SingleSampleSeekMap.java
/*
* Copyright 2023 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 androidx.media3.extractor;
import androidx.media3.common.C;
import androidx.media3.common.util.UnstableApi;
/**
* A {@link SeekMap} implementation that maps the given point back onto itself.
*
* <p>Used for single sample media.
*/
@UnstableApi
public final class SingleSampleSeekMap implements SeekMap {
private final long durationUs;
private final long startPosition;
/**
* Creates an instance with {@code startPosition} set to 0.
*
* @param durationUs The duration of the stream in microseconds, or {@link C#TIME_UNSET} if the
* duration is unknown.
*/
public SingleSampleSeekMap(long durationUs) {
this(durationUs, /* startPosition= */ 0);
}
/**
* Creates an instance.
*
* @param durationUs The duration of the stream in microseconds, or {@link C#TIME_UNSET} if the
* duration is unknown.
* @param startPosition The position (byte offset) of the start of the media.
*/
public SingleSampleSeekMap(long durationUs, long startPosition) {
this.durationUs = durationUs;
this.startPosition = startPosition;
}
@Override
public boolean isSeekable() {
return true;
}
@Override
public long getDurationUs() {
return durationUs;
}
@Override
public SeekPoints getSeekPoints(long timeUs) {
return new SeekPoints(new SeekPoint(timeUs, startPosition));
}
}