Examples with MetadataContainer org.jaudiotagger.audio.asf.data.MetadataContainer used on opensource projects

Example 1 with MetadataContainer

use of org.jaudiotagger.audio.asf.data.MetadataContainer in project MusicDNA by harjot-oberai.

the class AsfFileWriter method writeTag.

/**
     * {@inheritDoc}
     */
@Override
protected void writeTag(final Tag tag, final RandomAccessFile raf, final RandomAccessFile rafTemp) throws CannotWriteException, IOException {
    /*
         * Since this implementation should not change the structure of the ASF
         * file (locations of content description chunks), we need to read the
         * content description chunk and the extended content description chunk
         * from the source file. In the second step we need to determine which
         * modifier (asf header or asf extended header) gets the appropriate
         * modifiers. The following policies are applied: if the source does not
         * contain any descriptor, the necessary descriptors are appended to the
         * header object.
         * 
         * if the source contains only one descriptor in the header extension
         * object, and the other type is needed as well, the other one will be
         * put into the header extension object.
         * 
         * for each descriptor type, if an object is found, an updater will be
         * configured.
         */
    final AsfHeader sourceHeader = AsfHeaderReader.readTagHeader(raf);
    // Reset for the streamer
    raf.seek(0);
    /*
         * Now createField modifiers for metadata descriptor and extended content
         * descriptor as implied by the given Tag.
         */
    // TODO not convinced that we need to copy fields here
    final AsfTag copy = new AsfTag(tag, true);
    final MetadataContainer[] distribution = TagConverter.distributeMetadata(copy);
    final boolean[] existHeader = searchExistence(sourceHeader, distribution);
    final boolean[] existExtHeader = searchExistence(sourceHeader.getExtendedHeader(), distribution);
    // Modifiers for the asf header object
    final List<ChunkModifier> headerModifier = new ArrayList<ChunkModifier>();
    // Modifiers for the asf header extension object
    final List<ChunkModifier> extHeaderModifier = new ArrayList<ChunkModifier>();
    for (int i = 0; i < distribution.length; i++) {
        final WriteableChunkModifer modifier = new WriteableChunkModifer(distribution[i]);
        if (existHeader[i]) {
            // Will remove or modify chunks in ASF header
            headerModifier.add(modifier);
        } else if (existExtHeader[i]) {
            // Will remove or modify chunks in extended header
            extHeaderModifier.add(modifier);
        } else {
            // Objects (chunks) will be added here.
            if (i == 0 || i == 2 || i == 1) {
                // Add content description and extended content description
                // at header for maximum compatibility
                headerModifier.add(modifier);
            } else {
                // For now, the rest should be created at extended header
                // since other positions aren'timer known.
                extHeaderModifier.add(modifier);
            }
        }
    }
    // change (performance)
    if (!extHeaderModifier.isEmpty()) {
        headerModifier.add(new AsfExtHeaderModifier(extHeaderModifier));
    }
    new AsfStreamer().createModifiedCopy(new RandomAccessFileInputstream(raf), new RandomAccessFileOutputStream(rafTemp), headerModifier);
}

Example 2 with MetadataContainer

use of org.jaudiotagger.audio.asf.data.MetadataContainer in project MusicDNA by harjot-oberai.

the class AsfFileReader method determineVariableBitrate.

/**
     * Determines if the "isVbr" field is set in the extended content
     * description.<br>
     * 
     * @param header
     *            the header to look up.
     * @return <code>true</code> if &quot;isVbr&quot; is present with a
     *         <code>true</code> value.
     */
private boolean determineVariableBitrate(final AsfHeader header) {
    assert header != null;
    boolean result = false;
    final MetadataContainer extDesc = header.findExtendedContentDescription();
    if (extDesc != null) {
        final List<MetadataDescriptor> descriptors = extDesc.getDescriptorsByName("IsVBR");
        if (descriptors != null && !descriptors.isEmpty()) {
            result = Boolean.TRUE.toString().equals(descriptors.get(0).getString());
        }
    }
    return result;
}