Hi all,
snd_ctl_ext_callback::read_event() callback is mentioned as optional (see http://git.alsa-project.org/?p=alsa-lib.git;a=blob;f=include/control_externa...)
but there is no NULL check and the NULL pointer will be called if the read_event function callback pointer is not set. (see http://git.alsa-project.org/?p=alsa-lib.git;a=blob;f=src/control/control_ext...)
I think a default function has to be provided which will be called when the callback is not set or the read_event() callback should not be marked as optional.
What is your opinion?
Best regards
Timo Wischer
Advanced Driver Information Technology GmbH
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