Merge pull request #255 from mayurk2:use_edts_offset_if_it_is_for_entire_file

PiperOrigin-RevId: 513213229

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

@@ -968,6 +968,26 @@ public class FragmentedMp4Extractor implements Extractor {
     return version == 1 ? tfdt.readUnsignedLongToLong() : tfdt.readUnsignedInt();
   }
 
+  private static boolean isEdtsListDurationForEntireMediaTimeline(Track track) {
+    // Currently we only support a single edit that moves the entire media timeline (indicated by
+    // duration == 0 or (editListDurationUs + editListMediaTimeUs) >= track duration.
+    // Other uses of edit lists are uncommon and unsupported.
+    if (track.editListDurations == null
+        || track.editListDurations.length != 1
+        || track.editListMediaTimes == null) {
+      return false;
+    }
+    if (track.editListDurations[0] == 0) {
+      return true;
+    }
+    long editListEndMediaTimeUs =
+        Util.scaleLargeTimestamp(
+            track.editListDurations[0] + track.editListMediaTimes[0],
+            C.MICROS_PER_SECOND,
+            track.movieTimescale);
+    return editListEndMediaTimeUs >= track.durationUs;
+  }
+
   /**
    * Parses a trun atom (defined in 14496-12).
    *
@@ -1015,11 +1035,8 @@ public class FragmentedMp4Extractor implements Extractor {
     // ensure that the first frame's presentation timestamp is zero.
     long edtsOffset = 0;
 
-    // Currently we only support a single edit that moves the entire media timeline (indicated by
-    // duration == 0). Other uses of edit lists are uncommon and unsupported.
-    if (track.editListDurations != null
-        && track.editListDurations.length == 1
-        && track.editListDurations[0] == 0) {
+    // Currently we only support a single edit that moves the entire media timeline.
+    if (isEdtsListDurationForEntireMediaTimeline(track)) {
       edtsOffset = castNonNull(track.editListMediaTimes)[0];
     }