private void SaveCurrentBitmapToFile(string filePath, ImageFormat format, bool createForensicIntegrityLog)
{
if (_ffmpegResult != null && _ffmpegResult.SourcePacket != null && _ffmpegResult.Bitmap != null)
{
_ffmpegResult.Bitmap.Save(filePath, format);
if (createForensicIntegrityLog)
{
if (_ffmpegResult.SourcePacket != null)
{
IResultNode headerSourceResult = _ffmpegResult.HeaderSource ?? _ffmpegResult.SourcePacket;
ICodecDetector codecDetector = headerSourceResult.Detectors.FirstOrDefault() as ICodecDetector;
if (codecDetector == null)
{
return;
}
// FIXME: The detectors of the video headers cannot be determined (for forensic logging purposes)!!
IDataPacket usedBitmapHeaders = codecDetector.GetVideoHeaders(headerSourceResult);
string logFileName = string.Format("{0}.csv", filePath);
using (FileStream fs = new FileStream(logFileName, FileMode.Create, FileAccess.Write, FileShare.Read))
{
IDataPacket allUsedBitmapNodes = _ffmpegResult.SourcePacket;
// Prefix with bitmap headers (if any)
if (usedBitmapHeaders != null)
{
allUsedBitmapNodes = usedBitmapHeaders.Append(allUsedBitmapNodes);
}
// Append child nodes and determine detectors that were used
var detectors = new HashSet <IDetector>(_ffmpegResult.SourcePacket.Detectors);
foreach (var dataPacket in _ffmpegResult.SourcePacket.Children)
{
allUsedBitmapNodes = allUsedBitmapNodes.Append(dataPacket);
foreach (IDetector detector in dataPacket.Detectors)
{
detectors.Add(detector);
}
}
_forensicIntegrityLog.Log(allUsedBitmapNodes, detectors, filePath, fs, ForensicLogType.ConvertedData);
}
}
else
{
MessageBox.Show("Can't save integrity log. There is no packetdata available for the active bitmap.", "Save Integrity Log", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
}
else
{
MessageBox.Show("There is no frame opened, can't save empty frame to image.", "Save Image", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
/// <summary>
/// This method reads the video Data/headers from the file and creates a buffer.
/// The buffer is added to the '_videoMemoryStreams' Dictionary so it can be used at one of the FFmpeg callback methods.
/// </summary>
/// <param name="dataPacket">Contains the frame Data.</param>
/// <param name="headerPacket">Contains the header Data, when null, dataPacket is used as headersource.</param>
/// <returns></returns>
private bool PacketDataToBuffer(IResultNode dataPacket, IResultNode headerPacket)
{
// Find current codec detector in packet
ICodecDetector codecDetector = (ICodecDetector)dataPacket.Detectors.Where(d => d is ICodecDetector).FirstOrDefault();
if (codecDetector == null)
{
return(false);
}
// Resolve frame header info
IDataPacket videoHeaders = codecDetector.GetVideoHeaders(headerPacket);
IDataPacket videoData = codecDetector.GetVideoData(dataPacket);
if (videoData == null)
{
return(false);
}
// Copy all the Data, both header- and framedata, to a buffer.
byte[] dataBuf = ReadDataPacket(videoData);
if (IsH264NalUnitResult(dataPacket))
{
// Automatically convert H.264 'NAL unit stream' to 'byte stream', because FFmpeg
// does not support the 'NAL unit stream' format.
dataBuf = ConvertH264NalUnitStreamVideoDataToByteStream(dataBuf);
}
if (videoHeaders != null)
{
byte[] headerData = ReadDataPacket(videoHeaders);
if (IsH264NalUnitResult(headerPacket))
{
// Automatically convert H.264 'NAL unit stream' to 'byte stream', because FFmpeg
// does not support the 'NAL unit stream' format.
headerData = ConvertH264NalUnitStreamHeaderDataToByteStream(headerData);
}
dataBuf = headerData.Concat(dataBuf).ToArray();
}
// Put the Data in a memory stream, used by FFmpeg to read the 'file' from memory.
lock (_videoMemoryStreams)
{
_convertId = _nextConvertId;
_nextConvertId++;
_videoMemoryStreams.Add(_convertId, new MemoryStream(dataBuf));
}
return(true);
}
private void AddKeyFramesToList(IResultNode node, KeyFrameList keyFrames)
{
if (node.IsKeyframe())
{
ICodecDetector detector = node.Detectors.Where(d => d is ICodecDetector).SingleOrDefault() as ICodecDetector;
keyFrames.Add(new KeyFrame(BuildRangeList(detector.GetVideoHeaders(node)), BuildRangeList(detector.GetVideoData(node))));
}
else
{
foreach (var childNode in node.Children)
{
AddKeyFramesToList(childNode, keyFrames);
}
}
}
public IDataPacket GetVideoHeaders(IResultNode headerPacket)
{
return(_codecDetector.GetVideoHeaders(headerPacket));
}