1 files changed, 57 insertions, 0 deletions
diff --git a/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/extractor/ogg/OggSeeker.java b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/extractor/ogg/OggSeeker.java
new file mode 100644
index 0000000000..0a0be963f7
--- /dev/null
+++ b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/extractor/ogg/OggSeeker.java
@@ -0,0 +1,57 @@
+/*
+ * 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.ogg;
+
+import org.mozilla.thirdparty.com.google.android.exoplayer2.extractor.ExtractorInput;
+import org.mozilla.thirdparty.com.google.android.exoplayer2.extractor.SeekMap;
+import java.io.IOException;
+
+/**
+ * Used to seek in an Ogg stream. OggSeeker implementation may do direct seeking or progressive
+ * seeking. OggSeeker works together with a {@link SeekMap} instance to capture the queried position
+ * and start the seeking with an initial estimated position.
+ */
+/* package */ interface OggSeeker {
+
+  /**
+   * Returns a {@link SeekMap} that returns an initial estimated position for progressive seeking
+   * or the final position for direct seeking. Returns null if {@link #read} has yet to return -1.
+   */
+  SeekMap createSeekMap();
+
+  /**
+   * Starts a seek operation.
+   *
+   * @param targetGranule The target granule position.
+   */
+  void startSeek(long targetGranule);
+
+  /**
+   * Reads data from the {@link ExtractorInput} to build the {@link SeekMap} or to continue a seek.
+   * <p/>
+   * If more data is required or if the position of the input needs to be modified then a position
+   * from which data should be provided is returned. Else a negative value is returned. If a seek
+   * has been completed then the value returned is -(currentGranule + 2). Else it is -1.
+   *
+   * @param input The {@link ExtractorInput} to read from.
+   * @return A non-negative position to seek the {@link ExtractorInput} to, or -(currentGranule + 2)
+   *     if the progressive seek has completed, or -1 otherwise.
+   * @throws IOException If reading from the {@link ExtractorInput} fails.
+   * @throws InterruptedException If the thread is interrupted.
+   */
+  long read(ExtractorInput input) throws IOException, InterruptedException;
+
+}