com.google.android.exoplayer2.util.NalUnitUtil Java Examples

MatroskaExtractor(EbmlReader reader, @Flags int flags) {
  this.reader = reader;
  this.reader.init(new InnerEbmlProcessor());
  seekForCuesEnabled = (flags & FLAG_DISABLE_SEEK_FOR_CUES) == 0;
  varintReader = new VarintReader();
  tracks = new SparseArray<>();
  scratch = new ParsableByteArray(4);
  vorbisNumPageSamples = new ParsableByteArray(ByteBuffer.allocate(4).putInt(-1).array());
  seekEntryIdBytes = new ParsableByteArray(4);
  nalStartCode = new ParsableByteArray(NalUnitUtil.NAL_START_CODE);
  nalLength = new ParsableByteArray(4);
  sampleStrippedBytes = new ParsableByteArray();
  subtitleSample = new ParsableByteArray();
  encryptionInitializationVector = new ParsableByteArray(ENCRYPTION_IV_SIZE);
  encryptionSubsampleData = new ParsableByteArray();
}
 

/**
 * @param flags Flags that control the extractor's behavior.
 * @param timestampAdjuster Adjusts sample timestamps. May be null if no adjustment is needed.
 * @param sideloadedTrack Sideloaded track information, in the case that the extractor
 *     will not receive a moov box in the input data.
 */
public FragmentedMp4Extractor(@Flags int flags, TimestampAdjuster timestampAdjuster,
    Track sideloadedTrack) {
  this.flags = flags | (sideloadedTrack != null ? FLAG_SIDELOADED : 0);
  this.timestampAdjuster = timestampAdjuster;
  this.sideloadedTrack = sideloadedTrack;
  atomHeader = new ParsableByteArray(Atom.LONG_HEADER_SIZE);
  nalStartCode = new ParsableByteArray(NalUnitUtil.NAL_START_CODE);
  nalPrefix = new ParsableByteArray(5);
  nalBuffer = new ParsableByteArray();
  encryptionSignalByte = new ParsableByteArray(1);
  extendedTypeScratch = new byte[16];
  containerAtoms = new Stack<>();
  pendingMetadataSampleInfos = new LinkedList<>();
  trackBundles = new SparseArray<>();
  durationUs = C.TIME_UNSET;
  segmentIndexEarliestPresentationTimeUs = C.TIME_UNSET;
  enterReadingAtomHeaderState();
}
 

MatroskaExtractor(EbmlReader reader, @Flags int flags) {
  this.reader = reader;
  this.reader.init(new InnerEbmlReaderOutput());
  seekForCuesEnabled = (flags & FLAG_DISABLE_SEEK_FOR_CUES) == 0;
  varintReader = new VarintReader();
  tracks = new SparseArray<>();
  scratch = new ParsableByteArray(4);
  vorbisNumPageSamples = new ParsableByteArray(ByteBuffer.allocate(4).putInt(-1).array());
  seekEntryIdBytes = new ParsableByteArray(4);
  nalStartCode = new ParsableByteArray(NalUnitUtil.NAL_START_CODE);
  nalLength = new ParsableByteArray(4);
  sampleStrippedBytes = new ParsableByteArray();
  subtitleSample = new ParsableByteArray();
  encryptionInitializationVector = new ParsableByteArray(ENCRYPTION_IV_SIZE);
  encryptionSubsampleData = new ParsableByteArray();
}
 

MatroskaExtractor(EbmlReader reader, @Flags int flags) {
  this.reader = reader;
  this.reader.init(new InnerEbmlReaderOutput());
  seekForCuesEnabled = (flags & FLAG_DISABLE_SEEK_FOR_CUES) == 0;
  varintReader = new VarintReader();
  tracks = new SparseArray<>();
  scratch = new ParsableByteArray(4);
  vorbisNumPageSamples = new ParsableByteArray(ByteBuffer.allocate(4).putInt(-1).array());
  seekEntryIdBytes = new ParsableByteArray(4);
  nalStartCode = new ParsableByteArray(NalUnitUtil.NAL_START_CODE);
  nalLength = new ParsableByteArray(4);
  sampleStrippedBytes = new ParsableByteArray();
  subtitleSample = new ParsableByteArray();
  encryptionInitializationVector = new ParsableByteArray(ENCRYPTION_IV_SIZE);
  encryptionSubsampleData = new ParsableByteArray();
}
 

