1 files changed, 148 insertions, 0 deletions
diff --git a/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/extractor/mp4/Track.java b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/extractor/mp4/Track.java
new file mode 100644
index 0000000000..b7a1555a76
--- /dev/null
+++ b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/extractor/mp4/Track.java
@@ -0,0 +1,148 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.mozilla.thirdparty.com.google.android.exoplayer2.extractor.mp4;
+
+import androidx.annotation.IntDef;
+import androidx.annotation.Nullable;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.C;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.Format;
+import java.lang.annotation.Documented;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+/**
+ * Encapsulates information describing an MP4 track.
+ */
+public final class Track {
+
+  /**
+   * The transformation to apply to samples in the track, if any. One of {@link
+   * #TRANSFORMATION_NONE} or {@link #TRANSFORMATION_CEA608_CDAT}.
+   */
+  @Documented
+  @Retention(RetentionPolicy.SOURCE)
+  @IntDef({TRANSFORMATION_NONE, TRANSFORMATION_CEA608_CDAT})
+  public @interface Transformation {}
+  /**
+   * A no-op sample transformation.
+   */
+  public static final int TRANSFORMATION_NONE = 0;
+  /**
+   * A transformation for caption samples in cdat atoms.
+   */
+  public static final int TRANSFORMATION_CEA608_CDAT = 1;
+
+  /**
+   * The track identifier.
+   */
+  public final int id;
+
+  /**
+   * One of {@link C#TRACK_TYPE_AUDIO}, {@link C#TRACK_TYPE_VIDEO} and {@link C#TRACK_TYPE_TEXT}.
+   */
+  public final int type;
+
+  /**
+   * The track timescale, defined as the number of time units that pass in one second.
+   */
+  public final long timescale;
+
+  /**
+   * The movie timescale.
+   */
+  public final long movieTimescale;
+
+  /**
+   * The duration of the track in microseconds, or {@link C#TIME_UNSET} if unknown.
+   */
+  public final long durationUs;
+
+  /**
+   * The format.
+   */
+  public final Format format;
+
+  /**
+   * One of {@code TRANSFORMATION_*}. Defines the transformation to apply before outputting each
+   * sample.
+   */
+  @Transformation public final int sampleTransformation;
+
+  /**
+   * Durations of edit list segments in the movie timescale. Null if there is no edit list.
+   */
+  @Nullable public final long[] editListDurations;
+
+  /**
+   * Media times for edit list segments in the track timescale. Null if there is no edit list.
+   */
+  @Nullable public final long[] editListMediaTimes;
+
+  /**
+   * For H264 video tracks, the length in bytes of the NALUnitLength field in each sample. 0 for
+   * other track types.
+   */
+  public final int nalUnitLengthFieldLength;
+
+  @Nullable private final TrackEncryptionBox[] sampleDescriptionEncryptionBoxes;
+
+  public Track(int id, int type, long timescale, long movieTimescale, long durationUs,
+      Format format, @Transformation int sampleTransformation,
+      @Nullable TrackEncryptionBox[] sampleDescriptionEncryptionBoxes, int nalUnitLengthFieldLength,
+      @Nullable long[] editListDurations, @Nullable long[] editListMediaTimes) {
+    this.id = id;
+    this.type = type;
+    this.timescale = timescale;
+    this.movieTimescale = movieTimescale;
+    this.durationUs = durationUs;
+    this.format = format;
+    this.sampleTransformation = sampleTransformation;
+    this.sampleDescriptionEncryptionBoxes = sampleDescriptionEncryptionBoxes;
+    this.nalUnitLengthFieldLength = nalUnitLengthFieldLength;
+    this.editListDurations = editListDurations;
+    this.editListMediaTimes = editListMediaTimes;
+  }
+
+  /**
+   * Returns the {@link TrackEncryptionBox} for the given sample description index.
+   *
+   * @param sampleDescriptionIndex The given sample description index
+   * @return The {@link TrackEncryptionBox} for the given sample description index. Maybe null if no
+   *     such entry exists.
+   */
+  @Nullable
+  public TrackEncryptionBox getSampleDescriptionEncryptionBox(int sampleDescriptionIndex) {
+    return sampleDescriptionEncryptionBoxes == null ? null
+        : sampleDescriptionEncryptionBoxes[sampleDescriptionIndex];
+  }
+
+  // incompatible types in argument.
+  @SuppressWarnings("nullness:argument.type.incompatible")
+  public Track copyWithFormat(Format format) {
+    return new Track(
+        id,
+        type,
+        timescale,
+        movieTimescale,
+        durationUs,
+        format,
+        sampleTransformation,
+        sampleDescriptionEncryptionBoxes,
+        nalUnitLengthFieldLength,
+        editListDurations,
+        editListMediaTimes);
+  }
+}