snd_oxfw_stream_get_current_formation
err = snd_oxfw_stream_get_current_formation(oxfw, dir, &formation);
err = snd_oxfw_stream_get_current_formation(oxfw,
err = snd_oxfw_stream_get_current_formation(oxfw,
err = snd_oxfw_stream_get_current_formation(oxfw, dir, &formation);
err = snd_oxfw_stream_get_current_formation(oxfw, dir, &formation);
int snd_oxfw_stream_get_current_formation(struct snd_oxfw *oxfw,