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Make metadata field nullable in FlacStreamMetadata

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This makes the format metadata null (instead of an empty Metadata
object) when it is not provided, and is therefore consistent with the
other extractors behavior.

PiperOrigin-RevId: 284171148
This commit is contained in:
kimvde 2019-12-06 14:07:28 +00:00 committed by Oliver Woodman
parent a5ee17ec26
commit 54413c26d4
24 changed files with 39 additions and 32 deletions
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2
extensions/flac/src/androidTest/assets/bear.flac.0.dump
View File

@ -24,7 +24,7 @@ track 0:
selectionFlags = 0
language = null
drmInitData = -
metadata = entries=[]
metadata = null
initializationData:
total output bytes = 526272
sample count = 33

2
extensions/flac/src/androidTest/assets/bear.flac.1.dump
View File

@ -24,7 +24,7 @@ track 0:
selectionFlags = 0
language = null
drmInitData = -
metadata = entries=[]
metadata = null
initializationData:
total output bytes = 362432
sample count = 23

2
extensions/flac/src/androidTest/assets/bear.flac.2.dump
View File

@ -24,7 +24,7 @@ track 0:
selectionFlags = 0
language = null
drmInitData = -
metadata = entries=[]
metadata = null
initializationData:
total output bytes = 182208
sample count = 12

2
extensions/flac/src/androidTest/assets/bear.flac.3.dump
View File

@ -24,7 +24,7 @@ track 0:
selectionFlags = 0
language = null
drmInitData = -
metadata = entries=[]
metadata = null
initializationData:
total output bytes = 18368
sample count = 2

1
extensions/flac/src/main/java/com/google/android/exoplayer2/ext/flac/FlacExtractor.java
View File

@ -212,6 +212,7 @@ public final class FlacExtractor implements Extractor {
input.getLength(),
extractorOutput,
outputFrameHolder);
@Nullable
Metadata metadata = streamMetadata.getMetadataCopyWithAppendedEntriesFrom(id3Metadata);
outputFormat(streamMetadata, metadata, trackOutput);
}

3
library/core/src/main/java/com/google/android/exoplayer2/extractor/FlacMetadataReader.java
View File

@ -81,7 +81,8 @@ public final class FlacMetadataReader {
throws IOException, InterruptedException {
@Nullable
Id3Decoder.FramePredicate id3FramePredicate = parseData ? null : Id3Decoder.NO_FRAMES_PREDICATE;
return new Id3Peeker().peekId3Data(input, id3FramePredicate);
@Nullable Metadata id3Metadata = new Id3Peeker().peekId3Data(input, id3FramePredicate);
return id3Metadata == null || id3Metadata.length() == 0 ? null : id3Metadata;
}
/**

25
library/core/src/main/java/com/google/android/exoplayer2/util/FlacStreamMetadata.java
View File

