Support ExtractorFactory in DefaultMediaSourceFactory.

This allows to customize extractor flags more easily when setting up the player.

In addition, we need to provide a way to pass in the ExtractorFactory through
the constructor chain starting in SimpleExoPlayer so that removing the
DefaultExtractorsFactory is possible for R8.

PiperOrigin-RevId: 330472935

library/core/src/main/java/com/google/android/exoplayer2/SimpleExoPlayer.java

@@ -38,6 +38,8 @@
 import com.google.android.exoplayer2.decoder.DecoderCounters;
 import com.google.android.exoplayer2.device.DeviceInfo;
 import com.google.android.exoplayer2.device.DeviceListener;
+import com.google.android.exoplayer2.extractor.DefaultExtractorsFactory;
+import com.google.android.exoplayer2.extractor.ExtractorsFactory;
 import com.google.android.exoplayer2.metadata.Metadata;
 import com.google.android.exoplayer2.metadata.MetadataOutput;
 import com.google.android.exoplayer2.source.DefaultMediaSourceFactory;
@@ -52,6 +54,7 @@
 import com.google.android.exoplayer2.trackselection.TrackSelector;
 import com.google.android.exoplayer2.upstream.BandwidthMeter;
 import com.google.android.exoplayer2.upstream.DefaultBandwidthMeter;
+import com.google.android.exoplayer2.upstream.DefaultDataSourceFactory;
 import com.google.android.exoplayer2.util.Assertions;
 import com.google.android.exoplayer2.util.Clock;
 import com.google.android.exoplayer2.util.Log;
@@ -115,9 +118,11 @@ public static final class Builder {
     /**
      * Creates a builder.
      *
-     * <p>Use {@link #Builder(Context, RenderersFactory)} instead, if you intend to provide a custom
-     * {@link RenderersFactory}. This is to ensure that ProGuard or R8 can remove ExoPlayer's {@link
-     * DefaultRenderersFactory} from the APK.
+     * <p>Use {@link #Builder(Context, RenderersFactory)} or {@link #Builder(Context,
+     * RenderersFactory, ExtractorsFactory)} instead, if you intend to provide a custom {@link
+     * RenderersFactory} or a custom {@link ExtractorsFactory}. This is to ensure that ProGuard or
+     * R8 can remove ExoPlayer's {@link DefaultRenderersFactory} and {@link
+     * DefaultExtractorsFactory} from the APK.
      *
      * <p>The builder uses the following default values:
      *
@@ -146,7 +151,7 @@ public static final class Builder {
      * @param context A {@link Context}.
      */
     public Builder(Context context) {
-      this(context, new DefaultRenderersFactory(context));
+      this(context, new DefaultRenderersFactory(context), new DefaultExtractorsFactory());
     }
 
     /**
@@ -159,11 +164,30 @@ public Builder(Context context) {
      *     player.
      */
     public Builder(Context context, RenderersFactory renderersFactory) {
+      this(context, renderersFactory, new DefaultExtractorsFactory());
+    }
+
+    /**
+     * Creates a builder with a custom {@link RenderersFactory} and {@link ExtractorsFactory}.
+     *
+     * <p>See {@link #Builder(Context)} for a list of default values.
+     *
+     * @param context A {@link Context}.
+     * @param renderersFactory A factory for creating {@link Renderer Renderers} to be used by the
+     *     player.
+     * @param extractorsFactory An {@link ExtractorsFactory} used to extract progressive media from
+     *     its container.
+     */
+    public Builder(
+        Context context, RenderersFactory renderersFactory, ExtractorsFactory extractorsFactory) {
       this(
           context,
           renderersFactory,
           new DefaultTrackSelector(context),
-          new DefaultMediaSourceFactory(context),
+          new DefaultMediaSourceFactory(
+              new DefaultDataSourceFactory(
+                  context, Util.getUserAgent(context, ExoPlayerLibraryInfo.VERSION_SLASHY)),
+              extractorsFactory),
           new DefaultLoadControl(),
           DefaultBandwidthMeter.getSingletonInstance(context),
           new AnalyticsCollector(Clock.DEFAULT));
@@ -546,7 +570,7 @@ protected SimpleExoPlayer(
       Clock clock,
       Looper applicationLooper) {
     this(
-        new Builder(context, renderersFactory)
+        new Builder(context, renderersFactory, new DefaultExtractorsFactory())
             .setTrackSelector(trackSelector)
             .setMediaSourceFactory(mediaSourceFactory)
             .setLoadControl(loadControl)

library/core/src/main/java/com/google/android/exoplayer2/offline/DownloadHelper.java

