A CD+G parser
This documentation is probably best read alongside CD+G Revealed
The CD+G format is very closely tied to the details of how compact
discs store audio; it's intended to be stored in the subchannel
data alongside normal Red Book audio. For the purposes of
consuming this data from a .cdg file using this library, all
that it is important to know is that the file is divided into
sectors of 96 bytes, each of which represents 1/75th of a second.
The CD+G display model is a 300x216-pixel indexed color framebuffer divided into 6x12-pixel tiles, with a 16-color palette. The outermost cell on each side (i.e., the top and bottom 12 rows and the left and right 6 columns) are drawn a solid "border color" rather than drawn from the framebuffer.