void NdnRtcNamespace::getSegmentationNumbers(const ndn::Name &prefix,
PacketNumber &packetNumber,
SegmentNumber &segmentNumber)
{
int p = -1;
packetNumber = -1;
segmentNumber = -1;
if (isDeltaFramesPrefix(prefix))
{
p = findComponent(prefix, NameComponentStreamFramesDelta);
}
else if (isKeyFramePrefix(prefix))
{
p = findComponent(prefix, NameComponentStreamFramesKey);
}
if (p > 0)
{
if (p+1 < prefix.size())
{
Name::Component packetNoComp = prefix.get(p+1);
packetNumber = NdnRtcUtils::frameNumber(packetNoComp);
}
if (p+3 < prefix.size())
{
Name::Component segmentNoComp = prefix.get(p+3);
segmentNumber = NdnRtcUtils::segmentNumber(segmentNoComp);
}
}
}
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;
}
//******************************************************************************
bool extractMeta(const ndn::Name& name, NamespaceInfo& info)
{
// example: name == %FD%05/%00%00
if (name.size() >= 1 && name[0].isVersion())
{
info.metaVersion_ = name[0].toVersion();
if (name.size() >= 2)
{
info.segNo_ = name[1].toSegment();
info.hasSegNo_ = true;
}
else
info.hasSegNo_ = false;
return true;
}
return false;
}
/**
* @brief search a name component in ndn::Name and return the position of the component
* @param name where to search the searchString
* @param searchString the string to search in name
* @return -1 if searchString not found else return the position
* starting from 0
*/
inline static int32_t
getNameComponentPosition(const ndn::Name& name, const std::string& searchString)
{
ndn::name::Component component(searchString);
size_t nameSize = name.size();
for (uint32_t i = 0; i < nameSize; i++) {
if (component == name[i]) {
return (int32_t)i;
}
}
return -1;
}
int NdnRtcNamespace::findComponent(const ndn::Name &prefix,
const std::string &componentString)
{
int pos = -1;
int nComponents = prefix.size();
Name::Component searchComponent((const uint8_t*)componentString.c_str(),
componentString.size());
for (int i = nComponents; i--; i >= 0)
{
Name::Component c = prefix.get(i);
if (c == searchComponent)
{
pos = i;
break;
}
}
return pos;
}
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;
}
void
onInterest(const ndn::Name& name, const ndn::Interest& interest)
{
ndn::Name interestName(interest.getName());
if(DEBUG)
std::cout << "received interest: " << interest.getName() << std::endl;
//run scripts if requested by server
ndn::Name cmpName(getFilter()+SCRIPT_SUFFIX);
int num_components = cmpName.size();
if(cmpName.isPrefixOf(interestName))
{
int numberOfComponents = interestName.size();
for(int i = num_components; i < numberOfComponents; ++i)
{
m_scriptsList.push_front(interestName[i].toUri());
}
runScripts(interestName);
}
else
{
int numberOfComponents = interestName.size();
if(!m_remoteLinks.empty())
{
std::cerr << "remote links list is not empty - check for a missing reports!!" << std::endl;
m_remoteLinks.clear();
}
for(int i = name.size(); i < numberOfComponents; ++i)
{
m_remoteLinks.insert(interestName[i].toUri());
}
// ask for local status
fetchFaceStatusInformation(interestName);
}
}
SegmentNumber NdnRtcNamespace::getSegmentNumber(const ndn::Name &prefix)
{
PacketNumber segmentNo = -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())
{
Name::Component segmentNoComp = prefix.get(p+3);
segmentNo = NdnRtcUtils::segmentNumber(segmentNoComp);
}
return segmentNo;
}
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;
}