Add an extractor flag for ignoring edit lists

Issue: #3358

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=172464053

library/core/src/main/java/com/google/android/exoplayer2/extractor/DefaultExtractorsFactory.java

@@ -67,6 +67,7 @@ public final class DefaultExtractorsFactory implements ExtractorsFactory {
   }
 
   private @MatroskaExtractor.Flags int matroskaFlags;
+  private @Mp4Extractor.Flags int mp4Flags;
   private @FragmentedMp4Extractor.Flags int fragmentedMp4Flags;
   private @Mp3Extractor.Flags int mp3Flags;
   private @TsExtractor.Mode int tsMode;
@@ -89,6 +90,18 @@ public final class DefaultExtractorsFactory implements ExtractorsFactory {
     return this;
   }
 
+  /**
+   * Sets flags for {@link Mp4Extractor} instances created by the factory.
+   *
+   * @see Mp4Extractor#Mp4Extractor(int)
+   * @param flags The flags to use.
+   * @return The factory, for convenience.
+   */
+  public synchronized DefaultExtractorsFactory setMp4ExtractorFlags(@Mp4Extractor.Flags int flags) {
+    this.mp4Flags = flags;
+    return this;
+  }
+
   /**
    * Sets flags for {@link FragmentedMp4Extractor} instances created by the factory.
    *
@@ -145,7 +158,7 @@ public final class DefaultExtractorsFactory implements ExtractorsFactory {
     Extractor[] extractors = new Extractor[FLAC_EXTRACTOR_CONSTRUCTOR == null ? 11 : 12];
     extractors[0] = new MatroskaExtractor(matroskaFlags);
     extractors[1] = new FragmentedMp4Extractor(fragmentedMp4Flags);
-    extractors[2] = new Mp4Extractor();
+    extractors[2] = new Mp4Extractor(mp4Flags);
     extractors[3] = new Mp3Extractor(mp3Flags);
     extractors[4] = new AdtsExtractor();
     extractors[5] = new Ac3Extractor();

library/core/src/main/java/com/google/android/exoplayer2/extractor/mp4/AtomParsers.java

@@ -60,11 +60,13 @@ import java.util.List;
    * @param duration The duration in units of the timescale declared in the mvhd atom, or
    *     {@link C#TIME_UNSET} if the duration should be parsed from the tkhd atom.
    * @param drmInitData {@link DrmInitData} to be included in the format.
+   * @param ignoreEditLists Whether to ignore any edit lists in the trak box.
    * @param isQuickTime True for QuickTime media. False otherwise.
    * @return A {@link Track} instance, or {@code null} if the track's type isn't supported.
    */
   public static Track parseTrak(Atom.ContainerAtom trak, Atom.LeafAtom mvhd, long duration,
-      DrmInitData drmInitData, boolean isQuickTime) throws ParserException {
+      DrmInitData drmInitData, boolean ignoreEditLists, boolean isQuickTime)
+      throws ParserException {
     Atom.ContainerAtom mdia = trak.getContainerAtomOfType(Atom.TYPE_mdia);
     int trackType = parseHdlr(mdia.getLeafAtomOfType(Atom.TYPE_hdlr).data);
     if (trackType == C.TRACK_TYPE_UNKNOWN) {
@@ -88,11 +90,17 @@ import java.util.List;
     Pair<Long, String> mdhdData = parseMdhd(mdia.getLeafAtomOfType(Atom.TYPE_mdhd).data);
     StsdData stsdData = parseStsd(stbl.getLeafAtomOfType(Atom.TYPE_stsd).data, tkhdData.id,
         tkhdData.rotationDegrees, mdhdData.second, drmInitData, isQuickTime);
-    Pair<long[], long[]> edtsData = parseEdts(trak.getContainerAtomOfType(Atom.TYPE_edts));
+    long[] editListDurations = null;
+    long[] editListMediaTimes = null;
+    if (!ignoreEditLists) {
+      Pair<long[], long[]> edtsData = parseEdts(trak.getContainerAtomOfType(Atom.TYPE_edts));
+      editListDurations = edtsData.first;
+      editListMediaTimes = edtsData.second;
+    }
     return stsdData.format == null ? null
         : new Track(tkhdData.id, trackType, mdhdData.first, movieTimescale, durationUs,
             stsdData.format, stsdData.requiredSampleTransformation, stsdData.trackEncryptionBoxes,
-            stsdData.nalUnitLengthFieldLength, edtsData.first, edtsData.second);
+            stsdData.nalUnitLengthFieldLength, editListDurations, editListMediaTimes);
   }
 
   /**
@@ -783,7 +791,7 @@ import java.util.List;
    *
    * @param edtsAtom edts (edit box) atom to decode.
    * @return Pair of edit list durations and edit list media times, or a pair of nulls if they are
-   * not present.
+   *     not present.
    */
   private static Pair<long[], long[]> parseEdts(Atom.ContainerAtom edtsAtom) {
     Atom.LeafAtom elst;

library/core/src/main/java/com/google/android/exoplayer2/extractor/mp4/FragmentedMp4Extractor.java

