SDK for VOPlayer

This article details how to integrate CDN Mesh Delivery into your mobile app using Viaccess-Orca VOPlayer.

Project setup

CocoaPods

To integrate StreamrootSDK into your Xcode project using CocoaPods, specify this in your Podfile:

use_frameworks!
target ' <Your Target Name >'
  pod 'StreamrootSDK', '~> 3.23.0'
end

Then, run the following command:

$ pod update

Finally, open the generated Workspace.

Carthage

Add the dependencies to the Cartfile:

binary "https://sdk.streamroot.io/ios/StreamrootSDK.json" ~> 3.23.0
github "daltoniam/Starscream" ~> 3.1.0
github "getsentry/sentry-cocoa" ~> 4.4.0
github "apple/swift-protobuf" ~> 1.6.0

Link the frameworks to your project:

Manually

1. Install dependencies

• daltoniam/Starscream
• getsentry/sentry-cocoa
• apple/swift-protobuf

Current dependencies versions can be found here.

2. Downloads Streamroot SDK

StreamrootSDK.framework: https://sdk.streamroot.io/ios/StreamrootSDK/3.22.0/StreamrootSDK.framework.zip

Copy script: http://sdk.streamroot.io/ios/copy_streamroot_sdk

3. Add StreamrootSDK.framework to your project

4. Link Binary With Libraries

Drag and drop StreamrootSDK.framework into your Xcode project. Make sure StreamrootSDK.framework has been added to your target's build phases under Link Binary With Libraries.

5. Copy the framework

There is no need for the script if using ARM version.

Create a new build phase (New Run Script Phase) to call the copy_streamroot_sdk script.

Add the folder containing the StreamrootSDK.framework in the Input Files field. It defaults to $(SRCROOT)/ if none input file is set.

Notes: Make sure to have all the dependencies installed in your project (ref above);

For Objective-C projects, set Always Embed Swift Standard Libraries to yes in your target's build settings.

Integrate Streamroot SDK

1. Import the SDK

import StreamrootSDK

2. Set the streamrootKey

In the Project Navigator, right click on the main target "Info.plist", and "Open as" → "Source Code".

Add the following lines with the values of the right parameters:

<key>Streamroot</key>
<dict>
  <key>Key</key>
  <string>streamrootKey</string>
</dict>

Here, <streamrootKey> refers to your Streamroot key that you will find in the Account section of the Streamroot Dashboard. If you don't have a Streamroot Key, you can register for a free trial account on our website.

3. Declare the Mesh Delivery Client as an Instance Variable

var dnaClient: DNAClient?

4. Build and start the Mesh Delivery Client

do {
    let playerInteractor = VOPlayerInteractor(self.voPlayer)
    
    dnaClient = try DNAClient.builder()
        .dnaClientDelegate(playerInteractor)
        .latency(30)
        .streamrootKey(<#streamrootKey#>)
        .start(manifestUrl)
} catch let error {
    print("\(error)")
}

Other DNA options can be called in the builder. Please refer to this article to learn more about them.

5. Play the stream

if let localPath = self.dnaClient?.manifestLocalURLPath {
    voPlayer!.contentURL = URL(string: localPath)
} else {
    voPlayer!.contentURL = contentURL
}
  
 voPlayer!.prepareToPlay()

localUrl refers to the HLS .m3u8 master playlist URL that will be passed to the player. 

6. Implement DNAClientDelegate

class VOPlayerInteractor: DNAClientDelegate {
    private let player: VOPlayer
    
    public init(_ player: VOPlayer) {
        self.player = player
    }

    func playbackTime() -> Double {
        return player.currentPlaybackTimeAbsolute
    }

    func loadedTimeRanges() -> [NSValue] {
        let seekableRange = player.httpStreamingSeekableRange
        let range = TimeRange(start: Double(seekableRange.lowerBound), duration: Double(seekableRange.upperBound - seekableRange.lowerBound))
        
        return [NSValue(timeRange: range)]
    }

    func updatePeakBitRate(_ bitRate: Double) {
        player.httpStreamingMaximumBitrate = Int(bitRate)
    }
  
    public func bufferTarget() -> Double {
        return Double(player.getCurrentBufferLevel)
    }
  
    public func setBufferTarget(_ target: Double) { }
}

7. Integrate the QoS module (optional)

This QoS module will allow you to link VOPlayer events to our SDK in order to get accurate metrics regarding the client session.

If this QoS module isn't implemented, a default module directly embedded in the SDK will be used instead.

class VOQosModuleWrapper: NSObject, VOPlayerObserver {

    let dnaQoSModule: QosModule = DNAQos.module(type: .custom)
    private let player: VOPlayer
  
    public init(_ player: VOPlayer) {
        self.player = player
        super.init()
        player.add(self)
    }
  
    func onPlayerEvent(_ event: VOPlayerEvent!) {
        let type = event.type
        switch type {
        case .bufferingIndicationDidChangeNotification:
            self.dnaQoSModule.playerStateDidChange(PlaybackState.buffering)
        case .playbackDidFailNotification:
            self.dnaQoSModule.playbackErrorOccurred()
        case .playbackDidFinishNotification:
            self.dnaQoSModule.playerStateDidChange(PlaybackState.ended)
        case .seekCompleteNotification:
            self.dnaQoSModule.playerStateDidChange(PlaybackState.seeking)
            fallthrough
        default:
            if player.isPlaying {
                self.dnaQoSModule.playerStateDidChange(PlaybackState.playing)
                break
            }
        }
    }
  
    deinit {
        player.remove(self)
    }
  
}

It is then required to call the QosModule in the builder.

do {
    let playerInteractor = VOPlayerInteractor(self.voPlayer)
    let qosModuleWrapper = VOQosModuleWrapper(self.voPlayer)

    dnaClient = try DNAClient.builder()
        .dnaClientDelegate(playerInteractor)
        .qosModule(qosModuleWrapper)
        .start(manifestUrl)
} catch let error {
    print("\(error)")
}

Stop the SDK

override func viewDidDisappear(_ animated: Bool) {
    dnaClient?.stop()
}

Disable App Transport security

In the Project Navigator, right click on "Info.plist", and "Open as" → "Source Code".

Add the following lines with the corresponding parameters values.

<key>NSAppTransportSecurity</key>
<dict> 
    <key>NSAllowsArbitraryLoads</key>
    <true/>
</dict>