Feature/toggle buffering (#3)

This PR adds the property disableBuffering: boolean for android. The PR was initally created as a personal fork and referenced in crunchyroll/vilos#1227

also updated RNVLoadControl constructor and method to reflect new ExoPlayer.LoadControl api

related ticket: https://jira.tenkasu.net/browse/VEX-3776

Video.js

@@ -470,6 +470,7 @@ Video.propTypes = {
   ignoreSilentSwitch: PropTypes.oneOf(['ignore', 'obey']),
   reportBandwidth: PropTypes.bool,
   disableFocus: PropTypes.bool,
+  disableBuffering: PropTypes.bool,
   controls: PropTypes.bool,
   audioOnly: PropTypes.bool,
   currentTime: PropTypes.number,

android-exoplayer/src/main/java/com/brentvatne/exoplayer/ReactExoplayerView.java

@@ -26,6 +26,7 @@ import com.facebook.react.bridge.ReadableMap;
 import com.facebook.react.bridge.WritableArray;
 import com.facebook.react.bridge.WritableMap;
 import com.facebook.react.uimanager.ThemedReactContext;
+import com.facebook.react.util.RNLog;
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.DefaultLoadControl;
 import com.google.android.exoplayer2.DefaultRenderersFactory;
@@ -70,6 +71,7 @@ import com.google.android.exoplayer2.upstream.DataSource;
 import com.google.android.exoplayer2.upstream.DefaultAllocator;
 import com.google.android.exoplayer2.upstream.DefaultBandwidthMeter;
 import com.google.android.exoplayer2.upstream.HttpDataSource;
+import com.google.android.exoplayer2.util.Assertions;
 import com.google.android.exoplayer2.util.Util;
 
 import java.net.CookieHandler;
@@ -148,6 +150,7 @@ class ReactExoplayerView extends FrameLayout implements
     private Dynamic textTrackValue;
     private ReadableArray textTracks;
     private boolean disableFocus;
+    private boolean disableBuffering;
     private boolean preventsDisplaySleepDuringVideoPlayback = true;
     private float mProgressUpdateInterval = 250.0f;
     private boolean playInBackground = false;
@@ -183,7 +186,7 @@ class ReactExoplayerView extends FrameLayout implements
             }
         }
     };
-    
+
     public double getPositionInFirstPeriodMsForCurrentWindow(long currentPosition) {
         Timeline.Window window = new Timeline.Window();
         if(!player.getCurrentTimeline().isEmpty()) {    
@@ -388,6 +391,28 @@ class ReactExoplayerView extends FrameLayout implements
         view.layout(view.getLeft(), view.getTop(), view.getMeasuredWidth(), view.getMeasuredHeight());
     }
 
+    private class RNVLoadControl extends DefaultLoadControl {
+        public RNVLoadControl(DefaultAllocator allocator, int minBufferMs, int maxBufferMs, int bufferForPlaybackMs, int bufferForPlaybackAfterRebufferMs, int targetBufferBytes, boolean prioritizeTimeOverSizeThresholds, int backBufferDurationMs, boolean retainBackBufferFromKeyframe) {
+            super(allocator,
+                    minBufferMs,
+                    maxBufferMs,
+                    bufferForPlaybackMs,
+                    bufferForPlaybackAfterRebufferMs,
+                    targetBufferBytes,
+                    prioritizeTimeOverSizeThresholds,
+                    backBufferDurationMs,
+                    retainBackBufferFromKeyframe);
+        }
+
+        @Override
+        public boolean shouldContinueLoading(long playbackPositionUs, long bufferedDurationUs, float playbackSpeed) {
+            if (ReactExoplayerView.this.disableBuffering) {
+                return false;
+            }
+            return super.shouldContinueLoading(playbackPositionUs, bufferedDurationUs, playbackSpeed);
+        }
+    }
+
     private void initializePlayer() {
         ReactExoplayerView self = this;
         // This ensures all props have been settled, to avoid async racing conditions.
@@ -401,19 +426,24 @@ class ReactExoplayerView extends FrameLayout implements
                             .setMaxVideoBitrate(maxBitRate == 0 ? Integer.MAX_VALUE : maxBitRate));
 
