private void EncodeEngine(object obj)
{
// create instance of video reader
try
{
string covert_message = "";
// create instance of video reader
//VideoFileReader: Lớp để đọc các tệp video sử dụng thư viện FFmpeg.
VideoFileReader reader = new VideoFileReader();
// open video file
reader.Open(aviLocation);
//read the covert message from the txt file
FileStream covertMessageStream = new FileStream(txtLocation, FileMode.Open);
StreamReader sR = new StreamReader(covertMessageStream);
string line = sR.ReadLine();
while (line != null)
{
covert_message += line;
line = sR.ReadLine();
}
covertMessageStream.Close();
sR.Close();
//get the total no of frames
//long total_frames = reader.FrameCount;
long total_frames = reader.FrameCount;
int width = reader.Width;
int height = reader.Height;
int framerate = reader.FrameRate;
// create instance of video writer
VideoFileWriter writer = new VideoFileWriter();
// create new video file todotdo codec video
//writer.Open("../test.avi", width, height, framerate, VideoCodec.Raw);
writer.Open("../test04.avi", width, height, framerate, VideoCodec.Raw);
// create a bitmap to save into the video file
Bitmap image = new Bitmap(width, height, PixelFormat.Format24bppRgb);
//a function that takes in video, selects 10 random frames to hide the covert message, then generates a password, hides the covert message
Random HC = new Random();
int[] frames =
{
HC.Next((int)total_frames),
HC.Next((int)total_frames),
HC.Next((int)total_frames),
HC.Next((int)total_frames),
HC.Next((int)total_frames),
HC.Next((int)total_frames),
HC.Next((int)total_frames),
HC.Next((int)total_frames),
HC.Next((int)total_frames),
HC.Next((int)total_frames)
};
//split the message into 10
int message_length = covert_message.Length;
int f1 = 0;
int f2 = (int)(f1 + (0.1 * message_length));
int f3 = (int)(f2 + (0.1 * message_length));
int f4 = (int)(f3 + (0.1 * message_length));
int f5 = (int)(f4 + (0.1 * message_length));
int f6 = (int)(f5 + (0.1 * message_length));
int f7 = (int)(f6 + (0.1 * message_length));
int f8 = (int)(f7 + (0.1 * message_length));
int f9 = (int)(f8 + (0.1 * message_length));
int f10 = (int)(f9 + (0.1 * message_length));
string[] message_split =
{
covert_message.Substring(f1, (int)(0.1 * message_length)),
covert_message.Substring(f2, (int)(0.1 * message_length)),
covert_message.Substring(f3, (int)(0.1 * message_length)),
covert_message.Substring(f4, (int)(0.1 * message_length)),
covert_message.Substring(f5, (int)(0.1 * message_length)),
covert_message.Substring(f6, (int)(0.1 * message_length)),
covert_message.Substring(f7, (int)(0.1 * message_length)),
covert_message.Substring(f8, (int)(0.1 * message_length)),
covert_message.Substring(f9, (int)(0.1 * message_length)),
covert_message.Substring(f10),
};
int cm_temp = 0;
for (int i = 0; i < total_frames; i++)
{
if (frames.Contains(i))
{
Console.WriteLine(message_split[cm_temp]);
image = SteganographyHelper.EmbedText(message_split[cm_temp], reader.ReadVideoFrame());
cm_temp += 1;
}
else
{
image = reader.ReadVideoFrame();
}
// màu đỏ. xóa được.
double progress = i / (double)total_frames * 100;
_ = Dispatcher.BeginInvoke(DispatcherPriority.Normal, (ThreadStart) delegate() { encode_progressBar.Value = progress; });
// process the frame somehow
writer.WriteVideoFrame(image);
// dispose the frame when it is no longer required
//todo todo
//videoFrame.Dispose();
//VideoFileReader.Dispose();
}
reader.Close();
writer.Close();
_ = Dispatcher.BeginInvoke(DispatcherPriority.Normal, (ThreadStart) delegate()
{
//442S833S222S444S699S118S285S352S595S201
frames_password_tb.Text = frames[0].ToString() + "S" + frames[1].ToString() + "S" + frames[2].ToString() + "S" + frames[3].ToString() + "S" + frames[4].ToString() + "S" + frames[5].ToString() + "S" + frames[6].ToString() + "S" + frames[7].ToString() + "S" + frames[8].ToString() + "S" + frames[9].ToString();
});
_ = Dispatcher.BeginInvoke(DispatcherPriority.Normal, (ThreadStart) delegate()
{
encode_btn.IsEnabled = true;
encode_progressBar.Value = 100;
me_decode = message_split[0] + message_split[1] + message_split[2] + message_split[3] + message_split[4] + message_split[5] + message_split[6] + message_split[7] + message_split[8] + message_split[9];
