Clean up BitmapFactoryVideoRenderer

library/core/src/main/java/com/google/android/exoplayer2/video/BitmapFactoryVideoRenderer.java

@@ -24,17 +24,22 @@ import java.nio.ByteBuffer;
 
 public class BitmapFactoryVideoRenderer extends BaseRenderer {
   private static final String TAG = "BitmapFactoryRenderer";
-  final VideoRendererEventListener.EventDispatcher eventDispatcher;
-  @Nullable
-  volatile Surface surface;
+  private static int threadId;
+
   private final Rect rect = new Rect();
   private final Point lastSurface = new Point();
   private final RenderRunnable renderRunnable = new RenderRunnable();
-  private final Thread thread = new Thread(renderRunnable, "BitmapFactoryVideoRenderer");
+
+  final VideoRendererEventListener.EventDispatcher eventDispatcher;
+  final Thread thread = new Thread(renderRunnable, getClass().getSimpleName() + threadId++);
+
+  @Nullable
+  volatile Surface surface;
+
   private VideoSize lastVideoSize = VideoSize.UNKNOWN;
   private long currentTimeUs;
   private long frameUs;
-  boolean ended;
+  private boolean firstFrameRendered;
   @Nullable
   private DecoderCounters decoderCounters;
 
@@ -60,8 +65,7 @@ public class BitmapFactoryVideoRenderer extends BaseRenderer {
 
   @Override
   protected void onDisabled() {
-    renderRunnable.running = false;
-    thread.interrupt();
+    renderRunnable.stop();
 
     @Nullable
     final DecoderCounters decoderCounters = this.decoderCounters;
@@ -111,7 +115,7 @@ public class BitmapFactoryVideoRenderer extends BaseRenderer {
 
   @Override
   public boolean isEnded() {
-    return renderRunnable.ended;
+    return renderRunnable.isEnded();
   }
 
   @Override
@@ -123,32 +127,9 @@ public class BitmapFactoryVideoRenderer extends BaseRenderer {
     return RendererCapabilities.create(C.FORMAT_UNSUPPORTED_TYPE);
   }
 
-  class RenderRunnable implements Runnable {
-    private volatile boolean ended;
-    private boolean firstFrameRendered;
-    private volatile boolean running = true;
-
+  void renderBitmap(final Bitmap bitmap) {
     @Nullable
-    private Bitmap decodeInputBuffer(final DecoderInputBuffer decoderInputBuffer) {
-      @Nullable final ByteBuffer byteBuffer = decoderInputBuffer.data;
-      if (byteBuffer != null) {
-        final Bitmap bitmap;
-        try {
-          bitmap = BitmapFactory.decodeByteArray(byteBuffer.array(), byteBuffer.arrayOffset(),
-              byteBuffer.arrayOffset() + byteBuffer.position());
-          if (bitmap == null) {
-            eventDispatcher.videoCodecError(new NullPointerException("Decode bytes failed"));
-          } else {
-            return bitmap;
-          }
-        } catch (Exception e) {
-          eventDispatcher.videoCodecError(e);
-        }
-      }
-      return null;
-    }
-
-    private void renderBitmap(final Bitmap bitmap, @Nullable final Surface surface) {
+    final Surface surface = this.surface;
     if (surface == null) {
       return;
     }
@@ -192,6 +173,41 @@ public class BitmapFactoryVideoRenderer extends BaseRenderer {
     }
   }
 
+  class RenderRunnable implements Runnable {
+    final DecoderInputBuffer decoderInputBuffer =
+        new DecoderInputBuffer(DecoderInputBuffer.BUFFER_REPLACEMENT_MODE_NORMAL);
+
+    private volatile boolean running = true;
+
+    void stop() {
+      running = false;
+      thread.interrupt();
+    }
+
+    boolean isEnded() {
+      return !running || decoderInputBuffer.isEndOfStream();
+    }
+
+    @Nullable
+    private Bitmap decodeInputBuffer(final DecoderInputBuffer decoderInputBuffer) {
+      @Nullable final ByteBuffer byteBuffer = decoderInputBuffer.data;
+      if (byteBuffer != null) {
+        final Bitmap bitmap;
+        try {
+          bitmap = BitmapFactory.decodeByteArray(byteBuffer.array(), byteBuffer.arrayOffset(),
+              byteBuffer.arrayOffset() + byteBuffer.position());
+          if (bitmap == null) {
+            eventDispatcher.videoCodecError(new NullPointerException("Decode bytes failed"));
+          } else {
+            return bitmap;
+          }
+        } catch (Exception e) {
+          eventDispatcher.videoCodecError(e);
+        }
+      }
+      return null;
+    }
+
     /**
      *
      * @return true if interrupted
@@ -210,9 +226,6 @@ public class BitmapFactoryVideoRenderer extends BaseRenderer {
 
     public void run() {
       final FormatHolder formatHolder = getFormatHolder();
-      @NonNull
-      final DecoderInputBuffer decoderInputBuffer =
-          new DecoderInputBuffer(DecoderInputBuffer.BUFFER_REPLACEMENT_MODE_NORMAL);
       long start = SystemClock.uptimeMillis();
       main:
       while (running) {
@@ -221,10 +234,8 @@ public class BitmapFactoryVideoRenderer extends BaseRenderer {
             formatHolder.format == null ? SampleStream.FLAG_REQUIRE_FORMAT : 0);
         if (result == C.RESULT_BUFFER_READ) {
           if (decoderInputBuffer.isEndOfStream()) {
-            ended = true;
-            if (!sleep()) {
-              ended = false;
-            }
+            //Wait for shutdown or stream to be changed
+            sleep();
             continue;
           }
           final long leadUs = decoderInputBuffer.timeUs - currentTimeUs;
@@ -244,17 +255,17 @@ public class BitmapFactoryVideoRenderer extends BaseRenderer {
           while (currentTimeUs < decoderInputBuffer.timeUs) {
             //Log.d(TAG, "Sleep: us=" + currentTimeUs);
             if (sleep()) {
+              //Sleep was interrupted, discard Bitmap
               continue main;
             }
           }
           if (running) {
-            renderBitmap(bitmap, surface);
+            renderBitmap(bitmap);
           }
         } else if (result == C.RESULT_FORMAT_READ) {
           onFormatChanged(formatHolder);
         }
       }
-      ended = true;
     }
   }
 }