vorbis_comment.java

/*
 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.
 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS
 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE
 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.
 *
 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2002
 * by the Xiph.Org Foundation http://www.xiph.org/
 */

package org.xiph.libvorbis;

import org.xiph.libogg.*;

public class vorbis_comment {

    // unlimited user comment fields.  libvorbis writes 'libvorbis' whatever vendor is set to in encode

    public byte[][] user_comments;
    public int[] comment_lengths;
    public int comments;
    public byte[] vendor;

    public vorbis_comment() {

        vorbis_comment_init();
    }

    public void vorbis_comment_init() {

        user_comments = null;
        comments = 0;
        vendor = null;
    }

    public void vorbis_comment_add(String comment) {

        add(comment.getBytes());
    }

    private void add(byte[] comment) {

        byte[][] foo = new byte[comments + 2][];
        if (user_comments != null) {
            System.arraycopy(user_comments, 0, foo, 0, comments);
        }
        user_comments = foo;

        int[] goo = new int[comments + 2];
        if (comment_lengths != null) {
            System.arraycopy(comment_lengths, 0, goo, 0, comments);
        }
        comment_lengths = goo;

        byte[] bar = new byte[comment.length + 1];
        System.arraycopy(comment, 0, bar, 0, comment.length);
        user_comments[comments] = bar;
        comment_lengths[comments] = comment.length;
        comments++;
        user_comments[comments] = null;
    }

    public void vorbis_comment_add_tag(String tag, String contents) {

        if (contents == null)
            contents = "";
        vorbis_comment_add(tag + "=" + contents);
    }

    public boolean vorbis_commentheader_out(ogg_packet op) {

        oggpack_buffer opb = new oggpack_buffer();
        if (!opb._vorbis_pack_comment(this))
            return false;

        // build the packet
        op.packet = new byte[opb.oggpack_bytes()];
        // memcpy(b->header1,opb.buffer,oggpack_bytes(&opb));
        System.arraycopy(opb.buffer, 0, op.packet, 0, opb.oggpack_bytes());
        op.bytes = opb.oggpack_bytes();
        op.b_o_s = 0;
        op.e_o_s = 0;
        op.granulepos = 0;
        op.packetno = 1;

        return true;
    }
}