Java 类com.google.android.exoplayer.extractor.SeekMap 实例源码

项目：ExoPlayer-Demo 文件：FlacSeekTable.java

/**
 * Creates a {@link SeekMap} wrapper for this FlacSeekTable.
 *
 * @param firstFrameOffset Offset of the first FLAC frame
 * @param sampleRate Sample rate of the FLAC file.
 * @return A SeekMap wrapper for this FlacSeekTable.
 */
public SeekMap createSeekMap(final long firstFrameOffset, final long sampleRate) {
  return new SeekMap() {
    @Override
    public boolean isSeekable() {
      return true;
    }

    @Override
    public long getPosition(long timeUs) {
      long sample = (timeUs * sampleRate) / 1000000L;

      int index = Util.binarySearchFloor(sampleNumbers, sample, true, true);
      return firstFrameOffset + offsets[index];
    }
  };
}

项目：ExoPlayer-Demo 文件：Mp4ExtractorTest.java

private static void assertSeekMap(SeekMap seekMap, boolean haveStss) {
  assertNotNull(seekMap);
  int expectedSeekPosition = getSampleOffset(0);
  for (int i = 0; i < SAMPLE_TIMESTAMPS.length; i++) {
    // Seek to just before the current sample.
    long seekPositionUs = getVideoTimestampUs(SAMPLE_TIMESTAMPS[i]) - 1;
    assertEquals(expectedSeekPosition, seekMap.getPosition(seekPositionUs));
    // If the current sample is a sync sample, the expected seek position will change.
    if (SAMPLE_IS_SYNC[i] || !haveStss) {
      expectedSeekPosition = getSampleOffset(i);
    }
    // Seek to the current sample.
    seekPositionUs = getVideoTimestampUs(SAMPLE_TIMESTAMPS[i]);
    assertEquals(expectedSeekPosition, seekMap.getPosition(seekPositionUs));
    // Seek to just after the current sample.
    seekPositionUs = getVideoTimestampUs(SAMPLE_TIMESTAMPS[i]) + 1;
    assertEquals(expectedSeekPosition, seekMap.getPosition(seekPositionUs));
  }
}

项目：ExoPlayer 文件：Mp4ExtractorTest.java

private static void assertSeekMap(SeekMap seekMap, boolean haveStss) {
  assertNotNull(seekMap);
  int expectedSeekPosition = getSampleOffset(0);
  for (int i = 0; i < SAMPLE_TIMESTAMPS.length; i++) {
    // Seek to just before the current sample.
    long seekPositionUs = getVideoTimestampUs(SAMPLE_TIMESTAMPS[i]) - 1;
    assertEquals(expectedSeekPosition, seekMap.getPosition(seekPositionUs));
    // If the current sample is a sync sample, the expected seek position will change.
    if (SAMPLE_IS_SYNC[i] || !haveStss) {
      expectedSeekPosition = getSampleOffset(i);
    }
    // Seek to the current sample.
    seekPositionUs = getVideoTimestampUs(SAMPLE_TIMESTAMPS[i]);
    assertEquals(expectedSeekPosition, seekMap.getPosition(seekPositionUs));
    // Seek to just after the current sample.
    seekPositionUs = getVideoTimestampUs(SAMPLE_TIMESTAMPS[i]) + 1;
    assertEquals(expectedSeekPosition, seekMap.getPosition(seekPositionUs));
  }
}