@@ -74,7 +74,7 @@ public final class FragmentedMp4Extractor implements Extractor {
   @Retention(RetentionPolicy.SOURCE)
   @IntDef(flag = true, value = {FLAG_WORKAROUND_EVERY_VIDEO_FRAME_IS_SYNC_FRAME,
       FLAG_WORKAROUND_IGNORE_TFDT_BOX, FLAG_ENABLE_EMSG_TRACK, FLAG_ENABLE_CEA608_TRACK,
-      FLAG_SIDELOADED})
+      FLAG_SIDELOADED, FLAG_WORKAROUND_IGNORE_EDIT_LISTS})
   public @interface Flags {}
   /**
    * Flag to work around an issue in some video streams where every frame is marked as a sync frame.
@@ -103,6 +103,10 @@ public final class FragmentedMp4Extractor implements Extractor {
    * container.
    */
   private static final int FLAG_SIDELOADED = 16;
+  /**
+   * Flag to ignore any edit lists in the stream.
+   */
+  public static final int FLAG_WORKAROUND_IGNORE_EDIT_LISTS = 32;
 
   private static final String TAG = "FragmentedMp4Extractor";
   private static final int SAMPLE_GROUP_TYPE_seig = Util.getIntegerCodeForString("seig");
@@ -432,7 +436,7 @@ public final class FragmentedMp4Extractor implements Extractor {
       Atom.ContainerAtom atom = moov.containerChildren.get(i);
       if (atom.type == Atom.TYPE_trak) {
         Track track = AtomParsers.parseTrak(atom, moov.getLeafAtomOfType(Atom.TYPE_mvhd), duration,
-            drmInitData, false);
+            drmInitData, (flags & FLAG_WORKAROUND_IGNORE_EDIT_LISTS) != 0, false);
         if (track != null) {
           tracks.put(track.id, track);
         }

library/core/src/main/java/com/google/android/exoplayer2/extractor/mp4/Mp4Extractor.java

@@ -28,6 +28,7 @@ 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.mp4.Atom.ContainerAtom;
+import com.google.android.exoplayer2.extractor.mp4.FragmentedMp4Extractor.Flags;
 import com.google.android.exoplayer2.metadata.Metadata;
 import com.google.android.exoplayer2.util.Assertions;
 import com.google.android.exoplayer2.util.NalUnitUtil;
@@ -57,6 +58,17 @@ public final class Mp4Extractor implements Extractor, SeekMap {
 
   };
 
+  /**
+   * Flags controlling the behavior of the extractor.
+   */
+  @Retention(RetentionPolicy.SOURCE)
+  @IntDef(flag = true, value = {FLAG_WORKAROUND_IGNORE_EDIT_LISTS})
+  public @interface Flags {}
+  /**
+   * Flag to ignore any edit lists in the stream.
+   */
+  public static final int FLAG_WORKAROUND_IGNORE_EDIT_LISTS = 1;
+
   /**
    * Parser states.
    */
@@ -76,6 +88,8 @@ public final class Mp4Extractor implements Extractor, SeekMap {
    */
   private static final long RELOAD_MINIMUM_SEEK_DISTANCE = 256 * 1024;
 
+  private final @Flags int flags;
+
   // Temporary arrays.
   private final ParsableByteArray nalStartCode;
   private final ParsableByteArray nalLength;
@@ -98,7 +112,21 @@ public final class Mp4Extractor implements Extractor, SeekMap {
   private long durationUs;
   private boolean isQuickTime;
 
+  /**
+   * Creates a new extractor for unfragmented MP4 streams.
+   */
   public Mp4Extractor() {
+    this(0);
+  }
+
+  /**
+   * Creates a new extractor for unfragmented MP4 streams, using the specified flags to control the
+   * extractor's behavior.
+   *
+   * @param flags Flags that control the extractor's behavior.
+   */
+  public Mp4Extractor(@Flags int flags) {
+    this.flags = flags;
     atomHeader = new ParsableByteArray(Atom.LONG_HEADER_SIZE);
     containerAtoms = new Stack<>();
     nalStartCode = new ParsableByteArray(NalUnitUtil.NAL_START_CODE);
@@ -345,7 +373,7 @@ public final class Mp4Extractor implements Extractor, SeekMap {
       }
 
       Track track = AtomParsers.parseTrak(atom, moov.getLeafAtomOfType(Atom.TYPE_mvhd),
-          C.TIME_UNSET, null, isQuickTime);
+          C.TIME_UNSET, null, (flags & FLAG_WORKAROUND_IGNORE_EDIT_LISTS) != 0, isQuickTime);
       if (track == null) {
         continue;
       }

library/core/src/main/java/com/google/android/exoplayer2/extractor/mp4/Track.java

@@ -81,12 +81,12 @@ public final class Track {
   /**
    * Durations of edit list segments in the movie timescale. Null if there is no edit list.
    */
-  public final long[] editListDurations;
+  @Nullable public final long[] editListDurations;
 
   /**
    * Media times for edit list segments in the track timescale. Null if there is no edit list.
    */
-  public final long[] editListMediaTimes;
+  @Nullable public final long[] editListMediaTimes;
 
   /**
    * For H264 video tracks, the length in bytes of the NALUnitLength field in each sample. 0 for
@@ -99,7 +99,7 @@ public final class Track {
   public Track(int id, int type, long timescale, long movieTimescale, long durationUs,
       Format format, @Transformation int sampleTransformation,
       @Nullable TrackEncryptionBox[] sampleDescriptionEncryptionBoxes, int nalUnitLengthFieldLength,
-      long[] editListDurations, long[] editListMediaTimes) {
+      @Nullable long[] editListDurations, @Nullable long[] editListMediaTimes) {
     this.id = id;
     this.type = type;
     this.timescale = timescale;