private void RecordScreen()
{
var frameInterval = TimeSpan.FromSeconds(1 / (double)writer.FramesPerSecond);
var buffer = new byte[screenWidth * screenHeight * 4];
#if FX45
Task videoWriteTask = null;
#else
IAsyncResult videoWriteResult = null;
#endif
var isFirstFrame = true;
var timeTillNextFrame = TimeSpan.Zero;
while (!stopThread.WaitOne(timeTillNextFrame))
{
var timestamp = DateTime.Now;
GetScreenshot(buffer);
// Wait for the previous frame is written
if (!isFirstFrame)
{
#if FX45
videoWriteTask.Wait();
#else
videoStream.EndWriteFrame(videoWriteResult);
#endif
videoFrameWritten.Set();
}
if (audioStream != null)
{
var signalled = WaitHandle.WaitAny(new WaitHandle[] { audioBlockWritten, stopThread });
if (signalled == 1)
{
break;
}
}
// Start asynchronous (encoding and) writing of the new frame
#if FX45
videoWriteTask = videoStream.WriteFrameAsync(true, buffer, 0, buffer.Length);
#else
videoWriteResult = videoStream.BeginWriteFrame(true, buffer, 0, buffer.Length, null, null);
#endif
timeTillNextFrame = timestamp + frameInterval - DateTime.Now;
if (timeTillNextFrame < TimeSpan.Zero)
{
timeTillNextFrame = TimeSpan.Zero;
}
isFirstFrame = false;
}
// Wait for the last frame is written
if (!isFirstFrame)
{
#if FX45
videoWriteTask.Wait();
#else
videoStream.EndWriteFrame(videoWriteResult);
#endif
}
}