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Add null-checker annotations to HlsSampleStreamWrapper

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PiperOrigin-RevId: 274545728
This commit is contained in:
ibaker 2019-10-14 11:32:49 +01:00 committed by Oliver Woodman
parent 6ebcac3883
commit 498a23e328
3 changed files with 28 additions and 18 deletions
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3
library/core/src/main/java/com/google/android/exoplayer2/Format.java
View file

@ -1472,7 +1472,8 @@ public final class Format implements Parcelable {
exoMediaCryptoType);
}
public Format copyWithExoMediaCryptoType(Class<? extends ExoMediaCrypto> exoMediaCryptoType) {
public Format copyWithExoMediaCryptoType(
@Nullable Class<? extends ExoMediaCrypto> exoMediaCryptoType) {
return new Format(
id,
label,

8
library/core/src/main/java/com/google/android/exoplayer2/util/Util.java
View file

@ -1239,9 +1239,9 @@ public final class Util {
* @param codecs A codec sequence string, as defined in RFC 6381.
* @param trackType One of {@link C}{@code .TRACK_TYPE_*}.
* @return A copy of {@code codecs} without the codecs whose track type doesn't match {@code
* trackType}.
* trackType}. If this ends up empty, or {@code codecs} is null, return null.
*/
public static @Nullable String getCodecsOfType(String codecs, int trackType) {
public static @Nullable String getCodecsOfType(@Nullable String codecs, int trackType) {
String[] codecArray = splitCodecs(codecs);
if (codecArray.length == 0) {
return null;
@ -1262,9 +1262,9 @@ public final class Util {
* Splits a codecs sequence string, as defined in RFC 6381, into individual codec strings.
*
* @param codecs A codec sequence string, as defined in RFC 6381.
* @return The split codecs, or an array of length zero if the input was empty.
* @return The split codecs, or an array of length zero if the input was empty or null.
*/
public static String[] splitCodecs(String codecs) {
public static String[] splitCodecs(@Nullable String codecs) {
if (TextUtils.isEmpty(codecs)) {
return new String[0];
}

35
library/hls/src/main/java/com/google/android/exoplayer2/source/hls/HlsSampleStreamWrapper.java
View file

@ -65,7 +65,9 @@ import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.checkerframework.checker.nullness.compatqual.NullableType;
import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
import org.checkerframework.checker.nullness.qual.RequiresNonNull;
/**
* Loads {@link HlsMediaChunk}s obtained from a {@link HlsChunkSource}, and provides
@ -127,20 +129,20 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
private int[] sampleQueueTrackIds;
private Set<Integer> sampleQueueMappingDoneByType;
private SparseIntArray sampleQueueIndicesByType;
private TrackOutput emsgUnwrappingTrackOutput;
@MonotonicNonNull private TrackOutput emsgUnwrappingTrackOutput;
private int primarySampleQueueType;
private int primarySampleQueueIndex;
private boolean sampleQueuesBuilt;
private boolean prepared;
private int enabledTrackGroupCount;
private Format upstreamTrackFormat;
private Format downstreamTrackFormat;
@MonotonicNonNull private Format upstreamTrackFormat;
@Nullable private Format downstreamTrackFormat;
private boolean released;
// Tracks are complicated in HLS. See documentation of buildTracksFromSampleStreams for details.
// Indexed by track (as exposed by this source).
private TrackGroupArray trackGroups;
private Set<TrackGroup> optionalTrackGroups;
@MonotonicNonNull private TrackGroupArray trackGroups;
@MonotonicNonNull private Set<TrackGroup> optionalTrackGroups;
// Indexed by track group.
private int[] trackGroupToSampleQueueIndex;
private int primaryTrackGroupIndex;
@ -294,15 +296,21 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
* @return Whether this wrapper requires the parent {@link HlsMediaPeriod} to perform a seek as
* part of the track selection.
*/
public boolean selectTracks(TrackSelection[] selections, boolean[] mayRetainStreamFlags,
SampleStream[] streams, boolean[] streamResetFlags, long positionUs, boolean forceReset) {
public boolean selectTracks(
TrackSelection[] selections,
boolean[] mayRetainStreamFlags,
@NullableType SampleStream[] streams,
boolean[] streamResetFlags,
long positionUs,
boolean forceReset) {
Assertions.checkState(prepared);
int oldEnabledTrackGroupCount = enabledTrackGroupCount;
// Deselect old tracks.
for (int i = 0; i < selections.length; i++) {
if (streams[i] != null && (selections[i] == null || !mayRetainStreamFlags[i])) {
HlsSampleStream stream = (HlsSampleStream) streams[i];
if (stream != null && (selections[i] == null || !mayRetainStreamFlags[i])) {
enabledTrackGroupCount--;
((HlsSampleStream) streams[i]).unbindSampleQueue();
stream.unbindSampleQueue();
streams[i] = null;
}
}
@ -536,7 +544,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
sampleQueueReaders[sampleQueueIndex].read(
formatHolder, buffer, requireFormat, loadingFinished, lastSeekPositionUs);
if (result == C.RESULT_FORMAT_READ) {
Format format = formatHolder.format;
Format format = Assertions.checkNotNull(formatHolder.format);
if (sampleQueueIndex == primarySampleQueueIndex) {
// Fill in primary sample format with information from the track format.
int chunkUid = sampleQueues[sampleQueueIndex].peekSourceId();
@ -945,7 +953,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
// Internal methods.
private void updateSampleStreams(SampleStream[] streams) {
private void updateSampleStreams(@NullableType SampleStream[] streams) {
hlsSampleStreams.clear();
for (SampleStream stream : streams) {
if (stream != null) {
@ -998,6 +1006,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
}
}
@RequiresNonNull("trackGroups")
private void mapSampleQueuesToMatchTrackGroups() {
int trackGroupCount = trackGroups.length;
trackGroupToSampleQueueIndex = new int[trackGroupCount];
@ -1195,7 +1204,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
* @return The derived track format.
*/
private static Format deriveFormat(
Format playlistFormat, Format sampleFormat, boolean propagateBitrate) {
@Nullable Format playlistFormat, Format sampleFormat, boolean propagateBitrate) {
if (playlistFormat == null) {
return sampleFormat;
}
@ -1383,7 +1392,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
int size,
int offset,
@Nullable CryptoData cryptoData) {
Assertions.checkState(format != null);
Assertions.checkNotNull(format);
ParsableByteArray sample = getSampleAndTrimBuffer(size, offset);
ParsableByteArray sampleForDelegate;
if (Util.areEqual(format.sampleMimeType, delegateFormat.sampleMimeType)) {