| 1 | package org.farng.mp3.id3; |
| 2 | |
| 3 | import org.farng.mp3.AbstractMP3Tag; |
| 4 | import org.farng.mp3.TagException; |
| 5 | import org.farng.mp3.TagNotFoundException; |
| 6 | import org.farng.mp3.TagOptionSingleton; |
| 7 | import org.farng.mp3.TagUtility; |
| 8 | |
| 9 | import java.io.IOException; |
| 10 | import java.io.RandomAccessFile; |
| 11 | import java.util.Iterator; |
| 12 | |
| 13 | /** |
| 14 | * <TABLE border=0> <TBODY> <TR> <TD class=h2>What is ID3v1.1?</TD></TR></TBODY></TABLE> <TABLE border=0> <TBODY> <TR |
| 15 | * vAlign=top> <TD> <P>ID3v1 may well be easy to implement for programmers, but it sure is frustrating for those with |
| 16 | * their own, creative ideas. Since the ID3v1 tag had a fixed size and no space marked "Reserved for future use", there |
| 17 | * isn't really room for that much improvement, if you want to maintain compatibility with existing software.</P> |
| 18 | * <p/> |
| 19 | * <P>One who found a way out was Michael Mutschler who made a quite clever improvement on ID3v1. Since all non-filled |
| 20 | * fields must be padded with zeroed bytes its a good assumption that all ID3v1 readers will stop reading the field when |
| 21 | * they encounter a zeroed byte. If the second last byte of a field is zeroed and the last one isn't we have an extra |
| 22 | * byte to fill with information. As the comments field is to short to write anything useful in the ID3v1.1 standard |
| 23 | * declares that this field should be 28 characters, that the next byte always should be zero and that the last byte |
| 24 | * before the genre byte should contain which track on the CD this music comes from.</P></TD> </TR></TBODY></TABLE> |
| 25 | * |
| 26 | * @author Eric Farng |
| 27 | * @version $Revision: 1.7 $ |
| 28 | */ |
| 29 | public class ID3v1_1 extends ID3v1 { |
| 30 | |
| 31 | protected byte track = -1; |
| 32 | |
| 33 | /** |
| 34 | * Creates a new ID3v1_1 object. |
| 35 | */ |
| 36 | public ID3v1_1() { |
| 37 | super(); |
| 38 | } |
| 39 | |
| 40 | /** |
| 41 | * Creates a new ID3v1_1 object. |
| 42 | */ |
| 43 | public ID3v1_1(final ID3v1_1 copyObject) { |
| 44 | super(copyObject); |
| 45 | this.track = copyObject.track; |
| 46 | } |
| 47 | |
| 48 | /** |
| 49 | * Creates a new ID3v1_1 object. |
| 50 | */ |
| 51 | public ID3v1_1(final AbstractMP3Tag mp3tag) { |
| 52 | if (mp3tag != null) { |
| 53 | if (mp3tag instanceof ID3v1) { |
| 54 | if (mp3tag instanceof ID3v1_1) { |
| 55 | throw new UnsupportedOperationException("Copy Constructor not called. Please type cast the argument"); |
| 56 | } |
| 57 | |
| 58 | // id3v1_1 objects are also id3v1 objects |
| 59 | final ID3v1 id3old = (ID3v1) mp3tag; |
| 60 | this.title = new String(id3old.title.trim()); |
| 61 | this.artist = new String(id3old.artist.trim()); |
| 62 | this.album = new String(id3old.album.trim()); |
| 63 | this.comment = new String(id3old.comment.trim()); |
| 64 | this.year = new String(id3old.year.trim()); |
| 65 | this.genre = id3old.genre; |
| 66 | } else { |
| 67 | // first change the tag to ID3v2_4 tag. |
| 68 | // id3v2_4 can take any tag. |
| 69 | final ID3v2_4 id3tag; |
| 70 | id3tag = new ID3v2_4(mp3tag); |
