peter
/
libraw1394
Archived
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
libraw1394 fork
This repository has been archived on 2022-09-20. You can view files and clone it, but cannot push or open issues or pull requests.
247 Commits 1 Branch 14 Tags 728 KiB
C 98.5%
Shell 0.5%
M4 0.5%
Makefile 0.5%
Go to file
Stefan Richter d3ace3dfb4 Fix FCP and ARM source node ID on firewire-core 
The firewire-core (juju) backend of libraw1394 installs address range
mappings on the default ioctl fd, i.e. a file that represents a random
device on the chosen port.  It receives incoming requests from any
sender node via this address range mapping.  Due to a kernel ABI
limitation, the sender node ID is not known though.  So far libraw1394
simply assumed the node ID of the device that provided the default
ioctl fd.  This only works if there is only one accessible fd on the
entire bus.

This limitation caused for example libffado to fail to work with
another AV/C or IIDC device attached to the bus, because node IDs of
FCP requests and FCP responses did not match since the latter were
wrong.  FCP clients which did not check sender node IDs were seemingly
not affected by this bug.  The bug is fixed by a kernel ABI extension
in Linux 2.6.36.  This libraw1394 change implements libraw1394's
counterpart to this ABI extension.

Hence this libraw1394 fix requires
  - kernel-headers 2.6.36 or later at build time of libraw1394
  - kernel 2.6.36 or later at runtime.
Otherwise, libraw1394 simply degrades to the faulty previous behaviour.

Side note:  The change of IMPLEMENTED_CDEV_ABI_VERSION to 4 requires
that we fill in struct fw_cdev_allocate.region_end which was added in
the ABI v4.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
 		2010-09-07 11:27:01 +02:00
debian fix make dist without doc 2004-10-31 00:52:28 +00:00
doc doc: let "make clean" remove generated HTML files 2010-02-01 22:10:12 +01:00
src Fix FCP and ARM source node ID on firewire-core 2010-09-07 11:27:01 +02:00
tools tools/dumpiso: Add write() return code checks, fix harmless format string bug 2010-09-07 11:26:55 +02:00
AUTHORS Document contact address (linux1394-devel) more clearly 2010-02-01 22:10:12 +01:00
COPYING.LIB Ensure this ends up in distributions. 2000-03-12 04:08:48 +00:00
ChangeLog Update ChangeLog for release. 2009-12-26 17:09:52 -08:00
INSTALL Reset the libtool age. 2008-07-18 01:08:30 -07:00
Makefile.am Fix build due to incomplete tarball. 2009-06-30 11:12:55 -07:00
NEWS Set to version 2.0.5. 2009-12-26 17:09:07 -08:00
README Document contact address (linux1394-devel) more clearly 2010-02-01 22:10:12 +01:00
autogen.sh Ooops...libtool works a bit different than I thought, but atleast it works 2003-07-13 01:27:13 +00:00
configure.ac Set to version 2.0.5. 2009-12-26 17:09:07 -08:00
libraw1394.pc.in pkgconfig include path should not contain libraw1394 2004-11-20 04:56:36 +00:00
libraw1394.spec.in bump versions, build fixes, and doc updates 2004-10-30 22:49:27 +00:00

README 

				   libraw1394
				   ==========

1. About libraw1394

	libraw1394 is the only supported interface to the kernel side raw1394 of
the Linux IEEE-1394 subsystem, which provides direct access to the connected
1394 buses to user space.  Through libraw1394/raw1394, applications can directly
send to and receive from other nodes without requiring a kernel driver for the
protocol in question.

	The reason for making a library the interface to the kernel is to avoid
a program dependancy on the kernel version, which would hinder development and
optimization of raw1394.  If development changed the protocol and made it
incompatible with previous versions only the libraw1394 has to be upgraded to
match the kernel version (instead of all applications).


2. Copyleft

	libraw1394 itself is licensed under the Lesser General Public License
(short LGPL, see file COPYING.LIB in the source distribution).  Other files in
the source archives not belonging to but being part of the build procedure of
libraw1394 are under their own licenses, as stated at the top of the individual
files.


3. API documentation

	Finally there is something, in the doc subdirectory.  The file is
libraw1394.sgml (it's Docbook format), and there are preformatted PostScript and
HTML available.  This documentation is not complete yet.


4. Multithreading

	This library should be multithreadable with the restriction that one
raw1394handle_t may be used only within a single thread.  Multiple threads
operating on the same handle would royally mess up the kernel-user protocol.
Simply use separate handles for each thread in which you need to use libraw1394.


5. Pkg-config

	The library comes with a pkg-config .pc file, so you can check for
libraw1394 and its version in your configure script.  For example, here is how 
to use the autoconf macro:

PKG_CHECK_MODULES(LIBRAW1394, libraw1394 >= 1.1.0)

	This macro sets the variables LIBRAW1394_CFLAGS and LIBRAW1394_LIBS.  You 
have to include those into your build variables so that the build process 
correctly links with libraw1394.


6. Contact

	Send questions, suggestions, bug reports and patches to the mailing
list linux1394-devel@lists.sourceforge.net.  This list is open for posting
without prior subscription, and replies will usually be Cc'd to you.

	Maintainer of libraw1394 is currently Dan Dennedy.  See the file
AUTHORS for a complete list of contributors to libraw1394.

	Visit http://ieee1394.wiki.kernel.org/ for more information, including
links to mailing list subscription interfaces, to list archives, and to the
libraw1394 source repository.