[alsa-devel] dsd formats in ALSA plugins

Hello. I'm writing plugin with external filter plugin SDK, they make some manipulation on received samples. But i can't use dsd formats. As i understand, they not allowed in all plugins (extplug, ioplug and internal alsa-lib)? params_any + params_test_format(... dsd_u32_le) = error -22 Is this a ALSA lib restriction or i do something wrong

Thanks