private void FrameReceived(object sender, RtpStream.FrameReceivedEventArgs ea)
{
try
{
if (firstFrame)
{
Bitmap DrawImage = new Bitmap(video_width, video_height);
EncoderParameter epQuality = new EncoderParameter(Encoder.Quality, video_quality);
// Store the quality parameter in the list of encoder parameters
EncoderParameters epParameters = new EncoderParameters(1);
epParameters.Param[0] = epQuality;
MemoryStream ms = new MemoryStream();
DrawImage.Save(ms, GetImageCodecInfo(ImageFormat.Jpeg), epParameters);
Array.Copy(ms.GetBuffer(), 0, JpegHeader, 0, offset);
firstFrame = false;
}
byte[] data = new byte[ea.Frame.Buffer.Length + offset];
Array.Copy(JpegHeader, data, JpegHeader.Length);
Array.Copy(ea.Frame.Buffer, 0, data, offset, ea.Frame.Buffer.Length);
System.IO.MemoryStream msImage = new MemoryStream(data);
VsImage img = new VsImage((Bitmap)Image.FromStream(msImage));
int index = GetIndex(ea.RtpStream.IPAddress);
if (index!= -1 && vsRtpStream[index] != null && vsRtpStream[index].FrameOut != null)
{
vsRtpStream[index].FrameOut(this, new VsImageEventArgs(img));
}
img.Dispose();
img = null;
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
// Thread entry point
public void WorkerThread()
{
byte[] buffer = new byte[bufSize]; // buffer to read stream
HttpWebRequest req = null;
WebResponse resp = null;
Stream stream = null;
Random rnd = new Random((int) DateTime.Now.Ticks);
DateTime start;
TimeSpan span;
while (true)
{
int read, total = 0;
try
{
start = DateTime.Now;
// create request
if (!preventCaching)
{
req = (HttpWebRequest) WebRequest.Create(source);
}
else
{
req = (HttpWebRequest) WebRequest.Create(source + ((source.IndexOf('?') == -1) ? '?' : '&') + "fake=" + rnd.Next().ToString());
}
// set login and password
if ((login != null) && (password != null) && (login != ""))
req.Credentials = new NetworkCredential(login, password);
// set connection group name
if (useSeparateConnectionGroup)
req.ConnectionGroupName = GetHashCode().ToString();
// get response
resp = req.GetResponse();
// get response stream
stream = resp.GetResponseStream();
// loop
while (!stopEvent.WaitOne(0, true))
{
// check total read
if (total > bufSize - readSize)
{
total = 0;
}
// read next portion from stream
if ((read = stream.Read(buffer, total, readSize)) == 0)
break;
total += read;
// increment received bytes counter
bytesReceived += read;
}
if (!stopEvent.WaitOne(0, true))
{
// increment frames counter
framesReceived++;
// image at stop
if (FrameOut != null)
{
Bitmap bmp = (Bitmap) Bitmap.FromStream(new MemoryStream(buffer, 0, total));
// notify client
VsImage img = new VsImage(bmp);
FrameOut(this, new VsImageEventArgs(img));
// release the image
img.Dispose();
img = null;
}
}
// wait for a while ?
if (frameInterval > 0)
{
// times span
span = DateTime.Now.Subtract(start);
// miliseconds to sleep
int msec = frameInterval - (int) span.TotalMilliseconds;
while ((msec > 0) && (stopEvent.WaitOne(0, true) == false))
{
// sleeping ...
Thread.Sleep((msec < 100) ? msec : 100);
msec -= 100;
}
}
}
catch (WebException ex)
{
System.Diagnostics.Debug.WriteLine("=============: " + ex.Message);
// wait for a while before the next try
Thread.Sleep(250);
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine("=============: " + ex.Message);
}
finally
{
// abort request
if (req != null)
{
req.Abort();
req = null;
}
// close response stream
if (stream != null)
{
stream.Close();
stream = null;
}
// close response
if (resp != null)
{
resp.Close();
resp = null;
}
}
// need to stop ?
