Improved OSC sync

Accept OSC request to sync source by name or id. Changed OSC seek request to be by percent target

ControlManager.cpp

@@ -680,6 +680,11 @@ bool Control::receiveSourceAttribute(Source *target, const std::string &attribut
             arguments >> t >> osc::EndMessage;
             target->call( new Seek( t ), true );
         }
+        /// e.g. '/vimix/name/sync'
+        else if ( attribute.compare(OSC_SYNC) == 0) {
+            // this will require to send feedback status about source
+            send_feedback = true;
+        }
 #ifdef CONTROL_DEBUG
         else {
             Log::Info(CONTROL_OSC_MSG "Ignoring attribute '%s' for target %s.", attribute.c_str(), target->name().c_str());

SourceCallback.cpp

@@ -460,7 +460,7 @@ SourceCallback *RePlay::clone() const
 }
 
 
-Seek::Seek(float time) : SourceCallback(), target_time_(time)
+Seek::Seek(float time) : SourceCallback(), target_(time)
 {
 }
 
@@ -473,8 +473,10 @@ void Seek::update(Source *s, float dt)
 
         // access media player if target source is a media source
         MediaSource *ms = dynamic_cast<MediaSource *>(s);
-        if (ms != nullptr)
+        if (ms != nullptr) {
-            ms->mediaplayer()->seek( GST_SECOND * target_time_ );
+            GstClockTime duration = ms->mediaplayer()->timeline()->duration();
+            ms->mediaplayer()->seek( target_ * duration );
+        }
 
         status_ = FINISHED;
     }
@@ -482,7 +484,7 @@ void Seek::update(Source *s, float dt)
 
 SourceCallback *Seek::clone() const
 {
-    return new Seek(target_time_);
+    return new Seek(target_);
 }
 
 void Seek::accept(Visitor& v)

SourceCallback.h

@@ -180,13 +180,13 @@ public:
 
 class Seek : public SourceCallback
 {
-    float target_time_;
+    float target_;
 
 public:
     Seek (float time = 0.f);
 
-    float value () const { return target_time_;}
+    float value () const { return target_;}
-    void setValue (float t) { target_time_ = t; }
+    void setValue (float t) { target_ = t; }
 
     void update (Source *s, float dt) override;
     SourceCallback *clone() const override;