fix: 일시정지 중에 재생속도를 변경하면 영상이 재생되는 오류 해결

src/main/java/site/youtogether/playlist/PlayingVideo.java

@@ -11,6 +11,7 @@
 @Getter
 public abstract class PlayingVideo {
 
+	protected PlayerState playerState;
 	protected final String roomCode;
 	protected final String videoId;
 	protected final Long videoNumber;
@@ -41,24 +42,29 @@ public void startAt(double time) {
 		timer.cancel();
 		timer.purge();
 		currentTime = Math.round(time * 100) / 100.0;
+		playerState = PlayerState.PLAY;
+
 		createTimer(playerRate);
 	}
 
 	public void pauseAt(double time) {
 		timer.cancel();
 		timer.purge();
 		currentTime = Math.round(time * 100) / 100.0;
+		playerState = PlayerState.PAUSE;
 
 		messageService.sendVideoSyncInfo(
-			new VideoSyncInfoMessage(roomCode, videoNumber, videoId, PlayerState.PAUSE, currentTime, playerRate)
+			new VideoSyncInfoMessage(roomCode, videoNumber, videoId, playerState, currentTime, playerRate)
 		);
 	}
 
 	public void stop() {
 		timer.cancel();
 		timer.purge();
+		playerState = PlayerState.END;
+
 		messageService.sendVideoSyncInfo(
-			new VideoSyncInfoMessage(roomCode, videoNumber, videoId, PlayerState.END, currentTime, playerRate)
+			new VideoSyncInfoMessage(roomCode, videoNumber, videoId, playerState, currentTime, playerRate)
 		);
 	}
 
@@ -71,7 +77,14 @@ public void changeRate(double playerRate) {
 
 		this.playerRate = playerRate;
 		this.timerPeriod = Math.round(1000 / playerRate);
-		createTimer(playerRate);
+
+		if (playerState == PlayerState.PLAY) {
+			createTimer(playerRate);
+		} else if (playerState == PlayerState.PAUSE) {
+			messageService.sendVideoSyncInfo(
+				new VideoSyncInfoMessage(roomCode, videoNumber, videoId, playerState, currentTime, playerRate)
+			);
+		}
 	}
 
 	protected abstract void createTimer(double playerRate);