increase size of ExoPlayer video buffer by 50% when RAM > 1.5GB

warren-bank · Mar 8, 2020 · cba0230 · cba0230
1 parent 7201d10
commit cba0230
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Showing 3 changed files with 52 additions and 4 deletions.
diff --git a/...n/java/com/github/warren_bank/exoplayer_airplay_receiver/ui/exoplayer2/PlayerManager.java b/...n/java/com/github/warren_bank/exoplayer_airplay_receiver/ui/exoplayer2/PlayerManager.java
@@ -1,14 +1,17 @@
 package com.github.warren_bank.exoplayer_airplay_receiver.ui.exoplayer2;
 
 import com.github.warren_bank.exoplayer_airplay_receiver.R;
+import com.github.warren_bank.exoplayer_airplay_receiver.utils.SystemUtils;
 
 import android.content.Context;
 import android.net.Uri;
 import android.os.Handler;
+import android.util.Log;
 import android.view.KeyEvent;
 import androidx.annotation.Nullable;
 
 import com.google.android.exoplayer2.C;
+import com.google.android.exoplayer2.DefaultLoadControl;
 import com.google.android.exoplayer2.DefaultRenderersFactory;
 import com.google.android.exoplayer2.ExoPlaybackException;
 import com.google.android.exoplayer2.ExoPlayerFactory;
@@ -33,6 +36,7 @@
 import com.google.android.exoplayer2.trackselection.MappingTrackSelector;
 import com.google.android.exoplayer2.ui.PlayerView;
 import com.google.android.exoplayer2.util.MimeTypes;
+import com.google.android.exoplayer2.upstream.DefaultAllocator;
 import com.google.android.exoplayer2.upstream.DefaultDataSourceFactory;
 import com.google.android.exoplayer2.upstream.DefaultHttpDataSourceFactory;
 import com.google.android.exoplayer2.upstream.RawResourceDataSource;
@@ -42,6 +46,8 @@
 /** Manages ExoPlayer and an internal media queue */
 public final class PlayerManager implements EventListener {
 
+  private static final String TAG = "PlayerManager";
+
   private final class MyArrayList<E> extends ArrayList<E> {
     public void retainLast() {
       int last = this.size() - 1;
@@ -85,7 +91,8 @@ private PlayerManager(
     this.concatenatingMediaSource = new ConcatenatingMediaSource();
     this.trackSelector = new DefaultTrackSelector(context);
     RenderersFactory renderersFactory = new DefaultRenderersFactory(context);
-    this.exoPlayer = ExoPlayerFactory.newSimpleInstance(context, renderersFactory, trackSelector);
+    DefaultLoadControl loadControl = getLoadControl(context);
+    this.exoPlayer = ExoPlayerFactory.newSimpleInstance(context, renderersFactory, trackSelector, loadControl);
     this.exoPlayer.addListener(this);
     this.playerView.setKeepContentOnPlayerReset(false);
     this.playerView.setPlayer(this.exoPlayer);
@@ -113,6 +120,26 @@ public void run() {
     };
   }
 
+  private DefaultLoadControl getLoadControl(Context context) {
+    long thresholdMemorySizeInBytes = 1610612736l; // 1.5 GiB
+    long memorySizeInBytes          = SystemUtils.getMemorySizeInBytes(context);
+    float factor                    = (memorySizeInBytes <= thresholdMemorySizeInBytes) ? 1.0f : 1.5f;
+
+    Log.d(TAG, "memory=" + (float)(((int)((memorySizeInBytes*100)/(1024*1024*1024)))/100f) + "GB, buffer factor=" + (int)(factor*100) + "%");
+
+    DefaultLoadControl loadControl  = new DefaultLoadControl(
+      /* DefaultAllocator allocator=                          */ (new DefaultAllocator(true, C.DEFAULT_BUFFER_SEGMENT_SIZE)),
+      /* int minBufferMs= minBufferAudioMs= minBufferVideoMs= */ (int) (factor * DefaultLoadControl.DEFAULT_MIN_BUFFER_MS),
+      /* int maxBufferMs=                                     */ (int) (factor * DefaultLoadControl.DEFAULT_MAX_BUFFER_MS),
+      /* int bufferForPlaybackMs=                             */ (int) (factor * DefaultLoadControl.DEFAULT_BUFFER_FOR_PLAYBACK_MS),
+      /* int bufferForPlaybackAfterRebufferMs=                */ (int) (factor * DefaultLoadControl.DEFAULT_BUFFER_FOR_PLAYBACK_AFTER_REBUFFER_MS),
+      /* int targetBufferBytes=                               */ (int) (factor * DefaultLoadControl.DEFAULT_TARGET_BUFFER_BYTES),
+      /* boolean prioritizeTimeOverSizeThresholds=            */                 DefaultLoadControl.DEFAULT_PRIORITIZE_TIME_OVER_SIZE_THRESHOLDS
+    );
+
+    return loadControl;
+  }
+
   // Query state of ExoPlayer.
 
   /**

diff --git a/...er/src/main/java/com/github/warren_bank/exoplayer_airplay_receiver/utils/SystemUtils.java b/...er/src/main/java/com/github/warren_bank/exoplayer_airplay_receiver/utils/SystemUtils.java
@@ -2,10 +2,13 @@
 
 import android.content.Context;
 import android.os.Build;
+
 import android.os.PowerManager;
 import android.hardware.display.DisplayManager;
 import android.view.Display;
 
+import android.app.ActivityManager;
+
 public class SystemUtils {
 
     /**
@@ -25,10 +28,28 @@ public static boolean isScreenOn(Context context) {
                 }
             }
             return screenOn;
-        } else {
+        }
+        else {
             PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
             return pm.isScreenOn();
         }
     }
 
+    /**
+    * Returns the total amount of RAM in the current Android device in Bytes (ex: 1610612736 == 1.5 GiB)
+    * @return {Long}
+    */
+    public static long getMemorySizeInBytes(Context context) {
+        if (Build.VERSION.SDK_INT >= 16) {
+            ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
+            ActivityManager.MemoryInfo memoryInfo = new ActivityManager.MemoryInfo();
+            activityManager.getMemoryInfo(memoryInfo);
+            long totalMemory = memoryInfo.totalMem;
+            return totalMemory;
+        }
+        else {
+            return -1l;
+        }
+    }
+
 }
diff --git a/android-studio-project/constants.gradle b/android-studio-project/constants.gradle
@@ -1,6 +1,6 @@
 project.ext {
-    releaseVersionCode = Integer.parseInt("001000816", 10)
-    releaseVersion      = '001.00.08-16API'
+    releaseVersionCode = Integer.parseInt("001000916", 10)
+    releaseVersion      = '001.00.09-16API'
     minSdkVersion       = 16
     targetSdkVersion    = 28
     compileSdkVersion   = 28