| 71 | ID3v2_4Frame frame; |
| 72 | String text; |
| 73 | if (id3tag.hasFrame("TIT2")) { |
| 74 | frame = (ID3v2_4Frame) id3tag.getFrame("TIT2"); |
| 75 | text = ((FrameBodyTIT2) frame.getBody()).getText(); |
| 76 | this.title = TagUtility.truncate(text, 30); |
| 77 | } |
| 78 | if (id3tag.hasFrame("TPE1")) { |
| 79 | frame = (ID3v2_4Frame) id3tag.getFrame("TPE1"); |
| 80 | text = ((FrameBodyTPE1) frame.getBody()).getText(); |
| 81 | this.artist = TagUtility.truncate(text, 30); |
| 82 | } |
| 83 | if (id3tag.hasFrame("TALB")) { |
| 84 | frame = (ID3v2_4Frame) id3tag.getFrame("TALB"); |
| 85 | text = ((FrameBodyTALB) frame.getBody()).getText(); |
| 86 | this.album = TagUtility.truncate(text, 30); |
| 87 | } |
| 88 | if (id3tag.hasFrame("TDRC")) { |
| 89 | frame = (ID3v2_4Frame) id3tag.getFrame("TDRC"); |
| 90 | text = ((FrameBodyTDRC) frame.getBody()).getText(); |
| 91 | this.year = TagUtility.truncate(text, 4); |
| 92 | } |
| 93 | if (id3tag.hasFrameOfType("COMM")) { |
| 94 | final Iterator iterator = id3tag.getFrameOfType("COMM"); |
| 95 | text = ""; |
| 96 | while (iterator.hasNext()) { |
| 97 | frame = (ID3v2_4Frame) iterator.next(); |
| 98 | text += (((FrameBodyCOMM) frame.getBody()).getText() + " "); |
| 99 | } |
| 100 | this.comment = TagUtility.truncate(text, 28); |
| 101 | } |
| 102 | if (id3tag.hasFrame("TCON")) { |
| 103 | frame = (ID3v2_4Frame) id3tag.getFrame("TCON"); |
| 104 | text = ((FrameBodyTCON) frame.getBody()).getText(); |
| 105 | try { |
| 106 | this.genre = (byte) TagUtility.findNumber(text); |
| 107 | } catch (TagException ex) { |
| 108 | this.genre = 0; |
| 109 | } |
| 110 | } |
| 111 | if (id3tag.hasFrame("TRCK")) { |
| 112 | frame = (ID3v2_4Frame) id3tag.getFrame("TRCK"); |
| 113 | text = ((FrameBodyTRCK) frame.getBody()).getText(); |
| 114 | try { |
| 115 | this.track = (byte) TagUtility.findNumber(text); |
| 116 | } catch (TagException ex) { |
| 117 | this.track = 0; |
| 118 | } |
| 119 | } |
| 120 | } |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | /** |
| 125 | * Creates a new ID3v1_1 object. |
| 126 | */ |
| 127 | public ID3v1_1(final RandomAccessFile file) throws TagNotFoundException, IOException { |
| 128 | this.read(file); |
| 129 | } |
| 130 | |
| 131 | public void setComment(final String comment) { |
| 132 | this.comment = TagUtility.truncate(comment, 28); |
| 133 | } |
| 134 | |
| 135 | public String getComment() { |
| 136 | return this.comment; |
| 137 | } |
| 138 | |
| 139 | public String getIdentifier() { |
| 140 | return "ID3v1_1.10"; |
| 141 | } |
| 142 | |
| 143 | public void setTrack(final byte track) { |
| 144 | this.track = track; |
| 145 | } |
| 146 | |
| 147 | public byte getTrack() { |
| 148 | return this.track; |
| 149 | } |
| 150 | |
| 151 | public void append(final AbstractMP3Tag tag) { |
| 152 | final ID3v1_1 oldTag = this; |
| 153 | final ID3v1_1 newTag; |
| 154 | if (tag != null) { |
| 155 | if (tag instanceof ID3v1_1) { |
| 156 | newTag = (ID3v1_1) tag; |
| 157 | } else { |
| 158 | newTag = new ID3v1_1(tag); |
| 159 | } |
| 160 | if (tag instanceof org.farng.mp3.lyrics3.AbstractLyrics3) { |
