Examples of org.jaudiotagger.audio.mp4.atom.Mp4BoxHeader

org.jaudiotagger.audio.mp4.atom.NullPadding
Everything in MP4s are held in boxes (formally known as atoms), they are held as a hierachial tree within the MP4.
We are most interested in boxes that are used to hold metadata, but we have to know about some other boxes as well in order to find them.
All boxes consist of a 4 byte box length (big Endian), and then a 4 byte identifier, this is the header which is model in this class.
The length includes the length of the box including the identifier and the length itself. Then they may contain data and/or sub boxes, if they contain subboxes they are known as a parent box. Parent boxes shouldn't really contain data, but sometimes they do.
Parent boxes length includes the length of their immediate sub boxes
This class is normally used by instantiating with the empty constructor, then use the update method to pass the header data which is used to read the identifier and the the size of the box

    public void printAtomTree() {
        Enumeration<DefaultMutableTreeNode> e = rootNode.preorderEnumeration();
        DefaultMutableTreeNode nextNode;
        while (e.hasMoreElements()) {
            nextNode = e.nextElement();
            Mp4BoxHeader header = (Mp4BoxHeader) nextNode.getUserObject();
            if (header != null) {
                String tabbing = "";
                for (int i = 1; i < nextNode.getLevel(); i++) {
                    tabbing += "\t";
                }


                if (header instanceof NullPadding) {
                    System.out.println(tabbing + "Null pad " + " @ " + header.getFilePos() + " of size:" + header.getLength() + " ,ends @ " + (header.getFilePos() + header.getLength()));
                } else {
                    System.out.println(tabbing + "Atom " + header.getId() + " @ " + header.getFilePos() + " of size:" + header.getLength() + " ,ends @ " + (header.getFilePos() + header.getLength()));
                }
            }
        }
    }

View Full Code Here

     * @param parentNode
     * @throws IOException
     * @throws CannotReadException
     */
    public void buildChildrenOfNode(ByteBuffer moovBuffer, DefaultMutableTreeNode parentNode) throws IOException, CannotReadException {
        Mp4BoxHeader boxHeader;


        //Preprocessing for nodes that contain data before their children atoms
        Mp4BoxHeader parentBoxHeader = (Mp4BoxHeader) parentNode.getUserObject();


        //We set the buffers position back to this after processing the children
        int justAfterHeaderPos = moovBuffer.position();


        //Preprocessing for meta that normally contains 4 data bytes, but doesn't where found under track or tags atom
        if (parentBoxHeader.getId().equals(Mp4NotMetaFieldKey.META.getFieldName())) {
            Mp4MetaBox meta = new Mp4MetaBox(parentBoxHeader, moovBuffer);
            meta.processData();


            try {
                boxHeader = new Mp4BoxHeader(moovBuffer);
            } catch (NullBoxIdException nbe) {
                //It might be that the meta box didn't actually have any additional data after it so we adjust the buffer
                //to be immediately after metabox and code can retry
                moovBuffer.position(moovBuffer.position() - Mp4MetaBox.FLAGS_LENGTH);
            } finally {
                //Skip back last header cos this was only a test 
                moovBuffer.position(moovBuffer.position() - Mp4BoxHeader.HEADER_LENGTH);
            }
        }


        //Defines where to start looking for the first child node
        int startPos = moovBuffer.position();
        while (moovBuffer.position() < ((startPos + parentBoxHeader.getDataLength()) - Mp4BoxHeader.HEADER_LENGTH)) {
            boxHeader = new Mp4BoxHeader(moovBuffer);
            if (boxHeader != null) {
                boxHeader.setFilePos(moovHeader.getFilePos() + moovBuffer.position());//logger.finest("Atom " + boxHeader.getId() + " @ " + boxHeader.getFilePos() + " of size:" + boxHeader.getLength() + " ,ends @ " + (boxHeader.getFilePos() + boxHeader.getLength()));


                DefaultMutableTreeNode newAtom = new DefaultMutableTreeNode(boxHeader);
                parentNode.add(newAtom);


