* Give our threads names
It helps with debugging.
* Use Q_OBJECT macro to automatically name threads.
By default, QThread sets its name based on the Qt meta class. To get an
accurate metaclass, the class which inherits QThread must declare
Q_OBJECT in its header. Futhermore, Qt's MOC requires that a Qt type be
the primary base class when declaring Q_OBJECT, hence the order of
base classes has been rearranged for some classes.
This version lets the user select the ALSA device to use with a combo
box. It does not check whether the device works for the parameters that
LMMS uses (SND_PCM_ACCESS_RW_INTERLEAVED, SND_PCM_FORMAT_S16_LE, etc.).
Doing these checks while compiling the list of available devices led to
strange effects which are likely caused by the fact that the PCM device
has to be opened to query its capabilities. This in turn led to error
messages a la "Resource or device busy" when testing the new
functionality repeatedly.
However, having a combo box to select devices from should be a good step
forward compared to a simple line edit. :)
Moved AudioDevice::setupWidget into its own class AudioDeviceSetupWidget
which logically should belong to the GUI (unfortunately the include
structure does not make this obvious).
For the ALSA driver there is an implementation AudioAlsaSetupWidget
which provides a combo box for selection of the card and device.
All other driver widgets have been changed to inherit from
AudioAlsaSetupWidget but have not been changed otherwise.
SetupDialog has been adjusted to keep a map of AudioAlsaSetupWidgets
now.
Shows a combo box with the available ALSA cards and devices instead of a
line edit. The problem currently is that the widgets are nested classes
of AudioDevice and therefore the macro Q_OBJECT does not work which
means that its not possible to define slots that react to retrieved
signals.
