Java Extractor类代码示例

import com.google.android.exoplayer.extractor.Extractor; //导入依赖的package包/类
@Override
public void buildRenderers(ExoPlayerHelper player) {
    Allocator allocator = new DefaultAllocator(BUFFER_SEGMENT_SIZE);

    // Build the video and audio renderers.
    Extractor webmExtractor = new WebmExtractor();
    Extractor mp4Extractor = new Mp4Extractor();
    DataSource dataSource = new FileDataSource();
    ExtractorSampleSource sampleSource = new ExtractorSampleSource(uri, dataSource, allocator,
            BUFFER_SEGMENT_COUNT * BUFFER_SEGMENT_SIZE, webmExtractor, mp4Extractor);
    MediaCodecVideoTrackRenderer videoRenderer = new MediaCodecVideoTrackRenderer(context,
            sampleSource, MediaCodecSelector.DEFAULT, MediaCodec.VIDEO_SCALING_MODE_SCALE_TO_FIT, 5000, player.getMainHandler(),
            player, 50);
    MediaCodecAudioTrackRenderer audioRenderer = new MediaCodecAudioTrackRenderer(sampleSource, MediaCodecSelector.DEFAULT,
            null, true, player.getMainHandler(), player);
    TrackRenderer textRenderer = new TextTrackRenderer(sampleSource, player,
            player.getMainHandler().getLooper());

    // Invoke the callback.
    TrackRenderer[] renderers = new TrackRenderer[ExoPlayerHelper.RENDERER_COUNT];
    renderers[ExoPlayerHelper.TYPE_VIDEO] = videoRenderer;
    renderers[ExoPlayerHelper.TYPE_AUDIO] = audioRenderer;
    renderers[ExoPlayerHelper.TYPE_TEXT] = textRenderer;
    player.onRenderers(renderers, null);
}
 

import com.google.android.exoplayer.extractor.Extractor; //导入依赖的package包/类
@Override
public int read(ExtractorInput input, PositionHolder seekPosition)
    throws IOException, InterruptedException {
  while (true) {
    switch (parserState) {
      case STATE_READING_ATOM_HEADER:
        if (!readAtomHeader(input)) {
          return Extractor.RESULT_END_OF_INPUT;
        }
        break;
      case STATE_READING_ATOM_PAYLOAD:
        readAtomPayload(input);
        break;
      case STATE_READING_ENCRYPTION_DATA:
        readEncryptionData(input);
        break;
      default:
        if (readSample(input)) {
          return RESULT_CONTINUE;
        }
    }
  }
}
 

import com.google.android.exoplayer.extractor.Extractor; //导入依赖的package包/类
@SuppressWarnings("NonAtomicVolatileUpdate")
@Override
public void load() throws IOException, InterruptedException {
  DataSpec loadDataSpec = Util.getRemainderDataSpec(dataSpec, bytesLoaded);
  try {
    // Create and open the input.
    ExtractorInput input = new DefaultExtractorInput(dataSource,
        loadDataSpec.absoluteStreamPosition, dataSource.open(loadDataSpec));
    if (bytesLoaded == 0) {
      // Set the target to ourselves.
      extractorWrapper.init(this);
    }
    // Load and parse the initialization data.
    try {
      int result = Extractor.RESULT_CONTINUE;
      while (result == Extractor.RESULT_CONTINUE && !loadCanceled) {
        result = extractorWrapper.read(input);
      }
    } finally {
      bytesLoaded = (int) (input.getPosition() - dataSpec.absoluteStreamPosition);
    }
  } finally {
    dataSource.close();
  }
}
 

import com.google.android.exoplayer.extractor.Extractor; //导入依赖的package包/类
@SuppressWarnings("NonAtomicVolatileUpdate")
@Override
public final void load() throws IOException, InterruptedException {
  DataSpec loadDataSpec = Util.getRemainderDataSpec(dataSpec, bytesLoaded);
  try {
    // Create and open the input.
    ExtractorInput input = new DefaultExtractorInput(dataSource,
        loadDataSpec.absoluteStreamPosition, dataSource.open(loadDataSpec));
    if (bytesLoaded == 0) {
      // Set the target to ourselves.
      extractorWrapper.init(this);
    }
    // Load and parse the initialization data.
    try {
      int result = Extractor.RESULT_CONTINUE;
      while (result == Extractor.RESULT_CONTINUE && !loadCanceled) {
        result = extractorWrapper.read(input);
      }
    } finally {
      bytesLoaded = (int) (input.getPosition() - dataSpec.absoluteStreamPosition);
    }
  } finally {
    dataSource.close();
  }
}
 

import com.google.android.exoplayer.extractor.Extractor; //导入依赖的package包/类
@Override
public int read(ExtractorInput input, PositionHolder seekPosition)
    throws IOException, InterruptedException {
  int currentFileSize = (int) input.getLength();