                if (boxHeader.getId().equals(Mp4NotMetaFieldKey.UDTA.getFieldName())) {
                    udtaNode = newAtom;
                }
                //only interested in metaNode that is child of udta node
                else if (boxHeader.getId().equals(Mp4NotMetaFieldKey.META.getFieldName()) && parentBoxHeader.getId().equals(Mp4NotMetaFieldKey.UDTA.getFieldName())) {
                    metaNode = newAtom;
                } else if (boxHeader.getId().equals(Mp4NotMetaFieldKey.HDLR.getFieldName()) && parentBoxHeader.getId().equals(Mp4NotMetaFieldKey.META.getFieldName())) {
                    hdlrWithinMetaNode = newAtom;
                } else if (boxHeader.getId().equals(Mp4NotMetaFieldKey.HDLR.getFieldName())) {
                    hdlrWithinMdiaNode = newAtom;
                } else if (boxHeader.getId().equals(Mp4NotMetaFieldKey.TAGS.getFieldName())) {
                    tagsNode = newAtom;
                } else if (boxHeader.getId().equals(Mp4NotMetaFieldKey.STCO.getFieldName())) {
                    if (stco == null) {
                        stco = new Mp4StcoBox(boxHeader, moovBuffer);
                        stcoNode = newAtom;
                    }
                } else if (boxHeader.getId().equals(Mp4NotMetaFieldKey.ILST.getFieldName())) {
                    DefaultMutableTreeNode parent = (DefaultMutableTreeNode) parentNode.getParent();
                    if (parent != null) {
                        Mp4BoxHeader parentsParent = (Mp4BoxHeader) (parent).getUserObject();
                        if (parentsParent != null) {
                            if (parentBoxHeader.getId().equals(Mp4NotMetaFieldKey.META.getFieldName()) && parentsParent.getId().equals(Mp4NotMetaFieldKey.UDTA.getFieldName())) {
                                ilstNode = newAtom;
                            }
                        }
                    }
                } else if (boxHeader.getId().equals(Mp4NotMetaFieldKey.FREE.getFieldName())) {

View Full Code Here


    }


    protected void build(ByteBuffer data) throws UnsupportedEncodingException {
        //Data actually contains a 'Data' Box so process data using this
        Mp4BoxHeader header = new Mp4BoxHeader(data);
        Mp4DataBox databox = new Mp4DataBox(header, data);
        dataSize = header.getDataLength();
        //Needed for subsequent write
        realDataLength = dataSize - Mp4DataBox.PRE_DATA_LENGTH;
        bytedata = databox.getByteData();
        content = databox.getContent();

View Full Code Here

        super(id, data);
    }


    protected void build(ByteBuffer data) throws UnsupportedEncodingException {
        //Data actually contains a 'Data' Box so process data using this
        Mp4BoxHeader header = new Mp4BoxHeader(data);
        Mp4DataBox databox = new Mp4DataBox(header, data);
        dataSize = header.getDataLength();
        numbers = databox.getNumbers();


        //Disc number always hold four values, we can discard the first one and last one, the second one is the disc no
        //and the third is the total no of discs so only use if not zero
        StringBuffer sb = new StringBuffer();

View Full Code Here

    public String toString() {
        return imageType + ":" + dataBytes.length + "bytes";
    }


    protected void build(ByteBuffer raw) {
        Mp4BoxHeader header = new Mp4BoxHeader(raw);
        dataSize = header.getDataLength();
        dataAndHeaderSize = header.getLength();


        //Skip the version and length fields
        raw.position(raw.position() + Mp4DataBox.PRE_DATA_LENGTH);


        //Read the raw data into byte array
        this.dataBytes = new byte[dataSize - Mp4DataBox.PRE_DATA_LENGTH];
        raw.get(dataBytes, 0, dataBytes.length);


        //Is there room for another atom (remember actually passed all the data so unless Covr is last atom
        //there will be room even though more likely to be for the text top level atom)
        int positionAfterDataAtom = raw.position();
        if (raw.position() + Mp4BoxHeader.HEADER_LENGTH <= raw.limit()) {
            //Is there a following name field (not the norm)
            Mp4BoxHeader nameHeader = new Mp4BoxHeader(raw);
            if (nameHeader.getId().equals(Mp4NameBox.IDENTIFIER)) {
                dataSize += nameHeader.getDataLength();
                dataAndHeaderSize += nameHeader.getLength();
            } else {
                raw.position(positionAfterDataAtom);
            }
        }

View Full Code Here

        return Mp4FieldType.TEXT;
    }


    protected void build(ByteBuffer data) throws UnsupportedEncodingException {
        //Read mean box, set the issuer and skip over data
        Mp4BoxHeader meanBoxHeader = new Mp4BoxHeader(data);
        Mp4MeanBox meanBox = new Mp4MeanBox(meanBoxHeader, data);
        setIssuer(meanBox.getIssuer());
        data.position(data.position() + meanBoxHeader.getDataLength());


        //Read name box, identify what type of field it is
        Mp4BoxHeader nameBoxHeader = new Mp4BoxHeader(data);
        Mp4NameBox nameBox = new Mp4NameBox(nameBoxHeader, data);
        setDescriptor(nameBox.getName());
        data.position(data.position() + nameBoxHeader.getDataLength());


        //Issue 198:There is not actually a data atom there cannot cant be because no room for one
        if (parentHeader.getDataLength() == meanBoxHeader.getLength() + nameBoxHeader.getLength()) {
            id = IDENTIFIER + ":" + issuer + ":" + descriptor;
            setContent("");
            //logger.warning(ErrorMessage.MP4_REVERSE_DNS_FIELD_HAS_NO_DATA.getMsg(id));
        }
        //Usual Case
        else {
            //Read data box, identify the data
            Mp4BoxHeader dataBoxHeader = new Mp4BoxHeader(data);
            Mp4DataBox dataBox = new Mp4DataBox(dataBoxHeader, data);
            setContent(dataBox.getContent());
            data.position(data.position() + dataBoxHeader.getDataLength());


