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Add opus metadata parsing

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Add metadata parsing for the Opus format.
This commit is contained in:
OxygenCobalt 2022-01-09 15:54:24 -07:00
parent 60df845d4a
commit 435e7d5a81
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2 changed files with 46 additions and 12 deletions
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55
library/extractor/src/main/java/com/google/android/exoplayer2/extractor/ogg/OpusReader.java
View File

@ -17,10 +17,16 @@ package com.google.android.exoplayer2.extractor.ogg;
import static com.google.android.exoplayer2.util.Assertions.checkNotNull;
import androidx.annotation.Nullable;
import com.google.android.exoplayer2.Format;
import com.google.android.exoplayer2.audio.OpusUtil;
import com.google.android.exoplayer2.extractor.VorbisUtil;
import com.google.android.exoplayer2.metadata.Metadata;
import com.google.android.exoplayer2.util.MimeTypes;
import com.google.android.exoplayer2.util.ParsableByteArray;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import org.checkerframework.checker.nullness.qual.EnsuresNonNullIf;
@ -28,18 +34,18 @@ import org.checkerframework.checker.nullness.qual.EnsuresNonNullIf;
/** {@link StreamReader} to extract Opus data out of Ogg byte stream. */
/* package */ final class OpusReader extends StreamReader {
private static final int OPUS_CODE = 0x4f707573;
private static final byte[] OPUS_SIGNATURE = {'O', 'p', 'u', 's', 'H', 'e', 'a', 'd'};
private static final byte[] OPUS_ID_SIGNATURE = {'O', 'p', 'u', 's', 'H', 'e', 'a', 'd'};
private static final byte[] OPUS_TAG_SIGNATURE = {'O', 'p', 'u', 's', 'T', 'a', 'g', 's'};
private boolean headerRead;
public static boolean verifyBitstreamType(ParsableByteArray data) {
if (data.bytesLeft() < OPUS_SIGNATURE.length) {
if (data.bytesLeft() < OPUS_ID_SIGNATURE.length) {
return false;
}
byte[] header = new byte[OPUS_SIGNATURE.length];
data.readBytes(header, 0, OPUS_SIGNATURE.length);
return Arrays.equals(header, OPUS_SIGNATURE);
byte[] header = new byte[OPUS_ID_SIGNATURE.length];
data.readBytes(header, 0, OPUS_ID_SIGNATURE.length);
return Arrays.equals(header, OPUS_ID_SIGNATURE);
}
@Override
@ -57,7 +63,8 @@ import org.checkerframework.checker.nullness.qual.EnsuresNonNullIf;
@Override
@EnsuresNonNullIf(expression = "#3.format", result = false)
protected boolean readHeaders(ParsableByteArray packet, long position, SetupData setupData) {
protected boolean readHeaders(ParsableByteArray packet, long position, SetupData setupData)
throws IOException {
if (!headerRead) {
byte[] headerBytes = Arrays.copyOf(packet.getData(), packet.limit());
int channelCount = OpusUtil.getChannelCount(headerBytes);
@ -69,13 +76,41 @@ import org.checkerframework.checker.nullness.qual.EnsuresNonNullIf;
.setSampleRate(OpusUtil.SAMPLE_RATE)
.setInitializationData(initializationData)
.build();
headerRead = true;
return true;
} else {
checkNotNull(setupData.format); // Has been set when the header was read.
boolean headerPacket = packet.readInt() == OPUS_CODE;
packet.setPosition(0);
return headerPacket;
// Handle the comments frame if we are working with one.
boolean isComment;
if (packet.bytesLeft() < OPUS_TAG_SIGNATURE.length) {
isComment = false;
} else {
byte[] header = new byte[OPUS_TAG_SIGNATURE.length];
packet.readBytes(header, 0, OPUS_TAG_SIGNATURE.length);
isComment = Arrays.equals(header, OPUS_TAG_SIGNATURE);
}
if (isComment) {
VorbisUtil.CommentHeader commentHeader = VorbisUtil.readVorbisCommentHeader(
packet, false, false);
@Nullable Metadata vorbisMetadata = VorbisUtil.buildMetadata(
Arrays.asList(commentHeader.comments)
);
setupData.format = setupData.format
.buildUpon()
.setMetadata(vorbisMetadata)
.build();
return true;
} else {
packet.setPosition(0);
return false;
}
}
}

3
library/extractor/src/main/java/com/google/android/exoplayer2/extractor/ogg/VorbisReader.java
View File

@ -114,8 +114,7 @@ import org.checkerframework.checker.nullness.qual.EnsuresNonNullIf;
codecInitializationData.add(vorbisSetup.setupHeaderData);
@Nullable Metadata vorbisMetadata = VorbisUtil.buildMetadata(
Arrays.asList(vorbisSetup.commentHeader.comments)
);
Arrays.asList(vorbisSetup.commentHeader.comments));
setupData.format =
new Format.Builder()