Introduce ChunkExtractor.Factory for dependency injection

PiperOrigin-RevId: 360175031

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

@@ -29,8 +29,12 @@ import com.google.android.exoplayer2.extractor.ExtractorOutput;
 import com.google.android.exoplayer2.extractor.PositionHolder;
 import com.google.android.exoplayer2.extractor.SeekMap;
 import com.google.android.exoplayer2.extractor.TrackOutput;
+import com.google.android.exoplayer2.extractor.mkv.MatroskaExtractor;
+import com.google.android.exoplayer2.extractor.mp4.FragmentedMp4Extractor;
+import com.google.android.exoplayer2.extractor.rawcc.RawCcExtractor;
 import com.google.android.exoplayer2.upstream.DataReader;
 import com.google.android.exoplayer2.util.Assertions;
+import com.google.android.exoplayer2.util.MimeTypes;
 import com.google.android.exoplayer2.util.ParsableByteArray;
 import java.io.IOException;
 import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
@@ -41,6 +45,41 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
  */
 public final class BundledChunkExtractor implements ExtractorOutput, ChunkExtractor {
 
+  /** {@link ChunkExtractor.Factory} for instances of this class. */
+  public static final ChunkExtractor.Factory FACTORY =
+      (primaryTrackType,
+          format,
+          enableEventMessageTrack,
+          closedCaptionFormats,
+          playerEmsgTrackOutput) -> {
+        @Nullable String containerMimeType = format.containerMimeType;
+        Extractor extractor;
+        if (MimeTypes.isText(containerMimeType)) {
+          if (MimeTypes.APPLICATION_RAWCC.equals(containerMimeType)) {
+            // RawCC is special because it's a text specific container format.
+            extractor = new RawCcExtractor(format);
+          } else {
+            // All other text types are raw formats that do not need an extractor.
+            return null;
+          }
+        } else if (MimeTypes.isMatroska(containerMimeType)) {
+          extractor = new MatroskaExtractor(MatroskaExtractor.FLAG_DISABLE_SEEK_FOR_CUES);
+        } else {
+          int flags = 0;
+          if (enableEventMessageTrack) {
+            flags |= FragmentedMp4Extractor.FLAG_ENABLE_EMSG_TRACK;
+          }
+          extractor =
+              new FragmentedMp4Extractor(
+                  flags,
+                  /* timestampAdjuster= */ null,
+                  /* sideloadedTrack= */ null,
+                  closedCaptionFormats,
+                  playerEmsgTrackOutput);
+        }
+        return new BundledChunkExtractor(extractor, primaryTrackType, format);
+      };
+
   private static final PositionHolder POSITION_HOLDER = new PositionHolder();
 
   private final Extractor extractor;

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

@@ -22,6 +22,7 @@ import com.google.android.exoplayer2.extractor.ChunkIndex;
 import com.google.android.exoplayer2.extractor.ExtractorInput;
 import com.google.android.exoplayer2.extractor.TrackOutput;
 import java.io.IOException;
+import java.util.List;
 
 /**
  * Extracts samples and track {@link Format Formats} from chunks.
@@ -31,6 +32,27 @@ import java.io.IOException;
  */
 public interface ChunkExtractor {
 
+  /** Creates {@link ChunkExtractor} instances. */
+  interface Factory {
+
+    /**
+     * Returns a new {@link ChunkExtractor} instance.
+     *
+     * @param primaryTrackType The type of the primary track. One of {@link C C.TRACK_TYPE_*}.
+     * @param representationFormat The format of the representation to extract from.
+     * @param enableEventMessageTrack Whether to enable the event message track.
+     * @param closedCaptionFormats The {@link Format Formats} of the Closed-Caption tracks.
+     * @return A new {@link ChunkExtractor} instance, or null if not applicable.
+     */
+    @Nullable
+    ChunkExtractor createProgressiveMediaExtractor(
+        int primaryTrackType,
+        Format representationFormat,
+        boolean enableEventMessageTrack,
+        List<Format> closedCaptionFormats,
+        @Nullable TrackOutput playerEmsgTrackOutput);
+  }
+
   /** Provides {@link TrackOutput} instances to be written to during extraction. */
   interface TrackOutputProvider {
 

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

@@ -26,6 +26,7 @@ import static com.google.android.exoplayer2.source.mediaparser.MediaParserUtil.P
 import android.annotation.SuppressLint;
 import android.media.MediaFormat;
 import android.media.MediaParser;
+import android.util.Log;
 import androidx.annotation.Nullable;
 import androidx.annotation.RequiresApi;
 import com.google.android.exoplayer2.C;
@@ -49,6 +50,25 @@ import java.util.List;
 @RequiresApi(30)
 public final class MediaParserChunkExtractor implements ChunkExtractor {
 
