1 files changed, 77 insertions, 0 deletions
diff --git a/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/text/SubtitleOutputBuffer.java b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/text/SubtitleOutputBuffer.java
new file mode 100644
index 0000000000..9cc7671b24
--- /dev/null
+++ b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/text/SubtitleOutputBuffer.java
@@ -0,0 +1,77 @@
+/*
+ * 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.text;
+
+import androidx.annotation.Nullable;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.Format;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.decoder.OutputBuffer;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.util.Assertions;
+import java.util.List;
+
+/**
+ * Base class for {@link SubtitleDecoder} output buffers.
+ */
+public abstract class SubtitleOutputBuffer extends OutputBuffer implements Subtitle {
+
+  @Nullable private Subtitle subtitle;
+  private long subsampleOffsetUs;
+
+  /**
+   * Sets the content of the output buffer, consisting of a {@link Subtitle} and associated
+   * metadata.
+   *
+   * @param timeUs The time of the start of the subtitle in microseconds.
+   * @param subtitle The subtitle.
+   * @param subsampleOffsetUs An offset that must be added to the subtitle's event times, or
+   *     {@link Format#OFFSET_SAMPLE_RELATIVE} if {@code timeUs} should be added.
+   */
+  public void setContent(long timeUs, Subtitle subtitle, long subsampleOffsetUs) {
+    this.timeUs = timeUs;
+    this.subtitle = subtitle;
+    this.subsampleOffsetUs = subsampleOffsetUs == Format.OFFSET_SAMPLE_RELATIVE ? this.timeUs
+        : subsampleOffsetUs;
+  }
+
+  @Override
+  public int getEventTimeCount() {
+    return Assertions.checkNotNull(subtitle).getEventTimeCount();
+  }
+
+  @Override
+  public long getEventTime(int index) {
+    return Assertions.checkNotNull(subtitle).getEventTime(index) + subsampleOffsetUs;
+  }
+
+  @Override
+  public int getNextEventTimeIndex(long timeUs) {
+    return Assertions.checkNotNull(subtitle).getNextEventTimeIndex(timeUs - subsampleOffsetUs);
+  }
+
+  @Override
+  public List<Cue> getCues(long timeUs) {
+    return Assertions.checkNotNull(subtitle).getCues(timeUs - subsampleOffsetUs);
+  }
+
+  @Override
+  public abstract void release();
+
+  @Override
+  public void clear() {
+    super.clear();
+    subtitle = null;
+  }
+
+}