Java TimestampAdjuster类代码示例

import com.google.android.exoplayer2.util.TimestampAdjuster; //导入依赖的package包/类
/**
 * @param mode Mode for the extractor. One of {@link #MODE_MULTI_PMT}, {@link #MODE_SINGLE_PMT}
 *     and {@link #MODE_HLS}.
 * @param timestampAdjuster A timestamp adjuster for offsetting and scaling sample timestamps.
 * @param payloadReaderFactory Factory for injecting a custom set of payload readers.
 */
public TsExtractor(@Mode int mode, TimestampAdjuster timestampAdjuster,
    TsPayloadReader.Factory payloadReaderFactory) {
  this.payloadReaderFactory = Assertions.checkNotNull(payloadReaderFactory);
  this.mode = mode;
  if (mode == MODE_SINGLE_PMT || mode == MODE_HLS) {
    timestampAdjusters = Collections.singletonList(timestampAdjuster);
  } else {
    timestampAdjusters = new ArrayList<>();
    timestampAdjusters.add(timestampAdjuster);
  }
  tsPacketBuffer = new ParsableByteArray(BUFFER_SIZE);
  tsScratch = new ParsableBitArray(new byte[3]);
  trackIds = new SparseBooleanArray();
  tsPayloadReaders = new SparseArray<>();
  continuityCounters = new SparseIntArray();
  resetPayloadReaders();
}
 

import com.google.android.exoplayer2.util.TimestampAdjuster; //导入依赖的package包/类
/**
 * @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();
}
 

import com.google.android.exoplayer2.util.TimestampAdjuster; //导入依赖的package包/类
/**
 * @param mode Mode for the extractor. One of {@link #MODE_NORMAL}, {@link #MODE_SINGLE_PMT}
 *     and {@link #MODE_HLS}.
 * @param timestampAdjuster A timestamp adjuster for offsetting and scaling sample timestamps.
 * @param payloadReaderFactory Factory for injecting a custom set of payload readers.
 */
public TsExtractor(@Mode int mode, TimestampAdjuster timestampAdjuster,
    TsPayloadReader.Factory payloadReaderFactory) {
  this.payloadReaderFactory = Assertions.checkNotNull(payloadReaderFactory);
  this.mode = mode;
  if (mode == MODE_SINGLE_PMT || mode == MODE_HLS) {
    timestampAdjusters = Collections.singletonList(timestampAdjuster);
  } else {
    timestampAdjusters = new ArrayList<>();
    timestampAdjusters.add(timestampAdjuster);
  }
  tsPacketBuffer = new ParsableByteArray(BUFFER_SIZE);
  tsScratch = new ParsableBitArray(new byte[3]);
  trackIds = new SparseBooleanArray();
  tsPayloadReaders = new SparseArray<>();
  continuityCounters = new SparseIntArray();
  resetPayloadReaders();
}
 

import com.google.android.exoplayer2.util.TimestampAdjuster; //导入依赖的package包/类
/**
 * @param mode Mode for the extractor. One of {@link #MODE_MULTI_PMT}, {@link #MODE_SINGLE_PMT}
 *     and {@link #MODE_HLS}.
 * @param timestampAdjuster A timestamp adjuster for offsetting and scaling sample timestamps.
 * @param payloadReaderFactory Factory for injecting a custom set of payload readers.
 */
public TsExtractor(@Mode int mode, TimestampAdjuster timestampAdjuster,
    TsPayloadReader.Factory payloadReaderFactory) {
  this.payloadReaderFactory = Assertions.checkNotNull(payloadReaderFactory);
  this.mode = mode;
  if (mode == MODE_SINGLE_PMT || mode == MODE_HLS) {
    timestampAdjusters = Collections.singletonList(timestampAdjuster);
  } else {
    timestampAdjusters = new ArrayList<>();
    timestampAdjusters.add(timestampAdjuster);
  }
  tsPacketBuffer = new ParsableByteArray(BUFFER_SIZE);
  trackIds = new SparseBooleanArray();
  tsPayloadReaders = new SparseArray<>();
  continuityCounters = new SparseIntArray();
  resetPayloadReaders();
}
 

