Merge pull request #16 from google/dev

Add missing files.

library/src/main/java/com/google/android/exoplayer/dash/DashSegmentIndex.java

+/*
+ * Copyright (C) 2014 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 com.google.android.exoplayer.dash;
+
+import com.google.android.exoplayer.dash.mpd.RangedUri;
+
+/**
+ * Indexes the segments within a media stream.
+ *
+ * TODO: Generalize to cover all chunk streaming modes (e.g. SmoothStreaming) if possible.
+ */
+public interface DashSegmentIndex {
+
+  /**
+   * Returns the segment number of the segment containing a given media time.
+   *
+   * @param timeUs The time in microseconds.
+   * @return The segment number of the corresponding segment.
+   */
+  int getSegmentNum(long timeUs);
+
+  /**
+   * Returns the start time of a segment.
+   *
+   * @param segmentNum The segment number.
+   * @return The corresponding start time in microseconds.
+   */
+  long getTimeUs(int segmentNum);
+
+  /**
+   * Returns the duration of a segment.
+   *
+   * @param segmentNum The segment number.
+   * @return The duration of the segment, in microseconds.
+   */
+  long getDurationUs(int segmentNum);
+
+  /**
+   * Returns a {@link RangedUri} defining the location of a segment.
+   *
+   * @param segmentNum The segment number.
+   * @return The {@link RangedUri} defining the location of the data.
+   */
+  RangedUri getSegmentUrl(int segmentNum);
+
+  /**
+   * Returns the segment number of the first segment.
+   *
+   * @return The segment number of the first segment.
+   */
+  int getFirstSegmentNum();
+
+  /**
+   * Returns the segment number of the last segment.
+   *
+   * @return The segment number of the last segment.
+   */
+  int getLastSegmentNum();
+
+}

library/src/main/java/com/google/android/exoplayer/dash/DashWrappingSegmentIndex.java

+/*
+ * Copyright (C) 2014 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 com.google.android.exoplayer.dash;
+
+import com.google.android.exoplayer.dash.mpd.RangedUri;
+import com.google.android.exoplayer.parser.SegmentIndex;
+import com.google.android.exoplayer.util.Util;
+
+import android.net.Uri;
+
+/**
+ * An implementation of {@link DashSegmentIndex} that wraps a {@link SegmentIndex} parsed from a
+ * media stream.
+ */
+public class DashWrappingSegmentIndex implements DashSegmentIndex {
+
+  private final SegmentIndex segmentIndex;
+  private final Uri uri;
+  private final long indexAnchor;
+
+  /**
+   * @param segmentIndex The {@link SegmentIndex} to wrap.
+   * @param uri The {@link Uri} where the data is located.
+   * @param indexAnchor The index anchor point. This value is added to the byte offsets specified
+   *     in the wrapped {@link SegmentIndex}.
+   */
+  public DashWrappingSegmentIndex(SegmentIndex segmentIndex, Uri uri, long indexAnchor) {
+    this.segmentIndex = segmentIndex;
+    this.uri = uri;
+    this.indexAnchor = indexAnchor;
+  }
+
+  @Override
+  public int getFirstSegmentNum() {
+    return 0;
+  }
+
+  @Override
+  public int getLastSegmentNum() {
+    return segmentIndex.length - 1;
+  }
+
+  @Override
+  public long getTimeUs(int segmentNum) {
+    return segmentIndex.timesUs[segmentNum];
+  }
+
+  @Override
+  public long getDurationUs(int segmentNum) {
+    return segmentIndex.durationsUs[segmentNum];
+  }
+
+  @Override
+  public RangedUri getSegmentUrl(int segmentNum) {
+    return new RangedUri(uri, null, indexAnchor + segmentIndex.offsets[segmentNum],
+        segmentIndex.sizes[segmentNum]);
+  }
+
+  @Override
+  public int getSegmentNum(long timeUs) {
+    return Util.binarySearchFloor(segmentIndex.timesUs, timeUs, true, true);
+  }
+
+}