AcquireResult GetAcquireResult()
{
if (_acquireTask == null)
{
BeginAcquireFrame();
return(null);
}
_acquireTask.Wait();
lock (_acquireResultLock)
{
var val = _acquireResult;
_acquireResult = null;
return(val);
}
}
void BeginAcquireFrame()
{
const int timeout = 50;
_acquireTask = Task.Run(() =>
{
try
{
var result = _deskDupl.TryAcquireNextFrame(timeout, out var frameInfo, out var desktopResource);
if (result == ResultCode.WaitTimeout)
{
lock (_acquireResultLock)
{
_acquireResult = null;
}
BeginAcquireFrame();
}
else
{
lock (_acquireResultLock)
{
_acquireResult = new AcquireResult(result, frameInfo, desktopResource);
}
}
}
catch
{
lock (_acquireResultLock)
{
_acquireResult = new AcquireResult(Result.Fail);
}
}
});
}