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

/**
 * Creates a Flac decoder.
 *
 * @param numInputBuffers The number of input buffers.
 * @param numOutputBuffers The number of output buffers.
 * @param initializationData Codec-specific initialization data. It should contain only one entry
 *    which is the flac file header.
 * @throws FlacDecoderException Thrown if an exception occurs when initializing the decoder.
 */
public FlacDecoder(int numInputBuffers, int numOutputBuffers, List<byte[]> initializationData)
    throws FlacDecoderException {
  super(new DecoderInputBuffer[numInputBuffers], new SimpleOutputBuffer[numOutputBuffers]);
  if (initializationData.size() != 1) {
    throw new FlacDecoderException("Initialization data must be of length 1");
  }
  decoderJni = new FlacDecoderJni();
  decoderJni.setData(ByteBuffer.wrap(initializationData.get(0)));
  FlacStreamInfo streamInfo;
  try {
    streamInfo = decoderJni.decodeMetadata();
  } catch (IOException | InterruptedException e) {
    // Never happens.
    throw new IllegalStateException(e);
  }
  if (streamInfo == null) {
    throw new FlacDecoderException("Metadata decoding failed");
  }

  setInitialInputBufferSize(streamInfo.maxFrameSize);
  maxOutputBufferSize = streamInfo.maxDecodedFrameSize();
}
 

public FlacBinarySearchSeeker(
    FlacStreamInfo streamInfo,
    long firstFramePosition,
    long inputLength,
    FlacDecoderJni decoderJni) {
  super(
      new FlacSeekTimestampConverter(streamInfo),
      new FlacTimestampSeeker(decoderJni),
      streamInfo.durationUs(),
      /* floorTimePosition= */ 0,
      /* ceilingTimePosition= */ streamInfo.totalSamples,
      /* floorBytePosition= */ firstFramePosition,
      /* ceilingBytePosition= */ inputLength,
      /* approxBytesPerFrame= */ streamInfo.getApproxBytesPerFrame(),
      /* minimumSearchRange= */ Math.max(1, streamInfo.minFrameSize));
  this.decoderJni = Assertions.checkNotNull(decoderJni);
}
 

private void outputFormat(FlacStreamInfo streamInfo) {
  Format mediaFormat =
      Format.createAudioSampleFormat(
          /* id= */ null,
          MimeTypes.AUDIO_RAW,
          /* codecs= */ null,
          streamInfo.bitRate(),
          streamInfo.maxDecodedFrameSize(),
          streamInfo.channels,
          streamInfo.sampleRate,
          getPcmEncoding(streamInfo.bitsPerSample),
          /* encoderDelay= */ 0,
          /* encoderPadding= */ 0,
          /* initializationData= */ null,
          /* drmInitData= */ null,
          /* selectionFlags= */ 0,
          /* language= */ null,
          isId3MetadataDisabled ? null : id3Metadata);
  trackOutput.format(mediaFormat);
}
 

private void outputFormat(FlacStreamInfo streamInfo) {
  Format mediaFormat =
      Format.createAudioSampleFormat(
          /* id= */ null,
          MimeTypes.AUDIO_RAW,
          /* codecs= */ null,
          streamInfo.bitRate(),
          streamInfo.maxDecodedFrameSize(),
          streamInfo.channels,
          streamInfo.sampleRate,
          getPcmEncoding(streamInfo.bitsPerSample),
          /* encoderDelay= */ 0,
          /* encoderPadding= */ 0,
          /* initializationData= */ null,
          /* drmInitData= */ null,
          /* selectionFlags= */ 0,
          /* language= */ null,
          isId3MetadataDisabled ? null : id3Metadata);
  trackOutput.format(mediaFormat);
}
 

public FlacBinarySearchSeeker(
    FlacStreamInfo streamInfo,
    long firstFramePosition,
    long inputLength,
    FlacDecoderJni decoderJni) {
  super(
      new FlacSeekTimestampConverter(streamInfo),
      new FlacTimestampSeeker(decoderJni),
      streamInfo.durationUs(),
      /* floorTimePosition= */ 0,
      /* ceilingTimePosition= */ streamInfo.totalSamples,
      /* floorBytePosition= */ firstFramePosition,
      /* ceilingBytePosition= */ inputLength,
      /* approxBytesPerFrame= */ streamInfo.getApproxBytesPerFrame(),
      /* minimumSearchRange= */ Math.max(1, streamInfo.minFrameSize));
  this.decoderJni = Assertions.checkNotNull(decoderJni);
}
 

private void updateFlacStreamInfo(ExtractorInput input, FlacStreamInfo streamInfo) {
  this.streamInfo = streamInfo;
  outputSeekMap(input, streamInfo);
  outputFormat(streamInfo);
  outputBuffer = new ParsableByteArray(streamInfo.maxDecodedFrameSize());
  outputByteBuffer = ByteBuffer.wrap(outputBuffer.data);
  outputFrameHolder = new BinarySearchSeeker.OutputFrameHolder(outputByteBuffer);
}
 