@@ -34,6 +34,7 @@
 import com.google.android.exoplayer2.Timeline;
 import com.google.android.exoplayer2.audio.AudioRendererEventListener;
 import com.google.android.exoplayer2.drm.DrmSessionManager;
+import com.google.android.exoplayer2.extractor.ExtractorsFactory;
 import com.google.android.exoplayer2.source.DefaultMediaSourceFactory;
 import com.google.android.exoplayer2.source.MediaPeriod;
 import com.google.android.exoplayer2.source.MediaSource;
@@ -889,7 +890,7 @@ private static MediaSource createMediaSourceInternal(
       MediaItem mediaItem,
       DataSource.Factory dataSourceFactory,
       @Nullable DrmSessionManager drmSessionManager) {
-    return new DefaultMediaSourceFactory(dataSourceFactory)
+    return new DefaultMediaSourceFactory(dataSourceFactory, ExtractorsFactory.EMPTY)
         .setDrmSessionManager(drmSessionManager)
         .createMediaSource(mediaItem);
   }

library/core/src/main/java/com/google/android/exoplayer2/source/DefaultMediaSourceFactory.java

@@ -23,13 +23,14 @@
 import com.google.android.exoplayer2.ExoPlayerLibraryInfo;
 import com.google.android.exoplayer2.MediaItem;
 import com.google.android.exoplayer2.drm.DrmSessionManager;
+import com.google.android.exoplayer2.extractor.DefaultExtractorsFactory;
+import com.google.android.exoplayer2.extractor.ExtractorsFactory;
 import com.google.android.exoplayer2.offline.StreamKey;
 import com.google.android.exoplayer2.source.ads.AdsLoader;
 import com.google.android.exoplayer2.source.ads.AdsLoader.AdViewProvider;
 import com.google.android.exoplayer2.source.ads.AdsMediaSource;
 import com.google.android.exoplayer2.upstream.DataSource;
 import com.google.android.exoplayer2.upstream.DefaultDataSourceFactory;
-import com.google.android.exoplayer2.upstream.DefaultLoadErrorHandlingPolicy;
 import com.google.android.exoplayer2.upstream.HttpDataSource;
 import com.google.android.exoplayer2.upstream.LoadErrorHandlingPolicy;
 import com.google.android.exoplayer2.util.Assertions;
@@ -64,9 +65,10 @@
  *   <li>{@link ProgressiveMediaSource.Factory} serves as a fallback if the item's {@link
  *       MediaItem.PlaybackProperties#uri uri} doesn't match one of the above. It tries to infer the
  *       required extractor by using the {@link
- *       com.google.android.exoplayer2.extractor.DefaultExtractorsFactory}. An {@link
- *       UnrecognizedInputFormatException} is thrown if none of the available extractors can read
- *       the stream.
+ *       com.google.android.exoplayer2.extractor.DefaultExtractorsFactory} or the {@link
+ *       ExtractorsFactory} provided in {@link #DefaultMediaSourceFactory(DataSource.Factory,
+ *       ExtractorsFactory)}. An {@link UnrecognizedInputFormatException} is thrown if none of the
+ *       available extractors can read the stream.
  * </ul>
  *
  * <h3>Ad support for media items with ad tag URIs</h3>
@@ -105,6 +107,7 @@ public interface AdsLoaderProvider {
   @Nullable private AdViewProvider adViewProvider;
   @Nullable private DrmSessionManager drmSessionManager;
   @Nullable private List<StreamKey> streamKeys;
+  @Nullable private LoadErrorHandlingPolicy loadErrorHandlingPolicy;
 
   /**
    * Creates a new instance.
@@ -124,9 +127,22 @@ public DefaultMediaSourceFactory(Context context) {
    *     for requesting media data.
    */
   public DefaultMediaSourceFactory(DataSource.Factory dataSourceFactory) {
+    this(dataSourceFactory, new DefaultExtractorsFactory());
+  }
+
+  /**
+   * Creates a new instance.
+   *
+   * @param dataSourceFactory A {@link DataSource.Factory} to create {@link DataSource} instances
+   *     for requesting media data.
+   * @param extractorsFactory An {@link ExtractorsFactory} used to extract progressive media from
+   *     its container.
+   */
+  public DefaultMediaSourceFactory(
+      DataSource.Factory dataSourceFactory, ExtractorsFactory extractorsFactory) {
     this.dataSourceFactory = dataSourceFactory;
     mediaSourceDrmHelper = new MediaSourceDrmHelper();
-    mediaSourceFactories = loadDelegates(dataSourceFactory);
+    mediaSourceFactories = loadDelegates(dataSourceFactory, extractorsFactory);
     supportedTypes = new int[mediaSourceFactories.size()];
     for (int i = 0; i < mediaSourceFactories.size(); i++) {
       supportedTypes[i] = mediaSourceFactories.keyAt(i);
@@ -180,13 +196,7 @@ public DefaultMediaSourceFactory setDrmSessionManager(
   @Override
   public DefaultMediaSourceFactory setLoadErrorHandlingPolicy(
       @Nullable LoadErrorHandlingPolicy loadErrorHandlingPolicy) {
-    LoadErrorHandlingPolicy newLoadErrorHandlingPolicy =
-        loadErrorHandlingPolicy != null
-            ? loadErrorHandlingPolicy
-            : new DefaultLoadErrorHandlingPolicy();
-    for (int i = 0; i < mediaSourceFactories.size(); i++) {
-      mediaSourceFactories.valueAt(i).setLoadErrorHandlingPolicy(newLoadErrorHandlingPolicy);
-    }
+    this.loadErrorHandlingPolicy = loadErrorHandlingPolicy;
     return this;
   }
 
