From 74d98689c3c970ccf16bf9784f51b505c65e6670 Mon Sep 17 00:00:00 2001
From: Ahmet Inan <xdsopl@gmail.com>
Date: Fri, 3 May 2024 08:33:27 +0200
Subject: [PATCH] use arraycopy

---
 app/src/main/java/xdsopl/robot36/Decoder.java | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/app/src/main/java/xdsopl/robot36/Decoder.java b/app/src/main/java/xdsopl/robot36/Decoder.java
index a6822d7..d3e2127 100644
--- a/app/src/main/java/xdsopl/robot36/Decoder.java
+++ b/app/src/main/java/xdsopl/robot36/Decoder.java
@@ -223,15 +223,13 @@ public class Decoder {
 	private void shiftSamples(int shift) {
 		if (shift <= 0 || shift > curSample)
 			return;
+		curSample -= shift;
 		leaderBreakIndex -= shift;
 		lastSyncPulseIndex -= shift;
 		adjustSyncPulses(last5msSyncPulses, shift);
 		adjustSyncPulses(last9msSyncPulses, shift);
 		adjustSyncPulses(last20msSyncPulses, shift);
-		int endSample = curSample;
-		curSample = 0;
-		for (int i = shift; i < endSample; ++i)
-			scanLineBuffer[curSample++] = scanLineBuffer[i];
+		System.arraycopy(scanLineBuffer, shift, scanLineBuffer, 0, curSample);
 	}
 
 	private boolean handleHeader() {