AudioVideoFlow.ConfigurationChanged Event

Reference

Definition

Namespace:: Microsoft.Rtc.Collaboration.AudioVideo

Assembly:: Microsoft.Rtc.Collaboration.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Raised by an AudioVideoFlow instance when any configuration has changed.

public:
 event EventHandler<Microsoft::Rtc::Collaboration::AudioVideo::AudioVideoFlowConfigurationChangedEventArgs ^> ^ ConfigurationChanged;

public event EventHandler<Microsoft.Rtc.Collaboration.AudioVideo.AudioVideoFlowConfigurationChangedEventArgs> ConfigurationChanged;

member this.ConfigurationChanged : EventHandler<Microsoft.Rtc.Collaboration.AudioVideo.AudioVideoFlowConfigurationChangedEventArgs>

Public Custom Event ConfigurationChanged As EventHandler(Of AudioVideoFlowConfigurationChangedEventArgs)

Event Type

EventHandler<AudioVideoFlowConfigurationChangedEventArgs>

Examples

The following example subscribes to AudioVideoFlowConfigurationRequested, and when event is received it disconnects the call if audio channel direction is different than SendReceive or Inactive.

C# Subscribing to AudioVideoFlowConfigurationRequested.


audioVideoFlow.ConfigurationChanged += delegate(object sender, AudioVideoFlowConfigurationChangedEventArgs arg)
{
    AudioVideoFlow avFlow = (AudioVideoFlow)sender;

    // check directions
    AudioChannel audioChannel = (AudioChannel)avFlow.Audio.GetChannels()[ChannelLabel.AudioMono];
    if ((audioChannel.Direction != MediaChannelDirection.SendReceive)
        &amp;&amp; (audioChannel.Direction != MediaChannelDirection.Inactive))
    {
        AudioVideoCall call = avFlow.Call;
        call.EndTerminate(call.BeginTerminate(null, null));
    }
};

Remarks

Configuration changes occur when there is a change in the media flow that causes renegotiation to occur. Such a change can be the result of actions by the AudioVideoFlow instance, actions by the remote user, or by changes in the state of the media flow.

AudioVideoFlow-related changes that can cause renegotiation:

Calls to BeginHold and EndHold (which affect HoldStatus)
Calls to BeginRetrieve and EndRetrieve (which affect HoldStatus)
Calls to BeginApplyChanges and EndApplyChanges (which affect the TonePolicy and ToneEnabled properties on the AudioVideoFlow instance; the AllowedDirection, Direction, SamplingRate, and HighPerformance properties on the associated media channel )

Changes from the remote endpoint that can cause renegotiation:

Changes to Direction property on the media channel
Changes to the ToneEnabled property on the AudioVideoFlow instance

Internal configuration changes that can cause renegotiation:

A change in the State property on the media flow (Idle to Active, Idle to Terminated, or Active to Terminated)
The remote endpoint terminated the call.
A user terminated the call.

Configuration changes that do not involve renegotiation, and so do not cause ConfigurationChanged to be raised:

Attaching or detaching a device
Muting or unmuting the audio

Applies to

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