1 files changed, 157 insertions, 0 deletions
diff --git a/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/source/chunk/ContainerMediaChunk.java b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/source/chunk/ContainerMediaChunk.java
new file mode 100644
index 0000000000..98865e8b0e
--- /dev/null
+++ b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/source/chunk/ContainerMediaChunk.java
@@ -0,0 +1,157 @@
+/*
+ * 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.chunk;
+
+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.extractor.DefaultExtractorInput;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.extractor.Extractor;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.extractor.ExtractorInput;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.extractor.PositionHolder;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.source.chunk.ChunkExtractorWrapper.TrackOutputProvider;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.upstream.DataSource;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.upstream.DataSpec;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.util.Assertions;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.util.Util;
+import java.io.IOException;
+
+/**
+ * A {@link BaseMediaChunk} that uses an {@link Extractor} to decode sample data.
+ */
+public class ContainerMediaChunk extends BaseMediaChunk {
+
+  private static final PositionHolder DUMMY_POSITION_HOLDER = new PositionHolder();
+
+  private final int chunkCount;
+  private final long sampleOffsetUs;
+  private final ChunkExtractorWrapper extractorWrapper;
+
+  private long nextLoadPosition;
+  private volatile boolean loadCanceled;
+  private boolean loadCompleted;
+
+  /**
+   * @param dataSource The source from which the data should be loaded.
+   * @param dataSpec Defines the data to be loaded.
+   * @param trackFormat See {@link #trackFormat}.
+   * @param trackSelectionReason See {@link #trackSelectionReason}.
+   * @param trackSelectionData See {@link #trackSelectionData}.
+   * @param startTimeUs The start time of the media contained by the chunk, in microseconds.
+   * @param endTimeUs The end time of the media contained by the chunk, in microseconds.
+   * @param clippedStartTimeUs The time in the chunk from which output will begin, or {@link
+   *     C#TIME_UNSET} to output from the start of the chunk.
+   * @param clippedEndTimeUs The time in the chunk from which output will end, or {@link
+   *     C#TIME_UNSET} to output to the end of the chunk.
+   * @param chunkIndex The index of the chunk, or {@link C#INDEX_UNSET} if it is not known.
+   * @param chunkCount The number of chunks in the underlying media that are spanned by this
+   *     instance. Normally equal to one, but may be larger if multiple chunks as defined by the
+   *     underlying media are being merged into a single load.
+   * @param sampleOffsetUs An offset to add to the sample timestamps parsed by the extractor.
+   * @param extractorWrapper A wrapped extractor to use for parsing the data.
+   */
+  public ContainerMediaChunk(
+      DataSource dataSource,
+      DataSpec dataSpec,
+      Format trackFormat,
+      int trackSelectionReason,
+      Object trackSelectionData,
+      long startTimeUs,
+      long endTimeUs,
+      long clippedStartTimeUs,
+      long clippedEndTimeUs,
+      long chunkIndex,
+      int chunkCount,
+      long sampleOffsetUs,
+      ChunkExtractorWrapper extractorWrapper) {
+    super(
+        dataSource,
+        dataSpec,
+        trackFormat,
+        trackSelectionReason,
+        trackSelectionData,
+        startTimeUs,
+        endTimeUs,
+        clippedStartTimeUs,
+        clippedEndTimeUs,
+        chunkIndex);
+    this.chunkCount = chunkCount;
+    this.sampleOffsetUs = sampleOffsetUs;
+    this.extractorWrapper = extractorWrapper;
+  }
+
+  @Override
+  public long getNextChunkIndex() {
+    return chunkIndex + chunkCount;
+  }
+
+  @Override
+  public boolean isLoadCompleted() {
+    return loadCompleted;
+  }
+
+  // Loadable implementation.
+
+  @Override
+  public final void cancelLoad() {
+    loadCanceled = true;
+  }
+
+  @SuppressWarnings("NonAtomicVolatileUpdate")
+  @Override
+  public final void load() throws IOException, InterruptedException {
+    if (nextLoadPosition == 0) {
+      // Configure the output and set it as the target for the extractor wrapper.
+      BaseMediaChunkOutput output = getOutput();
+      output.setSampleOffsetUs(sampleOffsetUs);
+      extractorWrapper.init(
+          getTrackOutputProvider(output),
+          clippedStartTimeUs == C.TIME_UNSET ? C.TIME_UNSET : (clippedStartTimeUs - sampleOffsetUs),
+          clippedEndTimeUs == C.TIME_UNSET ? C.TIME_UNSET : (clippedEndTimeUs - sampleOffsetUs));
+    }
+    try {
+      // Create and open the input.
+      DataSpec loadDataSpec = dataSpec.subrange(nextLoadPosition);
+      ExtractorInput input =
+          new DefaultExtractorInput(
+              dataSource, loadDataSpec.absoluteStreamPosition, dataSource.open(loadDataSpec));
+      // Load and decode the sample data.
+      try {
+        Extractor extractor = extractorWrapper.extractor;
+        int result = Extractor.RESULT_CONTINUE;
+        while (result == Extractor.RESULT_CONTINUE && !loadCanceled) {
+          result = extractor.read(input, DUMMY_POSITION_HOLDER);
+        }
+        Assertions.checkState(result != Extractor.RESULT_SEEK);
+      } finally {
+        nextLoadPosition = input.getPosition() - dataSpec.absoluteStreamPosition;
+      }
+    } finally {
+      Util.closeQuietly(dataSource);
+    }
+    loadCompleted = true;
+  }
+
+  /**
+   * Returns the {@link TrackOutputProvider} to be used by the wrapped extractor.
+   *
+   * @param baseMediaChunkOutput The {@link BaseMediaChunkOutput} most recently passed to {@link
+   *     #init(BaseMediaChunkOutput)}.
+   * @return A {@link TrackOutputProvider} to be used by the wrapped extractor.
+   */
+  protected TrackOutputProvider getTrackOutputProvider(BaseMediaChunkOutput baseMediaChunkOutput) {
+    return baseMediaChunkOutput;
+  }
+}