Merge remote-tracking branch 'upstream/master'

mastodon/src/main/java/org/joinmastodon/android/utils/TransferSpeedTracker.java

@@ -0,0 +1,51 @@
+package org.joinmastodon.android.utils;
+
+import android.os.SystemClock;
+
+public class TransferSpeedTracker{
+   private final double SMOOTHING_FACTOR=0.05;
+
+   private long lastKnownPos;
+   private long lastKnownPosTime;
+   private double lastSpeed;
+   private double averageSpeed;
+   private long totalBytes;
+
+   public void addSample(long position){
+      if(lastKnownPosTime==0){
+         lastKnownPosTime=SystemClock.uptimeMillis();
+         lastKnownPos=position;
+      }else{
+         long time=SystemClock.uptimeMillis();
+         lastSpeed=(position-lastKnownPos)/((double)(time-lastKnownPosTime)/1000.0);
+         lastKnownPos=position;
+         lastKnownPosTime=time;
+      }
+   }
+
+   public double getLastSpeed(){
+      return lastSpeed;
+   }
+
+   public double getAverageSpeed(){
+      return averageSpeed;
+   }
+
+   public long updateAndGetETA(){ // must be called at a constant interval
+      if(averageSpeed==0.0)
+         averageSpeed=lastSpeed;
+      else
+         averageSpeed=SMOOTHING_FACTOR*lastSpeed+(1.0-SMOOTHING_FACTOR)*averageSpeed;
+      return Math.round((totalBytes-lastKnownPos)/averageSpeed);
+   }
+
+   public void setTotalBytes(long totalBytes){
+      this.totalBytes=totalBytes;
+   }
+
+   public void reset(){
+      lastKnownPos=lastKnownPosTime=0;
+      lastSpeed=averageSpeed=0.0;
+      totalBytes=0;
+   }
+}

mastodon/src/main/java/org/joinmastodon/android/utils/TypedObjectPool.java

@@ -0,0 +1,36 @@
+package org.joinmastodon.android.utils;
+
+import java.util.HashMap;
+import java.util.LinkedList;
+import java.util.Objects;
+import java.util.function.Function;
+
+public class TypedObjectPool<K, V>{
+	private final Function<K, V> producer;
+	private final HashMap<K, LinkedList<V>> pool=new HashMap<>();
+
+	public TypedObjectPool(Function<K, V> producer){
+		this.producer=producer;
+	}
+
+	public V obtain(K type){
+		LinkedList<V> tp=pool.get(type);
+		if(tp==null)
+			pool.put(type, tp=new LinkedList<>());
+
+		V value=tp.poll();
+		if(value==null)
+			value=producer.apply(type);
+		return value;
+	}
+
+	public void reuse(K type, V obj){
+		Objects.requireNonNull(obj);
+		Objects.requireNonNull(type);
+
+		LinkedList<V> tp=pool.get(type);
+		if(tp==null)
+			pool.put(type, tp=new LinkedList<>());
+		tp.add(obj);
+	}
+}