if (stopEvent.WaitOne(0, true))
break;
}
}
// Thread entry point
public void WorkerThread()
{
byte[] buffer = new byte[bufSize]; // buffer to read stream
while (true)
{
// reset reload event
reloadEvent.Reset();
HttpWebRequest req = null;
WebResponse resp = null;
Stream stream = null;
byte[] delimiter = null;
byte[] delimiter2 = null;
byte[] boundary = null;
int boundaryLen, delimiterLen = 0, delimiter2Len = 0;
int read, todo = 0, total = 0, pos = 0, align = 1;
int start = 0, stop = 0;
// align
// 1 = searching for image start
// 2 = searching for image end
try
{
// create request
req = (HttpWebRequest)WebRequest.Create(source);
// set login and password
if ((login != null) && (password != null) && (login != ""))
req.Credentials = new NetworkCredential(login, password);
// set connection group name
if (useSeparateConnectionGroup)
req.ConnectionGroupName = GetHashCode().ToString();
// get response
resp = req.GetResponse();
// check content type
string ct = resp.ContentType;
if (ct.IndexOf("multipart/x-mixed-replace") == -1)
throw new ApplicationException("Invalid URL");
// get boundary
ASCIIEncoding encoding = new ASCIIEncoding();
boundary = encoding.GetBytes(ct.Substring(ct.IndexOf("boundary=", 0) + 9));
boundaryLen = boundary.Length;
// get response stream
stream = resp.GetResponseStream();
// loop
while ((!stopEvent.WaitOne(0, true)) && (!reloadEvent.WaitOne(0, true)))
{
// check total read
if (total > bufSize - readSize)
{
total = pos = todo = 0;
}
// read next portion from stream
if ((read = stream.Read(buffer, total, readSize)) == 0)
throw new ApplicationException();
total += read;
todo += read;
// increment received bytes counter
bytesReceived += read;
// does we know the delimiter ?
if (delimiter == null)
{
// find boundary
pos = ByteArrayUtils.Find(buffer, boundary, pos, todo);
if (pos == -1)
{
// was not found
todo = boundaryLen - 1;
pos = total - todo;
continue;
}
todo = total - pos;
if (todo < 2)
continue;
// check new line delimiter type
if (buffer[pos + boundaryLen] == 10)
{
delimiterLen = 2;
delimiter = new byte[2] { 10, 10 };
delimiter2Len = 1;
delimiter2 = new byte[1] { 10 };
}
else
{
delimiterLen = 4;
delimiter = new byte[4] { 13, 10, 13, 10 };
delimiter2Len = 2;
delimiter2 = new byte[2] { 13, 10 };
}
pos += boundaryLen + delimiter2Len;
todo = total - pos;
}
// search for image
if (align == 1)
{
start = ByteArrayUtils.Find(buffer, delimiter, pos, todo);
if (start != -1)
{
// found delimiter
start += delimiterLen;
pos = start;
todo = total - pos;
align = 2;
}
else
{
// delimiter not found
todo = delimiterLen - 1;
pos = total - todo;
}
}
// search for image end
while ((align == 2) && (todo >= boundaryLen))
{
stop = ByteArrayUtils.Find(buffer, boundary, pos, todo);
if (stop != -1)
{
pos = stop;
todo = total - pos;
// increment frames counter
framesReceived++;
// image at stop
if (FrameOut != null)
{
Bitmap bmp = (Bitmap)Bitmap.FromStream(new MemoryStream(buffer, start, stop - start));
VsImage img = new VsImage(bmp);
// notify client
FrameOut(this, new VsImageEventArgs(img));
// release the image
img.Dispose();
img = null;
}
// shift array
pos = stop + boundaryLen;
todo = total - pos;
Array.Copy(buffer, pos, buffer, 0, todo);
total = todo;
pos = 0;
align = 1;
}
else
{
// delimiter not found
todo = boundaryLen - 1;
pos = total - todo;
}
}
}
}
catch (WebException ex)
{
System.Diagnostics.Debug.WriteLine("=============: " + ex.Message);
// wait for a while before the next try
Thread.Sleep(250);
}
catch (ApplicationException ex)
{
System.Diagnostics.Debug.WriteLine("=============: " + ex.Message);
// wait for a while before the next try
Thread.Sleep(250);
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine("=============: " + ex.Message);
}
finally
{
// abort request
if (req != null)
{
req.Abort();
req = null;
}
// close response stream
if (stream != null)
{
stream.Close();
stream = null;
}
// close response
if (resp != null)
{
resp.Close();
resp = null;
}
}
// need to stop ?
if (stopEvent.WaitOne(0, true))
break;
}
}
// new frame
protected void OnNewFrame(Bitmap image)
{
framesReceived++;
if ((!stopEvent.WaitOne(0, true)) && (FrameOut != null))
{
VsImage img = new VsImage(image);
// notify client
FrameOut(this, new VsImageEventArgs(img));
// release the image
img.Dispose();
img = null;
}
}
// new frame
protected void OnNewFrame(Bitmap image)
{
framesReceived++;
if (FrameOut != null)
{
VsImage img = new VsImage(image);
FrameOut(this, new VsImageEventArgs(img));
img.Dispose();
img = null;
}
}