import com.google.android.exoplayer2.util.TimestampAdjuster; //导入依赖的package包/类
/**
 * @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.
 */
public FragmentedMp4Extractor(@Flags int flags, TimestampAdjuster timestampAdjuster,
    Track sideloadedTrack, DrmInitData sideloadedDrmInitData, List<Format> closedCaptionFormats) {
  this.flags = flags | (sideloadedTrack != null ? FLAG_SIDELOADED : 0);
  this.timestampAdjuster = timestampAdjuster;
  this.sideloadedTrack = sideloadedTrack;
  this.sideloadedDrmInitData = sideloadedDrmInitData;
  this.closedCaptionFormats = Collections.unmodifiableList(closedCaptionFormats);
  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);
  defaultInitializationVector = new ParsableByteArray();
  extendedTypeScratch = new byte[16];
  containerAtoms = new Stack<>();
  pendingMetadataSampleInfos = new LinkedList<>();
  trackBundles = new SparseArray<>();
  durationUs = C.TIME_UNSET;
  segmentIndexEarliestPresentationTimeUs = C.TIME_UNSET;
  enterReadingAtomHeaderState();
}
 

import com.google.android.exoplayer2.util.TimestampAdjuster; //导入依赖的package包/类
public void testCustomPesReader() throws Exception {
  CustomTsPayloadReaderFactory factory = new CustomTsPayloadReaderFactory(true, false);
  TsExtractor tsExtractor = new TsExtractor(TsExtractor.MODE_MULTI_PMT, new TimestampAdjuster(0),
      factory);
  FakeExtractorInput input = new FakeExtractorInput.Builder()
      .setData(TestUtil.getByteArray(getInstrumentation(), "ts/sample.ts"))
      .setSimulateIOErrors(false)
      .setSimulateUnknownLength(false)
      .setSimulatePartialReads(false).build();
  FakeExtractorOutput output = new FakeExtractorOutput();
  tsExtractor.init(output);
  PositionHolder seekPositionHolder = new PositionHolder();
  int readResult = Extractor.RESULT_CONTINUE;
  while (readResult != Extractor.RESULT_END_OF_INPUT) {
    readResult = tsExtractor.read(input, seekPositionHolder);
  }
  CustomEsReader reader = factory.esReader;
  assertEquals(2, reader.packetsRead);
  TrackOutput trackOutput = reader.getTrackOutput();
  assertTrue(trackOutput == output.trackOutputs.get(257 /* PID of audio track. */));
  assertEquals(
      Format.createTextSampleFormat("1/257", "mime", null, 0, 0, "und", null, 0),
      ((FakeTrackOutput) trackOutput).format);
}
 

import com.google.android.exoplayer2.util.TimestampAdjuster; //导入依赖的package包/类
public void testCustomInitialSectionReader() throws Exception {
  CustomTsPayloadReaderFactory factory = new CustomTsPayloadReaderFactory(false, true);
  TsExtractor tsExtractor = new TsExtractor(TsExtractor.MODE_MULTI_PMT, new TimestampAdjuster(0),
      factory);
  FakeExtractorInput input = new FakeExtractorInput.Builder()
      .setData(TestUtil.getByteArray(getInstrumentation(), "ts/sample_with_sdt.ts"))
      .setSimulateIOErrors(false)
      .setSimulateUnknownLength(false)
      .setSimulatePartialReads(false).build();
  tsExtractor.init(new FakeExtractorOutput());
  PositionHolder seekPositionHolder = new PositionHolder();
  int readResult = Extractor.RESULT_CONTINUE;
  while (readResult != Extractor.RESULT_END_OF_INPUT) {
    readResult = tsExtractor.read(input, seekPositionHolder);
  }
  assertEquals(1, factory.sdtReader.consumedSdts);
}
 

