IVSBroadcastSessionDelegate Protocol Reference


                    
                    
                    -broadcastSession:didChangeState:

Indicates that the broadcast state changed.

Declaration

Objective-C

- (void)broadcastSession:(nonnull IVSBroadcastSession *)session
          didChangeState:(IVSBroadcastSessionState)state;

Swift

func broadcastSession(_ session: IVSBroadcastSession, didChange state: IVSBroadcastSession.State)

Parameters

`session`	The `IVSBroadcastSession` that just changed state
`state`	current broadcast state


                    
                    
                    -broadcastSession:didEmitError:

Indicates that an error occurred. Errors may or may not be fatal and will be marked as such with the IVSBroadcastErrorIsFatalKey in the userInfo property of the error.

Note

In the case of a fatal error the broadcast session moves into disconnected state.

Declaration

Objective-C

- (void)broadcastSession:(nonnull IVSBroadcastSession *)session
            didEmitError:(nonnull NSError *)error;

Swift

func broadcastSession(_ session: IVSBroadcastSession, didEmitError error: Error)

Parameters

`session`	The `IVSBroadcastSession` that just emitted the error.
`error`	error emitted by the SDK.


                    
                    
                    -broadcastSession:didAddDevice:

Indicates that a device has become available.

Note

In the case of audio devices, it is possible the system has automatically rerouted audio to this device. You can check listAttachedDevices to see if the attached audio devices have changed.

Declaration

Objective-C

- (void)broadcastSession:(nonnull IVSBroadcastSession *)session
            didAddDevice:(nonnull IVSDeviceDescriptor *)descriptor;

Swift

optional func broadcastSession(_ session: IVSBroadcastSession, didAddDevice descriptor: IVSDeviceDescriptor)

Parameters

`session`	The `IVSBroadcastSession` that added the device
`descriptor`	the device’s descriptor


                    
                    
                    -broadcastSession:didRemoveDevice:

Indicates that a device has become unavailable.

Note

In the case of audio devices, it is possible the system has automatically rerouted audio from this device to another device. You can check listAttachedDevices to see if the attached audio devices have changed.

It is possible that this will not be called if a device that is not in use gets disconnected. For example, if you have attached the built-in microphone to the broadcast session, but also have a bluetooth microphone paired with the device, this may not be called if the bluetooth device disconnects. Anything impacting an attached device will result in this being called however.

Declaration

Objective-C

- (void)broadcastSession:(nonnull IVSBroadcastSession *)session
         didRemoveDevice:(nonnull IVSDeviceDescriptor *)descriptor;

Swift

optional func broadcastSession(_ session: IVSBroadcastSession, didRemoveDevice descriptor: IVSDeviceDescriptor)

Parameters

`session`	The `IVSBroadcastSession` that removed the device
`descriptor`	the device’s descriptor. This may not contain specific hardware information other than IDs.


                    
                    
                    -broadcastSession:audioStatsUpdatedWithPeak:rms:

Periodically called with audio peak and rms in dBFS. Range is -100 (silent) to 0.

Declaration

Objective-C

- (void)broadcastSession:(nonnull IVSBroadcastSession *)session
    audioStatsUpdatedWithPeak:(double)peak
                          rms:(double)rms;

Swift

optional func broadcastSession(_ session: IVSBroadcastSession, audioStatsUpdatedWithPeak peak: Double, rms: Double)

Parameters

`session`	The `IVSBroadcastSession` associated with the audio stats.
`peak`	Audio Peak over the time period
`rms`	Audio RMS over the time period


                    
                    
                    -broadcastSession:broadcastQualityChanged:

Deprecated

Use broadcastSession:transmissionStatisticsChanged: instead.

A number between 0 and 1 that represents the qualty of the stream based on bitrate minimum and maximum provided on session configuration. 0 means the stream is at the lowest possible quality, or streaming is not possible at all. 1 means the bitrate is near the maximum allowed.

@discussion If the video configuration looks like: initial bitrate = 1000 kbps minimum bitrate = 300 kbps maximum bitrate = 5,000 kbps

It will be expected that a low quality is provided to this callback initially, since the initial bitrate is much closer to the minimum allowed bitrate than the maximum. If network conditions are good the quality should improve over time towards the allowed maximum.

Declaration

Objective-C

- (void)broadcastSession:(nonnull IVSBroadcastSession *)session
    broadcastQualityChanged:(double)quality;

Swift

optional func broadcastSession(_ session: IVSBroadcastSession, broadcastQualityChanged quality: Double)

Parameters

`session`	The `IVSBroadcastSession` associated with the quality change.
`quality`	The quality of the stream


                    
                    
                    -broadcastSession:networkHealthChanged:

Deprecated

Use broadcastSession:transmissionStatisticsChanged: instead.

A number between 0 and 1 that represents the current health of the network. 0 means the network is struggling to keep up and the broadcast may be experiencing latency spikes. The SDK may also reduce the quality of the broadcast on low values in order to keep it stable, depending on the minimum allowed bitrate in the broadcast configuration. A value of 1 means the network is easily able to keep up with the current demand and the SDK will be trying to increase the broadcast quality over time, depending on the maximum allowed bitrate.

Lower values like 0.5 are not necessarily bad, it just means the network is being saturated, but it is still able to keep up.

Declaration

Objective-C

- (void)broadcastSession:(nonnull IVSBroadcastSession *)session
    networkHealthChanged:(double)health;

Swift

optional func broadcastSession(_ session: IVSBroadcastSession, networkHealthChanged health: Double)

Parameters

`session`	The `IVSBroadcastSession` that associated with the quality change.
`health`	The instantaneous health of the network


                    
                    
                    -broadcastSession:transmissionStatisticsChanged:

Periodically called with current statistics on the broadcast, such as the measured bitrate, recommended bitrate by the SDK’s adaptive bitrate algorithm, average round trip time, broadcast quality (relative to configured minimum and maximum bitrates), and network health.

Expect this callback to be triggered on the delegate quite frequently (approximately twice per second) as the measured and recommended bitrates change.

See

IVSTransmissionStatistics documentation for further information on how to interpret the metrics.

Declaration

Objective-C

- (void)broadcastSession:(nonnull IVSBroadcastSession *)session
    transmissionStatisticsChanged:
        (nonnull IVSTransmissionStatistics *)statistics;

Swift

optional func broadcastSession(_ session: IVSBroadcastSession, transmissionStatisticsChanged statistics: IVSTransmissionStatistics)

Parameters


                                statistics

The current transmission stats