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Copy pathstream.cpp
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365 lines (257 loc) · 9.45 KB
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#include "stream.h"
#include <node_buffer.h>
#include <glib.h>
#include "agent.h"
#include "helper.h"
using namespace v8;
v8::Persistent<v8::Function> Stream::constructor;
// helper
const char* state_to_string(int state_) {
// to get notified if we miss a state
const NiceComponentState state = (NiceComponentState) state_;
switch(state) {
case NICE_COMPONENT_STATE_DISCONNECTED:
return "disconnected";
case NICE_COMPONENT_STATE_GATHERING:
return "gathering";
case NICE_COMPONENT_STATE_CONNECTING:
return "connecting";
case NICE_COMPONENT_STATE_CONNECTED:
return "connected";
case NICE_COMPONENT_STATE_READY:
return "ready";
case NICE_COMPONENT_STATE_FAILED:
return "failed";
case NICE_COMPONENT_STATE_LAST:
// not really a state
break;
}
return "unknown";
}
// lifecycle
void Stream::init(v8::Handle<v8::Object> exports) {
// Prepare constructor template
Local<FunctionTemplate> tpl = FunctionTemplate::New(New);
tpl->SetClassName(String::NewSymbol("NiceStream"));
tpl->InstanceTemplate()->SetInternalFieldCount(1);
// protoype
NODE_SET_PROTOTYPE_METHOD(tpl, "gatherCandidates", gatherCandidates);
NODE_SET_PROTOTYPE_METHOD(tpl, "setRemoteCredentials", setRemoteCredentials);
NODE_SET_PROTOTYPE_METHOD(tpl, "getLocalCredentials", getLocalCredentials);
NODE_SET_PROTOTYPE_METHOD(tpl, "addRemoteIceCandidate", addRemoteIceCandidate);
NODE_SET_PROTOTYPE_METHOD(tpl, "getLocalIceCandidates", getLocalIceCandidates);
NODE_SET_PROTOTYPE_METHOD(tpl, "send", send);
NODE_SET_PROTOTYPE_METHOD(tpl, "setTos", setTos);
NODE_SET_PROTOTYPE_METHOD(tpl, "close", close);
constructor = Persistent<Function>::New(tpl->GetFunction());
// export
exports->Set(String::NewSymbol("NiceStream"), constructor);
}
Stream::Stream(Handle<Object> js_agent, int stream_id, int components)
: _js_agent(Persistent<Object>::New(js_agent)), _stream_id(stream_id), _components(components) {
DEBUG("stream " << stream_id << " with " << components << " components created");
Agent *agent = node::ObjectWrap::Unwrap<Agent>(js_agent);
_nice_agent = agent->agent();
}
Stream::~Stream() {
DEBUG("stream " << _stream_id << " is dying");
Agent *agent = node::ObjectWrap::Unwrap<Agent>(_js_agent);
agent->removeStream(_stream_id);
_js_agent.Dispose();
}
// callback forwarder
void Stream::receive(int component, const char* buf, size_t size) {
HandleScope scope;
const int argc = 3;
Handle<Value> argv[argc] = {
String::New("receive"),
Integer::New(component),
node::Buffer::New(buf, size)->handle_,
};
node::MakeCallback(handle_, "emit", argc, argv);
}
void Stream::stateChanged(int component, int state) {
HandleScope scope;
if(state == NICE_COMPONENT_STATE_DISCONNECTED || state == NICE_COMPONENT_STATE_FAILED) {
_working.erase(component);
}
checkIndependence();
const int argc = 3;
Handle<Value> argv[argc] = {
String::New("stateChanged"),
Integer::New(component),
String::New(state_to_string(state)),
};
node::MakeCallback(handle_, "emit", argc, argv);
}
void Stream::gatheringDone() {
HandleScope scope;
const int argc = 2;
Handle<Value> argv[argc] = {
String::New("gatheringDone"),
getLocalIceCandidates(),
};
node::MakeCallback(handle_, "emit", argc, argv);
}
// js functions
v8::Handle<v8::Value> Stream::New(const v8::Arguments& args) {
HandleScope scope;
if (args.IsConstructCall()) {
// Invoked as constructor: `new MyObject(...)`
Stream* obj = new Stream(args[0]->ToObject(), args[1]->IntegerValue(), args[2]->IntegerValue());
obj->Wrap(args.This());
return args.This();
} else {
// Invoked as plain function `MyObject(...)`, turn into construct call.