import com.google.android.exoplayer2.util.TimestampAdjuster; //导入依赖的package包/类
/**
 * @param dataSource The source from which the data should be loaded.
 * @param dataSpec Defines the data to be loaded.
 * @param initDataSpec Defines the initialization data to be fed to new extractors. May be null.
 * @param hlsUrl The url of the playlist from which this chunk was obtained.
 * @param muxedCaptionFormats List of muxed caption {@link Format}s. Null if no closed caption
 *     information is available in the master playlist.
 * @param trackSelectionReason See {@link #trackSelectionReason}.
 * @param trackSelectionData See {@link #trackSelectionData}.
 * @param startTimeUs The start time of the chunk in microseconds.
 * @param endTimeUs The end time of the chunk in microseconds.
 * @param chunkIndex The media sequence number of the chunk.
 * @param discontinuitySequenceNumber The discontinuity sequence number of the chunk.
 * @param isMasterTimestampSource True if the chunk can initialize the timestamp adjuster.
 * @param timestampAdjuster Adjuster corresponding to the provided discontinuity sequence number.
 * @param previousChunk The {@link HlsMediaChunk} that preceded this one. May be null.
 * @param encryptionKey For AES encryption chunks, the encryption key.
 * @param encryptionIv For AES encryption chunks, the encryption initialization vector.
 */
public HlsMediaChunk(DataSource dataSource, DataSpec dataSpec, DataSpec initDataSpec,
    HlsUrl hlsUrl, List<Format> muxedCaptionFormats, int trackSelectionReason,
    Object trackSelectionData, long startTimeUs, long endTimeUs, int chunkIndex,
    int discontinuitySequenceNumber, boolean isMasterTimestampSource,
    TimestampAdjuster timestampAdjuster, HlsMediaChunk previousChunk, byte[] encryptionKey,
    byte[] encryptionIv) {
  super(buildDataSource(dataSource, encryptionKey, encryptionIv), dataSpec, hlsUrl.format,
      trackSelectionReason, trackSelectionData, startTimeUs, endTimeUs, chunkIndex);
  this.discontinuitySequenceNumber = discontinuitySequenceNumber;
  this.initDataSpec = initDataSpec;
  this.hlsUrl = hlsUrl;
  this.muxedCaptionFormats = muxedCaptionFormats;
  this.isMasterTimestampSource = isMasterTimestampSource;
  this.timestampAdjuster = timestampAdjuster;
  // Note: this.dataSource and dataSource may be different.
  this.isEncrypted = this.dataSource instanceof Aes128DataSource;
  lastPathSegment = dataSpec.uri.getLastPathSegment();
  isPackedAudio = lastPathSegment.endsWith(AAC_FILE_EXTENSION)
      || lastPathSegment.endsWith(AC3_FILE_EXTENSION)
      || lastPathSegment.endsWith(EC3_FILE_EXTENSION)
      || lastPathSegment.endsWith(MP3_FILE_EXTENSION);
  if (previousChunk != null) {
    id3Decoder = previousChunk.id3Decoder;
    id3Data = previousChunk.id3Data;
    previousExtractor = previousChunk.extractor;
    shouldSpliceIn = previousChunk.hlsUrl != hlsUrl;
    needNewExtractor = previousChunk.discontinuitySequenceNumber != discontinuitySequenceNumber
        || shouldSpliceIn;
  } else {
    id3Decoder = isPackedAudio ? new Id3Decoder() : null;
    id3Data = isPackedAudio ? new ParsableByteArray(Id3Decoder.ID3_HEADER_LENGTH) : null;
    previousExtractor = null;
    shouldSpliceIn = false;
    needNewExtractor = true;
  }
  initDataSource = dataSource;
  uid = UID_SOURCE.getAndIncrement();
}
 

import com.google.android.exoplayer2.util.TimestampAdjuster; //导入依赖的package包/类
@Override
public void init(TimestampAdjuster timestampAdjuster, ExtractorOutput extractorOutput,
    TsPayloadReader.TrackIdGenerator idGenerator) {
  this.timestampAdjuster = timestampAdjuster;
  idGenerator.generateNewId();
  output = extractorOutput.track(idGenerator.getTrackId(), C.TRACK_TYPE_METADATA);
  output.format(Format.createSampleFormat(idGenerator.getFormatId(), MimeTypes.APPLICATION_SCTE35,
      null, Format.NO_VALUE, null));
}
 

