Parameter order doesnt matter for jackd but does for jackdbus. jackd
sets parameters (via Control API) in the order they were specified at
commandline. Thus, the jackd user is expected to specify parameters in
correct order. This is not good solution for jackdbus though. jackdbus
settings persistence in ~/.config/jack/jack.xml stores parameter in
the order they are defined by the driver. OTOH the D-Bus interface
itself suggests no particular order. For example the user can change
only one parameter via the jack_control tool. Other parameters either
have their default values or the ones that were previously set are
used.

The particular ordering problem this changeset aims to fix is that when
user specifies capture/playback device and device, the first one(s)
is/are ignored. This happens because the device parameter is set after
the capture/playback device parameters. The alsa then uses the string
from the device parameter for both capture and playback devices,
despite the user wish to override one or both of them.

ffado_streaming_set_period_size() is exposed starting r2078 of FFADO.
To avoid a build dependency on ffado-svn in jack, we copy the prototype
declaration.

Since the symbol is defined as weak, no problems arise at runtime.

serverlib loads drivers not vice versa.

Cleanup of obsolete code, the functionality is now provided
by UpdateLatencies().

This is a port of Jonathan Woithe's patch from jackd1.
With sufficiently recent versions of FFADO, it allows to change
the buffersize at runtime.

In preparation for the upcoming FFADO buffersize functionality,
add code that updates the latency afterwards.

Idea for this fix found in
   http://code.google.com/p/waf/issues/detail?id=800#c1

jackdbus needs explicit index because device reservation code
is shared with jackd and waf cannot autodetect this.

config.h is generated in build/, that's "../" at compile time.

For the sake of completeness, here's the waf error:

[122/163] cxx: common/Jackdmp.cpp -> build/common/Jackdmp.cpp.1.o
In file included from ../common/Jackdmp.cpp:35:0:
../common/JackConstants.h:24:20: fatal error: config.h: No such file or directory
compilation terminated.
Waf: Leaving directory `/home/adi/jack2/build'
Build failed
 -> task in 'jackd' failed (exit status 1):
        {task 39469904: cxx Jackdmp.cpp -> Jackdmp.cpp.1.o}
['/usr/bin/g++', '-Wall', '-I/home/adi/jack2/build/linux', '-I/home/adi/jack2/linux', '-I/home/adi/jack2/build/posix', '-I/home/adi/jack2/posix', '-I/home/adi/jack2/build/common/jack', '-I/home/adi/jack2/common/jack', '-I/home/adi/jack2/build/common', '-I/home/adi/jack2/common', '-I/home/adi/jack2/build/dbus', '-I/home/adi/jack2/dbus', '-DHAVE_CONFIG_H', '-DSERVER_SIDE', '../common/Jackdmp.cpp', '-c', '-o', 'common/Jackdmp.cpp.1.o']

waf complains about missing features in the builder, so let's add some.

For the sake of completeness, here's an example error message:

Traceback (most recent call last):
  File "/home/adi/jack2/.waf-1.6.11-30618c54883417962c38f5d395f83584/waflib/Runner.py", line 162, in start
    st=tsk.runnable_status()
  File "/home/adi/jack2/.waf-1.6.11-30618c54883417962c38f5d395f83584/waflib/Task.py", line 285, in runnable_status
    new_sig=self.signature()
  File "/home/adi/jack2/.waf-1.6.11-30618c54883417962c38f5d395f83584/waflib/Task.py", line 274, in signature
    self.sig_implicit_deps()
  File "/home/adi/jack2/.waf-1.6.11-30618c54883417962c38f5d395f83584/waflib/Task.py", line 372, in sig_implicit_deps
    (nodes,names)=self.scan()
  File "/home/adi/jack2/.waf-1.6.11-30618c54883417962c38f5d395f83584/waflib/Tools/c_preproc.py", line 594, in scan
    raise Errors.WafError('%r is missing a feature such as "c", "cxx" or "includes": '%task.generator)
WafError: bld(uselib_local='clientlib', posted=True, features=[], idx=28, uselib='RT SNDFILE', meths=['process_rule', 'process_source'], prec=defaultdict(<type 'list'>, {}), includes=['../linux', '../posix', '../common/jack', '../common'], source=[/home/adi/jack2/example-clients/capture_client.c], mappings={}, path=/home/adi/jack2/example-clients, _name='jack_rec', target='jack_rec') in /home/adi/jack2/example-clients is missing a feature such as "c", "cxx" or "includes":

Prevents waf configure from failing if not marked as non-mandatory.

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4739 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4736 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4730 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4684 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4677 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4664 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4657 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4608 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4604 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4602 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4595 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4587 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4586 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4529 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4522 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4493 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4396 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4395 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4377 0c269be4-1314-0410-8aa9-9f06e86f4224

gcc (Gentoo 4.4.5 p1.2, pie-0.4.5) 4.4.5

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4363 0c269be4-1314-0410-8aa9-9f06e86f4224

fixes compilation on linux

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4362 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4361 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4352 0c269be4-1314-0410-8aa9-9f06e86f4224

The main goal is to reduce risk of mismatch between allocated
and initialized parameter numbers.

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4346 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/branches/libjacknet@4324 0c269be4-1314-0410-8aa9-9f06e86f4224