.view.layer.insertSublayer(layer, atIndex: 0)
        self.view.layer.masksToBounds = true


    }




}

Please refer to the code here, any help appreciated

Hi!

I am new to iOS development and am trying to add this project to Xcode manually. Whenever I add it as a library I cannot import the module CameraEngine, as it is not found?

Please explain how I can do this, Thanks!

the video captured with CameraEngine has a short delay with black screen but with audio, just for about a second.

is it ok there? maybe u can reproduce this issue.

thanks a lot.

Not sure if this is what you meant, but I added access to the capture device and added the "adjustingFocus"/"adjustingExposure"/"adjustingWhiteBalance" properties.

Hi I would like to add a focusing animation but unfortunately I can't get access to the "IsAdjustingFocus"/"isAdjustingExposure"/"isAdjustingWhiteBalance" properties of AVCaptureDevice.

Also due to lack of protected accessor in Swift I can't add access to those properties via extension. I would really appreciate access to those indicators, but in case you really oppose to adding it to your API - can you think of any solution that doesn't include managing my own fork?

Thanks!

Ever since updating to XCode8 and Swift3, I've been getting a crash in CameraEngineOutput.swift in the func configureCaptureOutput

session.addOutput(self.captureVideoOutput)

I've updated my podfile to point to the 1.0 branch and the app builds fine, but it crashes on the splash screen giving the error: Thread 4: EXC_BAD_ACCESS (code=1, address=0x50) (Note: Thread 4 is the capturesession thread)

Has anyone else been getting this? I'm at a loss as to what to do. Currently it's taking down my whole app... not just the camera tab. Everything was working great before the switch to Swift3.

Thanks.

If anyone needs Swift 4.1 version of Camera Engine it is available here

This branch also contains some code refactoring per specific project requirements, which you might find helpful for your projects as well. It allows you specify requested device outputs, such as camera and microphone and provides callback which gives you detailed information about current device access request state and an ability to send back an action to be handled.

Device access request states:

public enum DeviceAccessState {
        public enum UnableToAdd {
            case camera, microphone
        }    
        case authorized // can proceed safely
        case denied // settings changes required
        case restricted // probably restricted at parental control
        case notDetermined // choice by the user wasn't made yet
        case unableToAdd(UnableToAdd)
        case other(String)
    }

A list of actions can be applied after retrieving device access state:

public enum DeviceAccessAction {
        case settingsChangeRequired // access was denied  or restricted at parental control
        case canPerformFirstTimeDeviceAccess // access not determined, can present in-app device access description (optional) before requesting on system level
        case canProceedAccessGranted // access granted, can proceed safely
        case unexpectedError(String)
    }

Usage example:

cameraEngine.startSession(devicePermissionRequests: [.camera, .microphone],
                                  deviceAccessPermissionHandler: { result, onFinishHandlingDeviceAccessState in
            switch result {
            case .camera(.denied),
                 .camera(.restricted),
                 .camera(.unableToAdd(.camera)),
                 .camera(.unableToAdd(.microphone)),
                 .microphone(.denied),
                 .microphone(.restricted),
                 .microphone(.unableToAdd(.microphone)),
                 .microphone(.unableToAdd(.camera)):
                // print("sad :(")
                // present in-app alert that OS settings change required
                onFinishHandlingDeviceAccessState?(.settingsChangeRequired)
            case .camera(.notDetermined), .microphone(.notDetermined):
                //
                //print("ok, preparing ui for the showing permission request first time")
                //
                onFinishHandlingDeviceAccessState?(.canPerformFirstTimeDeviceAccess)
            case .camera(.authorized), .microphone(.authorized):
                onFinishHandlingDeviceAccessState?(.canProceedAccessGranted)
            case let .camera(.other(errorMessage)):
                onFinishHandlingDeviceAccessState?(.unexpectedError(errorMessage))
            case let .microphone(.other(errorMessage)):
                onFinishHandlingDeviceAccessState?(.unexpectedError(errorMessage))
            case .camera(.runningOnSimulator),
                 .microphone(.runningOnSimulator):
                print("can't use camera device when running on simulator")
            }
        })

CameraEngineSessionPreset was updated to match with the native Apple's naming: before:

public enum CameraEngineSessionPreset {
    case photo
    case high
    case medium
    case low
    case res352x288
    case res640x480
    case res1280x720
    case res1920x1080
    case res3840x2160
    case frame960x540
    case frame1280x720
    case inputPriority

After

public enum CameraEngineSessionPreset {
    case photo
    case high
    case medium
    case low
    case cif352x288
    case vga640x480
    case hd1280x720
    case hd1920x1080
    case hd4k3840x2160
    case iFrame960x540
    case iFrame1280x720
    case inputPriority

Though some things are still needs to be finished. Such as getting rid of redundancy like:

.microphone(.unableToAdd(.microphone)),
.microphone(.unableToAdd(.camera)):

I'm a bit busy at the moment with main work at another project, will try to finish this and make PR asap, when I get a chance. Feel free to message me here I you found something wrong or you want to add or change. And many thanks to @remirobert for writing and sharing this library.

is it possible to store video buffer for 5 seconds and after tap of button, it save the last 5 seconds? there can be multiple tap during camera preview. every tap, it will save the last 5 seconds.

Using the example provided, ive added the following lines to viewDidLoad()

        self.cameraEngine.metadataDetection = .barcode
        
        self.cameraEngine.blockCompletionCodeDetection = { codeObject in
            print(codeObject.stringValue)
            let valueCode = codeObject.stringValue
            let frameCode = (codeObject as AVMetadataObject).bounds
            print(frameCode)
//            self.displayLayerDetection(frame: frameCode)
        }

and am unable to detect ean13 codes. is there something else i need to do?