项目：miku 文件：WebmExtractor.java

/**
 * Builds a {@link SeekMap} from the recently gathered Cues information.
 *
 * @return The built {@link SeekMap}. May be {@link SeekMap#UNSEEKABLE} if cues information was
 *     missing or incomplete.
 */
private SeekMap buildSeekMap() {
  if (segmentContentPosition == UNKNOWN || durationUs == C.UNKNOWN_TIME_US
      || cueTimesUs == null || cueTimesUs.size() == 0
      || cueClusterPositions == null || cueClusterPositions.size() != cueTimesUs.size()) {
    // Cues information is missing or incomplete.
    cueTimesUs = null;
    cueClusterPositions = null;
    return SeekMap.UNSEEKABLE;
  }
  int cuePointsSize = cueTimesUs.size();
  int[] sizes = new int[cuePointsSize];
  long[] offsets = new long[cuePointsSize];
  long[] durationsUs = new long[cuePointsSize];
  long[] timesUs = new long[cuePointsSize];
  for (int i = 0; i < cuePointsSize; i++) {
    timesUs[i] = cueTimesUs.get(i);
    offsets[i] = segmentContentPosition + cueClusterPositions.get(i);
  }
  for (int i = 0; i < cuePointsSize - 1; i++) {
    sizes[i] = (int) (offsets[i + 1] - offsets[i]);
    durationsUs[i] = timesUs[i + 1] - timesUs[i];
  }
  sizes[cuePointsSize - 1] =
      (int) (segmentContentPosition + segmentContentSize - offsets[cuePointsSize - 1]);
  durationsUs[cuePointsSize - 1] = durationUs - timesUs[cuePointsSize - 1];
  cueTimesUs = null;
  cueClusterPositions = null;
  return new ChunkIndex(sizes, offsets, durationsUs, timesUs);
}

项目：ExoPlayer-Demo 文件：WebmExtractor.java

/**
 * Builds a {@link SeekMap} from the recently gathered Cues information.
 *
 * @return The built {@link SeekMap}. May be {@link SeekMap#UNSEEKABLE} if cues information was
 *     missing or incomplete.
 */
private SeekMap buildSeekMap() {
  if (segmentContentPosition == UNKNOWN || durationUs == C.UNKNOWN_TIME_US
      || cueTimesUs == null || cueTimesUs.size() == 0
      || cueClusterPositions == null || cueClusterPositions.size() != cueTimesUs.size()) {
    // Cues information is missing or incomplete.
    cueTimesUs = null;
    cueClusterPositions = null;
    return SeekMap.UNSEEKABLE;
  }
  int cuePointsSize = cueTimesUs.size();
  int[] sizes = new int[cuePointsSize];
  long[] offsets = new long[cuePointsSize];
  long[] durationsUs = new long[cuePointsSize];
  long[] timesUs = new long[cuePointsSize];
  for (int i = 0; i < cuePointsSize; i++) {
    timesUs[i] = cueTimesUs.get(i);
    offsets[i] = segmentContentPosition + cueClusterPositions.get(i);
  }
  for (int i = 0; i < cuePointsSize - 1; i++) {
    sizes[i] = (int) (offsets[i + 1] - offsets[i]);
    durationsUs[i] = timesUs[i + 1] - timesUs[i];
  }
  sizes[cuePointsSize - 1] =
      (int) (segmentContentPosition + segmentContentSize - offsets[cuePointsSize - 1]);
  durationsUs[cuePointsSize - 1] = durationUs - timesUs[cuePointsSize - 1];
  cueTimesUs = null;
  cueClusterPositions = null;
  return new ChunkIndex(sizes, offsets, durationsUs, timesUs);
}

项目：ExoPlayer 文件：WebmExtractor.java

/**
 * Builds a {@link SeekMap} from the recently gathered Cues information.
 *
 * @return The built {@link SeekMap}. May be {@link SeekMap#UNSEEKABLE} if cues information was
 *     missing or incomplete.
 */
private SeekMap buildSeekMap() {
  if (segmentContentPosition == UNKNOWN || durationUs == C.UNKNOWN_TIME_US
      || cueTimesUs == null || cueTimesUs.size() == 0
      || cueClusterPositions == null || cueClusterPositions.size() != cueTimesUs.size()) {
    // Cues information is missing or incomplete.
    cueTimesUs = null;
    cueClusterPositions = null;
    return SeekMap.UNSEEKABLE;
  }
  int cuePointsSize = cueTimesUs.size();
  int[] sizes = new int[cuePointsSize];
  long[] offsets = new long[cuePointsSize];
  long[] durationsUs = new long[cuePointsSize];
  long[] timesUs = new long[cuePointsSize];
  for (int i = 0; i < cuePointsSize; i++) {
    timesUs[i] = cueTimesUs.get(i);
    offsets[i] = segmentContentPosition + cueClusterPositions.get(i);
  }
  for (int i = 0; i < cuePointsSize - 1; i++) {
    sizes[i] = (int) (offsets[i + 1] - offsets[i]);
    durationsUs[i] = timesUs[i + 1] - timesUs[i];
  }
  sizes[cuePointsSize - 1] =
      (int) (segmentContentPosition + segmentContentSize - offsets[cuePointsSize - 1]);
  durationsUs[cuePointsSize - 1] = durationUs - timesUs[cuePointsSize - 1];
  cueTimesUs = null;
  cueClusterPositions = null;
  return new ChunkIndex(sizes, offsets, durationsUs, timesUs);
}

