Plugin loading and unloading

[Marcel Holtmann <marcel@holtmann.org>]

Hi guys,

I am working again on the A2DP Bluetooth plugin and the caching support
in the latest ALSA library is nice and allows me to keep the underlaying
link connected while stupid programs like XMMS closes the PCM when they
switch the tracks.

The PCM opening part and reusing of the underlaying AVDTP connection is
easy, but I am a little bit concerned about the plugin unloading time.
So is it possible to add init() and exit() functions that are called
when the plugin is loaded and unloaded. Like we have for kernel modules?

Do the ALSA library has a timer mechanism that we can use inside a
plugin. Since it is a bad idea to hold the Bluetooth connection open for
all the time, I like to add a idle timeout. This allows me to put the
connection into sniff mode to save power or terminate it.

Also the listing of plugins is still missing. I am fine with a general
or plugin specific flag to make its PCM visible.

Regards

Marcel




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