diff options
Diffstat (limited to 'mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/extractor/ChunkIndex.java')
-rw-r--r-- | mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/extractor/ChunkIndex.java | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/extractor/ChunkIndex.java b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/extractor/ChunkIndex.java new file mode 100644 index 0000000000..4fdf9f3c55 --- /dev/null +++ b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/extractor/ChunkIndex.java @@ -0,0 +1,121 @@ +/* + * 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; + +import org.mozilla.thirdparty.com.google.android.exoplayer2.util.Util; +import java.util.Arrays; + +/** + * Defines chunks of samples within a media stream. + */ +public final class ChunkIndex implements SeekMap { + + /** + * The number of chunks. + */ + public final int length; + + /** + * The chunk sizes, in bytes. + */ + public final int[] sizes; + + /** + * The chunk byte offsets. + */ + public final long[] offsets; + + /** + * The chunk durations, in microseconds. + */ + public final long[] durationsUs; + + /** + * The start time of each chunk, in microseconds. + */ + public final long[] timesUs; + + private final long durationUs; + + /** + * @param sizes The chunk sizes, in bytes. + * @param offsets The chunk byte offsets. + * @param durationsUs The chunk durations, in microseconds. + * @param timesUs The start time of each chunk, in microseconds. + */ + public ChunkIndex(int[] sizes, long[] offsets, long[] durationsUs, long[] timesUs) { + this.sizes = sizes; + this.offsets = offsets; + this.durationsUs = durationsUs; + this.timesUs = timesUs; + length = sizes.length; + if (length > 0) { + durationUs = durationsUs[length - 1] + timesUs[length - 1]; + } else { + durationUs = 0; + } + } + + /** + * Obtains the index of the chunk corresponding to a given time. + * + * @param timeUs The time, in microseconds. + * @return The index of the corresponding chunk. + */ + public int getChunkIndex(long timeUs) { + return Util.binarySearchFloor(timesUs, timeUs, true, true); + } + + // SeekMap implementation. + + @Override + public boolean isSeekable() { + return true; + } + + @Override + public long getDurationUs() { + return durationUs; + } + + @Override + public SeekPoints getSeekPoints(long timeUs) { + int chunkIndex = getChunkIndex(timeUs); + SeekPoint seekPoint = new SeekPoint(timesUs[chunkIndex], offsets[chunkIndex]); + if (seekPoint.timeUs >= timeUs || chunkIndex == length - 1) { + return new SeekPoints(seekPoint); + } else { + SeekPoint nextSeekPoint = new SeekPoint(timesUs[chunkIndex + 1], offsets[chunkIndex + 1]); + return new SeekPoints(seekPoint, nextSeekPoint); + } + } + + @Override + public String toString() { + return "ChunkIndex(" + + "length=" + + length + + ", sizes=" + + Arrays.toString(sizes) + + ", offsets=" + + Arrays.toString(offsets) + + ", timeUs=" + + Arrays.toString(timesUs) + + ", durationsUs=" + + Arrays.toString(durationsUs) + + ")"; + } +} |