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/*
* JBoss, Home of Professional Open Source
* Copyright 2011, Red Hat, Inc. and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This 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 software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
/*
* 15/07/13 - Change notice:
* This file has been modified by Mobius Software Ltd.
* For more information please visit http://www.mobius.ua
*/
package ua.mobius.media.core;
import ua.mobius.media.server.impl.rtp.sdp.RTPFormat;
import ua.mobius.media.server.impl.rtp.sdp.RTPFormats;
import ua.mobius.media.server.spi.format.AudioFormat;
/**
*
* @author yulian oifa
*/
public class SdpTemplate {
private String template;
private boolean isAudioSupported;
private boolean isVideoSupported;
public SdpTemplate(RTPFormats audio, RTPFormats video) {
StringBuilder builder = new StringBuilder();
//prepare header part
writeHeader(builder);
//prepare media descriptors if required
if (audio != null && !audio.isEmpty()) {
this.isAudioSupported = true;
this.writeAudioDescriptor(builder, audio);
}
if (video != null && !video.isEmpty()) {
this.isVideoSupported = true;
this.writeVideoDescriptor(builder, video);
}
template = builder.toString();
}
private void writeHeader(StringBuilder builder) {
builder.append("v=0\n");
builder.append("o=- %s 1 IN IP4 %s\n");
builder.append("s=Sipme Media Server \n");
builder.append("c=%s %s %s\n");
builder.append("t=0 0\n");
}
private void writeAudioDescriptor(StringBuilder builder, RTPFormats formats) {
builder.append("m=audio %s RTP/AVP ");
builder.append(payloads(formats));
builder.append("\n");
formats.rewind();
while (formats.hasMore()) {
RTPFormat f = formats.next();
String rtpmap = null;
AudioFormat fmt = (AudioFormat) f.getFormat();
if (fmt.getChannels() == 1) {
rtpmap = String.format("a=rtpmap:%d %s/%d\n", f.getID(), fmt.getName(), f.getClockRate());
} else {
rtpmap = String.format("a=rtpmap:%d %s/%d/%d\n", f.getID(), fmt.getName(), f.getClockRate(), fmt.getChannels());
}
builder.append(rtpmap);
if (f.getFormat().getOptions() != null) {
builder.append(String.format("a=fmtp:%d %s\n", f.getID(), f.getFormat().getOptions()));
}
if(f.getFormat().shouldSendPTime())
builder.append("a=ptime:20\n");
}
}
private void writeVideoDescriptor(StringBuilder builder, RTPFormats formats) {
builder.append("m=video %s RTP/AVP ");
builder.append(payloads(formats));
builder.append("\n");
formats.rewind();
while(formats.hasMore()) {
RTPFormat f = formats.next();
builder.append(String.format("a=rtpmap:%d %s/%d\n", f.getID(), f.getFormat().getName(), f.getClockRate()));
if (f.getFormat().getOptions() != null) {
builder.append(String.format("a=fmtp: %d %s\n", f.getID(), f.getFormat().getOptions().toString()));
}
}
}
/**
* List of payloads.
*
* @param formats the RTP format objects.
* @return the string which with payload numbers
*/
private String payloads(RTPFormats formats) {
StringBuilder builder = new StringBuilder();
formats.rewind();
while (formats.hasMore()) {
RTPFormat f = formats.next();
builder.append(f.getID());
builder.append(" ");
}
return builder.toString().trim();
}
public String getSDP(String bindAddress, String netwType, String addressType, String address, int audioPort, int videoPort) {
if (this.isAudioSupported && !this.isVideoSupported) {
return String.format(template, System.currentTimeMillis(), bindAddress, netwType, addressType, address, audioPort);
} else if (!this.isAudioSupported && this.isVideoSupported) {
return String.format(template, System.currentTimeMillis(), bindAddress, netwType, addressType, address, videoPort);
} else if (this.isAudioSupported && this.isVideoSupported) {
return String.format(template, System.currentTimeMillis(), bindAddress, netwType, addressType, address, audioPort, videoPort);
}
return String.format(template, System.currentTimeMillis(), bindAddress, netwType, addressType, address);
}
}
