public Task <IList <MediaStreamTrack> > GetUserMedia(RTCMediaStreamConstraints mediaStreamConstraints)
{
return(Task.Run(() =>
{
var constraints = Helper.MakeConstraints(mediaStreamConstraints.audioEnabled, null,
MediaDeviceKind.AudioInput, _audioCaptureDevice);
constraints = Helper.MakeConstraints(mediaStreamConstraints.videoEnabled, constraints,
MediaDeviceKind.VideoInput, _videoDevice);
if (constraints.Video != null && constraints.Video.Advanced.Count > 0)
{
MediaTrackConstraintSet constraintSet = constraints.Video.Advanced.First();
constraintSet.Width = new ConstrainLong {
Value = _preferredFrameWidth
};
constraintSet.Height = new ConstrainLong {
Value = _preferredFrameHeight
};
constraintSet.FrameRate = new ConstrainDouble {
Value = _preferredFPS
};
}
Task <IList <MediaStreamTrack> > task = MediaDevices.GetUserMedia(constraints).AsTask();
return task.Result;
}));
}
public static MediaStreamConstraints MakeConstraints(
bool shouldDoThis,
MediaStreamConstraints existingConstraints,
MediaDeviceKind kind,
MediaDevice device
)
{
if (!shouldDoThis)
{
return(existingConstraints);
}
if (null == device)
{
return(existingConstraints);
}
if (null == existingConstraints)
{
existingConstraints = new MediaStreamConstraints();
}
IMediaTrackConstraints trackConstraints = null;
switch (kind)
{
case MediaDeviceKind.AudioInput:
trackConstraints = existingConstraints.Audio;
break;
case MediaDeviceKind.AudioOutput:
trackConstraints = existingConstraints.Audio;
break;
case MediaDeviceKind.VideoInput:
trackConstraints = existingConstraints.Video;
break;
}
if (null == trackConstraints)
{
trackConstraints = new MediaTrackConstraints();
}
var newAdvancedList = new List <MediaTrackConstraintSet>();
if (null == trackConstraints.Advanced)
{
trackConstraints.Advanced = newAdvancedList;
}
var constraintSet = new MediaTrackConstraintSet
{
DeviceId = new ConstrainString
{
Parameters = new ConstrainStringParameters
{
Exact = new StringOrStringList {
Value = device.Id
}
},
Value = new StringOrStringList {
Value = device.Id
}
}
};
newAdvancedList.Add(constraintSet);
trackConstraints.Advanced = newAdvancedList;
switch (kind)
{
case MediaDeviceKind.AudioInput:
existingConstraints.Audio = trackConstraints;
break;
case MediaDeviceKind.AudioOutput:
existingConstraints.Audio = trackConstraints;
break;
case MediaDeviceKind.VideoInput:
existingConstraints.Video = trackConstraints;
break;
}
return(existingConstraints);
}
