Java Code Examples for com.google.android.exoplayer2.util.Util#EMPTY_BYTE_ARRAY

/**
 * @param id See {@link #id}.
 * @param type See {@link #type}.
 * @param uri See {@link #uri}.
 * @param streamKeys See {@link #streamKeys}.
 * @param customCacheKey See {@link #customCacheKey}.
 * @param data See {@link #data}.
 */
public DownloadRequest(
    String id,
    String type,
    Uri uri,
    List<StreamKey> streamKeys,
    @Nullable String customCacheKey,
    @Nullable byte[] data) {
  if (TYPE_DASH.equals(type) || TYPE_HLS.equals(type) || TYPE_SS.equals(type)) {
    Assertions.checkArgument(
        customCacheKey == null, "customCacheKey must be null for type: " + type);
  }
  this.id = id;
  this.type = type;
  this.uri = uri;
  ArrayList<StreamKey> mutableKeys = new ArrayList<>(streamKeys);
  Collections.sort(mutableKeys);
  this.streamKeys = Collections.unmodifiableList(mutableKeys);
  this.customCacheKey = customCacheKey;
  this.data = data != null ? Arrays.copyOf(data, data.length) : Util.EMPTY_BYTE_ARRAY;
}
 

/**
 * @param id See {@link #id}.
 * @param type See {@link #type}.
 * @param uri See {@link #uri}.
 * @param streamKeys See {@link #streamKeys}.
 * @param customCacheKey See {@link #customCacheKey}.
 * @param data See {@link #data}.
 */
public DownloadRequest(
    String id,
    String type,
    Uri uri,
    List<StreamKey> streamKeys,
    @Nullable String customCacheKey,
    @Nullable byte[] data) {
  if (TYPE_DASH.equals(type) || TYPE_HLS.equals(type) || TYPE_SS.equals(type)) {
    Assertions.checkArgument(
        customCacheKey == null, "customCacheKey must be null for type: " + type);
  }
  this.id = id;
  this.type = type;
  this.uri = uri;
  ArrayList<StreamKey> mutableKeys = new ArrayList<>(streamKeys);
  Collections.sort(mutableKeys);
  this.streamKeys = Collections.unmodifiableList(mutableKeys);
  this.customCacheKey = customCacheKey;
  this.data = data != null ? Arrays.copyOf(data, data.length) : Util.EMPTY_BYTE_ARRAY;
}
 

@Override
protected void onReset() {
  enabled = false;
  paddingSize = 0;
  maybeSilenceBuffer = Util.EMPTY_BYTE_ARRAY;
  paddingBuffer = Util.EMPTY_BYTE_ARRAY;
}
 

/**
 * Deserializes a {@link DefaultContentMetadata} from the given input stream.
 *
 * @param input Input stream to read from.
 * @return a {@link DefaultContentMetadata} instance.
 * @throws IOException If an error occurs during reading from the input.
 */
private static DefaultContentMetadata readContentMetadata(DataInputStream input)
    throws IOException {
  int size = input.readInt();
  HashMap<String, byte[]> metadata = new HashMap<>();
  for (int i = 0; i < size; i++) {
    String name = input.readUTF();
    int valueSize = input.readInt();
    if (valueSize < 0) {
      throw new IOException("Invalid value size: " + valueSize);
    }
    // Grow the array incrementally to avoid OutOfMemoryError in the case that a corrupt (and very
    // large) valueSize was read. In such cases the implementation below is expected to throw
    // IOException from one of the readFully calls, due to the end of the input being reached.
    int bytesRead = 0;
    int nextBytesToRead = Math.min(valueSize, INCREMENTAL_METADATA_READ_LENGTH);
    byte[] value = Util.EMPTY_BYTE_ARRAY;
    while (bytesRead != valueSize) {
      value = Arrays.copyOf(value, bytesRead + nextBytesToRead);
      input.readFully(value, bytesRead, nextBytesToRead);
      bytesRead += nextBytesToRead;
      nextBytesToRead = Math.min(valueSize - bytesRead, INCREMENTAL_METADATA_READ_LENGTH);
    }
    metadata.put(name, value);
  }
  return new DefaultContentMetadata(metadata);
}
 

@Override
protected void onReset() {
  enabled = false;
  paddingSize = 0;
  maybeSilenceBuffer = Util.EMPTY_BYTE_ARRAY;
  paddingBuffer = Util.EMPTY_BYTE_ARRAY;
}
 

