Example usage for java.nio.channels ReadableByteChannel read

List of usage examples for java.nio.channels ReadableByteChannel read

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Introduction

In this page you can find the example usage for java.nio.channels ReadableByteChannel read.

Prototype

public int read(ByteBuffer dst) throws IOException;

Source Link

Document

Reads a sequence of bytes from this channel into the given buffer.

Usage

From source file:net.pms.util.AudioUtils.java

/**
 * Parses the old RealAudio 1.0 and 2.0 formats that's not supported by
 * neither {@link org.jaudiotagger} nor MediaInfo. Returns {@code false} if
 * {@code channel} isn't one of these formats or the parsing fails.
 * <p>/*  ww  w  .  j  a  v  a  2s.co  m*/
 * Primary references:
 * <ul>
 * <li><a href="https://wiki.multimedia.cx/index.php/RealMedia">RealAudio on
 * MultimediaWiki</a></li>
 * <li><a
 * href="https://github.com/FFmpeg/FFmpeg/blob/master/libavformat/rmdec.c"
 * >FFmpeg rmdec.c</a></li>
 * </ul>
 *
 * @param channel the {@link Channel} containing the input. Size will only
 *            be parsed if {@code channel} is a {@link FileChannel}
 *            instance.
 * @param media the {@link DLNAMediaInfo} instance to write the parsing
 *            results to.
 * @return {@code true} if the {@code channel} input is in RealAudio 1.0 or
 *         2.0 format and the parsing succeeds; false otherwise
 */
public static boolean parseRealAudio(ReadableByteChannel channel, DLNAMediaInfo media) {
    final byte[] magicBytes = { 0x2E, 0x72, 0x61, (byte) 0xFD };
    ByteBuffer buffer = ByteBuffer.allocate(8);
    buffer.order(ByteOrder.BIG_ENDIAN);
    DLNAMediaAudio audio = new DLNAMediaAudio();
    try {
        int count = channel.read(buffer);
        if (count < 4) {
            LOGGER.trace("Input is too short to be RealAudio");
            return false;
        }
        buffer.flip();
        byte[] signature = new byte[4];
        buffer.get(signature);
        if (!Arrays.equals(magicBytes, signature)) {
            if (LOGGER.isTraceEnabled()) {
                LOGGER.trace("Input signature ({}) mismatches RealAudio version 1.0 or 2.0",
                        new String(signature, StandardCharsets.US_ASCII));
            }
            return false;
        }
        media.setContainer(FormatConfiguration.RA);
        short version = buffer.getShort();
        int reportedHeaderSize = 0;
        int reportedDataSize = 0;
        if (version == 3) {
            audio.setCodecA(FormatConfiguration.REALAUDIO_14_4);
            audio.getAudioProperties().setNumberOfChannels(1);
            audio.getAudioProperties().setSampleFrequency(8000);
            short headerSize = buffer.getShort();

            buffer = ByteBuffer.allocate(headerSize);
            channel.read(buffer);
            buffer.flip();
            buffer.position(8);
            int bytesPerMinute = buffer.getShort() & 0xFFFF;
            reportedDataSize = buffer.getInt();
            byte b = buffer.get();
            if (b != 0) {
                byte[] title = new byte[b & 0xFF];
                buffer.get(title);
                String titleString = new String(title, StandardCharsets.US_ASCII);
                audio.setSongname(titleString);
                audio.setAudioTrackTitleFromMetadata(titleString);
            }
            b = buffer.get();
            if (b != 0) {
                byte[] artist = new byte[b & 0xFF];
                buffer.get(artist);
                audio.setArtist(new String(artist, StandardCharsets.US_ASCII));
            }
            audio.setBitRate(bytesPerMinute * 8 / 60);
            media.setBitrate(bytesPerMinute * 8 / 60);
        } else if (version == 4 || version == 5) {
            buffer = ByteBuffer.allocate(14);
            channel.read(buffer);
            buffer.flip();
            buffer.get(signature);
            if (!".ra4".equals(new String(signature, StandardCharsets.US_ASCII))) {
                LOGGER.debug("Invalid RealAudio 2.0 signature \"{}\"",
                        new String(signature, StandardCharsets.US_ASCII));
                return false;
            }
            reportedDataSize = buffer.getInt();
            buffer.getShort(); //skip version repeated
            reportedHeaderSize = buffer.getInt();

