display video worker status

internal/playback/state.go

@@ -1,6 +1,9 @@
 package playback
 
-import "time"
+import (
+	"fmt"
+	"time"
+)
 
 type Unit uint8
 
@@ -31,3 +34,35 @@ type Status struct {
 }
 
 type StatusObserver func(Status)
+
+func (u Unit) String() string {
+	switch u {
+	case UnitVideo:
+		return "video"
+	case UnitAudio:
+		return "audio"
+	case UnitSync:
+		return "sync"
+	default:
+		return fmt.Sprintf("Unit(%d)", uint8(u))
+	}
+}
+
+func (s State) String() string {
+	switch s {
+	case StateIdle:
+		return "idle"
+	case StateConnecting:
+		return "connecting"
+	case StatePlaying:
+		return "playing"
+	case StateReconnecting:
+		return "reconnecting"
+	case StateFailed:
+		return "failed"
+	case StateStopping:
+		return "stopping"
+	default:
+		return fmt.Sprintf("State(%d)", uint8(s))
+	}
+}