com.google.android.exoplayer2.metadata.id3.Id3Decoder.FramePredicate Java Examples

The following examples show how to use com.google.android.exoplayer2.metadata.id3.Id3Decoder.FramePredicate. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: Mp3Extractor.java    From MediaSDK with Apache License 2.0 4 votes vote down vote up 
private boolean synchronize(ExtractorInput input, boolean sniffing)
    throws IOException, InterruptedException {
  int validFrameCount = 0;
  int candidateSynchronizedHeaderData = 0;
  int peekedId3Bytes = 0;
  int searchedBytes = 0;
  int searchLimitBytes = sniffing ? MAX_SNIFF_BYTES : MAX_SYNC_BYTES;
  input.resetPeekPosition();
  if (input.getPosition() == 0) {
    // We need to parse enough ID3 metadata to retrieve any gapless/seeking playback information
    // even if ID3 metadata parsing is disabled.
    boolean parseAllId3Frames = (flags & FLAG_DISABLE_ID3_METADATA) == 0;
    FramePredicate id3FramePredicate =
        parseAllId3Frames ? null : REQUIRED_ID3_FRAME_PREDICATE;
    metadata = id3Peeker.peekId3Data(input, id3FramePredicate);
    if (metadata != null) {
      gaplessInfoHolder.setFromMetadata(metadata);
    }
    peekedId3Bytes = (int) input.getPeekPosition();
    if (!sniffing) {
      input.skipFully(peekedId3Bytes);
    }
  }
  while (true) {
    if (peekEndOfStreamOrHeader(input)) {
      if (validFrameCount > 0) {
        // We reached the end of the stream but found at least one valid frame.
        break;
      }
      throw new EOFException();
    }
    scratch.setPosition(0);
    int headerData = scratch.readInt();
    int frameSize;
    if ((candidateSynchronizedHeaderData != 0
        && !headersMatch(headerData, candidateSynchronizedHeaderData))
        || (frameSize = MpegAudioHeader.getFrameSize(headerData)) == C.LENGTH_UNSET) {
      // The header doesn't match the candidate header or is invalid. Try the next byte offset.
      if (searchedBytes++ == searchLimitBytes) {
        if (!sniffing) {
          throw new ParserException("Searched too many bytes.");
        }
        return false;
      }
      validFrameCount = 0;
      candidateSynchronizedHeaderData = 0;
      if (sniffing) {
        input.resetPeekPosition();
        input.advancePeekPosition(peekedId3Bytes + searchedBytes);
      } else {
        input.skipFully(1);
      }
    } else {
      // The header matches the candidate header and/or is valid.
      validFrameCount++;
      if (validFrameCount == 1) {
        MpegAudioHeader.populateHeader(headerData, synchronizedHeader);
        candidateSynchronizedHeaderData = headerData;
      } else if (validFrameCount == 4) {
        break;
      }
      input.advancePeekPosition(frameSize - 4);
    }
  }
  // Prepare to read the synchronized frame.
  if (sniffing) {
    input.skipFully(peekedId3Bytes + searchedBytes);
  } else {
    input.resetPeekPosition();
  }
  synchronizedHeaderData = candidateSynchronizedHeaderData;
  return true;
}
Example #2
Source File: Mp3Extractor.java    From Telegram-FOSS with GNU General Public License v2.0 4 votes vote down vote up 
private boolean synchronize(ExtractorInput input, boolean sniffing)
    throws IOException, InterruptedException {
  int validFrameCount = 0;
  int candidateSynchronizedHeaderData = 0;
  int peekedId3Bytes = 0;
  int searchedBytes = 0;
  int searchLimitBytes = sniffing ? MAX_SNIFF_BYTES : MAX_SYNC_BYTES;
  input.resetPeekPosition();
  if (input.getPosition() == 0) {
    // We need to parse enough ID3 metadata to retrieve any gapless/seeking playback information
    // even if ID3 metadata parsing is disabled.
    boolean parseAllId3Frames = (flags & FLAG_DISABLE_ID3_METADATA) == 0;
    Id3Decoder.FramePredicate id3FramePredicate =
        parseAllId3Frames ? null : REQUIRED_ID3_FRAME_PREDICATE;
    metadata = id3Peeker.peekId3Data(input, id3FramePredicate);
    if (metadata != null) {
      gaplessInfoHolder.setFromMetadata(metadata);
    }
    peekedId3Bytes = (int) input.getPeekPosition();
    if (!sniffing) {
      input.skipFully(peekedId3Bytes);
    }
  }
  while (true) {
    if (peekEndOfStreamOrHeader(input)) {
      if (validFrameCount > 0) {
        // We reached the end of the stream but found at least one valid frame.