| 161 | TagOptionSingleton.getInstance().setId3v1SaveTrack(false); |
| 162 | } |
| 163 | oldTag.track = (TagOptionSingleton.getInstance().isId3v1SaveTrack() && (oldTag.track <= 0)) ? |
| 164 | newTag.track : |
| 165 | oldTag.track; |
| 166 | |
| 167 | // we don't need to reset the tag options because |
| 168 | // we want to save all fields (default) |
| 169 | } |
| 170 | |
| 171 | // we can't send newTag here because we need to keep the lyrics3 |
| 172 | // class type ... check super.append and you'll see what i mean. |
| 173 | super.append(tag); |
| 174 | } |
| 175 | |
| 176 | public boolean equals(final Object obj) { |
| 177 | if ((obj instanceof ID3v1_1) == false) { |
| 178 | return false; |
| 179 | } |
| 180 | final ID3v1_1 id3v1_1 = (ID3v1_1) obj; |
| 181 | if (this.track != id3v1_1.track) { |
| 182 | return false; |
| 183 | } |
| 184 | return super.equals(obj); |
| 185 | } |
| 186 | |
| 187 | public void overwrite(final AbstractMP3Tag tag) { |
| 188 | final ID3v1_1 oldTag = this; |
| 189 | ID3v1_1 newTag = null; |
| 190 | if (tag != null) { |
| 191 | if (tag instanceof ID3v1_1) { |
| 192 | newTag = (ID3v1_1) tag; |
| 193 | } else { |
| 194 | newTag = new ID3v1_1(tag); |
| 195 | } |
| 196 | if (tag instanceof org.farng.mp3.lyrics3.AbstractLyrics3) { |
| 197 | TagOptionSingleton.getInstance().setId3v1SaveTrack(false); |
| 198 | } |
| 199 | oldTag.track = TagOptionSingleton.getInstance().isId3v1SaveTrack() ? newTag.track : oldTag.track; |
| 200 | |
| 201 | // we don't need to reset the tag options because |
| 202 | // we want to save all fields (default) |
| 203 | } |
| 204 | super.overwrite(newTag); |
| 205 | } |
| 206 | |
| 207 | public void read(final RandomAccessFile file) throws TagNotFoundException, IOException { |
| 208 | final byte[] buffer = new byte[30]; |
| 209 | if (this.seek(file) == false) { |
| 210 | throw new TagNotFoundException("ID3v1.1 tag not found"); |
| 211 | } |
| 212 | file.read(buffer, 0, 30); |
| 213 | this.title = new String(buffer, 0, 30, "ISO-8859-1").trim(); |
| 214 | file.read(buffer, 0, 30); |
| 215 | this.artist = new String(buffer, 0, 30, "ISO-8859-1").trim(); |
| 216 | file.read(buffer, 0, 30); |
| 217 | this.album = new String(buffer, 0, 30, "ISO-8859-1").trim(); |
| 218 | file.read(buffer, 0, 4); |
| 219 | this.year = new String(buffer, 0, 4, "ISO-8859-1").trim(); |
| 220 | file.read(buffer, 0, 28); |
| 221 | this.comment = new String(buffer, 0, 28, "ISO-8859-1").trim(); |
| 222 | |
| 223 | // if this value is zero, then check the next value |
| 224 | // to see if it's the track number. ID3v1.1 |
| 225 | file.read(buffer, 0, 2); |
| 226 | if (buffer[0] == 0) { |
| 227 | this.track = buffer[1]; |
| 228 | } else { |
| 229 | throw new TagNotFoundException("ID3v1.1 Tag Not found"); |
| 230 | } |
| 231 | file.read(buffer, 0, 1); |
| 232 | this.genre = buffer[0]; |
| 233 | } |
| 234 | |
| 235 | public boolean seek(final RandomAccessFile file) throws IOException { |
| 236 | final byte[] buffer = new byte[3]; |
| 237 | if (file.length() < 128) { |
| 238 | return false; |
| 239 | } |
| 240 | |
| 241 | // Check for the empty byte before the TRACK |
| 242 | file.seek(file.length() - 3); |