项目：miku 文件：AdtsExtractor.java

@Override
public void init(ExtractorOutput output) {
  adtsReader = new AdtsReader(output.track(0));
  output.endTracks();
  output.seekMap(SeekMap.UNSEEKABLE);
}

项目：miku 文件：TsExtractor.java

@Override
public void init(ExtractorOutput output) {
  this.output = output;
  output.seekMap(SeekMap.UNSEEKABLE);
}

项目：miku 文件：FragmentedMp4Extractor.java

private boolean readAtomHeader(ExtractorInput input) throws IOException, InterruptedException {
  if (atomHeaderBytesRead == 0) {
    // Read the standard length atom header.
    if (!input.readFully(atomHeader.data, 0, Atom.HEADER_SIZE, true)) {
      return false;
    }
    atomHeaderBytesRead = Atom.HEADER_SIZE;
    atomHeader.setPosition(0);
    atomSize = atomHeader.readUnsignedInt();
    atomType = atomHeader.readInt();
  }

  if (atomSize == Atom.LONG_SIZE_PREFIX) {
    // Read the extended atom size.
    int headerBytesRemaining = Atom.LONG_HEADER_SIZE - Atom.HEADER_SIZE;
    input.readFully(atomHeader.data, Atom.HEADER_SIZE, headerBytesRemaining);
    atomHeaderBytesRead += headerBytesRemaining;
    atomSize = atomHeader.readUnsignedLongToLong();
  }

  if (atomType == Atom.TYPE_mdat) {
    if (!haveOutputSeekMap) {
      extractorOutput.seekMap(SeekMap.UNSEEKABLE);
      haveOutputSeekMap = true;
    }
    if (fragmentRun.sampleEncryptionDataNeedsFill) {
      parserState = STATE_READING_ENCRYPTION_DATA;
    } else {
      parserState = STATE_READING_SAMPLE_START;
    }
    return true;
  }

  if (shouldParseAtom(atomType)) {
    if (shouldParseContainerAtom(atomType)) {
      long endPosition = input.getPosition() + atomSize - Atom.HEADER_SIZE;
      containerAtoms.add(new ContainerAtom(atomType, endPosition));
      enterReadingAtomHeaderState();
    } else {
      // We don't support parsing of leaf atoms that define extended atom sizes, or that have
      // lengths greater than Integer.MAX_VALUE.
      Assertions.checkState(atomHeaderBytesRead == Atom.HEADER_SIZE);
      Assertions.checkState(atomSize <= Integer.MAX_VALUE);
      atomData = new ParsableByteArray((int) atomSize);
      System.arraycopy(atomHeader.data, 0, atomData.data, 0, Atom.HEADER_SIZE);
      parserState = STATE_READING_ATOM_PAYLOAD;
    }
  } else {
    // We don't support skipping of atoms that have lengths greater than Integer.MAX_VALUE.
    Assertions.checkState(atomSize <= Integer.MAX_VALUE);
    atomData = null;
    parserState = STATE_READING_ATOM_PAYLOAD;
  }