import com.google.android.exoplayer2.util.TimestampAdjuster; //导入依赖的package包/类
/**
 * @param dataSource The source from which the data should be loaded.
 * @param dataSpec Defines the data to be loaded.
 * @param initDataSpec Defines the initialization data to be fed to new extractors. May be null.
 * @param hlsUrl The url of the playlist from which this chunk was obtained.
 * @param muxedCaptionFormats List of muxed caption {@link Format}s.
 * @param trackSelectionReason See {@link #trackSelectionReason}.
 * @param trackSelectionData See {@link #trackSelectionData}.
 * @param startTimeUs The start time of the chunk in microseconds.
 * @param endTimeUs The end time of the chunk in microseconds.
 * @param chunkIndex The media sequence number of the chunk.
 * @param discontinuitySequenceNumber The discontinuity sequence number of the chunk.
 * @param isMasterTimestampSource True if the chunk can initialize the timestamp adjuster.
 * @param timestampAdjuster Adjuster corresponding to the provided discontinuity sequence number.
 * @param previousChunk The {@link HlsMediaChunk} that preceded this one. May be null.
 * @param encryptionKey For AES encryption chunks, the encryption key.
 * @param encryptionIv For AES encryption chunks, the encryption initialization vector.
 */
public HlsMediaChunk(DataSource dataSource, DataSpec dataSpec, DataSpec initDataSpec,
    HlsUrl hlsUrl, List<Format> muxedCaptionFormats, int trackSelectionReason,
    Object trackSelectionData, long startTimeUs, long endTimeUs, int chunkIndex,
    int discontinuitySequenceNumber, boolean isMasterTimestampSource,
    TimestampAdjuster timestampAdjuster, HlsMediaChunk previousChunk, byte[] encryptionKey,
    byte[] encryptionIv) {
  super(buildDataSource(dataSource, encryptionKey, encryptionIv), dataSpec, hlsUrl.format,
      trackSelectionReason, trackSelectionData, startTimeUs, endTimeUs, chunkIndex);
  this.discontinuitySequenceNumber = discontinuitySequenceNumber;
  this.initDataSpec = initDataSpec;
  this.hlsUrl = hlsUrl;
  this.muxedCaptionFormats = muxedCaptionFormats;
  this.isMasterTimestampSource = isMasterTimestampSource;
  this.timestampAdjuster = timestampAdjuster;
  // Note: this.dataSource and dataSource may be different.
  this.isEncrypted = this.dataSource instanceof Aes128DataSource;
  lastPathSegment = dataSpec.uri.getLastPathSegment();
  isPackedAudio = lastPathSegment.endsWith(AAC_FILE_EXTENSION)
      || lastPathSegment.endsWith(AC3_FILE_EXTENSION)
      || lastPathSegment.endsWith(EC3_FILE_EXTENSION)
      || lastPathSegment.endsWith(MP3_FILE_EXTENSION);
  if (previousChunk != null) {
    id3Decoder = previousChunk.id3Decoder;
    id3Data = previousChunk.id3Data;
    previousExtractor = previousChunk.extractor;
    shouldSpliceIn = previousChunk.hlsUrl != hlsUrl;
    needNewExtractor = previousChunk.discontinuitySequenceNumber != discontinuitySequenceNumber
        || shouldSpliceIn;
  } else {
    id3Decoder = isPackedAudio ? new Id3Decoder() : null;
    id3Data = isPackedAudio ? new ParsableByteArray(Id3Decoder.ID3_HEADER_LENGTH) : null;
    previousExtractor = null;
    shouldSpliceIn = false;
    needNewExtractor = true;
  }
  initDataSource = dataSource;
  uid = UID_SOURCE.getAndIncrement();
}
 

import com.google.android.exoplayer2.util.TimestampAdjuster; //导入依赖的package包/类
@Before
public void setUp() {
  packetPayload = new byte[512];
  Arrays.fill(packetPayload, (byte) 0xFF);
  payloadReader = new CustomSectionPayloadReader();
  reader = new SectionReader(payloadReader);
  reader.init(new TimestampAdjuster(0), new FakeExtractorOutput(),
      new TsPayloadReader.TrackIdGenerator(0, 1));
}
 

