[alsa-devel] [PATCH] pcm: rate: Add capability to pass configuration node to plugins

It is useful for the converter used by a rate plugin to be capable of receiving configuration. This patch enables the "converter" node of the configuration of a "type rate" plugin to be specified as a compound and passed to open func of the converter plugin.

The SND_PCM_RATE_PLUGIN_VERSION is incremented and SND_PCM_RATE_PLUGIN_VERSION_CONFIGURE is defined so that a converter plugin can test whether it should expect the extra parameter on its open func.

Alan.