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Duration readers: Return TIME_UNSET rather than a negative value

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This typically happens if there's a discontinuity in the stream.
It's better to say we don't know, than it is to return a negative
position.

Issue: #8346
#exofixit
#minor-release
PiperOrigin-RevId: 395224088
This commit is contained in:
olly 2021-09-07 13:09:53 +01:00 committed by Christos Tsilopoulos
parent 140e110e44
commit ced4232fd8
2 changed files with 14 additions and 0 deletions
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7
library/extractor/src/main/java/com/google/android/exoplayer2/extractor/ts/PsDurationReader.java
View file

@ -21,6 +21,7 @@ import com.google.android.exoplayer2.C;
import com.google.android.exoplayer2.extractor.Extractor;
import com.google.android.exoplayer2.extractor.ExtractorInput;
import com.google.android.exoplayer2.extractor.PositionHolder;
import com.google.android.exoplayer2.util.Log;
import com.google.android.exoplayer2.util.ParsableByteArray;
import com.google.android.exoplayer2.util.TimestampAdjuster;
import com.google.android.exoplayer2.util.Util;
@ -41,6 +42,8 @@ import java.io.IOException;
*/
/* package */ final class PsDurationReader {
private static final String TAG = "PsDurationReader";
private static final int TIMESTAMP_SEARCH_BYTES = 20_000;
private final TimestampAdjuster scrTimestampAdjuster;
@ -102,6 +105,10 @@ import java.io.IOException;
long minScrPositionUs = scrTimestampAdjuster.adjustTsTimestamp(firstScrValue);
long maxScrPositionUs = scrTimestampAdjuster.adjustTsTimestamp(lastScrValue);
durationUs = maxScrPositionUs - minScrPositionUs;
if (durationUs < 0) {
Log.w(TAG, "Invalid duration: " + durationUs + ". Using TIME_UNSET instead.");
durationUs = C.TIME_UNSET;
}
return finishReadDuration(input);
}

7
library/extractor/src/main/java/com/google/android/exoplayer2/extractor/ts/TsDurationReader.java
View file

@ -21,6 +21,7 @@ import com.google.android.exoplayer2.C;
import com.google.android.exoplayer2.extractor.Extractor;
import com.google.android.exoplayer2.extractor.ExtractorInput;
import com.google.android.exoplayer2.extractor.PositionHolder;
import com.google.android.exoplayer2.util.Log;
import com.google.android.exoplayer2.util.ParsableByteArray;
import com.google.android.exoplayer2.util.TimestampAdjuster;
import com.google.android.exoplayer2.util.Util;
@ -38,6 +39,8 @@ import java.io.IOException;
*/
/* package */ final class TsDurationReader {
private static final String TAG = "TsDurationReader";
private final int timestampSearchBytes;
private final TimestampAdjuster pcrTimestampAdjuster;
private final ParsableByteArray packetBuffer;
@ -98,6 +101,10 @@ import java.io.IOException;
long minPcrPositionUs = pcrTimestampAdjuster.adjustTsTimestamp(firstPcrValue);
long maxPcrPositionUs = pcrTimestampAdjuster.adjustTsTimestamp(lastPcrValue);
durationUs = maxPcrPositionUs - minPcrPositionUs;
if (durationUs < 0) {
Log.w(TAG, "Invalid duration: " + durationUs + ". Using TIME_UNSET instead.");
durationUs = C.TIME_UNSET;
}
return finishReadDuration(input);
}