NAME

       isodump - format of IEEE 1394 isochronous packets dump file

DESCRIPTION

       The  isodump format stores a series of IEEE 1394 isochronous stream packets (possibly from
       multiple channels), including their headers.  Its main use is  as  the  output  format  of
       dumpiso(1) and the input format of sendiso(1).

       The 32 byte header starts at offset 0 with the string "1394 isodump v1" followed by a zero
       byte.  The next 8 bytes form a 64 bit big endian integer, which represents a bit  mask  of
       the  channels  that  were dumped.  A set bit at position (1 << x) signifies that channel x
       was being listened on.  The following 8 bytes are set to zero.

       The iso packets follow the header and are appended to the data stream in  the  order  they
       were  received.   The packets consist of the header quadlet as originally received and the
       data quadlets following directly.  The CRC quadlets after header and data  do  not  appear
       and everything is in big endian, as seen on the bus.

       There  is  no further framing of the packets in the format, packet boundaries can be found
       by looking at the data size field in the header quadlet of each  packet.   The  data  size
       field  appears  in the most significant 16 bits of the header quadlet, contain the size in
       bytes (the actual packet is padded to a multiple of four bytes) and  do  not  include  the
       header packet.

COMPATIBILITY

       This  format  was introduced with the iso send and dump tools distributed with libraw1394.
       No one else uses it so far.

SEE ALSO

       sendiso(1), dumpiso(1)

AUTHOR

       Andreas Bombe <aeb@debian.org>