This driver is very similar to the JackNetDriver, but instead of connecting
through the network, it connects to its upstream server through standard jack
API. So it can only reach local servers which must be running as the same user
or in promiscuous mode.

The main use case is the multi-user, multi-session, shared workstation:

 - a classic server with hw driver is launched system-wide at boot time, in
   promiscuous mode, optionaly restricted to the audio group
 - in each user session, a jackdbus server is automatically started with
   JackProxyDriver as master driver, automatically connected to the
   system-wide one
 - optionaly, each user run PulseAudio with a pulse-jack bridge

Removed a spurious initOK label in the driver_initialize function.

No functional change, only whitespace.

This reverts commit 3087895772.

This reverts commit 23f5919c62.

This reverts commit d56717901a.

This reverts commit f08a3f4234.

Renamed JackIIODriver.C -> JackIIODriver.cpp
Renamed JackIIODriver.H -> JackIIODriver.h
Added delete iio_driver when failure is encountered when executing driver_initialize.

Downgraded eigen3 and sox version requirements for building iio.
Switched to using IIOMMap to access the IIO subsystem.
Added the overloaded methods for JackIIODriver::Attach, JackIIODriver::Detach, JackIIODriver::Read and JackIIODriver::Write.
Rewrite the JackIIODriver.C code to work properly.

Patch by Adam Conrad <adconrad@canonical.com>, taken from Ubuntu's
jackd2 package.

Fixes linkage errors as described in

   http://permalink.gmane.org/gmane.comp.audio.jackit/25841

serverlib loads drivers not vice versa.

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@4377 0c269be4-1314-0410-8aa9-9f06e86f4224

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

git-svn-id: http://subversion.jackaudio.org/jack/jack2/branches/libjacknet@4307 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/branches/libjacknet@4239 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4236 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4199 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/branches/libjacknet@3900 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@3833 0c269be4-1314-0410-8aa9-9f06e86f4224

The revert in r3818 was wrong because r3816 was correct in svn.
The revert error in r3818 happened,
because svn r3816 had wrong git version 9fb8b55379
the right git version of svn r3816 is c9bbc68a8d

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@3820 0c269be4-1314-0410-8aa9-9f06e86f4224

That changeset is supposed to only patch Jackdmp.cpp

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@3818 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/branches/libjacknet@3814 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@3809 0c269be4-1314-0410-8aa9-9f06e86f4224

Conflicts:

	example-clients/wscript

git-svn-id: http://subversion.jackaudio.org/jack/jack2/branches/libjacknet@3614 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@3608 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@3603 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@3579 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/branches/libjacknet@3564 0c269be4-1314-0410-8aa9-9f06e86f4224