            //Now calculate the id which in order to be unique needs to use all htree values
            id = IDENTIFIER + ":" + issuer + ":" + descriptor;
        }
    }

View Full Code Here

            boxHeader = Mp4BoxHeader.seekWithinLevel(moovBuffer, Mp4NotMetaFieldKey.META.getFieldName());
            if (boxHeader == null) {
                //logger.warning(ErrorMessage.MP4_FILE_HAS_NO_METADATA.getMsg());
                return tag;
            }
            Mp4MetaBox meta = new Mp4MetaBox(boxHeader, moovBuffer);
            meta.processData();


            //Level 4- Search for "ilst" within meta
            boxHeader = Mp4BoxHeader.seekWithinLevel(moovBuffer, Mp4NotMetaFieldKey.ILST.getFieldName());
            //This file does not actually contain a tag
            if (boxHeader == null) {
                //logger.warning(ErrorMessage.MP4_FILE_HAS_NO_METADATA.getMsg());
                return tag;
            }
        } else {
            //Level 2-Searching for "meta" not within udta
            boxHeader = Mp4BoxHeader.seekWithinLevel(moovBuffer, Mp4NotMetaFieldKey.META.getFieldName());
            if (boxHeader == null) {
                //logger.warning(ErrorMessage.MP4_FILE_HAS_NO_METADATA.getMsg());
                return tag;
            }
            Mp4MetaBox meta = new Mp4MetaBox(boxHeader, moovBuffer);
            meta.processData();




            //Level 3- Search for "ilst" within meta
            boxHeader = Mp4BoxHeader.seekWithinLevel(moovBuffer, Mp4NotMetaFieldKey.ILST.getFieldName());
            //This file does not actually contain a tag

View Full Code Here

        //We set the buffers position back to this after processing the children
        int justAfterHeaderPos = moovBuffer.position();


        //Preprocessing for meta that normally contains 4 data bytes, but doesn't where found under track or tags atom
        if (parentBoxHeader.getId().equals(Mp4NotMetaFieldKey.META.getFieldName())) {
            Mp4MetaBox meta = new Mp4MetaBox(parentBoxHeader, moovBuffer);
            meta.processData();


            try {
                boxHeader = new Mp4BoxHeader(moovBuffer);
            } catch (NullBoxIdException nbe) {
                //It might be that the meta box didn't actually have any additional data after it so we adjust the buffer

View Full Code Here

                    hdlrWithinMdiaNode = newAtom;
                } else if (boxHeader.getId().equals(Mp4NotMetaFieldKey.TAGS.getFieldName())) {
                    tagsNode = newAtom;
                } else if (boxHeader.getId().equals(Mp4NotMetaFieldKey.STCO.getFieldName())) {
                    if (stco == null) {
                        stco = new Mp4StcoBox(boxHeader, moovBuffer);
                        stcoNode = newAtom;
                    }
                } else if (boxHeader.getId().equals(Mp4NotMetaFieldKey.ILST.getFieldName())) {
                    DefaultMutableTreeNode parent = (DefaultMutableTreeNode) parentNode.getParent();
                    if (parent != null) {

View Full Code Here

                try {
                    boxHeader.update(headerBuffer);
                } catch (NullBoxIdException ne) {
                    //If we only get this error after all the expected data has been found we allow it
                    if (moovNode != null & mdatNode != null) {
                        NullPadding np = new NullPadding(fc.position() - Mp4BoxHeader.HEADER_LENGTH, fc.size());
                        DefaultMutableTreeNode trailingPaddingNode = new DefaultMutableTreeNode(np);
                        rootNode.add(trailingPaddingNode);
                        //logger.warning(ErrorMessage.NULL_PADDING_FOUND_AT_END_OF_MP4.getMsg(np.getFilePos()));
                        break;
                    } else {

View Full Code Here

0 1

TOP

Related Classes of org.jaudiotagger.audio.mp4.atom.Mp4BoxHeader

com.tulskiy.musique.audio.formats.mp4.MP4FileReader

org.jaudiotagger.audio.AudioFileIO

org.jaudiotagger.audio.mp4.atom.Mp4BoxHeader

org.jaudiotagger.audio.mp4.atom.Mp4MetaBox

org.jaudiotagger.audio.mp4.atom.Mp4StcoBox

org.jaudiotagger.audio.mp4.atom.NullPadding

org.jaudiotagger.audio.mp4.Mp4AtomTree

org.jaudiotagger.audio.mp4.Mp4TagReader

org.jaudiotagger.tag.mp4.field.Mp4DiscNoField

org.jaudiotagger.tag.mp4.field.Mp4GenreField

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.