public static void splitMp3(File in, File out, File log) {
byte[] buffer;
byte[] buf2;
int byteread;
long bytesum = 0;
Id3v23Header id3header;
Mp3FrameHeader mp3header;
int nextsize = 0;
long out_cnt = 0;
long fileLength = in.length();
try {
System.out.println(in.getAbsolutePath() + ",size=" + fileLength);
InputStream inStream = new FileInputStream(in);
while ((fileLength - bytesum) > 0) {
buffer = new byte[4];
if ((byteread = inStream.read(buffer)) == -1) {
System.out.println("read error Mp3FrameHeader(4bytes)");
inStream.close();
System.out.println("read=" + bytesum);
return;
}
bytesum += byteread;
mp3header = new Mp3FrameHeader(buffer);
System.out.println("MP3Header=" + mp3header);
if (!mp3header.isValid()) {
buf2 = new byte[6];
if ((byteread = inStream.read(buf2)) == -1) {
System.out.println("read error ID3Frame(10bytes)");
inStream.close();
System.out.println("read=" + bytesum);
return;
}
bytesum += byteread;
byte[] tmp = new byte[10];
System.arraycopy(buffer, 0, tmp, 0, buffer.length);
System.arraycopy(buf2, 0, tmp, buffer.length, buf2.length);
id3header = new Id3v23Header(tmp);
System.out.println("ID3Header=" + id3header);
nextsize = (int) id3header.getId3Size();
} else {
nextsize = mp3header.getSize() - 4;
}
buf2 = new byte[nextsize];
if ((byteread = inStream.read(buf2)) == -1) {
System.out.println("read error Mp3FrameHeader(4bytes)");
inStream.close();
System.out.println("read=" + bytesum);
return;
}
bytesum += byteread;
if (mp3header.isValid()) {
byte[] tmp = new byte[nextsize + 4];
System.arraycopy(buffer, 0, tmp, 0, buffer.length);
System.arraycopy(buf2, 0, tmp, buffer.length, buf2.length);
String fileName = in.getName();
String outFile =
out.getAbsolutePath()
+ "/"
+ fileName.substring(0, fileName.indexOf("."))
+ "_"
+ Strings.format(String.valueOf(out_cnt), 5, '0')
+ ".mp3";
OutputStream os = new FileOutputStream(outFile);
os.write(tmp);
os.close();
out_cnt++;
}
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
System.out.println("bytesum=" + bytesum);
}