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Diffstat (limited to 'songdbj/com/jcraft/jorbis/Comment.java')
-rw-r--r--songdbj/com/jcraft/jorbis/Comment.java252
1 files changed, 252 insertions, 0 deletions
diff --git a/songdbj/com/jcraft/jorbis/Comment.java b/songdbj/com/jcraft/jorbis/Comment.java
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+++ b/songdbj/com/jcraft/jorbis/Comment.java
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+/* JOrbis
+ * Copyright (C) 2000 ymnk, JCraft,Inc.
+ *
+ * Written by: 2000 ymnk<ymnk@jcraft.com>
+ *
+ * Many thanks to
+ * Monty <monty@xiph.org> and
+ * The XIPHOPHORUS Company http://www.xiph.org/ .
+ * JOrbis has been based on their awesome works, Vorbis codec.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public License
+ * as published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+package com.jcraft.jorbis;
+
+import com.jcraft.jogg.*;
+
+// the comments are not part of vorbis_info so that vorbis_info can be
+// static storage
+public class Comment{
+ private static byte[] _vorbis="vorbis".getBytes();
+
+ private static final int OV_EFAULT=-129;
+ private static final int OV_EIMPL=-130;
+
+ // 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 void init(){
+ user_comments=null;
+ comments=0;
+ vendor=null;
+ }
+
+ public void 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 add_tag(String tag, String contents){
+ if(contents==null) contents="";
+ add(tag+"="+contents);
+ }
+
+/*
+ private void add_tag(byte[] tag, byte[] contents){
+ byte[] foo=new byte[tag.length+contents.length+1];
+ int j=0;
+ for(int i=0; i<tag.length; i++){foo[j++]=tag[i];}
+ foo[j++]=(byte)'='; j++;
+ for(int i=0; i<contents.length; i++){foo[j++]=tag[i];}
+ add(foo);
+ }
+*/
+
+ // This is more or less the same as strncasecmp - but that doesn't exist
+ // * everywhere, and this is a fairly trivial function, so we include it
+ static boolean tagcompare(byte[] s1, byte[] s2, int n){
+ int c=0;
+ byte u1, u2;
+ while(c < n){
+ u1=s1[c]; u2=s2[c];
+ if('Z'>=u1 && u1>='A')u1=(byte)(u1-'A'+'a');
+ if('Z'>=u2 && u2>='A')u2=(byte)(u2-'A'+'a');
+ if(u1!=u2){ return false; }
+ c++;
+ }
+ return true;
+ }
+
+ public String query(String tag){
+ return query(tag, 0);
+ }
+
+ public String query(String tag, int count){
+ int foo=query(tag.getBytes(), count);
+ if(foo==-1)return null;
+ byte[] comment=user_comments[foo];
+ for(int i=0; i<comment_lengths[foo]; i++){
+ if(comment[i]=='='){
+ return new String(comment, i+1, comment_lengths[foo]-(i+1));
+ }
+ }
+ return null;
+ }
+
+ private int query(byte[] tag, int count){
+ int i=0;
+ int found = 0;
+ int fulltaglen = tag.length + 1;
+ byte[] fulltag = new byte[fulltaglen];
+ System.arraycopy(tag, 0, fulltag, 0, tag.length);
+ fulltag[tag.length]=(byte)'=';
+
+ for(i=0;i<comments;i++){
+ if(tagcompare(user_comments[i], fulltag, fulltaglen)){
+ if(count==found){
+ // We return a pointer to the data, not a copy
+ //return user_comments[i] + taglen + 1;
+ return i;
+ }
+ else{ found++; }
+ }
+ }
+ return -1;
+ }
+
+ int unpack(Buffer opb){
+ int vendorlen=opb.read(32);
+ if(vendorlen<0){
+ //goto err_out;
+ clear();
+ return(-1);
+ }
+ vendor=new byte[vendorlen+1];
+ opb.read(vendor,vendorlen);
+ comments=opb.read(32);
+ if(comments<0){
+ //goto err_out;
+ clear();
+ return(-1);
+ }
+ user_comments=new byte[comments+1][];
+ comment_lengths=new int[comments+1];
+
+ for(int i=0;i<comments;i++){
+ int len=opb.read(32);
+ if(len<0){
+ //goto err_out;
+ clear();
+ return(-1);
+ }
+ comment_lengths[i]=len;
+ user_comments[i]=new byte[len+1];
+ opb.read(user_comments[i], len);
+ }
+ if(opb.read(1)!=1){
+ //goto err_out; // EOP check
+ clear();
+ return(-1);
+
+ }
+ return(0);
+// err_out:
+// comment_clear(vc);
+// return(-1);
+ }
+
+ int pack(Buffer opb){
+ byte[] temp="Xiphophorus libVorbis I 20000508".getBytes();
+
+ // preamble
+ opb.write(0x03,8);
+ opb.write(_vorbis);
+
+ // vendor
+ opb.write(temp.length,32);
+ opb.write(temp);
+
+ // comments
+
+ opb.write(comments,32);
+ if(comments!=0){
+ for(int i=0;i<comments;i++){
+ if(user_comments[i]!=null){
+ opb.write(comment_lengths[i],32);
+ opb.write(user_comments[i]);
+ }
+ else{
+ opb.write(0,32);
+ }
+ }
+ }
+ opb.write(1,1);
+ return(0);
+ }
+
+ public int header_out(Packet op){
+ Buffer opb=new Buffer();
+ opb.writeinit();
+
+ if(pack(opb)!=0) return OV_EIMPL;
+
+ op.packet_base = new byte[opb.bytes()];
+ op.packet=0;
+ op.bytes=opb.bytes();
+ System.arraycopy(opb.buffer(), 0, op.packet_base, 0, op.bytes);
+ op.b_o_s=0;
+ op.e_o_s=0;
+ op.granulepos=0;
+ return 0;
+ }
+
+ void clear(){
+ for(int i=0;i<comments;i++)
+ user_comments[i]=null;
+ user_comments=null;
+ vendor=null;
+ }
+
+ public String getVendor(){
+ return new String(vendor, 0, vendor.length-1);
+ }
+ public String getComment(int i){
+ if(comments<=i)return null;
+ return new String(user_comments[i], 0, user_comments[i].length-1);
+ }
+ public String toString(){
+ String foo="Vendor: "+new String(vendor, 0, vendor.length-1);
+ for(int i=0; i<comments; i++){
+ foo=foo+"\nComment: "+new String(user_comments[i], 0, user_comments[i].length-1);
+ }
+ foo=foo+"\n";
+ return foo;
+ }
+}
generated by cgit v1.1 at 2026-05-04 10:51:02 +0000