Read the contents of a box, including sub boxes.
Right now it just prints the box value rather than
returning anything.
Entry point for C language callers.
Take a buffer and call read_box() on it,
returning the number of detected tracks.
Parse a box out of a data buffer.
Parse a stco box.
Parse a elst box.
Parse an ftyp box.
Parse a hdlr box.
Parse a mdhd box.
Parse an mvhd box.
Parse a stco box.
Parse a stsc box.
Parse a stsd box.
Parse a stss box.
Parse a stsz box.
Parse a stts box.
Parse a tkhd box.
Skip over the entire contents of a box.
Skip over the remaining contents of a box.