| /* |
| * 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 com.google.android.exoplayer2.extractor.mp4; |
| |
| import com.google.android.exoplayer2.C; |
| import com.google.android.exoplayer2.util.Assertions; |
| import com.google.android.exoplayer2.util.Util; |
| |
| /** Sample table for a track in an MP4 file. */ |
| /* package */ final class TrackSampleTable { |
| |
| /** The track corresponding to this sample table. */ |
| public final Track track; |
| /** Number of samples. */ |
| public final int sampleCount; |
| /** Sample offsets in bytes. */ |
| public final long[] offsets; |
| /** Sample sizes in bytes. */ |
| public final int[] sizes; |
| /** Maximum sample size in {@link #sizes}. */ |
| public final int maximumSize; |
| /** Sample timestamps in microseconds. */ |
| public final long[] timestampsUs; |
| /** Sample flags. */ |
| public final int[] flags; |
| /** The duration of the track sample table in microseconds. */ |
| public final long durationUs; |
| |
| public TrackSampleTable( |
| Track track, |
| long[] offsets, |
| int[] sizes, |
| int maximumSize, |
| long[] timestampsUs, |
| int[] flags, |
| long durationUs) { |
| Assertions.checkArgument(sizes.length == timestampsUs.length); |
| Assertions.checkArgument(offsets.length == timestampsUs.length); |
| Assertions.checkArgument(flags.length == timestampsUs.length); |
| |
| this.track = track; |
| this.offsets = offsets; |
| this.sizes = sizes; |
| this.maximumSize = maximumSize; |
| this.timestampsUs = timestampsUs; |
| this.flags = flags; |
| this.durationUs = durationUs; |
| sampleCount = offsets.length; |
| if (flags.length > 0) { |
| flags[flags.length - 1] |= C.BUFFER_FLAG_LAST_SAMPLE; |
| } |
| } |
| |
| /** |
| * Returns the sample index of the closest synchronization sample at or before the given |
| * timestamp, if one is available. |
| * |
| * @param timeUs Timestamp adjacent to which to find a synchronization sample. |
| * @return Index of the synchronization sample, or {@link C#INDEX_UNSET} if none. |
| */ |
| public int getIndexOfEarlierOrEqualSynchronizationSample(long timeUs) { |
| // Video frame timestamps may not be sorted, so the behavior of this call can be undefined. |
| // Frames are not reordered past synchronization samples so this works in practice. |
| int startIndex = Util.binarySearchFloor(timestampsUs, timeUs, true, false); |
| for (int i = startIndex; i >= 0; i--) { |
| if ((flags[i] & C.BUFFER_FLAG_KEY_FRAME) != 0) { |
| return i; |
| } |
| } |
| return C.INDEX_UNSET; |
| } |
| |
| /** |
| * Returns the sample index of the closest synchronization sample at or after the given timestamp, |
| * if one is available. |
| * |
| * @param timeUs Timestamp adjacent to which to find a synchronization sample. |
| * @return index Index of the synchronization sample, or {@link C#INDEX_UNSET} if none. |
| */ |
| public int getIndexOfLaterOrEqualSynchronizationSample(long timeUs) { |
| int startIndex = Util.binarySearchCeil(timestampsUs, timeUs, true, false); |
| for (int i = startIndex; i < timestampsUs.length; i++) { |
| if ((flags[i] & C.BUFFER_FLAG_KEY_FRAME) != 0) { |
| return i; |
| } |
| } |
| return C.INDEX_UNSET; |
| } |
| } |