TYPE: COP
TITLE: Switch COP

This operation passes the input of one of its connected inputs through, acting
like an exclusive switch. 

This COP does not use any image cache space, nor does it cook anything.

Parameters
    Input Index - The index of the input to pass through.

Local Variables:
    L   - Sequence length
    S   - Start of sequence
    E   - End of sequence
    IL  - Input sequence length
    SR  - Sequence frame rate  
    NP  - Number of planes in sequence
    W,H - Width and height of image
