Device reservation could fail because of bad system setup.
Trying to open the device anyway seems to have no undesired impact.

We recommend using symbolic names like hw:Live but when subdevices are used
regcomp() was failing to parse them. This changeset improves the algorithm
by using less assumptions.

* Don't attempt to use device reservation when card_to_num() mapping
   has failed. In case of card_to_num() failures, "Audio-1" device
   was reserved on start but not released on stop. This was causing
   next start to fail with out of memory error, and since previous
   commit, with "A handler is already registered for
   /org/freedesktop/ReserveDevice1/Audio-1" error.
 * In case of playback device reservation failure, release the
   capture device
 * Remove unused fReservedCaptureDevice and fReservedPlaybackDevice
   data members of the JackAlsaDriver class

We recommend this at http://jackaudio.org/device_naming

fixes #18

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.

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@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@4396 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4395 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/branches/libjacknet@4307 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4273 0c269be4-1314-0410-8aa9-9f06e86f4224

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git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4222 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4218 0c269be4-1314-0410-8aa9-9f06e86f4224

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git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4204 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4202 0c269be4-1314-0410-8aa9-9f06e86f4224

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git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4184 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/branches/libjacknet@4181 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4151 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4143 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4088 0c269be4-1314-0410-8aa9-9f06e86f4224

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git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4081 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4079 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4051 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/branches/libjacknet@4005 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@3979 0c269be4-1314-0410-8aa9-9f06e86f4224

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git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@3848 0c269be4-1314-0410-8aa9-9f06e86f4224