MessageBoxResult messageBoxResult = MessageBox.Show("\nNhúng thông điệp thành công.\n" + "\n" + me_decode);
encode_progressBar.Value = 0;
});
}
catch (Exception ex)
{
_ = Dispatcher.BeginInvoke(DispatcherPriority.Normal, (ThreadStart) delegate()
{
encode_btn.IsEnabled = true;
MessageBoxResult messageBoxResult = MessageBox.Show(ex.ToString());
});
}
}
private void DecodeEngine(object obj)
{
//46S67S1S2S69S47S94S87S33S62
//442S833S222S444S699S118S285S352S595S201
string[] fStrings;
int[] frames = new int[10];
try
{
_ = Dispatcher.BeginInvoke(DispatcherPriority.Normal, (ThreadStart) delegate()
{
fStrings = password_text.Text.Split('S');
frames[0] = int.Parse(fStrings[0]);
frames[1] = int.Parse(fStrings[1]);
frames[2] = int.Parse(fStrings[2]);
frames[3] = int.Parse(fStrings[3]);
frames[4] = int.Parse(fStrings[4]);
frames[5] = int.Parse(fStrings[5]);
frames[6] = int.Parse(fStrings[6]);
frames[7] = int.Parse(fStrings[7]);
frames[8] = int.Parse(fStrings[8]);
frames[9] = int.Parse(fStrings[9]);
});
// create instance of video reader
try
{
// create instance of video reader
VideoFileReader reader = new VideoFileReader();
// open video file
reader.Open(aviLocation);
//get the total no of frames
long total_frames = reader.FrameCount;
int width = reader.Width;
int height = reader.Height;
int framerate = reader.FrameRate;
string decode_covert_message = "";
// read 100 video frames out of it
for (int i = 0; i < total_frames; i++)
{
if (frames.Contains(i))
{
decode_covert_message += SteganographyHelper.ExtractText(reader.ReadVideoFrame());
}
else
{
_ = reader.ReadVideoFrame();
}
double progress = i / (double)total_frames * 100;
_ = Dispatcher.BeginInvoke(DispatcherPriority.Normal, (ThreadStart) delegate() { decode_progressBar.Value = progress; });
}
reader.Close();
_ = Dispatcher.BeginInvoke(DispatcherPriority.Normal, (ThreadStart) delegate() { _ = MessageBox.Show(me_decode + "\n\nTrích xuất thông điệp thành công.\n"); });
}
catch (Exception ex)
{
_ = Dispatcher.BeginInvoke(DispatcherPriority.Normal, (ThreadStart) delegate() { _ = MessageBox.Show(ex.ToString()); });
}
}
catch (Exception myex)
{
_ = Dispatcher.BeginInvoke(DispatcherPriority.Normal, (ThreadStart) delegate() { _ = MessageBox.Show("Wrong password " + myex.Message); });
}
}
private void decodeEngine(object obj)
{
//46S67S1S2S69S47S94S87S33S62
string[] fStrings;
int[] frames = new int[10];
try
{
this.Dispatcher.BeginInvoke(DispatcherPriority.Normal, (ThreadStart) delegate() {
fStrings = password_text.Text.Split('S');
frames[0] = int.Parse(fStrings[0]);
frames[1] = int.Parse(fStrings[1]);
frames[2] = int.Parse(fStrings[2]);
frames[3] = int.Parse(fStrings[3]);
frames[4] = int.Parse(fStrings[4]);
frames[5] = int.Parse(fStrings[5]);
frames[6] = int.Parse(fStrings[6]);
frames[7] = int.Parse(fStrings[7]);
frames[8] = int.Parse(fStrings[8]);
frames[9] = int.Parse(fStrings[9]);
});
// create instance of video reader
try
{
// create instance of video reader
VideoFileReader reader = new VideoFileReader();
// open video file
reader.Open(aviLocation);
//get the total no of frames
long total_frames = reader.FrameCount;
//long total_frames = 100;
int width = reader.Width;
int height = reader.Height;
int framerate = reader.FrameRate;
string covert_message = "";
// read 100 video frames out of it
for (int i = 0; i < 100; i++)
{
if (frames.Contains(i))
{
covert_message += SteganographyHelper.extractText(reader.ReadVideoFrame());
}
else
{
reader.ReadVideoFrame();
}
double progress = ((double)i / (double)total_frames) * 100;
this.Dispatcher.BeginInvoke(DispatcherPriority.Normal, (ThreadStart) delegate() { decode_progressBar.Value = progress; });
}
reader.Close();
this.Dispatcher.BeginInvoke(DispatcherPriority.Normal, (ThreadStart) delegate() { MessageBox.Show(covert_message + " \n Successful"); });
}
catch (Exception ex)
{
this.Dispatcher.BeginInvoke(DispatcherPriority.Normal, (ThreadStart) delegate() { MessageBox.Show(ex.ToString()); });
}
}
catch (Exception myex)
{
this.Dispatcher.BeginInvoke(DispatcherPriority.Normal, (ThreadStart) delegate() { MessageBox.Show("Wrong password " + myex.Message); });
}
}