import com.google.android.exoplayer2.util.TimestampAdjuster; //导入依赖的package包/类
private void loadMedia() throws IOException, InterruptedException {
  // If we previously fed part of this chunk to the extractor, we need to skip it this time. For
  // encrypted content we need to skip the data by reading it through the source, so as to ensure
  // correct decryption of the remainder of the chunk. For clear content, we can request the
  // remainder of the chunk directly.
  DataSpec loadDataSpec;
  boolean skipLoadedBytes;
  if (isEncrypted) {
    loadDataSpec = dataSpec;
    skipLoadedBytes = bytesLoaded != 0;
  } else {
    loadDataSpec = Util.getRemainderDataSpec(dataSpec, bytesLoaded);
    skipLoadedBytes = false;
  }
  if (!isMasterTimestampSource) {
    timestampAdjuster.waitUntilInitialized();
  } else if (timestampAdjuster.getFirstSampleTimestampUs() == TimestampAdjuster.DO_NOT_OFFSET) {
    // We're the master and we haven't set the desired first sample timestamp yet.
    timestampAdjuster.setFirstSampleTimestampUs(startTimeUs);
  }
  try {
    ExtractorInput input = new DefaultExtractorInput(dataSource,
        loadDataSpec.absoluteStreamPosition, dataSource.open(loadDataSpec));
    if (extractor == null) {
      // Media segment format is packed audio.
      long id3Timestamp = peekId3PrivTimestamp(input);
      extractor = buildPackedAudioExtractor(id3Timestamp != C.TIME_UNSET
          ? timestampAdjuster.adjustTsTimestamp(id3Timestamp) : startTimeUs);
    }
    if (skipLoadedBytes) {
      input.skipFully(bytesLoaded);
    }
    try {
      int result = Extractor.RESULT_CONTINUE;
      while (result == Extractor.RESULT_CONTINUE && !loadCanceled) {
        result = extractor.read(input, null);
      }
    } finally {
      bytesLoaded = (int) (input.getPosition() - dataSpec.absoluteStreamPosition);
    }
  } finally {
    Util.closeQuietly(dataSource);
  }
  loadCompleted = true;
}
 

import com.google.android.exoplayer2.util.TimestampAdjuster; //导入依赖的package包/类
public WebvttExtractor(String language, TimestampAdjuster timestampAdjuster) {
  this.language = language;
  this.timestampAdjuster = timestampAdjuster;
  this.sampleDataWrapper = new ParsableByteArray();
  sampleData = new byte[1024];
}
 

import com.google.android.exoplayer2.util.TimestampAdjuster; //导入依赖的package包/类
private void processSample() throws ParserException {
  ParsableByteArray webvttData = new ParsableByteArray(sampleData);

  // Validate the first line of the header.
  try {
    WebvttParserUtil.validateWebvttHeaderLine(webvttData);
  } catch (SubtitleDecoderException e) {
    throw new ParserException(e);
  }

  // Defaults to use if the header doesn't contain an X-TIMESTAMP-MAP header.
  long vttTimestampUs = 0;
  long tsTimestampUs = 0;

  // Parse the remainder of the header looking for X-TIMESTAMP-MAP.
  String line;
  while (!TextUtils.isEmpty(line = webvttData.readLine())) {
    if (line.startsWith("X-TIMESTAMP-MAP")) {
      Matcher localTimestampMatcher = LOCAL_TIMESTAMP.matcher(line);
      if (!localTimestampMatcher.find()) {
        throw new ParserException("X-TIMESTAMP-MAP doesn't contain local timestamp: " + line);
      }
      Matcher mediaTimestampMatcher = MEDIA_TIMESTAMP.matcher(line);
      if (!mediaTimestampMatcher.find()) {
        throw new ParserException("X-TIMESTAMP-MAP doesn't contain media timestamp: " + line);
      }
      vttTimestampUs = WebvttParserUtil.parseTimestampUs(localTimestampMatcher.group(1));
      tsTimestampUs = TimestampAdjuster.ptsToUs(
          Long.parseLong(mediaTimestampMatcher.group(1)));
    }
  }

  // Find the first cue header and parse the start time.
  Matcher cueHeaderMatcher = WebvttParserUtil.findNextCueHeader(webvttData);
  if (cueHeaderMatcher == null) {
    // No cues found. Don't output a sample, but still output a corresponding track.
    buildTrackOutput(0);
    return;
  }

  long firstCueTimeUs = WebvttParserUtil.parseTimestampUs(cueHeaderMatcher.group(1));
  long sampleTimeUs = timestampAdjuster.adjustSampleTimestamp(
      firstCueTimeUs + tsTimestampUs - vttTimestampUs);
  long subsampleOffsetUs = sampleTimeUs - firstCueTimeUs;
  // Output the track.
  TrackOutput trackOutput = buildTrackOutput(subsampleOffsetUs);
  // Output the sample.
  sampleDataWrapper.reset(sampleData, sampleSize);
  trackOutput.sampleData(sampleDataWrapper, sampleSize);
  trackOutput.sampleMetadata(sampleTimeUs, C.BUFFER_FLAG_KEY_FRAME, sampleSize, 0, null);
}
 

import com.google.android.exoplayer2.util.TimestampAdjuster; //导入依赖的package包/类
@Override
public void init(TimestampAdjuster timestampAdjuster, ExtractorOutput extractorOutput,
    TrackIdGenerator idGenerator) {
  // Do nothing.
}