/**
* Get the next rtp packet recorded in the rtpdump file.
*
* @param loopFile if true, when the end of the rtpdump file is reached, this
* <tt>RtpdumpFileReader</tt> will go back at the beginning of the file and get the first
* packet.
* @return a <tt>RawPacket</tt> containing all the information and data of the next rtp packet
* recorded in the rtpdump file
* @throws IOException if <tt>loopFile</tt> was false and the end of the file is reached.
*/
public RawPacket getNextPacket(boolean loopFile) throws IOException {
if (loopFile && (stream.getFilePointer() >= stream.length())) {
resetFile();
}
byte[] rtpdumpPacket;
int sizeInBytes;
stream.readShort(); // read away an useless short (2 bytes)
sizeInBytes = stream.readUnsignedShort();
rtpdumpPacket = new byte[sizeInBytes];
stream.readInt(); // read away the rtpdump timestamp
stream.read(rtpdumpPacket);
return new RawPacket(rtpdumpPacket, 0, rtpdumpPacket.length);
}
private void doTheDamnThing(RandomAccessFile fp) throws IOException {
byte[] b = new byte[26];
// Load IMPM header
fp.read(b, 0, 4);
if (b[0] == 'I' && b[1] == 'M' && b[2] == 'P' && b[3] == 'M') {
loadDataIT(fp);
return;
}
// Attempt to load XM
fp.seek(0);
if (Util.readStringNoNul(fp, b, 17).equals("Extended Module: ")) {
fp.seek(17 + 20);
if (fp.read() == 0x1A) {
fp.seek(17);
loadDataXM(fp);
return;
}
}
// Attempt to load ST3 module
fp.seek(0x1C);
if (fp.readUnsignedShort() == 0x1A10) {
fp.seek(0);
loadDataS3M(fp);
return;
}
fp.seek(0);
// Assume this is a .mod file
if (true) {
loadDataMOD(fp);
return;
}
throw new RuntimeException("module format not supported");
}