@ -80,8 +80,8 @@ public final class FlacStreamMetadata {
/** Total number of samples, or 0 if the value is unknown. */
public final long totalSamples;
/** Content metadata. */
private final Metadata metadata;
/** Content metadata, or {@code null} if it is not provided. */
@Nullable private final Metadata metadata;
/**
* Parses binary FLAC stream info metadata.
@ -102,7 +102,7 @@ public final class FlacStreamMetadata {
bitsPerSample = scratch.readBits(5) + 1;
bitsPerSampleLookupKey = getBitsPerSampleLookupKey(bitsPerSample);
totalSamples = scratch.readBitsToLong(36);
metadata = new Metadata();
metadata = null;
}
// Used in native code.
@ -138,7 +138,7 @@ public final class FlacStreamMetadata {
int channels,
int bitsPerSample,
long totalSamples,
Metadata metadata) {
@Nullable Metadata metadata) {
this.minBlockSizeSamples = minBlockSizeSamples;
this.maxBlockSizeSamples = maxBlockSizeSamples;
this.minFrameSize = minFrameSize;
@ -213,7 +213,7 @@ public final class FlacStreamMetadata {
// Set the last metadata block flag, ignore the other blocks.
streamMarkerAndInfoBlock[4] = (byte) 0x80;
int maxInputSize = maxFrameSize > 0 ? maxFrameSize : Format.NO_VALUE;
Metadata metadataWithId3 = metadata.copyWithAppendedEntriesFrom(id3Metadata);
@Nullable Metadata metadataWithId3 = getMetadataCopyWithAppendedEntriesFrom(id3Metadata);
return Format.createAudioSampleFormat(
/* id= */ null,
@ -234,14 +234,16 @@ public final class FlacStreamMetadata {
}
/** Returns a copy of the content metadata with entries from {@code other} appended. */
@Nullable
public Metadata getMetadataCopyWithAppendedEntriesFrom(@Nullable Metadata other) {
return metadata.copyWithAppendedEntriesFrom(other);
return metadata == null ? other : metadata.copyWithAppendedEntriesFrom(other);
}
/** Returns a copy of {@code this} with the given Vorbis comments added to the metadata. */
public FlacStreamMetadata copyWithVorbisComments(List<String> vorbisComments) {
@Nullable
Metadata appendedMetadata =
metadata.copyWithAppendedEntriesFrom(
getMetadataCopyWithAppendedEntriesFrom(
buildMetadata(vorbisComments, Collections.emptyList()));
return new FlacStreamMetadata(
minBlockSizeSamples,
@ -257,8 +259,10 @@ public final class FlacStreamMetadata {
/** Returns a copy of {@code this} with the given picture frames added to the metadata. */
public FlacStreamMetadata copyWithPictureFrames(List<PictureFrame> pictureFrames) {
@Nullable
Metadata appendedMetadata =
metadata.copyWithAppendedEntriesFrom(buildMetadata(Collections.emptyList(), pictureFrames));
getMetadataCopyWithAppendedEntriesFrom(
buildMetadata(Collections.emptyList(), pictureFrames));
return new FlacStreamMetadata(
minBlockSizeSamples,
maxBlockSizeSamples,
@ -317,10 +321,11 @@ public final class FlacStreamMetadata {
}
}
@Nullable
private static Metadata buildMetadata(
List<String> vorbisComments, List<PictureFrame> pictureFrames) {
if (vorbisComments.isEmpty() && pictureFrames.isEmpty()) {
return new Metadata();
return null;
}
ArrayList<Metadata.Entry> metadataEntries = new ArrayList<>();
@ -336,6 +341,6 @@ public final class FlacStreamMetadata {
}
metadataEntries.addAll(pictureFrames);
return metadataEntries.isEmpty() ? new Metadata() : new Metadata(metadataEntries);
return metadataEntries.isEmpty() ? null : new Metadata(metadataEntries);
}
}

2
library/core/src/test/assets/flac/bear.flac.0.dump
View File

@ -24,7 +24,7 @@ track 0:
selectionFlags = 0
language = null
drmInitData = -
metadata = entries=[]
metadata = null
initializationData:
data = length 42, hash 83F6895
total output bytes = 164431

2
library/core/src/test/assets/flac/bear_no_min_max_frame_size.flac.0.dump
View File

@ -24,7 +24,7 @@ track 0:
selectionFlags = 0
language = null
drmInitData = -
metadata = entries=[]
metadata = null
initializationData:
data = length 42, hash 9218FDB7
total output bytes = 164431

2
library/core/src/test/assets/flac/bear_no_num_samples.flac.0.dump
View File

@ -24,7 +24,7 @@ track 0:
selectionFlags = 0
language = null
drmInitData = -
metadata = entries=[]
metadata = null
initializationData:
data = length 42, hash 49FA2C21
total output bytes = 164431

2
library/core/src/test/assets/flac/bear_one_metadata_block.flac.0.dump
View File

@ -24,7 +24,7 @@ track 0:
selectionFlags = 0
language = null
drmInitData = -
metadata = entries=[]
metadata = null
initializationData:
data = length 42, hash 83F6895
total output bytes = 164431

2
library/core/src/test/assets/flac/bear_uncommon_sample_rate.flac.0.dump
View File

