Input pads:
Minimum required permissions on incoming buffers. Any buffer with
insufficient permissions will be automatically copied by the filter
system to a new buffer which provides the needed access permissions.
Output pads:
Guaranteed permissions on outgoing buffers. Any buffer pushed on the
link must have at least these permissions; this fact is checked by
asserts. It can be used to optimize buffer allocation.
Input pads: Minimum required permissions on incoming buffers. Any buffer with insufficient permissions will be automatically copied by the filter system to a new buffer which provides the needed access permissions.
Output pads: Guaranteed permissions on outgoing buffers. Any buffer pushed on the link must have at least these permissions; this fact is checked by asserts. It can be used to optimize buffer allocation.