client closes peerconnection

emulator/director.go

@@ -24,6 +24,7 @@ type Director struct {
 const FPS = 60
 
 func NewDirector(roomID string, imageChannel chan *image.RGBA, audioChannel chan float32, inputChannel chan int) *Director {
+	// return image channel from where it write
 	director := Director{}
 	director.Done = make(chan struct{})
 	director.audioChannel = audioChannel

emulator/gameview.go

@@ -130,6 +130,10 @@ func (view *GameView) Exit() {
 	if cartridge.Battery != 0 {
 		writeSRAM(sramPath(view.saveFile), cartridge.SRAM)
 	}
+
+	// close producer
+	close(view.imageChannel)
+	close(view.audioChannel)
 }
 
 // Update is called for every period of time, dt is the elapsed time from the last frame