On Wed, Jun 09, 2010 at 11:16:28AM +0200, Daniel Mack wrote:
On Fri, Jun 04, 2010 at 09:49:36PM +0200, Jaroslav Kysela wrote:
If a stream parameter changes, the driver should interrupt streaming immediatelly. The check should be in the trigger() callback (-EIO error code) and if the stream is already running - it should be put to the SNDRV_PCM_STATE_DRAINING (capture) to let the application obtain the captured samples until the parameter change. Just call snd_pcm_stop() with the new state for the substream. For playback, the stream should be put to the SNDRV_PCM_STATE_OPEN state to wait to settle new parameters from an application (it means that all I/O ops will return -EBADFD).
Hmm. I implemented this now, but at least aplay won't stop when this code path is triggered. Is there anything else I should do, except for calling snd_pcm_stop()?
Strange enough, aplay doesn't even quit when the device is unplugged. Can anyone confirm this with an UAC1 device?
Daniel