RTPSource::RTPSource(UsageEnvironment& env, Groupsock* RTPgs,
unsigned char rtpPayloadFormat,
u_int32_t rtpTimestampFrequency)
: FramedSource(env),
fRTPInterface(this, RTPgs),
fCurPacketHasBeenSynchronizedUsingRTCP(False), fLastReceivedSSRC(0),
fRTPPayloadFormat(rtpPayloadFormat), fTimestampFrequency(rtpTimestampFrequency),
fSSRC(our_random32()), fEnableRTCPReports(True) {
fReceptionStatsDB = new RTPReceptionStatsDB();
}
char* SIPClient::invite(char const* url, Authenticator* authenticator) {
// First, check whether "url" contains a username:password to be used:
char* username; char* password;
if (authenticator == NULL
&& parseSIPURLUsernamePassword(url, username, password)) {
char* result = inviteWithPassword(url, username, password);
delete[] username; delete[] password; // they were dynamically allocated
return result;
}
if (!processURL(url)) return NULL;
delete[] (char*)fURL; fURL = strDup(url);
fURLSize = strlen(fURL);
fCallId = our_random32();
fFromTag = our_random32();
return invite1(authenticator);
}
RTPSink::RTPSink(UsageEnvironment& env,
Groupsock* rtpGS, unsigned char rtpPayloadType,
unsigned rtpTimestampFrequency,
char const* rtpPayloadFormatName,
unsigned numChannels)
: MediaSink(env), fRTPInterface(this, rtpGS),
fRTPPayloadType(rtpPayloadType),
fPacketCount(0), fOctetCount(0), fTotalOctetCount(0),
fTimestampFrequency(rtpTimestampFrequency), fNextTimestampHasBeenPreset(True),
fNumChannels(numChannels) {
fRTPPayloadFormatName
= strDup(rtpPayloadFormatName == NULL ? "???" : rtpPayloadFormatName);
gettimeofday(&fCreationTime, NULL);
fTotalOctetCountStartTime = fCreationTime;
fSeqNo = (u_int16_t)our_random();
fSSRC = our_random32();
fTimestampBase = our_random32();
fTransmissionStatsDB = new RTPTransmissionStatsDB(*this);
}
GenericMediaServer::ClientSession* GenericMediaServer::createNewClientSessionWithId() {
u_int32_t sessionId;
char sessionIdStr[8+1];
// Choose a random (unused) 32-bit integer for the session id
// (it will be encoded as a 8-digit hex number). (We avoid choosing session id 0,
// because that has a special use by some servers.)
do {
sessionId = (u_int32_t)our_random32(); //使用 random 方式创建一个 sessionId
snprintf(sessionIdStr, sizeof sessionIdStr, "%08X", sessionId);
} while (sessionId == 0 || lookupClientSession(sessionIdStr) != NULL);
ClientSession* clientSession = createNewClientSession(sessionId);
fClientSessions->Add(sessionIdStr, clientSession);
return clientSession;
}
Boolean DarwinInjector
::setDestination(char const* remoteRTSPServerNameOrAddress,
char const* remoteFileName,
char const* sessionName,
char const* sessionInfo,
portNumBits remoteRTSPServerPortNumber,
char const* remoteUserName,
char const* remotePassword,
char const* sessionAuthor,
char const* sessionCopyright,
int timeout) {
char* sdp = NULL;
char* url = NULL;
Boolean success = False; // until we learn otherwise
do {
// Construct a RTSP URL for the remote stream:
char const* const urlFmt = "rtsp://%s:%u/%s";
unsigned urlLen
= strlen(urlFmt) + strlen(remoteRTSPServerNameOrAddress) + 5 /* max short len */ + strlen(remoteFileName);
url = new char[urlLen];
sprintf(url, urlFmt, remoteRTSPServerNameOrAddress, remoteRTSPServerPortNumber, remoteFileName);
// Begin by creating our RTSP client object:
fRTSPClient = new RTSPClientForDarwinInjector(envir(), url, fVerbosityLevel, fApplicationName, this);
if (fRTSPClient == NULL) break;
// Get the remote RTSP server's IP address:
struct in_addr addr;
{
NetAddressList addresses(remoteRTSPServerNameOrAddress);
if (addresses.numAddresses() == 0) break;
NetAddress const* address = addresses.firstAddress();
addr.s_addr = *(unsigned*)(address->data());
}