                     DefaultAllocator allocator = new DefaultAllocator(true, C.DEFAULT_BUFFER_SEGMENT_SIZE);
-                    DefaultLoadControl.Builder defaultLoadControlBuilder = new DefaultLoadControl.Builder();
-                    defaultLoadControlBuilder.setAllocator(allocator);
-                    defaultLoadControlBuilder.setBufferDurationsMs(minBufferMs, maxBufferMs, bufferForPlaybackMs, bufferForPlaybackAfterRebufferMs);
-                    defaultLoadControlBuilder.setTargetBufferBytes(-1);
-                    defaultLoadControlBuilder.setPrioritizeTimeOverSizeThresholds(true);
-                    DefaultLoadControl defaultLoadControl = defaultLoadControlBuilder.createDefaultLoadControl();
+                    RNVLoadControl loadControl = new RNVLoadControl(
+                            allocator,
+                            minBufferMs,
+                            maxBufferMs,
+                            bufferForPlaybackMs,
+                            bufferForPlaybackAfterRebufferMs,
+                            -1,
+                            true,
+                            DefaultLoadControl.DEFAULT_BACK_BUFFER_DURATION_MS,
+                            DefaultLoadControl.DEFAULT_RETAIN_BACK_BUFFER_FROM_KEYFRAME
+                    );
                     DefaultRenderersFactory renderersFactory =
                             new DefaultRenderersFactory(getContext())
                                     .setExtensionRendererMode(DefaultRenderersFactory.EXTENSION_RENDERER_MODE_OFF);
                     player = new SimpleExoPlayer.Builder(getContext(), renderersFactory)
                                 .setTrackSelector​(trackSelector)
                                 .setBandwidthMeter(bandwidthMeter)
-                                .setLoadControl(defaultLoadControl)
+                                .setLoadControl(loadControl)
                                 .build();
                     player.addListener(self);
                     player.addMetadataOutput(self);
@@ -1282,6 +1312,10 @@ class ReactExoplayerView extends FrameLayout implements
         this.disableFocus = disableFocus;
     }
 
+    public void setDisableBuffering(boolean disableBuffering) {
+        this.disableBuffering = disableBuffering;
+    }
+
     public void setFullscreen(boolean fullscreen) {
         if (fullscreen == isFullscreen) {
             return; // Avoid generating events when nothing is changing

android-exoplayer/src/main/java/com/brentvatne/exoplayer/ReactExoplayerViewManager.java

@@ -63,6 +63,7 @@ public class ReactExoplayerViewManager extends ViewGroupManager<ReactExoplayerVi
     private static final String PROP_MAXIMUM_BIT_RATE = "maxBitRate";
     private static final String PROP_PLAY_IN_BACKGROUND = "playInBackground";
     private static final String PROP_DISABLE_FOCUS = "disableFocus";
+    private static final String PROP_DISABLE_BUFFERING = "disableBuffering";
     private static final String PROP_FULLSCREEN = "fullscreen";
     private static final String PROP_USE_TEXTURE_VIEW = "useTextureView";
     private static final String PROP_SELECTED_VIDEO_TRACK = "selectedVideoTrack";
@@ -293,6 +294,11 @@ public class ReactExoplayerViewManager extends ViewGroupManager<ReactExoplayerVi
         videoView.setDisableFocus(disableFocus);
     }
 
+    @ReactProp(name = PROP_DISABLE_BUFFERING, defaultBoolean = false)
+    public void setDisableBuffering(final ReactExoplayerView videoView, final boolean disableBuffering) {
+        videoView.setDisableBuffering(disableBuffering);
+    }
+
     @ReactProp(name = PROP_FULLSCREEN, defaultBoolean = false)
     public void setFullscreen(final ReactExoplayerView videoView, final boolean fullscreen) {
         videoView.setFullscreen(fullscreen);