MatroskaExtractor(EbmlReader reader, @Flags int flags) {
  this.reader = reader;
  this.reader.init(new InnerEbmlProcessor());
  seekForCuesEnabled = (flags & FLAG_DISABLE_SEEK_FOR_CUES) == 0;
  varintReader = new VarintReader();
  tracks = new SparseArray<>();
  scratch = new ParsableByteArray(4);
  vorbisNumPageSamples = new ParsableByteArray(ByteBuffer.allocate(4).putInt(-1).array());
  seekEntryIdBytes = new ParsableByteArray(4);
  nalStartCode = new ParsableByteArray(NalUnitUtil.NAL_START_CODE);
  nalLength = new ParsableByteArray(4);
  sampleStrippedBytes = new ParsableByteArray();
  subtitleSample = new ParsableByteArray();
  encryptionInitializationVector = new ParsableByteArray(ENCRYPTION_IV_SIZE);
  encryptionSubsampleData = new ParsableByteArray();
  blockAdditionalData = new ParsableByteArray();
}
 

MatroskaExtractor(EbmlReader reader, @Flags int flags) {
  this.reader = reader;
  this.reader.init(new InnerEbmlProcessor());
  seekForCuesEnabled = (flags & FLAG_DISABLE_SEEK_FOR_CUES) == 0;
  varintReader = new VarintReader();
  tracks = new SparseArray<>();
  scratch = new ParsableByteArray(4);
  vorbisNumPageSamples = new ParsableByteArray(ByteBuffer.allocate(4).putInt(-1).array());
  seekEntryIdBytes = new ParsableByteArray(4);
  nalStartCode = new ParsableByteArray(NalUnitUtil.NAL_START_CODE);
  nalLength = new ParsableByteArray(4);
  sampleStrippedBytes = new ParsableByteArray();
  subtitleSample = new ParsableByteArray();
  encryptionInitializationVector = new ParsableByteArray(ENCRYPTION_IV_SIZE);
  encryptionSubsampleData = new ParsableByteArray();
}
 

MatroskaExtractor(EbmlReader reader) {
  this.reader = reader;
  this.reader.init(new InnerEbmlReaderOutput());
  varintReader = new VarintReader();
  tracks = new SparseArray<>();
  scratch = new ParsableByteArray(4);
  vorbisNumPageSamples = new ParsableByteArray(ByteBuffer.allocate(4).putInt(-1).array());
  seekEntryIdBytes = new ParsableByteArray(4);
  nalStartCode = new ParsableByteArray(NalUnitUtil.NAL_START_CODE);
  nalLength = new ParsableByteArray(4);
  sampleStrippedBytes = new ParsableByteArray();
  subripSample = new ParsableByteArray();
  encryptionInitializationVector = new ParsableByteArray(ENCRYPTION_IV_SIZE);
  encryptionSubsampleData = new ParsableByteArray();
}
 

@Override
public void seek() {
  NalUnitUtil.clearPrefixFlags(prefixFlags);
  csdBuffer.reset();
  if (userDataReader != null) {
    userData.reset();
  }
  totalBytesWritten = 0;
  startedFirstSample = false;
}
 

@Override
public void seek() {
  NalUnitUtil.clearPrefixFlags(prefixFlags);
  vps.reset();
  sps.reset();
  pps.reset();
  prefixSei.reset();
  suffixSei.reset();
  sampleReader.reset();
  totalBytesWritten = 0;
}
 

@Override
public void seek() {
  NalUnitUtil.clearPrefixFlags(prefixFlags);
  sps.reset();
  pps.reset();
  sei.reset();
  sampleReader.reset();
  totalBytesWritten = 0;
}
 

@Override
public void seek() {
  NalUnitUtil.clearPrefixFlags(prefixFlags);
  csdBuffer.reset();
  if (userDataReader != null) {
    userData.reset();
  }
  totalBytesWritten = 0;
  startedFirstSample = false;
}
 