            buffer = ByteBuffer.allocate(reportedHeaderSize);
            channel.read(buffer);
            buffer.flip();
            buffer.getShort(); // skip codec flavor
            buffer.getInt(); // skip coded frame size
            buffer.getInt(); // skip unknown
            long bytesPerMinute = buffer.getInt() & 0xFFFFFFFFL;
            buffer.getInt(); // skip unknown
            buffer.getShort(); // skip sub packet
            buffer.getShort(); // skip frame size
            buffer.getShort(); // skip sub packet size
            buffer.getShort(); // skip unknown
            if (version == 5) {
                buffer.position(buffer.position() + 6); // skip unknown
            }
            short sampleRate = buffer.getShort();
            buffer.getShort(); // skip unknown
            short sampleSize = buffer.getShort();
            short nrChannels = buffer.getShort();
            byte[] fourCC;
            if (version == 4) {
                buffer.position(buffer.get() + buffer.position()); // skip interleaver id
                fourCC = new byte[buffer.get()];
                buffer.get(fourCC);
            } else {
                buffer.getFloat(); // skip deinterlace id
                fourCC = new byte[4];
                buffer.get(fourCC);
            }
            String fourCCString = new String(fourCC, StandardCharsets.US_ASCII).toLowerCase(Locale.ROOT);
            switch (fourCCString) {
            case "lpcJ":
                audio.setCodecA(FormatConfiguration.REALAUDIO_14_4);
                break;
            case "28_8":
                audio.setCodecA(FormatConfiguration.REALAUDIO_28_8);
                break;
            case "dnet":
                audio.setCodecA(FormatConfiguration.AC3);
                break;
            case "sipr":
                audio.setCodecA(FormatConfiguration.SIPRO);
                break;
            case "cook":
                audio.setCodecA(FormatConfiguration.COOK);
            case "atrc":
                audio.setCodecA(FormatConfiguration.ATRAC);
            case "ralf":
                audio.setCodecA(FormatConfiguration.RALF);
            case "raac":
                audio.setCodecA(FormatConfiguration.AAC_LC);
            case "racp":
                audio.setCodecA(FormatConfiguration.HE_AAC);
            default:
                LOGGER.debug("Unknown RealMedia codec FourCC \"{}\" - parsing failed", fourCCString);
                return false;
            }

            if (buffer.hasRemaining()) {
                parseRealAudioMetaData(buffer, audio, version);
            }

            audio.setBitRate((int) (bytesPerMinute * 8 / 60));
            media.setBitrate((int) (bytesPerMinute * 8 / 60));
            audio.setBitsperSample(sampleSize);
            audio.getAudioProperties().setNumberOfChannels(nrChannels);
            audio.getAudioProperties().setSampleFrequency(sampleRate);
        } else {
            LOGGER.error("Could not parse RealAudio format - unknown format version {}", version);
            return false;
        }

        media.getAudioTracksList().add(audio);
        long fileSize = 0;
        if (channel instanceof FileChannel) {
            fileSize = ((FileChannel) channel).size();
            media.setSize(fileSize);
        }
        // Duration is estimated based on bitrate and might not be accurate
        if (audio.getBitRate() > 0) {
            int dataSize;
            if (fileSize > 0 && reportedHeaderSize > 0) {
                int fullHeaderSize = reportedHeaderSize + (version == 3 ? 8 : 16);
                if (reportedDataSize > 0) {
                    dataSize = (int) Math.min(reportedDataSize, fileSize - fullHeaderSize);
                } else {
                    dataSize = (int) (fileSize - fullHeaderSize);
                }
            } else {
                dataSize = reportedDataSize;
            }
            media.setDuration((double) dataSize / audio.getBitRate() * 8);
        }

    } catch (IOException e) {
        LOGGER.debug("Error while trying to parse RealAudio version 1 or 2: {}", e.getMessage());
        LOGGER.trace("", e);
        return false;
    }
    if (PMS.getConfiguration() != null
            && !PMS.getConfiguration().getAudioThumbnailMethod().equals(CoverSupplier.NONE)
            && (StringUtils.isNotBlank(media.getFirstAudioTrack().getSongname())
                    || StringUtils.isNotBlank(media.getFirstAudioTrack().getArtist()))) {
        ID3v1Tag tag = new ID3v1Tag();
        if (StringUtils.isNotBlank(media.getFirstAudioTrack().getSongname())) {
            tag.setTitle(media.getFirstAudioTrack().getSongname());
        }
        if (StringUtils.isNotBlank(media.getFirstAudioTrack().getArtist())) {
            tag.setArtist(media.getFirstAudioTrack().getArtist());
        }
        try {
            media.setThumb(DLNAThumbnail.toThumbnail(CoverUtil.get().getThumbnail(tag), 640, 480, ScaleType.MAX,
                    ImageFormat.SOURCE, false));
        } catch (IOException e) {
            LOGGER.error("An error occurred while generating thumbnail for RealAudio source: [\"{}\", \"{}\"]",
                    tag.getFirstTitle(), tag.getFirstArtist());
        }
    }
    media.setThumbready(true);
    media.setMediaparsed(true);

