read function

[Gustavo da Silva Serra <gustavo.serra@tet.com.br>]

Hi,

    I am trying to understand how aloop interacts with alsa. I 
understand that the interface between alsa and a driver is an audio 
buffer and pointers, offsets inside this buffer. However, I can't 
discover where these pointers are being used. In pcm_lib.c I inserted 
some debug messages in read/write functions, but they are never called. 
My question is: how is that the snd_pcm_readi, for example, from 
libasound reaches the driver.

Thanks.