live555helper and nodejs integration - nodejs C++ Addon

[juvasquezg]

Hi,

I am creating a native module in nodejs (uses libuv event loop)

I am using live555helper live555helper.

The initial intention is to get the buffer from nodejs, however the program stays in the event loop of live555 and not run the callback that I pass to it from nodejs and the api of v8 (not return to javascript).

The program in nodejs is.

'use strict'

const addon = require('./build/Release/eas-rtsp')

addon.getBuffer((err, buffer) => {
  if (err) {
    console.log(err)
  } else {
    console.log(buffer.toString('hex'))
  }
})

// Code not reached
console.log('continue...')

The c ++ addon is:

#include <rtspconnectionclient.h>

using namespace v8;

NAN_METHOD(getBuffer) {
	Nan:: HandleScope scope;
	
	Nan::Callback *node_callback = new Nan::Callback(info[0].As<Function>());

	class RTSPCallback : public RTSPConnection::Callback
	{
	public:
		virtual bool onData(const char* id, unsigned char* buffer, ssize_t size, struct timeval presentationTime,  Nan::Callback* node_callback) {
			// std::cout << id << " " << size << " ts:" << presentationTime.tv_sec << "." << presentationTime.tv_usec << std::endl;
			v8::Local<v8::Object> node_buffer = Nan::NewBuffer((char *)buffer, size).ToLocalChecked();
			v8::Local<v8::Value> argv[] = { node_buffer };
			node_callback->Call(1, argv);
			return true;
		}
	};
  
	Environment env;
	RTSPCallback cb;
	RTSPConnection rtspClient(env, &cb, "rtsp://admin:@192.168.1.38:554/live1.sdp", node_callback);
	env.mainloop();
}


NAN_MODULE_INIT(Initialize) {
    NAN_EXPORT(target, getBuffer);
}

NODE_MODULE(addon, Initialize);

1. get Callback from node.

Nan::Callback *node_callback = new Nan::Callback(info[0].As<Function>());

2. overwrite onData of live555helper.

3. The live555 event loop starts.

env.mainloop();

The code eas-rtsp commit bb08a5e

The node program does not continue.

• Should I add the live555 event loop in another thread?

• How do I add an event type to the live555 event loop so that from the event loop of nodejs
  I will be able to read the buffer.

• Maybe use EventEmitter but I don't know.

What do you think?. It is posible?

Your opinion is very important to me.

Thank you!!!

Regards,