    return true;
}

From source file:org.alfresco.repo.transfer.HttpClientTransmitterImpl.java

private static void channelCopy(final ReadableByteChannel src, final WritableByteChannel dest)
        throws IOException {
    final ByteBuffer buffer = ByteBuffer.allocateDirect(2 * 1024);
    while (src.read(buffer) != -1) {
        // prepare the buffer to be drained
        buffer.flip();/* w  ww .j  av  a  2s .c om*/
        // write to the channel, may block
        dest.write(buffer);

        // If partial transfer, shift remainder down
        // If buffer is empty, same as doing clear()
        buffer.compact();
    }

    // EOF will leave buffer in fill state
    buffer.flip();

    // make sure the buffer is fully drained.
    while (buffer.hasRemaining()) {
        dest.write(buffer);
    }
}

From source file:org.geoserver.rest.util.IOUtils.java

/**
 * Copies the content of the source channel onto the destination channel.
 * /* w  ww .j  a  va  2  s.  c o m*/
 * @param bufferSize size of the temp buffer to use for this copy.
 * @param source the source {@link ReadableByteChannel}.
 * @param destination the destination {@link WritableByteChannel};.
 * @throws IOException in case something bad happens.
 */
public static void copyChannel(int bufferSize, ReadableByteChannel source, WritableByteChannel destination)
        throws IOException {

    inputNotNull(source, destination);
    if (!source.isOpen() || !destination.isOpen())
        throw new IllegalStateException("Source and destination channels must be open.");

    final java.nio.ByteBuffer buffer = java.nio.ByteBuffer.allocateDirect(bufferSize);
    while (source.read(buffer) != -1) {
        //prepare the buffer for draining
        buffer.flip();

        //write to destination
        while (buffer.hasRemaining())
            destination.write(buffer);

        //clear
        buffer.clear();

    }

}

From source file:it.unimi.di.big.mg4j.index.DiskBasedIndex.java

/** Commodity method for loading from a channel a big list of binary longs with specified endianness into a {@linkplain LongBigArrays long big array}.
 * //from www .  j  a v a 2s .  com
 * @param channel the channel.
 * @param byteOrder the endianness of the longs.
 * @return a big list of longs containing the longs returned by <code>channel</code>.
 */
public static LongBigArrayBigList loadLongBigList(final ReadableByteChannel channel, final long length,
        final ByteOrder byteOrder) throws IOException {
    final ByteBuffer byteBuffer = ByteBuffer.allocateDirect(BUFFER_SIZE).order(byteOrder);

    LongBigArrayBigList list = new LongBigArrayBigList(length);

    while (channel.read(byteBuffer) > 0) {
        byteBuffer.flip();
        while (byteBuffer.hasRemaining())
            list.add(byteBuffer.getLong());
        byteBuffer.clear();
    }

    return list;
}

From source file:com.sastix.cms.server.services.cache.CacheFileUtilsServiceImpl.java

@Override
public byte[] downloadResource(URL url) throws IOException {
    //create buffer with capacity in bytes
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    try {//from  w  w w  .  j av  a2s. co  m
        ByteBuffer bufIn = ByteBuffer.allocate(1024);
        ReadableByteChannel rbc = Channels.newChannel(url.openStream());
        int bytesRead;
        while ((bytesRead = rbc.read(bufIn)) > 0) {
            baos.write(bufIn.array(), 0, bytesRead);
            bufIn.rewind();
        }
        bufIn.clear();
        return baos.toByteArray();
    } finally {
        baos.close();
    }
}

From source file:org.mycore.common.content.util.MCRServletContentHelper.java

private static long copyChannel(final ReadableByteChannel src, final WritableByteChannel dest,
        final int bufferSize) throws IOException {
    if (src instanceof FileChannel) {
        return copyFileChannel((FileChannel) src, dest, bufferSize);
    }/*w  w  w.  jav a  2  s .  co  m*/
    long bytes = 0;
    final ByteBuffer buffer = ByteBuffer.allocateDirect(bufferSize);
    while (src.read(buffer) != -1) {
        // prepare the buffer to be drained
        buffer.flip();

