isodump(5)		       Linux IEEE 1394			   isodump(5)



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 for-
       mat 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 dis-
       tributed with libraw1394.  No one else uses it so far.

SEE ALSO
       sendiso(1), dumpiso(1)

AUTHOR
       Andreas Bombe 



libraw1394 1.0.0		  isodump v1			   isodump(5)

UNIX/Linux commands referenced on this page:

1. dump
2. as
3. at
4. which
5. size