/**
 * Creates a Flac decoder.
 *
 * @param numInputBuffers The number of input buffers.
 * @param numOutputBuffers The number of output buffers.
 * @param maxInputBufferSize The maximum required input buffer size if known, or {@link
 *     Format#NO_VALUE} otherwise.
 * @param initializationData Codec-specific initialization data. It should contain only one entry
 *     which is the flac file header.
 * @throws FlacDecoderException Thrown if an exception occurs when initializing the decoder.
 */
public FlacDecoder(
    int numInputBuffers,
    int numOutputBuffers,
    int maxInputBufferSize,
    List<byte[]> initializationData)
    throws FlacDecoderException {
  super(new DecoderInputBuffer[numInputBuffers], new SimpleOutputBuffer[numOutputBuffers]);
  if (initializationData.size() != 1) {
    throw new FlacDecoderException("Initialization data must be of length 1");
  }
  decoderJni = new FlacDecoderJni();
  decoderJni.setData(ByteBuffer.wrap(initializationData.get(0)));
  FlacStreamInfo streamInfo;
  try {
    streamInfo = decoderJni.decodeMetadata();
  } catch (IOException | InterruptedException e) {
    // Never happens.
    throw new IllegalStateException(e);
  }
  if (streamInfo == null) {
    throw new FlacDecoderException("Metadata decoding failed");
  }

  int initialInputBufferSize =
      maxInputBufferSize != Format.NO_VALUE ? maxInputBufferSize : streamInfo.maxFrameSize;
  setInitialInputBufferSize(initialInputBufferSize);
  maxOutputBufferSize = streamInfo.maxDecodedFrameSize();
}
 

private SeekMap getSeekMapForNonSeekTableFlac(ExtractorInput input, FlacStreamInfo streamInfo) {
  long inputLength = input.getLength();
  if (inputLength != C.LENGTH_UNSET) {
    long firstFramePosition = decoderJni.getDecodePosition();
    flacBinarySearchSeeker =
        new FlacBinarySearchSeeker(streamInfo, firstFramePosition, inputLength, decoderJni);
    return flacBinarySearchSeeker.getSeekMap();
  } else { // can't seek at all, because there's no SeekTable and the input length is unknown.
    return new SeekMap.Unseekable(streamInfo.durationUs());
  }
}
 

private void outputSeekMap(ExtractorInput input, FlacStreamInfo streamInfo) {
  boolean hasSeekTable = decoderJni.getSeekPosition(0) != -1;
  SeekMap seekMap =
      hasSeekTable
          ? new FlacSeekMap(streamInfo.durationUs(), decoderJni)
          : getSeekMapForNonSeekTableFlac(input, streamInfo);
  extractorOutput.seekMap(seekMap);
}
 

private FlacStreamInfo decodeStreamInfo(ExtractorInput input)
    throws InterruptedException, IOException {
  try {
    FlacStreamInfo streamInfo = decoderJni.decodeMetadata();
    if (streamInfo == null) {
      throw new IOException("Metadata decoding failed");
    }
    return streamInfo;
  } catch (IOException e) {
    decoderJni.reset(0);
    input.setRetryPosition(0, e);
    throw e;
  }
}
 

private void updateFlacStreamInfo(ExtractorInput input, FlacStreamInfo streamInfo) {
  this.streamInfo = streamInfo;
  outputSeekMap(input, streamInfo);
  outputFormat(streamInfo);
  outputBuffer = new ParsableByteArray(streamInfo.maxDecodedFrameSize());
  outputByteBuffer = ByteBuffer.wrap(outputBuffer.data);
  outputFrameHolder = new BinarySearchSeeker.OutputFrameHolder(outputByteBuffer);
}
 

private void readPastStreamInfo(ExtractorInput input) throws InterruptedException, IOException {
  if (readPastStreamInfo) {
    return;
  }

  FlacStreamInfo streamInfo = decodeStreamInfo(input);
  readPastStreamInfo = true;
  if (this.streamInfo == null) {
    updateFlacStreamInfo(input, streamInfo);
  }
}
 