/**
 * Parses AVC configuration data.
 *
 * @param data A {@link ParsableByteArray}, whose position is set to the start of the AVC
 *     configuration data to parse.
 * @return A parsed representation of the HEVC configuration data.
 * @throws ParserException If an error occurred parsing the data.
 */
public static AvcConfig parse(ParsableByteArray data) throws ParserException {
  try {
    data.skipBytes(4); // Skip to the AVCDecoderConfigurationRecord (defined in 14496-15)
    int nalUnitLengthFieldLength = (data.readUnsignedByte() & 0x3) + 1;
    if (nalUnitLengthFieldLength == 3) {
      throw new IllegalStateException();
    }
    List<byte[]> initializationData = new ArrayList<>();
    int numSequenceParameterSets = data.readUnsignedByte() & 0x1F;
    for (int j = 0; j < numSequenceParameterSets; j++) {
      initializationData.add(buildNalUnitForChild(data));
    }
    int numPictureParameterSets = data.readUnsignedByte();
    for (int j = 0; j < numPictureParameterSets; j++) {
      initializationData.add(buildNalUnitForChild(data));
    }

    int width = Format.NO_VALUE;
    int height = Format.NO_VALUE;
    float pixelWidthAspectRatio = 1;
    if (numSequenceParameterSets > 0) {
      byte[] sps = initializationData.get(0);
      SpsData spsData = NalUnitUtil.parseSpsNalUnit(initializationData.get(0),
          nalUnitLengthFieldLength, sps.length);
      width = spsData.width;
      height = spsData.height;
      pixelWidthAspectRatio = spsData.pixelWidthAspectRatio;
    }
    return new AvcConfig(initializationData, nalUnitLengthFieldLength, width, height,
        pixelWidthAspectRatio);
  } catch (ArrayIndexOutOfBoundsException e) {
    throw new ParserException("Error parsing AVC config", e);
  }
}
 

/**
 * @param flags Flags that control the extractor's behavior.
 * @param timestampAdjuster Adjusts sample timestamps. May be null if no adjustment is needed.
 * @param sideloadedTrack Sideloaded track information, in the case that the extractor will not
 *     receive a moov box in the input data. Null if a moov box is expected.
 * @param sideloadedDrmInitData The {@link DrmInitData} to use for encrypted tracks. If null, the
 *     pssh boxes (if present) will be used.
 * @param closedCaptionFormats For tracks that contain SEI messages, the formats of the closed
 *     caption channels to expose.
 * @param additionalEmsgTrackOutput An extra track output that will receive all emsg messages
 *     targeting the player, even if {@link #FLAG_ENABLE_EMSG_TRACK} is not set. Null if special
 *     handling of emsg messages for players is not required.
 */
public FragmentedMp4Extractor(
    @Flags int flags,
    @Nullable TimestampAdjuster timestampAdjuster,
    @Nullable Track sideloadedTrack,
    @Nullable DrmInitData sideloadedDrmInitData,
    List<Format> closedCaptionFormats,
    @Nullable TrackOutput additionalEmsgTrackOutput) {
  this.flags = flags | (sideloadedTrack != null ? FLAG_SIDELOADED : 0);
  this.timestampAdjuster = timestampAdjuster;
  this.sideloadedTrack = sideloadedTrack;
  this.sideloadedDrmInitData = sideloadedDrmInitData;
  this.closedCaptionFormats = Collections.unmodifiableList(closedCaptionFormats);
  this.additionalEmsgTrackOutput = additionalEmsgTrackOutput;
  atomHeader = new ParsableByteArray(Atom.LONG_HEADER_SIZE);
  nalStartCode = new ParsableByteArray(NalUnitUtil.NAL_START_CODE);
  nalPrefix = new ParsableByteArray(5);
  nalBuffer = new ParsableByteArray();
  extendedTypeScratch = new byte[16];
  containerAtoms = new ArrayDeque<>();
  pendingMetadataSampleInfos = new ArrayDeque<>();
  trackBundles = new SparseArray<>();
  durationUs = C.TIME_UNSET;
  pendingSeekTimeUs = C.TIME_UNSET;
  segmentIndexEarliestPresentationTimeUs = C.TIME_UNSET;
  enterReadingAtomHeaderState();
}
 

