This class provides an interface to reading the q-metric file:

The file format for q-metrics is as follows:

Header

illumina::interop::io::read_metrics (Function that parses this information)

    byte 0: version number (7)
    byte 1: record size (8 + 4*binCount if flag is true otherwise 208)

Extended Header

illumina::interop::io::generic_layout<q_metric, 7> (Class that parses this information)

    byte 2:                         flag indicating whether is has bins (bool)

If byte 2 is true, then the following information is also in the header:

 byte 3:              number of bins (uint8)
 byte 4-4+binCount*3: array of (low, high, value) for each bin (uint8)

n-Records

illumina::interop::io::layout::base_cycle_metric (Class that parses this information)

    2 bytes: lane number (uint16)
    4 bytes: tile number (uint32)
    2 bytes: cycle number (uint16)

illumina::interop::io::generic_layout<q_metric, 7> (Class that parses this information)

    4*binCount bytes: q-score histogram (uint32_t*binCount)

Note, if the header has no bins, then binCount is 50 for the records