ch0 (CHAR) - input

The first character of the FOURCC code to be converted.

ch1 (CHAR) - input

The second character of the FOURCC code to be converted.

ch2 (CHAR) - input

The third character of the FOURCC code to be converted.

ch3 (CHAR) - input

The fourth character of the FOURCC code to be converted.

rc (FOURCC) - returns

Returns the four-character code converted from the four characters as follows. Character ch0 is copied to the lowest address and ch3 is copied to the highest address.