/**
 * Deserializes a {@link DefaultContentMetadata} from the given input stream.
 *
 * @param input Input stream to read from.
 * @return a {@link DefaultContentMetadata} instance.
 * @throws IOException If an error occurs during reading from the input.
 */
private static DefaultContentMetadata readContentMetadata(DataInputStream input)
    throws IOException {
  int size = input.readInt();
  HashMap<String, byte[]> metadata = new HashMap<>();
  for (int i = 0; i < size; i++) {
    String name = input.readUTF();
    int valueSize = input.readInt();
    if (valueSize < 0) {
      throw new IOException("Invalid value size: " + valueSize);
    }
    // Grow the array incrementally to avoid OutOfMemoryError in the case that a corrupt (and very
    // large) valueSize was read. In such cases the implementation below is expected to throw
    // IOException from one of the readFully calls, due to the end of the input being reached.
    int bytesRead = 0;
    int nextBytesToRead = Math.min(valueSize, INCREMENTAL_METADATA_READ_LENGTH);
    byte[] value = Util.EMPTY_BYTE_ARRAY;
    while (bytesRead != valueSize) {
      value = Arrays.copyOf(value, bytesRead + nextBytesToRead);
      input.readFully(value, bytesRead, nextBytesToRead);
      bytesRead += nextBytesToRead;
      nextBytesToRead = Math.min(valueSize - bytesRead, INCREMENTAL_METADATA_READ_LENGTH);
    }
    metadata.put(name, value);
  }
  return new DefaultContentMetadata(metadata);
}
 

/**
 * Deserializes a {@link DefaultContentMetadata} from the given input stream.
 *
 * @param input Input stream to read from.
 * @return a {@link DefaultContentMetadata} instance.
 * @throws IOException If an error occurs during reading from the input.
 */
private static DefaultContentMetadata readContentMetadata(DataInputStream input)
    throws IOException {
  int size = input.readInt();
  HashMap<String, byte[]> metadata = new HashMap<>();
  for (int i = 0; i < size; i++) {
    String name = input.readUTF();
    int valueSize = input.readInt();
    if (valueSize < 0) {
      throw new IOException("Invalid value size: " + valueSize);
    }
    // Grow the array incrementally to avoid OutOfMemoryError in the case that a corrupt (and very
    // large) valueSize was read. In such cases the implementation below is expected to throw
    // IOException from one of the readFully calls, due to the end of the input being reached.
    int bytesRead = 0;
    int nextBytesToRead = Math.min(valueSize, INCREMENTAL_METADATA_READ_LENGTH);
    byte[] value = Util.EMPTY_BYTE_ARRAY;
    while (bytesRead != valueSize) {
      value = Arrays.copyOf(value, bytesRead + nextBytesToRead);
      input.readFully(value, bytesRead, nextBytesToRead);
      bytesRead += nextBytesToRead;
      nextBytesToRead = Math.min(valueSize - bytesRead, INCREMENTAL_METADATA_READ_LENGTH);
    }
    metadata.put(name, value);
  }
  return new DefaultContentMetadata(metadata);
}
 

@Override
protected void onReset() {
  enabled = false;
  paddingSize = 0;
  maybeSilenceBuffer = Util.EMPTY_BYTE_ARRAY;
  paddingBuffer = Util.EMPTY_BYTE_ARRAY;
}
 