@ -24,7 +24,7 @@ track 0:
selectionFlags = 0
language = null
drmInitData = -
metadata = entries=[]
metadata = null
initializationData:
data = length 42, hash 7249A1B8
total output bytes = 144086

2
library/core/src/test/assets/flac/bear_with_id3_disabled.flac.0.dump
View File

@ -24,7 +24,7 @@ track 0:
selectionFlags = 0
language = null
drmInitData = -
metadata = entries=[]
metadata = null
initializationData:
data = length 42, hash 83F6895
total output bytes = 164431

2
library/core/src/test/assets/ogg/bear_flac.ogg.0.dump
View File

@ -24,7 +24,7 @@ track 0:
selectionFlags = 0
language = null
drmInitData = -
metadata = entries=[]
metadata = null
initializationData:
data = length 42, hash 83F6895
total output bytes = 164431

2
library/core/src/test/assets/ogg/bear_flac.ogg.1.dump
View File

@ -24,7 +24,7 @@ track 0:
selectionFlags = 0
language = null
drmInitData = -
metadata = entries=[]
metadata = null
initializationData:
data = length 42, hash 83F6895
total output bytes = 113666

2
library/core/src/test/assets/ogg/bear_flac.ogg.2.dump
View File

@ -24,7 +24,7 @@ track 0:
selectionFlags = 0
language = null
drmInitData = -
metadata = entries=[]
metadata = null
initializationData:
data = length 42, hash 83F6895
total output bytes = 55652

2
library/core/src/test/assets/ogg/bear_flac.ogg.3.dump
View File

@ -24,7 +24,7 @@ track 0:
selectionFlags = 0
language = null
drmInitData = -
metadata = entries=[]
metadata = null
initializationData:
data = length 42, hash 83F6895
total output bytes = 445

2
library/core/src/test/assets/ogg/bear_flac.ogg.unklen.dump
View File

@ -24,7 +24,7 @@ track 0:
selectionFlags = 0
language = null
drmInitData = -
metadata = entries=[]
metadata = null
initializationData:
data = length 42, hash 83F6895
total output bytes = 164431

2
library/core/src/test/assets/ogg/bear_flac_noseektable.ogg.0.dump
View File

@ -24,7 +24,7 @@ track 0:
selectionFlags = 0
language = null
drmInitData = -
metadata = entries=[]
metadata = null
initializationData:
data = length 42, hash 83F6895
total output bytes = 164431

2
library/core/src/test/assets/ogg/bear_flac_noseektable.ogg.1.dump
View File

@ -24,7 +24,7 @@ track 0:
selectionFlags = 0
language = null
drmInitData = -
metadata = entries=[]
metadata = null
initializationData:
data = length 42, hash 83F6895
total output bytes = 113666

2
library/core/src/test/assets/ogg/bear_flac_noseektable.ogg.2.dump
View File

@ -24,7 +24,7 @@ track 0:
selectionFlags = 0
language = null
drmInitData = -
metadata = entries=[]
metadata = null
initializationData:
data = length 42, hash 83F6895
total output bytes = 55652

2
library/core/src/test/assets/ogg/bear_flac_noseektable.ogg.3.dump
View File

@ -24,7 +24,7 @@ track 0:
selectionFlags = 0
language = null
drmInitData = -
metadata = entries=[]
metadata = null
initializationData:
data = length 42, hash 83F6895
total output bytes = 445

2
library/core/src/test/assets/ogg/bear_flac_noseektable.ogg.unklen.dump
View File

@ -24,7 +24,7 @@ track 0:
selectionFlags = 0
language = null
drmInitData = -
metadata = entries=[]
metadata = null
initializationData:
data = length 42, hash 83F6895
total output bytes = 164431

2
library/core/src/test/java/com/google/android/exoplayer2/util/FlacStreamMetadataTest.java
View File

@ -75,7 +75,7 @@ public final class FlacStreamMetadataTest {
/* pictureFrames= */ new ArrayList<>())
.getMetadataCopyWithAppendedEntriesFrom(/* other= */ null);
assertThat(metadata.length()).isEqualTo(0);
assertThat(metadata).isNull();
}
@Test