// 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 (string.IsNullOrEmpty(login) == false && string.IsNullOrEmpty(password) == false)
{
Uri sourceUri = new Uri(source);
Uri homePage = new Uri(sourceUri.Scheme + "://" + sourceUri.Authority);
CredentialCache c = new CredentialCache();
c.Add(homePage, "Basic", new NetworkCredential(login, password));
c.Add(sourceUri, "Basic", new NetworkCredential(login, password));
if (this.authWithHomePage)
{
try
{
WebRequest r = WebRequest.Create(homePage);
r.PreAuthenticate = this.PreAuthenticate;
r.Credentials = c;
WebResponse s = r.GetResponse();
StreamReader sr = new StreamReader(s.GetResponseStream());
char[] b = new char[5000];
sr.Read(b, 0, 5000);
sr.Close();
s.Close();
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine("=============: " + ex.Message);
throw;
}
}
req.PreAuthenticate = true;
req.Credentials = c;
}
// 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)
{
System.Diagnostics.Debug.WriteLine("flushing");
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;
}
// boundary aligned
/* if ((align == 0) && (todo >= boundaryLen))
* {
* if (ByteArrayUtils.Compare(buffer, boundary, pos))
* {
* // boundary located
* align = 1;
* todo -= boundaryLen;
* pos += boundaryLen;
* }
* else
* align = 2;
* }*/
// 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 (NewFrame != null)
{
Bitmap bmp = (Bitmap)Bitmap.FromStream(new MemoryStream(buffer, start, stop - start));
// notify client
NewFrame(this, new CameraEventArgs(bmp));
// release the image
bmp.Dispose();
bmp = null;
}
// System.Diagnostics.Debug.WriteLine("found image end, size = " + (stop - start));
// 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;
}
}
}
// Thread entry point
public void WorkerThread()
{
byte[] delimiter = null;
byte[] delimiter2 = null;
byte[] boundary = null;
int boundaryLen = 0;
int delimiterLen = 0;
int delimiter2Len = 0;
int read = 0;
int todo = 0;
int total = 0;
int pos = 0;
int align = 1;
int start = 0;
int stop = 0;
ASCIIEncoding encoding;
byte[] buffer = null;
HttpWebRequest req = null;
HttpWebResponse resp = null;
// MemoryStream
Stream stream = null;
//byte[] mmsb = new byte[50000];//1024000
byte[] mmsb = new byte[100];//1024000
MemoryStream mms = new MemoryStream(mmsb);
//Bitmap bmp;
Image bmp;
string ct = "";
while (yx & mjpeg.TC.yx)
{
delimiter = null;
delimiter2 = null;
boundary = null;
boundaryLen = 0;
delimiterLen = 0;
delimiter2Len = 0;
read = 0;
todo = 0;
total = 0;
pos = 0;
align = 1; // align // 1 = searching for image start // 2 = searching for image end
start = 0;
stop = 0;
req = null;
resp = null;
stream = null;
GC.Collect();
if (IsExistC())
{
// get boundary
encoding = new ASCIIEncoding();
buffer = new byte[bufSize]; // buffer to read stream
ct = "";
mmsb = new byte[50000];
// create request
try
{
req = null;
resp = null;
lock (this)
{
// source = source + "&compression=30&resolution=2CIF&date=0";
req = (HttpWebRequest)WebRequest.Create(source);
req.Timeout = 50000; // 1000;// 50000; //已重写。获取或设置 GetResponse 和 GetRequestStream 方法的超时值。
req.ReadWriteTimeout = 20000; //1000
mms = new MemoryStream(mmsb);
Thread.Sleep(50);
//// set login and password
//if ((login != null) && (password != null) && (login != ""))
req.Credentials = new NetworkCredential("ttsj", "ttsjfc");
// get response
resp = (HttpWebResponse)req.GetResponse();
if (resp.StatusCode != HttpStatusCode.OK)
{
throw new ApplicationException("服务器响应不正确");
}
// check content type
ct = resp.ContentType;
//ct = req.ContentType;
if (ct.IndexOf("multipart/x-mixed-replace") == -1)
{
throw new ApplicationException("Invalid URL");
}
// get response stream
stream = resp.GetResponseStream();
if (ct.IndexOf("boundary=", 0) >= 0)
{
boundary = encoding.GetBytes(ct.Substring(ct.IndexOf("boundary=", 0) + 9));
}
boundaryLen = boundary.Length;
}
}
catch (Exception ex)
{
System.Diagnostics.Debug.Write(" mjpeg1:" + ex.ToString() + source);
err = ex.ToString();
if (ErrEvent != null)
{
ErrEvent(this, err);
}
if (resp != null)
{
resp.Close();
}
if (req != null)
{
req.Abort();
}
continue;
}
int cw0 = 0;
#region //x while
while (yx)
{
try
{
// check total read
if (total > bufSize - readSize)
{
total = pos = todo = 0;
}
Thread.Sleep(waitTime); //2005-11 //10 2006-4-26
read = stream.Read(buffer, total, buffer.Length - total);
if (read == 0)
{
cw0 = cw0 + 1;
}
if (cw0 > 10)
{
cw0 = 0;
break;
}
//continue;
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;
}
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;
}
}
// continue;
// 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++;
// continue;
// image at stop
if (NewFrame != null)
{
if (mmsb.Length != stop - start)
{
mmsb = new byte[stop - start];
//Array.Copy(buffer, start, mmsb, 0, stop - start);
Buffer.BlockCopy(buffer, start, mmsb, 0, stop - start);
mms = new MemoryStream(mmsb);
}
else
{
//Array.Copy(buffer, start, mmsb, 0, stop - start);
Buffer.BlockCopy(buffer, start, mmsb, 0, stop - start);
}
bmp = Image.FromStream(mms, false, false);
// notify client
NewFrame(this, bmp);
}
// shift array
pos = stop + boundaryLen;
todo = total - pos;
//Array.Copy(buffer, pos, buffer, 0, todo);
Buffer.BlockCopy(buffer, pos, buffer, 0, todo);
total = todo;
pos = 0;
align = 1;
}
else
{
// delimiter not found
todo = boundaryLen - 1;
pos = total - todo;
}
}
}
catch (Exception ex3)
{
System.Diagnostics.Debug.Write(" mjpeg2::" + ex3.ToString() + source);
err = ex3.ToString();
if (ErrEvent != null)
{
ErrEvent(this, err);
}
if (resp != null)
{
resp.Close();
}
if (req != null)
{
req.Abort();
}
break;
}
}
#endregion //xwhile
}
else
{
err = "IP地址不通";
Thread.Sleep(50);
}
} //while
} //method
