1 files changed, 100 insertions, 0 deletions
diff --git a/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/text/SimpleSubtitleDecoder.java b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/text/SimpleSubtitleDecoder.java
new file mode 100644
index 0000000000..b58bb1daea
--- /dev/null
+++ b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/text/SimpleSubtitleDecoder.java
@@ -0,0 +1,100 @@
+/*
+ * 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.C;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.decoder.SimpleDecoder;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.util.Assertions;
+import java.nio.ByteBuffer;
+
+/**
+ * Base class for subtitle parsers that use their own decode thread.
+ */
+public abstract class SimpleSubtitleDecoder extends
+    SimpleDecoder<SubtitleInputBuffer, SubtitleOutputBuffer, SubtitleDecoderException> implements
+    SubtitleDecoder {
+
+  private final String name;
+
+  /** @param name The name of the decoder. */
+  @SuppressWarnings("initialization:method.invocation.invalid")
+  protected SimpleSubtitleDecoder(String name) {
+    super(new SubtitleInputBuffer[2], new SubtitleOutputBuffer[2]);
+    this.name = name;
+    setInitialInputBufferSize(1024);
+  }
+
+  @Override
+  public final String getName() {
+    return name;
+  }
+
+  @Override
+  public void setPositionUs(long timeUs) {
+    // Do nothing
+  }
+
+  @Override
+  protected final SubtitleInputBuffer createInputBuffer() {
+    return new SubtitleInputBuffer();
+  }
+
+  @Override
+  protected final SubtitleOutputBuffer createOutputBuffer() {
+    return new SimpleSubtitleOutputBuffer(this);
+  }
+
+  @Override
+  protected final SubtitleDecoderException createUnexpectedDecodeException(Throwable error) {
+    return new SubtitleDecoderException("Unexpected decode error", error);
+  }
+
+  @Override
+  protected final void releaseOutputBuffer(SubtitleOutputBuffer buffer) {
+    super.releaseOutputBuffer(buffer);
+  }
+
+  @SuppressWarnings("ByteBufferBackingArray")
+  @Override
+  @Nullable
+  protected final SubtitleDecoderException decode(
+      SubtitleInputBuffer inputBuffer, SubtitleOutputBuffer outputBuffer, boolean reset) {
+    try {
+      ByteBuffer inputData = Assertions.checkNotNull(inputBuffer.data);
+      Subtitle subtitle = decode(inputData.array(), inputData.limit(), reset);
+      outputBuffer.setContent(inputBuffer.timeUs, subtitle, inputBuffer.subsampleOffsetUs);
+      // Clear BUFFER_FLAG_DECODE_ONLY (see [Internal: b/27893809]).
+      outputBuffer.clearFlag(C.BUFFER_FLAG_DECODE_ONLY);
+      return null;
+    } catch (SubtitleDecoderException e) {
+      return e;
+    }
+  }
+
+  /**
+   * Decodes data into a {@link Subtitle}.
+   *
+   * @param data An array holding the data to be decoded, starting at position 0.
+   * @param size The size of the data to be decoded.
+   * @param reset Whether the decoder must be reset before decoding.
+   * @return The decoded {@link Subtitle}.
+   * @throws SubtitleDecoderException If a decoding error occurs.
+   */
+  protected abstract Subtitle decode(byte[] data, int size, boolean reset)
+      throws SubtitleDecoderException;
+
+}