        // write to the channel, may block
        bytes += dest.write(buffer);
        // If partial transfer, shift remainder down
        // If buffer is empty, same as doing clear()
        buffer.compact();
    }
    // EOF will leave buffer in fill state
    buffer.flip();
    // make sure the buffer is fully drained.
    while (buffer.hasRemaining()) {
        bytes += dest.write(buffer);
    }
    return bytes;
}

From source file:rascal.object.AbstractObjectFactory.java

public GitObject createObject(String name) throws IOException, CorruptedObjectException {
    ReadableByteChannel channel = getChannel(name);
    byte[] buffer = new byte[OBJECT_HEADER_BUFFER_LENGTH];
    channel.read(ByteBuffer.wrap(buffer));
    channel.close();//from   w  w  w .  j  a v a 2s.  c o m
    int headerSpaceIndex;
    int headerEndIndex;
    if ((headerSpaceIndex = ArrayUtils.indexOf(buffer, (byte) ' ')) == ArrayUtils.INDEX_NOT_FOUND
            || (headerEndIndex = ArrayUtils.indexOf(buffer, (byte) 0)) == ArrayUtils.INDEX_NOT_FOUND
            || headerSpaceIndex >= headerEndIndex) {
        throw new CorruptedObjectException(name, "Corrupted object header");
    }
    try {
        return createObject(name, buffer, headerSpaceIndex, headerEndIndex);
    } catch (UnknownObjectTypeException e) {
        throw new CorruptedObjectException(name, e);
    } catch (NumberFormatException e) {
        throw new CorruptedObjectException(name, e);
    }
}

From source file:com.web.searchlocal.flashpaper.thread.Covnert2SwfTask.java

/** 
 * /* ww  w  .  j a  va2  s .c  o  m*/
 */
public void excute() {
    String tmpOutFile = outFile.getPath().concat(File.separator)
            .concat(inFile.getName().replaceAll("[.]{1}.*$", ".swf"));
    List<String> commandArray = new ArrayList<String>();
    commandArray.add(defaultCommand);
    commandArray.add(inFile.getPath());
    commandArray.add("-o");
    commandArray.add(tmpOutFile);
    ProcessBuilder pbObj = new ProcessBuilder();
    pbObj.command(commandArray);
    pbObj.directory(outFile);
    pbObj.redirectErrorStream(true);
    try {
        Process proObj = pbObj.start();
        final InputStream ins = proObj.getInputStream();
        final ByteBuffer byteBuffer = ByteBuffer.allocate(1024);
        Thread th = new Thread() {
            public void run() {
                ReadableByteChannel rbcObj = Channels.newChannel(ins);
                try {
                    while (rbcObj.read(byteBuffer) != -1) {
                        byteBuffer.flip();
                        logger.info(java.nio.charset.Charset.defaultCharset().decode(byteBuffer));
                        byteBuffer.clear();
                    }
                } catch (IOException e) {
                    logger.error(e);
                }
            }
        };
        th.setDaemon(true);
        th.start();
        try {
            proObj.waitFor();
            logger.error("??." + tmpOutFile);
        } catch (InterruptedException e) {
            logger.error(e);
        }
    } catch (IOException e) {
        logger.error(e);
    }
}

From source file:com.bennavetta.appsite.file.ResourceService.java

private void copy(ReadableByteChannel src, WritableByteChannel dest) throws IOException {
    ByteBuffer buffer = ByteBuffer.allocateDirect(bufferSize.get());
    while (src.read(buffer) != -1 || buffer.position() != 0) {
        buffer.flip();/*w ww  . j av a 2 s.c o m*/
        dest.write(buffer);
        buffer.compact();
    }
}

From source file:com.github.matthesrieke.jprox.JProxViaParameterServlet.java

private void copyChannel(final ReadableByteChannel src, final WritableByteChannel dest) throws IOException {
    final ByteBuffer buffer = ByteBuffer.allocateDirect(16 * 1024);

    while (src.read(buffer) != -1) {
        buffer.flip();/*from w  w w .ja  v a 2s.c  o m*/
        dest.write(buffer);
        buffer.compact();
    }

    buffer.flip();

    while (buffer.hasRemaining()) {
        dest.write(buffer);
    }
}