[alsa-devel] Newbie needs help to understand SNDRV_PCM_TRIGGER_START?

Clemens Ladisch clemens at ladisch.de
Tue Oct 19 15:03:41 CEST 2010

Radivoje Jovanovic wrote:
> ALSA hits trigger method in my driver and soon after it leaves my trigger
> method throws an null pointer exception

What code hits a NULL pointer?

> I am wondering if the ALSA will call SNDRV_PCM_TRIGGER_START every single
> time new buffer is available.

No, once the stream is started, ALSA expects the device to run by itself
(if not, the driver has to use timers).


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