/**
 * Creates a Flac decoder.
 *
 * @param numInputBuffers The number of input buffers.
 * @param numOutputBuffers The number of output buffers.
 * @param maxInputBufferSize The maximum required input buffer size if known, or {@link
 *     Format#NO_VALUE} otherwise.
 * @param initializationData Codec-specific initialization data. It should contain only one entry
 *     which is the flac file header.
 * @throws FlacDecoderException Thrown if an exception occurs when initializing the decoder.
 */
public FlacDecoder(
    int numInputBuffers,
    int numOutputBuffers,
    int maxInputBufferSize,
    List<byte[]> initializationData)
    throws FlacDecoderException {
  super(new DecoderInputBuffer[numInputBuffers], new SimpleOutputBuffer[numOutputBuffers]);
  if (initializationData.size() != 1) {
    throw new FlacDecoderException("Initialization data must be of length 1");
  }
  decoderJni = new FlacDecoderJni();
  decoderJni.setData(ByteBuffer.wrap(initializationData.get(0)));
  FlacStreamInfo streamInfo;
  try {
    streamInfo = decoderJni.decodeMetadata();
  } catch (IOException | InterruptedException e) {
    // Never happens.
    throw new IllegalStateException(e);
  }
  if (streamInfo == null) {
    throw new FlacDecoderException("Metadata decoding failed");
  }

  int initialInputBufferSize =
      maxInputBufferSize != Format.NO_VALUE ? maxInputBufferSize : streamInfo.maxFrameSize;
  setInitialInputBufferSize(initialInputBufferSize);
  maxOutputBufferSize = streamInfo.maxDecodedFrameSize();
}
 

private SeekMap getSeekMapForNonSeekTableFlac(ExtractorInput input, FlacStreamInfo streamInfo) {
  long inputLength = input.getLength();
  if (inputLength != C.LENGTH_UNSET) {
    long firstFramePosition = decoderJni.getDecodePosition();
    flacBinarySearchSeeker =
        new FlacBinarySearchSeeker(streamInfo, firstFramePosition, inputLength, decoderJni);
    return flacBinarySearchSeeker.getSeekMap();
  } else { // can't seek at all, because there's no SeekTable and the input length is unknown.
    return new SeekMap.Unseekable(streamInfo.durationUs());
  }
}
 

private void outputSeekMap(ExtractorInput input, FlacStreamInfo streamInfo) {
  boolean hasSeekTable = decoderJni.getSeekPosition(0) != -1;
  SeekMap seekMap =
      hasSeekTable
          ? new FlacSeekMap(streamInfo.durationUs(), decoderJni)
          : getSeekMapForNonSeekTableFlac(input, streamInfo);
  extractorOutput.seekMap(seekMap);
}
 

private FlacStreamInfo decodeStreamInfo(ExtractorInput input)
    throws InterruptedException, IOException {
  try {
    FlacStreamInfo streamInfo = decoderJni.decodeMetadata();
    if (streamInfo == null) {
      throw new IOException("Metadata decoding failed");
    }
    return streamInfo;
  } catch (IOException e) {
    decoderJni.reset(0);
    input.setRetryPosition(0, e);
    throw e;
  }
}
 

private void readPastStreamInfo(ExtractorInput input) throws InterruptedException, IOException {
  if (readPastStreamInfo) {
    return;
  }

  FlacStreamInfo streamInfo = decodeStreamInfo(input);
  readPastStreamInfo = true;
  if (this.streamInfo == null) {
    updateFlacStreamInfo(input, streamInfo);
  }
}
 

private native FlacStreamInfo flacDecodeMetadata(long context)
throws IOException, InterruptedException;
 

/** Decodes and consumes the StreamInfo section from the FLAC stream. */
public FlacStreamInfo decodeMetadata() throws IOException, InterruptedException {
  return flacDecodeMetadata(nativeDecoderContext);
}
 

public FlacSeekTimestampConverter(FlacStreamInfo streamInfo) {
  this.streamInfo = streamInfo;
}
 

public FlacSeekTimestampConverter(FlacStreamInfo streamInfo) {
  this.streamInfo = streamInfo;
}
 

/** Decodes and consumes the StreamInfo section from the FLAC stream. */
public FlacStreamInfo decodeMetadata() throws IOException, InterruptedException {
  return flacDecodeMetadata(nativeDecoderContext);
}
 

private native FlacStreamInfo flacDecodeMetadata(long context)
throws IOException, InterruptedException;
 

public FlacStreamInfo decodeMetadata() throws IOException, InterruptedException {
  return flacDecodeMetadata(nativeDecoderContext);
}
 

private native FlacStreamInfo flacDecodeMetadata(long context)
throws IOException, InterruptedException;