  // Increase the size of sampleData if necessary.
  if (sampleSize == sampleData.length) {
    sampleData = Arrays.copyOf(sampleData,
        (currentFileSize != C.LENGTH_UNBOUNDED ? currentFileSize : sampleData.length) * 3 / 2);
  }

  // Consume to the input.
  int bytesRead = input.read(sampleData, sampleSize, sampleData.length - sampleSize);
  if (bytesRead != C.RESULT_END_OF_INPUT) {
    sampleSize += bytesRead;
    if (currentFileSize == C.LENGTH_UNBOUNDED || sampleSize != currentFileSize) {
      return Extractor.RESULT_CONTINUE;
    }
  }

  // We've reached the end of the input, which corresponds to the end of the current file.
  processSample();
  return Extractor.RESULT_END_OF_INPUT;
}
 

import com.google.android.exoplayer.extractor.Extractor; //导入依赖的package包/类
@Override
public final int read(ExtractorInput input, PositionHolder seekPosition)
    throws IOException, InterruptedException {
  while (true) {
    switch (parserState) {
      case STATE_READING_ATOM_HEADER:
        if (!readAtomHeader(input)) {
          return Extractor.RESULT_END_OF_INPUT;
        }
        break;
      case STATE_READING_ATOM_PAYLOAD:
        readAtomPayload(input);
        break;
      case STATE_READING_ENCRYPTION_DATA:
        readEncryptionData(input);
        break;
      default:
        if (readSample(input)) {
          return RESULT_CONTINUE;
        }
    }
  }
}
 

import com.google.android.exoplayer.extractor.Extractor; //导入依赖的package包/类
@SuppressWarnings("NonAtomicVolatileUpdate")
@Override
public final void load() throws IOException, InterruptedException {
  DataSpec loadDataSpec = Util.getRemainderDataSpec(dataSpec, bytesLoaded);
  try {
    // Create and open the input.
    ExtractorInput input = new DefaultExtractorInput(dataSource,
        loadDataSpec.absoluteStreamPosition, dataSource.open(loadDataSpec));
    if (bytesLoaded == 0) {
      // Set the target to ourselves.
      extractorWrapper.init(this);
    }
    // Load and parse the sample data.
    try {
      int result = Extractor.RESULT_CONTINUE;
      while (result == Extractor.RESULT_CONTINUE && !loadCanceled) {
        result = extractorWrapper.read(input);
      }
    } finally {
      bytesLoaded = (int) (input.getPosition() - dataSpec.absoluteStreamPosition);
    }
  } finally {
    dataSource.close();
  }
}
 

import com.google.android.exoplayer.extractor.Extractor; //导入依赖的package包/类
public HlsExtractorWrapper(int trigger, Format format, long startTimeUs, Extractor extractor,
    boolean shouldSpliceIn) {
  this.trigger = trigger;
  this.format = format;
  this.startTimeUs = startTimeUs;
  this.extractor = extractor;
  this.shouldSpliceIn = shouldSpliceIn;
  sampleQueues = new SparseArray<>();
}
 

import com.google.android.exoplayer.extractor.Extractor; //导入依赖的package包/类
@Override
public void load() 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;
  }

  try {
    ExtractorInput input = new DefaultExtractorInput(dataSource,
        loadDataSpec.absoluteStreamPosition, dataSource.open(loadDataSpec));
    if (skipLoadedBytes) {
      input.skipFully(bytesLoaded);
    }
    try {
      int result = Extractor.RESULT_CONTINUE;
      while (result == Extractor.RESULT_CONTINUE && !loadCanceled) {
        result = extractorWrapper.read(input);
      }
    } finally {
      bytesLoaded = (int) (input.getPosition() - dataSpec.absoluteStreamPosition);
    }
  } finally {
    dataSource.close();
  }
}
 

import com.google.android.exoplayer.extractor.Extractor; //导入依赖的package包/类
@Override
public int read(ExtractorInput input, PositionHolder seekPosition) throws IOException,
    InterruptedException {
  sampleRead = false;
  boolean continueReading = true;
  while (continueReading && !sampleRead) {
    continueReading = reader.read(input);
    if (continueReading && maybeSeekForCues(seekPosition, input.getPosition())) {
      return Extractor.RESULT_SEEK;
    }
  }
  return continueReading ? Extractor.RESULT_CONTINUE : Extractor.RESULT_END_OF_INPUT;
}
 

