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Simplify nullability in Mp4Extractor

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PiperOrigin-RevId: 437002406
This commit is contained in:
aquilescanta 2022-03-24 15:38:20 +00:00 committed by Ian Baker
parent c83a28f260
commit e8b0971f12
1 changed files with 8 additions and 9 deletions
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17
libraries/extractor/src/main/java/androidx/media3/extractor/mp4/Mp4Extractor.java
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@ -15,7 +15,6 @@
*/
package androidx.media3.extractor.mp4;
import static androidx.media3.common.util.Assertions.checkNotNull;
import static androidx.media3.common.util.Util.castNonNull;
import static androidx.media3.extractor.mp4.AtomParsers.parseTraks;
import static androidx.media3.extractor.mp4.Sniffer.BRAND_HEIC;
@ -165,8 +164,8 @@ public final class Mp4Extractor implements Extractor, SeekMap {
private int sampleCurrentNalBytesRemaining;
// Extractor outputs.
private @MonotonicNonNull ExtractorOutput extractorOutput;
private Mp4Track @MonotonicNonNull [] tracks;
private ExtractorOutput extractorOutput;
private Mp4Track[] tracks;
private long @MonotonicNonNull [][] accumulatedSampleSizes;
private int firstVideoTrackIndex;
@ -197,6 +196,8 @@ public final class Mp4Extractor implements Extractor, SeekMap {
nalLength = new ParsableByteArray(4);
scratch = new ParsableByteArray();
sampleTrackIndex = C.INDEX_UNSET;
extractorOutput = ExtractorOutput.PLACEHOLDER;
tracks = new Mp4Track[0];
}
@Override
@ -227,7 +228,7 @@ public final class Mp4Extractor implements Extractor, SeekMap {
sefReader.reset();
slowMotionMetadataEntries.clear();
}
} else if (tracks != null) {
} else {
for (Mp4Track track : tracks) {
updateSampleIndex(track, timeUs);
if (track.trueHdSampleRechunker != null) {
@ -280,7 +281,7 @@ public final class Mp4Extractor implements Extractor, SeekMap {
@Override
public SeekPoints getSeekPoints(long timeUs) {
if (checkNotNull(tracks).length == 0) {
if (tracks.length == 0) {
return new SeekPoints(SeekPoint.START);
}
@ -502,7 +503,6 @@ public final class Mp4Extractor implements Extractor, SeekMap {
isQuickTime,
/* modifyTrackFunction= */ track -> track);
ExtractorOutput extractorOutput = checkNotNull(this.extractorOutput);
int trackCount = trackSampleTables.size();
for (int i = 0; i < trackCount; i++) {
TrackSampleTable trackSampleTable = trackSampleTables.get(i);
@ -582,7 +582,7 @@ public final class Mp4Extractor implements Extractor, SeekMap {
return RESULT_END_OF_INPUT;
}
}
Mp4Track track = castNonNull(tracks)[sampleTrackIndex];
Mp4Track track = tracks[sampleTrackIndex];
TrackOutput trackOutput = track.trackOutput;
int sampleIndex = track.sampleIndex;
long position = track.sampleTable.offsets[sampleIndex];
@ -699,7 +699,7 @@ public final class Mp4Extractor implements Extractor, SeekMap {
long minAccumulatedBytes = Long.MAX_VALUE;
boolean minAccumulatedBytesRequiresReload = true;
int minAccumulatedBytesTrackIndex = C.INDEX_UNSET;
for (int trackIndex = 0; trackIndex < castNonNull(tracks).length; trackIndex++) {
for (int trackIndex = 0; trackIndex < tracks.length; trackIndex++) {
Mp4Track track = tracks[trackIndex];
int sampleIndex = track.sampleIndex;
if (sampleIndex == track.sampleTable.sampleCount) {
@ -744,7 +744,6 @@ public final class Mp4Extractor implements Extractor, SeekMap {
private void processEndOfStreamReadingAtomHeader() {
if (fileType == FILE_TYPE_HEIC && (flags & FLAG_READ_MOTION_PHOTO_METADATA) != 0) {
// Add image track and prepare media.
ExtractorOutput extractorOutput = checkNotNull(this.extractorOutput);
TrackOutput trackOutput = extractorOutput.track(/* id= */ 0, C.TRACK_TYPE_IMAGE);
@Nullable
Metadata metadata = motionPhotoMetadata == null ? null : new Metadata(motionPhotoMetadata);