/**
 * Creates a new extractor for unfragmented MP4 streams, using the specified flags to control the
 * extractor's behavior.
 *
 * @param flags Flags that control the extractor's behavior.
 */
public Mp4Extractor(@Flags int flags) {
  this.flags = flags;
  atomHeader = new ParsableByteArray(Atom.LONG_HEADER_SIZE);
  containerAtoms = new ArrayDeque<>();
  nalStartCode = new ParsableByteArray(NalUnitUtil.NAL_START_CODE);
  nalLength = new ParsableByteArray(4);
  sampleTrackIndex = C.INDEX_UNSET;
}
 

@Override
public void seek() {
  NalUnitUtil.clearPrefixFlags(prefixFlags);
  vps.reset();
  sps.reset();
  pps.reset();
  prefixSei.reset();
  suffixSei.reset();
  sampleReader.reset();
  totalBytesWritten = 0;
}
 

/**
 * Parses AVC configuration data.
 *
 * @param data A {@link ParsableByteArray}, whose position is set to the start of the AVC
 *     configuration data to parse.
 * @return A parsed representation of the HEVC configuration data.
 * @throws ParserException If an error occurred parsing the data.
 */
public static AvcConfig parse(ParsableByteArray data) throws ParserException {
  try {
    data.skipBytes(4); // Skip to the AVCDecoderConfigurationRecord (defined in 14496-15)
    int nalUnitLengthFieldLength = (data.readUnsignedByte() & 0x3) + 1;
    if (nalUnitLengthFieldLength == 3) {
      throw new IllegalStateException();
    }
    List<byte[]> initializationData = new ArrayList<>();
    int numSequenceParameterSets = data.readUnsignedByte() & 0x1F;
    for (int j = 0; j < numSequenceParameterSets; j++) {
      initializationData.add(buildNalUnitForChild(data));
    }
    int numPictureParameterSets = data.readUnsignedByte();
    for (int j = 0; j < numPictureParameterSets; j++) {
      initializationData.add(buildNalUnitForChild(data));
    }

    int width = Format.NO_VALUE;
    int height = Format.NO_VALUE;
    float pixelWidthAspectRatio = 1;
    if (numSequenceParameterSets > 0) {
      byte[] sps = initializationData.get(0);
      SpsData spsData = NalUnitUtil.parseSpsNalUnit(initializationData.get(0),
          nalUnitLengthFieldLength, sps.length);
      width = spsData.width;
      height = spsData.height;
      pixelWidthAspectRatio = spsData.pixelWidthAspectRatio;
    }
    return new AvcConfig(initializationData, nalUnitLengthFieldLength, width, height,
        pixelWidthAspectRatio);
  } catch (ArrayIndexOutOfBoundsException e) {
    throw new ParserException("Error parsing AVC config", e);
  }
}
 

@Override
public void seek() {
  NalUnitUtil.clearPrefixFlags(prefixFlags);
  vps.reset();
  sps.reset();
  pps.reset();
  prefixSei.reset();
  suffixSei.reset();
  sampleReader.reset();
  totalBytesWritten = 0;
}
 

/**
 * Parses AVC configuration data.
 *
 * @param data A {@link ParsableByteArray}, whose position is set to the start of the AVC
 *     configuration data to parse.
 * @return A parsed representation of the HEVC configuration data.
 * @throws ParserException If an error occurred parsing the data.
 */
public static AvcConfig parse(ParsableByteArray data) throws ParserException {
  try {
    data.skipBytes(4); // Skip to the AVCDecoderConfigurationRecord (defined in 14496-15)
    int nalUnitLengthFieldLength = (data.readUnsignedByte() & 0x3) + 1;
    if (nalUnitLengthFieldLength == 3) {
      throw new IllegalStateException();
    }
    List<byte[]> initializationData = new ArrayList<>();
    int numSequenceParameterSets = data.readUnsignedByte() & 0x1F;
    for (int j = 0; j < numSequenceParameterSets; j++) {
      initializationData.add(buildNalUnitForChild(data));
    }
    int numPictureParameterSets = data.readUnsignedByte();
    for (int j = 0; j < numPictureParameterSets; j++) {
      initializationData.add(buildNalUnitForChild(data));
    }

