parseSize function
Implementation
int parseSize(List<int> block, int major_v) {
int len;
if (major_v == 4) {
assert(block.length == 4);
len = block[0] << 21;
len += block[1] << 14;
len += block[2] << 7;
len += block[3];
} else if (major_v == 3) {
assert(block.length == 4);
len = block[0] << 24;
len += block[1] << 16;
len += block[2] << 8;
len += block[3];
} else if (major_v == 2) {
assert(block.length == 3);
len = block[0] << 16;
len += block[1] << 8;
len += block[2];
} else {
throw MP3ParserException("Unknown major version $major_v");
}
return len;
}