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This repository has been archived on 2022-09-20.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.
272 Commits 1 Branch 14 Tags 728 KiB
C 98.5%
Shell 0.5%
M4 0.5%
Makefile 0.5%
Go to file
Stefan Richter 5b4cffe9d7 Add raw1394_read_cycle_timer_and_clock() API 
This is an extension relative to raw1394_read_cycle_timer().
It lets the client choose a system clock other than CLOCK_REALTIME.

Use case: http://subversion.ffado.org/ticket/242

The underlying ioctl supports reading the system clock with nanoseconds
resolution.  The new libraw1394 call sticks with microseconds resolution
though.  This makes transition from (or parallel use with)
raw1394_read_cycle_timer() easier.  Besides, the call itself takes longer
than a  microsecond, primarily due to a costly MMIO read (on many
controllers even three or more MMIO reads).

Unit tests with CLOCK_MONOTONIC and CLOCK_MONOTONIC_RAW are added to
testlibraw as well.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
 		2012-06-18 01:53:32 +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 Add raw1394_read_cycle_timer_and_clock() API 2012-06-18 01:53:32 +02:00
tools Add raw1394_read_cycle_timer_and_clock() API 2012-06-18 01:53:32 +02:00
AUTHORS configure.ac, Changelog, NEWS etc.: update to version 2.0.6 2010-11-01 23:25:36 +01:00
COPYING.LIB Ensure this ends up in distributions. 2000-03-12 04:08:48 +00:00
ChangeLog configure.ac, Changelog, NEWS etc.: update to version 2.0.9 2012-06-02 16:48:26 +02:00
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 configure.ac, Changelog, NEWS etc.: update to version 2.0.9 2012-06-02 16:48:26 +02:00
README configure.ac, Changelog, NEWS etc.: update to version 2.0.6 2010-11-01 23:25:36 +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 configure.ac, Changelog, NEWS etc.: update to version 2.0.9 2012-06-02 16:48:26 +02:00
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 dependency 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).

	Since version 2, libraw1394 also works with the kernel driver
firewire-core.  libraw1394's role has thus become that of a raw1394
compatibility layer for existing applications when running on firewire-core.


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.  Visit
http://ieee1394.wiki.kernel.org/ for links to list subscription interfaces and
list archives.

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

	Source repository:
git://git.kernel.org/pub/scm/libs/ieee1394/libraw1394.git
http://git.kernel.org/pub/scm/libs/ieee1394/libraw1394.git
https://git.kernel.org/pub/scm/libs/ieee1394/libraw1394.git

	Gitweb:
http://git.kernel.org/?p=libs/ieee1394/libraw1394.git

	Release tarballs:
https://www.kernel.org/pub/linux/libs/ieee1394/
ftp://ftp.kernel.org/pub/linux/libs/ieee1394/