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/*
* 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.metadata.scte35;
import android.os.Parcel;
import org.mozilla.thirdparty.com.google.android.exoplayer2.C;
import org.mozilla.thirdparty.com.google.android.exoplayer2.util.ParsableByteArray;
import org.mozilla.thirdparty.com.google.android.exoplayer2.util.TimestampAdjuster;
/**
* Represents a time signal command as defined in SCTE35, Section 9.3.4.
*/
public final class TimeSignalCommand extends SpliceCommand {
/**
* A PTS value, as defined in SCTE35, Section 9.3.4.
*/
public final long ptsTime;
/**
* Equivalent to {@link #ptsTime} but in the playback timebase.
*/
public final long playbackPositionUs;
private TimeSignalCommand(long ptsTime, long playbackPositionUs) {
this.ptsTime = ptsTime;
this.playbackPositionUs = playbackPositionUs;
}
/* package */ static TimeSignalCommand parseFromSection(ParsableByteArray sectionData,
long ptsAdjustment, TimestampAdjuster timestampAdjuster) {
long ptsTime = parseSpliceTime(sectionData, ptsAdjustment);
long playbackPositionUs = timestampAdjuster.adjustTsTimestamp(ptsTime);
return new TimeSignalCommand(ptsTime, playbackPositionUs);
}
/**
* Parses pts_time from splice_time(), defined in Section 9.4.1. Returns {@link C#TIME_UNSET}, if
* time_specified_flag is false.
*
* @param sectionData The section data from which the pts_time is parsed.
* @param ptsAdjustment The pts adjustment provided by the splice info section header.
* @return The pts_time defined by splice_time(), or {@link C#TIME_UNSET}, if time_specified_flag
* is false.
*/
/* package */ static long parseSpliceTime(ParsableByteArray sectionData, long ptsAdjustment) {
long firstByte = sectionData.readUnsignedByte();
long ptsTime = C.TIME_UNSET;
if ((firstByte & 0x80) != 0 /* time_specified_flag */) {
// See SCTE35 9.2.1 for more information about pts adjustment.
ptsTime = (firstByte & 0x01) << 32 | sectionData.readUnsignedInt();
ptsTime += ptsAdjustment;
ptsTime &= 0x1FFFFFFFFL;
}
return ptsTime;
}
// Parcelable implementation.
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeLong(ptsTime);
dest.writeLong(playbackPositionUs);
}
public static final Creator<TimeSignalCommand> CREATOR =
new Creator<TimeSignalCommand>() {
@Override
public TimeSignalCommand createFromParcel(Parcel in) {
return new TimeSignalCommand(in.readLong(), in.readLong());
}
@Override
public TimeSignalCommand[] newArray(int size) {
return new TimeSignalCommand[size];
}
};
}
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