  return true;
}

项目：miku 文件：WebmExtractor.java

void startMasterElement(int id, long contentPosition, long contentSize)
    throws ParserException {
  switch (id) {
    case ID_SEGMENT:
      if (segmentContentPosition != UNKNOWN && segmentContentPosition != contentPosition) {
        throw new ParserException("Multiple Segment elements not supported");
      }
      segmentContentPosition = contentPosition;
      segmentContentSize = contentSize;
      return;
    case ID_SEEK:
      seekEntryId = UNKNOWN;
      seekEntryPosition = UNKNOWN;
      return;
    case ID_CUES:
      cueTimesUs = new LongArray();
      cueClusterPositions = new LongArray();
      return;
    case ID_CUE_POINT:
      seenClusterPositionForCurrentCuePoint = false;
      return;
    case ID_CLUSTER:
      if (cuesState == CUES_STATE_NOT_BUILT) {
        // We need to build cues before parsing the cluster.
        if (cuesContentPosition != UNKNOWN) {
          // We know where the Cues element is located. Seek to request it.
          seekForCues = true;
        } else {
          // We don't know where the Cues element is located. It's most likely omitted. Allow
          // playback, but disable seeking.
          extractorOutput.seekMap(SeekMap.UNSEEKABLE);
          cuesState = CUES_STATE_BUILT;
        }
      }
      return;
    case ID_BLOCK_GROUP:
      sampleSeenReferenceBlock = false;
      return;
    case ID_CONTENT_ENCODING:
      // TODO: check and fail if more than one content encoding is present.
      return;
    case ID_CONTENT_ENCRYPTION:
      trackFormat.hasContentEncryption = true;
      return;
    case ID_TRACK_ENTRY:
      trackFormat = new TrackFormat();
      return;
    default:
      return;
  }
}

项目：ExoPlayer-Demo 文件：FlacExtractor.java

@Override
public int read(final ExtractorInput input, PositionHolder seekPosition)
    throws IOException, InterruptedException {
  decoder.setData(input);

  if (!metadataParsed) {
    FlacStreamInfo streamInfo = decoder.decodeMetadata();
    if (streamInfo == null) {
      throw new IOException("Metadata decoding failed");
    }
    metadataParsed = true;

    output.seekMap(new SeekMap() {
      final boolean isSeekable = decoder.getSeekPosition(0) != -1;

      @Override
      public boolean isSeekable() {
        return isSeekable;
      }

      @Override
      public long getPosition(long timeUs) {
        return isSeekable ? decoder.getSeekPosition(timeUs) : 0;
      }
    });

    MediaFormat mediaFormat = MediaFormat.createAudioFormat(null, MimeTypes.AUDIO_RAW,
            streamInfo.bitRate(), MediaFormat.NO_VALUE, streamInfo.durationUs(),
            streamInfo.channels, streamInfo.sampleRate, null, null, C.ENCODING_PCM_16BIT);
    trackOutput.format(mediaFormat);

    outputBuffer = new ParsableByteArray(streamInfo.maxDecodedFrameSize());
    outputByteBuffer = ByteBuffer.wrap(outputBuffer.data);
  }

  outputBuffer.reset();
  int size = decoder.decodeSample(outputByteBuffer);
  if (size <= 0) {
    return RESULT_END_OF_INPUT;
  }
  trackOutput.sampleData(outputBuffer, size);

  trackOutput.sampleMetadata(decoder.getLastSampleTimestamp(), C.SAMPLE_FLAG_SYNC, size, 0, null);

  return decoder.isEndOfData() ? RESULT_END_OF_INPUT : RESULT_CONTINUE;
}

项目：ExoPlayer-Demo 文件：WebvttExtractor.java

@Override
public void init(ExtractorOutput output) {
  this.output = output;
  output.seekMap(SeekMap.UNSEEKABLE);
}

项目：ExoPlayer-Demo 文件：AdtsExtractor.java

@Override
public void init(ExtractorOutput output) {
  adtsReader = new AdtsReader(output.track(0), output.track(1));
  output.endTracks();
  output.seekMap(SeekMap.UNSEEKABLE);
}

项目：ExoPlayer-Demo 文件：TsExtractor.java

@Override
public void init(ExtractorOutput output) {
  this.output = output;
  output.seekMap(SeekMap.UNSEEKABLE);
}

项目：ExoPlayer-Demo 文件：PsExtractor.java

@Override
public void init(ExtractorOutput output) {
  this.output = output;
  output.seekMap(SeekMap.UNSEEKABLE);
}

项目：ExoPlayer-Demo 文件：FlacReader.java

@Override
public int read(ExtractorInput input, PositionHolder seekPosition)
    throws IOException, InterruptedException {
  long position = input.getPosition();

  if (!oggParser.readPacket(input, scratch)) {
    return Extractor.RESULT_END_OF_INPUT;
  }

  byte[] data = scratch.data;
  if (streamInfo == null) {
    streamInfo = new FlacStreamInfo(data, 17);

    byte[] metadata = Arrays.copyOfRange(data, 9, scratch.limit());
    metadata[4] = (byte) 0x80; // Set the last metadata block flag, ignore the other blocks
    List<byte[]> initializationData = Collections.singletonList(metadata);

