/*
* Copyright 2020 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.transformer;
import static androidx.media3.common.util.Util.minValue;
import android.util.SparseLongArray;
import androidx.media3.common.C;
import androidx.media3.common.PlaybackParameters;
import androidx.media3.exoplayer.MediaClock;
/* package */ final class TransformerMediaClock implements MediaClock {
private final SparseLongArray trackTypeToTimeUs;
private long minTrackTimeUs;
public TransformerMediaClock() {
trackTypeToTimeUs = new SparseLongArray();
}
/**
* Updates the time for a given track type. The clock time is computed based on the different
* track times.
*/
public void updateTimeForTrackType(@C.TrackType int trackType, long timeUs) {
long previousTimeUs = trackTypeToTimeUs.get(trackType, /* valueIfKeyNotFound= */ C.TIME_UNSET);
if (previousTimeUs != C.TIME_UNSET && timeUs <= previousTimeUs) {
// Make sure that the track times are increasing and therefore that the clock time is
// increasing. This is necessary for progress updates.
return;
}
trackTypeToTimeUs.put(trackType, timeUs);
if (previousTimeUs == C.TIME_UNSET || previousTimeUs == minTrackTimeUs) {
minTrackTimeUs = minValue(trackTypeToTimeUs);
}
}
@Override
public long getPositionUs() {
// Use minimum position among tracks as position to ensure that the buffered duration is
// positive. This is also useful for controlling samples interleaving.
return minTrackTimeUs;
}
@Override
public void setPlaybackParameters(PlaybackParameters playbackParameters) {}
@Override
public PlaybackParameters getPlaybackParameters() {
// Playback parameters are unknown. Set default value.
return PlaybackParameters.DEFAULT;
}
}