        break;
      }
      throw new EOFException();
    }
    scratch.setPosition(0);
    int headerData = scratch.readInt();
    int frameSize;
    if ((candidateSynchronizedHeaderData != 0
        && !headersMatch(headerData, candidateSynchronizedHeaderData))
        || (frameSize = MpegAudioHeader.getFrameSize(headerData)) == C.LENGTH_UNSET) {
      // The header doesn't match the candidate header or is invalid. Try the next byte offset.
      if (searchedBytes++ == searchLimitBytes) {
        if (!sniffing) {
          throw new ParserException("Searched too many bytes.");
        }
        return false;
      }
      validFrameCount = 0;
      candidateSynchronizedHeaderData = 0;
      if (sniffing) {
        input.resetPeekPosition();
        input.advancePeekPosition(peekedId3Bytes + searchedBytes);
      } else {
        input.skipFully(1);
      }
    } else {
      // The header matches the candidate header and/or is valid.
      validFrameCount++;
      if (validFrameCount == 1) {
        MpegAudioHeader.populateHeader(headerData, synchronizedHeader);
        candidateSynchronizedHeaderData = headerData;
      } else if (validFrameCount == 4) {
        break;
      }
      input.advancePeekPosition(frameSize - 4);
    }
  }
  // Prepare to read the synchronized frame.
  if (sniffing) {
    input.skipFully(peekedId3Bytes + searchedBytes);
  } else {
    input.resetPeekPosition();
  }
  synchronizedHeaderData = candidateSynchronizedHeaderData;
  return true;
}
Example #3
Source File: Mp3Extractor.java    From Telegram with GNU General Public License v2.0 4 votes vote down vote up 
private boolean synchronize(ExtractorInput input, boolean sniffing)
    throws IOException, InterruptedException {
  int validFrameCount = 0;
  int candidateSynchronizedHeaderData = 0;
  int peekedId3Bytes = 0;
  int searchedBytes = 0;
  int searchLimitBytes = sniffing ? MAX_SNIFF_BYTES : MAX_SYNC_BYTES;
  input.resetPeekPosition();
  if (input.getPosition() == 0) {
    // We need to parse enough ID3 metadata to retrieve any gapless/seeking playback information
    // even if ID3 metadata parsing is disabled.
    boolean parseAllId3Frames = (flags & FLAG_DISABLE_ID3_METADATA) == 0;
    Id3Decoder.FramePredicate id3FramePredicate =
        parseAllId3Frames ? null : REQUIRED_ID3_FRAME_PREDICATE;
    metadata = id3Peeker.peekId3Data(input, id3FramePredicate);
    if (metadata != null) {
      gaplessInfoHolder.setFromMetadata(metadata);
    }
    peekedId3Bytes = (int) input.getPeekPosition();
    if (!sniffing) {
      input.skipFully(peekedId3Bytes);
    }
  }
  while (true) {
    if (peekEndOfStreamOrHeader(input)) {
      if (validFrameCount > 0) {
        // We reached the end of the stream but found at least one valid frame.
        break;
      }
      throw new EOFException();
    }
    scratch.setPosition(0);
    int headerData = scratch.readInt();
    int frameSize;
    if ((candidateSynchronizedHeaderData != 0
        && !headersMatch(headerData, candidateSynchronizedHeaderData))
        || (frameSize = MpegAudioHeader.getFrameSize(headerData)) == C.LENGTH_UNSET) {
      // The header doesn't match the candidate header or is invalid. Try the next byte offset.
      if (searchedBytes++ == searchLimitBytes) {
        if (!sniffing) {
          throw new ParserException("Searched too many bytes.");
        }
        return false;
      }
      validFrameCount = 0;
      candidateSynchronizedHeaderData = 0;
      if (sniffing) {
        input.resetPeekPosition();
        input.advancePeekPosition(peekedId3Bytes + searchedBytes);
      } else {
        input.skipFully(1);
      }
    } else {
      // The header matches the candidate header and/or is valid.
      validFrameCount++;
      if (validFrameCount == 1) {
        MpegAudioHeader.populateHeader(headerData, synchronizedHeader);
        candidateSynchronizedHeaderData = headerData;
      } else if (validFrameCount == 4) {
        break;
      }
      input.advancePeekPosition(frameSize - 4);
    }
  }
  // Prepare to read the synchronized frame.
  if (sniffing) {
    input.skipFully(peekedId3Bytes + searchedBytes);
  } else {
    input.resetPeekPosition();
  }
  synchronizedHeaderData = candidateSynchronizedHeaderData;
  return true;
}