import com.google.android.exoplayer.extractor.Extractor; //导入依赖的package包/类
public HlsExtractorWrapper(int trigger, Format format, long startTimeUs, Extractor extractor,
    boolean shouldSpliceIn, int adaptiveMaxWidth, int adaptiveMaxHeight) {
  this.trigger = trigger;
  this.format = format;
  this.startTimeUs = startTimeUs;
  this.extractor = extractor;
  this.shouldSpliceIn = shouldSpliceIn;
  this.adaptiveMaxWidth = adaptiveMaxWidth;
  this.adaptiveMaxHeight = adaptiveMaxHeight;
  sampleQueues = new SparseArray<>();
}
 

import com.google.android.exoplayer.extractor.Extractor; //导入依赖的package包/类
public static void consumeTestData(Extractor extractor, byte[] data)
    throws IOException, InterruptedException {
  FakeExtractorInput input = new FakeExtractorInput.Builder().setData(data).build();
  PositionHolder seekPositionHolder = new PositionHolder();
  int readResult = Extractor.RESULT_CONTINUE;
  while (readResult != Extractor.RESULT_END_OF_INPUT) {
    readResult = extractor.read(input, seekPositionHolder);
    if (readResult == Extractor.RESULT_SEEK) {
      long seekPosition = seekPositionHolder.position;
      Assertions.checkState(0 < seekPosition && seekPosition <= Integer.MAX_VALUE);
      input.setPosition((int) seekPosition);
    }
  }
}
 

import com.google.android.exoplayer.extractor.Extractor; //导入依赖的package包/类
public static void consumeTestData(Extractor extractor, byte[] data)
    throws IOException, InterruptedException {
  ExtractorInput input = createTestExtractorInput(data);
  PositionHolder seekPositionHolder = new PositionHolder();
  int readResult = Extractor.RESULT_CONTINUE;
  while (readResult != Extractor.RESULT_END_OF_INPUT) {
    readResult = extractor.read(input, seekPositionHolder);
    if (readResult == Extractor.RESULT_SEEK) {
      input = createTestExtractorInput(data, (int) seekPositionHolder.position);
    }
  }
}
 

import com.google.android.exoplayer.extractor.Extractor; //导入依赖的package包/类
/**
 * @param extractor The extractor to wrap.
 */
public ChunkExtractorWrapper(Extractor extractor) {
  this.extractor = extractor;
}
 

import com.google.android.exoplayer.extractor.Extractor; //导入依赖的package包/类
DashChunkSource(ManifestFetcher<MediaPresentationDescription> manifestFetcher,
    MediaPresentationDescription initialManifest, int adaptationSetIndex,
    int[] representationIndices, DataSource dataSource, FormatEvaluator formatEvaluator,
    Clock systemClock, long liveEdgeLatencyUs, long elapsedRealtimeOffsetUs,
    boolean startAtLiveEdge, Handler eventHandler, EventListener eventListener) {
  this.manifestFetcher = manifestFetcher;
  this.currentManifest = initialManifest;
  this.adaptationSetIndex = adaptationSetIndex;
  this.representationIndices = representationIndices;
  this.dataSource = dataSource;
  this.formatEvaluator = formatEvaluator;
  this.systemClock = systemClock;
  this.liveEdgeLatencyUs = liveEdgeLatencyUs;
  this.elapsedRealtimeOffsetUs = elapsedRealtimeOffsetUs;
  this.startAtLiveEdge = startAtLiveEdge;
  this.eventHandler = eventHandler;
  this.eventListener = eventListener;
  this.evaluation = new Evaluation();
  this.headerBuilder = new StringBuilder();
  this.seekRangeValues = new long[2];

  drmInitData = getDrmInitData(currentManifest, adaptationSetIndex);
  Representation[] representations = getFilteredRepresentations(currentManifest,
      adaptationSetIndex, representationIndices);
  long periodDurationUs = (representations[0].periodDurationMs == TrackRenderer.UNKNOWN_TIME_US)
      ? TrackRenderer.UNKNOWN_TIME_US : representations[0].periodDurationMs * 1000;
  this.trackInfo = new TrackInfo(representations[0].format.mimeType, periodDurationUs);

  this.formats = new Format[representations.length];
  this.representationHolders = new HashMap<>();
  int maxWidth = 0;
  int maxHeight = 0;
  for (int i = 0; i < representations.length; i++) {
    formats[i] = representations[i].format;
    maxWidth = Math.max(formats[i].width, maxWidth);
    maxHeight = Math.max(formats[i].height, maxHeight);
    Extractor extractor = mimeTypeIsWebm(formats[i].mimeType) ? new WebmExtractor()
        : new FragmentedMp4Extractor();
    representationHolders.put(formats[i].id,
        new RepresentationHolder(representations[i], new ChunkExtractorWrapper(extractor)));
  }
  this.maxWidth = maxWidth;
  this.maxHeight = maxHeight;
  Arrays.sort(formats, new DecreasingBandwidthComparator());
}