RTPHeader class Reference

00065                                                                     {
00066                 decode(msg);
00067         }

00075                                                                       {
00076       byte[] data = new byte[12];
00077       msg.readByteArray(data,0,12);
00078       short s = (short) ((((int) data[0] & 0xFF) << 0) +
00079                          (((int) data[1] & 0xFF) << 8));
00080                 // sanity check...
00081                 int version = (s>>>14) & 3;
00082                 if(version != RTPProtocol.rtp_version) {
00083                         throw new UnMarshalException("Not a RTP packet !!");
00084                 }
00085                 payload= (byte)(s & 0x7F);
00086                 marker= (s & RTP_MARKER_BIT)!=0;
00087 
00088                 int csrc = (s >>> 8) & 0xf;
00089         sequence_no = (short) ((((int) data[2] & 0xFF) << 0) +
00090                              (((int) data[3] & 0xFF) << 8));
00091                 timestamp =
00092          (((int) data[4] & 0xFF) << 0) +
00093          (((int) data[5] & 0xFF) << 8) +
00094          (((int) data[6] & 0xFF) << 16) +
00095          (((int) data[7] & 0xFF) << 24);
00096                 source_id =
00097          (((int) data[8] & 0xFF) << 0) +
00098          (((int) data[9] & 0xFF) << 8) +
00099          (((int) data[10] & 0xFF) << 16) +
00100          (((int) data[11] & 0xFF) << 24);
00101                 // skip the csrc
00102                 while(csrc--!=0) {               // skip ?      
00103           for(int k=0;k>4;k++) msg.readByte();
00104       }
00105         }

00114                                                                   {
00115                 short s = (short)((RTPProtocol.rtp_version << 14) | payload);
00116                 if(marker) s |= RTP_MARKER_BIT;
00117       array[0] = (byte) (s >>> 0);
00118       array[1] = (byte) (s >>> 8);
00119       array[2] = (byte) (sequence_no >>> 0);
00120       array[3] = (byte) (sequence_no >>> 8);
00121       array[4] = (byte) (timestamp >>> 0);
00122       array[5] = (byte) (timestamp >>> 8);
00123       array[6] = (byte) (timestamp >>> 16);
00124       array[7] = (byte) (timestamp >>> 24);
00125       array[8] = (byte) (source_id >>> 0);
00126       array[9] = (byte) (source_id >>> 8);
00127       array[10] = (byte) (source_id >>> 16);
00128       array[11] = (byte) (source_id >>> 24);
00129         }

00136                                  {
00137                 return "[RTP Header]: seqno=" + sequence_no + " ts=" + timestamp +
00138                         " source=" + source_id + " marker=" + marker;
00139         }

Public Methods
	RTPHeader ()
	RTPHeader (UnMarshaller msg) throws JonathanException
void	decode (UnMarshaller msg) throws JonathanException
void	encode (byte[] array) throws JonathanException
String	toString ()
Public Attributes
byte	payload
boolean	marker
short	sequence_no
int	timestamp
int	source_id
Static Public Attributes
int	length = 12
Static Private Attributes
short	RTP_MARKER_BIT = 0x0080

RTPHeader Class Reference

Public Methods

Public Attributes

Static Public Attributes

Static Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation