| /* |
| * Copyright (C) 2017 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.text.ssa; |
| |
| import com.google.android.exoplayer2.C; |
| import com.google.android.exoplayer2.text.Cue; |
| import com.google.android.exoplayer2.text.Subtitle; |
| import com.google.android.exoplayer2.util.Assertions; |
| import com.google.android.exoplayer2.util.Util; |
| import java.util.Collections; |
| import java.util.List; |
| |
| /** A representation of an SSA/ASS subtitle. */ |
| /* package */ final class SsaSubtitle implements Subtitle { |
| |
| private final List<List<Cue>> cues; |
| private final List<Long> cueTimesUs; |
| |
| /** |
| * @param cues The cues in the subtitle. |
| * @param cueTimesUs The cue times, in microseconds. |
| */ |
| public SsaSubtitle(List<List<Cue>> cues, List<Long> cueTimesUs) { |
| this.cues = cues; |
| this.cueTimesUs = cueTimesUs; |
| } |
| |
| @Override |
| public int getNextEventTimeIndex(long timeUs) { |
| int index = Util.binarySearchCeil(cueTimesUs, timeUs, false, false); |
| return index < cueTimesUs.size() ? index : C.INDEX_UNSET; |
| } |
| |
| @Override |
| public int getEventTimeCount() { |
| return cueTimesUs.size(); |
| } |
| |
| @Override |
| public long getEventTime(int index) { |
| Assertions.checkArgument(index >= 0); |
| Assertions.checkArgument(index < cueTimesUs.size()); |
| return cueTimesUs.get(index); |
| } |
| |
| @Override |
| public List<Cue> getCues(long timeUs) { |
| int index = Util.binarySearchFloor(cueTimesUs, timeUs, true, false); |
| if (index == -1) { |
| // timeUs is earlier than the start of the first cue. |
| return Collections.emptyList(); |
| } else { |
| return cues.get(index); |
| } |
| } |
| } |