@Override
public void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception {
JsonObject jsonMessage = gson.fromJson(message.getPayload(), JsonObject.class);
log.debug("Incoming message: {}", jsonMessage);
switch (jsonMessage.get("id").getAsString()) {
case "start":
start(session, jsonMessage);
break;
case "show_mouths":
setVisualization(session, jsonMessage);
break;
case "scale_factor":
log.debug("Case scale factor");
setScaleFactor(session, jsonMessage);
break;
case "process_num_frames":
log.debug("Case process num frames");
setProcessNumberFrames(session, jsonMessage);
break;
case "width_to_process":
log.debug("Case width to process");
setWidthToProcess(session, jsonMessage);
break;
case "stop":
{
UserSession user = users.remove(session.getId());
if (user != null) {
user.release();
}
break;
}
case "onIceCandidate":
{
JsonObject candidate = jsonMessage.get("candidate").getAsJsonObject();
UserSession user = users.get(session.getId());
if (user != null) {
IceCandidate cand =
new IceCandidate(
candidate.get("candidate").getAsString(),
candidate.get("sdpMid").getAsString(),
candidate.get("sdpMLineIndex").getAsInt());
user.addCandidate(cand);
}
break;
}
default:
sendError(session, "Invalid message with id " + jsonMessage.get("id").getAsString());
break;
}
}
private void start(final WebSocketSession session, JsonObject jsonMessage) {
try {
// Media Logic (Media Pipeline and Elements)
UserSession user = new UserSession();
MediaPipeline pipeline = kurento.createMediaPipeline();
user.setMediaPipeline(pipeline);
WebRtcEndpoint webRtcEndpoint = new WebRtcEndpoint.Builder(pipeline).build();
user.setWebRtcEndpoint(webRtcEndpoint);
users.put(session.getId(), user);
webRtcEndpoint.addOnIceCandidateListener(
new EventListener<OnIceCandidateEvent>() {
@Override
public void onEvent(OnIceCandidateEvent event) {
JsonObject response = new JsonObject();
response.addProperty("id", "iceCandidate");
response.add("candidate", JsonUtils.toJsonObject(event.getCandidate()));
try {
synchronized (session) {
session.sendMessage(new TextMessage(response.toString()));
}
} catch (IOException e) {
log.debug(e.getMessage());
}
}
});
mouth = new NuboMouthDetector.Builder(pipeline).build();
webRtcEndpoint.connect(mouth);
mouth.connect(webRtcEndpoint);
// SDP negotiation (offer and answer)
String sdpOffer = jsonMessage.get("sdpOffer").getAsString();
String sdpAnswer = webRtcEndpoint.processOffer(sdpOffer);
// Sending response back to client
JsonObject response = new JsonObject();
response.addProperty("id", "startResponse");
response.addProperty("sdpAnswer", sdpAnswer);
synchronized (session) {
session.sendMessage(new TextMessage(response.toString()));
}
webRtcEndpoint.gatherCandidates();
} catch (Throwable t) {
sendError(session, t.getMessage());
}
}