    int width = Format.NO_VALUE;
    int height = Format.NO_VALUE;
    float pixelWidthAspectRatio = 1;
    if (numSequenceParameterSets > 0) {
      byte[] sps = initializationData.get(0);
      SpsData spsData = NalUnitUtil.parseSpsNalUnit(initializationData.get(0),
          nalUnitLengthFieldLength, sps.length);
      width = spsData.width;
      height = spsData.height;
      pixelWidthAspectRatio = spsData.pixelWidthAspectRatio;
    }
    return new AvcConfig(initializationData, nalUnitLengthFieldLength, width, height,
        pixelWidthAspectRatio);
  } catch (ArrayIndexOutOfBoundsException e) {
    throw new ParserException("Error parsing AVC config", e);
  }
}
 

@Override
public void seek() {
  NalUnitUtil.clearPrefixFlags(prefixFlags);
  csdBuffer.reset();
  pesPtsUsAvailable = false;
  foundFirstFrameInGroup = false;
  totalBytesWritten = 0;
}
 

@Override
public void seek() {
  NalUnitUtil.clearPrefixFlags(prefixFlags);
  sps.reset();
  pps.reset();
  sei.reset();
  sampleReader.reset();
  totalBytesWritten = 0;
  randomAccessIndicator = false;
}
 

@Override
public void seek() {
  NalUnitUtil.clearPrefixFlags(prefixFlags);
  vps.reset();
  sps.reset();
  pps.reset();
  prefixSei.reset();
  suffixSei.reset();
  sampleReader.reset();
  totalBytesWritten = 0;
}
 

/**
 * Creates a new extractor for unfragmented MP4 streams, using the specified flags to control the
 * extractor's behavior.
 *
 * @param flags Flags that control the extractor's behavior.
 */
public Mp4Extractor(@Flags int flags) {
  this.flags = flags;
  atomHeader = new ParsableByteArray(Atom.LONG_HEADER_SIZE);
  containerAtoms = new ArrayDeque<>();
  nalStartCode = new ParsableByteArray(NalUnitUtil.NAL_START_CODE);
  nalLength = new ParsableByteArray(4);
  scratch = new ParsableByteArray();
  sampleTrackIndex = C.INDEX_UNSET;
}
 

/**
 * @param flags Flags that control the extractor's behavior.
 * @param timestampAdjuster Adjusts sample timestamps. May be null if no adjustment is needed.
 * @param sideloadedTrack Sideloaded track information, in the case that the extractor will not
 *     receive a moov box in the input data. Null if a moov box is expected.
 * @param sideloadedDrmInitData The {@link DrmInitData} to use for encrypted tracks. If null, the
 *     pssh boxes (if present) will be used.
 * @param closedCaptionFormats For tracks that contain SEI messages, the formats of the closed
 *     caption channels to expose.
 * @param additionalEmsgTrackOutput An extra track output that will receive all emsg messages
 *     targeting the player, even if {@link #FLAG_ENABLE_EMSG_TRACK} is not set. Null if special
 *     handling of emsg messages for players is not required.
 */
public FragmentedMp4Extractor(
    @Flags int flags,
    @Nullable TimestampAdjuster timestampAdjuster,
    @Nullable Track sideloadedTrack,
    @Nullable DrmInitData sideloadedDrmInitData,
    List<Format> closedCaptionFormats,
    @Nullable TrackOutput additionalEmsgTrackOutput) {
  this.flags = flags | (sideloadedTrack != null ? FLAG_SIDELOADED : 0);
  this.timestampAdjuster = timestampAdjuster;
  this.sideloadedTrack = sideloadedTrack;
  this.sideloadedDrmInitData = sideloadedDrmInitData;
  this.closedCaptionFormats = Collections.unmodifiableList(closedCaptionFormats);
  this.additionalEmsgTrackOutput = additionalEmsgTrackOutput;
  eventMessageEncoder = new EventMessageEncoder();
  atomHeader = new ParsableByteArray(Atom.LONG_HEADER_SIZE);
  nalStartCode = new ParsableByteArray(NalUnitUtil.NAL_START_CODE);
  nalPrefix = new ParsableByteArray(5);
  nalBuffer = new ParsableByteArray();
  scratchBytes = new byte[16];
  scratch = new ParsableByteArray(scratchBytes);
  containerAtoms = new ArrayDeque<>();
  pendingMetadataSampleInfos = new ArrayDeque<>();
  trackBundles = new SparseArray<>();
  durationUs = C.TIME_UNSET;
  pendingSeekTimeUs = C.TIME_UNSET;
  segmentIndexEarliestPresentationTimeUs = C.TIME_UNSET;
  enterReadingAtomHeaderState();
}
 

