This is not possible when Janus is used, as Janus only allows
broadcasting data channel messages to all the subscribers of the
publisher connection.
Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>
Data channel messages are expected to be sent only to peer connections
with "video" type, which provide the audio and video tracks of the
participant (and, in fact, peer connections for screen shares do not
even have data channels enabled in the WebUI).
Note that this could change if at some point several audio/video tracks
are sent in the same peer connection, or if "speaking" messages are
added to screen shares, but that will be addressed if/when that happens.
Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>
For now it just provides support for sending a data channel message to
all participants, so notifying all participants when the media is
toggled or the speaking status change can be directly refactored to use
it.
While it would have been fine to use a single class for both MCU and no
MCU they were split for easier and cleaner unit testing in future
stages.
Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>