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bit 0.4.90 (Default branch)
11-03-2008
bit is a library that makes it easier to dynamically manipulate data buffers containing fields that do not have octet (byte) boundaries. An example is the IP header, which is generally dealt with at compile time via bit fields in a structure. A key feature of the bit library is support for loading data formats described in XML files and dynamically parsing those fields at run time. This library was initially created to support reading various kinds of robotic device I/O (IR sensors, motors), but it has also been used for run time parsing of IP, TCP, UDP, and RTP headers. License: GNU General Public License v3 Changes:|
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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 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 every- thing 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> libraw1394 2.0.9 isodump v1 isodump(5)