[alsa-devel] Monitoring ALSA's write pointer (appl_ptr)?

Hello List,

My first post, so excuse any ignorance.

Is there a definitive/safe way to monitor ALSA's write pointer in the dma_area? It seems like the ack callback and the appl_ptr is the correct way, but I was told by another developer that appl_ptr doesn't work in all cases.

As a future optimization for my hardware, I may want to tell ALSA to use a specific area of physical memory for it's dma_area, what is the best way to do that?

Thanks,

Brian