desc:水印代码优化

library-vlc/src/main/java/com/yinuo/library/vlc/RtspSurfaceRender2.java

@@ -29,8 +29,6 @@ public class RtspSurfaceRender2 implements RtspHelper.RtspCallback {
 
     private final Object mBitmapLock = new Object();
     private Bitmap mVideoBitmap = null;
-    private TxtOverlay mOverlay = null;
-
     private boolean mIsResumed = false;
     private boolean mRecording = false;
 
@@ -65,7 +63,6 @@ public class RtspSurfaceRender2 implements RtspHelper.RtspCallback {
         holder.addCallback(new SurfaceHolder.Callback() {
             @Override
             public void surfaceCreated(SurfaceHolder holder) {
-                mOverlay = new TxtOverlay();
             }
 
             @Override
@@ -118,7 +115,7 @@ public class RtspSurfaceRender2 implements RtspHelper.RtspCallback {
     @Override
     public void onPreviewFrame(final ByteBuffer buffer, int width, int height) {
         synchronized (mBitmapLock) {
-            Bitmap overLayBitmap = mOverlay.javaOverlayBm("1111111@2222222@333333");
+            Bitmap overLayBitmap = TxtOverlay.INSTANCE.buildOverlayBitmap();
             mVideoBitmap.copyPixelsFromBuffer(buffer.position(0));
             mVideoBitmap = mergeBitmap(mVideoBitmap, overLayBitmap);
             buffer.clear();

library-vlc/src/main/java/com/yinuo/library/vlc/TxtOverlay.kt

@@ -1,44 +1,52 @@
-package com.yinuo.library.vlc;
+package com.yinuo.library.vlc
 
-import android.graphics.Bitmap;
-import android.graphics.Color;
-import android.text.TextUtils;
-
-import org.easydarwin.util.YUVUtils;
-
-import java.text.SimpleDateFormat;
+import android.graphics.Bitmap
+import android.graphics.Color
+import android.text.TextUtils
+import org.easydarwin.util.YUVUtils
+import java.text.SimpleDateFormat
 
 /**
  * Created by John on 2017/2/23.
  */
+object TxtOverlay {
+    // 上一次展示的提示文字
+    private var mLastShowTip = ""
+
+    // 待展示的提示文字
+    private var mToDoShowTip = "1111111@2222222@333333"
 
-public class TxtOverlay {
+    // 外部调用，设置待显示水印文字
+    fun setShowTip(string: String) {
+        mToDoShowTip = string
+    }
 
-    String mTip = "";
-    long lastTipUpdateTime = 0;
-    Bitmap bmp;
+    // 上一次展示的时间
+    private var lastTipUpdateTime: Long = 0
 
-    SimpleDateFormat dateFormat = new SimpleDateFormat("yy-MM-dd HH:mm:ss");
+    // 文字生成的bitmap
+    private var bmp: Bitmap? = null
 
-    public TxtOverlay() {
-    }
+    // 时间格式化字符串
+    private val dateFormat = SimpleDateFormat("yy-MM-dd HH:mm:ss")
 
-    public Bitmap javaOverlayBm(String txt) {
-        if (TextUtils.isEmpty(txt)) {
-            return null;
+    fun buildOverlayBitmap(): Bitmap? {
+        if (TextUtils.isEmpty(mToDoShowTip)) {
+            return null
         }
-        long currentTimeMillis = System.currentTimeMillis();
+        val currentTimeMillis = System.currentTimeMillis()
         // 限制获取bitmap的频率，保证性能
-        if (TextUtils.isEmpty(mTip) || (!txt.equals(mTip) || currentTimeMillis - lastTipUpdateTime > 1000)) {
+        if (TextUtils.isEmpty(mLastShowTip) || mToDoShowTip != mLastShowTip || currentTimeMillis - lastTipUpdateTime > 1000) {
             // 记录更新时间和上一次的文字
-            lastTipUpdateTime = currentTimeMillis;
-            mTip = txt;
+            lastTipUpdateTime = currentTimeMillis
+            mLastShowTip = mToDoShowTip
             // 文字转bitmap
-            bmp = YUVUtils.generateBitmap(dateFormat.format(lastTipUpdateTime) + "@" + txt, 40, Color.WHITE);
+            bmp = YUVUtils.generateBitmap(
+                dateFormat.format(lastTipUpdateTime) + "@" + mToDoShowTip, 40, Color.WHITE
+            )
             // 缩放旋转bitmap
 //            bmp = YUVUtils.rotateImage(bmp, 0);
         }
-        return bmp;
+        return bmp
     }
-
-}
+}