| 243 | buffer[0] = file.readByte(); |
| 244 | if (buffer[0] != 0) { |
| 245 | return false; |
| 246 | } |
| 247 | |
| 248 | // If there's a tag, it's 128 bytes long and we'll find the tag |
| 249 | file.seek(file.length() - 128); |
| 250 | |
| 251 | // read the TAG value |
| 252 | file.read(buffer, 0, 3); |
| 253 | final String tag = new String(buffer, 0, 3); |
| 254 | return tag.equals("TAG"); |
| 255 | } |
| 256 | |
| 257 | public String toString() { |
| 258 | String str = getIdentifier() + " " + this.getSize() + "\n"; |
| 259 | str += ("Title = " + this.title + "\n"); |
| 260 | str += ("Artist = " + this.artist + "\n"); |
| 261 | str += ("Album = " + this.album + "\n"); |
| 262 | str += ("Comment = " + this.comment + "\n"); |
| 263 | str += ("Year = " + this.year + "\n"); |
| 264 | str += ("Genre = " + this.genre + "\n"); |
| 265 | str += ("Track = " + this.track + "\n"); |
| 266 | return str; |
| 267 | } |
| 268 | |
| 269 | public void write(final AbstractMP3Tag tag) { |
| 270 | final ID3v1_1 oldTag = this; |
| 271 | ID3v1_1 newTag = null; |
| 272 | if (tag != null) { |
| 273 | if (tag instanceof ID3v1_1) { |
| 274 | newTag = (ID3v1_1) tag; |
| 275 | } else { |
| 276 | newTag = new ID3v1_1(tag); |
| 277 | } |
| 278 | oldTag.track = newTag.track; |
| 279 | } |
| 280 | super.write(newTag); |
| 281 | } |
| 282 | |
| 283 | public void write(final RandomAccessFile file) throws IOException { |
| 284 | final byte[] buffer = new byte[128]; |
| 285 | int i; |
| 286 | int offset = 3; |
| 287 | String str; |
| 288 | delete(file); |
| 289 | file.seek(file.length()); |
| 290 | buffer[0] = (byte) 'T'; |
| 291 | buffer[1] = (byte) 'A'; |
| 292 | buffer[2] = (byte) 'G'; |
| 293 | str = TagUtility.truncate(this.title, 30); |
| 294 | for (i = 0; i < str.length(); i++) { |
| 295 | buffer[i + offset] = (byte) str.charAt(i); |
| 296 | } |
| 297 | offset += 30; |
| 298 | str = TagUtility.truncate(this.artist, 30); |
| 299 | for (i = 0; i < str.length(); i++) { |
| 300 | buffer[i + offset] = (byte) str.charAt(i); |
| 301 | } |
| 302 | offset += 30; |
| 303 | str = TagUtility.truncate(this.album, 30); |
| 304 | for (i = 0; i < str.length(); i++) { |
| 305 | buffer[i + offset] = (byte) str.charAt(i); |
| 306 | } |
| 307 | offset += 30; |
| 308 | str = TagUtility.truncate(this.year, 4); |
| 309 | for (i = 0; i < str.length(); i++) { |
| 310 | buffer[i + offset] = (byte) str.charAt(i); |
| 311 | } |
| 312 | offset += 4; |
| 313 | str = TagUtility.truncate(this.comment, 28); |
| 314 | for (i = 0; i < str.length(); i++) { |
| 315 | buffer[i + offset] = (byte) str.charAt(i); |
| 316 | } |
| 317 | offset += 28; |
| 318 | offset++; |
| 319 | buffer[offset] = this.track; // skip one byte extra blank for 1.1 |
| 320 | |
| 321 | // definition |
| 322 | offset++; |
| 323 | buffer[offset] = this.genre; |
| 324 | file.write(buffer); |
| 325 | } |
| 326 | |
| 327 | public String getTrackNumberOnAlbum() { |
| 328 | return Integer.toString(getTrack()); |
| 329 | } |
| 330 | |
| 331 | public void setTrackNumberOnAlbum(String trackNumberOnAlbum) { |
| 332 | setTrack(Byte.parseByte(trackNumberOnAlbum.trim())); |
| 333 | } |
| 334 | } |