public void parseBlock() {
int index = 0;
TrackNo = (int) EBML.readEBMLCode(data);
index = EBML.codedSizeLength(TrackNo);
HeaderSize += index;
short BlockTimecode1 = (short) (data[index++] & 0xFF);
short BlockTimecode2 = (short) (data[index++] & 0xFF);
if (BlockTimecode1 != 0 || BlockTimecode2 != 0) {
BlockTimecode = (BlockTimecode1 << 8) | BlockTimecode2;
}
int flags = data[index++] & 0xFF;
int LaceFlag = flags & 0x06;
int SeekableFlag = flags & 0x80;
if (SeekableFlag == 0x80) seekable = true;
HeaderSize += 3;
if (LaceFlag != 0x00) {
System.out.println("LACED");
byte LaceCount = data[index++];
HeaderSize += 1;
if (LaceFlag == 0x02) {
Sizes = readXiphLaceSizes(index, LaceCount);
} else if (LaceFlag == 0x06) {
Sizes = readEBMLLaceSizes(index, LaceCount);
} else if (LaceFlag == 0x04) {
Sizes = new int[LaceCount + 1];
Sizes[0] = (int) (data.length - HeaderSize) / (LaceCount + 1);
for (int s = 0; s < LaceCount; s++) Sizes[s + 1] = Sizes[0];
} else {
throw new RuntimeException("Unsupported lacing type flag.");
}
}
}
public int[] readEBMLLaceSizes(int index, short LaceCount) {
int[] LaceSizes = new int[LaceCount + 1];
LaceSizes[LaceCount] = data.length;
int startIndex = index;
LaceSizes[0] = (int) EBML.readEBMLCode(data, index);
index += EBML.codedSizeLength(LaceSizes[0]);
LaceSizes[LaceCount] -= LaceSizes[0];
long FirstEBMLSize = LaceSizes[0];
long LastEBMLSize = 0;
for (int l = 0; l < LaceCount - 1; l++) {
LastEBMLSize = EBML.readSignedEBMLCode(data, index);
index += EBML.codedSizeLength(LastEBMLSize);
FirstEBMLSize += LastEBMLSize;
LaceSizes[l + 1] = (int) FirstEBMLSize;
LaceSizes[LaceCount] -= LaceSizes[l + 1];
}
HeaderSize = HeaderSize + (int) (index - startIndex);
LaceSizes[LaceCount] -= HeaderSize;
return LaceSizes;
}