/**
 * @param extractorFactory An {@link HlsExtractorFactory} from which to obtain the extractors for
 *     media chunks.
 * @param playlistTracker The {@link HlsPlaylistTracker} from which to obtain media playlists.
 * @param playlistUrls The {@link Uri}s of the media playlists that can be adapted between by this
 *     chunk source.
 * @param playlistFormats The {@link Format Formats} corresponding to the media playlists.
 * @param dataSourceFactory An {@link HlsDataSourceFactory} to create {@link DataSource}s for the
 *     chunks.
 * @param mediaTransferListener The transfer listener which should be informed of any media data
 *     transfers. May be null if no listener is available.
 * @param timestampAdjusterProvider A provider of {@link TimestampAdjuster} instances. If multiple
 *     {@link HlsChunkSource}s are used for a single playback, they should all share the same
 *     provider.
 * @param muxedCaptionFormats List of muxed caption {@link Format}s. Null if no closed caption
 *     information is available in the master playlist.
 */
public HlsChunkSource(
    HlsExtractorFactory extractorFactory,
    HlsPlaylistTracker playlistTracker,
    Uri[] playlistUrls,
    Format[] playlistFormats,
    HlsDataSourceFactory dataSourceFactory,
    @Nullable TransferListener mediaTransferListener,
    TimestampAdjusterProvider timestampAdjusterProvider,
    @Nullable List<Format> muxedCaptionFormats) {
  this.extractorFactory = extractorFactory;
  this.playlistTracker = playlistTracker;
  this.playlistUrls = playlistUrls;
  this.playlistFormats = playlistFormats;
  this.timestampAdjusterProvider = timestampAdjusterProvider;
  this.muxedCaptionFormats = muxedCaptionFormats;
  keyCache = new FullSegmentEncryptionKeyCache(KEY_CACHE_SIZE);
  scratchSpace = Util.EMPTY_BYTE_ARRAY;
  liveEdgeInPeriodTimeUs = C.TIME_UNSET;
  mediaDataSource = dataSourceFactory.createDataSource(C.DATA_TYPE_MEDIA);
  if (mediaTransferListener != null) {
    mediaDataSource.addTransferListener(mediaTransferListener);
  }
  encryptionDataSource = dataSourceFactory.createDataSource(C.DATA_TYPE_DRM);
  trackGroup = new TrackGroup(playlistFormats);
  int[] initialTrackSelection = new int[playlistUrls.length];
  for (int i = 0; i < playlistUrls.length; i++) {
    initialTrackSelection[i] = i;
  }
  trackSelection = new InitializationTrackSelection(trackGroup, initialTrackSelection);
}
 

@Override
protected void onReset() {
  endBuffer = Util.EMPTY_BYTE_ARRAY;
}
 

/** Creates a new silence trimming audio processor. */
public SilenceSkippingAudioProcessor() {
  maybeSilenceBuffer = Util.EMPTY_BYTE_ARRAY;
  paddingBuffer = Util.EMPTY_BYTE_ARRAY;
}
 

/** Creates a new silence trimming audio processor. */
public SilenceSkippingAudioProcessor() {
  maybeSilenceBuffer = Util.EMPTY_BYTE_ARRAY;
  paddingBuffer = Util.EMPTY_BYTE_ARRAY;
}
 

@Override
protected void onReset() {
  endBuffer = Util.EMPTY_BYTE_ARRAY;
}
 

/** Creates a new audio processor for trimming samples from the start/end of data. */
public TrimmingAudioProcessor() {
  endBuffer = Util.EMPTY_BYTE_ARRAY;
}
 

/** Creates a new audio processor for trimming samples from the start/end of data. */
public TrimmingAudioProcessor() {
  endBuffer = Util.EMPTY_BYTE_ARRAY;
}
 

/** Creates a new silence trimming audio processor. */
public SilenceSkippingAudioProcessor() {
  maybeSilenceBuffer = Util.EMPTY_BYTE_ARRAY;
  paddingBuffer = Util.EMPTY_BYTE_ARRAY;
}
 

@Override
public byte[] getPropertyByteArray(String propertyName) {
  return Util.EMPTY_BYTE_ARRAY;
}
 

/**
 * Copies the specified range of an array, or returns a zero length array if the range is invalid.
 *
 * @param data The array from which to copy.
 * @param from The start of the range to copy (inclusive).
 * @param to The end of the range to copy (exclusive).
 * @return The copied data, or a zero length array if the range is invalid.
 */
private static byte[] copyOfRangeIfValid(byte[] data, int from, int to) {
  if (to <= from) {
    // Invalid or zero length range.
    return Util.EMPTY_BYTE_ARRAY;
  }
  return Arrays.copyOfRange(data, from, to);
}
 

/**
 * Copies the specified range of an array, or returns a zero length array if the range is invalid.
 *
 * @param data The array from which to copy.
 * @param from The start of the range to copy (inclusive).
 * @param to The end of the range to copy (exclusive).
 * @return The copied data, or a zero length array if the range is invalid.
 */
private static byte[] copyOfRangeIfValid(byte[] data, int from, int to) {
  if (to <= from) {
    // Invalid or zero length range.
    return Util.EMPTY_BYTE_ARRAY;
  }
  return Arrays.copyOfRange(data, from, to);
}
 

/**
 * Copies the specified range of an array, or returns a zero length array if the range is invalid.
 *
 * @param data The array from which to copy.
 * @param from The start of the range to copy (inclusive).
 * @param to The end of the range to copy (exclusive).
 * @return The copied data, or a zero length array if the range is invalid.
 */
private static byte[] copyOfRangeIfValid(byte[] data, int from, int to) {
  if (to <= from) {
    // Invalid or zero length range.
    return Util.EMPTY_BYTE_ARRAY;
  }
  return Arrays.copyOfRange(data, from, to);
}