    MediaFormat mediaFormat = MediaFormat.createAudioFormat(null, MimeTypes.AUDIO_FLAC,
        streamInfo.bitRate(), MediaFormat.NO_VALUE, streamInfo.durationUs(),
        streamInfo.channels, streamInfo.sampleRate, initializationData, null);
    trackOutput.format(mediaFormat);

  } else if (data[0] == AUDIO_PACKET_TYPE) {
    if (!firstAudioPacketProcessed) {
      if (seekTable != null) {
        extractorOutput.seekMap(seekTable.createSeekMap(position, streamInfo.sampleRate));
        seekTable = null;
      } else {
        extractorOutput.seekMap(SeekMap.UNSEEKABLE);
      }
      firstAudioPacketProcessed = true;
    }

    trackOutput.sampleData(scratch, scratch.limit());
    scratch.setPosition(0);
    long timeUs = FlacUtil.extractSampleTimestamp(streamInfo, scratch);
    trackOutput.sampleMetadata(timeUs, C.SAMPLE_FLAG_SYNC, scratch.limit(), 0, null);

  } else if ((data[0] & 0x7F) == SEEKTABLE_PACKET_TYPE && seekTable == null) {
    seekTable = FlacSeekTable.parseSeekTable(scratch);
  }

  scratch.reset();
  return Extractor.RESULT_CONTINUE;
}

项目：ExoPlayer-Demo 文件：FragmentedMp4Extractor.java

private boolean readAtomHeader(ExtractorInput input) throws IOException, InterruptedException {
  if (atomHeaderBytesRead == 0) {
    // Read the standard length atom header.
    if (!input.readFully(atomHeader.data, 0, Atom.HEADER_SIZE, true)) {
      return false;
    }
    atomHeaderBytesRead = Atom.HEADER_SIZE;
    atomHeader.setPosition(0);
    atomSize = atomHeader.readUnsignedInt();
    atomType = atomHeader.readInt();
  }

  if (atomSize == Atom.LONG_SIZE_PREFIX) {
    // Read the extended atom size.
    int headerBytesRemaining = Atom.LONG_HEADER_SIZE - Atom.HEADER_SIZE;
    input.readFully(atomHeader.data, Atom.HEADER_SIZE, headerBytesRemaining);
    atomHeaderBytesRead += headerBytesRemaining;
    atomSize = atomHeader.readUnsignedLongToLong();
  }

  long atomPosition = input.getPosition() - atomHeaderBytesRead;
  if (atomType == Atom.TYPE_moof) {
    // The data positions may be updated when parsing the tfhd/trun.
    int trackCount = trackBundles.size();
    for (int i = 0; i < trackCount; i++) {
      TrackFragment fragment = trackBundles.valueAt(i).fragment;
      fragment.auxiliaryDataPosition = atomPosition;
      fragment.dataPosition = atomPosition;
    }
  }

  if (atomType == Atom.TYPE_mdat) {
    currentTrackBundle = null;
    endOfMdatPosition = atomPosition + atomSize;
    if (!haveOutputSeekMap) {
      extractorOutput.seekMap(SeekMap.UNSEEKABLE);
      haveOutputSeekMap = true;
    }
    parserState = STATE_READING_ENCRYPTION_DATA;
    return true;
  }

  if (shouldParseContainerAtom(atomType)) {
    long endPosition = input.getPosition() + atomSize - Atom.HEADER_SIZE;
    containerAtoms.add(new ContainerAtom(atomType, endPosition));
    if (atomSize == atomHeaderBytesRead) {
      processAtomEnded(endPosition);
    } else {
      // Start reading the first child atom.
      enterReadingAtomHeaderState();
    }
  } else if (shouldParseLeafAtom(atomType)) {
    if (atomHeaderBytesRead != Atom.HEADER_SIZE) {
      throw new ParserException("Leaf atom defines extended atom size (unsupported).");
    }
    if (atomSize > Integer.MAX_VALUE) {
      throw new ParserException("Leaf atom with length > 2147483647 (unsupported).");
    }
    atomData = new ParsableByteArray((int) atomSize);
    System.arraycopy(atomHeader.data, 0, atomData.data, 0, Atom.HEADER_SIZE);
    parserState = STATE_READING_ATOM_PAYLOAD;
  } else {
    if (atomSize > Integer.MAX_VALUE) {
      throw new ParserException("Skipping atom with length > 2147483647 (unsupported).");
    }
    atomData = null;
    parserState = STATE_READING_ATOM_PAYLOAD;
  }

