/// <summary>
/// Returns a new VideoFrameSample as soon as the next one is available.
/// This method is preferable to listening to the FrameSampleAcquired event
/// in circumstances where most or all frames are not needed. For instance, if
/// you were planning on sending frames to a remote image recognition service twice per second,
/// you may consider using this method rather than ignoring most of the event dispatches from FrameSampleAcquired.
/// This will avoid the overhead of acquiring and disposing of unused frames.
///
/// If, for whatever reason, a frame reference cannot be obtained, it is possible that the callback will return a null sample.
/// </summary>
/// <param name="onFrameSampleAcquired"></param>
public void RequestNextFrameSample(FrameSampleAcquiredCallback onFrameSampleAcquired)
{
if (onFrameSampleAcquired == null)
{
throw new ArgumentNullException("onFrameSampleAcquired");
}
if (IsStreaming == false)
{
throw new Exception("You cannot request a frame sample until the video mode is started.");
}
TypedEventHandler <MediaFrameReader, MediaFrameArrivedEventArgs> handler = null;
handler = (MediaFrameReader sender, MediaFrameArrivedEventArgs args) =>
{
using (var frameReference = _frameReader.TryAcquireLatestFrame()) //frame: MediaFrameReference
{
if (frameReference != null)
{
onFrameSampleAcquired.Invoke(new VideoCaptureSample(frameReference, worldOrigin));
}
else
{
onFrameSampleAcquired.Invoke(null);
}
}
_frameReader.FrameArrived -= handler;
};
_frameReader.FrameArrived += handler;
}
public void RequestNextFrameSample(FrameSampleAcquiredCallback onFrameSampleAcquired)
{
throw new NotImplementedException();
}
