int NdnRtcNamespace::trimDataTypeComponent(const ndn::Name &prefix,
Name &trimmedPrefix)
{
trimmedPrefix = prefix;
if (getPacketNumber(prefix) == -1)
return -1;
int p = -1;
if (isParitySegmentPrefix(prefix))
{
p = findComponent(prefix, NameComponentFrameSegmentParity);
}
else
{
p = findComponent(prefix, NameComponentFrameSegmentData);
}
if (p > 0)
{
trimmedPrefix = prefix.getSubName(0, p);
}
return p;
}
int NdnRtcNamespace::trimSegmentNumber(const ndn::Name &prefix,
Name &trimmedPrefix)
{
trimmedPrefix = prefix;
if (getSegmentNumber(prefix) == -1)
return -1;
int p = -1;
if (isDeltaFramesPrefix(prefix))
{
p = findComponent(prefix, NameComponentStreamFramesDelta);
}
else if (isKeyFramePrefix(prefix))
{
p = findComponent(prefix, NameComponentStreamFramesKey);
}
if (p > 0 &&
p+3 < prefix.size())
{
p += 3;
trimmedPrefix = prefix.getSubName(0, p);
}
return p;
}
void VideoStreamImpl::publishManifest(ndn::Name dataName, PublishedDataPtrVector &segments)
{
Manifest m(segments);
dataName.append(NameComponents::NameComponentManifest).appendVersion(0);
PublishedDataPtrVector ss = metadataPublisher_->publish(dataName, m);
LogDebugC << (busyPublishing_ == 1 ? "⤷" : "↓")
<< " published manifest ☆ (" << dataName.getSubName(-5, 5) << ")x"
<< ss.size() << std::endl;
}
void
SyncLogicHandler::processUpdateFromSync(const ndn::Name& updateName,
uint64_t seqNo, Nlsr& pnlsr)
{
string chkString("LSA");
int32_t lasPosition = util::getNameComponentPosition(updateName, chkString);
if (lasPosition >= 0) {
ndn::Name routerName = updateName.getSubName(lasPosition + 1);
processRoutingUpdateFromSync(routerName, seqNo, pnlsr);
return;
}
}
bool
NameComponents::extractInfo(const ndn::Name& name, NamespaceInfo& info)
{
bool goodName = false;
static Name ndnrtcSubName(NameComponents::NameComponentApp);
Name subName;
int i;
for (i = name.size()-2; i > 0 && !goodName; --i)
{
subName = name.getSubName(i);
goodName = ndnrtcSubName.match(subName);
}
if (goodName)
{
info.basePrefix_ = name.getSubName(0, i+1);
if ((goodName = subName[1].isVersion()))
{
info.apiVersion_ = subName[1].toVersion();
if (subName.size() > 2 &&
(goodName = (subName[2] == Name::Component(NameComponents::NameComponentAudio) ||
subName[2] == Name::Component(NameComponents::NameComponentVideo))) )
{
info.streamType_ = (subName[2] == Name::Component(NameComponents::NameComponentAudio) ?
MediaStreamParams::MediaStreamType::MediaStreamTypeAudio :
MediaStreamParams::MediaStreamType::MediaStreamTypeVideo );
if (info.streamType_ == MediaStreamParams::MediaStreamType::MediaStreamTypeAudio)
return extractAudioStreamInfo(subName.getSubName(3), info);
else
return extractVideoStreamInfo(subName.getSubName(3), info);
}
}
}
return false;
}
bool NdnRtcNamespace::trimmedLookupPrefix(const ndn::Name &prefix,
ndn::Name &trimmedPrefix)
{
trimmedPrefix = prefix;
bool res = false;
std::string prefixString = prefix.toUri();
int n1 = prefixString.find(NameComponentUserStreams);
int n2 = prefixString.find(NameComponentStreamFrames);
int n3 = prefixString.find(NameComponentStreamFramesKey);
int n4 = prefixString.find(NameComponentStreamFramesDelta);
if (!(n1 == n2 == n3 == n4) &&
n1 >= 0 && n1 < n2 &&
(n2 < n3 || n2 < n4))
{
int p1 = prefixString.find(NameComponentFrameSegmentData);
int p2 = prefixString.find(NameComponentFrameSegmentParity);
if (!(p1 == p2))
{
int p = -1;
if (p1 == std::string::npos)
p = findComponent(prefix, NameComponentFrameSegmentParity);
else
p = findComponent(prefix, NameComponentFrameSegmentData);
trimmedPrefix = prefix.getSubName(0, p);
}
res = true;
}
return res;
}
int NdnRtcNamespace::trimPacketNumber(const ndn::Name &prefix,
Name &trimmedPrefix)
{
trimmedPrefix = prefix;
int p = -1;
if (isDeltaFramesPrefix(prefix))
{
p = findComponent(prefix, NameComponentStreamFramesDelta);
}
else if (isKeyFramePrefix(prefix))
{
p = findComponent(prefix, NameComponentStreamFramesKey);
}
if (p > 0)
{
p += 1;
trimmedPrefix = prefix.getSubName(0, p);
}
return p;
}
bool extractAudioStreamInfo(const ndn::Name& name, NamespaceInfo& info)
{
if (name.size() == 1)
{
