/// <summary>
/// Dispose.
/// </summary>
/// <param name="disposing">
/// Disposing parameter.
/// </param>
protected virtual void Dispose(bool disposing)
{
if (!disposed)
{
if (disposing)
{
// Free other state (managed objects).
}
// Free your own state (unmanaged objects).
// Set large fields to null.
if (_searchLiveData != null)
{
_searchLiveData.Dispose();
_searchLiveData = null;
}
if (_searchLiveOverlapData != null)
{
_searchLiveOverlapData.Dispose();
_searchLiveOverlapData = null;
}
disposed = true;
}
}
private void VideoCapture1_OnVideoFrameBuffer(object sender, SampleGrabberBufferCBEventArgs e)
{
try
{
if (_stopFlag)
{
return;
}
Dispatcher.BeginInvoke(new NewFrameDelegate(NewFrameDelegateMethod), e);
if (_tempBuffer == IntPtr.Zero)
{
_tempBuffer = Marshal.AllocCoTaskMem(ImageHelper.GetStrideRGB24(e.Width) * e.Height);
}
// live
if (_searchLiveData == null)
{
_searchLiveData = new FingerprintLiveData(TimeSpan.FromMilliseconds(_fragmentDuration), DateTime.Now);
_fragmentCount++;
}
long timestamp = (long)(e.SampleTime * 1000);
if (timestamp < _fragmentDuration * _fragmentCount)
{
ImageHelper.CopyMemory(_tempBuffer, e.Buffer, e.BufferLen);
// process frame to remove ignored areas
if (_ignoredAreas.Count > 0)
{
foreach (var area in _ignoredAreas)
{
if (area.Right > e.Width || area.Bottom > e.Height)
{
continue;
}
MFP.FillColor(_tempBuffer, e.Width, e.Height, area, 0);
}
}
VFPSearch.Process(_tempBuffer, e.Width, e.Height, ImageHelper.GetStrideRGB24(e.Width), TimeSpan.FromMilliseconds(timestamp), ref _searchLiveData.Data);
}
else
{
_fingerprintQueue.Enqueue(_searchLiveData);
_searchLiveData = null;
Dispatcher.BeginInvoke(new ProcessVideoDelegate(ProcessVideoDelegateMethod));
}
// overlap
if (timestamp < _fragmentDuration / 2)
{
return;
}
if (_searchLiveOverlapData == null)
{
_searchLiveOverlapData = new FingerprintLiveData(TimeSpan.FromSeconds(_fragmentDuration), DateTime.Now);
_overlapFragmentCount++;
}
if (timestamp < _fragmentDuration * _overlapFragmentCount + _fragmentDuration / 2)
{
ImageHelper.CopyMemory(_tempBuffer, e.Buffer, e.BufferLen);
VFPSearch.Process(_tempBuffer, e.Width, e.Height, ImageHelper.GetStrideRGB24(e.Width), TimeSpan.FromMilliseconds(timestamp), ref _searchLiveOverlapData.Data);
}
else
{
_fingerprintQueue.Enqueue(_searchLiveOverlapData);
_searchLiveOverlapData = null;
Dispatcher.BeginInvoke(new ProcessVideoDelegate(ProcessVideoDelegateMethod));
}
}
catch
{
}
}
private void ProcessVideoDelegateMethod()
{
lock (_processingLock)
{
//if (VideoCapture1.Status == VFVideoCaptureStatus.Free)
//{
// return;
//}
//// done. searching for fingerprints.
//VideoCapture1.Stop();
long n;
FingerprintLiveData fingerprint = null;
if (_fingerprintQueue.TryDequeue(out fingerprint))
{
IntPtr p = VFPSearch.Build(out n, ref fingerprint.Data);
VFPFingerPrint fvp = new VFPFingerPrint()
{
Data = new byte[n],
OriginalFilename = string.Empty
};
Marshal.Copy(p, fvp.Data, 0, (int)n);
foreach (var ad in _adVFPList)
{
var positions = VFPAnalyzer.Search(ad, fvp, ad.Duration, (int)slDifference.Value, true);
if (positions.Count > 0)
{
foreach (var pos in positions)
{
DateTime tm = fingerprint.StartTime.AddMilliseconds(pos.TotalMilliseconds);
bool duplicate = false;
foreach (var detectedAd in _results)
{
long time = 0;
if (detectedAd.Timestamp > tm)
{
time = (long)(detectedAd.Timestamp - tm).TotalMilliseconds;
}
else
{
time = (long)(tm - detectedAd.Timestamp).TotalMilliseconds;
}
if (time < 1000)
{
// duplicate
duplicate = true;
break;
}
}
if (duplicate)
{
break;
}
_results.Add(new DetectedAd(tm));
resultsView.Add(
new ResultsViewModel()
{
Sample = ad.OriginalFilename,
TimeStamp = tm.ToString("HH:mm:ss.fff"),
TimeStampMS = tm - new DateTime(1970, 1, 1)
});
}
}
}
fingerprint.Data.Free();
fingerprint.Dispose();
}
}
}
