/// <summary>
/// Renders the video image. This method is called on a Dispatcher timer.
/// It is responsible for rendering the decoded video image continuously.
/// It also avoids rendering the same image again.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
private void RenderVideoImage(object sender, EventArgs e)
{
MediaFramesExtractedDone.Wait(Constants.FrameExtractorWaitMs);
var renderTime = RealtimeClock.PositionSeconds;
try
{
var videoFrame = VideoFramesCache.GetFrame(renderTime, false);
if (videoFrame == null || videoFrame == LastRenderedVideoFrame)
{
return;
}
if (videoFrame.PictureBufferPtr != IntPtr.Zero)
{
VideoRenderer.Lock();
Helper.NativeMethods.RtlMoveMemory(VideoRenderer.BackBuffer, videoFrame.PictureBufferPtr, videoFrame.PictureBufferLength);
VideoRenderer.AddDirtyRect(new Int32Rect(0, 0, VideoRenderer.PixelWidth, VideoRenderer.PixelHeight));
VideoRenderer.Unlock();
LastRenderedVideoFrame = videoFrame;
}
}
finally
{
this.Position = renderTime;
}
}