info.streamName_ = name[0].toEscapedString();
return true;
}
if (name.size() == 2 && name[1].isTimestamp())
{
info.streamName_ = name[0].toEscapedString();
info.streamTimestamp_ = name[1].toTimestamp();
return true;
}
if (name.size() < 2)
return false;
int idx = 0;
info.streamName_ = name[idx++].toEscapedString();
info.isMeta_ = (name[idx++] == Name::Component(NameComponents::NameComponentMeta));
if (info.isMeta_)
{
info.segmentClass_ = SegmentClass::Meta;
if (name.size() < idx+1)
return false;
info.threadName_ = "";
return extractMeta(name.getSubName(idx), info);;
}
else
{
info.class_ = SampleClass::Unknown;
info.segmentClass_ = SegmentClass::Unknown;
info.streamTimestamp_ = name[idx-1].toTimestamp();
info.threadName_ = name[idx++].toEscapedString();
if (name.size() == 3)
{
info.hasSeqNo_ = false;
return true;
}
info.isMeta_ = (name[idx] == Name::Component(NameComponents::NameComponentMeta));
if (info.isMeta_)
{
info.segmentClass_ = SegmentClass::Meta;
if (name.size() > idx+1 && extractMeta(name.getSubName(idx+1), info))
return true;
return false;
}
info.isDelta_ = true;
info.class_ = SampleClass::Delta;
try
{
if (name.size() > 3)
info.sampleNo_ = (PacketNumber)name[idx++].toSequenceNumber();
info.hasSeqNo_ = true;
if (name.size() > idx)
{
if (name[idx] == Name::Component(NameComponents::NameComponentManifest))
info.segmentClass_ = SegmentClass::Manifest;
else
{
info.hasSegNo_ = true;
info.segmentClass_ = SegmentClass::Data;
info.segNo_ = name[idx].toSegment();
}
return true;
}
else
{
info.hasSegNo_ = false;
return true;
}
}
catch (std::runtime_error& e)
{
return false;
}
}
return false;
}
bool extractVideoStreamInfo(const ndn::Name& name, NamespaceInfo& info)
{
if (name.size() == 1)
{
info.streamName_ = name[0].toEscapedString();
return true;
}
if (name.size() == 2 && name[1].isTimestamp())
{
info.streamName_ = name[0].toEscapedString();
info.streamTimestamp_ = name[1].toTimestamp();
return true;
}
if (name.size() < 3)
return false;
int idx = 0;
info.streamName_ = name[idx++].toEscapedString();
info.isMeta_ = (name[idx++] == Name::Component(NameComponents::NameComponentMeta));
if (info.isMeta_)
{ // example: name == camera/_meta/%FD%05/%00%00
info.segmentClass_ = SegmentClass::Meta;
info.threadName_ = "";
return extractMeta(name.getSubName(idx), info);
}
else
{ // example: name == camera/%FC%00%00%01c_%27%DE%D6/hi/d/%FE%07/%00%00
info.class_ = SampleClass::Unknown;
info.segmentClass_ = SegmentClass::Unknown;
info.streamTimestamp_ = name[idx-1].toTimestamp();
info.threadName_ = name[idx++].toEscapedString();
if (name.size() <= idx)
return true;
info.isMeta_ = (name[idx++] == Name::Component(NameComponents::NameComponentMeta));
if (info.isMeta_)
{ // example: camera/%FC%00%00%01c_%27%DE%D6/hi/_meta/%FD%05/%00%00
info.segmentClass_ = SegmentClass::Meta;
if(name.size() > idx-1 && extractMeta(name.getSubName(idx), info))
return true;
return false;
}
if (name[idx-1] == Name::Component(NameComponents::NameComponentDelta) ||
name[idx-1] == Name::Component(NameComponents::NameComponentKey))
{
info.isDelta_ = (name[idx-1] == Name::Component(NameComponents::NameComponentDelta));
info.class_ = (info.isDelta_ ? SampleClass::Delta : SampleClass::Key);
try{
if (name.size() > idx)
info.sampleNo_ = (PacketNumber)name[idx++].toSequenceNumber();
else
{
info.hasSeqNo_ = false;
return true;
}
info.hasSeqNo_ = true;
if (name.size() > idx)
{
info.isParity_ = (name[idx] == Name::Component(NameComponents::NameComponentParity));
info.hasSegNo_ = true;
if (info.isParity_ && name.size() > idx+1)
{
info.segmentClass_ = SegmentClass::Parity;
info.segNo_ = name[idx+1].toSegment();
return true;
}
else
{
if (info.isParity_)
return false;
else
{
if (name[idx] == Name::Component(NameComponents::NameComponentManifest))
info.segmentClass_ = SegmentClass::Manifest;
else
{
info.segmentClass_ = SegmentClass::Data;
info.segNo_ = name[idx].toSegment();
}
}
return true;
}
}
else
{
info.segmentClass_ = SegmentClass::Unknown;
info.hasSegNo_ = false;
return true;
}
}
catch (std::runtime_error& e)
{
return false;
}
}
}
return false;
}