WebRTC 2.0 Samples – Medialooks Help Center

C# Samples

WebRTC 2.0 Architecture

The main logic for establishing connections is based on channels:

IMCChannelSGN – used to control and communicate with the signaling server. It allows enumeration of current active channels and access to channel metadata.
IMCChannel – represents the actual media communication channel, which we previously referred to as a room in WebRTC 1.0.

MConnectClass - used for creating the IMChannel and IMCChannelSGN, connecting to existing channels.

Overview of WebRTCHelper

The WebRTCHelper class used in the samples encapsulates the logic required to manage bi-directional video communication using the Medialooks MConnectClass (IMConnect), IMCChannel, and IMCChannelSGN.

Samples channel establishment logic

To create an IMCChannelSGN instance, call Enum_Create on the MConnectClass. You can then enumerate existing channels. If the required channel doesn't exist, create one using Channel_Create(). If it does, use Channel_Connect() to join it.

As an example of the logic for connecting to a signaling server and joining or creating a channel, you can refer to the samples in WebRTCHelper.Connect method.

public void Connect(string URL)
{
  server.Enum_Create(URL + "_enum", "username=test_user password=12345", " ", null, out server_manager);
  channel_url = URL;
  var members = GetRoomMembers();

   if (members.Count <= 0)
   {
     current_channel = CreateChannel(channel_url);
     current_channel.OnEventSafe += new IMEventsEvent_OnEventSafeEventHandler(Current_channel_OnEventSafe);
     mode = PeerMode.server;
    }
  else
    {
     current_channel = ConnectToChannel(channel_url);
     mode = PeerMode.client;
    }
}

This logic determines the role (server/client) dynamically based on whether the channel already exists.

Sample Authentication and Security

The OnEventSafeevent handler is triggered when a remote_offer is received. You can use it for different kinds of cases; in our samples, we are using it with a class toProtectionForm validate incoming peer credentials. If authorization fails, the peer is rejected using IMAttributes.AttributesStringSet to set⁣. succeded=false.

Sample Channel Status Monitoring

GetChannelInfoDetails() retrieves runtime metrics using ChannelInfoGet:

eDataState: data stream state
eChannelMode: mode of the channel (enum reference)
eSGNState: signaling server state (enum reference)

Sample Sending and Receiving Media

SendToChannel(MFFrame) – sends a video frame to the channel using ChannelSend.
ReceiverFrameChannel() – receives frames using ChannelReceive. If mix_on_server is true, it collects and composites frames from all peers.

Sample Server-Side Frame Mixing

The mixFrames() method arranges up to 4 frames into a 2x2 grid on a 1920×1080 canvas using:

MFFactoryClass.MFFrameCreateFromMem – to allocate the background frame.
IMFFrame.MFConvert – to resize incoming frames.
MFOverlay – to place each frame on the canvas.

Sample Peer Enumeration and Metadata

GetRoomMembers() uses VTSG_EnumGetCount and VTSG_EnumGetByIndex to get metadata of connected peers through the IMCChannelSGN interface.

Connected Peers List

GetConnectedPeers() retrieves the IDs of peers currently connected using indexed property access (connected[i]::remote::id) from the channel.

Documentation References

This helper class provides a full abstraction for WebRTC 2.0 peer setup and media transmission in duplex or one-way mode using the Medialooks SDK, supporting secure connections and multi-peer mixing.

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