/**
 * Parses AVC configuration data.
 *
 * @param data A {@link ParsableByteArray}, whose position is set to the start of the AVC
 *     configuration data to parse.
 * @return A parsed representation of the HEVC configuration data.
 * @throws ParserException If an error occurred parsing the data.
 */
public static AvcConfig parse(ParsableByteArray data) throws ParserException {
  try {
    data.skipBytes(4); // Skip to the AVCDecoderConfigurationRecord (defined in 14496-15)
    int nalUnitLengthFieldLength = (data.readUnsignedByte() & 0x3) + 1;
    if (nalUnitLengthFieldLength == 3) {
      throw new IllegalStateException();
    }
    List<byte[]> initializationData = new ArrayList<>();
    int numSequenceParameterSets = data.readUnsignedByte() & 0x1F;
    for (int j = 0; j < numSequenceParameterSets; j++) {
      initializationData.add(buildNalUnitForChild(data));
    }
    int numPictureParameterSets = data.readUnsignedByte();
    for (int j = 0; j < numPictureParameterSets; j++) {
      initializationData.add(buildNalUnitForChild(data));
    }

    int width = Format.NO_VALUE;
    int height = Format.NO_VALUE;
    float pixelWidthAspectRatio = 1;
    if (numSequenceParameterSets > 0) {
      byte[] sps = initializationData.get(0);
      SpsData spsData = NalUnitUtil.parseSpsNalUnit(initializationData.get(0),
          nalUnitLengthFieldLength, sps.length);
      width = spsData.width;
      height = spsData.height;
      pixelWidthAspectRatio = spsData.pixelWidthAspectRatio;
    }
    return new AvcConfig(initializationData, nalUnitLengthFieldLength, width, height,
        pixelWidthAspectRatio);
  } catch (ArrayIndexOutOfBoundsException e) {
    throw new ParserException("Error parsing AVC config", e);
  }
}
 

@Override
public void seek() {
  NalUnitUtil.clearPrefixFlags(prefixFlags);
  csdBuffer.reset();
  if (userDataReader != null) {
    userData.reset();
  }
  totalBytesWritten = 0;
  startedFirstSample = false;
}
 

@Override
public void seek() {
  NalUnitUtil.clearPrefixFlags(prefixFlags);
  sps.reset();
  pps.reset();
  sei.reset();
  sampleReader.reset();
  totalBytesWritten = 0;
  randomAccessIndicator = false;
}
 

@Override
public void seek() {
  NalUnitUtil.clearPrefixFlags(prefixFlags);
  vps.reset();
  sps.reset();
  pps.reset();
  prefixSei.reset();
  suffixSei.reset();
  sampleReader.reset();
  totalBytesWritten = 0;
}
 

/**
 * Creates a new extractor for unfragmented MP4 streams, using the specified flags to control the
 * extractor's behavior.
 *
 * @param flags Flags that control the extractor's behavior.
 */
public Mp4Extractor(@Flags int flags) {
  this.flags = flags;
  atomHeader = new ParsableByteArray(Atom.LONG_HEADER_SIZE);
  containerAtoms = new ArrayDeque<>();
  nalStartCode = new ParsableByteArray(NalUnitUtil.NAL_START_CODE);
  nalLength = new ParsableByteArray(4);
  scratch = new ParsableByteArray();
  sampleTrackIndex = C.INDEX_UNSET;
}
 