AddressString remoteRTSPServerAddressStr(addr);
// Construct a SDP description for the session that we'll be streaming:
char const* const sdpFmt =
"v=0\r\n"
"o=- %u %u IN IP4 127.0.0.1\r\n"
"s=%s\r\n"
"i=%s\r\n"
"c=IN IP4 %s\r\n"
"t=0 0\r\n"
"a=x-qt-text-nam:%s\r\n"
"a=x-qt-text-inf:%s\r\n"
"a=x-qt-text-cmt:source application:%s\r\n"
"a=x-qt-text-aut:%s\r\n"
"a=x-qt-text-cpy:%s\r\n";
// plus, %s for each substream SDP
unsigned sdpLen = strlen(sdpFmt)
+ 20 /* max int len */ + 20 /* max int len */
+ strlen(sessionName)
+ strlen(sessionInfo)
+ strlen(remoteRTSPServerAddressStr.val())
+ strlen(sessionName)
+ strlen(sessionInfo)
+ strlen(fApplicationName)
+ strlen(sessionAuthor)
+ strlen(sessionCopyright)
+ fSubstreamSDPSizes;
unsigned const sdpSessionId = our_random32();
unsigned const sdpVersion = sdpSessionId;
sdp = new char[sdpLen];
sprintf(sdp, sdpFmt,
sdpSessionId, sdpVersion, // o= line
sessionName, // s= line
sessionInfo, // i= line
remoteRTSPServerAddressStr.val(), // c= line
sessionName, // a=x-qt-text-nam: line
sessionInfo, // a=x-qt-text-inf: line
fApplicationName, // a=x-qt-text-cmt: line
sessionAuthor, // a=x-qt-text-aut: line
sessionCopyright // a=x-qt-text-cpy: line
);
char* p = &sdp[strlen(sdp)];
SubstreamDescriptor* ss;
for (ss = fHeadSubstream; ss != NULL; ss = ss->next()) {
sprintf(p, "%s", ss->sdpLines());
p += strlen(p);
}
// Do a RTSP "ANNOUNCE" with this SDP description:
Authenticator auth;
Authenticator* authToUse = NULL;
if (remoteUserName[0] != '\0' || remotePassword[0] != '\0') {
auth.setUsernameAndPassword(remoteUserName, remotePassword);
authToUse = &auth;
}
fWatchVariable = 0;
(void)fRTSPClient->sendAnnounceCommand(sdp, genericResponseHandler, authToUse);
// Now block (but handling events) until we get a response:
envir().taskScheduler().doEventLoop(&fWatchVariable);
delete[] fResultString;
if (fResultCode != 0) break; // an error occurred with the RTSP "ANNOUNCE" command
// Next, tell the remote server to start receiving the stream from us.
// (To do this, we first create a "MediaSession" object from the SDP description.)
fSession = MediaSession::createNew(envir(), sdp);
if (fSession == NULL) break;
ss = fHeadSubstream;
MediaSubsessionIterator iter(*fSession);
MediaSubsession* subsession;
ss = fHeadSubstream;
unsigned streamChannelId = 0;
while ((subsession = iter.next()) != NULL) {
if (!subsession->initiate()) break;
fWatchVariable = 0;
(void)fRTSPClient->sendSetupCommand(*subsession, genericResponseHandler,
True /*streamOutgoing*/,
True /*streamUsingTCP*/);
// Now block (but handling events) until we get a response:
envir().taskScheduler().doEventLoop(&fWatchVariable);
delete[] fResultString;
if (fResultCode != 0) break; // an error occurred with the RTSP "SETUP" command
// Tell this subsession's RTPSink and RTCPInstance to use
// the RTSP TCP connection:
ss->rtpSink()->setStreamSocket(fRTSPClient->socketNum(), streamChannelId++);
if (ss->rtcpInstance() != NULL) {
ss->rtcpInstance()->setStreamSocket(fRTSPClient->socketNum(),
streamChannelId++);
}
ss = ss->next();
}
if (subsession != NULL) break; // an error occurred above
// Tell the RTSP server to start:
fWatchVariable = 0;
(void)fRTSPClient->sendPlayCommand(*fSession, genericResponseHandler);
// Now block (but handling events) until we get a response:
envir().taskScheduler().doEventLoop(&fWatchVariable);
delete[] fResultString;
if (fResultCode != 0) break; // an error occurred with the RTSP "PLAY" command
// Finally, make sure that the output TCP buffer is a reasonable size:
increaseSendBufferTo(envir(), fRTSPClient->socketNum(), 100*1024);
success = True;
} while (0);
delete[] sdp;
delete[] url;
return success;
}