const int argc = 1;
Local<Value> argv[1] = { argv[0] };
return scope.Close(constructor->NewInstance(argc, argv));
}
}
v8::Handle<v8::Value> Stream::gatherCandidates(const v8::Arguments& args) {
HandleScope scope;
Stream *stream = node::ObjectWrap::Unwrap<Stream>(args.This()->ToObject());
NiceAgent *nice_agent = stream->_nice_agent;
int stream_id = stream->_stream_id;
for(int i = 1; i <= stream->_components; ++i) {
stream->_working.insert(i);
}
stream->checkIndependence();
bool res = nice_agent_gather_candidates(nice_agent, stream_id);
return scope.Close(Boolean::New(res));
}
v8::Handle<v8::Value> Stream::setRemoteCredentials(const v8::Arguments& args) {
HandleScope scope;
Stream *stream = node::ObjectWrap::Unwrap<Stream>(args.This()->ToObject());
NiceAgent *nice_agent = stream->_nice_agent;
int stream_id = stream->_stream_id;
v8::String::Utf8Value ufrag(args[0]->ToString());
v8::String::Utf8Value pwd(args[1]->ToString());
DEBUG("set remote credentials on stream " << stream_id << " to " << *ufrag << " " << *pwd);
bool res = nice_agent_set_remote_credentials(nice_agent, stream_id, *ufrag, *pwd);
return scope.Close(Boolean::New(res));
}
v8::Handle<v8::Value> Stream::getLocalCredentials(const v8::Arguments& args) {
HandleScope scope;
Stream *stream = node::ObjectWrap::Unwrap<Stream>(args.This()->ToObject());
NiceAgent *nice_agent = stream->_nice_agent;
int stream_id = stream->_stream_id;
gchar *ufrag, *pwd;
nice_agent_get_local_credentials(nice_agent, stream_id, &ufrag, &pwd);
Local<Object> res = Object::New();
res->Set(String::New("ufrag"), String::New(ufrag));
res->Set(String::New("pwd"), String::New(pwd));
DEBUG("local credentials are '" << ufrag << "' and '" << pwd << "'");
g_free(ufrag);
g_free(pwd);
return scope.Close(res);
}
v8::Handle<v8::Value> Stream::addRemoteIceCandidate(const v8::Arguments& args) {
HandleScope scope;
Stream *stream = node::ObjectWrap::Unwrap<Stream>(args.This()->ToObject());
v8::String::Utf8Value sdp(args[0]->ToString());
bool res = stream->addRemoteIceCandidate(*sdp);
return scope.Close(Boolean::New(res));
}
v8::Handle<v8::Value> Stream::getLocalIceCandidates(const v8::Arguments& args) {
HandleScope scope;
Stream *stream = node::ObjectWrap::Unwrap<Stream>(args.This()->ToObject());
Handle<Value> res = stream->getLocalIceCandidates();
return scope.Close(res);
}
v8::Handle<v8::Value> Stream::send(const v8::Arguments& args) {
HandleScope scope;
Stream *stream = node::ObjectWrap::Unwrap<Stream>(args.This()->ToObject());
NiceAgent *nice_agent = stream->_nice_agent;
int stream_id = stream->_stream_id;
int component = args[0]->IntegerValue();
if(!node::Buffer::HasInstance(args[1])) {
return ThrowException(Exception::TypeError(String::New("Expected buffer")));
}
Local<Object> buffer = args[1]->ToObject();
size_t size = node::Buffer::Length(buffer);
char* buf = node::Buffer::Data(buffer);
//DEBUG("sending " << size << " bytes");
int ret = nice_agent_send(nice_agent, stream_id, component, size, buf);
return scope.Close(Integer::New(ret));
}
v8::Handle<v8::Value> Stream::setTos(const v8::Arguments& args) {
HandleScope scope;
Stream *stream = node::ObjectWrap::Unwrap<Stream>(args.This()->ToObject());
NiceAgent *nice_agent = stream->_nice_agent;
int stream_id = stream->_stream_id;
int tos = args[0]->IntegerValue();
nice_agent_set_stream_tos(nice_agent, stream_id, tos);
return scope.Close(Undefined());
}
v8::Handle<v8::Value> Stream::close(const v8::Arguments& args) {
HandleScope scope;
Stream *stream = node::ObjectWrap::Unwrap<Stream>(args.This()->ToObject());
Agent *agent = node::ObjectWrap::Unwrap<Agent>(stream->_js_agent);
int stream_id = stream->_stream_id;
bool res = agent->removeStream(stream_id);
stream->_working.clear();
stream->checkIndependence();
DEBUG("closing stream " << stream->_stream_id);
return scope.Close(Boolean::New(res));
}
// helpers
v8::Handle<v8::Value> Stream::getLocalIceCandidates() {
HandleScope scope;
Local<Array> res = Array::New();
Local<Function> push = Local<Function>::Cast(res->Get(String::New("push")));
for(int i = 1; i <= _components; ++i) {
GSList* root = nice_agent_get_local_candidates(_nice_agent, _stream_id, i);
for(GSList* it = root; it; it = g_slist_next(it)) {
auto candidate = reinterpret_cast<NiceCandidate*>(it->data);
auto str = nice_agent_generate_local_candidate_sdp(_nice_agent, candidate);
const int argc = 1;
Local<Value> argv[argc] = {
String::New(str),
};
push->Call(res, argc, argv);
g_free(str);
}
g_slist_free(root);
}
return scope.Close(res);
}
bool Stream::addRemoteIceCandidate(const char* sdp_) {
// sanitize
std::string sdp(sdp_);
DEBUG("adding candidate '" << trim(sdp) << "' to stream " << _stream_id);
size_t small_udp = sdp.find(" udp ");
if(small_udp != std::string::npos) {
sdp.replace(small_udp, 5, " UDP ");
}
// parse sdp
auto nice_candidate = nice_agent_parse_remote_candidate_sdp(_nice_agent, _stream_id, sdp.c_str());
if(nice_candidate == NULL) {
DEBUG("was unable to parse the candidate");
return false;
}
if(nice_candidate->component_id > _components) {
DEBUG("component was invalid");
return false;
}
// insert into canidate list
GSList *candidates = nice_agent_get_remote_candidates(_nice_agent, _stream_id, nice_candidate->component_id);
candidates = g_slist_append(candidates, nice_candidate);
nice_agent_set_remote_candidates(_nice_agent, _stream_id, nice_candidate->component_id, candidates);
g_slist_free(candidates);
return true;
}
void Stream::checkIndependence() {
if(_working.size() > 0) {
if(_self.IsEmpty()) {
DEBUG("stream " << _stream_id << " got independent because it has work to do");
_self = Persistent<Object>::New(handle_);
}
} else {
if(!_self.IsEmpty()) {
DEBUG("stream " << _stream_id << " lost its independence");
_self.Dispose();
_self = Persistent<Object>();
}
}
}
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