ServerMediaSession*
DynamicRTSPServer::lookupServerMediaSession(char const* streamName) {
// First, check whether the specified "streamName" exists as a local file:
FILE* fid = fopen(streamName, "rb");
Boolean fileExists = fid != NULL;
// Next, check whether we already have a "ServerMediaSession" for this file:
ServerMediaSession* sms = RTSPServer::lookupServerMediaSession(streamName);
Boolean smsExists = sms != NULL;
// Handle the four possibilities for "fileExists" and "smsExists":
if (!fileExists) {
if (smsExists) {
// "sms" was created for a file that no longer exists. Remove it:
removeServerMediaSession(sms);
}
return NULL;
} else {
if (!smsExists) {
// Create a new "ServerMediaSession" object for streaming from the named file.
sms = createNewSMS(envir(), streamName, fid);
addServerMediaSession(sms);
}
fclose(fid);
return sms;
}
}
ServerMediaSession* DynamicRTSPServer
::lookupServerMediaSession(char const* streamName, Boolean isFirstLookupInSession) {
// First, check whether the specified "streamName" exists as a local file:
FILE* fid = fopen(streamName, "rb");
Boolean fileExists = fid != NULL;
ALOGE("lookupServerMediaSession streamName: %s, %p", streamName, fid);
// Next, check whether we already have a "ServerMediaSession" for this file:
ServerMediaSession* sms = RTSPServer::lookupServerMediaSession(streamName);
Boolean smsExists = sms != NULL;
// Handle the four possibilities for "fileExists" and "smsExists":
if (!fileExists) {
if (smsExists) {
// "sms" was created for a file that no longer exists. Remove it:
removeServerMediaSession(sms);
sms = NULL;
}
if (sms == NULL) {
sms = createNewSMS(envir(), streamName, fid, mH264Pool);
addServerMediaSession(sms);
}
return sms;
} else {
if (smsExists && isFirstLookupInSession) {
// Remove the existing "ServerMediaSession" and create a new one, in case the underlying
// file has changed in some way:
removeServerMediaSession(sms);
sms = NULL;
}
if (sms == NULL) {
sms = createNewSMS(envir(), streamName, fid, mH264Pool);
addServerMediaSession(sms);
}
fclose(fid);
return sms;
}
}
void LiveRtspServer::addRtspMediaSession(const Channel& channel)
{
const std::string sSessionName = channel.ChannelName;
// Next, check whether we already have an RTSP "ServerMediaSession" for this media stream:
ServerMediaSession* sms = RTSPServer::lookupServerMediaSession(sSessionName.c_str());
Boolean bSmsExists = sms != NULL;
if (!bSmsExists)
{
VLOG(2) << "Creating Session " << sSessionName << " on RTSP server";
// Create a new "ServerMediaSession" object for streaming from the named file.
sms = createNewSMS(envir(), *this, channel, m_pFactory, m_pGlobalRateControl);
VLOG(2) << "Adding ServerMediaSession " << sSessionName;
addServerMediaSession(sms);
announceStream(this, sms, sSessionName.c_str());
}
else
{
LOG(WARNING) << "Session " << sSessionName << " already exists on RTSP server";
}
}
