1 files changed, 142 insertions, 0 deletions
diff --git a/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/source/TrackGroup.java b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/source/TrackGroup.java
new file mode 100644
index 0000000000..566238dbdb
--- /dev/null
+++ b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/source/TrackGroup.java
@@ -0,0 +1,142 @@
+/*
+ * 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.source;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+import androidx.annotation.Nullable;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.C;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.Format;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.util.Assertions;
+import java.util.Arrays;
+
+// TODO: Add an allowMultipleStreams boolean to indicate where the one stream per group restriction
+// does not apply.
+/**
+ * Defines a group of tracks exposed by a {@link MediaPeriod}.
+ *
+ * <p>A {@link MediaPeriod} is only able to provide one {@link SampleStream} corresponding to a
+ * group at any given time, however this {@link SampleStream} may adapt between multiple tracks
+ * within the group.
+ */
+public final class TrackGroup implements Parcelable {
+
+  /**
+   * The number of tracks in the group.
+   */
+  public final int length;
+
+  private final Format[] formats;
+
+  // Lazily initialized hashcode.
+  private int hashCode;
+
+  /**
+   * @param formats The track formats. Must not be null, contain null elements or be of length 0.
+   */
+  public TrackGroup(Format... formats) {
+    Assertions.checkState(formats.length > 0);
+    this.formats = formats;
+    this.length = formats.length;
+  }
+
+  /* package */ TrackGroup(Parcel in) {
+    length = in.readInt();
+    formats = new Format[length];
+    for (int i = 0; i < length; i++) {
+      formats[i] = in.readParcelable(Format.class.getClassLoader());
+    }
+  }
+
+  /**
+   * Returns the format of the track at a given index.
+   *
+   * @param index The index of the track.
+   * @return The track's format.
+   */
+  public Format getFormat(int index) {
+    return formats[index];
+  }
+
+  /**
+   * Returns the index of the track with the given format in the group. The format is located by
+   * identity so, for example, {@code group.indexOf(group.getFormat(index)) == index} even if
+   * multiple tracks have formats that contain the same values.
+   *
+   * @param format The format.
+   * @return The index of the track, or {@link C#INDEX_UNSET} if no such track exists.
+   */
+  @SuppressWarnings("ReferenceEquality")
+  public int indexOf(Format format) {
+    for (int i = 0; i < formats.length; i++) {
+      if (format == formats[i]) {
+        return i;
+      }
+    }
+    return C.INDEX_UNSET;
+  }
+
+  @Override
+  public int hashCode() {
+    if (hashCode == 0) {
+      int result = 17;
+      result = 31 * result + Arrays.hashCode(formats);
+      hashCode = result;
+    }
+    return hashCode;
+  }
+
+  @Override
+  public boolean equals(@Nullable Object obj) {
+    if (this == obj) {
+      return true;
+    }
+    if (obj == null || getClass() != obj.getClass()) {
+      return false;
+    }
+    TrackGroup other = (TrackGroup) obj;
+    return length == other.length && Arrays.equals(formats, other.formats);
+  }
+
+  // Parcelable implementation.
+
+  @Override
+  public int describeContents() {
+    return 0;
+  }
+
+  @Override
+  public void writeToParcel(Parcel dest, int flags) {
+    dest.writeInt(length);
+    for (int i = 0; i < length; i++) {
+      dest.writeParcelable(formats[i], 0);
+    }
+  }
+
+  public static final Parcelable.Creator<TrackGroup> CREATOR =
+      new Parcelable.Creator<TrackGroup>() {
+
+        @Override
+        public TrackGroup createFromParcel(Parcel in) {
+          return new TrackGroup(in);
+        }
+
+        @Override
+        public TrackGroup[] newArray(int size) {
+          return new TrackGroup[size];
+        }
+      };
+}