src/jlibrtp/RtcpPktAPP.java
changeset 823 2036ebfaccda
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jlibrtp/RtcpPktAPP.java	Fri Nov 20 19:29:42 2009 +0100
@@ -0,0 +1,101 @@
+/**
+ * Java RTP Library (jlibrtp)
+ * Copyright (C) 2006 Arne Kepp
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+package jlibrtp;
+
+/**
+ * Application specific RTCP packets
+ * 
+ * @author Arne Kepp
+ */
+public class RtcpPktAPP extends RtcpPkt {
+	/** Name of packet, 4 bytes ASCII */
+	protected byte[] pktName = null;
+	/** Data of packet */
+	protected byte[] pktData = null;
+
+	/**
+	 * Constructor for a new Application RTCP packet
+	 * 
+	 * @param ssrc
+	 *            the SSRC of the sender, presumably taken from RTPSession
+	 * @param subtype
+	 *            the subtype of packet, application specific
+	 * @param pktName
+	 *            byte[4] representing ASCII name of packet
+	 * @param pktData
+	 *            the byte[4x] data that represents the message itself
+	 */
+	protected RtcpPktAPP(long ssrc, int subtype, byte[] pktName, byte[] pktData) {
+		// Fetch all the right stuff from the database
+		super.ssrc = ssrc;
+		super.packetType = 204;
+		super.itemCount = subtype;
+		this.pktName = pktName;
+		this.pktData = pktData;
+	}
+
+	/**
+	 * Constructor that parses a received Application RTCP packet
+	 * 
+	 * @param aRawPkt
+	 *            the raw packet containing the date
+	 * @param start
+	 *            where in the raw packet this packet starts
+	 */
+	protected RtcpPktAPP(byte[] aRawPkt, int start) {
+		super.ssrc = StaticProcs.bytesToUIntLong(aRawPkt, 4);
+		super.rawPkt = aRawPkt;
+
+		if (!super.parseHeaders(start) || packetType != 204) {
+			if (RTPSession.rtpDebugLevel > 2) {
+				System.out
+						.println(" <-> RtcpPktAPP.parseHeaders() etc. problem");
+			}
+			super.problem = -204;
+		} else {
+			// System.out.println("super.length:  " + super.length);
+			if (super.length > 1) {
+				pktName = new byte[4];
+				System.arraycopy(aRawPkt, 8, pktName, 0, 4);
+			}
+			if (super.length > 2) {
+				pktData = new byte[(super.length + 1) * 4 - 12];
+				System.arraycopy(aRawPkt, 12, pktData, 0, pktData.length);
+			}
+		}
+	}
+
+	/**
+	 * Encode the packet into a byte[], saved in .rawPkt
+	 * 
+	 * CompRtcpPkt will call this automatically
+	 */
+	protected void encode() {
+		super.rawPkt = new byte[12 + this.pktData.length];
+		byte[] tmp = StaticProcs.uIntLongToByteWord(super.ssrc);
+		System.arraycopy(tmp, 0, super.rawPkt, 4, 4);
+		System.arraycopy(this.pktName, 0, super.rawPkt, 8, 4);
+		System
+				.arraycopy(this.pktData, 0, super.rawPkt, 12,
+						this.pktData.length);
+		writeHeaders();
+		// System.out.println("ENCODE: " + super.length + " " + rawPkt.length +
+		// " " + pktData.length);
+	}
+}