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/**********
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. (See <http://www.gnu.org/copyleft/lesser.html>.)
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.,
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
**********/
// "liveMedia"
// Copyright (c) 1996-2005 Live Networks, Inc. All rights reserved.
// A 'ServerMediaSubsession' object that represents an existing
// 'RTPSink', rather than one that creates new 'RTPSink's on demand.
// Implementation
#include "PassiveServerMediaSubsession.hh"
#include <GroupsockHelper.hh>
////////// PassiveServerMediaSubsession //////////
PassiveServerMediaSubsession*
PassiveServerMediaSubsession::createNew(RTPSink& rtpSink,
RTCPInstance* rtcpInstance) {
return new PassiveServerMediaSubsession(rtpSink, rtcpInstance);
}
PassiveServerMediaSubsession
::PassiveServerMediaSubsession(RTPSink& rtpSink, RTCPInstance* rtcpInstance)
: ServerMediaSubsession(rtpSink.envir()),
fRTPSink(rtpSink), fRTCPInstance(rtcpInstance), fSDPLines(NULL) {
}
char const*
PassiveServerMediaSubsession::sdpLines() {
if (fSDPLines == NULL ) {
// Construct a set of SDP lines that describe this subsession:
// Use the components from "rtpSink":
Groupsock const& gs = fRTPSink.groupsockBeingUsed();
struct in_addr const& ipAddress = gs.groupAddress();
unsigned short portNum = ntohs(gs.port().num());
unsigned char ttl = gs.ttl();
unsigned char rtpPayloadType = fRTPSink.rtpPayloadType();
char const* mediaType = fRTPSink.sdpMediaType();
char* rtpmapLine = fRTPSink.rtpmapLine();
char const* rangeLine = rangeSDPLine();
char const* auxSDPLine = fRTPSink.auxSDPLine();
if (auxSDPLine == NULL) auxSDPLine = "";
char* const ipAddressStr = strDup(our_inet_ntoa(ipAddress));
char const* const sdpFmt =
"m=%s %d RTP/AVP %d\r\n"
"c=IN IP4 %s/%d\r\n"
"%s"
"%s"
"%s"
"a=control:%s\r\n";
unsigned sdpFmtSize = strlen(sdpFmt)
+ strlen(mediaType) + 5 /* max short len */ + 3 /* max char len */
+ strlen(ipAddressStr) + 3 /* max char len */
+ strlen(rtpmapLine)
+ strlen(rangeLine)
+ strlen(auxSDPLine)
+ strlen(trackId());
char* sdpLines = new char[sdpFmtSize];
sprintf(sdpLines, sdpFmt,
mediaType, // m= <media>
portNum, // m= <port>
rtpPayloadType, // m= <fmt list>
ipAddressStr, // c= <connection address>
ttl, // c= TTL
rtpmapLine, // a=rtpmap:... (if present)
rangeLine, // a=range:... (if present)
auxSDPLine, // optional extra SDP line
trackId()); // a=control:<track-id>
delete[] ipAddressStr; delete[] (char*)rangeLine; delete[] rtpmapLine;
fSDPLines = strDup(sdpLines);
delete[] sdpLines;
}
return fSDPLines;
}
void PassiveServerMediaSubsession
::getStreamParameters(unsigned /*clientSessionId*/,
netAddressBits /*clientAddress*/,
Port const& /*clientRTPPort*/,
Port const& /*clientRTCPPort*/,
int /*tcpSocketNum*/,
unsigned char /*rtpChannelId*/,
unsigned char /*rtcpChannelId*/,
netAddressBits& destinationAddress,
u_int8_t& destinationTTL,
Boolean& isMulticast,
Port& serverRTPPort,
Port& serverRTCPPort,
void*& streamToken) {
isMulticast = True;
Groupsock& gs = fRTPSink.groupsockBeingUsed();
if (destinationTTL == 255) destinationTTL = gs.ttl();
if (destinationAddress == 0) { // normal case
destinationAddress = gs.groupAddress().s_addr;
} else { // use the client-specified destination address instead:
struct in_addr destinationAddr; destinationAddr.s_addr = destinationAddress;
gs.changeDestinationParameters(destinationAddr, 0, destinationTTL);
if (fRTCPInstance != NULL) {
Groupsock* rtcpGS = fRTCPInstance->RTCPgs();
rtcpGS->changeDestinationParameters(destinationAddr, 0, destinationTTL);
}
}
serverRTPPort = gs.port();
if (fRTCPInstance != NULL) {
Groupsock* rtcpGS = fRTCPInstance->RTCPgs();
serverRTCPPort = rtcpGS->port();
}
streamToken = NULL; // not used
}
void PassiveServerMediaSubsession::startStream(unsigned /*clientSessionId*/,
void* /*streamToken*/,
TaskFunc* /*rtcpRRHandler*/,
void* /*rtcpRRHandlerClientData*/,
unsigned short& rtpSeqNum,
unsigned& rtpTimestamp) {
// Note: We don't set a RTCP RR handler, because (i) we're called potentially
// many times on the same "RTCPInstance", and (ii) the "RTCPInstance" remains
// in existence after "stopStream()" is called.
rtpSeqNum = fRTPSink.currentSeqNo();
rtpTimestamp = fRTPSink.currentTimestamp();
}
PassiveServerMediaSubsession::~PassiveServerMediaSubsession() {
delete[] fSDPLines;
}
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