+  // Maximum TAG length is 23 characters.
+  private static final String TAG = "MediaPrsrChunkExtractor";
+
+  public static final ChunkExtractor.Factory FACTORY =
+      (primaryTrackType,
+          format,
+          enableEventMessageTrack,
+          closedCaptionFormats,
+          playerEmsgTrackOutput) -> {
+        if (!MimeTypes.isText(format.containerMimeType)) {
+          // Container is either Matroska or Fragmented MP4.
+          return new MediaParserChunkExtractor(primaryTrackType, format, closedCaptionFormats);
+        } else {
+          // This is either RAWCC (unsupported) or a text track that does not require an extractor.
+          Log.w(TAG, "Ignoring an unsupported text track.");
+          return null;
+        }
+      };
+
   private final OutputConsumerAdapterV30 outputConsumerAdapter;
   private final InputReaderAdapterV30 inputReaderAdapter;
   private final MediaParser mediaParser;

library/dash/src/main/java/com/google/android/exoplayer2/source/dash/DefaultDashChunkSource.java

@@ -26,11 +26,6 @@ import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.Format;
 import com.google.android.exoplayer2.SeekParameters;
 import com.google.android.exoplayer2.extractor.ChunkIndex;
-import com.google.android.exoplayer2.extractor.Extractor;
-import com.google.android.exoplayer2.extractor.TrackOutput;
-import com.google.android.exoplayer2.extractor.mkv.MatroskaExtractor;
-import com.google.android.exoplayer2.extractor.mp4.FragmentedMp4Extractor;
-import com.google.android.exoplayer2.extractor.rawcc.RawCcExtractor;
 import com.google.android.exoplayer2.source.BehindLiveWindowException;
 import com.google.android.exoplayer2.source.chunk.BaseMediaChunkIterator;
 import com.google.android.exoplayer2.source.chunk.BundledChunkExtractor;
@@ -53,7 +48,6 @@ import com.google.android.exoplayer2.upstream.DataSpec;
 import com.google.android.exoplayer2.upstream.HttpDataSource.InvalidResponseCodeException;
 import com.google.android.exoplayer2.upstream.LoaderErrorThrower;
 import com.google.android.exoplayer2.upstream.TransferListener;
-import com.google.android.exoplayer2.util.MimeTypes;
 import com.google.android.exoplayer2.util.Util;
 import java.io.IOException;
 import java.util.ArrayList;
@@ -180,11 +174,15 @@ public class DefaultDashChunkSource implements DashChunkSource {
       representationHolders[i] =
           new RepresentationHolder(
               periodDurationUs,
-              trackType,
               representation,
-              enableEventMessageTrack,
-              closedCaptionFormats,
-              playerTrackEmsgHandler);
+              BundledChunkExtractor.FACTORY.createProgressiveMediaExtractor(
+                  trackType,
+                  representation.format,
+                  enableEventMessageTrack,
+                  closedCaptionFormats,
+                  playerTrackEmsgHandler),
+              /* segmentNumShift= */ 0,
+              representation.getIndex());
     }
   }
 
@@ -666,26 +664,6 @@ public class DefaultDashChunkSource implements DashChunkSource {
 
     /* package */ RepresentationHolder(
         long periodDurationUs,
-        int trackType,
-        Representation representation,
-        boolean enableEventMessageTrack,
-        List<Format> closedCaptionFormats,
-        @Nullable TrackOutput playerEmsgTrackOutput) {
-      this(
-          periodDurationUs,
-          representation,
-          createChunkExtractor(
-              trackType,
-              representation,
-              enableEventMessageTrack,
-              closedCaptionFormats,
-              playerEmsgTrackOutput),
-          /* segmentNumShift= */ 0,
-          representation.getIndex());
-    }
-
-    private RepresentationHolder(
-        long periodDurationUs,
         Representation representation,
         @Nullable ChunkExtractor chunkExtractor,
         long segmentNumShift,
@@ -800,40 +778,5 @@ public class DefaultDashChunkSource implements DashChunkSource {
     public boolean isSegmentAvailableAtFullNetworkSpeed(long segmentNum, long nowPeriodTimeUs) {
       return nowPeriodTimeUs == C.TIME_UNSET || getSegmentEndTimeUs(segmentNum) <= nowPeriodTimeUs;
     }
-
-    @Nullable
-    private static ChunkExtractor createChunkExtractor(
-        int trackType,
-        Representation representation,
-        boolean enableEventMessageTrack,
-        List<Format> closedCaptionFormats,
-        @Nullable TrackOutput playerEmsgTrackOutput) {
-      String containerMimeType = representation.format.containerMimeType;
-      Extractor extractor;
-      if (MimeTypes.isText(containerMimeType)) {
-        if (MimeTypes.APPLICATION_RAWCC.equals(containerMimeType)) {
-          // RawCC is special because it's a text specific container format.
-          extractor = new RawCcExtractor(representation.format);
-        } else {
-          // All other text types are raw formats that do not need an extractor.
-          return null;
-        }
-      } else if (MimeTypes.isMatroska(containerMimeType)) {
-        extractor = new MatroskaExtractor(MatroskaExtractor.FLAG_DISABLE_SEEK_FOR_CUES);
-      } else {
-        int flags = 0;
-        if (enableEventMessageTrack) {
-          flags |= FragmentedMp4Extractor.FLAG_ENABLE_EMSG_TRACK;
-        }
-        extractor =
-            new FragmentedMp4Extractor(
-                flags,
-                /* timestampAdjuster= */ null,
-                /* sideloadedTrack= */ null,
-                closedCaptionFormats,
-                playerEmsgTrackOutput);
-      }
-      return new BundledChunkExtractor(extractor, trackType, representation.format);
-    }
   }
 }