On 03/28/2007 12:16 PM, Takashi Iwai wrote: > At Mon, 26 Mar 2007 11:28:59 +0200, > Sven Johnsson wrote: >> Rene, >> >> I have already read the ALSA driver document. What I really like to >> understand is when DMA transfers are invoked, and what the source and >> destination for the transfer is. > > The DMA transfer is started/stopped in trigger callback. > In the case of typical playback, the source is the buffer the driver > allocated (in hw_params callback) and the destination is the > hardware. The DMA setup is usually done in prepare callback. Oh, sorry... had to look at this one before answering but then forgot about it while looking at a local capture problem. Rene. _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