/**
 * @param flags Flags that control the extractor's behavior.
 * @param timestampAdjuster Adjusts sample timestamps. May be null if no adjustment is needed.
 * @param sideloadedTrack Sideloaded track information, in the case that the extractor will not
 *     receive a moov box in the input data. Null if a moov box is expected.
 * @param sideloadedDrmInitData The {@link DrmInitData} to use for encrypted tracks. If null, the
 *     pssh boxes (if present) will be used.
 * @param closedCaptionFormats For tracks that contain SEI messages, the formats of the closed
 *     caption channels to expose.
 * @param additionalEmsgTrackOutput An extra track output that will receive all emsg messages
 *     targeting the player, even if {@link #FLAG_ENABLE_EMSG_TRACK} is not set. Null if special
 *     handling of emsg messages for players is not required.
 */
public FragmentedMp4Extractor(
    @Flags int flags,
    @Nullable TimestampAdjuster timestampAdjuster,
    @Nullable Track sideloadedTrack,
    @Nullable DrmInitData sideloadedDrmInitData,
    List<Format> closedCaptionFormats,
    @Nullable TrackOutput additionalEmsgTrackOutput) {
  this.flags = flags | (sideloadedTrack != null ? FLAG_SIDELOADED : 0);
  this.timestampAdjuster = timestampAdjuster;
  this.sideloadedTrack = sideloadedTrack;
  this.sideloadedDrmInitData = sideloadedDrmInitData;
  this.closedCaptionFormats = Collections.unmodifiableList(closedCaptionFormats);
  this.additionalEmsgTrackOutput = additionalEmsgTrackOutput;
  eventMessageEncoder = new EventMessageEncoder();
  atomHeader = new ParsableByteArray(Atom.LONG_HEADER_SIZE);
  nalStartCode = new ParsableByteArray(NalUnitUtil.NAL_START_CODE);
  nalPrefix = new ParsableByteArray(5);
  nalBuffer = new ParsableByteArray();
  scratchBytes = new byte[16];
  scratch = new ParsableByteArray(scratchBytes);
  containerAtoms = new ArrayDeque<>();
  pendingMetadataSampleInfos = new ArrayDeque<>();
  trackBundles = new SparseArray<>();
  durationUs = C.TIME_UNSET;
  pendingSeekTimeUs = C.TIME_UNSET;
  segmentIndexEarliestPresentationTimeUs = C.TIME_UNSET;
  enterReadingAtomHeaderState();
}
 

/**
 * Parses AVC configuration data.
 *
 * @param data A {@link ParsableByteArray}, whose position is set to the start of the AVC
 *     configuration data to parse.
 * @return A parsed representation of the HEVC configuration data.
 * @throws ParserException If an error occurred parsing the data.
 */
public static AvcConfig parse(ParsableByteArray data) throws ParserException {
  try {
    data.skipBytes(4); // Skip to the AVCDecoderConfigurationRecord (defined in 14496-15)
    int nalUnitLengthFieldLength = (data.readUnsignedByte() & 0x3) + 1;
    if (nalUnitLengthFieldLength == 3) {
      throw new IllegalStateException();
    }
    List<byte[]> initializationData = new ArrayList<>();
    int numSequenceParameterSets = data.readUnsignedByte() & 0x1F;
    for (int j = 0; j < numSequenceParameterSets; j++) {
      initializationData.add(buildNalUnitForChild(data));
    }
    int numPictureParameterSets = data.readUnsignedByte();
    for (int j = 0; j < numPictureParameterSets; j++) {
      initializationData.add(buildNalUnitForChild(data));
    }

    int width = Format.NO_VALUE;
    int height = Format.NO_VALUE;
    float pixelWidthAspectRatio = 1;
    if (numSequenceParameterSets > 0) {
      byte[] sps = initializationData.get(0);
      SpsData spsData = NalUnitUtil.parseSpsNalUnit(initializationData.get(0),
          nalUnitLengthFieldLength, sps.length);
      width = spsData.width;
      height = spsData.height;
      pixelWidthAspectRatio = spsData.pixelWidthAspectRatio;
    }
    return new AvcConfig(initializationData, nalUnitLengthFieldLength, width, height,
        pixelWidthAspectRatio);
  } catch (ArrayIndexOutOfBoundsException e) {
    throw new ParserException("Error parsing AVC config", e);
  }
}