This example can be used to publish WebRTC stream from device screen and a separate audio stream for publishers voice
The main application view is shown below. Inputs:
Application view when screen sharing is started
A special extension process is used to capture video from screen. This pocess works until device is locked or screen cpturing is stopped manually.
To analyze the code take ScreenCapturer example version which is available on GitHub.
Classes
1. Import API code
import FPWCSApi2Swift |
2. Session creation to publish audio
WCSSession, WCSSession.connect code
The following parameters are passed to WCSSession constructor:
@IBAction func publishAudioPressed(_ sender: Any) { if (publishAudioButton.title(for: .normal) == "Publish Audio") { let options = FPWCSApi2SessionOptions() options.urlServer = self.urlField.text options.appKey = "defaultApp" do { try session = WCSSession(options) } catch { print(error) } ... session?.connect() changeViewState(publishAudioButton, false) } else { ... } } |
3. Audio publishing
WCSSession.createStream, WCSStream.publish code
The following parameters are passed to createStream method:
func onConnected(_ session:WCSSession) throws { let options = FPWCSApi2StreamOptions() options.name = publishAudioName.text options.constraints = FPWCSApi2MediaConstraints(audio: true, video: false); do { publishStream = try session.createStream(options) } catch { print(error); } ... do { try publishStream?.publish() } catch { print(error); } } |
4. Screen capturer extension parameters setup
UserDefaults.suiteName parameter must be equal to extension application group id
@objc func pickerAction() { //#WCS-3207 - Use suite name as group id in entitlements let userDefaults = UserDefaults.init(suiteName: "group.com.flashphoner.ScreenCapturerSwift") userDefaults?.set(urlField.text, forKey: "wcsUrl") userDefaults?.set(publishVideoName.text, forKey: "streamName") } |
5. Screen capturer class setup
fileprivate var capturer: ScreenRTCVideoCapturer = ScreenRTCVideoCapturer() |
6. Receiving screen capture parameters in extension code
override func broadcastStarted(withSetupInfo setupInfo: [String : NSObject]?) { //#WCS-3207 - Use suite name as group id in entitlements let userDefaults = UserDefaults.init(suiteName: "group.com.flashphoner.ScreenCapturerSwift") let wcsUrl = userDefaults?.string(forKey: "wcsUrl") if wcsUrl != self.wcsUrl || session?.getStatus() != .fpwcsSessionStatusEstablished { session?.disconnect() session = nil } self.wcsUrl = wcsUrl ?? self.wcsUrl let streamName = userDefaults?.string(forKey: "streamName") self.streamName = streamName ?? self.streamName ... } |
7. Session creation to publish screen stream
WCSSession, WCSSession.connect code
if (session == nil) { let options = FPWCSApi2SessionOptions() options.urlServer = self.wcsUrl options.appKey = "defaultApp" do { try session = WCSSession(options) } catch { print(error) } ... session?.connect() } |
8. Screen stream publishing
WCSSession.createStream, WCSStream.publish code
The following parameters are passed to createStream method:
func onConnected(_ session:WCSSession) throws { let options = FPWCSApi2StreamOptions() options.name = streamName options.constraints = FPWCSApi2MediaConstraints(audio: false, videoCapturer: capturer); try publishStream = session.createStream(options) ... try publishStream?.publish() } |