  return true;
}

项目：ExoPlayer-Demo 文件：WebmExtractor.java

void startMasterElement(int id, long contentPosition, long contentSize)
    throws ParserException {
  switch (id) {
    case ID_SEGMENT:
      if (segmentContentPosition != UNKNOWN && segmentContentPosition != contentPosition) {
        throw new ParserException("Multiple Segment elements not supported");
      }
      segmentContentPosition = contentPosition;
      segmentContentSize = contentSize;
      return;
    case ID_SEEK:
      seekEntryId = UNKNOWN;
      seekEntryPosition = UNKNOWN;
      return;
    case ID_CUES:
      cueTimesUs = new LongArray();
      cueClusterPositions = new LongArray();
      return;
    case ID_CUE_POINT:
      seenClusterPositionForCurrentCuePoint = false;
      return;
    case ID_CLUSTER:
      if (!sentSeekMap) {
        // We need to build cues before parsing the cluster.
        if (cuesContentPosition != UNKNOWN) {
          // We know where the Cues element is located. Seek to request it.
          seekForCues = true;
        } else {
          // We don't know where the Cues element is located. It's most likely omitted. Allow
          // playback, but disable seeking.
          extractorOutput.seekMap(SeekMap.UNSEEKABLE);
          sentSeekMap = true;
        }
      }
      return;
    case ID_BLOCK_GROUP:
      sampleSeenReferenceBlock = false;
      return;
    case ID_CONTENT_ENCODING:
      // TODO: check and fail if more than one content encoding is present.
      return;
    case ID_CONTENT_ENCRYPTION:
      currentTrack.hasContentEncryption = true;
      return;
    case ID_TRACK_ENTRY:
      currentTrack = new Track();
      return;
    default:
      return;
  }
}

项目：ExoPlayer-Demo 文件：WebmExtractorTest.java

private void assertIndexUnseekable() {
  assertEquals(SeekMap.UNSEEKABLE, extractorOutput.seekMap);
}

项目：ExoPlayer 文件：AdtsExtractor.java

@Override
public void init(ExtractorOutput output) {
  adtsReader = new AdtsReader(output.track(0));
  output.endTracks();
  output.seekMap(SeekMap.UNSEEKABLE);
}

项目：ExoPlayer 文件：TsExtractor.java

@Override
public void init(ExtractorOutput output) {
  this.output = output;
  output.seekMap(SeekMap.UNSEEKABLE);
}

项目：ExoPlayer 文件：FragmentedMp4Extractor.java

private boolean readAtomHeader(ExtractorInput input) throws IOException, InterruptedException {
  if (atomHeaderBytesRead == 0) {
    // Read the standard length atom header.
    if (!input.readFully(atomHeader.data, 0, Atom.HEADER_SIZE, true)) {
      return false;
    }
    atomHeaderBytesRead = Atom.HEADER_SIZE;
    atomHeader.setPosition(0);
    atomSize = atomHeader.readUnsignedInt();
    atomType = atomHeader.readInt();
  }

  if (atomSize == Atom.LONG_SIZE_PREFIX) {
    // Read the extended atom size.
    int headerBytesRemaining = Atom.LONG_HEADER_SIZE - Atom.HEADER_SIZE;
    input.readFully(atomHeader.data, Atom.HEADER_SIZE, headerBytesRemaining);
    atomHeaderBytesRead += headerBytesRemaining;
    atomSize = atomHeader.readUnsignedLongToLong();
  }