@@ -224,6 +234,7 @@ public MediaSource createMediaSource(MediaItem mediaItem) {
         !mediaItem.playbackProperties.streamKeys.isEmpty()
             ? mediaItem.playbackProperties.streamKeys
             : streamKeys);
+    mediaSourceFactory.setLoadErrorHandlingPolicy(loadErrorHandlingPolicy);
 
     MediaSource mediaSource = mediaSourceFactory.createMediaSource(mediaItem);
 
@@ -285,7 +296,7 @@ private MediaSource maybeWrapWithAdsMediaSource(MediaItem mediaItem, MediaSource
   }
 
   private static SparseArray<MediaSourceFactory> loadDelegates(
-      DataSource.Factory dataSourceFactory) {
+      DataSource.Factory dataSourceFactory, ExtractorsFactory extractorsFactory) {
     SparseArray<MediaSourceFactory> factories = new SparseArray<>();
     // LINT.IfChange
     try {
@@ -320,7 +331,8 @@ private static SparseArray<MediaSourceFactory> loadDelegates(
       // Expected if the app was built without the hls module.
     }
     // LINT.ThenChange(../../../../../../../../proguard-rules.txt)
-    factories.put(C.TYPE_OTHER, new ProgressiveMediaSource.Factory(dataSourceFactory));
+    factories.put(
+        C.TYPE_OTHER, new ProgressiveMediaSource.Factory(dataSourceFactory, extractorsFactory));
     return factories;
   }
 }

library/core/src/main/java/com/google/android/exoplayer2/source/MediaSourceFactory.java

@@ -24,6 +24,7 @@
 import com.google.android.exoplayer2.drm.HttpMediaDrmCallback;
 import com.google.android.exoplayer2.offline.StreamKey;
 import com.google.android.exoplayer2.upstream.DefaultHttpDataSourceFactory;
+import com.google.android.exoplayer2.upstream.DefaultLoadErrorHandlingPolicy;
 import com.google.android.exoplayer2.upstream.HttpDataSource;
 import com.google.android.exoplayer2.upstream.LoadErrorHandlingPolicy;
 import java.util.List;
@@ -59,7 +60,8 @@ default MediaSourceFactory setStreamKeys(@Nullable List<StreamKey> streamKeys) {
    * Sets the {@link DrmSessionManager} to use for all media items regardless of their {@link
    * MediaItem.DrmConfiguration}.
    *
-   * @param drmSessionManager The {@link DrmSessionManager}.
+   * @param drmSessionManager The {@link DrmSessionManager}, or {@code null} to use the {@link
+   *     DefaultDrmSessionManager}.
    * @return This factory, for convenience.
    */
   MediaSourceFactory setDrmSessionManager(@Nullable DrmSessionManager drmSessionManager);
@@ -85,15 +87,17 @@ MediaSourceFactory setDrmHttpDataSourceFactory(
    * #setDrmHttpDataSourceFactory(HttpDataSource.Factory)} or a {@link DrmSessionManager} has been
    * set by {@link #setDrmSessionManager(DrmSessionManager)}, this user agent is ignored.
    *
-   * @param userAgent The user agent to be used for DRM requests.
+   * @param userAgent The user agent to be used for DRM requests, or {@code null} to use the
+   *     default.
    * @return This factory, for convenience.
    */
   MediaSourceFactory setDrmUserAgent(@Nullable String userAgent);
 
   /**
    * Sets an optional {@link LoadErrorHandlingPolicy}.
    *
-   * @param loadErrorHandlingPolicy A {@link LoadErrorHandlingPolicy}.
+   * @param loadErrorHandlingPolicy A {@link LoadErrorHandlingPolicy}, or {@code null} to use the
+   *     {@link DefaultLoadErrorHandlingPolicy}.
    * @return This factory, for convenience.
    */
   MediaSourceFactory setLoadErrorHandlingPolicy(

library/extractor/src/main/java/com/google/android/exoplayer2/extractor/ExtractorsFactory.java

@@ -22,6 +22,12 @@
 /** Factory for arrays of {@link Extractor} instances. */
 public interface ExtractorsFactory {
 
+  /**
+   * Extractor factory that returns an empty list of extractors. Can be used whenever {@link
+   * Extractor Extractors} are not required.
+   */
+  ExtractorsFactory EMPTY = () -> new Extractor[] {};
+
   /** Returns an array of new {@link Extractor} instances. */
   Extractor[] createExtractors();