  if (atomType == Atom.TYPE_mdat) {
    if (!haveOutputSeekMap) {
      extractorOutput.seekMap(SeekMap.UNSEEKABLE);
      haveOutputSeekMap = true;
    }
    if (fragmentRun.sampleEncryptionDataNeedsFill) {
      parserState = STATE_READING_ENCRYPTION_DATA;
    } else {
      parserState = STATE_READING_SAMPLE_START;
    }
    return true;
  }

  if (shouldParseAtom(atomType)) {
    if (shouldParseContainerAtom(atomType)) {
      long endPosition = input.getPosition() + atomSize - Atom.HEADER_SIZE;
      containerAtoms.add(new ContainerAtom(atomType, endPosition));
      enterReadingAtomHeaderState();
    } else {
      // We don't support parsing of leaf atoms that define extended atom sizes, or that have
      // lengths greater than Integer.MAX_VALUE.
      Assertions.checkState(atomHeaderBytesRead == Atom.HEADER_SIZE);
      Assertions.checkState(atomSize <= Integer.MAX_VALUE);
      atomData = new ParsableByteArray((int) atomSize);
      System.arraycopy(atomHeader.data, 0, atomData.data, 0, Atom.HEADER_SIZE);
      parserState = STATE_READING_ATOM_PAYLOAD;
    }
  } else {
    // We don't support skipping of atoms that have lengths greater than Integer.MAX_VALUE.
    Assertions.checkState(atomSize <= Integer.MAX_VALUE);
    atomData = null;
    parserState = STATE_READING_ATOM_PAYLOAD;
  }

  return true;
}

项目：ExoPlayer 文件：WebmExtractor.java

void startMasterElement(int id, long contentPosition, long contentSize)
    throws ParserException {
  switch (id) {
    case ID_SEGMENT:
      if (segmentContentPosition != UNKNOWN && segmentContentPosition != contentPosition) {
        throw new ParserException("Multiple Segment elements not supported");
      }
      segmentContentPosition = contentPosition;
      segmentContentSize = contentSize;
      return;
    case ID_SEEK:
      seekEntryId = UNKNOWN;
      seekEntryPosition = UNKNOWN;
      return;
    case ID_CUES:
      cueTimesUs = new LongArray();
      cueClusterPositions = new LongArray();
      return;
    case ID_CUE_POINT:
      seenClusterPositionForCurrentCuePoint = false;
      return;
    case ID_CLUSTER:
      if (cuesState == CUES_STATE_NOT_BUILT) {
        // We need to build cues before parsing the cluster.
        if (cuesContentPosition != UNKNOWN) {
          // We know where the Cues element is located. Seek to request it.
          seekForCues = true;
        } else {
          // We don't know where the Cues element is located. It's most likely omitted. Allow
          // playback, but disable seeking.
          extractorOutput.seekMap(SeekMap.UNSEEKABLE);
          cuesState = CUES_STATE_BUILT;
        }
      }
      return;
    case ID_BLOCK_GROUP:
      sampleSeenReferenceBlock = false;
      return;
    case ID_CONTENT_ENCODING:
      // TODO: check and fail if more than one content encoding is present.
      return;
    case ID_CONTENT_ENCRYPTION:
      trackFormat.hasContentEncryption = true;
      return;
    case ID_TRACK_ENTRY:
      trackFormat = new TrackFormat();
      return;
    default:
      return;
  }
}

项目：ExoPlayer 文件：WebmExtractorTest.java

private void assertIndexUnseekable() {
  assertEquals(SeekMap.UNSEEKABLE, extractorOutput.seekMap);
}

项目：miku 文件：InitializationChunk.java

/**
 * Returns a {@link SeekMap} parsed from the chunk, or null.
 * <p>
 * Should be called after loading has completed.
 */
public SeekMap getSeekMap() {
  return seekMap;
}

项目：ExoPlayer-Demo 文件：InitializationChunk.java

/**
 * Returns a {@link SeekMap} parsed from the chunk, or null.
 * <p>
 * Should be called after loading has completed.
 */
public SeekMap getSeekMap() {
  return seekMap;
}

项目：ExoPlayer 文件：InitializationChunk.java

/**
 * Returns a {@link SeekMap} parsed from the chunk, or null.
 * <p>
 * Should be called after loading has completed.
 */
public SeekMap getSeekMap() {
  return seekMap;
}